Method for dismounting rolling mill stand in limited space

Abstract

The invention relates to a method for dismantling a rolling mill stand in a limited space, which comprises the following steps of: selecting to carry out hoisting operation on an operation side, and when the operation side of a rolling mill is a roll changing device, firstly dismantling the roll changing device before dismantling the stand to ensure that a vehicle is unblocked; after the roller replacing device is detached, the roller replacing pit is filled with sand and stones; after the roller replacement pit is filled with the sand, steel plates are fully laid above the roller replacement foundation, so that the standing position of the truck crane is guaranteed, a roller replacement top plate is supported by steel pipes, and meanwhile local loads are reduced; according to the thickness of a basement top plate, when the bottom of the roll changing pit is a rolling mill basement, steel pipe supports still need to be additionally arranged at the bottom to guarantee structural safety; after the truck crane enters the middle warehouse, the hoisting operation is in place, and the rolling mill housing is hoisted. The rolling mill stand is hoisted by the simplest method by utilizing the characteristics of convenience, convenience and the like of the mobile crane, so that the risk of original double-machine-table hoisting or the hoisting failure is avoided, meanwhile, the time for manufacturing a special hoisting tool is shortened, and the construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of installation and maintenance of large equipment, in particular to a method for removing a rolling mill stand in a limited space. Background technique [0002] With the development of the city, the factory buildings that were previously located in the new center of the city are constantly moving out. These factory buildings often contain large and important production equipment in the past, and the dismantling of these equipment is often carried out in a confined space. For example, the demolition project of a stainless steel rolling mill in a certain city is five continuous rolling, and the cold rolling span (1) between line 1-13 and line 1-15 is the rolling mill area, with a total of 5 rolling mill units, and the dimensions of the rolling mill stand are: 9825mm*3940mm *1500mm, the weight of a single piece is about 109t, and the weight of the frame spreader is 9 tons. Since there is only one 65t and one...

AI Technical Summary

Problems solved by technology

Since there is only one 65t and one 35t lifting equipment in the cold-rolled span (1), a single crane cannot meet the hoisting requirements of the rolling mill frame, and the total rated lifting capacity of the two cranes in the cold-rolled span (1) is (65t) +35t)=100t<109t of the rolling mill stand, which also cannot meet the hoisting requirements of the dismantling operation

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