A fastening assembly for a tokamak device

Abstract

The application relates to the technical field of nuclear fusion, and discloses a fastening assembly of a tokamak device, which comprises a first connecting sleeve, a second connecting sleeve, a third connecting sleeve, a connecting bolt, a fixing block and a clamping block, the first connecting sleeve is arranged on the outer side of the second connecting sleeve, the second connecting sleeve is arranged on the outer circumferential side of the connecting bolt, and the connecting bolt is abutted against the second connecting sleeve in the rear direction; the connecting bolt, the clamping block and the fixing block are sequentially arranged from front to back, the third connecting sleeve is arranged on the outer circumferential side of the fixing block and the clamping block, the connecting bolt is screwed on the third connecting sleeve, the fixing block is fixedly connected to the third connecting sleeve and elastically connected to the clamping block, one of the clamping block and the connecting bolt is provided with a first abutting portion, the other is provided with a first abutting groove, and one of the first abutting portion and the first abutting groove is at least partially arranged on the circumference of the connecting bolt, so that the first abutting portion extends into the first abutting groove. In conclusion, the fastening assembly can effectively prevent the connecting bolt from loosening.

Description

Technical Field

[0001] This invention relates to the field of nuclear fusion technology, and in particular to a fastening assembly for a tokamak device. Background Technology

[0002] The tokamak device is one of the key components of nuclear fusion, primarily relying on magnetic confinement to achieve stable confinement of high-temperature plasma, enabling the fusion reaction to occur within a vacuum chamber. The vacuum chamber, as a sealed, pressure-bearing cavity, must maintain an ultra-high vacuum environment, blocking interference from external impurity gases, while also housing the internal functional components. The blanket module, positioned close to the vacuum chamber, serves functions such as energy extraction, neutron shielding, and tritium breeding.

[0003] Currently, the vacuum chamber and cladding of tokamak devices are typically connected in a detachable manner using high-strength bolts and anti-loosening components to meet the needs of assembly, maintenance, and replacement. However, under the extreme conditions of fusion reactors, thermal cycling, strong vibration, and complex alternating loads can lead to fatigue failure of elastic components and drift of the thread friction coefficient. Conventional anti-loosening measures are not reliable enough and it is difficult to maintain a stable preload on the fasteners, making it easy for the fasteners to loosen. Consequently, the connection structure between the vacuum chamber and the cladding is difficult to keep stable. Summary of the Invention

[0004] The purpose of this invention is to provide a fastening component for a tokamak device to solve the technical problem that, during the operation of a tokamak device, the fasteners between the vacuum chamber and the cladding module are difficult to maintain a stable preload, which can easily cause the fasteners to loosen and make it difficult to maintain a stable connection between the vacuum chamber and the cladding.

[0005] To achieve the above objectives, the present invention provides a fastening assembly for a tokamak device, used for the cladding and a vacuum chamber, the vacuum chamber being located behind the cladding, comprising a first connecting sleeve, a second connecting sleeve, a third connecting sleeve, a connecting bolt, a fixing block, and a locking block, wherein... The first connecting sleeve is used to connect with the cladding and is sleeved on the outside of the second connecting sleeve. The second connecting sleeve is sleeved on the outer periphery of the connecting bolt, and the connecting bolt is pressed against the second connecting sleeve from the rear. The connecting bolt, the locking block, and the fixing block are arranged sequentially from front to back. The third connecting sleeve is used to connect to the vacuum chamber and is sleeved on the outer periphery of the fixing block and the locking block. The connecting bolt is screwed to the third connecting sleeve. The fixing block is fixedly connected to the third connecting sleeve and elastically connected to the locking block, so that the locking block presses forward against the connecting bolt. The locking block is configured to be circumferentially fixed relative to the connecting bolt. One of the locking block and the connecting bolt is provided with a first abutting portion, and the other is provided with a first abutting groove. At least one of the first abutting portion and the first abutting groove is located in the circumferential direction of the connecting bolt, so that the first abutting portion extends into the first abutting groove, thereby restricting the connecting bolt from rotating about the central axis.

[0006] Optionally, the inner sidewall of the third connecting sleeve is provided with a plurality of first limiting portions along its circumference. The first limiting portions are located between the connecting bolt and the locking block. The first abutting portion is provided on the locking block, and the first abutting groove is provided on the connecting bolt. The first abutting portion protrudes inward from the first limiting portion. The first limiting portion can abut against the first abutting portion to restrict the locking block from rotating around the central axis of the connecting bolt.

[0007] Optionally, the rear end of the connecting bolt is provided with a connecting portion, the outer diameter of the connecting portion gradually decreases from front to back, the first abutting groove is provided on the periphery of the connecting bolt and is located inside the connecting portion, the first limiting portion is adapted to the periphery of the connecting portion, and the first limiting portion can abut against the periphery of the connecting portion. The inner wall of the third connecting sleeve is provided with a second limiting part, which can abut against the locking block rearward and against the connecting bolt forward.

[0008] Optionally, one of the locking block and the fixing block is provided with a second abutting part, and the other is provided with a second abutting groove. At least one of the second abutting part and the second abutting groove is arranged along the circumference of the connecting bolt. The second abutting part extends into the second abutting groove to restrict the locking block from rotating about the central axis of the connecting bolt.

[0009] Optionally, it also includes a push rod. The connecting bolt has a first through hole extending in the front-rear direction. The push rod is located in the first through hole and can move back and forth relative to the first through hole. The push rod moving backward can abut against the locking block to drive the locking block to move backward, causing the locking block to disengage from the connecting bolt.

[0010] Optionally, it also includes a rod spring and an abutment protrusion. The first through hole includes a first hole segment and a second hole segment connected sequentially from front to back. The inner diameter of the second hole segment is larger than the inner diameter of the first hole segment. The abutment protrusion is fixedly disposed in the second hole segment. The outer periphery of the push rod is provided with an abutment protrusion. The abutment protrusion is located in front of the abutment protrusion and in the second hole segment. The rod spring is sleeved on the outer periphery of the push rod, and the two ends of the rod spring abut against the abutment protrusion and the abutment protrusion, respectively. The push rod moving backward can cause the abutment protrusion to squeeze the rod spring, thereby compressing the rod spring and applying a forward force to the push rod.

[0011] Optionally, the first through hole includes a third hole segment and a first hole segment connected sequentially from front to back. The inner diameter of the third hole segment is larger than the inner diameter of the first hole segment, and the shape of the third hole segment projected in the front-back direction is a polygon.

[0012] Optionally, it also includes a spherical washer fitted around the outer periphery of the connecting bolt. The second connecting bolt has an abutment boss. The spherical washer is located between the abutment boss and the nut of the connecting bolt. The nut of the connecting bolt has a first spherical surface, and the spherical washer has a second spherical surface. The first spherical surface abuts against the second spherical surface.

[0013] Optionally, it also includes an anti-loosening cover, wherein the first connecting sleeve is sleeved on the outer periphery of the anti-loosening cover, and the inner sidewall of the first connecting sleeve is provided with a first anti-loosening thread and a second anti-loosening thread with opposite rotation directions from front to back. The anti-loosening cover is screwed to the first anti-loosening thread, the second connecting sleeve is screwed to the second anti-loosening thread, the rear sidewall of the anti-loosening cover abuts against the front sidewall of the second connecting sleeve, and the area where the anti-loosening cover abuts against the second connecting sleeve is provided with a plurality of pressing grooves.

[0014] Compared with the prior art, the fastening assembly of the tokamak device according to the present invention has the following advantages: In the fastening assembly of the present invention, a first connecting sleeve is connected to the cladding and sleeved on the outer periphery of a second connecting sleeve. The second connecting sleeve is sleeved on the outer periphery of a connecting bolt. A third connecting sleeve is connected to the vacuum chamber and screwed to the connecting bolt. The connecting bolt can be rotated to bring the vacuum chamber and the cladding closer together, thereby pressing against the third connecting sleeve and connecting the vacuum chamber and the cladding. Then, the third connecting sleeve is sleeved on the outer periphery of a locking block and a fixing block. The locking block and the fixing block are sequentially arranged behind the connecting bolt. The fixing block is fixedly connected to the third connecting sleeve and elastically connected to the locking block, giving the locking block a forward thrust so that the locking block can press against the connecting bolt to apply a preload to the connecting bolt. Moreover, the locking block is configured to be circumferentially fixed relative to the connecting bolt. The locking block and the connecting bolt extend into a first abutting groove through a first abutting part. The first abutting part can abut against the first abutting groove circumferentially to prevent the connecting bolt from rotating around its axis, thereby preventing the connecting bolt from loosening. In summary, the fastening assembly of the present invention can prevent the connecting bolts from loosening by applying a preload to the connecting bolts and preventing them from rotating by abutting them in the circumferential direction, thereby ensuring that the connection structure between the vacuum chamber and the cladding remains stable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the fastening assembly of the present invention.

[0016] Figure 2 A cross-sectional view of the tokamak device of the present invention at the location of the fastening component.

[0017] Figure 3 This is a schematic diagram showing a portion of the structure of the present invention, consisting of the third connecting sleeve, the locking block, the fixing block, and the first spring, cut off.

[0018] Figure 4 This is a cross-sectional view of the structure of the third connecting sleeve, the locking block, the fixing block and the first spring of the present invention.

[0019] Figure 5 This is a schematic diagram showing a portion of the third connecting sleeve of the present invention cut off.

[0020] Figure 6 This is a schematic diagram of the structure of the fixing block of the present invention.

[0021] Figure 7 This is a schematic diagram of the card block from one perspective of the present invention.

[0022] Figure 8 This is a schematic diagram of the card block of the present invention from another perspective.

[0023] Figure 9 This is a schematic diagram of the structure of the present invention, consisting of a first connecting sleeve, a second connecting sleeve, a connecting bolt, a spherical washer, and an anti-loosening cap.

[0024] Figure 10 This is a cross-sectional view of the structure composed of the first connecting sleeve, the second connecting sleeve, the connecting bolt, the spherical washer, and the components of the present invention.

[0025] Figure 11 This is a schematic diagram of the anti-loosening cap of the present invention.

[0026] Figure 12 This is a schematic diagram of the connecting bolt of the present invention extending into the third connecting sleeve.

[0027] Figure 13 This is a schematic diagram showing the connecting bolt of the present invention extending into the third connecting sleeve and pushing the push rod out of the first through hole.

[0028] Figure 14 This is a schematic diagram of the connecting bolt extending into the third connecting sleeve and the push rod being pushed out to abut against the locking block.

[0029] Figure 15 This is a schematic diagram of the connecting bolt of the present invention extending into the third connecting sleeve and pushing the locking block backward through the push rod.

[0030] Figure 16 This is a schematic diagram showing the fastening tool retracting from the rotating groove after the connecting bolts of the present invention have been installed.

[0031] Reference numerals: 1. First connecting sleeve; 11. First anti-loosening thread; 12. Second anti-loosening thread; 13. Third limiting part; 2. Second connecting sleeve; 21. Abutting boss; 3. Third connecting sleeve; 31. First limiting part; 32. Second interrupted thread; 33. Second limiting part; 4. Connecting bolt; 41. First abutting groove; 42. First through hole; 421. First hole segment; 422. Second hole segment; 423. Third hole segment; 43. Connecting part; 44. First interrupted thread; 45. First spherical surface; 46. Nut; 5. Fixing block; 51. Guide hole; 52. Second guide groove; 53. Second abutment groove; 6. Locking block; 61. First abutment part; 62. Second abutment part; 63. Guide post; 64. First guide groove; 7. Column spring; 8. Rod spring; 9. Push rod; 91. Abutment protrusion; 10. Abutment protrusion; 20. Spherical washer; 201. Second spherical surface; 30. Anti-loosening cover; 301. Pressing groove; 302. Second rotating through hole; 40. Front cover; 401. First rotating through hole; 100. Cladding layer; 1001. First mounting hole; 1002. Limiting groove; 200. Vacuum chamber; 2001. Second mounting hole; 300. First fastening tool. Detailed Implementation

[0032] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0033] In the description of this invention, it should be understood that the terms "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this 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 this invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] like Figures 1 to 16 As shown, a fastening assembly for a tokamak device according to the present invention is used for a cladding 100 and a vacuum chamber 200, the vacuum chamber 200 being located behind the cladding 100. The assembly includes a first connecting sleeve 1, a second connecting sleeve 2, a third connecting sleeve 3, a connecting bolt 4, a fixing block 5, and a locking block 6. The first connecting sleeve 1 is used to connect to the cladding 100 and is fitted over the outer side of the second connecting sleeve 2. The second connecting sleeve 2 is fitted over the outer periphery of the connecting bolt 4, and the connecting bolt 4 is rearwardly pressed against the second connecting sleeve 2. The connecting bolt 4, the locking block 6, and the fixing block 5 are arranged sequentially from front to back. The third connecting sleeve 3 is used to connect to the vacuum chamber 200 and is fitted over the fixing block 5. On the outer periphery of block 5 and the locking block 6, the connecting bolt 4 is screwed to the third connecting sleeve 3, the fixing block 5 is fixedly connected to the third connecting sleeve 3, and elastically connected to the locking block 6, so that the locking block 6 abuts against the connecting bolt 4. Furthermore, the locking block 6 is configured to be fixed circumferentially relative to the connecting bolt 4. One of the locking block 6 and the connecting bolt 4 is provided with a first abutting part 61, and the other is provided with a first abutting groove 41. At least one of the first abutting part 61 and the first abutting groove 41 is at least partially provided in the circumferential direction of the connecting bolt 4, so that the first abutting part 61 extends into the first abutting groove 41, which can restrict the connecting bolt 4 from rotating around the central axis.

[0036] In the above technical solution, the first connecting sleeve 1 is connected to the cladding 100 and sleeved on the outer periphery of the second connecting sleeve 2. The second connecting sleeve 2 is sleeved on the outer periphery of the connecting bolt 4. The third connecting sleeve 3 is connected to the vacuum chamber 200 and screwed to the connecting bolt 4. The connecting bolt 4 can be rotated to bring the vacuum chamber 200 and the cladding 100 closer together, and then press against the third connecting sleeve 3, connecting the vacuum chamber 200 and the cladding 100. Then, the third connecting sleeve 3 is sleeved on the outer periphery of the locking block 6 and the fixing block 5. The locking block 6 and the fixing block 5 are sequentially arranged on the connecting... Behind the connecting bolt 4, a fixing block 5 is fixedly connected to the third connecting sleeve 3. The fixing block 5 is elastically connected to the locking block 6 and provides a forward thrust to the locking block 6, allowing the locking block 6 to abut against the connecting bolt 4 to apply a preload to the connecting bolt 4. Furthermore, the locking block 6 is configured to be circumferentially fixed relative to the connecting bolt 4. The locking block 6 and the connecting bolt 4 extend into the first abutting groove 41 through the first abutting part 61. The first abutting part 61 can abut against the first abutting groove 41 circumferentially to prevent the connecting bolt 4 from rotating around its axis, thereby preventing the connecting bolt 4 from loosening. In summary, the fastening assembly of the present invention can prevent the connecting bolt 4 from loosening by applying a preload to it while preventing its rotation through circumferential abutment, thus ensuring the stable connection structure between the vacuum chamber 200 and the cladding 100.

[0037] As an example of this embodiment, the inner sidewall of the third connecting sleeve 3 is provided with a plurality of first limiting portions 31 along its circumference. The first limiting portions 31 are located between the connecting bolt 4 and the locking block 6. The first abutting portion 61 is provided on the locking block 6, and the first abutting groove 41 is provided on the connecting bolt 4. The first abutting portion 61 protrudes inward from the first limiting portion 31. The first limiting portion 31 can abut against the first abutting portion 61 to restrict the locking block 6 from rotating around the central axis of the connecting bolt 4.

[0038] Wherein, the part of the first abutting part 61 that does not protrude from the first limiting part 31 is used to abut against the first limiting part 31 to form a circumferential constraint on the locking block 6 and restrict the locking block 6 from rotating in the circumferential direction, and the part of the first abutting part 61 that protrudes from the first limiting part 31 is used to abut against the first abutting groove 41 to form a circumferential constraint on the connecting bolt 4 and restrict the connecting bolt 4 from rotating in the circumferential direction.

[0039] As an example of this embodiment, one of the locking block 6 and the fixing block 5 is provided with a guide post 63 along the axis of the connecting bolt 4, and the other is provided with a guide hole 51 corresponding to the guide post 63. The guide post 63 can be slidably connected to the guide hole 51 in the front-back direction. It also includes a column spring 7, which is sleeved on the outer periphery of the guide post 63. The rear sidewall of the locking block 6 is provided with a first guide groove 64, and the front sidewall of the fixing block 5 is provided with a second guide groove 52. The first guide groove 64 and the second guide groove 52 are arranged around the guide post 63, and the column spring 7 abuts against the bottom of the first guide groove 64 and the bottom of the second guide groove 52.

[0040] As an example of this embodiment, the outer peripheral wall of the connecting bolt 4 is provided with a first interrupted thread 44, and the inner peripheral wall of the third connecting sleeve 3 is provided with a second interrupted thread 32 for engagement, so that the connecting bolt 4 is connected to the third connecting sleeve 3, so as to facilitate the assembly and disassembly of the connecting bolt 4.

[0041] As an example of this embodiment, the rear end of the connecting bolt 4 is provided with a connecting portion 43, the outer diameter of the connecting portion 43 gradually decreases from front to back, the first abutting groove 41 is provided on the periphery of the connecting bolt 4 and is located within the connecting portion 43, the first limiting portion 31 is adapted to the periphery of the connecting portion 43 and the first limiting portion 31 can abut against the periphery of the connecting portion 43; the inner sidewall of the third connecting sleeve 3 is provided with a second limiting portion 33, the second limiting portion 33 is used to abut against the locking block 6 rearward and against the connecting bolt 4 forward.

[0042] The connecting bolt 4 can move backward until the connecting part 43 fits against the first limiting part 31 to restrict the connecting bolt 4 from moving backward. At this time, the first abutting part 61, which protrudes inward from the first limiting part 31, extends into the first abutting groove 41 to restrict the rotation of the connecting bolt 4 by abutting against the first abutting groove 41. In addition, the third connecting sleeve 3 is also provided with a second limiting part 33 to abut against the locking block 6 and the connecting bolt 4, thereby restricting the locking block 6 from moving forward and restricting the connecting bolt 4 from moving backward.

[0043] Specifically, the second limiting part 33 can be provided on the front side wall of the first limiting part 31.

[0044] As an example of this embodiment, one of the locking block 6 and the fixing block 5 is provided with a second abutting part 62 and the other is provided with a second abutting groove 53. At least one of the second abutting part 62 and the second abutting groove 53 is arranged along the circumference of the connecting bolt 4. The second abutting part 62 extends into the second abutting groove 53 to restrict the locking block 6 from rotating around the central axis of the connecting bolt 4.

[0045] In some embodiments, the fixing block 5 can always restrict the rotation of the locking block 6 through the second abutment part 62 and the second abutment groove 53. In other embodiments, when the locking block 6 is connected to the connecting bolt 4, the locking block 6 is in a forward position, and the first limiting part 31 restricts the rotation of the locking block 6. When the operation of removing and installing the connecting bolt 4 is carried out, the locking block 6 is pushed backward. At this time, the second abutment part 62 extends into the second abutment groove 53, so that even when the locking block 6 is in a backward position, the first abutment part 61 can still be aligned with the position between the two adjacent first limiting parts 31.

[0046] As an example of this embodiment, it also includes a push rod 9. The connecting bolt 4 is provided with a first through hole 42 that extends in the front-back direction. The push rod 9 is provided in the first through hole 42 and can move back and forth relative to the first through hole 42. The push rod 9 moving backward can abut against the locking block 6 to drive the locking block 6 to move backward, so that the locking block 6 and the connecting bolt 4 are disengaged.

[0047] When installing the connecting bolt 4, extend the push rod 9 forward and push the locking block 6 backward a distance. Then, screw the connecting bolt 4 to the desired position, reset the push rod 9, and then reset the locking block 6, which then abuts against the connecting bolt 4, and the first abutting part 61 extends into the first abutting groove 41. When removing the connecting bolt 4, extend the push rod 9 forward and push the locking block 6 backward a distance until the first abutting part 61 exits the first abutting groove 41, so that the connecting bolt 4 and the locking block 6 are separated. Then, screw the connecting bolt 4 out.

[0048] As an example of this embodiment, it also includes a rod spring 8 and an abutment protrusion 10. The first through hole 42 includes a first hole segment 421 and a second hole segment 422 connected sequentially from front to back. The inner diameter of the second hole segment 422 is larger than the inner diameter of the first hole segment 421. The abutment protrusion 10 is fixedly disposed in the second hole segment 422. The outer periphery of the push rod 9 is provided with an abutment protrusion 91. The abutment protrusion 91 is located in front of the abutment protrusion 10 and in the second hole segment 422. The rod spring 8 is sleeved on the outer periphery of the push rod 9, and the two ends of the rod spring 8 abut against the abutment protrusion 10 and the abutment protrusion 91, respectively. The push rod 9, which moves backward, can cause the abutment protrusion 91 to squeeze the rod spring 8, thereby compressing the rod spring 8 and applying a forward force to the push rod 9.

[0049] Among them, the rod spring 8, the abutting protrusion 10 and the abutting protrusion 91 form an elastic reset mechanism. The rod spring 8 is used to apply a rearward force to the push rod 9 so that the push rod 9 automatically resets to the forward direction after the external force is removed.

[0050] As an example of this embodiment, the first through hole 42 includes a third hole segment 423 and a first hole segment 421 that are connected sequentially from front to back. The inner diameter of the third hole segment 423 is larger than the inner diameter of the first hole segment 421, and the shape of the third hole segment 423 projected in the front-back direction is a polygon.

[0051] The third hole segment 423 is adapted to the first fastening tool 300. When the first fastening tool 300 is inserted into the third hole segment 423, the first fastening tool 300 can push the push rod 9 backward. When the first fastening tool 300 rotates within the third hole segment 423, the first fastening tool 300 abuts against the hole wall of the third hole segment 423, causing the connecting bolt 4 and the first fastening tool 300 to rotate together.

[0052] As an example of this embodiment, a spherical washer 20 is further included, which is sleeved on the outer periphery of the connecting bolt 4. The second connecting sleeve 2 is provided with an abutment boss 21. The spherical washer 20 is disposed between the abutment boss 21 and the nut 46 of the connecting bolt 4. The nut 46 of the connecting bolt 4 is provided with a first spherical surface 45, and the spherical washer 20 is provided with a second spherical surface 201. The first spherical surface 45 abuts against the second spherical surface 201, so that when the connecting bolt 4 is installed, the connecting bolt 4 can rotate around the center of the spherical surface, so that the connecting bolt 4 has a certain position adjustment function.

[0053] As an example of this embodiment, it also includes an anti-loosening cover 30. The first connecting sleeve 1 is sleeved on the outer periphery of the anti-loosening cover 30. The inner sidewall of the first connecting sleeve 1 is provided with a first anti-loosening thread 11 and a second anti-loosening thread 12 with opposite rotation directions from front to back. The anti-loosening cover 30 is screwed to the first anti-loosening thread 11, and the second connecting sleeve 2 is screwed to the second anti-loosening thread 12. The rear sidewall of the anti-loosening cover 30 abuts against the front sidewall of the second connecting sleeve 2. The area of ​​the anti-loosening cover 30 that abuts against the second connecting sleeve 2 is provided with a plurality of pressing grooves 301.

[0054] Among them, the structure of pressing the second connecting sleeve 2 with the pressing groove 301 at the rear end face of the anti-loosening cover 30 can effectively improve the pressing friction. Moreover, the two sets of anti-loosening threads with opposite directions are connected to the anti-loosening cover 30 and the second connecting sleeve 2 respectively, forming a reverse thread interlocking structure, which further suppresses the loosening trend.

[0055] As an example of this embodiment, a front cover 40 is also included. The front cover 40 is disposed at the front end of the second connecting sleeve 2 and fixedly connected to the second connecting sleeve 2. The front cover 40 has a first rotating through hole 401 extending in the front-rear direction. The anti-loosening cover 30 is located in front of the front cover 40. The anti-loosening cover 30 has a second rotating through hole 302 extending in the front-rear direction. The rear sidewall of the anti-loosening cover 30 applies a rearward pre-tightening force to the second connecting sleeve 2 by pressing against the front cover 40. The first rotating through hole 401 and the second rotating through hole... The first fastening tool 300 can pass through the first rotating through hole 401 and the second rotating through hole 302 and extend into the rotating hole to rotate the connecting bolt 4. The second fastening tool can pass through the second rotating through hole 302 and extend into the first rotating through hole 401 to rotate the front cover 40, thereby driving the second connecting sleeve 2 to rotate. The third fastening tool extends into the second rotating through hole 302 to rotate the anti-loosening cover 30. The rotating hole can be a polygonal groove, and the first rotating through hole 401 and the second rotating through hole 302 can be polygonal holes.

[0056] As an example of this embodiment, the first connecting sleeve 1 is slidably connected to the first mounting hole 1001 in the front-back direction. The first mounting hole 1001 passes through the cladding 100 in the front-back direction. The front side wall of the cladding 100 is provided with a limiting groove 1002 extending in the front-back direction. The limiting groove 1002 is connected to the first mounting hole 1001. The outer peripheral wall of the first connecting part 43 is provided with a third limiting part 13. The third limiting part 13 abuts against the bottom of the limiting groove 1002 in the rearward direction. The third connecting sleeve 3 is threadedly connected to the second mounting hole 2001.

[0057] like Figure 2 This embodiment also relates to a tokamak device, including a vacuum chamber 200, a cladding 100, and the aforementioned fastening assembly. The rear sidewall of the cladding 100 is provided with a first mounting hole 1001, and the first connecting sleeve 1 is connected to the first mounting hole 1001. The front sidewall of the vacuum chamber 200 is provided with a second mounting hole 2001, and the third connecting sleeve 3 is connected to the second mounting hole 2001.

[0058] As an example of this embodiment, fixed setting and fixed connection refer to the fixed relative positional relationship of two components, including but not limited to fixing by connectors, fixing by welding, fixing by adhesive, fixing by integral molding, and fixing by snap-fit ​​connection.

[0059] As an example of this embodiment, sliding connection and sliding setting refer to the connection between two connected components, where one component can slide along a fixed trajectory on the other component, including but not limited to connecting by sliding a slider into a groove or connecting by inserting a slider rod into a hole whose size and profile match the slider rod.

[0060] As an example of this embodiment, a rotatable connection or rotatable setting refers to the fact that two connected components can rotate, including but not limited to connections through bearings or connections through clearance fits.

[0061] As one example of this embodiment, the connectors include, but are not limited to, fasteners, straps, ropes, pneumatic connectors, hydraulic connectors, flanges, Velcro, and buttons.

[0062] In summary, the embodiments of the present invention provide a fastening component for a tokamak device, the technical effects of which are as follows: The first connecting sleeve 1 is connected to the cladding 100 and is fitted onto the outer periphery of the second connecting sleeve 2. The second connecting sleeve 2 is fitted onto the outer periphery of the connecting bolt 4. The third connecting sleeve 3 is connected to the vacuum chamber 200 and screwed onto the connecting bolt 4. By rotating, the connecting bolt 4 can bring the vacuum chamber 200 and the cladding 100 closer together, thereby pressing against the third connecting sleeve 3 and connecting the vacuum chamber 200 and the cladding 100. Then, the third connecting sleeve 3 is fitted onto the outer periphery of the locking block 6 and the fixing block 5. The locking block 6 and the fixing block 5 are sequentially located on the connecting bolt 4. Behind the bolt, the fixing block 5 is fixedly connected to the third connecting sleeve 3. The fixing block 5 is elastically connected to the locking block 6 and provides a forward thrust to the locking block 6, so that the locking block 6 can abut against the connecting bolt 4 to apply a preload to the connecting bolt 4. Moreover, the locking block 6 is configured to be circumferentially fixed relative to the connecting bolt 4. The locking block 6 and the connecting bolt 4 extend into the first abutting groove 41 through the first abutting part 61. The first abutting part 61 can abut against the first abutting groove 41 circumferentially to prevent the connecting bolt 4 from rotating about its axis, thereby preventing the connecting bolt 4 from loosening. In summary, the fastening assembly of the present invention can prevent the connecting bolt 4 from loosening by abutting against it circumferentially while applying a preload to it, so that the connection structure between the vacuum chamber 200 and the cladding 100 can remain stable.

[0063] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A fastening assembly for a tokamak device, for a cladding (100) and a vacuum chamber (200), the vacuum chamber (200) being located behind the cladding (100), characterized in that, It includes a first connecting sleeve (1), a second connecting sleeve (2), a third connecting sleeve (3), a connecting bolt (4), a fixing block (5), and a locking block (6), wherein, The first connecting sleeve (1) is used to connect with the cladding (100) and is sleeved on the outside of the second connecting sleeve (2). The second connecting sleeve (2) is sleeved on the outer periphery of the connecting bolt (4), and the connecting bolt (4) is pressed against the second connecting sleeve (2) from the rear. The connecting bolt (4), the locking block (6), and the fixing block (5) are arranged sequentially from front to back. The third connecting sleeve (3) is used to connect with the vacuum chamber (200) and is sleeved on the outer periphery of the fixing block (5) and the locking block (6). The connecting bolt (4) is screwed to the third connecting sleeve (3). The fixing block (5) is fixedly connected to the third connecting sleeve (3) and elastically connected to the locking block (6), so that the locking block (6) presses against the connecting bolt (4) forward. The locking block (6) is configured to be circumferentially fixed relative to the connecting bolt (4). One of the locking block (6) and the connecting bolt (4) is provided with a first abutting part (61) and the other is provided with a first abutting groove (41). At least one of the first abutting part (61) and the first abutting groove (41) is located in the circumferential direction of the connecting bolt (4), so that the first abutting part (61) extends into the first abutting groove (41), thereby restricting the connecting bolt (4) from rotating about the central axis.

2. The fastening assembly of the tokamak device according to claim 1, characterized in that, The inner sidewall of the third connecting sleeve (3) is provided with a plurality of first limiting parts (31) along its circumference. The first limiting parts (31) are located between the connecting bolt (4) and the locking block (6). The first abutting part (61) is provided on the locking block (6). The first abutting groove (41) is provided on the connecting bolt (4). The first abutting part (61) protrudes inward from the first limiting part (31). The first limiting part (31) can abut against the first abutting part (61) to restrict the locking block (6) from rotating around the central axis of the connecting bolt (4).

3. The fastening assembly of the tokamak device according to claim 2, characterized in that, The connecting bolt (4) has a connecting part (43) at its rear end. The outer diameter of the connecting part (43) gradually decreases from front to back. The first abutting groove (41) is provided on the periphery of the connecting bolt (4) and is located in the connecting part (43). The first limiting part (31) is adapted to the periphery of the connecting part (43) and can abut against the periphery of the connecting part (43). The inner sidewall of the third connecting sleeve (3) is provided with a second limiting part (33), which can abut against the locking block (6) rearward and against the connecting bolt (4) forward.

4. The fastening assembly of the tokamak device according to claim 1, characterized in that, One of the locking block (6) and the fixing block (5) is provided with a second abutting part (62) and the other is provided with a second abutting groove (53). At least part of the second abutting part (62) and the second abutting groove (53) are arranged along the circumference of the connecting bolt (4). The second abutting part (62) extends into the second abutting groove (53) to restrict the locking block (6) from rotating about the central axis of the connecting bolt (4).

5. The fastening assembly of the tokamak device according to claim 1, characterized in that, It also includes a push rod (9), the connecting bolt (4) is provided with a first through hole (42) extending in the front-back direction, the push rod (9) is provided in the first through hole (42) and can move back and forth relative to the first through hole (42), and the push rod (9) moving backward can abut against the locking block (6) to drive the locking block (6) to move backward, so that the locking block (6) and the connecting bolt (4) are separated.

6. The fastening assembly of the tokamak device according to claim 5, characterized in that, It also includes a rod spring (8) and an abutment protrusion (10). The first through hole (42) includes a first hole segment (421) and a second hole segment (422) connected sequentially from front to back. The inner diameter of the second hole segment (422) is larger than the inner diameter of the first hole segment (421). The abutment protrusion (10) is fixedly disposed in the second hole segment (422). The outer periphery of the push rod (9) is provided with an abutment protrusion (91). The abutment protrusion (91) is located in front of the abutment protrusion (10) and is located in the second hole segment (422). The rod spring (8) is sleeved on the outer periphery of the push rod (9), and the two ends of the rod spring (8) abut against the abutment protrusion (10) and the abutment protrusion (91) respectively. The push rod (9) moving backward can cause the abutment protrusion (91) to squeeze the rod spring (8), thereby compressing the rod spring (8) and applying a forward force to the push rod (9).

7. The fastening assembly of the tokamak device according to claim 5, characterized in that, The first through hole (42) includes a third hole segment (423) and a first hole segment (421) connected sequentially from front to back. The inner diameter of the third hole segment (423) is larger than the inner diameter of the first hole segment (421). The shape of the third hole segment (423) projected in the front-back direction is a polygon.

8. The fastening assembly of the tokamak device according to claim 1, characterized in that, It also includes a spherical washer (20) sleeved on the outer periphery of the connecting bolt (4), the second connecting sleeve (2) is provided with an abutment boss (21), the spherical washer (20) is provided between the abutment boss (21) and the nut (46) of the connecting bolt (4), and the nut (46) of the connecting bolt (4) is provided with a first spherical surface, and the spherical washer (20) is provided with a second spherical surface (201), the first spherical surface abutting against the second spherical surface (201).

9. The fastening assembly of the tokamak device according to claim 1, characterized in that, It also includes a locking cover (30), the first connecting sleeve (1) is sleeved on the outer periphery of the locking cover (30), the inner sidewall of the first connecting sleeve (1) is provided with a first locking thread (11) and a second locking thread (12) with opposite rotation directions from front to back, the locking cover (30) is screwed to the first locking thread (11), the second connecting sleeve (2) is screwed to the second locking thread (12), the rear sidewall of the locking cover (30) abuts against the front sidewall of the second connecting sleeve (2), and the area where the locking cover (30) abuts against the second connecting sleeve (2) is provided with a plurality of pressing grooves (301).

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