A heat pipe ring seam welding apparatus

Abstract

The application relates to the technical field of welding equipment, and particularly discloses a heat supply pipeline ring seam welding equipment which comprises a main body structure, a fixing structure, a driving structure and a welding structure. The fixing structure is fixedly arranged at the middle part of the rear side of the main body structure, the driving structure is fixedly arranged at the middle part of the front side of the main body structure, and the welding structure is fixedly arranged on the driving structure. Through the fixing structure, the pipelines with diameters smaller than the inner wall diameter of the ring-shaped socket in the application can be clamped and fixed by synchronously adjusting the positions of the blocking pads according to the diameters. Then, the first driving seat and the second driving seat are correspondingly and synchronously turned and clamped with the first clamping seat and the second clamping seat, and the circumferential movement is realized by the force of the 180-degree arc-shaped toothed plate and the slide rod, so that the welding machine structure is driven to move circumferentially, the 90-degree opening part can be crossed, and the outer wall ring seam welding of pipelines with different diameters is effectively realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding equipment, in particular to a heat supply pipeline girth welding equipment. BACKGROUND

[0002] The laying of heat supply pipelines requires the pipeline to be erected, fixed and connected through butt welding, and the commonly used welding methods for heat supply pipelines include butt welding (such as argon arc welding and electric arc welding) and resistance welding. Since the pipeline opening is circular, a girth is formed after butt connection, and therefore high stability needs to be maintained during welding, and welding is usually performed using welding equipment, which is difficult for manual welding. However, the existing welding machines need to be manually installed and fixed at the pipeline opening before use, which is complicated to operate and time-consuming, and is mainly applied to single-diameter pipelines. Therefore, the present application designs a heat supply pipeline girth welding equipment. SUMMARY

[0003] The present application aims to provide a heat supply pipeline girth welding equipment to solve the problems raised in the background.

[0004] To achieve the above problem-solving, the present application provides the following technical solution: a heat supply pipeline girth welding equipment, comprising a main body structure, a fixing structure, a driving structure and a welding structure; the fixing structure is fixedly arranged at the middle part of the rear side of the main body structure, the driving structure is fixedly arranged at the middle part of the front side of the main body structure, and the welding structure is fixedly arranged on the driving structure.

[0005] Preferably, the main body structure comprises a first clamping seat, a pair of turnover arms, a second clamping seat, a box cover, a first hydraulic cylinder, a pair of handrails, a control panel group and a storage battery; the first clamping seat is L-shaped, and an arc-shaped first clamping groove is formed 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 other end of the first clamping seat is provided with a charging port and a power connection port; the pair of turnover arms are T-shaped rods and each has three ends; the top ends of the pair of turnover arms are movably arranged at the bottom of one end of the first clamping seat and are symmetrically located on the front and rear side walls; the second clamping seat is arc-shaped, and a second clamping groove with the same diameter as the first clamping groove is formed on the right side of the second clamping seat; one end of the second clamping seat is fixedly arranged between the bottom ends of the pair of turnover arms, and the second clamping seat is in engagement with the first clamping seat; the box cover is detachably buckled on the upper wall of one end of the first clamping 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 clamping seat, and the other end of the first hydraulic cylinder is movably connected between the left ends of the pair of turnover arms; the pair of handrails are arranged on the right side walls of the other end of the first clamping seat; the control panel group is fixedly arranged on the inner lower wall of the first clamping seat close to the left end; and the storage battery is fixedly arranged on the inner lower wall of the first clamping seat close to the right end.

[0006] Preferably, the fixing structure comprises a first fixing seat, a second fixing seat, two pairs of second hydraulic cylinders and two pairs of stop pads; the first fixing seat is a semicircular structure, is fixedly arranged on the rear side wall of the first clamping seat and corresponds to the first clamping groove of the first clamping seat, the second fixing seat is arc-shaped and has the same diameter as the first fixing seat, is fixedly arranged on the rear side wall of the second clamping seat and is opposite to the first fixing seat, the second fixing seat is matched with the second clamping groove, and the two pairs of second hydraulic cylinders are respectively fixedly penetrated through the two ends of the first fixing seat and the second fixing seat and are arranged at equal intervals in a clockwise direction, the two pairs of stop pads are respectively fixedly arranged on the telescopic ends of the second hydraulic cylinders and are located in the first clamping groove.

[0007] Preferably, the driving structure comprises a first driving seat, a second driving seat, a sliding rod, a toothed plate, two pairs of motors and two pairs of gears.

[0008] The first driving seat is arc-shaped, a first annular groove is formed in the middle of the first driving seat and communicates with the front side wall, the first driving seat is fixedly arranged on the front side wall of the first clamping seat and is matched with the first clamping groove, the second driving seat is fixedly arranged on the front side wall of the second clamping seat and is matched with the second clamping 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, is movably inserted into the first annular groove, one end of the toothed plate is movably penetrated through the front side of the first annular groove and is connected with the front side wall of the sliding rod, the toothed plate is arc-shaped, a plurality of teeth are formed in the middle of the outer side wall of the toothed plate, the two pairs of motors are respectively arranged at equal intervals on the outer side walls of the first driving seat and the second driving seat, and the two pairs of gears are respectively fixedly arranged on the driving ends of the motors and are engaged with the toothed plate.

[0009] Preferably, the welding structure comprises a welding arm, a third hydraulic cylinder, a lifting arm and a welding gun body.

[0010] One end of the welding arm is fixedly arranged in the middle of the outer side wall of the toothed plate and located on the front side of the tooth, the other end of the welding arm is located on the front side of the toothed plate, a lifting opening is formed 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 is movably penetrated through the lifting opening, the other end of the lifting arm is connected with the telescopic end of the third hydraulic cylinder, and the welding gun body is fixedly arranged on one end of the lifting arm.

[0011] Preferably, after the first clamping seat and the second clamping seat are butted, the first clamping groove and the second clamping groove are spliced into a 280-degree arc-shaped inner wall.

[0012] Preferably, the sliding rod and the toothed plate are both 180-degree arc-shaped structures.

[0013] Preferably, the toothed plate slides along the first driving seat and the second driving seat, and the toothed plate is always engaged with the gear.

[0014] The heating pipeline ring seam welding equipment has the advantages that: the first clamping seat and the second clamping seat form a 280-degree annular bayonet for clamping on the pipeline, and the second clamping seat can be flipped relative to the first clamping seat to increase the space of a 90-degree opening, facilitating the installation of the equipment on the pipeline; secondly, through the fixing structure, the pipelines with diameters smaller than the inner wall diameter of the annular bayonet in the case can be clamped and fixed by synchronously adjusting the position of the stop pad according to the diameter; then, the first driving seat and the second driving seat are correspondingly flipped and clamped synchronously with the first clamping seat and the second clamping seat, and the 180-degree arc-shaped toothed plate and the slide rod are stressed to move circumferentially, driving the welding machine structure to move circumferentially, which can cross the 90-degree opening part and effectively fit the outer wall ring seam welding of pipelines with different diameters; in summary, the equipment has the following effects:

[0015] 1. The first clamping seat and the second clamping seat form a 280-degree annular bayonet, and the second clamping seat can be flipped to surround the pipeline to a large extent, providing a relatively stable pre-installation basis; and the second clamping seat can be flipped relative to the first clamping seat to increase the space of a 90-degree opening, which greatly facilitates the installation of the equipment on the pipeline, avoids installation difficulties caused by space limitations, and does not require manual intervention for manual fixing.

[0016] 2. The design of the flipable opening space makes the equipment have good adaptability to different pipeline installation positions and angles; for example, when the pipeline is at a high position or an inclined position, the operator can more conveniently adjust the clamping seat position to accurately fix the equipment on the pipeline, reducing the difficulty and risk in the installation process.

[0017] 3. The fixing structure can clamp and fix the pipelines with diameters smaller than the inner wall diameter of the annular bayonet in the case, and the position of the stop pad can be synchronously adjusted according to the diameter of the pipeline; it has strong universality and can adapt to pipelines with different diameters.

[0018] 4. The first driving seat and the second driving seat are correspondingly flipped and clamped synchronously with the first clamping seat and the second clamping seat, and the 180-degree arc-shaped toothed plate and the slide rod are stressed to move circumferentially, which can drive the welding structure to move circumferentially. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the assembly structure of the present application;

[0020] Figure 2 It is a schematic diagram of the main structure of the present application;

[0021] Figure 3 It is the schematic diagram of the body structure rear view structure of the present application;

[0022] Figure 4 It is the schematic diagram of the fixed structure split structure of the present application;

[0023] Figure 5 It is the schematic diagram of the fixed structure and body structure assembly structure of the present application;

[0024] Figure 6 It is the schematic diagram of the drive structure split structure of the present application;

[0025] Figure 7 It is the schematic diagram of the welding structure split structure of the present application;

[0026] Figure 8 It is the schematic diagram of the welding structure assembly structure of the present application.

[0027] In the figure: 1, body structure, 11, first clamp seat, 12, turnover arm, 13, second clamp seat, 14, box cover, 15, first hydraulic cylinder, 16, handrail, 17, control board group, 18, storage battery, 2, fixed structure, 21, first fixed seat, 22, second fixed seat, 23, second hydraulic cylinder, 24, stop pad, 3, drive structure, 31, first drive seat, 32, second drive seat, 33, slide rod, 34, toothed plate, 35, motor, 36, gear, 4, welding structure, 41, welding arm, 42, third hydraulic cylinder, 43, lifting arm, 44, welding gun body, 5, first clamping groove, 6, second clamping groove, 7, first ring groove, 8, second ring groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Please refer to Figures 1-8 The present application provides a technical solution: a heat supply pipeline circular seam welding device, comprising a body structure 1, a fixed structure 2, a drive structure 3 and a welding structure 4; the fixed structure 2 is fixedly arranged at the middle part of the rear side of the body structure 1, the drive structure 3 is fixedly arranged at the middle part of the front side of the body structure 1, and the welding structure 4 is fixedly arranged on the drive structure 3; the body structure 1 is fitted with a pipeline, the fixed structure 2 is adjusted and clamped according to different diameters of the pipeline, and the drive structure 3 drives the welding structure 4 to rotate 360 degrees around the pipeline on the body structure 1.

[0030] As a further scheme of the present application, the main body structure 1 comprises a first clamping seat 11, a pair of turnover arms 12, a second clamping seat 13, a box cover 14, a first hydraulic cylinder 15, a pair of handrails 16, a control panel group 17 and a storage battery 18; the first clamping seat 11 is L-shaped, and a first clamping groove 5 in an arc shape is arranged 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 a charging port and an electricity connection port are arranged on the side wall of the other end of the first clamping seat 11; the pair of turnover arms 12 are T-shaped rods and have three ends; the top ends of the pair of turnover arms 12 are movably arranged on the bottom of one end of the first clamping seat 11 and are symmetrically arranged on the front and rear side walls respectively; the second clamping seat 13 is arc-shaped, and a second clamping groove 6 with the same diameter as the first clamping groove 5 is arranged on the right side of the second clamping seat 13; one end of the second clamping seat 13 is fixedly arranged between the bottom ends of the pair of turnover arms 12, and the second clamping seat 13 is in engagement with the first clamping seat 11; the box cover 14 is detachably buckled 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 obliquely movably connected between the left ends of the pair of turnover arms 12; the pair of handrails 16 are 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; and the storage battery 18 is fixedly arranged on the inner lower 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 power supply of the storage battery 18, the second clamping seat 13 is turned over by the pair of turnover arms 12, the 90-degree opening space between the second clamping seat 13 and the first clamping seat 11 is increased, and the device is facilitated to be clamped on the corresponding pipeline.

[0031] As a further scheme of the present application, the fixed structure 2 comprises a first fixed seat 21, a second fixed seat 22, two pairs of second hydraulic cylinders 23 and two pairs of stop pads 24; the first fixed seat 21 is a semicircular structure, the first fixed seat 21 is fixedly arranged on the rear side wall of the first clamping seat 11 and corresponds to the first clamping groove 5 of the first clamping seat 11; the second fixed seat 22 is arc-shaped and has the same diameter as the first fixed seat 21; the second fixed seat 22 is fixedly arranged on the rear side wall of the second clamping seat 13 and is in engagement with the first fixed seat 21; the second fixed seat 22 is in engagement with the second clamping groove 6; the two pairs of second hydraulic cylinders 23 are fixedly arranged through the two ends of the first fixed seat 21 and the second fixed seat 22 and are arranged at equal intervals in a clockwise direction; the two pairs of stop pads 24 are fixedly arranged on the extension and retraction ends of the second hydraulic cylinders 23 and are located in the first clamping groove 5; the first fixed seat 21 and the second fixed seat 22 are fixedly arranged in engagement with the first clamping seat 11 and the second clamping seat 13 respectively; the second fixed seat 22 can turn over with the second clamping seat 13; the second hydraulic cylinders 23 are synchronously extended and retracted at equal intervals; the stop pads 24 are in contact with the pipeline; the device can be clamped on the outside of the pipeline; and the first clamping groove 5 is concentric with the pipeline.

[0032] As a further scheme of the present application, the driving structure 3 comprises a first driving seat 31, a second driving seat 32, a slide rod 33, a toothed plate 34, two pairs of motors 35 and two pairs of gears 36; the first driving seat 31 is in an arc shape, and a first annular groove 7 is formed in the middle of the first driving seat 31 and communicates with the front side wall; the first driving seat 31 is fixedly arranged on the front side wall of the first clamping seat, and the first driving seat 31 is matched with the first clamping groove 5; the second driving seat 32 is fixedly arranged on the front side wall of the second clamping seat, and the second driving seat 32 is matched with the second clamping groove 6; the second driving seat 32 is provided with a second annular groove 8 corresponding to the first annular groove 7; the slide rod 33 is in an arc shape of a round rod structure, and is movably inserted into the first annular groove 7; one end of the toothed plate 34 is movably penetrated through the front side of the first annular groove 7 and connected with the front side wall of the slide rod 33; the toothed plate 34 is in an arc shape, and a plurality of teeth are formed in the middle of the outer side wall of the toothed plate 34; the two pairs of motors 35 are equidistantly arranged on the outer side walls of the first driving seat 31 and the second driving seat 32, respectively; and the two pairs of gears 36 are fixedly arranged on the driving ends of the motors 35, and the gears 36 are engaged with the toothed plate 34; the gears 36 are driven to rotate by the motors 35, the toothed plate 34 is driven to rotate by the engagement of the gears 36 and the toothed plate 34, and the toothed plate 34 is circularly rotated in the first annular groove 7 and the second annular groove 8 by the slide rod 33, so as to realize the 360-degree rotation of the toothed plate 34 through the first driving seat 31 and the second driving seat 32.

[0033] As a further scheme of the present application, 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 on the middle of the outer side wall of the toothed plate 34 and located on the front side of the teeth; the other end of the welding arm 41 is located on the front side of the toothed plate 34, and a lifting opening is formed 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 is movably penetrated through the lifting opening, and the other end of the lifting arm 43 is connected with 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 toothed plate 34, so as to realize the circular welding of the welding gun body 44; and the distance between the welding gun body 44 and the outer side wall of the pipeline is adjusted by the lifting of the lifting arm 43 driven by the third hydraulic cylinder 42.

[0034] As a further scheme of the present application, the first clamping groove 5 and the second clamping groove 6 are spliced into a 280-degree arc-shaped inner wall after the first clamping seat 11 and the second clamping seat 13 are butted, which is convenient for installation on the outer wall of the pipeline and is conducive to the circular rotation of the toothed plate 34.

[0035] As a further scheme of the present application, the slide rod 33 and the toothed plate 34 are both in an arc shape of 180 degrees, which is convenient for the slide rod 33 and the toothed plate 34 to be effectively stressed from the first driving seat 31 to the second driving seat 32, i.e., to pass through the opening part of 90 degrees.

[0036] As a further scheme of the present application, the toothed plate 34 slides along the first drive base 31 and the second drive base 32, and the toothed plate 34 is always engaged with the gear 36, for design requirements, to realize that the toothed plate 34 is always in contact with the gear 36 under force.

[0037] The detailed connection means is a technology known in the art, and the working principle and process are mainly described below. The specific work is as follows.

[0038] Firstly, the connection unit can be connected through the charging port or the power connection port on the first clamping seat 11; or the power supply can be used through the battery 18 below the box cover 14.

[0039] When in use, the device is lifted by two hands with the help of the handrails 16, and then the control keyboard on the box cover 14 is used to control the first hydraulic cylinder 15 to retract through the power supply of the battery 18 and the control panel group 17. With the retraction of the first hydraulic cylinder 15, the turnover arm 12 is turned upward, and the second clamping seat 13 is turned under force, opening the 90-degree opening part at one end of the second clamping seat 13 and one end of the first clamping seat 11, thereby increasing the opening range. The device can be clamped on the pipeline through the first clamping groove 5 of the first clamping seat 11, and then the second clamping seat 13 is reset to hold the outer wall of the pipeline by driving the first hydraulic cylinder 15 to elongate.

[0040] If the diameter of the outer wall of the pipeline is smaller than the diameters of the first clamping groove 5 and the second clamping groove 6, the first clamping seat 11 and the second clamping seat 13 are butted and clamped on the outer wall of the pipeline, and the second hydraulic cylinder 23 in the fixed structure 2 is driven to elongate synchronously. With the elongation of the second hydraulic cylinder 23, the outer wall of the pipeline is contacted and held by the stop pad 24. Since the second hydraulic cylinder 23 is equidistantly arranged, the first clamping groove 5 is positioned concentrically with the center of the pipeline opening after synchronous movement.

[0041] Then the motor 35 in the driving structure 3 is controlled to drive the gear 36 to rotate, the gear 36 is engaged with the toothed plate 34 for transmission, the toothed plate 34 is forced to slide in the first ring groove 7 of the first drive base 31 through the slide rod 33, enters the second ring groove 8 of the second drive base 32, and when the toothed plate 34 is separated from the first drive base 31, the toothed plate 34 and the slide rod 33 are slid out of the second ring groove 8 through the continuous transmission of the gear 36, pass through the 90-degree opening part again, and enter the first ring groove 7 to form a circular motion.

[0042] At this time, the circular motion welding processing can be performed through the welding gun body 44, and the third hydraulic cylinder 42 on the welding arm 41 in the welding structure 4 is retracted to adjust the height of the lifting arm 43 to lower the distance of the welding gun body 44 relative to the outer wall for calibration.

[0043] In actual operation, the overturning of the second clamping seat 13 drives the second driving seat 32 and the second fixed seat 22, at this time, the sliding plate and the sliding rod 33 are located in the first driving seat 31.

[0044] While the embodiments of the application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A heat pipe girth welding apparatus, characterized by: Including main body structure (1), fixed structure (2), drive structure (3) and welding structure (4);The fixed structure (2) is fixedly arranged in the middle part of the rear side of the main body structure (1), the drive structure (3) is fixedly arranged in the middle part of the front side of the main body structure (1), and the welding structure (4) is fixedly arranged on the drive structure (3); The main body structure (1) includes a first clamp seat (11), a pair of turnover arms (12), a second clamp seat (13), a box cover (14), a first hydraulic cylinder (15), a pair of handrails (16), a control board group (17) and a storage battery (18); The first clamp seat (11) is L-shaped, and a first clamping groove (5) is formed between the two ends of the first clamp seat (11), the first clamp seat (11) is a cavity structure without upper wall at one end, and a charging port and an electrical connection port are arranged on the side wall of the other end of the first clamp seat (11), a pair of the turnover arms (12) are T-shaped rods and have three ends, the top ends of a pair of the turnover arms (12) are movably arranged on the bottom of one end of the first clamp seat (11) and are symmetrically arranged on the front and rear side walls respectively, the second clamp seat (13) is arc-shaped, and a second clamping groove (6) with the same diameter as the first clamping groove (5) is formed in the right side of the second clamp seat (13), one end of the second clamp seat (13) is fixedly arranged between the bottom ends of the pair of turnover arms (12), and the second clamp seat (13) is connected and matched with the first clamp seat (11), the box cover (14) is detachably buckled on the upper wall of one end of the first clamp 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 clamp seat (11), and the other end of the first hydraulic cylinder (15) is movably connected between the left ends of the pair of turnover arms (12), a pair of the handrails (16) are arranged on the right side wall of the other end of the first clamp seat (11), the control board group (17) is fixedly arranged on the inner lower wall of the first clamp seat (11) and close to the left end, and the storage battery (18) is fixedly arranged on the inner lower wall of the first clamp seat (11) and close to the right end; The fixed structure (2) includes a first fixed seat (21), a second fixed seat (22), two pairs of second hydraulic cylinders (23) and two pairs of stop pads (24); The first fixed seat (21) is a semicircular structure, the first fixed seat (21) is fixedly arranged on the rear side wall of the first clamping seat (11) and corresponds to the first clamping groove (5) of the first clamping seat (11), the second fixed seat (22) is arc-shaped, the diameter of the second fixed seat (22) is the same as that of the first fixed seat (21), the second fixed seat (22) is fixedly arranged on the rear side wall of the second clamping seat (13) and is opposite to the first fixed seat (21), the second fixed seat (22) is matched with the second clamping groove (6), two pairs of the second hydraulic cylinders (23) are respectively fixedly penetrated through the two ends of the first fixed seat (21) and the second fixed seat (22) and are arranged at equal intervals in a clockwise direction, and two pairs of the stop pads (24) are respectively fixedly arranged on the telescopic ends of the second hydraulic cylinders (23) and are located in the first clamping groove (5). 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 driving seat (31) is arc-shaped, a first annular groove (7) in communication with the front side wall is formed 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 clamping seat and is matched with the first clamping groove (5), the second driving seat (32) is fixedly arranged on the front side wall of the second clamping seat and is matched with the second clamping 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, the sliding rod (33) is movably inserted into the first annular groove (7), one end of the toothed plate (34) is movably penetrated through the front side of the first annular groove (7) and is connected with the front side wall of the sliding rod (33), the toothed plate (34) is arc-shaped, a plurality of teeth are formed in the middle of the outer side wall of the toothed plate (34), two pairs of the motors (35) are respectively arranged at equal intervals on the outer side walls of the first driving seat (31) and the second driving seat (32), and two pairs of the gears (36) are respectively fixedly arranged on the driving ends of the motors (35) and are engaged with the toothed plate (34). After the first clamping seat (11) and the second clamping seat (13) are connected, the first clamping groove (5) and the second clamping groove (6) are spliced into a 280-degree arc-shaped inner wall, the sliding rod (33) and the toothed plate (34) are both 180-degree arc-shaped structures, the toothed plate (34) slides along the circumferences of the first driving seat (31) and the second driving seat (32) and is always engaged with the gears (36).

2. A heat pipe ring seam welding apparatus according to claim 1, characterised 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 on the middle part of the outer side wall of the toothed plate (34) and located on the front side of the tooth, the other end of the welding arm (41) is located on the front side of the toothed plate (34), and the middle part of the other end of the welding arm (41) is provided with a lifting opening; 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) is movably penetrated into the lifting opening, and the other end of the lifting arm (43) is connected with 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).

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