Multi-composite flame-retardant cable

Abstract

The utility model discloses a multiple composite flame-retardant cable, which comprises a cable body, the cable body comprises a sheath layer, a filler and a plurality of leads, the leads are all arranged in the filler, the sheath layer is arranged on the outer side of the filler, the sheath layer comprises a flame-retardant layer, the flame-retardant layer comprises a polyvinyl chloride layer and a fluororubber layer, and the fluororubber layer is arranged on the outer side of the filler. The fluororubber layer is arranged on the outer side of the polyvinyl chloride layer, and the sheath layer further comprises a heat insulation layer which is arranged in the flame-retardant layer. According to the utility model, cable spontaneous combustion caused by high temperature can be effectively avoided, composite flame retardation of the cable is realized through cooperation of the fluororubber layer and the polyvinyl chloride layer, the cable is prevented from burning, the flame retardation effect of the cable is improved, external heat can be isolated, the influence of high temperature on use of the cable is avoided, and the service life of the cable is prolonged. The use effect of the cable is improved, water can be prevented from entering the surface of the wire, and the waterproof performance of the cable is improved.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a multi-composite flame-retardant cable. Background Technology

[0002] Cables are typically made up of several or groups of conductors (at least two conductors per group) twisted together, similar to a rope. Each group of conductors is insulated from the others and is often twisted around a central core to carry current.

[0003] As disclosed in the patent CN208352005U, a flame-retardant cable, there is a problem in the prior art where flames spread along the cable during a fire, causing extensive damage. In order to solve this problem, this application proposes a cable with a new structure. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-composite flame-retardant cable.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-composite flame-retardant cable includes a cable body, which includes a sheath layer, a filler, and multiple conductors. The multiple conductors are disposed within the filler, and the sheath layer is disposed outside the filler. The sheath layer includes a flame-retardant layer, which includes a polyvinyl chloride layer and a fluororubber layer. The fluororubber layer is disposed outside the polyvinyl chloride layer.

[0007] As a further embodiment of this utility model, the sheath layer further includes a heat insulation layer, which is disposed within the flame retardant layer. The heat insulation layer includes an asbestos layer and an aerogel layer, with the aerogel layer located outside the asbestos layer.

[0008] As a further embodiment of this utility model, a tensile layer is wrapped around the outside of the heat insulation layer, and the tensile layer is located between the heat insulation layer and the flame retardant layer.

[0009] As a further improvement of this invention, an insulating layer is extruded onto the outer side of the plurality of said conductors.

[0010] As a further improvement of this invention, a waterproof layer is extruded onto the outer side of the insulating layer.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. By setting the flame-retardant layer, the fluororubber layer in the flame-retardant layer has the characteristics of high temperature resistance, while the polyvinyl chloride layer is a polymer formed by polymerization under the action of peroxide, azo compounds and other initiators, or under the action of light and heat according to the free radical polymerization mechanism. It can effectively avoid the spontaneous combustion of the cable caused by high temperature. Thus, the combination of the fluororubber layer and the polyvinyl chloride layer achieves the composite flame retardancy of the cable, prevents the cable from burning, and improves the flame retardant effect of the cable.

[0013] 2. Through the setting of the insulation layer, the asbestos layer in the insulation layer has high fire resistance and heat insulation, and the aerogel layer also has good heat insulation. Therefore, it can isolate external heat, thereby avoiding the impact of high temperature on the use of the cable and improving the performance of the cable.

[0014] 3. The waterproof layer is installed on the outside of the conductor and is made of polyethylene polypropylene. Polyethylene polypropylene has strong impermeability, so it can prevent water from entering the surface of the conductor and improve the waterproof performance of the cable. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a multi-composite flame-retardant cable proposed in this utility model;

[0016] Figure 2 This is a partial cross-sectional view of a multi-composite flame-retardant cable proposed in this utility model.

[0017] Figure 3 This is a schematic diagram of the flame-retardant layer structure of a multi-composite flame-retardant cable proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the heat insulation layer structure of a multi-composite flame-retardant cable proposed in this utility model.

[0019] In the diagram: 1. Flame retardant layer; 2. Tensile layer; 3. Heat insulation layer; 4. Filler; 5. Waterproof layer; 6. Insulation layer; 7. Wire; 8. Fluororubber layer; 9. Polyvinyl chloride layer; 10. Asbestos layer; 11. Aerogel layer. Detailed Implementation

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Therefore, all other embodiments of this application described herein, and all embodiments obtained by those skilled in the art without creative effort based on the embodiments in this application, should fall within the scope of protection of this application.

[0021] Reference Figures 1-4A multi-layer composite flame-retardant cable includes a cable body, which comprises a sheath layer, a filler 4, and multiple conductors 7, all of which are copper wires and are disposed within the filler 4. The sheath layer is disposed outside the filler 4, and the filler 4 is made of aerogel. The sheath layer includes a flame-retardant layer 1, which comprises a polyvinyl chloride (PVC) layer 9 and a fluororubber layer 8. The fluororubber layer 8 is disposed outside the PVC layer 9. The fluororubber layer 8 in the flame-retardant layer 1 has high-temperature resistance, while the PVC layer 9 is a polymer formed by polymerization of peroxides, azo compounds, or other initiators, or by free radical polymerization under the action of light and heat. This effectively prevents spontaneous combustion of the cable caused by high temperatures. Thus, the combination of the fluororubber layer 8 and the PVC layer 9 achieves composite flame retardancy of the cable, preventing the cable from burning and improving the flame-retardant effect of the cable.

[0022] In this invention, the sheath layer also includes a heat insulation layer 3, which is disposed inside the flame retardant layer 1. The heat insulation layer 3 includes an asbestos layer 10 and an aerogel layer 11. The aerogel layer 11 is located outside the asbestos layer 10. The asbestos layer 10 in the heat insulation layer 3 has high fire resistance and heat insulation properties, and the aerogel layer 11 also has good heat insulation properties. Therefore, it can isolate external heat, thereby avoiding the impact of high temperature on the use of the cable and improving the performance of the cable. A tensile layer 2 is wrapped around the outside of the heat insulation layer 3. The tensile layer 2 is made of tensile rope. The tensile layer 2 can improve the tensile strength of the cable. The tensile layer 2 is located between the heat insulation layer 3 and the flame retardant layer 1. An insulation layer 6 is extruded around the outside of multiple conductors 7. The insulation layer 6 is made of rubber. A waterproof layer 5 is extruded around the outside of the insulation layer 6. The waterproof layer 5 is made of polyethylene polypropylene. Polyethylene polypropylene has strong impermeability, so it can prevent moisture from entering the surface of the conductors 7 and improve the waterproof performance of the cable.

[0023] Working principle: An insulation layer 6 is formed on the outside of multiple conductors 7 using rubber as the raw material through an extrusion process. A waterproof layer 5 is formed on the outside of the insulation layer 6 using polyethylene polypropylene as the raw material through a wrapping process. Then, the multiple conductors 7 are joined together. Next, a filler 4 is formed on the outside of the multiple conductors 7 using aerogel as the raw material through an extrusion process. Asbestos is wrapped around the filler 4 to form an asbestos layer 10. Finally, an aerogel layer 11 is formed on the outside of the asbestos layer 10 using aerogel as the raw material through an extrusion process. Thus, the combination of the asbestos layer 10 and the aerogel layer 11 forms... The heat insulation layer 3 is formed by wrapping a tensile layer 2 on the outside of the heat insulation layer 3 using tensile rope as raw material. A polyvinyl chloride (PVC) layer 9 is formed on the outside of the tensile layer 2 using polyvinyl chloride (PVC) as raw material through an extrusion process. A fluororubber layer 8 is formed on the outside of the PVC layer 9 using fluororubber as raw material through an extrusion process. Thus, the flame retardant layer 1 is formed by the combination of the fluororubber layer 8 and the PVC layer 9. When the cable is made, it can effectively prevent the cable from spontaneously combusting due to high temperature. The combination of the fluororubber layer 8 and the PVC layer 9 achieves composite flame retardancy of the cable, prevents the cable from burning, and improves the flame retardant effect of the cable.

[0024] This utility model has been described through the above embodiments. Those skilled in the art will understand that this utility model is not limited to the above embodiments. Many more modifications can be made based on the teachings of this utility model, and all such modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-layer composite flame-retardant cable, comprising a cable body, the cable body including a sheath layer, filler (4) and multiple conductors (7), characterized in that, Multiple conductors (7) are disposed inside the filler (4), and a sheath layer is disposed outside the filler (4). The sheath layer includes a flame retardant layer (1), which includes a polyvinyl chloride layer (9) and a fluororubber layer (8). The fluororubber layer (8) is disposed outside the polyvinyl chloride layer (9).

2. The multi-composite flame-retardant cable according to claim 1, characterized in that, The sheath layer also includes a heat insulation layer (3), which is disposed inside the flame retardant layer (1). The heat insulation layer (3) includes an asbestos layer (10) and an aerogel layer (11), with the aerogel layer (11) located outside the asbestos layer (10).

3. The multi-composite flame-retardant cable according to claim 2, characterized in that, The outer side of the heat insulation layer (3) is wrapped with a tensile layer (2), which is located between the heat insulation layer (3) and the flame retardant layer (1).

4. The multi-composite flame-retardant cable according to claim 1, characterized in that, The outer sides of the plurality of said conductors (7) are covered with an insulating layer (6).

5. A multi-composite flame-retardant cable according to claim 4, characterized in that, A waterproof layer (5) is extruded onto the outside of the insulating layer (6).

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