External oil type metal corrugated expansion oil conservator

Abstract

The invention relates to a compensation device applied to an electric system, in particular to an external oil type metal corrugated expansion oil conservator. The volume of the compensation device changes along with oil temperature changes of a transformer. The external oil type metal corrugated expansion oil conservator comprises a conservator body and a metal corrugated expansion body mounted in the conservator body. The middle diameter of the metal corrugated expansion body is inwards reduced towards the middle in the axial direction. The conservator body is in sealed connection with an oil tank of the transformer through an oil conveying pipeline, the space, outside the metal corrugated expansion body, in the conservator body is filled with transformer oil, and the interior of the metal corrugated expansion body is communicated with the outside air through a breathing pipe. An exhaust pipeline for exhausting gas in the conservator body is arranged on the conservator body. The external oil type metal corrugated expansion oil conservator has the appearance structure mode of a traditional oil conservator and achieves longitudinal perpendicular motion of the metal corrugated expansion body, guide is not needed, and the transformer oil cannot be contaminated.

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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