WO2020238934A1 - 一种柔性光纤带松套管光缆 - Google Patents

一种柔性光纤带松套管光缆 Download PDF

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Publication number
WO2020238934A1
WO2020238934A1 PCT/CN2020/092519 CN2020092519W WO2020238934A1 WO 2020238934 A1 WO2020238934 A1 WO 2020238934A1 CN 2020092519 W CN2020092519 W CN 2020092519W WO 2020238934 A1 WO2020238934 A1 WO 2020238934A1
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Prior art keywords
flexible
optical fiber
loose tube
fiber ribbon
optical cable
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PCT/CN2020/092519
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English (en)
French (fr)
Inventor
陈学山
黄�俊
何军
潘峰
熊壮
吴帆
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长飞光纤光缆股份有限公司
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Publication of WO2020238934A1 publication Critical patent/WO2020238934A1/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

Definitions

  • the invention relates to a flexible optical fiber ribbon loose tube optical cable, which belongs to the technical field of optical communication transmission.
  • Optical fiber ribbon cable has the advantages of high optical fiber density, easy construction, short connection time, convenient maintenance, and low engineering cost. It has a wide range of applications in optical fiber access networks, interoffice relays, and FTTH networks, and is especially suitable for information in today's data centers. Places requiring high signal density.
  • the loose tube of the existing stranded optical cable is generally made of polybutylene terephthalate (PBT). PBT has good solvent resistance, oil resistance, chemical resistance, etc., and has hydrolysis resistance. It has high crystallinity, so it has high strength and hardness, but the bending performance of PBT casing is relatively poor, and there will be problems in the splicing and coiling of the optical cable.
  • PBT polybutylene terephthalate
  • the technical problem to be solved by the present invention is to provide a flexible optical fiber with loose tube optical cable for the above-mentioned shortcomings of the prior art, which not only has a large fiber capacity and is convenient to splice, but also has good flexibility of the loose tube, which is convenient for diverging and keeping. Laying in small spaces.
  • the technical solution adopted by the present invention to solve the above-mentioned problems is: comprising an outer sheath and a cable core.
  • the cable core is formed by twisting a plurality of loose tubes, and is characterized in that the loose tubes are A flexible loose tube, wherein the laminated optical fiber ribbon is sheathed in the flexible loose tube.
  • the flexible loose tube is made of TPE, TPEE or modified TPEE material.
  • the section of the flexible loose tube is circular, the outer diameter of the flexible loose tube is 5-15 mm, and the single-sided wall thickness is 0.4-0.8 mm.
  • the number of cores of the optical fiber ribbon is 4 to 24 cores, and the optical fiber ribbon is rotatably laid in the flexible sleeve with S twist or Z twist, and the rotation pitch is 400-700 mm.
  • a central reinforcement is provided in the center of the cable core
  • the cable core is provided with a water blocking layer, and the water blocking layer is covered with a longitudinally clad steel strip.
  • the minimum bending radius of the flexible loose tube covering the optical fiber ribbon is 4 to 5 times the outer diameter of the loose tube.
  • the outer sheath is a PE outer sheath or a flame-retardant outer sheath.
  • the beneficial effects of the present invention are: 1.
  • the cable core adopts a loose tube fiber ribbon structure, which has a small diameter, large optical fiber capacity and convenient branch connection; 2.
  • the loose tube is a flexible loose tube, which not only has the mechanical and mechanical characteristics of a conventional loose tube Corrosion resistance, as well as excellent flexibility and bending performance, can make loose tube and optical cable reach a smaller bending radius without bending, can be laid in a narrow space, and can better protect the tube
  • the optical fiber unit reduces the failure rate of the optical cable line, improves the reliability of the communication line, and is especially helpful for the indoor laying of the optical cable; 3.
  • the connection tray is retained, the size of the required connector box is correspondingly small, and the fiber capacity rate of the optical cable router is high ,low cost. 4.
  • the cable core is equipped with central reinforcement, and the water blocking layer and longitudinally wrapped steel strip are arranged outside the cable core, so that the optical cable has strong tensile and compressive performance, and has good waterproof performance, which can be suitable for indoor and outdoor installation in complex environments construction.
  • Fig. 1 is a radial cross-sectional structure diagram of an embodiment of the present invention.
  • Figure 2 is a radial cross-sectional view of a loose tube in an embodiment of the invention.
  • An embodiment of the present invention includes an outer sheath 10 and a cable core.
  • the cable core is a stranded cable core, which is twisted around the central reinforcement 4 by 5 loose tubes
  • the loose tube is a flexible loose tube made of TPEE material.
  • the section of the flexible loose tube is circular, the outer diameter of the flexible loose tube is 7mm, and the single side wall thickness is 0.6mm.
  • 6 superimposed optical fiber ribbons are sleeved in the flexible loose tube, the number of fiber ribbon cores is 12, and the optical fiber ribbon is laid in the flexible tube by S twisting rotation, the rotation pitch is 600mm, and the flexible loose tube Filled with water blocking ointment 2.
  • the optical fiber ribbon adopts printing identification, the color of the printing identification mark is white or black, the printing interval is not more than 20 cm, and the optical fiber ribbon is identified by numbers.
  • the cable core is covered with a water blocking layer 8 which is composed of a longitudinally laid water blocking yarn or a water blocking tape, and the longitudinally-clad steel tape 7 is covered on the water blocking layer.
  • the longitudinally clad steel belt is wrapped with an outer sheath 10, and the outer sheath is a PE outer sheath.
  • a split cable 9 is provided in the inner shell of the outer sheath to facilitate cable splitting and divergence during construction; one or both sides of the outer sheath can be inlaid with longitudinal color strips 5 to facilitate the distinction and identification of the cable laying.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

一种柔性光纤带松套管光缆，包括有外护套(10)和缆芯，缆芯由多根松套管(3)绞合而成，特征在于松套管(3)为柔性松套管(3)，柔性松套管(3)内套装叠合的光纤带(1)。柔性光纤带松套管光缆直径小，光纤容量大，分歧接续方便；柔性松套管(3)不仅具备常规松套管(3)的机械和耐腐蚀性能，同时还具有优良的柔性和弯曲性能，可使松套管(3)及光缆达到较小的弯曲半径而不发生弯折，能够在狭小的空间内敷设，并能够更好的保护套管中的光纤单元，减少光缆线路的故障率，提高通信线路的可靠性，特别有助于光缆室内敷设；续接盘留时，所需接头盒尺寸也相应较小，光缆路由器的容纤率高，成本低。光缆还具备较强的抗拉抗压性能，并具有良好的防水性能，可适于室内外复杂环境的敷设施工。

Description

一种柔性光纤带松套管光缆 技术领域
本发明涉及一种柔性光纤带松套管光缆，属于光通信传输技术领域。
背景技术
光纤带光缆具有光纤密度大、易于施工、接续时间短、维护方便、工程造价低等优点，在光纤接入网络、局间中继以及FTTH网有广泛的应用，尤其适合现今数据中心等对信息信号密度要求较高的场所。现有的层绞式光缆，其松套管一般使用聚对苯二甲酸丁二醇酯(PBT)制成，PBT具有良好的耐溶剂、耐油、耐化学腐蚀等性能，具有耐水解特性，同时具有较高的结晶度，因而具有较高强度和硬度，但PBT套管的弯折性能比较差，在光缆的续接和盘留时会出现问题，因套管弯曲半径较大，施工时接头盒要做的非常大，占用了空间资源。另一方面因套管弯曲性能不好，难以在狭小空间中敷设，在施工时容易造成套管弯折，有时会折断光纤，给施工带来不便。
发明内容
本发明所要解决的技术问题在于针对上述现有技术存在的不足提供一种柔性光纤带松套管光缆，该光缆不仅纤容量大、接续方便，而且松套管弯曲性好，便于分歧盘留和狭小空间的敷设。
本发明为解决上述提出的问题所采用的技术方案为：包括有外护套和缆芯，所述的缆芯由多根松套管绞合而成，其特征在于所述的松套管为柔性松套管，所述的柔性松套管内套装叠合的光纤带。
按上述方案，所述的柔性松套管由TPE、TPEE或改良TPEE材料制成。
按上述方案，所述的柔性松套管的截面为圆形，柔性松套管外径为5～15mm,单边壁厚为0.4～0.8mm。
按上述方案，所述的光纤带芯数为4芯～24芯，所述的光纤带以S绞或Z绞旋转敷设在柔性套管中，旋转节距为400～700mm。
按上述方案，所述的缆芯中心设置有中心加强件，
按上述方案，所述的缆芯外敷设有阻水层，阻水层外包覆纵包钢带。
按上述方案，所述的套装光纤带的柔性松套管最小弯曲半径为松套管外径的4～5倍。
按上述方案，所述的外护套为PE外护套或阻燃外护套。
本发明的有益效果在于：1、缆芯采用松套管光纤带结构，直径小，光纤容量大，分歧接续方便；2、松套管为柔性松套管，不仅具备常规松套管的机械和耐腐蚀性能，同时还具有 优良的柔性和弯曲性能，可使松套管及光缆达到较小的弯曲半径而不发生弯折，能够在狭小的空间内敷设，并能够更好的保护套管中的光纤单元，减少光缆线路的故障率，提高通信线路的可靠性，特别有助于光缆室内敷设；3、续接盘留时，所需接头盒尺寸也相应较小，光缆路由器的容纤率高，成本低。4、缆芯设置中心加强件，缆芯外设置阻水层和纵包钢带，使光缆具备较强的抗拉抗压性能，并具有良好的防水性能，可适于室内外复杂环境的敷设施工。
附图说明
图1为本发明一个实施例的径向剖面结构图。
图2为本发明一个实施例中松套管的径向剖面图。
具体实施方式
下面结合附图和实例对本发明作进一步的说明。
本发明的一个实施例中如图1、2所示，包括有外护套10和缆芯，所述的缆芯为层绞式缆芯，由5根松套管围绕中心加强件4绞合而成，所述的松套管为柔性松套管，由TPEE材料制成。所述的柔性松套管的截面为圆形，柔性松套管外径为7mm,单边壁厚为0.6mm。所述的柔性松套管内套装6根叠合的光纤带，光纤带芯数为12芯，所述的光纤带以S绞旋转敷设在柔性套管中，旋转节距为600mm，柔性松套管内充填有阻水油膏2。所述的光纤带采用印字识别，印字识别标志的颜色为白色或黑色，印字间隔不大于20cm，通过数字来识别光纤带。所述的缆芯外敷设有阻水层8，阻水层由纵向敷设的阻水纱或阻水带构成，在阻水层外包覆纵包钢带7。纵包钢带外包覆外护套10，所述的外护套为PE外护套。此外，在外护套内壳设置开缆绳9，以便于施工时的开缆和分歧；在外护套外的一侧或两侧可镶嵌纵向色条5可便于敷设时光缆的区分和识别。

Claims (8)

  1. 一种柔性光纤带松套管光缆，包括有外护套和缆芯，所述的缆芯由多根松套管绞合而成，其特征在于所述的松套管为柔性松套管，所述的柔性松套管内套装叠合的光纤带。
  2. 按权利要求1所述的柔性光纤带松套管光缆，其特征在于所述的柔性松套管由TPE、TPEE或改良TPEE材料制成。
  3. 按权利要求1或2所述的柔性光纤带松套管光缆，其特征在于所述的柔性松套管的截面为圆形，柔性松套管外径为5～15mm,单边壁厚为0.4～0.8mm。
  4. 按权利要求1或2所述的柔性光纤带松套管光缆，其特征在于所述的光纤带芯数为4芯～24芯，所述的光纤带以S绞或Z绞旋转敷设在柔性套管中，旋转节距为400～700mm。
  5. 按权利要求1或2所述的柔性光纤带松套管光缆，其特征在于所述的缆芯中心设置有中心加强件。
  6. 按权利要求1或2所述的柔性光纤带松套管光缆，其特征在于所述的缆芯外敷设有阻水层，阻水层外包覆纵包钢带。
  7. 按权利要求3所述的柔性光纤带松套管光缆，其特征在于所述的套装光纤带的柔性松套管最小弯曲半径为松套管外径的4～5倍。
  8. 按权利要求1或2所述的柔性光纤带松套管光缆，其特征在于所述的外护套为PE外护套或阻燃外护套。
PCT/CN2020/092519 2019-05-28 2020-05-27 一种柔性光纤带松套管光缆 WO2020238934A1 (zh)

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CN210465782U (zh) * 2019-05-28 2020-05-05 长飞光纤光缆股份有限公司 一种柔性光纤带松套管光缆
CN112255746A (zh) * 2020-11-06 2021-01-22 四川天府江东科技有限公司 一种具有绞合增强件的层绞式光缆和制备工艺
CN113341520B (zh) * 2021-06-01 2022-03-18 长飞光纤光缆股份有限公司 一种中心束管式大芯数带状光缆

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US6292611B1 (en) * 1999-10-22 2001-09-18 Pirelli Cables And Systems Llc High fiber count, compact, loose tube optical fiber cable employing ribbon units and flexible buffer tubes
CN201757801U (zh) * 2010-08-27 2011-03-09 常州市邮电通信光缆有限公司 松套层绞式带状光缆
CN106383388A (zh) * 2015-07-28 2017-02-08 南京海印通信设备有限公司 一种带状通信光缆
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