CN116580993A - Thermal control type superconducting switch and manufacturing method thereof - Google Patents
Thermal control type superconducting switch and manufacturing method thereof Download PDFInfo
- Publication number
- CN116580993A CN116580993A CN202310411552.0A CN202310411552A CN116580993A CN 116580993 A CN116580993 A CN 116580993A CN 202310411552 A CN202310411552 A CN 202310411552A CN 116580993 A CN116580993 A CN 116580993A
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- China
- Prior art keywords
- metal sheet
- heating
- superconducting
- heat
- superconducting tape
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 104
- 239000002184 metal Substances 0.000 claims abstract description 78
- 229910052751 metal Inorganic materials 0.000 claims abstract description 78
- 238000004321 preservation Methods 0.000 claims abstract description 36
- 239000000523 sample Substances 0.000 claims description 17
- 239000006260 foam Substances 0.000 claims description 12
- 239000004519 grease Substances 0.000 claims description 10
- 229920001296 polysiloxane Polymers 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000004804 winding Methods 0.000 abstract description 2
- 239000002937 thermal insulation foam Substances 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
-
- 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 application provides a thermal control type superconducting switch and a manufacturing method thereof, relating to the technical field of superconducting switches, and comprising a superconducting strip, a supporting metal sheet, a heating component, a heat preservation cavity and a fastener; the superconducting tape, the supporting metal sheet and the heating component are stacked in sequence, the heating part of the heating component is positioned in the heat preservation cavity, and the fastener is used for fastening and connecting the superconducting tape, the supporting metal sheet and the heating component. The superconducting tape is heated by the supporting metal sheet through heat conduction by winding the heating wire on the heating metal sheet, so that the damage to the superconducting tape caused by heating the superconducting tape directly by the heating assembly is reduced, the heating wire and the superconducting tape are separated by the supporting metal sheet, the damage to the superconducting tape caused by uneven surfaces of the heating wire is reduced, and the service life of the superconducting switch is prolonged. The supporting metal sheet also solves the problem that the deformation of the superconducting tape in the width direction is possibly caused under the action of cold impact in a low-temperature environment.
Description
Technical Field
The application relates to the technical field of superconducting switches, in particular to a thermal control type superconducting switch and a manufacturing method thereof.
Background
The working principle of the thermal control type superconducting constant current switch is that the superconducting tape is quenched by heating, so that the superconducting constant current switch is switched from on to off.
The current chinese patent application publication CN102054623B discloses a thermally controlled superconducting switch comprising a switch frame, a superconducting coil, a heater and a thermal insulation layer. The superconducting switch framework is made of insulating materials with poor heat conduction; the superconducting coil is formed by non-inductive winding of a superconducting wire with high resistivity. The heater comprises toothed stainless steel sheets and polyimide films, superconducting coils and the heater are arranged at intervals, and the heater is adhered to the inner surface and the outer surface of each layer of superconducting coils. The heat insulating layer is located outside the outermost heater.
In the prior art, a heater is directly stuck on a superconducting tape, and the thickness of the superconducting tape is hundreds or even tens of micrometers, so that the temperature change is involved in the transition process from a switch to a switch of a thermal control type superconducting switch, the superconducting tape is directly heated, the damage to the superconducting tape is easily caused, and the service life of the thermal control type superconducting switch is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide a thermal control type superconducting switch and a manufacturing method thereof.
The application provides a thermal control type superconducting switch, which comprises a superconducting tape, a supporting metal sheet, a heating component, a heat preservation cavity and a fastener, wherein the superconducting tape is arranged on the supporting metal sheet; the superconducting tape, the support metal sheet and the heating assembly are stacked in sequence, the heating part of the heating assembly is located in the heat preservation cavity, and the fastener is used for fastening and connecting the superconducting tape, the support metal sheet and the heating assembly.
Preferably, the fastener comprises a heat shrink sleeve sleeved with a stacked superconducting tape, a support metal sheet and a heating assembly.
Preferably, the heating assembly includes a heating metal sheet and a heating wire wound around the heating metal sheet, and the heating wire is in contact with the supporting metal sheet.
Preferably, both ends of the lengths of the heating metal sheet, the supporting metal sheet and the superconducting tape extend out of the heat insulation cavity.
Preferably, the whole width of the heating wire wound on the heating metal sheet is larger than or equal to the width of the superconducting tape; the width of the supporting metal sheet is larger than or equal to the width of the superconducting strip.
Preferably, the thickness of the supporting metal sheet is 100um-200um.
Preferably, a temperature measuring probe is arranged in the heat preservation cavity, and a signal wire of the temperature measuring probe extends out of the heat preservation cavity and is electrically connected with the temperature measuring instrument.
Preferably, the material of the outer wall of the heat preservation cavity comprises heat insulation foam.
Preferably, the working environment of the thermally controlled superconducting switch is a low-temperature environment capable of conducting the superconducting tape.
According to the manufacturing method of the thermal control superconducting switch provided by the application, the manufacturing method comprises the following steps:
s1, manufacturing a heat preservation cavity;
s2, smearing low-temperature heat conduction silicone grease on the superconducting tape, the supporting metal sheet, the heating assembly and the temperature measuring probe, and then sequentially placing the low-temperature heat conduction silicone grease into a heat-shrinkable sleeve and adjusting the low-temperature heat conduction silicone grease to a proper position;
s3, heating the heat-shrinkable sleeve until the heat-shrinkable sleeve completely fastens the superconducting tape, the supporting metal sheet, the heating assembly and the temperature measuring probe;
s4, placing the fastened whole into a heat preservation cavity;
s5, sealing the joint.
Compared with the prior art, the application has the following beneficial effects:
1. according to the application, the heating wire is wound on the heating metal sheet, the superconducting strip is heated by utilizing the supporting metal sheet through heat conduction, so that the damage of the superconducting strip caused by the direct heating of the superconducting strip by the heating component is reduced, the heating wire is separated from the superconducting strip by virtue of the supporting metal sheet, the damage of the uneven surface of the heating wire to the superconducting strip is reduced, and the service life of the superconducting switch is prolonged.
2. According to the application, the problem that the superconducting strip is likely to deform in the width direction under the action of cold impact in a low-temperature environment is solved by the supporting metal sheet, the expansion of the internal superconducting strip can be influenced by deformation caused by heat change in the running process of the switch, and the supporting copper sheet can play a role in helping the superconducting strip to bear transverse uneven pressure.
3. According to the application, the temperature in the heat preservation cavity is monitored in real time through the temperature measuring probe, so that convenience in controlling the working state of the thermal control superconducting switch by a worker is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
fig. 1 is a schematic diagram of the overall structure of a thermally controlled superconducting switch embodying the present application.
The figure shows:
superconducting tape 1 heating wire positive electrode 7
Support sheet metal 2 heat shrink 8
Heating metal sheet 3 heat preservation chamber 9
Temperature measuring probe 10 of heating wire 4
First insulating foam casing 5 signal line 11
Second insulating foam housing 6 heating filament cathode 12
Detailed Description
The present application will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present application, but are not intended to limit the application in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present application.
As shown in fig. 1, a thermally controlled superconducting switch according to the present application includes a superconducting tape 1, a supporting metal sheet 2, a heating element, a heat-retaining chamber 9, and a fastener. The superconducting tape 1, the supporting metal sheet 2 and the heating component are stacked in sequence, the heating part of the heating component is positioned in the heat preservation cavity 9, and the fastener is used for fastening and connecting the superconducting tape 1, the supporting metal sheet 2 and the heating component. The heating part of the heating component heats the superconducting tape 1 in a heat conduction mode through the supporting metal sheet 2, so that the problem that the superconducting tape 1 is easy to break and the operation performance of the heat control type superconducting switch is affected is solved.
Specifically, the superconducting tape 1 has a long strip shape, and both the support metal sheet 2 and the heating element have the same or similar shape as the superconducting tape 1. Wherein, the heating assembly includes a heating metal sheet 3 and a heating wire 4, the heating wire 4 is wound on the heating metal sheet 3, and the heating wire 4 is in contact with the supporting metal sheet 2. It should be noted that: the heating metal sheet 3 has certain structural strength and heat conducting property, the heating metal sheet 3 of the application preferably adopts a copper sheet, the heating wire 4 can be any one of the heating wires 4 meeting the environmental and functional requirements of the application in the prior art, and the heating wire 4 of the application preferably adopts a nichrome wire.
Further, the supporting metal sheet 2 is required to support the superconducting tape 1 while conducting heat generated from the heating portion of the heating assembly to the superconducting tape 1. The supporting metal sheet 2 needs to have a certain structural strength and good heat conducting properties. The support metal sheet 2 is preferably a copper sheet.
The heating wire anode 7 and the heating wire cathode 12 are respectively connected with an external heating power supply, and heat generated by the heating wire 4 is transferred to the superconducting strip 1 through the supporting metal sheet 2, so that the superconducting strip 1 is quenched, and the transition from on to off of the superconducting constant current switch is realized.
Further, the overall width of the heating wire 4 wound around the heating metal sheet 3 is equal to or greater than the width of the superconducting tape 1, so as to reduce the external impact applied to the superconducting tape 1 and prevent the superconducting tape 1 from deforming and bending under the action of force. The supporting metal sheet 2 arranged between the heating wire 4 and the superconducting tape 1 also plays a role in separating the heating wire 4 from the superconducting tape 1, because the deformation generated by heat change during the operation of the thermally controlled superconducting switch can affect the extension of the superconducting tape 1 positioned in the heat preservation cavity 9 because of the uneven surface of the heating wire 4, and the superconducting tape 1 is subjected to uneven transverse pressure, so that the deformation of the superconducting tape 1 in the width direction can be caused under the action of cold impact in a low-temperature environment. Therefore, the width of the support metal sheet 2 is set to be equal to or larger than the width of the superconducting tape 1. The thickness of the supporting metal sheet 2 is 100um-200um. Too thick a supporting metal sheet 2 will affect the longitudinal ductility and too thin will not withstand the effect of the laterally uneven pressure.
Still further, in order to improve the heat transfer efficiency, the surfaces of the superconducting tape 1, the supporting metal sheet 2, the heating metal sheet 3, the heating wire 4 and the temperature measuring probe 10 are uniformly coated with low-temperature heat-conducting silicone grease.
More specifically, the fastener includes a heat-shrinkable sleeve 8, and the heat-shrinkable sleeve 8 is sleeved with the superconducting tape 1, the supporting metal sheet 2, and the heating element stacked in this order. The heat-shrinkable sleeve 8 has the characteristic of heat shrinkage, and meanwhile, the heat-shrinkable sleeve 8 is soft and does not damage the superconducting tape 1. The temperature-measuring probe 10 is arranged in the heat-preserving cavity 9, a signal wire 11 of the temperature-measuring probe 10 extends out of the heat-preserving cavity 9 and is electrically connected with the thermometer, the temperature in the heat-preserving cavity 9 can be read out in real time, and the temperature in the heat-preserving cavity 9 can be controlled to be kept constant by controlling the output power of the heating power supply. It should be noted that the temperature measuring probe 10 may be integrated into the heat shrink 8. The signal wire 11 of the temperature measuring probe 10 extends out of the heat preservation cavity 9 along the length direction of the heat-shrinkable sleeve 8, and the heating wire anode 7 and the heating wire cathode 12 respectively extend out of the heat preservation cavity 9 along the two ends of the length direction of the heat-shrinkable sleeve 8.
The material of the outer wall of the heat preservation chamber 9 comprises heat insulation foam. The application provides a feasible heat preservation cavity 9, which comprises the following embodiments: the heat preservation cavity 9 is formed by combining the first heat insulation foam shell 5 and the second heat insulation foam shell 6, and a heat sink structure is manufactured in the first heat insulation foam shell 5 and the second heat insulation foam shell 6 to store heat, and the heat sink structure is the heat preservation cavity 9. And the joint gap of the first heat-insulating foam shell 5 and the second heat-insulating foam shell 6 is connected in a sealing way by using low-temperature-resistant sealant.
What needs to be further explained is: the two ends of the lengths of the heat shrinkage bush 8, the heating metal sheet 3, the supporting metal sheet 2 and the superconducting tape 1 extend out of the heat preservation cavity 9 from the joint of the first heat insulation foam shell 5 and the second heat insulation foam shell 6, and the joints of the heat shrinkage bush 8, the heating metal sheet 3, the supporting metal sheet 2 and the superconducting tape 1 and the first heat insulation foam shell 5 and the second heat insulation foam shell 6 are all in sealed connection by adopting low-temperature resistant sealant.
Preferably, the length of the two ends of the superconducting tape 1 extending out of the heat preservation cavity 9 is larger than the length of the two ends of the supporting metal sheet 2 extending out of the heat preservation cavity 9, the length of the two ends of the supporting metal sheet 2 extending out of the heat preservation cavity 9 is larger than the length of the two ends of the heating metal sheet 3 extending out of the heat preservation cavity 9, and the length of the two ends of the heating metal sheet 3 extending out of the heat preservation cavity 9 is larger than the length of the two ends of the heat shrinkage sleeve 8 extending out of the heat preservation cavity 9.
The working environment of the thermally controlled superconducting switch is a low temperature environment in which the superconducting tape 1 can be conducted. The prior art typically places thermally controlled superconducting switches in a liquid nitrogen environment. When the thermal control type superconducting switch is required to be turned on, only the heating source is required to be turned off, and as the heat shrinkage sleeve 8, the heating metal sheet 3, the supporting metal sheet 2 and the superconducting tape 1 extend out of the heat preservation cavity 9, the heat shrinkage sleeve 8, the heating metal sheet 3, the supporting metal sheet 2 and the superconducting tape 1 have certain heat conduction capacity, the temperature of the superconducting tape 1 positioned in the heat preservation cavity 9 is reduced to be lower than the critical temperature of the superconducting tape 1 by means of the low-temperature environment of the thermal control type superconducting switch, and the thermal control type superconducting switch is turned on.
The application also provides a manufacturing method of the thermal control type superconducting switch, which is used for manufacturing the thermal control type superconducting switch and comprises the following steps:
s1, manufacturing a heat preservation cavity 9. Specifically, two pieces of heat-insulating foam with moderate size are cut out as a first heat-insulating foam shell 5 and a second heat-insulating foam shell 6, a groove with moderate size and depth is respectively formed in the center of the first heat-insulating foam shell 5 and the center of the second heat-insulating foam shell 6, and then a proper amount of heat-insulating glue is poured into the groove to level the heat-insulating foam shells, and the heat-insulating foam shells are dried thoroughly.
S2, smearing low-temperature heat conduction silicone grease on the superconducting tape 1, the supporting metal sheet 2, the heating assembly and the temperature measuring probe 10, and then sequentially placing the low-temperature heat conduction silicone grease into the heat-shrinkable sleeve 8 and adjusting the low-temperature heat conduction silicone grease to a proper position.
And S3, heating the heat-shrinkable sleeve 8 until the heat-shrinkable sleeve 8 completely fastens the superconducting tape 1, the supporting metal sheet 2, the heating assembly and the temperature measuring probe 10. Specifically, a heat gun may be used for heating the heat shrinkable sleeve 8.
S4, placing the fastened whole into the heat preservation cavity 9.
S5, sealing the joint.
In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The foregoing describes specific embodiments of the present application. It is to be understood that the application is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the application. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.
Claims (10)
1. The thermal control type superconducting switch is characterized by comprising a superconducting strip (1), a supporting metal sheet (2), a heating component, a heat preservation cavity (9) and a fastener;
the superconducting tape (1), the support metal sheet (2) and the heating assembly are stacked in sequence, the heating part of the heating assembly is located in the heat preservation cavity (9), and the fastener is used for fastening and connecting the superconducting tape (1), the support metal sheet (2) and the heating assembly.
2. A thermally controlled superconducting switch according to claim 1, wherein the fastener comprises a heat shrink (8), the heat shrink (8) encasing the superconducting tape (1), the support metal sheet (2) and the heating assembly stacked in sequence.
3. A thermally controlled superconducting switch according to claim 1, wherein the heating assembly comprises a heating metal sheet (3) and a heating wire (4), the heating wire (4) being wound around the heating metal sheet (3), and the heating wire (4) being in contact with the supporting metal sheet (2).
4. A thermally controlled superconducting switch according to claim 3, wherein the heating metal sheet (3), the supporting metal sheet (2) and the superconducting tape (1) extend from the insulating cavity (9) at both ends of their length.
5. A thermally controlled superconducting switch according to claim 3, wherein the overall width of the heating wire (4) wound around the heating metal sheet (3) is equal to or greater than the width of the superconducting tape (1);
the width of the supporting metal sheet (2) is larger than or equal to the width of the superconducting strip (1).
6. A thermally controlled superconducting switch according to claim 1, wherein the supporting metal sheet (2) has a thickness of 100um-200um.
7. The thermally controlled superconducting switch according to claim 1, wherein a temperature measuring probe (10) is arranged in the heat preservation cavity (9), and a signal wire (11) of the temperature measuring probe (10) extends out of the heat preservation cavity (9) and is electrically connected with the thermometer.
8. A thermally controlled superconducting switch according to claim 1, wherein the material of the outer wall of the insulating chamber (9) comprises insulating foam.
9. A thermally controlled superconducting switch according to claim 1, wherein the operating environment of the thermally controlled superconducting switch is a low temperature environment in which the superconducting tape (1) is rendered conductive.
10. A method for manufacturing a thermally controlled superconducting switch according to any one of claims 1 to 9, comprising the steps of:
s1, manufacturing a heat preservation cavity (9);
s2, smearing low-temperature heat conduction silicone grease on the superconducting tape (1), the supporting metal sheet (2), the heating assembly and the temperature measuring probe (10), and then sequentially placing the low-temperature heat conduction silicone grease into the heat-shrinkable sleeve (8) and adjusting the low-temperature heat conduction silicone grease to a proper position;
s3, heating the heat-shrinkable sleeve (8) until the heat-shrinkable sleeve (8) completely fastens the superconducting tape (1), the supporting metal sheet (2), the heating assembly and the temperature measuring probe (10);
s4, placing the fastened whole into a heat preservation cavity (9);
s5, sealing the joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310411552.0A CN116580993A (en) | 2023-04-17 | 2023-04-17 | Thermal control type superconducting switch and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310411552.0A CN116580993A (en) | 2023-04-17 | 2023-04-17 | Thermal control type superconducting switch and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116580993A true CN116580993A (en) | 2023-08-11 |
Family
ID=87534937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310411552.0A Pending CN116580993A (en) | 2023-04-17 | 2023-04-17 | Thermal control type superconducting switch and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116580993A (en) |
-
2023
- 2023-04-17 CN CN202310411552.0A patent/CN116580993A/en active Pending
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