Deep well pump installation requirements and inspection

Deep well pump installation requirements and inspection: First, diving deep well pump should still make the following inspection: 1 electrical connector should be immersed in water for 6 hours, with 5000 V shake table measurement, the insulation resistance of not less than 5 Megohm; On the blue protective cable groove, there shall be no burr or sharp corners, and should be cleaned; 3 motor stator windings immersed in water at room temperature for 48 hours, the cabinet insulation resistance should not be less than 40 megohms. Second, the deep well pump assembly should meet the following requirements: 1. Assemble the pump, Yang pipe, drive shaft, the fasteners should be fastened and gradually into the well to prevent mechanical parts and tools fall into the well, submersible pump cable Should be bundled in the Yang pipe; 2. Suction pipe connected to the threaded connection should be lubricated, should not fill the hemp, lead oil; pipe end face should be fit with the bearing bracket (long axis deep well pump) or direct paste Together, the depth of the two pipe screwed into the pipe should be equal; flange connection Yang pipe, flange end surface should be added gasket; 3. After the pump seat and the water pipe on the basis of the connection, if the well tube is slightly biased Slant, pump seat should be the appropriate deflection (do not simply correct the level of the pump seat); pump seat and the foundation should be filled with wedge iron. 4. Long axis deep well pump should still meet the following requirements: (1) drive shaft connected to each other, the two shaft end surface should be fit, the two shafts into the coupling depth should be equal; (2) motor and pump seat should be close Fit, in the meantime shall 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. Submersible deep well pump should meet the following requirements: (1) After the pump and motor are assembled, the submersible motor shall be filled with clean water through motor watering; (2) The depth of submergence of the unit should not exceed 70 meters Must be more than 70 meters, the resistance of the stator winding, cables and connectors for hydraulic pressure test. Third, the pump test operation should be done before the following work: 1 diving deep well pump: (1) calculate the voltage drop of the cable should ensure that the submersible motor leads to the voltage at the cable connector is not less than the value of the submersible motor; (2) Before each start, should make the well part of the filling pipe filled with 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 diversion shell according to the technical documents of the equipment; (2) Check if the non-return mechanism is flexible and reliable; (3) Before starting; Technical documents pre-water rubber bearings. 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. Fourth, the deep well pump should be checked in place before the following: 1. Well tube diameter and non-straightness should be consistent with the pump part of the external dimensions requirements; well tube diameter should generally be larger than the pump part of the largest dimension of about 50 mm, so that Pump body in the shaft can be 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; The size of the top should be empty to meet the needs of the connection between the pumping pipe and the pump seat. 5. There should be no sludge, dirt and debris in the pipe. 6. The pipe should be straight, and the thread and flange end face should not bruise, and should be cleaned Clean; 7. Long axis deep well pump should still make the following inspection: (1) bearing bracket and rubber bearings should be intact, the rubber bearings should not be contaminated with grease; (2) deep well pump shaft end should be smooth, shaft at both ends In the case of support, the radial runout in the center should not be greater than 0.2 mm; the threads should not bruise and should be cleansed.

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