由于地下水位下降,不少离心泵换成了深井泵。但由于选择不当,出现了装不进去、出水不足、抽不上水来,甚至将机井损坏等问题。怎样选呢? 1.水泵的最大外径(泵体部分)要小于井管内径25～50毫米。如井管歪斜则泵的最大外径还应小些,小多少要通过试验(用长铁筒)决定。装好后,泵体部分不能紧靠井管内壁,以防泵工作时的振动将井管碰撞损坏。 Due to the decline of groundwater level, many centrifugal pumps have been replaced by deep well pumps. However, due to improper choice, there has been installed into the water out of shortage, pumping to the water, or even damaged wells and other issues. How to choose it? 1. The maximum outer diameter of the pump (pump body part) is less than the inner diameter of the well pipe 25 ~ 50 mm. If the well tube crooked the maximum diameter of the pump should also be smaller, much smaller to pass the test (with long iron tube) decision. Installed, the pump body part can not close the well wall, to prevent the vibration of the pump work well tube collision damage.