The invention discloses a lifting limit device of a marine pneumatic hoist hook, which comprises a winch, a pneumatic motor, a three position four-way hand-directional valve, a two position two-way pneumatic operated directional valve, a two position three-way pneumatic operated directional valve and a two position three-way pneumatic operated directional valve control mechanism, wherein the two output ends of a three position four-way pneumatic reversing valve are respectively connected with the two ends of the pneumatic motor; the output end of an air source is connected with the input end of the three position four-way pneumatic reversing valve through the two position two-way pneumatic operated directional valve; the output end of the air source is also connected with the input end of the two position three-way pneumatic operated directional valve; the output end of the two position three-way pneumatic operated directional valve is connected with the pneumatic control end of the two position two-way pneumatic operated directional valve, and the two position three-way pneumatic operated directional valve control mechanism is arranged on the upper side of a hook. The invention has the advantages of simple structure and low manufacturing cost, and the two position three-way pneumatic operated directional valve control mechanism consisting of a transmission steel wire rope and a hoisting block is adopted for limiting the hoist hook lifting, so the limiting problem when the marine pneumatic hoist hook is used for lifting under an explosion-proof environment is solved, and the lifting limit device can be applied to a movable type pneumatic hoist.


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    Title :

    Lifting limit device of marine pneumatic hoist hook


    Contributors:
    WANG ZHIJUN (author) / JIANG YULIANG (author) / CAI JIAN (author) / YAO LEI (author)

    Publication date :

    2015-08-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES



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