Quick replacement method of counterbalance of four-high mill

Abstract

The invention discloses a quick replacement method of counterbalances of a four-high mill, which is as follows: when the counterbalance of the large four-high mill is overhauled, the counterbalance fixed in a housing frame of the mill is replaced by the following steps of: firstly, confirming the safety of three parties, and stopping a medium; secondly, paving steel plates of delta 20mm on a working roller replacing rail; thirdly, disassembling a counterbalance connection bolt; fourthly, utilizing a manufactured cross traveling trolley to reversely carry the counterbalance from the inner part of the mill; and fifthly, hoisting the disassembled counterbalance by a crane. The method disclosed by the invention is simple in steps, convenient in operation, short in construction period, small in influence to the production and high in production efficiency.

Description

technical field [0001] The invention relates to the field of balance block devices used in large-scale four-high rolling mills for medium plates, in particular to a method for quickly replacing the balance blocks of large-scale four-high rolling mills. Background technique [0002] The balance block is the equipment of the medium plate four-high rolling mill. It is the key equipment in the rolling process of the steel plate. It mainly supports and balances the support rolls. When the balance weight is replaced, the initial traditional removal process is ( figure 1 ): [0003] 1. Use the work roll to change the guide roll, and put a few steel pipes on it; [0004] 2. Lay bamboo bridge boards or wooden boards on the steel pipes as maintenance platforms; [0005] 3. Hang a 5-ton chain hoist at a suitable position inside the window; [0006] 4. Remove the connecting parts of the balance weight; [0007] 5. Lift it up with the chain hoist that has been hung; [0008] 6. Fin...

AI Technical Summary

Problems solved by technology

[0011] 1. Due to the narrow working space and the large tonnage of the hoisting equipment during the hoisting process, the driving cannot be hoisted directly during the protective disassembly process, which takes a long time and high construction costs;

[0012] 2. During the hoisting process of the balance block, chain hoists are used for hoisting, which is difficult to hoist and has many potential safety hazards;

[0013] 3. Because the hoisting process is long and the construction period is long, the downtime of the four-roll mill is long, which reduces the production efficiency

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