A type of cable designed to prevent breakage

Abstract

This utility model relates to the field of cable technology, specifically to a cable designed to prevent damage. The cable employs a multi-layered composite protective structure, comprising, from the inside out: a conductor, a conductor insulation layer, a conductor shielding layer, a cabling filling layer, a wrapping layer, an inner sheath, a waterproof layer, an inner lining layer, an armor layer, an outer lining layer, a corrugated buffer layer, a fire-retardant layer, and an outer sheath. Each functional layer forms a tightly integrated protective system through specific connection methods. The conductor insulation layer ensures electrical insulation performance, the conductor shielding layer provides electromagnetic shielding and water resistance, the corrugated buffer layer absorbs external impacts through a special structure, and the fire-retardant layer forms a high-temperature protective barrier. By optimizing the material selection and structural design of each layer, this utility model enables the cable to maintain excellent conductivity while also providing multiple protective functions such as waterproofing, fire resistance, and impact resistance. The synergistic effect of each layer effectively improves the reliability and service life of the cable under complex operating conditions.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a cable designed to prevent breakage. Background Technology

[0002] ① In traditional technology, conventional cables mostly use a single conductor material with a simple insulation structure. While this design can meet basic conductivity requirements, it has significant shortcomings under complex operating conditions. The insulation layer often only has a single insulation function, lacking comprehensive protective properties such as water resistance and fire resistance, making the cable prone to insulation failure in humid or high-temperature environments. The shielding structure is mostly a single layer of metal braid, which cannot effectively meet the requirements of electromagnetic shielding and longitudinal water resistance. The outer protection generally uses a homogeneous sheath, which has limited impact resistance and abrasion resistance, making it easy to break under mechanical forces. These defects together result in the short service life and high failure rate of traditional cables, making it difficult to meet the increasingly demanding reliability requirements of modern industry.

[0003] ② To address the above problems, existing technologies employ a composite shielding structure on the outer layer of the conductor, combining copper wire braided mesh with water-blocking tape. This achieves both electromagnetic shielding and enhanced longitudinal water-blocking capability. The insulation layer utilizes a double-layer co-extrusion process, with an inner insulating layer and an outer water-blocking layer, improving upon the protective defects of traditional single-layer insulation. The outer sheath incorporates a corrugated structure design, enhancing compressive strength through geometric changes. These improvements effectively solve the problem of limited protective functions in traditional cables, significantly extending the cable's service life in humid environments.

[0004] ③ However, the existing technology has revealed new technical defects during implementation: the interfacial bonding strength between the copper mesh and the water-blocking tape in the composite shielding layer is insufficient, which easily leads to interlayer delamination when the cable is repeatedly bent, resulting in a decrease in water-blocking performance; although the corrugated sheath can resist pressure, the troughs become stress concentration areas, which are prone to fatigue cracking under long-term vibration conditions; the double-layer insulation structure increases the radial dimension of the cable, increasing the laying space requirements. These new problems stem from imperfect material interface treatment processes, failure to consider dynamic load adaptability in structural design, and volume expansion caused by functional superposition, ultimately limiting the application effect of this technology in space-constrained scenarios. Utility Model Content

[0005] The purpose of this utility model is to provide a cable that prevents damage, and solves the technical problems of insufficient interface bonding strength of the shielding layer, easy fatigue cracking of the corrugated sheath, and excessive overall radial dimension in existing composite protective cables.

[0006] To achieve the above objectives, this utility model provides a cable designed to prevent damage, comprising multiple sets of conductors, each set of conductors being radially covered with a conductor insulation layer, the conductor insulation layer being radially covered with a conductor shielding layer, the shielding layer being radially covered with a cable filling layer, the cable filling layer being radially covered with a wrapping layer, the wrapping layer being radially covered with an inner sheath, the inner sheath being radially covered with a waterproof layer, the waterproof layer being radially covered with an inner lining layer, the inner lining layer being radially covered with an armor layer, the armor layer being radially covered with an outer lining layer, the outer lining layer being radially covered with a corrugated buffer layer, the corrugated buffer layer being radially covered with a fire-retardant layer, and the fire-retardant layer being radially covered with an outer sheath.

[0007] The conductor is a composite stranded structure of annealed copper wire and aluminum-magnesium alloy wire, and the conductor insulation layer is a three-layer co-extruded cross-linked polyethylene, with an inner layer of semi-conductive water-resistant layer and a middle layer of insulation layer.

[0008] The conductor shielding layer is a composite wrapping of copper wire braided mesh and semi-conductive resistive water tape, and the cable filling layer contains superabsorbent resin particles and ceramic flame-retardant powder.

[0009] The wrapping layer is an overlapping wrapping of non-woven fabric tape coated with flame-retardant adhesive on both sides, and the inner sheath is an extruded layer of nano-magnesium hydroxide modified flame-retardant polyolefin.

[0010] The waterproof layer is a longitudinally welded aluminum-plastic composite strip, with the overlap seams filled with hot melt sealant; the inner lining layer is an asphalt-impregnated high-grammage glass fiber strip; and the armor layer is a bidirectional woven structure of galvanized steel wire and aramid fiber.

[0011] The outer liner is a flame-retardant epoxy resin coating, and the corrugated buffer layer is made of thermoplastic polyurethane elastomer, which is in the form of equidistant trapezoidal waves with silicone microspheres embedded in the troughs.

[0012] The fire-retardant layer is a tightly wound ceramicized silicone rubber tape, and the outer sheath is made of polyurethane material with an interlocking grid anti-slip texture molded on its outer surface.

[0013] This utility model discloses a cable designed to prevent damage, achieving excellent comprehensive protection performance through an innovative multi-layer composite structure design. The cable core uses multiple conductors as current transmission carriers, and is sequentially covered with a conductor insulation layer, a conductor shielding layer, a cabling filler layer, a wrapping layer, an inner sheath, a waterproof layer, an inner lining layer, an armor layer, an outer lining layer, a corrugated buffer layer, a fire-retardant layer, and an outer sheath. Each functional layer forms a tightly integrated structure through specific connection methods. The conductor insulation layer tightly covers the conductor surface, the conductor shielding layer is evenly wrapped around the outside of the insulation layer, the cabling filler layer fully fills the gaps between the conductor cores, the wrapping layer fixes the cable cores as a whole, the inner sheath serves as a primary protective layer covering the wrapping layer, the waterproof layer forms a complete sealing barrier, the inner lining layer provides an installation base for the armor layer, the armor layer is fixed by the outer lining layer, the corrugated buffer layer absorbs external impacts through its special structure, the fire-retardant layer forms a high-temperature protective barrier, and the outermost sheath provides final protection. This layered protective structure enables the cable to maintain excellent conductivity while providing multiple protective functions such as water resistance, fire resistance, and impact resistance. The synergistic effect of each layer ensures the long-term reliable operation of the cable under complex working conditions. Through this structural design, the cable achieves effective isolation between the conductor system and the external environment, preventing the intrusion of external factors such as moisture and flames, and resisting damage from mechanical forces, ultimately achieving the technical effects of extending service life and improving operational stability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the planar structure of an embodiment of the present utility model.

[0017] In the diagram: 101, multiple conductors; 102, conductor insulation layer; 103, conductor shielding layer; 104, cabling filling layer; 105, wrapping layer; 106, inner sheath; 107, waterproof layer; 108, inner lining layer; 109, armor layer; 110, outer lining layer; 111, corrugated buffer layer; 112, fire-retardant layer; 113, outer sheath. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0019] Please see Figures 1-2 .

[0020] This utility model provides a cable designed to prevent breakage. The conductor is constructed from a composite stranded structure of annealed copper wire and aluminum-magnesium alloy wire, ensuring both excellent conductivity and improved mechanical strength. A conductor insulation layer 102 is radially wrapped around the conductor. This insulation layer 102 is made of three layers of co-extruded cross-linked polyethylene material. The inner layer is a semi-conductive water-resistant layer, used to uniformly distribute the electric field on the conductor surface and prevent longitudinal water penetration. The middle layer is an insulation layer, providing the main electrical insulation performance. The outer layer is an adhesive layer, used to enhance the bonding force with the shielding layer. A conductor shielding layer 103 is radially wrapped around the conductor insulation layer 102. The conductor shielding layer 103 is composed of a copper wire braided mesh and a semi-conductive... The cable is constructed using a composite water-blocking tape. Copper wire braided mesh provides electromagnetic shielding and mechanical protection, while semi-conductive water-blocking tape further enhances its water-blocking performance. A cable filling layer 104 is radially outer of the conductor shielding layer 103. This layer contains a mixture of superabsorbent resin particles and ceramic flame-retardant powder. The superabsorbent resin particles swell upon contact with water, effectively blocking water, while the ceramic flame-retardant powder forms a ceramic layer at high temperatures, providing fire resistance. A wrapping layer 105 is radially outer of the cable filling layer 104. This wrapping layer 105 uses double-sided flame-retardant coated non-woven fabric tape for overlapping wrapping, used to fix the cable core structure and provide flame-retardant protection. An inner sheath 10 is extruded radially outer of the wrapping layer 105. 6. The inner sheath 106 is made of nano-magnesium hydroxide modified flame-retardant polyolefin material. Nano-magnesium hydroxide, as a flame retardant, can improve the flame-retardant performance of the material. A waterproof layer 107 is provided radially outside the inner sheath 106. The waterproof layer 107 is made of longitudinally wrapped welded aluminum-plastic composite tape, and the overlap seams are filled with hot melt sealant to form a complete radial waterproof barrier. An inner lining layer 108 is wrapped radially outside the waterproof layer 107. The inner lining layer 108 is made of asphalt-impregnated high-grammage glass fiber tape to buffer mechanical impact and provide a flat base surface for the armor layer 109. An armor layer 109 is provided radially outside the inner lining layer 108. The armor layer 109 is made of bidirectional braided galvanized steel wire and aramid fiber. Galvanized steel wire provides compressive strength, while aramid fiber enhances tensile strength. An outer liner 110 is fixed radially to the outer side of the armor layer 109. The outer liner 110 is a flame-retardant epoxy resin coating used to protect the armor layer 109 from corrosion. A corrugated buffer layer 111 is provided on the outer side of the outer liner 110. The corrugated buffer layer 111 is made of thermoplastic polyurethane elastomer and extends along the cable axis in an equidistant trapezoidal wave pattern, with silicone microspheres embedded in the troughs. This structure can effectively absorb and disperse external impact energy. A fire-retardant layer 112 is wrapped radially to the outer side of the corrugated buffer layer 111. The fire-retardant layer 112 is made of tightly wound ceramicized silicone rubber tape, which can form a ceramic protective layer at high temperatures to prevent the spread of flames.An outer sheath 113 is extruded radially outward from the fire-retardant layer 112. The outer sheath 113 is made of polyurethane and has an interlaced grid anti-slip texture molded on its outer surface. Polyurethane has excellent wear resistance, and the surface anti-slip texture increases friction to prevent cable displacement. This implementation achieves multiple protective functions for the cable, including waterproofing, fireproofing, and protection against mechanical damage, through the synergistic effect of each layer of components.

[0021] Working principle: The conductor adopts a composite stranded structure of annealed copper wire and aluminum-magnesium alloy wire, which significantly improves mechanical strength while ensuring conductivity, making the cable less prone to breakage when bent; the three-layer co-extruded structure of the conductor insulation layer 102 uses an inner semi-conductive resistive water layer to uniformly distribute the electric field on the conductor surface and prevent longitudinal water penetration, a middle insulation layer to ensure stable electrical insulation performance, and an outer adhesive layer to enhance the bonding force with the shielding layer. This design ensures both insulation reliability and extends service life; the copper wire braided mesh of the conductor shielding layer 103 provides electromagnetic shielding and mechanical protection. The semiconducting water-resistant tape forms a double water-blocking barrier, effectively preventing moisture from penetrating the conductor area; the super-absorbent resin particles in the cable filling layer 104 rapidly expand upon contact with water to form a gel that blocks the channels, and together with the ceramicized flame-retardant powder, melt at high temperatures to form a ceramic protective layer, achieving a dual technical effect of water blocking and fire prevention; the double-sided adhesive-coated non-woven fabric tape of the wrapping layer 105 tightly fixes the cable core structure, and its flame-retardant properties can delay the spread of flames; the nano-magnesium hydroxide modified material of the inner sheath 106 decomposes and absorbs heat and releases flame-retardant gases when heated, significantly improving the flame-retardant rating of the cable; the waterproof layer 1 The aluminum-plastic composite tape of layer 07 forms a completely sealed radial waterproof structure through longitudinal welding and hot-melt sealant filling; the asphalt-impregnated fiberglass tape of the inner liner layer 108 effectively buffers external impacts and provides a flat base for the armor layer 109; the bidirectional braided structure of galvanized steel wire and aramid fiber in the armor layer 109 gives the cable both compressive and tensile strength; the flame-retardant epoxy resin coating of the outer liner layer 110 protects the armor layer 109 from corrosion; the thermoplastic polyurethane elastomer of the corrugated buffer layer 111 absorbs impact energy through trapezoidal corrugated structure deformation, combined with silicone microspheres in the troughs. Further stress dispersion; the tightly wound ceramicized silicone rubber tape of the fireproof and flame-retardant layer 112 quickly forms a hard ceramic layer in the flame; the polyurethane material of the outer sheath 113, combined with the surface interlaced grid anti-slip texture design, significantly improves wear resistance and effectively prevents slippage during laying; each component forms a complete protection system through layer-by-layer protection, with the conductor and insulation system fully protected in the innermost layer, the waterproof and fireproof structure of the middle layer ensuring environmental resistance, and the mechanical protection components of the outer layer effectively resisting various external force damage, ultimately achieving long-term stable operation of the cable in complex environments.

[0022] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A cable against breakage comprising a plurality of groups of conductors (101), characterized in that: The multiple sets of conductors (101) are radially covered with a conductor insulation layer (102), the conductor insulation layer (102) is radially covered with a conductor shielding layer (103), the conductor shielding layer (103) is radially covered with a cabling filling layer (104), the cabling filling layer (104) is radially covered with a wrapping layer (105), the wrapping layer (105) is radially covered with an inner sheath (106), and the inner sheath (106) is radially covered with a waterproof layer (105). 07), the waterproof layer (107) is radially covered with an inner lining layer (108), the inner lining layer (108) is radially covered with an armor layer (109), the armor layer (109) is radially covered with an outer lining layer (110), the outer lining layer (110) is covered with a corrugated buffer layer (111), the corrugated buffer layer (111) is radially covered with a fire-retardant layer (112), and the fire-retardant layer (112) is radially covered with an outer sheath (113).

2. A cable to prevent breakage as claimed in claim 1 wherein: The conductor is a composite stranded structure of annealed copper wire and aluminum-magnesium alloy wire. The conductor insulation layer (102) is a three-layer co-extruded cross-linked polyethylene, with the inner layer being a semi-conductive water-resistant layer and the middle layer being an insulation layer.

3. A cable to prevent breakage as claimed in claim 1 wherein: The conductor shielding layer (103) is a composite wrapping of copper wire braided mesh and semi-conductive resistive water tape, and the cable filling layer (104) contains superabsorbent resin particles and ceramic flame-retardant powder.

4. A cable to prevent breakage as claimed in claim 1 wherein: The wrapping layer (105) is an overlapping wrapping of non-woven fabric tape coated with flame-retardant adhesive on both sides, and the inner sheath (106) is an extruded layer of nano-magnesium hydroxide modified flame-retardant polyolefin.

5. A cable to prevent breakage as defined in claim 1, wherein: The waterproof layer (107) is a longitudinally welded aluminum-plastic composite strip, with the overlap seam filled with hot melt sealant. The inner lining layer (108) is an asphalt-impregnated high-grammage glass fiber strip. The armor layer (109) is a bidirectional woven structure of galvanized steel wire and aramid fiber.

6. A cable to prevent breakage as defined in claim 1, wherein: The outer liner (110) is a flame-retardant epoxy resin coating, and the corrugated buffer layer (111) is made of thermoplastic polyurethane elastomer, extending along the cable axis in an equidistant trapezoidal wave, with silicone microspheres embedded in the troughs.

7. A cable to prevent breakage as defined in claim 1, wherein: The fireproof and flame-retardant layer (112) is a tightly wound ceramicized silicone rubber tape, and the outer sheath (113) is made of polyurethane material with an interlocking grid anti-slip texture molded on its outer surface.

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