A road bridge steel structure welding device
By introducing automatic cleaning and dust removal mechanisms into the bridge steel structure welding device, the welding surface and flux cleaning problems are solved, the welding quality is improved, the generation of pores is avoided, and a high degree of automation is achieved.
Patent Information
- Application Number
- CN202411155576.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2044-08-22
AI Technical Summary
The existing bridge steel structure welding device cannot effectively clean the welding surface and flux, resulting in poor welding quality and easy pores during welding.
A welding device including a wire outlet part, a flux placement part and a cleaning part fixedly installed on a mobile car is designed, and the welding surface is automatically cleaned using a wire outlet part, a suction part and a connecting part, and through a one-way exhaust pipe. Clean the flux with dust collector tank to ensure the cleanliness of the welding surface and flux.
Automatic welding surface cleaning and flux dust removal are achieved, avoiding the generation of pores in the weld, improving welding quality, and simple structure and low cost of use.
Smart Images
Figure CN118664035B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of welding devices, and in particular to a welding device for road and bridge steel structures. Background Art
[0002] Steel structure is one of the main types of building structures at present. Steel structure components are often used in the construction of roads and bridges. Generally, steel structure components are simply welded before being transported to the construction site to reduce the difficulty of on-site construction. However, some components are large in size. If welding is performed in advance, it may increase the difficulty of transportation and the welding surface may easily separate during transportation, affecting the stability of subsequent use. Therefore, some bridge steel structures need to be welded at the construction site.
[0003] At present, the common welding methods at bridge construction sites include manual arc welding, submerged arc welding and gas shielded welding, among which submerged arc welding has better welding quality and welding speed. However, the existing submerged arc welding device cannot clean the welding surface during use. The impurities and dust present therein will cause pores in the weld, affecting the welding quality. The flux cannot be cleaned. The dust and impurities present therein will also have an adverse effect on the welding quality. Therefore, it is necessary to design a road bridge steel structure welding device. Summary of the invention
[0004] In view of the deficiencies in the prior art, the present invention provides a road bridge steel structure welding device, which solves the problem in the above background technology that the welding surface and the flux cannot be cleaned, resulting in poor welding quality.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions:
[0006] A road bridge steel structure welding device comprises two wire outlet seats fixedly mounted at both ends of a moving trolley, and also comprises:
[0007] A wire outlet portion, the wire outlet portion comprises a welding wire reel mounted on a wire outlet seat, and the welding wire is wound on the welding wire reel, a welding head matched with the welding wire is fixedly mounted on the bottom of the wire outlet seat, and a wire outlet assembly is mounted on the wire outlet seat;
[0008] A soldering flux delivery part, the soldering flux delivery part comprising a soldering flux delivery seat fixedly mounted on the soldering head through a connecting frame, a soldering flux cleaning delivery component being mounted at the lower end of the soldering flux delivery seat;
[0009] The cleaning part includes a pressure regulating box fixedly mounted on the side wall of the flux delivery seat, and a cleaning box is mounted on the lower end of the pressure regulating box through a connecting assembly, a suction assembly is mounted on the pressure regulating box, and the suction assembly cooperates with the wire outlet assembly and the connecting assembly, the bottom of the cleaning box is fixedly connected to a base plate by bolts, and a plurality of cleaning strips are fixedly mounted on the bottom of the base plate.
[0010] Furthermore, a plurality of telescopic brackets are fixedly mounted on the mobile trolley, and each telescopic bracket is fixedly connected to the corresponding wire outlet seat and flux delivery seat, and a power device and a control box are fixedly mounted on the mobile trolley.
[0011] Furthermore, the wire output assembly includes a motor fixedly mounted on the side wall of the wire output seat, and a plurality of rotating rods are rotatably mounted on the wire output seat, each of the rotating rods is fixedly mounted with a wire feeding wheel, one of the rotating rods is fixedly connected to the output end of the motor, and a transmission structure is installed between the plurality of rotating rods.
[0012] Furthermore, the transmission structure includes a plurality of connecting gears fixedly mounted on corresponding rotating rods, and each two connecting gears corresponding to the left and right positions are meshed with each other, wherein a belt transmission assembly is installed between the two rotating rods corresponding to the upper and lower positions.
[0013] Furthermore, a one-way exhaust pipe is fixedly connected between the bottom of the pressure regulating box and the cleaning box, two groups of air holes are opened on the bottom plate, and the two groups of air holes are located between multiple cleaning strips, and a filter is fixedly installed in the cleaning box.
[0014] Furthermore, the suction assembly includes a piston sealed and slidably connected in the pressure regulating box, and a connecting rod is fixedly installed on the top of the piston, a convex rod is fixedly installed on one of the rotating rods, and a side rod is fixedly installed on the side wall of the convex rod, and a support rod that slides with the connecting rod is rotatably installed on the side rod.
[0015] Furthermore, the connecting assembly includes a slider fixedly installed on the upper end of the cleaning box, two support blocks are fixedly installed on the bottom of the pressure regulating box, and a screw that cooperates with the slider is rotatably connected between the two support blocks, a fixed gear is fixedly installed on the side wall of the screw, and a fixed rack that meshes with the fixed gear is fixedly installed on the side wall of the connecting rod.
[0016] Furthermore, the flux cleaning delivery assembly includes a material guide seat fixedly connected to the bottom of the flux delivery seat, and a sieve plate is fixedly installed on the top of the material guide seat. A one-way exhaust pipe is fixedly connected between the pressure regulating box and the material guide seat, and the one-way exhaust pipe is located at the bottom of the piston and the sieve plate.
[0017] Furthermore, an air outlet slot cooperating with the one-way exhaust pipe is provided on the inner wall of the material guide seat, a dust collecting slot corresponding to the position of the air outlet slot is provided on the side wall of the material guide seat, and a dust collecting bag is installed on the dust collecting slot.
[0018] Furthermore, the cleaning strip, the material guide seat and the welding head are arranged in sequence from left to right, and the horizontal heights increase in sequence.
[0019] Compared with the prior art, the present invention has the following advantages:
[0020] 1: The road bridge steel structure welding device has the advantage of automatically cleaning the welding surface during the welding process, which effectively ensures the welding quality. Specifically, through the setting of the cleaning part, impurities and dust on the welding surface can be cleaned and collected during the welding process, thereby improving the neatness of the welding surface.
[0021] 2: The road bridge steel structure welding device has the advantage of cleaning the flux during the welding process, further ensuring the welding quality. Specifically, through the setting of the flux delivery part, the dust removal of the flux can be completed simultaneously during the welding process by utilizing the operation of the cleaning part.
[0022] 3: The road bridge steel structure welding device has the advantages of simple structure and low cost. Specifically, through the cooperation of the suction component and the connection component, the welding surface can be cleaned and the flux dust can be removed during the wire feeding process without manual control.
[0023] In summary, the present invention can utilize the welding wire conveying operation to automatically complete the advance cleaning of the welding surface during the welding process, effectively avoiding the formation of pores in the weld. At the same time, the dust removal of the flux can be simultaneously completed during the welding surface cleaning process, avoiding the adverse effects of dust in the flux on welding. The overall degree of automation is high, which can effectively ensure the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a schematic diagram of the structure of a road bridge steel structure welding device proposed by the present invention;
[0025] Figure 2 for Figure 1 Schematic diagram of the structure after being deflected to the left by a certain angle;
[0026] Figure 3 for Figure 2 The structural diagram of the mobile trolley;
[0027] Figure 4 for Figure 2 An enlarged schematic diagram of the structure of the wire outlet seat and its connecting components located in the front section;
[0028] Figure 5 for Figure 4 An enlarged schematic diagram of the structure of the middle wire holder and the welding head;
[0029] Figure 6 for Figure 5 Schematic diagram of the structure after removing the wire outlet seat;
[0030] Figure 7 for Figure 4 An enlarged schematic diagram of the structure of the flux inserting seat and the material guide seat;
[0031] Figure 8 for Figure 7 Schematic diagram of structural decomposition;
[0032] Fig. 9 for Figure 4 An enlarged schematic diagram of the structure of the middle pressure regulating box and the cleaning plate;
[0033] Fig.10 for Fig. 9 A top view of
[0034] Fig.11 for Fig.10 The structural diagram of the middle A surface;
[0035] Fig.12 for Fig.11 Schematic diagram of the three-dimensional structure.
[0036] In the figure: 1. Mobile trolley; 2. Wire outlet seat; 3. Wire reel; 4. Welding wire; 5. Welding head; 6. Transmission structure; 7. Motor; 8. Rotating rod; 9. Wire feeding wheel; 10. Flux delivery seat; 11. Pressure regulating box; 12. Cleaning box; 13. Bottom plate; 14. Cleaning strip; 15. Connecting frame; 16. One-way exhaust pipe; 17. Piston; 18. Connecting rod; 19. Support rod; 20. Protruding rod; 21. Side rod; 22. Filter; 23. One-way exhaust pipe; 24. Material guide seat; 25. Air outlet slot; 26. Dust collecting slot; 27. Dust collecting bag; 28. Sieve plate; 29. Support block; 30. Lead screw; 31. Sliding block; 32. Fixed gear; 33. Fixed rack. DETAILED DESCRIPTION
[0037] Reference Figure 1-Figure 2 , a road bridge steel structure welding device, comprising two wire outlet seats 2 fixedly mounted at both ends of a mobile trolley 1, and also comprising:
[0038] The wire outlet section is used for processing the wire 4, and the wire outlet section includes a wire reel 3 installed on the wire outlet seat 2, and the wire reel 3 is wound with the welding wire 4; the flux delivery section is used for processing the flux delivery, and the flux delivery section includes a flux delivery seat 10 fixedly installed on the welding head 5 through a connecting frame 15; the cleaning section is used for cleaning the welding surface in advance during the welding process, and the cleaning section includes a voltage regulating box 11 fixedly installed on the side wall of the flux delivery seat 10.
[0039] Reference Figure 3 The mobile trolley 1 is used as a mobile component for moving the welding device. It is equipped with multiple telescopic brackets, and each telescopic bracket is fixedly connected to the corresponding wire outlet seat 2 and flux delivery seat 10. The telescopic bracket can adopt existing hydraulic telescopic rods and other common telescopic products, which are used to adjust the height of the welding device relative to the welding surface, so as to facilitate real-time control of the welding operation process. The mobile trolley 1 is fixedly installed with a power device and a control box. The power device is used to power the welding device, and the control box is used to control the specific operation of the welding device. The power device and the control box are existing products, and their working principles and specific structures are not elaborated here.
[0040] Reference Figure 1-Figure 2 as well as Figure 4-Figure 6 A welding head 5 matching the welding wire 4 is fixedly installed at the bottom of the wire outlet seat 2, and a wire outlet assembly is installed on the wire outlet seat 2. The wire outlet assembly includes a motor 7 fixedly installed on the side wall of the wire outlet seat 2, and a plurality of rotating rods 8 are rotatably installed on the wire outlet seat 2, one of which is fixedly connected to the output end of the motor 7. The motor 7 adopts a motor that can only rotate in one direction, which is common in daily life and work. When it rotates, it can drive the rotating rod 8 connected to it to rotate at the same time.
[0041] A wire feeding wheel 9 is fixedly mounted on each rotating rod 8, and a transmission structure 6 is installed between the multiple rotating rods 8. The transmission structure 6 includes multiple connecting gears fixedly mounted on the corresponding rotating rods 8, and each two connecting gears corresponding to the left and right positions are meshed with each other. A belt transmission assembly is installed between the two rotating rods 8 corresponding to the upper and lower positions. Under the action of the multiple connecting gears, the two adjacent rotating rods 8 on the left and right can rotate relative to each other. At the same time, under the action of the belt transmission assembly, the belt transmission assembly is a prior art, and its working principle and specific structure are not elaborated here. The corresponding two rotating rods 8 can rotate in the same direction. Therefore, when the motor 7 is working, the wire feeding wheels 9 on the two groups of left and right relative rotating rods 8 can rotate relative to each other at the same time, so as to realize the conveying and processing of the welding wire 4. Two brackets are fixedly mounted on the wire outlet seat 2, and a rotating shaft fixedly connected to the welding wire reel 3 is rotatably mounted between the two brackets. Through the design of the rotating shaft, when the welding wire 4 is conveyed by the wire feeding wheel 9, the welding wire reel 3 can rotate at the same time under the pulling action of the welding wire 4, so as to ensure that the welding wire 4 is conveyed stably and smoothly.
[0042] Reference Figure 1-Figure 2 as well as Figure 4-Figure 12 A cleaning box 12 is installed at the lower end of the pressure regulating box 11 through a connecting assembly, and a one-way exhaust pipe 16 is fixedly connected between the bottom of the pressure regulating box 11 and the cleaning box 12. The bottom of the cleaning box 12 is fixedly connected to a bottom plate 13 by bolts, and a plurality of cleaning strips 14 are fixedly installed at the bottom of the bottom plate 13. Two groups of air holes are opened on the bottom plate 13, and the two groups of air holes are located between the plurality of cleaning strips 14. The position design of the air holes can ensure its dust absorption effect. A filter screen 22 is fixedly installed in the cleaning box 12. The design of the filter screen 22 can prevent dust and impurities from entering the one-way exhaust pipe 16. The one-way exhaust pipe 16 is used to allow gas to enter the cleaning box 12 through the air holes in one direction.
[0043] Before welding the steel structure of the bridge, the contact and friction between multiple cleaning strips 14 and the welding surface and the extraction effect of multiple pores can be used to remove impurities and dust on the welding surface, thereby improving the cleanliness of the welding surface, avoiding the possibility of pores in the weld, and ensuring the welding quality. At the same time, the detachable connection design between the base plate 13 and the cleaning box 12 can facilitate the staff to clean the dust and impurities adsorbed in the voltage regulating box 11 after using the welding device for a period of time, and replace the base plate 13 and the lower cleaning strip 14. The cleaning strip 14 can be made of existing common cleaning products such as grinding sandpaper and scouring pad, and can be selected according to actual usage.
[0044] A suction assembly is installed on the pressure regulating box 11, and the suction assembly includes a piston 17 that is sealingly and slidably connected in the pressure regulating box 11. When the piston 17 moves up and down in the pressure regulating box 11, the air pressure in the bottom space of the pressure regulating box 11 can be regulated. When the piston 17 moves up, a negative pressure is generated in the bottom space of the pressure regulating box 11. Conversely, when the piston 17 moves down, a positive pressure is generated in the bottom space of the pressure regulating box 11.
[0045] A connecting rod 18 is fixedly installed on the top of the piston 17, and a convex rod 20 is fixedly installed on one of the rotating rods 8, and a side rod 21 is fixedly installed on the side wall of the convex rod 20. A support rod 19 that slides with the connecting rod 18 is rotatably installed on the side rod 21. A cross bar is fixedly installed on the end of the connecting rod 18 away from the piston 17, and a movable groove that cooperates with the cross bar is provided on the side wall of the end of the support rod 19 away from the side rod 21. The cross bar and the movable groove are not marked in the figure. At the same time, the length of the cross bar should be greater than twice the length of the side rod 21. When the rotating rod 8 rotates, the support rod 19 can be driven to swing through the side rod 21. Since the pressure regulating box 11 limits the moving direction of the connecting rod 18, the connecting rod 18 can only move up and down with the swing of the side rod 21. At this time, the sliding arrangement of the support rod 19 and the connecting rod 18 can compensate for the lateral movement distance of the side rod 21 during the swinging process, ensuring that the rotation of the rotating rod 8 can smoothly drive the piston 17 to move up and down through the connecting rod 18, thereby ensuring the driving effect of the suction component.
[0046] The connecting assembly includes a slider 31 fixedly mounted on the upper end of the cleaning box 12, and two support blocks 29 are fixedly mounted on the bottom of the pressure regulating box 11, and a lead screw 30 cooperating with the slider 31 is rotatably connected between the two support blocks 29. Through the cooperation effect of the lead screw 30 and the slider 31, the cleaning box 12 can slide back and forth relative to the pressure regulating box 11. Since the moving trajectory of the mobile trolley 1 is left and right movement, the cooperation between the two can make the cleaning strip 14 effectively rub and clean the welding surface relative to the welding surface during welding to ensure the cleaning effect. At the same time, in order to ensure that the cleaning box 12 is not restricted by the one-way exhaust pipe 16 during the forward and backward movement, a bellows can be used for the upper half of the one-way exhaust pipe 16. A fixed gear 32 is fixedly mounted on the side wall of the lead screw 30, and a fixed rack 33 meshing with the fixed gear 32 is fixedly mounted on the side wall of the connecting rod 18. Through the cooperation of the fixed rack 33 and the fixed gear 32, a driving force can be provided for the positive and reverse rotation of the lead screw 30 during the up and down movement of the connecting rod 18.
[0047] A flux cleaning delivery component is installed at the lower end of the flux delivery seat 10, and the flux cleaning delivery component includes a material guide seat 24 fixedly connected to the bottom of the flux delivery seat 10, and a sieve plate 28 is fixedly installed on the top of the material guide seat 24. Through the setting of the sieve plate 28, the delivered flux can be screened to avoid the problem of poor air permeability caused by large differences in the particle size of the delivered flux, which affects the welding effect. A one-way exhaust pipe 23 is fixedly connected between the pressure regulating box 11 and the material guide seat 24, and the one-way exhaust pipe 23 is located at the bottom of the piston 17 and the sieve plate 28. The design of the one-way exhaust pipe 23 can discharge the gas in the bottom space of the pressure regulating box 11 when the piston 17 moves downward, and use this part of the gas to remove dust from the screened flux, thereby improving the cleanliness of the flux and further improving the welding quality.
[0048] An air outlet slot 25 cooperating with the one-way exhaust pipe 23 is provided on the inner wall of the material guide seat 24, and a dust collecting slot 26 corresponding to the position of the air outlet slot 25 is provided on the side wall of the material guide seat 24, and a dust collecting bag 27 is installed on the dust collecting slot 26. Through the cooperation between the dust collecting slot 26 and the dust collecting bag 27, the dust blown out of the flux can be collected for subsequent unified treatment.
[0049] The cleaning strip 14, the material guide seat 24 and the welding head 5 are arranged from left to right in sequence, and the horizontal height increases in sequence. The advantage of the size design here is that it can ensure that the cleaning strip 14 contacts the welding surface first during the welding process, ensuring that the welding surface can be cleaned before welding.
[0050] In the present invention, the working principle of a road bridge steel structure welding device includes the following steps:
[0051] Preliminary preparation: transport the device to the construction site, select the welding wire 4 of the corresponding diameter according to the site conditions, and adjust the current, voltage and moving speed of the mobile trolley 1 used by the welding device through the control box, and adjust the height and position of the welding head 5 so that it is in a straight line with the welding surface;
[0052] Welding process: After the preparation work is completed, the mobile carriage 1 is moved in a straight line and the motor 7 is turned on. At the same time, the flux is put into the flux putting seat 10 through the discharge assembly. At this time, the flux covers the welding surface, and under the operation of the wire discharge assembly, the welding wire 4 is conveyed to make it contact with the welding surface. At this time, the submerged arc welding process can be completed;
[0053] Cleaning of the welding surface during welding: During welding, since the cleaning strip 14 contacts the welding surface first, during the movement of the mobile trolley 1, the cleaning strip 14 will first rub and clean the welding surface, and when the motor 7 is working, the operation of the suction component will cause the cleaning box 12 to generate negative pressure to extract dust on the welding surface and impurities under cleaning, so as to ensure the clean surface is tidy, avoid the formation of pores in the weld after welding, and ensure the welding quality;
[0054] When the motor 7 is working, the operation of the suction assembly will cause the connection assembly to operate at the same time, and at this time, the cleaning box 12 is driven to move forward and backward relative to the voltage regulating box 11, thereby improving the cleaning effect of the cleaning strip 14 on the welding surface;
[0055] Dust removal of flux during welding: During welding, due to the operation of the suction component, the one-way exhaust pipe 23 will intermittently spray gas into the material guide seat 24. The gas can blow the dust in the flux into the dust collecting bag 27, thereby improving the cleanliness of the flux.
[0056] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.
Claims
1. A road bridge steel structure welding device, comprising two wire outlet seats (2) fixedly mounted at both ends of a mobile trolley (1), characterized in that: Also includes: A wire outlet portion, the wire outlet portion comprising a welding wire reel (3) mounted on a wire outlet seat (2), a welding wire (4) being wound on the welding wire reel (3), a welding head (5) matching the welding wire (4) being fixedly mounted on the bottom of the wire outlet seat (2), and a wire outlet assembly being mounted on the wire outlet seat (2); A soldering flux delivery portion, the soldering flux delivery portion comprising a soldering flux delivery seat (10) fixedly mounted on the welding head (5) via a connecting frame (15), a soldering flux cleaning delivery component being mounted at the lower end of the soldering flux delivery seat (10); A cleaning section, the cleaning section comprising a pressure regulating box (11) fixedly mounted on a side wall of a solder flux delivery seat (10), a cleaning box (12) being mounted on the lower end of the pressure regulating box (11) via a connecting assembly, a suction assembly being mounted on the pressure regulating box (11), and the suction assembly being matched with the wire outlet assembly and the connecting assembly, a bottom plate (13) being fixedly connected to the bottom of the cleaning box (12) via bolts, and a plurality of cleaning strips (14) being fixedly mounted on the bottom of the bottom plate (13); The wire outlet assembly comprises a motor (7) fixedly mounted on a side wall of a wire outlet seat (2); a plurality of rotating rods (8) are rotatably mounted on the wire outlet seat (2); a wire feeding wheel (9) is fixedly mounted on each of the rotating rods (8); one of the rotating rods (8) is fixedly connected to an output end of the motor (7); and a transmission structure (6) is mounted between the plurality of rotating rods (8); The suction assembly comprises a piston (17) which is sealingly and slidably connected in a pressure regulating box (11), and a connecting rod (18) is fixedly mounted on the top of the piston (17); a convex rod (20) is fixedly mounted on one of the rotating rods (8), and a side rod (21) is fixedly mounted on the side wall of the convex rod (20); a supporting rod (19) which is slidably matched with the connecting rod (18) is rotatably mounted on the side rod (21); The connection assembly comprises a slider (31) fixedly mounted on the upper end of the cleaning box (12); two support blocks (29) are fixedly mounted on the bottom of the pressure regulating box (11); a lead screw (30) matched with the slider (31) is rotatably connected between the two support blocks (29); a fixed gear (32) is fixedly mounted on the side wall of the lead screw (30); and a fixed rack (33) meshing with the fixed gear (32) is fixedly mounted on the side wall of the connecting rod (18); The solder flux cleaning delivery assembly comprises a material guide seat (24) fixedly connected to the bottom of the solder flux delivery seat (10), and a sieve plate (28) is fixedly installed on the top of the material guide seat (24); a one-way exhaust pipe (23) is fixedly connected between the pressure regulating box (11) and the material guide seat (24), and the one-way exhaust pipe (23) is located at the bottom of the piston (17) and the sieve plate (28); An air outlet slot (25) cooperating with the one-way exhaust pipe (23) is provided on the inner wall of the material guide seat (24), a dust collecting slot (26) corresponding to the position of the air outlet slot (25) is provided on the side wall of the material guide seat (24), and a dust collecting bag (27) is installed on the dust collecting slot (26).
2. A road bridge steel structure welding device according to claim 1, characterized in that: A plurality of telescopic brackets are fixedly mounted on the mobile trolley (1), and each telescopic bracket is fixedly connected to a corresponding wire outlet seat (2) and a solder flux delivery seat (10), respectively. A power device and a control box are fixedly mounted on the mobile trolley (1).
3. A road bridge steel structure welding device according to claim 1, characterized in that: The transmission structure (6) comprises a plurality of connecting gears fixedly mounted on corresponding rotating rods (8), wherein each two connecting gears corresponding to the left and right positions are meshed with each other, and a belt transmission assembly is mounted between two rotating rods (8) corresponding to the upper and lower positions.
4. A road bridge steel structure welding device according to claim 1, characterized in that: A one-way air extraction pipe (16) is fixedly connected between the bottom of the pressure regulating box (11) and the cleaning box (12); two groups of air holes are provided on the bottom plate (13), and the two groups of air holes are located between the plurality of cleaning strips (14); and a filter screen (22) is fixedly installed in the cleaning box (12).
5. A road bridge steel structure welding device according to claim 1, characterized in that: The cleaning strip (14), the material guide seat (24) and the welding head (5) are arranged in sequence from left to right, and their horizontal heights increase in sequence.