CN214669751U

CN214669751U - Nonmetal ant-proof overhead pipeline leading-in optical cable

Info

Publication number: CN214669751U
Application number: CN202120397831.2U
Authority: CN
Inventors: 陈丹宇; 张鑫元; 王宇亮; 孙伟; 林卫峰; 夏文奎; 黄强; 詹学龙
Original assignee: Hengtong Optic Electric Co Ltd
Current assignee: Hengtong Optic Electric Co Ltd
Priority date: 2021-02-23
Filing date: 2021-02-23
Publication date: 2021-11-09
Anticipated expiration: 2031-02-23

Abstract

The utility model discloses a nonmetal ant-proof overhead pipeline leading-in optical cable, which comprises a first protective layer and at least one optical fiber unit, wherein a tensile reinforcement is embedded in the body of the first protective layer; all optical fiber units contained in the drop cable are positioned in the first protective layer, each optical fiber unit comprises an optical fiber body and a tight-buffered layer wrapping the optical fiber body, and the tight-buffered layer is a nylon tight-buffered layer; and a gap between the optical fiber unit and the first sheath is filled with a water-blocking substance. The utility model discloses simple structure optimizes to it and promotes on the basis of current bundle form optical cable, adds tensile reinforcement to optimize the material on tight sleeve layer, thereby make the utility model discloses an optical cable can satisfy simultaneously that indoor wiring uses, the short distance is built on stilts and indoor to outdoor pipeline introduction, realizes the multi-purpose final purpose of a cable.

Description

Nonmetal ant-proof overhead pipeline leading-in optical cable

Technical Field

The utility model belongs to the technical field of the optical cable technique and specifically relates to a nonmetal ant-proof overhead pipeline introduces optical cable.

Background

Fiber optic cables are manufactured to meet optical, mechanical, or environmental performance specifications and utilize one or more optical fibers disposed in a covering jacket as the transmission medium and may be used individually or in groups as telecommunication cable assemblies.

With the improvement of living standard and the progress of information technology, optical cables are required to be laid in more and more places to expand the range of information transmission, and a multi-core beam-shaped optical cable is taken as one optical cable, as shown in fig. 1, the traditional multi-core beam-shaped optical cable cannot meet various complex working environments at the present stage and can only meet the working environment of-40 ℃ to 75 ℃ to the maximum extent, so that the optical cable has limited functions and single use and can only be used for indoor comprehensive wiring.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a nonmetal ant-proof aerial pipe leading-in optical cable to realize that a cable is multi-purpose.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a nonmetal ant-proof aerial pipe leading-in optical cable comprises a first protective layer and at least one optical fiber unit, wherein a tensile reinforcing piece is embedded in a body of the first protective layer; all optical fiber units contained in the drop cable are positioned in the first protective layer, each optical fiber unit comprises an optical fiber body and a tight-buffered layer wrapping the optical fiber body, and the tight-buffered layer is a nylon tight-buffered layer; and a gap between the optical fiber unit and the first sheath is filled with a water-blocking substance. Namely the utility model discloses a structure not only can be applicable to multicore beam form optical cable, can also be applicable to single core optical cable.

Preferably, the material of the nylon tight-buffered layer comprises PA 12. The tight sleeve material is designed to be PA12, and has strong temperature resistance and mechanical property.

Preferably, the material of the tensile reinforcement comprises FRP.

Preferably, the tensile reinforcement comprises at least two; when the number of the tensile strength members is two, the two tensile strength members are symmetrically arranged with respect to the center of the optical cable.

Preferably, the first protective layer is a low smoke zero halogen protective layer. Most of the network wire coating layer is made of polyethylene, polyvinyl chloride or thermoplastic polyurethane. When a fire occurs, the chlorine-containing plastics release toxic hydrogen chloride, and hydrochloric acid is generated if water is encountered. And the low-smoke halogen-free material does not release hydrogen halide or other acids in case of fire.

Preferably, the water-blocking material is a glass fiber yarn. The resin water absorption rate can be reduced due to the increase of the fiber, so that the resin can work under high temperature and high humidity, the affinity of the nylon and the glass fiber is very good, and after the water-blocking glass fiber yarn is filled, the water-blocking function is realized, and the tensile strength of the nylon (PA) can be improved.

Preferably, the cable further comprises a second protective layer, wherein the second protective layer covers the first protective layer and is a nylon protective layer.

Preferably, the material of the second sheath comprises PA 6. The purpose of protection against rodents, insects and birds can be achieved by extruding a layer of PA6 outside the first protective layer.

Preferably, the thickness of the second protective layer is 0.2mm to 5 mm.

Preferably, the thickness of the second protective layer is 0.5mm to 5 mm. The protective layer made of PA6 material can completely prevent termite from invading optical cable product when the thickness reaches 0.2mm, and can effectively prevent mouse from invading optical cable when the thickness reaches more than 0.5 mm. The utility model has the advantages of it is following:

1. the utility model discloses simple structure optimizes to it and promotes on the basis of current bundle form optical cable, adds tensile reinforcement to optimize the material on tight sleeve layer, thereby make the utility model discloses an optical cable can satisfy simultaneously that indoor wiring uses, the short distance is built on stilts and indoor to outdoor pipeline introduction, realizes the multi-purpose final purpose of a cable.

2. The utility model discloses an optical cable, the material on tight jacket layer includes PA12, and the material of second sheath includes PA6, and first sheath is low smoke and zero halogen sheath, and the selection of inseparable structural design and material makes the optical cable can satisfy under-45 ℃ -85 ℃ of operating temperature, and the decay variable quantity is less than or equal to 0.2 dbm.

3. The utility model discloses an optical cable, nylon tight jacket layer mainly adopt PA12, and temperature resistance and mechanical properties are stronger.

4. The utility model discloses an optical cable, second sheath mainly adopt PA6, can the protection against rodents, and the protection against insects stings and birds.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic view of a conventional optical cable structure.

Fig. 2 is a schematic view of the optical cable structure of the present invention.

In the figures, the various reference numbers are:

1-second sheath, 2-first sheath, 3-optical fiber body, 4-nylon tight sleeve layer, 5-water-blocking object and 6-tensile reinforcing element.

Detailed Description

It will be understood that when an element is referred to as being "disposed on," "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured" to, or "fixedly coupled" to another element, it can be removably secured or non-removably secured to the other element. When an element is referred to as being "connected," "pivotally connected," to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like are used for illustrative purposes only and are not meant to be the only real-time.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the present invention, the terms "first", "second", "third", and the like are used for distinguishing names, rather than representing specific numbers and orders.

As shown in fig. 2, the nonmetal ant-proof aerial conduit lead-in optical cable comprises a second protective layer 1, a first protective layer 2 and a plurality of optical fiber units, wherein the second protective layer 1 covers the first protective layer 2, and a tensile reinforcement member 6 is embedded in the body of the first protective layer 2 to improve the mechanical property of the optical cable; all optical fiber units contained in the drop cable are positioned in the first protective layer 2, each optical fiber unit comprises an optical fiber body 3 and a tight-buffered layer coating the optical fiber body, and the tight-buffered layer is a nylon tight-buffered layer 4; the gap between the optical fiber unit and the first sheath 2 is filled with a water-blocking material 5 to keep the inner space of the first sheath 2 dry.

In this embodiment, the nylon tight-buffered layer 4 is made of a material PA12, and compared with the existing materials PS, PE, PP, and PO, the PA material does not soften gradually with the rise of the heating temperature, but softens in a narrow temperature range close to the melting point, so that the temperature resistance is higher, the optical cable is more suitable for being laid, and the working temperature is more selective. For the variety selection of PA, PA12 is a good electrical insulator and has good impact resistance and mechanical and chemical stability, and compared with PA11, the PA12 has higher rigidity and strength under the condition that the low-temperature impact resistance can be met, so PA12 is the optimal solution disclosed in the embodiment.

The second sheath 1 is made of PA 6. The second sheath layer 1 made of PA6 material has higher impact strength rate and relatively better flexibility, thermoplasticity, toughness and durability. Compared with PA66, PA6 is more suitable for light load conditions of the optical cable, and has better abrasion resistance, self-lubricating property and solvent resistance. And the protective layer made of PA6 material can completely prevent termite from invading the optical cable product when the thickness reaches 0.2mm, and can effectively prevent mouse from invading the optical cable when the thickness reaches more than 0.5 mm. Therefore, in this embodiment, the thickness of the second sheath 1 is preferably 0.5mm, 1mm, 2mm, 3mm, 4mm and 5mm, and the user can determine the final thickness according to the demand, so as to realize that the optical cable disclosed in this embodiment can also prevent rats, insects and birds on the premise that the cross-sectional area of the optical cable is not too large.

In this embodiment, the tensile reinforcement 6 is preferably an FRP reinforcement, and the FRP reinforcements are embedded in the body of the first sheath 2 and at least two FRP reinforcements are provided, and when there are two FRP reinforcements, the two FRP reinforcements are symmetrically provided with respect to the center of the optical cable to sufficiently exert their performances, and when there are more than two FRP reinforcements, that is, three or more FRP reinforcements are provided, the plurality of FRP reinforcements are arranged in an array with reference to the center of the optical cable.

In this embodiment, the water-blocking material 5 is preferably glass fiber yarn, which can reduce the water absorption of the resin due to the increase of the fiber, so that the resin can work under high temperature and high humidity, and the affinity between nylon and glass fiber is very good, so that after the glass fiber yarn is filled, the water-blocking function is achieved, and simultaneously, the tensile strength of nylon (PA) can be improved, thereby the disclosed structures in this embodiment complement each other to obtain the maximum performance improvement.

In this embodiment, the first protective layer 2 adopts the low smoke and zero halogen protective layer, through the nylon tight jacket layer 4 adopts PA12, the second protective layer 1 adopts PA6, the mutual inseparable structure of low smoke and zero halogen protective layer makes the optical cable disclosed in this embodiment possess stronger temperature resistance, can satisfy under-45 ℃ -85 ℃ operating temperature, the attenuation variation is less than or equal to 0.2dm, and the embedded FRP reinforcement of low smoke and zero halogen protective layer makes the optical cable allow short-term pulling force to reach 600N, traditional bundle optical cable promptly, the optical cable disclosed in this case has all obtained the promotion in temperature resistance and mechanical properties.

In the embodiment, the low-smoke halogen-free sheath has a compact structure, so that the optical cable has excellent water resistance after the water-resistant glass fiber yarn is added, and the second sheath is arranged outside the low-smoke halogen-free sheath in an extrusion manner and wraps the low-smoke halogen-free sheath, so that the water resistance of the optical cable is further expanded, and the water seepage test requirement of IEC60794-1-2-F5B is met.

Traditional water-blocking layer adopts aramid fiber yarn usually, and the optical cable disclosed in this embodiment has not only saved aramid fiber yarn's use, still makes the optical cable possess the function of built on stilts use and indoor wiring direct introduction to the pipeline, only is applicable to indoor wiring relatively the tradition, and the optical cable disclosed in this embodiment has realized that a cable is multi-purpose.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. The nonmetal ant-proof aerial pipeline leading-in optical cable is characterized by comprising a first protective layer and at least one optical fiber unit, wherein a tensile reinforcing piece is embedded in a body of the first protective layer; all optical fiber units contained in the drop cable are positioned in the first protective layer, each optical fiber unit comprises an optical fiber body and a tight-buffered layer wrapping the optical fiber body, and the tight-buffered layer is a nylon tight-buffered layer; and a gap between the optical fiber unit and the first sheath is filled with a water-blocking substance.

2. The non-metallic ant protected aerial conduit drop cable of claim 1, wherein the material of said nylon tight-buffered layer comprises PA 12.

3. The non-metallic ant-protected overhead conduit drop cable of claim 1, wherein the material of said tensile strength member comprises FRP.

4. The non-metallic ant-protected aerial conduit drop cable of claim 1, wherein said tensile strength member comprises at least two; when the number of the tensile strength members is two, the two tensile strength members are symmetrically arranged with respect to the center of the optical cable.

5. The non-metallic ant-protected aerial pipe drop cable according to claim 1, wherein said first protective layer is a low smoke zero halogen protective layer.

6. The non-metallic ant protected aerial pipe drop cable of claim 1, wherein said water barrier is fiberglass yarn.

7. The non-metallic ant-protected aerial conduit drop cable according to any one of claims 1 to 6, further comprising a second covering layer, said second covering layer covering said first covering layer, said second covering layer being a nylon covering layer.

8. The non-metallic ant protected aerial conduit drop cable of claim 7, wherein the material of said second sheath comprises PA 6.

9. The non-metallic ant-protected aerial conduit drop cable according to claim 7, wherein the thickness of the second protective layer is 0.2mm to 5 mm.

10. The non-metallic ant-protected aerial conduit drop cable according to claim 9, wherein the second protective layer has a thickness of 0.5mm to 5 mm.