CN217543484U - Layer-stranded fan-shaped loose sleeve structure and optical cable - Google Patents
Layer-stranded fan-shaped loose sleeve structure and optical cable Download PDFInfo
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- CN217543484U CN217543484U CN202221759209.2U CN202221759209U CN217543484U CN 217543484 U CN217543484 U CN 217543484U CN 202221759209 U CN202221759209 U CN 202221759209U CN 217543484 U CN217543484 U CN 217543484U
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Abstract
The utility model discloses a fan-shaped loose sleeve structure of layer hank formula and optical cable belongs to optical cable technical field. Comprises a central reinforcing part and at least two loose tube groups; the single-layer loose tube group comprises a plurality of loose tubes with fan-shaped sections, and the loose tubes are mutually attached to form a round single-layer loose tube group; the single-layer loose tube group is sleeved outside the central reinforcing piece or the inner layer loose tube; water-blocking expansion cable paste is filled between the central reinforcement and the loose tube; the outer surface of the loose tube group at the outermost layer is provided with a plastic-coated armor layer and a sheath layer; the utility model adopts the fan-shaped loose tubes, and the central reinforcing piece and the loose tube group are twisted by adopting an SZ twisting mode, so that the fan-shaped loose tubes tightly surround the central reinforcing piece, the size of the optical cable is greatly reduced, and the use of high polymer materials is reduced; due to the special fan-shaped structure, the cable core is compact in structure and small in gap among the twisted units when the cable core is twisted, and the use of filling water-blocking materials is reduced, so that the purpose of carbon emission reduction is achieved.
Description
Technical Field
The utility model belongs to the technical field of the optical cable, especially, fan-shaped pine sleeve structure of layer stranded and optical cable.
Background
China is a large country for producing and using optical cables, the total length of the optical cables laid in China currently exceeds 5249 kilometers, the total length of the laid optical fibers is about 24 hundred million core kilometers, and the total length of the laid optical fibers accounts for about 48 percent of the total length of the optical fibers laid in the world. With the proposition of new concepts such as the internet of things, cloud computing, smart cities and the like, the usage amount of the optical cable is expected to keep 12% of acceleration every year, and energy conservation, emission reduction and cost saving are always subjects of each optical fiber and optical cable manufacturer.
The conventional optical cable loose tubes are round, gaps among stranded units are large when a cable core is stranded, and a large amount of water-blocking cable paste needs to be filled to ensure the water seepage performance; the production raw materials of the filling cable paste are extracted from petroleum, so that a large amount of resources are wasted.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical defect, the utility model provides a fan-shaped pine sleeve structure of layer stranding and optical cable to solve the problem that the background art relates.
The utility model provides a fan-shaped pine sleeve structure of layer stranded and optical cable, include:
a central reinforcement and at least two loose tube sets; the single-layer loose tube set comprises a plurality of loose tubes with fan-shaped cross sections, and the loose tubes are mutually attached to form a round single-layer loose tube set; the single-layer loose tube group is sleeved outside the central reinforcing piece or the inner-layer loose tube; water-blocking expansion cable paste is filled between the central reinforcing piece and the loose tube; the outer surface of the outermost loose tube group is provided with a plastic-coated armor layer and a sheath layer;
the central reinforcing piece and the loose tube group are stranded in an SZ stranding mode, so that the fan-shaped loose tubes sequentially surround the central reinforcing piece.
Preferably or optionally, the loose tube is made of PBT material.
Preferably or optionally, the excess fiber length of the loose tube is controlled to be 0.4-0.6 per thousand; the diameter of the loose tube is controlled at 2.8mm/24 core.
Preferably or alternatively, the twisting pitch of the loose tube is controlled to be 120-130mm, and the twisting period is 6.
Preferably or optionally, the plastic-coated armor layer is a metal armor layer with a layer of water-blocking expansion cable paste indirectly coated on the surface of the metal armor layer.
Preferably or optionally, two ultra-low shrinkage binding yarns are wound on the surface of the loose tube in the forward and reverse directions.
The utility model discloses still supply an optical cable that adopts foretell layer stranded fan-shaped pine sleeve structure, the pine cover intraductal many communication optical fiber that contains.
Preferably or optionally, the communication optical fiber is a loose fiber which is distributed in a PBT loose tube in a sine shape; or the communication optical fiber is wrapped by yarns with different colors to form a differentiated optical fiber bundle; or, the surface is sprayed with a numbered optical fiber ribbon matrix.
Preferably or optionally, the loose tube is filled with hydrogen-absorbing water-blocking fiber paste.
The utility model relates to a fan-shaped pine sleeve structure of layer-stranding and optical cable compares in prior art, has following beneficial effect: the utility model adopts the fan-shaped loose tubes, the central reinforcing piece and the loose tube group are twisted by adopting an SZ twisting mode, so that the fan-shaped loose tubes tightly surround the central reinforcing piece, the size of the optical cable is greatly reduced, and the use of high polymer materials is reduced; due to the special fan-shaped structure, the cable core is compact in structure and small in gap among the twisted units when the cable core is twisted, and the use of filling water-blocking materials is reduced, so that the purpose of carbon emission reduction is achieved.
Drawings
Fig. 1 is a structural diagram of a fan-shaped loose tube optical cable provided by the present invention.
Fig. 2 is a structural view of a loose fiber fan-shaped loose tube provided by the present invention.
Fig. 3 is a structural diagram of a ribbon matrix fan-shaped loose tube provided by the present invention.
Fig. 4 is a sector loose tube extrusion die provided by the utility model;
fig. 5 is a pair of fan-shaped loose tube cable core transposition separated time board that the utility model provides.
The reference signs are: 1. loosening the sleeve; 11. an optical fiber bundle; 12. hydrogen-absorbing water-blocking fiber paste; 13. dispersing fiber; 14. a fiber ribbon matrix; 2. a central reinforcement; 3. water-blocking expansion paste; 4. ultra-low shrinkage yarn binding; 5. coating a plastic armor layer; 6. a sheath layer.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
Example 1
Referring to fig. 1, a layer stranded fan-shaped loose tube 1 structure and an optical cable include: a central reinforcement 2 and at least two layers of loose tube 1 sets; the single-layer loose tube 1 group comprises a plurality of loose tubes 1 with fan-shaped cross sections, the loose tubes 1 are made of PBT (polybutylene terephthalate) materials, and the materials have good side pressure resistance; a plurality of loose tubes 1 are mutually attached to form a round single-layer loose tube 1 group; the single-layer loose tube 1 group is sleeved outside the central reinforcing piece 2 or the inner layer loose tube 1; water-blocking expansion cable paste is filled between the central reinforcement 2 and the loose tube 1 to ensure the radial water-blocking performance of the optical cable; the outer surface of the outermost loose tube 1 group is provided with a plastic-coated armor layer 5 and a sheath layer 6; the central reinforcement 2 and the loose tube 1 group are stranded in an SZ stranding mode, so that the fan-shaped loose tubes 1 are sequentially wound on the central reinforcement 2, the size of the optical cable is greatly reduced, and the use of high polymer materials is reduced; due to the special fan-shaped structure, the cable core is compact in structure and small in gap among the twisted units when the cable core is twisted, and the use of filling water-blocking materials is reduced, so that the purpose of carbon emission reduction is achieved.
In addition, in the embodiment, a plurality of loose tube 1 sets are designed, so that on one hand, the carrying capacity of the loose tube 1 structure on communication optical fibers can be greatly improved, and the capacity of the optical cable is improved; on the other hand, the improvement guarantees that the spatial arrangement of the loose tubes 1 is even and the tension of the single loose tube 1 is even, and guarantees the roundness of the appearance and the structural stability of the structure of the loose tube 1.
As the fan-shaped loose tube 1 has a special shape, the fan-shaped loose tube 1 is twisted by a common twisting method, so that the twisting effect is poor, in this embodiment, a twisting distribution plate is designed for the fan-shaped loose tube 1, as shown in fig. 5, a circular through hole is arranged at the center of the twisting distribution plate, and is used for fixing the central reinforcement member 2, or the central reinforcement member 2 and the inner layer loose tube 1; the central position of the twisted distributing plate is provided with a fan-shaped through hole for fixing the loose tube 1, so that the fan-shaped loose tube 1 can not be dislocated and deformed during SZ twisting, the fan-shaped loose tube 1 can compactly surround the central reinforcement 2, and then the ultralow shrinkage binding yarn 4 is used for fixing the cable core, thereby ensuring that the cable core is not loose.
In a further embodiment, on the basis of the metal armor layer, the plastic-coated armor layer 5 is indirectly coated with a layer of water-swelling water-blocking expansion cable paste which swells when water exists on the surface of the metal armor layer by using a cable paste indirect coating device so as to prevent water from radially seeping out, then the metal armor layer wraps the surface of the cable core by adopting a longitudinal wrapping process to increase the moisture resistance and the lateral pressure resistance of the optical cable, and finally the plastic-coated armor layer 5 is extruded with a sheath layer 6 of 1.6-1.8mm on the outer layer, wherein the sheath layer 6 is a PE sheath to protect the optical cable from keeping normal transmission characteristics in different environments and ensure the service life and normal communication of the optical cable in a laying environment.
In a further embodiment, two ultra-low shrinkage binding yarns 4 are wrapped around the surface of the loose tube 1 in the front and back directions. The ultra-low shrinkage binding yarns 4 are used for fixing the cable core, so that the cable core is not loose.
Example 2
Based on embodiment 1, referring to fig. 2 to 3, this embodiment adopts the optical cable having the structure of the layer-twisted fan-shaped loose tube 1 described in embodiment 1, and the loose tube 1 contains a plurality of communication optical fibers. The communication optical fiber can be loose fiber 13, and the loose fiber 13 is distributed in the PBT loose tube 1 in a sine shape; the optical fiber bundles 11 can also be used, and each optical fiber bundle 11 is wrapped by yarns with different colors for distinguishing; or may be an optical fiber ribbon matrix 14 (the optical fiber ribbon may be an optical fiber ribbon with the same core number or an optical fiber ribbon with different core numbers, the number is printed on the surface of the optical fiber ribbon for easy distinction, and the hydrogen-absorbing water-blocking fiber paste 12 is filled in the loose tube 1.
In order to facilitate understanding of the technical solution of the optical cable using the structure of the layer-stranded segmental loose tube 1, a brief description is made of the manufacturing method and the manufacturing apparatus thereof: step 1, preparing a fan-shaped loose tube 1: the loose tube 1 is made of PBT material, and the material has good lateral pressure resistance; in order to enable the loose tube 1 to be in a fan shape after being formed, the utility model particularly provides an extrusion die for the fan-shaped loose tube 1, the shape of which is shown in figure 4, the fan-shaped loose tube 1 is ensured to keep the fan-shaped shape after being cooled and formed, and the fan-shaped loose tube 1 contains a plurality of communication optical fibers. Step 2, preparing a fan-shaped loose sleeve 1 cable core: the central reinforcement 2 and the loose tube 1 are fixed by matching with a twisting distribution board, and are twisted in an SZ twisting mode, so that the fan-shaped loose tube 1 sequentially surrounds the central reinforcement 2, and then the cable core is fixed by using the ultralow shrinkage binding yarn 4 (4), thereby ensuring that the cable core is not loose.
Wherein, the excess length of the optical fiber of the loose tube 1 is generally controlled to be 0.4-0.6 per mill, and the diameter of the loose tube 1 is generally controlled to be 2.8mm/24 core; SZ twisting is adopted during cabling and twisting, the twisting pitch is controlled to be about 120-130mm, and the twisting period is 6, so that the requirements of the industry standard on the mechanical performance and the temperature performance of the optical cable can be met.
The optical cable in this embodiment compares the 1 optical cable of circular pine sleeve pipe of traditional structure, the utility model provides an optical cable has following beneficial effect:
1. in the embodiment, the loose tube 1 adopts a fan-shaped structure, the cable core structure is compact, the optical fiber density is high, the use of high polymer materials can be reduced in the production process, and the use of the total high polymer materials can be reduced by about 25%;
2. in the embodiment, the loose tube 1 adopts a fan-shaped structure, so that the compact structure of the cable core can be ensured, meanwhile, the use of the PBT and the hydrogen absorption water-blocking fiber paste 12 can be saved, and compared with the optical cable with the conventional structure in the same specification, the use amount of the PBT and the hydrogen absorption water-blocking fiber paste 12 can be reduced by more than 10%;
3. in the embodiment, the loose tube 1 adopts a fan-shaped structure, the cable core structure is compact, gaps among the twisted units are small, and the water-blocking requirement of the industrial standard can be met only by filling a small amount of water-blocking expansion paste 3; compared with the conventional optical cable structure, the using amount of the cable paste can be reduced by more than 30%;
4. in the embodiment, the loose tube 1 adopts a fan-shaped structure, the optical cable has a compact structure and high optical fiber density, the diameter is reduced by about 18 percent compared with the optical cable with the same specification in a conventional structure, the use of optical cable sheath materials is reduced by about 23 percent, the unit weight of the optical cable is reduced by about 23 percent, and the optical fiber density is improved by about 50 percent.
It should be noted that the various features described in the foregoing embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.
Claims (9)
1. A layer-stranded, fan-shaped, loose tube structure, comprising: a central reinforcement and at least two loose tube sets; the single-layer loose tube group comprises a plurality of loose tubes with fan-shaped sections, and the loose tubes are mutually attached to form a round single-layer loose tube group; the single-layer loose tube group is sleeved outside the loose tube of the central reinforcing piece or the inner layer; water-blocking expansion cable paste is filled between the central reinforcing piece and the loose tube; the outer surface of the loose tube group at the outermost layer is provided with a plastic-coated armor layer and a sheath layer;
the central reinforcing piece and the loose tube group are stranded in an SZ stranding mode, so that the fan-shaped loose tubes sequentially surround the central reinforcing piece.
2. The layer stranded fan shaped loose tube structure of claim 1, wherein the loose tube is made of PBT material.
3. The layer stranded fan shaped loose tube structure of claim 2, wherein the excess fiber length of the loose tube is controlled to 0.4-0.6 ‰; the diameter of the loose tube is controlled at 2.8mm/24 core.
4. The layer stranded fan shaped loose tube structure as claimed in claim 1, wherein the twisting pitch of the loose tube is controlled to 120-130mm and the twisting period is 6.
5. The layer stranded segmental loose tube structure of claim 1, wherein the plastic-coated armor layer is a metallic armor layer having a layer of water-blocking intumescent cable paste indirectly applied to a surface thereof.
6. The layer-twisted fan-shaped loose tube structure as claimed in claim 1, wherein two ultra-low shrinkage binding yarns are wrapped around the surface of the loose tube in the forward and reverse directions.
7. An optical cable employing the stranded, fan-shaped loose tube structure of any one of claims 1 to 6, wherein the loose tube contains a plurality of communication optical fibers.
8. The optical cable adopting the structure of the layer-stranding fan-shaped loose tube according to claim 7, wherein the communication optical fiber is a loose fiber which is distributed in a sine shape in the PBT loose tube; or the communication optical fiber is wrapped by yarns with different colors to form a differentiated optical fiber bundle; or, the surface is sprayed with a numbered optical fiber ribbon matrix.
9. The optical cable adopting the structure of the layer-stranding fan-shaped loose tube according to claim 8, wherein the loose tube is filled with hydrogen-absorbing water-blocking paste.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221759209.2U CN217543484U (en) | 2022-07-08 | 2022-07-08 | Layer-stranded fan-shaped loose sleeve structure and optical cable |
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| CN202221759209.2U CN217543484U (en) | 2022-07-08 | 2022-07-08 | Layer-stranded fan-shaped loose sleeve structure and optical cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116107050A (en) * | 2023-02-22 | 2023-05-12 | 江苏巨量光电科技有限公司 | Special-shaped multitube optical fiber composite overhead ground wire and manufacturing method |
| CN117111246A (en) * | 2023-10-25 | 2023-11-24 | 江苏永鼎股份有限公司 | Reinforced direct-buried optical cable |
-
2022
- 2022-07-08 CN CN202221759209.2U patent/CN217543484U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116107050A (en) * | 2023-02-22 | 2023-05-12 | 江苏巨量光电科技有限公司 | Special-shaped multitube optical fiber composite overhead ground wire and manufacturing method |
| CN116107050B (en) * | 2023-02-22 | 2024-03-08 | 江苏巨量光电科技有限公司 | Special-shaped multitube optical fiber composite overhead ground wire and manufacturing method |
| CN117111246A (en) * | 2023-10-25 | 2023-11-24 | 江苏永鼎股份有限公司 | Reinforced direct-buried optical cable |
| CN117111246B (en) * | 2023-10-25 | 2023-12-29 | 江苏永鼎股份有限公司 | Reinforced direct-buried optical cable |
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