Dipping device for superconducting coil of star simulator

Abstract

The utility model discloses a steeping device for a superconducting coil of a star simulator. The steeping device comprises a shell assembly with a cavity inside and a steeping assembly arranged in the cavity, the shell assembly comprises a heat insulation barrel, a heat insulation bottom plate and a heat insulation top cover, wherein the heat insulation bottom plate and the heat insulation top cover are fixedly installed at the two ends of the heat insulation barrel in the height direction of the heat insulation barrel. The impregnation assembly comprises an impregnation retention barrel which is fixed in the cavity and is used for accommodating the superconducting coil, a heating component which is arranged on the periphery of the impregnation retention barrel in a surrounding manner, and a glue feeding component; the outer wall of the impregnation retention barrel and the inner wall of the heat insulation barrel are arranged at intervals in the radial direction, so that the heat insulation barrel does not make contact with the impregnation retention barrel, heat dissipation is reduced when the heating component heats the impregnation retention barrel, and it is guaranteed that the temperature of an impregnation area is stable and consistent; therefore, the risk of incomplete curing of the epoxy resin caused by heat dissipation is reduced, and the magnet performance of the superconducting coil is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to superconducting magnet field for stellarator belongs specifically to a kind of stellarator superconducting coil's impregnation device. BACKGROUND

[0002] Stellarator is a kind of toroidal magnetic confinement device aiming at realizing controllable nuclear fusion, and it is parallel to Tokamak as the two core directions of magnetic confinement fusion research. Its core design concept is to constrain high-temperature plasma through helical magnetic field. This magnetic field is generated by a set of carefully arranged external coils, and the twisted shape of the coil simulates the motion trajectory of the plasma in the toroidal vacuum chamber. Unlike Tokamak, it does not rely on the magnetic field generated by the plasma current itself, so it has better stability in principle and is more suitable for the continuous power generation needs of future fusion power plants. Although its structure is more complex and the construction cost is higher, in the long-term exploration of controllable nuclear fusion, stellarator is considered as one of the most potential technical paths, providing important support for mankind to ultimately realize clean and unlimited fusion energy.

[0003] However, since the superconducting coil is in a high-voltage alternating current environment, it is necessary to ensure good electrical contact between the outer surface of the coil and the core laminations to prevent air gap discharge. Air gap discharge in a high-voltage electric field can cause insulation performance to degrade, and in severe cases, it can cause a malfunction. Therefore, it is usually necessary to impregnate the superconducting coil, inject epoxy resin suitable for low-temperature environments into the superconducting magnet, fill the gaps in the superconducting magnet coil and solidify it, to ensure the stability of the superconducting coil under electromagnetic force during operation of the superconducting magnet, while providing electrical insulation between layers and turns of the superconducting coil, ensuring stable and reliable operation of the superconducting magnet at low temperature.

[0004] However, in the process of impregnating the superconducting coil in the prior art, the superconducting coil needs to be placed in the impregnation barrel for heating during the heating of the epoxy resin, and then the barrel body of the impregnation barrel is heated to achieve the heating of the epoxy resin. However, during the heating process, heat will escape from the shell of the impregnation barrel, resulting in uneven heating of the local epoxy resin, which in turn leads to incomplete impregnation of the superconducting coil, incomplete filling of the gaps in the superconducting coil, and reduced magnet performance of the superconducting coil. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problem that in the prior art, the heat escapes from the shell of the impregnation barrel during heating in the process of impregnating the superconducting coil, resulting in uneven heating of the local epoxy resin, which in turn leads to incomplete impregnation of the superconducting coil, and reduces the magnet performance of the superconducting coil.

[0006] To solve the above problems, the utility model provides a kind of dip device of star simulator superconducting coil, including the cavity with the shell assembly in the inside, and the dip assembly being set in cavity;Wherein, shell assembly includes heat insulation cylinder, heat insulation bottom plate and heat insulation top cover are fixedly installed in the height direction of heat insulation cylinder both ends of heat insulation cylinder.

[0007] Dip assembly includes dip retention bucket being fixed in cavity, containing superconducting coil, and heating component is surrounded in the outer periphery of dip retention bucket, and glue feeding component;Wherein, one end of glue feeding component extends outside shell assembly, the other end penetrates shell assembly and enters dip retention bucket;And, the outer wall of dip retention bucket and the inner wall of heat insulation cylinder are radially spaced from each other.

[0008] Adopt the above technical scheme, when superconducting coil is dipped by this dip device of star simulator superconducting coil, first, superconducting coil is placed in dip retention bucket, then epoxy resin is transported to glue feeding component by external glue feeding part, glue feeding component is injected into dip retention bucket, so that epoxy resin completely immerges gap in superconducting coil;At this time, the cavity of shell assembly is vacuumized, so that the cavity of shell assembly is in vacuum state, then heating component is heated to dip retention bucket, so that the temperature of dip retention bucket is increased, epoxy resin in dip retention bucket is solidified, the dip of superconducting coil is completed, and the purpose of superconducting coil having insulation performance is realized;In this process, since heating component is surrounded in the outer periphery of dip retention bucket, heating component can heat dip retention bucket evenly, so that epoxy resin in dip retention bucket is heated evenly, and each place of epoxy resin can be reliably solidified when epoxy resin completely immerges gap in superconducting coil, so that the electrical insulation effect between superconducting coil layers and turns is better, and the stability of superconducting coil under electromagnetic force during operation is ensured.

[0009] In addition, since the outer wall of dip retention bucket and the inner wall of heat insulation cylinder are radially spaced from each other, heat insulation cylinder does not contact dip retention bucket, and since the cavity of shell assembly is vacuumized, the heat conduction efficiency of the inner cavity of shell assembly is significantly reduced after vacuumization, so that the heat dissipation of heating component when heating dip retention bucket is reduced, and the temperature of dip area is stable and consistent;Further, the risk of incomplete solidification of epoxy resin due to heat dissipation is reduced, and each place of epoxy resin can be reliably solidified, which further ensures the stable and reliable operation of superconducting coil at low temperature, and improves the magnet performance of superconducting coil.

[0010] And, since the outer wall of the immersion holding barrel and the inner wall of the heat insulation cylinder are arranged radially away from each other, the heat insulation cylinder is not in contact with the immersion holding barrel, so the heat insulation cylinder will not be heated; thus, during the heating process, even if the staff touches the heat insulation cylinder, they will not be scalded, so the immersion device of the star simulator superconducting coil also has the advantages of safety and reliability.

[0011] Further, the embodiment of the utility model discloses an immersion device of star simulator superconducting coil, the opening of immersion holding barrel faces heat insulation top cover, and the inside is provided with the center support of supporting superconducting coil, wherein the center support is protrudingly arranged at the center position of immersion holding barrel along the height direction, and the lower end is fixedly connected with the bottom wall of immersion holding barrel, and the upper end extends along the height direction, and when the superconducting coil is accommodated in the immersion holding barrel, the superconducting coil is sleeved on the outer periphery of the center support.

[0012] By adopting the above technical scheme, the center support occupies the space in the immersion holding barrel, thereby reducing the amount of epoxy resin, lowering unnecessary waste of epoxy resin and reducing the immersion cost.

[0013] Further, the embodiment of the utility model discloses an immersion device of star simulator superconducting coil, the shell assembly further includes an annular fixing rod, and the annular fixing rod is fixedly installed on the inner peripheral wall surface of the heat insulation cylinder and located above the immersion holding barrel.

[0014] And, the immersion assembly further includes a high-temperature immersion film, wherein the high-temperature immersion film covers the inner wall surface of the immersion holding barrel and the outer wall surface of the center support, and the peripheral edge of the high-temperature immersion film is fixedly wound on the annular fixing rod.

[0015] By adopting the above technical scheme, the high-temperature immersion film covers the inner wall surface of the immersion holding barrel and the outer wall surface of the center support, thereby protecting the immersion holding barrel and the center support from being polluted by epoxy resin, and when the immersion of a superconducting coil is completed, the high-temperature immersion film can be replaced without cleaning the immersion holding barrel, thereby having the advantage of high immersion efficiency.

[0016] In addition, the circumferential edge of the high-temperature impregnation film is fixedly wound on the annular fixing rod, which can reduce the risk of displacement of the high-temperature impregnation film due to high-temperature expansion or air flow disturbance, and prevent the high-temperature impregnation film from falling off to the bottom of the impregnation retention barrel during the impregnation process, so as to prevent the epoxy resin from flowing out of the impregnation retention barrel, causing the inner cavity of the shell assembly to be contaminated and the epoxy resin to be wasted, and causing the impregnation to fail, thereby causing the superconducting coil to lose superconductivity.

[0017] Further, the embodiment of the utility model discloses an impregnation device for star simulator superconducting coil, and the first gap is formed between the high-temperature impregnation film and the inner wall surface of the impregnation retention barrel, and the second gap is formed between the high-temperature impregnation film and the outer wall surface of the central support.

[0018] The technical scheme is adopted, and the first gap and the second gap are filled with anti-boiling beads. When the size of the superconducting coil to be impregnated changes in the radial direction of the impregnation retention barrel after the impregnation of one superconducting coil is completed, the anti-boiling beads with different diameters can be replaced when the next high-temperature impregnation film is replaced, so that the sizes of the first gap and the second gap in the radial direction of the impregnation retention barrel are changed, the size of the impregnation area in the radial direction of the impregnation retention barrel is changed, and the superconducting coil with the changed size can be reliably supported by the central support.

[0019] The embodiment of the utility model discloses an impregnation device for star simulator superconducting coil, and the first gap is formed between the high-temperature impregnation film and the inner wall surface of the impregnation retention barrel, and the second gap is formed between the high-temperature impregnation film and the outer wall surface of the central support.

[0020] The technical scheme is adopted, and the first gap and the second gap are filled with anti-boiling beads. When the size of the superconducting coil to be impregnated changes in the radial direction of the impregnation retention barrel after the impregnation of one superconducting coil is completed, the anti-boiling beads with different diameters can be replaced when the next high-temperature impregnation film is replaced, so that the sizes of the first gap and the second gap in the radial direction of the impregnation retention barrel are changed, the size of the impregnation area in the radial direction of the impregnation retention barrel is changed, and the superconducting coil with the changed size can be reliably supported by the central support.

[0021] Further, the embodiment of the utility model discloses an impregnation device for star simulator superconducting coil, and the first gap is formed between the high-temperature impregnation film and the inner wall surface of the impregnation retention barrel, and the second gap is formed between the high-temperature impregnation film and the outer wall surface of the central support.

[0022] The inner surface of the heat insulation bottom plate has a heat insulation protrusion protruding towards the cavity, and the impregnation retention barrel is fixed on the heat insulation protrusion.

[0023] By means of the technical scheme, the protruding part is matched with the shape of the bottom of the immersion retention barrel, an insulation layer is formed between the immersion retention barrel and the insulation bottom plate under the premise of reducing the heat conduction area of the immersion retention barrel to the outside, the risk of heat conduction to the insulation bottom plate through the bottom wall of the immersion retention barrel is further reduced, the temperature of the immersion area is stable and consistent, the risk of incomplete curing of the epoxy resin due to heat dissipation is further reduced, and each part of the epoxy resin can be reliably cured.

[0024] In addition, by means of the heat insulation protrusion, the shell assembly can always be in a safe operating temperature, and the structural life is not affected.

[0025] Further, the embodiment of the utility model discloses an immersion device for star simulator superconducting coil, and the heat insulation cylinder is a Dewar straight cylinder, and at least one air outlet is formed in the sidewall of the Dewar straight cylinder, and a vacuum adapter is fixedly installed on each air outlet.

[0026] By means of the technical scheme, the protruding part is matched with the shape of the bottom of the immersion retention barrel, an insulation layer is formed between the immersion retention barrel and the insulation bottom plate under the premise of reducing the heat conduction area of the immersion retention barrel to the outside, the risk of heat conduction to the insulation bottom plate through the bottom wall of the immersion retention barrel is further reduced, the temperature of the immersion area is stable and consistent, the risk of incomplete curing of the epoxy resin due to heat dissipation is further reduced, and each part of the epoxy resin can be reliably cured.

[0027] The embodiment of the utility model discloses an immersion device for star simulator superconducting coil, and the heat insulation top cover is a butterfly head arranged on the top of the Dewar straight cylinder, the butterfly head is in the shape of a spherical segment, and a visual window is arranged on the butterfly head.

[0028] By means of the technical scheme, the heat insulation top cover is arranged as a butterfly head, the curved surface structure in the shape of a spherical segment of the butterfly head enhances the pressure resistance of the shell assembly after the inner cavity is vacuumized while ensuring the sealing property, the visual window is arranged, the liquid level of the epoxy resin in the immersion retention barrel can be observed through the visual window, the epoxy resin can be completely immersed in the superconducting coil, the illumination member is arranged, the illumination member is fixed to the inner wall of the heat insulation cylinder and located above the annular fixing rod, the position design avoids the interference with the immersion retention barrel and the high-temperature immersion film, the light is projected from top to bottom to cover the entire immersion area, the immersion process and the resin flow state of the superconducting coil can be clearly observed in the vacuum environment, the immersion process is visualized, and direct basis is provided for accurately controlling the heating temperature, the epoxy resin injection amount and the curing state.

[0029] Further, the embodiment of the utility model discloses a kind of impregnation devices of star simulator superconducting coil, glue feeding component includes glue pipe and glue pipe;Wherein, glue pipe is fixedly installed on butterfly head, and one end of glue pipe is communicated with the glue feeding portion outside shell assembly, and the other end penetrates butterfly head and is inserted into Dewar straight cylinder body and is located above impregnation retention barrel, one end of glue pipe is fixed to the other end of glue pipe, and the other end extends to the bottom of impregnation retention barrel along height direction.

[0030] By the above technical scheme, the glue pipe extends from the end of the glue pipe to the bottom of the impregnation retention barrel along the height direction. When the epoxy resin is impregnated into the superconducting coil, it is filled from bottom to top. This progressive glue injection design effectively prevents the residual of air bubbles, ensures the uniform distribution of the epoxy resin in the impregnation retention barrel, and achieves the purpose of completely filling every gap of the superconducting coil.

[0031] Further, the embodiment of the utility model discloses a kind of impregnation devices of star simulator superconducting coil, and the impregnation device further includes the moving assembly of bearing shell assembly;Wherein, shell assembly is fixed on the bearing plate of moving assembly, and the lower portion of bearing plate is provided with a plurality of moving wheels;And, at least a pair of fixed ears are further fixedly arranged on the outer wall surface of heat insulation cylinder body, and each pair of fixed ears is symmetrically arranged on both sides of heat insulation cylinder body.

[0032] By the above technical scheme, when the impregnation device needs to be moved in the laboratory or workshop, the position of the entire impregnation device can be changed by the moving assembly. Compared with the carrying method, the impregnation device is more safe and reliable when changing position. By setting the fixed ears, the manufactured impregnation device can be loaded by hoisting during transportation. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The overall structure schematic diagram of the impregnation device of star simulator superconducting coil provided by the embodiment of the utility model is shown in the figure.

[0034] Figure 2 The schematic diagram of the overall structure of the impregnation device of star simulator superconducting coil provided by the embodiment of the utility model is shown in the figure.

[0035] Figure 3 The sectional view of the impregnation device of star simulator superconducting coil provided by the embodiment of the utility model is shown in the figure.

[0036] Figure 4 The overall structure schematic diagram of the glue feeding component provided by the embodiment of the utility model is shown in the figure.

[0037] Figure 5 The Figure 4 The enlarged view of part A in the figure.

[0038] MARKING OF FIGURE:

[0039] 1. A housing assembly;

[0040] 10. An insulation cylinder;

[0041] 100. A dewar straight cylinder; 101. A suction port; 102. A vacuum adapter; 103. A fixing lug;

[0042] 11. An insulation top cover;

[0043] 110. An annular fixing rod; 111. A butterfly seal head; 112. A visual window; 113. An illuminating member;

[0044] 12. An insulation bottom plate;

[0045] 120. An insulation protrusion;

[0046] 2. An impregnation assembly;

[0047] 20. An impregnation holding bucket;

[0048] 200. A central support member;

[0049] 21. A heating member;

[0050] 22. A glue feeding member;

[0051] 220. A glue feeding pipe; 221. A glue feeding pipe;

[0052] 23. A high temperature impregnation film;

[0053] 24. An anti-boil bead;

[0054] 25. A temperature sensor;

[0055] 3. A moving assembly;

[0056] 30. A bearing plate; 31. A moving wheel;

[0057] 4. A superconducting coil;

[0058] H. Height direction. DETAILED DESCRIPTION

[0059] As mentioned in the background, the prior art impregnation device in the process of impregnating the superconducting coil, since the impregnation device in the process of heating the epoxy resin, the superconducting coil needs to be placed in the impregnation bucket for heating, and then the barrel of the impregnation bucket is heated to heat the epoxy resin. However, during the heating process, heat will escape from the shell of the impregnation barrel, resulting in uneven heating of the local epoxy resin, and thus incomplete impregnation of the superconducting coil, incomplete filling of the gap in the superconducting coil, and reduced magnet performance of the superconducting coil.

[0060] To solve the above problems, the utility model provides a kind of dip device of star simulator superconducting coil, including the cavity having inside shell assembly, and setting in the dip component of cavity;Wherein, shell assembly includes heat insulation cylinder, heat insulation bottom plate and heat insulation top cover fixedly installed in the height direction of heat insulation cylinder both ends of heat insulation cylinder.

[0061] Specifically, when the dip device of star simulator superconducting coil is used to dip superconducting coil, first, superconducting coil is placed in dip retention barrel, then epoxy resin is transported to glue feeding component by external transport device, and epoxy resin is injected into dip retention barrel, so that epoxy resin completely immerses gap in superconducting coil;At this time, the cavity of shell assembly is vacuumized, so that the cavity of shell assembly is hollow, then dip retention barrel is heated by heating component, so that the temperature of dip retention barrel rises, and epoxy resin in dip retention barrel is solidified, the dip process of superconducting coil is completed, so that superconducting coil has insulation performance;In this process, heating component is arranged around the outer periphery of dip retention barrel, so that heating component can heat dip retention barrel uniformly, so that epoxy resin in dip retention barrel is heated uniformly, and epoxy resin can be reliably solidified when it completely immerses gap in superconducting coil, so that the electrical insulation effect between superconducting coil layers and turns is better, and the stability of superconducting coil under electromagnetic force during operation is ensured.

[0062] To make the purpose, technical scheme and advantages of the utility model more clear, the embodiments of the utility model will be described in further detail below with reference to the drawings.

[0063] As shown in Figure 1 And Figure 2 A kind of dip device of star simulator superconducting coil, including the cavity having inside shell assembly 1, and setting in the dip component 2 of cavity;Wherein, shell assembly 1 includes heat insulation cylinder 10, and heat insulation bottom plate 12 and heat insulation top cover 11 respectively fixedly installed in the height direction H of heat insulation cylinder 10 both ends of heat insulation cylinder 10 correspondingly, and in height direction H, heat insulation top cover 11 is located directly above heat insulation bottom plate 12.

[0064] Specifically, the impregnation assembly 2 comprises an impregnation holding barrel 20 fixed in the cavity for accommodating the superconducting coil 4, a heating member 21 surrounding the outer periphery of the impregnation holding barrel 20, and a glue feeding member 22 extending out of the shell assembly 1 at one end and extending into the impregnation holding barrel 20 at the other end; and the outer wall of the impregnation holding barrel 20 and the inner wall of the heat insulation cylinder 10 are arranged radially away from each other, so that the heat insulation cylinder 10 does not contact the impregnation holding barrel 20, and thus the heat insulation cylinder 10 is not heated when the superconducting coil 4 is impregnated. Therefore, even if the staff touches the heat insulation cylinder 10 during the heating process, they will not be scalded, and thus the impregnation device has the advantages of safety and reliability. It should be understood that, in order to facilitate the vacuumization of the inner cavity of the heat insulation cylinder 10, an air outlet 101 is formed through the side wall of the heat insulation cylinder 10.

[0065] More specifically, when the superconducting coil 4 is impregnated by the star simulator superconducting coil impregnation device, the superconducting coil 4 is first placed in the impregnation holding barrel 20, and then the epoxy resin is fed to the glue feeding member 22 through the external glue feeding part, and the epoxy resin is injected into the impregnation holding barrel 20 by the glue feeding member 22, so that the epoxy resin completely immerses the gaps in the superconducting coil 4. At this time, the cavity of the shell assembly 1 is vacuumized, so that the cavity of the shell assembly 1 is in a vacuum state, and then the impregnation holding barrel 20 is heated by the heating member 21, so that the temperature of the impregnation holding barrel 20 rises, the epoxy resin in the impregnation holding barrel 20 is cured, the impregnation of the superconducting coil 4 is completed, and the purpose of the superconducting coil 4 having insulation performance is achieved. In this process, since the heating member 21 surrounds the outer periphery of the impregnation holding barrel 20, the heating member 21 can uniformly heat the impregnation holding barrel 20, so that the epoxy resin in the impregnation holding barrel 20 is uniformly heated, and each part of the epoxy resin can be reliably cured when the epoxy resin completely immerses the gaps in the superconducting coil 4, so that the electrical insulation effect between the layers and turns of the superconducting coil 4 is better, and thus the stability of the superconducting coil 4 under the action of electromagnetic force during operation of the superconducting coil 4 is ensured. It should be understood that the glue feeding member 22 feeds liquid epoxy resin, and the external glue feeding part can be a rotor pump, a gear pump, etc., which mainly serves to feed liquid epoxy resin to the glue feeding member 22.

[0066] In addition, since the outer wall of the immersion retention barrel 20 and the inner wall of the heat insulation cylinder 10 are arranged radially away from each other, the heat insulation cylinder 10 does not contact the immersion retention barrel 20, and the cavity of the shell assembly 1 is subjected to vacuumization treatment. After vacuumization, the heat conduction efficiency of the inner cavity of the shell assembly 1 can be significantly reduced, thereby reducing the heat dissipation of the heating member 21 when heating the immersion retention barrel 20, ensuring the temperature stability and consistency of the immersion area. Further, the risk of incomplete curing of the epoxy resin due to heat dissipation is reduced, and each part of the epoxy resin can be reliably cured, further ensuring the stable and reliable operation of the superconducting coil 4 at low temperature, and improving the magnet performance of the superconducting coil 4. It should be understood that the magnet performance of the superconductor mainly reflects its complete diamagnetism and shielding effect on the magnetic field.

[0067] It should be noted that the superconducting coil of the star simulator can be a special-shaped superconducting coil, a planar superconducting coil, etc., which is not limited in the present embodiment.

[0068] First, the connection relationship between the heat insulation cylinder 10 and the heat insulation bottom plate 12 and the heat insulation top cover 11 is further explained.

[0069] Optionally, in an embodiment, along the height direction H, the top end of the heat insulation cylinder 10 is provided with a first annular flange, and the bottom end is provided with a second annular flange. When the heat insulation bottom plate 12 and the heat insulation top cover 11 are installed on the heat insulation cylinder 10, the first annular flange is attached to the side of the heat insulation top cover 11 close to the heat insulation cylinder 10, and then fixed and connected by a plurality of fixing bolts. The second annular flange is attached to the side of the heat insulation bottom plate 12 close to the heat insulation cylinder 10, and then fixed and connected by a plurality of bolts. It should be understood that the number of bolts can be set to 2, 3, 4, etc., which is not limited in the present embodiment. In addition, when the heat insulation bottom plate 12 and the heat insulation top cover 11 are fixed and connected to the heat insulation cylinder 10 by bolts, a plurality of threaded holes are provided on the heat insulation top cover 11 and the first annular flange, and a plurality of threaded holes are also provided on the heat insulation bottom plate 12 and the second annular flange.

[0070] In addition, it should be noted that the fixed connection mode between the heat insulation cylinder 10 and the heat insulation bottom plate 12 and the heat insulation top cover 11 can also be riveting, clamping, etc., which is not limited in the present embodiment.

[0071] Optionally, in an embodiment, a sealing ring is further arranged between the first annular flange and the side of the heat insulation top cover 11 close to the heat insulation cylinder 10, and a sealing ring is also arranged between the second annular flange and the side of the heat insulation bottom plate 12 close to the heat insulation cylinder 10, thereby reducing the risk of air leakage of the shell assembly 1 after the inner cavity of the shell assembly 1 is vacuumized.

[0072] The specific structure and arrangement mode of the shell assembly 1 and the immersion assembly 2 are further explained below.

[0073] In an embodiment, as shown in Figure 2 In order to further prevent the loss of heat on the impregnation holding barrel 20, the inner surface of the heat insulation bottom plate 12 is provided with heat insulation protrusions 120 protruding towards the cavity, and the impregnation holding barrel 20 is fixed on the heat insulation protrusions 120; the heat insulation protrusions 120 form an insulation layer between the impregnation holding barrel 20 and the heat insulation bottom plate 12, further reducing the risk of heat loss through the bottom wall surface of the impregnation holding barrel 20 to the heat insulation bottom plate 12, ensuring the temperature stability and consistency of the impregnation area; reducing the risk of incomplete curing of the epoxy resin due to heat dissipation, so that each place of the epoxy resin can be reliably cured.

[0074] In addition, by providing the heat insulation protrusions 120, the shell assembly 1 can always be in a safe operating temperature, without affecting the structural life.

[0075] Specifically, the structure and arrangement of the heat insulation protrusions 120 are not limited.

[0076] Optionally, in an implementable embodiment, the heat insulation protrusions 120 are heat insulation blocks fixed on the heat insulation bottom plate 12, and the heat insulation blocks are adapted to the shape of the bottom of the impregnation holding barrel 20.

[0077] Optionally, in another implementable embodiment, the heat insulation protrusions 120 are protrusions extending upwards from the inner surface of the heat insulation bottom plate 12, and the protrusions are adapted to the shape of the bottom of the impregnation holding barrel 20.

[0078] Therefore, in the embodiment of providing the heat insulation protrusions 120, the specific structure of the heat insulation protrusions 120 is adapted to the shape of the bottom of the impregnation holding barrel 20, so that the heat insulation protrusions 120 also form an insulation layer between the impregnation holding barrel 20 and the heat insulation bottom plate 12 under the premise of reducing the heat conduction area of the impregnation holding barrel 20 to the outside, thereby further reducing the risk of heat loss through the bottom wall surface of the impregnation holding barrel 20 to the heat insulation bottom plate 12.

[0079] Further, in an embodiment, as shown in Figure 2 and Figure 3As shown, to prevent the superconducting coil 4 from shifting position after being placed in the impregnation tank 20, the opening of the impregnation tank 20 faces the heat-insulating top cover 11, and a central support member 200 for supporting the superconducting coil 4 is provided inside. The central support member 200 extends along the height direction H and protrudes from the center of the impregnation tank 20, with its lower end fixedly connected to the bottom wall of the impregnation tank 20 and its upper end extending along the height direction H. When the superconducting coil 4 is housed in the impregnation tank 20, the superconducting coil 4 is sleeved on the outer periphery of the central support member 200, so that the central support member 200 can provide mechanical support for the superconducting coil 4, ensuring the radial stability of the superconducting coil 4 during the high-temperature impregnation process and avoiding the risk of the superconducting coil 4 shaking during the epoxy resin entry process.

[0080] In addition, by setting the central support 200, the space inside the impregnation tank 20 can be occupied by the central support 200, thereby reducing the amount of epoxy resin used, reducing unnecessary waste of epoxy resin, and reducing impregnation costs.

[0081] It should be noted that the structure and arrangement of the central support 200 are not limited; for example, it can be a cylindrical fixing base, a cuboid fixing platform, etc.

[0082] Furthermore, in one implementation, such as Figure 2 and Figure 3 As shown, to improve the impregnation efficiency of this stellarator superconducting coil impregnation device, the housing assembly 1 further includes an annular fixing rod 110, which is fixedly installed on the inner circumferential wall of the heat insulation cylinder 10 and located above the impregnation retention tank 20. Furthermore, the impregnation assembly 2 also includes a high-temperature impregnation film 23; wherein the high-temperature impregnation film 23 covers the inner wall of the impregnation retention tank 20 and the outer wall of the central support member 200, thereby protecting the impregnation retention tank 20 and the central support member 200 from epoxy resin contamination; and after impregnating one superconducting coil 4, the high-temperature impregnation film 23 can be replaced without cleaning the impregnation retention tank 20 and the central support member 200, thus having the advantage of high impregnation efficiency.

[0083] Furthermore, due to the flexible nature of the high-temperature impregnated film 23, on the one hand, it can fit the surface of the superconducting coil 4 to the maximum extent to form an open barrel-shaped impregnation area; on the other hand, it makes the high-temperature impregnated film 23 fit the workpiece better than a rigid structure, and there are no tolerance requirements for installation, thereby reducing the installation difficulty.

[0084] In addition, the circumferential edge of the high-temperature impregnation film 23 is fixedly wound on the annular fixing rod 110, which can reduce the risk of displacement of the high-temperature impregnation film 23 due to high-temperature expansion or air flow disturbance, and prevent the high-temperature impregnation film 23 from falling off to the bottom of the impregnation holding barrel 20 during the impregnation process, so as to prevent the epoxy resin from flowing out of the impregnation holding barrel 20, causing the inner cavity of the shell assembly 1 to be contaminated and the epoxy resin to be wasted, and causing the impregnation to fail, thereby causing the superconducting coil 4 to lose superconductivity.

[0085] Further, in an embodiment, as shown in Figure 3 To adapt the center support 200 to superconducting coils 4 of different sizes, a first gap is formed between the high-temperature impregnation film 23 and the inner wall surface of the impregnation holding barrel 20, and a second gap is formed between the high-temperature impregnation film 23 and the outer wall surface of the center support 200; and the first gap and the second gap are both filled with anti-boiling beads 24; so that when the impregnation of one superconducting coil 4 is completed, and the size of the superconducting coil 4 to be impregnated changes in the radial direction of the impregnation holding barrel 20, the next high-temperature impregnation film 23 can be replaced by replacing anti-boiling beads 24 of different diameters, thereby changing the size of the first gap and the second gap in the radial direction of the impregnation holding barrel 20, and further changing the size of the impregnation area in the radial direction of the impregnation holding barrel 20, so that the superconducting coil 4 of changed size can be reliably supported by the center support 200. It should be understood that anti-boiling beads are a device or material used to prevent boiling when liquid is heated, which can prevent liquid from boiling violently by refining bubbles and blocking bubble aggregation; and the anti-boiling beads have a low heat absorption rate in a high-temperature environment.

[0086] Further, in an embodiment, to monitor the temperature of the impregnation holding barrel 20 in real time, the impregnation assembly 2 further comprises at least one temperature sensor 25 fixedly installed on the inner wall surface of the impregnation holding barrel 20, wherein the temperature sensor 25 is located in the first gap; and the heating member 21 is a heating belt fixedly wound on the outer wall surface of the impregnation holding barrel 20. It should be understood that the number of temperature sensors 25 can be set to 1, 2, 3, etc., which is not limited in the present embodiment.

[0087] Specifically, by setting the temperature sensor 25, the external data controller can detect the temperature data of the impregnation holding barrel 20 in real time, so as to adjust the real-time heating temperature of the heating belt, realize whole-process monitoring and control, and ensure the heating temperature of the epoxy resin. It should be understood that the heating member 21 is not limited to a heating belt, but can also be a heating strip, a plurality of heating blocks spaced apart along the circumference of the impregnation holding barrel 20, etc., which is not limited in the present embodiment.

[0088] More specifically, the temperature sensor 25 is arranged in the first gap, and the high-temperature immersion film 23 and the anti-boiling beads 24 can protect the temperature sensor 25, thereby avoiding the problem that the temperature sensor 25 is polluted by the epoxy resin and damaged.

[0089] The structure of the shell assembly 1 is further explained below.

[0090] Optionally, in an embodiment, as shown in Figure 1 and Figure 2 At least one pair of fixing ears 103 is fixedly arranged on the outer wall surface of the heat insulation cylinder 10, and each pair of fixing ears 103 is symmetrically arranged on both sides of the heat insulation cylinder 10, so that the finished immersion device can be hoisted and loaded onto a vehicle during transportation.

[0091] In addition, the design of the fixing ears 103 symmetrically distributed on both sides of the heat insulation cylinder 10 can uniformly transmit the pulling force to the shell assembly 1 when the immersion device is hoisted, thereby preventing the risk of deformation of the heat insulation cylinder 10 caused by unilateral force. On the other hand, the fixing ears 103 can be used to hoist the heat insulation cylinder 10 during installation, and then the heat insulation cylinder 10 is moved to align the mounting hole positions on the heat insulation cylinder 10 with the mounting hole positions on the heat insulation bottom plate 12.

[0092] Further, to improve the heat insulation of the heat insulation cylinder 10, in an embodiment, the heat insulation cylinder 10 is arranged as a Dewar straight cylinder 100, thereby further improving the heat insulation effect of the heat insulation cylinder 10. When the inner cavity of the shell assembly 1 leaks, even if heat is transferred to the heat insulation cylinder 10, the worker will not be scalded.

[0093] In addition, at least one air outlet 101 is formed in the side wall of the Dewar straight cylinder 100, and a vacuum adapter 102 is fixedly installed on each air outlet 101, thereby facilitating vacuumizing the inner cavity of the shell assembly 1. In addition, the vacuum adapter 102 can also lead out the electrical signal lines of the heating belt and the temperature sensor 25 to connect with an external data controller. It should be understood that the number of air outlets 101 can be 1, 2, 3, etc., which is not limited in the present embodiment.

[0094] Further, in an embodiment, the heat insulation top cover 11 is arranged as a butterfly head 111 covering the top of the Dewar straight cylinder 100. The butterfly head 111 has a spherical shape, and the curved surface structure of the spherical shape not only ensures the sealing performance of the shell assembly 1, but also enhances the pressure resistance of the shell assembly 1. It should be understood that when the heat insulation top cover 11 is arranged as the butterfly head 111, an annular mounting flange is arranged at one end of the butterfly head 111 close to the top of the Dewar straight cylinder 100 to realize the fixed connection with the top of the Dewar straight cylinder 100.

[0095] Specifically, the butterfly head 111 is provided with a visual window 112; and the inner wall surface of the heat insulation cylinder 10 is further fixedly installed with an illuminating member 113, which is located above the annular fixing rod 110 in the height direction H. By arranging the visual window 112, the liquid level of the epoxy resin in the immersion retention barrel 20 can be observed through the visual window 112, so as to ensure that the epoxy resin can completely immerse the superconducting coil 4; by arranging the illuminating member 113, the illuminating member 113 is fixed to the inner wall of the heat insulation cylinder 10 and located above the annular fixing rod 110, the position design avoids the interference with the immersion retention barrel 20 and the high-temperature immersion film 23, and the light rays can be projected from top to bottom to cover the entire immersion area, so as to ensure that the immersion process and the resin flow state of the superconducting coil 4 can be clearly observed in the vacuum environment; the visualization monitoring of the immersion process is realized, and direct basis is provided for accurately controlling the heating temperature, the epoxy resin injection amount and the curing state.

[0096] More specifically, the structure and arrangement mode of the illuminating member 113 are not limited.

[0097] In an implementable embodiment, the illuminating member 113 is arranged as an LED (Light Emitting Diode) white illuminating lamp, and the LED white illuminating lamp is fixedly installed on the inner wall surface of the heat insulation cylinder 10, so as to realize the illumination of the inner cavity of the shell assembly 1.

[0098] Specifically, the LED white illuminating lamp can be arranged in a ring shape and fixedly attached to the inner wall surface of the heat insulation cylinder 10, so that the light scattering is more uniform and the illuminating effect is better. It should be understood that the fixed attachment mode can be adhesion, clamping or the like, which is not limited in the present embodiment.

[0099] It should be noted that the LED lamp is a chip of an electrically luminescent semiconductor material, which is fixed to a support by silver glue or white glue, and then the chip and a circuit board are connected by silver wire or gold wire, the periphery is sealed by epoxy resin to protect the internal wire, and finally the shell is installed.

[0100] The structure and arrangement mode of the glue feeding member 22 are further explained and described below.

[0101] In an embodiment, as shown in Figure 2 and Figure 4 , the glue feeding member 22 includes a glue conveying pipe 220 and a glue feeding pipe 221; wherein the glue conveying pipe 220 is fixedly installed on the butterfly head 111, one end of the glue conveying pipe 220 is in communication with the glue conveying part outside the shell assembly 1, the other end penetrates through the butterfly head 111 and extends into the Dewar straight cylinder 100 above the immersion retention barrel 20, one end of the glue feeding pipe 221 is fixed to the other end of the glue conveying pipe 220, and the other end extends to the bottom of the immersion retention barrel 20 along the height direction H.

[0102] Specifically, the glue inlet pipe 221 extends from the end of the glue conveying pipe 220 to the bottom of the impregnation holding barrel 20 along the height direction H, and the epoxy resin is filled from bottom to top when impregnating the superconducting coil 4. This progressive glue filling design effectively prevents the residual of bubbles and ensures the uniform distribution of the epoxy resin in the impregnation holding barrel 20, so as to achieve the purpose of completely filling every gap of the superconducting coil 4.

[0103] More specifically, one end of the glue inlet pipe 221 is fixed to the other end of the glue conveying pipe 220, and the other end extends to the bottom of the impregnation holding barrel 20 along the height direction H. Since the glue inlet pipe 221 is bonded with the cured epoxy resin after impregnation, the glue inlet pipe 221 can be replaced after each impregnation by using this structure.

[0104] Optionally, in an embodiment, as shown in Figure 5 , the cross-sectional shape of the other end of the glue inlet pipe 221 in the height direction H is trapezoidal, so as to increase the opening area of the output end of the glue inlet pipe 221, thereby accelerating the speed of the epoxy resin entering the impregnation holding barrel 20.

[0105] Optionally, in another embodiment, the end face of the other end of the glue inlet pipe 221 can also be provided in a beveled shape, which also has the advantage of increasing the opening area of the output end of the glue inlet pipe 221, thereby accelerating the speed of the epoxy resin entering the impregnation holding barrel 20.

[0106] It should be noted that the other end of the glue inlet pipe 221 is the output end of the glue inlet pipe 221.

[0107] Further, in an embodiment, as shown in Figure 1 and Figure 2 , in order to facilitate the movement and transportation of the impregnation device, the impregnation device further comprises a moving assembly 3 for carrying the shell assembly 1. The moving assembly 3 comprises a carrying plate 30 and a plurality of moving wheels 31. In the height direction H, the shell assembly 1 is located above the moving assembly 3 and is fixed to the carrying plate 30 of the moving assembly 3, and a plurality of moving wheels 31 are arranged below the carrying plate 30. It should be understood that the number of moving wheels 31 can be set to 2, 3, 4, etc., which is not limited in the present embodiment.

[0108] Specifically, when the impregnation device needs to be moved in the laboratory or workshop, the moving wheels 31 can be moved by pushing or pulling the carrying plate 30, so as to achieve the purpose of changing the position of the impregnation device. Compared with the carrying mode, the position of the impregnation device is changed by the movement of the moving wheels 31, which is time-saving, labor-saving, and more safe and reliable.

[0109] More specifically, the mobile wheel 31 can adopt a universal wheel structure, so as to realize multi-angle flexible steering, and thus facilitate steering when obstacles are encountered during movement of the impregnation device by the mobile assembly 3.

[0110] The above describes the embodiments of the present application by specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art according to the disclosure. Although the description of the present application is introduced in combination with the preferred embodiments, this does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications which can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the above description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0111] It should be noted that in the present specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0112] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0113] The terms "first", "second", and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0114] In the description of the present embodiment, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.

Claims

1. An impregnation device for a stellarator superconducting coil, characterized in that, It includes a housing assembly with an internal cavity, and an impregnation assembly disposed within the cavity; wherein, The housing assembly includes a heat-insulating cylinder, a heat-insulating base plate and a heat-insulating top cover fixedly installed at both ends of the heat-insulating cylinder in the height direction; The impregnation assembly includes an impregnation reservoir fixed within the cavity and housing the superconducting coil, a heating component surrounding the outer periphery of the impregnation reservoir, and a glue inlet component; wherein one end of the glue inlet component extends outside the housing assembly, and the other end penetrates the housing assembly and extends into the impregnation reservoir; and... The outer wall of the impregnation and retention barrel and the inner wall of the heat insulation cylinder are arranged radially spaced apart from each other.

2. The impregnation device for the stellarator superconducting coil as described in claim 1, characterized in that, The opening of the impregnation and retention tank faces the heat-insulating top cover, and a central support member supporting the superconducting coil is provided inside; wherein... The central support member extends along the height direction, protruding from the center of the impregnation tank, with its lower end fixedly connected to the bottom wall of the impregnation tank, and its upper end extending along the height direction; and... When the superconducting coil is housed in the immersion container, the superconducting coil is sleeved around the outer periphery of the central support.

3. The impregnation device for the stellarator superconducting coil as described in claim 2, characterized in that, The housing assembly further includes an annular fixing rod, which is fixedly installed on the inner circumferential wall of the heat insulation cylinder and located above the impregnation retention tank; and... The impregnation assembly further includes a high-temperature impregnation film; wherein the high-temperature impregnation film covers the inner wall surface of the impregnation retention tank and the outer wall surface of the central support member, and the peripheral edge of the high-temperature impregnation film is fixedly wrapped around the annular fixing rod.

4. The impregnation device for the stellarator superconducting coil as described in claim 3, characterized in that, A first gap is formed between the high-temperature impregnating film and the inner wall of the impregnation tank, and a second gap is formed between the high-temperature impregnating film and the outer wall of the central support member; and, Both the first gap and the second gap are filled with anti-boiling beads.

5. The impregnation device for the stellarator superconducting coil as described in claim 4, characterized in that, The impregnation assembly further includes at least one temperature sensor fixedly installed on the inner wall of the impregnation retention tank, wherein the temperature sensor is located within the first gap; and, The heating element is configured as a heating belt that is fixedly wound around the outer wall of the impregnation and retention barrel.

6. The impregnation apparatus for the stellarator superconducting coil as described in claim 5, characterized in that, The inner surface of the heat-insulating base plate has heat-insulating protrusions protruding toward the cavity, and the impregnation and retention bucket is fixed on the heat-insulating protrusions; in The heat insulation protrusion is a heat insulation block fixed to the heat insulation base plate, and the heat insulation block is adapted to the bottom shape of the immersion retention tank; or, the heat insulation protrusion is a protrusion extending upward from the inner surface of the heat insulation base plate, and the protrusion is adapted to the bottom shape of the immersion retention tank.

7. The impregnation apparatus for the stellarator superconducting coil as described in claim 6, characterized in that, The heat-insulating cylinder is a Dewar straight cylinder, and at least one air extraction port is provided on the side wall of the Dewar straight cylinder, and a vacuum adapter is fixedly installed on each air extraction port.

8. The impregnation apparatus for the stellarator superconducting coil as described in claim 7, characterized in that, The insulated top cover is a butterfly-shaped end cap that covers the top of the Dewar cylindrical tank. The butterfly-shaped end cap has a truncated spherical shape and a viewing window on it; and... A lighting component is also fixedly installed on the inner wall of the heat insulation cylinder, and the lighting component is located above the annular fixing rod in the height direction.

9. The impregnation apparatus for the stellarator superconducting coil as described in claim 8, characterized in that, The glue inlet component includes a glue delivery pipe and a glue inlet pipe; wherein... The glue delivery tube is fixedly installed on the butterfly end cap, and one end of the glue delivery tube is connected to the glue delivery part outside the shell assembly, and the other end extends through the butterfly end cap into the Dewar straight cylinder tank and is located above the impregnation retention tank. One end of the glue inlet pipe is fixed to the other end of the glue delivery tube, and the other end extends along the height direction to the bottom of the impregnation retention tank.

10. The impregnation apparatus for a stellarator superconducting coil as described in any one of claims 1-9, characterized in that, The impregnation apparatus further includes a movable component that carries the housing assembly; wherein, The housing assembly is fixed to the support plate of the movable assembly, and a plurality of casters are provided below the support plate; and, At least one pair of fixing ears are also fixedly provided on the outer wall surface of the heat insulation cylinder, and each pair of fixing ears is symmetrically arranged on both sides of the heat insulation cylinder.

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