Analysis on the problem of non drainage of deep well pump

1).Before the start of the deep well pump, the water is not filled with enough water, sometimes it seems to be filled with water, but not to turn the pump shaft into the air completely discharged, resulting in a little air left in the water inlet pipe or pump body. 

 

2).Contact with the pump inlet of the horizontal application of reverse flow direction, fell more than 0.5% slope, deep well pump connected at one end of the highest import, not completely level. If the upward tilt, will be retained within the inlet air, reduced water pipes and pump in the vacuum, the impact of water. 

 

3).deep well pump filler has been used for long-term wear or packing pressed too loose, discharge gap caused by the large amounts of water from filling with the shaft sleeve, the result is the outside air into the pump from the internal clearance, affected the water. 

 

4).Due to the long-term potential of the water pipe, pipe wall corrosion of the hole, the water continued to decline after the deep well pump, when exposed to the surface of these holes, the air from the hole into the water inlet pipe. 

 

5).There is a gap between the water inlet pipe and the water inlet pipe and the connection point of the deep well pump, it is possible to make the air enter into the water inlet pipe. 

1).Artificial factors. Some users because of original motor damage, may be accompanied by another motor, resulting in a flow of small, low head or even the consequences of Sheung shui. 

 

2).The mechanical failure of deep well pump. Impeller and pump shaft fastening nut loose or pump shaft deformation and bending, resulting in multi impeller, direct friction with the pump body, or bearing damage, it is possible to reduce the speed of the deep well pump. 

 

3).Power machine repair problems. 

1).At the end of valve to open. Is usually set aside a long time due to the deep well pump, valve gasket is stuck, no washer valve may be rust. 

 

2).Impeller wear is serious. Impeller blades have been worn for a long time, which affects the performance of deep well pump. 

 

3).At the end of the valve filter network is blocked; or potential water valve at the end of the sludge layer caused by the blockage of the strainer. 

 

4).Gate valve can check the failure or blockage will cause the flow to reduce or even draw no water. 

 

5).The leakage of the outlet pipe also affects the amount of water.