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A light-duty and repeatedly retractable bundled optical cable and its preparation method

An optical cable, light technology, applied in the field of bundled optical cables, can solve the problems of optical fiber damage, heavy weight, optical fiber fracture, etc., and achieve the effects of rodent damage resistance, low linear expansion coefficient, and low optical fiber pressure.

Active Publication Date: 2019-09-17
THE 23RD RES INST OF CHINA ELECTRONICS TECH GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the bundled optical cable of this structure has high fiber density and good mechanical environmental performance, since the optical cable of this structure adopts the structure of placing an optical fiber ribbon in a PBT loose tube, the outer diameter of each optical fiber unit is 5mm, resulting in the outer diameter of the optical cable Thick (about 22mm) and heavy (about 650kg / km) will bring great difficulties to laying, and at the same time, PBT material has poor bending performance, and it will also appear in the space with small bending radius for laying It is easy to cause the loose tube 3' to bend and break, and the external moisture will invade the surface of the optical fiber and cause the optical fiber to break.
Conventional sheath adopts casing extrusion molding method or pressure extrusion molding method. The casing casing extrusion molding method is adopted for the sheath. The core is exposed on the outside of the strength member, and the optical fiber is prone to be damaged by external stress; if the sheath adopts pressure extrusion, the advantage is that the combination between the cable core, the strength member and the sheath is very tight, and the fiber optic cable is retracted after many times. , the relative position between the cable core and the strength member and the sheath will not change, and the performance is relatively stable. It is generally suitable for outdoor overhead, direct buried optical cables and submarine cables. The pressure will be transmitted to the optical fiber, directly affecting the transmission performance of the optical fiber

Method used

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  • A light-duty and repeatedly retractable bundled optical cable and its preparation method
  • A light-duty and repeatedly retractable bundled optical cable and its preparation method
  • A light-duty and repeatedly retractable bundled optical cable and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The specific realization process of this embodiment is as follows:

[0044] 1. Optical fiber coloring

[0045] A layer of coloring material is coated on the single-mode optical fiber. In this embodiment, the ink is preferred. The optical fiber ink has the advantages of good fluidity, fast curing speed, and not easy to fade. Optical fiber ink should be stirred before processing to ensure uniform color of the ink. The stirring speed is 8 rpm and the time is 4 hours.

[0046] This process adopts UV ultraviolet curing process. The outer diameter of the colored optical fiber is 0.24mm, and it is rewound on a special optical fiber disk. The tension of the pay-off line is 50g, and the tension of the take-up line is 60g. Jitter, on the other hand, can ensure the quality of the optical fiber on the take-up reel, the speed is 1200m / min, the size of the coloring mold is 258μm, and the temperature of the coloring mold is controlled at 35°C.

[0047] 2. Production of optical fiber...

Embodiment 2

[0056] The outer diameter of the optical fiber unit 2 is 3.0 mm, and the optical fiber unit 2 is formed by extruding a layer of polyolefin after laying glass yarns on the outer periphery of 12 colored optical fibers.

[0057] Colored fiber is OM3 multimode fiber. The cable sheath 4 is polyolefin with a wall thickness of 1 mm and a diameter of 10 mm. The reinforcing member 3 is made of polyparabenzobenzobisoxazole.

[0058] For the specific implementation process of this embodiment, see image 3 as follows:

[0059] 1. Optical fiber coloring

[0060] Apply a layer of ink to the outside of bend-insensitive multimode OM3 optical fiber. Optical fiber ink should be stirred before processing to ensure uniform color of the ink. The stirring speed is 8 rpm and the time is 5 hours.

[0061] This process adopts UV ultraviolet curing process. The outer diameter of the colored optical fiber is 0.26mm, and it is rewound on a special optical fiber reel. The tension of the wire is 60g, ...

Embodiment 3

[0071] The specific realization process of this embodiment is as follows:

[0072] 1. Optical fiber coloring

[0073] Coat a layer of ink on the bend-insensitive OM4 optical fiber. The optical fiber ink has the advantages of good fluidity, fast curing speed, and not easy to fade.

[0074] The optical fiber ink should be stirred before processing to ensure uniform color of the ink. The stirring speed is 8 rpm and the time is 4 hours.

[0075] This process adopts UV ultraviolet curing process. The outer diameter of the colored optical fiber is 0.25mm, and it is rewound on a special optical fiber reel. The tension of the wire is 55g, the tension of the wire is 65g, the speed is 1200m / min, and the size of the coloring mold is 258μm. The temperature of the coloring mold is controlled at 25°C.

[0076] 2. Production of optical fiber unit

[0077] Evenly twist aramid fibers around the 6 above-mentioned colored optical fibers and extrude the sheath at the same time, twist 5 pieces ...

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Abstract

The invention discloses a lightweight fiber bundled optical cable capable of being retracted and released repeatedly. The fiber bundled optical cable comprises cable cores, reinforcing members, an outer sheath and an armor layer which are arranged in sequence from inside to outside, and is characterized in that the fiber bundled optical cable adopts a plurality of optical fiber units which are subjected to single-spiral twisting by taking a central element as the center and coated with a cladding to form a cable core, each optical fiber unit is formed by twisting or directly placing reinforcing materials on the periphery of 1-12 optical fibers and then provided with an internal sheath thereon by extrusion molding, and the outer diameter of each optical fiber unit ranges from 2.0 to 3.0 mm. A preparation method of the fiber bundled optical cable comprises the steps of coloring the optical fibers, manufacturing the optical fiber units, cabling, twisting aramid fibers, extruding the sheaths and braiding the armor layer. The fiber bundled optical cable provided by the invention reduces the outer diameter and weight of the optical cable, and can improve the repeated retraction and releasing performance of the optical cable and the production efficiency without degrading the comprehensive performance of the fiber bundled optical cable in the mechanical and environmental aspects when compared with the existing conventional fiber bundled optical cables.

Description

technical field [0001] The invention belongs to the field of optical cables, in particular to bundled optical cables. [0002] technical background [0003] The existing bundled optical cable structures on the market are as follows: figure 1 As shown, the bundled optical cable is sequentially provided with a central element 7', an optical fiber ribbon 1', a fiber paste 2', a loose tube 3', an inner sheath 4', a strength member 5', an optical cable sheath 6' and Armor 8'. Although the bundled optical cable of this structure has high fiber density and good mechanical environmental performance, since the optical cable of this structure adopts the structure of placing an optical fiber ribbon in a PBT loose tube, the outer diameter of each optical fiber unit is 5mm, resulting in the outer diameter of the optical cable Thick (about 22mm) and heavy (about 650kg / km) will bring great difficulties to laying, and at the same time, PBT material has poor bending performance, and it will...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/44
Inventor 朱有财徐泽宇曹永恒徐继东徐春伟
Owner THE 23RD RES INST OF CHINA ELECTRONICS TECH GRP CORP
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