CN113655581B - Large-core-number flexible optical fiber ribbon optical cable and middle sheath processing device thereof - Google Patents
Large-core-number flexible optical fiber ribbon optical cable and middle sheath processing device thereof Download PDFInfo
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- CN113655581B CN113655581B CN202111223675.9A CN202111223675A CN113655581B CN 113655581 B CN113655581 B CN 113655581B CN 202111223675 A CN202111223675 A CN 202111223675A CN 113655581 B CN113655581 B CN 113655581B
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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
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
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- 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
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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
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention discloses a large-core-number flexible optical fiber ribbon optical cable which comprises a water-blocking tape, a loose tube, an inner sheath, a middle sheath and an outer sheath which are arranged from inside to outside, wherein an optical fiber ribbon matrix is arranged inside the loose tube, and a plurality of Kevlar fiber bundles are uniformly arranged between the inner wall and the outer wall of the loose tube. The invention can solve the technical problems that the existing large-core-number optical fiber ribbon optical cable cannot realize extreme bending radius and has poor tensile property, and the technical problems that the structural integrity of the optical cable is influenced and the optical fiber is possibly damaged due to the large bending internal stress of the reinforced core in an extreme bending application environment. The invention also discloses a middle sheath processing device for the large-core-number flexible optical fiber ribbon optical cable, which comprises an inner sheath, a driving screw rod, an auxiliary screw rod, a galvanized straight steel wire and a pair of mutually meshed pressing driving wheels.
Description
Technical Field
The invention belongs to the technical field of optical communication transmission, and particularly relates to a large-core-number flexible optical fiber ribbon optical cable and a processing device for a sheath in the large-core-number flexible optical fiber ribbon optical cable.
Background
Optical fiber ribbon cables with large core count are currently widely used in large data centers.
However, the existing large-core-number optical fiber ribbon cables generally have some non-negligible defects: first, it cannot achieve extreme bend radii, while tensile properties are poor; secondly, the non-metal reinforced core used by the cable belongs to a directional reinforcing element, and the temperature sensitivity of the cable is poor when the cable is bent, so that the reinforced core has large bending internal stress in an extreme bending application environment, which can affect the structural integrity of the cable and possibly damage the optical fiber; third, the optical fiber coating material generally adopts high polymer, and the change of the crystalline phase at high temperature or low temperature can cause the change of the geometric dimension of the bending form, thereby causing the occurrence of the macrobending phenomenon of the optical fiber.
Disclosure of Invention
The invention provides a large-core-number flexible optical fiber ribbon cable and a sheath processing device thereof, aiming at solving the technical problems that the conventional large-core-number optical fiber ribbon cable cannot realize extreme bending radius and has poor tensile property, the technical problems that the structural integrity of the optical cable is influenced and the optical fiber is possibly damaged due to the large bending internal stress of a reinforced core in an extreme bending application environment, and the technical problems that the optical fiber macrobending phenomenon is caused due to the fact that the optical fiber is generally made of high polymers and the change of the crystalline phase of the optical fiber at high temperature or low temperature can cause the change of the geometric dimension of the bending form.
In order to achieve the above object, according to one aspect of the present invention, there is provided a large core number flexible optical fiber ribbon cable, including an optical fiber ribbon matrix, a loose tube, an inner sheath, and an outer sheath arranged from inside to outside, characterized by further including a middle sheath arranged between the inner sheath and the outer sheath, and a plurality of Kevlar fiber bundles uniformly arranged between an inner wall and an outer wall of the loose tube.
Preferably, the outer sheath is made of a polyethylene material.
The middle sheath is made of a galvanized steel wire spring material, and the diameter of the steel wire is 1.0-2.0 mm;
the inner sheath is made of an elastic material (e.g., rubber) and is cross-linked and cured by light irradiation.
Preferably, the large core number flexible optical fiber ribbon cable further comprises a water blocking tape disposed on the inner wall of the loose tube.
Preferably, in the radial direction of the loose tube, the fiber ribbon matrix comprises P fiber ribbons arranged in parallel, where P is a natural number between 6 and 12, and Q optical fibers (i.e., the core number is Q) are horizontally arranged in each fiber ribbon, where Q is a natural number between 6 and 18.
Preferably, the number of Kevlar tow is 3, which are evenly distributed between the inner and outer wall of the loose tube at 120 ° with respect to the loose tube.
According to another aspect of the invention, a middle sheath processing device for the large-core-number flexible optical fiber ribbon cable comprises an inner sheath, a driving screw rod, an auxiliary screw rod, a galvanized straight steel wire and a pair of pressing driving wheels meshed with each other; the large-core-number flexible optical fiber ribbon optical cable comprises a loose tube, an inner sheath, a middle sheath and an outer sheath which are arranged from inside to outside, wherein an optical fiber ribbon matrix is arranged inside the loose tube, and a plurality of Kevlar fiber bundles are uniformly arranged between the inner wall and the outer wall of the loose tube; the pressing driving wheel is used for transferring the galvanized straight steel wire to a screw groove on the driving screw rod and pressing the galvanized straight steel wire in the rotation process of the driving screw rod to prevent the galvanized straight steel wire from rotating along with the driving screw rod; the driving screw and the auxiliary screw are meshed with each other and used for fixing the galvanized straight steel wire by the driving screw and preventing the galvanized straight steel wire from sliding away along with the rotation of the driving screw; the loose tube with the inner sheath passes through the axis of the driving screw.
Preferably, the driving screw and the auxiliary screw are identical in size and are respectively connected to an external driving motor.
Preferably, the pressing driving wheel is used for continuously transmitting the galvanized straight steel wire to a screw groove on the driving screw rod during pressing;
the driving screw is driven by an external motor and drives the galvanized straight steel wire to be molded and to be transmitted forwards under the meshing action of the auxiliary screw;
the inner sheath is used for fixing the formed galvanized straight steel wire separated from the spiral groove, so that a processed middle sheath is formed.
Preferably, the pressing drive wheels, which mesh with each other, are used to press the galvanized straight steel wire tightly all the way during the formation of the finished middle sheath, preventing it from rotating with the rotation of the drive screw.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. the middle sheath in the large-core-number flexible optical fiber ribbon optical cable is the spring layer, and when the optical cable is in an extreme bending state, the middle sheath preferentially bears bending stress and changes the bending state, so that the outer sheath can be prevented from cracking;
2. the inner sheath in the large-core-number flexible optical fiber ribbon optical cable is the cross-linked rubber layer, and has a strong mechanical damping buffer effect, when the optical cable is in an extremely bent state, the polymer conformation of the cross-linked rubber of the inner sheath is changed and bending stress is stored, and the stress of the cable core and the optical fiber is small, so that the extreme bending radius of the optical cable can be realized;
3. according to the invention, a plurality of Kevlar fiber bundles are uniformly arranged between the inner wall and the outer wall of the loose tube, the temperature insensitivity of the fiber can prevent the size of the loose tube from changing at high temperature or low temperature on one hand, and on the other hand, the fiber has higher tensile modulus, so that the integral tensile strength of the loose tube can be improved, and when the loose tube is in a bending state, the size of the loose tube is not changed.
4. The middle sheath greatly optimizes the stress distribution of the large-core-number flexible optical fiber ribbon cable in a bending state, and when the large-core-number flexible optical fiber ribbon cable is stretched, the middle sheath made of the galvanized steel wire spring material can also form a certain stretching window, so that the stretching strain of the large-core-number flexible optical fiber ribbon cable is reduced;
5. the middle sheath is continuously formed at one time along with the outer sheath, so that batch processing is facilitated;
6. the Kevlar fiber bundle of the invention obviously improves the mechanical property of the loose tube.
Drawings
FIG. 1 is a cross-sectional view in radial cross-section of a large core number flexible fiber optic ribbon cable of the present invention;
fig. 2 is a perspective view of the middle sheath processing device for a large core number flexible optical fiber ribbon cable according to the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1-outer sheath, 2-middle sheath, 3-inner sheath, 4-optical fiber ribbon matrix, 5-water-blocking tape, 6-Kevlar fiber bundle, 7-loose tube, 8-inner sheath, 9-processed middle sheath, 10-driving screw, 11-auxiliary screw, 12-galvanized straight steel wire and 13-pressing driving wheel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, according to a first aspect of the present invention, there is provided a large core number flexible optical fiber ribbon cable including a water blocking tape 5, a loose tube 7, an inner jacket 3, a middle jacket 2, and an outer jacket 1 disposed from inside to outside. The optical fiber ribbon matrix 4 is arranged inside the loose tube 7, and the plurality of Kevlar fiber bundles 6 are uniformly arranged between the inner wall and the outer wall of the loose tube 7.
The outer sheath 1 is made of polyethylene material.
The middle sheath 2 is made of a galvanized steel wire spring material, and the diameter of the steel wire is 1.0-2.0 mm.
The inner sheath 3 is made of an elastic material (e.g., rubber) and is cross-linked and cured by light irradiation.
The water blocking tape 5 is disposed on the inner wall of the loose tube 7.
In the radial direction of the loose tube, the optical fiber ribbon matrix 4 includes P optical fiber ribbons arranged in parallel, where P is a natural number and has a value range of 6 to 12, and Q optical fibers are horizontally arranged in each optical fiber ribbon (i.e., the core number of the optical fiber ribbon is Q), where Q is a natural number and has a value range of 6 to 18.
In the present embodiment, the number of Kevlar tow is 3, which is uniformly distributed between the inner wall and the outer wall of the loose tube 7 at 120 ° with respect to the loose tube 7.
As shown in fig. 2, according to a second aspect of the present invention, there is provided a middle jacket processing apparatus for a large core number flexible optical fiber ribbon cable as described above, comprising an inner jacket 8, a driving screw 10, an auxiliary screw 11, a galvanized straight steel wire 12, and a pair of pressing capstan 13 engaged with each other.
The pressing driving wheel 13 is used for transferring the galvanized straight steel wire 12 to a screw groove on the driving screw 10 and for pressing the galvanized straight steel wire 12 during the rotation of the driving screw 10 to prevent the galvanized straight steel wire from rotating along with the galvanized straight steel wire.
The driving screw 10 and the auxiliary screw 11 are engaged with each other for the driving screw 10 to fix the galvanized straight steel wire 12 against slipping off with the rotation of the driving screw 10. Both are identical in size and are respectively connected to an external driving motor.
The loose tube 8 with the inner sheath passes through the axis of the driving screw 10.
In the working process, firstly, the pressing driving wheel 13 continuously transmits the galvanized straight steel wire 12 to a screw groove on the driving screw rod 10, the driving screw rod 10 is driven by an external motor and drives the galvanized straight steel wire 12 to be formed and transmit forwards under the meshing action of the auxiliary screw rod 11, the formed galvanized straight steel wire is fixed on the inner sheath 8 when being separated from the screw groove, so that a processed middle sheath 9 is formed, and in the process, the pair of pressing driving wheels 13 always tightly press the galvanized straight steel wire 12 to prevent the galvanized straight steel wire 12 from rotating along with the rotation of the driving screw rod 10.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides a flexible optical fiber ribbon optical cable of big core number, includes from interior to outer pine sleeve pipe, inner sheath, well sheath and the oversheath that sets up, its characterized in that, the optical fiber ribbon matrix sets up in the inside of pine sleeve pipe, and a plurality of Kevlar tow evenly set up between the inner wall and the outer wall of pine sleeve pipe, and in the radial direction of pine sleeve pipe, the optical fiber ribbon matrix includes P a plurality of parallel arrangement's optical fiber ribbon, and wherein P is the natural number between 6 to 12, and the level is provided with Q root optic fibre in every optical fiber ribbon, and wherein Q is the natural number between 6 to 18.
2. The large core number flexible fiber optic ribbon cable of claim 1,
the outer sheath is made of polyethylene material;
the middle sheath is made of a galvanized steel wire spring material, and the diameter of the steel wire is 1.0-2.0 mm;
the inner sheath is made of an elastic material and is cross-linked and cured by light irradiation.
3. The large core count flexible fiber optic ribbon cable of claim 1 or 2, further comprising a water blocking tape disposed on an inner wall of the loose tube.
4. A large core count flexible fiber ribbon cable according to claim 1 or 2, wherein the number of Kevlar bundles is 3, which are uniformly distributed between the inner wall and the outer wall of the loose tube at 120 ° with respect to the loose tube.
5. A middle sheath processing device for a large core number flexible optical fiber ribbon cable according to any one of claims 1 to 4, comprising an inner sheath, a driving screw, an auxiliary screw, a galvanized straight steel wire, and a pair of pressing capstan engaging with each other,
the pressing driving wheel is used for transferring the galvanized straight steel wire to a screw groove on the driving screw rod and pressing the galvanized straight steel wire in the rotation process of the driving screw rod to prevent the galvanized straight steel wire from rotating along with the driving screw rod;
the driving screw and the auxiliary screw are meshed with each other and used for fixing the galvanized straight steel wire by the driving screw and preventing the galvanized straight steel wire from sliding away along with the rotation of the driving screw;
the loose tube with the inner sheath passes through the axis of the driving screw.
6. The middle sheath processing apparatus according to claim 5, wherein the driving screw and the auxiliary screw are identical in size and are respectively connected to an external driving motor.
7. A middle sheath machining device according to claim 5 or 6, characterized in that, in operation, the galvanized straight steel wire is continuously transmitted to the screw groove on the driving screw rod by first pressing the driving wheel, the driving screw rod drives the galvanized straight steel wire to be shaped and transmitted forwards by means of driving of an external motor and under the engagement action of the auxiliary screw rod, and the shaped galvanized straight steel wire is fixed on the inner sheath when being separated from the screw groove, so that the machined middle sheath is formed.
8. A middle jacket processing device according to claim 5 or 6, wherein a pair of pressing drive wheels are always pressed tightly against the galvanized straight steel wire during the process of forming the processed middle jacket, preventing the galvanized straight steel wire from rotating along with the rotation of the drive screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111223675.9A CN113655581B (en) | 2021-10-21 | 2021-10-21 | Large-core-number flexible optical fiber ribbon optical cable and middle sheath processing device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111223675.9A CN113655581B (en) | 2021-10-21 | 2021-10-21 | Large-core-number flexible optical fiber ribbon optical cable and middle sheath processing device thereof |
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| CN113655581A CN113655581A (en) | 2021-11-16 |
| CN113655581B true CN113655581B (en) | 2022-02-18 |
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| CN202111223675.9A Active CN113655581B (en) | 2021-10-21 | 2021-10-21 | Large-core-number flexible optical fiber ribbon optical cable and middle sheath processing device thereof |
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| CN115877526B (en) * | 2022-12-20 | 2023-08-01 | 长飞光纤光缆股份有限公司 | Large-core-number ribbon cable and preparation method thereof |
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| CN110727071A (en) * | 2019-10-29 | 2020-01-24 | 江苏亨通光电股份有限公司 | All-dielectric central beam tube type rat-proof termite-proof lightning-proof optical cable and preparation process thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5857051A (en) * | 1997-04-21 | 1999-01-05 | Lucent Technologies Inc. | High density riser and plenum breakout cables for indoor and outdoor cable applications |
| EP3796060B1 (en) * | 2018-10-11 | 2022-12-28 | Fujikura Ltd. | Optical fiber cable |
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2021
- 2021-10-21 CN CN202111223675.9A patent/CN113655581B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202373361U (en) * | 2011-12-28 | 2012-08-08 | 天津市英诺韦克辐照科技有限公司 | Environment-friendly electric cable |
| CN203118600U (en) * | 2013-03-18 | 2013-08-07 | 苏州宝兴电线电缆有限公司 | Low temperature resistant wear resistant irradiation crosslinking rubber insulating polyurethane sheath flexible cable |
| CN203573673U (en) * | 2013-10-16 | 2014-04-30 | 河南华泰特种电缆有限公司 | Irradiation crosslinked rubber insulation special reel cable |
| CN206058977U (en) * | 2016-10-09 | 2017-03-29 | 安徽徽宁电器仪表集团有限公司 | Tensile type electric cable of submersible pump |
| CN108614337A (en) * | 2018-06-29 | 2018-10-02 | 浙江龙鹰光电科技有限公司 | A kind of high-flexibility two-layer equation optical cable |
| CN109448911A (en) * | 2018-10-10 | 2019-03-08 | 江苏泰祥电线电缆有限公司 | A kind of tension drum cable |
| CN110727071A (en) * | 2019-10-29 | 2020-01-24 | 江苏亨通光电股份有限公司 | All-dielectric central beam tube type rat-proof termite-proof lightning-proof optical cable and preparation process thereof |
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| CN113655581A (en) | 2021-11-16 |
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