Submersible pump installation precautions Submersible pump is a kind of pump, submersible water work efficient energy-saving water lifting tools. It is small, light weight, compact structure, easy installation and maintenance. With stable performance, continuous operation, reliable, low noise characteristics, and does not pollute the water, environmental protection, pumping efficiency, energy saving, long service life. 1. Installation of submersible pump before installation must first meet the following installation conditions and installation of technical requirements: ①Check the submersible pump is in accordance with the instructions specified in the conditions of use and scope of use. ② Check the well conditions, including well depth, well water, well diameter and the selection of submersible pump to adapt. ③ check wells are clean, well water is turbid, prohibited with submersible pump wash well-pumping water. ④ check the wellhead, the location of the installation of the clamp is appropriate, can withstand the weight of the entire unit. ⑤ check submersible pump parts are complete. ⑥ Check the configuration of the overload protection device and the starting device is compatible with the submersible pump. ⑦ Check the power requirements and the pump nameplate is consistent with the mark. In the installation process should pay attention to the following matters: (1) found during the pump stuck phenomenon to rotate or move the water pipe, to overcome the stuck point, such as various measures are still not effective, do not force the pump, to avoid electricity Pump and well stuck or damaged. (2) When installing each flange on the flange should be put rubber pads and tighten evenly force. (3) According to the quicksand, silt situation of the well to determine the depth of the pump to the bottom of the well, the pump must not be buried in the mud. Pump to the bottom of the distance is generally not less than 3m. (4) The depth of the water into the pump should be less than 1 ~ 1.5m away from the water inlet section. (5) The lift of the pump should not be too low, otherwise, the gate valve should be installed on the wellhead water pipe to control the rated flow point of the pump flow to prevent the motor from being overloaded and burnt due to the excessive flow. 2. After using the pump into normal operation, in order to extend the service life, to regularly check the power supply voltage, operating current and insulation resistance are normal, such as the following should be found immediately shut down to check and troubleshoot. (1) Under rated conditions, the supply voltage is below 10% of normal and the current exceeds 20% of the rated current. (2) motor thermal insulation resistance of less than 0.5 megaohms (usually a weekly inspection). (3) All protective devices, electrical meters and starting equipment are abnormal. (4) water level dropped to the water section, resulting in intermittent water. (5) Submersible pump violent vibration or noise. (6) Motor temperature rise exceeds the rated value 45K. (7) fuse burned one phase. (8) Sump damage. 3. Maintenance and repair For normal and safe operation, to extend the service life of the pump, under normal circumstances, once every six months or 1500 hours after the operation of a small test to check thrust bearings, thrust plate and guide bearing wear is serious, if severe wear and tear should be replaced promptly, Wear light adjustment screw should be properly adjusted to ensure that the proper axial motor channeling amount. Check the pump body rotation is uniform, if the phenomenon of stagnation is required to open the pump body Check the rubber bearings, impeller and seal ring wear, such as serious wear and tear should be replaced parts, reassemble and put into use. After a year or 2500h operation should be carried out a major inspection of all parts for cleaning, descaling, to rust. Check wearing parts wear, severe wear and tear to give replacement. 4. When the submersible pump is not used for a long time, it should be put out of the well and checked and cleaned. After wiping it, it should be stored in a dry and ventilated room; open the drain bolt to discharge the water in the motor chamber (in winter, it should be avoided to freeze the motor) Cable tray wrapped up. Pumps can not be below 0 ℃ indoors; long-term do not have, the surface of the unit and the pipe to be painted or butter rust, pump storage should be placed. 5. Safety Precautions (1) pump before use, the motor chamber must be filled with water, non-dry running is strictly prohibited. (2) In strict accordance with the provisions of the head, the flow range of the use of working conditions to prevent the work in the low lift, high flow overload motor burned. (3) It is forbidden to run the pump under the condition of no water immersion. (4) When the pump is installed and used, it is forbidden to force the cable, and it is not allowed to lift the pump from the wellhead with a cable. (5) motor reversal can not exceed lmin. (6) Configure safety overload, start the protection device, the protection and control performance must meet the product safety control requirements, the capacity must be matched with the pump, non-overload use. (7) electric pump inspection and maintenance, you must first cut off the power, and then enter the homework.
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