Automatic centering device for double-sided submerged arc welding of large-diameter straight-seam welded pipes

Abstract

The utility model relates to the field of double submerged arc welding of welded pipe, disclose a kind of automatic centering device of double submerged arc welding of large-diameter straight seam welded pipe, including device shell, the hydraulic telescopic link is fixedly connected in the device shell outer wall back, the centering cutter is fixedly connected in the hydraulic telescopic link bottom, the fixed plate is fixedly connected in the device shell inner wall, the second motor is fixedly connected in fixed plate outer wall, the transmission gear is fixedly connected in the second motor top, the roller support seat is fixedly connected in the device shell bottom inner wall, the present application is rotated by first motor, drives main shaft gear rotation, main shaft gear can be rolled with rack movement, since two racks are fixed on two clamps respectively, can make two clamps along guide rail left and right synchronous movement, then by two sides first hydraulic rod lifting, so as to realize the clamping welding pipe of different size.

Description

Technical Field

[0001] This utility model relates to the field of double-sided submerged arc welding of welded pipes, and in particular to an automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes. Background Technology

[0002] The automatic alignment device for straight seam welded pipes is an automated equipment applied to the straight seam welded pipe production line. It adjusts the spatial position of key parts such as the edge of the steel plate to be welded and the opening of the pipe blank in real time to ensure that they are always at the preset reference center during the welding process, thereby ensuring the precise alignment of the welded joint and improving the welding quality and production stability.

[0003] In existing straight seam welded pipe production lines, the weld seams need to be corrected to facilitate subsequent welding.

[0004] An existing automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes typically requires a crane and manual labor to slowly align the weld seam with the centering device. Once clamped and fixed, the welded pipe cannot be rotated, resulting in low weld seam centering accuracy. Furthermore, different welded pipes often have different weld seam dimensions and weld seam heights from the pipe's center, which some fixed centering devices cannot adjust, thus making processing impossible. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides an automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes, which aims to improve the problem that the welded pipe cannot be rotated during the clamping process of the existing technology.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes, comprising a device housing, a hydraulic telescopic rod fixedly connected to the back of the outer wall of the device housing, a centering knife fixedly connected to the bottom of the hydraulic telescopic rod, a fixing plate fixedly connected to the inner wall of the device housing, a second motor fixedly connected to the outer wall of the fixing plate, a transmission gear fixedly connected to the top of the second motor, a roller support seat fixedly connected to the bottom inner wall of the device housing, a roller rotatably connected to the inner wall of the roller support seat, the top of the roller contacting the roller, a roller tooth groove opened in the middle section of the roller, and a transmission gear and an auxiliary gear meshing on the outer wall of the roller tooth groove.

[0007] As a further description of the above technical solution:

[0008] The outer walls of both sides of the device housing are fixedly connected to a first hydraulic rod. A connecting block is fixedly connected to the top of the first hydraulic rod. A guide rail is fixedly connected to the inner wall of the connecting block. A guide rail buckle is slidably connected to the bottom of the guide rail. A clamping plate is fixedly connected to the bottom of the guide rail buckle. A V-shaped clamp is fixedly connected to the bottom outer wall of the clamping plate. A rack is fixedly connected to the top of the clamping plate. A main shaft gear meshes with the outer wall of the rack's tooth groove. A first motor is fixedly connected to the top of the device housing. A second hydraulic rod is fixedly connected to the bottom of the first motor. The bottom of the second hydraulic rod is fixedly connected to the top of the main shaft gear.

[0009] As a further description of the above technical solution:

[0010] A folding arm is fixedly connected to the inner wall of the front of the device housing, and a spring is elastically connected to the inner wall of the folding arm. A guide wheel is rotatably connected to one end of the folding arm.

[0011] As a further description of the above technical solution:

[0012] The V-shaped clamp has six sets of rollers rotatably connected to the inner wall of the V-shaped groove, which are arranged in a rectangular shape and fixedly connected to the bottom of the two sets of clamping plates.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the device housing is provided with several sets of sliding grooves, and the inner wall of the sliding grooves is slidably connected with guide rails.

[0015] As a further description of the above technical solution:

[0016] The inner wall of the roller support is rotatably connected to a roller, and the top of the roller contacts the drum.

[0017] As a further description of the above technical solution:

[0018] A support block is fixedly connected to the bottom of the guide rail, and a main shaft gear is rotatably connected to the top of the support block.

[0019] As a further description of the above technical solution:

[0020] There are two sets of racks, arranged opposite each other, and fixedly connected to the top of the two sets of clamps respectively.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipe is configured with guide wheels, rollers, clamping rollers, a second motor, transmission gears, and a centering blade. When the welded pipe passes the guide wheels and its bottom contacts the rollers, the second motor drives the transmission gears to rotate. The gears mesh with the roller teeth on the rollers, causing the rollers to rotate. Because the welded pipes are in contact with the rollers, and the clamping rollers are also in contact with the welded pipes, the welded pipes can perform circular motion. When the weld seam is perpendicular to the centering blade directly below it, the centering blade is lowered, and its inverted triangular structure can finely adjust the weld seam angle.

[0023] 2. In this utility model, the automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipe is equipped with a first hydraulic rod, a main shaft gear, a rack, a first motor, a guide rail, and clamping plates. When centering the weld seam of the welded pipe, the first hydraulic rod lifts the guide rail, which drives the clamping plates to adjust the clamping height up and down. When the first motor rotates, it drives the main shaft gear through the second hydraulic rod. The main shaft gear rotates, and the two racks, which are fixed on the clamping plates, push the two clamping plates to move left and right relative to each other, thereby adjusting the clamping height according to the required welded pipe size. Attached Figure Description

[0024] Figure 1 This is a frontal three-dimensional structural diagram of an automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes proposed in this utility model.

[0025] Figure 2 This is a three-dimensional structural diagram of a V-shaped clamp for an automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes proposed in this utility model.

[0026] Figure 3 This is a three-dimensional structural diagram of the back centering knife of an automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes proposed in this utility model.

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the roller for an automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes proposed in this utility model.

[0028] Figure 5 This is a three-dimensional structural diagram of the overall side view of an automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes proposed in this utility model.

[0029] Figure 6 This is a three-dimensional structural diagram of the guide wheel of an automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes proposed in this utility model.

[0030] Legend:

[0031] 1. Device housing; 2. First electric motor; 3. Roller; 4. Second hydraulic rod; 5. Centering knife; 6. Hydraulic telescopic rod; 7. First hydraulic rod; 8. Connecting block; 9. Slide groove; 10. Roller support seat; 11. Roller; 12. Second electric motor; 13. Transmission gear; 14. Auxiliary gear; 15. V-clamp; 16. Guide rail; 17. Rack; 18. Main shaft gear; 19. Guide rail buckle; 20. Clamping plate; 21. Roller tooth groove; 22. Guide wheel; 23. Spring; 24. Fixing plate; 25. Folding arm; 26. Clamping roller; 27. Support block. Detailed Implementation

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

[0033] Reference Figures 1-6 An automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes is disclosed. The device includes a housing 1. A hydraulic telescopic rod 6 is fixedly connected to the back of the outer wall of the housing 1. A centering knife 5 is fixedly connected to the bottom of the hydraulic telescopic rod 6. The hydraulic telescopic rod 6 is driven by hydraulic power and can drive the centering knife 5 to apply downward pressure. Through the inclined surface design of the centering knife 5, the weld seam is squeezed, thereby achieving the feature of fine adjustment of weld seam centering. A folding arm 25 is fixedly connected to the inner wall of the front of the housing 1. A spring 23 is elastically connected to the inner wall of the folding arm 25. A guide wheel 22 is rotatably connected to one end of the folding arm 25. When the welded pipe enters the device, the folding arm 25 is squeezed, and the guide wheel 22 is tightly pressed against the surface of the welded pipe. The spring 23 can buffer the squeezing force and also reset the guide wheel 22. The guide wheel 22 guides the welded pipe to avoid shaking. A fixing plate 24 is fixedly connected to the inner wall of the device housing 1. A second motor 12 is fixedly connected to the outer wall of the fixing plate 24. A transmission gear 13 is fixedly connected to the top of the second motor 12. A roller support seat 10 is fixedly connected to the inner wall of the bottom of the device housing 1. A roller 11 is rotatably connected to the inner wall of the roller support seat 10. The top of the roller 11 contacts the roller 3, providing support for the roller 3 as a whole and reducing friction. A roller tooth groove 21 is opened in the middle section of the roller 3. The outer wall of the roller tooth groove 21 meshes with the transmission gear 13 and the auxiliary gear 14. When the second motor 12 rotates, it drives the transmission gear 13. The transmission gear 13 meshes with the roller tooth groove 21, thereby driving the roller 3 to rotate on the top of the roller 11. The auxiliary gear 14 rotates together with the roller 3 and plays a fixing role for the roller 3.

[0034] Reference Figures 1-5This utility model provides an embodiment of an automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes. The outer walls of the device housing 1 are fixedly connected to two first hydraulic rods 7, which can control the height of the entire clamping device. A connecting block 8 is fixedly connected to the top of the first hydraulic rod 7. A guide rail 16 is fixedly connected to the inner wall of the connecting block 8. The connecting block 8 provides fixation for the two guide rails 16 and also provides a force point for the first hydraulic rod 7, enabling simultaneous lifting of the guide rails 16. Several sets of sliding grooves 9 are provided on the outer wall of the device housing 1. The inner wall of the sliding grooves 9 is slidably connected to the guide rails 16, restricting the shaking of the guide rails 16 and limiting the sliding direction of the guide rails 16. A guide rail buckle 19 is slidably connected to the bottom of the guide rails 16. The guide rail buckle 19 is in close contact with the guide rails 16 through its own groove, thereby ensuring that the clamping plate 20 and the V-shaped clamp 15 remain upright and do not shake during movement.

[0035] Reference Figures 1-5 The bottom of the guide rail buckle 19 is fixedly connected to a clamping plate 20. The bottom outer wall of the clamping plate 20 is fixedly connected to a V-shaped clamp 15. The V-shaped clamp 15 can clamp a variety of large-diameter welded pipes of different sizes. The inner wall of the V-groove of the V-shaped clamp 15 is rotatably connected to clamping rollers 26. There are six sets in total, which are fixedly connected to the bottom of two sets of clamping plates 20 in a rectangular distribution. The clamping rollers 26 assist the V-shaped clamp 15 in clamping the welded pipe, but can reduce the friction with the welded pipe, so that the welded pipe can rotate smoothly without damaging the surface of the welded pipe if it needs to rotate. The top of the clamping plate 20 is fixedly connected to a rack 17. The outer wall of the rack 17's tooth groove is meshed with a main shaft gear 18. The bottom of the guide rail 16 is fixedly connected to a support block 27. The support block 27 provides support for the main shaft gear 18 and prevents it from falling. The top of the device housing 1 is fixedly connected to a first motor 2, and the bottom of the first motor 2 is fixedly connected to a second hydraulic rod 4. The second hydraulic rod 4 can be raised and retracted in coordination with the first hydraulic rod 7. The bottom of the second hydraulic rod 4 is fixedly connected to the top of the main shaft gear 18. The main shaft gear 18 can drive two racks 17 to move simultaneously, thereby driving two clamping plates 20 to move simultaneously in different directions. The distance between the two clamping plates 20 can be adjusted according to the size of the welded pipe to be clamped.

[0036] Working principle: The end of the folding arm 25 on the front of the device housing 1 is equipped with a guide wheel 22. The spring 23 inside the folding arm 25 provides elastic pressure. During the conveying of the welded pipe, the guide wheel 22 deflects to both sides of the welded pipe to initially correct its position. When the welded pipe is fully pushed into the device, the first motor 2 drives the main shaft gear 18 to mesh with the rack 17 to move laterally. The bottom of the two racks 17 is fixedly connected to the clamping plates 20. The first hydraulic rod 7 automatically adjusts the height of the lifting guide rail 16 and the clamping plate 20 according to the size of the welded pipe to be clamped, ensuring that the apex of the V-shaped clamp 15 at the bottom of the clamping plate 20 always points to the center of the welded pipe. The clamping roller 26 inside can reduce the friction between the clamping plate and the welded pipe. Therefore, when the two sets of V-shaped clamps 15 clamp inward, the welded pipe will be automatically pushed to the central axis to complete the radial alignment.

[0037] Then, the transmission gear 13 is driven to rotate by the second motor 12. The transmission gear 13 meshes with the roller tooth groove 21 in the middle section of the roller 3. At the same time, the auxiliary gear 14 meshes to enhance the transmission stability, driving the roller 3 to rotate on the bottom roller 11. There is friction between the roller 3 and the welded pipe, so the welded pipe will also rotate around the center between the roller 3 and the clamp roller 26, thereby initially adjusting the position of the weld.

[0038] Then, the hydraulic telescopic rod 6 is controlled to extend downwards to center the blade 5 and insert it into the weld. Through its own inclined surface design, it can generate sliding friction with the inclined surface of the weld. Since the weld pipe can rotate, it can be finely adjusted by extrusion. After the weld is finely adjusted, the centering blade 5 is slowly raised to wait for the welding operation.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A device for automatic centering of a large diameter straight seam pipe during double submerged arc welding, comprising a device housing (1), characterized in that: A hydraulic telescopic rod (6) is fixedly connected to the back of the outer wall of the device housing (1). A centering knife (5) is fixedly connected to the bottom of the hydraulic telescopic rod (6). A fixing plate (24) is fixedly connected to the inner wall of the device housing (1). A second motor (12) is fixedly connected to the outer wall of the fixing plate (24). A transmission gear (13) is fixedly connected to the top of the second motor (12). A roller support seat (10) is fixedly connected to the bottom inner wall of the device housing (1). A roller (11) is rotatably connected to the inner wall of the roller support seat (10). The top of the roller (11) contacts the roller (3). A roller tooth groove (21) is opened in the middle section of the roller (3). The transmission gear (13) and the auxiliary gear (14) mesh on the outer wall of the roller tooth groove (21).

2. A device for automatic alignment of double submerged arc welding of large diameter straight-seam welded pipes according to claim 1, characterized in that The device housing (1) has a first hydraulic rod (7) fixedly connected to the outer walls on both sides. A connecting block (8) is fixedly connected to the top of the first hydraulic rod (7). A guide rail (16) is fixedly connected to the inner wall of the connecting block (8). A guide rail buckle (19) is slidably connected to the bottom of the guide rail (16). A clamping plate (20) is fixedly connected to the bottom of the guide rail buckle (19). A V-shaped clamp (15) is fixedly connected to the bottom outer wall of the clamping plate (20). A rack (17) is fixedly connected to the top of the clamping plate (20). A main shaft gear (18) meshes with the outer wall of the tooth groove of the rack (17). A first motor (2) is fixedly connected to the top of the device housing (1). A second hydraulic rod (4) is fixedly connected to the bottom of the first motor (2). The bottom of the second hydraulic rod (4) is fixedly connected to the top of the main shaft gear (18).

3. A device for automatic alignment of double submerged arc welding of large diameter straight seam welded pipes as claimed in claim 1, wherein: A folding arm (25) is fixedly connected to the inner wall of the front of the device housing (1). A spring (23) is elastically connected to the inner wall of the folding arm (25). A guide wheel (22) is rotatably connected to one end of the folding arm (25).

4. A device for automatic alignment of double submerged arc welding of large diameter straight seam welded pipes as claimed in claim 2, wherein: The V-shaped clamp (15) has a V-shaped groove inner wall that is rotatably connected to the clamp roller (26). There are six sets in total, which are arranged in a rectangular shape and fixedly connected to the bottom of the two sets of clamping plates (20).

5. A device for automatic alignment of double submerged arc welding of large diameter straight seam welded pipes as claimed in claim 2, wherein: The outer wall of the device housing (1) is provided with several sets of sliding grooves (9), and the outer walls of both ends of the guide rail (16) are slidably connected to the sliding grooves (9).

6. A device for automatic alignment of double submerged arc welding of large diameter straight seam welded pipes as claimed in claim 1, wherein: The centering knife (5) is in the shape of an inverted triangle.

7. The automatic centering device for double-sided submerged arc welding of large-diameter straight seam welded pipes according to claim 2, characterized in that: The bottom of the guide rail (16) is fixedly connected to a support block (27), and the top of the support block (27) is rotatably connected to the main shaft gear (18).

8. A device for automatic alignment of double submerged arc welding of large diameter straight seam welded pipes as claimed in claim 2, wherein: There are two sets of racks (17), arranged opposite to each other, and fixedly connected to the top of the two sets of clamps (20).

Images