CN104216080A - Super-high-density central tube cable - Google Patents
Super-high-density central tube cable Download PDFInfo
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- CN104216080A CN104216080A CN201410409902.0A CN201410409902A CN104216080A CN 104216080 A CN104216080 A CN 104216080A CN 201410409902 A CN201410409902 A CN 201410409902A CN 104216080 A CN104216080 A CN 104216080A
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- loose tube
- cable
- fibre bundle
- central
- fiber optic
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Abstract
The invention provides a super-high-density central tube cable comprising a loose tube. Single-strand or multi-strand fiber bundles are arranged inside the loose tube and are gathered into a spirally twisted core. Curable resin is intermittently adhered among a plurality of optical fibers in each fiber bundle. The loose tube is sequentially covered with a waterstop layer, a corrugated steel tape layer and a sheath which are concentric with the loose tube. The super-high-density central tube cable further comprises a pair of reinforcing cores penetrating the sheath. The fiber bundles are spirally twisted, density of fibers in the loose tube is increased, the diameter of the cable is decreased, and tensile performance of the cable is improved; all fibers are closer to the geometric center of the loose tube and well uniform in residual length; the reinforcing cores symmetrically arranged ensure symmetric thickness of the sheath and prevent stress concentration, and the fibers are intermittently adhered through the resin so that the fibers have a greater degree of freedom; the structural size of the cable is greatly decreased, and limited communication pipeline resources can be saved.
Description
Technical field
The invention belongs to central-beam tube type fiber optic cable field, especially relates to a kind of highdensity central-beam tube type fiber optic cable.
Background technology
Along with the sustainable growth of transinformation and broadband services demand, the needs built with fiber to the home, the demand of high fiber count cable is obviously increased, but high fiber count cable is subject to the restriction in urban Underground pipeline space, therefore, only be improved the density of optic fibre in optical cable, reduce the physical dimension of high fiber count cable, high fiber count cable just can be made to be applicable in existing Urban Underground sub-pipes.
The maximum core number of common central tube type optical cable can only be 12 cores, because the quantity of optical fiber is subject to the restriction of 12 kinds of colors of colored optical fiber in Loose tube, can only reach 12 cores at most in a Loose tube.In order to break through this restriction, prior art have employed following three kinds of modes: 1, colour circle: color spray ring is to show difference on the optical fiber of same color, but the diameter of optical fiber is very little, is difficult to identify colour circle in use procedure, easily makes mistakes.2, yarn is pricked in grouping: in units of 12 cores, distinguished with the bundle yarn of different colours, this mode causes Loose tube oversize, and speed of production reduces, and excess fiber length is unstable.3, adopting 12 core optic fibre belt optics, is one of effective way improving optical fibre in optical cable density, but due to fibre ribbon duplexer be rectangle, still waste space in certain Loose tube.In the production technology of central beam tube type optical fibre band optical cable, in order to not allow fibre ribbon flange, fibre ribbon duplexer spiral is twisted in Loose tube.This structure is had a surplus the shortcomings such as long uneven, sideband excessive distortion.When being to bear short-term pulling force, the limit fibre strain of the fine especially sideband in limit is larger.
Summary of the invention
The problem that the invention will solve is to provide a kind of high-density center beam tube type cable, effectively can not only increase the density of large optical fiber, reduces the physical dimension of optical cable, and can distinguish the color of different fiber easily.For 144 core optical cables, the invention reduces more than 2mm than the diameter of existing central beam tube type optical fibre band optical cable.
For solving the problems of the technologies described above, the technical scheme that the invention adopts is: a kind of super-high density central-beam tube type fiber optic cable, comprise Loose tube, sub-thread or multiply fibre bundle is laid with in described Loose tube, single strand optical fiber Shu Zuowei cable core or multiply fibre bundle are polymerized to the cable core of twisting in the shape of a spiral, cured resin is bonded with discontinuously between multifiber in per share fibre bundle, be filled with fine cream in cavity between described cable core and described Loose tube, the outside of described Loose tube is coated with concentric water blocking layer, wrinkle steel belt layer and sheath successively;
Also comprise pair of parallel in the strengthening core of described Loose tube radial direction, described strengthening core is arranged in described sheath and the center line of the center line of two strengthening cores and described Loose tube is positioned in same plane.
Wherein, described water blocking layer is set to waterstop, water blocking yarn, ointment, hot melt adhesive or the waterproofing rope along the longitudinal winding of described Loose tube.
Wherein, described strengthening core is set to phosphating steel wire, glass fibre strengthening core or aramid yarn strengthening core.
Wherein, 4 ~ 12 colored optical fibers are comprised in per share fibre bundle.
Wherein, the color of resin in other fibre bundle is different from per share fibre bundle for the color of the cured resin bondd.
Wherein, 2 ~ 12 strands of fibre bundles are laid with in described Loose tube.
Further, on the xsect of optical cable, described fibre bundle is arranged as annular array around the center line of described Loose tube.
Further, described sheath adopts tygon or halogen-free low-smoke flame retardant material, ensure optical cable can indoor and outdoor general.
The advantage that the invention has and good effect are:
1. adopt fibre bundle as elementary cell, reduce the space waste in Loose tube, improve the density of optic fibre in Loose tube;
2. compared with fine structure of faling apart with existing central beam tube type, fibre bundle is without the need to pricking with yarn is tired, but adopt single strand optical fiber Shu Zuowei cable core or multiply fibre bundle to be polymerized to the cable core of twisting in the shape of a spiral, not only reduce the diameter of optical cable and add the tensile property of optical cable, all optical fiber is closer to the geometric center of Loose tube, and the consistance of remaining length is good;
3. the strengthening core of symmetry ensure that the thickness of sheath is even, the stress in the bending process caused because thickness is asymmetric is there will not be to concentrate, avoid sheath to ftracture owing to bending, and in the bending range of fibre bundle, strengthening core assists fibre bundle to achieve its better bending property;
4. the optical fiber in fibre bundle is bonded together by resin discontinuity, and the degree of freedom of optical fiber is large, and the transmission performance of optical fiber is little by ectocine;
5., owing to significantly reducing the physical dimension of optical cable, limited communication conduit resource can be saved.
Accompanying drawing explanation
Fig. 1 is the cross sectional representation of the invention
Fig. 2 is the cured resin position view in the invention in fibre bundle
Fig. 3 is that in the invention, in Loose tube, multiply fibre bundle is polymerized to the structural representation of cable core
In figure: 1-Loose tube, the fine cream of 2-, 3-fibre bundle, 31-optical fiber, 32-resin, 4-strengthening core, 5-sheath, 6-water blocking layer, 7-wrinkle steel belt layer
Embodiment
Elaborate below in conjunction with the specific embodiment of accompanying drawing to the invention.
As shown in Figure 1, this super-high density central tube type optical cable, comprise Loose tube 1, Loose tube 1 adopts polybutylene terephthalate (PBT) material to be made, be laid with sub-thread or multiply fibre bundle 3 in described Loose tube 1, single strand optical fiber bundle 3 is polymerized to the cable core of twisting in the shape of a spiral as cable core or multiply fibre bundle 3; As Fig. 2, between the multifiber 31 in per share fibre bundle 3, be bonded with cured resin 32 discontinuously; Be filled with fine cream 2 in cavity between described cable core and described Loose tube 1, fine cream 2 has the effect of moistureproof and waterproof and mechanical damping; The outside of described Loose tube 1 is coated with concentric water blocking layer 6, wrinkle steel belt layer 7 and sheath 5 successively; Also comprise pair of parallel in the strengthening core 4 of described Loose tube 1 radial direction, described strengthening core 4 is arranged in described sheath 5 and the center line of the center line of two strengthening cores 4 and described Loose tube 1 is positioned in same plane.
Two strengthening cores 4 are arranged on the both sides of Loose tube 1 symmetrically, strengthening core 4 can adopt phosphating steel wire, glass fibre strengthening core or aramid yarn strengthening core, strengthening core 4 ensure that the thickness of sheath 5 is even, the stress in the bending process caused because thickness is asymmetric is there will not be to concentrate, avoid sheath 5 to ftracture owing to bending, and in the bending range of fibre bundle 3, strengthening core 4 assists fibre bundle 2 to achieve its better bending property.
Water blocking layer 6 protects fibre bundle 3 from the immersion of water, and water blocking layer 6 can be waterstop, water blocking yarn, ointment, hot melt adhesive or waterproofing rope.
As shown in Figure 3, multiply fibre bundle 3 in Loose tube 1 is set to the cable core of twisting in the shape of a spiral, add the tensile strength of optical cable, improve the quantity of unit area inner fiber 31, efficiently reduce the space shared by cable core and volume, preferably, cable core is laid on the center line of Loose tube 1, the fine cream 2 of cavity between cable core and Loose tube 1 is filled, fine cream 2 also serves the effect of fixing cable core position, on the xsect of optical cable, described fibre bundle 3 is arranged as annular array around the center line of described Loose tube 1, which ensure that the geometric center of all optical fiber 31 closer to Loose tube 1, remaining long consistance is good.
In an embodiment of the invention, be laid with 2 ~ 12 strands of fibre bundles 3 in Loose tube 1, and do not use the loose fine or superimposed body of fibre ribbon, can meet the quantitative requirement of the optical fiber in use procedure, each stock fibre bundle 3 is separate, non-interference.Preferably, in per share fibre bundle 3, be different from the color of resin in other fibre bundle 3 for the color of the cured resin 32 bondd, significantly can distinguish each fibre bundle 3 like this, avoid cross-reference.
In the present embodiment, 4 ~ 12 colored optical fibers 31 are comprised in per share fibre bundle 3, colored optical fiber 31 in per share fibre bundle 3 can homochromy also can not be homochromy, in colored optical fiber 31 and fibre bundle 3, the cured resin of different colours effectively increases optical fiber 31 number of combinations in optical cable, determines to need the optical fiber 31 used to combine by color.
Preferably, described sheath 5 adopts tygon or halogen-free low-smoke flame retardant material, ensure optical cable can indoor and outdoor general.
Above an embodiment of the invention has been described in detail, but described content being only the preferred embodiment of the invention, the practical range for limiting the invention can not being considered to.All equalization changes done according to the invention application range with improve, within the patent covering scope that still all should belong to the invention.
Claims (8)
1. a super-high density central-beam tube type fiber optic cable, it is characterized in that: comprise Loose tube (1), sub-thread or multiply fibre bundle (3) is laid with in described Loose tube (1), single strand optical fiber bundle (3) is polymerized to the cable core of twisting in the shape of a spiral as cable core or multiply fibre bundle (3), cured resin (32) is bonded with discontinuously between multifiber (31) in per share fibre bundle (3), fine cream (2) is filled with in cavity between described cable core and described Loose tube (1), the outside of described Loose tube (1) is coated with concentric water blocking layer (6) successively, wrinkle steel belt layer (7) and sheath (5),
Also comprise the pair of parallel strengthening core (4) radial in described Loose tube (1), described strengthening core (4) is arranged in described sheath (5) and the center line of the center line of two strengthening cores (4) and described Loose tube (1) is positioned in same plane.
2. central-beam tube type fiber optic cable according to claim 1, is characterized in that: described water blocking layer (6) is set to waterstop, water blocking yarn, ointment, hot melt adhesive or waterproofing rope.
3. central-beam tube type fiber optic cable according to claim 1, is characterized in that: described strengthening core (4) is set to phosphating steel wire, glass fibre strengthening core or aramid yarn strengthening core.
4. central-beam tube type fiber optic cable according to claim 1, is characterized in that: comprise 4 ~ 12 colored optical fibers (31) in per share fibre bundle (3).
5. central-beam tube type fiber optic cable according to claim 1, is characterized in that: be different from resin (32) color in other fibre bundle (3) in per share fibre bundle (3) for the color of the cured resin (32) bondd.
6. central-beam tube type fiber optic cable according to claim 1, is characterized in that: be laid with 2 ~ 12 bursts of fibre bundles (3) in described Loose tube (1).
7. central-beam tube type fiber optic cable according to claim 1, is characterized in that: on the xsect of optical cable, and described fibre bundle (3) is arranged as annular array around the center line of described Loose tube (1).
8. central-beam tube type fiber optic cable according to claim 1, is characterized in that: described sheath (5) adopts tygon or halogen-free low-smoke flame retardant material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410409902.0A CN104216080A (en) | 2014-08-19 | 2014-08-19 | Super-high-density central tube cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410409902.0A CN104216080A (en) | 2014-08-19 | 2014-08-19 | Super-high-density central tube cable |
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| Publication Number | Publication Date |
|---|---|
| CN104216080A true CN104216080A (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410409902.0A Pending CN104216080A (en) | 2014-08-19 | 2014-08-19 | Super-high-density central tube cable |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054337A (en) * | 2016-08-08 | 2016-10-26 | 中天科技海缆有限公司 | Production assembly line and production technology of optical unit sheath |
| CN113325533A (en) * | 2021-05-25 | 2021-08-31 | 长飞光纤光缆股份有限公司 | Skeleton type optical fiber ribbon optical cable |
| CN113534370A (en) * | 2021-06-16 | 2021-10-22 | 华为技术有限公司 | Optical cable |
| CN114047587A (en) * | 2022-01-13 | 2022-02-15 | 长飞光纤光缆股份有限公司 | Solidified bundled layer stranded optical cable and preparation method thereof |
-
2014
- 2014-08-19 CN CN201410409902.0A patent/CN104216080A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054337A (en) * | 2016-08-08 | 2016-10-26 | 中天科技海缆有限公司 | Production assembly line and production technology of optical unit sheath |
| CN113325533A (en) * | 2021-05-25 | 2021-08-31 | 长飞光纤光缆股份有限公司 | Skeleton type optical fiber ribbon optical cable |
| CN113325533B (en) * | 2021-05-25 | 2022-02-18 | 长飞光纤光缆股份有限公司 | Skeleton type optical fiber ribbon optical cable |
| CN113534370A (en) * | 2021-06-16 | 2021-10-22 | 华为技术有限公司 | Optical cable |
| CN113534370B (en) * | 2021-06-16 | 2022-10-04 | 华为技术有限公司 | Optical cable |
| CN114047587A (en) * | 2022-01-13 | 2022-02-15 | 长飞光纤光缆股份有限公司 | Solidified bundled layer stranded optical cable and preparation method thereof |
| CN114047587B (en) * | 2022-01-13 | 2022-04-22 | 长飞光纤光缆股份有限公司 | Solidified bundled layer stranded optical cable and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141217 |
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| WD01 | Invention patent application deemed withdrawn after publication |