Transformer cooling coil structure

Abstract

The invention discloses a transformer cooling coil structure. The cooling coil structure also comprises a conductive cooling circulating structure, wherein the conductive cooling circulating structure comprises a connecting pipe, a conductive wire section, a comprehensive pipe, an outer cooling pipe, a four-way valve and a refrigeration device, the outer cooling pipe is arranged at a peripheral enclosure turn of a low-voltage coil, an outer pipe clamping groove is formed in the inner side pipe wall of the outer cooling pipe, the outer pipe clamping groove is clamped on the low-voltage coil, the low-voltage coil and the outer cooling pipe are fixed, the connecting pipe, the conductive wire section, the comprehensive pipe and the outer cooling pipe are respectively connected into the four-way valve so as to realize the interconnection, one end of the conductive wire section is connected with a low-voltage connector, the other end of the low-voltage coil is connected with the comprehensive pipe in the four-way valve, the connecting pipe is connected with the refrigeration device, the low-voltage coil is a hollow coil, a coil hollow cavity is formed inside the low-voltage coil, the low-voltage coil, the comprehensive pipe and the connecting pipe collectively form a closed pipeline, and under the action of the refrigeration device, cooling insulation gas circularly flows in the closed pipeline. The transformer cooling coil structure has the advantages of good cooling effect, double heat dissipation functions and simple structure.

Description

technical field [0001] The invention belongs to the technical field of test transformers, and relates to a cooling device for a dry-type transformer, in particular to a transformer cooling coil structure. Background technique [0002] test transformer, referred to as AC withstand voltage test Provides high voltage transformers. It is characterized by high output voltage, small capacity, transformer Short circuit impedance It is very large and the ratio is very large. [0003] Since the test transformer needs to be used on the test site, it is necessary to design a compact structure to minimize the volume under the premise of meeting the test capacity, so as to facilitate transportation and on-site installation. For the test transformer, the coil generates a lot of heat when it works for a long time, and the coil is easy to burn out, resulting in damage to the test transformer. [0004] In order to ensure that the heat generated by the test transformer during operation d...

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.

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