The invention discloses an accurate lifting rig for a travelling crane. The accurate lifting rig comprises an accurate lifting rig cylinder for the travelling crane, an upper end cover, a piston rod, a piston, a lower end cover, a hydraulic control one-way valve, a first one-way speed regulating valve, a second one-way speed regulating valve, an electromagnetic directional valve, an overflow valve, an oil pump and an oil tank. The accurate lifting rig for the travelling crane is loaded on the basis of a common travelling crane, the flow state of liquid inside the accurate lifting rig for the travelling crane is controlled by controlling power on-off of the electromagnetic directional valve, the operating state of the accurate lifting rig for the travelling crane is further controlled, accurate travelling crane lifting on an important occasion is realized, and important lifting workpieces are protected. The accurate lifting rig for the travelling crane provided by the invention is simple in structure and reliable in operation, the accurate lifting operation of the travelling crane can be finished, the important lifting workpieces are fully protected, and the accurate lifting rig has wide application prospects.


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    Title :

    Accurate lifting rig for travelling crane


    Contributors:
    QIAN XUESONG (author) / ZHAO QIANWEN (author) / CHEN HUI (author)

    Publication date :

    2015-05-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES



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