CN114167563A - Low-shrinkage central tube type air-blowing micro cable - Google Patents
Low-shrinkage central tube type air-blowing micro cable Download PDFInfo
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- CN114167563A CN114167563A CN202111527876.8A CN202111527876A CN114167563A CN 114167563 A CN114167563 A CN 114167563A CN 202111527876 A CN202111527876 A CN 202111527876A CN 114167563 A CN114167563 A CN 114167563A
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- layer
- loose sleeve
- cable
- central tube
- transmission unit
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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
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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
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- 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 air-blowing micro cable. The method is characterized in that: the optical transmission unit layer, the loose sleeve layer and the outer protective layer are arranged; the optical transmission unit layer is provided with one or more optical fibers; the loose sleeve layer is arranged on the outer surface of the optical transmission unit layer; the outer protective layer is coated on the outer surface of the loose sleeve layer. The loose layer of the micro cable is made of special materials and is designed by a process, so that the micro cable has small shrinkage rate in a high-cold environment, and the technical problem that the optical cable is not low-temperature resistant is solved. The optical cable has the characteristics of small outer diameter, light weight, excellent air blowing performance and the like, 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 air-blowing micro cable.
Background
With the continuous development of the information era, the optical network construction needs to be upgraded and modified continuously, and a plurality of new requirements are also put forward on optical cable products. With the increase of the coverage density of the optical network, the laying of the optical fiber cable is limited by the scarcity of pipeline resources, and meanwhile, the laying cost is further increased due to the increase of labor cost. In order to meet the requirement of the development of times, the air-blowing micro-cable is small in size and high in optical fiber density, can be laid in an air-blowing mode, effectively improves the pipeline resource utilization rate, reduces the labor cost, improves the construction efficiency, and has huge market competitive advantages. Therefore, the air-blown micro-cable product with smaller size and more superior air-blown performance, mechanical performance and environmental performance needs to be designed and developed so as to meet the technical requirements of various laying environments and 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 air-blowing micro cable. The micro cable is simple in structure, only the loose sleeve layer and the outer sheath are coated outside the optical fiber, and the loose sleeve and the sheath shrink easily at low temperature due to the fact that the structure is free of the reinforcing part for supporting, so that the optical fiber attenuation exceeds the standard. Based on the structural characteristics and the technical difficulties of the micro cable, the invention adopts double-layer co-extrusion of the PC + ABS material and the PBT material on the design of the loose sleeve layer of the micro cable, so that the loose sleeve layer has better formability of the ABS material, good mechanical property and temperature resistance of the PC material, good flexibility and hydrolysis resistance of the PBT material, and excellent temperature property and tensile strength of the micro cable, thereby solving the technical problems of low temperature resistance, tensile strength and the like of the optical cable. The optical cable also has the characteristics of small outer diameter, light weight, excellent air blowing performance and the like, and is suitable for various indoor and outdoor wiring occasions.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a low shrink central tube formula air-blowing micro cable which characterized in that: the optical transmission unit layer, the loose sleeve layer and the outer protective layer are arranged; the loose sleeve layer is arranged on the outer surface of the optical transmission unit layer; the outer protective layer is coated on the outer surface of the loose sleeve layer.
A low shrink central tube formula air-blowing micro cable its characterized in that: the optical transmission unit layer is composed of one or more optical fibers, and the surface of each optical fiber is identified by different colors of the coloring layers.
A low shrink central tube formula air-blowing micro cable its characterized in that: 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 water is blocked by filling a water blocking compound in the gap between the loose sleeve layer and the optical transmission unit layer.
A low shrink central tube formula air-blowing micro cable its characterized in that: the outer protective layer is formed by plastic through extrusion and is coated on the outer surface of the loose tube layer, and the outer edge of the outer protective layer is of a zigzag structure; and two water-blocking yarns are wound between the outer protective layer and the loose sleeve layer in a crossed manner to block water.
A low shrink central tube formula air-blowing micro cable its characterized in that: one or more tearing ropes are longitudinally arranged between the outer protective layer and the loose sleeve layer.
Compared with the prior art, the invention has the beneficial effects that:
1. the PC + ABS material and PBT material double-deck crowded altogether are adopted to the fine cable pine cover layer, make the pine cover layer possess better temperature characteristic and mechanical properties, have solved this type optical cable and have not low temperature resistant technological problem, and compare traditional optical cable structure and can further reduce the use of supplementary reinforcement, make the structure and the processing technology of optical cable simpler, the size and the weight of optical cable are also littleer, and the cost of manufacture is also cheaper.
2. The utility model discloses a little cable outer jacket adopts the zigzag design, can effectively reduce the area of contact between sheath and the pipe wall when the air-blowing lays to reduce frictional force, also can increase the area of contact between sheath and the gas, drag power when increasing the air-blowing has effectively promoted little cable air-blowing performance, has improved the efficiency of construction.
3. The micro cable adopts the design of an all-dielectric structure, can be suitable for a strong lightning area or laid in the same channel with a cable, is suitable for various indoor and outdoor wiring occasions, is convenient and quick to use, and can also be used as an emergency optical cable when an optical cable line is blocked.
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, which is a schematic view of a preferred embodiment of the present invention, the present invention relates to a low shrinkage central tube type air blown micro cable, characterized in that: the optical transmission unit layer 1, the loose tube layer 2 and the outer protective layer 3 are arranged; the loose sleeve layer 2 is arranged on the outer surface of the optical transmission unit layer 1; the outer sheath 3 is coated on the outer surface of the loose sheath layer.
As shown in fig. 1, the optical transmission unit layer 1 has one or more optical fibers, and the surface of the optical fiber is identified by different colors of colored layers.
As shown in fig. 1, the loose layer 2 is composed of a PC + ABS mixed layer 4 and a PBT layer 5, 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 water is blocked in the gap between the loose sleeve layer 2 and the optical transmission unit layer 1 by filling a water blocking compound 6.
As shown in fig. 1, the outer protective layer 3 is formed by extruding plastic and is coated on the outer surface of the loose sleeve layer 2, and the outer edge of the outer protective layer is of a zigzag structure; two water-blocking yarns 7 are wound between the outer protective layer 3 and the loose sleeve layer 2 in a crossed manner to block water.
As shown in figure 1, one or more tearing ropes 8 are longitudinally arranged between the outer protective layer 3 and the loose tube layer 2.
Compared with the prior art, the invention has the beneficial effects that:
1. the PC + ABS material and PBT material double-deck crowded altogether are adopted to the fine cable pine cover layer, make the pine cover layer possess better temperature characteristic and mechanical properties, have solved this type optical cable and have not low temperature resistant technological problem, and compare traditional optical cable structure and can further reduce the use of supplementary reinforcement, make the structure and the processing technology of optical cable simpler, the size and the weight of optical cable are also littleer, and the cost of manufacture is also cheaper.
2. The utility model discloses a little cable outer jacket adopts the zigzag design, can effectively reduce the area of contact between sheath and the pipe wall when the air-blowing lays to reduce frictional force, also can increase the area of contact between sheath and the gas, drag power when increasing the air-blowing has effectively promoted little cable air-blowing performance, has improved the efficiency of construction.
3. The optical cable adopts the design of the all-dielectric structure, can be suitable for strong thunder and lightning district or lay with the cable in the same ditch, is applicable to multiple indoor and outdoor wiring occasions, and convenient to use is swift, also can regard as emergent optical cable to use when the optical cable circuit takes place to block. 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 (5)
1. The utility model provides a low shrink central tube formula air-blowing micro cable which characterized in that: the optical transmission unit layer (1), the loose tube layer (2) and the outer protective layer (3) are arranged; the loose sleeve layer (2) is arranged on the outer surface of the optical transmission unit layer (1); the outer protective layer (3) is coated on the outer surface of the loose sleeve layer.
2. A low shrinkage central tube air blown micro cable as claimed in claim 1, wherein: the optical transmission unit layer (1) is composed of one or more optical fibers, and the surfaces of the optical fibers are identified by different colors of coloring layers.
3. A low shrinkage central tube air blown micro cable as claimed in claim 1, wherein: the loose sleeve layer (2) is composed of a PC + ABS mixed layer (4) and a PBT layer (5), 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 water is blocked by filling a water blocking compound (6) in a gap between the loose sleeve layer (2) and the optical transmission unit layer (1).
4. A low shrinkage central tube air blown micro cable as claimed in claim 1, wherein: the outer protective layer (3) is formed by extruding plastics and is coated on the outer surface of the loose sleeve layer (2), and the outer edge of the outer protective layer is of a zigzag structure; two water-blocking yarns (7) are wound between the outer protective layer (3) and the loose sleeve layer (2) in a crossed manner to block water.
5. A low shrinkage central tube air blown micro cable as claimed in claim 1, wherein: one or more tearing ropes (8) are longitudinally arranged between the outer protective layer (3) and the loose sleeve layer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111527876.8A CN114167563A (en) | 2021-12-15 | 2021-12-15 | Low-shrinkage central tube type air-blowing micro cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111527876.8A CN114167563A (en) | 2021-12-15 | 2021-12-15 | Low-shrinkage central tube type air-blowing micro cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114167563A true CN114167563A (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111527876.8A Pending CN114167563A (en) | 2021-12-15 | 2021-12-15 | Low-shrinkage central tube type air-blowing micro cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115685466A (en) * | 2022-11-14 | 2023-02-03 | 长飞光纤光缆股份有限公司 | Central beam tube air-blowing micro cable, extrusion die and preparation method |
-
2021
- 2021-12-15 CN CN202111527876.8A patent/CN114167563A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115685466A (en) * | 2022-11-14 | 2023-02-03 | 长飞光纤光缆股份有限公司 | Central beam tube air-blowing micro cable, extrusion die and preparation method |
| CN115685466B (en) * | 2022-11-14 | 2023-12-19 | 长飞光纤光缆股份有限公司 | Central beam tube air-blowing micro cable and preparation method thereof |
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