A multi-layer high temperature superconducting tape welding device

Abstract

This application discloses a welding device for multilayer high-temperature superconducting tapes. The device includes an operating box, a heating assembly, a thermally conductive positioning assembly, a clamping assembly, and a joint assembly. The thermally conductive positioning assembly is configured to uniformly conduct the heat generated by the heating assembly. The clamping assembly is used to position and clamp the high-temperature superconducting tape to be welded. The joint assembly includes a first joint and a second joint arranged opposite to each other, and a support platform disposed between the first and second joints. Multiple sets of welding positioning grooves are provided on both the first and second joints. The multiple welding positioning grooves in each set on each joint are arranged in a stepped shape. The welding positioning grooves and the support platform together accommodate the high-temperature superconducting tape to be welded, thereby forming a stepped structure at the end of the multilayer high-temperature superconducting tape and achieving synchronous welding. This device, by setting up a joint with stepped welding positioning grooves and a thermally conductive assembly, ensures the uniformity of the welding and the tightness of the welded surface.

Description

Technical Field

[0001] This application relates to the field of superconducting material processing equipment technology, and in particular to a multilayer high-temperature superconducting strip welding device. Background Technology

[0002] In the design of superconducting magnets, the design and fabrication of high-temperature superconducting current leads are among the most challenging aspects. Due to the limited current-carrying capacity of a single high-temperature superconducting current lead, when a higher current is required, multiple current leads are bonded and welded together to obtain a current lead with a higher current-carrying capacity.

[0003] However, in actual welding, if multiple current leads are welded using ordinary methods, aligning their ends and arranging them for welding, the resulting current leads will have flush ends. However, due to the limitations of the front contact surface, the current will enter the current lead from a single point on the end face, then spread within the current lead, and finally pass through the current lead. This flow pattern means that although the current carrying capacity of the current lead is improved, it does not reach its critical value in actual testing. Therefore, in the design stage, before welding multiple current leads together, the ends are modified to be stepped. This allows the current to enter the current lead from different surfaces, improving the current flow effect. However, this stepped welding method is extremely difficult with current welding procedures, making it difficult to guarantee the symmetry and welding tightness after multi-layer stacking. It is also difficult to process, and errors caused by operation are almost irreversible, resulting in extremely poor economic efficiency. Meanwhile, because welding multiple strips requires layer-by-layer tinning and hot soldering, when welding the next layer after the previous one or several strips have been welded together, the tin on the lower strips will melt due to heat conduction. If not handled properly, this can easily lead to tin loss, air bubbles, and other problems. Compared to welding two strips, the welding difficulty is increased exponentially.

[0004] Therefore, there is an urgent need in this field to develop a multilayer high-temperature superconducting strip welding device. This device, by setting a joint with a stepped welding positioning groove and a heat-conducting component, ensures the uniformity of welding and the tightness of the welded material, and avoids uneven welding and strip size misalignment caused by manual operation. Summary of the Invention

[0005] The purpose of this application is to provide a multilayer high-temperature superconducting strip welding device. This device ensures the uniformity of welding and the tightness of the weld by setting a joint with a stepped welding positioning groove and a heat-conducting component, and avoids uneven welding and strip size misalignment caused by manual operation.

[0006] This application provides a multilayer high-temperature superconducting tape welding device, comprising: An operating box configured to provide a sealed welding environment; A heating assembly, disposed within the operating box and configured to provide the heat required for welding; A thermally conductive positioning component is disposed inside the heating component and configured to uniformly conduct the heat generated by the heating component; Clamping assembly for positioning and clamping high-temperature superconducting tape to be welded; A connector assembly is disposed in the space formed by the clamping assembly. The connector assembly includes a first connector and a second connector disposed opposite to each other, and a support platform disposed between the first connector and the second connector. Both the first connector and the second connector are provided with multiple sets of welding positioning grooves. The multiple welding positioning grooves in each set on each connector are stepped. The welding positioning grooves on the first connector and the second connector, together with the support platform, are used to accommodate the high-temperature superconducting tape to be welded, thereby forming a stepped structure at the end of the multilayer high-temperature superconducting tape and realizing synchronous welding.

[0007] In another preferred embodiment, the first connector and the second connector have the same structure.

[0008] In another preferred embodiment, the first joint has a generally cuboid main body extending along a longitudinal axis (X). The main body has recessed weld positioning grooves formed on its surface. The weld positioning grooves in each group are arranged sequentially in a direction parallel to the longitudinal axis (X), and the depth of the weld positioning grooves in each group gradually increases or decreases from one end of the main body to the other end, so that the surface of the main body has a set of stepped planes that rise or fall sequentially.

[0009] In another preferred embodiment, each of the welding positioning grooves is itself an elongated groove, preferably rectangular or trapezoidal in cross-section, and is configured to accommodate and precisely position the end of one or more layers of high-temperature superconducting tape.

[0010] In another preferred embodiment, the width of the welding positioning groove matches the width of the one or more layers of high-temperature superconducting tape.

[0011] In another preferred embodiment, the bottom surfaces of the multiple welding positioning grooves in each group, which are stepped, are located at different heights, so that when multiple strips of different lengths are placed therein, the ends of the multiple strips can collectively form an integral stepped end face.

[0012] In another preferred embodiment, the upper surface of the main body of the first joint is recessed downward to form two sets of parallel welding positioning grooves spaced at a certain distance, and the lower surface of the main body of the first joint is recessed upward in the direction toward the upper surface to form two sets of parallel welding positioning grooves spaced at a certain distance.

[0013] In another preferred embodiment, the first connector further includes a connecting portion extending outward from the side of the main body along the longitudinal axis (X), the connecting portion being connected to the support platform.

[0014] In another preferred embodiment, the connecting portion is cylindrical. This cylindrical connecting portion is configured for a detachable or fixed connection with the support platform, for example, by insertion fitting, threaded connection, or pin fixation.

[0015] In another preferred embodiment, the support platform has a plurality of parallel longitudinal grooves extending along the length of the support platform, each longitudinal groove corresponding to a plurality of welding positioning slots in each group, thereby providing positioning or accommodating space for the high-temperature superconducting tape to be welded on the plurality of welding positioning slots adjacent to the longitudinal grooves.

[0016] Preferably, the cross-sectional shape of each groove is rectangular, trapezoidal, or arc-shaped.

[0017] Preferably, the upper surface of the support platform has two parallel longitudinal grooves, and the lower surface of the support platform has two parallel longitudinal grooves that are recessed toward the upper surface.

[0018] Preferably, the support platform has a hole that mates with the first connecting part.

[0019] In another preferred embodiment, the heating assembly includes a heating cylinder and a plurality of heating columns, the heating cylinder defining a heating cavity for accommodating the thermally conductive positioning assembly, the clamping assembly, and the connector assembly; The heating cylinder has multiple through holes that are opened along the axial direction of the heating cylinder. The multiple through holes are evenly spaced along the circumference of the heating cylinder and are used to accommodate the heating column.

[0020] In another preferred embodiment, one end of each of the plurality of heating columns is fixedly connected to a conductive wire, and the plurality of conductive wires are fixedly connected to the same plug-in post.

[0021] In another preferred embodiment, the heating cylinder is a cylindrical cylinder.

[0022] In another preferred embodiment, the thermally conductive positioning component includes at least an upper thermally conductive row and a lower thermally conductive row arranged opposite each other, and the thermally conductive positioning component is further configured to position the clamping component and the connector component such that the clamping component and the connector component are located between the upper thermally conductive row and the lower thermally conductive row.

[0023] In another preferred embodiment, both the upper and lower heat conduction arrays are cuboids, and their lengths are the same as the length of the cylindrical body of the heating cylinder. Preferably, one heating column is located directly above the upper heat conduction array, and one heating column is located directly below the lower heat conduction array.

[0024] In another preferred embodiment, the upper surface of the upper heat conduction busbar and the lower surface of the lower heat conduction busbar are both in close contact with the inner wall of the heating cylinder.

[0025] In another preferred embodiment, the clamping assembly includes an upper clamping plate and a lower clamping plate arranged opposite each other. The upper surface of the upper clamping plate is in contact with the lower surface of the upper heat conduction busbar, and the lower surface of the upper clamping plate is in contact with the first connector, the second connector, and the support platform. The upper surface of the lower clamping plate is in contact with the first connector, the second connector, and the support platform, and the lower surface of the lower clamping plate is in contact with the upper surface of the lower heat conduction busbar.

[0026] In another preferred embodiment, the upper clamping plate and the lower clamping plate are detachably fixed together by screws.

[0027] In another preferred embodiment, the widths of the upper clamping plate and the lower clamping plate are both greater than the widths of the upper heat conduction busbar and the lower heat conduction busbar.

[0028] In another preferred embodiment, the width of the lower clamping plate is greater than the width of the upper clamping plate, and the two longitudinally oriented sides of the lower clamping plate are also in contact with the inner wall of the heating cylinder.

[0029] In another preferred embodiment, the operating box is provided with a vacuum structure, so that the operating box is in a vacuum state during the welding process.

[0030] In another preferred embodiment, the vacuuming structure includes a flange provided on the housing and / or cover.

[0031] In another preferred embodiment, the control box includes a box body and a cover plate, and two handles are fixedly connected to the upper end of the cover plate.

[0032] In another preferred embodiment, the welding apparatus further includes two C-shaped placement blocks, with the heating cylinder located on the placement blocks.

[0033] In another preferred embodiment, the welding apparatus further includes heat-conducting pads disposed above the lower heat-conducting busbar and above the upper heat-conducting busbar.

[0034] It should be understood that, within the scope of this invention, the above-described technical features of this invention and the technical features specifically described below (such as in the embodiments) can be combined with each other to form new or preferred technical solutions. Due to space limitations, they will not be described in detail here. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. It should be understood that the accompanying drawings described below are merely some implementation examples of the present invention, and those skilled in the art can obtain other implementation examples based on these drawings without creative effort.

[0036] Figure 1 This is an overall structural diagram of a multilayer high-temperature superconducting tape welding apparatus according to an embodiment of this application; Figure 2 This is a top view schematic diagram of a multilayer high-temperature superconducting tape welding apparatus according to an embodiment of this application; Figure 3 for Figure 2 BB-direction sectional view; Figure 4 A three-dimensional longitudinal sectional view of the internal components of the operating box of a multilayer high-temperature superconducting strip welding apparatus according to an embodiment of this application is shown. Figure 5 A three-dimensional transverse sectional view of a multilayer high-temperature superconducting tape welding apparatus according to an embodiment of this application is shown. Figure 6 This is a schematic diagram of the structure of the first or second joint of a multilayer high-temperature superconducting strip welding device according to an embodiment of this application; Figure 7 This is a schematic diagram of the support platform of a multilayer high-temperature superconducting tape welding apparatus according to an embodiment of this application; Figure 8 This is a schematic diagram of the structure of the multilayer high-temperature superconducting tape obtained by welding according to the multilayer high-temperature superconducting tape welding device of this application.

[0037] In each of the attached figures, the markings are as follows: 1-Control Box 2-Placement Block 3-Heating cylinder 4-Heating column 51-Upper Heat Dissipation Radiator 52-Lower heat sink 61-Upper clamping plate 62-Lower clamping plate 71-First Connector 72-Second Connector 8-Supporting Platform 81-Longitudinal Groove 9-Welding positioning groove 10-Box 11-Cover plate 12-Flange 13-Conductive wire 14-Plug-in pin 15- Thermal pad 16-Aircraft plug interface 17-Handle Detailed Implementation

[0038] Through extensive and in-depth research, Mingren has developed a multi-layer high-temperature superconducting strip welding device for the first time. By setting joints and heat conduction pads, the device ensures the uniformity of welding and the tightness of the welded strip, avoiding uneven welding and misalignment of strip dimensions caused by manual operation. By setting an operating box and flange, the internal air can be completely and evenly discharged, ensuring a tight fit of the welded strip.

[0039] In the following description, many technical details are presented to help the reader better understand this application. However, those skilled in the art will understand that the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0040] the term As used in this article, the term "multilayer high-temperature superconducting tape" refers to a conductor composed of two or more layers of high-temperature superconducting tapes stacked together by means of welding or other methods.

[0041] As used herein, the term "axial direction of the heating cylinder" refers to the direction perpendicular to the radial direction of the heating cylinder, which is also the length direction of the cylindrical heating cylinder; In this invention, all directional indicators (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0042] This application has at least one of the following advantages: (a) The multilayer high-temperature superconducting strip welding device of this application, by setting a joint and a heat conduction pad, allows for the pre-arrangement and classification of strips of different lengths through the stepped welding positioning grooves pre-set on the joint. Thus, each layer of strip can be tinned and arranged before welding. Then, through the heat conduction of the heating cylinder and the heat conduction pad, heat can be transferred from top to bottom at the same time, ensuring the uniformity of welding and the tightness after welding, and avoiding uneven welding and strip size misalignment due to manual arrangement. (b) The multilayer high-temperature superconducting strip welding device of this application is equipped with an operating box and a flange. The operating box can be vacuumed through the flange. During heating and welding, the air bubbles trapped inside the equipment or during tinning can be removed by vacuuming. This allows for the complete and uniform removal of internal air, ensuring a tight fit of the strip after welding and improving welding quality. (c) Through the stepped welding positioning groove, the precise layer positioning of multi-layer strips is achieved, ensuring the consistency of the welded end face structure; (d) The multilayer high-temperature superconducting tape welding device of this application achieves symmetrical heating from top to bottom through heat conduction pads, avoiding local overheating or uneven welding; (e) The multi-layer high-temperature superconducting tape welding device of this application realizes one-time welding of multi-layer tapes, which significantly reduces the processing complexity.

[0043] To make the objectives, technical solutions, and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. It should be understood that these are merely examples provided to the reader of possible implementations of the present invention and are not intended to limit the scope of the invention.

[0044] See Figures 1 to 8 This invention provides a multilayer high-temperature superconducting tape welding device. The device mainly includes an operation box 1, a heating component, a thermally conductive positioning component, a clamping component, and a joint component.

[0045] The control box 1 provides a sealed welding environment and includes a box body 10 and a cover plate 11. Two handles 17 are fixedly connected to the upper end of the cover plate 11 for easy opening and closing. A flange 12 is provided on the box body 10 and / or the cover plate 11. This flange 12 serves as a vacuum structure for connecting an external vacuum pump, allowing a vacuum to be formed and maintained inside the control box 1 during the welding process to remove air and prevent bubbles from forming at the welding points.

[0046] Two C-shaped placement blocks 2 are fixedly connected to the bottom surface of the control box 1. The core part of the heating assembly, namely the heating cylinder 3, is placed on the placement blocks 2. In one embodiment, the heating cylinder 3 is a cylindrical body that defines a heating chamber inside. Multiple through holes are opened along the longitudinal direction (axial direction) of the heating cylinder 3, and these through holes are evenly spaced along the circumference of the heating cylinder 3. Each through hole contains a heating column 4. One end of the multiple heating columns 4 is connected to a common plug-in post 14 through a conductive wire 13. An aviation plug interface 16 (or electrical interface) is provided on the inner side wall of the control box 10 for connecting to an external power source. When the plug-in post 14 is inserted into the aviation plug interface 16, power is supplied to all the heating columns 4, causing them to heat up. This design of evenly arranged heating columns 4 in the circumference helps to heat the heating cylinder 3 evenly and stably.

[0047] The heat-conducting positioning assembly is disposed within the internal heating cavity of the heating cylinder 3. It mainly includes at least an upper heat-conducting strip 51 and a lower heat-conducting strip 52 arranged opposite each other. The upper surface of the upper heat-conducting strip 51 and the lower surface of the lower heat-conducting strip 52 are in close contact with the inner wall of the heating cylinder 3 to efficiently receive heat from the heating cylinder 3. The upper heat-conducting strip 51 and the lower heat-conducting strip 52 are preferably cuboid in shape, and their length is preferably the same as the height (axial length) of the cylindrical heating cylinder 3 to ensure uniform heat transfer. To optimize thermal contact, a heat-conducting pad 15 (such as an aluminum pad) can be provided on the lower surface of the upper heat-conducting strip 51 and the upper surface of the lower heat-conducting strip 52.

[0048] A clamping assembly is used to position and clamp multilayer high-temperature superconducting tapes, and it is located between the upper heat conductor 51 and the lower heat conductor 52. The clamping assembly includes an upper clamping plate 61 and a lower clamping plate 62 arranged opposite each other. In one embodiment, the upper surface of the upper clamping plate 61 is in contact with the upper heat conductor 51 (or the heat-conducting pad 15 on it), and the lower surface of the lower clamping plate 62 is in contact with the lower heat conductor 52 (or the heat-conducting pad 15 below it). The upper clamping plate 61 and the lower clamping plate 62 are detachably fixed together by screws (not shown in the figure), thereby securely clamping the component located therebetween. Preferably, the width of both the upper clamping plate 61 and the lower clamping plate 62 is greater than the width of the upper heat conductor 51 and the lower heat conductor 52 to provide better clamping surface and heat conduction surface. More preferably, the width of the lower clamping plate 62 is greater than the width of the upper clamping plate 61, and the two longitudinal sides of the lower clamping plate 62 are in contact with the inner wall of the heating cylinder 3. This helps to enhance the stability of the entire clamping assembly and improve the heat conduction effect at the bottom.

[0049] The joint assembly is a key component for positioning and shaping the strip, and it is clamped between an upper clamping plate 61 and a lower clamping plate 62. The joint assembly includes a first joint 71 and a second joint 72 disposed opposite each other, and a support platform 8 located between them. Both the first joint 71 and the second joint 72 are provided with multiple sets of welding positioning grooves 9. The multiple welding positioning grooves 9 in each set on each joint are stepped. The welding positioning grooves 9 on the first joint 71 and the second joint 72, together with the support platform 8, are used to accommodate the high-temperature superconducting strip to be welded, thereby forming a stepped structure at the ends of the multilayer high-temperature superconducting strip and achieving synchronous welding.

[0050] Preferably, the first connector 71 and the second connector 72 are components with identical structures. The stepped welding positioning grooves 9 on the first connector 71 and the second connector 72 are used to sequentially accommodate and position the ends of multilayer high-temperature superconducting tapes with increasing (or decreasing) lengths from bottom to top, thereby achieving a stepped arrangement of the tape end faces. The width of the welding positioning groove is consistent with the width of one or more layers of high-temperature superconducting tape. During welding, each layer of tape pre-soaked with solder is placed sequentially into the corresponding stepped welding positioning groove 9, then clamped by a clamping assembly, and then uniformly heated throughout the joint area by a heating assembly and a heat-conducting positioning assembly to melt the solder. This allows for the diffusion welding of multiple layers of tape to be completed in a vacuum environment in one step, forming a composite superconducting tape with stepped end faces.

[0051] In one embodiment, taking the first connector 71 as an example, the first connector 71 has a generally cuboid main body extending along a longitudinal axis X. Multiple sets of welding positioning grooves 9 are recessed on the surface of the main body. The multiple welding positioning grooves 9 in each set are arranged sequentially in a direction parallel to the longitudinal axis X, and the depth of each set of multiple welding positioning grooves 9 gradually increases or decreases from one end of the main body to the other, so that the surface of the main body has a set of stepped planes that rise or fall sequentially. Preferably, each welding positioning groove 9 is itself an elongated groove, preferably with a rectangular or trapezoidal cross-section, and is configured to accommodate and precisely position the end of one or more layers of high-temperature superconducting tape. That is, preferably, the width of the welding positioning groove is consistent with the width of one or more layers of high-temperature superconducting tape.

[0052] Alternatively, the multiple welding positioning grooves 9 in each group are distributed in a stepped manner along the height direction, so that the bottom surfaces of different welding positioning grooves are at different height positions. Through this stepped structure, high-temperature superconducting tape ends of different lengths can be accommodated respectively, so that the multilayer tapes form a preset stepped arrangement structure at the ends.

[0053] In one embodiment, each welding positioning groove 9 can hold multiple layers of high-temperature superconducting tape.

[0054] Preferably, in one embodiment, along the width direction of the first joint 71, the upper surface of the main body of the first joint 71 is recessed downward to form two sets of parallel and spaced welding positioning grooves 9, and the lower surface of the first joint 71 is recessed upward in the direction toward the upper surface to form two sets of parallel and spaced welding positioning grooves 9, which are used to laterally limit the strip material, thereby preventing the strip material from shifting or misaligning during heating. Alternatively, stepped welding positioning grooves 9 are provided on both the upper and lower surfaces of the first joint 71.

[0055] Preferably, the first two sets of welding positioning grooves 9 are vertically aligned with the second two sets of welding positioning grooves 9.

[0056] In one embodiment, the structure of the joint assembly and its mating relationship with the support platform 8 are further defined as follows: the first joint 71 and the second joint 72 are respectively disposed on both sides of the support platform 8 and arranged opposite to each other along the longitudinal axis X, for synchronous positioning and forming of both ends of the multilayer high-temperature superconducting tape. That is, the first joint 71 and the second joint 72 are arranged opposite to each other, and the support platform 8 is located between them to ensure the uniformity of stress and heat transfer during the welding process.

[0057] In one embodiment, the upper and / or lower surfaces of the support platform 8 are provided with a plurality of longitudinal grooves 81, which extend along the length of the support platform. Each longitudinal groove 81 corresponds to a plurality of welding positioning grooves 9 in each group. The longitudinal grooves 81 are used to accommodate the strip portion located in the middle region, thereby forming an overall support and positioning structure for the multi-layer strip in cooperation with the welding positioning grooves 9 on the joint.

[0058] Preferably, the cross-sectional shape of each groove 81 is rectangular, trapezoidal, or arc-shaped. More preferably, the cross-sectional shape of each groove 81 is rectangular.

[0059] In one embodiment, the longitudinal groove 81 on the support platform 8 is spatially connected or aligned with the welding positioning groove 9 on the joint assembly, so that each layer of strip can obtain continuous support in the corresponding longitudinal groove 81 on the support platform 8 when it extends from the first joint 71 to the second joint 72, thereby avoiding the problem of strip being suspended or unevenly stressed.

[0060] Furthermore, the support platform 8 is connected to the first connector 71 and the second connector 72 via a detachable connection structure, such as a plug-in fit, a threaded connection, or a pin connection, thereby facilitating assembly, disassembly, and adaptation to different specifications of strip materials. Preferably, both the first connector 71 and the second connector 72 include a connecting portion extending outward from the side of its main body along the longitudinal axis X, and the connecting portion is connected to the matching hole of the support platform 8.

[0061] Preferably, the support platform 8 is made of a material with high thermal conductivity, such as copper, to improve the uniform distribution of heat along the length of the strip during welding.

[0062] See Figure 8 The device described in this application is used to weld high-temperature superconducting tapes. Compared with traditional manual welding methods, the current-carrying area of ​​the weld joint is increased by more than 3 times, the porosity of the weld interface is significantly reduced, and the structural consistency is significantly improved.

[0063] Optionally, in one embodiment, the multilayer high-temperature superconducting strip welding apparatus further includes an intelligent temperature control system and an integrated control unit.

[0064] For example, the intelligent temperature control system may include multiple high-precision thermocouples (not shown in the figure, for example, embedded in the inner wall of the heating cylinder or inside the upper / lower heat conduction pads (51, 52)) added circumferentially and axially to the heating cylinder 3 for real-time monitoring of the temperature distribution at different locations within the heating cavity. These thermocouples are connected to an external intelligent temperature controller. This temperature controller, together with the power supply module that supplies power to the heating column 4, forms a closed-loop feedback control system. It can dynamically adjust the power output to each heating column 4 according to a preset welding temperature curve, achieving constant temperature control of the heating area or precise temperature control according to a specific program (such as heating-holding-cooling), completely solving the problem of "accidental melting of the lower layer of solder due to heat conduction" in the prior art.

[0065] The integrated control unit includes a central controller (such as a PLC or industrial computer) that integrates the aforementioned intelligent temperature control system and vacuum system (connected via flange 12). This controller is equipped with a human-machine interface, allowing the operator to input welding process parameters (such as target temperature profile, vacuum requirements, and holding time).

[0066] In one embodiment, optionally, the following welding process method is provided: Using the apparatus of this embodiment, an optimized method for welding stepped end faces of multilayer high-temperature superconducting tapes is performed, with the following steps: Step 1: Loading and Pre-positioning Open the cover 11 of the operation box 1 and place the assembled welding core module (including the heating cylinder 3, the internal heat-conducting positioning components, the clamping components, and the multi-layer pre-tinned high-temperature superconducting strip that has been placed in the stepped welding positioning groove 9) on the placement block 2.

[0067] Connect the plug 14 to the aviation plug interface 16, and connect the thermocouple signal line to the control unit.

[0068] Step Two: Sealing and Vacuuming Close the cover 11 to ensure that the operating box 1 is sealed.

[0069] The vacuum pump is started via the controller, and a vacuum is drawn into the control box 1 through flange 12 until the preset vacuum level required for welding is reached (e.g., below 1×10⁻⁶). -2 Pa) to eliminate air and prevent oxidation and bubble formation.

[0070] Step 3: Heating and Welding The heating assembly is activated to heat the heating cylinder 3. Heat is evenly transferred to the joint assembly and the strip to be welded via the thermally conductive positioning assembly (upper and lower heat-conducting pads) and the clamping assembly, causing the solder on each layer of the strip to melt synchronously and diffusely bond, thereby forming a stepped structure at both ends of the multilayer high-temperature superconducting strip. Optionally, the temperature curve can be precisely controlled through an intelligent temperature control system during this process.

[0071] Step 4: Pick up the package After the welding cycle is completed, the vacuum system is turned off, and an inert gas (such as nitrogen) is introduced into the operation box 1 to atmospheric pressure. The cover plate 11 is opened, and the welded multilayer superconducting tape assembly is taken out.

[0072] It should be noted that in this patent application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. In this patent application, if it refers to performing an action according to an element, it means performing the action at least according to that element, including two cases: performing the action only according to that element, and performing the action according to that element and other elements. Expressions such as "multiple," "repeatedly," and "various" include two, two times, two kinds, and more than two, more than two times, and more than two kinds.

[0073] All documents mentioned in this application are considered to be incorporated in their entirety into the disclosure of this application so that they can serve as a basis for modifications if necessary. Furthermore, it should be understood that after reading the foregoing disclosure of this application, those skilled in the art can make various alterations or modifications to this application, and these equivalent forms also fall within the scope of protection claimed in this application.

Claims

1. A multilayer high-temperature superconducting tape welding device, characterized in that, include: Operation box (1), the operation box (1) is configured to provide a closed welding environment; A heating assembly is disposed within the operating box (1) and configured to provide the heat required for welding; A thermally conductive positioning component is disposed inside the heating component and configured to uniformly conduct the heat generated by the heating component; Clamping assembly for positioning and clamping high-temperature superconducting tape to be welded; The connector assembly is disposed in the space formed by the clamping assembly. The connector assembly includes a first connector (71) and a second connector (72) disposed opposite to each other, and a support platform (8) disposed between the first connector (71) and the second connector (72). Multiple sets of welding positioning grooves (9) are provided on the first connector (71) and the second connector (72). The multiple welding positioning grooves (9) of each set on each connector are stepped. The welding positioning grooves (9) on the first connector (71) and the second connector (72) together with the support platform (8) are used to accommodate the high-temperature superconducting tape to be welded, so that the end of the multilayer high-temperature superconducting tape forms a stepped structure and achieves synchronous welding.

2. The welding apparatus as described in claim 1, characterized in that, The first connector (71) has a generally rectangular body portion that extends along a longitudinal axis (X). Multiple sets of welding positioning grooves (9) are recessed on the surface of the body portion. Multiple welding positioning grooves (9) in each set are arranged sequentially in a direction parallel to the longitudinal axis (X). The depth of multiple welding positioning grooves (9) in each set gradually increases or decreases from one end of the body portion to the other end, so that the surface of the body portion has a set of stepped planes that rise or fall sequentially.

3. The welding apparatus as described in claim 2, characterized in that, The upper surface of the main body of the first connector (71) is recessed downward to form two sets of parallel welding positioning grooves (9) spaced at a certain distance. The lower surface of the main body of the first connector (71) is recessed upward in the direction toward the upper surface to form two sets of parallel welding positioning grooves (9) spaced at a certain distance.

4. The welding apparatus as described in claim 3, characterized in that, The support platform (8) has multiple parallel longitudinal grooves (81) that extend along the length of the support platform (8). Each longitudinal groove (81) corresponds to multiple welding positioning grooves (9) in each group, thereby providing positioning or accommodating space for the high-temperature superconducting strip to be welded on the multiple welding positioning grooves (9) adjacent to the longitudinal groove.

5. The welding apparatus as described in claim 1, characterized in that, The heating assembly includes a heating cylinder (3) and multiple heating columns (4), wherein the heating cylinder (3) defines a heating cavity for accommodating the heat-conducting positioning assembly, the clamping assembly and the connector assembly; On the body of the heating cylinder (3), a plurality of through holes are provided along the axial direction of the heating cylinder (3). The plurality of through holes are evenly spaced along the circumference of the heating cylinder (3). The through holes are used to accommodate the heating column (4).

6. The welding apparatus as described in claim 5, characterized in that, The thermally conductive positioning component includes at least an upper thermally conductive row (51) and a lower thermally conductive row (52) arranged opposite to each other. The thermally conductive positioning component is also configured to position the clamping component and the connector component such that the clamping component and the connector component are located between the upper thermally conductive row (51) and the lower thermally conductive row (52).

7. The welding apparatus as described in claim 6, characterized in that, The upper surface of the upper heat conduction busbar (51) and the lower surface of the lower heat conduction busbar (52) are both in close contact with the inner wall of the heating cylinder (3).

8. The welding apparatus as described in claim 7, characterized in that, The clamping assembly includes an upper clamping plate (61) and a lower clamping plate (62) arranged opposite to each other. The upper surface of the upper clamping plate (61) is in contact with the lower surface of the upper heat conduction busbar (51), and the lower surface of the upper clamping plate (61) is in contact with the first connector (71), the second connector (72), and the support platform (8). The upper surface of the lower clamping plate (62) is in contact with the first connector (71), the second connector (72) and the support platform (8), and the lower surface of the lower clamping plate (62) is in contact with the upper surface of the lower heat conduction busbar (52).

9. The welding apparatus as described in claim 8, characterized in that, The upper clamping plate (61) and the lower clamping plate (62) are detachably fixed together by screws.

10. The welding apparatus as claimed in claim 1, characterized in that, The operation box (1) is equipped with a vacuum structure, so that the operation box (1) is in a vacuum state during the welding process.

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