The invention relates to the field of buildings, and discloses a closure method of a large crane gantry structure. The closure method comprises the following steps that a jig frame is built and manufactured; assembling and welding a supporting leg a, a supporting leg b and a cross beam; assembling a flange tool; assembling and welding a supporting leg d and adding a fixed support; assembling and welding a ladder and a platform, then painting, and turning over by 90 degrees; the flange tool is dismounted, and a supporting leg d is mounted; mounting a large pinwheel supporting ring; and finally, replacing the process bolt with a formal bolt. The method has the beneficial effects that the flange tool is arranged at the top of the supporting leg, the flange tool can play a role in stabilizing and correcting the top of the supporting leg due to the fact that the supporting leg is large, the problem of inaccurate precision caused by the large size is solved, the precision of folding the supporting leg into a portal frame is improved, and the working efficiency is improved. A specific tool is adopted to overcome the limitation of sites and hoisting equipment, the mounting precision is ensured, and the conditions of instability and abnormal sound are prevented.

    本发明涉及建筑领域,公开一种大型起重机门架结构的合拢方法:包括以下步骤:搭建制作胎架;装焊支腿a、支腿b和十字梁;装配法兰工装;装焊支腿d和增加固定支撑;装焊梯子、平台后油漆,再翻身90°;拆除法兰工装,安装支腿d;安装大针轮支承环;最后将工艺螺栓更换为正式螺栓。本发明的有益效果是通过在支腿的顶部设法兰工装,由于支腿本身较大,法兰工装能够对支腿顶部起到稳固矫正的作用,防止由于体型较大从而造成的精度不准确的问题,提高支腿合拢成门架的精度,采用特定工装克服场地及起吊设备限制,保证安装精度,防止出现不平稳和异响的情况。


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    Title :

    Closing method for gantry structure of large crane


    Additional title:

    一种大型起重机门架结构的合拢方法


    Contributors:
    CHEN XINYI (author) / CHEN LI (author) / LIU RENLAI (author)

    Publication date :

    2023-12-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66C Krane , CRANES



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