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排灌用中小型离心泵抽水装置均配帶“三閥”。本文根据:1)当前我国成套供应电动机的功率均大于水泵可能产生的最大軸功率,認为闸閥的主要作用已失去意义;2)排灌用抽水装置水头不高卽使在意外停車过程中产生水住倒流,也不会带來严重不利后果,这样,逆止阀已成多余之物;2)底閥引起的能量損失占比重很大,急待解决等理由,提出用出水管口拍門及吸水管上设气门的办法解决取消“三閥”后遺留的問题。
Drainage with small and medium sized centrifugal pump pumping unit are equipped with “three valves.” This article is based on: 1) At present, the power of complete sets of motor supply in China is greater than the maximum shaft power that may be generated by the pump. It is considered that the main function of the gate valve has lost its meaning. 2) The head of pumping equipment for drainage and irrigation is not high, Water backflow, it will not bring serious adverse consequences, so check valve has become redundant; 2) the energy loss caused by the end valve account for a large proportion of urgent need to be resolved and other reasons, And suction pipe on the way to solve the valve to remove the “three valves” left over from the issue.