CN215577882U - Optical fiber composite shore power cable - Google Patents
Optical fiber composite shore power cable Download PDFInfo
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- CN215577882U CN215577882U CN202121364811.1U CN202121364811U CN215577882U CN 215577882 U CN215577882 U CN 215577882U CN 202121364811 U CN202121364811 U CN 202121364811U CN 215577882 U CN215577882 U CN 215577882U
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Abstract
The utility model discloses an optical fiber composite shore power cable which comprises a cable core, a reinforcing layer and a sheath layer, wherein the reinforcing layer and the sheath layer wrap the cable core from inside to outside, and the cable core is formed by twisting 3 power lines, a ground line, a plurality of signal line groups and optical units at short pitches; the power line comprises a power line conductor and a power line insulating layer wrapped outside the power line conductor; the ground wire comprises a ground wire conductor and a thickened insulating layer wrapped outside the ground wire conductor; the signal line group comprises a signal line tensile core, a signal line conductor, a signal line insulating layer and a signal line shielding layer, wherein the center of the signal line conductor is provided with the signal line tensile core to form a signal line, and the signal line insulating layer and the signal line shielding layer wrap the signal line conductor from inside to outside; the optical unit comprises a fiber core, and a tensile fiber layer, a metal belt spiral tube and a metal braid layer which are wrapped outside the fiber core from inside to outside. The cable structure further improves the compression resistance and the tensile property of the cable.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to an optical fiber composite shore power cable.
Background
Still personnel remain on the ship after the ship is landed, and fuel oil power generation is used in the past to ensure the daily life needs of the personnel, but the fuel oil power generation can bring atmospheric environmental pollution, so a cable for connecting the ship and a wharf power supply box is used in large quantity, and the cable is commonly called as a shore power cable. The shore power cable provides clean electric energy for personnel to continue working and living on the ship when the ship only leans on the shore, so that the use cost is obviously reduced, and the problem of environmental pollution is avoided. In general, a shore power cable is wound around a reel, and after a ship comes to a shore, the cable is pulled out from the reel and is connected to a power supply box on the shore of a wharf. In order to meet the requirement of informatization, the shore power cable containing the optical fiber appears in succession, but the prior art is only to simply place the optical fiber in the cable, and does not provide a scheme for solving the reliability of the optical fiber, and in the use process that the cable is stretched and bent for many times, the optical fiber is easy to break, and the transmission performance of the optical fiber cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides an optical fiber composite shore power cable.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an optical fiber composite shore power cable comprises a cable core, a reinforcing layer and a sheath layer, wherein the reinforcing layer and the sheath layer wrap the cable core from inside to outside, the cable core is formed by twisting 3 power lines, a ground line, a plurality of signal line groups and optical units in a short pitch mode, the ratio of the twisting pitch to the twisting pitch is not more than 10, the optical units are arranged in the center of the cable core, the 3 power lines and the ground line are adjacently arranged along the circumference of the optical units, the ground line is arranged in a gap between two adjacent power lines, the power lines and the ground line have the same outer diameter to form a stable structure of four equal cores, and the plurality of signal line groups are respectively arranged in gaps between the other two adjacent power lines;
the power line comprises a power line conductor and a power line insulating layer wrapped outside the power line conductor;
the ground wire comprises a ground wire conductor and a thickened insulating layer wrapped outside the ground wire conductor;
the signal line group comprises a signal line tensile core, a signal line conductor, a signal line insulating layer and a signal line shielding layer, wherein the signal line tensile core is arranged in the center of the signal line conductor to form a signal line, and the signal line conductor is wrapped by the signal line insulating layer and the signal line shielding layer from inside to outside;
the optical unit comprises a fiber core, and a tensile fiber layer, a metal belt spiral tube and a metal braid layer which are wrapped outside the fiber core from inside to outside.
Preferably, the power line conductor and the ground line conductor are formed by twisting a plurality of copper wires or aluminum alloy wires with the monofilament diameter of not more than 0.3mm in a short pitch.
Preferably, the number of the signal wires is 4, the signal wires are formed by spirally winding a plurality of copper wires with the monofilament diameter not more than 0.2mm around the tensile core, and the distance of one circle of forward movement of the copper monofilaments around the tensile core is 2-4 times of the conductor diameter of the signal wires.
Preferably, the power line insulating layer is ethylene propylene rubber, and the thickened insulating layer is ethylene propylene rubber.
Preferably, the fiber core comprises a plurality of bare fibers, tensile fibers, silicon-based fiber paste and a loose tube, the tensile fibers are arranged outside the bare fibers, the loose tube wraps the bare fibers and the tensile fibers, and the silicon-based fiber paste is filled between the loose tube and the bare fibers and between the loose tube and the tensile fibers.
Preferably, the reinforcing layer is a high-strength fiber rope, and the sheath layer is flame-retardant thermosetting rubber.
Compared with the prior art, the utility model has the beneficial effects that: the optical fiber composite shore power cable provided by the utility model has strong compression and flattening resistance, simultaneously improves the tensile property, and prevents the power line and the ground line from extruding towards the center when the cable is subjected to tensile force, so that the excess length of the optical fiber is influenced by the extrusion of the optical unit; the cable is wear-resistant and compression-resistant, and simultaneously meets the requirements of low smoke, zero halogen and flame retardance of marine products.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a light unit structure according to the present invention;
in the figure: 1. a power line conductor; 2. a power line insulating layer; 3. a reinforcing layer; 4. a signal line tensile core layer; 5. a signal line conductor layer; 6. a signal line insulating layer; 7. a signal line shielding layer; 8. a light unit; 9. a ground conductor; 10. a sheath layer; 11. thickening the insulating layer; 81. bare fiber; 82. a tensile fiber; 83. silicon-based fiber paste; 84. loosening the sleeve; 85. a tensile fiber layer; 86. A metal band spiral tube; 97. a metal braid.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
referring to fig. 1-2, the optical fiber composite shore power cable comprises a cable core, a reinforcing layer 3 and a sheath layer 10.
The cable core comprises 3 power lines, 1 ground wire, 4 signal lines and 1 optical unit, wherein the 3 power lines, the 1 ground wire and the 4 signal lines are in a short-pitch stranding structure, and the stranding pitch-diameter ratio is not more than 10. The optical unit 8 is arranged in the center of the cable core, 3 power lines and 1 ground line are arranged adjacently along the circumference of the optical unit 8, the ground line is arranged in the gap between two adjacent power lines, the ground line is additionally provided with a thickened insulating layer to enable the outer diameter of the thickened insulating layer to be the same as that of the power lines, a four-equal-core structure is formed, and 4 signal line groups are respectively arranged in the gap between the other two adjacent power lines.
The power line comprises a power line conductor 1 and a power line insulating layer 2 wrapped outside the power line conductor 1. The ground wire comprises a ground conductor 9 and a thickened insulation layer 11 wrapped around the outside of the ground conductor 9.
The power line conductor 1 and the ground line conductor 9 are formed by twisting a plurality of copper wires or aluminum alloy wires with the monofilament diameter of not more than 0.3mm in a short pitch.
The power line insulating layer 2 is made of ethylene propylene rubber, the thickened insulating layer 11 is made of ethylene propylene rubber, and the tensile strength of the thickened insulating layer is not less than 12 MPa.
The signal wire group comprises a signal wire tensile core 4, a signal wire conductor 5, a signal wire insulating layer 6 and a signal wire shielding layer 7, wherein the signal wire tensile core 4 is arranged in the center of the signal wire conductor 5 to form a signal wire, and the signal wire insulating layer 6 and the signal wire shielding layer 7 wrap the signal wire conductor 5 from inside to outside.
The signal line has 4, and the signal line is that many copper wires spiral winding that monofilament diameter is no more than 0.2mm form around the tensile core, and the distance that copper monofilament goes forward around tensile core one week is 2-4 times of signal line conductor diameter.
The optical unit 8 includes a fiber core, and a tensile fiber layer 85, a spiral metal-tape 86, and a metal braid 97 which are wrapped outside the fiber core from inside to outside. The fiber core comprises a plurality of bare fibers 81, tensile fibers 82, silicon-based fiber paste 83 and a loose tube 84, the tensile fibers 82 are arranged outside the bare fibers 81, the loose tube 84 wraps the bare fibers and the tensile fibers, and the silicon-based fiber paste 83 is filled between the loose tube 84 and the bare fibers 81 and between the loose tube 84 and the tensile fibers 82.
The residual length of the bare fiber 81 relative to the loose tube 84 is not less than 0.3%, the residual length of the loose tube 84 relative to the metal-tape spiral tube 86 is not less than 0.5%, and the residual length of the optical unit 8 relative to the cable core is not less than 0.4%.
After the twisting is finished, high-strength fiber ropes (namely the reinforcing layer 3) are adopted for weaving and reinforcing.
The sheath material is low-smoke halogen-free flame-retardant thermosetting rubber (namely sheath layer 10), the tensile strength is not less than 15MPa, and the abrasion is less than 1.9cm3。
The utility model has the advantages that:
the power line and the ground line conductor are formed by twisting a plurality of copper wires or aluminum alloy wires with the monofilament diameter of not more than 0.3mm in a short pitch. The signal wire is formed by spirally winding a plurality of copper wires with the monofilament diameter not more than 0.2mm around the tensile core, and the distance of the copper monofilament advancing around the tensile core for one circle is 2-4 times of the diameter of the signal wire conductor. These measures ensure the bending resistance of the conductor, and particularly, the signal line conductor on the outer side is subjected to much more tension or shearing force than the central position when being bent, so that the situation that the conductor is broken is avoided.
The insulating material is ethylene propylene rubber, the strength of the insulating material is not less than 12MPa, and the compression and flattening resistance of the cable is improved; the thickness of the insulating layer is increased by the ground wire, so that the outer diameter of the insulating layer is almost the same as that of the power wire, and a stable structure of four equal cores is formed. 3 power lines, 1 ground wire and 4 signal lines adopt a short-pitch stranding structure, the stranding pitch-diameter ratio is not more than 10, and high-strength fiber ropes are adopted for weaving and reinforcing after stranding. The compression and flattening resistance of the cable is further improved, the tensile property of the cable is also improved, and the situation that the power line and the ground line are extruded to the center when the cable is under tension is avoided, so that the optical unit is extruded to influence the extra length of the optical fiber.
The optical unit is arranged at the central position of the cable, and compared with the optical unit arranged between the gaps of the power lines, the influence of external pressure on the optical unit can be reduced, and meanwhile, the influence of temperature on the optical fiber transmission performance in the optical unit during vulcanization of the sheath layer is weakened.
The silica-based fiber paste in the optical unit has proper viscosity, high temperature resistance and good thermal stability, and effectively protects bare fibers from being influenced by temperature when short-time high temperature is generated due to short circuit of a cable or instantaneous high temperature is generated due to lightning stroke, thereby ensuring the transmission performance of optical fibers. The silica-based fiber paste and the tensile fiber act together to enable the bare fiber to be in a macroscopic 'suspension' state, when the cable is bent, the bare fiber has enough buffer space without being influenced by external force, and the integrity of the optical fiber is ensured. The loose tube containing the fiber paste is made of PBT (polybutylene terephthalate), the PBT has excellent high-temperature stability and extremely low water absorption, and excellent dimensional stability can be kept in the cable manufacturing and running processes, so that the extra length of the optical fiber cannot be changed, and the reliability of the optical fiber is improved. Similarly, a plurality of strands of high-strength fibers are arranged on the periphery of the PBT loose tube, so that the PBT loose tube is in a macroscopic 'suspension' state, namely the center position of the metal band spiral tube, the minimum ratio of the inner diameter of the metal band spiral tube to the outer diameter of the PBT loose tube is 1.2/1, and the larger the number of the fibers which can be actually accommodated is, the larger the controllable residual length of the PBT loose tube is. Similarly, by controlling the pay-off tension of the optical unit, and if necessary, zero tension pay-off, the optical unit also has a certain excess length relative to the cable core. By combining the three extra lengths, the total extra length can reach 1.2 percent, and the reliability of the optical fiber is obviously improved. In addition, the bare fiber and PBT loose tube has enough buffer space in the metal belt spiral tube, which ensures that the optical fiber is not influenced when the cable is bent and pulled. The 1.2% excess ensures fiber integrity even if locally involved.
The sheath is made of low-smoke halogen-free flame-retardant thermosetting rubber, the tensile strength of the sheath is not less than 15MPa, and the abrasion of the sheath is less than 1.9cm 3. The cable is wear-resistant and compression-resistant, and simultaneously meets the requirements of low smoke, zero halogen and flame retardance of marine products.
The shore power cable containing the optical fiber has the performances of aging resistance, salt mist resistance, wear resistance, bending resistance and tensile resistance, the transmission performance of the optical fiber is reliably guaranteed, and the requirements of the current and future informatization development are met.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (6)
1. An optical fiber composite shore power cable is characterized by comprising a cable core, a reinforcing layer and a sheath layer, wherein the reinforcing layer and the sheath layer wrap the cable core from inside to outside, the cable core is formed by twisting 3 power lines, a ground line, a plurality of signal line groups and an optical unit at short pitches, the ratio of the twist pitch to the twist pitch is not more than 10, the optical unit is arranged at the center of the cable core, the 3 power lines and the ground line are adjacently arranged along the circumference of the optical unit, the ground line is arranged in a gap between two adjacent power lines, the outer diameters of the power lines and the ground line are the same to form a stable structure of four equal cores, and the plurality of signal line groups are respectively arranged in gaps between the other two adjacent power lines;
the power line comprises a power line conductor and a power line insulating layer wrapped outside the power line conductor;
the ground wire comprises a ground wire conductor and a thickened insulating layer wrapped outside the ground wire conductor;
the signal line group comprises a signal line tensile core, a signal line conductor, a signal line insulating layer and a signal line shielding layer, wherein the signal line tensile core is arranged in the center of the signal line conductor to form a signal line, and the signal line conductor is wrapped by the signal line insulating layer and the signal line shielding layer from inside to outside;
the optical unit comprises a fiber core, and a tensile fiber layer, a metal belt spiral tube and a metal braid layer which are wrapped outside the fiber core from inside to outside.
2. The optical fiber composite shore power cable according to claim 1, wherein said power conductor and ground conductor are formed by twisting a plurality of copper wires or aluminum alloy wires having a monofilament diameter of not more than 0.3mm with a short pitch.
3. The optical fiber composite shore power cable according to claim 1, wherein the number of the signal wires is 4, the signal wires are formed by spirally winding a plurality of copper wires with the monofilament diameter of not more than 0.2mm around the tensile core, and the copper monofilaments advance around the tensile core for a circle by a distance of 2-4 times the conductor diameter of the signal wires.
4. The optical fiber composite shore power cable according to claim 1, wherein the power line insulation layer is ethylene propylene rubber, and the thickened insulation layer is ethylene propylene rubber.
5. The optical fiber composite shore power cable according to claim 1, wherein the fiber core comprises a plurality of bare fibers, tensile fibers, silicon-based fiber paste, and a loose tube, the tensile fibers are disposed outside the bare fibers, the loose tube wraps the bare fibers and the tensile fibers, and the silicon-based fiber paste is filled between the loose tube and the bare fibers and the tensile fibers.
6. The optical fiber composite shore power cable according to claim 1, wherein said reinforcing layer is a high strength fiber rope and said sheath layer is a flame retardant thermoset rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121364811.1U CN215577882U (en) | 2021-06-19 | 2021-06-19 | Optical fiber composite shore power cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121364811.1U CN215577882U (en) | 2021-06-19 | 2021-06-19 | Optical fiber composite shore power cable |
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| Publication Number | Publication Date |
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| CN215577882U true CN215577882U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121364811.1U Active CN215577882U (en) | 2021-06-19 | 2021-06-19 | Optical fiber composite shore power cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114822939A (en) * | 2022-05-28 | 2022-07-29 | 齐鲁电缆有限公司 | Optical fiber composite cable for flat mining excavation equipment |
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2021
- 2021-06-19 CN CN202121364811.1U patent/CN215577882U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114822939A (en) * | 2022-05-28 | 2022-07-29 | 齐鲁电缆有限公司 | Optical fiber composite cable for flat mining excavation equipment |
| CN114822939B (en) * | 2022-05-28 | 2024-05-07 | 齐鲁电缆有限公司 | Optical fiber composite cable for flat type mining excavating equipment |
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