Welding tool for superconducting coil

Abstract

The utility model relates to the technical field of superconducting magnets, in particular to a welding tool for a superconducting coil, comprising: a clamping assembly for clamping a superconducting coil skeleton; the pressure assembly comprises a plurality of spring dampers arranged in the circumferential direction of the superconducting coil and is used for applying pressure to the position to be welded; the supporting assembly comprises a first supporting rod and a second supporting rod which are perpendicular to each other, the clamping assembly is arranged on the first supporting rod, the pressure assembly is arranged on the second supporting rod, and the pressure assembly can move along the second supporting rod. The spring damper can ensure that the pressure applied to the superconducting tape is stable in the whole welding process, the contact surface between the welding tool and the position to be welded is small, the relative specific heat capacity is small, and the influence of environmental factors on the welding process is reduced. And meanwhile, the pressure assembly can move along the second supporting rod, so that the pressure assembly can adapt to superconducting coils with more curvature radiuses, and the welding flexibility and adaptability can be guaranteed.

Description

Technical Field

[0001] This application relates to the field of superconducting magnet technology, and more specifically to a welding fixture for superconducting coils. Background Technology

[0002] Superconducting magnets are increasingly being used in strong magnetic field applications due to their advantages such as generating large magnetic fields, small size, and light weight. The limited length of superconducting tape dictates that the structure of a superconducting magnet consists of multiple coils connected in series, with the coils welded together via superconducting joints. Large coils can use kilometer-scale amounts of tape, resulting in multiple superconducting joints within a single coil.

[0003] Existing superconducting joint welding equipment can be divided into two types: manual welding and fixture welding. Manual welding involves directly applying welding pressure and controlling heating time using a handheld welding torch. While manual welding is not affected by the diameter of the superconducting coil and offers high flexibility, it is heavily influenced by the operator's skill and experience, making it difficult to guarantee consistent welding processes. Furthermore, it is limited by the welding space, making it difficult to weld joints in confined areas. Fixture welding, on the other hand, typically involves designing a fixture of a specific shape, applying pressure to the strip using bolts, and heating the fixture with a welding torch or similar device. During heating, the bolts are tightened, compressing and thinning the solder between the strips. After completion, the heating device is removed, and the fixture is disassembled after reheating. The fixture can be arc-shaped or straight, and is used for welding joints between coils. The disadvantages of this method are that the fixture has a large heat capacity, resulting in long heating and cooling times, which may lead to delamination of the superconducting strip. Additionally, tightening the fixture with bolts may cause uneven stress on the superconducting strip, leading to deformation and breakage. Moreover, different fixtures need to be designed specifically for superconducting coils of different radii, resulting in poor flexibility and adaptability.

[0004] Therefore, how to more flexibly ensure the welding quality of superconducting coils of different sizes has become an urgent technical problem to be solved. Utility Model Content

[0005] This application provides a welding fixture for superconducting coils to solve the technical problem mentioned in the background art of how to more flexibly ensure the welding quality of superconducting coils of different sizes.

[0006] According to a first aspect, this application provides a welding fixture for a superconducting coil, comprising: a clamping assembly for clamping a superconducting coil frame; a pressure assembly including a plurality of spring dampers arranged along the circumferential direction of the superconducting coil for applying pressure to the welding position; and a support assembly including a first support rod and a second support rod arranged perpendicularly to each other, wherein the clamping assembly is disposed on the first support rod, the pressure assembly is disposed on the second support rod, and the pressure assembly is movable along the second support rod.

[0007] In one embodiment, the pressure assembly includes a support arm symmetrically disposed on the second support rod, and the spring damper is disposed on the support arm.

[0008] In one embodiment, the support arm includes a plurality of lockable movable joints.

[0009] In one embodiment, a plurality of the spring dampers are adapted to the curved surface of the superconducting coil at one end facing the superconducting coil.

[0010] In one embodiment, the support assembly further includes a threaded rod connected to the second support rod and parallel to the first support rod, and the pressure assembly is mounted on the threaded rod.

[0011] In one embodiment, the pressure assembly is movable along the threaded rod.

[0012] In one embodiment, the clamping assembly includes a first clamping plate and a second clamping plate, which are respectively movable along the first support rod.

[0013] In one embodiment, the welding fixture for the superconducting coil further includes a heating device comprising a heating band, which is pressed and fixed at the welding position by the spring damper.

[0014] In one embodiment, the heating device further includes a temperature controller and a temperature probe. The heating band and the temperature probe are respectively connected to the temperature controller. The temperature probe is disposed on the heating band for monitoring the temperature value of the heating band.

[0015] This application has at least the following beneficial effects:

[0016] The clamping assembly is mounted on the first support rod of the support assembly, clamping the superconducting coil skeleton. The pressure assembly is mounted on the second support rod of the support assembly, with the first and second support rods perpendicular to each other. The pressure assembly presses the welding position against the superconducting coil by multiple spring dampers arranged along the circumferential direction of the superconducting coil. The addition of spring dampers ensures stable pressure applied to the superconducting tape throughout the welding process, simplifying the operation. The small contact area between the welding fixture and the welding position results in a relatively small specific heat capacity, reducing the impact of environmental factors on the welding process. Simultaneously, the pressure assembly can move along the second support rod, allowing it to be moved to a suitable position on the second support rod according to the diameter of the superconducting coil, thus accommodating superconducting coils with a wider range of curvature radii and ensuring welding flexibility and adaptability.

[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the welding fixture for superconducting coils provided in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the welding fixture for the superconducting coil provided in the embodiments of this application after installation.

[0021] The diagram is shown below:

[0022] 10. Clamping assembly; 11. First clamping plate; 12. Second clamping plate; 20. Pressure assembly; 21. Support arm; 211. Movable joint; 22. Spring damper; 30. Support assembly; 31. First support rod; 32. Second support rod; 33. Threaded rod; 40. Heating device; 41. Heating belt; 42. Temperature controller; 43. Temperature probe. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] This application provides a welding fixture for superconducting coils, such as... Figure 1 and Figure 2As shown, the welding fixture includes a clamping assembly 10 for clamping the superconducting coil frame 50; a pressure assembly 20 including a plurality of spring dampers 22 arranged along the circumferential direction of the superconducting coil for applying pressure to the welding position; and a support assembly 30 including a first support rod 31 and a second support rod 32 arranged perpendicularly to each other, wherein the clamping assembly 30 is disposed on the first support rod 31, the pressure assembly 20 is disposed on the second support rod 32, and the pressure assembly 20 is movable along the second support rod 32.

[0025] In this embodiment, the clamping assembly 20 is mounted on the first support rod 31 of the support assembly 30, and the clamping assembly 10 clamps the superconducting coil skeleton 50. The pressure assembly 20 is mounted on the second support rod 32 of the support assembly 30, and the first support rod 31 and the second support rod 32 are perpendicular to each other. The pressure assembly 20 presses the welding position by means of multiple spring dampers 22 arranged along the circumferential direction of the superconducting coil. The addition of the spring dampers 22 can ensure that the pressure applied to the superconducting tape is stable throughout the welding process, simplifying the operation process and reducing the impact of environmental factors on the welding process. At the same time, the pressure assembly 20 can move along the second support rod 32, which allows the pressure assembly 20 to move to a suitable position on the second support rod 32 according to the diameter of the superconducting coil, so as to accommodate superconducting coils with more radii of curvature, ensuring the flexibility and adaptability of welding.

[0026] In one embodiment, the pressure assembly 20 includes a support arm 21 symmetrically arranged on the second support rod 31, and the spring dampers 22 are uniformly arranged on the support arm 21. In this embodiment, the support arm 21 can be a ring-shaped fixed support arm to adapt to the curvature of the superconducting coil and cooperate with multiple spring dampers 22 to press the position to be welded.

[0027] In another embodiment, the support arm 21 can also be an adjustable-angle support arm, with multiple lockable movable joints 211 on the support arm 21. In this embodiment, the support arm 21 has multiple segments, each connected by a fixing bolt. The fixing bolt connection serves as the movable joint 211 of the support arm. The angle of the support arm 21 is adjusted by loosening the fixing bolt. After adjusting to an angle that matches the curvature of the superconducting coil to be welded, multiple spring dampers 22 press against the position to be welded, and the fixing bolt is tightened to ensure stable pressure during subsequent heating and welding. The adjustable-angle support arm 21, in conjunction with multiple spring dampers 22, provides pressure support. By adjusting the support arm 21 to an angle that matches the curvature of the superconducting coil, and by adapting the end of the multiple spring dampers 22 facing the superconducting coil to the curved surface of the superconducting coil, it can adapt to curved surfaces of any radius of curvature and can weld superconducting coils placed horizontally, vertically, or in any plane, ensuring welding flexibility and adaptability. The number of spring dampers 22 can be selected according to the actual situation.

[0028] Furthermore, the support assembly 30 also includes a threaded rod 33 connected to the second support rod 32 and parallel to the first support rod 31. The pressure assembly 20 is mounted on the threaded rod 33. In this embodiment, the second support rod 32 can be a sliding rod, and the threaded rod 33 can slide along the second support rod 32, thereby enabling the pressure assembly 20 to move up and down and back and forth. Therefore, for curved surfaces with any radius of curvature within the movement range of the pressure assembly 20, welding of superconducting coils placed horizontally, vertically, or in any plane is possible, further improving the flexibility and adaptability of welding.

[0029] In one embodiment, the clamping assembly 10 includes a first clamping plate 11 and a second clamping plate 12, which are movable along the first support rod 31. For example, the first clamping plate 11 and the second clamping plate 12 can be strip-shaped clamps. The first clamping plate 11 and the second clamping plate 12 can hold the superconducting coil frame 50. The first clamping plate 11 and the second clamping plate 12 can be fixed to the first support rod 31 by bolts. After loosening the corresponding bolts of the first clamping plate 11 and the second clamping plate 12, the first clamping plate 11 and the second clamping plate 12 can move along the first support rod 31. This allows the position between the first clamping plate 11 and the second clamping plate 12 to be adjusted according to the size of the superconducting coil frame 50 and the required placement angle of the superconducting coil for welding. This enables the clamping of superconducting coils of any size and accommodates welding at various placement angles of the superconducting coil, ensuring the flexibility and adaptability of the welding process.

[0030] In one embodiment, the welding fixture further includes a heating device 40, which includes a heating band 41, which is pressed and fixed at the position to be welded by the spring damper 22.

[0031] The heating device 40 also includes a temperature controller 42 and a temperature probe 43. The heating band 41 and the temperature probe 43 are respectively connected to the temperature controller 42. The temperature probe 43 is disposed on the heating band 41 and is used to monitor the temperature value of the heating band 41.

[0032] In practical applications, the first clamping plate 11 and the second clamping plate 12 of the clamping assembly 10 are clamped to the superconducting coil skeleton 50 at the point to be welded. The positions of the first clamping plate 11 and the second clamping plate 12 on the superconducting coil skeleton 50 are adjusted, and finally the fixing bolts of the first clamping plate 11 and the second clamping plate 12 are tightened to complete the fixing of the welding fixture. Then, the pressure assembly 20 is adjusted to press the heating band 41 and the position to be welded. First, the nut fixing the pressure module below the threaded rod 33 is loosened, and the height of the pressure assembly 20 is adjusted to be consistent with that of the superconducting coil to be welded. Then, the fixing nut is tightened to fix the horizontal height of the pressure assembly 20. Then, the nut connecting the fixing threaded rod 33 and the second support rod 32 is loosened, and the pressure assembly 20 is moved horizontally to the outside of the superconducting coil until the spring damper 22 presses the heating band 41. The nut connecting the threaded rod 33 and the second support rod 32 is tightened to fix the position of the threaded rod 33, thus completing the position fixing of the pressure assembly 20. After fixing the position of the pressure component 20, loosen the fastening bolts of the movable joint 211 of the fixed support arm, adjust the remaining spring dampers 22 to the appropriate position, press the heating band 41 and strip at the welding position, and then tighten the fastening bolts of the movable joint 211 to ensure stable pressure during the subsequent heating and welding process.

[0033] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A welding fixture for superconducting coils, characterized in that, include: Clamping assembly for clamping the superconducting coil bobbin; The pressure assembly includes a plurality of spring dampers arranged along the circumferential direction of the superconducting coil for applying pressure to the welding position; The support assembly includes a first support rod and a second support rod arranged perpendicularly to each other, wherein the clamping assembly is disposed on the first support rod, the pressure assembly is disposed on the second support rod, and the pressure assembly is movable along the second support rod.

2. The welding fixture for superconducting coils as described in claim 1, characterized in that, The pressure assembly includes a support arm symmetrically arranged on the second support rod, and the spring damper is arranged on the support arm.

3. The welding fixture for superconducting coils as described in claim 2, characterized in that, The support arm includes multiple lockable movable joints.

4. The welding fixture for superconducting coils as described in any one of claims 1-3, characterized in that, The plurality of spring dampers are adapted to the curved surface of the superconducting coil at one end facing the superconducting coil.

5. The welding fixture for superconducting coils as described in claim 1, characterized in that, The support assembly further includes a threaded rod connected to the second support rod and parallel to the first support rod, and the pressure assembly is mounted on the threaded rod.

6. The welding fixture for superconducting coils as described in claim 5, characterized in that, The pressure component is movable along the threaded rod.

7. The welding fixture for superconducting coils as described in claim 1, characterized in that, The clamping assembly includes a first clamping plate and a second clamping plate, which are respectively movable along the first support rod.

8. The welding fixture for superconducting coils as described in claim 1, characterized in that, It also includes a heating device, which includes a heating band that is pressed and fixed at the position to be welded by the spring damper.

9. The welding fixture for superconducting coils as described in claim 8, characterized in that, The heating device also includes a temperature controller and a temperature probe. The heating belt and the temperature probe are respectively connected to the temperature controller. The temperature probe is set on the heating belt to monitor the temperature value of the heating belt.

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