Automatic steel pipe welding device

Abstract

The invention is suitable for the technical field of automatic welding equipment, and provides an automatic steel pipe welding device which comprises a circular guide rail and a welding body moving along the circular guide rail, the circular guide rail is used for being fixed to the periphery of a steel pipe, and a plurality of chain holes are formed in the circular guide rail at intervals in the circumferential direction of the circular guide rail; the welding body comprises a welding gun and a walking assembly driving the welding gun to move, the walking assembly is arranged on the circular guide rail in a sliding mode and comprises a rack, chain wheels are rotationally arranged on the rack, and the distance between every two adjacent chain holes is matched with the gear pitch of the chain wheels. The rack is further provided with a walking driving device for driving the chain wheels to rotate. The automatic welding device is simple in structure, small in size, convenient to carry to a construction site for use, capable of conducting welding automatically and capable of reducing the labor intensity of workers on the site.

Description

Technical Field

[0001] This application belongs to the field of automatic welding equipment technology, and in particular relates to an automatic welding device for steel pipes. Background Technology

[0002] In modern industry, pipeline construction is gradually shifting from manual welding to fully automated welding. This is especially true in the fields of oil and gas, chemical industry, and nuclear energy. Pipeline construction spans large areas and faces harsh construction environments. Furthermore, pipelines are developing towards high pressure and large diameter, which places higher demands on the quality and efficiency of pipeline welds.

[0003] Traditional steel pipe welding is typically performed on-site by skilled welders, resulting in low efficiency, high skill requirements, inconsistent weld quality, and high labor intensity. Existing automated welding robots usually have a welding torch at the end of a robotic arm. They identify the weld seam using a vision system, and the robotic arm controls the welding torch to move along the weld seam for automated welding. However, such equipment is usually bulky and needs to be fixed in a factory, making it unsuitable for use on construction sites. Summary of the Invention

[0004] The purpose of this application is to provide an automatic steel pipe welding device, which aims to solve the problem that traditional manual on-site welding is labor-intensive, while automatic welding equipment cannot be used on construction sites.

[0005] This application embodiment is implemented as follows: an automatic steel pipe welding device includes a circular guide rail and a welding body that moves along the circular guide rail. The circular guide rail is used to fix the steel pipe to the outer periphery. The circular guide rail is provided with a plurality of chain holes spaced apart along its circumference. The welding body includes a welding torch and a traveling assembly that drives the welding torch to move. The traveling assembly is slidably disposed on the circular guide rail. The traveling assembly includes a frame. A sprocket is rotatably disposed on the frame. The distance between two adjacent chain holes is adapted to the gear tooth pitch of the sprocket. The frame is also provided with a traveling drive device that drives the sprocket to rotate.

[0006] In some embodiments of this application, a plurality of abutment plates are provided at circumferential intervals on the inner side of the circular guide rail, and a telescopic assembly is provided between the abutment plates and the circular guide rail. The telescopic assembly is used to drive the abutment plates to telescopically move along the radial direction of the circular guide rail.

[0007] In some embodiments of this application, the telescopic assembly includes a guide rod and a sleeve. One end of the sleeve is fixedly connected to the abutment plate, and the other end is sleeved on one end of the guide rod. The other end of the guide rod is fixedly disposed on the circular guide rail. A fastening screw is threaded onto the sleeve and arranged radially thereon. After passing through the sleeve, the fastening screw abuts against the guide rod to limit the relative movement between the sleeve and the guide rod.

[0008] In some embodiments of this application, the walking assembly further includes a first friction wheel and a second friction wheel. The first friction wheel is coaxially fixed to the sprocket and abuts against the outer circumferential surface of the circular guide rail. The second friction wheel is rotatably mounted on the frame and abuts against the inner circumferential surface of the circular guide rail.

[0009] In some embodiments of this application, a rotating rod is also provided on the frame, the middle part of the rotating rod is hinged to the frame, and two second friction wheels are provided, which are respectively rotatably disposed at both ends of the rotating rod. Along the circumference of the circular guide rail, the two second friction wheels are respectively located on both sides of the first friction wheel.

[0010] In some embodiments of this application, the frame is further provided with an axial adjustment assembly. The axial adjustment assembly includes a first mounting bracket fixedly mounted on the frame. A first sliding member is slidably mounted on the first mounting bracket. The first sliding member slides along the axial direction of the circular guide rail. The first mounting bracket is also provided with an axial driving device for driving the first sliding member to slide. The first sliding member is used to drive the welding torch to move axially along the circular guide rail.

[0011] In some embodiments of this application, a radial adjustment assembly is provided on the first sliding member. The radial adjustment assembly includes a second mounting bracket fixedly disposed on the first sliding member. A second sliding member is slidably disposed on the second mounting bracket. The second sliding member slides radially along the circular guide rail. A radial driving device for driving the second sliding member to slide is also provided on the second mounting bracket. The second sliding member is used to drive the welding torch to move radially along the circular guide rail.

[0012] In some embodiments of this application, the second sliding member is provided with a tilt adjustment assembly. The tilt adjustment assembly includes a third mounting bracket fixedly mounted on the second sliding member. A first rotating bracket is rotatably mounted on the third mounting bracket. The third mounting bracket is also provided with a tilt driving device for driving the first rotating bracket to rotate. The first rotating bracket is used to drive the welding torch to rotate along the axial direction of the circular guide rail.

[0013] In some embodiments of this application, the first rotating frame is provided with a swing assembly, the swing assembly including a second rotating frame rotatably disposed on the first rotating frame, the rotation axis of the second rotating frame being perpendicular to the rotation axis of the first rotating frame, and the welding torch being fixedly disposed on the second rotating frame.

[0014] In some embodiments of this application, the frame is further provided with a welding wire feeding device. The welding wire feeding device includes a welding wire spool rotatably mounted on the frame and a welding wire driving device fixedly mounted on the frame. The welding wire driving device includes a fourth mounting frame fixed to the frame. A first roller and a second roller are rotatably mounted on the fourth mounting frame. The outer circumferential surfaces of the first roller and the second roller are used to abut against both sides of the welding wire. The fourth mounting frame is also provided with a feeding motor for driving the first roller or the second roller to rotate. The welding wire of the welding wire spool passes through the middle of the first roller and the second roller. The first roller and the second roller rotate to drive the welding wire feeding.

[0015] This application provides an automatic steel pipe welding device. A circular track is fixed on the steel pipe to be welded. A walking drive device drives a sprocket to rotate. The sprocket teeth engage with chain holes, so that the rotation of the sprocket drives the walking component to move along the circular guide rail, thereby driving the welding torch to move along the outer circumference of the steel pipe, realizing automatic welding of the steel pipe. This reduces the labor intensity of on-site workers. Moreover, the automatic welding device of this application has a simple structure, small size, and is easy to carry to the construction site for use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an automatic steel pipe welding device provided in an embodiment of this application;

[0017] Figure 2 for Figure 1 A partial view at point A in the middle;

[0018] Figure 3 This is a partial enlarged view of the circular guide rail provided in an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of the structure of the welding body provided in the embodiments of this application;

[0020] Figure 5 This is a structural schematic diagram of the welding body provided in an embodiment of this application from another perspective.

[0021] In the picture:

[0022] 10. Steel pipes;

[0023] 100. Circular guide rail; 110. Guide rod; 120. Sleeve; 130. Fastening screw; 140. Chain hole;

[0024] 200. Welding body; 210. Walking assembly; 211. Frame; 212. Rotating shaft; 213. Sprocket; 214. Driving gear; 215. Driven gear; 216. First friction wheel; 217. Rotating rod; 218. Second friction wheel; 220. Axial adjustment assembly; 221. First mounting bracket; 222. First sliding member; 223. Axial drive device; 230. Radial adjustment assembly; 231. Second mounting bracket; 232. Second sliding member; 233. Lead screw; 234. Nut; 235. Radial drive motor; 240. Tilt adjustment assembly; 241. Third mounting bracket; 242. Tilt drive motor; 243. First rotating frame; 250. Swing assembly; 251. Second rotating frame; 252. Swing drive motor; 260. Welding torch; 271. Welding wire spool; 272. First roller; 273. Second roller. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] The specific implementation of this application will be described in detail below with reference to specific embodiments.

[0027] like Figures 1 to 5 As shown in the figure, this application provides an automatic steel pipe welding device, including a circular guide rail 100 and a welding body 200 that moves along the circular guide rail 100. The circular guide rail 100 is used to fix the steel pipe 10 on its outer periphery. The circular guide rail 100 is provided with a plurality of chain holes 140 at intervals along its circumference. The welding body 200 includes a welding torch 260 and a walking component 210 for driving the welding torch 260 to move. The walking component 210 is slidably disposed on the circular guide rail 100. The walking component 210 includes a frame 211. A sprocket 213 is rotatably disposed on the frame 211. The distance between two adjacent chain holes 140 is adapted to the gear pitch of the sprocket 213. A walking drive device for driving the sprocket 213 to rotate is also provided on the frame 211.

[0028] In this embodiment, a circular track is fixed on the steel pipe 10 to be welded. The frame 211 can move along the circular guide rail 100. The walking drive device drives the sprocket 213 to rotate. The teeth of the sprocket 213 engage in the chain hole 140, so that when the sprocket 213 rotates, it can drive the walking component 210 to move along the circular guide rail 100, thereby driving the welding torch 260 to move along the outer circumference of the steel pipe 10, realizing automatic welding of the steel pipe 10. In this way, the labor intensity of on-site workers can be reduced. Moreover, the automatic steel pipe welding device of this application has a simple structure, small size, and is easy to carry to the construction site for use.

[0029] In some embodiments of this application, a plurality of abutment plates are spaced circumferentially along the inner side of the circular guide rail 100, and a telescopic assembly is provided between the abutment plates and the circular guide rail 100. The telescopic assembly is used to drive the abutment plates to telescopically move along the radial direction of the circular guide rail 100. In this embodiment, by adjusting the position of the abutment plates through the telescopic assembly, the circular guide rail 100 can be fixed on steel pipes 10 of different diameters, enabling welding of steel pipes 10 of various specifications.

[0030] like Figure 3 As shown, in some embodiments of this application, the telescopic assembly includes a guide rod 110 and a sleeve 120. One end of the sleeve 120 is fixedly connected to the abutment plate, and the other end is sleeved on one end of the guide rod 110. The other end of the guide rod 110 is fixedly mounted on the circular guide rail 100. A fastening screw 130 is threaded onto the sleeve 120 and arranged radially thereon. The fastening screw 130 passes through the sleeve 120 and abuts against the guide rod 110 to limit the relative movement between the sleeve 120 and the guide rod 110. In this embodiment, by loosening the fastening screw 130, adjusting the guide rod 110 and the sleeve 120 to a suitable position, and then tightening the fastening screw 130, the position adjustment of the abutment plate can be achieved, which is convenient and quick.

[0031] In some embodiments of this application, the circular guide rail 100 is formed by detachably connecting two semicircular rails. This facilitates the installation and removal of the circular guide rail 100.

[0032] like Figure 4 As shown, in some embodiments, a rotating shaft 212 is rotatably mounted on the frame 211, and a sprocket 213 is fixedly mounted on the rotating shaft 212. The walking drive device can be a walking drive motor, with a drive gear 214 mounted on the output shaft of the walking drive motor, and a driven gear 215 meshing with the drive gear 214 mounted on the rotating shaft 212. In this way, the walking drive motor can drive the sprocket 213 to rotate.

[0033] In some embodiments of this application, the walking assembly 210 further includes a first friction wheel 216 and a second friction wheel 218. The first friction wheel 216 is coaxially fixed to the sprocket 213 and abuts against the outer circumferential surface of the circular guide rail 100. The second friction wheel 218 is rotatably mounted on the frame 211 and abuts against the inner circumferential surface of the circular guide rail 100. In this embodiment, the first friction wheel 216 and the second friction wheel 218 ensure that the frame 211 moves along the circular guide rail 100. Figure 2 and Figure 4As shown, first friction wheels 216 are fixedly installed at both ends of the rotating shaft 212 to keep the frame 211 stable.

[0034] In some embodiments of this application, a rotating rod 217 is further provided on the frame 211. The middle part of the rotating rod 217 is hinged to the frame 211. Two second friction wheels 218 are provided, each rotatably disposed at one end of the rotating rod 217. Along the circumference of the circular guide rail 100, the two second friction wheels 218 are located on both sides of the first friction wheel 216. In this embodiment, the first friction wheel 216 and the two second friction wheels 218 are arranged in an isosceles triangle, which can ensure the stability of the frame 211 and prevent it from rotating relative to the circular guide rail 100. In addition, the middle part of the rotating rod 217 is rotatably connected to the frame 211, allowing the two second friction wheels 218 to rotate relative to each other to accommodate curvature changes in the circular track due to installation errors.

[0035] In some embodiments of this application, the frame 211 is further provided with an axial adjustment assembly 220. The axial adjustment assembly 220 includes a first mounting bracket 221 fixedly mounted on the frame 211. A first sliding member 222 is slidably mounted on the first mounting bracket 221. The first sliding member 222 slides along the axial direction of the circular guide rail 100. The first mounting bracket 221 is also provided with an axial driving device 223 for driving the first sliding member 222 to slide. The first sliding member 222 is used to drive the welding torch 260 to move axially along the circular guide rail 100. In some embodiments, the axial driving device 223 can be an electric push rod. In this embodiment, by driving the welding torch 260 to move axially along the circular guide rail 100 through the axial adjustment assembly 220, it is possible to adapt to some welding where the plane of the weld is not perpendicular to the axis of the steel pipe 10, for example, two steel pipes 10 are butted at 90°.

[0036] like Figure 5As shown in some embodiments of this application, a radial adjustment assembly 230 is provided on the first sliding member 222. The radial adjustment assembly 230 includes a second mounting bracket 231 fixedly mounted on the first sliding member 222. A second sliding member 232 is slidably mounted on the second mounting bracket 231. The second sliding member 232 slides radially along the circular guide rail 100. A radial driving device for driving the second sliding member 232 to slide is also provided on the second mounting bracket 231. The second sliding member 232 is used to drive the welding torch 260 to move radially along the circular guide rail 100. Specifically, the radial driving device includes a radial driving motor 235 and a lead screw 233 mounted on the second mounting bracket 231. The radial driving motor 235 and the lead screw 233 are transmitted through gears. A nut 234 is provided on the second sliding member 232, and the nut 234 is threadedly engaged with the lead screw 233. Thus, the radial drive motor 235 drives the lead screw 233 to rotate, and the cooperation between the lead screw 233 and the nut 234 drives the second sliding member 232 to slide. The radial adjustment assembly 230 drives the welding torch 260 to move radially along the circular guide rail 100 to accommodate steel pipes 10 of different diameters.

[0037] like Figure 5 As shown, in some embodiments of this application, the second sliding member 232 is provided with a tilt adjustment assembly 240. The tilt adjustment assembly 240 includes a third mounting bracket 241 fixedly mounted on the second sliding member 232. A first rotating bracket 243 is rotatably mounted on the third mounting bracket 241. The third mounting bracket 241 is also provided with a tilt drive device for driving the first rotating bracket 243 to rotate. The first rotating bracket 243 is used to drive the welding torch 260 to rotate along the axial direction of the circular guide rail 100. Specifically, the tilt drive device is a tilt drive motor 242, and the tilt drive motor 242 and the first rotating bracket 243 are transmitted through gears. In this embodiment, the tilt angle between the welding torch 260 and the steel pipe 10 is adjusted by the tilt adjustment assembly 240 to meet different welding process requirements.

[0038] like Figure 5 As shown, in some embodiments of this application, a swing assembly 250 is provided on the first rotating frame 243. The swing assembly 250 includes a second rotating frame 251 rotatably mounted on the first rotating frame 243. The rotation axis of the second rotating frame 251 is perpendicular to the rotation axis of the first rotating frame 243. The welding torch 260 is fixedly mounted on the second rotating frame 251. Specifically, as shown... Figure 5As shown, in some embodiments of this application, a swing drive motor 252 is further provided on the first rotating frame 243, and the output shaft of the swing drive motor 252 is fixedly connected to the second rotating frame 251. In this embodiment, the process requirements of fish scale welding can be achieved by driving the welding torch 260 to swing through the swing assembly 250.

[0039] like Figure 2 As shown in some embodiments of this application, the frame 211 is further provided with a welding wire feeding device. The welding wire feeding device includes a welding wire spool 271 rotatably mounted on the frame 211 and a welding wire driving device fixedly mounted on the frame 211. The welding wire driving device includes a fourth mounting frame fixed to the frame 211. A first roller 272 and a second roller 273 are rotatably mounted on the fourth mounting frame. The outer peripheral surfaces of the first roller 272 and the second roller 273 are used to abut against both sides of the welding wire. The fourth mounting frame is also provided with a feeding motor for driving the first roller 272 or the second roller 273 to rotate. The welding wire of the welding wire spool 271 passes through the middle of the first roller 272 and the second roller 273. The first roller 272 and the second roller 273 rotate to drive the welding wire feeding.

[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An automatic steel pipe welding device, characterized in that, The device includes a circular guide rail and a welding body that moves along the circular guide rail. The circular guide rail is used to fix the device to the outer periphery of a steel pipe. The circular guide rail has multiple chain holes spaced apart along its circumference. The welding body includes a welding torch and a traveling assembly that drives the welding torch to move. The traveling assembly is slidably disposed on the circular guide rail. The traveling assembly includes a frame. A sprocket is rotatably disposed on the frame. The distance between two adjacent chain holes is adapted to the gear tooth pitch of the sprocket. The frame is also provided with a traveling drive device that drives the sprocket to rotate.

2. The automatic steel pipe welding device according to claim 1, characterized in that, Multiple abutment plates are spaced apart along the circumference of the inner side of the circular guide rail. A telescopic assembly is provided between the abutment plates and the circular guide rail. The telescopic assembly is used to drive the abutment plates to move radially along the circular guide rail.

3. The automatic steel pipe welding device according to claim 2, characterized in that, The telescopic assembly includes a guide rod and a sleeve. One end of the sleeve is fixedly connected to the abutment plate, and the other end is sleeved on one end of the guide rod. The other end of the guide rod is fixedly mounted on the circular guide rail. A fastening screw is threaded onto the sleeve and arranged radially thereon. The fastening screw passes through the sleeve and abuts against the guide rod to limit the relative movement between the sleeve and the guide rod.

4. The automatic steel pipe welding device according to claim 1, characterized in that, The walking assembly further includes a first friction wheel and a second friction wheel. The first friction wheel is coaxially fixed to the sprocket and abuts against the outer circumferential surface of the circular guide rail. The second friction wheel is rotatably mounted on the frame and abuts against the inner circumferential surface of the circular guide rail.

5. The automatic steel pipe welding device according to claim 4, characterized in that, The frame is also provided with a rotating rod, the middle part of which is hinged to the frame. Two second friction wheels are provided, which are respectively rotatably disposed at both ends of the rotating rod. Along the circumference of the circular guide rail, the two second friction wheels are respectively located on both sides of the first friction wheel.

6. The automatic steel pipe welding device according to claim 1, characterized in that, The frame is also provided with an axial adjustment assembly, which includes a first mounting bracket fixedly mounted on the frame. A first sliding member is slidably mounted on the first mounting bracket. The first sliding member slides along the axial direction of the circular guide rail. The first mounting bracket is also provided with an axial driving device for driving the first sliding member to slide. The first sliding member is used to drive the welding torch to move axially along the circular guide rail.

7. The automatic steel pipe welding device according to claim 6, characterized in that, The first sliding member is provided with a radial adjustment component, the radial adjustment component includes a second mounting bracket fixedly mounted on the first sliding member, a second sliding member is slidably mounted on the second mounting bracket, the second sliding member slides radially along the circular guide rail, and the second mounting bracket is also provided with a radial driving device for driving the second sliding member to slide, the second sliding member is used to drive the welding torch to move radially along the circular guide rail.

8. The automatic steel pipe welding device according to claim 7, characterized in that, The second sliding member is provided with a tilt adjustment assembly, which includes a third mounting bracket fixedly mounted on the second sliding member. A first rotating bracket is rotatably mounted on the third mounting bracket. The third mounting bracket is also provided with a tilt driving device for driving the first rotating bracket to rotate. The first rotating bracket is used to drive the welding torch to rotate along the axial direction of the circular guide rail.

9. The automatic steel pipe welding device according to claim 8, characterized in that, The first rotating frame is provided with a swing assembly, the swing assembly includes a second rotating frame rotatably mounted on the first rotating frame, the rotation axis of the second rotating frame is perpendicular to the rotation axis of the first rotating frame, and the welding torch is fixedly mounted on the second rotating frame.

10. The automatic steel pipe welding device according to claim 1, characterized in that, The frame is also equipped with a welding wire feeding device, which includes a welding wire spool rotatably mounted on the frame and a welding wire driving device fixedly mounted on the frame. The welding wire driving device includes a fourth mounting frame fixed to the frame. A first roller and a second roller are rotatably mounted on the fourth mounting frame. The outer circumferential surfaces of the first roller and the second roller are used to abut against both sides of the welding wire. The fourth mounting frame is also equipped with a feeding motor for driving the first roller or the second roller to rotate. The welding wire of the welding wire spool passes through the middle of the first roller and the second roller. The first roller and the second roller rotate to drive the welding wire feeding.

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