The invention relates to the field of engineering machinery, and discloses a hydraulic leveling system and an elevating platform fire fighting truck, the hydraulic leveling system comprises a leveling oil cylinder, a switching control valve, a main reversing valve and a manual leveling mechanism, and the switching control valve is connected with a rod cavity of the leveling oil cylinder through a rod cavity oil way; the switching control valve is connected with a rodless cavity of the leveling oil cylinder through a rodless cavity oil way, the main reversing valve is connected with the switching control valve through a first main working oil way and a second main working oil way, the manual leveling mechanism comprises a manual reversing valve, and the manual reversing valve is connected with the switching control valve through a first auxiliary working oil way and a second auxiliary working oil way; the switching control valve can selectively control the rod cavity oil way and the rodless cavity oil way to correspondingly communicate with the first main working oil way and the second main working oil way or correspondingly communicate with the first auxiliary working oil way and the second auxiliary working oil way. The leveling precision of the leveling oil cylinder is effectively improved.

    本发明涉及工程机械领域,公开了一种液压调平系统和登高平台消防车,液压调平系统包括调平油缸、切换控制阀、主换向阀以及手动调平机构,切换控制阀通过有杆腔油路与调平油缸的有杆腔连接,切换控制阀通过无杆腔油路与调平油缸的无杆腔连接,主换向阀通过第一主工作油路和第二主工作油路与切换控制阀连接,手动调平机构包括手动换向阀,手动换向阀通过第一副工作油路和第二副工作油路与切换控制阀连接;切换控制阀能够选择性地控制有杆腔油路和无杆腔油路分别对应与第一主工作油路和第二主工作油路连通或者分别对应与第一副工作油路和第二副工作油路连通。本发明有效提高调平油缸的调平精度。


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    Title :

    Hydraulic leveling system and elevating platform fire truck


    Additional title:

    液压调平系统和登高平台消防车


    Contributors:
    ZENG LI (author) / LI CHENG (author) / HUANG BIN (author) / JIN YUEKANG (author) / ZENG QINGLI (author)

    Publication date :

    2023-05-30


    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 / A62C FIRE-FIGHTING , Feuerbekämpfung / 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



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