Steel structure welding equipment and method for bridge construction

Abstract

The present invention relates to the technical field of bridge welding construction, and specifically to a steel structure welding device and method for bridge construction, comprising a welding table, a bridge frame clamping mechanism, a lining rod clamping mechanism and a linkage adjustment structure; the bridge frame clamping mechanism is used to fix the upper and lower main beams of the bridge frame; the lining rod clamping mechanism is arranged at the upper end of the bridge frame clamping mechanism, the lining rod clamping mechanism comprises a second clamping assembly, the second clamping assembly comprises two clamping plates and a third driving structure, the third driving structure drives the two clamping plates to approach or move away from each other; there are two linkage adjustment structures, the two linkage adjustment structures are respectively arranged at the two ends of the lining rod clamping mechanism, and the linkage adjustment structure enables the position of the lining rod clamping mechanism to change with the operation of the bridge frame clamping mechanism; the present invention arranges the bridge frame clamping mechanism, the lining rod clamping mechanism and the linkage adjustment structure, so as to avoid manual adjustment of the position of the lining rod on the bridge frame.

Description

Technical Field

[0001] The invention relates to the technical field of bridge welding construction, and in particular to a steel structure welding device and method for bridge construction. Background Art

[0002] During the construction of steel structure bridges, some basic components such as piers, bottom plates, steel trusses, etc. are manufactured in prefabrication workshops through processes such as cutting, welding, heat treatment, and anti-corrosion spraying, and are then transported to the construction site by mechanical equipment for assembly.

[0003] A welding method for the construction of a prefabricated steel structure bridge applied for by Chinese patent application CN202311564233.X adopts a main beam fixing mechanism, which can be adjusted according to the spacing and length of the main beams, and can be adjusted to adaptively clamp various types of main beams. At the same time, the clamping is stable, and the use is quick and convenient. In addition, a lining rod positioning mechanism is adopted, which can replace manual clamping of the lining rods for stable clamping, and can automatically adjust the position and angle according to the placement of the lining rods accurately. It has strong applicability and saves time and effort to use.

[0004] However, in the above patent application, the lining rod positioning mechanism is fixedly installed on the base, so that the lining rod positioning mechanism can only move within the plane where the middle surface of the base is located. Due to the matching accuracy and other reasons of the main beam fixing structure, after the main beam is fixed, the middle surface of the main beam is not coplanar with the middle surface of the base. When the lining rod positioning mechanism places the lining rod on the main beam, the two ends of the lining rod may not be aligned with the upper and lower ends of the main beam, and the staff still needs to adjust the position of the lining rod. Summary of the invention

[0005] In view of the above problems, a steel structure welding device for bridge construction is provided. The present invention provides a bridge frame clamping mechanism, a liner rod clamping mechanism and a linkage adjustment structure, thereby avoiding manual adjustment of the position of the liner rod on the bridge frame.

[0006] In order to solve the problems of the prior art, the present invention provides a steel structure welding equipment for bridge construction, including a welding table, a bridge frame clamping mechanism, a lining rod clamping mechanism and a linkage adjustment structure; a welding table; the bridge frame clamping mechanism is used to fix the upper and lower main beams of the bridge frame so that the middle surfaces of the upper and lower main beams are parallel to the middle surface of the welding table; the lining rod clamping mechanism is arranged at the upper end of the bridge frame clamping mechanism, the lining rod clamping mechanism includes a second clamping assembly, a rotating structure and a double-degree-of-freedom control structure, the second clamping assembly includes two clamping plates and a third driving structure, the third driving structure drives the two clamping plates to move closer to or away from each other, the rotating structure is used to rotate the lining rod clamped by the second clamping assembly, and the double-degree-of-freedom control structure is used to drive the lining rod clamped by the second clamping assembly to adjust in the horizontal and vertical directions; there are two linkage adjustment structures, the two linkage adjustment structures are respectively arranged at both ends of the lining rod clamping mechanism, and the linkage adjustment structure enables the position of the lining rod clamping mechanism to change with the operation of the bridge frame clamping mechanism.

[0007] Preferably, the liner rod clamping mechanism also includes a liner rod centering adjustment structure, and the liner rod centering adjustment structure includes an adjustment component; there are two adjustment components, and the two adjustment components are respectively arranged on both sides of the third driving structure, and the two adjustment components are perpendicular to the third driving structure, and the two adjustment components are used to adjust the distance between the two ends of the liner rod and the middle surface of the clamping plate.

[0008] Preferably, the liner rod clamping mechanism also includes an opening and closing structure, and the opening and closing structure is used to adjust the angle between the two adjustment components.

[0009] Preferably, the second clamping assembly further comprises a rolling structure, wherein the rolling structures are provided with two rolling structures, and the two rolling structures are respectively arranged on the two clamping plates, and the two rolling structures are used to clamp the lining rod.

[0010] Preferably, the bridge frame clamping mechanism includes a first clamping component and a first driving structure; the first clamping component has two, the two first clamping components are symmetrically arranged about the middle surface of the welding table, the first clamping component includes a clamping rod, two first movable blocks, two L-shaped clamps and two elastic connecting structures, the two first movable blocks are respectively arranged at both ends of the clamping rod, the two L-shaped clamps are respectively arranged on one side of the two first movable blocks, the two elastic connecting structures are respectively arranged on the two first movable blocks, and the elastic connecting structures are used to connect the L-shaped clamps and the first movable blocks; the first driving structure has two, the two first driving structures are respectively arranged at both ends of the welding table, and the two first driving structures are used to drive the two first clamping components to move closer to or away from each other.

[0011] Preferably, the clamping rod is a double-headed screw, and the bridge frame clamping mechanism also includes a second drive structure, which is used to drive two L-shaped clamps located on the same clamping rod to approach each other, and the second drive structure includes a synchronous transmission structure, which is used to transmit the rotation of one clamping rod to another clamping rod.

[0012] Preferably, the second driving structure further comprises a transmission adjustment structure, and the transmission adjustment structure is used to keep the transmission effect of the synchronous transmission structure unchanged when the positions of the two clamping rods change.

[0013] Preferably, the first clamping structure further includes a clamping structure, and there are two clamping structures, which are arranged between the first moving block and the L-shaped clamping plate, and are used to connect the first moving block and the L-shaped clamping plate.

[0014] Preferably, the bridge frame clamping mechanism also includes a synchronous driving structure, which is used to drive the first driving structure and the second driving structure to move simultaneously.

[0015] A method for welding steel structure equipment for bridge construction, comprising the following steps:

[0016] S1, placing the bridge frame on the welding table, the two first driving structures drive the two first clamping assemblies to clamp the bridge frame from one direction of the bridge frame, and the second driving structure drives the two first clamping assemblies to clamp the bridge frame from another direction of the bridge frame, so that two degrees of freedom of the bridge frame are restricted;

[0017] S2, in the process of the two first driving structures and driving the two first clamping assemblies to clamp the bridge frame, the two linkage adjustment structures adjust the position of the lining rod clamping mechanism so that the second clamping assembly is located directly above the middle surface of the bridge frame;

[0018] S3, the second clamping assembly clamps the lining rod, and the two adjustment assemblies adjust the position of the lining rod;

[0019] S4, the opening and closing structure drives the two adjustment components away from the lining rod;

[0020] S5, after the rotating structure adjusts the angle between the lining rod and the bridge frame bracket, the dual-degree-of-freedom control structure places the lining rod on the bridge frame, and the external welding robot welds the connection between the lining rod and the bridge frame.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention is provided with a bridge frame clamping mechanism, a lining rod clamping mechanism and a linkage adjustment structure. The linkage adjustment structure drives the lining rod clamping mechanism to follow the movement of the bridge frame clamping mechanism, so that the lining rod clamping mechanism is directly above the middle surface of the bridge frame. When the lining rod is clamped by the second clamping assembly, the middle surface of the lining rod is coplanar with the middle surface of the bridge frame. After the lining rod is rotated, the two ends of the lining rod are flush with the surfaces opposite to the upper and lower main beams of the bridge frame, so that the lining rod can be directly placed between the upper and lower main beams of the bridge frame, thereby avoiding manual adjustment of the position of the lining rod on the bridge frame.

[0023] 2. The present invention provides a centering adjustment structure for the lining rod. After the two clamping plates clamp the lining rod first, the two third screws rotate simultaneously, the third screw drives the fourth movable block to move, and the fourth movable block drives the push plate to move. After the push plate abuts against one end of the lining rod, the push plate pushes the lining rod to move. When the other end of the lining rod abuts against another push plate, the two third screws stop rotating. At this time, the clamping position of the two clamping plates is the middle part of the lining rod, so that the middle surface of the lining rod is coplanar with the middle surface of the bridge frame.

[0024] 3. The present invention is provided with an opening and closing structure, and a linear drive drives the first connecting plate to rise upward, and the first connecting plate drives the two second fixed shafts to rise simultaneously, and the second fixed shafts slide in the strip groove, and the two second fixed shafts drive the two second connecting plates to move, and the two second connecting plates drive the two fourth rectangular frames to rotate, so that the angle between the two fourth rectangular frames is reduced, and both push plates rise upward, thereby avoiding the adjustment component interfering with the placement of the lining rod into the bridge frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a stereogram of steel structure welding equipment used in bridge building construction.

[0026] Figure 2 The present invention is a stereoscopic diagram of a welding table, a lining rod clamping mechanism and a linkage adjustment structure in a steel structure welding device used in bridge construction.

[0027] Figure 3 It is a stereoscopic diagram of a liner rod clamping mechanism in a steel structure welding device used in bridge building construction.

[0028] Figure 4 The present invention is a stereoscopic diagram of a third driving structure and a liner rod centering adjustment structure in a steel structure welding device used in bridge construction.

[0029] Figure 5 The present invention is a stereoscopic diagram of a third driving structure, a fourth rectangular frame and an opening and closing structure in a steel structure welding device for bridge construction.

[0030] Figure 6 It is a stereoscopic view of a second clamping assembly in a steel structure welding device used in bridge building construction.

[0031] Figure 7 The present invention is a stereoscopic diagram of a welding table, a bridge frame clamping mechanism and a linkage adjustment structure in a steel structure welding device used in bridge construction.

[0032] Figure 8 The present invention is a stereoscopic diagram of a first clamping assembly and a first driving structure in a steel structure welding device for bridge construction.

[0033] Fig. 9 The present invention is a stereoscopic diagram of a clamping rod, a first driving structure and a synchronous transmission structure in a steel structure welding device for bridge construction.

[0034] Fig.10 The present invention is a stereoscopic diagram of a clamping rod, a first drive structure and a second drive structure in a steel structure welding device for bridge construction.

[0035] Fig.11 The present invention is a three-dimensional diagram of a first moving block, an L-shaped clamping plate, an elastic connection structure and a clamping structure in a steel structure welding device for bridge construction.

[0036] Fig.12 The invention discloses a stereoscopic diagram of a first rectangular frame, a first screw rod, a second moving block, a second rectangular frame, a second screw rod, a third moving block and a synchronous driving structure in a steel structure welding device for bridge construction.

[0037] The numbers in the figure are: 1, welding table; 2, bridge frame clamping mechanism; 21, first clamping assembly; 211, clamping rod; 212, first moving block; 213, L-shaped clamping plate; 214, elastic connection structure; 215, clamping structure; 2151, convex block; 2152, concave block; 22, first driving structure; 221, first rectangular frame; 222, first screw rod; 223, second moving block; 224, first connecting block; 23, second driving structure; 231, synchronous transmission structure; 2311, first transmission wheel; 2312, transmission belt; 232, transmission adjustment structure; 2321, second rectangular frame; 2322, second screw rod; 2323, third moving block; 2324, first fixed shaft; 2325, second transmission wheel; 24, synchronous driving structure; 241, third rectangular frame; 242, rotary driver; 243. First bevel gear; 244. Second bevel gear; 245. Third bevel gear; 3. Liner rod clamping mechanism; 31. Second clamping assembly; 311. Clamping plate; 312. Third driving structure; 313. Rolling structure; 3131. Rectangular mounting frame; 3132. Roller; 32. Rotating structure; 33. Double degree of freedom control structure; 34. Liner rod centering adjustment structure; 341. Adjustment assembly; 3411. Fourth rectangular frame; 3412. Third screw rod; 3413. Fourth moving block; 3414. Push plate; 342. Opening and closing structure; 3421. First connecting plate; 3422. Second fixed shaft; 3423. Second connecting plate; 3424. Linear drive; 4. Linkage adjustment structure; 41. Connecting bracket; 42. Guide column; 43. Second connecting block; 44. Fifth moving block; 45. Spring. DETAILED DESCRIPTION

[0038] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] Reference Figures 1 to 12As shown: a steel structure welding equipment for bridge construction, a welding table 1, a bridge frame clamping mechanism 2, a lining rod clamping mechanism 3 and a linkage adjustment structure 4; welding table 1; the bridge frame clamping mechanism 2 is used to fix the upper and lower main beams of the bridge frame so that the middle surfaces of the upper and lower main beams are parallel to the middle surface of the welding table 1; the lining rod clamping mechanism 3 is arranged at the upper end of the bridge frame clamping mechanism 2, the lining rod clamping mechanism 3 includes a second clamping assembly 31, a rotating structure 32 and a double-degree-of-freedom control structure 33, the second clamping assembly 31 includes two clamping plates 311 and a third driving structure 312, the third driving structure 312 drives the two clamping plates 311 to move closer to or away from each other, the rotating structure 32 is used to rotate the lining rod clamped by the second clamping assembly 31, and the double-degree-of-freedom control structure 33 is used to drive the lining rod clamped by the second clamping assembly 31 to adjust in the horizontal and vertical directions; the linkage adjustment structure 4 has Two, two linkage adjustment structures 4 are respectively arranged at the two ends of the lining rod clamping mechanism 3, the linkage adjustment structure 4 makes the position of the lining rod clamping mechanism 3 change following the operation of the bridge frame clamping mechanism 2, the linkage adjustment structure 4 includes two connecting brackets 41, a guide column 42, a second connecting block 43, two fifth moving blocks 44 and two springs 45, the two connecting brackets 41 are parallel to each other, and the connecting brackets 41 are connected to the welding table 1, the two ends of the guide column 42 are respectively connected to the two connecting brackets 41, the second connecting block 43 is slidably arranged on the guide column 42, the lining rod clamping mechanism 3 is connected to the second connecting block 43, the two fifth moving blocks 44 are respectively arranged at the two ends of the second connecting block 43, and the fifth moving block 44 is slidably arranged on the guide column 42, the two springs 45 are both sleeved on the guide column 42, and the two ends of the spring 45 are respectively abutted against the second connecting block 43 and the fifth moving block 44.

[0040] The bridge frame is placed on the welding table 1, and the bridge frame clamping mechanism 2 fixes the bridge frame. During this process, the two fifth moving blocks 44 approach each other, and the two springs 45 are compressed. The two springs 45 push the second connecting block 43 to move on the guide column 42. When the second connecting block 43 stops moving, the forces on both sides of the second connecting block 43 are balanced, and the two springs 45 are compressed to the same stroke, so that the second connecting block 43 is at the same distance from the two fifth moving blocks 44 at any point on the conductor column. The second connecting block 43 drives the lining rod clamping mechanism 3 to move, so that the lining rod clamping mechanism 3 is located directly above the middle surface of the fixed bridge frame. The third driving structure 312 drives the two clamping plates 311 to clamp the lining rod from the middle of the lining rod, the rotating structure 32 adjusts the angle of the lining rod, and the dual-degree-of-freedom control structure 33 controls the movement of the lining rod in the horizontal and vertical directions to adjust the lining rod to a suitable position of the bridge frame. Due to the action of the linkage adjustment structure 4, when the lining rod is clamped by the second clamping assembly 31, the middle surface of the lining rod is coplanar with the middle surface of the bridge frame. After the lining rod is rotated, the two ends of the lining rod are flush with the surfaces opposite to the upper and lower main beams of the bridge frame, so that the lining rod can be directly placed between the upper and lower main beams of the bridge frame, thereby avoiding manual adjustment of the position of the lining rod on the bridge frame.

[0041] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown: the liner rod clamping mechanism 3 also includes a liner rod centering adjustment structure 34, and the liner rod centering adjustment structure 34 includes an adjustment component 341; there are two adjustment components 341, and the two adjustment components 341 are respectively arranged on both sides of the third driving structure 312, and the two adjustment components 341 are perpendicular to the third driving structure 312, and the two adjustment components 341 are used to adjust the distance between the two ends of the liner rod and the middle surface of the clamping plate 311, and the adjustment component 341 includes a fourth rectangular frame 3411, a third screw rod 3412, a fourth moving block 3413 and a push plate 3414, one end of the fourth rectangular frame 3411 is connected to the third driving structure 312, the two ends of the third screw rod 3412 are connected to the two ends of the fourth rectangular frame 3411, the fourth moving block 3413 is threadedly connected to the third screw rod 3412, and the push plate 3414 is connected to the fourth moving block 3413.

[0042] The lining rod clamping mechanism 3 is located directly above the middle surface of the bridge frame under the action of the linkage adjustment structure 4, and when the second clamping assembly 31 clamps the lining rod, the middle surface of the lining rod may not be coplanar with the middle surface of the bridge frame. By setting the lining rod centering adjustment structure 34, the two clamping plates 311 first clamp the lining rod, and then the two third screws 3412 rotate at the same time, and the third screw 3412 drives the fourth moving block 3413 to move, and the fourth moving block 3413 drives the push plate 3414 to move. After the push plate 3414 abuts against one end of the lining rod, the push plate 3414 pushes the lining rod to move. When the other end of the lining rod abuts against the other push plate 3414, the two third screws 3412 stop rotating. At this time, the clamping position of the two clamping plates 311 is the middle part of the lining rod, so that the middle surface of the lining rod is coplanar with the middle surface of the bridge frame.

[0043] Reference Figure 3 , Figure 4 and Figure 5 As shown: the liner rod clamping mechanism 3 also includes an opening and closing structure 342, and the opening and closing structure 342 is used to adjust the angle between the two adjustment components 341. The opening and closing structure 342 includes a first connecting plate 3421, two second fixed shafts 3422, two second connecting plates 3423 and a linear driver 3424. The first connecting plate 3421 is parallel to the welding table 1, and the two second fixed shafts 3422 are respectively connected to the two ends of the first connecting plate 3421, and the two second connecting plates 3423 are respectively connected to the two fourth rectangular frames 3411. A strip groove is opened on the second connecting plate 3423, and the second fixed shaft 3422 is slidably set in the strip groove. The linear driver 3424 is used to drive the first connecting plate 3421 to rise and fall.

[0044] The two push plates 3414 are clamped at both ends of the lining rod. When the lining rod is placed in the bridge frame, the push plates 3414 will have an obstructive effect. By setting the opening and closing structure 342, after the adjusting component 341 adjusts the position of the rear lining rod, the opening and closing structure 342 works, and the linear drive 3424 drives the first connecting plate 3421 to rise upward, and the first connecting plate 3421 drives the two second fixed shafts 3422 to rise at the same time, and the second fixed shafts 3422 slide in the strip groove, and the two second fixed shafts 3422 drive the two second connecting plates 3423 to move, and the two second connecting plates 3423 drive the two fourth rectangular frames 3411 to rotate, so that the angle between the two fourth rectangular frames 3411 is reduced, and the two push plates 3414 both rise upward, thereby preventing the adjusting component 341 from interfering with the placement of the lining rod in the bridge frame.

[0045] Reference Figure 3 and Figure 6As shown: the second clamping assembly 31 also includes a rolling structure 313, which has two rolling structures 313. The two rolling structures 313 are respectively arranged on two clamping plates 311. The two rolling structures 313 are used to clamp the lining rod. The rolling structure 313 includes a rectangular mounting frame 3131 and a plurality of rollers 3132. The rectangular mounting frame 3131 is arranged parallel to the clamping plate 311, and a plurality of rollers 3132 are arranged in a linear array on the rectangular mounting frame 3131.

[0046] When the two clamping plates 311 clamp the lining rod, there is a large friction between the clamping plates 311 and the lining rod, which makes it inconvenient for the push plate 3414 to push the lining rod to move. By setting the rolling structure 313, a number of rollers 3132 clamp the lining rod on both sides of the lining rod. The friction between the rollers 3132 and the lining rod is rolling friction, and the friction coefficient of rolling friction is small. When the force applied by the rollers 3132 to the lining rod is the same as the force applied by the clamping plates 311 to the lining rod, the friction resistance of the rollers 3132 to the movement of the lining rod is smaller, thereby facilitating the push plate 3414 to push the lining rod to move.

[0047] Reference Figure 1 , Figure 7 and Figure 8 As shown: the bridge frame clamping mechanism 2 includes a first clamping component 21 and a first driving structure 22; the first clamping component 21 has two, and the two first clamping components 21 are symmetrically arranged about the middle surface of the welding table 1, and the first clamping component 21 includes a clamping rod 211, two first moving blocks 212, two L-shaped clamping plates 213 and two elastic connection structures 214, the two first moving blocks 212 are respectively arranged at both ends of the clamping rod 211, the two L-shaped clamping plates 213 are respectively arranged on one side of the two first moving blocks 212, and the two elastic connection structures 214 are respectively arranged on the two first moving blocks 212, and the elastic connection structure 214 is used to connect the L-shaped clamping plates 213 and the first moving blocks 212; the first driving structure 22 has two, and the two first driving structures 2 2 are respectively arranged at both ends of the welding table 1, the two first driving structures 22 are used to drive the two first clamping components 21 to move closer to or away from each other, the first driving structure 22 includes two first rectangular frames 221, two first screw rods 222, two second moving blocks 223 and two first connecting blocks 224, the two first rectangular frames 221 are symmetrically arranged about the middle surface of the welding table 1, the two first screw rods 222 are respectively arranged in the two first rectangular frames 221, the two second moving blocks 223 are respectively threadedly connected with the two first screw rods 222, one end of the two first connecting blocks 224 is respectively connected with the two second moving blocks 223, the other end of the first connecting block 224 is connected to the clamping rod 211, and the other end of the first connecting block 224 is connected to the fifth moving block 44.

[0048] The bridge frame is placed on the welding table 1, and the first driving structure 22 works. The two first screws 222 rotate at the same time and drive the two second moving blocks 223 to move. The two second moving blocks 223 drive the two first connecting blocks 224 to approach each other. The two first connecting blocks 224 at both ends of the clamping rod 211 drive the clamping rod 211 to move toward the middle of the bridge frame. The clamping rod 211 drives the two first moving blocks 212 to move. The first moving block 212 pushes the L-shaped clamp plate 213 to move toward the bridge frame. The elastic connecting structure 214 can play a buffering role to avoid that after an L-shaped clamp plate 213 abuts against the bridge frame, one end of the clamping rod 211 is subjected to a large force. When the two L-shaped plates at both ends of the two clamping rods 211 abut against the bridge frame, the first driving structure 22 stops working, thereby realizing that the middle surface of the bridge frame is parallel to the middle surface of the welding table 1.

[0049] Reference Figure 8 and Fig. 9 As shown: the clamping rod 211 is a double-headed screw, and the bridge frame clamping mechanism 2 also includes a second driving structure 23. The second driving structure 23 is used to drive the two L-shaped clamps 213 located on the same clamping rod 211 to approach each other. The second driving structure 23 includes a synchronous transmission structure 231. The synchronous transmission structure 231 is used to transmit the rotation of one clamping rod 211 to another clamping rod 211. The synchronous transmission structure 231 includes two first transmission wheels 2311 and a transmission belt 2312. The two first transmission wheels 2311 are respectively connected to the two clamping rods 211, and the two ends of the transmission belt 2312 are respectively mounted on the two first transmission wheels 2311.

[0050] The driver drives a clamping rod 211 to rotate, and this clamping rod 211 drives the first transmission wheel 2311 connected to it to rotate, and the first transmission wheel 2311 drives another first transmission wheel 2311 to rotate through the transmission belt 2312, and this first transmission wheel 2311 drives the clamping rod 211 connected to it to rotate, so that the two clamping rods 211 rotate at the same time. When the clamping rod 211 rotates, the first moving blocks 212 at both ends of the clamping rod 211 approach each other. When the two L-shaped clamps 213 at one end of the bridge frame abut against the bridge frame, the two L-shaped clamps 213 push the bridge frame to move until the two ends of the bridge frame abut against the four L-shaped clamps 213, thereby fixing the bridge frame.

[0051] Reference Figure 7 , Figure 8 and Fig.10As shown: the second driving structure 23 also includes a transmission adjustment structure 232, which is used to keep the transmission effect of the synchronous transmission structure 231 unchanged when the positions of the two clamping rods 211 change. The transmission adjustment structure 232 includes a second rectangular frame 2321, a second screw rod 2322, a third moving block 2323, a first fixed shaft 2324 and a second transmission wheel 2325. The transmission belt 2312 has two, the second rectangular frame 2321 is located between the two first rectangular frames 221, and the two ends of the second screw rod 2322 are respectively connected to the second rectangular frame 232 1, the third moving block 2323 is threadedly connected to the second screw rod 2322, the axis of the first fixed shaft 2324 is parallel to the axis of the clamping rod 211, one end of the first fixed shaft 2324 is connected to the third moving block 2323, the second transmission wheel 2325 is connected to the first fixed shaft 2324 through a bearing, the two ends of one transmission belt 2312 are respectively sleeved on the first transmission wheel 2311 and the second transmission wheel 2325, and the two ends of another transmission belt 2312 are respectively sleeved on the other first transmission wheel 2311 and the second transmission wheel 2325.

[0052] Since the distance between the two clamping rods 211 will change, relying solely on a transmission belt 2312 cannot ensure that one clamping rod 211 drives the other clamping rod 211 to rotate. By setting a transmission adjustment structure 232, when the two clamping rods 211 approach each other, the second screw 2322 rotates, and the third moving block 2323 moves away from the clamping rod 211 along the second screw 2322. The first fixed shaft 2324 follows the movement of the third moving block 2323, so that the straight-line distance between the first fixed shaft 2324 and the clamping rod 211 remains unchanged, and the surface tension of the transmission belt 2312 remains unchanged, thereby maintaining the rotational force that can be transmitted from one clamping rod 211 to the other clamping rod 211.

[0053] Reference Figure 8 and Fig.11 As shown: the first clamping structure also includes a clip structure 215, which has two clip structures 215. The clip structure 215 is arranged between the first moving block 212 and the L-shaped clamp 213. The clip structure 215 is used to connect the first moving block 212 and the L-shaped clamp 213. The clip structure 215 includes a protrusion 2151 and a recessed block 2152. The protrusion 2151 is connected to the first moving block 212, and the recessed block 2152 is connected to the L-shaped clamp 213. The protrusion 2151 can be clipped into the recessed block 2152.

[0054] When the first moving block 212 drives the L-shaped clamp 213 to push the bridge frame to move, the elastic connection structure 214 will be subjected to a large lateral force, which may easily cause damage to the elastic connection structure 214. By setting the clamping structure 215, when the first clamping assembly 21 makes the middle surface of the bridge frame parallel to the middle surface of the welding platform 1, the L-shaped clamp 213 abuts against the bridge frame, and the clamping rod 211 continues to move toward the bridge frame. The protrusion 2151 is inserted into the recessed block 2152, so that the L-shaped clamp 213 and the first moving block 212 are connected as a whole. When the first moving block 212 moves along the clamping rod 211, the L-shaped clamp 213 is driven to move by the force between the protrusion 2151 and the recessed block 2152, so that the elastic connection structure 214 will not be subjected to the force along the axis direction of the clamping rod 211.

[0055] Reference Figure 7 , Fig.10 and Fig.12 As shown: the bridge frame clamping mechanism 2 also includes a synchronous drive structure 24, which is used to drive the first drive structure 22 and the second drive structure 23 to move simultaneously. The synchronous drive structure 24 includes a third rectangular frame 241, a rotation driver 242, a first bevel gear 243, two second bevel gears 244 and a third bevel gear 245. One side of the third rectangular frame 241 is connected to the welding table 1, and the two symmetrical sides of the third rectangular frame 241 are respectively connected to the two first rectangular frames 221, and the remaining side of the third rectangular frame 241 is connected to the second rectangular frame 2321. One end of the first screw 222 and one end of the second screw 2322 both extend into the third rectangular frame 241. The rotation driver 242 is arranged on one side of the third rectangular frame 241, the first bevel gear 243 is connected to the rotation driver 242, the two second bevel gears 244 are respectively connected to the two first screws 222, and the third bevel gear 245 is connected to the second screw 2322.

[0056] The rotation driver 242 drives the first bevel gear 243 to rotate, and the first bevel gear 243 simultaneously drives the two second bevel gears 244 and the third bevel gear 245 to rotate, the two first bevel gears 243 respectively drive the two first screws 222 to rotate, and the third bevel gear 245 drives the second screw 2322 to rotate, thereby achieving simultaneous driving of the first drive structure 22 and the second drive structure 23 to work.

[0057] A method for welding steel structure equipment for bridge construction, comprising the following steps:

[0058] S1, placing the bridge frame on the welding table 1, the two first driving structures 22 drive the two first clamping assemblies 21 to clamp the bridge frame from one direction of the bridge frame, and the second driving structure 23 drives the two first clamping assemblies 21 to clamp the bridge frame from another direction of the bridge frame, so that two degrees of freedom of the bridge frame are restricted;

[0059] S2, in the process of the two first driving structures 22 driving the two first clamping assemblies 21 to clamp the bridge frame, the two linkage adjustment structures 4 adjust the position of the lining rod clamping mechanism 3 so that the second clamping assembly 31 is located directly above the middle surface of the bridge frame;

[0060] S3, the second clamping assembly 31 clamps the liner rod, and the two adjustment assemblies 341 adjust the position of the liner rod;

[0061] S4, the opening and closing structure 342 drives the two adjustment components 341 away from the lining rod;

[0062] S5, after the rotating structure 32 adjusts the angle between the lining rod and the bridge frame support, the dual-degree-of-freedom control structure 33 places the lining rod on the bridge frame, and the external welding robot welds the connection between the lining rod and the bridge frame.

[0063] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A steel structure welding equipment for bridge construction, characterized in that: A welding platform (1), a bridge frame clamping mechanism (2), a lining rod clamping mechanism (3) and a linkage adjustment structure (4); Welding table (1); The bridge frame clamping mechanism (2) is used to fix the upper and lower main beams of the bridge frame so that the middle surfaces of the upper and lower main beams are parallel to the middle surface of the welding platform (1); The lining rod clamping mechanism (3) is arranged at the upper end of the bridge frame clamping mechanism (2), and the lining rod clamping mechanism (3) comprises a second clamping assembly (31), a rotating structure (32) and a dual-degree-of-freedom control structure (33). The second clamping assembly (31) comprises two clamping plates (311) and a third driving structure (312). The third driving structure (312) drives the two clamping plates (311) to move closer to or farther from each other. The rotating structure (32) is used to rotate the lining rod clamped by the second clamping assembly (31). The dual-degree-of-freedom control structure (33) is used to drive the lining rod clamped by the second clamping assembly (31) to adjust in the horizontal direction and the vertical direction. There are two linkage adjustment structures (4), and the two linkage adjustment structures (4) are respectively arranged at two ends of the lining rod clamping mechanism (3), and the linkage adjustment structures (4) enable the position of the lining rod clamping mechanism (3) to change in accordance with the operation of the bridge frame clamping mechanism (2); The liner rod clamping mechanism (3) further comprises a liner rod centering adjustment structure (34), and the liner rod centering adjustment structure (34) comprises an adjustment component (341); There are two adjustment assemblies (341), which are respectively arranged on both sides of the third driving structure (312), and the two adjustment assemblies (341) are perpendicular to the third driving structure (312), and the two adjustment assemblies (341) are used to adjust the distance between the two ends of the lining rod and the middle surface of the clamping plate (311); The liner rod clamping mechanism (3) further comprises an opening and closing structure (342), and the opening and closing structure (342) is used to adjust the angle between the two adjustment components (341); The bridge frame clamping mechanism (2) comprises a first clamping assembly (21) and a first driving structure (22); The first clamping assembly (21) has two components, the two first clamping assemblies (21) are symmetrically arranged about the middle surface of the welding table (1), the first clamping assembly (21) comprises a clamping rod (211), two first moving blocks (212), two L-shaped clamping plates (213) and two elastic connection structures (214), the two first moving blocks (212) are respectively arranged at two ends of the clamping rod (211), the two L-shaped clamping plates (213) are respectively arranged on one side of the two first moving blocks (212), the two elastic connection structures (214) are respectively arranged on the two first moving blocks (212), and the elastic connection structures (214) are used to connect the L-shaped clamping plates (213) and the first moving blocks (212); There are two first drive structures (22), the two first drive structures (22) are respectively arranged at two ends of the welding table (1), and the two first drive structures (22) are used to drive the two first clamping assemblies (21) to move closer to or farther from each other; The linkage adjustment structure (4) comprises two connecting brackets (41), a guide column (42), a second connecting block (43), two fifth moving blocks (44) and two springs (45). The two connecting brackets (41) are parallel to each other and the connecting brackets (41) are connected to the welding table (1). The two ends of the guide column (42) are respectively connected to the two connecting brackets (41). The second connecting block (43) is slidably arranged on the guide column (42). The lining rod clamping mechanism (3) is connected to the second connecting block (43). The two fifth moving blocks (44) are respectively arranged at the two ends of the second connecting block (43), and the fifth moving block (44) is slidably arranged on the guide column (42). The two springs (45) are both sleeved on the guide column (42), and the two ends of the spring (45) are respectively in contact with the second connecting block (43) and the fifth moving block (44). The first driving structure (22) comprises two first rectangular frames (221), two first screw rods (222), two second moving blocks (223) and two first connecting blocks (224); the two first rectangular frames (221) are symmetrically arranged about the middle surface of the welding table (1); the two first screw rods (222) are respectively arranged in the two first rectangular frames (221); the two second moving blocks (223) are respectively threadedly connected to the two first screw rods (222); one end of the two first connecting blocks (224) is respectively connected to the two second moving blocks (223); the other end of the first connecting block (224) is connected to the clamping rod (211); and the other end of the first connecting block (224) is connected to the fifth moving block (44).

2. The steel structure welding equipment for bridge construction according to claim 1 is characterized in that: The second clamping assembly (31) further comprises a rolling structure (313). The rolling structures (313) are provided with two rolling structures (313). The two rolling structures (313) are respectively arranged on the two clamping plates (311). The two rolling structures (313) are used to clamp the lining rod.

3. The steel structure welding equipment for bridge construction according to claim 2 is characterized in that: The clamping rod (211) is a double-headed screw rod. The bridge frame clamping mechanism (2) further includes a second drive structure (23), which is used to drive two L-shaped clamping plates (213) located on the same clamping rod (211) to approach each other. The second drive structure (23) includes a synchronous transmission structure (231), which is used to transmit the rotation of one clamping rod (211) to another clamping rod (211).

4. The steel structure welding equipment for bridge construction according to claim 3 is characterized in that: The second driving structure (23) further comprises a transmission adjustment structure (232), wherein the transmission adjustment structure (232) is used to keep the transmission effect of the synchronous transmission structure (231) unchanged when the positions of the two clamping rods (211) change.

5. The steel structure welding equipment for bridge construction according to claim 4 is characterized in that: The first clamping assembly (21) further comprises a clamping structure (215), which comprises two clamping structures (215). The clamping structures (215) are arranged between the first moving block (212) and the L-shaped clamping plate (213), and the clamping structures (215) are used to connect the first moving block (212) and the L-shaped clamping plate (213).

6. The steel structure welding equipment for bridge construction according to claim 5 is characterized in that: The bridge frame clamping mechanism (2) further comprises a synchronous drive structure (24), wherein the synchronous drive structure (24) is used to drive the first drive structure (22) and the second drive structure (23) to move simultaneously.

7. A method for welding steel structure equipment for bridge construction, applied to the welding steel structure equipment for bridge construction as claimed in any one of claims 3 to 6, characterized in that: The following steps are involved: S1, placing the bridge frame on the welding table (1), the two first driving structures (22) driving the two first clamping assemblies (21) to clamp the bridge frame from one direction of the bridge frame, and the second driving structure (23) driving the two first clamping assemblies (21) to clamp the bridge frame from another direction of the bridge frame, so that two degrees of freedom of the bridge frame are restricted; S2, when the two first driving structures (22) drive the two first clamping assemblies (21) to clamp the bridge frame, the two linkage adjustment structures (4) adjust the position of the lining rod clamping mechanism (3) so that the second clamping assembly (31) is located directly above the middle surface of the bridge frame; S3, the second clamping assembly (31) clamps the lining rod, and the two adjustment assemblies (341) adjust the position of the lining rod; S4, the opening and closing structure (342) drives the two adjustment components (341) away from the lining rod; S5, after the rotating structure (32) adjusts the angle between the lining rod and the bridge frame support, the dual-degree-of-freedom control structure (33) places the lining rod on the bridge frame, and the external welding robot welds the connection between the lining rod and the bridge frame.

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