Quenching characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions

Abstract

The quench characteristic test sample rod comprises a lead sleeve and a vacuum cavity module, the bottom opening end of the lead sleeve is detachably connected with the vacuum cavity module through a butt flange, and a heat insulation centering mechanism is arranged in an inner cavity of the vacuum cavity module. An upper copper ring and a lower oxygen-free copper ring are arranged at the upper end and the lower end of the heat insulation centering mechanism respectively, an embedded copper heater is installed on the heat insulation centering mechanism in a sleeving mode, and a plurality of superconducting tape samples to be tested are evenly distributed and wound on the circumferential outer wall of the embedded copper heater. And two ends of each superconducting tape sample to be tested are respectively welded and fixedly connected with the upper copper ring and the lower oxygen-free copper ring. According to the invention, the pressure indium sealing of the vacuum cavity module is utilized to provide a quasi-adiabatic working condition for testing, heat exchange between the normal state area of the superconducting tape and the environment can be reduced, heat loss of the superconducting tape in the conduction process is reduced, and thus the accuracy of the quenching propagation characteristic test of the superconducting tape is improved.

Description

Technical Field

[0001] The invention relates to the technical field of quench characteristic testing, and in particular to a quench characteristic testing sample rod suitable for high magnetic field and quasi-adiabatic working conditions. Background Art

[0002] In recent years, with the continuous development of material forming and preparation technology, high-temperature superconducting materials have been favored by people due to their superior current carrying capacity, and their applications have become more and more extensive. However, high-temperature superconducting power equipment is bound to encounter sudden failures during operation, such as system short circuits. At this time, the superconducting material is subjected to the short-circuit high current and the resulting electromagnetic, mechanical stress, and thermal disturbance, which may cause quenching. In addition, when the power equipment is working, the current can reach several thousand amperes or more. If a quench occurs and safety measures are not taken, it will bring immeasurable losses.

[0003] Traditional sample rods are mostly used to test the critical performance of superconducting tapes after external influences are applied. They cannot simulate quasi-adiabatic environments and cannot characterize the key parameters of superconducting tape quench propagation characteristics, such as the minimum quench energy and quench propagation velocity. In addition, ideally, all the heat generated by the quench heater embedded in the superconducting tape should only be used to drive the propagation of the normal state region of the superconducting tape. However, in the traditional sample rod experiment, heat will inevitably be transferred from the normal state region to the environment.

[0004] Compared with the traditional sample rod, the sample rod suitable for quasi-adiabatic conditions can create a "quasi-adiabatic" experimental environment, reducing the heat transfer from the normal state area of ​​the superconducting tape to the environment and improving the accuracy of the experiment. Therefore, it is necessary to design a sample rod for quasi-adiabatic conditions to accurately detect the quench propagation characteristics of superconducting tapes. Summary of the invention

[0005] The object of the present invention is to provide a quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions, which can be used to characterize the key parameters of the quench propagation characteristics of superconducting tapes, such as the minimum quench energy and the quench propagation velocity, reduce the heat exchange between the normal state region of the superconducting tape and the environment, and reduce the heat loss of the superconducting tape during the conduction process.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions, comprising a lead sleeve and a vacuum chamber module, wherein the bottom end of the lead sleeve is detachably connected to the vacuum chamber module through a docking flange, and the top end is inserted and connected to two current leads through a top flange, and a heat-insulating centering mechanism is arranged in the inner cavity of a stainless steel sleeve included in the vacuum chamber module, wherein an upper copper ring and a lower oxygen-free copper ring are respectively arranged at the upper and lower ends of the heat-insulating centering mechanism, and an embedded copper heater is sleeved and installed on the heat-insulating centering mechanism, and a plurality of superconducting tape samples to be tested are evenly wound and arranged on the circumferential outer wall of the embedded copper heater, and the two ends of each of the superconducting tape samples to be tested are respectively welded and fixedly connected to the upper copper ring and the lower oxygen-free copper ring;

[0008] Among them, when the superconducting tape sample to be tested is placed in the vacuum test environment in the vacuum chamber module, one of the current leads is electrically connected to the upper copper ring through a copper adapter, and the other current lead is electrically connected to the lower oxygen-free copper ring through a copper adapter.

[0009] As a further solution of the present invention: the upper copper ring included in the heat insulation centering mechanism is arranged in the copper drill sleeve, the copper drill sleeve and the docking flange are connected by pressing indium seal, and the upper copper ring is fixedly connected to the bottom end of one of the copper adapters by welding;

[0010] The heat-insulating centering mechanism comprises a lower oxygen-free copper ring sleeved on a copper shaft, and the copper shaft is fixedly connected to the bottom end of another copper adapter by welding;

[0011] Among them, two stainless steel tubes and an insulating partition are arranged between the upper copper ring and the copper shaft, the two stainless steel tubes are separated and spaced apart by the insulating partition, and the bottom end of the upper copper ring is positioned in abutment with one of the stainless steel tubes, and the top end of the copper shaft is positioned in abutment with the other stainless steel tube.

[0012] As a further solution of the present invention: when the lower oxygen-free copper ring is sleeved and connected with the copper shaft, a cross copper block is set at the bottom end of the copper shaft through an indium sheet to abut against it, and the cross copper block keeps the lower oxygen-free copper ring and the copper shaft fixedly connected by bolts.

[0013] As a further solution of the present invention: the outer coaxiality of the stainless steel tube is provided with an insulating cylindrical tube, and the insulating cylindrical tube is connected with the insulating cylindrical tube by interference fit; the outer coaxiality of the insulating cylindrical tube is provided with an embedded copper heater, and a gap cavity is provided between the insulating cylindrical tube and the embedded copper heater;

[0014] Wherein, an insulating centering ring is arranged in the gap cavity between the insulating cylindrical tube and the embedded copper heater.

[0015] As a further solution of the present invention: the central axis of the embedded copper heater is arranged to coincide with the central axis of the background magnet, and when the superconducting tape samples to be tested are placed in the high magnetic field test environment of the background magnet, the test magnetic field strength to which the multiple superconducting tape samples to be tested are subjected is uniform.

[0016] As a further solution of the present invention: a vacuum tube is inserted into the top flange, a mounting clamp is sleeved on the top of the vacuum tube extending out of the lead sleeve, and the bottom end of the vacuum tube passes through the docking flange and extends into the inner cavity of the stainless steel sleeve.

[0017] As a further solution of the present invention: a sleeve fixing ring is connected inside the lead sleeve by screws, the sleeve fixing ring is used to insert and connect the vacuum tube, and the sleeve fixing ring fixes two current leads through a right-angle fixing block.

[0018] As a further solution of the present invention: the copper transition device is a copper guide rod, and when the copper transition device is fixedly connected to the current lead by welding, a superconducting tape is welded to the tail end of the current lead.

[0019] As a further solution of the present invention: the hollow inner cavity of the lead sleeve is a vacuum cavity.

[0020] Beneficial effects of the present invention:

[0021] (1) The vacuum chamber module in the present application can satisfy the requirements of the tested superconducting tape sample to achieve sealing, heating and other behavioral characteristics in a liquid helium environment, and utilize the indium pressure seal of the vacuum chamber module to provide quasi-adiabatic conditions for testing, so that almost all the energy emitted by the embedded copper heater during the quench process is used to stimulate the quench of the tested superconducting tape sample, thereby being able to characterize the key parameters of the quench propagation characteristics of the superconducting tape, such as the minimum quench energy and quench propagation velocity, reduce the heat exchange between the normal state region of the superconducting tape and the environment, and reduce the heat loss of the superconducting tape during the conduction process, thereby improving the accuracy of the test of the quench propagation characteristics of the superconducting tape;

[0022] (2) During the installation of the thermal insulation centering mechanism of the present application, the upper copper ring and the lower oxygen-free copper ring are supported and positioned for installation, and the upper copper ring and the lower oxygen-free copper ring are insulated and separated by an insulating partition to ensure the test current loop design of the superconducting tape sample to be tested, which can ensure the stable installation performance of the thermal insulation centering mechanism;

[0023] (3) The insulating cylindrical tube and the embedded copper heater are sequentially installed on the outside of the stainless steel tube in the present application, so that the embedded copper heater can be conveniently and firmly installed on the insulating centering mechanism, which can slow down the radiation heat transfer between the copper heater and the stainless steel support. In addition, the central axis of the embedded copper heater is arranged to coincide with the central axis of the background magnet, which can improve the accuracy of the superconducting tape quench propagation characteristic test;

[0024] (4) By welding the tail end of the current lead to the superconducting tape in the lead sleeve, the heat generated by the current lead during testing can be reduced, thereby ensuring the safety of the test system during testing. In addition, the hollow inner cavity of the lead sleeve is designed as a vacuum cavity to facilitate helium infiltration to cool the device, thereby reducing the heat generated by the current lead during testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 is a top view of the present invention;

[0028] Figure 3 is a schematic diagram of an explosion of a vacuum chamber module of the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the embedded heater of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the stainless steel sleeve included in the vacuum chamber module of the present invention.

[0031] In the figure: 1. current lead; 2. clamp; 3. vacuum tube; 4. top flange; 5. lead sleeve; 6. stainless steel sleeve; 7. sleeve fixing ring; 8. copper adapter; 9. right-angle fixing block; 10. docking flange; 11. copper drill sleeve; 12. upper copper ring; 13. insulating partition; 14. stainless steel pipe; 15. lower oxygen-free copper ring; 16. copper shaft; 17. insulating centering ring; 18. cross copper block; 19. insulating cylindrical tube; 20. embedded copper heater. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in the description of the present invention, the meaning of "multiple" and "several" is at least two, for example two, three, etc., unless otherwise clearly and specifically defined.

[0034] See also Figures 1 to 5 As shown, the present invention is a quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions, including a lead sleeve 5 and a vacuum chamber module, the bottom end of the lead sleeve 5 is detachably connected to the vacuum chamber module through a docking flange 10, and the top end is inserted and connected to two current leads 1 through a top flange 4, and the vacuum chamber module includes a stainless steel sleeve 6 The inner cavity is provided with an insulating centering mechanism, and the upper and lower ends of the insulating centering mechanism are respectively provided with an upper copper ring 12 and a lower oxygen-free copper ring 15, and an embedded copper heater 20 is sleeved and installed on the insulating centering mechanism, and a plurality of superconducting tape samples to be tested are evenly wound on the circumferential outer wall of the embedded copper heater 20, and the two ends of each superconducting tape sample to be tested are respectively welded and fixedly connected to the upper copper ring 12 and the lower oxygen-free copper ring 15.

[0035] Among them, when the superconducting tape sample to be tested is placed in a vacuum test environment in the vacuum chamber module, one current lead 1 is electrically connected to the upper copper ring 12 through the copper adapter 8, and the other current lead 1 is electrically connected to the lower oxygen-free copper ring 15 through the copper adapter 8, thereby forming a test current loop for the superconducting tape sample to be tested.

[0036] During the use of the quench characteristic test sample rod of the present application, a vacuum chamber module is arranged at the bottom end of the lead sleeve 5, so that a plurality of superconducting tape samples to be tested can be evenly wound and arranged on the circumferential outer wall of the embedded copper heater 20. The embedded copper heater 20 is supported and fixed by a heat-insulating centering mechanism. The heat-insulating centering mechanism is convenient for arranging an upper copper ring 12 and a lower oxygen-free copper ring 15 electrically connected to the superconducting tape sample to be tested. The upper copper ring 12 and the lower oxygen-free copper ring 15 are electrically connected to the current lead 1 through the corresponding copper adapter 8, so as to form a test current loop of the superconducting tape sample to be tested.

[0037] The vacuum chamber module in the present application can satisfy the requirements of sealing, heating and other behavioral characteristics of the superconducting tape sample to be tested in a liquid helium environment, and utilizes the indium pressure seal of the vacuum chamber module to provide a quasi-adiabatic working condition for testing, so that almost all of the energy emitted by the embedded copper heater 20 during the quench process is used to stimulate the quench of the superconducting tape sample to be tested, thereby being able to characterize the key parameters of the quench propagation characteristics of the superconducting tape, such as the minimum quench energy and the quench propagation velocity, reduce the heat exchange between the normal state region of the superconducting tape and the environment, and reduce the heat loss of the superconducting tape during the conduction process, thereby improving the accuracy of the test of the quench propagation characteristics of the superconducting tape.

[0038] It is important to understand that, combined with Figure 4 As shown, the embedded copper heater 20 has three pairs of leads for transmitting heating signals. During the use of the embedded copper heater 20, each pair of leads can be controlled by a temperature controller with a separate control loop, and the temperature controller with a separate control loop can be controlled according to the temperature feedback from the thermometer. The heat conducted during the heating process is monitored by a Cernox thermometer attached to the surface of the superconducting tape sample to be tested.

[0039] In this specific implementation mode, Figure 1 and Figure 3 As shown, the thermal insulation centering mechanism includes an upper copper ring 12 arranged in a copper drill sleeve 11, the copper drill sleeve 11 and the docking flange 10 are connected by indium pressure sealing, and the upper copper ring 12 is welded and fixedly connected to the bottom end of a copper adapter 8; the thermal insulation centering mechanism includes a lower oxygen-free copper ring 15 sleeved on a copper shaft 16, and the copper shaft 16 is welded and fixedly connected to the bottom end of another copper adapter 8; wherein, two stainless steel tubes 14 and an insulating partition 13 are arranged between the upper copper ring 12 and the copper shaft 16, the two stainless steel tubes are separated and spaced apart by the insulating partition 13, and the bottom end of the upper copper ring 12 is positioned in abutment with one stainless steel tube 14, and the top end of the copper shaft 16 is positioned in abutment with another stainless steel tube 14.

[0040] During the installation process of the heat-insulating centering mechanism of the present application, the upper copper ring 12 and the lower oxygen-free copper ring 15 are supported and positioned for installation, so that the upper copper ring 12 is respectively electrically connected to a copper adapter 8 and one end of the superconducting tape sample to be tested, and the lower oxygen-free copper ring 15 is respectively electrically connected to another copper adapter 8 and the other end of the superconducting tape sample to be tested. The upper copper ring 12 and the lower oxygen-free copper ring 15 are insulated and separated by an insulating partition 13 to ensure the test current loop design of the superconducting tape sample to be tested; the insulating partition 13 in the present application can be made of a G10 composite material synthesized by glass fiber cloth and epoxy resin, which is convenient for separating the stainless steel pipes 14 arranged on both sides and curing with Stycast black glue material, which can isolate the stainless steel pipes 14 at both ends from direct contact and play an insulating role. In addition, it cooperates with the stainless steel pipes 14 at both ends, has a certain mechanical strength, and ensures the stable installation performance.

[0041] In this specific implementation mode, Figure 1 and Figure 3 As shown, when the lower oxygen-free copper ring 15 is sleeved and connected with the copper shaft 16, a cross copper block 18 is set at the bottom end of the copper shaft 16 through the indium sheet to abut against it. The cross copper block 18 keeps the lower oxygen-free copper ring 15 and the copper shaft 16 fixedly connected by bolts, which can solve the problem of overheating caused by excessive contact resistance when power is turned on.

[0042] In this specific implementation mode, Figure 1 and Figure 3 As shown, the external coaxiality of the stainless steel tube 14 is provided with an insulating cylindrical tube 19, and is connected with the insulating cylindrical tube 19 by interference fit. The external coaxiality of the insulating cylindrical tube 19 is provided with an embedded copper heater 20, and a gap cavity is provided between the insulating cylindrical tube 19 and the embedded copper heater 20; wherein, an insulating centering ring 17 is provided in the gap cavity between the insulating cylindrical tube 19 and the embedded copper heater 20.

[0043] The stainless steel tube 14 in the present application is sequentially installed with an insulating cylindrical tube 19 and an embedded copper heater 20 on the outside, so that the embedded copper heater 20 can be conveniently and securely installed on the insulating centering mechanism, and the coaxiality of the embedded copper heater 20 can be ensured. The insulating cylindrical tube 19 and the insulating centering ring 17 can be made of polyimide film materials respectively. The insulating cylindrical tube 19 is arranged between the stainless steel tube 14 and the embedded copper heater 20, which can slow down the radiation heat transfer between the copper heater and the stainless steel support; in addition, the insulating centering ring 17 is arranged in the gap cavity between the insulating cylindrical tube 19 and the embedded copper heater 20, which has the function of supporting and positioning the installation, and can avoid direct electrode contact between the embedded heater and the upper copper ring 12 and the lower oxygen-free copper ring 15, which is both insulated and blocks heat transfer, thereby reducing the heat exchange between the normal state area of ​​the superconducting tape and the environment, and reducing the heat loss of the superconducting tape during the conduction process.

[0044] In this specific embodiment, the central axis of the embedded copper heater 20 is arranged to coincide with the central axis of the background magnet. When the superconducting tape samples to be tested are placed in the high magnetic field test environment of the background magnet, the test magnetic field strength to which multiple superconducting tape samples to be tested are subjected is uniform; the vacuum chamber module is placed in the high magnetic field test environment of the background magnet, which can improve the accuracy of the test of the quench propagation characteristics of the superconducting tape.

[0045] In this specific implementation mode, Figure 1 and Figure 2 As shown, a vacuum tube 3 is inserted into the top flange 4, a mounting clamp 2 is sleeved on the top of the vacuum tube 3 extending out of the lead sleeve, and the bottom end of the vacuum tube 3 passes through the docking flange 10 and extends into the inner cavity of the stainless steel sleeve 6; it is convenient to evacuate the inner cavity of the stainless steel sleeve 6 through the vacuum tube 3, so that the superconducting tape sample to be tested can achieve sealing, heating and other behavioral characteristics in a liquid helium environment, and the indium pressure seal of the vacuum chamber module is used to provide a quasi-adiabatic working condition for testing.

[0046] In this specific implementation mode, Figure 1 As shown, a sleeve fixing ring 7 is connected to the lead sleeve 5 by screws, and the sleeve fixing ring 7 is used to insert and connect the vacuum tube 3, and the sleeve fixing ring 7 is used to fix the two current leads 1 by a right-angle fixing block 9 to ensure that the vacuum tube 3 and the current lead 1 are stably installed.

[0047] In this specific embodiment, the copper adapter 8 is a copper guide rod. When the copper adapter 8 is welded and fixedly connected to the current lead 1, a superconducting tape is welded to the tail end of the current lead 1. The superconducting tape can be a Bi-2223 superconducting tape, which can reduce the heat generated by the current lead 1 during testing and provide a guarantee for the safety of the test system during testing.

[0048] In this specific embodiment, the hollow inner cavity of the lead sleeve 5 is a vacuum chamber. The present application can design the lead sleeve 5 to be vacuumed to facilitate helium infiltration to cool the device, thereby reducing the heat generated by the current lead 1 during testing.

[0049] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions, characterized in that: The invention comprises a lead sleeve (5) and a vacuum chamber module, wherein the bottom end of the lead sleeve (5) is detachably connected to the vacuum chamber module via a docking flange (10), and the top end is inserted and connected to two current leads (1) via a top flange (4); the inner cavity of a stainless steel sleeve (6) included in the vacuum chamber module is provided with a heat-insulating centering mechanism, the upper and lower ends of the heat-insulating centering mechanism are respectively provided with an upper copper ring (12) and a lower oxygen-free copper ring (15), and an embedded copper heater (20) is sleeved and installed on the heat-insulating centering mechanism, and a plurality of superconducting tape samples to be tested are evenly wound and arranged on the circumferential outer wall of the embedded copper heater (20), and the two ends of each superconducting tape sample to be tested are respectively welded and fixedly connected to the upper copper ring (12) and the lower oxygen-free copper ring (15); When the superconducting tape sample to be tested is placed in a vacuum test environment in the vacuum chamber module, one current lead (1) is electrically connected to the upper copper ring (12) through a copper adapter (8), and another current lead (1) is electrically connected to the lower oxygen-free copper ring (15) through a copper adapter (8).

2. The quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions according to claim 1, characterized in that: The heat-insulating centering mechanism comprises an upper copper ring (12) disposed in a copper drill sleeve (11), the copper drill sleeve (11) and the docking flange (10) being connected via an indium-pressed seal, and the upper copper ring (12) being fixedly connected by welding to the bottom end of a copper adapter (8); The heat-insulating centering mechanism comprises a lower oxygen-free copper ring (15) sleeved on a copper shaft (16), and the copper shaft (16) is fixedly connected to the bottom end of another copper adapter (8) by welding; Two stainless steel tubes (14) and an insulating partition (13) are arranged between the upper copper ring (12) and the copper shaft (16); the two stainless steel tubes are separated and spaced apart by the insulating partition (13); the bottom end of the upper copper ring (12) is in contact with one of the stainless steel tubes (14) and the top end of the copper shaft (16) is in contact with the other of the stainless steel tubes (14).

3. The quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions according to claim 2, characterized in that: When the lower oxygen-free copper ring (15) is sleeved and connected with the copper shaft (16), the bottom end of the copper shaft (16) is abutted against a cross copper block (18) via an indium sheet, and the cross copper block (18) keeps the lower oxygen-free copper ring (15) and the copper shaft (16) fixedly connected via bolts.

4. The quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions according to claim 2, characterized in that: The outer coaxiality of the stainless steel tube (14) is provided with an insulating cylindrical tube (19), and the insulating cylindrical tube (19) is connected with the insulating cylindrical tube (19) by interference fit; the outer coaxiality of the insulating cylindrical tube (19) is provided with an embedded copper heater (20), and a gap cavity is provided between the embedded copper heater (20); Wherein, an insulating centering ring (17) is arranged in the gap cavity between the insulating cylindrical tube (19) and the embedded copper heater (20).

5. The quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions according to claim 4, characterized in that: The central axis of the embedded copper heater (20) is arranged to coincide with the central axis of the background magnet, so that when the superconducting tape samples to be tested are placed in a high magnetic field test environment of the background magnet, the test magnetic field strength to which the multiple superconducting tape samples to be tested are subjected is uniform.

6. The quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions according to claim 1, characterized in that: The top flange (4) is connected with a vacuum tube (3), the top of the vacuum tube (3) extending out of the lead sleeve is sleeved with a mounting clamp (2), and the bottom end of the vacuum tube (3) passes through the docking flange (10) and extends into the inner cavity of the stainless steel sleeve (6).

7. The quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions according to claim 6, characterized in that: A sleeve fixing ring (7) is connected inside the lead sleeve (5) via screws. The sleeve fixing ring (7) is used for inserting and connecting the vacuum tube (3), and the sleeve fixing ring (7) is used to fix two current leads (1) by bundling them via a right-angle fixing block (9).

8. The quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic conditions according to claim 1, characterized in that: The copper transition device (8) is a copper guide rod. When the copper transition device (8) is fixedly connected to the current lead (1) by welding, a superconducting tape body is welded to the tail end of the current lead (1).

9. The quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions according to claim 1, characterized in that: The hollow inner cavity of the lead sleeve (5) is a vacuum cavity.

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