CN119188132A

CN119188132A - U rib plate welding device for bridge

Info

Publication number: CN119188132A
Application number: CN202411707192.XA
Authority: CN
Inventors: 王国福; 张恒; 李志远; 李明飞; 任爽; 丁锐
Original assignee: Huazhou Heavy Industry Co ltd
Current assignee: Huazhou Heavy Industry Co ltd
Priority date: 2024-11-27
Filing date: 2024-11-27
Publication date: 2024-12-27
Anticipated expiration: 2044-11-27
Also published as: CN119188132B

Abstract

The invention relates to the technical field of steel structure welding, and discloses a U rib plate welding device for a bridge, which comprises a portal frame, a bearing plate arranged below the portal frame, a welding assembly arranged on the portal frame, a bearing assembly arranged on the bearing plate, clamping assemblies arranged at two ends of the U rib plate, a pressure assembly tightly arranged above the U rib plate and used for pressing the U rib plate and a bottom plate, a blocking assembly arranged on the portal frame and used for blocking the pressure assembly, wherein when the bearing plate passes through the portal frame along the direction perpendicular to the portal frame, the welding assembly welds the U rib plate on the bottom plate, and the blocking assembly sequentially blocks a plurality of groups of pressure assemblies in front of the welding point. The U rib plate welding device for the bridge reduces the procedures of tack welding, performs welding while clamping, reduces material deformation and stress concentration caused by the tack welding, and can omit a separate procedure of tack welding by performing welding while clamping, reduces production steps and accelerates production progress.

Description

U rib plate welding device for bridge

Technical Field

The invention relates to the technical field of steel structure welding, in particular to a U rib plate welding device for a bridge.

Background

The welding device for the U rib plates for the bridge is special equipment for welding the U rib plates onto bridge decks (or bottom plates), aims to improve welding efficiency, accuracy and welding quality, and has the characteristic of automation and accurate control to ensure stability and consistency in the welding process due to the importance of welding the U rib plates in a bridge structure.

A bridge welding device and a bridge welding method are disclosed in the patent publication CN107775207 a. The bridge welding device comprises a welding device and a fixing tool used for fixing the U rib plates, wherein the welding device is used for welding the U rib plates, the fixing tool comprises a tool body, a rotating shaft and a first driving device, one end of the rotating shaft penetrates through the tool body and is rotationally connected with the tool body, the first driving device is connected with one end of the tool body, and the first driving device can drive the tool body to rotate around the rotating shaft. The fixed frock is used for fixed U floor, makes fixed frock rotatory through a drive arrangement, has certain angle between frock body and the ground, consequently, U floor also has certain contained angle with ground, and the U floor of being convenient for welds, then welding set welds U floor.

The prior art has the following defects:

The existing U rib plate welding process generally comprises the steps of clamping and positioning, positioning welding and full welding. Although this approach is widely adopted in practice, there are some drawbacks and challenges. The following are major drawbacks that may exist with this process flow:

And during the positioning welding, local high temperature can lead to expansion and contraction of materials, so that the welding deformation is generated, the problems of U rib warpage, uneven plate surface and the like can occur after the positioning welding due to the structural characteristics of the U rib and the bridge deck, the quality of the subsequent full welding is affected, and if the positioning welding is carried out at a plurality of positions, the cumulative effect of the deformation can lead to the deviation of the size and the shape of the whole structure from the design requirement, and the difficulty of the subsequent correction is increased.

The tack welding strength is insufficient, the tack welding is usually only temporary fixation, the welding spot is small and the strength is limited. If the weld spot breaks during the full weld process due to heat input and operational effects, the relative positions of the U-ribs and bridge deck may change, affecting weld quality.

Stress concentration the spot welds may become stress concentration points, particularly during subsequent full welds, and may be susceptible to cracking or fatigue failure in the vicinity of the spot welds due to the presence of the heat affected zone.

The production efficiency is low, the multiple clamping and adjustment are carried out, namely the clamping and positioning are needed, the positioning welding is carried out, the full welding is carried out, the multiple clamping, positioning welding and full welding are needed, the equipment and labor cost is high, the production efficiency is low, the subsequent full welding can be carried out after the positioning welding is finished, and the production period is increased.

Disclosure of Invention

In view of the above problems in the prior art, a welding device and a welding method for a U rib plate for a bridge are provided.

The application provides a welding device for a U rib plate for a bridge, which aims to integrate positioning welding and full welding together, and weld the U rib plate while positioning and clamping, so that the welding procedure is reduced, the welding quality is ensured, and the cost is saved.

The technical proposal of the invention is that the welding device of the U rib plate for the bridge comprises a portal frame, a bearing plate arranged below the portal frame, a driving component arranged at the bottom of the bearing plate and used for moving the bearing plate, and also comprises,

The welding assembly is arranged on the portal frame and is used for welding the U rib plates;

The bearing assembly is arranged on the bearing plate and used for fixing the bottom plate;

the clamping assemblies are arranged at two ends of the U rib plate and are used for positioning the U rib plate;

the pressure assemblies are arranged in parallel, are closely arranged above the U rib plates and are used for pressing the U rib plates and the bottom plate;

the blocking assembly is arranged on the portal frame and used for blocking the pressure assembly;

when the bearing plate passes through the portal frame along the direction perpendicular to the portal frame, the welding assembly welds the U rib plates on the bottom plate, and the blocking assembly sequentially blocks the plurality of groups of pressure assemblies in front of the welding points.

By adopting the technical scheme, the device reduces the working procedure of tack welding, performs welding while clamping, reduces material deformation and stress concentration caused by tack welding, omits a separate tack welding working procedure by performing welding while clamping, reduces production steps, accelerates production progress, reduces manual operation by automatic equipment, transfers errors caused by plates, and improves welding consistency and accuracy.

Further, the welding assembly comprises a horizontal moving assembly arranged on the portal frame, a vertical moving assembly arranged on the horizontal moving assembly and a welding machine arranged on the vertical moving assembly.

By adopting the scheme, the welding machine can horizontally and vertically move through the welding assembly, and the U rib plates are welded after the welding machine moves to a proper position.

Further, the bearing assembly comprises a plurality of groups of lower supporting frames arranged on the bearing plate, a plurality of groups of upper supporting frames are hinged to the lower supporting frames respectively, a jig frame is connected to the plurality of groups of upper supporting frames, a plurality of groups of buckling ribs are arranged on the upper surface of the jig frame, the bottom plate is tightly attached to the buckling ribs, and a plurality of groups of hydraulic pressing claws are arranged on the left side and the right side of the jig frame.

By adopting the scheme, the bottom plate is fixed through the bearing assembly, a certain angle is formed between the bottom plate and the ground, the position of a welding seam can be adjusted, and the welding gun can weld at a more proper angle, so that the quality of the welding seam is ensured, the welding path can be smoother by tilting the bottom plate, the adjustment and the pause time of equipment are reduced, the welding speed and the production efficiency are improved, the welding heat input can be more uniform by tilting the bottom plate, and the local overheating and the stress concentration are reduced, so that the risk of welding deformation is reduced.

Further, the clamping assembly comprises clamping blocks arranged on the front side and the rear side of the jig frame, wherein the clamping blocks located on the front side are connected with the jig frame through hydraulic pushing rods, each clamping block comprises a bottom block, an inner clamping block arranged at the end part of the bottom block, and an outer clamping block arranged at the end part of the bottom block, the shape of each inner clamping block is attached to the inner outline of a U rib plate, the symmetry of each outer clamping block is arranged at the bending part of the U rib plate and attached to the outer outline of the U rib plate, the end part of each U rib plate is clamped between the inner clamping block and the outer clamping block, and the number of the clamping blocks is matched with that of the U rib plates.

By adopting the scheme, through setting up clamping assembly, carry out the centre gripping from U floor both ends, fix a position many U floor on the bottom plate.

Further, the pressure component comprises sliding rods symmetrically arranged on the left side and the right side of the jig frame, a plurality of groups of pressure frames arranged on the pair of sliding rods in a sliding mode, and a plurality of groups of pressure claws arranged on the pressure frames, wherein the pressure claws are attached to the outer outline of the U rib plate, a pair of side rollers and a top roller are arranged on the pressure claws, the side rollers are in extrusion contact with the side faces of the U rib plate, the top rollers are in extrusion contact with the top faces of the U rib plate, and the number of the pressure claws on each group of pressure frames is matched with the number of the U rib plate.

By adopting the scheme, pressure is applied to the plurality of U rib plates at equal intervals by arranging the pressure components, so that the edges of the U rib plates are in close contact with the bottom plate, and the consistency of welding seams is ensured.

Further, the top fixedly connected with sliding block of pressure claw, be provided with the sliding chamber that supplies the sliding block to slide perpendicularly on the pressure frame, be provided with the spring in the sliding chamber, the spring offsets with the sliding block, be provided with the chute on the sliding block, be provided with the extrusion hole with the chute department of corresponding on the pressure frame, extrusion hole intercommunication sliding chamber, be provided with the extrusion pole on the opposite face that corresponds with the extrusion hole on the pressure frame, extrusion pole and extrusion hole assorted.

By adopting the scheme, when a plurality of pressure frames are blocked by the device, the blocked pressure claw is lifted, so that the deformation caused by the stress concentration of the U rib plate due to the fact that the blocked pressure claw applies pressure to the U rib plate in a concentrated manner is avoided.

Further, the arresting assembly comprises an arresting rod arranged on the portal frame and an arresting plate arranged on the arresting rod, the arresting plate is arc-shaped, the circle center of the arresting plate coincides with the rotation center of the bearing assembly, the arresting assembly further comprises an arresting arm arranged on the last lateral pressure frame and a supporting rod arranged on the arresting arm, the supporting rod corresponds to the arresting plate in position, the end part of the supporting rod is provided with a clamping head, an arc-shaped groove is formed in the arresting plate, and the arc-shaped groove is matched with the clamping head.

By adopting the scheme, the blocking assembly is arranged, so that the plurality of pressure frames are blocked when moving to the front of the welding machine, and the welding of the U rib plates is not influenced when the U rib plates are positioned by applying pressure.

Further, steel ropes are connected among the plurality of groups of pressure frames.

By adopting the scheme, through setting up the cable wire, when the loading board resets, the arresting subassembly pulls a plurality of pressure frames, makes a plurality of pressure frames equidistance distribute again on the U floor.

The invention has the beneficial effects that:

The device reduces the working procedure of positioning welding, welding is carried out while clamping, material deformation and stress concentration caused by positioning welding are reduced, the welding is carried out while clamping, the independent positioning welding working procedure can be omitted, the production steps are reduced, the production progress is accelerated, the manual operation can be reduced by automatic equipment, errors caused by transferring plates are reduced, and the consistency and the accuracy of welding are improved.

Drawings

FIG. 1 is a perspective view of a U-shaped rib plate welding device for a bridge of the invention;

FIG. 2 is a front view of the U-ribbed plate welding device for bridges of the present invention;

FIG. 3 is a perspective view of a bearing assembly in the U-ribbed plate welding device for the bridge;

FIG. 4 is a rear view of the load bearing assembly of the U-ribbed plate welding device for bridges of the present invention;

FIG. 5 is a perspective view of the hidden bottom plate and U rib of FIG. 3 of the present invention;

FIG. 6 is a diagram showing the connection between the bottom plate and the U rib plate in the U rib plate welding device for the bridge;

FIG. 7 is a perspective view of the pressure claw in the U-ribbed plate welding device for the bridge;

FIG. 8 is a left-right cross-sectional view of the pressure claw in the U-ribbed plate welding device for bridges of the present invention;

FIG. 9 is a front-rear sectional view of the pressure claw in the U-ribbed plate welding device for bridges of the present invention;

FIG. 10 is a perspective view of a clamping block in the U-ribbed plate welding device for the bridge of the invention;

FIG. 11 is an exploded view of a dam assembly in the U-ribbed plate welding apparatus for bridges of the present invention.

In the figure:

1. Portal frame, 2, bearing plate, 3, welding component, 4, U rib plate, 5, bearing component, 6, bottom plate, 7, clamping component, 8, pressure component, 9, blocking component, 10, horizontal moving component, 11, vertical moving component, 12, welding machine, 13, lower support frame, 14, upper support frame, 15, tire frame, 16, buckling rib, 17, hydraulic pressure claw, 18, clamping block, 19, hydraulic push rod, 20, bottom block, 21, inner clamping block, 22, outer clamping block, 23, slide bar, 24, pressure frame, 25, pressure claw, 26, side roller, 27, top roller, 28, slide block, 29, sliding cavity, 30, spring, 31, chute, 32, extrusion hole, 33, extrusion rod, 34, blocking rod, 35, blocking plate, 36, blocking arm, 37, butt rod, 38, clip head, 39, arc groove, 40, steel cable.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

Referring to fig. 1-11, a welding device for a bridge U rib plate is provided, and the welding device for a bridge U rib plate comprises a portal frame 1, a bearing plate 2 arranged below the portal frame 1, a driving component arranged at the bottom of the bearing plate 2 and used for moving the bearing plate 2, a welding component 3 arranged on the portal frame 1 and used for welding the U rib plate 4, a bearing component 5 arranged on the bearing plate 2 and used for fixing a bottom plate 6, a clamping component 7 arranged at two ends of the U rib plate 4 and used for positioning the U rib plate 4, a plurality of groups of pressure components 8 arranged in parallel and closely above the U rib plate 4 and used for pressing the U rib plate 4 with the bottom plate 6, and a blocking component 9 arranged on the portal frame 1 and used for blocking the pressure components 8, wherein when the bearing plate 2 passes through the portal frame 1 along the direction perpendicular to the portal frame 1, the welding component 3 welds the U rib plate 4 on the bottom plate 6, and the blocking component 9 sequentially blocks the plurality of groups of pressure components 8 in front of welding points.

Specifically, during welding, the bearing plate 2 performs feeding motion to the direction of the portal frame 1 through the driving component, so that the bottom plate 6 and the U rib plates 4 which finish positioning assembly pass through the welding component 3 to finish welding, or the bearing plate 2 can be fixed on the ground, the driving component is arranged on the portal frame 1, so that the portal frame 1 carries the welding component 3 to feed to the bottom plate 6 to finish welding, when the welding bottom plate 6 is smaller, the bottom plate 6 can be selected to feed to the welding component 3, and when the welding bottom plate 6 is larger, the welding component 3 can be selected to feed to the bottom plate 6.

The device improves production efficiency, can omit a single positioning welding procedure by welding while clamping, reduces production steps, quickens production progress, can directly carry out full welding after clamping without waiting for finishing and cooling of positioning welding, shortens the whole production period, can realize continuous operation by clamping and welding, reduces the carrying and turnover time of workpieces, improves the fluency of a production line, can reduce manual operation by automatic clamping and welding equipment, reduces dependence on welding skills, lowers labor cost, can manage a plurality of equipment by one operator because clamping and welding can be synchronously carried out, further reduces labor cost, and reduces deformation caused by positioning welding, wherein the positioning welding is usually only temporarily fixed, has smaller welding spots and limited strength and is easy to cause local deformation. The welding quality can be ensured by carrying out full welding while clamping, and the stress concentration is reduced, namely, the positioning welding spots can become stress concentration points, especially in the subsequent full welding process. The welding line can avoid the problem of stress concentration caused by positioning welding points, improve the integral strength and the reliability of the structure, and is more uniform because of no need of clamping and adjusting for multiple times, and the welding line can be more uniform and consistent, thereby reducing welding defects.

Referring to fig. 1 and 2, the welding assembly 3 includes a horizontal moving assembly 10 provided on the gantry 1, a vertical moving assembly 11 provided on the horizontal moving assembly 10, and a welder 12 provided on the vertical moving assembly 11.

Specifically, the welding assembly 3 is provided with 4 groups, the horizontal moving assembly 10 is used for adjusting the horizontal positions of the welding machines 12, the vertical moving assembly 11 is used for adjusting the vertical positions of the welding machines 12, the welding machines 12 are selected to be laser welding machines 12, the laser welding has extremely high energy density, high-precision and high-quality welding can be realized, and the welding machine is suitable for U-rib welding with thin wall and high strength requirements.

It is to be understood that the number of the welding assemblies 3 is not limited to the number in the present embodiment, and the number of the corresponding welding assemblies 3 may be selected according to the number of the U-ribs 4 to be welded to the bottom plate 6.

The welding head of the welding machine 12 can move horizontally and vertically through the welding assembly 3, and after the welding head is moved to a proper position, the U rib plate 4 is welded through the feeding motion of the bearing plate 2.

Referring to fig. 1, 4 and 5, the bearing assembly 5 comprises a plurality of groups of lower supporting frames 13 arranged on the bearing plate 2, a plurality of groups of upper supporting frames 14 are respectively hinged on the plurality of groups of lower supporting frames 13, a jig frame 15 is connected to the plurality of groups of upper supporting frames 14, a plurality of groups of back bending ribs 16 are arranged on the upper surface of the jig frame 15, the bottom plate 6 is tightly attached to the back bending ribs 16, and a plurality of groups of hydraulic pressing claws 17 are respectively arranged on the left side and the right side of the jig frame 15.

Specifically, the upper supporting frames 14 are fixed on the lower surface of the jig frame 15, a plurality of groups of hydraulic ejector rods are symmetrically arranged between the jig frame 15 and the bearing plate 2, each group of hydraulic ejector rods can enable the jig frame 15 to rotate + -15 degrees relative to the bearing plate 2, during welding, the jig frame 15 is enabled to rotate +15 degrees relative to the bearing plate 2, after welding of one side of the U-shaped rib plate 4 is completed, the bearing plate 2 is reset, then the jig frame 15 is enabled to rotate-15 degrees relative to the bearing plate 2, and welding of the other side of the U-shaped rib plate 4 is completed.

The bottom plate 6 is fixed through the bearing assembly 5, a certain angle is formed between the bottom plate 6 and the ground, the position of a welding seam can be adjusted, a welding gun can weld at a more proper angle, and therefore welding seam quality is guaranteed, the welding path can be smoother through the inclined bottom plate 6, equipment adjustment and pause time are reduced, welding speed and production efficiency are improved, welding heat input can be more uniform through the inclined bottom plate 6, local overheating and stress concentration are reduced, and therefore risks of welding deformation are reduced.

Referring to fig. 1, 3 and 10, the clamping assembly 7 comprises clamping blocks 18 arranged on the front side and the rear side of the tire frame 15, wherein the clamping blocks 18 on the front side are connected with the tire frame 15 through hydraulic push rods 19, the clamping blocks 18 comprise bottom blocks 20, inner clamping blocks 21 arranged at the end parts of the bottom blocks 20 and outer clamping blocks 22 arranged at the end parts of the bottom blocks 20, the inner clamping blocks 21 are in shape and are attached to the inner outline of the U rib plate 4, the outer clamping blocks 22 are symmetrically arranged at the bending parts of the U rib plate 4 and are attached to the outer outline of the U rib plate 4, the end parts of the U rib plate 4 are clamped between the inner clamping blocks 21 and the outer clamping blocks 22, and the number of the clamping blocks 18 is matched with that of the U rib plate 4.

Specifically, the bottom block 20 of the front clamping block 18 is longer, the front clamping block 18 clamps and positions two ends of the U rib rod through the hydraulic push rod 19, besides fixing the U rib plate 4, the front clamping block 18 is also used for receiving the blocked pressure frames 24, and when being welded to the tail end of the U rib plate 4, multiple groups of pressure frames 24 are pushed onto the front clamping block 18.

Through setting up clamping assembly 7, carry out the centre gripping from U floor 4 both ends, fix a plurality of U floor 4 on bottom plate 6.

Referring to fig. 1,3 and 8, the pressure assembly 8 comprises slide bars 23 symmetrically arranged on the left and right sides of the jig frame 15, a plurality of groups of pressure frames 24 slidably arranged on the pair of slide bars 23, and a plurality of groups of pressure claws 25 arranged on the pressure frames 24, wherein the pressure claws 25 are attached to the outer contour of the U rib plate 4, a pair of side rollers 26 and a top roller 27 are arranged on the pressure claws 25, the side rollers 26 are in pressing contact with the side surfaces of the U rib plate 4, the top roller 27 is in pressing contact with the top surface of the U rib plate 4, and the number of the pressure claws 25 on each group of pressure frames 24 is matched with the number of the U rib plate 4.

Specifically, two sets of slide bars 23 pass through support frame and bed-jig 15 fixed connection, there is the slide opening at the both ends of pressure frame 24, slide on slide bar 23 through slide opening pressure frame 24, multiunit pressure frame 24 parallel arrangement, top gyro wheel 27 extrudees U floor 4 with a pair of side gyro wheel 26 from three direction, make U floor 4 hug closely bottom plate 6, top gyro wheel 27 and side gyro wheel 26 are the rubber material, with U floor 4 extrusion contact, after pressure frame 24 is blocked, top gyro wheel 27 and side gyro wheel 26 and U floor 4 rolling contact can not cause the mar to U floor 4 surface.

Through setting up pressure subassembly 8, equidistance applied pressure makes the edge and the bottom plate 6 in close contact of U floor 4 on many U floor 4, guarantees the uniformity of welding seam.

Referring to fig. 3,5 and 7-9, a sliding block 28 is fixedly connected to the top of the pressure claw 25, a sliding cavity 29 for the sliding block 28 to slide vertically is arranged on the pressure frame 24, a spring 30 is arranged in the sliding cavity 29, the spring 30 abuts against the sliding block 28, a chute 31 is arranged on the sliding block 28, a pressing hole 32 is arranged on the pressure frame 24 corresponding to the chute 31, the pressing hole 32 is communicated with the sliding cavity 29, a pressing rod 33 is arranged on the opposite surface of the pressure frame 24 corresponding to the pressing hole 32, and the pressing rod 33 is matched with the pressing hole 32.

Specifically, the sliding block 28 is 冂 -shaped, the sliding block 28 slides in the sliding cavity 29, the spring 30 extrudes the sliding block 28, so that the top roller 27 and the side roller 26 extrude the U rib plates 4, the compression force on the U rib plates 4 is increased, after more than two pressure brackets 24 are blocked, the adjacent extrusion rods 33 penetrate into the extrusion holes 32, the extrusion rods 33 act on the chute 31, the sliding block 28 is lifted, and the top roller 27 and the side roller 26 are lifted up, so that the extrusion on the U rib plates 4 is released.

By the device, when the plurality of pressure frames 24 are blocked, the blocked pressure claws 25 are lifted, so that the deformation of the U rib plates 4 caused by the stress concentration of the U rib plates 4 due to the fact that the blocked pressure claws 25 apply pressure to the U rib plates 4 in a concentrated mode is avoided.

Referring to fig. 1 and 11, the arresting assembly 9 includes an arresting bar 34 disposed on the gantry 1, an arresting plate 35 disposed on the arresting bar 34, the arresting plate 35 is arc-shaped, the center of circle of the arresting plate coincides with the rotation center of the bearing assembly 5, and further includes an arresting arm 36 disposed on the last lateral pressure frame 24, and a supporting rod 37 disposed on the arresting arm 36, the supporting rod 37 corresponds to the arresting plate 35 in position, a clamping head 38 is disposed at an end of the supporting rod 37, an arc-shaped groove 39 is disposed on the arresting plate 35, and the arc-shaped groove 39 is matched with the clamping head 38.

Specifically, when the clamping head 38 is clamped in the arc-shaped groove 39, a certain tensile force can be borne, the clamping head 38 is clamped in the arc-shaped groove 39, and after the single-side welding is completed, the receiving plate is reset, and the clamping head 38 drives the pressure frames 24 to reset together.

By providing the arresting assembly 9, the plurality of pressure brackets 24 are arrested when moving to the front of the welder 12, and the welding of the U rib plates 4 is not affected while the pressure is applied to the U rib plates 4 for positioning.

Referring to fig. 3, a cable 40 is connected between the plurality of sets of pressure frames 24.

By providing the steel cables 40, the arresting assembly 9 pulls the plurality of pressure frames 24 when the loading plate 2 is reset, so that the plurality of pressure frames 24 are distributed on the U rib plate 4 at equal intervals again.

It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.

Claims

1. The U rib plate welding device for the bridge comprises a portal frame (1) and a bearing plate (2) arranged below the portal frame (1), wherein a driving assembly is arranged at the bottom of the bearing plate (2) and used for moving the bearing plate (2), and is characterized by further comprising,

The welding assembly (3) is arranged on the portal frame (1) and is used for welding the U rib plates (4);

The bearing assembly (5) is arranged on the bearing plate (2) and used for fixing the bottom plate (6);

the clamping assemblies (7) are arranged at two ends of the U rib plate (4) and are used for positioning the U rib plate (4);

The pressure assemblies (8) are arranged in parallel, are tightly arranged above the U-shaped rib plates (4) and are used for tightly pressing the U-shaped rib plates (4) with the bottom plate (6);

the blocking assembly (9) is arranged on the portal frame (1) and used for blocking the pressure assembly (8);

when the bearing plate (2) passes through the portal frame (1) along the direction perpendicular to the portal frame (1), the welding component (3) welds the U rib plate (4) on the bottom plate (6), and the blocking component (9) sequentially blocks the plurality of groups of pressure components (8) in front of the welding point.

2. The welding device for U rib plates for bridges according to claim 1, wherein the welding assembly (3) comprises a horizontal moving assembly (10) arranged on a portal frame (1), a vertical moving assembly (11) arranged on the horizontal moving assembly (10), and a welding machine (12) arranged on the vertical moving assembly (11).

3. The welding device for U rib plates for bridges according to claim 1, wherein the bearing assembly (5) comprises a plurality of groups of lower supporting frames (13) arranged on the bearing plate (2), a plurality of groups of upper supporting frames (14) are hinged to the lower supporting frames (13) respectively, a jig frame (15) is connected to the upper supporting frames (14), a plurality of groups of buckling ribs (16) are arranged on the upper surface of the jig frame (15), the bottom plate (6) is tightly attached to the buckling ribs (16), and a plurality of groups of hydraulic pressing claws (17) are arranged on the left side and the right side of the jig frame (15).

4. The welding device for the U rib plates for the bridge, as set forth in claim 1, wherein the clamping assembly (7) comprises clamping blocks (18) arranged on the front side and the rear side of the jig frame (15), the clamping blocks (18) arranged on the front side are connected with the jig frame (15) through hydraulic pushing rods (19), the clamping blocks (18) comprise bottom blocks (20), inner clamping blocks (21) arranged at the ends of the bottom blocks (20) and outer clamping blocks (22) arranged at the ends of the bottom blocks (20), the inner clamping blocks (21) are in shapes which are attached to the inner contour of the U rib plates (4), the outer clamping blocks (22) are symmetrically arranged at bending positions of the U rib plates (4) and are attached to the outer contour of the U rib plates (4), the ends of the U rib plates (4) are clamped between the inner clamping blocks (21) and the outer clamping blocks (22), and the number of the clamping blocks (18) is matched with that of the U rib plates (4).

5. The welding device for the U rib plates for the bridge, as set forth in claim 1, wherein the pressure assembly (8) comprises sliding rods (23) symmetrically arranged on the left side and the right side of the jig frame (15), a plurality of groups of pressure frames (24) arranged on the pair of sliding rods (23) in a sliding manner, and a plurality of groups of pressure claws (25) arranged on the pressure frames (24), the pressure claws (25) are attached to the outer contour of the U rib plates (4), a pair of side rollers (26) and a top roller (27) are arranged on the pressure claws (25), the side rollers (26) are in pressing contact with the side surfaces of the U rib plates (4), and the top rollers (27) are in pressing contact with the top surfaces of the U rib plates (4), and the number of the pressure claws (25) on each group of the pressure frames (24) is matched with the number of the U rib plates (4).

6. The welding device for U rib plates for bridges according to claim 5, wherein the top of the pressure claw (25) is fixedly connected with a sliding block (28), a sliding cavity (29) for the sliding block (28) to vertically slide is arranged on the pressure frame (24), a spring (30) is arranged in the sliding cavity (29), the spring (30) abuts against the sliding block (28), a chute (31) is arranged on the sliding block (28), an extrusion hole (32) is arranged on the pressure frame (24) corresponding to the chute (31), the extrusion hole (32) is communicated with the sliding cavity (29), an extrusion rod (33) is arranged on the opposite surface of the pressure frame (24) corresponding to the extrusion hole (32), and the extrusion rod (33) is matched with the extrusion hole (32).

7. The welding device for U rib plates for bridges according to claim 6, wherein the blocking component (9) comprises a blocking rod (34) arranged on a portal frame (1) and a blocking plate (35) arranged on the blocking rod (34), the blocking plate (35) is arc-shaped, the circle center of the blocking plate is coincident with the rotation center of the bearing component (5), the welding device further comprises a blocking arm (36) arranged on a final lateral pressure frame (24) and a supporting rod (37) arranged on the blocking arm (36), the supporting rod (37) corresponds to the blocking plate (35) in position, the end part of the supporting rod (37) is provided with a clamping head (38), the blocking plate (35) is provided with an arc-shaped groove (39), and the arc-shaped groove (39) is matched with the clamping head (38).

8. The welding set of U-shaped rib plates for bridges according to claim 7, wherein steel cables (40) are connected between the plurality of groups of pressure frames (24).