Multi-point thermal cut-off support structure for cold shield of star simulator and star simulator

Abstract

The utility model discloses a kind of star imitating device cold screen multi-point hot cut-off support structure and star imitating device, comprising: dewar, cold screen and support assembly, the inside of dewar is formed with chamber, cold screen is set in chamber, and including multiple cold screen plates of mutual splicing fixed, each cold screen plate is oppositely spaced apart with the wall of dewar, part or all cold screen plates in multiple cold screen plates are respectively provided with support assembly between the wall of dewar, support assembly includes rigid support component and flexible support component, rigid support component is set between the center portion of cold screen plate and the corresponding part of the wall of dewar, flexible support component is set between the outer edge area of cold screen plate and the corresponding part of the wall of dewar, flexible support component can offset the deformation of overall support structure by self deformation, so that the support structure of this star imitating device cold screen can solve the problem of lower deformation resistance of existing support structure.

Description

Technical Field

[0001] This utility model relates to the technical field of support structure for nuclear fusion devices, specifically to a stellarator cold screen multi-point thermal cutoff support structure, and this stellarator cold screen multi-point thermal cutoff support structure can be applied to stellarators. Background Technology

[0002] Stellarators and tokamaks, as the mainstream magnetic confinement fusion devices, both contain two key components: the Dewar and the cold shield. The Dewar provides a sealed vacuum environment for the device's cryogenic operation, isolating it from the convective heat transfer effects of the external environment. The cold shield, located inside the Dewar, blocks external thermal radiation and reduces heat transfer to the cryogenic superconducting components and the vacuum region. It is an important structure for ensuring the cryogenic operation of the fusion device and maintaining its operational accuracy. The supporting structure between the cold shield and the Dewar not only bears the overall load of the cold shield but also needs to ensure good thermal insulation performance and deformation adaptability.

[0003] Currently, the support structure connecting the cold shield and the Dewar mostly uses fiberglass epoxy resin support columns as the core load-bearing and thermal insulation connector. The conventional assembly method is as follows: uniformly open assembly through holes around the circumference of the cold shield wall, fix one end of the fiberglass epoxy resin rigid support column to the Dewar side base, and insert the other end into the opening of the cold shield. In order to accommodate the deformation of the cold shield, the existing technology sets the diameter of the cold shield assembly hole to a clearance fit slightly larger than the outer diameter of the support column, passively compensating for the thermal expansion and contraction displacement of the cold shield. This clearance fit displacement compensation method results in the cold shield having no precise positioning constraint relative to the Dewar, and the cold shield is very easy to move within the hole-axis clearance range, which seriously affects the assembly accuracy and structural stability of the cold shield.

[0004] In addition, most existing cold screen support mechanisms adopt a purely rigid support structure, which only offsets the deformation of the cold screen by opening simple gaps. The deformation compensation effect is poor. Before and after the cold screen is cooled down, the temperature difference on the surface of the cold screen reaches more than 150°C. Compared with the normal temperature Dewar surface, the cold screen will generate tens of millimeters of thermal displacement. This will cause gaps of different sizes to appear at the overlapping part of the cold screen edge, thereby aggravating the heat leakage at the edge of the cold screen and significantly increasing the operating load and energy consumption of the device's low temperature refrigeration system.

[0005] Therefore, the existing support structure of cold screens has the problem of low resistance to deformation. Utility Model Content

[0006] The purpose of this invention is to solve the problem that the existing support structure of cold screen has low resistance to deformation.

[0007] To achieve the above objectives, this utility model provides a multi-point thermal cutoff support structure for a stellarator cold screen, comprising: a Dewar, a cold screen, and support components. The Dewar has a cavity inside, and the cold screen is disposed within the cavity, comprising multiple cold screen plates that are spliced ​​and fixed to each other. Each cold screen plate is spaced apart from the wall of the Dewar. Support components are respectively disposed between some or all of the multiple cold screen plates and the wall of the Dewar. The support components include rigid support components and flexible support components. The rigid support components are disposed between the center of the cold screen plate and the corresponding part of the wall of the Dewar, and both ends of the rigid support components along their length are fixedly connected to the cold screen plate and the wall of the Dewar, respectively. The flexible support components are disposed between the outer edge area of ​​the cold screen plate and the corresponding part of the wall of the Dewar, and both ends of the flexible support components along their length are fixedly connected to the cold screen and the wall of the Dewar, respectively.

[0008] By adopting the above technical solution, the cold shield can block the radiative heat leakage from the Dewar's tile wall to its internal chamber, allowing the internal chamber of the Dewar to maintain the required temperature, thereby ensuring that the internal components can work in an ideal environment and improving the operational stability of the entire device. A rigid support component is fixedly connected between the cold shield plate and the Dewar's tile wall. The rigid support component can provide sufficient support force to the cold shield plate, ensuring that the cold shield plate as a whole has better rigidity. Furthermore, the rigid support component is located in the center of the cold shield plate. This arrangement allows the support force of the rigid support component on the cold shield plate to be radiated more evenly to other parts of the cold shield plate.

[0009] In addition, the cold screen needs to go through a process from room temperature to low temperature and then back to room temperature during use. The maximum temperature difference during this process can reach more than 150°C. Compared with the Dewar surface at room temperature, the cold screen will have a large displacement during the temperature change. The area with the greatest deformation on the cold screen is the edge. By setting the flexible support component on the outer edge of the cold screen, the flexible support component can offset the deformation of the outer edge of the cold screen through its own deformation, effectively reducing the installation gap between the cold screen and the support component caused by deformation, thereby solving the problem of heat leakage at the edge of the cold screen.

[0010] In summary, the rigid support component in this support assembly can provide sufficient support for the cold screen, and the flexible support component can offset the overall deformation of the cold screen through its own deformation, thereby solving the problem of low deformation resistance of existing cold screen support structures.

[0011] According to the stellarator cold screen multi-point thermal cutoff support structure disclosed in this utility model, the support assembly has multiple flexible support components, which are arranged circumferentially around the rigid support component.

[0012] By adopting the above technical solution, multiple flexible support components are set in the outer edge area of ​​the cold screen plate, which can provide stronger support for the cold screen plate. The flexible support components are circumferentially spaced around the rigid support components, so that multiple flexible support components can provide uniform elastic constraint along the central circumference of the cold screen plate and jointly provide a larger deformation range for the cold screen plate. This effectively releases the deformation of the cold screen plate under temperature changes and avoids the cold screen plate from being damaged due to local stress concentration caused by deformation.

[0013] According to the stellarator cold screen multi-point thermal cutoff support structure disclosed in this utility model, the flexible support component includes a support body and two first elastic members. The support body extends along the length direction of the flexible support component, and the two first elastic members are respectively disposed at both ends of the support body along its extension direction. The two first elastic members are respectively fixedly connected to the cold screen plate and the tile wall of the Dewar. In the length direction of the flexible support component, a second elastic member is disposed between the support body and the two first elastic members.

[0014] By adopting the above technical solution, the support body can provide support force when the flexible support component deforms, ensuring that the relative positions of the two first elastic elements at both ends of the support body do not change significantly. These first elastic elements serve as the main support for the cold shield plate when the flexible support component deforms. The deformation of the two first elastic elements acts as the main deformation element when the flexible support component deforms, and their deformation is used to offset the deformation of the cold shield plate relative to the Dewar. The two first elastic elements are fixedly connected to the walls of the cold shield plate and the Dewar, respectively, allowing them to deform simultaneously at a distance to offset the deformation of the cold shield plate relative to the Dewar. This arrangement reduces the deformation of a single first elastic element, giving it better durability and improving the stability of the flexible support component. A second elastic element is provided between the support body and the two first elastic elements. This second elastic element absorbs the compressive force generated by the deformation of the first elastic elements on the support body, preventing frequent deformation and compression of the support body by the first elastic elements, which could lead to significant wear at the connection between the support body and the first elastic elements. This improves the service life and stability of the flexible support component.

[0015] According to the stellarator cold screen multi-point thermal cutoff support structure disclosed in this utility model, the first elastic element is a spring, which includes a connecting post extending in the length direction of the flexible support component and an elastic buffer fixedly connected to the outer periphery of the connecting post. The elastic buffer extends in the length direction of the connecting post, and the two ends of the support body along its extension direction are respectively fixedly connected to the connecting posts of the two first elastic elements. A second elastic element is provided between the end of the connecting post of the two first elastic elements facing the support body and the support body. The end of the elastic buffer of the two first elastic elements away from the support body is respectively fixedly connected to the tile wall of the Dewar and the cold screen plate. The second elastic element is an elastic gasket, and the support body is a hollow component. The internal cavity of the hollow component is used for the passage of coolant.

[0016] Using the above technical solution, the elastic buffer of the spring, as the main deformable component of the spring, can offset the deformation of the cold screen plate relative to the Dewar through its own deformation. The elastic buffers of the two springs are fixedly connected to the wall of the Dewar and the cold screen plate at the ends away from the support body, respectively, so that the two elastic buffers with a certain distance deform simultaneously to offset the deformation of the cold screen plate relative to the Dewar. This setting can reduce the deformation range required by a single elastic buffer. During the deformation process of the elastic buffer, the elastic buffer will drive the connecting post of the spring to squeeze the support body. The second elastic component can absorb the squeezing force of the connecting post of the spring on the support body, avoid the connecting post from squeezing the support body, reduce the wear of the support body, and improve the durability and stability of the support body and the spring. The second elastic component is set as an elastic gasket. The elastic gasket can absorb sufficient squeezing force and has low manufacturing cost and simple installation method. The coolant in the internal cavity of the support body can carry the heat of the support body out of the flexible support body through the coolant, preventing the temperature of the support body from being transferred to the cold screen plate and affecting the temperature of the internal cavity of the Dewar.

[0017] According to the stellarator cold screen multi-point thermal cutoff support structure disclosed in this utility model, the elastic buffer includes multiple spring pieces spaced circumferentially on the outer periphery of the connecting column. Each spring piece extends in the length and radial directions of the connecting column and includes a first part, a second part, a third part, and a fourth part that are sequentially bent and connected along its length. The first part extends radially outward from the outer periphery of the end of the connecting column away from the support body to meet one end of the second part. The second part extends radially outward from the end of the first part away from the connecting column to the outer periphery of the other end of the connecting column. The third part extends radially outward from the end of the second part away from the first part. The fourth part extends radially outward from the end of the second part away from the first part. The fourth part extends radially outward from the end of the third part away from the second part to the outer periphery of one end of the connecting column and is spaced apart from the second part in the radial direction of the connecting column. The fourth parts of the two elastic buffers are respectively fixedly connected to the wall of the Dewar and the cold screen plate.

[0018] Using the above technical solution, the buffering effect of the elastic buffer mainly relies on the joint deformation of multiple spring pieces. These spring pieces are spaced apart on the outer periphery of the connecting column. This arrangement ensures that the force transmitted to the connecting column after deformation is more uniform in the circumferential direction, preventing localized stress concentration caused by the deformation of a single spring piece. The spring pieces can gradually deform by relying on the sequentially bent and connected first, second, third, and fourth parts. When the cold shield plate deforms, the fourth part deforms first, then the third part, then the second part, and finally the first part. This sequential deformation gradually distributes the deformation of the cold shield plate to each part, preventing excessive deformation of a single part of the spring piece and resulting in localized stress concentration. The fourth part is spaced apart from the second part in the radial direction of the connecting column, while the first and third parts are spaced apart in the axial direction of the connecting column, providing deformation space between the parts and allowing the spring pieces to have a larger deformation range.

[0019] According to the stellarator cold screen multi-point thermal cutoff support structure disclosed in this utility model, both ends of the support body are connected to the connecting columns of the two first elastic elements by threads, and the threads at both ends of the support body have opposite directions.

[0020] By adopting the above technical solution, during the installation of the support body and the two first elastic elements, it is only necessary to rotate the support body in a certain circumferential direction to simultaneously thread the two first elastic elements to both ends of the support body. By rotating the support body in the opposite direction, the two first elastic elements can be simultaneously removed from both ends of the support body. This installation method is simple and convenient to operate, and can effectively improve the assembly efficiency of flexible support components.

[0021] According to the stellarator cold screen multi-point thermal cutoff support structure disclosed in this utility model, the rigid support component includes a rigid support body and two mounting plates. The two mounting plates are respectively fixedly connected to both ends of the rigid support body, and the two mounting plates are respectively fixedly connected to the cold screen plate and the wall of the Dewar.

[0022] Using the above technical solution, the rigid support component is fixedly connected to the cold screen plate and the tile wall of the Dewar through two mounting plates. This arrangement allows for a large contact area between the rigid support component and the cold screen plate, as well as between the rigid support component and the tile wall of the Dewar, thereby providing a better support effect for the cold screen plate and the tile wall of the Dewar. The rigid support body, as the main support component of the rigid support component, can provide sufficient support force for the two mounting plates to meet the rigidity requirements of the cold screen plate.

[0023] According to the stellarator cold screen multi-point thermal cutoff support structure disclosed in this utility model, the rigid support body includes a mandrel and a sleeve. The sleeve is fixedly sleeved on the outer circumferential surface of the mandrel, and the thermal expansion coefficient of the sleeve is lower than that of the mandrel. One end of the mandrel and one end of the sleeve together constitute one end of the rigid support body, and the other end of the mandrel and the other end of the sleeve together constitute the other end of the rigid support body.

[0024] By adopting the above technical solution, after the rigid support body undergoes temperature changes, the sleeve with a lower coefficient of thermal expansion deforms less, while the mandrel with a higher coefficient of thermal expansion deforms more. The sleeve can be placed on the outer circumference of the mandrel to effectively resist the deformation of the mandrel and effectively reduce the deformation of the rigid support body. In addition, materials with a low coefficient of thermal expansion are more expensive than materials with a high coefficient of thermal expansion. Choosing to use materials with a low coefficient of thermal expansion to make a sleeve that uses less material can reduce the manufacturing cost of the rigid support body while ensuring its rigidity.

[0025] According to the stellarator cold screen multi-point thermal cutoff support structure disclosed in this utility model, the sleeve of the rigid support body is provided with a flow channel structure for the passage of coolant.

[0026] By adopting the above technical solution, the coolant flowing in the flow channel structure of the sleeve can carry away the heat inside the rigid support body, preventing the temperature of the rigid support body from being transferred to the cold shield plate and affecting the temperature of the internal chamber of the Dewar.

[0027] This utility model also discloses a stellarator, including the stellarator cold screen multi-point thermal cutoff support structure with the above-described structure.

[0028] By adopting the above technical solution, the stellarator equipped with the above support structure can have better resistance to deformation and can also avoid heat conduction between the Dewar and the cold screen through the support structure, thereby reducing the heat load on the cold screen and the low-temperature magnet, and improving the overall working performance and operational reliability of the cold screen.

[0029] The beneficial effects of this utility model are as follows:

[0030] This invention provides a multi-point thermal cutoff support structure for a stellarator cold screen and a stellarator, comprising: a Dewar, a cold screen, and support components. The Dewar has a cavity inside, and the cold screen is disposed within the cavity, comprising multiple cold screen plates that are spliced ​​and fixed to each other. Each cold screen plate is spaced apart from the wall of the Dewar. Support components are respectively disposed between some or all of the multiple cold screen plates and the wall of the Dewar. The support components include rigid support components and flexible support components. The rigid support components are disposed between the center of the cold screen plate and the corresponding part of the wall of the Dewar, and the flexible support components are disposed between the outer edge area of ​​the cold screen plate and the corresponding part of the wall of the Dewar. The flexible support components can offset the overall deformation of the support structure through their own deformation, so that this cold screen support structure can solve the problem of low deformation resistance of existing support structures. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the multi-point thermal cutoff support structure for the stellarator cold screen provided in this embodiment of the utility model;

[0032] Figure 2 This is a bottom view of the cold screen plate and support components in the stellarator cold screen multi-point thermal cutoff support structure provided in this embodiment of the utility model;

[0033] Figure 3 This is a side view of the flexible support component in the multi-point thermal cutoff support structure for the stellarator cold screen provided in this embodiment of the utility model.

[0034] Figure 4 This is a cross-sectional view of the flexible support component in the multi-point thermal cutoff support structure for the stellarator cold screen provided in this embodiment of the utility model.

[0035] Figure 5 This is a three-dimensional structural diagram of the flexible support component in the multi-point thermal cutoff support structure for the stellarator cold screen provided in this embodiment of the utility model.

[0036] Figure 6 This is a three-dimensional structural diagram of the rigid support component in the multi-point thermal cutoff support structure for the stellarator cold screen provided in this embodiment of the utility model.

[0037] Figure 7 This is a cross-sectional view of the rigid support component in the multi-point thermal cutoff support structure for the stellarator cold screen provided in this embodiment of the utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100. Dewar; 110. Tiles;

[0040] 200. Cold screen; 210. Cold screen panel; 211. Center part; 212. Outer edge area;

[0041] 300. Rigid support component; 310. Rigid support body; 311. Mandrel; 312. Sleeve; 3121. Flow channel structure; 320. Mounting plate;

[0042] 400. Flexible support component; 410. Support body; 411. Internal cavity; 420. First elastic element; 421. Connecting column; 422. Elastic buffer; 4221. First part; 4222. Second part; 4223. Third part; 4224. Fourth part; 430. Second elastic element. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0044] This invention provides a multi-point thermal cutoff support structure for a stellarator cold screen, which supports the Dewar and the cold screen.

[0045] Specifically, such as Figures 1 to 2 As shown, the stellarator cold screen multi-point thermal cutoff support structure includes: a Dewar 100, a cold screen 200, and support components. The Dewar 100 has a cavity inside, and the cold screen 200 is disposed in the cavity and includes multiple cold screen plates 210 that are spliced ​​and fixed to each other. Each cold screen plate 210 includes a central part 211 and an outer edge region 212. The outer edge region 212 is a region that extends from the outer edge toward the central part 211 by one end. Each cold screen plate 210 is disposed at a distance from the wall 110 of the Dewar 100. Support components are respectively disposed between some or all of the multiple cold screen plates 210 and the wall 110 of the Dewar 100.

[0046] Regarding the Dewar 100, it is used to house the cold shield 200, support components, and other internal parts. The chamber inside the Dewar 100 is evacuated to provide support and a vacuum environment for the internal components such as the magnet. It should be noted that the Dewar 100 is designed with many windows for connecting the internal system with the external environment.

[0047] Regarding the cold shield 200, the cold shield 200 can block the radiative heat leakage from the tile wall 110 of the Dewar 100 to its internal chamber, so that the internal chamber of the Dewar 100 can maintain the required temperature, thereby ensuring that the internal components can work in an ideal environment and improving the operational stability of the entire device.

[0048] Regarding the support assembly, the support assembly is used to support the cold shield plate 210 and the tile wall 110 of the Dewar 100. The support assembly includes a rigid support component 300 and a flexible support component 400.

[0049] The rigid support member 300 is disposed between the center 211 of the cold screen plate 210 and the corresponding part of the tile wall 110 of the Dewar 100. The two ends of the rigid support member 300 along its length direction are fixedly connected to the cold screen plate 210 and the tile wall 110 of the Dewar 100, respectively. This arrangement allows the supporting force of the rigid support member 300 on the cold screen plate 210 to be radiated more evenly to other positions of the cold screen plate 210.

[0050] A flexible support component 400 is disposed between the outer edge region 212 of the cold screen plate 210 and the corresponding part of the tile wall 110 of the Dewar 100. The two ends of the flexible support component 400 along its length are fixedly connected to the cold screen 200 and the tile wall 110 of the Dewar 100, respectively. During use, the cold screen plate 210 needs to undergo a process from room temperature to low temperature and then back to room temperature. The maximum temperature difference during this process can reach more than 150°C. Compared with the surface of the Dewar 100 at room temperature, the cold screen plate 210 will have a large displacement during the temperature change. The area with the largest deformation on the cold screen plate 210 is the outer edge region 212 of the cold screen plate 210. By placing the flexible support component 400 in the outer edge region 212 of the cold screen plate 210, the flexible support component 400 can offset the deformation of the outer edge region 212 of the cold screen plate 210 through its own deformation, effectively reducing the installation gap between the cold screen plate 210 and the support component caused by deformation, thereby solving the problem of heat leakage in the outer edge region 212 of the cold screen plate 210.

[0051] It should be noted that the specific structure of the flexible support component 400 is not limited. For example, it can be set as an integral structure or as a split structure composed of multiple flexible support components. The location of the flexible support component 400 is not limited. For example, it can be set at the corner of the outer edge region 212 of the cold screen plate 210 or at the position near the side of the outer edge region 212 of the cold screen plate 210. This embodiment does not make further limitations here.

[0052] It should be further noted that the method of fixing is not limited. For example, it can be welding or snap-fit ​​connection. This embodiment does not make any further limitations here.

[0053] In this application, a stellarator cold screen multi-point thermal cutoff support structure based on the above-described embodiments is provided. The support assembly includes multiple flexible support components 400. The specific number of flexible support components 400 is not limited; for example, two, three, or four can be provided. The specific number can be selected according to actual needs. Multiple flexible support components 400 are spaced circumferentially around the rigid support component 300. The multiple flexible support components 400 positioned on the outer edge region 212 of the cold screen plate 210 can provide stronger support for the cold screen plate 210. The circumferential spacing of the flexible support components 400 around the rigid support component 300 allows the multiple flexible support components 400 to provide uniform elastic constraint along the center 211 of the cold screen plate 210, and together provide a larger deformation range for the cold screen plate 210. This effectively releases the deformation of the cold screen plate 210 under temperature changes, preventing damage to the cold screen plate 210 due to localized stress concentration caused by deformation.

[0054] In this application, a stellarator cold screen multi-point thermal cutoff support structure based on the above embodiments is provided, such as... Figures 3 to 4 As shown, the flexible support component 400 includes a support body 410 and two first elastic elements 420. The support body 410 extends along the length of the flexible support component 400. The support body 410 provides support force when the flexible support component 400 deforms, ensuring that the relative positions of the two first elastic elements 420 at both ends of the support body 410 do not change significantly. It serves as the main support component for the flexible support component 400 supporting the cold screen plate 210. The two first elastic elements 420 are respectively disposed at both ends of the support body 410 along its extension direction. The two first elastic elements 420 are fixedly connected to the cold screen plate 210 and the tile wall 110 of the Dewar 100, respectively. When the flexible support component 400 deforms, the two first elastic elements 420 act as the main deformation components, and their deformation is used to offset the deformation of the cold screen plate 210. Regarding the deformation of Dewar 100, the two first elastic elements 420 can deform simultaneously at a distance to counteract the deformation of the cold shield plate 210 relative to Dewar 100. This arrangement reduces the deformation of a single first elastic element 420, resulting in better durability for the first elastic element 420. In the length direction of the flexible support component 400, a second elastic element 430 is provided between the support body 410 and the two first elastic elements 420. The second elastic element 430 can absorb the compressive force generated by the deformation of the first elastic element 420 on the support body 410, avoiding frequent deformation and compression of the support body 410 by the first elastic element 420, which would cause significant wear at the connection between the support body 410 and the first elastic element 420, thereby improving the service life and operational stability of the flexible support component 400.

[0055] It should be noted that the specific structure of the first elastic element 420 and the second elastic element 430 is not limited. For example, they can be set as springs, leaf springs, or elastic pads. This embodiment does not make any further limitations.

[0056] It should be further noted that the specific material of the supporting body 410 is not limited. For example, it can be made of epoxy fiberglass or stainless steel. This embodiment does not make any further limitations.

[0057] In this application, a stellarator cold screen multi-point thermal cutoff support structure based on the above embodiments is provided, such as... Figures 4 to 5 As shown, the first elastic element 420 is a spring. The spring includes a connecting post 421 extending in the length direction of the flexible support member 400 and an elastic buffer 422 fixedly connected to the outer periphery of the connecting post 421. The elastic buffer 422 extends in the length direction of the connecting post 421. As the main deformable element of the spring, the elastic buffer 422 of the spring can offset the deformation of the cold screen plate 210 relative to the Dewar 100 through its own deformation. The elastic buffers 422 of the two springs are fixedly connected to the tile wall 110 of the Dewar 100 and the cold screen plate 210 at the end away from the support body 410, respectively, so that the two elastic buffers 422 with a certain distance deform at the same time to offset the deformation of the cold screen plate 210 relative to the Dewar 100. This arrangement can reduce the deformation amplitude required for a single elastic buffer 422.

[0058] Furthermore, the two ends of the support body 410 along its extension direction are respectively fixedly connected to the connecting posts 421 of the two first elastic elements 420. A second elastic element 430 is provided between the end of the connecting post 421 of the two first elastic elements 420 facing the support body 410 and the support body 410. The ends of the elastic buffers 422 of the two first elastic elements 420 away from the support body 410 are respectively fixedly connected to the tile wall 110 and the cold screen plate 210 of the Dewar 100. During the deformation of the elastic buffer 422, the elastic buffer 422 will drive the connecting post 421 of the spring to squeeze the support body 410. The second elastic element 430 can absorb the squeezing force of the connecting post 421 of the spring on the support body 410, avoid the connecting post 421 from squeezing the support body 410, and reduce the wear of the support body 410.

[0059] In addition, the second elastic element 430 is an elastic gasket. The elastic gasket can absorb sufficient compressive force and has low manufacturing cost and simple installation method. The support body 410 is a hollow component. The internal cavity 411 of the hollow component is used for the passage of coolant. The coolant can carry the heat of the support body 410 out of the flexible support component 400, preventing the temperature of the support body 410 from being transferred to the cold shield plate 210 and affecting the temperature of the internal cavity of the Dewar 100.

[0060] It should be noted that the choice of coolant is not limited. For example, liquid nitrogen, alcohol-water solution, or fluorinated liquid can be used. This embodiment does not make any further limitations.

[0061] In this application, based on the above-described stellarator cold screen multi-point thermal cutoff support structure, the elastic buffer 422 includes multiple spring pieces spaced circumferentially along the outer periphery of the connecting post 421. The specific number of spring pieces is not limited; for example, it can be 2, 3, or 4. The specific number can be selected according to actual needs. Each spring piece extends along the length and radial direction of the connecting post 421 and includes a first part 4221, a second part 4222, a third part 4223, and a fourth part 4224 that are sequentially bent and connected along its length. The first part 4221 extends radially outward from the outer periphery of the end of the connecting post 421 away from the support body 410 to meet one end of the second part 4222. The second part 4222 extends radially outward from the outer periphery of the first part 4222. 221 extends from the end away from the connecting post 421 along the length of the connecting post 421 to the outer periphery of the other end of the connecting post 421. The third part 4223 extends radially outward from the end of the second part 4222 away from the first part 4221 along the connecting post 421. The buffering effect of the elastic buffer 422 mainly relies on the joint deformation of multiple spring pieces. Multiple spring pieces are spaced apart on the outer periphery of the connecting post 421. This arrangement makes the force transmitted to the connecting post 421 after the multiple spring pieces are deformed more uniform in the circumferential direction of the connecting post 421. It can avoid the situation where the connecting post 421 is localized due to the deformation of a single spring piece. The spring pieces can be gradually deformed by the structure of the first part 4221, the second part 4222, the third part 4223 and the fourth part 4224 that are bent and connected in sequence.

[0062] Furthermore, the fourth part 4224 of the two elastic buffers 422 is fixedly connected to the tile wall 110 of the Dewar 100 and the cold screen plate 210 at the end away from the support body 410, respectively. When the cold screen plate 210 deforms, it first drives the fourth part 4224 to deform, then the fourth part 4224 drives the third part 4223, then the third part 4223 drives the second part 4222, and finally the second part 4222 drives the first part 4221. This sequential deformation can gradually distribute the deformation of the cold screen plate 210 to each part, avoiding the problem of local stress concentration caused by excessive deformation of a single part of the spring sheet.

[0063] In addition, the fourth part 4224 extends from the end of the third part 4223 away from the second part 4222 along the length of the connecting post 421 to the outer periphery of one end of the connecting post 421, and is arranged radially opposite to the second part 4222. The first part 4221 and the third part 4223 are a certain distance apart in the axial direction of the connecting post 421, so that there is a deformation space between each part, allowing the spring to have a larger deformation amount.

[0064] In this application, based on the above-described stellarator cold screen multi-point thermal cutoff support structure, both ends of the support body 410 are threadedly connected to the connecting posts 421 of the two first elastic members 420. The threads at both ends of the support body 410 rotate in opposite directions. During the installation of the support body 410 and the two first elastic members 420, it is only necessary to rotate the support body 410 in a certain circumferential direction to simultaneously thread the two first elastic members 420 to both ends of the support body 410. By rotating the support body 410 in the opposite direction, the two first elastic members 420 can be simultaneously removed from both ends of the support body 410. This installation method is simple and convenient, and can effectively improve the assembly efficiency of the flexible support component 400.

[0065] In this application, a stellarator cold screen multi-point thermal cutoff support structure based on the above embodiments is provided, such as... Figures 6 to 7 As shown, the rigid support component 300 includes a rigid support body 310 and two mounting plates 320. The two mounting plates 320 are fixedly connected to both ends of the rigid support body 310, and are fixedly connected to the cold screen plate 210 and the tile wall 110 of the Dewar 100, respectively. The rigid support component 300 is fixedly connected to the cold screen plate 210 and the tile wall 110 of the Dewar 100 through the two mounting plates 320. This arrangement allows for a large contact area between the rigid support component 300 and the cold screen plate 210, as well as between the rigid support component 300 and the tile wall 110 of the Dewar 100, thereby providing a better support effect for the cold screen plate 210 and the tile wall 110 of the Dewar 100. The rigid support body 310, as the main support component of the rigid support component 300, can provide sufficient support force for the two mounting plates 320 to meet the rigidity requirements of the cold screen plate 210.

[0066] In this application, a stellarator cold screen multi-point thermal cutoff support structure based on the above embodiments is provided. The rigid support body 310 includes a mandrel 311 and a sleeve 312. The sleeve 312 is fixedly sleeved on the outer circumferential surface of the mandrel 311. The thermal expansion coefficient of the sleeve 312 is lower than that of the mandrel 311. One end of the mandrel 311 and one end of the sleeve 312 together constitute one end of the rigid support body 310. The other end of the mandrel 311 and the other end of the sleeve 312 together constitute the other end of the rigid support body 310. When the rigid support body 310 undergoes temperature changes... Subsequently, the sleeve 312, which has a lower coefficient of thermal expansion, deforms less, while the mandrel 311, which has a higher coefficient of thermal expansion, deforms more. Sleeving the sleeve 312 onto the outer circumference of the mandrel 311 can effectively resist the deformation of the mandrel 311 and effectively reduce the deformation of the rigid support body 310. In addition, materials with a low coefficient of thermal expansion have a higher cost than materials with a high coefficient of thermal expansion. Choosing to use a material with a low coefficient of thermal expansion to make the sleeve 312, which uses less material, can reduce the manufacturing cost of the rigid support body 310 while ensuring the rigidity of the rigid support body 310.

[0067] It should be noted that the mandrel 311 and the sleeve 312 can be configured as an interference fit. The mandrel 311, the sleeve 312 and the two mounting plates 320 can all be fixedly connected by laser welding. The sleeve 312, which has a low coefficient of thermal expansion, can be made of Invar alloy or silicon carbide. The mandrel 311, which has a high coefficient of thermal expansion, can be made of titanium alloy or aluminum alloy. This embodiment does not make further limitations.

[0068] In this application, a stellarator cold screen multi-point heat cutoff support structure is provided based on the above embodiments. The sleeve 312 of the rigid support body 310 is provided with a flow channel structure 3121. The flow channel structure 3121 is used for coolant to pass through. The coolant flows in the flow channel structure 3121 of the sleeve 312 to remove the heat inside the rigid support body 310 and prevent the temperature of the rigid support body 310 from being transferred to the cold screen plate 210, which would affect the temperature of the internal chamber of the Dewar 100.

[0069] It should be noted that the structure of the flow channel structure 3121 is not limited. For example, it can be set as a straight pipe or a spiral pipe. This embodiment does not make any further limitations.

[0070] This utility model also provides a stellarator, including the stellarator cold screen multi-point thermal cutoff support structure in the above embodiments. The stellarator with the above support structure can have better resistance to deformation and can also avoid the situation where heat is conducted between Dewar 100 and cold screen 200 through the support structure, thereby reducing the heat load of cold screen 200 and low temperature conductor, and improving the overall working performance and operational reliability of the stellarator.

[0071] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. In order to provide a deep understanding of this utility model, many specific details are included in the above description, and this utility model may also be implemented without using these details. In addition, in order to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0072] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0073] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model 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 the utility model.

[0074] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0075] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0076] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A multi-point thermal cutoff support structure for a stellarator cold screen, characterized in that, include: Dewar, wherein the interior of the Dewar has a cavity; A cold screen is disposed in the cavity and includes multiple cold screen panels that are spliced ​​and fixed to each other. Each cold screen panel is disposed at a distance from the wall of the Dewar. Support components are respectively disposed between some or all of the multiple cold screen panels and the wall of the Dewar. The support assembly includes a rigid support component and a flexible support component. The rigid support component is disposed between the center of the cold shield plate and the corresponding part of the tile wall of the Dewar, and its two ends along its length are respectively fixedly connected to the cold shield plate and the tile wall of the Dewar. The flexible support component is disposed between the outer edge region of the cold shield plate and the corresponding part of the tile wall of the Dewar, and its two ends along its length are respectively fixedly connected to the cold shield plate and the tile wall of the Dewar.

2. The stellarator cold screen multi-point thermal cutoff support structure as described in claim 1, characterized in that, The support assembly has multiple flexible support components, which are spaced apart circumferentially around the rigid support component.

3. The stellarator cold screen multi-point thermal cutoff support structure as described in claim 1, characterized in that, The flexible support component includes a support body and two first elastic elements. The support body extends along the length direction of the flexible support component. The two first elastic elements are respectively disposed at both ends of the support body along its extension direction. The two first elastic elements are respectively fixedly connected to the cold shield plate and the tile wall of the Dewar. In the length direction of the flexible support component, a second elastic element is disposed between the support body and the two first elastic elements.

4. The stellarator cold screen multi-point thermal cutoff support structure as described in claim 3, characterized in that, The first elastic element is a spring, which includes a connecting post extending along the length of the flexible support member and an elastic buffer fixedly connected to the outer periphery of the connecting post. The elastic buffer extends along the length of the connecting post, and the two ends of the support body along its extension direction are respectively fixedly connected to the connecting posts of the two first elastic elements. A second elastic element is provided between the end of the connecting post of the two first elastic elements facing the support body and the support body. The ends of the elastic buffers of the two first elastic elements away from the support body are respectively fixedly connected to the tile wall of the Dewar and the cold shield plate. The second elastic element is an elastic gasket. The support body is a hollow component, and the internal cavity of the hollow component is used for the passage of coolant.

5. The stellarator cold screen multi-point thermal cutoff support structure as described in claim 4, characterized in that, The elastic buffer includes a plurality of spring pieces spaced circumferentially on the outer periphery of the connecting post. Each spring piece extends in the length and radial directions of the connecting post and includes a first part, a second part, a third part, and a fourth part that are sequentially bent and connected along its length. The first part extends radially outward from the outer periphery of the end of the connecting post away from the support body to meet the end of the second part. The second part extends radially outward from the end of the first part away from the connecting post to the outer periphery of the other end of the connecting post. The third part extends radially outward from the end of the second part away from the first part. The fourth part extends radially outward from the end of the third part away from the second part to the outer periphery of one end of the connecting post, and is spaced apart from the second part in the radial direction of the connecting post. The fourth portion of each of the two elastic buffers, at the end furthest from the support body, is fixedly connected to the tile wall of the Dewar and the cold shield plate, respectively.

6. The stellarator cold screen multi-point thermal cutoff support structure as described in claim 4, characterized in that, Both ends of the support body are threadedly connected to the connecting posts of the two first elastic elements, and the threads at both ends of the support body rotate in opposite directions.

7. The stellarator cold screen multi-point thermal cutoff support structure as described in any one of claims 1-6, characterized in that, The rigid support component includes a rigid support body and two mounting plates. The two mounting plates are respectively fixedly connected to both ends of the rigid support body, and the two mounting plates are respectively fixedly connected to the cold shield plate and the tile wall of the Dewar.

8. The stellarator cold screen multi-point thermal cutoff support structure as described in claim 7, characterized in that, The rigid support body includes a mandrel and a sleeve. The sleeve is fixedly sleeved on the outer circumferential surface of the mandrel. The thermal expansion coefficient of the sleeve is higher than that of the mandrel. One end of the mandrel and one end of the sleeve together constitute one end of the rigid support body, and the other end of the mandrel and the other end of the sleeve together constitute the other end of the rigid support body.

9. The stellarator cold screen multi-point thermal cutoff support structure as described in claim 8, characterized in that, The sleeve of the rigid support body is provided with a flow channel structure for the passage of coolant.

10. A stellarator, characterized in that, Including the stellarator cold screen multi-point thermal cutoff support structure as described in any one of claims 1 to 9.

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