Low-pressure cylinder chain type hoisting adjusting device and method

Abstract

The invention belongs to the technical field of mechanical design, and particularly relates to a low-pressure cylinder chain type lifting adjusting device and method. The device comprises an upper unloading cable, an upper adjusting sleeve, an upper connecting block, a lower connecting block, a lower adjusting sleeve, a lower unloading cable, a connecting web I and a connecting web II, the lower end of the upper unloading cable is connected with the upper end of the upper adjusting sleeve, and the lower end of the upper adjusting sleeve is connected with the upper end of the upper connecting block; the lower end of the upper connecting block is connected with the upper end of the lower connecting block through the connecting web I and the connecting web II; the lower end of the lower connecting block is connected with the upper end of the lower adjusting sleeve; the lower end of the lower adjusting sleeve is connected with the upper end of the lower unloading cable. The method is used for solving the problem that the low-pressure outer cylinder is difficult to hoist, the hoisting safety risk of large parts such as the low-pressure outer cylinder is reduced, the hoisting success rate of the low-pressure outer cylinder is increased, the hoisting time is shortened, and the overhaul efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical design, and in particular relates to a low-pressure cylinder chain-type hoisting adjustment device and method. Background technique [0002] A steam turbine in a power station consists of four low-pressure cylinders and one high-pressure cylinder. The low-pressure cylinder is large in size and heavy in weight. During the maintenance process, the hoisting of the low-pressure outer cylinder is the most troublesome, and it is difficult to level and adjust. The low-pressure cylinder has many matching positions with the inner cylinder and the partition, and the gap is small. , it is difficult to hang out or install in place. The special spreader provided by the manufacturer is a pair of steel wire ropes each with an adjustment flower basket. In order to prevent interference with the outer wall of the low-pressure cylinder, the upper lifting point of the low-pressure cylinder is used. Due to the hig...

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Problems solved by technology

The low-pressure cylinder is large in size and heavy in weight. During the maintenance process, the hoisting of the low-pressure outer cylinder is the most troublesome, and it is difficult to level and adjust. The low-pressure cylinder has many matching positions with the inner cylinder and the partition, and the gap is small. , it is difficult to lift out or install in place

The special spreader provided by the manufacturer is a pair of steel wire ropes each with an adjustment flower basket. In order to prevent interference with the outer wall of the low-pressure cylinder, the upper lifting point of the low-pressure cylinder is used. Due to the high position of the adjustment device and the offset weight, the hook or The adjustment needs to be adjusted by standing on the top of the cylinder, which is difficult to operate and was eventually abandoned; a pair of steel wire ropes without adjustment function has been used in the back, and the lower part of the low-pressure cylinder is used for lifting points. Although the hook is easier, the length of the wire rope itself is biased, resulting in The low-pressure outer cylinder is not easy to level during the lifting process. In practical applications, the cylinder has been difficult to lift out and in place many times, causing great safety hazards

[0003] Some unit steam turbines use steel wire rope and chain hoist to lift the low-pressure outer upper cylinder. Due to the heavy weight of the low-pressure cylinder, a chain hoist with a larger tonnage is used. The adjustment of the chain hoist solves the problem of consistent initial length, but when the cylinder is opened Lifting will exceed the rated lifting capacity of the chain hoist due to the jamming of the cylinder and the inner parts of the cylinder, forming a new safety hazard

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