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[CN 201611033731.1] Title of a gas-liquid hybrid press: Application number of a gas-liquid hybrid press: CN 201611033731.1 Applicant: Tianjin Shangji Hydraulic Equipment Co., Ltd. Application Date: 2016-11-21 Patent Type: Invention Application The invention provides a press, including an air-hydraulic cylinder, a hydraulic oil barrel, a cylinder reversing valve, a reversing main valve and a programmable controller. The air-hydraulic cylinder is divided into an upper cylinder and a lower hydraulic cylinder, the upper end cover of the pneumatic cylinder is provided with a first inlet and outlet port, the partition block is provided with a second inlet and outlet port and an oil inlet and outlet port, the lower end cover of the pneumatic cylinder is provided with a third inlet and outlet port, and the cylinder is provided with a first piston, The lower end of the first piston is fixedly connected to the first vertical rod, the lower end of the second piston is fixedly connected to the pressure head after the second vertical rod penetrates through the lower end cover, the first inlet and outlet and the second inlet and outlet are connected with the cylinder reversing valve, the reversing main valve is connected with the third inlet and outlet and the inlet of the hydraulic oil barrel, and the programmable controller is electrically connected with the reversing main valve, the cylinder reversing valve and the switch valve. The invention creates the functions of realizing fast forward, work advance, pressurization, pressure holding and quick recovery.
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