Conductor for dry-type transformer and its manufacturing process and manufacturing equipment

Abstract

The invention discloses a wire used for a dry-type transformer and its manufacturing process and manufacturing equipment. It includes a conductive body (101), and it also includes glass fibers wound and fixed on the outer peripheral surface of the conductive body (101) in a spiral form. strip (102); the adjacent glass fiber strips (102) on the conductive body (101) are distributed at intervals; the manufacturing equipment includes a wire-feeding device (5) for feeding the conductive body (101), used for The winding device (6) for the conductive body (101) from the pay-off device (5) to spirally wind the glass fiber tape (102), the drying device (7) for drying the wound conductive body (101) ) and a wire take-up device (8) for collecting the dried conductive body (101); the advantage of the present invention is that the wire produced by this process is applied to a dry-type transformer, so that the dry-type transformer No partial discharge will occur.

Description

technical field [0001] The invention relates to a wire used for a dry-type transformer, its manufacturing process and manufacturing equipment. Background technique [0002] as attached figure 1 , attached figure 2 and attached image 3 As shown, at present, the epoxy resin-cast coil 2' on the dry-type transformer (the wire is wound and poured through epoxy resin), the wire 1' used in this type of coil, the specific structure is the outer surface of the wire body 101' Wrapping the insulating layer 102', the form of setting the insulating layer is mainly insulating varnish-wrapped insulation or film-wrapped wire-wrapped insulation. Since the insulating material used in the above two types of insulating layers is mainly polyester insulating varnish, this type of insulation The varnish contains volatile solvents, and the coils wound with such wires tend to generate bubbles inside the coil due to the volatilization of the solvent in the insulating varnish during the epoxy cas...

AI Technical Summary

Problems solved by technology

However, this type of mesh cloth material is formed by weaving glass fiber tapes and impregnating a solvent-containing insulating varnish after drying. When the coil is vacuum poured, the solvent will also volatilize and generate bubbles, which will affect the service life of the transformer.

[0004] The existing wire production process includes a wire unwinding step, a wire forming step and a wire take-up step; wherein the main step in the wire forming step is to carry out an enamelling operation to the bare wire (conductive body) to make an enameled wire, and the existing wire The production process is basically carried out for winding enameled wire, and the related production equipment used in it is only common equipment, including wire-releasing device, enameled device, drying device and wire-receiving device. Finally, with the help of these manufacturing processes and The wires produced by the production equipment have the problem of the above analysis, that is, the coils wound with this type of wires are prone to generate air bubbles inside the coils due to the volatilization of the solvent in the insulating varnish during the epoxy casting process (due to the high temperature during the epoxy casting process as high as 80 Celsius, it is easy to trigger the volatilization of the solvent in the insulating paint), due to the existence of air bubbles, the transformer will generate partial discharge when it is powered on, which will affect the service life of the transformer

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