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马钢修建部机检二队在同一轨道上有两台龙门吊车需要互换位置用。一台为起重量10吨、自重40吨的L型龙门吊车,另一台为起重量5吨、自重16吨的桁架式龙门吊车。为了保持整体结构的完整以及节省起重机具的费用,他们采用地面纵向位移法取得了成功。具体做法如下: 1.选用自重轻、左右对称的5吨桁架式龙门吊车作为移动对象。 2.在紧靠大车轴承座的内侧,借用4个车轮轴承组作为临时位移龙门吊车承重用。 3.由于龙门吊车大梁长32米,需铺设80米长的24 K轨道2根。轨道可固定在厚钢板上,
Masteel Construction Ministry inspection team two in the same track with two gantry crane interchangeable position. One is a L-gantry crane with a lifting capacity of 10 tons and a dead weight of 40 tons. The other is a gantry crane with a lifting capacity of 5 tons and a dead weight of 16 tons. In order to maintain the integrity of the overall structure and to save the cost of lifting gear, they used the vertical ground displacement method to success. Specific practices are as follows: 1. Use self-weighing light, symmetrical about 5 tons of gantry gantry crane as a moving object. 2. Close to the inner side of the cart bearing, borrow 4 wheel bearing group as a temporary displacement gantry crane bearing. 3. Since the gantry crane girder is 32 meters long, two 24 K rails of 80 meters need to be laid. Track can be fixed in the thick steel plate,