Composite cable

Abstract

This utility model relates to the field of cable technology, and in particular to a composite cable. The buffer layer is fixedly connected to the inner sheath layer and the braided layer on both sides, respectively, and the outer wall of the second reinforcing strip is fixedly connected to the braided layer. This composite cable, through the cooperation of polypropylene mesh filler, braided layer, and protective structure, uses a first reinforcing strip spirally wound within the polypropylene mesh filler to directly enhance axial tensile strength and prevent excessive constraint on cable bending. The second reinforcing strip, mixed into the braided layer, works synergistically with the original braided layer to enhance overall impact resistance. The buffer layer directly buffers external impacts on the cable body, protecting the internal insulation layer; it also improves flexibility during bending. The strength can be increased through the first and second reinforcing strips, reducing the possibility of breakage due to stress concentration. When the cable is impacted, the buffer layer acts as a buffer, reducing conductor deformation or breakage.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a composite cable. Background Technology

[0002] Composite cables (also known as composite cables) are a type of cable that integrates multiple functions into one. By combining different cores for power transmission, communication signals, and data transmission within the same sheath, they achieve synchronous transmission of multiple signals and spatial optimization.

[0003] For example, a composite cable with announcement number "CN204808915U" possesses high strength and flexibility. It uses stranded soft round copper wire conductors and braided high-strength composite flexible fiber material, enhancing its tensile strength, impact resistance, and damage resistance without the need for any metal sheath, making it suitable for applications involving frequent movement and dragging. Its improved bending performance design results in a smaller bending radius than comparable ordinary cables. Installation and splicing of this product are identical to those of ordinary power cables, requiring no special accessories or tools. However, while the cable uses fiberglass rope filler to enhance tensile strength, fiberglass is brittle and lacks flexibility. Under axial tension, it is prone to breakage due to stress concentration. Furthermore, when the cable is impacted, the external impact force is directly transmitted to the inner sheath and internal insulation layer, leading to conductor deformation or breakage. Utility Model Content

[0004] The purpose of this invention is to solve the problem that while glass fiber rope filler enhances tensile strength, glass fiber is brittle and has poor flexibility, making it prone to breakage due to stress concentration when subjected to axial tension. In addition, when the cable is impacted, the external impact force is directly transmitted to the inner sheath and internal insulation layer, resulting in conductor deformation or breakage. Therefore, a composite cable is proposed.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] Design a composite cable including a conductor and a polyester tape. The conductor is fixedly connected inside the polyester tape. A protective structure is provided on the outside of the conductor. The protective structure includes a first reinforcing strip, a second reinforcing strip, and a buffer layer. The outer wall of the first reinforcing strip is fixedly connected to a polypropylene mesh filler. The two sides of the buffer layer are fixedly connected to an inner sheath layer and a braided layer, respectively. The outer wall of the second reinforcing strip is fixedly connected to the braided layer.

[0007] Preferably, the polypropylene mesh filler is filled between the inner sheath layer and the glass fiber rope filler.

[0008] Preferably, the glass fiber rope filler is filled between the polypropylene mesh filler and the halogen-free, low-smoke, flame-retardant ethylene propylene rubber insulation layer.

[0009] Preferably, the inner wall of the halogen-free, low-smoke, flame-retardant ethylene propylene rubber insulation layer is fixedly connected to the polyester tape.

[0010] Preferably, the outer wall of the woven layer is fixedly connected to an outer sheath layer.

[0011] The composite cable proposed in this utility model has the following advantages: Through the combination of polypropylene mesh filler, braided layer, and protective structure, a first reinforcing strip is spirally wound within the polypropylene mesh filler, directly enhancing axial tensile strength and preventing excessive constraint on cable bending. A second reinforcing strip is incorporated into the braided layer, working synergistically with the original braided layer to enhance overall impact resistance. A buffer layer directly buffers external impacts on the cable body, protecting the internal insulation layer. It also improves flexibility during bending, allowing the first and second reinforcing strips to enhance strength and reduce breakage due to stress concentration. When the cable is impacted, the buffer layer acts as a buffer, reducing conductor deformation or breakage. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 for Figure 1 A partial front sectional view;

[0014] Figure 3 for Figure 1 Right sectional view;

[0015] Figure 4 for Figure 3 A partial frontal sectional view.

[0016] In the diagram: 1. Conductor, 2. Polyester tape, 3. Halogen-free low-smoke flame-retardant ethylene propylene rubber insulation layer, 4. Fiberglass rope filler, 5. Outer sheath layer, 6. Polypropylene mesh filler, 7. Protective structure, 701. First reinforcing strip, 702. Buffer layer, 703. Second reinforcing strip, 8. Inner sheath layer, 9. Braided layer. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] See attached document Figure 1-4In this embodiment, a composite cable includes a conductor 1 and a polyester tape 2. The conductor 1 is fixedly connected inside the polyester tape 2. A protective structure 7 is provided on the outside of the conductor 1. The protective structure 7 includes a first reinforcing strip 701, a second reinforcing strip 703, and a buffer layer 702. The first reinforcing strip 701 and the second reinforcing strip 703 are both made of fine steel wire. The outer wall of the first reinforcing strip 701 is fixedly connected to a polypropylene mesh filler 6. The buffer layer 702 is fixedly connected to an inner sheath layer 8 and a braided layer 9 on both sides, respectively. The buffer layer 702 is made of foamed silicone rubber. The inner sheath layer 8 is made of high flame retardant halogen-free low smoke sheath material. The outer wall of the second reinforcing strip 703 is fixedly connected to the braided layer 9. The braided layer 9 is made of high-strength composite flexible fiber material.

[0019] Polypropylene mesh filler 6 is filled between the inner sheath layer 8 and the fiberglass rope filler 4. Fiberglass rope filler 4 is filled between the polypropylene mesh filler 6 and the halogen-free, low-smoke, flame-retardant ethylene propylene rubber insulation layer 3. The inner wall of the halogen-free, low-smoke, flame-retardant ethylene propylene rubber insulation layer 3 is fixedly connected to the polyester tape 2. The outer wall of the braided layer 9 is fixedly connected to the outer sheath layer 5. The outer sheath layer 5 is made of high flame-retardant, acid and alkali resistant polyvinyl chloride rubber elastomer plastic.

[0020] Working principle:

[0021] When using this composite cable:

[0022] Conductor 1 is made of oxygen-free pure copper compacted conductor or single solid conductor, providing a low-resistance conductive path to carry large current transmission. Polyester tape 2 wraps around the outside of conductor 1 to prevent direct friction between the conductor and the insulation layer, avoiding damage to the insulation layer. Halogen-free, low-smoke, flame-retardant ethylene propylene rubber insulation layer 3 can provide high insulation strength (breakdown voltage ≥15kV), ensuring the safety of insulation between conductors 1 and to ground. Fiberglass rope filler 4, the high strength characteristics of fiberglass (tensile strength ≥1000MPa) can improve the axial tensile performance of the cable. Polypropylene mesh filler 6 fills the gap between the inner sheath and the internal structure, ensuring the overall roundness of the cable and avoiding local stress concentration. Inner sheath layer 8 fixes the internal conductor 1, insulation layer, filler, etc. into a whole, facilitating subsequent processing. Braided layer 9, fiber braided structure resists external friction (such as ground abrasion during dragging), protecting the internal structure. Outer sheath layer 5 is made of high flame-retardant, acid and alkali resistant polyvinyl chloride rubber and plastic material, resisting chemical corrosion such as acids, alkalis, and salts, and is suitable for harsh environments such as industrial pollution areas and outdoors.

[0023] The first reinforcing strip 701 is spirally wound inside the polypropylene mesh filler 6, which directly enhances the axial tensile strength and avoids excessive binding of the cable bending. The second reinforcing strip 703 is mixed into the braided layer 9 and works synergistically with the original braided layer to enhance the overall impact resistance. When the cable is subjected to axial tensile force, the first reinforcing strip 701 and the second reinforcing strip 702 can increase the strength and reduce the possibility of breakage due to stress concentration. At the same time, the buffer layer 702 directly buffers the external impact on the cable body and protects the internal insulation layer; it also improves the flexibility when bending. Therefore, when the cable is impacted, the buffer layer 702 can play a buffering role and reduce the deformation or breakage of the conductor 1.

[0024] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A composite cable comprising a conductor (1) and a polyester tape (2), wherein the conductor (1) is internally connected to the polyester tape (2), characterized in that: The conductor (1) is provided with a protective structure (7) on the outside. The protective structure (7) includes a first reinforcing strip (701), a second reinforcing strip (703) and a buffer layer (702). The outer wall of the first reinforcing strip (701) is fixedly connected to the polypropylene mesh filler (6). The two sides of the buffer layer (702) are fixedly connected to the inner sheath layer (8) and the braided layer (9) respectively. The outer wall of the second reinforcing strip (703) is fixedly connected to the braided layer (9).

2. The composite cable according to claim 1, characterized in that: The polypropylene mesh filler (6) is filled between the inner sheath layer (8) and the glass fiber rope filler (4).

3. The composite cable according to claim 2, characterized in that: The glass fiber rope filler (4) is filled between the polypropylene mesh filler (6) and the halogen-free, low-smoke, flame-retardant ethylene propylene rubber insulation layer (3).

4. The composite cable according to claim 3, characterized in that: The inner wall of the halogen-free, low-smoke, flame-retardant ethylene propylene rubber insulation layer (3) is fixedly connected to the polyester tape (2).

5. The composite cable according to claim 1, characterized in that: The outer wall of the braided layer (9) is fixedly connected to the outer sheath layer (5).

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