Method of assembling a vacuum chamber cold shield

Abstract

The application discloses a vacuum chamber cold screen assembling method, and belongs to the technical field of fusion reactors. The assembling method comprises the following steps: conveying an inner sector to a first mounting position through a sector pre-assembly tool, pausing and detecting the appearance position of the inner sector multiple times during the conveying, and fixing the inner sector when the distance between the inner sector and a ring petal meets the standard; conveying an outer sector to a second mounting position through the sector pre-assembly tool, pausing and detecting the appearance position of the outer sector multiple times during the conveying, fixing the outer sector when the distance between the outer sector and the ring petal meets the standard, and connecting the outer sector with the inner sector, wherein the second mounting position is determined based on the first mounting position; hoisting a window section to a third mounting position and connecting the window section with the outer sector, wherein the third mounting position is determined based on the second mounting position; hoisting a cover plate to a fourth mounting position and connecting the cover plate with the outer sector and the window section, wherein the fourth mounting position is determined based on the second mounting position and the third mounting position. The design improves the assembling precision of the cold screen and reduces the risk of collapse deformation.

Description

Technical Field

[0001] This application belongs to the field of fusion reactor technology, and in particular relates to a method for assembling a vacuum chamber cold shield. Background Technology

[0002] The annular vacuum chamber, the core component of the nuclear fusion device, is externally wound with coils. The chamber contains the plasma and maintains an ultra-high vacuum environment. When the coils are energized, they generate a helical magnetic field that confines and heats the plasma to high temperatures, enabling the nuclear fusion reaction. A vacuum chamber cold shield is located between the superconducting magnet and the vacuum chamber. The high-temperature plasma inside the vacuum chamber is isolated from the extremely low temperature of the external superconducting magnet by the cold shield, preventing heat exchange.

[0003] In actual construction, when the vacuum chamber cold shield is assembled on the vacuum chamber, the control of the transportation trajectory is extremely difficult because the vacuum chamber cold shield is extremely heavy and has poor rigidity. Furthermore, improper changes in the stress state during transportation can easily cause the vacuum chamber cold shield to collapse and deform. A series of accumulated errors may lead to the failure of the vacuum chamber cold shield assembly or even impact with the vacuum chamber. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a method for assembling vacuum chamber cold shields, which improves the assembly accuracy and success rate of vacuum chamber cold shields and reduces the risk of collapse and deformation of vacuum chamber cold shields during transportation due to improper stress or other reasons.

[0005] In a first aspect, this application provides a method for assembling a vacuum chamber cold shield, comprising: the vacuum chamber cold shield being fitted outside a vacuum chamber composed of multiple annular lobes, and comprising multiple sectors spliced ​​along a circumferential direction, each sector comprising an inner sector segment, an outer sector segment, a window segment, and a cover plate; the assembly method comprising:

[0006] The inner sector segment is transported to the first installation position using a sector pre-assembly tool. During this process, the process is paused multiple times to check the appearance and orientation of the inner sector segment. Once the distance between the inner sector segment and the annular petal meets the standard, the inner sector segment is fixed.

[0007] The outer fan segment is transported to the second mounting position using the sector pre-assembly tool. During this process, the external fan segment's appearance and orientation are checked multiple times. Once the distance between the outer fan segment and the annular lobe meets the standard, the outer fan segment is fixed and connected to the inner fan segment. The second mounting position is determined based on the first mounting position.

[0008] The window segment is hoisted to the third mounting position and connected to the outer fan segment, wherein the third mounting position is determined based on the second mounting position;

[0009] The cover plate is hoisted to a fourth installation position and connected with the outer sector segment and the window segment, wherein the fourth installation position is determined based on the second installation position and the third installation position.

[0010] According to the vacuum chamber cold shield assembling method, the whole process closed-loop control of movement, measurement and correction is realized in the assembling process through the process design of the above-mentioned phased shutdown detection and correction, frequent capture of appearance changes and pose offsets of the inner sector segment and the outer sector segment, control of installation errors at each link, avoidance of irreversible deviation found in final assembling, solution of the low efficiency problem caused by the traditional post-detection rework mode, reduction of the risk of collision between the vacuum chamber cold shield and the vacuum chamber caused by error accumulation, and improvement of the assembling accuracy and success rate of the vacuum chamber cold shield. In combination with the installation sequence design of the inner sector segment-outer sector segment-window segment-cover plate, the collapse deformation risk of the vacuum chamber cold shield caused by improper stress in the conveying process is effectively reduced, so that the stability and reliability of the structure of the vacuum chamber cold shield in the assembling process are significantly improved. In addition, the large sector structure is segmented for installation, the installation difficulty is reduced, each sector segment can be independently adjusted and installed, the mutual interference in the overall installation process is reduced, quality control of each sector segment is facilitated, and the installation efficiency is improved.

[0011] According to an embodiment of the present application, the inner sector segment includes two inner sub-sectors symmetrically arranged; before the inner sector segment is conveyed to the first installation position by the sector pre-assembly tool, the assembling method further includes:

[0012] The two inner sub-sectors are assembled to obtain the inner sector segment, and the inner sector segment is fixed with the first frame;

[0013] In the case that the appearance and pose of the inner sector segment and the ring petals meet the standards, the first frame is suspended and flipped to adjust the inner sector segment to a vertical pose;

[0014] The inner sector segment is loaded to the sector pre-assembly tool by hoisting the first frame.

[0015] According to the vacuum chamber cold shield assembling method, through the above-mentioned pre-assembly, pose adjustment and frame hoisting operations before the inner sector segment is installed, the installation accuracy and stability of the inner sector segment are significantly improved, the problem that the inner sector segment is easily deformed in the transportation and installation process due to insufficient rigidity of the inner sector segment is effectively solved, the installation direction of the inner sector segment and the vacuum chamber is ensured to be consistent, a good foundation is laid for the installation of the outer sector segment and other sectors, and the risk of overall assembling failure is reduced. In addition, the monolithic large inner sector segment is disassembled into two parallel prefabricated inner sub-sectors, the size and weight of a single part are reduced, and manufacturing, transportation and handling are facilitated.

[0016] According to one embodiment of this application, the sector pre-assembly tool includes a support rail, a loading platform, and a rotating device; the process of transporting the inner sector segment to the first mounting position via the sector pre-assembly tool, during which the process involves multiple pauses and checks on the appearance and pose of the inner sector segment, includes:

[0017] The inner sector is fixed to the loading platform by the first frame;

[0018] The loading platform moves on the support track, pausing multiple times to detect the appearance and pose of the inner sector until the first frame is coupled to the rotating device.

[0019] The rotating device drives the first frame to rotate. During this period, the inner fan segment rotates around the fixed axis of the rotating device by a first target angle, and the device pauses and detects the appearance and posture of the inner fan segment until the inner fan segment reaches the first installation position after rotating by a first set angle.

[0020] According to one embodiment of this application, the upper end of the first frame is coupled to the upper output end of the rotating device via a first upper adapter, the first upper adapter being pre-installed on the upper end of the first frame, and the lower end of the first frame is coupled to the lower output end of the rotating device via a first lower adapter; wherein, before loading the inner sector segment onto the sector pre-assembly tool by hoisting the first frame, the method further includes:

[0021] The first lower adapter is installed on the loading platform of the sector pre-assembly tool;

[0022] The upper surface of the first lower adapter is leveled.

[0023] According to one embodiment of this application, the outer fan segment includes two symmetrically arranged outer fans, wherein the process of transporting the outer fan segment to the second mounting position using the sector pre-assembly tool, pausing multiple times during this process to check the appearance and orientation of the outer fan segment, and fixing the outer fan segment and connecting it to the inner fan segment when the distance between the outer fan segment and the annular petals meets the standard includes:

[0024] The two outer fan sections are transported to the corresponding area of ​​the second installation position through the sector pre-assembly tool. During this process, the appearance and position of the current outer fan section are checked multiple times. When the distance between the current outer fan section and the ring petal meets the standard, the current outer fan section is fixed and connected to the inner fan section.

[0025] The external fan includes two symmetrically arranged sub-boards, wherein, before the external fan is transported to the corresponding area of ​​the second mounting position by the sector pre-assembly tool, the assembly method further includes:

[0026] The two corresponding sub-boards are assembled to obtain the current outer fan, and the current outer fan is fixed to the second frame;

[0027] If the current appearance and position of the outer fan and the annular petals meet the requirements, the second frame is suspended and flipped to adjust the current outer fan to a vertical position;

[0028] The current external sector is loaded into the sector pre-assembly tool by hoisting the second frame.

[0029] According to the assembly method of the vacuum chamber cold shield of this application, by performing pre-assembly, attitude adjustment and frame hoisting operations before the installation of a single external fan, combined with the process design of independently installing two external fans sequentially, the installation accuracy and stability of the external fan segment are significantly improved while meeting the requirements of avoiding obstacles between the vacuum chamber and the pre-assembly tools of the sector. This effectively solves the problem of easy deformation of the external fan segment during transportation and installation due to its insufficient rigidity, avoiding rework caused by deformation. At the same time, it ensures that the installation direction of the external fan segment is consistent with that of the vacuum chamber, laying a good foundation for the subsequent installation of the window segment and cover plate, and reducing the risk of overall assembly failure. Furthermore, the large single external fan segment is disassembled into four parallel prefabricated sub-panels, reducing the size and weight of individual components, and facilitating manufacturing, transportation and handling.

[0030] According to one embodiment of this application, the sector pre-assembly tool includes a support rail, a loading platform, and a rotating device. The process of transporting the outer sector to the corresponding area of ​​the second mounting position via the sector pre-assembly tool includes multiple pauses and checks on the current external sector's appearance and orientation.

[0031] The current external fan is fixed to the loading platform by the second frame;

[0032] The loading platform moves on the support track, pausing multiple times to detect the current appearance and pose of the outer fan, until the second frame is coupled to the rotating device.

[0033] The rotating device drives the second frame to rotate. During this period, the current outer fan rotates around the fixed axis of the rotating device by a second target angle, and then pauses and detects the appearance and posture of the current outer fan until the current outer fan rotates by a second set angle and reaches the corresponding area of ​​the second mounting position.

[0034] According to one embodiment of this application, the upper end of the second frame is coupled to the upper output end of the rotating device via a second upper adapter, the second upper adapter being pre-installed on the upper end of the second frame, and the lower end of the second frame is coupled to the lower output end of the rotating device via a second lower adapter; wherein, before loading the current external sector onto the sector pre-assembly tool by hoisting the second frame, the method further includes:

[0035] The second lower adapter is installed on the loading platform of the sector pre-assembly tool;

[0036] Level the upper surface of the second lower adapter.

[0037] According to one embodiment of this application, before the inner sector segment is transported to the first mounting position by the sector pre-assembly tool, the assembly method further includes:

[0038] The first temporary bracket is installed outside the annular petal in the area corresponding to the first installation position, and the height of the first temporary bracket is adjusted to the first target height;

[0039] Furthermore, prior to conveying the outer sector segment to the second mounting position via the sector pre-assembly tool, the assembly method further includes:

[0040] The second temporary bracket is installed outside the annular petal in the area corresponding to the second mounting position, and the height of the second temporary bracket is adjusted to the second target height.

[0041] According to one embodiment of this application, fixing the inner sector segment includes:

[0042] The inner fan segment is temporarily fixed to the first temporary bracket pre-installed on the annular petal;

[0043] And, fixing the outer sector segment and connecting it to the inner sector segment includes:

[0044] The outer fan segment is temporarily fixed to the second temporary bracket pre-installed on the annular petal, and sealed to the inner fan segment by means of an insulating pad and bolts;

[0045] A reinforcing block is embedded between the outer sector segment and the inner sector segment, and the reinforcing block is fastened to the outer sector segment and the inner sector segment by bolts.

[0046] According to one embodiment of this application, the window segment includes two symmetrically arranged branch pipe segments, and the cover plate includes two symmetrically arranged plate segments, wherein the step of hoisting the window segment to the third mounting position and connecting it to the outer fan segment includes:

[0047] First, the first pipe section is hoisted to the corresponding area of ​​the third installation position and connected to the outer fan section;

[0048] The second pipe section is then hoisted to the corresponding area of ​​the third installation position and connected to the outer fan section. The first and second pipe sections are connected to form the window section, so that the window section is fitted outside the neck of the annular petal.

[0049] And, the step of hoisting the cover plate to the fourth installation position and connecting it to the outer fan section and the window section includes:

[0050] First, the first segment is hoisted to the corresponding area of ​​the fourth installation position and connected to the outer fan segment and the window segment;

[0051] The second segment is then hoisted to the corresponding area of ​​the fourth installation position and connected to the outer fan segment and the window segment, thus connecting the first and second segments to form the cover plate.

[0052] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0053] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0054] Figure 1 This is a schematic flowchart of the method for assembling a vacuum chamber cold shield provided in an embodiment of this application;

[0055] Figure 2 This is a schematic diagram of the assembly process of the inner sector of the sector of the vacuum chamber cold shield provided in the embodiments of this application;

[0056] Figure 3 This is a schematic diagram of the assembly process of the outer sector of the sector of the vacuum chamber cold shield provided in the embodiments of this application;

[0057] Figure 4 This is a schematic diagram of the structure of a sector of the vacuum chamber cold shield provided in an embodiment of this application;

[0058] Figure 5 This is a top view of a sector of the vacuum chamber cold shield provided in an embodiment of this application;

[0059] Figure 6 yes Figure 5 Enlarged view of the structure at point A in the middle.

[0060] Figure label:

[0061] Sector 1000, insulating pad 1001, reinforcing block 1002;

[0062] Inner fan section 1100, inner sub-fan 1110;

[0063] External fan section 1200, external split fan 1210, sub-board 1211;

[0064] Window segment 1300, sub-segment 1310;

[0065] Cover plate 1400, segment 1410. Detailed Implementation

[0066] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0067] This application discloses a method for assembling a vacuum chamber cold shield, which is fitted outside a vacuum chamber composed of multiple annular lobes.

[0068] The following is for reference. Figures 1-6 This application describes a method for assembling a vacuum chamber cold shield according to an embodiment of the present application.

[0069] like Figure 4 and Figure 5 As shown, the vacuum chamber cold shield includes multiple sectors 1000 spliced ​​along the circumference. Each sector 1000 includes an inner sector segment 1100, an outer sector segment 1200, a window segment 1300, and a cover plate 1400.

[0070] For example, the ring lobes of the sector 1000 described in this application can correspond to 1 / 8 of a vacuum chamber. In other words, the vacuum chamber includes 8 ring lobes spliced ​​along the circumferential direction, and the vacuum chamber cold screen includes 8 sectors 1000 spliced ​​along the circumferential direction. The 8 sectors 1000 and 8 ring lobes correspond one-to-one. After 1 sector 1000 and 1 ring lobe are assembled, the loop merging operation is performed.

[0071] In this embodiment, such as Figure 4 and Figure 5 As shown, the cross-section of sector 1000 is D-shaped. The cross-section of the inner sector 1100 is mainly the vertical "I" part of the D-shape, while the cross-section of the outer sector 1200 is the curved bow-shaped part of the D-shape. Furthermore, the cross-section of the inner sector 1100 also includes arc-shaped transition sections at both ends, so that the vertical "I" part can provide support for the transition section. Compared with the scheme of incorporating the transition section into the outer sector 1200, the risk of collapse of sector 1000 during the assembly process can be reduced from the structural perspective.

[0072] In some embodiments, such as Figure 1 As shown, the assembly method for the vacuum chamber cold shield includes steps 110, 120, 130, and 140.

[0073] Step 110: The inner sector segment 1100 is transported to the first mounting position using the Sector Sub Assemble Tool (SSAT). During this process, the appearance and orientation of the inner sector segment 1100 are checked multiple times. Once the distance between the inner sector segment 1100 and the ring lobe meets the standard, the inner sector segment 1100 is fixed.

[0074] The sector sub-assembly tool (SSAT) may include, but is not limited to, a track-mounted mobile platform, a multi-axis robotic arm, a hydraulic lifting device, a rotating clamp, or a lifting system. The appropriate motion mechanism is selected according to the actual needs of the vacuum chamber cold shield and the conditions of the construction site. This application embodiment does not impose any restrictions on this.

[0075] In practice, the inner sector segment 1100 is slowly transported to the first installation position outside the vacuum chamber using a sector sub-assembly tool (SSAT). During the process, the process is paused multiple times to check its appearance and pose, including but not limited to flatness, perpendicularity, offset, or tilt angle. The detection methods include but are not limited to laser rangefinders, three-dimensional vision inspection systems, or contact displacement sensor arrays. For each stop for inspection, if the error of the inspection result exceeds the set range, the appearance and pose of the inner sector segment 1100 are precisely adjusted and corrected to ensure that the distance between each part of the inner sector segment 1100 and the ring lobe meets the design requirements before it is fixed, forming the basic structure of the cold screen.

[0076] It should be noted that the first installation position is the target installation location determined in advance through 3D modeling, mathematical calculations, and other means.

[0077] During the transportation of the inner sector 1100, the setting principle for multiple pause detection nodes can be based on a fixed distance or a fixed duration, and this application embodiment does not impose any restrictions on this.

[0078] Understandably, the installation accuracy of the inner sector segment 1100, as the inner support structure, directly affects the positioning reference of the subsequent outer sector segment 1200. By prioritizing the installation of the inner sector segment 1100, which has lower positioning difficulty, an installation reference surface is established. The subsequent outer sector segment 1200, window segment 1300, and cover plate 1400 use the already installed part as a reference, reducing cumulative errors.

[0079] Step 120: The outer sector segment 1200 is transported to the second mounting position using the Sector Sub Assemble Tool (SSAT). During this process, the external appearance and pose of the outer sector segment 1200 are checked multiple times. Once the distance between the outer sector segment 1200 and the annular lobe meets the standard, the outer sector segment 1200 is fixed and connected to the inner sector segment 1100. The second mounting position is determined based on the first mounting position.

[0080] In practice, the outer sector segment 1200 is transported to the second mounting position outside the vacuum chamber using a sector sub-assembly tool (SSAT). During the process, the appearance and pose are checked multiple times, including but not limited to flatness, parallelism with the inner sector segment 1100, offset, or tilt angle. The detection methods include but are not limited to laser rangefinders, three-dimensional vision inspection systems, or contact displacement sensor arrays. For each stop for inspection, if the error of the inspection result exceeds the set range, the appearance and pose of the outer sector segment 1200 are precisely adjusted and corrected to ensure that the distance between each part of the outer sector segment 1200 and the annular lobe meets the design requirements before it is fixed. The outer sector segment 1200 is then connected to the inner sector segment 1100 to form the main frame of the cold screen.

[0081] During the transportation of the outer sector 1200, the setting principle for multiple pause detection nodes can be based on a fixed distance or a fixed duration, and this application embodiment does not impose any restrictions on this.

[0082] Understandably, the installation accuracy of the outer sector segment 1200, as an inner support structure, needs to be adjusted and determined based on the already installed inner sector segment 1100. The installation accuracy of the outer sector segment 1200 directly affects the positioning reference of the subsequent window segment 1300. By precisely fitting the outer sector segment 1200 and the inner sector segment 1100 together, an installation reference surface is established for the subsequent window segment 1300 and cover plate 1400, reducing cumulative errors.

[0083] It should be noted that the second installation position is a target installation position that is predetermined based on the first installation position through 3D modeling, mathematical calculations and other means.

[0084] Step 130: Hoist the window segment 1300 to the third mounting position and connect it with the outer fan segment 1200, wherein the third mounting position is determined based on the second mounting position.

[0085] In practice, a crane, flexible lifting device, or vacuum suction cup can be used to hoist the window segment 1300 to the third installation position and connect the window segment 1300 to the outer fan segment 1200 to form a functional opening. Furthermore, the coaxiality of the interface between the window segment 1300 and the outer fan segment 1200 can be calibrated using an optical positioning system to increase the installation accuracy of the window segment 1300.

[0086] Understandably, window segment 1300, as a functional module, is installed after the main structure is fixed to avoid early hoisting interfering with the accuracy of the main frame.

[0087] The installation accuracy of window segment 1300, as the neck support structure, needs to be adjusted and determined based on the already installed outer fan segment 1200. The installation accuracy of window segment 1300 directly affects the positioning reference of the subsequent cover plate 1400. By precisely fitting window segment 1300 and outer fan segment 1200 together, an installation reference surface is established for the subsequent cover plate 1400, reducing cumulative errors.

[0088] It should be noted that the third mounting position is a target mounting position determined in advance based on the second mounting position through 3D modeling, mathematical calculations and other means.

[0089] Step 140: Hoist the cover plate 1400 to the fourth mounting position and connect it with the outer fan section 1200 and the window section 1300. The fourth mounting position is determined based on the second and third mounting positions.

[0090] In fact, the cover plate 1400 can be hoisted to the fourth installation position using a crane, flexible lifting tool or vacuum suction cup, and the cover plate 1400 can be connected to the outer fan section 1200 and the window section 1300. The cover plate 1400, the outer fan section 1200 and the window section 1300 form a triangular support system, which can enhance the structural rigidity of the overall cold screen.

[0091] Understandably, the cover plate 1400 serves as an auxiliary reinforcing component, enhancing rigidity after the window segment 1300 is positioned, forming a stable triangular structure, and dispersing local stress. The installation accuracy of the window segment 1300 needs to be adjusted and determined based on the already installed outer fan segment 1200 and window segment 1300, so that the entire sector 1000 can complete the assembly operation smoothly and accurately, and the connection between each component is reliable and stable.

[0092] It should be noted that the fourth installation position is a target installation location pre-determined based on the second and third installation positions through 3D modeling, mathematical calculations, and other means. Since the window segment 1300 and cover plate 1400 are lighter and have higher overall stability compared to the inner fan segment 1100 and outer fan segment 1200, their hoisting difficulty is lower. Therefore, a cumbersome stop-work detection mechanism is unnecessary, or a simple position monitoring system can be introduced according to actual needs.

[0093] The assembly method for the vacuum chamber cold shield provided in this application, through the aforementioned phased stop-work inspection and correction process design, achieves closed-loop control of the entire process of motion, measurement, and correction during assembly. It frequently captures the appearance changes and positional offsets of the inner sector 1100 and the outer sector 1200, ensuring that installation errors are controlled at every stage. This avoids the discovery of irreversible deviations during final assembly, thereby solving the inefficiency problem caused by the traditional post-inspection and rework mode and reducing the risk of collision between the vacuum chamber cold shield and the vacuum chamber due to error accumulation. This comprehensively improves the assembly accuracy and success rate of the vacuum chamber cold shield. At the same time, combined with the installation sequence design of inner sector 1100-outer sector 1200-window sector 1300-cover plate 1400, it effectively reduces the risk of collapse and deformation of the vacuum chamber cold shield due to improper force during transportation, thereby significantly improving the stability and reliability of the vacuum chamber cold shield's structure during assembly. In addition, the massive 1000-sector structure is divided into segments for installation, which reduces the difficulty of installation. Each sector segment can be adjusted and installed independently, reducing mutual interference during the overall installation process and facilitating quality control of each sector segment, thereby improving installation efficiency.

[0094] In some embodiments, such as Figure 2 , Figure 4 and Figure 5 As shown, the inner sector segment 1100 includes two symmetrically arranged inner sub-sectors 1110; before step 110, when the inner sector segment 1100 is transported to the first mounting position using the Sector Sub Assemble Tool (SSAT), the assembly method further includes:

[0095] Two inner fan sections 1110 are assembled to obtain an inner fan section 1100, and the inner fan section 1100 is fixed to the first frame;

[0096] With the appearance and posture of the inner fan segment 1100 and the annular petals meeting the requirements, the first frame is suspended and flipped to adjust the inner fan segment 1100 to a vertical position.

[0097] The inner sector segment 1100 is loaded into the sector subassembly tool (SSAT) by hoisting the first frame.

[0098] In actual implementation, such as Figure 2As shown, after the assembly of the inner sector segment 1100 begins, the two inner sub-sectors 1110 are placed in the pre-rotation area and inspected as required. They are then assembled into the inner sector segment 1100 through bolt tightening, welding, and other methods, and measurements and adjustments are completed. The temperature sensor has also been installed and inspected, confirming that the hoisting equipment can be used normally. For example, a 400t overhead crane can be used for hoisting. The annular segments are fixed and adjusted to meet the requirements on the sector sub-assembly tool (SSAT). Afterwards, the operators check the on-site safety conditions and inspect the structure and performance of the sector sub-assembly tool (SSAT) and the first frame. After confirming that everything is normal, the inner sector segment 1100 is fixed to the first frame. Because the inner sector segment 1100 has poor rigidity, during the hoisting by the overhead crane and the transportation by the sector sub-assembly tool (SSAT), the spatial position and posture of the inner sector segment 1100 are indirectly changed by directly manipulating the first frame. By pre-assembling two inner sector segments 1110 and fixing them to the frame, the basic structure of the inner sector segment 1100 is constructed in advance, avoiding deformation due to insufficient rigidity of the inner sector segment 1100 during subsequent transportation and installation. This also facilitates the overall operation and control of the inner sector segment 1100. The appearance and pose of the inner sector segment 1100 are pre-inspected, as are the appearance and pose of the annular lobes pre-fixed to the sector sub-assembly tool (SSAT). If they do not meet the standards, adjustments and calibrations are performed until the appearance and pose of both the inner sector segment 1100 and the annular lobes meet the design requirements. A crane is then used to suspend and rotate the horizontally placed first frame and the inner sector segment 1100 to a vertical position, aligning the inner sector segment 1100 with the installation direction of the vacuum chamber, facilitating subsequent transportation and fixing operations. The crane or other lifting equipment will lift the inner sector segment 1100 and the first frame, keeping them in a vertical position, and load them onto the Sector Sub Assemble Tool (SSAT). During the lifting process, it is necessary to ensure the stability of the inner sector segment 1100 to avoid shaking or collision. After the inner sector segment 1100 is loaded onto the Sector Sub Assemble Tool (SSAT) with pre-fixed annular lobes, the inner sector segment 1100 will be at the same height as the inner side of the annular lobes. That is, the inner sector segment 1100 has been adjusted to the height of the first installation position. Subsequently, the Sector Sub Assemble Tool (SSAT) only needs to adjust the horizontal position of the inner sector segment 1100, which is at a fixed height and fixed posture.

[0099] It should be noted that before the hoisting operation of the inner sector segment 1100, the operators need to conduct a trial hoisting of it in advance. During the entire trial hoisting process, the appearance and position of the inner sector segment 1100 are monitored in real time. Only after confirming that the inner sector segment 1100 has successfully undergone deformation during the trial hoisting can the formal hoisting be carried out.

[0100] The vacuum chamber cold shield assembly method provided in this application significantly improves the installation accuracy and stability of the inner fan segment 1100 by performing pre-assembly, attitude adjustment, and frame hoisting operations before the installation of the inner fan segment 1100. This effectively solves the problem of the inner fan segment 1100 being prone to deformation during transportation and installation due to insufficient rigidity. Simultaneously, it ensures that the inner fan segment 1100 is aligned with the installation direction of the vacuum chamber, laying a solid foundation for the subsequent installation of other fan segments 1000, such as the outer fan segment 1200, and reducing the risk of overall assembly failure. Furthermore, by disassembling the large single inner fan segment 1100 into two parallel prefabricated inner fan segments 1110, the size and weight of individual components are reduced, facilitating manufacturing, transportation, and handling.

[0101] In some embodiments, the Sector Sub Assemble Tool (SSAT) includes a support rail, a loading platform, and a rotating device; step 110, transporting the inner sector segment 1100 to the first mounting position via the Sector Sub Assemble Tool (SSAT), during which the external pose of the inner sector segment 1100 is paused multiple times and detected, includes:

[0102] The inner sector 1100 is fixed to the loading platform by the first frame;

[0103] The loading platform moves on the support rail, pausing multiple times to check the appearance and pose of the inner sector 1100 until the first frame is coupled with the rotating device.

[0104] The rotating device drives the first frame to rotate. During this period, the inner fan segment 1100 rotates around the fixed axis of the rotating device by a first target angle, and then pauses and detects the appearance and posture of the inner fan segment 1100 until the inner fan segment 1100 reaches the first installation position after rotating by a first set angle.

[0105] In actual operation, the loading platform begins to move on the support rail, proceeding towards the first installation position along a preset path. During this movement, it does not advance continuously but pauses multiple times. At each pause, the appearance and orientation of the inner sector segment 1100 are checked using detection methods (such as laser measurement and visual inspection). Only when the detection results meet the requirements does the loading platform continue moving until the first frame reaches a position where it can be fully coupled with the rotating equipment. Through these multiple pauses and checks, any potential orientation deviations of the inner sector segment 1100 during movement are promptly detected and corrected, ensuring that it maintains the correct position and orientation at all times. Once the first frame is matched with the rotating device, it is driven to rotate around the vertical fixed axis of the rotating device, causing the inner fan segment 1100 to also rotate around the vertical fixed axis. During the rotation, the inner fan segment 1100 pauses once after rotating around the vertical fixed axis by the first target angle, and its appearance and posture are detected. If the detection result exceeds the allowable deviation range, the appearance and posture of the inner fan segment 1100 are adjusted and calibrated until the inner fan segment 1100 reaches the first installation position after rotating the first set angle. The relative position of the inner fan segment 1100 and the ring petals is adjusted by the rotating device to ensure that the inner fan segment 1100 can accurately reach the first installation position. At the same time, multiple pauses are made during the rotation to ensure that the position and posture of the inner fan segment 1100 always meet the requirements, avoiding installation failure due to rotation errors.

[0106] The first set angle can be set according to the position of the first mounting position and the initial position of the inner fan segment 1100 to ensure that the inner fan segment 1100 can accurately reach the first mounting position after rotation and correctly fit with the annular petals. The first target angle can be set according to the installation accuracy requirements of the inner fan segment 1100 and the control capability of the rotating equipment. A smaller first target angle can increase the detection frequency and timely detect and correct deviations, but it will increase the installation time; a larger first target angle will have the opposite effect.

[0107] For example, the first set angle is 78° and the first target angle is 2°.

[0108] The vacuum chamber cold shield assembly method provided in this application, through the coordinated action of the support rail, loading platform, and rotating device of the aforementioned Sector Sub Assemble Tool (SSAT), achieves precise control of the inner sector segment 1100 during transportation and rotation. Multiple pauses to check the appearance and posture effectively avoid error accumulation. The rotational design of the rotating device maintains the vertical posture of the inner sector segment 1100, avoiding uneven structural stress caused by posture changes, ensuring that the inner sector segment 1100 ultimately reaches the first installation position accurately. Overall, this improves the installation accuracy and stability of the inner sector segment 1100, reducing the risk of assembly failure or collision due to positional deviations or posture errors. Furthermore, the inner sector segment 1100 remains in a rigid support state throughout movement and rotation. The stable support of the support rail and rotating device significantly reduces deformation caused by its own weight, ensuring the structural integrity of the inner sector segment 1100 and reducing the risk of collapse.

[0109] In some embodiments, the upper end of the first frame is coupled to the upper output terminal of the rotating device via a first upper adapter, the first upper adapter being pre-installed on the upper end of the first frame, and the lower end of the first frame is coupled to the lower output terminal of the rotating device via a first lower adapter; wherein, as... Figure 2 As shown, before loading the inner sector segment 1100 into the Sector Sub Assemble Tool (SSAT) via the hoisting first frame, the process also includes:

[0110] Install the first adapter onto the loading platform of the Sector Sub Assemble Tool (SSAT);

[0111] Level the upper surface of the first adapter.

[0112] In actual execution, before hoisting the first frame, the first lower adapter is fixed to the loading platform of the Sector Sub Assemble Tool (SSAT), and the upper surface of the first lower adapter is precisely leveled to ensure it is horizontal. This provides a stable and horizontal lower support point for the first frame, preventing the frame from tilting due to uneven loading platform surfaces, thus ensuring that the inner sector segment 1100 maintains a vertical posture during transportation and rotation, reducing positional deviations. The upper end of the first frame is automatically positioned and connected to the upper output end of the rotating equipment via the pre-installed first upper adapter, and the lower end is automatically positioned and connected to the lower output end of the rotating equipment via the first lower adapter, forming a double-point fixing structure. Through the synergistic effect of the upper and lower adapters, the connection rigidity between the first frame and the rotating equipment is enhanced, ensuring the frame remains stable and does not wobble during rotation, while precisely transmitting the driving force of the rotating equipment, achieving precise angle control of the inner sector segment 1100.

[0113] The first upper adapter type may include, but is not limited to, a flange adapter, a pin adapter, or a hydraulic clamping adapter, and the first lower adapter type may include, but is not limited to, a flange adapter, a pin adapter, or a hydraulic clamping adapter. This application embodiment does not impose any restrictions on this.

[0114] The leveling method of the first adapter may include, but is not limited to, laser leveling or electronic leveling, and the embodiments of this application do not limit this.

[0115] The assembly method for the vacuum chamber cold shield provided in this application significantly improves the stability and position control accuracy of the inner sector segment 1100 during transportation and rotation through the precise installation and leveling of the first upper adapter and the first lower adapter. The leveling of the first lower adapter prevents frame tilting due to uneven loading platforms, and the dual-point fixing enhances connection rigidity, ensuring that the inner sector segment 1100 remains vertical and stable during rotation. Overall, this reduces the risk of failure of the inner sector segment 1100 during assembly due to positional deviations or unstable connections, providing a more precise foundation for the subsequent installation of the outer sector segment 1200.

[0116] In some embodiments, such as Figures 3-5 As shown, the outer fan segment 1200 includes two symmetrically arranged outer sub-fans 1210. Step 120, which involves transporting the outer fan segment 1200 to the second mounting position using a Sector Sub Assemble Tool (SSAT), pausing multiple times to check the external position of the outer fan segment 1200, and fixing the outer fan segment 1200 to the inner fan segment 1100 once the distance between the outer fan segment 1200 and the ring lobe meets the requirements, includes:

[0117] Two outer fan segments 1210 are transported to the corresponding area of ​​the second mounting position through the sector sub-assembly tool (SSAT). During this process, the appearance and pose of the current outer fan segment 1210 are checked multiple times. When the distance between the current outer fan segment 1210 and the ring lobe meets the standard, the current outer fan segment 1210 is fixed and connected to the inner fan segment 1100.

[0118] like Figures 3-5 As shown, the external fan 1210 includes two symmetrically arranged sub-boards 1211. The assembly method further includes, before the external fan 1210 is transported to the corresponding area of ​​the second mounting position via a sector sub-assembly tool (SSAT), the assembly method also includes:

[0119] Assemble the two corresponding sub-boards 1211 to obtain the current external fan 1210, and fix the current external fan 1210 to the second frame;

[0120] With the current appearance and position of the outer fan 1210 and the ring petals meeting the requirements, the second frame is suspended and flipped to adjust the current outer fan 1210 to a vertical position.

[0121] The current external sector 1210 is loaded into the Sector Sub Assemble Tool (SSAT) by hoisting the second frame.

[0122] In actual implementation, such as Figure 2As shown, after the assembly of the outer fan segment 1200 begins, the four inner fan segments 1110 are placed in the pre-rotation area and inspected as required. They are then assembled in pairs into two outer fan segments 1210 through bolt tightening and welding, and measurements and adjustments are completed. The temperature sensor has also been installed and inspected, confirming that the hoisting equipment is functioning correctly (e.g., a 400t overhead crane). The inner fan segment 1100 and the ring petals are fixed and adjusted to acceptable condition on the Sector Sub-Assemble Tool (SSAT). Afterwards, the operators check the site safety conditions and inspect the structure and performance of the Sector Sub-Assemble Tool (SSAT) and the second frame. Once confirmed to be normal, the first outer fan segment 1210 is fixed to the second frame. Due to the relatively poor rigidity of the outer fan segment 1210, during the overhead crane hoisting and transport process using the Sector Sub-Assemble Tool (SSAT), the spatial position and orientation of the outer fan segment 1210 are indirectly changed by directly manipulating the second frame. The appearance and orientation of the first outer sector 1210 are pre-tested, and the appearance and orientation of the annular lobe pre-fixed to the Sector Sub Assemble Tool (SSAT) are also tested. If they do not meet the standards, adjustments and calibrations are performed until the appearance and orientation of both the first outer sector 1210 and the annular lobe meet the design requirements. A crane is then used to suspend and rotate the horizontally placed first frame and the first outer sector 1210 to a vertical position, aligning the first outer sector 1210 with the installation direction of the vacuum chamber for easier subsequent transport and fixing. The crane and other lifting equipment lift the first outer sector 1210 and the first frame, which are held vertically, and load them onto the Sector Sub Assemble Tool (SSAT). During the lifting process, the stability of the first outer sector 1210 must be ensured to avoid shaking or collisions. Once the first outer sector 1210 is loaded into the sector sub-assembly tool (SSAT) with pre-fixed ring lobes, the first outer sector 1210 can be kept at the same height level as the inner side of the ring lobes. That is, the first outer sector 1210 has been adjusted to the height of the area corresponding to the first mounting position. The sector sub-assembly tool (SSAT) only needs to adjust the position of the first outer sector 1210 with the fixed height and fixed posture on the horizontal plane.

[0123] Because the outer sector segment 1200 assembly may interfere with the neck tube at the lower window of the vacuum chamber, and is also highly likely to interfere with the sector sub-assembly tool (SSAT), the two outer sector segments 1210 are installed sequentially. The installation of the second outer sector segment 1210 begins after the installation of the first outer sector segment 1210. The second outer sector segment 1210 is fixed to the second frame, and the appearance and pose of the second outer sector segment 1210 are pre-tested. The appearance and pose of the annular lobe pre-fixed to the sector sub-assembly tool (SSAT) are also tested. If they do not meet the standards, adjustments and calibrations are performed until the appearance and pose of the second outer sector segment 1210 and the annular lobe both meet the design requirements. The horizontally placed second frame and the second outer sector segment 1210 are then suspended and rotated to a vertical position using a crane, aligning the second outer sector segment 1210 with the installation direction of the vacuum chamber, facilitating subsequent transportation and fixing operations. Cranes and other lifting equipment will lift the second outer sector 1210 and the second frame, which are in a vertical position, and load them onto the sector sub-assembly tool (SSAT).

[0124] It should be noted that before carrying out the hoisting operation of the outer partition 1210, the operators need to conduct a trial hoisting of it in advance. During the entire trial hoisting process, the appearance and position of the outer partition 1210 should be monitored in real time. Only after confirming that the outer partition 1210 has successfully completed the trial hoisting without deformation can the formal hoisting begin.

[0125] The vacuum chamber cold shield assembly method provided in this application significantly improves the installation accuracy and stability of the outer fan segment 1200 by performing pre-assembly, attitude adjustment, and frame hoisting operations before installing a single outer fan 1210, combined with the process design of independently installing two outer fan segments 1210 sequentially. This method meets the requirements of avoiding collisions between the vacuum chamber and the sector sub-assembly tool (SSAT). It effectively solves the problem of easy deformation of the outer fan segment 1200 during transportation and installation due to insufficient rigidity, avoiding rework caused by deformation. At the same time, it ensures that the installation direction of the outer fan segment 1200 is consistent with that of the vacuum chamber, laying a good foundation for the subsequent installation of the window segment 1300 and the cover plate 1400, and reducing the risk of overall assembly failure. Furthermore, the large single outer fan segment 1200 is disassembled into four parallel prefabricated sub-plates 1211, reducing the size and weight of individual components and facilitating manufacturing, transportation, and handling.

[0126] In some embodiments, the Sector Sub Assemble Tool (SSAT) includes a support rail, a loading platform, and a rotating device. The process of transporting the outer sector 1210 to the corresponding area of ​​the second mounting position via the SSAT involves multiple pauses and checks of the current external sector 1210's appearance and orientation, including:

[0127] The current external fan 1210 is fixed to the loading platform via the second frame;

[0128] The loading platform moves on the support rail, pausing multiple times to check the current appearance and pose of the outer fan 1210 until the second frame is coupled with the rotating device.

[0129] The rotating device drives the second frame to rotate. During this process, the current outer fan 1210 rotates around the fixed axis of the rotating device by a second target angle. The device pauses and detects the appearance and pose of the current outer fan 1210 until the current outer fan 1210 reaches the corresponding area of ​​the second installation position after rotating by a second set angle.

[0130] In actual operation, the loading platform begins to move on the support rail, proceeding towards the second installation position along a preset path. During this movement, it does not advance continuously but pauses multiple times. At each pause, detection methods (such as laser measurement and visual inspection) are used to check the current appearance and orientation of the outer fan 1210. Only when the detection results meet the requirements does the loading platform continue moving until the second frame reaches a position where it can be fully coupled with the rotating equipment. Through multiple pauses and checks, any potential orientation deviations of the outer fan 1210 during movement are promptly detected and corrected, ensuring that it maintains the correct position and orientation at all times. Once the second frame is matched with the rotating device, it is driven to rotate around the vertical fixed axis of the rotating device. This causes the current outer fan 1210 to also rotate around the vertical fixed axis. During rotation, the outer fan 1210 pauses once after rotating around the vertical fixed axis by the second target angle, and its appearance and posture are checked. If the check result exceeds the allowable deviation range, the appearance and posture of the outer fan 1210 are adjusted and calibrated until it reaches the corresponding position of the second mounting position after rotating the second set angle. The relative position of the outer fan 1210 and the ring petals is adjusted by the rotating device to ensure that the outer fan 1210 accurately reaches the corresponding position of the second mounting position. Simultaneously, multiple pauses during rotation ensure that the position and posture of the outer fan 1210 always meet the requirements, avoiding installation failure due to rotation errors.

[0131] The second setting angle can be set according to the position of the second mounting position and the initial position of the outer fan 1210, ensuring that the outer fan 1210 can accurately reach the corresponding position of the second mounting position after rotation and correctly fit with the ring lobe. The second target angle can be set according to the installation accuracy requirements of the outer fan 1210 and the control capability of the rotating equipment. A smaller second target angle can increase the detection frequency and timely detect and correct deviations, but will increase the installation time; a larger second target angle has the opposite effect.

[0132] For example, the second set angle is 73° and the second target angle is 1°.

[0133] The vacuum chamber cold shield assembly method provided in this application, through the coordinated action of the support rail, loading platform, and rotating device of the aforementioned Sector Sub Assemble Tool (SSAT), achieves precise control of the outer fan 1210 during transportation and rotation. Multiple pauses to check the appearance and posture effectively avoid error accumulation. The rotational design of the rotating device maintains the vertical posture of the outer fan 1210, avoiding uneven structural stress caused by posture changes. This ensures that the outer fan 1210 accurately reaches the corresponding position of the second installation location, improving the overall installation accuracy and stability of the outer fan segment 1200 and reducing the risk of assembly failure or collision due to positional deviations or posture errors. Furthermore, the outer fan 1210 remains in a rigid support state during movement and rotation. The stable support of the support rail and rotating device significantly reduces deformation caused by its own weight, ensuring the structural integrity of the outer fan segment 1200 and reducing the risk of collapse deformation.

[0134] In some embodiments, the upper end of the second frame is coupled to the upper output terminal of the rotating device via a second upper adapter, the second upper adapter being pre-installed on the upper end of the second frame, and the lower end of the second frame is coupled to the lower output terminal of the rotating device via a second lower adapter; wherein, as... Figure 3 As shown, before loading the current external sector 1210 into the sector sub-assembly tool (SSAT) by hoisting the second frame, the process also includes:

[0135] Install the second adapter onto the loading platform of the Sector Sub Assemble Tool (SSAT);

[0136] Level the upper surface of the second adapter.

[0137] In actual execution, before hoisting the second frame, the second lower adapter is fixed to the loading platform of the Sector Sub Assemble Tool (SSAT), and the upper surface of the second lower adapter is precisely leveled to ensure it is horizontal. This provides a stable and horizontal lower support point for the second frame, preventing the frame from tilting due to uneven loading platform surfaces, thus ensuring that the outer fan 1210 maintains a vertical posture during transportation and rotation, reducing positional deviations. The upper end of the second frame is automatically positioned and connected to the upper output end of the rotating equipment via the pre-installed second upper adapter, and the lower end is automatically positioned and connected to the lower output end of the rotating equipment via the second lower adapter, forming a double-point fixing structure. Through the synergistic effect of the upper and lower adapters, the connection rigidity between the second frame and the rotating equipment is enhanced, ensuring the second frame remains stable and does not wobble during rotation, while precisely transmitting the driving force of the rotating equipment, achieving precise angle control of the outer fan 1210.

[0138] The second upper adapter type may include, but is not limited to, a flange adapter, a pin adapter, or a hydraulic clamping adapter, and the second lower adapter type may include, but is not limited to, a flange adapter, a pin adapter, or a hydraulic clamping adapter. This application embodiment does not impose any restrictions on this.

[0139] The leveling method of the second adapter may include, but is not limited to, laser leveling or electronic leveling, and the embodiments of this application do not limit this.

[0140] The assembly method for the vacuum chamber cold shield provided in this application significantly improves the stability and position control accuracy of the outer fan 1210 during transportation and rotation through the precise installation and leveling of the second lower adapter, combined with the dual-point fixing design of the upper and lower adapters. The leveled second lower adapter provides horizontal support for the second frame, preventing frame tilting due to uneven loading platforms. The synergistic effect of the upper and lower adapters enhances connection rigidity, ensuring that the outer fan 1210 maintains a vertical posture without wobbling during rotation. Overall, this reduces the risk of failure of the outer fan 1210 during assembly due to positional deviations or unstable connections, ensuring precise docking of the outer fan 1210 with the inner fan segment 1100 and the vacuum chamber annular lobe, and enhancing the overall structural strength and thermal insulation performance of the vacuum chamber cold shield.

[0141] In some embodiments, such as Figure 2 As shown, the assembly method further includes the following steps before the inner sector 1100 is delivered to the first mounting position via the Sector SubAssemble Tool (SSAT):

[0142] The first temporary support is installed in the area outside the annular petiole corresponding to the first installation position, and the height of the first temporary support is adjusted to the first target height;

[0143] And, such as Figure 3 As shown, the assembly method further includes the following steps before the outer sector segment 1200 is transported to the second mounting position via the Sector Sub Assemble Tool (SSAT):

[0144] The second temporary support is installed outside the annular petiole in the area corresponding to the second installation position, and the height of the second temporary support is adjusted to the second target height.

[0145] The first and second temporary supports can be designed as structures that can be quickly assembled and disassembled, such as clamps, etc., and the embodiments of this application do not limit this.

[0146] The first target height is greater than the minimum gap between the inner sector 1100 and the vacuum chamber, and the second target height is greater than the minimum gap between the outer sector 1200 and the vacuum chamber, in order to prevent interference between the inner sector 1100 and the outer sector 1200 and the vacuum chamber, and to ensure the thermal insulation performance of the vacuum chamber cold shield.

[0147] The height can be adjusted by means of manual adjustment, electric control or hydraulic control, etc., and the embodiments of this application do not limit this.

[0148] The vacuum chamber cold shield assembly method provided in this application embodiment uses pre-set first and second temporary supports in the areas corresponding to the first and second mounting positions on the vacuum chamber. These provide auxiliary support for the inner sector segment 1100 and outer sector segment 1200, independent of the sector sub-assembly tool (SSAT), reducing equipment fatigue wear. Simultaneously, the rigid support of the first and second temporary supports reduces deformation of the inner sector segment 1100 and outer sector segment 1200 due to their own weight, providing a stable reference for subsequent connection processes. The height adjustment accuracy of the temporary supports provides a preset elevation reference for the sector segments, complementing the aforementioned testing and calibration system. This reduces foundation elevation errors before the inner sector segment 1100 and outer sector segment 1200 are in place, further improving the accuracy and stability of the cold shield assembly.

[0149] In some embodiments, such as Figure 2 As shown, step 110, fixing the inner sector segment 1100, includes:

[0150] Temporarily fix the inner sector segment 1100 to the first temporary bracket pre-installed on the annular petal;

[0151] And, such as Figure 3As shown, step 120, fixing the outer fan segment 1200 and connecting it to the inner fan segment 1100, includes:

[0152] The outer fan section 1200 is temporarily fixed to the second temporary bracket pre-installed on the ring petal, and sealed to the inner fan section 1100 through the insulating pad 1001 and bolts;

[0153] A reinforcing block 1002 is embedded between the outer sector 1200 and the inner sector 1100, and the reinforcing block 1002 is fastened to the outer sector 1200 and the inner sector 1100 by bolts.

[0154] For example, the temporary fixation of the first temporary support, the inner sector 1100, and the annular petals can be achieved by using a combination of positioning pins and quick clamps.

[0155] In fact, by utilizing the supporting role of the first and second temporary supports, the inner sector 1100 and the outer sector 1200 are prevented from sinking or shifting due to gravity or external forces, thus providing a basis for subsequent precise adjustment and permanent fixation.

[0156] The insulating pad 1001 can be made of high-temperature resistant and low-thermal-conductivity insulating materials, such as glass fiber reinforced polytetrafluoroethylene, to ensure sealing while preventing heat conduction. This application does not limit this.

[0157] The reinforcing block 1002 can be made of a high-temperature resistant, low thermal and magnetic conductivity insulating material, such as G10 block (glass fiber epoxy resin composite material). This application embodiment does not limit this.

[0158] In this embodiment, such as Figures 4-6 As shown, the two inner fan sections 1110 that make up the inner fan section 1100 can be sealed together by insulating pads 1001 and bolts. The two outer fan sections 1210 that make up the outer fan section 1200 can also be sealed together by insulating pads 1001 and bolts. The two sub-plates 1211 that make up the outer fan section 1210 can also be sealed together by insulating pads 1001 and bolts. A groove can be formed at the corner junction of two adjacent sub-plates 1211 and the corresponding inner fan section 1110. The reinforcing block 1002 can be embedded in the groove and fastened by bolts. The reinforcing block 1002 is connected to the three insulating pads 1001 at that location, so that the inner fan section 1100 and the outer fan section 1200 form a whole, improving the rigidity of the entire fan section 1000.

[0159] Understandably, the outer sector 1200 and inner sector 1100 are sealed together by the insulating pad 1001 and bolts, and reinforced by the reinforcing block 1002. This ensures the sealing of the connection and the structural strength, preventing heat exchange between the high-temperature plasma and the external superconducting magnet. The low thermal conductivity of the insulating pad 1001 further reduces heat conduction, protecting the ultra-low temperature environment of the superconducting magnet. Simultaneously, the sealed connection prevents the high vacuum environment inside the vacuum chamber from being disrupted, maintaining the normal progress of the nuclear fusion reaction and meeting the requirements of the ultra-high vacuum environment of the nuclear fusion device. Furthermore, the use of the insulating pad 1001 and the reinforcing block 1002 effectively blocks the conductive path between the inner sector 1100 and the outer sector 1200, increases the insulation resistance, and blocks the eddy current path, thereby effectively preventing the formation of eddy currents on the cold screen of the vacuum chamber by the strong magnetic field generated by the superconducting magnet, thus reducing energy loss.

[0160] In some embodiments, such as Figure 4 and Figure 5 As shown, the window segment 1300 includes two symmetrically arranged branch pipe segments 1310, and the cover plate 1400 includes two symmetrically arranged plate segments 1410.

[0161] Step 130, hoisting the window segment 1300 to the third installation position and connecting it to the outer fan segment 1200, includes:

[0162] First, hoist the first branch pipe section 1310 to the corresponding area of ​​the third installation position and connect it with the outer fan section 1200;

[0163] The second pipe section 1310 is then hoisted to the corresponding area of ​​the third installation position and connected to the outer fan section 1200. The first pipe section 1310 and the second pipe section 1310 are connected to form the window section 1300, so that the window section 1300 is fitted outside the neck tube of the annular petal.

[0164] And step 140, hoisting the cover plate 1400 to the fourth installation position and connecting it to the outer sash section 1200 and the window section 1300, includes:

[0165] First, hoist the first panel segment 1410 to the corresponding area of ​​the fourth installation position and connect it with the outer fan segment 1200 and the window segment 1300;

[0166] The second segment 1410 is then hoisted to the corresponding area of ​​the fourth installation position and connected to the outer fan segment 1200 and the window segment 1300, connecting the first segment 1410 and the second segment 1410 to form the cover plate 1400.

[0167] In actual implementation, such as Figure 4 and Figure 5As shown, after confirming that the annular segment is fixed in place and adjusted correctly on the Sector Sub Assemble Tool (SSAT), and that both the inner sector segment 1100 and the outer sector segment 1200 have been assembled, the operator checks the on-site safety conditions and inspects the structure and performance of the hoisting equipment and the corresponding hoisting frame. After confirming that everything is normal, the first sub-segment 1310 is moved to the hoisting position. The hoisting equipment lifts the first sub-segment 1310 and hoists it to the corresponding area of ​​the third installation position. The first sub-segment 1310 is then connected to the insulating pad 1001 using bolts. The outer fan section 1200 is connected, and then the second branch pipe section 1310 is moved to the hoisting position. The hoisting equipment lifts the second branch pipe section 1310 and hoists it to the corresponding area of ​​the third installation position. The second branch pipe section 1310 is connected to the outer fan section 1200 by bolts and insulating gaskets 1001. The first branch pipe section 1310 and the second branch pipe section 1310 are connected and assembled by bolts and insulating gaskets 1001 to form a window section 1300 suitable for being fitted outside the neck tube of the annular petals.

[0168] like Figure 4 and Figure 5 As shown, after confirming that the annular segment is fixed in place and adjusted correctly on the Sector Sub Assemble Tool (SSAT), and that the inner sector segment 1100, outer sector segment 1200, and window segment 1300 have all been assembled, the operator checks the on-site safety conditions and inspects the structure and performance of the hoisting equipment and the corresponding hoisting frame. After confirming that everything is normal, the first segment 1410 is moved to the hoisting position. The hoisting equipment lifts the first segment 1410 and hoists it to the corresponding area of ​​the fourth installation position. The first segment 1410 is then connected to the outer sector sub-segment using bolts and insulating pads 1001. The sash segment 1200 and the window segment 1300 are connected. Then, the second sub-segment segment 1410 is moved to the hoisting position. The hoisting equipment lifts the second sub-segment segment 1410 and hoists it to the corresponding area of ​​the fourth installation position. The second sub-pipe segment 1310 is connected to the outer sash segment 1200 and the window segment 1300 by bolting and connecting the insulating pad 1001. The first sub-segment segment 1410 and the second sub-segment segment 1410 are connected and assembled by bolting and connecting the insulating pad 1001 to form a cover plate 1400 suitable for being set at the triangular support in the middle position.

[0169] It should be noted that before carrying out the hoisting operation of the pipe section 1310 and the plate section 1410, the operators need to conduct a trial hoisting beforehand. During the entire trial hoisting process, the appearance and position of the pipe section 1310 and the plate section 1410 should be monitored in real time. Only after confirming that the pipe section 1310 and the plate section 1410 have successfully undergone deformation during the trial hoisting can the formal hoisting be carried out.

[0170] By decomposing the window segment 1300 into symmetrical pipe segments 1310 and the cover plate 1400 into symmetrical plate segments 1410, and while meeting the avoidance requirements of the annular flange neck, the two pipe segments 1310 and the two plate segments 1410 can be prefabricated in parallel. This reduces the size and weight of individual components, facilitating manufacturing, transportation, and handling. Furthermore, the step-by-step connection allows for real-time monitoring and adjustment, avoiding rework due to excessive deviations after overall installation.

[0171] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0172] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0173] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0174] In the description of this application, "multiple" means two or more.

[0175] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0176] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0177] Other configurations of the embodiments of this application, such as ... and ..., and operations, are known to those skilled in the art and will not be described in detail here.

[0178] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0179] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for assembling a vacuum chamber cooling shield, characterized in that, The vacuum chamber cold shield is fitted outside the vacuum chamber, which is composed of multiple annular lobes, and includes multiple sectors spliced ​​along the circumferential direction. Each sector includes an inner sector segment, an outer sector segment, a window segment, and a cover plate. The fitting method includes: The inner sector segment is transported to the first installation position using a sector pre-assembly tool. During this process, the process is paused multiple times to check the appearance and orientation of the inner sector segment. Once the distance between the inner sector segment and the annular petal meets the standard, the inner sector segment is fixed. The outer fan segment is transported to the second mounting position using the sector pre-assembly tool. During this process, the external fan segment's appearance and orientation are checked multiple times. Once the distance between the outer fan segment and the annular lobe meets the standard, the outer fan segment is fixed and connected to the inner fan segment. The second mounting position is determined based on the first mounting position. The window segment is hoisted to the third mounting position and connected to the outer fan segment, wherein the third mounting position is determined based on the second mounting position; The cover plate is hoisted to the fourth mounting position and connected to the outer fan section and the window section, wherein the fourth mounting position is determined based on the second mounting position and the third mounting position.

2. The method for assembling a vacuum chamber cold shield according to claim 1, characterized in that, The inner sector includes two symmetrically arranged inner sub-sectors; Before the inner sector segment is transported to the first mounting position via the sector pre-assembly tool, the assembly method further includes: The two inner fan sections are assembled to form the inner fan segment, and the inner fan segment is fixed to the first frame; If the appearance and orientation of the inner fan segment and the annular petals meet the requirements, the first frame is suspended and flipped to adjust the inner fan segment to a vertical position. The inner sector segment is loaded into the sector pre-assembly tool by hoisting the first frame.

3. The method for assembling a vacuum chamber cold shield according to claim 2, characterized in that, The sector pre-assembly tool includes a support rail, a loading platform, and a rotating device; The process of transporting the inner sector segment to the first mounting position using a sector pre-assembly tool, with multiple pauses and checks on the appearance and pose of the inner sector segment during the process, includes: The inner sector is fixed to the loading platform by the first frame; The loading platform moves on the support track, pausing multiple times to detect the appearance and pose of the inner sector until the first frame is coupled to the rotating device. The rotating device drives the first frame to rotate. During this period, the inner fan segment rotates around the fixed axis of the rotating device by a first target angle, and the device pauses and detects the appearance and posture of the inner fan segment until the inner fan segment reaches the first installation position after rotating by a first set angle.

4. The method for assembling a vacuum chamber cold shield according to claim 3, characterized in that, The upper end of the first frame is coupled to the upper output end of the rotating device via a first upper adapter, the first upper adapter being pre-installed on the upper end of the first frame, and the lower end of the first frame is coupled to the lower output end of the rotating device via a first lower adapter; wherein, before loading the inner sector segment into the sector pre-assembly tool by hoisting the first frame, the process further includes: The first lower adapter is installed on the loading platform of the sector pre-assembly tool; The upper surface of the first lower adapter is leveled.

5. The method for assembling a vacuum chamber cold shield according to claim 1, characterized in that, The outer fan segment includes two symmetrically arranged outer fans. The process of transporting the outer fan segment to the second mounting position using the sector pre-assembly tool, pausing multiple times during this process to check the appearance and orientation of the outer fan segment, and fixing the outer fan segment and connecting it to the inner fan segment once the distance between the outer fan segment and the annular petals meets the standard includes: The two outer fan sections are transported to the corresponding area of ​​the second installation position through the sector pre-assembly tool. During this process, the appearance and position of the current outer fan section are checked multiple times. When the distance between the current outer fan section and the ring petal meets the standard, the current outer fan section is fixed and connected to the inner fan section. The external fan includes two symmetrically arranged sub-boards, wherein, before the external fan is transported to the corresponding area of ​​the second mounting position by the sector pre-assembly tool, the assembly method further includes: The two corresponding sub-boards are assembled to obtain the current outer fan, and the current outer fan is fixed to the second frame; If the current appearance and position of the outer fan and the annular petals meet the requirements, the second frame is suspended and flipped to adjust the current outer fan to a vertical position; The current external sector is loaded into the sector pre-assembly tool by hoisting the second frame.

6. The method for assembling a vacuum chamber cold shield according to claim 5, characterized in that, The sector pre-assembly tool includes a support rail, a loading platform, and a rotating device. The external sector is transported to the corresponding area of ​​the second mounting position via the sector pre-assembly tool, with multiple pauses and checks on the current external sector's appearance and orientation during this process, including: The current external fan is fixed to the loading platform by the second frame; The loading platform moves on the support track, pausing multiple times to detect the current appearance and pose of the outer fan, until the second frame is coupled to the rotating device. The rotating device drives the second frame to rotate. During this period, the current outer fan rotates around the fixed axis of the rotating device by a second target angle, and then pauses and detects the appearance and posture of the current outer fan until the current outer fan rotates by a second set angle and reaches the corresponding area of ​​the second mounting position.

7. The method for assembling a vacuum chamber cold shield according to claim 6, characterized in that, The upper end of the second frame is coupled to the upper output end of the rotating device via a second upper adapter, the second upper adapter being pre-installed on the upper end of the second frame, and the lower end of the second frame is coupled to the lower output end of the rotating device via a second lower adapter; wherein, before loading the current external sector onto the sector pre-assembly tool by hoisting the second frame, the process further includes: The second lower adapter is installed on the loading platform of the sector pre-assembly tool; Level the upper surface of the second lower adapter.

8. The method for assembling the vacuum chamber cold shield according to any one of claims 1-7, characterized in that, Before the inner sector segment is transported to the first mounting position via the sector pre-assembly tool, the assembly method further includes: The first temporary bracket is installed outside the annular petal in the area corresponding to the first installation position, and the height of the first temporary bracket is adjusted to the first target height; Furthermore, prior to conveying the outer sector segment to the second mounting position via the sector pre-assembly tool, the assembly method further includes: The second temporary bracket is installed outside the annular petal in the area corresponding to the second mounting position, and the height of the second temporary bracket is adjusted to the second target height.

9. The method for assembling a vacuum chamber cold shield according to claim 8, characterized in that, The step of fixing the inner sector segment includes: The inner fan segment is temporarily fixed to the first temporary bracket pre-installed on the annular petal; And, fixing the outer sector segment and connecting it to the inner sector segment includes: The outer fan segment is temporarily fixed to the second temporary bracket pre-installed on the annular petal, and sealed to the inner fan segment by means of an insulating pad and bolts; A reinforcing block is embedded between the outer sector segment and the inner sector segment, and the reinforcing block is fastened to the outer sector segment and the inner sector segment by bolts.

10. The method for assembling the vacuum chamber cold shield according to any one of claims 1-7, characterized in that, The window segment includes two symmetrically arranged pipe segments, and the cover plate includes two symmetrically arranged plate segments; The step of hoisting the window segment to the third mounting position and connecting it to the outer fan segment includes: First, the first pipe section is hoisted to the corresponding area of ​​the third installation position and connected to the outer fan section; The second pipe section is then hoisted to the corresponding area of ​​the third installation position and connected to the outer fan section. The first and second pipe sections are connected to form the window section, so that the window section is fitted outside the neck of the annular petal. And, the step of hoisting the cover plate to the fourth installation position and connecting it to the outer fan section and the window section includes: First, the first segment is hoisted to the corresponding area of ​​the fourth installation position and connected to the outer fan segment and the window segment; The second segment is then hoisted to the corresponding area of ​​the fourth installation position and connected to the outer fan segment and the window segment, thus connecting the first and second segments to form the cover plate.

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