A welding seam processing device for narrow spaces

Abstract

The present application discloses a weld treatment device for narrow spaces, which relates to the technical field of weld treatment. It includes a frame assembly, a grinding assembly, a dust suction assembly, a fixing assembly and a sliding assembly. The frame assembly includes an arc-shaped square frame, and a mounting plate is fixed on the inner side of the arc-shaped square frame. The grinding assembly includes a pneumatic grinding machine fixed on the side end of the mounting plate, and a grinding wheel is installed on the pneumatic grinding machine. The dust suction assembly includes a dust suction pipe arranged on the side of the vertical rod, the lower end of the dust suction pipe is connected with a first flexible pipe, and the lower end of the first flexible pipe is connected with a suction nozzle. In the present application, the pneumatic grinding machine is installed on the frame assembly, and then the frame assembly is placed at the gap of the double-layer cylinder workpiece. The pneumatic grinding machine drives the grinding wheel to rotate, and the grinding wheel is always at the same height, and the grinding effects at each place are neat and consistent, ensuring the weld quality. It can also clean the inside of the gap of the double-layer cylinder workpiece, and the air cavity can provide a gas protection function for weld welding.

Description

Technical Field

[0001] This application relates to the technical field of weld treatment, and particularly to a weld treatment device for narrow spaces. Background Art

[0002] At present, in the machinery manufacturing industry, there are many products with a double-layer cylinder structure. In actual manufacturing, for the last welded cylinder, a single-sided weld form is often adopted, and welding is carried out from the outside of the container. The root of the weld is located in the double-layer hollow cavity position. In this case, it is very difficult to clean the surface of the weld in the double-layer hollow cavity position, especially for welds with a deeper depth, the treatment is more troublesome.

[0003] Currently, for welds in narrow spaces, tools such as grinders and dust suction pipes are usually extended into the cavity through a lengthened rod for work. For parts with a relatively small middle gap and a relatively deep weld depth, this method is difficult to achieve the purpose of cleaning, and problems such as deviation during cleaning due to insufficient stiffness, inability to process a fixed position for a long time, and difficulty in accurately processing the weld position due to too deep a depth are likely to occur. Moreover, the surface of the weld after cleaning is often not satisfactory, which in turn affects the weld quality and the overall function of the product. Summary of the Invention

[0004] In order to improve the treatment effect of welds in narrow spaces, this application provides a weld treatment device for narrow spaces.

[0005] A weld treatment device for narrow spaces provided by this application adopts the following technical solution:

[0006] A weld treatment device for narrow spaces includes a frame assembly, a grinding assembly, a dust suction assembly, a fixing assembly, and a sliding assembly. The frame assembly includes an arc-shaped square frame. On the inner side of the arc-shaped square frame, a mounting plate is fixed, and a vertical rod is provided at the upper end of the arc-shaped square frame. The fixing assembly is arranged at the upper end of the vertical rod. The grinding assembly includes a pneumatic grinder, which is fixed to the side end of the mounting plate. A grinding wheel is installed on the rotating shaft of the pneumatic grinder. The dust suction assembly includes a dust suction pipe arranged on the side of the vertical rod and extending downward along the edge of the arc-shaped square frame, and the dust suction pipe is fixed to the vertical rod and the arc-shaped square frame through pipe clamps. The lower end of the dust suction pipe is connected to a first flexible pipe, and the lower end of the first flexible pipe is connected to a suction nozzle. A rotary cylinder is installed on the edge of the arc-shaped square frame for driving the suction nozzle to swing. The sliding assembly is arranged below the arc-shaped square frame, and the sliding assembly includes rollers for driving the device to move.

[0007] By adopting the above technical solution, the arc-shaped square frame can be placed at the gap of the double-layer cylindrical workpiece, with the bottom supported by rollers, and the upper end of the vertical rod being higher than the cylindrical workpiece, which is convenient for air circuit connection. After the dust suction pipe is connected to the industrial vacuum cleaner, when grinding, the grinding wheel is at the same height as the weld. The rollers can facilitate the movement of the arc-shaped square frame in the gap and can grind along the weld while moving. The grinding structure is stable and can continuously grind, improving the weld treatment effect. Moreover, the dust and welding slag after grinding will be sucked by the suction nozzle after falling, which can clean the gap of the double-layer cylinder. In addition, the suction nozzle can be adjusted by the rotary cylinder to change the direction and suck dust and debris at different angles, with a better cleaning effect.

[0008] Preferably, a vertical plate is fixed at the middle position of the arc-shaped square frame, and a guide plate is fixed on the side of the vertical plate close to the pneumatic grinding machine. The guide plate is located directly below the pneumatic grinding machine. A branch pipe is connected to the side end of the dust suction pipe, and the branch pipe is connected to the arc-shaped square frame, and the connection part is aligned with the lower end of the guide plate.

[0009] By adopting the above technical solution, the welding slag and dust after grinding will fall downward onto the guide plate and then slide down along the guide plate to the port of the branch pipe, which is convenient for the industrial vacuum cleaner to extract the welding slag and dust, further improving the cleaning effect.

[0010] Preferably, the sliding assembly includes two support rods. Two through holes are opened at the lower end of the arc-shaped square frame, and the support rods are inserted into the through holes. Two nuts are threadedly connected to the support rods, and the two nuts are respectively abutted against the inner and outer sides of the arc-shaped square frame to fix the support rods. The rollers are installed at the lower ends of the support rods.

[0011] By adopting the above technical solution, the support rods are fixed on the arc-shaped square frame by two nuts. Adjusting the two nuts can change the height of the support rods, thereby adjusting the height of the grinding wheel and expanding the application range of the device.

[0012] Preferably, two layer plates are fixed on the side of the vertical plate away from the pneumatic grinding machine. The space between the two layer plates is at the same height as the grinding wheel, and an argon inlet pipe is connected to the upper layer plate to input argon into the air cavity between the two layer plates for welding protection.

[0013] By adopting the above technical solution, the two layer plates are exactly located on the upper and lower sides of the weld. Cooperating with the vertical plate and the edge of the arc-shaped square frame can provide a gas supply space at the welding position. Then, injecting argon between the two layer plates through the argon inlet pipe can provide argon protection on the back of the weld during argon arc welding.

[0014] Preferably, an air box is fixed to the lower surface of the lower shelf. A compressed air inlet pipe is connected to the air box. Two flat nozzles are arranged on both sides of the air box. A square hole is formed in the mounting plate, and the square hole is aligned with one of the flat nozzles.

[0015] By adopting the above technical solution, during use, compressed air is injected into the air box through the compressed air inlet pipe and then ejected to both sides through the two flat nozzles, so that the dust attached to the side walls of the workpiece on both sides can be blown off, facilitating the dust collection assembly to collect dust and improving the cleaning effect.

[0016] Preferably, telescopic cylinders for improving the stability of the frame assembly are installed on both the left and right sides of the arc-shaped square frame, and two rotating wheels are rotatably arranged at the ends of the arc-shaped square frame.

[0017] By adopting the above technical solution, the width of the arc-shaped square frame is smaller than the width of the gap between the double-layer cylinders, which is convenient for putting in and taking out. When grinding the weld seam, the two telescopic cylinders on both sides can be extended so that one end of the telescopic cylinder abuts against the inner side wall of the gap, while the rotating wheel abuts against the outer side wall of the gap, improving the stability of the arc-shaped square frame in the gap and then improving the grinding effect.

[0018] Preferably, the fixing assembly includes a flat sleeve fixed to the upper side end of the vertical rod, and a clamping plate is fixed below the flat sleeve. A right-angle plate is slidably arranged in the flat sleeve, and two fastening bolts are threadedly connected above the flat sleeve for fixing the right-angle plate.

[0019] By adopting the above technical solution, the right-angle plate can be fixed by the two fastening bolts. During use, after the right-angle plate is fixed, it can just be stuck to both sides of the upper edge of the double-layer cylinder workpiece together with the clamping plate, further improving the stability of the frame assembly.

[0020] Preferably, the vertical rod is of a hollow tubular structure with both ends sealed. A plurality of control valves are arranged at the upper end of the vertical rod, and a plurality of air path pipes and argon gas delivery pipes are arranged inside the vertical rod. The upper ends of the air path pipes and the argon gas delivery pipes are respectively connected to the corresponding control valves. The lower ends of the air path pipes are respectively connected to the pneumatic grinding machine, the rotary cylinder, the telescopic cylinder and the air box. The lower end of the argon gas delivery pipe is connected to the argon gas inlet pipe, facilitating the input of argon gas from the outside.

[0021] By adopting the above technical solution, the air path pipes for supplying gas to the pneumatic grinding machine, the rotary cylinder, the air box and the telescopic cylinder are all distributed inside the vertical rod, and the argon gas delivery pipe is also distributed inside the vertical rod. The protection effect on the air path pipes is better, and the structure is more compact, suitable for use in narrow spaces.

[0022] Preferably, a spring is sleeved on the support rod, and the spring is located below the arc-shaped square frame. The lower end of the spring abuts against one of the nuts. Two support rods are hinged to the upper end of the support rod, and a second flexible pipe is arranged between the flat air nozzle and the air box. The lower end of the flat air nozzle is hinged to the support rod at the corresponding position.

[0023] By adopting the above technical solution, when the device is placed at the gap, the flat air nozzles blowing air to both sides are pulled by the support rod and move closer downward, which can reduce the width of the device and facilitate its placement into the gap. When the bottom of the roller comes into contact, the weight of the device will compress the spring. At this time, the support rod will push the two support rods upward, and then expand the two flat air nozzles to both sides, enabling them to fully blow to both sides of the gap.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. Install the pneumatic grinding machine on the frame assembly, and then place the frame assembly at the gap of the double-layer cylindrical workpiece. The bottom is supported by the sliding assembly. When grinding, the pneumatic grinding machine drives the grinding wheel to rotate. The sliding assembly facilitates the movement of the device at the gap, and during the movement, the grinding wheel is always at the same height, enabling comprehensive grinding of the weld seam, and the grinding effects at various places are neat and consistent, ensuring the weld quality.

[0026] 2. With the assistance of the dust collection assembly, while grinding, the inside of the gap of the double-layer cylindrical workpiece is cleaned. The dust and welding slag generated during grinding can be extracted from the dust collection pipe through an industrial vacuum cleaner. In addition, the suction nozzle can be adjusted by the rotary cylinder to change the direction and suck dust and debris at different angles, with a better cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Isometric schematic diagram mainly showing the overall structure of Embodiment 1 of the present application;

[0028] Figure 2 Schematic diagram mainly showing the front structure of the arc-shaped square frame of Embodiment 1 of the present application;

[0029] Figure 3 Schematic diagram mainly showing the back structure of the arc-shaped square frame of Embodiment 1 of the present application;

[0030] Figure 4 Schematic diagram mainly showing the upper end structure of the vertical rod of Embodiment 1 of the present application;

[0031] Figure 5 Schematic diagram mainly showing the connection structure between the flat air nozzle and the support rod of Embodiment 2 of the present application;

[0032] Figure 6 Schematic diagram mainly showing the usage state of the present application;

[0033] Reference numerals: 1, frame assembly; 11, arc square frame; 12, mounting plate; 13, vertical rod; 14, vertical plate; 15, guide plate; 16, shelf board; 17, square hole;

[0034] 2, grinding assembly; 21, pneumatic grinding machine; 22, grinding wheel;

[0035] 3, dust suction assembly; 31, dust suction pipe; 32, pipe clamp; 33, first flexible pipe; 34, suction nozzle; 35, rotary cylinder; 36, branch pipe;

[0036] 4, sliding assembly; 41, support rod; 42, nut; 43, roller; 44, spring;

[0037] 5, runner; 6, argon gas inlet pipe;

[0038] 7, air box; 71, compressed air inlet pipe; 72, flat jet nozzle; 73, second flexible pipe; 74, support rod;

[0039] 8, telescopic cylinder;

[0040] 9, fixing assembly; 91, flat sleeve; 92, clamping plate; 93, right-angle plate; 94, fastening bolt;

[0041] 10, control valve. Detailed implementation manners

[0042] The following further elaborates on this application Figures 1-6 in conjunction with the attached drawings.

[0043] The embodiment of this application discloses a weld processing device for narrow spaces.

[0044] Embodiment 1

[0045] Referring to Figure 1 , a weld processing device for narrow spaces includes a frame assembly 1, a grinding assembly 2, a dust suction assembly 3, a fixing assembly 9, and a sliding assembly 4. Each safety area is demarcated on the frame assembly 1. The sliding assembly 4 is arranged at the lower end of the frame assembly 1 to play a supporting role and can facilitate the movement of the frame assembly 1. The dust suction assembly 3 is arranged on one side of the frame assembly 1 to clean the gap of a workpiece with a double-layer cylindrical structure. The grinding assembly 2 is arranged inside the frame assembly 1 and can grind the weld when the frame assembly 1 moves, and the grinding height is moderate and consistent, improving the grinding effect.

[0046] Referring to Figure 2 and Figure 3, the frame assembly 1 includes an arc-shaped square frame 11. On the inner side of the arc-shaped square frame 11, a mounting plate 12 is fixed. And at the upper end of the arc-shaped square frame 11, a vertical rod 13 is provided. The fixing component 9 is arranged at the upper end of the vertical rod 13. At the middle position of the arc-shaped square frame 11, a vertical plate 14 is fixed. And on one side of the vertical plate 14, a guide plate 15 is fixed, and on the other side, two layer plates 16 are fixed. Moreover, a square hole 17 is formed in the mounting plate 12, and the square hole 17 is located below the layer plate 16. The vertical rod 13 is a tubular structure with sealed ends, and inside it, there are several gas path pipes and argon delivery pipes. And control valves 10 are installed at the upper ends of the gas path pipes and the argon delivery pipes, which can control the on-off of each gas path.

[0047] The grinding component 2 includes a pneumatic grinding machine 21. The air supply port of the pneumatic grinding machine 21 is connected to the bottom of the corresponding gas path pipe. The pneumatic grinding machine 21 is fixed to the side end of the mounting plate 12. A grinding wheel 22 is installed on the rotating shaft of the pneumatic grinding machine 21, and the grinding wheel 22 is located directly above the guide plate 15. The pneumatic grinding machine 21 drives the grinding wheel 22 to rotate to grind the weld. And as the device moves, the grinding height remains unchanged, and the grinding effect is better.

[0048] The dust suction component 3 includes a dust suction pipe 31 arranged on the side of the vertical rod 13, and the dust suction pipe 31 bends downward along the edge of the arc-shaped square frame 11 and extends. The dust suction pipe 31 is fixed to the vertical rod 13 and the arc-shaped square frame 11 through pipe clamps 32. The lower end of the dust suction pipe 31 is connected to a suction nozzle 34 through a first flexible pipe 33. Moreover, a rotary cylinder 35 is installed on the edge of the arc-shaped square frame 11 to drive the suction nozzle 34 to swing. A branch pipe 36 is connected to the side end of the dust suction pipe 31, and the branch pipe 36 is connected to the arc-shaped square frame 11, and the connection part is aligned with the lower end of the guide plate 15, so that dust and other sundries sliding down along the guide plate 15 can be extracted.

[0049] During use, connect the upper end of the dust suction pipe 31 to an industrial vacuum cleaner. After the ground dust and welding slag fall onto the guide plate 15, they slide down along the guide plate 15 and can be extracted through the branch pipe 36. In addition, the dust and the like falling to the bottom of the workpiece gap will be sucked by the suction nozzle 34, and the gap of the double-layer cylinder can be cleaned. Moreover, the suction nozzle 34 can be adjusted by the rotary cylinder 35 to change the direction and suck dust and debris at different angles, and the cleaning effect is better.

[0050] The sliding component 4 includes two support rods 41. Two through holes are formed at the lower end of the arc-shaped square frame 11, and the support rods 41 are inserted into the two through holes formed at the lower end of the arc-shaped square frame 11. Two nuts 42 are threadedly connected to the support rods 41, and the two nuts 42 clamp the arc-shaped square frame 11 to fix the support rods 41. The lower end of the support rod 41 is installed with rollers 43 to ensure the smooth movement of the device.

[0051] The support rod 41 is fixed on the arc-shaped square frame 11 by two nuts 42. By adjusting the two nuts 42, the height of the support rod 41 can be changed, thereby adjusting the height of the grinding wheel 22 to grind welds of different heights, expanding the application range of the device. Moreover, the adjustment is simple and the use is convenient.

[0052] An argon inlet pipe 6 is connected to the upper layer plate 16. The lower end of the argon inlet pipe 6 communicates with the air cavity between the two layer plates 16, and the upper end of the argon inlet pipe 6 is connected to the bottom of the argon delivery pipeline. During use, argon can be introduced through an argon output device to provide protection during welding.

[0053] An air box 7 is fixed to the lower surface of the lower layer plate 16. A compressed air inlet pipe 71 is connected to the air box 7, and the compressed air inlet pipe 71 is connected to the lower end of the corresponding gas pipeline. Compressed air is injected into the air box 7. Two flat nozzles 72 are provided on both sides of the air box 7, which can spray compressed air to both sides to blow the dust attached to the side walls of the workpiece on both sides, blowing the dust off to facilitate the dust collection assembly 3 to collect dust and improve the cleaning effect.

[0054] Expansion cylinders 8 are installed on both the left and right sides of the arc-shaped square frame 11, and two rotating wheels 5 are rotatably arranged at the ends of the arc-shaped square frame 11. The width of the arc-shaped square frame 11 is smaller than the width of the gap between the double-layer cylinders, which is convenient for putting in and taking out. When grinding the weld, the two expansion cylinders 8 on both sides can be extended, so that one end of the expansion cylinder 8 abuts against the inner side wall of the gap, and the rotating wheel 5 abuts against the outer side wall of the gap, improving the stability of the arc-shaped square frame 11 in the gap and then improving the grinding effect.

[0055] Reference Figure 4 The fixing assembly 9 includes a flat sleeve 91 fixed to the upper side end of the vertical rod 13. A right-angle plate 93 is slidably arranged in the flat sleeve 91, and a clamping plate 92 is fixed below the flat sleeve 91. Two fastening bolts 94 for fixing the right-angle plate 93 are threadedly connected above the flat sleeve 91.

[0056] The right-angle plate 93 can be fixed by two fastening bolts 94. During use, after the right-angle plate 93 is fixed, it can just be clamped on both sides of the upper edge of the double-layer cylinder workpiece with the clamping plate 92 respectively, further improving the stability of the frame assembly 1.

[0057] The implementation principle of the narrow - space weld treatment device in the embodiment of the present application is as follows: The arc - shaped square frame 11 can be placed at the gap of the double - layer cylindrical workpiece, supported by the rollers 43 at the bottom. By adjusting the two nuts 42, the height of the support rod 41 can be changed, thereby adjusting the height of the grinding wheel 22 to grind welds at different heights. The upper end of the vertical rod 13 is higher than the cylindrical workpiece, exposing the control valve 10 outside the gap for convenient air - path connection. After the dust suction pipe 31 is connected to the industrial vacuum cleaner, when grinding, the two telescopic cylinders 8 on both sides can be extended, so that one end of the telescopic cylinder 8 abuts against the inner side wall of the gap, and the runner 5 abuts against the outer side wall of the gap, improving the stability of the arc - shaped square frame 11 in the gap. After fixing the right - angled plate 93, it can just be stuck with the clamping plate 92 on both sides of the upper edge of the double - layer cylindrical workpiece respectively, further improving the stability of the frame assembly 1. The grinding wheel 22 is at the same height as the weld. The rollers 43 facilitate the movement of the arc - shaped square frame 11 in the gap, and can grind along the weld while moving. The grinding structure is stable and can continuously grind, improving the weld treatment effect. After the dust and welding slag after grinding fall onto the guide plate 15, they slide down along the guide plate 15 and can be extracted through the branch pipe 36. In addition, the dust and the like that fall to the bottom of the workpiece gap will be sucked by the suction nozzle 34, which can clean the gap of the double - layer cylinder. Moreover, the suction nozzle 34 can be adjusted by the rotary cylinder 35 to change the direction and suck dust and debris at different angles, with a better cleaning effect. In addition, two flat jet nozzles 72 are arranged on both sides of the air box 7, which can spray compressed air to both sides to blow the dust attached to the side walls of the workpiece, blowing the dust down to facilitate the dust - suction assembly 3 to suck dust and improve the cleaning effect. The upper end of the argon inlet pipe 6 is connected to the bottom of the argon delivery pipeline. During use, argon can be flushed in through the argon output device to provide protection during welding.

[0058] Embodiment 2

[0059] Refer to Figure 5 , the difference between this embodiment and Embodiment 1 is that the lower nut 42 does not contact the arc - shaped square frame 11. A spring 44 is sleeved on the support rod 41, and the spring 44 is located below the arc - shaped square frame 11. The lower end of the spring 44 abuts against one of the nuts 42. The upper end of the support rod 41 is hinged with two support rods 74. A second flexible pipe 73 is arranged between the flat jet nozzle 72 and the air box 7, and the lower end of the flat jet nozzle 72 is hinged with the corresponding support rod 74.

[0060] The implementation principle of the second embodiment is as follows: When the device is placed at the gap, the flat jet nozzles 72 that blow air to both sides are pulled by the support rods 41 and move closer downward, which can reduce the width of the device and facilitate its placement inside the gap. When the bottom of the roller 43 comes into contact, the weight of the device will compress the spring 44. At this time, the support rod 41 will push the two support rods 74 upward, and then expand the two flat jet nozzles 72 to both sides, enabling them to fully blow to both sides of the gap, making it easier to place the device and not affecting the cleaning effect.

[0061] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A welding seam processing device for narrow spaces, characterized in that: It includes a frame assembly (1), a grinding assembly (2), a dust suction assembly (3), a fixing assembly (9) and a sliding assembly (4). The frame assembly (1) includes an arc-shaped square frame (11). On the inner side of the arc-shaped square frame (11), a mounting plate (12) is fixed. And at the upper end of the arc-shaped square frame (11), a vertical rod (13) is provided. The fixing assembly (9) is arranged at the upper end of the vertical rod (13). The grinding assembly (2) includes a pneumatic grinding machine (21). The pneumatic grinding machine (21) is fixed to the side end of the mounting plate (12). A grinding wheel (22) is installed on the rotating shaft of the pneumatic grinding machine (21). The dust suction assembly (3) includes a dust suction pipe (31) arranged on the side of the vertical rod (13) and extending downward along the edge of the arc-shaped square frame (11). And the dust suction pipe (31) is fixed to the vertical rod (13) and the arc-shaped square frame (11) through pipe clamps (32). The lower end of the dust suction pipe (31) is connected to a first flexible pipe (33). The lower end of the first flexible pipe (33) is connected to a suction nozzle (34). A rotary cylinder (35) is installed on the edge of the arc-shaped square frame (11) for driving the suction nozzle (34) to swing. The sliding assembly (4) is arranged below the arc-shaped square frame (11). And the sliding assembly (4) includes rollers (43) for driving the device to move. The sliding assembly (4) includes two support rods (41). Two through holes are opened at the lower end of the arc-shaped square frame (11). The support rods (41) are inserted into the through holes. Two nuts (42) are threadedly connected to the support rods (41). The two nuts (42) are respectively abutted against the inner side and the outer side of the arc-shaped square frame (11) for fixing the support rods (41). The rollers (43) are installed at the lower ends of the support rods (41). A vertical plate (14) is fixed at the middle position of the arc-shaped square frame (11). On the side of the vertical plate (14) away from the pneumatic grinding machine (21), two laminates (16) are fixed. An air box (7) is fixed to the lower surface of the lower laminate (16). A spring (44) is sleeved on the support rod (41). And the spring (44) is located below the arc-shaped square frame (11). The lower end of the spring (44) abuts against one of the nuts (42). The upper ends of the support rods (41) are hinged with two support rods (74). And a second flexible pipe (73) is arranged between the flat jet nozzle (72) and the air box (7). The lower end of the flat jet nozzle (72) is hinged with the corresponding support rod (74). Telescopic cylinders (8) for improving the stability of the frame assembly (1) are installed on both the left and right sides of the arc-shaped square frame (11). And two rotating wheels (5) are rotatably arranged at the ends of the arc-shaped square frame (11).

2. The narrow space weld treatment device according to claim 1, characterized in that: A guide plate (15) is fixed to the side of the vertical plate (14) close to the pneumatic grinding machine (21). The guide plate (15) is located directly below the pneumatic grinding machine (21). A branch pipe (36) is connected to the side end of the dust suction pipe (31). And the branch pipe (36) is connected to the arc-shaped square frame (11). The connection part is aligned with the lower end of the guide plate (15).

3. The narrow-space weld treatment device according to claim 2, wherein: The space between the two laminates (16) is at the same height as the grinding wheel (22), and an argon inlet pipe (6) is connected to the upper laminate (16) to input argon into the air cavity between the two laminates (16) for welding protection.

4. The narrow space weld treatment device according to claim 3, wherein: A compressed air inlet pipe (71) is connected to the air box (7), two flat nozzles (72) are arranged on both sides of the air box (7), and a square hole (17) is formed in the mounting plate (12), and the square hole (17) is aligned with one of the flat nozzles (72).

5. The narrow space weld treatment device according to claim 1, characterized in that: The fixing component (9) includes a flat sleeve (91) fixed to the upper side end of the vertical rod (13), and a clamping plate (92) is fixed below the flat sleeve (91). A right-angle plate (93) is slidably arranged in the flat sleeve (91), and two fastening bolts (94) are threadedly connected above the flat sleeve (91) for fixing the right-angle plate (93).

6. The narrow-space weld treatment device according to claim 1, wherein: The vertical rod (13) is of a hollow tubular structure, and both ends of the vertical rod (13) are sealed. A plurality of control valves (10) are arranged at the upper end of the vertical rod (13), and a plurality of gas path pipes and argon delivery pipes are arranged inside the vertical rod (13). The upper ends of the gas path pipes and the argon delivery pipes are respectively connected to the corresponding control valves (10), and the lower ends of the gas path pipes are respectively connected to the pneumatic grinding machine (21), the rotary cylinder (35), the telescopic cylinder (8) and the air box (7). The lower end of the argon delivery pipe is connected to the argon inlet pipe (6) to facilitate the input of argon from the outside.

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