CN114914030B - Buried optical cable - Google Patents
Buried optical cable Download PDFInfo
- Publication number
- CN114914030B CN114914030B CN202210607309.1A CN202210607309A CN114914030B CN 114914030 B CN114914030 B CN 114914030B CN 202210607309 A CN202210607309 A CN 202210607309A CN 114914030 B CN114914030 B CN 114914030B
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- Prior art keywords
- optical cable
- shaped
- power transmission
- wire
- special
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
- H01B11/10—Screens specially adapted for reducing interference from external sources
- H01B11/1008—Features relating to screening tape per se
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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
- G02B6/4432—Protective covering with fibre reinforcements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
- H01B11/10—Screens specially adapted for reducing interference from external sources
- H01B11/1091—Screens specially adapted for reducing interference from external sources with screen grounding means, e.g. drain wires
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/22—Cables including at least one electrical conductor together with optical fibres
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
- H01B3/305—Polyamides or polyesteramides
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/185—Sheaths comprising internal cavities or channels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
- H01B7/288—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using hygroscopic material or material swelling in the presence of liquid
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Communication Cables (AREA)
Abstract
The invention belongs to the field of cables, and particularly relates to a buried optical cable. It comprises the following steps: the power transmission line comprises a triangular sheath layer, a power transmission line and a signal line; the signal wire is formed by wrapping a plurality of optical fiber wires by a beam tube; the triangular sheath is internally provided with a special-shaped shielding piece made of conductive materials, the special-shaped shielding piece comprises two side ribs and a top rib, and a structure formed by the two side ribs and the top rib is herringbone on the radial section of the optical cable; the top of sheath layer is equipped with the cutting groove along the optical cable axial, the top rib of dysmorphism shield extends to in the cutting groove, is filled with the hygroscopic filler in the cutting groove. The invention ensures that the photoelectric cable has good capability of dispersing longitudinal pressure by arranging the triangular sheath layer, and has relatively excellent compressive capacity when being laid in shallow burial; through the cooperation of specific hygroscopic filler and special-shaped shielding piece, can realize electrostatic discharge fast and produce good electromagnetic shielding effect through the form of half package to reduce the thunderbolt hidden danger of optical cable.
Description
Technical Field
The invention belongs to the field of cables, and particularly relates to a buried optical cable.
Background
An optical cable is a functional cable for realizing optical signal transmission and electric power transmission at the same time, and is a common multifunctional cable with extremely strong use value. The buried optical cable is an optical cable with unique use, and particularly for a part of the shallow buried optical cable, the buried optical cable needs to have a certain compression resistance.
For shallow buried optical cables, the main damage mode is lightning damage except for man-made damage or compression damage. Because the compact degree of the internal structure of the optical cable is higher, a perfect electromagnetic shielding layer is difficult to set, so that a stronger induction electric field can be externally discharged, and the risk of lightning stroke in thunderstorm weather is greatly improved.
For this purpose, there is currently no very suitable way to protect it.
Disclosure of Invention
The invention provides a buried optical cable, which aims to solve the problems that the existing buried optical cable has a certain lightning stroke potential safety hazard, the internal structure of the optical cable is compact, and lightning stroke prevention cannot be effectively realized in a conventional mode.
The invention aims at:
1. ensuring that the optical cable has relatively excellent mechanical properties;
2. the lightning hidden trouble of the optical cable can be effectively reduced through structural improvement.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
A buried optical cable, comprising:
the power transmission line comprises a triangular sheath layer, a power transmission line and a signal line;
the signal wire is formed by wrapping a plurality of optical fiber wires by a beam tube;
the triangular sheath is internally provided with a special-shaped shielding piece made of conductive materials, the special-shaped shielding piece comprises two side ribs and a top rib, and a structure formed by the two side ribs and the top rib is herringbone on the radial section of the optical cable;
the power transmission wire is arranged below the special-shaped shielding piece, and the signal wire is arranged below the power transmission wire;
the top of sheath layer is equipped with the cutting groove along the optical cable axial, the top rib of dysmorphism shield extends to in the cutting groove, is filled with the hygroscopic filler in the cutting groove.
As a preferred alternative to this,
the optical fiber line is an optical fiber bundle or an optical fiber belt formed by single optical fiber or a plurality of optical fibers.
As a preferred alternative to this,
the hygroscopic filler is polyurethane.
As a preferred alternative to this,
the power transmission wire is a conductive copper wire and/or a copper-clad aluminum conductive wire, and the outside of the power transmission wire is sequentially clad with an insulating layer and a shielding layer.
As a preferred alternative to this,
an 8-shaped tube which is horizontally arranged is arranged below the power transmission wire, and the left end and the right end of the 8-shaped tube on the radial section of the optical cable are respectively provided with a water drop-shaped wire cavity with opposite tips;
the signal lines are symmetrically arranged at the round heads of the two water drop-shaped line cavities in pairs.
As a preferred alternative to this,
and a reinforcing piece for supporting and axially guiding is arranged between the 8-shaped pipe and the power transmission wire.
As a preferred alternative to this,
an arch-shaped cavity is arranged below the 8-shaped pipe and is arched towards the middle of the 8-shaped pipe.
As a preferred alternative to this,
the outer surface of the sheath layer is provided with a metal armor layer.
The beneficial effects of the invention are as follows:
1) The arrangement of the triangular sheath layer enables the photoelectric cable to have good capability of dispersing longitudinal pressure, so that the photoelectric cable has relatively excellent compressive capacity when buried and laid, and damage caused by external pressure is avoided;
2) Through the cooperation of specific hygroscopic filler and special-shaped shielding piece, can realize electrostatic discharge fast to produce good electromagnetic shielding effect through half package form, with the lightning hidden danger of reduction optical cable.
Description of the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the optical cable provided with the metal armor layer according to the present invention;
in the figure: 100 sheath layers, 101 cutting grooves, 102 arched cavities, 103 metal armor layers, 200 special-shaped shielding pieces, 201 side ribs, 202 top ribs, 300 hygroscopic fillers, 400 power transmission wires, 401 insulating layers, 402 shielding layers, 500 signal wires, 501 optical fiber wires, 502 beam tubes, 600 8-shaped tubes, 601 water drop-shaped wire cavities and 700 reinforcing pieces.
The specific embodiment is as follows:
the invention is described in further detail below with reference to specific examples and figures of the specification. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. In addition, the embodiments of the present invention referred to in the following description are typically only some, but not all, embodiments of the present invention. Therefore, all other embodiments, which can be made by one of ordinary skill in the art without undue burden, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
In the description of the present invention, it should be understood that the terms "thickness," "upper," "lower," "horizontal," "top," "bottom," "inner," "outer," "circumferential," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, the meaning of "a plurality" means at least two, for example, two, three, etc., unless explicitly defined otherwise, the meaning of "a number" means one or more.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The raw materials used in the examples of the present invention are all commercially available or available to those skilled in the art unless specifically stated otherwise; the methods used in the examples of the present invention are those known to those skilled in the art unless specifically stated otherwise.
Examples
A triangular buried optical cable as shown in fig. 1, comprising in particular:
triangular sheath layer 100, power transmission line 400, and signal line 500;
the signal line 500 is formed by wrapping a plurality of optical fiber lines 501 by a bundle tube 502, wherein the optical fiber lines 501 are optical fiber bundles and optical fiber belts formed by single optical fibers or a plurality of optical fibers;
the triangular sheath is internally provided with a special-shaped shielding piece 200 made of conductive materials, the special-shaped shielding piece 200 comprises two side ribs 201 and a top rib 202, the structure formed by the two side ribs 201 and the top rib 202 is in a herringbone shape on the radial section of the optical cable, and the two side ribs 201 are parallel to the two side walls of the triangular sheath layer 100 and are used for forming a supporting function;
specifically, the conductive material used for the special-shaped shield 200 in this embodiment is conductive silicone;
the top end of the sheath layer 100 is provided with a cutting groove 101 along the axial direction of the optical cable, the top rib 202 of the special-shaped shielding piece 200 extends into the cutting groove 101, the cutting groove 101 is filled with a hygroscopic filler 300, and the hygroscopic filler 300 used in the embodiment is polyurethane;
the polyurethane has good elasticity, toughness and hygroscopicity, can effectively acquire moisture from the environment in which the optical cable is arranged so as to keep a wet state, can avoid the occurrence of tip discharge of the optical cable, and has better safety;
the power transmission wire 400 is a conductive copper wire and/or a copper-clad aluminum conductive wire, the outside of which is sequentially coated with an insulating layer 401 and a shielding layer 402 and is arranged below the special-shaped shielding member 200, and the signal wire 500 is arranged below the power transmission wire 400;
in the technical scheme of the invention, the special-shaped shielding piece 200, the power transmission line 400 and the signal line 500 are arranged in sequence from top to bottom, which is particularly important for the technical scheme of the invention;
in the technical scheme of the invention, through the arrangement mode, the high-voltage power transmission line 400 can generate a larger induction electric field when being used in actual use, even though the shielding layer 402 and the insulating layer 401 which are arranged conventionally are adopted, the large induction electric field is still easy to generate, so that the induction static electricity is generated by surrounding objects;
the buried optical cable also has lightning hidden trouble, which is mainly caused by a strong induction electric field, and the risk of lightning after the optical cable is buried can be effectively reduced through the quick release of static electricity and effective electromagnetic shielding.
Further, the method comprises the steps of,
a horizontal 8-shaped tube 600,8 is arranged below the conductive wire, and two opposite-pointed water drop-shaped wire cavities 601 are respectively arranged at the left end and the right end of the horizontal 8-shaped tube 600,8 on the radial section of the optical cable;
the signal wires 500 are symmetrically arranged at the round head parts of the two water drop-shaped wire cavities 601 in pairs;
a reinforcement 700 for supporting and axially guiding is provided between the 8-shaped pipe 600 and the power transmission line 400;
through the cooperation of above-mentioned structure, except can realize original lightning protection and hit, destatic the effect, can also further improve the compressive property of optical cable, make its most effort bear by wire 400 and reinforcement 700 that has better mechanical properties after the top is pressed, and avoid signal line 500 direct atress to take place the damage.
To match the above-mentioned bearing structure, an arch-shaped cavity 102 is further provided below the 8-shaped tube 600;
the arch-shaped cavity 102 arches towards the middle of the 8-shaped pipe 600;
although the power transmission line 400 and the reinforcing member 700 are used as main stress parts with larger stress threshold after the optical cable is stressed, the optical cable is also easy to displace downwards after being stressed and drive the whole sheath layer 100 to deform;
the deformation easily causes the 8-shaped tube 600 to be extruded and the water drop-shaped wire cavity 601 to be compressed, the signal wire 500 arranged in the water drop-shaped wire cavity is stressed, and the arrangement of the arched cavity 102 can further provide a larger deformation space of the 8-shaped tube 600, so that the extrusion effect of the water drop-shaped wire cavity 601 on the signal wire 500 is reduced;
and the power transmission line 400 and the reinforcing member 700 have functions of supporting and axially shaping, so that the arrangement of the cavity at the lower part thereof does not affect the structural stability of the whole optical cable.
Further, the method comprises the steps of,
the outer surface of the sheath layer 100 can be further provided with the metal armor layer 103, the structural strength of the optical cable can be further improved by the arrangement of the metal armor layer 103, so that the optical cable has better compression resistance, and due to the unique structural characteristics, the lightning stroke risk can be greatly reduced, and induced current is avoided or inhibited from being generated in the metal armor layer 103 through electrostatic discharge.
Claims (6)
1. A buried optical cable, comprising:
the power transmission line comprises a triangular sheath layer, a power transmission line and a signal line;
the signal wire is formed by wrapping a plurality of optical fiber wires by a beam tube;
the triangular sheath is internally provided with a special-shaped shielding piece made of conductive materials, the special-shaped shielding piece comprises two side ribs and a top rib, and a structure formed by the two side ribs and the top rib is herringbone on the radial section of the optical cable;
the power transmission wire is arranged below the special-shaped shielding piece, and the signal wire is arranged below the power transmission wire;
the top end of the sheath layer is provided with a cutting groove along the axial direction of the optical cable, the top rib of the special-shaped shielding piece extends into the cutting groove, and the cutting groove is filled with a hygroscopic filler;
an 8-shaped tube which is horizontally arranged is arranged below the power transmission wire, and the left end and the right end of the 8-shaped tube on the radial section of the optical cable are respectively provided with a water drop-shaped wire cavity with opposite tips;
the signal lines are symmetrically arranged at the round heads of the two water drop-shaped line cavities in pairs;
an arch-shaped cavity is arranged below the 8-shaped pipe and is arched towards the middle of the 8-shaped pipe.
2. A buried optical cable according to claim 1, wherein,
the optical fiber line is an optical fiber bundle or an optical fiber belt formed by single optical fiber or a plurality of optical fibers.
3. A buried optical cable according to claim 1, wherein,
the hygroscopic filler is polyurethane.
4. A buried optical cable according to claim 1, wherein,
the power transmission wire is a conductive copper wire and/or a copper-clad aluminum conductive wire, and the outside of the power transmission wire is sequentially clad with an insulating layer and a shielding layer.
5. A buried optical cable according to claim 1, wherein,
and a reinforcing piece for supporting and axially guiding is arranged between the 8-shaped pipe and the power transmission wire.
6. A buried optical cable according to claim 1, wherein,
the outer surface of the sheath layer is provided with a metal armor layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210607309.1A CN114914030B (en) | 2022-05-31 | 2022-05-31 | Buried optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210607309.1A CN114914030B (en) | 2022-05-31 | 2022-05-31 | Buried optical cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114914030A CN114914030A (en) | 2022-08-16 |
| CN114914030B true CN114914030B (en) | 2023-09-15 |
Family
ID=82771213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210607309.1A Active CN114914030B (en) | 2022-05-31 | 2022-05-31 | Buried optical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114914030B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117130117B (en) * | 2023-10-25 | 2024-01-19 | 南京华信藤仓光通信有限公司 | Butterfly-shaped compression-resistant stretch-resistant communication optical cable |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060103567A (en) * | 2005-03-28 | 2006-10-04 | 엘에스전선 주식회사 | Device for transferring the steel tape for shielding the optical cable |
| CN204904905U (en) * | 2015-07-31 | 2015-12-23 | 鄂尔多斯市西北电缆有限公司 | Compound optical fiber cable of triangle -shaped trouble self feed back |
| CN111679387A (en) * | 2020-06-22 | 2020-09-18 | 杭州富通通信技术股份有限公司 | Optical cable |
| CN111708136A (en) * | 2020-06-29 | 2020-09-25 | 杭州富通通信技术股份有限公司 | Outdoor small-diameter optical cable |
| CN214099236U (en) * | 2020-10-14 | 2021-08-31 | 扬州亿海物探装备有限公司 | Compound fire prevention cable |
| CN215118449U (en) * | 2021-05-20 | 2021-12-10 | 南京富达电线电缆有限公司 | Multi-path integrated photoelectric composite cable |
| CN114325975A (en) * | 2021-12-03 | 2022-04-12 | 杭州富通通信技术股份有限公司 | Triangular optical cable |
-
2022
- 2022-05-31 CN CN202210607309.1A patent/CN114914030B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060103567A (en) * | 2005-03-28 | 2006-10-04 | 엘에스전선 주식회사 | Device for transferring the steel tape for shielding the optical cable |
| CN204904905U (en) * | 2015-07-31 | 2015-12-23 | 鄂尔多斯市西北电缆有限公司 | Compound optical fiber cable of triangle -shaped trouble self feed back |
| CN111679387A (en) * | 2020-06-22 | 2020-09-18 | 杭州富通通信技术股份有限公司 | Optical cable |
| CN111708136A (en) * | 2020-06-29 | 2020-09-25 | 杭州富通通信技术股份有限公司 | Outdoor small-diameter optical cable |
| CN214099236U (en) * | 2020-10-14 | 2021-08-31 | 扬州亿海物探装备有限公司 | Compound fire prevention cable |
| CN215118449U (en) * | 2021-05-20 | 2021-12-10 | 南京富达电线电缆有限公司 | Multi-path integrated photoelectric composite cable |
| CN114325975A (en) * | 2021-12-03 | 2022-04-12 | 杭州富通通信技术股份有限公司 | Triangular optical cable |
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| Publication number | Publication date |
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| CN114914030A (en) | 2022-08-16 |
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