Tensile-resistant, flame-retardant, shielded cable construction

Abstract

The utility model provides an anti -tensile flame -retardant shielding cable line structure, including flexible support framework, the outside of flexible support framework is evenly provided with a plurality of arc clamping groove, a plurality of the inside of arc clamping groove is provided with cable core body, a plurality of cable core body's outside is provided with aluminium foil shield layer. Through setting up the combination structure of flexible support framework and anti -tensile cotton core, aramid fiber, can promote the overall tensile property of cable synchronously, has improved the problem that cable is easy to break under tension, the double shielding design of collocation aluminium foil shield layer and aluminium magnesium braided net, the ground wire core body's ground guiding is combined, can overall block high low frequency electromagnetic interference, improve signal transmission distortion problem, the flame -retardant PP cotton between aluminium foil and braided net cooperates each insulation protection structure, can effectively block flame spread and insulate corrosive medium, improve cable fire -resistant anticorrosive capacity, realize the comprehensive performance promotion of anti -tensile, anti -interference, flame -retardant.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a tensile-resistant, flame-retardant shielded cable structure. Background Technology

[0002] Tensile-resistant and flame-retardant shielded cables are widely used in industrial control, rail transportation, building power distribution and other fields. They need to meet the requirements of mechanical tensile strength, fire resistance and flame retardancy and electromagnetic shielding at the same time. Existing cables are usually arranged from the inside out as conductor, insulation layer, tensile layer, shielding layer and outer sheath. The tensile layer is mostly wrapped with a single fiber tape or the outer sheath is reinforced with fibers. The shielding layer adopts copper wire braiding or copper tape wrapping structure. The basic functions are achieved through the nesting of each layer to ensure the signal and power transmission of the cable in complex environments.

[0003] However, the existing structure has shortcomings. The tensile force is mainly borne by the outer sheath or a single tensile layer, and the stress is difficult to be evenly transmitted to the inside of the cable. Long-term use can easily lead to cracking of the sheath, or even breakage of the internal conductor or shielding layer, affecting the transmission stability. On the other hand, the shielding layer does not fit well with the adjacent structure and lacks effective protection. It is easily damaged or deformed by external forces or environmental factors, resulting in a decrease in shielding effect and failing to meet the anti-interference requirements of high-precision equipment. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a tensile-resistant and flame-retardant shielded cable structure to solve the problems mentioned in the background. This utility model has a novel structure. By setting up a combination structure of flexible support skeleton, tensile-resistant cotton core, and aramid fiber, the overall tensile performance of the cable can be improved simultaneously, thus alleviating the problem of easy breakage under tension. Combined with the double shielding design of aluminum foil shielding layer and aluminum-magnesium braided mesh, and grounding guidance of ground wire core, it can comprehensively block high and low frequency electromagnetic interference and improve signal transmission distortion. At the same time, the flame-retardant PP cotton between aluminum foil and braided mesh, together with various insulation protection structures, can effectively block the spread of flames and isolate corrosive media, improve the fire resistance and corrosion resistance of the cable, and achieve a comprehensive improvement in tensile strength, interference resistance, and flame retardancy.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a tensile-resistant and flame-retardant shielded cable structure, including a flexible support frame, wherein multiple arc-shaped slots are evenly provided on the outer side of the flexible support frame, and cable cores are provided inside the multiple arc-shaped slots. An aluminum foil shielding layer is provided on the outer side of the multiple cable cores, and an arc-shaped protrusion facing inward is provided on one side of the aluminum foil shielding layer. A ground wire core is provided inside the arc-shaped protrusion, and an aluminum-magnesium braided mesh is provided on the outer side of the arc-shaped protrusion. A PVC sleeve is fixedly connected to the outer side of the aluminum-magnesium braided mesh, and a braided mesh tube is sleeved on the outer side of the PVC sleeve.

[0006] Furthermore, the cable core includes multiple tin-plated copper wires disposed inside the arc-shaped slot, aramid fibers are disposed inside the multiple tin-plated copper wires, and an insulating layer is extruded and coated on the outside of the multiple tin-plated copper wires. The tin-plated copper wires are twisted and connected with the aramid fibers, and the aramid fibers are located at the center of the twisting.

[0007] Furthermore, the ground wire core includes a pure copper ground wire disposed on the inner wall of the arc-shaped protrusion, and a tin-plated soft copper strip is tightly wound around the outside of the pure copper ground wire.

[0008] Furthermore, the inner wall of the flexible support frame is fixedly connected with a tensile-resistant cotton core.

[0009] Furthermore, the inner wall of the aluminum foil shielding layer is equipped with multiple modified PP wire core limiting strips, and multiple particle protrusions are fixedly connected to the outer side of the modified PP wire core limiting strips. The modified PP wire core limiting strips are disposed at the gaps between multiple cable cores, and the particle protrusions are in contact with the outer side of the insulation layer.

[0010] Furthermore, flame-retardant PP cotton is filled between the aluminum foil shielding layer and the aluminum-magnesium woven mesh.

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

[0012] 1. This utility model, through the combination structure of a flexible support skeleton, tensile cotton core, and aramid fiber, can simultaneously improve the overall tensile performance of the cable, thus addressing the problem of cable breakage under tension. Combined with the dual shielding design of aluminum foil shielding layer and aluminum-magnesium braided mesh, and grounding guidance of the ground wire core, it can comprehensively block high and low frequency electromagnetic interference and improve signal transmission distortion. At the same time, the flame-retardant PP cotton between the aluminum foil and the braided mesh, along with various insulation protection structures, can effectively block the spread of flames and isolate corrosive media, improving the cable's fire resistance and corrosion resistance, and achieving a comprehensive improvement in tensile strength, interference resistance, and flame retardancy.

[0013] 2. This utility model, by setting modified PP core limiting strips and outer particle protrusions, can accurately fix the position of multiple cable cores, avoid the cores rubbing against each other when the cable is bent, improve the problem of easy wear of the insulation layer, and at the same time, the particle protrusions can reduce hard contact, further protect the integrity of the core structure, and extend the service life of the cable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the tensile-resistant and flame-retardant shielded cable structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the tensile-resistant and flame-retardant shielded cable structure of this utility model;

[0016] Figure 3This is a schematic diagram of the aluminum foil shielding layer structure of the tensile-resistant and flame-retardant shielded cable structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the cable core structure of the tensile-resistant and flame-retardant shielded cable structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the internal structure of the cable core of the tensile-resistant and flame-retardant shielded cable structure of this utility model.

[0019] In the diagram: 1. Flexible support frame; 2. Arc-shaped slot; 3. Cable core; 301. Tinned copper wire; 302. Aramid fiber; 303. Insulation layer; 4. Aluminum foil shielding layer; 5. Arc-shaped protrusion; 6. Ground wire core; 601. Pure copper ground wire; 602. Tinned soft copper strip; 7. Aluminum-magnesium braided mesh; 8. PVC sheath; 9. Braided mesh tube; 10. Tensile cotton core; 11. Modified PP wire core limiting strip; 12. Particle protrusion; 13. Flame-retardant PP cotton. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Please refer to Figures 1 to 5This utility model provides a technical solution: a tensile-resistant and flame-retardant shielded cable structure, including a flexible support frame 1. Multiple arc-shaped grooves 2 are evenly distributed on the outer side of the flexible support frame 1. Cable cores 3 are disposed inside each of the multiple arc-shaped grooves 2. An aluminum foil shielding layer 4 is disposed on the outer side of each cable core 3. An inwardly oriented arc-shaped protrusion 5 is disposed on one side of the aluminum foil shielding layer 4. A ground wire core 6 is disposed inside the arc-shaped protrusion 5. An aluminum-magnesium braided mesh 7 is disposed on the outer side of the arc-shaped protrusion 5. A PVC sleeve 8 is fixedly connected to the outer side of the aluminum-magnesium braided mesh 7. A braided mesh tube 9 is fitted onto the outer side of the PVC sleeve 8. A tensile-resistant cotton core 10 is fixedly connected to the inner wall of the flexible support frame 1. Flame-retardant PP cotton 13 is filled between the aluminum foil shielding layer 4 and the aluminum-magnesium braided mesh 7. In the assembly and operation of the tensile-resistant and flame-retardant shielded cable structure, the flexible support frame 1 is used as the core foundation. The evenly spaced arc-shaped grooves 2 on its outer side provide precise installation positioning for the cable cores 3, ensuring the orderly arrangement of multiple cable cores 3 and preventing mutual compression. The tensile-resistant cotton core 10 fixedly connected to the inner wall of the flexible support frame 1 can disperse the tensile force when the cable is subjected to external pulling force, improving the overall tensile performance. Subsequently, an aluminum foil shielding layer 4 is set on the outside of the cable cores 3. The aluminum foil shielding layer 4 can effectively reflect external high-frequency electromagnetic interference, ensuring the stability of signal or power transmission by the cable cores 3. An arc-shaped protrusion 5 on one side of the aluminum foil shielding layer 4 facing inward provides an independent space for the ground core 6, preventing mutual interference between the ground core 6 and the cable cores 3. Simultaneously, the structural design of the arc-shaped protrusion 5 enhances the overall support of the aluminum foil shielding layer 4. Then, on the arc-shaped protrusion... 5. An aluminum-magnesium braided mesh 7 is installed on the outer side. The aluminum-magnesium braided mesh 7 can enhance the shielding effect against low-frequency electromagnetic interference, forming a dual shielding system of "full coverage of high and low frequencies" with the aluminum foil shielding layer 4. On the other hand, it can protect the inner aluminum foil shielding layer 4 from mechanical wear. Flame-retardant PP cotton 13 is filled between the aluminum foil shielding layer 4 and the aluminum-magnesium braided mesh 7. The flame-retardant PP cotton 13 can further buffer the interlayer friction and block the spread of flames in fire scenarios, thus achieving flame-retardant function. Then, a PVC sleeve 8 is fixedly connected to the outside of the aluminum-magnesium braided mesh 7. The PVC sleeve 8 can isolate external water vapor, oil and other corrosive media and protect the internal structure. Finally, a braided mesh tube 9 is fitted on the outside of the PVC sleeve 8. The braided mesh tube 9 can enhance the wear resistance of the outer layer of the cable and adapt to the use scenarios of frequent movement or friction. The overall structure achieves tensile strength, flame retardancy, shielding and protection functions simultaneously through layered design.

[0022] In this embodiment, the cable core 3 includes multiple tin-plated copper wires 301 disposed inside the arc-shaped slot 2. Aramid fibers 302 are disposed inside the multiple tin-plated copper wires 301, and an insulation layer 303 is extruded and coated on the outer side of the multiple tin-plated copper wires 301. The tin-plated copper wires 301 and the aramid fibers 302 are twisted together, with the aramid fibers 302 located at the center of the twist. Multiple modified PP core limiting strips 11 are installed on the inner wall of the aluminum foil shielding layer 4. Multiple particle protrusions 12 are fixedly connected to the outer side of the modified PP core limiting strips 11. The modified PP core limiting strips 11 are disposed at the gaps between the multiple cable cores 3, and the particle protrusions 12 are in contact with the outer side of the insulation layer 303. The ground wire core 6 includes a pure copper ground wire 601 disposed on the inner wall of the arc-shaped protrusion 5, and a tin-plated soft copper strip 602 is tightly wound around the outer side of the pure copper ground wire 601. In the assembly and operation of the core transmission components and auxiliary limiting structures of the cable, the cable core 3 is prepared by first placing aramid fiber 302 in the center, and then twisting and connecting multiple tin-plated copper wires 301 around the aramid fiber 302. The aramid fiber 302 provides core tensile support for the cable core 3 due to its high strength characteristics, preventing the tin-plated copper wires 301 from breaking under tension. The tin-plated copper wires 301 serve as the conductive body, and their surface plating prevents copper wire oxidation, ensuring stable conductivity. Subsequently, an insulation layer 303 is wrapped around the outside of the cable core 3 through an extrusion process. The insulation layer 303 can isolate adjacent cable cores 3, prevent short circuits, and ensure independent transmission of power or signals. At the same time, a modified PP core limiting strip 11 is installed on the inner wall of the aluminum foil shielding layer 4 and placed in the gap between the multiple cable cores 3. The modified PP core limiting strip 11 can further fix the cable core 3. The cable core 3 is positioned to prevent displacement and friction when the cable is bent. The granular protrusions 12 on the outside of the modified PP core limiting strip 11 contact the outside of the insulation layer 303, which increases the stability of the fit between the limiting strip and the cable core 3 and reduces interlayer hard friction through the granular structure, protecting the insulation layer 303. In addition, the assembly of the ground core 6 places the pure copper ground wire 601 on the inner wall of the arc-shaped protrusion 5. The pure copper ground wire 601 serves as a safe grounding channel, which can quickly conduct leakage current or shielding layer interference current. The tin-plated soft copper strip 602 is tightly secured to the outside of the pure copper ground wire 601 by winding. The tin-plated soft copper strip 602 can enhance the flexibility of the pure copper ground wire 601 to adapt to cable bending, and can also improve the anti-corrosion performance through the plating. At the same time, it strengthens the conductive connection between the ground wire and the aluminum foil shielding layer 4, ensuring reliable grounding function.

[0023] When using the device, the cable achieves multiple functions through a layered collaborative design. The core is provided by a flexible support frame 1, the arc-shaped slot 2 positions the cable core 3, and the inner wall tensile cotton core 10 and the aramid fiber 302 in the center of the cable core 3 form an inner and outer tensile system to resist tensile force. The cable core 3 transmits signals / power through tinned copper wire 301, the insulation layer 303 prevents short circuits, the modified PP core limiting strip 11 fixes the core to avoid friction, the aluminum foil shielding layer 4 and the aluminum-magnesium braided mesh 7 form a double shield to block high and low frequency interference respectively, and the flame-retardant PP cotton 13 plays a buffering and flame-retardant role. The pure copper ground wire 601 of the ground core 6 and the tinned soft copper strip 602 conduct interference current to ensure grounding safety. The outer PVC sleeve 8 and the braided mesh tube 9 provide corrosion protection and wear resistance in turn. The whole system achieves tensile strength, flame retardancy, anti-interference and stable transmission functions.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tensile-resistant and flame-retardant shielded cable structure, comprising a flexible support frame (1), characterized in that: The flexible support frame (1) has multiple arc-shaped slots (2) evenly distributed on its outer side. Each arc-shaped slot (2) contains a cable core (3). An aluminum foil shielding layer (4) is provided on the outer side of each cable core (3). An arc-shaped protrusion (5) facing inward is provided on one side of the aluminum foil shielding layer (4). A ground wire core (6) is provided inside the arc-shaped protrusion (5). An aluminum-magnesium braided mesh (7) is provided on the outer side of the arc-shaped protrusion (5). A PVC sleeve (8) is fixedly connected to the outer side of the aluminum-magnesium braided mesh (7). A braided mesh tube (9) is sleeved on the outer side of the PVC sleeve (8).

2. The tensile-resistant and flame-retardant shielded cable structure according to claim 1, characterized in that: The cable core (3) includes a plurality of tin-plated copper wires (301) disposed inside the arc-shaped slot (2). Aramid fibers (302) are disposed inside the plurality of tin-plated copper wires (301). An insulating layer (303) is extruded and coated on the outside of the plurality of tin-plated copper wires (301). The tin-plated copper wires (301) and the aramid fibers (302) are twisted together, and the aramid fibers (302) are located at the center of the twisting.

3. The tensile-resistant and flame-retardant shielded cable structure according to claim 1, characterized in that: The ground core (6) includes a pure copper ground wire (601) disposed on the inner wall of the arc-shaped protrusion (5), and a tin-plated soft copper strip (602) is tightly wound around the outside of the pure copper ground wire (601).

4. The tensile-resistant and flame-retardant shielded cable structure according to claim 1, characterized in that: The inner wall of the flexible support frame (1) is fixedly connected with a tensile cotton core (10).

5. The tensile-resistant and flame-retardant shielded cable structure according to claim 2, characterized in that: The inner wall of the aluminum foil shielding layer (4) is equipped with multiple modified PP wire core limiting strips (11), and multiple particle protrusions (12) are fixedly connected to the outer side of the modified PP wire core limiting strips (11). The modified PP wire core limiting strips (11) are set at the gaps of multiple cable cores (3), and the particle protrusions (12) are in contact with the outer side of the insulation layer (303).

6. The tensile-resistant flame-retardant shielded cable structure according to claim 1, characterized in that: Flame-retardant PP cotton (13) is filled between the aluminum foil shielding layer (4) and the aluminum-magnesium woven mesh (7).

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