关键词: 液压启闭机, 应急操作, 多台共用, 轮询操作

Abstract: To ensure the stability and reliability of gate opening and closing, a dual hydraulic cylinder configuration is typically used to drive the gate. Synchronizing the two cylinders becomes a critical fac⁃ tor when equipping the emergency actuator for the hoist. In this project, the method is applied that multi⁃ ple hydraulic hoists are able to share a single hydraulic emergency actuator for polling display of open⁃ ing during emergency operation. The emergency actuator is movable and once connected to the hydrau⁃ lic lines and cables, it can automatically identify the hoist number. The synchronized operation of two cylinders to open or close the gate is realized through relay interlocking protection, opening collection signal splitting and other mechanisms. The feasibility of using a single emergency actuator to alternately control three hoists is validated through on-site installation, testing and operation, which meets the ex⁃ pected performance and can offer reference for the emergency operation of similar hydraulic hoists in hy⁃ dropower stations.

Key words: hydraulic hoist, emergency operation, shared use by multiple units, polling operation