CN110265802B - Superconducting cable end connecting structure based on YBCO superconducting material - Google Patents
Superconducting cable end connecting structure based on YBCO superconducting material Download PDFInfo
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- CN110265802B CN110265802B CN201910533845.XA CN201910533845A CN110265802B CN 110265802 B CN110265802 B CN 110265802B CN 201910533845 A CN201910533845 A CN 201910533845A CN 110265802 B CN110265802 B CN 110265802B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/68—Connections to or between superconductive connectors
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- 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
Abstract
The invention relates to the technical field of superconducting cables, in particular to a superconducting cable end connecting structure based on YBCO superconducting materials. The superconducting cable is sequentially provided with a wire core, a first low-temperature cold insulating layer, a superconducting layer, a second low-temperature cold insulating layer, a support ring, a low-temperature pipeline, an armored copper wire and an outer protective layer from inside to outside along the radial direction of the superconducting cable. And a cut-off sheath is arranged at the end part of the superconducting cable. The end connection structure includes: the sinle silk passes inside the hollow copper pipe and connects, and low temperature cold insulation layer and superconductive layer all connect through spiral coiling, and the low temperature pipeline directly docks, and the low temperature pipeline outside extrusion molding one deck outer jacket after connecting stimulates the tighrening ring and will the tighrening ring fastening accomplishes the connection on the link. The invention is convenient to operate in the field of superconducting cable connection, reduces the abrasion of a superconducting cable, reduces the condition of Joule loss and reduces the condition of heat leakage caused by electric connection of an external current lead.
Description
Technical Field
The invention relates to the technical field of superconducting cables, in particular to a superconducting cable end connecting structure based on YBCO superconducting materials.
Background
The superconducting cable is designed and manufactured by utilizing the characteristics that the superconductivity becomes a zero-resistance superconducting state at the critical temperature, the current density is high, and the superconducting cable can bear large current. The superconducting cable is a novel cable on the market, and a plurality of connections are needed when a single superconducting cable is laid in a limited long distance. When connecting, the connection is required to be performed through the connection of a carrier layer, the connection of a cold insulation layer, the connection of a low temperature layer pipeline and the like.
The superconducting cable is created in the market at present, a superconducting cable made of a novel YBCO superconducting material appears, the cable is researched and produced based on the material of the YBCO superconducting material, and the superconducting cable appearing in the market at present has the following defects in use:
1. when two superconducting cables are connected, the outer protective layer on the outer side needs to be directly cut and cut off, and the installation and connection time needs to be influenced by an external cutting device;
2. when two superconducting cables are connected, the connection is inconvenient, the cable core is easy to expose at the connection position, and the accident probability is increased;
3. with resistance welding, joule loss is introduced;
4. the electrical connection of the external current leads results in a large heat leak.
Disclosure of Invention
The invention aims to provide a superconducting cable end part connecting structure based on YBCO superconducting materials, which is suitable for superconducting-superconducting connection and solves the problems of complicated connecting wire core and inconvenient connection with a superconducting cable in the current market, which are provided by the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a superconducting cable end part connecting structure based on a YBCO superconducting material is characterized in that a wire core, a first low-temperature cold insulating layer, a superconducting layer, a second low-temperature cold insulating layer, a support ring, a low-temperature pipeline, an armored copper wire and an outer protective layer are sequentially arranged on the superconducting cable from inside to outside along the radial direction of the superconducting cable; the end connection structure includes:
the wire cores of the end parts of the adjacent superconducting cables penetrate through the hollow copper pipe to be connected;
the first low-temperature cold insulation layers at the end parts of the adjacent superconducting cables are connected by spirally winding carbon paper or cold insulation materials outside the hollow copper pipe;
on the outer side of the first low-temperature cold insulation layer, the superconducting layers at the end parts of the adjacent superconducting cables are spirally wound and connected by using YBCO superconducting tapes, and after the spiral winding is finished, the superconducting layers are welded and connected at the two ends of the connecting end of the superconducting layer;
the second low-temperature cold insulation layers at the end parts of the adjacent superconducting cables are connected by adopting carbon paper or cold insulation material semi-lap spiral winding at the outer side of the superconducting layer connecting end;
the superconducting cable of which the second low-temperature cold insulating layer is connected is integrated inside a low-temperature pipe for connection, and the low-temperature pipe for connection is butted with low-temperature pipelines at the end parts of the superconducting cables at two ends to form a low-temperature pipeline connecting end;
extruding a layer of outer protection layer on the outer surface of the connecting end of the low-temperature pipeline to obtain a conversion joint;
the outer side of the outer protection layer at the end part of the superconducting cable is also provided with a connecting sleeve and a fastening ring, the connecting sleeve and the fastening ring are both sleeved outside the outer protection layer of the superconducting cable and are connected with the fastening ring through an elastic connecting rope, and when two superconducting cables are connected, the connecting sleeve is fixed at the end part of the superconducting cable and is pulled to pull the fastening ring and fasten the fastening ring on the outer surface of the conversion joint.
Furthermore, a cut-off sheath is arranged at the end part of the superconducting cable, the cut-off sheath is of a multi-layer structure, the layer structure of the cut-off sheath arranged from inside to outside along the radial direction of the cut-off sheath corresponds to the superconducting cable, and the layer structures of the cut-off sheath except the core are connected with the corresponding superconducting cable layer structure through a virtual broken line; when two adjacent superconducting cables are connected, the cut-off sheath is directly torn off, and the end parts of the superconducting cables sequentially expose an armored copper wire, a support ring, a high-voltage layer, a superconducting layer, a high-voltage insulating layer and a low-temperature pipeline.
Furthermore, the cryogenic pipe for connection has no diameter difference with cryogenic pipelines at the end parts of the superconducting cables at the two ends.
Further, a copper ring is used for sealing a knife edge at the outer side of the joint of the low-temperature pipe for connection and the end parts of the superconducting cables at the two ends.
Furthermore, the connection surface between the cryogenic pipe for connection and the cryogenic pipeline at the end parts of the superconducting cables at the two ends is an inclined surface.
Furthermore, the hollow copper pipe is a compression copper pipe so as to connect the wire cores with each other.
Furthermore, the fastening ring is made of elastic materials.
Furthermore, the connecting sleeve and the fastening ring are provided with positioning holes matched with the connecting rope.
Compared with the prior art, the invention has the beneficial effects that:
1) according to the superconducting cable, the cut-off sheath is arranged at the end part, when the superconducting cable layer structure is cut in sequence, the force is applied to the cut-off sheath connected with the end part of the superconducting cable through the virtual broken line, the cut-off sheath is rotated and torn, the cut-off sheath is separated from the end part of the superconducting cable, the cut-off sheath is directly peeled off, the cutting use of external equipment is reduced, and the abrasion of the superconducting cable is reduced.
2) The wire cores are rotatably connected inside the hollow copper pipe, so that the problem of wire core exposure is avoided.
3) After the superconducting cable is connected, the fastening ring is pulled outside the adapter, the connecting rope driven by the fastening ring is buckled with the positioning hole, the fastening ring is sleeved on the outer surface of the adapter, the adapter is directly protected, and the connection is safer and more convenient.
4) The first low-temperature cold insulating layer and the second low-temperature cold insulating layer are both connected in a complementary mode through carbon paper or cold insulating materials, and the situation that heat leakage occurs when an external current lead is electrically connected is reduced.
5) The low-temperature pipeline is cut into inclined planes for butt joint, and the middle part is sealed by a copper ring at the knife edge, so that the sealing performance is enhanced.
6) The superconducting layer bridges a section of superconducting cable in an external lap welding mode, so that the condition of Joule loss is reduced;
7) when the superconducting cable is connected, the resistance can be reduced to 10-7Ohm/n, wherein n is the number of the parallel spirally wound superconducting tapes.
Drawings
FIG. 1 is a schematic view showing a main structure of a superconducting cable according to the present invention;
fig. 2 is a schematic sectional view of a superconducting cable according to the present invention;
FIG. 3 is a schematic view of a cable and adapter connection according to the present invention;
fig. 4 is a schematic view showing a development structure of the fastening ring and the connection sleeve when the adjacent superconducting cables are connected according to the present invention;
FIG. 5 is a schematic view of the connection structure of the core inside the hollow copper tube according to the present invention;
FIG. 6 is a schematic view of the connection structure of the cryogenic pipe according to the present invention;
FIG. 7 is a schematic view of a superconducting layer connection structure according to the present invention;
in the figure: 1. the cable comprises a cable core, 2, a first low-temperature cold insulation layer, 3, a superconducting layer, 4, a second low-temperature cold insulation layer, 5, a support ring, 6, a low-temperature pipeline, 7, an armored copper wire, 8, an outer protection layer, 10, a conversion joint, 11, a cut-off sheath, 12, a virtual broken line, 13, a connecting sleeve, 14, an elastic connecting rope, 15, a fastening ring, 16, a positioning hole, 17, a hollow copper pipe, 18, a knife edge, 19 and a superconducting connecting end.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention discloses a superconducting cable based on a YBCO superconducting material, as shown in figures 1 and 2, the superconducting cable is sequentially provided with a wire core 1, a first low-temperature cold insulating layer 2, a superconducting layer 3, a second low-temperature cold insulating layer 4, a support ring 5, a low-temperature pipeline 6, an armored copper wire 7 and an outer protective layer 8 from inside to outside along the radial direction of the superconducting cable.
The cable core 1 is formed by stranding a plurality of copper wires with the diameter of 1mm, the copper wires are electrician pure copper, the first low-temperature cold insulation layer 2 and the second low-temperature cold insulation layer 4 are formed by spirally winding cold insulation materials in a half-lap-covered mode, the cold insulation materials can be PP L P (polypropylene laminated paper) or polyimide films, the first low-temperature cold insulation layer 2 is wound on the outer surface of the cable core 1, the superconducting layer 3 is a YBCO high-temperature superconducting tape multi-layer parallel spiral winding structure and is wound on the outer surface of the first low-temperature cold insulation layer 2, the second low-temperature cold insulation layer 4 is wound on the outer surface of the superconducting layer 3, the support ring is a support ring structure with the interval width of 10cm and is made of a tetrafluoro material, the support ring is directly sleeved on the outer side of the second low-temperature cold insulation layer 4, the cable core 1, the first low-temperature cold insulation layer 2, the superconducting layer 3, the second low-temperature cold insulation layer 4 and the support ring 5 are integrated inside the low-temperature pipeline 6, the low-temperature corrugated pipe is a vacuum dewar pipe and is made of a non-magnetic stainless steel cross-linked spiral cable.
The inner side of the superconducting layer 7 is also uniformly provided with a plurality of signal receiving grooves for transmitting voltage signals.
A superconducting cable end connection structure based on a YBCO superconducting material, comprising:
the core 1 of the adjacent superconducting cable end is connected through the inside of the hollow copper tube 17 as shown in fig. 5. Wherein the hollow copper tube 17 is a compression copper tube to connect the wire cores 1 to each other.
And (3) performing half-lap spiral winding on the first low-temperature cold insulation layers 2 at the end parts of the adjacent superconducting cables at the outer sides of the hollow copper pipes 17 by using carbon paper or cold insulation materials according to the screw pitch of the first low-temperature cold insulation layers 2 to complete connection, so as to obtain the connecting end of the first low-temperature cold insulation layers 2.
On the outer side of the connecting end of the first low-temperature cold insulation layer 2, the superconducting layers at the end parts of the adjacent superconducting cables are spirally wound and connected by using YBCO superconducting tapes, and after the spiral winding is completed, the superconducting layers are welded and connected at two ends of the connecting end of the superconducting layers, as shown in fig. 7.
And performing half-lap spiral winding on the second low-temperature cold insulation layers 4 at the end parts of the adjacent superconducting cables at the outer sides of the superconducting layer connecting ends by using carbon paper or cold insulation materials according to the screw pitch of the second low-temperature cold insulation layers 4 to complete connection, thereby obtaining the connecting ends of the second low-temperature cold insulation layers 4.
The connecting end of the second cryogenic cold insulation layer 4 is integrated in a cryogenic pipe for connection, and the cryogenic pipe for connection and the cryogenic pipe 6 at the end of the superconducting cable at two ends are butted to form a cryogenic pipe connecting end, wherein the cryogenic pipe for connection and the cryogenic pipe 6 at the end of the superconducting cable at two ends have no diameter difference, as shown in fig. 6. And a copper ring is used for sealing a knife edge at the outer side of the joint of the low-temperature pipe for connection and the low-temperature pipeline at the end part of the superconducting cable at two ends. The connection surface of the low-temperature pipe for connection and the low-temperature pipeline at the end parts of the superconducting cables at the two ends is an inclined surface, so that the sealing performance is enhanced.
And extruding an outer protective layer on the outer surface of the connecting end of the low-temperature pipeline to obtain the adapter 10.
The outer side of the outer sheath 8 at the end part of the superconducting cable is also provided with a connecting sleeve 13 and a fastening ring 15, the connecting sleeve 13 and the fastening ring 15 are both sleeved on the outer side of the outer sheath of the superconducting cable, and the connecting sleeve 13 is connected with the fastening ring 15 through an elastic connecting rope 14. Fixing the connecting sleeve 13 at the end of the superconducting cable, pulling the fastening ring 15 and fastening the fastening ring 15 on the outer surface of the outer sheath of the crossover joint, and covering the elastic connecting rope 14 on the outer surface of the crossover joint to complete the connection of the superconducting cable, as shown in fig. 4. The fastening ring 15 is made of an elastic material. The connecting sleeve 13 and the fastening ring 15 are provided with positioning holes 16 corresponding to the connecting ropes.
Preferably, a cut-off sheath 11 is arranged at the end part of the superconducting cable, the cut-off sheath 11 is of a multilayer structure, the layer structure of the cut-off sheath 11 arranged from inside to outside along the radial direction corresponds to the superconducting cable, and the layer structures of the cut-off sheath 11 except the cable core 1 are connected with the corresponding superconducting cable layer structure through a virtual broken line 12; when two adjacent superconducting cables are connected, the cut-off sheath 11 is directly torn off, and the end parts of the superconducting cables are sequentially exposed out of the armored copper wire, the support ring, the high-voltage layer, the superconducting layer, the high-voltage insulating layer and the low-temperature pipeline. The diameter reducing treatment can be directly carried out on the wire core 1, so that the cutting use of external equipment is reduced, and the abrasion of the superconducting cable is also reduced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A superconducting cable end connection structure based on YBCO superconducting material is characterized in that: the superconducting cable is sequentially provided with a wire core (1), a first low-temperature cold insulating layer (2), a superconducting layer (3), a second low-temperature cold insulating layer (4), a support ring (5), a low-temperature pipeline (6), an armored copper wire (7) and an outer protective layer (8) from inside to outside along the radial direction of the superconducting cable; the end connection structure includes:
the wire cores (1) at the end parts of the adjacent superconducting cables penetrate through the hollow copper pipe (17) to be connected;
the first low-temperature cold insulation layers (2) at the end parts of the adjacent superconducting cables are spirally wound by using carbon paper or cold insulation materials to complete connection at the outer sides of the hollow copper pipes (17);
on the outer side of the first low-temperature cold insulation layer (2), the superconducting layers at the end parts of the adjacent superconducting cables are spirally wound and connected by using YBCO superconducting tapes, and after the spiral winding is finished, the superconducting layers are welded and connected at two ends of the connecting end of the superconducting layer;
the second low-temperature cold insulation layers (4) at the end parts of the adjacent superconducting cables are connected by spirally winding carbon paper or cold insulation materials in a half-lap-bag manner at the outer sides of the superconducting layer connecting ends;
the superconducting cable of which the second low-temperature cold insulation layer (4) is connected is integrated inside a low-temperature pipe for connection, and the low-temperature pipe for connection is butted with low-temperature pipelines (6) at the end parts of the superconducting cables at two ends to form a low-temperature pipeline connecting end;
extruding a layer of outer protective layer on the outer surface of the connecting end of the low-temperature pipeline to obtain a conversion joint (10);
the outside of superconducting cable tip outer jacket (8) still is equipped with adapter sleeve (13) and tighrening ring (15), adapter sleeve (13) and tighrening ring (15) all overlap the superconducting cable outer jacket outside, just adapter sleeve (13) are connected through elastic connection rope (14) tighrening ring (15), when two superconducting cables connect, adapter sleeve (13) are fixed superconducting cable's tip is motionless, the pulling tighrening ring (15) and with tighrening ring (15) fastening is on crossover sub's surface (10).
2. A superconducting cable end connection structure based on a YBCO superconducting material according to claim 1, characterized in that: the end part of the superconducting cable is provided with a cut-off sheath (11), the cut-off sheath (11) is of a multilayer structure, the layer structure of the cut-off sheath (11) arranged from inside to outside along the radial direction corresponds to the superconducting cable, and the layer structures of the cut-off sheath (11) except the wire core (1) are connected with the corresponding superconducting cable layer structure through a virtual broken line (12); when two adjacent superconducting cables are connected, the cut-off sheath (11) is directly torn off, and the end parts of the superconducting cables are sequentially exposed out of the armored copper wire, the support ring, the high-voltage layer, the superconducting layer, the high-voltage insulating layer and the low-temperature pipeline.
3. A superconducting cable end connection structure based on a YBCO superconducting material according to claim 1, characterized in that: the cryogenic pipe for connection has no diameter difference with cryogenic pipelines (6) at the end parts of the superconducting cables at two ends.
4. A superconducting cable end connection structure based on a YBCO superconducting material according to claim 1, characterized in that: and a copper ring is used for sealing a knife edge at the outer side of the joint of the low-temperature pipe for connection and the low-temperature pipeline at the end part of the superconducting cable at two ends.
5. A superconducting cable end connection structure based on a YBCO superconducting material according to claim 1, characterized in that: the connection surface of the low-temperature pipe for connection and the low-temperature pipeline at the end parts of the superconducting cables at the two ends is an inclined surface.
6. A superconducting cable end connection structure based on a YBCO superconducting material according to claim 1, characterized in that: the hollow copper pipe (17) is a compression copper pipe so as to connect the wire cores (1) with each other.
7. A superconducting cable end connection structure based on a YBCO superconducting material according to claim 1, characterized in that: the fastening ring (15) is made of elastic materials.
8. A superconducting cable end connection structure based on a YBCO superconducting material according to claim 1, characterized in that: the connecting sleeve (13) and the fastening ring (15) are provided with positioning holes (16) matched with the connecting ropes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910533845.XA CN110265802B (en) | 2019-06-19 | 2019-06-19 | Superconducting cable end connecting structure based on YBCO superconducting material |
| PCT/CN2019/119148 WO2020253086A1 (en) | 2019-06-19 | 2019-11-18 | Ybco superconducting-material-based superconduction cable end-portion connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910533845.XA CN110265802B (en) | 2019-06-19 | 2019-06-19 | Superconducting cable end connecting structure based on YBCO superconducting material |
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| CN110265802A CN110265802A (en) | 2019-09-20 |
| CN110265802B true CN110265802B (en) | 2020-07-14 |
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| WO (1) | WO2020253086A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110265845B (en) * | 2019-06-19 | 2020-07-14 | 东部超导科技（苏州）有限公司 | Superconducting cable connection method based on YBCO superconducting material |
| CN110265802B (en) * | 2019-06-19 | 2020-07-14 | 东部超导科技（苏州）有限公司 | Superconducting cable end connecting structure based on YBCO superconducting material |
| CN110136883B (en) * | 2019-06-19 | 2020-07-14 | 东部超导科技（苏州）有限公司 | Superconducting cable based on YBCO superconducting material and convenient to connect |
| CN113689990B (en) * | 2021-08-27 | 2023-07-07 | 深圳供电局有限公司 | Annular electrode device for connecting high-temperature superconductive strip |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003141946A (en) * | 2001-11-02 | 2003-05-16 | Sumitomo Electric Ind Ltd | Superconducting cable |
| KR101598223B1 (en) * | 2009-02-11 | 2016-02-29 | 엘에스전선 주식회사 | Connecting Structure of Terminal for Super Conductor Cable |
| JP5711571B2 (en) * | 2011-03-02 | 2015-05-07 | 矢崎総業株式会社 | Coaxial cable terminal processing structure and terminal processing method |
| CN103098147B (en) * | 2011-03-17 | 2016-02-24 | 古河电气工业株式会社 | The fixed structure of hyperconductive cable and the fixed structure of superconducting cable line |
| FR3010847B1 (en) * | 2013-09-19 | 2017-12-29 | Nexans | JUNCTION OF SUPERCONDUCTING CABLES |
| JP5807849B2 (en) * | 2014-03-13 | 2015-11-10 | 住友電気工業株式会社 | Intermediate connection member of superconducting cable and intermediate connection structure of superconducting cable |
| CN104682024B (en) * | 2015-03-05 | 2016-10-19 | 清华大学 | A kind of multistage attachment means of dual current path high-temperature superconductive cable |
| CN110265845B (en) * | 2019-06-19 | 2020-07-14 | 东部超导科技（苏州）有限公司 | Superconducting cable connection method based on YBCO superconducting material |
| CN110265802B (en) * | 2019-06-19 | 2020-07-14 | 东部超导科技（苏州）有限公司 | Superconducting cable end connecting structure based on YBCO superconducting material |
| CN110136883B (en) * | 2019-06-19 | 2020-07-14 | 东部超导科技（苏州）有限公司 | Superconducting cable based on YBCO superconducting material and convenient to connect |
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- 2019-06-19 CN CN201910533845.XA patent/CN110265802B/en active Active
- 2019-11-18 WO PCT/CN2019/119148 patent/WO2020253086A1/en active Application Filing
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| CN110265802A (en) | 2019-09-20 |
| WO2020253086A1 (en) | 2020-12-24 |
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