Welding pipe guide seam welding device

Abstract

The invention belongs to the technical field of other metal processing machinery manufacturing, and particularly relates to a welded pipe guide seam welding device which comprises a machine table, two XY-axis carrying mechanisms are symmetrically installed on the machine table, working arms are installed on the XY-axis carrying mechanisms, laser welding guns are fixedly installed at the ends of the working arms, and a discharging mechanism is arranged between the two XY-axis carrying mechanisms. The discharging mechanism comprises a fixing column, a fluted disc rotationally installed on the fixing column, a gear meshed with the fluted disc, a transmission shaft fixedly sleeved with the gear and a discharging tool fixedly installed on the gear and used for positioning a horizontal pipeline, the fixing column is fixedly installed on the machine table, the fluted disc is rotationally installed on the fixing column, the gear is meshed with the fluted disc, and the transmission shaft is rotationally installed on the machine table. The welding pipe taking and placing tool is simple in structure, convenient to operate and suitable for large-batch welding machining of the welding pipes, the friction force between the vertical pipeline and the U-shaped limiting tool is reduced through roller setting, and rotation of the vertical pipeline is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of other metal processing machinery manufacturing, in particular to a welded pipe guide seam welding device. Background Art

[0002] Welded steel pipe, also known as welded pipe, is a steel pipe made by welding steel plates or strips after curling and forming. During use, the welded pipe needs to be modified according to actual conditions, that is, two or more groups of welded pipes are welded together through welding equipment.

[0003] The patent with announcement number CN118527897B discloses a welded pipe guide seam welding device, including a clamping and centering component, a drive positioning component, a welding component, and a guide seam grinding component. The clamping and centering component includes a bottom bracket, a V-shaped frame, a rotating seat and other components, and the welding component includes a rotating shaft, a connecting sleeve, a welding gun and other components. This scheme can achieve circumferential grinding of the guide seam through the set guide seam grinding component, avoiding the influence of attachments on the welding of the guide seam, further improving the quality of the welding process, and eliminating the need for manual grinding. Through the set rotatable clamping and centering component, it can achieve positioning of vertical pipes and horizontal pipes while also switching the docking clamping and positioning of horizontal pipes, thereby improving the overall applicability of the equipment.

[0004] In the above scheme, when welding the guide seams of vertical and horizontal pipes, the two groups of pipes need to be fixed and positioned separately. First, the horizontal pipe needs to be clamped between the two groups of V-shaped frames, and then the vertical pipe needs to be positioned by driving the positioning assembly. Such operation is complicated and troublesome, which is not conducive to the disassembly and assembly of the pipes by the staff, and thus cannot be applied to large-scale welding processing of welded pipes. For this reason, the present invention provides a welded pipe guide seam welding device. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a pipe guide seam welding device described in the present invention comprises a machine table, two groups of XY axis conveying mechanisms are symmetrically installed on the machine table, a working arm is installed on the XY axis conveying mechanism, a laser welding gun is fixedly installed on the end of the working arm, and a discharge mechanism is arranged between the two groups of XY axis conveying mechanisms. The discharge mechanism comprises a fixed column, the fixed column is fixedly installed on the machine table, a gear disk rotatably installed on the fixed column, a gear meshing with the gear disk, the gear is fixedly sleeved on the transmission shaft, the transmission shaft is rotatably mounted on the machine table, a discharge tool fixedly mounted on the gear for positioning the horizontal pipe, an L-shaped bracket arranged in front of the gear disk, the L-shaped bracket is fixedly mounted on the machine table, a U-shaped limiting tool fixedly mounted at the end of the L-shaped bracket for positioning the vertical pipe, a first positioning piece for blocking the horizontal pipe is arranged between the discharge tool and the L-shaped bracket, seven groups of rectangular grooves are opened at equal angles in the U-shaped limiting tool, and rollers are rotatably mounted in the rectangular grooves; Through the coordinated setting of the discharge fixture and the U-shaped limit fixture, it is convenient for workers to take and place the welded pipes, and the operation is convenient, which is suitable for large-scale welding processing of welded pipes. Secondly, the roller setting reduces the friction between the vertical pipe and the U-shaped limit fixture, making it easier for the vertical pipe to rotate.

[0007] Preferably, the first positioning member includes a limit plate, the limit plate is mounted on the machine platform, a movable groove is provided on the limit plate, a pressure block is movably mounted in the movable groove, a spring is provided below the pressure block, the upper end of the spring is fixedly connected to the pressure block, the upper end of the spring is fixedly connected to the inner wall of the movable groove, a through hole is provided on the pressure block, the through hole is slidably connected to the guide post, the guide post is fixedly mounted in the movable groove, an inclined surface is provided on the end of the pressure block, and the spring is sleeved on the guide post; Under the action of the rebound force of the spring, the pressure block presses the horizontal pipe, thereby preventing the vertical pipe and the horizontal pipe from offsetting during the welding process, and ensuring the accuracy of the laser welding gun on the welding pipe.

[0008] Material toggling mechanism, its both ends are to be connected with the up-down knob.The two ends of hinge connection is arranged on the top of two supporting plates, and the supporting plates are respectively connected with the hinge parts of two supporting plates. When the welding of the butt-welded pipe is completed, the roller on the first positioning member is exactly opposite to the groove. Under the action of the counter-torsion force of the torsion spring, the pressure block and the limit plate on the first positioning member are rotated into the corresponding reset groove, releasing the obstruction of the horizontal pipeline by the first positioning member, making it easier for the staff to take and place the welded pipe.

[0009] The beneficial effects of the present invention are as follows: 1. The coordinated setting of the discharge fixture and the U-shaped limit fixture makes it easy for workers to take and place the welded pipes, and is easy to operate. It is suitable for large-scale welding processing of welded pipes. Secondly, the roller setting reduces the friction between the vertical pipe and the U-shaped limit fixture, making it easier for the vertical pipe to rotate.

[0010] 2. When placing the horizontal pipe on the discharge fixture, first place the horizontal pipe on the discharge fixture, and then push the horizontal pipe toward the first positioning piece so that the end of the horizontal pipe hits the inclined surface of the end of the pressure block. Under the guidance of the inclined surface, the pressure block moves upward along the guide column, and the pressure block stretches the spring until the inclined surface offsets the end of the horizontal pipe. The horizontal pipe continues to move until the end of the horizontal pipe hits the limit plate. Under the action of the rebound force of the spring, the pressure block presses the horizontal pipe, thereby avoiding the vertical pipe and the horizontal pipe from offsetting during the welding process, ensuring the accuracy of the laser welding gun on the welded pipe.

[0011] 3. When the gear disc, discharge tooling, horizontal pipeline and vertical pipeline rotate together, the roller on the first positioning part rolls along the outer ring of the guide ring, and the roller on the second positioning part is squeezed by the groove, so that the roller pushes the movable plate to move in the back direction of the groove, and the movable plate drives the two sets of guide rails to slide along the corresponding guide groove. At the same time, the movable plate drives the gear sleeve to rotate through the teeth, and the gear sleeve drives the limit plate and the pressure block to rotate out of the reset groove until the roller staggers the groove. At this time, the pressure block on the second positioning part presses the other end of the horizontal pipeline, and the limit plate on the second positioning part is against the other end of the horizontal pipeline. When the butt-welded pipe is welded, the roller on the first positioning part is exactly opposite the groove. Under the action of the counter-torsion force of the torsion spring, the pressure block and the limit plate on the first positioning part are rotated into the corresponding reset groove, releasing the obstruction of the horizontal pipeline by the first positioning part, making it convenient for the staff to take and place the welded pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the discharge mechanism of the present invention.

[0015] Figure 3 It is a schematic diagram of the U-shaped limiting tooling of the present invention.

[0016] Figure 4 This is a schematic diagram of the assembly of the toothed disc, unloading tooling, and positioning parts of the present invention.

[0017] Figure 5 It is a schematic diagram of the combination of the limit plate, movable groove, pressure block and spring of the present invention.

[0018] Figure 6 This is a schematic cross-sectional view of the fixed column, gear disc, material discharge tooling, and positioning piece assembly of the present invention.

[0019] Figure 7 It is an overall schematic diagram of the positioning member of the present invention.

[0020] Figure 8 This is a schematic diagram of another state of the positioning member of the present invention.

[0021] Figure: 1, machine table; 2, XY axis transport mechanism; 3, working arm; 4, laser welding gun; 5, unloading mechanism; 501, fixed column; 5011, guide ring; 5012, groove; 502, gear plate; 5021, reset groove; 503, gear; 504, transmission shaft; 505, unloading fixture; 506, L-shaped bracket; 507, U-shaped limit fixture; 5071, rectangular groove; 5072, roller; 508, First positioning member; 509, second positioning member; 5081, limit plate; 5082, movable groove; 5083, pressure block; 831, through hole; 832, inclined surface; 833, guide column; 5084, spring; 5085, flip mechanism; 851, rotary shaft; 852, hinge block; 21, guide groove; 853, torsion spring; 854, movable plate; 41, guide rail; 42, roller; 855, teeth; 856, gear sleeve. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] Example 1: Figures 1 to 3As shown, a pipe guide seam welding device according to an embodiment of the present invention includes a machine 1, two sets of XY axis transport mechanisms 2 are symmetrically installed on the machine 1, a working arm 3 is installed on the XY axis transport mechanism 2, a laser welding gun 4 is fixedly installed at the end of the working arm 3, and a discharge mechanism 5 is provided between the two sets of XY axis transport mechanisms 2. The discharge mechanism 5 includes a fixed column 501, the fixed column 501 is fixedly installed on the machine 1, a gear 502 rotatably installed on the fixed column 501, a gear 503 engaged with the gear 502, the gear 503 is fixedly mounted on a transmission shaft 504, and the transmission shaft 504 A discharging tool 505 is rotatably mounted on the machine 1 and fixedly mounted on the gear 503 for positioning the horizontal pipe. An L-shaped bracket 506 is arranged in front of the gear disc 502. The L-shaped bracket 506 is fixedly mounted on the machine 1. A U-shaped limiting tool 507 is fixedly mounted at the end of the L-shaped bracket 506 for positioning the vertical pipe. A first positioning piece 508 for blocking the horizontal pipe is arranged between the discharging tool 505 and the L-shaped bracket 506. Seven groups of rectangular grooves 5071 are opened at equal angles in the U-shaped limiting tool 507, and rollers 5072 are rotatably mounted in the rectangular grooves 5071.

[0024] Specifically, the XY-axis transport mechanism 2 is composed of two sets of ball screw machine structures. When pipe welding is required, the horizontal pipe is first placed on the discharge tooling 505, and the end of the horizontal pipe is against the first positioning piece 508, and then the vertical pipe is pushed into the U-shaped limit tooling 507 until the vertical pipe is against the roller 5072 in the U-shaped limit tooling 507, and then the vertical pipe is slowly released to move the vertical pipe downward. During the descending process, the position of the vertical pipe and the horizontal pipe is continuously rotated and adjusted so that the lower end of the vertical pipe and the welding point of the horizontal pipe are completely matched, thereby realizing the assembly of the vertical pipe and the horizontal pipe. Then, the ends of the two sets of laser welding guns 4 are aligned with the joint between the lower end of the vertical pipe and the horizontal pipe through the two sets of XY-axis transport mechanisms 2, and the two sets of laser welding guns 4 are started to face each other. The joints are welded, and then the transmission shaft 504 is driven to rotate by the motor. The transmission shaft 504 drives the toothed disc 502 to rotate through the gear 503, and the toothed disc 502 drives the horizontal pipe to rotate together with the vertical pipe through the discharge tooling 505. During the rotation process, the XY-axis transport mechanism 2 continuously adjusts the welding points of the laser welding gun 4, so that the two groups of laser welding guns 4 are welded along the butt guide seam of the vertical pipe and the horizontal pipe until the vertical pipe and the horizontal pipe are completely welded together. Compared with the prior art, the coordination setting of the discharge tooling 505 and the U-shaped limit tooling 507 makes it convenient for the staff to take and place the welded pipe, and the operation is convenient, which is suitable for large-scale welding processing of welded pipes. Secondly, the roller 5072 is set to reduce the friction between the vertical pipe and the U-shaped limit tooling 507, which facilitates the rotation of the vertical pipe.

[0025] like Figure 4 and Figure 5As shown, the first positioning member 508 includes a limit plate 5081, the limit plate 5081 is installed on the machine 1, a movable groove 5082 is provided on the limit plate 5081, a pressure block 5083 movably installed in the movable groove 5082, and a spring 5084 is arranged below the pressure block 5083, the upper end of the spring 5084 is fixedly connected to the pressure block 5083, the upper end of the spring 5084 is fixedly connected to the inner wall of the movable groove 5082, a through hole 831 is provided on the pressure block 5083, the through hole 831 is slidably connected to the guide column 833, the guide column 833 is fixedly installed in the movable groove 5082, the end of the pressure block 5083 is provided with an inclined surface 832, and the spring 5084 is sleeved on the guide column 833.

[0026] Specifically, since the vertical pipe and the horizontal pipe are not fixed, the device will generate vibration and other conditions during the rotation process, which will cause the vertical pipe and the horizontal pipe to deviate, affecting the accuracy of the laser welding gun 4 in welding the welded pipe. Therefore, when placing the horizontal pipe on the discharge tool 505, the horizontal pipe is first placed on the discharge tool 505, and then the horizontal pipe is pushed toward the first positioning member 508, so that the end of the horizontal pipe hits the inclined surface 832 at the end of the pressure block 5083. Under the guidance of the inclined surface 832, the pressure block 5083 moves upward along the guide column 833, and the pressure block 5083 stretches the spring 5084 until the inclined surface 832 is offset from the end of the horizontal pipe. The horizontal pipe continues to move until the end of the horizontal pipe hits the limit plate 5081. Under the action of the rebound force of the spring 5084, the pressure block 5083 presses the horizontal pipe, thereby preventing the vertical pipe and the horizontal pipe from deviating during the welding process and ensuring the accuracy of the laser welding gun 4 in welding the welded pipe.

[0027] Example 2: Figures 6 to 8As shown, in contrast to Example 1, another embodiment of the present invention is as follows: the first positioning member 508 also includes a flip mechanism 5085, the flip mechanism 5085 includes a rotary shaft 851, the rotary shaft 851 is fixedly connected to the lower end of the limit plate 5081, the two ends of the rotary shaft 851 are respectively rotatably connected to the two sets of hinge blocks 852, the hinge blocks 852 are fixedly connected to the bottom surface of the machine 1, two sets of torsion springs 853 are sleeved at both ends of the rotary shaft 851, a movable plate 854 movably installed between the two sets of hinge blocks 852, a plurality of groups of teeth 855 are arranged on the movable plate 854, a gear sleeve 856 that meshes with the teeth 855, and the gear sleeve 856 is fixedly sleeved on the lower end of the limit plate 5081, and the discharge mechanism 5 also includes the first positioning member A second positioning member 509 with the same structure as 508, two groups of reset grooves 5021 are symmetrically provided on the toothed disc 502, the first positioning member 508 and the second positioning member 509 are respectively installed at the two groups of reset grooves 5021, one end of the torsion spring 853 is fixedly connected to the end of the rotary shaft 851, and the other end of the torsion spring 853 is fixedly connected to the hinge block 852, two groups of guide rails 41 are symmetrically installed on the movable plate 854, a guide groove 21 is provided on the hinge block 852, the guide rail 41 is slidably connected to the guide groove 21, and a roller 42 is rotatably installed on the end of the movable plate 854, a guide ring 5011 is fixedly sleeved on the fixed column 501, the roller 42 is rollingly connected to the outer ring of the guide ring 5011, and a groove 5012 is provided on the outer ring of the guide ring 5011.

[0028] Specifically, after the welding of the butt-welded pipe is completed, since the limit plate 5081 blocks the backward direction of the horizontal pipe, the worker must push the horizontal pipe forward, release the fixing of the horizontal pipe end by the pressure block 5083, and then lift the horizontal pipe upward to avoid the obstruction of the horizontal pipe by the limit plate 5081. In this way, the welded pipe can be removed from the device after welding. However, this operation makes it troublesome for the worker to take and put the welded pipe, affecting the worker's efficiency in taking and putting. In the initial state, the pressure block 5083 on the second positioning member 509 and the limit plate 5081 are located in the corresponding reset groove 5021, the roller 42 on the second positioning member 509 is located in the groove 5012, and the torsion spring 853 on the first positioning member 508 is in a screwed state. When the toothed disc 502, the discharging tool 505, the horizontal pipe and the vertical pipe rotate together, the roller 42 on the first positioning member 508 rolls along the outer ring of the guide ring 5011, and the roller 4 2 is squeezed by the groove 5012, so that the roller 42 pushes the movable plate 854 to move in the direction away from the groove 5012, and the movable plate 854 drives the two sets of guide rails 41 to slide along the corresponding guide groove 21. At the same time, the movable plate 854 drives the gear sleeve 856 to rotate through the teeth 855, and the gear sleeve 856 drives the limit plate 5081 together with the pressure block 5083 to rotate out of the reset groove 5021 until the roller 42 staggers the groove 5012. At this time, the pressure block 5083 on the second positioning member 509 presses The other end of the horizontal pipe is held, and the limit plate 5081 on the second positioning member 509 is against the other end of the horizontal pipe. When the welding of the welding pipe is completed, the roller 42 on the first positioning member 508 is just opposite the groove 5012. Under the action of the counter-torsion force of the torsion spring 853, the pressure block 5083 and the limit plate 5081 on the first positioning member 508 are rotated into the corresponding reset groove 5021, releasing the obstruction of the first positioning member 508 to the horizontal pipe, making it easier for the staff to take and place the welding pipe.

[0029] Working principle: first, place the horizontal pipe on the discharge fixture 505, and make the end of the horizontal pipe against the first positioning piece 508, then push the vertical pipe into the U-shaped limit fixture 507, until the vertical pipe reaches the roller 5072 in the U-shaped limit fixture 507, then slowly loosen the vertical pipe to move it downward, and in the process of descending, continuously rotate and adjust the position of the vertical pipe and the horizontal pipe so that the lower end of the vertical pipe is completely aligned with the welding point of the horizontal pipe, thus realizing the assembly of the vertical pipe and the horizontal pipe, and then use the two sets of XY axis transport mechanisms 2 to The ends of the two groups of laser welding guns 4 are facing the joint between the lower end of the vertical pipe and the horizontal pipe, and the two groups of laser welding guns 4 are started to weld the joint. Then, the transmission shaft 504 is driven by the motor to rotate. The transmission shaft 504 drives the gear plate 502 to rotate through the gear 503. The gear plate 502 drives the horizontal pipe and the vertical pipe to rotate together through the unloading tool 505. During the rotation process, the XY axis transport mechanism 2 continuously adjusts the welding points of the laser welding guns 4, so that the two groups of laser welding guns 4 are welded along the joint guide seam between the vertical pipe and the horizontal pipe until the vertical pipe and the horizontal pipe are completely welded together. When placing the horizontal pipe on the discharging fixture 505, first place the horizontal pipe on the discharging fixture 505, then push the horizontal pipe toward the first positioning member 508, so that the end of the horizontal pipe abuts the inclined surface 832 at the end of the pressing block 5083, and under the guidance of the inclined surface 832, the pressing block 5083 moves upward along the guide column 833, and the pressing block 5083 stretches the spring 5084 until the inclined surface 832 is offset from the end of the horizontal pipe, and the horizontal pipe continues to move until the end of the horizontal pipe abuts the limit plate 5081, and under the rebound force of the spring 5084, the pressing block 5083 presses the horizontal pipe; When the toothed disc 502, the unloading fixture 505, the horizontal pipe, and the vertical pipe rotate together, the roller 42 on the first positioning member 508 rolls along the outer ring of the guide ring 5011, and the roller 42 on the second positioning member 509 is squeezed by the groove 5012, so that the roller 42 pushes the movable plate 854 to move in the direction away from the groove 5012, and the movable plate 854 drives the two sets of guide rails 41 to slide along the corresponding guide grooves 21. At the same time, the movable plate 854 drives the gear sleeve 856 to rotate through the teeth 855, and the gear sleeve 856 drives the limit plate 5081 Together with the pressure block 5083, it rotates out of the reset groove 5021 until the roller 42 is offset from the groove 5012. At this time, the pressure block 5083 on the second positioning member 509 presses the other end of the horizontal pipe, and the limit plate 5081 on the second positioning member 509 is close to the other end of the horizontal pipe. When the butt-welded pipe is welded, the roller 42 on the first positioning member 508 is just facing the groove 5012. Under the action of the counter-torsion force of the torsion spring 853, the pressure block 5083 and the limit plate 5081 on the first positioning member 508 are rotated into the corresponding reset groove 5021.

[0030] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipe guide seam welding device, comprising a machine (1), characterized in that: Two sets of XY-axis transport mechanisms (2) are symmetrically mounted on the machine (1), a working arm (3) is mounted on the XY-axis transport mechanism (2), a laser welding gun (4) is fixedly mounted on the end of the working arm (3), and a material discharge mechanism (5) is provided between the two sets of XY-axis transport mechanisms (2); The discharge mechanism (5) comprises: A fixed column (501), the fixed column (501) is fixedly mounted on the machine platform (1); Rotating a toothed disc (502) mounted on the fixed column (501); a gear (503) engaging the gear wheel (502); A transmission shaft (504), the gear (503) is fixedly mounted on the transmission shaft (504), and the transmission shaft (504) is rotatably mounted on the machine (1); A material discharging tool (505) fixedly mounted on the gear (503) for positioning a horizontal pipeline; An L-shaped bracket (506) is arranged in front of the toothed disc (502), and the L-shaped bracket (506) is fixedly mounted on the machine platform (1); A U-shaped limiting fixture (507) is fixedly mounted at the end of the L-shaped bracket (506) for positioning the vertical pipeline.

2. A welded pipe guide seam welding device according to claim 1, characterized in that: A first positioning member (508) for blocking the horizontal pipe is provided between the material discharging fixture (505) and the L-shaped bracket (506), and seven groups of rectangular grooves (5071) are provided at equal angles in the U-shaped limiting fixture (507), and rollers (5072) are rotatably installed in the rectangular grooves (5071).

3. A pipe guide seam welding device according to claim 2, characterized in that: The first positioning member (508) includes: A limiting plate (5081), the limiting plate (5081) being mounted on the machine platform (1); A movable groove (5082) is provided on the limiting plate (5081); A pressing block (5083) movably mounted in the movable groove (5082); A spring (5084) is provided below the pressure block (5083).

4. A pipe guide seam welding device according to claim 3, characterized in that: The upper end of the spring (5084) is fixedly connected to the pressing block (5083), and the upper end of the spring (5084) is fixedly connected to the inner wall of the movable groove (5082).

5. The pipe guide seam welding device according to claim 4, characterized in that: A through hole (831) is provided on the pressing block (5083), the through hole (831) is slidably connected to a guide post (833), and the guide post (833) is fixedly installed in the movable groove (5082).

6. The pipe guide seam welding device according to claim 5, characterized in that: An inclined surface (832) is provided at the end of the pressing block (5083), and the spring (5084) is sleeved on the guide column (833).

7. The pipe guide seam welding device according to claim 6, characterized in that: The first positioning member (508) further includes a flipping mechanism (5085), wherein the flipping mechanism (5085) includes a rotating shaft (851), and the rotating shaft (851) is fixedly connected to the lower end of the limiting plate (5081); The two ends of the rotary shaft (851) are rotatably connected to two sets of hinge blocks (852), and the hinge blocks (852) are fixedly connected to the bottom surface of the machine (1); Two groups of torsion springs (853) sleeved on both ends of the rotary shaft (851); A movable plate (854) movably mounted between the two sets of hinge blocks (852); A plurality of groups of teeth (855) provided on the movable plate (854); A tooth sleeve (856) engages with the teeth (855), and the tooth sleeve (856) is fixedly sleeved on the lower end of the limiting plate (5081).

8. The pipe guide seam welding device according to claim 7, characterized in that: The discharge mechanism (5) further comprises a second positioning member (509) having the same structure as the first positioning member (508), two groups of reset grooves (5021) are symmetrically provided on the toothed disc (502), and the first positioning member (508) and the second positioning member (509) are respectively installed at the two groups of reset grooves (5021).

9. The pipe guide seam welding device according to claim 8, characterized in that: One end of the torsion spring (853) is fixedly connected to the end of the rotary shaft (851), and the other end of the torsion spring (853) is fixedly connected to the hinge block (852).

10. The pipe guide seam welding device according to claim 9, characterized in that: Two sets of guide rails (41) are symmetrically mounted on the movable plate (854), a guide groove (21) is provided on the hinge block (852), the guide rails (41) are slidably connected to the guide groove (21), a roller (42) is rotatably mounted on the end of the movable plate (854), a guide ring (5011) is fixedly sleeved on the fixed column (501), the roller (42) is rollingly connected to the outer ring of the guide ring (5011), and a groove (5012) is provided on the outer ring of the guide ring (5011).

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