排水管法兰通过螺栓连接到支撑板上，以防止管道张力传递到泵蜗壳上。

The discharge pipe flange is bolted to the support plate to prevent piping strain transmission to the pump volute.

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河床式水电站水头比较低，而单机流量通常较大，这样水电站厂房的进水口、蜗壳和尾水管等尺寸较大。

In general, the head pressure of power station in river channel is lower comparatively, but the unit discharge is always greater, in this way, the dimension of the hydropower house is usually larger.

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