The invention discloses a rotation combined control valve and a crane rotation control system and method. The problem that an existing crawler crane does not have a free rotation function is solved. The rotation combined control valve comprises a first connector, a second connector, a third connector and a fourth connector, a first reversing valve is arranged between the first connector and the second connector, a second reversing valve is arranged between the third connector and the fourth connector, and a throttling valve and a third reversing valve are arranged between the first connector and the third connector; and the third reversing valve is provided with a first position enabling the first connector and the third connector to be communicated and a second position blocking an oil way between the first connector and the third connector. The rotation combined control valve, and the crane rotation control system and method have the beneficial effects that the free sliding and rotating function of a crawler crane is achieved, the free sliding and rotating speed can be adjusted in a stepless mode through the throttling valve, a hydraulic system is simplified, the integrated design is achieved, meanwhile, a connecting pipeline is simplified, and energy consumption of auxiliary action is reduced through selection of the reversing valves.

    一种回转组合控制阀及起重机回转控制系统及控制方法。解决了现有履带起重机不具备自由回转功能的问题。它包括第一接口、第二接口、第三接口和第四接口,所述的第一接口和第二接口设有第一换向阀,所述的第三接口和第四接口之间设有第二换向阀,所述的第一接口和第三接口之间设有节流阀、第三换向阀,所述的第三换向阀具有使得第一接口、第三接口相连通的第一位置和隔断第一接口、第三接口之间油路的第二位置。本发明的有益效果是,实现了履带起重的自由滑转功能,并且自由滑转速度可以通过节流阀无极调节,简化了液压系统,集成化的设计同时简化了连接管路,换向阀的选用降低了辅助动作能耗。


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    Title :

    Rotation combined control valve, and crane rotation control system and method


    Additional title:

    一种回转组合控制阀及起重机回转控制系统及控制方法


    Contributors:
    JIANG HONG (author) / WANG ZHENSHAN (author) / ZHANG XIHANG (author) / CHEN ZHAOWEN (author) / TANG HONGCAI (author) / ZHU TIANHAO (author) / LI HE (author)

    Publication date :

    2021-07-20


    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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