Welding equipment for steel pipe pole machining

Abstract

The invention relates to the technical field of steel pipe pole welding machining, in particular to welding equipment for steel pipe pole machining. The welding equipment comprises an equipment body, a connecting piece is used for supporting a welding structure, the welding structure comprises a transfer welding mechanism, and when a steel pipe rod needing to be welded is inserted into the outer portion of the transfer welding mechanism, a positioning mechanism can conduct auxiliary positioning on steel pipe welding; and when the transfer welding mechanism is used for welding the steel pipe pole, the positioning mechanism is driven by the transfer welding mechanism to promote discharge of airflow generated by welding. The welding rod is driven by the transfer welding shaft to achieve rapid winding welding, an inner pipe of a pipeline can be heated more evenly in the circumferential direction, the quality and uniformity of a weld joint are improved, the inner wall of the pipeline can be polished and welded in combination with the friction plate and the shovel head installed at the end of the positioning wall, the surface of the weld joint is smoother, and the welding quality is improved. Stress concentration is reduced, and the sealing performance and durability of welding are improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe rod welding processing, in particular to a welding device used for steel pipe rod processing. Background Art

[0002] In some specific scenarios, short round tubes are used for transportation. For example, in the gas transmission pipeline system of precision instruments, due to the limitations of the overall space layout and the specific gas transmission path requirements, thick-walled short-tube steel pipe rods are required for connection. The short-tube connection must ensure strict sealing to prevent gas leakage from affecting the normal operation and measurement accuracy of the instrument. Due to the strict requirements on sealing in these scenarios, internal welding is usually used for short-tube connection;

[0003] Internal welding can improve welding sealing, mainly because internal welding can make the weld more uniform and continuous, reduce defects such as irregular welds and pores that may occur in external welding, effectively prevent gas or liquid leakage, and welding inside the pipeline can better control the shape and size of the molten pool, ensure that the weld is tightly combined with the inner wall of the pipeline, and improve the sealing performance;

[0004] However, since welding is done inside the pipeline, the thermal stress generated by welding is difficult to control. The high temperature during welding will cause the pipeline material to expand thermally, and then shrink after cooling. This uneven thermal expansion and contraction will cause thermal stress. If the thermal stress cannot be effectively balanced, it is easy to cause cracks in the weld, thereby reducing the sealing performance. In addition, the gas temperature generated by welding inside the pipeline is relatively high and difficult to dissipate. If these gases are not easy to discharge, on the one hand, it will affect the welding quality and easily cause defects such as pores in the weld; on the other hand, the accumulation of high-temperature gas in the pipeline will increase the internal pressure of the pipeline, increase the risk of pipeline rupture, and further affect the sealing performance and safety.

[0005] In view of this, we propose a welding device for steel pipe rod processing. Summary of the invention

[0006] The object of the present invention is to provide a welding device for steel pipe rod processing to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides a welding device for processing steel pipe rods, including a device body, the device body including a welding platform, frame members are fixedly connected to the tops of both sides of the welding platform, a welding bin is formed between the two frame members and the welding platform, a connecting member is installed at one end of the welding bin, and the connecting member is used to provide support for the welding structure;

[0008] The welding structure includes a transfer welding mechanism, which is used for rotating welding of the inner wall of the pipeline. A positioning mechanism is movably connected to a side of the transfer welding mechanism away from the connecting piece. When a steel pipe rod to be welded is inserted outside the transfer welding mechanism, the positioning mechanism can assist in positioning the steel pipe welding.

[0009] The end of the positioning mechanism away from the transfer welding mechanism is fixedly connected to a plate-attaching mechanism. When the transfer welding mechanism welds the steel pipe rod, the plate-attaching mechanism can generate heat by friction at the symmetrical parts of the welding point to balance the thermal stress in the welding pipe. At the same time, the positioning mechanism, driven by the transfer welding mechanism, can also promote the discharge of airflow generated by welding.

[0010] As a further improvement of the present technical solution, the rotary welding mechanism includes a bent pipe member fixedly connected to the bottom of the fixed connecting member, a rotary welding shaft is provided inside the bent pipe member for rotation, one end of the rotary welding shaft close to the bent pipe member is coaxially connected to the motor, the bent pipe member provides rotation support for the rotary welding shaft, and the end of the rotary welding shaft away from the bent pipe member is movably connected to a welding rod.

[0011] As a further improvement of the technical solution, the positioning mechanism includes an adjustment chamber opened inside the end of the rotary welding shaft away from the bent pipe piece, the inside of the adjustment chamber is fixedly connected to two side plates, a middle cavity is formed between the two side plates, the welding rod is located inside the middle cavity on one side close to the bent pipe piece, a driving gear is rotatably provided in the middle of the middle cavity, the driving gear is coaxially connected to the micro motor, and the micro motor is fixedly mounted on the surface of one of the side plates;

[0012] A positioning arm is slidably provided at one end of the middle cavity away from the welding rod, and the positioning arm and the upper and lower ends of the welding rod extend out of the surface of the rotating welding shaft. The positioning arm and the end of the welding rod close to the driving gear are both provided with tooth grooves, and the two tooth grooves are meshed with the driving gear.

[0013] As a further improvement of the technical solution, the plate-attaching mechanism includes a friction plate fixedly connected to the end of the positioning arm, the friction plate is located at the end of the positioning arm away from the welding rod, one end of the friction plate is fixedly connected to a shovel head, and the shovel head includes a fitting shovel and a lifting shovel;

[0014] The laminating shovel is flush with the end of the friction plate away from the positioning arm, and the lifting shovel is flush with the end of the friction plate close to the positioning arm. The width of the lifting shovel is greater than that of the laminating shovel.

[0015] As a further improvement of the technical solution, a push angle is fixedly connected to one side of the friction plate close to the bending pipe, and the surface of the push angle is in an inclined state.

[0016] As a further improvement of the present technical solution, two fixing rods are fixedly connected to the inner walls on both sides of the central cavity, and the four fixing rods are fixedly connected to a clamping arm on one side close to the middle of the central cavity. The two adjacent clamping arms cooperate with each other to clamp and fix the welding rod and the positioning arm respectively.

[0017] As a further improvement of the technical solution, the four clamping arms are fixedly connected to inner pads on one side away from the fixing rod, and the four inner pads are all made of elastic material with a rough surface.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the welding equipment for processing steel pipe rods, when two short steel pipe rods need to be welded, one of the steel pipe rods is first sleeved on the surface of the transfer welding mechanism, and the interface of the steel pipe rod to be welded is aligned with the welding rod, so as to realize the positioning of the steel pipe rod. After the two steel pipe rods are butt-jointed and positioned, the driving gear of the positioning mechanism is used to control the positioning arm to slide to a state of being in contact with the inner wall of the steel pipe rod. At this time, there is a certain gap between the transfer welding shaft and the welding point, which can achieve the function of positioning the transfer welding shaft. At the same time, the fit of the positioning arm and the inner wall of the steel pipe rod can provide support during the welding process, thereby achieving the effect of stress balance.

[0020] 2. In the welding equipment for steel pipe rod processing, the welding rod is driven by the rotating welding shaft to realize rapid circumferential welding, so that the inner pipe of the pipeline can be heated more evenly in the circumferential direction, and the quality and uniformity of the weld can be improved. Combined with the friction plate and shovel head installed at the end of the positioning wall, the inner wall of the pipeline can be polished and welded, making the weld surface smoother and reducing stress concentration, and improving the sealing and durability of the welding;

[0021] 3. In the welding equipment used for steel pipe rod processing, since the positioning arm and the welding rod are symmetrically arranged, driven by the rotating welding shaft, the positioning arm and the welding rod can rotate quickly inside the pipe, and the airflow disturbance generated by the rotation helps to break the gas stagnation near the welding area, so that the gas generated by welding can flow more smoothly to the pipe outlet, thereby reducing the accumulation of harmful gases generated during the welding process in the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 A schematic diagram of the structure at A;

[0024] Figure 3 It is a schematic diagram of the internal welding structure of the steel pipe rod of the present invention;

[0025] Figure 4A side view of the welding process of the present invention;

[0026] Figure 5 It is a schematic diagram of the welding rod adjustment structure of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the transfer welding mechanism of the present invention;

[0028] Figure 7 It is a schematic diagram of the cross-sectional structure of the regulating bin of the present invention.

[0029] The meaning of each number in the figure is:

[0030] 1. Equipment body; 11. Frame parts; 12. Welding platform; 13. Welding chamber; 14. Connectors;

[0031] 2. Welding structure; 21. Transfer welding mechanism; 22. Positioning mechanism; 23. Plate pasting mechanism;

[0032] 211, bent pipe; 212, rotary welding shaft; 213, welding rod;

[0033] 221, adjustment chamber; 222, positioning arm; 223, tooth groove; 224, middle cavity; 225, side plate; 226, driving gear;

[0034] 231, friction plate; 232, shovel head; 2321, fitting shovel; 2322, lifting shovel;

[0035] 3. Push the corner;

[0036] 4. Fixing rod; 41. Clamping arm;

[0037] 5. Inner pad. DETAILED DESCRIPTION

[0038] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] For examples, see Figure 1 and Figure 2As shown, the purpose of this embodiment is to provide a welding device for steel pipe rod processing, including a device body 1, the device body 1 includes a welding platform 12, the tops of both sides of the welding platform 12 are fixedly connected with frame members 11, a welding chamber 13 is formed between the two frame members 11 and the welding platform 12, one end of the welding chamber 13 is installed with a connecting member 14, the connecting member 14 is used to provide support for the welding structure 2; the welding structure 2 includes a rotating welding mechanism 21, the rotating welding mechanism 21 is used to perform rotational welding on the inner wall of the pipeline, and the rotating welding mechanism 21 is away from A positioning mechanism 22 is movably connected to one side of the connecting piece 14. When the steel pipe rod to be welded is inserted into the outside of the transfer welding mechanism 21, the positioning mechanism 22 can assist in positioning the steel pipe weld; the positioning mechanism 22 is fixedly connected to a plate-attaching mechanism 23 at one end away from the transfer welding mechanism 21. When the transfer welding mechanism 21 welds the steel pipe rod, the plate-attaching mechanism 23 can generate heat by friction at the symmetrical part of the welding point to balance the thermal stress in the welding pipeline. At the same time, the positioning mechanism 22, driven by the transfer welding mechanism 21, can also promote the discharge of airflow generated by welding.

[0040] In order to further improve the welding sealing, it is necessary to perform inner wall welding connection on the short steel pipe rod. Due to the circular structure of the inner diameter of the steel pipe rod, it is necessary to realize rotational welding through a rotation welding mechanism 21. The rotation welding mechanism 21 includes a bent pipe member 211 fixedly connected to the bottom of the fixed connecting member 14. The internal rotation of the bent pipe member 211 is provided with a rotation welding shaft 212. The end of the rotation welding shaft 212 close to the bent pipe member 211 is coaxially connected to the motor. The bent pipe member 211 provides rotation support for the rotation welding shaft 212, and the end of the rotation welding shaft 212 away from the bent pipe member 211 is movably connected to a welding rod 213.

[0041] See also Figure 3 and Figure 6 As shown, the bent pipe member 211 fixedly installed at the bottom end of the connecting member 14 can provide support for the rotary welding shaft 212, and the rotary welding shaft 212 is movably installed inside the bent pipe member 211. One end of the rotary welding shaft 212 is fixedly connected to the output shaft of the motor, and the other end is movably connected to the welding rod 213. When the steel pipe rod needs to be welded, the motor is started to drive the rotary welding shaft 212 fixedly connected to the output shaft of the motor to rotate inside the steel pipe rod, thereby driving the welding rod 213 to perform rapid circular welding. Compared with uniform speed welding, rapid circular welding can make the inner pipe of the pipeline more evenly heated in the circumferential direction, reduce local overheating or insufficiently heated areas, thereby improving the quality and uniformity of the weld. Each circular welding is equivalent to a certain degree of remelting and repairing of the previous weld, which can further increase the penetration depth of the weld, ensure better fusion between the weld and the pipeline parent material, and improve the sealing and strength of the welding. At the same time, rapid circular welding can complete more welding tasks in a shorter time and improve production efficiency.

[0042] It should be noted that the rotation speed of the rotating welding shaft 212 can be adjusted according to the inner diameter of the welded steel pipe rod. The larger the inner diameter, the slower the rotation speed needs to be. This is because within a larger circumferential range, high-speed rotation makes it difficult to ensure that each part can receive uniform heat input and welding treatment. Reducing the rotation speed helps ensure that the welding rod 213 has enough time to fully weld each part in the steel pipe rod with a relatively large inner diameter, thereby improving the welding quality and sealing.

[0043] Among them, the welding rod 213 adopts plasma arc welding technology, and its connecting pipe can be connected from the inside of the rotating welding shaft 212. It is worth noting that: when plasma arc welding is performed, a certain gap needs to be maintained with the welding position. This is because plasma arc welding is a high-energy density welding method that melts and connects metal materials by generating high-temperature plasma. If there is no gap between the welding rod 213 and the welding position, the plasma arc may directly contact the workpiece, resulting in excessive melting, burn-through or other welding defects. Maintaining an appropriate gap can control the energy input of the plasma arc, making the welding process more stable and controllable. At the same time, the gap can also allow the gas and slag generated by welding to be discharged smoothly, thereby improving the welding quality.

[0044] Since the welding rod 213 adopts plasma arc welding technology, the welding rod 213 needs to have a certain gap with the welding position. Therefore, the position of the welding rod 213 needs to be assisted by the positioning mechanism 22. The positioning mechanism 22 includes an adjustment chamber 221 opened inside the end of the rotating welding shaft 212 away from the bending pipe 211. The inside of the adjustment chamber 221 is fixedly connected to two side plates 225. A middle cavity 224 is formed between the two side plates 225. The welding rod 213 is located inside the middle cavity 224 on one side close to the bending pipe 211. A driving gear 226 is rotatably provided in the middle of the middle cavity 224. The driving gear 226 is coaxially connected to the micro motor, and the micro motor is fixedly installed on the surface of one of the side plates 225.

[0045] A positioning arm 222 is slidably provided at one end of the middle cavity 224 away from the welding rod 213, and the upper and lower ends of the positioning arm 222 and the welding rod 213 extend out of the surface of the rotating welding shaft 212. The positioning arm 222 and the end of the welding rod 213 close to the driving gear 226 are both provided with tooth grooves 223, and the two tooth grooves 223 are both engaged with the driving gear 226.

[0046] See also Figure 2The welding rod 213 slides in the adjustment chamber 221 opened at the end of the rotating welding shaft 213, and the interior of the adjustment chamber 221 is fixedly connected with two side plates 225, and a driving gear 226 is rotatably arranged inside the middle cavity 224 formed inside the two side plates 225. The welding rod 213 and the end of the positioning arm 222 located at the side end of the driving gear 226 are both provided with tooth grooves 223 that mesh with the surface of the driving gear 226 (the tooth grooves 223 are opened in the middle, which effectively avoids the situation where the welding rod 213 and the positioning arm 222 are separated from the driving gear 226). Figure 5 As shown, based on the transmission principle of the driving gear 226, when the driving gear 226 is driven by the wireless micro motor to rotate, the gear teeth of the driving gear 226 interact with the tooth grooves 223 opened on the side walls of the welding rod 213 and the positioning arm 222 to generate thrust and pull. Since the gear teeth on both sides of the driving gear 226 are symmetrically distributed and mesh with the tooth grooves 223 on both sides at the same time, when the driving gear 226 rotates, the welding rod 213 and the positioning arm 222 will be subjected to forces of equal magnitude and opposite directions, thereby running in the opposite directions at the same time;

[0047] Among them, the length from the long end of the positioning arm 222 to the rotating welding shaft 212 is greater than the length from the long end of the welding rod 213 to the rotating welding shaft 212. When the driving gear 226 is running, the end of the positioning arm 222 will first fit against the inner wall of the steel pipe rod, and it can be observed from the side opening of the short steel pipe rod. The short tube length will not affect the observation result. Then the micro motor is controlled according to the observation result. When the positioning arm 222 fits against the inner wall of the steel pipe rod, there is a certain gap between the welding rod 213 and the inner wall of the steel pipe rod, thereby achieving the effect of positioning the welding rod 213.

[0048] like Figure 4 As shown, the welding rod 213 and the positioning arm 222 are symmetrically arranged. When the rotating welding shaft 212 drives the welding rod 213 and the positioning arm 222 to rotate inside the steel pipe rod, the positioning arm 222 and the welding rod 213 can rotate quickly inside the pipeline. During this process, the airflow generated by the rotation helps to break the stagnant state of the gas near the welding area, so that the gas generated by the welding can flow more smoothly to the pipeline outlet. In this way, the accumulation of harmful gases generated during the welding process in the pipeline can be reduced, which is conducive to creating a relatively stable welding environment and improving the efficiency and quality of welding.

[0049] It should be noted that in this embodiment, the inner radius of the thick-walled short pipe suitable for welding needs to be smaller than the size of the positioning arm 222, and the length of the thick-walled short pipe suitable for welding needs to be smaller than the distance between the bending pipe 211 and the welding rod 213.

[0050] Finally, the specific structure of the plate attaching mechanism 23 is disclosed. The plate attaching mechanism 23 includes a friction plate 231 fixedly connected to the end of the positioning arm 222. The friction plate 231 is located at one end of the positioning arm 222 away from the welding rod 213. One end of the friction plate 231 is fixedly connected to a shovel head 232. The shovel head 232 includes a fitting shovel 2321 and a lifting shovel 2322.

[0051] The laminating shovel 2321 is flush with the end of the friction plate 231 away from the positioning arm 222 , and the lifting shovel 2322 is flush with the end of the friction plate 231 close to the positioning arm 222 , and the width of the lifting shovel 2322 is greater than the width of the laminating shovel 2321 .

[0052] See also Figure 6 As shown, the friction plate 231 is installed at one end of the positioning arm 222 away from the welding rod 213, and the bottom end of the friction plate 231 is flush with the bottom end of the positioning arm 222. Figure 4 When the positioning arm 222 fits against the inner wall of the steel pipe rod, the end of the friction plate 231 will also fit therewith. Since the friction plate 231 is relatively wide, when the positioning arm 222 rotates with the rotating welding shaft 212, the friction plate 231 will rotate accordingly, and rub at the connection between the two welded steel pipe rods to achieve the effect of grinding and welding the inner wall of the pipe. The function of the friction plate 231 can not only make the weld surface smoother and improve the appearance quality of the welding, but also generate heat through friction and reduce stress concentration. Specifically, frictional heat can increase the temperature of the metal material near the weld, thereby improving its plasticity and fluidity, which is beneficial to the fusion and crystallization of the weld, and improving the strength and sealing of the weld. At the same time, reducing stress concentration can reduce the risk of cracks and fractures in the weld during use, thereby extending the service life of the steel pipe rod.

[0053] Combination Figure 4 As shown, the rotating front end of the friction plate 231 is fixedly connected with a shovel head 232, see Figure 6 The shovel head 232 is composed of a fitting shovel 2321 and a lifting shovel 2322. During the welding process, a bump is easily formed due to the splashing of sparks. If the bump is high, the top end can be scraped off by the lifting shovel 2322, and then the bottom end can be scraped off by the fitting shovel 2321. The double shovel structure helps to improve the scraping effect. At the same time, the lifting shovel 2322 can also play a role in heat insulation when the fitting shovel 2321 and the friction plate 231 generate heat by friction on the inner wall of the pipeline, which can make the friction heat generation effect more lasting, help reduce stress concentration, improve welding quality and stability, and extend the service life of the pipeline.

[0054] The shovel head 232 can be used to remove the bumps generated by flying sparks during welding, and the removed impurities are likely to remain on the inner wall of the steel pipe rod. Therefore, in order to facilitate the discharge of impurities, the friction plate 231 is fixedly connected to the side close to the bending pipe 211 with a push angle 3, and the surface of the push angle 3 is inclined.

[0055] The improvement lies in: combining Figure 3 As shown, when the welded steel pipe rod slides out from the side of the welding chamber 13 away from the connecting piece 14, the push angle 3 on the friction plate 231 can scrape the impurities on the inner wall of the front section of the steel pipe rod, effectively remove the impurities remaining on the inner wall of the steel pipe rod due to the welding process, and maintain the cleanliness of the inner wall of the steel pipe rod; wherein: Figure 3 The dotted arrow in the figure indicates the sliding direction of the steel pipe rod after welding. Figure 3 The solid arrow in shows the scraping direction of the push angle 3.

[0056] Taking into account the fixing conditions of the welding rod 213 and the positioning arm 222, in order to further improve the fixing effect of the welding rod 213 and the positioning arm 222, two fixing rods 4 are fixedly connected to the inner walls on both sides of the middle cavity 224, and the four fixing rods 4 are fixedly connected to one side close to the middle of the middle cavity 224 with a clamping arm 41. The two adjacent clamping arms 41 cooperate with each other to clamp and fix the welding rod 213 and the positioning arm 222 respectively.

[0057] The improvement is: Figure 7 As shown, the adjacent fixing rods 4 and the clamping arms 41 are combined with each other to clamp and fix the welding rod 213 and the positioning arm 222, ensuring that the welding rod 213 maintains an accurate position and a stable state during the welding operation, thereby improving the welding accuracy and quality. At the same time, the stable clamping and fixing can also reduce the welding deviation caused by vibration or external force interference during the welding process, providing reliable protection for the entire welding process, wherein, Figure 7 The dotted arrow in the figure indicates the clamping direction after the adjacent fixing rods 4 cooperate with the clamping arms 41.

[0058] Since the welding rod 213 and the positioning arm 222 need to slide inside the clamping arm 41 when adjusting their position, in order to reduce the sliding friction between the clamping arm 41 and the welding rod 213 and the positioning arm 222, the four clamping arms 41 are fixedly connected to the side away from the fixed rod 4 with an inner pad 5, and the four inner pads 5 are all made of elastic material with a rough surface.

[0059] The improvements are as follows: the elastic inner pad 5 with a rough surface can increase the friction between the welding rod 213 and the positioning arm 222, and to a certain extent reduce their accidental movement when sliding is not required, thereby ensuring the position stability during the welding process. The elastic material can play a buffering role when the clamping arm 41 clamps and fixes the welding rod 213 and the positioning arm 222, avoiding damage to the welding rod 213 and the positioning arm 222 due to excessive clamping. At the same time, reducing sliding friction can make the welding rod 213 and the positioning arm 222 smoother when adjusting the position, improve the convenience and efficiency of operation, and reduce the heat and wear generated by friction. Among them, the inner pad 5 is preferably made of rubber material with a rough surface.

[0060] In summary, the working principle of this solution is as follows: first, when two short steel pipe rods need to be welded, one of the steel pipe rods is first sleeved on the surface of the rotating welding shaft 212, and the interface of the steel pipe rod to be welded is aligned with the welding rod 212, so as to achieve the positioning of the steel pipe rod, and then the other steel pipe rod to be welded is aligned and the outer walls of the two steel pipe rods are fixed;

[0061] Subsequently, the wireless micro-motor is started to drive the driving gear 226 to start. At this time, the staff can observe from the side of the steel pipe rod that the gear teeth of the driving gear 226 interact with the tooth grooves 223 opened on the side walls of the welding rod 213 and the positioning arm 222 to generate thrust and tension, driving the welding rod 213 and the positioning arm 222 to slide in the opposite direction. Since the length from the long end of the positioning arm 222 to the rotating welding shaft 212 is greater than the length from the long end of the welding rod 213 to the rotating welding shaft 212, when the driving gear 226 is running, the end of the positioning arm 222 will first fit the inner wall of the steel pipe rod. The micro-motor is controlled according to the observation results. When the positioning arm 222 fits the inner wall of the steel pipe rod, there is a certain gap between the welding rod 213 and the inner wall of the steel pipe rod, thereby achieving the effect of positioning the welding rod 213. At the same time, the end of the friction plate 231 flush with the bottom end of the positioning arm 222 will also fit the inner wall of the pipe accordingly.

[0062] Then, the rotation speed of the rotating welding shaft 212 is adjusted according to the inner diameter size of the steel pipe rod, and the welding rod 213 is driven to perform fast circular welding. When the rotating welding shaft 212 drives the welding rod 213 and the positioning arm 222 to rotate inside the steel pipe rod, the positioning arm 222 and the welding rod 213 can rotate quickly inside the pipe. In this process, the airflow generated by the rotation helps to break the stagnant state of the gas near the welding area, so that the gas generated by the welding can flow more smoothly to the pipe outlet. In this way, the accumulation of harmful gases generated during the welding process in the pipe can be reduced, which is conducive to creating a relatively stable welding environment and improving the efficiency and quality of welding.

[0063] As the positioning arm 222 rotates with the rotating welding shaft 212, the friction plate 231 will rotate accordingly, rubbing at the connection between the two welded steel pipe rods to achieve the effect of grinding and welding the inner wall of the pipe. The friction plate 231 can not only make the weld surface smoother and improve the appearance quality of the weld, but also generate heat through friction and reduce stress concentration. Specifically, frictional heat can increase the temperature of the metal material near the weld, thereby improving its plasticity and fluidity, which is beneficial to the fusion and crystallization of the weld, and improving the strength and sealing of the weld. At the same time, reducing stress concentration can reduce the risk of cracks and breakages in the weld during use, thereby extending the service life of the steel pipe rod.

[0064] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A welding device for processing steel pipe rods, comprising a device body (1), wherein the device body (1) comprises a welding platform (12), the tops of both sides of the welding platform (12) are fixedly connected with frame members (11), and a welding chamber (13) is formed between the two frame members (11) and the welding platform (12), characterized in that: A connecting piece (14) is installed at one end of the welding bin (13), and the connecting piece (14) is used to provide support for the welding structure (2); The welding structure (2) comprises a transfer welding mechanism (21), the transfer welding mechanism (21) is used to perform rotational welding on the inner wall of the pipeline, and a positioning mechanism (22) is movably connected to a side of the transfer welding mechanism (21) away from the connecting piece (14), and when a steel pipe rod to be welded is inserted outside the transfer welding mechanism (21), the positioning mechanism (22) can assist in positioning the steel pipe weld; One end of the positioning mechanism (22) away from the transfer welding mechanism (21) is fixedly connected to a plate-attaching mechanism (23). When the transfer welding mechanism (21) welds the steel pipe rod, the plate-attaching mechanism (23) can generate heat by friction at the symmetrical part of the welding point to balance the thermal stress in the welding pipe. At the same time, the positioning mechanism (22), driven by the transfer welding mechanism (21), can also promote the discharge of airflow generated by welding.

2. The welding equipment for steel pipe rod processing according to claim 1, characterized in that: The rotary welding mechanism (21) comprises a bent pipe member (211) fixedly connected to the bottom of the fixed connecting member (14); a rotary welding shaft (212) is rotatably arranged inside the bent pipe member (211); one end of the rotary welding shaft (212) close to the bent pipe member (211) is coaxially connected to a motor; the bent pipe member (211) provides rotation support for the rotary welding shaft (212); and one end of the rotary welding shaft (212) away from the bent pipe member (211) is movably connected to a welding rod (213).

3. The welding equipment for steel pipe rod processing according to claim 2, characterized in that: The positioning mechanism (22) comprises an adjustment chamber (221) disposed inside an end of the rotary welding shaft (212) away from the bent pipe member (211); two side plates (225) are fixedly connected inside the adjustment chamber (221); a middle cavity (224) is formed between the two side plates (225); the welding rod (213) is located inside a side of the middle cavity (224) close to the bent pipe member (211); a driving gear (226) is rotatably disposed in the middle of the middle cavity (224); the driving gear (226) is coaxially connected to a micro motor, and the micro motor is fixedly mounted on the surface of one of the side plates (225); A positioning arm (222) is slidably provided at one end of the middle cavity (224) away from the welding rod (213); the upper and lower ends of the positioning arm (222) and the welding rod (213) extend out of the surface of the rotary welding shaft (212); the positioning arm (222) and one end of the welding rod (213) close to the driving gear (226) are provided with tooth grooves (223); the two tooth grooves (223) are meshed with the driving gear (226).

4. The welding equipment for steel pipe rod processing according to claim 3, characterized in that: The plate-applying mechanism (23) comprises a friction plate (231) fixedly connected to the end of the positioning arm (222), the friction plate (231) being located at one end of the positioning arm (222) away from the welding rod (213), one end of the friction plate (231) being fixedly connected to a shovel head (232), the shovel head (232) comprising a fitting shovel (2321) and a lifting shovel (2322); The laminating shovel (2321) is flush with the end of the friction plate (231) away from the positioning arm (222), and the lifting shovel (2322) is flush with the end of the friction plate (231) close to the positioning arm (222), and the width of the lifting shovel (2322) is greater than the width of the laminating shovel (2321).

5. The welding equipment for steel pipe rod processing according to claim 4, characterized in that: A push angle (3) is fixedly connected to one side of the friction plate (231) close to the curved pipe member (211), and the surface of the push angle (3) is in an inclined state.

6. The welding equipment for steel pipe rod processing according to claim 3, characterized in that: Two fixing rods (4) are fixedly connected to the inner walls on both sides of the middle cavity (224); one side of the four fixing rods (4) close to the middle of the middle cavity (224) is fixedly connected to a clamping arm (41); two adjacent clamping arms (41) cooperate with each other to clamp and fix the welding rod (213) and the positioning arm (222) respectively.

7. The welding equipment for steel pipe rod processing according to claim 6, characterized in that: The four clamping arms (41) are fixedly connected to an inner pad (5) on one side away from the fixing rod (4), and the four inner pads (5) are all made of elastic material with a rough surface.

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