Welding device for constructional engineering steel structure

Abstract

The invention relates to the technical field of building steel structure welding, and particularly discloses a building engineering steel structure welding device which comprises a rack, a first roller and a third roller which are used for assisting in pushing a steel plate are arranged on the top face of the rack, and a welding gun is arranged in the middle of the rack; the second roller is arranged above the first roller in a lifting mode, and sliding sleeves are arranged on the outer sides of the first roller, the second roller and the third roller in a sliding and sleeving mode; and the fixing frame is connected between the first roller and the third roller in a front-back sliding mode, a liftable mounting frame is arranged on the inner side of the fixing frame, a driving wheel used for pushing the steel plate is rotationally mounted on the inner side of the mounting frame, and an anti-skid cushion pad is attached to the outer side of the driving wheel. According to the constructional engineering steel structure welding device, after different steel structures are tailor-welded and fixed, stable conveying of the steel structures and fixing structures of the steel structures can be kept, stable welding can be achieved, and the welding quality is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and more particularly to the field of building steel structure welding technology, specifically a building steel structure welding device. Background Technology

[0002] With the continuous development of construction engineering technology, high-rise buildings are commonplace. In order to reduce the overall weight of high-rise buildings, a large amount of steel structure is used to form a frame for support, such as H-beams and I-beams. In order to improve the construction speed, the steel structure is generally pre-welded and then assembled on site. For example, patent CN 118951518 B discloses a steel structure positioning and welding device, including a processing chamber installed on the top surface of a base. A transmission assembly for conveying steel beams is provided on one side of the processing chamber. In this invention, the steel beams are conveyed at a fixed point above a transfer plate via the transmission assembly. The steel components are then positioned and conveyed by the transmission assembly to a limiting and flipping push assembly for fixation. After being rotated 90 degrees clockwise, the steel components are rotated to a vertical position, at which point the lower surface of the steel component is horizontally aligned with the upper surface of the steel beam. The limiting and flipping push assembly then horizontally pushes the steel component to a welding position for fixed-point welding. Finally, a rotating welding assembly completes the uniform welding of the connection between the steel beams and the steel components. Because both the steel beams and the steel components are clamped during welding, the accuracy of the welding points is improved, thereby enhancing the welding quality. For example, patent application publication number CN120551671A discloses a steel structure processing and welding device, including a welding assembly. The bottom of the welding assembly is provided with a welding torch, and the bottom of the welding torch is provided with a welding structure. The welding structure includes a welding head and a storage rack. The bottom of the storage rack is rotatably provided with a drive wheel, and the bottom of the drive wheel is provided with two rotating rods. The top of one of the rotating rods is fixedly connected to the bottom of the drive wheel. The welding structure provided by this invention can control the welding head to adaptively adjust the angle when welding steel at different angles through a fixed wheel set and a movable wheel, so that the welding head is always at a better welding angle, ensuring the welding quality of the steel. The fixed wheel set and the positioning plate cooperate to ensure that one side of the steel to be welded is always perpendicular. At this time, the movable wheel will control the welding head to adaptively adjust according to the offset angle of the other side of the steel. However, based on the actual use of current building welding equipment in the welding process of steel structures, there are still some drawbacks. For example, when welding different steel components, such as angle steel, box beams, and connecting ends, it is not possible to ensure that the welding surface fixing mechanism follows the steel structure stably, which is not conducive to maintaining the stability of the connection and affects the welding quality.

[0003] Therefore, we propose a welding device for steel structures in building engineering to solve the problems mentioned above. Summary of the Invention

[0004] The purpose of this invention is to provide a welding device for steel structures in building engineering, in order to solve the problem that the current welding devices mentioned in the background art cannot guarantee that the welding surface fixing mechanism can stably follow the steel structure when welding different steel components, such as angle steel, box beams, and connecting ends, which is not conducive to maintaining the stability of the connection and affects the welding quality.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a steel structure welding device for building engineering, comprising: a frame, wherein a first roller and a third roller for assisting in pushing steel plates are provided on the top surface of the frame, and a welding torch is provided in the middle of the frame; Also includes: The second roller is raised and lowered above the first roller, and the outer sides of the first roller, the second roller and the third roller are slidably sleeved. A fixed frame is slidably connected between a first roller and a third roller. The inner side of the fixed frame is provided with a liftable mounting frame, and the inner side of the mounting frame is rotatably mounted with a drive wheel for pushing the steel plate. The outer side of the drive wheel is attached with an anti-slip buffer pad. The welding tank is located in the middle of the inner side of the frame. Lifting frames are symmetrically installed on the front and rear sides of the welding tank. A robotic arm for fixing the welding gun is provided on the inner side of the lifting frame. A dust collection component is provided at the bottom of the welding tank.

[0006] Furthermore: the frame has symmetrical first mounting slots at both ends, and two first rollers are rolled inside the first mounting slots. The first rollers and the second rollers are arranged in a triangle. A telescopic rod is provided on the outer side of the end of the first roller, and a mounting seat for rolling the second roller is fixed at the top of the telescopic rod.

[0007] Furthermore, damping pads are symmetrically embedded and installed on the inner end of the sliding sleeve, and three sets of damping pads are provided on the outer sides of the first roller, the second roller and the third roller.

[0008] Furthermore: the bottom end of the fixed frame is connected to a first adjusting rod rotatably connected inside the frame, the threads at both ends of the first adjusting rod are screwed in opposite directions, a second adjusting rod is rotatably mounted on the inner side of the fixed frame, and the top end of the second adjusting rod is connected to a first motor, and the outer side of the second adjusting rod is connected to an adjusting seat that slides up and down on the inner side of the fixed frame.

[0009] Furthermore: the back of the mounting bracket is symmetrically provided with limiting rods, the mounting bracket is slidably connected to the outside of the adjusting seat through the limiting rods, the outside of the limiting rods is fitted with a buffer spring located between the adjusting seat and the mounting bracket, and the top of the limiting rods is connected with a fixing nut.

[0010] Furthermore, the drive wheel has an I-shaped side cross-section, and a second motor is fixed to the top of the mounting frame at the top of the drive wheel.

[0011] Furthermore: the robotic arm includes a fixed base fixed to the outer side of the sliding end of the lifting frame surface, a connecting seat rotatably mounted on the outer side of the fixed base, an adjusting arm rotatably connected to the top of the connecting seat, a connecting joint rotatably provided at the top of the adjusting arm, a telescopic adjusting arm connected to the outer side of the connecting joint, and an assembly head for fixing the welding gun rotatably mounted at the top of the adjusting arm.

[0012] Furthermore: the dust collection assembly includes collection box shells disposed on both sides of the bottom of the welding tank, the collection box shells being fixedly installed on the inner bottom of the frame, the inner side of the collection box shells being integrally provided with an air inlet plate communicating with the bottom of the welding tank, and the inner bottom surface of the collection box shells being fixed with a support rod for support.

[0013] Furthermore: the air intake plate is obliquely arranged at the bottom of the welding groove, and the air intake plate has a hollow mesh structure.

[0014] Furthermore, a dustproof plate is provided protruding inward from the middle of the inner side of the collection box shell, and a purification fan is connected to the outer side of the dustproof plate.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: the steel structure welding device for building engineering can maintain the stable transport of the steel structure and its fixing structure after splicing and fixing different steel structures, and can stably weld and ensure welding quality. 1. This scheme is equipped with a first roller, a telescopic rod, a second roller, and a third roller. The triangular structure formed between the first roller and the second roller, and the lifting of the second roller, facilitate the downward pressure and limiting of the steel structure. The support of the first roller and the third roller facilitates the smooth transport of the steel structure. Meanwhile, sliding sleeves are slidably installed on the outer sides of the first, second, and third rollers. By adjusting the position of the sliding sleeves and making contact with different positions of the steel structure, it is convenient to limit the conveying of different steel structures. 2. This solution includes a welding groove, a second adjusting rod, and a drive wheel. The position and height of the mounting frame can be adjusted by rotating the welding groove and the second adjusting rod. This allows the drive wheel to press against the outer surface of the steel structure through the anti-slip buffer pad and to transport the steel structure by rolling. Meanwhile, the drive wheel has an I-shaped structure, and through its special structure with a concave middle and convex sides, it is easy to fit and transport different steel structures such as H-beams and I-beams. 3. This solution includes a lifting frame and a robotic arm. The lifting frame is symmetrically arranged on both sides of the welding groove, and the robotic arm is positioned on both sides of the steel structure welding position. The welding groove is recessed downwards, which allows the device to perform welding on both sides simultaneously and to easily perform ground welding operations without the need to reverse the steel structure, thus ensuring the accuracy and quality of the welding. 4. This solution includes a collection box shell, an air inlet plate, a dustproof plate, and a purification fan. By starting the purification fan, the perforated structure of the dustproof plate and the air inlet plate can adsorb impurities in the flue gas, allowing the impurities to be discharged directly downwards, reducing dispersion and ensuring a healthy working environment. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the front cross-section of the present invention; Figure 3 This is an exploded view of the first and second rollers of the present invention; Figure 4 This is a schematic diagram of the overall installation structure of the fixing frame of the present invention; Figure 5 This is a schematic diagram of the side cross-sectional structure of the drive wheel of the present invention; Figure 6 This is a schematic diagram of the robotic arm structure of the present invention; Figure 7 This is a schematic diagram of the arrangement structure of the dust collection component of the present invention.

[0017] In the diagram: 1. Frame; 2. First mounting slot; 3. First roller; 4. Second mounting slot; 5. Telescopic rod; 6. Mounting seat; 7. Second roller; 8. Sliding sleeve; 9. Damping pad; 10. Third roller; 11. Welding slot; 12. Fixing frame; 13. First adjusting rod; 14. Second adjusting rod; 15. First motor; 16. Adjusting seat; 17. Mounting frame; 18. Drive wheel; 19. Second motor; 20. Anti-slip buffer pad; 21. Limiting rod; 22. Buffer spring; 23. Fixing nut; 24. Lifting frame; 25. Fixed base; 26. Connecting seat; 27. Adjusting boom; 28. Connecting joint; 29. ​​Adjusting forearm; 30. Assembly head; 31. Collection box shell; 32. Support rod; 33. Air inlet plate; 34. Dustproof plate; 35. Purification fan; 36. Empty slot. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] In order to solve the technical problem that the welding equipment cannot smoothly transport the fixed limiting device when welding different steel structures, which is not conducive to maintaining the stability of the connection and affects the welding quality; Please see Figures 1-7 The present invention provides the following technical solution: A steel structure welding device for building engineering includes: a frame 1, a first mounting groove 2, a first roller 3, a second mounting groove 4, a telescopic rod 5, a mounting seat 6, a second roller 7, a sliding sleeve 8, a damping pad 9, a third roller 10, a welding groove 11, a fixing frame 12, a first adjusting rod 13, a second adjusting rod 14, a first motor 15, an adjusting seat 16, a mounting frame 17, a drive wheel 18, a second motor 19, an anti-slip buffer pad 20, a limit rod 21, a buffer spring 22, a fixing nut 23, a lifting frame 24, a fixing base 25, a connecting seat 26, an adjusting boom 27, a connecting joint 28, an adjusting forearm 29, an assembly head 30, a collection box shell 31, a support rod 32, an air inlet plate 33, a dustproof plate 34, a purification fan 35, and a placement slot 36. Among them: such as Figure 1 , Figure 2 and Figure 3In the machine frame 1, the top surface is provided with a first roller 3 and a third roller 10 for assisting in pushing the steel plate. A welding gun is provided in the middle of the machine frame 1. The two ends of the machine frame 1 are symmetrically provided with first mounting grooves 2. Two first rollers 3 are rolled inside the first mounting grooves 2. The first rollers 3 and the second rollers 7 are arranged in a triangle. A telescopic rod 5 is provided on the outer side of the end of the first roller 3. The top of the telescopic rod 5 is fixed with a mounting seat 6 for rolling the second roller 7. The second roller 7 is raised and lowered above the first roller 3 by the telescopic rod 5. The two ends of the machine frame 1 are provided with placement slots 36 for placing the welding joint limiting and fixing structure. In specific application scenarios, a second mounting groove 4 and a first mounting groove 2 are symmetrically opened from the middle of the frame 1 to both sides. They are used to roll and install the third roller 10 and the first roller 3, respectively. The first roller 3 and the third roller 10 can support the steel structure placed above the frame 1, and the rolling of the first roller 3 and the third roller 10 can assist in the conveying of the steel structure. At the same time, a second roller 7 is set above the first roller 3 to form a triangular structure with it. By raising and lowering the second roller 7, the second roller 7 and the first roller 3 can clamp the steel structure. The triangular structure can prevent the steel structure from deflecting and changing its angle, thus avoiding affecting the welding quality. The above technical solution ensures stable transport of the steel structure while clamping it smoothly, preventing angle changes and guaranteeing welding accuracy and quality.

[0020] Among them: such as Figure 2 and Figure 3 In the middle, the outer sides of the first roller 3, the second roller 7 and the third roller 10 are provided with sliding sleeves 8, and the inner ends of the sliding sleeves 8 are symmetrically embedded with damping pads 9. The sliding sleeves 8 are provided with 3 or more sets on the outer sides of the first roller 3, the second roller 7 and the third roller 10. In specific application scenarios, by setting multiple sets of sliding sleeves 8 on the first roller 3, the second roller 7, and the third roller 10, and utilizing the protruding structure on the outer side of the first roller 3, the second roller 7, and the third roller 10, the first roller 3, the second roller 7, and the third roller 10 can contact the steel structure through the sliding sleeves 8. This can adapt to different needs. For example, when there are protrusions on the surface of the steel structure or protruding fixing structures at the welded joints of the steel structure, it can avoid contact between the fixing structure and the first roller 3, the second roller 7, and the third roller 10, which would affect the fixing effect and is conducive to stable welding. The above technical solution enables the conveying of different types of steel structures and fixed steel structure components, ensuring stability and avoiding any impact on welding quality.

[0021] Among them: such as Figure 1 , Figure 2 , Figure 4 and Figure 5 In the middle, the fixed frame 12 is slidably connected between the first roller 3 and the third roller 10. The bottom end of the fixed frame 12 is connected to the first adjusting rod 13, which is rotatably connected inside the frame 1. The threads at both ends of the first adjusting rod 13 are screwed in opposite directions. The inner side of the fixed frame 12 is rotatably mounted with the second adjusting rod 14, and the top end of the second adjusting rod 14 is connected to the first motor 15. The outer side of the second adjusting rod 14 is connected to the adjusting seat 16, which slides up and down on the inner side of the fixed frame 12. The inner side of the fixed frame 12 is provided with the mounting frame 17 connected to the outer side of the adjusting seat 16. The inner side of the mounting frame 17 is rotatably mounted with the drive wheel 18 for pushing the steel plate. The side cross-section of the drive wheel 18 is in the shape of an "I". The top end of the drive wheel 18 is connected to the second motor 19, which is fixed to the top end of the mounting frame 17. The outer side of the drive wheel 18 is attached with an anti-slip buffer pad 20. In specific application scenarios, the front and rear positions of the fixing frame 12 are adjusted by rotating the first adjusting rod 13, and the up and down positions of the adjusting seat 16 are adjusted by rotating the second adjusting rod 14, thereby adjusting the position of the mounting frame 17 so that the drive wheel 18 is in contact with the steel structure. At the same time, the drive wheel 18 has an I-shaped structure. Through the middle concave and the two sides protruding, it can maintain contact with different steel structures, such as angle steel, H-beam steel, and I-beam steel, so that it can be stably clamped and rolled for conveying. Furthermore, the outer side of the drive wheel 18 is attached with an anti-slip buffer pad 20, which not only prevents slipping, but also reduces the vibration of the steel structure and ensures the stability of the weld by indenting the anti-slip buffer pad 20 when it encounters impurities and protrusions on the surface of the steel structure. The above technical solution facilitates stable clamping and transport of different steel structures, avoiding deviations and vibrations that could affect welding quality.

[0022] Among them: such as Figure 4 and Figure 5 In the middle, the back of the mounting bracket 17 is symmetrically provided with a limiting rod 21. The mounting bracket 17 is slidably connected to the outside of the adjusting seat 16 through the limiting rod 21. A buffer spring 22 located between the adjusting seat 16 and the mounting bracket 17 is sleeved on the outside of the limiting rod 21, and a fixing nut 23 is connected to the top of the limiting rod 21. In specific application scenarios, the mounting bracket 17 is connected to the adjusting seat 16 through the buffer spring 22, which can provide buffering. The amount of buffering can be adjusted by screwing in the fixing nut 23, and the elastic force of the buffer spring 22 can be applied to ensure that the drive wheel 18 can be used to smoothly transport the steel structure through the anti-slip buffer pad 20. The above technical solution can further ensure the stable transportation of steel structures, avoid vibration of steel structures, and maintain welding accuracy.

[0023] Among them: such as Figure 1, Figure 2 and Figure 6 In the middle of the inner side of the frame 1, the welding groove 11 is opened. The front and rear sides of the welding groove 11 are symmetrically equipped with lifting frames 24. The inner side of the lifting frame 24 is provided with a mechanical arm for fixing the welding gun. The mechanical arm includes a fixed base 25 fixed on the outer side of the sliding end of the surface of the lifting frame 24. A connecting seat 26 is rotatably installed on the outer side of the fixed base 25. An adjusting arm 27 is rotatably connected to the top of the connecting seat 26. A connecting joint 28 is rotatably provided at the top of the adjusting arm 27. A telescopic adjusting arm 29 is connected to the outer side of the connecting joint 28. An assembly head 30 for fixing the welding gun is rotatably installed at the top of the adjusting arm 29. In specific application scenarios, the lifting frame 24 is used to make it easy to adjust the height of the robotic arm to adjust the range of motion of the welding torch. At the same time, the movable connection between the fixed base 25, the connecting seat 26, the adjusting upper arm 27, the connecting joint 28, the adjusting lower arm 29 and the assembly head 30 makes it easy to automatically adjust the welding position so as to make it easy to weld on the outside of the steel structure. By adopting the above technical solution, there is no need to flip or re-weld the steel structure, which can achieve one-time welding, reduce workpiece movement, and improve welding efficiency.

[0024] Among them: such as Figure 1 , Figure 2 and Figure 7 In the process, a dust collection component is provided at the bottom of the welding tank 11. The dust collection component includes a collection box shell 31 provided on both sides of the bottom of the welding tank 11. The collection box shell 31 is fixedly installed on the inner bottom of the frame 1. An air inlet plate 33 communicating with the bottom of the welding tank 11 is integrally provided on the inner side of the collection box shell 31. A support rod 32 for support is fixed on the inner bottom surface of the collection box shell 31. The air inlet plate 33 is obliquely arranged at the bottom of the welding tank 11. The air inlet plate 33 has a hollow mesh structure. A dustproof plate 34 is provided inwardly protruding from the middle of the inner side of the collection box shell 31. A purification fan 35 is connected to the outer side of the dustproof plate 34. In specific application scenarios, by starting the purification fan 35, the dustproof plate 34 and the air inlet plate 33 can directly use wind power to adsorb impurities in the flue gas, causing the impurities to descend and reducing their dispersion. In addition, the air inlet plate 33 is set at an angle, which facilitates the entry of impurities. The above technical solution helps maintain a healthy welding environment, ensures safe operation, reduces the impact of impurities, and improves welding accuracy.

[0025] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention; the contents not described in detail in this specification belong to the prior art known to those skilled in the art; in addition, the directional terms such as up, down, left, right, front, and back in the text only represent their relative positions and not absolute positions.

[0026] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding device for steel structures in building construction, comprising: A frame (1) is provided with a first roller (3) and a third roller (10) on its top surface for assisting in pushing the steel plate, and a welding gun is provided in the middle of the frame (1). Its characteristic is that it further includes: The second roller (7) is raised and lowered above the first roller (3), and the outer sides of the first roller (3), the second roller (7) and the third roller (10) are slidably fitted with sliding sleeves (8). A fixed frame (12) is slidably connected between the first roller (3) and the third roller (10). A liftable mounting frame (17) is provided on the inner side of the fixed frame (12), and a drive wheel (18) for pushing the steel plate is rotatably mounted on the inner side of the mounting frame (17). An anti-slip buffer pad (20) is attached to the outer side of the drive wheel (18). Welding tank (11) is located in the middle of the inner side of the frame (1). Lifting frame (24) is symmetrically installed on the front and rear sides of the welding tank (11). A mechanical arm for fixing the welding gun is provided on the inner side of the lifting frame (24). A dust collection component is provided at the bottom of the welding tank (11).

2. The steel structure welding device for building engineering according to claim 1, characterized in that: The frame (1) has symmetrical first mounting slots (2) at both ends, and two first rollers (3) are rolled inside the first mounting slots (2). The first rollers (3) and the second rollers (7) are arranged in a triangular pattern. A telescopic rod (5) is provided on the outer side of the end of the first roller (3), and a mounting seat (6) for rolling the second roller (7) is fixed at the top of the telescopic rod (5).

3. The steel structure welding device for building engineering according to claim 1, characterized in that: The inner end of the sliding sleeve (8) is symmetrically fitted with damping pads (9), and the sliding sleeve (8) is provided with 3 sets on the outer sides of the first roller (3), the second roller (7) and the third roller (10).

4. The steel structure welding device for building engineering according to claim 1, characterized in that: The bottom end of the fixed frame (12) is connected to a first adjusting rod (13) which is rotatably connected inside the frame (1). The threads at both ends of the first adjusting rod (13) are screwed in opposite directions. A second adjusting rod (14) is rotatably installed on the inner side of the fixed frame (12), and a first motor (15) is connected to the top end of the second adjusting rod (14). An adjusting seat (16) that slides up and down on the inner side of the fixed frame (12) is connected to the outer side of the second adjusting rod (14).

5. The steel structure welding device for building engineering according to claim 4, characterized in that: The mounting bracket (17) has symmetrically protruding limit rods (21) on its back side. The mounting bracket (17) is slidably connected to the outside of the adjusting seat (16) via the limit rods (21). A buffer spring (22) is sleeved on the outside of the limit rods (21) between the adjusting seat (16) and the mounting bracket (17). A fixing nut (23) is connected to the top of the limit rods (21).

6. The steel structure welding device for building engineering according to claim 5, characterized in that: The drive wheel (18) has an "I" shaped cross-section and a second motor (19) fixed to the top of the mounting bracket (17) is connected to the top of the drive wheel (18).

7. The steel structure welding device for building engineering according to claim 1, characterized in that: The robotic arm includes a fixed base (25) fixed to the outside of the sliding end of the lifting frame (24). A connecting seat (26) is rotatably mounted on the outside of the fixed base (25). An adjusting arm (27) is rotatably connected to the top of the connecting seat (26). A connecting joint (28) is rotatably provided at the top of the adjusting arm (27). A telescopic adjusting arm (29) is connected to the outside of the connecting joint (28). An assembly head (30) for fixing the welding gun is rotatably mounted at the top of the adjusting arm (29).

8. The steel structure welding device for building engineering according to claim 1, characterized in that: The dust collection assembly includes a collection box shell (31) disposed on both sides of the bottom of the welding groove (11). The collection box shell (31) is fixedly installed on the inner bottom of the frame (1). An air inlet plate (33) communicating with the bottom of the welding groove (11) is integrally disposed on the inner side of the collection box shell (31). A support rod (32) for support is fixed on the inner bottom surface of the collection box shell (31).

9. A steel structure welding device for building engineering according to claim 8, characterized in that: The air intake plate (33) is obliquely arranged at the bottom of the welding groove (11), and the air intake plate (33) has a hollow mesh structure.

10. A steel structure welding device for building engineering according to claim 8, characterized in that: A dustproof plate (34) is provided inwardly at the middle of the inner side of the collection box shell (31), and a purification fan (35) is connected to the outer side of the dustproof plate (34).

Images