Submerged arc welding device for wind power tower and welding method thereof

Abstract

The application belongs to the technical field of wind power tower processing equipment, and particularly relates to a submerged arc welding device for a wind power tower and a welding method thereof, wherein the submerged arc welding device for the wind power tower comprises a guide rail, a roller support assembly and a centering assembly, the first sliding seat and the second sliding seat are slidably connected to the guide rail; the roller support assembly comprises a first roller group and a second roller group, and is arranged on the first sliding seat and the second sliding seat respectively and used for supporting a cylinder; the centering assembly comprises a conical guide pin, a conical guide sleeve and a floating support, the floating support is used for enabling the second roller group to float up and down, the conical guide sleeve is matched with the conical guide pin, and when the first sliding seat and the second sliding seat are close to each other, the conical surface guides the second roller group to float up and down, so that the support height of the second roller group is precisely centered with the support height of the first roller group. The roller support assembly realizes self-weight centering in the width direction of the cylinder, and the centering assembly realizes automatic centering in the height direction, so as to facilitate subsequent submerged arc welding.

Description

Technical Field

[0001] This application belongs to the technical field of wind turbine tower processing equipment, and particularly relates to a submerged arc welding device and welding method for wind turbine towers. Background Technology

[0002] Wind turbine towers are typically constructed by connecting multiple tapered cylindrical sections through circumferential welding. Before circumferential welding, the two sections to be welded must be aligned along their axes to ensure that their end faces are fully in contact and their axes coincide, thus guaranteeing the quality of the weld.

[0003] In existing technologies, cylinder section assembly typically uses two sets of roller frames to support two cylinder sections respectively. Due to manufacturing errors in machining, the actual support heights of the two sets of roller frames are difficult to be completely consistent, requiring an adjustment mechanism for compensation. Existing solutions usually install hydraulic cylinders or lifting components at the bottom of the roller frames to achieve alignment through active adjustment. However, the adjustment process requires manual intervention or sensor detection, resulting in long assistance time and low efficiency.

[0004] The above method has the following shortcomings: First, it relies on repeated manual measurement and adjustment, which is time-consuming and inefficient; second, the centering accuracy depends on the operator's experience, making it difficult to guarantee stability and consistency. Summary of the Invention

[0005] This application provides a submerged arc welding device and welding method for wind turbine towers, aiming to solve to some extent the problem of how to achieve rapid and accurate centering of wind turbine towers to facilitate subsequent submerged arc welding.

[0006] In a first aspect, this application provides a submerged arc welding device for wind turbine towers, used for centering and welding multiple sections of the tower body. The device includes a guide rail, a roller support assembly, and a centering assembly. A first slide block and a second slide block are slidably connected to the guide rail, and both the first and second slide blocks can be locked and fixed to the guide rail. The roller support assembly includes a first roller group and a second roller group, respectively disposed on the first and second slide blocks, for supporting the tower body. The first and second roller groups have V-shaped support surfaces. The centering assembly includes a conical guide pin fixedly disposed on the first roller group, a conical guide sleeve disposed on the second roller group, and a floating support component. The floating support component allows the second roller group to float up and down. The conical guide sleeve cooperates with the conical guide pin, guiding and driving the second roller group to float up and down through the conical surface when the first and second slide blocks approach each other, so that the support height of the second roller group is precisely aligned with the support height of the first roller group.

[0007] Furthermore, the floating support includes a floating seat and an elastic reset member. The floating seat is floatingly mounted on the second slide via the elastic reset member, and the second roller assembly is disposed on the floating seat.

[0008] Furthermore, the second slide is provided with a guide sleeve, and the floating seat is provided with a guide plunger. The guide plunger is slidably disposed in the guide sleeve to constrain the vertical floating direction of the floating seat.

[0009] Furthermore, a locking mechanism is provided between the floating seat and the second slide, which is used to lock and fix the floating seat and the second slide after the fine alignment is completed.

[0010] Furthermore, both the first roller group and the second roller group include a support plate, an active roller and a driven roller rotatably connected to the support plate, and a driving component for driving the active roller to rotate. The active roller and the driven roller are arranged in a V-shape on both sides of the bottom of the cylinder, and the V-shaped support surface is formed by the roller surfaces of the active roller and the driven roller.

[0011] Furthermore, it also includes a lifting adjustment mechanism, which is located between the second slide and the second roller group, for adjusting the initial support height of the second roller group.

[0012] Furthermore, it also includes a welding mechanism for submerged arc welding of the circumferential seam between the two cylinder sections.

[0013] Furthermore, the welding mechanism includes a robotic arm and a welding torch mounted at the end of the robotic arm.

[0014] Secondly, this application provides a submerged arc welding method for wind turbine towers, which uses the aforementioned submerged arc welding equipment for wind turbine towers for welding, and includes the following steps: S100: The two cylindrical sections are placed on the first roller group and the second roller group respectively, and the width direction of the cylinder is automatically centered under the action of the V-shaped support surface; S200: Drives the first and second slide blocks to move towards each other along the guide rail; S300: The tapered guide pin and tapered guide sleeve cooperate to guide the second roller group to float up and down through the tapered surface, so that the support height of the second roller group is precisely aligned with the support height of the first roller group; S400: Lock the first and second slide blocks in place, move the welding mechanism to directly above the circumferential seam, and synchronously drive the cylinder to rotate at a constant speed around its own axis. The welding torch performs submerged arc welding on the circumferential seam.

[0015] Furthermore, before step S200, the method further includes: coarsely adjusting the support height of the second roller group through the lifting adjustment mechanism to reduce the center height difference between the two cylinder ends to a predetermined range.

[0016] The advantages of this application compared to the prior art are: In the submerged arc welding equipment for wind turbine towers disclosed in this application, during operation, two cylindrical sections to be welded are respectively hoisted onto the first roller group and the second roller group. The cylinder body automatically centers in the width direction under the action of the V-shaped support surface. Then, the first slide and the second slide are driven to move towards each other along the guide rail. The conical guide pin fixed on the first roller group enters the conical guide sleeve set on the second roller group. When there is a deviation in the support height of the two roller groups, the conical surface guides the radial component force to drive the second roller group to float up and down through the floating support until the conical guide pin is fully inserted into the conical guide sleeve. The support height of the second roller group is precisely aligned with the support height of the first roller group. Finally, the first slide and the second slide are locked and fixed, and the welding mechanism moves to directly above the circumferential seam for submerged arc welding.

[0017] This invention achieves self-weight centering in the width direction through a V-shaped support surface, and automatically aligns the floating support component in the height direction through the cooperation of a conical guide pin and a conical guide sleeve. Alignment in both directions is completed through a purely mechanical passive method, without the need for external power, sensors, or control systems. This completely avoids the problems of system complexity, high cost, low efficiency, and unstable accuracy caused by existing technologies that rely on repeated adjustments by hydraulic cylinders or manual visual inspection for alignment. At the same time, the precision of the alignment is guaranteed by the geometric accuracy of the conical surface machining, and is not affected by changes in usage time and environment. Furthermore, alignment and welding are completed in the same station, eliminating the need to transfer the cylinder body and significantly shortening auxiliary time. This enables rapid, accurate, and stable alignment of large wind turbine tower sections. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a submerged arc welding device for wind turbine towers provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the second roller assembly provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a floating support provided in an embodiment of this application; Figure 4 This is a flowchart of a submerged arc welding method for wind turbine towers provided in one embodiment of this application.

[0020] Figure label: 100. Guide rail; 101. First slide; 102. Second slide; 200. First roller group; 201. Second roller group; 202. Support plate; 203. Driving roller; 204. Driven roller; 205. Driving component; 300. Tapered guide pin; 301. Tapered guide sleeve; 302. Floating support; 303. Floating seat; 304. Elastic reset component; 305. Guide sleeve; 306. Guide plunger; 400. Locking mechanism; 500. Lifting and adjusting mechanism; 600. Welding mechanism; 601. Robotic arm; 602. Welding torch. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0023] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, "at least one of a, b, or c", or "at least one of a, b, and c", can both mean: a, b, c, a~b (i.e., a and b), a~c, b~c, or a~b~c, where a, b, and c can be single or multiple.

[0024] The terms "first" and "second" are used only to describe the purpose and to distinguish objects, such as substances, from one another, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. For example, without departing from the scope of the provisions of this application, "first XX" may also be referred to as "second XX," and similarly, "second XX" may also be referred to as "first XX." Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0025] The terminology used in the embodiments of this application is for the purpose of describing particular implementations only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the implementations of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should be understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution. Some or all steps may be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the implementation regulations of this application.

[0027] The weights of the relevant components mentioned in the embodiments of this application can refer not only to the specific content of each component, but also to the proportional relationship between the weights of the components. Therefore, any scaling up or down of the content of the relevant components according to the embodiments of this application is within the scope disclosed in the embodiments of this application. Specifically, the mass described in the embodiments of this application can be a mass unit known in the chemical industry, such as μg, mg, g, or kg.

[0028] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0029] Reference Figures 1 to 3 This application provides a submerged arc welding device for wind turbine towers, used for centering and welding multi-section cylinders. It includes a guide rail 100, a roller support assembly, and a centering assembly. A first slide block 101 and a second slide block 102 are slidably connected to the guide rail 100, and both the first slide block 101 and the second slide block 102 can be locked and fixed to the guide rail 100. The roller support assembly includes a first roller group 200 and a second roller group 201, respectively disposed on the first slide block 101 and the second slide block 102, for supporting the cylinder. The first roller group 200 and the second roller group 201 have… It has a V-shaped support surface; the centering component includes a tapered guide pin 300 fixedly mounted on the first roller group 200, a tapered guide sleeve 301 mounted on the second roller group 201, and a floating support member 302. The floating support member 302 is used to allow the second roller group 201 to float up and down. The tapered guide sleeve 301 cooperates with the tapered guide pin 300. When the first slide 101 and the second slide 102 approach each other, the tapered surface guides and drives the second roller group 201 to float up and down, so that the support height of the second roller group 201 is precisely aligned with the support height of the first roller group 200.

[0030] In this embodiment, the guide rail 100 is made of I-beams or heavy-duty linear guide rails, and is fixedly laid on the ground foundation of the welding station, extending longitudinally. The first slide block 101 and the second slide block 102 are slidably connected to the guide rail 100 by sliders or rollers, and can reciprocate along the guide rail 100. Each slide block is provided with a locking mechanism between itself and the guide rail 100, which is used to lock the slide block to the guide rail 100 after alignment. The first roller group 200 is fixedly installed on the first slide block 101 as a fixed reference side; the second roller group 201 is installed on the floating support 302 as a floating adjustment side. Both the first roller group 200 and the second roller group 201 include at least two rollers, which are arranged at an angle to each other to form a V-shaped support surface. The centering assembly includes a tapered guide pin 300, a tapered guide sleeve 301, and a floating support 302. The tapered guide pin 300 is fixedly installed on the support plate 202 or bracket of the first roller assembly 200, with its axis horizontal and its tip pointing towards the second slide 102. The tapered guide sleeve 301 is linked to the second roller assembly 201 and installed on the support plate 202 of the second roller assembly 201, with an inner hole that matches the tapered guide pin 300. The floating support 302 is disposed between the second slide 102 and the second roller assembly 201 to allow the second roller assembly 201 to float up and down. The sum of the effective guide length of the tapered guide pin 300 and the guide length of the tapered guide sleeve 301 is greater than the slide travel required for the two cylinder end faces to come together and fully fit, ensuring that the tapered pin and tapered sleeve are always in a mating state before the end faces are fully fitted, continuously providing high-level centering guidance. In other embodiments, the positions of the tapered guide pin 300 and the tapered guide sleeve 301 can be interchanged. That is, the tapered guide pin 300 is disposed on the second roller group 201, and the tapered guide sleeve 301 is disposed on the first roller group 200, which can also achieve the tapered surface guiding function. The floating support 302 can also be in the form of an air-floating seat or a magnetic levitation seat.

[0031] In practice, the operator hoists the two cylinder sections onto the first roller group 200 and the second roller group 201 respectively. Under the weight of the cylinder, the outer wall of the cylinder slides down along the V-shaped support surface to the bottom of the V-groove. Because the V-shaped support surface is symmetrical, the center of the cylinder automatically lies on the symmetrical plane, completing the centering in the width direction. Then, the first slide block 101 and the second slide block 102 are driven to move towards each other along the guide rail 100. When there is a gap of approximately 2-10mm between the end faces of the two cylinders, the conical surface of the tapered guide pin 300 begins to contact the conical surface of the tapered guide sleeve 301. If there is a deviation in the support height of the two roller groups, the conical surface contact generates a radial force, driving the floating support 302 to make the second roller group 201 float up or down until the tapered guide pin 300 is fully inserted into the tapered guide sleeve 301. Because the mating length between the tapered pin and the tapered sleeve is greater than the stroke required for end face contact, the end faces are not yet fully contacted at this point. Therefore, the second roller group 201 is not constrained by the end face contact force during the floating process and can float freely up and down. After high precision alignment is completed, continue to drive the slide blocks to move slightly closer together so that the end faces of the two cylinders are completely in contact. Finally, lock and fix the two slide blocks on the guide rail 100.

[0032] Specifically, the V-shaped support surface achieves self-weight centering in the width direction, and the tapered guide pin 300 and tapered guide sleeve 301 work together to drive the floating support 302 to achieve automatic precision centering in the height direction. The centering in both directions is completed in a purely mechanical passive manner, without the need for external power, sensors or control systems. This completely avoids the problems of system complexity, high cost, low efficiency and unstable accuracy caused by the reliance on repeated adjustment by hydraulic cylinders or manual visual inspection in existing technologies. At the same time, the precision centering accuracy is guaranteed by the geometric accuracy of the tapered surface machining, which is not affected by the usage time and environmental changes. Moreover, the centering and welding are completed in the same station, without the need to transfer the cylinder, which greatly shortens the auxiliary time and realizes the rapid, accurate and stable centering of large wind turbine tower sections.

[0033] Furthermore, the floating support 302 includes a floating seat 303 and an elastic reset member 304. The floating seat 303 is floatingly mounted on the second slide 102 via the elastic reset member 304, and the second roller group 201 is disposed on the floating seat 303.

[0034] In this embodiment, the floating support 302 specifically includes a floating seat 303 and an elastic reset member 304. The floating seat 303 is a plate-shaped or frame-type structure, formed by casting or welding, and made of structural steel. It has sufficient rigidity and strength to bear the weight of the cylinder section. Its upper surface is used to fix the second roller assembly 201, and its lower surface is connected to the second slide block 102 through the elastic reset member 304. The elastic reset members 304 are disposed between the floating seat 303 and the second slide block 102, and there are multiple elastic reset members 304 distributed in the four corner areas of the floating seat 303 to ensure that the floating seat 303 is subjected to uniform force. The elastic reset member 304 can be a helical compression spring or a disc spring. When a helical compression spring is used, the spring is sleeved on the outside of the guide plunger 306, with one end abutting against the lower surface of the floating seat 303 and the other end abutting against the upper surface of the second slide block 102, always applying an upward elastic force to the floating seat 303. The stiffness of the spring needs to be matched and designed according to the weight of the cylinder section and the required floating amount.

[0035] In operation, when the tapered guide pin 300 enters the tapered guide sleeve 301, if the height of the second roller group 201 is lower than that of the first roller group 200, the upward component force generated by the tapered guide pushes the floating seat 303 upward, compressing the spring; if the height of the second roller group 201 is higher than that of the first roller group 200, the downward component force generated by the tapered guide pushes the floating seat 303 downward, compressing the spring. The up-and-down movement of the floating seat 303 drives the second roller group 201 to move synchronously until the support height of the second roller group 201 is completely consistent with that of the first roller group 200. During this process, the spring always provides an elastic force opposite to the floating direction, playing a buffering and stabilizing role, preventing the floating seat 303 from jumping violently.

[0036] Furthermore, the second slide 102 is provided with a guide sleeve 305, and the floating seat 303 is provided with a guide plunger 306. The guide plunger 306 is slidably disposed in the guide sleeve 305 to constrain the up and down floating direction of the floating seat 303.

[0037] In this embodiment, to ensure that the floating seat 303 can only float vertically and not deviate horizontally, a guide structure is provided between the second slide 102 and the floating seat 303. Specifically, a guide sleeve 305 is fixedly installed on the second slide 102. The guide sleeve 305 has a cylindrical structure, and its inner hole is precision-machined to form a high-precision cylindrical surface. A guide plunger 306 is fixedly installed on the floating seat 303. The guide plunger 306 has a cylindrical structure, and its outer circle is precision-machined to form a precision sliding fit with the inner hole of the guide sleeve 305. The fit clearance is preferably 0.02mm to 0.05mm. There are two or four guide sleeves 305, evenly distributed in the four corner areas of the second slide 102, and the guide plungers 306 are arranged in a one-to-one correspondence with the guide sleeves 305.

[0038] In actual operation, when the tapered guide pin 300 drives the floating seat 303 to float up and down, the guide plunger 306 slides axially within the guide sleeve 305. Because the guide plunger 306 and the guide sleeve 305 have a precision sliding fit, the horizontal displacement of the floating seat 303 is completely constrained, retaining only the vertical degree of freedom. This ensures that the second roller assembly 201 will not experience horizontal displacement during floating, guaranteeing that the precise fit between the tapered guide pin 300 and the tapered guide sleeve 301 remains undisturbed.

[0039] Furthermore, a locking mechanism 400 is provided between the floating seat 303 and the second slide 102. The locking mechanism 400 is used to lock the floating seat 303 and the second slide 102 after the alignment is completed.

[0040] In this embodiment, the locking mechanism 400 can take various forms. In one embodiment, the locking mechanism 400 includes a locking cylinder and a locking ring. The locking ring is sleeved on the outer periphery of the guide plunger 306. The locking cylinder is fixed on the second slide 102, and its piston rod is connected to the locking ring. The locking cylinder drives the locking ring to radially grip the guide plunger 306, and uses friction to fix the guide plunger 306 in the guide sleeve 305. In another embodiment, the locking mechanism 400 includes a locking pin and a locking hole. The floating seat 303 is provided with a locking hole, and the second slide 102 is provided with a corresponding pin hole. After the fine alignment is completed, the locking pin passes through the pin hole and inserts into the locking hole to achieve mechanical locking.

[0041] Furthermore, both the first roller group 200 and the second roller group 201 include a support plate 202, an active roller 203 and a driven roller 204 rotatably connected to the support plate 202, and a driving member 205 for driving the active roller 203 to rotate. The active roller 203 and the driven roller 204 are arranged in a V-shape on both sides of the bottom of the cylinder, and the V-shaped support surface is formed by the roller surfaces of the active roller 203 and the driven roller 204.

[0042] In this embodiment, both the first roller group 200 and the second roller group 201 adopt the same structural design. Each roller group specifically includes a support plate 202, a driving roller 203, a driven roller 204, and a driving component 205. The support plate 202 is a flat structure made of thick steel plate, fixedly installed on the corresponding slide, and has two roller mounting seats on its upper surface. The two mounting seats are arranged at an angle of relative inclination, typically 30° to 60°. The driving roller 203 and the driven roller 204 are rotatably connected to the two mounting seats through bearing seats and rotating shafts, respectively. Both are cylindrical rollers with cylindrical or slightly curved outer surfaces. The two rollers are arranged at an angle of relative inclination, and their outer surfaces together form a V-shaped support surface. The driving component 205 is a motor, connected to the rotating shaft of the driving roller 203 through a reducer, used to drive the driving roller 203 to rotate. The rotation of the cylinder is driven by the friction between the roller surface and the outer wall of the cylinder. In other embodiments, the drive component 205 can also be a hydraulic motor, which features low speed and high torque, making it suitable for heavy-load starting conditions. The driven roller 204 is not connected to the drive component 205 and rotates passively with the rotation of the cylinder. To increase the friction between the roller and the cylinder, the outer surface of the roller can be covered with a layer of polyurethane or rubber material.

[0043] Furthermore, it also includes a lifting adjustment mechanism 500, which is disposed between the second slide 102 and the second roller group 201, for adjusting the initial support height of the second roller group 201.

[0044] In this embodiment, the lifting adjustment mechanism 500 is disposed between the second slide 102 and the second roller group 201, and is used to coarsely adjust the initial support height of the second roller group 201 before fine alignment. In one embodiment, the lifting adjustment mechanism 500 adopts a worm gear screw jack, including a worm gear box, a screw, and a handwheel. The worm gear box is fixedly installed on the floating seat 303. One end of the screw is connected to the support plate 202 of the second roller group 201, and the other end passes through the worm gear box and meshes with the worm gear. The operator rotates the handwheel to drive the worm gear to rotate, and the worm gear drives the screw to move up and down, thereby adjusting the support height of the second roller group 201. In another embodiment, the lifting adjustment mechanism 500 adopts a hydraulic cylinder. The cylinder body of the hydraulic cylinder is fixed on the floating seat 303, and the piston rod is connected to the support plate 202 of the second roller group 201. The extension length of the piston rod is controlled by a hydraulic control system to achieve height adjustment.

[0045] Furthermore, it also includes a welding mechanism 600 for submerged arc welding of the circumferential seam between the two cylinder sections.

[0046] In this embodiment, the welding mechanism 600 is disposed on the side of the guide rail 100 and is used to perform submerged arc welding on the circumferential seam after the two cylinder sections are aligned. The welding mechanism 600 can be a multi-joint industrial robot or a gantry-type three-axis manipulator 601. The robot base is fixed on the foundation on the side of the guide rail 100, and a welding torch 602 holder is installed at the end of the manipulator 601, with the welding torch 602 fixed in the holder.

[0047] Furthermore, the welding mechanism 600 includes a robotic arm 601 and a welding torch 602 disposed at the end of the robotic arm 601.

[0048] In this embodiment, the welding mechanism 600 specifically includes a robotic arm 601 and a welding torch 602 disposed at the end of the robotic arm 601. The robotic arm 601 is a multi-joint industrial robot with multiple rotary joints, enabling it to move freely and adjust its posture in space. Its end is equipped with a gripper for the welding torch 602, which is fixed to the end of the robotic arm 601. The control system of the robotic arm 601 is linked to the submerged arc welding machine and can adjust the position and posture of the welding torch 602 in real time according to welding process requirements. In other embodiments, the robotic arm 601 can also be a gantry-type robotic arm 601, including three linear motion axes: X-axis, Y-axis, and Z-axis. The welding torch 602 is mounted at the end of the Z-axis, which also enables spatial positioning of the welding torch 602.

[0049] Reference Figure 4 This application provides a submerged arc welding method for wind turbine towers, which uses the aforementioned submerged arc welding equipment for wind turbine towers and includes the following steps: S100: The two cylindrical sections are placed on the first roller group 200 and the second roller group 201 respectively, and the width direction of the cylinder is automatically centered under the action of the V-shaped support surface. S200: Drive the first slide block 101 and the second slide block 102 to move towards each other along the guide rail 100; S300: The tapered guide pin 300 cooperates with the tapered guide sleeve 301 to guide and drive the second roller group 201 to float up and down through the tapered surface, so that the support height of the second roller group 201 is precisely aligned with the support height of the first roller group 200. S400: Lock and fix the first slide block 101 and the second slide block 102, move the welding mechanism 600 directly above the circumferential seam, and drive the cylinder to rotate at a constant speed around its own axis synchronously. The welding gun 602 performs submerged arc welding on the circumferential seam.

[0050] In this embodiment, S100 is the cylinder hoisting and width centering step, S200 is the slide block approaching step, S300 is the conical surface fine alignment step, and S400 is the welding step. S100 to S300 are the alignment stages, and S400 is the welding stage. The method is executed by a combination of operators and equipment. The operators are responsible for hoisting the cylinder and starting the equipment, which automatically performs the alignment and welding processes after startup. In other embodiments, S200 and S300 can be partially overlapped, meaning that the conical guide pin 300 begins to enter the conical guide sleeve 301 at the end of the slide block approaching stage, and the conical surface guiding effect begins to take effect at the end of the slide block approaching stage. This also falls within the scope of the present invention.

[0051] In the specific operation, S100 is executed first: the two cylindrical sections to be welded are hoisted onto the first roller group 200 and the second roller group 201 respectively by a crane. Under the action of the cylinder's own weight, the outer wall of the cylinder slides down along the V-shaped support surface to the bottom of the V-shaped groove, completing the automatic centering in the width direction. Then, S200 is executed: the drive device is activated to drive the first slide block 101 and the second slide block 102 to move towards each other along the guide rail 100, so that the end faces of the two cylinders are close to the predetermined distance, at which time there is a gap of about 2~10mm between the end faces. Next, S300 is executed: as the slide blocks continue to move closer, the conical surface of the conical guide pin 300 begins to contact the conical surface of the conical guide sleeve 301. If there is a deviation in the support height of the two roller groups, the radial component force generated by the conical surface contact drives the floating support 302 to make the second roller group 201 float up and down until the conical guide pin 300 is completely inserted into the conical guide sleeve 301, completing the fine alignment in the height direction. At this time, the end faces of the two cylinders are not yet completely attached. Finally, execute S400: Continue to drive the slide blocks to move slightly closer so that the two cylinder end faces are completely in contact, lock and fix the first slide block 101 and the second slide block 102 on the guide rail 100, the welding mechanism 600 moves the welding gun 602 directly above the circumferential seam, the first roller group 201 and the second roller group 201 synchronously drive the cylinder to rotate at a constant speed around its own axis, and at the same time start the submerged arc welding machine to perform welding. The welding is completed after the cylinder rotates one full revolution.

[0052] Furthermore, before step S200, the following steps are included: coarsely adjusting the support height of the second roller group 201 through the lifting adjustment mechanism 500, so that the center height difference between the two cylindrical sections is reduced to a predetermined range.

[0053] In this embodiment, the additional step is performed after the two cylindrical sections are placed on the roller assembly and before the drive slide comes together. The lifting adjustment mechanism 500 is located between the second slide 102 and the second roller assembly 201. Its coarse adjustment can be performed manually by the operator or automatically by the control system. In manual operation, the operator adjusts the lifting adjustment mechanism 500 by rotating the handwheel by observing the center height difference between the ends of the two cylindrical sections. In automatic operation, the height difference is detected by a displacement sensor, and the control system automatically drives the motor or hydraulic valve of the lifting adjustment mechanism 500 for adjustment. The predetermined range of coarse adjustment is related to the floating amount of the tapered guide sleeve 301, typically set to ±5mm to ±10mm. That is, after coarse adjustment, the center height difference between the ends of the two cylindrical sections does not exceed the maximum floating amount of the tapered guide sleeve 301, ensuring that the tapered guide pin 300 can smoothly enter the tapered guide sleeve 301 without jamming.

[0054] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0055] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A submerged arc welding device for wind turbine towers, used for centering and welding multiple cylindrical sections, characterized in that, include: A guide rail (100) is provided, on which a first slide block (101) and a second slide block (102) are slidably connected. Both the first slide block (101) and the second slide block (102) can be locked and fixed on the guide rail (100). The roller support assembly includes a first roller group (200) and a second roller group (201), which are respectively disposed on the first slide (101) and the second slide (102) for supporting the cylinder. The first roller group (200) and the second roller group (201) have V-shaped support surfaces. The centering component includes a tapered guide pin (300) fixedly mounted on the first roller group (200), a tapered guide sleeve (301) mounted on the second roller group (201), and a floating support (302). The floating support (302) is used to allow the second roller group (201) to float up and down. The tapered guide sleeve (301) cooperates with the tapered guide pin (300) to guide and drive the second roller group (201) to float up and down through the tapered surface when the first slide (101) and the second slide (102) come together, so that the support height of the second roller group (201) is precisely aligned with the support height of the first roller group (200).

2. The submerged arc welding equipment for wind turbine towers as described in claim 1, characterized in that, The floating support (302) includes a floating seat (303) and an elastic reset member (304). The floating seat (303) is floatingly mounted on the second slide (102) via the elastic reset member (304), and the second roller group (201) is disposed on the floating seat (303).

3. The submerged arc welding equipment for wind turbine towers as described in claim 2, characterized in that, The second slide (102) is provided with a guide sleeve (305), and the floating seat (303) is provided with a guide plunger (306). The guide plunger (306) is slidably disposed in the guide sleeve (305) to constrain the up and down floating direction of the floating seat (303).

4. The submerged arc welding equipment for wind turbine towers as described in claim 2, characterized in that, A locking mechanism (400) is provided between the floating seat (303) and the second slide (102). The locking mechanism (400) is used to lock the floating seat (303) and the second slide (102) after the alignment is completed.

5. The submerged arc welding equipment for wind turbine towers as described in claim 1, characterized in that, Both the first roller group (200) and the second roller group (201) include a support plate (202), an active roller (203) and a driven roller (204) rotatably connected to the support plate (202), and a driving member (205) for driving the active roller (203) to rotate. The active roller (203) and the driven roller (204) are arranged in a V-shape on both sides of the bottom of the cylinder. The V-shaped support surface is formed by the roller surfaces of the active roller (203) and the driven roller (204).

6. The submerged arc welding equipment for wind turbine towers as described in claim 1, characterized in that, It also includes a lifting adjustment mechanism (500), which is disposed between the second slide (102) and the second roller group (201) for adjusting the initial support height of the second roller group (201).

7. The submerged arc welding equipment for wind turbine towers as described in claim 1, characterized in that, It also includes a welding mechanism (600) for submerged arc welding of the circumferential seam between the two cylinder sections.

8. The submerged arc welding equipment for wind turbine towers as described in claim 7, characterized in that, The welding mechanism (600) includes a robotic arm (601) and a welding torch (602) disposed at the end of the robotic arm (601).

9. A submerged arc welding method for wind turbine towers, comprising welding using the submerged arc welding equipment for wind turbine towers as described in any one of claims 1-8, characterized in that, Includes the following steps: S100: Place the two cylindrical sections on the first roller group (200) and the second roller group (201) respectively, and the cylinder will automatically center in the width direction under the action of the V-shaped support surface; S200: Drive the first slide (101) and the second slide (102) to move towards each other along the guide rail (100); S300: The tapered guide pin (300) cooperates with the tapered guide sleeve (301) to guide and drive the second roller group (201) to float up and down through the tapered surface, so that the support height of the second roller group (201) is precisely aligned with the support height of the first roller group (200); S400: Lock and fix the first slide (101) and the second slide (102), move the welding mechanism (600) to the top of the circumferential seam, and drive the cylinder to rotate at a constant speed around its own axis synchronously. The welding gun (602) performs submerged arc welding on the circumferential seam.

10. The submerged arc welding method for wind turbine towers as described in claim 9, characterized in that, Before step S200, the method further includes: coarsely adjusting the support height of the second roller group (201) by means of the lifting adjustment mechanism (500) to reduce the center height difference between the two cylindrical sections to a predetermined range.

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