2016年12月28日星期三
2016年12月27日星期二
The basic principle of submersible sewage pump
First, the basic principles
Submersible sewage pump is a kind of pump used in the environmental protection industry to transport solid-liquid mixed liquid such as solid particles, fiber, such as domestic sewage, industrial wastewater, mud and so on. WQ submersible sewage pump consists of sewage pump, sealing system, submersible motor, control and protection system, automatic installation system and other parts. And the general sewage pump is different: WQ-type submersible sewage pump and motor coaxial rotation, and dive into the liquid at the same time work. The pump sealing system can effectively prevent the liquid into the motor cavity, the protection of motor safe operation. Control and protection system to pump in the event of leakage, oil spills, overload, overheating, lack of equal fault, timely alarm and shutdown for repair.
Second, the technical key
Submersible sewage pump is a kind of pump used in the environmental protection industry to transport solid-liquid mixed liquid such as solid particles, fiber, such as domestic sewage, industrial wastewater, mud and so on. WQ submersible sewage pump consists of sewage pump, sealing system, submersible motor, control and protection system, automatic installation system and other parts. And the general sewage pump is different: WQ-type submersible sewage pump and motor coaxial rotation, and dive into the liquid at the same time work. The pump sealing system can effectively prevent the liquid into the motor cavity, the protection of motor safe operation. Control and protection system to pump in the event of leakage, oil spills, overload, overheating, lack of equal fault, timely alarm and shutdown for repair.
Second, the technical key
The automatic mounting system allows the pump to be automatically connected or disconnected from the piping system during installation and removal by a coupling device. WQ submersible sewage pump is an indispensable important equipment in water treatment. Its safe operation directly affects the entire water treatment system safe operation, therefore, in the WQ type submersible sewage pump, the most important question is guarantees the water pump use reliability, but affects the sewage pump use reliability the key question is the pump Sealing performance and no overload performance and important parts of the service life of the seal in the pump, we use the auxiliary impeller hydrodynamic seal and mechanical seal combination of new sealing technology, the sealing reliability has been greatly improved. In the absence of overload performance, we use the whole field theory of pump hydraulic design, while using dual-channel impeller, the pump not only has a greater capacity and more importantly, the pump in the entire range of power will not exceed Motor rated power using motor overload.
Multi-stage pump works
Multi-stage pump is a centrifugal pump, but also rely on the rotation of the impeller to obtain centrifugal force, thus the material. Until the gas density reaches the working range of the mechanical vacuum pump and is drawn out, thereby gradually obtaining a high vacuum. In the multi-stage pump is equipped with the appropriate amount of water as the working fluid. When the impeller clockwise rotation, the water was thrown around the impeller, due to the role of centrifugal force, the water to form a shape determined by the pump cavity of the approximate thickness of a closed ring. The inner surface of the lower part of the water ring is tangent to the impeller hub, and the upper inner surface of the water ring is in contact with the tip of the blade (actually the blade has a certain depth of insertion in the water ring).
At this point the wheel hub and the water ring between the formation of a crescent-shaped space, and this space is divided by the impeller and leaves the number of equal number of small cavity. If the impeller of the lower 0 ° as a starting point, then the impeller in the rotation 180 ° before the small chamber volume from small to large, and the end of the suction port connected, then the gas is inhaled, when the suction end of the small cavity When the impeller continues to rotate, the small cavity from large to small, so that the gas is compressed; when the small cavity and the exhaust port is connected, the gas will be discharged outside the pump.
To sum up, multi-stage pump is to rely on changes in the pump chamber volume to achieve suction, compression and exhaust, so it can be variable-volume centrifugal pump. Multi-stage pump can be used in petroleum, chemical, machinery, mining, light industry, medicine and food and many other industrial sectors. In many industrial processes, such as vacuum filtration, vacuum diversion, vacuum feed, vacuum evaporation, vacuum concentration, vacuum regain and vacuum degassing, multi-stage pump has been widely used. Can be extracted flammable, explosive gas, in addition to pumping dust, water gas, therefore, the increasing use of water ring pump.
2016年12月23日星期五
Submersible pump safety protection
Submersible pumps are often damaged by water shortages in the pool. In view of this situation, today you sort out the submersible pump several protection measures: water protection, motor leakage protection, oil chamber leakage protection, insulation resistance protection, winding overheating protection, bearing overheating protection.
1, prohibit the power supply voltage abnormal start
As the low-voltage power supply line is relatively long, the end of the line voltage is too low is common. When the phase voltage is below 198 volts, the line voltage is lower than 342 volts, submersible pump motor speed down, when less than 70% of the rated speed, start the centrifugal switch will be closed, resulting in a long start winding power and even burn Windings and capacitors. Conversely, a high voltage causes the motor to overheat and burn out the winding. Therefore, the submersible pump in operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage, higher than 10% of rated voltage above, the motor should stop running, find out the cause and troubleshooting.
2, confirm the correct direction of rotation of the motor
Should find out the direction of rotation of the motor, there are many types of high-lift submersible pumps are forward and reverse when the water can be, but the reversal of small water, the current is large, the reversal of a long time will damage the motor windings.
3, cable installation and submersible pump insulation resistance requirements
Install the submersible pump, the cable to overhead, the power cord should not be too long. Submersible pump into the water or put forward not to force the cable to avoid breaking the power cord. Do not sink submerged pump in the mud, otherwise it will lead to bad motor cooling and burn motor winding. Installation, the motor insulation resistance should not be less than 0.5 megohm.
4, to avoid frequent switching
Do not frequently switch the submersible pump, this is because the pump will stop when the return flow, if immediately start, the motor load will start, resulting in too large starting current and burn the winding. Due to the large current at start-up, the frequent start-up also burns the submersible pump motor windings.
5, the installation of leakage protection
Leakage protector, also known as Pauling device, its role from the Pauling device these three words can be understood. Because the submersible pump in the water, easy to leakage caused by power loss or even lead to electric shock accident. If the leakage protector is installed, the leakage protector will cut off the power of the submersible pump to ensure the safety and avoid the leakage and waste of the electric energy as long as the leakage value of the submersible pump exceeds the operating current value of the leakage protector (usually not more than 30mA).
6, prohibit long-term overload pump work
In order to avoid the long-term overload of submersible pumps, do not draw large amounts of sediment water and observe whether the current value specified in the nameplate value, if the current is too large, should stop inspection. In addition, the dehydration pump running time should not be too long, so as not to make the motor overheating and burned.
7, focus on routine maintenance
Usually check the motor, if found under the cover of a crack, rubber seal ring damage or failure, should be replaced or repaired in order to prevent water penetration into the machine.
8, try to avoid low-voltage boot
If the voltage is too high, it will cause the motor to overheat and burn out the winding. If the voltage is too low, the motor speed will decrease. If it does not reach 70% of the rated speed, the centrifugal switch will close, causing the start winding Long-term power and heat or even burn out the winding and capacitors. Do not frequently switch the motor, this is because the pump will stop when the return flow, if the immediate start, the motor load will start, resulting in starting current is too large and burn out the winding.
2016年12月22日星期四
Characteristics and maintenance of vertical sewage pump
Vertical sewage pump can be moved, can also be fixed for the construction, irrigation and drainage, enterprises and institutions in the process of sewage, pumping and transportation, in addition to the application of sewage, but also for the hydrophobic pump, pulp pump, irrigation With, can also be used for water and weak corrosive media. Now to introduce the characteristics of the vertical sewage pump and maintenance methods.
First, the pipeline sewage pump product characteristics
(1) sewage capacity, no clogging.
(2) the design is reasonable, supporting the motor power is small, energy-saving effect is remarkable.
(3) the use of wear-resistant mechanical seal.
(4) compact, easy to move, easy to install, no need to build the pump house, reduce project cost.
(5) can run in the whole head range, and ensure that the motor is not overloaded.
(6) inlet and outlet center line in a straight line, can be installed directly in the pipeline anywhere.
Second, the sewage pump maintenance and repair
(1) check the sewage pump piping and the junction with or without loosening. Turn the sewage pump by hand, see whether the sewage pump is flexible.
(2) to the bearing body by adding bearing lubricating oil, observe the oil level should be at the center of the oil standard, the oil should be replaced or added.
(3) unscrew the sewage pump pump body water plug, irrigation diversion (or cited pulp). Self - priming sewage pump.
(4) close the outlet valve and outlet pressure gauge and import vacuum gauge.
(5) Jog motor, see whether the motor steering is correct.
(6) start the motor, when the normal operation of the sewage pump, open the outlet pressure gauge and the import of vacuum pumps, as they show the appropriate pressure, and gradually open the gate valve, and check the motor load.
(7) try to control the flow of sewage pump and head in the range specified on the plate to ensure that the sewage pump in the highest efficiency point of operation, in order to obtain the greatest energy saving effect.
(8) sewage pump during operation, the bearing temperature can not exceed the ambient temperature of 35C, the maximum temperature of not more than 80C.
(9) If there is abnormal sound of sewage pump should immediately stop to check the cause.
(10) Sewage pump to stop using, first close the gate valve, pressure gauge, and then stop the motor.
(11) in the open pump sewage pump in the first month of work, after 100 hours of replacement of lubricating oil, after each 500 hours, oil change time.
(12) often adjust the packing gland, packing room to ensure that the normal drip (in order to drip out into the appropriate).
(13) periodic inspection sleeve wear, wear should be replaced after a large.
(14) sewage pump used in the winter season, after parking, need to pump the lower part of the water plug screwed open the media release the net. To prevent cracking.
(15) long-term suspension of sewage pumps, pumps need to open all, dry the water, the rotating parts and joints coated with grease installed.
2016年12月21日星期三
How to Reduce Energy Consumption of Pump in Spring
The advent of the spring, the use of pumps will enter the peak period, how to use the pump, pay attention to what issues can reduce energy consumption cost savings?
First, the pump surface and pressure water chamber (also known as volute) on the surface of rust.
Surface corrosion bumps will reduce pump water 7% -8%; maintenance only steel brush and iron sandpaper or grinding wheel smooth, you can make it in the work of fuel consumption or power consumption reduced by 9% -14%.
Second, the seal ring gap increases
According to the test when the impeller radius in the direction of the gap increased by 4 mm, thepump water will be reduced by 10%; maintenance only with organic adhesive plus asbestos back to the factory-defined gap, you can make the pump fuel consumption at work or electricity Consumption reduced by 10% -12%.
Third, the pressure chamber and impeller axis does not coincide
When the pressure chamber and the impeller axis deviation of 2 mm or more than 2 degrees, the pump water will be reduced by 5% -6%; maintenance only careful measurement, carefully identify the location coincides with the axis coincidence, you can make the pump Reduced oil or power consumption by 6% to 7% during operation.
2016年12月20日星期二
2016年12月18日星期日
Structure of pressurized water chamber of sewage pump
Sewage pump used in the pressurized water chamber is the most common volute, built-in submersible pumps in the choice of radial guide vane or flow channel guide vane. Volute spiral, ring and intermediate type three.
Centrifugal pump (except self-priming pump) should be before the start of the pump and the inlet pipe filled with water, centrifugal pump before filling the water there are two main methods: one is the use of assembly bottom valve filled with water. Otherwise the pump is unable to lift the work of the centrifugal pump does not start after the water is often due to pump the air is not drained, the water has not been filled due.
Insoluble sulfur production process, the high temperature insoluble sulfur quenching liquid to be quenched by the quenching liquid to be quenched by the centrifugal pump to complete, because the quenching liquid has a more corrosive, with a pump to stop the pump frequently, so the operator of the Irrigation pump is quite critical of the urgent urge to change the cumbersome and primitive pump method.
After analysis and study, decided to take the following methods to change irrigation pump operation, thus avoiding the need to pump every pump before the trouble, as shown in Figure 1, in the centrifugal pump inlet before adding a keg, installation, Keg bottom is not lower than the highest point of centrifugal pump casing, open the pump from the keg above the flange hole filled with quenching liquid, and then sealed with a blind flange flange, so that as long as a pump, No need to re-irrigation pump, which greatly improved the operator's working conditions.
2016年12月16日星期五
2016年12月15日星期四
Why pump vibration was badly
Pump in the operation of why the vibration, many people are worried, then we look at the reasons for the next pump vibration.
Pump vibration of the powerful reasons:
First, the mechanical side
Vibration can be felt out, hand touch the motor side, the pump head side, if only the motor vibration, it may couplings, or motor bearing problems. If only the pump head vibration, it may pump head bearings, mechanical seals, or impeller nut, or cavitation and other reasons. If the overall vibration, check the foot, you can also listen to the ear close to different parts, usually in the fault location to hear the more obvious noise. If you see the machine seal leakage, the possibility of mechanical seal burn out. Or the quality of the motor and pump rotating parts imbalance, shoddy, poor installation quality, the unit axis asymmetry, swing over the allowable value of parts of the mechanical strength and poor rigidity, bearing and seal components wear and tear, and the pump critical speed appears and The natural frequency of the unit has been caused by the resonance, will have a strong vibration and noise. 1, first check the foundation is fixed, base bolts are loose; 2, the impeller lock mother is loose; 3, the coupling is good; 4, the spindle is bent; 5, pump and motor bearings run outside, 8, also depends on the situation of the material, whether the viscosity is too large; 9, the suction tube is not too large; 9, the suction tube is not too strong; Or whether the filter is blocked; 10, suction pipe is too shallow into the liquid surface.
Second, the hydraulic aspects
Pump inlet flow velocity and pressure distribution is not uniform, the pump inlet and outlet working fluid pressure pulsation, liquid flow, bias and flow, non-rated conditions and a variety of reasons such as pump cavitation, are common cause pump unit vibration s reason. Pump start-up and shutdown, valve opening and closing, changes in working conditions and emergency shutdown and other dynamic transition process caused by rapid changes in water pressure within the pipeline and water hammer, etc., often lead to pump and unit vibration.
Third, the electrical aspects
Motor is the main equipment unit, the motor internal magnetic imbalance and other electrical system disorders, often caused by vibration and noise. If the asynchronous motor in operation, stator and rotor by the harmonic magnetic flux interaction between the stator and rotor radial alternating magnetic tension, or large-scale synchronous motor in operation, the rotor magnetic center is inconsistent or in all directions air gap Exceeding the allowable deviation value, etc., may cause the motor to periodically vibrate and make noise. Check whether the three-phase motor is running balance, check the power frequency is stable.
Fourth, water aspects
The design of the inlet passage is unreasonable or does not match with the unit, the submergence depth of the pump is improper, and the sequence of starting and stopping of the unit is unreasonable, which will make the water condition deteriorate, produce vortex, induce cavitation or aggravate the vibration of unit and pump house. When the siphon vacuum interrupting unit is used, if the humping air is difficult to be carried, the siphon time is too long; when the shutter door is broken, the unit door design is unreasonable; when it is closed, it constantly hits the door; Pump and motor base uneven subsidence or poor rigidity of the foundation and other reasons, will also lead to unit vibration.
Fifth, the process
1, check whether the pump in the design of the Ministry of Industry and run: head, flow, water temperature, vacuum suction height, etc. (is present in the cavitation conditions).
2, check the pump inlet and outlet valves are intact.
3, check the water is entrained with air or other gases.
4, check the pump outlet pipeline is not exhausted the existence of the phenomenon of air.
5, check the pump inlet leak.
2016年12月14日星期三
2016年12月4日星期日
Failure Cause of Turbine Worm Wheel of Submerged Sewage Pump
Turbine oil tank contains more free water. As the worm gear drive by the meshing of the tooth surface to achieve its friction surface must establish the extreme pressure lubricating film, it is the lubricant in the extreme pressure agent and metal surface reaction generated by the lubricating film, which has high strength, can withstand The load produced by the worm gear meshing. Lubricant with water will cause extreme pressure inactivation, the meshing surface can not form a lubricating film, resulting in direct contact with the surface of the worm, causing surface wear. As the worm gear material is tin bronze (code ZQSn10-1), the allowable contact stress is 220MN / m2, while the worm is made of alloy steel (steel: 35CrMo), the allowable contact stress 850MN / m2, relative to the worm worm Soft, so the failure of the form of performance for the worm gear tooth wear.
We carried out a comprehensive analysis of the lubricating oil system, and finally confirmed: the oil system from the steam turbine seal leakage of steam condensate. As the turbine insulation is sealed very well, part of the leakage of steam will inevitably enter the oil seal through the bearing oil system.
In order to solve the problem of worm gear failure caused by oil water, we sampled and analyzed the water content of lubricating oil every month according to the random operation manual of turbine. We regularly drained water from the bottom of the tank and set up the relevant management system.
After the above improvement measures, E-GT501 turbine from October 2000 put into operation, the normal operation has reached more than 2 years, still no signs of damage, for the stable operation of the device provides a strong guarantee, the turbine can balance each year Medium-pressure steam 8,000 tons, the annual energy-saving 15Kw × 8000h = 120000 degrees, 0.6 yuan per degree basis, the annual savings of 72,000 yuan electricity, the economic benefits are obvious.
Due to the lack of the original design gear tooth contact strength, the frequent failure of the turbo-worm gear was changed. By changing the material of the worm wheel, the relevant management system was established according to the requirement and solved the problem. With the increase in the introduction of foreign equipment in China, according to the differences in conditions of the original design conditions for verification, in the process of localization of spare parts should be taken seriously. The solution process of turbine turbine failure problem of liquid sewage pump has certain reference significance
We carried out a comprehensive analysis of the lubricating oil system, and finally confirmed: the oil system from the steam turbine seal leakage of steam condensate. As the turbine insulation is sealed very well, part of the leakage of steam will inevitably enter the oil seal through the bearing oil system.
In order to solve the problem of worm gear failure caused by oil water, we sampled and analyzed the water content of lubricating oil every month according to the random operation manual of turbine. We regularly drained water from the bottom of the tank and set up the relevant management system.
After the above improvement measures, E-GT501 turbine from October 2000 put into operation, the normal operation has reached more than 2 years, still no signs of damage, for the stable operation of the device provides a strong guarantee, the turbine can balance each year Medium-pressure steam 8,000 tons, the annual energy-saving 15Kw × 8000h = 120000 degrees, 0.6 yuan per degree basis, the annual savings of 72,000 yuan electricity, the economic benefits are obvious.
Due to the lack of the original design gear tooth contact strength, the frequent failure of the turbo-worm gear was changed. By changing the material of the worm wheel, the relevant management system was established according to the requirement and solved the problem. With the increase in the introduction of foreign equipment in China, according to the differences in conditions of the original design conditions for verification, in the process of localization of spare parts should be taken seriously. The solution process of turbine turbine failure problem of liquid sewage pump has certain reference significance
Oil Recovery Technology of Submersible Electric Pump
1.1.2 Working principle The pump is installed above the hydraulic packer. The seal pump is used to seal the centrifugal pump, the protector and the motor. Only the sieve pipe and the oil pipe are connected through the packer to communicate with the lower reservoir. Below the packer Of the liquid into the unit through the tubing and sealed tube of the annular space into the suction port, the role of the centrifugal pump out of the wellhead.
1.1.3 Sealing scheme The upper sealing principle As shown, remove the cable sheathing and expose the three wires from the through hole in the sealing flange. The two ends of the wire are covered with sealing rubber, and then on the rubber side and Above were covered with baffle, tighten the wire block, so sealed.
1968-), Shandong Linyi, undergraduate, engineer, mainly engaged in work for the oil field law and order fire and rescue.
The principle of the lower seal as shown, the external use of the guide with the shroud connection, through the thread to seal; internal short section of the screen from the middle hole through the guide device, through the apron with the guide device to seal.
- tubing head production tubing centrifugal pump top seal suction port shroud protector submersible motor sieve seal wire block plug seal pad variable diameter coupling packer tubing rock layer aquifer rock layer out of the oil column matching composition 1.1.4 Performance characteristics Isolation of the upper liquid, to achieve a single bottom of the reservoir exploitation, while the motor and sealed tube between the annular space decreases, speed up the well fluid flow, effectively reduce the motor temperature is conducive to the normal long-term operation of the unit. Has the following characteristics: without affecting the normal work of the pump case, to prevent the upper part of the oil or water pollution caused by the increase in water content; further excavation casing damage potential production to restore the production loss; low cost, easy Operation, but the use of significant results; further enrich and optimize the stratified oil production process, improved oil recovery.
Cable Seal Seal Rubber Seal Flange Top Seal Principle 1 point Seal Flange Schematic Motor-Guide 'Lower Seal Principle 1.2 Job Requirements Shroud Seal Apron Reducing Guide Schematic The program is an increase in the upper part of the shroud (At least more than 24 meters); the installation of a workover rig that is capable of lifting more than 35 meters (at least greater than 24 meters); installation of the workover rigs; The process of the need for shroud installation, cable sealing and cable connection operation, the installation time relative to the general pump longer, in addition to providing the necessary assistance, the well killing and other appropriate security measures; downhole process to control the speed, to prevent bump Cable, damaged seal or shroud.
2.2 The main configuration of the submersible pump technology (4) power cables, transformers, control cabinets, etc. 2.2 size data calculation Shield higher than the pump head 37mm, the next section pump length 5377.7mm, motor length 8248.3mm, protector Length 3406.2mm, the middle shackle 35x2mm shroud, three shrouds (down to page 59) for the general browsing staff to view the download, the background by the relevant management personnel to upload information, through / dismissed, publishing and other operations.
Front - end interface background interface hardware system selection and requirements 2000 operating system and Oracle8i relational database management system.
2000 or Linux operating system and Tomcat5.0 application server.
2000 (XP) operating system, browser IE5.5 and above and Office2000 or above.
Uploading of process resources The integrated process resources are classified, reviewed, modified and uploaded according to the system board.
(3) the application of resource information system and the realization of the function of process information system resources through the installation, testing, commissioning, modification, improvement, to achieve the following functions: (1) resource specific expression function, the different types of process resources (2) to organize and manage the extensive resources systematically; to provide query, retrieval and download of resources; to realize the hierarchical rights management and security control of resources; to pool resources and realize the sharing of resources .
1.1.3 Sealing scheme The upper sealing principle As shown, remove the cable sheathing and expose the three wires from the through hole in the sealing flange. The two ends of the wire are covered with sealing rubber, and then on the rubber side and Above were covered with baffle, tighten the wire block, so sealed.
1968-), Shandong Linyi, undergraduate, engineer, mainly engaged in work for the oil field law and order fire and rescue.
The principle of the lower seal as shown, the external use of the guide with the shroud connection, through the thread to seal; internal short section of the screen from the middle hole through the guide device, through the apron with the guide device to seal.
- tubing head production tubing centrifugal pump top seal suction port shroud protector submersible motor sieve seal wire block plug seal pad variable diameter coupling packer tubing rock layer aquifer rock layer out of the oil column matching composition 1.1.4 Performance characteristics Isolation of the upper liquid, to achieve a single bottom of the reservoir exploitation, while the motor and sealed tube between the annular space decreases, speed up the well fluid flow, effectively reduce the motor temperature is conducive to the normal long-term operation of the unit. Has the following characteristics: without affecting the normal work of the pump case, to prevent the upper part of the oil or water pollution caused by the increase in water content; further excavation casing damage potential production to restore the production loss; low cost, easy Operation, but the use of significant results; further enrich and optimize the stratified oil production process, improved oil recovery.
Cable Seal Seal Rubber Seal Flange Top Seal Principle 1 point Seal Flange Schematic Motor-Guide 'Lower Seal Principle 1.2 Job Requirements Shroud Seal Apron Reducing Guide Schematic The program is an increase in the upper part of the shroud (At least more than 24 meters); the installation of a workover rig that is capable of lifting more than 35 meters (at least greater than 24 meters); installation of the workover rigs; The process of the need for shroud installation, cable sealing and cable connection operation, the installation time relative to the general pump longer, in addition to providing the necessary assistance, the well killing and other appropriate security measures; downhole process to control the speed, to prevent bump Cable, damaged seal or shroud.
2.2 The main configuration of the submersible pump technology (4) power cables, transformers, control cabinets, etc. 2.2 size data calculation Shield higher than the pump head 37mm, the next section pump length 5377.7mm, motor length 8248.3mm, protector Length 3406.2mm, the middle shackle 35x2mm shroud, three shrouds (down to page 59) for the general browsing staff to view the download, the background by the relevant management personnel to upload information, through / dismissed, publishing and other operations.
Front - end interface background interface hardware system selection and requirements 2000 operating system and Oracle8i relational database management system.
2000 or Linux operating system and Tomcat5.0 application server.
2000 (XP) operating system, browser IE5.5 and above and Office2000 or above.
Uploading of process resources The integrated process resources are classified, reviewed, modified and uploaded according to the system board.
(3) the application of resource information system and the realization of the function of process information system resources through the installation, testing, commissioning, modification, improvement, to achieve the following functions: (1) resource specific expression function, the different types of process resources (2) to organize and manage the extensive resources systematically; to provide query, retrieval and download of resources; to realize the hierarchical rights management and security control of resources; to pool resources and realize the sharing of resources .
2016年12月1日星期四
How to reduce the noise of the sewage pump?
Noise is a serious problem in recent years, the community has been concerned but how can not solve the outdoors, ubiquitous noise with you want to walk to the eardrum, Ann quietly will not work, home will be all kinds of noise continue to plague, sewage pump noise is one of the sources. A lot of residential district environment in order to install sewage pump , but the noise is large, many residential tenants are noise of the sewage pump to spiritual pollution, the night is often quarrel can't sleep, children and elderly households is more serious. Therefore, we need to reduce the noise generated by the pump, the specific operation is divided into the following six steps:
1, each unit should be set up a separate foundation to prevent resonance, the pump foundation should be based on the weight of a large, and should be provided with a rubber vibration isolation pad vibration, thereby reducing the vibration noise;
2, the sewage pump suction pipe and outlet pipe should be installed on the flexible rubber joint, flexible rubber pipes of different diameter pipe. The number of base isolated generally each flexible rubber joint insertion loss is 15 20dB to estimate the isolation effect of isolation pipe fittings;
3, the pressure pipe on the installation of water hammer eliminator;
4, the sewage pumping station should not be placed directly on the window window wells;
5, with the sewage pump connected to the pipeline, should support vibration isolation measures, pipeline crossing roof or side walls of the pump should be installed between the casing and the casing pipe filled with non combustible flexible materials;
6, reduce the noise, should give priority to the use of low speed vertical pump.
What are the reasons for the sewage pump of the diesel engine?
1, the water inlet pipe and pump body with air:
(1) before the start of the pump is not filled with enough water, sometimes it looks like the water has been poured from the bleed hole overflow, but did not turn the pump shaft to the air completely discharged, resulting in a little air left in the water pipe or pump body.
(2) in contact with the water pump inlet of the horizontal application of reverse flow direction, fell more than 0.5% slope, connect one end of the highest import pumps, do not completely level. If the upward tilt, will be retained within the inlet air, reduce water pipes and pumps in the vacuum, the impact of water.
(3) pump packing has been used for long-term wear or packing pressed too loose, discharge gap caused by the large amounts of water from filling with the shaft sleeve, the external air gap into the pump from the inside, affected the water.
(4) due to the long-term potential of the water pipe, the pipe wall corrosion appear holes, water pump works, the water continued to decline, when these holes exposed, the air from the hole into the water inlet pipe.
(5) there is a crack in the water inlet pipe bend pipe, the water inlet pipe and the water pump connection in the small gap, it is possible to make the air into the water inlet pipe.
2, pump speed is too low:
(1) human factors. Some users because of original motor damage, may be accompanied by another motor, resulting in a flow of small, low head or even the consequences of Sheung shui.
(2) mechanical failure of the pump itself. Impeller and pump shaft fastening nut loose or pump shaft deformation and bending, resulting in multi impeller, direct friction with the pump body, or bearing damage, it is possible to reduce the pump speed.
(3) power machine maintenance. Motor due to the winding burn, and loss of magnetism, maintenance of the winding turns, wire diameter, wiring method changes, or the failure of the maintenance of the fault is not completely eliminated factors will make the pump speed change.
3, suction process is too large:
Some of the water is deep, some of the surrounding terrain is relatively flat, while ignoring the pump allows suction process, resulting in less water absorption or not the result of water suction. To know that the vacuum degree of the pump suction mouth is limited, the absolute vacuum suction process is about 10 meters high water column, while the pump can not establish an absolute vacuum. And a large vacuum, easy to make the pump water vapor, the pump work. Therefore, the centrifugal pump has its maximum allowable suction process, generally between 8.5 - 3 meters. The installation of the pump can not only facilitate simple drawings.
4, the flow of water in and out of the resistance loss is too large
Some users have been measured, although the water tank or water tower to the vertical distance the water is slightly less than the pump head, but a little water or no water. The reason is that the pipe is too long, the water pipe bends more, the water flow in the pipeline resistance loss is too large. The reason is that the pipe is too long, the water pipe bends more, the water flow in the pipeline resistance loss is too large. Under normal circumstances 90 degrees bend than 120 degrees, the resistance is large, every 90 degrees bend head loss of about 0.5-1 meters, meters per 20 meters of resistance can make the head loss of about 1 meters. In addition, some users are free to pump inlet, outlet pipe diameter, which has a certain impact on the head.
5, the impact of other factors
(1) at the end of valve to open. Is usually set aside a long time due to water pump, valve gasket is stuck, no washer valve may be rust.
(2) filter mesh bottom valve is blocked; or potential water valve at the end of the sludge layer caused by the blockage of the strainer.
(3) impeller wear is serious. Impeller blades have been worn for a long time, which affects the performance of the pump.
(4) gate valve can check valve failure or blockage will cause flow to reduce or even draw no water.
(5) the leakage of the export pipeline will also affect the water extraction.
(1) before the start of the pump is not filled with enough water, sometimes it looks like the water has been poured from the bleed hole overflow, but did not turn the pump shaft to the air completely discharged, resulting in a little air left in the water pipe or pump body.
(2) in contact with the water pump inlet of the horizontal application of reverse flow direction, fell more than 0.5% slope, connect one end of the highest import pumps, do not completely level. If the upward tilt, will be retained within the inlet air, reduce water pipes and pumps in the vacuum, the impact of water.
(3) pump packing has been used for long-term wear or packing pressed too loose, discharge gap caused by the large amounts of water from filling with the shaft sleeve, the external air gap into the pump from the inside, affected the water.
(4) due to the long-term potential of the water pipe, the pipe wall corrosion appear holes, water pump works, the water continued to decline, when these holes exposed, the air from the hole into the water inlet pipe.
(5) there is a crack in the water inlet pipe bend pipe, the water inlet pipe and the water pump connection in the small gap, it is possible to make the air into the water inlet pipe.
2, pump speed is too low:
(1) human factors. Some users because of original motor damage, may be accompanied by another motor, resulting in a flow of small, low head or even the consequences of Sheung shui.
(2) mechanical failure of the pump itself. Impeller and pump shaft fastening nut loose or pump shaft deformation and bending, resulting in multi impeller, direct friction with the pump body, or bearing damage, it is possible to reduce the pump speed.
(3) power machine maintenance. Motor due to the winding burn, and loss of magnetism, maintenance of the winding turns, wire diameter, wiring method changes, or the failure of the maintenance of the fault is not completely eliminated factors will make the pump speed change.
3, suction process is too large:
Some of the water is deep, some of the surrounding terrain is relatively flat, while ignoring the pump allows suction process, resulting in less water absorption or not the result of water suction. To know that the vacuum degree of the pump suction mouth is limited, the absolute vacuum suction process is about 10 meters high water column, while the pump can not establish an absolute vacuum. And a large vacuum, easy to make the pump water vapor, the pump work. Therefore, the centrifugal pump has its maximum allowable suction process, generally between 8.5 - 3 meters. The installation of the pump can not only facilitate simple drawings.
4, the flow of water in and out of the resistance loss is too large
Some users have been measured, although the water tank or water tower to the vertical distance the water is slightly less than the pump head, but a little water or no water. The reason is that the pipe is too long, the water pipe bends more, the water flow in the pipeline resistance loss is too large. The reason is that the pipe is too long, the water pipe bends more, the water flow in the pipeline resistance loss is too large. Under normal circumstances 90 degrees bend than 120 degrees, the resistance is large, every 90 degrees bend head loss of about 0.5-1 meters, meters per 20 meters of resistance can make the head loss of about 1 meters. In addition, some users are free to pump inlet, outlet pipe diameter, which has a certain impact on the head.
5, the impact of other factors
(1) at the end of valve to open. Is usually set aside a long time due to water pump, valve gasket is stuck, no washer valve may be rust.
(2) filter mesh bottom valve is blocked; or potential water valve at the end of the sludge layer caused by the blockage of the strainer.
(3) impeller wear is serious. Impeller blades have been worn for a long time, which affects the performance of the pump.
(4) gate valve can check valve failure or blockage will cause flow to reduce or even draw no water.
(5) the leakage of the export pipeline will also affect the water extraction.
Failure and elimination method of vertical pipeline centrifugal pump
ISG vertical pipeline centrifugal pump, pipeline pump, also known as centrifugal pump, centrifugal pump, single stage centrifugal pump, vertical pump, booster pump, hot water pump, circulating pump, booster pump, using IS type single-stage single suction centrifugal pump performance parameters, a clever combination is designed based on general vertical the pump, and the use of temperature, medium in different ISG derived on the basis of the application of hot water, high temperature corrosion resistant chemical pump, oil pump. The series of products with high efficiency and energy saving, low noise, reliable performance and other advantages, in line with the latest National Machinery Department JB/T53058-93 standard requirements, the product according to the international ISO2858 standard design and manufacture.
ISG type vertical pipeline centrifugal pump barrier and eliminating method:
1.ISG vertical pipeline centrifugal pump installation is reasonable, the normal operation and service life of the pump has a very important influence, so the installation and correction must be carefully carried out.
2 control installation size embedded anchor bolt, make concrete foundation work.
3 to be the basis of cement solidification, the pump is mounted on the basis of the application level of the level of the pump and motor shaft inspection apparatus, such as level is adjusted until the level of application of shim, adjusting properly tighten the foot nut,
4 check the pump rotating parts are stuck rubbing, should strictly check the pump shaft and the motor coaxial, can regulate the thin concentric, finally hand rotation coupling, easy rotation even without rubbing is normal.
5 pump suction and discharge pipeline should have their own support, does not allow the weight of the pipeline directly to bear by the pump, so as not to pump down,
The installation position is higher than the water level (6 pump in the pump suction permitted), at the end of suction line should be installed on the bottom and the discharge pipe arranged on the liquid filling hole or valve, for the pump before starting liquid injection; pump installation position below the surface, in the suction pipe on the press install control valve and filter device, to prevent debris into the pump, filter area should be more than 3-4 times the area of the pipeline.
7 high lift pump in the outlet flow control valve on the outer end of the pipeline should also be installed check valve to prevent sudden stop when the water hammer damage.
8 must ensure that the pump installation height is in line with the pump cavitation margin, and consider the pipeline loss and medium temperature.
ISG type vertical pipeline centrifugal pump barrier and eliminating method:
1.ISG vertical pipeline centrifugal pump installation is reasonable, the normal operation and service life of the pump has a very important influence, so the installation and correction must be carefully carried out.
2 control installation size embedded anchor bolt, make concrete foundation work.
3 to be the basis of cement solidification, the pump is mounted on the basis of the application level of the level of the pump and motor shaft inspection apparatus, such as level is adjusted until the level of application of shim, adjusting properly tighten the foot nut,
4 check the pump rotating parts are stuck rubbing, should strictly check the pump shaft and the motor coaxial, can regulate the thin concentric, finally hand rotation coupling, easy rotation even without rubbing is normal.
5 pump suction and discharge pipeline should have their own support, does not allow the weight of the pipeline directly to bear by the pump, so as not to pump down,
The installation position is higher than the water level (6 pump in the pump suction permitted), at the end of suction line should be installed on the bottom and the discharge pipe arranged on the liquid filling hole or valve, for the pump before starting liquid injection; pump installation position below the surface, in the suction pipe on the press install control valve and filter device, to prevent debris into the pump, filter area should be more than 3-4 times the area of the pipeline.
7 high lift pump in the outlet flow control valve on the outer end of the pipeline should also be installed check valve to prevent sudden stop when the water hammer damage.
8 must ensure that the pump installation height is in line with the pump cavitation margin, and consider the pipeline loss and medium temperature.
2016年11月29日星期二
What are the features and functions of deep well submersible pump?
As the submersible pump use scope is increasing in our country, because of its particularity in the workplace, led to its function and role only have great differences with the submersible pump in general, an important reason for the long-term and stable development of the submersible pump in these different submersible pump, a lot of customers and the function of submersible pump the function of understanding is not enough, then introduces the related content of these two aspects:
Functional characteristics of deep well submersible pump:
1, deep well submersible pump in the middle of the pump and the motor if the additional axial force carrier, its head can be increased to 900m.
2, the motor winding is nylon sheath polyethylene water resistance electromagnetic wire.
3, deep well submersible pump is a single suction multi-stage vertical centrifugal pump, deep well submersible motor for water filled wet, vertical wells with submersible asynchronous motor.
4, motor guide bearing with water lubricated bearings. The motor can withstand no axial force on pump thrust bearing, high lift pump thrust bearing with nickel bearing copper and its grinding of the fan-shaped block, is fierer Perth skateboard imports, under axial force water pump.
5, deep well submersible electric pump, submersible three-phase asynchronous motor and pump two parts. The pump body and the upper part of the motor directly connected with the motor shaft is arranged on the upper end of the seal device is reliable, can effectively prevent the exchange between the motor and the coolant pumping medium, the pump to ensure long-term safe operation.
The function of deep well submersible pump:
Submersible pump for hot water from deep wells, wells and marine extracts, can also be used in rivers, reservoirs, canals and other extraction, and submersible pump can also be used for irrigation and plateau in the drinking water, but also for the city, factories, mines, railways, water supply and drainage site use.
Through the analysis of the features and effect of submersible pump deep well and we can have a clear idea, submersible pump is suitable for deep water submersible pump equipment, with the continuous development of marine areas, the effect will be more and more important, but in the face of fierce market competition, if cannot maintain a product the long-term development and improvement, just place footfall, it will be eliminated by the times, facing the pressure of reality, submersible pump has a foundation in the development, also need to do research and exploration is very much.
Functional characteristics of deep well submersible pump:
1, deep well submersible pump in the middle of the pump and the motor if the additional axial force carrier, its head can be increased to 900m.
2, the motor winding is nylon sheath polyethylene water resistance electromagnetic wire.
3, deep well submersible pump is a single suction multi-stage vertical centrifugal pump, deep well submersible motor for water filled wet, vertical wells with submersible asynchronous motor.
4, motor guide bearing with water lubricated bearings. The motor can withstand no axial force on pump thrust bearing, high lift pump thrust bearing with nickel bearing copper and its grinding of the fan-shaped block, is fierer Perth skateboard imports, under axial force water pump.
5, deep well submersible electric pump, submersible three-phase asynchronous motor and pump two parts. The pump body and the upper part of the motor directly connected with the motor shaft is arranged on the upper end of the seal device is reliable, can effectively prevent the exchange between the motor and the coolant pumping medium, the pump to ensure long-term safe operation.
The function of deep well submersible pump:
Submersible pump for hot water from deep wells, wells and marine extracts, can also be used in rivers, reservoirs, canals and other extraction, and submersible pump can also be used for irrigation and plateau in the drinking water, but also for the city, factories, mines, railways, water supply and drainage site use.
Through the analysis of the features and effect of submersible pump deep well and we can have a clear idea, submersible pump is suitable for deep water submersible pump equipment, with the continuous development of marine areas, the effect will be more and more important, but in the face of fierce market competition, if cannot maintain a product the long-term development and improvement, just place footfall, it will be eliminated by the times, facing the pressure of reality, submersible pump has a foundation in the development, also need to do research and exploration is very much.
2016年11月27日星期日
The importance of optimizing the product and industry structure of submersible sewage pump
At present, China's domestic submersible sewage pump mainly by domestic manufacturers to produce and manufacture, a small part of the product imported from abroad. Market prospect is very broad. However, due to the reliability of submersible sewage pump needs to be strengthened, so to improve the technical content of the product is the main direction of the future development of the company. Submersible sewage pump is widely used in municipal engineering, factories, commercial, hospitals, hotels, residential areas, such as sewage discharge. Because of its simple installation, small floor area, convenient maintenance, no noise and so on,
Submersible sewage pump for the vertical layout, pump and motor axis, which makes the weight of rotating parts and hydraulic impeller exposed to the same direction; secondly, the submersible sewage pump is used in the liquid, the sewage transport medium containing impurities, silt and other substances; third, submersible sewage pump is a centrifugal pump, in when it is running, the power is always increased with increasing flow, when the flow exceeds the design flow and reaches a certain value, the motor will be due to overload and burn. All of the above problems will affect the service life of submersible sewage pump in different degree.
The submersible sewage pump is more suitable for conveying containing solid objects, or fiber cloth and other liquid medium, so don't worry about the pump life caused by environmental factors, the stability is not high, as long as the use of regular maintenance can guarantee the service life.
Submersible sewage pump and has an advantage, completely submerged to drown in the water, can work under water, save water protection measures, can save part of the cost. Area is greatly reduced, does not affect the beauty of the project, this feature has been favored by many enterprises. Submersible sewage pump discharge capacity is very strong, almost no blockage of the situation, the diameter of thirty to eighty mm in the solid can be passed.
In order to make each product to achieve the best results, take full electronic design process, the whole design and improvement on the computer and the further optimization design, more accurate, so the company has strong technical force, the designers also have rich design experience, not only that, in order to ensure Shanghai Kaitai pump a submersible sewage pump are equipped with sophisticated design, reduce the error, using the international advanced production technology and means, strict inspection department, ensure that each product is of high quality and long life quality.
In view of the problems of submersible sewage pump, some domestic manufacturers to focus on the development of pump protection system: automatic alarm or cut off the power supply when the pump is running. While this approach can play a certain effect, but this protection is necessary, but this is not the fundamental way to solve the problem, we need to focus on improving the performance of the pump, to fundamentally solve the problem. Submersible sewage pump in the future need to solve the problem is to improve the use of reliability, can adapt to a variety of working environment, optimize its structural design, and further improve the performance of submersible sewage pump.
Submersible sewage pump for the vertical layout, pump and motor axis, which makes the weight of rotating parts and hydraulic impeller exposed to the same direction; secondly, the submersible sewage pump is used in the liquid, the sewage transport medium containing impurities, silt and other substances; third, submersible sewage pump is a centrifugal pump, in when it is running, the power is always increased with increasing flow, when the flow exceeds the design flow and reaches a certain value, the motor will be due to overload and burn. All of the above problems will affect the service life of submersible sewage pump in different degree.
The submersible sewage pump is more suitable for conveying containing solid objects, or fiber cloth and other liquid medium, so don't worry about the pump life caused by environmental factors, the stability is not high, as long as the use of regular maintenance can guarantee the service life.
Submersible sewage pump and has an advantage, completely submerged to drown in the water, can work under water, save water protection measures, can save part of the cost. Area is greatly reduced, does not affect the beauty of the project, this feature has been favored by many enterprises. Submersible sewage pump discharge capacity is very strong, almost no blockage of the situation, the diameter of thirty to eighty mm in the solid can be passed.
In order to make each product to achieve the best results, take full electronic design process, the whole design and improvement on the computer and the further optimization design, more accurate, so the company has strong technical force, the designers also have rich design experience, not only that, in order to ensure Shanghai Kaitai pump a submersible sewage pump are equipped with sophisticated design, reduce the error, using the international advanced production technology and means, strict inspection department, ensure that each product is of high quality and long life quality.
In view of the problems of submersible sewage pump, some domestic manufacturers to focus on the development of pump protection system: automatic alarm or cut off the power supply when the pump is running. While this approach can play a certain effect, but this protection is necessary, but this is not the fundamental way to solve the problem, we need to focus on improving the performance of the pump, to fundamentally solve the problem. Submersible sewage pump in the future need to solve the problem is to improve the use of reliability, can adapt to a variety of working environment, optimize its structural design, and further improve the performance of submersible sewage pump.
2016年11月24日星期四
Introduction to the regulation method of mine submersible pump
Mine submersible pump is mainly used in coal mine, mine submersible pump used in D type, DA type and TSW type multistage centrifugal pump; and the sump area and local drainage is commonly used type B and type Ba and BZ type single-stage centrifugal pump. With the increase in the scope of use of mine submersible pump, how to adjust the work, which is a lot of people this question, the next will be described in detail:
Introduction to the regulation method of mine submersible pump
Introduction to the regulation method of mine submersible pump
1, can be achieved through the throttle valve:
That is to change the open degree of the mine pump water outlet, the small gate valve, the local resistance of the pipe increases, the pipeline system characteristic curve becomes steep, the pump device's working point will make the corresponding change, the water quantity decreases accordingly. When the valve is closed, the local resistance of the pipe is close to infinity, and the water is cut off. The throttle adjustment method is simple and easy to operate, and is very used in production.
2, by changing the motor speed to change the operating point of the pump device:
Facts have proved that the new technology, new materials, new technology applications, not only the liberation of labor productivity, but also to ensure product quality and stable and reliable. Our country is a big agricultural country, submersible pump as an agricultural water to the irrigation tool into every household. The application of submersible pump in China's industrial field is also increasing. Submersible pump technology in China is still in the development stage, the technology should be further improved.
Speed control operation is refers to the mine submersible pump in variable speed motor drive operation, along with the coal mine problems in the processing of its outstanding performance, more people pay attention to the use of this product in the real production. How to maximize the performance of its use value, the need for manufacturers and customers to do more work and research, as long as the direction of development in the right direction, mine submersible pump will be more beautiful tomorrow.
Introduction to the regulation method of mine submersible pump
Introduction to the regulation method of mine submersible pump
1, can be achieved through the throttle valve:
That is to change the open degree of the mine pump water outlet, the small gate valve, the local resistance of the pipe increases, the pipeline system characteristic curve becomes steep, the pump device's working point will make the corresponding change, the water quantity decreases accordingly. When the valve is closed, the local resistance of the pipe is close to infinity, and the water is cut off. The throttle adjustment method is simple and easy to operate, and is very used in production.
2, by changing the motor speed to change the operating point of the pump device:
Facts have proved that the new technology, new materials, new technology applications, not only the liberation of labor productivity, but also to ensure product quality and stable and reliable. Our country is a big agricultural country, submersible pump as an agricultural water to the irrigation tool into every household. The application of submersible pump in China's industrial field is also increasing. Submersible pump technology in China is still in the development stage, the technology should be further improved.
Speed control operation is refers to the mine submersible pump in variable speed motor drive operation, along with the coal mine problems in the processing of its outstanding performance, more people pay attention to the use of this product in the real production. How to maximize the performance of its use value, the need for manufacturers and customers to do more work and research, as long as the direction of development in the right direction, mine submersible pump will be more beautiful tomorrow.
2016年11月22日星期二
Analysis of mechanical seal leakage of water pump
Analysis on the reason of water pump mechanical seal leakage:
Core tip: water pump mechanical seal leakage fault is one of the most prone to failure of the pump, so the pump mechanical seal is also part of the more critical parts of the pump vulnerable parts.
Pump selection of mechanical seal material must be suitable for liquid medium conveying pump factory, usually are some manufacturers is fluorine rubber mechanical seal NBR mechanical seal, if serious corrosive must choose the PTFE material mechanical seal,
Steps / methods:
1, the installation of mechanical seal tight observation of dynamic and static ring plane, such as severe burning phenomenon, the plane black and deep traces, sealing rubber hardens, loss of elasticity. This phenomenon is due to the installation caused by tight. Solution: adjust mounting height, impeller after installation, use a screwdriver to toggle the spring, there is a strong tension spring, after the reset release, mobile distance to 2-4 mm.
2, mechanical seal leakage of the first kind may be mechanical seal of the dynamic, static ring plane wear and tear, and caused the mechanical seal of the dynamic, static ring plane wear for six reasons.
3 installed over send. To observe the mechanical seal of dynamic and static ring plane, its surface has a thin layer of the scale, be able to wipe the surface, no wear, this is the loss of flexibility and spring assembly caused by bad or axial movement caused by motor.
4, the water quality is poor. Due to poor water quality, containing small particles and medium hydrochloride content high, formation of abrasive wear of the mechanical seal of the plane or surface of the groove of the ring strain ditch phenomenon. Treatment: to improve the water pressure or media, the replacement of mechanical seals.
5, cavitation. Cavitation is mainly produced in hot water pump. The medium is water, the water temperature is too high to produce steam, gas pipeline into the high pump cavity, this part of the gas can not be excluded, resulting in running water, dry grinding machine seal failure, cavitation automatic exhaust valve, replace seal.
6, water shortages caused by running dry mill damage. This phenomenon is more common in valve mounted form inlet pressure, inlet air, air cavity pump, pump boot, high temperature operation of the mechanical seal friction at high speed, can not be cooled, check sealing machine, spring tension, friction surface charred black, rubber hard crack. Treatment methods to exhaust pipe and pump cavity air, the replacement of mechanical seals.
Reason 3 liquid containing particles
Inspection methods: to understand the situation of the liquid (with no debris, such as sand and silt, etc.). Check the pump, observe and inspect the mechanical seal.
Status features: pump seal cavity with debris, or sediment or slag, etc.. Machine sealing damage (liquid pipe damage or static ring, dynamic ring friction surface wear).
Treatment methods: the pump cavity and the sealing cavity with debris, welding slag or sand, etc., will cause damage to the machine, the machine must be replaced.
4 reasons for the selection of the wrong (not in accordance with the requirements of the use of the use of suitable for the use of the machine seal, especially the use of corrosive liquid transport environment).
Inspection methods: a detailed understanding of liquid composition, temperature, corrosion resistance. Check the pump, observe and inspect the mechanical seal.
State characteristic: the deformation, metamorphism and melting of the seal such as the wave grade pipe. Dynamic and static ring friction surface may be grinding flowers (especially the use of a long time, time is not necessarily a short time to wear).
Processing method: according to the temperature of the liquid, the composition, the corrosion to select the suitable condition of the machine seal.
Core tip: water pump mechanical seal leakage fault is one of the most prone to failure of the pump, so the pump mechanical seal is also part of the more critical parts of the pump vulnerable parts.
Pump selection of mechanical seal material must be suitable for liquid medium conveying pump factory, usually are some manufacturers is fluorine rubber mechanical seal NBR mechanical seal, if serious corrosive must choose the PTFE material mechanical seal,
Steps / methods:
1, the installation of mechanical seal tight observation of dynamic and static ring plane, such as severe burning phenomenon, the plane black and deep traces, sealing rubber hardens, loss of elasticity. This phenomenon is due to the installation caused by tight. Solution: adjust mounting height, impeller after installation, use a screwdriver to toggle the spring, there is a strong tension spring, after the reset release, mobile distance to 2-4 mm.
2, mechanical seal leakage of the first kind may be mechanical seal of the dynamic, static ring plane wear and tear, and caused the mechanical seal of the dynamic, static ring plane wear for six reasons.
3 installed over send. To observe the mechanical seal of dynamic and static ring plane, its surface has a thin layer of the scale, be able to wipe the surface, no wear, this is the loss of flexibility and spring assembly caused by bad or axial movement caused by motor.
4, the water quality is poor. Due to poor water quality, containing small particles and medium hydrochloride content high, formation of abrasive wear of the mechanical seal of the plane or surface of the groove of the ring strain ditch phenomenon. Treatment: to improve the water pressure or media, the replacement of mechanical seals.
5, cavitation. Cavitation is mainly produced in hot water pump. The medium is water, the water temperature is too high to produce steam, gas pipeline into the high pump cavity, this part of the gas can not be excluded, resulting in running water, dry grinding machine seal failure, cavitation automatic exhaust valve, replace seal.
6, water shortages caused by running dry mill damage. This phenomenon is more common in valve mounted form inlet pressure, inlet air, air cavity pump, pump boot, high temperature operation of the mechanical seal friction at high speed, can not be cooled, check sealing machine, spring tension, friction surface charred black, rubber hard crack. Treatment methods to exhaust pipe and pump cavity air, the replacement of mechanical seals.
Reason 3 liquid containing particles
Inspection methods: to understand the situation of the liquid (with no debris, such as sand and silt, etc.). Check the pump, observe and inspect the mechanical seal.
Status features: pump seal cavity with debris, or sediment or slag, etc.. Machine sealing damage (liquid pipe damage or static ring, dynamic ring friction surface wear).
Treatment methods: the pump cavity and the sealing cavity with debris, welding slag or sand, etc., will cause damage to the machine, the machine must be replaced.
4 reasons for the selection of the wrong (not in accordance with the requirements of the use of the use of suitable for the use of the machine seal, especially the use of corrosive liquid transport environment).
Inspection methods: a detailed understanding of liquid composition, temperature, corrosion resistance. Check the pump, observe and inspect the mechanical seal.
State characteristic: the deformation, metamorphism and melting of the seal such as the wave grade pipe. Dynamic and static ring friction surface may be grinding flowers (especially the use of a long time, time is not necessarily a short time to wear).
Processing method: according to the temperature of the liquid, the composition, the corrosion to select the suitable condition of the machine seal.
2016年11月20日星期日
2016年11月18日星期五
Application knowledge of submersible sewage pump in engineering application
Submersible sewage pump is a pump and motor connected, and at the same time into the work of the pump liquid products, compared with the general horizontal or vertical sewage pump pump, submersible sewage pump has the following obvious advantages:
1 submersible sewage pump compact structure, small area. The submersible pump into the liquid as a result, it can be directly installed in the sewage pool, without the construction of a dedicated pump pumps and machines used to install, can save a lot of land and infrastructure costs.
2 submersible sewage pump installation and maintenance is convenient. Small submersible sewage pump free installation, large submersible sewage pumps are generally equipped with automatic coupling device can be automatically installed, the installation and maintenance very convenient.
3 continuous running time. Submersible sewage pump because the pump and motor coaxial, short axis, rotating parts of light weight, so the load bearing on the bearing (radial) is relatively small, life expectancy is much longer than the average pump.
4 there is no cavitation damage and irrigation water and other issues. Especially after a little to the operator has brought a lot of convenience.
5 submersible sewage pump vibration noise is small, the motor temperature rise is low, no pollution to the environment.
It is because of these advantages, submersible sewage pump more and more attention has been paid, use the range more widely, from the simply used to transport water to the present can transport all kinds of domestic sewage, industrial waste, construction site drainage, liquid feed and so on. In the municipal engineering, industry, hospitals, construction, hotels, water conservancy construction plays a very important role in all walks of life.
But everything is One divides into two., submersible sewage pump is the most critical problem is the usability problem, because the use of submersible sewage pump occasions in the liquid; transport medium containing solid material mixed liquid; the pump and motor is close; pump for the vertical layout, with the weight of the rotating parts the water pump impeller under water pressure in the same direction. These issues have made the submersible sewage pump in the seal, motor carrying capacity, bearing arrangement and selection, and other aspects of the requirements than the general sewage pump to high.
In order to improve the life of submersible sewage pump, most domestic manufacturers are now in the protection of the pump system to find ways that the occurrence of leakage, overload and over temperature fault in the pump can automatically alarm and automatically shut down equipment repair. But we think, in the submersible sewage pump set protection system is necessary, it can effectively protect the safe operation of the electric pump. But this is not the key to the problem, the protection system is only a remedy after the failure of the pump, is a more passive approach. The key to the problem should be from the fundamental, completely solve the pump in the seal, overload and other aspects of the problem, this is a more proactive approach. For this purpose, we put the Deputy impeller fluid power sealing technology and pump non overload design technology used in submersible sewage pump, a greater increase the pump seal availability and load capacity, extend the service life of the pump.
Application of auxiliary impeller fluid power sealing technology
The so-called hydrodynamic impeller seal Deputy refers to the installation of an open impeller in the opposite direction near the back of the coaxial pump impeller hub. When the pump work, vice impeller with the pump with the rotating spindle, the Deputy impeller with the liquid will rotate, rotation of the liquid will produce an outward centrifugal force, the centrifugal force on the one hand the flow of mechanical seals to withstand the liquid, reducing the mechanical seal pressure. On the other hand, the solid particles in the medium are prevented from entering the friction pair of the mechanical seal, and the wear of the mechanical seal grinding block is reduced, and the service life of the machine is prolonged.
Vice impeller play a role in addition to sealing, but also can reduce the axial force in the submersible sewage pump is mainly in the axial force acting on the impeller on the liquid pressure force and the rotating part of the gravity of the composition, the direction of the two force is the same, efforts are made by the two forces add a. It can be seen that in the case of the same performance parameters, submersible sewage pump axial force than the general horizontal pump to large, and the difficulty of the balance than the vertical pump. So in the submersible sewage pump, the bearings are easy to damage the reason is also a great relationship with the axial force.
And if the installation of the Deputy impeller, the liquid in the impeller pressure on the direction of pressure difference is the two force in the opposite direction, so that it can offset part of the axial force, also played a role in extending the life of the bearing. But with vice impeller seal system also has a drawback, that is to be Deputy impeller part of the energy consumption, generally around 3%, but as long as the design is reasonable, can be reduced to a minimum of this part of the loss.
1 submersible sewage pump compact structure, small area. The submersible pump into the liquid as a result, it can be directly installed in the sewage pool, without the construction of a dedicated pump pumps and machines used to install, can save a lot of land and infrastructure costs.
2 submersible sewage pump installation and maintenance is convenient. Small submersible sewage pump free installation, large submersible sewage pumps are generally equipped with automatic coupling device can be automatically installed, the installation and maintenance very convenient.
3 continuous running time. Submersible sewage pump because the pump and motor coaxial, short axis, rotating parts of light weight, so the load bearing on the bearing (radial) is relatively small, life expectancy is much longer than the average pump.
4 there is no cavitation damage and irrigation water and other issues. Especially after a little to the operator has brought a lot of convenience.
5 submersible sewage pump vibration noise is small, the motor temperature rise is low, no pollution to the environment.
It is because of these advantages, submersible sewage pump more and more attention has been paid, use the range more widely, from the simply used to transport water to the present can transport all kinds of domestic sewage, industrial waste, construction site drainage, liquid feed and so on. In the municipal engineering, industry, hospitals, construction, hotels, water conservancy construction plays a very important role in all walks of life.
But everything is One divides into two., submersible sewage pump is the most critical problem is the usability problem, because the use of submersible sewage pump occasions in the liquid; transport medium containing solid material mixed liquid; the pump and motor is close; pump for the vertical layout, with the weight of the rotating parts the water pump impeller under water pressure in the same direction. These issues have made the submersible sewage pump in the seal, motor carrying capacity, bearing arrangement and selection, and other aspects of the requirements than the general sewage pump to high.
In order to improve the life of submersible sewage pump, most domestic manufacturers are now in the protection of the pump system to find ways that the occurrence of leakage, overload and over temperature fault in the pump can automatically alarm and automatically shut down equipment repair. But we think, in the submersible sewage pump set protection system is necessary, it can effectively protect the safe operation of the electric pump. But this is not the key to the problem, the protection system is only a remedy after the failure of the pump, is a more passive approach. The key to the problem should be from the fundamental, completely solve the pump in the seal, overload and other aspects of the problem, this is a more proactive approach. For this purpose, we put the Deputy impeller fluid power sealing technology and pump non overload design technology used in submersible sewage pump, a greater increase the pump seal availability and load capacity, extend the service life of the pump.
Application of auxiliary impeller fluid power sealing technology
The so-called hydrodynamic impeller seal Deputy refers to the installation of an open impeller in the opposite direction near the back of the coaxial pump impeller hub. When the pump work, vice impeller with the pump with the rotating spindle, the Deputy impeller with the liquid will rotate, rotation of the liquid will produce an outward centrifugal force, the centrifugal force on the one hand the flow of mechanical seals to withstand the liquid, reducing the mechanical seal pressure. On the other hand, the solid particles in the medium are prevented from entering the friction pair of the mechanical seal, and the wear of the mechanical seal grinding block is reduced, and the service life of the machine is prolonged.
Vice impeller play a role in addition to sealing, but also can reduce the axial force in the submersible sewage pump is mainly in the axial force acting on the impeller on the liquid pressure force and the rotating part of the gravity of the composition, the direction of the two force is the same, efforts are made by the two forces add a. It can be seen that in the case of the same performance parameters, submersible sewage pump axial force than the general horizontal pump to large, and the difficulty of the balance than the vertical pump. So in the submersible sewage pump, the bearings are easy to damage the reason is also a great relationship with the axial force.
And if the installation of the Deputy impeller, the liquid in the impeller pressure on the direction of pressure difference is the two force in the opposite direction, so that it can offset part of the axial force, also played a role in extending the life of the bearing. But with vice impeller seal system also has a drawback, that is to be Deputy impeller part of the energy consumption, generally around 3%, but as long as the design is reasonable, can be reduced to a minimum of this part of the loss.
2016年11月16日星期三
Ten characteristics of pipeline sewage pump products
Pipeline sewage pump is divided into stainless steel pipeline sewage pump, cast iron pipeline sewage pump. Can be widely used as a general pipeline pump for high-rise building pressurized water supply, and can be transported with particulate fiber containing sewage.
The pipeline sewage pump used for factory commercialheavily pollutedwaste water, the main residential area of the sewage station, city sewage treatment plant to send water system, air defense system drainage station, tap water plant water supply equipment, hotel, hospital sewage, municipal engineering construction sites, mines completewithmachine, rural biogas pool, farmland irrigation etc. industry, sewage containing particles, dirt, can also be used to clean water and weak corrosive medium.
Product features:
1, using the double blade impeller structure, greatly improving the ability through the dirt
Using a new type of friction sealing 2, mechanical, and long into the oil chamber operation;
3, the whole structure is compact, small size, low noise, energy saving effect is obvious, easy maintenance, convenient user replacement;
4, automatic control cabinet can be based on the required level changes, automatic control of the pump and the end of the stop, no special care, the use of very convenient;
5, according to the user needs to be equipped with installation, it is to the installation, maintenance of the arrival of great convenience, people do not have to enter the sewage pit;
Ten characteristics of pipeline sewage pump products
6, can be used in the design, and ensure that the motor will not overload;
7, the use of large flow channel blocking the design of hydraulic components, greatly improve the dirt through capacity, can effectively through the pump diameter of 5 times the fiber material and diameter of the pump diameter of about 50% of solid particles.
8, pump design is reasonable, reasonable matching motor, high efficiency, energy saving effect is remarkable.
9, mechanical seal with a double end series seal, the material is hard corrosion-resistant tungsten carbide, durable, wear-resistant and other features, can make the pump safe and continuous operation for more than 8000 hours.
10, compact structure, small volume, convenient movement, convenient installation, no need of pump room, dive into the water to work, greatly reduce the project cost.
The pipeline sewage pump used for factory commercialheavily pollutedwaste water, the main residential area of the sewage station, city sewage treatment plant to send water system, air defense system drainage station, tap water plant water supply equipment, hotel, hospital sewage, municipal engineering construction sites, mines completewithmachine, rural biogas pool, farmland irrigation etc. industry, sewage containing particles, dirt, can also be used to clean water and weak corrosive medium.
Product features:
1, using the double blade impeller structure, greatly improving the ability through the dirt
Using a new type of friction sealing 2, mechanical, and long into the oil chamber operation;
3, the whole structure is compact, small size, low noise, energy saving effect is obvious, easy maintenance, convenient user replacement;
4, automatic control cabinet can be based on the required level changes, automatic control of the pump and the end of the stop, no special care, the use of very convenient;
5, according to the user needs to be equipped with installation, it is to the installation, maintenance of the arrival of great convenience, people do not have to enter the sewage pit;
Ten characteristics of pipeline sewage pump products
6, can be used in the design, and ensure that the motor will not overload;
7, the use of large flow channel blocking the design of hydraulic components, greatly improve the dirt through capacity, can effectively through the pump diameter of 5 times the fiber material and diameter of the pump diameter of about 50% of solid particles.
8, pump design is reasonable, reasonable matching motor, high efficiency, energy saving effect is remarkable.
9, mechanical seal with a double end series seal, the material is hard corrosion-resistant tungsten carbide, durable, wear-resistant and other features, can make the pump safe and continuous operation for more than 8000 hours.
10, compact structure, small volume, convenient movement, convenient installation, no need of pump room, dive into the water to work, greatly reduce the project cost.
Vertical sewage pump control procedures
Vertical sewage pump control procedures
The pump is installed in the sludge control room, which is responsible for the distribution of the sludge in the digestion tank.
First, start:
1, starting pump and pump operation, the pool must be more than 2.00M.
2, manual rotation of the pump spindle, the hand sensor is easy, continuous, uniform rotation, no clear graphics card hysteresis vibration.
3, open the mud valve, and open the inlet valve and the valve body of the valve, the valve of the pump body, the internal gas discharge, to the discharge of liquid continuous uniform after closing the two valve.
4, starting motor, observation of current changes and pump start, to reach the required speed after the slowly open the mud valves, and adjust to the conditions of the process requirements.
If the pump body in the process of abnormal vibration or current can not reach the requirements of the situation, it is to stop the pump in a timely manner, to identify the reasons for the exclusion of starting again after.
Vertical sewage pump control procedures
Two start time must be separated by more than 15 minutes.
Two, the operation of the:
Should always pay attention to check the operating conditions of the 1 operators, the pump in operation, such as vibration, noise, abnormal idling should stop the pump check in time. Smooth operation will seriously damage the mechanical seal.
2, try to avoid idling, so as not to damage the rubber bearing, and should avoid long time operation in closed outlet valve case.
Two, parking:
1, closed pump outlet pipe valve and pump inlet pipe valve.
Closed power, stop the operation of the pump.
The pump is installed in the sludge control room, which is responsible for the distribution of the sludge in the digestion tank.
First, start:
1, starting pump and pump operation, the pool must be more than 2.00M.
2, manual rotation of the pump spindle, the hand sensor is easy, continuous, uniform rotation, no clear graphics card hysteresis vibration.
3, open the mud valve, and open the inlet valve and the valve body of the valve, the valve of the pump body, the internal gas discharge, to the discharge of liquid continuous uniform after closing the two valve.
4, starting motor, observation of current changes and pump start, to reach the required speed after the slowly open the mud valves, and adjust to the conditions of the process requirements.
If the pump body in the process of abnormal vibration or current can not reach the requirements of the situation, it is to stop the pump in a timely manner, to identify the reasons for the exclusion of starting again after.
Vertical sewage pump control procedures
Two start time must be separated by more than 15 minutes.
Two, the operation of the:
Should always pay attention to check the operating conditions of the 1 operators, the pump in operation, such as vibration, noise, abnormal idling should stop the pump check in time. Smooth operation will seriously damage the mechanical seal.
2, try to avoid idling, so as not to damage the rubber bearing, and should avoid long time operation in closed outlet valve case.
Two, parking:
1, closed pump outlet pipe valve and pump inlet pipe valve.
Closed power, stop the operation of the pump.
2016年11月15日星期二
Introduction to the basic knowledge of the use of sewage pump and impeller classification
Sewage pump is a kind of non clogging pump, with a variety of forms: such as diving and dry type two, the most common submersible type for WQ type submersible sewage pump, the fiber. Therefore, the pump flow channel is easy to plug, once the pump is blocked will make the pump can not work, and even burning motor, resulting in poor sewage. To urban life and environmental impact of a serious. Therefore, the anti blocking and reliability is an important factor in the quality of the sewage pump.
And other pumps, impeller, water pressure chamber, is the two core components of the sewage pump. Its performance, also on behalf of the pump performance, anti clogging sewage pump performance, efficiency and cavitation performance, anti abrasion performance is mainly composed of vane pump and water pressure chamber to ensure that the two major components. The following are an introduction:
1, the structure of the impeller type: the impeller structure is divided into four categories: blade type (open and closed), cyclone type, channel type, (including single channel and dual channel) spiral centrifugal four open, semi open impeller has the advantages of easy fabrication, when the impeller can cause blockage, easy cleaning and maintenance but, in the long run, the particle abrasion will make the clearance of blade and the side wall of the indoor water pressure increase, thereby reducing efficiency. And the increase of clearance will break the pressure distribution on the blade. Vortex is not only a large amount of losses and the pump will increase the axial force, at the same time, increase the gap, flow in the stability of liquid flow damage to the pump vibration, the impeller type is not easy to transport with large particles and long fibers of the media, from the performance perspective, the type of impeller efficiency is low. The highest efficiency is equivalent to an ordinary closed around 92%, a relatively flat head curve.
2, swirl impeller: the type of impeller pump, due to the impeller part or all of the reduced pressure water chamber. Therefore, no blocking performance, over particle capacity and long fiber through a strong ability. Particles in the pressurized water flow through the impeller rotation of the vortex generated by the promotion of the movement, the suspension of the particle itself does not produce energy, just in the flow channel and liquid exchange energy. In the flow process, the suspended particles or long fibers do not contact with the leaves, leaves the situation much less wear and tear, there is no space because of increased erosion and, in the long run will not cause a serious decline in efficiency, the type of impeller pump used for pumping large particles with the medium and long fibers. From the performance, the efficiency of the impeller is low, only the equivalent of about 70% of the ordinary closed impeller, the head curve is relatively flat.
Introduction to the basic knowledge of the use of sewage pump and impeller classification
3, closed impeller: the type of normal efficiency of the impeller is higher. And in the long run, the situation is relatively stable, the type of impeller pump axial force is small, and can be set on the front and back cover plate. The auxiliary vane on the front cover can reduce the vortex loss of the impeller inlet and the wear of the seal ring. On the back side vane not only play the role of axial force balance, but also can prevent the suspended particles into the cavity of the mechanical seal mechanical seal protection. But the poor non blocking, easy to wound the type of impeller, not in pumping with large particles (long fiber) end after the sewage medium.
4, flow channel type impeller: the impeller is a non blade impeller, the impeller is a flow from the inlet to the outlet of a curved flow. Therefore suitable for pumping large particles and long fibers containing medium. Good blocking resistance. From the performance, the type of impeller efficiency and general closed impeller is not large, but with the type of impeller pump head curve is relatively steep drop. Power curve is relatively stable, it is not easy to generate the problem of super power, but this type of impeller cavitation performance than ordinary closed type impeller, especially suitable for use in the pressure of the pump.
5, screw centrifugal impeller: the impeller of the blade for the twisted spiral blades, in the conical wheel body from the suction port along the axial extension. The impeller of the pump and has a positive displacement pump and centrifugal pump.
In terms of performance, the pump has a steep drop head curve, the power curve is relatively flat.
The most common type of pressure water chamber used in the sewage pump is the spiral case, which is used in the internal installation type submersible pump, which is a guide vane of the radial guide vane or the flow passage type. A spiral, spiral ring and intermediate type three. Basically, the spiral spiral case is not used in the sewage pump. Because the structure is simple and easy to manufacture, the annular pressure water chamber is adopted in a small sewage pump. But the application scope of the annular water pressure chamber in the medium type (semi spiral) pressure water chamber is gradually smaller. Because of high efficiency and an intermediate type pressurized water chamber and a spiral pressure chamber of the high permeability of water. Has increasingly been the focus of manufacturers.
And other pumps, impeller, water pressure chamber, is the two core components of the sewage pump. Its performance, also on behalf of the pump performance, anti clogging sewage pump performance, efficiency and cavitation performance, anti abrasion performance is mainly composed of vane pump and water pressure chamber to ensure that the two major components. The following are an introduction:
1, the structure of the impeller type: the impeller structure is divided into four categories: blade type (open and closed), cyclone type, channel type, (including single channel and dual channel) spiral centrifugal four open, semi open impeller has the advantages of easy fabrication, when the impeller can cause blockage, easy cleaning and maintenance but, in the long run, the particle abrasion will make the clearance of blade and the side wall of the indoor water pressure increase, thereby reducing efficiency. And the increase of clearance will break the pressure distribution on the blade. Vortex is not only a large amount of losses and the pump will increase the axial force, at the same time, increase the gap, flow in the stability of liquid flow damage to the pump vibration, the impeller type is not easy to transport with large particles and long fibers of the media, from the performance perspective, the type of impeller efficiency is low. The highest efficiency is equivalent to an ordinary closed around 92%, a relatively flat head curve.
2, swirl impeller: the type of impeller pump, due to the impeller part or all of the reduced pressure water chamber. Therefore, no blocking performance, over particle capacity and long fiber through a strong ability. Particles in the pressurized water flow through the impeller rotation of the vortex generated by the promotion of the movement, the suspension of the particle itself does not produce energy, just in the flow channel and liquid exchange energy. In the flow process, the suspended particles or long fibers do not contact with the leaves, leaves the situation much less wear and tear, there is no space because of increased erosion and, in the long run will not cause a serious decline in efficiency, the type of impeller pump used for pumping large particles with the medium and long fibers. From the performance, the efficiency of the impeller is low, only the equivalent of about 70% of the ordinary closed impeller, the head curve is relatively flat.
Introduction to the basic knowledge of the use of sewage pump and impeller classification
3, closed impeller: the type of normal efficiency of the impeller is higher. And in the long run, the situation is relatively stable, the type of impeller pump axial force is small, and can be set on the front and back cover plate. The auxiliary vane on the front cover can reduce the vortex loss of the impeller inlet and the wear of the seal ring. On the back side vane not only play the role of axial force balance, but also can prevent the suspended particles into the cavity of the mechanical seal mechanical seal protection. But the poor non blocking, easy to wound the type of impeller, not in pumping with large particles (long fiber) end after the sewage medium.
4, flow channel type impeller: the impeller is a non blade impeller, the impeller is a flow from the inlet to the outlet of a curved flow. Therefore suitable for pumping large particles and long fibers containing medium. Good blocking resistance. From the performance, the type of impeller efficiency and general closed impeller is not large, but with the type of impeller pump head curve is relatively steep drop. Power curve is relatively stable, it is not easy to generate the problem of super power, but this type of impeller cavitation performance than ordinary closed type impeller, especially suitable for use in the pressure of the pump.
5, screw centrifugal impeller: the impeller of the blade for the twisted spiral blades, in the conical wheel body from the suction port along the axial extension. The impeller of the pump and has a positive displacement pump and centrifugal pump.
In terms of performance, the pump has a steep drop head curve, the power curve is relatively flat.
The most common type of pressure water chamber used in the sewage pump is the spiral case, which is used in the internal installation type submersible pump, which is a guide vane of the radial guide vane or the flow passage type. A spiral, spiral ring and intermediate type three. Basically, the spiral spiral case is not used in the sewage pump. Because the structure is simple and easy to manufacture, the annular pressure water chamber is adopted in a small sewage pump. But the application scope of the annular water pressure chamber in the medium type (semi spiral) pressure water chamber is gradually smaller. Because of high efficiency and an intermediate type pressurized water chamber and a spiral pressure chamber of the high permeability of water. Has increasingly been the focus of manufacturers.
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