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CN-121972787-A - Superconducting tape connects integrative equipment of welding test

CN121972787ACN 121972787 ACN121972787 ACN 121972787ACN-121972787-A

Abstract

The invention relates to the technical field of superconducting strips and discloses integrated equipment for welding and testing a superconducting strip joint, which comprises a welding assembly, a driving and pressurizing mechanism, an electric testing assembly and a testing container mechanism, wherein the welding assembly comprises an upper die and a lower die which are oppositely arranged, the driving and pressurizing mechanism is used for applying welding pressure to the upper die and/or the lower die in the welding process, the electric testing assembly comprises at least four pairs of lead terminals, at least two pairs of lead terminals are respectively arranged on two sides of the lower die, the pairs of lead terminals are suitable for being respectively clamped and arranged on two sides of the strip, and the testing container mechanism comprises a lifting assembly and a container body. Through setting up drive pressurizing mechanism in equipment top to dispose liftable test container mechanism in equipment below, the pressure executive component can be after the welding is accomplished initiatively step down, need not the secondary clamping after the welding and can realize the normal position test to the strip, thoroughly avoid the fragile superconductive layer damage that the strip shifts and repeated clamping probably causes in the conventional art.

Inventors

  • WANG WEI
  • YIN YUANYUAN
  • XIN JIJUN

Assignees

  • 松山湖材料实验室
  • 中色创新研究院(天津)有限公司

Dates

Publication Date
20260505
Application Date
20251212

Claims (13)

  1. 1. A superconducting tape joint welding test integrated apparatus, comprising: the welding assembly (1) comprises an upper die (101) and a lower die (102) which are oppositely arranged, a cavity for accommodating a strip to be welded is formed between the upper die (101) and the lower die (102), and the upper die (101) and/or the lower die (102) are/is provided with a heating element; A driving pressurizing mechanism (2) for applying welding pressure to the upper die and/or the lower die during welding; The electrical testing assembly (3) comprises at least four pairs of lead terminals, wherein at least two pairs of lead terminals are respectively arranged on two sides of the lower die (102) along the length direction of the strip, and the lead terminals in the pairs are suitable for being respectively clamped on two sides of the superconducting strip so as to perform joint electrical testing on the two side surfaces of the welded superconducting strip by adopting a double-sided four-lead method; A test receptacle mechanism (4) comprising a lifting assembly and a receptacle body (404), the lifting assembly being adapted to drive the receptacle body (404) towards or away from the electrical test assembly (3), the receptacle body (404) having a test state in which the electrical test assembly (3) is fully received in an interior cavity of the receptacle body (404), and a standby state fully separated from the receptacle body (404).
  2. 2. The integrated superconducting tape joint welding test apparatus of claim 1 wherein said lifting assembly comprises: A lifting drive member (401) fixedly arranged; The transmission assembly comprises a guide piece (402), a transmission screw rod and a matching nut, wherein the guide piece (402) is fixedly arranged, the transmission screw rod extends parallel to the guide piece (402), the transmission screw rod is arranged on an output shaft of the lifting driving piece (401) in a transmission mode, the matching nut is in threaded matching with the transmission screw rod, the matching nut is in sliding matching with the guide piece (402), and the container body (404) is fixedly arranged on the matching nut.
  3. 3. The integrated superconducting tape joint welding test equipment according to claim 2, wherein the output shaft of the lifting drive member (401) is coaxially connected with the transmission screw rod through a coupling (403).
  4. 4. A superconducting tape joint welding test integration apparatus according to any one of claims 1 to 3, wherein the container body (404) is an open topped dewar, the container body (404) being raised such that its open end is not below the upper surface of the electrical test assembly (3) when the container body (404) is in the test condition.
  5. 5. The integrated superconducting tape joint welding test apparatus of claim 4 wherein said open end of said container body (404) is movably provided with Du Wagai (405), said Du Wagai (405) cooperating with said open end of said container body (404) to close said open end of said container body (404) when said container body (404) is in said test condition.
  6. 6. A superconducting tape joint welding test integrated apparatus according to any one of claims 1 to 3, wherein a drain hole is provided in the bottom of the container body (404), and an on-off control valve (406) is installed at the drain hole.
  7. 7. A superconducting tape joint welding test integrated apparatus according to any one of claims 1 to 3, further comprising a support mounting assembly (5) having a table (501) mounted thereon in a hoisted manner, the welding assembly (1) and the electrical test assembly (3) being mounted on the table (501), an insulating spacer (308) being mounted between the electrical test assembly (3) and the table (501).
  8. 8. The integrated superconducting tape joint welding test apparatus according to claim 7, wherein the drive pressurizing mechanism (2) includes a drive assembly and a pressure actuator, the drive assembly being mounted upside down on the support mounting assembly (5), the pressure actuator being arranged toward the upper die (101), the drive assembly being adapted to drive the pressure actuator to move toward or away from the upper die (101) so that the pressure actuator has a welding state of abutting against the upper die (101) to apply welding pressure to the upper die (101), and a standby state of being completely separated from the upper die (101).
  9. 9. The superconducting tape joint welding test integration apparatus of claim 8 wherein the drive assembly comprises: A welding drive (201) fixedly mounted on the support mounting assembly (5); The linkage assembly comprises a linkage screw rod, an auxiliary nut and a guide piece, wherein the guide piece is fixedly installed on the support installation assembly (5), the linkage screw rod extends parallel to the guide piece, the linkage screw rod is installed on an output shaft of the welding driving piece (201) in a transmission mode, the auxiliary nut is in threaded fit with the linkage screw rod, the auxiliary nut is in sliding fit with the guide piece, and the pressure executing piece is installed at one end, far away from the welding driving piece (201), of the linkage screw rod.
  10. 10. The integrated superconducting tape joint welding test apparatus of claim 9, wherein the pressure actuator is a universal floating ram (202), and a pressure sensor (203) is mounted between the pressure actuator and the linkage screw.
  11. 11. A superconducting tape joint welding test integration apparatus according to any one of claims 1 to 3, wherein an insulating spacer (305) is provided on one of the pair of lead terminals, the insulating spacer (305) being provided with a test notch in which a tape is adapted to be mounted.
  12. 12. A superconducting tape joint welding test integrated apparatus according to any one of claims 1 to 3, wherein at least two pairs of said lead terminals located on the same side of said lower die (102) comprise at least one pair of voltage lead terminals and one pair of current lead terminals.
  13. 13. The integrated superconducting tape joint welding test apparatus according to claim 12, wherein two current lead terminals located on both sides of the lower die (102) on the same side of the superconducting tape are connected to a current source so that current flows into the upper surface and/or the lower surface of the superconducting tape; Two voltage lead terminals positioned on two sides of the lower die (102) on the same surface of the superconducting tape are respectively connected to the anode and the cathode of the nanovoltmeter so as to record the voltage of the upper surface and/or the lower surface of the superconducting tape.

Description

Superconducting tape connects integrative equipment of welding test Technical Field The invention relates to the technical field of superconducting strips, in particular to a welding and testing integrated device for a superconducting strip joint. Background The superconducting tape technology is used as the core development direction of the second generation superconducting material, and has great application potential in the fields of power transmission, magnetic confinement nuclear fusion, particle accelerator, nuclear magnetic resonance imaging, superconducting energy storage and the like. Along with the continuous maturity of the industrialized preparation technology of coated conductors such as Yttrium Barium Copper Oxide (YBCO), the mass production of kilometer-grade long strips is realized. However, due to the complicated multi-layer structure manufacturing process and equipment tension control precision of the coated conductor, the actual finished product length of a single strip still cannot meet the continuous winding requirement of a large superconducting magnet, for example, a single crystal silicon high temperature superconducting magnet often needs continuous conductors of several kilometers or even tens of kilometers. Therefore, reliable joint technology must be adopted to realize the segmented connection between strips in the process of winding superconducting coils, and the critical current and contact resistance of the joint determine the current carrying capacity and stability of the whole superconducting system. In the prior art, various low-melting-point metal solder welding equipment for superconducting tapes generally has heating, pressurizing and cooling functions so as to realize the regulation and control of parameters such as welding temperature, pressure and the like. However, after the welding equipment completes the joint welding of the superconducting tape, the tape together with the joint is moved to a separate testing apparatus for electrical property measurement. The electrical property measurement process needs to disassemble, carry and clamp the welded strip, so that the operation is complex, the efficiency is low, mechanical damage to the fragile superconducting strip is easy to occur due to improper stress or bending, and the reliability of the joint and even the whole device is affected. Disclosure of Invention The invention provides a superconducting tape joint welding and testing integrated device, which aims to solve the problem that in the prior art, a superconducting tape is easy to be mechanically damaged when a joint is tested after the joint is welded. In a first aspect, the present invention provides a superconducting tape joint welding test integrated apparatus comprising: the welding assembly comprises an upper die and a lower die which are oppositely arranged, a cavity for accommodating a strip to be welded is formed between the upper die and the lower die, and a heating element is arranged in the upper die and/or the lower die; The driving pressurizing mechanism is used for applying welding pressure to the upper die and/or the lower die in the welding process; The electrical testing assembly comprises at least four pairs of lead terminals, wherein the at least four pairs of lead terminals are configured to be respectively arranged on two sides of the lower die along the length direction of the superconducting tape, and the pairs of lead terminals are suitable for being respectively clamped on two sides of the superconducting tape so as to perform joint electrical testing on two side surfaces of the welded superconducting tape by adopting a double-sided four-lead method; and a test container mechanism comprising a lifting assembly and a container body, the lifting assembly being adapted to drive the container body towards or away from the electrical test assembly, the container body having a test state in which the electrical test assembly is fully received in the interior cavity of the container body, and a standby state fully separated from the container body. The integrated device for welding and testing the superconducting tape joint realizes the sequential execution of welding and testing procedures at the same station through the integrated design of space coupling. The electric test components are always arranged on two sides of the lower die, and when in welding, the strip to be welded is arranged in a cavity of the lower die, and simultaneously, the front and back sides of the strip to be welded to be measured are clamped by paired lead terminals in the electric test components arranged on two sides of the lower die so as to be fixed in an auxiliary manner. The upper die is then placed over the lower die such that the upper and lower dies sandwich the strip to be welded. The pressurizing mechanism is driven to drive the pressure executing piece to move downwards to enter a welding state, pressure is applied to the upper die, so that the upper die