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我公司使用的八台TQ25t·m整体拖运、快速架设塔机,在1987年年底设备检查时,发现塔身底节销轴处的V型钢结构焊缝被不同程度地锈蚀,有的角钢已变形。由于是从里向外锈蚀,所以,只有当焊缝被锈蚀时,才能发现,其危险性很大,有的已影响了使用。这个故障是由于制造时的忽视,未将V型结构顶部的方孔封焊好,导致雨水顺缝灌满V型焊管,锈蚀角钢和焊缝。针对发现的问题,采取了如下措施: 1.对锈蚀严重、角钢发生变形的立即放倒机(或吊臂着地)进行补焊。 2.对锈蚀较轻且工程还急需的塔机,先用电焊
The eight TQ25t · m hangers used by our company quickly erected the tower crane. When the equipment was inspected at the end of 1987, it was found that the weld of the V-shaped steel structure at the bottom of tower was corroded to some extent. Deformation. Because it is from the inside out rust, so only when the weld is corroded, we can find that the danger is great, and some have affected the use. This failure was due to negligence at manufacture and did not seal the square hole at the top of the V-shaped structure, causing rainwater to fill up with V-shaped welded pipe, corroded steel and weld seam. In response to the problems identified, the following measures have been taken: 1. Make repairs to an immediately down machine (or crane landing) where the corrosion is serious and the angle is deformed. 2. On the lighter corrosion and the project also urgently needed tower crane, the first use of electric welding