Butterfly valve, also known as butterfly valve

Butterfly valve, also known as butterfly valve, is a valve device that intercepts water flow by rotating a disc-shaped or double flat plate valve. It is mainly used for pipeline water flow control in hydraulic engineering and hydropower stations [1-3]. Its axis of rotation is perpendicular to the direction of water flow. When closed, the valve plane completely blocks the water flow, and when opened, it is parallel to the water flow to reduce hydraulic losses.
蝶阀，也称为蝶阀，是一种通过旋转圆盘形或双平板阀来截断水流的阀门装置。它主要用于水利工程和水电站的管道水流控制[1-3]。其旋转轴垂直于水流方向。关闭时，阀面完全阻挡水流;打开时，阀面与水流平行，以减少液压损失。
The valve consists of a valve body, a flap, a sealing device, a shaft, and bearings, and adopts rubber band inflatable sealing technology to prevent leakage [1-3]. Suitable for medium to low water heads (up to 200 meters) and large diameter pipelines (up to 8.23 meters), equipped with bypass valves to reduce opening and closing torque, and equipped with air valves and expansion joints to balance air pressure and adapt to installation deformation [1] [3-4]. The operation methods include hydraulic drive (large and medium-sized valves) and electric control (small valves), which have both shut-off and throttling functions, and have the characteristics of simple structure and rapid opening and closing [2] [4]. The design of the double plate valve further optimizes the water resistance and sealing performance [1], but there are limitations such as high head vibration risk and lax closure of the water stop [2-3].
该阀门由阀体、挡板、密封装置、轴和轴承组成，采用橡皮筋充气密封技术以防止泄漏[1-3]。适用于中至低水头（最大200米）和大直径管道（最大8.23米），配备旁通阀以减少开合扭矩，并配备气阀和膨胀节以平衡气压并适应装置变形[1][3-4]。其操作方式包括液压驱动（大中阀）和电动控制（小阀），具备截止和节流功能，具有结构简单、开合快速的特性[2][4]。双板阀的设计进一步优化了防水性和密封性能[1]，但存在诸如高气缸头振动风险和水止阀关闭松懈等限制[2-3]。