Automatic pipe girth welding equipment

Abstract

The application provides a pipeline girth automatic welding device, relates to a pipeline, and comprises a machine body, a first machine stand and a second machine stand arranged on the top of the machine body, a rotating shaft movably arranged on the inner side of the first machine stand and the second machine stand, a rotating seat connected to the outer end of the rotating shaft, a pipeline clamping unit arranged above the two rotating seats, an adjusting and positioning unit arranged at the bottom of the two rotating seats, and a welding unit arranged on the back of the machine body. The adjusting and positioning unit is used for adjusting the included angle of the two rotating seats, so that the pipeline girth automatic welding device can meet the requirements of the conventional girth welding of two horizontal pipelines after coaxial butt joint and the butt joint welding of the horizontal pipeline and the vertical pipeline in the orthogonal plane. During the adjusting process, the double positioning arms are synchronously driven through the gear meshing, so that the pipeline girth automatic welding device can also be suitable for the non-standard special-shaped alignment of the horizontal pipeline and the inclined pipeline, and the rotating shaft is synchronously driven by the driving motor after the alignment.

Description

Technical Field

[0001] This invention relates to the field of welding, and more specifically, to an automatic welding device for pipe circumferential seams. Background Technology

[0002] In fields such as petrochemicals, municipal engineering, and building electromechanical systems, pipeline laying often involves the connection of pipe sections with different routes. Conventional automatic pipe circumferential welding equipment mostly adopts a fixed coaxial clamping structure, which can only be adapted to welding scenarios where two pipe sections are coaxially and linearly joined, and has obvious limitations.

[0003] When faced with non-coaxial connection requirements (such as irregular connections between horizontal main pipes and vertical branch pipes, or inclined pipes and horizontal pipes), it is impossible to adjust the angle between the two pipe sections. Manual support and positioning are required before welding, resulting in poor welding accuracy and high labor intensity.

[0004] Therefore, we have made improvements to this and proposed an automatic welding equipment for pipe circumferential seams. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic welding device for pipe circumferential seams, which solves the problem of being unable to adjust the included angle of two pipe sections when facing non-coaxial connection requirements by setting an adjustment and positioning unit.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] An automatic pipe circumferential welding device includes a machine body and a first base and a second base located on both sides of the top of the machine body. A rotating shaft is movably mounted on the inner side of both the first base and the second base. A rotating seat is connected to the outer end of the rotating shaft. A pipe clamping unit is mounted on the top of each of the two rotating seats. An adjustment and positioning unit is mounted on the bottom of the two rotating seats. A welding unit is also installed on the back of the machine body. The pipe clamping on the two pipe clamping units can be adjusted and fixed by the adjustment and positioning unit.

[0008] As a preferred technical solution of this application, the pipe clamping unit includes a support cylinder movably connected to the surface of the rotating seat and a guide column fixed inside the support cylinder. A support plate is fixed to the surface of the guide column, and lower clamping plates are fixed to both sides of the top of the support plate.

[0009] As a preferred technical solution of this application, the surface of the guide post is provided with a sliding groove, a slider is slidably assembled in the sliding groove, a support frame is connected to the outside of the slider, and an upper clamping plate corresponding to the lower clamping plate is fixed at both ends of the support frame.

[0010] As a preferred technical solution of this application, the bottom of the support cylinder is provided with a multi-position locking block, the top of the multi-position locking block is connected to a connecting rod, and one end of the connecting rod passes through the support cylinder and is fixed to the slider;

[0011] The top of the slider is connected to a spring that is connected to the top wall of the guide post.

[0012] As a preferred technical solution of this application, anti-return blocks are slidably provided on both sides of the slider, and a support spring is provided inside the slider, with the two ends of the support spring respectively connected to the corresponding anti-return blocks.

[0013] As a preferred technical solution of this application, the adjustment and positioning unit includes an L-shaped connecting plate connected to one of the rotating seats and a U-shaped seat slidably assembled therewith, and an adjustment screw threadedly connected to the U-shaped seat is movably connected to the L-shaped connecting plate.

[0014] The U-shaped base is movably connected to both ends of a positioning arm. One end of the positioning arm is connected to a gear, and the two gears mesh with each other. The other end of the positioning arm has a positioning hole.

[0015] As a preferred technical solution of this application, a positioning part is fixed on the inner side of the positioning arm, and a locking groove is opened on the surface of the multi-position locking block. The locking groove has a locking surface, and there are eight locking surfaces. The eight locking surfaces are connected end to end to form an octagonal locking part.

[0016] The adjustment and positioning unit further includes a guide plate fixedly connected to another rotating seat and a movable plate slidably disposed on the surface of the guide plate. The surface of the movable plate is threaded with locking bolts. The bottom of the positioning arm is provided with a connecting plate. Both sides of the surface of the connecting plate are threaded with positioning bolts. The positioning bolts pass through the positioning holes and are threaded to the movable plate.

[0017] As a preferred technical solution of this application, the welding unit includes a multi-axis displacement mechanism fixed to the back of the machine body and a welding torch installed at the output end of the multi-axis displacement mechanism. The welding torch is used to connect to an external gas source.

[0018] As a preferred technical solution of this application, a drive motor is installed on the outer side of both the first base and the second base, and the output end of the drive motor is coaxially fixed with the corresponding rotating shaft.

[0019] As a preferred technical solution of this application, the first base is fixedly installed on the surface of the machine body, the second base is slidably assembled on the slide rail surface of the machine body, the first base is also provided with an adjusting screw for threaded connection with the second base, and an adjusting motor for driving the adjusting screw is installed on the surface of the first base.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] In the scheme of this application:

[0022] 1. By setting two independently rotatable rotating seats and adjusting the angle between the two rotating seats with the adjustment positioning unit, it can meet the conventional circumferential welding of two horizontal pipe sections after coaxial connection, and can also realize the orthogonal butt welding of horizontal and vertical pipes. During the adjustment process, the double positioning arms move synchronously through gear meshing, and can also adapt to non-standard irregular alignment of horizontal and inclined pipes. After alignment, the rotating shaft can be driven synchronously by the drive motor to complete the automatic circumferential welding of the pipe, breaking through the limitation of traditional equipment that can only adapt to coaxial linear welding.

[0023] 2. After the upper clamping plate of the pipe clamping unit presses down to clamp the pipe, the two positioning arms of the positioning unit move closer together. The positioning part will be embedded in the octagonal locking groove of the multi-position locking block. On the one hand, the locking surface restricts the vertical displacement of the slider along the guide column, thereby achieving rigid locking of the upper clamping plate in the height direction and avoiding loosening of the clamping due to welding vibration.

[0024] On the other hand, by restricting the rotational freedom of the support cylinder through the octagonal locking part, the horizontal angle limit of the pipe clamping unit is directly completed, without the need for an additional independent anti-rotation structure, thus improving the positioning accuracy of a single station.

[0025] 3. The upper and lower clamping plates are adaptively raised and lowered along the guide column by the slider, and with the octagonal hierarchical locking of the multi-position locking block, it can cover the clamping needs of various pipe diameters without the need for frequent tooling changes; at the same time, the distance between the second base and the first base can be adjusted along the slide rail to accommodate the welding of more pipe sections.

[0026] 4. Through the coordinated operation of the pipe clamping unit and the adjustment and positioning unit, after the pipe clamping and fixing is completed, the two positioning arms can simultaneously embed into the multi-position locking blocks on both sides to achieve a rigid connection between the two rotating seats, thereby forming a synchronous rotating whole structure. In this state, only one drive motor needs to be started to synchronously drive the two rotating seats and the pipe clamped on them to rotate together, which simplifies the drive control logic and reduces energy consumption.

[0027] When the two drive motors work synchronously, since the two rotating seats are mechanically locked by the positioning arm, they cannot deflect relative to each other. This can effectively eliminate the phenomenon of asynchronous rotation caused by differences in drive response, uneven load, or transmission error, significantly reduce the relative angular deviation of the circumferential seam between the two pipes during the welding process, and improve the roundness and forming quality of the circumferential seam weld. Attached Figure Description

[0028] Figure 1A structural schematic diagram of an automatic pipe circumferential welding device provided in this application;

[0029] Figure 2 This application provides a schematic diagram of the first welding state structure of an automatic pipe circumferential welder.

[0030] Figure 3 This application provides a schematic diagram of the second welding state structure of an automatic pipe circumferential welding device;

[0031] Figure 4 This application provides a schematic diagram of the third welding state structure of an automatic welding device for pipe circumferential seams;

[0032] Figure 5 This application provides a cross-sectional structural schematic diagram of an automatic pipe circumferential welding device;

[0033] Figure 6 This application provides a schematic diagram of the adjustment and positioning unit structure of an automatic pipe circumferential welding device;

[0034] Figure 7 A schematic diagram of the second embodiment of the adjustment and positioning unit of an automatic pipe circumferential welding equipment provided in this application;

[0035] Figure 8 A schematic diagram of a multi-position locking block structure for an automatic pipe circumferential welding device provided in this application;

[0036] Figure 9 This application provides a side view structural schematic diagram of an automatic pipe circumferential welding device;

[0037] Figure 10 This application provides an automatic pipe circumferential welder. Figure 5 Enlarged structural diagram at point A in the middle.

[0038] The image shows:

[0039] 1. Machine body; 2. Pipe clamping unit; 3. Adjustment and positioning unit; 4. Welding unit; 5. Multi-position locking block; 6. Drive motor; 7. Slide rail; 8. Adjusting screw; 9. Adjusting motor;

[0040] 11. First machine base; 12. Second machine base; 13. Rotating shaft; 14. Rotating seat;

[0041] 21. Support cylinder; 22. Guide column; 23. Support plate; 24. Lower clamping plate; 25. Slide groove; 26. Slider; 27. Support frame; 28. Upper clamping plate; 29. ​​Connecting rod;

[0042] 260. Spring; 261. Support spring; 262. Check block;

[0043] 31. L-shaped connecting plate; 32. U-shaped seat; 33. Adjusting screw; 34. Positioning arm; 35. Gear; 36. Positioning hole; 37. Guide plate; 38. Movable plate; 39. Connecting plate;

[0044] 370. Positioning section;

[0045] 390. Locating bolt; 391. Locking bolt;

[0046] 41. Multi-axis displacement mechanism; 42. Welding torch;

[0047] 51. Locking groove; 52. Locking surface; 53. Octagonal locking part. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0049] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0050] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0051] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0052] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] Please see Figures 1 to 10The present invention provides a technical solution: an automatic pipe circumferential welding device, comprising a body 1 and a first base 11 and a second base 12 disposed on the top sides of the body 1. A rotating shaft 13 is movably mounted on the inner side of the first base 11 and the second base 12. A rotating seat 14 is connected to the outer end of the rotating shaft 13. A pipe clamping unit 2 is mounted on the top of each of the two rotating seats 14. An adjustment and positioning unit 3 is mounted on the bottom of the two rotating seats 14. A welding unit 4 is also installed on the back of the body 1. The pipe clamping on the two pipe clamping units 2 can be adjusted and fixed by the adjustment and positioning unit 3.

[0054] Because the automatic pipe circumferential welding equipment of the present invention has the above structure, the top of the machine body 1 is provided with an independently rotatable first base 11 and a second base 12, which are connected to the rotating seat 14 through a rotating shaft 13, so that the two sets of pipe clamping units 2 can be rotated synchronously or independently with the rotating seat 14; the adjustment and positioning unit 3 spans the bottom of the two rotating seats 14, and can change the relative angle between the two rotating seats and lock them under manual or electric adjustment; the welding unit 4 is located on the back of the machine body and is aligned with the circumferential seam of the two pipes. This structure allows the equipment to adapt to coaxial symmetrical pipes, and can also realize the alignment and circumferential welding of non-coaxial irregular pipes such as horizontal-vertical and horizontal-inclined by adjusting the angle between the two rotating seats, which significantly broadens the applicable scenarios of the automatic welding equipment.

[0055] like Figure 5 As shown, the pipe clamping unit 2 includes a support cylinder 21 movably connected to the surface of the rotating seat 14 and a guide column 22 fixed inside the support cylinder 21. A support plate 23 is fixed to the surface of the guide column 22, and lower clamping plates 24 are fixed to both sides of the top of the support plate 23.

[0056] The support cylinder 21 can rotate relative to the rotating seat 14 without shaking or falling off. In this embodiment, the lower clamping plate 24 is V-shaped. The purpose of this design is to be able to adapt to more types of steel pipes and realize the applicable range of welding equipment.

[0057] Because the automatic pipe circumferential welding equipment of the present invention has the above structure, the support cylinder 21 is rotatably mounted on the rotating seat 14, so that the entire pipe clamping unit 2 can rotate around the normal of the rotating seat as needed to adapt to different pipe placement angles; the guide column 22 is fixed inside the support cylinder and is provided with a sliding groove 25, providing a unique vertical guide for the slider 26 and preventing swaying during the clamping process; the support plate 23 and its upper V-shaped lower clamping plate 24 can support the round pipe from the bottom and adapt to different pipe diameters. This structure improves the pipe diameter compatibility range and clamping stability while ensuring that the spatial relationship between the clamping center and the rotation axis is controllable.

[0058] The guide post 22 has a groove 25 on its surface. A slider 26 is slidably mounted in the groove 25. The slider 26 can only slide along the height direction of the groove 25. A support frame 27 is connected to the outside of the slider 26. Both ends of the support frame 27 are fixed with upper clamping plates 28 corresponding to the lower clamping plate 24. The support frame 27 extends to the outside through the groove 25 to connect the upper clamping plates 28. It should be noted that the setting of the support frame 27 does not affect the sliding of the slider 26 in the groove 25.

[0059] Because the automatic pipe circumferential welding equipment of the present invention has the above structure, the slider 26 and the slide groove 25 can only move along the height direction of the guide column 22 through sliding engagement. The connecting rod 29 drives the support frame 27 and the upper clamping plate 28 to rise and fall synchronously. The upper clamping plate 28 and the lower clamping plate 24 form a clamping space corresponding to each other. Pressing down on the upper clamping plate can adapt to different pipe diameters and complete the initial clamping. This structure uses a simple linear lifting mechanism to achieve rapid clamping of pipe fittings, and the clamping height can be freely adjusted according to the pipe diameter without the need to change the clamps.

[0060] like Figure 8 As shown, the bottom of the support cylinder 21 is provided with a multi-position locking block 5, and the top of the multi-position locking block 5 is connected to a connecting rod 29. One end of the connecting rod 29 passes through the support cylinder 21 and is fixed to the slider 26. The top of the slider 26 is connected to a spring 260 that is connected to the top wall of the guide post 22.

[0061] like Figure 10 As shown, both sides of the slider 26 are provided with a check block 262. The slider 26 is provided with a support spring 261 inside. The two ends of the support spring 261 are respectively connected to the corresponding check block 262. With the support spring 261, both check blocks 262 can slide outward in the natural state, so that the check block 262 abuts against the side wall of the guide post 22. In this way, through the frictional force after abutting, the slider 26 can be suspended at any height.

[0062] Because the automatic pipe circumferential welding equipment of the present invention has the above structure, the support spring 261 pushes the two check blocks 262 outwards to the slider 26, so that it generates friction with the side wall of the guide column 22 groove 25. When the slider 26 is pressed down to fit the pipe fitting with the upper clamping plate 28, the external force is removed. The self-locking friction between the check block and the groove wall can temporarily suspend the slider at any height position, providing an operation window for the subsequent precise alignment and locking of the multi-position locking block 5 and the positioning arm 34, avoiding accidental slippage of the clamping parts and improving the ease of clamping.

[0063] The adjustment and positioning unit 3 includes an L-shaped connecting plate 31 connected to one of the rotating seats 14 and a U-shaped seat 32 slidably assembled therewith. An adjusting screw 33 is movably connected to the L-shaped connecting plate 31 and threadedly connected to the U-shaped seat 32. Rotating the adjusting screw 33 can make it threadedly engage with the U-shaped seat 32, so that the height of the U-shaped seat 32 can be adjusted relative to the L-shaped connecting plate 31.

[0064] The U-shaped base 32 is movably connected to both ends of a positioning arm 34. One end of the positioning arm 34 is connected to a gear 35, and the two gears 35 mesh with each other. The other end of the positioning arm 34 has a positioning hole 36. When one of the positioning arms 34 is moved outward, the two gears 35 can simultaneously drive the other positioning arm 34 to swing, thereby quickly achieving the locking or unlocking effect of the multi-position locking block 5.

[0065] Because the automatic pipe circumferential welding equipment of the present invention has the above structure, the L-shaped connecting plate 31 moves with one of its rotating seats 14. When the adjusting screw 33 rotates, it drives the U-shaped seat 32 to slide vertically along the L-shaped connecting plate, thereby adjusting the height of the positioning arm 34 as a whole to adapt to different locking groove heights. The gears 35 at the ends of the two positioning arms 34 mesh with each other. When either positioning arm is swung, it can drive the other arm to swing in the opposite direction synchronously, ensuring that the two positioning arms always open and close symmetrically and simultaneously engage or disengage from the locking grooves 51 of the multi-position locking blocks 5 on both sides. This structure realizes one-time synchronous locking / unlocking of the double-sided clamping unit, which is simple to operate and has balanced force on both sides.

[0066] like Figure 8 As shown, a positioning part 370 is fixed on the inner side of the positioning arm 34, and a locking groove 51 is opened on the surface of the multi-position locking block 5. The locking groove 51 has a locking surface 52, and there are eight locking surfaces 52. The eight locking surfaces 52 are connected end to end to form an octagonal locking part 53.

[0067] Because the automatic pipe circumferential welding equipment of the present invention has the above structure, the outer periphery of the multi-position locking block 5 is formed by eight locking surfaces 52 connected end to end to form an octagonal locking part 53, with an included angle of 45° between adjacent locking surfaces. The positioning part 370 on the inner side of the positioning arm is a planar structure. When the positioning part is embedded in the locking groove 51, it forms a surface contact with the locking surface, which can restrict the up and down movement of the slider 26 to achieve clamping and locking, and can also restrict the rotational freedom of the support cylinder 21 relative to the rotating seat 14 through the octagonal polygonal side surface, so as to achieve one-time locking of the circumferential angle of the pipe clamping unit. The 45° indexing design can meet the angle alignment requirements of common orthogonal and oblique pipe fittings and ensure a large locking contact area and strong anti-torsion ability.

[0068] The locking groove 51 has multiple locking grooves, which are evenly distributed along the height direction of the multiple locking blocks 5. In this way, the fixing requirements of pipes of different specifications can be met by setting multiple locking grooves 51.

[0069] Because the automatic pipe circumferential welding equipment of the present invention has the above structure, multiple locking grooves 51 are arranged at equal intervals along the height direction of the multiple locking blocks 5. When the upper clamping plate 28 is pressed down to different heights due to changes in pipe diameter, there is always one locking groove that can be aligned and embedded with the positioning part 370. Matching can be completed by adjusting the height of the positioning arm by adjusting the screw 33. Thus, the same clamping-locking mechanism is applicable to various pipe diameter specifications, reducing the frequency of tooling replacement and improving versatility.

[0070] The adjustment and positioning unit 3 further includes a guide plate 37 fixedly connected to another rotating seat 14 and a movable plate 38 slidably disposed on the surface of the guide plate 37. The surface of the movable plate 38 is threaded with a locking bolt 391. Thus, the position of the movable plate 38 and the surface of the guide plate 37 can be adjusted and fixed by the action of the locking bolt 391.

[0071] Because the automatic pipe circumferential welding equipment of the present invention has the above structure, the guide plate 37 moves or rotates with the other rotating seat 14, and the movable plate 38 can slide along the guide plate to compensate for the change in horizontal distance between the two rotating seats 14 caused by the change in the included angle or the change in pipe length. After adjustment, the locking bolt 391 is tightened to fix it. This structure ensures that no matter whether the two rotating seats are in a parallel, vertical or inclined relative posture, the positioning bolt 390 can pass smoothly through the connecting plate 39 and the positioning hole 36 and lock it in the movable plate 38, so as to realize the secondary fixation of the positioning arm unfolding angle and height and enhance the overall locking rigidity.

[0072] The bottom of the positioning arm 34 is provided with a connecting plate 39. Both sides of the surface of the connecting plate 39 are threaded with positioning bolts 390. The positioning bolts 390 pass through the positioning holes 36 and are threaded onto the movable plate 38. When the two positioning arms 34 approach each other to form a parallel state and limit the multi-position locking block 5, one end of the positioning bolt 390 can pass through the connecting plate 39 and the positioning holes 36 in sequence and be threaded onto the movable plate 38. This can not only fix the two positioning arms 34 in the unfolded state, but also support the positioning arms 34 in the height direction.

[0073] like Figure 9As shown, the welding unit 4 includes a multi-axis displacement mechanism 41 fixed to the back of the body 1 and a welding torch 42 installed at the output end of the multi-axis displacement mechanism 41. The welding torch 42 is used to connect to an external gas source. The multi-axis displacement mechanism 41 can realize the movement and adjustment of the welding torch 42 in multiple directions, so that the angle of the welding torch 42 can be better adjusted in the actual welding process, thereby improving the welding efficiency and practicality.

[0074] Because the automatic pipe circumferential welding equipment of the present invention has the above structure, the multi-axis displacement mechanism 41 can drive the welding torch 42 to make fine adjustments along multiple directions (X, Y, Z axes) and swing angles, so that the welding torch is always aligned with the circumferential seam of the two pipes. In the case of irregular butt joints (non-coaxial), the spatial position of the welding torch can be corrected in real time as the rotating seat 14 drives the pipe to rotate, ensuring that the electric arc or flame acts stably on the weld. This structure, together with the rotatable clamping unit, realizes automated welding from conventional coaxial circumferential seams to unconventional posture circumferential seams.

[0075] Both the first base 11 and the second base 12 are equipped with drive motors 6 on their outer sides. The output end of the drive motor 6 is coaxially fixed with the corresponding rotating shaft 13. Starting the drive motor 6 can drive the rotating shaft 13 and the rotating seat 14 on it to rotate. Figure 2 and Figure 3 As shown, circumferential welding of the pipe seam at the contact position can be achieved in the rotating state.

[0076] Because the automatic pipe circumferential welding equipment of the present invention has the above structure, the output end of the drive motor 6 is coaxially fixed to the rotating shaft 13. After starting, it can synchronously drive the rotating seats 14 on both sides and the pipes clamped on them to rotate around their respective rotating shafts. When the two pipes are coaxially connected, they rotate synchronously at the same speed. When the pipes are irregularly connected, at least the active side pipe rotates. It works with the welding gun to complete the circumferential welding, avoiding manual pipe turning and improving welding uniformity and operational safety.

[0077] The first base 11 is fixedly installed on the surface of the body 1, and the second base 12 is slidably assembled on the surface of the slide rail 7 on the surface of the body 1. The first base 11 is also provided with an adjusting screw 8 for threaded connection with the second base 12. An adjusting motor 9 for driving the adjusting screw 8 is installed on the surface of the first base 11. Starting the adjusting motor 9 can drive the adjusting screw 8 to rotate, so that the adjusting screw 8 and the second base 12 form a threaded engagement, thereby driving the second base 12 to slide along the length direction of the body 1, thereby realizing the adjustment of the distance between the first base 11 and the second base 12 to meet the welding adjustment requirements of pipes of different lengths.

[0078] Because the automatic pipe circumferential welding equipment of the present invention has the above structure, the second base 12 is slidably engaged with the slide rail 7 on the machine body 1, and the adjusting motor 9 drives the adjusting screw 8 to rotate and engage with the thread of the second base, thereby precisely changing the center distance between the first base 11 and the second base 12 to adapt to the clamping and docking requirements of pipe sections of different lengths; this adjustment process does not affect the pre-set included angle between the two rotating seats, so that the equipment has both pipe length adaptability and angle adjustability.

[0079] In practical applications, such as Figure 2 and Figure 3 As shown, when welding is required on the pipes in these two states, first place the two pipes into the corresponding lower clamping plates 24, then rotate the pipe clamping unit 2 to the closed angle, and press down the upper clamping plate 28 to make it fit tightly against the surface of the pipe. When it is pressed down, the check block 262 will form a preliminary positioning effect on the height of the upper clamping plate 28.

[0080] Then, move one of the positioning arms 34, so that the two positioning arms 34 can move closer synchronously through the meshing action of the gear 35, and finally make the positioning part 370 on the positioning arm 34 engage in the corresponding locking groove 51. At this time, the positioning part 370 will form a planar contact with the locking surface 52 in the corresponding locking groove 51. Then, one end of the positioning bolt 390 passes through the connecting plate 39 and the positioning hole 36 in sequence and is threaded onto the movable plate 38. This can not only fix the two positioning arms 34 in the unfolded state, but also support the positioning arms 34 in the height direction.

[0081] Finally, the clamping plate 28 forms a stable fixing effect, ensuring the fixation of the pipe. At this time, the drive motor 6 can be started to drive the rotating shaft 13 to rotate, so that the rotating seat 14 drives the pipe on it to rotate, and the output end of the welding gun 42 can be welded to the connection of the pipe in the rotating state.

[0082] Furthermore, through the aforementioned structural fit and operational procedures, welding can be performed on parallel pipes under normal conditions, and simultaneously... Figure 3 As shown, it can perform alignment welding in the connection state of horizontal and vertical pipes, breaking through the limitation of traditional equipment that can only be adapted to coaxial linear welding.

[0083] Through the coordinated cooperation of the pipe clamping unit 2 and the adjustment and positioning unit 3, after the pipe clamping and fixing is completed, the two positioning arms 34 can simultaneously embed into the multi-position locking blocks 5 on both sides, realizing a rigid connection between the two rotating seats 14, so that the two rotating seats 14 form a synchronous rotating overall structure; in this state, only one drive motor 6 needs to be started to synchronously drive the two rotating seats 14 and the pipe clamped on them to rotate together, simplifying the drive control logic and reducing energy consumption.

[0084] When the two drive motors 6 work synchronously, since the two rotating seats 14 are mechanically locked by the positioning arm 34, they cannot be relatively deflected. This can effectively eliminate the phenomenon of asynchronous rotation caused by differences in drive response, uneven load or transmission error, significantly reduce the relative angle deviation of the circumferential seam of the two pipes during the welding process, and improve the roundness and forming quality of the circumferential seam weld.

[0085] And such Figure 4 As shown, the alignment state is achieved by adjusting the angle of the pipe clamping unit 2 on the surface of the rotating seat 14. This state can clamp and fix the pipe. After the pipe is fixed, the welding gun 42 can be used for alignment welding. However, it should be noted that when the rotating seat 14 is rotated, since the pipe does not rotate along the axis of the rotating shaft 13, the angle of the welding gun needs to be adjusted flexibly to better fit the weld seam for welding, and thus circumferential welding operation can also be achieved.

[0086] Meanwhile, when two pipes are placed and aligned for welding in irregular positions, the pipes need to be fixed in place. As the rotating seat 14 rotates, the height or position of the welding torch 42 is continuously adjusted to achieve circumferential welding. In this state, the main purpose of this device is to fix the pipe weld. In actual welding, it can also be used in conjunction with a manual welding torch for auxiliary welding. This device mainly plays the role of clamping, positioning and rotation support, while also enabling the rotation of the pipe, which can better assist in achieving circumferential welding, thus further enhancing the multifunctionality of the device.

[0087] like Figure 8 As shown, the multi-position locking block 5 in this embodiment is a regular octagon, so it has eight sides. That is, the minimum rotation angle for each side change is 45 degrees. Therefore, when aligning two pipes, the angle can only be adjusted at the initial angle by 45 degrees or multiples of 45 degrees. This ensures that the surface in contact with the positioning part 370 is always in a planar state after adjustment, thus guaranteeing the stability of the multi-position locking block 5 in the locked state.

[0088] When welding in batches of replacing pipes, the pipe diameter may change. This requires adjusting the multi-position locking block 5 and the adjustment positioning unit 3 to better adapt to the change in pipe diameter. Specifically, first, adjust the height of the positioning arm 34 by rotating the adjusting screw 33 according to the pipe size, so that the positioning part 370 can be aligned with the corresponding locking groove 51 when the positioning arm 34 is finally positioned.

[0089] When the length of the pipe changes, causing a change in the distance between the two rotating seats 14 at the weld, it is necessary to adjust the horizontal position of the movable plate 38 on the surface of the guide plate 37 and finally fix it by locking bolt 391. After the two positioning arms 34 are combined to form a fixed state, the bolts passing through the positioning holes 36 can correspond to the movable plates 38 on both sides.

[0090] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. An automatic welding device for pipe circumferential seams, characterized in that, The device includes a body (1) and a first base (11) and a second base (12) located on the top sides of the body (1). The inner sides of the first base (11) and the second base (12) are movably equipped with a rotating shaft (13). The outer ends of the rotating shaft (13) are connected to a rotating seat (14). A pipe clamping unit (2) is installed above each of the two rotating seats (14). An adjustment and positioning unit (3) is installed at the bottom of the two rotating seats (14). A welding unit (4) is also installed on the back of the body (1). The pipe clamping on the two pipe clamping units (2) can be adjusted and fixed by the adjustment and positioning unit (3).

2. The automatic pipe circumferential welding equipment according to claim 1, characterized in that, The pipe clamping unit (2) includes a support cylinder (21) movably connected to the surface of the rotating seat (14) and a guide column (22) fixed inside the support cylinder (21). A support plate (23) is fixed on the surface of the guide column (22), and lower clamping plates (24) are fixed on both sides of the top of the support plate (23).

3. The automatic pipe circumferential welding equipment according to claim 2, characterized in that, The guide post (22) has a groove (25) on its surface. A slider (26) is slidably mounted in the groove (25). A support frame (27) is connected to the outside of the slider (26). Both ends of the support frame (27) are fixed with an upper clamping plate (28) corresponding to the lower clamping plate (24).

4. The automatic pipe circumferential welding equipment according to claim 3, characterized in that, The bottom of the support cylinder (21) is provided with a multi-position locking block (5), and the top of the multi-position locking block (5) is connected to a connecting rod (29). One end of the connecting rod (29) passes through the support cylinder (21) and is fixed to the slider (26). The top of the slider (26) is connected to a spring (260) that is connected to the top wall of the guide post (22).

5. The automatic pipe circumferential welder according to claim 3, characterized in that, Both sides of the slider (26) are provided with a check block (262), and the slider (26) is provided with a support spring (261) inside. The two ends of the support spring (261) are respectively connected to the corresponding check block (262).

6. The automatic pipe circumferential welder according to claim 4, characterized in that, The adjustment and positioning unit (3) includes an L-shaped connecting plate (31) connected to one of the rotating seats (14) and a U-shaped seat (32) slidably assembled therewith. An adjustment screw (33) is movably connected to the L-shaped connecting plate (31) and threadedly connected to the U-shaped seat (32). The U-shaped seat (32) is movably connected to both ends of a positioning arm (34), one end of the positioning arm (34) is connected to a gear (35), the two gears (35) mesh with each other, and the other end of the positioning arm (34) has a positioning hole (36).

7. The automatic pipe circumferential welder according to claim 6, characterized in that, The positioning arm (34) has a positioning part (370) fixed on its inner side. The surface of the multi-position locking block (5) is provided with a locking groove (51). The locking groove (51) has a locking surface (52). There are eight locking surfaces (52). The eight locking surfaces (52) are connected end to end to form an octagonal locking part (53). The adjustment and positioning unit (3) further includes a guide plate (37) fixedly connected to another rotating seat (14) and a movable plate (38) slidably disposed on the surface of the guide plate (37). The surface of the movable plate (38) is threaded with locking bolts (391). The bottom of the positioning arm (34) is provided with a connecting plate (39). Both sides of the surface of the connecting plate (39) are threaded with positioning bolts (390). The positioning bolts (390) pass through the positioning hole (36) and are threaded onto the movable plate (38).

8. The automatic pipe circumferential welder according to claim 7, characterized in that, The welding unit (4) includes a multi-axis displacement mechanism (41) fixed to the back of the body (1) and a welding torch (42) installed at the output end of the multi-axis displacement mechanism (41). The welding torch (42) is used to connect to an external gas source.

9. The automatic pipe circumferential welder according to claim 1, characterized in that, A drive motor (6) is installed on the outer side of both the first base (11) and the second base (12), and the output end of the drive motor (6) is fixed coaxially with the corresponding rotating shaft (13).

10. An automatic pipe circumferential welder according to claim 1, characterized in that, The first base (11) is fixedly installed on the surface of the body (1), and the second base (12) is slidably assembled on the surface of the slide rail (7) on the surface of the body (1). The first base (11) is also provided with an adjusting screw (8) for threaded connection with the second base (12). An adjusting motor (9) for driving the adjusting screw (8) is installed on the surface of the first base (11).

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