CN113671646B - Submarine optical cable - Google Patents
Submarine optical cable Download PDFInfo
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- CN113671646B CN113671646B CN202110892295.8A CN202110892295A CN113671646B CN 113671646 B CN113671646 B CN 113671646B CN 202110892295 A CN202110892295 A CN 202110892295A CN 113671646 B CN113671646 B CN 113671646B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 45
- 239000010410 layer Substances 0.000 claims abstract description 220
- 230000006378 damage Effects 0.000 claims abstract description 57
- 239000011241 protective layer Substances 0.000 claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 238000009941 weaving Methods 0.000 claims abstract description 8
- 238000005253 cladding Methods 0.000 claims description 85
- 230000009467 reduction Effects 0.000 claims description 23
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 238000002955 isolation Methods 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- 230000008439 repair process Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000002674 ointment Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000008358 core component Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims 1
- 239000013307 optical fiber Substances 0.000 description 11
- 230000001066 destructive effect Effects 0.000 description 8
- 239000013535 sea water Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 238000009825 accumulation Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 241000251730 Chondrichthyes Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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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
- G02B6/4415—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
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Communication Cables (AREA)
Abstract
The application belongs to the technical field of optical cables, and particularly relates to a submarine optical cable which comprises an outer protective layer, an intermediate protective layer, an inner protective layer and a cable core assembly. The cross section of the middle protective layer is annular, and comprises a first tearing net which is attached to the outer protective layer and a first damage layer which is attached to the inner wall of the first tearing net, wherein the first tearing net is formed by weaving steel wires, the first damage layer comprises a base layer I and grid strips I positioned on the periphery of the base layer I, and the inner wall surface of the first tearing net is embedded into the grid strips I; the intermediate sheath further includes a first steel strand sheath. In this embodiment, the first tearing net woven by the steel wires is attached to the periphery of the first breaking layer, and a reserved space is provided between the first tearing net and the base layer I of the first breaking layer, when the external force breaks the outer protecting layer and impacts the first tearing net, a part of the external force is consumed by deformation of the first tearing net, and the first breaking layer continues to consume the external force through self-destruction, so that the breaking force and the breaking area of the external force are reduced.
Description
Technical Field
The application belongs to the technical field of optical cables, and particularly relates to an undersea optical cable.
Background
The submarine cable is paved on the seabed by using the wire bundles wrapped by the insulating sheath, and the three-core submarine cable seawater can prevent the interference of external photomagnetic waves, so that the signal-to-noise ratio of the submarine cable is higher; no time delay is experienced in submarine cable communications. The submarine optical cable has a firm structure and light material, but cannot use light metal aluminum, because aluminum and seawater can electrochemically react to generate hydrogen, hydrogen molecules can be diffused into glass materials of the optical fibers, and the loss of the optical fibers is increased. Thus, the submarine cable is protected from hydrogen generation inside and from hydrogen permeation from outside into the cable. The cable often suffers the trawl fishing boat of fishing, and the ship anchor destroys, and even the shark gnaws and stings, when suffering external force, because current optical cable is with high rigidity to resist external force, when the sheath of optical cable reaches the protection limit, external force can cause great destruction on the optical cable. However, the repair of the submarine cable is extremely difficult, and besides accurately judging the fault section, a great deal of time is spent for salvaging the fault section to the position
On maintenance vessels, therefore, the adaptability to the submarine environment is extremely important for submarine cables.
Disclosure of Invention
The application aims to provide a submarine optical cable which is provided with a self-destruction type cladding, reduces the destruction area of external force by self-destruction of the self-destruction type cladding, has a certain deformation recovery capability and has
The self-repairing and waterproof performance is good, so that the adaptability of the submarine optical cable to the ocean environment is improved.
In order to achieve the above purpose, the present application provides the following technical solutions: the submarine optical cable sequentially comprises an outer protective layer, a middle protective layer, an inner protective layer and a cable core assembly from outside to inside, wherein the middle part of the cable core assembly is a central tube group, and optical fibers are arranged in the central tube group. The cross section of the middle protective layer is annular, the middle protective layer comprises a first tearing net which is attached to the outer protective layer and a first damage layer which is attached to the inner wall of the first tearing net, wherein the first tearing net is formed by weaving steel wires, the first damage layer comprises a base layer I and grid strips I which are positioned on the periphery of the base layer I, the grid strips I are crisscrossed and form grids, and the inner wall surface of the first tearing net is embedded into the grid strips I; the intermediate sheath further comprises a first steel strand sheath, the first damage
The layer wraps the first steel strand protection layer.
In the above technical solution, the first tearing net woven by steel wires is attached to the outer periphery of the first breaking layer, and because the outer periphery of the first breaking layer has the grid strips I, a reserved space is provided between the first tearing net and the base layer I of the first breaking layer, when the external force breaks the outer protective layer and impacts the first tearing net, the first tearing net deforms in the stress area, and under the pulling action of the grid strips I, a part of external force is consumed by the deformation of the first tearing net, and the first breaking layer is continued
External force is consumed by self-destruction, so that the destructive power and the destructive area of the external force are reduced.
As a preferred embodiment of the intermediate sheath, the intermediate sheath further comprises a second tearing web and a second breaking layer, wherein
The second tearing net is formed by weaving steel wires, the outer wall of the second tearing net is attached to the first steel strand protection layer, and the inner wall of the second tearing net is attached to the second damage layer; by a means of
The second damage layer comprises a base layer II and grid strips II arranged on the periphery of the base layer II, wherein the grid strips II are crisscrossed and form grids, and the inner wall of the second tearing net is embedded into the grid strips II; the middle protective layer further comprises a second steel stranded wire layer, the outer side of the second steel stranded wire layer is attached to the second damage layer, and the inner side of the second steel stranded wire layer is attached to the inner protective layer. For the continuous damage process of the same external force, when the first self-destruction protection layer formed by the first tearing net and the first damage layer fails to prevent, the second self-destruction protection layer formed by the second tearing net and the second damage layer continuously resists the external force through self-destruction, and the external force is more difficult to damage the second tearing net and the second damage layer due to the obstruction of the outer protection layer, the first tearing net and the first damage layer; for repeated destructive behavior at the same position, when the first self-destruction protection layer formed by the first tearing net and the first destructive layer fails, external force directly attacks the second self-destruction protection layer through the failure part of the first self-destruction protection layer, and at the moment, the second self-destruction protection layer can directly resist the external force or protect the optical cable in a self-destruction way, so that the second tearing net and the second destructive layer are directly damaged
The arrangement of the layers can enable the middle protective layer to have double protection capability, and the service life of the optical cable is prolonged.
As a further preferable scheme of the intermediate protective layer, a self-repairing agent package is filled in the grid on the surface of the first damage layer, and when the external force damages the outer protective layer and causes the self-repairing agent package to crack, the self-repairing agent package releases the self-repairing agent inside and the self-repairing agent repairs the crack of the outer protective layer. Because of the corrosion of seawater and the activity of microorganisms, the cracks on the surface of the optical cable can be gradually expanded, and when the optical cable is damaged, the first self-destruction protective layer repairs the cracks by releasing the self-repairing agent, thereby realizing the self-repairing of the optical cable, and for small damage, the self-repairing can prevent the cracks from expanding in daily accumulation and monthly accumulation,
for large damage, the self-repair can temporarily repair the optical cable, and time is striven for maintenance.
For the middle protection layer with the second tearing net, the grid on the surface of the second damage layer is preferably filled with a water-blocking powder bag, when the first damage layer is continuously damaged after the external force damages the outer protection layer, the water-blocking powder bag absorbs the water penetrating into the optical cable through the rupture seams, thereby preventing seawater from entering the optical cable, avoiding the seawater from overlooking the inner structure of the optical cable, and
it is possible to prevent the transmission of the influence signal.
As the preferable scheme of the cable core component, the cable core component comprises an isolation layer which is attached to the inner wall of the inner protective layer and a noise reduction layer which is wrapped by the isolation layer; the noise reduction layer is internally provided with a plurality of deformation cavities which are uniformly distributed around the center of the optical cable, and the deformation cavities are filled with water-blocking ointment. When the optical cable is attacked by external force, the noise reduction layer deforms under the action of the deformation cavity, so that part of external force can be consumed, the damage degree of the external force to the outer protective layer, the middle protective layer and the inner protective layer is reduced, and the optical fiber can be protected from being influenced. The water-blocking ointment filled in the deformation cavity can eliminate the shape
The air in the variable cavity can be used as a waterproof layer to protect the optical fiber.
As a preferred scheme of the noise reduction layer in the submarine optical cable, the noise reduction layer sequentially comprises an outer cladding, a middle cladding and an inner cladding from outside to inside, wherein the cross section profile of the outer cladding is provided with a round outer edge and a regular polygon inner edge; the middle cladding layer and the inner cladding layer are regular polygons, the outer edge of the middle cladding layer is opposite to the middle part of the inner plane wall surface of the outer cladding layer, the outer edge of the inner cladding layer is opposite to the middle part of the inner plane wall surface of the middle cladding layer, the outer cladding layer, the middle cladding layer and the inner cladding layer are sequentially and fixedly connected, the deformation cavity is formed between the outer cladding layer, the middle cladding layer and the inner cladding layer respectively, and the cross section of the deformation cavity is triangular. According to the outer cladding, middle cladding and inner
The shape characteristics and connection mode of the cladding, two adjacent side structures of the middle cladding support one side structure of the outer cladding,
two adjacent side structures of the inner cladding support one side structure of the middle cladding to realize a two-layer triangular support structure,
this not only ensures the supporting strength of the noise reduction layer, but also makes it have good restoration performance.
As a further preferable mode of the noise reduction layer, the noise reduction layer further comprises a core cladding independently arranged inside the inner cladding, the periphery of the core cladding is provided with a plurality of contact strips, and adjacent contact strips are not contacted; each contact strip is opposite to one inner flat wall surface of the inner cladding and contacts the middle part of the inner flat wall surface, and the central tube group is arranged at the middle part of the core cladding. When the inner cladding presses against the core cladding, the contact strip deforms, which can further dissipate the effects of external forces,
thereby ensuring that the internal optical fibers are not damaged.
As a preferred embodiment of the central tube group, the central tube group comprises an outer-layer outer-clad tube and an inner-layer copper tube, wherein the outer-clad tube is made of a nonmetallic material and has deformation performance, and can provide omnibearing and uniform support for the copper tube from outside
Force increases the bending performance of the copper tube.
As the preferable scheme of the isolation layer, the isolation layer has a three-layer structure, and is sequentially provided with a third tearing net, an inner liner and a feed layer from outside to inside, wherein the third tearing net is formed by weaving steel wires, and the inner liner is made of insulating materials; the inner wall of the feed layer is provided with a plurality of embedded strips, correspondingly, the periphery of the noise reduction layer is provided with embedded grooves, and the embedded strips are embedded into the embedded grooves. The third tearing net is used as the outermost layer structure of the isolation layer, so that the inner lining layer and the feed layer can be protected, the compressive strength of the isolation layer can be increased, and the embedded strips on the inner wall of the feed layer are embedded into the embedded grooves on the periphery of the noise reduction layer
In the process, the isolation layer and the noise reduction layer can be ensured to keep a stable position relationship.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic cross-sectional view of a submarine cable according to the present application;
FIG. 2 is a schematic view of a partial girdling structure of a submarine optical cable according to the present application;
FIG. 3 is a schematic perspective view of the girdling state shown in FIG. 2;
FIG. 4 is a schematic view of the first damaged layer in FIG. 1;
FIG. 5 is a schematic view of the structure of the first tear web of FIG. 1;
FIG. 6 is a schematic view of the second damaged layer of FIG. 1;
FIG. 7 is a schematic view of a girdling of the structure within the inner sheath of the structure of FIG. 2;
fig. 8 is a schematic plan view of the cable core assembly of fig. 1.
In the figure, an outer sheath 1, a first tearing net 2, a first breaking layer 3, a first steel strand sheath 4, a second tearing net 5, a second breaking layer 6, a second steel strand layer 7, an inner sheath 8, an isolation layer 9, a noise reduction layer 10, a central tube group 11 and an optical fiber
12. Base layer I31, grid bar I32, self-repairing agent bag 33, base layer II61, grid bar II62, water-blocking powder bag 63,
Third tearing net 91, inner liner 92, feeding layer 93, outer cladding 101, middle cladding 102, inner cladding 103, core cladding
Layer 104, deformation cavity 105, water-blocking ointment 106, outer coating tube 111, copper tube 112, jogged strip 931, jogged groove 1011,
Contact strip 1041.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the drawings and examples, thereby how the present application can be applied
The technical means solves the technical problems and realizes the technical effect, and the realization process can be fully understood and implemented according to the technical means.
Fig. 1-8 illustrate an embodiment of the present application for a submarine cable. As shown in FIG. 1, the submarine optical cable sequentially comprises an outer sheath 1, an intermediate sheath, an inner sheath 8 and a cable core assembly from outside to inside, wherein the middle part of the cable core assembly is a central tube group 11, optical fibers 12 are arranged in the central tube group 11, the cross section of the intermediate sheath is annular, and the submarine optical cable has a first self-path
The protective layer is destroyed and the second self-destruction protective layer is destroyed.
Specifically, as shown in fig. 2 and 3, the first self-destruction protection layer includes a first tearing net 2 attached to the outer protection layer 1 and a first destruction layer 3 attached to the inner wall of the first tearing net 2, where the first tearing net 2 is woven by steel wires, the first destruction layer 3 includes a base layer I31 and grid strips I32 located at the periphery of the base layer I31, the grid strips I32 are crisscrossed and form grids, and a self-repairing agent package 33 (as shown in fig. 4) is disposed in each grid, and the inner wall surface of the first tearing net 2 is embedded in the grid strips I32. The second self-destruction protective layer comprises a second tearing net 5 and a second destruction layer 6, wherein the second tearing net 5 is formed by weaving steel wires, the outer wall of the second tearing net is attached to the first steel strand protective layer 4, and the inner wall of the second tearing net is attached to the second destruction layer 6; the second breaking layer 6 comprises a base layer II61 and grid strips II62 arranged on the periphery of the base layer II61, the grid strips II62 are crisscrossed and form a grid, a water-blocking powder bag 63 (shown in fig. 6) is arranged in the grid, and the inner wall of the second tearing net 5 is embedded into the grid strips II 62; the intermediate protection layer further comprises a second steel stranded wire layer 7, the outer side of the second steel stranded wire layer 7 is attached to the second damage layer 6, and the inner side of the second steel stranded wire layer is attached to the inner protection layer 8. For the continuous damage process of the same external force, when the first self-destruction protection layer formed by the first tearing net 2 and the first damage layer 3 fails to prevent, the second self-destruction protection layer formed by the second tearing net 5 and the second damage layer 6 continuously resists the external force through self destruction, and the external force is more difficult to damage the second tearing net 5 and the second damage layer 6 due to the obstruction of the outer protection layer 1, the first tearing net 2 and the first damage layer 3; for repeated destructive behavior of the same position, when the first self-destruction protection layer formed by the first tearing net 2 and the first destructive layer 3 fails to prevent, external force can directly attack the second self-destruction protection layer through the failure place of the first self-destruction protection layer, and at the moment, the second self-destruction protection layer can directly resist external force or protect the optical cable in a self-destruction mode, so that the second tearing net 5 and the second destructive layer 6 can enable the middle protection layer to have double protection capability, and the service life of the optical cable is prolonged. In addition, a first steel strand protection layer 4 is arranged between the first self-destruction protection layer and the second self-destruction protection layer, and the second self-destruction protection layer is arranged
A second steel strand layer 7 is arranged between the sheath and the inner sheath 8.
In this embodiment, in the first self-destruction protection layer, the first tearing net 2 woven by steel wires is adhered to the outer periphery of the first destruction layer 3, and since the outer periphery of the first destruction layer 3 has the grating strips I32, a space is reserved between the first tearing net 2 and the base layer I31 of the first destruction layer 3, as shown in FIG. 5, when the external force F breaks the outer protection layer 1 and impacts the first destruction layer 1
When the point A on the tearing net 2 is torn, the first tearing net 2 will deform in the stress area and pull the grid strip I32
Under the action, the deformation of the first tearing net 2 can consume a part of external force, and the first damage layer 3 can continuously consume the external force through self-destruction, so that the damage force and the damage area of the external force are reduced, and after the first self-destruction protection layer fails to prevent, the second self-destruction protection layer can still protect the optical cable. And when the external force damages the outer sheath 1 and causes the self-repairing agent pack 33 to crack, the self-repairing agent pack 33 releases the self-repairing agent inside, and the self-repairing agent repairs the crack of the outer sheath 1. When the first breaking layer 3 is broken after the external force breaks the outer sheath 1, the water-blocking powder pack 63 absorbs the water penetrating into the inside of the optical cable through the breaking joint, thereby preventing seawater from entering the inside of the optical cable, which can not only prevent seawater from overlooking the inner structure of the optical cable,
and can prevent the influence on the transmission of signals.
In addition to the above structure, the cable core assembly in this embodiment includes an isolation layer 9 provided to be bonded to the inner wall of the inner sheath 8, and a noise reduction layer 10 wrapped by the isolation layer 9; specifically, as shown in fig. 7, the noise reduction layer 10 includes an outer cladding 101, a middle cladding 102, and an inner cladding 103 in this order from the outside to the inside, wherein the cross-sectional profile of the outer cladding 101 has a circular outer edge and a regular hexagonal inner edge; the middle cladding 102 and the inner cladding 103 are regular hexagons, the outer edge of the middle cladding 102 faces the middle part of the inner plane wall surface of the outer cladding 101, the outer edge of the inner cladding 103 faces the middle part of the inner plane wall surface of the middle cladding 102, the outer cladding 101, the middle cladding 102 and the inner cladding 103 are sequentially and fixedly connected, and a deformation cavity 105 with a triangular cross section is formed among the three parts. The inside sets up a plurality of deformation chamber 105, deformation chamber 105 evenly distributed around the center of optical cable to fill in the oleamen 106 that blocks water in deformation chamber 105. Based on the shape characteristics and the connection mode of the outer cladding 101, the middle cladding 102 and the inner cladding 103, two adjacent side structures of the middle cladding 102 support one side structure of the outer cladding 101, and two adjacent side structures of the inner cladding 103 support one side structure of the middle cladding 102, so that a two-layer triangular support structure is realized, which not only can ensure the support strength of the noise reduction layer 10, but also can ensure good restoration performance. When the optical cable is attacked by external force, the noise reduction layer 10 deforms under the action of the deformation cavity 105, so that part of external force can be consumed, the damage degree of the external force to the outer protective layer 1, the middle protective layer and the inner protective layer 8 is reduced, and the optical fiber can be protected from being influenced. The water-blocking ointment 106 filled in the deformation cavity 105 can eliminate the deformation cavity 105
The air in the interior can also be used as a waterproof layer to protect the optical fibers.
As shown in fig. 7, the isolation layer 9 has a three-layer structure, which is formed by braiding a third tearing net 91 with steel wires, an inner liner 92 made of an insulating material, and a feeding layer 93 sequentially from outside to inside. A plurality of fitting strips 931 are provided on the inner wall of the power feeding layer 93, and correspondingly, fitting grooves 1011 are provided on the outer periphery of the outer cladding layer 101, and the fitting strips 931 are fitted into the fitting grooves 1011. The third tearing net 91 is used as the outermost layer structure of the isolation layer 9, which not only can protect the inner lining layer 92 and the power supply layer 93, but also can increase the compressive strength of the isolation layer 9, and the embedded strips 931 on the inner wall of the power supply layer 93 are embedded into the embedded grooves 1011 on the periphery of the noise reduction layer 10, so that the isolation layer 9 and the power supply layer 93 can be ensured
The noise reduction layer 10 maintains a stable positional relationship.
In addition, a core cladding 104 is independently provided inside the inner cladding 103, and six contact strips 1041 are provided on the outer periphery of the core cladding 104, and adjacent contact strips 1041 are not in contact with each other; each contact bar 1041 is opposite to one of the inner cladding layers 103
And the inner flat wall surface is contacted with the middle part of the inner flat wall surface. The center tube group 11 is disposed in the middle of the core-cladding 104,
the outer tube 111 is made of a nonmetallic material and has deformation performance, and can provide omnibearing and uniform supporting force for the copper tube 112 from the outside, so that the bending performance of the copper tube is improved. When the inner cladding 103 presses the core cladding 104, the contact strip 1041 deforms, which can further consume the external force
Thereby ensuring that the internal optical fibers are not damaged.
Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within acceptable tolerances, those skilled in the art are able to within a certain range
The technical problems are solved within the error range, and the technical effects are basically achieved.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the statement "comprises one … …" is not to be excluded from inclusion of the element
Additional identical elements are present in the article or system.
While the foregoing description illustrates and describes the preferred embodiments of the present application, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the application,
it is intended that the application be within the scope of the appended claims.
Claims (8)
1. Submarine optical cable, it includes outer sheath, middle sheath, interior sheath and cable core subassembly from outside to inside in proper order, and wherein the middle part of cable core subassembly is the center nest of tubes, sets up optic fibre in the center nest of tubes, its characterized in that: the cross section of the middle protective layer is annular, the middle protective layer comprises a first tearing net which is attached to the outer protective layer and a first damage layer which is attached to the inner wall of the first tearing net, wherein the first tearing net is formed by weaving steel wires, the first damage layer comprises a base layer I and grid strips I which are positioned on the periphery of the base layer I, the grid strips I are crisscrossed and form grids, and the inner wall surface of the first tearing net is embedded into the grid strips I; the middle protection layer further comprises a first steel strand protection layer, and the first damage layer wraps the first steel strand protection layer; the cable core component comprises an isolation layer which is attached to the inner wall of the inner protective layer and a noise reduction layer which is wrapped by the isolation layer; the noise reduction layer is internally provided with a plurality of deformation cavities which are uniformly distributed around the center of the optical cable, and the deformation cavities are filled with water-blocking ointment.
2. The submarine optical cable according to claim 1, wherein: the middle protective layer further comprises a second tearing net and a second damage layer, wherein the second tearing net is formed by weaving steel wires, the outer wall of the second tearing net is attached to the first steel strand protective layer, and the inner wall of the second tearing net is attached to the second damage layer; the second damage layer comprises a base layer II and grid strips II arranged on the periphery of the base layer II, wherein the grid strips II are crisscrossed and form grids, and the inner wall of the second tearing net is embedded into the grid strips II; the middle protective layer further comprises a second steel stranded wire layer, the outer side of the second steel stranded wire layer is attached to the second damage layer, and the inner side of the second steel stranded wire layer is attached to the inner protective layer.
3. The submarine optical cable according to claim 2, wherein: and filling the self-repairing agent package in the grid on the surface of the first damage layer, and releasing the self-repairing agent in the self-repairing agent package when the external force damages the outer protective layer and causes the self-repairing agent package to crack, wherein the self-repairing agent repairs the crack of the outer protective layer.
4. A submarine optical cable according to claim 3, wherein: and filling a water-blocking powder bag in the grid on the surface of the second damage layer, and absorbing water penetrating into the optical cable through the fracture when the first damage layer is damaged after the external force damages the outer protection layer.
5. The submarine optical cable according to any one of claims 1 to 4, wherein: the noise reduction layer sequentially comprises an outer cladding layer, a middle cladding layer and an inner cladding layer from outside to inside, wherein the cross section outline of the outer cladding layer is provided with a round outer edge and a regular polygon inner edge; the middle cladding layer and the inner cladding layer are regular polygons, the outer edge of the middle cladding layer is opposite to the middle part of the inner plane wall surface of the outer cladding layer, the outer edge of the inner cladding layer is opposite to the middle part of the inner plane wall surface of the middle cladding layer, the outer cladding layer, the middle cladding layer and the inner cladding layer are sequentially and fixedly connected, the deformation cavity is formed between the outer cladding layer, the middle cladding layer and the inner cladding layer respectively, and the cross section of the deformation cavity is triangular.
6. The submarine optical cable according to claim 5, wherein: the noise reduction layer also comprises a core cladding which is independently arranged in the inner cladding, the periphery of the core cladding is provided with a plurality of contact strips, and the adjacent contact strips are not contacted; each contact strip is opposite to one inner flat wall surface of the inner cladding and contacts the middle part of the inner flat wall surface; the central tube group is arranged at the middle part of the core cladding.
7. The submarine cable according to claim 5, wherein; the central tube group comprises an outer wrapping tube and a copper tube, wherein the outer wrapping tube is made of a nonmetallic material and has deformation performance.
8. The submarine optical cable according to claim 5, wherein: the isolation layer has a three-layer structure, and is sequentially provided with a third tearing net, an inner liner and a feed layer from outside to inside, wherein the third tearing net is formed by weaving steel wires, and the inner liner is made of an insulating material; the inner wall of the feed layer is provided with a plurality of embedded strips, correspondingly, the periphery of the noise reduction layer is provided with embedded grooves, and the embedded strips are embedded into the embedded grooves.
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| CN114325977A (en) * | 2021-12-07 | 2022-04-12 | 富通集团（嘉善）通信技术有限公司 | Optical cable |
| CN114460700A (en) * | 2022-01-11 | 2022-05-10 | 深圳新澳科电缆有限公司 | Heterogeneous impact-resistant optical cable |
| CN116009173B (en) * | 2023-03-29 | 2023-07-14 | 江苏中天科技股份有限公司 | Optical cable |
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