CN1020961C - 光缆 - Google Patents

光缆 Download PDF

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Publication number
CN1020961C
CN1020961C CN87105513A CN87105513A CN1020961C CN 1020961 C CN1020961 C CN 1020961C CN 87105513 A CN87105513 A CN 87105513A CN 87105513 A CN87105513 A CN 87105513A CN 1020961 C CN1020961 C CN 1020961C
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CN
China
Prior art keywords
reinforcing element
optical cable
fibre bundle
oversheath
cable according
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Expired - Lifetime
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CN87105513A
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CN87105513A (zh
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艾伦·詹姆斯·皮科克
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Telephone Cables Ltd
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Telephone Cables Ltd
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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
    • G02B6/4415—Cables for special applications
    • G02B6/4416—Heterogeneous cables
    • G02B6/4422—Heterogeneous cables of the overhead type

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Communication Cables (AREA)
  • Glass Compositions (AREA)
  • Laser Surgery Devices (AREA)
  • Surgical Instruments (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Insulated Conductors (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

一种光纤光缆，特别是一种架空缆，在其外护套(3)内，具有4或5个加强元件(1)，在由加强元件(1)所形成的间隙空间内装有至少一根光纤束(6、6.1)，这种电缆的结构对于被安装在相距远达1000米的铁塔上来说，具有足够的拉伸强度。

Description

本发明涉及一种光缆，尤其是涉及那种已知为架空缆类的光缆，这种架空缆设计成能自由地悬架在相距远达1千米的间隔的支承物上。
本发明提出这样一种光缆，该光缆包括一个圆管形外护套，其内至少有三个纵向延伸的非金属材料的加强元件，这些加强元件与外护套之间形成间隙空间，其中每一加强元件只受到另两个加强元件和外护套的内表面的支撑;还包括至少一条含有多根光纤的光纤束，该光纤束处于相应一对加强元件与外护套之间的间隙空间内，其半径显著地小于相应的加强元件的半径，并且该光纤束与外护套的内表面被一部分间隙空间分隔开。
光纤可以是一绞合光纤束，或是一光纤带、或叠在一起的多条光纤带，或其他通常的结构型式。
光纤束件最好包容在一管子内，该管子的尺寸能容许光纤在其里面一定程度的横向移动，该管子内最好充有如油脂那样的阻塞水的物质。阻塞水的物质也可以充填在相邻加强元件之间的空隙内和加强元件与外护套之间的空隙内。
用作为一架空缆，该加强元件当然必须能对缆的拉伸提供足够的抵抗力，以防当缆悬架在相隔距离为其最大的设计距离的二支撑物之间时作用在光纤上的不适当的应力。
并且，对架空缆来说，对给定的加强元件的总的截面积，特别希望其具有最小的外径，同时却具有足够的间隙空间来容纳光纤束。
我们发现对圆形横截面的加强元件来说，一般有四或五个加强元 件。这些加强元件最好是由玻璃增强塑料或其他适宜的高分子材料绞合在一起成螺旋状结构形成。
在一装有4个圆截面的加强元件的架空缆中，光纤束一般在由相邻的加强元件与包围在外面的外护套的内表面之间形成的空隙通道中围绕加强元件而绞合。这些通道具有这样的高度，使得光纤束与外护套的内表面分离开。这样在缆安装和使用时，能保护光纤抵御外部压力。
加强元件的直径例如可以是约为5毫米，这可以许可一个外径约为2毫米，并容纳例如是4根光纤的管子被装容在所述的空隙通道内而不与外护套的内表面相接触。在这种情况下，可在4个绞合的加强元件之间的中央通道内设置一减震缓冲元件。
在使用五个加强元件的情况下，光纤一般装容在由加强元件包围而成的中央通道内。
现在参阅附图，通过举例说明实施本发明的架空缆的一种形式。附图中示出了这种缆的横截面。
这种缆包括4个圆形横截面的加强元件1的缆，这些加强元件由玻璃增强塑料材料制成，每个直径约为5毫米，围绕一中心减震缓冲垫料2而绞合在一起。垫料2由聚乙烯制成，直径约为2毫米。加强元件被包围在一紧密贴合的聚乙稀或其他聚合物外护套3内，护套3的壁厚约为1.5毫米。
在形成在相邻的各对加强元件1之间的四个通道4内，放有4根光纤元件5，每根包括有一由合适的聚合物制成的直径为2毫米的管子7，管子7内有一由4根单根形式光纤6组成的光纤束，并充有油脂或其他阻塞水的化合物，使能允许光纤在管内一定程度的横向移动。通道4具有这样的高度，使得光纤元件5能与包围在外面的护套3的内表面相隔开，从而保护抵御外部压力。
在加强元件1，光纤元件5和护套3之间的间隙空间中也可以充填 适当的阻塞水的化合物，以免水份沿着电缆渗入。
外护套可以容有一适当的垫料，以提供一个足够强度的抵抗力。
在有些情况下，加强元件可以包一层塑料材料，给予另外的机械和/或环境保护。

Claims (9)

1、一种光缆，包括：一个圆管形外护套(3)；至少三个处于外护套内并与之形成间隙空间的纵向延伸的加强元件(1)，其中每一个加强元件只受到另两个加强元件和所述外护套的内表面的支撑；以及至少一条包括多根光纤(6)的光纤束(5)，其特征在于，所述加强元件是由非金属材料制成的；所述光纤束处于相应一对所述加强元件与所述护套之间的间隙空间内；所述光纤束的半径显著地小于相应一个所述加强元件的半径；以及一部分间隙空间将所述光纤束与所述外护套的内表面分隔开。
2、根据权利要求1所述的光缆，其特征在于每一光纤束（6，6.1）被装容在一管子（7，8）内，管子的尺寸容许其内的光纤的一定程度的横向移动。
3、根据权利要求2所述的光缆，其特征在于每一管子（7，8）中充有一种阻塞水的物质。
4、根据权利要求2所述的光缆，其特征在于，一种阻塞水的物质被装在相邻的加强元件（1）之间，以及加强元件（1）与外护套（3）之间的间隙空间内。
5、根据权利要求3或4所述的光缆，其特征在于该阻塞水的物质是基本上充填在管子（7，8）中的油脂。
6、根据权利要求1所述的光缆，其特征在于它有4或5个圆形截面的加强元件（1）。
7、根据权利要求1所述的光缆，其特征在于加强元件（1）是由玻璃增强塑料材料绞合在一起成一螺旋状结构。
8、根据权利要求6所述的光缆，其特征在于它有4个圆形截面的加强元件（1），在形成于相邻加强元件1和包围在外面的护套（3）的内表面之间的空隙空间内，装有多根围绕加强元件（1）绞合的所述的光纤束（6）。
9、根据权利要求8所述的光缆，其特征在于，设有一减震缓冲元件（2），该元件被诸加强元件（1）包围。
CN87105513A 1986-08-07 1987-08-07 光缆 Expired - Lifetime CN1020961C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8619308 1986-08-07
GB868619308A GB8619308D0 (en) 1986-08-07 1986-08-07 Optical cables

Publications (2)

Publication Number Publication Date
CN87105513A CN87105513A (zh) 1988-02-17
CN1020961C true CN1020961C (zh) 1993-05-26

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CN87105513A Expired - Lifetime CN1020961C (zh) 1986-08-07 1987-08-07 光缆

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US (1) US4822133A (zh)
EP (1) EP0256704B1 (zh)
JP (1) JPS6343112A (zh)
CN (1) CN1020961C (zh)
AT (1) ATE75327T1 (zh)
AU (1) AU601461B2 (zh)
CA (1) CA1291889C (zh)
DE (1) DE3778447D1 (zh)
ES (1) ES2031508T3 (zh)
FI (1) FI873421A (zh)
GB (2) GB8619308D0 (zh)
IN (1) IN171045B (zh)
MY (1) MY100856A (zh)
NO (1) NO172824B (zh)
NZ (1) NZ221334A (zh)
PT (1) PT85511B (zh)
ZA (1) ZA872668B (zh)

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Also Published As

Publication number Publication date
GB2193583B (en) 1990-05-16
AU601461B2 (en) 1990-09-13
GB8619308D0 (en) 1986-09-17
ZA872668B (en) 1987-11-25
ES2031508T3 (es) 1992-12-16
US4822133A (en) 1989-04-18
MY100856A (en) 1991-03-15
NO172824B (no) 1993-06-01
IN171045B (zh) 1992-07-04
GB8702554D0 (en) 1987-03-11
FI873421A (fi) 1988-02-08
ATE75327T1 (de) 1992-05-15
CA1291889C (en) 1991-11-12
EP0256704A1 (en) 1988-02-24
EP0256704B1 (en) 1992-04-22
CN87105513A (zh) 1988-02-17
NZ221334A (en) 1989-08-29
JPS6343112A (ja) 1988-02-24
DE3778447D1 (de) 1992-05-27
GB2193583A (en) 1988-02-10
PT85511A (pt) 1988-08-17
AU7660087A (en) 1988-02-11
FI873421A0 (fi) 1987-08-06
NO873292D0 (no) 1987-08-06
NO873292L (no) 1988-02-08
PT85511B (pt) 1993-07-30

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