Casting mould for high-voltage coil for dry-type transformer

Abstract

The invention discloses a casting mould for a high-voltage coil for a dry-type transformer, which comprises an inner mould and an outer mould, wherein the inner mould is arranged in a vacuum chamber, and the outer mould is arranged on the outer layer of the inner mould. The casting mould for the high-voltage coil for the dry-type transformer is characterized in that the upper ends and the lower ends of the inner mould and the outer mould are respectively provided with bottom plates connected with the end parts of the inner mould and the outer mould; a coil casting cavity is formed among the inner mould, the outer mould and the bottom plates; the outer mould is provided with a casting hole; the casting hole is also provided with a coil outlet template; and the coil outlet template is locked on the outer mould through fixed sword iron. By adopting the casting mould for the high-voltage coil for the dry-type transformer, the structure is simple, and the use is convenient; the coil can be conveniently cast and shaped under a vacuum condition; partial discharge does not happen; the coil has the excellent property of not generating bubbles; after being manufactured and shaped, the produced coil can be easily taken out, and the product precision is accurate. Moreover, the labor strength of workers is reduced, the labor cost is saved, and the production efficiency is improved. Moreover, the casting mould for the high-voltage coil for the dry-type transformer is highly flexible and is easy to popularize and apply.

Description

technical field [0001] The invention relates to the field of manufacturing and processing of high-voltage wire products, in particular to a high-voltage coil casting mold for a dry-type transformer. Background technique [0002] At present, the temperature rise of the high-voltage coil of the general dry-type transformer is usually determined by the insulation grade requirements of the product, and the temperature rise is related to the heat generation and heat dissipation area of ​​the coil. The temperature rise of the high-voltage coil of the dry-type transformer during operation is related to To the service life of the high-voltage coil of the dry-type transformer. [0003] The high-voltage coils of existing dry-type transformers generally adopt a resin casting structure, but the existing high-voltage coils are prone to bubbles during casting, which affects the quality of the high-voltage coils, and the insulation reliability is low. Moreover, the casting process is more...

AI Technical Summary

Problems solved by technology

[0003]The high-voltage coils of existing dry-type transformers generally adopt a resin casting structure, but the existing high-voltage coils are prone to bubbles during casting, which affects the quality of the high-voltage coils and has low insulation reliability , and now the casting process is also relatively complicated, with many steps and poor flexibility. Some details still cannot meet the production standards, and it is more prone to defective products, and even partial discharges. It is also complicated and troublesome when taking products, causing Productivity decline

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