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The following water absorption methods can be used to make up for this deficiency.
The second way to use other water sources to replenish water is to use other water sources to replenish water. It is based on the * water absorption method, install a pipe in front of the water pump outlet check valve, and connect the pipe to the outdoor municipal water supply pipe or other external water source, supply water to the water pump suction pipe, and supplement the bottom valve leakage. The water is dropped to fill the suction pipe with water. The reliability of this water absorption method is affected by the outdoor water source. When the outdoor water source stops for a long time, the water in the suction pipe may leak, so the water pump needs to be artificially filled when starting.
Improvement of the second water absorption method The third way is to improve the second water absorption method, and use the roof water tank to replenish water into the water suction pipe of the water pump. This method is not affected by the water stop of the outdoor water source, and has high reliability. It is suitable for buildings with roof tanks. For buildings without roof tanks, a small water tank can be installed in the pump house to replenish water into the suction pipe of the pump.
The fourth way to set the pump front suction tank is to set the pump front suction tank. In this way, it is necessary to install a water absorption tank on the water suction pipe of the water pump. Before the water pump is operated, the tank should be filled with water manually. After the operation stops, the height of the water inlet pipe of the water absorption tank is higher than the water surface height of the water pipe, even though it is inside the water tank. The height of the water surface is lower than the height of the water surface in the tank, and the water in the tank will not flow back into the pool. Therefore, the water tank can store a certain amount of water, and the water outlet pipe of the water tank (ie, the suction pipe of the water pump) is lower in height. The height of the water in the pipe can ensure that the water suction pipe of the water pump is filled with water. When the water pump is operated again, the water in the water tank is pumped away by the water pump, and the negative pressure is generated in the tank. The water in the water tank is added to the water absorption tank under the action of atmospheric pressure. Inside, through the water tank inside the tank.
The water continuously enters the water pump and is output by the source. The water absorption method has high safety and reliability, but a water absorption tank needs to be provided, and the larger the volume of the suction pipe is, the larger the volume of the water absorption tank is, which not only increases the cost, but also occupies a certain space in the water pump room.
The fifth way to set the vacuum pump on the suction pipe of the water pump is to install a vacuum pump on the suction pipe of the water pump. Before the pump starts, the vacuum pump starts first, so that the water suction pipe of the water pump is filled with water first to ensure the automatic and rapid start of the water pump. This type of water absorption requires a sophisticated automatic control system to ensure that the vacuum pump is started before the pump, and the cost is also high, and the reliability is affected by the automatic control system.
It can be seen from the above analysis that the self-priming water absorption method is safe and reliable. When the self-priming water absorption method cannot be adopted, the water absorption method of the water pump should be selected according to the actual situation of the project, so that it is safe, reliable and economical.
Introduction to improve the water absorption reliability of self-irrigating pumps
Install the suction bottom valve* by installing a suction bottom valve at the end of the suction pipe of the pump. The suction bottom valve is actually a check valve, which ensures that the water flow can only enter the suction pipe from the pool and cannot flow back. Therefore, if the suction pipe is filled with water, although the water pump axis elevation is higher than the working water level of the pool, due to the water absorption bottom The function of the valve, the water in the suction pipe will not flow into the pool, so that the water pipe can be filled with water all the time, ensuring that the pump can start automatically and quickly. The reliability of this water absorption method is affected by the quality of the suction bottom valve. For example, if the closure is not tight and the water leaks, the water in the suction pipe will slowly flow into the pool. After a long time, there is no water in the suction pipe, which causes the water pump to start. Artificial irrigation is required.