Oil drain valve for 10KV oil-immersed transformers

Abstract

The invention discloses an oil drain valve for 10KV oil-immersed transformers, comprising a first throttle valve (1), a second throttle valve (2), a combined plug (3), a residue cover (4) and a door lock (5). The combined plug (3) is fixed in the first throttle valve (1), the residue cover (4) is fixed to one side, in communication with and close to an oil inlet of the first throttle valve (1), of the middle of the combined plug (3), one side of the combined plug (3) close to an oil outlet of the first throttle valve (1) is fixedly connected with the second throttle valve (2), and an oil outlet of the first throttle valve (1) is fixedly provided with the door lock (5); the oil drain valve can be removed and changed without powering off or causing leakage of transformer oil; oil discharge is relatively accurate, impurities in the transformer oil are also filtered, sampling requirements are met, and the later process for replacing the combined plug, the residue cover and the second throttle valve is very simple; the door lock is mounted so that criminals are prevented from removing the oil drain valve to steal oil.

Description

technical field [0001] The invention belongs to the technical field of transformers, in particular to a 10KV oil-immersed transformer oil discharge valve. Background technique [0002] At present, when the oil-immersed transformer needs to replace the internal heat dissipation oil or take an oil sample from the transformer for quality inspection, it needs to drain the oil from the oil drain plug. The large transformer in the existing design has an oil drain valve and a sampling port, and the general The small transformer combines the two into one. The current common problems of the oil drain plug with this two-in-one structure are: when the oil plug is disassembled and replaced, the power cannot be cut off, which will cause the leakage of transformer oil and pollute the work. and the surrounding environment, it is easy to be reported by nearby people; the oil drain plug has a simple structure and can be easily disassembled with a common wrench. Often criminals steal transfor...

AI Technical Summary

Problems solved by technology

[0002] At present, when the oil-immersed transformer needs to replace the internal heat dissipation oil or take an oil sample from the transformer for quality inspection, it needs to drain the oil from the oil drain plug. The large transformer in the existing design has an oil drain valve and a sampling port, and the general The small transformer combines the two into one. The current common problems of the oil drain plug with this two-in-one structure are: when the oil plug is disassembled and replaced, the power cannot be cut off, which will cause the leakage of transformer oil and pollute the work. and the surrounding environment, it is easy to be reported by nearby people; the oil drain plug has a simple structure and can be easily disassembled with a common wrench. Often criminals steal transformer oil after disassembly, because the transformer oil is stolen, resulting in poor heat dissipation of the transformer , causing its damage, and then powering off the line; in the process of sampling transformer oil, generally the sampling oil does not exceed 80ML, and the large transformer adopts the negative pressure suction method, that is, the sampling oil is extracted from the sampling port by using the principle of a syringe , the whole operation process does not pollute the working environment, there is no oil leakage, and the extraction volume is relatively accurate, and there is no intermediate pollution, but the two-in-one oil drain plug used in small transformers cannot be done, and when sampling, open the drain plug The plug first discharges the "dead oil" containing impurities and dirt, and then the oil sufficient for sampling can be discharged

The transformer anti-theft oil drain valve currently used has a relatively complex structure and a single function, and at the same time cannot control the quality and amount of oil released.

Images