What should be paid attention to in the use of fire pumps?


 1. Inspection before use

1. Check whether the casing of the submersible pump has cracks, if there are cracks, it cannot be used.
2. Check whether the air vent, water drain hole, oil drain hole and the seal of the cable joint of the submersible pump are loose, and must be tightened if loose. the
3. Check the insulation resistance of the submersible pump. Use a 500V insulation resistance meter to detect that the insulation resistance should not be less than 5MΩ. If it is lower than this value, you should open the water and vent holes, and dry or dry it before using it. the
4. The cable of the submersible pump should not have joints. If there is a joint, it should be wrapped up. The whole cable should not be damaged or broken, otherwise it should be replaced with a new one. In addition, the cable should be overhead and not too long. the
5. Correct the positive and negative poles of the power supply before starting to prevent the water pump from being reversed and no water will come out. the
6. Conduct a comprehensive inspection of the power supply lines and switches before starting the machine, and idling on the ground for 3~5 minutes. If the operation is normal, put it into the water and put it into use. the

2. Matters needing attention in use

1. Different types of submersible pumps should be used according to the specified head, and the inner diameter of the steel pipe, rubber pipe or sail pipe used should meet the technical requirements. the
2. The outlet pipe should not be bent as much as possible, and the rupture of the water pipe should be found and repaired in time to reduce power loss. the
3. When the submersible pump is put into the water or brought out of the water, the rope on the earring must be pulled, and the cable cannot be pulled, otherwise the cable will be damaged. the
4. Submersible pumps cannot pump sewage or water with high sand content, especially submersible pumps with mechanical seals should pay more attention to this point. the
5. The power supply of the submersible pump should be selected according to the regulations. The distance between the power supply and the water pump should not be too far, and the voltage should be within ±10 of the normal value. Be safe. The power supply must be grounded reliably, and a leakage protector must be installed. In addition, try to avoid turning on the power supply when the power supply voltage is too high or too low. If the voltage is too high, the motor will overheat and burn out the winding; capacitor. the
6. The diving depth of the submersible pump is generally 0.5~3m, and it should be lifted vertically, not lying down, let alone sinking into the sand. the
7. The submersible pump should use a circuit breaker as the control device, and a three-pole switch can also be used, but a 6A electric fuse must be installed. the
8. The submersible pump should not be "started" or "stopped" too frequently. After stopping, it should be restarted at an interval of 3 to 5 minutes. Because the current passing through the motor is very large, if it is started frequently, heat will accumulate in the motor and the temperature will rise. It will affect the insulation performance of the winding and cause the winding to burn out. the
9. The submersible pump should not be dehydrated. When pumping water in the pool, attention should be paid to the drop of the water level to prevent the power supply from coming out of the water. The test time on the ground is 3~5min, otherwise the motor will be burnt out. the
10. The submersible pump should be supervised by a special person during work. If any abnormality is found, the power should be cut off immediately and checked. the
11. During the use of the submersible pump, do not wash, swim or put animals into the water nearby to prevent electric shock accidents. If a leakage phenomenon is found, the power supply should be cut off quickly, and the inspection and treatment should be carried out. the
12. When the impeller reverses after the pump is running, it should be stopped immediately, and any two wires of the three-phase core wires should be replaced to make it run normally.
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