CN113470886A - Superconducting cable structure - Google Patents
Superconducting cable structure Download PDFInfo
- Publication number
- CN113470886A CN113470886A CN202110862641.8A CN202110862641A CN113470886A CN 113470886 A CN113470886 A CN 113470886A CN 202110862641 A CN202110862641 A CN 202110862641A CN 113470886 A CN113470886 A CN 113470886A
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- Prior art keywords
- superconducting cable
- superconducting
- inner tube
- outer shell
- cable structure
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- 239000000463 material Substances 0.000 claims abstract description 7
- 239000004020 conductor Substances 0.000 claims description 16
- 238000009413 insulation Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 4
- 229920002313 fluoropolymer Polymers 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 3
- 239000002826 coolant Substances 0.000 abstract description 6
- 239000002346 layers by function Substances 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000005457 Black-body radiation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/16—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by cooling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
The present invention discloses a superconducting cable structure, including: the outer shell is sleeved outside the inner pipe; the outer shell is provided with first fold structures at intervals along the axial direction, and the inner pipe is provided with second fold structures at intervals along the axial direction; the outer surface of the inner pipe is provided with a plurality of supporting arms along the circumference, and the other ends of the supporting arms are connected with the inner surface of the shell. Above-mentioned superconducting cable structure is provided with first fold structure and second fold structure on shell and inner tube respectively on the one hand, can enough prevent the inside material shrink problem that brings when using cooling medium to refrigerate of cable, can avoid superconducting cable to receive external factors influence and arouse tensile deformation again, and simple structure and easily realization, on the other hand are provided with the support arm, when making the cable appear flexible the deformation, and other functional layers of setting between inner tube and shell avoid damaging, and the practicality is stronger.
Description
Technical Field
The invention relates to the technical field of superconducting cables, in particular to a superconducting cable structure.
Background
The superconducting cable is a new type of cable designed and manufactured by using the characteristic that the superconducting material is in a superconducting state at the critical temperature, and the superconducting cable can be divided into a low-temperature superconducting cable and a high-temperature superconducting cable according to the different materials.
The basic structure of the high-temperature superconducting cable is greatly different from that of the conventional cable, and an inner supporting tube, a cable conductor, a thermal insulation layer, an electric insulation layer, a cable shielding layer and a sheath layer are generally arranged in sequence from inside to outside. The inner supporting pipe is used as a reference supporting body of the superconducting strip and is also a liquid nitrogen cooling circulating pipeline; the heat insulation layer is generally made of a coaxial double-layer metal pipe, the space between the two layers of pipes is vacuumized and is embedded with a plurality of layers of radiation-proof metal foils, so that the heat insulation between the cable superconducting conductor and the external environment can be realized, and the low-temperature environment in the superconducting conductor is ensured; the electric insulation layer is sleeved outside the thermal insulation layer, usually a normal-temperature insulation superconducting cable, the electric insulation layer is arranged inside or outside the thermal insulation layer, and the cable shielding layer and the protective layer are similar to those of a conventional power cable, namely electromagnetic shielding is realized, so that short-circuit protection, protection of various external environments and the like can be realized.
The superconducting cable is suitable for long-distance electric energy transmission, but the inside of the superconducting cable is refrigerated by using liquid nitrogen, so that the material is easy to shrink, and in the using process, the superconducting cable is likely to be stretched under the influence of external factors, and the superconducting cable is easy to deform and damage due to the deformation of the superconducting cable, so that the normal power transmission work is influenced.
Disclosure of Invention
In view of the above problems, the present invention provides a superconducting cable structure capable of effectively preventing the problem of damage to the superconducting cable due to contraction or extension.
In a first aspect, the present invention provides a superconducting cable structure, comprising an inner pipe and an outer shell sleeved outside the inner pipe; the outer shell is provided with first fold structures at intervals along the axial direction, and the inner pipe is provided with second fold structures at intervals along the axial direction; the outer surface of the inner pipe is provided with a plurality of supporting arms along the circumference, and the other ends of the supporting arms are connected with the inner surface of the shell.
Optionally, the inner part of the inner tube is a low-temperature cooling channel.
Optionally, an annular space is formed between the inner tube and the outer shell, and the annular space and the cryogenic cooling passage are connected at the ends of the outer shell and the inner tube.
Optionally, a plurality of superconducting conductors are spirally wound on the outer surface of the inner tube, and the superconducting conductors are twisted.
Optionally, the superconducting conductors and the inner tube, and the plurality of superconducting conductors are bonded by using low-temperature glue.
Optionally, a heat insulating layer is arranged between the outer shell and the inner pipe.
Optionally, the heat insulating layer is made of fluoroplastic.
Optionally, the first pleat structure is integrally connected to the housing; the second corrugated structure is connected with the inner pipe in a welding or bonding mode.
Optionally, the first and second corrugation structures are both arranged in a corrugated structure or a spiral structure.
Optionally, the number of the support arms is greater than or equal to 2, and the support arms are uniformly arranged along the circumferential direction of the inner pipe.
Compared with the prior art, the invention has the beneficial effects that:
the superconducting cable structure provided by the invention has the advantages that the first fold structure and the second fold structure are respectively arranged on the outer shell and the inner tube, so that the problem of material shrinkage caused by cooling medium used for refrigeration in the cable can be prevented, the superconducting cable can be prevented from being subjected to tensile deformation caused by the influence of external factors, the structure is simple and easy to realize, and the supporting arm is arranged on the other hand, so that other functional layers arranged between the inner tube and the outer shell are prevented from being damaged when the cable is subjected to telescopic deformation, and the practicability is higher.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a superconducting cable structure provided by an embodiment of the present invention;
fig. 2 is a plan view of a superconducting cable structure provided in an embodiment of the present invention.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a superconducting cable structure, specifically comprising an inner tube 2 and an outer shell 1 sleeved outside the inner tube 2, wherein the outer shell 1 is provided with first corrugated structures 3 at intervals along an axial direction, and the inner tube 2 is provided with second corrugated structures 4 at intervals along the axial direction; the outer surface of the inner pipe 2 is also provided with a plurality of supporting arms 5 along the circumferential direction, and the other ends of the supporting arms 5 are connected with the inner surface of the outer shell 1.
It should be noted that the outer shell 1 according to the embodiment of the present invention is an improvement on a local structure of a cable shielding layer and a sheath layer in a conventional superconducting cable, and the inner tube 2 is an improvement on an inner support tube structure in a conventional superconducting cable, and by the above improvement, the superconducting cable can effectively avoid an influence of a change of external factors such as temperature and external force on the cable structure.
Specifically, the number of the support arms 5 is required to be 2 or more, and the plurality of support arms 5 are uniformly arranged in the circumferential direction of the inner tube 2. By providing the support arms 5, the inner tube 2 is not greatly displaced from the outer shell 1 by thermal contraction, and the intermediate functional layer covering the inner tube 2 is not damaged.
In this embodiment, the first corrugated structure 3 and the second corrugated structure 4 may be configured as a corrugated structure or a spiral structure, and both structures can prevent deformation phenomena such as elongation and shortening of the superconducting cable due to temperature change, thereby effectively avoiding the problem of pipeline damage.
In particular, the first corrugated structure 3 is integrally connected to the outer shell 1, and the second corrugated structure 4 is connected to the inner tube 2 by welding or bonding.
It will be appreciated that the interior of the inner tube 2 is provided with a cryogenic cooling channel to deliver a cryogenic cooling medium which may be liquid nitrogen or liquid helium.
Specifically, an annular space is formed between the outer shell 1 and the inner tube 2, and the annular space is connected with the low-temperature cooling passage at the end portions of the outer shell 1 and the inner tube 2.
So set up, both can make annular space and cryogenic cooling passageway all let in the cryogenic cooling medium of syntropy, also can make cryogenic cooling medium let in the back from cryogenic cooling passageway, again through the annular space reverse flow back to effectively improve the cooling effect, concrete implementation mode can be according to using the nimble setting of scene.
Specifically, the outer surface of the inner tube 2 is spirally wound with a plurality of superconducting conductors, and the plurality of superconducting conductors are twisted to increase the contact area between the superconducting conductors and the inner tube 2, so that the cooling effect is improved, and meanwhile, the current density can be improved, and the power transmission capacity is improved.
Specifically, the superconducting conductors and the inner tube 2 and the plurality of superconducting conductors are bonded by low-temperature glue, so that the superconducting cable structure is more stable, and micro-vibration is effectively prevented.
The low-temperature adhesive is prepared from special graft copolymer and alloy, ceramic, diamond and other powder, and has good performances of high curing speed, high bonding strength, oil resistance, temperature resistance, medium resistance, aging resistance for 8-15 years and the like in a low-temperature environment.
In the present embodiment, a heat insulating layer, specifically, a heat insulating film made of fluoroplastic, which has a single-layer structure, is provided between the outer casing 1 and the inner pipe 2.
The black body radiation coefficient of the heat insulation film is small, heat radiation can be prevented, and the heat insulation effect of the vacuum pipe fitting of the superconducting cable is further improved.
In this embodiment, a radiation protection film is further disposed between the outer shell 1 and the inner tube 2, and the radiation protection film is made of an aluminum-plated film.
Preferably, in a specific embodiment, the number of the support arms 5 may be set to 4, and referring to fig. 2, the 4 support arms 5 are uniformly arranged along the circumference of the inner tube 2.
Specifically, the 4 support arms 5 form a support group, and a plurality of support groups arranged at intervals can be formed along the axial direction of the inner tube 2.
It should be noted that, a more dense support group may be provided at the central portion of the superconducting cable, and a sparser support group may be provided at the two end portions, so as to prevent the inner tube 2 from shifting relative to the outer shell 1 due to expansion and contraction caused by temperature change, especially for the superconducting cable for short-distance application.
Specifically, the first corrugation structure 3 in the present embodiment is configured as a threaded pipe, and the threaded pipe and the inner pipe 2 are connected by welding.
According to the embodiment of the invention, the first fold structure and the second fold structure are respectively arranged on the outer shell and the inner tube, so that the problem of material shrinkage caused by using a cooling medium for refrigeration in the cable can be prevented, the superconducting cable can be prevented from being subjected to stretching deformation caused by the influence of external factors, and the structure is simple and easy to realize; meanwhile, the supporting arm is arranged, so that other functional layers arranged between the inner pipe and the shell are prevented from being damaged when the cable is subjected to telescopic deformation, and the practicability of the cable structure is higher than that of the existing superconducting cable structure.
It is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like in the present invention indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A superconducting cable structure, comprising:
the outer shell is sleeved outside the inner pipe;
the outer shell is provided with first fold structures at intervals along the axial direction, and the inner pipe is provided with second fold structures at intervals along the axial direction;
the outer surface of the inner pipe is provided with a plurality of supporting arms along the circumference, and the other ends of the supporting arms are connected with the inner surface of the shell.
2. The superconducting electrical cable structure of claim 1 wherein the interior of the inner tube is a cryogenic cooling passage.
3. A superconducting cable structure according to claim 2, characterized in that an annular space is formed between the inner tube and the outer shell, the annular space and the cryogenic cooling channel being connected at the ends of the outer shell and the inner tube.
4. A superconducting cable structure according to claim 1, wherein the outer surface of the inner tube is spirally wound with a plurality of superconducting conductors, the plurality of superconducting conductors being arranged in a twisted configuration.
5. The superconducting cable structure according to claim 4, wherein the superconducting conductors and the inner tube, and the plurality of superconducting conductors are bonded together by using low temperature glue.
6. A superconducting cable structure according to claim 1, characterized in that a heat insulating layer is provided between the outer shell and the inner tube.
7. A superconducting cable construction according to claim 6, wherein said thermal insulation layer is a fluoroplastic material.
8. Superconducting cable construction according to any of claims 1-7, characterized in that the first corrugated structure is integrally connected with the outer shell;
the second corrugated structure is connected with the inner pipe in a welding or bonding mode.
9. Superconducting cable construction according to any of claims 1-7, characterized in that the first and second corrugation are each provided as a corrugation or a helix.
10. The superconducting cable structure according to any one of claims 1 to 7, wherein the number of the supporting arms is 2 or more and is uniformly arranged in the circumferential direction of the inner pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110862641.8A CN113470886A (en) | 2021-07-28 | 2021-07-28 | Superconducting cable structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110862641.8A CN113470886A (en) | 2021-07-28 | 2021-07-28 | Superconducting cable structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113470886A true CN113470886A (en) | 2021-10-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110862641.8A Pending CN113470886A (en) | 2021-07-28 | 2021-07-28 | Superconducting cable structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113470886A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1815638A (en) * | 2005-01-31 | 2006-08-09 | Y.Y.L株式会社 | Superconducting power transmission cable and power transmission system |
| CN101281807A (en) * | 2007-04-04 | 2008-10-08 | 北京云电英纳超导电缆有限公司 | Superconducting cable for insulation and thermal insulation |
| CN208508171U (en) * | 2018-04-12 | 2019-02-15 | 深圳供电局有限公司 | A kind of scalable high-temperature superconductive lead wire |
| JP2020061276A (en) * | 2018-10-10 | 2020-04-16 | 昭和電線ケーブルシステム株式会社 | Intermediate connection of superconducting cables, superconducting cable line, and intermediate connection method for superconducting cables |
-
2021
- 2021-07-28 CN CN202110862641.8A patent/CN113470886A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1815638A (en) * | 2005-01-31 | 2006-08-09 | Y.Y.L株式会社 | Superconducting power transmission cable and power transmission system |
| CN101281807A (en) * | 2007-04-04 | 2008-10-08 | 北京云电英纳超导电缆有限公司 | Superconducting cable for insulation and thermal insulation |
| CN208508171U (en) * | 2018-04-12 | 2019-02-15 | 深圳供电局有限公司 | A kind of scalable high-temperature superconductive lead wire |
| JP2020061276A (en) * | 2018-10-10 | 2020-04-16 | 昭和電線ケーブルシステム株式会社 | Intermediate connection of superconducting cables, superconducting cable line, and intermediate connection method for superconducting cables |
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Application publication date: 20211001 |
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| RJ01 | Rejection of invention patent application after publication |