The invention discloses a portal crane, which belongs to the technical field of hoisting equipment, and comprises a portal frame, a portal crane cart and a portal crane trolley, the portal crane trolley is arranged at the top of the portal frame, the portal crane cart is arranged at the bottom of the portal frame, and the portal crane is characterized in that a lifting device is mounted on a frame of the portal crane trolley and is connected with a rotary lifting appliance; the lifting device comprises a winding drum, a steel wire rope, a motor, a speed reducer, a movable pulley block, a brake and a balance pulley mechanism, the winding drum is connected with the speed reducer, the input end of the brake is in transmission connection with the output end of the motor, the output end of the brake is in transmission connection with the speed reducer, and the steel wire rope is wound on the winding drum, the movable pulley block and a balance pulley. Accurate positioning can be realized in the lifting direction of the lifting device, so that the mounting precision and the mounting efficiency of the prefabricated pavement slab are greatly improved.

    本发明公开了一种门式起重机,属于起重设备技术领域,包括门架、门机大车和门机小车,门机小车设置在门架顶部,门机大车设置在门架底部,其特征在于:所述门机小车的车架上安装有起升装置,起升装置上连接有旋转吊具,起升装置包括卷筒、钢丝绳、电动机、减速器、动滑轮组、制动器和平衡滑轮机构,卷筒与减速器联接,制动器的输入端与电动机的输出端传动连接,制动器的输出端与减速器传动连接,所述钢丝绳绕接在卷筒、动滑轮组和平衡滑轮上。本发明能够在起升装置升降方向实现精准定位,从而极大的提高预制道面板安装精度和安装效率。


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    Title :

    Portal crane


    Additional title:

    一种门式起重机


    Contributors:
    YANG FANG (author) / GUO FENG (author) / FAN RUGU (author) / LI XINXIN (author) / WANG BING (author) / WU SIGOU (author) / ZHANG JIAN (author) / LI WUFEI (author)

    Publication date :

    2024-04-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66C Krane , CRANES / B66D Haspeln , CAPSTANS



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