electro-hydraulic valve actuators system for automatic water hammer protection

摘要

The electrohydraulic valve actuator according to the present invention includes a network control unit for transmitting and receiving an actuator operation status and an operation signal from a long distance, a failure diagnosis unit for determining whether or not a water hammer occurs according to pressure state data during an actuator operation, And a hydraulic pump control unit for control.In addition, it is possible to automatically detect pressure, current, and torque for valve operation during the valve opening operation by the actuator operation to check the occurrence of the water hammer in the pipe, and to control the operation of the actuator by the proportional control method, And a system having a failure diagnosis function of an actuator for confirming the operation performance of the actuator in a step-by-step manner.Accordingly, it is possible to prevent the occurrence of a failure due to the water hammer phenomenon or the like in the piping during the operation of the actuator, and to greatly improve the stability of the piping system by storing the state data.