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Conditions for automatic control of soft-seal butterfly valve opening
The author: Time:2019/9/29

      软密封蝶阀主要元件有电磁配压阀、电磁空气阀、差动配压阀、四通滑阀、油阀、压力信号器和压力表等。所有这些元件(除油阀外)都集中装在蝶阀控制柜内,控制柜与蝶阀接力器、旁通阀和锁锭之间用管道连接。
      蝶阀在进行开启时应满足下列条件:水轮机导叶处于全关位置,主令开关接点闭合;蝶阀在全关位置,其端接点位置重复继电器的接点闭合;机组无事故,停机继电器未动作;蝶阀关闭继电器KBC未动作。当具备上述条件时,即可发蝶阀开启命令。此命令可由开机继电器发出,也可由机旁操作控制开关ISA发出,还可在现场操作启动按钮。开阀令发出后,蝶阀开启继电器动作,并由闭合而自保持。
 

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