Bridge steel box girder welding device capable of avoiding smoke pollution

Abstract

The utility model discloses a bridge steel box girder welding device capable of avoiding flue gas pollution, and relates to the technical field of bridge steel box girder welding, the bridge steel box girder welding device comprises a tool plate, base plates, a welding machine and a negative pressure pump, the base plates are fixed above the tool plate at equal intervals, and balls are installed at the top ends of the base plates at equal intervals; clamping structures are fixed to the front side and the rear side of the tool plate correspondingly, a base is arranged on the inner sides of the clamping structures, an electric telescopic rod is fixed to the upper surface of the base, a top plate is fixed to the output end of the electric telescopic rod, a T-shaped rod is arranged on the inner side of the top plate, and guide wheels are installed at the left end and the right end of the T-shaped rod correspondingly. A welding machine is fixed to the lower portion of the T-shaped rod, a discharging pipe and a welding wire are arranged below the welding machine, and a filtering box is fixed to the front side face of the welding machine. According to the bridge steel box girder welding device capable of avoiding smoke pollution, a bridge steel box girder workpiece can be stably fixed, and the outer end of a welding seam can be conveniently treated.

Description

Technical Field

[0001] This utility model relates to the field of bridge steel box girder welding technology, specifically a bridge steel box girder welding device that avoids flue gas pollution. Background Technology

[0002] Steel box girders are generally used on bridges with large spans. During processing and production, the various plates of the steel box girder are assembled and welded using a welding device. A filter structure for fume treatment is set up inside the welding device to prevent harmful gases from flowing out and polluting the environment.

[0003] For example, Chinese invention patent CN116944636B discloses a bridge steel box girder assembly and welding device, which relates to the field of welding technology. The welding device includes a tooling plate, a control box installed in the middle of the upper part of the tooling plate, and several pads installed on both sides of the control box above the tooling plate. The control box is connected to the welding machine through hydraulic pipelines and wires. The top plate is placed on the pads. A ceramic liner is placed under the gap between the two top plates on the control box. After two CO2 gas shielded welding passes for the root pass, the welding machine is placed on the two top plates. The welding machine performs multi-pass submerged arc welding to fill and cover the weld in layers. After welding the weld, the welding machine uses negative pressure to extract the welding fumes and flux generated during welding, allowing the flux to enter the welding machine, eliminating the need for subsequent manual cleaning. At the same time, the collected fumes are centrally treated to avoid fumes polluting the working environment and affecting the workers' work.

[0004] Based on existing solutions and actual production and processing applications, the existing bridge steel box girder welding devices that avoid fume pollution have a guide wheel housing located at the weld seam of the workpiece, moving along the weld seam. When it is necessary to process the end of the weld seam, the guide wheel is located on the outer end of the weld seam. Due to the influence of the guide wheel, it is inconvenient for the welding machine to process the outer end of the weld seam of the bridge steel box girder workpiece. Therefore, we propose a bridge steel box girder welding device that avoids fume pollution in order to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a bridge steel box girder welding device that avoids flue gas pollution, so as to solve the problem of the existing bridge steel box girder welding devices that avoid flue gas pollution mentioned in the background art. The wheel shell inside the guide wheel is located at the weld seam of the workpiece and moves along the weld seam. When it is necessary to process the end of the weld seam, the guide wheel is located on the outer end of the weld seam. Due to the influence of the guide wheel, it is inconvenient for the welding machine to process the outer end of the weld seam of the bridge steel box girder workpiece.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a bridge steel box girder welding device that avoids flue gas pollution, comprising a tooling plate, a backing plate, a welding machine, and a negative pressure pump:

[0007] The tooling plate is fixed with pads at equal intervals on its upper part, and the top of the pads is installed with balls at equal intervals. The tooling plate is fixed with clamping structures on both its front and rear sides.

[0008] The clamping structure has a base on its inner side, an electric telescopic rod is fixed on the upper surface of the base, and a top plate is fixed on the output end of the electric telescopic rod. A T-shaped rod is provided on the inner side of the top plate, and guide wheels are installed on both the left and right ends of the T-shaped rod. A welding machine is fixed below the T-shaped rod, and a feeding pipe and welding wire are provided below the welding machine. A filter box is fixed on the front side of the welding machine, and a negative pressure pump is installed on the right side of the filter box. A conveying pipe is fixed on the left end of the filter box. A ceramic gasket is installed in the middle of the tooling plate.

[0009] Preferably, the ball is rotatably connected to the pad, and the center of the ball is located below the upper surface of the pad.

[0010] Preferably, the clamping structure includes a vertical plate, a mounting frame, a screw, a movable plate, and a positioning plate. The mounting frame is fixed to the upper surface of the vertical plate, and the screw is rotatably mounted inside the mounting frame. The movable plate is threaded to the outer end of the screw, and a positioning plate is provided below the movable plate. The positioning plate is fixed on the mounting frame.

[0011] Preferably, the outer end of the movable plate is slidably mounted inside the mounting bracket.

[0012] Preferably, the upper surface of the positioning plate is flush with the upper surface of the ball.

[0013] Preferably, the bottom end of the guide wheel is located in the groove at the top of the top plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the bridge steel box girder welding device that avoids smoke pollution can stably fix the bridge steel box girder workpiece and facilitate the treatment of the outer end of the weld.

[0015] 1. The clamping structure consisting of a vertical plate, mounting frame, screw, moving plate and positioning plate can stably constrain the bridge steel box girder workpiece. By rotating the screw, the moving plate moves downward, and the upper and lower sides of the bridge steel box girder workpiece are respectively in contact with the upper surface of the positioning plate and the lower surface of the moving plate.

[0016] 2. The guide wheel T-shaped rod and welding machine are used to move back and forth between the top plates, which makes it easy to move the welding machine to the outer end of the weld and facilitates the treatment of the outer end of the weld. During the welding process, the exhaust gas is treated through the filter box, negative pressure pump and delivery pipe to avoid flue gas pollution.

[0017] 3. An electric telescopic rod is fixed to the upper surface of the base, and a top plate is fixed to the output end of the electric telescopic rod. Under the action of the electric telescopic rod, the top plate, T-shaped rod and welding machine are raised and lowered to adjust the working height of the welding machine, which facilitates the processing of welding surfaces at different height positions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first axial side structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the clamping structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the axial section structure of this utility model;

[0021] Figure 4 This is a bottom view of the welding machine of this utility model.

[0022] Figure 5 This is a cross-sectional view of the filter box of this utility model;

[0023] Figure 6 This is a schematic diagram of the second axial side structure of the present invention.

[0024] In the diagram: 1. Tooling plate; 2. Pad plate; 3. Ball bearing; 4. Vertical plate; 5. Mounting bracket; 6. Screw; 7. Moving plate; 8. Positioning plate; 9. Base; 10. Electric telescopic rod; 11. Top plate; 12. T-shaped rod; 13. Guide wheel; 14. Welding machine; 15. Welding wire; 16. Feeding pipe; 17. Filter box; 18. Negative pressure pump; 19. Conveying pipe; 20. Ceramic gasket. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-6 In existing bridge steel box girder welding devices designed to avoid flue gas pollution, when the weld end needs to be processed, the guide wheel 13 is located on the outer end of the weld. Due to the influence of the guide wheel 13, it is inconvenient for the welding machine 14 to process the outer end of the weld of the bridge steel box girder workpiece. In order to solve this technical problem, this embodiment discloses the following technical content.

[0027] A bridge steel box girder welding device for avoiding flue gas pollution includes a tooling plate 1, a pad plate 2, ball bearings 3, a vertical plate 4, a mounting frame 5, a screw 6, a moving plate 7, a positioning plate 8, a base 9, an electric telescopic rod 10, a top plate 11, a T-shaped rod 12, a guide wheel 13, a welding machine 14, welding wire 15, a feeding pipe 16, a filter box 17, a negative pressure pump 18, a conveying pipe 19, and a ceramic liner 20;

[0028] The bridge steel box girder workpiece is placed on top of the pad 2. The pad 2 is fixed at equal intervals on the top of the tooling plate 1, and the top of the pad 2 is installed with equal intervals of the ball bearings 3. The ball bearings 3 are rotatably connected to the pad 2, and the center of the ball bearings 3 is located below the upper surface of the pad 2. The rolling of the ball bearings 3 facilitates the movement of the bridge steel box girder workpiece, so that the welds formed by the bevels of the two sets of bridge steel box girder workpieces are aligned.

[0029] The clamping structure includes a vertical plate 4, a mounting frame 5, a screw 6, a movable plate 7, and a positioning plate 8. The mounting frame 5 is fixed on the upper surface of the vertical plate 4, and the screw 6 is rotatably mounted inside the mounting frame 5. The movable plate 7 is threadedly connected to the outer end of the screw 6, and a positioning plate 8 is provided below the movable plate 7. The bottom end of the screw 6 is rotatably mounted on the positioning plate 8, and the positioning plate 8 is fixed on the mounting frame 5. The outer end of the movable plate 7 is slidably mounted inside the mounting frame 5, and the upper surface of the positioning plate 8 is flush with the upper surface of the ball 3.

[0030] At this time, the lower surface of the bridge steel box girder workpiece is flush with the upper surface of the positioning plate 8 inside the clamping structure. Then, the screw 6 is manually rotated, and the moving plate 7, which is threadedly connected to the screw 6, moves downward. The bridge steel box girder workpiece is clamped by the moving plate 7 and the positioning plate 8, thus stably limiting the bridge steel box girder workpiece.

[0031] A base 9 is provided on the inner side of the clamping structure. An electric telescopic rod 10 is fixed on the upper surface of the base 9. A top plate 11 is fixed at the output end of the electric telescopic rod 10. A T-shaped rod 12 is provided on the inner side of the top plate 11. Guide wheels 13 are installed on both the left and right ends of the T-shaped rod 12. A welding machine 14 is fixed below the T-shaped rod 12. A feeding pipe 16 and welding wire 15 are provided below the welding machine 14. A filter box 17 is fixed on the front side of the welding machine 14. A negative pressure pump 18 is installed on the right side of the filter box 17. A conveying pipe 19 is fixed on the left end of the filter box 17. A ceramic liner 20 is installed in the middle of the tooling plate 1.

[0032] The weld is located on the ceramic backing 20. After two CO2 gas shielded welding passes, the welding machine 14 performs the welding work. The flux flows into the weld through the feed pipe 16. An electrode ring is fitted on the outside of the welding wire 15. The electrode ring is connected to the electrode of the power module and the welding wire 15 is connected to the circuit. The welding wire 15 welds the weld through the flux. The guide wheel 13 slides in the groove of the top plate 11. The movement of the guide wheel 13 guides the welding machine 14 to move back and forth. The electric telescopic rod 10 adjusts the height of the welding machine 14. The length of the top plate 11 is longer than the length of the bridge steel box girder workpiece. The base 9, electric telescopic rod 10, top plate 11, T-shaped rod 12, guide wheel 13, welding machine 14, welding wire 15 and feed pipe 16 are used to facilitate the welding of the end of the bridge steel box girder workpiece. The welding machine 14, welding wire 15 and feed pipe 16 can be stably stopped above the outer end of the bridge steel box girder workpiece.

[0033] During welding, the negative pressure pump 18 is started. Under the action of the negative pressure pump 18, the exhaust gas flows through the delivery pipe 19 to the filter box 17. The exhaust gas is filtered by the gas purification structure inside the filter box 17 to avoid exhaust gas pollution to the environment.

[0034] The above completes a series of operations for the bridge steel box girder welding device that avoids smoke pollution. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0035] All standard parts used in this utility model 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.

[0036] 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 bridge steel box girder welding device for avoiding flue gas pollution, comprising a tooling plate (1), a backing plate (2), a welding machine (14), and a negative pressure pump (18), characterized in that: The tooling plate (1) is fixed with pads (2) at equal intervals on the top, and the top of the pads (2) is installed with balls (3) at equal intervals. The tooling plate (1) is fixed with clamping structures on both the front and rear sides. The clamping structure is provided with a base (9) on its inner side. An electric telescopic rod (10) is fixed on the upper surface of the base (9). A top plate (11) is fixed at the output end of the electric telescopic rod (10). A T-shaped rod (12) is provided on the inner side of the top plate (11). Guide wheels (13) are installed on both the left and right ends of the T-shaped rod (12). A welding machine (14) is fixed below the T-shaped rod (12). A feeding pipe (16) and welding wire (15) are provided below the welding machine (14). A filter box (17) is fixed on the front side of the welding machine (14). A negative pressure pump (18) is installed on the right side of the filter box (17). A conveying pipe (19) is fixed on the left end of the filter box (17). A ceramic liner (20) is installed in the middle of the tooling plate (1).

2. The bridge steel box girder welding device for avoiding flue gas pollution according to claim 1, characterized in that: The ball (3) is rotatably connected to the pad (2), and the center of the ball (3) is located below the upper surface of the pad (2).

3. The bridge steel box girder welding device for avoiding flue gas pollution according to claim 1, characterized in that: The clamping structure includes a vertical plate (4), a mounting frame (5), a screw (6), a movable plate (7), and a positioning plate (8). The mounting frame (5) is fixed on the upper surface of the vertical plate (4), and the screw (6) is rotatably mounted inside the mounting frame (5). The movable plate (7) is threaded to the outer end of the screw (6), and the positioning plate (8) is provided below the movable plate (7). The positioning plate (8) is fixed on the mounting frame (5).

4. The bridge steel box girder welding device for avoiding flue gas pollution according to claim 3, characterized in that: The outer end of the movable plate (7) is slidably mounted inside the mounting bracket (5).

5. A bridge steel box girder welding device for avoiding flue gas pollution according to claim 3, characterized in that: The upper surface of the positioning plate (8) is flush with the upper surface of the ball (3).

6. The bridge steel box girder welding device for avoiding flue gas pollution according to claim 1, characterized in that: The bottom end of the guide wheel (13) is located in the groove at the top of the top plate (11).

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