High-flexibility tensile photoelectric hybrid cable and preparation method thereof

Abstract

The application belongs to the field of photoelectric transmission cables, and specifically discloses a high-softness tensile photoelectric hybrid cable and a preparation method thereof. The high-softness tensile photoelectric hybrid cable comprises a cable unit, an optical cable unit, and an outer sheath covering the cable unit and the optical cable unit; the cable unit comprises a conductor and an insulating layer covering the conductor; the conductor comprises an inner layer metal stranded body and an outer layer metal stranded body, and the outer layer metal stranded body covers the outer layer of the inner layer metal stranded body; the conductor further comprises aramid yarn, which is filled in the stranded gap of the inner layer metal stranded body and is fixed between the inner layer metal stranded body and the outer layer metal stranded body by the outer layer metal stranded body. Through the structural design, the problem of the decrease of tensile strength caused by the loosening of aramid yarn during cable stripping is avoided, and an independent hard central reinforcing member does not need to be additionally arranged, and the overall bending flexibility of the cable is significantly improved.

Description

Technical Field

[0001] This application belongs to the field of optoelectronic transmission cables, and more specifically, relates to a highly flexible tensile-resistant optoelectronic hybrid cable and its preparation method. Background Technology

[0002] Hybrid fiber optic cables, capable of simultaneously transmitting optical and electrical signals and combining power supply and communication functions, are widely used in communication network construction, security monitoring systems, and structured cabling. To ensure that the optical fiber is not broken by tensile, bending, or other external forces in complex construction environments and during long-term use, existing hybrid fiber optic cables generally require specialized reinforcing elements to guarantee their mechanical reliability.

[0003] In related technologies, hybrid fiber optic cables mainly employ two reinforcement structure schemes. The first is a center-reinforced structure, typically using phosphated steel wire or fiber-reinforced polymer (FRP) as the central reinforcement. This scheme effectively meets the tensile strength requirements of the cable, but due to the high hardness of the reinforcement itself, the overall bending performance of the cable is poor, with the minimum dynamic bending radius usually not less than 25 times the cable's outer diameter. In scenarios such as internal building wiring, pipe bends, and confined spaces, it is difficult to lay the cable with small-radius bends, limiting its application flexibility. The second is an outer-wound aramid yarn structure, which improves tensile strength by wrapping an aramid yarn layer around the outer layer of the cable core. This scheme improves the cable's flexibility to some extent, but its production process requires additional specialized equipment such as aramid yarn laying frames, increasing process complexity and manufacturing costs. Furthermore, during cable stripping operations on the construction site, the aramid yarn is prone to loosening; improper operation and uneven stress can lead to a local tensile strength decrease of more than 30%, making it difficult to consistently meet the engineering requirements for mechanical performance.

[0004] In summary, existing fiber optic hybrid cable reinforcement structures cannot simultaneously meet the requirements for tensile strength and bending flexibility, and therefore cannot fully adapt to the actual needs of complex construction scenarios. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this application provides a highly flexible tensile-strength optoelectronic hybrid cable and its preparation method, aiming to solve the problem that existing optoelectronic hybrid cable reinforcement structures cannot simultaneously meet the requirements of tensile strength and bending flexibility.

[0006] This application provides a high-flexibility, tensile-resistant hybrid optical-electric cable, specifically comprising a cable unit, an optical cable unit, and an outer sheath covering the cable unit and the optical cable unit; the cable unit includes a conductor and an insulating layer covering the conductor; the conductor includes an inner metal strand and an outer metal strand, the outer metal strand covering the outer part of the inner metal strand; the conductor also includes aramid yarn, the aramid yarn filling the stranding gaps of the inner metal strand and being fixed between the inner and outer metal strands by the outer metal strand.

[0007] Compared with the prior art, the above-described technical solution conceived in this application achieves the following advantages: Since the aramid yarn is filled in the twisting gaps of the inner metal strand and fixed between the inner and outer metal strands by the outer metal strand, the aramid yarn is embedded and locked between the two metal strands, avoiding the problem of reduced tensile strength due to loose aramid yarn during cable stripping, thus ensuring stable tensile performance. Using the inner and outer metal strands as conductor structures eliminates the need for additional independent rigid central reinforcement, significantly improving the overall bending flexibility of the cable and enabling it to adapt to laying requirements in confined spaces and complex bending paths. Furthermore, the filling of the aramid yarn and the twisting of the inner metal strand are completed simultaneously, eliminating the need for additional dedicated aramid yarn laying equipment, simplifying the production process and reducing manufacturing costs.

[0008] As a further preferred embodiment, both the inner metal strand and the outer metal strand are formed by concentrically twisting multiple soft copper monofilaments.

[0009] As a further preferred embodiment, the twisting direction of the outer metal strand is opposite to the twisting direction of the inner metal strand.

[0010] As a further preferred embodiment, the aramid yarn filling the twisting gap has a filling rate of 80%-90%.

[0011] As a further preferred embodiment, the cable unit and the optical cable unit are arranged side by side, and the cable unit, the optical cable unit and the outer sheath are filled with filler rope.

[0012] As a further preferred embodiment, the filling rope is a mesh polypropylene filling rope or a polyethylene circular filling rope.

[0013] As a further preferred embodiment, the optical cable unit includes an optical fiber and a protective layer covering the outside of the optical fiber.

[0014] As a further preferred embodiment, the outer sheath is any one of a high-density polyethylene sheath, a low-smoke halogen-free flame-retardant polyolefin sheath, or a thermoplastic polyurethane sheath.

[0015] This application also provides a method for preparing the above-mentioned high-flexibility tensile-strength hybrid optical-electric cable, comprising the following steps: S1: The inner metal strand is twisted together, and aramid yarn is simultaneously filled into the twisting gap during the twisting process; S2: The outer metal strand is twisted and disposed outside the inner metal strand and the aramid yarn to obtain a conductor; S3: An insulation layer is extruded on the outside of the conductor to form a cable unit; S4: The cable unit and the optical cable unit are arranged side by side, and the outer sheath is extruded to complete the preparation of the optoelectronic hybrid cable.

[0016] As a further preferred embodiment, when the aramid yarn is filled into the twisting gap of the inner metal strand, the unwinding tension is 0.5N-1.5N.

[0017] In summary, compared with the prior art, the technical solutions conceived in this application have the following main technical advantages: 1. In this application, aramid yarn is filled into the twisting gap of the inner metal strand and fixed between the inner and outer metal strands by the outer metal strand, so that the aramid yarn is embedded and locked between the inner and outer metal strands. This avoids the problem of the aramid yarn loosening during cable stripping and causing a decrease in tensile strength, thus making the tensile performance of the optoelectronic hybrid cable stable. Moreover, the filling rate of aramid yarn is 80%-90%, which not only ensures sufficient tensile strength, but also avoids poor electrical contact or twisting difficulties between copper wires due to overfilling.

[0018] 2. This application employs an inner and outer metal stranded core as the conductor structure, both of which are formed by concentrically stranding multiple soft copper monofilaments. This eliminates the need for an additional, independent rigid central reinforcement, significantly improving the overall bending flexibility of the cable. Furthermore, by setting the stranding direction of the outer metal stranded core opposite to that of the inner metal stranded core, the internal stress of the conductor can be balanced, preventing torsional deformation during stranding and further enhancing the structural stability of the cable.

[0019] 3. In this application, the filling of aramid yarn and the stranding of the inner metal strand are completed simultaneously, eliminating the need for additional dedicated aramid yarn feeding equipment, simplifying the production process and reducing manufacturing costs. Simultaneously, by arranging the cable unit and optical cable unit side-by-side and filling the space between them and the outer sheath with mesh polypropylene filler rope or polyethylene circular filler rope, the cable core position can be effectively fixed, improving the cable's roundness and compressive strength. The outer sheath uses high-density polyethylene, low-smoke halogen-free flame-retardant polyolefin, or thermoplastic polyurethane sheaths, allowing for flexible selection based on different application scenarios to meet diverse requirements such as flame retardancy, weather resistance, and flexibility. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the cross-sectional structure of the optoelectronic hybrid cable provided in the embodiments of this application.

[0021] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein: 1. Cable unit; 11. Conductor; 111. Inner metal strand; 1111. Soft copper monofilament; 112. Outer metal strand; 113. Aramid yarn; 12. Insulation layer; 2. Optical cable unit; 21. Optical fiber; 22. Protective layer; 3. Outer sheath; 4. Filler rope. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] Reference Figure 1 This application discloses a highly flexible, tensile-resistant hybrid optical-electric cable, which includes a cable unit 1, an optical cable unit 2, and an outer sheath 3. The outer sheath 3 covers the outside of the cable unit 1 and the optical cable unit 2, and provides overall mechanical protection and environmental protection for the internal units.

[0024] In this embodiment, two cable units 1 and one optical fiber unit 2 are provided. The two cable units 1 and one optical fiber unit 2 are arranged side by side, and a filler rope 4 is used to fill the gaps between the cable units 1 and the optical fiber unit 2 and the outer sheath 3. The filler rope 4 is used to fix the position of the cable core and improve the roundness and compressive strength of the cable. Optionally, the filler rope 4 is a mesh polypropylene (PP) filler rope or a polyethylene (PE) circular filler rope.

[0025] Specifically, cable unit 1 includes a conductor 11 and an insulation layer 12 covering the conductor 11. The conductor 11 includes an inner metal strand 111, aramid yarn 113, and an outer metal strand 112. The aramid yarn 113 fills the stranding gaps of the inner metal strand 111, with a filling rate of 80%-90%. The outer metal strand 112 covers the outer surface of the inner metal strand 111 and fixes the aramid yarn 113 between the inner metal strand 111 and the outer metal strand 112.

[0026] By embedding aramid yarn 113 inside the soft copper stranded conductor 11 of cable unit 1, rather than placing it as an independent reinforcing component in the center or outer layer of the optoelectronic hybrid cable core, this application fundamentally solves the contradiction between "tensile strength" and "flexibility" in the prior art. On the one hand, the design of aramid yarn 113 filling the gaps between copper wires does not require changing the insulation outer diameter of cable unit 1, does not affect subsequent cabling processes, and can flexibly match the tensile strength requirements of different projects by adjusting the number and specifications of aramid yarn 113, making its adaptability far superior to traditional solutions. On the other hand, the improved overall flexibility of the cable allows it to directly adapt to complex scenarios such as pre-buried pipes in buildings and corner bends, without the need for additional bending tools; at the same time, the internally embedded aramid yarn 113 will not unravel during cable stripping, avoiding safety hazards and performance loss during construction. In addition, this application achieves performance upgrades without increasing equipment investment, reducing the overall production cost by more than 12% compared to the traditional outer-ring aramid yarn 113 solution, and the improved construction efficiency further reduces the overall project cost.

[0027] More specifically, both the inner metal strand 111 and the outer metal strand 112 are formed by concentrically twisting multiple soft copper monofilaments 1111, which are either Category 5 or Category 6 soft copper monofilaments. To balance the internal stress of the conductor 11, the twisting direction of the outer metal strand 112 is opposite to that of the inner metal strand 111. For example, the twisting direction of the inner metal strand 111 can adopt a three-layer alternating design of "left-right-left", and the twisting direction of the outer metal strand 112 can correspondingly adopt a three-layer alternating design of "right-left-right".

[0028] Furthermore, the optical cable unit 2 includes an optical fiber 21 and a protective layer 22 covering the outside of the optical fiber 21. The outer sheath 3 can be flexibly selected according to the actual application scenario, such as any one of high-density polyethylene (HDPE) sheath, low-smoke halogen-free flame-retardant polyolefin (LSZH) sheath or thermoplastic polyurethane (TPU) sheath, to meet diverse requirements such as flame retardancy, weather resistance, and flexibility.

[0029] This application also discloses a method for preparing a highly flexible and tensile-resistant hybrid optical-electric cable, which includes the following steps: S1: Twisting the inner metal strand 111, and simultaneously filling the aramid yarn 113 into the twisting gap of the inner metal strand 111 during the twisting process.

[0030] The conductor 11 is prepared using a dynamic tension-controlled concentric stranding process. Aramid yarn 113 is uniformly mixed with soft copper monofilament 1111, filling the gaps between the soft copper monofilament 1111. Step S1 completes two sub-steps: inner layer stranding and aramid filling. During inner layer stranding, type 5 or type 6 soft copper monofilament 1111 is selected as the conductor 11 material. Six to twelve soft copper monofilaments 1111 are concentrically stranded at a pitch ratio of 8 to 12 times the cable diameter to form the inner layer strand. The stranding speed is controlled at 50-100 m / min, and the stranding direction is "left-handed," forming the initial conductor 11 skeleton structure. During aramid filling, aramid yarn 113 is simultaneously fed into the gaps between the soft copper monofilament 1111 through a dual-channel device during the inner layer stranding process. The specifications and number of aramid yarns 113 are determined according to the target tensile strength requirements; this embodiment does not impose specific limitations. A servo motor is used to independently control the unwinding tension of the aramid yarn 113, dynamically matching it with the twisting tension of the soft copper monofilament 1111. The unwinding tension of the aramid yarn 113 is controlled between 0.5N and 1.5N to ensure uniform stress during twisting, preventing excessive stretching or slack. Through this tension control, the aramid yarn 113 is evenly filled to 80%-90% of the gap between the soft copper monofilament 1111, ensuring sufficient tensile strength while avoiding poor electrical contact or twisting difficulties caused by overfilling. This aramid filling process utilizes the inherent gaps between the soft copper monofilament 1111 for precise filling, eliminating the need for additional aramid yarn 113 winding equipment. Compared to existing outer-ring winding aramid yarn 113 solutions, this simplifies equipment configuration and process flow.

[0031] S2: The outer metal strand 112 is stranded and disposed outside the inner metal strand 111 and the aramid yarn 113 to obtain the conductor 11.

[0032] Step S2 completes the outer layer stranding sub-step in conductor 11 preparation. After the inner layer stranding and aramid filling are completed, 12-18 soft copper monofilaments 1111 are stranded outside the inner layer stranded body at a pitch ratio of 6-10 times the cable diameter to form the outer layer stranded body. The stranding speed of the outer layer stranding is also controlled at 50-100 m / min, and the stranding direction is the opposite of the inner layer, "right-hand" direction, to achieve reverse stranding. The purpose of reverse stranding is: on the one hand, to lock the aramid yarn 113 between the inner and outer layer stranded bodies, preventing the aramid yarn 113 from loosening in subsequent processes or construction; on the other hand, to balance the torsional stress inside the conductor 11 through the reverse stranding of the inner and outer layers, avoiding deformation during stranding and improving the structural stability of the conductor 11. Through the above three sub-steps of inner layer stranding, synchronous aramid filling, and outer layer stranding, the conductor 11 of cable unit 1 is obtained. In the conductor 11, the aramid yarn 113 is firmly fixed between the inner strand and the outer strand, forming a sandwich composite structure of "soft copper monofilament 1111-aramid yarn 113-soft copper monofilament 1111".

[0033] S3: An insulation layer 12 is extruded onto the outside of the conductor 11 to form a cable unit 1. The conductor 11 of the cable unit 1 obtained above is fed to an extrusion device, where an insulation layer 12 is extruded onto its outside. The insulation material is polyethylene (PE) or cross-linked polyethylene (XLPE), and the extrusion temperature is controlled at 150℃-180℃. This temperature range is 20℃-30℃ lower than that of traditional extrusion processes. The purpose is to: avoid thermal degradation of the aramid yarn 113 caused by high temperature, thereby ensuring that the long-term mechanical properties of the aramid yarn 113 are not affected; and at the same time ensure that the insulation layer 12 is tightly bonded to the conductor 11 to form a complete cable unit 1.

[0034] S4: The prepared cable unit 1 and optical cable unit 2 are arranged side by side. The optical cable unit 2 includes an optical fiber 21 and a protective layer 22 covering the optical fiber 21, and can adopt a conventional optical cable structure in the art. The cable unit 1 and optical cable unit 2 are arranged in a fixed structure to form a cable, specifically, two cable units 1 and one optical cable unit 2 are arranged side by side. During the cabling process, filler rope 4 is filled between the cable unit 1, optical cable unit 2, and the subsequently extruded outer sheath 3. The filler rope 4 is a mesh polypropylene filler rope 4 or a polyethylene circular filler rope 4. The function of the filler rope 4 is to fix the relative position of each unit in the cable core, improve the roundness of the cable, and enhance the compressive strength of the cable. The cable core after cabling is transported to the extrusion equipment, and the outer sheath 3 is extruded onto its exterior. The material of the outer sheath 3 is selected according to the application requirements, specifically, any one of high-density polyethylene (HDPE) sheath, low-smoke halogen-free flame-retardant polyolefin (LSZH) sheath, or thermoplastic polyurethane (TPU) sheath. After extrusion, a high-flexibility, tensile-strength hybrid optical and electrical cable is obtained.

[0035] The high-flexibility tensile-strength hybrid optical-electric cable of this application has the following effects: First, significantly improved flexibility. The cable unit 1, composed of aramid yarn 113 and soft copper monofilament 1111 twisted together, maintains good flexibility. The minimum bending radius of the hybrid optical-electric cable can be reduced to 5 times the cable diameter, which is 80% higher than that of hybrid cables with phosphated steel wire or FRP reinforcement in the center, greatly reducing the construction difficulty in narrow spaces and bends. Under the premise of meeting the preset tensile strength standard, the bending radius is reduced by more than 80% compared with hybrid cables with phosphated steel wire or FRP reinforcement in the center. Second, stable and reliable tensile performance. The aramid yarn 113 is evenly distributed inside the conductor 11. When under stress, the stress can be evenly transmitted to the entire cable unit 1 through the copper wire, and then synchronously transmitted to the optical cable unit 2. The tensile strength is on par with the traditional solution, and the aramid yarn 113 will not unravel when the cable is stripped, avoiding the problem of uneven local stress. Third, reduced production and construction costs. No new aramid yarn laying rack or other equipment is needed; existing production lines can be used directly, reducing production process complexity by 20%-30%. During construction, no additional handling of loose aramid yarn 113 is required, shortening the cable laying time by approximately 15%. Fourth, electrical performance remains unaffected. Aramid yarn 113 is a non-metallic material; when twisted with copper wire, it does not alter the conductivity of conductor 11, and the DC resistance and other indicators of cable unit 1 fully meet standard requirements.

[0036] Furthermore, compared with the two mainstream reinforcement structure schemes in the prior art (i.e., the scheme with phosphated steel wire or FRP reinforcement in the center, and the scheme with aramid yarn 113 wrapped around the outer ring), the high-flexibility tensile-strength hybrid optical cable of this application has the following beneficial effects: The bending performance is significantly improved. The first solution in the prior art (with a phosphated steel wire or FRP reinforcement in the center) uses phosphated steel wire or FRP as a rigid reinforcement, resulting in a minimum bending radius as high as 25 times the cable diameter, making it difficult to bend and lay in confined spaces and at bends. The second solution in the prior art (with aramid yarn 113 wrapped around the outer ring) reduces the minimum bending radius to 8 times the cable diameter, but the aramid yarn 113 is prone to unraveling. This application, by filling and locking the aramid yarn 113 between the inner metal strand 111 and the outer metal strand 112, further reduces the minimum bending radius to 5 times the cable diameter, an improvement of 80% compared to the first solution and 37.5% compared to the second solution. This allows for flexible bending during construction, fully adapting to the laying needs of complex scenarios such as building wiring and pipe bends.

[0037] The tensile strength is stable and reliable. While the first method in the prior art (with a phosphated steel wire or FRP reinforcement in the center) meets the tensile strength requirements, its bending performance is poor. The second method (with aramid yarn 113 wrapped around the outer ring) is prone to unraveling after cable stripping, leading to uneven stress and unstable tensile strength. In this application, the aramid yarn 113 is uniformly filled and locked inside the conductor 11. After cable stripping, the aramid yarn 113 will not unravel, resulting in good stress uniformity and stable tensile strength that meets standard requirements. This avoids the defect of the second method where improper operation can cause a local tensile strength decrease of more than 30%.

[0038] Production and construction costs are reduced. The second solution in the prior art (outer ring wound aramid yarn 113) requires additional specialized equipment such as aramid yarn pay-off frames, increasing process complexity and equipment investment; during construction, attention must be paid to the problem of aramid yarn 113 unraveling, affecting laying efficiency. This application integrates the filling of aramid yarn 113 into the twisting process of the inner metal strand 111, eliminating the need for additional specialized equipment and allowing direct use of existing production lines; during construction, there is no need for additional handling of loose aramid yarn 113, making operation convenient, and the overall production cost and construction efficiency are superior to the prior art solutions.

[0039] It should be understood that expressions such as "comprising" and "may include" as used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "comprising" and / or "having" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but should not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0040] It should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A highly flexible, tensile-resistant hybrid optical and electrical cable, characterized in that, The cable unit includes a cable unit (1), an optical fiber unit (2), and an outer sheath (3) covering the cable unit (1) and the optical fiber unit (2). The cable unit (1) includes a conductor (11) and an insulation layer (12) covering the conductor (11). The conductor (11) includes an inner metal strand (111) and an outer metal strand (112), with the outer metal strand (112) covering the outer metal strand (111). The conductor (11) also includes aramid yarn (113), which fills the twisting gap of the inner metal strand (111) and is fixed between the inner metal strand (111) and the outer metal strand (112) by the outer metal strand (112).

2. The high-flexibility tensile-strength hybrid optical-electric cable as described in claim 1, characterized in that, Both the inner metal strand (111) and the outer metal strand (112) are formed by concentrically twisting multiple soft copper monofilaments (1111).

3. The high-flexibility tensile-strength hybrid optical-electric cable as described in claim 1, characterized in that, The twisting direction of the outer metal strand (112) is opposite to the twisting direction of the inner metal strand (111).

4. The high-flexibility tensile-strength hybrid optical-electric cable as described in claim 1, characterized in that, The aramid yarn (113) fills 80%-90% of the twisting gap.

5. The high-flexibility tensile-strength hybrid optical-electric cable as described in claim 1, characterized in that, The cable unit (1) and the optical cable unit (2) are arranged side by side, and the cable unit (1), the optical cable unit (2) and the outer sheath (3) are filled with filler rope (4).

6. The high-flexibility tensile-strength hybrid optical-electric cable as described in claim 5, characterized in that, The filling rope (4) is a mesh polypropylene filling rope or a polyethylene circular filling rope.

7. The high-flexibility tensile-strength hybrid optical-electric cable as described in claim 1, characterized in that, The optical cable unit (2) includes an optical fiber (21) and a protective layer (22) covering the outside of the optical fiber (21).

8. The high-flexibility tensile-strength hybrid optical-electric cable as described in claim 1, characterized in that, The outer sheath (3) is any one of high-density polyethylene sheath, low-smoke halogen-free flame-retardant polyolefin sheath, or thermoplastic polyurethane sheath.

9. A method for preparing a high-flexibility tensile-strength hybrid optical-electric cable as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: Twisting the inner metal strand (111), and simultaneously filling the aramid yarn (113) into the twisting gap during the twisting process; S2: The outer metal strand (112) is stranded and disposed outside the inner metal strand (111) and the aramid yarn (113) to obtain the conductor (11). S3: A cable unit (1) is formed by extruding an insulation layer (12) on the outside of the conductor (11); S4: The cable unit (1) and the optical cable unit (2) are arranged side by side, and the outer sheath (3) is extruded to complete the preparation of the optoelectronic hybrid cable.

10. The preparation method according to claim 9, characterized in that, In step S1, when the aramid yarn (113) is filled into the twisting gap of the inner metal strand (111), the unwinding tension is 0.5N-1.5N.

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