Automatic welding system for bridge steel structure

Abstract

The invention relates to the technical field of bridge steel structure welding, in particular to an automatic welding system for a bridge steel structure, which comprises a welding table and two material fixing tables, the two material fixing tables are fixedly mounted on the upper surface of the welding table, and a main ring is fixed on the upper surface of the welding table and located between the two material fixing tables; the right end of the main ring is coaxially and rotationally sleeved with an installation ring, a threaded shaft slidably penetrates through the outer ring face of the installation ring, a bent connecting rod is fixed to the end, located on the inner ring side of the installation ring, of the threaded shaft, a welding structure is installed at the other end of the bent connecting rod, and the end, located on the outer side of the installation ring, of the threaded shaft is sleeved with a clamping wheel in a threaded mode. The welding structure can be driven to conduct welding treatment around multiple positions of the steel structures, the connectivity between the steel structures is improved, then when the long arc-shaped bevel gear ring is controlled to be tangent to the inner cavity bevel gear, the cleaning soft wheel pair synchronously cleans welded joints after welding, and welding point stress exists on the other sides of the steel structures during cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge steel structure welding, and particularly to an automatic welding system for bridge steel structures. Background Art

[0002] A bridge generally refers to a structure erected over rivers, lakes and seas to enable vehicles, pedestrians, etc. to pass smoothly. Among them, the proportion of steel bridges is very large. A steel bridge is a bridge whose main load-bearing structure uses steel, that is, a steel structure bridge or a steel bridge. Assembled steel bridges have been widely used all over the world. At present, with the development of China's railway construction towards high speed and heavy load, railway steel bridges are also developing towards high speed, heavy load, large span, beautiful and novel structure and full welding, and welding devices play a very important role in bridge construction.

[0003] Chinese Patent CN115156786A discloses a steel structure on-site welding device for bridge construction, including a base, a fixing plate and a vertical plate fixedly installed on the base. A clamping mechanism for fixing steel pipes is arranged on the vertical plate; a hollow rod is fixed on the fixing plate, a working box is fixed on the hollow rod, an adjusting mechanism connected to the working box is arranged on the fixing plate, a plurality of groups of sliding grooves arranged at equal circumferential intervals are formed on the working box, a sliding block connected to the adjusting mechanism is slidably installed in the sliding groove, a clamping plate is fixed on the sliding block, and the adjusting mechanism drives the clamping plate to move through the sliding block; a transverse moving mechanism is arranged between the fixing plate and the vertical plate, a driving mechanism connected to the transverse moving mechanism is arranged on the base, and a welding torch for welding is fixed on the driving mechanism. The driving mechanism drives the welding torch to make a circular motion. The above related technologies have the following defects: In the welding of steel structures, slag removal treatment is required at the weld position. In the prior art, continuous welding treatment is carried out around the joints of two fixed steel structures during welding, and the cleaning structure will clean the welding slag synchronously with the welding structure. When the cleaning structure is cleaning, pressure will be exerted on the steel structure, and the un-welded steel structure on one side is prone to deformation. Therefore, an automatic welding system for bridge steel structures is proposed. Summary of the Invention

[0004] In order to prevent the un-welded part on the other side of the steel structure from deforming when the cleaning structure is cleaning the welding slag, the present invention provides an automatic welding system for bridge steel structures.

[0005] An automatic welding system for bridge steel structures provided by the present invention adopts the following technical solution: It includes a welding table and two material fixing tables. Both of the two material fixing tables are fixedly installed on the upper surface of the welding table. A main ring is fixed on the upper surface of the welding table and between the two material fixing tables. An installation ring is coaxially rotatably sleeved on the right end of the main ring. A threaded shaft slidably penetrates through the outer ring surface of the installation ring. One end of the threaded shaft located on the inner ring side of the installation ring is fixed with a bent connecting rod. The other end of the bent connecting rod is installed with a welding structure. One end of the threaded shaft located outside the installation ring is threadedly sleeved with a clamping wheel. An inner cavity bevel gear is rotatably sleeved on the outer surface of the clamping wheel. The clamping wheel is elastically connected to the outer ring surface of the installation ring. The inner ring surface of the inner cavity bevel gear and the outer ring surface of the clamping wheel are dampedly connected through a damping structure. A bent elastic telescopic rod is fixed on the inner ring surface of the installation ring and behind the welding structure. The other end of the bent elastic telescopic rod rotatably penetrates through an outer edge shaft. One end of the outer edge shaft close to the axis of the installation ring is elastically slidably sleeved with a sleeve shaft. One end of the sleeve shaft close to the axis of the installation ring is fixed with a cleaning soft wheel. A bent inserting rod is rotatably sleeved on the outer surface of the outer edge shaft. One end of the bent inserting rod away from the axis of the installation ring slidably penetrates through an anti-twist rod. The bent elastic telescopic rod is fixed to the anti-twist rod. A jack is opened at a position corresponding to the bent inserting rod on the bent connecting rod.

[0006] One end of the outer edge shaft away from the axis of the installation ring is installed with an elastic transmission structure. The other end of the elastic transmission structure is installed with a driven bevel gear. The driven bevel gear is rotatably connected to the installation ring. The elastic transmission structure is connected to the installation ring. A stress short rod is fixed at one end of the bent elastic telescopic rod close to the installation ring. An inclined strip push plate is arranged behind the stress short rod. The inclined strip push plate is elastically connected to the inner ring surface of the installation ring.

[0007] A ring-shaped telescopic structure is arranged on the right side of the installation ring. Multiple short arc bevel gear rings are fixed to the left telescopic end of the ring-shaped telescopic structure. A long arc bevel gear ring is arranged between every two adjacent short arc bevel gear rings. The long arc bevel gear ring is fixed to the right telescopic end of the ring-shaped telescopic structure. A concentric ring is fixed on the upper surface of the welding table and on the right side of the ring-shaped telescopic structure. A ring frame slidably penetrates through the right side surface of the concentric ring. The left end of the ring frame is fixed to the right telescopic end of the ring-shaped telescopic structure. A power telescopic rod is fixed on the upper surface of the concentric ring. The right end of the power telescopic rod is fixed to the ring frame. A driving bevel gear ring is arranged on the right side of the driven bevel gear. The driving bevel gear ring is fixed to the right telescopic end of the ring-shaped telescopic structure. A push ring is arranged on the right side of the inclined strip push plate. The push ring is fixed to the inner ring surface of the driving bevel gear ring.

[0008] Optionally, the damping structure includes a clamping strip. The outer circumferential side surface of the clamping wheel is a structure with multiple tooth grooves. The clamping strip is slidably inserted into one of the tooth groove structures of the clamping wheel. The clamping strip is elastically connected to the inner ring surface of the inner cavity bevel gear.

[0009] Optionally, the elastic transmission structure includes a tensioning wheel and a vertical shaft. The lower end of the vertical shaft is rotatably connected to the tensioning wheel. A transverse elastic telescopic rod is fixed to the upper end of the vertical shaft. The other end of the transverse elastic telescopic rod is fixed to the mounting ring. The lower end of the driven bevel gear and the upper end of the outer edge shaft are driven by a conveyor belt, and the conveyor belt is in sliding contact with the outer circumferential side surface of the tensioning wheel.

[0010] Optionally, a driving spur gear is engaged with the outer ring surface of the mounting ring, a power motor is fixed to the outer ring surface of the main ring, and the driving spur gear is fixed to the output end of the power motor.

[0011] Optionally, the outer end of the jack is of a reamed hole structure, the jack and the bent insertion rod are coaxially arranged, and the outer diameter of the bent insertion rod is equal to the inner diameter of the jack.

[0012] Optionally, the annular telescopic structure includes a left ring and a right ring. The left ring is located on the left side of the right ring. The left ring and the right ring are elastically connected. The left ring is connected to the short arc bevel gear ring. The right ring is connected to the long arc bevel gear ring. The right ring is fixed to the ring frame. The driving bevel gear ring is fixed to the left ring.

[0013] Optionally, a horizontal rod is fixed to the outer ring surface of the left ring. The right ring is slidably sleeved on the outer surface of the horizontal rod. The left ring and the right ring are coaxially arranged.

[0014] Optionally, a plurality of distance plates are fixed to the outer ring surface of the concentric ring. The left end of the distance plate is bent towards the axis of the concentric ring, and the bent end of the distance plate is located on the left side of the left ring.

[0015] Optionally, a force-bearing cover cylinder is coaxially and elastically slidably sleeved at the lower end of the welding structure, and a plurality of balls are rotatably embedded at the lower end of the force-bearing cover cylinder.

[0016] In summary, the present invention includes the following beneficial technical effects: In the present invention, by providing components such as a short arc-shaped bevel gear ring, a threaded shaft, and an inner cavity bevel gear, after the two steel structure welding ends are in contact and fixed, first control the short arc-shaped bevel gear ring to be tangent to the inner cavity bevel gear. When controlling the rotation of the mounting ring, when the inner cavity bevel gear meshes with the short arc-shaped bevel gear ring, drive the clamping wheel to rotate and mesh with the threaded shaft through the damping structure, push the bent connecting rod and the welding structure towards the steel structure at the axis of the mounting ring, so that the pushing welding structure contacts and welds with the steel structure. When the inner cavity bevel gear disengages from the short arc-shaped bevel gear ring, the welding structure disengages from the steel structure for short-distance welding treatment. At this time, the bent insertion rod disengages from the insertion hole, and the cleaning soft wheel does not clean the welding area. When the mounting ring drives the welding structure to rotate around the steel structure for one week, the inner cavity bevel gear can drive the welding structure to perform welding treatment at multiple places around the steel structure by meshing with multiple short arc-shaped bevel gear rings, increasing the connectivity between the steel structures. Then, when controlling the long arc-shaped bevel gear ring to be tangent to the inner cavity bevel gear, multiple long arc-shaped bevel gear rings and multiple short arc-shaped bevel gear rings form an annular structure. At the same time, the pushing ring pushes the inclined strip push plate to move leftward, drives the bent elastic telescopic rod to stretch through the pushing force receiving short rod, so that the bent insertion rod inserts into the insertion hole, and the cleaning soft wheel moves downward synchronously with the welding structure. When the welding structure welds the steel structure, the cleaning soft wheel synchronously cleans the weld after welding, and when cleaning, there is a welding point on the other side of the steel structure under stress.

[0017] In the present invention, by providing components such as a tensioning wheel, a vertical shaft, a driven bevel gear, and a driving bevel gear ring, when the bent elastic telescopic rod moves, the transverse elastic telescopic rod pushes the conveyor belt to be in a tensioned state through the vertical shaft and the tensioning wheel. When the long arc-shaped bevel gear ring is tangent to the inner cavity bevel gear, the driving bevel gear ring meshes with the driven bevel gear. Thus, when the mounting ring rotates, the driven bevel gear rotates by meshing with the driving bevel gear ring, and drives the outer edge shaft, the sleeve shaft, and the cleaning soft wheel to rotate through the conveyor belt drive. When the cleaning soft wheel rotates, the cleaning effect of the welding slag is increased.

[0018] In the present invention, by providing a clamping strip and a clamping wheel, the clamping strip is elastically connected to the inner cavity bevel gear and meshes with the tooth groove-like structure of the clamping wheel. When the inner cavity bevel gear meshes with the short arc-shaped bevel gear ring and the long arc-shaped bevel gear ring, the inner cavity bevel gear first drives the clamping wheel to rotate synchronously through the clamping strip, driving the welding structure close to the steel structure. When the welding structure cannot move further after contacting the steel structure, when the inner cavity bevel gear continues to rotate, the clamping strip continuously misaligns with the tooth groove-like structure of the clamping wheel by approaching the inner ring surface of the inner cavity bevel gear, so that during the continuous rotation of the inner cavity bevel gear, the welding structure can always contact and weld the steel structure.

[0019] In the present invention, by providing a force receiving cover cylinder and a roller, when the welding structure approaches the steel structure under the threaded shaft, the force receiving cover cylinder first contacts the steel structure to buffer the collision force when the welding structure contacts the steel structure. At the same time, when the force receiving cover cylinder rotates with the mounting ring, the roller contacts the steel structure to reduce the wear of the force receiving cover cylinder. Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram in the embodiment of the present invention; Figure 2 is the left view schematic diagram of a partial structure in the embodiment of the present invention; Figure 3 is the structural schematic diagram of the connection between the threaded shaft and the mounting ring in the embodiment of the present invention; Figure 4 is the structural schematic diagram of the distribution of the bent insertion rod and the insertion hole in the embodiment of the present invention; Figure 5 is the structural schematic diagram of the connection between the conveyor belt and the driven bevel gear in the embodiment of the present invention; Figure 6 is the front view schematic diagram of a partial structure in the embodiment of the present invention; Figure 7 is the structural schematic diagram of the connection between the left ring and the right ring in the embodiment of the present invention; Figure 8 is the partial upward view structural schematic diagram in the embodiment of the present invention.

[0021] Reference numerals: 1, welding table; 2, material fixing table; 3, mounting ring; 4, threaded shaft; 5, main ring; 6, bent connecting rod; 7, welding structure; 8, clamping wheel; 9, damping structure; 91, clamping strip; 10, inner cavity bevel gear; 11, bent elastic telescopic rod; 12, outer edge shaft; 13, sleeve shaft; 14, cleaning soft wheel; 15, bent insertion rod; 16, anti-torsion rod; 17, insertion hole; 18, elastic transmission structure; 181, tensioning wheel; 182, vertical shaft; 183, horizontal elastic telescopic rod; 184, conveyor belt; 19, driven bevel gear; 20, stress short rod; 21, inclined strip push plate; 22, annular telescopic structure; 221, left ring; 222, right ring; 223, horizontal rod; 23, short arc bevel gear ring; 24, long arc bevel gear ring; 25, ring frame; 26, concentric ring; 261, distance fixing plate; 27, power telescopic rod; 28, driving bevel gear ring; 29, pushing ring; 30, driving spur gear; 31, power motor; 32, stress cover cylinder; 33, ball. Detailed implementation manners

[0022] The following further describes the present invention in detail Figures 1 - 8 in conjunction with the attached

[0023] The embodiment of the present invention discloses an automatic welding system for bridge steel structures. As Figures 1 - 8As shown in the figure, it includes a welding table 1 and two material fixing tables 2. Both of the two material fixing tables 2 are fixedly installed on the upper surface of the welding table 1. The material fixing strip 2 can fixedly support the steel structure. A main ring 5 is fixedly installed on the upper surface of the welding table 1 and between the two material fixing tables 2. An installation ring 3 is coaxially and rotatably sleeved on the right end of the main ring 5. An active spur gear 30 is meshed with the outer ring surface of the installation ring 3. A power motor 31 is fixedly installed on the outer ring surface of the main ring 5. The active spur gear 30 is fixed to the output end of the power motor 31. The power motor 31 drives the active spur gear 30 to rotate and mesh with the installation ring 3, providing torque for the rotation of the installation ring 3. A threaded shaft 4 slidably penetrates through the outer ring surface of the installation ring 3. One end of the threaded shaft 4 located on the inner ring side of the installation ring 3 is fixed with a bent connecting rod 6. A groove-like structure is provided at the mating part of the threaded shaft 4 and the installation ring 3, so that the threaded shaft 4 will not rotate relative to the installation ring 3. The other end of the bent connecting rod 6 is installed with a welding structure 7. The welding structure 7 can perform welding treatment on the contacted steel structure. A force-receiving cover cylinder 32 is coaxially and elastically slidably sleeved at the lower end of the welding structure 7. A plurality of balls 33 are rotatably embedded at the lower end of the force-receiving cover cylinder 32. When the welding structure 7 approaches the steel structure, the force-receiving cover cylinder 32 contacts the steel structure first, buffering the collision force between the steel structure and the welding structure 7. The balls 33 reduce the wear suffered by the force-receiving cover cylinder 32 when moving relative to the steel structure.

[0024] A clamping wheel 8 is threadedly sleeved on the end of the threaded shaft 4 located outside the installation ring 3. An inner cavity bevel gear 10 is rotatably sleeved on the outer surface of the clamping wheel 8. The clamping wheel 8 is elastically connected to the outer ring surface of the installation ring 3. The inner ring surface of the inner cavity bevel gear 10 and the outer ring surface of the clamping wheel 8 are damping-connected through a damping structure 9. The damping structure 9 includes a clamping bar 91. The outer circumferential side surface of the clamping wheel 8 is a structure with multiple tooth grooves. The clamping bar 91 is slidably inserted into one tooth groove structure of the clamping wheel 8. The clamping bar 91 is elastically connected to the inner ring surface of the inner cavity bevel gear 10. The clamping bar 91 meshes with the groove-like structure of the clamping wheel 8 under the elastic connection with the inner cavity bevel gear 10. The inner cavity bevel gear 10 can drive the clamping wheel 8 to rotate synchronously through the clamping bar 91. When the clamping wheel 8 rotates, it can drive the threaded shaft 4 to move along the axis by meshing with the threaded shaft 4.

[0025] On the inner ring surface of the mounting ring 3 and fixed at the rear side of the welding structure 7 is a bent elastic telescopic rod 11. The other end of the bent elastic telescopic rod 11 rotatably penetrates through an outer edge shaft 12. An elastic sliding sleeve 13 is sleeved on one end of the outer edge shaft 12 close to the axis of the mounting ring 3. The elastic connection between the sleeve shaft 13 and the outer edge shaft 12 has a tendency to drive the sleeve shaft 13 close to the bent elastic telescopic rod 11. A cleaning soft wheel 14 is fixed at one end of the sleeve shaft 13 close to the axis of the mounting ring 3. A bent insertion rod 15 is rotatably sleeved on the outer surface of the outer edge shaft 12. One end of the bent insertion rod 15 far from the axis of the mounting ring 3 slidably penetrates through an anti-twist rod 16. The bent elastic telescopic rod 11 is fixed to the anti-twist rod 16. A jack 17 is provided at a position corresponding to the bent insertion rod 15 on the bent connecting rod 6. The anti-twist rod 16 prevents the bent insertion rod 15 from moving relative to the bent elastic telescopic rod 11, so that when the bent insertion rod 15 approaches the bent connecting rod 6, it can be inserted into the jack 17. The bent elastic telescopic rod 11 has a tendency to drive the bent insertion rod 15 to disengage from the jack 17. The outer end of the jack 17 is of an enlarged hole structure. The jack 17 is coaxially arranged with the bent insertion rod 15. The outer diameter of the bent insertion rod 15 is equal to the inner diameter of the jack 17. The enlarged hole-shaped jack 17 increases the range for the bent insertion rod 15 to be inserted into the jack 17, so that when the bent connecting rod 6 moves out of position relative to the mounting ring 3 by a certain amount, the bent insertion rod 15 can still be inserted into the jack 17. The elastic connection between the clamping wheel 8 and the mounting ring 3 has a tendency to drive the jack 17 and the bent insertion rod 15 to be coaxial by meshing with the threaded shaft 4.

[0026] An elastic transmission structure 18 is installed at one end of the outer edge shaft 12 far from the axis of the mounting ring 3. A driven bevel gear 19 is installed at the other end of the elastic transmission structure 18. The driven bevel gear 19 is rotatably connected to the mounting ring 3. The elastic transmission structure 18 is connected to the mounting ring 3. A force-bearing short rod 20 is fixed at one end of the bent elastic telescopic rod 11 close to the mounting ring 3. An inclined strip push plate 21 is arranged at the rear side of the force-bearing short rod 20. The inclined strip push plate 21 is elastically connected to the inner ring surface of the mounting ring 3. The elastic transmission structure 18 includes a tensioning wheel 181 and a vertical shaft 182. The lower end of the vertical shaft 182 is rotatably connected to the tensioning wheel 181. The upper end of the vertical shaft 182 is fixed with a horizontal elastic telescopic rod 183. The other end of the horizontal elastic telescopic rod 183 is fixed to the mounting ring 3. The lower end of the driven bevel gear 19 and the upper end of the outer edge shaft 12 are driven by a conveyor belt 184. The conveyor belt 184 is in sliding contact with the outer circumferential side surface of the tensioning wheel 181. When the bent elastic telescopic rod 11 extends, the horizontal elastic telescopic rod 183 pushes the conveyor belt 184 by pushing the tensioning wheel 181, so that the conveyor belt 184 is always kept taut and stable for transmission.

[0027] On the right side of the mounting ring 3, there is an annular telescopic structure 22. Fixed to the left telescopic end of the annular telescopic structure 22 are multiple short arc-shaped bevel gear rings 23. Between every two adjacent short arc-shaped bevel gear rings 23, there is a long arc-shaped bevel gear ring 24. The long arc-shaped bevel gear ring 24 is fixed to the right telescopic end of the annular telescopic structure 22. On the upper surface of the welding table 1 and on the right side of the annular telescopic structure 22, there is a concentric ring 26. A ring frame 25 slidably penetrates through the right side surface of the concentric ring 26. The left end of the ring frame 25 is fixed to the right telescopic end of the annular telescopic structure 22. Fixed to the upper surface of the concentric ring 26 is a power telescopic rod 27. The right end of the power telescopic rod 27 is fixed to the ring frame 25. On the right side of the driven bevel gear 19, there is a driving bevel gear ring 28. The driving bevel gear ring 28 is fixed to the right telescopic end of the annular telescopic structure 22. The annular telescopic structure 22 includes a left ring 221 and a right ring 222. The left ring 221 is located on the left side of the right ring 222. The left ring 221 is elastically connected to the right ring 222. The left ring 221 is connected to the short arc-shaped bevel gear ring 23. The right ring 222 is connected to the long arc-shaped bevel gear ring 24. The right ring 222 is fixed to the ring frame 25. The driving bevel gear ring 28 is fixed to the left ring 221. On the right side of the inclined strip push plate 21, there is a push ring 29. The push ring 29 is fixed to the inner ring surface of the driving bevel gear ring 28. Fixed to the outer ring surface of the left ring 221 is a horizontal rod 223. The right ring 222 is slidably sleeved on the outer surface of the horizontal rod 223. The left ring 221 and the right ring 222 are coaxially arranged. Fixed to the outer ring surface of the concentric ring 26 are multiple distance-fixed plates 261. The left end of the distance-fixed plate 261 bends towards the axis of the concentric ring 26. The bent end of the distance-fixed plate 261 is located on the left side of the left ring 221. When the left ring 221 contacts the bent end of the distance-fixed plate 261, the left ring 221 stops moving. The short arc-shaped bevel gear ring 23 is tangent to the inner cavity bevel gear 10. Before controlling the long arc-shaped bevel gear ring 24 to be tangent to the inner cavity bevel gear 10, first control the short arc-shaped bevel gear ring 23 to disengage from the inner cavity bevel gear 10, so that the bent connecting rod 6 is in the initial position, facilitating the push ring 29 to push the inclined strip push plate 21 to move leftward. By pushing the stressed short rod 20, the bent elastic telescopic rod 11 is stretched, so that the bent insertion rod 15 is inserted into the insertion hole 17. When the long arc-shaped bevel gear ring 24 is tangent to the inner cavity bevel gear 10, multiple long arc-shaped bevel gear rings 24 and multiple short arc-shaped bevel gear rings 23 form an annular structure. At the same time, the driving bevel gear ring 28 meshes with the driven bevel gear 19. When the mounting ring 3 rotates, the driven bevel gear 19 drives the conveyor belt 184 to rotate through meshing with the driving bevel gear ring 28, driving the cleaning soft wheel 14 to move relative to the steel structure weld while rotating around the axis of the sleeve shaft 13, increasing the cleaning effect of the cleaning soft wheel 14.

[0028] The working principle is as follows: The welding ends of two steel structures to be welded are brought into contact and fixed inside the mounting ring 3. The welding structure 7 is aligned with the welding positions of the two steel structures. The power telescopic rod 27 pushes the left ring 221 and the right ring 222 to move leftward through the ring frame 25. The short arc bevel gear ring 23 and the long arc bevel gear ring 24 move synchronously with the left ring 221 and the right ring 222. When the left ring 221 contacts the bent end of the distance plate 261, the left ring 221 stops moving. The short arc bevel gear ring 23 is tangent to the inner cavity bevel gear 10. When controlling the rotation of the mounting ring 3, when the inner cavity bevel gear 10 meshes with the short arc bevel gear ring 23, the damping structure 9 drives the clamping wheel 8 to rotate and mesh with the threaded shaft 4, pushing the bent connecting rod 6 and the welding structure 7 towards the steel structure at the axis of the mounting ring 3, so that the welding structure 7 is pushed to contact and weld with the steel structure. When the inner cavity bevel gear 10 continues to rotate, it rotates relative to the clamping wheel 8. When the inner cavity bevel gear 10 disengages from the short arc bevel gear ring 23, the clamping wheel 8 rotates back under the elastic connection with the mounting ring 3, driving the welding structure to disengage from the steel structure for short-distance welding treatment. At this time, the bent insertion rod 15 disengages from the insertion hole 17, and the cleaning soft wheel 14 does not clean the welding area. When the mounting ring 3 drives the welding structure 7 to rotate around the steel structure for one week, the inner cavity bevel gear 10 can drive the welding structure 7 to perform welding treatment at multiple positions around the steel structure through meshing with multiple short arc bevel gear rings 23, increasing the connectivity between the steel structures. Then, the right ring 222 is further pushed, so that the long arc bevel gear ring 24 is tangent to the inner cavity bevel gear 10. Multiple long arc bevel gear rings 24 and multiple short arc bevel gear rings 23 form an annular structure. At the same time, the push ring 29 pushes the inclined strip push plate 21 to move leftward, driving the bent elastic telescopic rod 11 to stretch through the push force receiving short rod 20, so that the bent insertion rod 15 is inserted into the insertion hole 17. When the mounting ring 3 rotates again, the inner cavity bevel gear 10 drives the welding structure 7 to approach the steel structure through meshing with the short arc bevel gear ring 23 and the long arc bevel gear ring 24, so that the cleaning soft wheel 14 moves downward synchronously with the welding structure 7. When the welding structure 7 welds the steel structure, the cleaning soft wheel 14 simultaneously cleans the welded seam, and there is a welding point on the other side of the steel structure receiving force during cleaning.

[0029] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. An automatic welding system for bridge steel structures, comprising a welding table (1) and two material fixing tables (2), and the two material fixing tables (2) are both fixedly installed on the upper surface of the welding table (1), and it is characterized in that: On the upper surface of the welding table (1) and between two material fixing tables (2), a main ring (5) is fixed. A mounting ring (3) is coaxially rotatably sleeved at the right end of the main ring (5). A threaded shaft (4) slidably penetrates through the outer ring surface of the mounting ring (3). One end of the threaded shaft (4) on the inner ring side of the mounting ring (3) is fixed with a bent connecting rod (6). The other end of the bent connecting rod (6) is equipped with a welding structure (7). One end of the threaded shaft (4) outside the mounting ring (3) is threadedly sleeved with a clamping wheel (8). The outer surface of the clamping wheel (8) is rotatably sleeved with an inner cavity bevel gear (10). The clamping wheel (8) is elastically connected to the outer ring surface of the mounting ring (3). The inner ring surface of the inner cavity bevel gear (10) and the outer ring surface of the clamping wheel (8) are damping-connected through a damping structure (9). On the inner ring surface of the mounting ring (3) and behind the welding structure (7), a bent elastic telescopic rod (11) is fixed. The other end of the bent elastic telescopic rod (11) rotatably penetrates through an outer-edge shaft (12). One end of the outer-edge shaft (12) close to the axis of the mounting ring (3) is elastically slidably sleeved with a sleeve shaft (13). One end of the sleeve shaft (13) close to the axis of the mounting ring (3) is fixed with a cleaning soft wheel (14). The outer surface of the outer-edge shaft (12) is rotatably sleeved with a bent insertion rod (15). One end of the bent insertion rod (15) away from the axis of the mounting ring (3) slidably penetrates through an anti-twist rod (16). The bent elastic telescopic rod (11) is fixed to the anti-twist rod (16). A jack (17) is provided at a position corresponding to the bent insertion rod (15) on the bent connecting rod (6). One end of the outer-edge shaft (12) away from the axis of the mounting ring (3) is equipped with an elastic transmission structure (18). The other end of the elastic transmission structure (18) is equipped with a driven bevel gear (19). The driven bevel gear (19) is rotatably connected to the mounting ring (3). The elastic transmission structure (18) is connected to the mounting ring (3). One end of the bent elastic telescopic rod (11) close to the mounting ring (3) is fixed with a force-bearing short rod (20). A slanted-strip push plate (21) is arranged behind the force-bearing short rod (20). The slanted-strip push plate (21) is elastically connected to the inner ring surface of the mounting ring (3). A ring-shaped telescopic structure (22) is arranged on the right side of the mounting ring (3). A plurality of short arc-shaped bevel gear rings (23) are fixed to the left telescopic end of the ring-shaped telescopic structure (22). A long arc-shaped bevel gear ring (24) is arranged between every two adjacent short arc-shaped bevel gear rings (23). The long arc-shaped bevel gear ring (24) is fixed to the right telescopic end of the ring-shaped telescopic structure (22). A concentric ring (26) is fixed on the upper surface of the welding table (1) and on the right side of the ring-shaped telescopic structure (22). A ring frame (25) slidably penetrates through the right side surface of the concentric ring (26). The left end of the ring frame (25) is fixed to the right telescopic end of the ring-shaped telescopic structure (22). A power telescopic rod (27) is fixed to the upper surface of the concentric ring (26). The right end of the power telescopic rod (27) is fixed to the ring frame (25). A driving bevel gear ring (28) is arranged on the right side of the driven bevel gear (19). The driving bevel gear ring (28) is fixed to the right telescopic end of the ring-shaped telescopic structure (22). A push ring (29) is arranged on the right side of the slanted-strip push plate (21). The push ring (29) is fixed to the inner ring surface of the driving bevel gear ring (28).

2. The automatic welding system for bridge steel structures according to claim 1, wherein: The damping structure (9) includes a clamping strip (91). The outer circumferential side surface of the clamping wheel (8) is a multi-tooth groove structure. The clamping strip (91) is slidably inserted into one of the tooth groove structures of the clamping wheel (8), and the clamping strip (91) is elastically connected to the inner ring surface of the inner cavity bevel gear (10).

3. An automatic welding system for bridge steel structures according to claim 1, characterized in that: The elastic transmission structure (18) includes a tensioning wheel (181) and a vertical shaft (182). The lower end of the vertical shaft (182) is rotatably connected to the tensioning wheel (181). A horizontal elastic telescopic rod (183) is fixed to the upper end of the vertical shaft (182). The other end of the horizontal elastic telescopic rod (183) is fixed to the mounting ring (3). The lower end of the driven bevel gear (19) and the upper end of the outer edge shaft (12) are driven by a conveyor belt (184). The conveyor belt (184) is in sliding contact with the outer circumferential side surface of the tensioning wheel (181).

4. An automatic welding system for bridge steel structures according to claim 1, characterized in that: A driving spur gear (30) is engaged with the outer ring surface of the mounting ring (3). A power motor (31) is fixed to the outer ring surface of the main ring (5). The driving spur gear (30) is fixed to the output end of the power motor (31).

5. The automatic welding system for bridge steel structures according to claim 1, characterized in that: The outer end of the jack (17) is a reamed hole structure. The jack (17) is coaxially arranged with the bent plug rod (15). The outer diameter of the bent plug rod (15) is equal to the inner diameter of the jack (17).

6. The automatic welding system for bridge steel structures according to claim 1, characterized in that: The annular telescopic structure (22) includes a left ring (221) and a right ring (222). The left ring (221) is located on the left side of the right ring (222). The left ring (221) is elastically connected to the right ring (222). The left ring (221) is connected to the short arc bevel gear ring (23). The right ring (222) is connected to the long arc bevel gear ring (24). The right ring (222) is fixed to the ring frame (25). The driving bevel gear ring (28) is fixed to the left ring (221).

7. An automatic welding system for bridge steel structures according to claim 6, characterized in that: A horizontal rod (223) is fixed to the outer ring surface of the left ring (221). The right ring (222) is slidably sleeved on the outer surface of the horizontal rod (223). The left ring (221) and the right ring (222) are coaxially arranged.

8. An automatic welding system for bridge steel structures according to claim 6, characterized in that: A plurality of spacing plates (261) are fixed to the outer ring surface of the concentric ring (26). The left end of the spacing plate (261) is bent towards the axis of the concentric ring (26). The bent end of the spacing plate (261) is located on the left side of the left ring (221).

9. The automatic welding system for bridge steel structures according to claim 1, characterized in that: A force-bearing cover cylinder (32) is coaxially and elastically slidably sleeved on the lower end of the welding structure (7). A plurality of balls (33) are rotatably embedded at the lower end of the force-bearing cover cylinder (32).

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