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污水泵不能在吸水管下端装置底阀。因为底阀不可能奖闭严密,而且可能被固体污物梗卡而致严重泄漏。除底阀外,备种真空引水方式用于污水泵也较易发生故障,而且不便于自动控制,因此污水泵往往设计成地下式的。然而地下武泵房造价较高,泵房建筑的地下部分防水技术难度较大,采用沉井时封底技术难度也较大,而且泵房内须有抽升漏水的措施,设备安装、运行操作和管理、检修等工作
Sewage pumps must not be equipped with bottom valves at the suction pipe. Because the bottom valve cannot be closed and closed tightly, it may be severely leaked due to solid dirt. In addition to the bottom valve, the preparation of a vacuum pumping method for the sewage pump is also more prone to failure, and is not easy to automatically control, so the sewage pump is often designed as underground type. However, the underground Wu pump house has a relatively high construction cost, and the waterproof technology of the underground part of the pump house construction is relatively difficult. The use of caisson closure technology is also more difficult, and the pump room must have measures for pumping and water leakage, equipment installation, operation and operation. Management, overhaul, etc.