Welding fume collecting system

Abstract

The utility model provides a welding fume collecting system and relates to the technical field of environmental protection equipment. And the welding fume collecting system comprises an induced draft fan, a fixed seat and a rotary arm. One end of the rotary arm is rotationally connected with the fixed seat, and a first driving part for driving the rotary arm to rotate is arranged between the rotary arm and the fixed seat. A dust collection unit capable of reciprocating relative to the rotary arm is arranged on the rotary arm, and a second driving part used for driving the dust collection unit to reciprocate is arranged between the dust collection unit and the rotary arm. And the dust collection unit is connected with the induced draft fan. According to the welding fume collecting system, the problem of station limitation is solved, the escape rate is low, and the collecting efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, in particular to a welding smoke collection system. Background Art

[0002] In the processing industry, the problem of collecting welding fumes generated during the welding and cutting process of large non-standard steel structures has become a restrictive issue in the industry.

[0003] Currently, most of the single-machine dust collection processes use fixed workstations, which require frequent movement of the workpiece to be processed during use so that the processing position is within the dust collection range. However, despite this, the current dust collection process still has problems such as high escape rate and low collection efficiency. Utility Model Content

[0004] In response to the above problems, the welding smoke collection system provided in the present application not only solves the problem of workstation limitation, but also has a low escape rate, thereby effectively improving the collection efficiency.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A welding smoke collection system comprises an induced draft fan, a fixing base and a rotating arm;

[0007] One end of the swivel arm is rotatably connected to the fixed seat, and a first driving component for driving the swivel arm to rotate is provided between the swivel arm and the fixed seat;

[0008] The rotary arm is provided with a dust collecting unit capable of reciprocating relative to the rotary arm, and a second driving component for driving the dust collecting unit to reciprocate is provided between the dust collecting unit and the rotary arm;

[0009] The dust collecting unit is connected with the induced draft fan.

[0010] Furthermore, the dust collecting unit comprises a moving box and a dust collecting cover arranged on the moving box, a moving track is arranged on the swivel arm, and a walking assembly matched with the moving track is arranged on the moving box.

[0011] Furthermore, a first avoidance hole is provided on the movable box, and the movable box is connected with the dust collecting hood through the first avoidance hole, and the induced draft fan is connected with the movable box.

[0012] Furthermore, the dust hood includes a frame that can be opened and closed and a cover mounted on the outside of the frame, the frame includes several first support rods radially arranged in a circumferential direction, one end of the first support rod facing the movable box is hinged to the movable box, a control frame is provided below the movable box, second support rods corresponding to the first support rods are provided on the control frame, one end of the second support rod is hinged to the control frame, and the other end of the second support rod is hinged to the corresponding first support rod, and the dust collecting unit also includes a control component for controlling the opening and closing of the frame.

[0013] Furthermore, the control component includes a winch arranged in the mobile box, and the free end of the traction rope of the winch passes through the first avoidance hole on the mobile box and is connected to the control frame. When the winch tightens the traction rope, the dust hood can be controlled to open by pulling the control frame upward. When the winch releases the traction rope, the dust hood will close under the action of its own gravity.

[0014] Furthermore, the movable box body is provided with a transition connection cylinder, the upper end of the cylinder body of the transition connection cylinder is inserted into the first avoidance hole, and a flange plate fixedly connected to the movable box body is provided on the cylinder body at the lower side of the movable box body, and the end of the first support rod facing the movable box body is hinged to the transition connection cylinder.

[0015] Furthermore, a connecting elbow is provided in the moving box, one end of the connecting elbow is connected to the transition connecting tube, and the other end of the connecting elbow passes through the side wall of the moving box and extends to the outside of the moving box.

[0016] Furthermore, a backflow equalizing hood is provided on the movable box body inside the dust collecting hood, the upper end of the backflow equalizing hood is connected with the first avoidance hole, a plurality of smoke holes are provided on the backflow equalizing hood, and the diameters of the smoke holes decrease successively from bottom to top.

[0017] Furthermore, a flue is provided in the swivel arm, and a smoke inlet and a smoke outlet are provided on the swivel arm. The smoke inlet is connected to the dust collecting unit through a first pipe, and the smoke outlet is connected to the induced draft fan through a second pipe.

[0018] Furthermore, the smoke inlet is located in the middle of the rotating arm, and the smoke outlet is located at one end of the rotating arm close to the fixing seat.

[0019] The beneficial effects of the utility model are:

[0020] The embodiment of the present application provides a welding smoke collection system, wherein the dust hood for collecting smoke can be moved in a plane as needed, so that the dust hood is located directly above the processing position, reducing the frequent operation problem of the welding personnel. In actual work, not only does it not need to frequently move the workpiece for processing, solving the problem of limited workstations, but also because the dust hood is always located directly above the processing position, it can also reduce the escape rate of smoke, thereby improving the smoke collection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a welding smoke collection system provided in an embodiment of the present application;

[0022] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0023] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of part B;

[0024] Figure 4 for Figure 1 A schematic diagram of the enlarged structure of the middle C part;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the skeleton part of the dust collecting hood;

[0026] Figure 6 A left view of a welding smoke collection system provided in an embodiment of the present application;

[0027] Figure 7 for Figure 6 AA section view in;

[0028] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of the D part;

[0029] Fig. 9 for Figure 7 A schematic diagram of the enlarged structure of part E in the middle;

[0030] Fig.10 for Figure 7 A schematic diagram of the enlarged structure of part F;

[0031] Fig.11 A schematic diagram of the three-dimensional structure of the dust collecting unit after removing the cover;

[0032] Fig.12 for Fig.11 Schematic diagram of the enlarged structure of part G in the middle.

[0033] In the figure: 1, fixed seat; 11, rotary axis;

[0034] 21. swivel arm; 211. flue; 212. smoke inlet; 213. smoke outlet; 22. mounting plate; 221. mounting seat; 23. rib plate; 24. moving track; 241. vertical part; 242. horizontal part;

[0035] 3. Dust collecting unit; 31. Mobile box; 32. Traveling assembly; 321. Mounting frame; 3211. Web plate; 3212. Wing plate; 322. Roller; 3221. Axle; 3222. Wheel body; 33. Dust collecting hood; 331. Frame; 3311. First support rod; 3312. Control frame; 3313. Second support rod; 332. Cover; 34. Winch; 341. Traction rope; 35. Backflow equalizing hood; 351. Smoke hole; 352. Second avoidance hole; 36. Transition connecting tube; 361. Cylinder body; 362. Flange plate; 363. Ear plate; 37. Connecting elbow;

[0036] 4. The first drive motor;

[0037] 51. Second drive motor; 52. First rack; 53. First gear; 54. Synchronous belt transmission mechanism. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described in detail below in conjunction with the drawings in the embodiments of the present application, and the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by those skilled in the art without creative work on the basis of the embodiments of the present application shall belong to the protection scope of the present application.

[0039] For the convenience of description, the coordinate system is defined as Figure 1 As shown, the left-right direction is the horizontal direction, the front-back direction is the longitudinal direction, and the up-down direction is the vertical direction.

[0040] like Figure 1 , Figure 5 and Figure 6 As shown, a welding smoke collection system includes an induced draft fan (not shown in the figure), a fixed base 1, a rotating arm 21, and a dust collection unit 3.

[0041] The fixing base 1 can be fixed on a column or wall of a building by means of fixing parts such as expansion bolts. One end of the swivel arm 21 is rotatably connected to the fixing base 1, and a first driving component for driving the swivel arm 21 to rotate relative to the fixing base 1 in a horizontal plane is provided between the swivel arm 21 and the fixing base 1. Under the driving action of the first driving component, the swivel arm 21 can rotate relative to the fixing base 1 in a horizontal plane. The dust collecting unit 3 is provided on the swivel arm 21, and can reciprocate along the length direction of the swivel arm 21 relative to the swivel arm 21, and a second driving component for driving the dust collecting unit 3 to reciprocate along the length direction of the swivel arm 21 is provided between the dust collecting unit 3 and the swivel arm 21. The dust collecting unit 3 is connected to the induced draft fan through a pipeline. During operation, the frequency conversion adjustment of the induced draft fan can be realized by pressure or flow, thereby achieving energy saving and facilitating the management of large-scale enterprises.

[0042] As a specific implementation method, Figure 2 , Figure 3 and Figure 6 As shown, in this embodiment, a mounting plate 22 is provided at one end of the swivel arm 21 facing the fixed seat 1, and the mounting plate 22 is fixedly connected to the swivel arm 21 by welding. A rib plate 23 is provided between the swivel arm 21 and the mounting plate 22, and the rib plate 23 is fixedly connected to the swivel arm 21 and the mounting plate 22 by welding. A swivel shaft 11 extending in the vertical direction is provided on the fixed seat 1, and the upper and lower ends of the swivel shaft 11 are rotatably connected to the fixed seat 1 through bearing assemblies. The mounting plate 22 is fixedly connected to the swivel shaft 11 through a mounting seat 221. Exemplarily, at least two mounting seats 221 are provided on one side of the mounting plate 22 facing the fixed seat 1, and the mounting seats 221 are fixedly connected to the mounting plate 22 by welding. A through hole for accommodating the swivel shaft 11 is provided on the mounting seat 221, and the swivel shaft 11 is fixedly connected to the mounting seat 221 by a set screw.

[0043] The first driving component includes a first driving motor 4, the power output end of the first driving motor 4 is connected to the rotating shaft 11, and the first driving motor 4 can drive the rotating shaft 11 to rotate, thereby driving the rotating arm 21 to swing in the horizontal plane. Exemplarily, the first driving motor 4 is located below the rotating shaft 11 and is fixedly connected to the fixing base 1 in a detachable manner.

[0044] like Figure 4 , Figure 6 and Figure 7As shown, the dust collecting unit 3 comprises a mobile box 31. A mobile track 24 is arranged on the lower side of the swivel arm 21, a travel assembly 32 matched with the mobile track 24 is arranged at the upper end of the mobile box 31, and a dust collecting cover 33 is arranged at the lower end of the mobile box 31.

[0045] As a specific implementation method, Figure 4 and Fig. 9 As shown, the movable track 24 in this embodiment includes a vertical portion 241 and a horizontal portion 242 located at the lower end of the vertical portion 241, and the vertical portion 241 and the horizontal portion 242 together form an inverted T-shaped structure. The walking assembly 32 includes a mounting frame 321, and rollers 322 are respectively arranged on both sides of the movable track 24 on the mounting frame 321. The rollers 322 are pressed downwardly on the horizontal portion 242 of the movable track 24 and can walk along the horizontal portion 242.

[0046] As a specific implementation, the mounting frame 321 described in this embodiment includes a web 3211, and the two ends of the web 3211 are respectively provided with wing plates 3212 extending upward perpendicular to the web 3211, and the web 3211 and the wing plates 3212 together form a U-shaped structure with an opening facing upward, and the movable track 24 is located in the U-shaped structure. The web 3211 is fixedly connected to the upper side wall of the movable box body 31 through a bolt assembly, and each of the wing plates 3212 is provided with two rollers 322. The roller 322 includes an axle 3221, and the outer end of the axle 3221 (with the side opposite to the two wing plates 3212 as the inner side) passes through the wing plates 3212 and extends to the outer side of the mounting frame 321. The outer end of the axle 3221 is provided with an end plate, and the end plate is fixedly connected to the wing plates 3212 by screws. A wheel body 3222 is provided on the wheel axle 3221 on the inner side of the wing plate 3212 (the inner side is the side opposite to the two wing plates 3212 ), and the wheel body 3222 is rotatably connected to the wheel axle 3221 via a bearing assembly.

[0047] Exemplarily, two groups of traveling components 32 are disposed on the moving box 31 , and the two groups of traveling components 32 are respectively disposed at two ends of the moving box 31 .

[0048] The second driving component includes a second driving motor 51, and the second driving motor 51 is detachably fixed on the moving box 31. A first rack 52 is provided on the rotating arm 21, and a first gear 53 meshing with the first rack 52 is rotatably provided on the moving box 31, and the first gear 53 is directly connected to the power output end of the second driving motor 51 or through a transmission mechanism.

[0049] As a specific implementation, the first rack 52 described in this embodiment is fixedly arranged on the lower side of the horizontal portion 242 of the moving track 24 by screws, the first gear 53 is rotatably arranged on a mounting frame 321 of the traveling assembly 32, and both ends of the gear shaft 3221 of the first gear 53 are rotatably connected to the wing plate 3212 of the mounting frame 321 of the traveling assembly 32 through bearing assemblies. The power output end of the second driving motor 51 is connected to the gear shaft 3221 of the first gear 53 through a synchronous belt transmission mechanism 54.

[0050] Exemplarily, the second drive motor 51 is located between the two travel assemblies 32 .

[0051] Furthermore, the dust collecting hood 33 is communicated with the movable box 31, and the induced draft fan is connected with the movable box 31 through a pipeline.

[0052] Further, in order to conveniently control the opening and closing of the dust collecting cover 33, as Figure 5 As shown, the dust collecting cover 33 comprises a frame 331 that can be opened and closed and a cover 332 that is sleeved on the outside of the frame 331. Preferably, the cover 332 is made of refractory material, and the frame 331 is made of lightweight aluminum alloy.

[0053] like Figure 7 and Fig.10 As shown, the skeleton 331 has several first support rods 3311 radially arranged along the circumferential direction, one end of the first support rod 3311 facing the mobile box 31 is hinged to the mobile box 31, a control frame 3312 is arranged below the mobile box 31, and the control frame 3312 is provided with second support rods 3313 corresponding to the first support rods 3311, one end of the second support rod 3313 is hinged to the control frame 3312, and the other end of the second support rod 3313 is hinged to the corresponding first support rod 3311. When the control frame 3312 moves up and down, the first support rod 3311 can be controlled to swing up and down by the second support rod 3313, so as to realize the opening and closing of the dust collecting hood 33.

[0054] The dust collecting unit 3 further comprises a control component for controlling the opening and closing of the dust collecting cover 33 .

[0055] As a specific implementation, the control component described in this embodiment is a winch 34 disposed in the mobile box 31. Exemplarily, the winch 34 is fixed to the upper side wall of the mobile box 31 by screws. The free end of the traction rope 341 of the winch 34 passes through the lower side wall of the mobile box 31 and is connected to the control frame 3312. A first avoidance hole for avoiding the traction rope 341 is provided on the lower side wall of the mobile box 31. Here, the first avoidance hole not only plays an avoidance role, but also serves as a connecting hole between the dust hood 33 and the mobile box 31. The smoke sink can enter the mobile box 31 through the first avoidance hole.

[0056] When the dust hood 33 needs to be opened, the hoist 34 tightens the traction rope 341 to drive the control frame 3312 to move upward. The upward movement of the control frame 3312 can drive the first support rod 3311 to swing upward through the second support rod 3313, thereby stretching the cover 332 and opening the dust hood 33. When the hoist 34 releases the traction rope 341, the first support rod 3311 will swing downward under the action of its own gravity, and at the same time drive the control frame 3312 to move downward through the second support rod 3313 to close the dust hood 33.

[0057] Furthermore, if Figure 7 and Fig.10 As shown, a backflow equalizing hood 35 is provided on the lower side of the movable box 31 inside the dust collecting hood 33, the upper end of the backflow equalizing hood 35 is connected with the first avoidance hole, and a plurality of smoke holes 351 are evenly distributed on the backflow equalizing hood 35, and the diameters of the smoke holes 351 decrease successively from bottom to top.

[0058] As a specific implementation, the backflow equalizer hood 35 described in this embodiment is a cylindrical tube structure with an open upper end and a closed lower end. The smoke hole 351 is arranged on the side wall of the backflow equalizer hood 35, and the closed end of the backflow equalizer hood 35 is provided with a second avoidance hole 352 that allows the traction rope 341 to pass through.

[0059] As a specific implementation method, Figure 8As shown, in this embodiment, a transition connection cylinder 36 is provided at the lower end of the mobile box 31, and the transition connection cylinder 36 includes a cylinder 361, and the upper end of the cylinder 361 is inserted into the first avoidance hole. A flange plate 362 is provided on the cylinder 361 at the lower side of the mobile box 31, and the flange plate 362 is fixedly connected to the lower side wall of the mobile box 31 by screws. An ear plate 363 is provided on the lower side of the flange plate 362, and the end of the first support rod 3311 facing the mobile box 31 is hinged to the ear plate 363. The lower end of the cylinder 361 is inserted into the backflow equalizing cover 35, and is fixedly connected to the backflow equalizing cover 35 by tensioning.

[0060] Furthermore, if Figure 7 Shown and Fig.10 As shown, a connecting elbow 37 is provided in the moving box 31, one end of the connecting elbow 37 is sleeved with the upper end of the cylinder 361 of the transition connecting cylinder 36, and the other end of the connecting elbow 37 passes through the side wall of the moving box 31 and extends to the outside of the moving box 31. The connecting elbow 37 is provided with a third avoidance hole for avoiding the traction rope 341.

[0061] Furthermore, in order to facilitate the pipeline, Figure 7 As shown, the swing arm 21 has a flue 211 inside, and the swing arm 21 is provided with a smoke inlet 212 and a smoke outlet 213, wherein the smoke inlet 212 is located in the middle of the swing arm 21, and the smoke outlet 213 is located at one end of the swing arm 21 close to the fixed seat 1. The smoke inlet 212 is connected to the outlet end of the connecting elbow 37 of the dust collecting unit 3 through a first pipe (not shown in the figure), and the smoke outlet 213 is connected to the induced draft fan through a second pipe (not shown in the figure). During operation, smoke can be discharged by the induced draft fan through the first pipe, the flue 211 and the second pipe in sequence.

[0062] As a specific implementation, the swivel arm 21 in this embodiment is made of a steel pipe. The internal space of the steel pipe is the flue 211, and both ends of the steel pipe are blocked by sealing plates. The steel pipe can be a rectangular pipe, a square steel pipe, a round steel pipe, a hexagonal steel pipe or a steel pipe with an irregular cross-sectional shape.

[0063] Embodiment 2

[0064] The first driving component includes a second gear fixedly disposed at the lower end of the rotating shaft 11 and a second rack meshing with the second gear, the second rack being slidably connected to the fixed seat 1 through a sliding assembly, and a third driving motor for driving the second rack to reciprocate is disposed on the fixed seat 1. When the second rack reciprocates under the driving action of the third driving motor, the rotating shaft 11 can be driven to rotate through the second gear.

[0065] Exemplarily, the sliding assembly includes two guide posts, both ends of which are fixedly connected to the support plate on the fixed seat 1, a slide is provided between the two guide posts, and the upper and lower ends of the slide are provided with guide sleeves matching with the guide posts. A first screw rod is provided between the two guide posts, and both ends of the first screw rod are rotatably connected to the fixed seat 1 through bearing assemblies, and a first nut matching with the first screw rod is provided on the slide. The power output end of the third drive motor is connected to one end of the first screw rod directly or through a transmission mechanism. The second rack is fixedly connected to the slide in a detachable manner.

[0066] The remaining structures are the same as those in the first embodiment.

[0067] Embodiment 3

[0068] The moving track 24 is a linear guide. Two linear guides are provided on the slewing arm 21, and the two linear guides are respectively provided on the left and right sides of the slewing arm 21. Vertical plates extending upward perpendicular to the moving box 31 are respectively provided on the upper end surface of the moving box 31 and located on the left and right sides of the slewing arm 21, and the lower ends of the vertical plates are fixedly connected to the moving box 31 by welding. A slider matching the linear guide is provided on the inner side surface of the vertical plate (the side opposite to the two vertical plates is the inner side). The slider is the walking assembly 32.

[0069] The second driving component includes a second screw rod located at the lower side of the swivel arm 21, and the two ends of the second screw rod are rotatably connected to the swivel arm 21 through bearing assemblies, and a second nut matched with the second screw rod is detachably fixedly provided on the upper side of the mobile box 31. The second driving motor 51 is detachably fixedly provided on the swivel arm 21, and the power output end of the second driving motor 51 is directly or through a transmission mechanism connected to one end of the second screw rod.

[0070] The remaining structures are the same as those in the first embodiment.

[0071] Embodiment 4

[0072] The first rack 52 and the first gear 53 are removed. A friction wheel is rotatably arranged on the mounting frame 321 of one of the travel assemblies 32 below the moving track 24, and the friction wheel presses upwardly the horizontal portion 242 of the moving track 24. The power output end of the second drive motor 51 is connected to the friction wheel directly or through a transmission mechanism, and is used to drive the friction wheel to rotate.

[0073] The remaining structures are the same as those in the first embodiment.

[0074] Embodiment 5

[0075] The control component is an electric push rod or a cylinder. The upper end of the backflow equalizer cover 35 is fixedly connected to the cylinder body 361 of the transition connection cylinder 36 by screwing. The cylinder body of the electric push rod or the cylinder is fixedly connected to the closed end of the flow guide equalizer cover in a detachable manner, and the rod end of the piston rod of the electric push rod or the cylinder is connected to the control frame 3312.

[0076] The remaining structures are the same as those in the first embodiment.

[0077] Other embodiments obtained by those skilled in the art by combining, splitting, reorganizing, etc. the embodiments of the present application on the basis of the embodiments provided in the present application do not exceed the protection scope of the present application.

[0078] The above specific implementation methods have detailed the purpose, technical solutions and beneficial effects of the embodiments of the present application. The above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. That is, any modifications, equivalent substitutions, improvements, etc. made on the basis of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A welding smoke collection system, characterized in that: It comprises an induced draft fan, a fixing base (1) and a rotating arm (21); One end of the swivel arm (21) is rotatably connected to the fixed seat (1), and a first driving component for driving the swivel arm (21) to rotate is provided between the swivel arm (21) and the fixed seat (1); The rotary arm (21) is provided with a dust collecting unit (3) capable of reciprocating relative to the rotary arm (21); a second driving component for driving the dust collecting unit (3) to reciprocate is provided between the dust collecting unit (3) and the rotary arm (21); The dust collecting unit (3) is connected to the induced draft fan.

2. A welding smoke collection system according to claim 1, characterized in that: The dust collecting unit (3) comprises a movable box (31) and a dust collecting cover (33) arranged on the movable box (31); a movable track (24) is arranged on the rotary arm (21); and a walking assembly (32) matched with the movable track (24) is arranged on the movable box (31).

3. A welding smoke collection system according to claim 2, characterized in that: The movable box (31) is provided with a first avoidance hole, and the movable box (31) is connected to the dust collecting hood (33) through the first avoidance hole, and the induced draft fan is connected to the movable box (31).

4. A welding smoke collection system according to claim 3, characterized in that: The dust collecting hood (33) comprises a frame (331) that can be opened and closed and a cover (332) mounted on the outside of the frame (331); the frame (331) comprises a plurality of first support rods (3311) that are radially arranged along a circumferential direction; one end of the first support rod (3311) that faces the movable box (31) is hinged to the movable box (31); a control frame (3312) is arranged below the movable box (31); second support rods (3313) corresponding to the first support rods (3311) are arranged on the control frame (3312); one end of the second support rod (3313) is hinged to the control frame (3312); the other end of the second support rod (3313) is hinged to the corresponding first support rod (3311); the dust collecting unit (3) further comprises a control component for controlling the opening and closing of the frame (331).

5. A welding smoke collection system according to claim 4, characterized in that: The control component includes a winch (34) arranged in the mobile box (31), and the free end of the traction rope (341) of the winch (34) passes through the first avoidance hole on the mobile box (31) and is connected to the control frame (3312). When the winch (34) tightens the traction rope (341), the dust hood (33) can be controlled to open by pulling the control frame (3312) upwards. When the winch (34) loosens the traction rope (341), the dust hood (33) will close under the action of its own gravity.

6. A welding smoke collection system according to claim 4, characterized in that: The movable box body (31) is provided with a transition connection cylinder (36), the upper end of the cylinder body (361) of the transition connection cylinder (36) is inserted into the first avoidance hole, and a flange plate (362) fixedly connected to the movable box body (31) is provided on the cylinder body (361) at the lower side of the movable box body (31), and one end of the first support rod (3311) facing the movable box body (31) is hinged to the transition connection cylinder (36).

7. A welding smoke collection system according to claim 6, characterized in that: A connecting elbow (37) is provided in the movable box (31), one end of the connecting elbow (37) is connected to the transition connecting tube (36), and the other end of the connecting elbow (37) passes through the side wall of the movable box (31) and extends to the outside of the movable box (31).

8. A welding smoke collection system according to claim 3, characterized in that: A backflow equalizing hood (35) is arranged on the movable box (31) inside the dust collecting hood (33), the upper end of the backflow equalizing hood (35) is connected to the first avoidance hole, and a plurality of smoke holes (351) are arranged on the backflow equalizing hood (35), and the diameters of the smoke holes (351) decrease successively from bottom to top.

9. A welding smoke collection system according to claim 1, characterized in that: The swivel arm (21) has a flue (211) therein, and a smoke inlet (212) and a smoke outlet (213) are provided on the swivel arm (21); the smoke inlet (212) is connected to the dust collecting unit (3) via a first pipe, and the smoke outlet (213) is connected to the induced draft fan via a second pipe.

10. A welding smoke collection system according to claim 9, characterized in that: The smoke inlet (212) is located in the middle of the rotating arm (21), and the smoke outlet (213) is located at one end of the rotating arm (21) close to the fixing seat (1).

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