A flange plate welding deformation compensation device

Abstract

The application discloses a flange plate welding deformation compensation device and relates to the technical field of welding. With the cooperation of a partition type flexible constraint assembly and a ring-shaped support positioning assembly, the local heat affected zone in the flange plate welding process is subjected to targeted constraint force adjustment, which is different from the uniform constraint mode of the traditional overall rigid device, so that the constraint is more accurate. In the process, through independent pressure control and air pressure adjustment of each partition air cavity, combined with the real-time feedback of the temperature sensor and the laser displacement sensor, the constraint force of different regions can be dynamically changed, the stepwise force control from the initial pre-constraint to the local enhanced constraint and then to the cooling and pressure maintaining is realized. The mode can more targetedly match the local deformation trend of the flange plate caused by non-uniform heating, so that the overall and local deformation of the flange plate in the welding process is effectively inhibited, and the mode is more accurate than the traditional overall constraint mode.

Description

Technical Field

[0001] This invention relates to the field of welding technology, specifically to a flange welding deformation compensation device. Background Technology

[0002] A flange welding deformation compensation device is a device used to control or counteract the deformation of flanges caused by thermal stress and uneven cooling during the welding process. Its core principle is to ensure that the straightness, horizontality and verticality of the flange surface after welding meet high precision requirements through mechanical constraints, pre-deformation design, dynamic monitoring and adjustment, so as to avoid rework and increased costs.

[0003] Traditional flange welding deformation compensation devices often use an integral rigid device to apply uniform constraint force to the flange. This results in a localized non-uniform distribution of the heat-affected zone of the flange during the welding process. The temperature rises in the area directly affected by the welding arc, while the temperature is lower in the area away from the arc. This leads to insufficient or excessive constraint in some areas, ultimately causing loss of control over welding precision, damaging the sealing and structural strength of the welded part, and thus significantly affecting the welding effect.

[0004] Therefore, we propose a flange welding deformation compensation device to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a flange welding deformation compensation device. By leveraging the synergistic effect of a partitioned flexible constraint component and a ring support positioning component, it can perform targeted constraint force adjustment on the local heat-affected zone during the flange welding process. Unlike the uniform constraint method of traditional integral rigid devices, this device makes the constraint more precise. In this process, the air pressure is regulated by independent pressure control of each partitioned air chamber. With the real-time feedback from temperature sensors and laser displacement sensors, the constraint force in different areas can be dynamically changed, realizing a stepped force control from initial pre-constraint to local enhanced constraint and then to cooling and pressure holding.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a flange welding deformation compensation device, comprising a partitioned flexible constraint component, a support positioning component, a worktable, and a flange, wherein the top of the worktable is respectively provided with a partitioned flexible constraint component, an annular support positioning component, and a flange, and the partitioned flexible constraint component is installed on one side of the outer wall of the annular support positioning component;

[0007] The partitioned flexible restraint assembly includes six annular airbags, which are evenly distributed along the circumference to form six independent fan-shaped partitions. The six annular airbags are used to convert gas pressure into local flexible restraint force. A silicone spacer is sealed between the contact surfaces of every two annular airbags, and the six silicone spacers are used to physically isolate the six annular airbags to prevent gas from communicating with each other.

[0008] The annular support positioning assembly includes a rigid ring and a laser displacement sensor. The rigid ring has an overall annular cross-section in the shape of an L and is used to provide overall rigid positioning and reference constraint. The laser displacement sensor is used to dynamically capture local deformation data of the flange caused by thermal stress during welding.

[0009] Preferably, the partitioned flexible restraint assembly further includes six proportional valves, the air inlet of each of the six proportional valves being connected to an external air source, and the six proportional valves being used to precisely adjust the gas flow rate and pressure entering a corresponding annular airbag.

[0010] Preferably, the outlets of the six proportional valves are all connected to pressure sensors, and the six pressure sensors are used to monitor the actual pressure value of a corresponding annular airbag in real time. The outlets of the six pressure sensors are all connected to filters, and the six filters are used to filter out moisture and other impurities in the compressed air.

[0011] Preferably, the outlet of each of the six filters is connected to a one-way valve, and the six one-way valves are used to prevent the gas in the corresponding annular airbag from flowing back. The outlet of each of the six one-way valves is connected to a pipe, and the outlet of each of the six pipes is connected to the inlet of the corresponding annular airbag.

[0012] Preferably, temperature sensors are installed on the inner surfaces of the six annular airbags, and the six temperature sensors are used to monitor the temperature changes of each zone around the flange in real time.

[0013] Preferably, pressure sensors are installed on the inner surfaces of the six annular airbags, and the six pressure sensors are used to collect the actual air pressure value of the corresponding annular airbag in real time.

[0014] Preferably, the annular support positioning assembly further includes an annular guide rail, the bottom of which is connected to the top of the flange, and the annular guide rail is used to provide a motion reference in the circumferential direction. A T-slot is provided on the top of the annular guide rail, and four guide sliders are slidably connected between the inner walls of the T-slot.

[0015] Preferably, each of the four guide sliders has a threaded hole at its top, and a threaded rod is threaded between the inner surfaces of the four threaded holes. A handle is connected to the top of each of the four threaded rods.

[0016] Preferably, the bottom of each of the four threaded rods is connected to a friction plate, and the four friction plates are all made of wear-resistant material with a high coefficient of friction. Each of the four guide sliders has a connecting plate bolted to one side of its outer wall, and the four connecting plates are connected to the outer surface of the rigid ring.

[0017] Preferably, the bottom of the rigid ring is provided with a set of protrusions, and the bottom of the set of protrusions is connected to the top of the flange. The inner surface of the rigid ring is provided with a groove, and the inner surface of the groove is connected to the outer surface of the annular airbag. The outer surface of the rigid ring is bolted with two connecting parts, and one side of the outer wall of each of the two connecting parts is connected to one side of the outer wall of a corresponding laser displacement sensor.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In this invention, the synergistic effect of a partitioned flexible constraint component and a ring-shaped support positioning component allows for targeted adjustment of the constraint force in the local heat-affected zone during flange welding. This differs from the uniform constraint method of traditional integral rigid devices, resulting in more precise constraint. During this process, independent pressure control and air pressure regulation are implemented in each partitioned air chamber. Combined with real-time feedback from temperature sensors and laser displacement sensors, the constraint force magnitude in different areas can be dynamically changed, achieving a stepped force control from initial pre-constraint to local enhanced constraint and then to cooling and pressure holding. This method can more effectively match the local deformation trend of the flange caused by non-uniform heating, effectively suppressing both overall and local deformation during welding. Compared to traditional integral constraint methods, this is more precise. Furthermore, the L-shaped structure of the rigid ring and the guiding positioning of the ring guide rail work together to transmit local constraint force to suppress axial warping while ensuring the overall coaxiality of the flange, forming a synergistic mechanism of precise local compensation and overall frame stability. This effectively improves the dimensional accuracy and stability of flange welding. Attached Figure Description

[0020] Figure 1 This is a perspective view of the main structure of a flange welding deformation compensation device according to the present invention;

[0021] Figure 2 This is a side view perspective of the flange welding deformation compensation device of the present invention;

[0022] Figure 3 This is a diagram showing the positional relationship between the flexible constraint component and the annular support positioning component in a flange welding deformation compensation device of the present invention.

[0023] Figure 4 This is a three-dimensional structural view of the flexible constraint component in a flange welding deformation compensation device of the present invention;

[0024] Figure 5This is a schematic diagram showing the installation positions of the proportional valve, pressure sensor, filter, and check valve in a flange welding deformation compensation device of the present invention.

[0025] Figure 6 for Figure 4 Enlarged 3D view of the structure at point A in the middle;

[0026] Figure 7 This is a three-dimensional structural view of the annular support positioning component in a flange welding deformation compensation device of the present invention;

[0027] Figure 8 This is a schematic diagram of the installation positions of the connecting parts and the laser displacement sensor in a flange welding deformation compensation device of the present invention.

[0028] Figure 9 This is a schematic diagram of the installation positions of the rigid ring, protrusion, and groove in a flange welding deformation compensation device of the present invention.

[0029] Figure 10 This is a schematic diagram showing the installation positions of the threaded rod, handle, and friction plate in a flange welding deformation compensation device according to the present invention.

[0030] Figure 11 for Figure 9 Enlarged 3D view of the structure at point B.

[0031] In the diagram: 100, workbench; 200, flange; 300, flexible constraint assembly; 301, proportional valve; 302, air pressure sensor; 303, filter; 304, check valve; 305, pipe; 306, annular airbag; 307, temperature sensor; 308, pressure sensor; 309, silicone spacer; 400, annular support positioning assembly; 401, annular guide rail; 402, T-slot; 403, guide slider; 404, connecting plate; 405, threaded rod; 406, handle; 407, friction plate; 408, rigid ring; 409, protrusion; 410, groove; 411, coupling; 412, laser displacement sensor. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This embodiment mainly addresses the issue that traditional flange 200 welding deformation compensation devices often employ an integral rigid device to apply uniform constraint force to the flange 200. This results in a localized non-uniform distribution of the heat-affected zone of the flange 200 during the welding process. Consequently, the temperature rises in the area directly affected by the welding arc, while the temperature remains lower in areas far from the arc. This leads to situations where the constraint force is insufficient in some areas or excessively constrained in others, ultimately causing a loss of control over the welding precision, damaging the sealing and structural strength of the welded area, and significantly affecting the welding effect.

[0034] This embodiment addresses the problems of existing technologies by utilizing the synergistic effect of the partitioned flexible constraint component 300 and the annular support positioning component 400 to adjust the constraint force in the localized heat-affected zone during the welding process of the flange 200. This differs from the uniform constraint method of traditional rigid devices, resulting in more precise constraint. Furthermore, each partition's annular airbag 306 provides independent pressure control and air pressure regulation, coupled with real-time feedback from the temperature sensor 307 and the laser displacement sensor 412, dynamically changing the constraint force in different areas to achieve a transition from initial pre-constraint to localized enhancement. The stepped force control, from strong constraint to cooling and pressure holding, can more effectively match the local deformation trend of flange 200 caused by non-uniform heating, so that both overall and local deformation are effectively suppressed during the welding process. Compared with the traditional overall constraint method, it is more precise. Furthermore, the L-shaped structure of rigid ring 408 and the guiding and positioning of ring guide rail 401 work together to transmit local constraint force to suppress axial warping and ensure the overall coaxiality of flange 200. This forms a synergistic mechanism of precise local compensation and overall frame stability, thereby effectively improving the dimensional accuracy and stability of flange 200 welding.

[0035] Please see Figures 1-3 As shown, this embodiment discloses a flange welding deformation compensation device, a partitioned flexible constraint component 300, a support and positioning component 400, a workbench 100, and a flange 200. The top of the workbench 100 is respectively provided with the partitioned flexible constraint component 300, the annular support and positioning component 400, and the flange 200. The partitioned flexible constraint component 300 is installed on one side of the outer wall of the annular support and positioning component 400.

[0036] In use, first determine the specific working area of ​​the workbench 100, then fully fix the workbench 100 within the working area. After the workbench 100 is fully fixed, install the partitioned flexible constraint component 300, the support and positioning component 400, and the flange 200 on the top of the workbench 100 in sequence. The full fixation of the workbench 100 provides effective support for its connected components, thus ensuring the stability of the partitioned flexible constraint component 300 and the support and positioning component 400 during subsequent work. After all components are installed in sequence, the operator carefully checks for any looseness between the components. Next, connect the components requiring power to an external power source. Then, place the flange 200 to be welded fully on top of the workbench 100. In the annular support and positioning component 400, after adjusting the guide slider 403 along the annular guide rail 401 to the position suitable for the flange 200, the rigid ring 408 needs to be fixed by the connecting plate 404. Finally, the friction plate 407 is used to secure the guide slider 403 and the annular guide rail 400. The track 401 is fully fixed, with the rigid ring 408 serving as a reference frame. This ensures that the movement trajectory of all annular airbag 306 zones is concentric with the flange 200 to be welded, preventing zone offset from causing constraint misalignment. During processing, the control system sends commands to the proportional valves 301 in each annular airbag 306 zone. At this time, the proportional valves 301 open and output pressure. Compressed air enters each annular airbag 306 through the pipe 305, causing the annular airbag 306 to slowly expand and extend, and then gradually contact the outer surface of the flange 200. At the same time, the pressure sensor 302 provides real-time feedback on the pressure inside each annular airbag 306 zone. Secondly, the pressure sensor 308 detects in real-time the pressure of the actual contact between a corresponding annular airbag 306 and the flange 200. During continuous welding, the proportional valves 301 dynamically adjust the air intake of each annular airbag 306 zone according to the target pressure. The opening of the proportional valve 301 in the zone with increased temperature is increased, while the pressure sensor 302 provides real-time feedback on the actual pressure.

[0037] according to Figures 1-6 As shown, the partitioned flexible restraint assembly 300 includes six annular airbags 306, which are evenly distributed along the circumference to form six independent fan-shaped partitions. The six annular airbags 306 are used to convert gas pressure into local flexible restraint force. A silicone spacer 309 is used to seal and separate the contact surfaces of every two annular airbags 306, and the six silicone spacers 309 are used to physically isolate the six annular airbags 306 to prevent gas from communicating with each other.

[0038] The partitioned flexible restraint assembly 300 also includes six proportional valves 301, the air inlet of each of the six proportional valves 301 being connected to an external air source, and the six proportional valves 301 being used to precisely regulate the gas flow and pressure entering a corresponding annular airbag 306.

[0039] The outlets of the six proportional valves 301 are all connected to pressure sensors 302, and the six pressure sensors 302 are used to monitor the actual pressure value of the corresponding annular airbag 306 in real time. The outlets of the six pressure sensors 302 are all connected to filters 303, and the six filters 303 are used to filter out moisture and other impurities in the compressed air.

[0040] The outlets of the six filters 303 are all connected to one-way valves 304, and the six one-way valves 304 are used to prevent the gas in the corresponding annular airbag 306 from flowing back. The outlets of the six one-way valves 304 are all connected to pipes 305, and the outlets of the six pipes 305 are all connected to the inlet of the corresponding annular airbag 306.

[0041] Temperature sensors 307 are installed on the inner surface of each of the six annular airbags 306, and the six temperature sensors 307 are used to monitor the temperature changes of each zone around the flange 200 in real time.

[0042] Pressure sensors 308 are installed on the inner surface of each of the six annular airbags 306, and the six pressure sensors 308 are used to collect the actual air pressure value of the corresponding annular airbag 306 in real time.

[0043] In use, by pre-setting the above components, a complete partitioned flexible constraint assembly 300 is formed. First, the control system sends pre-constraint commands to the six proportional valves 301 respectively. At this time, the six proportional valves 301 open synchronously to a small degree, causing the purified compressed air to pass through the pressure sensor 302, the one-way valve 304, and the pipeline 305 in sequence, and slowly enter the corresponding annular airbag 306. Subsequently, under the action of the proportional valves 301, the annular airbag 306 will gradually expand, and its inner surface will continuously be close to the outer surface of the flange 200. During this process, the pressure sensor 302 monitors the pressure value in each annular airbag 306 in real time, and the pressure sensor 308 directly detects the pressure in the annular airbag 306. The actual pressure in contact with flange 200 is monitored. When the pressure sensor 308 of one of the annular air bladders 306 fails to detect a contact signal, the operator can fine-tune the opening of the corresponding proportional valve 301 through the control system to increase the inflation volume of that annular air bladder 306 until it makes stable contact with flange 200, thus completing the pre-constraint calibration. After welding of flange 200 begins, the electric arc generated during welding will move along the circumference of the flange 200 bevel, causing a rapid increase in temperature in a local area. This causes the flange 200 in that area to begin to deform slightly due to thermal expansion. At this time, the temperature sensor 307 inside the annular air bladder 306 in this area captures the temperature in real time. The temperature rises sharply, and the data is fed back to the control system in real time. Simultaneously, the laser displacement sensor 412 inside the annular support positioning assembly 400 detects an increase in the radial deformation of the flange 200 in that area. At the same time, the control system sends a pressure-boosting command to the proportional valve 301 of the corresponding annular airbag 306. The proportional valve 301 then increases its opening, supplying gas to the annular airbag 306. The pressure sensor 302 feeds back the pressure value to the control system in real time, while the pressure sensor 308 provides real-time feedback on the increase in contact force. This strengthens the flexible constraint force in the corresponding area to suppress thermal expansion deformation. For lower-temperature areas far from the arc, the proportional valve 301 remains open, and the pressure in the annular airbag 306... Regional stability is achieved to prevent excessive constraint from causing reverse stress on flange 200. One-way valve 304 plays a crucial role in this process, preventing backflow of gas in each annular air bladder 306 due to pressure changes in adjacent areas. This ensures independent and stable pressure in each annular air bladder 306 zone. Filter 303 continuously filters the gas source to prevent impurities from entering proportional valve 301 and affecting adjustment accuracy. The entire zoned flexible constraint component 300 process achieves targeted constraint on local thermal deformation of flange 200 through precise control of six independent zones, combined with real-time feedback from various sensors and dynamic adjustment of proportional valve 301, thus ensuring stable control of the overall deformation of flange 200.

[0044] according to Figures 1-3 as well as Figures 7-11As shown, the annular support positioning assembly 400 includes a rigid ring 408 and a laser displacement sensor 412. The rigid ring 408 has an overall annular cross-section in the shape of an L and is used to provide overall rigid positioning and reference constraint. The laser displacement sensor 412 is used to dynamically capture local deformation data of the flange 200 caused by thermal stress during welding.

[0045] The annular support positioning assembly 400 also includes an annular guide rail 401, the bottom of which is connected to the top of the flange 200, and the annular guide rail 401 is used to provide a motion reference in the circumferential direction. A T-slot 402 is provided on the top of the annular guide rail 401, and four guide sliders 403 are slidably connected between the inner walls of the T-slot 402.

[0046] Each of the four guide sliders 403 has a threaded hole at its top, and a threaded rod 405 is threadedly connected between the inner surfaces of the four threaded holes. Each of the four threaded rods 405 has a handle 406 connected to its top.

[0047] The bottom of each of the four threaded rods 405 is connected to a friction plate 407, and the four friction plates 407 are all made of wear-resistant material with a high coefficient of friction. Each of the four guide sliders 403 has a connecting plate 404 bolted to one side of its outer wall, and the four connecting plates 404 are connected to the outer surface of the rigid ring 408.

[0048] The rigid ring 408 has a set of protrusions 409 at its bottom, and the bottom of the set of protrusions 409 is connected to the top of the flange 200. The inner surface of the rigid ring 408 has a groove 410, and the inner surface of the groove 410 is connected to the outer surface of the annular airbag 306. The outer surface of the rigid ring 408 is bolted with two connecting parts 411, and one side of the outer wall of each of the two connecting parts 411 is connected to one side of the outer wall of a corresponding laser displacement sensor 412.

[0049] In use, the above components form a complete annular support and positioning assembly 400. First, the operator smoothly installs the annular guide rail 401 on the top of the workbench 100, ensuring its center is concentric with the placement position of the flange 200. After all the annular support and positioning assemblies 400 are installed, the four guide sliders 403 are embedded into the T-slots 402 of the annular guide rail 401. Then, the operator gently pushes the guide sliders 403 to confirm that they can slide flexibly along the annular guide rail 401 without any jamming. At this point, the operator places the rigid ring 408 in the preset position and bolts it to the guide sliders 403 using four connecting plates 404. Finally, the flange 200 to be welded is placed on the workbench 100. Align its center with the center of the annular guide rail 401. Then, the operator pushes the guide slider 403 to slide along the T-slot 402 of the annular guide rail 401, causing the rigid ring 408 to move synchronously until the L-shaped inner wall of the rigid ring 408 aligns with the edge of the flange 200. This causes the protrusion 409 at the bottom of the rigid ring 408 to gently contact the surface of the flange 200, providing initial positioning while preventing the rigid ring 408 from completely fitting against the flange 200 and affecting heat dissipation. At this point, the groove 410 of the rigid ring 408 corresponds exactly to the outer side of the annular airbag 306 of the partitioned flexible restraint assembly 300, reserving sufficient space for subsequent restraint by the annular airbag 306. Once the position is adjusted, the operator rotates the four guide sliders in sequence. The handle 406 at the top of 403 drives the threaded rod 405 downwards. At this time, the friction plate 407 at the bottom of the threaded rod 405 moves downwards, gradually pressing against the top of the annular guide rail 401. The friction plate 407, through its high coefficient of friction, firmly locks the guide slider 403 to the annular guide rail 401, preventing displacement of the guide slider 403 due to vibration or constraint force transmission during welding. Welding of the flange 200 then begins. The rigid ring 408, leveraging its L-shaped structure, uses its vertical portion as a support frame for the annular airbag 306, evenly transmitting the local constraint force of the airbag to the annular guide rail 401. This prevents the flange 200 from shifting due to excessive local force, ensuring the coaxiality of the flange 200 during welding. The stability is achieved, and at the same time, the laser displacement sensor 412 installed on the joint 411 starts to work. The laser displacement sensor 412 emits a laser beam to the surface of the flange 200 to monitor the minute deformations in each area in real time. When a certain area of ​​the flange 200 bulges due to thermal expansion, the laser displacement sensor 412 transmits the deformation data to the control system in real time, providing a basis for the pressure adjustment of the partitioned flexible constraint assembly 300. The entire annular support positioning assembly 400, through the precise cooperation of the mechanical structure and the real-time monitoring of the laser displacement sensor 412, provides a stable positioning reference and deformation feedback for the welding of the flange 200, and together with the partitioned flexible constraint assembly 300, ensures the dimensional accuracy of the flange 200 after welding.

[0050] In a more specific scheme, based on the aforementioned partitioned flexible constraint component 300 and annular support positioning component 400, the final result achieved by combining the two is as follows:

[0051] The partitioned flexible constraint component 300 and the annular support positioning component 400, through the synergistic effect of precise local constraint and overall benchmark stability, completely overcome the limitation of traditional devices where uniform constraint force cannot adapt to local non-uniform thermal deformation. Utilizing the six independent annular airbags 306 of the partitioned flexible constraint component 300, and relying on the dynamic adjustment of the proportional valve 301 and the real-time feedback from the temperature sensor 307 and pressure sensor 308, the constraint force can be specifically enhanced in the high-temperature deformation zone affected by the welding arc, while maintaining a moderate constraint force in the low-temperature stable zone. This avoids uncontrolled deformation due to insufficient local constraint force or reverse stress caused by excessive constraint. Meanwhile, the rigid ring 408 of the annular support positioning component 400, through an L-shaped... The structure provides a rigid reference to cooperate with the precise positioning of the annular guide rail 401 and the guide slider 403, ensuring that the constraint force of all annular airbags 306 always revolves around the center of the flange 200. This design successfully avoids constraint misalignment caused by positioning offset, and ensures the overall coaxiality stability of the flange 200. Secondly, during the welding process, the laser displacement sensor 412 of the annular support positioning component 400 can capture the local deformation data of the flange 200 in real time, and link it in real time with the data monitored by the temperature sensor 307 and pressure sensor 308 in the partitioned flexible constraint component 300. Then, the control system drives the corresponding annular airbag 306 to adjust the pressure, thereby forming an effective closed-loop response.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flange welding deformation compensation device, characterized in that: The workbench (100) includes a partitioned flexible constraint component (300), a support and positioning component (400), a workbench (100), and a flange (200). The top of the workbench (100) is provided with a partitioned flexible constraint component (300), a ring support and positioning component (400), and a flange (200). The partitioned flexible constraint component (300) is installed on one side of the outer wall of the ring support and positioning component (400). The partitioned flexible restraint assembly (300) includes six annular airbags (306), which are evenly distributed along the circumference to form six independent fan-shaped partitions. The six annular airbags (306) are used to convert gas pressure into local flexible restraint force. A silicone spacer (309) is used to seal and separate the contact surfaces of every two annular airbags (306), and the six silicone spacers (309) are used to physically isolate the six annular airbags (306) to prevent gas from communicating with each other. The annular support positioning assembly (400) includes a rigid ring (408) and a laser displacement sensor (412). The rigid ring (408) has an overall annular cross section in the shape of an L and is used to provide overall rigid positioning and reference constraint. The laser displacement sensor (412) is used to dynamically capture the local deformation data of the flange (200) caused by thermal stress during welding. The annular support positioning assembly (400) also includes an annular guide rail (401), the bottom of which is connected to the top of the flange (200), and the annular guide rail (401) is used to provide a motion reference in the circumferential direction. A T-slot (402) is provided on the top of the annular guide rail (401), and four guide sliders (403) are slidably connected between the inner walls of the T-slot (402).

2. The flange welding deformation compensation device according to claim 1, characterized in that: The partitioned flexible restraint assembly (300) also includes six proportional valves (301), the air inlet of each of the six proportional valves (301) is connected to an external air source, and the six proportional valves (301) are used to precisely adjust the gas flow rate and pressure entering a corresponding annular airbag (306).

3. The flange welding deformation compensation device according to claim 2, characterized in that: The outlet of each of the six proportional valves (301) is connected to a pressure sensor (302), and the six pressure sensors (302) are used to monitor the actual pressure value of a corresponding annular airbag (306) in real time. The outlet of each of the six pressure sensors (302) is connected to a filter (303), and the six filters (303) are used to filter out moisture and impurities in the compressed air.

4. The flange welding deformation compensation device according to claim 3, characterized in that: The outlet of each of the six filters (303) is connected to a one-way valve (304), and the six one-way valves (304) are used to prevent the gas in the corresponding annular airbag (306) from flowing back. The outlet of each of the six one-way valves (304) is connected to a pipe (305), and the outlet of each of the six pipes (305) is connected to the inlet of the corresponding annular airbag (306).

5. The flange welding deformation compensation device according to claim 4, characterized in that: Temperature sensors (307) are installed on the inner surfaces of the six annular airbags (306), and the six temperature sensors (307) are used to monitor the temperature changes of each zone around the flange (200) in real time.

6. The flange welding deformation compensation device according to claim 5, characterized in that: Pressure sensors (308) are installed on the inner surfaces of the six annular airbags (306), and the six pressure sensors (308) are used to collect the actual pressure value of the corresponding annular airbag (306) in real time.

7. The flange welding deformation compensation device according to claim 1, characterized in that: Each of the four guide sliders (403) has a threaded hole at its top, and a threaded rod (405) is threaded between the inner surfaces of the four threaded holes. A handle (406) is connected to the top of each of the four threaded rods (405).

8. The flange welding deformation compensation device according to claim 7, characterized in that: The bottom of each of the four threaded rods (405) is connected to a friction plate (407), and the four friction plates (407) are all made of wear-resistant material with a high coefficient of friction. The outer wall of each of the four guide sliders (403) is bolted to a connecting plate (404), and the four connecting plates (404) are connected to the outer surface of the rigid ring (408).

9. The flange welding deformation compensation device according to claim 8, characterized in that: The rigid ring (408) has a set of protrusions (409) at its bottom, and the bottom of the set of protrusions (409) is connected to the top of the flange (200). The inner surface of the rigid ring (408) has a groove (410), and the inner surface of the groove (410) is connected to the outer surface of the annular airbag (306). The outer surface of the rigid ring (408) is bolted with two connecting parts (411), and one side of the outer wall of each of the two connecting parts (411) is connected to one side of the outer wall of a corresponding laser displacement sensor (412).

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