Vacuum chamber for a nuclear fusion device and nuclear fusion device

Abstract

This invention discloses a vacuum chamber and a nuclear fusion device for a nuclear fusion apparatus, relating to the field of nuclear technology. The invention includes: a vacuum chamber body comprising an inner wall and an outer wall, the inner and outer walls being connected and jointly defining a vacuum chamber interlayer; a shielding structure disposed within the vacuum chamber interlayer; and a connecting structure disposed within the vacuum chamber interlayer and connected to the vacuum chamber body. The connecting structure is configured as a fixed shielding structure, comprising: multiple shielding plates arranged along the thickness direction of the inner wall; an insulating layer is provided between each pair of adjacent shielding plates, and at the end of the outermost shielding plate facing away from the other shielding plates. By setting a shielding structure within the vacuum chamber interlayer, neutrons can be effectively shielded, extending the service life of the nuclear fusion apparatus. Furthermore, the connecting structure provides a stable and secure installation of the shielding structure. In addition, the structure is compact and adaptable to vacuum chambers of various sizes, exhibiting high versatility.

Description

Technical Field

[0001] This invention relates to the field of nuclear fusion technology, and in particular to a vacuum chamber and a nuclear fusion device. Background Technology

[0002] In related technologies, the vacuum chamber, as one of the core components of a tokamak device, provides and maintains an ultra-high vacuum environment for plasma operation. During plasma operation, the deuterium-tritium reaction produces a large number of high-energy neutrons with extremely strong penetrating power. These neutrons directly contact key structures such as superconducting magnets, which will greatly reduce the service life of these structures and damage the overall lifespan of the nuclear fusion device. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a vacuum chamber for a nuclear fusion device that can effectively shield neutrons, extend the service life of the nuclear fusion device, and is highly versatile and applicable to most vacuum chambers.

[0004] The present invention further proposes a nuclear fusion device.

[0005] The vacuum chamber of the nuclear fusion device according to the present invention includes: a vacuum chamber body, the vacuum chamber body including: an inner wall and an outer wall, the inner wall and the outer wall being connected and jointly defining a vacuum chamber interlayer; a shielding structure disposed within the vacuum chamber interlayer; and a connecting structure disposed within the vacuum chamber interlayer and connected to the vacuum chamber body, the connecting structure being configured as a fixed shielding structure.

[0006] The vacuum chamber of the nuclear fusion device according to the present invention can effectively shield neutrons by setting a shielding structure in the vacuum chamber interlayer, thereby extending the service life of the nuclear fusion device. Moreover, by setting a connecting structure, the shielding structure can be firmly fixed, resulting in better installation stability. In addition, the structure is ingenious and can be applied to vacuum chambers of various sizes, making it highly versatile.

[0007] In some examples of the present invention, the shielding structure includes: a plurality of shielding plates arranged along the thickness direction of the inner wall.

[0008] In some examples of the present invention, the shielding structure further includes: multiple insulating layers, wherein an insulating layer is provided between each pair of adjacent shielding plates and at the end of the outermost shielding plate facing away from the other shielding plates along the arrangement direction of the multiple shielding plates.

[0009] In some examples of the present invention, the thickness of the shielding structure is no more than half the thickness of the vacuum chamber interlayer and is spaced apart from both the inner and outer walls.

[0010] In some examples of the present invention, multiple shielding structures are arranged circumferentially along the vacuum chamber and configured as a shielding group, and multiple shielding groups are arranged along the polar direction of the vacuum chamber.

[0011] In some examples of the present invention, any two adjacent shielding structures are spaced apart along the circumferential direction of the vacuum chamber, and any two adjacent shielding structures are spaced apart along the polar direction of the vacuum chamber.

[0012] In some examples of the present invention, the connection structure includes: a connecting rod and a nut. The connecting rod is connected to the vacuum chamber body and passes through the shielding structure. The nut is sleeved on the connecting rod and threadedly engaged with the connecting rod. Nuts are provided at both ends of the shielding structure.

[0013] In some examples of the present invention, the shielding structure is formed with a mating hole, through which a connecting rod passes. The mating hole extends circumferentially along the vacuum chamber such that the circumferential dimension of the mating hole along the vacuum chamber is larger than the circumferential dimension of the connecting rod along the vacuum chamber.

[0014] In some examples of the present invention, the connecting rod is connected to both the inner wall and the outer wall; or, the vacuum chamber body further includes: a reinforcing rib, which is disposed in the vacuum chamber interlayer and connected to both the inner wall and the outer wall, and the connecting rod is disposed on the reinforcing rib; or, the vacuum chamber body further includes: a mounting rail, which is provided on the surfaces of the inner wall and the outer wall facing each other, and the connecting rod is disposed on the mounting rail.

[0015] The nuclear fusion device according to the present invention includes the vacuum chamber of the nuclear fusion device described above.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a pole cross-sectional view of one embodiment of the vacuum chamber according to an embodiment of the present invention; Figure 2 This is a circumferential cross-sectional view of another embodiment of the vacuum chamber according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of 1 / 8 sector of the vacuum chamber according to an embodiment of the present invention; Figure 4 This is a schematic diagram of 1 / 8 sector (showing the top) of the vacuum chamber according to an embodiment of the present invention. Figure 5 This is a two-dimensional cross-sectional view of the neutron shielding effect of the vacuum chamber according to an embodiment of the present invention; Figure 6 This is a two-dimensional cross-sectional view of the neutron shielding effect of the ITER internal shielding structure.

[0019] Figure label: Vacuum chamber 100; Vacuum chamber body 1; inner wall 11; outer wall 12; vacuum chamber interlayer 13; reinforcing rib 14; window 15; Shielding structure 2; shielding plate 21; insulation layer 22; Connection structure 3; connecting rod 31; mating hole 32; connecting nut 33; Shielding group 4; Nuclear fusion device 200. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] The following is for reference. Figures 1-6 The vacuum chamber 100 of the nuclear fusion device 200 according to an embodiment of the present invention is described.

[0022] like Figures 1-4 As shown, the vacuum chamber 100 of the nuclear fusion device 200 according to the present invention includes: a vacuum chamber body 1, the vacuum chamber body 1 including: an inner wall 11 and an outer wall 12, the inner wall 11 and the outer wall 12 being connected and jointly defining a vacuum chamber interlayer 13; a shielding structure 2, the shielding structure 2 being disposed within the vacuum chamber interlayer 13; and a connecting structure 3, the connecting structure 3 being disposed within the vacuum chamber interlayer 13 and connected to the vacuum chamber body 1, the connecting structure 3 being configured to fix the shielding structure 2.

[0023] The vacuum chamber body 1 includes an inner wall 11 and an outer wall 12. In some embodiments of this application, the inner wall 11 and the outer wall 12 are welded together. The inner wall 11 and the outer wall 12 are connected so that they together define the vacuum chamber interlayer 13. In some embodiments of this application, the shielding structure 2 may include a multi-layer shielding plate 21. The vacuum chamber interlayer 13 can accommodate the shielding structure 2, so that the shielding structure 2 can reliably perform neutron shielding within the vacuum chamber interlayer 13, extending the service life of the nuclear fusion device 200.

[0024] The connecting structure 3 is disposed within the vacuum chamber interlayer 13 and is connected to the vacuum chamber body 1. In some embodiments of this application, the connecting structure 3 is welded to the vacuum chamber body 1. In some embodiments of this application, the connecting structure 3 is snap-fitted to the vacuum chamber body 1. The connecting structure 3 can fix the shielding structure 2. In some embodiments of this application, the connecting structure 3 includes a connecting rod and nuts. The connecting rod passes through the shielding structure 2, and two nuts are respectively disposed on both sides of the shielding structure 2 along its thickness direction and screwed onto the connecting rod. By rotating the two nuts to move them closer to each other, the shielding structure 2 can be clamped between the two nuts, thereby placing the shielding structure 2 on the connecting rod and forming a stable fixed constraint in the polar and radial directions.

[0025] As some embodiments of this application, both ends of the connecting rod are welded to the inner wall 11 and the outer wall 12 respectively, so that the shielding structure 2 is disposed in the vacuum chamber interlayer 13 through the connecting structure 3, which is beneficial to improving the stability of the shielding structure 2. It is understood that the shielding structure 2 can be used in the vacuum chamber 100 of nuclear fusion devices 200 within a certain size range.

[0026] As some embodiments of this application, a cooling medium is provided in the vacuum chamber interlayer 13 to reduce the risk of material softening and deformation caused by excessive temperature and improve the reliability of vacuum sealing. The cooling medium can be an insulating medium, such as methyl silicone oil, phenyl silicone oil, synthetic ester insulating oil and other insulating cooling oils.

[0027] Therefore, by setting the shielding structure 2 in the vacuum chamber interlayer 13, neutrons can be effectively shielded, extending the service life of the nuclear fusion device 200. Moreover, by setting the connecting structure 3, the shielding structure 2 can be firmly fixed, resulting in better installation stability. In addition, the structure is ingenious and can be applied to vacuum chambers 100 of various sizes, making it highly versatile.

[0028] As some embodiments of this application, the vacuum chamber 100 can be divided into multiple sectors in the circumferential direction. Along the circumferential direction, a shielding structure 2 is provided in the vacuum chamber interlayer 13 of one sector. In other words, the size of the shielding structure 2 along the circumferential direction is adapted to the size of the vacuum chamber interlayer 13 along the circumferential direction. Compared with the traditional shielding scheme, this arrangement can improve the shielding capability.

[0029] In some examples of the present invention, such as Figure 1 , Figure 2 , Figure 4 As shown, the shielding structure 2 includes: multiple shielding plates 21, which are arranged along the thickness direction of the inner wall 11.

[0030] In some embodiments of this application, five shielding plates 21 are constructed. In some embodiments of this application, six shielding plates 21 are constructed. Multiple shielding plates 21 are arranged along the thickness direction of the inner wall 11. In some embodiments of this application, the multiple shielding plates 21 can be constructed from the same material. In some embodiments of this application, the multiple shielding plates 21 can be constructed from different materials. In some embodiments of this application, the material of the shielding plates 21 can be, but is not limited to, boronized polyethylene. By providing multiple shielding plates 21, the shielding structure 2 can have a stronger neutron shielding capability, improving the shielding effect and reliability.

[0031] In some examples of the present invention, such as Figure 4 As shown, the shielding structure 2 also includes multiple insulating layers 22, with an insulating layer 22 provided between each pair of adjacent shielding plates 21 and at the end of the outermost shielding plate 21 facing away from the other shielding plates 21 along the arrangement direction of the multiple shielding plates 21.

[0032] In some embodiments of this application, the insulating layer 22 is configured with six layers. In some embodiments of this application, the insulating layer 22 is configured with seven layers. An insulating layer 22 is provided between every two adjacent shielding plates 21, and along the arrangement direction of the plurality of shielding plates 21, the outermost shielding plate 21 also has an insulating layer 22 at the end facing away from the other shielding plates 21. This arrangement ensures that an insulating layer 22 is provided between any two shielding plates 21, between a shielding plate 21 and the inner wall 11, and between a shielding plate 21 and the outer wall 12, thereby reducing the electromagnetic force load caused by the induced current, reducing the internal stress caused by the electromagnetic force load, and reducing the impact on the overall resistance of the vacuum chamber 100.

[0033] The insulating layer 22 between any two adjacent shielding plates 21 completely fills the gap between them. This arrangement helps reduce structural complexity, simplifies assembly, and enhances applicability.

[0034] In some examples of the present invention, such as Figure 1 As shown, the thickness of the shielding structure 2 is no more than half the thickness of the vacuum chamber interlayer 13 and is spaced apart from both the inner wall 11 and the outer wall 12.

[0035] In some embodiments of this application, the thickness of the shielding structure 2 is less than half the thickness of the vacuum chamber interlayer 13. In some embodiments of this application, the thickness of the shielding structure 2 is equal to half the thickness of the vacuum chamber interlayer 13. Furthermore, the shielding structure 2 is spaced apart from both the inner wall 11 and the outer wall 12. This arrangement allows for a reasonable configuration of the shielding structure 2, ensuring sufficient gaps between the shielding structure 2 and the inner wall 11, and between the shielding structure 2 and the outer wall 12. This reduces the risk of electrical continuity caused by contact between the shielding structure 2 and the inner wall 11 or outer wall 12 when the shielding structure 2 deforms.

[0036] In some examples of the present invention, such as Figure 2 As shown, multiple shielding structures 2 are arranged circumferentially along the vacuum chamber 100 and are constructed as a group of shielding groups 4. Multiple groups of shielding groups 4 are arranged along the polar direction of the vacuum chamber 100.

[0037] In this embodiment, multiple shielding structures 2 are arranged circumferentially along the vacuum chamber 100. The multiple shielding structures 2 arranged circumferentially form a shielding group 4. The multiple shielding groups 4 are arranged along the polar direction of the vacuum chamber 100. As some embodiments of this application, the polar length of the multilayer shielding plate 21 is determined after actual load verification. This arrangement can adapt to the cavity shape of the vacuum chamber 100, which is conducive to building an all-round radiation shielding system without dead angles in the vacuum chamber interlayer 13. It eliminates the shielding blind zone of the vacuum chamber 100 in the circumferential direction through the circumferential arrangement, and covers the upper and lower areas of the vacuum chamber 100 with the help of the multiple polar arrangement, completely wrapping the inner wall 11 of the vacuum chamber 100 to achieve a complete shielding effect.

[0038] In some examples of the present invention, such as Figure 2 As shown, any two adjacent shielding structures 2 are spaced apart along the circumferential direction of the vacuum chamber 100, and any two adjacent shielding structures 2 are spaced apart along the polar direction of the vacuum chamber 100.

[0039] In this configuration, any two adjacent shielding structures 2 are spaced apart along the circumference of the vacuum chamber 100, and any two adjacent shielding structures 2 are spaced apart along the polar direction of the vacuum chamber 100. This spaced arrangement can adapt to the cavity shape of the vacuum chamber 100, avoid the waste of overlapping shielding structures 2, reserve space for thermal expansion to cope with thermal stress deformation during the operation of the nuclear fusion device 200, ensure no blind spots in radiation shielding, facilitate the installation of the connecting structure 3 in the vacuum chamber interlayer 13, and reduce the risk of electrical connection caused by multiple shielding structures 2 contacting each other when the shielding structure 2 deforms. In addition, multiple shielding structures 2 can be combined to adapt to different shapes, reducing the manufacturing difficulty of the shielding structure 2.

[0040] In some examples of the present invention, such as Figure 1 , Figure 4 As shown, the connecting structure 3 includes: a connecting rod 31 and a connecting nut 33. The connecting rod 31 is connected to the vacuum chamber body 1 and passes through the shielding structure 2. The connecting nut 33 is sleeved on the connecting rod 31 and threadedly engaged with the connecting rod 31. Both ends of the shielding structure 2 are provided with connecting nuts 33.

[0041] In some embodiments of this application, the connecting rod 31 is welded to the vacuum chamber body 1. In some embodiments of this application, the connecting rod 31 is indirectly connected to the vacuum chamber body 1. The connecting rod 31 passes through the shielding structure 2, and the connecting nut 33 is sleeved on the connecting rod 31, with the connecting nut 33 threadedly engaged with the connecting rod 31. Along the thickness direction of the shielding structure 2, both ends of the shielding structure 2 are provided with connecting nuts 33. By rotating the two connecting nuts 33 to move them closer to each other, the shielding structure 2 can be clamped between the two connecting nuts 33, thereby placing the shielding structure 2 on the connecting rod 31 and forming a stable fixed constraint in the polar and radial directions.

[0042] Specifically, one end of the connecting rod 31 is welded to one of the inner walls 11 or the outer walls 12. One connecting nut 33 is fitted onto the connecting rod 31, with the nut 33 threaded into the rod 31. The connecting nut 33 is rotated to position itself appropriately. The insulating layer 22 and the shielding plate 21 are installed layer by layer. After the shielding structure 2 and the insulating layer 22 are installed, the other connecting nut 33 is fitted onto the connecting rod 31, and the two nuts 33 engage to constrain the shielding structure 2. The other end of the connecting rod 31 is welded to the other of the inner walls 11 or the outer walls 12, thus successfully completing the installation and manufacturing of the entire vacuum chamber 100.

[0043] In some embodiments of this application, an insulating gasket and an insulating layer 22 are sequentially provided between the connecting nut 33 and the shielding plate 21, which can reduce the impact on the overall resistance of the vacuum chamber 100. In some embodiments of this application, depending on the resistance requirements of the nuclear fusion device 200 for the vacuum chamber 100, the insulating layer 22 can be provided, or it can be provided selectively.

[0044] In some examples of the present invention, such as Figure 4 As shown, the shielding structure 2 has a mating hole 32, and the connecting rod 31 passes through the mating hole 32. The mating hole 32 extends circumferentially along the vacuum chamber 100 so that the size of the mating hole 32 along the circumferential direction of the vacuum chamber 100 is larger than the size of the connecting rod 31 along the circumferential direction of the vacuum chamber 100.

[0045] The shielding structure 2 has a mating hole 32, through which the connecting rod 31 passes, allowing the connecting rod 31 to pass through the shielding structure 2. The mating hole 32 extends circumferentially along the vacuum chamber 100, such that the circumferential dimension of the mating hole 32 along the vacuum chamber 100 is larger than the circumferential dimension of the connecting rod 31 along the vacuum chamber 100. This arrangement allows the shielding structure 2 to have a certain degree of deformation and freedom in the circumferential direction, reducing stress caused by temperature difference and electromagnetic effects. As some embodiments of this application, the circumferential dimension of the mating hole 32 along the vacuum chamber 100 is larger than the circumferential dimension of the connecting rod 31 along the vacuum chamber 100, but smaller than the outer diameter of the connecting nut 33. For example, the mating hole 32 is constructed as an oblong hole, which helps to ensure the fixing effect of the connecting structure 3 while allowing for dimensional margins in installation and manufacturing.

[0046] As some embodiments of this application, the fitting hole 32 can ensure the flow of cooling medium in the vacuum chamber 100 to a certain extent. Smooth flow of cooling medium helps to maintain the stable working temperature of the shielding structure 2 and reduces the risk of thermal deformation or shielding performance degradation of the shielding structure 2 due to high temperature.

[0047] As some embodiments of this application, such as Figures 2-4 As shown, the vacuum chamber body 1 has a window 15, and the window 15 has a shielding structure 2 on both sides along the circumference. This structure is reasonable, as it can minimize the shielding blind zone and does not block the window 15.

[0048] In some examples of the present invention, such as Figure 1 , Figure 4 As shown, the connecting rod 31 is connected to both the inner wall 11 and the outer wall 12; or, the vacuum chamber body 1 further includes: a reinforcing rib 14, which is disposed in the vacuum chamber interlayer 13 and connected to both the inner wall 11 and the outer wall 12, and the connecting rod 31 is disposed on the reinforcing rib 14; or, the vacuum chamber body 1 further includes: a mounting rail, which is provided on the surfaces of the inner wall 11 and the outer wall 12 facing each other, and the connecting rod 31 is disposed on the mounting rail.

[0049] like Figure 3 , 4As shown in some embodiments of this application, the connecting rod 31 is welded to both the inner wall 11 and the outer wall 12. In some embodiments of this application, the vacuum chamber body 1 also includes a reinforcing rib 14, which is disposed in the vacuum chamber interlayer 13 and welded to both the inner wall 11 and the outer wall 12. The reinforcing rib 14 can be welded with two connecting plates, which are spaced apart along the thickness direction of the shielding plate 21. Each connecting plate includes a first plate and a second plate, which are fixedly connected to form an "L" shape. The first plates of the two connecting plates are welded to the reinforcing rib 14. The two ends of the connecting rod 31 are welded to the second plates of the two connecting plates, so that the connecting rod 31 is indirectly disposed on the reinforcing rib 14 through the connecting plates. This arrangement reduces the impact of installing the shielding structure 2 and the connecting structure 3 on the inner wall 11 and the outer wall 12 of the vacuum chamber 100, particularly reducing the welding requirements of the inner wall 11 and the outer wall 12, and further reducing the risk of leakage in the vacuum chamber 100.

[0050] As some embodiments of this application, the vacuum chamber body 1 also includes mounting rails that extend along the polar direction. Mounting rails are provided on the surfaces of the inner wall 11 and the outer wall 12 facing each other. Connecting rods 31 are provided on the mounting rails. The shielding plate 21 is mounted on the guide rail via the connecting rods 31, or the shielding plate 21 is mounted on the guide rail via the connecting rods 31 and the tenon structure in parallel. This can constrain the polar and radial positions of the shielding plate 21, further reducing the difficulty of installing and manufacturing the vacuum chamber 100.

[0051] As some embodiments of this application, the vacuum chamber 100 can be divided into multiple sectors in the circumferential direction, wherein a reinforcing rib 14 is provided inside the high field side along the circumferential center, and three reinforcing ribs 14 are uniformly provided inside the low field side along the circumferential direction.

[0052] As some embodiments of this application, the reinforcing rib 14 is provided with shielding structures 2 on both sides along the circumferential direction.

[0053] It should be noted that, Figure 1 and Figure 2 The diagrams shown are not the poloidal and circumferential cross-sectional views of the same nuclear fusion device 200. Figure 1 and Figure 2 The details of the illustrated nuclear fusion device 200 differ, for example... Figure 1 and Figure 2The shielding structure 2 of the vacuum chamber 100 of the nuclear fusion device 200 shown is different. The nuclear fusion device 200 according to the present invention includes the vacuum chamber 100 described above. By providing the shielding structure 2 within the vacuum chamber interlayer 13, neutrons can be effectively shielded, extending the service life of the nuclear fusion device 200. Furthermore, by providing the connecting structure 3, the shielding structure 2 can be securely fixed, resulting in better installation stability. In addition, the structure is compact and can be applied to vacuum chambers 100 of various sizes, exhibiting high versatility.

[0054] During and for a period after the operation of a nuclear fusion reactor, the main radiation source generated by plasma combustion is generally high-energy neutrons, among which 14 MeV high-energy neutrons are the most common. To evaluate the reliability of this invention for radiation shielding, a Monte Carlo simulation was used to construct a vacuum chamber 100 structural model proposed in this invention, and a housing structural model used for the internal shielding of ITER (International Thermonuclear Experimental Reactor). The shielding effectiveness of both models under a uniform monoenergetic fast neutron irradiation field of 14 MeV was simulated and evaluated. The calculation results are shown in the table below:

[0055] like Figure 5 and Figure 6 As shown, Figure 5 This is a two-dimensional cross-sectional view of the neutron shielding effect of the vacuum chamber 100 proposed in this application. Figure 6 This is a two-dimensional cross-sectional view of the neutron shielding effect of the ITER internal shielding structure. Figure 5 , Figure 6 As shown in the table above, this application maintains excellent neutron shielding performance while optimizing the internal shielding structure, improving engineering simplicity, and reducing the risk of leakage in the vacuum chamber 100, and the shielding capability is slightly higher than that of the ITER internal shielding structure.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this invention.

[0057] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0058] In the description of this invention, "a plurality of" means two or more.

[0059] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0060] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0061] 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.

[0062] 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 vacuum chamber for a nuclear fusion device, characterized in that, include: A vacuum chamber body, the vacuum chamber body comprising: an inner wall and an outer wall, the inner wall and the outer wall being connected and together defining a vacuum chamber interlayer; A shielding structure is disposed within the interlayer of the vacuum chamber; A connection structure is provided within the vacuum chamber interlayer and connected to the vacuum chamber body; the connection structure is configured to fix the shielding structure. The shielding structure includes: multiple shielding plates, which are arranged along the thickness direction of the inner wall; The shielding structure further includes: multiple insulating layers, wherein the insulating layer is provided between each pair of adjacent shielding plates and at the end of the outermost shielding plate facing away from the other shielding plates along the arrangement direction of the multiple shielding plates.

2. The vacuum chamber of the nuclear fusion device according to claim 1, characterized in that, The thickness of the shielding structure is no greater than half the thickness of the vacuum chamber interlayer and is spaced apart from both the inner wall and the outer wall.

3. The vacuum chamber of the nuclear fusion device according to claim 1, characterized in that, Multiple shielding structures are arranged circumferentially along the vacuum chamber and configured as a shielding group, and multiple shielding groups are arranged polarly along the vacuum chamber.

4. The vacuum chamber of the nuclear fusion device according to claim 3, characterized in that, Along the circumference of the vacuum chamber, any two adjacent shielding structures are spaced apart, and along the polar direction of the vacuum chamber, any two adjacent shielding structures are spaced apart.

5. The vacuum chamber of the nuclear fusion device according to claim 1, characterized in that, The connection structure includes a connecting rod and a nut. The connecting rod is connected to the vacuum chamber body and passes through the shielding structure. The nut is sleeved on the connecting rod and threadedly engaged with it. The nut is provided at both ends of the shielding structure.

6. The vacuum chamber of the nuclear fusion device according to claim 5, characterized in that, The shielding structure has a mating hole, and the connecting rod passes through the mating hole. The mating hole extends circumferentially along the vacuum chamber such that the circumferential dimension of the mating hole is larger than the circumferential dimension of the connecting rod.

7. The vacuum chamber of the nuclear fusion device according to claim 5, characterized in that, The connecting rod is connected to both the inner wall and the outer wall.

8. The vacuum chamber of the nuclear fusion device according to claim 5, characterized in that, The vacuum chamber body further includes: a reinforcing rib, which is disposed in the vacuum chamber interlayer and connected to both the inner wall and the outer wall, and the connecting rod is disposed on the reinforcing rib.

9. The vacuum chamber of the nuclear fusion device according to claim 5, characterized in that, The vacuum chamber body further includes: mounting rails, the inner wall and the outer wall facing each other are provided with the mounting rails, and the connecting rods are provided on the mounting rails.

10. A nuclear fusion device, characterized in that, Includes the vacuum chamber of the nuclear fusion device according to any one of claims 1-9.

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