CN112363286A - Nonmetal armored three-sheath self-supporting rat-proof optical cable and preparation process thereof - Google Patents

Nonmetal armored three-sheath self-supporting rat-proof optical cable and preparation process thereof Download PDF

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Publication number
CN112363286A
CN112363286A CN202011255001.2A CN202011255001A CN112363286A CN 112363286 A CN112363286 A CN 112363286A CN 202011255001 A CN202011255001 A CN 202011255001A CN 112363286 A CN112363286 A CN 112363286A
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China
Prior art keywords
sheath
optical cable
supporting
rat
cable
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Pending
Application number
CN202011255001.2A
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Chinese (zh)
Inventor
王胜楠
张小山
乐海音
黄星宇
薄双商
李智临
张萍
钱晓倩
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Hengtong Optic Electric Co Ltd
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Hengtong Optic Electric Co Ltd
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Application filed by Hengtong Optic Electric Co Ltd filed Critical Hengtong Optic Electric Co Ltd
Priority to CN202011255001.2A priority Critical patent/CN112363286A/en
Publication of CN112363286A publication Critical patent/CN112363286A/en
Priority to PCT/CN2021/129683 priority patent/WO2022100591A1/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401Optical cables
    • G02B6/4429Means specially adapted for strengthening or protecting the cables
    • G02B6/443Protective covering
    • G02B6/4432Protective covering with fibre reinforcements
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401Optical cables
    • G02B6/4429Means specially adapted for strengthening or protecting the cables
    • G02B6/443Protective covering
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4479Manufacturing methods of optical cables
    • G02B6/4486Protective covering

Abstract

The invention discloses a non-metal armored three-sheath self-supporting rat-proof optical cable which comprises a cable core, a sheath layer, a force-bearing element and a rat-proof layer, wherein the sheath layer comprises an inner sheath, a middle sheath and an outer sheath, the inner sheath, the middle sheath and the outer sheath are sequentially arranged on the outer side of the cable core, the force-bearing element is arranged between the inner sheath and the middle sheath, and the rat-proof layer is arranged between the middle sheath and the outer sheath. The self-supporting optical cable is simple and reasonable in structural design, adopts a structure of three layers of non-metal sheaths, and on one hand, a force bearing element is arranged between the inner sheath and the middle sheath, so that the tensile strength of the self-supporting optical cable is obviously enhanced; on the other hand, a rat-proof layer is arranged between the middle sheath and the outer sheath, so that a better rat-proof effect can be achieved. The preparation process is simple to operate, the process cost is low, the optical cable prepared by the method has the advantages of remarkable tensile property and bending property, light weight, simple construction operation and easiness in laying.

Description

Nonmetal armored three-sheath self-supporting rat-proof optical cable and preparation process thereof
Technical Field
The invention relates to the technical field of optical cables, in particular to a non-metal armored three-sheath self-supporting rat-proof optical cable and a preparation process thereof.
Background
The optical fiber transmission communication system is one of the most commonly used transmission systems in the current communication system, in recent years, with the rapid development of a power grid, the number of optical cables and nodes of a substation is rapidly increased, and the optical communication technology is widely applied to a power system. The ordinary aerial optical cable is short in construction period, good in mechanical, moisture-proof and waterproof performances, capable of adapting to different environments and convenient to maintain, so that the ordinary aerial optical cable is very common in application. However, in recent years, the phenomenon that a common aerial optical cable is bitten and broken by rats is increased, great threat is caused to the safe and stable operation of a power communication network, and finally the optical cable is damaged and scrapped to lose use value.
At present, the traditional optical cable rat-proof type usually adopts a chemical rat-proof method and a physical rat-proof method, wherein the common chemical rat-proof method is usually a method of adding some chemical substances with strong stimulation into a sheath material to prevent the optical cable from being bitten and damaged by rats, but the hidden troubles of chemical reagent volatilization, invalidation and environmental pollution exist in the actual use process; in addition, the common physical method is to add a murine-nondamadable hard material into the optical cable to ensure that the inner layer of the optical cable is not damaged. For example, although the metal armor cable can prevent rodents from biting to a certain extent through the metal protective layer, the bending performance of the cable is reduced to a certain extent through the hard metal armor layer, and the laying difficulty of the cable is large. And according to research, once the metal armor layer of the optical cable is bitten, the exposed metal layer is easy to generate chemical corrosion reaction with the external environment, so that the optical cable is completely deprived of rat-proof capability.
Disclosure of Invention
In order to solve the technical problems, the invention provides a non-metal armored three-sheath self-supporting rat-proof optical cable which comprises a cable core and a central reinforcing piece, wherein the cable core comprises an optical fiber, a loose tube, a filling fiber paste and the central reinforcing piece, the optical fiber and the filling fiber paste are arranged in the loose tube, and the loose tube surrounds the central reinforcing piece to form the cable core; including restrictive coating, load element and protection against rodents layer, the restrictive coating includes inner sheath, well sheath and oversheath, the outside of cable core is equipped with inner sheath, well sheath and oversheath in proper order, be equipped with the load element between inner sheath and the well sheath, be equipped with the protection against rodents layer between well sheath and the oversheath.
Technical scheme more than adopting, the load element is aramid yarn, and stranded aramid yarn winds and wraps between inner sheath and well sheath.
By adopting the technical scheme, the rat-proof layer is made of glass fiber yarns, and a plurality of strands of glass fiber yarns are wound and wrapped between the middle sheath and the outer sheath.
By adopting the technical scheme, the inner sheath, the middle sheath and the outer sheath are all made of PE cable materials.
By adopting the technical scheme, the loose tube is a polybutylene terephthalate loose tube.
By adopting the technical scheme, the cable core also comprises a water-blocking filler, and the gap in the cable core is filled with the water-blocking filler.
The invention also aims to provide a preparation process of the nonmetal armored three-sheath self-supporting ratproof optical cable, which comprises the following steps:
performing coloring and attenuation tests on the optical fiber;
wrapping a loose tube outside the qualified optical fiber, and filling fiber paste in the loose tube;
the loose tube is twisted around the central reinforcement by SZ to form a cable core, and a gap in the cable core is filled with a water-blocking filler;
an inner sheath is formed on the outer side of the cable core through extrusion molding, and a bearing element is wrapped on the outer side of the inner sheath;
the outer side of the bearing element is formed with a middle sheath by extrusion molding, and the outer side of the middle sheath is wrapped with a rat-proof layer;
an outer sheath is formed on the outer side of the rat-proof layer in an extrusion molding mode.
Technical scheme more than adopting, the load element is aramid yarn, and stranded aramid yarn winds and wraps between inner sheath and well sheath.
By adopting the technical scheme, the rat-proof layer is made of glass fiber yarns, and a plurality of strands of glass fiber yarns are wound and wrapped between the middle sheath and the outer sheath.
By adopting the technical scheme, the inner sheath, the middle sheath and the outer sheath are all made of PE cable materials.
The invention has the beneficial effects that: the self-supporting optical cable is simple and reasonable in structural design, adopts a structure of three layers of non-metal sheaths, and on one hand, a force bearing element is arranged between the inner sheath and the middle sheath, so that the tensile strength of the self-supporting optical cable is obviously enhanced; on the other hand, a rat-proof layer is arranged between the middle sheath and the outer sheath, so that a better rat-proof effect can be achieved. The preparation process is simple to operate, the process cost is low, the optical cable prepared by the method has the advantages of remarkable tensile property and bending property, light weight, simple construction operation and easiness in laying.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
The reference numbers in the figures illustrate: 1. an inner sheath; 2. loosening the sleeve; 3. filling fiber paste; 4. an optical fiber; 5. a central reinforcement; 6. a force-bearing element; 7. a water-blocking filler; 8. a middle sheath; 9. a rat-proof layer; 10. an outer sheath.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Example 1
Referring to fig. 1, embodiment 1 of the present invention provides a non-metal armored three-jacket self-supporting rat-proof optical cable, the structure of the optical cable includes a cable core, a jacket layer, a force-bearing element 6 and a rat-proof layer 9, the jacket layer includes an inner jacket 1, a middle jacket 8 and an outer jacket 10, the inner jacket 1, the middle jacket 8 and the outer jacket 10 are sequentially disposed outside the cable core, the force-bearing element 6 is disposed between the inner jacket 1 and the middle jacket 8, and the rat-proof layer 9 is disposed between the middle jacket 8 and the outer jacket 10. The optical cable is designed into a three-layer sheath structure, on one hand, a force bearing element 6 is arranged between the inner sheath 1 and the middle sheath 8, and the tensile strength of the self-supporting optical cable is obviously enhanced; on the other hand, a rat-proof layer 9 is arranged between the middle sheath 8 and the outer sheath 10, so that a better rat-proof effect can be achieved.
Specifically, bearing element 6 is aramid yarn, and stranded aramid yarn is around wrapping between inner sheath 1 and well sheath 8. For example, a plurality of strands of ultra-high modulus aramid yarns are wound between the inner sheath 1 and the middle sheath 8, so that the tensile property of the self-supporting optical cable is enhanced, and the tensile property of the self-supporting optical cable can be improved; and the ratproof layer 9 is made of glass fiber yarns, and a plurality of strands of glass fiber yarns are wound between the middle sheath 8 and the outer sheath 10, so that on one hand, the glass fiber yarns can further enhance the tensile strength of the optical cable, and on the other hand, the ratproof performance can be effectively achieved.
And the cable core comprises an optical fiber 4, a loose tube 2, a filled fiber paste 3 and a central reinforcing part 5, wherein the optical fiber 4 and the filled fiber paste 3 are arranged in the loose tube 2, and the loose tube 2 surrounds the central reinforcing part 5 to form the cable core. For example, the loose tube 2 is a polybutylene terephthalate loose tube 2, a colored optical fiber 4 and a filling fiber paste 3 are arranged in the polybutylene terephthalate loose tube 2, the polybutylene terephthalate loose tube 2 is twisted around a center reinforcement 5(FRP) by SZ to form a (1+ N) structured cable core, and a gap in the cable core is filled with a water-blocking filler 7.
Preferably, the inner sheath 1, the middle sheath 8 and the outer sheath 10 are all made of PE cable material. For example, the inner sheath 1 and the middle sheath 8 are made of a high polymer PE sheath material, and the outer sheath 10 is made of a high polymer tracking-resistant PE sheath material.
Example 2
The embodiment 2 of the invention provides a preparation process of a non-metal armored three-sheath self-supporting ratproof optical cable, which comprises the following steps:
and S101, performing coloring and attenuation tests on the optical fiber 4.
Specifically, the optical fiber 4 for general communication is colored by using a coloring mold, after the coloring is completed, the attenuation test is performed on each disc of the optical fiber 4, and the optical fiber 4 which is qualified in the test is put into the next production process.
And S102, wrapping a loose tube 2 outside the qualified optical fiber 4, and filling the loose tube 2 with filling fiber paste 3.
Specifically, the loose tube 2 is preferably a polybutylene terephthalate loose tube 2, a colored optical fiber 4 and a filling fiber paste 3 are arranged in the polybutylene terephthalate loose tube 2, after the loose tube is manufactured, the wall thickness and the surplus length of the loose tube 2 need to be checked, and the loose tube is put into the next process for production after the check is qualified.
And S103, forming a cable core around the central reinforcing piece 5 through SZ twisting, and filling water-blocking fillers 7 in gaps in the cable core.
Specifically, the central reinforcement 5 adopts a non-metal reinforcement, the polybutylene terephthalate loose tube 2 surrounds the central reinforcement 5(FRP) and forms a cable core with a (1+ N) structure through SZ twisting, a water-blocking filler 7 for playing a strong water-blocking effect is filled in a gap in the cable core, and the cable winding must be ensured to be tidy when the cable core is cabled.
And S104, forming an inner sheath 1 on the outer side of the cable core in an extrusion molding manner, and wrapping a force bearing element 6 on the outer side of the inner sheath 1.
Specifically, bearing element 6 is aramid yarn, and the aramid yarn of the super high modulus of stranded winds the outside of covering at inner sheath 1 to the tensile strength of reinforcing self-supporting optical cable, wherein inner sheath 1 adopts polymer PE sheath material.
S105, extruding and forming a middle sheath 8 on the outer side of the force bearing element 6, and wrapping a rat-proof layer 9 on the outer side of the middle sheath 8.
Specifically, before the middle sheath 8 is extruded, the paying-off tension of the high-strength aramid yarn needs to be corrected to ensure the close combination between the aramid yarn and the inner sheath 1, and then the middle sheath 8 is formed on the outer side of the bearing element 6 through extrusion molding, wherein the middle sheath 8 is made of a high-molecular PE sheath material; then the outer side of the middle sheath 8 is wrapped with a rat-proof layer 9, the rat-proof layer 9 is made of glass fiber yarns, and a plurality of strands of glass fiber yarns are wrapped on the outer side of the middle sheath 8, so that on one hand, the glass fiber yarns can further enhance the tensile strength of the optical cable, on the other hand, the effective rat-proof performance can be achieved,
and S106, extruding and forming the outer sheath 10 outside the rat-proof layer 9.
Specifically, before extruding the outer sheath 10, the tension matching of each glass fiber yarn needs to be satisfied, the orderly arrangement of the mold and the glass fiber yarn is adjusted to ensure that the optical cable is qualified in water seepage, and the outer sheath 10 is made of a high-molecular and tracking-resistant PE sheath material.
The preparation process is simple to operate and low in cost, and the prepared optical cable has remarkable tensile property and bending property, light weight, simple construction operation and easy laying.
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. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.

Claims (10)

1. A non-metal armored three-sheath self-supporting rat-proof optical cable comprises a cable core and a central reinforcing piece, wherein the cable core comprises optical fibers, a loose tube, filled fiber paste and the central reinforcing piece, the optical fibers and the filled fiber paste are arranged in the loose tube, and the loose tube surrounds the central reinforcing piece to form the cable core; the method is characterized in that:
including restrictive coating, load element and protection against rodents layer, the restrictive coating includes inner sheath, well sheath and oversheath, the outside of cable core is equipped with inner sheath, well sheath and oversheath in proper order, be equipped with the load element between inner sheath and the well sheath, be equipped with the protection against rodents layer between well sheath and the oversheath.
2. The non-metallic armored three-jacket self-supporting ratproof optical cable of claim 1, wherein: the bearing element is aramid yarn, and multiple strands of aramid yarn are wrapped between the inner sheath and the middle sheath.
3. The non-metallic armored three-jacket self-supporting ratproof optical cable of claim 1, wherein: the rat-proof layer is made of glass fiber yarns, and a plurality of strands of glass fiber yarns are wound and wrapped between the middle protective sleeve and the outer protective sleeve.
4. The non-metallic armored three-jacket self-supporting ratproof optical cable of claim 1, wherein: the inner sheath, the middle sheath and the outer sheath are all made of PE cable materials.
5. The non-metallic armored three-jacket self-supporting ratproof optical cable of claim 1, wherein: the loose tube is a polybutylene terephthalate loose tube.
6. The non-metallic armored three-jacket self-supporting ratproof optical cable of claim 1, wherein: the cable core is characterized by further comprising a water-blocking filler, and the gaps in the cable core are filled with the water-blocking filler.
7. A process for preparing a non-metal armored three-jacket self-supporting ratproof optical cable according to any one of claims 1 to 6, wherein: the method comprises the following steps:
performing coloring and attenuation tests on the optical fiber;
wrapping a loose tube outside the qualified optical fiber, and filling fiber paste in the loose tube;
the loose tube is twisted around the central reinforcement by SZ to form a cable core, and a gap in the cable core is filled with a water-blocking filler;
an inner sheath is formed on the outer side of the cable core through extrusion molding, and a bearing element is wrapped on the outer side of the inner sheath;
the outer side of the bearing element is formed with a middle sheath by extrusion molding, and the outer side of the middle sheath is wrapped with a rat-proof layer;
an outer sheath is formed on the outer side of the rat-proof layer in an extrusion molding mode.
8. The process for preparing the non-metallic armored three-jacket self-supporting ratproof optical cable according to claim 7, wherein: the bearing element is aramid yarn, and multiple strands of aramid yarn are wrapped between the inner sheath and the middle sheath.
9. The process for preparing the non-metallic armored three-jacket self-supporting ratproof optical cable according to claim 7, wherein: the rat-proof layer is made of glass fiber yarns, and a plurality of strands of glass fiber yarns are wound and wrapped between the middle protective sleeve and the outer protective sleeve.
10. The process for preparing the non-metallic armored three-jacket self-supporting ratproof optical cable according to claim 7, wherein: the inner sheath, the middle sheath and the outer sheath are all made of PE cable materials.
CN202011255001.2A 2020-11-11 2020-11-11 Nonmetal armored three-sheath self-supporting rat-proof optical cable and preparation process thereof Pending CN112363286A (en)

Priority Applications (2)

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CN202011255001.2A CN112363286A (en) 2020-11-11 2020-11-11 Nonmetal armored three-sheath self-supporting rat-proof optical cable and preparation process thereof
PCT/CN2021/129683 WO2022100591A1 (en) 2020-11-11 2021-11-10 Non-metallic armored three-sheath self-supporting rodent-proof optical cable and manufacturing process

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CN202011255001.2A CN112363286A (en) 2020-11-11 2020-11-11 Nonmetal armored three-sheath self-supporting rat-proof optical cable and preparation process thereof

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CN114019639A (en) * 2022-01-06 2022-02-08 长飞光纤光缆股份有限公司 Bulletproof optical cable and preparation method thereof
WO2022100591A1 (en) * 2020-11-11 2022-05-19 江苏亨通光电股份有限公司 Non-metallic armored three-sheath self-supporting rodent-proof optical cable and manufacturing process

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CN116125613B (en) * 2023-03-14 2023-07-18 宏安集团有限公司 Preparation method of novel nonmetal optical fiber ribbon optical cable
CN116047690B (en) * 2023-03-28 2023-07-07 江苏中天科技股份有限公司 Optical cable and method for manufacturing the same

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