Reusable dipping detachable welding tool suitable for superconducting solenoid coil

Abstract

The utility model discloses a reusable dipping detachable welding tool suitable for a superconducting solenoid coil. The reusable dipping detachable welding tool comprises a dipping assembly and a radial restraining assembly. An inner cylinder and an outer cylinder of the dipping assembly form an annular dipping space for containing a coil, a first plugging part and a second plugging part at the two axial ends of the dipping space are detachably connected with the inner cylinder and the outer cylinder in a sealed mode, the radial restraining assembly exerts radial abutting force on the outer cylinder through a plurality of evenly-distributed abutting parts, and the outer cylinder can be prevented from deforming and bulging; all the components of the impregnation assembly are detachably connected, the radial restraining assembly and the impregnation assembly are detachably connected, after impregnation is completed, the tool can be conveniently detached, cleaned and reused, operation is convenient, and the advantage of being low in cost is achieved.

Description

Technical Field

[0001] This utility model relates to the field of superconducting magnet manufacturing technology, and in particular to a reusable impregnation and detachable welding fixture suitable for superconducting solenoid coils. Background Technology

[0002] Superconducting solenoid coils are a core component of superconducting magnets. Their fabrication involves a vacuum pressure impregnation process where a resin-based impregnating agent is filled into the gaps between the turns and layers of the winding and then cured. This process secures the winding against vibration and wear caused by Lorentz forces, improves insulation performance to prevent quenching failure, and creates heat dissipation channels to ensure stable operation of the coil under strong magnetic fields and high current conditions. Existing impregnation fixtures for superconducting solenoid coils are mostly customized structures for different coil models. Even fixtures designed for the same coil model are often single-use products, requiring destructive removal after impregnation, making them unusable and offering virtually no room for modification to adapt to other coil models. Such customized tooling has many drawbacks: First, the processing cost is high and the cycle is long, which seriously delays the production process of superconducting coils; second, the tooling processing is highly dependent on precision machining equipment such as CNC lathes, and the proportion of precision-machined parts is large, resulting in high processing difficulty and long processing time; third, when dealing with the risk of internal pressure deformation during the impregnation process, existing tooling often adopts the method of increasing the material thickness and strength, which further increases the processing cost and tooling weight; fourth, if the sealing and constraint effect of the impregnation tooling is not good, it is easy to cause the coil impregnation to be unqualified, resulting in the magnetic field uniformity and strength after the superconducting coil is energized not meeting the design requirements, and ultimately causing the magnet to lose quench and be damaged.

[0003] Therefore, the existing superconducting solenoid coil impregnation tooling suffers from high processing costs and low reliability. Utility Model Content

[0004] The purpose of this invention is to solve the problems of high processing cost and low reliability in the existing superconducting solenoid coil impregnation tooling.

[0005] To achieve the above objectives, this application provides a reusable impregnation and detachable welding fixture suitable for superconducting solenoid coils, including an impregnation assembly and a radial constraint assembly. The impregnation assembly includes an inner cylinder and an outer cylinder spaced at a first preset distance outside the inner cylinder. An impregnation space for accommodating the superconducting solenoid coil is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder. The impregnation space is annular, with a first sealing component and a second sealing component respectively provided at its two axial ends. The first sealing component and the second sealing component are detachably and sealingly connected to the corresponding axial ends of the inner cylinder and the corresponding axial ends of the outer cylinder, respectively. The radial constraint assembly includes a main body component fitted outside the outer cylinder and a plurality of pushing components. Each pushing component extends radially along the outer cylinder, and one end of each pushing component is movably connected to the main body component in a radial direction, while the other end abuts against the outer wall of the outer cylinder. The plurality of pushing components are evenly distributed at a second preset distance on the outer periphery of the outer cylinder.

[0006] Furthermore, the outer cylinder is provided with a heat insulation layer and a limiting layer stacked in the radial direction, the impregnation space is located between the inner wall surface of the heat insulation layer and the outer wall surface of the inner cylinder, and the other end of each pushing component abuts against the outer wall surface of the limiting layer.

[0007] By adopting the above technical solution, this application forms an annular sealed impregnation space adapted to the superconducting solenoid coil through the impregnation assembly, which fits the structural characteristics of the solenoid coil and can make the impregnating agent fully envelop the coil, thus improving the impregnation effect; and the radial constraint assembly applies radial clamping force to the outer cylinder through multiple evenly distributed pushing parts, which effectively counteracts the internal pressure thrust during the impregnation process, can prevent the outer cylinder from deforming and bulging, and improve the reliability of the impregnation operation.

[0008] Furthermore, the components of the impregnation assembly and the radial constraint assembly are detachable, allowing for easy removal of the tooling after impregnation. After cleaning, the tooling components can be reused for impregnation of the same type of solenoid coil, which helps improve the utilization rate of the tooling, avoids the waste of disposable tooling resources, and further reduces the production cost of superconducting coils.

[0009] Furthermore, since the outer cylinder is designed as a stacked structure of a heat insulation layer and a limiting layer in this application, and the radial thrust is applied to the limiting layer, the heat insulation layer can block the heat generated by the curing of the impregnating agent from being transferred to the outside during the coil impregnation and curing operation. This prevents the limiting layer from unevenly transmitting the constraint force due to thermal deformation. The limiting layer can act as a rigid support structure to withstand the radial thrust, avoiding direct contact between the hard thrusting component and the heat insulation layer, thus preventing pressure loss. This allows the outer cylinder to achieve both heat insulation performance and structural integrity. Moreover, the stacked structure allows for the separate assembly and disassembly of the two layers, improving the flexibility of tooling maintenance.

[0010] According to the reusable impregnation and detachable welding fixture for superconducting solenoid coils provided in this application, the main component is set as a cage frame structure, one end of the pushing component is threaded to the cage frame structure, and the other end has a protruding structure that is pressed against the outer wall of the outer cylinder.

[0011] By adopting the above technical solution, since the main component is set as a cage frame structure in this application, and the pushing component is connected to the frame by threads and a protruding structure is set at the pushing end, the main component can reduce the use of consumables and reduce its own weight while ensuring the support strength when assembling and using the radial constraint component. The threaded connection can flexibly adjust the radial position of the pushing component and achieve precise control of the constraint force. The protruding structure can increase the contact area with the outer cylinder, thereby improving the uniformity of radial constraint and avoiding damage to the outer cylinder due to local stress concentration. At the same time, the cage-like hollow structure can facilitate the observation of the outer cylinder's condition and timely detection of abnormalities during the impregnation process.

[0012] According to the reusable impregnation and detachable welding fixture for superconducting solenoid coils provided in this application, the main component has a cylindrical frame structure, and the main component includes a plurality of constraint rings evenly spaced along the axial direction of the main component and a plurality of strip constraint plates evenly distributed along the circumference of the main component. The plurality of constraint rings and the plurality of strip constraint plates are staggered, and one end of the pushing component is threaded to the staggered node position of the constraint rings and the strip constraint plates to fix the staggered node position of the constraint rings and the strip constraint plates.

[0013] By adopting the above technical solution, since the main component is set as a cylindrical frame structure composed of interlaced constraint rings and strip constraint plates, and the pushing component is threaded to the interlaced node position of the two, the processing and splicing of the frame structure can be made more convenient when assembling and using the radial constraint component. The number and spacing of constraint rings and strip constraint plates can be flexibly adjusted according to the size of the outer cylinder to adapt to different specifications of impregnation components. At the same time, the pushing component can lock the interlaced node while transmitting radial constraint force, thereby achieving the effect of enhancing the overall rigidity of the main component, preventing the frame itself from deforming, and improving the comprehensiveness and stability of radial constraint.

[0014] According to the reusable impregnation and detachable welding fixture for superconducting solenoid coils provided in this application, the pushing component is configured as a rod-shaped structure, and one end of the pushing component is formed with a threaded portion. The threaded portion is threadedly connected to the staggered node position, and the first nut and the second nut are respectively threadedly connected to both sides of the threaded portion at the staggered node position. The protruding structure is configured as a clamping block fixedly connected to the other end of the pushing component.

[0015] By adopting the above technical solution, since the pushing component is set as a rod-shaped structure and double nuts are set on both sides of the threaded part for locking, and the protruding structure is set as an independent clamping block, it is easier for the operator to turn and adjust the radial position when adjusting and using the pushing component, thereby improving assembly efficiency. The double nut structure can effectively prevent the threads from loosening due to vibration and ensure the stable transmission of constraint force. The independent clamping block can be flexibly designed according to the shape of the outer wall of the outer cylinder, thereby improving the fit between the pushing component and the outer cylinder and further ensuring the uniformity of radial constraint.

[0016] According to the reusable impregnation and detachable welding fixture for superconducting solenoid coils provided in this application, the heat insulation layer includes a first split heat insulation structure and a second split heat insulation structure, both of which are configured with a semi-circular cross-section and are detachably connected at their circumferential cross-sections; the limiting layer includes a first split side plate and a second split side plate, both of which are configured with a semi-circular cross-section and are detachably connected at their circumferential cross-sections.

[0017] By adopting the above technical solution, since both the heat insulation layer and the limiting layer are designed as semi-circular split structures in this application, the outer cylinder can be quickly snapped onto the outer periphery of the solenoid coil during assembly and disassembly, avoiding interference with the coil and improving assembly efficiency. At the same time, the split structure can achieve non-destructive disassembly of the tooling without destructive operations, thereby ensuring the structural integrity of the tooling components, facilitating cleaning and reuse, and making the disassembled components lighter in weight, which is convenient for operators to handle and operate.

[0018] According to the reusable impregnation and detachable welding fixture for superconducting solenoid coils provided in this application, the first sealing component is configured as a first sealing cover plate, the second sealing component is configured as a second sealing cover plate, and the limiting layer has rolled edges formed at both ends along its axial direction. The first sealing cover plate is connected to the rolled edge of one end of the limiting layer, and the second sealing cover plate is connected to the rolled edge of the other end of the limiting layer.

[0019] By adopting the above technical solution, since the sealing component is set as a cover plate structure in this application, and a rolled edge strip is set at the end of the limiting layer as the connection base of the cover plate, the processing of the cover plate can be simpler and the cost lower when sealing the immersion space. The plate structure can form a good fit with the ends of the inner and outer cylinders, improving the sealing effect. The rolled edge strip can provide precise positioning for the cover plate, eliminating the need for additional positioning structures, thereby simplifying the assembly process and improving the sealing reliability of the immersion space. Furthermore, the connection method between the cover plate and the rolled edge strip can achieve quick assembly and disassembly without damaging the tooling components, further ensuring the reusability of the tooling.

[0020] According to the reusable impregnation and detachable welding fixture for superconducting solenoid coils provided in this application, the heat insulation layer is made of nylon sheet and the limiting layer is made of sheet metal.

[0021] Using the above technical solutions, nylon sheets can meet the heat insulation requirements of impregnation operations, and their smooth surface makes them less prone to sticking to the impregnating agent, facilitating tooling cleaning. At the same time, nylon sheets are simple to process and form, requiring no precision machining equipment. Sheet metal parts have good rigidity and resistance to deformation, can withstand radial clamping force and impregnation internal pressure, and can be processed by simple processes such as bending and snapping, thereby reducing the difficulty and cost of outer cylinder processing and reducing reliance on precision machining equipment. In addition, the combination of nylon sheets and sheet metal parts enables lightweight tooling design, facilitating disassembly, assembly, and handling.

[0022] According to the reusable impregnation and detachable welding fixture for superconducting solenoid coils provided in this application, the outer wall surface of the inner cylinder, the inner wall surface of the outer cylinder, the inner wall surface of the first sealing component, and the inner wall surface of the second sealing component are all coated with Teflon coating or fluororesin coating.

[0023] By adopting the above technical solution, since all inner wall surfaces of the tooling in contact with the impregnating agent are coated with Teflon or fluororesin coating, during coil impregnation and tooling removal operations, the low surface energy coating can effectively prevent the impregnating agent from adhering to the inner wall of the tooling, achieving non-destructive and rapid separation of the tooling and coil, avoiding scratching the coil winding or damaging the tooling during removal, thereby improving the coil impregnation yield. At the same time, the coating allows the tooling to be cleaned simply by wiping, without the need for high-intensity grinding, ensuring the structural accuracy of the tooling components, improving tooling cleaning efficiency, laying the foundation for reuse, and the corrosion resistance and high temperature resistance of the coating can be adapted to different impregnation conditions, extending the service life of the tooling.

[0024] According to the reusable impregnation and detachable welding fixture for superconducting solenoid coils provided in this application, a liquid level tube communicating with the impregnation space is also provided on the outside of the outer cylinder, and the liquid level tube has a transparent structure; furthermore, a first connector communicating with the impregnation space is provided on the outer wall surface of the first sealing component, and a second connector communicating with the impregnation space is provided on the outer wall surface of the second sealing component.

[0025] By adopting the above technical solution, since a transparent liquid level tube is set in the outer cylinder and a connector connecting the impregnation space is set in the sealing component, the transparent liquid level tube can realize the real-time visualization and monitoring of the impregnating agent level during vacuum pressure impregnation. Operators can accurately control the amount of glue injected to ensure that the coil is completely covered. At the same time, abnormalities such as leakage and lack of liquid can be detected in time. The standardized connector can flexibly connect to auxiliary equipment such as vacuum pumps and glue injection devices, adapting to the complete process requirements of vacuum pressure impregnation, thereby improving the reliability and yield of impregnation operations. Moreover, the sealed connection structure of the liquid level tube and the connector can ensure the high airtightness of the impregnation space, preventing impregnating agent leakage and air entry, and ensuring the quality of coil impregnation. In addition, both are detachable structures that can be cleaned and replaced separately, reducing tooling maintenance costs. Attached Figure Description

[0026] Figure 1 A three-dimensional structural schematic diagram of the superconducting solenoid coil impregnation fixture provided in an embodiment of this utility model;

[0027] Figure 2 A three-dimensional structural schematic diagram of the radial constraint component in the superconducting solenoid coil impregnation fixture provided for an embodiment of this utility model;

[0028] Figure 3 A three-dimensional structural diagram of the constraint ring in the superconducting solenoid coil impregnation fixture provided in this embodiment of the utility model;

[0029] Figure 4 A three-dimensional structural diagram of the strip constraint plate in the superconducting solenoid coil impregnation fixture provided for an embodiment of this utility model;

[0030] Figure 5 A three-dimensional structural diagram of the constraint ring in the superconducting solenoid coil impregnation fixture provided in this embodiment of the utility model;

[0031] Figure 6 A three-dimensional structural schematic diagram of the impregnation assembly in the superconducting solenoid coil impregnation fixture provided for an embodiment of this utility model;

[0032] Figure 7 A cross-sectional structural schematic diagram of the impregnation assembly in the superconducting solenoid coil impregnation fixture provided for an embodiment of this utility model;

[0033] Figure 8 A schematic diagram of the main structure of the impregnation assembly in the superconducting solenoid coil impregnation fixture provided in this embodiment of the utility model;

[0034] Figure 9 A three-dimensional structural diagram of the inner cylinder in the superconducting solenoid coil impregnation fixture provided in this embodiment of the utility model;

[0035] Figure 10A three-dimensional structural diagram of the first split heat insulation structure in the superconducting solenoid coil impregnation fixture provided for an embodiment of this utility model;

[0036] Figure 11 A three-dimensional structural schematic diagram of the first split side plate in the superconducting solenoid coil impregnation fixture provided for an embodiment of this utility model;

[0037] Figure 12 A three-dimensional structural diagram of the second split side plate in the superconducting solenoid coil impregnation fixture provided for an embodiment of this utility model;

[0038] Figure 13 A three-dimensional structural schematic diagram of the first sealing component in the superconducting solenoid coil impregnation fixture provided for an embodiment of this utility model;

[0039] Figure 14 A three-dimensional structural schematic diagram of the second sealing component in the superconducting solenoid coil impregnation fixture provided for an embodiment of this utility model;

[0040] Figure 15 A schematic diagram illustrating the removal of the impregnation assembly in the superconducting solenoid coil impregnation fixture provided in this embodiment of the utility model.

[0041] Explanation of reference numerals in the attached figures:

[0042] 10. Impregnation assembly; 11. Inner cylinder; 12. Outer cylinder; 121. Insulation layer; 1211. First split insulation structure; 122. Limiting layer; 1221. First split side plate; 1222. Second split side plate; 1223. Hemmed strip; 13. Impregnation space; 14. First sealing component; 141. First connector; 15. Second sealing component; 151. Second connector; 16. Liquid level pipe;

[0043] 20. Radial constraint assembly; 21. Main body component; 211. Constraint ring; 212. Strip constraint plate; 213. Staggered node position; 22. Pushing component; 222. Clamping block; 223. First nut; 224. Second nut;

[0044] 30. Superconducting solenoid coil. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0046] like Figure 1 and Figure 7As shown, this application provides a reusable impregnation and detachable welding fixture suitable for superconducting solenoid coils, including an impregnation assembly 10 and a radial constraint assembly 20; the impregnation assembly 10 includes an inner cylinder 11 and an outer cylinder 12 sleeved outside the inner cylinder 11 at a first preset distance, and an impregnation space 13 for accommodating a superconducting solenoid coil 30 is formed between the outer wall surface of the inner cylinder 11 and the inner wall surface of the outer cylinder 12; wherein, the impregnation space 13 is an annular space, and a first sealing component 14 and a second sealing component 15 are respectively provided at both axial ends, and the first sealing component 14... 4. The second sealing component 15 is detachably and sealingly connected to the corresponding axial end of the inner cylinder 11 and the corresponding axial end of the outer cylinder 12, respectively. The radial constraint assembly 20 includes a main body component 21 sleeved on the outside of the outer cylinder 12 and a plurality of pushing components 22. Each pushing component 22 extends radially along the outer cylinder 12, and one end of each pushing component 22 is movably connected to the main body component 21 in the radial direction, and the other end abuts against the outer wall surface of the outer cylinder 12. The plurality of pushing components 22 are evenly distributed at intervals of a second preset distance on the outer periphery of the outer cylinder 12.

[0047] Specifically, in the embodiments of this application, the impregnation component 10 is the basic impregnation structure of the tooling, providing a sealed impregnation environment for the superconducting solenoid coil 30, realizing vacuum pressure filling and curing of the impregnating agent. The specific size of its first preset distance is not limited, and can be flexibly set according to the radial thickness of the superconducting solenoid coil 30 to adapt to the impregnation requirements of coils of different specifications and models.

[0048] The inner cylinder 11 is the inner support structure of the impregnation assembly 10, providing inner hole positioning for the superconducting solenoid coil 30 and ensuring the coaxiality of the coil in the impregnation space 13. It can be made of thin sheet metal rolled and welded, which is easy to process. The inner wall surface is smooth to avoid scratching the coil.

[0049] The outer cylinder 12 is the outer protective structure of the impregnation assembly 10. It works with the inner cylinder 11 to form an annular impregnation space 13, which limits the filling range of the impregnating agent. It can also be made of thin sheet metal or a split structure, which is convenient for disassembly and repeated welding.

[0050] The impregnation space 13 is an annular sealed space used to house the superconducting solenoid coil 30 and fill it with impregnating agent. Its axial length matches the axial length of the solenoid coil, ensuring that the entire coil is wrapped with impregnating agent.

[0051] The first sealing component 14 and the second sealing component 15 are axial sealing structures of the impregnation space 13, respectively, to seal both ends of the impregnation space 13 and prevent impregnating agent leakage. At the same time, they are detachably connected to the inner cylinder 11 and the outer cylinder 12, which facilitates the removal of the tooling after impregnation.

[0052] The radial constraint component 20 is a deformation-resistant constraint structure of the tooling, used to counteract the radial thrust generated by the pressure in the impregnation space 13 on the outer cylinder 12 during the impregnation process, and to prevent the outer cylinder 12 from deforming and bulging, thus affecting the impregnation effect.

[0053] The main component 21 is the support frame of the radial constraint assembly 20, providing an installation base for the pushing component 22. It is fitted outside the outer cylinder 12 and maintains a preset gap with the outer cylinder 12 to avoid direct contact with the outer cylinder 12 and causing interference.

[0054] The pushing component 22 is a radial constraint execution component, arranged radially along the outer cylinder 12. The specific size of the second preset distance is not limited and can be flexibly set according to the outer diameter of the outer cylinder 12 to ensure that the force of multiple pushing components 22 is evenly distributed on the outer periphery of the outer cylinder 12, thereby achieving uniform constraint on the outer cylinder 12. Furthermore, the pushing component 22 can move radially, making it easy to adjust the magnitude of the clamping force on the outer cylinder 12.

[0055] It should be understood that the number of push-off components 22 is unlimited; for example, it can be set to any number such as 20, 30, or 50.

[0056] In this application, the impregnation fixture first inserts the inner cylinder 11 into the inner hole of the solenoid coil 30 to position the coil's inner hole. Then, the outer cylinder 12 is fitted over the outside of the solenoid coil, placing the coil within the impregnation space 13 between the inner and outer cylinders 11, ensuring the coaxiality of the inner and outer cylinders 12. Subsequently, the first sealing component 14 and the second sealing component 15 are installed at the axial ends of the impregnation space 13, respectively, to achieve a sealed connection with the ends of the inner and outer cylinders 11 and 12, forming a sealed impregnation space 13. Then, the main body 21 of the radial constraint assembly 20 is fitted over the outside of the outer cylinder 12, and multiple pushing components 22 are adjusted to move radially along the outer cylinder 12, causing the other end of each pushing component 22 to gradually abut against the outer wall of the outer cylinder 12 until all pushing components 22 apply a clamping force to the outer cylinder 12, completing the assembly of the radial constraint assembly 20.

[0057] An impregnating agent, such as an epoxy resin solution, is injected into the sealed impregnation space 13 through the connection port on the first sealing component 14 or the second sealing component 15. Simultaneously, the radial restraint component 20's pushing component 22 counteracts the radial thrust of the impregnating agent on the outer cylinder 12, preventing deformation of the outer cylinder 12. After the impregnating agent is filled, a curing process is performed. During curing, the radial restraint component 20 maintains radial restraint on the outer cylinder 12. After the solenoid coil impregnation and curing are completed, the pushing component 22 is first adjusted to move radially in the opposite direction to separate it from the outer cylinder 12, and the radial restraint component 20 is removed. Then, the first sealing component 14 and the second sealing component 15 are removed. Subsequently, the outer cylinder 12 and the inner cylinder 11 are sequentially separated from the solenoid coil, completing the removal of the tooling. After cleaning the removed tooling components, it can be reused for impregnation operations of the same type of superconducting solenoid coil.

[0058] This application uses the impregnation assembly 10 to form an annular sealed impregnation space 13 adapted to the superconducting solenoid coil 30, which fits the structural characteristics of the solenoid coil, ensuring that the impregnating agent fully coats the coil and improving the impregnation effect. The radial constraint assembly 20 applies radial clamping force to the outer cylinder 12 through multiple evenly distributed pushing parts 22, effectively offsetting the internal pressure thrust during the impregnation process, preventing the outer cylinder 12 from deforming and bulging, improving the reliability of the impregnation operation, eliminating the need to increase the material thickness to improve the tooling's deformation resistance, and significantly reducing the tooling's processing cost and weight. Furthermore, the components of the impregnation assembly 10 and the radial constraint assembly 20 are detachably connected, allowing for non-destructive removal of the tooling after impregnation. After cleaning, the tooling components can be reused for impregnation operations of the same type of solenoid coil, greatly improving the utilization rate of the tooling, avoiding the waste of disposable tooling resources, and reducing the production and manufacturing cost of the superconducting coil.

[0059] In one embodiment, the inner cylinder 11 can be made of stainless steel sheet metal rolled and welded, and the outer cylinder 12 can be made of stainless steel sheet metal split structure. The first preset distance can be 50mm, which is suitable for superconducting solenoid coils with a radial thickness of 45mm. The first sealing component 14 and the second sealing component 15 can both be made of stainless steel cover plates, which are sealed to the ends of the inner cylinder 11 and the outer cylinder 12 by flange bolts, and the sealing surface is provided with silicone sealing gaskets. The main body component 21 of the radial constraint component 20 can be made of aluminum alloy profile splicing, and the pushing component 22 can be set to 12, with a second preset distance of 45mm, evenly distributed on the outer periphery of the outer cylinder 12. The pushing component 22 is a screw structure and is threadedly connected to the main body component 21. In this embodiment, the stainless steel sheet metal inner cylinder 11 and outer cylinder 12 have good corrosion resistance and are compatible with the chemical properties of the impregnating agent. The sealing components connected by flange bolts have good sealing effect, and the silicone sealing gasket further improves the sealing performance and prevents the impregnating agent from leaking. The 12 screw-type pushing components 22 are evenly distributed, and the constraint force on the outer cylinder 12 is more uniform. The lightweight design of the aluminum alloy main body component 21 facilitates the assembly and handling of tooling and is suitable for the impregnation operation of medium-sized superconducting solenoid coils.

[0060] In another embodiment, the inner cylinder 11 can be integrally molded from high-strength engineering plastic, while the outer cylinder 12 can be a split fiberglass structure. The first preset distance can be set to 30mm, suitable for small superconducting solenoid coils with a radial thickness of 25mm. The first sealing component 14 and the second sealing component 15 can both be plastic covers, connected to the ends of the inner cylinder 11 and the outer cylinder 12 via snap-fit ​​sealing. The main body 21 of the radial constraint assembly 20 can be a carbon fiber frame, and there can be six pushing components 22. The second preset distance can be 30mm. The pushing components 22 can be hydraulic push rod structures, hinged to the main body 21, and their radial movement can be adjusted via a hydraulic system. In this embodiment, engineering plastic and fiberglass materials are lightweight and have low processing costs. The snap-fit ​​connection facilitates quick assembly and disassembly of the tooling, improving work efficiency. The carbon fiber frame is high-strength and lightweight, and the hydraulic push rod pushing components 22 can achieve automated adjustment of the clamping force, suitable for batch impregnation operations of small superconducting solenoid coils, reducing manual operation intensity.

[0061] Based on the welding fixtures described above, in the embodiments of this application, such as... Figure 1 and Figure 2 As shown, the main component 21 is configured as a cage frame structure, one end of the pushing component 22 is threaded to the cage frame structure, and the other end has a protruding structure that presses against the outer wall of the outer cylinder 12.

[0062] Specifically, the cage-like frame structure is the specific structural form of the main component 21. It is made of spliced ​​profiles and has a hollow cage-like structure. Compared with a solid frame, it is lighter and requires less material, and has sufficient structural strength to withstand the reaction force of the pushing component 22. At the same time, the hollow structure makes it easy for operators to observe the status of the outer cylinder 12.

[0063] The threaded connection structure is the connection method between the pushing component 22 and the cage frame structure. The pushing component 22 can move radially along the outer cylinder 12 through the engagement of the thread. The adjustment accuracy is high, and the threaded connection has self-locking property, which can prevent the pushing component 22 from being displaced during operation and ensure the stability of the constraint force.

[0064] The protruding structure is the contact structure between the pushing component 22 and the outer cylinder 12. It increases the contact area between the pushing component 22 and the outer wall of the outer cylinder 12, avoids point contact between the pushing component 22 and the outer cylinder 12, which would cause local stress concentration in the outer cylinder 12 and prevent the outer cylinder 12 from being damaged by pressure.

[0065] In use, the main component 21 can adopt a cage-like frame structure. After being fitted onto the outside of the outer cylinder 12, one end of each of the multiple pushing components 22 is threaded to a preset mounting position on the cage-like frame, so that the pushing components 22 are arranged radially along the outer cylinder 12. The operator screws the pushing components 22, and using the screwing action of the threaded connection, the pushing components 22 move radially toward the outer cylinder 12 until the protruding structure is in close contact with the outer wall surface of the outer cylinder 12. Continue to screw the pushing components 22 until the pushing components 22 apply a preset radial force to the outer cylinder 12. The self-locking property of the threaded connection allows the pushing component 22 to maintain its current position and prevents the force from failing. During the impregnation process, the cage frame structure provides stable support for the pushing component 22. Multiple pushing components 22 with protruding structures apply uniform pressing force to the outer periphery of the outer cylinder 12, effectively offsetting the internal pressure thrust and preventing deformation of the outer cylinder 12. After impregnation, the pushing component 22 is rotated in the opposite direction, causing it to move radially away from the outer cylinder 12. The protruding structure separates from the outer cylinder 12, and the radial constraint assembly 20 can be removed.

[0066] In this embodiment, by designing the main component 21 as a cage-like frame structure, the weight and material cost of the radial constraint component 20 can be reduced while ensuring structural strength. The hollow structure facilitates observation of the outer cylinder 12 during operation, allowing for timely detection of abnormalities. The pushing component 22 can be threadedly connected to the cage-like frame, enabling precise adjustment of the radial movement of the pushing component 22. The clamping force can be flexibly adjusted according to changes in internal pressure during the impregnation process. The self-locking property of the thread ensures the stability of the constraint force, eliminating the need for an additional locking structure and simplifying the tooling structure. Furthermore, the protruding structure of the pushing component 22 increases the contact area with the outer cylinder 12, avoiding pressure loss caused by local stress concentration in the outer cylinder 12, while also making the clamping force transmission more uniform and improving the radial constraint effect.

[0067] In one embodiment, the cage frame structure can be welded from steel, suitable for impregnation fixtures of heavy-duty superconducting solenoid coils. The pushing component 22 can be a stainless steel screw, with an external thread at one end that mates with the internal thread of the cage frame, and a protruding structure at the other end that can be a circular stainless steel abutment plate, fixed to the screw by welding. In this embodiment, the steel cage frame structure has high strength and can withstand large reaction forces, making it suitable for the high internal pressure conditions during heavy-duty coil impregnation. The stainless steel screw is corrosion-resistant and has high strength, and the circular abutment plate can increase the contact area with the outer cylinder 12, avoiding pressure damage to the outer cylinder 12, while ensuring uniform transmission of the clamping force, effectively preventing deformation and bulging of the outer cylinder 12.

[0068] In another embodiment, the cage frame structure can be constructed from spliced ​​aluminum alloy profiles, suitable for impregnation fixtures of lightweight superconducting solenoid coils. The pushing component 22 can be an aluminum alloy screw, with an external thread at one end that engages with the internal thread of the cage frame, and a protruding structure at the other end that can be a rubber anti-slip abutment pad, which is fixed to the screw by adhesive. In this embodiment, the aluminum alloy cage frame is lightweight, facilitating the disassembly and handling of the fixture. The aluminum alloy screw is made of the same material as the frame, avoiding electrochemical corrosion. The rubber anti-slip abutment pad not only increases the contact area but also provides cushioning, preventing the hard pushing component from scratching the outer cylinder 12. At the same time, the anti-slip property of the rubber pad prevents relative sliding between the pushing component 22 and the outer cylinder 12.

[0069] Based on the above-described impregnation fixture, in the embodiments of this application, such as... Figure 1 and Figure 2 As shown, the main body component 21 has a cylindrical frame structure, and the main body component 21 includes a plurality of constraint rings 211 evenly spaced along the axial direction of the main body component 21 (see...). Figure 3 Multiple strip constraint plates 212 evenly distributed circumferentially along the main component 21 (see...) Figure 4Multiple constraint rings 211 and multiple strip constraint plates 212 are arranged alternately, and one end of the pushing member 22 is threaded to the staggered node position 213 of the constraint rings 211 and the strip constraint plates 212 to fix the staggered node position 213 of the constraint rings 211 and the strip constraint plates 212.

[0070] Specifically, the constraint ring 211 is a circumferential support structure of the main component 21. It is ring-shaped and sleeved on the outside of the outer cylinder 12. Its number is set according to the axial length of the outer cylinder 12 to ensure uniform constraint at different axial positions of the outer cylinder 12 and prevent local axial deformation of the outer cylinder 12. The number of constraint rings 211 is unlimited. For example, it can be set to any number such as 5 or 10.

[0071] The strip constraint plate 212 is an axial connection structure of the main component 21. It extends along the axial direction of the main component 21 and connects multiple constraint rings 211 into a whole to form a cylindrical frame structure. The number of the constraint rings 211 is set according to the outer diameter of the constraint rings 211 to ensure the stability of the frame structure. The number of strip constraint plates 212 is unlimited, for example, it can be set to 10, 20, etc.

[0072] It should be understood that the aforementioned staggered node position 213 refers to the connection position between the constraint ring 211 and the strip constraint plate 212. It can also provide an installation position for the pushing component 22. At the same time, the threaded connection of the pushing component 22 can fix the staggered node position 213, which can enhance the overall rigidity of the cylindrical frame structure and prevent the frame from deforming.

[0073] During assembly, for example, multiple constraint rings 211 can be arranged evenly at intervals along the axial direction and fixed to one of the strip constraint plates 212. Then, the remaining strip constraint plates 212 can be evenly distributed circumferentially on the outside of the constraint rings 211, so that the strip constraint plates 212 and the constraint rings 211 form multiple staggered node positions 213, which are spliced ​​into a cylindrical cage frame structure. Then, one end of the pushing member 22 is threaded to the staggered node position 213, and the pushing member 22 is screwed to move it radially along the outer cylinder 12 until the other end of the pushing member 22 abuts against the outer wall of the outer cylinder 12. The surface is subjected to a preset clamping force, and the threaded connection of the pushing component 22 locks the staggered node position 213 to prevent relative displacement between the constraint ring 211 and the strip constraint plate 212, thereby enhancing the overall rigidity of the main component 21. During the impregnation operation, multiple constraint rings 211 achieve radial constraint at different positions in the axial direction of the outer cylinder 12, and multiple strip constraint plates 212 can keep the spacing of the constraint rings 211 fixed, so that the outer cylinder 12 is subjected to uniform clamping force at all positions in the axial direction, effectively preventing local deformation and bulging of the outer cylinder 12 in the axial direction and improving the comprehensiveness of the radial constraint.

[0074] In this embodiment, the main component 21 is a cylindrical frame structure formed by the staggered arrangement of constraint rings 211 and strip constraint plates 212. The structure is simple in design and easy to process and assemble. The number and spacing of constraint rings 211 and the number of strip constraint plates 212 can be flexibly adjusted according to the size of the outer cylinder 12 to adapt to different specifications of impregnation assemblies 10, thus improving the adaptability of the tooling. Furthermore, the multiple constraint rings 211 are evenly distributed along the axial direction, achieving uniform constraint on all positions of the outer cylinder 12 along the axial direction, avoiding the problem of local axial deformation of the outer cylinder 12, thereby improving the stability of the radial constraint. The pushing component 22 is threadedly connected to the staggered node position 213, achieving radial constraint while fixing the staggered node position 213, which also enhances the overall rigidity of the main component 21, preventing deformation of the frame structure during operation, and further improving the stability of the radial constraint.

[0075] In one embodiment, the constraint rings 211 can be made of bent channel steel, and there can be 6 of them, evenly spaced 200mm apart along the axial direction of the main component 21. The strip constraint plates 212 can be made of flat steel, and there can be 10 of them, evenly distributed along the circumference of the main component 21. The staggered node positions 213 of the constraint rings 211 and the strip constraint plates 212 can be initially fixed by welding. The pushing component 22 is a high-strength screw, which is threaded to the staggered node positions 213 and locks the nodes. In this embodiment, the channel steel constraint rings have high structural strength and can withstand large radial reaction forces. The flat steel strip constraint plates have good connectivity. The 6 constraint rings can achieve multi-point axial constraint of the outer cylinder 12, and the 10 strip constraint plates can ensure the circumferential stability of the frame. The initial welding fixation combined with the locking of the pushing component 22 improves the overall rigidity of the main component 21 and is suitable for high internal pressure immersion conditions.

[0076] In another embodiment, the constraint rings 211 can be made of bent aluminum alloy profiles, with a quantity of 10, evenly spaced 300mm apart along the axial direction of the main component 21. The strip constraint plates 212 can be made of aluminum alloy profiles, with a quantity of 20, evenly distributed circumferentially along the main component 21. The staggered node positions 213 of the constraint rings 211 and strip constraint plates 212 can be initially connected by bolts. The pushing component 22 is an aluminum alloy screw, threadedly connected to the staggered node positions 213 and locking the nodes. In this embodiment, the aluminum alloy profiles are lightweight and corrosion-resistant, suitable for impregnation of solenoid coils in cold chain and humid environments. The cylindrical frame formed by 10 constraint rings and 20 strip constraint plates can meet the constraint requirements for impregnation of lightweight coils. The initial bolt connection, combined with the locking of the pushing component 22, enables the frame to be disassembled and spliced, facilitating the storage and transportation of tooling. Furthermore, the spacing and quantity of the constraint rings can be flexibly adjusted according to the size of the outer cylinder 12.

[0077] Based on the above-described structure, in the embodiments of this application, such as... Figure 1 and Figure 2 As shown, the pushing member 22 is configured as a rod-shaped structure, and one end of the pushing member 22 has a threaded portion. The threaded portion is threadedly connected to the staggered node position 213, and the first nut 223 and the second nut 224 are respectively threadedly connected to both sides of the threaded portion at the staggered node position 213. The protruding structure is configured as a clamping block 222 fixedly connected to the other end of the pushing member 22 (see...). Figure 5 ).

[0078] Specifically, the rod-shaped structure is the overall structural form of the pushing component 22. It is simple to process, has high strength, and is easy to arrange and apply force in the radial direction. It can adopt structural forms such as round rods and square rods.

[0079] The threaded part is the connection and adjustment structure of the pushing component 22. It is located at one end of the rod-shaped structure and achieves radial movement by engaging with the thread at the staggered node position 213. The thread accuracy is set according to the adjustment accuracy requirements.

[0080] The first nut 223 and the second nut 224 are a double locking structure of the pushing component 22. They are respectively located on both sides of the staggered node position 213. The threaded part is locked by tightening the double nuts to prevent the threaded connection from loosening due to vibration during operation.

[0081] The clamping block 222 is a specific structural form of the protrusion structure. It is an independent component that is fixedly connected to the other end of the pushing component 22. It can be flexibly designed according to the shape of the outer wall surface of the outer cylinder 12 to ensure the fit with the outer cylinder 12.

[0082] During installation, the threaded portion of one end of the pushing component 22 passes through the staggered node position 213 of the constraint ring 211 and the strip constraint plate 212, achieving a threaded connection with the main component 21. The first nut 223 and the second nut 224 are screwed onto the threaded portion, respectively, and are located on both sides of the staggered node position 213. The rod-shaped main body of the pushing component 22 is screwed on, so that the threaded portion is screwed along the threaded hole of the staggered node position 213, driving the pushing component 22 to move radially along the outer cylinder 12 until the clamping block 222 at the other end is in close contact with the outer wall surface of the outer cylinder 12. The pushing component 22 is continued to be screwed on, so that the clamping block 222 applies a clamping force to the outer cylinder 12. Then, tighten the first nut 223 and the second nut 224 respectively, so that both nuts are in close contact with the surface of the staggered node position 213, achieving double locking of the threaded part and preventing the threaded connection from loosening. During the impregnation operation, the locking structure of the double nuts ensures that the position of the pushing component 22 does not change, and can always apply a stable pressing force to the outer cylinder 12. The pressing block 222 is in close contact with the outer wall surface of the outer cylinder 12, achieving uniform transmission of the pressing force. After the impregnation is completed, first loosen the first nut 223 and the second nut 224, and then turn the pushing component 22 in the opposite direction to separate the pressing block 222 from the outer cylinder 12, thus releasing the radial constraint.

[0083] In this embodiment, the pushing component 22 is designed as a rod-shaped structure, which is simple to process and low in cost. The rod-shaped structure is also convenient for operators to tighten and adjust, improving work efficiency. The threaded part, combined with the locking structure of double nuts, achieves double locking of the pushing component 22, effectively preventing the threaded connection from loosening due to vibration during operation, ensuring the stability of the radial constraint force, and improving the reliability of the tooling. The clamping block 222 is an independent component that is fixedly connected to the pushing component 22. It can be flexibly designed according to the shape of the outer wall surface of the outer cylinder 12. For example, it can be designed as an arc surface that fits the cylindrical surface of the outer cylinder 12, improving the fit with the outer cylinder 12, making the clamping force transmission more uniform, and further improving the radial constraint effect. At the same time, the clamping block 222 can be replaced separately when damaged, without replacing the entire pushing component 22, reducing the maintenance cost of the tooling.

[0084] In one embodiment, the pushing component 22 is a steel round rod structure with a diameter of 20mm. The threaded part can be a fine-pitch external thread with a pitch of 1.5mm. The staggered node position 213 can be equipped with an internal thread to mate with the threaded part. The first nut 223 and the second nut 224 can be hexagonal thick nuts. The clamping block 222 can be an arc-shaped carbon steel block with the curvature of the arc surface matching the curvature of the outer wall surface of the outer cylinder 12. It is fixed to the other end of the round rod by welding. In this embodiment, the steel round rod has high strength and can withstand large clamping forces. The fine-pitch thread has high adjustment accuracy, which facilitates precise control of the clamping force. The hexagonal thick nut has a good locking effect. The arc-shaped carbon steel block fits completely with the cylindrical surface of the outer cylinder 12, so that the clamping force is evenly transmitted to the outer cylinder 12, avoiding local stress concentration, and adapting to the high constraint requirements of heavy-duty coil impregnation.

[0085] In another embodiment, the pushing component 22 can be an aluminum alloy square rod structure with a cross-section of 20mm*20mm. The threaded part can be a coarse external thread with a pitch of 2mm. The staggered node position 213 is provided with an internal thread to mate with the threaded part. The first nut 223 and the second nut 224 can be flange nuts. The clamping block 222 can be an arc-shaped rubber block with the curvature of the arc surface consistent with the curvature of the outer wall surface of the outer cylinder 12. It is fixed to the other end of the square rod through a threaded connection. In this embodiment, the aluminum alloy square rod is lightweight and corrosion-resistant, the coarse thread has a fast tightening speed, improving the tooling assembly efficiency, and the flange nut has a built-in anti-slip pad for better locking effect. The arc-shaped rubber block has a high degree of fit with the outer cylinder 12 and also has a buffering effect, which can prevent the hard pushing component from scratching and damaging the outer cylinder 12. At the same time, the rubber block can be disassembled and replaced through a threaded connection to adapt to outer cylinders 12 with different curvatures.

[0086] Based on the above-described structure, in the embodiments of this application, such as... Figures 6 to 8 As shown, the outer cylinder 12 is provided with a heat insulation layer 121 and a limiting layer 122 stacked in the radial direction (see...). Figure 7 The impregnation space 13 is located between the inner wall of the insulation layer 121 and the outer wall of the inner cylinder 11, and the other end of each pushing member 22 abuts against the outer wall of the limiting layer 122 (see...). Figure 1 ).

[0087] Specifically, the heat insulation layer 121 is the inner structure of the outer cylinder 12, adjacent to the impregnation space 13. It is used to block the heat generated during the curing process of the impregnating agent from being transferred to the limiting layer 122, preventing the limiting layer 122 from undergoing thermal deformation due to temperature changes and affecting the radial constraint effect. Its material can be a non-metallic material with good heat insulation performance. The limiting layer 122 is the outer structure of the outer cylinder 12, serving as a rigid support structure for the outer cylinder 12. It bears the clamping force of the radial constraint component 20, ensuring the structural strength of the outer cylinder 12 and preventing the outer cylinder 12 from deforming under the combined action of clamping force and internal pressure. Its material can be a rigid metallic material. The heat insulation layer 121 and the limiting layer 122 are tightly bonded together, with the heat insulation layer 121 located on the inner side and the limiting layer 122 located on the outer side, achieving the dual functions of heat insulation and rigid support. The layered structure facilitates disassembly and replacement.

[0088] During the impregnation and curing process of the superconducting solenoid coil 30, the heat generated by the curing reaction of the impregnating agent is blocked by the heat insulation layer 121, preventing it from being transferred to the outer limiting layer 122. This prevents the limiting layer 122 from undergoing thermal deformation due to temperature rise and ensures that the structural shape of the limiting layer 122 remains unchanged. The other ends of the multiple pushing parts 22 of the radial constraint assembly 20 abut against the outer wall surface of the limiting layer 122, applying radial clamping force to the limiting layer 122. The limiting layer 122 is a rigid structure, which can uniformly transfer the clamping force to the inner heat insulation layer 121, and then from the heat insulation layer 121 to the outer wall of the impregnation space 13, thereby achieving radial constraint on the impregnation space 13 and preventing the impregnation space 13 from deforming due to internal pressure. The heat insulation effect of the heat insulation layer 121 ensures that the limiting layer 122 is always at room temperature, avoiding uneven clamping force transmission caused by thermal deformation of the limiting layer 122, and ensuring that the radial constraint effect remains stable.

[0089] This embodiment of the application achieves functional separation of heat insulation and rigid support by adopting a stacked structure of heat insulation layer 121 and limiting layer 122 for the outer cylinder 12. The heat insulation layer 121 effectively blocks the heat generated by the curing of the impregnating agent and prevents the limiting layer 122 from thermal deformation, thus ensuring the structural integrity of the outer cylinder 12. The limiting layer 122 is a rigid structure that bears the clamping force of the radial constraint component 20, ensuring the deformation resistance of the outer cylinder 12, while uniformly transmitting the clamping force and improving the radial constraint effect. The pushing component 22 abuts against the outer wall surface of the limiting layer 122, avoiding direct contact with the heat insulation layer 121, preventing the rigid pushing component from causing pressure damage to the heat insulation layer 121, ensuring the heat insulation performance of the heat insulation layer 121, and the stacked structure facilitates the replacement of the heat insulation layer 121 or the limiting layer 122 after individual damage, reducing the maintenance cost of the tooling.

[0090] In one embodiment, the heat insulation layer 121 can be made of a high-temperature resistant ceramic fiber board with a thickness of 10 mm, and the limiting layer 122 can be made of stainless steel sheet with a thickness of 3 mm. The heat insulation layer 121 and the limiting layer 122 are tightly bonded together with a high-temperature resistant adhesive to form an outer cylinder 12, which is suitable for impregnation of solenoid coils with high-temperature curing impregnating agents. In this embodiment, the high-temperature resistant ceramic fiber board has good heat insulation performance, which can effectively block the large amount of heat generated by the high-temperature curing impregnating agent and prevent the stainless steel limiting layer 122 from thermal deformation. The high-temperature resistant adhesive ensures the connection stability between the heat insulation layer and the limiting layer under high-temperature conditions. The stainless steel limiting layer 122 has high rigidity and can effectively withstand radial clamping force, preventing the outer cylinder 12 from deforming and making it suitable for high-temperature impregnation conditions.

[0091] In another embodiment, the insulation layer 121 can be made of polyurethane foam board with a thickness of 8mm, and the limiting layer 122 can be made of aluminum alloy sheet metal with a thickness of 2mm. The insulation layer 121 and the limiting layer 122 can be detachably connected by a snap-fit ​​structure to form an outer cylinder 12, suitable for impregnating solenoid coils with room-temperature curing impregnating agents. In this embodiment, the polyurethane foam board has good thermal insulation performance and is lightweight, making it suitable for the low heat release conditions of room-temperature curing impregnating agents. The aluminum alloy limiting layer 122 is lightweight and corrosion-resistant. The snap-fit ​​structure enables a detachable connection between the insulation layer and the limiting layer, facilitating the removal and cleaning of the tooling after impregnation. At the same time, the insulation layer or the limiting layer can be quickly replaced if damaged, improving the maintenance efficiency of the tooling.

[0092] Based on the above-described structure, in the embodiments of this application, such as... Figures 6 to 14 As shown, the insulation layer 121 includes a first split insulation structure 1211 (see...) Figure 10 The first and second split-type heat insulation structures (not shown) are both configured with a semi-circular cross-section, and are detachably connected at their circumferential cross-sections; the limiting layer 122 includes the first split-type side plate 1221 (see...). Figure 11 ) and the second split side plate 1222 (see Figure 12 The first split side plate 1221 and the second split side plate 1222 are configured with a semi-circular cross section, and the first split side plate 1221 and the second split side plate 1222 are detachably connected at their circumferential cross sections.

[0093] Specifically, in this embodiment, the first split heat insulation structure 1211 and the second split heat insulation structure are split structures of the heat insulation layer 121. Both have semi-circular cross-sections and, when spliced ​​together, form a complete cylindrical heat insulation layer 121. The detachable connection structure at its circumferential cross-section can be in the form of buckles, bolts, splicing grooves, etc., for easy assembly and disassembly. The first split side plate 1221 and the second split side plate 1222 are split structures of the limiting layer 122. Both have semi-circular cross-sections. After splicing, a complete cylindrical limiting layer 122 is formed. The detachable connection structure at its circumferential cross-section is compatible with the heat insulation layer 121 to ensure the overall structural integrity of the outer cylinder 12. The semi-cylindrical structure is a separate design of the heat insulation layer 121 and the limiting layer 122. It fits the cylindrical structure of the outer cylinder 12 and can be spliced ​​without obvious gaps, ensuring heat insulation effect and structural strength. At the same time, the separate semi-cylindrical structure is easy to fit on the outside of the solenoid coil to avoid interference with the coil.

[0094] During assembly, after the solenoid coil is positioned, the first split heat insulation structure 1211 and the second split heat insulation structure are respectively fastened to the outside of the solenoid coil from both sides. They are then spliced ​​together at the circumferential cross-section using a detachable connection structure to form a complete cylindrical heat insulation layer 121. Next, the first split side plate 1221 and the second split side plate 1222 are respectively fastened to the outside of the heat insulation layer 121 from both sides. They are then spliced ​​together at the circumferential cross-section using a detachable connection structure to form a complete cylindrical limiting layer 122, forming a layered outer cylinder 12, so that the coil is placed within the impregnation space 13.

[0095] After impregnation, first remove the detachable connection between the two separate side plates of the limiting layer 122, and separate the first separate side plate 1221 and the second separate side plate 1222 from the heat insulation layer 121 respectively; then remove the detachable connection between the two separate heat insulation structures of the heat insulation layer 121, and separate the first separate heat insulation structure 1211 and the second separate heat insulation structure from the solenoid coil respectively, thus completing the removal of the outer cylinder 12. The split structure allows the removal process to be carried out without destructive operations on the tooling, ensuring the integrity of the tooling components.

[0096] This embodiment of the application adopts a split design with both the heat insulation layer 121 and the limiting layer 122 as semi-cylindrical structures, which facilitates the assembly and disassembly of the outer cylinder 12. The snap-fit ​​splicing method can be quickly fitted onto the outside of the solenoid coil, avoiding interference with the coil and improving the assembly efficiency of the tooling. Moreover, the split structure allows for tooling removal without destructive operations after impregnation, ensuring the structural integrity of the tooling components and facilitating reuse after cleaning. Furthermore, the split structure of the heat insulation layer 121 and the limiting layer 122 can both be detachably connected, forming a complete cylindrical structure without obvious gaps after splicing, ensuring the heat insulation effect of the heat insulation layer 121 and the structural strength of the limiting layer 122. At the same time, the detachable connection structure facilitates the individual replacement of tooling components, reducing maintenance costs. In addition, the split design makes the weight of each component of the outer cylinder 12 lighter, making it easier for operators to handle and operate, especially suitable for impregnation tooling of large-diameter solenoid coils.

[0097] In one embodiment, the first and second split heat insulation structures can be semi-circular high-temperature nylon structures with a splicing groove and a boss fitting structure on their circumferential cross-sections to achieve detachable splicing. The first and second split side plates 1221 and 1222 can be semi-circular stainless steel sheet metal structures with flange edges on their circumferential cross-sections, achieving detachable splicing via bolts. In this embodiment, the splicing groove and boss fitting structure of the high-temperature nylon heat insulation structure is tightly spliced, resulting in good heat insulation. The flange bolt connection structure of the stainless steel side plates has high strength and can withstand large radial tightening forces, making it suitable for impregnation fixtures for heavy-duty solenoid coils. The detachability of the bolt connection ensures convenient disassembly of the fixture, and the structure is stable and secure after splicing.

[0098] In another embodiment, the first and second split heat insulation structures can be semi-circular foamed silicone structures with Velcro fasteners on their circumferential sections for detachable assembly. The first and second split side panels 1221 and 1222 can be semi-circular aluminum alloy sheet metal structures with snap-fit ​​structures on their circumferential sections for detachable assembly. In this embodiment, the Velcro assembly method of the foamed silicone heat insulation structure is convenient to operate, allowing for quick assembly and disassembly. The snap-fit ​​structure of the aluminum alloy side panels can be screwed on to complete the assembly, improving the efficiency of tooling assembly and disassembly. It is suitable for batch impregnation operations of lightweight solenoid coils, and the foamed silicone and aluminum alloy materials are lightweight, facilitating quick operation by operators.

[0099] Based on the above-described impregnation fixture, in the embodiments of this application, such as... Figures 12 to 14 As shown, the first sealing component 14 (see Figure 13 ) is set as the first sealing cover plate, and the second sealing component 15 (see Figure 14 The second sealing cover is configured as the limiting layer 122, and both ends of the limiting layer 122 along its axial direction are formed with rolled edges 1223 (see...). Figure 12 The first sealing cover is connected to the rolled edge strip 1223 at one end of the limiting layer 122, and the second sealing cover is connected to the rolled edge strip 1223 at the other end of the limiting layer 122.

[0100] Specifically, the first and second sealing covers are the specific structural forms of the first and second sealing components. They can be plate-like structures, with dimensions matching the axial end face dimensions of the immersion space 13 to achieve sealing at the end of the immersion space 13. They can be made of sheet metal, plastic, or other materials, with a sealing gasket on the inner side to improve the sealing effect. The rolled edge strip 1223 is an extension structure at both ends of the limiting layer 122 along the axial direction. It is integrally formed with the limiting layer 122, increasing the structural strength of the end of the limiting layer 122 and preventing deformation at the end of the limiting layer 122. At the same time, it provides an installation base for the sealing covers, making the connection between the sealing covers and the outer cylinder 12 more convenient and secure.

[0101] During assembly, after the outer cylinder 12 is assembled, the first sealing cover is placed inside or outside the rolled edge strip 1223 at one end of the limiting layer 122. This can be achieved by welding or snap-fitting, ensuring the edge of the first sealing cover fits tightly against the rolled edge strip 1223. Simultaneously, the inner surface of the first sealing cover is in close contact with the axial ends of the inner cylinder 11 and the insulation layer 121, thus sealing one end of the impregnation space 13. The second sealing cover is placed inside or outside the rolled edge strip 1223 at the other end of the limiting layer 122, achieving the same sealing effect at the other end of the impregnation space 13. The rolled edge strip 1223 serves to limit and fix the sealing cover, preventing displacement due to internal pressure during impregnation. After impregnation, the first and second sealing covers can be removed directly from the inside of the rolled edge strip 1223 to complete the removal of the sealing components. The structural design of the rolled edge strip 1223 will not damage the sealing covers and the outer cylinder 12, ensuring the integrity of the tooling components.

[0102] This embodiment of the application adopts a cover plate structure for the first and second sealing components, which is simple to process and low in cost. The sealing surface of the plate structure is flat and has a high degree of fit with the ends of the inner cylinder 11 and outer cylinder 12, improving the sealing effect. The rolled edges 1223 at both ends of the limiting layer 122 are integrally formed with the limiting layer 122, which not only increases the structural strength of the ends of the limiting layer 122 and prevents end deformation, but also provides precise installation positioning for the sealing cover plate, making the assembly of the sealing cover plate more convenient. No additional positioning structure is required, improving the assembly efficiency. Efficiency is improved; the connection between the sealing cover and the edge strip 1223 is a close-fitting connection, which does not require additional fasteners. After impregnation, the sealing cover can be quickly removed, improving the efficiency of tooling removal. Moreover, the close-fitting connection will not cause any damage to the tooling components, ensuring the integrity of the tooling components and facilitating reuse. Furthermore, the radially inward extension structure of the edge strip 1223 ensures that the sealing cover is installed inside the outer cylinder 12, avoiding interference with the radial constraint component 20 and ensuring the normal assembly and use of the radial constraint component 20.

[0103] In one embodiment, the first and second sealing covers can be made of thick stainless steel plates with high-temperature resistant silicone gaskets adhered to their inner sides. The limiting layer 122 is a sheet metal part made of stainless steel, with right-angle rolled edges 1223 at both axial ends, each 20mm wide. The sealing covers and the rolled edges 1223 are temporarily fixed by spot welding. After impregnation, the weld points are removed by grinding. In this embodiment, the stainless steel thick plate sealing covers have high strength and can withstand the internal pressure during impregnation. The high-temperature resistant silicone gaskets improve the sealing effect and prevent impregnation agent leakage. The right-angle rolled edges provide a stable installation base for the sealing covers. The temporary spot welding fixation further ensures the positional stability of the sealing covers. After impregnation, the sealing covers can be removed by grinding the weld points without damaging the tooling components. The ground rolled edges can be spot welded again, allowing for the reuse of the tooling.

[0104] In another embodiment, the first and second sealing covers can be made of thin aluminum alloy sheets with foamed rubber gaskets adhered to their inner sides. The limiting layer 122 can be a sheet metal part made of aluminum alloy, with rounded edges 1223 at both axial ends. The sealing covers and the rounded edges 1223 are detachably fixed by elastic clips. In this embodiment, the aluminum alloy sheet sealing covers are lightweight and easy to assemble and disassemble. The foamed rubber gaskets have good sealing effect and cushioning effect. The rounded edges prevent sharp edges from scratching operators. The detachable fixing method of the elastic clips does not require welding or grinding, and the assembly and disassembly of the sealing covers can be completed quickly, improving the reusability of the tooling and making it suitable for batch impregnation operations of lightweight solenoid coils.

[0105] Based on the above-described impregnation fixture, in the embodiments of this application, such as... Figures 8 to 12 As shown, the insulation layer 121 is a nylon sheet, and the limiting layer 122 is a sheet metal part. The nylon sheet can be made of high-temperature nylon material, which has good heat insulation and heat preservation properties, high-temperature deformation resistance, and a certain mechanical strength. It can withstand slight pressure and low heat radiation during the immersion process, and the material surface is smooth, making it less likely to stick to resin-based impregnating agents, facilitating tooling cleaning after immersion. This material has good processability and can be made into a split semi-cylindrical structure to meet the assembly requirements of the outer cylinder 12. The sheet metal part can be made of stainless steel sheet metal, aluminum alloy sheet metal, etc., which has excellent structural rigidity and deformation resistance, can effectively withstand the pushing force of the radial restraint component 20, and at the same time offset the radial thrust generated by the internal pressure of the immersion space 13. The sheet metal part can be processed by simple processes such as bending, welding, and snap-fitting, with low processing tolerance requirements, and can be made into a split structure with rolled edges, which has good lamination fit with the insulation layer 121.

[0106] This application achieves the separation and synergy of heat insulation and rigid support functions by combining the heat insulation layer 121 (made of nylon sheet) and the limiting layer 122 (made of sheet metal). The nylon sheet solves the heat insulation and anti-sticking requirements during the impregnation process, while the sheet metal solves the deformation resistance and load-bearing requirements of the outer cylinder 12. The two complement each other to improve the overall performance of the outer cylinder 12. Furthermore, the nylon sheet is low in cost and simple to process, requiring no precision machining equipment, which can significantly reduce the processing cost and cycle of the heat insulation layer 121. The sheet metal uses general-purpose processing materials, and its bending and welding processes are mature and easy to process, effectively controlling the manufacturing cost of the limiting layer 122. The anti-stick properties of the nylon sheet allow the impregnating agent to be prevented from sticking to the inner wall of the heat insulation layer 121 without additional complex treatment; residual impregnating agent can be removed simply by wiping during cleaning. The limiting layer 122 of the sheet metal has high structural strength and is not prone to permanent deformation during repeated clamping and disassembly processes; its accuracy can be restored simply by straightening, improving the reusability of the outer cylinder 12. Moreover, the nylon sheet is lightweight and the sheet metal can be designed with thin walls. The combination of the two allows the outer cylinder 12 to achieve a lightweight design. Compared with the traditional thick-walled one-piece outer cylinder, it is lighter and easier for operators to assemble, disassemble and transport, thus improving the efficiency of the immersion operation.

[0107] In one embodiment, the heat insulation layer 121 is a nylon sheet made of glass fiber reinforced high-temperature nylon material. The mechanical strength and high temperature resistance of the nylon material after adding glass fiber are further improved, and it can withstand the temperature and pressure of medium-temperature curing impregnating agent; the limiting layer 122 is a sheet metal part made of stainless steel.

[0108] In another embodiment, the heat insulation layer 121 can be a nylon sheet made of ordinary high-temperature nylon material, which is suitable for low-heat working conditions of room temperature curing impregnating agents, with lower cost and easier processing; the limiting layer 122 can be a sheet metal part made of aluminum alloy sheet metal, which is made into a split semi-cylindrical structure by bending and snapping process, with rolled edge strips 1223 integrally formed at both ends of the axial direction.

[0109] Based on the above-described impregnation fixture, in the embodiments of this application, the outer wall surface of the inner cylinder 11, the inner wall surface of the outer cylinder 12, the inner wall surface of the first sealing component 14, and the inner wall surface of the second sealing component 15 are all coated with Teflon or fluororesin material (not shown). Teflon (polytetrafluoroethylene) and fluororesin both possess extremely low surface energy, do not chemically adhere to resin-based impregnating agents, and are resistant to chemical corrosion, high temperatures, and wear. They can withstand the chemical properties of the impregnating agent and the temperature environment of the curing process. The coating thickness can be any thickness between 0.05 mm and 0.2 mm.

[0110] The coating surface refers to all the inner surfaces of the tooling that are in direct contact with the impregnating agent, including the outer wall surface of the inner cylinder 11, the inner wall surface of the outer cylinder 12, and the inner wall surfaces of the first sealing component 14 and the second sealing component 15, forming a complete anti-stick coating surface to ensure that the impregnating agent only combines with the superconducting solenoid coil 30 and does not stick to the tooling.

[0111] The coating process can employ conventional methods such as spraying, roller coating, and dip coating, and can be flexibly selected according to the material and structure of the tooling components. After curing, the coating is tightly bonded to the tooling substrate, is not easy to peel off, and can withstand repeated disassembly, wiping, and cleaning.

[0112] In practice, before tooling assembly, the inner wall surfaces of the inner cylinder 11, outer cylinder 12, first sealing component 14, and second sealing component 15 on the impregnation side can be surface-treated to remove burrs, oil stains, and impurities, ensuring a smooth and clean surface. Subsequently, Teflon or fluororesin material can be uniformly coated onto all the aforementioned inner wall surfaces using processes such as spraying or dipping. Depending on the material properties, high-temperature or room-temperature curing can be performed to form a dense, uniform, and pinhole-free non-stick coating, ensuring a strong bond between the coating and the substrate. During the impregnation operation of the superconducting solenoid coil 30, the resin-based impregnating agent fills the impregnation space 13 coated with the non-stick coating, directly contacting the coatings on each inner wall surface of the tooling. Due to the low surface energy characteristics of the Teflon or fluororesin coating, the impregnating agent only fills the gaps between the winding turns and layers of the superconducting solenoid coil 30, without adhering to the coating on the inner wall of the tooling. Furthermore, the smooth surface of the coating allows the impregnating agent to flow uniformly within the space, ensuring the uniformity of coil impregnation.

[0113] After the impregnating agent has cured, when the first sealing component 14 and the second sealing component 15 are removed, and the inner cylinder 11, the outer cylinder 12 and the superconducting solenoid coil 30 are separated, the anti-stick coating can effectively prevent the inner wall of the tooling from sticking to the cured impregnating agent and the coil winding, thus achieving non-destructive and rapid separation of the tooling and the coil. When cleaning the tooling, only a wiping cloth or soft brush with a small amount of cleaning agent is needed to remove the uncured impregnating agent remaining on the inner wall. There is no need for high-intensity grinding or scraping. The cleaned coating still maintains good anti-stick performance and structural integrity, and can be directly used for the next impregnation operation of the same type of coil.

[0114] In one embodiment, a high-temperature curing Teflon coating process can be used for the stainless steel inner cylinder 11, outer cylinder 12, and sealing cover. A 0.15mm thick Teflon coating is sprayed onto the inner wall of the impregnation side and cured at high temperature (e.g., 380°C). This process is suitable for impregnating heavy-duty and medium-pressure superconducting solenoid coils using high-temperature curing epoxy resin impregnating agents. In this embodiment, the high-temperature curing Teflon coating has strong adhesion to the stainless steel substrate, excellent high-temperature resistance, and can withstand the high-temperature environment of epoxy resin curing. Furthermore, the coating has good density, is free of pinholes, and provides better anti-sticking and sealing effects. It is suitable for the high-requirement vacuum pressure impregnation operations of heavy-duty coils, and the coating maintains good anti-sticking performance even after multiple uses.

[0115] In another embodiment, for the aluminum alloy inner cylinder 11, outer cylinder 12, and plastic sealing cover, a room-temperature curing fluoropolymer impregnation process can be used. A fluoropolymer coating with a thickness of 0.08 mm is applied to the inner wall of the impregnation side, followed by room-temperature curing. This process is suitable for impregnating lightweight, atmospheric-pressure superconducting solenoid coils using a room-temperature curing polyurethane impregnating agent. In this embodiment, the room-temperature curing fluoropolymer coating does not require high-temperature heating and is suitable for tooling components that are not heat-resistant, such as plastics. The impregnation process allows the coating to evenly cover the corners and edges of the tooling's inner wall, eliminating any dead spots. The fluoropolymer coating has good adhesion to the aluminum alloy substrate and possesses excellent anti-stick and anti-corrosion properties, meeting the requirements for room-temperature impregnation conditions. It is easy to clean and suitable for small-batch, lightweight coil impregnation operations in laboratories.

[0116] Based on the above-described impregnation fixture, in the embodiments of this application, such as... Figures 6 to 14 The outer cylinder 12 is further provided with a liquid level pipe 16 communicating with the immersion space 13. The liquid level pipe 16 is transparent; specifically, it can be connected to the second split side plate 1222 of the outer cylinder 12, and the second split side plate 1222 is provided with a connector communicating with the immersion space 13 (see...). Figure 12 Furthermore, the outer wall surface of the first sealing component 14 is provided with a first connector 141 communicating with the impregnation space 13 (see...). Figure 13 The outer wall of the second sealing component 15 is provided with a second connector 151 that communicates with the immersion space 13 (see...). Figure 14 ).

[0117] Specifically, the transparent liquid level tube 16 is a liquid level monitoring component for the impregnation space 13. It is sealed and connected to the side wall of the outer cylinder 12. It can be made of materials such as high borosilicate glass, transparent acrylic, and transparent polytetrafluoroethylene. It has the characteristics of temperature resistance, chemical corrosion resistance, and high light transmittance. It allows for direct observation of the liquid level height, filling status, and liquid level changes during the curing process of the impregnating agent in the impregnation space 13. A sealing element is provided at the connection between the liquid level tube 16 and the outer cylinder 12 to ensure vacuum sealing performance.

[0118] The first connector 141 and the second connector 151 are connecting components for the immersion space 13. They can adopt standardized connector structures and can be selected according to operational requirements, such as pagoda connectors, KF flange connectors, and external thread connectors. The connectors can be welded or integrally formed with the sealing components. The inner side is connected to the immersion space 13, and the outer side is used to connect various immersion auxiliary equipment. The connectors have excellent sealing performance and can meet the high airtightness requirements of vacuum pressure immersion.

[0119] The sealing component is a matching component for the connection between the liquid level tube 16 and the outer cylinder 12, the joint and the sealing component. It can be made of materials such as silicone gaskets and fluororubber sealing rings, and can be flexibly selected according to the temperature and pressure conditions of the immersion operation to ensure the vacuum sealing performance of the connection and prevent the immersion agent from leaking and the outside air from entering the immersion space 13.

[0120] During the tooling assembly process, a connecting hole is opened at a preset position on the side wall of the outer cylinder 12. The two ends of the transparent liquid level tube 16 are vacuum sealed to the connecting hole through a sealing element, so that the liquid level tube 16 and the immersion space 13 form a connected cavity, ensuring that the liquid level height in the liquid level tube 16 is consistent with the liquid level height in the immersion space 13. At the same time, the first connector 141 and the second connector 151 are fixedly installed at preset positions on the outer wall surfaces of the first sealing component 14 and the second sealing component 15, respectively, to ensure a sealed connection between the connector and the sealing component, without any risk of air or liquid leakage.

[0121] In the vacuum pressure impregnation operation of the superconducting solenoid coil 30, the quick connection of various auxiliary equipment is achieved through connectors. The first connector 141 is connected to the vacuum pump and the glue injection tank, and the second connector 151 is connected to the glue injection device and the pressure gauge. First, the vacuum pump is started, and air is extracted from the impregnation space 13 through the first connector 141 to create a vacuum environment. The operator can observe the vacuum status within the impregnation space 13 through the transparent level tube 16 (the preset vacuum level is reached when no bubbles are generated). After the vacuum level is reached, the vacuum pump is turned off, and resin is injected into the impregnation space 13 through the second connector 151. The operator can visually and accurately observe the level of the impregnating agent through the transparent level tube 16, control the amount of adhesive injected, and ensure that the impregnating agent completely covers the superconducting solenoid coil 30 without any dead corners. After the impregnating agent is filled, according to the process requirements, the impregnation space 13 can be pressurized by connecting a pressure device through the second connector 151. The overflow tank connected to the first connector 141 can collect the excess impregnating agent that overflows during the pressurization process. During the curing process, the operator can monitor the changes in the level of the impregnating agent in real time through the level tube 16, promptly detect abnormalities such as leakage and lack of liquid, and ensure the smooth progress of the impregnation operation.

[0122] After the impregnating agent has cured, the impregnation space 13 is first depressurized through the first connector 141. Then, the auxiliary equipment is removed, and the liquid level pipe 16, the first connector 141, and the second connector 151 are separated from the main body of the tooling and cleaned separately. The cleaned liquid level pipe 16 and connectors can be reassembled and used, and the standardized connectors can be adapted to different types of auxiliary equipment, improving the reusability of the tooling.

[0123] In this embodiment, the transparent liquid level tube 16 enables real-time visualization and monitoring of the impregnating agent level within the impregnation space 13, solving the problem that the liquid level cannot be directly observed during the impregnation process of traditional tooling. Operators can accurately control the amount of adhesive injected to ensure that the coil is completely covered, avoiding impregnation defects caused by insufficient filling. At the same time, abnormalities such as leakage and lack of liquid during the curing process can be detected in a timely manner, greatly improving the reliability and yield of the impregnation operation.

[0124] The first connector 141 and the second connector 151 can adopt a standardized structural design, realizing modular docking of functions such as glue injection, vacuuming, pressurization, pressure relief, and residual glue collection. They can flexibly connect to various impregnation auxiliary equipment without requiring additional modifications to the tooling, adapting to the complete process requirements of vacuum pressure impregnation of superconducting solenoid coils, thus improving the versatility and process adaptability of the tooling. Furthermore, both the liquid level tube 16 and the connectors can adopt a vacuum-sealed connection structure, combined with silicone, fluororubber, and other sealing components, ensuring the high airtightness of the impregnation space 13, meeting the process requirements of vacuum pressure impregnation, preventing impregnating agent leakage and the ingress of outside air, and avoiding problems such as decreased coil insulation performance and magnetic field distortion due to poor sealing, thereby ensuring the impregnation quality of the superconducting solenoid coil. Furthermore, both the liquid level tube 16 and the connector are detachable structures, and can be removed and cleaned separately after immersion without affecting the disassembly and reuse of the main tooling body. In addition, the standardized transparent liquid level tube and connector are common industrial accessories, which are convenient to purchase and low in cost. They can be replaced separately after damage without replacing the entire main tooling body, thus reducing the maintenance and replacement costs of the tooling.

[0125] In another embodiment, two symmetrically distributed high borosilicate glass level tubes 16 with a diameter of 20mm are provided on the outer side of the outer cylinder 12. Both ends are vacuum-sealed to the outer cylinder 12 via fluororubber sealing rings, suitable for high-temperature and high-pressure impregnation conditions. The first sealing component 14 is equipped with a KF flange-type first connector 141, and the second sealing component 15 is equipped with a pagoda-type second connector 151. In this embodiment, the high borosilicate glass level tubes 16 are resistant to high temperature and high pressure, and can be used for a long time under high-temperature curing and high-pressure impregnation conditions. The two symmetrically distributed level tubes can achieve multi-angle level monitoring, resulting in more accurate data. The KF flange-type connector has excellent vacuum sealing performance, suitable for high-vacuum impregnation requirements. The pagoda-type connector can be quickly connected to the injection hose, making operation convenient. Overall, it is suitable for vacuum pressure impregnation operations of heavy-duty and medium-pressure superconducting solenoid coils.

[0126] In another embodiment, a transparent acrylic liquid level tube 16 with a diameter of 15mm can be installed on the outside of the outer cylinder 12. Both ends are connected to the outer cylinder 12 via a snap-fit ​​seal using silicone gaskets, suitable for room temperature and pressure immersion conditions. The first sealing component 14 is equipped with an externally threaded first connector 141, and the second sealing component 15 is equipped with a quick-connect second connector 151. In this embodiment, the transparent acrylic liquid level tube 16 is lightweight and low-cost, and the snap-fit ​​connection facilitates quick assembly, disassembly, and cleaning. The externally threaded connector can be precisely connected to a small vacuum pump, and the quick-connect connector can be quickly docked with a glue-injection syringe. Operation is simple, requiring no specialized tools. The entire system is suitable for laboratory-level small-batch immersion operations of lightweight, small-sized superconducting solenoid coils, and the overall fixture is lightweight, easy to move and operate.

[0127] Based on all the above embodiments, the reusable impregnation and detachable welding fixture for superconducting solenoid coils provided in this application, during assembly:

[0128] First, the tooling components are pre-treated, such as the inner cylinder 11, outer cylinder limiting layer 122, first sealing cover plate, and second sealing cover plate made of stainless steel sheet metal are ground and cleaned, and Teflon coating is applied to the inner wall surface of the immersion side and cured at high temperature; the heat insulation layer 121 made of high temperature nylon material is spliced ​​into a complete cylinder, and then stacked with the limiting layer 122 to form the outer cylinder 12.

[0129] Then, the coil positioning and inner cylinder assembly involves placing the superconducting solenoid coil 30 flat on the mounting platform and inserting the inner cylinder 11 into the inner hole of the coil to complete the precise positioning of the inner hole of the coil.

[0130] Subsequently, the split outer cylinder 12 is fastened to the outer periphery of the coil to form a complete cylinder. The first sealing cover plate, the second sealing cover plate and the rolled edge strips 1223 at both ends of the outer cylinder 12 are attached and connected. Temporary sealing and fixing are achieved by spot welding to form a sealed annular immersion space 13.

[0131] Further, the liquid level tube and connector are assembled on the side wall of the outer cylinder 12 and sealed to the transparent liquid level tube 16. The first connector 141 and the second connector 151 are respectively installed on the sealing cover plate, and auxiliary equipment such as vacuum pump and glue injection device are connected. Negative pressure leak detection test is performed to ensure that there is no leakage.

[0132] Further assemble the radial constraint component, for example, fit the radial constraint component 20 of the cage frame structure onto the outside of the outer cylinder 12, screw the rod-shaped pushing component 22 so that the pressing block 222 evenly abuts against the outer periphery of the outer cylinder 12, lock the pushing component 22 with the first nut 223 and the second nut 224, adjust to the preset radial constraint force, and complete the overall tooling assembly.

[0133] When dismantling the tooling as a whole:

[0134] First, loosen the first nut 223 and the second nut 224 of the pushing component 22, and then twist the pushing component 22 in the opposite direction to separate the clamping block 222 from the outer cylinder 12, thereby removing the radial constraint component 20 of the cage frame structure.

[0135] Then, the auxiliary equipment and the level tube 16 are removed, for example, the auxiliary equipment connected to each joint is removed, the immersion space 13 is depressurized, and then the transparent level tube 16 and the first joint 141 and the second joint 151 are removed for preliminary cleaning.

[0136] Subsequently, as shown in Figure 15, the sealing components and the outer cylinder 12 and inner cylinder 11 can be removed sequentially along the dotted line in the figure. For example, the spot welds of the sealing cover plate and the rolled edge strip 1223 can be removed by grinding, and the first sealing cover plate and the second sealing cover plate can be taken out from both ends of the outer cylinder 12.

[0137] When further dismantling the outer cylinder 12 and the inner cylinder 11, the heat insulation layer 121 and the limiting layer 122 of the split outer cylinder 12 are specifically separated from the outer periphery of the superconducting solenoid coil 30. Then the inner cylinder 11 is pulled out from the inner hole of the coil to achieve non-destructive separation of the tooling and the coil.

[0138] Finally, the tooling is cleaned and repositioned. For example, the residual impregnating agent on the inner wall of each part of the tooling is cleaned with a wiping cloth, the deformed sheet metal parts are straightened, the worn parts of the rolled edge strip 1223 are repaired by welding, and the cleaned parts are classified and stored for repeated assembly and use when the same type of coil is impregnated next time.

[0139] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. In order to provide a deep understanding of this utility model, many specific details are included in the above description, and this utility model may also be implemented without using these details. In addition, in order to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0140] It should be noted that in this specification, 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.

[0141] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", 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 that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model 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. Therefore, they should not be construed as limitations on the utility model.

[0142] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0143] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" 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 embodiment based on the specific circumstances.

[0144] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A reusable dip and drag tooling for superconducting solenoid coils, characterized by, The application relates to a reusable impregnation detachable welding tool for a superconducting solenoid coil. The impregnation assembly comprises an inner cylinder, an outer cylinder which is sleeved outside the inner cylinder at a first preset distance, and an impregnation space between the outer wall surface of the inner cylinder and the inner wall surface of the outer cylinder for accommodating the superconducting solenoid coil; wherein the impregnation space is annular, and first and second sealing components are arranged at the axial ends of the annular space respectively, and the first and second sealing components are detachably and sealingly connected with the corresponding axial end of the inner cylinder and the corresponding axial end of the outer cylinder respectively. The radial constraint assembly comprises a main component which is sleeved outside the outer cylinder, and a plurality of pushing components; wherein each pushing component extends along the radial direction of the outer cylinder, and one end of each pushing component is movably connected with the main component along the radial direction, and the other end of each pushing component abuts against the outer wall surface of the outer cylinder, and the plurality of pushing components are uniformly distributed on the outer periphery of the outer cylinder at a second preset distance. The outer cylinder is provided with a heat insulation layer and a limiting layer in the radial direction, and the impregnation space is located between the inner wall surface of the heat insulation layer and the outer wall surface of the inner cylinder, and the other end of each pushing component abuts against the outer wall surface of the limiting layer.

2. The reusable impregnation detachable welding tool for a superconducting solenoid coil according to claim 1, wherein the main component is provided as a cage frame structure, one end of the pushing component is threadedly connected with the cage frame structure, and the other end of the pushing component is provided with a protruding structure which is extruded against the outer wall surface of the outer cylinder.

3. The reusable impregnation detachable welding tool for a superconducting solenoid coil according to claim 2, wherein the main component is provided as a cylindrical frame structure, and the main component comprises a plurality of constraint rings which are uniformly and spacedly arranged in the axial direction of the main component, and a plurality of strip-shaped constraint plates which are uniformly distributed in the circumferential direction of the main component, the plurality of constraint rings and the plurality of strip-shaped constraint plates are arranged in an interlaced mode, and one end of the pushing component is threadedly connected with the interlaced node position of the constraint rings and the strip-shaped constraint plates to fix the interlaced node position of the constraint rings and the strip-shaped constraint plates.

4. The reusable impregnation detachable welding tool for a superconducting solenoid coil according to claim 3, wherein the pushing component is provided as a rod-shaped structure, one end of the pushing component is provided with a threaded portion which is threadedly connected with the interlaced node position, and the threaded portion is threadedly connected with a first nut and a second nut which are respectively located on the two sides of the interlaced node position, and the protruding structure is provided as an abutting block which is fixedly connected with the other end of the pushing component.

5. The reusable impregnation detachable welding tool for a superconducting solenoid coil according to any one of claims 1 to 4, wherein the heat insulation layer comprises a first split heat insulation structure and a second split heat insulation structure, the cross section of the first split heat insulation structure and the second split heat insulation structure is semicircular, and the first split heat insulation structure and the second split heat insulation structure are detachably connected at the circumferential section. ​ ​ ​ ​ ​ The limiting layer comprises a first sub-lateral plate and a second sub-lateral plate, and the first sub-lateral plate and the second sub-lateral plate are semicircular in cross section, and the first sub-lateral plate and the second sub-lateral plate are detachably connected at the circumferential section thereof. 6.The reusable impregnation detachable welding tool for superconducting solenoid coil according to claim 5, wherein, The first plugging component is a first plugging cover plate, the second plugging component is a second plugging cover plate, and the limiting layer is provided with a hem bar at each end thereof along the axial direction, the first plugging cover plate is connected with the hem bar at one end of the limiting layer, and the second plugging cover plate is connected with the hem bar at the other end of the limiting layer. 7.The reusable impregnation detachable welding tool for superconducting solenoid coil according to claim 5, wherein, The heat insulation layer is a nylon plate, and the limiting layer is a sheet metal part. 8.The reusable impregnation detachable welding tool for superconducting solenoid coil according to any one of claims 1 to 4, wherein, The outer wall surface of the inner cylinder, the inner wall surface of the outer cylinder, the inner wall surface of the first plugging component, and the inner wall surface of the second plugging component are coated with a Teflon coating or a fluororesin coating. 9.The reusable impregnation detachable welding tool for superconducting solenoid coil according to any one of claims 1 to 4, wherein, The outer surface of the outer cylinder is further provided with a liquid level tube in communication with the impregnation space, and the liquid level tube is transparent; and The outer wall surface of the first plugging component is provided with a first joint in communication with the impregnation space, and the outer wall surface of the second plugging component is provided with a second joint in communication with the impregnation space.

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