Deep well pump installation requirements and inspection:
A diving deep well pump should still make the following inspection:
1. The electrical connector should be immersed in water for 6 hours and measured with a 5000 V shake table. The insulation resistance should not be less than 5 megohms.
2. The flange on the cable to protect the cable, may not have burrs or sharp corners, and should be cleaned;
3. Motor stator windings immersed in water at room temperature for 48 hours, the insulation resistance of the chassis should not be less than 40 megohms.
Two. Deep well pump assembly should meet the following requirements:
1. Assemble pump, water pipe, drive shaft, should be firmly fastened after the connector and gradually into the well, prevent mechanical parts and tools fall into the well, submersible pump cable should be bundled in the Yang pipe;
2. The threaded connection of the water pipes connected to each other, should be added oil, should not fill the hemp, lead oil; pipe end face should be fitted with the bearing bracket (long axis deep well pump) or directly fit, The depth of the pipe should be equal; flange connection Yang pipe, flange end surface should be added gasket;
3. When the pump seat is connected with the lifting pipe and put on the foundation, if the well pipe is slightly deflected, the pump seat should have a corresponding deflection (do not simply correct the level of the pump seat); the gap between the pump seat and the foundation should be Wedge iron fill.
4. Long axis deep well pump should still meet the following requirements:
(1) When the drive shafts are connected to each other, the two shaft end faces should fit, and the two shafts should be screwed into the couplings at the same depth;
(2) Motor and pump seat should be close fit, during which may not be padded, such as the motor shaft and motor hollow shaft is not coaxial, the pump seat and the base should be added to adjust the tilting horn.
5. Diving deep well pump should meet the following requirements:
(1) After the pump and the motor are assembled, the submersible motor shall be filled with clean water through the motor water;
(2) The depth of the submersible in the water should not exceed 70 meters in general. If it is necessary to exceed 70 meters, the stator winding, cables and joints of the motor shall be subjected to the water pressure resistance test.
Three. Pump test operation should be done before the following:
Deep diving pump:
(1) Calculate the voltage drop of the cable, ensure that the voltage at the connector of the submersible motor cable is not lower than the specified value of the submersible motor;
(2) Before each start-up, make the well part of the suction pipe full of air;
(3) Submersible pump should be used within the specified range.
2. Long axis deep well pump;
(1) Adjust the axial clearance between the impeller and the guide shell according to the technical documents of the equipment;
(2) Check whether the non-refundable institution is flexible and reliable;
(3) Before start-up; pre-lubricate the rubber bearings according to the provisions of the technical documents of the equipment.
3. Long-axis deep well pump start 20 minutes after the pump should stop adjusting again between the impeller and the shroud axial clearance.
For submersible pumps that fail to check the motor steering before entering the well, the correct steering of the motor should be determined based on the change of starting current.
The pump shall not be restarted when all the water in the suction pipe has not yet returned to the well. The interval between stopping the pump and restarting the operation shall comply with the provisions of the technical document of the equipment.
Four. Deep well pump in place should make the following checks:
1. In-pipe diameter and non-straightness should be consistent with the pump into the well part of the external dimensions requirements; well pipe diameter should generally be larger than the pump part of the largest dimension of about 50 mm, so that the pump body in the well free up and down, and shall not damage the diving cable;
2. Well pipe mouth out of the corresponding base plane should not be less than 25 mm;
3. Well tube and foundation should be placed soft isolation layer;
4. The size of the hollow center of the base should meet the needs of the connection of the pumping pipe and the pump base;
5. Well tube should be no sludge and dirt, debris;
6. Young pipe should be straight, screw thread and flange end face should not bruise, and should be cleaned;
7. Long axis deep well pump should also make the following inspection:
(1) bearing bracket and rubber bearings should be intact, rubber bearings should not be contaminated with grease;
(2) Deep shaft pump drive shaft end surface should be smooth, the drive shaft at both ends of the support case, the central radial runout should not exceed 0.2 mm; thread should not bruise, and should be cleaned.
A diving deep well pump should still make the following inspection:
1. The electrical connector should be immersed in water for 6 hours and measured with a 5000 V shake table. The insulation resistance should not be less than 5 megohms.
2. The flange on the cable to protect the cable, may not have burrs or sharp corners, and should be cleaned;
3. Motor stator windings immersed in water at room temperature for 48 hours, the insulation resistance of the chassis should not be less than 40 megohms.
Two. Deep well pump assembly should meet the following requirements:
1. Assemble pump, water pipe, drive shaft, should be firmly fastened after the connector and gradually into the well, prevent mechanical parts and tools fall into the well, submersible pump cable should be bundled in the Yang pipe;
2. The threaded connection of the water pipes connected to each other, should be added oil, should not fill the hemp, lead oil; pipe end face should be fitted with the bearing bracket (long axis deep well pump) or directly fit, The depth of the pipe should be equal; flange connection Yang pipe, flange end surface should be added gasket;
3. When the pump seat is connected with the lifting pipe and put on the foundation, if the well pipe is slightly deflected, the pump seat should have a corresponding deflection (do not simply correct the level of the pump seat); the gap between the pump seat and the foundation should be Wedge iron fill.
4. Long axis deep well pump should still meet the following requirements:
(1) When the drive shafts are connected to each other, the two shaft end faces should fit, and the two shafts should be screwed into the couplings at the same depth;
(2) Motor and pump seat should be close fit, during which may not be padded, such as the motor shaft and motor hollow shaft is not coaxial, the pump seat and the base should be added to adjust the tilting horn.
5. Diving deep well pump should meet the following requirements:
(1) After the pump and the motor are assembled, the submersible motor shall be filled with clean water through the motor water;
(2) The depth of the submersible in the water should not exceed 70 meters in general. If it is necessary to exceed 70 meters, the stator winding, cables and joints of the motor shall be subjected to the water pressure resistance test.
Three. Pump test operation should be done before the following:
Deep diving pump:
(1) Calculate the voltage drop of the cable, ensure that the voltage at the connector of the submersible motor cable is not lower than the specified value of the submersible motor;
(2) Before each start-up, make the well part of the suction pipe full of air;
(3) Submersible pump should be used within the specified range.
2. Long axis deep well pump;
(1) Adjust the axial clearance between the impeller and the guide shell according to the technical documents of the equipment;
(2) Check whether the non-refundable institution is flexible and reliable;
(3) Before start-up; pre-lubricate the rubber bearings according to the provisions of the technical documents of the equipment.
3. Long-axis deep well pump start 20 minutes after the pump should stop adjusting again between the impeller and the shroud axial clearance.
For submersible pumps that fail to check the motor steering before entering the well, the correct steering of the motor should be determined based on the change of starting current.
The pump shall not be restarted when all the water in the suction pipe has not yet returned to the well. The interval between stopping the pump and restarting the operation shall comply with the provisions of the technical document of the equipment.
Four. Deep well pump in place should make the following checks:
1. In-pipe diameter and non-straightness should be consistent with the pump into the well part of the external dimensions requirements; well pipe diameter should generally be larger than the pump part of the largest dimension of about 50 mm, so that the pump body in the well free up and down, and shall not damage the diving cable;
2. Well pipe mouth out of the corresponding base plane should not be less than 25 mm;
3. Well tube and foundation should be placed soft isolation layer;
4. The size of the hollow center of the base should meet the needs of the connection of the pumping pipe and the pump base;
5. Well tube should be no sludge and dirt, debris;
6. Young pipe should be straight, screw thread and flange end face should not bruise, and should be cleaned;
7. Long axis deep well pump should also make the following inspection:
(1) bearing bracket and rubber bearings should be intact, rubber bearings should not be contaminated with grease;
(2) Deep shaft pump drive shaft end surface should be smooth, the drive shaft at both ends of the support case, the central radial runout should not exceed 0.2 mm; thread should not bruise, and should be cleaned.