Optical-electric composite cable

Abstract

This utility model relates to an optoelectronic composite cable, comprising a flame-retardant sheath, within which are arranged side-by-side optical units, copper conductors, a non-metallic reinforcing core, and high-strength yarn. The sheath has a circular structure and is made of low-smoke halogen-free flame-retardant polyolefin material. The optical unit includes G657A2 optical fiber and a tight-closing layer tightly wrapped around the optical fiber; the optical fiber operates at a temperature of -40℃ to 80℃. Two copper conductors are provided to provide power to the terminal equipment. The non-metallic reinforcing core enhances the bending resistance of the optoelectronic composite cable. The high-strength yarn enhances the tensile strength of the optoelectronic composite cable. This utility model's optoelectronic composite cable exhibits improved performance in tensile strength, bending resistance, and fire resistance, reducing the risk of signal interruption due to cable damage and lowering the cost of maintenance and replacement, thus improving the overall economic efficiency of the system. Its adaptability to various complex environments is significantly enhanced, ensuring the reliable operation of the communication system and better meeting the needs of modern communication network construction.

Description

Technical Field

[0001] This utility model relates to the field of optoelectronic hybrid optical cable technology, specifically an optoelectronic composite cable. Background Technology

[0002] An optical fiber cable is a communication line that uses optical fibers as its core transmission element and is encased in a protective sheath. It uses a certain number of optical fibers arranged in a specific way to form a cable core, enabling efficient transmission of optical signals.

[0003] Compared to traditional copper cables, optical fibers have greater transmission capacity, longer repeater distances, and are unaffected by electromagnetic interference. As a key transmission tool in the information society, they are widely used in long-distance trunk lines, urban relays, submarine communications, local area networks, and private networks. They are the core component of the physical routing of the Internet and are hailed as the cornerstone of the information superhighway.

[0004] Traditional optical cables have the following technical problems:

[0005] In low-temperature or high-temperature environments, optical fibers are prone to micro-bending due to material contraction or expansion, leading to increased optical signal transmission loss and affecting communication quality. Insufficient bending resistance and tensile strength make the fibers easily break or snap during construction. Poor fire resistance of the sheath material makes it prone to combustion in emergencies such as fires. The flat shape of the optical cable's structure makes it prone to twisting during deployment, causing fiber damage and signal transmission interruption. Furthermore, it can only transmit optical signals and cannot provide power to terminal equipment, requiring additional power cables, increasing wiring complexity and cost. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide an optical-electric composite cable with a wide operating temperature range, good bending resistance and tensile strength, excellent fire resistance, and less susceptibility to damage to optical fibers during the laying process. It can not only transmit optical signals, but also has the function of remote power supply.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An optical-electric composite cable includes a flame-retardant sheath, within which optical units, copper conductors, non-metallic reinforcing cores, and high-strength yarns are arranged side by side.

[0009] The sheath has a circular structure and is made of low-smoke, halogen-free, flame-retardant polyolefin material.

[0010] The optical unit includes G657A2 optical fiber and a tight-closing layer tightly wrapped around the optical fiber. The operating temperature of the optical fiber is -40℃ to 80℃.

[0011] Two copper conductors are provided to supply power to the terminal equipment;

[0012] Non-metallic reinforcing cores are used to enhance the bending resistance of optical-electric composite cables;

[0013] High-strength yarn is used to enhance the tensile strength of optical fiber composite cables.

[0014] Furthermore, the outer diameter of the tight-fitting layer is 0.95±0.02mm.

[0015] Furthermore, the attenuation coefficient of G657A2 optical fiber is ≤0.4dB / km at a wavelength of 1310nm and ≤0.3dB / km at a wavelength of 1550nm.

[0016] Furthermore, the copper conductor has a wire diameter of 0.59±0.01 mm and a resistivity of ≤0.01707 Ω·mm. 2 / m, elongation ≥20%.

[0017] Furthermore, the diameter of the non-metallic reinforcing core is 0.55±0.3mm.

[0018] Furthermore, the non-metallic reinforcing core is made of aramid fiber or glass fiber.

[0019] Furthermore, the high-strength yarn is either Kevlar yarn or polyester yarn.

[0020] In summary, this utility model has the following advantages:

[0021] 1. Significantly improved temperature adaptability

[0022] G657A2 optical fiber maintains stable performance over a wide temperature range (-40℃ to 80℃), avoiding micro-bending losses caused by temperature changes. This allows the optical-electric composite cable to operate normally in both the cold winters of the north and the hot summers of the south, greatly expanding its application scenarios and improving its reliability in harsh environments.

[0023] 2. Enhanced bending resistance

[0024] Introducing a non-metallic reinforcing core within the sheath significantly improves the bending resistance of the optical fiber composite cable. During construction, the cable will not easily break even under substantial bending stress, thus reducing potential damage to the optical fiber and extending its service life.

[0025] 3. Increased tensile strength

[0026] The addition of high-strength yarn significantly enhances the tensile strength of the optical fiber composite cable. During construction, the cable can withstand greater tension, preventing damage to the optical fiber due to stretching and ensuring smooth construction. It also improves the cable's stability in complex environments.

[0027] 4. Enhanced fire safety

[0028] The use of a flame-retardant sheath enables the fiber optic composite cable to meet the fire protection requirements for individual strands. In emergency situations such as fires, the fiber optic composite cable will not become a medium for the spread of fire, thereby improving its safety in special environments and meeting the stringent fire protection requirements of modern buildings and industrial sites.

[0029] 5. Optimization of deployment and construction performance

[0030] By improving the structure, the optical fiber composite cable was changed from a traditional flat shape to a circular shape, which solved the signal transmission problem caused by the optical fiber composite cable being easily twisted during cable laying, making the operation of construction personnel more convenient and improving construction efficiency.

[0031] 6. Integrated remote power supply function

[0032] Optical-electric composite cables not only transmit optical signals but also provide remote power, directly supplying power to devices such as optical modems. This feature reduces the need for additional power cables, simplifies the installation process, lowers construction costs, and also improves system integration and reliability. Attached Figure Description

[0033] Figure 1 This is a schematic cross-sectional view of the structure of this utility model.

[0034] In the picture:

[0035] 1-Fiber optic cable, 2-Sheath, 3-High-strength yarn, 4-Copper conductor, 5-Non-metallic reinforcing core. Detailed Implementation

[0036] The present invention will now be described in further detail.

[0037] like Figure 1 As shown, an optoelectronic composite cable includes a flame-retardant sheath 2, the color of which is preferably white or gray.

[0038] Inside the sheath 2, there are optical units, copper conductors 4, non-metallic reinforcing cores 5 and high-strength yarns arranged side by side;

[0039] The sheath 2 has a circular structure, which solves the signal transmission problem caused by the easy twisting of the optical fiber composite cable during cable laying. It facilitates the connection of the termination, reduces construction delays, facilitates the operation of construction personnel, and improves construction efficiency. The material is low-smoke halogen-free flame-retardant polyolefin material, which improves the fire resistance of the optical fiber composite cable in emergency situations such as fires, ensures the safety of the optical fiber composite cable, meets the fire protection requirements of single-strand flame retardancy, reduces the release of toxic fumes in fire scenarios, delays the spread of fire, and improves the safety of the use environment.

[0040] The optical unit includes a G657A2 optical fiber 1 and a tight-closing layer tightly wrapped around the optical fiber 1. The optical fiber 1 can operate stably in a wide temperature range of -40℃ to 80℃, effectively avoiding the micro-bending phenomenon of the optical fiber 1 caused by material shrinkage, ensuring that the additional loss does not increase, the optical signal transmission performance is stable, and meeting the communication needs in extreme temperature environments.

[0041] In this embodiment, the outer diameter of the tight cladding is 0.95±0.02mm. The G657A2 optical fiber has an attenuation coefficient of ≤0.4dB / km at a wavelength of 1310nm and an attenuation coefficient of ≤0.3dB / km at a wavelength of 1550nm. Combined with its ability to suppress micro-bending loss over a wide temperature range, it ensures low loss and high stability for long-distance optical signal transmission.

[0042] Two copper conductors 4 are provided to provide power to the terminal equipment.

[0043] In this embodiment, the diameter of the copper conductor 4 is 0.59±0.01mm, and the resistivity of the copper conductor 4 is ≤0.01707Ω·mm. 2 / m, with an elongation of ≥20%, ensures low resistance loss and mechanical ductility in power transmission, meeting the current stability requirements for remote power supply.

[0044] The addition of non-metallic reinforcing core 5 significantly improves the bending resistance of the optical fiber composite cable, reduces the risk of breakage due to bending and folding, and extends its service life. It is especially suitable for wiring scenarios in confined spaces or with frequent bending.

[0045] In this embodiment, the non-metallic reinforcing core 5 is made of aramid fiber or glass fiber. The diameter of the non-metallic reinforcing core 5 is 0.55±0.3mm.

[0046] The integrated design of high-strength yarn 3 enhances the overall tensile strength of the optical-electric composite cable, effectively resisting the pulling force during construction, preventing fiber 1 from being broken, and reducing construction losses and rework rate.

[0047] In this embodiment, the high-strength yarn 3 is Kevlar yarn or polyester yarn.

[0048] The lightweight design, which combines a non-metallic reinforcing core 5 with a high-strength yarn 3, reduces the overall weight of the optoelectronic composite cable.

[0049] This utility model's optical-electric composite cable boasts excellent compatibility and versatility. Its design considers compatibility with existing systems, allowing for direct use without large-scale modifications to existing equipment. Furthermore, its circular structure and optimized performance enable it to adapt to various construction environments and application scenarios. Due to improvements in tensile strength, bending resistance, and fire resistance, the failure rate during use is significantly reduced. This not only reduces the risk of signal interruption caused by cable damage but also lowers the cost of maintenance and replacement, improving the overall economic efficiency of the system. The cable's deployment and connection are also more convenient. Construction personnel can complete the laying and connection work more quickly, reducing construction time and labor costs, and improving construction efficiency. The optical-electric composite cable's adaptability to various complex environments is significantly enhanced, ensuring the reliable operation of communication systems and better meeting the needs of modern communication network construction.

[0050] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A fiber optic composite cable, characterized in that: Includes a flame-retardant sheath, inside which are arranged side by side optical units, copper conductors, non-metallic reinforcing cores and high-strength yarn; The sheath has a circular structure and is made of low-smoke, halogen-free, flame-retardant polyolefin material. The optical unit includes G657A2 optical fiber and a tight-closing layer tightly wrapped around the optical fiber. The operating temperature of the optical fiber is -40℃ to 80℃. Two copper conductors are provided to supply power to the terminal equipment; Non-metallic reinforcing cores are used to enhance the bending resistance of optical-electric composite cables; High-strength yarn is used to enhance the tensile strength of optical fiber composite cables.

2. The optoelectronic composite cable according to claim 1, characterized in that, The outer diameter of the tight-fitting layer is 0.95±0.02mm.

3. The optoelectronic composite cable according to claim 1, characterized in that, The attenuation coefficient of G657A2 optical fiber is ≤0.4dB / km at a wavelength of 1310nm and ≤0.3dB / km at a wavelength of 1550nm.

4. The optoelectronic composite cable according to claim 1, characterized in that, The copper conductor has a wire diameter of 0.59 ± 0.01 mm and a resistivity of ≤ 0.01707 Ω·mm. 2 / m, elongation ≥20%.

5. The optoelectronic composite cable according to claim 1, characterized in that, The diameter of the non-metallic reinforcing core is 0.55±0.3mm.

6. The optoelectronic composite cable according to claim 1, characterized in that, The non-metallic reinforcing core is made of aramid fiber or glass fiber.

7. The optoelectronic composite cable according to claim 1, characterized in that, High-strength yarn is either Kevlar yarn or polyester yarn.

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