CN203643652U - A three-unit unidirectional spiral intertwist layer intertwist type optical cable - Google Patents
A three-unit unidirectional spiral intertwist layer intertwist type optical cable Download PDFInfo
- Publication number
- CN203643652U CN203643652U CN201320731623.7U CN201320731623U CN203643652U CN 203643652 U CN203643652 U CN 203643652U CN 201320731623 U CN201320731623 U CN 201320731623U CN 203643652 U CN203643652 U CN 203643652U
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- Prior art keywords
- intertwist
- optical cable
- layer
- loose sleeve
- sleeve pipe
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- Expired - Fee Related
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Abstract
The utility model provides a three-unit unidirectional spiral intertwist layer intertwist type optical cable. The main technical scheme is that a reinforcement core is in the center portion of an optical cable; three loose sleeve pipes surround the reinforcement core in a unidirectional spiral intertwist mode; and two parallel steel wires are arranged in an oversheath, so that the integral performance of the optical cable is improved and materials for manufacturing the optical cable are saved.
Description
Technical field
The invention relates to a kind of improved layer-stranding cable.
Background technology
Optical cable has been widely used in network communication at present.Optical cable can be divided into central beam tube type and layer-stranding cable structure.In central-beam tube type fiber optic cable, owing to only having the fine loose sleeve pipe of giving out light, the remaining length of optical cable is just inevitable less like this.And owing to plaing, the diameter of two parallel steel wires of stretch-proof effect is larger, makes the size of optical cable also larger, and this just makes the bending property of optical cable poor.And in SZ layer-stranding cable, conventionally adopt spiral bidirectional mode stranded, between stranded so loose sleeve pipe, be easy to become flexible, therefore need with yarn colligation pine sleeve pipe, but due to the bad control of tension force of colligation yarn, do not do a good job and will damage loose sleeve pipe, so loose casing diameter is just compelled to do greatlyr, corresponding, and the strengthening core in the middle of several loose sleeve pipes also must do slightlyer.The diameter of optical cable also increases naturally like this.The bending property of optical cable must be affected.The starting material that drop into also will increase.
Summary of the invention
The problem that the invention will solve is comprehensively improved the deficiency on central beam tube type and two kinds of cable configurations of layer-twisted type as basis take layer-stranding cable, and compared with the optical cable of existing same specification, bending property is better, is especially for small size optical cable.
For solving the problems of the technologies described above, the technical scheme that the invention adopts is: a kind of layer-stranding cable, include loose sleeve pipe, optical fiber, fine cream, cable cream, outer jacket, sheath, have a strengthening core at the center of optical cable, around strengthening core with three loose sleeve pipes in the unidirectional stranded mode of spiral by strengthening core around getting up.Between pine sleeve pipe and sheath, be filled with cable cream, in loose sleeve pipe, put into optical fiber, and fill fine cream in loose sleeve pipe.
Stretch the needs of requirement according to optical cable tensile, if desired, can in the oversheath of layer-stranding cable, lay two parallel steel wires.
The advantage that the invention has with good effect is: compared with the layer-stranding cable of existing same size, because the mode that is wound around loose sleeve pipe is that spiral is unidirectional stranded, bundle without yarn like this, can not make loose sleeve pipe produce loosening yet, so just reduce the damage that yarn may cause loose sleeve pipe colligation tension, and affect the potential risk of optical fiber property, also save space and material simultaneously.In addition owing to adopting three loose sleeve structures, with respect to the structure of how loose sleeve pipe, between three loose sleeve pipes, the sectional area in space is minimum, and the diameter of strengthening core can do minimumly, the diameter of pine sleeve pipe also can do littlely, and the diameter of corresponding like this optical cable has also reduced.Therefore the bending property of optical cable can further be improved.In addition compared with the central-beam tube type fiber optic cable of same size, remaining length has also obtained further improvement.In a word, the invention had both improved the performance of optical cable, had saved again material and the size of manufacturing optical cable.
Accompanying drawing explanation
Fig. 1 is the invention optical cable cross sectional representation.
In figure: 1, optical fiber 2, fine cream 3, loose sleeve pipe 4, strengthening core
5, parallel steel wire 6, cable cream 7, sheath 8, outer jacket
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the invention is elaborated.
Three loose sleeve pipes 3 are wrapped in around a strengthening core 4 in one-way spiral mode, the diameter of every loose sleeve pipe 3 is 1.2～1.5mm, every loose sleeve pipe 3 be interior is placed with 12 optical fiber 1, and the material of loose sleeve pipe 3 is polybutylene terephthalate, and each loose sleeve pipe 3 is interior has filled fine cream 2.Have inner sheath 7 and oversheath 8 at loose sleeve pipe 3 overcoats, inner sheath 7 is fold steel band, and oversheath 8 is made up of tygon or bittern-free flame-proof material, between loose sleeve pipe 3 and inner sheath 7, fills with cable cream 6.If need further to strengthen the stretch-resistance of optical fiber, can in oversheath 8, symmetry add two parallel steel wires 5, the diameter of parallel steel wire 5 can, according to the composite request of bendability and stretch-resistance is adjusted, generally be less than the parallel steel wire diameter in same size central-beam tube type fiber optic cable.
Above the embodiment of the invention is had been described in detail, but described content is only for the preferred embodiment of the invention, can not be considered to for limiting practical range of the present invention.All equalization variation and improvement etc. of doing according to the invention scope, within all should still belonging to this patent covering scope.
Claims (4)
1. a layer-stranding cable, includes loose sleeve pipe, optical fiber, fine cream, strengthening core, cable cream, outer jacket, sheath, it is characterized in that: described loose sleeve pipe has three, and these three loose sleeve pipes are stranded in around strengthening core with spiral one way system.
2. layer-stranding cable according to claim 1, is characterized in that: in outer jacket, be placed with two parallel steel wires that distribute with optical cable Central Symmetry.
3. layer-stranding cable according to claim 1, is characterized in that: loose casing diameter is 1.2～1.5mm.
4. layer-stranding cable according to claim 1, is characterized in that: described every loose sleeve pipe inner fiber number is no more than 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320731623.7U CN203643652U (en) | 2013-11-15 | 2013-11-15 | A three-unit unidirectional spiral intertwist layer intertwist type optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320731623.7U CN203643652U (en) | 2013-11-15 | 2013-11-15 | A three-unit unidirectional spiral intertwist layer intertwist type optical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203643652U true CN203643652U (en) | 2014-06-11 |
Family
ID=50874886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320731623.7U Expired - Fee Related CN203643652U (en) | 2013-11-15 | 2013-11-15 | A three-unit unidirectional spiral intertwist layer intertwist type optical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203643652U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558672A (en) * | 2013-11-15 | 2014-02-05 | 天津长飞鑫茂光缆有限公司 | Three-unit unidirectional spiral stranded layer stranded optical cable |
-
2013
- 2013-11-15 CN CN201320731623.7U patent/CN203643652U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558672A (en) * | 2013-11-15 | 2014-02-05 | 天津长飞鑫茂光缆有限公司 | Three-unit unidirectional spiral stranded layer stranded optical cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20171115 |