Precautions for normal use of submersible pumps
When the submersible pump is in normal use, you need to pay attention to multiple aspects to ensure its safe and efficient operation. The following are detailed precautions:
1. Inspection before use
Check the casing: Make sure that the casing of the submersible pump has no cracks. If there are cracks, it cannot be used to prevent leakage or structural damage.
Check the holes: Check whether the seals at the vent hole, water drain hole, oil drain hole and cable joint are loose. If they are loose, they must be tightened to prevent water seepage or leakage.
Insulation resistance detection: Use a 500V insulation resistance meter to detect the insulation resistance of the submersible pump, and its value should not be less than 5MΩ. If it is lower than this value, the water and air holes should be opened, and then dried or dried before use.
Cable inspection: It is best not to have joints on the cable. If there are joints, they should be wrapped to ensure that there is no damage or breakage. The cable should be overhead to avoid being too long and contacting with sharp objects.
Power supply correction: Correct the positive and negative poles of the power supply before starting to prevent the water pump from reversing and causing no water.
Idle test: Before starting the machine, conduct a comprehensive inspection of the power supply line and switch, and power it on and idle it for 3 to 5 minutes on the ground. If it runs normally, put it into the water for use.
2. Precautions during use
Use according to the specified head: Different types of submersible pumps should be used according to the specified head, and the inner diameter of the pipe used should meet the technical requirements.
Protect the cable: When the submersible pump is placed in the water or raised to the surface, the rope on the earring must be pulled, and the cable must not be pulled to avoid damaging the cable.
Water quality requirements: Submersible pumps cannot pump sewage or water with a large amount of sand, especially submersible pumps with mechanical seals.
Power supply voltage stability: The power supply voltage should be within ±10% of the normal value. Avoid starting the machine when the voltage is too high or too low to prevent damage to the motor.
Diving depth and position: The submersible pump should be lifted vertically, and the diving depth is generally 0.5~3m. It cannot lie horizontally or sink into mud and sand to avoid affecting heat dissipation and causing damage.
Special person supervision: The submersible pump should be supervised by a special person during work, and the power should be turned off and checked immediately if any abnormality is found.
Safety warning: Do not wash things, swim or put livestock into the water nearby during use to prevent electric shock accidents.
Avoid frequent starting: The submersible pump should not be "started" or "stopped" too frequently. After stopping, it should be restarted after a period of time (such as 5 minutes) to reduce the impact of the starting current on the motor.
III. Maintenance and care
Check the seals regularly: Before and after each use, check whether the various seals of the submersible pump are loose or damaged, and tighten or replace them in time.
Replace lubricating oil: Regularly replace lubricating oil or engine oil according to the type and use time of the submersible pump to ensure good lubrication.
Rust removal and rust prevention: The submersible pump should be rust-free after one year of use, and a layer of anti-rust paint should be applied for protection.
Comprehensive inspection: The submersible pump should be fully inspected after every two years of use, and all parts should be disassembled for cleaning, lubrication and reassembly.
Storage and maintenance: Submersible pumps that have not been used for a long time should be lifted to the ground to wipe off water stains and stored in a dry and ventilated room to avoid immersion in water.
