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Method for manufacturing large steel structure connected by multiple flanges
A manufacturing method of a large steel structure connected through multiple flanges comprises the steps that sectioning, flange machining, connecting, temporary splicing, splitting, face milling and assembling are adopted, a supporting girder of a radial gate of a flood discharge tunnel of a hydropower station is divided into a middle section and side sections, the side sections are located at the two ends of the middle section, and two flanges are adopted as a group and fixedly connected; then the middle section and the side section are connected with the girder bottom plate and the two sets of flanges into a whole, annealing is conducted after welding, stress is eliminated, then the two sets of flanges are separated, the four flanges are connected to the ends of the middle section and the side section respectively, the middle section and the side section are reassembled after the flanges are subjected to face milling, and the middle section and the side section are assembled into a whole. The problem that drilling holes cannot be accurately matched in the whole manufacturing process is solved, it is guaranteed that hole sites on all flange faces can accurately correspond, and the whole error is reduced.
一种多法兰连接的大型钢结构制造方法，分别采用分节、法兰加工、连接、临时拼装、拆分、铣面和组装，将水电站泄洪洞弧形闸门支撑大梁分成中间节和侧节，侧节位于中间节两端，采用两个法兰为一组并进行固连，再将中间节和侧节与大梁底板及两组法兰连接成一个整体，进行焊接后退火消除应力，之后对两组法兰进行分离，使四个法兰分别连接在中间节和侧节的端头上，再对法兰铣面后将中间节和侧节进行重新组装，克服了整体制造时不能精准配钻孔的问题，保证了各个法兰面上的孔位能够精准对应，减小了整体误差。
Method for manufacturing large steel structure connected by multiple flanges
A manufacturing method of a large steel structure connected through multiple flanges comprises the steps that sectioning, flange machining, connecting, temporary splicing, splitting, face milling and assembling are adopted, a supporting girder of a radial gate of a flood discharge tunnel of a hydropower station is divided into a middle section and side sections, the side sections are located at the two ends of the middle section, and two flanges are adopted as a group and fixedly connected; then the middle section and the side section are connected with the girder bottom plate and the two sets of flanges into a whole, annealing is conducted after welding, stress is eliminated, then the two sets of flanges are separated, the four flanges are connected to the ends of the middle section and the side section respectively, the middle section and the side section are reassembled after the flanges are subjected to face milling, and the middle section and the side section are assembled into a whole. The problem that drilling holes cannot be accurately matched in the whole manufacturing process is solved, it is guaranteed that hole sites on all flange faces can accurately correspond, and the whole error is reduced.
一种多法兰连接的大型钢结构制造方法，分别采用分节、法兰加工、连接、临时拼装、拆分、铣面和组装，将水电站泄洪洞弧形闸门支撑大梁分成中间节和侧节，侧节位于中间节两端，采用两个法兰为一组并进行固连，再将中间节和侧节与大梁底板及两组法兰连接成一个整体，进行焊接后退火消除应力，之后对两组法兰进行分离，使四个法兰分别连接在中间节和侧节的端头上，再对法兰铣面后将中间节和侧节进行重新组装，克服了整体制造时不能精准配钻孔的问题，保证了各个法兰面上的孔位能够精准对应，减小了整体误差。
Method for manufacturing large steel structure connected by multiple flanges
多法兰连接的大型钢结构制造方法
LIU GUIFANG (author) / ZHANG JIANZHONG (author) / GAO SHENG (author) / LI WEI (author) / ZHANG ZHENHUA (author) / PAN YUANXIAO (author)
2022-06-14
Patent
Electronic Resource
Chinese
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