Welding aid for fusion devices

Abstract

The application discloses a welding auxiliary device for a fusion device, which comprises a protective frame, the protective frame comprises a bottom plate and at least two first rib plates, the at least two first rib plates are arranged on the bottom plate at intervals and define a protective cavity between the bottom plate and the at least two first rib plates, the protective frame is provided with an air exchange opening, the air exchange opening is communicated with the protective cavity, and the protective cavity is adapted to be filled with inert gas through the air exchange opening; wherein the protective frame is adapted to be detachably installed into a gap between a vacuum chamber assembly and a cold shield assembly, the first rib plates can abut against the vacuum chamber assembly, and the protective cavity corresponds to a position of a weld on the vacuum chamber assembly. According to the welding auxiliary device for the fusion device, an independent space can be formed in the gap to cover the outside of the weld by arranging the protective frame, heat can be insulated, impurities can be insulated, the welding difficulty can be reduced, the weld quality can be improved, and the working efficiency and service life of each component can be ensured.

Description

Technical Field

[0001] This invention relates to the field of welding auxiliary technology, and in particular to a welding auxiliary device for fusion devices. Background Technology

[0002] During the ring-closing phase of a fusion device, the vacuum chamber needs to be welded on its inner side, while the cold shield needs to be pre-installed on the outer side of the vacuum chamber. In existing fusion devices, the gap between the cold shield and the vacuum chamber is small, and the gap is filled with pipes and precision sensors. This results in uneven distribution of inert gas within the gap, making it difficult to protect the weld. Consequently, a large amount of welding heat is transferred to the cold shield, easily damaging it. Furthermore, welding fumes, dust, or water vapor meet and adhere to the gap, making them difficult to clean. This increases the difficulty of welding, affects the quality of the weld, and impacts the working efficiency and service life of various components of the fusion device (such as the vacuum chamber and cold shield), indicating room for improvement. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a welding auxiliary device for a fusion device, which can reduce welding difficulty, improve weld quality, and ensure the working efficiency and service life of various components of the fusion device.

[0004] According to an embodiment of the present invention, a welding auxiliary device for a fusion device includes a vacuum chamber assembly and a cold shield assembly located on its outer periphery. The device includes a protective frame comprising a base plate and at least two first ribs, the at least two first ribs being spaced apart from each other on the base plate and defining a protective cavity between them. The protective frame has a vent, which communicates with the protective cavity, and the protective cavity is adapted to allow inert gas to be introduced through the vent. The protective frame is adapted to be detachably installed within the gap between the vacuum chamber assembly and the cold shield assembly, the first ribs being able to press against the vacuum chamber assembly, and the protective cavity corresponding to the weld position on the vacuum chamber assembly.

[0005] According to an embodiment of the present invention, a welding auxiliary device for a fusion device, by providing a detachable protective frame installed in the gap, and the protective frame having a protective cavity corresponding to the weld position, can form a smaller independent space in the gap to cover and seal the outside of the weld. This can isolate the heat generated by welding, prevent the cold shield from deforming and being damaged due to local overheating when the coolant is not flowing, and isolate impurities such as welding fumes, dust, or water vapor, preventing impurities from adhering to the gap and affecting the working effect of the fusion device. At the same time, it can allow inert gas to fill the protective cavity evenly, which can protect the weld, thereby reducing the welding difficulty, improving the weld quality, and ensuring the working efficiency and service life of each component of the fusion device.

[0006] According to some embodiments of the present invention, the protective frame further includes at least one second rib, which is disposed on the base plate and located between two adjacent first ribs. The vacuum chamber assembly has a splice plate with the welds on both sides of the splice plate, and the second rib can press against the splice plate.

[0007] According to some embodiments of the present invention, the welding auxiliary device further includes: at least one first inflation member, the first inflation member being disposed on the side of the base plate opposite to the first rib, and the first inflation member and the base plate being detachably connected; wherein the first inflation member has a first inflation port.

[0008] In some embodiments, the welding auxiliary device further includes: two second inflatable members, which are respectively disposed on opposite sides of the two first ribs, and the two second inflatable members are detachably connected to the first ribs; wherein the second inflatable members have second inflatable ports.

[0009] In some embodiments, the first inflatable member and the base plate are bonded together; and / or, the second inflatable member and the first rib are bonded together.

[0010] In some embodiments, the first inflatable member has a first positioning portion, the base plate has a first mating portion, and the first positioning portion and the first mating portion are mated together; and / or, the second inflatable member has a second positioning portion, the first rib has a second mating portion, and the second positioning portion and the second mating portion are mated together.

[0011] In some embodiments, the first inflatable component is at least one of a flexible material such as halogen-free PA66, polyimide, or low-chlorine vapor phase adhesive; and / or, the second inflatable component is at least one of a flexible material such as halogen-free PA66, polyimide, or low-chlorine vapor phase adhesive; and / or, the protective frame is at least one of a high-temperature resistant material such as ceramic fiber with adhesive or polytetrafluoroethylene.

[0012] According to some embodiments of the present invention, the welding auxiliary device further includes: a camera device disposed on the protective frame for observing the weld pool and the degree of weld formation; and / or, it further includes: a temperature sensor disposed on the protective frame for detecting the weld temperature and the gas temperature in the protective cavity; and / or, it further includes: a pressure sensor disposed on the protective frame for detecting the gas pressure in the protective cavity.

[0013] According to some embodiments of the present invention, the end of the protective frame has an abutment portion, and the protective frame is adapted to abut against the inner wall surface of the cold shield assembly and / or the outer wall surface of the vacuum chamber assembly through the abutment portion within the gap.

[0014] According to some embodiments of the present invention, the protective frame includes multiple protective frames that are rotatably connected along the length of the protective frame, wherein the length of each protective frame is less than the length of the fan-shaped side at the minimum bending radius of the cold shield assembly, so that the protective frame can enter and exit the gap.

[0015] Additional aspects and advantages of the invention 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 the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the structure of a welding auxiliary device according to some embodiments of the present invention;

[0018] Figure 2 This is a partial structural schematic diagram of a welding auxiliary device according to some embodiments of the present invention from one perspective;

[0019] Figure 3 This is a partial structural schematic diagram of a welding auxiliary device according to some embodiments of the present invention from another perspective;

[0020] Figure 4 This is a schematic diagram of the operation of a welding auxiliary device according to some embodiments of the present invention;

[0021] Figure 5 This is a schematic diagram of the installation of a welding auxiliary device according to some embodiments of the present invention from one viewpoint;

[0022] Figure 6 This is a schematic diagram of the installation of a welding auxiliary device according to some embodiments of the present invention from another perspective;

[0023] Figure 7 This is a schematic diagram of the installation of a welding auxiliary device according to some embodiments of the present invention from another perspective.

[0024] Figure 8 This is a schematic diagram of the installation of a welding auxiliary device according to some embodiments of the present invention from another perspective.

[0025] Figure 9 This is a schematic diagram of the structure of a fusion device according to some embodiments of the present invention;

[0026] Figure 10 This is a schematic diagram of the structure of a vacuum chamber assembly according to some embodiments of the present invention;

[0027] Figure 11 This is a schematic diagram of the structure of a vacuum chamber unit according to some embodiments of the present invention;

[0028] Figure 12 This is a structural schematic diagram of a splicing panel according to some embodiments of the present invention;

[0029] Figure 13 This is a partial structural schematic diagram of a fusion device according to some embodiments of the present invention from one viewpoint;

[0030] Figure 14 This is a partial structural schematic diagram of a fusion device according to some embodiments of the present invention from another perspective.

[0031] Figure label:

[0032] Fusion device 1000, welding auxiliary device 100,

[0033] Vacuum chamber assembly 200, vacuum chamber unit 210, splicing plate 220, weld seam 230.

[0034] The cold screen assembly is 300mm, and the gap is 400mm.

[0035] Protective frame 10, first rib 11, second rib 12, base plate 13, first mating part 131, abutting part 132.

[0036] 14 protective frame, 15 protective cavity, 16 ventilation port.

[0037] First inflation component 20, first inflation port 21, second inflation component 30, second inflation port 31, camera device 40. Detailed Implementation

[0038] Embodiments of the present invention 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 the present invention, and should not be construed as limiting the present invention.

[0039] In the description of this invention, 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," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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 the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] The following is for reference. Figures 1-14 A welding auxiliary device 100 for a fusion device 1000 according to an embodiment of the present invention is described.

[0042] like Figures 1-14 As shown, according to an embodiment of the present invention, a welding auxiliary device 100 for a fusion device 1000 is provided. The fusion device 1000 may include a vacuum chamber assembly 200 and a cold screen assembly 300 located on the outer periphery of the vacuum chamber assembly 200. The cold screen assembly 300 can dissipate heat from the vacuum chamber assembly 200, ensuring the normal operation of the vacuum chamber assembly 200. The inner wall of the cold screen assembly 300 near the vacuum chamber assembly 200 and the outer wall of the vacuum chamber assembly 200 near the cold screen assembly 300 may be spaced apart to form a gap 400. The vacuum chamber assembly 200 may include a plurality of vacuum chamber units 210, which may be connected in a ring. Adjacent vacuum chamber units 210 may be welded together, and a plurality of welds 230 may be formed on the outer wall of the vacuum chamber assembly 200.

[0043] The welding auxiliary device 100 may include a protective frame 10, which may include a base plate 13 and at least two first ribs 11. The at least two first ribs 11 may be arranged at intervals on the base plate 13, and a protective cavity 15 may be defined between the at least two first ribs 11 and the base plate 13. The protective frame 10 can be detachably installed into the gap 400. After the protective frame 10 is installed in place, the first ribs 11 can press against the vacuum chamber assembly 200, which can support the protective frame 10 and improve the reliability and stability of the installation of the protective frame 10. The protective cavity 15 can correspond to the position of the weld 230 on the vacuum chamber assembly 200, so that the first ribs 11 can reduce the gap between the protective frame 10 and the vacuum chamber assembly 200 by pressing against the vacuum chamber assembly 200, which can improve the sealing effect of the protective cavity 15.

[0044] Therefore, a smaller independent space can be formed within the gap 400 to cover and seal the outside of the weld 230, which can isolate the heat generated by welding and reduce the heat transferred from the weld 230 to the cold screen. This can prevent the cold screen from deforming and being damaged due to local overheating when the coolant is not flowing. At the same time, it can prevent impurities such as welding fumes, dust or water vapor from meeting and adhering to the outer wall of the vacuum chamber assembly 200 and the inner wall of the cold screen assembly 300 within the gap 400. This can ensure the heat conduction efficiency of the cold screen when the coolant is flowing. Furthermore, the protective frame 10 can be removed from the gap 400 to clean impurities and reuse the device, which is convenient for cleaning. This can ensure the working efficiency and service life of each component of the fusion device 1000 (such as the cold screen assembly 300).

[0045] The protective frame 10 may be provided with a ventilation port 16, which can be connected to the protective cavity 15. This allows the protective cavity 15 to be vented with inert gas (such as high-purity argon) through the ventilation port 16, replacing the internal air. This ensures that the inert gas is evenly distributed within the protective cavity 15 and makes more thorough contact with the weld 230, thus protecting the weld 230, preventing it from coming into contact with air during the welding process, reducing welding difficulty, improving the quality of the weld 230, and ensuring the working efficiency and service life of all components of the fusion device 1000 (such as the vacuum chamber assembly 200).

[0046] According to an embodiment of the present invention, the welding auxiliary device 100 for a fusion device 1000, by providing a detachable protective frame 10 installed in the gap 400, and the protective frame 10 having a protective cavity 15 corresponding to the position of the weld 230, can form a smaller independent space in the gap 400 to cover and seal the outside of the weld 230. This can isolate the heat generated by welding, prevent the cold screen from deforming and being damaged due to local overheating when the coolant is not flowing, and isolate impurities such as welding fumes, dust or water vapor, preventing impurities from adhering to the gap 400 and affecting the working effect of the fusion device 1000. At the same time, it can make the inert gas uniformly fill the protective cavity 15, which can protect the weld 230, thereby reducing the welding difficulty, improving the quality of the weld 230, and ensuring the working efficiency and service life of each component of the fusion device 1000.

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 14 As shown, according to some embodiments of the present invention, the protective frame 10 may further include at least one second rib 12, at least one second rib 12 may be arranged on the base plate 13, and at least one second rib 12 may be located between two adjacent first ribs 11. The vacuum chamber assembly 200 may have a splicing plate 220, and two adjacent vacuum chamber units 210 may be welded together by the splicing plate 220, such that the two sides of the splicing plate 220 may each have a weld seam 230, that is, there may be a weld seam 230 between the splicing plate 220 and a vacuum chamber unit 210, and there may be a weld seam 230 between the splicing plate 220 and another vacuum chamber unit 210. The second rib 12 may abut against the splicing plate 220.

[0048] Therefore, the second rib 12 and the first rib 11 can cooperate to jointly support the protective frame 10, which can improve the support effect of the protective frame 10, improve the reliability and stability of the installation of the protective frame 10, and at the same time make the relative position of the vacuum chamber unit 210 and the splicing plate 220 more stable, which can improve the reliability and stability of welding, thereby reducing the welding difficulty, improving the quality of the weld 230, and ensuring the working efficiency and service life of each component of the fusion device 1000.

[0049] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 14 As shown, according to some embodiments of the present invention, the welding auxiliary device 100 may further include at least one first inflation member 20. The first inflation member 20 may be disposed on the side of the base plate 13 opposite to the first rib plate 11, and the first inflation member 20 and the base plate 13 are detachably connected for easy assembly and disassembly. The first inflation member 20 may have a first inflation port 21, so that the first inflation member 20 can be inflated or deflated. After the first inflation member 20 is deflated, the protective frame 10 can more easily enter and exit the gap 400. That is, the protective frame 10 can enter and exit the gap 400 through the gap between two adjacent vacuum chamber units 210 when the splicing plate 220 is not installed, which facilitates assembly and disassembly.

[0050] After the protective frame 10 is installed in place, the first inflation component 20 can be inflated to press against the cold screen assembly 300 and react against the protective frame 10. This allows the protective frame 10 to press against the vacuum chamber assembly 200, which can improve the fixing effect of the protective frame 10, improve the reliability and stability of the installation of the protective frame 10, improve the sealing effect of the protective cavity 15, and improve the sealing effect on the outside of the weld 230. This can improve the protection effect of the weld 230, reduce the welding difficulty, improve the quality of the weld 230, and ensure the working efficiency and service life of all components of the fusion device 1000.

[0051] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 14 As shown, in some embodiments, the welding auxiliary device 100 may further include two second inflation components 30. The two second inflation components 30 may be respectively disposed on opposite sides of the two first ribs 11, and the two second inflation components 30 may be detachably connected to the first ribs 11 for easy assembly and disassembly. The second inflation component 30 may have a second inflation port 31, so that the second inflation component 30 can be inflated or deflated. After the second inflation component 30 is deflated, the protective frame 10 can more easily enter and exit the gap 400. That is, the protective frame 10 can enter and exit the gap 400 through the gap between two adjacent vacuum chamber units 210 when the splicing plate 220 is not installed, which facilitates assembly and disassembly.

[0052] After the protective frame 10 is installed in place, the second inflation component 30 can be inflated to press against the vacuum chamber assembly 200, which can seal or fill the gap between the protective frame 10 and the vacuum chamber assembly 200, improve the sealing effect of the protective cavity 15, improve the sealing effect on the outside of the weld 230, and increase the force between the welding auxiliary device 100, the cold shield assembly 300 and the vacuum chamber assembly 200, which can improve the fixing effect of the protective frame 10, and improve the reliability and stability of the installation of the protective frame 10. This can improve the protection effect of the weld 230, reduce the welding difficulty, improve the quality of the weld 230, and ensure the working efficiency and service life of each component of the fusion device 1000.

[0053] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the first inflatable component 20 can be bonded to the base plate 13 for easy disassembly and assembly; or, the second inflatable component 30 can be bonded to the first rib plate 11 for easy disassembly and assembly; or, the first inflatable component 20 can be bonded to the base plate 13 and the second inflatable component 30 can be bonded to the first rib plate 11 for easy disassembly and assembly, thereby facilitating maintenance and storage.

[0054] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the first inflatable component 20 may have a first positioning part, and the base plate 13 may have a first mating part 131. The first positioning part and the first mating part 131 cooperate to achieve pre-positioning of the first inflatable component 20 for easy operation; or, the second inflatable component 30 may have a second positioning part, and the first rib plate 11 may have a second mating part. The second positioning part and the second mating part cooperate to achieve pre-positioning of the second inflatable component 30 for easy operation.

[0055] Alternatively, the first inflatable component 20 may have a first positioning part, the base plate 13 may have a first mating part 131, and the first positioning part and the first mating part 131 may mate with each other. The second inflatable component 30 may have a second positioning part, the first rib plate 11 may have a second mating part, and the second positioning part and the second mating part may mate with each other. This can achieve pre-positioning of the first inflatable component 20 and the second inflatable component 30 for easy operation.

[0056] The first positioning part can be a first positioning rod (such as a screw), and the first mating part 131 can be a first positioning hole (such as a screw hole). Alternatively, the first positioning part can be a first positioning hole, and the first mating part 131 can be a first positioning rod. The first positioning rod and the first positioning hole can be inserted into each other to achieve pre-positioning of the first inflatable component 20 for easy operation. The second positioning part can be a second positioning rod (such as a screw), and the second mating part can be a second positioning hole (such as a screw hole). Alternatively, the second positioning part can be a second positioning hole, and the second mating part can be a second positioning rod. The second positioning rod and the second positioning hole can be inserted into each other to achieve pre-positioning of the second inflatable component 30 for easy operation.

[0057] In some embodiments, the first inflation component 20 can be at least one of flexible materials such as halogen-free PA66 material, polyimide material or low-chlorine gas phase adhesive material, which can prevent the material of the first inflation component 20 from reacting with the material of the cold screen assembly 300 (such as stainless steel), reduce damage to the cold screen assembly 300, and reduce the impact of the disassembly and assembly of the welding auxiliary device 100 on the fusion device 1000, making it easier to operate.

[0058] In some embodiments, the second inflation component 30 can be at least one of flexible materials such as halogen-free PA66 material, polyimide material or low-chlorine gas phase adhesive material, which can prevent the material of the first inflation component 20 from reacting with the material of the cold screen assembly 300 (such as stainless steel), reduce damage to the cold screen assembly 300, and reduce the impact of the disassembly and assembly of the welding auxiliary device 100 on the fusion device 1000, making it easier to operate.

[0059] In some embodiments, the protective frame 10 can be at least one of high-temperature resistant materials such as ceramic fiber combined with adhesive material or polytetrafluoroethylene material, so that the protective frame 10 can have a certain degree of hardness, which can play a shaping role for the first gas-filling component 20 and the second gas-filling component 30, and facilitate the bonding of the first gas-filling component 20 and the second gas-filling component 30 to the protective frame 10. At the same time, it can form a more independent small space within the gap 400 to separately cover the outside of the weld 230, which can improve the isolation effect of welding heat and the isolation effect of welding impurities, and prevent the cold screen assembly 300 from being damaged by the welding of the vacuum chamber assembly 200. This can improve the protection effect of the weld 230, ensure the working efficiency and service life of each component of the fusion device 1000, and facilitate cleaning and maintenance.

[0060] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, according to some embodiments of the present invention, the welding auxiliary device 100 may further include a camera device 40 (such as a webcam). The camera device 40 may be mounted on the protective frame 10 to observe the weld pool and the degree of weld formation 230. It can monitor and visually inspect the weld 230 and the welding process, reduce welding difficulty, and improve the quality of the weld 230. The camera device 40 may be directly mounted on the protective frame 10, or the camera device 40 may be connected to the first inflatable component 20. The protective frame 10 may be provided with mounting holes, and the camera device 40 may be fixed on the protective frame 10 through the mounting holes. It is understood that the protective frame 10 has a built-in wire harness, and the camera device 40 is automatically connected to the wire harness after being installed in place for the transmission of electrical signals.

[0061] According to some embodiments of the present invention, the welding auxiliary device 100 may further include a temperature sensor, which may be disposed on the protective frame 10 for detecting the temperature of the weld 230 and the gas temperature in the protective cavity 15. This enables monitoring of the weld 230 and the welding process, reduces welding difficulty, and improves the quality of the weld 230. The temperature sensor may be built into the protective frame 10, or it may be connected to the first gas filling component 20. The protective frame 10 may be provided with mounting holes, through which the temperature sensor may be fixed to the protective frame 10. It is understood that the protective frame 10 contains a wire harness, and the temperature sensor automatically connects to the wire harness after installation for the transmission of electrical signals.

[0062] According to some embodiments of the present invention, the welding auxiliary device 100 may further include a pressure sensor, which may be disposed on the protective frame 10 for detecting the gas pressure in the protective cavity 15, thereby enabling monitoring of the weld 230 and the welding process, reducing welding difficulty, and improving the quality of the weld 230. The pressure sensor may be built into the protective frame 10, or the pressure sensor may be connected to the first inflation component 20. The protective frame 10 may be provided with mounting holes, through which the pressure sensor may be fixed to the protective frame 10. It is understood that the protective frame 10 contains a wiring harness, and the pressure sensor is automatically connected to the wiring harness after being installed in place for the transmission of electrical signals.

[0063] According to some embodiments of the present invention, the protective frame 10 may also be fixed with a penetrant testing (PT) device, which can detect surface defects of the weld 230; the protective frame 10 may also be fixed with an ultrasonic testing (UT) device or a radiographic testing (RT) device, which can detect internal defects of the weld 230; and the protective frame 10 may also be fixed with a helium mass spectrometry leak detection device, which can perform overall leak detection on the welded protective cavity 15 and the vacuum chamber, thereby reducing the welding difficulty and improving the quality of the weld 230.

[0064] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 14 As shown, according to some embodiments of the present invention, the end of the protective frame 10 may have an abutment portion 132. The protective frame 10 can abut against the inner wall surface of the cold screen assembly 300 within the gap 400 through the abutment portion 132. Alternatively, the protective frame 10 can abut against the outer wall surface of the vacuum chamber assembly 200 within the gap 400 through the abutment portion 132. Or, the protective frame 10 can abut against the inner wall surface of the cold screen assembly 300 and the outer wall surface of the vacuum chamber assembly 200 respectively within the gap 400 through the abutment portion 132. That is, the end of the base plate 13 extends a section along the extension direction inclined to its body to press against other components. This can achieve temporary fixation of the end of the protective frame 10, temporary fixation of the welding auxiliary device 100 as a whole within the gap 400, and facilitate fine adjustment of the position of the welding auxiliary device 100 within the gap 400, making it easy to assemble and disassemble.

[0065] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 14 As shown, according to some embodiments of the present invention, the protective frame 10 may include multiple protective frames 14 that are rotatably connected along the length of the protective frame 10. The length of each protective frame 14 may be less than the length of the sector side (the length of the longest side of the sector) at the minimum bending radius of the cold screen assembly 300. This allows for a segmented design of the protective frame 10, enabling the multiple protective frames 14 of the protective frame 10 to rotate relative to each other when moving within the gap 400, thus facilitating easier movement of the protective frame 10 in and out of the gap 400 and making it easier to operate.

[0066] Figures 9-14The diagram shows the structure of a fusion device 1000 from various perspectives. The fusion device 1000 includes a vacuum chamber assembly 200 and a cold screen assembly 300. The vacuum chamber assembly 200 can be formed by connecting multiple vacuum chamber units 210 sequentially along a ring. Two adjacent vacuum chamber units 210 are welded together by splicing plates 220, so that the weld seam 230 of the vacuum chamber assembly 200 is formed on the opposite sides of each splicing plate 220. The cold screen assembly 300 needs to be pre-installed on the outside of the vacuum chamber assembly 200 after the multiple vacuum chamber units 210 of the vacuum chamber assembly 200 are positioned and before welding. There is a small gap 400 between the cold screen assembly 300 and the vacuum chamber assembly 200.

[0067] Figures 1-8 The following are structural and installation schematic diagrams of the welding auxiliary device 100 of this application from various perspectives. In this application, firstly, the operator needs to use a laser scanner to accurately map the target area of ​​the gap 400 (the area opposite to the position of the weld 230), identify all obstacles (such as supports, pipes and weld 230, etc.), and establish a digital model.

[0068] Secondly, the operator needs to process the digital model and design a customized curved protective frame 10. Since the protective frame 10 has a first rib 11 and a second rib 12, the cross section of the protective frame 10 is M-shaped. The operator needs to divide the entire protective frame 10 to form a multi-segment protective frame 14 that can be hinged sequentially, and ensure that the length of each segment of the protective frame 14 is less than the long side of the fan-shaped section at the minimum bending radius of the cold screen assembly 300. This ensures that the welding auxiliary device 100 can be smoothly pulled out after the vacuum chamber assembly 200 is welded together. At the same time, the protective frame 10 needs to reserve positioning holes (such as the first positioning hole and the second positioning hole) and mounting holes.

[0069] Finally, the protective frame 10 is manufactured by 3D printing, and the first inflatable component 20, the second inflatable component 30, and various detection devices (such as cameras, temperature sensors, and pressure sensors) are fixed to the protective frame 10. It is understood that the first inflatable component 20 and the second inflatable component 30 can be designed as segmented, expandable pleated structures to facilitate the entry and exit of the welding auxiliary device 100 into the gap 400, and the first inflatable component 20 can integrate the transmission lines of the camera and sensors.

[0070] The operator needs to divide the various inflatable components into sections based on the precise measurement results of the vacuum chamber assembly 200 and the cold shield assembly 300, and sort and mark the protective frame 10. Then, the protective frame 10 is installed section by section onto the first inflatable component 20 with bolts. The camera and sensor transmission line connectors integrated on the first inflatable component 20 are inserted into the corresponding mounting holes of the protective frame 10. After that, the camera, pressure sensor or temperature sensor and other components are connected to the line connectors and fixed to the protective frame 10. Finally, the second inflatable component 30 is installed on both sides of the protective frame 10 to realize the assembly of the welding auxiliary device 100.

[0071] It should be noted that before welding, the operator needs to thoroughly clean the area to be welded on the wall panel of the vacuum chamber assembly 200 (e.g., with acetone, anhydrous ethanol, etc.) and grind the area to be welded to ensure the quality of the weld bevel. Positioning marks also need to be made on the vacuum chamber assembly 200. Then, the operator needs to roll or fold the inflatable component (airbag) and send it into the annular gap 400 through the gap between two adjacent vacuum chamber units 210 where the splicing plate 220 is not installed. After that, after the protective frame 10 has basically reached the preset position, the operator can adjust the relative position of the two ends of the protective frame 10 with the vacuum chamber assembly 200 and temporarily fix it so that the abutting part 132 of the protective frame 10 (the bottom plate 13, the first rib 11 and the second rib 12 at the end of the protective frame 10) can fit against the outer wall of the vacuum chamber assembly 200.

[0072] Next, the operator needs to slowly inflate the airbag (first inflator 20 and second inflator 30) with dry air or nitrogen through the external control system, so that it unfolds in the predetermined position, so that the first inflator 20 is tightly attached to the inner wall of the cold shield assembly 300 and the back of the protective frame 10, and the second inflator 30 is tightly attached to the inner wall of the cold shield assembly 300, the outer wall of the vacuum chamber assembly 200 and the side wall of the protective frame 10. The airbag needs to maintain a stable low pressure (such as 0.1~0.3 bar) to provide sufficient support without putting too much pressure on the cold shield assembly 300.

[0073] Then, the operator needs to install and temporarily fix the splicing plate 220 at the welding bevel between the two adjacent vacuum chamber units 210. The splicing plate 220 can fit with the middle rib of the protective frame 10 (such as the second rib 12). Finally, high-purity argon gas is continuously introduced into the protective cavity 15 to completely replace the air so that the welding process can be carried out in this argon gas environment. The protective cavity 15 can physically isolate the welding area from the gap 400 (such as the entire large space between the vacuum chamber assembly 200 and the cold screen assembly 300) to prevent the spread and pollution of welding fumes. The welding can be carried out using automated pulse TIG welding and using a welding robot or an all-position automatic welding machine to move along a pre-programmed trajectory.

[0074] After confirming that the welding is qualified, the operator needs to slowly release the pressure of the airbag and remove the temporary fixation between the two ends of the protective frame 10 and the vacuum chamber assembly 200. Then, the welding auxiliary device 100 is pulled out from the gap 400. Finally, the operator needs to perform a final cleaning of the welding area and remove all temporary accessories. It is understood that the airbag can circulate low-temperature air or nitrogen, which can actively cool the weld 230 area and greatly reduce the thermal impact of welding heat input on the cold shield assembly 300 and the vacuum chamber assembly 200.

[0075] Other configurations and operations of the welding auxiliary device 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here. In the description of the present invention, "first feature" and "second feature" may include one or more of the features. The up-down direction, left-right direction, and front-back direction are defined according to the up-down direction, left-right direction, and front-back direction shown in the figures.

[0076] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0077] 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 the invention. 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.

[0078] Although embodiments of the invention 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 the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A welding auxiliary device for a fusion device, the fusion device comprising a vacuum chamber assembly and a cold shield assembly located on its outer periphery, characterized in that, include: A protective frame includes a base plate and at least two first ribs, the at least two first ribs being spaced apart on the base plate and defining a protective cavity between them, the protective frame being provided with a vent, the vent communicating with the protective cavity, the protective cavity being adapted to allow inert gas to be introduced through the vent; The protective frame is adapted to be detachably installed in the gap between the vacuum chamber assembly and the cold shield assembly, the first rib can press against the vacuum chamber assembly, and the protective cavity corresponds to the weld position on the vacuum chamber assembly.

2. The welding auxiliary device for a fusion device according to claim 1, characterized in that, The protective frame further includes at least one second rib, which is arranged on the base plate and located between two adjacent first ribs. The vacuum chamber assembly has a splice plate with welds on both sides. The second rib can press against the splice plate.

3. The welding auxiliary device for a fusion device according to claim 1, characterized in that, Also includes: At least one first inflatable element is provided on the side of the base plate opposite to the first rib, and the first inflatable element and the base plate are detachably connected. The first inflatable component has a first inflation port.

4. The welding auxiliary device for a fusion device according to claim 3, characterized in that, Also includes: Two second inflatable components are respectively disposed on opposite sides of the two first ribs, and the two second inflatable components are detachably connected to the first ribs respectively. The second inflatable component has a second inflation port.

5. The welding auxiliary device for a fusion device according to claim 4, characterized in that, The first inflatable component and the base plate are bonded together; and / or, The second inflatable component is bonded to the first rib.

6. The welding auxiliary device for a fusion device according to claim 4, characterized in that, The first inflatable component has a first positioning part, and the base plate has a first mating part, wherein the first positioning part and the first mating part mate; and / or, The second inflatable component has a second positioning part, and the first rib has a second mating part, the second positioning part and the second mating part are mated together.

7. The welding auxiliary device for a fusion device according to claim 4, characterized in that, The first inflation component is at least one of halogen-free PA66 material, polyimide material, or low-chlorine vapor phase adhesive material; and / or, The second inflation component is at least one of halogen-free PA66 material, polyimide material, or low-chlorine vapor phase adhesive material; and / or, The protective frame is at least one of ceramic fiber with adhesive material or polytetrafluoroethylene material.

8. The welding auxiliary device for a fusion device according to claim 1, characterized in that, It also includes: a camera device disposed on the protective frame for observing the weld pool and the degree of weld formation; and / or, It also includes: a temperature sensor disposed on the protective frame for detecting the weld temperature and the gas temperature within the protective cavity; and / or, It also includes a pressure sensor, which is disposed on the protective frame and is used to detect the gas pressure inside the protective cavity.

9. The welding auxiliary device for a fusion device according to claim 1, characterized in that, The protective frame has an abutment portion at its end, and the protective frame is adapted to abut against the inner wall surface of the cold shield assembly and / or the outer wall surface of the vacuum chamber assembly within the gap via the abutment portion.

10. The welding auxiliary device for a fusion device according to claim 1, characterized in that, The protective frame includes multiple protective frames that are rotatably connected along the length of the protective frame. The length of each protective frame is less than the length of the fan-shaped side at the minimum bending radius of the cold screen assembly, so that the protective frame can enter and exit the gap.

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