CN115468864A - Device and method for testing bending characteristic of high-temperature superconducting tape - Google Patents

Abstract

The invention discloses a high-temperature superconducting strip bending characteristic testing device and a testing method thereof, which relate to the technical field of high-temperature superconducting, and include: a bending platform, the bending platform is composed of circular steps whose diameters are successively reduced from bottom to top to form concentric axes Stacked, the bending table is set on the workbench through the sliding plate; the conductive column is set on the workbench, the conductive column is provided on both sides of the bending table, and the conductive column is provided with a sliding joint for sliding connection. The sliding joint is used to connect high temperature The end of the superconducting strip; the sliding plate can slide longitudinally in the direction away from or close to the conductive column; the sliding joint can slide vertically and laterally relative to the conductive column; this scheme can complete the critical current test under different bending radii , through the bending table and sliding joint, it effectively solves the inconvenience of repeated disassembly and installation of the sample when the HTS strip is tested under different diameters, simplifies the test steps, effectively improves the test efficiency, and reduces the disassembly and The risk of specimen damage and rupture caused by installation.

Description

A high-temperature superconducting strip bending characteristic testing device and testing method thereof

technical field

The invention relates to the technical field of high-temperature superconductivity, in particular to a high-temperature superconducting strip bending characteristic testing device and a testing method thereof.

Background technique

Since the advent of high-temperature superconducting materials in 1986, high-temperature superconducting technology has developed rapidly. In particular, the second-generation high-temperature superconducting tape represented by REBCO (operating at 77K in liquid nitrogen) has been widely used in the fields of energy, electric power, medical and military industries due to its excellent current-carrying capacity, high-field performance and mechanical strength. In electrical and strong magnet equipment. In practical applications, the high-temperature superconducting tape will inevitably be bent to prepare the desired cable or magnet, and as a layered ceramic material, it is very easy to delaminate or crack during the bending process, so that the tape The material reduces or loses its current-carrying capacity, thereby affecting the safe operation of related equipment or devices. For this reason, the bending characteristics of high-temperature superconducting strips are regarded as one of the important indicators for evaluating the properties of strips.

Contents of the invention

The object of the present invention is to provide a high-temperature superconducting strip bending characteristic testing device and its testing method. By adopting this scheme, when completing the critical current test under different bending radii, the slidable bending table and the sliding joint can be used to effectively It solves the inconvenience of repeated disassembly and installation of the sample when the high-temperature superconducting strip is tested under different diameters, simplifies the test steps, effectively improves the test efficiency, and reduces the damage and crack of the sample caused by disassembly and installation. risk.

The present invention realizes through following technical scheme:

A high-temperature superconducting strip bending characteristic testing device, comprising:

A bending table, the bending table is formed by stacking circular steps whose diameters decrease successively from bottom to top to form concentric axes, and the bending table is set on the workbench through a sliding plate;

Conductive columns, the conductive columns are arranged on the workbench, conductive columns are provided on both sides of the bending table, and sliding joints for sliding connection are provided on the conductive columns, and the sliding joints are used to connect high-temperature superconducting strip ends;

The sliding plate can slide longitudinally in a direction away from or close to the conductive column; the sliding joint can slide vertically and laterally relative to the conductive column.

The critical transition temperatures of the practical low-temperature superconducting materials NbTi and Nb3Sn are 9.2k and 18.1k, respectively, and usually operate at 4.2k in liquid helium; the critical transition temperature of the first-generation high-temperature superconducting Bi is 108k, while the current second-generation high-temperature The critical temperature of superconducting (RE system) is 90K, and it usually operates in the liquid nitrogen temperature zone of 77K; compared with the prior art, the high-temperature superconducting strip will inevitably be bent during the bending characteristic test, and it is very easy to Delamination or crack damage occurs during the bending process, which reduces or loses the current-carrying capacity of the strip, thereby affecting the safe operation of related equipment or devices. This solution provides a high-temperature superconducting strip bending characteristic testing device. With this scheme, the two ends of the high-temperature superconducting strip and the sliding joint are fixed through the slidable bending table and the sliding joint, and then disassembled until the end of the experiment, thus avoiding the damage of the high-temperature superconducting strip during the repeated disassembly process Risk, the specific plan includes a bending table, and the high-temperature superconducting tape can be tested for bending characteristics by being wound on circular steps of different diameters on the bending table. The bending table is fixed on the workbench, two Conductive pillars are provided on the sides, that is, the left conductive pillar and the right conductive pillar, and there are sliding joints on the conductive pillars, that is, the left sliding joint and the right sliding joint. Set a circular step with a specified radius, and connect the two ends of the high-temperature superconducting strip to the two sliding joints, and then energize the conductive column to start testing the bending characteristics; when the test radius needs to be changed, through the longitudinal Just slide the bending table and move the sliding joint vertically and laterally, so as to avoid disassembling the end of the sample; plane as the base.

Further optimization, the workbench includes an upper support plate and a lower support plate, the upper support plate and the lower support plate are connected by several support screws, and the upper support plate and the lower support plate are parallel to each other; the bending table passes The sliding plate is arranged on the upper supporting plate; it is used to realize the detachable connection of the working table.

Further optimization, the upper supporting plate and the sliding plate are provided with sliding grooves, the sliding grooves are arranged longitudinally, and screws are penetrated through the two sliding grooves; they are used to realize the longitudinal sliding of the bending table.

For further optimization, a positioning plate is also fixed on the upper support plate, and the sides of the positioning plate and the sides of the sliding plate close to the positioning plate are flush with each other and arranged along the sliding direction of the sliding plate; To prevent the slider from shaking left and right when moving back and forth.

Further optimization, along the height direction of the conductive column, the conductive column is provided with a vertical through groove, and the sliding joint is connected with the vertical through groove through a screw; in order to realize the vertical sliding of the sliding joint, it is convenient to adjust the test The samples were tested on circular steps of different diameters.

Further optimization, the sliding joint includes a curved part, the curved part is bent toward the direction of the bending platform, and the curved parts of the two sliding joints are arranged opposite to each other; the length direction of the curved part is the direction of the high temperature superconducting strip Walking direction: the sliding joint moves laterally to drive the outer surface of the bending part pointing to one end of the bending table to be tangent to the circular step with a specified test radius. It is used to enable the sample to go around the bending table greater than or equal to 180°.

Further optimization, the sliding joint also includes a long straight part connected to the curved part, the long straight part has a transverse through groove, the transverse through groove is arranged along the sliding direction perpendicular to the sliding plate, the vertical The screws on the channel pass through said transverse channel; the transverse channel for realizing the sliding joint.

Further optimization, the curved part is bent at 90° relative to the long straight part, and there are several threaded holes on the long straight part, and copper pressing sheets are screwed on the threaded holes, and the copper pressing sheets are used to connect the The end of the high-temperature superconducting strip is pressed on the long straight part; it is used to prevent the joint part of the sample from being interfered by fixing screws and the like.

Further optimization, the conductive column and the sliding joint are both made of red copper; they are made of red copper with good electrical conductivity, which can improve the accuracy of the test.

In further optimization, the conductive columns pass through the upper support plate and the lower support plate in turn, and the conductive columns between the upper support plate and the lower support plate are provided with outwardly extending support plates, between the two support plates The space is used to fix the conductive joint; it is used to realize the electrification.

Further optimization, a test method of a high-temperature superconducting strip bending characteristic test device, the method includes the following steps:

Step 1: The high-temperature superconducting strip is bypassed by the circular step of the maximum diameter of the bending table, and the two ends of the high-temperature superconducting strip are respectively connected to two sliding joints; then the bending table and the sliding joint are adjusted position, so that the high-temperature superconducting strip is just tight, and the bending part is greater than or equal to 180° around the bending table;

Step 2: Solder the voltage leads, and at the same time connect the power line to the conductive sliding joint on the conductive post;

Step 3: Put the assembled test device into a liquid nitrogen environment to cool to a superconducting state, then connect the signal output terminal of the voltage lead to the nanovoltmeter, and turn on the power to start the experiment;

Step 4: After testing the maximum bending diameter, turn off the power and take out the test device, adjust the bending table and sliding joint again, adjust the high-temperature superconducting strip to the second largest bending diameter, and ensure the high-temperature superconducting strip The status is as shown in step 1, and repeat step 3 after completion;

Step 5: Repeat step 4, and test the high-temperature superconducting strips on the circular steps of the bending table in order of bending diameters from large to small, until the smallest diameter test is completed.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

1. The present invention provides a high-temperature superconducting strip bending characteristic testing device and testing method thereof. The testing device adopts a slidable bending table and a slidable joint, and after the two ends of the sample are fixed with the sliding joint, they are disassembled until the end of the experiment , which effectively solves the inconvenience of repeated disassembly and installation of the sample when the high-temperature superconducting strip is tested under different diameters, simplifies the test steps, effectively improves the test efficiency, and reduces the sample damage caused by disassembly and installation risk;

2. The present invention provides a high-temperature superconducting strip bending characteristic testing device and its testing method. The conductive column is provided with a fixed conductive joint, and the conventional method of directly connecting with the joint is not adopted, so that the power line follows the test during the test. The change of test diameter can be moved or disassembled and installed, which further improves the efficiency of the test and the risk of damage to the sample.

3. The present invention provides a high-temperature superconducting strip bending characteristic testing device and its testing method. The device is provided with a positioning plate, which effectively prevents the left and right shaking of the bending table when it moves back and forth with the sliding plate, and further reduces the Risk of strip damage.

4. The present invention provides a high-temperature superconducting strip bending characteristic testing device and testing method thereof. The sliding joint is provided with a 90° curved portion with a certain radius, and the strip is fixed on the long straight portion close to the curved portion, which can realize When testing with a small bending diameter, the joint part will not be interfered by fixing screws, etc., which will affect the test results.

5. The present invention provides a high-temperature superconducting strip bending characteristic testing device and a testing method thereof, which can meet the bending characteristic testing of high-temperature superconducting strips with all bandwidths currently on the market.

6. The present invention provides a high-temperature superconducting strip bending characteristic testing device and its testing method. The device has a simple structure and easy test operation steps, which greatly saves test time and improves the effectiveness and efficiency of the test. .

Description of drawings

In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work. In the attached picture:

Fig. 1 is a schematic structural view of an embodiment provided by the present invention;

Fig. 2 is an experimental data diagram of an embodiment provided by the invention.

Marks and corresponding parts names in the attached drawings:

1-lower support plate, 2-upper support plate, 3-support screw, 4-positioning plate, 5-sliding plate, 6-bending platform, 7-left conductive column, 8-right conductive column, 9-left sliding joint, 10 - Right slide joint.

detailed description

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples and accompanying drawings. As a limitation of the present invention.

Example 1

As shown in Figure 1, the present embodiment 1 provides a high-temperature superconducting strip bending characteristic testing device, including:

Bending table 6, the bending table 6 is formed by stacking circular steps whose diameters decrease successively from bottom to top to form concentric axes, and the bending table 6 is set on the workbench through the sliding plate 5;

Conductive columns, the conductive columns are arranged on the workbench, conductive columns are provided on both sides of the bending table 6, and sliding joints for sliding connection are provided on the conductive columns, and the sliding joints are used to connect high-temperature ultra- strip ends;

The sliding joint includes a curved portion, and the curved portion is bent toward the bending table 6, and the curved portions of the two sliding joints are arranged opposite to each other; the length direction of the curved portion is the running direction of the high-temperature superconducting strip ;

The sliding plate 5 can slide longitudinally in the direction away from or close to the conductive column; the sliding joint can slide vertically and laterally relative to the conductive column; the sliding joint can move laterally to drive the curved part to point to the curved The outer surface of one end of platform 6 is tangent to the circular step with a specified test radius.

Compared with the prior art, the high-temperature superconducting strip will inevitably be bent during the bending characteristic test, and is extremely prone to delamination or crack damage during the bending process, thereby reducing or losing the current-carrying capacity of the strip. As a result, problems such as the safe operation of related equipment or devices are affected. This scheme provides a high-temperature superconducting strip bending characteristic testing device. Using this scheme, through the slidable bending table 6 and the sliding joint, the two high-temperature superconducting strips After the end and the sliding joint are fixed, they are not disassembled until the end of the experiment, thus avoiding the risk of damage to the high-temperature superconducting strip during repeated disassembly. The bending characteristics can be tested on the circular steps of different diameters on the platform 6. The bending platform 6 is fixed on the workbench, and conductive columns are arranged on both sides of the front of the workbench, that is, the left conductive column 7 and the right conductive column. 8. There are sliding joints on the conductive column, that is, the left sliding joint 9 and the right sliding joint 10. In the specific experiment process, the high-temperature superconducting strip is made to bypass the circular steps of the specified radius of the bending table 6, and the high-temperature superconducting The two ends of the strip are respectively connected to the two sliding joints, and then the conductive column is energized to start testing the bending characteristics; when the test radius needs to be changed, slide the bending table 6 vertically and move the sliding joints vertically and laterally , thereby avoiding disassembly of the specimen ends.

Please refer to Fig. 1, as a specific embodiment for realizing the detachable connection of the workbench, the workbench includes an upper support plate 2 and a lower support plate 1, and several The support screw 3 is connected, and the upper support plate 2 and the lower support plate 1 are parallel to each other; the bending table 6 is set on the upper support plate 2 through the sliding plate 5; in this scheme, the workbench includes the upper support plate 2 and the lower support plate The plate 1, the upper support plate 2 and the lower support plate 1 are parallel to each other, and support screws 3 are connected at the four corners, so that the upper and lower support plates are fixed by the support screws 3.

In a further solution, both the upper supporting plate 2 and the sliding plate 5 are provided with sliding grooves, the sliding grooves are arranged vertically, and screws are penetrated through the two sliding grooves; in order to realize the longitudinal sliding of the bending table 6, In this scheme, there are sliding grooves on the upper support plate 2 and the sliding plate 5, preferably on the sliding plates 5 on both sides of the bending table 6, sliding grooves are provided. The tightness can realize the forward and backward movement and fixation of the bending table 6.

As a specific embodiment to prevent the sliding block from shaking left and right when moving back and forth, the upper support plate 2 is also fixed with a positioning plate 4, and the sides of the positioning plate 4 and the sliding plate 5 are close to the positioning plate 4. The sides are flush with each other and set along the sliding direction of the sliding plate 5; Adjacent end surfaces are parallel to each other. During a specific experiment, the sliding plate 5 is tightly attached to the positioning plate 4, so that the sliding plate 5 can slide vertically stably.

In this embodiment, along the height direction of the conductive column, the conductive column is provided with a vertical through groove, and the sliding joint is connected with the vertical through groove through a screw; in order to realize the vertical sliding of the sliding joint, it is convenient to The adjustment sample is tested on circular steps with different diameters. In this scheme, a vertical channel is provided on the conductive column. At this time, the sliding joint is connected to the vertical channel by screws, which can be realized by tightening the screws. The adjustment of the sliding joint in the vertical direction; wherein, the number of vertical through slots is preferably two, which facilitates the stability of the adjustment.

Please continue to refer to FIG. 1 , the sliding joint includes a curved portion, the curved portion is bent toward the direction of the bending table 6, and the curved portions of the two sliding joints are arranged opposite to each other; the length direction of the curved portion is The running direction of the guide strip material; the sliding joint moves laterally to drive the outer surface of the curved part pointing to one end of the bending table 6 to be tangent to the circular step with a specified test radius. Wherein, the sliding joint includes a curved part, and the curved part is bent towards the direction of the bending table 6, and the two sliding joints are arranged symmetrically along the central axis of the bending table 6, and the curved parts are all located between the two sliding joints. In the specific experiment process , the bending part can receive the end of the sample, and the end of the sample can be close to the outer surface of the bending part, and walk along the length path direction of the bending part, and finally connect to the other end of the sliding joint; where the bending part points to the bending table 6. The outer surface of one end needs to be tangent to the circular step with the specified test radius, so that the test effect can be achieved only when the sample can go around the bending platform by 180° or more. The above adjustment can be realized by the lateral movement of the sliding joint.

As a specific embodiment for realizing the transverse channel of the sliding joint, the sliding joint also includes a long straight part connected to the curved part, the long straight part has a transverse channel, and the transverse channel is vertically Set in the sliding direction of the sliding plate 5, the screws on the vertical through groove pass through the horizontal through groove; in this solution, the sliding joint also includes a long straight part, and the length direction of the long straight part is along the horizontal direction of the sliding joint. In the moving direction, the long straight part is provided with a horizontal channel along its length. At this time, the screws pass through the horizontal channel and the vertical channel in turn. The horizontal and vertical movement of the sliding joint can be realized through the tightening of the screw. .

As a specific embodiment of a more stable experimental test, the curved part is bent at 90° relative to the long straight part, and the long straight part is provided with several threaded holes, and copper pressing pieces are screwed on the threaded holes , the copper pressing sheet is used to press the end of the high-temperature superconducting strip on the long straight part; in order to avoid the interference of the joint part of the sample due to fixing screws, etc., in this solution, the curved part is relatively The long straight part is bent at 90° with a certain radius, that is, the bending arc length is a quarter circle, so that the end of the sample can be fixed on the long straight part along the curved part, because the curved part points to the outer surface of one end of the bending table 6 It is always tangent to the circular step of the specified test radius, therefore, the specimen can always be close to the bending part, and the close part is a quarter of the arc length of the circle, so that even in the test of small bending diameter, the joint Part of it will not be interfered by fixing screws, etc., which will affect the experimental results.

In a further solution, both the conductive post and the sliding joint are made of red copper with good electrical conductivity, which can improve the accuracy of the test.

In a further solution, the upper and lower support plates, the positioning plate 4, the sliding plate 5 and the bending table 6 are all made of epoxy resin plates, which is beneficial for insulation from the conductive columns.

Please continue to refer to Fig. 1, in order to realize electrification, in this embodiment, the conductive column runs through the upper support plate 2 and the lower support plate 1 in turn, and the conductive column between the upper support plate 2 and the lower support plate 1 There are support plates extending outward, and the conductive joints are fixed between the two support plates; the conductive columns pass through the through grooves on the upper support plate 2 and the lower support plate 1 in turn, and the conductive posts between the two support plates There are support plates extending outward on the column. By fixing the conductive joints on the two support plates, compared with the conventional method of directly connecting with the joints, it is avoided that the power line is moved or disassembled when the test diameter changes. With the installation, the efficiency of the test and the risk of the specimen being damaged are further improved.

Example 2

This embodiment 2 is further optimized on the basis of embodiment 1, and a test method for a high-temperature superconducting strip bending characteristic test device is provided, and the method includes the following steps:

Step 1: Take a REBCO high-temperature superconducting strip sample of an appropriate length, first bypass the circular step with the largest diameter of the bending table 6, and connect it to its end through a sliding joint, and adjust the position of the sliding joint and the bending table 6 so that the test piece The sample is just tight and the bending part is guaranteed to be greater than or equal to 180° around the bending table 6, and the upper surface of the sliding joint pointing to the end of the bending table 6 is adjusted to be tangent to the circular step of the specified test diameter.

Step 2: Weld the voltage leads at an appropriate position away from the two ends of the sample, and ensure that the leads are fixed firmly, and at the same time connect the power line to the conductive joint of the conductive column.

Step 3: Put the assembled sample and device into the liquid nitrogen Dewar tank and cool it to the superconducting state with liquid nitrogen, then connect the signal output terminal of the voltage lead to the nanovolt meter and turn on the power to start the test.

Step 4: After testing the maximum bending diameter, turn off the power to take out the sample and the device as a whole, adjust the position of the sample to the second largest bending diameter by adjusting the position of the sliding joint and bending table 6, and ensure the state of the sample As described in step 1, repeat step 3 when complete.

Step 5: In subsequent tests, test the high-temperature superconducting strips on the circular steps of the bending table in order of bending diameters from large to small, and repeat step 4 until the smallest diameter test is completed and The sample is disassembled and the experimental device is organized.

A high-temperature superconducting strip bending test method provided in this embodiment, through the device described in the technical solution and the four-lead method, completes the critical current test under different bending radii according to the above steps, so as to realize the bending characteristics of different strips Evaluation, which provides an important reference for the design and manufacture of cables and magnets.

Example 3

As shown in FIG. 2 , this embodiment 3 conducts experiments on the basis of embodiment 2, and provides specific experimental data. Using the patent and testing method of the present invention, the high-temperature superconducting tapes of Suzhou New Materials and Shanghai Superconductor were respectively selected for testing. The width of the strip is 2mm, the length is 33cm, the distance between the voltage leads is 10cm, the distance between the two ends of the leads is 11.5cm, the test temperature is liquid nitrogen 77K, and the superconducting layer is close to the outside of the bend during the test. The change curve can be seen in Figure 2.

From the above examples, it can be seen that the critical bending characteristics of the high-temperature superconducting strips were tested using the patent and test method of the present invention. It is less than 6mm, which is consistent with the test results provided by each of them, and a good curve of normalized critical current changing with bending diameter has been obtained, which shows that the patent and test method of the present invention have good practicability and can be popularized.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (10)

1. A bending characteristic testing device for a high-temperature superconducting tape is characterized by comprising:

the bending table (6) is formed by stacking concentric axes of circular steps with diameters sequentially reduced from bottom to top, and the bending table (6) is arranged on the workbench through a sliding plate (5);

the conductive columns are arranged on the workbench, two sides of the bending platform (6) are respectively provided with the conductive columns, sliding joints in sliding connection are arranged on the conductive columns, and the sliding joints are used for connecting the end parts of the high-temperature superconducting tapes;

the sliding plate (5) can slide longitudinally towards the direction far away from or close to the conductive column; the slip joint is slidable vertically and laterally relative to the conductive post.

2. The bending property testing device of the high-temperature superconducting tape as claimed in claim 1, wherein the working table comprises an upper supporting plate (2) and a lower supporting plate (1), the upper supporting plate (2) and the lower supporting plate (1) are connected through a plurality of supporting screws (3), and the upper supporting plate (2) and the lower supporting plate (1) are parallel to each other; the bending table (6) is arranged on the upper supporting plate (2) through a sliding plate (5).

3. A high temperature superconducting tape bending property testing device according to claim 2, wherein the upper support plate (2) and the sliding plate (5) are provided with sliding grooves, the sliding grooves are longitudinally arranged, and screws are arranged on the two sliding grooves in a penetrating manner.

4. The bending property testing device of a high temperature superconducting tape as claimed in claim 2, wherein a positioning plate (4) is further fixed on the upper supporting plate (2), and the side edge of the positioning plate (4) and the side edge of the sliding plate (5) close to the positioning plate are flush with each other and arranged along the sliding direction of the sliding plate (5).

5. The device for testing the bending property of the high-temperature superconducting tape as claimed in claim 1, wherein a vertical through groove is formed in the conductive column along the height direction of the conductive column, and the sliding joint is connected with the vertical through groove through a screw.

6. A device for testing the bending properties of a high temperature superconducting tape as claimed in claim 5, wherein the slip joints comprise bending portions which are bent in the direction of a bending table (6), the bending portions of the two slip joints being arranged opposite to each other; the length direction of the bending part is the walking direction of the high-temperature superconducting tape; the sliding joint moves transversely and is used for driving the outer side face of one end, pointing to the bending table (6), of the bending part to be tangent to the circular step with the designated test radius.

7. A high temperature superconducting tape bending property testing device according to claim 6, wherein the sliding joint further comprises an elongated straight portion connected with the bending portion, the elongated straight portion is provided with a transverse through groove, the transverse through groove is arranged along a sliding direction perpendicular to the sliding plate (5), and the screw on the vertical through groove penetrates through the transverse through groove.

8. The apparatus as claimed in claim 7, wherein the curved portion is bent at 90 ° with respect to the long straight portion, the long straight portion has a plurality of threaded holes, and the threaded holes are screwed with copper pressing pieces for pressing the end of the high temperature superconducting tape against the long straight portion.

9. The bending property testing device of a high temperature superconducting tape as claimed in claim 2, wherein the conductive column sequentially penetrates through the upper supporting plate (2) and the lower supporting plate (1), an outwardly extending supporting plate is provided on the conductive column between the upper supporting plate (2) and the lower supporting plate (1), and a conductive joint is fixedly arranged between the two supporting plates.

10. The method for testing the bending property of the high-temperature superconducting tape according to any one of claims 1 to 9, wherein the method comprises the steps of:

the method comprises the following steps: the high-temperature superconducting tape bypasses the circular step with the largest diameter of the bending table (6), and the two ends of the high-temperature superconducting tape are respectively connected to the two sliding joints; then adjusting the positions of the bending table (6) and the sliding joint to ensure that the high-temperature superconducting tape is just tightened, and the bent part winds the bending table (6) for more than or equal to 180 degrees;

step two: welding a voltage lead and simultaneously connecting the power line with the conductive sliding joint on the conductive column;

step three: placing the assembled test device in a liquid nitrogen environment to be cooled to a superconducting state, then connecting the output end of a voltage lead to a nano-volt meter, and switching on a power supply to start an experiment;

step four: after the maximum bending diameter is tested, the power supply is turned off, the testing device is taken out, the bending table (6) and the sliding joint are adjusted again, the high-temperature superconducting tape is adjusted to the position with the second largest bending diameter, the state of the high-temperature superconducting tape is ensured to be as shown in the step one, and the step 3 is repeated after the test is finished;

step five: and repeating the step four, and sequentially testing the high-temperature superconducting tapes on the circular steps of the bending table (6) according to the sequence of the bending diameters from large to small until the minimum diameter test is completed.

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