GB2608254A

GB2608254A - Easy-strip flat-branch long-distance optical cable

Info

Publication number: GB2608254A
Application number: GB2206211.1A
Authority: GB
Inventors: Shen Chenxi; Xia Wenkui; Zhang Xinyuan; Chen Danyu; Nie Taotao; Zhao Bo; Huang Qiang
Original assignee: Hengtong Optic Electric Co Ltd
Current assignee: Hengtong Optic Electric Co Ltd
Priority date: 2020-12-24
Filing date: 2021-11-26
Publication date: 2022-12-28
Also published as: GB202206211D0

Abstract

Provided is an easy-strip flat-branch long-distance optical cable, satisfying the mechanical environmental properties of tensile resistance, crush resistance, radiation resistance, and long service life, and can be used for both outdoor long-distance and indoor wiring purposes. The invention comprises a central reinforcing member (1); an optical unit (2) is arranged on each side of the central reinforcing member (1); in a cross-sectional state, the two optical units (2) and the central reinforcing member (1) form a straight line arrangement; the two optical units (2) and the central reinforcing member (1) are covered with a flat protective sheath layer (3) around their outer perimeter; the flat protective sheath layer (3) is provided with a plurality of concave stripping slots (4) on its outer periphery.

Description

EASILY-STRIPPABLE FLAT OPTICAL CABLE

FIELD OF THE INVENTION

The present invention relates to the technical field of optical cable structures, and more particularly to an easily-strippable flat optical cable.

DESCRIPTION OF THE RELATED ART

As an important part of electronic communication, optical fiber and cable industry has made great contributions to the development of national economy, and has promoted the systematic effect of electronic information industry. The development and growth of optical fiber and cable industry has laid solid foundation for China's communication field, and this industry has become important support for the utilization of FTTH and FTTA systems, tri-network integration, large-scale 4G construction and 50 explorations in China.

Existing remote optical cables and branch optical cables generally adopt subunit and filler rope reinforced structure, and adopts spiral stranded mode for structural design, so the production process is limited with respect to the equipment, and a great number of aramid fibers are generally used as load-bearing elements in optical cables, resulting in high cost.

SUMMARY OF THE INVENTION

In view of the problem mentioned above, the present invention provides an easily-strippable flat optical cable that has mechanical and environmental properties of high tensile strength, crush resistance, radiation resistance, and long service life, which is suitable for both outdoor remote use and indoor cabling use.

An easily-strippable flat optical cable includes a central reinforcer, in which an optical unit is provided respectively on two sides of the central reinforcer, the two optical units and the central reinforcer form a linear arrangement in cross section, the periphery of the two optical units and the central reinforcer is covered with a flat jacket layer, and several concave stripping grooves are provided on the periphery of the flat jacket layer.

The outer diameter of the central reinforcer is the same as the outer diameter of the optical units on both sides, so that these three units form an overall structure with consistent thickness.

The central reinforcer includes a central FRP reinforcer and a jacket layer on the periphery.

The center of the optical unit is an optical fiber arrangement region. The periphery of the optical fiber arrangement region is covered sequentially with an aramid fiber yarn layer and an inner jacket layer made specifically of an LSZH jacket material.

The optical fiber arrangement region includes specifically a plurality of bare fibers or a single tight buffer fiber.

The flat jacket layer is extruded from an anti-blocking LSZH jacket material. The region of the periphery of the flat jacket layer corresponding to the optical units on both sides has an arc-shaped structure.

The optical cable according to the present invention, has a simple structure and a small outer diameter and is designed with stripping grooves, allows improved construction efficiency, and is suitable to be popularized on the market both as a remote optical cable and as a branch optical cable. In an environment suitable for layout of conventional remote optical cables, an FRP reinforcer of relatively lower cost is used partially in place of aramid fiber yarn as the essential load-bearing element depending on the application environment, thereby resulting in a cost-effective product, which is favorable for popularization and application of the product. Also, such an optical cable has a flat structure using a dual-layer jacket, and this product has a compact structure and excellent crush resistance and environmental properties, making it applicable to environments at -40-85°C and requiring crush resistance over 4000N/100mm. It has the mechanical and environmental properties of high tensile strength, crush resistance, radiation resistance, and long service life, which is suitable for both outdoor remote use and indoor cabling use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic cross-sectional view of a specific embodiment of the present invention.

Reference numbers in the drawings: central reinforcer 1; central FRP reinforcer 11; jacket layer 12; optical unit 2; aramid fiber yarn layer 21; inner jacket layer 22; single optical fiber 23; tight buffer layer 24; flat jacket layer 3; stripping groove 4.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. I, an easily-strippable flat optical cable includes a central reinforcer I, and an optical unit 2 is provided respectively on two sides of the central reinforcer I. The two optical units 2 and the central reinforcer I form a linear arrangement in cross section. The periphery of the two optical units 2 and the central reinforcer I is covered with a flat jacket layer 3. Several concave stripping grooves 4 are provided on the periphery of the flat jacket layer 3.

The outer diameter of the central reinforcer I is the same as the outer diameter of the optical units 2 on both sides, so that these three units form an overall structure with consistent thickness.

The central reinforcer 1 includes a central FRP reinforcer 11 and a jacket layer 12 on the periphery.

The center of the optical unit 2 is an optical fiber arrangement region. The periphery of the optical fiber arrangement region is covered sequentially with an aramid fiber yarn layer 21 and an inner jacket layer 22 made specifically of an LSZH jacket material.

The optical fiber arrangement region includes specifically a plurality of bare fibers or a single tight buffer fiber. In a specific embodiment, as shown in FIG. 1, the optical fiber arrangement region includes a single optical fiber 23 and a peripheral tight buffer layer 24.

The flat jacket layer 3 is extruded from an anti-blocking LSZH jacket material. The regions of the periphery of the flat jacket layer 3 corresponding to thc optical units 2 on both sides of the central rcinforccr are arc-shaped.

The optical cable according to the present invention has a simple structure and a small outer diameter, and is designed with stripping grooves, allows improved construction efficiency, and is suitable to be popularized on the market both as a remote optical cable and as a branch optical cable. In an environment suitable for layout of conventional remote optical cables, an FRP reinforcer of relatively lower cost is used partially in place of aramid fiber yarn as the essential load-bearing element depending on the application environment, thereby resulting in a cost-effective product, which is favorable for popularization and application of the product. Also, such an optical cable has a flat structure using a dual-layer jacket, and this product has a compact structure and excellent crush resistance and environmental properties, making it applicable to environments at -40-85°C and requiring crush resistance over 4000N/100mm.

In the optical cable of the invention, the central reinforcer is used as a load-bearing element in place of the filler rope in conventional remote optical cables to reduce cost. Several concave stripping grooves are provided on the periphery of the flat jacket layer and a jacket made of an anti-blocking LSZ material is used, so that the optical cable can be easily stripped and branched and allows efficient construction. Also, the optical unit thereof uses a single-core optical cable or an MPO optical cable as a branch, which makes it suitable for both outdoor remote use and indoor cabling use.

It is apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, but can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, no matter from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present invention is defined by the following claims rather than the above description, so it is intended to encompass all changes that fall within the meaning and scope of the equivalent elements of the claims within the present invention. Any reference numbers in the claims shall not be regarded as limiting the relevant claims.

In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution, and this description of the specification is intended only for clarity. Those skilled in the art shall take this specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. Ii

Claims

WHAT IS CLAIMED IS: 1. An easily-strippable flat optical cable, comprising a central reinforcer, wherein an optical unit is provided respectively on two sides of the central reinforcer, the two optical units and the central reinforcer form a linear arrangement in cross section, the periphery of the two optical units and the central reinforcer is covered with a flat jacket layer, and several concave stripping grooves are provided on the periphery of the flat jacket layer.
2. The easily-strippable flat optical cable of claim I, wherein the outer diameter of the central reinforcer is the same as the outer diameter of the optical units on both sides, so that these three units form an overall structure with consistent thickness 3. The easily-strippable flat optical cable of claim I wherein the central reinforcer includes a central FRP reinforcer and a jacket layer on the periphery.4 The easily-strippable flat optical cable of claim 1, wherein the center of the optical unit is an optical fiber arrangement region, and the periphery of the optical fiber arrangement region is covered sequentially with an aramid fiber yarn layer and an inner jacket layer made of an LSZH jacket material The easily-strippable flat optical cable of claim 4, wherein the optical fiber arrangement region includes a plurality of bare fibers or a single tight buffer fiber.6. The easily-strippable flat optical cable of claim 1, wherein the flat jacket layer is extruded from an anti-blocking LSZH jacket material, and the region of the periphery of the flat jacket layer corresponding to the optical units on both sides has an arc-shaped structure.