Connection device and welding method for a connection device

Abstract

This invention relates to the field of nuclear fusion and discloses a connecting device and a welding method for the connecting device. The connecting device includes: a first corrugated pipe, a second corrugated pipe, a first adapter, a second adapter, and a third adapter. The first and second corrugated pipes are arranged coaxially. The first adapter is connected to one end of the first corrugated pipe in the axial direction and has a neck connection portion. The two ends of the second adapter are respectively connected to the first and second corrugated pipes and have a Dewar ring connection portion. The third adapter is connected to the other end of the second corrugated pipe away from the first corrugated pipe and has a biological shielding wall connection portion. The connecting device of this invention can compensate for the axial and radial displacement between the nuclear fusion device and the biological shielding wall caused by thermal expansion during operation, can attenuate vibration energy, avoid failure due to stress concentration at the neck connection portion of the biological shielding wall, and improve the reliability of the nuclear fusion device.

Description

Technical Field

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

[0002] In nuclear fusion devices, the neck tube of the vacuum chamber of a tokamak fusion device needs to be connected to the biological shielding wall via a connecting structure. However, the tokamak fusion device generates a large load during operation, which can easily cause axial and radial displacement between the neck tube and the biological shielding wall, generating vibration energy. Consequently, the connection between the neck tube and the biological shielding wall is prone to failure due to stress concentration, affecting the reliability of the fusion device. Therefore, how to solve the connection failure caused by axial and radial displacement between the neck tube and the biological shielding wall has become one of the urgent problems to be solved. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a connecting device that can compensate for the axial and radial displacement between the neck tube and the biological shielding wall caused by thermal expansion during the operation of a nuclear fusion device, can attenuate vibration energy, avoid failure at the connection between the neck tube and the biological shielding wall due to stress concentration, and improve the reliability of the nuclear fusion device.

[0004] The present invention also aims to provide a welding method for a connecting device, in which the above-described connecting device is applied.

[0005] According to an embodiment of the present invention, a connecting device is used to connect the neck tube and the biological shielding wall of a nuclear fusion device. The connecting device includes: a first corrugated pipe and a second corrugated pipe, the first corrugated pipe and the second corrugated pipe being arranged coaxially; a first adapter, the first adapter being connected to one end of the first corrugated pipe in the axial direction, and the first adapter having a neck tube connecting portion; a second adapter, the two ends of the second adapter being respectively connected to the first corrugated pipe and the second corrugated pipe, and the second adapter having a Dewar ring connecting portion; and a third adapter, the third adapter being connected to the other end of the second corrugated pipe away from the first corrugated pipe, and the third adapter having a biological shielding wall connecting portion.

[0006] According to the connecting device of the present invention, a first corrugated pipe is connected to the neck tube via a first adapter, a second corrugated pipe is connected to the biological shielding wall via a third adapter, and the first and second corrugated pipes are connected via a second adapter, which is also connected to the Dewar ring. This effectively compensates for the axial and radial displacement between the neck tube and the biological shielding wall caused by thermal expansion during the operation of the nuclear fusion device, attenuates vibration energy, prevents failure at the connection between the neck tube and the biological shielding wall due to stress concentration, and improves the reliability of the nuclear fusion device. The connection between the second adapter and the Dewar ring provides support in the middle of the connecting device, improving the overall structural strength of the device and enabling it to withstand larger loads. This enhances the compensation capability of the connecting device between the neck tube and the biological shielding wall, further improving the reliability of the nuclear fusion device.

[0007] In some embodiments of the present invention, the first adapter is an annular plate perpendicular to the wall of the first corrugated pipe, the side of the first adapter is welded to the periphery of the first corrugated pipe, the first adapter has a first inner annular surface, the first inner annular surface forms the neck connection portion and is welded to the neck.

[0008] In some embodiments of the present invention, the second adapter is an annular plate perpendicular to the wall of the first corrugated pipe and the wall of the second corrugated pipe, and one end of the second adapter is welded to the first corrugated pipe and the other end is welded to the second corrugated pipe.

[0009] In some embodiments of the present invention, the second adapter has a second outer annular surface, which forms the Dewar ring connection portion.

[0010] In some embodiments of the present invention, the third adapter is an annular plate perpendicular to the wall of the second corrugated pipe, the side of the third adapter is connected to the second corrugated pipe, the third adapter has a third outer annular surface, and the third outer annular surface forms the biological shield wall connection part.

[0011] In some embodiments of the present invention, in the axial direction of the first bellows, the length of the first bellows is greater than the length of the second bellows, and the number of bellows in the first bellows is greater than the number of bellows in the second bellows.

[0012] A welding method for a connecting device according to an embodiment of the present invention is used to manufacture the connecting device described in any of the preceding claims. The method includes: installing an anti-deformation fixture at a position on the first corrugated pipe near the welding area of ​​the second adapter; welding the first corrugated pipe to the first adapter on the inner side of the first corrugated pipe; installing anti-deformation fixtures at both ends of the second corrugated pipe near the welding area; welding both ends of the second adapter to the first corrugated pipe and the second corrugated pipe respectively; welding the Dewar ring connecting portion of the second adapter to the Dewar ring; and welding the third adapter to the second corrugated pipe.

[0013] According to the welding method of the connecting device of the present invention, by sequentially assembling and welding the first adapter, the first corrugated pipe, the second adapter, the second corrugated pipe, and the third adapter, the connecting device can be welded in two parts, which facilitates the operation of the welder, reduces the difficulty of the welding operation, and improves the welding efficiency. Installing anti-deformation fixtures inside the first and second corrugated pipes before welding the corresponding components can effectively suppress the welding deformation of the first and second corrugated pipes, which helps to reduce welding stress, improve welding quality, and thus improve the structural strength and reliability of the connecting device.

[0014] In some embodiments of the present invention, the anti-deformation fixture is L-shaped and arranged at the four corners of the first corrugated pipe and the second corrugated pipe.

[0015] In some embodiments of the present invention, the step of welding the first corrugated pipe to the first adapter on the inner side of the first corrugated pipe includes: performing a root pass weld on the connection position of the first corrugated pipe and the first adapter by manual argon arc welding, including first performing root pass welds on the upper left corner, lower right corner, upper right corner and lower left corner of the first corrugated pipe and the first adapter, and then performing root pass welds on the upper straight edge, lower straight edge, left straight edge and right straight edge of the first corrugated pipe and the first adapter; and performing fill and cover pass welds on the connection position of the first corrugated pipe and the first adapter by hot wire argon arc welding using the same root pass welding sequence.

[0016] In some embodiments of the present invention, after the step of welding the first corrugated pipe to the first adapter on the inner side of the first corrugated pipe, the method further includes: measuring the position data of the first corrugated pipe after welding, and customizing the second adapter.

[0017] In some embodiments of the present invention, the step of welding the two ends of the second adapter to the first corrugated pipe and the second corrugated pipe respectively includes: performing root pass welding, fill welding and capping welding using the welding steps of the first adapter to the first corrugated pipe.

[0018] In some embodiments of the present invention, after the step of welding the two ends of the second adapter to the first corrugated pipe and the second corrugated pipe respectively, the method further includes: measuring the position data of the second corrugated pipe after welding, and customizing the third adapter.

[0019] In some embodiments of the present invention, the step of welding the third adapter to the second corrugated pipe includes: performing root pass welding, fill welding, and capping welding using the welding steps of the first adapter to the first corrugated pipe.

[0020] In some embodiments of the present invention, the weld between the first corrugated pipe and the first adapter, the weld between the second adapter, the weld between the second corrugated pipe and the second adapter, the weld between the third adapter, and the weld between the second adapter and the Dewar ring are all full-penetration T-shaped fillet welds.

[0021] 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

[0022] 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:

[0023] Figure 1 A cross-sectional view of a connecting device provided in some embodiments of the present invention;

[0024] Figure 2 A three-dimensional structural schematic diagram of the connection device, neck tube, and Dewar ring body provided in some embodiments of the present invention;

[0025] Figure 3 A three-dimensional structural diagram illustrating the connection device, neck tube, Dewar ring, and biological shielding wall provided in some embodiments of the present invention;

[0026] Figure 4 This is a flowchart of a welding method for a connecting device according to some embodiments of the present invention. Figure 1 ;

[0027] Figure 5 A schematic diagram of the structure of the first and second corrugated pipes with anti-deformation fixtures installed inside, according to some embodiments of the present invention;

[0028] Figure 6 This is a flowchart of a welding method for a connecting device according to some embodiments of the present invention. Figure 2 ;

[0029] Figure 7This is a schematic diagram of the bevel of the T-shaped fillet weld between the first bellows and the first adapter, provided for some embodiments of the present invention.

[0030] Figure label:

[0031] 100. Connecting device;

[0032] 10. First bellows; 10a. Outer pipe surface; 11. Corrugations;

[0033] 20. Second corrugated pipe;

[0034] 30. First adapter; 30a. First inner annular surface; 30b. First outer annular surface;

[0035] 40. Second adapter; 40a. Second outer ring surface;

[0036] 50. Third adapter; 50a. Third outer ring surface;

[0037] 60. Anti-deformation tooling;

[0038] 1001, First weld; 1002, Second weld; 1003, Third weld; 1004, Fourth weld; 1005, Fifth weld; 1006, Bevel;

[0039] 200, Cervical tube; 300, Dewar ring; 400, Biological shielding wall. Detailed Implementation

[0040] 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.

[0041] 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" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, features specified as "first" or "second" may explicitly or implicitly include one or more of the same feature, used to distinguish and describe features, without any order or distinction of importance.

[0043] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0044] 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.

[0045] The following is for reference. Figures 1 to 3 The present invention describes a connecting device 100, which is used to connect the neck tube 200 of the vacuum chamber of a nuclear fusion device and the outer biological shielding wall 400.

[0046] like Figures 1 to 3 As shown, the connecting device 100 of this embodiment includes: a first corrugated pipe 10, a second corrugated pipe 20, a first adapter 30, a second adapter 40, and a third adapter 50. The first corrugated pipe 10 and the second corrugated pipe 20 are arranged coaxially. The first adapter 30 is connected to one end of the first corrugated pipe 10 in the axial direction and has a neck tube connection portion. The two ends of the second adapter 40 are respectively connected to the first corrugated pipe 10 and the second corrugated pipe 20 and have a Dewar ring connection portion. The third adapter 50 is connected to the other end of the second corrugated pipe 20 away from the first corrugated pipe 10 and has a biological shielding wall connection portion.

[0047] The first corrugated pipe 10 and the second corrugated pipe 20 can refer to tubular structures with transverse corrugations. The materials can be, but are not limited to, alloy steel, stainless steel, aluminum alloy, and composite materials, for example, 304 stainless steel. The first corrugated pipe 10 and the second corrugated pipe 20 are provided with multiple corrugations 11, the shape of which can be annular. The number of corrugations 11 in the first corrugated pipe 10 and the second corrugated pipe 20 can be, but is not limited to, two, three, four, five, six, seven, etc. For example, refer to... Figure 1 The first bellows 10 has six corrugations 11, and the second bellows 20 has four corrugations 11. The first adapter 30 can refer to a component that connects to the neck tube 200, and is connected to the neck tube 200 through the neck tube connecting part, and the connection method can be welding.

[0048] The second adapter 40 can refer to a component that connects the first bellows 10, the second bellows 20, and the Dewar ring 300. It is connected to the Dewar ring 300 through the Dewar ring connecting part, and the connection method can be welding.

[0049] The third adapter 50 can refer to a component that connects to the biological shielding wall 400. It is connected to the biological shielding wall 400 through the biological shielding wall connector, and the connection method can be welding.

[0050] For example, refer to Figure 1 The first corrugated pipe 10 and the second corrugated pipe 20 can be structures with annular corrugations 11 on a square tube. The first corrugated pipe 10 and the second corrugated pipe 20 are typically made of 304 stainless steel and are multi-layered, compound corrugated pipe structures. They employ annular corrugations 11 with rounded transitions between crests and troughs. The height of the corrugations 11 is 70-90mm, and the spacing between them is 30-40mm. A total of ten corrugations 11 are provided in the first corrugated pipe 10 and the second corrugated pipe 20, with six corrugations 11 in the first corrugated pipe 10 and four corrugations 11 in the second corrugated pipe 20. The inner wall dimensions of the first corrugated pipe 10 and the second corrugated pipe 20 are typically no more than 2300mm in length and no more than 3000mm in width. The length of a single rectangular weld is close to 10000mm, and the wall thickness of the first corrugated pipe 10 and the second corrugated pipe 20 is 20mm. The design of the first corrugated pipe 10 and the second corrugated pipe 20 uses a circular arc transition to disperse stress, thereby improving the axial expansion and contraction and radial compressive strength of the first corrugated pipe 10 and the second corrugated pipe 20. This can meet the displacement compensation requirements during the operation of the fusion device and avoid structural fracture.

[0051] According to the connecting device 100 of the present invention, the first corrugated pipe 10 is connected to the neck pipe 200 via the first adapter 30, the second corrugated pipe 20 is connected to the biological shielding wall 400 via the third adapter 50, the first corrugated pipe 10 and the second corrugated pipe 20 are connected via the second adapter 40, and the second adapter 40 is connected to the Dewar ring 300. This effectively compensates for the axial and radial displacements between the neck pipe 200 and the biological shielding wall 400 caused by thermal expansion during the operation of the nuclear fusion device, attenuates vibration energy, prevents failure at the connection point between the neck pipe 200 and the biological shielding wall due to stress concentration, and improves the reliability of the nuclear fusion device. The connection between the second adapter 40 and the Dewar ring 300 provides support in the middle of the connecting device 100, improving the overall structural strength of the connecting device 100 and enabling it to withstand larger loads. This enhances the compensation capability of the connecting device 100 between the neck pipe 200 and the biological shielding wall 400, further improving the reliability of the nuclear fusion device.

[0052] In some embodiments of the present invention, reference is made to Figure 1The first adapter 30 is an annular plate perpendicular to the wall of the first corrugated pipe 10. The side of the first adapter 30 is welded to the periphery of the first corrugated pipe 10. The first adapter 30 has a first inner annular surface 30a, which forms a neck connection portion and is welded to the neck pipe 200.

[0053] In the above technical solution, the first adapter 30 is an annular plate perpendicular to the wall of the first corrugated pipe 10, which can improve the connection strength between the first adapter 30 and the first corrugated pipe 10, and is beneficial to improving the structural strength of the connecting device 100. Moreover, the perpendicularity between the first adapter 30 and the first corrugated pipe 10 facilitates welding operations. The side of the first adapter 30 is welded to the periphery of the first corrugated pipe 10, which can improve the structural strength of the connection between the first adapter 30 and the first corrugated pipe 10, effectively disperse stress, and avoid welding failure caused by local stress concentration. The first inner annular surface 30a forms a neck connection part and is directly welded to the neck 200, so that the force of the neck 200 can be evenly transmitted to the first corrugated pipe 10 through the first adapter 30, thereby improving the structural reliability and load-bearing capacity of the connecting device 100.

[0054] In some embodiments of the present invention, reference is made to Figure 1 The first adapter 30 has a first outer annular surface 30b, which is coplanar with the outer tube surface 10a of the first corrugated pipe 10. In the above technical solution, the first outer annular surface 30b is coplanar with the outer tube surface 10a of the first corrugated pipe 10. This ensures that the first adapter 30 does not protrude from the outer tube surface 10a of the first corrugated pipe 10, thus avoiding obstruction or blockage of the installation of other components on the nuclear fusion device and improving the structural compactness of the connecting device 100.

[0055] In some embodiments of the present invention, reference is made to Figure 1 The second adapter 40 is an annular plate perpendicular to the walls of the first corrugated pipe 10 and the second corrugated pipe 20. One end of the second adapter 40 is welded to the first corrugated pipe 10, and the other end is welded to the second corrugated pipe 20. In the above technical solution, the second adapter 40 is an annular plate perpendicular to the walls of the first corrugated pipe 10 and the second corrugated pipe 20, which enables the second adapter 40 to form a stable vertical connection structure with the first corrugated pipe 10 and the second corrugated pipe 20, reducing the additional torque caused by angular deviation, ensuring the structural stability of the connecting device 100 under axial and radial forces, and improving the structural strength and reliability of the connecting device 100.

[0056] In some embodiments of the present invention, reference is made to Figure 1The second adapter 40 has a second outer annular surface 40a, which forms a Dewar ring connection portion. In the above technical solution, the second outer annular surface 40a forming the Dewar ring connection portion allows the second adapter 40 and the Dewar ring 300 to be circumferentially connected, improving the structural strength of the connection, effectively dispersing stress, avoiding welding failure caused by localized stress concentration, and ensuring the reliability of the connection. The second adapter 40 is directly welded to the Dewar ring 300 via the second outer annular surface 40a, which also facilitates welding operations, reduces operational difficulty, and improves welding efficiency.

[0057] In some embodiments of the present invention, reference is made to Figure 1 The third adapter 50 is an annular plate perpendicular to the wall of the second corrugated pipe 20. The side of the third adapter 50 is connected to the second corrugated pipe 20. The third adapter 50 has a third outer annular surface 50a, which forms a biological shield wall connection part.

[0058] In the above technical solution, the third adapter 50 is an annular plate perpendicular to the wall of the second corrugated pipe 20, which facilitates welding operations. The side of the third adapter 50 is connected to the second corrugated pipe 20, which can improve the structural strength of the connection between the third adapter 50 and the second corrugated pipe 20, effectively disperse stress, and avoid welding failure caused by local stress concentration. The third outer annular surface 50a forms the biological shielding wall connection part, increasing the connection area between the third adapter 50 and the biological shielding wall 400, so that the force of the biological shielding wall 400 can be evenly transmitted to the second corrugated pipe 20 through the third adapter 50, thereby improving the structural reliability and load-bearing capacity of the connecting device 100.

[0059] In some embodiments of the present invention, reference is made to Figure 1 In the axial direction of the first bellows 10, the length of the first bellows 10 is greater than the length of the second bellows 20, and the number of bellows 11 in the first bellows 10 is greater than the number of bellows 11 in the second bellows 20.

[0060] The axial direction of the first bellows 10 can be referenced. Figure 1 In the above technical solution, since the neck tube 200 region may generate relatively larger thermal expansion and vibration displacement during the operation of the nuclear fusion device, the first bellows 10 is made longer and the number of bellows 11 is increased, which can provide better axial expansion and contraction capacity and radial deformation margin, so as to better absorb the displacement changes in the neck tube 200 region and reduce the stress transmitted to subsequent connecting parts.

[0061] like Figure 4 As shown, the welding method for the connecting device 100 according to an embodiment of the present invention is used to manufacture the connecting device 100 of any of the preceding embodiments. The welding method for the connecting device 100 includes:

[0062] Step S1: Install anti-deformation fixture 60 at the welding area of ​​the first corrugated pipe 10 near the second adapter 40.

[0063] Step S2: Weld the first corrugated pipe 10 to the first adapter 30 on the inner side of the first corrugated pipe 10.

[0064] Step S3: Install anti-deformation fixtures 60 at both ends of the second corrugated pipe 20 near the welding area. The locations at both ends of the second corrugated pipe 20 near the welding area can refer to the positions of the second corrugated pipe 20 near the second adapter 40 and near the third adapter 50.

[0065] Step S4: Weld the two ends of the second adapter 40 to the first corrugated pipe 10 and the second corrugated pipe 20 respectively.

[0066] Step S5: Weld the Dewar ring connecting part of the second adapter 40 to the Dewar ring 300.

[0067] Step S6: Weld the third adapter 50 to the second bellows 20.

[0068] refer to Figure 1 The above welding method can weld the first corrugated pipe 10 to the first adapter 30 on the inside to form the first weld 1001, and then weld the first adapter 30 to the neck pipe 200. Since the first corrugated pipe 10 and the second corrugated pipe 20 are welded separately, the length of the first corrugated pipe 10 is shorter than that of the connecting device 100, which makes it convenient for operators to carry out welding operations inside the first corrugated pipe 10, thereby reducing the welding difficulty and improving the welding efficiency and welding quality. By setting anti-deformation fixtures 60 at positions where the first corrugated pipe 10 is close to the second adapter 40, the second corrugated pipe 20 is close to the second adapter 40, and the second corrugated pipe 20 is close to the third adapter 50, deformation of the first corrugated pipe 10 and the second corrugated pipe 20 during welding can be effectively suppressed. This reduces the error generated when the first corrugated pipe 10 and the second corrugated pipe 20 are welded together through the second adapter 40, reduces welding stress, improves the welding quality between the first corrugated pipe 10, the second corrugated pipe 20 and the second adapter 40, and also ensures the welding quality between the second corrugated pipe 20 and the third adapter 50, thereby improving the overall structural strength of the connecting device 100. Next, a second weld 1002 is formed at one end of the first corrugated pipe 10 and the second adapter 40, and a third weld 1003 is formed at the other end of the second adapter 40. Then, the second adapter 40 is welded to the Dewar ring 300 to form a fourth weld 1004. Finally, the third adapter 50 is welded to the second bellows 20 to form the fifth weld 1005.

[0069] According to the welding method of the connecting device 100 of the present invention, by sequentially assembling and welding the first adapter 30, the first corrugated pipe 10, the second adapter 40, the second corrugated pipe 20, and the third adapter 50, the connecting device 100 can be welded in two parts, which facilitates the operation of the welding personnel, reduces the difficulty of the welding operation, and improves the welding efficiency. Before welding the corresponding components, installing anti-deformation fixtures 60 inside the first corrugated pipe 10 and the second corrugated pipe 20 can effectively suppress the welding deformation of the first corrugated pipe 10 and the second corrugated pipe 20, which helps to reduce welding stress, improve welding quality, and thus improve the structural strength and reliability of the connecting device 100.

[0070] In some embodiments of the present invention, reference is made to Figure 5 The anti-deformation fixture 60 is L-shaped and is arranged at the four corners of the first corrugated pipe 10 and the second corrugated pipe 20.

[0071] In the above technical solution, the anti-deformation fixture 60 is L-shaped and arranged at the four corners of the first corrugated pipe 10 and the second corrugated pipe 20. It can control deformation from multiple positions, effectively controlling the deformation trend of the first corrugated pipe 10 and the second corrugated pipe 20 during welding. The L-shaped anti-deformation fixture 60 also has a smaller size, ensuring ample space within the channels of the first corrugated pipe 10 and the second corrugated pipe 20, thus providing sufficient operating space for the welder and facilitating welder operation.

[0072] In some embodiments of the present invention, reference is made to Figure 6 The step of welding the first corrugated pipe 10 to the first adapter 30 on the inner side of the first corrugated pipe 10 includes: performing a root pass weld on the connection position of the first corrugated pipe 10 and the first adapter 30 by manual argon arc welding, including first performing root pass welds on the upper left corner, lower right corner, upper right corner and lower left corner of the first corrugated pipe 10 and the first adapter 30, and then performing root pass welds on the upper straight edge, lower straight edge, left straight edge and right straight edge of the first corrugated pipe 10 and the first adapter 30; and performing fill and cover pass welds on the connection position of the first corrugated pipe 10 and the first adapter 30 by hot wire argon arc welding using the same root pass welding sequence.

[0073] The upper, lower, left, and right straight edges of the first corrugated pipe 10 and the first adapter 30 are welded using a skip welding and segmented back welding method. For example, after each straight edge is welded for 150-250mm, the next straight edge segment is welded. The weld temperature is controlled below 80℃.

[0074] Since the length of the first weld 1001 is typically close to 10,000 mm, its considerable length makes continuous welding prone to quality issues. In the aforementioned technical solution, by first performing root pass welding on the upper left, lower right, upper right, and lower left corners of the first corrugated pipe 10 and the first adapter 30, and then performing root pass welding on the upper, lower, left, and right straight edges of the first corrugated pipe 10 and the first adapter 30, time can be allowed for each welding position to cool down, fully releasing welding stress, avoiding stress concentration, and ensuring the structural strength of the connection. Using hot-wire argon arc welding to fill and cover the connection between the first corrugated pipe 10 and the first adapter 30 in a root pass welding sequence forms a solidified welding logic sequence, reducing stress concentration, ensuring stable welding quality, further strengthening the structural strength of the connection between the first corrugated pipe 10 and the first adapter 30, and ensuring the reliability of the connection. Hot-wire argon arc welding allows for mechanical filling and capping welding, which reduces welding heat input, controls deformation tendency, and improves welding efficiency.

[0075] In some embodiments of the present invention, after the step of welding the first corrugated pipe 10 to the first adapter 30 on the inner side of the first corrugated pipe 10, the method further includes: measuring the position data of the first corrugated pipe 10 after welding, and customizing the second adapter 40.

[0076] After the first corrugated pipe 10 and the first adapter 30 are welded, the first corrugated pipe 10 will still experience a small amount of deformation, which, although difficult to observe with the naked eye, will affect the fitting accuracy of the first corrugated pipe 10 and the second adapter 40. In the above technical solution, by measuring the position data of the first corrugated pipe 10 after welding, the precise outline parameters of the first corrugated pipe 10 after welding can be obtained. Based on the measurement results, the second adapter 40 can be customized on-site, which can effectively improve the assembly accuracy of the second adapter 40 and the first corrugated pipe 10 and the second corrugated pipe 20, reduce stress concentration and weld failure risk, and improve the reliability of the connection between the second adapter 40 and the first corrugated pipe 10 and the second corrugated pipe 20.

[0077] In some embodiments of the present invention, the step of welding the two ends of the second adapter 40 to the first corrugated pipe 10 and the second corrugated pipe 20 respectively includes: performing root pass welding, fill welding and cover welding using the welding steps of the first adapter 30 and the first corrugated pipe 10.

[0078] In the above technical solution, the welding steps of the first adapter 30 and the first corrugated pipe 10 for root pass welding, fill welding, and capping welding can form a solidified welding logic sequence, reduce stress concentration, ensure stable welding quality, strengthen the structural strength of the connection between the second adapter 40 and the first corrugated pipe 10 and the second corrugated pipe 20, and ensure the reliability of the connection between the second adapter 40 and the first corrugated pipe 10 and the second corrugated pipe 20. The hot-wire argon arc welding method allows the fill and capping welding to be performed mechanically, which can reduce welding heat input, control deformation tendency, and improve welding efficiency.

[0079] In some embodiments of the present invention, after welding the two ends of the second adapter 40 to the first corrugated pipe 10 and the second corrugated pipe 20 respectively, the method further includes: measuring the position data of the second corrugated pipe 20 after welding, and customizing the third adapter 50.

[0080] Referring to the previous analysis, after the second corrugated pipe 20 and the second adapter 40 are welded, the second corrugated pipe 20 will also experience a small amount of deformation, affecting the fitting accuracy between the second corrugated pipe 20 and the third adapter 50. In the above technical solution, by measuring the position data of the second corrugated pipe 20 after welding, the precise outer contour parameters of the welded second corrugated pipe 20 can be obtained. Based on the measurement results, the third adapter 50 can be customized on-site, which can effectively improve the assembly accuracy of the third adapter 50 and the second corrugated pipe 20, reduce stress concentration and weld failure risks, and improve the reliability of the connection between the third adapter 50 and the second corrugated pipe 20.

[0081] In some embodiments of the present invention, the step of welding the third adapter 50 to the second corrugated pipe 20 includes: performing root pass welding, fill welding and cover welding using the welding steps of the first adapter 30 and the first corrugated pipe 10.

[0082] In the above technical solution, the welding steps of the first adapter 30 and the first bellows 10 for root pass welding, fill welding, and capping welding can form a solidified welding logic sequence, reduce stress concentration, ensure stable welding quality, further strengthen the structural strength of the connection between the third adapter 50 and the second bellows 20, and ensure the reliability of the connection between the third adapter 50 and the second bellows 20. The hot-wire argon arc welding method allows the fill and capping welding to be performed mechanically, which can reduce welding heat input, control deformation tendency, and improve welding efficiency.

[0083] In some embodiments of the present invention, reference is made to Figure 7 The welds of the first corrugated pipe 10 and the first adapter 30, the welds of the second adapter 40, the welds of the second corrugated pipe 20 and the second adapter 40, the welds of the third adapter 50, and the welds of the second adapter 40 and the Dewar ring 300 are all T-shaped fillet welds with full penetration.

[0084] For example, refer to Figure 7 , Figure 7 This is a schematic diagram of the welding groove 1006 for the T-shaped fillet weld between the first corrugated pipe 10 and the first adapter 30. The included angle α of the groove 1006 can be 45 degrees to 55 degrees, the height H between the bottom of the groove 1006 and the inner wall of the first corrugated pipe 10 can be 1 mm to 1.2 mm, and the distance L between the side wall of the first corrugated pipe 10 and the first adapter 30 can be 2.5 mm to 3.5 mm.

[0085] In the above technical solution, each weld is a full-penetration T-type fillet weld, which can increase the weld strength, thereby increasing the structural strength of the connection between the components and further improving the reliability of the connection device 100.

[0086] The following is combined with Figure 1 and Figure 2 This describes a specific embodiment of the connecting device 100 of the present invention.

[0087] The connecting device 100 includes a first corrugated pipe 10, a second corrugated pipe 20, a first adapter 30, a second adapter 40, and a third adapter 50.

[0088] In the axial direction of the first bellows 10, the length of the first bellows 10 is greater than the length of the second bellows 20, and the first bellows 10 has six bellows 11, while the second bellows 20 has four bellows 11.

[0089] The first adapter 30 is an annular plate perpendicular to the wall of the first corrugated pipe 10. The side of the first adapter 30 is welded to the periphery of the first corrugated pipe 10. The first adapter 30 has a first inner annular surface 30a, which forms a neck connection portion and is welded to the neck pipe 200.

[0090] The second adapter 40 is an annular plate perpendicular to the wall of the first corrugated pipe 10 and the wall of the second corrugated pipe 20. One end of the second adapter 40 is welded to the first corrugated pipe 10 and the other end is welded to the second corrugated pipe 20. The second adapter 40 has a second outer annular surface 40a, which forms a Dewar ring body connection part. The Dewar ring body connection part is welded to the Dewar ring body 300.

[0091] The third adapter 50 is an annular plate perpendicular to the wall of the second corrugated pipe 20. The side of the third adapter 50 is connected to the second corrugated pipe 20. The third adapter 50 has a third outer annular surface 50a, which forms a biological shielding wall connection part. The biological shielding wall connection part is welded to the biological shielding wall 400.

[0092] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," 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.

[0093] 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 connecting device, characterized in that, The connecting device is used to connect the neck tube of the nuclear fusion device and the biological shielding wall, and the connecting device includes: The first corrugated pipe and the second corrugated pipe are arranged coaxially. A first adapter is connected to one end of the first corrugated pipe in the axial direction and has a neck connection portion. The first adapter is an annular plate perpendicular to the wall of the first corrugated pipe. The side of the first adapter is welded to the periphery of the first corrugated pipe. The first adapter has a first inner annular surface, which forms the neck connection portion and is welded to the neck. The second adapter has two ends connected to the first corrugated pipe and the second corrugated pipe respectively, and the second adapter has a Dewar ring body connecting part and a second outer ring surface, which forms the Dewar ring body connecting part. The third adapter is connected to the other end of the second corrugated pipe away from the first corrugated pipe, and the third adapter has a biological shielding wall connection part. The third adapter is an annular plate perpendicular to the pipe wall of the second corrugated pipe. The side of the third adapter is connected to the second corrugated pipe. The third adapter has a third outer annular surface, and the third outer annular surface forms the biological shielding wall connection part.

2. The connecting device according to claim 1, characterized in that, The second adapter is an annular plate perpendicular to the walls of the first and second corrugated pipes. One end of the second adapter is welded to the first corrugated pipe, and the other end is welded to the second corrugated pipe.

3. The connecting device according to claim 1, characterized in that, In the axial direction of the first bellows, the length of the first bellows is greater than the length of the second bellows, and the number of bellows in the first bellows is greater than the number of bellows in the second bellows.

4. A welding method for a connecting device, characterized in that, The method for manufacturing a connecting device as described in any one of claims 1 to 3 comprises: Install anti-deformation fixtures on the first bellows near the welding area of ​​the second adapter; The first bellows is welded to the first adapter on the inside of the first bellows. Anti-deformation fixtures are installed at both ends of the second corrugated pipe near the welding area; Weld the two ends of the second adapter to the first bellows and the second bellows, respectively; Weld the Dewar ring connecting part of the second adapter to the Dewar ring; The third adapter is welded to the second bellows.

5. The welding method for the connecting device according to claim 4, characterized in that, The anti-deformation fixture is L-shaped and is arranged at the four corners of the first corrugated pipe and the second corrugated pipe.

6. The welding method for the connecting device according to claim 4, characterized in that, The step of welding the first bellows to the first adapter on the inner side of the first bellows includes: The connection between the first corrugated pipe and the first adapter is welded by manual argon arc welding, including first welding the upper left corner, lower right corner, upper right corner and lower left corner of the first corrugated pipe and the first adapter, and then welding the upper straight edge, lower straight edge, left straight edge and right straight edge of the first corrugated pipe and the first adapter. The connection between the first corrugated pipe and the first adapter is filled and capped using a root pass welding sequence via hot wire argon arc welding.

7. The welding method for the connecting device according to claim 6, characterized in that, After the step of welding the first bellows to the first adapter on the inner side of the first bellows, the method further includes: Measure the position data of the first corrugated pipe after welding, and customize the second adapter.

8. The welding method for the connecting device according to claim 6 or 7, characterized in that, The step of welding the two ends of the second adapter to the first corrugated pipe and the second corrugated pipe respectively includes: performing root pass welding, fill welding and cover welding using the welding steps of the first adapter to the first corrugated pipe.

9. The welding method for the connecting device according to claim 8, characterized in that, After the step of welding both ends of the second adapter to the first bellows and the second bellows respectively, the method further includes: Measure the position data of the second corrugated pipe after welding, and customize the third adapter.

10. The welding method for the connecting device according to claim 9, characterized in that, The step of welding the third adapter to the second corrugated pipe includes: performing root pass welding, fill welding, and cover welding using the welding steps of the first adapter to the first corrugated pipe.

11. The welding method for the connecting device according to claim 6, characterized in that, The welds between the first corrugated pipe and the first adapter, the second adapter, the second corrugated pipe and the second adapter, the third adapter, and the second adapter and the Dewar ring are all full-penetration T-shaped fillet welds.

Images