Submersible pump repair and maintenance

Submersible pumps on a regular basis on the submersible pump and its control system for comprehensive maintenance, at least l times a year to do a comprehensive preventive maintenance, including:

    (1) when the vibration of the sound and voltage and current with or without abnormalities; stainless steel multi-level deep well submersible pump

    (2) start the device is working properly;

    (3) whether over-temperature water leakage alarm;

    (4) whether the multi-protection established by the measurement and control is frequent;

    (5) the main cable and control cables are aging and cracking;

    (6) whether the main contactor sticky oxidation or burr;

    (7) thermal relay settings are correct;

    (8) whether the winding insulation signs of aging;

    (9) Insulation resistance to ground is too low;

    (10) three-phase winding resistance is balanced;

    (11) the stator rotor to ask whether there are sweeping or scratches;

    (12) control system level gauge is accurate;

    (13) whether the upper and lower limit output is normal and reliable;

    (14) whether the float action is reliable;

    (15) whether the temperature detection components aging malfunction;

    (16) whether the oil emulsification;

    (17) mechanical seals are intact;

    (18) bearing with or without wear;

    (19) impeller wear or cavitation;

    (20) whether the shaft rust deformation or wear;

    (21) whether the motor inside and outside fastening screw loose;

    (22) cooling jacket and circulating water pipes in the presence of debris;

    (23) whether the pump and the surrounding sediment deposition or blockage.

    In the preventive maintenance and submersible pump operation process, should be correctly distinguish between over-temperature alarm, the alarm is really over-temperature or aging components of the malfunction. In the case of component aging, the signal will only access the alarm signal, not to directly participate in control, to reduce the frequent start of the submersible pump.

    Frequently Asked Questions in Maintenance Work Submersible pumps are immersed in water for long periods of use, causing the aging of the main cable skin to crack. Water penetrates the cable directly into the submersible pump. Therefore, it is necessary to inspect the cables regularly, Cracks, cleaning the surface of the cable after cleaning, waterproof tape can be used for waterproofing, but be careful to soak a few hours after the insulation check with a shake table to meet the requirements before put into operation. Replace the main cable with an insubstantial or non-repairable value. Because the main cable is a watertight connector with a dedicated cable, the replacement price is more expensive, so the process can be used to save costs of bonding.

    In the daily inspection, in addition to full operation control, test instruments, but also to display their subjective active role, as Chinese medicine practitioners to diagnose the disease "look, smell, ask, cut" as abnormal pump abnormalities. "Look" is to see, take a look at the instructions of various ministries pressure, flow, temperature, current, voltage is normal, the pump components have deformation, discoloration, change and whether the leak, with or without plugging; Smell, smell the unusual taste, liquid hydrocarbons, gasoline, benzene and other smells of leakage, equipment, paint, rubber and other insulation burnt paste paste taste; "ask" is to listen, listen to the voice of the rolling sector, with or without Abnormal sound, such as water hammer, friction sound, percussion, vortex sound, breaking sound, etc .; "cut" is to touch, touch whether overheating, vibration and so on. Only in this way the role of the operator, in a variety of test instruments, instruments of assistance, can the daily inspection well, early detection of anomalies, preventive measures.