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我们曾要求设计一个系统,它能使大跨距两个垂直油缸,通常在一个运渠上升降潜没式分流闸门时同步运行。当闸门全提起时,门顶约停在水面上一英尺许,下面门孔全开。在这个位置时,闸门撇去任何流入渠道的淡水,从而为一个炼镁厂提供丰富的海水。当一个驳船来到时,这个80英尺宽的闸门必须下沉,使驳船从上面通过去,这项工作由两个相距82英尺的油缸来完成。这个系统设计成,使得闸门在最低位置时,活塞全伸出来,闸门始终从同一基准面向上启动。
We had asked for a system to be able to run large spans of two vertical cylinders, usually up and down submerged shunt gates in a single canal. When the gate full lift, the top of the door about stop on the water a foot Xu, the following full hole door. In this position, the gate skims any fresh water that flows into the channel, thus providing a rich smelter with seawater. When a barge arrives, the 80-foot-wide gate must sink to allow the barge to pass over it, which is done by two 82-foot tanks. The system is designed so that when the gate is in the lowest position the piston is fully extended and the gate always starts up from the same reference plane.