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A hybrid loose-tube layer-stranded optical cable and its manufacturing method

A production method and a hybrid technology, which are applied in the field of optical cable manufacturing, can solve the problems of the influence of the optical cable core structure stability, the reduction of optical fiber density, and the difficulty in meeting design requirements, etc., to achieve improved optical fiber density, satisfactory water permeability, and stable structure. Effect

Active Publication Date: 2018-03-09
FURUKAWA ELECTRIC XIAN OPTICAL COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cable core of this kind of fiber optic cable is relatively loose-tube stranded fiber optic cable (such as figure 2 As shown), there is still a large gap between the loose tube and the metal composite tape adjacent to the cable core; the density of optical fibers per unit cross-section of the optical fiber ribbon cable is relatively reduced; Large (400mm ~ 600mm), it is difficult to meet the design requirements in the 1m water seepage test of the optical cable; and it has a great impact on the stability of the optical cable core structure

Method used

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  • A hybrid loose-tube layer-stranded optical cable and its manufacturing method
  • A hybrid loose-tube layer-stranded optical cable and its manufacturing method
  • A hybrid loose-tube layer-stranded optical cable and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] like image 3 As shown, it is a schematic diagram of the structure of an eight-unit hybrid loose-tube layer-stranded optical cable. The cable core consists of a loose tube 6 of a built-in fiber bundle or fiber ribbon containing an optical fiber bundle or fiber ribbon matrix 7 and fiber paste 8, a loose tube 6 of an optical fiber bundle with a small number of cores, and is longitudinally twisted in an "SZ" manner. Wrapped around the central reinforcement 5, and then bidirectionally wound the binding yarn 3 outside the stranding unit to form a stable optical cable core; the optical cable core is filled with water-blocking cable paste 4 and tear rope 9, and then sequentially wrapped outside the cable core The metal moisture barrier layer 2 is vertically wrapped, and the extrusion sheath 1 forms the present invention.

[0062] Wherein, the sheath 1 is made of polyethylene material, low-smoke halogen-free flame-retardant polyolefin material, polyamide material or thermoplas...

Embodiment 2

[0076] like Figure 4 As shown, it is a schematic diagram of the structure of a twelve-unit hybrid loose-tube layer-stranded armored optical cable. It differs from Embodiment 1 in that: the number of stranding units of the optical cable core is increased to twelve, the stranding units of the cable core include filling ropes 10, the central strengthening member 5 is extruded with a central strengthening member cushion 11, and the sheathing The sleeve 1 is longitudinally wrapped with an armor layer 12 in turn, and an outer sheath 13 is extruded.

[0077] Wherein, the filling rope 10 can be a polyethylene material, a polypropylene material or a filling rope that contains a PBT outer coating made by foaming technology, and the outer diameter of the filling rope 10 is the same as the outer diameter of the optical fiber bundle or the loose tube of the optical fiber ribbon. same diameter.

[0078] Wherein, the cushion layer 11 of the central strength member can be polyethylene mate...

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Abstract

The invention discloses a hybrid loose-tube stranded optical cable and a manufacturing method thereof, and also includes a manufacturing device. The optical cable includes a sheath, and a metal moisture barrier layer and a yarn binding layer arranged in sequence on the inner layer of the sheath from outside to inside. , the binding layer is provided with at least one loose tube with built-in optical fiber bundles or ribbons and at least one central strength member, which is wound longitudinally around the central strength member by "SZ" stranding, and the loose tube with built-in optical fiber bundles or optical fiber ribbons The gaps between the ferrules are filled with loose ferrules for fiber bundles with small core counts. The production method includes: the central strength member, the loose tube with built-in optical fiber bundle or optical fiber ribbon, and the loose tube with small number of optical fiber bundles pass through the wire mold and stranding table, and are pulled to the yarn binding table, and the cable is pulled synchronously by the crawler traction device. The core is driven and pulled to the cable core take-up frame. The cable core structure of the present invention is stable, round, small in outer diameter, high in optical fiber density per unit section, and high in utilization rate of pipeline resources.

Description

technical field [0001] The invention belongs to the technical field of optical cable manufacturing, and relates to a hybrid loose-tube stranded optical cable and a manufacturing method thereof. Background technique [0002] With the advent of the information age, the construction of communication networks is shifting from the backbone network with optical cables as the main transmission medium to the metropolitan area network and access network with optical cables as the main transmission medium, in order to meet the needs of the majority of users for voice, image and data, etc. The constant demands of the business. The communication network is the main carrier of information dissemination in the entire economic society in the future. It will not only change the way of information dissemination, but also bring fundamental changes to human life style and social development. However, in the construction of high-speed information network, a large number of optical fiber cables...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/44
CPCG02B6/443G02B6/4434G02B6/4479G02B6/4483G02B6/44384
Inventor 宋海燕张卫强王正刚张义军刘少锋刘振华马晓俊朱勇
Owner FURUKAWA ELECTRIC XIAN OPTICAL COMM
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