The invention discloses an emergency retraction system for an overhead working truck and a control method, and relates to the field of overhead working platforms, and the emergency retraction system comprises a telescopic hydraulic cylinder, a balance valve, an oil return pipe and a proportional valve. A piston rod used for lifting a load is arranged in the telescopic hydraulic cylinder and divides the interior of the telescopic hydraulic cylinder into a rod cavity and a rodless cavity. An outlet of the balance valve is connected with the rod cavity, an inlet of the balance valve is connected with the rodless cavity, and a control port of the balance valve is connected with an emergency oil source used for controlling the balance valve; the oil return pipe is connected with the rod cavity and used for receiving backflow hydraulic oil. An inlet of the proportional valve is connected with the rodless cavity, and an outlet of the proportional valve is connected with the oil return pipe. According to the invention, the safety of high-altitude operation is effectively improved.

    本发明公开了一种用于高空作业车的紧急缩回系统及控制方法,涉及高空作业平台领域,包括:伸缩液压缸、平衡阀、回油管、比例阀。所述伸缩液压缸内部设有用于举升载荷的活塞杆,所述活塞杆将所述伸缩液压缸内部分隔为有杆腔与无杆腔;所述平衡阀出口与所述有杆腔相连,所述平衡阀入口与所述无杆腔相连,所述平衡阀的控制口连接有用于控制所述平衡阀的应急油源;所述回油管与所述有杆腔相连,用于接收回流的液压油;所述比例阀入口与所述无杆腔相连,所述比例阀出口与所述回油管相连。本发明有效的提高的了高空作业的安全性。


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    Title :

    Emergency retraction system for overhead working truck and control method


    Additional title:

    一种用于高空作业车的紧急缩回系统及控制方法


    Contributors:
    LIU GUOLIANG (author) / SHI WEI (author) / ZHAO JUNBO (author)

    Publication date :

    2022-11-04


    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 / 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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