Water Pump Safety Process and Trouble - shooting
Pump and valve industry is the pump, for liquid delivery. The development of water pump valve industry is closely related to the development of real estate, construction, industry and engineering project industry. In recent years, by a good domestic investment environment and infrastructure construction policies continue to deepen, China's water pump valve machinery industry is developing well. China is an important supplier of pumps, pump exports accounted for about 1/10 of world exports. Of which the United States imports of the whole pump equipment 1/4 from China, imports of pump parts 1/5 from China.
According to industry sources in recent years, China's water pump valve equipment market analysis and investment value of the report, the next 20 years, the world's energy-saving industry investment of about 7.6 trillion US dollars, of which China will account for 40%, nearly 20 trillion yuan . This means that energy-saving environmental protection industry is entering an unprecedented development opportunity. The pump valve fluid machinery as an important part of promoting the development of green low-carbon, Chinese and foreign enterprises will create a good market opportunity.
General measures that the pump can not be started:
First check the power supply situation: whether the connection is solid; switch contact is tight; fuse is blown; three-phase power supply is lack of equality. If open circuit, poor contact, fuse blown, phase, should identify the cause and timely repair. Second, check whether the pump's own mechanical failure, common reasons are: too tight packing or impeller and the pump body is stuck between the clogged debris; pump shaft, bearings, leakage ring rust; pump shaft bending. Exclude: relax packing, dredge diversion tank; open the pump to remove debris, derusting; remove the pump shaft correction or replacement of the new pump shaft.
First, according to the pump installed
1, according to equipment for work
(1) check Bo water pump and motor, sure that in the transport and handling process without damage.
(2) Inspect the tools and hoisting machinery and check the machine foundation.
2, according to the order of the pump
(1) Bosheng pump arrived at the scene, have installed the motor; leveling base, you do not have to remove the pump and motor.
(2) according to the level of the flat surface of the pump application leveling, until the foundation of the cement solidification pump installed on the basis of the level and level with the level of inspection, such as uneven, the horn is adjusted until the level up, and then through the grouting hole Concrete pouring base and anchor bolt hole.
(3) After the cement is dry, check the base and anchor bolts are loose, tighten the anchor bolts after the appropriate nut, and finally check the level of the entire unit, slightly uneven, can be inclined iron leveling.
(4) the pump suction pipe and spit out the pipeline should have their own stent, does not allow the pipe weight directly by the pump to bear.
(5) the direction of rotation of the pump shaft and motor should be consistent, otherwise, to three-phase asynchronous motor as the driving force, as long as the three lead wires in any two position can be connected.
(6) When the position of the pump is higher than the liquid level (within the suction range of the pump), the bottom valve shall be installed at the end of the suction line, and the drain hole or valve shall be set on the drain line for starting Filling liquid. When the pump is installed below the liquid level, install the control valve in the suction line.
(7) pump installed by the height of NPSHr must be based on the requirements of NPSH to avoid cavitation.
3, water pump demolition
(1) Unscrew the drain plug on the suspension body, put the net oil, remove the motor.
(2) release the pump body and the bearing body of the connecting bolt, the impeller, shaft seal body, bearing body and the pump body separation.
(3) loosen the impeller nut, remove the impeller and flat keys.
(4) remove the shaft seal body and seal part of the static ring out of the mechanical seal, packing packing removal of packing to remove the filler packing can be.
(5) from the shaft to remove the mechanical seal of the rotating parts and bushings, packing seal off the sleeve can be.
(6) Remove the bearing body of the bracket and coupling.
(7) Remove the bearing gland, thrown water rubber ring, pump shaft and bearings.
4, pump assembly
4.1, the pump assembly sequence can basically reverse the order in accordance with the demolition. In the installation of mechanical seals should pay attention to several points:
(1) Rubber O-ring whether there is damage, swelling phenomenon, if necessary, must be replaced.
(2) static and dynamic ring surface to maintain absolute clean and apply a small amount of oil.
4.2, packing seal should be noted by the installation:
(1) sleeve bushing is not greater than 0.05mm.
(2) filler interception, the mouth into a 45, and in accordance with the installation before the axis, the size of the filler in a special mold in the top plastic.
(3) packing into the packing chamber, each lap of the lap staggered, in the drive before the need to release the packing gland, gradually pressed after rotation.
Second, pump maintenance and repair
(1) Check the pump and piping and joints with or without loosening. Turn the pump by hand to see if the 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 water pump plug, irrigation diversion (or cited pulp).
(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 pump is running, open the outlet pressure gauge and the import of vacuum pumps, depending on the display of appropriate pressure, and gradually open the gate valve, and check the motor load.
(7) try to control the pump flow and head in the range indicated on the plate to ensure that the pump in the highest efficiency point of operation in order to obtain the greatest energy saving effect.
(8) 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 pump should immediately stop to check the cause.
(10) To stop using the pump, first close the gate valve, pressure gauge, and then stop the motor.
(11) pump in the first month of work, after 100 hours to replace the oil, after each 500 hours, oil change time.
(12) often adjust the packing gland, packing room to ensure the normal drip (in order to drip out into the appropriate).
(13) periodic inspection sleeve wear, wear should be replaced after a large.
(14) pump used in the winter season, after parking, need to pump the lower part of the water plug screw open the media release the net. To prevent cracking.
(15) pump long-term outage, need to pump all apart, dry water, the rotating parts and joints coated with grease installed, and properly preserved.
Pump and valve industry is the pump, for liquid delivery. The development of water pump valve industry is closely related to the development of real estate, construction, industry and engineering project industry. In recent years, by a good domestic investment environment and infrastructure construction policies continue to deepen, China's water pump valve machinery industry is developing well. China is an important supplier of pumps, pump exports accounted for about 1/10 of world exports. Of which the United States imports of the whole pump equipment 1/4 from China, imports of pump parts 1/5 from China.
According to industry sources in recent years, China's water pump valve equipment market analysis and investment value of the report, the next 20 years, the world's energy-saving industry investment of about 7.6 trillion US dollars, of which China will account for 40%, nearly 20 trillion yuan . This means that energy-saving environmental protection industry is entering an unprecedented development opportunity. The pump valve fluid machinery as an important part of promoting the development of green low-carbon, Chinese and foreign enterprises will create a good market opportunity.
General measures that the pump can not be started:
First check the power supply situation: whether the connection is solid; switch contact is tight; fuse is blown; three-phase power supply is lack of equality. If open circuit, poor contact, fuse blown, phase, should identify the cause and timely repair. Second, check whether the pump's own mechanical failure, common reasons are: too tight packing or impeller and the pump body is stuck between the clogged debris; pump shaft, bearings, leakage ring rust; pump shaft bending. Exclude: relax packing, dredge diversion tank; open the pump to remove debris, derusting; remove the pump shaft correction or replacement of the new pump shaft.
First, according to the pump installed
1, according to equipment for work
(1) check Bo water pump and motor, sure that in the transport and handling process without damage.
(2) Inspect the tools and hoisting machinery and check the machine foundation.
2, according to the order of the pump
(1) Bosheng pump arrived at the scene, have installed the motor; leveling base, you do not have to remove the pump and motor.
(2) according to the level of the flat surface of the pump application leveling, until the foundation of the cement solidification pump installed on the basis of the level and level with the level of inspection, such as uneven, the horn is adjusted until the level up, and then through the grouting hole Concrete pouring base and anchor bolt hole.
(3) After the cement is dry, check the base and anchor bolts are loose, tighten the anchor bolts after the appropriate nut, and finally check the level of the entire unit, slightly uneven, can be inclined iron leveling.
(4) the pump suction pipe and spit out the pipeline should have their own stent, does not allow the pipe weight directly by the pump to bear.
(5) the direction of rotation of the pump shaft and motor should be consistent, otherwise, to three-phase asynchronous motor as the driving force, as long as the three lead wires in any two position can be connected.
(6) When the position of the pump is higher than the liquid level (within the suction range of the pump), the bottom valve shall be installed at the end of the suction line, and the drain hole or valve shall be set on the drain line for starting Filling liquid. When the pump is installed below the liquid level, install the control valve in the suction line.
(7) pump installed by the height of NPSHr must be based on the requirements of NPSH to avoid cavitation.
3, water pump demolition
(1) Unscrew the drain plug on the suspension body, put the net oil, remove the motor.
(2) release the pump body and the bearing body of the connecting bolt, the impeller, shaft seal body, bearing body and the pump body separation.
(3) loosen the impeller nut, remove the impeller and flat keys.
(4) remove the shaft seal body and seal part of the static ring out of the mechanical seal, packing packing removal of packing to remove the filler packing can be.
(5) from the shaft to remove the mechanical seal of the rotating parts and bushings, packing seal off the sleeve can be.
(6) Remove the bearing body of the bracket and coupling.
(7) Remove the bearing gland, thrown water rubber ring, pump shaft and bearings.
4, pump assembly
4.1, the pump assembly sequence can basically reverse the order in accordance with the demolition. In the installation of mechanical seals should pay attention to several points:
(1) Rubber O-ring whether there is damage, swelling phenomenon, if necessary, must be replaced.
(2) static and dynamic ring surface to maintain absolute clean and apply a small amount of oil.
4.2, packing seal should be noted by the installation:
(1) sleeve bushing is not greater than 0.05mm.
(2) filler interception, the mouth into a 45, and in accordance with the installation before the axis, the size of the filler in a special mold in the top plastic.
(3) packing into the packing chamber, each lap of the lap staggered, in the drive before the need to release the packing gland, gradually pressed after rotation.
Second, pump maintenance and repair
(1) Check the pump and piping and joints with or without loosening. Turn the pump by hand to see if the 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 water pump plug, irrigation diversion (or cited pulp).
(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 pump is running, open the outlet pressure gauge and the import of vacuum pumps, depending on the display of appropriate pressure, and gradually open the gate valve, and check the motor load.
(7) try to control the pump flow and head in the range indicated on the plate to ensure that the pump in the highest efficiency point of operation in order to obtain the greatest energy saving effect.
(8) 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 pump should immediately stop to check the cause.
(10) To stop using the pump, first close the gate valve, pressure gauge, and then stop the motor.
(11) pump in the first month of work, after 100 hours to replace the oil, after each 500 hours, oil change time.
(12) often adjust the packing gland, packing room to ensure the normal drip (in order to drip out into the appropriate).
(13) periodic inspection sleeve wear, wear should be replaced after a large.
(14) pump used in the winter season, after parking, need to pump the lower part of the water plug screw open the media release the net. To prevent cracking.
(15) pump long-term outage, need to pump all apart, dry water, the rotating parts and joints coated with grease installed, and properly preserved.
Manufacturers recommend: Shenlong fountain submersible pump
Keywords:Pump installation process, troubleshooting, can not start
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