A sample rod for testing quench characteristics suitable for high magnetic fields and quasi-adiabatic conditions

Abstract

The application discloses a quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working conditions, which comprises a lead sleeve and a vacuum cavity module, the bottom end of the lead sleeve is detachably connected with the vacuum cavity module through a butt flange, the vacuum cavity module comprises a heat insulation centering mechanism arranged in an inner cavity, the upper and lower ends of the heat insulation centering mechanism are respectively provided with an upper copper ring and a lower oxygen-free copper ring, and an embedded copper heater is sleeved on the heat insulation centering mechanism, a plurality of superconducting tape samples to be tested are uniformly and circumferentially arranged on the outer wall of the embedded copper heater, and the 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. The application utilizes the indium compression sealing of the vacuum cavity module to provide quasi-adiabatic working conditions for testing, can reduce the heat exchange between the normal state region of the superconducting tape and the environment, reduce the heat loss of the superconducting tape in the conduction process, and thus improves the accuracy of the quench propagation characteristic test of the superconducting tape.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of quench characteristic testing, and particularly relates to a quench characteristic testing sample rod suitable for high magnetic field and quasi-adiabatic working conditions. BACKGROUND

[0002] In recent years, with the continuous development of material forming and preparation technology, high-temperature superconducting materials are favored by people due to their superior current-carrying capacity, and their applications are becoming more and more widespread. However, it is inevitable to encounter sudden failures in the operation of high-temperature superconducting power equipment, such as system short circuit. At this time, the superconducting material bears the short-circuit large current and the electromagnetic, mechanical stress and thermal disturbance generated thereby, which may cause quench. Moreover, the current of the power equipment can reach several thousand amperes or higher, and the occurrence of quench without taking safety measures will bring incalculable loss.

[0003] Traditional sample rods are mostly used to detect the critical performance of superconducting tapes after external influence, and cannot simulate quasi-adiabatic environment, nor can they characterize the key parameters of superconducting tape quench propagation characteristics, such as minimum quench energy and quench propagation speed. Moreover, in an ideal case, all the heat generated by the quench heater embedded in the superconducting tape should only be used to drive the normal state region of the superconducting tape to propagate, but in the traditional sample rod experiment process, the 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 working conditions can create a "quasi-adiabatic" experimental environment, reduce the heat transfer of the normal state region of the superconducting tape to the environment, and improve the accuracy of the experiment. Therefore, it is necessary to design a sample rod for quasi-adiabatic working conditions for the accuracy of detecting the quench propagation characteristics of superconducting tapes. SUMMARY

[0005] The present application relates to the technical field of quench characteristic testing, and particularly relates to a quench characteristic testing sample rod suitable for high magnetic field and quasi-adiabatic working conditions.

[0006] The purpose of the present application can be achieved by the following technical solutions:

[0007] A quench characteristic test sample rod suitable for high magnetic field and quasi-adiabatic working condition, comprising 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, the top opening end is connected with two current leads through a top flange, the vacuum cavity module comprises a heat insulation centering mechanism arranged in the inner cavity of a stainless steel sleeve, the upper and lower ends of the heat insulation centering mechanism are respectively provided with an upper copper ring and a lower oxygen-free copper ring, and an embedded copper heater is sleeved and mounted on the heat insulation centering mechanism, a plurality of superconducting tape samples to be tested are uniformly and circumferentially arranged on the circumferential outer wall of the embedded copper heater, and the 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.

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

[0009] As a further scheme of the present application, the upper copper ring of the heat insulation centering mechanism is arranged in a copper drill sleeve, the copper drill sleeve is sealingly connected with the butt flange through indium pressing, and the bottom end of the copper adapter is welded and fixedly connected with the upper copper ring.

[0010] The lower oxygen-free copper ring of the heat insulation centering mechanism is sleeved on a copper shaft, and the bottom end of the copper shaft is welded and fixedly connected with the other copper adapter.

[0011] Two stainless steel pipes and an insulating partition plate are arranged between the upper copper ring and the copper shaft, the two stainless steel pipes are arranged in spaced apart relation by the insulating partition plate, the bottom end of the upper copper ring is positioned in abutment with one of the stainless steel pipes, and the top end of the copper shaft is positioned in abutment with the other stainless steel pipe.

[0012] As a further scheme of the present application, when the lower oxygen-free copper ring is sleeved and connected with the copper shaft, the bottom end of the copper shaft is positioned in abutment with a cross-shaped copper block through an indium sheet, and the cross-shaped copper block is fixedly connected with the lower oxygen-free copper ring and the copper shaft through bolts.

[0013] As a further scheme of the present application, the outer coaxiality of the stainless steel pipe is provided with an insulating cylindrical pipe, and the insulating cylindrical pipe is connected with the insulating cylindrical pipe in interference fit, the outer coaxiality of the insulating cylindrical pipe is provided with an embedded copper heater, and the insulating cylindrical pipe and the embedded copper heater have a gap cavity therebetween.

[0014] An insulating centering ring is arranged in the gap cavity between the insulating cylindrical pipe and the embedded copper heater.

[0015] As a further scheme of the present application: the middle axis of the embedded copper heater is arranged to coincide with the middle axis of the background magnet, so that 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 received by the plurality of superconducting tape samples to be tested is uniform and consistent.

[0016] As a further scheme of the present application: a vacuum extraction pipe is inserted and connected on the top flange, the vacuum extraction pipe is sleeved and mounted on the top end of the lead sleeve with a mounting clamp, and the bottom end of the vacuum extraction pipe penetrates through the butt flange and extends into the inner cavity of the stainless steel sleeve.

[0017] As a further scheme of the present application: a sleeve fixing ring is connected by screws in the lead sleeve, the sleeve fixing ring is used for inserting and connecting a vacuum extraction pipe, and the sleeve fixing ring is fixed by a right-angle fixing block to bundle two current leads.

[0018] As a further scheme of the present application: the copper adapter is a copper guide rod, when the copper adapter is fixedly connected with the current lead by welding, the tail end of the current lead is welded with a superconducting tape body.

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

[0020] The beneficial effects of the present application are:

[0021] (1) The vacuum cavity module in the present application can meet the sealing, heating and other behavior characteristics of the superconducting tape samples to be tested in the liquid helium environment, and can provide quasi-adiabatic working conditions for testing by using the indium sealing of the vacuum cavity module, so that almost all the energy emitted by the embedded copper heater in the superconducting propagation process is used to excite the superconducting tape samples to be tested, thereby the key parameters of the superconducting tape propagation characteristics, such as the minimum superconducting energy and the superconducting propagation speed, can be used to characterize, the heat exchange between the normal state region of the superconducting tape and the environment is reduced, the heat loss in the conduction process of the superconducting tape is reduced, and the accuracy of the superconducting tape propagation characteristic test is improved.

[0022] (2) In the installation process of the heat insulation centering mechanism, 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 plate, so as to ensure the test current loop design of the superconducting tape samples to be tested, and the stability of the heat insulation centering mechanism installation can be ensured.

[0023] (3) The stainless steel pipe in the present application is externally installed with an insulating cylindrical pipe and an embedded copper heater in sequence, so that the embedded copper heater is installed above the insulating centering mechanism conveniently and firmly, the radiation heat transfer between the copper heater and the stainless steel support can be reduced, in addition, the middle axis of the embedded copper heater is arranged to coincide with the middle axis of the background magnet, which can improve the accuracy of the superconducting tape propagation characteristic test.

[0024] (4) The tail end of the current lead is welded to the superconducting ribbon in the lead sleeve, which can reduce the heat generated by the current lead during testing, and provides safety for the testing system during testing. In addition, the hollow inner cavity of the lead sleeve is designed as a vacuum cavity to facilitate the infiltration of helium gas to cool the device and reduce the heat generated by the current lead during testing. BRIEF DESCRIPTION OF DRAWINGS

[0025] The application will be further described below with reference to the accompanying drawings.

[0026] Figure 1 is a structural schematic diagram of the application;

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

[0028] Figure 3 is an exploded schematic diagram of the vacuum cavity module of the application;

[0029] Figure 4 is a structural schematic diagram of the embedded heater of the application;

[0030] Figure 5 is a structural schematic diagram of the stainless steel sleeve included in the vacuum cavity module of the application.

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

[0032] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0033] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; In the description of the present application, the meaning of "a plurality of" "several" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0034] Please refer to Figures 1 to 5 As shown in the drawings, the present application is a kind of sample rod for testing quenching characteristics suitable for high magnetic field and quasi-adiabatic working condition, including lead sleeve 5 and vacuum cavity module, the bottom end of lead sleeve 5 is detachably connected to vacuum cavity module through butt flange 10, the top end is inserted and connected to two current leads 1 through top flange 4, the vacuum cavity module includes a heat insulation centering mechanism arranged in the inner cavity of stainless steel sleeve 6, the upper and lower ends of the heat insulation centering mechanism are respectively provided with upper copper ring 12 and lower oxygen-free copper ring 15, and embedded copper heater 20 is installed on the heat insulation centering mechanism, a plurality of superconducting tape samples to be tested are uniformly wound on the circumferential outer wall of embedded copper heater 20, and the two ends of each superconducting tape sample to be tested are respectively welded and fixedly connected with the upper copper ring 12 and the lower oxygen-free copper ring 15.

[0035] Wherein, when the superconducting tape sample to be tested is placed in the vacuum test environment in the vacuum cavity module, one current lead 1 is electrically connected with the upper copper ring 12 through the copper adapter 8, and the other current lead 1 is electrically connected with the lower oxygen-free copper ring 15 through the copper adapter 8, so as to form a test current loop of the superconducting tape sample to be tested.

[0036] In the use process of the quenching characteristic test sample rod of the present application, the vacuum cavity module is arranged at the bottom end of the lead sleeve 5, so as to uniformly wind a plurality of superconducting tape samples to be tested on the circumferential outer wall of the embedded copper heater 20, the embedded copper heater 20 is supported and fixed by the heat insulation centering mechanism, the upper copper ring 12 and the lower oxygen-free copper ring 15 electrically connected with the superconducting tape sample to be tested are arranged on the heat insulation centering mechanism, the upper copper ring 12 and the lower oxygen-free copper ring 15 are electrically connected with 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 cavity module in the present application can meet the behavior characteristics of sealing, heating, etc. of the superconducting tape sample to be tested in the liquid helium environment, and the quasi-adiabatic working condition is provided by the indium sealing of the vacuum cavity module to test, so that the energy emitted by the embedded copper heater 20 in the quench process is almost all used to excite the quench of the superconducting tape sample to be tested, so that the key parameters of the quench propagation characteristics of the superconducting tape, such as the minimum quench energy and the quench propagation speed, can be used to characterize the superconducting tape, reduce the heat exchange between the normal state region of the superconducting tape and the environment, reduce the heat loss of the superconducting tape in the conduction process, and improve the accuracy of the quench propagation characteristic test of the superconducting tape.

[0038] It should be understood that, in combination with Figure 4 As shown, there are three pairs of lead wires for propagating the heating signal, and each pair of lead wires can be controlled by a temperature controller with a separate control loop during the use of the embedded copper heater 20, and the temperature controller with a separate control loop can be controlled according to the temperature feedback of the thermometer. The heat conducted during the heating process is monitored by the Cernox thermometer pasted on the surface of the superconducting tape sample to be tested.

[0039] In the present embodiment, as shown in Figure 1 and Figure 3 The upper copper ring 12 of the heat insulation centering mechanism is arranged in the copper drill sleeve 11, and the copper drill sleeve 11 is connected with the butt flange 10 through an indium sealing connection. The upper copper ring 12 is fixedly connected with the bottom end of one copper adapter 8 through welding. The lower oxygen-free copper ring 15 of the heat insulation centering mechanism is sleeved on the copper shaft 16, and the copper shaft 16 is fixedly connected with the bottom end of the other copper adapter 8 through welding. The upper copper ring 12 and the copper shaft 16 are provided with two stainless steel pipes 14 and an insulating partition plate 13. The two stainless steel pipes are arranged in a spaced-apart manner through the insulating partition plate 13. The bottom end of the upper copper ring 12 is positioned in abutment with one stainless steel pipe 14, and the top end of the copper shaft 16 is positioned in abutment with the other stainless steel pipe 14.

[0040] In the installation process of the heat insulation centering mechanism of the 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 electrically conductive connected with one copper adapter 8 and one end of the superconducting tape sample to be tested respectively, and the lower oxygen-free copper ring 15 is electrically conductive connected with the other copper adapter 8 and the other end of the superconducting tape sample to be tested respectively, and the upper copper ring 12 and the lower oxygen-free copper ring 15 are insulated and separated by the insulating partition plate 13 to ensure the test current loop design of the superconducting tape sample to be tested. The insulating partition plate 13 in the application can be made of G10 composite material synthesized by glass fiber cloth and epoxy resin, which can separate the two stainless steel pipes 14 and solidify by Stycast black glue material, so as to prevent the two ends of the stainless steel pipe 14 from directly contacting, play the role of insulation, and in addition, it has a certain mechanical strength in cooperation with the two ends of the stainless steel pipe 14, which ensures the installation stability.

[0041] In the specific embodiment, as shown in Figure 1 and Figure 3 , when the lower oxygen-free copper ring 15 is connected with the copper shaft 16, the bottom end of the copper shaft 16 is abutted by the indium sheet to set the cross copper block 18, and the cross copper block 18 fixes and connects the lower oxygen-free copper ring 15 and the copper shaft 16 by bolts, which can solve the problem of overheating caused by excessive contact resistance during power supply.

[0042] In the specific embodiment, as shown in Figure 1 and Figure 3 , the outer coaxiality of the stainless steel pipe 14 is provided with the insulating cylindrical pipe 19, and the insulating cylindrical pipe 19 is connected with the insulating cylindrical pipe 19 in interference fit, and the insulating cylindrical pipe 19 is provided with the embedded copper heater 20 outside the coaxiality, and has a gap cavity between the embedded copper heater 20; wherein the gap cavity between the insulating cylindrical pipe 19 and the embedded copper heater 20 is provided with the insulating centering ring 17.

[0043] The insulating cylindrical pipe 19 and the embedded copper heater 20 are sequentially installed outside the stainless steel pipe 14 in the application, so that the embedded copper heater 20 is installed above the insulating centering mechanism conveniently and firmly, and the coaxiality of the embedded copper heater 20 is ensured, and the insulating cylindrical pipe 19 and the insulating centering ring 17 can be made of polyimide film material respectively, the insulating cylindrical pipe 19 is arranged between the stainless steel pipe 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 arranged in the gap cavity between the insulating cylindrical pipe 19 and the embedded copper heater 20 has the effect of supporting and positioning installation, and can avoid the direct electrode contact between the embedded heater and the upper copper ring 12 and the lower oxygen-free copper ring 15, which not only insulates but also blocks the heat transfer, thereby reducing the heat exchange between the normal state region of the superconducting tape and the environment and reducing the heat loss of the superconducting tape in the conduction process.

[0044] In the specific embodiment, 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 the high magnetic field test environment of the background magnet, the test magnetic field strength received by the plurality of superconducting tape samples to be tested is uniform; the vacuum cavity module is placed in the high magnetic field test environment of the background magnet, which can improve the accuracy of the superconducting tape quench propagation characteristic test.

[0045] In the specific embodiment, as shown in Figure 1 and Figure 2 , the top flange 4 is inserted with a connection vacuum pipe 3, the vacuum pipe 3 is sleeved and mounted with a mounting clamp 2 on the top end of the lead sleeve, and the bottom end of the vacuum pipe 3 penetrates through the butt flange 10 and extends into the inner cavity of the stainless steel sleeve 6; the inner cavity of the stainless steel sleeve 6 can be easily vacuumized through the vacuum pipe 3, so that the behavior characteristics of the superconducting tape samples to be tested in the liquid helium environment can be realized, such as sealing and heating, and the vacuum cavity module can be used to provide quasi-adiabatic conditions for testing by using indium sealing.

[0046] In the specific embodiment, as shown in Figure 1 , a sleeve fixing ring 7 is connected in the lead sleeve 5 by a screw, the sleeve fixing ring 7 is used to insert and connect the vacuum pipe 3, and the sleeve fixing ring 7 is fixed by a right-angle fixing block 9 to bundle two current leads 1, so that the vacuum pipe 3 and the current leads 1 are stably installed.

[0047] In the specific embodiment, the copper adapter 8 is a copper guide rod, when the copper adapter 8 is welded and fixedly connected with the current leads 1, the tail end of the current leads 1 is welded with a superconducting tape body, the superconducting tape body can be a Bi-2223 superconducting tape, which can reduce the heat generated by the current leads 1 during testing, and provides a guarantee for the safety of the testing system during testing.

[0048] In the specific embodiment, the hollow inner cavity of the lead sleeve 5 is a vacuum cavity, the lead sleeve 5 can be designed to be vacuumized, so that helium gas can penetrate into the device to cool it, thereby reducing the heat generated by the current leads 1 during testing.

[0049] The above describes one embodiment of the present application in detail, but the content described is only the preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still be included in the patent scope of the present application.

Claims

1. A test sample rod for quench characteristic testing suitable for high magnetic fields and quasi-adiabatic conditions, characterized by, The utility model provides a kind of vacuum test device for superconducting tape, including lead sleeve (5) and vacuum cavity module, the bottom end of the lead sleeve (5) is detachably connected by butt flange (10) the vacuum cavity module, top end is insertedly connected two electric current leads (1) by top flange (4), the vacuum cavity module includes the inner cavity of stainless steel sleeve (6) is provided with heat insulation centering mechanism, the upper copper ring (12) and lower oxygen-free copper ring (15) are respectively arranged in the upper and lower ends of the heat insulation centering mechanism, and embedded copper heater (20) is installed on the heat insulation centering mechanism, the circumferential outer wall of the embedded copper heater (20) is uniformly distributed and arranged multiple superconducting tape samples to be tested, and the two ends of each superconducting tape sample to be tested are respectively welded and fixedly connected with the upper copper ring (12) and the lower oxygen-free copper ring (15); Wherein, when the superconducting tape sample to be tested is placed in the vacuum test environment in the vacuum cavity module, one of the electric current leads (1) is electrically conductive connected with the upper copper ring (12) by copper adapter (8), and the other electric current lead (1) is electrically conductive connected with the lower oxygen-free copper ring (15) by copper adapter (8).

2. A test sample rod for quench characteristic testing suitable for high magnetic field and quasi-adiabatic conditions according to claim 1, characterized in that, The upper copper ring (12) of the heat insulation centering mechanism is arranged in copper drill sleeve (11), the copper drill sleeve (11) is sealingly connected between the butt flange (10), and the upper copper ring (12) is welded and fixedly connected with the bottom end of one of the copper adapter (8). The lower oxygen-free copper ring (15) of the heat insulation centering mechanism is sleeved on the copper shaft (16), and the copper shaft (16) is welded and fixedly connected with the bottom end of the other copper adapter (8). Wherein, the upper copper ring (12) and the copper shaft (16) are provided with two stainless steel pipes (14) and an insulating partition (13), the two stainless steel pipes are spaced apart by the insulating partition (13), and the bottom end of the upper copper ring (12) is positioned against one of the stainless steel pipes (14), and the top end of the copper shaft (16) is positioned against the other stainless steel pipe (14).

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

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

5. A test sample rod for quench characteristic testing suitable for high magnetic field and quasi-adiabatic conditions according to claim 4, characterized in that, The center axis of the embedded copper heater (20) is arranged coincident with the center 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 received by the plurality of superconducting tape samples to be tested is uniform.

6. A test sample rod for quench characteristic testing suitable for high magnetic field and quasi-adiabatic conditions according to claim 1, wherein, The top flange (4) is inserted with a vacuum extraction pipe (3), the vacuum extraction pipe (3) extends out of the top end of the lead sleeve and is sleeved with a mounting clamp (2), the bottom end of the vacuum extraction pipe (3) penetrates through the butt flange (10) and extends into the inner cavity of the stainless steel sleeve (6).

7. A test sample rod for quench characteristic testing suitable for high magnetic field and quasi-adiabatic conditions according to claim 6, characterized in that, The lead sleeve (5) is connected with a sleeve fixing ring (7) through a screw, the sleeve fixing ring (7) is used for inserting the vacuum extraction pipe (3), and the sleeve fixing ring (7) is used for fixing two current leads (1) through a right-angle fixing block (9).

8. The test sample rod for quench characteristic suitable for high magnetic field and quasi-adiabatic condition according to claim 1, wherein, The copper switching device (8) is a copper guide rod, and when the copper switching device (8) is welded and fixedly connected with the current lead (1), the tail end of the current lead (1) is welded with a superconducting tape body.

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

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