A dual unit photoelectric composite cable

Abstract

This utility model relates to the field of cable technology and discloses a dual-unit optoelectronic composite cable, including a sheath layer. An electrical unit mechanism is disposed on the right side inside the sheath layer for transmitting electrical signals. A tensile-resistant mechanism is disposed inside the sheath layer to improve the tensile strength of the entire composite cable. The electrical unit mechanism includes two sets of copper stranded wires, each set of which is fixedly connected to an insulation layer. A butterfly-shaped optical cable assembly is disposed on the left side inside the sheath layer. In this utility model, electrical signals are transmitted through two sets of copper stranded wires, the insulation layer prevents leakage interference, and the colored optical fiber in the butterfly-shaped optical cable assembly transmits optical signals. Tensile steel wires bear external forces. The electrical unit and the butterfly-shaped optical cable are arranged separately and side-by-side, achieving synchronous and stable transmission of electrical and optical signals. This avoids the electrical unit heating up and affecting the optical fiber performance, and improves the tensile strength of the composite cable, meeting the needs of optoelectronic composite transmission in complex environments.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a dual-unit optoelectronic composite cable. Background Technology

[0002] Optical-optical composite cable is a composite cable that integrates optical transmission units and electrical transmission units. Its core feature is that it integrates the optical fiber responsible for optical signal transmission and the copper stranded wire responsible for electrical signal or power transmission into the same cable body, forming an integrated cable with both optical and electrical transmission functions. This design can complete optical communication and power supply in the same line, reduce wiring complexity, improve space utilization, meet the needs of high-speed data transmission, and provide power support. It has the advantages of high integration, convenient construction, and strong system reliability.

[0003] A search revealed Chinese patent publication number CN219591149U, which discloses an optoelectronic composite cable comprising: an outer sheath layer, an armor layer, a filling layer, optical units, and electrical units; the outer sheath layer is fitted onto the armor layer, the armor layer having a polygonal cross-section, and the outer sheath layer is adapted to the armor layer; the optical units and the electrical units are both disposed inside the armor layer; the filling layer fills the gap between the optical units and the electrical units. In this optoelectronic composite cable, the optical units and electrical units are located within the polygonal armor layer, and the outer sheath layer... The outer sheath and armor layer are matched. The outer sheath and armor layer can effectively buffer external impacts and prevent the optical and electrical units inside the armor layer from squeezing each other. The filler layer is used to fill the gap between the optical and electrical units. The overall structure can effectively ensure the stability of the optical-electrical composite cable structure. However, the heat generated by the conductor cable during operation is easy to accumulate in the limited space inside the armor layer where multiple optical and electrical units are mixed. This causes the temperature inside the protective sheath to rise rapidly. The butterfly cable will be in a high-temperature environment for a long time, which will aggravate fiber loss, affect transmission power, and lead to a decrease in the quality of optical signal transmission. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a dual-unit optical-electric composite cable, which aims to improve the problem in the prior art where multiple mixed optical units and electrical units are arranged in a limited space inside the armor layer, and the heat generated by the conductor cable during operation is easily accumulated, causing the temperature inside the protective sheath to rise rapidly and affecting the transmission power.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a dual-unit optoelectronic composite cable, comprising a sheath layer, wherein an electrical unit mechanism is provided on the right side inside the sheath layer for transmitting electrical signals, and an anti-tensile mechanism is provided inside the sheath layer for improving the tensile strength of the entire composite cable;

[0006] The electrical unit structure includes two sets of copper stranded wires, both sets of copper stranded wires are fixedly connected to an insulation layer, and a butterfly-shaped optical cable assembly is provided on the left side inside the sheath layer.

[0007] The above technical solution transmits electrical signals through two sets of copper stranded wires, with insulation layers isolating electrical contact. The symmetrical design of the two wires achieves stable electrical signal transmission and reduces signal interference and current leakage.

[0008] As a further description of the above technical solution:

[0009] The tensile structure includes a PE protective layer, which is fixedly connected to the inner and outer sides of the sheath layer. A low-smoke halogen-free material layer is fixedly connected to the inner side of the PE protective layer. Metal braided armor is provided on both the upper and lower sides of the low-smoke halogen-free material layer. A composite tensile layer is provided inside the low-smoke halogen-free material layer. A heat insulation layer is fixedly connected to the bottom of the low-smoke halogen-free material layer.

[0010] The above technical solution transmits optical signals through two colored optical fibers in the butterfly-shaped optical cable assembly, and is symmetrically protected by two tensile steel wires to avoid deformation of the optical fibers under stress, effectively protecting the performance of the optical fibers, meeting the requirements of high-speed data transmission, and improving the communication stability of the composite cable.

[0011] As a further description of the above technical solution:

[0012] The butterfly-shaped optical cable assembly includes two colored optical fibers and two tensile steel wires. The two colored optical fibers are fixedly connected to the inside left side of the sheath layer, and the two tensile steel wires are fixedly connected to the left and right sides of the two colored optical fibers, respectively.

[0013] The above technical solution buffers external impacts with a PE protective layer and provides flame-retardant support with a low-smoke halogen-free material layer, forming a basic protective structure that enhances the environmental adaptability of the composite cable, extends its service life, and ensures safe use.

[0014] As a further description of the above technical solution:

[0015] The metal braided armor includes multiple longitudinal flat steel wires and multiple transverse flat steel wires. All of the longitudinal and transverse flat steel wires are braided and are respectively fixedly connected to the top and bottom of the low-smoke halogen-free material layer.

[0016] The above technical solution utilizes longitudinal flat steel wires in the metal braided armor to bear longitudinal tension, while transverse flat steel wires disperse transverse pressure. The braided structure works together to prevent local stress concentration, thereby improving the overall tensile and compressive strength and adapting to complex stress environments.

[0017] As a further description of the above technical solution:

[0018] The composite tensile layer comprises multiple aramid fibers and multiple conductive metal wires, all of which are designed in a mesh pattern and are fixedly connected inside the low-smoke halogen-free material layer.

[0019] The above technical solution utilizes aramid fibers in the composite tensile layer to assist in bearing tensile force, conductive metal wires to absorb stress energy and ground, and a mesh structure to disperse stress, reducing the impact of stress fluctuations and improving structural stability and safety.

[0020] As a further description of the above technical solution:

[0021] The cross-sectional area of ​​the two sets of copper stranded wires is set to 0.3-2mm², and both sets of copper stranded wires adopt a threaded winding design.

[0022] The above technical solution utilizes copper stranded wire 21 with a cross-sectional area of ​​0.3-2mm² and a spiral winding design to adapt to different transmission requirements and disperse stress, thereby optimizing the efficiency of electrical signal transmission, preventing conductor damage due to stress concentration, and improving conductivity and structural strength.

[0023] As a further description of the above technical solution:

[0024] Both colored optical fibers are of type G.657 or G.652D.

[0025] The above technical solution uses G.657 or G.652D colored optical fiber, which has good bending resistance and low loss characteristics, thus ensuring the quality of optical signal transmission, reducing transmission loss, and meeting the requirements of long-distance, high-speed optical communication.

[0026] As a further description of the above technical solution:

[0027] Both sets of copper stranded wires and insulation layers adopt a symmetrical design, and the butterfly-shaped optical cable assembly adopts a symmetrical design.

[0028] The above technical solutions ensure structural balance through the symmetrical layout of copper stranded wires and insulation layers, and improve the operational reliability of the composite cable through the symmetrical design of the butterfly-shaped optical cable assembly, making it suitable for various complex power consumption scenarios.

[0029] This utility model has the following beneficial effects:

[0030] 1. In this utility model, electrical signals are transmitted through two sets of copper stranded wires, the insulation layer prevents leakage and interference, and the colored optical fiber in the butterfly optical cable assembly transmits optical signals. The tensile steel wire bears external force, and the electrical unit and the butterfly optical cable are arranged separately and side by side, which realizes the effect of synchronous and stable transmission of electrical and optical signals, avoids the electrical unit heating affecting the optical fiber performance, and improves the tensile strength of the composite cable, meeting the needs of optoelectronic composite transmission in complex environments.

[0031] 2. In this utility model, the PE protective layer buffers external impacts, the low-smoke halogen-free material layer provides flame-retardant support, and the longitudinal and transverse flat steel wires of the metal braided armor respectively bear tension and disperse compression. The aramid and conductive metal wires of the composite tensile layer absorb stress, and the heat insulation layer blocks heat, thereby improving the tensile performance of the composite cable. This allows the composite cable to maintain structural integrity when subjected to large tensile forces, and avoids the heating of the electrical unit from affecting the tensile components. It is suitable for installation scenarios with frequent movement or complex stress. Attached Figure Description

[0032] Figure 1 This is a front view of a dual-unit optoelectronic composite cable proposed in this utility model;

[0033] Figure 2 This is a structural breakdown diagram of the tensile mechanism in a dual-unit optoelectronic composite cable proposed in this utility model;

[0034] Figure 3 This is a schematic diagram of the metal braided armor structure in a dual-unit optoelectronic composite cable proposed in this utility model;

[0035] Figure 4 This is a cross-sectional view of the rubber layer in a dual-unit optoelectronic composite cable proposed in this utility model;

[0036] Figure 5 This is a schematic diagram of the composite tensile layer in a dual-unit optoelectronic composite cable proposed in this utility model.

[0037] Legend:

[0038] 1. Sheath layer; 2. Electrical unit structure; 21. Copper stranded wire; 22. Insulation layer; 23. Butterfly-shaped optical cable assembly; 231. Colored optical fiber; 232. Tensile steel wire; 3. Tensile structure; 31. PE protective layer; 32. Low smoke halogen-free material layer; 33. Metal braided armor; 331. Longitudinal flat steel wire; 332. Transverse flat steel wire; 34. Composite tensile layer; 341. Aramid; 342. Conductive metal wire; 35. Thermal insulation layer. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Reference Figure 1 and Figure 2 The present invention provides an embodiment of a dual-unit optoelectronic composite cable, comprising a sheath layer 1, an electrical unit mechanism 2 disposed on the right side inside the sheath layer 1 for transmitting electrical signals, and a tensile strength mechanism 3 disposed inside the sheath layer 1 for improving the tensile strength of the entire composite cable.

[0041] The electrical unit mechanism 2 includes two sets of copper stranded wires 21. The outer side of each set of copper stranded wires 21 is fixedly connected with an insulation layer 22. A butterfly optical cable assembly 23 is provided on the left side inside the sheath layer 1. The butterfly optical cable assembly 23 includes two colored optical fibers 231 and two tensile steel wires 232. The two colored optical fibers 231 are fixedly connected to the left side inside the sheath layer 1, and the two tensile steel wires 232 are fixedly connected to the left and right sides of the two colored optical fibers 231 respectively.

[0042] Specifically, in the electrical unit mechanism 2, two sets of copper stranded wires 21 serve as carriers for electrical signal transmission, tightly wrapped with an insulation layer 22 to prevent current leakage and signal interference. The good conductivity of the copper stranded wires 21 ensures stable transmission of electrical signals, while the insulation layer 22 isolates the copper stranded wires 21 from electrical contact with the external environment and other components. Inside the sheath layer 1 on the left side, the butterfly optical cable assembly 23 is independently installed. Two colored optical fibers 231 are fixed inside the sheath layer 1, responsible for optical signal transmission. Their low-loss characteristics ensure stable long-distance transmission of optical signals. Two tensile steel wires 232 are respectively installed on the left and right sides of the colored optical fibers 231, directly bearing the load generated by external tension. When the composite cable is subjected to external force, the tensile steel wires 232, with their high strength, first resist the tension, preventing the colored optical fibers 231 from deforming due to force and affecting the quality of optical signal transmission. Simultaneously, the electrical unit mechanism 2 and the butterfly... The butterfly-shaped optical cable assembly 23 is arranged in a separated and parallel layout within the sheath layer 1. When the electrical unit mechanism 2 is working, the heat generated by the copper stranded wires 21 transmitting electrical signals is blocked by the insulation layer 22 and the sheath layer 1 and cannot be directly conducted to the butterfly-shaped optical cable assembly 23. The independent space design of the butterfly-shaped optical cable assembly 23 further avoids the impact of the heat generated by the copper stranded wires 21 on the optical fiber performance. Stable electrical signal transmission is achieved through two sets of copper stranded wires 21 and the insulation layer 22. The colored optical fiber 231 in the butterfly-shaped optical cable assembly 23 transmits optical signals, the tensile steel wire 232 bears the tensile force, and the separated and parallel arrangement of the electrical unit mechanism 2 and the butterfly-shaped optical cable assembly 23 within the sheath layer 1 achieves the effect of synchronous and stable transmission of electrical and optical signals, avoiding the impact of heat generated by the electrical unit on the optical fiber performance. At the same time, the tensile steel wire 232 is used to improve the overall tensile strength of the composite cable, meeting the needs of optoelectronic composite transmission in complex environments.

[0043] Reference Figures 2-5 The tensile structure 3 includes a PE protective layer 31, which is fixedly connected to the inner and outer sides of the sheath layer 1. A low-smoke halogen-free material layer 32 is fixedly connected to the inner side of the PE protective layer 31. Metal braided armor 33 is provided on both the upper and lower sides of the low-smoke halogen-free material layer 32. The metal braided armor 33 includes multiple longitudinal flat steel wires 331 and multiple transverse flat steel wires 332. Both the multiple longitudinal flat steel wires 331 and the multiple transverse flat steel wires 332 adopt a braided design. The horizontal flat steel wires 332 are fixedly connected to the top and bottom of the low smoke halogen-free material layer 32 respectively. The interior of the low smoke halogen-free material layer 32 is provided with a composite tensile layer 34, which includes multiple aramid fibers 341 and multiple conductive metal wires 342. The multiple aramid fibers 341 and multiple conductive metal wires 342 are all designed in a mesh shape. The multiple aramid fibers 341 and multiple conductive metal wires 342 are all fixedly connected to the interior of the low smoke halogen-free material layer 32. The bottom of the low smoke halogen-free material layer 32 is fixedly connected with a heat insulation layer 35.

[0044] Specifically, in the tensile structure 3, the PE protective layer 31 is fixedly connected to the inner and outer sides of the sheath layer 1, forming a basic protective structure. Its toughness can buffer external impacts. The low-smoke halogen-free material layer 32 inside the PE protective layer 31 has flame-retardant properties and provides support for the internal tensile components. The metal braided armor 33 on the upper and lower sides of the low-smoke halogen-free material layer 32 is woven from multiple longitudinal flat steel wires 331 and transverse flat steel wires 332. When the composite cable is subjected to longitudinal tension, the longitudinal flat steel wires 331 directly bear the tensile load; when subjected to transverse extrusion... During compression, the transverse flat steel wires 332 disperse pressure through a braided structure, avoiding localized stress concentration. The composite tensile layer 34 inside the low-smoke halogen-free material layer 32 adopts a mesh design, with multiple aramid fibers 341 interwoven with conductive metal wires 342. The high tensile strength of the aramid fibers 341 assists the metal braided armor 33 in bearing tensile force, while the conductive metal wires 342 absorb stress energy through deformation under stress, and also have a grounding and conductive function. The heat insulation layer 35 at the bottom of the low-smoke halogen-free material layer 32 blocks the heat generated by the electrical unit mechanism 2 during operation from reaching the tensile layer. Mechanism 3 conducts the stress, preventing the aramid fiber 341 from losing tensile strength due to high-temperature aging. When the composite cable is subjected to external tension, the longitudinal flat steel wires 331 of the metal braided armor 33 first resist the longitudinal tension, while the transverse flat steel wires 332 disperse the concentrated stress to the entire armor layer through the braided structure. The mesh structure of the aramid fiber 341 and conductive metal wires 342 in the composite tensile layer 34 further absorbs stress fluctuations and prevents local overload. The heat insulation layer 35 ensures that the tensile components operate at a suitable temperature and maintains stable material properties. The longitudinal flat steel wires 331 and transverse flat steel wires 332 braided structure bear tensile and compressive loads. The aramid 341 and conductive metal wires 342 mesh structure of the composite tensile layer 34 disperse stress. The PE protective layer 31 and the low smoke halogen-free material layer 32 provide support and protection. The heat insulation layer 35 blocks heat, thereby improving the tensile performance of the composite cable. This allows the composite cable to maintain structural integrity when subjected to large tensile forces, while avoiding the heating of electrical units from affecting the performance of the tensile components. It is suitable for complex installation scenarios that require frequent movement or external force.

[0045] Reference Figure 1 The cross-sectional area of ​​the two sets of copper stranded wires 21 is set to 0.3-2mm², and both sets of copper stranded wires 21 adopt a threaded winding design; both colored optical fibers 231 adopt G.657 or G.652D model; both sets of copper stranded wires 21 and insulation layer 22 adopt a symmetrical design, and the butterfly optical cable assembly 23 adopts a symmetrical design;

[0046] Specifically, the spiral winding design of the copper stranded wire 21 can disperse the stress generated during transmission through the spiral structure, avoiding local overload. The cross-sectional area of ​​0.3-2mm² is suitable for different electrical signal transmission requirements, ensuring stable conductivity. The symmetrical design makes the electrical unit mechanism 2 and the butterfly optical cable assembly 23 uniformly stressed within the sheath layer 1, reducing deformation errors caused by structural eccentricity. The colored optical fiber 231 of type G.657 or G.652D has good bending resistance and low loss characteristics, ensuring stable long-distance transmission of optical signals. By dispersing stress through the spiral winding and symmetrical design of the copper stranded wire 21, and ensuring optical transmission performance through the selection of the colored optical fiber 231, the effect of stable transmission of electrical and optical signals and uniform stress on the composite cable structure is achieved, improving the applicability and reliability of the composite cable in complex environments.

[0047] Working principle: The outermost sheath layer 1, made of high-strength material, provides mechanical protection and environmental isolation for the internal components. Inside, the electrical unit mechanism 2 is located on the right side, and the butterfly optical cable assembly 23 is located on the left side. These two are arranged side-by-side to avoid mutual interference. The electrical unit mechanism 2 contains two sets of copper stranded wires 21 with a cross-sectional area of ​​0.3-2 mm², which are spirally wound and wrapped with an insulation layer 22. The spiral wound structure disperses stress during transmission, and the symmetrical design keeps the center of gravity of the electrical unit mechanism 2 centered. The good conductivity of the copper stranded wires 21 ensures stable signal transmission, while the insulation layer 22 prevents current leakage and signal interference. The butterfly optical cable assembly 23 includes two components, selected from G.657 or G.The 652D model features a colored optical fiber 231 and two tensile steel wires 232. The low-loss characteristic of the colored optical fiber 231 ensures stable long-distance transmission of optical signals. The two tensile steel wires 232 are symmetrically arranged on both sides of the colored optical fiber 231. When the composite cable is subjected to external force, the tensile steel wires 232 bear the load first to protect the optical fiber. The butterfly-shaped optical cable assembly 23 is independently set up, and its separation layout with the electrical unit mechanism 2, combined with the sheath layer 1, blocks the heat generated by the copper stranded wires 21 when the electrical unit is working, thus avoiding affecting the performance of the optical fiber. The tensile mechanism 3 is located inside the sheath layer 1 and consists of a PE protective layer 31, a low-smoke halogen-free material layer 32, and a metal braid. The sheath layer 1 consists of a woven armor 33, a composite tensile layer 34, and a heat insulation layer 35. A PE protective layer 31 is fixed inside and outside the sheath layer 1, its toughness buffering external impacts and providing chemical corrosion protection. A low-smoke halogen-free material layer 32 is fixed inside the PE protective layer 31, possessing flame-retardant properties and providing support for the internal tensile components. A metal woven armor 33 is positioned above and below the low-smoke halogen-free material layer 32, woven from longitudinal flat steel wires 331 and transverse flat steel wires 332. The longitudinal flat steel wires 331 bear longitudinal tensile force, while the transverse flat steel wires 332 disperse transverse compressive pressure. The composite tensile layer 34 is located within the low-smoke halogen-free material layer. Inside layer 32, a mesh of aramid fiber 341 and conductive metal wire 342 is woven together. The aramid fiber 341 helps to withstand tensile force, while the conductive metal wire 342 absorbs stress energy and also serves as a grounding function. The heat insulation layer 35 is fixed to the bottom of the low-smoke halogen-free material layer 32, preventing the heat generated by the electrical unit mechanism 2 from being conducted to the tensile strength mechanism 3, thus avoiding high-temperature aging of the aramid fiber 341. When the composite cable is working, the electrical unit mechanism 2 transmits electrical signals through copper stranded wire 21, the insulation layer 22 ensures safety, the butterfly optical cable assembly 23 transmits optical signals through colored optical fiber 231, and the tensile steel wire 232 protects the optical fiber. The separate layout of the two realizes the separation of electrical and optical signals. Synchronous and stable transmission without interference: When the composite cable is subjected to external force, the longitudinal flat steel wires 331 and aramid fibers 341 in the tensile mechanism 3 bear the longitudinal tensile force, while the transverse flat steel wires 332 and conductive metal wires 342 disperse the transverse force. The tensile steel wires 232 of the butterfly-shaped optical cable assembly 23 synchronously protect the optical fiber. In terms of environmental adaptability, the low-smoke halogen-free material layer 32 is flame-retardant, the heat insulation layer 35 maintains the temperature stability of the tensile assembly, and the PE protective layer 31 resists external corrosion. Through the synergistic effect of its components, this composite cable achieves stable transmission of electrical and optical signals, improves tensile performance and environmental adaptability, and meets various stringent usage requirements.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-unit optoelectronic composite cable, comprising a sheath layer (1), characterized in that: An electrical unit mechanism (2) is provided on the right side inside the sheath layer (1). The electrical unit mechanism (2) is used to transmit electrical signals. An anti-tensile mechanism (3) is provided inside the sheath layer (1). The anti-tensile mechanism (3) is used to improve the tensile strength of the entire composite cable. The electrical unit mechanism (2) includes two sets of copper stranded wires (21), and an insulation layer (22) is fixedly connected to the outside of both sets of copper stranded wires (21). A butterfly optical cable assembly (23) is provided on the left side inside the sheath layer (1).

2. The dual-unit optical-electric composite cable according to claim 1, characterized in that: The tensile structure (3) includes a PE protective layer (31), which is fixedly connected to the inner and outer sides of the sheath layer (1). A low-smoke halogen-free material layer (32) is fixedly connected to the inner side of the PE protective layer (31). Metal braided armor (33) is provided on both the upper and lower sides of the low-smoke halogen-free material layer (32). A composite tensile layer (34) is provided inside the low-smoke halogen-free material layer (32). A heat insulation layer (35) is fixedly connected to the bottom of the low-smoke halogen-free material layer (32).

3. The dual-unit optical-electric composite cable according to claim 1, characterized in that: The butterfly-shaped optical cable assembly (23) includes two colored optical fibers (231) and two tensile steel wires (232). The two colored optical fibers (231) are fixedly connected to the inside left side of the sheath layer (1), and the two tensile steel wires (232) are fixedly connected to the left and right sides of the two colored optical fibers (231) respectively.

4. A dual-unit optoelectronic composite cable according to claim 2, characterized in that: The metal braided armor (33) includes multiple longitudinal flat steel wires (331) and multiple transverse flat steel wires (332). The multiple longitudinal flat steel wires (331) and multiple transverse flat steel wires (332) are all braided. The multiple longitudinal flat steel wires (331) and multiple transverse flat steel wires (332) are respectively fixedly connected to the top and bottom of the low smoke halogen-free material layer (32).

5. A dual-unit optoelectronic composite cable according to claim 2, characterized in that: The composite tensile layer (34) includes multiple aramid fibers (341) and multiple conductive metal wires (342). The multiple aramid fibers (341) and multiple conductive metal wires (342) are all designed in a mesh pattern. The multiple aramid fibers (341) and multiple conductive metal wires (342) are all fixedly connected inside the low smoke halogen-free material layer (32).

6. The dual-unit optical-electric composite cable according to claim 1, characterized in that: The cross-sectional area of ​​the two sets of copper stranded wires (21) is set to 0.3-2 mm², and both sets of copper stranded wires (21) adopt a threaded winding design.

7. A dual-unit optical-electric composite cable according to claim 3, characterized in that: Both of the colored optical fibers (231) are of type G.657 or G.652D.

8. A dual-unit optoelectronic composite cable according to claim 1, characterized in that: Both sets of copper stranded wires (21) and insulation layers (22) are symmetrically designed, and the butterfly optical cable assembly (23) is symmetrically designed.

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