CN212694860U - Nickel-plated copper mica winding wire - Google Patents

Abstract

The utility model relates to a nickel-plated copper mica winding wire, by interior and outer copper conductive core, nickel-plated layer, organic silicon resin layer A, corona resistant mica layer, glass silk fibre layer and organic silicon resin layer B of including. Through preheating and evenly covering the semi-solid membrane to the nickel-copper wire, let lead the skin and at first form a layer of high adhesive force insulating layer, promote wire adhesive force and aquatic withstand voltage ability, simultaneously, the organosilicon resin layer of semi-solid state is when further wrapping the package mica layer, can guarantee through the mould and around the resin layer non-adhesion drop when covering the mouth device, and can be inseparable with the laminating of outsourcing mica layer, form fine and close overall structure when further heating solidification, very big promotion wire mechanical and electrical properties.

Description

Nickel-plated copper mica winding wire

Technical Field

The utility model relates to a nuclear power equipment technical field, specifically speaking relate to a nickel-plated copper mica winding wire.

Background

The nuclear energy is clean, safe and efficient energy, is the only energy nuclear energy which can achieve industrial application and can replace fossil fuel on a large scale at present, and is an effective way for reducing environmental pollution and realizing the coordinated development of economic and ecological environments. In a nuclear power plant, a Control Rod Drive Mechanism (CRDM) is a key device of a nuclear island and plays an important role in the safe operation of the nuclear power plant. The coil winding wire is a matched material in a CRDM coil assembly, is generally formed by wrapping a polyimide film and glass fibers outside a polyimide enameled wire, and has the reliable working environment temperature below 220 ℃.

Chinese patent grant publication no: CN103971800B a winding wire for high temperature resistant solenoid and manufacturing method thereof, wherein, the winding wire includes the copper wire, and the copper wire outer electroplates and forms a nickel layer, still has an adhesive layer outside the nickel layer, and the adhesive layer is outer to wrap around a coating biphenyl type polyimide film and form first around chartered plane, and first around chartered plane is outer to wrap around a coating glass silk and form the second around chartered plane, and second around chartered plane is outer to coat biphenyl type polyimide lacquer and form a lacquer covering.

The said patent uses biphenyl polyimide film and biphenyl polyimide paint with best heat resistance as organic insulating layer to ensure the insulating layer to be complete polyimide PI structure, uses glass fiber as inorganic insulating layer, and uses inorganic and organic mixed insulating structure to ensure the high temperature resistance, high radiation resistance, high insulating property and high tensile strength of winding wire, so that the bar position driving electromagnetic coil made of the winding wire can be stably used in high temperature environment of about 320 deg.C after canceling forced ventilation cooling system. However, with the development of the technology, the requirements for the working temperature and the radiation resistance of the coil are higher and higher, and the winding wire formed by wrapping the conventional polyimide enameled wire with the polyimide film and the glass fiber has large difference in the overall mechanical and electrical properties of the wire due to the fact that the insulation thickness of the wire is thin and the difference of the structural distribution amount of the composite insulation layer directly influences the phenomenon that the high-voltage breakdown and the water voltage resistance value are low, so that the winding wire cannot be suitable for some nuclear power projects.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the above-mentioned problem that exists among the prior art, provide a nickel-plated copper mica winding wire, replace the polyimide enameled wire as the conductive core through nickel-plated copper, increase the nickel-plated copper mica winding wire of mica layer reinforcement structure and begin research and development and application at internal many enterprises.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

A nickel-plated copper mica winding wire comprises a copper conductive core, a nickel-plated layer, an organic silicon resin layer A, a corona-resistant mica layer, a glass fiber layer and an organic silicon resin layer B from inside to outside.

The thickness of the nickel plating layer is less than 1% d, and d is the diameter of the copper conductive core.

The single layer of the corona-resistant mica layer is 360 alkali-free and boron-free glass fiber layers.

The corona resistant mica layer is wrapped with a layer of 0.075mm mica tape reinforced by a corona resistant polyimide film according to the overlapping rate of 50.5-51%.

And a corona resistant mica layer is wound on the organic silicon resin layer A.

The beneficial effect of this application is.

1. Through preheating and evenly covering the semi-solid membrane to the nickel-copper wire, let lead the skin and at first form a layer of high adhesive force insulating layer, promote wire adhesive force and aquatic withstand voltage ability, simultaneously, the organosilicon resin layer of semi-solid state is when further wrapping the package mica layer, can guarantee through the mould and around the resin layer non-adhesion drop when covering the mouth device, and can be inseparable with the laminating of outsourcing mica layer, form fine and close overall structure when further heating solidification, very big promotion wire mechanical and electrical properties.

2. Through the segmented secondary painting and baking process, after the glass filaments are wrapped in the wrapping mode, the glass filaments are baked and semi-cured in the first non-contact section, then the glass filaments enter the second section and the third section for high-temperature baking, the innermost and latest paint layers are guaranteed to be cured completely, the third section is discharged from the furnace, passes through the wire wheel and then is dipped in the paint and baked again, after the two steps, the paint is not painted, and the glass filaments enter the rolling mode after being baked for two rounds in a reciprocating mode, so that the size is uniform and qualified, and the insulating electrical performance can be effectively improved.

3. The thickness of the nickel-plated layer is less than 1% d, which is a standard specified value, and the corresponding thickness has excellent performance indexes such as temperature resistance, corrosion resistance and the like.

4. The thickness of the semi-cured laminating layer is 0.02mm, and if the thickness is larger than the influence on the outer diameter size, the purpose of improving the inner layer insulation performance cannot be achieved.

5. After the two paint dipping and baking processes of curing treatment, the wire is continuously baked twice back and forth under the same temperature control state (without paint dipping), so that the paint dipping wire is uniformly heated, the solvent in the paint liquid is heated and gradually volatilized completely, and simultaneously, the molecular curing reaction is carried out, and a stable insulating layer is gradually formed together with the mica layer and the glass fiber layer.

6. The nickel-plated wire drawing is used for forming the wire, the local wire bending and non-straightening phenomenon can be inevitably generated in the winding and coiling process, and necessary straightening treatment is carried out before the wrapping insulation, so that the wire is straight in the whole advancing process. The treatment process comprises the following steps: two groups of straightening tools are adopted to perform straightening in four directions, namely an upper direction, a lower direction, a left direction and a right direction. Tool specification: every frock respectively installs two sets of high accuracy guide rollers that can quantify the regulation distance that opens and shuts, and every group guide roller is not less than 3, and two sets of deflector rolls are all fixed on two piece upper and lower straight line baffle, and the upper baffle is adjustable, realizes removing on linear guide.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The reference numbers in the figures are: 1. the high-power-factor metal-clad plastic comprises a copper conductive core, 2 a nickel-plated layer, 3 organic silicon resin layers A and 4, a corona-resistant mica layer, 5 a glass fiber layer, 6 and an organic silicon resin layer B.

Detailed Description

Example 1

As shown in fig. 1, a nickel-plated copper mica winding wire comprises, from inside to outside, a copper conductive core 1, a nickel-plated layer 2, a silicone resin layer a3, a corona-resistant mica layer 4, a glass fiber layer 5 and a silicone resin layer B6.

The thickness of the nickel plating layer 2 is less than 1% d, and d is the diameter of the copper conductive core 1.

360 alkali-free and boron-free glass fiber layers 5 are wrapped on the corona-resistant mica layer 4.

The corona resistant mica layer 4 is wrapped with a layer of 0.075mm mica tape reinforced by a corona resistant polyimide film according to the overlapping rate of 50.5-51%.

The organic silicon resin layer A3 is wound with a corona resistant mica layer 4.

A preparation method of a nickel-plated copper mica winding wire comprises the following steps:

a. coating a nickel plating layer 2 on the outer surface of the copper conductive core 1 to form a nickel-copper wire;

b. correcting the nickel-copper wire;

c. preheating the corrected nickel-copper wire at 60-80 ℃, coating the organic silicon resin layer A3 on the nickel-plated layer 2, and baking the organic silicon resin layer A3 at 90-110 ℃ to form a semi-cured coating layer;

d. winding a layer of corona resistant mica layer 4 on the organic silicon resin coating layer A3;

e. wrapping a single layer of 360 alkali-free and boron-free glass fiber layers 5 on the corona-resistant mica layer 4, then impregnating organic silicon resin, and carrying out pre-curing treatment at the temperature of 110-130 ℃ to form an organic silicon resin layer B6;

f. baking and drying at the temperature of 150-160 ℃, keeping the baking and drying for 10-15min, impregnating the whole wire with organic silicon resin, and then performing segmented temperature-controlled baking, paint dipping, baking again and curing treatment to finally form a complete nickel-plated copper mica winding wire.

In the step a, the thickness of the nickel plating layer 2 is less than 1% d, wherein d is the diameter of the copper conductive core 1.

In the step b, the correction treatment comprises four tools, namely an upper tool, a lower tool, a left tool and a right tool, the tools comprise guide rollers and guide plates, the guide rollers are fixed on the guide plates, and at least three guide rollers are installed on the guide plates.

In the step c, the thickness of the semi-solidified laminating layer is 0.02 mm.

In the step d, a layer of 0.075mm corona-resistant polyimide film reinforced dry mica tape is wrapped according to the overlapping rate of 50.5-51%.

In step f, the stage temperature-controlled baking comprises the following steps:

p2, baking the wire baked in the step P1 at 175 ℃ for 5 min;

p3, baking the wire baked in the step P2 at the temperature of 200 ℃ for 5 min;

and P4, impregnating the wire baked in the step P2 with a silicone resin, and repeating the baking steps of P1-P3 three times.

Through preheating and evenly covering the semi-solid membrane to the nickel-copper wire, let lead the skin and at first form a layer of high adhesive force insulating layer, promote wire adhesive force and aquatic withstand voltage ability, simultaneously, the organosilicon resin layer of semi-solid state is when further wrapping the package mica layer, can guarantee through the mould and around the resin layer non-adhesion drop when covering the mouth device, and can be inseparable with the laminating of outsourcing mica layer, form fine and close overall structure when further heating solidification, very big promotion wire mechanical and electrical properties.

Through the segmented secondary painting and baking process, after the glass filaments are wrapped in the wrapping mode, the glass filaments are baked and semi-cured in the first non-contact section, then the glass filaments enter the second section and the third section for high-temperature baking, the innermost and latest paint layers are guaranteed to be cured completely, the third section is discharged from the furnace, passes through the wire wheel and then is dipped in the paint and baked again, after the two steps, the paint is not painted, and the glass filaments enter the rolling mode after being baked for two rounds in a reciprocating mode, so that the size is uniform and qualified, and the insulating electrical performance can be effectively improved.

The thickness of the nickel-plated layer is less than 1% d, which is a standard specified value, and the corresponding thickness has excellent performance indexes such as temperature resistance, corrosion resistance and the like.

The thickness of the semi-cured laminating layer is 0.02mm, and if the thickness is larger than the influence on the outer diameter size, the purpose of improving the inner layer insulation performance cannot be achieved.

After the two paint dipping and baking processes of curing treatment, the wire is continuously baked twice back and forth under the same temperature control state (without paint dipping), so that the paint dipping wire is uniformly heated, the solvent in the paint liquid is heated and gradually volatilized completely, and simultaneously, the molecular curing reaction is carried out, and a stable insulating layer is gradually formed together with the mica layer and the glass fiber layer.

The nickel-plated wire drawing is used for forming the wire, the local wire bending and non-straightening phenomenon can be inevitably generated in the winding and coiling process, and necessary straightening treatment is carried out before the wrapping insulation, so that the wire is straight in the whole advancing process. The treatment process comprises the following steps: two groups of straightening tools are adopted to perform straightening in four directions, namely an upper direction, a lower direction, a left direction and a right direction. Tool specification: every frock respectively installs two sets of high accuracy guide rollers that can quantify the regulation distance that opens and shuts, and every group guide roller is not less than 3, and two sets of deflector rolls are all fixed on two piece upper and lower straight line baffle, and the upper baffle is adjustable, realizes removing on linear guide.

The lead comprises a copper conductive core 1, a nickel-plated layer 2, an organic silicon resin layer A3, a corona-resistant mica layer 4, a glass fiber layer 5 and an organic silicon resin layer B6 from inside to outside.

Table one is the product performance test data as follows:

watch 1

The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.

Claims (3)

1. A nickel-plated copper mica winding wire is characterized in that: the anti-corona mica tape comprises a copper conductive core (1), a nickel plating layer (2), an organic silicon resin layer A (3), a corona resistant mica layer (4), a glass fiber layer (5) and an organic silicon resin layer B (6) from inside to outside.

2. The nickel-plated copper mica winding wire of claim 1, wherein: the thickness of the nickel-plated layer (2) is less than 1% d, and d is the diameter of the copper conductive core (1).

3. The nickel-plated copper mica winding wire of claim 1, wherein: a layer of corona resistant mica layer (4) is wound on the organic silicon resin layer A (3).

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