Composite flame-retardant cable

Abstract

The utility model relates to the technical field of cables, in particular to a composite flame-retardant cable. A composite flame-retardant cable comprises at least three cable cores; the isolation unit comprises an isolation piece, the isolation piece is provided with at least three arc-shaped sections which are mutually connected, the adjacent arc-shaped sections are overlapped, and the arc-shaped sections are used for accommodating cable cores; and the protection unit coats the periphery of the isolation unit and comprises a composite layer, a heat conduction layer and a wear-resistant layer which are sequentially arranged from inside to outside. The composite flame-retardant cable provided by the utility model solves the problems that a plurality of cable cores in the cable are mutually abraded and the service life is shortened due to repeated bending and severe use environment of the cable in long-term use, thereby providing the composite flame-retardant cable.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, and particularly relates to a composite flame-retardant cable. Background Art

[0002] Cables are applied in all walks of life. For example, in the power system: the wire and cable products used in the power system mainly include overhead bare wires, busbars, power cables (plastic cables, oil-paper power cables (basically replaced by plastic power cables), rubber-sheathed cables, overhead insulated cables), branch cables (replacing part of the busbars), magnet wires, and electrical equipment wires and cables for power equipment, etc.; for information transmission: the wire and cable products used for information transmission systems mainly include local telephone cables, television cables, electronic cables, radio frequency cables, fiber optic cables, data cables, magnet wires, power communication or other composite cables, etc.; for the instrument system: almost all products except overhead bare wires are used in this part, but mainly power cables, magnet wires, data cables, instrument and meter cables, etc. In some mechanical industries, especially in construction machinery, cables are essential tools for transmitting power.

[0003] At present, during the use of cables, due to repeated bending of the cables and the fact that some use environments are relatively harsh, the multiple cable cores inside wear against each other, thereby reducing the service life of the cables. Content of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the cables in the prior art are repeatedly bent during long-term use and the use environment is harsh, resulting in mutual wear of multiple cable cores inside the cables and reducing the service life, so as to provide a composite flame-retardant cable.

[0005] To solve the above problems, the utility model provides a composite flame-retardant cable, including:

[0006] At least three cable cores;

[0007] An isolation unit, the isolation unit includes an isolation member, the isolation member is provided with at least three interconnected arc segments, adjacent arc segments are arranged in an overlapping manner, and the arc segments are used to accommodate the cable cores;

[0008] A protection unit, covering the outer periphery of the isolation unit, including a composite layer, a heat-conducting layer and a wear-resistant layer arranged in sequence from the inside to the outside.

[0009] Optionally, the arc segments and the cable cores are arranged in a one-to-one correspondence.

[0010] Optionally, a filling layer is provided in the gap between the isolation member and the composite layer, and a filling layer is provided in the gap between the arc segments and the isolation member.

[0011] Optionally, the isolation unit further includes a reinforcing rib. An accommodation space is formed between adjacent arc segments of the isolator, and the reinforcing rib is disposed in the accommodation space.

[0012] Optionally, a tensile layer is provided between the reinforcing rib and the arc segment.

[0013] Optionally, a waterproof layer is provided between the composite layer and the heat-conducting layer.

[0014] Optionally, an insulating layer is provided between the heat-conducting layer and the wear-resistant layer.

[0015] Optionally, a flame-retardant layer is provided between the insulating layer and the heat-conducting layer.

[0016] The technical solution of the present utility model has the following advantages:

[0017] 1. The composite flame-retardant cable provided by the present utility model includes at least three cable cores; an isolation unit, the isolation unit includes an isolator, the isolator is provided with at least three interconnected arc segments, and adjacent arc segments overlap each other, and the arc segments are used to accommodate the cable cores; a protection unit, covering the outer periphery of the isolation unit, including a composite layer, a heat-conducting layer and a wear-resistant layer arranged in sequence from inside to outside. Through the arrangement of the arc segments, on the one hand, it can prevent signal interference, and on the other hand, it can reduce the friction and wear between the cable cores and extend the service life of the entire cable.

[0018] 2. For the composite flame-retardant cable provided by the present utility model, the arc segments and the cable cores are arranged in one-to-one correspondence, and the cable cores are wrapped by the arc segments to play a role in isolating the cable cores.

[0019] 3. For the composite flame-retardant cable provided by the present utility model, a filling layer is provided in the gap between the isolator and the composite layer, and a filling layer is provided in the gap between the arc segment and the isolator. The filling layer provides additional support and protection and improves the stability of the cable cores.

[0020] 4. For the composite flame-retardant cable provided by the present utility model, the isolation unit further includes a reinforcing rib. An accommodation space is formed between adjacent arc segments of the isolator, and the reinforcing rib is disposed in the accommodation space, which can enhance the mechanical strength and tensile performance of the cable and improve the durability and safety of the cable.

[0021] 5. For the composite flame-retardant cable provided by the present utility model, a tensile layer is provided between the reinforcing rib and the arc segment to protect the reinforcing rib and the arc segment.

[0022] 6. For the composite flame-retardant cable provided by the present utility model, a waterproof layer is provided between the composite layer and the heat-conducting layer, and the waterproof layer plays a role in waterproofing.

[0023] 7. For the composite flame-retardant cable provided by the present utility model, an insulating layer is provided between the heat-conducting layer and the wear-resistant layer, and the insulating layer plays a role in insulation.

[0024] 8. The composite flame-retardant cable provided by the present utility model is provided with a flame-retardant layer between the insulating layer and the heat-conducting layer, and the flame-retardant layer plays a role in preventing the fire from spreading. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of the composite flame-retardant cable provided in the embodiments of the present utility model;

[0027] Figure 2 It is a front view of the composite flame-retardant cable provided in the embodiments of the present utility model;

[0028] Figure 3 is Figure 2 an enlarged schematic diagram of A shown in.

[0029] Description of the reference numerals in the drawings: 1. Cable core; 2. Protection unit; 201. Wear-resistant layer; 202. Insulating layer; 203. Flame-retardant layer; 204. Heat-conducting layer; 205. Waterproof layer; 206. Composite layer; 207. Filling layer; 3. Isolation unit; 301. Isolation member; 302. Tensile layer; 303. Reinforcing rib. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will clearly and completely describe the technical solutions of the present utility model in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model fall within the scope of protection of the present utility model.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] As Figure 1 shown in Fig. -3, a specific embodiment of the composite flame-retardant cable includes: a protection unit 2, and a cable core 1 and an isolation unit 3 disposed within the protection unit 2.

[0035] As Figure 1 、 Figure 2 and Figure 3 shown, the number of cable cores 1 is 4.

[0036] As Figure 1 、 Figure 2 、 Figure 3 shown, the isolation unit 3 includes an isolation member 301. The isolation member 301 is provided with four arc segments, and the arc segments are arranged in one-to-one correspondence with the cable cores 1. The adjacent arc segments overlap with each other. A receiving space is formed within the four arc segments, and a reinforcing rib 303 is disposed within the receiving space. As Figure 1 、 Figure 2 and Figure 3 shown, a tensile layer 302 is provided between the reinforcing rib 303 and the arc segment. The tensile layer 302 is made of polyvinylamine, which has a certain wear-resistant effect and strengthens the protection of the reinforcing rib 303 and the arc segment.

[0037] As Figure 1 、 Figure 2 and Figure 3 shown, the protection unit 2 is sequentially provided with a composite layer 206, a waterproof layer 205, a heat-conducting layer 204, a flame-retardant layer 203, an insulating layer 202, and a wear-resistant layer 201 from the inside to the outside. As Figure 2 、 Figure 3As shown in the figure, a filling layer 207 is provided in the gap between the spacer 301 and the composite layer 206, and a filling layer 207 is provided in the gap between the arc section and the spacer 301. The filling layer 207 is made of polyester tape. The polyester tape has good mechanical properties and wear resistance, and can provide additional support and protection to improve the stability of the connection between the cable core 1 and the filling layer 207. The composite layer 206 is made of polydimethylsiloxane, calcium sulfate and coupling agent vinyltriethoxysilane. Polydimethylsiloxane has excellent heat resistance, cold resistance, weather resistance and electrical insulation properties, making the cable have good electrical insulation performance. Calcium sulfate, as a filler, can improve the hardness and strength of the composite material. The presence of the coupling agent vinyltriethoxysilane can improve the compatibility between polydimethylsiloxane and calcium sulfate, enhance the overall performance of the composite material, and has good flame retardant properties, which can effectively prevent the spread of fire, thereby improving the safety of the cable. As Figure 2 , Figure 3 shown in the figure, the waterproof layer 205 is made of chloroprene rubber, which can effectively prevent moisture from penetrating into the cable core 1, thereby improving the overall waterproof performance and extending the service life of the cable. The heat conduction layer 204 is made of heat conduction graphite sheet, which has good heat conduction performance and can help the heat generated inside the cable to dissipate quickly to prevent the cable from being damaged due to overheating. The flame retardant layer 203 is composed of low-smoke and low-halogen flame retardant materials, which has good flame retardant performance and can reduce the generation of toxic smoke while preventing the spread of fire, improving safety. The insulating layer 202 is composed of cross-linked polyethylene and polypropylene. It has excellent electrical properties, high insulation resistance and breakdown voltage, small dielectric loss, melting point and excellent electrical insulation properties. At the same time, cross-linked polyethylene can ensure the transmission of current signals and withstand high-voltage transmission, improving the use effect of the cable. The wear-resistant layer 201 is made of a combination of chlorinated polyethylene, silicone rubber and flake graphite powder, so as to provide good wear resistance.

[0038] The composite flame retardant cable provided by the present invention has the following advantages: (1) By providing an arc section on the spacer 301, signal interference is effectively prevented, the cable transmission quality is improved, the friction and wear between the cable cores 1 are reduced, and the service life of the cable is extended; (2) Through the design of the arc section, the partition area for the cable core 1 is increased, and the use effect of the cable is improved; (3) By the combined use of the wear-resistant layer 201, the insulating layer 202, the flame retardant layer 203, the heat conduction layer 204, the waterproof layer 205, the composite layer 206 and the filling layer 207, good wear resistance can be provided, the transmission of current signals can be ensured and high-voltage transmission can be withstood, and the abrasion and scratches on the cable surface can be effectively reduced, the service life of the cable is extended, the safety of personnel and equipment is guaranteed, the performance degradation or failure of the cable caused by environmental influence can be effectively prevented, and at the same time, it has good flame retardant performance, which can reduce the generation of toxic smoke while preventing the spread of fire, improving safety.

[0039] As an alternative embodiment, the number of cable cores 1 can also be 3, 5, 6 or even more.

[0040] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the embodiments. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the embodiments here. And the obvious changes or variations derived therefrom are still within the protection scope of the present utility model.

Claims

1. A composite flame-retardant cable, characterized in that, Comprising: At least three cable cores (1); An isolation unit (3), the isolation unit (3) includes an isolator (301), the isolator (301) is provided with at least three interconnected arc segments, adjacent arc segments are arranged to overlap each other, and the arc segments are for accommodating the cable cores (1); A protection unit (2), covering the outer periphery of the isolation unit (3), including a composite layer (206), a heat-conducting layer (204) and a wear-resistant layer (201) arranged in sequence from the inside to the outside.

2. The composite flame-retardant cable according to claim 1, wherein The arc segments and the cable cores (1) are arranged in one-to-one correspondence.

3. The composite flame-retardant cable according to claim 2, wherein, A filling layer (207) is provided in the gap between the isolator (301) and the composite layer (206), and a filling layer (207) is provided in the gap between the arc segments and the isolator (301).

4. The composite flame-retardant cable according to claim 3, characterized in that, The isolation unit (3) further includes a reinforcing rib (303), and an accommodation space is formed between adjacent arc segments of the isolator (301), and the reinforcing rib (303) is provided in the accommodation space.

5. The composite flame-retardant cable according to claim 4, characterized in that, A tensile layer (302) is provided between the reinforcing rib (303) and the arc segments.

6. The composite flame-retardant cable according to claim 1, characterized in that A waterproof layer (205) is provided between the composite layer (206) and the heat-conducting layer (204).

7. The composite flame-retardant cable according to claim 6, wherein, An insulating layer (202) is provided between the heat-conducting layer (204) and the wear-resistant layer (201).

8. The composite flame-retardant cable according to claim 7, characterized in that, A flame-retardant layer (203) is provided between the insulating layer (202) and the heat-conducting layer (204).

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