CN113866921A - Flexible skeleton type optical fiber ribbon cable and preparation method thereof - Google Patents
Flexible skeleton type optical fiber ribbon cable and preparation method thereof Download PDFInfo
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- CN113866921A CN113866921A CN202111192655.XA CN202111192655A CN113866921A CN 113866921 A CN113866921 A CN 113866921A CN 202111192655 A CN202111192655 A CN 202111192655A CN 113866921 A CN113866921 A CN 113866921A
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Images
Classifications
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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
-
- 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
-
- 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
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/448—Ribbon cables
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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
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
Abstract
The invention relates to a flexible skeleton type optical fiber ribbon cable and a preparation method thereof, and the flexible skeleton type optical fiber ribbon cable comprises a central reinforcing member and a multi-sector sheath coated outside the central reinforcing member, wherein the multi-sector sheath comprises a sleeve layer and a sheath layer which are sequentially sleeved outside the central reinforcing member, a plurality of separation layers which are respectively connected with the sleeve layer and the sheath layer are arranged between the sleeve layer and the sheath layer, the sleeve layer, the separation layers and the sheath layer are integrally formed, the annular space between the sleeve layer and the sheath layer is divided into a plurality of fan-shaped areas by the separation layers, and optical fiber ribbons are filled in the fan-shaped areas. The invention improves the occupation ratio of the optical fiber ribbon in the skeleton structure and is suitable for preparing the skeleton optical cable with large core number, and adopts the integrally formed multi-sector sheath to replace the layered cladding structure, so that the structure is simple, the manufacture is easy, and the water resistance is further improved.
Description
Technical Field
The invention relates to the technical field of structural design and preparation methods of optical cables, in particular to a flexible skeleton type optical fiber ribbon optical cable and a preparation method thereof.
Background
With the rapid development of optical fiber communication industry and the sharp increase of information demand, the traditional optical cable with small core number has difficulty in meeting the actual communication requirement. The skeleton type optical fiber ribbon cable is concerned about due to the advantages of high optical fiber density, convenience in construction and installation and the like. The skeleton type optical fiber ribbon optical cable is rapidly developed and applied in the high-speed development of metropolitan area networks and access networks. The framework type optical fiber ribbon cable has the characteristics of small cable diameter, light weight, good bending property, strong lateral pressure resistance and the like, but the manufacturing equipment of the framework type optical fiber ribbon cable is complex, the process links are multiple, the production technology difficulty is large, and the like, and the manufacturing enterprises are troubled all the time.
Referring to fig. 1, in a conventional skeleton-type optical fiber ribbon cable, a dry-type optical fiber ribbon is arranged in a U-shaped spiral skeleton groove or an SZ spiral skeleton groove in a matrix form, a water blocking tape is wrapped and wound on a skeleton, so that the skeleton and the water blocking tape form a closed cavity, the water blocking tape absorbs water and expands to generate a water blocking gel barrier when encountering water, the water blocking tape is longitudinally wrapped with a double-sided plastic-coated steel tape, and a polyethylene outer protective layer is extruded at the steel tape.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the problems of the traditional skeleton type optical fiber ribbon optical cable structure and the preparation process in the prior art, and provide a flexible skeleton type optical fiber ribbon optical cable and a preparation method thereof, on one hand, the occupation ratio of an optical fiber ribbon in the skeleton structure is improved, and the flexible skeleton type optical fiber ribbon optical cable is suitable for preparing a skeleton optical cable with a large core number, on the other hand, an integrally formed multi-sector sheath is adopted to replace a layered coating structure, the structure is simple, the manufacturing is easy, and the water blocking performance is further improved.
In order to solve the technical problem, the invention provides a flexible framework type optical fiber ribbon cable which comprises a central reinforcing part and a multi-sector sheath coated outside the central reinforcing part, wherein the multi-sector sheath comprises a sleeve layer and a sheath layer which are sequentially sleeved outside the central reinforcing part, a plurality of separation layers which are respectively connected with the sleeve layer and the sheath layer are arranged between the sleeve layer and the sheath layer, the sleeve layer, the separation layers and the sheath layer are integrally formed, the annular space between the sleeve layer and the sheath layer is divided into a plurality of fan-shaped areas by the separation layers, and optical fiber ribbons are filled in the fan-shaped areas.
In one embodiment of the invention, a plurality of the separation layers are uniformly distributed in the annular space in the circumferential direction, and the annular space is divided into a plurality of sectors with equal areas.
In one embodiment of the invention, a plurality of the separation layers are unidirectionally and spirally stranded in the annular space, and the formed fan-shaped intervals are also spatially and spirally distributed between the sleeve layer and the sheath layer.
In one embodiment of the invention, the optical fiber ribbons are stacked in layers within the sector, and the optical fiber ribbons are formed by splicing a plurality of loose optical fibers side by side with ribbon-by-ribbon resin.
In one embodiment of the invention, the voids between the multiple layers of the ribbons and between the ribbons and the spacer layer are filled with water blocking yarns.
In one embodiment of the present invention, the central reinforcing member is a fiberglass rod made of a non-metallic material.
In one embodiment of the invention, the multi-sector sheath is made of an extruded tracking-resistant flame-retardant polyethylene material.
In order to solve the technical problem, the invention also provides a preparation method of the flexible skeleton type optical fiber ribbon cable, which comprises the following steps:
preparing an optical fiber ribbon;
preparing a multi-sector sheath outside a central reinforcement, adopting an extrusion molding S-type stranding technology, forming a spiral sector interval by stranding and extrusion molding through the runner arrangement of a material distribution cone in the extrusion molding process in cooperation with the rotation of a sector mold driven by a machine head, and controlling the stranding pitch of the sector interval by controlling the extrusion speed and the machine head rotation speed;
when the multi-sector sheath is prepared, a plurality of groups of optical fiber ribbons and water-blocking yarns are horizontally pulled and vertically penetrated into each sector mold, the plurality of groups of optical fiber ribbons are layered and stacked and then synchronously penetrated into the sector mold, and the water-blocking yarns are filled in gaps between the optical fiber ribbons and the sector mold.
In one embodiment of the present invention, the process for preparing an optical fiber ribbon comprises: carrying out coloring process treatment on a plurality of bulk optical fibers; feeding the colored bulk optical fibers into a ribbon merging machine side by side according to a certain sequence, and bonding and splicing the bulk optical fibers into a ribbon structure through ribbon merging resin; and detecting the spliced optical fiber ribbon.
In one embodiment of the present invention, after cabling, the optical cable is subjected to a temperature resistance test, a flame retardancy test, a water permeability test, and a repeated bending test.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the flexible skeleton type optical fiber ribbon cable, the integrally formed multi-sector sheath is arranged to serve as the skeleton structure and the sheath structure of the cable, the traditional skeleton structure and a multi-layer coating structure are abandoned, on one hand, the occupation ratio of an optical fiber ribbon in the skeleton structure is improved, and the flexible skeleton type optical fiber ribbon cable is suitable for preparing a skeleton cable with a large core number;
according to the preparation method of the flexible skeleton type optical fiber ribbon cable, the multi-sector sheath is directly extruded outside the central reinforcement, an extrusion S-shaped stranding technology is adopted, the multi-sector sheath is arranged through the runner of the material distribution cone in the extrusion process and is matched with the sector mold driven by the machine head to rotate, the twisted extrusion molding forms the spiral sector area, the optical fiber ribbon is penetrated in the preparation process, the preparation process can be completed only through one process, the production and manufacturing process is simple compared with the conventional skeleton type optical fiber ribbon cable manufacturing process, and the manufacturing period and the cost are greatly reduced.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a conventional skeletal fiber ribbon cable configuration;
FIG. 2 is a schematic structural view of a flexible skeletal ribbon cable of the present invention;
fig. 3 is a flowchart of the steps of a method for making a flexible skeletal ribbon cable of the present invention.
The specification reference numbers indicate: 1. a central reinforcement; 2. a multi-sector sheath; 21. a sleeve layer; 22. a sheath layer; 23. a separation layer; 3. an optical fiber ribbon.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 2, the flexible skeletal optical fiber ribbon cable of the present invention includes a central strength member 1 and a multi-sector sheath 2 covering the central strength member 1, the multi-sector sheath 2 comprises a sleeve layer 21 and a sheath layer 22 which are sequentially sleeved outside the central reinforcing member 1, the sleeve layer 21 is extruded and coated on the outer side of the central reinforcement 1, the sleeve layer 21 is attached to the central reinforcement 1, the sheath layer 22 is concentric with the sleeve layer 21, an annular space is formed between the sleeve layer 21 and the sheath layer 22, a plurality of separation layers 23 which are respectively connected with the sleeve layer 21 and the sheath layer 22 are arranged between the sleeve layer 21 and the sheath layer 22, the sleeve layer 21, the separation layer 23 and the sheath layer 22 are integrally formed, the annular space between the sleeve layer 21 and the sheath layer 22 is divided into a plurality of fan-shaped areas by the separation layers 23, and the fan-shaped areas are filled with the optical fiber belts 3;
the multi-sector sheath 2 is simultaneously used as a skeleton structure and a sheath structure of the optical cable, the traditional skeleton structure and a multi-layer coating structure are abandoned, on one hand, the occupation ratio of the optical fiber ribbon 3 in the skeleton structure is improved, and the multi-sector sheath is suitable for preparing a skeleton optical cable with a large core number, the duty ratio of the optical fiber ribbon 3 in each sector area in the embodiment is controlled to be 60% -75%, on the aspect of the structural size, the optical cable with the same core number is smaller than the traditional skeleton optical fiber ribbon in size, the outer diameter of the skeleton optical cable is about 30mm according to the traditional 1200 core skeleton optical cable, the outer diameter of the 1152 core optical cable of the flexible skeleton optical fiber ribbon optical cable is about 20mm, and the sectional area of the optical cable is reduced by about 33% compared with the sectional area of the optical cable; on the other hand, adopt integrated into one piece's multisector sheath 2, simple structure, light in weight, great reduction manufacturing cycle and cost of transportation to reduce the number of piles of optical cable, prevent that the optical cable from permeating water between the layer, further promoted the performance that blocks water.
Specifically, it is a plurality of 23 circumference evenly distributed on separate layer are in the annular space, will annular space divides into the sector interval that a plurality of areas are equal, according to actual use scene and user demand, generally divides annular space into 4 ~ 8 sector intervals, and when separating for 4 sector intervals, the shared angle of every sector interval is 90, when separating for 8 sector intervals, the shared angle of every sector interval is 45.
Specifically, in order to satisfy the mechanical properties of optical cable, make the optical cable have certain longitudinal tensile resistance, consequently, the optical fiber ribbon 3 that sets up in the optical cable should the spiral transposition setting, guarantees optical fiber ribbon 3 like this and reserves the extra length, receives tensile condition at the optical cable, can directly not exert the effort on optical fiber ribbon 3, consequently, in order to satisfy above-mentioned characteristic, a plurality of in this embodiment separation layer 23 one-way spiral transposition is in the annular space, form the fan-shaped interval also is spatial spiral distribution between sleeve layer 21 and restrictive coating 22, and optical fiber ribbon 3 just can spiral transposition distribution like this, can reserve certain extra length, promotes optical cable mechanical properties.
Specifically, the optical fiber ribbon 3 is layered and stacked in the sector area, the optical fiber ribbon 3 is formed by splicing a plurality of scattered optical fibers side by using a ribbon resin to form the optical fiber ribbon 3 with 6-16 cores, in this embodiment, taking an 8-sector structure as an example, each single-sector 144 cores, and the optical fiber ribbon 3 may be sequentially stacked according to 6 cores, 8 cores, 10 cores, 12 cores, 16 cores, and 6 cores.
Specifically, in order to promote the longitudinal water-blocking performance between the fan-shaped sections, water-blocking yarns are filled in the gaps between the optical fiber ribbons 3 and the separation layer 23 in multiple layers, and the water-blocking yarns play a dry water-blocking effect.
Specifically, the central reinforcement 1 is a glass fiber rod made of a non-metallic material, the glass fiber rod is made of fluorine-free boron-free high-strength glass fiber yarns, the impact resistance and the fatigue resistance are higher, higher reliability, longer service life, lower cost, excellent high temperature resistance and corrosion resistance are provided for the optical cable, and the glass fiber rod is placed in the center of the cable, so that the bending performance of the optical cable can be improved, and the problem of lightning stroke caused by the fact that the traditional framework type optical cable contains a metal reinforcement can be solved.
Specifically, the multi-sector sheath 2 is made of a tracking-resistant flame-retardant polyethylene material through extrusion molding, and the tracking-resistant flame-retardant polyethylene material has excellent environmental stress cracking resistance and electrical insulation, high heat resistance, impact resistance, puncture resistance and other properties, and can meet certain flame-retardant requirements in electric power use scenes.
In summary, the flexible skeleton-type optical fiber ribbon cable in the embodiment adopts the non-metal reinforcement, the dry-type water-blocking yarn, and the tracking-resistant flame-retardant polyethylene sheath, is an all-dielectric, all-dry-type, electric corrosion-resistant, and flame-retardant optical cable, and is suitable for a high-voltage electric field environment in an electric power access network system.
Referring to fig. 3, the method for preparing a flexible skeleton type optical fiber ribbon cable of the invention comprises the following steps:
preparing an optical fiber ribbon 3;
preparing a multi-sector sheath 2 outside a central reinforcement 1, adopting an extrusion molding S-type stranding technology, arranging a runner of a material distribution cone in an extrusion molding process, matching a sector mold driven by a machine head to rotate, stranding and extruding to form a spiral sector, and controlling the stranding pitch of the sector by controlling the extrusion speed and the machine head rotation speed;
while preparing the multi-sector sheath 2, horizontally dragging and vertically penetrating a plurality of groups of optical fiber ribbons 3 and water-blocking yarns into each sector mold, layering and stacking the plurality of groups of optical fiber ribbons 3 and then synchronously penetrating into the sector mold, wherein the water-blocking yarns are filled in gaps between the optical fiber ribbons 3 and the sector mold;
the preparation method of the flexible framework type optical fiber ribbon cable only needs to directly extrude the plastic multi-sector sheath 2 outside the central reinforcement member 1, adopts the extrusion S-shaped stranding technology, strands the plastic extrusion to form the spiral sector interval, and wears to establish the optical fiber ribbon 3 while preparing the multi-sector sheath 2, the preparation process only needs one process to be completed, the manufacturing process is simple compared with the conventional framework type optical fiber ribbon cable, and the manufacturing period and the cost are greatly reduced.
Specifically, the process for preparing optical fiber ribbon 3 includes: carrying out coloring process treatment on a plurality of bulk optical fibers; the colored bulk optical fibers are sent to a ribbon merging machine side by side according to a certain sequence, the bulk optical fibers can be arranged according to the sequence of a full optical fiber chromatogram or a pilot optical fiber chromatogram according to the actual use requirement, and the bulk optical fibers are bonded and spliced into a ribbon structure through ribbon merging resin; after the optical fiber ribbon combining is finished, the spliced optical fiber ribbon 3 is detected, and the optical performance detection, the stripping detection, the flatness detection and other detection steps are included, so that the use performance of the optical fiber is not influenced.
Specifically, in the preparation process of the multi-sector sheath 2, the extrusion molding sheath has certain contractibility, and the vacuum sizing sheath forming technology is adopted, so that the duty ratio of each sector and the outer diameter of the optical cable are more stable through negative pressure pumping and vacuum sizing.
Specifically, after cabling, the optical cable needs to be subjected to temperature resistance testing, flame retardance testing, water permeability testing and repeated bending testing, and after the optical cable reaches a testing standard, packaging is performed to complete preparation.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. The utility model provides a flexible skeleton formula optical fiber ribbon cable, its characterized in that includes central reinforcement and the multisector sheath of cladding outside central reinforcement, the multisector sheath is including establishing sleeve layer and restrictive coating outside central reinforcement in proper order, be provided with a plurality of separate layers of adapter sleeve layer and restrictive coating respectively between sleeve layer and the restrictive coating, sleeve layer, separate layer, restrictive coating integrated into one piece set up, and is a plurality of the separate layer separates into a plurality of fan-shaped intervals with the annular space between sleeve layer and the restrictive coating, and is a plurality of the one-way spiral transposition of separate layer is in the annular space, form fan-shaped interval also is space spiral distribution between sleeve layer and restrictive coating the fan-shaped interval intussuseption is filled with the optical fiber area.
2. The flexible skeletal ribbon cable of claim 1, wherein: the plurality of separating layers are circumferentially and uniformly distributed in the annular space, and the annular space is divided into a plurality of fan-shaped intervals with equal areas.
3. The flexible skeletal ribbon cable of claim 1, wherein: the optical fiber ribbon is stacked in the sector area in a layered mode, and the optical fiber ribbon is formed by splicing a plurality of scattered optical fibers in parallel by adopting ribbon-combined resin.
4. The flexible skeletal ribbon cable of claim 3, wherein: and water blocking yarns are filled in gaps among the optical fiber ribbons and the separation layers.
5. The flexible skeletal ribbon cable of claim 1, wherein: the central reinforcing part is a glass fiber rod made of a non-metallic material.
6. The flexible skeletal ribbon cable of claim 1, wherein: the multi-sector sheath is made of tracking-resistant flame-retardant polyethylene materials through extrusion molding.
7. A preparation method of a flexible skeleton type optical fiber ribbon cable is characterized by comprising the following steps:
preparing an optical fiber ribbon;
preparing a multi-sector sheath outside a central reinforcement, adopting an extrusion molding S-type stranding technology, forming a spiral sector interval by stranding and extrusion molding through the runner arrangement of a material distribution cone in the extrusion molding process in cooperation with the rotation of a sector mold driven by a machine head, and controlling the stranding pitch of the sector interval by controlling the extrusion speed and the machine head rotation speed;
when the multi-sector sheath is prepared, a plurality of groups of optical fiber ribbons and water-blocking yarns are horizontally pulled and vertically penetrated into each sector mold, the plurality of groups of optical fiber ribbons are layered and stacked and then synchronously penetrated into the sector mold, and the water-blocking yarns are filled in gaps between the optical fiber ribbons and the sector mold.
8. The method for preparing a flexible skeletal ribbon cable according to claim 7, wherein: the process for preparing the optical fiber ribbon comprises the following steps: carrying out coloring process treatment on a plurality of bulk optical fibers; feeding the colored bulk optical fibers into a ribbon merging machine side by side according to a certain sequence, and bonding and splicing the bulk optical fibers into a ribbon structure through ribbon merging resin; and detecting the spliced optical fiber ribbon.
9. The method for preparing a flexible skeletal ribbon cable according to claim 7, wherein: after cabling, the optical cable needs to be subjected to temperature resistance testing, flame retardance testing, water permeability testing and repeated bending testing.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114675388A (en) * | 2022-05-27 | 2022-06-28 | 江苏亨通光电股份有限公司 | Skeleton type optical fiber ribbon cable and preparation method thereof |
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| CN2876812Y (en) * | 2006-03-09 | 2007-03-07 | 深圳市特发信息股份有限公司光缆分公司 | Unidirectional skeleton type optical fiber band optical cable |
| CN2876811Y (en) * | 2006-03-09 | 2007-03-07 | 深圳市特发信息股份有限公司光缆分公司 | Skeleton type optical fiber band optical cable |
| CN201556432U (en) * | 2009-06-24 | 2010-08-18 | 沈群华 | Skeleton-type cable |
| CN101943775A (en) * | 2009-07-03 | 2011-01-12 | 华为技术有限公司 | Cable and cable system |
| CN101673593A (en) * | 2009-10-10 | 2010-03-17 | 龚利芬 | Slotted core ribbon cable |
| CN103093887A (en) * | 2013-01-28 | 2013-05-08 | 蒋菊生 | Cross-shaped framework and cables with cross-shaped framework adopted |
| CN105513694A (en) * | 2013-01-28 | 2016-04-20 | 吴红平 | Convenient-to-construct cable |
| CN105655035A (en) * | 2013-01-28 | 2016-06-08 | 朱保生 | Convenient-to-construct and easy-to-make cable |
| WO2021093395A1 (en) * | 2019-11-13 | 2021-05-20 | 江苏亨通光电股份有限公司 | Optical cable structure and preparation method thereof |
| CN214311012U (en) * | 2020-10-26 | 2021-09-28 | 富通特种光缆(天津)有限公司 | Large core number skeleton type optical cable and manufacturing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114675388A (en) * | 2022-05-27 | 2022-06-28 | 江苏亨通光电股份有限公司 | Skeleton type optical fiber ribbon cable and preparation method thereof |
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