A method for disassembling and installing large transformer bushings without draining oil

Abstract

The invention provides a method for disassembling and assembling a large-scale transformer bushing without draining oil, and belongs to the technical field of large-scale power transformers. It includes the following steps: 1) When the large-scale transformer bushing needs to be repaired, stop the operation of the transformer and at the same time close the valve between the transformer oil conservator and the body, and interrupt the oil supply channel from the oil conservator to the body; 2) Set the transformer oil temperature Lowered to the point where the transformer oil in the transformer body cools and shrinks, the volume decreases, and the oil level drops below the top surface of the oil tank where it needs to be drilled for maintenance; 3) Opening for maintenance can be carried out without draining the oil; 4) After the maintenance is completed, inject transformer oil into the transformer body to the set oil level. The method of the invention is simple and safe, improves the reliability of power supply and maintenance quality, reduces operation risk, reduces the consumption of manpower and material resources, reduces the risk of transformer oil being polluted, and shortens maintenance time.

Description

Technical field [0001] The present invention is a large -scale power transformer technology field, which involves a method that does not disassemble the large transformer sleeve. Background technique [0002] In large transformers maintenance, when the top of the pipe on the top of the transformer is defective, the oil pump is usually used to put the oil on the top of the transformer at the oil storage tank to disassemble and repair the components and other components on the top of the transformer.However, the oil release work needs to use large vehicles, transport oil storage tanks, oil pumps, pipelines and other large equipment to the scene. A large amount of manpower and material resources requires a long time, especially after the oil release is completed.The transformer body, the inspection and maintenance of oil pumps, pipelines, oil storage tanks and other inspection and maintenance will cause transformer oil to be contaminated during the round -trip cycle. After injecting...

AI Technical Summary

Problems solved by technology

However, the oil discharge work requires the use of large vehicles, transport oil storage tanks, oil pumps, pipelines and other large equipment to the site, which requires a lot of manpower and material resources, and takes a long time, especially after the oil discharge maintenance is completed, the transformer oil needs to be replenished. Improper inspection and maintenance of the transformer body, oil pumps, pipelines, oil storage tanks, etc. will cause the transformer oil to be polluted during the round-trip cycle, and all the transformer oil will be polluted after being injected into the transformer body, resulting in the need to reprocess dozens of tons of oil and even endanger the transformer equipment safe and stable operation

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