Heat supply pipeline girth welding equipment

Abstract

The invention relates to the technical field of welding equipment, and particularly discloses heat supply pipeline girth welding equipment which comprises a main body structure, a fixing structure, a driving structure and a welding structure. The fixing structure is fixedly arranged in the middle of the rear side of the main body structure, the driving structure is fixedly arranged in the middle of the front side of the main body structure, and the welding structure is fixedly arranged on the driving structure. The position of the baffle pad can be synchronously adjusted according to the diameter for clamping and fixing; then a first driving seat and a second driving seat are correspondingly and synchronously overturned and clamped with a first clamping seat and a second clamping seat respectively, and a 180-degree arc-shaped toothed plate and a sliding rod are stressed to carry out circular motion, so that the welding machine structure is driven to move circumferentially and can cross a 90-degree opening part, and the welding efficiency is improved. And outer wall girth welding of pipelines with different diameters is effectively matched.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, in particular to a heating pipeline circumferential seam welding device. Background Art

[0002] The laying of heating pipelines requires that the pipelines be erected, fixed and butted, and the pipelines are connected by welding. Common welding methods for heating pipelines include butt welding (such as argon arc welding, arc welding), resistance welding, etc. Since the pipe mouth is round, a ring seam is formed after butt welding, so it is necessary to maintain extremely high stability during welding, and welding equipment is mostly used for welding. Manual welding is difficult, but the existing welding machine needs to be manually installed and fixed at the pipe mouth before use. The operation is complicated, time-consuming, and mostly used for single-diameter pipes. Therefore, a heating pipeline ring seam welding device is designed. Summary of the invention

[0003] The object of the present invention is to provide a heating pipeline circumferential seam welding device to solve the problems raised in the above background technology.

[0004] In order to solve the above-mentioned problem, the present invention provides the following technical solutions: a heating pipe circumferential seam welding device, comprising a main structure, a fixed structure, a driving structure and a welding structure; the fixed structure is fixedly arranged in the middle of the rear side of the main structure, the driving structure is fixedly arranged in the middle of the front side of the main structure, and the welding structure is fixedly arranged on the driving structure.

[0005] Preferably, the main structure includes a first clamping seat, a pair of flip arms, a second clamping seat, a box cover, a first hydraulic cylinder, a pair of armrests, a control panel group and a battery; the first clamping seat is L-shaped, and an arc-shaped first card slot is provided between the two ends of the first clamping seat, one end of the first clamping seat is a cavity structure without an upper wall, and the side wall of the other end of the first clamping seat is provided with a charging port and a power connection port, the pair of flip arms are T-shaped rods and have three ends, the top ends of the pair of flip arms are movably arranged at the bottom of one end of the first clamping seat, and are respectively located symmetrically on the front and rear side walls, the second clamping seat is arc-shaped, and a first card slot is provided on the right side of the second clamping seat that is symmetrical to the first A second card slot with the same diameter as the card slot, one end of the second clamp seat is fixedly arranged between the bottom ends of a pair of flip arms, and the second clamp seat is relatively connected and fit with the first clamp seat, the box cover is detachably buckled on the upper wall of one end of the first clamp seat, and a control keyboard is arranged on the upper wall of one end of the box cover, one end of the first hydraulic cylinder is movably connected to the left side wall of one end of the first clamp seat, and the other end of the first hydraulic cylinder is tilted and movably connected between the left ends of a pair of flip arms, a pair of handrails are respectively arranged on the right side wall of the other end of the first clamp seat, the control panel group is fixedly arranged on the inner lower wall of the first clamp seat and close to the left end, and the battery is fixedly arranged on the inner lower wall of the first clamp seat and close to the right end.

[0006] Preferably, the fixed structure includes a first fixed seat, a second fixed seat, two pairs of second hydraulic cylinders and two pairs of stoppers; the first fixed seat is a semicircular structure, the first fixed seat is fixedly arranged on the rear side wall of the first clamp seat, and corresponds to the first slot of the first clamp seat, the second fixed seat is arc-shaped, and the diameter of the second fixed seat is the same as that of the first fixed seat, the second fixed seat is fixedly arranged on the rear side wall of the second clamp seat, and the second fixed seat is connected to the first fixed seat, the second fixed seat is matched with the second slot, two pairs of the second hydraulic cylinders are respectively fixed through the first fixed seat and the second fixed seat at both ends, and are arranged equidistantly in a clockwise direction, and the two pairs of the stoppers are respectively fixed on the telescopic ends of the second hydraulic cylinders, and the stoppers are located in the first slot.

[0007] Preferably, the driving structure comprises a first driving seat, a second driving seat, a sliding rod, a gear plate, two pairs of motors and two pairs of gears; The first driving seat is an arc-shaped structure, and a first annular groove connected to the front side wall is opened in the middle of the first driving seat, the first driving seat is fixedly arranged on the front side wall of the first card seat, and the first driving seat is matched with the first card groove, the second driving seat is fixedly arranged on the front side wall of the second card seat, and the second driving seat is matched with the second card groove, the second driving seat is provided with a second annular groove corresponding to the first annular groove, the sliding rod is an arc-shaped round rod structure, the sliding rod is movably inserted in the first annular groove, one end of the tooth plate is movably inserted through the front side of the first annular groove and is connected to the front side wall of the sliding rod, the tooth plate is an arc-shaped structure, and a plurality of teeth are opened in the middle of the outer side wall of the tooth plate, the two pairs of the motors are equidistantly arranged on the first driving seat and the outer side wall of the second driving seat, the two pairs of the gears are fixedly arranged on the driving ends of the motors, and the gears are meshed with the tooth plate.

[0008] Preferably, the welding structure comprises a welding arm, a third hydraulic cylinder, a lifting arm and a welding gun body; One end of the welding arm is fixedly arranged at the middle of the outer wall of the tooth plate and is located in front of the tooth, the other end of the welding arm is located in front of the tooth plate, and a lifting port is opened in the middle of the other end of the welding arm, one end of the third hydraulic cylinder is fixedly arranged on the other end of the welding arm, one end of the lifting arm movably passes through the lifting port, and the other end of the lifting arm is connected to the telescopic end of the third hydraulic cylinder, and the welding gun body is fixedly arranged on one end of the lifting arm.

[0009] Preferably, after the first clamping seat and the second clamping seat are docked, the first clamping groove and the second clamping groove thereof are spliced ​​into a 280-degree arc-shaped inner wall.

[0010] Preferably, the sliding rod and the tooth plate are both 180-degree arc structures.

[0011] Preferably, the tooth plate slides along the circumference of the first driving seat and the second driving seat, and the tooth plate is always engaged with the gear.

[0012] The invention provides a heating pipe annular seam welding device, which has the following beneficial effects: a 280-degree annular bayonet is formed by a first clamping seat and a second clamping seat for clamping on the pipe, and the second clamping seat can be flipped relative to the first clamping seat to increase the space of the 90-degree notch, so as to facilitate the fixing and placement of the equipment on the pipe; secondly, through the fixing structure, the pipe with a diameter smaller than the inner wall diameter of the annular bayonet in this case can be clamped and fixed by synchronously adjusting the position of the baffle according to the diameter; then, the first driving seat and the second driving seat are respectively synchronously flipped and clamped corresponding to the first clamping seat and the second clamping seat, and the 180-degree arc-shaped tooth plate and the sliding rod are forced to move in a circular motion, so as to drive the welding machine structure to move in a circular motion, and at the same time, it can cross the 90-degree opening part, and effectively fit the outer wall annular seam welding of pipes with different diameters; in summary, the invention has the following effects: 1. The first clamp and the second clamp form a 280-degree annular bayonet, and the second clamp can be flipped to surround the pipeline to a large extent, providing a relatively stable pre-installation foundation; and the second clamp can be flipped relative to the first clamp to increase the space of the 90-degree notch. This design greatly facilitates the placement of the equipment on the pipeline, avoids installation difficulties caused by space limitations, and does not require excessive human intervention for manual fixation.

[0013] 2. The design of flipping and enlarging the notch space makes the equipment more adaptable to different pipeline installation positions and angles; for example, when the pipeline is at a high or inclined position, the operator can more conveniently adjust the position of the clamp and accurately fix the equipment on the pipeline, reducing the difficulty and risk during the installation process.

[0014] 3. The fixed structure can clamp and fix the pipe whose diameter is smaller than the inner wall diameter of the annular bayonet in this case, and the position of the baffle can be adjusted synchronously according to the pipe diameter; it has strong versatility and can adapt to pipes of different diameters.

[0015] 4. The first drive seat and the second drive seat are synchronously flipped and clamped with the first clamp seat and the second clamp seat respectively, and circular motion is performed by the 180-degree arc-shaped tooth plate and the slide rod, which can drive the welding structure to move in a circular motion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the assembly structure of the present invention; Figure 2 It is a schematic diagram of the main structure of the present invention; Figure 3 It is a rear view structural schematic diagram of the main structure of the present invention; Figure 4 It is a schematic diagram of the split structure of the fixed structure of the present invention; Figure 5It is a schematic diagram of the assembly structure of the fixing structure and the main structure of the present invention; Figure 6 It is a schematic diagram of the split structure of the driving structure of the present invention; Figure 7 It is a schematic diagram of the split structure of the welding structure of the present invention; Figure 8 It is a schematic diagram of the welding structure assembly structure of the present invention.

[0017] In the figure: 1. main structure, 11. first clamping seat, 12. flip arm, 13. second clamping seat, 14. box cover, 15. first hydraulic cylinder, 16. armrest, 17. control panel group, 18. battery, 2. fixed structure, 21. first fixed seat, 22. second fixed seat, 23. second hydraulic cylinder, 24. stopper, 3. driving structure, 31. first driving seat, 32. second driving seat, 33. slide bar, 34. gear plate, 35. motor, 36. gear, 4. welding structure, 41. welding arm, 42. third hydraulic cylinder, 43. lifting arm, 44. welding gun body, 5. first slot, 6. second slot, 7. first ring groove, 8. second ring groove. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 8 The present invention provides a technical solution: a heating pipeline circumferential seam welding device, comprising a main structure 1, a fixed structure 2, a driving structure 3 and a welding structure 4; the fixed structure 2 is fixedly arranged in the middle of the rear side of the main structure 1, the driving structure 3 is fixedly arranged in the middle of the front side of the main structure 1, and the welding structure 4 is fixedly arranged on the driving structure 3; the main structure 1 fits the pipeline, the fixed structure 2 is adjusted according to different diameters of the pipeline for clamping and fixing, and the driving structure 3 drives the welding structure 4 to rotate 360 ​​degrees around the pipeline on the main structure 1.

[0020] As a further solution of the present invention, the main structure 1 includes a first clamping seat 11, a pair of flip arms 12, a second clamping seat 13, a box cover 14, a first hydraulic cylinder 15, a pair of armrests 16, a control panel group 17 and a battery 18; the first clamping seat 11 is L-shaped, and an arc-shaped first card slot 5 is opened between the two ends of the first clamping seat 11, one end of the first clamping seat 11 is a cavity structure without an upper wall, and the side wall of the other end of the first clamping seat 11 is provided with a charging port and a power connection port, the pair of flip arms 12 are both T-shaped rods and have three ends, the top ends of the pair of flip arms 12 are movably arranged at the bottom of one end of the first clamping seat 11, and are respectively located symmetrically on the front and rear side walls, the second clamping seat 13 is arc-shaped, and a second card slot 6 with the same diameter as the first card slot 5 is opened on the right side of the second clamping seat 13, and one end of the second clamping seat 13 is fixedly arranged at the bottom of the pair of flip arms 12 The second clamping seat 13 is connected and matched with the first clamping seat 11, the box cover 14 is detachably buckled on the upper wall at one end of the first clamping seat 11, and a control keyboard is arranged on the upper wall at one end of the box cover 14, one end of the first hydraulic cylinder 15 is movably connected to the left side wall at one end of the first clamping seat 11, and the other end of the first hydraulic cylinder 15 is tilted and movably connected between the left ends of a pair of flip arms 12, a pair of handrails 16 are respectively arranged on the right side wall at the other end of the first clamping seat 11, the control panel group 17 is fixedly arranged on the lower inner wall of the first clamping seat 11 and close to the left end, and the battery 18 is fixedly arranged on the lower inner wall of the first clamping seat 11 and close to the right end; the first hydraulic cylinder 15 can be controlled to extend and retract by powering by the battery 18, and the second clamping seat 13 is driven to flip by the flip arm 12, thereby increasing the 90-degree opening space between the second clamping seat 13 and the first clamping seat 11, so as to facilitate clamping on the corresponding pipe.

[0021] As a further solution of the present invention, the fixing structure 2 includes a first fixing seat 21, a second fixing seat 22, two pairs of second hydraulic cylinders 23 and two pairs of baffles 24; the first fixing seat 21 is a semicircular structure, the first fixing seat 21 is fixedly arranged on the rear side wall of the first clamping seat 11, and corresponds to the first card slot 5 of the first clamping seat 11, the second fixing seat 22 is arc-shaped, and the diameter of the second fixing seat 22 is the same as that of the first fixing seat 21, the second fixing seat 22 is fixedly arranged on the rear side wall of the second clamping seat 13, and the second fixing seat 22 is connected to the first fixing seat 21, the second fixing seat 22 is matched with the second card slot 6, and the two pairs of second hydraulic cylinders 23 are connected to the second fixing seat 21. The pressure cylinders 23 are fixed through the first fixed seat 21 and the second fixed seat 22 at both ends, and are arranged equidistantly in a clockwise direction. Two pairs of baffles 24 are fixedly arranged on the telescopic ends of the second hydraulic cylinders 23, and the baffles 24 are located in the first card slot 5. The first fixed seat 21 and the second fixed seat 22 are relatively fixed with the first clamping seat 11 and the second clamping seat 13 respectively to fit and correspond. The second fixed seat 22 can be flipped along with the second clamping seat 13, and can be synchronously extended and retracted through the equidistantly arranged second hydraulic cylinders 23. With the help of the baffles 24, the equipment can be clamped on the outside of the pipeline, and the first card slot 5 can be concentric with the pipeline.

[0022] As a further solution of the present invention, the driving structure 3 includes a first driving seat 31, a second driving seat 32, a sliding rod 33, a toothed plate 34, two pairs of motors 35 and two pairs of gears 36; the first driving seat 31 is an arc-shaped structure, and a first annular groove 7 connected to the front side wall is opened in the middle of the first driving seat 31, the first driving seat 31 is fixedly arranged on the front side wall of the first card seat, and the first driving seat 31 is matched with the first card groove 5, the second driving seat 32 is fixedly arranged on the front side wall of the second card seat, and the second driving seat 32 is matched with the second card groove 6, the second driving seat 32 is provided with a second annular groove 8 corresponding to the first annular groove 7, the sliding rod 33 is an arc-shaped round rod structure, and the sliding rod 33 is movably inserted in the first annular groove In the groove 7, one end of the tooth plate 34 movably passes through the front side of the first annular groove 7 and is connected to the front side wall of the slide bar 33. The tooth plate 34 is an arc-shaped structure, and a plurality of teeth are provided in the middle of the outer wall of the tooth plate 34. Two pairs of motors 35 are equidistantly arranged on the outer walls of the first drive seat 31 and the second drive seat 32, respectively. Two pairs of gears 36 are fixedly arranged on the driving ends of the motors 35, respectively, and the gears 36 are meshed with the tooth plate 34; the motor 35 drives the gear 36 to rotate, and the gear 36 is meshed with the tooth plate 34 to drive the tooth plate 34 to rotate in the first annular groove 7 and the second annular groove 8 with the help of the slide bar 33, so that the tooth plate 34 passes through the first drive seat 31 and the second drive seat 32 360 degrees.

[0023] As a further scheme of the present invention, the welding structure 4 includes a welding arm 41, a third hydraulic cylinder 42, a lifting arm 43 and a welding gun body 44; one end of the welding arm 41 is fixedly arranged in the middle of the outer wall of the tooth plate 34 and is located in front of the teeth, the other end of the welding arm 41 is located in front of the tooth plate 34, and a lifting port is opened in the middle of the other end of the welding arm 41, one end of the third hydraulic cylinder 42 is fixedly arranged on the other end of the welding arm 41, one end of the lifting arm 43 movably passes through the lifting port, and the other end of the lifting arm 43 is connected to the telescopic end of the third hydraulic cylinder 42, and the welding gun body 44 is fixedly arranged on one end of the lifting arm 43; the welding arm 41 is driven to rotate around the pipeline by the 360-degree rotation of the tooth plate 34 to realize circumferential welding of the welding gun body 44, and different pipeline diameters are adjusted by the third hydraulic cylinder 42 to drive the lifting arm 43 to lift and lower the distance of the welding gun body 44 relative to the outer wall of the pipeline.

[0024] As a further solution of the present invention, after the first clamp seat 11 and the second clamp seat 13 are docked, the first slot 5 and the second slot 6 are spliced ​​into a 280-degree arc inner wall, which is used for design requirements, is easy to install on the outer wall of the pipe and is conducive to the circular rotation of the tooth plate 34.

[0025] As a further solution of the present invention, the slide rod 33 and the tooth plate 34 are both 180-degree arc structures, which are used for design requirements to enable the slide rod 33 and the tooth plate 34 to be effectively forced to enter the second drive seat 32 from the first drive seat 31, that is, through the 90-degree opening.

[0026] As a further solution of the present invention, the tooth plate 34 slides along the circumference of the first drive seat 31 and the second drive seat 32, and the tooth plate 34 is always engaged with the gear 36, which is used for design requirements to ensure that the tooth plate 34 is always in contact with the gear 36.

[0027] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process. The specific work is as follows.

[0028] First, the connection unit can be used through the charging port or power port on the first clamping seat 11; it can also be powered by the battery 18 under the box cover 14; When in use, the device is lifted by exerting force on the handrail 16 with both hands, and then the control keyboard on the box cover 14 is used to control the first hydraulic cylinder 15 to contract through the control panel group 17 with the help of the power supply of the battery 18. As the first hydraulic cylinder 15 contracts, the flip arm 12 is driven to flip upward, and the second clamping seat 13 is flipped by force, opening the 90-degree opening between one end of the second clamping seat 13 and one end of the first clamping seat 11 to increase the opening range, so that the device can be clamped on the pipeline through the first clamping slot 5 of the first clamping seat 11, and then the first hydraulic cylinder 15 is driven to extend to reset the second clamping seat 13 to support the outer wall of the pipeline; If the diameter of the outer wall of the pipe is smaller than the diameter of the first clamping groove 5 and the second clamping groove 6, the first clamping seat 11 and the second clamping seat 13 are docked and clamped on the outer wall of the pipe, and the second hydraulic cylinder 23 in the fixing structure 2 is driven to extend synchronously. As the second hydraulic cylinder 23 extends, it contacts the outer wall of the pipe through the stopper 24 for support and fixation. Since the second hydraulic cylinder 23 is equidistantly arranged, the first clamping groove 5 is positioned concentrically with the center of the pipe opening after synchronous movement. Then, the motor 35 in the driving structure 3 can be controlled to drive the gear 36 to rotate, and the gear 36 and the toothed plate 34 are engaged and transmitted, driving the toothed plate 34 to slide in the first annular groove 7 of the first driving seat 31 and enter the second annular groove 8 of the second driving seat 32 with the help of the slide bar 33. When the toothed plate 34 is separated from the first driving seat 31, the toothed plate 34 and the slide bar 33 are continuously conveyed by the gear 36 to slide out of the second annular groove 8, and pass through the 90-degree opening to enter the first annular groove 7 again to form a circular motion. At this time, the welding torch body 44 can be used for circular motion welding, and different pipe diameters drive the third hydraulic cylinder 42 on the welding arm 41 in the welding structure 4 to contract and adjust the lowering height of the lifting arm 43, that is, to adjust the distance between the welding torch body 44 and the outer wall for calibration; In actual operation, the flipping of the second clamping seat 13 will drive the second driving seat 32 and the second fixing seat 22 respectively. At this time, the slide plate and the slide bar 33 are both located in the first driving seat 31 .

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heating pipeline circumferential seam welding device, characterized in that: The invention comprises a main structure (1), a fixing structure (2), a driving structure (3) and a welding structure (4); the fixing structure (2) is fixedly arranged at the middle of the rear side of the main structure (1), the driving structure (3) is fixedly arranged at the middle of the front side of the main structure (1), and the welding structure (4) is fixedly arranged on the driving structure (3).

2. A heating pipeline circumferential seam welding device according to claim 1, characterized in that: The main structure (1) comprises a first clamping seat (11), a pair of flip arms (12), a second clamping seat (13), a box cover (14), a first hydraulic cylinder (15), a pair of armrests (16), a control panel group (17) and a battery (18); The first clamp seat (11) is L-shaped, and an arc-shaped first slot (5) is provided between the two ends of the first clamp seat (11); one end of the first clamp seat (11) is a cavity structure without an upper wall; the side wall of the other end of the first clamp seat (11) is provided with a charging port and a power connection port; the pair of flip arms (12) are both T-shaped rods and have three ends; the top ends of the pair of flip arms (12) are movably arranged at the bottom of one end of the first clamp seat (11) and are respectively located symmetrically on the front and rear side walls; the second clamp seat (13) is arc-shaped, and a second slot (6) with the same diameter as the first slot (5) is provided on the right side of the second clamp seat (13); one end of the second clamp seat (13) is fixedly arranged on the pair of flip arms (12) The box cover (14) is detachably mounted on the upper wall of one end of the first clamping seat (11), and a control keyboard is arranged on the upper wall of one end of the box cover (14). One end of the first hydraulic cylinder (15) is movably connected to the left side wall of one end of the first clamping seat (11), and the other end of the first hydraulic cylinder (15) is tilted and movably connected between the left ends of a pair of flip arms (12). A pair of handrails (16) are respectively arranged on the right side wall of the other end of the first clamping seat (11). The control panel group (17) is fixedly arranged on the inner lower wall of the first clamping seat (11) and close to the left end. The storage battery (18) is fixedly arranged on the inner lower wall of the first clamping seat (11) and close to the right end.

3. A heating pipeline circumferential seam welding device according to claim 2, characterized in that: The fixing structure (2) comprises a first fixing seat (21), a second fixing seat (22), two pairs of second hydraulic cylinders (23) and two pairs of stoppers (24); The first fixing seat (21) is a semicircular structure. The first fixing seat (21) is fixedly arranged on the rear side wall of the first clamping seat (11) and corresponds to the first clamping slot (5) of the first clamping seat (11). The second fixing seat (22) is arc-shaped and has the same diameter as the first fixing seat (21). The second fixing seat (22) is fixedly arranged on the rear side wall of the second clamping seat (13) and is connected to the first fixing seat (21). The second fixing seat (22) is matched with the second clamping slot (6). Two pairs of the second hydraulic cylinders (23) are respectively fixedly passed through the first fixing seat (21) and the second fixing seat (22) at both ends and are arranged equidistantly in a clockwise direction. Two pairs of the blocking pads (24) are respectively fixedly arranged on the telescopic ends of the second hydraulic cylinders (23), and the blocking pads (24) are located in the first clamping slot (5).

4. A heating pipeline circumferential seam welding device according to claim 3, characterized in that: The driving structure (3) comprises a first driving seat (31), a second driving seat (32), a sliding rod (33), a toothed plate (34), two pairs of motors (35) and two pairs of gears (36); The first drive seat (31) is an arc-shaped structure, and a first annular groove (7) communicating with the front side wall is opened in the middle of the first drive seat (31); the first drive seat (31) is fixedly arranged on the front side wall of the first card seat, and the first drive seat (31) is matched with the first card slot (5); the second drive seat (32) is fixedly arranged on the front side wall of the second card seat, and the second drive seat (32) is matched with the second card slot (6); the second drive seat (32) is opened with a second annular groove (8) corresponding to the first annular groove (7); the slide bar (33) is an arc-shaped circular The slide bar (33) is movably inserted into the first annular groove (7), one end of the tooth plate (34) movably penetrates the front side of the first annular groove (7) and is connected to the front side wall of the slide bar (33), the tooth plate (34) is an arc-shaped structure, and a plurality of teeth are provided in the middle of the outer wall of the tooth plate (34), the two pairs of motors (35) are respectively equidistantly arranged on the outer walls of the first drive seat (31) and the second drive seat (32), the two pairs of gears (36) are respectively fixedly arranged on the driving ends of the motors (35), and the gears (36) are meshed with the tooth plate (34).

5. The heating pipeline circumferential seam welding equipment according to claim 4 is characterized in that: The welding structure (4) comprises a welding arm (41), a third hydraulic cylinder (42), a lifting arm (43) and a welding gun body (44); One end of the welding arm (41) is fixedly arranged at the middle of the outer wall of the tooth plate (34) and is located in front of the tooth teeth; the other end of the welding arm (41) is located in front of the tooth plate (34); and a lifting opening is opened in the middle of the other end of the welding arm (41); one end of the third hydraulic cylinder (42) is fixedly arranged on the other end of the welding arm (41); one end of the lifting arm (43) movably passes through the lifting opening; and the other end of the lifting arm (43) is connected to the telescopic end of the third hydraulic cylinder (42); and the welding gun body (44) is fixedly arranged on one end of the lifting arm (43).

6. The heating pipeline circumferential seam welding equipment according to claim 5, characterized in that: After the first clamping seat (11) and the second clamping seat (13) are butt-jointed, the first clamping groove (5) and the second clamping groove (6) thereof are spliced ​​to form a 280-degree arc-shaped inner wall.

7. The heating pipeline circumferential seam welding equipment according to claim 6, characterized in that: The sliding rod (33) and the tooth plate (34) are both 180-degree arc-shaped structures.

8. The heating pipeline circumferential seam welding equipment according to claim 7, characterized in that: The toothed plate (34) slides along the circumference of the first drive seat (31) and the second drive seat (32), and the toothed plate (34) is always in mesh with the gear (36).

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