Multi-core cable structure with wear-resistant protective sleeve

Abstract

The utility model discloses a kind of multi-core cable structures with wear-resistant protective sleeve, including skin component and multi-core component, skin component is coated outside multi-core component, and multi-core component includes framework and four groups of multi-core parts, framework is made of flexible fiber framework and four embedded strips, four embedded slots of rectangular array distribution are arranged in the side wall of flexible fiber framework, four embedded strips are respectively with embedded slot interference fit, and each group of multi-core part includes metal core body and the insulating layer coated outside, and multi-core part is fixed in embedded slot by the elastic pressure of embedded strip;The interference fit structure of flexible fiber framework and embedded strip, metal core body, insulating layer are locked in embedded slot by elastic pressure and form the core structure, form mechanical interlocking effect, compared with the rubber support frame of traditional technology, the design makes cable greatly improve compression strength under high pressure environment, can improve the service life of multi-core cable.

Description

Technical Field

[0001] This utility model relates to the field of multi-core cable technology, specifically to a multi-core cable structure with a wear-resistant protective sleeve. Background Technology

[0002] Multi-core cables typically consist of multiple core components to ensure electrical performance and mechanical protection. Their basic structure includes conductors (conductive cores), insulation, and a sheath. The conductors, made of conductive materials such as copper or aluminum, are the core of the multi-core cable and are responsible for transmitting current or signals. The insulation covers the conductors, providing electrical isolation and preventing current leakage. The sheath is the outermost layer, protecting the cable from mechanical damage and environmental factors (such as chemical corrosion or physical forces), enhancing overall durability. In practical applications, multi-core cable structures may also include additional components, such as connectors or branch structures, to improve connectivity and tensile strength—cable assembly connectors (such as external threaded couplings and insulating rubber gaskets) are used for branch combinations, while internal threaded couplings ensure a secure connection and prevent loosening due to pulling.

[0003] A novel multi-core cable, such as one with application number CN201822064382.0 and authorization announcement date of 20190813, includes a sheath frame, inner core wires, and a protective layer. The sheath frame includes a limiting tube, which is a cylindrical hollow tube. The limiting tube is divided into four identical wire-receiving cavities by a cross-shaped support frame. Both the limiting tube and the support frame are made of flexible rubber material. Each wire-receiving cavity is a fan-shaped space, and the limiting tube portion corresponding to each cavity is broken at the middle position, forming an inlet notch. The inner core wires enter the wire-receiving cavities through these inlet notches. The inner core wires include a metal wire and an external insulation layer. The sheath frame is externally covered with a protective layer made of rubber material. This multi-core cable has a simple structure and a relatively small number of rubber layers, improving production efficiency while reducing material costs.

[0004] Traditional multi-core cable structures mostly use rubber support frames. Rubber support frames have poor pressure resistance under high pressure environments and are prone to deformation of the internal core due to external pressure. Therefore, there is an urgent need to design a multi-core cable structure with a wear-resistant protective sleeve to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a multi-core cable structure with a wear-resistant protective sleeve to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A multi-core cable structure with a wear-resistant protective sheath includes an outer sheath assembly and a multi-core assembly. The outer sheath assembly covers the outside of the multi-core assembly. The multi-core assembly includes a skeleton component and four sets of multi-core components. The skeleton component is composed of a flexible fiber skeleton and four insert strips. The sidewall of the flexible fiber skeleton is provided with four insert slots arranged in a rectangular array. The four insert strips are respectively interference-fitted with the insert slots. Each set of multi-core components includes a metal core and an insulating layer covering it. The multi-core components are fixed in the insert slots by the elastic pressure of the insert strips.

[0007] Furthermore, the outer skin assembly includes an insulating sleeve that wraps around the flexible fiber skeleton, and the inner wall of the insulating sleeve is in contact with four insert strips.

[0008] Furthermore, the insulating sheath is covered with an armored protective layer, which is a stainless steel wire braided layer, and the armored protective layer is covered with an elastic thick leather layer.

[0009] Furthermore, the outer surface of the elastic thick skin layer is designed with a honeycomb-shaped vesicle layer, and the honeycomb-shaped vesicle layer is wrapped with an external protective layer.

[0010] Furthermore, the outer protective layer includes an inner skin layer and a fabric layer. The inner skin layer has an elastic thick skin layer with a vesicle layer that is thermally bonded together, and the aramid fabric layer is bonded to the inner skin layer with epoxy resin.

[0011] Furthermore, there are equidistant cavities between the fabric layer and the inner skin layer, and the cavities are filled with flame-retardant and heat-insulating material.

[0012] In the above technical solution, the multi-core cable structure with wear-resistant protective sleeve provided by this utility model has the following advantages: (1) The interference fit structure of the flexible fiber skeleton and the embedded strip of this utility model locks the core structure composed of metal core and insulation layer in the embedded groove through elastic pressure, forming a mechanical interlocking effect. Compared with the rubber support frame of the traditional technology, this design greatly improves the compressive strength of the cable under high pressure environment and can improve the service life of multi-core cables.

[0013] (2) The continuous contact surface between the insulating sheath and the embedded strip of this utility model forms the first layer of electrical isolation barrier. The armored protective layer woven with stainless steel wire provides anti-cut protection, while the elastic thick skin layer absorbs impact energy. The three-layer structure works together to solve the problem of single-layer protection defects, and the wear resistance life is increased by a factor of two. Furthermore, the pore structure of the honeycomb vesicle layer produces non-uniform deformation when bent, which effectively disperses external stress and avoids the core compression caused by stress concentration in traditional rubber support frames.

[0014] (3) The aramid fabric layer and the flame-retardant heat insulation material of this utility model constitute a dual-level fire protection system. In addition, the flexible fiber skeleton and embedded strips, honeycomb vesicle layer and other structures can increase the service life of the cable in high wear and strong bending scenarios to many times that of traditional products. Furthermore, through material and structural innovation, the triple performance balance of pressure resistance, wear resistance and flame retardancy that the background technology has failed to achieve is realized. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of a multi-core cable with a wear-resistant protective sleeve according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of a multi-core component structure provided for an embodiment of a multi-core cable structure with a wear-resistant protective sleeve according to this utility model.

[0018] Figure 3 This is a schematic diagram of the skeleton structure provided for an embodiment of a multi-core cable structure with a wear-resistant protective sleeve according to this utility model.

[0019] Figure 4 This is a schematic diagram of the multi-core component structure provided for an embodiment of a multi-core cable structure with a wear-resistant protective sleeve according to this utility model.

[0020] Figure 5 This is a schematic diagram of the outer sheath assembly structure provided for an embodiment of a multi-core cable structure with a wear-resistant protective sleeve according to this utility model.

[0021] Figure 6 This is a schematic diagram of the external protective layer structure provided for an embodiment of a multi-core cable structure with a wear-resistant protective sleeve according to this utility model.

[0022] Explanation of reference numerals in the attached figures: 1. Outer skin assembly; 2. Multi-core assembly; 3. Skeleton component; 4. Multi-core component; 5. Flexible fiber skeleton; 6. Embedding groove; 7. Embedding strip; 8. Insulation layer; 9. Metal core; 10. Insulating sheath; 11. Armored protective layer; 12. Elastic thick skin layer; 13. Vesicle layer; 14. Outer protective layer; 15. Inner skin layer; 16. Fabric layer; 17. Cavity; 18. Flame-retardant and heat-insulating material. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-6 As shown in the figure, the present invention provides a multi-core cable structure with a wear-resistant protective sheath, including an outer sheath assembly 1 and a multi-core assembly 2. The outer sheath assembly 1 covers the outside of the multi-core assembly 2. The multi-core assembly 2 includes a skeleton 3 and four sets of multi-core components 4. The skeleton 3 is composed of a flexible fiber skeleton 5 and four insert strips 7. The side wall of the flexible fiber skeleton 5 is provided with four insert grooves 6 arranged in a rectangular array. The four insert strips 7 are respectively interference-fitted with the insert grooves 6. Each set of multi-core components 4 includes a metal core 9 and an insulating layer 8 covering it. The multi-core components 4 are fixed in the insert grooves 6 by the elastic pressure of the insert strips 7.

[0025] Specifically, in this embodiment, it includes an outer sheath assembly 1 and a multi-core assembly 2. The outer sheath assembly 1 covers the outside of the multi-core assembly 2. The multi-core assembly 2 includes a skeleton 3 and four sets of multi-core components 4. The flexible fiber skeleton 5 is a cylindrical skeleton woven from high-strength fibers. Its sidewall has four rectangular arrayed embedding slots 6 to provide directional arrangement space for the cable cores. The skeleton 3 is composed of the flexible fiber skeleton 5 and four embedding strips 7. The embedding strips 7 are made of engineering plastic with an elastic modulus of 1-5 GPa and are interference-fitted with the embedding slots 6. The elastic pressure is used to press and fix the multi-core components 4, which consist of metal cores 9 and insulation layers 8, to form a mechanical interlocking structure. The sidewall of the flexible fiber skeleton 5 has four rectangular arrayed embedding slots 6. The four embedding strips 7 are interference-fitted with the embedding slots 6 respectively. Each set of multi-core components 4 includes a metal core 9 and an insulation layer 8 covering it. The metal core 9 is a conductive core made of copper or aluminum. Electrical isolation between adjacent cores is achieved through the insulation layer 8. The multi-core components 4 are fixed in the embedding slots 6 by the elastic pressure of the embedding strips 7.

[0026] This utility model provides a multi-core cable structure with a wear-resistant protective sleeve. The interference fit structure of the flexible fiber skeleton 5 and the insert strip 7 locks the core structure composed of the metal core 9 and the insulation layer 8 into the insert groove 6 through elastic pressure, forming a mechanical interlocking effect. Compared with the rubber support frame of the traditional technology, this design greatly improves the compressive strength of the cable under high pressure environment and can improve the service life of the multi-core cable.

[0027] In one embodiment provided by this utility model, such as Figure 5As shown, the outer sheath assembly 1 includes an insulating sheath 10, which is an EPDM rubber layer covering a flexible fiber skeleton 5. The inner wall of the insulating sheath 10 is in close contact with the embedded strips 7, forming a first-level electrical isolation barrier. The insulating sheath 10 wraps around the flexible fiber skeleton 5, and the inner wall of the insulating sheath 10 is in contact with the four embedded strips 7. An armored protective layer 11 is wrapped around the outside of the insulating sheath 10. The armored protective layer 11 is a stainless steel wire braided layer that covers the outside of the insulating sheath 10, resisting external cutting and puncture. The armored protective layer 11 is a stainless steel wire braided layer, and the outer surface of the armored protective layer 11 is covered with… The material is covered with an elastic thick skin layer 12, which is made of silicone rubber. This layer absorbs impact energy and buffers vibrations to prevent damage to the internal structure. The outer surface of the elastic thick skin layer 12 is designed with a honeycomb-shaped vesicle layer 13. The honeycomb-shaped vesicle layer 13 is molded on the outer surface of the elastic thick skin layer 12 to form a honeycomb structure with a porosity of 30%-50%, which disperses bending stress through non-uniform deformation. The honeycomb-shaped vesicle layer 13 is wrapped with an outer protective layer 14, which is composed of an inner skin layer 15 of thermoplastic polyurethane and an aramid fabric layer 16 bonded together with epoxy resin, providing surface abrasion-resistant protection.

[0028] In another embodiment provided by this utility model, such as Figure 6 As shown, the outer protective layer 14 includes an inner skin layer 15 and a fabric layer 16. The inner skin layer 15 is thermally bonded with an elastic thick skin layer 12 with a vesicle layer 13. The aramid fabric layer 16 is bonded to the inner skin layer 15 with epoxy resin. There are equidistantly distributed cavities 17 between the fabric layer 16 and the inner skin layer 15. There are equidistantly distributed columnar cavities between the inner skin layer 15 and the aramid fabric layer 16, which are filled with flame-retardant and heat-insulating material 18 to form a heat insulation barrier at high temperatures. The cavity 17 is filled with flame-retardant and heat-insulating material 18. Example 1

[0029] A multi-core cable structure with a wear-resistant protective sheath includes an outer sheath assembly 1 and a multi-core assembly 2. The outer sheath assembly 1 covers the outside of the multi-core assembly 2. The multi-core assembly 2 includes a skeleton component 3 and four sets of multi-core components 4. The flexible fiber skeleton 5 is a cylindrical skeleton woven from high-strength fibers, and its sidewall has four rectangular arrayed embedding slots 6 to provide directional arrangement space for the cable cores. The skeleton component 3 is composed of the flexible fiber skeleton 5 and four embedding strips 7. The embedding strips 7 are made of engineering plastic with an elastic modulus of 1-5 GPa and are connected to the embedding slots 6. An interference fit is used to press and fix the multi-core component 4, which consists of a metal core 9 and an insulating layer 8, using elastic pressure to form a mechanical interlocking structure. The side wall of the flexible fiber skeleton 5 has four rectangular arrayed embedding slots 6. The four embedding strips 7 are respectively interference-fitted with the embedding slots 6. Each set of multi-core components 4 includes a metal core 9 and an insulating layer 8 covering it. The metal core 9 is made of copper or aluminum conductive core. Electrical isolation between adjacent cores is achieved through the insulating layer 8. The multi-core component 4 is fixed in the embedding slot 6 by the elastic pressure of the embedding strips 7. Example 2

[0030] This embodiment further defines the features of Embodiment 1. The outer sheath assembly 1 includes an insulating sleeve 10, which is an EPDM rubber layer covering the flexible fiber skeleton 5. The inner wall of the insulating sleeve is in close contact with the embedded strips 7, forming a first-level electrical isolation barrier. The insulating sleeve 10 wraps around the flexible fiber skeleton 5, and the inner wall of the insulating sleeve 10 is in contact with the four embedded strips 7. An armored protective layer 11, a stainless steel wire braided layer, covers the outside of the insulating sleeve 10, resisting external cutting and puncture. The armored protective layer 11 is a stainless steel wire braided layer, and an elastic thick skin layer 12, made of silicone rubber, wraps around it, absorbing impact energy and buffering vibrations to prevent damage to the internal structure. The outer surface of the elastic thick skin layer 12 is designed with a honeycomb-shaped vesicle layer 13. The honeycomb-like vesicle layer 13 is molded on the outer surface of the elastic thick skin layer 12 to form a honeycomb structure with a porosity of 30%-50%, which disperses bending stress through non-uniform deformation. The honeycomb-like vesicle layer 13 is wrapped with an outer protective layer 14, which is composed of an inner skin layer 15 of thermoplastic polyurethane and an aramid fabric layer 16 bonded together with epoxy resin, providing surface wear-resistant protection. The outer protective layer 14 includes an inner skin layer 15 and a fabric layer 16. The inner skin layer 15 is thermally bonded to the elastic thick skin layer 12 with the vesicle layer 13. The aramid fabric layer 16 is bonded to the inner skin layer 15 with epoxy resin. There are equidistantly distributed cavities 17 between the fabric layer 16 and the inner skin layer 15. There are also equidistantly distributed columnar cavities between the inner skin layer 15 and the aramid fabric layer 16, which are filled with flame-retardant and heat-insulating material 18 to form a heat insulation barrier at high temperatures. The cavity 17 is filled with flame-retardant and heat-insulating material 18.

[0031] Working principle: The interference fit between the flexible fiber skeleton 5 and the insert strip 7 locks the multi-core component 4 into the insert groove 6, preventing core displacement under high pressure; the insulating sheath 10 achieves electrical isolation, the armored protective layer 11 and the elastic thick skin layer 12 work together to resist mechanical damage, the honeycomb vesicle layer 13 disperses bending stress through pore deformation, and the flame-retardant heat-insulating material 18 made of boron nitride composite material forms a stable heat-insulating layer in the cavity 17, which, together with the aramid fabric layer 16, blocks the spread of flame.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-core cable structure with a wear-resistant protective sheath, comprising an outer sheath assembly (1) and a multi-core assembly (2), characterized in that: The outer skin assembly (1) covers the outside of the multi-core assembly (2). The multi-core assembly (2) includes a skeleton (3) and four sets of multi-core components (4). The skeleton (3) is composed of a flexible fiber skeleton (5) and four insert strips (7). The side wall of the flexible fiber skeleton (5) is provided with four insert grooves (6) arranged in a rectangular array. The four insert strips (7) are respectively press-fitted with the insert grooves (6). Each set of multi-core components (4) includes a metal core (9) and an insulating layer (8) covering it. The multi-core components (4) are fixed in the insert grooves (6) by the elastic pressure of the insert strips (7).

2. The multi-core cable structure with a wear-resistant protective sleeve according to claim 1, characterized in that, The outer skin assembly (1) includes an insulating sleeve (10) which is wrapped around the flexible fiber skeleton (5) and the inner wall of the insulating sleeve (10) is in contact with four embedded strips (7).

3. The multi-core cable structure with a wear-resistant protective sleeve according to claim 2, characterized in that, The insulating sheath (10) is covered with an armored protective layer (11), which is a stainless steel wire braided layer, and the armored protective layer (11) is covered with an elastic thick leather layer (12).

4. The multi-core cable structure with a wear-resistant protective sleeve according to claim 3, characterized in that, The outer surface of the elastic thick skin layer (12) is designed with a honeycomb vesicle layer (13), and the honeycomb vesicle layer (13) is wrapped with an outer protective layer (14).

5. A multi-core cable structure with a wear-resistant protective sleeve according to claim 4, characterized in that, The outer protective layer (14) includes an inner skin layer (15) and an aramid fabric layer (16). The inner skin layer (15) is thermally bonded with an elastic thick skin layer (12) with a vesicle layer (13). The aramid fabric layer (16) is bonded to the inner skin layer (15) with epoxy resin.

6. The multi-core cable structure with a wear-resistant protective sleeve according to claim 5, characterized in that, The fabric layer (16) and the inner skin layer (15) are provided with equidistant cavities (17), and the cavity (17) is filled with flame-retardant and heat-insulating material (18).

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