CN-122017699-A - High-temperature superconducting tape performance test method and device capable of realizing rapid sample change

CN122017699ACN 122017699 ACN122017699 ACN 122017699ACN-122017699-A

Abstract

The invention discloses a high-temperature superconductive tape performance test method capable of realizing rapid sample change, which comprises the following steps of S1, placing a first sample rod above a transition cabin, vacuumizing the space inside a Dewar and above the transition cabin, S2, stretching the sample rod into a cold screen, tightly connecting a sample groove cold guide column with a copper base, tightly contacting a sample rod conducting pin with a current lead, S3, starting a refrigerator to cool the inside of the whole device, S4, taking out the sample rod after the performance test of a sample to be tested is completed, S5, placing the next sample rod above the transition cabin, vacuumizing the space above the transition cabin, stretching the sample rod into the cold screen, tightly connecting the sample groove cold guide column with the copper base, tightly contacting the sample rod conducting pin with the current lead, completing rapid sample change, S6, taking out the sample rod after the performance test of the sample to be tested is completed, and repeating S7, and S5-S6. The invention realizes the comprehensive improvement of the test efficiency, the operation convenience and the test accuracy.

Inventors

WANG RONG
WANG GUICAI
WANG DAYOU
LI YULUN
JIA QINGGONG
YAN GUO

Assignees

西安聚能医工科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260331

Claims (10)

1. A high-temperature superconducting tape performance test method capable of realizing rapid sample change is characterized by comprising the following steps: S1, placing a first sample rod filled with a sample to be tested above a transition cabin, and vacuumizing the space inside the Dewar and above the transition cabin; S2, extending the sample rod into the cold screen to enable the sample groove cold guide column to be tightly connected with the copper base, and enabling the sample rod conductive pin to be tightly contacted with the current lead; S3, starting the refrigerator to cool the interior of the whole device, and keeping the temperature unchanged after the temperature is reduced to the working temperature; S4, performing voltage and current test, temperature test, magnetic field intensity test and magnetic field angle test on the sample to be tested, after performance test is completed, lifting the sample rod to the position above the transition cabin, and taking out the sample rod after closing the valve; S5, placing the next sample rod above the transition cabin, vacuumizing the space above the transition cabin, extending the sample rod into the cold screen, tightly connecting the sample groove cold guide column with the copper base, tightly contacting the sample rod conductive pins with the current lead, and completing quick sample change; S6, performing performance test on the sample to be tested, lifting the sample rod to the position above the transition cabin after the performance test is completed, and taking out the sample rod after closing the valve; S7, repeating the steps S5-S6, and completing quick sample changing and performance testing of a plurality of samples.
2. The method for testing the performance of the high-temperature superconducting tape capable of realizing rapid sample change according to claim 1, wherein the specific steps of S1 are as follows: s101, closing a vacuum valve of a transition cabin, extending a sample rod filled with a sample to be tested into a space above the transition cabin, sealing a cover plate flange of the sample rod and the flange of the transition cabin, and screwing up a knurled nut to form a closed space above the transition cabin; S102, opening an inflation valve and an exhaust valve below the transition cabin to vacuumize the interior of the Dewar, and simultaneously opening the inflation valve and the exhaust valve above the transition cabin to vacuumize the space above the transition cabin.
3. The method for testing the performance of the high-temperature superconducting tape capable of realizing rapid sample change according to claim 1, wherein the specific steps of S2 are as follows: S201, opening a transition cabin vacuum valve, loosening a knurled nut of a sample rod, extending the sample rod into a cold screen, and enabling a sample groove cold guide column to be inserted into a groove of a copper base until the sample groove cold guide column cannot move downwards; s202, rotating the sample rod until the sample rod cannot rotate, enabling the conductive pin of the sample rod to be in close contact with the groove structure of the current lead, and finally screwing the knurled nut to fix the sample rod.
4. The method for testing the performance of the high-temperature superconducting tape capable of realizing rapid sample change according to claim 1, wherein in the step S3, the refrigerator is used for carrying out stage refrigeration through two stages of cold heads, the first stage of cold head is used for conducting cold energy for a cold screen to isolate external heat radiation, and the second stage of cold head is used for conducting cold energy for a copper base, so that the sample of the high-temperature superconducting tape is uniformly cooled.
5. The high-temperature superconducting tape performance testing device capable of realizing rapid sample changing is characterized by comprising a sample rod, a transition cabin, a refrigerator, a current lead, a copper base, a dewar, a cold screen and a high-temperature superconducting coil, wherein the dewar is a main testing cavity, a low-temperature vacuum testing environment is formed inside the main testing cavity, the transition cabin is communicated with the dewar, the cold screen, the copper base and the current lead are all arranged inside the dewar, the current lead penetrates through a cold screen upper plate and is connected with the dewar upper plate, the copper base is connected with the cold screen upper plate, the refrigerator is connected with the cold screen and the copper base to realize graded refrigeration, the high-temperature superconducting coil is arranged outside the cold screen, and the sample rod filled with a sample of the high-temperature superconducting tape extends into the dewar through the transition cabin and is matched with the copper base in a positioning mode and is matched with the current lead in a conducting mode, so that performance testing is completed.
6. The device for testing the performance of the high-temperature superconducting tape capable of realizing quick sample exchange according to claim 5, wherein the sample rod is of a hollow structure, an aviation plug is arranged at the top of the sample rod, a knurled nut, a cover plate flange and a sample rotating rod are sequentially arranged on the rod body from top to bottom, a sample rod conductive pin and a sample groove conductive cold column are arranged at the lower end of the rod body, the aviation plug is connected with a voltage lead, and the voltage lead penetrates through the hollow interior of the sample rod and is connected with two ends of the sample rotating rod.
7. The device for testing the performance of the high-temperature superconducting tape capable of realizing rapid sample change according to claim 5, wherein the hard superconducting tape is attached to the conductive pins of the sample rod and the conductive posts of the current lead, and the conductive pins of the sample rod are in dislocation design.
8. The device for testing the performance of the high-temperature superconducting tape capable of realizing rapid sample change according to claim 6, wherein the sample tank cold guide column is provided with a Hall sensor and a thermometer.
9. The device for testing the performance of the high-temperature superconducting tape capable of realizing rapid sample change according to claim 5, wherein the refrigerator is of a hierarchical refrigeration structure with two stages of cold heads, one stage of cold heads is connected with an upper end plate of a cold screen, and the other stage of cold heads is connected with a copper base.
10. The device for testing the performance of the high-temperature superconducting tape capable of realizing rapid sample change according to claim 5, wherein the copper base comprises a bottom disc-shaped structure, a cylindrical boss with a groove is arranged in the center of the disc-shaped structure, and an insulating layer is arranged on the surface of the cylindrical boss.

Description

High-temperature superconducting tape performance test method and device capable of realizing rapid sample change Technical Field The application belongs to the technical field of superconducting material testing, and particularly relates to a high-temperature superconducting tape performance testing method and device capable of realizing quick sample changing. Background The Superconducting (HTS) tape, particularly the second generation REBCO tape, has a great application prospect in the fields of sustainable energy (wind turbines), electric power infrastructure (transformers), medical equipment (nuclear magnetic resonance), and major science facilities (particle accelerators, nuclear fusion devices) due to its excellent current carrying capability at high fields. The properties of the material, in particular the critical current density, are strongly dependent on temperature, magnetic field direction. Therefore, the strip is accurately characterized under multiple physical fields (low temperature, strong magnetic field and variable angle) simulating actual working conditions, and is a key link of material research and development, quality control and device design. Ic of superconducting wire is temperature (T), magnetic field strength (H) and magnetic field angle [ ]) Is defined by the three-dimensional function (Ic (T, H,). Only one or both of which are measured, cannot fully present the performance boundaries of the material. Especially for commercial second-generation YBCO coating conductors, the angle dependence difference of samples of different manufacturers and different batches is obvious, the full angle measurement can provide complete 'portrait' of product performance for the manufacturers, and uniform and comprehensive judgment basis is provided for the selection and comparison of different brands of wires. At present, although the high-performance high-temperature superconducting testing device on the market can realize more accurate measurement, the device has obvious technical bottleneck in a sample replacement link, so that the testing efficiency is seriously limited, and the device is particularly used in an application scene of researching the performance of a large number of sample tests on superconducting tapes. The disadvantages of the prior art are mainly manifested in the following aspects: The sample changing process is cumbersome and takes a very long time, and each time the sample is changed, the whole probe or Dewar needs to be taken out of the magnet and returned to room temperature from a low temperature (such as 4.2K or 77K). Subsequently, it is necessary to open a complicated sealing structure, manually detach the old sample and install the new sample. The process usually requires a plurality of hours, and the subsequent process also requires a long Du Wachou vacuum and re-cooling process, and the total single consumption of Du Wachou vacuum and cooling is usually 1-2 days, so that the whole test process is very long, and the effective utilization rate of equipment is extremely low. Complicated operation and high requirement on personnel, and complicated sample changing operation is required to be completed by expertise, so that not only is the labor cost increased, but also the technology is difficult to popularize in scenes such as industrial quality inspection and the like which need quick and standardized operation. Destroying the low temperature environment and increasing the running cost, the repeated heating and cooling cycles consume a great amount of low temperature liquid (such as liquid helium or liquid nitrogen), and greatly increase the economic cost and the time cost of the test. Disclosure of Invention The invention aims to provide a high-temperature superconductive tape performance test method and device capable of realizing quick sample change, according to the invention, through multi-dimensional structure innovation and technical optimization, comprehensive improvement of test efficiency, operation convenience and test accuracy is realized. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a high-temperature superconducting tape performance test method capable of realizing rapid sample change comprises the following steps: S1, placing a first sample rod filled with a sample to be tested above a transition cabin, and vacuumizing the space inside the Dewar and above the transition cabin; S2, extending the sample rod into the cold screen to enable the sample groove cold guide column to be tightly connected with the copper base, and enabling the sample rod conductive pin to be tightly contacted with the current lead; S3, starting the refrigerator to cool the interior of the whole device, and keeping the temperature unchanged after the temperature is reduced to the working temperature; S4, performing voltage and current test, temperature test, magnetic field intensity test and magnetic field angle test on the sam