A built-in oil-immersed transformer nitrogen injection device

Abstract

The invention provides a built-in nitrogen injection device of an oil-immersed transformer. The device comprises an open corrugated pipe, a permanent magnet, a connection nut, a connection flange and a stop valve, and is characterized in that the nitrogen injection device of the oil-immersed transformer is quick to install, an oil tank structure does not need to be changed, and leaking points are few. The open corrugated pipe is fixed at the bottom or the inner wall of a transformer oil tank through the permanent magnet, one end of the open corrugated pipe is closed, the other end of the open corrugated pipe is connected to the connection flange through the connection nut, the connection flange is provided with a front channel, a rear channel and a middle channel, the front channel and the rear channel of the connection flange are connected with an oil discharge opening and an oil discharge valve of the transformer oil tank, and the middle channel of the connection flange is connected with a nitrogen inlet pipe and the stop valve. By means of the built-in nitrogen injection device, a nitrogen injection point can be aligned to a transformer winding at a short distance, coverage is comprehensive, the nitrogen injection effect is good, installing is convenient, a transformer box body does not need to be improved, and investment cost is reduced.

Description

technical field [0001] The invention relates to the field of electric fire protection, in particular to an oil-immersed transformer cooling and fire extinguishing component-a nitrogen injection device. Background technique [0002] Power transformers are one of the most important equipment in power plants and substations, and their safety has an important impact on power grids and social stability. Oil-immersed transformers are the most commonly used, but due to their own structure, insulating materials used and operating conditions of transformers, oil-immersed transformers have hidden dangers of fire accidents. Transformer explosion and fire is usually caused by arc discharge caused by transformer winding insulation damage, which leads to a sudden increase in oil temperature. Cracking, air and flammable gas mixed to explode, causing transformer oil to burn, main transformer to catch fire, substation power outage, causing huge losses to the power grid, and at the same time...

AI Technical Summary

Problems solved by technology

Oil-immersed transformers are the most commonly used, but due to their own structure, insulating materials used and operating conditions of transformers, oil-immersed transformers have hidden dangers of fire accidents

Transformer explosion and fire is usually caused by arc discharge caused by transformer winding insulation damage, which leads to a sudden increase in oil temperature. Cracking, air mixed with flammable gas will explode, causing transformer oil to burn, main transformer to catch fire, substation power outage, causing huge losses to the power grid, and at the same time causing extremely bad impact on society

[0003] At present, the transformer fire protection system based on the principle of oil discharge and nitrogen injection at home and abroad adopts the external nitrogen injection method, that is, the bottom of the transformer oil tank is perforated, and then connected to the external nitrogen injection pipeline, and nitrogen is injected into the oil tank from the hole on the wall of the oil tank. , the processing time is long in this way, the distance from the fault point is far away, the effect of nitrogen injection is poor, there are many leakage points, maintenance is difficult, and the cost is high

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