| 摘要 |
PURPOSE: A hydraulic control system of a hydraulic driving valve is provided to make the installation convenient and to save manufacturing cost. CONSTITUTION: A hydraulic control system of a hydraulic driving valve comprises a drive cylinder(3), a first flow path(11), a second fluid path(12), a first opening/closing valve(53), a supply flow path(13), a supply pump and a hydraulic tank(52). The drive cylinder drives the valve body of the hydraulic driving valve. The first flow path is connected with a first port(3a) of the drive cylinder. The second fluid path has is connected with a second port(3b) of the drive cylinder. The first opening/closing valve is installed on the first flow path. The supply flow path is installed between the first port of the drive cylinder and the first opening/closing valve. The supply pump is installed on the supply flow path. The hydraulic tank is connected with the supply flow path.
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