Transformer with dual cooling system

Abstract

The present invention discloses a transformer with double cooling systems. A cooling insulation structure comprises a first cooling tube with an inverted U-shaped cross section and a second cooling tube with a line-shaped cross section; two inverted U-shaped ends of the first cooling tube are respectively connected with two ends of the second cooling tube through insulated heat-conducting columns; the first cooling tube and the second cooling tube are respectively connected with an external cooling cycle device; the external cooling cycle device comprises a first cooling cycle and a second cooling cycle; a vertical closed tube cavity is arranged in each insulated heat-conducting column; mercury is injected into the lower half of the closed tube cavity; a first cooling terminal, a second cooling terminal and a protection terminal are sequentially arranged on the upper half of the closed tube cavity from the bottom up; an electromagnetic relay is further arranged in a housing; the electromagnetic relay comprises an electromagnet and an armature; the first cooling terminal is connected to a connecting circuit between the armature and the external cooling cycle device as a switch; the second cooling terminal is connected to a power source circuit of the electromagnet as a switch; and the protection terminal is connected to a circuit breaker of a low-voltage coil as a switch.

Description

technical field [0001] The invention belongs to the technical field of transformers, in particular to a transformer with double cooling systems. Background technique [0002] When the transformer works for a long time, the coil generates a lot of heat, and the coil is easy to burn out, resulting in damage to the transformer. In order to ensure that the heat generated by the transformer during operation does not affect the normal operation of the transformer, it is necessary to add a cooling system to the transformer. The water cooling method is one of the more common cooling methods for transformers on the market at present, that is, a water cooling device is installed on the transformer. This method is generally realized by the water circulation outside the primary or secondary hollow wire tube surrounded by the iron core. The water cooling device is placed outside the coil. This local cooling method can only cool the surface temperature, but not the internal temperature. ...

AI Technical Summary

Problems solved by technology

The water cooling method is one of the more common cooling methods for transformers on the market at present, that is, a water cooling device is installed on the transformer. This method is generally realized by the water circulation outside the primary or secondary hollow wire tube surrounded by the iron core. The water cooling device is placed outside the coil. This local cooling method can only cool the surface temperature, but not the internal temperature. The heat exchange area between the cooling device and the coil is small, which cannot achieve good heat dissipation and cooling effect.

Moreover, the cooling liquid used in current transformers is an insulating liquid, and the cost is high

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