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一、前言 船闸中常用的输水阀门型式有反向弧形阀门和平板阀门二种。反弧阀门的显著优点是启门力小,并且没有阀门门糟,不存在门糟空穴问题。虽然它具有结构复杂,造价高、占闸首长度长和检修困难等缺点,但近年来,在高水头船闸上,尤其是美国几乎都采用了这种门型。平板阀门具有结构简单,经济、检修方便、占闸首长度短等优点,但其启门力大且阀门门糟的空穴问题不易介决,
First, the foreword Commonly used in ship lock valve type reverse arc valve and two kinds of flat-panel valves. A significant advantage of the anti-arc valve is the Kai-door force is small, and there is no valve door bad, there is no door-hole problem. Although it has the shortcomings of complicated structure, high cost, long head length and difficult maintenance, it has been adopted by almost all high-head locks in recent years, especially in the United States. Flat-panel valves have the advantages of simple structure, economy, convenient maintenance and short head length, but their cavities with large door opening and bad valves are not easy to be solved.