CN201837759U - Novel rubber-covered cable - Google Patents
Novel rubber-covered cable Download PDFInfo
- Publication number
- CN201837759U CN201837759U CN2010205898437U CN201020589843U CN201837759U CN 201837759 U CN201837759 U CN 201837759U CN 2010205898437 U CN2010205898437 U CN 2010205898437U CN 201020589843 U CN201020589843 U CN 201020589843U CN 201837759 U CN201837759 U CN 201837759U
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- optical fiber
- sheath
- covered wire
- wire cable
- novelty
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Abstract
The utility model relates to a novel rubber-covered cable, which comprises optical fibers and a sheath. The optical fibers are placed in the sheath, each optical fiber comprises fiber core, a coating layer is disposed on the outer side of each fiber core, a resin coating is coated outside each coating layer, a tight coating protective layer is arranged outside each resin coating, and at least two optical fibers are disposed in the sheath and arranged in the sheath in a forky manner. The novel rubber-covered cable can meet requirement of small bent radius, strengthens mechanical performances via the tight coating protective layers and slows down static fatigue of the optical fibers. The service life of the novel rubber-covered cable is prolonged, and the optical fibers can be respectively connected with an optical fiber connector conveniently by the aid of a forky structure.
Description
Technical field
The utility model relates to the optical fiber cable of optical fiber communication.
Background technology
In the FTTH engineering, user's house wiring is the most complicated link in recent years, and the factor of consideration is more.Should guarantee line security, take into account again indoor attractive in appearance, the facility of also will constructing simultaneously, traditional single core inside cable can not satisfy the requirement of present stage FTTH engineering house wiring.Covered wire cable (claiming butterfly type optical cable again) can adapt to most of house wiring conditions as the substitute of traditional inside cable, for example can turn with the bending radius of 20mm, can the underwriter step down in the wall pressure above the optical cable, and engineering construction pulls the pulling force that brings.Simultaneously, cooperate multiple field connector, can in the shortest time, realize on-the-spot Cheng Duan, butt joint.So covered wire cable is the optimal selection of FTTH house wiring.
The basic structure of covered wire cable is as shown in Figure 1: wherein optical fiber 3, reinforcement FRP4, sheath 2.In the covered wire cable, single core, twin-core structure are more, also can make quadrature arrangement, wherein the widest with the twin-core structure use, its xsect is 8 fonts, and reinforcement adopts FRP, be positioned at two circle centers, optical fiber is positioned at the geometric center of 8 fonts, and the covered wire cable of standard is of a size of 2.0mm * 3.1mm.
Along with Access Network and FTTH constantly develop, for optical fiber new requirement is proposed also, G.652 optical fiber at this time traditional, a large amount of uses can not satisfy user demand fully in some occasion, so Dec in 2006, ITU has released new G.657 bending loss insensitive single-mode fiber, and (bending loss is two classes G.657B.G.657A need be compatible fully with the G.652D optical fiber of routine, bending radius may diminish to 10mm; G.657B optical fiber do not impose with and G.652D optical fiber is compatible fully, but higher requirement is arranged on bending property.Bending radius may diminish to 7.5mm.
Along with the G.657 continuous development of fiber optic applications, index to bending loss proposes more and more higher requirement, particularly at the multitenant unit (MDU of FTTH, Multi-Dwelling Unit) and in house wiring (In-HomeWiring) system, manufacturer and client have considered that bending radius need drop to the requirement of 5mm.In order to adapt to new market development, in October, 2009, ITU has increased in standard G.657 and has been used for the new criteria that bending radius is 5mm, and this just means that also inside cable also need have so little bending radius.Usually in the covered wire cable that inside cable adopts, certain rigid is arranged, can't reach so little bending radius as the anti-FRP that opens no part.Therefore for adapting to the more and more higher requirement of crooked index, the structure of covered wire cable must have corresponding variation.
The utility model content
The technical problems to be solved in the utility model is: a kind of covered wire cable of novelty is provided, and this covered wire cable can reach the requirement of small-bend radius.
In order to overcome the defective that exists in the background technology, the technical scheme that its technical matters that solves the utility model adopts is: a kind of covered wire cable of novelty, comprise optical fiber and sheath, described optical fiber is arranged in the sheath, and described optical fiber comprises fibre core, and this fibre core arranged outside has a covering, covering is coated with resinous coat outward, described resinous coat has the hard-pressed bale sheath outward, is provided with 2 optical fiber in the described sheath at least, and the optical fiber bifurcated is arranged in the sheath.
According to another embodiment of the present utility model, a kind of covered wire cable of novelty comprises that further described optical fiber is symmetrically distributed in the two ends of sheath.
According to another embodiment of the present utility model, a kind of covered wire cable of novelty comprises that further described optical cable cross section becomes " 8 " font.
According to another embodiment of the present utility model, a kind of covered wire cable of novelty comprises that further described resinous coat is a UV curing acrylic resinous coat.
According to another embodiment of the present utility model, a kind of covered wire cable of novelty comprises that further described hard-pressed bale sheath is the polyvinyl fluoride layer.
According to another embodiment of the present utility model, a kind of covered wire cable of novelty comprises that further described optical fiber is single-mode fiber or multimode optical fiber.
The utility model has solved the defective that exists in the background technology, the utility model can reach the requirement of small-bend radius, bag sheath by hard-pressed bale has been strengthened mechanical property of the present utility model, the static fatigue of optical fiber has slowed down, improved serviceable life of the present utility model, connected with the joints of optical fibre respectively by adopting dichotomous structure to be convenient to optical fiber.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a covered wire cable structural representation traditional in the prior art;
Fig. 2 is the tightly packaged fiber structural representation of preferred embodiment of the present utility model;
Fig. 3 is the cross-sectional schematic of preferred embodiment of the present utility model;
Wherein: 1, optical fiber, 11, fibre core, 12, covering, 13, coating, 14, the hard-pressed bale sheath, 2, sheath, 3, bare fibre, 4, reinforcing element.
Embodiment
With preferred embodiment the utility model is described in further detail in conjunction with the accompanying drawings now.These accompanying drawings are the synoptic diagram of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
Shown in Fig. 2-3, a kind of covered wire cable of novelty, comprise optical fiber 1 and sheath 2, described optical fiber 1 is arranged in the sheath 2, and described optical fiber 1 comprises fibre core 11, and this fibre core 11 is provided with a covering 12 for side, the covering 12 outer resinous coats 13 that are coated with, outside the described resinous coat 13 hard-pressed bale sheath 14 is arranged, be provided with 2 optical fiber 1 in the described sheath 2 at least, optical fiber 1 bifurcated is arranged in the sheath 2.
The utility model is to squeeze into the sheath 14 of one deck polyvinyl fluoride plastics at optical fiber 1 (comprising that external diameter is the coating of 0.25mm) external application extrusion process, and tightly packaged fiber 1 external diameter is generally, but is not limited to 0.9mm.The optical fiber 1 that adopts can be single-mode fiber, also can be multimode optical fiber, and both external diameters are 125 μ m, and single-mode fiber 1 fibre core 11 diameters are 8.3 μ m, and multimode optical fiber 1 fibre core 11 diameters are 50 or 62.5 μ m.Tightly packaged fiber structure of the present utility model also can adopt other various special multimode optical fibers.
Polyvinyl fluoride (ethylene-tetrafluoroethylene copolymer) is commonly called as: F-40.Its english name is ETFE (ethylene-tetra-fluoro-ethylene).ETFE is the most tough fluoroplastic, it is in the polytetrafluoroethylene (PTFE) that has kept being known as " plastics king " good heat-resisting, chemical-resistance and electrical insulation capability, radiation hardness and mechanical property have significantly to be improved, and pulling strengrth can reach 50MPa, near 2 times of teflon.Main is that its processing characteristics is greatly improved, and can adopt the job operation machine-shaping of common thermoplastics.
The long-term serviceability temperature of ETFE is-80 ℃-220 ℃, and remarkable chemical resistance is arranged, and its creep resistance and compression strenght are all good than teflon, the pulling strengrth height, and length growth rate can reach 100-300%.Dielectricity is good, the radiation resistance excellence.Especially the linear expansion coefficient of ETFE is minimum in the plastics, thereby makes ETFE become the padded coaming of optical fiber the best.
By as seen above-mentioned; the present invention is that modern optical fiber is combined with the thermoplastics of the best in the world with polyvinyl fluoride as buffering, the tightly packaged fiber that strengthens sheath; make tightly packaged fiber itself have enough machinery and environmental protection ability; and need not additional FRP machinery and environmental protection ability independent utility must be arranged as traditional tightly packaged fiber.Especially be pointed out that: optical fiber itself is through the improvement and the development of the manufacturing process of three more than ten years, and its mechanical property comprises that tensile strength and bending property have obtained large increase.The particularly G.657 appearance of optical fiber has improved a step bending property of optical fiber again widely.Different length optical fiber is under same bending radius (bearing corresponding stress), and its fracture probability is diverse.Under same bending radius (bearing corresponding stress), length is shorter, and its fracture probability is lower.This be because, optical fiber is shorter, defective is fewer in the optical fiber, its intensity is also just high.When bending radius was 5mm, the stressed length of optical fiber was less than 8mm, and obviously, the optical fiber of short like this segment length is bearing bending radius when being the stress of 5mm, and its fracture probability only is 3ppm.
Thereby, the utility model with polyvinyl fluoride as buffering, strengthen covered wire cable that the tightly packaged fiber of sheath forms as indoor comprehensive wiring, and as the interconnect of various light devices, optical module and Optical Distribution Frame, it is little to have volume, in light weight, the packaging density height, stable performance, advantage such as with low cost.Twin-core covered wire cable of the present invention is much lower to the machinery and the requirement on environmental protection of stranding, can simplify the structure of inside cable greatly.
Covered wire cable structure of the present invention as shown in Figure 3, wherein optical fiber 1 can adopt the G.657 optical fiber of various grades by request for utilization, sheath 2 can adopt low-smoke halogen-free polyolefin maybe can adopt polyurethane (TPU) plastics.Covered wire cable of the present utility model be manufactured with two procedures: the one, optical fiber 1 hard-pressed bale operation, promptly outside coated fiber 1, squeeze into polyvinyl fluoride hard-pressed bale sheath 14, this operation needs to carry out on the high temperature extruder, and the high temperature extruder needs to work under 350 ℃ temperature and decay resistance is arranged.The 2nd, sheath 2 is extruded operation, when tightly packaged fiber 1 extrudes sheath 2, needs tightly packaged fiber 1 surperficial dip-coating ointment, so that rubber-insulated wire the peeling off of optical fiber when using.
With above-mentioned foundation desirable embodiment of the present utility model is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the instructions, must determine its technical scope according to the claim scope.
Claims (6)
1. the covered wire cable of a novelty, comprise optical fiber and sheath, described optical fiber is arranged in the sheath, it is characterized in that: described optical fiber comprises fibre core, this fibre core arranged outside has covering, and covering is coated with resinous coat outward, and described resinous coat has the hard-pressed bale sheath outward, at least be provided with 2 optical fiber in the described sheath, the optical fiber bifurcated is arranged in the sheath.
2. the covered wire cable of a kind of novelty as claimed in claim 1, it is characterized in that: described optical fiber is symmetrically distributed in the two ends of sheath.
3. the covered wire cable of a kind of novelty as claimed in claim 1 is characterized in that: described optical cable cross section one-tenth " 8 " font.
4. the covered wire cable of a kind of novelty as claimed in claim 1, it is characterized in that: described resinous coat is a UV curing acrylic resinous coat.
5. the covered wire cable of a kind of novelty as claimed in claim 1, it is characterized in that: described hard-pressed bale sheath is the polyvinyl fluoride layer.
6. the covered wire cable of a kind of novelty as claimed in claim 1, it is characterized in that: described optical fiber is single-mode fiber or multimode optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205898437U CN201837759U (en) | 2010-11-01 | 2010-11-01 | Novel rubber-covered cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205898437U CN201837759U (en) | 2010-11-01 | 2010-11-01 | Novel rubber-covered cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201837759U true CN201837759U (en) | 2011-05-18 |
Family
ID=44007866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205898437U Expired - Lifetime CN201837759U (en) | 2010-11-01 | 2010-11-01 | Novel rubber-covered cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201837759U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102375194A (en) * | 2011-12-02 | 2012-03-14 | 江苏七宝光电集团有限公司 | Rubber-insulated wire optical cable |
| CN102385128A (en) * | 2011-12-02 | 2012-03-21 | 江苏七宝光电集团有限公司 | Rubber-insulated wire lead-in optical cable |
-
2010
- 2010-11-01 CN CN2010205898437U patent/CN201837759U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102375194A (en) * | 2011-12-02 | 2012-03-14 | 江苏七宝光电集团有限公司 | Rubber-insulated wire optical cable |
| CN102385128A (en) * | 2011-12-02 | 2012-03-21 | 江苏七宝光电集团有限公司 | Rubber-insulated wire lead-in optical cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110518 |