Halogen-free flame-retardant cable

Abstract

The utility model belongs to the technical field of cables, and particularly relates to a halogen-free flame-retardant cable, which comprises a cable body and a plurality of wire cores, the cable body comprises a low-smoke halogen-free jacket, the inner side wall of the low-smoke halogen-free jacket is provided with a flame-retardant layer, the inner side wall of the flame-retardant layer is provided with an oxygen-free copper encrypted netting layer, and the inner side wall of the oxygen-free copper encrypted netting layer is provided with a flame-retardant layer. A plurality of fixing strips are arranged on the inner side wall of the oxygen-free copper densified netting layer, an oxygen isolation layer is arranged on the inner side walls of the fixing strips, the wire cores are all located in the oxygen isolation layer, guide strips are arranged among the wire cores, oxygen and heat can be isolated through cooperation of the fireproof layer, the oxygen isolation layer and the low-smoke halogen-free outer sleeve, the cable body can bear high temperature, and the service life of the cable body is prolonged. Therefore, the flame-retardant effect is improved, the tensile and anti-pressure capabilities of the cable body are improved, the service life of the cable body is prolonged, and the risk of cable damage or breakage caused by overlarge stress is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, specifically a halogen-free flame-retardant cable. Background Technology

[0002] Cables are made of one or more mutually insulated conductors and an outer insulating protective layer, and are wires that transmit electricity or information from one place to another. Low-smoke halogen-free flame-retardant cables are made of thermoplastic or thermosetting materials that produce low smoke emissions when heated and do not contain halogens. They are not easily combusted in actual use and can reduce the toxic and corrosive gases produced when heated, thus reducing pollution to the surrounding environment and providing higher safety.

[0003] During use, halogen-free flame-retardant cables are subjected to frequent bending, winding, and dragging mechanical stresses. After prolonged use, the outer side of the cable experiences significant pressure, leading to cracks and affecting its service life. Summary of the Invention

[0004] The purpose of this invention is to provide a halogen-free flame-retardant cable that improves the tensile and compressive strength of the cable body, extends its service life, and reduces the risk of cable damage or breakage due to excessive stress.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a halogen-free flame-retardant cable, comprising a cable body and multiple conductors, wherein the cable body includes a low-smoke halogen-free jacket, the inner wall of the low-smoke halogen-free jacket is provided with a fire-resistant layer, the inner wall of the fire-resistant layer is provided with an oxygen-free copper dense braided mesh layer, the inner wall of the oxygen-free copper dense braided mesh layer is provided with multiple fixing strips, the inner wall of the multiple fixing strips is provided with an oxygen barrier layer, the multiple conductors are all located inside the oxygen barrier layer, and guide strips are provided between the multiple conductors;

[0006] The outer wall of the fixing strip has a through hole.

[0007] To ensure the durability of the fireproof effect, isolate the fire source, and prevent the fire from spreading, the fire-resistant layer of the preferred halogen-free flame-retardant cable of this utility model is made of fireproof wrapping tape.

[0008] In order to isolate oxygen and heat and thus prevent further combustion of the cable, the oxygen barrier layer of the preferred embodiment of the halogen-free flame-retardant cable of this utility model is made of ceramicized silicone rubber.

[0009] In order to provide insulation for the conductor, in a preferred embodiment of the halogen-free flame-retardant cable of this invention, a heat insulation layer is provided on the outer wall of the conductor, and an insulating pad is provided on the outer wall of the heat insulation layer that abuts against the outer wall of the guide strip.

[0010] In order to provide heat insulation for the conductor, the heat insulation layer of the preferred halogen-free flame-retardant cable of this utility model is made of multi-layer mica tape.

[0011] To prevent cable aging, as a preferred embodiment of this utility model of a halogen-free flame-retardant cable, the outer wall of the low-smoke halogen-free jacket is coated with an anti-aging layer.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention utilizes a combination of a fire-resistant layer, an oxygen-barrier layer, and a low-smoke halogen-free jacket to isolate oxygen and heat, enabling the cable body to withstand high temperatures and resist melting, thus ensuring the durability of the fireproof effect, isolating the fire source, preventing the spread of fire, and improving the flame-retardant effect. The outer wall of the low-smoke halogen-free jacket is coated with an anti-aging layer containing ultraviolet absorbers to prevent the cable body from being exposed to sunlight for extended periods. Furthermore, the oxygen-free copper dense braided mesh layer increases the mesh density and cable body strength. Simultaneously, the guide strips enhance the cable body's tensile and compressive strength, extending its service life and reducing the risk of cable damage or breakage due to excessive stress. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall right-side cross-sectional structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the fixing strip of this utility model.

[0017] In the diagram: 1. Cable body; 2. Low-smoke halogen-free jacket; 3. Fire-resistant layer; 4. Oxygen-free copper reinforced braided layer; 5. Fixing strip; 501. Through hole; 6. Oxygen barrier layer; 7. Wire core; 701. Heat insulation layer; 702. Insulating pad; 8. Guide strip. Detailed Implementation

[0018] Please see Figures 1 to 3 A halogen-free flame-retardant cable includes a cable body 1 and multiple conductors 7. The cable body 1 includes a low-smoke halogen-free jacket 2. The inner wall of the low-smoke halogen-free jacket 2 is provided with a fire-resistant layer 3. The inner wall of the fire-resistant layer 3 is provided with an oxygen-free copper dense braided mesh layer 4. The inner wall of the oxygen-free copper dense braided mesh layer 4 is provided with multiple fixing strips 5. The inner wall of the multiple fixing strips 5 is provided with an oxygen barrier layer 6. The multiple conductors 7 are all located inside the oxygen barrier layer 6. A guide strip 8 is provided between the multiple conductors 7. The guide strip 8 is made of organic silicone and has good flexibility and elasticity.

[0019] A through hole 501 is provided on the outer side wall of the fixing strip 5.

[0020] In this embodiment: the combination of fire-resistant layer 3, oxygen barrier layer 6, and low-smoke halogen-free jacket 2 can isolate oxygen and heat, and enable the cable body 1 to withstand high temperatures and not easily melt, so as to ensure the durability of the fireproof effect, isolate the fire source, prevent the spread of fire, and improve the flame retardant effect. By rolling an anti-aging layer with an ultraviolet absorber on the outer wall of the low-smoke halogen-free jacket 2, the cable body 1 is prevented from aging due to prolonged exposure to sunlight. The oxygen-free copper dense braided mesh layer 4 increases the density of the mesh layer and the strength of the cable body 1. The multiple through holes 501 opened on the fixing strip 5 can increase the flexibility of the fixing strip 5. At the same time, the cooperation of the guide strip 8 improves the tensile and compressive strength of the cable body 1 and extends its service life.

[0021] As a technical optimization of this utility model, the fire-resistant layer 3 adopts fireproof wrapping tape.

[0022] In this embodiment, the fire-resistant layer 3 is made of fireproof tape, which can withstand high temperatures and is not easily melted, so as to ensure the durability of the fireproof effect, isolate the fire source, and prevent the fire from spreading.

[0023] As a technical optimization of this utility model, the oxygen barrier layer 6 is made of ceramicized silicone rubber.

[0024] In this embodiment, the oxygen barrier layer 6 is made of ceramicized silicone rubber, which can form a hard ceramic layer at high temperatures, isolating oxygen and heat, thereby preventing the cable from burning further.

[0025] As a technical optimization of this utility model, a heat insulation layer 701 is provided on the outer wall of the core 7, and an insulating pad 702 is provided on the outer wall of the heat insulation layer 701 to abut against the outer wall of the guide strip 8.

[0026] In this embodiment, the insulating pad 702 is provided to insulate the wire core 7.

[0027] As a technical optimization of this utility model, the heat insulation layer 701 adopts a multi-layer mica tape.

[0028] In this embodiment, by setting the heat insulation layer 701 to use multi-layer mica tape, the structure can remain stable at high temperatures, without burning or melting, and it can play a role in heat insulation for the wire core 7.

[0029] As a technical optimization of this utility model, the outer wall of the low-smoke halogen-free jacket 2 is coated with an anti-aging layer.

[0030] In this embodiment, the anti-aging layer is made of ultraviolet absorber, which can absorb or disperse ultraviolet rays, reduce the impact of photoaging on cable materials, and prevent the cable body 1 from aging due to prolonged exposure to sunlight.

[0031] Working principle: First, this utility model, through the combination of the fire-resistant layer 3, the oxygen-barrier layer 6, and the low-smoke halogen-free jacket 2, can isolate oxygen and heat, and enable the cable body 1 to withstand high temperatures and not easily melt, thus ensuring the durability of the fireproof effect, isolating the fire source, preventing the spread of fire, and improving the flame-retardant effect. The low-smoke halogen-free jacket 2 produces very little smoke, reducing the smoke concentration in a fire. By rolling an anti-aging layer with an ultraviolet absorber on the outer wall of the low-smoke halogen-free jacket 2, the cable body 1 is prevented from aging due to prolonged exposure to sunlight. The oxygen-free copper dense braided mesh layer 4 increases the density of the mesh layer and the strength of the cable body 1. Multiple through holes 501 are opened on the fixing strip 5 to improve the flexibility of the fixing strip 5. At the same time, the cooperation of the guide strip 8 improves the tensile and compressive strength of the cable body 1 and extends its service life.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A halogen-free flame-retardant cable comprising a cable body (1) and a plurality of cores (7), the cable body (1) comprising a low-smoke halogen-free sheath (2), characterized in that: The inner side wall of the low-smoke halogen-free sheath (2) is provided with a fire-resistant layer (3), the inner side wall of the fire-resistant layer (3) is provided with an oxygen-free copper dense mesh layer (4), the inner side wall of the oxygen-free copper dense mesh layer (4) is provided with a plurality of fixed strips (5), the inner side wall of the plurality of fixed strips (5) is provided with an oxygen barrier layer (6), a plurality of wire cores (7) are located inside the oxygen barrier layer (6), and a guide strip (8) is arranged between the plurality of wire cores (7). A through hole (501) is formed in the outer side wall of the fixed strip (5).

2. A halogen-free flame-retardant cable according to claim 1, characterized in that: The fire-resistant layer (3) adopts a fireproof tape.

3. A halogen-free flame-retardant cable according to claim 1, characterized in that: The material of the oxygen barrier layer (6) is ceramicized silicone rubber.

4. A halogen-free flame-retardant cable according to claim 1, characterized in that: The outer side wall of the wire core (7) is provided with a heat insulation layer (701), and the outer side wall of the heat insulation layer (701) is provided with an insulating pad (702) abutting against the outer side wall of the guide strip (8).

5. A halogen-free flame-retardant cable according to claim 4, characterized in that: The heat insulation layer (701) adopts a multilayer mica tape.

6. A halogen-free flame-retardant cable according to claim 1, characterized in that: The outer side wall of the low-smoke halogen-free sheath (2) is coated with an anti-aging layer.

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