The invention discloses an emergency valve, a hydraulic system and engineering machinery. An oil port 1 of a main overflow valve is connected with an oil port P, and an oil port 2 of the main overflow valve is connected with an oil port T; the oil port P is connected with the oil port C, the oil port 1 of the sequence valve is connected to an oil way between the oil port P and the oil port C, the oil port 2 is connected with the oil port D, and the oil port 3 is connected with the oil port T; an oil port 2 of the pressure buildup switch is connected with an oil port P and an oil inlet of the hand-operated direction valve, and an oil port 1 of the pressure buildup switch is connected with an oil port T; an oil outlet of the manual reversing valve is respectively connected with the oil port A and the oil port B; an oil port 1 of the pressure reducing valve is connected with an oil port X, an oil port 2 of the pressure reducing valve is connected with an oil port 2 of the shuttle valve, an oil port 3 of the pressure reducing valve is connected with an oil port T, the oil port 1 of the shuttle valve is connected to an oil way between an oil outlet of the hand-operated direction valve and an oil port A, and the oil port 3 of the shuttle valve is connected to an oil way between the oil outlet of the hand-operated direction valve and an oil port B; according to the invention, after an upper vehicle power system fails, the crane can realize full-action emergency and emergency collection.

    本发明公开一种应急阀、液压系统及工程机械,其包括主溢流阀的油口1与油口P连接,油口2与油口T连接;油口P与油口C连接,顺序阀的油口1连接在油口P与油口C之间的油路上,油口2与油口D连接,油口3与油口T连接;建压开关的油口2与油口P、手动换向阀进油口连接,建压开关的油口1与油口T连接;手动换向阀的出油口分别与油口A和油口B连接;减压阀的油口1与油口X连接,油口2与梭阀的油口2连接,油口3与油口T连接,梭阀的油口1连接在手动换向阀的出油口与油口A之间的油路上,梭阀的油口3连接在手动换向阀的出油口与油口B之间的油路上;本发明实现在上车动力系统失效后,起重机能够实现全动作应急并紧急收车。


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    Title :

    Emergency valve, hydraulic system and engineering machinery


    Additional title:

    一种应急阀、液压系统及工程机械


    Contributors:
    LI BO (author) / JIAO GUOWANG (author) / YANG XIAOXIONG (author) / DAI SHIYU (author)

    Publication date :

    2025-03-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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



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