CN114137676A - Low-shrinkage central tube type ribbon optical cable - Google Patents
Low-shrinkage central tube type ribbon optical cable Download PDFInfo
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- CN114137676A CN114137676A CN202111443120.5A CN202111443120A CN114137676A CN 114137676 A CN114137676 A CN 114137676A CN 202111443120 A CN202111443120 A CN 202111443120A CN 114137676 A CN114137676 A CN 114137676A
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- optical fiber
- optical cable
- central tube
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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
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
-
- 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
- G02B6/4403—Optical cables with ribbon structure
- G02B6/4404—Multi-podded
-
- 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
- G02B6/4417—High voltage aspects, e.g. in cladding
-
- 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
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
-
- 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
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention relates to the technical field of optical fiber cables, in particular to a low-shrinkage central tube type ribbon optical cable. The method is characterized in that: the optical transmission unit layer, the loose tube layer, the reinforcing layer and the outer protective layer are arranged; the optical transmission unit layer is provided with a plurality of optical fiber ribbons; the loose sleeve layer is arranged on the outer surface of the optical transmission unit layer; the reinforced layer is composed of a plurality of aramid yarns; the outer protecting layer is coated on the outer surface of the reinforcing layer. The loose sleeve layer of the optical cable is designed by adopting special materials and processes, so that the shrinkage rate of the optical cable is small in high and cold environments, and the technical problem that the optical cable is not low-temperature resistant is solved; the optical cable adopts a central tube type strip design, and the design optimization is carried out in a strip-overlapping mode of the optical fiber strips, so that the optical fiber density of the optical cable is improved; the optical cable has the characteristics of large core number, small outer diameter, light weight and the like, has excellent performance indexes, is suitable for various indoor and outdoor wiring occasions, and has higher popularization and application values.
Description
Technical Field
The invention relates to the technical field of optical fiber cables, in particular to a low-shrinkage central tube type ribbon optical cable.
Background
With the rapid development of the communication information era, the optical network construction needs to be continuously upgraded and modified. The optical communication network gradually develops towards the direction of high capacity and high speed, the data center is continuously upgraded and expanded, the requirement of network bandwidth is further increased, the network architecture is also promoted to continuously generate new changes, the laying of the optical fiber cable is further limited by the nervous pipeline resources and the expensive labor cost, in order to meet the requirement of times development, the high-density and high-capacity optical fiber cable product generates huge market demand, and the improvement of the utilization rate of the pipeline resources and the construction convenience become one of the key points which must be considered in the design and development of the optical fiber cable product at the present stage. Therefore, at present, the development of optical cable products with large core number and high optical fiber density and capable of meeting various laying environment requirements is urgently needed to meet the technical requirements of optical communication network construction.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a low-shrinkage central tube type ribbon optical cable. The optical cable loose sleeve layer is formed by double-layer co-extrusion of a PC + ABS material and a PBT material, so that the loose sleeve layer has better temperature characteristic and tensile strength, and the technical problem that the optical cable of the type is not low-temperature resistant is solved; the optical cable adopts a central tube type strip design, and the design optimization is carried out in a strip-overlapping mode of the optical fiber strips, so that the optical fiber density of the optical cable is improved; the optical cable has the characteristics of large core number, small outer diameter, light weight and the like, has excellent performance indexes, and is suitable for various indoor and outdoor wiring occasions.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low shrinkage central tube type ribbon optical cable is characterized in that: the optical transmission unit layer, the loose tube layer, the reinforcing layer and the outer protective layer are arranged; the optical transmission unit layer is provided with a plurality of optical fiber ribbons; the loose sleeve layer is arranged on the outer surface of the optical transmission unit layer; the reinforced layer is composed of a plurality of aramid yarns; the outer protecting layer is coated on the outer surface of the reinforcing layer.
The optical transmission unit layer is an optical fiber ribbon array formed by overlapping a plurality of optical fiber ribbons, the arrangement sequence of the optical fiber ribbons in the optical fiber ribbon array is gradually decreased from the middle to two sides from large to small according to the core number of the optical fiber ribbons, and bilaterally symmetrical gradients are formed, so that the edge fiber connecting line of each optical fiber ribbon tends to be circular, the internal space of the loose sleeve layer is fully utilized, and the optical fiber density is effectively improved.
The loose sleeve layer is composed of a PC + ABS mixed layer and a PBT layer, the materials are PC + ABS mixed plastic and PBT plastic, a double-layer co-extrusion process is adopted, and the materials are integrally extruded and molded through an extrusion molding die; and the gap between the loose sleeve layer and the optical transmission unit layer is blocked by longitudinally wrapping a water blocking tape.
The reinforced layer is formed by wrapping a plurality of aramid yarns, and at least 2 water-blocking yarns are alternately distributed between the reinforced layer and the loose sleeve layer for blocking water.
The outer protective layer is formed by plastic in an extrusion mode and is coated on the outer surface of the reinforcing layer.
And a tearing rope is longitudinally arranged between the outer protective layer and the reinforcing layer.
Compared with the prior art, the invention has the beneficial effects that:
1. the optical cable loose sleeve layer is formed by double-layer co-extrusion of a PC + ABS material and a PBT material, so that the loose sleeve layer has good temperature characteristic and tensile strength, and the technical problem that the optical cable is not low-temperature resistant is solved.
2. The optical cable adopts the design of central tube banding, and the design optimization is carried out to the band mode of overlapping of optic fibre band, has further promoted the optic fibre density of optical cable.
3. The optical cable reinforcing layer is formed by wrapping a plurality of aramid yarns, so that the optical cable has excellent tensile property and good flexibility; the optical cable is designed in a full-dielectric structure and is suitable for the same-rod erection of a lightning area or a strong electric area and the cable; the optical cable has the characteristics of large core number, small outer diameter, light weight and the like, has excellent performance indexes, and is suitable for various indoor and outdoor wiring occasions.
4. The optical cable adopts the full-dry type design that blocks water, not only satisfies the performance requirement that blocks water, and the clean time of the back joint is opened and stripped to further save the optical cable moreover, has promoted the efficiency of construction, still environmental protection more.
Description of the drawings:
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention.
The specific implementation mode is as follows:
the conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Referring to FIG. 1, a schematic view of a preferred embodiment of the present invention is directed to a low shrinkage central tube ribbon cable, comprising: the optical transmission unit layer 1, the loose tube layer 2, the reinforcing layer 3 and the outer protective layer 4 are arranged; the optical transmission unit layer 1 has a plurality of optical fiber ribbons; the loose sleeve layer 2 is arranged on the outer surface of the optical transmission unit layer 1; the reinforcing layer 3 is composed of a plurality of aramid yarns; the outer protective layer 4 is coated on the outer surface of the reinforcing layer 3.
As shown in fig. 1, the optical transmission unit layer 1 is an optical fiber ribbon array formed by stacking a plurality of optical fiber ribbons together, the arrangement sequence of the optical fiber ribbons in the optical fiber ribbon array is gradually decreased from the middle to two sides from the large core number of the optical fiber ribbons to form bilaterally symmetrical gradients, so that the connection line of the edge fibers of each optical fiber ribbon tends to be circular, the internal space of the loose layer 2 is fully utilized, and the optical fiber density is effectively improved.
As shown in fig. 1, the loose layer 2 is composed of a PC + ABS mixed layer 5 and a PBT layer 6, and is integrally formed by extrusion through an extrusion mold by using a double-layer co-extrusion process using PC + ABS mixed plastic and PBT plastic; and the gap between the loose sleeve layer 2 and the optical transmission unit layer 1 is blocked by a longitudinal wrapping water blocking tape 7. .
As shown in fig. 1, the reinforcing layer 3 is formed by wrapping a plurality of aramid yarns, and at least 2 water-blocking yarns 8 are alternately distributed between the reinforcing layer 3 and the loose sleeve layer 2 for water blocking. .
As shown in fig. 1, the outer protective layer 4 is formed by extruding plastic and is coated on the outer surface of the reinforcing layer 3.
As shown in figure 1, a tearing rope 9 is longitudinally arranged between the outer protective layer 4 and the reinforcing layer 3.
Compared with the prior art, the invention has the beneficial effects that:
1. the optical cable loose sleeve layer is formed by double-layer co-extrusion of a PC + ABS material and a PBT material, so that the loose sleeve layer has good temperature characteristic and tensile strength, and the technical problem that the optical cable is not low-temperature resistant is solved.
2. The optical cable adopts the design of central tube banding, and the design optimization is carried out to the band mode of overlapping of optic fibre band, has further promoted the optic fibre density of optical cable.
3. The optical cable reinforcing layer is formed by wrapping a plurality of aramid yarns, so that the optical cable has excellent tensile property and good flexibility; the optical cable is designed in a full-dielectric structure and is suitable for the same-rod erection of a lightning area or a strong electric area and the cable; the optical cable has the characteristics of large core number, small outer diameter, light weight and the like, has excellent performance indexes, and is suitable for various indoor and outdoor wiring occasions.
4. The optical cable adopts the full-dry type design that blocks water, not only satisfies the performance requirement that blocks water, and the clean time of the back joint is opened and stripped to further save the optical cable moreover, has promoted the efficiency of construction, still environmental protection more.
It is to be understood that the foregoing detailed description of the present invention has been provided only for the purpose of illustrating the technical spirit and features of the present invention, and the present invention is not limited thereto.
Claims (6)
1. A low shrinkage central tube type ribbon optical cable is characterized in that: the optical transmission device comprises an optical transmission unit layer (1), a loose tube layer (2), a reinforcing layer (3) and an outer protective layer (4); the optical transmission unit layer (1) is provided with a plurality of optical fiber ribbons; the loose sleeve layer (2) is arranged on the outer surface of the optical transmission unit layer (1); the reinforcing layer (3) is composed of a plurality of aramid yarns; the outer protective layer (4) is coated on the outer surface of the reinforcing layer (3).
2. A low shrinkage central tube ribbon cable as defined in claim 1, wherein: the optical transmission unit layer (1) is an optical fiber ribbon array formed by overlapping a plurality of optical fiber ribbons, and the arrangement sequence of the optical fiber ribbons in the optical fiber ribbon array is gradually decreased from the middle to two sides from large to small according to the core number of the optical fiber ribbons, so that bilaterally symmetrical gradients are formed.
3. A low shrinkage central tube ribbon cable as defined in claim 1, wherein: the loose sleeve layer (2) is composed of a PC + ABS mixed layer (5) and a PBT layer (6), the materials are PC + ABS mixed plastic and PBT plastic, a double-layer co-extrusion process is adopted, and the materials are integrally extruded and molded through an extrusion molding die; the gap between the loose sleeve layer (2) and the optical transmission unit layer (1) is blocked by a longitudinal wrapping water blocking tape (7).
4. A low shrinkage central tube ribbon cable as defined in claim 1, wherein: the reinforced layer (3) is formed by wrapping a plurality of aramid yarns, and at least 2 water-blocking yarns (8) are alternately distributed between the reinforced layer (3) and the loose sleeve layer (2) for water blocking.
5. A low shrinkage central tube ribbon cable as defined in claim 1, wherein: the outer protective layer (4) is formed by extruding plastic and is coated on the outer surface of the reinforcing layer (3).
6. A low shrinkage central tube ribbon cable as defined in claim 1, wherein: and a tearing rope (9) is longitudinally arranged between the outer protective layer (4) and the reinforcing layer (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443120.5A CN114137676A (en) | 2021-11-30 | 2021-11-30 | Low-shrinkage central tube type ribbon optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443120.5A CN114137676A (en) | 2021-11-30 | 2021-11-30 | Low-shrinkage central tube type ribbon optical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114137676A true CN114137676A (en) | 2022-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111443120.5A Pending CN114137676A (en) | 2021-11-30 | 2021-11-30 | Low-shrinkage central tube type ribbon optical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114137676A (en) |
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2021
- 2021-11-30 CN CN202111443120.5A patent/CN114137676A/en active Pending
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