A hydraulic valve is arranged at an oil injection port, a valve body of the hydraulic valve is installed at the oil injection port, an oil injection channel is formed in the valve body, a valve element is installed in the oil injection channel in a sealed mode, and an installation opening and an oil inlet hole are formed in the valve element; the valve rod penetrates through the installation opening, a valve clack covering the oil inlet hole is arranged at the end, close to the oil injection opening, of the valve rod, the valve rod is sleeved with the spring, the spring is located between the valve clack and the valve element, and a flow intercepting hole corresponding to the oil inlet hole is formed in the valve clack. According to the anti-explosion hydraulic cylinder for the dock leveler with the optimized design, the anti-explosion hydraulic valve is arranged at the oil injection port, the one-way anti-explosion function is achieved, during oil injection, the valve clack is in the maximum opening and closing state, the oil injection efficiency is not affected, when the load of the hydraulic cylinder is too large, the valve clack can be automatically closed due to the pressure difference, oil can be drained only through small holes in the valve clack, and the anti-explosion function is achieved. And bursting caused by overlarge pressure in the cylinder is avoided, so that collapse of the dock leveler is prevented.

    本发明公开了一种登车桥用防爆液压缸,注油口处设有液压阀,液压阀的阀体安装在所述注油口处且其内部设有注油通道,阀芯密封安装在所述注油通道内,阀芯上设有安装开口和进油孔,阀杆贯穿所述安装开口阀杆靠近所述注油口一端设有覆盖所述进油孔的阀瓣,弹簧套设在阀杆外部且位于阀瓣和阀芯之间,阀瓣上设有与进油孔对应布置的截流孔。通过上述优化设计的登车桥用防爆液压缸,通过注油口处设置防爆液压阀,实现单向防爆功能,注油时,阀瓣呈最大开合状态,不影响注油效率,当液压缸负载过大时,阀瓣由于压差,能够自动关闭,油液仅能通过阀瓣上的小孔进行泄油,避免由于缸内压力过大发生爆裂,从而防止登车桥发生坍塌。


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    Titel :

    Anti-explosion hydraulic cylinder for dock leveler


    Weitere Titelangaben:

    一种登车桥用防爆液压缸


    Beteiligte:
    QIAN CHANGYUN (Autor:in) / TANG KUNRUI (Autor:in)

    Erscheinungsdatum :

    2023-11-03


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    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 / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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