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[CN 201620878485.9] Pressure regulating device of hydraulic press
[CN 201620878485.9] Title of pressure regulating device for a hydraulic press: Application number of pressure regulating device for a hydraulic press: CN 201620878485.9 Applicant: Jiangsu Guoli Forging Machine Tool Co., Ltd. Application Date: 2016-8-15 Patent Type: Utility Model The utility model relates to a pressure regulating device for a hydraulic press, including a proportional pressure regulating valve, a manual pressure regulating valve and a two-way four-way electromagnetic reversing valve. Port P of the two-way four-way electromagnetic reversing valve is connected to a pressure regulating valve, port T of the two-position four-way electromagnetic reversing valve is connected with the oil tank, port A of the two-position four-way electromagnetic reversing valve is connected with the oil inlet of the manual pressure regulating valve, and the oil outlet of the manual pressure regulating valve is connected with the oil tank; Port B of the two-position four-way electromagnetic reversing valve is connected with the oil inlet of the proportional pressure regulating valve, and the oil outlet of the proportional pressure regulating valve is connected with the oil tank. When the two-position four-way electromagnetic directional valve is in the left station, the pressure is regulated by the manual pressure regulating valve; when the two-position four-way electromagnetic directional valve is in the right station, the pressure is regulated by the proportional pressure regulating valve. At any time through the manual pressure regulation and proportional valve pressure regulation mutual conversion function, can detect whether the machine tool failure caused by the proportional valve, can shorten the machine tool failure downtime maintenance time, reduce the impact on production.
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