CN117148525A - Underwater optical cable - Google Patents
Underwater optical cable Download PDFInfo
- Publication number
- CN117148525A CN117148525A CN202311413611.4A CN202311413611A CN117148525A CN 117148525 A CN117148525 A CN 117148525A CN 202311413611 A CN202311413611 A CN 202311413611A CN 117148525 A CN117148525 A CN 117148525A
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- Prior art keywords
- layer
- buffer tube
- optical cable
- cable
- tube
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- 230000003287 optical effect Effects 0.000 title claims abstract description 46
- 239000010410 layer Substances 0.000 claims abstract description 91
- 239000011241 protective layer Substances 0.000 claims abstract description 13
- 229920001971 elastomer Polymers 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000013307 optical fiber Substances 0.000 claims description 10
- 229920001903 high density polyethylene Polymers 0.000 claims description 9
- 239000004700 high-density polyethylene Substances 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 239000004800 polyvinyl chloride Substances 0.000 claims description 6
- BLDFSDCBQJUWFG-UHFFFAOYSA-N 2-(methylamino)-1,2-diphenylethanol Chemical compound C=1C=CC=CC=1C(NC)C(O)C1=CC=CC=C1 BLDFSDCBQJUWFG-UHFFFAOYSA-N 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 229920001179 medium density polyethylene Polymers 0.000 claims description 5
- 239000004701 medium-density polyethylene Substances 0.000 claims description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 5
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 238000004321 preservation Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 230000037303 wrinkles Effects 0.000 abstract description 3
- 230000003139 buffering effect Effects 0.000 abstract description 2
- 238000005253 cladding Methods 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229920001821 foam rubber Polymers 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- G02B6/4415—Cables for special applications
- G02B6/4427—Pressure resistant cables, e.g. undersea cables
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention relates to the technical field of optical cables, and provides an underwater optical cable, which comprises: a cable core; the outer side of the cable core is sequentially coated with a first sheath layer, a corrugated buffer tube, a round triangular framework, a second sheath layer, a protective layer, a third sheath layer, a rubber buffer layer and a water-blocking skin layer; a first buffer tube is filled in a gap formed at the triangular position of the corrugated buffer tube and the rounded triangular framework, and a second buffer tube is filled in a gap formed at the three sides of the corrugated buffer tube and the rounded triangular framework; the first buffer tube has a larger diameter than the second buffer tube. The pressure of the whole cable core cable is greatly buffered by the pressure of the fillet triangle framework, the wrinkle buffer tube, the first buffer tube and the second buffer tube under water; the protective layer can improve the mechanical property of the whole optical cable; the three-layer sheath plays a role in protecting the inner sides of the respective cladding, the rubber buffer layer is used for buffering the pressure born by the water-blocking skin layer at the outermost side, and the pressure-proof and water-proof performances of the underwater optical cable are realized through multi-level protection collocation.
Description
Technical Field
The invention relates to the technical field of optical cables, in particular to an underwater optical cable.
Background
The underwater optical cable is generally arranged at a deeper position under water, because the water pressure is large, and the flow direction of the underwater water flow is complex, after a period of use, the underwater optical cable can be cracked or even broken due to the fact that the underwater optical cable cannot bear the high-strength water pressure, so that the water enters the optical cable, the underwater optical cable is damaged, the communication transmission is affected, and huge economic loss is caused. There is a need for a pressure-resistant and water-resistant submarine optical cable that addresses the above-described problems.
Disclosure of Invention
The invention aims to provide an underwater optical cable, which solves the technical problems of pressure resistance and water resistance of the underwater optical cable in the prior art.
The embodiment of the invention provides an underwater optical cable, which comprises: an underwater optical cable comprising: a cable core; the outer side of the cable core is sequentially coated with a first sheath layer, a corrugated buffer tube, a round triangular framework, a second sheath layer, a protective layer, a third sheath layer, a rubber buffer layer and a water-blocking skin layer; a first buffer tube is filled in a gap formed at the triangular position of the corrugated buffer tube and the rounded triangular framework, and a second buffer tube is filled in a gap formed at the three sides of the corrugated buffer tube and the rounded triangular framework; the first buffer tube has a larger diameter than the second buffer tube.
Further, the cable core comprises a plurality of light units and a reinforcing member, wherein the reinforcing member is positioned at the center of the cable core, and the light units are stranded on the reinforcing member.
Further, the reinforcement comprises a steel strand and a PE cushion layer, and the PE cushion layer is coated with the steel strand.
Further, the optical unit comprises an optical fiber and a loose tube, the loose tube is sleeved outside the optical fiber, and fiber paste is filled in the loose tube.
Further, the loose tube material comprises a PBT material.
Further, the material of the protective layer comprises a steel belt, an aluminum belt, a steel-plastic composite belt or an aluminum-plastic composite belt.
Further, an elastic heat-insulating layer is arranged between the round triangular framework and the second sheath layer.
Further, a groove is formed in the outer side of the rubber buffer layer.
Further, the part except the cable core in the first sheath layer is filled with cable paste.
Further, the materials of the first sheath layer, the second sheath layer and the third sheath layer comprise any one of HDPE, MDPE, PVC, TPE, PP, EVA and polyurethane.
The embodiment of the invention has at least the following technical effects:
according to the underwater optical cable provided by the embodiment of the invention, the three layers of jackets, the corrugated buffer tube, the round triangular framework and the protective layer which are arranged between the three layers of jackets are arranged, and the rubber buffer layer and the water-blocking cortex outside the three layers of jackets, so that the round triangular framework ensures the stability of the cable core and the cable core is not deformed when external force is applied; the corrugated buffer tube in the rounded triangular framework can increase the contact surface of the buffer layer when being stressed, so that the pressure of the whole cable core caused by the underwater pressure is greatly buffered; the gaps formed at the triangular parts of the corrugated buffer tube and the round triangular framework are larger than the gaps formed at the three sides of the round triangular framework, so that the diameters of the filled buffer tubes are different, the large elastic buffer tubes are filled at the triangular parts of the framework, the small elastic buffer tubes are filled at the three sides, the stability of the optical cable at three points is ensured when the optical cable is subjected to external force, and meanwhile, the elastic tubes can relieve the pressure and avoid the damage of the framework; the protective layer can improve the mechanical property of the whole optical cable; the three-layer sheath plays a role in protecting the inner sides of the respective cladding, has better waterproof and pressure-resistant capabilities, is more suitable for laying under deep water, ensures the stability of communication and reduces the pressure of maintenance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic cross-sectional view of an underwater optical cable according to an embodiment of the present invention.
Icon: 4-a rounded triangular framework; 5-protecting layer; 6-a rubber buffer layer; 7-a water-blocking skin layer; 8-an elastic heat-insulating layer; 10-light unit; 11-a stiffener; 21-a first jacket layer; 22-a second jacket layer; 23-a third jacket layer; 30-corrugated buffer tube; 31-a first buffer tube; 32-a second buffer tube; 61-grooves; 111-steel stranded wires; 112-PE cushion layer; 101-an optical fiber; 102-loose tubes.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides an underwater optical cable, including: a cable core; the outer side of the cable core is sequentially coated with a first sheath layer 21, a corrugated buffer tube 30, a round triangular framework 4, a second sheath layer 22, a protective layer 5, a third sheath layer 23, a rubber buffer layer 6 and a water-blocking skin layer 7; the first buffer tube 31 is filled in the gap formed by the triangular parts of the corrugated buffer tube 30 and the round triangular framework 4, and the second buffer tube 32 is filled in the gap formed by the triangular parts of the corrugated buffer tube 30 and the round triangular framework 4; the first buffer tube 31 has a larger diameter than the second buffer tube 32.
In this embodiment, the cable core is protected to the outer first restrictive coating 21 of cable core, and the outer rounded triangle skeleton 4 of first restrictive coating 21 is equipped with, guarantees the stability of cable core, guarantees the cable core when receiving external force and does not warp. The rounded triangle framework 4 not only keeps good stability of the triangle, but also reduces the sharpness of three corners, and even if the triangle framework is stressed, the triangle framework is not easy to puncture the outer protection. The rounded triangular frame 4 is preferably made of high density polyethylene, which provides more reliable protection for the optical fibers while having good support capability.
The rounded triangular framework 4 is internally provided with a layer of corrugated buffer tube 30, so that the contact surface of the buffer layer can be increased when the buffer layer is stressed, and the pressure of the underwater pressure to the whole cable core is greatly buffered. The gap that the triangle department that the wrinkle buffer tube 30 and fillet triangle skeleton 4 formed is greater than the gap that the trilateral department that forms with fillet triangle skeleton 4, and consequently the buffer tube diameter of packing is different, fills big elasticity buffer tube in skeleton triangle department, fills the elasticity buffer tube that the diameter is little in trilateral department, guarantees the stability of optical cable when receiving external force, and the pressure also can be alleviated to the elasticity tube simultaneously, avoids the skeleton impaired.
The second sheath layer 22 plays a role in buffering and protecting the rounded triangular framework 4. The protective layer 5 can improve the mechanical properties of the overall cable. The third sheath layer 23, the rubber buffer layer 6 and the water-blocking skin layer 7 can enhance the waterproof and external force compression resistance of the optical cable. Through set up three-layer sheath and alternate the wrinkle buffer tube 30, fillet triangle skeleton 4, the inoxidizing coating 5 that set up between the three-layer sheath to and rubber buffer layer 6 and the cortex 7 that blocks water outside the three-layer sheath, the combined action of rigid and flexible combination, layer upon layer effect makes the optical cable reach the waterproof demand of withstand voltage.
Optionally, the cable core includes a plurality of light units 10 and a reinforcing member 11, the reinforcing member 11 is located at the center of the cable core, and the plurality of light units 10 are layered on the reinforcing member 11. In this embodiment, the strength member 11 can provide a very large tensile strength to ensure the tensile strength of the cable. As shown in fig. 1, 6 optical units are layered on the reinforcing member 11, and the number of the optical units can be increased or decreased according to the communication requirement of the optical cable.
Optionally, the stiffener 11 includes steel strands 111 and a PE shim 112, which is over-molded. In this embodiment, the tensile property of the steel strand 111 is good, and the PE pad layer 112 ensures that the steel strand 111 is twisted round with the plurality of light units 10, and no indentation occurs.
Optionally, the optical unit includes an optical fiber 101 and a loose tube 102, the loose tube 102 is sleeved outside the optical fiber 101, and the loose tube 102 is filled with fiber paste. In this embodiment, the loose tube is filled with the fiber paste, and the fiber paste is directly contacted with the optical fiber, so that silver marks, hydrogen damage and even breakage of the optical fiber due to moisture can be prevented.
Optionally, the loose tube 102 comprises a PBT material. In the embodiment, the loose tube is made of PBT, so that the intensity of the tube is high, the tube is not deformed and the tube is anti-aging.
Optionally, the material of the protective layer 5 includes a steel belt, or an aluminum belt, or a steel-plastic composite belt, or an aluminum-plastic composite belt. In this embodiment, the material used for the protective layer 5 can improve the mechanical properties of the whole optical cable. Preferably, the protective layer 5 is a steel belt with an anti-rust coating on the outer surface or a longitudinal wrapping strip with double-sided anti-rust plastic coating.
Optionally, an elastic heat-insulating layer 8 is arranged between the rounded triangular framework 4 and the second sheath layer 22. In this embodiment, the elastic heat-insulating layer 8 is provided to perform heat-insulating, impact-resistant and extrusion-resistant functions. Preferably, the elastic heat-insulating layer 8 is a high-elasticity foam rubber layer, or foam rubber is filled in a gap between the round triangular framework 4 and the second sheath layer 22, so that the elasticity of the optical cable is increased, the pressure is absorbed, the capability of the optical cable for resisting external force compression is enhanced, meanwhile, side water blocking is realized, the waterproof effect is better, and the waterproof effect is suitable for a humid environment.
Optionally, a groove 61 is provided on the outside of the rubber buffer layer 6. In this embodiment, the groove design may be interlocked with the outermost water-blocking skin layer 7, and when the outermost water-blocking skin layer 7 is subjected to a large maximum pressure, the contact surface of the outermost water-blocking skin layer 7 is increased, so as to avoid the skin layer from being directly damaged. The grooves 61 in fig. 1 are U-shaped, and it is contemplated that the grooves 61 may be rectangular, V-shaped, or any other shape that increases the contact surface of the water-blocking skin 7 when compressed.
Optionally, the portion of the first jacket layer 21 other than the cable core is filled with cable paste. In this embodiment, the cable paste protects the cable from moisture outside the loose tube, and the filling of the cable paste can increase the waterproof capability, and the first sheath layer 21 can prevent the cable paste from contacting the outer layer.
Optionally, the materials of the first sheath layer 21, the second sheath layer 22 and the third sheath layer 23 include any one of HDPE, MDPE, PVC, TPE, PP, EVA and polyurethane. In this embodiment, the materials of the first sheath layer 21, the second sheath layer 22 and the third sheath layer 23 are all materials with good waterproof performance, and are selected from HDPE, MDPE, PVC, TPE, PP, EVA and polyurethane.
In some embodiments, the first sheath layer 21 and the second sheath layer 22 are made of materials with superior water blocking performance, such as high-density polyethylene HDPE, MDPE, PVC, TPE, PP, EVA, and the third sheath layer 23 is made of polyurethane with better weather resistance and protection performance, so that the cable has enough water blocking performance and softness; in some embodiments, either the first sheath layer 21 is a water-blocking tape, the second sheath layer 22 is a material with superior water-blocking properties, such as high density polyethylene HDPE, PVC, TPE, PP, EVA, and the third sheath layer 23 is made of polyurethane with better weather resistance and protection properties.
Those of skill in the art will appreciate that the various operations, methods, steps in the flow, acts, schemes, and alternatives discussed in the present invention may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed herein may be alternated, altered, rearranged, disassembled, combined, or eliminated. Further, steps, measures, schemes in the prior art with various operations, methods, flows disclosed in the present invention may also be alternated, altered, rearranged, decomposed, combined, or deleted.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific situations by those of ordinary skill in the art.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. An underwater optical cable, comprising:
a cable core;
the outer side of the cable core is sequentially coated with a first sheath layer, a corrugated buffer tube, a round triangular framework, a second sheath layer, a protective layer, a third sheath layer, a rubber buffer layer and a water-blocking skin layer;
a first buffer tube is filled in a gap formed at the triangular position of the corrugated buffer tube and the rounded triangular framework, and a second buffer tube is filled in a gap formed at the three sides of the corrugated buffer tube and the rounded triangular framework; the first buffer tube has a larger diameter than the second buffer tube.
2. The submarine optical cable according to claim 1, wherein the cable core comprises a plurality of light units and a strength member, the strength member being located in the center of the cable core, the plurality of light units being layered on the strength member.
3. An underwater optical cable as in claim 2 wherein the strength members comprise steel strands and a PE mat, the steel strands over-molding the PE mat.
4. The submarine optical cable according to claim 2, wherein the optical unit comprises an optical fiber and a loose tube, the loose tube is sleeved outside the optical fiber, and the loose tube is filled with fiber paste.
5. The submarine optical cable according to claim 4, wherein the loose tube material comprises PBT material.
6. The submarine optical cable according to claim 1, wherein the material of the protective layer comprises steel tape, or aluminum tape, or steel-plastic composite tape, or aluminum-plastic composite tape.
7. The submarine optical cable according to claim 1, wherein an elastic heat preservation layer is arranged between the rounded triangular framework and the second sheath layer.
8. An underwater optical cable as in claim 1 wherein the rubber buffer layer is provided with grooves on the outside.
9. An underwater optical cable as in claim 1 wherein the portion of the first jacket layer other than the cable core is filled with a cable paste.
10. The submarine optical cable according to claim 1, wherein the materials of the first, second and third jacket layers comprise any one of HDPE, MDPE, PVC, TPE, PP, EVA, polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311413611.4A CN117148525B (en) | 2023-10-30 | 2023-10-30 | Underwater optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311413611.4A CN117148525B (en) | 2023-10-30 | 2023-10-30 | Underwater optical cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117148525A true CN117148525A (en) | 2023-12-01 |
| CN117148525B CN117148525B (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311413611.4A Active CN117148525B (en) | 2023-10-30 | 2023-10-30 | Underwater optical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117148525B (en) |
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| CN114460700A (en) * | 2022-01-11 | 2022-05-10 | 深圳新澳科电缆有限公司 | Heterogeneous impact-resistant optical cable |
| CN114460702A (en) * | 2022-02-18 | 2022-05-10 | 浙江富春江光电科技有限公司 | Novel asymmetric optical fiber directional bending type optical cable |
| CN217156889U (en) * | 2022-07-06 | 2022-08-09 | 江苏中天科技股份有限公司 | ADSS optical cable |
| CN115657231A (en) * | 2022-10-11 | 2023-01-31 | 国网河南省电力公司洛阳供电公司 | Nonmetal fireproof, antifreezing and rat-resistant optical cable |
| CN116203689A (en) * | 2022-12-30 | 2023-06-02 | 飞讯达（厦门）信息技术有限公司 | Outdoor single-mode optical cable |
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|---|---|
| CN117148525B (en) | 2024-03-22 |
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