An ultra-low temperature shell welding auxiliary device and a welding method

Abstract

The application discloses a kind of ultra-low temperature shell welding auxiliary devices, including main body fixed component, the main body fixed component connects shell main body, the main body fixed component is detachably connected with several connecting fixed components, the connecting fixed component connects shell flange, the shell flange connects shell main body.By connecting fixed component to shell flange is fixed, and by main body fixed component to shell main body is fixed, subsequently by the detachable connection between connecting fixed component and main body fixed component, so as to ensure the flexibility and stability of connection, and can be replaced according to actual use demand connecting fixed component, so as to ensure the flexibility of device use.

Description

Technical Field

[0001] This invention relates to the field of cryogenic equipment technology, and in particular to an auxiliary device and welding method for ultra-low temperature shell welding. Background Technology

[0002] With the rapid development of the semiconductor and medical industries, more and more cryogenic equipment is being applied in these sectors. The cryogenic housing is a core component, and its welding precision and quality play a crucial role in the normal operation of the equipment. The cryogenic housing is manufactured from ultra-thin stainless steel through welding and machining. The quality of the welding directly affects the cooling effect, processing dimensions, service life, and stability. For example, publication number "CN220636782U" discloses a "welding fixture for a branch flange of a semiconductor cryogenic pump," including a base plate, a vertical plate, and a sliding plate. The base plate has a circular countersunk hole for placing the straight section of the pump casing. The vertical plate is vertically connected to the base plate, and the sliding plate is height-adjustably connected to the vertical plate. The sliding plate is used to connect the branch flange. The positions of the vertical plate and the circular countersunk hole are configured so that the branch flange can be inserted vertically into the straight section of the pump casing. However, in practical applications, this type of device cannot be adapted to the welding and fixing of the housing flange and the cryogenic housing. Summary of the Invention

[0003] In view of the problem mentioned in the background art that the existing technology cannot adapt to the fixation of the shell flange during the welding process, the present invention provides an ultra-low temperature shell welding auxiliary device, which can fix the shell flange relative to the shell body during the welding process, thereby improving the accuracy of the welding process and improving the welding quality.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] An ultra-low temperature shell welding auxiliary device includes a main body fixing assembly connected to the shell body. Several connecting fixing components are detachably connected to the main body fixing assembly, and these connecting fixing components are connected to a shell flange, which in turn is connected to the shell body. The shell flange is fixed using the connecting fixing components, and the shell body is fixed using the main body fixing assembly. The detachable connection between the connecting fixing components and the main body fixing assembly ensures the flexibility and stability of the connection, and allows for the replacement of the connecting fixing components according to actual usage requirements, thus guaranteeing the flexibility of the device's use.

[0006] Preferably, the housing flange includes a connecting section and an outer plate. The outer plate is connected to a connecting and fixing assembly, the connecting section is connected to the housing body, and the connecting and fixing assembly is provided with a clamping unit for clamping the outer plate. By clamping the outer plate with the clamping unit, welding space can be provided between the connecting section and the housing body, while ensuring the fixing effect of the housing flange.

[0007] Preferably, the clamping unit includes a clamping block, which is rotatably connected to a locking bolt. The rotation of the locking bolt causes the clamping block to press against the outer plate. A locking bolt is provided on the connecting and fixing assembly, which moves the clamping block to clamp the outer plate onto the connecting and fixing assembly, ensuring the stability of the connection.

[0008] Preferably, the clamping block is provided with a connecting groove, the shape of which is adapted to the edge shape of the outer panel. This improves the compatibility with the outer panel and ensures the stability of the clamping.

[0009] Preferably, the main body fixing assembly includes a horizontal plate fixing member and a vertical plate fixing member, and the housing body includes a bottom plate unit connected to the horizontal plate fixing member and a vertical plate unit connected to the vertical plate fixing member, wherein the axial directions of the bottom plate unit and the vertical plate unit are intersected.

[0010] Preferably, the housing body is provided with a connecting cylinder, and the housing flange near the connecting cylinder has a connecting arc surface. The connecting and fixing assembly includes a rotating ring, which is connected to the housing flange and drives the housing flange to rotate around its axis. During the rotation of the rotating ring, the housing flange can be driven to rotate synchronously, thereby enabling the housing flange to rotate around its axis. This allows the connecting arc surface on the flange housing to be fitted against the connecting cylinder during installation, ensuring a complete fit between the connecting arc surface and the connecting cylinder.

[0011] Preferably, the rotating ring includes an active rotating ring and a follower rotating ring. The active rotating ring is rotatably connected to the connecting and fixing assembly, and the follower rotating ring is slidably connected to the connecting and fixing assembly and can rotate relative to the connecting and fixing assembly. A telescopic column is provided between the follower rotating ring and the active rotating ring, and an elastic element is sleeved on the telescopic column. The active rotating ring can drive the follower rotating ring to move synchronously via the connected telescopic column. The follower rotating ring drives the housing flange to move synchronously via the locking bolt and the clamping block. Since the housing flange has a connecting arc surface, the connecting arc surface will abut against the connecting cylinder at different positions during rotation, resulting in axial compressive force on the follower rotating ring. During this process, the follower rotating ring, telescopic column, locking bolt, clamping block, and housing flange move synchronously relative to the active rotating ring. As the active rotating ring rotates, the abutment position between the connecting arc surface and the connecting cylinder continuously changes until the connecting arc surface is completely in contact with the connecting cylinder. At this point, due to the compression effect of the elastic element on the housing flange, the housing flange remains in contact with the connecting cylinder. Because the arc surface is in contact and is subjected to the compression force of the elastic element, the housing flange is in a state of maximum rotational resistance, ensuring stable docking between the connecting arc surface and the connecting cylinder. In use, it can adaptively rotate by relying on the elastic compression effect of the elastic element. During rotation, the connecting arc surface will tend to be in a connection state of complete contact with the connecting cylinder due to the compression of the elastic element. When connecting the housing flange to the connecting fixing assembly, the follower rotating ring can be compressed, thereby creating a moving gap between the connecting arc surface and the connecting cylinder, avoiding interference and ensuring a smooth connection.

[0012] Preferably, the main body fixing component is provided with a fixing block, and an adjusting rod is connected to the fixing block. The adjusting rod drives the fixing block to press against the main body of the housing. The adjusting rod and the fixing block ensure the fixing effect of the active fixing component on the main body of the housing.

[0013] A welding method includes the following steps:

[0014] S1. Connect the main body of the shell to the main body fixing component;

[0015] S2. Rotating the adjusting rod causes the fixed pressure block to press against the main body of the fixed housing;

[0016] S3. Secure the housing flange to the connecting and fixing assembly;

[0017] S4. Place the shell flange against the shell body and weld it.

[0018] Preferably, the housing flange is connected to the follower rotating ring. Rotating the active rotating ring causes the follower rotating ring to rotate, and the follower rotating ring synchronously causes the housing flange to rotate relative to the housing body until the connecting arc surface is in contact with the connecting cylinder. The elastic element squeezes the follower rotating ring, causing the connecting arc surface to be in contact with the squeezed connecting cylinder.

[0019] The beneficial effects of this invention are as follows:

[0020] (1) It can fix the shell flange relative to the shell body during the welding process, thereby improving the accuracy of the welding process and improving the welding quality;

[0021] (2) It can improve the adjustment flexibility between the connecting arc surface and the connecting cylinder, ensure the tight fit between the two, and avoid interference. Attached Figure Description

[0022] Figure 1 This is an isometric view of the present invention.

[0023] Figure 2 yes Figure 1 The first partial isometric view in the image.

[0024] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0025] Figure 4 yes Figure 1 The second partial isometric view in the image.

[0026] Figure 5 This is a schematic diagram of the structure of Example 2.

[0027] Figure 6 This is a cross-sectional view of Example 3.

[0028] Figure 7 This is a partial enlarged view of Example 3.

[0029] In the picture:

[0030] 1. Main body fixing component; 11. Horizontal plate fixing component; 12. Vertical plate fixing component; 13. Fixing pressure block; 14. Adjusting rod;

[0031] 2 Connecting and fixing components, 21 Clamping unit, 211 Pressing block, 212 Locking bolt, 213 Connecting groove, 22 Rotating ring, 221 Active rotating ring, 222 Follower rotating ring, 223 Telescopic column, 224 Elastic element;

[0032] 3. Shell body, 31. Base plate unit, 32. Vertical plate unit, 33. Connecting cylinder;

[0033] 4. Shell flange, 41. Connecting section, 42. Outer plate, 43. Connecting arc surface. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1:

[0036] like Figure 1 As shown, an ultra-low temperature shell welding auxiliary device includes a main body fixing assembly 1, which is connected to the shell body 3. Several connecting fixing assemblies 2 are detachably connected to the main body fixing assembly 1, and the connecting fixing assemblies 2 are connected to the shell flange 4, which in turn is connected to the shell body 3. The shell flange 4 is fixed by the connecting fixing assemblies 2, and the shell body 3 is fixed by the main body fixing assembly 1. The detachable connection between the connecting fixing assemblies 2 and the main body fixing assembly 1 ensures the flexibility and stability of the connection, and allows for the replacement of the connecting fixing assemblies 2 according to actual usage requirements, thus ensuring the flexibility of the device's use.

[0037] like Figure 1 , 4 As shown, the housing flange 4 includes a connecting section 41 and an outer plate 42. The outer plate 42 is connected to the connecting and fixing assembly 2, and the connecting section 41 is connected to the housing body 3. The connecting and fixing assembly 2 is provided with a clamping unit 21 for clamping the outer plate 42. By clamping the outer plate 42 with the clamping unit 21, welding space can be provided between the connecting section 41 and the housing body 3, while ensuring the fixing effect of the housing flange 4.

[0038] like Figure 2 , 3 As shown, the clamping unit 21 includes a clamping block 211, which is rotatably connected to a locking bolt 212. The locking bolt 212 rotates, causing the clamping block 211 to press against the outer plate 42. The locking bolt 212 is provided on the connecting and fixing assembly 2. The locking bolt 212 drives the clamping block 211 to move, thereby clamping the outer plate 42 onto the connecting and fixing assembly 2 to ensure the stability of the connection.

[0039] like Figure 3 As shown, the clamping block 211 is provided with a connecting groove 213, the shape of which is adapted to the edge shape of the outer plate 42. This improves the compatibility with the outer plate 42 and ensures the stability of the clamping.

[0040] like Figure 2 As shown, the main body fixing component 1 includes a horizontal plate fixing component 11 and a vertical plate fixing component 12. The housing body 3 includes a bottom plate unit 31 connected to the horizontal plate fixing component 11 and a vertical plate unit 32 connected to the vertical plate fixing component 12. The axial directions of the bottom plate unit 31 and the vertical plate unit 32 are intersected.

[0041] The assembly and operation process of the cryogenic shell welding auxiliary device in this embodiment is as follows: In this embodiment, the cryogenic shell includes a shell body 3 and a shell flange 4. The shell body 3 includes a base plate unit 31 and a vertical plate unit 32. The base plate unit 31 and the vertical plate unit 32 are both cylindrical structures. The axes of the base plate unit 31 and the vertical plate unit 32 are staggered. The vertical plate unit 32 is laterally connected to the base plate unit 31. Both the vertical plate unit 32 and the base plate unit 31 are provided with connecting cylinders 33.

[0042] Multiple housing flanges 4 are connected to the connecting cylinder 33 on the vertical plate unit 32. Each housing flange 4 includes a connecting section 41 and an outer plate 42. The connecting section 41 is connected to the connecting cylinder 33, and welding is required at the connection point. In this embodiment, the housing flange 4 is cylindrical. Each connecting cylinder 33 is connected to housing flanges 4 of different specifications as needed. The outer plate 42 on the housing flange 4 is a flat plate-shaped annular structure. The edge of the outer plate 42 is connected to the edge of the connecting end. The connecting and fixing assembly 2 fixes and constrains the housing flange 4 by connecting the outer plate 42.

[0043] In this embodiment, the connecting and fixing assembly 2 includes a clamping unit 21, which can clamp the flat outer plate 42 to ensure clamping stability. Furthermore, in this embodiment, the clamping unit 21 includes a pressing block 211 and a locking bolt 212. The pressing block 211 abuts against the outer plate 42 for clamping. Therefore, the shape of the connection between the pressing block 211 and the outer plate 42 is adapted to the edge shape of the outer plate 42, so that it can better adapt to the shape of the outer plate 42 for clamping and improve the clamping stability. In this embodiment, the locking bolt 212 is rotatably connected to the connecting and fixing assembly 2, and the end of the locking bolt 212 is connected to the pressing block 211 and drives the pressing block 211 to move synchronously in the axial direction, thereby realizing the locking and clamping effect of the pressing block 211 on the outer plate 42 and ensuring that the outer plate 42 can drive the connection end to maintain the fixed effect.

[0044] In this embodiment, the connecting fixing component 2 and the main fixing component 1 are detachably connected. After the connecting fixing component 2 is engaged and connected to the main fixing component 1 through the positioning groove, the connecting fixing component 2 is locked in the positioning groove by the connecting bolt, thereby ensuring the stability of the position of the connecting fixing component 2.

[0045] Furthermore, in this embodiment, a through hole is provided in the horizontal plate fixing member 11. The position of the through hole corresponds to the bottom plate unit 31. During the assembly process, after the connecting cylinder 33 is inserted into the bottom plate unit 31, the housing body 3 is assembled. It is also necessary to weld the connection position between the connecting cylinder 33 and the bottom plate unit 31. The connection position between the connecting cylinder 33 and the bottom plate unit 31 is welded through the through hole. Therefore, the bottom plate unit 31 is a ring structure. Similarly, the vertical plate unit 32 is also a ring structure. The same through hole is also provided in the vertical plate fixing member 12. During the welding process, the connection part between the vertical plate unit 32 and the vertical plate fixing member 12 can be welded and fixed through the through hole, which improves the convenience of welding.

[0046] Furthermore, in this embodiment, a fixing block 13 and an adjusting rod 14 are provided on the horizontal plate fixing member 11 and the vertical plate fixing member 12. The adjusting rod 14 can drive the fixing block 13 to press and fix the base plate unit 31 and the vertical plate unit 32, thereby ensuring that the position of the base plate unit 31 and the vertical plate unit 32 relative to the main body fixing component 1 is stable. At the same time, since several holes are provided on the base plate unit 31 and the vertical plate unit 32, during the process of fixing the base plate unit 31 and the vertical plate unit 32, the holes are connected by pins and fixed to the horizontal plate fixing member 11 or the vertical plate fixing member 12, thereby ensuring that the circumferential position of the base plate unit 31 and the vertical plate fixing member 32 relative to the horizontal plate fixing member 11 and the vertical plate fixing member 12 is stable. The axial and radial positions are fixed and limited by the fixing block 13 and the adjusting rod 14.

[0047] Example 2:

[0048] like Figure 5 As shown, unlike Embodiment 1, this embodiment has a connecting cylinder 33 on the housing body 3, and a connecting arc surface 43 on the side of the housing flange 4 near the connecting cylinder 33. The connecting and fixing assembly 2 includes a rotating ring 22, which is connected to the housing flange 4 and drives the housing flange 4 to rotate around its axis. During the rotation of the rotating ring 22, the housing flange 4 can be driven to rotate synchronously, thereby enabling the housing flange 4 to rotate around its axis. This allows the connecting arc surface 43 on the flange housing to be fitted with the connecting cylinder 33 during installation, ensuring a complete fit between the connecting arc surface 43 and the connecting cylinder 33.

[0049] The assembly and operation process of the ultra-low temperature shell welding auxiliary device in this embodiment is as follows: In this embodiment, a rotating ring 22 is provided on the connecting and fixing component 2, wherein the rotating ring 22 can rotate relative to the connecting and fixing component 2. In this embodiment, the shell flange 4 is fixed on the rotating ring 22, so that during the rotation of the rotating ring 22, the shell flange 4 can be driven to rotate synchronously, thereby enabling the shell flange 4 to rotate around the axis, so that the connecting arc surface 43 on the flange shell can be fitted to the connecting cylinder 33 during the installation process, thereby ensuring that the connecting arc surface 43 and the connecting cylinder 33 can be completely fitted.

[0050] Furthermore, in this embodiment, the locking bolt 212 and the clamping block 211 on the connecting and fixing assembly 2 are fixed on the rotating ring 22, thereby ensuring that the locking bolt 212 and the clamping block 211 rotate synchronously with the rotating ring 22 during the rotation of the rotating ring 22. Therefore, during the alignment of the housing flange 4 and the connecting cylinder 33, the housing flange 4 can be fixed on the rotating ring 22 first, and then the circumferential rotation of the housing flange 4 can be performed, thereby ensuring the stability of the housing flange 4 relative to the connecting and fixing assembly 2 during the rotation.

[0051] Furthermore, in this embodiment, the cryogenic shell includes a shell body 3 and a shell flange 4. The shell body 3 includes a bottom plate unit 31 and a vertical plate unit 32. The bottom plate unit 31 and the vertical plate unit 32 are both cylindrical in shape. The axes of the bottom plate unit 31 and the vertical plate unit 32 are staggered. The vertical plate unit 32 is laterally connected to the bottom plate unit 31. Both the vertical plate unit 32 and the bottom plate unit 31 are provided with connecting cylinders 33.

[0052] Multiple housing flanges 4 are connected to the connecting cylinder 33 on the vertical plate unit 32. Each housing flange 4 includes a connecting section 41 and an outer plate 42. The connecting section 41 is connected to the connecting cylinder 33, and welding is required at the connection point. In this embodiment, the housing flange 4 is cylindrical. Each connecting cylinder 33 is connected to housing flanges 4 of different specifications as needed. The outer plate 42 on the housing flange 4 is a flat plate-shaped annular structure. The edge of the outer plate 42 is connected to the edge of the connecting end. The connecting and fixing assembly 2 fixes and constrains the housing flange 4 by connecting the outer plate 42.

[0053] In this embodiment, the connecting and fixing assembly 2 includes a clamping unit 21, which can clamp the flat outer plate 42 to ensure clamping stability. Furthermore, in this embodiment, the clamping unit 21 includes a pressing block 211 and a locking bolt 212. The pressing block 211 abuts against the outer plate 42 for clamping. Therefore, the shape of the connection between the pressing block 211 and the outer plate 42 is adapted to the edge shape of the outer plate 42, so that it can better adapt to the shape of the outer plate 42 for clamping and improve the clamping stability. In this embodiment, the locking bolt 212 is rotatably connected to the connecting and fixing assembly 2, and the end of the locking bolt 212 is connected to the pressing block 211 and drives the pressing block 211 to move synchronously in the axial direction, thereby realizing the locking and clamping effect of the pressing block 211 on the outer plate 42 and ensuring that the outer plate 42 can drive the connection end to maintain the fixed effect.

[0054] In this embodiment, the connecting fixing component 2 and the main fixing component 1 are detachably connected. After the connecting fixing component 2 is engaged and connected to the main fixing component 1 through the positioning groove, the connecting fixing component 2 is locked in the positioning groove by the connecting bolt, thereby ensuring the stability of the position of the connecting fixing component 2.

[0055] Furthermore, in this embodiment, a through hole is provided in the horizontal plate fixing member 11. The position of the through hole corresponds to the bottom plate unit 31. During the assembly process, after the connecting cylinder 33 is inserted into the bottom plate unit 31, the housing body 3 is assembled. It is also necessary to weld the connection position between the connecting cylinder 33 and the bottom plate unit 31. The connection position between the connecting cylinder 33 and the bottom plate unit 31 is welded through the through hole. Therefore, the bottom plate unit 31 is a ring structure. Similarly, the vertical plate unit 32 is also a ring structure. The same through hole is also provided in the vertical plate fixing member 12. During the welding process, the connection part between the vertical plate unit 32 and the vertical plate fixing member 12 can be welded and fixed through the through hole, which improves the convenience of welding.

[0056] Furthermore, in this embodiment, a fixing block 13 and an adjusting rod 14 are provided on the horizontal plate fixing member 11 and the vertical plate fixing member 12. The adjusting rod 14 can drive the fixing block 13 to press and fix the base plate unit 31 and the vertical plate unit 32, thereby ensuring that the position of the base plate unit 31 and the vertical plate unit 32 relative to the main body fixing component 1 is stable. At the same time, since several holes are provided on the base plate unit 31 and the vertical plate unit 32, during the process of fixing the base plate unit 31 and the vertical plate unit 32, the holes are connected by pins and fixed to the horizontal plate fixing member 11 or the vertical plate fixing member 12, thereby ensuring that the circumferential position of the base plate unit 31 and the vertical plate fixing member 32 relative to the horizontal plate fixing member 11 and the vertical plate fixing member 12 is stable. The axial and radial positions are fixed and limited by the fixing block 13 and the adjusting rod 14.

[0057] Example 3:

[0058] like Figure 6 , 7 As shown, unlike Embodiment 1, the rotating ring 22 in this embodiment includes an active rotating ring 221 and a follower rotating ring 222. The active rotating ring 221 is rotatably connected to the connecting and fixing component 2, while the follower rotating ring 222 is slidably connected to the connecting and fixing component 2 and can rotate relative to the connecting and fixing component 2. A telescopic column 223 is provided between the follower rotating ring and the active rotating ring 221, and an elastic element 224 is sleeved on the telescopic column 223. The active rotating ring 221 can drive the follower rotating ring 222 to move synchronously via the connected telescopic column 223. The follower rotating ring 222 drives the housing flange 4 to move synchronously via the locking bolt 212 and the clamping block 211. Since the housing flange 4 is provided with a connecting arc surface 43, the connecting arc surface 43 will abut against the connecting cylinder 33 at different positions during rotation, resulting in axial compressive force on the follower rotating ring 222. During this process, the follower rotating ring 222, telescopic column 223, locking bolt 212, clamping block 211, and housing flange 4 move synchronously relative to the active rotating ring 221. As the active rotating ring 221 rotates, the connecting arc surface 43 continuously changes. The contact position between the connecting arc surface 43 and the connecting cylinder 33 continues until the connecting arc surface 43 is completely in contact with the connecting cylinder 33. At this point, due to the compression effect of the elastic element 224 on the housing flange 4, the housing flange 4 remains in contact with the connecting cylinder 33. Because the arc surface is in contact and is subjected to the compression force of the elastic element 224, the housing flange 4 is in a state of maximum rotational resistance, ensuring stable docking between the connecting arc surface 43 and the connecting cylinder 33. Furthermore, during use, it can adaptively rotate by relying on the elastic compression effect of the elastic element 224. During rotation, the connecting arc surface 43, due to the compression of the elastic element 224, tends to form a connection state that is completely in contact with the connecting cylinder 33. When the connecting housing flange 4 is connected to the connecting fixing assembly 2, the follower rotating ring 222 can be compressed, thereby creating a moving gap between the connecting arc surface 43 and the connecting cylinder 33, avoiding interference and ensuring smooth connection.

[0059] The assembly and operation process of the ultra-low temperature shell welding auxiliary device in this embodiment is as follows: Unlike the rotating ring 22 in Embodiment 2, the rotating ring 22 in this embodiment is divided into an active rotating ring 221 and a follower rotating ring 222. The active rotating ring 221 is rotatably connected to the connecting and fixing component 2, while the follower rotating ring 222 is also rotatably connected to the connecting and fixing component 2. At the same time, the follower rotating ring 222 is also slidably connected to the connecting and fixing component 2 along the axial direction. Therefore, the active rotating ring 221 can only rotate relative to the connecting and fixing component 2, while the follower rotating ring 222 can rotate and move axially relative to the connecting and fixing component 2.

[0060] Therefore, in this embodiment, a telescopic column 223 is provided between the active rotating ring 221 and the follower rotating ring 222, and an elastic element 224 is provided on the telescopic column 223, so that the follower rotating ring 222 can perform telescopic movement relative to the active rotating ring 221, and the elastic element 224 can maintain the position of the follower rotating ring 222 and restore its original position, so that when the follower rotating ring 222 is subjected to axial pressure during rotation, it can telescopically move relative to the active rotating ring 221. In this embodiment, the housing flange 4 is connected to the follower rotating ring 222, which can follow the rotation and sliding synchronous movement of the follower rotating ring 222. In this embodiment, the follower rotating ring 222 and the telescopic column 223 move synchronously relative to the active rotating ring 221. The locking bolt 212 on the connecting and fixing assembly 2 is located inside the telescopic column 223. The locking bolt 212 can move relative to the telescopic column 223, thereby driving the pressing block 211 to press the housing flange 4. Since the locking bolt 212 moves relative to the telescopic column 223, it will not affect the elastic element 224 during the pressing of the housing flange 4.

[0061] Therefore, in this embodiment, during the rotation of the active rotating ring 221, the active rotating ring 221 can drive the follower rotating ring 222 to move synchronously through the connected telescopic column 223. The follower rotating ring 222 drives the housing flange 4 to move synchronously through the locking bolt 212 and the clamping block 211. Since the housing flange 4 is provided with a connecting arc surface 43, the connecting arc surface 43 will abut against the connecting cylinder 33 at different positions during the rotation, resulting in axial compressive force on the follower rotating ring 222. During this process, the follower rotating ring 222, the telescopic column 223, the locking bolt 212, the clamping block 211, and the housing flange 4 move synchronously relative to the active rotating ring 221. The rotation action continuously changes the contact position between the connecting arc surface 43 and the connecting cylinder 33 until the connecting arc surface 43 is completely in contact with the connecting cylinder 33. At this time, due to the compression effect of the elastic element 224 on the housing flange 4, the housing flange 4 remains in contact with the connecting cylinder 33. Since the arc surface is in contact and is subjected to the compression force of the elastic element 224, the housing flange 4 is in the state of maximum rotational resistance, ensuring the stable docking of the connecting arc surface 43 and the connecting cylinder 33. In the process of use, it can adapt to rotation by relying on the elastic compression effect of the elastic element 224. During the rotation, the connecting arc surface 43 will tend to be in a connection state of complete contact with the connecting cylinder 33 due to the compression of the elastic element 224.

[0062] In this embodiment, the relative movement of the follower ring 222 and the active ring 221 improves the flexibility of adjusting the position of the housing flange 4. The position of the housing flange 4 can be adjusted after the clamping block 211 locks it. Furthermore, when connecting the housing flange 4 to the connecting fixing assembly 2, the follower ring 222 can be compressed, thereby creating a moving gap between the connecting arc surface 43 and the connecting cylinder 33, avoiding interference and ensuring smooth connection.

[0063] Furthermore, in this embodiment, the cryogenic shell includes a shell body 3 and a shell flange 4. The shell body 3 includes a bottom plate unit 31 and a vertical plate unit 32. The bottom plate unit 31 and the vertical plate unit 32 are both cylindrical in shape. The axes of the bottom plate unit 31 and the vertical plate unit 32 are staggered. The vertical plate unit 32 is laterally connected to the bottom plate unit 31. Both the vertical plate unit 32 and the bottom plate unit 31 are provided with connecting cylinders 33.

[0064] Multiple housing flanges 4 are connected to the connecting cylinder 33 on the vertical plate unit 32. Each housing flange 4 includes a connecting section 41 and an outer plate 42. The connecting section 41 is connected to the connecting cylinder 33, and welding is required at the connection point. In this embodiment, the housing flange 4 is cylindrical. Each connecting cylinder 33 is connected to housing flanges 4 of different specifications as needed. The outer plate 42 on the housing flange 4 is a flat plate-shaped annular structure. The edge of the outer plate 42 is connected to the edge of the connecting end. The connecting and fixing assembly 2 fixes and constrains the housing flange 4 by connecting the outer plate 42.

[0065] In this embodiment, the connecting and fixing assembly 2 includes a clamping unit 21, which can clamp the flat outer plate 42 to ensure clamping stability. Furthermore, in this embodiment, the clamping unit 21 includes a pressing block 211 and a locking bolt 212. The pressing block 211 abuts against the outer plate 42 for clamping. Therefore, the shape of the connection between the pressing block 211 and the outer plate 42 is adapted to the edge shape of the outer plate 42, so that it can better adapt to the shape of the outer plate 42 for clamping and improve the clamping stability. In this embodiment, the locking bolt 212 is rotatably connected to the connecting and fixing assembly 2, and the end of the locking bolt 212 is connected to the pressing block 211 and drives the pressing block 211 to move synchronously in the axial direction, thereby realizing the locking and clamping effect of the pressing block 211 on the outer plate 42 and ensuring that the outer plate 42 can drive the connection end to maintain the fixed effect.

[0066] In this embodiment, the connecting fixing component 2 and the main fixing component 1 are detachably connected. After the connecting fixing component 2 is engaged and connected to the main fixing component 1 through the positioning groove, the connecting fixing component 2 is locked in the positioning groove by the connecting bolt, thereby ensuring the stability of the position of the connecting fixing component 2.

[0067] Furthermore, in this embodiment, a through hole is provided in the horizontal plate fixing member 11. The position of the through hole corresponds to the bottom plate unit 31. During the assembly process, after the connecting cylinder 33 is inserted into the bottom plate unit 31, the housing body 3 is assembled. It is also necessary to weld the connection position between the connecting cylinder 33 and the bottom plate unit 31. The connection position between the connecting cylinder 33 and the bottom plate unit 31 is welded through the through hole. Therefore, the bottom plate unit 31 is a ring structure. Similarly, the vertical plate unit 32 is also a ring structure. The same through hole is also provided in the vertical plate fixing member 12. During the welding process, the connection part between the vertical plate unit 32 and the vertical plate fixing member 12 can be welded and fixed through the through hole, which improves the convenience of welding.

[0068] Furthermore, in this embodiment, a fixing block 13 and an adjusting rod 14 are provided on the horizontal plate fixing member 11 and the vertical plate fixing member 12. The adjusting rod 14 can drive the fixing block 13 to press and fix the base plate unit 31 and the vertical plate unit 32, thereby ensuring that the position of the base plate unit 31 and the vertical plate unit 32 relative to the main body fixing component 1 is stable. At the same time, since several holes are provided on the base plate unit 31 and the vertical plate unit 32, during the process of fixing the base plate unit 31 and the vertical plate unit 32, the holes are connected by pins and fixed to the horizontal plate fixing member 11 or the vertical plate fixing member 12, thereby ensuring that the circumferential position of the base plate unit 31 and the vertical plate fixing member 32 relative to the horizontal plate fixing member 11 and the vertical plate fixing member 12 is stable. The axial and radial positions are fixed and limited by the fixing block 13 and the adjusting rod 14.

Claims

1. A cryogenic shell welding auxiliary device, characterized in that, It includes a main fixing assembly, which is connected to the housing body. Several connecting fixing assemblies are detachably connected to the main fixing assembly. The connecting fixing assemblies include a rotating ring, which is connected to the housing flange, and the housing flange is connected to the housing body. A connecting cylinder is provided on the housing body. A connecting arc surface is provided on the side of the housing flange near the connecting cylinder. The rotating ring drives the housing flange to rotate around the axis. The rotating ring includes a driving rotating ring and a following rotating ring. The driving rotating ring is only rotatably connected to the connecting fixing assembly, and the following rotating ring is slidably connected to the connecting fixing assembly and can rotate relative to the connecting fixing assembly. A telescopic column is provided between the following rotating ring and the driving rotating ring, and an elastic element is sleeved on the telescopic column.

2. The cryogenic shell welding auxiliary device according to claim 1, characterized in that, The housing flange includes a connecting section and an outer plate. The outer plate is connected to the connecting and fixing assembly, the connecting section is connected to the housing body, and the connecting and fixing assembly is provided with a clamping unit for clamping the outer plate.

3. The cryogenic shell welding auxiliary device according to claim 2, characterized in that, The clamping unit includes a clamping block, which is rotatably connected to a locking bolt. The rotation of the locking bolt causes the clamping block to press against the outer plate.

4. The cryogenic shell welding auxiliary device according to claim 3, characterized in that, The clamping block is provided with a connecting groove, the shape of which is adapted to the shape of the outer panel edge.

5. The cryogenic shell welding auxiliary device according to claim 1, characterized in that, The main fixing components include horizontal plate fixing parts and vertical plate fixing parts. The main body of the shell includes a bottom plate unit connected to the horizontal plate fixing parts and a vertical plate unit connected to the vertical plate fixing parts. The axial directions of the bottom plate unit and the vertical plate unit are intersected.

6. A cryogenic shell welding auxiliary device according to any one of claims 1-5, characterized in that, A fixing block is provided on the main fixing component, and an adjusting rod is connected to the fixing block. The adjusting rod drives the fixing block to squeeze the main body of the shell.

7. A welding method, using an ultra-low temperature shell welding auxiliary device according to any one of claims 1-6, characterized in that, It includes the following steps: S1. Connect the main body of the shell to the main body fixing component; S2. Rotating the adjusting rod causes the fixed pressure block to press against the main body of the fixed housing; S3. Secure the housing flange to the connecting and fixing assembly; S4. Place the shell flange against the shell body and weld it.

8. A welding method according to claim 7, characterized in that, Connect the housing flange to the follower ring. Rotate the driving ring, which drives the follower ring to rotate. The follower ring then synchronously drives the housing flange to rotate relative to the housing body until the connecting arc surface fits against the connecting cylinder. The elastic element squeezes the follower ring, causing the connecting arc surface to fit against and squeeze the connecting cylinder.

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