Steel structure rib plate welding device

Abstract

The invention relates to the technical field of steel structure welding, in particular to a steel structure rib plate welding device which comprises two connecting bottom plates, power telescopic frames are installed on the upper surfaces of the two connecting bottom plates, and the two power telescopic frames are connected through two detachable supporting structures. And a plurality of material pressing structures are inserted between the two detachable supporting structures in a sliding manner. By arranging the transverse plate, the upper pressing plate, the side clamping plates and other components, when the power telescopic frame shrinks, the transverse frame is driven by the detachable supporting structure to move downwards, the transverse plate enables the lower ends of the two side clamping plates to make contact with the two sides of the U-shaped rib plate firstly through the upper pressing plate elastically connected, and then when the transverse frame continues to move downwards, the two side clamping plates make contact with the two sides of the U-shaped rib plate; the two side clamping plates gradually move upwards relative to the upper pressing plate under blocking of the rib plate, after the upper pressing plate moves downwards to make contact with the upper surface of the rib plate, the upper pressing plate tightly presses the upper surface of the rib plate, meanwhile, the two side clamping plates limit the two sides of the rib plate, and transverse displacement generated in the welding process of the rib plate is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure welding, and in particular to a steel structure rib plate welding device. Background Art

[0002] Plasma welding technology is a method of welding by using a plasma arc as a heat source. Orthotropic steel bridge decks, which have the advantages of light weight, large load-bearing capacity, and short construction period, have been widely used in the construction of steel bridges. Especially in kilometer-level cross-river, cross-sea, and cross-ocean bridges, their technical advantages are more prominent. However, due to the stress concentration effects caused by local wheel loads and structural details in orthotropic steel bridge decks, various fatigue cracking problems are relatively prominent. Among them, the root cracks that are likely to occur in the weld between the U-shaped rib plate and the deck have received wide attention. When welding, the rib plate is placed on the deck to be connected for welding.

[0003] Chinese Patent Publication No. CN116237621A discloses a steel structure bridge U-rib welding device and welding process, including: a welding system and a pretreatment system. The U-rib is welded through the welding system; the pretreatment system includes an internal treatment system and an external treatment system; the internal treatment system includes a mobile trolley, a seat body, and a first feeding mechanism; the seat body is a hollow structure fixed on the base of the mobile trolley, and the first feeding mechanisms are symmetrically arranged on the left and right sides of the seat body to feed the inner groove of the U-rib through the first feeding mechanism; the external treatment system includes a mobile gantry structure and a second feeding mechanism; the second feeding mechanism is used to feed the outer weld of the U-rib. This invention adopts a full penetration welding and pretreatment process to improve the overall quality of the steel bridge deck. The above-related technologies have the following defects: In the prior art, when welding the rib plate, generally only the upper part of the rib plate is pressed and fixed. When the rib plate is subjected to a lateral force, the rib plate is prone to displacement, resulting in misalignment between the rib plate and the steel bridge deck after welding. Therefore, a steel structure rib plate welding device is proposed. Summary of the Invention

[0004] In order to prevent the rib plate from being misaligned when welding with the steel bridge deck, the present invention provides a steel structure rib plate welding device.

[0005] A steel structure rib plate welding device provided by the present invention adopts the following technical solution: including a connecting bottom plate, the number of the connecting bottom plates is two, power telescopic frames are installed on the upper surfaces of the two connecting bottom plates, the two power telescopic frames are connected by two detachable support structures, and a plurality of pressing structures are slidably inserted between the two detachable support structures.

[0006] The blanking structure includes a cross frame and an elastic telescopic frame. The upper end of the elastic telescopic frame is fixed to the cross frame. The two ends of the cross frame are respectively slidably connected to two detachable support structures. A cross plate is fixed to the lower end of the elastic telescopic frame. An upper pressing plate is arranged below the cross plate. The upper pressing plate is elastically connected to the cross plate. Side clamping plates are slidably inserted at both ends of the upper pressing plate. The two side clamping plates are distributed in an inverted V shape. The side clamping plates are slidably connected to the upper pressing plate.

[0007] Optionally, one of the two power telescopic frames has a power winding cylinder rotatably connected to one side of the upper end away from the adjacent blanking structure. A pulling rope is wound around the circumferential side of the power winding cylinder. The pulling rope slidably penetrates through the upper end of the adjacent power telescopic frame. One end of the pulling rope between the two power telescopic frames is fixed to the adjacent cross frame. A winding wheel is elastically rotatably connected to the upper surface of the cross frame. A fixed-distance rope is wound around the circumferential side of the winding wheel. The lower end of the fixed-distance rope slidably penetrates through the upper surface of the cross frame and then exits from the front of the cross frame. One of the two power telescopic frames away from the power winding cylinder is fixed to the adjacent fixed-distance rope. The cross frame is detachably connected to the adjacent rear fixed-distance rope.

[0008] Optionally, a threaded rod is fixed at the axis of the winding wheel. A threaded cylinder is threadedly sleeved on the outer surface of the threaded rod. A track telescopic rod is arranged in parallel below the threaded cylinder. The two ends of the track telescopic rod are respectively fixed to the adjacent lower cross frame and the adjacent upper threaded cylinder.

[0009] Optionally, the detachable support structure includes two end frames and a plurality of side frames. One end of the two end frames away from each other is respectively fixed to the upper ends of the two power telescopic frames. One end of the two end frames close to each other is respectively slidably connected to the adjacent side frame. The side frames are slidably connected to the adjacent side frame. One end of the side frame is a protruding plate-like structure, and the other end of the side frame is a groove-like structure. The end frame and the connected side frame and between every two adjacent side frames are detachably connected by a clamping block. The two ends of the cross frame are respectively slidably connected to the adjacent side frame. One end of the side frame close to the cross frame is a groove-like structure in a matching manner.

[0010] Optionally, a steering wheel is rotatably connected inside the cross frame. The fixed-distance rope bypasses below the steering wheel. The lower end of the fixed-distance rope is horizontal, and the upper end of the fixed-distance rope is vertical.

[0011] Optionally, an intermediate top plate is arranged above each side frame on the right side of the cross frame. A side end top plate is arranged above each end frame on the right side of the cross frame. The side end top plate is slidably connected to the adjacent intermediate top plate. The two adjacent intermediate top plates are slidably connected. One end of the intermediate top plate is a convex structure, and the other end of the intermediate top plate is a groove-like structure. A bent telescopic rod A is fixed to the right side surface of the intermediate top plate. The other end of the bent telescopic rod A is fixed to the adjacent lower side frame. A bent telescopic rod B is fixed to the right side surface of the side end top plate. The other end of the bent telescopic rod B is fixed to the adjacent lower end frame. Synchronous power telescopic rods are fixed to one end of the two end frames away from each other. The two synchronous power telescopic rods are respectively fixed to the upper ends of the two power telescopic frames.

[0012] Optionally, a toothed plate is slidably inserted on the upper surface of the upper pressing plate. Hinged plates are rotatably connected to the mutually approaching surfaces of the two toothed plates. The upper ends of the hinged plates are rotatably connected to the cross plates above. Tooth grooves are formed on the mutually approaching surfaces of the two side clamping plates connected to the same upper pressing plate.

[0013] Optionally, a vertical frame is fixed to the front surface of the upper pressing plate. A slider is slidably inserted inside the vertical frame. A gear is rotatably connected to the back surface of the slider. Tooth plates are engaged with both the upper and lower sides of the gear. The ends of the two tooth plates away from the gear are respectively fixed to the two side clamping plates.

[0014] Optionally, a plasma welding head is arranged between the two power telescopic frames. The plasma welding head is equipped with a controllable frame that can be telescopically rotated. The upper end of the controllable frame that can be telescopically rotated is slidably inserted into the bottom surface of the adjacent side frame.

[0015] In summary, the present invention includes the following beneficial technical effects:

[0016] 1. By arranging components such as cross plates, upper pressing plates, and side clamping plates, when the power telescopic frame contracts, the cross frame is driven to move downward through the detachable support structure. The cross plate and the elastic telescopic frame move synchronously with the cross frame. The cross plate makes the lower ends of the two side clamping plates contact the two sides of the U-shaped rib plate first through the elastically connected upper pressing plate. Then, during the continuous downward movement of the cross frame, the two side clamping plates gradually move upward relative to the upper pressing plate under the block of the rib plate. After the upper pressing plate moves downward to contact the upper surface of the rib plate, the upper pressing plate presses the upper surface of the rib plate, and at the same time, the two side clamping plates limit the two sides of the rib plate to prevent lateral displacement during the welding of the rib plate.

[0017] 2. By arranging components such as tooth grooves, hinged plates, and toothed plates, after the upper pressing plate contacts the rib plate and the cross plate continues to move downward, the cross plate gradually approaches the upper pressing plate. The toothed plate is pushed to gradually move away from the axis of the upper pressing plate through the hinged plate. After the toothed plate meshes with the tooth groove during continuous movement, the position of the side clamping plate relative to the upper clamping plate is fixed, enabling the side clamping plate to stably limit the two side surfaces of the rib plate.

[0018] 3. The present invention sets components such as a draw rope, a threaded cylinder, a fixed-distance rope, and an intermediate top plate. The synchronous power telescopic rod controls the distance between the intermediate top plate and the threaded cylinder through expansion and contraction. Before pressing and fixing the rib plate, the power rotates around the cylinder to wind the draw rope, and the draw rope pulls the connected cross frame to move. When the cross frame moves away from the adjacent cross frame, the corresponding fixed-distance rope is pulled out from the surface of the winding wheel to drive the connected threaded rod to rotate. The threaded cylinder gradually approaches the adjacent intermediate top plate through meshing with the threaded rod. When the threaded cylinder contacts the intermediate top plate, the winding wheel stops rotating, so that the fixed-distance rope is limited to the distance pulled out from the winding wheel, thereby limiting the distance between two adjacent cross frames. When the fixed-distance ropes between all cross frames are pulled out from the winding wheel, the distance between each two adjacent cross frames is limited, so that the corresponding upper pressing plate and side clamping plate below uniformly apply a limit to the rib plate at equal distances, ensuring uniform stress on the rib plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure in an embodiment of the present invention;

[0020] Figure 2 is a schematic top view structure diagram in an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the structure where the side end top plate is connected to the synchronous power telescopic rod in an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of the structure where the cross frame is connected to the side frame in an embodiment of the present invention;

[0023] Figure 5 is in an embodiment of the present invention Figure 3 is an enlarged schematic diagram of the structure at A in

[0024] Figure 6 is a schematic diagram of the structure where the cross plate is connected to the elastic telescopic frame in an embodiment of the present invention;

[0025] Figure 7 is a schematic front view of a partial structure in an embodiment of the present invention;

[0026] Figure 8 is a schematic diagram of the structure where the threaded rod is connected to the threaded cylinder in an embodiment of the present invention;

[0027] Figure 9 is a schematic diagram of the structure where the upper pressing plate is connected to the side clamping plate in an embodiment of the present invention.

[0028] Reference numerals: 1, connecting bottom plate; 2, retractable and rotatable control frame; 3, power telescopic frame; 4, detachable support structure; 41, end frame; 42, side frame; 421, middle top plate; 422, side end top plate; 423, bent telescopic rod A; 424, bent telescopic rod B; 425, synchronous power telescopic rod; 43, clamping block; 5, material pressing structure; 51, cross frame; 52, elastic telescopic frame; 53, cross plate; 54, upper pressing plate; 541, tooth inserting plate; 542, hinged plate; 543, tooth groove; 544, vertical frame; 545, gear; 546, slider; 547, tooth plate; 55, side clamping plate; 6, power winding drum; 7, pull rope; 8, fixed-distance rope; 9, winding wheel; 10, threaded rod; 11, track telescopic rod; 12, threaded barrel; 13, steering wheel; 14, plasma welding head. Detailed implementation mode

[0029] The following will further describe the present invention in detail with reference to the Figures 1 - 9 accompanying drawings.

[0030] An embodiment of the present invention discloses a steel structure rib plate welding device. As Figures 1 - 9 shown, it includes a connecting bottom plate 1. The number of connecting bottom plates 1 is two. Power telescopic frames 3 are installed on the upper surfaces of the two connecting bottom plates 1. The two power telescopic frames 3 are connected by two detachable support structures 4. The power telescopic frame 3 can control the distance between the upper end of the power telescopic frame 3 and the connecting bottom plate 1 through power telescoping. The connecting bottom plate 1 is installed on both sides of the steel structure panel to be welded. A plurality of material pressing structures 5 are slidably inserted between the two detachable support structures 4.

[0031] The material pressing structure 5 includes a cross frame 51 and an elastic telescopic frame 52. The upper end of the elastic telescopic frame 52 is fixed to the cross frame 51. Both ends of the cross frame 51 are slidably connected to the two detachable support structures 4 respectively.

[0032] One of the two power telescopic frames 3 is rotatably connected to a power winding drum 6 on the side away from the adjacent material pressing structure 5. A pull rope 7 is wound around the circumferential side of the power winding drum 6. The pull rope 7 slidably penetrates through the upper end of the adjacent power telescopic frame 3. One end of the pull rope 7 between the two power telescopic frames 3 is fixed to the adjacent cross frame 51. The power winding drum 6 is equipped with a motor. When the power winding drum 6 rotates, it can wind the pull rope 7 and pull the connected cross frame 51 to move.

[0033] An unwinding wheel 9 is elastically rotatably connected to the upper surface of the cross frame 51. A fixed-distance rope 8 is wound and connected to the circumferential side surface of the unwinding wheel 9. The lower end of the fixed-distance rope 8 slidably penetrates through the upper surface of the cross frame 51 and exits from the front surface of the cross frame 51. A threaded rod 10 is fixed at the axis of the unwinding wheel 9. A threaded cylinder 12 is threadedly sleeved on the outer surface of the threaded rod 10. A track telescopic rod 11 is arranged in parallel below the threaded cylinder 12. The two ends of the track telescopic rod 11 are respectively fixed to the adjacent lower cross frame 51 and the adjacent upper threaded cylinder 12. When the cross frame 51 is pulled and moved by the pulling rope 7, the fixed-distance rope 8 is gradually pulled out from the surface of the corresponding unwinding wheel 9, driving the unwinding wheel 9 to elastically store energy and rotate relative to the cross frame 51, driving the connected threaded rod 10 to rotate, and the threaded cylinder 12 meshes with the rotating threaded rod 10 and gradually moves away from the threaded cylinder 12. When the cross frame 51 is not subjected to the pulling force of the pulling rope 7, the energy-stored unwinding wheel 9 winds the fixed-distance rope 8.

[0034] The detachable support structure 4 includes two end frames 41 and a plurality of side frames 42. One end of the two end frames 41 away from each other is respectively fixed to the upper ends of the two power telescopic frames 3. One end of the two end frames 41 close to each other is respectively slidably connected to the adjacent side frame 42. The side frame 42 is slidably connected to the adjacent side frame 42. One end of the side frame 42 is a protruding plate-like structure, and the other end of the side frame 42 is a groove-like structure. The end frame 41 and the connected side frame 42 and between every two adjacent side frames 42 are detachably connected by a clamping block 43. According to the length of the welded panel, the number of side frames 42 is controlled to change the distance between the two power telescopic frames 3.

[0035] A plasma welding head 14 is arranged between the two power telescopic frames 3. The plasma welding head 14 is equipped with a telescopic and rotatable control frame 2. The upper end of the telescopic and rotatable control frame 2 is slidably inserted into the bottom surface of the adjacent side frame 42. The two ends of the cross frame 51 are respectively slidably connected to the adjacent side frame 42. One end of the side frame 42 close to the cross frame 51 is a groove-like structure in cooperation. The telescopic and rotatable control frame 2 can control the position of the plasma welding head 14 and control the plasma welding head 14 to weld the rib plate and the steel structure panel.

[0036] Above each side frame 42 on the right side of the cross frame 51, an intermediate top plate 421 is provided. Above each end frame 41 on the right side of the cross frame 51, a side end top plate 422 is provided. The side end top plate 422 is slidably connected to the adjacent intermediate top plate 421, and the adjacent two intermediate top plates 421 are slidably connected. One end of the intermediate top plate 421 is a convex structure, and the other end of the intermediate top plate 421 is a groove-like structure. A bent telescopic rod A 423 is fixed to the right side surface of the intermediate top plate 421, and the other end of the bent telescopic rod A 423 is fixed to the adjacent lower side frame 42. A bent telescopic rod B 424 is fixed to the right side surface of the side end top plate 422, and the other end of the bent telescopic rod B 424 is fixed to the adjacent lower end frame 41. Synchronous power telescopic rods 425 are fixed to the mutually remote ends of the two end frames 41. The two synchronous power telescopic rods 425 are respectively fixed to the upper ends of the two power telescopic frames 3. When the two synchronous power telescopic rods 425 expand and contract, they control the distance between the intermediate top plate 421 and the threaded cylinder 12 through the side end top plate 422. When the threaded cylinder 12 contacts the intermediate top plate 421, the winding wheel 9 stops rotating, so that the fixed-distance rope 8 is limited to the distance pulled out from the winding wheel 9, thereby limiting the distance between two adjacent cross frames 51. By controlling the distance between the intermediate top plate 421 and the threaded cylinder 12, the distance that the fixed-distance rope 8 is pulled out from the surface of the winding wheel 9 can be controlled, and further the distance between two adjacent cross frames 51 can be controlled.

[0037] One of the two power telescopic frames 3 that is far from the power winding cylinder 6 is fixed to the adjacent fixed-distance rope 8. The cross frame 51 is detachably connected to the adjacent rear fixed-distance rope 8. The number of cross frames 51 can be changed and inserted between the front and rear side frames 42. A steering wheel 13 is rotatably connected inside the cross frame 51. The fixed-distance rope 8 bypasses below the steering wheel 13. The lower end of the fixed-distance rope 8 is horizontal, and the upper end of the fixed-distance rope 8 is vertical. The steering wheel 13 limits the moving track of the fixed-distance rope 8.

[0038] The lower end of the elastic telescopic frame 52 is fixed with a cross plate 53. Below the cross plate 53, an upper pressing plate 54 is provided. The upper pressing plate 54 is elastically connected to the cross plate 53. Side clamping plates 55 are slidably inserted at both ends of the upper pressing plate 54. A vertical frame 544 is fixed to the front surface of the upper pressing plate 54. A slider 546 is slidably inserted inside the vertical frame 544. A gear 545 is rotatably connected to the back surface of the slider 546. Tooth plates 547 are engaged with both the upper and lower sides of the gear 545. The ends of the two tooth plates 547 far from the gear 545 are respectively fixed to the two side clamping plates 55. The two side clamping plates 55 are distributed in an inverted V shape. The side clamping plates 55 are slidably connected to the upper pressing plate 54. After the side clamping plates 55 are blocked when contacting the rib plate, they move relative to the upper pressing plate 54. The gear 545 makes the two engaged tooth plates 547 move synchronously, so that the two side clamping plates 55 move synchronously relative to the upper pressing plate 54, and the two side clamping plates 55 limit the two side surfaces of the rib plate symmetrically.

[0039] A toothed plate 541 is slidably inserted into the upper surface of the upper pressing plate 54. Hinged plates 542 are rotatably connected to the mutually approaching surfaces of the two toothed plate 541. The upper ends of the hinged plates 542 are rotatably connected to the adjacent upper cross plate 53. Tooth grooves 543 are formed in the mutually approaching surfaces of the two side clamping plates 55 connected to the same upper pressing plate 54. After the upper pressing plate 54 contacts the upper surface of the rib plate, when the cross plate 53 continues to move downward, the cross plate 53 drives the hinged plate 542 to rotate by approaching the upper pressing plate 54. When the hinged plate 542 rotates, it pushes the toothed plate 541 to engage with the tooth groove 543, fixing the relative positions of the side clamping plate 55 and the upper pressing plate 54, and stably limiting the side of the rib plate by the side clamping plate 55.

[0040] The working principle is as follows: The rib plate to be welded is placed between the two connecting bottom plates 1. The connecting bottom plates 1 are installed on both sides of the steel structure to be welded, so that the rib plate is located below the upper pressing plate 54. When the power telescopic frame 3 contracts, it drives the cross frame 51 to move downward through the detachable support structure 4. The cross plate 53 and the elastic telescopic frame 52 move synchronously with the cross frame 51. The cross plate 53 makes the lower ends of the two side clamping plates 55 contact the two sides of the U-shaped rib plate first through the elastically connected upper pressing plate 54. Then, during the continuous downward movement of the cross frame 51, the two side clamping plates 55 gradually move upward relative to the upper pressing plate 54 under the block of the rib plate. The two side clamping plates 55 apply pressure to the two sides of the rib plate. After the upper pressing plate 54 moves downward and contacts the upper surface of the rib plate, the upper pressing plate 54 presses the upper surface of the rib plate, and the rib plate can be stably welded.

[0041] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited accordingly. 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. A steel structure rib welding device, comprising a connecting bottom plate (1), characterized in that: There are two connecting base plates (1), the upper surfaces of the two connecting base plates (1) are both equipped with power telescopic frames (3), the two power telescopic frames (3) are connected via two detachable support structures (4), and a plurality of pressing structures (5) are slidably inserted between the two detachable support structures (4); The material pressing structure (5) comprises a cross frame (51) and an elastic telescopic frame (52), wherein the upper end of the elastic telescopic frame (52) is fixed to the cross frame (51), and the two ends of the cross frame (51) are respectively slidably connected to the two detachable supporting structures (4), and a cross plate (53) is fixed to the lower end of the elastic telescopic frame (52), and an upper pressing plate (54) is arranged below the cross plate (53), and the upper pressing plate (54) is elastically connected to the cross plate (53), and side clamping plates (55) are slidably inserted at both ends of the upper pressing plate (54), and the two side clamping plates (55) are distributed in an inverted eight-shaped shape, and the side clamping plates (55) are slidably connected to the upper pressing plate (54).

2. A steel structure rib welding device according to claim 1, characterized in that: One of the two power telescopic frames (3) has a power drum (6) at its upper end away from the adjacent material pressing structure (5) and is rotatably connected to the side surface thereof; a pull rope (7) is wound around the circumferential side surface of the power drum (6); the pull rope (7) slides through the upper end of the adjacent power telescopic frame (3); one end of the pull rope (7) is located between the two power telescopic frames (3) and is fixed to the adjacent cross frame (51); a winding wheel (9) is elastically rotatably connected to the upper surface of the cross frame (51); a distance rope (8) is wound around the circumferential side surface of the winding wheel (9); the lower end of the distance rope (8) slides through the upper surface of the cross frame (51) and then passes out from the front of the cross frame (51); one of the two power telescopic frames (3) away from the power drum (6) is fixed to the adjacent distance rope (8); and the cross frame (51) is detachably connected to the adjacent rear distance rope (8).

3. A steel structure rib welding device according to claim 2, characterized in that: A threaded rod (10) is fixed at the axis of the winding wheel (9), a threaded tube (12) is threadedly sleeved on the outer surface of the threaded rod (10), a track telescopic rod (11) is arranged parallel to the lower side of the threaded tube (12), and two ends of the track telescopic rod (11) are respectively fixed to the adjacent lower cross frame (51) and the adjacent upper threaded tube (12).

4. A steel structure rib welding device according to claim 3, characterized in that: The detachable support structure (4) comprises two end frames (41) and a plurality of side frames (42); the ends of the two end frames (41) that are away from each other are respectively fixed to the upper ends of the two power telescopic frames (3); the ends of the two end frames (41) that are close to each other are respectively slidably connected to the adjacent side frames (42); the side frames (42) are slidably connected to the adjacent side frames (42); one end of the side frame (42) is a protruding plate-like structure; the other end of the side frame (42) is a groove-like structure; the end frame (41) and the connected side frame (42) and each adjacent two side frames (42) are detachably connected via a clamping block (43); the two ends of the cross frame (51) are respectively slidably connected to the adjacent side frames (42); and the end of the side frame (42) close to the cross frame (51) is a matching groove-like structure.

5. A steel structure rib welding device according to claim 2, characterized in that: The cross frame (51) is rotatably connected to a steering wheel (13) inside, and the distance rope (8) passes under the steering wheel (13). The lower end of the distance rope (8) is horizontal, and the upper end of the distance rope (8) is vertical.

6. A steel structure rib welding device according to claim 4, characterized in that: An intermediate top plate (421) is disposed above each side frame (42) on the right side of the horizontal frame (51), and a side end top plate (422) is disposed above each end frame (41) on the right side of the horizontal frame (51). The side end top plate (422) is slidably connected to an adjacent intermediate top plate (421), and two adjacent intermediate top plates (421) are slidably connected. One end of the intermediate top plate (421) is a convex structure, and the other end of the intermediate top plate (421) is a groove structure. The right side surface of the intermediate top plate (421) is A bending telescopic rod A (423) is fixed, the other end of the bending telescopic rod A (423) is fixed to the adjacent lower side frame (42), a bending telescopic rod B (424) is fixed to the right side of the side end top plate (422), the other end of the bending telescopic rod B (424) is fixed to the adjacent lower end frame (41), and a synchronous power telescopic rod (425) is fixed to the ends of the two end frames (41) that are away from each other, and the two synchronous power telescopic rods (425) are respectively fixed to the upper ends of the two power telescopic frames (3).

7. A steel structure rib welding device according to claim 1, characterized in that: The upper surface of the upper pressing plate (54) is slidably plugged with a toothed plug plate (541), and the two toothed plug plates (541) are rotatably connected to the mutually adjacent sides with hinged plates (542), and the upper ends of the hinged plates (542) are rotatably connected to the adjacent upper transverse plate (53), and the two side clamping plates (55) connected to the same upper pressing plate (54) are provided with toothed grooves (543) on the mutually adjacent sides.

8. A steel structure rib welding device according to claim 1, characterized in that: A vertical frame (544) is fixed on the front of the upper pressure plate (54), a slider (546) is slidably inserted inside the vertical frame (544), a gear (545) is rotatably connected to the back of the slider (546), and tooth plates (547) are meshed on both the upper and lower sides of the gear (545), and the ends of the two tooth plates (547) away from the gear (545) are respectively fixed to the two side clamping plates (55).

9. A steel structure rib welding device according to claim 1, characterized in that: A plasma welding head (14) is arranged between the two power telescopic frames (3), and a telescopic and rotatable control frame (2) is installed on the plasma welding head (14). The upper end of the telescopic and rotatable control frame (2) is slidably inserted into the bottom surface of the adjacent side frame (42).

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