Superconducting tape current-carrying test device and test method

Abstract

The invention discloses a superconducting tape current-carrying test device and a test method. The superconducting tape current-carrying test device comprises a tape fixing module, a temperature control module and a stretching module, the tape fixing module comprises a first isolation plate, a first tension base, a second tension base and a second isolation plate, and the first tension base and the second tension base are oppositely arranged; the temperature control module comprises a low-temperature container and a lifting platform, and the lifting platform bears the low-temperature container; and the stretching module is connected with the first tension base and / or the second tension base. Through the arrangement of the first isolation plate and the second isolation plate, the isolation plates have heat insulation and insulation functions, it is guaranteed that the superconducting tape is in a stable and uniform temperature state, and the tape fixing module and the stretching module can be isolated. By arranging the low-temperature container and the lifting platform, the superconducting tape can enter or break away from the low-temperature container flexibly, operation is convenient, and temperature control is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of superconducting tapes, and in particular to a current-carrying test device and a test method for superconducting tapes. Background Art

[0002] Superconducting tape is a conductor material that can transmit electric current without resistance under low temperature conditions. Its current carrying capacity is 100 times that of copper wires of the same size, and it can achieve lossless power transmission. It has developed rapidly in the fields of energy, electricity, transportation, etc. In practical applications, superconducting tapes in low temperature environments may be subject to additional stress or strain. When the strain exceeds the maximum allowable value, the current carrying performance of the superconducting tape will be seriously damaged. Since the current carrying performance of the superconducting layer of the superconducting tape is sensitive to mechanical strain, it is necessary to test the strain and current carrying performance of the superconducting tape.

[0003] The current-carrying performance test of superconducting tapes under low temperature and strain conditions places strict requirements on the test equipment. It is necessary to apply tension to the superconducting tape in a liquid nitrogen environment to cause it to deform, and at the same time pass a set current between the upper and lower current lead plates. When a test current of 50A~250A is passed, the current-passing area is required to be insulated from the main body of the equipment. Existing equipment has deficiencies in insulation design, making it difficult to effectively isolate the current-passing area from the main body of the equipment, resulting in the risk of current leakage or short circuit during the test. Existing test methods need to be carried out under multiple conditions of low temperature, strain and current, which are complicated to operate and have high technical requirements for operators, increasing the difficulty and cost of testing.

[0004] In summary, the existing superconducting tape testing process is complicated to operate and there is a risk of current leakage or short circuit. Summary of the invention

[0005] The purpose of this application is to overcome the above technical deficiencies, propose a superconducting tape current-carrying test device and test method, and solve the technical problems in the prior art of complex operation and the risk of current leakage or short circuit.

[0006] In order to achieve the above technical objectives, this application adopts the following technical solutions: In a first aspect, the present application provides a superconducting tape current-carrying test device, including a tape fixing module, a temperature control module, and a stretching module: A tape fixing module, comprising a first isolation plate, a first tension base, a second tension base and a second isolation plate, wherein the first tension base and the second tension base are arranged opposite to each other for fixing the superconducting tape, the first isolation plate is located below the first tension base, and the second isolation plate is located above the second tension base; The temperature control module comprises a cryogenic container and a lifting platform, wherein the cryogenic container is sleeved on the outer sides of the first tension base and the second tension base, and the lifting platform carries the cryogenic container; A stretching module is connected to the first tension base and / or the second tension base.

[0007] In some embodiments of the present application, the strip fixing module further includes a first current-carrying plate and a second current-carrying plate, wherein the first current-carrying plate is located between the first isolation plate and the first tension base, and the second current-carrying plate is located between the second isolation plate and the second tension base.

[0008] In some embodiments of the present application, the strip fixing module further includes a first isolation ring, a first pressure ring, a second isolation ring and an annular gasket, the first isolation ring and the first pressure ring sequentially cover the first current-carrying plate, and the second isolation ring and the annular gasket sequentially cover the second current-carrying plate.

[0009] In some embodiments of the present application, the strip fixing module further includes a first strip clamp and a second strip clamp, wherein the first strip clamp is arranged on a side of the first tension base facing the second tension base, and the second strip clamp is arranged on a side of the second tension base facing the first tension base.

[0010] In some embodiments of the present application, the stretching module further includes a first pull rod, a tension sensor and a stretching motor, the first pull rod is disposed on the first isolation plate and connected to one end of the tension sensor, and the stretching motor is connected to the other end of the tension sensor.

[0011] In some embodiments of the present application, the stretching module also includes a pull rod adapter, a sensor adapter and a motor adapter. The first pull rod is connected to the tension sensor through the pull rod adapter, and the tension sensor is connected to the stretching motor through the sensor adapter and the motor adapter.

[0012] In some embodiments of the present application, the strip fixing module also includes a top plate, a bottom plate and a second pull rod, the top plate is arranged opposite to the bottom plate, the bottom plate carries the first isolation plate, the top plate carries the stretching module, and a plurality of second pull rods are arranged in parallel, and the two ends of each second pull rod are respectively connected to the top plate and the bottom plate.

[0013] In a second aspect, the present application further provides a method for testing a current carrying capacity of a superconducting tape, using a superconducting tape current carrying capacity testing device as described in any one embodiment of the first aspect, comprising the following steps: Correct the alignment of the strip holding module and the stretching module; fixing the superconducting tape on the first tension base and the second tension base; By adjusting the stretching module, the superconducting tape is placed in an elongated state; Adjusting the lifting platform so that the superconducting tape enters or leaves the cryogenic container; The properties of the superconducting tape were tested.

[0014] In some embodiments of the present application, fixing the superconducting tape on the first tension base and the second tension base includes: A first strip clamp and a second strip clamp are fixed on the first tension base and the second tension base respectively; Using a plurality of the superconducting tapes and welding them in the first tape fixture and the second tape fixture; The first strip clamp and the second strip clamp are filled with solder.

[0015] In some embodiments of the present application, the testing the performance of the superconducting tape comprises: Testing the tensile properties of the superconducting tape in a cryogenic environment; Testing the stress fatigue resistance of different superconducting tapes; Testing the influence of thermal cycling stress on the current carrying performance of the superconducting tape; Testing the effect of tensile deformation on the current carrying performance of the superconducting tape at room temperature; The effect of tensile deformation on the current carrying performance of the superconducting tape in a low temperature environment is tested.

[0016] Compared with the prior art, the technical solution provided by this application has the following beneficial technical effects: The present application sets a first isolation plate and a second isolation plate in the strip fixing module. The isolation plates have heat insulation and insulating functions. The heat insulation function can ensure that the test section of the superconducting strip is in a stable and uniform temperature state as a whole, and the insulating function can isolate the strip fixing module from the stretching module. The setting of the stretching module can not only ensure the measurement accuracy and controllability of the tension and tensile displacement, but also realize the online stress and strain operation of the superconducting strip during the current-carrying performance test of the superconducting strip. The setting of the cryogenic container and the lifting platform facilitates the flexible entry or exit of the superconducting strip into or out of the cryogenic container, which is convenient for operation and temperature control; the lifting design helps to maintain the stable and uniform low-temperature state of the superconducting strip. The temperature fluctuation caused by manual operation can be reduced, thereby improving the accuracy and reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution in this application, the following is a brief introduction to the drawings required for use in the embodiments: Figure 1 It is a structural schematic diagram of a superconducting tape current-carrying test device provided in an embodiment of the present application; Figure 2is a side view of a superconducting tape current-carrying test device provided in an embodiment of the present application; Figure 3 It is a flow chart of a superconducting tape current-carrying test method provided in an embodiment of the present application.

[0018] Reference numerals: Strip fixing module 1, first isolation plate 11a, second isolation plate 11b, first tension base 12a, second tension base 12b, first current-carrying plate 13a, second current-carrying plate 13b, first isolation ring 14a, second isolation ring 14b, first pressure ring 15a, annular gasket 15b, first strip clamp 16a, second strip clamp 16b, top plate 17, bottom plate 18, second pull rod 19; Temperature control module 2, low temperature container 21, lifting platform 22; Stretching module 3, first pull rod 31, tension sensor 32, motor adapter 33, pull rod adapter 34, sensor adapter 35; Superconducting tape4. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] Those skilled in the art will appreciate that in this specification, the wording "including" is an open-ended expression, which means that the described features exist but does not exclude other features. The directional words "up", "down", "left", "right", etc. are exemplary directions based on the drawings. Features defined as "first" and "second" implicitly include one or more of the features. Singular expressions can also be used in the plural. "Multiple" means two or more. The terms "installed", "connected", and "connected" can be fixed connections, detachable connections, or integrated connections; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two elements. In addition, "connected" can include wireless connections.

[0021] The purpose of this application is to overcome the above technical deficiencies, propose a superconducting tape current-carrying test device and test method, and solve the technical problems in the prior art of complex operation and the risk of current leakage or short circuit.

[0022] In order to achieve the above technical objectives, this application adopts the following technical solutions: In a first aspect, the present application provides a superconducting tape current-carrying test device, comprising a tape fixing module 1, a temperature control module 2 and a stretching module 3, such as Figure 1 and Figure 2 shown.

[0023] The strip fixing module 1 includes a first isolation plate 11a, a first tension base 12a, a second tension base 12b and a second isolation plate 11b. The first tension base 12a and the second tension base 12b are arranged opposite to each other for fixing the superconducting strip 4. The first isolation plate 11a is located below the first tension base 12a, and the second isolation plate 11b is located above the second tension base 12b. The strip fixing module 1 is combined with the stretching module 3 to realize the online stress and strain operation of the superconducting strip 4 during the current carrying performance test of the superconducting strip 4. By setting the isolation plate, it is ensured that the test section of the superconducting strip 4 is in a stable and uniform temperature state. The insulation and heat insulation functions of the isolation plate can be realized by using an epoxy plate, but are not limited to epoxy plates.

[0024] The temperature control module 2 includes a cryogenic container 21 and a lifting platform 22. The cryogenic container 21 is sleeved on the outside of the first tension base 12a and the second tension base 12b, and the lifting platform 22 carries the cryogenic container 21. The arrangement of the cryogenic container 21 and the lifting platform 22 facilitates the superconducting tape 4 to flexibly enter or leave the cryogenic container 21, and realizes the control of the heating or cooling process. The lifting design helps to maintain the stable and uniform low temperature state of the superconducting tape 4, reduce the temperature fluctuation caused by manual operation, and improve the accuracy and reliability of the test results.

[0025] The stretching module 3 is connected to the first tension base 12a and / or the second tension base 12b.

[0026] The present application sets a first isolation plate 11a and a second isolation plate 11b in the strip fixing module 1. The isolation plates have heat insulation and insulation functions. The heat insulation function can ensure that the test section of the superconducting strip 4 is in a stable and uniform temperature state as a whole, and the insulation function can isolate the strip fixing module 1 from the stretching module 3. The setting of the stretching module 3 can not only ensure the measurement accuracy and controllability of the tension and tensile displacement, but also realize the online stress and strain operation of the superconducting strip 4 during the current carrying performance test of the superconducting strip 4. The setting of the low-temperature container 21 and the lifting platform 22 facilitates the superconducting strip 4 to flexibly enter or leave the low-temperature container 21, which is convenient for operation and temperature control; the lifting design helps to maintain the stable and uniform low-temperature state of the superconducting strip 4. The temperature fluctuation caused by manual operation can be reduced, thereby improving the accuracy and reliability of the test results.

[0027] In some embodiments of the present application, the strip fixing module 1 further includes a first current-carrying plate 13a and a second current-carrying plate 13b, wherein the first current-carrying plate 13a is located between the first isolation plate 11a and the first tension base 12a, and the second current-carrying plate 13b is located between the second isolation plate 11b and the second tension base 12b.

[0028] The strip fixing module 1 is connected by bolts between the top plate 17 and the bottom plate 18 to form a main structure with good stability for supporting other components. The bottom plate 18 has a groove on the upper side to fix the first isolation plate 11a at the bottom to ensure its stable position. The upper side of the first isolation plate 11a is the first current-carrying plate 13a at the bottom, which is used for connecting the current source.

[0029] The second tension base 12b has a second current-carrying plate 13b on the upper side thereof, which is used for connecting a current source. The second current-carrying plate 13b has a second isolation plate 11b on the upper side thereof, which realizes insulation and heat insulation between the second tension base 12b and the first tension rod 31 .

[0030] A first current-carrying plate 13a and a second current-carrying plate 13b are arranged opposite to each other in the strip fixing module 1. The two current-carrying plates are respectively located between the first isolation plate 11a and the first tension base 12a, and between the second isolation plate 11b and the second tension base 12b. The current-carrying plates are used to connect a current source so as to load current on the superconducting strip 4.

[0031] In some embodiments of the present application, the strip fixing module 1 further includes a first isolation ring 14a and a first pressure ring 15a, and the first isolation ring 14a and the first pressure ring 15a are sleeved on the outside of the first tension base 12a and cover the first current-carrying plate 13a in sequence.

[0032] The upper side of the first tension base 12a is the first isolation ring 14a, which can be an epoxy isolation ring; the first isolation ring 14a is embedded in the groove of the first pressure ring 15a, which can be a metal pressure ring; the first pressure ring 15a is connected and fixed to the bottom plate 18 by bolts, and the various components therebetween are fixed, and the bottom plate 18 can be a metal round plate.

[0033] The first isolation ring 14a and the first pressure ring 15a are sleeved on the outer side of the first tension base 12a, and cover the first current-carrying plate 13a in sequence. The main functions of these two annular components are to provide additional insulation and pressure distribution.

[0034] The first isolation ring 14a is usually made of epoxy material with good insulation performance, located on the upper side of the first tension base 12a, and embedded in the groove of the first pressure ring 15a. The use of the first isolation ring 14a provides an additional insulation layer to prevent current leakage and ensure the safety of the current path during the test.

[0035] The first pressure ring 15a is usually made of metal material to provide structural strength and pressure. It is connected and fixed to the bottom plate 18 by bolts to ensure the stability of the entire base module. The first pressure ring 15a can evenly distribute pressure, protect the first current-carrying plate 13a and the first tension base 12a, and prevent damage caused by excessive local pressure.

[0036] In some embodiments of the present application, the strip fixing module 1 further includes a second isolation ring 14b and an annular gasket 15b, and the second isolation ring 14b and the annular gasket 15b are sleeved on the outside of the first pull rod 31 and cover the second current-carrying plate 13b in sequence.

[0037] The upper side of the first pull rod 31 is the second isolation ring 14b, which can be an epoxy isolation ring; the upper side of the second isolation ring 14b is an annular gasket 15b; the annular gasket 15b is fixed to the second tension base 12b by bolts; the annular gasket 15b is used to protect the second isolation ring 14b.

[0038] The second isolation ring 14b and the annular gasket 15b are sleeved on the outer side of the first pull rod 31, and cover the second current-carrying plate 13b in sequence. The main functions of these components are to provide insulation and protection.

[0039] The second isolation ring 14b is usually made of epoxy material, has good insulation properties, and is located on the upper side of the first pull rod 31. The annular gasket 15b is located on the upper side of the second isolation ring 14b, and is fixed to the second tension base 12b by bolts to protect the second isolation ring 14b from damage. The first tension base 12a is insulated in the vertical direction by upper and lower epoxy materials to ensure contact-free insulation between the first base and the second pull rod 19 and the bottom fixing bolts. The various epoxy components meet the insulation and heat insulation effects at the same time. Epoxy materials have both insulation and heat insulation effects, which help maintain the stability of the test environment. Through these insulation and heat insulation measures, the influence of external factors on the test results is reduced, and the reliability and accuracy of the test are improved.

[0040] The central circular hole of the annular gasket 15b is larger than the diameter of the first tie rod 31, achieving non-contact insulation. The central circular hole of the second isolation ring 14b is consistent with the diameter of the first tie rod 31, ensuring fastening without affecting the insulation performance. The apertures of the multiple through holes at the bottom of the first tie rod 31 are much larger than the annular gasket 15b and the second isolation ring 14b, so that the bolts can pass through without contacting the first tie rod 31. The bolts between the second tension base 12b and the annular gasket 15b are wrapped with insulating paper to achieve double insulation between the first tie rod 31 and the bolts. The use of the annular gasket 15b protects the second isolation ring 14b, prolongs its service life, and reduces maintenance costs.

[0041] The design of the epoxy isolation ring and the annular gasket 15b achieves efficient electrical insulation, prevents current leakage, and ensures the safety of the test. The design of the central circular hole and the insulation wrapping of the bolt ensures double insulation between the first pull rod 31 and the bolt, avoiding the risk of short circuit.

[0042] In some embodiments of the present application, the strip fixing module 1 further includes a first strip clamp 16a and a second strip clamp 16b, wherein the first strip clamp 16a is arranged on a side of the first tension base 12a facing the second tension base 12b, and the second strip clamp 16b is arranged on a side of the second tension base 12b facing the first tension base 12a.

[0043] The first tape clamp 16a and the second tape clamp 16b are used to directly contact the superconducting tape 4 to fix the superconducting tape 4. The superconducting tape 4 and the tape fixing module 1 are connected by welding clamp crimping: the arrangement of the tape clamp makes the replacement of the superconducting tape 4 easier.

[0044] The first current-carrying plate 13a at the bottom is connected to the first tension base 12a at the bottom, which is connected to the first strip clamp 16a to bear the strip tension; the strip welding clamp is fixed to the first tension base 12a by bolts. The second strip clamp 16b at the upper side is connected to the second tension base 12b by bolts; the superconducting strip 4 is connected to the first strip clamp 16a and the second strip clamp 16b by soldering, so that the superconducting strip 4 is fixed and the current is passed.

[0045] In some embodiments of the present application, the stretching module 3 also includes a first pull rod 31, a tension sensor 32 and a stretching motor, the first pull rod 31 is arranged on the first isolation plate 11a and connected to one end of the tension sensor 32, and the stretching motor is connected to the other end of the tension sensor 32.

[0046] In the tension transmission module, the first tension rod 31 is located on the first isolation plate 11 a, one end of which is connected to the tension sensor 32 and the other end of which is connected to the tension motor. In this way, the tension motor can apply tension to the superconducting tape 4 through the first tension rod 31 .

[0047] The stretching motor applies a programmed stretching force to the superconducting tape 4 according to the test requirements, and the tension sensor 32 monitors and feeds back the magnitude of the stretching force in real time, thereby achieving programmed strain control of the superconducting tape 4.

[0048] In some embodiments of the present application, the stretching module 3 also includes a pull rod adapter 34, a sensor adapter 35 and a motor adapter 33. The first pull rod 31 is connected to the tension sensor 32 through the pull rod adapter 34, and the tension sensor 32 is connected to the stretching motor through the sensor adapter 35 and the motor adapter 33.

[0049] The upper side of the second isolation plate 11b is the first pull rod 31, and the upper side of the first pull rod 31 is the pull rod adapter 34, which is connected to the tension sensor 32; the upper side of the tension sensor 32 is the tension sensor 32 adapter and the motor adapter 33, which are connected to the stretching motor to apply program strain to the material to be tested. These adapters are used to convert and transmit torque to ensure accurate transmission and measurement of tensile force.

[0050] Through the cooperation of the stretching motor and the tension sensor 32, the stretching force of the superconducting tape 4 can be accurately controlled to improve the accuracy of the test. The stretching motor can automatically apply strain according to a preset program to achieve automated testing and reduce human errors. The tension sensor 32 can monitor the magnitude of the stretching force in real time to ensure the stability of the force during the test, which helps to obtain reliable test data.

[0051] In some embodiments of the present application, the strip fixing module 1 also includes a top plate 17, a bottom plate 18 and a second pull rod 19, the top plate 17 is arranged opposite to the bottom plate 18, the bottom plate 18 carries the first isolation plate 11a, the top plate 17 carries the stretching module 3, and multiple second pull rods 19 are arranged in parallel, and the two ends of each second pull rod 19 are respectively connected to the top plate 17 and the bottom plate 18.

[0052] The bottom plate 18 and the top plate 17 are arranged opposite to each other to form the main structure of the device and provide support for other modules. The bottom plate 18 mainly supports the strip fixing module 1, and the top plate 17 is provided with a through hole to facilitate the strip fixing module 1 and the superconducting strip 4 to pass through the through hole to connect with the stretching module 3. The top plate 17 mainly supports the tension of the stretching module 3 and balances the upward tension of the strip fixing module 1.

[0053] The part below the top plate 17 is immersed in a cryogenic container 21 to achieve the low temperature of the superconducting tape. The cryogenic container 21 can be a liquid nitrogen tank to achieve a low temperature environment for the superconducting tape 4. In this way, the temperature of the superconducting tape 4 can be reduced to make it reach a superconducting state. The cryogenic container 21 can adjust the manual fixed lifting platform 22 to control the immersion depth and time of the superconducting tape 4 sample. The main body of the equipment applies tension through the second tension rod 19 to deform the superconducting tape 4 between the first tension base 12a and the second tension base 12b. The first current-carrying plate 13a and the second current-carrying plate 13b are connected to the current source, which is crimped with bolts to the tension base, and the current is transmitted to the superconducting tape 4 through the first tape clamp 16a and the second tape clamp 16b.

[0054] A plurality of second tie rods 19 are arranged in parallel, and the two ends of each second tie rod 19 are respectively connected to the top plate 17 and the bottom plate 18. These tie rods are used to maintain the stability of the main module and ensure that the distance between the top plate 17 and the bottom plate 18 remains unchanged.

[0055] The current-carrying plate is crimped to the back of the first tension base 12a and the second tension base 12b and connected to the power line. The first current-carrying plate 13a and the second current-carrying plate 13b are respectively connected to the current source and crimped to the tension base by bolts. The strip welding fixture transmits current to the superconducting strip 4 for current carrying test.

[0056] In a second aspect, the present application further provides a method for testing the current carrying capacity of a superconducting tape, using a superconducting tape current carrying capacity testing device as described in any one of the embodiments of the first aspect, such as Figure 3 As shown, Figure 3 It is a flow chart of a superconducting tape current-carrying test method provided in an embodiment of the present application.

[0057] A method for testing current carrying of a superconducting tape comprises the following steps: S1. Correction of the alignment of the strip fixing module 1 and the stretching module 3; Specifically, the overall alignment of the test device is corrected through the draping method, and after one adjustment is completed, no adjustment is required for subsequent tests.

[0058] S2. The superconducting tape 4 is fixed to the first tension base 12a and the second tension base 12b; S3. By adjusting the stretching module 3, the superconducting tape 4 is in an elongated state; S4. Adjust the lifting platform 22 so that the superconducting tape 4 enters or leaves the cryogenic container 21; S5. Testing the performance of the superconducting tape 4.

[0059] In some embodiments of the present application, the step of fixing the superconducting tape 4 on the first tension base 12a and the second tension base 12b includes: S21. Fixing the first strip clamp 16a and the second strip clamp 16b on the first tension base 12a and the second tension base 12b respectively; S22. Using a plurality of the superconducting tapes 4 and welding them in the first tape fixture 16a and the second tape fixture 16b; S23. Fill the first strip clamp 16a and the second strip clamp 16b with solder.

[0060] Specifically, a 200 mm long superconducting tape 4 is welded to the first tape fixture 16a and the second tape fixture 16b by welding, and two 30 mm long superconducting tapes are welded to strengthen the end strength of the tensile sample. After welding, the tape fixture is filled with solder, and the superconducting tape 4 is close to the bottom of the tape fixture. During the welding process, it is necessary to ensure that the solder fills the entire tape fixture to prevent the superconducting tape 4 from being subjected to unilateral force during the stretching process. Compared with ordinary clamping fixtures, the use of the tape fixture and the corresponding welding method can reduce damage to the tape.

[0061] In some embodiments of the present application, the testing of the performance of the superconducting tape 4 includes: S51. Testing the tensile properties of the superconducting tape 4 under low temperature conditions; S52. Testing the stress fatigue resistance of the different superconducting tapes 4; S53. Testing the effect of thermal cycle stress on the current carrying performance of the superconducting tape 4; S54. Testing the effect of tensile deformation on the current carrying performance of the superconducting tape 4 at room temperature; S55. Test the influence of tensile deformation on the current carrying performance of the superconducting tape 4 in a low temperature environment.

[0062] In one embodiment, a method for testing the tensile properties of a superconducting tape 4 in a low temperature environment includes: S5101. By adjusting the stretching motor, the superconducting tape 4 is in an elongated state; S5102. Arrange a low-temperature temperature sensor on the second tension base to monitor whether the temperature of the superconducting tape 4 is stable; S5103. The portion below the top plate 17 is inserted into the cryogenic container 21, and a manual fixed lifting platform 22 is placed at the bottom, and liquid nitrogen is injected and immersed in a liquid nitrogen pool; S5104. Adjust the manual fixed lifting platform 22 so that the liquid nitrogen covers the first pull rod 31; S5105. By observing the stability of the liquid nitrogen level and the temperature change of the second tension base 12b, it is determined that the temperature of the test strip remains stable; S5106. Set the stretching rate to 5 mm / min (not limited to), input the strip length and other dimensional parameters, and start the stretching test; S5107. Record the displacement and tension changes, and analyze the mechanical properties of superconducting tape 4 at liquid nitrogen temperature.

[0063] In another embodiment, a room temperature tensile fatigue test method for a superconducting tape 4 includes: S5201. By adjusting the motor adapter 33, the superconducting tape 4 is in an extended state; S5202. Arrange a low-temperature temperature sensor on the second tension base to monitor whether the temperature of the superconducting tape 4 is stable; S5203. Set the fatigue test stress cycle parameters, set the stress, amplitude, frequency, and start the fatigue test; S5204. After a fixed number of cycles, the fatigue test is stopped; S5205. Two voltage test points separated by 100 mm (not limited to) are clamped in the main stretching area of ​​the superconducting tape 4 for determining the critical current point; S5206. Connect the current source to the first current carrying plate 13a and the second current carrying plate 13b respectively; S5207. The portion below the top plate 17 is placed into the cryogenic container 21, and a manual fixed lifting platform 22 is placed at the bottom, and liquid nitrogen is injected and immersed in a liquid nitrogen pool; S5208. Adjust the manual fixed lifting platform 22 so that the liquid nitrogen covers the first pull rod 31; S5209. By observing the stability of the liquid nitrogen level and the temperature change of the second tension base 12b, it is determined that the temperature of the test strip remains stable; S5210. A current with a rising rate of 2 V / s (not limited thereto) is introduced. When the voltage difference between the two voltage measuring points increases and reaches the critical current criterion, the loading is stopped and the rising current and critical current of the superconducting tape 4 at the liquid nitrogen temperature are recorded; S5211. Replace the superconducting tape 4, set different fatigue test parameters, and continue to carry out steps S5201~S5209; S5212. Analyze and obtain the tensile fatigue characteristics of a specific superconducting tape 4, and further analyze the stress (strain) fatigue resistance of different superconducting tapes 4.

[0064] In the third embodiment, the thermal cycle stress fatigue test of the superconducting tape 4 includes: S5301. By adjusting the stretching motor, the superconducting tape 4 is in an elongated state; S5302. Connect the current source to the first current-carrying plate 13a and the second current-carrying plate 13b respectively; S5303. Arrange a low-temperature temperature sensor on the second tension base to monitor whether the temperature of the superconducting tape 4 is stable; S5304.In the test main area, two voltage measuring points are clamped at positions 100 mm (not limited to) apart; S5305. Apply a fixed tensile stress (15N) to the superconducting tape 4; S5306. The portion below the top plate 17 is inserted into the cryogenic container 21, and a manual fixed lifting platform 22 is placed at the bottom, and liquid nitrogen is injected and immersed in a liquid nitrogen pool; S5307. Adjust the manual fixed lifting platform 22 so that the liquid nitrogen covers the first pull rod 31; S5308. By observing the stability of the liquid nitrogen level and the temperature change of the second tension base 12b, it is determined that the temperature of the test strip remains stable; S5309. A current with a rising rate of 2 V / s (not limited thereto) is introduced. When the voltage difference between the two voltage measuring points increases and reaches the critical current criterion, the loading is stopped and the rising current and critical current of the superconducting tape 4 at the liquid nitrogen temperature are recorded; S5310. Adjust the manual fixed lifting platform 22 so that the first tension base 12a is on the upper side of the liquid nitrogen surface; S5311. Wait for the temperature of the second tension base 12b to return to normal temperature; S5312. Repeat steps S5307 to S5311; S5313. Complete the test data of the influence of different cold and hot cycle stress times on the current carrying performance of superconducting tape 4; S5314. Replace the superconducting tape 4, set different fixed tensile stresses, and continue to carry out the S5301-S5313 step test; S5315. Analyze the influence of hot-cold cycle stress on the current-carrying performance of superconducting tape 4 under different fixed tensile stress states.

[0065] In the fourth embodiment, the test experiment of the influence of the room temperature tensile deformation of the superconducting tape 4 on the current carrying performance includes: S5401. By adjusting the stretching motor, the superconducting tape 4 is in an elongated state; S5402. Arrange a low-temperature temperature sensor on the second tension base to monitor whether the temperature of the superconducting tape 4 is stable; S5403. Two voltage test points separated by 100 mm (not limited to) are clamped in the main stretching area of ​​the superconducting tape 4 for determining the critical current point; S5404. Connect the current source to the first current carrying plate 13a and the second current carrying plate 13b respectively; S5405. Set the series of strip gradient deformation, 0.5%, 1%, 1.5%... (not limited to); S5406. Set the stretching distance so that the strip deformation is the target deformation, and the rate is 1mm / min (not limited to); S5407. After reaching the target deformation amount, the tensile stress is removed so that the superconducting tape 4 rebounds; S5408. The portion below the top plate 17 is inserted into the cryogenic container 21, and a manual fixed lifting platform 22 is placed at the bottom, and liquid nitrogen is injected and immersed in a liquid nitrogen pool; S5409. Adjust the manual fixed lifting platform 22 so that the liquid nitrogen does not pass the upper pull rod; S5410. By observing the stability of the liquid nitrogen level and the temperature change of the second tension base 12b, it is determined that the temperature of the test strip remains stable; S5411. A current with a rising rate of 2V / s (not limited to) is introduced. When the voltage difference between the two voltage measuring points increases and reaches the critical current criterion, the loading is stopped and the rising current and critical current of the superconducting tape 4 at the liquid nitrogen temperature are recorded; S5412. Replace the superconducting tape sample 4 and the target deformation amount, and re-carry out steps S5401~S5411; S5413. Analyze the strip deformation and head-up current to obtain the correction curve of the current carrying performance of the superconducting strip 4 under room temperature tensile deformation; S5414. The target deformation is achieved without removing the tensile stress, so that the superconducting tape 4 maintains a fixed deformation, and repeats the test work to obtain the relationship curve between the cooling stress and the current carrying performance of the superconducting tape 4 under different tensile deformations; In the fifth embodiment, the influence of the tensile deformation of the superconducting tape 4 under low temperature conditions on the current carrying performance includes: S5501. By adjusting the stretching motor, the superconducting tape 4 is in an elongated state; S5502. Arrange a low-temperature temperature sensor on the second tension base to monitor whether the temperature of the superconducting tape 4 is stable; S5503. Two voltage test points separated by 100 mm (not limited to) are clamped in the main stretching area of ​​the superconducting tape 4 for determining the critical current point; S5504. Connect the current source to the first current carrying plate 13a and the second current carrying plate 13b respectively; S5505. The portion below the top plate 17 is inserted into the cryogenic container 21, and a manual fixed lifting platform 22 is placed at the bottom, and liquid nitrogen is injected and immersed in a liquid nitrogen pool; S5506. Adjust the manual fixed lifting platform 22 so that the liquid nitrogen does not pass the upper pull rod; S5507. Determine that the temperature of the test strip remains stable by observing the stability of the liquid nitrogen level and the temperature change of the second tension base 12b; S5508. A current with a rising rate of 2 V / s (not limited thereto) is introduced. When the voltage difference between the two voltage measuring points increases and reaches the critical current criterion, the loading is stopped and the rising current and critical current of the superconducting tape 4 at the liquid nitrogen temperature are recorded; S5509. Load current to head-up current; S5510. Set the stretching rate to 1 mm / min (not limited to), and observe the change in voltage difference; S5511. The strain of the strip when the voltage difference increases is the critical deformation of the superconducting strip 4 at low temperature; S5512. Change the loading current to the current actually required; S5513. Set the stretching rate to 1 mm / min (not limited to), and observe the change in voltage difference; S5514. The strain of the tape when the voltage difference increases is the critical deformation of the superconducting tape 4 under specific current-carrying conditions; S5515. By processing the data of the critical deformation amount of the superconducting tape 4 corresponding to a specific current carrier, a calibration curve between the deformation amount of the superconducting tape 4 and the critical current can be obtained.

[0066] Compared with the prior art, the technical solution provided by this application has the following beneficial technical effects: The present application sets a first isolation plate 11a in the base module and a second isolation plate 11b in the tension transmission module. The isolation plate has heat insulation and insulation functions. The heat insulation function can ensure that the test section of the superconducting tape 4 is in a stable and uniform temperature state as a whole, and the insulation function can isolate the tape fixing module 1 from the stretching module 3. The setting of the tape welding fixture makes the replacement of the superconducting tape 4 easier. The setting of the tension sensor 32 can not only ensure the measurement accuracy and controllability of the tension and tensile displacement, but also realize the online stress and strain operation of the superconducting tape 4 during the current carrying performance test of the superconducting tape 4. The setting of the low-temperature container 21 and the lifting platform 22 facilitates the superconducting tape 4 to flexibly enter or leave the low-temperature container 21, and the operation is convenient; the lifting design helps to maintain the stable and uniform low-temperature state of the superconducting tape 4. The temperature fluctuation caused by manual operation can be reduced, thereby improving the accuracy and reliability of the test results.

[0067] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes in the processes discussed in this application may be alternated, modified, rearranged, decomposed, combined, or deleted.

[0068] The specific implementation methods of the present application described above do not constitute a limitation on the protection scope of the present application. Any other corresponding changes and modifications made according to the technical concept of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A superconducting tape current-carrying test device, characterized in that: include: A tape fixing module, comprising a first isolation plate, a first tension base, a second tension base and a second isolation plate, wherein the first tension base and the second tension base are arranged opposite to each other for fixing the superconducting tape, the first isolation plate is located below the first tension base, and the second isolation plate is located above the second tension base; The temperature control module comprises a cryogenic container and a lifting platform, wherein the cryogenic container is sleeved on the outer sides of the first tension base and the second tension base, and the lifting platform carries the cryogenic container; as well as A stretching module is connected to the first tension base and / or the second tension base.

2. The superconducting tape current-carrying test device according to claim 1, characterized in that: The strip fixing module further includes a first current-carrying plate and a second current-carrying plate, wherein the first current-carrying plate is located between the first isolation plate and the first tension base, and the second current-carrying plate is located between the second isolation plate and the second tension base.

3. The superconducting tape current-carrying test device according to claim 2, characterized in that: The strip fixing module further comprises a first isolation ring, a first pressure ring, a second isolation ring and an annular gasket, wherein the first isolation ring and the first pressure ring sequentially cover the first current-carrying plate, and the second isolation ring and the annular gasket sequentially cover the second current-carrying plate.

4. The superconducting tape current-carrying test device according to claim 1, characterized in that: The strip fixing module further comprises a first strip clamp and a second strip clamp, wherein the first strip clamp is arranged on a side of the first tension base facing the second tension base, and the second strip clamp is arranged on a side of the second tension base facing the first tension base.

5. The superconducting tape current-carrying test device according to claim 1, characterized in that: The stretching module further includes a first pull rod, a tension sensor and a stretching motor. The first pull rod is disposed on the first isolation plate and connected to one end of the tension sensor, and the stretching motor is connected to the other end of the tension sensor.

6. The superconducting tape current-carrying test device according to claim 5, characterized in that: The stretching module also includes a pull rod adapter, a sensor adapter and a motor adapter. The first pull rod is connected to the tension sensor via the pull rod adapter, and the tension sensor is connected to the stretching motor via the sensor adapter and the motor adapter.

7. The superconducting tape current-carrying test device according to claim 1, characterized in that: The strip fixing module also includes a top plate, a bottom plate and a second pull rod. The top plate is arranged opposite to the bottom plate. The bottom plate carries the first isolation plate. The top plate carries the stretching module. A plurality of second pull rods are arranged in parallel. Both ends of each second pull rod are respectively connected to the top plate and the bottom plate.

8. A method for testing current carrying capacity of a superconducting tape, characterized in that: The superconducting tape current-carrying test device according to any one of claims 1 to 7 comprises the following steps: Correct the alignment of the strip holding module and the stretching module; fixing the superconducting tape on the first tension base and the second tension base; By adjusting the stretching module, the superconducting tape is placed in an elongated state; Adjusting the lifting platform so that the superconducting tape enters or leaves the cryogenic container; The properties of the superconducting tape were tested.

9. The superconducting tape current-carrying test method according to claim 8, characterized in that: The method of fixing the superconducting tape on the first tension base and the second tension base comprises: A first strip clamp and a second strip clamp are fixed on the first tension base and the second tension base respectively; Using a plurality of the superconducting tapes and welding them in the first tape fixture and the second tape fixture; The first strip clamp and the second strip clamp are filled with solder.

10. The superconducting tape current-carrying test method according to claim 8, characterized in that: The testing of the performance of the superconducting tape comprises: Testing the tensile properties of the superconducting tape in a cryogenic environment; Testing the stress fatigue resistance of different superconducting tapes; Testing the influence of thermal cycling stress on the current carrying performance of the superconducting tape; Testing the effect of tensile deformation on the current carrying performance of the superconducting tape at room temperature; The effect of tensile deformation on the current carrying performance of the superconducting tape in a low temperature environment is tested.

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