The invention discloses a proportional valve with a bridge function special for a lorry-mounted crane. A first channel, a shuttle valve, a second channel, a third channel, an LS1 oil way, an LS2 oil way and a throttling valve are arranged in the proportional valve with the bridge function special for the lorry-mounted crane. An opening P is formed in the left side of the proportional valve with the bridge function special for the lorry-mounted crane, and an opening C is formed in the right side of the proportional valve with the bridge function special for the lorry-mounted crane. The proportional valve with the bridge function special for the lorry-mounted crane solves the problems existing at present, and flexible and automatic switching of a getting-on valve and a getting-off valve can be achieved; through flow of a fixed bridge opening, flow matching of the getting-on valve and the getting-off valve is achieved, and meanwhile the flow requirement of the getting-on valve and the getting-off valve is met; when redundant flow exists, the redundant flow directly returns through a three-way flow valve of the getting-on proportional valve, the pressure loss is small, and the system heating amount is low; and when the getting-on valve acts, the getting-off valve cannot act, and the safety of getting-on operation is guaranteed.

    本发明公开了一种随车起重机专用带过桥功能的比例阀,该随车起重机专用带过桥功能的比例阀的内部设有第一通道、梭阀、第二通道、第三通道、LS1油道、LS2油道以及节流阀,该随车起重机专用带过桥功能的比例阀的左侧设有P口,该随车起重机专用带过桥功能的比例阀的右侧设有C口。随车起重机专用带过桥功能的比例阀,解决了目前存在的问题,可实现上车阀和下车阀的灵活、自动的切换;通过固定过桥口的流量,实现了上车阀和下车阀的流量匹配,同时满足上车阀和下车阀的流量需求;在有多余的流量时,多余的流量经上车比例阀的三通流量阀直接回油,压力损失小,系统发热量低;上车阀动作时,下车阀就不能动作,保证了上车操作的安全性。


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    Title :

    Proportional valve with bridge function special for lorry-mounted crane


    Additional title:

    一种随车起重机专用带过桥功能的比例阀


    Contributors:

    Publication date :

    2021-05-25


    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 / B66C Krane , CRANES



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