CN110265845B - Superconducting cable connection method based on YBCO superconducting material - Google Patents
Superconducting cable connection method based on YBCO superconducting material Download PDFInfo
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- CN110265845B CN110265845B CN201910533175.1A CN201910533175A CN110265845B CN 110265845 B CN110265845 B CN 110265845B CN 201910533175 A CN201910533175 A CN 201910533175A CN 110265845 B CN110265845 B CN 110265845B
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- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/033—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wrapping or unwrapping wire connections
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Abstract
The invention relates to the technical field of superconducting cables, in particular to a superconducting cable connection method 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 connection method comprises the following steps: 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 connection method 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 the outer protection layer is connected with an external adapter, the outer protection 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 the cable is connected with the adapter, the connection is inconvenient, the cable core is easily exposed at the connection position, and the accident occurrence probability is increased;
3. with resistance welding, joule loss is introduced;
4. the external current lead wire generates large heat leakage when being electrically connected;
disclosure of Invention
The invention aims to provide a superconducting cable connecting method based on YBCO superconducting materials, which is suitable for superconducting-superconducting connection and solves the problems of complicated connection wire core and inconvenient connection with a conversion joint 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 connection method based on YBCO superconducting material is characterized in that a 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 part of the superconducting cable is provided with a cut-off sheath, and the cut-off sheath is connected with the outer protective layer of the superconducting cable through a virtual broken line; the outer side of the outer protective 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 on the outer side of the outer protective layer of the superconducting cable, and the connecting sleeve is connected with the fastening ring through an elastic connecting rope;
the superconducting cable connecting method includes the steps of:
and 8, fixing the connecting sleeve at the end of the superconducting cable without moving, pulling the fastening ring and fastening the fastening ring on the outer surface of the outer protective layer of the adapter, wherein the elastic connecting rope covers the outer surface of the adapter, so that the superconducting cable is connected.
Furthermore, the fastening ring is made of elastic materials.
Further, in step 2, the hollow copper tube is a compression copper tube to connect the wire cores with each other.
Further, in step 6, a copper ring is used for sealing the outer side of the connection position of the low-temperature pipe for connection and the end parts of the superconducting cables at the two ends.
Further, in step 6, the connection surface between the cryogenic pipe for connection and the cryogenic pipe at the end of the superconducting cable at both ends is an inclined surface.
Compared with the prior art, the invention has the beneficial effects that:
1) according to the invention, by arranging the cut-off sheath, when the outer sheath is cut, force is applied to the cut-off sheath connected with the outer sheath through the virtual broken line, the cut-off sheath is rotated and torn, and the cut-off sheath is separated from the outer sheath, so that 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.
As shown in fig. 3, a cut-off sheath 11 is provided at an end of the superconducting cable, and the cut-off sheath 11 and the outer sheath 8 of the superconducting cable are connected by a broken line 12. The outer side of the outer sheath 8 at the end part of the superconducting cable is further 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.
The superconducting cable connecting method includes the steps of:
And 2, connecting the wire cores 1 at the end parts of the adjacent superconducting cables through the hollow copper pipe 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 ends of the first low-temperature cold insulation layers 2.
And 4, spirally winding and connecting superconducting layers at the end parts of adjacent superconducting cables at the outer sides of the connecting ends of the first low-temperature cold insulating layers 2 by using YBCO superconducting tapes, and welding and connecting the two ends of the connecting ends of the superconducting layers after the spiral winding is finished, as shown in fig. 7.
And 5, 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, so as to obtain the connecting ends of the second low-temperature cold insulation layers 4.
And 6, integrating the connecting end of the second cryogenic cold insulation layer 4 into a connecting cryogenic pipe, and butting the connecting cryogenic pipe with cryogenic pipelines 6 at the end parts of the superconducting cables at two ends to form a cryogenic pipeline connecting end, wherein the connecting cryogenic pipe has no diameter difference with the cryogenic pipelines 6 at the end parts of the superconducting cables at two ends, 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.
The connecting sleeve 13 and the fastening ring 15 are provided with positioning holes 16 corresponding to the connecting ropes.
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 (5)
1. A superconducting cable connection method based on YBCO superconducting materials is characterized in that 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) are sequentially arranged along the radial direction of the superconducting cable from inside to outside; a cut-off sheath (11) is arranged at the end part of the superconducting cable, and the cut-off sheath (11) is connected with the outer protective layer (8) of the superconducting cable through a virtual broken line (12); the outer side of the outer protective layer 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 protective layer of the superconducting cable, and the connecting sleeve (13) is connected with the fastening ring (15) through an elastic connecting rope (14);
the superconducting cable connecting method includes the steps of:
step 1, stripping off a cut-off sheath (11), stripping off layers except a wire core at the end part of the superconducting cable to be connected, and exposing an armored copper wire, a support ring, a high-voltage layer, a superconducting layer, a high-voltage insulating layer and a low-temperature pipeline;
step 2, connecting the wire cores (1) at the end parts of the adjacent superconducting cables through the hollow copper pipe (17);
step 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 to complete connection, so as to obtain connection ends of the first low-temperature cold insulation layers (2);
step 4, 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 finished, the superconducting layers are welded and connected at the two ends of the connecting end of the superconducting layers;
step 5, on the outer side of the superconducting layer connecting end, the second low-temperature cold insulating layers (4) at the end parts of the adjacent superconducting cables are connected by using carbon paper or cold insulating material half-lap spiral winding to obtain the connecting end of the second low-temperature cold insulating layers (4);
step 6, integrating the connecting end of the second low-temperature cold insulation layer (4) into a connecting low-temperature pipe, and butting the connecting low-temperature pipe and low-temperature pipelines (6) at the end parts of the superconducting cables at two ends to form a low-temperature pipeline connecting end, wherein the connecting low-temperature pipe and the low-temperature pipelines (6) at the end parts of the superconducting cables at two ends have no diameter difference;
step 7, 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);
and 8, fixing the connecting sleeve (13) at the end part of the superconducting cable without moving, pulling the fastening ring (15) and fastening the fastening ring (15) on the outer surface of the outer protective layer of the adapter, wherein the elastic connecting rope (14) covers the outer surface of the adapter, so that the superconducting cable is connected.
2. A superconducting cable connection method based on YBCO superconducting material according to claim 1, characterized in that said fastening ring (15) is made of elastic material.
3. A superconducting cable connection method based on YBCO superconducting material according to claim 1, wherein in step 2, the hollow copper tube (17) is a compression copper tube to connect the core wires (1) to each other.
4. A superconducting cable connecting method according to claim 1, wherein in step 6, the blade seal is performed by using a copper ring outside the connection between the cryogenic pipe for connection and the cryogenic pipe at the end of the superconducting cable at both ends.
5. A superconducting cable connecting method according to claim 1, wherein in step 6, the connection surface between said cryogenic pipe for connection and the cryogenic pipe at the end of the superconducting cable at both ends is an inclined surface.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910533175.1A CN110265845B (en) | 2019-06-19 | 2019-06-19 | Superconducting cable connection method based on YBCO superconducting material |
| PCT/CN2019/119147 WO2020253085A1 (en) | 2019-06-19 | 2019-11-18 | Connection method for ybco superconducting material-based superconducting cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910533175.1A CN110265845B (en) | 2019-06-19 | 2019-06-19 | Superconducting cable connection method based on YBCO superconducting material |
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| CN110265845A CN110265845A (en) | 2019-09-20 |
| CN110265845B true CN110265845B (en) | 2020-07-14 |
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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 |
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| US6159905A (en) * | 1999-06-02 | 2000-12-12 | Buzcek; David M. | Methods for joining high temperature superconducting components with negligible critical current degradation and articles of manufacture in accordance therewith |
| JP2003077584A (en) * | 2001-09-06 | 2003-03-14 | Yukita Electric Wire Co Ltd | Waterproof connector |
| US20120091144A1 (en) * | 2010-03-08 | 2012-04-19 | Rolf Gerald Baumgartner | Flexible cryostat |
| CN105048237B (en) * | 2015-08-20 | 2018-04-10 | 西北有色金属研究院 | A kind of MgB2The connection method of superconducting wire |
| CN108321556B (en) * | 2017-12-11 | 2020-01-31 | 北京交通大学 | Welding device for superconducting cable joint |
| CN108711819A (en) * | 2018-07-20 | 2018-10-26 | 深圳市沃尔核材股份有限公司 | Cable intermediate joint and its installation method |
| CN109286083A (en) * | 2018-09-28 | 2019-01-29 | 乐清市华仪电缆附件有限公司 | A kind of three-core cable welded joint and its mounting process |
| CN109494011A (en) * | 2018-12-27 | 2019-03-19 | 上海胜华电气股份有限公司 | A kind of low cost hyperconductive 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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- 2019-11-18 WO PCT/CN2019/119147 patent/WO2020253085A1/en active Application Filing
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| CN110265845A (en) | 2019-09-20 |
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