WO2017020369A1 - Lightweight all-dielectric self-supporting optical cable - Google Patents

Abstract

Disclosed is a lightweight all-dielectric self-supporting optical cable, comprising an outer sheath (1) and a cable core. An inner wall of the outer sheath (1) is provided with a ripcord (6). The cable core is formed of three SZ-stranded units, and the three units consist of one optical unit (3) and two non-metal strength members (5) or consist of two optical units (3) and one non-metal strength member (5). The optical unit (3) is provided therein with optical fibers (2) and a fiber gel (7) filling the entire optical unit (3) for fixing the optical fibers (2). The optical cable uses three stranded units to form a cable core, thus reduces the diameter of the optical cable, simplifies the structure and facilitates miniaturization. The non-metal strength member (5) ensures the tensile strength of the optical cable and is advantageous for the laying and lightning protection. The ripcord (6) can bear a certain level of tensile force and high temperature, thus enabling easy stripping of an outer sheath of an optical cable.

Description

Light all-media self-supporting optical cable Technical field

The invention relates to a light all-media self-supporting optical cable used in the field of optical communication.

Background technique

With the continuous development of communication cable technology, there are more and more applications for optical cables. The structure of the cable is also constantly being updated according to the needs of the application. The traditional optical cable core is a five-unit and above twisted structure. The weight of the cable core directly affects the load-bearing capacity of the reinforcing member. The number of cable core units increases, the weight of the cable core increases, the load-bearing capacity of the reinforcing member needs to be increased, the reinforcing member is thickened, and the optical cable is added. The self-weight, the manufacturing cost of the cable will also increase. Therefore, it is necessary to design a compact cable with a light weight.

Summary of the invention

The invention provides a light all-media self-supporting optical cable.

The technical solution adopted by the invention is:

A lightweight all-media self-supporting optical cable includes an outer sheath and a cable core, and an inner cable is provided at the inner wall of the outer sheath, the cable core is composed of three units SZ, and the three units are composed of One light unit and two non-metal reinforcing units are composed of or consist of two light units and one non-metal reinforcing unit, and the optical unit is provided with an optical fiber and a fiber paste filled in the entire light unit for fixing the optical fiber.

Further, a water blocking strip for covering the cable core is disposed between the cable core and the outer sheath.

Further, a water blocking yarn I is disposed in a center formed by twisting the light unit with the non-metal reinforcing unit SZ.

Alternatively, the cable core and the outer sheath are filled with a cable for covering the core.

In another aspect, a water blocking yarn II is disposed in a center formed by twisting the light unit with the non-metal reinforcing unit SZ, and the water blocking yarn III is wound around the core.

The invention has the advantages that the three cores are mutually SZ stranded to form the cable core, the diameter of the optical cable is reduced, the cable structure is simplified, and the optical cable structure is miniaturized, and one or two non-metallic reinforcing units are arranged in the core structure. The utility model has the advantages of light weight, large tensile strength and small elongation, which ensures the tensile strength of the optical cable, is easy to lay, and has the function of lightning protection, and the cable of the inner wall of the outer sheath can withstand a certain tensile force and a high temperature. All-weather communication, not easy to pull hair, and environmentally friendly, can easily open and strip the outer sheath of the cable, which is convenient for construction.

DRAWINGS

The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

1 is a schematic structural view of Embodiment 1 of the present invention;

2 is a schematic structural view of Embodiment 2 of the present invention;

3 is a schematic structural view of Embodiment 3 of the present invention;

4 is a schematic structural view of Embodiment 4 of the present invention.

Among them: 1, outer sheath; 2, optical fiber; 3, light unit; 4-1, water-blocking yarn I; 4-2, water-blocking yarn II; 4-3, water-blocking yarn III; ; 6, open cable; 7, fiber paste; 8, water blocking tape; 9, cable paste.

detailed description

Example 1

As shown in FIG. 1 , a light full-media self-supporting optical cable includes an outer sheath 1 and a cable core, and an open cable 6 is disposed at an inner wall of the outer sheath to withstand a certain tensile force and a high temperature to achieve all-weather Communication, not easy to pull hair, and environmentally friendly, can easily open and strip the outer sheath of the cable for easy construction. The cable core is composed of a light unit 3 and two non-metallic reinforcing units 5SZ, which reduces the diameter of the cable and simplifies the cable structure. Conducive to the miniaturization of the optical cable structure, because the non-metallic reinforcing unit is light in weight, large in tensile strength, and small in elongation, the tensile strength of the optical cable is ensured, and it is easy to lay, and the optical fiber 2 is disposed in the optical unit and filled in the entire optical unit. And the fiber paste 7 for fixing the optical fiber, in order to enhance the water blocking performance, a water blocking strip 8 for covering the cable core (three units) is disposed between the cable core and the outer sheath 1, and the light unit 3 is The water blocking yarn I4-1 is disposed in the center formed by the stranding of the metal reinforcing unit 5SZ.

Example 2

As shown in Fig. 2, the structure is basically the same as that of Embodiment 1, except that the core is composed of two light units 3 and one non-metallic reinforcing unit 5SZ stranded.

Example 3

As shown in FIG. 3, a light full-media self-supporting optical cable includes an outer sheath 1 and a cable core, and an open cable 6 is disposed at an inner wall of the outer sheath to withstand a certain pulling force and a high temperature to achieve all-weather Communication, not easy to pull hair, and environmentally friendly, can easily open and strip the outer sheath of the cable for easy construction. The cable core is composed of a light unit 3 and two non-metallic reinforcing units 5SZ, which reduces the diameter of the cable and simplifies the cable structure. Conducive to the miniaturization of the optical cable structure, because the non-metallic reinforcing unit is light in weight, large in tensile strength, and small in elongation, the tensile strength of the optical cable is ensured, and it is easy to lay, and the optical fiber 2 is disposed in the optical unit and filled in the entire light. In order to enhance the water blocking performance, the fiber paste 7 for fixing the optical fiber in the unit is filled with a cable 9 for covering the core between the core and the outer sheath.

Example 4

As shown in FIG. 4, the structure is basically the same as that of Embodiment 3, except that the cable core is composed of two light units 3 and one non-metal reinforcing unit 5SZ, in order to enhance the water blocking performance, the light unit and the non-metal reinforcing unit SZ A water blocking yarn II4-2 is disposed in the center formed after the stranding, and a water blocking yarn III4-3 is wound around the core.

The optical cable of the invention is a self-supporting optical cable. When used as an overhead laying cable, it does not need to be attached to a load-bearing hanging wire made of steel strand or steel wire, and the construction is erected once, and the first erection when the conventional optical fiber cable is removed is removed. The process of bearing the hanging line does not have a cumbersome hooking procedure, which enables more convenient construction laying and reduces construction costs. At the same time, the optical cable of the invention has mechanical and environmental properties such as good tensile, bending resistance, repeated bending, impact, flattening, torsion, high and low temperature circulation, water seepage, etc., especially when the bending performance of the optical cable has a bending state of 6 times the diameter of the optical cable. The additional attenuation of the fiber does not exceed 0.05 dB.

Claims (5)

A light all-media self-supporting optical cable comprising an outer sheath and a cable core, wherein: an outer cable is provided at an inner wall of the outer sheath, and the cable core is composed of three units SZ stranded, The three units are composed of one light unit and two non-metal reinforcing units or two light units and one non-metal reinforcing unit, which are provided with an optical fiber and filled in the entire optical unit and used for fixing the optical fiber. Fiber paste. The light-weight all-media self-supporting optical cable according to claim 1, wherein a water blocking strip for covering the cable core is disposed between the cable core and the outer sheath. The light-weight all-media self-supporting optical cable according to claim 2, wherein the water-resistant yarn I is disposed in a center formed by twisting the optical unit and the non-metallic reinforcing unit SZ. The lightweight all-media self-supporting optical cable according to claim 1, wherein the cable core and the outer sheath are filled with a cable for covering the cable core. The light-weight all-media self-supporting optical fiber cable according to claim 1, wherein the light-emitting yarn II is disposed in a center formed by twisting the light unit and the non-metal reinforcing unit SZ, and the cable core is externally The water blocking yarn III is wound.

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