Breather for transformers

Abstract

The invention discloses a breather for transformers and solves the problem that since exhaust and suction passages of an existing breather for transformers are not separated, oil-bearing gas exhausted by an oil tank of a transformer passes by a drying barrel and contaminate a drying agent. The breather comprises a drying barrel and also comprises an intake passage and an exhaust passage, the suction passage is communicated with a gas passage of an oil tank, the intake passage is provided with an intake one-way valve that has a flow direction from the outside of the breather toward the gas passage of the oil tank, the intake passage is communicated with the drying barrel, the exhaust passage is provided with an exhaust one-way valve that has a flow direction from the gas passage of the oil tank toward the outside of the breather, one end of the exhaust passage is communicated with the gas passage of the oil tank, the other end of the exhaust passage is communicated with the outside of the breather, and the exhaust passage is isolated from the drying agent in the drying barrel. The breather has the advantages that the intake passage and the exhaust passage are separated in order to directly discharge oil-bearing gas exhausted by the oil tank of the transformer out of the breather, the service life of the drying agent is greatly extended, smoothness of a gas flow in the breather is maintained for long time, and maintenance cost is reduced.

Description

technical field [0001] The invention relates to a transformer device, in particular to a transformer respirator. Background technique [0002] At present, for high-voltage electrical equipment filled with insulating oil, such as transformers, reactors, etc., the oil tank will expand and contract due to temperature changes, resulting in changes in the oil level of the oil tank. Respirators are required to balance the air pressure difference inside and outside the tank. At present, in the respirator used in the transformer oil tank, the exhaled gas and the inhaled gas of the oil tank generally pass through the desiccant air chamber, that is, both exhalation and inhalation pass through the same airway. Due to the thermal expansion and high pressure of the oil tank, the gas exhaled from the oil tank contains oil, which will contaminate the desiccant in the drying chamber and the components installed in the drying cylinder, affecting the hygroscopic performance of the desiccant, ...

AI Technical Summary

Problems solved by technology

Due to the thermal expansion and high pressure of the oil tank, the gas exhaled from the oil tank contains oil, which will contaminate the desiccant in the drying chamber and the components installed in the drying cylinder, affecting the hygroscopic performance of the desiccant, and long-term oil pollution may cause the oil film of the desiccant Adhesion, clogging the drying cylinder, causing poor breathing of the fuel tank

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