Support structure for bottom cold shield main cooling tube of nuclear fusion device

Abstract

This invention relates to the field of fusion device technology, and provides a support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device. The structure includes: a support body connected to the bottom cold screen; multiple first fixing members disposed on the support body, each first fixing member having a first groove on its top side; multiple second fixing members correspondingly covering the first fixing members, each second fixing member having a second groove on its side facing the first fixing member; the second grooves and the first grooves forming a fixing hole for the main cooling pipe of the cold screen to pass through. The support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device provided by this invention can support and protect the main cooling pipe of the bottom cold screen, while isolating the mutual thermal influence between the main cooling pipes, reducing electromagnetic conduction between the bottom cold screen base plate and the bottom cold screen side plate, facilitating installation, being adjustable, and structurally stable.

Description

Technical Field

[0001] This invention relates to the field of fusion device technology, and in particular to a support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device. Background Technology

[0002] In a tokamak nuclear fusion device, the primary function of the cold shield is to isolate the thermal radiation from high-temperature components from low-temperature components, ensuring their proper operation within their respective low-temperature environments. Tube-plate cold shields require a main cooling pipe and multiple branch pipes to supply cooling media to various sectors of the cold shield. The main cooling pipe consists of four pipes: an inlet pipe, an outlet pipe, and a spare pipe. In the bottom cold shield area, the main cooling pipe needs to be placed between the bottom side plate and the bottom plate, thus requiring a support structure. Due to the relatively large overall ring size of the main cooling pipe in the bottom cold shield, considering machining and installation errors, using a conventional support structure might prevent the main cooling pipe from being properly installed and secured. Therefore, an adjustable support structure suitable for the main cooling pipe in the bottom cold shield is needed. Summary of the Invention

[0003] This invention provides a support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device, which solves the problem that in the prior art, the main cooling pipe of the bottom cold screen has a large overall ring shape, and considering the processing and installation errors, the use of ordinary support structures may lead to the main cooling pipe not being able to be installed and fixed properly.

[0004] This invention provides a support structure for the main cooling pipe of the bottom cold shield of a nuclear fusion device, comprising:

[0005] Support the main body and connect it to the bottom cold screen;

[0006] Multiple first fasteners are disposed on the support body, and the top side of each first fastener is provided with a first groove;

[0007] Multiple second fasteners are detachably mounted on the first fastener, one to one, and each second fastener has a second groove on the side facing the first fastener; the second groove and the first groove form a fixing hole for the main cooling pipe of the cold screen to pass through; wherein the axis of the fixing hole extends along the axis of the main cooling pipe of the cold screen.

[0008] According to the present invention, a support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device further includes a sleeve disposed inside the fixing hole.

[0009] According to the present invention, a support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device is provided, wherein the sleeve is made of heat-insulating material and the outer wall surface of the sleeve is provided with a protruding structure.

[0010] According to the present invention, a support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device is provided, wherein the sleeve is configured as a split type, and the sleeve comprises:

[0011] The first arc-shaped plate is disposed on the inner side of the first fixing member;

[0012] The second arc-shaped plate is disposed inside the second fixing member, and the opening sides of the second arc-shaped plate and the first arc-shaped plate are disposed opposite to each other.

[0013] According to the present invention, a support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device is provided, the support body comprising:

[0014] Support side panel, which is connected to the flange of the bottom cold screen side panel;

[0015] The first support plate and the second support plate are arranged in parallel, and one side of both the first support plate and the second support plate is connected to the support side plate; the first fixing member is provided at the top of the first support plate; the second fixing member is provided at the bottom of the second support plate.

[0016] The leg support is connected to the bottom edge of the bottom cold screen base plate, and the top of the leg support is connected to the first support cross plate.

[0017] According to the present invention, a support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device is provided, wherein a first mounting groove is provided on the first support horizontal plate along a first direction, and a plurality of first fixing members are distributed on the first mounting groove; a second mounting groove is provided on the second support horizontal plate along the first direction, and a plurality of second fixing members are distributed on the second mounting groove.

[0018] According to the present invention, a support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device is provided, wherein the first fixing member includes:

[0019] A base plate is connected to the first supporting horizontal plate; a fan-shaped hole is provided on the base plate;

[0020] The first side plates are arranged in pairs and are both perpendicularly disposed on the base plate; the top side of the first side plate is arc-shaped to form the first groove;

[0021] Fasteners, corresponding to the first mounting groove and the fan-shaped hole, are used to fasten the first support cross plate and the base plate.

[0022] According to the support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device provided by the present invention, the first fixing member further includes:

[0023] The second side plate is disposed opposite to the other two sides of the base plate, and the middle part of the second side plate is hollow.

[0024] According to the present invention, an insulating gasket is provided between the first support plate and the leg support of a nuclear fusion device bottom cold screen main cooling pipe.

[0025] The support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device provided by the present invention further includes:

[0026] A telescopic structure is used to connect the first support plate and the leg support.

[0027] The support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device provided by the present invention is connected to the bottom cold screen through a support body. Multiple first fixing members are disposed on the support body, and the top side of the first fixing member is provided with a first groove. Multiple second fixing members are correspondingly disposed on the first fixing members, and each second fixing member is provided with a second groove on the side facing the first fixing member. The second groove and the first groove form a fixing hole for the main cooling pipe of the cold screen to pass through. The fixing hole covers the outer periphery of the main cooling pipe of the cold screen, providing support and protection for the main cooling pipe of the cold screen. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of the support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device provided by the present invention.

[0030] Figure 2 This is a schematic diagram showing the usage state of the support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device provided by the present invention.

[0031] Figure 3 This is a schematic diagram of the sleeve provided by the present invention.

[0032] Figure 4 This is a schematic diagram showing the connection between the support side plate, the first support cross plate, and the leg support provided by the present invention.

[0033] Figure 5 This is a schematic diagram of the structure of the second support plate provided by the present invention.

[0034] Figure 6 This is a structural schematic diagram of the first and second fasteners provided by the present invention.

[0035] Figure 7 This is a top view of the first fastener provided by the present invention after the fasteners have been removed.

[0036] Figure 8 This is a schematic diagram of the structure of the first fixing member provided by the present invention after its position is adjusted through the fan-shaped hole.

[0037] Figure label:

[0038] 1. Support body; 2. First fixing component; 3. Second fixing component; 4. Sleeve; 5. Telescopic structure; 100. Main cooling pipe of the cold shield;

[0039] 101. Support side plate; 102. First support horizontal plate; 103. Second support horizontal plate; 104. Leg support; 105. First mounting slot; 106. Second mounting slot;

[0040] 201. Base plate; 2011. Fan-shaped hole; 202. First side plate; 203. Fastener; 204. Second side plate;

[0041] 401. Protruding structure; 402. First arc-shaped plate; 403. Second arc-shaped plate. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0043] The following is combined Figures 1-8 The support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device provided in the embodiment of the present invention includes a support body 1, a plurality of first fixing members 2 and a plurality of second fixing members 3.

[0044] Among them, such as Figure 1-3 As shown, the support body 1 is connected to the bottom cold screen (not shown in the figure), providing a stable installation foundation for the entire support structure. This ensures that the support structure can be reliably fixed on the bottom cold screen, avoiding damage to the cold screen structure due to stress concentration, and guaranteeing the stability and load-bearing capacity of the overall structure.

[0045] Multiple first fixing parts 2 are set on the support body 1, and the top side of the first fixing part 2 is provided with a first groove, which provides initial positioning and support for the main cooling pipe 100 of the cold screen, simplifies the installation process, and the workers can directly place the main cooling pipe in the groove without suspending it before tightening, thereby improving assembly efficiency and reducing construction difficulty.

[0046] Multiple second fixing members 3 are detachably mounted on the first fixing member 2, each with a second groove on the side facing the first fixing member 2. The second groove and the first groove form a fixing hole for the main cooling pipe of the cooling screen to pass through, and the axis of the fixing hole extends along the axis of the main cooling pipe of the cooling screen. The outline of the fixing hole fits tightly against the outer wall of the main cooling pipe, and the fixing hole can firmly clamp and lock the main cooling pipe in a predetermined position, effectively preventing the pipe from shifting or shaking due to thermal expansion and contraction or vibration during operation. This ensures the stability and reliability of the cooling pipeline system, avoids the risk of damage caused by fatigue stress, and thus ensures the long-term stability and reliability of the cooling pipeline system.

[0047] It should be noted that the second fastener 3 and the first fastener 2 can be fastened with bolts or other fastening methods to ensure a stable connection between the second fastener 3 and the first fastener 2.

[0048] In a feasible embodiment of the present invention, a sleeve 4 is further included. The sleeve 4 is disposed inside the fixing hole and protects the cooling pipe, avoiding direct hard contact between the main cooling pipe and the supporting structure. It also prevents wear and scratches caused by relative sliding during relative movement. When a low-temperature working fluid is introduced into the main cooling pipe of the cold screen, the temperature drops to approximately 80K, causing the entire annular cooling pipe to contract inward. Although the bottom cold screen as a whole contracts inward due to cooling, the contraction of the supporting structure driven by the bottom cold screen is not completely synchronized with the contraction of the cooling pipe, resulting in relative displacement. Therefore, the sleeve 4 is needed to protect the main cooling pipe of the cold screen. The sleeve 4 forms a sliding buffer layer between the main cooling pipe and the fixing hole, allowing the main cooling pipe to slide slightly axially within it. This absorbs and alleviates the stress caused by asynchronous contraction, preventing stress concentration at a single point in the pipe or supporting structure, and thus preventing fatigue damage or deformation of the pipe due to thermal stress.

[0049] Due to repeated cooling and heating during operation, sleeve 4 needs to be embedded in the fixing hole to prevent the main cooling pipe of the cold screen from moving laterally and detaching from the support structure, thus ensuring the safety of the system.

[0050] In other embodiments, the sleeve 4 can also be replaced by an elastic gasket, which is also disposed inside the fixing hole and is made of a material that can maintain good elasticity in low-temperature environments, such as special rubber.

[0051] More specifically, sleeve 4 adopts a cylindrical structure with an annular cross-section, which facilitates the support of the main cooling pipe of the cold screen.

[0052] Furthermore, sleeve 4 is made of glass fiber resin. Glass fiber has a certain structural strength, which can support the main cooling pipe of the cold shield. It is sufficient to withstand the weight of the main cooling pipe and the dynamic load that may be generated during operation, thus providing stable and reliable support for the main cooling pipe. At the same time, it also has a certain buffering effect, which can absorb some of the energy caused by temperature difference contraction or mechanical vibration, and avoid damage to the main cooling pipe caused by rigid impact.

[0053] Glass fiber resin possesses excellent thermal insulation properties. Its thermal conductivity is significantly lower than that of metallic materials. In cooling systems, the low-temperature inlet pipe and the high-temperature outlet pipe after heat exchange often need to be placed side-by-side on the same support structure. The presence of sleeve 4 effectively creates a highly efficient thermal barrier between the two pipes, reducing the heat transfer from the higher-temperature outlet pipe to the lower-temperature inlet pipe through the support structure. This protects the cooling capacity of the low-temperature working fluid in the inlet pipe from being wasted, thus avoiding a decrease in cooling efficiency due to unnecessary temperature rise and ensuring the full utilization of the system's cooling capacity.

[0054] like Figure 3 As shown, further, the outer wall surface of the sleeve 4 is provided with a protruding structure 401, which is also made of elastic rubber. When the sleeve 4 is subjected to compression caused by thermal expansion and contraction or vibration, these rubber protrusions will undergo elastic deformation, thereby absorbing and dissipating energy and enhancing the buffering effect of the entire sleeve 4. The protruding structure 401 can not only better adapt to the tolerance fit during installation, but also provide the necessary deformation space for subsequent buffering effect.

[0055] The protruding structure 401 can be arc-shaped, multiple point-like structures, or multiple discontinuous elongated structures; no specific limitation is made here. Preferably, choosing an elongated structure can better resist axial movement and achieve targeted vibration reduction and buffering optimization.

[0056] like Figure 3 As shown, in a feasible embodiment of the present invention, the sleeve 4 is configured as a split type, which simplifies the installation and maintenance process, because the operator does not need to pass the long and bulky main cooling pipe completely through one end of the sleeve, but can install the sleeve after the pipe is in place.

[0057] The sleeve 4 includes a first arc-shaped plate 402 and a second arc-shaped plate 403. The first arc-shaped plate 402 is disposed inside the first fixing member 2; the second arc-shaped plate 403 is disposed inside the second fixing member 3. Through the above arrangement, the installation of the sleeve 4 and the assembly of the support structure itself can be carried out simultaneously, ensuring the precise alignment of the upper and lower arc-shaped plates when they are closed, avoiding additional adjustment steps during the installation process, and improving the accuracy and efficiency of the assembly.

[0058] The second arc-shaped plate 403 and the first arc-shaped plate 402 are arranged opposite each other on their open sides. The space enclosed by the open sides of the second arc-shaped plate 403 and the first arc-shaped plate 402 is used to fix the main cooling pipe of the cold screen. While providing all-round protection and support, it is more convenient to operate. Especially when inspecting or replacing the sleeve of the installed pipeline, the sleeve 4 can be easily removed or installed by simply removing the second fixing part 3 above, without having to disassemble the entire pipeline system on a large scale, which reduces the difficulty and cost of maintenance.

[0059] like Figure 1 , Figure 4 and Figure 5 As shown, in a feasible embodiment of the present invention, the support body 1 includes a support side plate 101, a first support horizontal plate 102, a second support horizontal plate 103, and a leg support 104. The support side plate 101 is connected to the bottom cold screen side plate by a flange. The cold screen side plate has a ring structure and is fixed by utilizing the ring structure of the cold screen itself, providing reliable lateral support and positioning reference. Fixing the support structure to the cold screen side plate can utilize the ring structure of the cold screen itself for fixation. This is equivalent to anchoring the support structure to a very stable large base, thereby providing reliable lateral support and precise positioning reference for the entire support structure, effectively resisting lateral vibration and impact.

[0060] The first support plate 102 and the second support plate 103 are arranged in parallel, and one side of both the first support plate 102 and the second support plate 103 is connected to the support side plate 101; thus forming a sturdy "U"-shaped frame structure. This frame provides a stable platform for installing fasteners and ensures the parallelism and relative position accuracy between the upper and lower horizontal plates.

[0061] The top of the first supporting horizontal plate 102 is provided with a first fixing member 2; the bottom of the second supporting horizontal plate 103 is provided with a second fixing member 3; the bottom of the leg support 104 is connected to the flange of the bottom cold screen base plate, and the top of the leg support 104 is connected to the first supporting horizontal plate 102. The leg support 104 forms a vertical load-bearing path, transferring the weight of the main cooling pipe and the upper part of the support structure to the bottom cold screen base plate, thereby enhancing the rigidity and vibration resistance of the first supporting horizontal plate 102. By transferring the weight of the main cooling pipe and the upper part of the support structure to the bottom cold screen base plate with the strongest load-bearing capacity through the shortest path, the rigidity and bending resistance of the first supporting horizontal plate 102, which acts as a cantilever beam, are enhanced, effectively suppressing its sagging and vibration under load, thus ensuring the long-term stability of the elevation position of the main cooling pipe.

[0062] As an alternative embodiment, the support body can also adopt an integrated stamped bracket structure. During the stamping process, reinforcing ribs or triangular reinforcing rib structures can be directly stamped at the connection between the vertical mounting surface and the horizontal support platform.

[0063] See you again Figure 1 As shown, in a feasible embodiment of the present invention, a first mounting groove 105 is provided on the first support plate 102 along the first direction, and a plurality of first fasteners 2 are distributed on the first mounting groove 105. The first mounting groove 105 provides better flexibility and adjustability for the installation position of the first fasteners 2, allowing for installation errors, that is, upgrading fixed-point installation to linear adjustable installation, providing flexibility and adjustability for the first fasteners 2 and the second fasteners 3.

[0064] The second support plate 103 has a second mounting groove 106 along the first direction, and multiple second fixing parts 3 are distributed on the second mounting groove 106. This ensures that when the position of the first fixing part 2 is adjusted, the corresponding second fixing part 3 can also slide to a suitable position on the second mounting groove 106, ensuring that the upper and lower combined second groove and the first groove can be aligned to form a reliable clamping fixing hole. This avoids misalignment caused by installation errors and ensures a stable fixing effect on the main cooling pipe.

[0065] During on-site assembly, even when faced with the cumulative manufacturing tolerances or installation errors of the bottom cold screen or main cooling pipe, workers do not need to perform additional drilling or calibration. They only need to slide the first fixing member 2 within the range of the first mounting groove 105, or slide the second fixing member 3 to the precise position within the orientation of the second mounting groove 106.

[0066] The first direction is the length direction of the first supporting horizontal plate 102.

[0067] like Figure 6 and Figure 7 As shown, in a feasible embodiment of the present invention, the first fastener 2 includes a base plate 201, a first side plate 202, and a fastener 203.

[0068] The base plate 201 is connected to the first support cross plate 102, ensuring the stability of the installation. The base plate 201 has fan-shaped holes 2011, improving the flexibility and tolerance of the installation, allowing for a certain degree of error. Figure 8 As shown, the first fixing member 2 is allowed to rotate and adjust at a certain angle in the horizontal plane, which can easily compensate for alignment deviations that may occur during manufacturing or on-site installation, and ensure the accuracy of installation.

[0069] The first side plates 202 are arranged in pairs and are both vertically mounted on the base plate 201. The symmetrical vertical structure forms a robust load-bearing frame, which can restrict the lateral displacement of the main cooling pipe of the cold screen from both sides, thereby enhancing the rigidity and stability of the support.

[0070] The top side of the first side plate 202 is arc-shaped to form a first groove. The first groove fits the cylindrical shape of the main cooling pipe of the cold screen, increasing the contact area and effectively dispersing the stress at the support point. This prevents stress concentration from causing pressure damage or injury to the pipe, providing a safe support base for the main cooling pipe of the cold screen. The fastener 203 passes through the first mounting groove 105 and the fan-shaped hole 2011, enabling adjustable fixing of the first fixing member 2 on the support body 1. By tightening the fastener 203, not only can the first fixing member 2 be firmly locked, but the sleeve 4 can also apply a final clamping force to the main cooling pipe.

[0071] More specifically, there are three first mounting slots 105. The first mounting slots 105 on both sides are used to cooperate with the fan-shaped holes 2011, allowing the first fastener 2 to have a certain installation error, improving the fault tolerance rate, and ultimately making the overall structure installation more stable.

[0072] In a feasible embodiment of the present invention, the first fixing member 2 further includes a second side plate 204, which is disposed opposite to the other two sides of the base plate 201. The second side plate 204, the first side plate 202, and the base plate 201 together constitute the first fixing member 2, making the structure of the first fixing member 2 stable. The middle part of the second side plate 204 is hollow, which not only reduces the weight of the entire support structure, but also allows the user to easily observe the working status of the internal components through the hollow part, improving the convenience of installation and maintenance.

[0073] Furthermore, the first side plate 202 and the second side plate 204 can be designed with openwork to reduce the mass of the supporting structure itself.

[0074] In a feasible embodiment of the present invention, insulating gaskets are provided between the first support plate 102 and the leg support 104, and between the first fixing member 2 and the second fixing member 3. The provision of insulating gaskets can reduce electromagnetic conduction between the bottom cold screen base plate and the bottom cold screen side plate.

[0075] In a feasible embodiment of the present invention, a telescopic structure 5 is further included for connecting the first support plate 102 and the leg support 104. The telescopic structure 5 can adjust the spacing to adapt to different installation requirements, reduce the impact of processing errors on installation, and make the leg support more stable. The telescopic direction of the telescopic structure 5 is along a second direction, which can be understood as the height direction perpendicular to the horizontal plane.

[0076] Specifically, the telescopic structure 5 can be a telescopic hydraulic cylinder, a telescopic pneumatic cylinder, or a screw and sleeve structure.

[0077] In summary, the support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device provided by the present invention can support and protect the main circuit of the bottom cold screen, while isolating the mutual thermal influence between the main circuits of the bottom cold screen and reducing the electromagnetic conduction between the bottom cold screen base plate and the bottom cold screen side plate; in addition, the sleeve 4 is set as a split structure, which is convenient for installation, adjustable, and the structure is more stable.

[0078] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A support structure for the main cooling pipe of the bottom cold screen of a nuclear fusion device, characterized in that, include: The support body (1) is connected to the bottom cold screen; the support body (1) includes a first support horizontal plate (102). Multiple first fixing members (2) are disposed on the support body (1), and the top side of the first fixing member (2) is provided with a first groove; the top of the first support horizontal plate (102) is provided with the first fixing member (2); the first support horizontal plate (102) is provided with a first mounting groove (105) along a first direction, and multiple first fixing members (2) are distributed on the first mounting groove (105); the first fixing member (2) includes a base plate (201) and a leg support (104), the base plate (201) is connected to the first support horizontal plate (102); the base plate (201) is provided with a fan-shaped hole (2011); the base plate (201) is connected to the first support horizontal plate (102); the bottom of the leg support (104) is connected to the bottom cold screen base plate flange, and the top of the leg support (104) is connected to the first support horizontal plate (102); Multiple second fasteners (3) are detachably mounted on the first fastener (2) in a corresponding manner, and each second fastener (3) has a second groove on the side facing the first fastener (2); the second groove and the first groove form a fixing hole for the main cooling pipe (100) of the cold screen to pass through; wherein, the axis of the fixing hole extends along the axis of the main cooling pipe (100) of the cold screen.

2. The support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device according to claim 1, characterized in that, It also includes a sleeve (4), which is disposed inside the fixing hole.

3. The support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device according to claim 2, characterized in that, The sleeve (4) is made of heat-insulating material, and the outer wall surface of the sleeve (4) is provided with a protruding structure (401).

4. The support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device according to claim 2 or 3, characterized in that, The sleeve (4) is configured as a split type, and the sleeve (4) includes: The first arc-shaped plate (402) is disposed on the inner side of the first fixing member (2); The second arc-shaped plate (403) is disposed on the inner side of the second fixing member (3), and the opening sides of the second arc-shaped plate (403) and the first arc-shaped plate (402) are disposed opposite to each other.

5. The support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device according to claim 2, characterized in that, The supporting body (1) includes: Support side panel (101) is connected to the flange of the bottom cold screen side panel; The second support plate (103) is arranged parallel to the first support plate (102), and one side of both the first support plate (102) and the second support plate (103) is connected to the support side plate (101); the bottom of the second support plate (103) is provided with the second fixing member (3).

6. The support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device according to claim 5, characterized in that, The second support plate (103) has a second mounting groove (106) along the first direction, and a plurality of second fasteners (3) are distributed on the second mounting groove (106).

7. The support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device according to claim 6, characterized in that, The first fastener (2) includes: The first side plates (202) are arranged in pairs and are both vertically arranged on the base plate (201); the top side of the first side plate (202) is arc-shaped to form the first groove; Fastener (203) passes through the first mounting groove (105) and the fan-shaped hole (2011) respectively. The fastener (203) is used to fasten the first support plate (102) and the base plate (201).

8. The support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device according to claim 7, characterized in that, The first fastener (2) further includes: The second side plate (204) is disposed on the other two sides of the bottom plate (201), and the middle part of the second side plate (204) is hollow.

9. The support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device according to any one of claims 5-8, characterized in that, An insulating pad is provided between the first support plate (102) and the leg support (104).

10. The support structure for the main cooling pipe of the bottom cold screen of the nuclear fusion device according to claim 9, characterized in that, Also includes: Telescopic structure (5) is used to connect the first support plate (102) and the leg support (104).

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