The invention provides a portal crane, which comprises a cab, an A-frame, a pulling rod, a trunk beam, a wire rope, a hook, a double link jib, a platform, a rotary column, a crossed portal and supporting legs; the A-frame is arranged on the top of the cab, and the bottom of the cab is fixedly connected with the platform; one end of the A-frame is rotatably connected with the pulling rod, and the trunk beam is arranged at one end of the pulling rod; the double link jib is arranged on one side of the platform; the rotary column is arranged on the bottom of the platform, and one end of the rotary column is connected with the crossed portal; the supporting legs are fixedly arranged on the bottom of the crossed portal. The structure of the portal crane is compact, operation is stable, the lifting capability is large, the portal crane can travel within a specific range during lifting, power is an electromotor, both reliability and maintainability are good, the operating cost is extremely low, the gradeability is high, the portal crane can carry out construction on soft ground such as muddy ground and swamp, travelling is stable during lifting, a variety of working devices can be used for carrying out a variety of operations, the range of application is wide, the operating efficiency of the portal crane can be increased, and the portal crane is suitable for popularization and use.


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    Title :

    Portal crane


    Contributors:
    CHEN DAXING (author)

    Publication date :

    2015-12-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES



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