A flexible shielded cable with a dismountable shield structure

Abstract

The application discloses a flexible shielding cable with a detachable shielding structure, which comprises a wire core, the surface of the wire core is covered with an insulating sleeve, the outer surface of the insulating sleeve is provided with an elastic layer, the surface of the elastic layer is provided with a protective layer, the surface of the protective layer is sleeved with a shielding structure, and the surface of the shielding structure is sleeved with a rubber sleeve. The detachable outer sleeve, the rubber sleeve with the hollow slot, and the sliding contact between the protective layer and the shielding structure are arranged, so that the external protection, the accurate cutting and the easy separation of the internal part are integrated. The detachable outer sleeve provides a positioning and recovery basis for operation, the hollow slot of the rubber sleeve provides an accurate path for the tool to penetrate and cut the shielding structure, and the sliding contact between the nylon cloth layer on the surface of the protective layer and the inner surface of the shielding structure ensures that the shielding layer can be integrally separated with low resistance after being divided, so that the controllability and convenience of the cable shielding structure are improved.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a flexible shielded cable with a detachable shielding structure. Background Technology

[0002] Flexible shielded cable is a special type of cable that combines flexibility with electromagnetic shielding performance. Its core design purpose is to effectively suppress electromagnetic interference in situations where frequent bending or movement is required.

[0003] For example, patent application number 202321532516.1 published on the China Patent Network, entitled "Flexible Shielded Cable," includes an elastic core strip, twisted pairs, an aluminum foil shielding layer, a braided shielding layer, and a sheath layer. The aluminum foil shielding layer comprises one or more aluminum foil wrapping tapes wrapped around the outside of the twisted pairs. A flexible filler tape is adhered and fixed to the inner side of each aluminum foil wrapping tape, providing elastic buffering between the aluminum foil shielding layer and the twisted pairs. By setting aluminum foil wrapping tapes with adhered flexible filler tapes, an elastic buffer layer is formed between the aluminum foil shielding layer and the twisted pairs. When the cable is bent, the twisted pairs can compress the flexible filler tape, and the contraction of the flexible filler tape creates a certain amount of space between the aluminum foil wrapping tape and the twisted pairs, releasing the tensile stress generated by bending and mitigating conductor fatigue bending leading to breakage or damage. This extends the overall service life of the cable under conditions requiring frequent bending.

[0004] However, existing shielding layers are generally directly wrapped around the surface of the cable. When the shielding layer needs to be removed in some environments, the directly wrapped shielding layer cannot be effectively separated from the required part as required, which affects the applicable scope of the shielded cable.

[0005] Therefore, it is necessary to redesign and modify the flexible shielded cable with a detachable shielding structure. Summary of the Invention

[0006] To address the problems mentioned in the background art, the present invention aims to provide a flexible shielded cable with a detachable shielding structure. This cable has the advantages of a detachable shielding structure and solves the problem that existing shielding layers are generally directly wound around the surface of the cable. When the shielding layer needs to be removed in certain environments, the directly wound shielding layer cannot be effectively separated from the required location, thus affecting the applicability of the shielded cable.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a flexible shielded cable with a detachable shielding structure, comprising a battery core; the battery core serves as the core for the cable's power and signal transmission, and can be selected from different types of conductors such as single-strand solid copper conductors, multi-strand stranded tin-plated copper conductors, and copper-aluminum composite conductors according to actual usage requirements. The multi-strand stranded structure can further enhance the cable's flexibility and resistance to bending fatigue, meeting the needs of frequent movement and reciprocating bending scenarios. The conductive cross-sectional area and number of cores of the battery core can be flexibly configured according to the transmission power and signal type, adapting to various electrical transmission requirements such as low-voltage power distribution, analog signal transmission, and digital signal transmission.

[0008] The surface of the wire core is covered with an insulating sleeve, the outer surface of the insulating sleeve is provided with an elastic layer, the surface of the elastic layer is provided with a protective layer, the surface of the protective layer is provided with a shielding structure, the surface of the shielding structure is provided with a rubber sleeve, the rubber sleeve is elastic and has a hollowed-out groove on its surface, and the surface of the rubber sleeve is provided with a cuttable outer sleeve.

[0009] The outer jacket, as the outermost protective structure of the cable, has the characteristics of being cut and recoverable. It provides the cable with wear-resistant, weather-resistant, and corrosion-resistant external protection, and can be precisely cut at a preset position to expose the internal rubber sleeve and shielding structure, providing operating space for disassembly. After cutting, it can be quickly restored through the sealing structure to restore the complete protective performance.

[0010] As a preferred embodiment of the present invention, the surface of the insulating sleeve is coated with an adhesive layer, which can adhere and fix the insulating sleeve to the elastic layer.

[0011] The adhesive layer enables high-strength bonding between the insulation sleeve and the elastic layer, preventing problems such as interlayer separation, voids, and displacement during long-term bending and movement of the cable, ensuring the stability of the internal buffer structure. At the same time, the bonding interface is tight and seamless, preventing moisture and humidity from penetrating along the interlayer gaps and improving the overall sealing performance of the cable.

[0012] As a preferred embodiment of the present invention, the protective layer includes a thermoplastic polyurethane film sleeved on the surface of the elastic layer, the outer surface of the thermoplastic polyurethane film is wrapped with a nylon cloth layer, and the outer surface of the nylon cloth layer is in sliding contact with the inner surface of the shielding structure.

[0013] The nylon fabric layer has an extremely low coefficient of friction, forming a dynamic sliding interface with the inner surface of the shielding structure. There is no adhesion or jamming between the two. When the shielding structure is subjected to axial tensile force, it can move smoothly along the surface of the nylon fabric layer with low resistance, completely solving the problems of high peeling resistance, easy tearing, and easy damage to internal cables of traditional shielding layers, and realizing the shielding structure can be removed without damage and quickly.

[0014] As a preferred embodiment of the present invention, the elastic layer is made of polyurethane foam, and the density of the elastic layer is 40-80 kg / m³.

[0015] Within this density range, the elastic layer can achieve a balance between buffering performance and structural strength: when the density is below 40 kg / m³, the sponge structure is too loose, the mechanical support is insufficient, and the cable is prone to collapse and interlayer misalignment when bending; when the density is above 80 kg / m³, the sponge hardness increases, the flexibility decreases, the cable bending resistance increases, and it cannot meet the requirements for small radius bending; the density range of 40-80 kg / m³ can be adapted to most of the application scenarios of flexible shielded cables, taking into account buffering, flexibility and durability.

[0016] As a preferred embodiment of the present invention, the outer sleeve comprises a PVC film wrapped around the surface of the rubber sleeve, the surface of the PVC film being provided with a protective coating, the protective coating being formed by applying and drying a protective coating material.

[0017] As a preferred embodiment of the present invention, the surface of the outer jacket is cut off, the surface of the outer jacket is wrapped with insulating tape located outside the cut, and the surface of the outer jacket is fitted with a sealing structure that wraps around the insulating tape.

[0018] The sealing structure is a modular, detachable sealing component pre-installed on the cable surface. It does not affect the normal laying and use of the cable. After the shielding structure is disassembled and the insulating tape is reset, the sealing structure can quickly cover the break area, forming multiple sealing protections and restoring the complete protective performance of the cable's outer layer.

[0019] As a preferred embodiment of the present invention, the sealing structure includes a sealing tube fitted onto the outer surface of the outer sleeve, the break being located inside the sealing tube, and several connecting blocks being fixedly connected around both ends of the sealing tube. A conical block is fixedly connected to the end of each connecting block away from the sealing tube. The connecting blocks, conical blocks, and sealing tube are integrally formed and the connecting blocks are elastic. The surface of the sealing tube is threaded, and extrusion tubes are threadedly connected to both sides of the surface of the sealing tube, which are wrapped around the outer surface of the outer sleeve. The inner surface of the extrusion tube is inclined, and the connecting blocks and conical blocks are located inside the extrusion tube. The inner surface of the extrusion tube is in contact with the outer surface of the conical block.

[0020] The inclined surfaces fit tightly together, preventing slippage and displacement under stress, ensuring uniform radial contraction of the connecting block, firmly clamping the outer sleeve surface, and achieving mechanical locking and sealing between the sealing tube and the outer sleeve.

[0021] As a preferred embodiment of the present invention, a sealing layer is provided at the outer end of the extrusion tube and the part in contact with the outer sleeve. The sealing layer is a solid structure formed by drying the sealant after being exposed to ultraviolet light. A raw material tape located between the two extrusion tubes is wrapped around the surface of the sealing tube, and the edges of the raw material tape are respectively wrapped around the surface of the extrusion tube.

[0022] The raw material tape covers the connection gap between the sealing tube and the extruded tube, and the edge extends to wrap around the extruded tube, forming a secondary sealing barrier. This further enhances the waterproof, moisture-proof, and dustproof performance of the sealing structure. The synergistic effect of the multiple sealing structures can meet the sealing and protection needs of harsh environments such as outdoor, humid, dusty, and corrosive environments.

[0023] As a preferred embodiment of the present invention, the sealing layer fills the annular gap between the extrusion tube and the outer sleeve, and the number of PTFE tape wrapping layers is greater than 2;

[0024] The perforated slots are arranged at equal intervals along the axial direction of the rubber sleeve, with a spacing of 50mm–150mm and a slot width of 2mm–5mm.

[0025] As a preferred embodiment of the present invention, the thermoplastic polyurethane film is coated by a heat bonding process at a bonding temperature of 180℃–220℃; the outer wall of the extrusion tube is provided with an anti-slip knurled texture.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. This invention integrates external protection, precise cutting, and easy internal removal by setting a cutable outer jacket, a rubber sleeve with hollowed-out slots, and a sliding contact between the protective layer and the shielding structure. The cutable outer jacket provides a positioning and restoration basis for operation, the hollowed-out slots of the rubber sleeve provide a precise path for the tool to penetrate and cut through the shielding structure, and the sliding contact between the nylon cloth layer on the surface of the protective layer and the inner surface of the shielding structure ensures that the shielding layer can be removed as a whole with low resistance after being divided. This significantly improves the controllability and convenience of disassembling the cable shielding structure, enabling the cable to meet the wiring requirements of partial unshielding in complex electromagnetic environments, and has high adaptability, maintainability, and operational reliability.

[0028] Whether it's temporary testing at an industrial site, segmented shielding switching, or partial replacement of the shielding layer for later maintenance, the operation can be completed quickly without replacing the entire cable. This significantly reduces construction difficulty and maintenance costs, broadens the application scope of flexible shielded cables in special scenarios such as high-end equipment, precision testing, and complex electromagnetic environments, and promotes the upgrading of flexible shielded cable technology towards intelligence, modularity, and maintainability.

[0029] 2. In the outer casing, the invention provides basic protection through a PVC film and a protective coating. The pre-set cut on its surface provides a starting point for the cutting operation, while the insulating tape pre-wrapped around the cut facilitates subsequent connection and sealing. In the operation intervention section, the hollowed-out grooves on the surface of the rubber sleeve provide a precise guiding channel for the horizontal penetration of the blade, ensuring that the internal shielding structure can be directly separated. In the interface and separation section, the protective layer is composed of a thermoplastic polyurethane film and a nylon cloth layer. The outer surface of the nylon cloth layer forms a sliding contact with the inner surface of the shielding structure, which greatly reduces the frictional resistance during peeling. These three parts work together to achieve rapid and accurate positioning and disassembly of the shielding structure and convenient restoration after operation, forming a complete support for the detachable function.

[0030] From outer layer opening and middle layer guidance to inner layer separation, the entire process is seamless and free of redundancy. Each structure has a clear division of labor and works in perfect harmony to form a closed-loop, detachable functional system. This ensures that the entire process of shielding structure disassembly is controllable, non-destructive, and efficient. After disassembly, the protective performance is quickly restored, achieving the goal of "one-time installation, multiple disassemblies, and long-term use".

[0031] 3. The elastic layer of this invention uses polyurethane foam of a specific density, providing good cushioning and elasticity, making the cable easy to bend. The hollowed-out grooves on the rubber sheath further increase the cable's flexibility and help reduce weight. At the same time, the outer sheath can be cut off, allowing for on-site cutting and end sealing according to actual needs, adapting to different wiring requirements. For the cut-off end of the outer sheath, a precise mechanical sealing structure is designed. By tightening the extrusion tubes on both sides, their inclined inner surfaces will squeeze and tighten the connecting block with conical blocks, thereby pressing the sealing tube radially and axially to achieve a strong physical seal. In addition, the addition of PTFE tape and UV-cured sealing layer forms a multi-layer sealing barrier, effectively preventing moisture and dust, ensuring the long-term reliability of the cable end in complex environments. This sealing structure is detachable, facilitating later maintenance or rewiring.

[0032] The triple sealing design of mechanical seal + adhesive layer seal + PTFE tape seal comprehensively blocks external corrosion, and the protection level meets the requirements of IP67 and above. The detachable structure supports multiple inspections and resealing, making maintenance convenient, greatly extending the service life of the cable and reducing the total life cycle cost.

[0033] Coating instructions

[0034] Figure 1 This is a schematic diagram of the structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the unfolded structure of the present invention;

[0036] Figure 3 This is a schematic diagram of the main structure of the present invention;

[0037] Figure 4 This is a partial structural diagram of the present invention;

[0038] Figure 5 This is a detailed structural diagram of the present invention;

[0039] Figure 6 This is a schematic diagram of the separation structure of the present invention.

[0040] In the diagram: 1. Battery cell; 2. Insulating sleeve; 3. Elastic layer; 4. Protective layer; 5. Shielding structure; 6. Rubber sleeve; 7. Hollowed-out groove; 8. Outer jacket; 9. Adhesive layer; 10. Thermoplastic polyurethane film; 11. Nylon cloth layer; 12. PVC film; 13. Protective coating; 14. Break; 15. Insulating tape; 16. Sealing tube; 17. Connecting block; 18. Conical block; 19. Extruded tube; 20. Sealing layer; 21. PTFE tape. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the coating method in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] like Figures 1 to 6 As shown, this invention provides a flexible shielded cable with a detachable shielding structure 5. This cable is used in wiring in complex electromagnetic environments to achieve precise partial disassembly and removal of the shielding structure 5 to meet the functional requirements of unshielded sections, and allows for easy restoration of basic protection after operation. The cable as a whole consists of three parts from the inside out: a conductive core 1, an insulation and buffer combination, a detachable shielding unit, and an external cutable protective sleeve. The layers work together through bonding, sleeve installation, and sliding cooperation. The interlayer connection method is reasonable. The adhesive layer ensures the stability of the internal structure, the sliding cooperation layer enables the shielding layer to be disassembled, and the sleeve structure ensures convenient assembly. The multi-layer structure performs its respective function and supports each other, forming an integrated cable product that combines flexibility, shielding, detachability, and protection.

[0043] The conductive core 1 is the central conductor of the cable. Insulation and buffering are combined and wrapped around the conductive core 1. The innermost layer is an insulating sleeve 2 that tightly wraps around the conductive core 1. The outer surface of the insulating sleeve 2 is coated with an adhesive layer 9. An elastic layer 3 is laminated outside the adhesive layer 9. The elastic layer 3 is made of porous elastic material foamed to provide radial buffering for the cable. A protective layer 4 covers the outer surface of the elastic layer 3. The protective layer 4 consists of an inner thermoplastic polyurethane film 10 and an outer nylon fabric layer 11. The thermoplastic polyurethane film 10 is fixed to the surface of the elastic layer 3 by heat fusion, while the nylon fabric layer 11 is tightly attached to the outer surface of the thermoplastic polyurethane film 10 by wrapping. The outer surface of the nylon fabric layer 11 is smooth, forming a low-friction contact interface with the inner components.

[0044] The wrapping overlap rate is controlled at over 50% to ensure full surface coverage. The smooth surface has a friction coefficient of less than 0.1, resulting in minimal sliding resistance when used with the shielding structure, allowing for easy removal of the shielding layer.

[0045] A detachable shielding unit, fitted over the protective layer 4, is a core functional component. The main body of this unit is a tubular shielding structure 5, which is tightly but not fixedly fitted onto the surface of the nylon fabric layer 11 of the protective layer 4, forming a sliding contact fit. This allows the shielding structure 5 to move relatively low-resistance relative to the protective layer 4 under axial force. An elastic rubber sleeve 6 is fitted over the shielding structure 5. The rubber sleeve 6 has a certain wall thickness and elasticity, and its outer surface has one or more axially spaced perforated slots 7 that penetrate the wall thickness of the rubber sleeve 6, providing a precise guiding channel for cutting tools to penetrate the interior.

[0046] The groove width is 2-5mm, which is compatible with the blade size of conventional cutting tools. The groove position is preset according to standard intervals such as 50mm and 100mm. Customized groove positions can also be made according to customer needs. The groove edge is smooth and burr-free to avoid scratching the shielding structure.

[0047] An external severable protective sleeve is wrapped around the outermost layer to provide basic environmental protection and serve as an operational positioning reference. This protective sleeve includes a PVC film 12 as a base, which is directly wrapped around the surface of the rubber sleeve 6. The outer surface of the PVC film 12 is coated with a protective coating 13, which is formed by the curing of a polymer protective coating, giving the outer sleeve 8 abrasion and weather resistance. In cable sections where shielding disassembly is required, annular breaks 14 are pre-processed on the surfaces of the PVC film 12 and the protective coating 13, with the breaks reaching the depth of the PVC film 12 layer. Insulating tape 15 is pre-wound around the breaks 14, covering the breaks 14 and the areas on both sides, maintaining the structural continuity and protective integrity of the outer sleeve 8 when no operation is being performed.

[0048] The insulating tape 15 has 3-5 layers, which are tightly wrapped without gaps. This effectively prevents dust and moisture from entering the break and ensures the structural integrity of the cable during manufacturing, transportation, and laying.

[0049] The cable manufacturing process is as follows: First, an insulating sleeve 2 is extruded and wrapped around the conductive core 1, and an adhesive is coated on its outer surface to form an adhesive layer 9; then, a foamed tubular elastic layer 3 is fitted onto the adhesive layer 9 and fixed by the adhesive layer 9; subsequently, a thermoplastic polyurethane film 10 is wrapped around the elastic layer 3 and a nylon cloth layer 11 is wound around it to form a protective layer 4; then, the overall tubular shielding structure 5 is fitted over the protective layer 4; next, a rubber sleeve 6 with a perforated groove 7 is fitted over the shielding structure 5; finally, a PVC film 12 is wound around the rubber sleeve 6, a protective coating 13 is coated to form an outer jacket 8, and a break 14 is made at a predetermined position and an insulating tape 15 is wrapped around it to complete the cable assembly.

[0050] The entire production process is automated, ensuring controllable quality and high consistency. Before leaving the factory, the products undergo comprehensive testing for electrical, mechanical, and sealing performance, and are only delivered for use after passing the tests.

[0051] This invention provides a flexible shielded cable with a detachable shielding structure 5. This cable is used in special wiring situations where local unshielded sections are required in complex electromagnetic environments. Through its unique detachable outer shielding layer structure, it allows field operators to accurately and conveniently remove the electromagnetic shielding function of a designated section and reliably restore the external protective integrity of the cable after the operation, thereby taking into account both the overall shielding effectiveness and the need for flexible local wiring.

[0052] Compared to traditional shielded cables, this cable breaks through the technical bottlenecks of non-disassembly of the shielding structure, easy damage after disassembly, and difficulty in restoration. It achieves functional upgrades of "controllable shielding, convenient disassembly, and recoverable protection" and can be widely used in high-end fields with extremely high requirements for electromagnetic compatibility, mechanical flexibility, and on-site maintenance.

[0053] The cable adopts a multi-layered composite structure from the inside out, mainly including a conductive core, a buffer protection layer, a removable shielding layer, and an outer reversible sheath system. Each layer works collaboratively through specific adhesive, sliding contact, and mechanical coupling relationships to achieve the cable's basic transmission performance, physical protection performance, and the core's removable shielding function.

[0054] The multi-layer composite structure design follows the principle of "flexible inside and rigid outside, stable inside and flexible outside". The inner layer ensures stable transmission and buffer protection, the middle layer realizes shielding function and can be disassembled, and the outer layer provides protection and sealing restoration. The interlayer coordination is scientific and the overall performance is optimal.

[0055] The conductive core consists of an internal battery cell 1 and its direct insulating layer. The battery cell 1 is a conductive metal conductor, which can be configured as a single strand or multi-strand strand as needed. The surface of the battery cell 1 is tightly covered with an insulating sleeve 2, which is made of polyethylene or cross-linked polyethylene material through an extrusion process, providing basic electrical insulation. The outer surface of the insulating sleeve 2 is coated with an adhesive layer 9, which is a hot melt adhesive or a specific chemical adhesive, used to achieve a strong bond with subsequent layers.

[0056] Hot melt adhesive bonding is simple and has a fast curing speed, making it suitable for automated production; chemical adhesives have high bonding strength and are resistant to aging, making them suitable for long-term use in harsh environments, and can be flexibly selected according to the cable application scenario.

[0057] The buffer protective layer 4 is directly constructed on the outside of the insulating sleeve 2, and is composed of an elastic layer 3 and a protective layer 4. The elastic layer 3 is tightly attached to the adhesive layer 9. Its material is polyurethane foam with an open-cell structure, which gives the layer excellent compression resilience and low density characteristics. It can effectively absorb external stress and vibration, and significantly improve the overall flexibility and bending of the cable. The outer surface of the elastic layer 3 is completely covered by the protective layer 4. The protective layer 4 is a double-layer composite film structure: the inner layer is a thermoplastic polyurethane film 10, which is tightly wrapped around the surface of the elastic layer 3 through a heat-bonding process, providing a high-strength and wear-resistant first barrier; the outer layer is a nylon cloth layer 11, which is fixed to the outer surface of the thermoplastic polyurethane film 10 by weaving or covering. The outer surface of the nylon cloth layer 11 is smooth, and it has a sliding contact relationship with the inner surface of the outermost shielding structure 5. This low-friction interface is the key to achieving low-resistance removal of the shielding layer later.

[0058] The nylon fabric layer 11 has a high weave density and a smooth surface, and there is no friction or jamming between it and the shielding structure 5. The pull-out force is ≤5N, and the operator can easily disassemble the shielding layer by hand.

[0059] The detachable shielding layer, fitted over the protective layer 4, is the core of this invention's functionality. The shielding structure 5 is typically a metal braided mesh or aluminum-plastic composite tape wrapping structure, providing the primary electromagnetic shielding effectiveness. A rubber sleeve 6, made of neoprene or silicone rubber, is fitted over the outer sleeve 8 of the shielding structure 5, possessing good elasticity and environmental resistance. One or more continuous perforated slots 7 are axially oriented on the surface of the rubber sleeve 6, penetrating its wall thickness, providing a precise cutting guide for the operating tool. The outermost outer sleeve 8 then covers the entire outer surface of the rubber sleeve 6.

[0060] The external recoverable sheath system serves as the operational carrier, consisting of an outer sheath 8 and its associated sealing structure. The outer sheath 8 comprises a PVC film 12 wound and bonded to the surface of a rubber sleeve 6. The outer surface of the PVC film 12 is coated with a protective coating 13, which can be polyurethane or acrylic paint, forming a wear-resistant and weather-resistant protective film after drying. At a predetermined operational position, the surface of the outer sheath 8 is pre-cut to form a break 14, and insulating tape 15 is pre-wound around the outside of the break 14. This design provides a basis for subsequent precise cutting positioning and initial recovery. To permanently seal the break 14, the system also includes a precision mechanical seal structure. This structure includes a sealing tube 16 fitted over the break 14 of the outer sheath 8. The sealing tube 16 is made of a tough engineering plastic, with an inner diameter slightly larger than the outer diameter of the outer sheath 8. Multiple connecting blocks 17 evenly distributed circumferentially are fixedly connected to the inner walls of both ends of the sealing tube 16. Each connecting block 17 has an inwardly extending conical block 18 at its end. The connecting blocks 17, conical blocks 18, and sealing tube 16 are integrally injection molded, and the connecting blocks 17 themselves possess a certain degree of elasticity. Threads are machined at both ends of the outer wall of the sealing tube 16, and an extrusion tube 19 is screwed onto each end. The inner hole of the extrusion tube 19 is a conical hole, with its larger end facing outward and its smaller end facing inward. When the extrusion tube 19 is tightened, its conical inner wall presses against the conical block 18, forcing the connecting block 17 to deform radially inward, thereby clamping the outer sleeve 8. To further ensure a seal, the annular area where the end of the extrusion tube 19 contacts the outer sleeve 8 is filled with ultraviolet-cured sealant, which forms a solid sealing layer 20 after irradiation. Furthermore, PTFE tape 21 is wrapped around the outer wall of the sealing tube 16 in the area between the two extrusion tubes 19 to enhance the overall moisture-proof sealing effect.

[0061] The PTFE tape 21 is tightly wrapped without wrinkles and fits seamlessly with the sealing tube 16 and the extrusion tube 19, forming a secondary waterproof barrier. The multiple sealing structures work together to achieve a protection level of IP68, making it suitable for extreme and harsh environments such as underwater, humid, and dusty conditions.

[0062] The cable assembly process follows an inside-out sequence: First, an insulating sleeve 2 is extruded and formed outside the core 1, and an adhesive layer 9 is coated on its surface; then, an elastic layer 3 of polyurethane sponge material is wrapped and bonded; subsequently, a thermoplastic polyurethane film 10 and a nylon cloth layer 11 are sequentially laminated outside the elastic layer 3 to form a protective layer 4; then, a metal shielding structure 5 is woven or wrapped around the protective layer 4; next, a rubber sleeve 6 with a perforated groove 7 is stretched and fitted over the shielding structure 5; then, a PVC film 12 is wrapped around the rubber sleeve 6 to form the outer jacket 8 base layer, and a protective coating 13 is applied; finally, the outer jacket 8 is cut at a predetermined position to form a break 14, insulating tape 15 is wrapped around it, and sealing components such as sealing tube 16 and extrusion tube 19 are pre-installed on the cable, but not tightened, to complete the overall assembly.

[0063] The pre-installed sealing components do not affect the normal laying of cables and can be used directly when disassembling without additional installation, thus improving on-site operation efficiency.

[0064] The procedure for disassembling the shielding structure 5 on-site is as follows: First, identify the section of the cable that requires partial unshielding, which corresponds to the pre-set break 14 position on the outer sleeve 8. During the operation, first remove the pre-wrapped insulating tape 15 at the break 14 to expose it. Secure the cable on both sides of the break 14, and then use the perforated groove 7 on the surface of the rubber sleeve 6 as a precise guide to cut laterally with the cutting tool. The tool will penetrate the rubber sleeve 6 and further cut the internal shielding structure 5, ensuring that the shielding layer is completely separated at this section. After cutting, the separated section of shielding structure 5 that needs to be removed can be pulled out from one end of the cable or directly from the cutting point. Since the shielding structure 5 and the nylon cloth layer 11 of the inner protective layer 4 are in sliding contact, and the rubber sleeve 6 is elastic, the resistance during this extraction process is very small. After the disassembly operation is completed, the sealing is restored: First, the reserved insulating tape 15 is tightly wrapped again around the break 14 to initially connect and insulate it; then, the loosely fitted sealing tube 16 is slid to the area of ​​the insulating tape 15 so that it completely covers the break 14; then, the extrusion tubes 19 at both ends of the sealing tube 16 are tightened simultaneously. The extrusion tube 19 moves inward, and its conical inner wall squeezes the conical block 18, forcing the elastic connecting block 17 to tighten radially, thereby firmly clamping it onto the outer jacket 8 on both sides of the break 14 to achieve mechanical locking and primary sealing; then, ultraviolet curing sealant is applied to the contact gap between the end of the extrusion tube 19 and the outer jacket 8, and a solid sealing layer 20 is formed by irradiation with an ultraviolet lamp; finally, PTFE tape 21 is wrapped around the sealing tube 16 to form multiple sealing protection, thereby restoring the continuity and sealing of the cable outer sheath.

[0065] After multiple sealing is completed, the outer layer of the cable is restored to its factory condition, with no decrease in protective performance, insulation performance, or mechanical properties, and can be used safely for a long time.

[0066] This cable is suitable for applications such as communication base stations, medical equipment, and precision instrument testing, where wiring is required in complex electromagnetic environments, and specific segments must avoid shielding interference or facilitate access to unshielded interfaces. Its key feature is that it transforms the shielding removal process from a difficult-to-control "peeling" to a standardized process of precise positioning and low-resistance "extraction." Through pre-designed break points 14, guide slots, and modular sealing structures, it achieves ease of on-site operation, reliability of results, and recoverability of end protection. All components are manufactured using conventional polymer materials and mature processing techniques (such as extrusion, braiding, injection molding, and coating), ensuring cost control and applicability to various engineering fields requiring highly adaptable electromagnetic compatibility wiring.

[0067] This cable utilizes a cutable and reversible outer jacket 8, a middle elastic rubber sleeve 6 with precise guiding grooves, and an inner low-friction sliding contact interface to achieve rapid and precise positioning and disassembly of the internal shielding structure 5, as well as convenient restoration after operation. In complex cabling scenarios requiring partial unshielding, operators can remove the shielding layer and restore the basic protection without special tools, significantly improving the cable's functional adaptability, field maintainability, and operational reliability. All components are manufactured using conventional cable materials and processes, resulting in a simple structure suitable for mass production. After operation, if inspection is required, the insulating tape 15 can be untied again to observe the internal condition; if necessary, new insulating tape 15 can be replaced for sealing.

[0068] It can be repeatedly inspected and sealed, and supports multiple disassembly and restoration, further improving the maintainability and service life of the cable.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible shielded cable with a detachable shielding structure, comprising a battery core (1). Its features are: The surface of the wire core is covered with an insulating sleeve (2), the outer surface of the insulating sleeve (2) is provided with an elastic layer (3), the surface of the elastic layer (3) is provided with a protective layer (4), the surface of the protective layer (4) is covered with a shielding structure (5), the surface of the shielding structure (5) is covered with a rubber sleeve (6), the rubber sleeve (6) is elastic and has a hollowed-out groove (7) on its surface, and the surface of the rubber sleeve (6) is covered with a cut-off outer sleeve (8).

2. The flexible shielded cable with a detachable shielding structure according to claim 1, characterized in that: The surface of the insulating sleeve (2) is coated with an adhesive layer (9), which can stick and fix the insulating sleeve (2) to the elastic layer (3).

3. A flexible shielded cable with a detachable shielding structure according to claim 2, characterized in that: The protective layer (4) includes a thermoplastic polyurethane film (10) sleeved on the surface of the elastic layer (3), and a nylon cloth layer (11) is wrapped around the outer surface of the thermoplastic polyurethane film (10). The outer surface of the nylon cloth layer (11) is in sliding contact with the inner surface of the shielding structure (5). The nylon fabric layer (11) adopts a high-density plain weave structure with a surface friction coefficient of less than 0.1, which enables the axial pull-out force of the shielding structure (5) to be less than 5N.

4. A flexible shielded cable with a detachable shielding structure according to claim 3, characterized in that: The elastic layer (3) is made of polyurethane foam and has a density of 40-80 kg / m³.

5. A flexible shielded cable with a detachable shielding structure according to claim 3, characterized in that: The outer sleeve (8) includes a PVC film (12) wrapped around the surface of the rubber sleeve (6), and the surface of the PVC film (12) is provided with a protective coating (13), which is formed by applying and drying a protective coating. The protective coating (13) is a polyurethane weather-resistant coating with a thickness ranging from 0.05 to 0.1 mm.

6. A flexible shielded cable with a detachable shielding structure according to claim 5, characterized in that: The outer jacket (8) has a cut (14) on its surface, and an insulating tape (15) is wrapped around the cut (14) on its surface. The outer jacket (8) is fitted with a sealing structure that wraps around the insulating tape (15).

7. A flexible shielded cable with a detachable shielding structure according to claim 6, characterized in that: The sealing structure includes a sealing tube (16) fitted onto the surface of the outer sleeve (8). The break (14) is located inside the sealing tube (16). Both ends of the sealing tube (16) are fixedly connected with several connecting blocks (17). The end of the connecting block (17) away from the sealing tube (16) is fixedly connected with a conical block (18). The connecting block (17), the conical block (18) and the sealing tube (16) are integrally formed and the connecting block (17) is elastic. The surface of the sealing tube (16) is threaded. Both sides of the surface of the sealing tube (16) are threadedly connected with a compression tube (19) that surrounds the surface of the outer sleeve (8). The inner surface of the compression tube (19) is set to be inclined. The connecting block (17) and the conical block (18) are both located inside the compression tube (19). The inner surface of the compression tube (19) is in contact with the outer surface of the conical block (18).

8. A flexible shielded cable with a detachable shielding structure according to claim 7, characterized in that: A sealing layer (20) is provided at the outer end of the extrusion tube (19) and the part in contact with the outer sleeve (8). The sealing layer (20) is a solid structure formed by drying the sealant after being exposed to ultraviolet light. The surface of the sealing tube (16) is wrapped with a raw material tape (21) located between the two extrusion tubes (19). The edges of the raw material tape (21) are wrapped around the surface of the extrusion tube (19).

9. A flexible shielded cable with a detachable shielding structure according to claim 8, characterized in that: The sealing layer (20) fills the annular gap between the extrusion tube (19) and the outer jacket (8), and the raw material tape (21) is wound in more than 2 layers; The hollowed-out slots (7) are arranged at equal intervals along the axial direction of the rubber sleeve (6), with a spacing of 50mm–150mm and a slot width of 2mm–5mm.

10. A flexible shielded cable with a detachable shielding structure according to claim 8, characterized in that: The thermoplastic polyurethane film (10) is coated by a heat bonding process at a temperature of 180℃–220℃; the outer wall of the extrusion tube (19) is provided with an anti-slip knurled texture.

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