Support mechanism for superconducting joints in nuclear fusion vacuum vessels and method of installation

Abstract

The application belongs to the technical field of nuclear fusion device installation, and discloses a support mechanism for superconducting joints in a nuclear fusion vacuum cavity and an installation method. In the support mechanism, the front clamping plate and the rear clamping plate are connected in front and back and connected by clamping plate bolts, and clamp two vertically extending superconducting joints in the vacuum cavity; the front side of the front clamping plate is provided with two low-temperature superconducting magnets connected with the two superconducting joints; an insulating and heat-insulating plate is arranged around the surface of each superconducting joint and between each superconducting joint and the front clamping plate and the rear clamping plate; there are two wire rope units, each of which is located at the rear side of the rear clamping plate, and each wire rope unit passes through a lower cold shield and is pre-tightened and connected between the rear clamping plate and the lower cylinder of the vacuum cavity. The application is suitable for installation in a narrow installation space in a nuclear fusion vacuum cavity, can effectively ensure the position accuracy of the superconducting joints, avoid damage to the outer insulation part of the superconducting joints, and has small heat leakage.

Description

Technical Field

[0001] This invention relates to the field of nuclear fusion device installation technology, and in particular to a support mechanism and installation method for a superconducting joint in a nuclear fusion vacuum chamber. Background Technology

[0002] The current lead (hereinafter referred to as the current lead) inside the vacuum chamber of nuclear fusion is a crucial component of nuclear fusion, serving as a key link between the room-temperature power source and the cryogenic superconducting magnet. The superconducting connector is formed by overlapping the connectors of the current lead and the cryogenic superconducting magnet, and then wrapping them with an outer insulating layer. The installation and fixation of the superconducting connector within the vacuum chamber has a significant impact on the overall conductivity and safety; its installation support structure and installation method have a crucial influence on the superconducting connector.

[0003] Due to the large overall size of the current leads ( The superconducting joint (1×4m) has specific requirements regarding the magnitude and direction of forces acting on it. The installation space is limited, and the support structure must have minimal thermal leakage. Furthermore, the superconducting joint experiences Lorentz forces and thermal contraction during cryogenic operation, which can affect its positional accuracy. Therefore, ensuring the positional accuracy meets requirements is crucial. Consequently, higher demands are placed on the design and installation of the support structure to ensure the superconducting joint's position meets deviation requirements, that the outer insulation layer remains undamaged during installation and operation, and that the support structure has minimal thermal leakage.

[0004] Conventional support mechanisms typically employ a fixed structure with bolted connections. While simple to install and requiring ample installation space, they are functionally limited, lack pre-tightening capabilities, and exhibit high thermal conductivity and leakage, posing a risk of damage to the outer insulation of the superconducting connector within the vacuum chamber of a nuclear fusion device. Conventional support mechanisms are ill-suited to meet the installation and securing requirements of the superconducting connector within the vacuum chamber of a nuclear fusion device.

[0005] A new design approach and installation method are urgently needed to solve the installation problem of superconducting joints inside the vacuum chamber of nuclear fusion devices. Summary of the Invention

[0006] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this invention is to provide a support mechanism for a superconducting connector within a nuclear fusion vacuum chamber. This mechanism has a simple structure, is suitable for installation in the confined space of a nuclear fusion vacuum chamber, effectively ensures the positional accuracy of the superconducting connector, avoids damage to the outer insulation layer of the superconducting connector, and minimizes heat leakage.

[0007] A support mechanism for a superconducting connector within a nuclear fusion vacuum chamber, according to a first aspect embodiment of the present invention, is disposed within the vacuum chamber and includes:

[0008] The clamping unit includes a front clamping plate, a rear clamping plate, and clamping bolts. The front clamping plate and the rear clamping plate are fitted together and connected by the clamping bolts to clamp two vertically extending superconducting connectors located in the vacuum cavity. Two low-temperature superconducting magnets connected to the two superconducting connectors are arranged on the front side of the front clamping plate.

[0009] An insulating heat insulation board is disposed around the surface of each superconducting joint and located between each superconducting joint and the front clamping plate and the rear clamping plate;

[0010] There are two metal wire rope units. Each metal wire rope unit is located at both ends of the rear side of the rear clamping plate. Each metal wire rope unit passes through the lower cooling screen in the vacuum chamber and is pre-tightly connected between the rear clamping plate and the lower cylinder of the vacuum chamber.

[0011] In the first aspect of the present invention, the support mechanism for a superconducting connector within a nuclear fusion vacuum chamber is installed by pre-installing the front clamping plate and the rear clamping plate onto the two superconducting connectors, and pre-installing the clamping plate bolts; the insulating heat-insulating plate is installed between the superconducting connector and the front and rear clamping plates, and the clamping plate bolts are tightened; the metal wire rope unit is passed through the lower cooling screen within the vacuum chamber and pre-tightly connected between the rear clamping plate and the lower cylinder of the vacuum chamber. Therefore, the support mechanism for a superconducting connector within a nuclear fusion vacuum chamber according to the first aspect of the present invention can be installed in the confined installation space within the fusion vacuum chamber, and is easy to operate.

[0012] The support mechanism for a superconducting connector in a nuclear fusion vacuum cavity according to a first aspect embodiment of the present invention has the following advantages: First, by setting the clamping plate unit and the pre-tightened metal wire rope unit, the superconducting connector can be effectively kept within the required positional deviation range. Second, by setting the insulating heat insulation plate between the clamping plate unit and the superconducting connector, the superconducting connector can be effectively insulated from the clamping plate unit, while avoiding damage to the outer insulating part of the superconducting connector during the installation and fixing of the clamping plate unit, thereby effectively preventing leakage of the low-temperature superconducting magnet and ensuring high operational safety. Third, by setting the insulating heat insulation plate and the metal wire rope unit, the heat leakage of the support mechanism is small. Fourth, it is suitable for installation in the narrow installation space of a nuclear fusion vacuum cavity and is easy to operate. Fifth, the overall layout of the support mechanism is reasonable and the overall structural stability is strong.

[0013] In some embodiments, the front clamping plate has front concave cavities at both ends, and the rear clamping plate has rear concave cavities at both ends; the front concave cavities of the front clamping plate and the rear concave cavities of the rear clamping plate are correspondingly matched to form a surrounding cavity to accommodate the superconducting connector and the insulating heat insulation plate.

[0014] In some embodiments, the inner wall surfaces of the front cavity and the rear cavity are respectively provided with limiting blocks for limiting and supporting the insulating heat insulation board.

[0015] In some embodiments, the front clamp and the rear clamp are made of stainless steel plates welded together.

[0016] In some embodiments, the insulating heat insulation board has grooves on both sides.

[0017] In some embodiments, the insulating heat insulation board is an epoxy board.

[0018] In some embodiments, the wire rope unit includes a wire rope, a connecting plate, a fixing plate, and a pre-tightening bolt; the wire rope is connected to the end of the rear clamping plate and the connecting plate respectively; the connecting plate is threadedly fixed to the fixing plate by the pre-tightening bolt, the fixing plate is welded to the inner wall surface of the lower cylinder, and the pre-tightening force of the wire rope is adjusted by the pre-tightening bolt.

[0019] In some embodiments, the wire rope unit further includes an insulating pad disposed between the connecting plate and the fixing plate.

[0020] In some embodiments, the metal wire rope is a steel wire rope, and the preload of the steel wire rope satisfies the calculated value.

[0021] In some embodiments, the setting angle of the wire rope is determined by analysis, calculation and experimental verification based on the direction of cold contraction and Lorentz force of the superconducting joint during low-temperature electrified operation.

[0022] In some embodiments, the end reinforcing rib of the rear clamp is provided with a vertically extending connecting bolt, one end of the wire rope is sleeved on the connecting bolt and locked by a first lock; the other end of the wire rope passes through the lug of the connecting plate and is locked by a second lock.

[0023] A second aspect of the present invention also provides a method for installing a support mechanism for a superconducting joint inside a nuclear fusion vacuum cavity, wherein the support mechanism for the superconducting joint inside a nuclear fusion vacuum cavity is the same as the support mechanism for the superconducting joint inside a nuclear fusion vacuum cavity according to the first aspect of the present invention, and the installation method includes the following steps:

[0024] The front clamp and the rear clamp are pre-installed in the middle position of the two superconducting joints, and the clamp bolts are pre-installed.

[0025] Install the insulating heat insulation board between the superconducting joint, the front clamping plate, and the rear clamping plate, and tighten the clamping plate bolts;

[0026] The metal wire rope units are passed through the lower cooling screen inside the vacuum chamber and pre-tightened between the rear clamping plate and the lower cylinder of the vacuum chamber.

[0027] The installation method of the support mechanism for the superconducting connector in the nuclear fusion vacuum cavity according to the second aspect of the present invention can be installed in the narrow installation space in the vacuum cavity. The installation operation is convenient. The installed support mechanism for the superconducting connector in the nuclear fusion vacuum cavity has basically the same technical effect as the support mechanism for the superconducting connector in the nuclear fusion vacuum cavity according to the first aspect of the present invention, and will not be described again here.

[0028] 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

[0029] Figure 1 This is a schematic diagram illustrating an application scenario of the support mechanism for a superconducting connector within a nuclear fusion vacuum cavity, according to an embodiment of the present invention.

[0030] Figure 2 This is a schematic diagram of the orientation of a support mechanism for a superconducting connector in a nuclear fusion vacuum cavity, according to an embodiment of the present invention, which supports and fixes the superconducting connector.

[0031] Figure 3 This is another schematic diagram of the support mechanism for the superconducting connector in the vacuum cavity of nuclear fusion according to an embodiment of the present invention, showing how the superconducting connector is supported and fixed.

[0032] Figure 4 This is a schematic diagram of the support mechanism for a superconducting connector inside a nuclear fusion vacuum cavity according to an embodiment of the present invention;

[0033] Figure 5 This is a cross-sectional schematic diagram of a support mechanism for a superconducting connector in a nuclear fusion vacuum cavity according to an embodiment of the present invention.

[0034] Figure 6 yes Figure 3 Enlarged diagram of point A in the middle.

[0035] Figure Labels

[0036] Support mechanism 1000; clamping plate unit 1; front clamping plate 101; rear clamping plate 102; connecting bolt 1021; clamping plate bolt 103; insulating heat insulation board 2; metal wire rope unit 3; metal wire rope 301; connecting plate 302; lug 3021; ​​fixing plate 303; pre-tightening bolt 304; heat insulation gasket 305; first lock 306; second lock 307; superconducting connector 2000; current lead 3000; vacuum chamber top plate 4000; low temperature superconducting magnet 5000; lower cylinder 6000. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below, examples of which are illustrated 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 intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] The following is combined Figures 1 to 6 This invention describes a support mechanism 1000 and its installation method for a superconducting connector 2000 inside a nuclear fusion vacuum chamber, according to an embodiment of the present invention.

[0039] like Figures 1 to 3 As shown, in the first aspect embodiment of the present invention, a support mechanism 1000 for a superconducting connector 2000 inside a nuclear fusion vacuum chamber is disposed inside the vacuum chamber and connected to two superconducting connectors 2000 in the cold screen inside the vacuum chamber, for supporting and fixing the two superconducting connectors 2000; the upper ends of the two superconducting connectors 2000 are respectively connected to the lower ends of two current leads 3000, the two current leads 3000 are mounted on the top plate 4000 of the vacuum chamber, the upper ends of the two current leads 3000 are connected to a room temperature power supply and their lower ends are located in the cold screen inside the vacuum chamber.

[0040] like Figures 1 to 6 As shown, the support mechanism 1000 for a superconducting connector 2000 in a nuclear fusion vacuum cavity according to the first aspect embodiment of the present invention includes a clamping plate unit 1, an insulating heat insulation plate 2, and a metal wire rope unit 3.

[0041] The clamping unit 1 includes a front clamping plate 101, a rear clamping plate 102, and clamping bolts 103. The front clamping plate 101 and the rear clamping plate 102 are fitted together and connected by the clamping bolts 103 to clamp two vertically extending superconducting connectors 2000 located in the vacuum cavity, for example, clamping them at the vertical middle part of the superconducting connectors 2000. Two cryogenic superconducting magnets 5000 connected to the two superconducting connectors 2000 are arranged on the front side of the front clamping plate 101. Since the two superconducting connectors 2000 generate a Lorentz force that repels each other when the two superconducting connectors 2000 are operating under cryogenic charge, for example, if the two superconducting connectors 2000 are arranged side by side, they will generate a Lorentz force that repels each other in the left and right direction. Therefore, by clamping the two superconducting connectors 2000 simultaneously by the clamping unit 1, it is possible to prevent the two superconducting connectors 2000 from moving away from each other due to the Lorentz force, which is beneficial to ensuring that the positional accuracy of the superconducting connectors 2000 meets the requirements. Meanwhile, the front clamping plate 101 and the rear clamping plate 102 are fitted together and connected by clamping plate bolts 103, which allows for convenient operation in the narrow installation space inside the vacuum chamber and high installation efficiency.

[0042] An insulating heat insulation plate 2 is disposed around the surface of each superconducting joint 2000 and located between each superconducting joint 2000 and the front clamping plate 101 and the rear clamping plate 102. By setting the insulating heat insulation plate 2, on the one hand, the superconducting joint 2000 can be effectively insulated from the clamping plate unit 1, and damage to the outer insulating part of the superconducting joint 2000 can be avoided during the installation and fixing of the clamping plate unit 1, thereby effectively preventing leakage of the cryogenic superconducting magnet 5000 and ensuring high operational safety. On the other hand, it can isolate the heat transfer between the cryogenic superconducting magnet 5000 and the clamping plate unit 1, resulting in minimal heat leakage of the support mechanism 1000. In summary, the insulating heat insulation plate 2 can protect the outer insulating part of the superconducting joint 2000 from damage, while reducing heat conduction and ensuring minimal heat leakage of the support mechanism 1000.

[0043] There are two metal wire rope units 3, each located at both ends of the rear side of the rear clamping plate 102. Each metal wire rope unit 3 passes through the lower cooling screen inside the vacuum chamber and is pre-tightly connected between the rear clamping plate 102 and the lower cylinder 6000 of the vacuum chamber. Since two cryogenic superconducting magnets 5000 connected to the two superconducting joints 2000 are arranged on the front side of the front clamping plate 101, to prevent the superconducting joints 2000 from undergoing cold contraction deformation due to temperature drop during cryogenic charging operation from room temperature, which could lead to substandard positioning accuracy, the metal wire rope units 3 are pre-tightly connected between the rear clamping plate 102 and the lower cylinder 6000 of the vacuum chamber. The pre-tightening force of the metal wire rope units 3 effectively limits the forward movement of the superconducting joints 2000 during cold contraction deformation, ensuring that the superconducting joints 2000 remain within the required positional deviation range during cold contraction deformation. Furthermore, the smaller cross-section of the metal wire rope units 3 reduces heat leakage from the support mechanism 1000. In addition, by passing the metal wire rope unit 3 through the lower cooling screen inside the vacuum chamber and pre-tightly connecting it between the rear clamping plate 102 and the lower cylinder 6000 of the vacuum chamber, it is convenient to operate in the narrow installation space inside the vacuum chamber.

[0044] During installation of the support mechanism 1000 for a superconducting connector 2000 within a nuclear fusion vacuum chamber according to the first aspect of the present invention, the front clamping plate 101 and the rear clamping plate 102 are pre-installed at the middle position of the two superconducting connectors 2000, and clamping plate bolts 103 are pre-installed; an insulating heat-insulating plate 2 is installed between the superconducting connector 2000 and the front clamping plate 101 and the rear clamping plate 102, and the clamping plate bolts 103 are tightened; the metal wire rope unit 3 is passed through the lower cooling screen within the vacuum chamber and pre-tightly connected between the rear clamping plate 102 and the lower cylinder 6000 of the vacuum chamber. Therefore, the support mechanism 1000 for a superconducting connector 2000 within a nuclear fusion vacuum chamber according to the first aspect of the present invention can be installed in the confined installation space within the fusion vacuum chamber, and is easy to operate.

[0045] The support mechanism 1000 for a superconducting connector 2000 inside a nuclear fusion vacuum cavity according to the first aspect of the present invention has the following advantages: First, by setting up the clamping plate unit 1 and the pre-tightened metal wire rope unit 3, it can effectively ensure that the superconducting connector 2000 remains within its required positional deviation range during cryogenic electrification operation; second, by setting up an insulating heat-insulating plate 2 between the clamping plate unit 1 and the superconducting connector 2000, it can effectively insulate the superconducting connector 2000 from the clamping plate unit 1, while avoiding damage to the outer insulating part of the superconducting connector 2000 during the installation and fixing of the clamping plate unit 1, thereby effectively preventing leakage of the cryogenic superconducting magnet 5000 and ensuring high operational safety; third, by setting up the insulating heat-insulating plate 2 and the metal wire rope unit 3, the heat leakage of the support mechanism 1000 is small; fourth, it is suitable for installation in the narrow installation space inside the nuclear fusion vacuum cavity and is easy to operate; fifth, the overall layout of the support mechanism 1000 is reasonable and the overall structural stability is strong.

[0046] In some embodiments, the front clamping plate 101 has front recesses at both ends, and the rear clamping plate 102 has rear recesses at both ends; the front recesses of the front clamping plate 101 and the rear recesses of the rear clamping plate 102 cooperate to form a surrounding cavity to accommodate the superconducting connector 2000 and the insulating heat insulation plate 2. This makes installation more convenient and efficient, and effectively prevents the two superconducting connectors 2000 from moving away from each other due to Lorentz force, thus better ensuring that the positional accuracy of the superconducting connector 2000 meets the requirements.

[0047] In some embodiments, limiting blocks for limiting and supporting the insulating heat insulation plate 2 are respectively provided on the inner wall surfaces of the front cavity and the rear cavity. By providing limiting blocks, the insulating heat insulation plate 2 can be conveniently installed between the front clamping plate 101 and the rear clamping plate 102 after the front clamping plate 101 and the rear clamping plate 102 are pre-installed on the two superconducting connectors 2000, thus serving to limit and support the insulating heat insulation plate 2. The installation operation is convenient and efficient.

[0048] Specifically, during the installation of clamping unit 1, the front clamping plate 101 and the rear clamping plate 102 are pre-installed in the vertical middle part of the superconducting connector 2000, and clamping bolts 103 are pre-installed. Then, the insulating heat insulation plate 2 is installed between the outer insulating part of the superconducting connector 2000 and the front clamping plate 101 and the rear clamping plate 102. Finally, the position of the insulating heat insulation plate 2 is adjusted and the clamping bolts 103 are tightened to ensure that the front clamping plate 101, the rear clamping plate 102, and the insulating heat insulation plate 2 are firmly installed on the superconducting connector 2000. This makes the installation operation convenient and efficient.

[0049] In some embodiments, the front clamping plate 101 and the rear clamping plate 102 are made of stainless steel plates by welding, which is convenient to process and has good structural strength, and the structure is stable and reliable. The front clamping plate 101 and the rear clamping plate 102 are also welded with reinforcing ribs, which further enhances the structural strength of the front clamping plate 101 and the rear clamping plate 102, making the structure more stable and reliable.

[0050] In some embodiments, grooves (not shown) are formed on both sides of the insulating heat insulation plate 2. This reduces the contact area and further reduces heat leakage of the support mechanism 1000.

[0051] In some embodiments, the insulating board 2 is an epoxy board. Epoxy boards have high strength and good insulation performance, meeting the usage requirements. The insulating board 2 can also be made of other materials with high strength and good insulation performance.

[0052] In some embodiments, the wire rope unit 3 includes a wire rope 301, a connecting plate 302, a fixing plate 303, and a preload bolt 304. The wire rope 301 is connected to the end of the rear clamping plate 102 and the connecting plate 302, respectively. The connecting plate 302 is threadedly fixed to the fixing plate 303 by the preload bolt 304. The fixing plate 303 is welded to the inner wall of the lower cylinder 6000. The preload of the wire rope 301 is adjusted by the preload bolt 304. The wire rope 301 has good strength and can meet the usage requirements. At the same time, the cross-sectional area of ​​the wire rope 301 is small, which can reduce heat leakage of the support mechanism 1000.

[0053] During installation, one end of the metal wire rope 301 is connected to the end of the rear clamping plate 102, and the metal wire rope 301 is passed through the lower cooling screen. The other end of the metal wire rope 301 is connected to the connecting plate 302. The connecting plate 302 is fixed to the fixing plate 303 using a pre-tightening bolt 304, and the pre-tightening force applied to the metal wire rope 301 is adjusted by adjusting the pre-tightening bolt 304. During installation, if the installation positions of the rear clamping plate 102 and the front clamping plate 101 on the superconducting connector 2000 differ, the connection position of the metal wire rope 301 and the rear clamping plate 102 can be adjusted accordingly. Therefore, the connection of the wire rope is very convenient, and the metal wire rope unit 3 can be installed in the confined space of the vacuum chamber, making installation easy.

[0054] In some embodiments, there are four preload bolts 304, which are arranged in a rectangular pattern on the connecting plate 302, which is beneficial for the connecting plate 302 to be subjected to balanced forces.

[0055] In some embodiments, the wire rope unit 3 further includes an insulating pad 305 disposed between the connecting plate 302 and the fixing plate 303. The insulating pad 305 is used to reduce heat conduction, which can further effectively reduce heat leakage of the support mechanism 1000.

[0056] In some embodiments, the metal wire rope 301 is a steel wire rope, which has good strength, small cross-sectional area, and low heat leakage. The preload of the steel wire rope meets the calculated value. Specifically, the preload of the steel wire rope is adjusted by a torque wrench to meet the calculated value. The type of steel wire rope is determined according to the analysis and calculation, and the torque of the preload bolt 304 is determined through analysis, calculation, and experimental results. This helps ensure that the position of the superconducting connector 2000 is always within the required deviation range.

[0057] In some embodiments, the setting angle of the wire rope is determined by analysis, calculation and experimental verification based on the direction of cold contraction and Lorentz force of the superconducting joint 2000 during low-temperature energized operation, so as to ensure that the position of the superconducting joint 2000 is always within the required deviation range.

[0058] In some embodiments, the end reinforcing rib of the rear clamping plate 102 is provided with a vertically extending connecting bolt 1021. One end of the wire rope is sleeved on the connecting bolt 1021 and locked by the first locking buckle 306; the other end of the wire rope passes through the lug 3021 of the connecting plate 302 and is locked by the second locking buckle 307. Thus, the connection structure between the wire rope and the rear clamping plate 102 and the connecting plate 302 is simple and convenient.

[0059] It should be noted that during the installation of the wire rope, the connection position between the wire rope and the connecting bolt 1021 can be adjusted accordingly depending on the different installation positions of the rear clamp 102 and the front clamp 101 on the superconducting connector 2000, especially the different installation positions in the vertical direction of the superconducting connector 2000. This makes the connection of the wire rope very convenient.

[0060] A second aspect of the present invention also provides a method for installing a support mechanism 1000 for a superconducting connector 2000 inside a nuclear fusion vacuum cavity. The support mechanism 1000 for the superconducting connector 2000 inside a nuclear fusion vacuum cavity is the same as the support mechanism 1000 for the superconducting connector 2000 inside a nuclear fusion vacuum cavity according to the first aspect of the present invention. The installation method includes the following steps:

[0061] The front clamping plate 101 and the rear clamping plate 102 are pre-installed in the middle position of the two superconducting joints 2000, and the clamping plate bolts 103 are pre-installed.

[0062] Install the insulating heat insulation board 2 between the superconducting joint 2000, the front clamping plate 101 and the rear clamping plate 102 and tighten the clamping plate bolts 103;

[0063] The metal wire rope unit 3 is passed through the lower cooling screen inside the vacuum chamber and pre-tightened between the rear clamping plate 102 and the lower cylinder 6000 of the vacuum chamber.

[0064] The installation method of the support mechanism 1000 for the superconducting connector 2000 in the nuclear fusion vacuum cavity according to the second aspect embodiment of the present invention can be installed in the narrow installation space in the vacuum cavity, and the installation operation is convenient. The installed support mechanism 1000 for the superconducting connector 2000 in the nuclear fusion vacuum cavity has basically the same technical effect as the support mechanism 1000 for the superconducting connector 2000 in the nuclear fusion vacuum cavity according to the first aspect embodiment of the present invention, and will not be described again here.

[0065] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A support mechanism for a superconducting connector inside a nuclear fusion vacuum chamber, characterized in that, Set within a vacuum chamber, including: The clamping unit includes a front clamping plate, a rear clamping plate, and clamping bolts. The front clamping plate and the rear clamping plate are fitted together and connected by the clamping bolts to clamp two vertically extending superconducting connectors located in the vacuum cavity. The superconducting connectors are superconducting connectors at the lower ends of current leads in the nuclear fusion vacuum cavity. Two low-temperature superconducting magnets connected to the two superconducting connectors are arranged on the front side of the front clamping plate. An insulating heat insulation board is disposed around the surface of each superconducting joint and located between each superconducting joint and the front clamping plate and the rear clamping plate; There are two metal wire rope units. Each metal wire rope unit is located at both ends of the rear side of the rear clamping plate. Each metal wire rope unit passes through the lower cooling screen in the vacuum chamber and is pre-tightly connected between the rear clamping plate and the lower cylinder of the vacuum chamber.

2. The support mechanism for a superconducting joint in a nuclear fusion vacuum cavity according to claim 1, characterized in that, The front clamping plate has front concave cavities at both ends, and the rear clamping plate has rear concave cavities at both ends; the front concave cavities of the front clamping plate and the rear concave cavities of the rear clamping plate cooperate to form a surrounding cavity to accommodate the superconducting connector and the insulating heat insulation plate.

3. The support mechanism for a superconducting joint in a nuclear fusion vacuum cavity according to claim 2, characterized in that, The inner walls of the front cavity and the rear cavity are respectively provided with limiting blocks for limiting and supporting the insulating heat insulation board.

4. The support mechanism for a superconducting connector in a nuclear fusion vacuum cavity according to claim 1, characterized in that, The front clamping plate and the rear clamping plate are made of stainless steel plates welded together.

5. The support mechanism for a superconducting joint in a nuclear fusion vacuum cavity according to claim 1, characterized in that, The insulating heat insulation board has grooves on both sides.

6. The support mechanism for a superconducting joint in a nuclear fusion vacuum cavity according to claim 1, characterized in that, The insulating heat insulation board is an epoxy board.

7. The support mechanism for a superconducting joint in a nuclear fusion vacuum cavity according to claim 1, characterized in that, The metal wire rope unit includes a metal wire rope, a connecting plate, a fixing plate, and a pre-tightening bolt; the metal wire rope is connected to the end of the rear clamping plate and the connecting plate respectively; the connecting plate is threadedly fixed to the fixing plate by the pre-tightening bolt, the fixing plate is welded to the inner wall of the lower cylinder, and the pre-tightening force of the metal wire rope is adjusted by the pre-tightening bolt.

8. The support mechanism for a superconducting joint in a nuclear fusion vacuum cavity according to claim 7, characterized in that, The metal wire rope unit also includes an insulating pad, which is disposed between the connecting plate and the fixing plate.

9. The support mechanism for a superconducting joint in a nuclear fusion vacuum cavity according to claim 7, characterized in that, The metal wire rope is a steel wire rope, and the preload of the steel wire rope meets the calculated value.

10. The support mechanism for a superconducting joint in a nuclear fusion vacuum cavity according to claim 9, characterized in that, The setting angle of the steel wire rope is determined through analysis, calculation and experimental verification based on the direction of cold contraction and Lorentz force of the superconducting joint during low-temperature electrified operation.

11. The support mechanism for a superconducting joint in a nuclear fusion vacuum cavity according to claim 9, characterized in that, The end reinforcing rib of the rear clamp is provided with a vertically extending connecting bolt. One end of the wire rope is sleeved on the connecting bolt and locked by the first lock; the other end of the wire rope passes through the lug of the connecting plate and is locked by the second lock.

12. A method for installing a support mechanism for a superconducting joint in a nuclear fusion vacuum cavity as described in any one of claims 1-11, characterized in that, Includes the following steps: The front clamp and the rear clamp are pre-installed in the middle position of the two superconducting joints, and the clamp bolts are pre-installed. Install the insulating heat insulation board between the superconducting joint, the front clamping plate, and the rear clamping plate, and tighten the clamping plate bolts; The metal wire rope units are passed through the lower cooling screen inside the vacuum chamber and pre-tightened between the rear clamping plate and the lower cylinder of the vacuum chamber.

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