Pipe positioning device and method for welding a pipe

Abstract

The application discloses a pipeline positioning device and method for welding pipelines, which comprises a base and a positioning assembly. A positioning groove is formed in the top of the base. An adjusting assembly is arranged on the base. A moving seat is arranged on the adjusting assembly. Support feet are arranged on the bottom of the base. A purification assembly is arranged on the positioning assembly. The moving seat is provided with the positioning assembly which can limit pipelines with different diameters. The positioning assembly comprises a first cylinder, a second cylinder, a third cylinder, a fourth cylinder, a limiting groove, a limiting rod, a limiting block, a spring, a fixed block, a screw rod, a knob and a fixed groove. The first cylinder is arranged on the moving seat. The second cylinder is arranged in the first cylinder. The third cylinder is arranged in the second cylinder. The fourth cylinder is arranged in the third cylinder. The limiting grooves are formed in the inner walls of the first cylinder, the second cylinder and the third cylinder. The limiting rod is arranged between the left and right sides of the inner wall of the limiting groove. The technical scheme can achieve the purposes of conveniently positioning and welding pipelines with different diameters and purifying smoke.

Description

Technical Field

[0001] This invention relates to the field of pipe processing technology, and in particular to a pipe positioning device and method for welded pipes. Background Technology

[0002] Pipelines are made of pipes, pipe fittings, and... valve A device composed of interconnected components for conveying gases, liquids, or fluids containing solid particles; typically, the fluid is transported via... blower , compressor , pump and boiler After being pressurized, the fluid flows from the high-pressure area to the low-pressure area in the pipeline. It can also be transported using its own pressure or gravity. Pipelines have a wide range of applications, primarily for water supply, drainage, heating, gas supply, and long-distance transportation. oil and natural gas Pipe positioning devices are needed when welding pipes in agricultural irrigation, hydraulic engineering and various industrial installations.

[0003] Existing pipe positioning devices for welded pipes are mostly limited to positioning pipes of a specified diameter. When positioning and connecting pipes of multiple diameters, different devices are required, which is labor-intensive and time-consuming. In addition, when welding pipes, the gases generated during welding can easily spread to the surrounding area and are difficult to remove, which can harm the health of on-site workers. Summary of the Invention

[0004] The main objective of this invention is to propose a pipe positioning device and method for welding pipes, aiming to solve the existing technical problems of being unable to position and connect pipes of various diameters and the gas generated during welding easily diffusing to the surrounding area and being inconvenient to clean.

[0005] To achieve the above objectives, the present invention proposes a pipe positioning device for welded pipes, comprising a base and a positioning assembly. The base has a positioning groove at its top, an adjustment assembly on its base, a movable seat on the adjustment assembly, and support feet at the bottom of the base. The positioning assembly has a cleaning assembly on its base. Above the movable seat is a positioning component capable of limiting the position of pipes of different diameters. The positioning assembly includes a first cylinder, a second cylinder, a third cylinder, a fourth cylinder, a limiting groove, a limiting rod, a limiting block, a spring, a fixing block, a lead screw, a knob, and a fixing groove. The first cylinder is disposed on the movable seat, the second cylinder is disposed inside the first cylinder, the third cylinder is disposed inside the second cylinder, and the fourth cylinder is disposed inside the third cylinder. The limiting grooves are respectively... The limiting rod is located between the left and right sides of the inner wall of the limiting groove, which is formed on the inner wall of the first cylinder, the second cylinder, and the third cylinder. The limiting block is sleeved on the limiting rod. The spring is located between the inner wall of the limiting groove and the limiting block, and is sleeved on the limiting rod. The fixing block is located on the opposite side of the first cylinder. The lead screw is located at the top of the fixing block, and its other end passes through and extends to the bottom of the fixing block. The knob is located at the top of the lead screw. The fixing grooves are respectively formed on the outer surface of the second cylinder, the third cylinder, and the fourth cylinder. There are multiple limiting grooves, limiting rods, limiting blocks, and springs, and the multiple limiting grooves, limiting rods, limiting blocks, and springs are distributed in parallel front and back.

[0006] Optionally, the first cylinder, the second cylinder, the third cylinder, and the fourth cylinder are sequentially nested from the outside to the inside, and the first cylinder, the second cylinder, the third cylinder, and the fourth cylinder are all located on the same axis.

[0007] Optionally, there are multiple fixing slots, which are arranged vertically in parallel and spaced apart horizontally.

[0008] Optionally, the adjustment assembly includes a servo motor, a threaded rod, and a moving block. The servo motor is located on the right side of the base. The threaded rod is coaxially connected to the output shaft of the servo motor via a coupling, and its other end passes through and is rotatably connected to the left side of the inner wall of the positioning groove. The moving block is sleeved on the threaded rod and located inside the positioning groove. The top of the moving block is fixedly connected to the moving seat.

[0009] Optionally, the threaded rod has multiple thread segments engraved on it, and they are symmetrically distributed.

[0010] Optionally, the purification assembly includes a top plate, an exhaust fan, a filter box, a filter plate, a retaining plate, an exhaust pipe, and a suction nozzle. The top plate is located at the top of the first cylinder on the left side. The exhaust fan is located at the top left end of the top plate. The filter box is located at the top right end of the top plate and is connected to the left side of the exhaust fan. The filter plate is located on the inner wall of the filter box. The retaining plate is located on the outer peripheral wall of the first cylinder. The exhaust pipe is connected to the right side of the filter box and is sleeved on the retaining plate. The suction nozzle is connected to the end of the exhaust pipe away from the filter box.

[0011] Optionally, there may be multiple card plates, which are arranged in a ring around the first cylinder as the axis.

[0012] Optionally, a portion of the extraction pipe is a corrugated pipe.

[0013] On the other hand, the present invention proposes a method for using a pipe positioning device for welded pipes, comprising the following steps:

[0014] S1. When it is necessary to position and connect the welded pipes, if the outer diameter of the pipe matches the outer diameter of the fourth cylinder, first turn the knob to adjust the screw to the opposite side of the third cylinder through the limiting block and limit it. Then push the pipe from the opposite side of the fourth cylinder to its opposite side. The limiting block squeezes the spring on the opposite side through the limiting rod and pushes the fourth cylinder out to the opposite side. Then turn the knob again to move the bottom of the screw to contact the inner bottom wall of the fixing groove to limit the fourth cylinder. At the same time, the inner wall of the third cylinder positions the pipe. When the outer diameter of the pipe matches the outer diameter of the third cylinder, adjust the screw to the opposite side of the second cylinder. Then push the opposite sides of the third and fourth cylinders through the pipe. Repeat the above operation to position the inner wall of the second cylinder with the pipe.

[0015] S2. When it is necessary to position and connect the pipes on both sides, start the servo motor. The threaded rod drives the moving seat on the moving block to move to the opposite side, so that the two positioned pipes can be connected, which facilitates the positioning and welding.

[0016] S3. When it is necessary to purify the fumes generated by welding pipes, first attach the exhaust pipe to the clamp plate at the position where the pipe needs to be welded, then start the exhaust fan so that the nozzle draws the welding fumes into the filter box through the exhaust pipe, and then filters the fumes through the filter plate to complete the fume purification treatment.

[0017] The technical solution of this invention has the following beneficial effects: When it is necessary to position and connect welded pipes, if the outer diameter of the pipe matches the outer diameter of the fourth cylinder, first turn the knob to adjust the screw to the opposite side of the third cylinder through the limiting adjustment of the fixing block, and then push the pipe from the opposite side of the fourth cylinder to its opposite side. The limiting block, through the limiting rod, squeezes the spring to the opposite side, pushing the fourth cylinder to the opposite side. Then turn the knob again to move the bottom of the screw to contact the inner bottom wall of the fixing groove, completing the limiting of the fourth cylinder. At the same time, the inner wall of the third cylinder completes the positioning of the pipe. When the outer diameter of the pipe matches the outer diameter of the third cylinder, the screw is adjusted to... On the opposite side of the second cylinder, the third and fourth cylinders are then pushed on opposite sides through the pipe, and the same operation is repeated to position the inner wall of the second cylinder with the pipe. When it is necessary to position and align the pipes on both sides, the servo motor is started, and the threaded rod drives the moving seat on the moving block to move on opposite sides, so that the two positioned pipes are aligned and the positioning welding is completed. When it is necessary to purify the fumes generated during pipe welding, the exhaust pipe is first clamped onto the clamp plate at the position where the pipe needs to be welded. Then, the exhaust fan is started, and the suction nozzle draws the welding fumes into the filter box through the exhaust pipe. The fumes are then filtered through the filter plate to complete the fume purification treatment, which facilitates the positioning welding of pipes of various diameters and is simple to operate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a pipe positioning device for welded pipes according to an embodiment of the present invention;

[0020] Figure 2 This is a front view of a pipe positioning device for welding pipes according to an embodiment of the present invention;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0022] Figure 4 for Figure 2 Enlarged view of point B in the image;

[0023] Figure 5 This is a top view of a pipe positioning device for welding pipes according to an embodiment of the present invention;

[0024] Figure 6 for Figure 5 Enlarged view of point C in the image;

[0025] Figure 7 This is a right view of a pipe positioning device for welding pipes according to an embodiment of the present invention;

[0026] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0027] Reference numerals: 1. Base; 2. Positioning groove; 3. Adjustment component; 31. Servo motor; 32. Threaded rod; 33. Moving block; 4. Positioning component; 41. First cylinder; 42. Second cylinder; 43. Third cylinder; 44. Fourth cylinder; 45. Limiting groove; 46. Limiting rod; 47. Limiting block; 48. Spring; 49. Fixing block; 410. Lead screw; 411. Knob; 412. Fixing groove; 5. Moving seat; 6. Support foot; 7. Purification component; 71. Top plate; 72. Exhaust fan; 73. Filter box; 74. Filter plate; 75. Clamping plate; 76. Exhaust pipe; 77. Suction nozzle. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0031] This invention proposes a pipe positioning device and method for welded pipes.

[0032] like Figures 1 to 7As shown, in one embodiment of the present invention, the pipe positioning device and method for welded pipes includes a base 1 and a positioning component 4. A positioning groove 2 is provided on the top of the base 1, an adjustment component 3 is provided on the base 1, a movable seat 5 is provided on the adjustment component 3, and support feet 6 are provided at the bottom of the base 1. Preferably, in this embodiment, the number of support feet 6 is six, which facilitates stable support for the base 1. A purification component 7 is provided on the positioning component 4. Above the movable seat 5 is a positioning component 4 that can limit the positioning of pipes of different diameters. The positioning component 4 includes a first cylinder 41, a second cylinder 42, a third cylinder 43, a fourth cylinder 44, a limiting groove 45, a limiting rod 46, a limiting block 47, a spring 48, a fixing block 49, a lead screw 410, a knob 411, and a fixing groove 412. The first cylinder 41 is located on the movable seat 5. The first cylinder 41 has a second cylinder 42 inside it, a third cylinder 43 inside it, and a fourth cylinder 44 inside it. Limiting grooves 45 are respectively opened on the inner walls of the first cylinder 41, the second cylinder 42, and the third cylinder 43. A limiting rod 46 is located between the left and right sides of the inner wall of the limiting groove 45. A limiting block 47 is sleeved on the limiting rod 46. A spring 48 is located between the inner wall of the limiting groove 45 and the limiting block 47, and is sleeved on the limiting rod 46. A fixing block 49 is located on the opposite side of the first cylinder 41. A lead screw 410 is located at the top of the fixing block 49, with its other end penetrating and extending to the bottom of the fixing block 49. A knob 411 is located at the top of the lead screw 410. Fixing grooves 412 are respectively opened on the outer surfaces of the second cylinder 42, the third cylinder 43, and the fourth cylinder 44.

[0033] Specifically, the first cylinder 41, the second cylinder 42, the third cylinder 43, and the fourth cylinder 44 are sequentially nested from the outside to the inside. The first cylinder 41, the second cylinder 42, the third cylinder 43, and the fourth cylinder 44 are all located on the same axis. The fourth cylinder 44 can conveniently limit the third cylinder 43, the third cylinder 43 can conveniently limit the second cylinder 42, and the second cylinder 42 can conveniently limit the first cylinder 41.

[0034] Specifically, there are multiple fixing slots 412, which are arranged in parallel vertically and are spaced apart horizontally. The fixing slots 412 facilitate the screw 410 to limit the second cylinder 42, the third cylinder 43 and the fourth cylinder 44.

[0035] Specifically, the adjustment component 3 includes a servo motor 31, a threaded rod 32, and a moving block 33. The servo motor 31 is located on the right side of the base 1. The threaded rod 32 is coaxially connected to the output shaft of the servo motor 31 through a coupling, and the other end passes through and is rotatably connected to the left side of the inner wall of the positioning groove 2. The moving block 33 is sleeved on the threaded rod 32 and is located inside the positioning groove 2. The top of the moving block 33 is fixedly connected to the moving seat 5.

[0036] Specifically, the threaded rod 32 is engraved with multiple threads. Preferably, in this embodiment, the number of threads is two and they are symmetrically distributed, which facilitates the movement of the moving block 33 to move to opposite sides or opposite sides.

[0037] Specifically, the purification component 7 includes a top plate 71, an exhaust fan 72, a filter box 73, a filter plate 74, a retaining plate 75, an exhaust pipe 76, and a suction nozzle 77. The top plate 71 is located on the top of the first cylinder 41 on the left side. The exhaust fan 72 is located on the top left end of the top plate 71. The filter box 73 is located on the top right end of the top plate 71 and is connected to the left side of the exhaust fan 72. The filter plate 74 is located on the inner wall of the filter box 73. The retaining plate 75 is located on the outer peripheral wall of the first cylinder 41. The exhaust pipe 76 is connected to the right side of the filter box 73 and is fitted onto the retaining plate 75. The suction nozzle 77 is connected to the end of the exhaust pipe 76 away from the filter box 73.

[0038] Specifically, there are multiple clamping plates 75, which are arranged in a ring around the first cylinder 41 to facilitate the limiting of the air extraction pipe 76.

[0039] Specifically, a portion of the suction pipe 76 is corrugated, making it easy for the suction pipe 76 to be snapped into any clamping plate 75.

[0040] On the other hand, the present invention proposes a method for using a pipe positioning device for welded pipes, comprising the following steps:

[0041] S1. When it is necessary to position and connect the welded pipes, if the outer diameter of the pipe matches the outer diameter of the fourth cylinder 44, first turn the knob 411 to adjust the screw 410 to the opposite side of the third cylinder 43 through the limiting adjustment of the fixing block 49, and then push the pipe from the opposite side of the fourth cylinder 44 to its opposite side. The limiting block 47, through the limiting rod 46, compresses the spring 48 to the opposite side, pushing the fourth cylinder 44 to the opposite side. Turn the knob 411 again to move the bottom of the screw 410 to contact the inner bottom wall of the fixing groove 412, thus limiting the fourth cylinder 44. At the same time, the inner wall of the third cylinder 43 positions the pipe. When the outer diameter of the pipe matches the outer diameter of the third cylinder 43, adjust the screw 410 to the opposite side of the second cylinder 42. Then, push the opposite sides of the third cylinder 43 and the fourth cylinder 44 through the pipe. Repeat the above operation to position the inner wall of the second cylinder 42 on the pipe.

[0042] S2. When it is necessary to position and connect the pipes on both sides, start the servo motor 31, and the threaded rod 32 drives the moving seat 5 on the moving block 33 to move to the opposite side, so that the two positioned pipes can be connected, which facilitates the positioning welding.

[0043] S3. When it is necessary to purify the fumes generated by welding pipes, firstly, attach the exhaust pipe 76 to the clamping plate 75 at the position where the pipe needs to be welded. Then, start the exhaust fan 72 so that the suction nozzle 77 can draw the fumes generated by welding into the filter box 73 through the exhaust pipe 76. Then, the fumes are filtered through the filter plate 74 to complete the fume purification treatment.

[0044] Specifically, the working principle and usage process of this invention are as follows:

[0045] When positioning and connecting welded pipes, if the outer diameter of the pipe matches the outer diameter of the fourth cylinder 44, first turn the knob 411 to adjust the lead screw 410 to the opposite side of the third cylinder 43 via the limiting block 49, thus limiting it. Then, push the pipe from the opposite side of the fourth cylinder 44 to its opposite side. The limiting block 47, through the limiting rod 46, compresses the spring 48 to the opposite side, pushing the fourth cylinder 44 to the opposite side. Then, turn the knob 411 again to move the bottom of the lead screw 410 to contact the inner bottom wall of the fixing groove 412, thus limiting the fourth cylinder 44. At the same time, the inner wall of the third cylinder 43 positions the pipe. When the outer diameter of the pipe matches the outer diameter of the third cylinder 43, adjust the lead screw 410 to the second cylinder 42. On opposite sides, the third cylinder 43 and the fourth cylinder 44 are pushed back to opposite sides through the pipe. The same operation is performed to position the inner wall of the second cylinder 42 with the pipe. When it is necessary to position and connect the pipes on both sides, the servo motor 31 is started, and the threaded rod 32 drives the moving seat 5 on the moving block 33 to move to opposite sides, so that the two positioned pipes are connected, which facilitates the positioning welding. When it is necessary to purify the fumes generated by the welding pipe, the exhaust pipe 76 is first clipped onto the clamping plate 75 at the position where the pipe needs to be welded. Then the exhaust fan 72 is started, so that the suction nozzle 77 sucks the welding fumes into the filter box 73 through the exhaust pipe 76. Then the fumes are filtered through the filter plate 74 to complete the fume purification treatment, which facilitates the positioning welding of pipes of various diameters.

[0046] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A pipe positioning device for welded pipes, characterized in that, Includes a base (1) and a positioning component (4). The top of the base (1) is provided with a positioning groove (2). The base (1) is provided with an adjustment component (3). The adjustment component (3) is provided with a movable seat (5). The bottom of the base (1) is provided with a support foot (6). The positioning component (4) is provided with a purification component (7). The movable seat (5) is provided with a positioning component (4) that can limit the position of pipes of different diameters. The positioning component (4) includes a first cylinder (41), a second cylinder (42), a third cylinder (43), and a fourth cylinder (44). 4) Limiting groove (45), limiting rod (46), limiting block (47), spring (48), fixing block (49), lead screw (410), knob (411), and fixing groove (412). The first cylinder (41) is located on the movable seat (5), the second cylinder (42) is located inside the first cylinder (41), the third cylinder (43) is located inside the second cylinder (42), and the fourth cylinder (44) is located inside the third cylinder (43). The limiting groove (45) is respectively opened in the first cylinder (41). 41) The inner walls of the second cylinder (42) and the third cylinder (43) are provided. The limiting rod (46) is located between the left and right sides of the inner wall of the limiting groove (45). The limiting block (47) is sleeved on the limiting rod (46). The spring (48) is located between the inner wall of the limiting groove (45) and the limiting block (47), and is sleeved on the limiting rod (46). The fixing block (49) is located on the opposite side of the first cylinder (41). The lead screw (410) is located at the top of the fixing block (49), and its other end passes through. And extends to the bottom of the fixing block (49), the knob (411) is located at the top of the lead screw (410), the fixing groove (412) is respectively opened on the outer surface of the second cylinder (42), the third cylinder (43) and the fourth cylinder (44), and the number of the limiting groove (45), the limiting rod (46), the limiting block (47) and the spring (48) are all multiple, and the multiple limiting grooves (45), the limiting rods (46), the limiting blocks (47) and the springs (48) are all distributed in parallel front and back.

2. The pipe positioning device for welded pipes according to claim 1, characterized in that, The first cylinder (41), the second cylinder (42), the third cylinder (43) and the fourth cylinder (44) are nested from the outside to the inside, and the first cylinder (41), the second cylinder (42), the third cylinder (43) and the fourth cylinder (44) are all located on the same axis.

3. The pipe positioning device for welded pipes according to claim 1, characterized in that, The number of fixing slots (412) is multiple, and the multiple fixing slots (412) are arranged in parallel vertically and are spaced apart horizontally.

4. The pipe positioning device for welded pipes according to claim 1, characterized in that, The adjustment component (3) includes a servo motor (31), a threaded rod (32), and a moving block (33). The servo motor (31) is located on the right side of the base (1). The threaded rod (32) is coaxially connected to the output shaft of the servo motor (31) through a coupling, and the other end passes through and is rotatably connected to the left side of the inner wall of the positioning groove (2). The moving block (33) is sleeved on the threaded rod (32) and located inside the positioning groove (2). The top of the moving block (33) is fixedly connected to the moving seat (5).

5. The pipe positioning device for welded pipes according to claim 4, characterized in that, The threaded rod (32) has multiple thread segments engraved on it, and they are symmetrically distributed.

6. The pipe positioning device for welded pipes according to claim 4, characterized in that, The purification component (7) includes a top plate (71), an exhaust fan (72), a filter box (73), a filter plate (74), a retaining plate (75), an exhaust pipe (76), and a suction nozzle (77). The top plate (71) is located on the top of the first cylinder (41) on the left side. The exhaust fan (72) is located on the top left end of the top plate (71). The filter box (73) is located on the top right end of the top plate (71) and is connected to the left side of the exhaust fan (72). The filter plate (74) is located on the inner wall of the filter box (73). The retaining plate (75) is located on the outer peripheral wall of the first cylinder (41). The exhaust pipe (76) is connected to the right side of the filter box (73) and is fitted onto the retaining plate (75). The suction nozzle (77) is connected to the end of the exhaust pipe (76) away from the filter box (73).

7. The pipe positioning device for welded pipes according to claim 6, characterized in that, The number of the card plates (75) is multiple, and the multiple card plates (75) are arranged in a ring around the first cylinder (41) as the axis.

8. The pipe positioning device for welded pipes according to claim 6, characterized in that, The exhaust pipe (76) is partially corrugated.

9. The method of using the pipe positioning device for welded pipes according to claim 8, characterized in that, Includes the following steps: S1. When it is necessary to position and connect the welded pipes, if the outer diameter of the pipe matches the outer diameter of the fourth cylinder (44), first turn the knob (411) to adjust the screw (410) to the opposite side of the third cylinder (43) through the limiting adjustment of the fixing block (49) to limit it. Then push the pipe from the opposite side of the fourth cylinder (44) to its opposite side. The limiting block (47) squeezes the spring (48) to the opposite side through the limiting rod (46) to push the fourth cylinder (44) to the opposite side. Then... Turn the knob (411) to move the bottom of the screw (410) to contact the inner bottom wall of the fixed groove (412), thereby limiting the fourth cylinder (44) and positioning the pipe with the inner wall of the third cylinder (43). When the outer diameter of the pipe matches the outer diameter of the third cylinder (43), adjust the screw (410) to the opposite side of the second cylinder (42). Then push the opposite sides of the third cylinder (43) and the fourth cylinder (44) through the pipe. Repeat the above operation to position the inner wall of the second cylinder (42) with the pipe. S2. When it is necessary to position and connect the pipes on both sides, start the servo motor (31), and the threaded rod (32) drives the moving seat (5) on the moving block (33) to move to the opposite side, so that the two positioned pipes are connected, which facilitates the positioning welding. S3. When it is necessary to purify the fumes generated by welding pipes, first attach the exhaust pipe (76) to the clamp plate (75) at the position where the pipe needs to be welded, then start the exhaust fan (72) so that the nozzle (77) can suck the fumes generated by welding into the filter box (73) through the exhaust pipe (76), and then filter the fumes through the filter plate (74) to complete the fume purification treatment.

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