Self-adhesive transposed conductor

Abstract

The invention belongs to the technical field of transposed conductors, and discloses a self-adhesive transposed conductor, which comprises an enameled conductor main body, a flame-retardant sleeve is arranged outside the enameled conductor main body, the flame-retardant sleeve comprises an inner sleeve body and an outer sleeve body, a gap is reserved between the inner sleeve body and the outer sleeve body to form a hollow interlayer, and a plurality of partition plates are arranged between the inner sleeve body and the outer sleeve body. The partition plates are arranged at intervals in the length direction of the enameled wire body and divide the hollow interlayer into a plurality of closed cavities, and each closed cavity is filled with a fire extinguishing agent. According to the self-adhesive transposed conductor, the flame-retardant sleeve is arranged outside the enameled conductor main body, and the fire extinguishing agent is filled in the flame-retardant sleeve, so that a layer of flame-retardant defense line is formed, and when the enameled conductor main body generates a fire, the flame-retardant sleeve is broken due to burning and the fire extinguishing agent leaks, so that the fire is extinguished and is prevented from further spreading, and the self-adhesive transposed conductor is safer to use; and stable power transmission is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of transposed conductors, in particular to a self-adhesive transposed conductor. Background Art

[0002] The windings of large power transformers use transposed conductors, which can significantly reduce load losses, reduce the temperature rise of winding hot spots, improve the mechanical strength of the windings, make the structure more compact, and make coil processing easier. Therefore, it has been widely used in the design and manufacture of large power transformer windings.

[0003] Self-adhesive transposed conductors use self-adhesive paint as an outer coating to further enhance the short-circuit resistance of the conductors. Compared with ordinary transposed conductors, they have improved mechanical strength, greater insulation thickness and higher electrical performance. However, existing self-adhesive transposed conductors lack flame-retardant structures. If a fire caused by a short circuit cannot be handled in time, the danger will increase. Summary of the invention

[0004] Based on the above problems, an object of the present invention is to provide a self-adhesive transposed conductor to improve the flame retardancy and use safety of the transposed conductor.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A self-adhesive transposed conductor comprises an enameled conductor body, a flame retardant sleeve is arranged outside the enameled conductor body, the flame retardant sleeve comprises an inner sleeve body and an outer sleeve body, a gap is left between the inner sleeve body and the outer sleeve body to form a hollow interlayer, and a plurality of partition plates are arranged between the inner sleeve body and the outer sleeve body, each partition plate is arranged at intervals along the length direction of the enameled conductor body, and divides the hollow interlayer into a plurality of closed cavities, each of which is filled with a fire extinguishing agent.

[0007] As an optional solution, the closed chamber is also filled with compressed gas.

[0008] As an optional solution, a fixing ring is provided on the surface of the enameled wire body, a temperature measuring patch is provided in the fixing ring, and a connecting wire leading to the outside is provided on the temperature measuring patch.

[0009] As an optional solution, a plurality of fixing rings are distributed at equal intervals along the length direction of the enameled wire body.

[0010] As an optional solution, the cross-section of the enameled wire body is a flat rectangular shape, and fixing rings are provided on the upper surface and the lower surface of the enameled wire body.

[0011] As an optional solution, a heat-resistant sleeve is arranged outside the flame-retardant sleeve, and an outer sheath is arranged outside the heat-resistant sleeve.

[0012] As an option, the heat-resistant sleeve is made of fiberglass and coated with iron oxide red silicone.

[0013] As an optional solution, the outer sheath comprises multiple layers of electrical insulation paper wrapped around the outer surface of the heat-resistant sheath.

[0014] The beneficial effects of the present invention are as follows: the self-adhesive transposed conductor forms a flame retardant defense line by arranging a flame retardant sleeve outside the enameled conductor body and filling the flame extinguishing agent in the flame retardant sleeve. When a fire occurs in the enameled conductor body, the flame retardant sleeve will rupture due to burning, and the fire extinguishing agent will leak, thereby extinguishing the fire and preventing the fire from spreading further, making the use safer and ensuring stable power transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a self-adhesive transposed conductor provided by an embodiment of the present invention;

[0016] Figure 2 It is a schematic vertical cross-sectional view of a flame retardant sleeve in a self-adhesive transposed conductor provided in an embodiment of the present invention.

[0017] In the attached figure:

[0018] 1. Enameled wire body; 2. Flame retardant sleeve; 21. Inner sleeve; 22. Outer sleeve; 23. Partition plate; 24. Closed cavity; 3. Fire extinguishing agent; 4. Fixing ring; 5. Temperature measuring patch; 6. Connecting wire; 7. Heat-resistant sleeve; 8. Outer sheath. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0022] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0023] See also Figure 1 and Figure 2 As shown, the preferred embodiment provides a self-adhesive transposed conductor, including an enameled conductor body 1, a flame retardant sleeve 2 is arranged outside the enameled conductor body 1, the flame retardant sleeve 2 includes an inner sleeve 21 and an outer sleeve 22, a gap is left between the inner sleeve 21 and the outer sleeve 22 to form a hollow interlayer, and a plurality of partition plates 23 are arranged between the inner sleeve 21 and the outer sleeve 22, each partition plate 23 is arranged at intervals along the length direction of the enameled conductor body 1, and the hollow interlayer is divided into a plurality of closed cavities 24, each of which is filled with a fire extinguishing agent 3.

[0024] Therefore, by arranging a flame retardant sleeve 2 outside the enameled wire body 1 and filling the fire extinguishing agent 3 in the flame retardant sleeve 2, a flame retardant defense line is formed. When a fire occurs in the enameled wire body 1, the flame retardant sleeve 2 will rupture due to burning, and the fire extinguishing agent 3 will leak, thereby extinguishing the fire and preventing the fire from spreading further, making it safer to use and ensuring stable power transmission.

[0025] Furthermore, the closed cavity 24 is also filled with compressed gas, which is an inert gas. The compressed gas forms a high pressure in the closed cavity 24, which is conducive to spraying out the fire extinguishing agent 3 when the flame retardant sleeve 2 is broken, thereby improving the fire extinguishing effect.

[0026] Optionally, a fixing ring 4 is provided on the surface of the enameled wire body 1 , a temperature measuring patch 5 is provided in the fixing ring 4 , and a connecting wire 6 leading to the outside is provided on the temperature measuring patch 5 .

[0027] Therefore, the temperature of the enameled copper flat wire is monitored by the temperature measuring patch 5, and the connecting wire 6 is connected to the external temperature display, so that the staff can know the internal temperature of the transposed conductor at any time to avoid accidents caused by excessively high temperature in a local position without timely discovery.

[0028] Furthermore, a plurality of fixing rings 4 are distributed at equal intervals along the length direction of the enameled wire body 1 to perform real-time monitoring of multiple sections of the transposed wire.

[0029] Furthermore, the cross-section of the enameled wire body 1 is a flat rectangular shape, and fixing rings 4 are provided on the upper and lower surfaces of the enameled wire body 1. The temperature measuring patches 5 are evenly arranged according to the shape of the enameled wire body 1 to reduce the monitoring blind area.

[0030] Optionally, a heat-resistant sleeve 7 is provided outside the flame-retardant sleeve 2, and an outer sheath 8 is provided outside the heat-resistant sleeve 7. The heat-resistant sleeve 7 is used to improve the heat resistance of the transposed conductor, and the outer sheath 8 is used to provide insulation and protection.

[0031] Furthermore, the heat-resistant sleeve 7 is made of glass fiber and the surface is covered with iron oxide red silica gel, which is not damaged by high temperature and flame, and has the properties of flame retardancy, heat insulation, heat preservation, anti-electricity, and softness.

[0032] Furthermore, the outer sheath 8 includes multiple layers of electrical insulation paper wrapped around the outer surface of the heat-resistant sleeve 7. The electrical insulation paper has good insulation, heat resistance, durability, chemical compatibility, low temperature performance, insensitivity to moisture, radiation resistance, non-toxicity, flame retardancy, etc., and can meet the surface protection requirements of the transposed conductor.

[0033] In summary, a flame retardant sleeve 2, a heat-resistant sleeve 7 and an outer sheath 8 are sequentially arranged on the surface of the enameled wire body 1, and the flame retardant sleeve 2 is filled with a fire extinguishing agent 3 to prevent the spread of fire in the event of spontaneous combustion. The heat-resistant sleeve 7 and the outer sheath 8 further isolate and protect the internal structure; in addition, the temperature of the internal enameled wire body 1 is monitored by the temperature measuring patch 5 so as to detect abnormal conditions in time and eliminate the causes of the abnormalities as much as possible before the fire occurs, thereby effectively improving the safety of the self-adhesive transposed wire.

[0034] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Self-adhesive transposed conductor, characterized in that: The invention comprises an enameled wire body (1), wherein a flame retardant sleeve (2) is arranged outside the enameled wire body (1), wherein the flame retardant sleeve (2) comprises an inner sleeve body (21) and an outer sleeve body (22), wherein a gap is left between the inner sleeve body (21) and the outer sleeve body (22) to form a hollow interlayer, and a plurality of partition plates (23) are arranged between the inner sleeve body (21) and the outer sleeve body (22), wherein each of the partition plates (23) is arranged at intervals along the length direction of the enameled wire body (1) and divides the hollow interlayer into a plurality of closed cavities (24), wherein each of the closed cavities (24) is filled with a fire extinguishing agent (3).

2. The self-adhesive transposed conductor according to claim 1, characterized in that: The closed chamber (24) is also filled with compressed gas.

3. The self-adhesive transposed conductor according to claim 1, characterized in that: A fixing ring (4) is provided on the surface of the enameled wire body (1), a temperature measuring patch (5) is provided in the fixing ring (4), and a connecting wire (6) leading to the outside is provided on the temperature measuring patch (5).

4. The self-adhesive transposed conductor according to claim 3, characterized in that: The plurality of fixing rings (4) are distributed at equal intervals along the length direction of the enameled wire body (1).

5. The self-adhesive transposed conductor according to claim 3, characterized in that: The cross section of the enameled wire body (1) is in a flat rectangular shape, and the fixing ring (4) is provided on both the upper surface and the lower surface of the enameled wire body (1).

6. The self-adhesive transposed conductor according to claim 1, characterized in that: A heat-resistant sleeve (7) is arranged outside the flame-retardant sleeve (2), and an outer protective sleeve (8) is arranged outside the heat-resistant sleeve (7).

7. The self-adhesive transposed conductor according to claim 6, characterized in that: The heat-resistant sleeve (7) is made of glass fiber, and its surface is covered with iron oxide red silica gel.

8. The self-adhesive transposed conductor according to claim 6, characterized in that: The outer sheath (8) comprises multiple layers of electrical insulating paper wrapped around the outer surface of the heat-resistant sheath (7).

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