A painting-free weathering steel box arch bridge overturning and welding device

Abstract

The application relates to the technical field of welding devices, in particular to a painting-free weathering steel box arch bridge turnover welding device, which comprises a supporting working chassis, welding supporting frames are symmetrically arranged on the supporting working chassis, supporting rotating rollers are installed on the welding supporting frames and used for supporting a steel box during steel box welding; a turnover welding assembly is installed on one side of the welding supporting frame and used for welding the steel box; a turnover driving assembly is matched with the turnover welding assembly and drives the turnover welding assembly to turn over; when butt welding of the steel box is carried out, only one turnover of the steel box is needed to complete circumferential welding of a butt joint of the steel box, multiple turnover operations are not needed, the turnover is very convenient, the working strength of workers is greatly reduced, and the working efficiency of steel box welding is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding device, in particular to a kind of weathering steel box arch bridge overturning welding device of free painting. BACKGROUND

[0002] Free painting weathering steel box arch bridge is widely applied in modern bridge construction due to its excellent performance, steel box needs to be welded and connected between steel boxes by automatic semi-automatic welding machine after production, to ensure the integrity and carrying capacity of structure, steel box needs to be first docked to align two when welding between steel boxes, then circumferential welding is carried out to the docking place to ensure the firmness of welding, and symmetrical welding is generally required in the process of welding, to ensure welding quality, so steel box needs to be overturned for many times in the process of welding, since steel box is relatively heavy, it is more troublesome to overturn it for many times, so that the working strength of worker is larger, and the working efficiency of steel box welding is lower. SUMMARY

[0003] The present application aims to provide a kind of weathering steel box arch bridge overturning welding device of free painting, to solve the problem that steel box needs to be overturned for many times when circumferential welding is carried out between steel boxes in the background art described above, which is more troublesome to operate, thereby making the working strength of worker larger, and the welding working efficiency is lower.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A kind of weathering steel box arch bridge overturning welding device of free painting, comprising: support work chassis, welding support frame is symmetrically fixed on the support work chassis, support rotating roller is installed on the welding support frame, and the support rotating roller is used to support steel box when welding;

[0006] Overturning welding assembly, the overturning welding assembly is installed on one side of welding support frame, and is used to weld steel box;

[0007] Overturning drive assembly, the overturning drive assembly cooperates with overturning welding assembly to drive overturning welding assembly to overturn;

[0008] Overturning locking assembly, the overturning locking assembly is installed on overturning welding assembly, and is locked to ensure the stability of overturning welding assembly when welding steel box;

[0009] Steel box limiting adjustment assembly, the steel box limiting adjustment assembly is installed on welding support frame, and overturning welding assembly drives steel box limiting adjustment assembly to move, and adjusts and limits steel box by steel box limiting adjustment assembly.

[0010] Further, one side of the welding support frame is fixedly provided with a support annular plate, and a turnover welding assembly is installed on the support annular plate.

[0011] Further, the turnover welding assembly comprises a first electric cylinder which is fixedly installed on the support annular plate.

[0012] A movable welding support plate is fixedly installed on the first electric cylinder.

[0013] A welding support plate frame is movably installed on the movable welding support plate.

[0014] Further, the first electric cylinder drives the movable welding support plate to move, and the movable welding support plate drives the welding support plate frame to move.

[0015] Further, a welding device is fixedly installed on the welding support plate frame, and the welding device is used for welding the steel box.

[0016] Further, the turnover driving assembly comprises a second electric cylinder which is also fixedly installed on the support annular plate.

[0017] A driving rack is fixedly installed on the second electric cylinder, and the second electric cylinder drives the driving rack to move.

[0018] Further, a turnover gear is fixedly installed on the welding support plate frame, and when the turnover gear is engaged with the driving rack, the driving rack drives the turnover gear to rotate, thereby realizing turnover of the welding support plate frame.

[0019] Further, the turnover locking assembly comprises a movable assembly rod which is movably installed on the movable welding support plate.

[0020] A limiting strip plate is also movably installed on the movable welding support plate and movably connected with the movable assembly rod, and the movable assembly rod drives the limiting strip plate to move.

[0021] Further, a limiting gear block is fixedly installed on the limiting strip plate, and when the limiting gear block is engaged with the turnover gear, the limiting gear block fixes the turnover gear, thereby ensuring stability of the welding support plate frame.

[0022] Further, the steel box limiting and adjusting assembly comprises a limiting and matching frame which is matched with the movable welding support plate, and the movable welding support plate drives the limiting and matching frame to move, thereby limiting and adjusting the steel box from the end of the steel box.

[0023] The limiting and matching batten is movably installed on the limiting and matching frame, and is moved by the limiting and matching frame to adjust and limit the steel box from both sides.

[0024] Compared with the prior art, the present application has the advantages of reasonable structure and strong functionality, and has the following advantages:

[0025] 1. When butt welding the steel box, only one turnover of the steel box is needed to complete the circumferential welding of the butt joint of the steel box, without the need for multiple turnover operations, which is very convenient, greatly reduces the working intensity of the workers, and greatly improves the working efficiency of the steel box welding.

[0026] 2. The welder is installed on the welding support plate frame, and the position of the welder can be changed by turning over the welding support plate frame when welding the steel box, so that it can be turned over from above the steel box to below the steel box to complete the symmetrical welding of the steel box. The number of times of turning over the steel box is reduced by turning over the welding support plate frame, and the steel box is conveniently welded, which is efficient and easy to operate.

[0027] 3. In addition, when the welding support plate frame moves the welder, it can also move the limiting and matching frame, so that the limiting and matching frame can limit the steel box from the end, and with the movement of the limiting and matching frame, it can move the limiting and matching batten, so that the limiting and matching batten can limit the steel box from both sides, without the need for the workers to adjust the position of the steel box. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 First perspective view of the support work chassis assembly.

[0029] Figure 2 Second perspective view of the support work chassis assembly.

[0030] Figure 3 Structure diagram of the support work chassis.

[0031] Figure 4 First perspective view of the movable welding support plate assembly.

[0032] Figure 5 Second perspective view of the movable welding support plate assembly.

[0033] Figure 6 Cooperation diagram of the welding support plate frame and the driving rack.

[0034] Figure 7 Structure diagram of the movable welding support plate.

[0035] Figure 8 Structure diagram of the limiting batten.

[0036] Figure 9 It is an assembly diagram of the limiting fitting frame and the limiting fitting strip.

[0037] Figure 10 It is a structural diagram of the limiting fitting frame.

[0038] In the figure: 1, support work chassis; 11, welded support frame; 12, support rotating roller; 13, assembly vertical plate; 14, assembly guide rod; 15, assembly connecting frame; 16, support annular plate; 17, fitting channel; 171, channel inner bearing rod; 18, fitting bearing plate; 181, limiting strip; 182, support sliding rod; 2, first electric cylinder; 3, moving welded bearing plate; 31, first assembly hole; 32, second assembly hole; 33, bearing fitting rod; 34, linkage support strip plate; 35, moving fitting hole; 36, pushing fitting inclined surface; 4, welded support plate frame; 41, welder; 42, plate frame support shaft; 43, bearing; 44, overturning gear; 5, second electric cylinder; 6, driving rack; 61, installation connecting plate; 62, sliding fitting hole; 7, movable assembly rod; 71, fitting bearing block; 72, first fitting spring; 73, first linkage fitting rod; 74, limiting strip plate; 75, lateral bearing plate; 76, limiting tooth block; 77, support guide hole; 78, lateral connecting plate; 8, limiting fitting frame; 81, first fitting rotating wheel; 82, assembly guide hole; 83, second fitting spring; 84, upper convex bearing plate; 85, fitting bearing rod; 86, linkage fitting strip plate; 87, installation bearing frame; 88, second fitting rotating wheel; 9, limiting fitting strip; 91, third fitting rotating wheel; 92, fitting movable hole; 93, linkage connecting frame; 94, second linkage fitting rod. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0040] The present application provides a technical solution:

[0041] As Figure 1 , Figure 2 and Figure 3As shown, a coating-free weather-resistant steel box arch bridge tilting and welding device includes: a supporting working base frame 1, a tilting and welding assembly, a tilting and driving assembly, a tilting and locking assembly, and a steel box limit adjustment assembly. A welding support frame 11 is symmetrically welded and fixed on the supporting working base frame 1. A support roller 12 is installed on the welding support frame 11. The support roller 12 supports the steel box during welding, facilitating its movement and position adjustment. The tilting and welding assembly is installed on one side of the welding support frame 11 for welding the steel box. The tilting and driving assembly... The moving component works in conjunction with the flip welding component to drive the flip welding component to flip. The flip welding component can reduce the number of times the steel box needs to be flipped. The flip locking component is installed on the flip welding component to lock it and ensure the stability of the flip welding component when welding the steel box, thereby ensuring the smooth progress of the welding work. The steel box limit adjustment component is installed on the welding support frame 11. The flip welding component drives the steel box limit adjustment component to move. By adjusting the limit of the steel box through the steel box limit adjustment component, the steel box can be smoothly connected without the need for personnel to make adjustments, which is very convenient.

[0042] like Figure 1 and Figure 3 As shown, a support ring plate 16 is welded and fixed on one side of the welding support frame 11 by welding process. A flip welding assembly is installed on the support ring plate 16. Specifically, the flip welding assembly includes: a first electric cylinder 2, a movable welding support plate 3 and a welding support plate frame 4. The first electric cylinder 2 can be fixedly installed on the inner end face of the support ring plate 16 by screws. The movable welding support plate 3 can also be fixedly connected to the cylinder rod on the first electric cylinder 2 by screws.

[0043] like Figure 4 , Figure 6 and Figure 7 As shown, the welding support plate frame 4 is movably mounted on the movable welding support plate 3. Specifically, a first assembly hole 31 is provided on the movable welding support plate 3. A plate support shaft 42 is welded and fixed to the lower end of the welding support plate frame 4 by welding process. A bearing 43 is sleeved on the plate support shaft 42. The bearing 43 is installed in the first assembly hole 31. The welding support plate frame 4 can be movably mounted on the movable welding support plate 3 through the cooperation between the bearing 43 and the first assembly hole 31. The welding support plate frame 4 can be flipped.

[0044] like Figure 1 As shown, when the cylinder rod on the first electric cylinder 2 extends and retracts, it can drive the moving welding support plate 3 to move, and in turn, the moving welding support plate 4 can be driven to move by the moving welding support plate 3.

[0045] Furthermore, such as Figure 6As shown, the welding device 41 is fixedly installed on the welding support frame 4 by screws, and when the welding support frame 4 is moved along with the welding support plate 3 to the butt joint of the steel box, the welding device 41 can weld the butt joint of the steel box.

[0046] In addition, as shown in Figure 2 , Figure 3 and Figure 7 , in order to further ensure the stability of the movable welding support plate 3 during movement, a matching channel 17 is symmetrically provided at both ends of the support ring plate 16, and a channel inner support rod 171 is fixedly welded in the matching channel 17 by welding process. The surface of the channel inner support rod 171 is smooth and free of burrs, and a linkage support strip 34 is symmetrically welded at both ends of the lower side of the movable welding support plate 3 by welding process. The linkage support strip 34 is provided with a moving matching hole 35, and the inner wall of the moving matching hole 35 is smooth and free of burrs. The channel inner support rod 171 is inserted into the moving matching hole 35. Through the cooperation of the moving matching hole 35 and the channel inner support rod 171, the movable welding support plate 3 can be further supported, thereby ensuring its stability during movement.

[0047] As shown in Figure 2 , Figure 3 and Figure 6 , the turnover driving assembly comprises a second electric cylinder 5 and a driving rack 6. A matching load-bearing plate 18 is symmetrically welded and fixed at the upper end of the support ring plate 16 by welding process. A limiting plate strip 181 and a support slide rod 182 are fixedly welded between the matching load-bearing plates 18 by welding process. The surface of the support slide rod 182 is smooth and free of burrs. The second electric cylinder 5 is fixedly installed on one of the matching load-bearing plates 18 on the support ring plate 16 by screws.

[0048] One end of the driving rack 6 is integrally formed with a mounting connecting plate 61 fixedly arranged on the side surface. The mounting connecting plate 61 is fixedly installed on the cylinder rod of the second electric cylinder 5 by screws. The driving rack 6 can be moved by the extension and retraction of the cylinder rod of the second electric cylinder 5. In addition, in order to ensure the stability of the driving rack 6 during movement, a sliding matching hole 62 is also provided on the driving rack 6. The inner wall of the sliding matching hole 62 is smooth and free of burrs. The support slide rod 182 is inserted into the sliding matching hole 62. Through the cooperation of the support slide rod 182 and the sliding matching hole 62, the driving rack 6 can be supported, so that the driving rack 6 can only move along the support slide rod 182, further improving the stability of the driving rack 6 during movement.

[0049] As shown in Figure 6As shown, the end of the rack support shaft 42 on the welding support rack 4 away from the welding support rack 4 is provided with a turnover gear 44 by a welding process, when the turnover gear 44 is engaged with the driving rack 6, the second electric cylinder 5 can drive the driving rack 6 to move through the extension and retraction of the cylinder rod, and then the turnover gear 44 can be driven to rotate through the driving rack 6, realizing the turnover of the welding support rack 4, with the turnover of the welding support rack 4, the welder 41 on the welding support rack 4 can be turned to the upper side of the steel box or the lower side of the steel box, so that the symmetrical welding can be facilitated.

[0050] As Figure 4 、 Figure 5 、 Figure 7 and Figure 8 shown, the turnover locking assembly includes: a movable assembly rod 7 and a limiting strip plate 74, the movable assembly rod 7 is movably installed on the movable welding support plate 3, specifically, a second assembly hole 32 is also provided on the movable welding support plate 3, the second assembly hole 32 is located on the lower side of the first assembly hole 31, the movable assembly rod 7 is inserted into the second assembly hole 32, and a matching block 71 is welded and fixed at one end of the movable assembly rod 7, and a first matching spring 72 is also sleeved on the movable assembly rod 7, both ends of the first matching spring 72 are welded and fixed on the matching block 71 and the movable welding support plate 3 respectively, through the setting of the first matching spring 72, the stability of the movable assembly rod 7 can be realized, so that it can maintain a stable state on the movable welding support plate 3.

[0051] In addition, a supporting matching rod 33 is welded and fixed on one end of the movable welding support plate 3 close to the second electric cylinder 5 by a welding process, a supporting guide hole 77 is provided on the lower side of the limiting strip plate 74, the supporting matching rod 33 is inserted into the supporting guide hole 77, the limiting strip plate 74 is movably installed on the movable welding support plate 3 through the cooperation of the supporting matching rod 33 and the supporting guide hole 77, the first link matching rod 73 is hinged on the matching block 71, the lateral connecting plate 78 is integrally formed and fixedly provided at the lower end of the limiting strip plate 74, the other end of the first link matching rod 73 is hinged with the lateral connecting plate 78 on the limiting strip plate 74, through the hinge of the first link matching rod 73 and the lateral connecting plate 78, the movable assembly rod 7 and the movable assembly rod 7 are movably connected, and the limiting strip plate 74 is moved through the movable assembly rod 7.

[0052] A lateral support plate 75 is integrally formed and fixed on one side of the limiting strip plate 74, a limiting tooth block 76 is welded and fixed on the lateral support plate 75 by a welding process, when the limiting tooth block 76 is engaged with the turnover gear 44, it plays a fixed role for the turnover gear 44, and then ensures the stability of the welding support rack 4, so that it will not rotate during the welding process of the steel box, ensuring the smooth progress of the welding work.

[0053] AsFigure 1 、 Figure 3 、 Figure 9 and Figure 10 As shown in the figure, the steel box limiting adjustment assembly comprises a limiting fitting frame 8 and a limiting fitting strip 9. In order to realize the installation of the limiting fitting frame 8, assembly guide holes 82 are symmetrically arranged on the limiting fitting frame 8. Assembly vertical plates 13 are symmetrically welded on both sides of the welding support frame 11 through the welding process. Assembly guide rods 14 are fixedly welded on the assembly vertical plates 13 through the welding process. Assembly connecting frames 15 are also fixedly welded on the assembly vertical plates 13 on the upper side of the assembly guide rods 14 through the welding process. The assembly guide holes 82 are matched with the assembly guide rods 14 on the assembly vertical plates 13. The limiting fitting frame 8 is supported through the matching of the assembly guide holes 82 and the assembly guide rods 14. Second matching springs 83 are sleeved on the assembly guide rods 14. The two ends of the second matching springs 83 are respectively fixedly welded on the assembly vertical plates 13 and the limiting fitting frame 8. Through the arrangement of the second matching springs 83, the stability of the limiting fitting frame 8 can be ensured, and the resetting of the limiting fitting frame 8 can also be realized.

[0054] In addition, as shown in the figure, Figure 2 and Figure 9 A pushing matching inclined surface 36 is integrally formed on the linkage support strip plate 34. The surface of the pushing matching inclined surface 36 is smooth and free of burrs. A connecting matching strip plate 86 is integrally and fixedly arranged on the lower side of the limiting fitting frame 8. An installation support frame 87 is fixedly welded on the lower side of the connecting matching strip plate 86 through the welding process. A second matching rotating wheel 88 is installed on the installation support frame 87. The second matching rotating wheel 88 is in contact with the pushing matching inclined surface 36. The limiting fitting frame 8 is matched with the movable welding support plate 3 through the contact of the two. When the movable welding support plate 3 moves towards the welding support frame 11, the second matching rotating wheel 88 is pushed to move under the action of the pushing matching inclined surface 36. The limiting fitting frame 8 can be moved by the movable welding support plate 3. A first matching rotating wheel 81 is also installed on the limiting fitting frame 8. When the limiting fitting frame 8 moves under the action of the movable welding support plate 3, the first matching rotating wheel 81 is in contact with the end of the steel box. The limiting of the steel box can be adjusted from the end of the steel box under the action of the first matching rotating wheel 81.

[0055] The limiting fitting batten 9 is movably installed on the limiting fitting frame 8. Specifically, two limiting fitting battens 9 are symmetrically installed on each limiting fitting frame 8, and are respectively located on the two sides of the steel box. An upper convex bearing plate 84 is integrally formed on the upper end of the limiting fitting frame 8 on both sides, and a fitting bearing rod 85 is welded and fixed between the upper convex bearing plates 84 by a welding process. A fitting movable hole 92 is formed at one end of the limiting fitting batten 9, and the fitting bearing rod 85 is inserted into the fitting movable hole 92. The limiting fitting batten 9 is supported through the cooperation of the fitting bearing rod 85 and the fitting movable hole 92. An interconnection 93 is welded and fixed on the limiting fitting batten 9 by a welding process. A second interconnection fitting rod 94 is hinged to the interconnection 93. The other end of the second interconnection fitting rod 94 is hinged to the assembly connection frame 15 adjacent thereto. When the limiting fitting frame 8 moves, the limiting fitting batten 9 is driven to move by the limiting fitting frame 8 under the action of the second interconnection fitting rod 94. A third fitting rotating wheel 91 is installed on the limiting fitting batten 9. When the two limiting fitting battens 9 on the same limiting fitting frame 8 move towards each other, the third fitting rotating wheel 91 on the limiting fitting batten 9 contacts the side surface of the steel box. Thus, the steel box can be adjusted and limited from both sides.

[0056] When the steel boxes are butt-welded, the two steel boxes are placed on the two welding support frames 11. At this time, the turnover gear 44 is engaged with the driving rack 6, and the limiting tooth block 76 is separated from the turnover gear 44. The fitting bearing block 71 is in contact with the limiting batten 181. At this time, the first fitting spring 72 is in a compressed state. The first electric cylinder 2 is started to drive the movable welding support plate 3 to move towards the welding support frame 11. With the movement of the movable welding support plate 3, the turnover gear 44 is separated from the driving rack 6. With the movement of the movable welding support plate 3, the fitting bearing block 71 remains stationary because the first fitting spring 72 is in a compressed state. Thus, the distance between the fitting bearing block 71 and the movable welding support plate 3 becomes larger until the first fitting spring 72 returns to its original length. Then, with the movement of the movable welding support plate 3, the fitting bearing block 71 is synchronously moved. At this time, the distance between the fitting bearing block 71 and the movable welding support plate 3 remains stable.

[0057] In this process, the limiting strip plate 74 is moved under the action of the first interconnection fitting rod 73, so that the limiting tooth block 76 is engaged with the turnover gear 44. Before the turnover gear 44 is completely separated from the driving rack 6, the limiting tooth block 76 has been engaged with the turnover gear 44. Thus, the stability of the turnover gear 44 is ensured under the action of the limiting tooth block 76, so that the turnover gear 44 does not rotate. The stability of the welding support plate frame 4 is ensured, and the upper side of the steel box can be welded by the welding device 41.

[0058] In addition, with the movement of the mobile welding support plate 3 to the welding support frame 11, the limiting fitting frame 8 is moved under the action of the pushing fitting slope 36, and then the limiting fitting frame 8 is adjusted and limited from the end of the steel box, and with the movement of the limiting fitting frame 8, the two limiting fitting strips 9 on the limiting fitting frame 8 are moved towards each other under the action of the second connecting fitting rod 94, and the steel box can be adjusted and limited from both sides, and the automatic alignment of the steel box can be realized without manual adjustment, which is very convenient and fast.

[0059] When the adjustment of the steel box is completed, the butt joint of the steel box is welded with the movement of the mobile welding support plate 3, and after the completion of the welding, the first electric cylinder 2 is started to drive the mobile welding support plate 3 to move reversely, and in the process of the reverse movement, the limiting fitting frame 8 is reset under the action of the second fitting spring 83, the limiting fitting strip 9 is released to the steel box, and then with the movement of the mobile welding support plate 3, the fitting support block 71 is in contact with the limiting strip 181, so that the fitting support block 71 cannot move under the limitation of the limiting strip 181, and the distance between the fitting support block 71 and the mobile welding support plate 3 becomes smaller.

[0060] In this way, the limiting strip plate 74 is moved under the action of the first connecting fitting rod 73, the limiting tooth block 76 is separated from the turnover gear 44, and before the complete separation of the two, the turnover gear 44 is meshed with the driving rack 6, and the driving rack 6 can be used to limit the turnover gear 44, until the limiting tooth block 76 is completely separated from the turnover gear 44, and then the second electric cylinder 5 is started to drive the driving rack 6 to move, and then the turnover gear 44 is rotated, the turnover of the welding support plate frame 4 is realized, the welding device 41 is turned to the lower side of the steel box, and then the mobile welding support plate 3 is driven to move to the welding support frame 11, and the welding work on the lower side of the steel box is realized, and the symmetrical welding is realized.

[0061] After the welding is completed, the steel box is turned over, one of the other two welding surfaces is upward, and the other is downward, and the repeated welding operation is performed again to complete the welding of the steel box, that is, only one side of the steel box is turned over to complete the circumferential welding, the operation is simple, convenient and fast, and very practical, and after the welding is completed, the driving rack 6 is reset by the second electric cylinder 5.

[0062] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A coating-free weathering steel box girder arch bridge flipping and welding device, characterized in that: include: A supporting working base frame is provided, on which welding support frames are symmetrically fixed, and support rollers are installed on the welding support frames. The support rollers are used to support the steel box during welding. A flip welding assembly, which is installed on one side of a welding support frame, is used for welding steel boxes; The flip welding assembly includes: a first electric cylinder, a movable welding plate, and a welding support plate frame. The first electric cylinder is fixedly mounted on the support ring plate, the movable welding plate is fixedly mounted on the first electric cylinder, and the welding support plate frame is movably mounted on the movable welding plate. A flipping drive assembly, which cooperates with a flipping welding assembly to drive the flipping welding assembly to flip; The flipping drive assembly includes a second electric cylinder and a drive rack. The second electric cylinder is also fixedly mounted on the support ring plate, and the drive rack is fixedly mounted on the second electric cylinder. The second electric cylinder drives the drive rack to move. A flip-locking assembly is installed on the flip-welding assembly and locked to ensure the stability of the flip-welding assembly when welding the steel box. The flip-locking assembly includes a movable assembly rod and a limiting plate. The movable assembly rod is movably mounted on the movable welding support plate, and the limiting plate is also movably mounted on the movable welding support plate and is movably connected to the movable assembly rod. The movable assembly rod drives the limiting plate to move. A steel box limit adjustment assembly is installed on a welding support frame. The rotating welding assembly drives the steel box limit adjustment assembly to move, thereby adjusting and limiting the steel box. The steel box limiting adjustment assembly includes: a limiting mating frame and a limiting mating strip. The limiting mating frame cooperates with the movable welding support plate. The movable welding support plate drives the limiting mating frame to move, thereby adjusting and limiting the steel box from the end. The limiting and fitting strip is movably installed on the limiting and fitting frame, and is moved by the limiting and fitting frame to adjust and limit it from both sides of the steel box.

2. The uncoated weathering steel box girder arch bridge flipping and welding device according to claim 1, characterized in that: A support ring plate is fixedly installed on one side of the welding support frame, and a flip welding assembly is installed on the support ring plate.

3. The uncoated weathering steel box girder arch bridge flipping and welding device according to claim 2, characterized in that: The first electric cylinder drives the movable welding plate to move, and the movable welding plate drives the welding support frame to move.

4. The uncoated weathering steel box girder arch bridge flipping and welding device according to claim 3, characterized in that: A welding device is fixedly installed on the welding support plate frame, and the welding of the steel box is achieved by the welding device.

5. The uncoated weathering steel box girder arch bridge flipping and welding device according to claim 4, characterized in that: A flipping gear is fixedly installed on the welding support plate frame. When the flipping gear meshes with the drive rack, the drive rack drives the flipping gear to rotate, thereby realizing the flipping of the welding support plate frame.

6. The uncoated weathering steel box girder arch bridge flipping and welding device according to claim 5, characterized in that: The limiting strip is fixedly provided with a limiting tooth block. When the limiting tooth block meshes with the flip gear, it plays a role in fixing the flip gear, thereby ensuring the stability of the welded support plate frame.

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