Ribbon optical cable

Abstract

The utility model discloses a ribbon optical cable, which comprises a fiber core unit, a shielding layer, a reinforcing layer and a weather-proof sheath layer, and is characterized in that the fiber core unit is formed by arranging a plurality of single-mode optical fibers at intervals along the length direction of the cross section of the ribbon optical cable; the shielding layer wraps the outer side of the fiber core unit, the shielding layer is provided with a plurality of hollow cavities on the cross section of the optical cable, and the hollow cavities are arranged among the single-mode optical fibers; the reinforcing layer coats the outer side of the shielding layer; the weather-proof sheath layer wraps the outer side of the reinforcing layer. According to the arrangement, the shielding layer between the fiber core unit and the reinforcing layer can shield eddy current generated by materials in the reinforcing layer in a high electromagnetic field environment, signal attenuation can be prevented, the shielding layer is provided with a plurality of hollow cavities on the cross section of the optical cable, each hollow cavity is arranged among the single-mode optical fibers, and due to the existence of the hollow cavities, the shielding layer can be used for shielding the eddy current generated by the materials in the reinforcing layer in a high electromagnetic field environment. The bending performance and the compression resistance of the ribbon optical cable are enhanced, the structural design of the optical cable is optimized, and the service life of the ribbon optical cable is prolonged.

Description

Technical Field

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

[0002] Ribbon fiber optic cable is a high-density optical fiber communication cable consisting of multiple optical fibers arranged in parallel to form a flat ribbon structure, with an outer protective material. It is designed specifically for communication scenarios that require efficient space utilization. Due to its compact structure and efficient cabling, ribbon fiber optic cable solves the problems of large space occupation and low splicing efficiency of traditional optical cables, and is one of the core transmission media for modern high-bandwidth scenarios such as 5G and data centers.

[0003] However, since traditional ribbon optical cables are flat, metal reinforcements are usually required on the outer layer of the cable for mechanical protection. However, metal materials are prone to generating eddy currents in high electromagnetic field environments, which leads to signal attenuation. In addition, the multiple optical fibers in the ribbon structure are closely arranged and not easy to bend. As a result, the existing ribbon optical cables have poor anti-interference, bendability and pressure resistance, so they urgently need to be improved. Utility Model Content

[0004] The main purpose of this invention is to propose a ribbon optical cable to solve the problems of poor anti-interference, bending and compressive strength of ribbon optical cables in related technologies.

[0005] To achieve the above objectives, this utility model proposes a ribbon optical cable, comprising:

[0006] The fiber core unit consists of multiple single-mode optical fibers spaced apart along the longitudinal direction of the ribbon cable's cross-section;

[0007] A shielding layer is provided, which covers the outside of the fiber core unit. The shielding layer has multiple hollow cavities on the cross-section of the optical cable, and each hollow cavity is disposed between each single-mode optical fiber.

[0008] A reinforcing layer, which covers the outside of the shielding layer;

[0009] A weather-resistant sheath layer, which covers the outer side of the reinforcing layer.

[0010] In some embodiments, the two single-mode fiber supports are provided with two hollow cavities, and the two hollow cavities are spaced apart along the short direction of the cross-section of the ribbon optical cable.

[0011] In some embodiments, the hollow cavity disposed between the two single-mode optical fibers has a trapezoidal cross-section.

[0012] In some embodiments, a fastening structure is provided between the shielding layer and the reinforcing layer.

[0013] In some embodiments, the fastening structure includes a plurality of grooves disposed on the shielding layer and a plurality of ribs disposed on the reinforcing layer, each of the ribs being located within its respective groove.

[0014] In some embodiments, the grooves and the ribs are spaced apart along the extension direction of the ribbon optical cable.

[0015] In some embodiments, the shielding layer is made of a conductive polymer material.

[0016] In some embodiments, the reinforcing layer is made of high-modulus aramid fibers and resin composite materials.

[0017] In some embodiments, the weather-resistant sheath layer is made of polyurethane material, and the surface of the weather-resistant sheath is provided with an anti-slip concave surface.

[0018] The beneficial effects of this utility model's technical solution are as follows:

[0019] The ribbon optical cable of this invention consists of a fiber core unit, a shielding layer, a reinforcing layer, and a weather-resistant sheath layer arranged from the inside out. This arrangement allows the shielding layer between the fiber core unit and the reinforcing layer to shield the eddy currents generated by the material in the reinforcing layer in a high electromagnetic field environment, preventing signal attenuation. The shielding layer has multiple hollow cavities on the cross-section of the optical cable, with each hollow cavity positioned between the single-mode optical fibers. The presence of these hollow cavities enhances the flexibility and compressive strength of the ribbon optical cable, thereby optimizing the cable structure design and extending its service life. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the ribbon optical cable according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 Cross-sectional view at point AA;

[0022] Figure 3 for Figure 1 Cross-sectional view at point BB.

[0023] Explanation of icon numbers:

[0024] 100. Fiber core unit; 110. Single-mode fiber; 200. Shielding layer; 210. Hollow cavity; 220. Groove; 300. Reinforcing layer; 310. Rib; 400. Weather-resistant sheath layer; 410. Anti-slip concave surface. Detailed Implementation

[0025] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. In addition, the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0026] To address the technical deficiencies in related technologies, this utility model provides a ribbon optical cable. Please refer to [link / reference]. Figures 1 to 3 The ribbon optical cable includes: fiber core unit 100, shielding layer 200, reinforcing layer 300, and weather-resistant sheath layer 400. The fiber core unit 100 is composed of multiple single-mode optical fibers 110 arranged at intervals along the longitudinal direction of the cross-section of the ribbon optical cable. The single-mode optical fiber 110 is an optical fiber that only allows optical signals to be transmitted in a single mode. It is designed to meet the communication requirements of long distance, high bandwidth, and low loss. In addition, the number of single-mode optical fibers 110 can be 4, 8, 12, or other numbers, which are not specifically limited here.

[0027] Furthermore, the shielding layer 200 covers the outside of the fiber core unit 100. The shielding layer 200 has multiple hollow cavities 210 disposed on the cross-section of the optical cable, with each hollow cavity 210 positioned between each single-mode fiber 110. In this embodiment, the shielding layer 200 is made of a conductive polymer layer material, such as a carbon black-polyaniline composite material or a graphene-polypyrrole composite material. It should be noted that each hollow cavity 210 can be formed by setting the hollow cavity on an extrusion die and extruding it in one step. Since each hollow cavity 210 is positioned between each single-mode fiber 110, the bending capacity between the single-mode fibers 110 can be increased. In addition, the optical cable is less prone to permanent deformation after being compressed, and its compressive strength can be significantly improved. Thus, without increasing the specific gravity of the ribbon optical cable, the mechanical properties of the ribbon optical cable can be optimized, and its service life extended.

[0028] In addition, the reinforcing layer 300 covers the outside of the shielding layer 200; the weather-resistant sheath layer 400 covers the outside of the reinforcing layer 300. In this embodiment, the reinforcing layer 300 is made of high-modulus aramid fiber and resin composite material. The use of high-modulus aramid fiber and resin composite material ensures that the reinforcing layer 300 does not contain any metal materials. This not only provides mechanical support and protection for the optical cable but also avoids electromagnetic interference problems caused by metal materials. The aramid fiber and resin are completely insulating, blocking current paths and preventing lightning strike damage. It has high strength, lightweight, insulation, and corrosion resistance, making it suitable for areas with high electromagnetic interference, such as near high-voltage transmission lines and railway contact networks. The weather-resistant sheath layer 400 is mainly made of polyurethane material. The weather-resistant sheath layer 400 is the outermost protective structure of the ribbon optical cable. Its core function is to resist the physical, chemical, and climatic erosion of the internal structure of the ribbon optical cable by the external environment. Because the weather-resistant sheath layer 400 has waterproof, moisture-proof, UV-resistant, and chemical corrosion-resistant functions, the ribbon optical cable can operate stably for a long time in complex environments.

[0029] Through the above technical solution, the ribbon optical cable of this utility model is provided with a fiber core unit 100, a shielding layer 200, a reinforcing layer 300 and a weather-resistant sheath layer 400 respectively from the inside to the outside. With this arrangement, the shielding layer 200 between the fiber core unit 100 and the reinforcing layer 300 can shield the eddy currents generated by the material in the reinforcing layer 300 in a high electromagnetic field environment, which can prevent signal attenuation. The shielding layer 200 has multiple hollow cavities 210 on the cross-section of the optical cable. Each hollow cavity 210 is arranged between each single-mode optical fiber 110. Due to the presence of the hollow cavities 210, the ribbon optical cable is more flexible and has enhanced compressive strength, thereby optimizing the optical cable structure design and extending the service life of the ribbon optical cable.

[0030] In this embodiment, the two single-mode fiber 110 supports are provided with two hollow cavities 210, which are spaced apart along the shorter direction of the cross-section of the ribbon optical cable. This arrangement, with two hollow cavities 210 in the thickness direction of the ribbon optical cable, makes the ribbon optical cable more flexible, increases its elastic deformation capability, and strengthens its compressive strength in the thickness direction as well.

[0031] Furthermore, the hollow cavity 210 located between the two single-mode optical fibers 110 has a trapezoidal cross-section. This allows for a larger space within the hollow cavity 210, further increasing the space available for elastic deformation.

[0032] To ensure a secure bond between the shielding layer 200 and the reinforcing layer 300 along the extension direction of the ribbon optical cable and to prevent separation of the two layers, a fastening structure is provided between the shielding layer 200 and the reinforcing layer 300 in this embodiment. This fastening structure may involve providing an adhesive layer between the shielding layer 200 and the reinforcing layer 300, thereby creating adhesion between them.

[0033] In this embodiment, the fastening structure may also include multiple grooves 220 disposed on the shielding layer 200 and multiple ribs 310 disposed on the reinforcing layer 300. Each rib 310 is located in a groove 220, and the grooves 220 and the ribs 310 are spaced apart along the extension direction of the ribbon optical cable. During the manufacturing process of the shielding layer 200, multiple grooves 220 are punched on the side of the shielding layer 200. During the manufacturing process of the reinforcing layer 300, it is covered on the shielding layer 200 by an extrusion process. At this time, the material used for the reinforcing layer 300 is a resin composite material. Since the resin composite material is in a molten state, it can form ribs 310 by itself during the extrusion process and extend into the corresponding grooves 220 of the shielding layer 200, thereby forming a fastening structure. This can prevent the two layers from being pulled apart in the extension direction of the ribbon optical cable.

[0034] Furthermore, the surface of the weather-resistant sheath is provided with anti-slip concave surfaces 410, which can increase the coefficient of friction and prevent the ribbon optical cable from shifting during the burial process. In addition, the surface of the weather-resistant sheath can also be coated with an abrasion-resistant coating (such as a fluorinated layer) to make the surface of the weather-resistant sheath even more abrasion-resistant.

[0035] The above description is only a part or preferred embodiment of this utility model. Neither the text nor the drawings should limit the scope of protection of this utility model. All equivalent structural transformations made using the content of this utility model specification and drawings under the overall concept of this utility model, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.

Claims

1. A ribbon optical cable characterized by comprising: The ribbon optical cable comprises: a core unit (100) comprising a plurality of single-mode optical fibers (110) arranged at intervals along a long direction of a cross section of the ribbon optical cable; a shielding layer (200) covering the core unit (100), the shielding layer (200) being provided with a plurality of hollow cavities (210) on the cross section of the optical cable, each of the hollow cavities (210) being arranged between two of the single-mode optical fibers (110); a reinforcing layer (300) covering the shielding layer (200); a weather-resistant sheath layer (400) covering the reinforcing layer (300).

2. The ribbon optical cable of claim 1, wherein, Two of the single-mode optical fiber (110) supports are provided with two of the hollow cavities (210), and the two hollow cavities (210) are arranged at intervals along a short direction of the cross section of the ribbon optical cable.

3. The ribbon optical cable of claim 2, wherein, The hollow cavities (210) arranged between the two single-mode optical fibers (110) are arranged in a trapezoidal cross-sectional structure.

4. The ribbon optical cable of claim 1, wherein, A fastening structure is arranged between the shielding layer (200) and the reinforcing layer (300).

5. The ribbon optical cable of claim 4, wherein, The fastening structure comprises a plurality of grooves (220) arranged on the shielding layer (200) and a plurality of convex ribs (310) arranged on the reinforcing layer (300), each of the convex ribs (310) being arranged in one of the grooves (220).

6. The ribbon optical cable of claim 5, wherein, Each of the grooves (220) and each of the convex ribs (310) are arranged at intervals along an extension direction of the ribbon optical cable.

7. The ribbon optical cable of claim 1, wherein, The shielding layer (200) is made of a conductive polymer material.

8. The ribbon optical cable of claim 1, wherein, The reinforcing layer (300) is made of high-modulus aramid fiber and resin composite material.

9. The ribbon optical cable of claim 1, wherein, The weather-resistant sheath layer (400) is made of polyurethane material, and the surface of the weather-resistant sheath is provided with anti-slip concave surfaces (410).

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