Framework structure of circumferential magnetic field coil and nuclear fusion reaction device

Abstract

The utility model provides a framework structure of an annular magnetic field coil and a nuclear fusion reaction device. The framework structure is D-shaped. The skeleton structure comprises a skeleton main body, and the skeleton main body is provided with an inner ring surface, an outer ring surface and two side surfaces; the two side faces are parallel to each other and are connected with the two sides of the inner ring face and the two sides of the outer ring face respectively. The framework structure further comprises a step part protruding from at least one side face. The skeleton structure of the circumferential magnetic field coil is high in structural strength and low in probability of deformation, it is guaranteed that the working stability of the circumferential magnetic field coil is high, and the nuclear fusion reaction effect can be correspondingly improved.

Description

Technical Field

[0001] This application relates to the field of nuclear fusion technology, and particularly relates to a skeleton structure of a toroidal magnetic field coil and a nuclear fusion reaction device. Background Art

[0002] With the development of nuclear fusion reaction technology, the research on nuclear fusion reaction devices has become more and more extensive.

[0003] A nuclear fusion reaction device includes a reaction chamber for carrying out nuclear fusion reactions, and various coils (such as a central solenoid coil, a poloidal magnetic field coil, and a toroidal magnetic field coil). Plasma is generated in the reaction chamber, and the magnetic field generated by the coils is used to control the plasma so that the plasma is heated to the fusion reaction temperature to undergo a nuclear fusion reaction. The working stability of the coils is crucial for the realization of nuclear fusion reactions.

[0004] At present, the working stability of the toroidal magnetic field coil in a nuclear fusion reaction device still needs to be improved. Utility Model Content

[0005] This application provides a skeleton structure of a toroidal magnetic field coil and a nuclear fusion reaction device. The skeleton structure of the toroidal magnetic field coil has a relatively high structural strength and a low probability of deformation, ensuring a relatively high working stability of the toroidal magnetic field coil, and correspondingly improving the nuclear fusion reaction effect.

[0006] According to one aspect of this application, a skeleton structure of a toroidal magnetic field coil is provided. The skeleton structure is in a D shape;

[0007] The skeleton structure includes a skeleton main body, which has an inner ring surface, an outer ring surface, and two side surfaces; the two side surfaces are parallel to each other and are respectively connected to both sides of the inner ring surface and the outer ring surface;

[0008] The skeleton structure further includes a stepped portion protruding from at least one of the side surfaces.

[0009] According to one aspect of this application, a nuclear fusion reaction device is provided, including: a reaction chamber, a central solenoid coil, a poloidal magnetic field coil, and a toroidal magnetic field coil;

[0010] The toroidal magnetic field coil includes the above-mentioned skeleton structure and a coil winding wound around the skeleton structure.

[0011] In the embodiment of this application, in the skeleton structure of the toroidal magnetic field coil, a stepped portion protrudes from the side surface of the skeleton main body. The existence of this stepped portion can ensure that the thickness of the skeleton structure at the location of the stepped portion is relatively high, correspondingly increasing the strength of the skeleton structure, reducing the probability of deformation of the skeleton structure during the operation of the toroidal magnetic field coil, ensuring a relatively high working stability of the toroidal magnetic field coil, and correspondingly improving the nuclear fusion reaction effect. Brief Description of the Drawings

[0012] Figure 1 FIG. is a schematic structural diagram of a framework structure of a toroidal magnetic field coil provided by an embodiment of the present application;

[0013] Figure 2 FIG. is a schematic structural diagram of another framework structure of a toroidal magnetic field coil provided by an embodiment of the present application;

[0014] Figure 3 FIG. is a schematic structural diagram of a framework main body provided by an embodiment of the present application;

[0015] Figure 4 FIG. is a schematic diagram of still another framework structure of a toroidal magnetic field coil provided by an embodiment of the present application;

[0016] Figure 5 FIG. is a partial schematic structural diagram of a toroidal magnetic field coil provided by an embodiment of the present application. Detailed Description of the Embodiments

[0017] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0018] The terms used in one or more embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit one or more embodiments of the present application. The singular forms "a", "the", and "said" used in one or more embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in one or more embodiments of the present application refers to and includes any or all possible combinations of one or more of the associated listed items. The term "at least one" in one or more embodiments of the present application refers to "one or more", and "a plurality" refers to "two or more". The term "comprising" is an open-ended description and should be understood as "including but not limited to", and other contents may also be included on the basis of the described contents.

[0019] It should be understood that although the terms "first", "second", etc. may be used in one or more embodiments of the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of one or more embodiments of the present application, "first" may also be referred to as "second", and similarly, "second" may also be referred to as "first". Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0020] Nuclear fusion refers to the process in which two lighter atomic nuclei fuse into a heavier atomic nucleus and release energy. A relatively common way of nuclear fusion reaction is that deuterium or tritium undergoes nuclear fusion with each other under certain conditions (such as ultra-high temperature and high pressure), generating a new atomic nucleus with a heavier mass and accompanied by a huge release of energy. Nuclear fusion energy has the characteristics of high energy density, rich raw material reserves, safety, environmental protection and cleanliness, and is an ideal energy source for the future. Accordingly, nuclear fusion reaction devices have been widely studied. For example, the tokamak device is a kind of controllable nuclear fusion reaction device that has been studied more.

[0021] The tokamak nuclear fusion reaction device includes an annular reaction chamber for carrying out nuclear fusion, as well as toroidal field (TF) coils, a center solenoid (CS) coil, a poloidal field (PF) coil, etc. The CS coil is also called the ohmic coil. The current change of the ohmic coil provides the volt-seconds required to generate, establish and maintain the plasma current (which is based on the transformer principle, and volt-second is the unit of magnetic flux). The poloidal magnetic field generated by the poloidal field coil controls the plasma cross-section shape and position balance; the toroidal magnetic field generated by the toroidal field coil ensures the macroscopic overall stability of the plasma; the toroidal magnetic field and the poloidal magnetic field generated by the plasma current together constitute a magnetic field configuration with magnetic field line rotational transformation and magnetic surface structure nesting to confine the plasma. Through this series of controls of the plasma by the magnetic field, the plasma can reach the fusion reaction conditions to undergo nuclear fusion reactions. Since the realization of nuclear fusion reactions depends on the magnetic fields generated by each coil, the structural stability of each coil and the stability of the magnetic fields formed during the working process will directly affect the effect of nuclear fusion reactions.

[0022] The toroidal field coil is usually wound on a coil skeleton with high-temperature superconducting tape. The traditional tokamak device is more similar in shape to a "doughnut". The toroidal field coil is a Princeton "D" type coil with constant tension. This kind of coil is "fat and short", and the arc section has a large turning radius, which increases the amount of superconducting tape used, making the cost of the tokamak device too high and not conducive to large-scale commercial applications. Moreover, it is difficult to ensure the winding tension of the straight section of the "D" type coil. After multiple cold and hot cycles of the non-insulated toroidal field coil, the contact condition of the tape in the straight section deteriorates, which not only easily damages the tape, but also increases the inter-turn resistance due to the looseness of the straight section, thus becoming an insulated coil and reducing the self-protection ability of the non-insulated coil.

[0023] However, because of its compact structure and small aspect ratio, the toroidal field coil of the spherical tokamak is a "tall and thin" "D" type coil, and the arc section has a small turning radius, making the entire spherical tokamak device more compact, reducing the operating cost and enhancing the economic benefits. In this application, an outer arc surface can be added to the straight section in the coil skeleton, so that during the winding process of the high-temperature superconducting tape, the straight section can also maintain a relatively stable tension, ensuring good contact between turns of the non-insulated coil, thereby protecting the tape from being damaged and enhancing the self-protection ability of the non-insulated coil.

[0024] The embodiment of the present application provides a skeleton structure for the toroidal field coil of a spherical tokamak. The strength of this skeleton structure is relatively high, and the probability of deformation is relatively low, which can ensure a relatively high working stability of the toroidal field coil, solve the problem of looseness after multiple cold and hot cycles of the straight section, facilitate the winding of the coil, and ensure the self-protection ability of the coil during subsequent current conduction, and correspondingly can improve the nuclear fusion reaction effect. The embodiment of the present application also relates to a nuclear fusion reaction device, which includes the skeleton structure of the toroidal field coil.

[0025] Figure 1 It is a schematic structural diagram of a skeleton structure of a toroidal field coil provided by an embodiment of the present application. Figure 2 It is a schematic structural diagram of another skeleton structure of a toroidal field coil provided by an embodiment of the present application. Figure 2 What is shown can be Figure 1 The left view of the shown skeleton structure. As Figure 1 and Figure 2 shown, the skeleton structure 10 is in a "D" shape. The skeleton structure 10 includes a skeleton main body 101, and the skeleton main body 101 has an inner ring surface M1, an outer ring surface M2, and two side surfaces (such as the first side surface M3 and the second side surface M4 respectively); the two side surfaces are parallel to each other and are respectively connected to both sides of the inner ring surface M1 and the outer ring surface M2. The inner ring surface M1, the outer ring surface M2, and the two side surfaces are all in a "D" shape.

[0026] The skeleton structure 10 further includes a stepped portion 102 protruding from at least one side. In the embodiment of the present application, only one stepped portion 102 protrudes from the second side M4 as an example. In some embodiments, stepped portions 102 may protrude from both sides, or only the first side M3 may protrude with a stepped portion 102.

[0027] The skeleton structure 10 in the embodiment of the present application is used to provide support for the toroidal magnetic field coil. A coil winding can be arranged on the outer ring surface M2 of the skeleton structure 10, and the arranged coil winding forms a toroidal magnetic field coil. The coil winding can be obtained by winding a conductive material (such as a superconducting tape) along the circumferential direction of the outer ring surface M2. During the process of winding the superconducting tape on the skeleton structure 10, a certain force will be applied to the skeleton structure 10, and during the operation of the toroidal magnetic field coil, certain vibrations will occur, which will also apply a certain force to the skeleton structure. In order to ensure the stability of the toroidal magnetic field coil, it is necessary to ensure that the skeleton structure 10 remains stable even when subjected to a certain degree of force.

[0028] In the embodiment of the present application, the presence of the stepped portion 102 makes the thickness of the skeleton structure 10 at the location of the stepped portion 102 relatively high. Correspondingly, the strength of this part can be relatively high, increasing the overall strength of the skeleton structure and having relatively high overall stability. In this way, during the process of winding the superconducting tape and during the operation of the toroidal magnetic field coil, the probability of the skeleton structure deforming can be reduced, ensuring relatively high working stability of the toroidal magnetic field coil. Correspondingly, the nuclear fusion reaction effect of the nuclear fusion reaction device where the toroidal magnetic field coil is located can be improved. In addition, the stepped portion 102 can also facilitate the fixation of the skeleton structure during the winding process of the high-temperature superconducting tape.

[0029] Please continue to combine Figure 1 and Figure 2 , the stepped portion 102 can be annular and extend along the circumferential direction of the side where it is located. For example, the skeleton structure 10 can include only one stepped portion 102, and this stepped portion 102 is distributed over the entire circumference of the second side M4, and the stepped portion 102 is also in a D shape. The outer ring surface of the stepped portion 102 can be retracted inward by a certain distance relative to the outer ring surface of the skeleton main body 101, the inner ring surface of the stepped portion 102 can be flush with the inner ring surface M1 of the skeleton main body 101, and a step is formed between the outer ring surface of the stepped portion 102 and the part of the side where it is located that is not covered by the stepped portion.

[0030] In some embodiments, the stepped portion 102 may be distributed only in a partial area on the side surface where it is located. For example, the stepped portion 102 is arc-shaped and is located in the arc segment of the side surface where it is located. A plurality of stepped portions 102 may also protrude on one side surface of the skeleton body 101, and there may be a gap between the plurality of stepped portions 102. In some embodiments, the inner ring surface of the stepped portion 102 may not be flush with the inner ring surface M1 of the skeleton body 101. For example, it may extend a certain distance or retract a certain distance relative to the inner ring surface M1 of the skeleton body 101.

[0031] In some embodiments, the width range of the outer ring surface M2 of the skeleton body 101 is 10 mm to 15 mm, that is, the width d1 satisfies 10 mm ≤ d1 ≤ 15 mm, such as d1 = 11 mm. The width of the outer ring surface M2 is wider than the width of the coil winding. The extra width in the outer ring surface M2 can be used as a filling area for the reserved impregnating material. After the coil winding is arranged on the outer ring surface M2, the impregnating material, such as epoxy resin or solder, can be filled in the area outside the coil winding in the outer ring surface M2 to fix the coil winding through the impregnating material, and the impregnating material can also play a role in guiding heat away from the coil winding. When the superconducting tape is wound, it needs the assistance of a winding substrate to ensure that different turns of the superconducting tape are aligned with each other. The extra width in the outer ring surface M2 can be used to arrange the winding substrate during the process of winding the superconducting tape.

[0032] In some embodiments, the height range of the stepped portion 102 is 1 mm to 6 mm, that is, the height d2 satisfies 1 mm ≤ d2 ≤ 6 mm, such as d2 = 5 mm. Exemplarily, when the width of the outer ring surface M2 is 15 mm, the height of the stepped portion 102 can be 1 mm. When the height of the stepped portion 102 is 6 mm, there may be no reserved filling area for the impregnating material on the outer ring surface M2. In the embodiments of the present application, the side surface of the skeleton body 101 is relatively flat. For example, the flatness range of the two side surfaces in the skeleton body 101 is -0.675 to 0.637.

[0033] A tokamak device with an aspect ratio less than or equal to 2 can be called a spherical tokamak device. The skeleton structure 10 of the toroidal field coil provided by the embodiments of the present application can be applied to a spherical tokamak device. The aspect ratio of the spherical tokamak device can be relatively large. For example, the aspect ratio is 1.8, and correspondingly, the aspect ratio of the skeleton structure 10 is also 1.8. The width of the D-shaped skeleton structure 10 in the transverse direction of "D" can be relatively small. In this way, during the winding process of the superconducting tape on the skeleton structure, a larger transition radius can be obtained, the bending degree of the superconducting tape is smaller, and it can be fully protected during the winding process, thereby reducing the damage risk of the obtained toroidal field coil and ensuring the safety of the toroidal field coil during operation.

[0034] If the ring diameter ratio decreases, the skeleton structure 10 will become more pointed and slender, increasing the difficulty of winding the high-temperature superconducting tape. At the same time, the tape in the apex section of the skeleton structure is more likely to be damaged, increasing the engineering difficulty. If the ring diameter ratio increases, the skeleton structure 10 will become thicker and rounder, and the cost of winding the high-temperature superconducting tape and the cost of other supporting facilities will increase exponentially, which is not conducive to the large-scale use of commercial tokamak devices and will reduce economic benefits. Therefore, considering comprehensively, the ring diameter ratio is set to 1.8 to reduce the winding difficulty of the tape, ensure the preparation quality, and reduce the cost.

[0035] The specific shape and size of the skeleton structure 10 can be determined based on its ring diameter ratio. On the basis of ensuring that the ring diameter ratio remains unchanged, the skeleton structure 10 can be enlarged or reduced proportionally to obtain skeleton structures 10 of different sizes to be applicable to different nuclear fusion reaction devices. For example, on the basis of a certain set size, it is scaled by a factor between 0.5 and 4. When scaling, the central angles of the bent parts in the skeleton structure 10 remain unchanged, and only the size is scaled. The following gives an exemplary introduction to the specific shape and size of the skeleton structure 10.

[0036] In some embodiments, the skeleton main body 101 in the skeleton structure 10 can be regarded as formed by sequentially connecting a plurality of skeleton segments end to end. The annular stepped portion 102 can also be regarded as formed by sequentially connecting a plurality of stepped segments end to end. The structures and parameters of each stepped segment can be similar to those of the plurality of skeleton segments, and only the outer ring retracts a certain distance. Figure 3 It is a schematic structural diagram of a skeleton main body provided by an embodiment of the present application. As Figure 3 shown, the skeleton main body 101 includes a skeleton straight segment D1, a first apex segment D2, a skeleton arc segment D3, and a second apex segment D4 that are sequentially connected end to end.

[0037] In the embodiment of the present application, all the surfaces of the skeleton straight segment D1 are not flat. For example, its outer ring surface is an arc surface that slightly protrudes outward, and its inner ring surface is a flat surface. In this way, it can be ensured that during the winding process of the superconducting tape, a stable tension can also be maintained at the skeleton straight end D1, ensuring good contact between the turns of the obtained coil, avoiding the problem of coil looseness caused by multiple thermal and cold cycles of the coil, protecting the tape from being damaged, and improving the self-protection ability of the coil.

[0038] Exemplarily, the radius range of the outer ring surface of the skeleton straight segment D1 is 5352.94 mm to 42823.52 mm, and the central angle of the outer ring surface is 4.96 degrees. For example, the radius of the outer ring surface can be 10705.88 mm, and the central angle of the outer ring surface can be 4.96 degrees. In some embodiments, the length range of the skeleton straight segment D1 is 397.07 mm to 3176.56 mm, and this length can be the length of the inner ring surface of the skeleton straight segment D1. For example, this length is 794.14 mm.

[0039] The first apex segment D2 and the second apex segment D4 can be symmetric about the median line L of the frame body 101, and the parameters of the first apex segment D2 and the second apex segment D4 can be the same. For any one of the first apex segment D2 and the second apex segment D4, the outer ring surface radius range of this apex segment is 21.7 mm to 173.6 mm, the central angle of the outer ring surface is 114.83 degrees, the inner ring surface radius range is 25 mm to 200 mm, and the central angle of the inner ring surface is 124.71 degrees. For example, the outer ring surface radius can be 43.4 mm, the central angle of the outer ring surface can be 114.83 degrees, the inner ring surface radius can be 50 mm, and the central angle of the inner ring surface can be 124.71 degrees.

[0040] The outer ring surface radius range of the frame arc segment D3 is 281.5 mm to 2252 mm, the central angle of the outer ring surface is 125.36 degrees, the inner ring surface radius range is 266.5 mm to 2132 mm, and the central angle of the inner ring surface is 110.59 degrees. For example, the outer ring surface radius can be 563 mm, the central angle of the outer ring surface can be 125.36 degrees, the inner ring surface radius can be 533 mm, and the central angle of the inner ring surface can be 110.59 degrees.

[0041] In the embodiment of the present application, the materials of the stepped portion 102 and the frame body 101 can both be stainless steel, such as 304 stainless steel or 316L stainless steel. The stepped portion 102 and the frame body 101 can be integrally formed. Exemplarily, a ring-shaped material can be processed by cutting or grinding to obtain the frame structure 10.

[0042] In the embodiment of the present application, a plurality of fixing screw holes (not shown in the figure) can also be provided on the frame structure 10, and the plurality of fixing screw holes can be evenly distributed along the circumferential direction of the frame structure 10. Screws can be provided in the fixing screw holes for fixing the winding substrate during the process of winding the superconducting tape, or for fixing to the corresponding bearing structure in the nuclear fusion reaction device after the coil winding is completed.

[0043] Figure 4 is a schematic diagram of another frame structure of the toroidal field coil provided by the embodiment of the present application, Figure 5 is a partial schematic diagram of a toroidal field coil provided by the embodiment of the present application. Please combine Figures 1 to 5 With, in the middle region of the outer ring surface M2 of the frame body 101, a protruding insulating dividing piece 103 can be provided. For example, the material of the insulating dividing piece 103 can be insulating G10 board. The coil windings 20 in the toroidal field coil are respectively arranged on both sides of the insulating dividing piece 103. In the embodiment of the present application, the coil winding 20 can be a double-pancake structure and is obtained by a double-pancake winding method. The two pancakes can be respectively located on both sides of the insulating dividing piece 103. The insulating dividing piece 103 is used to insulate the parts outside the inner-turn coils in the two pancakes to ensure the working stability of the coil winding 20.

[0044] In the embodiments of the present application, the thickness range of the insulating dividing sheet 103 can be from 1 mm to 3 mm. For example, the thickness can be 2 mm. The insulating dividing sheet 103 can be located at the midline position of the outer ring surface M2 of the skeleton main body 101, so that the widths of the outer ring surfaces M2 on both sides of the insulating dividing sheet 103 are the same.

[0045] Such as Figure 5 As shown, in the outer ring surface M2 of the skeleton main body 101, the widths on both sides of the insulating dividing sheet 103 are greater than the width of the coil winding 20. The area outside the coil winding 20 in the outer ring surface M2 can be used to fill the impregnating material.

[0046] In the embodiments of the present application, adding a stepped portion to the skeleton structure of the toroidal field coil can enhance the stability of the skeleton structure. Moreover, the toroidal ratio of the skeleton structure is relatively large, which can ensure that the superconducting tape is not easily damaged, is beneficial to the operation stability of the toroidal field coil, and correspondingly ensures the stable realization of the nuclear fusion reaction.

[0047] In summary, in the skeleton structure of the toroidal field coil provided by the embodiments of the present application, a stepped portion protrudes from the side surface of the skeleton main body. The existence of the stepped portion can ensure that the thickness of the skeleton structure at the location of the stepped portion is relatively high, correspondingly increasing the strength of the skeleton structure, reducing the probability of deformation of the skeleton structure during the operation of the toroidal field coil, ensuring a relatively high working stability of the toroidal field coil, and correspondingly improving the effect of the nuclear fusion reaction.

[0048] The embodiments of the present application also provide a nuclear fusion reaction device, which includes: a reaction chamber, a central solenoid coil, a poloidal field coil, and a toroidal field coil. The toroidal field coil includes the Figures 1 to 5 skeleton structure 10 shown in any one of the figures, and a coil winding wound around the skeleton structure 10. The number of toroidal field coils in the nuclear fusion reaction device can be multiple, and the multiple toroidal field coils respectively surround the reaction chamber along the circumferential direction of the reaction chamber.

[0049] Due to the relatively high strength of the skeleton structure 10 and the relatively large toroidal ratio, based on the skeleton structure 10, the working stability of the toroidal field coil can be ensured, and correspondingly, the effect of the nuclear fusion reaction device in realizing the nuclear fusion reaction is better.

[0050] The above describes specific embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve the desired results. Additionally, the processes depicted in the figures do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0051] Those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application. In the above embodiments, each embodiment is described with emphasis. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0052] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The optional embodiments do not elaborate on all details and do not limit the present application to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of the present application. These embodiments are selected and specifically described to better explain the principle and practical application of the present application, so that those skilled in the art can well understand and utilize the present application.

Claims

1. A skeleton structure of a toroidal magnetic field coil, characterized in that The skeleton structure is D-shaped; The skeleton structure includes a skeleton main body, which has an inner ring surface, an outer ring surface and two side surfaces; the two side surfaces are parallel to each other and are respectively connected to both sides of the inner ring surface and the outer ring surface; The skeleton structure further includes a stepped portion protruding from at least one of the side surfaces.

2. The framework structure according to claim 1, characterized in that The stepped portion is annular and extends circumferentially along the side surface.

3. The skeleton structure according to claim 2, wherein, The inner ring surface of the annular stepped portion is flush with the inner ring surface of the skeleton main body.

4. The skeleton structure according to any one of claims 1 to 3, characterized in that, An insulating dividing piece protrudes in the middle area of the outer ring surface of the skeleton main body, and the coil windings in the toroidal magnetic field coil are respectively arranged on both sides of the insulating dividing piece.

5. The framework structure according to claim 4, wherein The widths of both sides of the insulating dividing piece in the outer ring surface of the skeleton main body are greater than the width of the coil winding.

6. The skeletal structure according to any one of claims 1 to 3, characterized in that, The aspect ratio of the ring diameter of the skeleton structure is 1.

8.

7. The framework structure according to any one of claims 1 to 3, characterized in that, The skeleton main body includes a skeleton straight section, a first vertex section, a skeleton arc section and a second vertex section that are connected end to end in sequence; The radius range of the outer ring surface of the skeleton straight section is 5352.94 mm to 42823.52 mm, the central angle of the outer ring surface is 4.96 degrees, and the inner ring surface of the skeleton straight section is a plane; And / or, for any one of the first vertex section and the second vertex section, the radius range of the outer ring surface of the vertex section is 21.7 mm to 173.6 mm, the central angle of the outer ring surface is 114.83 degrees, the radius range of the inner ring surface is 25 mm to 200 mm, and the central angle of the inner ring surface is 124.71 degrees; And / or, the radius range of the outer ring surface of the skeleton arc section is 281.5 mm to 2252 mm, the central angle of the outer ring surface is 125.36 degrees, the radius range of the inner ring surface is 266.5 mm to 2132 mm, and the central angle of the inner ring surface is 110.59 degrees.

8. The framework structure according to claim 7, characterized in that, The length range of the skeleton straight section is 397.07 mm to 3176.56 mm.

9. The skeletal structure according to any one of claims 1 to 3, characterized in that, The width range of the outer ring surface is 10 mm to 15 mm; And / or, the height range of the stepped portion is 1 mm to 6 mm; And / or, the flatness range of the two side surfaces is -0.675 to 0.

637.

10. A nuclear fusion reaction device, characterized in that, Including: A reaction chamber, a central solenoid coil, a poloidal magnetic field coil and a toroidal magnetic field coil; The toroidal magnetic field coil includes the skeleton structure according to any one of claims 1 to 9, and a coil winding wound on the skeleton structure.

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