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一、前言目前有关电灌站设计手册和专业刊物均推荐扬程30米以下的电灌站取消逆止阀。这样可大大降低由于机组突然断电所引起的水锤压力,从而可选用强度较低的压力水管。同时省掉了由于安装逆止阀的投资,降低工程造价。对于扬程稍高的电灌站能否取消逆止阀?事故停泵后直接作用到机组的水锤压力有多大?水锤压力使机组反转的转速有多高?对机组本身是否有损坏?目前尚缺少完整的现场试验资料,为了提供这方面的试验数据,供有关同志参考,作者在栗江电灌站进行了现场试验.
I. INTRODUCTION At present, the design manuals and professional publications of the electric pumping station are all recommended to lift the check valve at the pumping station below 30 meters. This greatly reduces the water hammer pressure caused by the sudden power failure of the unit, so that the pressure water pipe with lower strength can be selected. At the same time saved due to the installation of check valve investment, reduce project costs. For the lift slightly higher electric filling station can cancel the check valve? After the accident stopped the pump directly to the unit water hammer pressure? Water hammer pressure to make the unit reverse speed how high? Whether the unit itself is damaged? At present The lack of complete field test data, in order to provide experimental data in this regard, for the relevant comrades reference, the author conducted a field test in Lijiang electric pumping station.