Low-smoke halogen-free bending-resistant cable

Abstract

The utility model discloses a low-smoke halogen-free bending-resistant cable, which belongs to the field of cables and comprises a cable distribution layer and an outer protective layer for protecting the cable distribution layer, the cable distribution layer comprises a plurality of cable cores distributed circumferentially, a coating layer is arranged on the periphery of the cable cores, a high-temperature insulating layer is arranged on the periphery of the coating layer, and the high-temperature insulating layer is arranged on the periphery of the high-temperature insulating layer. A supporting reinforcing rib layer matched with the adjacent cable cores is arranged between the adjacent cable cores; the outer sheath comprises a high-temperature glass fiber tape outer wrapping layer arranged on the periphery of the cable distribution layer in a sleeving mode, a steel wire armor layer is arranged on the periphery of the high-temperature glass fiber tape outer wrapping layer, an anti-bending layer is arranged on the periphery of the steel wire armor layer, and a low-smoke halogen-free polyolefin outer sheath is arranged on the periphery of the anti-bending layer. The low-smoke halogen-free anti-bending cable is strong in anti-bending capability and suitable for outdoor installation and use.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a low-smoke, halogen-free, anti-bending cable. Background Art

[0002] Low smoke halogen-free cable refers to an environmentally friendly cable made of rubber materials that does not contain halogen (F, Cl, Br, I, At) and environmental substances such as lead, cadmium, chromium, and mercury, and does not emit toxic smoke (such as hydrogen halide, carbon monoxide, carbon dioxide, etc.) when burned. Low smoke halogen-free cables are prone to twisting and bending when installed and pulled outdoors, which not only causes the cable to crack and break, but also is not conducive to the normal use of constant temperature DC high-voltage cables, thus causing disadvantages. Based on this, the utility model proposes a low smoke halogen-free anti-bending cable. Utility Model Content

[0003] The utility model aims to provide a low-smoke, halogen-free, anti-bending cable to solve the above-mentioned problems.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The utility model discloses a low-smoke halogen-free anti-bending cable, comprising a cable distribution layer and an outer sheath protecting the cable distribution layer, wherein the cable distribution layer comprises a plurality of cable cores distributed circumferentially, a coating layer is arranged on the outer periphery of the cable core, a high-temperature insulating layer is arranged on the outer periphery of the coating layer, and a supporting reinforcing rib layer matched with the cable cores is arranged between adjacent cable cores; the outer sheath comprises a high-temperature glass fiber tape outer sheath sleeved on the outer periphery of the cable distribution layer, a steel wire armor layer is arranged on the outer periphery of the high-temperature glass fiber tape outer sheath, an anti-bending layer is arranged on the outer periphery of the steel wire armor layer, and a low-smoke halogen-free polyolefin outer sheath is arranged on the outer periphery of the anti-bending layer.

[0006] Furthermore, the coating layer is a unidirectional spiral wrapping structure.

[0007] Furthermore, the anti-bending layer is composed of a plurality of stabilizing units, which include a supporting ball located in the center and three supporting balls distributed around it, wherein the three supporting balls are distributed in an equilateral triangle, and the distances between the three supporting balls and the center supporting ball are consistent; adjacent supporting balls are fixedly connected by supporting rods.

[0008] Furthermore, the six adjacent support balls are distributed in a hexagon.

[0009] Furthermore, the supporting reinforcing rib layer is in contact and connected with the inner wall of the high-temperature glass fiber tape outer wrapping layer and the outer wall of the adjacent high-temperature insulating layer.

[0010] Compared with the prior art, the beneficial technical effects of the utility model are:

[0011] The utility model low-smoke halogen-free anti-bending cable can evenly disperse the external force of extrusion through the anti-bending layer, thereby improving the anti-bending ability; in addition, the support balls and support rods of the anti-bending layer are distributed in a hexagonal shape, so that it has the same strength and stability in different directions. Since each corner of the hexagon is supported by three adjacent sides, the pressure balance is optimized, thereby ensuring the firmness of the texture and improving the anti-bending ability of the overall structure. In short, the utility model low-smoke halogen-free anti-bending cable has strong anti-bending ability and is suitable for outdoor installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model will be further described below in conjunction with the accompanying drawings.

[0013] Figure 1 This is a cross-sectional view of the utility model low-smoke halogen-free anti-bending cable;

[0014] Figure 2 This is a schematic diagram of the structure of the low-smoke, halogen-free, anti-bending cable of the utility model;

[0015] Figure 3 This is the main view of the anti-bending layer;

[0016] Explanation of the accompanying drawings: 1. Cable core; 2. Coating layer; 3. High-temperature insulation layer; 4. Support reinforcement layer; 5. High-temperature glass fiber tape outer sheath; 6. Steel wire armor layer; 7. Anti-bending layer; 701. Support ball; 702. Support rod; 8. Low-smoke halogen-free polyolefin outer sheath. DETAILED DESCRIPTION

[0017] like Figure 1-3 As shown, a low-smoke halogen-free bending-resistant cable comprises a cable distribution layer and an outer sheath protecting the cable distribution layer. The cable distribution layer comprises a plurality of cable cores 1 distributed circumferentially. In this embodiment, the number of the cable cores 1 is three.

[0018] The outer periphery of the cable core 1 is provided with a coating layer 2, and the coating layer 2 is a unidirectional spiral wrapping structure. The outer periphery of the coating layer 2 is provided with a high-temperature insulation layer 3, and the high-temperature insulation layer 3 is wrapped in a unidirectional spiral wrapping structure as above, so that there will be no misalignment and movement to generate gaps, and the high-temperature insulation layer 3 is effectively prevented from melting and penetrating through the gaps to contact the inner conductor during a fire, so that the fire resistance of the cable is more excellent, and the safety and reliability of the cable are improved.

[0019] A supporting reinforcement layer 4 is installed between adjacent cable cores 1. The supporting reinforcement layer 4 is in contact and connected with the inner wall of the high-temperature glass fiber tape outer wrapping layer 5 and the outer wall of the adjacent high-temperature insulation layer 3, playing a certain supporting and fixing role, and further enhancing the bending and compression resistance.

[0020] The outer sheath includes a high-temperature glass fiber tape outer wrapping layer 5 sleeved around the outer periphery of the cable distribution layer, and a steel wire armor layer 6 is installed around the outer periphery of the high-temperature glass fiber tape outer wrapping layer 5, and a layer of metal protection is added to prevent the internal utility layer from being damaged during transportation and installation. An anti-bending layer 7 is installed around the outer periphery of the steel wire armor layer 6, and a low-smoke halogen-free polyolefin outer sheath 8 is installed around the outer periphery of the anti-bending layer 7.

[0021] The anti-bending layer 7 is composed of a plurality of stabilizing units, which include a support ball 701 located in the center and three support balls 701 distributed around it. The three support balls 701 are distributed in an equilateral triangle, and the distances between the three support balls 701 and the support ball 701 at the center are consistent. Adjacent support balls 701 are fixedly connected by support rods 702.

[0022] The six adjacent support balls 701 are distributed in a hexagonal shape. The hexagon is a stable structure because its shape and structure can balance the internal forces to the maximum extent, thereby reducing the distortion and deformation of the structure. In addition, the hexagon has equal angles and equal side lengths, which makes it have the same strength and stability in different directions. Since each corner of the hexagon is supported by three adjacent sides, the pressure balance is optimized, thereby ensuring the firmness of the texture, thereby effectively improving the bending resistance of the low-smoke halogen-free cable.

[0023] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A low-smoke, halogen-free, anti-bending cable, characterized by: The invention comprises a cable distribution layer and an outer sheath for protecting the cable distribution layer, wherein the cable distribution layer comprises a plurality of cable cores (1) distributed in a circle, a sheath (2) is arranged on the outer periphery of the cable cores (1), a high-temperature insulation layer (3) is arranged on the outer periphery of the sheath (2), and a supporting reinforcing rib layer (4) matching with the cable cores (1) is arranged between adjacent cable cores (1); the outer sheath comprises a high-temperature glass fiber tape outer sheath (5) sleeved on the outer periphery of the cable distribution layer, a steel wire armor layer (6) is arranged on the outer periphery of the high-temperature glass fiber tape outer sheath (5), an anti-bending layer (7) is arranged on the outer periphery of the steel wire armor layer (6), and a low-smoke halogen-free polyolefin outer sheath (8) is arranged on the outer periphery of the anti-bending layer (7).

2. The low-smoke halogen-free bending-resistant cable according to claim 1, characterized in that: The coating layer (2) is a unidirectional spirally wrapped structure.

3. The low-smoke halogen-free bending-resistant cable according to claim 1, characterized in that: The anti-bending layer (7) is composed of a plurality of stabilizing units, wherein the stabilizing units include a supporting ball (701) located in the center and three supporting balls (701) distributed around the supporting ball (701), wherein the three supporting balls (701) are distributed in an equilateral triangle, and the distances between the three supporting balls (701) and the supporting ball (701) in the center are consistent; adjacent supporting balls (701) are fixedly connected by supporting rods (702).

4. The low-smoke halogen-free bending-resistant cable according to claim 3, characterized in that: The six adjacent support balls (701) are distributed in a hexagonal shape.

5. The low-smoke halogen-free bending-resistant cable according to claim 1, characterized in that: The supporting reinforcing rib layer (4) is in contact and connected with the inner wall of the high-temperature glass fiber tape outer wrapping layer (5) and the outer wall of the adjacent high-temperature insulating layer (3).

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