Ultralow-temperature shell welding auxiliary device and welding method

Abstract

The ultralow-temperature shell welding auxiliary device comprises a main body fixing assembly, the main body fixing assembly is connected with a shell main body, a plurality of connecting and fixing assemblies are detachably connected to the main body fixing assembly, the connecting and fixing assemblies are connected with a shell flange, and the shell flange is connected with the shell main body. The shell flange is fixed through the connecting and fixing assembly, the shell body is fixed through the body fixing assembly, then through detachable connection between the connecting and fixing assembly and the body fixing assembly, the connecting flexibility and stability can be guaranteed, and the connecting and fixing assembly can be replaced according to actual use requirements; therefore, the use flexibility of the device is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of cryogenic equipment, and in particular to an ultra-low temperature shell welding auxiliary device and a welding method. Background Art

[0002] With the rapid development of the semiconductor industry and the medical industry, more and more cryogenic equipment is being applied to these industries. The ultra-low temperature shell is one of the core components. The welding accuracy and welding quality of this component play a key role in the normal operation of the cryogenic equipment. The ultra-low temperature shell is made of ultra-thin stainless steel through welding and machining. The quality of welding directly affects the cooling effect, processing size, service life and stability. For example, the publication number "CN220636782U" discloses "a semiconductor cryogenic pump branch pipe flange welding tool", including a bottom plate, a vertical plate and a slide plate. A circular countersunk hole is opened on the bottom plate for placing the straight barrel part of the pump shell. The vertical plate is vertically connected to the bottom plate, and the slide plate is height-adjustably connected to the vertical plate. The slide plate is used to connect the branch pipe flange; wherein the position of the vertical plate and the circular countersunk hole is configured so that the branch pipe flange can be just vertically inserted into the straight barrel part of the pump shell. However, in actual applications, this type of device cannot be adaptively installed with welding fixation between the shell flange and the ultra-low temperature shell. Summary of the invention

[0003] In view of the problem that the prior art mentioned in the background technology is unable to 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 relatively 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 solutions.

[0005] A super-low temperature shell welding auxiliary device includes a main body fixing component, the main body fixing component is connected to the shell body, the main body fixing component is detachably connected to a plurality of connecting and fixing components, the connecting and fixing components are connected to the shell flange, and the shell flange is connected to the shell body. The shell flange is fixed by the connecting and fixing component, and the shell body is fixed by the main body fixing component, and then the connection flexibility and stability can be ensured by the detachable connection between the connecting and fixing component and the main body fixing component, and the connecting and fixing component can be replaced according to actual use requirements, thereby ensuring the flexibility of the device.

[0006] Preferably, the shell 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 shell body, and the connecting and fixing assembly is provided with a clamping unit for clamping the outer plate. The clamping unit clamps the outer plate, so that the connecting section can leave a welding operation space with the shell body, while ensuring the fixing effect of the shell flange.

[0007] Preferably, the clamping unit includes a clamping block, which is rotatably connected to a locking bolt, and the locking bolt rotates to drive the clamping block to squeeze the outer plate. A locking bolt is provided on the connection and fixing assembly, and the locking bolt drives the clamping block to move, thereby clamping the outer plate on the connection and fixing assembly to ensure the stability of the connection.

[0008] Preferably, the pressing block is provided with a connection groove, the shape of which is adapted to the shape of the edge of the outer plate, so as to improve the connection adaptability with the outer plate and ensure the stability of the pressing.

[0009] Preferably, the main body fixing assembly includes a horizontal plate fixing member and a vertical plate fixing member, and the shell 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, and the axial directions of the bottom plate unit and the vertical plate unit are staggered.

[0010] Preferably, a connecting cylinder is provided on the shell body, a connecting arc surface is provided on the side of the shell flange close to the connecting cylinder, and the connecting and fixing assembly includes a rotating ring, the rotating ring is connected to the shell flange, and the rotating ring drives the shell flange to rotate around the axis. During the rotation of the rotating ring, the shell flange can be synchronously driven to rotate synchronously, and then the shell flange can be rotated around the axis, so that the connecting arc surface on the flange shell can be fitted with the connecting cylinder during the installation process, and then the connecting arc surface and the connecting cylinder can be completely fitted.

[0011] Preferably, the rotating ring includes an active rotating ring and a follower rotating ring, the active rotating ring is only rotatably connected to the connecting and fixing component, the follower rotating ring is slidably connected to the connecting and fixing component and can rotate relative to the connecting and fixing component, and a telescopic column is arranged between the follower rotating ring and the active rotating ring, and an elastic member is sleeved on the telescopic column. The active swivel can drive the follower swivel to move synchronously through the connected telescopic column, and the follower swivel drives the shell flange to move synchronously through the locking bolt and the clamping block. Since a connecting arc surface is provided on the shell flange, the connecting arc surface will abut against the connecting tube at different positions during the rotation process, resulting in an axial extrusion force on the follower swivel. In this process, the follower swivel, the telescopic column, the locking bolt, the clamping block, and the shell flange move synchronously relative to the active swivel, and with the rotation of the active swivel, the abutment position of the connecting arc surface and the connecting tube is continuously changed until the connecting arc surface is completely fitted with the connecting tube. At this time, the elastic member maintains an extrusion effect on the shell flange, so that the shell flange remains fitted on the connecting tube. At this time, due to the fit of the arc surface and the extrusion force of the elastic member, the shell flange is in a state of maximum rotational resistance, which ensures that the docking of the connecting arc surface and the connecting tube is stable, and during use, it can rely on the elastic extrusion effect of the elastic member to perform adaptive rotation. The connecting arc surface relies on the extrusion of the elastic member during the rotation process to produce a connection state that tends to be completely fitted with the connecting tube. When the shell flange is connected to the connecting and fixing component, the follower swivel can be compressed, so that a moving gap can be generated between the connecting arc surface and the connecting cylinder to avoid interference and ensure the smoothness of the connection.

[0012] Preferably, the main body fixing assembly is provided with a fixed pressing block, the fixed pressing block is connected with an adjusting rod, and the adjusting rod drives the fixed pressing block to squeeze the shell body. The adjusting rod and the fixed pressing block ensure the fixing effect of the active fixing assembly on the shell body.

[0013] A welding method comprises the following steps: S1, connecting the shell body to the main body fixing assembly; S2, rotating the adjusting rod to drive the fixed pressing block to squeeze the fixed shell body; S3, fixing the housing flange to the connection and fixing assembly; S4. Abut the shell flange against the shell body and weld it.

[0014] Preferably, the shell flange is connected to the follower swivel, and the active swivel is rotated. The active swivel drives the follower swivel to rotate, and the follower swivel synchronously drives the shell flange to rotate relative to the shell body until the connecting arc surface fits the connecting tube. The elastic part squeezes the follower swivel to drive the connecting arc surface to fit the connecting tube.

[0015] The beneficial effects of the present invention are as follows: (1) During the welding process, the shell flange can be relatively fixed relative to the shell body, thereby improving the accuracy of the welding process and improving the welding quality; (2) It can improve the adjustment flexibility between the connecting arc surface and the connecting tube, ensure the tight fit between the two, and avoid interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an axonometric view of the present invention.

[0017] Figure 2 yes Figure 1 First partial axonometric drawing of the .

[0018] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0019] Figure 4 yes Figure 1 Second detailed axonometric drawing of .

[0020] Figure 5 It is a structural schematic diagram of Example 2.

[0021] Figure 6 This is a cross-sectional view of Example 3.

[0022] Figure 7 This is a partial enlarged view of Example 3.

[0023] In the figure: 1 main body fixing assembly, 11 horizontal plate fixing piece, 12 vertical plate fixing piece, 13 fixing pressing block, 14 adjusting rod; 2 connecting and fixing assembly, 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 member; 3 shell body, 31 bottom plate unit, 32 vertical plate unit, 33 connecting tube; 4 shell flange, 41 connecting section, 42 outer plate, 43 connecting arc surface. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] Embodiment 1: like Figure 1As shown, an ultra-low temperature shell welding auxiliary device includes a main body fixing component 1, the main body fixing component 1 is connected to the shell body 3, a plurality of connecting and fixing components 2 are detachably connected to the main body fixing component 1, the connecting and fixing components 2 are connected to the shell flange 4, and the shell flange 4 is connected to the shell body 3. The shell flange 4 is fixed by the connecting and fixing components 2, and the shell body 3 is fixed by the main body fixing component 1, and then the connection between the connecting and fixing components 2 and the main body fixing components 1 is detachably connected, so that the flexibility and stability of the connection can be guaranteed, and the connecting and fixing components 2 can be replaced according to actual use requirements, so as to ensure the flexibility of the device.

[0026] 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, the connecting section 41 is connected to the housing body 3, and the connecting and fixing assembly 2 is provided with a clamping unit 21 for clamping the outer plate 42. The clamping unit 21 clamps the outer plate 42, so that the connecting section 41 can leave a welding operation space with the housing body 3, while ensuring the fixing effect of the housing flange 4.

[0027] like Figure 2 , 3 As shown, the clamping unit 21 includes a clamping block 211, and the clamping block 211 is rotatably connected to a locking bolt 212, and the locking bolt 212 rotates to drive the clamping block 211 to squeeze the outer plate 42. The locking bolt 212 is provided on the connection and fixing component 2, and the locking bolt 212 drives the clamping block 211 to move, so that the outer plate 42 is clamped on the connection and fixing component 2 to ensure the stability of the connection.

[0028] like Figure 3 As shown, the pressing block 211 is provided with a connecting groove 213, and the shape of the connecting groove 213 is adapted to the shape of the edge of the outer plate 42, so as to improve the connection adaptability with the outer plate 42 and ensure the stability of the pressing.

[0029] like Figure 2 As shown, the main body fixing assembly 1 includes a horizontal plate fixing member 11 and a vertical plate fixing member 12, and the shell body 3 includes a bottom plate unit 31 connected to the horizontal plate fixing member 11 and a vertical plate unit 32 connected to the vertical plate fixing member 12, and the axial directions of the bottom plate unit 31 and the vertical plate unit 32 are staggered.

[0030] The assembly and working process of the ultra-low temperature shell welding auxiliary device in this embodiment are as follows: In this embodiment, the ultra-low temperature shell includes a shell body 3 and a shell flange 4, wherein the shell body 3 includes a bottom plate unit 31 and a vertical plate unit 32, and the overall shape of the bottom plate unit 31 and the vertical plate unit 32 are both cylindrical structures, wherein the axial directions of the bottom plate unit 31 and the vertical plate unit 32 are staggered, and the vertical plate unit 32 is laterally connected to the bottom plate unit 31, and the vertical plate unit 32 and the bottom plate unit 31 are both provided with connecting tubes 33.

[0031] A plurality of shell flanges 4 are connected to the connecting tube 33 on the vertical plate unit 32, wherein each shell flange 4 includes a connecting section 41 and an outer plate 42, wherein the connecting section 41 is connected to the connecting tube 33, and welding is required at the connection between the two. The shell flange 4 in this embodiment is cylindrical in shape, and each connecting tube 33 is connected to shell flanges 4 of different specifications as needed, wherein the outer plate 42 on the shell flange 4 is a flat plate-shaped annular structure, and the edge of the outer plate 42 is connected to the edge position of the connecting end, and the connecting and fixing component 2 fixes and constrains the shell flange 4 by connecting the outer plate 42.

[0032] In the present embodiment, the connecting and fixing component 2 includes a clamping unit 21, which can clamp the outer plate 42 of the flat structure, thereby ensuring the stability of the clamping. Furthermore, in the present embodiment, the clamping unit 21 includes a clamping block 211 and a locking bolt 212. The clamping block 211 abuts against the outer plate 42 for clamping, so that the shape of the connection between the clamping block 211 and the outer plate 42 is adapted to the edge shape of the outer plate 42, so that it can be more adapted to the shape of the outer plate 42 for clamping, thereby improving the stability of the clamping. In the present embodiment, the locking bolt 212 is rotatably connected to the connecting and fixing component 2, and the end of the locking bolt 212 is connected to the clamping block 211 and drives the clamping block 211 to perform axial synchronous movement, thereby realizing the locking and clamping effect of the clamping block 211 on the outer plate 42, ensuring that the outer plate 42 can drive the connection end to maintain a fixed effect.

[0033] In this embodiment, the connection and fixing component 2 and the main body fixing component 1 are detachably connected. After the connection and fixing component 2 is snap-connected to the main body fixing component 1 through the positioning groove, the connection and fixing component 2 is locked in the positioning groove through the connecting bolt, thereby ensuring the stable position of the connection and fixing component 2.

[0034] Furthermore, in the present embodiment, a through hole is provided on the transverse plate fixing member 11, and the position of the through hole corresponds to the bottom of the bottom plate unit 31. During the assembly process, after the connecting tube 33 is inserted into the bottom plate unit 31, the assembly of the shell body 3 is completed, and the connection position between the connecting tube 33 and the bottom plate unit 31 needs to be welded and assembled. The position where the connecting tube 33 connects to the bottom plate unit 31 is welded by passing through the through hole, so that the bottom plate unit 31 is an annular structure. Similarly, the vertical plate unit 32 is also an annular structure, and the same through hole is also provided on the vertical plate fixing member 12. During the welding process, the connection position between the vertical plate unit 32 and the vertical plate fixing member 12 can be welded and fixed through the through hole, thereby improving the convenience of welding.

[0035] Furthermore, in the present embodiment, a fixing pressure block 13 and an adjusting rod 14 are provided on the transverse plate fixing member 11 and the vertical plate fixing member 12, and the adjusting rod 14 can drive the fixing pressure block 13 to squeeze and fix the bottom plate unit 31 and the vertical plate unit 32, thereby ensuring that the bottom plate unit 31 and the vertical plate unit 32 are in a stable position relative to the main fixing assembly 1. At the same time, since a plurality of holes are provided on the bottom plate unit 31 and the vertical plate unit 32, in the process of fixing the bottom plate unit 31 and the vertical plate unit 32, the holes are connected by pins and fixed to the transverse plate fixing member 11 or the vertical plate fixing member 12, thereby ensuring that the circumferential position of the bottom plate unit 31 and the vertical plate unit 32 relative to the transverse plate fixing member 11 and the vertical plate fixing member 12 is stable, and the axial position and radial position are stable and fixed and limited by the fixing pressure block 13 and the adjusting rod 14.

[0036] Embodiment 2: like Figure 5 As shown, different from the embodiment 1, in this embodiment, a connecting cylinder 33 is provided on the shell body 3, a connecting arc surface 43 is provided on the side of the shell flange 4 close to the connecting cylinder 33, and the connecting and fixing assembly 2 includes a rotating ring 22, the rotating ring 22 is connected to the shell flange 4, and the rotating ring 22 drives the shell flange 4 to rotate around the axis. During the rotation of the rotating ring 22, the shell flange 4 can be synchronously driven to rotate synchronously, and then the shell flange 4 can be rotated 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, and then the connecting arc surface 43 and the connecting cylinder 33 can be ensured to be completely fitted.

[0037] The assembly and working 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, wherein 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 synchronously driven to rotate synchronously, and then the shell flange 4 can be rotated around the axis, so that the connecting arc surface 43 on the flange shell can be fitted with the connecting tube 33 during the installation process, thereby ensuring that the connecting arc surface 43 and the connecting tube 33 can be completely fitted.

[0038] Furthermore, in this embodiment, the locking bolt 212 and the clamping block 211 on the connecting and fixing component 2 are fixed on the rotating ring 22, so that during the rotation of the rotating ring 22, the locking bolt 212 and the clamping block 211 can be kept rotating synchronously with the rotating ring 22. Therefore, in the process of aligning the shell flange 4 and the connecting tube 33, the shell flange 4 can be first fixed on the rotating ring 22, and then the shell flange 4 can be rotated circumferentially, thereby ensuring the stability of the shell flange 4 relative to the connecting and fixing component 2 during the rotation process.

[0039] Furthermore, in the present embodiment, the ultra-low temperature shell includes a shell body 3 and a shell flange 4, wherein the shell body 3 includes a bottom plate unit 31 and a vertical plate unit 32, and the overall shape of the bottom plate unit 31 and the vertical plate unit 32 are both cylindrical structures, wherein the axial directions 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, and the vertical plate unit 32 and the bottom plate unit 31 are both provided with connecting tubes 33.

[0040] A plurality of shell flanges 4 are connected to the connecting tube 33 on the vertical plate unit 32, wherein each shell flange 4 includes a connecting section 41 and an outer plate 42, wherein the connecting section 41 is connected to the connecting tube 33, and welding is required at the connection between the two. The shell flange 4 in this embodiment is cylindrical in shape, and each connecting tube 33 is connected to shell flanges 4 of different specifications as needed, wherein the outer plate 42 on the shell flange 4 is a flat plate-shaped annular structure, and the edge of the outer plate 42 is connected to the edge position of the connecting end, and the connecting and fixing component 2 fixes and constrains the shell flange 4 by connecting the outer plate 42.

[0041] In the present embodiment, the connecting and fixing component 2 includes a clamping unit 21, which can clamp the outer plate 42 of the flat structure, thereby ensuring the stability of the clamping. Furthermore, in the present embodiment, the clamping unit 21 includes a clamping block 211 and a locking bolt 212. The clamping block 211 abuts against the outer plate 42 for clamping, so that the shape of the connection between the clamping block 211 and the outer plate 42 is adapted to the edge shape of the outer plate 42, so that it can be more adapted to the shape of the outer plate 42 for clamping, thereby improving the stability of the clamping. In the present embodiment, the locking bolt 212 is rotatably connected to the connecting and fixing component 2, and the end of the locking bolt 212 is connected to the clamping block 211 and drives the clamping block 211 to perform axial synchronous movement, thereby realizing the locking and clamping effect of the clamping block 211 on the outer plate 42, ensuring that the outer plate 42 can drive the connection end to maintain a fixed effect.

[0042] In this embodiment, the connection and fixing component 2 and the main body fixing component 1 are detachably connected. After the connection and fixing component 2 is snap-connected to the main body fixing component 1 through the positioning groove, the connection and fixing component 2 is locked in the positioning groove through the connecting bolt, thereby ensuring the stable position of the connection and fixing component 2.

[0043] Furthermore, in the present embodiment, a through hole is provided on the transverse plate fixing member 11, and the position of the through hole corresponds to the bottom of the bottom plate unit 31. During the assembly process, after the connecting tube 33 is inserted into the bottom plate unit 31, the assembly of the shell body 3 is completed, and the connection position between the connecting tube 33 and the bottom plate unit 31 needs to be welded and assembled. The position where the connecting tube 33 connects to the bottom plate unit 31 is welded by passing through the through hole, so that the bottom plate unit 31 is an annular structure. Similarly, the vertical plate unit 32 is also an annular structure, and the same through hole is also provided on the vertical plate fixing member 12. During the welding process, the connection position between the vertical plate unit 32 and the vertical plate fixing member 12 can be welded and fixed through the through hole, thereby improving the convenience of welding.

[0044] Furthermore, in the present embodiment, a fixing pressure block 13 and an adjusting rod 14 are provided on the transverse plate fixing member 11 and the vertical plate fixing member 12, and the adjusting rod 14 can drive the fixing pressure block 13 to squeeze and fix the bottom plate unit 31 and the vertical plate unit 32, thereby ensuring that the bottom plate unit 31 and the vertical plate unit 32 are in a stable position relative to the main fixing assembly 1. At the same time, since a plurality of holes are provided on the bottom plate unit 31 and the vertical plate unit 32, in the process of fixing the bottom plate unit 31 and the vertical plate unit 32, the holes are connected by pins and fixed to the transverse plate fixing member 11 or the vertical plate fixing member 12, thereby ensuring that the circumferential position of the bottom plate unit 31 and the vertical plate unit 32 relative to the transverse plate fixing member 11 and the vertical plate fixing member 12 is stable, and the axial position and radial position are stable and fixed and limited by the fixing pressure block 13 and the adjusting rod 14.

[0045] Embodiment 3: like Figure 6 , 7 As shown, different from Example 1, the rotating ring 22 in this embodiment includes an active rotating ring 221 and a follower converter 222. The active rotating ring 221 is only rotatably connected to the connecting and fixing component 2, and the follower converter 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 arranged between the follower rotating ring and the active rotating ring 221, and an elastic member 224 is sleeved on the telescopic column 223. The active swivel 221 can drive the follower converter 222 to move synchronously through the connected telescopic column 223, and the follower converter 222 drives the shell flange 4 to move synchronously through the locking bolt 212 and the clamping block 211. Since the shell flange 4 is provided with a connecting arc surface 43, the connecting arc surface 43 will abut against the connecting tube 33 at different positions during the rotation process, resulting in an axial extrusion force on the follower converter 222. In this process, the follower converter 222, the telescopic column 223, the locking bolt 212, the clamping block 211, and the shell flange 4 move synchronously relative to the active swivel 221, and as the active swivel 221 rotates, the connecting arc surface 43 is continuously changed. The connection arc surface 43 is in contact with the connection tube 33 until the connection arc surface 43 is completely fitted with the connection tube 33. At this time, the elastic member 224 maintains the squeezing effect on the shell flange 4, so that the shell flange 4 is kept in contact with the connection tube 33. At this time, due to the fit of the arc surface and the squeezing force of the elastic member 224, the shell flange 4 is in a state of maximum rotation resistance, ensuring the stability of the docking between the connection arc surface 43 and the connection tube 33. In the process of use, the connection arc surface 43 can rely on the elastic squeezing effect of the elastic member 224 to perform adaptive rotation. The connection arc surface 43 relies on the squeezing of the elastic member 224 during the rotation process to produce a connection state that tends to be completely fitted with the connection tube 33. When the shell flange 4 is connected to the connection fixing component 2, the follow-up conversion 222 can be compressed, so that a moving gap can be generated between the connection arc surface 43 and the connection tube 33 to avoid interference and ensure the smoothness of the connection.

[0046] The assembly and working process of the ultra-low temperature shell welding auxiliary device in this embodiment are as follows: Different from the rotating ring 22 in Example 2, the rotating ring 22 in this embodiment is divided into an active rotating ring 221 and a follower conversion 222, wherein the active rotating ring 221 is rotatably connected to the connecting and fixing component 2, and the follower conversion 222 is also rotatably connected to the connecting and fixing component 2, and at the same time, the follower conversion 222 is also slidably connected to the connecting and fixing component 2 along the axial direction, so that the active rotating ring 221 can only rotate relative to the connecting and fixing component 2, while the follower conversion 222 can rotate and move axially relative to the connecting and fixing component 2.

[0047] Therefore, further, in the present embodiment, a telescopic column 223 is provided between the active swivel 221 and the follower converter 222, and an elastic member 224 is provided on the telescopic column 223, so that the follower converter 222 can perform telescopic movement relative to the active swivel 221, and the elastic member 224 can maintain the position fixing and restoring effect of the follower converter 222, so that when the follower converter 222 is subjected to axial pressure during the rotation process, it can be telescoped relative to the active swivel 221. In the present embodiment, the shell flange 4 is connected to the follow-up converter 222, and can follow the rotation and sliding of the follow-up converter 222 to move synchronously. In the present embodiment, the follow-up converter 222 and the telescopic column 223 move synchronously relative to the active swivel 221. The locking bolt 212 on the connecting and fixing component 2 is arranged inside the telescopic column 223. The locking bolt 212 can move relative to the telescopic column 223, thereby driving the clamping block 211 to clamp the shell flange 4. Since the locking bolt 212 moves relative to the telescopic column 223, the elastic member 224 will not be affected during the process of clamping the shell flange 4.

[0048] Therefore, in the present embodiment, during the rotation of the active swivel 221, the active swivel 221 can drive the follower converter 222 to move synchronously through the connected telescopic column 223, and the follower converter 222 drives the shell flange 4 to move synchronously through the locking bolt 212 and the clamping block 211. Since the shell flange 4 is provided with a connecting arc surface 43, the connecting arc surface 43 will abut against the connecting tube 33 at different positions during the rotation process, resulting in an axial extrusion force on the follower converter 222. During this process, the follower converter 222, the telescopic column 223, the locking bolt 212, the clamping block 211, and the shell flange 4 move synchronously relative to the active swivel 221, and as the active swivel 221 is rotated, the follower converter 222 moves synchronously with the follower converter 222. The rotation action continuously changes the abutment position of the connecting arc surface 43 and the connecting tube 33 until the connecting arc surface 43 is completely fitted with the connecting tube 33. At this time, the elastic member 224 maintains the squeezing effect on the shell flange 4, so that the shell flange 4 remains fitted on the connecting tube 33. At this time, due to the fit of the arc surface and the squeezing force of the elastic member 224, the shell flange 4 is in a state of maximum rotational resistance, ensuring the stable docking of the connecting arc surface 43 and the connecting tube 33. During use, the elastic squeezing effect of the elastic member 224 can be relied on to perform adaptive rotation. During the rotation process, the connecting arc surface 43 relies on the squeezing of the elastic member 224 to produce a connection state that tends to be completely fitted with the connecting tube 33.

[0049] In this embodiment, the follow-up converter 222 and the active swivel ring 221 that can move relative to each other are used to improve the flexibility of adjusting the position of the shell flange 4. The position of the shell flange 4 can be adjusted after the clamping block 211 locks the shell flange 4. When the shell flange 4 is connected to the connecting and fixing component 2, the follow-up converter 222 can be compressed, thereby creating a moving gap between the connecting arc surface 43 and the connecting tube 33 to avoid interference and ensure the smoothness of the connection.

[0050] Furthermore, in the present embodiment, the ultra-low temperature shell includes a shell body 3 and a shell flange 4, wherein the shell body 3 includes a bottom plate unit 31 and a vertical plate unit 32, and the overall shape of the bottom plate unit 31 and the vertical plate unit 32 are both cylindrical structures, wherein the axial directions 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, and the vertical plate unit 32 and the bottom plate unit 31 are both provided with connecting tubes 33.

[0051] A plurality of shell flanges 4 are connected to the connecting tube 33 on the vertical plate unit 32, wherein each shell flange 4 includes a connecting section 41 and an outer plate 42, wherein the connecting section 41 is connected to the connecting tube 33, and welding is required at the connection between the two. The shell flange 4 in this embodiment is cylindrical in shape, and each connecting tube 33 is connected to shell flanges 4 of different specifications as needed, wherein the outer plate 42 on the shell flange 4 is a flat plate-shaped annular structure, and the edge of the outer plate 42 is connected to the edge position of the connecting end, and the connecting and fixing component 2 fixes and constrains the shell flange 4 by connecting the outer plate 42.

[0052] In the present embodiment, the connecting and fixing component 2 includes a clamping unit 21, which can clamp the outer plate 42 of the flat structure, thereby ensuring the stability of the clamping. Furthermore, in the present embodiment, the clamping unit 21 includes a clamping block 211 and a locking bolt 212. The clamping block 211 abuts against the outer plate 42 for clamping, so that the shape of the connection between the clamping block 211 and the outer plate 42 is adapted to the edge shape of the outer plate 42, so that it can be more adapted to the shape of the outer plate 42 for clamping, thereby improving the stability of the clamping. In the present embodiment, the locking bolt 212 is rotatably connected to the connecting and fixing component 2, and the end of the locking bolt 212 is connected to the clamping block 211 and drives the clamping block 211 to perform axial synchronous movement, thereby realizing the locking and clamping effect of the clamping block 211 on the outer plate 42, ensuring that the outer plate 42 can drive the connection end to maintain a fixed effect.

[0053] In this embodiment, the connection and fixing component 2 and the main body fixing component 1 are detachably connected. After the connection and fixing component 2 is snap-connected to the main body fixing component 1 through the positioning groove, the connection and fixing component 2 is locked in the positioning groove through the connecting bolt, thereby ensuring the stable position of the connection and fixing component 2.

[0054] Furthermore, in the present embodiment, a through hole is provided on the transverse plate fixing member 11, and the position of the through hole corresponds to the bottom of the bottom plate unit 31. During the assembly process, after the connecting tube 33 is inserted into the bottom plate unit 31, the assembly of the shell body 3 is completed, and the connection position between the connecting tube 33 and the bottom plate unit 31 needs to be welded and assembled. The position where the connecting tube 33 connects to the bottom plate unit 31 is welded by passing through the through hole, so that the bottom plate unit 31 is an annular structure. Similarly, the vertical plate unit 32 is also an annular structure, and the same through hole is also provided on the vertical plate fixing member 12. During the welding process, the connection position between the vertical plate unit 32 and the vertical plate fixing member 12 can be welded and fixed through the through hole, thereby improving the convenience of welding.

[0055] Furthermore, in the present embodiment, a fixing pressure block 13 and an adjusting rod 14 are provided on the transverse plate fixing member 11 and the vertical plate fixing member 12, and the adjusting rod 14 can drive the fixing pressure block 13 to squeeze and fix the bottom plate unit 31 and the vertical plate unit 32, thereby ensuring that the bottom plate unit 31 and the vertical plate unit 32 are in a stable position relative to the main fixing assembly 1. At the same time, since a plurality of holes are provided on the bottom plate unit 31 and the vertical plate unit 32, in the process of fixing the bottom plate unit 31 and the vertical plate unit 32, the holes are connected by pins and fixed to the transverse plate fixing member 11 or the vertical plate fixing member 12, thereby ensuring that the circumferential position of the bottom plate unit 31 and the vertical plate unit 32 relative to the transverse plate fixing member 11 and the vertical plate fixing member 12 is stable, and the axial position and radial position are stable and fixed and limited by the fixing pressure block 13 and the adjusting rod 14.

Claims

1. An auxiliary device for ultra-low temperature shell welding, characterized in that: The invention comprises a main body fixing component (1), wherein the main body fixing component (1) is connected to a shell body (3), a plurality of connecting and fixing components (2) are detachably connected to the main body fixing component (1), the connecting and fixing components (2) are connected to a shell flange (4), and the shell flange (4) is connected to the shell body (3).

2. According to the ultra-low temperature shell welding auxiliary device described in claim 1, it is characterized in that: The shell flange (4) comprises a connecting section (41) and an outer plate (42); the outer plate (42) is connected to a connecting and fixing assembly (2); the connecting section (41) is connected to a shell body (3); and a clamping unit (21) for clamping the outer plate (42) is provided on the connecting and fixing assembly (2).

3. According to the ultra-low temperature shell welding auxiliary device described in claim 2, it is characterized in that: The clamping unit (21) comprises a clamping block (211), and the clamping block (211) is rotatably connected to a locking bolt (212). The locking bolt (212) rotates to drive the clamping block (211) to squeeze the outer plate (42).

4. According to the ultra-low temperature shell welding auxiliary device described in claim 3, it is characterized in that: The pressing block (211) is provided with a connecting groove (213), and the shape of the connecting groove (213) is adapted to the shape of the edge of the outer plate (42).

5. According to the ultra-low temperature shell welding auxiliary device described in claim 1, it is characterized in that: The main body fixing assembly (1) comprises a transverse plate fixing member (11) and a vertical plate fixing member (12); the shell body (3) comprises a bottom plate unit (31) connected to the transverse plate fixing member (11) and a vertical plate unit (32) connected to the vertical plate fixing member (12); the axial directions of the bottom plate unit (31) and the vertical plate unit (32) are staggered.

6. The ultra-low temperature shell welding auxiliary device according to any one of claims 1 to 5, characterized in that: The shell body (3) is provided with a connecting cylinder (33), the shell flange (4) is provided with a connecting arc surface (43) on a side close to the connecting cylinder (33), and the connecting and fixing assembly (2) includes a rotating ring (22), the rotating ring (22) is connected to the shell flange (4), and the rotating ring (22) drives the shell flange (4) to rotate around an axis.

7. The ultra-low temperature shell welding auxiliary device according to claim 6, characterized in that: The rotating ring (22) comprises an active rotating ring (221) and a follower rotating ring (222); the active rotating ring (221) is only rotatably connected to the connecting and fixing component (2); 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 arranged between the follower rotating ring and the active rotating ring (221); and an elastic member (224) is sleeved on the telescopic column (223).

8. The ultra-low temperature shell welding auxiliary device according to any one of claims 1 to 5, characterized in that: The main body fixing assembly (1) is provided with a fixed pressing block (13), the fixed pressing block (13) is connected with an adjusting rod (14), and the adjusting rod (14) drives the fixed pressing block (13) to squeeze the shell body (3).

9. A welding method, using the ultra-low temperature shell welding auxiliary device according to any one of claims 1 to 8, characterized in that: The following steps are included: S1, connecting the housing body (3) to the main body fixing assembly (1); S2, rotating the adjusting rod (14) to drive the fixed pressing block (13) to squeeze the fixed housing body (3); S3, fixing the housing flange (4) on the connecting and fixing assembly (2); S4. Place the shell flange (4) against the shell body (3) and weld it.

10. A welding method according to claim 9, characterized in that: The housing flange (4) is connected to the follower swivel (222), and the active swivel (221) is rotated. The active swivel (221) drives the follower swivel (222) to rotate, and the follower swivel (222) synchronously drives the housing flange (4) to rotate relative to the housing body (3) until the connecting arc surface (43) fits the connecting tube (33). The elastic member (224) squeezes the follower swivel (222) to drive the connecting arc surface to fit and squeeze the connecting tube (33).

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