A power cable with a hollow rewinding structure

Abstract

The present invention provides a power cable with a hollow rewinding structure, which relates to the technical field of power cables. This power cable with a hollow rewinding structure includes a cable core. The cable core is a hollow copper core structure. A rewinding wire layer is arranged on the outer side of the hollow copper core structure. A number of limiting rings are arranged on the outer side of the rewinding wire layer. The number of the limiting rings is equidistantly arranged along the axial direction of the cable. A heat-dissipating silica gel layer is arranged on the outer side of the rewinding wire layer. An insulating and breathable layer is arranged on the outer side of the heat-dissipating silica gel layer. By adopting a hollow copper core and arranging a rewinding wire layer on the outer side, it can ensure that the cable has sufficient tensile strength. Moreover, the hollow structural design can reduce the overall mass of the power cable, facilitating high-altitude erection and installation. At the same time, the lightweight cable has relatively low requirements for the strength of the support, making it safer.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, and particularly to a power cable with a hollow rewinding structure. Background Art

[0002] Power cables are used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, outgoing lines of power stations, internal power supply in industrial and mining enterprises, and underwater transmission lines across rivers and seas. According to different usage requirements, different requirements are imposed on the cable structure.

[0003] The existing cable structure is a structure in which multiple strands of metal wires are wound or a copper core is directly wrapped with an insulating skin. The overall quality is relatively large. When erecting cables at high altitudes, the heavier cables are not conducive to erection and affect safety. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a power cable with a hollow rewinding structure, which solves the problems of great difficulty in erecting cables at high altitudes and potential safety hazards.

[0006] (2) Technical Solutions

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A power cable with a hollow rewinding structure includes a cable core. The cable core is a hollow copper core structure. A rewinding wire layer is provided on the outer side of the hollow copper core structure. A plurality of limiting rings are provided on the outer side of the rewinding wire layer. The plurality of limiting rings are arranged at equal intervals along the axial direction of the cable. A heat-dissipating silica gel layer is provided on the outer side of the rewinding wire layer. An insulating and breathable layer is provided on the outer side of the heat-dissipating silica gel layer;

[0008] An interface end is provided at the end of the cable. The shape of the interface end is cylindrical. A partition plate is provided inside the interface end. The end of the cable is inserted into the inside of the interface end, and a copper sheet is provided between the end of the cable and the end of the partition plate.

[0009] Preferably, the rewinding wire layer is provided with multiple layers.

[0010] Preferably, the rewinding wire layer is formed by winding a plurality of fine metal wires, and a gap is formed between adjacent two fine metal wires. A clamping block is provided inside the limiting ring, and the clamping block is located inside the gap.

[0011] Preferably, the material of the interface end is copper or aluminum, and an insulating layer is provided on the outer side of the interface end.

[0012] Preferably, the partition plate is fixedly connected to the middle inside the interface end, so that insertion openings are formed at both the left and right ends of the partition plate.

[0013] Preferably, the material of the limiting ring is the same as that of the rewinding wire layer.

[0014] Preferably, the insulating and breathable layer is woven with wear-resistant silk threads.

[0015] Preferably, the hollow copper core structure includes a copper pipe layer, and an outer attachment layer one, an outer attachment layer two, and an outer attachment layer three are sequentially arranged on the outer side of the copper pipe layer. The outer attachment layer one, the outer attachment layer two, and the outer attachment layer three are all composed of a plurality of fan-shaped copper sheets arranged in an annular array.

[0016] (III) Beneficial effects

[0017] The present invention provides a power cable with a hollow rewinding structure, having the following beneficial effects:

[0018] 1. By adopting a hollow copper core and arranging a rewinding wire layer on the outer side, it can ensure that the cable has sufficient tensile strength, and the hollow structural design can reduce the overall mass of the power cable, facilitating high-altitude erection and installation. At the same time, the lightweight cable has relatively low requirements for the strength of the support, making it safer.

[0019] 2. By arranging a limiting ring on the periphery of the rewinding wire layer, the limiting ring can limit the outward expansion of the rewinding wire layer (the rewinding wire layer has an outward stress), avoiding damage to the outer heat-dissipating silica gel layer and the insulating and breathable layer. The heat-dissipating silica gel layer can play a role in waterproofing and heat dissipation, and the insulating and breathable layer adopts a woven layer, which has a certain wear resistance while ensuring breathability, and the use effect is very good. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a perspective view of a power cable with a hollow rewinding structure proposed by the present invention;

[0021] Figure 2 is a front view of a power cable with a hollow rewinding structure proposed by the present invention;

[0022] Figure 3 is another perspective view of a power cable with a hollow rewinding structure proposed by the present invention;

[0023] Figure 4 is Figure 3 the enlarged view at A in

[0024] Figure 5 is a perspective view of the limiting ring of a power cable with a hollow rewinding structure proposed by the present invention;

[0025] Figure 6 is a perspective view of the connection end of a power cable with a hollow rewinding structure proposed by the present invention.

[0026] Among them, 1. Hollow copper core structure; 11. Copper tube layer; 12. Outer attachment layer 1; 13. Outer attachment layer 2; 14. Outer attachment layer 3; 2. Rewound wire layer; 3. Gap opening; 4. Restriction ring; 5. Block; 6. Heat dissipation silica gel layer; 7. Insulating and breathable layer; 8. Interface end; 9. Partition plate; 10. Copper sheet. Specific implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment 1:

[0029] As Figures 1-6 shown, the embodiment of the present invention provides a hollow rewound structure power cable, including a cable core. The cable core is a hollow copper core structure 1. A rewound wire layer 2 is arranged on the outer side of the hollow copper core structure 1. The rewound wire layer 2 is provided with multiple layers. According to the cross-sectional area of the hollow copper core structure 1, the corresponding number of layers of the rewound wire layer 2 is selected. The rewound wire layer 2 is wound by multiple fine metal wires. The diameter of the fine metal wires near the outside gradually becomes smaller. A number of restriction rings 4 are arranged on the outer side of the rewound wire layer 2. The number of restriction rings 4 is arranged at equal intervals along the axial direction of the cable. The restriction rings 4 contract the rewound wire layer 2, which can effectively prevent the rewound wire layer 2 from loosening outward. A heat dissipation silica gel layer 6 is arranged on the outer side of the rewound wire layer 2. The inner side of the heat dissipation silica gel layer 6 is attached to the outer sides of the rewound wire layer 2 and the hollow copper core structure 1, which can accelerate the heat dissipation of the rewound wire layer 2 and the hollow copper core structure 1. An insulating and breathable layer 7 is arranged on the outer side of the heat dissipation silica gel layer 6. The insulating and breathable layer 7 can protect the outer side of the heat dissipation silica gel layer 6, but does not affect the heat dissipation on the outer side of the heat dissipation silica gel layer 6, so as to achieve a better heat dissipation effect;

[0030] An interface end 8 is arranged at the end of the cable. The material of the interface end 8 is copper or aluminum, both of which are materials with good electrical conductivity. An insulating layer is arranged on the outer side of the interface end 8 to play a safety role. The shape of the interface end 8 is set as a cylindrical shape. A partition plate 9 is arranged inside the interface end 8. The partition plate 9 is fixedly connected to the middle part inside the interface end 8, so that insertion openings are formed at both the left and right ends of the partition plate 9. In this way, one interface end 8 can be connected to the ends of the cable at both ends. The end of the cable is inserted into the inside of the interface end 8, and a copper sheet 10 is arranged between the end of the cable and the end of the partition plate 9. The material of the copper sheet is the same as that of the hollow copper core structure 1, both of which are copper, so the electrical conductivity between them will be better;

[0031] In actual application, first cut a cable of appropriate length according to requirements, and then install the interface end 8 at both ends of the cable.

[0032] The rewinding wire layer 2 is formed by winding a plurality of thin metal wires, and a gap 3 is formed between adjacent two thin metal wires. The inner side of the heat dissipation silica gel layer 6 will penetrate into the gap 3, so as to assist the hollow copper core structure 1 in heat dissipation. A clamping block 5 is arranged on the inner side of the limiting ring 4, and the clamping block 5 is located inside the gap 3, so that the axial sliding of the clamping block 5 can be restricted. In actual situations, the heat dissipation silica gel layer 6 will also be bonded to the limiting ring 4 to assist the limiting ring 4 in heat dissipation.

[0033] Optionally, the material of the limiting ring 4 is the same as that of the rewinding wire layer 2, which can improve the conductive effect and reduce the power transmission between different materials inside the cable.

[0034] Working principle: When in use, it is necessary to install the interface end 8 at the end of the cable, and use a large pliers to squeeze and deform the interface end 8 to tightly fix it to the outside of the rewinding wire layer 2. At this time, the copper sheet 10 will block the end of the hollow copper core structure 1, so that both ends of the inner hollow structure of the hollow copper core structure 1 are blocked, and the inner side of the hollow copper core structure 1 is in a closed state and will not be affected by moisture.

[0035] The heat dissipation silica gel layer 6 will quickly transfer the heat to the outside, and then transfer the heat to the outside through the insulating and breathable layer 7, so as to avoid the concentration of heat in the cable during the power-on process and affect the service life of the cable.

[0036] The hollow copper core structure 1 includes a copper tube layer 11. An outer attachment layer one 12, an outer attachment layer two 13, and an outer attachment layer three 14 are sequentially arranged on the outside of the copper tube layer 11. The outer attachment layer one 12, the outer attachment layer two 13, and the outer attachment layer three 14 are all composed of a plurality of fan-shaped copper sheets arranged in an annular array, and the gaps between the fan-shaped copper sheets are staggered from each other, and the inner and outer layers are mutually attached.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hollow rewound structure power cable, comprising a cable core, characterized in that: The cable core is a hollow copper core structure (1). A rewinding wire layer (2) is arranged on the outer side of the hollow copper core structure (1). A plurality of limiting rings (4) are arranged on the outer side of the rewinding wire layer (2). The plurality of limiting rings (4) are arranged at equal intervals along the axial direction of the cable. A heat dissipation silica gel layer (6) is arranged on the outer side of the rewinding wire layer (2). An insulating and breathable layer (7) is arranged on the outer side of the heat dissipation silica gel layer (6); An interface end (8) is arranged at the end of the cable. The shape of the interface end (8) is cylindrical. A partition plate (9) is arranged on the inner side of the interface end (8). The end of the cable is inserted into the inside of the interface end (8), and a copper sheet (10) is arranged between the end of the cable and the end of the partition plate (9); The hollow copper core structure (1) includes a copper pipe layer (11). An outer attachment layer one (12), an outer attachment layer two (13), and an outer attachment layer three (14) are sequentially arranged on the outer side of the copper pipe layer (11). The outer attachment layer one (12), the outer attachment layer two (13), and the outer attachment layer three (14) are all composed of a plurality of fan-shaped copper sheets arranged in an annular array.

2. The power cable with a hollow rewinding structure according to claim 1, characterized in that: The rewinding wire layer (2) is provided with multiple layers.

3. The power cable with a hollow rewinding structure according to claim 1 or 2, characterized in that: The rewinding wire layer (2) is wound by a plurality of fine metal wires, and a gap (3) is formed between adjacent two fine metal wires. A clamping block (5) is arranged on the inner side of the limiting ring (4), and the clamping block (5) is located inside the gap (3).

4. The hollow rewinding structure power cable according to claim 1, characterized in that: The material of the interface end (8) is copper or aluminum, and an insulating layer is arranged on the outer side of the interface end (8).

5. The hollow rewinding structure power cable according to claim 1, characterized in that: The partition plate (9) is fixedly connected to the middle of the inner side of the interface end (8), so that insertion openings are formed at both the left and right ends of the partition plate (9).

6. The hollow rewinding structure power cable according to claim 3, wherein: The material of the limiting ring (4) is the same as that of the rewinding wire layer (2).

7. The medium-voltage power cable with a hollow rewinding structure according to claim 1, characterized in that: The insulating and breathable layer (7) is woven by wear-resistant silk threads.

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