Submersible pump is the main equipment for deep well water. Use the entire unit dive into the water operations. The groundwater access to the surface, water is daily, mine rescue, industrial cooling, farm irrigation, submersible pump to improve the sea, ships loaded, but also for the fountain scene, hot water submersible pumps for hot spring bathing, but also for deep well Access to groundwater can also be used for water, reservoirs, drains and other water projects. Mainly used for farmland irrigation and water for human and livestock in high mountains, but also for central air conditioning cooling, heat pump units, pump units, cold pumps, cities, factories, railways, mines, drainage sites. Usually flow can reach (10 cubic meters ~ 650 cubic meters) per hour, head can reach 1,500 meters. So, what are the precautions in the use of submersible pump?
1, can not be grounded
Submersible pump adoption and maintenance of the ground is the national pipeline pump standard requirements. Only need to adopt the maintenance ground, can guarantee personal safety while using. If there is no maintenance of grounding, once the shell leakage, it constitutes the submersible pump water outlet and water pumping live, endangering the safety of humans and animals, while spoiling a lot of electricity. If the submersible pump metal shell and meet the national standard grounding (grounding resistance is not greater than 4Ω) ground connection, when the submersible pump housing leakage, the current through the submersible pump metal shell, ground wire, grounding, earth, transformer operations The ground wire and the power supply form a closed circuit. When the leakage current is too large, especially in front of the husk, the submersible pump maintenance device can operate (fuse blown or air switch tripped), plugging the leakage submersible pump power supply.
2, no leakage maintenance device
Submersible pump operation in the water, easy to leakage constitute the power loss and even cause electric shocks. If equipped with leakage protector, as long as the submersible pump leakage current value exceeds the leakage current protection device (usually does not exceed 30mA), the leakage protection will intercept submersible pump power supply.
3, the power supply voltage abnormal boot
Over-voltage and under-voltage will make the submersible pump temperature is too high, shorten the service life and even burn the submersible pump. Due to the low voltage power supply lines in rural areas, the voltage at the end of the line is too low, the initial voltage is too high. Therefore, during submersible pump operation, it is necessary for the operator to investigate the value of the power supply voltage at any time. If it is less than 10% of the extra voltage, more than 10% of the extra voltage, or more than 20% of the extra current of the submersible pump, That is, stop, and prevent the power supply voltage abnormal boot.
4, the motor rotates in the opposite direction
There are many types of submersible pumps forward and reverse can be effluent, but the rotation of the small amount of water, the current is large, turning a long time will damage the motor windings. Therefore, the submersible pump should be connected to the power supply before the water to see the direction of rotation is not accurate. If the three-phase submersible pump impeller reversed, it should be shut down, interchangeable cable three-phase wire in any two-phase wiring can be.
5, long time overload operation
In order to prevent long-term overload operation of submersible pump, do not use low-lift pump for high-lift work, do not pump water with heavy sediment (heavy mud), and always check whether the current value is within the regulation range. If you find that the current is too large, you should stop watching. In addition, the submersible pump with water as cooling source, therefore, submersible pump dehydration operation should not be too long.
6, frequently switch
Submersible pumps should not be too frequent start, which is due to submersible pump stall occurs when the return, if immediately turn on, the motor load will start, causing the starting current is too large. Thus, after the shutdown to wait for the tube back to the water back to start again, usually around 5min interval requirements.
7, use in the silt environment
Submersible pump in the use of if sunk into the mud, will lead to bad heat and burn the motor windings. Therefore, the submersible pump must not be used in the silt environment. In order to prevent the submerged pump from sinking into the silt, the silt in the working environment should be removed before the submersible pump launches. When necessary, the submersible pump should also be covered with a grid guard to prevent the waste from blocking the water inlet gate. Motor fever, poor water.
8, after stopping for a long time on the water regardless of whether or not to ask
If the submersible pump does not work well after the well, it will rust for a long time, which can not start. Therefore, the disabled submersible pump should not be on the water, regardless of whether it should be switched on once a week, running 5 ~ 10min. When not in use for a long time, the best time is not soaked in water, should be placed in clean water power running for a few minutes, clean the pump surface mud, and then proposed dry surface, a large view, open all the parts for repair, wipe, Rust removal, replacement of wearing parts, and then reassembled, painted rust on the dry, non-corrosive gases in the Treasury.
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