The invention belongs to the field of engineering vehicles, and discloses an oil cylinder hydraulic circuit, a vertical supporting leg hydraulic system and an engineering vehicle. The rod cavity working oil way is connected with a rod cavity of the hydraulic oil cylinder and is provided with a first hydraulic locking valve; the rodless cavity working oil way is connected with a rodless cavity of the hydraulic oil cylinder and is provided with a second hydraulic locking valve and a third hydraulic locking valve in series; and the first hydraulic locking valve, the second hydraulic locking valve and the third hydraulic locking valve are respectively selected from hydraulic control one-way valves or balance valves. In the oil cylinder hydraulic loop, at least two hydraulic locking valves are additionally arranged in a rodless cavity working oil way, so that the redundant design of hydraulic locking is achieved. Therefore, when one hydraulic locking valve fails, the redundant locking valve can still be locked, so that the risk caused by failure of a single valve due to clamping stagnation of the hydraulic locking valve is solved, and the safety and reliability of the vertical supporting leg system are greatly improved.

    本发明属于工程车辆领域,公开了一种油缸液压回路、垂直支腿液压系统和工程车辆,所述油缸液压回路包括:液压油缸;有杆腔工作油路,与所述液压油缸的有杆腔相连并设有第一液压锁止阀;无杆腔工作油路,与所述液压油缸的无杆腔相连并串联设置有第二液压锁止阀和第三液压锁止阀;其中,所述第一液压锁止阀、所述第二液压锁止阀和所述第三液压锁止阀分别选自液控单向阀或平衡阀。在本发明的油缸液压回路中,额外在无杆腔工作油路中设置了至少两个液压锁止阀,以实现液压锁止的冗余设计。这样,在一个液压锁止阀失效时,冗余锁止阀仍然可以锁定,从而解决因液压锁止阀卡滞而导致单个阀失效带来的风险,大大提升垂直支腿系统的安全可靠性。


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    Title :

    Oil cylinder hydraulic circuit, vertical supporting leg hydraulic system and engineering vehicle


    Additional title:

    油缸液压回路、垂直支腿液压系统和工程车辆


    Contributors:
    LIU ZHAOHUA (author) / ZENG QINGLI (author) / ZHOU MIN (author)

    Publication date :

    2022-04-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / 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 / B66C Krane , CRANES



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