1 概述 沿海挡潮排涝闸闸门双向挡水,由于潮位高,所以门体较高,受力很大。但平潮时间短,要求闸门启闭迅速。鉴于此,使挡潮闸的闸门和启闭设备设计难度增大。以前应用较多的是上下扉门配绳鼓启闭机、升卧门配绳鼓启闭机或升卧门配卧式油压启闭机。前两种启闭速度都很慢,且往往泄水孔采用油压启闭机而通航孔不能充分利用油泵等设备。后 1 Overview Coastal tide waterlogging gate two-way water, due to the tide is high, so the door body is high, a lot of force. But the flat tide time is short, requiring gate opening and closing quickly. In view of this, the design of gates and opening and closing devices for tidal gates is made more difficult. Before the application is more up and down the door with rope drum hoist, lifting sleeper rope drum hoist or l horizontal door with horizontal hydraulic hoist. The first two kinds of hoist speed are very slow, and often use hydraulic hoist hydraulic hoist and navigational hole can not make full use of pumps and other equipment. Rear