Tokamak host TF magnet assembling device and method

Abstract

The invention relates to the technical field of Tokamak nuclear fusion, and discloses a Tokamak host TF magnet assembly device and method, and the device comprises a fixed plate; the first positioning plate and the second positioning plate are detachably arranged on the fixing plate and are arranged at intervals in the first direction, the first positioning plate is provided with a first positioning hole, and the second positioning plate is provided with a second positioning hole; the shaft assemblies are jointly installed in each first positioning hole and the corresponding second positioning hole, and the shaft assemblies are arranged in the corresponding first positioning holes and the corresponding second positioning holes in a penetrating mode in the first direction; the shaft assembly comprises an adjusting nut, a conical shaft and a plurality of fan-shaped shafts, the fan-shaped shafts jointly define a conical shaft space, the conical shaft is arranged in the shaft space and provided with a screw located outside the shaft space, and the adjusting nut is in threaded connection with the screw. According to the invention, the high position precision during TF magnet assembly installation and the connection reliability of the TF magnet assembly can be ensured, the assembly difficulty can be reduced, and the work efficiency and the operation safety of assembly installation can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tokamak nuclear fusion, and particularly relates to a device and method for assembling pairs of TF magnets of a tokamak main machine. BACKGROUND

[0002] A tokamak is a device for controlled nuclear fusion, which mainly controls high-temperature plasma by magnetic confinement, so that the plasma generates a fusion reaction in a vacuum chamber to release huge energy, which is finally used by humans through energy conversion. In the middle of the tokamak, there is a large annular pressure vessel, which is mainly a vacuum chamber. A cold shield is arranged outside the vacuum chamber, and then a superconducting magnet, also known as a TF (toroidal field coil) magnet, is arranged outside the cold shield. The TF magnet is the most important confinement component in the operation state of the plasma. During the installation of the whole main machine, not only the installation accuracy of the TF magnet needs to be ensured, but also the TF magnets need to be assembled and constrained to avoid damaging the overall structural stability of the TF magnet under the action of strong electromagnetic force, so as to effectively constrain the operation of the plasma beam during operation, ensure the firm connection between the TF magnets, and avoid the loss of constraint of the TF magnet due to the large electromagnetic force during operation, which may cause a loss of superconductivity and other damages. However, the TF magnet is independently manufactured, the manufacturing process is complex, and the weight is heavy, so the two-by-two assembly of the TF magnets needs to be considered multiple times.

[0003] The existing tokamak fusion energy experimental device has 16 TF magnets, which need to be assembled and fixed in pairs to provide a magnetic field for the operation of the plasma. However, a single TF magnet is heavy, and the assembly and constraint of the pair require high accuracy, so how to ensure the accurate positioning and fixation between the TF magnets has become one of the problems to be solved. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a device for assembling pairs of TF magnets of a tokamak main machine, which can ensure the high positional accuracy requirement of the assembly of the TF magnets.

[0005] According to an embodiment of the present invention, a tokamak main unit TF magnet assembly device includes: a fixed plate; a first positioning plate and a second positioning plate, the first positioning plate and the second positioning plate being detachably disposed on the fixed plate and spaced apart along a first direction, the first positioning plate having a plurality of first positioning holes, the second positioning plate having a plurality of second positioning holes, the number of second positioning holes and the number of first positioning holes being equal and corresponding one-to-one; a shaft assembly, the shaft assembly being installed in each of the first positioning holes and the corresponding second positioning holes, the shaft assembly being inserted through the corresponding first positioning holes and the corresponding second positioning holes along the first direction; wherein, the shaft assembly includes an adjusting nut, a tapered shaft and a plurality of sector shafts, the plurality of sector shafts being spaced apart along the circumferential direction and jointly defining a tapered shaft space, the tapered shaft being disposed within the shaft space and having a screw located outside the shaft space, the adjusting nut being screwed to the screw and configured to be screwed to drive the tapered shaft to move along the first direction, so that the plurality of sector shafts move away from or closer to each other.

[0006] The tokamak main unit TF magnet assembly device according to an embodiment of the present invention, by configuring the device to include a fixed plate, a first positioning plate, a second positioning plate and a shaft assembly, and the shaft assembly including an adjusting nut, a tapered shaft and a plurality of sector shafts, can ensure high positional accuracy when assembling two adjacent TF magnets and ensure the connection reliability of the TF magnet assembly. Moreover, the use of a shaft assembly can reduce the assembly difficulty and improve the work efficiency and operational safety of assembly.

[0007] In some embodiments of the present invention, the assembly device for the TF magnet of the tokamak host includes a first limiting plate. Each first positioning hole is provided with a first limiting plate on the side away from the second positioning plate. The first limiting plate is provided with a first hole. The screw passes through the first hole. The adjusting nut is provided on the side of the first limiting plate away from the first positioning plate.

[0008] In some embodiments of the present invention, the assembly device of the tokamak host TF magnet includes a second limiting plate. Each second positioning hole is provided with a second limiting plate on the side away from the first positioning plate. The second limiting plate is provided with a second hole. The tapered shaft is provided with a guide rod at the end away from the screw. The guide rod is guided and fitted in the second hole.

[0009] In some embodiments of the present invention, the sector-shaped shaft is located outside the shaft space in a stepped shape, the diameters of the first positioning hole and the second positioning hole are not equal, and the first positioning hole and the second positioning hole cooperate with the annular structure formed by the plurality of sector-shaped shafts.

[0010] In some embodiments of the present application, the fan-shaped shafts comprise first, second and third shaft segments connected in sequence and decreasing in diameter in sequence, the first shaft segment is arranged in the first positioning hole, and the third shaft segment is arranged in the second positioning hole.

[0011] In some embodiments of the present application, the fan-shaped shafts are provided with limiting grooves away from the outer side of the shaft space, and the shaft assembly further comprises an elastic constraint ring, which is sleeved on the annular structure formed by the fan-shaped shafts in common and is fitted in the limiting grooves.

[0012] In some embodiments of the present application, the shaft assembly further comprises a sleeve provided with a notch extending along the axis of the sleeve and penetrating through the sleeve, the sleeve is sleeved on the annular structure, and the elastic constraint ring is located in the sleeve.

[0013] In some embodiments of the present application, the device for assembling the pairs of TF magnets of the tokamak main machine comprises adjusting shims, and one side of each of the first positioning plate and the second positioning plate towards each other is provided with the adjusting shims.

[0014] In some embodiments of the present application, the adjusting shims are provided with through holes, the first positioning plate and the second positioning plate are provided with bolt holes, the through holes are provided with first bolts, and the first bolts are fitted on the corresponding bolt holes.

[0015] In some embodiments of the present application, the fixing plate is provided with adjusting holes corresponding to the positions of the first positioning plate and / or the second positioning plate, the adjusting holes are long strip holes extending in the first direction, the adjusting holes are provided with second bolts, and the second bolts are screwed to the corresponding first positioning plate or second positioning plate.

[0016] According to the method for assembling the Tokamak main machine TF magnet provided by the embodiment of the application, the first magnet and the second magnet are assembled by using the Tokamak main machine TF magnet assembling device, the first magnet and the second magnet have mounting holes; the method comprises the following steps: the fixed plate is fixed on the wing of the first magnet by bolts; the first positioning plate and the second positioning plate are connected on the fixed plate by bolts, and the first positioning plate and the second positioning plate are in an adjustable loose state; the wing of the first magnet, the first positioning plate and the second positioning plate are assembled by the shaft assembly, the assembling steps of the shaft assembly comprise the following steps: a plurality of fan-shaped shafts are inserted through the first positioning hole, the mounting hole and the second positioning hole of the first magnet, then the tapered shaft is installed into the shaft space, the adjusting nut is installed on the screw rod, the plurality of fan-shaped shafts are separated from each other by rotating the adjusting nut, so that the first positioning hole, the mounting hole and the second positioning hole are adjusted to be coaxially arranged; the first magnet and the second magnet are moved close to each other, the wing of the second magnet is moved to the assembling position between the first positioning plate and the second positioning plate; the wing of the second magnet, the first positioning plate and the second positioning plate are assembled by another shaft assembly; the bolts connecting the first positioning plate and the second positioning plate with the fixed plate are tightened.

[0017] According to the method for assembling the Tokamak main machine TF magnet provided by the embodiment of the application, the first magnet and the second magnet are assembled by using the Tokamak main machine TF magnet assembling device, the first magnet and the second magnet have mounting holes; the method comprises the following steps: the fixed plate is fixed on the wing of the first magnet by bolts; the first positioning plate and the second positioning plate are connected on the fixed plate by bolts, and the first positioning plate and the second positioning plate are in an adjustable loose state; the wing of the first magnet, the first positioning plate and the second positioning plate are assembled by the shaft assembly, the assembling steps of the shaft assembly comprise the following steps: a plurality of fan-shaped shafts are inserted through the first positioning hole, the mounting hole and the second positioning hole of the first magnet, then the tapered shaft is installed into the shaft space, the adjusting nut is installed on the screw rod, the plurality of fan-shaped shafts are separated from each other by rotating the adjusting nut, so that the first positioning hole, the mounting hole and the second positioning hole are adjusted to be coaxially arranged; the first magnet and the second magnet are moved close to each other, the wing of the second magnet is moved to the assembling position between the first positioning plate and the second positioning plate; the wing of the second magnet, the first positioning plate and the second positioning plate are assembled by another shaft assembly; the bolts connecting the first positioning plate and the second positioning plate with the fixed plate are tightened.

[0018] Additional aspects and advantages of the application will be made apparent by the following description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the application will become apparent and be more readily understood through consideration of the following description, taken in conjunction with the accompanying drawings, in which: Figure 1 is an assembly perspective view of the Tokamak main machine TF magnet assembling device and the first magnet and the second magnet provided by some embodiments of the application; Figure 2 is an exploded view of the Tokamak main machine TF magnet assembling device provided by some embodiments of the application; Figure 3 is an exploded view of the shaft assembly provided by some embodiments of the application; Figure 4is a cross-sectional view of the internal structure of the Tokamak main machine TF magnet after the wing of the first magnet is assembled by the Tokamak main machine TF magnet assembling device provided by some embodiments of the present application; Figure 5 is a top view of the Tokamak main machine TF magnet after the first magnet is assembled by the Tokamak main machine TF magnet assembling device provided by some embodiments of the present application; Figure 6 is a front view of the Tokamak main machine TF magnet after the first magnet and the second magnet are assembled by the Tokamak main machine TF magnet assembling device provided by some embodiments of the present application; Figure 7 is a flow chart of the Tokamak main machine TF magnet assembling method provided by some embodiments of the present application.

[0020] Reference signs: 100, Tokamak main machine TF magnet assembling device; 10, fixed plate; 101, adjusting hole; 20, first positioning plate; 201, first positioning hole; 30, second positioning plate; 301, second positioning hole; 40, shaft assembly; 401, adjusting nut; 402, conical shaft; 4021, screw rod; 4022, guide rod; 403, fan-shaped shaft; 4031, limiting groove; 4032, first shaft section; 4033, second shaft section; 4034, third shaft section; 404, shaft space; 405, elastic constraint ring; 406, sleeve; 4061, notch; 50, first limiting plate; 501, first hole; 60, second limiting plate; 601, second hole; 70, adjusting gasket; 701, through hole; 80, second bolt; 210, first magnet; 220, second magnet; 2001, mounting hole; 2002, wing. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0022] In the description of this invention, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0023] The following is for reference. Figures 1-6 This describes a pairing device 100 for the TF magnet of a tokamak host according to an embodiment of the present invention.

[0024] like Figure 1 As shown, one embodiment of the present invention provides a pairing device 100 for TF magnets in a tokamak host, used for pairing and connecting two adjacent TF magnets. Figure 1 As shown, two adjacent TF magnets can be referred to as the first magnet 210 and the second magnet 220, respectively. The first magnet 210 and the second magnet 220 can be installed and positioned by the TF magnet pairing device 100 of the tokamak host.

[0025] like Figures 2-4As shown, the assembly device 100 for the TF magnets of the tokamak main unit includes a fixed plate 10, a first positioning plate 20, a second positioning plate 30, and a shaft assembly 40. The first positioning plate 20 and the second positioning plate 30 are detachably mounted on the fixed plate 10 and spaced apart along a first direction. The first positioning plate 20 has a plurality of first positioning holes 201, and the second positioning plate 30 has a plurality of second positioning holes 301. The number of second positioning holes 301 and the number of first positioning holes 201 are equal and correspond one-to-one. A shaft assembly 40 is installed in each first positioning hole 201 and the corresponding second positioning hole 301. The shaft assembly 40 passes through the corresponding first positioning hole 201 and the corresponding second positioning hole 301 along the first direction. Position hole 301; wherein, the shaft assembly 40 includes adjusting nut 401, tapered shaft 402 and multiple sector shafts 403, the multiple sector shafts 403 are spaced apart along the circumferential direction and together define a tapered shaft space 404, the tapered shaft 402 is disposed in the shaft space 404 and is provided with a screw 4021 located outside the shaft space 404, the adjusting nut 401 and the screw 4021 are screwed together and are configured to be rotatable to drive the tapered shaft 402 to move along a first direction so that the multiple sector shafts 403 move away from or closer to each other.

[0026] Reference Figure 1 When assembling the first magnet 210 and the second magnet 220, the tokamak main unit TF magnet assembly device 100 first assembles with one TF magnet. For example, as Figure 5 As shown, the assembly device 100 for the tokamak main unit TF magnet can be assembled with the first magnet 210 first. When assembling the assembly device 100 with the first magnet 210, the fixing plate 10 is bolted to the top of the wing 2002 of the first magnet 210. Then, the first positioning plate 20 and the second positioning plate 30 are arranged along a first direction on both sides of the wing 2002 and bolted to the fixing plate 10. The first direction can be set according to the actual position of the first magnet 210. Figure 1 For example, the first direction can be the front-to-back direction, where the first positioning plate 20 is on the front side of the wing 2002, and the second positioning plate 30 is located on the rear side of the wing 2002. Then, the shaft assembly 40 is passed through the first positioning hole 201, the mounting hole 2001 on the wing 2002, and the second positioning hole 301 to achieve concentricity of the three holes.

[0027] When installing the shaft assembly 40, multiple sector shafts 403 are passed through the first positioning hole 201, the mounting hole 2001, and the second positioning hole 301. The number of sector shafts 403 can be, but is not limited to, two, three, four, etc. After all the sector shafts 403 are installed, the tapered shaft 402 is inserted into the shaft space 404 formed by the multiple sector shafts 403. Finally, the adjusting nut 401 and the screw 4021 on the tapered shaft 402 are screwed together. By turning the adjusting nut 401, the tapered shaft 402 can be moved in the shaft space 404, gradually spreading the multiple sector shafts 403 in the radial direction, thereby making the multiple sector shafts 403 tighten in the first positioning hole 201, the mounting hole 2001, and the second positioning hole 301, thus achieving concentricity of the first positioning hole 201, the mounting hole 2001, and the second positioning hole 301.

[0028] During the assembly of the aforementioned shaft assembly 40 with the first positioning hole 201, mounting hole 2001, and second positioning hole 301, since the multiple sector shafts 403 are initially dispersed, when the positional deviations of the first positioning hole 201, mounting hole 2001, and second positioning hole 301 are significant (i.e., the coaxiality of the three holes is poor), and each sector shaft 403 is relatively small, it can be easily installed into the first positioning hole 201, mounting hole 2001, and second positioning hole 301. Then, under the action of the tapered shaft 402, it is gradually opened to keep the first positioning hole 201, mounting hole 2001, and second positioning hole 301 concentric. Therefore, this structure of the shaft assembly 40 reduces the positional requirements of the first positioning hole 201, mounting hole 2001, and second positioning hole 301, thereby reducing assembly difficulty and improving installation efficiency.

[0029] like Figure 6 As shown, when assembling the first magnet 210 and the second magnet 220, move the first magnet 210 or the second magnet 220 to move the wing 2002 of the second magnet 220 into the space between the first positioning plate 20 and the second positioning plate 30. Then, following the installation steps of the shaft assembly 40 described above, install the other shaft assembly 40 into the mounting hole 2001 on the wing 2002 of the second magnet 220, so that the first positioning hole 201, the mounting hole 2001 and the second positioning hole 301 on the second magnet 220 are kept in a concentric state.

[0030] By engaging the assembly device 100 of the tokamak main unit TF magnet with the mounting holes 2001 on the first magnet 210 and the second magnet 220, the assembly installation of the first magnet 210 and the second magnet 220 can be achieved, ensuring the positioning accuracy and fixing effect of the first magnet 210 and the second magnet 220.

[0031] Secondly, due to the large size of the TF magnet, the corresponding size of the wing 2002 and its mounting hole 2001 is also relatively large, thus requiring a larger shaft assembly 40. During installation, the shaft assembly 40 of this invention can be constructed by first inserting multiple sector shafts 403 into the first positioning hole 201, mounting hole 2001, and second positioning hole 301, and finally inserting the tapered shaft 402. Compared to inserting a single positioning mandrel, dividing the shaft assembly 40 into multiple components reduces the installation difficulty and avoids situations where large deviations in the positions of the first positioning hole 201, mounting hole 2001, and second positioning hole 301 prevent installation. Furthermore, the sector shafts 403 and tapered shafts 402 are relatively small in size and weight, making construction easier, hoisting and operation more convenient, and improving operational safety.

[0032] It should be noted that the number of the first positioning hole 201 and the second positioning hole 301 can be set according to the number of mounting holes 2001 on the wing 2002 of the TF magnet. For example, as Figure 1 As shown, each TF magnet has two mounting holes 2001 on its wing 2002. Correspondingly, the first positioning plate 20 has two sets of first positioning holes 201, with two holes in each set. The second positioning plate 30 has two sets of second positioning holes 301, with two holes in each set. For example, if each TF magnet has two wings 2002, then pairing two adjacent TF magnets requires a pairing device 100 for the TF magnets of the tokamak main unit.

[0033] The tokamak host TF magnet assembly device 100 according to an embodiment of the present invention, by configuring the device to include a fixing plate 10, a first positioning plate 20, a second positioning plate 30 and a shaft assembly 40, and the shaft assembly 40 including an adjusting nut 401, a tapered shaft 402 and a plurality of sector shafts 403, can ensure high positional accuracy when assembling two adjacent TF magnets and ensure the connection reliability of the TF magnet assembly. Moreover, the use of the shaft assembly 40 can reduce the assembly difficulty and improve the work efficiency and operational safety of assembly installation.

[0034] In some embodiments of the present invention, such as Figure 2 and Figure 4 As shown, the assembly device 100 of the TF magnet of the tokamak host includes a first limiting plate 50. Each first positioning hole 201 is provided with a first limiting plate 50 on the side away from the second positioning plate 30. The first limiting plate 50 is provided with a first hole 501. A screw 4021 passes through the first hole 501. An adjusting nut 401 is provided on the side of the first limiting plate 50 away from the first positioning plate 20.

[0035] The first limiting plate 50 can limit the movement of multiple sector shafts 403, preventing them from dislodging from the first positioning plate 20 to the side away from the second positioning plate 30, thus ensuring the reliable installation of the multiple sector shafts 403 on the first positioning plate 20. The first limiting plate 50 also serves as a support, supporting the sector shafts 403 between the first positioning plate 20 and the adjusting nut 401. By tightening the adjusting nut 401 on the side of the first limiting plate 50 away from the tapered shaft 402, the tapered shaft 402 can move under the limitation of the first limiting plate 50. This allows the tapered shaft 402 to move without the inner side of the adjusting nut 401 needing to abut against the sector shaft 403, thus avoiding wear on the sector shaft 403 and improving its reliability.

[0036] Optionally, the shape of the first limiting plate 50 can be, but is not limited to, a circle, a rectangle, etc.

[0037] In some embodiments of the present invention, such as Figure 2 and Figure 4 As shown, the assembly device 100 of the TF magnet of the tokamak host includes a second limiting plate 60. Each second positioning hole 301 is provided with a second limiting plate 60 on the side away from the first positioning plate 20. The second limiting plate 60 is provided with a second hole 601. The end of the tapered shaft 402 away from the screw 4021 is provided with a guide rod 4022. The guide rod 4022 is guided and fitted in the second hole 601.

[0038] Referring to the previous example, the second limiting plate 60 can limit the other end of the multiple sector shafts 403, preventing the sector shafts 403 from dislodging from the second positioning plate 30 to the side away from the first positioning plate 20, thus ensuring the reliable installation of the multiple sector shafts 403 on the second positioning plate 30. The second limiting plate 60 can also guide the movement of the tapered shaft 402. When the tapered shaft 402 moves within the shaft space 404, the guide rod 4022 slides with the second hole 601, thereby improving the reliability of the movement of the tapered shaft 402. Through the coordinated action of the second limiting plate 60 and the first limiting plate 50, the shaft assembly 40 can be stably and reliably installed on the first positioning plate 20 and the second positioning plate 30.

[0039] In some embodiments of the present invention, such as Figure 2 and Figure 4 As shown, the sector-shaped shaft 403 is located on the outside of the shaft space 404 in a stepped shape. The diameters of the first positioning hole 201 and the second positioning hole 301 are not equal, and the first positioning hole 201 and the second positioning hole 301 cooperate with the annular structure formed by the multiple sector-shaped shafts 403.

[0040] If the diameters of the first positioning hole 201, the second positioning hole 301, and the mounting hole 2001 are kept equal, in order to ensure that the first positioning hole 201, the second positioning hole 301, and the mounting hole 2001 remain concentric after the shaft assembly 40 is inserted, the requirements for machining the first positioning hole 201 and the second positioning hole 301 are high, and the diameter error of the three holes needs to be minimized as much as possible, which will increase the machining difficulty. Moreover, the diameter dimensions of the first positioning hole 201, the second positioning hole 301, and the mounting hole 2001 are all relatively large, and even after machining, the error cannot be effectively identified by the naked eye, which is not conducive to inspection and subsequent management.

[0041] In the above technical solution, by setting the sector-shaped shaft 403 as a stepped shaft structure, the diameters of the first positioning hole 201, the second positioning hole 301, and the mounting hole 2001 are all different. This reduces the machining accuracy requirements for the first positioning hole 201 and the second positioning hole 301, and avoids the risk that the first positioning hole 201, the second positioning hole 301, and the mounting hole 2001 may not remain coaxial after the shaft assembly 40 is inserted due to machining errors when the first positioning hole 201, the second positioning hole 301, and the mounting hole 2001 have the same diameter. This facilitates subsequent management. In other words, adopting the above solution can further reduce the installation difficulty of multiple sector-shaped shafts 403 on the first positioning plate 20, the second positioning plate 30, and the wing 2002, which is beneficial to improving installation efficiency.

[0042] In some embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the sector-shaped shaft 403 includes a first shaft segment 4032, a second shaft segment 4033 and a third shaft segment 4034 connected in sequence with decreasing diameters. The first shaft segment 4032 is disposed in the first positioning hole 201 and the third shaft segment 4034 is disposed in the second positioning hole 301.

[0043] It is understood that the sector-shaped shaft 403 has a three-segment stepped shaft structure. The first segment 4032 has the largest diameter and fits into the first positioning hole 201. The second segment 4033 has the second largest diameter and fits into the mounting hole 2001 of the TF magnet. The third segment 4034 has the smallest diameter and fits into the second positioning hole 301. The first segment 4032 and the first positioning hole 201, as well as the third segment 4034 and the second positioning hole 301, are all clearance fits, with the clearance controlled to be less than or equal to 0.15 mm, to ensure that the first segment 4032 and the third segment 4034 can be inserted. The second segment 4033 has an interference fit with the mounting hole 2001. During installation, the entire shaft assembly 40 can be installed using cooling methods such as, but not limited to, liquid nitrogen, to ensure that the shaft assembly 40 can be properly assembled into the first positioning hole 201, the mounting hole 2001, and the second positioning hole 301.

[0044] In the above technical solution, while ensuring that the installation requirements of TF magnets are met, the stepped shaft structure of the sector shaft 403 can be effectively simplified, thereby reducing costs and improving installation efficiency.

[0045] In some embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the sector shaft 403 is provided with a limiting groove 4031 on the outer side away from the shaft space 404. The shaft assembly 40 also includes an elastic constraint ring 405, which is sleeved on the annular structure formed by multiple sector shafts 403 and fits in the limiting groove 4031.

[0046] The elastic constraint ring 405 can be, but is not limited to, a spring, an elastic rope, etc. Since the multiple sector shafts 403 are installed separately in the first positioning hole 201, the mounting hole 2001, and the second positioning hole 301, the elastic constraint ring 405 and the limiting groove 4031 provide limiting action for the multiple sector shafts 403 in the first direction. This helps ensure that the axial ends of the multiple sector shafts 403 remain aligned and prevents them from becoming scattered, thus providing a reliable shaft space 404 for the tapered shaft 402. The elastic constraint ring 405 can also be pre-fitted into the limiting groove 4031 of the multiple sector shafts 403, allowing the multiple sector shafts 403 to be installed together in the first positioning hole 201, the mounting hole 2001, and the second positioning hole 301. This reduces installation difficulty and improves installation efficiency.

[0047] In some embodiments of the present invention, such as Figures 2-4 As shown, the shaft assembly 40 also includes a sleeve 406, which has a notch 4061. The notch 4061 extends along the axial direction of the sleeve 406 and penetrates the sleeve 406. The sleeve 406 is fitted onto the annular structure, and the elastic constraint ring 405 is located inside the sleeve 406.

[0048] The sleeve 406 can refer to a tubular fitting that can expand laterally. Before installing multiple sector shafts 403 into the first positioning hole 201, the mounting hole 2001, and the second positioning hole 301, the sleeve 406 can be installed into the mounting hole 2001 first, and then the multiple sector shafts 403 can be inserted into the sleeve 406. It can be understood that the sleeve 406 provides protection, preventing the multiple sector shafts 403 from contacting the hole wall of the mounting hole 2001, preventing damage to the hole wall of the mounting hole 2001 when the multiple sector shafts 403 are tightened, and ensuring that the mounting hole 2001 remains intact and undamaged after the shaft assembly 40 is removed.

[0049] In some embodiments of the present invention, such as Figure 2 and Figure 4As shown, the assembly device 100 of the TF magnet of the tokamak host includes an adjustment shim 70, and the first positioning plate 20 and the second positioning plate 30 are both provided with adjustment shims 70 on the side facing each other.

[0050] When assembling the first magnet 210 and the second magnet 220, the assembly can be performed by rotating the first magnet 210 toward the second magnet 220 or by rotating the second magnet 220 toward the first magnet 210. Based on the above assembly process, by providing adjusting shims 70 on both sides of the first positioning plate 20 and the second positioning plate 30 facing each other, the distance between the first positioning plate 20 and the second positioning plate 30 in the first direction can be increased. For ease of understanding, this can be understood as the space between the first positioning plate 20 and the second positioning plate 30 in the first direction being greater than the thickness of the wing 2002 in the first direction by adjusting the shims 70. This ensures that when the first magnet 210 or the second magnet 220 rotates, the wing 2002 of the second magnet 220 can be properly inserted into the first positioning plate 20 and the second positioning plate 30 without interfering with them, thus preventing collisions between the first positioning plate 20, the second positioning plate 30, and the second magnet 220.

[0051] Optionally, the number of adjusting shims 70 on the side of the first positioning plate 20 and the second positioning plate 30 facing each other can be multiple, such as, but not limited to, one, two, three, etc. The adjusting shims 70 can be, but not limited to, rectangular, circular, or other shapes.

[0052] In some embodiments of the present invention, such as Figure 2 As shown, the adjusting shim 70 has a through hole 701, and the first positioning plate 20 and the second positioning plate 30 have bolt holes (not shown in the figure). A first bolt is provided in the through hole 701, and the first bolt is fitted into the corresponding bolt hole.

[0053] The adjusting shim 70 can be fixed to the first positioning plate 20 and the second positioning plate 30 by bolts to ensure that the adjusting shim 70 can be reliably fixed to the first positioning plate 20 and the second positioning plate 30, and to prevent the adjusting shim 70 from falling off or shifting during the assembly of the tokamak host TF magnet pairing device 100 and the TF magnet.

[0054] It should be noted that, in conjunction with the previous example, after the assembly device 100 of the tokamak host TF magnet is assembled with the first magnet 210, the positions of the first positioning plate 20 and the second positioning plate 30 for assembling the wings 2002 of the second magnet 220 can be without setting the adjustment shims 70 initially. Instead, after the wings 2002 of the second magnet 220 enter the space between the first positioning plate 20 and the second positioning plate 30, they can be inserted on-site and placed between the first positioning plate 20 and the wings 2002, as well as between the second positioning plate 30 and the wings 2002.

[0055] In some embodiments of the present invention, such as Figure 1 As shown, the fixing plate 10 is provided with an adjustment hole 101 corresponding to the position of the first positioning plate 20 and / or the second positioning plate 30. The adjustment hole 101 is an elongated hole extending along the first direction. A second bolt 80 is provided in the adjustment hole 101. The second bolt 80 is screwed to the corresponding first positioning plate 20 or second positioning plate 30.

[0056] In the above technical solution, the fixing plate 10 may be provided with an adjustment hole 101 at the position corresponding to the first positioning plate 20, or the fixing plate 10 may be provided with an adjustment hole 101 at the position corresponding to the second positioning plate 30, or the fixing plate 10 may be provided with an adjustment hole 101 at the positions corresponding to both the first positioning plate 20 and the second positioning plate 30.

[0057] Referring to the previous example, after the assembly device 100 of the tokamak main unit TF magnet is assembled with the first magnet 210, in order to prevent the second magnet 220 and the first magnet 210 from having a large positional deviation, which would prevent the other shaft assembly 40 from being unable to be inserted into the mounting hole 2001 of the second magnet 220 or from being inserted unsmoothly, the second bolt 80 can be loosened to adjust the position of the first positioning plate 20 and / or the second positioning plate 30, so that the shaft assembly 40 can be inserted into the mounting hole 2001 of the second magnet 220, so that the mounting hole 2001 is concentric with the first positioning hole 201 and the second positioning hole 301. After adjustment, the second bolt 80 is tightened again to fix the first positioning plate 20 and / or the second positioning plate 30 back onto the fixing plate 10.

[0058] In the above technical solution, an adjustment hole 101 extending in the first direction is provided by the fixing plate 10, so that the first positioning plate 20 or the second positioning plate 30 can be adjusted in the first direction by the second bolt 80, so as to ensure that the shaft assembly 40 can be smoothly inserted into the mounting hole 2001 of the second magnet 220, so as to better adapt to the on-site installation situation.

[0059] According to an embodiment of the present invention, a method for assembling TF magnets of a tokamak host is provided, wherein a TF magnet assembly device 100 as described in any of the preceding embodiments is used to assemble adjacent first magnets 210 and second magnets 220, wherein the first magnets 210 and second magnets 220 have mounting holes 2001.

[0060] like Figure 7 As shown, the assembly method of the TF magnet of the tokamak host according to an embodiment of the present invention includes: Step S1: Fix the fixing plate 10 to the wing 2002 of the first magnet 210 with bolts. Specifically, it can be understood that the fixing plate 10 is fixed to the top surface of the wing 2002 of the first magnet 210 with bolts. The number of bolts can be multiple, and can be, but is not limited to, two, three, four, etc.

[0061] Step S2: Connect the first positioning plate 20 and the second positioning plate 30 to the fixed plate 10 with bolts, and ensure that the first positioning plate 20 and the second positioning plate 30 are in an adjustable, loose state. That is, the first positioning plate 20 and the second positioning plate 30 are not fixed to the fixed plate 10, but are in an adjustable state. This allows for fine-tuning of the first positioning plate 20 and the second positioning plate 30 to prevent large positional deviations between the wing 2002 and the first positioning plate 20 and the second positioning plate 30, which could prevent the shaft assembly 40 from smoothly passing into the mounting hole 2001.

[0062] Step S3: Assemble the wing 2002, first positioning plate 20, and second positioning plate 30 of the first magnet 210 through the shaft assembly 40. The assembly steps of the shaft assembly 40 include: passing multiple sector-shaped shafts 403 through the first positioning hole 201, mounting hole 2001, and second positioning hole 301 of the corresponding first magnet 210; then installing the tapered shaft 402 into the shaft space 404; then installing the adjusting nut 401 on the screw 4021; and by turning the adjusting nut 401, moving the multiple sector-shaped shafts 403 away from each other so that the first positioning hole 201, mounting hole 2001, and second positioning hole 301 are adjusted to be coaxially arranged.

[0063] Step S4: Bring the first magnet 210 and the second magnet 220 closer together, so that the wings 2002 of the second magnet 220 are moved to the assembly position between the first positioning plate 20 and the second positioning plate 30.

[0064] Step S5: Assemble the wings 2002 of the second magnet 220, the first positioning plate 20, and the second positioning plate 30 via another shaft assembly 40; wherein, the step of assembling the wings 2002 of the second magnet 220 with the other shaft assembly 40 can refer to the installation steps of the first magnet 210, and will not be repeated here.

[0065] Step S6: Tighten the bolts connecting the first positioning plate 20 and the second positioning plate 30 to the fixed plate 10. That is, after the tokamak main unit TF magnet assembly device 100 simultaneously completes the assembly with the first magnet 210 and the second magnet 220, the bolts connecting the first positioning plate 20 and the second positioning plate 30 to the fixed plate 10 are finally tightened, thereby ensuring that the positions of the first magnet 210 and the second magnet 220 are relatively fixed and will not shift.

[0066] According to the tokamak host TF magnet assembly method of the present invention, the above method can ensure high positional accuracy when assembling two adjacent TF magnets and ensure the connection reliability of the TF magnet assembly. Moreover, the use of shaft assembly 40 can reduce assembly difficulty and improve the work efficiency and operational safety of assembly.

[0067] The other components and operations of the tokamak host and TF magnet according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pairing device for TF magnets in a tokamak main unit, characterized in that, include: Fixing plate; A first positioning plate and a second positioning plate are detachably mounted on the fixed plate and spaced apart along a first direction. The first positioning plate is provided with a plurality of first positioning holes, and the second positioning plate is provided with a plurality of second positioning holes. The number of second positioning holes and first positioning holes are equal and correspond one-to-one. A shaft assembly is installed in each of the first positioning holes and the corresponding second positioning holes, and the shaft assembly passes through the corresponding first positioning hole and the second positioning hole along the first direction. The shaft assembly includes an adjusting nut, a tapered shaft, and multiple sector shafts. The multiple sector shafts are spaced apart along the circumferential direction and together define a tapered shaft space. The tapered shaft is located within the shaft space and has a screw located outside the shaft space. The adjusting nut and the screw are screwed together and configured to be able to be turned to drive the tapered shaft to move along the first direction, so that the multiple sector shafts move away from or closer to each other.

2. The assembly device for the TF magnet of the tokamak main unit according to claim 1, characterized in that, The assembly device for the TF magnet of the tokamak host includes a first limiting plate. Each first positioning hole is provided with a first limiting plate on the side away from the second positioning plate. The first limiting plate is provided with a first hole. The screw passes through the first hole. The adjusting nut is provided on the side of the first limiting plate away from the first positioning plate.

3. The assembly and pairing device for the TF magnet of the tokamak main unit according to claim 2, characterized in that, The assembly device for the TF magnet of the tokamak host includes a second limiting plate. Each second positioning hole is provided with a second limiting plate on the side away from the first positioning plate. The second limiting plate is provided with a second hole. The tapered shaft is provided with a guide rod at the end away from the screw. The guide rod is guided and fitted in the second hole.

4. The assembly and pairing device for the TF magnet of the tokamak main unit according to claim 1, characterized in that, The sector-shaped shaft is located on the outside of the shaft space in a stepped shape. The diameters of the first positioning hole and the second positioning hole are not equal, and the first positioning hole and the second positioning hole cooperate with the annular structure formed by the multiple sector-shaped shafts.

5. The assembly and pairing device for the TF magnet of the tokamak main unit according to claim 4, characterized in that, The sector-shaped shaft includes a first shaft segment, a second shaft segment, and a third shaft segment connected in sequence with decreasing diameters. The first shaft segment is disposed in the first positioning hole, and the third shaft segment is disposed in the second positioning hole.

6. The assembly and pairing device for the TF magnet of the tokamak main unit according to claim 1, characterized in that, The sector-shaped shaft is provided with a limiting groove on the outer side away from the shaft space. The shaft assembly also includes an elastic constraint ring, which is sleeved on the annular structure formed by the multiple sector-shaped shafts and fits in the limiting groove.

7. The assembly and pairing device for the TF magnet of the tokamak main unit according to claim 6, characterized in that, The shaft assembly further includes a sleeve with a notch that extends along the axial direction of the sleeve and penetrates the sleeve. The sleeve is fitted onto the annular structure, and the elastic constraint ring is located inside the sleeve.

8. The assembly and pairing device for the TF magnet of the tokamak main unit according to claim 1, characterized in that, The assembly device for the TF magnets of the tokamak main unit includes adjustment shims, and the adjustment shims are provided on the side of the first positioning plate and the second positioning plate facing each other.

9. The assembly and pairing device for the TF magnet of the tokamak main unit according to claim 8, characterized in that, The adjusting shim has a through hole, and the first positioning plate and the second positioning plate have bolt holes. A first bolt is provided in the through hole, and the first bolt is fitted into the corresponding bolt hole.

10. The assembly and pairing device for the TF magnet of the tokamak main unit according to claim 1, characterized in that, The fixing plate is provided with adjustment holes corresponding to the positions of the first positioning plate and / or the second positioning plate. The adjustment holes are elongated holes extending along the first direction. A second bolt is provided in the adjustment holes, and the second bolt is screwed to the corresponding first positioning plate or second positioning plate.

11. A method for assembling TF magnets in a tokamak main unit, characterized in that, The method comprises: assembling adjacent first and second magnets using the assembly device for the TF magnets of the tokamak main unit as described in any one of claims 1 to 10, wherein the first and second magnets have mounting holes; the method includes: The fixing plate is fixed to the wing of the first magnet by bolts; The first positioning plate and the second positioning plate are connected to the fixed plate by bolts, and the first positioning plate and the second positioning plate are in an adjustable loose state. The first magnet's wings, first positioning plate, and second positioning plate are assembled via the shaft assembly. The assembly steps of the shaft assembly include: passing multiple fan-shaped shafts through the first positioning hole, the mounting hole, and the second positioning hole corresponding to the first magnet; then installing the tapered shaft into the shaft space; then installing the adjusting nut on the screw; and turning the adjusting nut to move the multiple fan-shaped shafts away from each other so that the first positioning hole, the mounting hole, and the second positioning hole are adjusted to be coaxially arranged. Bring the first magnet and the second magnet close to each other, so that the wings of the second magnet move to the assembly position between the first positioning plate and the second positioning plate; The wings of the second magnet, the first positioning plate, and the second positioning plate are assembled via another shaft assembly; Tighten the bolts connecting the first positioning plate and the second positioning plate to the fixing plate.

Images