双反馈减压阀在龙滩水电站的应用

Application of Double Feedback Pressure Reducing Valve to the Longtan Hydropower Station

龙滩水电站位于广西天峨县境内,距天峨县城15km。工程按正常蓄水位400m设计,按初期蓄水位375m建设。电站初期安装7台单机容量700MW混流式水轮发电机组;后期再安装2台单机容量700MW混流式水轮发电机组。龙滩水电站技术供水、消防供水以及空调供水系统采用双反馈减压阀,该阀门在3个供水系统中都得到了成功的应用,效果明显。为此,对双反馈减压阀的结构特点、工作原理以及调节方法进行介绍。

Longtan Hydropower Station is located in the Tian＇e County of Guangxi, 15 km far from Tian＇e County. It is designed that the normal water level is 400 m but constructed according to the initial water level of 375 m. It is equipped with Francis hydro-generating unit with initial installed capacity of 700MW each and 7 units. Then two single capacity of 700 MW Francis hydro-generating unit will be installed late. The technical water supply, fire water supply and air conditioning water supply system of Long＇tan Hydropower Station adopts double feedback pressure reducing valve, and all the valves in the three water supply systems were successful and gained good effectiveness. For this reason, this paper introduces the structure characteristics, working principle and the method of adjustment of double feedback pressure reducing valve.