When installing the self priming trash pump, first check whether the self-priming pump inlet pipe seal is intact. If there are small holes similar to the small hole of the needle eye, the self-priming pump can not absorb the water, and the self-priming pump inlet pipe is excluded. After leaking, it is still not possible to absorb water. It is necessary to consider how to improve the self-priming performance of the self-priming pump.
First, check the pump shaft, bearing, impeller, seal and other parts of the self-priming pump. The inspection requirements and methods are the same as those of the horizontal centrifugal pump. The difference is the inspection and adjustment of the edge clearance. The self-priming pump can not draw a certain degree of vacuum and maintain a certain self-priming performance. In addition to whether the suction system is tight, whether the pump chamber water volume and medium temperature are appropriate, and whether the rotation speed is sufficient, it mainly depends on the clearance of the impeller mouth edge. size. In the process of use, due to the wear and tear, the gap is too large, which will cause the vacuum and the pumping volume to decrease, and in severe cases, the pumping capacity will be lost. However, if the assembly clearance is too small, it will not only cause the motor to be overloaded, but may even get stuck.
The self-priming effect of self priming trash pump can also be improved by the following methods:
1. The suction pipe end of the suction pump is equipped with a suction bottom valve. The suction bottom valve is actually a check valve, which ensures that the water can only be sucked by the pool suction pipe and cannot be reversed. Therefore, if the suction pipe is filled with water, although the upper water level of the water level of the water tank is elevated, the function of the water suction bottom valve is Water will not flow into the pool, so that the water pipe will be filled with water to ensure that the pump can start automatically and quickly.
The reliability of this water absorption method is affected by the water quality of the bottom valve, such as closed, leaking, the water pipe can be slowly sinking, the time is extended, the water pipe has no water, and the water pump starts to require manual irrigation.
2. The self-priming pump reduces the bending, height and horizontal distance of the intake pipe. Reduce the elbow on the inlet pipe of the self-priming pump. The less the number of elbows, the better. The suction loss of one elbow is about 1 meter.
3. self priming trash pump pump suction box.
This method requires a water tank to be installed in the suction pipe of the pump. Before the pump is operated for the first time, the tank should be filled with water. After the first operation, the height of the water inlet pipe is higher than the height of the pipe surface, although it is lower than the water tank. The water level of the water tank, the water in the water tank will not flow back into the pool, so the water tank can store a certain amount of water. Since the water tank height is lower than the height of the pipe surface, the water pump is filled with water, and the pump is operated again. The water is the drain pump, the negative pressure inside the tank, the water in the pool under the action of atmospheric pressure, the water tank added, and the pool in the pool.
4. The self-priming pump installs the vacuum pump on the suction pipe of the pump. Before the pump starts, the vacuum pump starts, and the pump is filled with water first, so that the pump can start automatically and quickly. This method of pumping requires a sophisticated automatic control system to ensure proper operation.
5, can slightly reduce the diameter of the inlet pipe of the self priming trash pump, such as the 150mm outlet of the pump inlet pipe is 125mm, the inlet pipe can also be used 125mm pipe, the air inside the pipe will be reduced, such as the mouth pipette The large suction pipe for water absorption is definitely not as good as the water absorption effect of the small straw. However, it should be noted that the inlet pipe can only be slightly reduced, and the installation and installation of the large and imported inlets cannot be performed, which may result in the inability to absorb water.