Pressure relief valve protection device in leakage test process of transformer

Abstract

The embodiment of the invention discloses a pressure relief valve protection device in a leakage test process of a transformer. The device comprises a pressure tank arranged between a transformer anda gas tank. The pressure tank transitions gas introduced into the gas tank and then introduces the gas into the transformer, a plurality of protection accessories are installed on the pressure tank, and each protection accessory comprises a safety relief valve, a gas pressure gauge and a three-way connector. The safety pressure release valve is used for pressure release protection of gas pressurein the pressure tank. The gas pressure gauge is used for displaying a pressure value in the pressure tank. The three-way joint is used for connecting the transformer with the pressure tank and keepingthe pressure values in the transformer and the pressure tank consistent. The pressure tank is arranged between the transformer and the air tank to serve as a buffer link and is communicated with thetransformer, the air pressure is kept consistent, pressure relief protection is conducted before the rated pressure is reached in the leakage test process, and misoperation of a transformer pressure relief valve is effectively eradicated.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of transformer leak testing, and in particular to a pressure relief valve protection device for a transformer leak testing process. Background technique [0002] Oil leakage in the transformer not only affects the appearance and pollutes the environment, but also changes the transformer from a sealed state to an unsealed state. If things go on like this, it will have an adverse effect on the insulation quality and service life of the transformer; Running without oil insulation can lead to insulation degradation, breakdown, short circuit, burnout, and even explosion. [0003] Substation transformers must be tested for oil pressure leaks before they leave the factory. After transformers are replaced with oil conservator capsules, high and low casings and their rising seats, and oil-resistant rubber rings, etc., the transformers need to be inspected. The purpose of leak test is to che...

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Problems solved by technology

[0005] For this reason, the embodiment of the present invention provides a pressure release valve protection device in the process of transformer leak testing. By setting a pressure tank between the transformer and the gas tank as a buffer link, it is connected with the transformer to keep the air pressure consistent. The pressure relief protection is carried out before reaching the rated pressure, which effectively prevents the misoperation of the transformer pressure relief valve and solves the problem in the prior art that the transformer pressure relief valve is prone to pressure relief and oil injection due to manual control of the pressure value.

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