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Submersible pump structural characteristics and conditions of use
Submersible pump structural features: 1, submersible pump device consists of working parts, motors, water pipes, waterproof cables, pump seat, control cabinet and related accessories and other components. 2, the pump is a single suction multi-stage vertical centrifugal pump. 3, submersible motor water-filled wet structure, cavity filled with water for motor cooling and bearing lubrication. In the course of operation due to temperature changes, causing the water pressure within the motor cavity changes, by the motor automatically adjust the voltage regulator. 4, in order to prevent sediment immersed in the motor cavity, equipped with sand thruster and the skeleton oil seal at the upper end of the motor, composed of sand control mechanism, the entire motor seal structure. 5, there is no motor water injection and exhaust holes, the bottom has a drain hole. 6, the lower part of the motor is equipped with thrust bearing and thrust plate, to withstand the residual axial force of the pump and motor rotor weight. 7, the motor stator winding using water-resistant wire, with good insulation and water resistance. Rotor cage structure. 8, heat wells with submersible pump stator winding using high quality cross-linked polyethylene waterproof wire to send it to the media (water) temperature can reach 100 ℃. 9, high-lift special wells with submersible pumps: through the series motor and additional axial force bearing, pump design and application of self-developed axial force balance device. Which shows that the lift can be increased to 1000 meters. Submersible pump conditions of use: First, QS, QJ-type, high-lift special submersible pump 1, the rated frequency of (50 ± 1%) HZ, motor terminal voltage value should be guaranteed in the (380 ± 5%) V of the three-phase AC power. 2, submersible pump must be equipped with overload protection device, the rated current setting value is not allowed to be greater than 1.1 times the rated value of submersible motor current. 3, the motor chamber must be filled with distilled water (or non-corrosive water) 4, deep well diameter of not less than the selected submersible pump frame size, and integrity, smooth. 5, the water inlet of the pump should be immersed at least 1 meter below the water level, the motor immersed in the water level below the second seconds was greater than 70 meters, and the bottom of the motor from the bottom shall not be less than 5 meters. 6, the water temperature is not higher than 20 ℃. 7, the water content of solids (by mass) is not more than 0.01% 8, PH value of water between 6.5 ~ 8.5. 9, hydrogen sulfide content of not more than 1.5mg / L. 10, chloride content of not more than 400mg / L. Second, QJ (R) series wells with heat-resistant submersible pump 1, rated at (50 ± 1%) HZ, the motor voltage should be guaranteed in the (380 ± 5%) V three-phase AC power. 2, submersible pump must be equipped with overload protection device, the rated current setting value is not allowed to be greater than 1.1 times the rated value of submersible motor current. 3, the motor cavity must be filled with distilled water (or non-corrosive water). 4, deep well diameter not less than the selected submersible pump frame size, and is true, smooth. 5, the water inlet pump should be immersed at least 1 meter below the water level, the motor immersed in the hydrostatic level shall not be greater than 70 meters, and the bottom of the motor from the bottom shall not be less than 5 meters. 6, the water temperature is not higher than 100 ℃. 7, the water content of solids (by mass) is not more than 0.01%. 8, PH value of water between 6.5 ~ 8.5. 9, hydrogen sulfide content of not more than 1mg / L. 10, fluoride content of not more than 4mg / L. 11, chloride content in water is not more than 400mg / L. 12, salinity of not more than 4000mg / L. 13, sulfate is not more than 1000mg / L. 14, ammonium ion does not exceed 1mg / L. Third, the QS series submersible pump 1, the rated frequency (50 ± 1%) HZ, the motor voltage should be guaranteed at (380 ± 5%) V of the three-phase AC power. 2, submersible pump must be equipped with overload protection device, the rated current setting value is not allowed to be greater than 1.1 times the rated value of submersible motor current. 3, the motor cavity must be filled with distilled water (or non-corrosive water). 4, electric pump submerged under no more than 5 meters. 5, the water temperature does not exceed 40 ℃. 6, PH value of water between 6.5 ~ 8.5. 7, the volume of solid impurities in the water volume ratio of not more than 0.1%, the particle size of not more than 0.2mm Submersible pump unit installation First, the pre-installation inspection and preparation In addition to meet the conditions of use of submersible electricity, the installation should be done before the following work : 1, check the electric pump assembly is good, fasteners have no loose phenomenon, turn the pump shaft and the motor shaft is uniform and brisk. 2, Open the motor bleed holes and water holes, to the motor lumen filled with water after tightening bleed, water hole plug, after 12 hours at room temperature, with a 500V megger to measure the winding resistance to ground insulation resistance should not be less than 150MΩ , At the same time check whether the leakage of various ministries of the motor. 3, the supporting cable immersed in water at room temperature for 12 hours, with 500V megger to measure the insulation resistance value should not be less than 100MΩ. 4, the motor leads and supporting cables according to the requirements (see instruction manual) well. 5, install the protection switch or start the equipment, start the motor instantaneously (no more than 1 second) to see whether the motor steering and steering signs are the same, if the turn to the contrary, then just swap and power connections any two connector position can be. Note: After the motor and the pump are connected to try the steering, you must inject fresh water from the pump outlet until the water flows out from the pump suction inlet. 6, the new hit deep well after washing and then install the submersible pump. 7, ready to install equipment and tools should be able to lift 3 meters high tripod and can withstand the full weight of the unit lifting facilities, spare parts installation necessary accessories and tools such as wire rope, wrenches, screwdrivers and so on. Second, the installation process and precautions (reference to the drawings) 1, first of all in the pump outlet to install a short water pipe, and then clamp the plywood, hanging fall into the well, the splint fell on the platform. Note: High-lift pump (400 meters) using "iron wire from the motor base to the short hose bundle," the force of protection measures to prevent accidents. 3, and then use a pair of plywood to clamp the next Yang pipe, and the short after the water pipe alignment plus plastic phase and banned. Slightly raised down the crew to remove the previous pair of plywood, the unit down, after a pair of plywood and fell on the platform, in turn, until all the water pipe finished. Note: When lowering the last section of the pumping pipe, put the wellhead cover, the final splint does not fold in the wellhead cover. Then, according to the need to connect elbow,