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A kind of cured cladding stranded optical cable and its preparation method

A layer-twisted, optical cable technology, applied in the field of optical communication, can solve the problems of pulling and breaking the optical cable, removing the sheath, and unable to add armor, so as to avoid puncturing the casing and have a wide range of applications.

Active Publication Date: 2022-04-22
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a cured bundled optical cable and its preparation method. Turnback, thus solving the technical problem that the existing SZ-layer stranded optical cable can not be equipped with armor due to the sheath stripping or even breaking the cable caused by the twisting of the SZ turnback caused by canceling the binding yarn

Method used

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  • A kind of cured cladding stranded optical cable and its preparation method
  • A kind of cured cladding stranded optical cable and its preparation method
  • A kind of cured cladding stranded optical cable and its preparation method

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preparation example Construction

[0041] The preparation method of the cured cladding stranded optical cable provided by the invention comprises the following steps:

[0042] Along the direction of the production line, after the light unit of the loose tube is released, the SZ stranding is carried out along the central reinforcing core through the stranding table. After stranding, the resin is coated on the surface of the cable core through the coating mold, and the ultraviolet light is irradiated to induce curing into the described Encapsulating strips to form the loose tube optical unit bundle; the twisted and coated resin is specifically:

[0043]Coating is carried out using a coating die which performs continuous or discontinuous coating at the turns of the SZ strands.

[0044] For the encapsulation strips of the aforementioned three designs, they are specifically formed according to the following methods:

[0045] The coating die has the same number of resin extrusion ports as the outermost loose tubes, ...

Embodiment 1

[0051] The solidified cladding stranded optical cable provided in this embodiment has a schematic diagram of the structure of the SZ stranded turnback of the loose tube optical unit bundle as shown in figure 1 As shown, its cross-sectional structural schematic diagram is shown in figure 2 Shown: a plurality of loose tube optical units 2 are SZ stranded around the central reinforcing core 3, and the surface is coated with resin to cure the encapsulation strip 1, and the encapsulation strip is located between adjacent loose tubes, along the groove between the loose tubes SZ helical shape is formed to form a loose tube optical unit bundle. The loose tube is extruded from PBT coated with multiple optical fibers and water-blocking material, and the central reinforcing core is an FRP rod. A number of water-blocking yarns 4 are wound on the surface of the FRP rod to ensure the water seepage effect of the cable core. A layer of HDPE sheath 6 is extruded outside the loose tube optic...

Embodiment 2

[0060] The solidified cladding stranded optical cable provided in this embodiment has a schematic diagram of the structure of the SZ stranded turnback of the loose tube optical unit bundle as shown in image 3 As shown, its cross-sectional structural schematic diagram is shown in Figure 4 As shown: a plurality of tube optical units 2 are SZ stranded around the central strengthening core 3, and resin is coated on the surface to cure the encapsulation strip 1, and the encapsulation strip 1 extends along the axial direction of the optical cable to form a loose tube optical unit bundle. The loose tube is extruded from PBT coated with multiple optical fibers and water-blocking material, and the central reinforcing core is an FRP rod. A number of water-blocking yarns 4 are wound on the surface of the FRP rod to ensure the water seepage effect of the cable core. A layer of HDPE sheath 6 is extruded outside the loose tube optical unit bundle to form the cured sheath stranded optical...

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Abstract

The invention discloses a cured cladding stranded optical cable and a preparation method thereof. The cured bundle layer twisted optical cable includes a loose tube optical unit bundle and an outer sheath; the loose tube optical unit bundle includes a plurality of SZ twisted loose tube optical units, and the outer side has a Encapsulating strips formed by curing resin and distributed circumferentially on the cross-section of the optical cable. The preparation method includes steps: along the direction of the production line, after the light unit of the loose tube is released, the stranding table is used to perform SZ stranding along the periphery of the central reinforcement, and after stranding, the resin is coated, and the encapsulation strip is cured by photocuring, forming the loose tube optical unit bundle; extruding a sheath material outside the loose tube optical unit bundle to form an outer covering sheath. The cured bundle layer stranded optical cable provided by the present invention adopts the encapsulation strip formed by curing the cured resin to replace the binding yarn, which will not produce the binding marks of the binding yarn, avoiding damage to the sleeve, and will hardly increase the diameter of the optical cable at the same time. The stability of the loose tube at the SZ turnback.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and more specifically relates to a curing bundled optical cable and a preparation method thereof. Background technique [0002] With the development of communication capacity, optical cables with high fiber density have gradually become the development trend of the industry. In order to increase the optical fiber density, reducing the wall thickness of the loose tube loaded with optical fiber is one of the effective methods, but reducing the wall thickness will cause the tube to be damaged when the yarn is tied, and the problem of puncture marks will appear. Therefore, canceling the binding yarn can prevent the sleeve from being scratched due to the excessive binding yarn, so as to avoid breaking the optical fiber and affecting the transmission performance when the sleeve is bent and left. [0003] CN110333585A discloses a twisted fiber optic cable without a binding layer and its m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/44
CPCG02B6/443G02B6/4432G02B6/4479G02B6/4486
Inventor 胡海峰刘宏超阮云芳杨向荣祁林郑磊
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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