CN107357016B - Loose tube and low-temperature-resistant air-blowing miniature optical cable - Google Patents
Loose tube and low-temperature-resistant air-blowing miniature optical cable Download PDFInfo
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- CN107357016B CN107357016B CN201710785824.8A CN201710785824A CN107357016B CN 107357016 B CN107357016 B CN 107357016B CN 201710785824 A CN201710785824 A CN 201710785824A CN 107357016 B CN107357016 B CN 107357016B
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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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Abstract
The invention provides a loose tube and a low-temperature-resistant air-blowing miniature optical cable, and relates to the technical field of optical cable communication. The utility model provides a loose tube, includes the body, sets up in the inside optic fibre of body and the fine cream of low temperature resistant, and the fine cream of low temperature resistant fills in the inside of body, and optic fibre accounts for 40 ~ 60% of the inner space of body. The low temperature resistance is good, and the application in the environment of minus 65 to minus 50 ℃ can be realized. The utility model provides a low temperature resistant air-blowing miniature optical cable, includes the cable core structure, sets up in the outer sheath of cable core structure, and the cable core structure comprises reinforcement and above-mentioned loose tube, and the loose tube sets up in the periphery of reinforcement. Easy installation, light weight, low temperature resistance and can be applied in the environment of minus 65 to minus 50 ℃.
Description
Technical Field
The invention relates to the technical field of optical cable communication, in particular to a loose tube and a low-temperature-resistant air-blowing miniature optical cable.
Background
In recent years, along with the deepening implementation of the strategy of 'broadband China' and the positive promotion of the information strategy, the network becomes a very important information transmission way in China. Accordingly, the development of optical cables has been advanced, and the optical cables are developed to a special type, a light weight type, and a large capacity type structure. In the access network, there are many joints and branches between the exchange and the subscriber, and the technology of the air-blowing micro-cable system is brought along in order not to interfere with the opened route when connecting a new subscriber. The technology is a new optical cable air-blowing distribution technology, and firstly blows micro-pipes into laid mother pipes, and then respectively blows micro-cables of different types into the micro-pipes according to the requirements of customers in different periods.
The air-blowing micro optical cable is developed rapidly and widely applied, and can meet the current situation of resource shortage at home and abroad. The number of the traditional air-blown micro optical cable cores is 288 cores at most, the traditional air-blown micro optical cable cores are widely applied to various regions, and after years of application and practice, the traditional air-blown micro optical cable cores have found great problems. For example, after entering cold winter in northern Europe and northeast China, the lowest temperature of the regions can reach minus dozens of degrees, and the traditional air-blowing micro cable cannot be applied to the environment. The development of the ultra-low temperature resistant air-blowing micro optical cable plays an important role in the areas.
Disclosure of Invention
The invention aims to provide a loose tube which has good low-temperature resistance and can be applied to the environment of-65 to-50 ℃.
The invention also aims to provide a low-temperature-resistant air-blowing miniature optical cable which is easy to install, light in weight and low-temperature-resistant and can be applied to the environment of-65 to-50 ℃.
The embodiment of the invention is realized by the following steps:
the utility model provides a loose tube, includes the body, sets up in the inside optic fibre of body and the fine cream of low temperature resistant, and the fine cream of low temperature resistant fills in the inside of body, and optic fibre accounts for 40 ~ 60% of the inner space of body.
Further, in the preferred embodiment of the present invention, the diameter of the optical fiber is 180 to 220 μm.
Further, in a preferred embodiment of the present invention, the optical fiber is a dispersion fiber, and the number of cores of the optical fiber is 2 to 24 cores.
Further, in a preferred embodiment of the present invention, the raw materials for preparing the low temperature resistant fiber paste comprise: natural silicone oil or synthetic oil, lubricant and water removing agent.
Further, in a preferred embodiment of the present invention, the weight percentage of the natural silicone oil or the synthetic oil is 70-85%, the weight percentage of the lubricant is 10-15%, and the weight percentage of the water removing agent is 5-15%.
Further, in a preferred embodiment of the invention, the moisture content of the low temperature resistant fiber paste is less than 2%.
The utility model provides a low temperature resistant air-blowing miniature optical cable, includes the cable core structure, sets up in the outer sheath of cable core structure, and the cable core structure comprises reinforcement and above-mentioned loose tube, and the loose tube sets up in the periphery of reinforcement.
Further, in a preferred embodiment of the present invention, the outer surface of the stiffener is provided with a stiffener pad.
Further, in a preferred embodiment of the present invention, the low temperature air-blowing resistant micro optical cable further comprises a water-blocking aramid fiber, and the water-blocking aramid fiber is disposed on the outer surface of the reinforcement pad layer in a winding manner.
Further, in a preferred embodiment of the present invention, the low temperature air-blowing resistant micro optical cable further includes a tear string disposed between the loose tube and the sheath.
The embodiment of the invention has the following beneficial effects:
the invention provides a loose tube and a low-temperature-resistant air-blowing miniature optical cable, wherein low-temperature-resistant fiber paste is filled in the loose tube, so that the loose tube can be applied to an environment of-65 to-50 ℃. The optical fiber with the diameter of 180-220 mu m is arranged in the loose tube, the small diameter can effectively improve the free space in the tube body, and when the tube body shrinks under the low-temperature environment, the optical fiber is guaranteed to have enough movable space, so that the normal work of the optical fiber is guaranteed.
The low-temperature-resistant air-blowing micro optical cable comprises the loose tube, is easy to install, light in weight and low-temperature-resistant, and can be applied to the environment of-65 to-50 ℃. The optical cable also comprises a reinforcing piece and a reinforcing piece cushion layer, so that the tensile resistance and the bending resistance of the optical cable are ensured; the tearing rope enhances the tensile capacity of the optical cable, reduces the damage rate and is convenient for pulling the sheath open during construction.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a loose tube provided in embodiment 1 of the present invention;
FIG. 2 is a schematic structural diagram of a low temperature-resistant air-blowing micro optical cable provided in example 2 of the present invention;
FIG. 3 is a schematic structural diagram of a low temperature-resistant air-blowing micro optical cable provided in embodiment 3 of the present invention;
fig. 4 is a schematic structural diagram of a low temperature-resistant air-blowing micro optical cable provided in embodiment 4 of the present invention.
Icon: 100-loose tubes; 110-a tube body; 120-an optical fiber; 130-low temperature resistant fiber paste; 200-low temperature resistant air-blown micro optical cable; 210-cable core structure; 211-a reinforcement; 213-reinforcement mat layer; 220-a sheath; 300-low temperature resistant air-blown micro optical cable; 310-water-blocking aramid fiber; 400-low temperature resistant air-blown micro optical cable; 410-tear string.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally place when used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Example 1
Referring to fig. 1, the present embodiment provides a loose tube 100, which includes a tube body 110, an optical fiber 120, and a low temperature resistant fiber paste 130. The optical fiber 120 is disposed inside the tube 110, and the low temperature resistant fiber paste 130 is filled inside the tube 110.
The optical fiber 120 in the conventional optical fiber 120 sleeve occupies 60-80% of the space, and when the ambient temperature is reduced, the sleeve is shrunk, the moving space of the optical fiber 120 is reduced, and quality accidents are easily caused. In order to ensure that the optical fiber 120 can move freely in the sleeve in a low temperature environment, in this embodiment, the optical fiber 120 occupies 40 to 60% of the inner space of the tube body 110, and the movable space of the optical fiber 120 in the tube body 110 is increased, so that the optical fiber 120 can still work normally in the low temperature environment.
As one implementation, selecting the optical fiber 120 with a small diameter not only can effectively increase the free space in the tube 110, but also has little effect on the performance of the optical fiber 120. In the present embodiment, the diameter of the optical fiber 120 is 180 to 220 μm. In other embodiments of the present invention, the diameter of the optical fiber 120 may have other values, which are not limited by the present invention.
As another way of accomplishing this, the tube diameter wall thickness of the loose tube 100 is reduced to increase the free space within the tube body 110. Preferably, can reduce the pipe diameter wall thickness through increasing fine cream flow and reducing the extrusion molding volume, reduce loose 100 unwrapping wire tensions of sleeve pipe simultaneously, the unwrapping wire tension can be 0.8 ~ 1.0N, pricks yarn tension control at 2 ~ 4N.
The currently available optical fiber 120 filling paste can only meet the temperature of forty degrees below zero, and cannot meet the requirements when the temperature is reduced or under extremely cold conditions. The low temperature resistant fiber paste 130 adopted in the embodiment has soft paste under the condition of-65 to-50 ℃.
Specifically, the raw materials for preparing the low temperature resistant fiber paste 130 include: natural silicone oil or synthetic oil, lubricant and water removing agent. Natural silicone oil or synthetic oil is used as base oil, wherein the natural silicone oil has larger molecular weight and good performance; the synthetic oil achieves the performance of low temperature and low viscosity by increasing the number of ether bonds in molecular chains. The base oil has large molecular weight and higher intrinsic viscosity, and the viscosity is increased and the softness is reduced along with the reduction of the temperature. And the base oil has poor identity with the sleeve, so that the lubricant is added to keep the flexibility of the macromolecular chain end and improve the viscosity of the paste at low temperature. The lubricant can be micromolecular silicone oil and has good compatibility with base oil. Further, in order to avoid damage to the optical fiber 120 caused by water condensation in a low-temperature environment, a certain amount of water removing agent is added into the paste to maintain the moisture content of the paste. In the present embodiment, the moisture content of the low temperature resistant fiber paste 130 is less than 2%.
In the embodiment, the raw materials comprise, by mass, 70-85% of natural silicone oil or synthetic oil, 10-15% of a lubricant, and 5-15% of a water removal agent. The low temperature resistant fiber paste 130 prepared according to the proportion has good low temperature resistance, and the paste keeps soft under the condition of-65 to-50 ℃.
In the present embodiment, the optical fiber 120 is a colored light scattering fiber, and the number of cores of the optical fiber 120 is 2 to 24 cores. The loose tube 100 formed by the optical fiber 120 has stable transmission performance, and meets the actual requirements. The body 110 of the loose tube 100 is made of polybutylene terephthalate (PET), which is light in weight, non-toxic, good in heat-resistant and aging-resistant properties, good in electrical insulation properties, and less affected by temperature. PET allows the loose tube 100 to be used in a low temperature environment, expanding the range of use of the loose tube 100.
Example 2
Referring to fig. 2, the present embodiment provides a low temperature blowing resistant micro optical cable 200, which includes a cable core structure 210 and a sheath 220 disposed on an outer layer of the cable core structure 210.
The cable core structure 210 is composed of a reinforcing member 211 and the loose tube 100. In this embodiment, the reinforcing member 211 is disposed at the center of the cable core structure 210, and plays a role of bearing load. The reinforcement 211 may be a metal reinforcement or a non-metal reinforcement, which is not limited in the present invention.
The loose tube 100 is disposed at the outer circumference of the reinforcing member 211, and the axis of the reinforcing member 211 and the axis of the loose tube 100 are parallel to each other, i.e., disposed at equal intervals around the reinforcing member 211. The structure is stable, and the normal operation of the optical fiber 120 is ensured. In this embodiment, the number of the loose tubes 100 is 8, and in other embodiments of the present invention, the number and arrangement of the loose tubes 100 may be adjusted according to the size of the low temperature blowing resistant micro optical cable 200, which is not limited in the present invention.
The sheath 220 serves as a protection layer to protect the cable core structure 210, and in this embodiment, the sheath 220 is made of a single-layer or double-layer co-extruded material made of polyethylene, nylon, a light treatment agent and the like, and has the properties of light weight, aging resistance, ultraviolet resistance and the like.
For simplification, please refer to example 1 for corresponding contents, where nothing is mentioned in this example.
Example 3
Referring to fig. 3, the present embodiment provides a low temperature resistant air-blowing micro optical cable 300.
The difference between the low temperature resistant air-blown micro optical cable 300 and the low temperature resistant air-blown micro optical cable 200 is mainly as follows:
the outer surface of the reinforcement 211 is provided with a reinforcement pad 213, which further increases the strength of the reinforcement 211 and also serves as a buffer to protect the loose tube 100.
The low-temperature-resistant air-blowing micro optical cable 300 further comprises water-blocking aramid 310, and the water-blocking performance is enhanced. Specifically, the water-blocking aramid 310 is arranged on the outer surface of the cable core structure 210 in a winding manner, and the winding density can be adjusted to change the water-blocking performance. Preferably, the number of the waterproof aramid fibers 310 is even, and the waterproof aramid fibers are symmetrically wound during winding, so that the waterproof performance is ensured.
For the sake of simplicity, please refer to example 2 for corresponding contents, where nothing is mentioned in this example.
Example 4
Referring to fig. 4, the present embodiment provides a low temperature resistant air-blowing micro optical cable 400.
The difference between the low temperature resistant air-blown micro optical cable 400 and the low temperature resistant air-blown micro optical cable 300 is mainly as follows:
the low temperature air-blowing resistant micro optical cable 400 further includes a ripcord 410, and the ripcord 410 is disposed between the loose tube 100 and the sheath 220. The tearing rope 410 enhances the anti-pulling capacity of the low-temperature-resistant air-blowing micro optical cable 400, and reduces the damage rate; the heat emitted by the low-temperature-resistant air-blowing micro optical cable 400 in the using process can be absorbed, and the sheath 220 is convenient to pull open in construction.
The embodiment further provides a low temperature resistant air-blowing micro optical cable system (not shown) based on the low temperature resistant air-blowing micro optical cable 400, which comprises the low temperature resistant air-blowing micro optical cable 400 and a fiber paste pump (not shown). Because the viscosity of the low-temperature resistant fiber paste 130 is low, only a small-dose pump needs to be prepared, and the small-dose pump can accurately control the flow rate of the fiber paste in the pipe body 110, so that the product performance is improved, the cost is saved, and the production efficiency is improved.
In this embodiment, the fiber paste pump is a general device in the technical field, and the structure of the fiber paste pump is not limited in the invention.
For the sake of simplicity, please refer to example 3 for corresponding contents, where nothing is mentioned in this example.
In summary, the invention provides the loose tube 100 and the low temperature resistant air blowing micro optical cables 200, 300 and 400, and the loose tube 100 is filled with the low temperature resistant fiber paste 130, so that the loose tube 100 can be applied to an environment of-65 to-50 ℃. The optical fiber 120 with the diameter of 180-220 μm is arranged in the loose tube 100, the small diameter can effectively improve the free space in the tube body 110, and when the tube body 110 shrinks under the low-temperature environment, the optical fiber 120 is ensured to have enough movable space, so that the optical fiber 120 can work normally.
The low-temperature-resistant air-blowing miniature optical cable 200, 300 and 400 comprises the loose tube 100, is easy to install, light in weight and low-temperature-resistant, and can be applied to the environment of-65 to-50 ℃. The optical cable further comprises a reinforcing piece 211 and a reinforcing piece cushion layer 213, so that the tensile resistance and the bending resistance of the optical cable 120 are ensured; the ripcord 410 enhances the anti-pulling ability of the low temperature resistant air-blown micro optical cable 400, reduces the damage rate, and facilitates the pulling apart of the sheath 220 during construction.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The loose tube is characterized by comprising a tube body, optical fibers and low-temperature-resistant fiber paste, wherein the optical fibers and the low-temperature-resistant fiber paste are arranged inside the tube body, the low-temperature-resistant fiber paste is filled inside the tube body, the optical fibers account for 40-60% of the inner space of the tube body, and the diameters of the optical fibers are 180-220 micrometers;
the low-temperature-resistant fiber paste is prepared from the following raw materials in percentage by mass: 70-85% of natural silicone oil or synthetic oil, 10-15% of lubricant and 5-15% of water removal agent.
2. The loose tube of claim 1, wherein the optical fiber is a dispersion fiber, and the number of cores of the optical fiber is 2-24 cores.
3. The loose tube of claim 1, wherein the low temperature resistant fiber paste has a moisture content of less than 2%.
4. A low-temperature-resistant air-blowing miniature optical cable is characterized by comprising a cable core structure and a sheath arranged on the outer layer of the cable core structure, wherein the cable core structure is composed of a reinforcing part and the loose tube of any one of claims 1 to 3, and the loose tube is arranged on the periphery of the reinforcing part.
5. The low temperature blowing resistant micro optical cable of claim 4, wherein the outer surface of the strength member is provided with a strength member cushion layer.
6. The low temperature air blowing resistant micro optical cable according to claim 5, further comprising a water-blocking aramid disposed in a wound form on an outer surface of the strength member mat layer.
7. The low temperature blowing resistant micro optical cable of claim 4, further comprising a tear cord disposed between the loose tube and the sheath.
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| CN201710785824.8A CN107357016B (en) | 2017-09-04 | 2017-09-04 | Loose tube and low-temperature-resistant air-blowing miniature optical cable |
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| CN201710785824.8A CN107357016B (en) | 2017-09-04 | 2017-09-04 | Loose tube and low-temperature-resistant air-blowing miniature optical cable |
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| CN107357016B true CN107357016B (en) | 2020-01-14 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108957668A (en) * | 2018-09-28 | 2018-12-07 | 江苏亨通光电股份有限公司 | A kind of reinforced ant proof air-blowing micro-cable and its manufacture craft |
| CN112630909A (en) * | 2020-12-25 | 2021-04-09 | 江苏亨通光电股份有限公司 | Festoon optical cable |
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| CN101061408A (en) * | 2004-09-27 | 2007-10-24 | 普雷斯曼电缆及系统能源有限公司 | Optical cable for communication |
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| CN207488562U (en) * | 2017-09-04 | 2018-06-12 | 江苏亨通光电股份有限公司 | Loose tube, low temperature resistant air-blowing minisize optical cable and its system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125216B (en) * | 2016-07-01 | 2023-06-23 | 江苏亨通光电股份有限公司 | High-grade flame-retardant fire-resistant optical cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS62116907A (en) * | 1985-11-18 | 1987-05-28 | Sumitomo Electric Ind Ltd | Waterproof type optical fiber cable |
| CN101061408A (en) * | 2004-09-27 | 2007-10-24 | 普雷斯曼电缆及系统能源有限公司 | Optical cable for communication |
| CN105301714A (en) * | 2014-06-25 | 2016-02-03 | 上海鸿辉光通科技股份有限公司 | Micro-cable optical fiber filling paste and preparation method therefor |
| CN106125234A (en) * | 2016-08-23 | 2016-11-16 | 江苏亨通光电股份有限公司 | A kind of large core number little cable footpath anti-ant air-blowing micro-cable and processing technology thereof |
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