Welding system of supporting structure

Abstract

The invention provides a welding system of a supporting structure, and relates to the technical field of welding, the welding system of the supporting structure comprises a welding device and a rotary table, the welding device is arranged at a fixed position above the rotary table, and the rotary table is used for arranging the supporting structure and driving the supporting structure to rotate, the supporting structure comprises a supporting section cylinder and a supporting ring arranged in the supporting section cylinder, and the supporting ring and an annular boss on the inner wall of the supporting ring cylinder are welded through welding equipment. The welding quality of the supporting structure of the steam generator can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and in particular to a welding system for a supporting structure. Background Art

[0002] Integrated reactor pressure vessels (IRPVs) are crucial for the safe and stable operation of nuclear power plants. As core equipment, they are crucial for ensuring safe and stable operation. They are typically designed as an internal circulation structure, with the steam generator embedded within the vessel via a support structure at the bottom. This structure ensures the stability and safety of the steam generator within the vessel.

[0003] Existing forging technology cannot achieve integrated forging of the support structure, requiring only welded structures. However, due to the small size of the annular boss inside the support section cylinder and the supporting ring within it, the welding space between the annular boss and the supporting ring is narrow, making it difficult to control the welding gun during welding, affecting the welding quality. Summary of the Invention

[0004] The problem solved by the present invention is how to improve the welding quality of the supporting structure of the steam generator.

[0005] In order to solve the above problems, the present invention provides a welding system for a support structure.

[0006] In the first aspect, the present invention provides a welding system for a support structure, comprising a welding device and a turntable, wherein the welding device is arranged at a fixed position above the turntable, and the turntable is used to set the support structure and drive the support structure to rotate, wherein the support structure comprises a support section cylinder and a support ring arranged inside the support section cylinder, and the support ring and the annular boss on the inner wall of the support ring cylinder are welded by the welding device.

[0007] Optionally, the welding equipment includes an operating machine and a submerged arc welding trolley, the submerged arc welding trolley is connected to the operating machine through a connecting rod, and the submerged arc welding trolley is used to extend into the interior of the support section cylinder to weld the annular boss on the inner wall of the support ring cylinder and the support ring.

[0008] Optionally, the welding system further comprises a curved conductive nozzle, which is arranged at the front end of the submerged arc welding carriage and is used to clamp the welding wire to weld the annular boss on the inner wall of the support ring cylinder and the support ring.

[0009] Optionally, the welding process of welding the support ring and the annular boss on the inner wall of the support ring cylinder by the welding equipment includes: Dividing the annular groove at the connection between the support ring and the annular boss into a front annular groove and a back annular groove; The submerged arc welding trolley is controlled by the operating machine to weld the front groove and the back groove respectively.

[0010] Optionally, dividing the annular groove at the connection between the support ring and the annular boss into a front annular groove and a back annular groove comprises: Obtaining the groove depths of the annular grooves on both sides; The annular groove is divided into the front groove and the back groove according to the groove depth, wherein the groove depth of the front annular groove is greater than the groove depth of the back annular groove.

[0011] Optionally, controlling the submerged arc welding carriage to weld the front groove and the back groove respectively by the operating machine includes: The support structure is coaxially arranged above the turntable, wherein the front annular groove faces the submerged arc welding carriage; The submerged arc welding carriage is controlled by the operating machine to cooperate with the turntable to weld the front annular groove; After the front annular groove welding is completed, the support structure is turned over so that the back annular groove faces the submerged arc welding trolley; The submerged arc welding carriage is controlled by the operating machine to cooperate with the turntable to weld the back annular groove.

[0012] Optionally, controlling the submerged arc welding carriage to cooperate with the turntable through the operating machine to weld the front annular groove includes: Acquire a preset first welding process parameter of the submerged arc welding carriage and a first rotational speed of the turntable, wherein the first welding process parameter matches the first rotational speed of the turntable; The submerged arc welding carriage is controlled according to the first welding process parameters to weld the front annular groove driven to rotate by the turntable.

[0013] Optionally, the first welding process parameters include a first welding current, a first arc voltage, and a first heat input; and the first rotational speed satisfies: ; Among them, S1 is the first rotation speed, I1 is the first welding current, V1 is the first arc voltage, Q1 is the first heat input, and η1 is the first thermal efficiency parameter.

[0014] Optionally, controlling the submerged arc welding carriage to cooperate with the turntable through the operating machine to weld the back annular groove includes: Obtaining preset second welding process parameters of the submerged arc welding carriage and a second rotational speed of the turntable, wherein the second welding process parameters match the second rotational speed of the turntable; The submerged arc welding carriage is controlled according to the second welding process parameters to weld the back annular groove driven to rotate by the turntable.

[0015] Optionally, the second welding process parameters include a second welding current, a second arc voltage, and a second heat input; and the second rotational speed satisfies: ; Among them, S2 is the second speed, I2 is the second welding current, V2 is the second arc voltage, Q2 is the second heat input, and η2 is the second thermal efficiency parameter.

[0016] The beneficial effects of the support structure welding system of the present invention include: The fixed welding equipment ensures welding stability, avoids parameter fluctuations caused by equipment movement, ensures uniform and stable welding heat input, and reduces defects such as incomplete penetration and porosity. The turntable drives the support structure to rotate at a constant speed, forming a continuous circular trajectory between the support ring and the annular boss, ensuring continuity and consistency in the welding process, avoiding the arc start and arc end joint defects often associated with manual welding, and improving weld formation uniformity. Furthermore, the coordination of the welding equipment and the turntable allows the welding equipment to be aligned at an ideal angle within a narrow welding space from a fixed position, effectively avoiding interference between the equipment and the vessel inner wall, ensuring precise wire feeding and positioning of the welding gun, and being particularly suitable for high-quality welding of thick-walled support rings. Furthermore, the mechanized rotation operation reduces manual intervention and operational errors, and the standardized welding process improves first-pass pass rates, ensuring that key indicators such as weld fusion rate and mechanical properties (such as strength and toughness) meet connection strength requirements. This ensures the long-term use of the support structure and enhances the safety and reliability of the integrated reactor pressure vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a welding system for a support structure according to an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram at A in the middle; Figure 3 Schematic diagram of the partial structure of the integrated stack container according to an embodiment of the present invention.

[0018] Reference numerals: 1-integrated stack vessel; 2-steam generator; 3-support structure; 31-support section cylinder; 311-annular boss; 32-support ring; 4-steam outlet; 5-submerged arc welding trolley; 6-manipulator; 7-bending conductive nozzle; 8-turntable; a-front annular groove; b-back annular groove. DETAILED DESCRIPTION

[0019] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0020] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0021] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0022] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0023] The names of the messages or information exchanged between multiple devices in the embodiments of the present invention are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0024] It should be noted that if Figure 3As shown, the integrated reactor vessel 1 is a key piece of equipment in nuclear power plants and other nuclear energy facilities. It typically integrates core components such as the reactor core and steam generator 2. This compact structure greatly improves space utilization, effectively simplifies system layout, and significantly enhances safety and reliability. The black portion represents the shell of the integrated reactor vessel 1, or the body of the integrated reactor vessel 1, which is designed to withstand the pressure of the high-temperature, high-pressure reactor coolant and / or the radiation generated during reactor operation. The steam outlet 4 on the integrated reactor vessel 1 is the key channel for steam discharge. The heat generated by the reaction converts water into steam, which then flows out through this outlet to drive the turbine, thereby achieving energy conversion processes such as power generation. The support structure plays a crucial role in supporting and securing the steam generator 2. It not only bears the weight of the steam generator 2 itself, but also resists the pressure generated within the vessel and various mechanical loads that may be applied to the steam generator 2 during operation. This ensures that the steam generator 2 always maintains a stable position during operation, thereby ensuring the safe and stable operation of the steam generator 2 and the integrated reactor vessel 1.

[0025] In the related art, during the manufacturing process of the support structure 3, existing forging technology has limitations due to the complex shape, large thickness (for example, the support ring can be up to 310.8 mm thick), and high-precision forming requirements of the support structure 3, making it difficult to achieve integrated forging. Therefore, the support structure 3 is typically welded. However, the annular boss 311 on the inner side of the support section of the support structure 3 is relatively small (typically only 47 mm), creating an extremely narrow welding space with the support ring. This poses significant challenges to traditional welding processes. First, the narrow space makes it difficult for the welding torch to penetrate deeply and maintain a proper angle, which can easily interfere with the inner wall of the vessel, resulting in poor wire feeding and weld position deviation. Second, conventional methods such as manual arc welding (MAW) have difficulty accurately controlling heat input and welding torch trajectory when welding thick walls (for example, conventional welding thicknesses far exceeding 100 mm), which can easily lead to defects such as incomplete penetration, porosity, and slag inclusions. Furthermore, manual operation is unstable, making it difficult to meet the high reliability requirements of the equipment. These issues directly affect the welding quality of the support structure, potentially threatening the structural safety and long-term operational stability of the integrated reactor pressure vessel.

[0026] In response to the problems existing in the above-mentioned related technologies, an embodiment of the present invention provides a welding system for a support structure.

[0027] like Figures 1 to 3As shown, an embodiment of the present invention provides a welding system for a support structure 3, including a welding device and a turntable 8, wherein the welding device is arranged at a fixed position above the turntable 8, and the turntable 8 is used to set the support structure 3 and drive the support structure 3 to rotate, wherein the support structure 3 includes a support section cylinder 31 and a support ring 32 arranged inside the support section cylinder 31, and the support ring 32 is welded to the annular boss 311 on the inner wall of the cylinder of the support ring 32 by the welding device.

[0028] Specifically, the support structure 3 mainly includes a support section cylinder 31 and a support ring 32 installed inside the support section cylinder 31. The support ring 32 needs to be welded to the annular boss 311 on the inner wall of the support section cylinder 31 through welding equipment, and then the support ring 32 is fixedly connected to the annular boss 311 to obtain a structurally stable support structure 3, so that the bottom of the steam generator 2 can be supported by the support structure 3, wherein the bottom of the steam generator 2 can be provided with a protrusion matching the support ring 32 inside the support structure 3, and the protrusion can be provided in the support ring 32 to prevent the steam generator 2 from shaking during the operation of the integrated stack container 1, and at the same time, the bottom of the steam generator 2 is abutted against the top of the support section cylinder 31, and the steam generator 2 is supported by the support section cylinder 31.

[0029] Furthermore, when welding the annular boss 311 and the support ring 32, the rotation function of the turntable 8 can dynamically present the welding position of the support structure 3 arranged thereon under the welding equipment, so that the fixed welding equipment can uniformly weld the annular weld between the annular boss 311 and the support ring 32, effectively solving the problems of limited welding gun angle and discontinuous welding trajectory caused by the narrow space in traditional manual welding. At the same time, through the coordination of mechanized rotation and fixed welding equipment, the stability and consistency of the welding process are improved, and the welding quality is ensured.

[0030] For example, before welding, the support section cylinder 31 is first placed at the center of the turntable 8, while ensuring that the center line of the support section cylinder 31 coincides with the axial direction of the turntable 8. This ensures that the support section cylinder 31 can rotate coaxially with the turntable 8, so that the welding trajectory between the annular boss 311 and the support ring 32 is circular, so that the fixed welding equipment can perform stable welding with uniform welding parameters, and the rotation speed of the turntable 8 needs to be matched with the process parameters of the welding equipment, that is, the rotation speed of the turntable 8 must meet the welding speed of the welding equipment, so as to ensure that the welding equipment can uniformly weld the annular boss 311 and the support ring 32. During welding, the welding equipment needs to control the conductive nozzle to extend into the interior of the support section cylinder 31, that is, the connection between the annular boss 311 and the support ring 32, and adjust the position of the welding wire according to the position of the connection, so as to control the welding equipment to weld the weld at the connection as the turntable 8 rotates.

[0031] In this embodiment, the use of fixed welding equipment ensures welding stability, avoids parameter fluctuations caused by equipment movement, ensures uniform and stable welding heat input, and reduces defects such as incomplete penetration and porosity. The turntable 8 drives the support structure 3 to rotate at a constant speed, forming a continuous circular trajectory between the support ring 32 and the annular boss 311. This ensures continuity and consistency in the welding process, avoids the arc start and arc end joint defects often associated with manual welding, and improves weld formation uniformity. Furthermore, the coordination of the welding equipment and turntable 8 allows the welding equipment to be aligned at an ideal angle within a narrow welding space from a fixed position, effectively avoiding interference between the equipment and the vessel's inner wall and ensuring precise wire feeding and positioning of the welding torch. This is particularly suitable for high-quality welding of thick-walled support rings 32. Furthermore, the mechanized rotation reduces manual intervention and operational errors, and the standardized welding process improves first-pass pass rates, ensuring that key indicators such as weld fusion rate and mechanical properties (such as strength and toughness) meet joint strength requirements. This ensures the long-term use of the support structure 3 and enhances the safety and reliability of the integrated reactor pressure vessel.

[0032] Alternatively, as Figure 1 and Figure 2 As shown, the welding equipment includes an operating machine 6 and a submerged arc welding carriage 5. The submerged arc welding carriage 5 is connected to the operating machine 6 through a connecting rod. The submerged arc welding carriage 5 is used to extend into the interior of the support section cylinder 31 to weld the annular boss 311 on the inner wall of the support ring 32 and the support ring 32.

[0033] In this optional embodiment, the welding equipment is composed of an operating machine 6 and a submerged arc welding carriage 5, which are connected by a connecting rod. This connection method allows the submerged arc welding carriage 5 to flexibly enter the interior of the support section cylinder 31, so that the annular boss 311 on the inner wall of the support ring 32 and the support ring 32 can be accurately welded. During the operation, the operating machine 6 plays a control and stabilizing role, providing stable support for the submerged arc welding carriage 5. The submerged arc welding carriage 5 relies on its own welding function, uses arc heat as a heat source, and uses continuously fed welding wire as filler metal to weld the weld between the annular boss 311 and the support ring 32. The wire is automatically fed as the weld rotates dynamically, thereby achieving stable and efficient welding of the annular boss 311 and the support ring 32, ensuring the uniformity and welding strength of the weld, and thus meeting the welding process requirements of the support structure 3.

[0034] Alternatively, as Figure 1 and Figure 2 The welding system further comprises a curved conductive nozzle 7 , which is arranged at the front end of the submerged arc welding carriage 5 , and is used to clamp the welding wire to weld the annular boss 311 on the inner wall of the support ring 32 and the support ring 32 .

[0035] In this optional embodiment, the curved conductive tip 7 is installed as an important component at the front end of the submerged arc welding carriage 5. Its special curved structural design allows it to flexibly adapt to the spatial environment of the inner wall of the cylinder after the submerged arc welding carriage 5 penetrates deep into the interior of the support section cylinder 31. By bending the conductive tip 7, it can accurately reach the welding position of the annular boss 311 on the inner wall of the cylinder of the support ring 32 and the support ring 32. During the welding operation, the curved conductive tip 7 firmly fixes the welding wire with its own clamping function, providing a guarantee for the stable feeding of the welding wire, and at the same time transmits the welding current to the welding wire, so that it generates arc heat under the action of the appropriate current. The arc heat melts the welding wire and the base material at the welding site, filling the area to be welded of the annular boss 311 and the support ring 32, completing the welding process. This effectively improves the accessibility and welding quality of the welding operation and ensures that the welding work can be carried out smoothly in the complex and narrow space inside the cylinder.

[0036] Alternatively, as Figure 1 and Figure 2 The welding process of the support ring 32 and the annular boss 311 on the inner wall of the support ring 32 cylinder by the welding equipment includes: The annular groove at the connection between the support ring 32 and the annular boss 311 is divided into a front annular groove a and a back annular groove; The submerged arc welding carriage 5 is controlled by the operating machine 6 to weld the front groove and the back groove respectively.

[0037] In this optional embodiment, to ensure the connection strength and welding quality between the support ring 32 and the annular boss 311, the annular groove of the weld at the connection between the two is finely divided into a front annular groove a and a back annular groove. The connection between the annular boss 311 and the support ring 32 can be pre-spot welded, or a small protrusion can be provided on the outer wall of the support ring 32 to temporarily fix the annular boss 311 to the support ring 32, thereby dividing the weld into the front annular groove a and the back annular groove through the fixed connection. During the actual welding operation, the submerged arc welding carriage 5 is controlled by the operating machine 6 to be fixed in the appropriate position. First, guide the submerged arc welding trolley 5 deep into the support section cylinder 31, align the curved conductive nozzle 7 with the front annular groove a, and then cooperate with the rotation of the turntable 8 to weld the front annular groove a. After the front welding is completed, the operating machine 6 controls the submerged arc welding trolley 5 to withdraw, flip the support structure 3 so that the back annular groove therein faces upward, facing the submerged arc welding trolley 5, and repeat the welding process for the front annular groove a to complete the welding of the back groove. By welding the front annular groove a and the back annular groove separately, welding defects can be effectively avoided, ensuring full penetration of the annular weld, and greatly improving the overall strength and reliability of the connection between the support ring 32 and the annular boss 311.

[0038] Alternatively, as Figure 1 and Figure 2 The annular groove at the connection between the support ring 32 and the annular boss 311 is divided into a front annular groove a and a back annular groove, including: Obtaining the groove depths of the annular grooves on both sides; The annular groove is divided into the front groove and the back groove according to the groove depth, wherein the groove depth of the front annular groove a is greater than the groove depth of the back annular groove a.

[0039] In this optional embodiment, during the welding preparation stage, the specific depth values ​​of the bilaterally symmetrical annular grooves are measured and, based on the process requirements and welding principles, the annular grooves are scientifically divided into the front annular groove a and the back annular groove according to the depth difference. To ensure sufficient filling and effective fusion during the welding process, the groove depth of the front annular groove a is set to be greater than the groove depth of the back annular groove. This division ensures that during welding, the deeper front groove is welded first, providing a solid foundation and sufficient filling for the weld; the subsequent welding of the back groove serves to supplement and improve the weld, eliminating possible welding defects, thereby achieving a high-quality annular weld connection and ensuring a stable connection between the support ring 32 and the annular boss 311.

[0040] Alternatively, as Figure 1 and Figure 2Said controlling the submerged arc welding carriage 5 to weld the front groove and the back groove respectively by the operating machine 6 includes: The support structure 3 is coaxially arranged above the turntable 8, wherein the front annular groove a faces the submerged arc welding carriage 5; The submerged arc welding carriage 5 is controlled by the operating machine 6 to cooperate with the turntable 8 to weld the front annular groove a; After the front annular groove a is welded, the support structure 3 is turned over so that the back annular groove faces the submerged arc welding carriage 5; The submerged arc welding carriage 5 is controlled by the operating machine 6 to cooperate with the turntable 8 to weld the back annular groove.

[0041] In this optional embodiment, before the welding operation, the support structure 3 needs to be precisely coaxially arranged above the turntable 8 to ensure that it is consistent with the central axis of the turntable 8, and at the same time, the front annular groove a is facing the submerged arc welding trolley 5, that is, the groove to be welded is facing the welding equipment, and is ready for the welding operation. When performing the welding operation, the operating machine 6 controls the submerged arc welding trolley 5 through the set welding process parameters to weld the dynamically rotating front annular groove a. When the front annular groove a is welded, the support structure 3 is flipped over to adjust the back annular groove that was originally facing away from the submerged arc welding trolley 5 to face the submerged arc welding trolley 5. Subsequently, the operating machine 6 once again controls the submerged arc welding trolley 5 to cooperate with the turntable 8, penetrates the support section cylinder 31 to perform precise welding on the back annular groove, and completes the remaining welding work, thereby achieving full-process and high-quality welding of the annular grooves of the support ring 32 and the annular boss 311.

[0042] Alternatively, as Figure 1 and Figure 2 Said operation of controlling the submerged arc welding carriage 5 and the turntable 8 by the operating machine 6 to weld the front annular groove a includes: Obtaining a preset first welding process parameter of the submerged arc welding carriage 5 and a first rotational speed of the turntable 8, wherein the first welding process parameter matches the first rotational speed of the turntable 8; The submerged arc welding carriage 5 is controlled according to the first welding process parameters to weld the front annular groove a driven to rotate by the turntable 8.

[0043] Optionally, the first welding process parameters include a first welding current, a first arc voltage, and a first heat input; and the first rotational speed satisfies: ; Among them, S1 is the first rotation speed, I1 is the first welding current, V1 is the first arc voltage, Q1 is the first heat input, and η1 is the first thermal efficiency parameter.

[0044] In this optional embodiment, the welding process parameters need to be set according to the actual welding requirements. The first welding process parameters preset for the submerged arc welding carriage 5 may include a first welding current, a first arc voltage, and the like, and simultaneously determine the first rotational speed of the turntable 8. The first welding process parameters form a strict matching relationship with the second rotational speed of the turntable 8, and the first rotational speed can be calculated from the first welding process parameters. The first welding current reflects the current intensity during welding and directly affects the heat generated by welding; the first arc voltage and current jointly determine the arc power; the first heat input represents the amount of heat input to the welding area during welding and is closely related to the weld quality; and the first thermal efficiency parameter reflects the effective utilization of heat. By calculating these parameters to obtain the first rotational speed, the first rotational speed can be precisely adapted to the first welding process parameters. This ensures that during welding, when the turntable 8 drives the support structure 3 to rotate at the first rotational speed, the submerged arc welding carriage 5 can perform precise welding operations according to the first welding process parameters. The two parameters work together to achieve ideal heat input, penetration depth, and weld width during the welding process, thereby ensuring the quality and efficiency of the annular groove welding and achieving a stable and reliable welding effect.

[0045] Optionally, controlling the submerged arc welding carriage 5 to cooperate with the turntable 8 through the operating machine 6 to weld the back annular groove includes: Obtaining preset second welding process parameters of the submerged arc welding carriage 5 and a second rotational speed of the turntable 8, wherein the second welding process parameters match the second rotational speed of the turntable 8; The submerged arc welding carriage 5 is controlled according to the second welding process parameters to weld the back annular groove driven to rotate by the turntable 8.

[0046] Optionally, the second welding process parameters include a second welding current, a second arc voltage, and a second heat input; and the second rotational speed satisfies: ; Among them, S2 is the second speed, I2 is the second welding current, V2 is the second arc voltage, Q2 is the second heat input, and η2 is the second thermal efficiency parameter.

[0047] In this optional embodiment, when performing back annular groove welding, similar to the front annular groove a welding, it is first necessary to obtain in advance the second welding process parameters preset by the submerged arc welding trolley 5 and the second rotational speed of the turntable 8. The second welding process parameters include key indicators such as the second welding current, the second arc voltage and the second heat input. These parameters and the second rotational speed of the turntable 8 have formed a highly matched relationship through debugging and verification. Among them, the second rotational speed of the turntable 8 is also determined by the second welding current, the second arc voltage, the second heat input and the second thermal efficiency parameter. The second welding current directly affects the intensity of heat generated during welding, the second arc voltage and the current work together to determine the arc power, the second heat input is related to the amount of heat absorbed by the welding area, and directly affects the weld formation and welding quality. The second thermal efficiency parameter reflects the effective utilization of heat in the welding process. By substituting these parameters into the formula to calculate the second rotational speed, when welding the back annular groove, the turntable 8 drives the support structure 3 to rotate at the second rotational speed, and the submerged arc welding trolley 5 performs welding operations according to the second welding process parameters. The two work closely together to accurately control the heat input, penetration depth and penetration width during the welding process, ensure the welding quality of the back annular groove, effectively avoid welding defects, achieve stable and reliable welding effects, and ensure the overall strength and reliability of the connection between the support ring 32 and the annular boss 311.

[0048] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A welding system for a support structure, characterized in that: It includes welding equipment and a turntable, wherein the welding equipment is arranged at a fixed position above the turntable, and the turntable is used to set a support structure and drive the support structure to rotate, wherein the support structure includes a support section cylinder and a support ring arranged inside the support section cylinder, and the support ring and the annular boss on the inner wall of the support ring cylinder are welded by the welding equipment.

2. The welding system for the support structure according to claim 1, characterized in that: The welding equipment includes an operating machine and a submerged arc welding trolley. The submerged arc welding trolley is connected to the operating machine through a connecting rod. The submerged arc welding trolley is used to extend into the interior of the support section cylinder to weld the annular boss on the inner wall of the support ring cylinder and the support ring.

3. The welding system for the support structure according to claim 2, characterized in that: It also includes a curved conductive nozzle, which is arranged at the front end of the submerged arc welding trolley and is used to clamp the welding wire to weld the annular boss on the inner wall of the support ring cylinder and the support ring.

4. The welding system for the support structure according to claim 3, characterized in that: The welding process of welding the support ring and the annular boss on the inner wall of the support ring cylinder by the welding equipment includes: Dividing the annular groove at the connection between the support ring and the annular boss into a front annular groove and a back annular groove; The submerged arc welding trolley is controlled by the operating machine to weld the front groove and the back groove respectively.

5. The welding system for the support structure according to claim 4, characterized in that: The annular groove at the connection between the support ring and the annular boss is divided into a front annular groove and a back annular groove, comprising: Obtaining the groove depths of the annular grooves on both sides; The annular groove is divided into the front groove and the back groove according to the groove depth, wherein the groove depth of the front annular groove is greater than the groove depth of the back annular groove.

6. The welding system for the support structure according to claim 4, characterized in that: The controlling the submerged arc welding carriage to weld the front groove and the back groove respectively by the operating machine includes: The support structure is coaxially arranged above the turntable, wherein the front annular groove faces the submerged arc welding carriage; The submerged arc welding carriage is controlled by the operating machine to cooperate with the turntable to weld the front annular groove; After the front annular groove welding is completed, the support structure is turned over so that the back annular groove faces the submerged arc welding trolley; The submerged arc welding carriage is controlled by the operating machine to cooperate with the turntable to weld the back annular groove.

7. The welding system for a support structure according to claim 4, characterized in that: The submerged arc welding trolley is controlled by the operating machine to cooperate with the turntable to weld the front annular groove, including: Acquire a preset first welding process parameter of the submerged arc welding carriage and a first rotational speed of the turntable, wherein the first welding process parameter matches the first rotational speed of the turntable; The submerged arc welding carriage is controlled according to the first welding process parameters to weld the front annular groove driven to rotate by the turntable.

8. The welding system for the support structure according to claim 7, characterized in that: The first welding process parameters include a first welding current, a first arc voltage, and a first heat input; and the first rotational speed satisfies: ； Among them, S1 is the first rotation speed, I1 is the first welding current, V1 is the first arc voltage, Q1 is the first heat input, and η1 is the first thermal efficiency parameter.

9. The welding system for a support structure according to claim 4, characterized in that: The submerged arc welding carriage is controlled by the operating machine to cooperate with the turntable to weld the back annular groove, including: Obtaining preset second welding process parameters of the submerged arc welding carriage and a second rotational speed of the turntable, wherein the second welding process parameters match the second rotational speed of the turntable; The submerged arc welding carriage is controlled according to the second welding process parameters to weld the back annular groove driven to rotate by the turntable.

10. The welding system for a support structure according to claim 9, characterized in that: The second welding process parameters include a second welding current, a second arc voltage, and a second heat input; and the second rotational speed satisfies: ； Among them, S2 is the second speed, I2 is the second welding current, V2 is the second arc voltage, Q2 is the second heat input, and η2 is the second thermal efficiency parameter.

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