A stainless steel pipe welding device

Abstract

The present invention discloses a stainless steel pipe welding device, which relates to the technical field of steel pipe processing equipment and includes a conveying roller seat capable of transferring two pipes. It also includes a bilateral positioning frame arranged outside the pipes. A positioning welding unit capable of performing welding operations on different points at the interface is provided inside the bilateral positioning frame, and a rotatable bilateral limiting unit is provided on the bilateral positioning frame. When the positioning welding unit performs welding operations on different points at the interface end of the pipes, both pipes are located inside the bilateral positioning unit. By performing positioning welding operations at the pipe joints, the present invention can test the welding temperature and the operating mode of the welding machine until the quality of the positioning welding meets the ideal effect, so as to confirm the welding mode that is most suitable for stainless steel pipes. During the subsequent continuous welding operation, the trial-and-error cost during pipe welding is reduced, the welding quality is improved, and at the same time, the working efficiency of pipe welding is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe processing equipment, and particularly to a stainless steel pipe welding device. Background Art

[0002] The welding of stainless steel pipes is a common welding technique, which is widely used in fields such as construction, machinery, petrochemical industry, etc. Before welding, it is first necessary to prepare the welding surfaces of the stainless steel pipes. This includes removing impurities such as oil stains and oxide skins on the welding surfaces to ensure the quality of the welds. At the same time, the welding surfaces also need to be beveled to improve the strength of the welds.

[0003] Most of the existing welding devices for stainless steel pipes position the pipes through jigs, and then operate the robotic arm. The robotic arm carries a welding machine to perform welding operations on the pipes. However, when performing welding operations on large-diameter pipes, due to the certain wall thickness of the pipes and the large volume of the pipes, during the process of performing welding operations on their interfaces, the welding path of the pipes is relatively long. Therefore, if the welding temperature and the operating mode of the welding torch are not properly selected, the quality of the welds formed during the welding process is also likely to be affected. When the robotic arm carries a welding machine to weld the pipeline, once a weld with a certain length is formed, if the weld quality does not meet the requirements, it is not convenient to make adjustments, and the welding quality is likely to be affected. Therefore, this application provides a stainless steel pipe welding device to meet the requirements. Summary of the Invention

[0004] In view of the above problems, this application provides a stainless steel pipe welding device.

[0005] To achieve the above object, this application provides the following technical solution: A stainless steel pipe welding device includes a conveying roller base capable of transferring two pipes, and also includes a bilateral positioning frame arranged outside the pipes. A positioning welding unit capable of performing welding operations on different points at the interface is arranged inside the bilateral positioning frame, and a rotatable bilateral limiting unit is arranged on the bilateral positioning frame. When the positioning welding unit performs welding operations on different points at the interface end of the pipes, both pipes are located inside the bilateral positioning unit.

[0006] It also includes a unilateral positioning frame arranged on one side of the bilateral positioning frame. A continuous welding unit capable of performing continuous welding operations on the interface end is arranged in the relative space between the bilateral positioning frame and the unilateral positioning frame. A unilateral positioning unit capable of moving synchronously with the bilateral limiting unit is also arranged on the unilateral positioning frame. When the welding port positions of the two pipes move inside the continuous welding unit, the two pipes are respectively located inside the unilateral positioning unit and the bilateral positioning unit.

[0007] Further, the positioning welding unit includes a plurality of arc-shaped arms evenly distributed along an annular track, a plurality of extension frames connecting the heads and tails of adjacent arc-shaped arms, and a first welding machine disposed on the extension frames. The arc-shaped arms and the extension frames are located inside the bilateral positioning frame to form a closed annular structure, and a plurality of first welding machines are evenly distributed outside the pipeline.

[0008] A plurality of arc-shaped guide frames are provided inside the bilateral positioning frame, and arc-shaped channels through which the arc-shaped guide frames can pass are formed on the arc-shaped arms.

[0009] Further, a rotating rack is provided on one of the plurality of arc-shaped arms, and an electric gear disk I meshing with the rotating rack is provided outside the bilateral positioning frame. As the electric gear disk I rotates, the rotating rack, the extension frame, the arc-shaped arms, and the first welding machine all move along the outer surface of the pipeline.

[0010] Further, the bilateral positioning unit includes a first limiting gear ring disposed on the bilateral positioning frame, a plurality of groups of first guiding racks disposed on the inner surface of the first limiting gear ring, and a first linkage gear meshing with the first guiding racks. A plurality of bilateral follower shafts evenly distributed along an annular track are provided inside the bilateral positioning frame, and the first linkage gears are all disposed at the ends of the bilateral follower shafts.

[0011] Bilateral limiting columns capable of rotating synchronously with the bilateral follower shafts are provided on the bilateral follower shafts. Depressions for accommodating the exposed butt joints of the pipelines are formed on the bilateral limiting columns. The arc-shaped arms are located inside the depressions. When the first linkage gear rotates, the bilateral follower shafts and the bilateral limiting columns rotate synchronously until the bilateral limiting columns abut against the surfaces of the two pipelines.

[0012] Further, the continuous welding unit includes an adapter sleeve coaxially distributed with the bilateral positioning frame. A rotatable power gear ring is provided on the adapter sleeve, and an electric gear disk II meshing with the power gear ring is provided outside the adapter sleeve. As the electric gear disk II rotates, the power gear ring rotates synchronously.

[0013] An extension seat capable of rotating synchronously with the power gear ring is provided on the power gear ring. The extension seat faces the central axis direction of the pipeline, and a second welding machine capable of rotating synchronously with the extension seat is provided on the extension seat.

[0014] Further, the single-sided positioning unit includes a second limiting gear ring disposed on the single-sided positioning frame, a plurality of groups of second guiding racks disposed on the inner surface of the second limiting gear ring, and a second linkage gear meshing with the second guiding racks. A plurality of single-sided follower shafts evenly distributed along an annular track are provided inside the single-sided positioning frame, and the second linkage gears are all disposed at the ends of the single-sided follower shafts.

[0015] The unilateral follower shaft is provided with a unilateral limit post that can rotate synchronously with it. When the first limit gear ring and the second limit gear ring rotate synchronously, the unilateral follower shaft and the unilateral limit post rotate synchronously until the unilateral limit post abuts against the surface of the pipeline.

[0016] Furthermore, a first transmission gear disk and a second transmission gear disk that mesh with the second limit gear ring and the first limit gear ring respectively are provided outside the bilateral positioning frame and the unilateral positioning frame. The first transmission gear disk and the second transmission gear disk are connected by the same drive shaft, and a motor for controlling its rotation is provided at the end of the drive shaft.

[0017] In summary, the technical effects and advantages of the present invention are as follows:

[0018] 1. By performing positioning welding operations at the pipeline joint, the present invention can test the welding temperature and the operating mode of the welding machine until the quality of the positioning welding meets the ideal effect, so as to confirm the welding mode that best suits the stainless steel pipe. During the subsequent continuous welding operation, the trial-and-error cost during pipeline welding is reduced, the welding quality is improved, and at the same time, the working efficiency of pipeline welding is also improved.

[0019] 2. Through the combined setting of the bilateral limit unit and the unilateral limit unit, the present invention can always maintain the stability of the two pipelines during the welding operation, thereby ensuring the accuracy of pipeline docking, reducing the error of continuous welding operation, improving the accuracy of the short weld formed after the positioning welding operation, and thus ensuring the welding quality of the pipeline. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a three-dimensional structure schematic diagram of the present invention.

[0022] Figure 2 It is a structure schematic diagram when the pipeline of the present invention moves into the connection sleeve.

[0023] Figure 3 It is a structure schematic diagram after the pipeline of the present invention is detached.

[0024] Figure 4 It is a position schematic diagram of the bilateral positioning frame, the unilateral positioning frame and the connection sleeve of the present invention.

[0025] Figure 5Schematic diagram of the second perspective position of the bilateral positioning frame, unilateral positioning frame and connection sleeve of the present invention.

[0026] Figure 6 Schematic diagram of the positions of the bilateral positioning frame, first limiting gear ring, connection sleeve and power gear ring of the present invention.

[0027] Figure 7 Schematic diagram of the second perspective position of the bilateral positioning frame, first limiting gear ring, connection sleeve and power gear ring of the present invention.

[0028] Figure 8 Schematic diagram of the internal structure of the bilateral positioning frame and the first limiting gear ring of the present invention.

[0029] Figure 9 Schematic diagram of the second perspective of the internal structure of the bilateral positioning frame and the first limiting gear ring of the present invention.

[0030] Figure 10 Schematic diagram of the internal structure of the unilateral positioning frame and the second limiting gear ring of the present invention.

[0031] In the figure: 1. Bilateral positioning frame; 11. Arc-shaped arm; 12. Extension frame; 13. First welding machine; 14. Rotating rack; 15. Electric gear disk one; 16. Arc-shaped guiding frame; 2. First limiting gear ring; 21. First guiding rack; 22. First linkage gear; 23. Bilateral follower shaft; 24. Bilateral limiting column; 3. Unilateral positioning frame; 4. Second limiting gear ring; 41. Second guiding rack; 42. Second linkage gear; 43. Unilateral follower shaft; 44. Unilateral limiting column; 5. Connection sleeve; 6. Power gear ring; 61. Extension seat; 62. Second welding machine; 7. Electric gear disk two; 8. First transmission gear disk; 9. Second transmission gear disk. Detailed implementation method

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment 1: Refer to Figure 1-3The stainless steel pipe welding equipment shown includes a conveying roller seat capable of transferring two pipes, and also includes a double-sided positioning frame 1 arranged outside the pipe. Before welding, the pipe can be moved to the inside of the double-sided positioning frame 1 by the conveying roller seat, at which time, the ends of the pipe are in a butt-jointed state. A positioning welding unit capable of performing welding operations on different points at the interface is arranged in the double-sided positioning frame 1. During the operation of the positioning welding unit, the staff can adjust the welding temperature and the operation mode of the welding machine. If it is found that the weld state or the butt-jointed state of the pipe does not meet the expected requirements, adjustments can be made in time to confirm the welding mode that best suits the stainless steel pipe.

[0034] The bilateral positioning frame 1 is provided with a rotatable bilateral limiting unit. When the positioning welding unit performs welding operations on different points of the pipeline interface end, both pipelines are located inside the bilateral positioning unit. The bilateral positioning unit can maintain the stability of the two pipelines at the same time and improve the accuracy of the pipeline docking state.

[0035] Furthermore, it also includes a single-sided positioning frame 3 arranged on one side of the double-sided positioning frame 1. A continuous welding unit that can perform continuous welding operations on the interface end is arranged in the relative space between the double-sided positioning frame 1 and the single-sided positioning frame 3. When the positioning welding is completed, the welding mode that best suits the stainless steel pipe has been confirmed, and the conveying roller seat can move the two pipes to the inside of the continuous welding unit. The continuous welding unit can perform continuous and comprehensive welding operations on the pipes until the welding operations are all completed.

[0036] The unilateral positioning frame 3 is also provided with a unilateral positioning unit which can move synchronously with the bilateral limiting unit. When the welding port positions of the two pipes are moved to the inner side of the continuous welding unit, the two pipes are located on the inner side of the unilateral positioning unit and the bilateral positioning unit respectively. The unilateral positioning unit and the inner side of the bilateral positioning unit can also maintain the stability of the two pipes after movement, thereby further improving the stability of the continuous welding operation.

[0037] like Figure 4-7 As shown, specifically, the positioning welding unit includes a plurality of arc arms 11 equidistantly distributed along the annular track, a plurality of extension frames 12 connecting two adjacent arc arms 11 end to end, and a first welder 13 disposed on the extension frame 12. The arc arms 11 and the extension frames 12 are located inside the bilateral positioning frame 1 to form a closed annular structure, and the plurality of first welders 13 are equidistantly distributed outside the pipeline. The plurality of first welders 13 are directly facing the plurality of points at the pipeline interface, and the spacing between the plurality of points is equal. Therefore, during the operation of the first welder 13, welding operations can be performed at the points where the first welder 13 is located.

[0038] In order to maintain the stability of the arc-shaped arm 11 and the extension frame 12, multiple sets of arc-shaped guide frames 16 are arranged in the bilateral positioning frame 1, and arc-shaped channels are provided on the arc-shaped arm 11 for the arc-shaped guide frames 16 to pass through. When the arc-shaped arm 11 rotates, the relative distance between the arc-shaped channel and the arc-shaped guide frame 16 changes.

[0039] One of the multiple arc-shaped arms 11 is provided with a rotating rack 14. Outside the double-sided positioning frame 1, there is an electric gear disk one 15 meshing with the rotating rack 14. As the electric gear disk one 15 rotates, the rotating rack 14, the extension frame 12, the arc-shaped arm 11, and the first welding machine 13 all move along the outer surface of the pipeline. During the movement of the first welding machine 13, positioning welding operations can be performed on the position where it is located and parts in the vicinity.

[0040] By performing positioning welding operations at the pipeline joint, the welding temperature and the operating mode of the welding machine can be tested. After the positioning welding is completed, if it is found that the weld state or the butt joint state of the pipeline does not meet the expected requirements, the disassembly operation can be performed on the interface of the pipeline in a timely manner, and the positioning welding operation can be performed again until the quality of the positioning welding meets the ideal effect, so as to confirm the welding mode that best suits the stainless steel pipe.

[0041] As Figure 7-10 As shown, the double-sided positioning unit includes a first limiting gear ring 2 provided on the double-sided positioning frame 1, multiple groups of first guiding racks 21 provided on the inner surface of the first limiting gear ring 2, and a first linkage gear 22 meshing with the first guiding racks 21. Inside the double-sided positioning frame 1, there are multiple double-sided follower shafts 23 evenly distributed along the circular track. The first linkage gears 22 are all provided at the ends of the double-sided follower shafts 23.

[0042] The double-sided follower shaft 23 is provided with a double-sided limiting post 24 that can rotate synchronously with it. In order not to affect the rotation of the arc-shaped arm 11, the double-sided limiting post 24 is provided with a recess that can accommodate the exposed pipeline butt joint. The arc-shaped arm 11 rotates inside the recess. During the positioning welding operation, when the first linkage gear 22 rotates, the double-sided follower shaft 23 and the double-sided limiting post 24 rotate synchronously until the double-sided limiting post 24 abuts against the surfaces of the two pipelines.

[0043] The connection between the double-sided limiting post 24 and the two pipelines can maintain the stability of the pipelines, and further ensure the accuracy in the pipeline butt joint state, further improving the stability during the positioning welding operation and the quality of the short welds formed after the positioning welding operation.

[0044] Embodiment 2: As Figure 2-7 As shown, on the basis of Embodiment 1, after the positioning welding is completed, multiple points at the pipeline interface end have been connected. Subsequently, under the action of the conveyor roller path, the two pipelines can be synchronously moved towards the single-sided positioning frame 3 until they move into the continuous welding unit. The continuous welding unit includes an adapter sleeve 5 coaxially distributed with the double-sided positioning frame 1. The adapter sleeve 5 is provided with a rotatable power gear ring 6. Outside the adapter sleeve 5, there is an electric gear disk two 7 meshing with the power gear ring 6. As the electric gear disk two 7 rotates, the power gear ring 6 rotates synchronously.

[0045] An extension seat 61 that can rotate synchronously with the driving gear ring 6 is provided on the driving gear ring 6. The extension seat 61 faces the central axis direction of the pipeline, and a second welding machine 62 that can rotate synchronously with it is provided on the extension seat 61. As the driving gear ring 6 rotates, the second welding machine 62 provided on the extension seat 61 can move along the circular track at the pipeline interface to perform welding operations on the pipeline interface. Since multiple points of the two pipelines have been positioned and welded before, during the continuous welding operation, it is convenient to determine the welding temperature and the operating mode of the welding machine until the two pipelines are welded. The trial-and-error cost during pipeline welding is reduced, the welding quality is improved, and the working efficiency of pipeline welding is also improved.

[0046] As Figure 10 shown, the unilateral positioning unit includes a second limit gear ring 4 provided on the unilateral positioning frame 3, multiple groups of second guide racks 41 provided on the inner surface of the second limit gear ring 4, and second linkage gears 42 meshing with the second guide racks 41. A plurality of unilateral follower shafts 43 are equidistantly distributed along the circular track inside the unilateral positioning frame 3, and the second linkage gears 42 are all provided at the ends of the unilateral follower shafts 43.

[0047] A unilateral limit post 44 that can rotate synchronously with it is provided on the unilateral follower shaft 43. When the pipeline after positioning welding moves into the continuous welding unit for welding operations, the unit positioning unit and the bilateral positioning unit are respectively located outside the two pipelines. When the first limit gear ring 2 and the second limit gear ring 4 rotate synchronously, under the meshing force of the first guide rack 21 and the first linkage gear 22 and the second guide rack 41 and the second linkage gear 42, the bilateral follower shaft 23 and the unilateral follower shaft 43 can rotate synchronously, and further the bilateral limit post 24 and the unilateral limit post 44 can rotate synchronously. Since the bilateral limit unit and the unit limit unit are respectively located on both sides of the continuous welding unit, after the bilateral limit post 24 and the unilateral limit post 44 rotate synchronously to the extreme, the bilateral limit post 24 and the unilateral limit post 44 abut against the surfaces of the two pipelines.

[0048] During the process of the pipeline receiving continuous welding operations, the connection of the bilateral limit post 24 and the unilateral limit post 44 to the two pipelines can maintain the stability of the pipeline, further improve the stability of the continuous welding operation, reduce the error of the continuous welding operation, effectively improve the accuracy of the circular weld formed after the continuous welding operation, and thus ensure the welding quality of the pipeline.

[0049] As Figure 1-4As shown in the figure, in order to enable the first limit gear ring 2 and the second limit gear ring 4 to rotate synchronously and ensure the consistency of their movement trajectories, a first transmission gear disc 8 and a second transmission gear disc 9 that mesh with the second limit gear ring 4 and the first limit gear ring 2 are respectively provided outside the bilateral positioning frame 1 and the unilateral positioning frame 3. The first transmission gear disc 8 and the second transmission gear disc 9 are connected by the same drive shaft, and a motor for controlling its rotation is provided at the end of the drive shaft. When the motor operates, under the connection action of the drive shaft, the parallelly distributed first transmission gear disc 8 and the second transmission gear disc 9 can rotate synchronously, so as to achieve the purpose of driving the first limit gear ring 2 and the second limit gear ring 4 to rotate synchronously until the bilateral limit posts 24 and the unilateral limit posts 44 are pressed against the pipe surface.

[0050] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stainless steel pipe welding device, comprising a conveying roller seat capable of conveying two pipes, characterized in that: It also comprises a bilateral positioning frame (1) arranged outside the pipeline, wherein a positioning welding unit for performing welding operations on different points at the interface is arranged inside the bilateral positioning frame (1), and a rotatable bilateral limiting unit is arranged on the bilateral positioning frame (1), and when the positioning welding unit performs welding operations on different points at the pipeline interface end, the two pipelines are both located inside the bilateral positioning unit; It also includes a unilateral positioning frame (3) arranged on one side of the bilateral positioning frame (1); a continuous welding unit capable of performing continuous welding operations on the interface ends is arranged in the relative space between the bilateral positioning frame (1) and the unilateral positioning frame (3); the unilateral positioning frame (3) is also provided with a unilateral positioning unit capable of synchronously moving with the bilateral limiting unit; when the welding ports of the two pipes are moved to the inside of the continuous welding unit, the two pipes are located inside the unilateral positioning unit and the bilateral positioning unit respectively; First, the pipeline is moved to align the interface with the positioning welding unit, and the positioning welding unit is used to perform welding operations at different points on the interface. Then, the pipeline is moved again to align the interface with the continuous welding unit for continuous welding operations. The positioning welding unit comprises a plurality of arc-shaped arms (11) equidistantly distributed along a circular track, a plurality of extension frames (12) connecting two adjacent arc-shaped arms (11) end to end, and a first welder (13) disposed on the extension frame (12); the arc-shaped arms (11) and the extension frame (12) are located inside the bilateral positioning frame (1) to form a closed annular structure; and the plurality of first welders (13) are equidistantly distributed outside the pipeline; The bilateral positioning frame (1) is provided with a plurality of groups of arc-shaped guide frames (16), and the arc-shaped arms (11) are provided with arc-shaped channels through which the arc-shaped guide frames (16) can pass; one of the plurality of arc-shaped arms (11) is provided with a rotating rack (14), and the bilateral positioning frame (1) is provided with an electric gear plate (15) meshing with the rotating rack (14) outside; as the electric gear plate (15) rotates, the rotating rack (14), the extension frame (12), the arc-shaped arms (11) and the first welding machine (13) all move along the outer surface of the pipeline; The bilateral positioning unit comprises a first limit gear ring (2) arranged on the bilateral positioning frame (1), a plurality of first guide racks (21) arranged on the inner surface of the first limit gear ring (2), and a first linkage gear (22) meshing with the first guide rack (21); a plurality of bilateral follower shafts (23) equidistantly distributed along an annular track are arranged in the bilateral positioning frame (1); and the first linkage gears (22) are all arranged at the ends of the bilateral follower shafts (23); The double-sided follower shaft (23) is provided with a double-sided limit column (24) which can rotate synchronously therewith, and the double-sided limit column (24) is provided with a recessed portion which can accommodate the exposed joint of the pipeline, and the arc-shaped arm (11) is located inside the recessed portion. When the first linkage gear (22) rotates, the double-sided follower shaft (23) rotates synchronously with the double-sided limit column (24) until the double-sided limit column (24) abuts against the surfaces of the two pipelines; The continuous welding unit comprises a connection sleeve (5) coaxially distributed with the bilateral positioning frame (1), a rotatable power gear ring (6) is provided on the connection sleeve (5), and an electric gear plate (7) meshing with the power gear ring (6) is provided outside the connection sleeve (5), and the power gear ring (6) rotates synchronously with the rotation of the electric gear plate (7); The power gear ring (6) is provided with an extension seat (61) that can rotate synchronously therewith, the extension seat (61) faces the central axis direction of the pipeline, and the extension seat (61) is provided with a second welder (62) that can rotate synchronously therewith.

2. The stainless steel pipe welding equipment according to claim 1, characterized in that: The unilateral positioning unit comprises a second limiting gear ring (4) arranged on the unilateral positioning frame (3), a plurality of second guide racks (41) arranged on the inner surface of the second limiting gear ring (4), and a second linkage gear (42) meshing with the second guide rack (41); a plurality of unilateral follower shafts (43) equidistantly distributed along an annular track are arranged in the unilateral positioning frame (3); and the second linkage gears (42) are all arranged at the ends of the unilateral follower shafts (43); The unilateral follower shaft (43) is provided with a unilateral limiting column (44) which can rotate synchronously therewith; when the first limiting gear ring (2) and the second limiting gear ring (4) rotate synchronously, the unilateral follower shaft (43) and the unilateral limiting column (44) rotate synchronously until the unilateral limiting column (44) abuts against the surface of the pipeline.

3. The stainless steel pipe welding equipment according to claim 2, characterized in that: The double-sided positioning frame (1) and the single-sided positioning frame (3) are respectively provided with a first transmission gear plate (8) and a second transmission gear plate (9) meshing with the second limit gear ring (4) and the first limit gear ring (2); the first transmission gear plate (8) and the second transmission gear plate (9) are connected via a same driving shaft, and a motor for controlling the rotation of the driving shaft is provided at the end of the driving shaft.

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