Auxiliary support mechanism for assembling internal components of tokamak and assembly method

Abstract

The auxiliary support mechanism and the assembly method for the internal components of the tokamak in the application are characterized in that all the auxiliary columns are installed at the equal center distance from the center column, the center column is provided with two layers of disc flower basket bolt support mechanisms to be connected with the outer surface of the vertical section of the vacuum chamber ring petals, further comprising an outer support mechanism connected around the outer surface of the vacuum chamber ring petals group and a double-column type bottom support platform located below the vacuum chamber ring petals group to support the vacuum chamber ring petals group from the outer side and the lower side of the vacuum chamber ring petals group respectively, the connecting rods are connected between the adjacent two auxiliary columns, the limiting mechanisms capable of extending into the window of the vacuum chamber ring petals are installed on the connecting rods, and the U-shaped operation platform passes through the vacuum chamber ring petals group, and the surface of the U-shaped operation platform is movably installed with a plurality of small internal component assembly auxiliary tools. The application has a wide range of applications, can effectively solve the problems of less internal component transportation channels and limited assembly construction space, and reduces the construction difficulty and the construction cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear fusion device installation, in particular to an auxiliary supporting mechanism for assembling internal components of a tokamak and an assembly method. BACKGROUND

[0002] Nuclear fusion energy is a new type of clean energy, and controlled nuclear fusion is an important field that is being actively researched and explored by countries around the world. Controlled nuclear fusion uses a device called a tokamak to confine high-temperature plasma, causing the plasma to undergo fusion reactions in a vacuum chamber, releasing enormous energy, which is then converted for human use.

[0003] A tokamak is composed of thousands of components, and its main vacuum chamber is a hollow ring-shaped closed structure similar to a doughnut, which is welded from multiple D-shaped ring petals. In order to facilitate processing and manufacturing, the vacuum chamber is divided into n petals for processing and manufacturing, (usually 8 or 9 petals), each petal is D-shaped, and each petal is named as 1 / n vacuum chamber. The assembly method is generally to sequentially hoist each petal of the vacuum chamber into the tokamak main pit for assembly and welding, and finally form a ring, and then transport and install the internal components. The vacuum chamber contains a large number of internal components, including divertors, blankets, fast control coils, passive feedback plates, etc. The types and quantities of internal components are relatively large, and smooth assembly of internal components is an important part of completing the construction of the tokamak main machine.

[0004] The assembly of the internal components of the vacuum chamber of the tokamak device is usually in the later stage of the overall assembly of the tokamak device main machine. After the vacuum chamber is ring-welded in the tokamak main pit, the internal components are sequentially assembled. During the assembly process, the internal components can only be transported into the vacuum chamber through the small-sized vacuum chamber window, and the available transportation channels are few. After the vacuum chamber is ringed, the available assembly operation space inside the vacuum chamber is limited, and a large number of large and heavy tooling equipment cannot be used, which increases the assembly construction difficulty and construction cost, resulting in slow overall progress of the tokamak main machine assembly.

[0005] In addition, the assembly method of assembling the internal components after the tokamak vacuum chamber is ringed is a series method. Since the internal components of the tokamak contain tens of thousands of components, the series assembly method has a long construction period. During the process, various transport tooling built outside the tokamak main machine occupies the construction space of other systems of the main machine, and the assembly of other systems needs to wait for the completion of the installation of the internal components before continuing, which further slows down the overall assembly progress of the tokamak main machine.

[0006] More specifically, the method for assembling the internal components of the tokamak has the upper window hoisting method, the middle window track method and the like; wherein the upper window hoisting method is mainly applied to large tokamak devices, and the assembly of the internal components is carried out after the vacuum chamber is formed into a ring, the method uses the upper window to directly hoist the internal components into the vacuum chamber, but requires that the upper window of the tokamak is large enough to pass all the internal components, and is not suitable for small tokamaks. The middle window track method is mainly applied to the international cooperation project ITER fusion experimental reactor, and the assembly of the internal components is also carried out after the vacuum chamber is formed into a ring, the internal components are transported through the track built in the middle window of the vacuum chamber, and most of the assembly auxiliary tools such as mechanical arms enter the vacuum chamber through the middle window of the vacuum chamber, the method has the advantages of not needing to consider the size of the upper window, and the various tools and equipment used in the assembly have high automation, but the assembly period is too long, and many kinds of high-cost automatic equipment need to be designed.

[0007] The assembly auxiliary tools and mechanisms used in the above method are built after the vacuum chamber is formed into a ring, and in the process of building and using, a large amount of space inside and outside the tokamak main machine is utilized, which occupies the installation positions of other components and systems of the main machine, so that the construction of other components cannot be carried out, and the overall assembly process of the tokamak main machine is slowed down. SUMMARY

[0008] In view of the above technical status, the purpose of the present application is to provide an auxiliary support mechanism and assembly method for assembling the internal components of a tokamak, which is suitable for the assembly of all torus-segment tokamak vacuum chambers, has a wide application range, can effectively solve the problems of few transportation channels of internal components and limited assembly construction space, reduces the construction difficulty and construction cost, thereby effectively improving the assembly efficiency and assembly quality of the internal components, and greatly speeds up the overall assembly progress of the tokamak main machine.

[0009] In order to achieve the above object, the auxiliary support mechanism for assembling the internal component of the tokamak comprises a center column and at least two auxiliary columns which are vertically installed, all the auxiliary columns are installed with equal center distance between the center column, the center column is provided with two layers of disc flower basket bolt support mechanism, the disc flower basket bolt support mechanism comprises a connecting disc which is coaxially installed on the outer surface of the center column, and a plurality of flower basket bolts which are connected in an annular array around the connecting disc, one end of the flower basket bolt is connected with the outer surface of the vertical section of the vacuum chamber ring segment, the mechanism further comprises an outer support mechanism which is connected around the outer surface of the vacuum chamber ring segment group and a double-column bottom support platform which is located below the vacuum chamber ring segment group, so as to support the vacuum chamber ring segment group from the outer side and the bottom of the vacuum chamber ring segment group respectively, the top ends of the two adjacent auxiliary columns are connected with the center column through an anti-toppling beam, and a pair of vertically arranged column connecting rods are connected between the two adjacent auxiliary columns, at least one column connecting rod in each pair of column connecting rods is provided with a limiting mechanism which can be inserted into the window of the vacuum chamber ring segment, the limiting mechanism is used for limiting the movement of the vacuum chamber in the circumferential direction.

[0010] The mechanism further comprises a U-shaped operation platform which is located in the horizontal plane, the U-shaped operation platform passes through the vacuum chamber ring segment group, the curved section of the U-shaped operation platform is located inside the vacuum chamber ring segment group, and the curvature of the curved section is consistent with the curvature of the vacuum chamber ring segment group in the splicing direction, a plurality of small internal component assembly auxiliary tools are movably installed on the U-shaped operation platform.

[0011] Further, the end of the flower basket bolt is fixed with a top connecting plate which is used for abutting connection with the outer surface of the vertical section.

[0012] Further, the bottom of the U-shaped operation platform is connected with a support leg which is installed at the bottom of the internal area of the vacuum chamber ring segment.

[0013] Further, one end of the anti-toppling beam is fixed through pin connection at the top center of the auxiliary column, the other end of the anti-toppling beam is fixed through pin connection at the top center of the center column, and the other end of the anti-toppling beam is in the shape of an isosceles triangular wedge structure, the inclined surfaces of the end portions of the two adjacent anti-toppling beams abut each other.

[0014] Further, the double-column bottom support platform comprises an arc-shaped support platform whose top is recessed in an arc shape, and a pair of support columns which are used for supporting the arc-shaped support platform.

[0015] Further, the bottom of the anti-toppling beam is connected with a steel cable which is connected with the lifting lug provided on the top end surface of the vacuum chamber ring segment.

[0016] Further, the outer support mechanism comprises a slant arm and two vertical arms with different lengths, the top end of the slant arm and the top end of the long vertical arm are fixed on a sticking block which is tightly stuck on the outer surface of the lower part of the vacuum chamber ring segment, and the short vertical arm is fixedly installed at the lower middle part of the slant arm.

[0017] Further, the limiting mechanism comprises a horizontal bar and two vertical bars which are integrally connected to form a П-shaped frame structure, the side of the two vertical bars away from each other and close to the horizontal bar is used to contact the two opposite inner walls of the window in the vacuum chamber ring segment, and the end of the two vertical bars away from the horizontal bar is connected to the column connecting rod to fix the limiting mechanism.

[0018] Further, the limiting mechanism comprises an adjusting stud, a moving tube, an inner limiting rod, an outer limiting rod, a horizontal column and a pair of oppositely arranged anti-rotation columns, wherein,

[0019] One end of the adjusting stud is fixedly installed in the column connecting rod and can rotate in place, the other end of the adjusting stud is threadedly installed in the moving tube after extending out of the column connecting rod, two strip-shaped limiting grooves with a length shorter than the depth of the thread blind hole are arranged on the inner side wall of the thread blind hole in the moving tube along the depth direction of the thread blind hole, the first limiting rod is slidably inserted into the strip-shaped limiting groove, and a cylindrical light hole section with a larger hole diameter is arranged below the strip-shaped limiting groove and coaxially communicated with the thread blind hole; the first limiting rod is fixed on the column connecting rod, the second limiting rod parallel to the first limiting rod is also fixed on the column connecting rod, and the two anti-rotation columns are respectively fixed on the two ends of the horizontal column to form a П-shaped frame structure.

[0020] In the initial state, the two anti-rotation columns are arranged in an up-down opposite manner, and the first limiting rod is located in the first limiting groove, so that when the adjusting stud is rotated, the moving tube moves axially and the horizontal column completely passes through the window in the vacuum chamber ring segment, at this time, the first limiting rod is completely separated from the strip-shaped limiting groove, so that the moving tube can rotate with the adjusting stud, and during the reverse rotation of the adjusting stud, one of the anti-rotation columns contacts the second limiting rod, so that the moving tube cannot rotate with the adjusting stud, and at this time, the end of the first limiting rod is opposite to the second limiting groove and can slide into the second limiting groove, and the first limiting rod slides into the second limiting groove to make the moving tube close to the side of the column connecting rod, so that the horizontal column is pressed on the inner end surface of the window in the vacuum chamber ring segment.

[0021] The application further provides an assembly method of a tokamak internal component, which adopts an auxiliary support mechanism for installation and comprises the following steps: fixedly installing the central column and the auxiliary column, sleeving two disc-type basket bolt support mechanisms on the central column and adjusting each basket bolt to be the shortest, fixedly connecting the adjacent auxiliary columns through a column connecting rod, and positioning and installing a double-column type bottom support table and an outer side support mechanism and fixing the same on the ground; using a vacuum chamber top lifting lug, first hoisting a 3 / 8 vacuum chamber ring segment group between the central column and the auxiliary column, welding and fixing the double-column type bottom support table and the outer side support mechanism at a position in contact with the vacuum chamber, then installing and fixing an anti-toppling beam and connecting the bottom of the anti-toppling beam with the top surface of the vacuum chamber ring segment, adjusting the screw rod of the disc-type basket bolt mechanism on the central column until the top end connecting piece of each basket bolt is on the inner surface of the vertical section on the central side of the vacuum chamber; building the U-shaped operation platform inside the vacuum chamber, connecting the U-shaped operation platform with the inner bottom of the vacuum chamber through a plurality of support legs, supporting the two ends of the U-shaped operation platform extending outside the vacuum chamber ring segment group by two support columns, then passing the limiting mechanism through the window in the vacuum chamber ring segment from the inside of the vacuum chamber on the U-shaped operation platform and installing the limiting mechanism on the corresponding column connecting rod to limit the vacuum chamber, and finally hoisting each type of small internal component assembly auxiliary tool on the U-shaped operation platform into the vacuum chamber from the D-shaped notch on the two sides of the vacuum chamber ring segment group and starting the assembly of the internal components.

[0022] The internal components of the vacuum chamber ring segment group are assembled, a plurality of sets of small internal component assembly auxiliary tools are sent into the vacuum chamber from the D-shaped notches on the two ends of the vacuum chamber ring segment group, first, the cladding, the upper passive plate and the lower passive plate in the middle ring segment and one side ring segment of the 3 / 8 vacuum chamber ring segment group are assembled, after completion, the cladding, the upper passive plate and the lower passive plate in the other side ring segment are assembled, until the assembly of the three groups of cladding, the upper passive plate and the lower passive plate in the 3 / 8 vacuum chamber ring segment group is completed; the various types of small internal component assembly auxiliary tools are withdrawn from the D-shaped notches on the two sides, and the U-shaped operation platform is removed, the divertor is sent to the inner bottom of the vacuum chamber by using a forklift or a crane, is horizontally pushed to the assembly position corresponding to each divertor, until the assembly of the divertor in the 3 / 8 vacuum chamber ring segment group is completed.

[0023] Further, the connection between the anti-toppling crossbeam and the top end of the 3 / 8 vacuum chamber ring set is disconnected, the lifting tool of the forklift or crane is connected with the top of the vacuum chamber ring set, then the disc basket bolt mechanism is adjusted to be the shortest, the welding position between the double-column bottom support table, the outer support mechanism and the vacuum chamber is cut, the welding position on the surface of the vacuum chamber is polished, finally the 3 / 8 vacuum chamber ring set and the internal components are hoisted together into the tokamak main pit for installation; meanwhile, the construction operation of multiple groups of 2 / 8 vacuum chamber rings or 3 / 8 vacuum chamber rings is carried out, for the 2 / 8 vacuum chamber ring set, the assembly method of the aforementioned 3 / 8 vacuum chamber ring set is also used, finally all the vacuum chamber ring sets and the internal components are hoisted into the tokamak main pit for installation until the vacuum chamber ring is completed. After the vacuum chamber ring is completed in the tokamak main pit, the internal components at the three D-shaped welding positions of the vacuum chamber are additionally installed until all the internal components are completely installed.

[0024] Beneficial effects: the assembly method proposed in the application is in parallel, the assembly process of the tokamak internal components is segmented, most of the internal components are pre-assembled in multiple groups in parallel offline before the vacuum chamber ring is completed, then the internal components are sent into the tokamak main pit together with the vacuum chamber for ring welding, and a small amount of internal components in the joint area of the vacuum chamber are additionally installed. The auxiliary support mechanism for assembly in the application is suitable for all ring-shaped tokamak vacuum chambers, has a wide application range, can effectively solve the problems of few internal component transportation channels and limited assembly construction space, various large general-purpose devices can transport and install the internal components through the side gap of the vacuum chamber, the construction difficulty and cost are reduced, thereby the assembly efficiency and quality of the internal components can be effectively improved, and the total assembly progress of the tokamak device main machine is greatly accelerated. BRIEF DESCRIPTION OF DRAWINGS

[0025] The following are some specific embodiments described in the present specification for the purpose of illustrating the principles of the specific operation execution structure or method of some embodiments of the application, but this does not mean that the physical structure or operation steps of the application can only be as shown in the drawings.

[0026] Figure 1 The distribution of the internal components of the existing compact tokamak;

[0027] Figure 2 The internal component assembly flowchart of a single vacuum chamber ring;

[0028] Figure 3 The flowchart of the assembly method of the tokamak internal components in the application;

[0029] Figure 4 The structural schematic diagram of the auxiliary support mechanism for the assembly of the tokamak internal components in the application;

[0030] Figure 5 Figure 1 is a structural schematic diagram of a disc flower basket bolt mechanism;

[0031] Figure 6 Figure 2 is a structural schematic diagram of a double-column bottom support platform;

[0032] Figure 7 Figure 3 is a structural schematic diagram of a stand connecting rod and anti-tilting beam.

[0033] Figure 8 Figure 4 is a structural schematic diagram of an outer support mechanism and a window limiting mechanism in a vacuum chamber ring petal;

[0034] Figure 9 Figure 5 is a schematic diagram of another structure of a limiting mechanism in an initial state;

[0035] Figure 10 Figure 6 is a longitudinal sectional view of the structure shown in Figure 5; Figure 9

[0036] Figure 7 is a longitudinal sectional view of a moving tube in Figure 6; Figure 11 Figure 10 Figure 8 is a schematic diagram of the moving tube in Figure 7 sliding out axially away;

[0037] Figure 12 Figure 9 is a schematic diagram of the moving tube and its attached components in the limiting mechanism shown in Figure 5 axially retreating.

[0038] Figure 13 Figure 9 Figure 10 is a longitudinal sectional view of the moving tube in Figure 9;

[0039] Element number explanation: central stand 1, anti-tilting beam 2, auxiliary stand 3, stand connecting rod 4, limiting mechanism 5, longitudinal rod 501, transverse rod 502, outer support mechanism 6, inclined arm 601, long vertical arm 602, short vertical arm 603, sticking block 604, small internal component assembly auxiliary tool 7, stand bottom support platform 8, disc flower basket bolt support mechanism 9, U-shaped operation platform 10, 3 / 8 vacuum chamber ring petal group 11, connecting disc 12, flower basket bolt 13, top connecting sheet 14, arc-shaped support platform 15, support column 16, steel cable 17, pin shaft 18, adjusting stud 19, moving tube 20, first limiting groove 2001, second limiting groove 2002, threaded blind hole 2003, cylindrical light hole section 2004, first limiting rod 21, rotation stopping column 22, transverse column 23, second limiting rod 24, pre-tightening compression spring 25, upper passive plate 26, internal diagnostic cable 27, cladding module 28, deflector 29, lower passive plate 30. DETAILED DESCRIPTION

[0040] ​​The embodiments of the present invention will be fully described below. Some core features of the embodiments will be specifically illustrated in the accompanying drawings, wherein the same or similar reference numerals in the drawings represent the same or similar technical features, or structures, steps, or processes with similar functions. Other embodiments derived by those skilled in the art based on these embodiments without requiring creative effort are also within the protection scope of the present invention.

[0041] First, it should be noted that the assembly method of the tokamak internal components of this invention is a parallel method, rather than the traditional series method. That is, this method assembles the tokamak internal components in two ways: most internal components are pre-assembled offline in multiple groups simultaneously, while a small number of internal components are assembled in the main unit pit. This method considers the structure and welding of the vacuum chamber. Based on the segmentation of the vacuum chamber, each segment is first welded in pairs or groups of three in the offline pre-assembly hall to form a ring segment, thus forming a vacuum chamber ring segment. Then, each 3 / 8 vacuum chamber ring segment group 11 is placed on the internal component assembly auxiliary mechanism of this invention, and its corresponding internal components are installed on the inner wall of the vacuum chamber. Multiple sets of construction operations are performed simultaneously. Then, each 3 / 8 vacuum chamber ring segment group 11 and its internal components are hoisted together into the tokamak main unit pit for the ring assembly of the vacuum chamber. Finally, the internal components at the weld seams of the vacuum chamber are added and installed in the main unit pit, effectively reducing the overall assembly cycle of the internal components.

[0042] Specifically, regarding the assembly of the internal components of each vacuum chamber annular lobe, this embodiment uses... Figure 1 The following description uses the internal component distribution of a certain compact tokamak as an example. Each 1 / n vacuum chamber annular lobe corresponds to a set of D-shaped internal components. For the assembly flowchart of the internal components of a single vacuum chamber annular lobe, please refer to [link / reference needed]. Figure 2 As shown; the specific assembly method is as follows: First, assemble the internal diagnostic cable 27 that is tightly attached to the inner wall of the vacuum chamber annular lobe. Then, lay the cooling pipes of the cladding system along the D-shaped cross-section of the vacuum chamber annular lobe, and then begin assembling the cladding module 28. Assign the assembly sequence according to the shape of each cladding module 28. First, assemble the #4 cladding, #5 cladding, and #6 cladding in sequence, followed by the #3 cladding, #2 cladding, and #1 cladding. Since the upper passive plate 26 is relatively small, it can be installed simultaneously during construction if the site space allows. After assembling the upper passive plate 26, assemble the #7 cladding, #8 cladding, and #9 cladding in sequence, then assemble the lower passive plate 30. Finally, assemble the divertor 29 on the inner bottom support platform of the vacuum chamber annular lobe to complete the assembly of the internal components of one vacuum chamber annular lobe.

[0043] To further illustrate the assembly method of this invention, we will now take the assembly method of a vacuum chamber consisting of eight welded segments as an example. The specific flowchart is as follows: Figure 3As shown; the specific assembly method is as follows: Divide the 8-lobed 1 / 8 vacuum chamber annular lobes into three groups: A, B, and C. Group A contains 3 1 / 8 vacuum chamber annular lobes, Group B contains 2 1 / 8 vacuum chamber annular lobes, and Group C contains 3 1 / 8 vacuum chamber annular lobes. Simultaneously perform welding operations on the three groups to form 3 / 8 vacuum chamber annular lobe group A, 2 / 8 vacuum chamber annular lobe group B, and 3 / 8 vacuum chamber annular lobe group C, respectively. Place the three 3 / 8 vacuum chamber annular lobe groups 11 onto three specially designed auxiliary support mechanisms for assembling internal components of the tokamak, and then begin... Figure 2 The internal components are assembled in the order shown in the flowchart. Since the D-shaped notches on both sides of each 3 / 8 vacuum chamber annular lobe assembly 11 are fully open, the internal components of two 1 / 8 vacuum chamber annular lobe assemblies can be assembled simultaneously, further improving assembly efficiency. After completing the installation of the internal components of each 3 / 8 vacuum chamber annular lobe assembly 11, the 3 / 8 vacuum chamber annular lobe assembly 11 and its internal components are hoisted together into the main unit pit. First, 3 / 8 vacuum chamber annular lobe assembly A and 2 / 8 vacuum chamber annular lobe assembly B are welded together to form a 5 / 8 vacuum chamber annular lobe assembly. Then, the internal components at the vacuum chamber weld between 3 / 8 vacuum chamber annular lobe assembly A and 3 / 8 vacuum chamber annular lobe assembly B are installed. Next, 3 / 8 vacuum chamber annular lobe assembly C is welded together with 3 / 8 vacuum chamber annular lobe assemblies A and B. Finally, the internal components at the vacuum chamber weld between 3 / 8 vacuum chamber annular lobe assembly A and 3 / 8 vacuum chamber annular lobe assembly C, and between 3 / 8 vacuum chamber annular lobe assembly B and 3 / 8 vacuum chamber annular lobe assembly C are installed.

[0044] As a more detailed embodiment, the auxiliary support mechanism for assembling the internal components of the tokamak mentioned in the above assembly method, such as... Figures 4-5 As shown, it mainly includes a supporting column mechanism, a column connecting rod 4, and a limiting mechanism 5 for the window in the vacuum chamber annular lobe, such as... Figure 6 The disc-type turnbuckle support mechanism 9, the anti-tipping beam 2, and as shown are... Figure 7 The diagram shows a double-column bottom support platform, an outer support mechanism 6, a U-shaped operating platform 10, and small internal component assembly auxiliary fixtures 7. The interconnections between these components are as follows: Figure 4As shown, the support column mechanism mainly includes four support columns, specifically divided into one center column 1 and three auxiliary columns 3, two disc basket bolt support mechanisms 9 are installed on the center column 1, the center column 1 and the top of the three auxiliary columns 3 are provided with positioning pin shafts 18 for installing the anti-toppling beam 2 of the vacuum chamber, the anti-toppling beam 2 is connected with the top lifting lug of the vacuum chamber through a steel cable 17, and the three auxiliary columns 3 are fixedly connected through column connecting rods 4. In addition, at least two limiting mechanisms 5 of the window of the vacuum chamber ring petals are installed on the lower column connecting rods 4, three double-column bottom support tables are arranged at the bottom of the vacuum chamber ring petals and aligned with the bottom center of each vacuum chamber ring petal, six outside support mechanisms 6 are arranged outside the vacuum chamber ring petals and placed on the outside of the vacuum chamber ring petals, a U-shaped operation platform 10 is arranged inside the vacuum chamber, both ends of the U-shaped operation platform 10 are connected with the ground through support columns 16, and the middle section is connected with the inside of the vacuum chamber through the support legs at the bottom. The small internal component assembly auxiliary tool 7 is provided with a wheel group at the bottom and can move on the U-shaped operation platform 10 to facilitate the installation of internal components.

[0045] In the above embodiment, the limiting mechanism 5 can have two structural designs:

[0046] One is the simplest structure, that is, as shown in Figure 8 , mainly including a cross rod 502 and two longitudinal rods 501, the cross rod 502 and the longitudinal rod 501 are integrally connected, and can be integrally formed during manufacturing, so that the limiting mechanism 5 is in the form of a П-shaped frame structure, the parts of the two longitudinal rods 501 on the side opposite to each other and close to the cross rod 502 are used to contact the two opposite inner walls of the window of the vacuum chamber ring petals, and the ends of the two longitudinal rods 501 away from the cross rod 502 are connected to the column connecting rod 4 to fix the limiting mechanism 5. In practice, it can be inserted from the window of the vacuum chamber ring petals and fixed on the column connecting rod 4 to form a limiting effect.

[0047] The second limiting mechanism 5 is shown in Figures 9-13Specifically, it includes an adjusting stud 19, a moving tube 20, an inner limit rod, an outer limit rod, a horizontal column 23, and a pair of oppositely arranged anti-rotation columns 22. One end of the adjusting stud 19 is installed in the column connecting rod 4 with its own rotation in place. During manufacturing, a disc (not shown in the figure) can be coaxially installed at its end. The disc is located in the hollow part inside the column connecting rod 4. One end face of the adjusting stud 19 is provided with an internal hexagonal groove to facilitate the rotation of the adjusting stud 19. The other end of the adjusting stud 19 extends out of the column connecting rod 4 and is threadedly installed inside the moving tube 20. On the inner wall of the threaded blind hole 2003 into which the adjusting stud 19 is screwed, there are two strip-shaped limiting grooves along the depth direction of the threaded blind hole 2003. The two strip-shaped limiting grooves allow the first limiting rod 21 to slide into them. Below the strip-shaped limiting grooves, there is a cylindrical smooth hole section 2004 with a larger diameter that is coaxially connected to the threaded blind hole 2003, so that when the first limiting rod 21 is located in the smooth hole section, the moving tube 20 can rotate without being restricted by it. The first limiting rod 21 is fixed to the column connecting rod 4. A second limiting rod 24, parallel to the first limiting rod 21, is also fixed to the column connecting rod. An anti-rotation post 22 is fixed to each of the two opposite outer walls of the moving tube 20. The ends of the two anti-rotation posts 22 are fixed to the two ends of the horizontal column 23, forming a П-shaped frame structure. Furthermore, as... Figure 11 In this embodiment, a first limiting groove 2001 and a second limiting groove 2002, which are parallel to each other, are provided on the inner wall of the moving tube 20. In the initial state where the limiting mechanism 5 is not limiting, such as... Figures 9-10 The two anti-rotation columns 22 are arranged vertically opposite each other, with one above the other. The first limiting rod 21 is located within the first limiting groove 2001, so that when the adjusting stud 19 is rotated, the moving tube 20 moves axially, thereby carrying the transverse column 23 completely through the window in the vacuum chamber annular lobe and into the interior of the vacuum chamber annular lobe. After entering the interior of the vacuum chamber annular lobe, the first limiting rod 21 completely disengages from the strip-shaped limiting groove and enters the aforementioned cylindrical aperture section 2004, losing its guiding function for the moving tube 20. This allows the moving tube 20 to move with the adjusting stud due to the threaded connection. 19 rotates synchronously or asynchronously, and during the process of reversing the adjusting stud 19, one of the anti-rotation studs 22 contacts the second limiting rod 24, so that the moving tube 20 can no longer rotate with the adjusting stud 19. At this time, the end of the first limiting rod 21 is exactly facing the second limiting groove 2002 and can slide into the second limiting groove 2002. Continue to reverse the adjusting stud 19. Because the first limiting rod 21 slides into the second limiting groove 2002, the moving tube 20 moves closer to the column connecting rod 4, causing the horizontal column 23 to be pressed against the inner end face of the window in the vacuum chamber annular lobe.

[0048] In the above structure, it is worth mentioning that: the second limiting groove 2002 is a preferred design scheme, which is to make the movable pipe 20 and the frame structure more stably connected to the middle window, avoiding the frame structure from being loosened due to misrotation during use after being connected to the middle window. In fact, only relying on the second limiting rod 24 is enough to guide the axial movement of the movable pipe 20 to retreat, so that the second limiting groove 2002 can not be set, but the reliability will be greatly reduced, and the movable pipe 20 is easy to misrotate under the influence of accidental factors such as vibration, so that the limiting mechanism loses the limiting effect. When disassembling, rotate the adjusting stud 19 counterclockwise, move the cross column 23 away from the inner port of the middle window, that is, continue to move towards the inside, until the movable pipe 20 is separated from the threaded connection relationship with the adjusting stud 19, then the movable pipe 20 and the aforementioned frame structure of the limiting mechanism can be removed, and then the vacuum chamber ring petal group can be lifted away. The approximate movement path of the limiting mechanism 5 of the design structure is to move towards the middle window of the vacuum chamber ring petal first, pass through the middle window of the vacuum chamber ring petal, enter the inside of the vacuum chamber ring petal, then reverse 90 degrees and move back, such as Figure 13 , make the cross column 23 press on the inner port of the middle window of the vacuum chamber ring petal, and limit the movement of the vacuum chamber ring petal in the corresponding direction together with the rotation stopping column 22.

[0049] In the above limiting mechanism 5, as a preferred design structure, a pre-tightening spring 25 can also be arranged between the end face of the adjusting stud 19 and the inner wall of the movable pipe 20, which always has an axial pushing force on the adjusting stud 19, so that when the first limiting rod 21 slides out of the first limiting groove 2001, the adjusting stud 19 and the movable pipe 20 are connected as a whole and can rotate synchronously. In addition, as a better design structure, the aforementioned pre-tightening spring 25 can also be a torsional spring, which makes the movable pipe 20 rotate rapidly to the position where the first limiting rod 21 is opposite to the second limiting groove 2002 under the action of the torsional spring when the first limiting rod 21 slides out of the first limiting groove 2001 of the movable pipe 20.

[0050] In the above embodiment, the auxiliary supporting mechanism for assembling the Tokamak internal components is used in practice as follows:

[0051] First, the main supporting structure is built, which specifically includes 4 supporting columns, i.e. a center column 1 and 3 auxiliary columns 3, wherein two disc-type basket bolt supporting mechanisms 9 are sleeved on the center column 1, according to the volume of the 3 / 8 vacuum chamber ring petal group 11, 6 basket bolts 13 are selected and each basket bolt 13 is adjusted to the shortest, fixedly connected through the column connecting rod 4 between the 3 auxiliary columns 3, and the 3 double-column type bottom supporting tables and the 6 outer side supporting mechanisms 6 are positioned and installed and fixed on the ground.

[0052] Secondly, the 3 / 8 vacuum chamber ring group 11 is hung on the top lug of the vacuum chamber ring, and the double-column bottom support table and the outer support mechanism 6 are welded and fixed at the contact position of the vacuum chamber ring. Then, the anti-toppling beam 2 of the three vacuum chamber rings is installed at the top of the four support columns, the steel cable 17 on the anti-toppling beam 2 is connected with the top lug of the vacuum chamber ring, and then the screw rod of the disc basket bolt 13 mechanism on the center column 1 is adjusted until the top connecting piece 14 of each basket bolt 13 is on the inner surface of the vertical section of the D-shaped vacuum chamber ring.

[0053] Then, a U-shaped operation platform 10 is built inside the vacuum chamber ring, which is connected with the inner bottom of the vacuum chamber through several support legs, and the two ends of the U-shaped operation platform 10 extending out of the outer side of the 3 / 8 vacuum chamber ring group 11 are supported by two support columns 16. Then, the limiting mechanism 5 of the vacuum chamber ring window is passed through the vacuum chamber ring window from the inside of the vacuum chamber ring and installed on the corresponding column connecting rod 4 on the U-shaped operation platform 10 to limit the vacuum chamber ring. Finally, various small internal components are hung on the U-shaped operation platform 10 one by one, and the 3 / 8 vacuum chamber ring group 11 is installed in the vacuum chamber ring through the D-shaped gap on both sides of the vacuum chamber ring.

[0054] During installation, the internal components of the 3 / 8 vacuum chamber ring group 11 are assembled according to the above-mentioned assembly process. In order to speed up the assembly progress, two sets of assembly auxiliary tools are sent in from the D-shaped gap on both ends of the 3 / 8 vacuum chamber ring group 11. First, the cladding, upper passive plate 26, lower passive plate 30 and other internal components in the middle ring and one side ring of the 3 / 8 vacuum chamber ring group 11 are assembled, and then the cladding, upper passive plate 26, lower passive plate 30 and other internal components in the other side ring are assembled until the three sets of cladding, upper passive plate 26 and lower passive plate 30 in the 3 / 8 vacuum chamber ring group 11 are completely assembled.

[0055] Then, the various small internal component assembly tools 7 are removed from the D-shaped gap on both sides, and the U-shaped operation platform 10 is removed. The divertor 29 is sent to the inner bottom of the vacuum chamber ring by using a forklift or a crane, and is horizontally pushed to the corresponding assembly position of each divertor 29 until the divertor 29 in the 3 / 8 vacuum chamber ring group 11 is completely assembled. Then, the connection between the anti-toppling beam 2 and the top lug of the 3 / 8 vacuum chamber ring group 11 is disconnected, the lifting tool of the carrying crane is connected with the lug, and then the disc basket bolt 13 mechanism is adjusted to the shortest. The welding between the double-column bottom support table, the outer support mechanism 6 and the vacuum chamber is cut, and the welding points on the surface of the vacuum chamber ring are polished. Finally, the 3 / 8 vacuum chamber ring group 11 and its internal components are lifted together into the tokamak main pit for installation.

[0056] In the above installation, the construction operation of 2 sets of vacuum chamber ring tiles or 3 sets of vacuum chamber ring tiles is carried out at the same time, for the 2 / 8 vacuum chamber ring tile set 11, the above applicable method is also applicable, finally all the 3 / 8 vacuum chamber ring tile set 11 and the internal components are hoisted into the tokamak main pit for installation, until the vacuum chamber ring closing is completed. After the vacuum chamber ring closing in the tokamak main pit, the internal components at the 3 D-shaped welds of the 3 / 8 vacuum chamber ring tile set 11 are additionally installed, until all the internal components are completely installed.

[0057] The above series of specific implementation details, only show some preferred embodiments in the inventive concept, cannot be limited by the claims protection scope of the application, those skilled in the art can simply change the design idea on the basis of understanding the above embodiments, refer to the basic principles recorded in the claims of the application, but these changes still belong to the protection scope of the application.

Claims

1. An auxiliary support mechanism for assembling an internal component of a tokamak, characterized by, The device comprises a center column (1) and at least two auxiliary columns (3) which are vertically installed, all the auxiliary columns (3) are installed at equal center distance with the center column (1), the center column (1) is provided with two layers of disc basket bolt support mechanisms (9) which are arranged in upper and lower positions, the disc basket bolt support mechanism (9) comprises a connecting disc (12) which is coaxially installed on the outer surface of the center column, and a plurality of basket bolts (13) which are connected in an annular array around the connecting disc (12), one end of the basket bolt (13) is connected with the outer surface of the vertical section of the vacuum chamber ring petal; The device further comprises an outer side support mechanism (6) which is connected around the outer surface of the vacuum chamber ring petal group, and a double-column type bottom support platform which is arranged below the vacuum chamber ring petal group, so as to support the vacuum chamber ring petal group from the outer side and the lower side respectively, the top ends of two adjacent auxiliary columns (3) are connected with the center column (1) through an anti-toppling cross beam (2), and a pair of vertically arranged column connecting rods (4) are connected between the two adjacent auxiliary columns (3), at least one column connecting rod (4) in each pair of column connecting rods (4) is provided with a limiting mechanism (5) which can extend into the window of the vacuum chamber ring petal, the limiting mechanism (5) is used for limiting the movement of the vacuum chamber; The device further comprises a U-shaped operation platform (10) which is arranged in a horizontal plane, the U-shaped operation platform (10) passes through the vacuum chamber ring petal group, the curved section of the U-shaped operation platform (10) is arranged inside the vacuum chamber ring petal group, and the curvature of the curved section is consistent with the curvature of the vacuum chamber ring petal group in the splicing direction, a plurality of small internal component assembly auxiliary tools (7) are movably installed on the U-shaped operation platform (10); The limiting mechanism (5) comprises a horizontal rod (502) and two vertical rods (501), the horizontal rod (502) and the vertical rods (501) are integrally connected to form a П-shaped frame structure, the side of the two vertical rods (501) which is away from the horizontal rod (502) is used for contacting two opposite inner side walls of the window of the vacuum chamber ring petal, and the end of the two vertical rods (501) which is away from the horizontal rod (502) is connected with the column connecting rod (4) to fix the limiting mechanism (5).

2. The auxiliary support mechanism for assembling an internal component of a tokamak according to claim 1, wherein, The end of the basket bolt (13) is fixed with a top connecting plate (14), the top connecting plate (14) is used for abutting connection with the outer surface of the vertical section.

3. The auxiliary support mechanism for assembling an internal component of a tokamak according to claim 1, wherein, The bottom of the U-shaped operation platform (10) is connected with a support leg, the support leg is installed at the bottom of the internal area of the vacuum chamber ring petal.

4. The auxiliary support mechanism for assembling an internal component of a tokamak according to claim 1, wherein, One end of the anti-toppling cross beam (2) is fixed through pin connection at the top center of the auxiliary column (3), the other end of the anti-toppling cross beam (2) is fixed through pin connection at the top center of the center column (1), the other end of the anti-toppling cross beam (2) is in the shape of an isosceles triangle, and the inclined surfaces of the ends of two adjacent anti-toppling cross beams (2) abut with each other.

5. The auxiliary support mechanism for assembling an internal component of a tokamak according to claim 1, wherein, The double-column type bottom support platform comprises an arc-shaped support platform (15) which is concave in the top, and a pair of support columns (16) which are used for supporting the arc-shaped support platform (15).

6. The auxiliary support mechanism for assembling an internal component of a tokamak according to claim 1, wherein, The bottom of the anti-toppling crossbeam (2) is connected with a steel cable (17), which is connected with a lifting lug arranged on the top end surface of the vacuum chamber ring petals; the outer side supporting mechanism (6) comprises an inclined arm (601) and two vertical arms with different lengths, the two vertical arms are vertically installed, the top end of the inclined arm (601) is fixed on a top end of the long vertical arm (602), the top end of the short vertical arm (603) is fixedly installed at the lower middle part of the inclined arm (601).

7. The auxiliary support mechanism for assembling an internal component of a tokamak according to claim 1, wherein, The limiting mechanism (5) comprises an adjusting stud (19), a moving pipe (20), an inner limiting rod, an outer limiting rod, a cross column (23) and a pair of oppositely arranged rotation stopping columns (22), wherein, One end of the adjusting stud (19) is installed in the vertical column connecting rod (4) and can rotate in place, the other end of the adjusting stud (19) is threadedly connected to the moving pipe (20) and extends out of the vertical column connecting rod (4), two strip-shaped limiting grooves with a length shorter than the depth of the thread blind hole (2003) are arranged on the inner side wall of the thread blind hole (2003) of the moving pipe (20) in the depth direction of the thread blind hole (2003), the first limiting rod (21) is slidably inserted into the strip-shaped limiting grooves, a cylindrical light hole section (2004) with a larger hole diameter is arranged below the strip-shaped limiting grooves and coaxially communicates with the thread blind hole (2003), the first limiting rod (21) is fixed on the vertical column connecting rod (4), the second limiting rod (24) parallel to the first limiting rod (21) is also fixed on the vertical column connecting rod (4), one of the rotation stopping columns (22) is fixed on each of the two opposite outer walls of the moving pipe (20), the ends of the two rotation stopping columns (22) are fixed on the two ends of the cross column (23) and form a П-shaped frame structure, the first limiting groove (2001) and the second limiting groove (2002) parallel to each other are arranged on the inner wall of the moving pipe (20); In the initial state, the two rotation stopping columns (22) are arranged in an up-down opposite manner and the first limiting rod (21) is located in the first limiting groove (2001), so that when the adjusting stud (19) is rotated, the moving pipe (20) moves axially and the cross column (23) completely passes through the window in the vacuum chamber ring petals, at this time, the first limiting rod (21) is completely separated from the strip-shaped limiting grooves, so that the moving pipe (20) can rotate with the adjusting stud (19), and during the reverse rotation of the adjusting stud (19), one of the rotation stopping columns (22) is in contact with the second limiting rod (24), so that the moving pipe (20) cannot rotate with the adjusting stud (19), at this time, the end of the first limiting rod (21) is opposite to the second limiting groove (2002) and can slide into the second limiting groove (2002), the first limiting rod (21) slides into the second limiting groove (2002) and makes the moving pipe (20) close to the side of the vertical column connecting rod (4), so that the cross column (23) is pressed on the inner end surface of the window in the vacuum chamber ring petals.

8. A method of assembling a tokamak internal component, characterized in that, The auxiliary supporting mechanism is used for installation, comprising the following steps: S1, the center column (1) and auxiliary column (3) are fixedly installed, two disc basket bolt support mechanisms (9) are sleeved on the center column (1), and each basket bolt (13) is adjusted to be the shortest, the adjacent auxiliary columns (3) are fixedly connected through the column connecting rods (4), and the double-column type bottom support table and the outer side support mechanism (6) are positioned and installed and fixed on the ground; S2, the 3 / 8 vacuum chamber ring segment group (11) is first hung to the center column (1) and the auxiliary column (3) by using the top lifting lug of the vacuum chamber, the double-column type bottom support table and the outer side support mechanism (6) are welded and fixed at the places in contact with the vacuum chamber, then the anti-toppling cross beam (2) is installed and fixed, the bottom of the anti-toppling cross beam (2) is connected with the top surface of the vacuum chamber ring segment, the screw rod of the disc basket bolt mechanism on the center column (1) is adjusted until the top end connecting piece (14) of each basket bolt (13) is on the inner surface of the vertical section on the center side of the vacuum chamber; S3, the U-shaped operation platform (10) is built inside the vacuum chamber, the U-shaped operation platform (10) is connected with the inner bottom of the vacuum chamber through a plurality of support legs, the two ends of the U-shaped operation platform (10) extending out of the outer side of the vacuum chamber ring segment group are supported by two support columns (16), then the limiting mechanism (5) is passed through the window in the vacuum chamber ring segment from the inside of the vacuum chamber and is installed on the corresponding column connecting rod (4) on the U-shaped operation platform (10), the vacuum chamber is limited, finally various small internal components are hung on the U-shaped operation platform (10) one by one, the internal components are sent into the vacuum chamber from the D-shaped notch on the two sides of the vacuum chamber ring segment group, and the assembly of the internal components is started; S4, the internal components of the vacuum chamber ring segment group are assembled, a plurality of sets of small internal component assembly auxiliary tools (7) are sent into the D-shaped notch on the two ends of the vacuum chamber ring segment group, first, the cladding, upper passive plate (26) and lower passive plate (30) in the middle ring segment and one side ring segment of the 3 / 8 vacuum chamber ring segment group (11) are assembled, after completion, the cladding, upper passive plate (26) and lower passive plate (30) in the other side ring segment are assembled, until the assembly of the three groups of cladding, upper passive plate (26) and lower passive plate (30) in the 3 / 8 vacuum chamber ring segment group (11) is completed; S5, the various small internal component assembly auxiliary tools (7) are withdrawn from the two D-shaped notches, and the U-shaped operation platform (10) is removed, the divertor (29) is sent to the inner bottom of the vacuum chamber by using a forklift or a crane, is horizontally pushed to the corresponding assembly position of each divertor (29), and until the assembly of the divertor (29) in the 3 / 8 vacuum chamber ring segment group (11) is completed.

9. A method of assembling a tokamak internal component according to claim 8, characterised in that, Further comprising the following steps: S6, the connection between the anti-toppling cross beam (2) and the top end of the 3 / 8 vacuum chamber ring segment group (11) is disconnected, the lifting tool of the forklift or the crane is connected with the top of the vacuum chamber ring segment group, then the disc basket bolt mechanism is adjusted to be the shortest, the welding part of the double-column type bottom support table and the outer side support mechanism (6) with the vacuum chamber is cut, the welding points on the surface of the vacuum chamber are polished, and finally the 3 / 8 vacuum chamber ring segment group (11) and the internal components are hoisted into the tokamak main pit for installation. S7. Simultaneously carry out construction operations of multiple sets of 2 / 8 vacuum chamber annular lobes or 3 / 8 vacuum chamber annular lobes. For the 2 / 8 vacuum chamber annular lobes, follow the same assembly method as the aforementioned 3 / 8 vacuum chamber annular lobes (11). Finally, hoist all the vacuum chamber annular lobes and their internal components into the tokamak main unit pit for installation until the vacuum chamber ring is closed. S8. After the vacuum chamber in the tokamak main unit pit is closed, install the internal components at the three D-shaped welds of the vacuum chamber until all internal components are installed.

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