Nuclear fusion cold screen inter-joint structure and nuclear fusion device

Abstract

The present invention discloses a joint structure between nuclear fusion cold shields and a nuclear fusion device, belonging to the technical field of nuclear fusion devices. In the joint structure between nuclear fusion cold shields, a first joint member includes a first self-deforming plate and a first baffle located behind the first self-deforming plate. The first self-deforming plate and the first baffle are arranged in sequence from front to back, connected to each other at one end and unconnected at the other end, so that first slots are formed between adjacent first self-deforming plates and first baffles, and between adjacent first baffles. The second joint member includes a second baffle, with a second baffle inserted into each first slot. The first baffles and the second baffles are arranged alternately and staggered in the front-to-back direction, with the first self-deforming plate located at the frontmost position. When the present invention enters a low-temperature working environment from a normal temperature environment, the first self-deforming plate deforms from its initial position toward the adjacent second baffle due to the decrease in temperature. The present invention is easy to install, can effectively improve the thermal shielding effect of the cold shield, and has a reliable structure.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear fusion devices, and in particular relates to a nuclear fusion cold shield inter-joint structure and a nuclear fusion device. Background Art

[0002] As a crucial component of a tokamak nuclear fusion device, the cold shield's primary function is to isolate the thermal radiation from high-temperature components from affecting low-temperature systems, such as superconducting magnets, allowing them to operate normally in their corresponding low-temperature environments. Inadequate heat shielding from the cold shield could cause low-temperature components to malfunction.

[0003] The cold screen is primarily divided into an upper, middle, and lower cold screen. These three parts are supported differently. To prevent deformation stress from affecting each part, they must be separated by gaps to prevent hard contact. However, to isolate thermal radiation, joint structures are installed at the junctions between the upper and middle cold screens, and between the middle and lower cold screens. The upper and lower joints of the joint structure are typically C- or E-shaped. Due to the installation requirements of large cold screen components, the spacing between the upper and lower joints cannot be too small, typically measuring centimeters. Excessive spacing will allow more thermal radiation to reach the low-temperature system through the gaps in the cold screen joint structure. Therefore, the spacing between the upper and lower joints needs to be minimized. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a joint structure between nuclear fusion cold shields that is easy to install, can effectively improve the thermal shielding effect of the joints between cold shields, and has a simple and reliable structure.

[0005] The inter-seam structure of the nuclear fusion cold shield according to an embodiment of the present invention comprises a first seam member and a second seam member provided between adjacent first and second cold shields spaced end to end;

[0006] One end of the first seam is fixed to the first cold shield, the first seam includes a first self-deformable plate and at least one first baffle located behind the first self-deformable plate, the first self-deformable plate and the first baffle are arranged face to face from front to back and are connected to each other at one end and not connected to each other at the other end, so that first slots are formed between adjacent first self-deformable plates and first baffles and between adjacent first baffles respectively;

[0007] One end of the second seam is fixed to the second cold shield, and the second seam includes second baffles. The number of the second baffles corresponds to the number of the first slots, and one second baffle is inserted into each first slot, so that the first baffles and the second baffles are alternately staggered in the front-to-back direction and the first self-deforming plate is located at the frontmost position; the second seam does not contact the first seam;

[0008] When the inter-joint structure of the nuclear fusion cold shield enters a low-temperature working environment from a normal temperature environment, the first self-deforming plate deforms from its initial position toward the adjacent second baffle due to a decrease in temperature.

[0009] According to the inter-seam structure of the nuclear fusion cold screen according to an embodiment of the present invention, on the one hand, at room temperature, the groove width of the first slot of the first seam member can be designed to meet the size required for convenient installation of the second baffle inserted into the second seam member. In this way, after the first seam member is fixed to the first cold screen and the second seam member is fixed to the second cold screen, when the first cold screen and the second cold screen are installed end to end, the first seam member and the second seam member are inserted into each other without contact, that is, a second baffle is inserted into each first slot, so that the first baffle and the second baffle are alternately staggered in the front-to-back direction and the first self-deforming plate is located at the frontmost position, which is convenient for installation. On the other hand, because the first seam is provided with the first self-deforming plate, when the inter-seam structure of the nuclear fusion cold shield of the embodiment of the present invention moves from a normal temperature environment to a low-temperature operating environment, the first self-deforming plate deforms from its initial position toward the adjacent second baffle due to the decrease in temperature. This results in the spacing between the deformed portion of the first self-deforming plate and the adjacent second baffle in the low-temperature operating environment being smaller than the spacing between the first self-deforming plate and the adjacent second baffle in the initial position at normal temperature. This effectively reduces heat radiation from the gap between the first and second seams, thereby effectively improving the thermal shielding effect of the cold shield and ensuring the normal operation of the low-temperature system of the nuclear fusion device. Furthermore, the first self-deforming plate of the first seam passively deforms due to the decrease in ambient temperature, eliminating the need for active deformation. This simplifies the structures of the first and second seams and ensures their reliability.

[0010] In some embodiments, the second seam member further comprises a second self-deforming plate, all of the second baffles are located in front of the second self-deforming plate, the second self-deforming plates and the second baffles are arranged face to face from back to front in sequence and are connected to each other at one end and not connected at the other end, so that second slots are formed between adjacent second self-deforming plates and second baffles and between adjacent second baffles respectively;

[0011] One of the first baffles is inserted into each of the second slots, so that the first baffles and the second baffles are alternately staggered in the front-to-back direction, and the first self-deforming plate is located at the frontmost position and the second self-deforming plate is located at the rearmost position;

[0012] When the inter-joint structure of the nuclear fusion cold shield enters a low-temperature working environment from a normal temperature environment, the first self-deforming plate deforms from its initial position toward the adjacent second baffle due to the temperature drop, and the second self-deforming plate deforms from its initial position toward the adjacent first baffle due to the temperature drop.

[0013] In some embodiments, one end of the first baffle is connected and fixed to the first connecting end portion, one end of the first self-deforming plate is fixed to the first connecting end portion, and the first connecting end portion is fixed to the first cold shield;

[0014] One end of the second baffle is connected and fixed to the second connecting end portion, one end of the second self-deforming plate is fixed to the second connecting end portion, and the second connecting end portion is fixed to the first cold shield.

[0015] In some embodiments, the materials of the first baffle and the first connecting end, the materials of the second baffle and the second connecting end, and the materials of the first cold shield and the second cold shield are all the same.

[0016] In some embodiments, the first self-deforming plate includes a first inner plate and a first outer plate attached to an outer surface of the first inner plate, and the thermal expansion coefficient of the material of the first inner plate is greater than the thermal expansion coefficient of the material of the first outer plate;

[0017] The second self-deforming plate includes a second inner plate and a second outer plate attached to an outer surface of the second inner plate. The thermal expansion coefficient of the material of the second inner plate is greater than the thermal expansion coefficient of the material of the second outer plate.

[0018] In some embodiments, the first inner plate is made of lead and the first outer plate is made of nickel.

[0019] In some embodiments, the second inner plate is made of lead and the second outer plate is made of nickel.

[0020] In some embodiments, the longitudinal cross-section of the first self-deforming plate includes a first semicircular arc connecting segment and a first straight segment, the concave side of the first semicircular arc connecting segment faces the second seam member, one end of the first semicircular arc connecting segment is connected to the outer end surface of the first connecting end portion, and the other end of the first semicircular arc connecting segment is connected to one end of the first straight segment;

[0021] The longitudinal cross-section of the second self-deforming plate includes a second semicircular arc connecting segment and a second straight segment, the concave side of the second semicircular arc connecting segment faces the first seam member, one end of the second semicircular arc connecting segment is connected to the outer end surface of the second connecting end portion, and the other end of the second semicircular arc connecting segment is connected to one end of the second straight segment.

[0022] In some embodiments, the depth of the first slots between adjacent first self-deformable plates and first baffles is greater than the depth of the remaining first slots, the length of the second baffle in the first slots between adjacent first self-deformable plates and first baffles is greater than the length of the remaining second baffles, and the other end surface of the second baffle in the first slots between adjacent first self-deformable plates and first baffles is flush with or close to the outer end surface of the first connecting end portion, the length of the first straight segment is greater than the length of all the first baffles, and the other end surface of the first straight segment is flush with or close to the outer end surface of the second connecting end portion;

[0023] The depth of the second slot between the adjacent second self-deforming plate and the second baffle is greater than the depth of the remaining second slots, the length of the first baffle in the second slot between the adjacent second self-deforming plate and the second baffle is greater than the length of the remaining first baffles, and the other end face of the first baffle in the second slot between the adjacent second self-deforming plate and the second baffle is flush with or close to the outer end face of the second connecting end portion, the length of the second straight segment is greater than the length of all the second baffles, and the other end face of the second straight segment is flush with or close to the outer end face of the first connecting end portion.

[0024] In some embodiments, the front side of the cross-section of the second baffle plate near the first self-deforming plate is a second arched edge, and the front side and rear side of the cross-section of the first self-deforming plate are both first straight edges; the front side of the cross-section of the first baffle plate near the second self-deforming plate is a first arched edge, and the front side and rear side of the cross-section of the second self-deforming plate are both second straight edges.

[0025] The invention also proposes a nuclear fusion device.

[0026] The nuclear fusion device according to an embodiment of the present invention includes the nuclear fusion cold shield indirect seam structure according to the embodiment of the present invention.

[0027] Since the nuclear fusion device of the embodiment of the present invention adopts the nuclear fusion cold shield indirect seam structure of the embodiment of the present invention, the nuclear fusion device of the embodiment of the present invention has basically the same technical effect as the cold shield indirect wind shading structure of the embodiment of the present invention.

[0028] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0030] Figure 1 This is a three-dimensional schematic diagram of the initial position of the inter-joint structure of a nuclear fusion cold shield under a normal temperature environment according to an embodiment of the present invention;

[0031] Figure 2 This is a side view schematic diagram of an initial position of an indirect seam structure of a nuclear fusion cold shield according to an embodiment of the present invention under a normal temperature environment;

[0032] Figure 3 This is a longitudinal cross-sectional schematic diagram of a nuclear fusion cold shield inter-joint structure shrinking and deforming under a low-temperature working environment according to an embodiment of the present invention;

[0033] Figure 4 This is a three-dimensional schematic diagram of the initial position of another inter-joint structure of a nuclear fusion cold shield in an embodiment of the present invention under a normal temperature environment;

[0034] Figure 5 This is a side view schematic diagram of an initial position of another nuclear fusion cold shield inter-slit structure under a normal temperature environment according to an embodiment of the present invention;

[0035] Figure 6 This is a three-dimensional schematic diagram of another nuclear fusion cold shield inter-joint structure shrinking and deforming in a low-temperature working environment according to an embodiment of the present invention;

[0036] Figure 7 It is a side view schematic diagram of another nuclear fusion cold shield indirect seam structure shrinking and deforming in a low-temperature working environment according to an embodiment of the present invention.

[0037] Reference numerals:

[0038] A joint structure 1000 between nuclear fusion cold shields; a first joint member 1; a first self-deforming plate 101; a first inner plate 1011; a first outer plate 1012; a first semicircular arc connecting section 1013; a first straight section 1014; a first straight edge 1015; a first baffle 102; a first arched convex edge 1021; a first slot 103; a first connecting end 104; a second joint member 2; a second self-deforming plate 201; a second inner plate 2011; a second outer plate 2012; a second semicircular arc connecting section 2013; a second straight section 2014; a second straight edge 2015; a second baffle 202; a second arched convex edge 2021; a second slot 203; a second connecting end 204; a first cold shield 3; and a second cold shield 4. DETAILED DESCRIPTION

[0039] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0040] The following combination Figures 1 to 7 The inter-seam structure 1000 of the nuclear fusion cold shield according to an embodiment of the present invention will be described.

[0041] like Figures 1 to 7 As shown, the inter-seam structure 1000 of the nuclear fusion cold shield according to an embodiment of the present invention includes a first seam member 1 and a second seam member 2 arranged between a first cold shield 3 and a second cold shield 4 that are spaced apart end to end in an upper and lower manner.

[0042] Specifically, one end of the first seam member 1 is fixed to the first cold screen 3, and the first seam member 1 includes a first self-deforming plate 101 and at least one first baffle 102 located on the rear side of the first self-deforming plate 101. The first self-deforming plate 101 and the first baffle 102 are arranged face to face in sequence from front to back and are connected to each other at one end and not connected to each other at the other end, so that first slots 103 are respectively formed between adjacent first self-deforming plates 101 and first baffles 102 and between adjacent first baffles 102.

[0043] One end of the second seam member 2 is fixed to the second cold screen 4, and the second seam member 2 includes a second baffle 202. The number of the second baffles 202 corresponds one-to-one to the number of the first slots 103. A second baffle 202 is inserted into each first slot 103, so that the first baffles 102 and the second baffle 202 are alternately staggered in the front-to-back direction and the first self-deforming plate 101 is located at the frontmost position.

[0044] When the inter-joint structure 1000 of the nuclear fusion cold shield enters a low-temperature working environment from a normal temperature environment, the first self-deforming plate 101 deforms from its initial position toward the adjacent second baffle 202 due to a decrease in temperature.

[0045] According to the inter-seam structure 1000 of the nuclear fusion cold screen according to the embodiment of the present invention, on the one hand, at room temperature, the groove width of the first slot 103 of the first seam member 1 can be designed to meet the size required for convenient installation of the second baffle 202 inserted into the second seam member 2. In this way, after the first seam member 1 is fixed to the first cold screen 3 and the second seam member 2 is fixed to the second cold screen 4, when the first cold screen 3 and the second cold screen 4 are installed end to end, the first seam member 1 and the second seam member 2 are inserted into each other without contact, that is, a second baffle 202 is inserted into each first slot 103, so that the first baffle 102 and the second baffle 202 are alternately staggered in the front-to-back direction and the first self-deforming plate 101 is located at the frontmost position, which is convenient for installation. On the other hand, because the first joint member 1 is provided with the first self-deforming plate 101, when the joint structure 1000 between the nuclear fusion cold shield and the device moves from a normal temperature environment to a low-temperature operating environment (approximately 100K), the first self-deforming plate 101 deforms from its initial position toward the adjacent second baffle 202 due to the drop in temperature. This results in a smaller distance between the deformed portion of the first self-deforming plate 101 and the adjacent second baffle 202 in the low-temperature operating environment than between the first self-deforming plate 101 and the adjacent second baffle 202 in the initial position at normal temperature. This effectively reduces heat radiation from the gap between the first joint member 1 and the second joint member 2, thereby effectively improving the thermal shielding effect of the cold shield and ensuring the normal operation of the low-temperature system of the nuclear fusion device. Furthermore, the first self-deforming plate 101 of the first joint member 1 passively deforms due to the drop in ambient temperature, eliminating the need for active deformation. This simplifies the structure of the first and second joint members 1 and 2, ensuring their reliability.

[0046] In some embodiments, the second seam member 2 also includes a second self-deforming plate 201, all second baffles 202 are located on the front side of the second self-deforming plate 201, and the second self-deforming plates 201 and the second baffles 202 are arranged opposite each other in sequence from back to front and are connected to each other at one end and not connected at the other end, so that second slots 203 are formed between adjacent second self-deforming plates 201 and second baffles 202 and between adjacent second baffles 202.

[0047] A second baffle 202 is inserted into each first slot 103, and a first baffle 102 is inserted into each second slot 203, so that the first baffles 102 and the second baffles 202 are alternately arranged in the front-to-back direction, and the first self-deforming plate 101 is located at the frontmost position and the second self-deforming plate 201 is located at the rearmost position.

[0048] When the inter-joint structure 1000 of the nuclear fusion cold shield enters a low-temperature working environment from a normal temperature environment, the first self-deforming plate 101 deforms from its initial position toward the adjacent second baffle 202 due to the temperature drop, and the second self-deforming plate 201 deforms from its initial position toward the adjacent first baffle 102 due to the temperature drop.

[0049] In the inter-joint structure 1000 for the nuclear fusion cold shield of this embodiment, on the one hand, at room temperature, the width of the first slot 103 of the first joint member 1 can be designed to meet the required size for convenient installation and insertion of the second baffle 202 of the second joint member 2, and the width of the second slot 203 of the second joint member 2 can be designed to meet the required size for convenient installation and insertion of the first baffle 102 of the first joint member 1. In this way, after the first joint member 1 is fixed to the first cold shield 3 and the second joint member 2 is fixed to the second cold shield 4, when the first cold shield 3 and the second cold shield 4 are installed end to end, the first joint member 1 and the second joint member 2 are inserted into each other without contact, that is, a second baffle 202 is inserted into each first slot 103, and a first baffle 102 is inserted into each second slot 203. As a result, the first baffles 102 and the second baffles 202 are alternately staggered in the front-to-back direction, with the first self-deforming plate 101 located at the frontmost position and the second self-deforming plate 201 located at the rearmost position, thereby facilitating installation. On the other hand, since the first self-deforming plate 101 is provided on the front side of the first joint member 1 and the second self-deforming plate 201 is provided on the rear side of the second joint member 2, when the inter-joint structure 1000 of the nuclear fusion cold shield enters the low-temperature working environment from the normal temperature environment, the first self-deforming plate 101 is deformed from the initial position toward the adjacent second baffle 202 due to the temperature drop, so that the distance between the deformed part of the first self-deforming plate 101 and the adjacent second baffle 202 in the low-temperature working environment becomes smaller than the distance between the first self-deforming plate 101 and the adjacent second baffle 202 in the initial position at normal temperature, thereby effectively reducing Due to the heat radiation from the gap between the first and second seams 1 and 2, the second self-deforming plate 201 deforms from its initial position toward the adjacent first baffle 102 due to the decrease in temperature. This results in a smaller distance between the deformed portion of the second self-deforming plate 201 and the adjacent first baffle 102 in the low-temperature operating environment than between the second self-deforming plate 201 and the adjacent first baffle 102 in its initial position at room temperature. This effectively reduces the heat radiation from the gap between the first and second seams 1 and 2, thereby effectively improving the thermal shielding effect of the cold screen and ensuring the normal operation of the low-temperature system of the nuclear fusion device. Furthermore, the passive deformation of the first self-deforming plate 101 of the first seam 1 and the second self-deforming plate 201 of the second seam 2 due to the decrease in ambient temperature eliminates the need for active deformation, simplifying the structures of the first and second seams 1 and 2 and ensuring their reliability.

[0050] In some embodiments, one end of the first baffle 102 is connected and fixed to the first connecting end 104, one end of the first self-deforming plate 101 is fixed to the first connecting end 104, and the first connecting end 104 is fixed to the first cold shield 3. Therefore, the first seam 1 has a simple and reliable structure.

[0051] One end of the second baffle 202 is connected and fixed to the second connecting end 204. One end of the second self-deforming plate 201 is fixed to the second connecting end 204. The second connecting end 204 is fixed to the first cold shield 3. Therefore, the second seam member 2 has a simple and reliable structure.

[0052] In some embodiments, the materials of the first baffle 102 and the first connecting end 104, the materials of the second baffle 202 and the second connecting end 204, and the materials of the first cold shield 3 and the second cold shield 4 are all the same; thus, the material properties of the first baffle 102, the first connecting end 104, the second baffle 202, the second connecting end 204, the first cold shield 3, and the second cold shield 4 are consistent. Specifically, the first baffle 102, the first connecting end 104, the second baffle 202, the second connecting end 204, the first cold shield 3, and the second cold shield 4 are all made of stainless steel, which has a low thermal expansion coefficient.

[0053] In some embodiments, the first baffle 102 and the first connecting end 104 are integrally formed, and the second baffle 202 and the second connecting end 204 are integrally formed. In this way, the first seam 1 and the second seam 2 are easy to process.

[0054] In some embodiments, the first self-deforming plate 101 includes a first inner plate 1011 and a first outer plate 1012 attached to the outer surface of the first inner plate 1011. The thermal expansion coefficient of the material of the first inner plate 1011 is greater than the thermal expansion coefficient of the material of the first outer plate 1012. Thus, when the inter-seam structure 1000 of the nuclear fusion cold shield moves from a normal temperature environment to a low-temperature operating environment, the first self-deforming plate 101 is facilitated to deform from its initial position toward the adjacent second baffle 202 due to the decrease in temperature. As a result, the distance between the deformed portion of the first self-deforming plate 101 and the adjacent second baffle 202 in the low-temperature operating environment is reduced relative to the distance between the first self-deforming plate 101 and the adjacent second baffle 202 in the initial position at normal temperature, thereby effectively reducing heat radiation from the gap between the first seam 1 and the second seam 2.

[0055] The second self-deforming plate 201 includes a second inner plate 2011 and a second outer plate 2012 attached to the outer surface of the second inner plate 2011. The thermal expansion coefficient of the material of the second inner plate 2011 is greater than that of the material of the second outer plate 2012. The thermal expansion coefficient of the material of the second outer plate 2012 is also greater than that of the material of the second baffle 202 and the second connecting end 204. Thus, when the inter-seam structure 1000 of the nuclear fusion cold shield moves from a normal temperature environment to a low-temperature operating environment, the second self-deforming plate 201 is facilitated to deform from its initial position toward the adjacent first baffle 102 due to a decrease in temperature. This reduces the distance between the deformed portion of the second self-deforming plate 201 and the adjacent first baffle 102 in the low-temperature operating environment relative to the distance between the second self-deforming plate 201 and the adjacent first baffle 102 in its initial position at normal temperature, thereby effectively reducing heat radiation from the gap between the first seam 1 and the second seam 2.

[0056] In some embodiments, the first inner plate 1011 is made of lead and the first outer plate 1012 is made of nickel. Thus, when the nuclear fusion cold shield inter-seam structure 1000 enters a low-temperature operating environment from a normal temperature environment, the first self-deforming plate 101 is facilitated to deform from its initial position toward the adjacent second baffle 202 due to the decrease in temperature. As a result, the distance between the deformed portion of the first self-deforming plate 101 and the adjacent second baffle 202 in the low-temperature operating environment is reduced relative to the distance between the first self-deforming plate 101 and the adjacent second baffle 202 in the initial position at normal temperature, thereby effectively reducing heat radiation at the gap between the first seam member 1 and the second seam member 2.

[0057] In some embodiments, the second inner plate 2011 is made of lead and the second outer plate 2012 is made of nickel. Thus, when the nuclear fusion cold shield inter-seam structure 1000 enters a low-temperature operating environment from a normal temperature environment, the second self-deforming plate 201 is facilitated to deform from its initial position toward the adjacent first baffle 102 due to the decrease in temperature. As a result, the distance between the deformed portion of the second self-deforming plate 201 and the adjacent first baffle 102 in the low-temperature operating environment is reduced relative to the distance between the second self-deforming plate 201 and the adjacent first baffle 102 in its initial position at normal temperature, thereby effectively reducing heat radiation at the gap between the first seam member 1 and the second seam member 2.

[0058] In some embodiments, the longitudinal cross-section of the first self-deforming plate 101 includes a first semi-circular arc connecting segment 1013 and a first straight segment 1014, the concave side of the first semi-circular arc connecting segment 1013 faces the second seam member 2, one end of the first semi-circular arc connecting segment 1013 is connected to the outer end surface of the first connecting end portion 104, and the other end of the first semi-circular arc connecting segment 1013 is connected to one end of the first straight segment 1014. By setting the first semi-circular arc connecting section 1013, since the thermal expansion coefficient of the material of the first inner layer plate 1011 of the first semi-circular arc connecting section 1013 is greater than the thermal expansion coefficient of the material of the first outer layer plate 1012, after cooling, the shrinkage deformation of the first inner layer plate 1011 of the first semi-circular arc connecting section 1013 is greater than the shrinkage deformation of the first outer layer plate 1012, so that the first straight section 1014 tilts while cooling and shrinking, and effectively increases the deformation displacement of the other end of the first straight section 1014 when the first self-deforming plate 101 cools and shrinks, so that the other end of the first straight section 1014 is significantly closer to the adjacent second baffle 202, and then the distance between the other end of the first straight section 1014 and the adjacent second baffle 202 is greatly reduced, thereby effectively reducing the heat radiation at the gap between the first seam 1 and the second seam 2.

[0059] The longitudinal cross-section of the second self-deforming plate 201 includes a second semicircular connecting segment 2013 and a second straight segment 2014. The concave side of the second semicircular connecting segment 2013 faces the first seam member 1. One end of the second semicircular connecting segment 2013 is connected to the outer end surface of the second connecting end portion 204, and the other end of the second semicircular connecting segment 2013 is connected to one end of the second straight segment 2014. The provision of the second semicircular connecting segment 2013 effectively increases the deformation displacement of the other end of the second straight segment 2014 when the second self-deforming plate 201 cools and contracts. Since the thermal expansion coefficient of the material of the second inner layer plate 2011 of the second semicircular arc connecting section 2013 is greater than the thermal expansion coefficient of the material of the second outer layer plate 2012, after cooling, the shrinkage deformation of the second inner layer plate 2011 of the second semicircular arc connecting section 2013 is greater than the shrinkage deformation of the second outer layer plate 2012, so that the second straight section 2014 tilts while cooling and shrinking, and effectively increases the deformation displacement of the other end of the second straight section 2014 when the second self-deforming plate 201 cools and shrinks, so that the other end of the second straight section 2014 is significantly closer to the adjacent first baffle 102, and thus the distance between the other end of the second straight section 2014 and the adjacent first baffle 102 is greatly reduced, effectively reducing the heat radiation at the gap between the first seam 1 and the second seam 2.

[0060] In some embodiments, the depth of the first slots 103 between adjacent first self-deforming plates 101 and first baffles 102 is greater than the depth of the remaining first slots 103. The length of the second baffle 202 in the first slots 103 between adjacent first self-deforming plates 101 and first baffles 102 is greater than the length of the remaining second baffles 202. The other end surface of the second baffle 202 in the first slots 103 between adjacent first self-deforming plates 101 and first baffles 102 is flush with or close to the outer end surface of the first connecting end 104. The length of the first straight section 1014 is greater than the length of all first baffles 102, and the other end surface of the first straight section 1014 is flush with or close to the outer end surface of the second connecting end 204. This can effectively reduce heat radiation from the gap between the first seam 1 and the second seam 2, further enhance the heat shielding effect of the cold screen, and improve the appearance.

[0061] The depth of the second slots 203 between adjacent second self-deforming plates 201 and second baffles 202 is greater than the depth of the remaining second slots 203. The length of the first baffle 102 in the second slots 203 between adjacent second self-deforming plates 201 and second baffles 202 is greater than the length of the remaining first baffles 102. The other end surface of the first baffle 102 in the second slots 203 between adjacent second self-deforming plates 201 and second baffles 202 is flush with or close to the outer end surface of the second connecting end 204. The length of the second straight section 2014 is greater than the length of all second baffles 202, and the other end surface of the second straight section 2014 is flush with or close to the outer end surface of the first connecting end 104. This effectively reduces heat radiation from the gap between the first seam 1 and the second seam 2, further enhancing the heat shielding effect of the cold screen and improving its appearance.

[0062] In some embodiments, as Figures 4 to 7As shown, the front side of the cross section of the second baffle plate 202 close to the first self-deforming plate 101 is the second arch convex edge 2021, and the front side and rear side of the cross section of the first self-deforming plate 101 are both the first straight edge 1015; the front side of the cross section of the first baffle plate 102 close to the second self-deforming plate 201 is the first arch convex edge 1021, and the front side and rear side of the cross section of the second self-deforming plate 201 are both the second straight edge 2015. When the inter-joint structure 1000 of the nuclear fusion cold shield of this embodiment enters a low-temperature working environment from a normal temperature environment, the first straight section 1014 of the first self-deforming plate 101 cools and contracts while tilting, so that the other end of the first straight section 1014 approaches the adjacent second baffle 202. At the same time, the deformation of the left and right sides of the first self-deforming plate 101 is greater than the deformation of its middle position in the left-right direction, thereby making the cross-section of the first straight section 1014 present an outwardly convex arch, which can match closely with the second arched edge 2021; the second straight section 2014 of the second self-deforming plate 201 cools and contracts while tilting, so that the other end of the second straight section 2014 approaches the adjacent first baffle 102. At the same time, the deformation of the left and right sides of the second self-deforming plate 201 is greater than the deformation of its middle position in the left-right direction, thereby making the cross-section of the second straight section 2014 present an outwardly convex arch, which can match closely with the first arched edge 1021. In this way, the heat radiation at the gap between the first seam member 1 and the second seam member 2 can be better reduced, and the heat shielding effect of the cold screen can be further improved.

[0063] It should be noted that, in order to achieve better heat radiation shielding effect of the joint between the cold screens, factors such as the shape, size and material of the first arch convex edge 1021 and the second arch convex edge 2021 need to be determined according to the specific deformation amount.

[0064] In some embodiments, the number of first baffles 102 is the same as the number of second baffles 102, and both are 1 to 3. This provides a simple structure for the first joint member 1 and the second baffle member 202, making installation easy. Preferably, the number of first baffles 102 and the number of second baffles 202 are 2. The present invention also provides a nuclear fusion device.

[0065] The nuclear fusion device according to an embodiment of the present invention includes the nuclear fusion cold shield inter-seam structure 1000 according to the above-mentioned embodiment of the present invention.

[0066] Since the nuclear fusion device of the embodiment of the present invention adopts the nuclear fusion cold shield inter-joint structure 1000 of the embodiment of the present invention, the nuclear fusion device of the embodiment of the present invention has basically the same technical effects as the nuclear fusion cold shield inter-joint structure 1000 of the embodiment of the present invention.

[0067] Throughout this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicate that the specific features, structures, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0068] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A nuclear fusion cold shield inter-joint structure, characterized in that: comprising a first seam member and a second seam member disposed between adjacent first and second cold screens spaced end to end; One end of the first seam is fixed to the first cold shield, the first seam includes a first self-deformable plate and at least one first baffle located behind the first self-deformable plate, the first self-deformable plate and the first baffle are arranged face to face from front to back and are connected to each other at one end and not connected to each other at the other end, so that first slots are formed between adjacent first self-deformable plates and first baffles and between adjacent first baffles respectively; One end of the second seam is fixed to the second cold shield, and the second seam includes second baffles. The number of the second baffles corresponds to the number of the first slots, and one second baffle is inserted into each first slot, so that the first baffles and the second baffles are alternately staggered in the front-to-back direction and the first self-deforming plate is located at the frontmost position; the second seam does not contact the first seam; When the inter-joint structure of the nuclear fusion cold shield enters a low-temperature working environment from a normal temperature environment, the first self-deforming plate deforms from its initial position toward the adjacent second baffle due to a decrease in temperature.

2. The inter-joint structure of the nuclear fusion cold shield according to claim 1, characterized in that: The second seam member further includes a second self-deforming plate, all second baffles are located in front of the second self-deforming plate, the second self-deforming plates and the second baffles are arranged face to face in sequence from back to front, one end of the second self-deforming plates is connected to each other and the other end is not connected, so that second slots are formed between adjacent second self-deforming plates and second baffles and between adjacent second baffles respectively; One of the first baffles is inserted into each of the second slots, so that the first baffles and the second baffles are alternately staggered in the front-to-back direction, and the first self-deforming plate is located at the frontmost position and the second self-deforming plate is located at the rearmost position; When the inter-joint structure of the nuclear fusion cold shield enters a low-temperature working environment from a normal temperature environment, the first self-deforming plate deforms from its initial position toward the adjacent second baffle due to the temperature drop, and the second self-deforming plate deforms from its initial position toward the adjacent first baffle due to the temperature drop.

3. The inter-joint structure of the nuclear fusion cold shield according to claim 2, characterized in that: One end of the first baffle is connected and fixed to the first connecting end portion, one end of the first self-deforming plate is fixed to the first connecting end portion, and the first connecting end portion is fixed to the first cold shield; One end of the second baffle is connected and fixed to the second connecting end portion, one end of the second self-deforming plate is fixed to the second connecting end portion, and the second connecting end portion is fixed to the first cold shield.

4. The inter-joint structure of the nuclear fusion cold shield according to claim 3, characterized in that: The materials of the first baffle and the first connecting end, the materials of the second baffle and the second connecting end, and the materials of the first cold shield and the second cold shield are all the same.

5. The inter-joint structure of the nuclear fusion cold shield according to claim 4, characterized in that: The first self-deforming plate includes a first inner plate and a first outer plate attached to an outer surface of the first inner plate, wherein the thermal expansion coefficient of the material of the first inner plate is greater than the thermal expansion coefficient of the material of the first outer plate; The second self-deforming plate includes a second inner plate and a second outer plate attached to an outer surface of the second inner plate. The thermal expansion coefficient of the material of the second inner plate is greater than the thermal expansion coefficient of the material of the second outer plate.

6. The inter-joint structure of the nuclear fusion cold shield according to claim 5, characterized in that: The first inner plate is made of lead and the first outer plate is made of nickel.

7. The inter-joint structure of the nuclear fusion cold shield according to claim 5, characterized in that: The second inner plate is made of lead and the second outer plate is made of nickel.

8. The inter-joint structure of the nuclear fusion cold shield according to claim 5, characterized in that: The longitudinal cross-section of the first self-deforming plate includes a first semicircular arc connecting segment and a first straight segment, the concave side of the first semicircular arc connecting segment faces the second seam member, one end of the first semicircular arc connecting segment is connected to the outer end surface of the first connecting end portion, and the other end of the first semicircular arc connecting segment is connected to one end of the first straight segment; The longitudinal cross-section of the second self-deforming plate includes a second semicircular arc connecting segment and a second straight segment, the concave side of the second semicircular arc connecting segment faces the first seam member, one end of the second semicircular arc connecting segment is connected to the outer end surface of the second connecting end portion, and the other end of the second semicircular arc connecting segment is connected to one end of the second straight segment.

9. The inter-joint structure of the nuclear fusion cold shield according to claim 8, characterized in that: The groove depth of the first slot between adjacent first self-deformable plates and first baffles is greater than the groove depth of the remaining first slots, the length of the second baffle in the first slot between adjacent first self-deformable plates and first baffles is greater than the length of the remaining second baffles, and the other end surface of the second baffle in the first slot between adjacent first self-deformable plates and first baffles is flush with or close to the outer end surface of the first connecting end portion, the length of the first straight segment is greater than the length of all the first baffles, and the other end surface of the first straight segment is flush with or close to the outer end surface of the second connecting end portion; the groove depth of the second slot between adjacent second self-deformable plates and second baffles is greater than the groove depth of the remaining second slots, the length of the first baffle in the second slot between adjacent second self-deformable plates and second baffles is greater than the length of the remaining first baffles, and the other end surface of the first baffle in the second slot between adjacent second self-deformable plates and second baffles is flush with or close to the outer end surface of the second connecting end portion, the length of the second straight segment is greater than the length of all the second baffles, and the other end surface of the second straight segment is flush with or close to the outer end surface of the first connecting end portion.

10. The inter-joint structure of the nuclear fusion cold shield according to claim 8, characterized in that: The front side of the cross-section of the second baffle plate near the first self-deforming plate is a second arched edge, and the front side and rear side of the cross-section of the first self-deforming plate are both first straight edges; the front side of the cross-section of the first baffle plate near the second self-deforming plate is a first arched edge, and the front side and rear side of the cross-section of the second self-deforming plate are both second straight edges.

11. A nuclear fusion device, characterized in that: The invention comprises the inter-seam structure of the nuclear fusion cold shield as described in any one of claims 1 to 10.

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