CN101692355B - New paperless insulation self-adhesive acetal enamelled copper-silver alloy transposed semihard conductor - Google Patents

Abstract

The invention relates to a new paperless insulation self-adhesive acetal enamelled copper-silver alloy transposed semihard conductor which has small boundary dimension and excellent electrical properties, mechanical properties and bonding properties. The semihard conductor comprises a transposed core, wherein the outside of the transposed core is lapped with an insulating layer, the transposed core comprises a plurality of enamelled flat wires, the enamelled flat wires are arranged in two rows, the enamelled flat wires comprise copper-silver alloy conductors, wherein the outside of the copper-silver alloy conductors is coated with acetal paint, and the outside of the acetal paint is coated with self-adhesive paint. The transposed semihard conductor of the invention is characterized in that the insulating layer is a polyester mesh belt.

Description

Paperless insulated self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire

(1) Technical field

The invention relates to the technical field of transposition conductors for power transformers, in particular to a novel paperless insulating self-adhesive acetal enamelled copper-silver alloy transposition semi-rigid conductor. the

(2) Background technology

At present, the copper-silver alloy transposed wires used in power transformers are mainly paper-insulated self-adhesive acetal enamelled copper-silver transposed semi-rigid wires, as shown in Figure 1, which are composed of transposed wire cores wrapped with insulating paper 5 outside, wherein the transposed The wire core is made of several enamelled copper-silver alloy flat wires which are processed and transposed into two rows. The copper-silver alloy flat wire is made of copper-silver alloy conductor 2 coated with acetal paint film 3 outside; 5. When there are many layers of wrapping and the wrapping is not tight, local oil pockets will occur, which seriously affects the heat dissipation effect of the coil. At the same time, it will also cause the coil to be not tightly packed, resulting in a decrease in the ability to withstand short-circuit impact; and its external insulating paper For the winding, the outermost layer 51 and the innermost layer 53 are overlapped and wound, and the rest of the middle layers 52 are wound with gaps. The structure is complex and the space utilization rate of the transformer winding is low. the

(3) Contents of the invention

In view of the above problems, the present invention provides a novel paperless insulating self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire, which has small dimensions and excellent electrical, mechanical and bonding properties. the

Its technical solution is as follows: it includes a transposition wire core, the exterior of the transposition wire core is wrapped by an insulating layer, the transposition wire core includes several enamelled flat wires, and the several enameled flat wires are replaced In two rows, the enamelled flat wires include copper-silver alloy conductors, the exterior of the copper-silver alloy conductors is coated with acetal varnish, and the exterior of the acetal varnish is coated with self-adhesive varnish, which is characterized in that: Insulation is polyester mesh tape. the

It is further characterized in that: the insulating layer is wrapped by a single-layer polyester mesh belt; the polyester mesh belt is made of polyester rope and nylon fiber; the number of enamelled flat wires depends on the actual situation depends. the

The new paperless insulating self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire of the present invention uses copper-silver alloy as the metal conductor, which has good electrical and thermal conductivity, can improve the heat dissipation effect of the coil, and achieve the purpose of increasing the working temperature of the coil. Purpose: It uses polyester mesh belt as the insulating layer, which has good thermal shrinkage performance and mechanical strength. The polyester mesh belt is used for wrapping insulation with small thickness and tight winding, which ensures the short-circuit impact resistance of the coil. the

(4) Description of drawings

Figure 1 is a schematic diagram of the structure of the paper-insulated self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire in the past;

Figure 2 is a schematic diagram of the wrapping structure of paper-insulated self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire insulating paper in the past;

Fig. 3 is the structure schematic diagram of the novel paperless insulating self-adhesive acetal enamelled copper-silver alloy transposition semi-rigid wire of the present invention;

Fig. 4 is a schematic diagram of the wrapping structure of the new paperless insulating self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire insulation layer of the present invention. the

(5) Specific implementation methods

See Fig. 3 and Fig. 4, the present invention includes a transposition wire core, the exterior of the transposition core is wrapped by an insulating layer 1, the transposition core includes several enamelled flat wires, and several enameled flat wires are transposed into two rows , the enamelled flat wire includes a copper-silver alloy conductor 2, and the copper-silver alloy conductor 2 is coated with an acetal paint film 3 and 4 is a self-adhesive paint layer; the insulating layer 1 is a polyester mesh belt; The number of wrapped flat wires depends on the actual wrapping situation; the wrapping of insulating layer 1 is overlapping wrapping of single-layer polyester mesh tape. the

In the novel paperless insulating self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire with the structure of the present invention, the conductor is made of copper-silver alloy, which is produced by up-drawing continuous casting, continuous extrusion, and drawing processes, which improves the Plasticity of the metal, eliminating casting defects, recrystallization, changing the metal structure, refining the internal grains, thereby improving the electrical and mechanical properties of the metal, the silver content is controlled at 0.8-2‰; the resistivity of copper-silver alloy conductors at 20 °C ≤0.016903～0.017540Ω·mm ² /m, yield strength R _p0.2 ≥300N/mm ² , and there will be no obvious change in yield strength at 80℃～150℃ for a long time; the invention adopts polyester mesh belt as insulation Material, the polyester mesh belt is made of polyester rope and nylon fiber, which has good thermal shrinkage performance and mechanical strength. The polyester mesh belt is used for wrapping insulation with small thickness, tight winding, small size and The size is basically the same, and winding the transformer coil with it can effectively improve the utilization rate of the winding space and reduce the volume of the transformer; winding with the new paperless insulating self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire with the structure of the present invention The coil does not need to undergo special heat treatment, it only needs to be processed according to the normal coil treatment process, without adding any other production auxiliary equipment, which saves the manufacturing cost of the transformer; the polyester mesh belt has the function of shrinking when it is heated during operation, and it will completely replace the transformer. The bit wires are bundled firmly, which improves the impact resistance of the coil and ensures that the coil does not deform when a sudden short circuit occurs.

Claims (3)

1. paperless insulation self-adhesive acetal enamelled copper-silver alloy transposed semihard wire, it comprises the transposition core, described transposition core is outside wrapped by insulating barrier, described transposition core comprises several enameled sheet wires, described several enameled sheet wire replaces into two row, and described enameled sheet wire comprises the Kufil conductor, and described Kufil conductor is externally coated with acetal paint, described acetal paint is externally coated with the self-adhesion lacquer, and it is characterized in that: described insulating barrier is the polyester guipure; Described Kufil conductor adopts UPCAST, continuously extruded, drawing process production, and silver content is 0.8 ~ 2 ‰, 20 ℃ of resistivity of described Kufil conductor≤0.016903 ~ 0.017540 Ω mm ²/ m, yield strength Rp0.2 〉=300N/mm ²

2. paperless insulation self-adhesive acetal enamelled copper-silver alloy transposed semihard wire according to claim 1 is characterized in that: described insulating barrier wrapped for the single-layer polyester guipure overlapping wrapped.

3. paperless insulation self-adhesive acetal enamelled copper-silver alloy transposed semihard wire according to claim 2, it is characterized in that: described polyester guipure is worked out by polyester rope and nylon fiber.

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