WO2022100591A1 - 非金属铠装三护套自承式防鼠光缆及制备工艺 - Google Patents

非金属铠装三护套自承式防鼠光缆及制备工艺 Download PDF

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WO2022100591A1
WO2022100591A1 PCT/CN2021/129683 CN2021129683W WO2022100591A1 WO 2022100591 A1 WO2022100591 A1 WO 2022100591A1 CN 2021129683 W CN2021129683 W CN 2021129683W WO 2022100591 A1 WO2022100591 A1 WO 2022100591A1
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Prior art keywords
sheath
rodent
supporting
proof
optical cable
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PCT/CN2021/129683
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English (en)
French (fr)
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韩宇峰
张小山
沈洪芬
孙丽华
薄双商
梁文博
张萍
钱晓倩
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江苏亨通光电股份有限公司
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Publication of WO2022100591A1 publication Critical patent/WO2022100591A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/443—Protective covering
    • G02B6/4432—Protective covering with fibre reinforcements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/443—Protective covering
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4479—Manufacturing methods of optical cables
    • G02B6/4486—Protective covering

Definitions

  • the invention relates to the technical field of optical cables, in particular to a non-metal armored three-sheath self-supporting rodent-proof optical cable and a preparation process.
  • Optical fiber transmission communication system is one of the most commonly used transmission systems in current communication systems.
  • the number of optical cables and substation nodes has grown rapidly, and optical communication technology has been widely used in power systems. Due to the short construction period of ordinary overhead optical cables, good mechanical and moisture-proof, waterproof performance, can adapt to different environments, and easy maintenance, the application of ordinary overhead optical cables is very common.
  • the phenomenon of ordinary overhead optical cables being bitten by rodents has also increased, posing a great threat to the safe and stable operation of the power communication network, and finally causing the optical cables to be damaged, scrapped, and lose their use value.
  • the traditional anti-rodent type of optical cable often adopts chemical anti-rodent method and physical anti-rodent method, among which the usual chemical anti-rodent method often adds some strongly stimulating chemical substances to the sheath material to prevent the optical cable from being bitten by rodents
  • the usual physical method refers to adding hard materials that cannot be destroyed by rodents in the optical cable to ensure that the inner layer of the optical cable is not damaged.
  • metal armored optical cable although the metal protective layer can prevent rodents from biting to a certain extent, but this hard metal armored layer also reduces the bending performance of the optical cable to a certain extent, making it more difficult to lay. .
  • the exposed metal layer is very easy to have chemical corrosion reaction with the external environment, resulting in the complete loss of the anti-rodent ability to the optical cable.
  • one object of the present invention is to provide a non-metallic armored three-sheath self-supporting rodent-proof optical cable, comprising a cable core and a central strength member, the cable core including an optical fiber, a loose tube, a filling Fiber paste and central reinforcement, the loose tube is provided with optical fibers and filled fiber paste, and the loose tube surrounds the central reinforcement to form a cable core; it includes a sheath layer, a load-bearing element and an anti-rat layer, and the sheath layer includes an inner protection layer.
  • a jacket, a middle jacket and an outer jacket, the outer side of the cable core is sequentially provided with an inner jacket, a middle jacket and an outer jacket, a load-bearing element is arranged between the inner jacket and the middle jacket, and the An anti-rat layer is arranged between the middle sheath and the outer sheath.
  • the load-bearing element is aramid yarn, and the multi-strand aramid yarn is wrapped between the inner sheath and the middle sheath.
  • the rodent-proof layer is glass fiber yarn, and multiple strands of glass fiber yarn are wrapped between the middle sheath and the outer sheath.
  • the inner sheath, the middle sheath and the outer sheath are all PE cable materials.
  • the loose tube is a polybutylene terephthalate loose tube.
  • a water blocking filler is also included, and the gap in the cable core is filled with the water blocking filler.
  • Another object of the present invention is to provide a preparation process of a non-metallic armored three-sheath self-supporting rodent-proof optical cable, including the following contents:
  • the loose tube is wrapped outside the qualified optical fiber, and the loose tube is filled with filling fiber paste;
  • the loose tube surrounds the central strength member to form a cable core by SZ twisting, and the gap in the cable core is filled with a water blocking filler;
  • the outer side of the cable core is extruded to form an inner sheath, and the outer side of the inner sheath is wrapped with a bearing element;
  • the outer side of the load-bearing element is extruded to form a middle sheath, and an anti-rat layer is wrapped around the outer side of the middle sheath;
  • An outer sheath is formed by extrusion molding on the outside of the anti-rat layer.
  • the load-bearing element is aramid yarn, and the multi-strand aramid yarn is wrapped between the inner sheath and the middle sheath.
  • the rodent-proof layer is glass fiber yarn, and multiple strands of glass fiber yarn are wrapped between the middle sheath and the outer sheath.
  • the inner sheath, the middle sheath and the outer sheath are all PE cable materials.
  • the structure design of the present invention is simple and reasonable, and the structure of the three-layer non-metallic sheath is adopted.
  • a rat-proof layer is arranged between the middle sheath and the outer sheath, which can achieve a better rat-proof effect.
  • the preparation process is simple in operation and low in process cost, and the optical cable prepared by the invention has remarkable tensile and bending properties, is light in weight, simple in construction and operation, and easy to lay.
  • FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.
  • Embodiment 1 of the present invention provides a non-metallic armored three-sheath self-supporting rodent-proof optical cable.
  • the structure of the optical cable includes a cable core, a sheath layer, a load-bearing element 6 and a rodent-proof layer 9.
  • the sheath layer includes an inner sheath 1, a middle sheath 8 and an outer sheath 10.
  • the outer side of the cable core is sequentially provided with an inner sheath 1, a middle sheath 8 and an outer sheath 10.
  • the inner sheath 1 and the middle sheath 8 A load-bearing element 6 is arranged therebetween, and a rat-proof layer 9 is arranged between the middle sheath 8 and the outer sheath 10 .
  • the optical cable of the present invention is designed as a three-layer sheath structure.
  • a load-bearing element 6 is arranged between the inner sheath 1 and the middle sheath 8, which significantly enhances the tensile resistance of the self-supporting optical cable;
  • An anti-rat layer 9 is arranged between the sheath 8 and the outer sheath 10, which can achieve a better anti-rat effect.
  • the load-bearing element 6 is an aramid yarn, and multiple aramid yarns are wrapped between the inner sheath 1 and the middle sheath 8 .
  • multiple strands of ultra-high-modulus aramid yarns are wrapped between the inner sheath 1 and the middle sheath 8 to enhance the tensile performance of the self-supporting optical cable, which can improve the tensile performance of the self-supporting optical cable.
  • the anti-rat layer 9 which is a glass fiber yarn, and the multi-strand glass fiber yarn is wrapped between the middle sheath 8 and the outer sheath 10.
  • the glass fiber yarn can further enhance the tensile strength of the optical cable, and on the other hand Effective anti-rodent performance can be achieved.
  • the cable core includes an optical fiber 4, a loose tube 2, a filling fiber paste 3 and a central reinforcing member 5.
  • the loose tube 2 is provided with an optical fiber 4 and a filling fiber paste 3, and the loose tube 2 forms a cable around the central reinforcing member 5.
  • core for example, the loose tube 2 is a polybutylene terephthalate loose tube 2, and a colored optical fiber 4 and a filling fiber paste 3 are arranged in the polybutylene terephthalate loose tube 2.
  • the butylene dicarboxylate loose tube 2 surrounds the central strength member 5 (FRP) to form a cable core with a (1+N) structure by SZ twisting, and the gap in the cable core is filled with a water blocking filler 7 .
  • FRP central strength member 5
  • the inner sheath 1, the middle sheath 8 and the outer sheath 10 are all PE cable materials.
  • the inner sheath 1 and the middle sheath 8 are made of polymer PE sheath material
  • the outer sheath 10 is made of a polymer PE sheath material with resistance to electrical tracking.
  • Embodiment 2 of the present invention provides a preparation process of a non-metal armored three-sheath self-supporting rodent-proof optical cable, comprising the following steps:
  • a coloring mold is used to color the optical fibers 4. After the coloring is completed, an attenuation test is performed on each reel of optical fibers 4, and the optical fibers 4 that pass the test are put into the next production process.
  • the loose tube 2 is preferably a polybutylene terephthalate loose tube 2, and a colored optical fiber 4 and a filling fiber paste 3 are arranged in the polybutylene terephthalate loose tube 2. After the tube is finished, it is necessary to check the wall thickness and excess length of the loose tube 2, and put it into the next production process after passing the inspection.
  • a cable core is formed by SZ twisting around the central strength member 5, and a water blocking filler 7 is filled in the gap in the cable core.
  • the central strength member 5 adopts a non-metallic strength member
  • the polybutylene terephthalate loose tube 2 surrounds the central strength member 5 (FRP) to form a cable core with a (1+N) structure through SZ stranding.
  • the gap in the cable core is filled with a water blocking filler 7 for strong water blocking effect.
  • the load-bearing element 6 is aramid yarn, and multiple strands of ultra-high modulus aramid yarn are wrapped around the outer side of the inner sheath 1 to enhance the tensile performance of the self-supporting optical cable, wherein the inner sheath 1 is made of high Molecular PE sheath material.
  • the pay-off tension of the high-strength aramid yarn needs to be checked to ensure the tight bonding between the aramid yarn and the inner sheath 1, and then the outer side of the load-bearing element 6 is extruded.
  • a middle jacket 8 is formed, and the middle jacket 8 is made of a polymer PE jacket material; after that, the outer side of the middle jacket 8 is wrapped with a rat-proof layer 9, and the rat-proof layer 9 is a glass fiber yarn, and multiple strands of glass fiber yarn are wrapped.
  • the glass fiber yarn can further enhance the tensile strength of the optical cable, and on the other hand, it can also achieve effective anti-rat performance.
  • an outer sheath 10 is formed by extrusion molding on the outside of the anti-rat layer 9.
  • the preparation process of the invention is simple in operation and low in process cost, and the prepared optical cable has remarkable tensile and bending properties, light weight, simple construction operation and easy laying.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)

Abstract

本发明公开了一种非金属铠装三护套自承式防鼠光缆，包括缆芯、护套层、承力元件和防鼠层，护套层包括内护套、中护套和外护套，缆芯的外侧依次设有内护套、中护套和外护套，内护套与中护套之间设有承力元件，中护套和外护套之间设有防鼠层。本发明结构设计简单合理，采用三层非金属护套的结构，一方面在内护套和中护套之间设有承力元件，显著增强了自承式光缆的抗拉性；另一方面在中护套和外护套之间设有防鼠层，能够达到较好的防鼠效果。而且制备工艺操作简单，工艺成本低，本发明制得的光缆具有显著的抗拉性能和弯曲性能，重量轻，施工操作简单，敷设容易。

Description

非金属铠装三护套自承式防鼠光缆及制备工艺 技术领域
本发明涉及光缆技术领域，尤其涉及非金属铠装三护套自承式防鼠光缆及制备工艺。
背景技术
光纤传输通信系统是目前通信系统中最常用的传输系统之一，近年来随着电网的高速发展，光缆和变电所节点数量迅速增长，光通信技术在电力系统得到了广泛应用。由于普通架空光缆建设周期短，有良好的机械及防潮、防水性能，可以适应不同的环境，维护方便，因此普通架空光缆的应用非常普遍。但是近年来普通架空光缆被鼠类咬断的现象也日渐增多，对电力通信网的安全稳定运行造成了极大的威胁，最后导致光缆损坏、报废，失去使用价值。
目前传统的光缆防鼠型常常采用化学防鼠方法和物理防鼠方法，其中通常的化学防鼠方法往往在护套料中加入一些具有强烈刺激的化学物质的方法来防止光缆被鼠类噬咬破坏，但是在实际使用时存在化学试剂挥发、失效以及环境污染的隐患；另外通常的物理方法是指在光缆中加入鼠类无法破坏的坚硬的材料，保证光缆内层不被破坏。例如金属铠装光缆，虽然金属防护层可以在一定程度上预防鼠类动物的啃咬，但是这种坚硬的金属铠装层也在一定程度上降低了光缆的弯曲性能，导致其敷设难度较大。而且根据研究表明，一旦光缆金属铠装层被咬损后，则暴露于外的金属层极易与外界环境发生化学腐蚀反应，从而导致对光缆彻底失去防鼠能力。
发明内容
为了解决上述的技术问题，本发明的一个目的是提供一种非金属铠装三护套自承式防鼠光缆，包括缆芯和中心加强件，所述缆芯包括光纤、松套管、填充纤膏和中心加强件，松套管内设有光纤和填充纤膏，松套管围绕中心加强件形成缆芯；包括护套层、承力元件和防鼠层，所述护套层包括内护套、中护套和外护套，所述缆芯的外侧依次设有内护套、中护套和外护套，所述内护套与中护套之间设有承力元件，所述中护套和外护套之间设有防鼠层。
采用以上技术方案，所述承力元件为芳纶纱，多股芳纶纱绕包于内护套与中护套之间。
采用以上技术方案，所述防鼠层为玻璃纤维纱，多股玻璃纤维纱绕包于中护套与外护套之间。
采用以上技术方案，所述内护套、中护套和外护套均为PE缆料。
采用以上技术方案，所述松套管为聚对苯二甲酸丁二醇酯松套管。
采用以上技术方案，还包括阻水填充物，所述缆芯内的缝隙填充有阻水填充物。
本发明的另一目的是提供一种非金属铠装三护套自承式防鼠光缆的制备工艺，包括如下内容：
对光纤进行着色和衰减测试；
在合格的光纤外侧包裹松套管，松套管内填充有填充纤膏；
松套管围绕中心加强件通过SZ绞合形成缆芯，在缆芯内的缝隙填充有阻水填充物；
缆芯的外侧挤塑形成有内护套，在内护套的外侧绕包有承力元件；
承力元件的外侧挤塑形成有中护套，在中护套的外侧绕包有防鼠层；
在防鼠层的外侧挤塑形成有外护套。
采用以上技术方案，所述承力元件为芳纶纱，多股芳纶纱绕包于内护套与中护套之间。
采用以上技术方案，所述防鼠层为玻璃纤维纱，多股玻璃纤维纱绕包于中护套与外护套之间。
采用以上技术方案，所述内护套、中护套和外护套均为PE缆料。
本发明的有益效果：本发明结构设计简单合理，采用三层非金属护套的结构，一方面在内护套和中护套之间设有承力元件，显著增强了自承式光缆的抗拉性；另一方面在中护套和外护套之间设有防鼠层，能够达到较好的防鼠效果。而且制备工艺操作简单，工艺成本低，本发明制得的光缆具有显著的抗拉性能和弯曲性能，重量轻，施工操作简单，敷设容易。
附图说明
图1是本发明实施例1的结构示意图。
图中标号说明：1、内护套；2、松套管；3、填充纤膏；4、光纤；5、中心加强件；6、承力元件；7、阻水填充物；8、中护套；9、防鼠层；10、外护套。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而 不是全部的实施例。
所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。
实施例1
参照图1所示，本发明实施例1提供一种非金属铠装三护套自承式防鼠光缆，该光缆的结构包括缆芯、护套层、承力元件6和防鼠层9，护套层包括内护套1、中护套8和外护套10，缆芯的外侧依次设有内护套1、中护套8和外护套10，内护套1与中护套8之间设有承力元件6，中护套8和外护套10之间设有防鼠层9。本发明光缆设计为三层护套的结构，一方面在内护套1和中护套8之间设有承力元件6，显著增强了自承式光缆的抗拉性；另一方面在中护套8和外护套10之间设有防鼠层9，能够达到较好的防鼠效果。
具体地，承力元件6为芳纶纱，多股芳纶纱绕包于内护套1与中护套8之间。例如在内护套1和中护套8之间绕包多股超高模量的芳纶纱，用于起到加强自承式光缆的抗拉性能，能够提高自承式光缆的拉伸性能；还有防鼠层9为玻璃纤维纱，多股玻璃纤维纱绕包于中护套8与外护套10之间，一方面玻璃纤维纱可以进一步增强光缆的拉伸强度，另一方面也可以达到有效的防鼠性能。
还有，缆芯包括光纤4、松套管2、填充纤膏3和中心加强件5，松套管2内设有光纤4和填充纤膏3，松套管2围绕中心加强件5形成缆芯。例 如松套管2为聚对苯二甲酸丁二醇酯松套管2，在聚对苯二甲酸丁二醇酯松套管2内设有着色的光纤4和填充纤膏3，聚对苯二甲酸丁二醇酯松套管2围绕中心加强件5(FRP)通过SZ绞合形成(1+N)结构的缆芯，在缆芯内的缝隙填充有阻水填充物7。
优选的，内护套1、中护套8和外护套10均为PE缆料。例如内护套1和中护套8采用高分子PE护套材料，外护套10采用高分子耐电痕的PE护套材料。
实施例2
本发明实施例2提供一种非金属铠装三护套自承式防鼠光缆的制备工艺，包括以下步骤：
S101:对光纤4进行着色和衰减测试。
具体地，针对常规通信用的光纤4，采用着色模具对光纤4进行着色，在着色完成后，对每盘光纤4进行衰减测试，测试合格的光纤4投入到下一道工序生产。
S102:在合格的光纤4外侧包裹松套管2，松套管2内填充有填充纤膏3。
具体地，松套管2优选聚对苯二甲酸丁二醇酯松套管2，在聚对苯二甲酸丁二醇酯松套管2内设有着色的光纤4和填充纤膏3，套管做好后，需要检查松套管2的壁厚和余长，检查合格后投入到下一道工序生产。
S103:围绕中心加强件5通过SZ绞合形成缆芯，在缆芯内的缝隙填充有阻水填充物7。
具体地，中心加强件5采用非金属加强件，聚对苯二甲酸丁二醇酯松套 管2围绕中心加强件5(FRP)通过SZ绞合形成(1+N)结构的缆芯，在缆芯内的缝隙填充有用于起到强阻水效果的阻水填充物7，缆芯成缆时必须保证收线整齐。
S104:缆芯的外侧挤塑形成有内护套1，在内护套1的外侧绕包有承力元件6。
具体地，承力元件6为芳纶纱，多股超高模量的芳纶纱绕包在内护套1的外侧，以增强自承式光缆的抗拉性能，其中内护套1采用高分子PE护套材料。
S105:承力元件6的外侧挤塑形成有中护套8，在中护套8的外侧绕包有防鼠层9。
具体地，在挤塑中护套8之前，需要校对高强度芳纶纱的放线张力，保证芳纶纱和内护套1之间的紧密结合，之后再在承力元件6的外侧挤塑形成有中护套8，中护套8采用高分子PE护套材料；之后中护套8的外侧绕包有防鼠层9，防鼠层9为玻璃纤维纱，多股玻璃纤维纱绕包于中护套8的外侧，一方面玻璃纤维纱可以进一步增强光缆的拉伸强度，另一方面也可以达到有效的防鼠性能，
S106:在防鼠层9的外侧挤塑形成有外护套10。
具体地，在挤塑外护套10之前，需要满足各玻璃纤维纱的张力匹配，调整模具和玻璃纤维纱的整齐排放以确保光缆渗水合格，外护套10采用高分子耐电痕的PE护套材料。
本发明制备工艺操作简单，工艺成本低，制得的光缆具有显著的抗拉性 能和弯曲性能，重量轻，施工操作简单，敷设容易。
以上所述实施例仅是为充分说明本发明而所举的较佳的实施例，本发明的保护范围不限于此。本技术领域的技术人员在本发明基础上所作的等同替代或变换，均在本发明的保护范围之内。本发明的保护范围以权利要求书为准。

Claims (10)

  1. 一种非金属铠装三护套自承式防鼠光缆，包括缆芯和中心加强件，所述缆芯包括光纤、松套管、填充纤膏和中心加强件，松套管内设有光纤和填充纤膏，松套管围绕中心加强件形成缆芯；其特征在于：
    包括护套层、承力元件和防鼠层，所述护套层包括内护套、中护套和外护套，所述缆芯的外侧依次设有内护套、中护套和外护套，所述内护套与中护套之间设有承力元件，所述中护套和外护套之间设有防鼠层。
  2. 如权利要求1所述的非金属铠装三护套自承式防鼠光缆，其特征在于：所述承力元件为芳纶纱，多股芳纶纱绕包于内护套与中护套之间。
  3. 如权利要求1所述的非金属铠装三护套自承式防鼠光缆，其特征在于：所述防鼠层为玻璃纤维纱，多股玻璃纤维纱绕包于中护套与外护套之间。
  4. 如权利要求1所述的非金属铠装三护套自承式防鼠光缆，其特征在于：所述内护套、中护套和外护套均为PE缆料。
  5. 如权利要求1所述的非金属铠装三护套自承式防鼠光缆，其特征在于：所述松套管为聚对苯二甲酸丁二醇酯松套管。
  6. 如权利要求1所述的非金属铠装三护套自承式防鼠光缆，其特征在于：还包括阻水填充物，所述缆芯内的缝隙填充有阻水填充物。
  7. 一种如权利要求1至6任一项所述的非金属铠装三护套自承式防鼠光缆的制备工艺，其特征在于：包括如下内容：
    对光纤进行着色和衰减测试；
    在合格的光纤外侧包裹松套管，松套管内填充有填充纤膏；
    松套管围绕中心加强件通过SZ绞合形成缆芯，在缆芯内的缝隙填充有阻水填充物；
    缆芯的外侧挤塑形成有内护套，在内护套的外侧绕包有承力元件；
    承力元件的外侧挤塑形成有中护套，在中护套的外侧绕包有防鼠层；
    在防鼠层的外侧挤塑形成有外护套。
  8. 如权利要求7所述的非金属铠装三护套自承式防鼠光缆的制备工艺，其特征在于：所述承力元件为芳纶纱，多股芳纶纱绕包于内护套与中护套之间。
  9. 如权利要求7所述的非金属铠装三护套自承式防鼠光缆的制备工艺，其特征在于：所述防鼠层为玻璃纤维纱，多股玻璃纤维纱绕包于中护套与外护套之间。
  10. 如权利要求7所述的非金属铠装三护套自承式防鼠光缆的制备工艺，其特征在于：所述内护套、中护套和外护套均为PE缆料。
PCT/CN2021/129683 2020-11-11 2021-11-10 非金属铠装三护套自承式防鼠光缆及制备工艺 WO2022100591A1 (zh)

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