CN117854823A - High-reliability photovoltaic cable - Google Patents
High-reliability photovoltaic cable Download PDFInfo
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- CN117854823A CN117854823A CN202410257878.7A CN202410257878A CN117854823A CN 117854823 A CN117854823 A CN 117854823A CN 202410257878 A CN202410257878 A CN 202410257878A CN 117854823 A CN117854823 A CN 117854823A
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- 239000010410 layer Substances 0.000 claims abstract description 68
- 239000013307 optical fiber Substances 0.000 claims abstract description 26
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- 239000011810 insulating material Substances 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 4
- 229920000098 polyolefin Polymers 0.000 claims description 4
- 239000005060 rubber Substances 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims description 3
- 239000000112 cooling gas Substances 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 claims description 3
- 239000003063 flame retardant Substances 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 1
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Abstract
A high reliability photovoltaic cable comprising: the cable comprises a support frame, a cable support structure, a cable, a filling layer, an annular support layer, a protective layer, a sheath layer, a temperature measuring optical fiber and a pressure sensing optical fiber; the support frame comprises a reinforcing rib and a support arm; the annular supporting layer is arranged on the outer side of the supporting frame, the cable supporting structure is an inwardly extending vortex structure, and the cable supporting structure is arranged on the inner periphery of the annular supporting layer; the cable supporting structure is used for supporting cables; the temperature measuring optical fiber and the sensing optical fiber are arranged on the cable supporting structure; the protective layer is arranged outside the annular supporting layer; the protective layer is arranged outside the protective layer. The high-reliability photovoltaic cable can measure the temperature and pressure of the environment where the cable is located in real time, so that potential problems can be found in time, and cable faults and safety accidents can be effectively avoided.
Description
Technical Field
The invention relates to the field of cables, in particular to a high-reliability photovoltaic cable.
Background
The photovoltaic cable in the prior art is mainly used for transmitting electric energy, and in severe environments, the cable can be subjected to larger mechanical stress, such as strong wind, vibration or heavy weight compression, and the existing photovoltaic cable can be more prone to problems of breakage, breakage or conductor exposure under the conditions. In addition, the photovoltaic cable in the prior art does not have the temperature and pressure measurement function, lacks necessary information acquisition function in the aspect of real-time monitoring of the cable, and when an emergency occurs, potential problems can be possibly caused and can not be found in time, so that the probability of damage of the photovoltaic cable is increased. Therefore, under the basic function of ensuring the electric energy transmission, the performance of the photovoltaic cable against external impact, extrusion, pulling, torsion and the like is improved, the temperature and the pressure of a designated part can be detected in real time, and the photovoltaic cable is an important development direction in the future.
Disclosure of Invention
In view of the above technical problems, the present invention provides a high reliability photovoltaic cable, including: the cable comprises a support frame, a cable support structure, a cable, a filling layer, an annular support layer, a protective layer, a sheath layer, a temperature measuring optical fiber and a pressure sensing optical fiber;
the support frame comprises a reinforcing rib and a support arm; the reinforcing ribs are of cylindrical strip structures, the supporting arms are arranged on the periphery of the reinforcing ribs, and the number of the supporting arms is three and distributed along the radial direction of the reinforcing ribs at equal intervals; the annular supporting layer is arranged on the outer side of the supporting frame, the annular supporting layer and the reinforcing ribs are concentrically arranged, and the inner side of the annular supporting layer is connected with the supporting arm;
the cable supporting structures are arranged on the inner periphery of the annular supporting layer, and the number of the cable supporting structures is three and the cable supporting structures are distributed at equal intervals along the radial direction of the annular supporting layer; the annular supporting layer and the supporting arm divide the axial section of the photovoltaic cable into three closed spaces with the same size; the middle position in each enclosed space is provided with one cable supporting structure; the number of the cables is the same as that of the cable supporting structures, and the cables are respectively arranged in the corresponding cable supporting structures;
the cable supporting structure comprises an elastic supporting beam, a cable bracket, a temperature sensing part and a pressure sensing part; the elastic support beam comprises a support baffle and an inwardly extending vortex structure, the vortex structure comprises a first half-circle structure, a second half-circle structure, a third half-circle structure and a switching part which are sequentially connected, the diameter of the first half-circle structure is larger than that of the second half-circle structure, the diameter of the second half-circle structure is larger than that of the third half-circle structure, the switching part is connected with the cable support, and the cable support, the second half-circle structure and the third half-circle structure are arranged at intervals; one end of the supporting partition plate is connected with the initial part of the first half-circle structure, and the other end of the supporting partition plate is connected with the final part of the second half-circle structure, so that a closed cavity is formed inside the vortex structure; the connection part of the first half-circle structure and the second half-circle structure is provided with a raised pressure sensing part, and a first through hole for accommodating the pressure sensing optical fiber is formed in the pressure sensing part; the left side of the switching part is provided with a raised temperature sensing part, and a second through hole for accommodating the temperature measuring optical fiber is formed in the temperature sensing part; the cable support is a hollow cylinder; the connecting line of the circle center of the first through hole and the circle center of the cable bracket is perpendicular to the connecting line of the circle center of the second through hole and the circle center of the cable bracket;
the protective layer is arranged outside the annular supporting layer; the protective layer is arranged outside the protective layer.
Optionally, a semicircular protruding column is arranged at a position of the support frame corresponding to the pressure sensing part, and the minimum distance between the semicircular protruding column and the pressure sensing part is 1-5mm.
Optionally, the supporting arms and the semicircular protruding columns are distributed in an array structure along the axial direction of the reinforcing ribs.
Optionally, the elastic modulus of the supporting frame is the same as that of the annular supporting layer, the elastic modulus of the supporting frame is greater than that of the cable supporting structure, and the elastic modulus of the cable supporting structure is greater than that of the filling layer.
Optionally, the cable is a copper-aluminum alloy conductor, and a heat conduction insulating layer is filled in a gap between the cable and the cable support.
Optionally, the inner wall of the temperature sensing part is provided with a through hole communicated with the cable bracket, and when the heat conducting insulating material is poured, the insulating material flows into the temperature sensing part together, and a gap between the temperature measuring optical fiber and the temperature sensing part is filled.
Optionally, the protective layer is a steel wire braided armor layer.
Optionally, the material of the sheath layer is halogen-free low-smoke polyolefin.
Optionally, a waterproof layer is arranged between the protective layer and the sheath layer, and the waterproof layer is made of polyvinyl chloride rubber.
Optionally, a closed cavity formed inside the vortex structure in the cable supporting structure is filled with inert gas or flame-retardant liquid; when the temperature sensing part detects that the whole temperature of the photovoltaic cable is too high, the starting end and the ending end of the photovoltaic cable are opened, and cooling gas or liquid is introduced into a closed cavity formed in the vortex structure in the cable supporting structure.
Compared with the prior art, the invention has the following technical effects:
1. the photovoltaic cable has the temperature and pressure measuring function, can measure the temperature and pressure of the environment where the cable is located in real time, and can find potential problems such as overheat or overvoltage conditions in time, so that necessary measures are taken, and cable faults and safety accidents are effectively avoided.
2. The photovoltaic cable adopts the cable supporting structure to realize the isolation of the cable and the whole structure, and the supporting structure of the vortex structure effectively avoids the influence of external impact, extrusion, pulling, torsion and the like on the cable; the temperature measuring optical fiber is arranged at the stress-free part close to the cable, and the sensing optical fiber is arranged at the stress-sensitive radial stress part, so that the accuracy of test data is effectively ensured.
Drawings
Fig. 1 is a schematic diagram of a cross section of a high reliability photovoltaic cable according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a high-reliability photovoltaic cable according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cable supporting structure in a high-reliability photovoltaic cable according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a support frame in a high-reliability photovoltaic cable according to an embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1-4, an embodiment of the present invention provides a high reliability photovoltaic cable comprising: the cable comprises a support frame 1, a cable support structure 2, a cable 3, a filling layer 4, an annular support layer 5, a protective layer 6, a sheath layer 7, a temperature measuring optical fiber 8 and a sensing optical fiber 9;
the support frame 1 comprises a reinforcing rib 11 and a support arm 12; the reinforcing ribs 11 are of cylindrical strip structures, the supporting arms 12 are arranged on the periphery of the reinforcing ribs 11, and the number of the supporting arms 12 is three and distributed at equal intervals along the radial direction of the reinforcing ribs 11; the annular supporting layer 5 is arranged on the outer side of the supporting frame 1, the annular supporting layer 5 and the reinforcing ribs 11 are concentrically arranged, and the inner side of the annular supporting layer 5 is connected with the supporting arm 12;
the cable support structures 2 are arranged on the inner periphery of the annular support layer 5, and the number of the cable support structures 2 is three and the cable support structures are distributed at equal intervals along the radial direction of the annular support layer 5; the annular supporting layer 5 and the supporting arm 12 divide the axial section of the photovoltaic cable into three closed spaces with the same size; a cable support structure 2 is arranged at the middle position in each enclosed space; the number of the cables 3 is the same as that of the cable support structures 2, and the cables are respectively arranged in the corresponding cable support structures 2;
the cable support structure 2 comprises an elastic support beam 21, a cable bracket 22, a temperature sensing part 23 and a pressure sensing part 24; the elastic support beam 21 comprises a support baffle 215 and an inwardly extending vortex structure, the vortex structure comprises a first half-circle structure 211, a second half-circle structure 212, a third half-circle structure 213 and a switching part 214 which are sequentially connected, the diameter of the first half-circle structure 211 is larger than that of the second half-circle structure 212, the diameter of the second half-circle structure 212 is larger than that of the third half-circle structure 213, the switching part 214 is connected with the cable support 22, and the cable support 22, the second half-circle structure 212 and the third half-circle structure 213 are arranged at intervals; one end of the supporting partition plate 215 is connected with the initial part of the first half-circle structure 211, and the other end is connected with the final part of the second half-circle structure 212, so that a closed cavity is formed inside the vortex structure; the connection part of the first half-circle structure 211 and the second half-circle structure 212 is provided with a raised pressure sensing part 24, and a first through hole for accommodating the sensing optical fiber 9 is arranged in the pressure sensing part 24; the left side of the adapter 214 is provided with a raised temperature sensing part 23, and a second through hole for accommodating the temperature measuring optical fiber 8 is arranged in the temperature sensing part 23; the cable support 22 is a hollow cylinder; the connection line between the center of the first through hole and the center of the cable bracket 22 is perpendicular to the connection line between the center of the second through hole and the center of the cable bracket 22;
the protective layer 6 is arranged outside the annular supporting layer 5; the protective layer 6 is externally provided with the sheath layer 7.
Optionally, a semicircular protruding column 13 is disposed at a position of the support frame 1 corresponding to the pressure sensing portion 24, and a minimum distance between the semicircular protruding column 13 and the pressure sensing portion 24 is 1-5mm. The semicircular convex columns 13 are arranged for reducing the stress area of the pressure sensing part 24 and improving the pressure sensing sensitivity of the pressure sensing optical fiber 9.
Optionally, the supporting arms 12 and the semicircular protruding columns 13 are distributed in an array structure along the axial direction of the reinforcing rib 11. The photovoltaic cable is convenient to bend, and is suitable for being stored and matched with special terrains.
Optionally, the elastic modulus of the supporting frame 1 is the same as that of the annular supporting layer 5, the elastic modulus of the supporting frame 1 is greater than that of the cable supporting structure 2, and the elastic modulus of the cable supporting structure 2 is greater than that of the filling layer 4. And the buffer performance of the photovoltaic cable is improved.
Optionally, the material of the support frame 1 is PPA added with metal wires or steel wires.
Optionally, the material of the cable supporting structure 2 is polyurethane added with nano materials, nano fibers or rubber particles.
Optionally, the cable 3 is a copper-aluminum alloy conductor, and a heat conduction insulating layer is filled in a gap between the cable 3 and the cable support 22.
Further, the inner wall of the temperature sensing portion 23 is provided with a through hole communicating with the cable bracket 22, so that the insulating material flows into the temperature sensing portion 23 together when the heat conductive insulating material is poured, and the gap between the temperature measuring optical fiber 8 and the temperature sensing portion 23 is filled, thereby increasing the sensing sensitivity of the cable temperature.
Optionally, the filling layer 4 is polyurethane foam, which plays a role of buffering.
Optionally, the protective layer 6 is a steel wire braided armor layer and is used for enhancing the protection function inside the photovoltaic cable.
Optionally, the material of the sheath layer 7 is halogen-free low-smoke polyolefin, and the halogen-free low-smoke polyolefin has good insulation property and flame retardance.
Optionally, a waterproof layer is arranged between the protective layer 6 and the sheath layer 7, and the waterproof layer is made of polyvinyl chloride rubber.
Optionally, a closed cavity formed inside the vortex structure in the cable supporting structure 2 is filled with inert gas or flame retardant liquid.
Further, when the temperature sensing portion 23 detects that the overall temperature of the photovoltaic cable is too high, when field treatment is inconvenient (such as a fire disaster, etc.), the starting end and the ending end of the photovoltaic cable can be opened, and cooling gas or liquid is introduced into a closed cavity formed inside the vortex structure in the cable supporting structure 2, so that stable operation of the photovoltaic cable in an extreme environment is ensured.
Optionally, holes for connecting the support frame 1 and the cable support structure 2 are provided on the annular support layer 5.
Illustratively, when manufacturing the photovoltaic cable, the method comprises the following steps:
step 1, finishing the fixed connection of the cable support structure 2, the temperature measuring optical fiber 8, the pressure sensing optical fiber 9 and the cable 2;
step 2, sequentially connecting the support frame 1 and the cable support structure 2 to the annular support layer 5, and pouring a filling layer 4 at a gap;
and 3, arranging the protective layer 6 and the sheath layer 7 outside the annular supporting layer 5 in sequence.
Principle of pressure sensing and temperature measurement of photovoltaic cable: the temperature measuring optical fiber 8 continuously monitors the temperature of the axial designated position of the cable 3 by combining the Raman scattering principle with the optical time domain reflection technology; the sensing optical fiber 9 is an array type fiber grating sensor, the array type fiber grating sensor is composed of a plurality of fiber grating sensors with different center wavelengths, when the pressure of each point distributed along the line is changed, the wavelength of reflected light of the fiber grating sensor at the corresponding position is changed, the size of the wavelength change is detected by a fiber grating demodulator and is converted into an electric signal, and the pressure of the corresponding point of the structure to be detected is calculated, so that the pressure distribution condition of the photovoltaic cable is obtained. When the photovoltaic cable is subjected to external pressure, the annular supporting layer 5 deforms radially, the cable supporting structure 2 is driven to move towards the semicircular convex columns 13, and external pressure measurement is achieved by extruding the pressure sensing part 24.
Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. A high reliability photovoltaic cable, the photovoltaic cable comprising: the cable comprises a support frame, a cable support structure, a cable, a filling layer, an annular support layer, a protective layer, a sheath layer, a temperature measuring optical fiber and a pressure sensing optical fiber;
the support frame comprises a reinforcing rib and a support arm; the reinforcing ribs are of cylindrical strip structures, the supporting arms are arranged on the periphery of the reinforcing ribs, and the number of the supporting arms is three and distributed along the radial direction of the reinforcing ribs at equal intervals; the annular supporting layer is arranged on the outer side of the supporting frame, the annular supporting layer and the reinforcing ribs are concentrically arranged, and the inner side of the annular supporting layer is connected with the supporting arm;
the cable supporting structures are arranged on the inner periphery of the annular supporting layer, and the number of the cable supporting structures is three and the cable supporting structures are distributed at equal intervals along the radial direction of the annular supporting layer; the annular supporting layer and the supporting arm divide the axial section of the photovoltaic cable into three closed spaces with the same size; the middle position in each enclosed space is provided with one cable supporting structure; the number of the cables is the same as that of the cable supporting structures, and the cables are respectively arranged in the corresponding cable supporting structures;
the cable supporting structure comprises an elastic supporting beam, a cable bracket, a temperature sensing part and a pressure sensing part; the elastic support beam comprises a support baffle and an inwardly extending vortex structure, the vortex structure comprises a first half-circle structure, a second half-circle structure, a third half-circle structure and a switching part which are sequentially connected, the diameter of the first half-circle structure is larger than that of the second half-circle structure, the diameter of the second half-circle structure is larger than that of the third half-circle structure, the switching part is connected with the cable support, and the cable support, the second half-circle structure and the third half-circle structure are arranged at intervals; one end of the supporting partition plate is connected with the initial part of the first half-circle structure, and the other end of the supporting partition plate is connected with the final part of the second half-circle structure, so that a closed cavity is formed inside the vortex structure; the connection part of the first half-circle structure and the second half-circle structure is provided with a raised pressure sensing part, and a first through hole for accommodating the pressure sensing optical fiber is formed in the pressure sensing part; the left side of the switching part is provided with a raised temperature sensing part, and a second through hole for accommodating the temperature measuring optical fiber is formed in the temperature sensing part; the cable support is a hollow cylinder; the connecting line of the circle center of the first through hole and the circle center of the cable bracket is perpendicular to the connecting line of the circle center of the second through hole and the circle center of the cable bracket;
the protective layer is arranged outside the annular supporting layer; the protective layer is arranged outside the protective layer.
2. The photovoltaic cable of claim 1, wherein the support frame is provided with semicircular protruding columns at positions corresponding to the pressure sensing parts, and the minimum distance between the semicircular protruding columns and the pressure sensing parts is 1-5mm.
3. The photovoltaic cable of claim 2, wherein the support arms and the semicircular protruding columns are distributed in an array structure along the axial direction of the reinforcing ribs.
4. The photovoltaic cable of claim 1, wherein the support shelf has a modulus of elasticity that is the same as the annular support layer, the support shelf having a modulus of elasticity that is greater than a modulus of elasticity of the cable support structure, the cable support structure having a modulus of elasticity that is greater than a modulus of elasticity of the filler layer.
5. The photovoltaic cable of claim 1, wherein the cable is a copper-aluminum alloy conductor and a thermally conductive insulating layer is filled in a gap between the cable and the cable support.
6. The photovoltaic cable of claim 5, wherein the inner wall of the temperature sensing part is provided with a through hole communicated with the cable bracket, and when the heat conducting insulating material is poured, the insulating material flows into the temperature sensing part together, so that a gap between the temperature measuring optical fiber and the temperature sensing part is filled.
7. The photovoltaic cable of claim 1, wherein the protective layer is a steel wire braided armor layer.
8. The photovoltaic cable of claim 1, wherein the sheath layer is a halogen-free low smoke polyolefin.
9. The photovoltaic cable of claim 1, wherein a waterproof layer is arranged between the protective layer and the sheath layer, and the waterproof layer is made of polyvinyl chloride rubber.
10. The photovoltaic cable of claim 1, wherein the cable support structure has a closed cavity formed inside a vortex structure filled with an inert gas or a flame retardant liquid; when the temperature sensing part detects that the whole temperature of the photovoltaic cable is too high, the starting end and the ending end of the photovoltaic cable are opened, and cooling gas or liquid is introduced into a closed cavity formed in the vortex structure in the cable supporting structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410257878.7A CN117854823A (en) | 2024-03-07 | 2024-03-07 | High-reliability photovoltaic cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410257878.7A CN117854823A (en) | 2024-03-07 | 2024-03-07 | High-reliability photovoltaic cable |
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| Publication Number | Publication Date |
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| CN117854823A true CN117854823A (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410257878.7A Pending CN117854823A (en) | 2024-03-07 | 2024-03-07 | High-reliability photovoltaic cable |
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| Country | Link |
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| CN (1) | CN117854823A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4711523A (en) * | 1983-08-11 | 1987-12-08 | Dainichi-Nippon Cables, Ltd. | Waterproof optical fiber cable |
| CN102707394A (en) * | 2011-03-28 | 2012-10-03 | 东捷光电科技(苏州)有限公司 | Oil field detection optical cable |
| CN206236465U (en) * | 2016-12-21 | 2017-06-09 | 安徽蒙特尔电缆集团有限公司 | A kind of anti-extrusion cable of high resiliency |
| CN212061988U (en) * | 2020-05-29 | 2020-12-01 | 明达线缆集团有限公司 | On-line monitoring safety type medium-voltage photoelectric composite cable |
| CN115101246A (en) * | 2022-07-27 | 2022-09-23 | 杭州捷孚电子技术有限公司 | Power cable for intelligent data acquisition |
-
2024
- 2024-03-07 CN CN202410257878.7A patent/CN117854823A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4711523A (en) * | 1983-08-11 | 1987-12-08 | Dainichi-Nippon Cables, Ltd. | Waterproof optical fiber cable |
| CN102707394A (en) * | 2011-03-28 | 2012-10-03 | 东捷光电科技(苏州)有限公司 | Oil field detection optical cable |
| CN206236465U (en) * | 2016-12-21 | 2017-06-09 | 安徽蒙特尔电缆集团有限公司 | A kind of anti-extrusion cable of high resiliency |
| CN212061988U (en) * | 2020-05-29 | 2020-12-01 | 明达线缆集团有限公司 | On-line monitoring safety type medium-voltage photoelectric composite cable |
| CN115101246A (en) * | 2022-07-27 | 2022-09-23 | 杭州捷孚电子技术有限公司 | Power cable for intelligent data acquisition |
Non-Patent Citations (1)
| Title |
|---|
| 梁学民: "《现代铝电解设计与智能化》", 31 December 2020, 冶金工业出版社, pages: 719 * |
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