The invention relates to the technical field of hydraulic jacks, in particular to a hydraulic jack with a safety valve, which comprises an oil storage cylinder, a main cylinder and a pump cylinder, the oil storage cylinder, the main cylinder and the pump cylinder are communicated with one another, an oil pumping piston is arranged in the pump cylinder, a driving handle is arranged on the oil pumping piston, a working piston is arranged in the main cylinder, and a safety valve is arranged on the working piston. An oil filling hole is formed in the side wall surface of the oil storage cylinder, an oil plug is arranged in the oil filling hole, a pressure relief safety valve is arranged at the lower part of the oil storage cylinder, and the pressure relief safety valve is communicated with the main cylinder; one-way valves are arranged at the communication part of the pump cylinder and the main cylinder and the communication part of the pump cylinder and the oil storage cylinder; a maintaining device is arranged in the oil storage cylinder, an oil storage bag is arranged in the position device, and a full filling device is arranged in the oil injection hole. By maintaining the air pressure in the oil cylinder in the jack to be constant, the safety valve is prevented from being mistakenly triggered beyond the design requirement.
本发明涉及液压千斤顶技术领域,具体为一种具有安全阀的液压千斤顶,包括储油缸、主缸和泵缸,所述储油缸、主缸和泵缸相互连通,所述泵缸内设置有泵油活塞,所述泵油活塞上设置有驱动手柄,所述主缸内设置有工作活塞,所述储油缸侧壁面上开设有注油孔,所述注油孔内设置有油塞,所述储油缸的下部设置有泄压安全阀,所述泄压安全阀与主缸连通;所述泵缸与主缸的连通处、泵缸与储油缸的连通处均设置有单向阀;所述储油缸内设置有维持装置,所述位置装置内设置有储油袋,所述注油孔内设置有满灌装置。本发明通过维持千斤顶内的油缸内的气压恒定不变,从而避免安全阀发生设计料想之外的误触发。
Hydraulic jack with safety valve
一种具有安全阀的液压千斤顶
2024-09-13
Patent
Electronic Resource
Chinese
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein |
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