Stainless steel pipe welding equipment

Abstract

The invention discloses stainless steel pipe welding equipment, and relates to the technical field of steel pipe machining equipment, the stainless steel pipe welding equipment comprises a conveying roller seat capable of conveying two pipelines, and further comprises a double-side positioning frame arranged outside the pipelines, and a positioning welding unit capable of welding different point positions at a connector is arranged in the double-side positioning frame; and a rotatable bilateral limiting unit is arranged on the bilateral positioning frame, and when the positioning welding unit conducts welding operation on different point positions of the connector ends of the pipelines, the two pipelines are both located on the inner side of the bilateral positioning unit. According to the method, the welding temperature and the operation mode of the welding machine can be tested by implementing the positioning welding operation at the pipeline joint until the quality of the positioning welding meets the ideal effect, so that the welding mode most conforming to the stainless steel pipe can be conveniently confirmed. And in the subsequent continuous welding operation implementation process, the trial and error cost in the pipeline welding process is reduced, the welding quality is improved, and meanwhile, the working efficiency of pipeline welding is also improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe processing equipment, in particular to stainless steel pipe welding equipment. Background Art

[0002] Stainless steel pipe welding is a common welding technology, widely used in construction, machinery, petrochemical and other fields. Before welding, the welding surface of the stainless steel pipe needs to be prepared. This includes removing impurities such as oil stains and oxide scale on the welding surface to ensure the quality of the weld. At the same time, the welding surface also needs to be grooved to improve the strength of the weld.

[0003] Most of the existing welding equipment used for stainless steel pipes uses a clamp to position the steel pipe, and then operates a mechanical arm, which is equipped with a welding machine to perform welding operations on the steel pipe. However, when welding large-diameter steel pipes, since the steel pipes have a certain wall thickness and are large in size, the welding path of the steel pipes is long during the welding operation at their interfaces. Therefore, if the welding temperature and the operating mode of the welding gun are not properly selected, the quality of the weld formed during the welding process is also easily affected. When a mechanical arm is equipped with a welding machine to weld a pipeline, once a weld of a certain length is formed, if the quality of the weld does not meet the requirements, it is inconvenient to make adjustments, and the welding quality is easily affected. Therefore, the present application provides a stainless steel pipe welding device to meet the needs. Summary of the invention

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

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a stainless steel pipe welding device, comprising a conveying roller seat capable of transferring two pipes, and also comprising a double-sided positioning frame arranged outside the pipe, wherein the double-sided positioning frame is provided with a positioning welding unit capable of performing welding operations on different points at the interface, and the double-sided positioning frame is provided with a rotatable double-sided limiting unit, and when the positioning welding unit performs welding operations on different points at the pipe interface end, the two pipes are both located on the inner side of the double-sided positioning unit.

[0006] It also includes a unilateral positioning frame arranged on one side of the bilateral positioning frame, and a continuous welding unit that can perform continuous welding operations on the interface end is arranged in the relative space between the bilateral positioning frame and the unilateral positioning frame. The unilateral positioning frame is also provided with a unilateral positioning unit that 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 respectively located on the inner side of the unilateral positioning unit and the bilateral positioning unit.

[0007] Furthermore, the positioning welding unit includes a plurality of arc arms equidistantly distributed along a circular trajectory, a plurality of extension frames connecting two adjacent arc arms end to end, and a first welder arranged on the extension frames. The arc arms and the extension frames are located on the inner side of the bilateral positioning frames to form a closed annular structure, and the plurality of first welders are equidistantly distributed outside the pipeline.

[0008] A plurality of groups of arc-shaped guide frames are arranged in the bilateral positioning frame, and arc-shaped channels for the arc-shaped guide frames to pass through are opened on the arc-shaped arms.

[0009] Furthermore, a rotating rack is provided on one of the multiple arc-shaped arms, and an electric gear plate meshing with the rotating rack is provided outside the double-sided positioning frame. As the electric gear plate rotates, the rotating rack, the extension frame, the arc-shaped arm and the first welding machine all move along the outer surface of the pipe.

[0010] Furthermore, the bilateral positioning unit includes a first limiting gear ring arranged on the bilateral positioning frame, multiple groups of first guide racks arranged on the inner surface of the first limiting gear ring, and a first linkage gear meshing with the first guide rack. The bilateral positioning frame is provided with multiple bilateral follower shafts equidistantly distributed along a circular trajectory, and the first linkage gears are all arranged at the ends of the bilateral follower shafts.

[0011] The double-sided follower shaft is provided with a double-sided limit column which can rotate synchronously therewith, and the double-sided limit column is provided with a recessed portion which can accommodate the exposed portion of the pipe joint, and the arc-shaped arm is located inside the recessed portion. When the first linkage gear rotates, the double-sided follower shaft rotates synchronously with the double-sided limit column until the double-sided limit column abuts against the surfaces of the two pipes.

[0012] Furthermore, the continuous welding unit includes a connecting sleeve coaxially distributed with the bilateral positioning frame, the connecting sleeve is provided with a rotatable power gear ring, and the connecting sleeve is provided with an electric gear plate 2 meshing with the power gear ring. As the electric gear plate 2 rotates, the power gear ring rotates synchronously.

[0013] An extension seat which can rotate synchronously with the power gear ring is arranged on the power gear ring, the extension seat faces the central axis direction of the pipeline, and a second welding machine which can rotate synchronously with the power gear ring is arranged on the extension seat.

[0014] Furthermore, the unilateral positioning unit includes a second limiting gear ring arranged on the unilateral positioning frame, multiple groups of second guide racks arranged on the inner surface of the second limiting gear ring, and a second linkage gear meshing with the second guide rack. The unilateral positioning frame is provided with multiple unilateral follower shafts equidistantly distributed along a circular trajectory, and the second linkage gears are all arranged at the ends of the unilateral follower shafts.

[0015] The unilateral follower shaft is provided with a unilateral limiting column which can rotate synchronously therewith. When the first limiting gear ring and the second limiting gear ring rotate synchronously, the unilateral follower shaft rotates synchronously with the unilateral limiting column until the unilateral limiting column abuts against the surface of the pipeline.

[0016] Furthermore, the double-sided positioning frame and the single-sided positioning frame are respectively provided with a first transmission gear plate and a second transmission gear plate meshing with the second limit gear ring and the first limit gear ring. The first transmission gear plate and the second transmission gear plate are connected by the same driving shaft, and the end of the driving shaft is provided with a motor to control its rotation.

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

[0018] 1. The present invention can test the welding temperature and the operation mode of the welding machine by performing the tack welding operation at the pipe joint until the quality of the tack welding meets the ideal effect, so as to confirm the welding mode that best suits the stainless steel pipe. In the subsequent implementation of the continuous welding operation, the trial and error cost in the pipeline welding process is reduced, the welding quality is improved, and the working efficiency of the pipeline welding is also improved.

[0019] 2. The present invention can always maintain the stability of the two pipes during the welding operation through the combination setting of the double-sided limit unit and the single-sided limit unit, thereby ensuring the accuracy of the pipe docking, reducing the error of the continuous welding operation, and improving the accuracy of the short weld formed after the positioning welding operation, thereby ensuring the welding quality of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[0025] Figure 5It is a schematic diagram of the positions of the double-sided positioning frame, the single-sided positioning frame and the connecting sleeve of the shell of the present invention from a second viewing angle.

[0026] Figure 6 It is a schematic diagram of the positions of the bilateral positioning frame, the first limiting gear ring, the connecting sleeve and the power gear ring of the present invention.

[0027] Figure 7 It is a schematic diagram of the positions of the bilateral positioning frame, the first limiting gear ring, the connecting sleeve and the power gear ring from a second viewing angle of the present invention.

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

[0029] Fig. 9 It is a schematic diagram from a second perspective of the internal structure of the bilateral positioning frame and the first limiting gear ring of the present invention.

[0030] Fig.10 It is a schematic diagram of the internal structure of the single-sided positioning frame and the second limiting gear ring of the present invention.

[0031] In the figure: 1. bilateral positioning frame; 11. arc arm; 12. extension frame; 13. first welding machine; 14. rotating rack; 15. electric gear plate one; 16. arc guide frame; 2. first limit gear ring; 21. first guide rack; 22. first linkage gear; 23. bilateral follower shaft; 24. bilateral limit column; 3. unilateral positioning frame; 4. second limit gear ring; 41. second guide rack; 42. second linkage gear; 43. unilateral follower shaft; 44. unilateral limit column; 5. connecting sleeve; 6. power gear ring; 61. extension seat; 62. second welding machine; 7. electric gear plate two; 8. first transmission gear plate; 9. second transmission gear plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: Reference 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, and the double-sided positioning frame 1 is provided with an electric gear plate 15 meshing with the rotating rack 14. With the rotation of the electric gear plate 15, the rotating rack 14, the extension frame 12, the arc-shaped arm 11 and the first welder 13 all move along the outer surface of the pipe. During the movement of the first welder 13, the positioning welding operation can be performed on the point where it is located and the parts nearby.

[0040] By performing positioning welding operations at the pipe joints, 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 docking state of the pipeline does not meet the expected requirements, the interface of the pipeline can be disassembled in time, 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] like Figure 7-10 As shown, the bilateral positioning unit includes a first limiting gear ring 2 arranged on the bilateral positioning frame 1, multiple groups of first guide racks 21 arranged on the inner surface of the first limiting gear ring 2, and a first linkage gear 22 meshing with the first guide rack 21. The bilateral positioning frame 1 is provided with multiple bilateral follower shafts 23 equidistantly distributed along a circular trajectory, and the first linkage gears 22 are all arranged at the ends of the bilateral follower shafts 23.

[0042] The double-sided follower shaft 23 is provided with a double-sided limit column 24 that can rotate synchronously therewith. In order not to affect the rotation of the arc-shaped arm 11, a concave portion that can accommodate the exposed joint of the pipeline is opened on the double-sided limit column 24, and the arc-shaped arm 11 rotates inside the concave portion. During the positioning welding operation, 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.

[0043] The connection between the double-sided limit posts 24 and the two pipes can maintain the stability of the pipes, thereby ensuring the accuracy of the pipes in the butt joint state, further improving the stability during the positioning welding operation, and improving the quality of the short welds formed after the positioning welding operation.

[0044] Example 2: Figure 2-7 As shown, based on Example 1, after the positioning welding is completed, multiple points on the pipe interface end have been connected. Subsequently, under the action of the conveying roller, the two pipes can be synchronously moved toward the single-sided positioning frame 3 until they are moved into the continuous welding unit. The continuous welding unit includes a connecting sleeve 5 coaxially distributed with the bilateral positioning frame 1, and a rotatable power gear ring 6 is provided on the connecting sleeve 5. An electric gear plate 2 7 meshing with the power gear ring 6 is provided outside the connecting sleeve 5. As the electric gear plate 2 7 rotates, the power gear ring 6 rotates synchronously.

[0045] The power gear ring 6 is provided with an extension seat 61 which 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 which can rotate synchronously therewith. As the power gear ring 6 rotates, the second welder 62 provided on the extension seat 61 can move along the annular 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, it is convenient to determine the welding temperature and the welding machine operation mode during the continuous welding operation until the two pipelines are welded. The trial and error cost in the pipeline welding process is reduced, the welding quality is improved, and the work efficiency of pipeline welding is also improved.

[0046] like Fig.10 As shown, the unilateral positioning unit includes a second limiting gear ring 4 arranged on the unilateral positioning frame 3, multiple groups 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. The unilateral positioning frame 3 is provided with multiple unilateral follower shafts 43 equidistantly distributed along a circular trajectory, and the second linkage gears 42 are all arranged at the ends of the unilateral follower shafts 43.

[0047] A unilateral limiting column 44 is provided on the unilateral follower shaft 43 and can rotate synchronously with it. When the pipeline after positioning welding is completed moves to the inside of the continuous welding unit to receive welding operation, the unit positioning unit and the bilateral positioning unit are respectively located on the outside of the two pipelines. When the first limiting gear ring 2 and the second limiting 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 be rotated synchronously, and then the bilateral limiting column 24 and the unilateral limiting column 44 can be rotated synchronously. Since the bilateral limiting unit and the unit limiting unit are respectively located on both sides of the continuous welding unit, after the bilateral limiting column 24 and the unilateral limiting column 44 rotate synchronously to the limit, the bilateral limiting column 24 and the unilateral limiting column 44 abut against the surfaces of the two pipelines.

[0048] During the continuous welding operation on the pipeline, the connection between the double-sided limit column 24 and the single-sided limit column 44 and 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, and effectively improve the accuracy of the annular weld formed after the continuous welding operation is completed, thereby ensuring the welding quality of the pipeline.

[0049] like Figure 1-4As shown, 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 motion trajectories, 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 are respectively provided outside the bilateral positioning frame 1 and the unilateral positioning frame 3. The first transmission gear plate 8 and the second transmission gear plate 9 are connected by the same driving shaft, and a motor for controlling their rotation is provided at the end of the driving shaft. When the motor is running, under the connection of the driving shaft, the first transmission gear plate 8 and the second transmission gear plate 9 distributed in parallel can be rotated synchronously 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 column 24 and the unilateral limit column 44 are pressed against the pipeline surface.

[0050] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should 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 capable of 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; The invention also comprises 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.

2. The stainless steel pipe welding equipment according to claim 1, characterized in that: 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.

3. The stainless steel pipe welding equipment according to claim 2, characterized in that: A rotating rack (14) is provided on one of the plurality of arc-shaped arms (11), and an electric gear plate (15) meshing with the rotating rack (14) is provided outside the bilateral positioning frame (1). As the electric gear plate (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.

4. The stainless steel pipe welding equipment according to claim 2, characterized in that: 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.

5. The stainless steel pipe welding equipment according to claim 1, characterized in that: 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.

6. The stainless steel pipe welding equipment according to claim 4, 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.

7. The stainless steel pipe welding equipment according to claim 6, 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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