A pipe welding apparatus
By designing weld guides and arc adjustment components, the problems of welding torch tracking welds and avoiding spot welding positions were solved, achieving high-precision welding results and improving welding quality and applicability. In particular, it maintains concentricity and avoids spot welding positions when welding deep bevels, reducing the defect rate.
Patent Information
- Application Number
- CN202611040661.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-14
- Publication Date
- 2026-08-25
AI Technical Summary
Existing welding devices for welded pipes are difficult to guide the welding torch to track the weld, affecting welding quality. Furthermore, traditional laser-based weld detection methods are not suitable for swing arc welding, have poor versatility, and are difficult to avoid spot welding positions during the welding process, leading to weld positioning failure.
Welding guides are used in conjunction with welding components to guide the welding torch to track the weld seam. Arc adjustment components and starting point control components are used to improve the welding adaptability and accuracy of the welding torch, avoid spot welding positioning melting, and ensure the accuracy of wire feeding and arc starting position.
It improves welding precision and adaptability, avoids weld positioning failure, enhances welding quality and device functionality, especially in deep bevel welding to maintain concentricity and avoid spot welding positions, thus reducing the defect rate.
Smart Images
Figure CN122625752A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of welded pipe welding technology, specifically to a welded pipe weld seam tracking welding device. Background Technology
[0002] As the name suggests, welded pipes are pipe fittings formed by welding. In actual welded pipe welding work, circumferential welding is widely used. Welding can extend the pipe fitting. Usually, a special circumferential welding machine is used. First, the pipe fitting is beveled at the welding point, then tack welded for positioning. Then, the pipe fitting is driven by the pipe fitting drive structure to rotate. During the process, the welding torch on the welding torch holder can quickly complete the circumferential welding. However, current welded pipe welding devices are not convenient for physically guiding the welding torch to track the weld. Moreover, with the long-term use of the welding torch holder and other factors, the weld and welding torch are prone to misalignment, affecting the welding quality. At the same time, traditional laser-based weld seam detection methods are difficult to adapt to arc welding, resulting in poor versatility. In addition, when performing spot welding positioning at the weld seam, traditional welded pipe welding devices are not convenient for prompting workers to avoid the spot welding position. If the arc ignition position coincides with the spot welding position, the spot weld will melt again. Under the pressure of the pipe fitting clamping structure, the weld positioning purpose fails, directly affecting the concentricity accuracy of the pipe fitting spot welding and affecting the welding quality. Summary of the Invention
[0003] The purpose of this invention is to provide a welded pipe seam tracking welding device to solve the problems mentioned in the background art, such as the inconvenience of guiding the welding torch to track the weld seam and the inconvenience of prompting workers to avoid the spot welding position.
[0004] To achieve the above objectives, the present invention provides the following technical solution: a welded pipe weld seam tracking welding device, comprising a welding mounting component, wherein a welding part is mounted on the welding mounting component; the welding part is used for circumferential welding, and a weld seam guide is mounted on the welding part; the weld seam guide is used to guide the welding part to track the weld seam; an arc adjustment component is mounted on the weld seam guide; a welding wire guide is mounted on the welding part; a starting point control component is mounted on the weld seam guide; the welding mounting component includes: a welding mounting plate and guide slide shafts, wherein two guide slide shafts are fixedly mounted on the welding mounting plate; and four through holes are provided on the welding mounting plate for bolts to pass through and be mounted on an automatic welding machine bracket.
[0005] Preferably, the welding mounting component further includes: adapter springs, with two adapter springs respectively sleeved on the two guide slide shafts; the ends of the two front adapter springs are respectively fixedly connected to the guide slide shafts; and the ends of the two rear adapter springs are respectively fixedly connected to the welding mounting plate.
[0006] Preferably, the welding part includes: a mounting slider, a welding gun, a conductive nozzle, and a guide groove. The mounting slider is slidably mounted on two guide shafts. Two adapter springs on the two guide shafts are respectively located on both sides of the mounting slider. A welding gun is fixedly mounted on the mounting slider. A conductive nozzle is fixedly mounted on the end of the welding gun, and a guide groove is formed on the conductive nozzle. The welding gun is connected to an external welding machine.
[0007] Preferably, the weld guide includes: a fixed connecting sleeve, a support arm, and an electromagnet. The fixed connecting sleeve is fixedly sleeved on the welding torch; the support arm is fixedly installed on the fixed connecting sleeve; the support arm is aligned with the welding torch; the electromagnet is fixedly installed on the support arm via a bracket, and the electromagnet is used to magnetically attract the weld pipe; the electromagnet is connected to an external power source.
[0008] Preferably, the weld guide further includes: a guide wheel, a limiting ring, an adapter groove, and an anti-loosening bolt. The guide wheel is rotatably sleeved on the bottom end of the support arm. Limiting rings are fixedly installed at both ends of the guide wheel, and the two limiting rings are used to roll and fit against the inner side of the weld pipe bevel. An adapter groove is provided on the guide wheel, and the adapter groove is a V-shaped groove. The adapter groove is located in the middle of the guide wheel. An anti-loosening bolt is threaded onto the support arm.
[0009] Preferably, the swing adjustment component includes: an adjusting screw, a positioning hole, and a limiting block. The adjusting screw is rotatably mounted on the support arm. A ring of positioning holes is formed on the adjusting screw. The end of the anti-loosening bolt is inserted into the positioning hole. The limiting block is slidably inserted into the support arm. The adjusting screw is threadedly connected to the limiting block. The two sides of the end of the limiting block have a beveled structure. Ball bearings are embedded in the end and both sides of the limiting block. The ball bearings at the end of the limiting block roll and fit against the inner side of the adapter groove.
[0010] Preferably, the welding wire guide includes: a guide sliding sleeve and positioning bolts, wherein the guide sliding sleeve is slidably sleeved on the conductive nozzle; two positioning bolts are threadedly connected to the guide sliding sleeve, and the ends of the two positioning bolts are respectively pressed and fitted against the outside of the conductive nozzle; a raised strip is provided on the inner side of the guide sliding sleeve, and the raised strip on the inner side of the guide sliding sleeve is slidably installed in a guide groove.
[0011] Preferably, the welding wire guide further includes: a guide frame, which is fixedly mounted on the guide sliding sleeve, and the guide frame has an L-shaped structure; the guide frame has a through hole through which the welding wire passes; the through hole on the guide frame is concentric with the conductive nozzle.
[0012] Preferably, the starting control component includes: a rotating arm, a rotary shaft, and a torsion spring. The rotary shaft is fixedly mounted on the rotating arm and rotatably mounted on a fixed connecting sleeve. A torsion spring is sleeved on the rotary shaft. One end of the torsion spring is fixedly connected to the rotary shaft, and the other end of the torsion spring is fixedly connected to the fixed connecting sleeve.
[0013] Preferably, the starting point control component further includes: an elastic steel sheet and a limit switch, wherein the elastic steel sheet is fixedly installed at the bottom of the rotating arm; the bottom end of the elastic steel sheet is lower than the conductive nozzle; the limit switch is fixedly installed on the fixed connecting sleeve; the rotating arm is pressed against the pressing end of the limit switch; and the limit switch is electrically connected to the welding machine power supply connected to the welding torch.
[0014] Compared with the prior art, the beneficial effects of the present invention are:
[0015] This invention employs a weld seam guide in conjunction with the welding unit to guide the welding torch to track the weld seam during circumferential welding, thereby improving the welding accuracy of the welding torch. The use of an arc adjustment component in conjunction with the weld seam guide further enhances the welding adaptability of this structure to the welding torch. Whether performing continuous welding or arc welding, it can guide the welding torch and adapt to the swing range of arc welding, improving the functional adaptability of the device. This avoids the problem of traditional laser-based guiding structures being unable to guide the welding torch during arc welding. The structure is simple to control, and adjustments are faster and more direct.
[0016] Using a guide frame can guide the welding wire and improve the wire feeding accuracy, especially for deep bevel welding, where the contact tip is difficult to insert into the weld. In this case, the wire feed is relatively long. The guide frame can guide the welding wire and keep the wire and contact tip concentric. At the same time, the height can be adjusted with the guide sliding sleeve. As the cover welding progresses, the height of the guide frame can be gradually increased without affecting the normal welding.
[0017] By employing a starting point control component, workers can be prompted to avoid the spot welding positioning point when welding deep bevel circumferential seams. This maintains weld accuracy and prevents the spot welding positioning point from melting due to the high temperature at the moment of arc initiation when the arc initiation point is directly at the spot welding positioning point. Under the pressure of the pipe clamping structure, one of the three spot welding positioning points at the weld may be missing instantly. In this case, the weld at the arc initiation point will shrink due to the missing positioning point, directly affecting the weld formation quality. This structure uses an elastic steel sheet to quickly detect the spot welding positioning point and provides prompts in conjunction with limit switch control. The elastic structure of the elastic steel sheet is adaptable to the arc welding operation of the welding torch and can achieve self-adaptation through elastic bending. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of a welded pipe weld seam tracking welding device according to the present invention;
[0019] Figure 2 This is a schematic diagram of the bottom structure of a welded pipe weld seam tracking welding device according to the present invention;
[0020] Figure 3 This is a schematic diagram of the structure of the welding mounting component of the present invention;
[0021] Figure 4 For the present invention Figure 2 Enlarged view of the structure of region B in the middle;
[0022] Figure 5 This is a schematic diagram of the weld guide of the present invention;
[0023] Figure 6 This is a schematic diagram of the structure of the swing arc adjustment component of the present invention;
[0024] Figure 7 This is a schematic diagram showing the location of the adapter slot in this invention;
[0025] Figure 8 This is a cross-sectional view of the installation position of the limiting insert block of the present invention;
[0026] Figure 9 This is a schematic diagram of the starting point control component of the present invention;
[0027] Figure 10 For the present invention Figure 9 Enlarged view of the structure of region H in the middle.
[0028] In the attached diagram, the components represented by each number are as follows:
[0029] 1. Welding mounting components; 101. Welding mounting plate; 102. Guide slide shaft; 103. Adaptor spring; 2. Welding section; 201. Mounting slider; 202. Welding torch; 203. Conductive nozzle; 2031. Guide groove; 3. Weld seam guide; 301. Fixed connecting sleeve; 302. Support arm; 303. Electromagnet; 304. Guide wheel; 3041. Limit ring; 3042. Adaptor groove; 305. Anti-loosening bolt; 4. Swing arc adjustment component; 401. Adjusting screw; 4011. Positioning hole; 402. Limiting block; 5. Welding wire guide; 501. Guide sliding sleeve; 502. Positioning bolt; 503. Guide frame; 6. Starting point control component; 601. Rotating arm; 6011. Rotating shaft; 6012. Torsion spring; 602. Elastic steel sheet; 603. Limit switch. Detailed Implementation
[0030] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0031] This invention provides a technical solution: such as Figures 1 to 10 The illustrated welding device for tracking weld seams of welded pipes includes a welding mounting component 1, on which a welding part 2 is mounted. The welding part 2 is used for circumferential welding, and a weld seam guide 3 is mounted on the welding part 2. The weld seam guide 3 is used to guide the welding part 2 to track the weld seam. An arc adjustment component 4 is mounted on the weld seam guide 3. A welding wire guide 5 is mounted on the welding part 2. A starting point control component 6 is mounted on the weld seam guide 3. The welding mounting component 1 includes a welding mounting plate 101 and guide slide shafts 102. Two guide slide shafts 102 are fixedly mounted on the welding mounting plate 101. The welding mounting plate 101 has four through holes for bolts to pass through and be mounted on the bracket of an automatic welding machine.
[0032] The welding mounting component 1 further includes: adapter springs 103, with two adapter springs 103 respectively fitted on the two guide slide shafts 102; the ends of the two front adapter springs 103 are respectively fixedly connected to the guide slide shafts 102; the ends of the two rear adapter springs 103 are respectively fixedly connected to the welding mounting plate 101; the welding part 2 includes: mounting slider 201, welding torch 202, conductive nozzle 203, and guide groove 2031, with the mounting slider 201 slidably mounted on the two guide slide shafts 102; the two guide slide shafts 102 have two... A pair of adapter springs 103 are located on both sides of the mounting slider 201; a welding torch 202 is fixedly mounted on the mounting slider 201; a conductive nozzle 203 is fixedly mounted on the end of the welding torch 202, and a guide groove 2031 is formed on the conductive nozzle 203; a welding machine is connected to the welding torch 202; the weld guide 3 includes: a fixed connecting sleeve 301, a support arm 302, and an electromagnet 303, the fixed connecting sleeve 301 is fixedly sleeved on the welding torch 202; the support arm 302 is fixedly mounted on the fixed connecting sleeve 301; the support arm 302 is aligned with the welding torch 202; the support arm 302 is aligned with the welding torch 202; the support arm 302 is fixedly mounted on the welding torch 202; the welding torch 2 ... An electromagnet 303 is fixedly mounted on the arm 302 via a bracket, and the electromagnet 303 is used for magnetically attracting the welded pipe; the electromagnet 303 is connected to an external power supply; the weld guide 3 also includes: a guide wheel 304, a limiting ring 3041, an adapter groove 3042, and an anti-loosening bolt 305. The guide wheel 304 is rotatably sleeved on the bottom end of the support arm 302; limiting rings 3041 are fixedly mounted on both ends of the guide wheel 304, and the two limiting rings 3041 are respectively used to roll and fit against the inner side of the welded pipe bevel; the guide wheel 304 has an adapter groove 3042, and the adapter... The groove 3042 is a V-shaped groove; the adapter groove 3042 is located in the middle of the guide wheel 304; the support arm 302 is threaded with an anti-loosening bolt 305; the weld guide 3 is used in conjunction with the welding part 2 to guide the welding torch 202 to track the weld during circumferential welding, which can improve the welding accuracy of the welding torch 202. Especially for deep bevel cover welding, this structure has a simple and direct guiding method, which improves the weld quality, can extend the maintenance and debugging cycle of the welding torch 202, and reduce the weld defect rate caused by factors such as wear of the support structure of the welding torch 202.
[0033] The swing adjustment component 4 includes: an adjusting screw 401, a positioning hole 4011, and a limiting block 402. The adjusting screw 401 is rotatably mounted on the support arm 302. A ring of positioning holes 4011 is formed on the adjusting screw 401. The end of the anti-loosening bolt 305 is inserted into the positioning hole 4011. The limiting block 402 is slidably inserted into the support arm 302. The adjusting screw 401 is threadedly connected to the limiting block 402. The two sides of the end of the limiting block 402 have a beveled structure. Ball bearings are embedded at the end and on both sides of the limiting block 402. The ball bearings at the end of the limiting insert 402 roll and fit against the inner side of the adapter groove 3042; the use of the swing arc adjustment component 4 in conjunction with the weld guide component 3 can further improve the welding adaptability of this structure to the welding torch 202. Whether performing continuous welding or swing arc welding, the welding torch 202 can be guided. At the same time, it adapts to the swing range of swing arc welding, improves the functional adaptability of this device, and avoids the problem that traditional laser-type guiding structures are difficult to guide during swing arc welding. The structure is simple to control, and the adjustment is also faster and more direct.
[0034] The welding wire guide 5 includes: a guide sliding sleeve 501 and positioning bolts 502. The guide sliding sleeve 501 is slidably sleeved on the conductive nozzle 203. Two positioning bolts 502 are threadedly connected to the guide sliding sleeve 501, and the ends of the two positioning bolts 502 are respectively pressed and fitted against the outside of the conductive nozzle 203. A raised strip is provided on the inner side of the guide sliding sleeve 501, and the raised strip on the inner side of the guide sliding sleeve 501 is slidably installed in a guide groove 2031. The welding wire guide 5 also includes: a guide frame 503, which is fixedly installed on the guide sliding sleeve 501. It has an L-shaped structure; the guide frame 503 has a through hole, through which the welding wire passes; the through hole on the guide frame 503 is concentric with the conductive nozzle 203; the guide frame 503 can guide the welding wire and improve the wire output accuracy, especially for deep bevel welding, where the conductive nozzle 203 is difficult to insert into the weld, and the wire output is relatively long. The guide frame 503 can guide the welding wire and keep the concentricity between the welding wire and the conductive nozzle 203 up to standard. At the same time, the height can be adjusted with the guide sliding sleeve 501. As the cover welding progresses, the height of the guide frame 503 can be gradually increased without affecting normal welding.
[0035] The starting control component 6 includes: a rotating arm 601, a rotating shaft 6011, and a torsion spring 6012. The rotating shaft 6011 is fixedly mounted on the rotating arm 601, and the rotating shaft 6011 is rotatably mounted on the fixed connecting sleeve 301. The torsion spring 6012 is sleeved on the rotating shaft 6011. One end of the torsion spring 6012 is fixedly connected to the rotating shaft 6011, and the other end of the torsion spring 6012 is fixedly connected to the fixed connecting sleeve 301. The starting control component 6 also includes: an elastic steel sheet 602 and a limit switch 603. The elastic steel sheet 602 is fixedly mounted on the bottom of the rotating arm 601. The bottom end of the elastic steel sheet 602 is lower than the conductive nozzle 203. The limit switch 603 is fixedly mounted on the fixed connecting sleeve 301. The rotating arm 601 presses against the pressing end of the limit switch 603. The welding torch 202 is electrically connected to the welding machine power supply via switch 603. The starting point control component 6 guides the operator to avoid the spot welding positioning point when welding deep bevel circumferential seams, maintaining weld accuracy. This prevents the spot welding positioning point from melting due to the high temperature at the moment of arc initiation when the arc initiation position is directly at the spot welding positioning point. Under the pressure of the pipe clamping structure, one of the three spot welding positioning points at the weld may be instantly lost, causing the weld to shrink and directly affecting the weld formation quality. This structure utilizes the elastic steel sheet 602 to quickly detect the spot welding positioning point and provides guidance in conjunction with the limit switch 603. The elastic structure of the elastic steel sheet 602 allows for flexible bending and adaptation to the arc welding of the welding torch 202.
[0036] Working principle: When welding is required, the welding mounting plate 101 is first installed on the automatic welding machine bracket with bolts. Then, the pre-spot-welded and positioned blank is placed on the clamping structure of the automatic welding machine. Subsequently, the automatic welding machine controls the falling height of the welding torch 202 and adjusts the welding wire distance. At this time, the two limiting rings 3041 are inserted into the weld bevel. The electromagnet 303 is controlled to conduct electromagnetic attraction to the outer wall of the welding pipe. Through magnetic attraction, the two limiting rings 3041 are stably inserted into the weld bevel. At the same time, the elastic steel sheet 602 is also inserted into the weld. At this time, the pipe needs to be driven to rotate. The spot welding positioning points on the pipe rotate with the pipe. When any spot welding positioning point is close to the elastic steel sheet 602, it can squeeze and move the elastic steel sheet. The steel sheet 602 drives the rotating arm 601 to rotate. At this time, the torsion spring 6012 is compressed and twisted. The rotating arm 601 no longer presses the limit switch 603. The limit switch 603 can normally control the welding machine connected to the welding torch 202 to start. At this time, the end of the welding torch 202 is also misaligned with the spot welding positioning point. Only then can circumferential welding be performed normally. This reminds the workers to stagger the spot welding positioning point to avoid direct and arbitrary arc welding. During the rotation of the welding pipe, the welding torch 202 feeds the welding wire in real time and guides the welding wire to be fed out concentrically through the guide frame 503. The two limit rings 3041 roll and fit against the weld bevel in real time, guiding the welding torch 202 and keeping the welding torch 202 aligned with the center of the weld. The mounting sliders 201 on the two guide shafts 102 can cooperate with the adapter springs 103 on both sides to achieve sliding adaptation. When the automatic welding machine bracket has errors or vibrations, the two limit rings 3041 can be kept in rolling guide limit at the weld bevel. If, during the actual welding process, as the cover thickness increases, oscillating arc welding is required, since the welding torch 202 needs to oscillate at the weld, its oscillation range can be adapted by adjusting the oscillation adjustment component 4. The specific adjustment method is as follows: First, rotate the adjusting screw 401 to drive the limit plug 402 to move outward. At this time, the ball bearings at the end of the limit plug 402 no longer roll against the inner side of the adapter groove 3042. At this time, the two sides of the limit plug 402 and the adapter groove 3042 are closed. There will be a gap, ensuring that while the guide wheel 304 rotates, the support arm 302 can also move axially on the guide wheel 304, without centering limit, so as to adapt to the swing distance of the welding torch 202 during arc welding. The outward displacement of the limit block 402 is adjusted according to the swing arc range, and then the anti-loosening bolt 305 is rotated so that its end is inserted into the positioning hole 4011, and the adjusting screw 401 is locked. The structural adjustment is simple and convenient, ensuring the adaptability and forming quality of arc welding. As welding progresses, the elastic steel sheet 602 will remain stopped at the weld seam, keeping the elastic steel sheet 602 driving the rotating arm 601 in a state of rotational expansion, without squeezing the limit switch 603, so welding can proceed normally.
[0037] As welding progresses, after each circumferential weld is completed, the positioning bolt 502 can be loosened first, and then the guide sliding sleeve 501 can be slid upward to move the guide frame 503 upward and adjust its height. Then the positioning bolt 502 can be tightened so that the end of the positioning bolt 502 abuts against the outer wall of the conductive nozzle 203, and the positioning guide sliding sleeve 501 is positioned.
[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A welded pipe seam tracking welding device, comprising a welding mounting component, wherein a welding part is mounted on the welding mounting component; the welding part is used for circumferential seam welding, characterized in that: A weld guide is installed on the welding section; an arc adjustment component is installed on the weld guide. A welding wire guide is installed on the welding section; a starting point control element is installed on the weld guide. The welding mounting component includes a welding mounting plate and guide slides, with two guide slides fixedly mounted on the welding mounting plate.
2. The weld seam tracking welding device for welded pipes according to claim 1, characterized in that: The welding mounting component further includes: adapter springs, with two adapter springs respectively sleeved on the two guide slide shafts; the ends of the two front adapter springs are respectively fixedly connected to the guide slide shafts; and the ends of the two rear adapter springs are respectively fixedly connected to the welding mounting plate.
3. The weld seam tracking welding device for welded pipes according to claim 2, characterized in that: The welding part includes: a mounting slider, a welding gun, a conductive nozzle, and a guide groove. The mounting slider is slidably mounted on two guide shafts. Two adapter springs on the two guide shafts are located on both sides of the mounting slider. A welding gun is fixedly mounted on the mounting slider. A conductive nozzle is fixedly mounted on the end of the welding gun, and a guide groove is formed on the conductive nozzle. The welding gun is connected to an external welding machine.
4. The weld seam tracking welding device for welded pipes according to claim 3, characterized in that: The weld guide includes: a fixed connecting sleeve, a support arm, and an electromagnet. The fixed connecting sleeve is fixedly sleeved on the welding torch. The support arm is fixedly installed on the fixed connecting sleeve. The support arm is aligned with the welding torch. The electromagnet is fixedly installed on the support arm via a bracket.
5. The weld seam tracking welding device for welded pipes according to claim 4, characterized in that: The weld guide also includes: a guide wheel, a limiting ring, an adapter groove, and an anti-loosening bolt. The guide wheel is rotatably sleeved on the bottom end of the support arm. Limiting rings are fixedly installed at both ends of the guide wheel, and the two limiting rings are used to roll and fit against the inner side of the weld pipe bevel. An adapter groove is provided on the guide wheel, and the adapter groove is a V-shaped groove. The adapter groove is located in the middle of the guide wheel. An anti-loosening bolt is threaded onto the support arm.
6. The weld seam tracking welding device for welded pipes according to claim 5, characterized in that: The swing adjustment component includes: an adjusting screw, a positioning hole, and a limiting block. The adjusting screw is rotatably mounted on the support arm. A ring of positioning holes is formed on the adjusting screw. The end of the anti-loosening bolt is inserted into the positioning hole. The limiting block is slidably inserted into the support arm. The adjusting screw is threadedly connected to the limiting block. The two sides of the end of the limiting block have a beveled structure. Ball bearings are embedded in the end and both sides of the limiting block. The ball bearings at the end of the limiting block roll and fit against the inner side of the adapter groove.
7. The weld seam tracking welding device for welded pipes according to claim 3, characterized in that: The welding wire guide includes a guide sliding sleeve and positioning bolts. The guide sliding sleeve is slidably sleeved on the conductive nozzle. Two positioning bolts are threadedly connected to the guide sliding sleeve, and the ends of the two positioning bolts are respectively pressed and fitted against the outside of the conductive nozzle. A raised strip is provided on the inner side of the guide sliding sleeve, and the raised strip on the inner side of the guide sliding sleeve is slidably installed in a guide groove.
8. The weld seam tracking welding device for welded pipes according to claim 7, characterized in that: The welding wire guide further includes: a guide frame, which is fixedly installed on the guide sliding sleeve, and the guide frame has an L-shaped structure; the guide frame has a through hole, through which the welding wire passes; the through hole on the guide frame is concentric with the conductive nozzle.
9. A weld seam tracking welding device for welded pipes according to claim 4, characterized in that: The starting control component includes: a rotating arm, a rotary shaft, and a torsion spring. The rotary shaft is fixedly mounted on the rotating arm and rotatably mounted on a fixed connecting sleeve. A torsion spring is sleeved on the rotary shaft. One end of the torsion spring is fixedly connected to the rotary shaft, and the other end of the torsion spring is fixedly connected to the fixed connecting sleeve.
10. A weld seam tracking welding device for welded pipes according to claim 9, characterized in that: The starting point control component also includes: an elastic steel sheet and a limit switch. The elastic steel sheet is fixedly installed at the bottom of the rotating arm. The bottom end of the elastic steel sheet is lower than the conductive nozzle. The limit switch is fixedly installed on the fixed connecting sleeve. The rotating arm is pressed against the pressing end of the limit switch. The limit switch is electrically connected to the welding machine power supply connected to the welding torch.