Tensile bend-resistant optical cable

Abstract

The utility model discloses a kind of tensile bending-resistant optical cables, including central reinforcing member, optical fiber unit, sleeve, reinforcing layer, first triangular prism reinforcing core, weather-resistant layer and outer sheath;By covering the sleeve in the periphery of multiple optical fiber units, the sleeve is provided with multiple second triangular prism reinforcing core between multiple optical fiber units, each second triangular prism reinforcing core is set between two adjacent optical fiber units, the reinforcing layer is covered outside the sleeve, multiple first triangular prism reinforcing core is evenly arranged and set in reinforcing layer with circumferential interval, this structure can effectively enhance the tensile property and bending-resistant property of optical cable, prevent optical cable from breaking due to excessive pulling force in the process of construction arrangement, ensure the signal transmission quality of optical cable, bring convenience for production construction;Prevent optical cable from breaking due to stress concentration when wiring bending at sharp bend, make signal more stable, improve the quality of optical cable, prolong the service life of optical cable, make optical cable more competitive, meet existing demand.

Description

Technical Field

[0001] This utility model relates to the field of optical cable technology, and in particular to a tensile and bending resistant optical cable. Background Technology

[0002] Optical fiber cables are manufactured to meet optical, mechanical, or environmental performance specifications. They are communication cable assemblies that use one or more optical fibers encased in a protective sheath as the transmission medium and can be used individually or in groups. Optical fiber cables are mainly composed of optical fibers (glass filaments as thin as a hair), a plastic protective sheath, and a plastic outer sheath. They do not contain metals such as gold, silver, copper, or aluminum and generally have no recycling value. An optical fiber cable is a communication line that uses a certain number of optical fibers arranged in a specific way to form a cable core, encased in a sheath, and sometimes with an outer protective layer, to transmit optical signals. With the advent of the information age, the amount of information transmitted has exploded. As an effective means of high-capacity, long-distance transmission, optical fiber cables have been widely and extensively used, and their application has gradually expanded from long-distance trunk lines to metropolitan area networks and access networks.

[0003] Optical fiber cable installation methods mainly fall into three categories: overhead laying, ground laying, and underground laying. When laying optical fibers overhead, the current tensile strength of optical fibers is relatively poor. During installation, excessive pulling force can easily cause the fiber to break, affecting signal transmission quality and causing inconvenience to production and construction. Furthermore, when laying cables at sharp bends, it is usually necessary to bend the fiber to change its direction of extension; however, the poor bending resistance of optical fibers makes them prone to stress concentration and breakage, resulting in complete signal interruption. The poor quality and short service life of these cables make them less competitive and unable to meet current needs. Therefore, it is necessary to research a new technical solution to improve existing optical fibers. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a tensile and bending resistant optical cable. This cable can effectively solve the problems of existing optical cables, such as poor tensile strength, easy breakage due to excessive pulling force during construction and laying, affecting signal transmission quality and causing inconvenience to production and construction, poor bending resistance, easy breakage due to stress concentration at sharp bends, resulting in complete signal interruption, poor quality, short service life, and lack of competitiveness.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A tensile and bending resistant optical cable includes a central strengthening member, optical fiber units, a sheath, a strengthening layer, first triangular prism strengthening cores, a weather-resistant layer, and an outer sheath. Multiple optical fiber units are evenly twisted around the central strengthening member. Each optical fiber unit includes a butterfly-shaped sheath, an optical fiber, a shielding layer, a waterproof layer, and multiple steel wires. The butterfly-shaped sheath has two side wings. The optical fiber is located at the center of the butterfly-shaped sheath. The shielding layer covers the optical fiber, and the waterproof layer covers the shielding layer. The multiple steel wires are symmetrically arranged in the two side wings. The sheath covers the periphery of the multiple optical fiber units. Multiple second triangular prism strengthening cores are disposed between the sheath and the multiple optical fiber units, with each second triangular prism strengthening core disposed between two adjacent optical fiber units. The strengthening layer covers the outside of the sheath. Multiple first triangular prism strengthening cores are evenly arranged circumferentially within the strengthening layer. The weather-resistant layer covers the outside of the strengthening layer. The outer sheath covers the outside of the weather-resistant layer.

[0007] As a preferred embodiment, the central reinforcing member is made of aramid fiber, which has the characteristics of high strength, high modulus, and light weight. It also has good high temperature resistance, flame retardancy, and chemical corrosion resistance, and is safe and environmentally friendly.

[0008] As a preferred embodiment, the shielding layer is a metal braided layer, which has good flexibility, high load-bearing capacity, and excellent tensile strength, electromagnetic shielding performance, corrosion resistance, and flame retardant properties.

[0009] As a preferred embodiment, the waterproof layer is made of polyurethane, which has good waterproof performance, wear resistance, weather resistance, corrosion resistance and aging resistance, and high strength and elasticity.

[0010] As a preferred embodiment, there are six steel wires, with three wires arranged in a triangular pattern in the corresponding side wing, which helps to enhance the strength of the butterfly sheath and improve the quality of the optical cable.

[0011] As a preferred embodiment, the sleeve is made of PA, PE or LSZH material.

[0012] As a preferred option, the weather-resistant layer is made of ASA material, which has good weather resistance, chemical corrosion resistance, wear resistance, flame retardancy and aging resistance, and is environmentally friendly and safe.

[0013] As a preferred option, the outer sheath is made of LSZH material, which is a low-smoke halogen-free material with good flame retardant and high-temperature resistance properties, and is environmentally friendly and safe.

[0014] As a preferred embodiment, water-blocking cable grease is filled between the sleeve and the multiple optical fiber units, and the multiple second triangular prism reinforcing cores are disposed in the water-blocking cable grease, which can effectively enhance the waterproof performance of the optical cable.

[0015] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0016] By uniformly twisting multiple optical fiber units around a central reinforcing member, and then covering the periphery of the multiple optical fiber units with a sheath, a plurality of second triangular prism reinforcing cores are disposed between the sheath and the multiple optical fiber units. Each second triangular prism reinforcing core is disposed between two adjacent optical fiber units. The reinforcing layer is covered outside the sheath, and multiple first triangular prism reinforcing cores are evenly distributed circumferentially within the reinforcing layer. This structure effectively increases the strength of the optical cable, enhances its tensile and bending resistance, prevents the optical cable from breaking due to excessive tension during construction, ensures the signal transmission quality of the optical cable, and facilitates production and construction. It also prevents the optical cable from breaking due to stress concentration when bending at sharp bends, making the signal more stable, improving the quality of the optical cable, extending its service life, making the optical cable more competitive, and meeting current needs.

[0017] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of a preferred embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional view of the optical fiber unit in a preferred embodiment of the present invention.

[0020] Explanation of reference numerals in the attached diagram:

[0021] 10. Central reinforcement component; 20. Fiber optic unit

[0022] 21. Butterfly-shaped sheath; 211. Side wings.

[0023] 22. Optical fiber 23. Shielding layer

[0024] 24. Waterproof layer 25. Steel wire

[0025] 30, sleeve 40, reinforcing layer

[0026] 50. First triangular prism reinforcing core; 60. Weather-resistant layer

[0027] 70. Outer sheath; 80. Second triangular prism reinforcing core.

[0028] 90. Water-blocking cable paste. Detailed Implementation

[0029] Please refer to Figure 1 and Figure 2 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, including a central reinforcing member 10, an optical fiber unit 20, a sleeve 30, a reinforcing layer 40, a first triangular prism reinforcing core 50, a weather-resistant layer 60, and an outer sheath 70.

[0030] The optical fiber unit 20 comprises multiple units, which are evenly twisted around the periphery of the central reinforcing member 10. Each optical fiber unit 20 includes a butterfly-shaped sheath 21, an optical fiber 22, a shielding layer 23, a waterproof layer 24, and multiple steel wires 25. The butterfly-shaped sheath 21 has two side wings 211. The optical fiber 22 is located at the center of the butterfly-shaped sheath 21. The shielding layer 23 covers the optical fiber 22, and the waterproof layer 24 covers the shielding layer 23. The multiple steel wires 25 are symmetrically arranged in the two side wings 211. In this embodiment, the central reinforcing member 10 is made of aramid fiber. Aramid fiber has the characteristics of high strength, high modulus, and light weight, and has good high temperature resistance and flame retardancy. The shielding layer 23 is a metal braided layer with good flexibility, high load-bearing capacity, and excellent tensile strength, electromagnetic shielding performance, corrosion resistance, and flame retardancy. The waterproof layer 24 is made of polyurethane, which has excellent waterproof performance, wear resistance, weather resistance, corrosion resistance, and aging resistance. Polyurethane also has high strength and elasticity. There are six steel wires 25, with three steel wires 25 arranged in a triangular pattern in the corresponding side wing 211, which helps to enhance the strength of the butterfly sheath 21 and improve the quality of the optical cable. There are four optical fiber units 20, which are evenly twisted around the periphery of the central reinforcing member 10.

[0031] The sleeve 30 covers the periphery of multiple optical fiber units 20. Multiple second triangular prism reinforcing cores 80 are disposed between the sleeve 30 and the multiple optical fiber units 20. Each second triangular prism reinforcing core 80 is disposed between two adjacent optical fiber units 20. The multiple second triangular prism reinforcing cores 80 strengthen the structure, effectively enhancing the tensile, bending, and compressive strength of the optical cable, resulting in better load-bearing capacity. In this embodiment, the sleeve 30 is made of PA, PE, or LSZH material. Water-blocking cable paste 90 is filled between the sleeve 30 and the multiple optical fiber units 20, and the multiple second triangular prism reinforcing cores 80 are disposed within the water-blocking cable paste 90, effectively enhancing the waterproof performance of the optical cable. The sleeve 30 covers the periphery of four optical fiber units 20.

[0032] The reinforcing layer 40 covers the outside of the sleeve 30; there are multiple first triangular prism reinforcing cores 50, which are evenly arranged in the reinforcing layer 40 at circumferential intervals. The arrangement of multiple first triangular prism reinforcing cores 50 can strengthen the structure and effectively enhance the tensile, bending and compressive strength of the optical cable, resulting in better load-bearing performance.

[0033] The weather-resistant layer 60 covers the reinforcing layer 40; in this embodiment, the weather-resistant layer 60 is made of ASA material, which has good weather resistance, chemical corrosion resistance, wear resistance, flame retardancy and aging resistance, and is environmentally friendly and safe.

[0034] The outer sheath 70 covers the weather-resistant layer 60; in this embodiment, the outer sheath 70 is made of LSZH material, which is a low-smoke halogen-free material with good flame retardant and high-temperature resistance properties, and is environmentally friendly and safe.

[0035] The key design feature of this utility model is:

[0036] By uniformly twisting multiple optical fiber units around a central reinforcing member, and then covering the periphery of the multiple optical fiber units with a sheath, a plurality of second triangular prism reinforcing cores are disposed between the sheath and the multiple optical fiber units. Each second triangular prism reinforcing core is disposed between two adjacent optical fiber units. The reinforcing layer is covered outside the sheath, and multiple first triangular prism reinforcing cores are evenly distributed circumferentially within the reinforcing layer. This structure effectively increases the strength of the optical cable, enhances its tensile and bending resistance, prevents the optical cable from breaking due to excessive tension during construction, ensures the signal transmission quality of the optical cable, and facilitates production and construction. It also prevents the optical cable from breaking due to stress concentration when bending at sharp bends, making the signal more stable, improving the quality of the optical cable, extending its service life, making the optical cable more competitive, and meeting current needs.

[0037] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A tensile and bending resistant optical cable, characterized in that: The device includes a central reinforcing member, optical fiber units, a sleeve, a reinforcing layer, first triangular prism reinforcing cores, a weather-resistant layer, and an outer sheath. Multiple optical fiber units are evenly wound around the central reinforcing member. Each optical fiber unit includes a butterfly-shaped sheath, an optical fiber, a shielding layer, a waterproof layer, and multiple steel wires. The butterfly-shaped sheath has two side wings. The optical fiber is located at the center of the butterfly-shaped sheath. The shielding layer covers the optical fiber, and the waterproof layer covers the shielding layer. The multiple steel wires are symmetrically arranged in the two side wings. The sleeve covers the periphery of the multiple optical fiber units. Multiple second triangular prism reinforcing cores are disposed between the sleeve and the multiple optical fiber units, with each second triangular prism reinforcing core positioned between two adjacent optical fiber units. The reinforcing layer covers the sleeve. Multiple first triangular prism reinforcing cores are evenly arranged circumferentially within the reinforcing layer. The weather-resistant layer covers the reinforcing layer. The outer sheath covers the weather-resistant layer.

2. The tensile and bending resistant optical cable according to claim 1, characterized in that: The central reinforcing member is made of aramid fiber.

3. The tensile and bending resistant optical cable according to claim 1, characterized in that: The shielding layer is a metal braided layer.

4. The tensile and bending resistant optical cable according to claim 1, characterized in that: The waterproof layer is made of polyurethane.

5. The tensile and bending resistant optical cable according to claim 1, characterized in that: There are six steel wires, with three steel wires arranged in a triangle in the corresponding side wing.

6. The tensile and bending resistant optical cable according to claim 1, characterized in that: The sleeve is made of PA, PE or LSZH material.

7. The tensile and bending resistant optical cable according to claim 1, characterized in that: The weather-resistant layer is made of ASA material.

8. The tensile and bending resistant optical cable according to claim 1, characterized in that: The outer sheath is made of LSZH material.

9. The tensile and bending resistant optical cable according to claim 1, characterized in that: Water-blocking cable grease is filled between the sleeve and the multiple optical fiber units, and the multiple second triangular prism reinforcing cores are disposed in the water-blocking cable grease.

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