Local overheating self-curling type transformer

Abstract

The invention discloses a local overheating self-coiling type transformer, and belongs to the field of transformers. A fixed-point light variable patch is attached to the surface of a heat dissipation fin, when the local temperature is too high, a thermally variable hemisphere near the position is heated, on one hand, outward thrust is outwards generated on the edge of a self-coiling light sheet, and on the other hand, due to the fact that an abnormal high-temperature thermal change connecting rod is subjected to hot melting, water permeates into an adhesive layer along a water guide ejector rod, the adhesive layer is loosened, under the above dual effects, the end portion of a curled end is separated from the fixed-point light change patch, self-curling is achieved, the local high-temperature position is positioned, and then fixed-point early warning is conducted on workers. According to the local overheating self-curling type transformer, the potential safety hazard that insulating oil overflows due to local high-temperature aging of the heat dissipation fin is effectively avoided, in addition, when the transformer is self-curled, a light bag is wrapped, and when light is dark, light spots on the surface of the transformer show a local dim phenomenon, so that the early warning effect is more obvious at night or when it is dark.

Description

technical field [0001] The invention relates to the field of transformers, in particular to a self-curling transformer with partial overheating. Background technique [0002] Transformer is a device that uses the principle of electromagnetic induction to change AC voltage. The main components are primary coil, secondary coil and iron core (magnetic core). Transformer cooling refers to dissipating the heat generated by the running transformer through certain methods. When the transformer is running, the heat generated by the loss of the winding and core must be dissipated in time to avoid insulation damage caused by overheating. For small-capacity transformers, the ratio of the outer surface area to the volume of the transformer is relatively large, and a self-cooling method can be used to dissipate heat through radiation and natural convection. [0003] When the transformer is running, it will generate a lot of heat. In the prior art, heat dissipation scales are usually ar...

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Problems solved by technology

[0003] When the transformer is running, it will generate a lot of heat. In the prior art, heat dissipation scales are usually arranged on the surface of the transformer to increase the heat dissipation area and achieve the effect of heat dissipation. The difference in temperature may easily lead to uneven local temperature distribution or local excessive temperature. Under long-term action, the aging speed of the cooling scales at this place is higher than that of other parts, resulting in the potential safety hazard of internal insulating oil overflow.

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