An external oil type metal corrugated expansion oil conservator

Abstract

The invention relates to a compensating device used in a power system to change the volume as the oil temperature of a transformer changes, in particular to an external oil type metal corrugated expansion oil conservator, including a cabinet body and a metal corrugated oil tank installed in the cabinet Expansion body, the middle diameter of the metal corrugated expansion body is larger than the diameter at both ends, that is, the diameter of the metal corrugated expansion body shrinks from the middle to both ends in the axial direction; the cabinet is sealed and connected with the transformer oil tank through the oil pipeline, and the metal corrugated expansion body inside the cabinet The outside of the body is filled with transformer oil, and the inside of the metal corrugated expansion body is connected with the outside atmosphere through a breathing tube; the cabinet is provided with an exhaust pipeline for discharging the gas inside the cabinet. The invention not only has the appearance structure of the traditional oil conservator, but also realizes the longitudinal and vertical movement of the metal corrugated expansion body without guidance, and the transformer oil will not be polluted.

Description

technical field [0001] The invention relates to a compensation device which is applied in a power system to change volume as the oil temperature of a transformer changes, in particular to an external oil type metal corrugated expansion oil conservator. Background technique [0002] At present, there is a horizontal external oil conservator configured for transformers on the market. Its external structure is a metal cylinder, and the metal corrugated expansion body is cylindrical. It communicates with the atmosphere through the breathing port. Transformer oil is filled between the outside of the metal corrugated expansion body and the cabinet, and is connected to the transformer oil tank through the pipeline at the lower part of the cabinet, and the purpose of compensating for the volume change of the transformer oil is achieved through the expansion and compression of the metal corrugated expansion body. After several years of online operation, it was found that there were ...

AI Technical Summary

Problems solved by technology

[0003] 1. The cabinet body is made of carbon steel, and the metal corrugated expansion body is equipped with supporting rolling pulleys. During the movement, the pulleys have sliding friction with the inner wall of the cabinet, so it is easy to cause oil pollution

[0004] 2. Because the metal corrugated expansion body is a flexible body, it is unstable in the transformer oil and needs to be supported and guided by pulleys. It cannot be completely synchronized during movement, and it is easy to cause stagnation

[0005] 3. The oil level of the existing horizontal external oil storage tank needs to be converted twice, and the horizontal displacement of the metal corrugated expansion body is converted into a longitudinal oil level display, which is not intuitive and accurate

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