Structural part welding device for bridge engineering construction

Abstract

The invention relates to the field of bridge structural part welding equipment, and discloses a structural part welding device for bridge engineering construction, which comprises a worktable, a mounting frame is movably arranged in the middle of the top end of the worktable, and movable tables are movably mounted on two sides of the top end of the mounting frame through guide rails; bearing frames are fixedly mounted on the outer sides of the top ends of the movable tables correspondingly, three-jaw chucks are movably mounted at the inner side ends of the bearing frames correspondingly, lower hinged supports are fixedly mounted on the front side and the rear side of the bottom wall of the workbench correspondingly, and electric cylinders are movably mounted on the two sides of the top ends of the lower hinged supports correspondingly; upper hinged supports are fixedly mounted at the four corners of the bottom end of the mounting frame correspondingly, and the tail ends of the electric cylinders are movably mounted at the bottoms of the upper hinged supports on the corresponding sides correspondingly. According to the multi-axis welding device, butt joint workpieces can be efficiently clamped, comprehensive welding is achieved through multi-axis movement and multi-angle adjustment, inert gas can be guided in for protection, harmful gas can be collected, and the welding efficiency, quality and safety are improved.

Description

Technical Field

[0001] The invention relates to the field of bridge structural component welding equipment, in particular to a structural component welding device for bridge engineering construction. Background Art

[0002] In modern bridge construction, the welding quality of structural parts is directly related to the overall stability and safety of the bridge. As the scale of bridge construction continues to expand, the requirements for the accuracy, efficiency and comprehensiveness of structural welding are becoming increasingly stringent. Traditional bridge structural welding work faces many challenges.

[0003] In the clamping and docking of workpieces, manual clamping was often used in the past, which not only consumed a lot of manpower and time, but also made it difficult to ensure the accuracy and stability of clamping. This easily led to deviations in the welds, affecting the welding quality, and required a lot of rework and correction work later, which seriously slowed down the progress of the project. For example, in the welding of box girders of some large bridges, manual clamping could not ensure the precise docking of the components, resulting in uneven welds and reduced the bearing capacity of the box girders.

[0004] From the perspective of welding movement, the movement mode of conventional welding equipment is relatively simple. Most of them can only achieve simple straight-line welding. For complex-shaped bridge structures, such as nodes with curved connections or complex internal structures, it is difficult to achieve full-scale welding operations. This results in some welding areas being unable to be effectively welded, forming welding dead angles, greatly weakening the connection strength of the structural parts, and posing safety hazards to bridge projects.

[0005] In terms of welding angle adjustment, the limitations of traditional equipment are also very prominent. For structural parts that need to be welded from different angles, traditional equipment is often unable to cope with them flexibly. When welding special parts such as the anchor end of the bridge's inclined cable, since the equipment cannot easily adjust the welding angle, the operator has to use complex auxiliary tooling to achieve it, which not only increases the difficulty of operation, but also makes it difficult to ensure the consistency of welding quality.

[0006] Gas protection and waste gas collection are also challenges faced by traditional welding. During the welding process, high temperature will cause metal oxidation. If there is a lack of effective gas protection, defects such as pores and cracks are likely to appear at the welding site, reducing the welding strength. At the same time, if the harmful gases generated by welding are not collected in time, it will cause serious damage to the health of the operators and fail to meet environmental protection requirements. In some construction sites with poor ventilation conditions, harmful gases accumulate, causing long-term damage to the respiratory and nervous systems of workers. Summary of the invention

[0007] In view of the shortcomings of the prior art, the present invention provides a structural member welding device for bridge engineering construction, which solves the problems of difficult workpiece clamping and docking, single welding movement, inconvenient angle adjustment, and insufficient gas protection and exhaust gas collection in traditional bridge structural member welding. It can improve welding quality and efficiency, and ensure construction safety and environmental protection.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a structural member welding device for bridge engineering construction, comprising a workbench, a mounting frame is movably provided at the middle of the top of the workbench, movable platforms are movably installed on both sides of the top of the mounting frame through guide rails, bearing frames are fixedly installed on the outer side of the top of the movable platform, three-jaw chucks are movably installed on the inner ends of the bearing frames, lower hinge supports are fixedly installed on the front and rear sides of the bottom wall of the workbench, electric cylinders are movably installed on both sides of the top of the lower hinge supports, upper hinge supports are fixedly installed at the four corners of the bottom end of the mounting frame, and the ends of the electric cylinders are movably installed respectively. Installed on the bottom of the upper hinge support on the corresponding side, an X-axis linear motion module is fixedly installed on the rear side of the upper surface of the workbench, the driving end of the X-axis linear motion module is fixedly installed with a Z-axis linear motion module, the driving end of the Z-axis linear motion module is fixedly installed with a Y-axis linear motion module, the driving end of the Y-axis linear motion module is fixedly installed with a movable block, a rotating cylinder is movably installed on one side of the inner part of the movable block, a hollow bent air intake pipe and a hollow bent exhaust pipe are respectively fixedly installed on both sides of the inner part of the rotating cylinder, and the inner end bottoms of the hollow bent air intake pipe and the hollow bent exhaust pipe are respectively fixedly installed on both ends of the laser welding gun.

[0009] Preferably, a sleeve is movably installed in the middle of the top of the mounting frame, and a transmission rod is movably installed on both sides of the interior of the sleeve. Key slots are provided on the upper and lower sides of the interior of the sleeve, and splines are fixedly provided on the upper and lower ends of the transmission rod and the outer walls of the splines are movably provided inside the key slots on the corresponding sides. The outer ends of the transmission rod extend to the interior of the movable platform on the corresponding sides and are fixedly installed with small gears. A large gear is fixedly installed on the outer diameter of the three-jaw chuck, and the inner ends of the large gear and the small gear on the corresponding sides are meshed and connected.

[0010] Preferably, a first motor is fixedly mounted on one side of the bottom end of the mounting frame, a driving end of the first motor extends to the top of the mounting frame and a worm is fixedly mounted thereon, a worm wheel is fixedly mounted on the middle outer diameter of the sleeve and the worm wheel is meshedly connected to the inner end of the worm wheel.

[0011] Preferably, straight slots are provided on both sides of the interior of the mounting frame, a threaded seat is fixedly installed on the bottom end of the movable platform and the ends of the threaded seats pass through the interior of the straight slots on the corresponding side and extend to the bottom of the mounting frame, a bidirectional threaded rod is movably installed in the middle part of the lower part of the mounting frame and the outer diameters on both sides of the bidirectional threaded rod are respectively threadedly connected to the middle part of the threaded seat on the corresponding side, a second motor is fixedly installed on one side of the mounting frame and the driving end of the second motor is fixedly installed on one end of the bidirectional threaded rod.

[0012] Preferably, a driven gear is fixedly mounted on the bottom outer diameter of the rotating drum, a third motor is fixedly mounted on one side of the top end of the movable block, the driving end of the third motor extends to the bottom of the movable block and is fixedly mounted with a driving gear, and the driving gear is meshed and connected with the inner end of the driven gear.

[0013] Preferably, an air transfer chamber is fixedly installed in the middle of the front end of the workbench, an inert gas storage box is fixedly installed on one side of the front side of the workbench, an exhaust gas collection box is fixedly installed on the other side of the front end of the workbench, a reciprocating cylinder is fixedly installed on one side of the air transfer chamber, and the driving end of the reciprocating cylinder extends to the interior of the air transfer chamber and is fixedly installed with a piston.

[0014] Preferably, a first air intake pipe is fixedly installed on one side of the bottom of the inert gas storage box, and the end of the first air intake pipe extends to one side of the inner bottom of the air transfer chamber, a first air outlet pipe is fixedly installed on one side of the top of the air transfer chamber, and the end of the first air outlet pipe extends to the top of the hollow bent air inlet pipe, a second air intake pipe is fixedly installed on the other side of the top of the air transfer chamber, and the end of the second air intake pipe extends to the top of the hollow bent exhaust pipe, a second air outlet pipe is fixedly installed on one side of the bottom of the exhaust gas collecting box, and the end of the second air intake pipe extends to the other side of the inner bottom of the air transfer chamber, and one-way valves are fixedly installed inside the first air intake pipe, the first air outlet pipe, the second air intake pipe and the second air outlet pipe.

[0015] The present invention provides a structural member welding device for bridge engineering construction, which has the following beneficial effects:

[0016] 1. The present invention can quickly and stably clamp the bridge structure to be welded through the three-jaw chucks on the left and right sides. At the same time, the second motor drives the bidirectional threaded rod to rotate. Cooperating with the threaded seat and the straight slot, the two workpieces can be moved inward synchronously and accurately docked, which improves the efficiency of clamping and docking and prepares for subsequent welding work.

[0017] 2. The present invention enables the laser welding gun to move forward, backward, left, right, up and down through the coordinated work of the X-axis linear motion module, the Y-axis linear motion module and the Z-axis linear motion module, so as to cover different positions of the workpiece and realize all-round welding operations. The third motor drives the driving gear to drive the driven gear and the rotating drum to rotate, so that the laser welding gun moves in a circle, and can weld the dead corners of the workpiece connection, thereby ensuring the integrity of the welding.

[0018] 3. The first motor of the present invention drives the worm to rotate the worm wheel and the sleeve, thereby rotating the transmission rod, the small gear, the large gear, the three-jaw chuck and the workpiece, thereby realizing welding on the bottom surface of the workpiece and increasing the welding angle range; the coordinated extension and retraction of the four electric cylinders can drive the workbench to tilt slightly forward, backward, left and right, further expanding the welding angle, being able to adapt to the welding requirements of different shapes and positions, and improving the comprehensiveness of welding.

[0019] 4. The present invention controls the piston to move back and forth in the gas transmission chamber by a reciprocating cylinder, and cooperates with the function of a one-way valve to achieve the introduction of inert gas and the collection of harmful gas. During welding, the inert gas is sprayed on the welding point to play a protective role, prevent oxidation of the welding part, and improve the welding quality; at the same time, the harmful gas is collected in time to prevent it from being emitted into the working environment, which ensures the health and safety of the operator and improves the safety of welding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the mounting frame in the present invention;

[0022] Figure 3 It is a bottom view structural diagram of the mounting frame in the present invention;

[0023] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 5 It is a schematic diagram of the internal structure of the sleeve in the present invention;

[0025] Figure 6 It is a structural schematic diagram of the movable block in the present invention;

[0026] Figure 7 Schematic diagram of the internal structure of the air transfer chamber in the present invention.

[0027] Among them, 1. workbench; 2. mounting frame; 3. movable table; 4. bearing frame; 5. three-jaw chuck; 6. sleeve; 7. transmission rod; 8. keyway; 9. spline; 10. small gear; 11. large gear; 12. first motor; 13. worm; 14. worm wheel; 15. straight slot; 16. threaded seat; 17. two-way threaded rod; 18. second motor; 19. lower hinge support; 20. electric cylinder; 21. upper hinge support; 22. X-axis linear motion module; 23. Z-axis linear motion module Group; 24, Y-axis linear motion module; 25, movable block; 26, rotating drum; 27, hollow bent air inlet pipe; 28, hollow bent exhaust pipe; 29, laser welding gun; 30, driven gear; 31, third motor; 32, driving gear; 33, air transfer chamber; 34, inert gas storage box; 35, exhaust gas collection box; 36, reciprocating cylinder; 37, piston; 38, first air intake pipe; 39, first air outlet pipe; 40, second air intake pipe; 41, second air outlet pipe; 42, one-way valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings of the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example:

[0030] Please see attached Figure 1 -Attached Figure 7 The embodiment of the present invention provides a structural member welding device for bridge engineering construction, such as Figure 1As shown, the workbench 1 includes a workbench 1, which serves as the basic bearing platform of the entire device and provides a stable installation support for other components. A mounting frame 2 is movably arranged in the middle of the top thereof. The mounting frame 2 can be flexibly adjusted at a certain angle on the workbench 1 to provide a variable basis for the movement and operation of subsequent components. A movable table 3 is movably installed on both sides of the top of the mounting frame 2 through guide rails. The design of the guide rails enables the movable table 3 to slide smoothly along a specific direction. A bearing frame 4 is fixedly installed on the outer side of the top of the movable table 3. The bearing frame 4 provides a stable installation position for the three-jaw chuck 5 to ensure its normal operation. The inner ends of the bearing frames 4 are movably installed. A three-jaw chuck 5 is installed, which can be used to quickly and firmly clamp the bridge structure to be welded, so as to facilitate the subsequent welding operation. The front and rear sides of the bottom wall of the workbench 1 are fixedly installed with lower hinge supports 19, which play the role of connecting and supporting the electric cylinder 20. The electric cylinder 20 is movably installed on both sides of the top of the lower hinge support 19. The electric cylinder 20 can adjust the angle of the mounting frame 2 by retracting its internal piston rod. Upper hinge supports 21 are fixedly installed at the four corners of the bottom end of the mounting frame 2. The ends of the electric cylinder 20 are movably installed at the bottom of the upper hinge supports 21 on the corresponding sides. Through this connection method, the electric cylinder 20 can adjust the angle of the mounting frame 2. The angle control of the mounting frame 2 is performed, and an X-axis linear motion module 22 is fixedly installed on the rear side of the upper surface of the workbench 1. The X-axis linear motion module 22 can drive the components connected thereto to perform linear motion on the horizontal X-axis. The driving end of the X-axis linear motion module 22 is fixedly installed with a Z-axis linear motion module 23. The Z-axis linear motion module 23 can drive the components to move on the vertical Z-axis. The driving end of the Z-axis linear motion module 23 is fixedly installed with a Y-axis linear motion module 24. The Y-axis linear motion module 24 is responsible for the movement of the components on the horizontal Y-axis. The driving end of the Y-axis linear motion module 24 is fixedly installed with a movable block 25. The movable block 25 is used to install and fix other actuators. A rotating cylinder 26 is movably installed on one side of the inner part of the movable block 25. The rotating cylinder 26 can rotate flexibly in the movable block 25. A hollow bent air inlet pipe 27 and a hollow bent exhaust pipe 28 are fixedly installed on both sides of the inner part of the rotating cylinder 26. The hollow bent air inlet pipe 27 and the hollow bent exhaust pipe 28 respectively undertake the important tasks of introducing inert gas and discharging harmful gas. The inner end bottoms of the hollow bent air inlet pipe 27 and the hollow bent exhaust pipe 28 are respectively fixedly installed on the two ends of the laser welding gun 29, so that the laser welding gun 29 can simultaneously realize the functions of gas protection and exhaust gas collection when performing welding work.

[0031] In this embodiment, a sleeve 6 is movably installed in the middle of the top of the mounting frame 2, and the sleeve 6 can rotate on the mounting frame 2. A transmission rod 7 is movably installed on both sides of the interior of the sleeve 6. The transmission rod 7 can rotate in the sleeve 6 as the sleeve 6 rotates. Key grooves 8 are provided on the upper and lower sides of the interior of the sleeve 6. Splines 9 are fixedly provided on the upper and lower ends of the transmission rod 7, and the outer walls of the splines 9 are movably provided in the corresponding side key grooves 8. Through the cooperation of the splines 9 and the key grooves 8, it is ensured that the transmission rod 7 can rotate with the rotation of the sleeve 6, and the movement direction of the transmission rod 7 is also limited. The outer ends of the transmission rod 7 extend to the interior of the corresponding side movable platform 3 and are fixedly installed with a pinion 10. The pinion 10 can rotate with the rotation of the transmission rod 7. A large gear 11 is fixedly installed on the outer diameter of the three-jaw chuck 5. The corresponding side large gear 11 and the inner side end of the pinion 10 are meshed and connected. When the pinion 10 rotates, the three-jaw chuck 5 can be driven to rotate by meshing with the large gear 11.

[0032] Furthermore, a first motor 12 is fixedly installed on one side of the bottom end of the mounting frame 2. The first motor 12 provides a power source for the entire transmission system. The driving end of the first motor 12 extends to the top of the mounting frame 2 and is fixedly installed with a worm 13. After the first motor 12 is started, it drives the worm 13 to rotate. A worm wheel 14 is fixedly installed on the middle outer diameter of the sleeve 6 and the worm wheel 14 is meshed with the inner end of the worm 13. The rotation of the worm 13 drives the sleeve 6 to rotate through the meshing with the worm wheel 14.

[0033] Furthermore, straight slots 15 are provided on both sides of the interior of the mounting frame 2, and the straight slots 15 provide a limit and guide function for the movement of the threaded seat 16. The bottom end of the movable platform 3 is fixedly installed with a threaded seat 16, and the ends of the threaded seat 16 pass through the interior of the corresponding side straight slots 15 and extend to the bottom of the mounting frame 2. The threaded seat 16 cooperates with the bidirectional threaded rod 17 to achieve the position adjustment of the movable platform 3. A bidirectional threaded rod 17 is movably installed in the middle part of the lower part of the mounting frame 2, and the outer diameters of both sides of the bidirectional threaded rod 17 are respectively threadedly connected to the middle part of the corresponding side threaded seat 16. The bidirectional threaded rod 17 consists of two threaded rods with opposite spiral directions. When the bidirectional threaded rod 17 rotates, it can drive the two threaded seats 16 to move inward or outward at the same time. A second motor 18 is fixedly installed on one side of the mounting frame 2, and the driving end of the second motor 18 is fixedly installed on one end of the bidirectional threaded rod 17. The second motor 18 provides power for the rotation of the bidirectional threaded rod 17, thereby achieving precise control of the position of the movable platform 3.

[0034] Furthermore, a driven gear 30 is fixedly installed on the outer diameter of the bottom of the rotating drum 26, and the driven gear 30 can rotate with the rotation of the rotating drum 26. A third motor 31 is fixedly installed on one side of the top of the movable block 25. The third motor 31 provides power for the circular motion of the laser welding gun 29. The driving end of the third motor 31 extends to the bottom of the movable block 25 and is fixedly installed with a driving gear 32, and the driving gear 32 is meshed and connected with the inner end of the driven gear 30. After the third motor 31 is started, it drives the driving gear 32 to rotate, and through the meshing with the driven gear 30, it drives the rotating drum 26 and the laser welding gun 29 to make circular motion.

[0035] Furthermore, a gas transfer chamber 33 is fixedly installed in the middle of the front end of the workbench 1. The gas transfer chamber 33 is a key component for realizing the introduction of inert gas and the collection of harmful gas. An inert gas storage box 34 is fixedly installed on one side of the front side of the workbench 1. The inert gas storage box 34 is used to store the inert gas required for welding. A waste gas collection box 35 is fixedly installed on the other side of the front end of the workbench 1. The waste gas collection box 35 is used to collect harmful gases generated during welding. A reciprocating cylinder 36 is fixedly installed on one side of the gas transfer chamber 33. The reciprocating cylinder 36 provides power for the flow of gas in the gas transfer chamber 33. The driving end of the reciprocating cylinder 36 extends to the interior of the gas transfer chamber 33 and is fixedly installed with a piston 37. The piston 37 is driven by the reciprocating cylinder 36 to move back and forth in the gas transfer chamber 33 to realize the suction and discharge of gas.

[0036] Furthermore, a first air intake pipe 38 is fixedly installed on one side of the bottom of the inert gas storage box 34, and the end of the first air intake pipe 38 extends to one side of the inner bottom of the air transfer chamber 33. When the air pressure in the left space of the air transfer chamber 33 decreases, the one-way valve 42 of the first air intake pipe 38 is opened, and the inert gas in the inert gas storage box 34 is sucked into the left space of the air transfer chamber 33. A first air outlet pipe 39 is fixedly installed on one side of the top of the air transfer chamber 33, and the end of the first air outlet pipe 39 extends to the top of the hollow bent air inlet pipe 27. When the air pressure in the left space of the air transfer chamber 33 increases, the one-way valve 42 of the first air outlet pipe 39 is opened, and the inert gas enters the hollow bent air inlet pipe 27 along the first air outlet pipe 39. A second air intake pipe 40 is fixedly installed on the other side of the top of the air transfer chamber 33, and the end of the second air intake pipe 40 extends to the hollow bent exhaust pipe 27. The top of the air pipe 28, when the air pressure in the space on the right side of the air transfer chamber 33 decreases, the one-way valve 42 of the second air intake pipe 40 is opened, and the harmful gas generated during welding enters the second air intake pipe 40 through the hollow bent exhaust pipe 28, and a second air outlet pipe 41 is fixedly installed on one side of the bottom of the exhaust gas collecting box 35, and the end of the second air intake pipe 40 extends to the other side of the inner bottom of the exhaust chamber 33. When the air pressure in the space on the right side of the air transfer chamber 33 increases, the one-way valve 42 of the second air outlet pipe 41 is opened, and the harmful gas enters the exhaust gas collecting box 35 through the second air outlet pipe 41. The first air intake pipe 38, the first air outlet pipe 39, the second air intake pipe 40 and the second air outlet pipe 41 are all fixedly installed with a one-way valve 42. The one-way valve 42 ensures that the gas can only flow in a specific direction, thereby realizing the introduction of inert gas and the collection of harmful gas during welding.

[0037] Working principle: First, put the two bridge structural parts to be welded into the middle of the three-jaw chuck 5 on the left and right sides respectively, and use the three-jaw chuck 5 to clamp the workpiece. The three-jaw chuck 5 can fix the workpiece quickly and stably through its unique structural design, and then start the second motor 18, and drive the bidirectional threaded rod 17 to rotate through the second motor 18. The bidirectional threaded rod 17 is composed of two threaded rods with opposite spiral directions. When the bidirectional threaded rod 17 rotates, through the meshing action with the threaded seat 16 and the limiting action of the upper straight slot 15, the two threaded seats 16 and the movable table 3 are driven to move inward at the same time, thereby driving the workpiece to move inward synchronously, and the welding parts of the two workpieces are connected. After completion, turn on the laser welding gun 29 to perform laser welding on the welding part. The laser welding gun 29 emits a high-energy laser beam to quickly melt the materials at the welding point of the workpiece and connect them together. Through the coordinated action of the X-axis linear motion module 22, the Y-axis linear motion module 24 and the Z-axis linear motion module 23, the laser welding gun 29 is driven to move forward, backward, left, right, and up and down to achieve welding of the workpiece. The X-axis linear motion module 22 is responsible for the movement of the laser welding gun 29 on the horizontal X-axis, the Y-axis linear motion module 24 controls the movement on the horizontal Y-axis, and the Z-axis linear motion module 23 realizes the movement on the vertical Z-axis. The three work together to cover different positions of the workpiece. At the same time, the third motor 31 can also drive the driving gear 32 to rotate, drive the driven gear 30 and the rotating drum 26 to rotate, thereby driving the laser welding gun 29 at the bottom. 9 makes circular motion, which can realize welding of the dead angle at the connection of the workpiece, making up for the shortcomings of conventional linear motion welding. In addition, the worm 13 can be driven to rotate by the first motor 12, and the rotating worm 13 drives the worm wheel 14 and the sleeve 6 to rotate through meshing transmission. The rotating sleeve 6 drives the transmission rods 7 on both sides to rotate through the limited cooperation of the spline 9 and the keyway 8, thereby driving the small gear 10 at the end of the transmission rod 7 to rotate, and the rotating small gear 10 will drive the large gear 11 to rotate, thereby driving the three-jaw chuck 5 and the workpiece to rotate, realizing the welding work on the bottom surface of the workpiece, improving the comprehensiveness of welding, and enabling the welding operation to cover all surfaces of the workpiece. In addition, the coordinated extension and retraction of the internal piston rod can be driven by four electric cylinders 20, which can drive the workbench 1 to move forward. The welding hole 32 is provided with a small amount of front, back, left and right tilting to further improve the comprehensiveness of welding and adapt to the welding requirements of different shapes and positions. During welding, the reciprocating cylinder 36 is started, and the reciprocating cylinder 36 controls the piston 37 to move back and forth in the air transfer chamber 33. When the piston 37 moves to the right, the air pressure in the left space of the air transfer chamber 33 decreases, and the one-way valve 42 of the first air intake pipe 38 is opened, and the inert gas in the inert gas storage box 34 is sucked into the left space of the air transfer chamber 33. When the piston 37 moves to the left, the air pressure in the left space of the air transfer chamber 33 increases. At this time, the one-way valve 42 of the first air outlet pipe 39 is opened, and the inert gas enters the hollow bent air inlet pipe 27 along the first air outlet pipe 39, and is sprayed on the welding point by the hollow bent air inlet pipe 27 to achieve the protection effect during welding.To prevent oxidation of the welding part, similarly, when the piston 37 moves to the left, the air pressure on the right side of the air transfer chamber 33 decreases, the one-way valve 42 of the second air intake pipe 40 is opened, and the harmful gas generated during welding enters the second air intake pipe 40 through the hollow bent exhaust pipe 28, and finally enters the right side space of the air transfer chamber 33. When the piston 37 moves to the right, the air pressure on the right side of the air transfer chamber 33 increases, the one-way valve 42 of the second air outlet pipe 41 is opened, and the harmful gas enters the exhaust gas collection box 35 through the second air outlet pipe 41. Through the reciprocating motion of the piston 37, the inert gas is introduced and the harmful gas is collected during welding, which improves the safety of welding and protects the health of the operators.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A structural member welding device for bridge engineering construction, comprising a workbench (1), characterized in that: A mounting frame (2) is movably provided at the middle of the top of the workbench (1), and movable platforms (3) are movably installed on both sides of the top of the mounting frame (2) through guide rails. A bearing frame (4) is fixedly installed on the outer side of the top of the movable platform (3), and a three-jaw chuck (5) is movably installed on the inner side of the bearing frame (4). Lower hinge supports (19) are fixedly installed on the front and rear sides of the bottom wall of the workbench (1), and electric cylinders (20) are movably installed on both sides of the top of the lower hinge support (19). Upper hinge supports (21) are fixedly installed at the four corners of the bottom end of the mounting frame (2), and the ends of the electric cylinders (20) are movably installed on the bottom of the upper hinge supports (21) on the corresponding sides. The upper surface of the workbench (1) An X-axis linear motion module (22) is fixedly mounted on the rear side, a Z-axis linear motion module (23) is fixedly mounted on the driving end of the X-axis linear motion module (22), a Y-axis linear motion module (24) is fixedly mounted on the driving end of the Z-axis linear motion module (23), a movable block (25) is fixedly mounted on the driving end of the Y-axis linear motion module (24), a rotating cylinder (26) is movably mounted on one side of the interior of the movable block (25), a hollow bent air intake pipe (27) and a hollow bent exhaust pipe (28) are respectively fixedly mounted on both sides of the interior of the rotating cylinder (26), and the inner end bottoms of the hollow bent air intake pipe (27) and the hollow bent exhaust pipe (28) are respectively fixedly mounted on the two ends of a laser welding gun (29).

2. A structural member welding device for bridge engineering construction according to claim 1, characterized in that: A sleeve (6) is movably mounted in the middle of the top of the mounting frame (2), and a transmission rod (7) is movably mounted on both sides of the sleeve (6). Keyways (8) are provided on the upper and lower sides of the sleeve (6). Splines (9) are fixedly mounted on the upper and lower ends of the transmission rod (7), and the outer walls of the splines (9) are movably mounted inside the keyways (8) on the corresponding sides. The outer ends of the transmission rod (7) extend to the inside of the movable platform (3) on the corresponding sides and are fixedly mounted with a small gear (10). A large gear (11) is fixedly mounted on the outer diameter of the three-jaw chuck (5), and the inner ends of the large gear (11) and the small gear (10) on the corresponding sides are meshed and connected.

3. A structural member welding device for bridge engineering construction according to claim 2, characterized in that: A first motor (12) is fixedly mounted on one side of the bottom end of the mounting frame (2); a driving end of the first motor (12) extends to the top of the mounting frame (2) and is fixedly mounted with a worm (13); a worm wheel (14) is fixedly mounted on the middle outer diameter of the sleeve (6), and the worm wheel (14) is meshingly connected with the inner end of the worm wheel (13).

4. A structural member welding device for bridge engineering construction according to claim 1, characterized in that: Straight slots (15) are provided on both sides of the interior of the mounting frame (2); a threaded seat (16) is fixedly installed at the bottom end of the movable platform (3), and the ends of the threaded seats (16) penetrate the interior of the straight slots (15) on the corresponding side and extend to the bottom of the mounting frame (2); a bidirectional threaded rod (17) is movably installed in the middle of the bottom of the mounting frame (2), and the outer diameters of both sides of the bidirectional threaded rod (17) are respectively threadedly connected to the middle of the threaded seat (16) on the corresponding side; a second motor (18) is fixedly installed on one side of the mounting frame (2), and the driving end of the second motor (18) is fixedly installed on one end of the bidirectional threaded rod (17).

5. A structural member welding device for bridge engineering construction according to claim 1, characterized in that: A driven gear (30) is fixedly mounted on the outer diameter of the bottom of the rotating drum (26), a third motor (31) is fixedly mounted on one side of the top end of the movable block (25), a driving end of the third motor (31) extends to the bottom of the movable block (25) and is fixedly mounted with a driving gear (32), and the driving gear (32) is meshed and connected with the inner end of the driven gear (30).

6. A structural member welding device for bridge engineering construction according to claim 1, characterized in that: A gas transfer chamber (33) is fixedly mounted in the middle of the front end of the workbench (1); an inert gas storage box (34) is fixedly mounted on one side of the front side of the workbench (1); a waste gas collection box (35) is fixedly mounted on the other side of the front end of the workbench (1); a reciprocating cylinder (36) is fixedly mounted on one side of the gas transfer chamber (33); a driving end of the reciprocating cylinder (36) extends into the interior of the gas transfer chamber (33) and is fixedly mounted with a piston (37).

7. A structural member welding device for bridge engineering construction according to claim 6, characterized in that: A first air intake pipe (38) is fixedly mounted on one side of the bottom of the inert gas storage box (34), and the end of the first air intake pipe (38) extends to one side of the inner bottom of the air transfer chamber (33); a first air outlet pipe (39) is fixedly mounted on one side of the top of the air transfer chamber (33), and the end of the first air outlet pipe (39) extends to the top of the hollow bent air inlet pipe (27); a second air intake pipe (40) is fixedly mounted on the other side of the top of the air transfer chamber (33), and the end of the second air intake pipe (40) extends to the top of the hollow bent air exhaust pipe (28); a second air outlet pipe (41) is fixedly mounted on one side of the bottom of the waste gas collection box (35), and the end of the second air intake pipe (40) extends to the other side of the inner bottom of the air transfer chamber (33); and one-way valves (42) are fixedly mounted inside the first air intake pipe (38), the first air outlet pipe (39), the second air intake pipe (40) and the second air outlet pipe (41).

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