Strip steel welding and weld recognition sorting system

Abstract

The present application provides a strip steel welding and weld seam identification sorting system, a welding unit is used for welding the coiled strip steel, a pre-welding shaping unit is arranged at the front end of the welding unit, a welding scar shaping unit is arranged at the rear end of the welding unit, the pre-welding shaping unit is used for holding the coiled strip steel, so that the gap between the two sides of the coiled strip steel is stable, and the welding unit is used for welding the two sides of the strip steel to form a straight seam welded pipe. The strip steel welding and weld seam identification sorting system can hold the coiled strip steel before welding, ensure the relative position of the strip steel, and ensure the stable gap between the two sides of the strip steel, and the welding unit remains in a fixed position, so as to ensure the stability of the welding scar, and the welding scar shaping unit can make intermittent indentation on the welding scar, so that the welding scar is broken along the indentation when turning by the welding scar turning unit, avoiding the problem that the welding scar strip is rolled for a long time and cannot be separated from the welded pipe, and the labor intensity of workers can be reduced.

Description

Technical Field

[0001] This invention belongs to the field of straight seam welded pipe production, and in particular relates to a strip steel welding and weld seam identification and sorting system. Background Technology

[0002] High-frequency straight seam resistance welded steel pipe is produced by forming hot-rolled coils using a forming machine, then heating and melting the edges of the pipe blank using the skin effect and proximity effect of high-frequency current, followed by pressure welding under the action of extrusion rollers. Currently, during pipe manufacturing, after high-frequency welding, excess weld metal needs to be scraped off. This scraped-off weld metal is called the external scraping strip, which is considered production waste and needs to be cleaned up promptly. Furthermore, during pipe manufacturing, the external scraping strip is a continuous iron wire, with one end always connected to the welded pipe. As the steel pipe moves, the external scraping strip curls and shifts disorderly, affecting the normal progress of the preceding or following section. Manual intervention is required, resulting in high workload and impacting production speed. The disorderly curling and shifting of the external scraping strip also poses certain safety hazards to nearby workers. Summary of the Invention

[0003] In view of this, the present invention aims to provide a strip steel welding device to solve the problem that in the prior art, when scraping weld scars on the outside of straight seam welded pipes, the removed weld scar strips cannot break automatically. In order to avoid the weld scar strips from being attached to the welded pipe, they need to be broken manually, which also prevents the speed of the machine from being increased and affects the production efficiency.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A strip steel welding device includes a pre-weld shaping unit, a welding unit, a weld scar shaping unit, and an external scraping unit. The welding unit is used to weld the rolled strip steel. The pre-weld shaping unit is set at the front end of the welding unit, and the weld scar shaping unit is set at the rear end of the welding unit. The pre-weld shaping unit is used to hold the rolled strip steel to stabilize the gap between the two sides of the rolled strip steel. The welding unit is used to weld the two sides of the strip steel to form a straight seam welded pipe. The weld scar shaping unit is used to compact and repair the external weld scar of the straight seam welded pipe and to indent the external weld scar. The external scraping unit is used to remove the external weld scar by turning, and the external weld scar removed by turning can be broken along the indentation.

[0006] Furthermore, the pre-welding shaping unit includes extrusion rollers, and an extrusion roller is respectively set on both sides of the rolled strip. The two extrusion rollers are arranged parallel to each other. A first linear module is installed at the lower end of each extrusion roller. The two first linear modules are arranged opposite to each other. Each first linear module is used to drive one extrusion roller to move laterally. The two first linear modules are used to adjust the relative distance between the two extrusion rollers. Both first linear modules are installed on the box body, and the box body is installed on the base through a second linear module. The second linear module is used for lifting and lowering the box body relative to the base.

[0007] Furthermore, the extrusion roller includes a first central shaft and a first roller body. One end of the first central shaft is rotatably connected to the movable end of the first linear module. The first roller body is fixedly sleeved around the first central shaft. A limiting ring groove is provided around the first roller body. The outer periphery of the rolled strip moves linearly along the outer periphery of the limiting ring groove. The two opposing first roller bodies can limit the relative position of the axis of the rolled strip and make the gap on both sides of the rolled strip stable.

[0008] Furthermore, the first roller body has a frustum structure, and the end of the first roller body closest to the housing is the larger diameter end.

[0009] Furthermore, the first linear module includes a first slide, a first lead screw, and a first guide rod. The first lead screw and the first guide rod are arranged parallel to each other. The outer periphery of the first lead screw is rotatably connected to the housing, and the outer periphery of the first lead screw is threadedly connected to the first slide. The first slide is provided with a first guide hole. The first guide rod is fixedly installed on the housing, and the outer periphery of the first guide rod is slidably connected to the first guide hole. A handwheel is installed at one end of the first lead screw.

[0010] Furthermore, the second linear module includes a first hydraulic cylinder and a second guide rod. The first hydraulic cylinder is fixedly installed on the base, and the movable end of the first hydraulic cylinder is installed at the lower end of the housing. The second guide rod is installed at the lower end of the first housing, and a first sliding sleeve is installed on the base. The outer periphery of the second guide rod is slidably connected to the inside of the first sliding sleeve.

[0011] Furthermore, the weld scar shaping unit includes a weld scar smoothing component and a weld scar indentation component, and the weld scar smoothing component and the weld scar indentation component are respectively fixedly installed on the periphery of the sliding shaft. The sliding shaft is slidably connected to the first frame. The first frame is installed at the rear end of the welding unit, and the weld scar smoothing component and the weld scar indentation component are respectively located on both sides of the first frame. The execution ends of the weld scar smoothing component and the weld scar indentation component are respectively rotatably connected to the periphery of the straight seam steel pipe.

[0012] Furthermore, a second lead screw is rotatably connected to the first frame, and the outer thread of the second lead screw is connected to the inner ring of the sliding shaft. A limiting slide is provided on the outer side of the sliding shaft, and a limiting slide groove is provided on the first frame. The limiting slide is slidably connected to the limiting slide groove. An opening is provided in the middle of the first frame, and the weld scar smoothing component and the weld scar indentation component are both located in the opening at the end fixed to the sliding shaft.

[0013] Furthermore, the weld scar smoothing assembly includes a second roller, a first swing arm, and a first connecting rod. One end of the first connecting rod is fixedly connected to the periphery of the sliding shaft, and the other end of the first connecting rod is rotatably connected to one end of the first swing arm. The other end of the first swing arm is rotatably connected to the middle of the second roller. The periphery of the second roller is tumbledly connected to the periphery of the straight seam steel pipe. The periphery of the second roller is provided with a smoothing annular groove. The cross-section of the smoothing annular groove is an arc-shaped structure, and the outer weld scar of the straight seam steel pipe abuts against the smoothing annular groove.

[0014] Furthermore, the weld scar indentation assembly includes a second swing arm, a second connecting rod, and a third roller. One end of the second connecting rod is fixedly connected to the periphery of the sliding shaft, and the other end of the second connecting rod is rotatably connected to one end of the second swing arm. The other end of the second swing arm is rotatably connected to one end of the third roller. The periphery of the third roller is rolled to the periphery of the straight seam steel pipe, and several pressing plates are installed on the periphery of the third roller. The pressing plates can press against the outer weld scar of the straight seam steel pipe.

[0015] Furthermore, the external scraping unit includes a second frame on which a scraping blade is mounted, one end of which is used to cut the external weld marks on the straight seam steel pipe.

[0016] Compared with the prior art, the strip steel welding device of the present invention has the following beneficial effects: the pre-welding shaping unit can hold the unwelded rolled strip steel, ensuring the relative position of the strip steel and the stability of the gap on both sides of the strip steel. At the same time, the welding unit maintains a fixed position to ensure the stability of the weld scar. Furthermore, the weld scar shaping unit can intermittently indent the weld scar. When the weld scar is machined by the external scraping unit, the machined weld scar can be broken along the indentation, avoiding the problem of the weld scar strip being rolled up for a long time and unable to detach from the weld pipe. This can reduce the labor intensity of workers and ensure production efficiency.

[0017] Another objective of this invention is to propose a weld seam identification and sorting system to solve the problems of existing weld seam inspection being carried out by workers visually, which is labor-intensive and results in inconsistent and unpredictable inspection quality.

[0018] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0019] A weld seam identification and sorting system includes a weld seam identification unit, a spraying unit, an origin alignment unit, and a steel pipe sorting unit. The weld seam identification unit is installed at the rear end of the external scraping unit, and the origin alignment unit is set opposite to the weld seam identification unit. Both the weld seam identification unit and the origin alignment unit are installed on one side of a third frame. The spraying unit is set on the other side of the third frame. The weld seam identification unit faces the weld seam of the straight seam steel pipe, and can take pictures of the weld seam of the straight seam steel pipe and transmit them to the controller. The controller determines whether the weld seam is qualified, and can control the spraying unit to spray color on the periphery of unqualified straight seam steel pipes. The origin alignment unit is used to detect the joint weld scars of straight seam square pipes and transmit the data to the controller. The controller can control the spraying unit to spray color on the joint weld scars of the straight seam steel pipes, and can adjust the relative position of the execution end of the spraying unit by the relative position of the spray color and the joint weld scars. A cold sawing device is set at the rear end of the spraying unit, and the steel pipe sorting unit is set at the rear end of the cold sawing device.

[0020] Furthermore, an air shower ring is provided between the external scraping unit and the weld identification unit, and the air shower ring is installed on the third frame. The air shower ring is located around the straight seam steel pipe, and the inlet end of the air shower ring is connected to an external compressor through a hose. The external compressor blows compressed air to the outside of the straight seam steel pipe through the air shower ring.

[0021] Furthermore, the weld seam recognition unit and the origin alignment unit each include a CCD camera, and the two CCD cameras are respectively connected to the controller.

[0022] Furthermore, the spraying unit includes a nozzle, and the weld identification unit and the origin alignment unit each correspond to one nozzle. The two nozzles are arranged opposite each other, and each nozzle is provided with a swing rod. The swing rod is provided with a first groove, and the periphery of the nozzle is slidably connected to the first groove. The nozzle can be fixedly connected to the first groove by a first locking pin. One end of the swing rod is provided with a shaft hole, and a first support rod is rotatably arranged in the shaft hole. The first support rod can be fixedly connected to the shaft hole by a second locking pin. The periphery of the first support rod is fixedly installed on a third frame.

[0023] Furthermore, the steel pipe sorting unit includes a conveying component, and a steel pipe positioning component is installed at one end of the conveying component. A color recognition sensor is set on one side of the steel pipe positioning component. Downstream conveying lines are set on both sides of the other end of the conveying component. Each downstream conveying line is equipped with a corresponding steel pipe unloading component. The steel pipe unloading component is installed on the conveying component, and the two steel pipe unloading components are arranged facing each other.

[0024] Furthermore, the steel pipe positioning assembly includes a fourth frame and a fourth roller. The fourth frame is installed at the rear end of the cold sawing device. Two fourth rollers are rotatably arranged inside the fourth frame, and the two fourth rollers are located on both sides of the straight seam steel pipe. Each fourth roller can be rolled to the periphery of the straight seam steel pipe.

[0025] Furthermore, the conveying assembly includes multiple fifth rollers arranged along the travel direction of the straight seam steel pipe, and each fifth roller is rotatably connected to a fifth frame. There is a clearance between each pair of fifth frames. A color recognition sensor is installed on the fifth frame near the steel pipe positioning assembly, and a color recognition sensor is set on each side of the straight seam steel pipe. Each color recognition sensor is fixedly installed on the fifth frame through a second support plate.

[0026] Furthermore, the steel pipe feeding assembly includes a second central shaft, a feeding turntable, a third support plate, a fourth support plate, and a power motor. One end of the second central shaft is fixedly connected to the output end of the power motor. The outer periphery of the second central shaft is rotatably mounted to the third and fourth support plates, respectively. The third and fourth support plates are respectively mounted on a fifth frame. The outer periphery of the power motor is fixedly mounted to the third or fourth support plate. The second central shaft is provided with multiple feeding turntables along the axial direction, and each feeding turntable is located within a clearance gap. Each feeding turntable is provided with multiple feeding blades along the circumferential direction, and the actuating end of the feeding blades has an arc-shaped structure.

[0027] Furthermore, the steel pipe unloading assembly also includes multiple unloading guide plates, which are arranged along the travel direction of the straight seam steel pipe. The lower end of each unloading guide plate is installed on the conveying assembly, and the upper end of the unloading guide plate is provided with a ramp. The ramp is used to guide the straight seam steel pipe from the conveying assembly to the downstream conveying line. A position sensor is installed at the end of the conveying assembly near the downstream conveying line. The position sensor is used to detect the presence of the straight seam steel pipe.

[0028] Furthermore, the downstream conveyor line includes a sixth frame and multiple synchronous belts. The multiple synchronous belts are arranged in parallel to each other. Each synchronous belt has a first synchronous pulley and a second synchronous pulley rotatably fitted inside its inner ring. The multiple first synchronous pulleys are rotatably connected to the sixth frame through a third central shaft, and the multiple second synchronous pulleys are rotatably connected to the sixth frame through a fourth central shaft. One end of the third central shaft and the fourth central shaft are respectively engaged with the inner ring of the second synchronous belt. One end of the third central shaft or one end of the fourth central shaft is fixedly connected to the output end of the feeding motor, which is fixedly installed on the sixth frame.

[0029] Furthermore, multiple partition plates are evenly distributed along the circumference of the first synchronous belt.

[0030] Furthermore, a feeding sensor and a stepping sensor are installed on the sixth frame. The feeding sensor and the stepping sensor are used to detect the presence of straight seam steel pipes. The feeding sensor is located on one side of the feeding guide plate, and the stepping sensor is located on one side of the partition plate.

[0031] Compared with existing technologies, the weld seam identification and sorting system of the present invention has the following advantages:

[0032] The weld identification unit can take pictures of the welds of straight seam steel pipes and transmit them to the controller. The controller determines whether the welds are qualified and can also control the spraying unit to spray color on the periphery of unqualified straight seam steel pipes. The downstream process automatically sorts the straight seam welded pipes by detecting whether they have been sprayed with color, which reduces the workload of the staff and ensures the stability of the inspection quality and production efficiency.

[0033] The origin alignment unit is used to detect weld scars at the joints of straight seam square tubes and transmit the data to the control unit. The controller can control the spraying unit to spray color onto the weld scars at the joints of the straight seam steel pipes. By visually observing the relative position of the spraying unit and the weld scars, the operator can adjust the relative position of the execution end of the spraying unit to ensure that the spraying position matches the weld defect. This avoids inaccurate spraying indication caused by mismatch between the spraying unit and the weld identification unit, thus ensuring the quality of the inspection. Attached Figure Description

[0034] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0035] Figure 1 This is a schematic diagram of the strip welding device according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the pre-welding shaping unit according to an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the assembly structure of the extrusion roller, the first linear module, and the housing according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the weld scar shaping unit according to an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of the weld scar smoothing component and the weld scar indentation component according to an embodiment of the present invention.

[0040] Figure 6 This is a schematic diagram of the structure of the sliding shaft and the first frame assembly according to an embodiment of the present invention;

[0041] Figure 7 This is a schematic diagram of the spraying unit described in an embodiment of the present invention;

[0042] Figure 8 This is a schematic diagram of the steel pipe sorting unit according to an embodiment of the present invention;

[0043] Figure 9 This is a schematic diagram of the steel pipe positioning assembly described in an embodiment of the present invention;

[0044] Figure 10 This is a schematic diagram of the assembly of the conveying component and the steel pipe unloading component according to an embodiment of the present invention;

[0045] Figure 11 This is a schematic diagram of the steel pipe cutting assembly described in an embodiment of the present invention;

[0046] Figure 12 This is a schematic diagram of the assembly of the feeding turntable and feeding blades according to an embodiment of the present invention;

[0047] Figure 13 This is a schematic diagram of the structure of the conveying assembly described in an embodiment of the present invention, in which downstream conveying lines are respectively arranged on both sides;

[0048] Figure 14 This is a schematic diagram of the downstream conveyor line described in an embodiment of the present invention;

[0049] Figure 15 This is a schematic diagram of the process of detecting welded pipes by the weld seam identification unit according to an embodiment of the present invention.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1-Pre-welding shaping unit; 11-Extrusion roller; 111-First roller body; 112-Limiting ring groove; 12-First linear module; 121-First slide table; 122-First lead screw; 123-First guide rod; 13-Box body; 14-Second linear module; 15-Base; 2-Welding unit; 21-Welding section; 3-Weld scar shaping unit; 31-Weld scar smoothing assembly; 311-Second roller body; 312-First swing arm 313-First connecting rod; 314-Flattening annular groove; 32-Weld scar indentation assembly; 321-Second swing arm; 322-Second connecting rod; 323-Third roller; 324-Crimping plate; 33-Sliding shaft; 331-Limiting slide; 34-First frame; 341-Second lead screw; 342-Opening; 4-External scraping unit; 41-Second frame; 42-Scraping knife; 5-Straight seam steel pipe; 6-Weld seam identification unit; 61 - Third frame; 62-Air shower ring; 7-Spraying unit; 71-Nozzle; 72-Swing rod; 73-First chute; 74-First locking pin; 75-First support rod; 8-Origin alignment unit; 9-Steel pipe sorting unit; 91-Conveying assembly; 911-Fifth roller; 912-Fifth frame; 92-Steel pipe positioning assembly; 921-Fourth frame; 922-Fourth roller; 93-Color recognition sensor; 94-Lower... 941-Sixth frame; 942-First synchronous belt; 943-First synchronous pulley; 944-Third central shaft; 945-Partition plate; 946-Feeding sensor; 947-Stepping sensor; 95-Steel pipe feeding assembly; 951-Second central shaft; 952-Feeding turntable; 953-Third support plate; 954-Power motor; 955-Feeding blade; 956-Feeding guide plate; 96-Positioning sensor. Detailed Implementation

[0052] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0054] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0056] like Figures 1-6As shown, the strip steel welding device includes a pre-weld shaping unit 1, a welding unit 2, a weld scar shaping unit 3, and an external scraping unit 4. The welding unit 2 is used to weld the rolled strip steel. The pre-weld shaping unit 1 is located at the front end of the welding unit 2, and the weld scar shaping unit 3 is located at the rear end of the welding unit 2. The pre-weld shaping unit 1 is used to hold the rolled strip steel to stabilize the gap between the two sides of the rolled strip steel. The welding unit 2 is used to weld the two sides of the strip steel to form a straight seam welded pipe. The weld scar shaping unit 3 is used to compact and repair the external weld scar of the straight seam welded pipe and to indent the external weld scar. The external scraping unit 4 is used to... The outer weld scar is removed by turning, and the removed outer weld scar can be broken along the indentation. The pre-welding shaping unit 1 can hold the unwelded rolled strip steel, ensuring the relative position of the strip steel and the stability of the gap on both sides of the strip steel. At the same time, the welding unit 2 maintains a fixed position to ensure the stability of the weld scar. The weld scar shaping unit 3 can intermittently indent the weld scar. When the outer scraping unit 4 turns, the turned weld scar can be broken along the indentation, avoiding the problem of the weld scar strip being rolled up for a long time and unable to detach from the welded pipe. This can reduce the labor intensity of workers and ensure production efficiency.

[0057] The pre-welding shaping unit 1 includes extrusion rollers 11, and one extrusion roller 11 is respectively arranged on both sides of the rolled strip. The two extrusion rollers 11 are arranged parallel to each other. A first linear module 12 is installed at the lower end of each extrusion roller 11. The two first linear modules 12 are arranged opposite to each other. Each first linear module 12 is used to drive one extrusion roller 11 to move laterally. The two first linear modules 12 are used to adjust the relative distance between the two extrusion rollers 11. Both first linear modules 12 are installed on the housing 13, and the housing 13 is installed on the base 15 through a second linear module 14. The second linear module 14 is used to raise and lower the housing 13 relative to the base 15. The extrusion roller 11 includes a first central shaft and a first roller body 111. The first central shaft... One end is rotatably connected to the movable end of the first linear module 12. The first roller body 111 is fixedly sleeved around the first central shaft. The first roller body 111 is provided with a limiting ring groove 112 around its periphery. The outer periphery of the rolled strip moves linearly along the outer periphery of the limiting ring groove 112. The two opposing first roller bodies 111 can limit the relative position of the axis of the rolled strip and make the gap on both sides of the rolled strip stable. The limiting ring groove 112 around the first roller body 111 is a limiting structure for the rolled strip to prevent the rolled strip from stretching outward under stress, causing the gap on both sides of the strip to be unstable. This ensures that the welding gap is always at the preset value, which can ensure the width and height of the subsequent weld scar and ensure the stability of the weld quality.

[0058] And such as Figure 3As shown, the first roller 111 has a frustum structure, and the end of the first roller 111 near the box 13 is the large diameter end, while the side of the first roller 111 near the weld is the small diameter end, so as to avoid the working end of the welding unit 2 and other processes, and prevent the first roller 111 from interfering with the welding and other subsequent processes.

[0059] The first linear module 12 includes a first slide 121, a first lead screw 122, and a first guide rod 123. The first lead screw 122 and the first guide rod 123 are arranged parallel to each other. The outer periphery of the first lead screw 122 is rotatably connected to the housing 13, and the outer periphery of the first lead screw 122 is threadedly connected to the first slide 121. The first slide 121 is provided with a first guide hole. The first guide rod 123 is fixedly installed on the housing 13, and the outer periphery of the first guide rod 123 is slidably connected to the first guide hole. A handwheel is installed at one end of the first lead screw 122. The operator can adjust the first slide 121, the first central shaft, and the first roller 111 by rotating the handwheel. The relative positions of the two first rollers 111 are adjusted to allow for the production of welded pipes of different specifications, thus improving the applicability of the device. Similarly, the second linear module 14 includes a first hydraulic cylinder and a second guide rod. The first hydraulic cylinder is fixedly mounted on the base 15, and the movable end of the first hydraulic cylinder is mounted on the lower end of the housing 13. The second guide rod is mounted on the lower end of the first housing 13. A first sliding sleeve is mounted on the base 15, and the outer periphery of the second guide rod is slidably connected to the first sliding sleeve. The first hydraulic cylinder is existing technology. The relative height of the two limiting ring grooves 112 can be adjusted by the first hydraulic cylinder, which is also used to meet the production needs of welded pipes of different specifications.

[0060] The external scraping unit 4 is prior art. It includes a second frame 41, on which a scraping blade 42 is mounted. One end of the scraping blade 42 is used to cut the external weld scar of the straight seam steel pipe 5. Furthermore, the welding unit 2 is prior art. It includes at least a welding part 21, which is either a welding head or an electromagnetic coil for heating. The welding part 21 is fixedly mounted to an external frame, which is located at the rear end of the pre-weld shaping unit 1. The welding part 21 is signal-connected to a controller. A weld scar shaping unit 3 is located at the rear end of the welding part 21. The weld scar shaping unit 3 includes a weld scar smoothing component 31 and a weld scar indentation component 32. The welding smoothing component and the welding indentation component are respectively fixedly mounted to the periphery of a sliding shaft 33, which slides. The first frame 34 is connected to the rear end of the welding unit 2, and the weld scar smoothing component 31 and the weld scar indentation component 32 are located on both sides of the first frame 34. The execution ends of the weld scar smoothing component 31 and the weld scar indentation component 32 are respectively rolled to the periphery of the straight seam steel pipe 5. The sliding shaft 33 is used to adjust the relative position of the weld scar smoothing component 31 and the weld scar indentation component 32 relative to the weld scar, so that the weld scar smoothing component 31 and the weld scar indentation component 32 can be pressed onto the weld scar. After welding is completed, the weld scar will have loose debris and oxide scale. The weld scar smoothing component 31 can compact the loose debris and oxide scale onto the weld scar to prevent the loose debris and oxide scale from falling randomly onto the welded pipe and affecting the quality of subsequent weld identification and inspection.

[0061] The first frame 34 is rotatably connected to the second lead screw 341. The outer thread of the second lead screw 341 is connected to the inner ring of the sliding shaft 33. The outer periphery of the sliding shaft 33 is provided with a limiting slide 331. The first frame 34 is provided with a limiting slide groove. The limiting slide 331 is slidably connected to the limiting slide groove. The first frame 34 is provided with an opening 342 in the middle. The ends of the weld scar smoothing component 31 and the weld scar indentation component 32 that are fixed to the sliding shaft 33 are both located in the opening 342. When the operator rotates the second lead screw 341, the limiting slide 331 can slide relative to the first frame 34 to adjust the relative position of the weld scar smoothing component 31 and the weld scar indentation component 32 relative to the weld scar to meet production requirements.

[0062] The weld scar smoothing assembly 31 includes a second roller body 311, a first swing arm 312, and a first connecting rod 313. One end of the first connecting rod 313 is fixedly connected to the periphery of the sliding shaft 33, and the other end of the first connecting rod 313 is rotatably connected to one end of the first swing arm 312. The other end of the first swing arm 312 is rotatably connected to the middle of the second roller body 311. The periphery of the second roller body 311 is rolledly connected to the periphery of the straight seam steel pipe 5, and the periphery of the second roller body 311 is provided with a smoothing annular groove 314. The cross-section is an arc-shaped structure. The outer weld scar of the straight seam steel pipe 5 abuts against the flat annular groove 314. The depth of the arc-shaped flat annular groove 314 is less than the height of the weld scar. The width of the opening 342 of the flat annular groove 314 is greater than the width of the weld scar. During operation, the second roller 311 rolls to connect with the outer periphery of the weld scar. The weld scar is flattened by the gravity of the second roller 311. When the weld scar is uneven, the second roller 311 swings on the first swing arm 312 to adapt to it, so as to ensure the orderly production.

[0063] The weld scar indentation assembly 32 includes a second swing arm 321, a second connecting rod 322, and a third roller body 323. One end of the second connecting rod 322 is fixedly connected to the periphery of the sliding shaft 33, and the other end of the second connecting rod 322 is rotatably connected to one end of the second swing arm 321. The other end of the second swing arm 321 is rotatably connected to one end of the third roller body 323. The periphery of the third roller body 323 is rolled to the periphery of the straight seam steel pipe 5, and several pressing plates 324 are installed on the periphery of the third roller body 323. The pressing plates 324 can press against the outer weld scar of the straight seam steel pipe 5. The actuating end of the pressing plate 324 protrudes beyond the periphery of the third roller body 323, and the periphery of the third roller body 323 is always rolled to the periphery of the welded pipe. When a weld bead is received, it will be scored. At this time, due to the impact of the pressure plate 324 on the weld bead, the third roller 323 will bounce to a certain extent. The second swing arm 321 can release the bounce of the third roller 323. In order to increase the pressing depth of the pressure plate 324, the third roller 323 can be set into an elliptical or cam structure. According to the production needs, the staff can adjust it to score the weld bead. When the outer scraper cuts the weld bead, the scoring will destroy the continuity of the weld bead strip. The weld bead strip will break along the scoring and fall off by itself without manual interruption, reducing the labor intensity of the workers. The staff can stay away from the cutting process, ensuring production safety, and there is no need to reduce the speed.

[0064] like Figure 1 , Figures 7-14As shown, the weld seam identification and sorting system includes a weld seam identification unit 6, a spraying unit 7, an origin alignment unit 8, and a steel pipe sorting unit 9. The weld seam identification unit 6 is installed at the rear end of the external scraping unit 4, and the origin alignment unit 8 is positioned opposite the weld seam identification unit 6. Both the weld seam identification unit 6 and the origin alignment unit 8 are installed on one side of the third frame 61. The spraying unit 7 is located on the other side of the third frame 61. The weld seam identification unit 6 faces the weld seam of the straight seam steel pipe 5, and the weld seam identification unit 6 can photograph and transmit the weld seam of the straight seam steel pipe 5. The data is sent to the controller, which determines whether the weld is qualified. The controller can also control the spraying unit 7 to spray color on the periphery of the unqualified straight seam steel pipe 5. The origin alignment unit 8 is used to detect the joint weld scars of the straight seam square pipe and transmit the data to the controller. The controller can control the spraying unit 7 to spray color on the joint weld scar position of the straight seam steel pipe 5. The relative position of the execution end of the spraying unit 7 can be adjusted by the relative position of the spraying color and the joint weld scar. A cold sawing device is set at the rear end of the spraying unit 7, and a steel pipe sorting unit 9 is set at the rear end of the cold sawing device.

[0065] During implementation, welding unit 2, weld scar shaping unit 3, and external scraping unit 4 all cause the straight seam welded pipe to heat up. During these steps, the welded pipe's outer perimeter needs to be constantly sprayed with water. However, the water will affect the subsequent coloring process of the coating unit 7. Figure 1 As shown, an air shower ring 62 is provided between the external scraping unit 4 and the weld identification unit 6, and the air shower ring 62 is installed on the third frame 61. The air shower ring 62 is located around the straight seam steel pipe 5. The inlet end of the air shower ring 62 is connected to an external compressor through a hose. The external compressor blows compressed air to the outside of the straight seam steel pipe 5 through the air shower ring 62. The compressed air can form an air knife around the welded pipe to blow away residual water around the welded pipe and at the same time cool down the outside of the welded pipe.

[0066] The weld seam recognition unit 6 and the origin alignment unit 8 each include a CCD camera, and the CCD camera is existing technology. The two CCD cameras are respectively connected to the controller. The CCD cameras can continuously take pictures of the welded pipe. The controller judges the weld seam and the surface of the steel pipe according to a preset program. The detection logic of the weld seam recognition unit 6 is to detect whether there are pits in the straight weld seam of the straight seam steel pipe 5, and the size of the inner diameter of the pits. This is set by the operator according to the working conditions. Figure 15The diagram shows the detection flowchart of weld seam recognition unit 6. Before welding, a CCD camera collects images of pits on the surface of the welded pipe. Then, an AI vision model is trained based on the defective pits selected by the staff and uploaded to the host computer. The training program is similar to that of the AI ​​vision detection underwater airtightness system with registration number 2025SR1280108. During welding, the CCD camera continuously photographs the welded pipe and uploads the images to the host computer. The host computer compares the results with the AI ​​vision model and sends them to the controller. The controller then controls the steel pipe sorting unit 9 based on the results. This embodiment only records the mechanical structure of weld seam recognition and sorting; the detection system program is existing technology. Without going into detail here, the same detection logic of the origin alignment unit 8 is used to detect the joint before the strip is rolled. The weld of the joint is perpendicular to the straight weld. The weld of the joint is arranged along the circumference of the welded pipe. Therefore, the weld of the joint can also be detected below the welded pipe. In this embodiment, the weld spraying unit 7 will spray green on the weld position of the joint when the joint is detected, and the weld spraying unit 7 will spray red when the unqualified straight weld is detected. The operator can adjust the relative position of the nozzle so that the green spray is exactly on the weld of the joint. Then, the weld sprayed in the red position can be assumed to be the unqualified weld for subsequent sorting and repair welding operations.

[0067] The spraying unit 7 includes a nozzle 71, and the weld identification unit 6 and the origin alignment unit 8 each correspond to one nozzle 71. The two nozzles 71 are arranged facing each other, and each nozzle 71 is correspondingly provided on a swing rod 72. The swing rod 72 is provided with a first groove 73. The periphery of the nozzle 71 is slidably connected to the first groove 73. The nozzle 71 can be fixedly connected to the first groove 73 by a first locking pin 74. One end of the swing rod 72 is provided with a shaft hole. A first support rod 75 is rotatably arranged in the shaft hole. The first support rod 75 can be fixedly connected to the shaft hole by a second locking pin. The periphery of the first support rod 75 is fixedly installed on the third frame 61. By adjusting the relative angle between the first support rod 75 and the swing rod 72, and the relative position of the nozzle 71 in the first groove 73, the relative position of the nozzle 71 relative to the weld identification unit 6 can be adjusted to ensure that the spraying position matches the weld defect.

[0068] The steel pipe sorting unit 9 is equipped with a cold sawing device at its front end. This cold sawing device is existing technology, such as the synchronous cold sawing machine disclosed in publication number CN102059486B. The cold sawing device can simultaneously cut welded pipes into preset lengths to form single straight seam welded pipes, which are then processed through... Figure 8The steel pipe sorting unit 9 performs sorting. The steel pipe sorting unit 9 includes a conveying component 91, and a steel pipe positioning component 92 is installed at one end of the conveying component 91. A color recognition sensor 93 is set on one side of the steel pipe positioning component 92. The color recognition sensor 93 is a CZ-V series RGB digital fiber optic sensor of the prior art. The signal of the color recognition sensor 93 is connected to the controller. Downstream conveying lines 94 are respectively set on both sides of the other end of the conveying component 91. Each downstream conveying line 94 is equipped with a corresponding steel pipe unloading component 95. The steel pipe unloading component 95 is installed on the conveying component 91, and the two steel pipe unloading components 95 are arranged facing each other.

[0069] The steel pipe positioning assembly 92 is used to prevent the straight seam steel pipe 5 from rotating axially, so as to avoid the deflection of the sprayed part. The steel pipe positioning assembly 92 includes a fourth frame 921 and a fourth roller 922. The fourth frame 921 is installed at the rear end of the cold sawing device. Two fourth rollers 922 are rotatably arranged inside the fourth frame 921, and the two fourth rollers 922 are located on both sides of the straight seam steel pipe 5. Each fourth roller 922 can be rolled to the periphery of the straight seam steel pipe 5. The conveying assembly 91 includes multiple fifth rollers 911 arranged along the travel direction of the straight seam steel pipe 5, and each fifth roller 911 is rotatably connected to a fifth frame 912. There is a clearance between each pair of fifth frames 912. Motors for rotation are arranged at intervals on the fifth rollers 911 to ensure that the straight seam welded pipe moves linearly on the multiple fifth rollers 911. Color recognition sensors 93 are installed on the fifth frames 912 near the steel pipe positioning assembly 92, and one color recognition sensor 93 is set on each side of the straight seam steel pipe 5. Each color recognition sensor 93 is fixedly installed on the fifth frame 912 by a second support plate. The positioning of the steel pipe positioning assembly 92 can prevent the spraying part from deflecting, so that the color recognition sensor 93 is always facing the spraying part, ensuring the orderly sorting.

[0070] like Figures 10-12As shown, the steel pipe feeding assembly 95 includes a second central shaft 951, a feeding turntable 952, a third support plate 953, a fourth support plate, and a power motor 954. One end of the second central shaft 951 is fixedly connected to the output end of the power motor 954. The outer periphery of the second central shaft 951 is rotatably mounted to the third support plate 953 and the fourth support plate, which are respectively mounted on a fifth frame 912. The power motor 954 is existing technology. The power motor 954 is connected to a controller, which can control the power motor 954 to rotate a set number of revolutions. Fixedly installed on the third support plate 953 or the fourth support plate, the second central shaft 951 is provided with multiple feeding turntables 952 along the axial direction, and each feeding turntable 952 is located in the clearance gap. Each feeding turntable 952 is provided with multiple feeding blades 955 along the circumference, and the actuating end of the feeding blade 955 is an arc-shaped structure. The arc-shaped structure can lift the straight seam steel pipe 5 to the outside. When the second central shaft 951 rotates, the feeding blades 955 can lift the straight seam steel pipe 5 and lower it to the downstream conveyor line 94. Two opposing steel pipe feeding components 95 are used to feed qualified and unqualified steel pipes respectively.

[0071] The steel pipe unloading assembly 95 also includes multiple unloading guide plates 956, which are arranged along the traveling direction of the straight seam steel pipe 5. The lower end of each unloading guide plate 956 is installed on the conveying assembly 91, and the upper end of the unloading guide plate 956 is provided with a ramp. The ramp is used to guide the straight seam steel pipe 5 from the conveying assembly 91 to the downstream conveying line 94. A position sensor 96 is installed at the end of the conveying assembly 91 near the downstream conveying line 94. The position sensor 96 is used to detect the presence of the straight seam steel pipe 5. The position sensor 96 is a photoelectric sensor of the prior art. The positioning sensor 96 is connected to the controller. When the positioning sensor 96 detects the presence of the welded pipe, the signal is transmitted to the controller. The controller compares the signal information of the color recognition sensor 93 at the front end and controls a power motor 954 to rotate. The guide plate can facilitate the unloading blade 955 to effectively guide the welded pipe to the downstream conveyor line 94, and avoids the unloading blade 955 being too long and interfering with the downstream conveyor line 94. The synchronous belt of the guide plate, unloading blade 955 and downstream conveyor line 94 is arranged at intervals to improve the compactness of the equipment, reduce the footprint, and reduce energy consumption.

[0072] The downstream conveyor line 94 includes a sixth frame 941 and multiple first synchronous belts 942. The multiple first synchronous belts 942 are arranged parallel to each other. Each first synchronous belt 942 has a first synchronous pulley 943 and a second synchronous pulley rotatably fitted onto its inner ring. The multiple first synchronous pulleys 943 are rotatably connected to the sixth frame 941 via a third central shaft 944. The multiple second synchronous pulleys are rotatably connected to the sixth frame 941 via a fourth central shaft. One end of the third central shaft 944 and the fourth central shaft respectively meshes with the inner ring of the second synchronous belt. Both the first synchronous belts 942 and the second synchronous belt are chains, and both the first synchronous pulleys 943 and the second synchronous pulley are sprockets. A sprocket is also provided at one end of both the third central shaft 944 and the fourth central shaft. To ensure engagement with the inner ring of the second synchronous belt, one end of the third central shaft 944 or one end of the fourth central shaft is fixedly connected to the output end of the feeding motor. The feeding motor is existing technology and can drive the third central shaft 944, the fourth central shaft, and multiple first synchronous belts 942 to rotate synchronously. The feeding motor is fixedly installed on the sixth frame 941. Multiple partition plates 945 are evenly distributed circumferentially on the first synchronous belts 942. A straight seam welded pipe is supported between each pair of partition plates 945 to limit the relative position of the straight seam welded pipe and prevent it from detaching from the downstream conveyor line 94. A feeding sensor 946 and a stepping sensor 947 are installed on the sixth frame 941. The feeding sensor 946 is located on one side of the feeding guide plate 956, and the stepping sensor 947 is located on one side of the partition plate 945, both of which are existing photoelectric sensors. The signals from the feeding sensor 946 and the stepping sensor 947 are connected to the controller. The feeding sensor 946 senses the presence of the straight seam steel pipe 5 on the feeding guide plate 956. When the controller controls the power motor 954 to rotate, it initially rotates a set number of revolutions to transfer the straight seam steel pipe 5 from the fifth roller 911 to the feeding guide plate 956 via the feeding blade 955. While the straight seam steel pipe 5 is rolling on the feeding guide plate, the power motor 954 remains stationary. When the feeding sensor 946 detects the presence of the straight seam steel pipe 5, a signal is transmitted to the controller. The controller controls the power motor 954 to rotate, causing the feeding blade 955 to rotate below the fifth roller 911 to avoid interfering with the linear movement of the subsequent straight seam steel pipe 5 on the fifth roller 911. When the feeding sensor 946 detects the presence of the straight seam steel pipe 5, a signal is transmitted to the controller. After a set delay, the controller controls the feeding motor to rotate, and the partition plate 945 moves circumferentially along the first synchronous belt 942. When the stepping sensor 947 detects the partition plate 945, a signal is transmitted to the controller, which controls the feeding motor to stop rotating to ensure that the partition plates 945 are in an empty state during subsequent feeding.

[0073] The control method in this embodiment is controlled by a controller. The controller circuit can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this document is mainly used to protect mechanical devices, and the control method and circuit connection will not be explained in detail here.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A strip steel welding device, characterized in that: The system includes a pre-weld shaping unit (1), a welding unit (2), a weld scar shaping unit (3), and an external scraping unit (4). The welding unit (2) is used to weld the rolled strip. The pre-weld shaping unit (1) is set at the front end of the welding unit (2), and the weld scar shaping unit (3) is set at the rear end of the welding unit (2). The pre-weld shaping unit (1) is used to hold the rolled strip to stabilize the gap between the two sides of the rolled strip. The welding unit (2) is used to weld the two sides of the strip to form a straight seam welded pipe. The weld scar shaping unit (3) is used to compact and repair the external weld scar of the straight seam welded pipe and to intermittently indent the external weld scar. The external scraping unit (4) is used to scrape the external weld scar. The machine removes the weld scar, and the removed weld scar can be broken along the indentation; the weld scar shaping unit (3) includes a weld scar flattening component (31) and a weld scar indentation component (32), and the weld flattening component and the weld indentation component are respectively fixedly installed on the periphery of the sliding shaft (33), the sliding shaft (33) is slidably connected to the first frame (34), the first frame (34) is installed at the rear end of the welding unit (2), and the weld scar flattening component (31) and the weld scar indentation component (32) are respectively located on both sides of the first frame (34), and the execution ends of the weld scar flattening component (31) and the weld scar indentation component (32) are respectively rolled to the periphery of the straight seam steel pipe (5); The weld scar indentation assembly (32) includes a second swing arm (321), a second connecting rod (322), and a third roller (323). One end of the second connecting rod (322) is fixedly connected to the periphery of the sliding shaft (33), and the other end of the second connecting rod (322) is rotatably connected to one end of the second swing arm (321). The other end of the second swing arm (321) is rotatably connected to one end of the third roller (323). The periphery of the third roller (323) is rolled to the periphery of the straight seam steel pipe (5), and several pressing plates (324) are installed on the periphery of the third roller (323). The actuating end of the pressing plate (324) protrudes to the periphery of the third roller (323) so as to press against the outer weld scar of the straight seam steel pipe (5). The weld scar smoothing assembly (31) includes a second roller body (311), a first swing arm (312) and a first connecting rod (313). One end of the first connecting rod (313) is fixedly connected to the periphery of the sliding shaft (33), and the other end of the first connecting rod (313) is rotatably connected to one end of the first swing arm (312). The other end of the first swing arm (312) is rotatably connected to the middle of the second roller body (311). The periphery of the second roller body (311) is rolledly connected to the periphery of the straight seam steel pipe (5), and the periphery of the second roller body (311) is provided with a smoothing annular groove (314). A weld identification unit (6) is installed at the rear end of the external scraping unit (4), and an origin alignment unit (8) is set opposite to the weld identification unit (6). Both the weld identification unit (6) and the origin alignment unit (8) are installed on one side of the third frame (61). A spraying unit (7) is set on the other side of the third frame (61). The weld identification unit (6) faces the weld of the straight seam steel pipe (5), and the weld identification unit (6) can take pictures of the weld of the straight seam steel pipe (5) and transmit them to the controller. The controller judges whether the weld is qualified, and the controller can control the spraying unit (7) to spray color on the periphery of the unqualified straight seam steel pipe (5). The origin alignment unit (8) is used to detect the joint weld scar of the straight seam steel pipe and transmit it to the controller. The controller can control the spraying unit (7) to spray color on the joint weld scar position of the straight seam steel pipe (5). A cold sawing device is set at the rear end of the spraying unit (7), and a steel pipe sorting unit (9) is set at the rear end of the cold sawing device. The steel pipe sorting unit (9) includes a conveying assembly (91), and a steel pipe positioning assembly (92) is installed at one end of the conveying assembly (91). A color recognition sensor (93) is set on one side of the steel pipe positioning assembly (92). Downstream conveying lines (94) are set on both sides of the other end of the conveying assembly (91). Each downstream conveying line (94) is equipped with a corresponding steel pipe unloading assembly (95). The steel pipe unloading assembly (95) is installed on the conveying assembly (91), and the two steel pipe unloading assemblies (95) are set opposite each other for unloading qualified and unqualified steel pipes respectively. The conveying assembly (91) includes multiple fifth rollers (911) arranged along the travel direction of the straight seam steel pipe (5), and each fifth roller (911) is rotatably connected to a fifth frame (912), with clearance gaps between each pair of fifth frames (912); The steel pipe feeding assembly (95) includes a second central shaft (951), a feeding turntable (952), a third support plate (953), a fourth support plate, and a power motor (954). One end of the second central shaft (951) is fixedly connected to the output end of the power motor (954). The outer periphery of the second central shaft (951) is rotatably mounted to the third support plate (953) and the fourth support plate, respectively. The third support plate (953) and the fourth support plate are respectively mounted on a fifth frame (912). The outer periphery of the power motor (954) is fixedly mounted to the third support plate (953) or the fourth support plate. The second central shaft (951) is provided with multiple feeding turntables (952) along the axial direction, and each feeding turntable (952) is located in the clearance gap. Each feeding turntable (952) is provided with multiple feeding blades (955) along the circumferential direction, and the execution end of the feeding blade (955) is an arc-shaped structure.

2. The strip welding apparatus according to claim 1, characterized in that: The pre-welding shaping unit (1) includes an extrusion roller (11), and an extrusion roller (11) is set on each side of the rolled strip. The two extrusion rollers (11) are set parallel to each other. A first linear module (12) is installed at the lower end of each extrusion roller (11). The two first linear modules (12) are set opposite to each other. Each first linear module (12) is used to drive an extrusion roller (11) to move laterally. The two first linear modules (12) are used to adjust the relative distance between the two extrusion rollers (11). Both first linear modules (12) are installed on the box (13), and the box (13) is installed on the base (15) through the second linear module (14). The second linear module (14) is used to drive the box (13) to rise and fall relative to the base (15). The extrusion roller (11) includes a first central shaft and a first roller body (111). One end of the first central shaft is rotatably connected to the movable end of the first linear module (12). The first roller body (111) is fixedly sleeved around the first central shaft. A limiting ring groove (112) is provided around the first roller body (111). The outer periphery of the rolled strip moves linearly along the outer periphery of the limiting ring groove (112). The two opposing first roller bodies (111) can limit the relative position of the axis of the rolled strip and make the gap between the two sides of the rolled strip stable.

3. The strip welding apparatus according to claim 1, characterized in that: An air shower ring (62) is set between the external scraping unit (4) and the weld identification unit (6), and the air shower ring (62) is installed on the third frame (61). The air shower ring (62) is located outside the straight seam steel pipe (5). The inlet end of the air shower ring (62) is connected to an external compressor through a hose. The external compressor blows compressed air to the outside of the straight seam steel pipe (5) through the air shower ring (62). The weld seam recognition unit (6) and the origin alignment unit (8) each include a CCD camera, and the two CCD cameras are respectively connected to the controller.

4. The strip welding apparatus according to claim 1, characterized in that: The spraying unit (7) includes a nozzle (71), and the weld identification unit (6) and the origin alignment unit (8) correspond to a nozzle (71) respectively. The two nozzles (71) are arranged opposite each other. Each nozzle (71) is provided with a swing rod (72), and the swing rod (72) is provided with a first groove (73). The outer periphery of the nozzle (71) is slidably connected to the first groove (73). The nozzle (71) can be fixedly connected to the first groove (73) by the first locking pin (74). One end of the swing rod (72) is provided with a shaft hole. A first support rod (75) is rotatably arranged in the shaft hole. The first support rod (75) can be fixedly connected to the shaft hole by the second locking pin. The outer periphery of the first support rod (75) is fixedly installed on the third frame (61).

5. The strip welding apparatus according to claim 1, characterized in that: The steel pipe positioning assembly (92) includes a fourth frame (921) and a fourth roller (922). The fourth frame (921) is installed at the rear end of the cold sawing device. Two fourth rollers (922) are rotatably arranged inside the fourth frame (921), and the two fourth rollers (922) are located on both sides of the straight seam steel pipe (5). Each fourth roller (922) can be rolled to the periphery of the straight seam steel pipe (5).

6. The strip welding apparatus according to claim 5, characterized in that: A color recognition sensor (93) is installed on the fifth frame (912) near the steel pipe positioning assembly (92), and a color recognition sensor (93) is set on each side of the straight seam steel pipe (5). Each color recognition sensor (93) is fixedly installed on the fifth frame (912) by a second support plate. The steel pipe unloading assembly (95) also includes multiple unloading guide plates (956), which are arranged along the traveling direction of the straight seam steel pipe (5). The lower end of each unloading guide plate (956) is installed on the conveying assembly (91), and the upper end of the unloading guide plate (956) is provided with a ramp. The ramp is used to guide the straight seam steel pipe (5) from the conveying assembly (91) to the downstream conveying line (94). A position sensor (96) is installed at one end of the conveying assembly (91) near the downstream conveying line (94). The position sensor (96) is used to detect the presence of the straight seam steel pipe (5).

7. The strip welding apparatus according to claim 6, characterized in that: The downstream conveyor line (94) includes a sixth frame (941) and multiple first synchronous belts (942). The multiple first synchronous belts (942) are arranged in parallel to each other. Each first synchronous belt (942) has a first synchronous pulley (943) and a second synchronous pulley rotatably sleeved on its inner ring. The multiple first synchronous pulleys (943) are rotatably connected to the sixth frame (941) through a third central shaft (944). The multiple second synchronous pulleys are rotatably connected to the sixth frame (941) through a fourth central shaft. One end of the third central shaft (944) and the fourth central shaft are respectively meshed with the inner ring of the second synchronous belt. One end of the third central shaft (944) or one end of the fourth central shaft is fixedly connected to the output end of the feeding motor. The feeding motor is fixedly installed on the sixth frame (941). Multiple partition plates (945) are evenly distributed along the circumference of the first synchronous belt (942); A feeding sensor (946) and a stepping sensor (947) are installed on the sixth frame (941). The feeding sensor (946) and the stepping sensor (947) are used to detect the presence of the straight seam steel pipe (5). The feeding sensor (946) is located on one side of the feeding guide plate (956), and the stepping sensor (947) is located on one side of the partition plate (945).

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