Vertical seam welding device for boiler

Abstract

The present application discloses a vertical ring seam welding device of a boiler, relates to the field of ring seam welding, and comprises a bottom plate and a vertical ring seam welding machine, wherein the vertical ring seam welding machine is installed on the upper surface of the bottom plate, a mounting frame is fixedly installed on one side of the upper surface of the bottom plate, a moving mechanism is arranged on one side of the vertical ring seam welding machine, the moving mechanism is installed on the top of the bottom plate, and a cleaning mechanism is arranged on the inner side of the mounting frame. In the present application, the rotation of the disc, the second gear and the push rod is used to control the movement of the swing rod, the first gear and the first gear ring are used to enable the rotating rod to rotate, the swing rod drives the cleaning brush to clean the welding seam of the outer wall of the boiler in the back-and-forth swinging and self-rotating mode, so that the water on the surface of the boiler is cleaned, in addition, cleaning agents can be added to the cleaning brush to treat grease and dirt, so as to avoid the generation of bubbles during the welding process, the explosion caused by the bubbles, or the release of harmful gases and smoke to affect the processing environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ring seam welding, in particular to a welding device for vertical ring seams of a boiler. BACKGROUND

[0002] Ring seam welding is a type of welding for circular or ring-shaped welds, and the welded seam is a closed circular ring. Welding, also known as fusion, is a manufacturing process and technology that joins metal or other thermoplastic materials such as plastics using heat, high temperature, or high pressure. When welding ring seams on circular components such as boilers, a vertical ring seam welding machine is usually used for processing.

[0003] However, in the prior art, if the boiler is not thoroughly cleaned before welding, water may be present on the welding surface. When the welding arc is heated, the water and gas may evaporate and form bubbles, which can form holes inside the weld, reducing the strength of the welded joint. If the bubbles accumulate too much, they may even cause the welded joint to explode, causing serious safety accidents.

[0004] In addition, during the welding process, oil and dirt that have not been removed from the surface of the boiler may be heated and release harmful gases and fumes, such as carbon monoxide and volatile organic compounds. These dangerous gases pose a threat to the health of welders, may cause respiratory and skin problems, and long-term exposure can even lead to chronic health problems. SUMMARY

[0005] The present application aims to provide a welding device for vertical ring seams of a boiler to solve the problem of water, oil, and dirt that have not been removed from the surface of the boiler during the welding process, which may evaporate and form bubbles or be heated and release harmful gases and fumes. The bubbles form holes inside the weld, reducing the strength of the welded joint. Carbon monoxide and volatile organic compounds, these dangerous gases pose a threat to the health of welders, may cause respiratory and skin problems, and long-term exposure can even lead to chronic health problems.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a welding device for vertical ring seams of a boiler, comprising a base plate and a vertical ring seam welding machine, the vertical ring seam welding machine is installed on the upper surface of the base plate, one side of the upper surface of the base plate is fixedly installed with a mounting bracket, one side of the vertical ring seam welding machine is provided with a moving mechanism, the moving mechanism is installed on the top of the base plate, the inner side of the mounting bracket is provided with a cleaning mechanism;

[0007] The cleaning mechanism comprises a lifting frame and a fixed column, the top end of the fixed column is fixedly connected with the lifting frame, the bottom of the lifting frame is provided with a movable assembly, the inner side of the lifting frame is provided with a transmission assembly;

[0008] The activity assembly includes a rotating disc and a swing rod, a limiting groove is formed in the middle of the swing rod, a push rod is slidably arranged in the limiting groove, one end of the push rod is fixedly connected with the rotating disc, one end of the swing rod is fixedly connected with a rotating shaft, the other end of the swing rod is rotatably connected with a rotating rod, and the top surface of the rotating rod is fixedly installed with a first gear.

[0009] The transmission assembly includes a connecting shell and a rotating sleeve, the rotating sleeve is rotatably installed on the surface of the fixed column, the bottom of the rotating sleeve is fixedly connected with the connecting shell, the bottom of the connecting shell is fixedly connected with a second gear ring, the inner side of the second gear ring is meshingly provided with a second gear, and one end of the second gear shaft is fixedly connected with the shaft of the rotating disc.

[0010] Preferably, the bottom of the fixed column is fixedly connected with a fixed plate, one end of the rotating shaft is rotatably connected with the fixed plate, one end of the second gear shaft is rotatably connected with the fixed plate, the bottom of the lifting frame is fixedly connected with a first gear ring, and the inner side of the first gear ring is meshed with the first gear.

[0011] Preferably, the top end surface of the fixed column is movably sleeved with a driven pulley, the top of the lifting frame is fixedly installed with a second drive motor, the output end of the second drive motor is fixedly connected with a driving pulley, the surfaces of the driving pulley and the driven pulley are sleeved with a synchronous belt, and the bottom of the driven pulley is fixedly connected with the rotating sleeve.

[0012] Preferably, the inner diameter of the connecting shell is greater than the diameters of the fixed column and the fixed plate, and the surface of the rotating rod is sleeved with a cleaning brush.

[0013] Preferably, the top of the mounting frame is installed with a second electric push rod, and the output end of the second electric push rod is fixedly connected with the top of the lifting frame.

[0014] Preferably, the moving mechanism includes a moving rail and a moving plate, the bottom of the moving rail is fixedly connected with a bottom plate, the surface of the moving rail is slidably sleeved with a sliding block, the top of the sliding block is fixedly connected with the bottom of the moving plate, the upper surface of the bottom plate is installed with a first electric push rod, and the output end of the first electric push rod is fixedly connected with a moving block.

[0015] Preferably, the top of the moving block is fixedly connected with the bottom of the moving plate, the surface of the moving plate is installed with a rotating assembly, and the rotating assembly is provided above a storage rack.

[0016] Preferably, the rotating assembly includes a rotating column and a first drive motor, the first drive motor is fixed on the surface of the moving plate through a support, the top of the rotating column is fixedly connected with the bottom of the storage rack, and the bottom of the rotating column is rotatably connected with the moving plate.

[0017] Preferably, a worm gear is fixedly mounted on the surface of the rotating column, and a worm is fixedly connected to the output end of the first drive motor, wherein the worm and the worm gear mesh.

[0018] Preferably, a fixing ring is fixedly connected to the bottom outer edge of the storage rack, and a limiting frame is fixedly installed on both sides of the top of the movable plate, with the fixing ring and the limiting frame being slidably connected.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In this invention, the movement of the swing rod is controlled by rotating the disc, the second gear, and the push rod. When the swing rod moves around the rotating shaft, it drives the cleaning brush at one end to move, thereby cleaning the weld seam on the outer wall of the boiler. During this process, the first gear, the first gear ring, and the rotating rod enable the cleaning brush to rotate during cleaning. This creates a back-and-forth swinging and rotational cleaning process, ensuring that moisture on the boiler surface is removed during cleaning. In addition, a cleaning agent can be added to the cleaning brush to treat grease and dirt, preventing the formation of bubbles during welding that could lead to an explosion, or the release of harmful gases and fumes during heating that could affect the processing environment and endanger human health.

[0021] 2. In this invention, the rotating sleeve is controlled to rotate by a drive motor, a drive pulley, a driven pulley, and a synchronous belt. This causes the rotating sleeve to rotate while simultaneously rotating the connecting shell. Consequently, multiple second gears on the inner wall of the second gear ring begin to rotate. Therefore, each second gear drives a rotating disk to rotate. This allows multiple moving components to move simultaneously when the drive motor is in motion, thereby improving cleaning efficiency.

[0022] 3. In this invention, the position of the boiler is controlled by the first electric push rod, the moving block, and the moving plate, which facilitates cleaning or welding work. During this process, the sliding block and the moving track are used to prevent shaking and collapse during movement. The first drive motor, the worm gear, and the worm wheel are used to drive the boiler to rotate, which not only facilitates welding of the boiler, but also further improves the cleaning effect during the cleaning process. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the welding device for the vertical circumferential seam of the boiler according to the present invention;

[0024] Figure 2 This is a partial structural schematic diagram of the welding device for the vertical circumferential seam of the boiler according to the present invention.

[0025] Figure 3 This is an exploded structural diagram of the cleaning mechanism in the welding device for the vertical circumferential seam of the boiler of the present invention.

[0026] Figure 4 The explosion structure diagram of the transmission assembly in the vertical ring seam welding device of the boiler of the present application;

[0027] Figure 5 The structure diagram of the first and second tooth rings of the vertical ring seam welding device of the boiler of the present application;

[0028] Figure 6 The structure diagram of the movable assembly in the vertical ring seam welding device of the boiler of the present application;

[0029] Figure 7 The structure diagram of the moving mechanism in the vertical ring seam welding device of the boiler of the present application;

[0030] Figure 8 The explosion structure diagram of the rotating assembly in the vertical ring seam welding device of the boiler of the present application.

[0031] In the figure: 1, vertical ring seam welding machine; 2, bottom plate; 3, moving mechanism; 31, moving track; 32, first electric push rod; 33, sliding block; 34, moving block; 35, moving plate; 36, storage rack; 37, rotating assembly; 371, limiting rack; 372, fixed ring; 373, first driving motor; 374, rotating column; 375, worm; 376, worm gear; 4, mounting rack; 5, second electric push rod; 6, cleaning mechanism; 61, lifting frame; 62, second driving motor; 63, driving pulley; 64, driven pulley; 65, synchronous belt; 66, movable assembly; 661, rotating shaft; 662, swing rod; 663, rotating disc; 664, push rod; 665, rotating rod; 666, first gear; 667, limiting groove; 668, first tooth ring; 67, fixed column; 671, fixed plate; 68, transmission assembly; 681, second tooth ring; 682, connecting shell; 683, rotating sleeve; 684, second gear; 669, cleaning brush. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely 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 the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application. Embodiment one

[0033] Reference Figures 1-6The utility model discloses a vertical circular seam welding device of boiler, including bottom plate 2 and vertical circular seam welding machine 1, vertical circular seam welding machine 1 is installed on the upper surface of bottom plate 2, and the one side fixed mounting of upper surface of bottom plate 2 is provided with mounting bracket 4, and the one side of vertical circular seam welding machine 1 is provided with moving mechanism 3, and moving mechanism 3 is installed on the top of bottom plate 2, and the inboard of mounting bracket 4 is provided with cleaning mechanism 6;

[0034] Cleaning mechanism 6 includes lifting frame 61 and fixed column 67, the top of fixed column 67 is fixedly connected with lifting frame 61, and the bottom of lifting frame 61 is provided with movable assembly 66, and the inboard of lifting frame 61 is provided with transmission assembly 68;

[0035] Movable assembly 66 includes rotating disc 663 and swing lever 662, the middle part of swing lever 662 is provided with limiting groove 667, the limiting groove 667 is slidably provided with push rod 664, one end of push rod 664 is fixedly connected with rotating disc 663, one end of swing lever 662 is fixedly connected with rotating shaft 661, the other end of swing lever 662 is rotatably connected with rotating lever 665, and the top surface of rotating lever 665 is fixedly installed with first gear 666;

[0036] Transmission assembly 68 includes connecting shell 682 and rotating sleeve 683, rotating sleeve 683 is rotatably installed on the surface of fixed column 67, and the bottom of rotating sleeve 683 is fixedly connected with connecting shell 682, and the bottom of connecting shell 682 is fixedly connected with second gear ring 681, the inboard of second gear ring 681 is meshingly provided with second gear 684, and one end of the shaft of second gear 684 is fixedly connected with the shaft part of rotating disc 663.

[0037] When the second gear ring 681 rotates in the embodiment, the inboard multiple second gears 684 meshed with the second gear ring 681 are driven to rotate, because one end of the shaft of second gear 684 is rotatably connected with fixed plate 671 and the other end of the shaft of second gear 684 is fixedly connected with rotating disc 663, when the second gear 684 rotates, rotating disc 663 is driven to rotate, when rotating disc 663 rotates, the surface push rod 664 is driven to move, so that push rod 664 starts to make circular motion on the surface of rotating disc 663, and then the limiting groove 667 in the middle part of swing lever 662 is used to drive swing lever 662 to start to move, at this moment, swing lever 662 swings back and forth with rotating shaft 661 at the center as the circle center,

[0038] Then, swing lever 662 drives rotating lever 665 at one end and cleaning brush 669 to start to clean the welding part of the boiler in the swinging process, and some water is cleaned, so that evaporation and bubble formation are avoided in the welding process, so that holes are formed in the welding seam, and the strength of the welded joint is reduced;

[0039] When the rotating rod 665 at one end of the swing rod 662 and the cleaning brush 669 make an arc movement, the first gear 666 on the surface of the rotating rod 665 also moves at the same time, at this time, the first gear 666 starts to rotate in the swing process because of the existence of the first tooth ring 668, so that the rotating rod 665 and the cleaning brush 669 also rotate at the same time, so that the cleaning effect of the cleaning brush 669 on the weld of the boiler is improved, thereby improving the safety during the welding process. Embodiment two

[0040] Figures 3-5 As shown, the bottom of the fixed column 67 is fixedly connected with a fixed plate 671, one end of the rotating shaft 661 is rotatably connected with the fixed plate 671, one end of the second gear 684 shaft rod is rotatably connected with the fixed plate 671, and the bottom of the lifting frame 61 is fixedly connected with the first tooth ring 668. The inner side of the first tooth ring 668 is engaged with the first gear 666.

[0041] The top surface of the fixed column 67 movably sleeves a driven pulley 64, the top of the lifting frame 61 is fixedly installed with a second driving motor 62, the output end of the second driving motor 62 is fixedly connected with a driving pulley 63, the surfaces of the driving pulley 63 and the driven pulley 64 sleeve a synchronous belt 65, and the bottom of the driven pulley 64 is fixedly connected with the rotating sleeve 683.

[0042] The inner diameter of the connecting shell 682 is greater than the diameter of the fixed column 67 and the diameter of the fixed plate 671, and the surface of the rotating rod 665 sleeves the cleaning brush 669.

[0043] The top of the mounting frame 4 is installed with a second electric push rod 5, and the output end of the second electric push rod 5 is fixedly connected with the top of the lifting frame 61.

[0044] In this embodiment, when the second driving motor 62 starts to move, the driving pulley 63 at one end starts to rotate, at this time, the driving pulley 63 will use the surface of the synchronous belt 65 to make the driven pulley 64 also rotate at the same time, and then the driven pulley 64 will drive the rotating sleeve 683 to rotate, at this time, the rotating sleeve 683 will drive the connecting shell 682 to start rotating on the surface of the fixed column 67, in the rotating process, the second tooth ring 681 at the bottom of the connecting shell 682 will start to rotate, thereby driving the second gear 684 to rotate, so that the movable assembly 66 starts to move;

[0045] Finally, the rotating rod 665 and the cleaning brush 669 on the movable assembly 66 start to clean the weld of the boiler under the driving of the transmission assembly 68, the second driving motor 62, etc., and when the second driving motor 62 drives, it will drive the rotating rods 665 on multiple movable assemblies 66 to start to rotate, thereby controlling multiple cleaning brushes 669 to clean the boiler together, which can improve the efficiency and effect of cleaning. Embodiment three

[0046] According to Figures 7-8 As shown in the drawings, the moving mechanism 3 comprises a moving track 31 and a moving plate 35, the bottom of the moving track 31 is fixedly connected with the bottom plate 2, and the surface of the moving track 31 is sleeved with a sliding block 33, the top of the sliding block 33 is fixedly connected with the bottom of the moving plate 35, and the upper surface of the bottom plate 2 is provided with a first electric push rod 32, and the output end of the first electric push rod 32 is fixedly connected with a moving block 34.

[0047] The top of the moving block 34 is fixedly connected with the bottom of the moving plate 35, and the surface of the moving plate 35 is provided with a rotating assembly 37, and the upper portion of the rotating assembly 37 is provided with a storage rack 36.

[0048] The rotating assembly 37 comprises a rotating column 374 and a first driving motor 373, the first driving motor 373 is fixed on the surface of the moving plate 35 through a support, the top of the rotating column 374 is fixedly connected with the bottom of the storage rack 36, and the bottom of the rotating column 374 is rotatably connected with the moving plate 35.

[0049] The surface of the rotating column 374 is fixedly provided with a worm wheel 376, the output end of the first driving motor 373 is fixedly connected with a worm gear 375, and the worm gear 375 and the worm wheel 376 are engaged.

[0050] The bottom outer edge of the storage rack 36 is fixedly connected with a fixing ring 372, the top of the moving plate 35 is fixedly provided with a limiting frame 371 on both sides, and the fixing ring 372 is slidably connected with the limiting frame 371.

[0051] In this embodiment, the boiler to be welded is placed inside the storage rack 36, and during the placing process, some threaded rods can be used to extrude and fix the bottom end, and the column weld joint is avoided from being blocked;

[0052] Then, the first electric push rod 32 can drive the moving block 34 to move, so that the moving block 34 drives the moving plate 35 to move, the position of the boiler can be controlled, and the cleaning work or the welding work is facilitated, and during the moving process, the sliding block 33 can slide on the moving track 31, so that the stability of the object moving is improved;

[0053] During the cleaning or welding process, the first driving motor 373 drives the worm gear 375 to rotate, and then drives the rotating column to rotate through the transmission of the worm wheel 376, so that the boiler is driven to rotate during the cleaning and welding process, which not only indirectly improves the cleaning effect, but also facilitates the welding operation;

[0054] In addition, during the rotating process, the fixing ring 372 can slide inside the limiting frame 371, so that the storage rack 36 will not tilt and collapse during the rotating process, and the normal movement of the cleaning work and the welding work is ensured.

[0055] The method for using the device and the working principle: the boiler to be welded is placed inside the storage rack 36, and in the placement process, the bottom end can be extruded and fixed by using some threaded rods, and the column weld is avoided to be shielded; the first electric push rod 32 can drive the moving block 34 to move, and then the moving block 34 drives the moving plate 35 to move, so that the position of the boiler can be controlled, and cleaning work or welding work is facilitated, and in the moving process, the sliding block 33 can slide on the moving track 31, thereby improving the stability of the object movement.

[0056] Then, when cleaning work is performed, the second electric push rod 5 pushes the lifting frame 61, and then the cleaning mechanism 6 is controlled to move downward to start cleaning the boiler, at this time, when the second driving motor 62 starts to move, the driving pulley 63 at one end starts to rotate, at this time, the driving pulley 63 uses the synchronous belt 65 on the surface to make the driven pulley 64 also rotate at the same time, and then the driven pulley 64 drives the rotating sleeve 683 to rotate together, at this time, the rotating sleeve 683 drives the connecting shell 682 to rotate on the surface of the fixed column 67, in the rotating process, the second gear ring 681 at the bottom of the connecting shell 682 starts to rotate, and then drives the second gear 684 to rotate. Because the shaft of the second gear 684 is rotatably connected with the fixed plate 671 at one end, and the other end of the shaft of the second gear 684 is fixedly connected with the rotating disc 663, when the second gear 684 rotates, the rotating disc 663 rotates together, and when the rotating disc 663 rotates, the pushing rod 664 on the surface moves together, so that the pushing rod 664 starts to move in a circular motion on the surface of the rotating disc 663, and then the limiting groove 667 in the middle of the swing rod 662 pushes the swing rod 662 to start to move, at this time, the swing rod 662 swings back and forth with the rotating shaft 661 at one end as the center.

[0057] Then, the swing rod 662 swings back and forth, and the rotating rod 665 at one end and the cleaning brush 669 start to clean the welding part of the boiler, and clean some water;

[0058] When the rotating rod 665 at one end of the swing rod 662 and the cleaning brush 669 move in an arc, the first gear 666 on the surface of the rotating rod 665 also moves at the same time, at this time, the first gear 666 starts to rotate in the swing process because of the existence of the first gear ring 668, and then the rotating rod 665 and the cleaning brush 669 also rotate at the same time, so that the cleaning brush 669 rotates when cleaning.

[0059] Although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can be modified, or some of the technical features can be replaced by equivalent features, by those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vertical ring joint welding device for a boiler, comprising a base plate (2) and a vertical ring joint welding machine (1), wherein the vertical ring joint welding machine (1) is installed on the upper surface of the base plate (2), a mounting rack (4) is fixedly installed on one side of the upper surface of the base plate (2), and a moving mechanism (3) is arranged on one side of the vertical ring joint welding machine (1), wherein the moving mechanism (3) is installed on the top of the base plate (2), characterized in that: The inside of the mounting frame (4) is provided with a cleaning mechanism (6); the cleaning mechanism (6) comprises a lifting frame (61) and a fixed column (67), the top end of the fixed column (67) is fixedly connected with the lifting frame (61), the bottom of the lifting frame (61) is provided with a movable assembly (66), and the inside of the lifting frame (61) is provided with a transmission assembly (68); the movable assembly (66) comprises a rotating disc (663) and a swing rod (662), a limiting groove (667) is formed in the middle of the swing rod (662), a push rod (664) is slidably arranged in the limiting groove (667), one end of the push rod (664) is fixedly connected with the rotating disc (663), one end of the swing rod (662) is fixedly connected with a rotating shaft (661), the other end of the swing rod (662) is rotatably connected with a rotating rod (665), and the top surface of the rotating rod (665) is fixedly installed with a first gear (666); the transmission assembly (68) comprises a connecting shell (682) and a rotating sleeve (683), the rotating sleeve (683) is rotatably installed on the surface of the fixed column (67), the bottom of the rotating sleeve (683) is fixedly connected with the connecting shell (682), the bottom of the connecting shell (682) is fixedly connected with a second gear ring (681), and the inside of the second gear ring (681) is meshingly provided with a second gear (684); one end of the shaft rod of the second gear (684) is fixedly connected with the shaft portion of the rotating disc (663); ​ The bottom of the fixed column (67) is fixedly connected with a fixed plate (671), one end of the rotating shaft (661) is rotatably connected with the fixed plate (671), one end of the shaft rod of the second gear (684) is rotatably connected with the fixed plate (671), and the bottom of the lifting frame (61) is fixedly connected with a first gear ring (668); the inside of the first gear ring (668) is meshed with the first gear (666); The top surface of the fixed column (67) is movably sleeved with a driven pulley (64), the top of the lifting frame (61) is fixedly installed with a second driving motor (62), the output end of the second driving motor (62) is fixedly connected with a driving pulley (63), the surfaces of the driving pulley (63) and the driven pulley (64) are sleeved with a synchronous belt (65), and the bottom of the driven pulley (64) is fixedly connected with the rotating sleeve (683); The inner diameter of the connecting shell (682) is greater than the diameter of the fixed column (67) and the diameter of the fixed plate (671), and the surface of the rotating rod (665) is sleeved with a cleaning brush (669).

2. The apparatus for welding a vertical girth joint of a boiler as claimed in claim 1, wherein: The top of the mounting frame (4) is provided with a second electric push rod (5), and the output end of the second electric push rod (5) is fixedly connected with the top of the lifting frame (61).

3. The apparatus for welding a vertical girth joint of a boiler as claimed in claim 1, wherein: The moving mechanism (3) includes a moving track (31) and a moving plate (35), the bottom of the moving track (31) is fixedly connected with the bottom plate (2), the surface of the moving track (31) is slidably sleeved with a sliding block (33), the top of the sliding block (33) is fixedly connected with the bottom of the moving plate (35), the upper surface of the bottom plate (2) is installed with a first electric push rod (32), and the output end of the first electric push rod (32) is fixedly connected with a moving block (34).

4. The apparatus of claim 3 wherein: The top of the moving block (34) is fixedly connected with the bottom of the moving plate (35), the surface of the moving plate (35) is installed with a rotating assembly (37), and the upper portion of the rotating assembly (37) is provided with a storage rack (36).

5. The apparatus of claim 4 wherein: The rotating assembly (37) includes a rotating column (374) and a first driving motor (373), the first driving motor (373) is fixed on the surface of the moving plate (35) through a support, the top of the rotating column (374) is fixedly connected with the bottom of the storage rack (36), and the bottom of the rotating column (374) is rotatably connected with the moving plate (35).

6. The apparatus of claim 5 wherein: The surface of the rotating column (374) is fixedly installed with a worm wheel (376), the output end of the first driving motor (373) is fixedly connected with a worm (375), and the worm (375) and the worm wheel (376) are engaged.

7. The apparatus for welding a vertical girth seam of a boiler as defined in claim 5 wherein: The bottom outer edge of the storage rack (36) is fixedly connected with a fixed ring (372), the top of the moving plate (35) is fixedly installed with a limiting frame (371) on both sides, and the fixed ring (372) is slidably connected with the limiting frame (371).

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