CN208848639U - A kind of fire resisting electromagnetic wire - Google Patents

Abstract

The utility model relates to a kind of fire resisting electromagnetic wires, belong to field of electrical equipment, including copper strap wire, it is successively surrounded with the first film layer and the second film layer from inside to outside on the outside of copper strap wire, there is the first indent away from the side of copper strap wire in first film layer, there is the second indent close to the side of the first film layer in second film layer, first indent and the cross-shaped state of the second indent after first film layer and the second film layer are close to, the extending direction of copper strap wire is x, the extending direction of first indent and the second indent is symmetrically disposed on the two sides x, angle between first indent and the second indent is θ, the geometric ranges of θ are as follows: 0 ° of 180 ° of < θ <, second film surface is uniformly provided with perforative pin hole.The technical solution passes through the design of the first indent and the second indent, guides the extending direction of crackle, copper strap wire is avoided to be directly exposed in environment；And the air of duplicature inner inclusion when wrapped can be guided and is discharged by the design of the first indent and the second indent, avoid wrapped generation bubble in the process.

Description

A kind of fire resisting electromagnetic wire

Technical field

The utility model relates to a kind of fire resisting electromagnetic wires, belong to field of electrical equipment.

Background technique

Electromagnetic wire is also known as winding wire, is the insulated electric conductor to manufacture coil or winding in electric product.Electromagnetic wire is logical Often it is divided into enameled wire, winding wire, enamel-cover winding wire and inorganic insulated wire.Electromagnetic wire must satisfy in a variety of uses and manufacturing process Requirement, wherein need to have shape in its application process, specification, can work at high temperature in short-term and for a long time, and bear Centrifugal force under judder in certain occasions and high speed, tolerance corona and breakdown under high voltage are resistance under special atmosphere The abilities such as chemical attack；In manufacturing process, wanted when needing to have including coiling and embedding the wire through Tensile, bending and abrasion It asks, and the abilities such as swelling, corrosion function in dipping and drying course.Existing electromagnetic wire is mostly outside copper strap wire around coating Then layer or fibrous layer spray the coating of waterproof or fire resisting on electromagnetic wire surface according to electromagnetic wire application environment, but due to applying Material is difficult to penetrate into film layer, therefore mostly uses single-layer membrane structure greatly, although single-layer membrane structure production procedure is simple, when electricity After magnet-wire long-time use, after film surface cracking, it is easy to cause internal copper strap wire to be directly exposed in environment, there are larger Security risk.

Summary of the invention

To solve problems of the prior art, the utility model provides a kind of electromagnetic wire, can retain fire resisting While function, by the structure that two membranes are wrapped, film layer is avoided to crack in same position.Specific technical solution is as follows:

A kind of fire resisting electromagnetic wire, including copper strap wire, be successively surrounded on the outside of the copper strap wire from inside to outside the first film layer and Second film layer has the first indent away from the side of copper strap wire in first film layer, close to the first film in second film layer The first indent and the second indent are cross-shaped after there is the second indent, first film layer and the second film layer to be close to for the side of layer State, the extending direction of the copper strap wire are x, and the extending direction of first indent and the second indent is symmetrically disposed on the two sides x, institute Stating the angle between the first indent and the second indent is θ, the geometric ranges of θ are as follows: 0 ° of 180 ° of < θ <, second film surface It is uniformly provided with perforative pin hole.

As an improvement of the above technical solution, the angle theta between first indent and the second indent is 90 °.

As an improvement of the above technical solution, glass layer, the glass fibre are also surrounded with outside second film layer Layer is worked out by multiple groups glass fiber.

As an improvement of the above technical solution, fire prevention is evenly distributed between the glass layer and the first film layer to apply Layer.

As an improvement of the above technical solution, the number of the first indent has multiple and the first indent in first film layer It is arranged in parallel between each other, the number of the second indent has multiple and the second indent to set in parallel between each other in second film layer It sets, first indent and the second indent number are identical.

As an improvement of the above technical solution, the depth of first indent and the second indent be L, first film layer and The geometrical relationship with a thickness of D, L and D of second film layer is 0 < L≤0.4D.

As an improvement of the above technical solution, the material of first film layer and the second film layer is polyester or polyimides.

Above-mentioned technical proposal has the advantages that following two:

(1) design for passing through the first indent and the second indent, guides the extending direction of crackle, the first film layer and the second film layer When cracking, the crack orientation of two membranes is different, and copper strap wire is avoided to be directly exposed in environment；

The air of duplicature inner inclusion when wrapped can be guided and is discharged by the design of (2) first indents and the second indent, It avoids generating bubble, improves the reliability of electromagnetic wire, beneficial effect is significant.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of fire resisting electromagnetic wire of the utility model.

Specific embodiment

As shown in Figure 1, the utility model provides a kind of fire resisting electromagnetic wire, including copper strap wire 10,10 outside of copper strap wire is certainly It is successively surrounded with the first film layer 20 and the second film layer 30 from inside to outside, the side that copper strap wire 10 is deviated from the first film layer 20 has first Indent 21 has the second indent 31, the first film layer 20 and the second film layer 30 close to the side of the first film layer 20 in second film layer 30 First indent 21 and the cross-shaped state of the second indent 31 after abutting, the extending direction of copper strap wire 10 are x, the first indent 21 and second The extending direction of indent 31 is symmetrically disposed on the two sides x, and the angle between the first indent 21 and the second indent 31 is θ, the geometry model of θ It encloses are as follows: 0 ° of 180 ° of < θ <, 30 surface of the second film layer are uniformly provided with perforative pin hole 32.

In above scheme, it is provided with the first indent 21 and the second indent 31 in the first film layer 20 and the second film layer 30, first Indent 21 and the second indent 31 are symmetrical arranged along 10 extending direction x of copper strap wire, and there are two the effects of aspect for this setup: the One, after long-term use due to electromagnetic wire, the first film layer 20 and the second film layer 30 are likely to crack, and this programme passes through the The extending direction of one indent 21 and the second indent 31 guidance crackle, due to 31 cross-distribution of the first indent 21 and the second indent, i.e., Make the first film layer 20 and the second film layer 30 while cracking, the crack orientation of two membranes is also different, positioned at the second film of outer layer Layer 30 can cover in the first film layer 20 cracked, therefore copper strap wire 10 will not crack because of film layer and be directly exposed to ring In border；Second, entrained air bubbles, therefore the design of the first indent 21 and the second indent 31 are easy when wrapped using double membrane structure Air can be guided to be discharged, avoid generating bubble.

In above scheme, 30 surface of the second film layer is uniformly provided with perforative pin hole 32, when needs apply on electromagnetic wire surface When covering or impregnating fireproof coating, fireproof coating can be entered between the first film layer 20 and the second film layer 30 by pin hole 32.

In above scheme, the angle between the first indent 21 and the second indent 31 is θ, and the range of θ is 0 ° of 180 ° of < θ <, Design in this way is in order to avoid the first indent 21 and the second indent 31 are overlapped, and the angle of θ is preferably 90 °.

Further, it is also surrounded with glass layer 40 outside the second film layer 30, glass layer 40 is by multiple groups glass fibre Silk 41 is worked out, using the glass layer 40 for the wrapped formation of glass fiber mesh that glass fiber 41 is worked out, glass fibre Fire resistant coating 22 is evenly distributed between layer 40 and the first film layer 20.There are three effects for glass layer 40 in the program: first, The mechanical performance on electromagnetic wire surface can be increased substantially, scratch resistance capability also greatly improves；Second, in the first film layer 20 and When two film layers 30 are cracked, glass layer 40 can be good at fettering the first film layer 20 and the second film layer 30, avoid copper flat Line 10 is directly exposed in environment；Third, when electromagnetic wire surface is coated or impregnated with fireproof coating, coating can pass through netted Glass layer 40 enters 30 surface of the first film layer 20 and the second film layer, and fireproof coating being uniformly distributed between the layers Each layer can be made to form fire resistant coating 22, to improve the service life of electromagnetic wire.

Further, the number of first indent 21 has multiple and the first indent 21 flat between each other in the first film layer 20 Row is arranged, and there is multiple the number of second indent 31 in the second film layer 30, the second indent 31 is arranged in parallel between each other, the first indent 21 is identical with 31 number of the second indent, this first indent 21 and the second indent 31 structure full symmetric in angle and number, The consistency that each region mechanical property of film layer structure can be greatly improved, to improve the service life of electromagnetic wire.

Further, the depth of the first indent 21 and the second indent 31 is L, the thickness of the first film layer 20 and the second film layer 30 Degree is that the geometrical relationship of D, L and D are 0 < L≤0.4D, and the program limits the depth L of the first indent 21 and the second indent 31 It is fixed, it is contemplated that for this indent structure mainly for guidance direction of check and discharge air, depth is unsuitable too deep.

It is provided with two layers of film layer: the first film layer 20 and the second film layer 30 in above scheme on the outside of copper strap wire 10, material can be with Polyester or polyimides are selected, this material is identical as used in electromagnetic wire film-coating technique in the prior art, the second film layer 30 Wrapped 40 material of glass layer of outer layer is glass fibre, and glass fibre has good anti-flammability and electrical insulating property, can The use for greatly improving electromagnetic wire is awaited your instructions.

The embodiments of the present invention are described in detail above, but the content is only the preferable of the utility model Embodiment should not be considered as limiting the scope of the present invention, all to become according to equalization made by the scope of the utility model Change and improve etc., it should still belong within the utility model covering scope.

Claims (7)

1. a kind of fire resisting electromagnetic wire, which is characterized in that including copper strap wire, be successively surrounded with the on the outside of the copper strap wire from inside to outside One film layer and the second film layer have the first indent away from the side of copper strap wire in first film layer, lean in second film layer The first indent and the second indent are in after there is the second indent, first film layer and the second film layer to be close to for the side of nearly first film layer Crossing condition, the extending direction of the copper strap wire are x, and the extending direction of first indent and the second indent is symmetrically disposed on x Two sides, the angle between first indent and the second indent are θ, the geometric ranges of θ are as follows: 0 ° of 180 ° of < θ <, second film Layer surface is uniformly provided with perforative pin hole.

2. a kind of fire resisting electromagnetic wire as described in claim 1, which is characterized in that between first indent and the second indent Angle theta is 90 °.

3. a kind of fire resisting electromagnetic wire as claimed in claim 2, which is characterized in that be also surrounded with glass fibers outside second film layer Layer is tieed up, the glass layer is worked out by multiple groups glass fiber.

4. a kind of fire resisting electromagnetic wire as claimed in claim 3, which is characterized in that between the glass layer and the first film layer It is evenly distributed with fire resistant coating.

5. a kind of fire resisting electromagnetic wire as claimed in claim 4, which is characterized in that the number of the first indent in first film layer There is multiple and the first indent to be arranged in parallel between each other, the number of the second indent has multiple and the second pressure in second film layer Slot is arranged in parallel between each other, and first indent and the second indent number are identical.

6. a kind of fire resisting electromagnetic wire as claimed in claim 5, which is characterized in that the depth of first indent and the second indent For L, the geometrical relationship with a thickness of D, L and D of first film layer and the second film layer is 0 < L≤0.4D.

7. a kind of fire resisting electromagnetic wire as described in claim 1, which is characterized in that the material of first film layer and the second film layer For polyester or polyimides.