| 摘要 |
A hydraulic control system for a hydraulic valve is provided to reduce the head loss, prevent vibration of the valve body, and to improve operation stability and efficiency of the valve. A hydraulic control system for a hydraulic valve comprises a drive cylinder(3), first and second flow paths(11,12), first and second supply flow paths(13,14), a pressure oil tank(26), a supply pump(25), a solenoid valve(21), a switching valve(22), and a controller(24). The drive cylinder drives the valve body of the hydraulic valve. The first and the second flow path are connected to first and second ports of the drive cylinder. The first and the second flow path join in one side spot of the first and the second flow path. The pressure oil tank is connected to the first and the second flow path. The supply pump supplies the pressure oil to the first and the second flow path from the pressure oil tank. The solenoid valve is an electronic control valve with four ports and three positions where the pressure oil is supplied to the drive cylinder through the first and the second flow path and blocked at the third position, and is connected to the first and the second flow path. The switching valve is an electronic control valve with four ports and two positions, where all the ports are open at the first position and closed at the second position.
|
