A welding positioning tool for steel structure bridge components

Abstract

The present invention discloses a welding positioning tool for steel structure bridge components, which relates to the technical field of bridge construction; it is characterized in that a welding platform is rotatably installed on a base, and a guardrail column is placed in the central area of ​​the welding platform; both ends of the welding platform are respectively provided with a top fixing structure against the outside of a support plate; both sides of the support frame are respectively provided with a lifting structure, and the lifting structure is connected to a tilting structure; an axial lock is connected to a telescopic structure, and the telescopic structure is connected to a clamping structure, the clamping structure is inserted between two support plates, the clamping structure is clamped on an auxiliary plate, and the tilting structure is used to coordinate and adjust the position of the clamping structure according to the tilting direction of the guardrail column. The device can splice and fix the guardrail column, and can flip the guardrail column in an upright state, which greatly facilitates the welding work.

Description

Technical Field

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

[0002] Bridges generally refer to structures built on rivers, lakes, and seas to allow vehicles and pedestrians to pass smoothly. In order to adapt to the modern high-speed development of the transportation industry, bridges are also extended to buildings that cross mountain streams, poor geology, or meet other transportation needs to make passage more convenient. In order to have a safer and more stable structure, modern bridges use a large number of steel structural components. Bridge guardrails are a type of steel structural component that needs to be used in large quantities in bridge construction.

[0003] The bridge guardrail bracket refers to the guardrail installed on the shoulder of the bridge highway. The purpose is to prevent out-of-control vehicles from going off the road, to avoid collisions with other roadside facilities and vehicles rolling off the bridge. The bridge guardrail bracket is a type of steel structure bridge component. For super-large bridges, large bridges and medium bridges on high-grade highways such as expressways and first-class highways, they should be installed unconditionally. Other bridges should also be equipped with bridge guardrail brackets if conditions permit. The common guardrail columns in modern road and bridge construction are composed of two front and rear arc-shaped support plates. Ribs perpendicular to the two support plates are arranged between the support plates, and shaft sleeves are arranged at the corresponding positions on the columns according to the installation requirements of the crossbars.

[0004] Guardrail posts are generally processed by integral casting or welding. During welding, it is necessary to first use welding positioning tools to splice and clamp each part of the plate separately before welding. After completing the welding on one side, it is necessary to turn the post over as a whole and then weld the other side. However, in order to have sufficient impact resistance, the post itself uses a large amount of steel. Each plate is very heavy, and it is very difficult to carry and splice. After welding on one side, the staff needs to turn over the initially formed post as a whole, which further increases the physical burden and causes inconvenience in welding. Summary of the invention

[0005] The purpose of the present invention is to provide a welding and positioning tool for steel structure bridge components to solve the problems raised in the above background technology. A welding tool capable of fixing steel structure guardrail columns is proposed, which can directly weld each surface after fixing, without the need for manual flipping during welding, thus reducing the difficulty of processing.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A welding positioning tool for steel structure bridge components, comprising a base; a welding platform is rotatably mounted on the base, a support frame is fixedly mounted on the welding platform, a guardrail column is placed in the central area of ​​the welding platform, the guardrail column comprises two opposing support plates, a rib plate is connected between the support plates, and auxiliary plates are respectively arranged on both sides of the rib plate; top fixing structures are respectively arranged at both ends of the welding platform, which are against the outside of the support plate; lifting structures are respectively arranged on both sides of the support frame, and the lifting structures are connected to the tilting structure;

[0008] The lifting structure comprises a lifting seat parallel to the base, and sliding sleeves are rotatably installed at both ends of the lifting seat; the tilting structure comprises two sliding rods penetrating the sliding sleeves, and the two ends of the sliding rods are respectively connected to the pushing block and the auxiliary block, and the sliding rods, the pushing block and the auxiliary block form a parallelogram structure, and a support rod parallel to the sliding rod is connected between the pushing block and the auxiliary block, and a plurality of axial lock buckles are installed on the support rod;

[0009] The axial lock is connected to the telescopic structure, the telescopic structure is connected to the clamping structure, the clamping structure is inserted between two support plates, the clamping structure is clamped on the auxiliary plate, and the inclined structure is used to adjust the position of the clamping structure according to the inclination direction of the guardrail column.

[0010] As a further solution of the present invention: vertical plates are installed on both sides of the support frame, an auxiliary frame is installed on the side of the vertical plate close to the center of the welding platform, the top fixing structure includes a plurality of threaded barrels arranged on the vertical plates and the auxiliary frames, and the top fixing structure includes a top fixing screw passing through the threaded barrel.

[0011] As a further solution of the present invention: the top fixing screw is connected to a top fixing plate through a ball joint, the top fixing plate is against the outer surface of the support plate, a limit block is installed between the top fixing plate and the ball joint, a plurality of through grooves are opened on the limit block, and the top fixing structure includes a limit frame, and the limit frame passes through the through grooves of a plurality of limit blocks located on the same side.

[0012] As a further solution of the present invention: the lifting structure includes two lifting screws installed parallel to each other on the welding platform, the lifting seat is sleeved on the lifting screws and meshed with the lifting screw threads, a driving gear is installed on the support frame, a transmission gear is installed on the lifting screw, the driving gear is meshed with the transmission gear, and the driving gear is connected to the rotating rod.

[0013] As a further solution of the present invention: a tilting screw is transversely arranged on the welding platform, the pushing block is threadedly connected to the tilting screw, and an adjusting rod is slidably installed at one end of the tilting screw.

[0014] As a further solution of the present invention: the telescopic structure includes a square tube, extension rods are slidably inserted at both ends of the square tube, a bidirectional screw is installed inside the square tube, both ends of the bidirectional screw are respectively inserted into the extension rods located at both ends and are threadedly connected to the extension rods, and an adjusting wheel protruding from the outside of the square tube is provided in the middle of the square tube, and the adjusting wheel is connected to the bidirectional screw.

[0015] As a further solution of the present invention: the extension rod is respectively connected to the axial locking buckle and the clamping structure, the clamping structure includes a ball sleeve connected to the extension rod, a rotating ball is rotatably installed inside the ball sleeve, a brake plate that fits the rotating ball is slidably installed inside the ball sleeve, a locking screw that passes through the ball sleeve is rotatably installed on the brake plate, and the locking screw is threadedly connected to the ball sleeve.

[0016] As a further solution of the present invention: the rotating ball is connected to a fixed clamping plate, a movable clamping plate is arranged on the fixed clamping plate, a clamping screw is rotatably mounted on the movable clamping plate, and the clamping screw passes through the movable clamping plate and is threadedly connected to the fixed clamping plate.

[0017] As a further solution of the present invention: a positioning screw is threadedly connected to one side of the welding platform, and the positioning screw passes through the welding platform and abuts against the surface of the base.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The above-mentioned welding positioning tooling for steel structure bridge components is adopted. The device uses the coordination of various parts of the structure to assemble various parts of the guardrail column and assemble the guardrail column into a vertical shape, so that the operator can perform welding operations at a higher height without squatting on the ground to operate, which is more comfortable and convenient to operate.

[0020] By adopting the welding positioning tooling for steel structure bridge components, the device can splice and form the guardrail columns without covering each weld, and because the spliced ​​columns are fixed on the welding platform, after completing the welding on one side, the unwelded area on the other side can be rotated in front of the operator by rotating the welding platform as needed, which is convenient for the operator to weld efficiently, and there is no need to manually flip the guardrail columns during the welding process, which reduces the physical burden;

[0021] The above-mentioned steel structure bridge component welding positioning tooling is adopted. The device is respectively provided with a top fixing structure that can abut against the support plate at both ends. The clamping structures located on both sides can change the height and its own lateral position, and can be extended and retracted. Therefore, for guardrail columns with various strange shapes and unique rib shapes, the device can be fixed with flexible structural cooperation. The clamping structure can be used to fix the auxiliary plate used for reinforcement, or it can be directly fixed on the rib plate, or the built-in cross plate can be clamped between the two support plates to strengthen the support plate. The device can meet the welding reinforcement of guardrail columns of various shapes and different forms with or without auxiliary plates, and is flexible and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of the welding positioning tooling for steel structure bridge components.

[0023] Figure 2 This is a structural schematic diagram of the top fixing structure and guardrail columns in the welding positioning tooling for steel structure bridge components.

[0024] Figure 3 This is a schematic diagram of the structure of the side clamping of the guardrail column in the welding positioning tooling of the steel structure bridge component.

[0025] Figure 4 This is a structural schematic diagram of the lifting structure, tilting structure and clamping structure in the welding positioning tooling for steel structure bridge components.

[0026] Figure 5 This is a structural schematic diagram of the inclined structure and clamping structure in the welding positioning tooling for steel structure bridge components.

[0027] Figure 6 This is a schematic diagram of the telescopic structure in the welding positioning tooling for steel structure bridge components.

[0028] Figure 7 This is a schematic diagram of the clamping structure in the welding positioning tooling for steel structure bridge components.

[0029] In the figure: 1. base; 11. welding platform; 12. positioning screw; 13. support frame; 131. vertical plate; 132. auxiliary frame; 2. top fixing structure; 21. top fixing screw; 22. threaded cylinder; 23. top fixing plate; 24. limit frame; 25. ball joint; 26. limit block; 261. through groove; 3. lifting structure; 31. lifting screw; 311. transmission gear; 32. lifting seat; 321. sliding sleeve; 33. driving gear; 331. rotating rod; 4. tilting structure; 41 , sliding rod; 42, supporting rod; 43, pushing block; 44, tilting screw; 45, auxiliary block; 46, adjusting rod; 5, axial locking buckle; 6, telescopic structure; 61, square tube; 62, extension rod; 63, bidirectional screw; 64, adjusting wheel; 7, clamping structure; 71, ball sleeve; 72, rotating ball; 73, brake plate; 74, locking screw; 75, fixed clamping plate; 76, dynamic clamping plate; 77, clamping screw; 8, guardrail column; 81, auxiliary plate; 82, support plate; 83, rib plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 7 In an embodiment of the present invention, a welding positioning tool for a steel structure bridge member includes a base 1; a welding platform 11 is rotatably mounted on the base 1, a support frame 13 is fixedly mounted on the welding platform 11, a guardrail column 8 is placed in the central area of ​​the welding platform 11, and the guardrail column 8 includes two opposite support plates 82, a rib plate 83 is connected between the support plates 82, and auxiliary plates 81 are respectively arranged on both sides of the rib plate 83; top fixing structures 2 are respectively arranged at both ends of the welding platform 11, which are against the outside of the support plate 82; lifting structures 3 are respectively arranged on both sides of the support frame 13, and the lifting structure 3 is connected to the inclined structure 4;

[0032] The lifting structure 3 includes a lifting seat 32 parallel to the base 1, and sliding sleeves 321 are rotatably installed at both ends of the lifting seat 32; the tilting structure 4 includes two sliding rods 41 penetrating the sliding sleeves 321, and the two ends of the sliding rods 41 are respectively connected to the pushing block 43 and the auxiliary block 45, and the sliding rod 41, the pushing block 43 and the auxiliary block 45 form a parallelogram structure, and a support rod 42 parallel to the sliding rod 41 is connected between the pushing block 43 and the auxiliary block 45, and a plurality of axial lock buckles 5 are installed on the support rod 42;

[0033] The axial lock 5 is connected to the telescopic structure 6, the telescopic structure 6 is connected to the clamping structure 7, the clamping structure 7 is inserted between two support plates 82, the clamping structure 7 is clamped on the auxiliary plate 81, and the inclined structure 4 is used to adjust the position of the clamping structure 7 according to the inclination direction of the guardrail column 8.

[0034] The device uses the base 1 as a support, and the welding platform 11 can rotate relative to the base 1. The support plate 82, rib plate 83 and auxiliary plate 81 required for welding the guardrail column 8 are directly spliced ​​on the welding platform 11 into the shape of the guardrail column 8, and remain in a vertical state. The structure used to support and reinforce each part of the structure will not cause the weld to be blocked, so the staff can directly complete the welding of one side of the guardrail column 8 on one side of the device. After the welding is completed, the welding platform 11 is rotated to weld the other side. It should be noted that the guardrail column 8 used in the device is only used as a functional display of other structures in the device, to assist in locating the connection relationship of each part of the structure, and to display and explain. The specific structure of the guardrail column 8 is not limited by the drawings and text descriptions. In addition to the guardrail column 8 mentioned in the device, the device can also meet the fixation of various different types of guardrail columns 8 or other structures spliced ​​by steel structure plates of various shapes.

[0035] The top fixing structure 2 located on both sides of the support frame 13 rests on the support plate 82 from the outside to limit the position and shape of the support plate 82. The internal ribs 83 are fixed in position while providing support from the inside for the support plates 82 on both sides. The lifting structure 3 is used to change the height of the axis of the tilting structure 4 when it rotates. The tilting structure 4 can be tilted at a certain angle, which acts on the axial lock buckle 5, so that the axial lock buckle 5 can adapt its height and lateral position as needed. For the sake of aesthetics and improving impact resistance, the guardrail column 8 may be set to a structure with a certain tilt angle. Therefore, the use of the tilting structure 4 can better fit the guardrail column 8, so that the clamping structure 7 can be inserted into the area between the support plates 82. The clamping structure 7 itself can be telescopically moved relative to the guardrail post 8, and can also rotate, so the clamping structure 7 can be used to fix the auxiliary plate 81, and the auxiliary plate 81 is not a necessary structure of the guardrail post 8. For the guardrail post 8 without the auxiliary plate 81, the clamping structure 7 can also be telescoped inward to rest against the surface of the rib plate 83, so as to enhance the fixing effect of the rib plate 83. In addition, the auxiliary tool for support can be directly clamped on the clamping structure 7, and placed between the two support plates 82 instead of the auxiliary plate 81 to provide support for the support plate 82.

[0036] As another embodiment of the present invention, please refer to Figure 1 and Figure 2, vertical plates 131 are installed on both sides of the support frame 13, and an auxiliary frame 132 is installed on one side of the vertical plate 131 close to the center of the welding platform 11. The top fixing structure 2 includes a plurality of threaded barrels 22 arranged on the vertical plates 131 and the auxiliary frame 132, and the top fixing structure 2 includes a top fixing screw 21 that penetrates the threaded barrel 22. The vertical plate 131 cooperates with the auxiliary frame 132 to support the top fixing screw 21 at multiple points to maintain the stability of the top fixing screw 21. By rotating the top fixing screw 21, the top fixing screw 21 can be moved to the middle and abut against the support plate 82.

[0037] See also Figure 1 and Figure 2 The top fixing screw 21 is connected to the top fixing plate 23 through the ball joint 25, and the top fixing plate 23 is against the outer surface of the support plate 82. A limit block 26 is installed between the top fixing plate 23 and the ball joint 25. The limit block 26 has multiple through grooves 261. The top fixing structure 2 includes a limit frame 24, and the limit frame 24 passes through the through grooves 261 of multiple limit blocks 26 located on the same side. The top fixing plate 23 directly contacts the support plate 82, and the top fixing plate 23 is connected to the top fixing screw 21 through the ball joint 25. Therefore, when the top fixing plate 23 cannot rotate, it does not affect the rotation adjustment of the top fixing screw 21, and the top fixing plate 23 itself can be tilted at a certain angle to fully fit the curved surface of the support plate 82. The limit frame 24 passes through the through groove 261 to connect multiple top fixing plates 23. Since each top fixing plate 23 is not located at the same horizontal position in the vertical plane, the distance of the connecting line is in a dynamically changing state. The length of the limit frame 24 needs to be greater than the spacing of the top fixing screws 21. The limit frame 24 connects multiple top fixing plates 23 to prevent the top fixing plates 23 from rotating under the rotation of the top fixing screws 21.

[0038] See also Figure 1 , Figure 3 and Figure 4 The lifting structure 3 includes two lifting screws 31 installed parallel to each other on the welding platform 11, the lifting seat 32 is sleeved on the lifting screws 31 and threadedly meshed with the lifting screws 31, the support frame 13 is equipped with a driving gear 33, the lifting screw 31 is equipped with a transmission gear 311, the driving gear 33 meshes with the transmission gear 311, and the driving gear 33 is connected to the rotating rod 331. The lifting structure 3 drives the transmission gear 311 through the driving gear 33 to rotate the lifting screw 31, thereby realizing the height control with the lifting seat 32, and the rotating rod 331 is used to drive the driving gear 33. The rotating rod 331 is a manual control structure, and can also be replaced by an automatically controlled motor or the like. The lifting structure 3 used in this device does not belong to a restrictive structure. In addition to using multiple lifting screws 31 for synchronous control, it can also be replaced by a structure in which one lifting screw 31 cooperates with multiple smooth rods 41 to limit and drive together.

[0039] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 , a tilting screw 44 is horizontally arranged on the welding platform 11, the pushing block 43 is threadedly connected to the tilting screw 44, and an adjusting rod 46 is slidably installed at one end of the tilting screw 44. The tilting screw 44 is located at the bottom of the welding platform 11, and the tilting screw 44 can be rotated by the driving of the adjusting rod 46, thereby changing the position of the pushing block 43 at the bottom. Since the pushing block 43, the auxiliary block 45 and the slide bar 41 form a parallelogram, the tilt angle of the slide bar 41 and the support rod 42 can be changed by changing the position of the bottom pushing block 43.

[0040] See also Figure 1 and Figure 6 The telescopic structure 6 comprises a square tube 61, and an extension rod 62 is slidably inserted at both ends of the square tube 61. A bidirectional screw 63 is installed inside the square tube 61. The two ends of the bidirectional screw 63 are respectively inserted into the extension rod 62 at both ends and are threadedly connected with the extension rod 62. An adjusting wheel 64 protruding from the outside of the square tube 61 is provided in the middle of the square tube 61, and the adjusting wheel 64 is connected to the bidirectional screw 63. The extension rod 62 is embedded in the square tube 61 and cannot rotate, but can slide under the action of the bidirectional screw 63. By operating the adjusting wheel 64 to rotate, the bidirectional screw 63 is driven to control the extension and contraction of the extension rod 62, thereby changing the length of the telescopic structure 6. The telescopic structure 6 of the device itself will not cause torsion between the two ends while adjusting, and will limit rotation. Therefore, while the device is telescopic, it can also limit the angle of the clamping structure 7 and provide stable support for the tilted auxiliary plate 81. The specific form of the telescopic structure 6 is not restrictive. In addition to using the structure adopted in the device, it can also be replaced by a hydraulic rod or other telescopic structures.

[0041] See also Figure 1 and Figure 7, the extension rod 62 is respectively connected to the axial lock buckle 5 and the clamping structure 7, the clamping structure 7 includes a ball sleeve 71 connected to the extension rod 62, a rotating ball 72 is rotatably installed inside the ball sleeve 71, a brake plate 73 that fits the rotating ball 72 is slidably installed inside the ball sleeve 71, a locking screw 74 that passes through the ball sleeve 71 is rotatably installed on the brake plate 73, and the locking screw 74 is threadedly connected to the ball sleeve 71. The axial lock buckle 5 used in the present device is a structure that can be installed on a rod, can slide relative to the rod, and can be fixed at a desired position. Since such a structure is very common and has a wide variety of types, and has a large number of finished product structures that can be processed in batches, no specific structural restrictions are made. The axial lock 5 limits the position of the clamping structure 7, the telescopic structure 6 realizes the lateral movement of the clamping structure 7, and the ball sleeve 71 cooperates with the rotating ball 72 to enable the clamping structure 7 to rotate left and right. After rotating to a suitable angle, the locking screw 74 is rotated to press the brake plate 73 against the surface of the rotating ball 72, so that the clamping structure 7 can be locked at the current angular position.

[0042] See also Figure 1 and Figure 7 The rotating ball 72 is connected to the fixed clamping plate 75, and the fixed clamping plate 75 is provided with a movable clamping plate 76, and the movable clamping plate 76 is rotatably mounted with a clamping screw 77, and the clamping screw 77 passes through the movable clamping plate 76 and is threadedly connected to the fixed clamping plate 75. The fixed clamping plate 75 is fixedly connected to the rotating ball 72, and the movable clamping plate 76 is height-adjustable under the action of the clamping screw 77, and is used to clamp the auxiliary plate 81, or directly use the front section of the fixed clamping plate 75 and the movable clamping plate 76 to press the rib plate 83.

[0043] See also Figures 1 to 3 A positioning screw 12 is threadedly connected to one side of the welding platform 11, and the positioning screw 12 passes through the welding platform 11 and abuts against the surface of the base 1. The positioning screw 12 is only used as an improved structure. By pressing the base 1 with the positioning screw 12, the welding platform 11 can be fixed at a corresponding angle after rotating the welding platform 11, so as to avoid the guardrail column 8 from rotating during the welding process and affecting the welding effect.

[0044] The working principle of the present invention is:

[0045] The device is provided with a rotatable welding platform 11 on the base 1, and the two ends of the support frame 13 on the welding platform 11 are installed with a top fixing structure 2 that can press the guardrail column 8 from both ends. At the same time, the lifting structures 3 on both sides can control the height of the lifting seat 32. The tilting structure 4 connected to the lifting seat 32 is connected to the clamping structure 7 through the telescopic structure 6, so that the position of the clamping structure 7 can be adjusted according to the needs. The clamping structure 7 can be inserted between the two support plates 82 to provide auxiliary support and limit effects for the auxiliary plate 81, the rib plate 83 and the support plate 82. The device can realize the support and fixation of the various parts of the guardrail column 8 without blocking the weld, so that the operator can quickly complete the welding, and after the welding of one side is completed, it is only necessary to rotate the welding platform 11 to weld the other side, without manual flipping, which greatly improves the convenience of welding work.

[0046] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A welding positioning tool for steel structure bridge components, comprising a base; characterized in that: A welding platform is rotatably mounted on the base, a support frame is fixedly mounted on the welding platform, a guardrail column is placed in the central area of ​​the welding platform, the guardrail column includes two opposing support plates, a rib plate is connected between the support plates, and auxiliary plates are respectively arranged on both sides of the rib plate; top fixing structures are respectively arranged at both ends of the welding platform, which are against the outside of the support plate; lifting structures are respectively arranged on both sides of the support frame, and the lifting structures are connected to the tilting structure; The lifting structure comprises a lifting seat parallel to the base, and sliding sleeves are rotatably installed at both ends of the lifting seat; the tilting structure comprises two sliding rods penetrating the sliding sleeves, and the two ends of the sliding rods are respectively connected to the pushing block and the auxiliary block, and the sliding rods, the pushing block and the auxiliary block form a parallelogram structure, and a support rod parallel to the sliding rod is connected between the pushing block and the auxiliary block, and a plurality of axial lock buckles are installed on the support rod; The axial lock is connected to the telescopic structure, the telescopic structure is connected to the clamping structure, the clamping structure is inserted between two support plates, the clamping structure is clamped on the auxiliary plate, and the inclined structure is used to adjust the position of the clamping structure according to the inclination direction of the guardrail column.

2. The welding positioning tool for steel structure bridge components according to claim 1 is characterized in that: Vertical plates are installed on both sides of the support frame, an auxiliary frame is installed on the side of the vertical plate close to the center of the welding platform, the top fixing structure includes a plurality of threaded barrels arranged on the vertical plates and the auxiliary frames, and the top fixing structure includes a top fixing screw that penetrates the threaded barrel.

3. The welding positioning tool for steel structure bridge components according to claim 2 is characterized in that: The top fixing screw is connected to a top fixing plate through a ball joint, the top fixing plate is against the outer surface of the support plate, a limit block is installed between the top fixing plate and the ball joint, a plurality of through grooves are opened on the limit block, and the top fixing structure includes a limit frame, and the limit frame passes through the through grooves of a plurality of limit blocks located on the same side.

4. The welding positioning tool for steel structure bridge components according to claim 1 is characterized in that: The lifting structure includes two lifting screws installed parallel to each other on the welding platform. The lifting seat is sleeved on the lifting screws and meshed with the lifting screw threads. A driving gear is installed on the support frame. A transmission gear is installed on the lifting screw. The driving gear meshes with the transmission gear, and the driving gear is connected to the rotating rod.

5. The welding positioning tool for steel structure bridge components according to claim 1 is characterized in that: A tilting screw is transversely arranged on the welding platform, the pushing block is threadedly connected to the tilting screw, and an adjusting rod is slidably mounted on one end of the tilting screw.

6. The welding positioning tool for steel structure bridge components according to claim 1 is characterized in that: The telescopic structure includes a square tube, both ends of which are slidably inserted with extension rods, a bidirectional screw is installed inside the square tube, both ends of the bidirectional screw are respectively inserted into the extension rods located at both ends and are threadedly connected to the extension rods, and an adjusting wheel protruding from the outside of the square tube is provided in the middle of the square tube, and the adjusting wheel is connected to the bidirectional screw.

7. The welding positioning tool for steel structure bridge components according to claim 6 is characterized in that: The extension rod is respectively connected to the axial locking buckle and the clamping structure, and the clamping structure includes a ball sleeve connected to the extension rod, a rotating ball is rotatably installed inside the ball sleeve, a brake plate that fits the rotating ball is slidably installed inside the ball sleeve, a locking screw that passes through the ball sleeve is rotatably installed on the brake plate, and the locking screw is threadedly connected to the ball sleeve.

8. The welding positioning tool for steel structure bridge components according to claim 7 is characterized in that: The rotating ball is connected to a fixed clamping plate, a movable clamping plate is arranged on the fixed clamping plate, a clamping screw is rotatably mounted on the movable clamping plate, and the clamping screw passes through the movable clamping plate and is threadedly connected with the fixed clamping plate.

9. The welding positioning tool for steel structure bridge components according to claim 1 is characterized in that: A positioning screw is threadedly connected to one side of the welding platform, and the positioning screw passes through the welding platform and abuts against the surface of the base.

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