Hoisting method of outer cover of main transformer

Abstract

The invention discloses a hoisting method for the outer cover of a main transformer. The operation steps are (1) preparation before hoisting, (2) trial hoisting: hoisting slowly to force each hoisting rope to move from top to bottom in the four corner bolt holes of the main transformer. Put the round steel temporary positioning rod under it, and tie four swaying ropes on the top to check the center of gravity deviation of the main transformer. According to the deviation of the lifting center of gravity, adjust the lifting holes on the spreader to find the best Balance point, using the principle of leverage to ensure the balance of hoisting the main transformer cover; (3) hoisting, (4) hoisting back. During the hoisting process, the outer cover of the main transformer must be hoisted vertically, and the center of gravity is accurately grasped to prevent tilting. There is no collision or damage during the hoisting and reinstallation process, which not only ensures the safety performance of the entire hoisting cover, but also Improve the efficiency and quality of work.

Description

technical field [0001] The invention belongs to the technical field of substation maintenance, and in particular relates to a hoisting method for a main transformer cover. Background technique [0002] The maintenance of the main transformer is a complicated task, the workload is heavy, and the maintenance time is long, and the long-term power failure will directly affect the reliability of the power supply. The traditional lifting method is to remove the radiator, bushing and other accessories before the main transformer hanging cover, and install the radiator, bushing and other accessories after the main transformer cover is reinstalled. The task of the main transformer hanging cover is huge. The four-point lifting method is adopted for lifting the main transformer cover. The specific method is to use a crane as a lifting device, and use a steel wire sling, a lifting ring, etc. as a sling to lift the outer cover of the main transformer. Before hoisting the main transform...

AI Technical Summary

Problems solved by technology

[0005] In the second step, in order to improve the phenomenon of uneven stress on the lifting ropes due to the different effective lengths of the lifting ropes during the lifting process of the main transformer, U-shaped rings can be added to the lifting ropes with shorter effective lengths to make each lifting rope The effective length of the sling is equal to

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