CN110297197B - Superconducting device low temperature testing arrangement - Google Patents
Superconducting device low temperature testing arrangement Download PDFInfo
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- CN110297197B CN110297197B CN201910599257.6A CN201910599257A CN110297197B CN 110297197 B CN110297197 B CN 110297197B CN 201910599257 A CN201910599257 A CN 201910599257A CN 110297197 B CN110297197 B CN 110297197B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1238—Measuring superconductive properties
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Abstract
According to the low-temperature testing device for the superconducting device, the small holes are formed in the side face of the connecting rod inserted into the liquid helium Dewar, the helium gas outlet is formed in the upper end of the connecting rod, cold helium gas in the Dewar can be discharged out of the Dewar through the inside of the connecting rod, and the cable can be cooled by fully utilizing sensible heat of the cold helium gas by combining the arrangement of the cable partition plate in the connecting rod, so that heat conduction and leakage of the cable are isolated, and efficient heat insulation of the testing device is realized.
Description
Technical Field
The invention relates to the field of low-temperature testing devices, in particular to a low-temperature testing device for a superconducting device.
Background
In the process of developing superconducting electronic components, high-frequency performance tests are required, main tests are carried out at low temperature, for example, superconducting chips are required to carry out related performance tests in a low-temperature environment of 4.2K, a low-temperature testing device of a superconducting device is a device for connecting the superconducting device at low temperature with normal-temperature measuring equipment, and the testing device mainly comprises three parts, namely a joint mounting box, a connecting rod and a device mounting seat. One end of the device mounting seat is inserted into the liquid helium Dewar to enable the superconducting device to be in a 4.2K low-temperature environment, the joint mounting box at the other end of the testing device is in a normal-temperature environment, a signal line and a power line required by testing penetrate through the hollow connecting rod, one end of the device mounting seat is connected with the 4.2K device mounting seat, the other end of the device mounting seat is connected with a joint on the joint mounting box at the normal-temperature end, and therefore performance testing of the superconducting chip is achieved. The number of cables required by the superconducting device test is dozens of cables, more cables are hundreds of cables, even hundreds of cables, so that the heat leakage of the lead is very large, a large amount of liquid helium is consumed, liquid helium needs to be frequently filled in the test process, the test economy is poor, and the test efficiency is seriously influenced.
Chinese patent CN206223828U introduces a low temperature test probe rod, which is mainly used to solve the problem of low accuracy of ultra-low frequency parameter measurement of superconducting devices, and the test lead directly passes through the probe rod without any arrangement, so that a large number of leads are directly connected with the liquid helium temperature zone and the normal temperature zone, and therefore the conduction heat leakage of the lead is very large, and the consumption of liquid helium is increased.
Disclosure of Invention
Therefore, it is necessary to provide a superconducting device low-temperature testing apparatus with high efficiency, thermal insulation and high testing efficiency to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a superconducting device low temperature testing apparatus comprising: the device comprises a connector mounting box, a connecting rod and a device mounting seat, wherein a test cable penetrates through the connecting rod, two ends of the test cable are respectively connected with the connector mounting box and the device mounting seat, a superconducting device to be detected is arranged on the device mounting seat, the connector mounting box is connected with a normal-temperature detection device, a part, inserted into a liquid helium dewar, of the connecting rod and a part, not inserted into the dewar, of the connecting rod are respectively provided with an air inlet small hole and a helium outlet, when the superconducting device to be detected is detected, the superconducting device to be detected is immersed into liquid helium, cold helium gas enters the connecting rod through the air inlet small hole, flows upwards in a pipe to cool the test cable and is discharged through the helium outlet.
In some preferred embodiments, a plurality of cable partitions are arranged inside the connecting rod from bottom to top for uniformly partitioning the test cables.
In some preferred embodiments, the cross section of any cable partition is circular, a plurality of small holes are formed in the cross section, the test cable passes through the small holes, a notch is formed in the circumference of any cable partition, and the notch and a helium gas channel formed by the inner hole wall of the connecting rod are arranged at an angle of 180 degrees.
In some preferred embodiments, the openings of the gaps of adjacent cable separators are in opposite directions.
In some preferred embodiments, the cable partition plate includes a first cable partition plate and a second cable partition plate, the first cable partition plate and the second cable partition plate are sequentially arranged at intervals, the cross section of the first cable partition plate is circular, a center hole is formed in the center of the first cable partition plate, a plurality of small holes are formed around the center hole, a plurality of small holes are formed in the second cable partition plate, a plurality of excircle notches are formed in the edge of the small holes at intervals, the test cable penetrates through the small holes in the first cable partition plate and the second cable partition plate, the helium gas flows upwards through the center hole of the first cable partition plate, and when entering the second cable partition plate, the helium gas flows upwards continuously through the excircle notches of the second cable partition plate and a channel formed by the inner hole of the connecting rod and circulates sequentially.
In some preferred embodiments, the second cable separator plate is provided with 3 cylindrical gaps at intervals on the edge.
The invention adopts the technical scheme that the method has the advantages that:
the invention provides a low-temperature testing device for a superconducting device, which comprises: the low-temperature testing device comprises a connector mounting box, a connecting rod and a device mounting seat, wherein a testing cable penetrates through the connecting rod, two ends of the testing cable are respectively connected with the connector mounting box and the device mounting seat, a superconducting device to be detected is arranged on the device mounting seat, the connector mounting box is connected with a normal-temperature detection device, a part, inserted into a liquid helium dewar, of the connecting rod and a part, not inserted into the dewar, of the connecting rod are respectively provided with an air inlet small hole and a helium gas outlet, when the superconducting device to be detected is detected, the superconducting device to be detected is immersed into liquid helium, cold helium gas enters the connecting rod through the air inlet small hole, flows upwards in a pipe to cool the testing cable and is discharged through the helium gas outlet, and the low-temperature testing device for the superconducting device provided by the invention is characterized in that the low-temperature testing device for the superconducting device is formed by arranging a small hole on the side surface of the connecting rod inserted into the liquid helium dewar and arranging the helium gas outlet at the upper end of the connecting rod, can pass through the inside discharge dewar of connecting rod with the inside cold helium of dewar outside, combine the setting of the inside cable baffle of connecting rod, the sensible heat that can make full use of cold helium cools off the cable, and then the conduction of isolated cable leaks heat, realizes testing arrangement's high-efficient adiabatic.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a superconducting device low-temperature testing apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic view of a flow channel of a superconducting device low-temperature testing apparatus according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a cable separator according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a cross arrangement structure of the same cable partitions according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a cross arrangement structure of two cable partitions according to 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.
Referring to fig. 1 and fig. 2, a schematic structural diagram of a superconducting device low-temperature testing apparatus and a schematic flow channel diagram of the superconducting device low-temperature testing apparatus according to an embodiment of the present invention are shown, and for convenience of description, only portions related to the embodiment of the present invention are shown, and detailed descriptions are provided below.
The invention provides a low-temperature testing device 100 for a superconducting device, which comprises: the superconducting device detection device comprises a connector mounting box 1, a connecting rod 2 and a device mounting seat 3, wherein a test cable penetrates through the connecting rod 1, two ends of the test cable are respectively connected with the connector mounting box 1 and the device mounting seat 3, a superconducting device to be detected is arranged on the device mounting seat 3, the connector mounting box 1 is connected with a normal temperature detection device, a part, inserted into a liquid helium dewar 6, of the connecting rod 2 and a part, not inserted into the dewar, of the connecting rod are respectively provided with an air inlet small hole 5 and a helium gas outlet 4, when the superconducting device to be detected is detected, the superconducting device to be detected is immersed into liquid helium, cold helium gas enters the connecting rod 2 through the air inlet small hole 5, flows upwards in a pipe to cool the test cable, and is discharged through the helium gas outlet 4.
In some preferred embodiments, a plurality of cable partitions are arranged inside the connecting rod 2 from bottom to top to uniformly partition the test cables.
Fig. 3 and fig. 4 are schematic views of a cable partition board according to an embodiment of the present invention and a cross arrangement structure of the same cable partition board.
In this embodiment, the cross section of any cable partition 7 is circular, a plurality of small holes are formed in the cross section, the test cable 10 passes through the small holes, a notch 71 is formed in the circumference of any cable partition 7, and the notch 71 and a helium gas channel formed by the inner hole wall of the connecting rod 2 are arranged at an angle of 180 °.
In some preferred embodiments, the openings 71 of adjacent cable separators 7 are open in opposite directions.
It can be understood that all the test cables 10 are uniformly separated by the cable partition plate 7, and the gaps on the cable partition plate 7 and the helium gas channel formed on the inner hole wall of the connecting rod are arranged at 180 degrees, so that the cables can be sufficiently cooled.
Please refer to fig. 3 and fig. 5, which are schematic structural diagrams of a cable partition and a cross arrangement structure of two cable partitions according to an embodiment of the present invention.
In this embodiment, the cable partition board includes a first cable partition board 8 and a second cable partition board 9, the first cable partition board 8 and the second cable partition board 9 are sequentially arranged at intervals, the cross section of the first cable partition board 8 is circular, a center hole 81 is formed in the center of the first cable partition board 8, a plurality of small holes are formed around the center hole 81, a plurality of small holes are formed in the second cable partition board 9, a plurality of excircle notches 91 are formed at intervals at the edge of the small holes, the test cable 10 passes through the small holes in the first cable partition board 8 and the second cable partition board 9, helium gas flows upwards through the center hole 81 of the first cable partition board 8, and when entering the second cable partition board 9, the helium gas continues to flow upwards through a channel formed by the excircle notches 91 of the second cable partition board 9 and the inner hole of the connecting rod 2, and flows upwards through the center hole 81 again when the next cable partition board 8 flows upwards, so alternating, sufficient cooling of the test cable 10 is achieved.
In some preferred embodiments, the second cable baffle 9 is provided with 3 outer circular gaps 91 at intervals.
It can be understood that above two kinds of structures and arrangement form, because the cooling cable that can be abundant in the helium upflow process utilizes the sensible heat of helium to offset the conduction heat leak of cable, consequently has high-efficient adiabatic effect, reduces the liquid helium of liquid helium dewar and fills and fill, and then improves testing arrangement's test efficiency.
According to the low-temperature testing device for the superconducting device, the small holes are formed in the side face of the connecting rod inserted into the liquid helium Dewar, the helium gas outlet is formed in the upper end of the connecting rod, cold helium gas in the Dewar can be discharged out of the Dewar through the inside of the connecting rod, and the cable can be cooled by fully utilizing sensible heat of the cold helium gas by combining the arrangement of the cable partition plate in the connecting rod, so that heat conduction and leakage of the cable are isolated, and efficient heat insulation of the testing device is realized.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
Of course, the superconducting device low-temperature testing apparatus of the present invention may have various changes and modifications, and is not limited to the specific structure of the above-described embodiments. In conclusion, the scope of the present invention should include those changes or substitutions and modifications which are obvious to those of ordinary skill in the art.
Claims (1)
1. A superconducting device low temperature test apparatus, comprising: the superconducting device detection device comprises a connector mounting box, a connecting rod and a device mounting seat, wherein a test cable penetrates through the connecting rod, two ends of the test cable are respectively connected with the connector mounting box and the device mounting seat, a superconducting device to be detected is arranged on the device mounting seat, the connector mounting box is connected with a normal-temperature detection device, a part, inserted into a liquid helium dewar, of the connecting rod and a part, not inserted into the dewar, of the connecting rod are respectively provided with an air inlet small hole and a helium gas outlet, when the superconducting device to be detected is detected, the superconducting device to be detected is immersed into liquid helium, cold helium gas enters the connecting rod through the air inlet small hole, flows upwards in a pipe to cool the test cable and is exhausted through the helium gas outlet;
a plurality of cable clapboards which enable the test cables to be uniformly separated are arranged in the connecting rod from bottom to top; the section of any cable separator is circular, a plurality of small holes are formed in the section, the test cable penetrates through the small holes, a notch is formed in the circumference of any cable separator, and the notch and a helium channel formed by the inner hole wall of the connecting rod are arranged in an angle of 180 degrees;
the cable partition plate comprises a first cable partition plate and a second cable partition plate, the first cable partition plate and the second cable partition plate are sequentially arranged at intervals, the cross section of the first cable partition plate is circular, a center hole is formed in the center of the first cable partition plate, a plurality of small holes are formed around the center hole, a plurality of small holes are formed in the second cable partition plate, a plurality of excircle notches are formed in the edge of the second cable partition plate at intervals, the test cable penetrates through the small holes in the first cable partition plate and the second cable partition plate, helium flows upwards through the center hole of the first cable partition plate, and when entering the second cable partition plate, the helium continuously flows upwards through a channel formed by the excircle notches of the second cable partition plate and the inner hole of the connecting rod, and the cycle is performed sequentially; and 3 excircle openings are arranged at the edge of the second cable separator at intervals.
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| CN201910599257.6A CN110297197B (en) | 2019-07-04 | 2019-07-04 | Superconducting device low temperature testing arrangement |
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| CN201910599257.6A CN110297197B (en) | 2019-07-04 | 2019-07-04 | Superconducting device low temperature testing arrangement |
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| CN110297197B true CN110297197B (en) | 2022-03-18 |
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| CN113340377B (en) * | 2020-03-02 | 2022-10-11 | 中国科学院理化技术研究所 | Superconducting liquid level meter for measuring liquid helium level |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094502A (en) * | 1992-11-30 | 1994-11-02 | 瑞典通用电器勃朗勃威力公司 | The air cooling sleeve pipe of using as superconducting applications in the cryostat, |
| CN103219124A (en) * | 2013-04-26 | 2013-07-24 | 宁波健信机械有限公司 | High-temperature superconducting current lead with section capable of being pulled out and using externally supplied liquid nitrogen to cool |
| CN104332248A (en) * | 2014-09-29 | 2015-02-04 | 中国科学院电工研究所 | Air cooled current lead wire used for superconducting power equipment |
| CN109273191A (en) * | 2018-09-26 | 2019-01-25 | 中国科学院合肥物质科学研究院 | A kind of helium gas cooling type high-temperature superconductor component for high current high-temperature superconductive lead wire |
| CN109870486A (en) * | 2019-03-21 | 2019-06-11 | 中国地震局地震研究所 | The experimental provision of suiperconducting transition occurs for a kind of observation superconductor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10401393B2 (en) * | 2016-06-28 | 2019-09-03 | The United States Of America As Represented By The Secretary Of The Army | Method for determining persistent critical current of superconducting materials |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094502A (en) * | 1992-11-30 | 1994-11-02 | 瑞典通用电器勃朗勃威力公司 | The air cooling sleeve pipe of using as superconducting applications in the cryostat, |
| CN103219124A (en) * | 2013-04-26 | 2013-07-24 | 宁波健信机械有限公司 | High-temperature superconducting current lead with section capable of being pulled out and using externally supplied liquid nitrogen to cool |
| CN104332248A (en) * | 2014-09-29 | 2015-02-04 | 中国科学院电工研究所 | Air cooled current lead wire used for superconducting power equipment |
| CN109273191A (en) * | 2018-09-26 | 2019-01-25 | 中国科学院合肥物质科学研究院 | A kind of helium gas cooling type high-temperature superconductor component for high current high-temperature superconductive lead wire |
| CN109870486A (en) * | 2019-03-21 | 2019-06-11 | 中国地震局地震研究所 | The experimental provision of suiperconducting transition occurs for a kind of observation superconductor |
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