CN113296207A - Pressure-resistant optical cable - Google Patents
Pressure-resistant optical cable Download PDFInfo
- Publication number
- CN113296207A CN113296207A CN202110609724.6A CN202110609724A CN113296207A CN 113296207 A CN113296207 A CN 113296207A CN 202110609724 A CN202110609724 A CN 202110609724A CN 113296207 A CN113296207 A CN 113296207A
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- Prior art keywords
- buffer layer
- layer
- compression
- optical cable
- resistant
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4427—Pressure resistant cables, e.g. undersea cables
-
- 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
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/4436—Heat resistant
Abstract
The invention belongs to the field of optical cables, and particularly relates to a compression-resistant optical cable. It includes: the inner core wire, the functional protective layer, the compression-resistant buffer layer and the sheath layer are sequentially arranged from inside to outside; the cladding of functional protective layer is at the heart yearn surface, and the compression buffer layer cladding is outside at functional protective layer, and the restrictive coating cladding is at the surface of compression buffer layer, the compression buffer layer includes outer buffer layer and interior buffer layer, the internal surface of outer buffer layer is equipped with inside bellied latch, the surface of interior buffer layer be equipped with latch tip interference fit's tooth's socket, and be equipped with the deformation groove between the adjacent tooth's socket. The invention can effectively improve the compression resistance of the optical cable; the blocking of pressure conduction is realized through structural matching; the integral specific gravity of the optical cable is kept small.
Description
Technical Field
The invention belongs to the field of optical cables, and particularly relates to a compression-resistant optical cable.
Background
Optical fiber cables are a common and widely used infrastructure for constructing communication networks for civilian, military, and commercial use. For optical cables, the pressure resistance is a very important property. Most optical cables do not have excellent pressure resistance, and are easy to damage and damage when being acted by external pressure.
At present, the mode of improving the pressure resistance of the optical cable is mostly to coat a plurality of layers of rigid or hard structural layers outside the optical fiber so as to prevent the optical fiber from being damaged due to pressure. However, the structure can cause the specific gravity of the optical cable to be greatly improved, and is not beneficial to the overhead arrangement of the optical cable. Simultaneously, this type of additional strengthening still is full compact structure, and when the optical cable received external force, external force still produced radial conduction easily, internally acted on the optic fibre line, caused the optical cable damage.
Disclosure of Invention
The invention provides a compression-resistant optical cable, aiming at solving the problems that the existing optical cable is poor in compression resistance and easy to damage due to compression, the existing compression-resistant structural optical cable mostly adopts a layer-stranding strengthening mode, the specific gravity of the optical cable can be greatly increased, and external acting force is still easy to conduct inwards and the like.
The invention aims to:
firstly, the compression resistance of the optical cable is improved;
and secondly, external force conduction can be effectively blocked.
In order to achieve the purpose, the invention adopts the following technical scheme.
A crush resistant optical cable comprising:
the inner core wire, the functional protective layer, the compression-resistant buffer layer and the sheath layer are sequentially arranged from inside to outside;
functional protective layer cladding is at interior heart yearn surface, and the cladding of resistance to compression buffer layer is outside at functional protective layer, and the restrictive coating cladding is at the surface of resistance to compression buffer layer
The resistance to compression buffer layer includes outer buffer layer and interior buffer layer, the internal surface of outer buffer layer is equipped with inside bellied latch, the surface of interior buffer layer be equipped with latch tip interference fit's tooth's socket, and be equipped with the deformation groove between the adjacent tooth's socket.
As a preference, the first and second liquid crystal compositions are,
the inner core wire comprises a central optical fiber wire, and the optical fiber wire is externally coated with a beam tube;
the optical fiber line is a single-mode optical fiber or a multi-mode optical fiber or an optical fiber bundle.
As a preference, the first and second liquid crystal compositions are,
the functional protective layer comprises a moisture-proof skin and a flame-retardant layer;
the flame-retardant layer is coated outside the beam tube, and the moisture-proof skin is tightly coated on the outer surface of the flame-retardant layer.
As a preference, the first and second liquid crystal compositions are,
one end of the latch, which is close to the inner buffer layer, is a head end, and one end of the latch, which is fixedly connected with the outer buffer layer, is a tail end, and the width of the projection of the tail end on the inner buffer layer along the circumferential direction of the optical cable is smaller than that of the head end;
and one end of the tooth groove facing to the outer buffer layer is an open end, the inner side of the tooth groove is a bottom end, and the width of the open end on the radial section is smaller than that of the bottom end.
As a preference, the first and second liquid crystal compositions are,
on the radial cross section of the optical cable, the width of the opening end of the tooth groove is less than or equal to the width of the tail end of the clamping tooth, the width of the head end of the clamping tooth and the width of the bottom end of the tooth groove.
The invention has the beneficial effects that:
1) the compression resistance of the optical cable can be effectively improved;
2) the blocking of pressure conduction is realized through structural matching;
3) ensuring that the integral specific gravity of the optical cable is small.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic view of a load cell arrangement;
FIG. 4 is a graph of test results;
in the figure: 100 sheath layers, 200 compression-resistant buffer layers, 201 outer buffer layers, 2011 latch, 2011a head end, 2011b tail end, 202 inner buffer layers, 2021 tooth grooves, 2021a opening ends, 2021b bottom ends, 2022 deformation grooves, 300 functional protection layers, 301 moisture-proof skins, 302 flame-retardant layers, 400 inner core wires, 401 optical fiber wires, 402 bundle tubes, 500 first micro force measuring sensors and 600 second micro force measuring sensors.
The specific implementation mode is as follows:
the invention is described in further detail below with reference to specific embodiments and the attached drawing figures. Those skilled in the art will be able to implement the invention based on these teachings. Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Unless otherwise specified, the raw materials used in the examples of the present invention are all commercially available or available to those skilled in the art; unless otherwise specified, the methods used in the examples of the present invention are all those known to those skilled in the art.
Examples
The pressure-resistant optical cable shown in fig. 1 specifically comprises, from inside to outside:
an inner core wire 400, a functional protective layer 300, a compression-resistant buffer layer 200 and a sheath layer 100;
the inner core wire 400 comprises a central optical fiber wire 401, a bundle tube 402 is coated outside the optical fiber wire 401 to form a complete inner core wire, and the optical fiber wire 401 is a single-mode optical fiber or a multi-mode optical fiber or an optical fiber bundle;
the functional protection layer 300 comprises a moisture-proof skin 301 and a flame-retardant layer 302, wherein the flame-retardant layer 302 is wrapped outside the bundle tube 402, and the moisture-proof skin 301 is tightly wrapped on the outer surface of the flame-retardant layer 302;
the anti-compression buffer layer 200 comprises an outer buffer layer 201 and an inner buffer layer 202, wherein the inner surface of the outer buffer layer 201 is provided with a latch 2011 protruding inwards, the outer surface of the inner buffer layer 202 is provided with a tooth groove 2021 in interference fit with the end of the latch 2011, and a deformation groove 2022 is arranged between adjacent tooth grooves 2021;
the sheath layer 100 is coated on the outer surface of the compression-resistant buffer layer 200 to protect the optical cable from abrasion, ultraviolet and the like.
Through the above structure, particularly the cooperation between the latch 2011 and the tooth groove 2021, firstly, the optical cable can form a stable fitting structure, and has relatively high structural stability, and on the other hand, the interference-fit latch 2011 and the tooth groove 2021 can hinder the radial pressure conduction of the optical cable.
As shown in particular in figure 2 of the drawings,
when the radial pressure is applied, the interference connection mode between the latch 2011 and the tooth socket 2021 can absorb a large amount of acting force through static friction, and along with the increase of pressure, the static friction force is gradually changed into sliding friction acting force, so that the effect of better buffering and absorbing external acting force can be achieved, and due to the arrangement of the deformation groove 2022, the tooth socket 2021 can be deformed along with the inward movement of the latch 2011 in the radial direction, the circumferential width of the deformation groove 2022 is gradually reduced, the circumferential width of the tooth socket 2021 is increased, so that the radial acting force is absorbed in a deformation mode and is greatly converted into circumferential acting force, in the process, the inner core wire 400 is not easily subjected to a strong radial pressure effect, and the inner core wire 400 inside the optical cable generates a very excellent protection effect.
In addition, with the above structure, when the inner buffer layer 202 of the compression-resistant buffer layer 200 is subjected to strong external force in the radial direction of the optical cable, the deformation of the inner buffer layer in the radial direction is small, and the inner core wire 400 is not easily extruded.
Further, in the above-mentioned case,
as shown in fig. 2, one end of the latch 2011 close to the inner buffer layer 202 is a head end 2011a, and one end fixedly connected to the outer buffer layer 201 is a tail end 2011b, and a projection of the tail end 2011b on the inner buffer layer 202 has a smaller width along the circumferential direction of the optical cable than the head end 2011a, that is, in a radial cross section, for a tooth groove 2021, the head end 2011a has a larger width than the tail end 2011 b;
the end of the tooth groove 2021 facing the outer buffer layer 201 is an open end 2021a, the inner side is a bottom end 2021b, the width of the open end 2021a on the radial section is smaller than that of the bottom end 2021b, and in terms of the width on the radial section, the width of the open end 2021a of the tooth groove 2021 is not more than the width of the tail end 2011b of the latch 2011 < the width of the head end 2011a of the latch 2011 < the width of the bottom end 2021b of the tooth groove 2021;
the better buffering and compression-resisting matching effect can be generated by the structure, and mainly due to the fact that under the matching of the structure, when static friction is converted into sliding friction, the effect that one force is released and the buffer layer 202 deforms to absorb external acting force in matching is achieved. Specifically, as shown in fig. 3, a first micro load cell 500 is disposed between the moisture proof skin 301 and the inner buffer layer 202, a second micro load cell 600 is disposed between the sheathing layer 100 and the outer buffer layer 201, a test analysis is performed, the optical cable is clamped along the radial direction of the optical cable, data of the first micro load cell 500 and the second micro load cell 600 are observed and recorded as curves, the curves are recorded in the same graph as shown in fig. 4, a Slope reference line is marked in fig. 4, wherein Slope lines of Slope line 1.0, Slope line 0.5 and Slope line 0.25 refer to coordinate axes y (force on the second sensor)/x (force on the first sensor) 1, Slope lines of Slope line 0.5 and Slope line 0.25, respectively, and a Relative value curve (Relative curve) in fig. 4 can be obtained by comparing with the Slope reference line, the relative stress conditions of the inner cushioning layer 202. Specifically, referring to fig. 4, as the applied force applied from the outside increases, the actual value read by the first micro load cell 500 tends to increase first and then decrease, and in the initial situation, the force applied to the inner cushioning layer 202 is about 0.5 times or slightly greater than the force applied to the outer cushioning layer 201, i.e., the first half section of the inner cushioning layer 202 substantially maintains a Slope corresponding to the Slope of the Slope reference line 0.5, and then a significant decreasing stage occurs, mainly when the leading end 2011a of the latch 2011 gradually enters the bottom end 2021b from the open end 2021a of the tooth socket 2021, the static friction is converted into the sliding friction and the interference connection gradually decreases, the actual force applied to the inner cushioning layer 202 suddenly decreases, and along with the deformation of the deformation groove 2022, the trailing end 2011b of the latch 2011 does not generate the friction force with the open end 1a of the tooth socket 2021, and then the deformation groove 2022 gradually reaches the deformation limit and gradually reaches the bottom end 2021b, the head end a of the latch 2011 completely enters the bottom end 2021 of the tooth 2021, After the clamping teeth are separated from the opening end 2021a, sliding friction is generated between the tail end 2011b of the clamping teeth 2011 and the inner wall of the opening end 2021a of the tooth groove 2021 to form a guide force, so that the stress of the inner buffer layer 202 is increased again at the moment, but the increasing trend is basically equivalent to that of the Slope reference line 0.25, and the whole structure shows that the external acting force is well blocked by the compression-resistant buffer layer 200 within a certain bearing limit range, and a very excellent compression-resistant protection effect can be realized internally.
Claims (5)
1. A crush-resistant fiber optic cable, comprising:
the inner core wire, the functional protective layer, the compression-resistant buffer layer and the sheath layer are sequentially arranged from inside to outside;
the functional protective layer is coated on the outer surface of the inner core wire, the compression-resistant buffer layer is coated outside the functional protective layer, and the sheath layer is coated on the outer surface of the compression-resistant buffer layer;
the resistance to compression buffer layer includes outer buffer layer and interior buffer layer, the internal surface of outer buffer layer is equipped with inside bellied latch, the surface of interior buffer layer be equipped with latch tip interference fit's tooth's socket, and be equipped with the deformation groove between the adjacent tooth's socket.
2. The crush-resistant optical cable according to claim 1,
the inner core wire comprises a central optical fiber wire, and the optical fiber wire is externally coated with a beam tube;
the optical fiber line is a single-mode optical fiber or a multi-mode optical fiber or an optical fiber bundle.
3. The crush-resistant optical cable according to claim 1,
the functional protective layer comprises a moisture-proof skin and a flame-retardant layer;
the flame-retardant layer is coated outside the beam tube, and the moisture-proof skin is tightly coated on the outer surface of the flame-retardant layer.
4. The crush-resistant optical cable according to claim 1,
one end of the latch, which is close to the inner buffer layer, is a head end, and one end of the latch, which is fixedly connected with the outer buffer layer, is a tail end, and the width of the projection of the tail end on the inner buffer layer along the circumferential direction of the optical cable is smaller than that of the head end;
and one end of the tooth groove facing to the outer buffer layer is an open end, the inner side of the tooth groove is a bottom end, and the width of the open end on the radial section is smaller than that of the bottom end.
5. The crush-resistant optical cable according to claim 4,
on the radial cross section of the optical cable, the width of the opening end of the tooth groove is less than or equal to the width of the tail end of the clamping tooth, the width of the head end of the clamping tooth and the width of the bottom end of the tooth groove.
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| CN202110609724.6A CN113296207B (en) | 2021-06-01 | 2021-06-01 | Pressure-resistant optical cable |
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| CN202110609724.6A CN113296207B (en) | 2021-06-01 | 2021-06-01 | Pressure-resistant optical cable |
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| CN113296207A true CN113296207A (en) | 2021-08-24 |
| CN113296207B CN113296207B (en) | 2022-11-08 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6424772B1 (en) * | 1999-11-30 | 2002-07-23 | Corning Cable Systems, Llc | Fiber optic cable product and associated fabrication method and apparatus |
| CN205484969U (en) * | 2016-03-21 | 2016-08-17 | 衡水瑞通光电科技有限公司 | Steel strand wires protective case |
| WO2018157962A1 (en) * | 2017-03-03 | 2018-09-07 | Agro Ag | Holding device for holding a shielded cable |
| CN208189271U (en) * | 2018-05-23 | 2018-12-04 | 四川金开特种电线电缆有限公司 | A kind of new terrestrial cable |
| CN110568574A (en) * | 2019-08-27 | 2019-12-13 | 苏州胜信光电科技有限公司 | Anti-pressure water-blocking type optical cable for road channel |
| CN209822341U (en) * | 2019-06-03 | 2019-12-20 | 湖北特缆集团有限公司 | Resistance to compression buffering cable |
| CN211125156U (en) * | 2019-09-30 | 2020-07-28 | 无锡市明涛电缆科技有限公司 | Composite power cable |
| CN212411618U (en) * | 2020-06-15 | 2021-01-26 | 江苏河阳线缆有限公司 | High strength resistance to compression cable |
-
2021
- 2021-06-01 CN CN202110609724.6A patent/CN113296207B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6424772B1 (en) * | 1999-11-30 | 2002-07-23 | Corning Cable Systems, Llc | Fiber optic cable product and associated fabrication method and apparatus |
| CN205484969U (en) * | 2016-03-21 | 2016-08-17 | 衡水瑞通光电科技有限公司 | Steel strand wires protective case |
| WO2018157962A1 (en) * | 2017-03-03 | 2018-09-07 | Agro Ag | Holding device for holding a shielded cable |
| CN208189271U (en) * | 2018-05-23 | 2018-12-04 | 四川金开特种电线电缆有限公司 | A kind of new terrestrial cable |
| CN209822341U (en) * | 2019-06-03 | 2019-12-20 | 湖北特缆集团有限公司 | Resistance to compression buffering cable |
| CN110568574A (en) * | 2019-08-27 | 2019-12-13 | 苏州胜信光电科技有限公司 | Anti-pressure water-blocking type optical cable for road channel |
| CN211125156U (en) * | 2019-09-30 | 2020-07-28 | 无锡市明涛电缆科技有限公司 | Composite power cable |
| CN212411618U (en) * | 2020-06-15 | 2021-01-26 | 江苏河阳线缆有限公司 | High strength resistance to compression cable |
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| CN113296207B (en) | 2022-11-08 |
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