Actuator of accumulator type automatic pressure retaining liquid control buffer valve

The utility model discloses an actuator of an accumulator type automatic pressure retaining liquid control buffer valve, which is composed of a driving mechanism, a hydraulic station, an accumulator mechanism, an electric control system, a hydraulic control valve and a connecting pipe fitting. The utility model has the main mechanism characteristics that the control system uses two electromagnetic valves; a P opening of one of the electromagnetic valves is communicated with an oil passage of the accumulator mechanism, and another two openings are respectively communicated with an oil tank by a regulating valve and communicated with an oil cylinder with a rod cavity by a high-voltage rubber pipe; three openings of the other electromagnetic valve are respectively communicated with the oil passage and the oil tank of the accumulator mechanism, and the oil cylinder without a rod cavity by a one-way valve. The utility model has the advantages of simple oil passage of the control system, small system volume and high reliability, and is suitable for a driving device of partial turning valves.