无底阀抽水是农业排灌机械上的一项重要技术革新。深受广大贫下中农欢迎,称它是“五省一促机”(省时间、省劳力、省油料或电力、省材料、省费用、促进农业机械化)。目前,我国生产的农用水泵,一般都有底阀。开车前先将水泵灌满引水,将空气挤出泵外,开车后才能不断把水吸上来。一般要三十分钟到一小时才能出水。如遇底阀漏水,坡陡路滑,则所费人力更多,出水时间更长。高扬程泵在突然停车时,由于水锤压力大,易损坏 Bottomless valve pumping is an important technical innovation in agricultural irrigation and drainage machinery. Popular by the poor and middle peasants, it is called “one province, one province, one province” (save time, save labor, save fuel or electricity, save materials, save costs and promote agricultural mechanization). At present, China’s agricultural pumps, generally have the end valve. Before driving the pump filled with water, the air out of the pump, the car can continue to suck water up. Usually thirty minutes to an hour to water. In case of valve leakage at the end, slope steep road slippery, the more labor costs, the water longer. High-lift pump in a sudden stop, due to water hammer pressure, easily damaged