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水电站前池采用虹吸进水,在我国已有近二十年的历史。浙江、新疆、青海等省区多有修建。目前国内最大单机容量已达2000千瓦,最大发电水头65米。它的主要特点是进水口为一虹吸管,其顶部装有真空破坏装置,当遇有事故需紧急停机时,只要破坏虹吸即可迅速断流。故可省去快速事故闸门或主阀,具有结构简单、节省投资、运行安全可靠、减少冰冻和泥沙危害等优点。
Hydropower station siphon water pool before, in our country nearly two decades of history. Zhejiang, Xinjiang, Qinghai and other provinces more than the construction. At present, the largest stand-alone capacity has reached 2,000 kilowatts, the maximum generating head of 65 meters. Its main feature is that the water inlet is a siphon pipe. The top of the water inlet is equipped with a vacuum breaking device. When an emergency is required in case of accident, the siphon can be rapidly shut down as long as the siphon is destroyed. Therefore, the quick accident gate or main valve can be omitted, which has the advantages of simple structure, investment saving, safe and reliable operation, reduction of dangers of freezing and sediment, and the like.