CN113359257B - Pressure-resistant optical cable - Google Patents
Pressure-resistant optical cable Download PDFInfo
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- CN113359257B CN113359257B CN202110728441.3A CN202110728441A CN113359257B CN 113359257 B CN113359257 B CN 113359257B CN 202110728441 A CN202110728441 A CN 202110728441A CN 113359257 B CN113359257 B CN 113359257B
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- optical cable
- force
- sheath layer
- crush
- core wire
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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
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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
- G02B6/4479—Manufacturing methods of optical cables
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention belongs to the field of communication cables, and particularly relates to a compression-resistant optical cable. It includes: the inner core wire and the sheath layer are sleeved outside the inner core wire; the outer surface of the inner core wire and the inner surface of the sheath layer are not contacted with each other and are separated from each other to form an annular cavity; the optical cable is characterized in that a plurality of separated force guiding framework pieces with J-like cross sections are evenly embedded in the sheath layer in the circumferential direction around the axis of the optical cable, each force guiding framework piece is composed of a block and a force guiding section, each block is in a semi-arc shape and embedded in the sheath layer, one end of each force guiding framework piece extends into the annular cavity from the inner surface of the sheath layer, the force guiding section is attached to the outer surface of the inner core wire and the inner surface of the sheath layer in the annular cavity, and one end of each force guiding framework piece is connected with the corresponding block. The compression-resistant optical cable has good compression resistance; through structural improvement, the force guiding form and direction in the optical cable are changed, and the optical fiber line in the optical cable is effectively prevented from being subjected to strong radial force.
Description
Technical Field
The invention belongs to the field of communication cables, and particularly relates to a compression-resistant optical cable.
Background
Fiber optic cables are manufactured to meet optical, mechanical, or environmental performance specifications and utilize one or more optical fibers disposed in a covering jacket as the transmission medium and may be used individually or in groups as telecommunication cable assemblies.
At present, the pressure resistance is a very important performance for the optical cable, and is generally regarded as the most important performance index besides the transmission performance of the optical cable. However, most optical cables do not have very excellent pressure resistance, and are easily damaged and destroyed when being subjected to 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 aerial 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, inwards acted on the optic fibre line, caused the optical cable damage.
Disclosure of Invention
In order to solve the problems that the existing optical cable generally has poor mechanical property, although the compression resistance of the optical cable can be effectively improved by adopting a layer-stranding structure in the existing improvement method, the actual optical cable is still easy to conduct force along the radial direction of the optical cable after being stressed, so that the optical cable is damaged and the like. The invention provides a compression-resistant optical cable.
The invention aims to:
Firstly, the compression resistance of the whole optical cable is improved;
and secondly, the change of the force guiding form and direction is realized through structural improvement, and the radial force guiding of the optical cable is hindered.
In order to achieve the purpose, the invention adopts the following technical scheme.
A crush resistant optical cable comprising:
the inner core wire and the sheath layer are sleeved outside the inner core wire;
the outer surface of the inner core wire and the inner surface of the sheath layer are not contacted with each other and are separated from each other to form an annular cavity;
the optical cable is characterized in that a plurality of separated force guiding framework pieces with J-shaped cross sections are evenly embedded in the sheath layer in the circumferential direction around the axis of the optical cable, each force guiding framework piece is composed of a block and a force guiding section, each block is in a semi-arc shape and embedded in the sheath layer, one end of each force guiding section extends into the annular cavity from the inner surface of the sheath layer, the force guiding section is attached to the outer surface of the inner core wire in the annular cavity and the inner surface of the sheath layer, and one end of each force guiding section is connected with the corresponding block.
As a preference, the first and second liquid crystal compositions are,
the fan-shaped angle of the force guiding framework pieces on the radial section of the optical cable is alpha, the number of the force guiding framework pieces is x, and the alpha is 360/x +/-5 degrees.
As a preference, the first and second liquid crystal compositions are,
and a rubber layer is arranged on the outer surface of the inner core wire.
As a preference, the first and second liquid crystal compositions are,
the rubber used by the rubber layer is damping rubber.
As a preference, the first and second liquid crystal compositions are,
the sheath layer is also provided with an arc-shaped force guide piece protruding outwards;
the arc-shaped force guide pieces are uniformly arranged between the blocks of the force guide framework pieces along the circumferential direction of the optical cable, and the number of the arc-shaped force guide pieces is equal to that of the force guide framework pieces.
As a preference, the first and second liquid crystal compositions are,
the arc-shaped force guide piece and the force guide framework piece are both made of elastic materials strengthened by glass beads.
As a preference, the first and second liquid crystal compositions are,
the elastic material is prepared from the raw materials of glass beads, polyurethane and vermiculite powder.
As a preference, the first and second liquid crystal compositions are,
the vermiculite powder accounts for 5-15 wt% of the total mass of the polyurethane and the vermiculite powder.
As a preference, the first and second liquid crystal compositions are,
the glass beads are hollow borosilicate glass beads, the particle size of the hollow borosilicate glass beads is 220-350 mu m, and the wall thickness is 5-20 mu m.
As a preference, the first and second liquid crystal compositions are,
the elastic material is prepared by the following method:
adding vermiculite powder into polyurethane, mixing and granulating, then loosely packing and mixing the obtained particles and glass beads, and carrying out secondary mixing to obtain the glass bead reinforced elastic material.
The invention has the beneficial effects that:
1) the optical cable can be ensured to have good pressure resistance;
2) through structural improvement, the force guiding form and direction in the optical cable are changed, and the optical fiber line in the optical cable is effectively prevented from being subjected to strong radial force;
3) The anti-distortion performance of the optical cable can be improved to a certain extent.
Description of the drawings:
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a force analysis diagram of the present invention;
FIG. 3 is another force analysis diagram of the present invention;
in the figure: 100 inner core wires, 101 optical fiber wires, 102 bundle tubes, 103 heat insulation layers, 104 rubber layers, 200 sheathing layers, 201 anti-aging layers, 300 force guiding framework pieces, 301 blocks, 302 force guiding sections, 400 arc force guiding pieces and 500 annular cavities.
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
A crush-resistant optical cable as shown in fig. 1, comprising:
an inner core wire 100 arranged from inside to outside and a sheath layer 200 sleeved outside the inner core wire 100;
an anti-aging layer 201 is arranged on the outer surface of the sheath layer 200;
an optical fiber line 101 is arranged in the inner core wire 100 along the axial direction of the optical cable, and the optical fiber line 101 is a single mode optical fiber or a multimode optical fiber or an optical fiber bundle;
The optical fiber line 101 is sleeved with a bundle tube 102, the bundle tube 102 is externally coated with a heat insulation layer 103, and the heat insulation layer 103 is externally coated with a rubber layer 104;
the outer surface of the inner core wire 100 and the inner surface of the sheath layer 200 are not contacted with each other, and the two are separated from each other, forming an annular cavity 500;
a plurality of separated force guiding framework pieces 300 with J-like cross sections are uniformly embedded in the sheath layer 200 in the circumferential direction around the axis of the optical cable, each force guiding framework piece 300 is composed of a block 301 and a force guiding section 302, the block 301 is in a semi-circular arc shape on the radial cross section of the optical cable and is embedded in the sheath layer 200, one end of each force guiding section 302 extends into the annular cavity 500 from the inner surface of the sheath layer 200, the force guiding section 302 is attached to the outer surface of the inner core wire 100 and the inner surface of the sheath layer 200 in the annular cavity 500, and one end of each force guiding section is connected with the block 301;
the force-guiding framework piece 300 is made of an elastic material, the fan-shaped angle of the force-guiding framework piece on the radial section of the optical cable is alpha, the number of the force-guiding framework pieces 300 is x, and the angle alpha is 360/x +/-5 degrees;
after the fan-shaped angle of the force-guiding framework piece 300 on the radial section of the optical cable is set,
in this embodiment, the number of the force-guiding frame members 300 is 3, and the fan-shaped angle of the force-guiding frame members 300 on the radial cross section of the optical cable is 115 °.
With the above structure, as shown in fig. 2:
when the optical cable is acted by an external force F1 in the direction of the blocks 301 of the force-guiding skeleton pieces 300, the blocks 301 of the force-guiding skeleton pieces 300 can be compressed and compacted in the radial direction of the optical cable, and in the process, because the force-guiding sections 302 are in the annular cavity 500, the force-guiding skeleton pieces 300 are separated from each other, and a movable gap exists in the actual annular cavity 500, so that the force-guiding sections 302 can move in the circumferential direction of the optical cable under the constraint of the annular cavity 500, therefore, the movement of the force-guiding sections 302 can be pushed when the blocks 301 deform, so that the external force F1 can be actually transmitted in the a direction of the blocks 301 and in the b direction of the force-guiding sections 302, the force transmission in the radial direction of the optical cable is directly reduced, and the buffering external force F1 is realized by displacement, and further a good pressure-resistant protection effect is generated on the internal core wire 100 of the optical cable;
simultaneously, the optical cable of this structure does not set up the reinforcement structure of stereoplasm, can improve the compliance of optical cable greatly, can effectively solve high proportion, difficult the just inconvenient transportation scheduling problem of buckling that conventional resistance to compression structure optical cable exists like layer-stranding cable such as GYTA and GYTS.
Further, in the above-mentioned case,
the rubber used for the rubber layer 104 at the outermost layer of the internal core wire 100 is damping rubber;
Because the structure of the force guide frame 300 of the invention realizes compression resistance buffering in a displacement mode, the rubber layer 104 has good wear resistance and is not easy to wear, and further after damping rubber is prepared into the rubber layer 104, the force guide section 302 of the force guide frame 300 can be subjected to the damping action of the rubber layer 104 in the displacement process, so that the friction force between the force guide section 302 and the rubber layer 104 is increased, and the external force action can be further buffered and counteracted in a friction mode, thereby better realizing the compression resistance and buffering action.
In a further aspect of the present invention,
the sheath layer 200 is also provided with an arc-shaped force guide member 400 protruding outwards;
the arc-shaped force guide members 400 are uniformly arranged among the blocks 301 of the force guide frame member 300 along the circumferential direction of the optical cable, and the arrangement number of the arc-shaped force guide members is equal to that of the force guide frame members 300;
the arc-shaped force guide 400 is made of the same elastic material as the force guide framework 300;
the elastic material is an elastic material reinforced by glass beads, and the preparation raw materials comprise the glass beads, polyurethane and vermiculite powder;
the vermiculite powder accounts for 5-15 wt% of the total mass of the polyurethane and the vermiculite powder, the vermiculite powder accounts for 10 wt% of the total mass of the polyurethane and the vermiculite powder in the embodiment, particles with the particle size of 1-3 mm are obtained by mixing and granulating at 95 ℃ in the prior art, the particles obtained by mixing are loosely mixed with glass beads, and the loose volume ratio of the glass beads to the particles is 5-8: 100, uniformly mixing the two materials, and then carrying out secondary mixing, wherein the mixing temperature is controlled to be 68 ℃, and the fluidity of polyurethane needs to be controlled during the secondary mixing, so that the mixing temperature is strictly controlled to be 67-70 ℃, and the elastic material mixed with the glass bead reinforced particles is obtained after mixing;
The selected glass beads are hollow borosilicate glass beads, the particle size of the hollow borosilicate glass beads is 220-350 microns, the wall thickness is 5-20 microns, the particle size of the glass beads selected in the embodiment is 280 microns, and the wall thickness is 15 microns.
Compared with the existing polyurethane elastic material, the glass bead reinforced elastic material prepared in the mode has more excellent elastic modulus and compression-resistant buffering performance, the compression resistance of the optical cable can be improved by about 14-18% compared with the existing polyurethane elastic material, and meanwhile, the roundness of the optical cable can be effectively kept after multidirectional deformation is generated by matching with the structure of the optical cable.
In addition, in the process, the hollow borosilicate glass beads must be mixed and added after the vermiculite powder and the polyurethane are mixed and granulated, and are directly added in the first mixing and granulating process, so that the preparation of the elastic material formed once can cause poor component uniformity of the vermiculite powder and the polyurethane. Tests show that when the elastic material prepared by one-time mixing is used for the optical cable, the compression resistance of the optical cable can be improved by about-3-7%.
After the arc-shaped force guide piece 400 is arranged, the compression resistance of the optical cable can be further improved;
as shown in fig. 3, when the optical cable is subjected to an external force F2 in the direction of the force-guiding section 302 of the force-guiding skeleton member 300, the optical cable may actually directly act on the arc-shaped force-guiding member 400 to form an F3 acting force, the arc-shaped force-guiding member 400 is affected by the acting force F3, and both ends of the arc-shaped force-guiding member 400 may tilt outward along the circumferential direction of the optical cable along the c direction, in this process, both ends of the force-guiding section 302 of the corresponding force-guiding skeleton member 300 may also be driven to tilt along the c direction, and meanwhile, the end of the arc-shaped force-guiding skeleton member 400 close to the block 301 of the force-guiding skeleton member 300 may drive the block 301 to be embedded into the sheath layer 200 to be turned and deformed along the d direction, and the block 301 and the force-guiding section 302 of the force-guiding skeleton member 300 form e-direction and F-direction guiding forces, so that the external force is buffered and offset is reduced, and the actual radial force of the inner core wire 100 is reduced, thereby achieving a good compression-resistant effect.
In the technical scheme of the invention, if the force-guiding framework pieces 300 are mutually abutted, the compression-resisting effect is obviously reduced, the force-guiding framework pieces do not have good compression-resisting capability, and the flexibility of the optical cable is obviously influenced.
In addition, the optical cable of the present invention is also excellent in the twist resistance. The optical cable having the structure shown in fig. 1 can drive the inner core wire 100 to twist after rotating clockwise by 22.6 °, and can drive the inner core wire 100 to twist after rotating counterclockwise by 17.2 °. Therefore, the optical cable disclosed by the invention has good anti-twisting performance besides the flexible characteristic and good pressure resistance.
Claims (10)
1. A crush-resistant optical cable, comprising:
the inner core wire and the sheath layer are sleeved outside the inner core wire;
the outer surface of the inner core wire and the inner surface of the sheath layer are not contacted with each other and are separated from each other to form an annular cavity;
the optical cable is characterized in that a plurality of separated force guiding framework pieces with J-shaped cross sections are evenly embedded in the sheath layer in the circumferential direction around the axis of the optical cable, each force guiding framework piece is composed of a block and a force guiding section, each block is in a semi-arc shape and embedded in the sheath layer, one end of each force guiding section extends into the annular cavity from the inner surface of the sheath layer, the force guiding section is attached to the outer surface of the inner core wire in the annular cavity and the inner surface of the sheath layer, and one end of each force guiding section is connected with the corresponding block.
2. The crush-resistant optical cable according to claim 1,
the fan-shaped angle of the force guiding framework pieces on the radial section of the optical cable is alpha, the number of the force guiding framework pieces is x, and the alpha is 360/x +/-5 degrees.
3. The crush-resistant optical cable according to claim 1,
and a rubber layer is arranged on the outer surface of the inner core wire.
4. The crush-resistant optical cable according to claim 3,
the rubber used by the rubber layer is damping rubber.
5. The crush-resistant optical cable according to claim 1,
the sheath layer is also internally provided with an arc-shaped force guide piece which protrudes outwards;
the arc-shaped force guide pieces are uniformly arranged between the blocks of the force guide framework pieces along the circumferential direction of the optical cable, and the number of the arc-shaped force guide pieces is equal to that of the force guide framework pieces.
6. The crush-resistant optical cable according to claim 5,
the arc-shaped force guide piece and the force guide framework piece are both made of elastic materials strengthened by glass beads.
7. The crush-resistant optical cable according to claim 6,
the elastic material is prepared from the raw materials of glass beads, polyurethane and vermiculite powder.
8. The crush-resistant optical cable according to claim 7,
the vermiculite powder accounts for 5-15 wt% of the total mass of the polyurethane and the vermiculite powder.
9. The crush-resistant optical cable according to claim 7,
the glass beads are hollow borosilicate glass beads, the particle size of the hollow borosilicate glass beads is 220-350 mu m, and the wall thickness is 5-20 mu m.
10. The crush-resistant optical cable according to claim 7,
the elastic material is prepared by the following method:
Adding vermiculite powder into polyurethane, mixing and granulating, then loosely mixing the obtained granules and glass beads, and carrying out secondary mixing to obtain the glass bead reinforced elastic material.
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| CN202110728441.3A CN113359257B (en) | 2021-06-29 | 2021-06-29 | Pressure-resistant optical cable |
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| CN202110728441.3A CN113359257B (en) | 2021-06-29 | 2021-06-29 | Pressure-resistant optical cable |
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| CN113359257A CN113359257A (en) | 2021-09-07 |
| CN113359257B true CN113359257B (en) | 2022-05-24 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113985543A (en) * | 2021-09-28 | 2022-01-28 | 杭州富通通信技术股份有限公司 | Optical cable with prestressed structure |
| CN114236717B (en) * | 2021-11-03 | 2023-08-08 | 深圳新澳科电缆有限公司 | Pressure-resistant optical cable |
| CN114325974A (en) * | 2021-12-02 | 2022-04-12 | 杭州富通通信技术股份有限公司 | Compression-resistant damping optical cable |
| CN114967016B (en) * | 2022-06-29 | 2023-08-04 | 深圳新澳科电缆有限公司 | Anti-twisting ribbon optical cable |
| CN115267995B (en) * | 2022-09-01 | 2023-05-05 | 富通集团有限公司 | Underwater optical cable for shallow water area |
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| CN208061700U (en) * | 2018-03-01 | 2018-11-06 | 浙江英美达电缆科技有限公司 | A kind of anti-extrusion stretch-proof power cable |
| CN111223603A (en) * | 2018-11-25 | 2020-06-02 | 大连龙腾流体设备有限公司 | High temperature resistant resistance to compression cable |
| CN111897069A (en) * | 2020-08-22 | 2020-11-06 | 常熟高通智能装备有限公司 | Special-shaped compression-resistant optical cable |
| CN112037979A (en) * | 2020-08-25 | 2020-12-04 | 杭州富通通信技术股份有限公司 | 5G is with mixed cable of resistance to compression photoelectricity |
| CN112102995A (en) * | 2020-09-04 | 2020-12-18 | 杨恩德 | Force transfer type anti-bending cable |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208061700U (en) * | 2018-03-01 | 2018-11-06 | 浙江英美达电缆科技有限公司 | A kind of anti-extrusion stretch-proof power cable |
| CN111223603A (en) * | 2018-11-25 | 2020-06-02 | 大连龙腾流体设备有限公司 | High temperature resistant resistance to compression cable |
| CN111897069A (en) * | 2020-08-22 | 2020-11-06 | 常熟高通智能装备有限公司 | Special-shaped compression-resistant optical cable |
| CN112037979A (en) * | 2020-08-25 | 2020-12-04 | 杭州富通通信技术股份有限公司 | 5G is with mixed cable of resistance to compression photoelectricity |
| CN112102995A (en) * | 2020-09-04 | 2020-12-18 | 杨恩德 | Force transfer type anti-bending cable |
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