Pier framework welding equipment for steel bridge building construction

Abstract

The invention relates to the technical field of bridge pier framework welding, and provides bridge pier framework welding equipment for steel bridge building construction.The bridge pier framework welding equipment comprises a lifting module, an inner clamp assembly, a rotating frame, a rib clamp assembly and a supporting table, the inner clamp assembly comprises a coaming clamp and a flange clamp, and a driving part in the coaming clamp is used for controlling a center shaft to rotate; the hydraulic telescopic part is connected between the center shaft and the base plate, the adsorption part is fixedly arranged on the surface of the base plate, a longitudinal rod in the flange clamp makes sliding contact with the base plate, a first spring is connected between the base plate and the longitudinal rod, and the ends, close to the supporting table, of the center shaft and the longitudinal rod are provided with a key strip and a clamping block correspondingly. The key bars can make sliding contact with the key grooves, the feeding station and the welding station are arranged on the two sides of the rib clamp assembly correspondingly, precise and efficient welding and batch production of all parts of the bridge pier framework are achieved, and the integrity and safety of the bridge pier framework in the subsequent splicing process are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of bridge pier frame welding technology, specifically to a bridge pier frame welding equipment for steel bridge construction. Background Technology

[0002] The steel pier frame is a key load-bearing structure in bridge construction, primarily used to support the bridge deck load and transfer it to the foundation. (See attached image) Figure 1 As shown, its typical structure is assembled by welding together components such as flanges, sidewalls, longitudinal reinforcement (including longitudinal reinforcement I in I-beam structures and longitudinal reinforcement II in flat plates), and curved reinforcement. These components are usually made of high-strength steel (such as Q345B or ASTM A572) to ensure sufficient strength and durability. In bridge engineering, the steel pier frame must withstand complex dynamic loads, including vehicle loads, wind loads, seismic forces, and temperature stresses. Therefore, its welding quality and assembly precision are directly related to the overall safety and service life of the bridge.

[0003] Flanges, as end connectors of the framework, are typically ring-shaped or plate-shaped structures with bolt holes on their surface for connection to other pier sections or foundations. The girders are the cylindrical main body of the bridge pier frame, welded together from multiple curved steel plates. The splicing of the girders must ensure roundness and verticality; otherwise, the overall stability of the frame will be affected. Longitudinal ribs are reinforcing ribs welded to the outer surface of the girders to improve the frame's bending and compressive strength. Longitudinal rib I is typically narrower, while longitudinal rib II is wider, and they must be evenly distributed according to design specifications. For example, longitudinal rib II must be positioned between flange bolt holes to avoid interference with the bolts and ensure uniform stress distribution. Arc-shaped ribs are welded between longitudinal ribs to further reinforce the skeleton and prevent local buckling. The positions of the arc-shaped ribs are usually divided into two types: high and low. They need to be arranged alternately with the longitudinal ribs to form a grid-like reinforced structure. During assembly, flange bolt holes are often used as positioning references to ensure the accurate position of all components. In the existing technology, the welding of steel pier frames mainly relies on manual or semi-automatic equipment, which has the following problems: (1) The alignment of flange bolt holes and longitudinal ribs relies on manual measurement and adjustment, which is inefficient and easily affected by the operator's experience, resulting in component misalignment and the frame not meeting the design specifications after welding; (2) The welding process requires multiple manual adjustments to the workpiece position (such as rotating flanges or moving ribs), which is inefficient, labor-intensive, and prone to human error. Due to inaccurate positioning, the weld quality is unstable, especially for complex welds such as the circumferential joint between the circumferential plate and the flange, and the vertical joint between the longitudinal rib and the circumferential plate, where manual welding is difficult to guarantee uniformity. Summary of the Invention

[0004] The purpose of this invention is to provide a welding equipment for the pier frame of steel bridge construction, which aims to solve the problems of low positioning accuracy and low efficiency of existing welding equipment.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a steel bridge pier frame welding device for construction, comprising a lifting module and a support platform, and further comprising: An inner clamp assembly connected to a lifting module, the inner clamp assembly including a perimeter clamp and a flange clamp, the perimeter clamp including a drive component, a central shaft, a hydraulic telescopic component, a key bar, a base plate and an adsorption component, the drive component and the central shaft are both connected to the lifting module, the drive component is used to control the rotation of the central shaft, the hydraulic telescopic component is connected between the central shaft and the base plate, and the adsorption component is fixedly disposed on the surface of the base plate; The flange clamp includes a longitudinal rod, a clamping block, and a spring. The longitudinal rod slides in contact with the base plate, and the spring connects the base plate and the longitudinal rod. The central shaft and the end of the longitudinal rod near the support table are respectively provided with a key bar and a clamping block. A rotating frame is connected to the surface of a support platform. A central tube is fixedly connected to the rotating frame. A keyway is provided on the inner wall of the central tube. The key bar can slide in contact with the keyway. The clamping block can contact the surface of the rotating frame. The reinforcing bar clamp assembly is mounted on the rotating frame; The rib clamp assembly has a feeding station on the side away from the support platform, and a welding station is provided at a 90-degree angle between the rib clamp assembly and the center of the rotating frame.

[0006] The beneficial effects of the present invention are: (1) Based on the stress characteristics and structural requirements of the pier frame, the reinforcement clamp assembly can not only use the horizontal movement control movable pin to position the flange bolt hole, but also simultaneously satisfy the fixing of longitudinal reinforcement I, longitudinal reinforcement II and arc reinforcement under the condition of controlling the universal clamp to move the same distance, thus realizing the precise and efficient welding of each component of the pier frame and ensuring the integrity and safety of the pier frame in subsequent splicing. (2) The design of the internal clamp assembly and lifting module in this application can not only accurately and efficiently complete the pre-positioning of the flange, but also realize the automated assembly and welding of several surrounding plates, longitudinal ribs I, longitudinal ribs II and arc ribs, and can also realize the automated unloading after welding, realizing high-precision, high-efficiency and high-consistency automated welding, which is suitable for mass production of large bridge pier skeleton construction. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of a steel bridge pier frame in the prior art.

[0008] Figure 2 This is an overall schematic diagram of the steel bridge pier frame used in this invention.

[0009] Figure 3 This is an exploded view of the present invention.

[0010] Figure 4 This is a schematic diagram showing the disassembled internal clamp assembly of the present invention.

[0011] Figure 5 This is a perspective view of the internal clamp assembly of the present invention.

[0012] Figure 6 This is a perspective view of the rotating frame of the present invention.

[0013] Figure 7 This is a perspective view of the reinforcing bar clamp assembly of the present invention.

[0014] Figure 8 This is a schematic diagram illustrating the flange installation and positioning according to the present invention.

[0015] Figure 9 For the present invention Figure 8 A magnified view of a portion of point a.

[0016] Figure 10 This is a schematic diagram of the installation of the enclosure panel according to the present invention.

[0017] Figure 11 This is a top view of the installation of the longitudinal plate I according to the present invention.

[0018] Figure 12 This is a top view of the installation of the longitudinal plate Ii according to the present invention.

[0019] Figure 13 This is a schematic diagram of the installation of the arc-shaped rib according to the present invention.

[0020] Figure 14 This is a schematic diagram of the material cutting process for the bridge pier frame according to the present invention.

[0021] Reference numerals: 1-Frame, 11-Transverse guide rail; 2-Inner clamp assembly, 21-Wall clamp, 211-Drive component, 212-Central shaft, 213-Hydraulic telescopic component, 214-Base plate, 215-Adsorption component, 216-Pipe connector, 217-Fixing pin, 218-Key strip, 219-Pressure plate, 22-Flange clamp, 221-Longitudinal rod, 222-Clamping block, 223-Limiting hole, 224-Spring 1; 3-Lifting module; 4-Rotating frame, 41-Central tube, 411-Keyway, 42-Positioning pin, 421-Spring 2; 5-Fir clamp assembly, 51-General clamp, 511-Main frame, 512-Clamping plate, 5121-C-shaped opening, 513-L-shaped chuck, 514-Boss, 52-Longitudinal cylinder, 53-Horizontal cylinder, 54-Moving frame, 55-Z-shaped block; 6-Support platform. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0024] Please see Figures 1 to 13 In one embodiment of the present invention, a steel bridge pier frame welding device for construction includes a lifting module 3 and a support platform 6, and further includes: The inner clamp assembly 2 is connected to the lifting module 3. The inner clamp assembly 2 includes a surrounding plate clamp 21 and a flange clamp 22. The surrounding plate clamp 21 includes a driving component 211, a central shaft 212, a hydraulic telescopic component 213, a key bar 218, a base plate 214, and an adsorption component 215. The driving component 211 and the central shaft 212 are both connected to the lifting module 3. The driving component 211 is used to control the rotation of the central shaft 212. The hydraulic telescopic component 213 is connected between the central shaft 212 and the base plate 214. The adsorption component 215 is fixedly disposed on the surface of the base plate 214. A pressure plate 219 is fixedly connected to the surface of the central shaft 212. The pressure plate 219 can contact the flange surface above the surrounding plate. The flange clamp 22 includes a longitudinal rod 221, a clamping block 222, and a spring 224. The longitudinal rod 221 is in sliding contact with the base plate 214, and the spring 224 is connected between the base plate 214 and the longitudinal rod 221. The central shaft 212 and the end of the longitudinal rod 221 near the support platform 6 are respectively provided with a key strip 218 and a clamping block 222. The surface of the base plate 214 is provided with a fixing pin 217, and the surface of the longitudinal rod 221 is provided with a limiting hole 223. The fixing pin 217 is in sliding contact with the limiting hole 223. A rotating frame 4 is connected to the surface of the support platform 6. A central tube 41 is fixedly connected to the rotating frame 4. A keyway 411 is provided on the inner wall of the central tube 41. The key bar 218 can slide in contact with the keyway 411. The clamping block 222 can contact the surface of the rotating frame 4. The reinforcing bar clamp assembly 5 is mounted on the rotating frame 4; The reinforcing bar clamp assembly 5 is provided with a feeding station on the side away from the support platform 6, and a welding station is provided in the direction where the reinforcing bar clamp assembly 5 and the center of the rotating frame 4 are at a 90-degree angle.

[0025] In this embodiment of the invention, a pipe joint 216 is provided at one end and on the surface of the central shaft 212. The pipe joint 216 at the end of the central shaft 212 is used to connect to a vacuum pump. The adsorption component 215 is a vacuum adsorption nozzle. The vacuum adsorption nozzle is connected to the pipe joint 216 on the surface of the central shaft 212. The lifting module 3 in this invention controls the height of the inner clamp assembly 2. When the key bar 218 engages or disengages from the keyway 411, the workpiece rotation can be controlled independently. For example, the drive component 211 controls the inner clamp assembly 2 to rotate at a specific angle (such as 60°, 90°, 180°). Combined with the lifting of the lifting module 3, the assembly of the enclosure plate, the welding of the reinforcing bars, and the coverage of multi-angle welds are realized. When the keyway 411 in the central tube 41 engages with the key bar 218, the inner clamp assembly 2 and the rotating frame 4 can rotate synchronously. The welding position is fixed. By rotating the workpiece, welds at different positions can be exposed, thereby realizing continuous welding. This solves the problems of poor welding consistency and low efficiency, avoids manual adjustment of the workpiece position, ensures uniform weld quality, and significantly improves the welding speed. In this invention, the enclosure clamp 21 uses a drive component 211 to control the rotation of the central shaft 212, and combines the hydraulic telescopic component 213 to drive the base plate 214 to move radially, so that the adsorption component 215 (vacuum adsorption nozzle) can adsorb and fix the enclosure. The adsorption component 215 not only provides adsorption force, but also plays a radial positioning role, ensuring the accurate relative position of the enclosure and the flange. In this invention, the flange clamp 22 achieves clamping of the flange inner hole through the combination of longitudinal rod 221, clamping block 222 and spring 224. The key bar 218 at the end of the central shaft 212 cooperates with the keyway 411 at the center of the rotating frame 4 to lock the inner clamp assembly 2 and the rotating frame 4, which facilitates synchronous rotation welding.

[0026] The inner clamp assembly 2 in this invention has flange clamping, plate adsorption and rotation functions, and completes the pre-positioning of multiple components of the pier frame in the entire welding process, avoiding the errors caused by multiple clamping in traditional welding.

[0027] Please see Figures 7 to 13 In another embodiment of the present invention, the reinforcing bar clamp assembly 5 includes a general-purpose clamp 51, a longitudinal cylinder 52, a Z-shaped block 55, a horizontal cylinder 53, and a movable frame 54. The fixed end of the longitudinal cylinder 52 is fixedly connected to the rotating frame 4, the movable frame 54 is fixedly connected to the movable end of the longitudinal cylinder 52, the fixed end of the longitudinal cylinder 52 is fixedly connected to the movable frame 54, the general-purpose clamp 51 is fixedly connected to the movable end of the longitudinal cylinder 52, and the Z-shaped block 55 is fixedly connected to the movable frame 54.

[0028] Please see Figures 7 to 13 Furthermore, the universal clamp 51 includes a mother frame 511, clamping plates 512, L-shaped chucks 513, and bosses 514. The clamping plates 512 are all elastically disposed within the mother frame 511. The longitudinal cylinder 52 is fixedly connected to the mother frame 511. The surface of the clamping plate 512 is provided with an inverted opening, and the end of the inverted opening is provided with an L-shaped chuck 513. The surface of the mother frame 511 is provided with bosses 514. The two sets of clamping plates 512 are symmetrically distributed about the bosses 514.

[0029] In this embodiment of the invention, the universal fixture 51 adopts a symmetrical design of a mother frame 511, a clamping plate 512, an L-shaped chuck 513, and a boss 514. The clamping plate 512 is elastically set inside the mother frame 511. Under the premise of controlling the movement of the moving frame 54 by the horizontal cylinder 53 to move a fixed stroke, the L-shaped chuck 513 can fix the longitudinal rib I, the clamping plate 512 and the boss 514 can fix the longitudinal rib II, and the U-shaped opening 5121 can fix the arc rib. The longitudinal cylinder 52 can adjust the height of the universal fixture 51 to adapt to the arc ribs in different positions, realizing the rapid switching and fixing of various rib materials and ensuring accurate welding position.

[0030] Please see Figures 8 to 9 In another embodiment of the present invention, a positioning hole is provided on the surface of the rotating frame 4 at the position corresponding to the Z-shaped block 55, and a positioning pin 42 is provided in the positioning hole. The positioning pin 42 can pass through the bolt hole on the flange surface and is distributed in the middle position of the surrounding plate. A spring 421 is connected between the positioning pin 42 and the rotating frame 4, and the Z-shaped block 55 can slide in contact with the end of the positioning pin 42.

[0031] In this embodiment of the invention, the Z-shaped block 55 cooperates with the positioning pin 42 on the rotating frame 4. The movement of the horizontal cylinder 53 controls the raising and lowering of the positioning pin 42. Initially, the Z-shaped block 55 drives the positioning pin 42 to protrude and position the flange bolt hole. During subsequent movement, the positioning pin 42 is reset to release the positioning and avoid interfering with the welding.

[0032] Please see Figure 14 In another embodiment of the present invention, a frame 1 is further included, the top of which is provided with a transverse guide rail 11, and the lifting module 3 is slidably disposed within the transverse guide rail 11.

[0033] In this embodiment of the invention, the lifting module 3 is combined with the transverse guide to achieve horizontal movement of the workpiece during unloading.

[0034] The welding steps for the bridge pier frame include: S100. In the initial state, the horizontal cylinder 53 controls the reinforcing bar clamp assembly 5 to be located away from the rotating frame 4. At this time, the Z-shaped block 55 (the step where the Z-shaped block 55 is closer to the positioning pin 42) can overcome the elastic force of the spring 421 to drive the positioning pin 42 to protrude from the surface of the rotating frame 4. (Refer to the attached diagram.) Figure 8-9 The loading station (robotic arm) places the flange above the rotating frame 4. The lifting module 3 controls the height of the inner clamp assembly 2 to adjust the clamping block 222 into the flange. The hydraulic telescopic component 213 controls several base plates 214 and longitudinal rods 221 to move radially to drive the clamping block 222 to clamp the flange. The driving component 211 controls the rotation of the central shaft 212 to align the bolt holes on the flange surface with the positioning pin 42. The lifting module 3 controls the flange to be placed flat on the surface of the rotating frame 4. The positioning pin 42 positions the bolt holes on the flange surface, which facilitates the subsequent precise installation and welding of the surrounding plate, longitudinal rib I, and longitudinal rib II. After that, the horizontal cylinder 53 controls the rib clamp assembly 5 to move a preset distance toward the central tube 41. At this time, the elastic force of the spring 421 drives the positioning pin 42 to move to the Z-shaped block 55 step at a distance. During the subsequent loading and resetting stroke of the horizontal cylinder 53, the positioning pin 42 remains stationary in the positioning hole to release the positioning of the flange. S200, Reference Appendix Figure 10 Under the premise of keeping the posture of the inner clamp assembly 2 unchanged (key bar 218 is not in the keyway 411, clamp block 222 is just in contact with the surface of the rotating frame 4, and two sets of adsorption components 215 are symmetrically distributed on both sides of the positioning pin 42), it should be noted that the distance between clamp block 222 and central shaft 212 is less than the distance between adsorption component 215 and central shaft 212. When adsorption component 215 is in contact with the surrounding plate, there is a certain distance between clamp block 222 and the inner side of the flange. The loading station places the surrounding plate on the flange surface. On the one hand, adsorption component 215 can play the role of radial positioning of the surrounding plate. On the other hand, adsorption component 215 (vacuum adsorption nozzle) can also adsorb and fix the surrounding plate. S300: Use the drive component 211 to control the inner clamp assembly 2 to rotate 60 degrees, so as to adjust another set of adsorption components 215 to the loading station. Repeat the action of step S200, and repeat until all 6 sets of adsorption components 215 are adsorbed and fixed with the enclosure. S400, Reference Appendix Figure 11 Using the horizontal cylinder 53, the moving frame 54 and Z-shaped block 55 are moved a preset distance toward the central axis 212. The downward elastic force of the spring 421 drives the positioning pin 42 to disengage from the bolt hole on the flange surface. Under the premise of controlling the inner clamp assembly 2 to rotate 60 degrees with the drive component 211 at a certain frequency, the welding equipment at the welding station welds the splice between the enclosure and the enclosure and the flange. At this time, the vacuum pump is controlled to stop evacuating the pipe joint 216 and release the adsorption force of the adsorption component 215 on the enclosure. S500, Reference Appendix Figure 11 After the flange rotates one full turn to complete the welding (the bolt holes on the flange surface are still aligned with the positioning pin 42), the loading station places the longitudinal rib I at the position of the positioning pin 42. The horizontal cylinder 53 controls the rib clamp assembly 5 to move towards the longitudinal rib I at a preset distance. The L-shaped chuck 513 in the rib clamp can fix the longitudinal rib I to the side plate and the flange surface. The lifting module 3 controls the inner clamp assembly 2 to descend a certain distance, so that the key strip 218 is inserted into the keyway 411. The clamp block 222 is subjected to an upward force from the rotating frame 4, so that the longitudinal rod 221 moves upward relative to the base plate 214. The spring 224 is in a compressed state. The drive unit 211 controls the inner clamp assembly 2, the rotating frame 4 and the rib clamp assembly 5 to rotate 90 degrees clockwise / counterclockwise. The welding equipment at the welding station is used to weld the longitudinal rib I. S600 After welding is completed, the inner clamp assembly 2, rotating frame 4 and rib clamp assembly 5 are controlled to rotate clockwise and reset using the drive component 211. The key bar 218 in the inner clamp assembly 2 is controlled to disengage upward from the keyway 411 using the lifting module 3. The rib clamp assembly 5 is reset using the horizontal cylinder 53. The inner clamp assembly 2, the surrounding plate and the flange are rotated 90 degrees using the drive component 211. The action of step S500 is repeated to feed and weld another set of longitudinal ribs I. This cycle is repeated until the welding of four sets of longitudinal ribs I is completed. S700, Reference Appendix Figure 12 After the last set of longitudinal ribs I is welded, the drive unit 211 controls the inner clamp assembly 2, longitudinal rib I, the surrounding plate and the flange to rotate 45 degrees. The loading station places the longitudinal rib II between the two sets of bolt holes (based on the comprehensive consideration that the width of the longitudinal rib II is greater than that of the longitudinal rib I and that the longitudinal ribs are evenly distributed and evenly stressed, the longitudinal rib II must be placed between the two sets of bolt holes). The horizontal cylinder 53 controls the clamping plate 512 and the boss 514 in the rib clamp assembly 5 to fix the longitudinal rib II. Repeat the actions of steps S600 and S700 to weld the longitudinal rib II. It should be noted that when welding another set of longitudinal ribs II, the drive unit 211 controls the inner clamp assembly 2, the surrounding plate and the flange to rotate 180 degrees. S800, Reference Appendix Figure 13After both sets of longitudinal ribs II are welded, the loading station places the lower-positioned arc rib between the two sets of longitudinal ribs I and II. The horizontal cylinder 53 controls the U-shaped opening 5121 in the rib clamp assembly 5 to fix the arc rib from the middle position. The structural design of the universal clamp 51 allows the horizontal cylinder 53 to simultaneously fix the longitudinal ribs I, II and arc ribs while controlling the universal clamp 51 to move the same distance. Repeat step S700. The welding equipment at the welding station welds the joints between the longitudinal ribs I, II and arc ribs in sequence. After the loading station places the higher-positioned arc rib between the two sets of longitudinal ribs I and II, the height of the universal clamp 51 is adjusted using the longitudinal cylinder 52. Repeat the above steps to complete the welding of the arc rib at this position. S900, at the loading station, place the flange above the enclosure plate and repeat step S100. By using the drive component 211 to control the rotation of the central shaft 212, the bolt holes on the flange surface can be aligned with a certain longitudinal rib I. This ensures that the longitudinal ribs I and longitudinal ribs II of several sets of pier frames can be on the same straight line during the subsequent splicing of the pier frame, thereby meeting the stress standard requirements. During welding, the lifting module controls the pressure plate to press down on the flange to keep it fixed. After welding is completed, the pier frame is fixed by adsorption using the inner clamp assembly 2, and the lifting module 3 is controlled to move horizontally along the transverse guide rail 11 to realize the automatic unloading of the pier frame.

[0035] In summary, based on the stress characteristics and structural requirements of the pier frame, this application enables the reinforcement clamp assembly 5 to not only position the flange bolt holes by using the horizontal movement control movable pin, but also to simultaneously fix the longitudinal reinforcement I, longitudinal reinforcement II and arc reinforcement while controlling the universal clamp 51 to move the same distance. This achieves precise and efficient welding of various components of the pier frame, ensuring the integrity and safety of the pier frame in subsequent splicing. The design of the inner clamp assembly 2 and the lifting module 3 in this application can not only accurately and efficiently complete the pre-positioning of the flange, but also realize the automated assembly and welding of several surrounding plates, longitudinal ribs I, longitudinal ribs II and arc ribs, and can also realize the automated unloading after welding. It realizes high-precision, high-efficiency and high-consistency automated welding, which is suitable for mass production of large bridge pier skeleton construction.

[0036] While several embodiments and examples of the present invention have been described for those skilled in the art, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A steel bridge construction pier skeleton welding apparatus comprising a lifting module (3) and a support table (6), characterized in that, Also include: The inner clamp assembly (2) connected with the lifting module (3) includes a fence clamp (21) and a flange clamp (22), the fence clamp (21) includes a driving part (211), a center shaft (212), a hydraulic telescopic part (213), a key bar (218), a base plate (214) and a suction accessory (215), the driving part (211) and the center shaft (212) are connected with the lifting module (3), the driving part (211) is used for controlling the rotation of the center shaft (212), the hydraulic telescopic part (213) is connected between the center shaft (212) and the base plate (214), and the suction accessory (215) is fixedly arranged on the surface of the base plate (214); The flange clamp (22) includes a longitudinal rod (221), a clamp block (222) and a spring (224), the longitudinal rod (221) is in sliding contact with the base plate (214), the spring (224) is connected between the base plate (214) and the longitudinal rod (221), and the center shaft (212) and the longitudinal rod (221) are respectively provided with the key bar (218) and the clamp block (222) at one end close to the support table (6); The rotating frame (4) is arranged on the surface of the support table (6), the rotating frame (4) is fixedly connected with the center pipe (41), the inner wall of the center pipe (41) is provided with a key groove (411), the key bar (218) can be in sliding contact with the key groove (411), and the clamp block (222) can be in contact with the surface of the rotating frame (4); The reinforcing bar clamp assembly (5) is arranged on the rotating frame (4); The reinforcing bar clamp assembly (5) is provided with a welding station in a direction of 90 degrees between the reinforcing bar clamp assembly (5) and the center of the rotating frame (4).

2. The bridge pier skeleton welding apparatus for a steel bridge construction according to claim 1, characterized by The reinforcing bar clamp assembly (5) includes a universal clamp (51), a longitudinal cylinder (52), a Z-shaped block (55), a horizontal cylinder (53) and a moving frame (54), the fixed end of the longitudinal cylinder (52) is fixedly connected with the rotating frame (4), the moving frame (54) is fixedly connected with the movable end of the longitudinal cylinder (52), the fixed end of the longitudinal cylinder (52) is fixedly connected with the moving frame (54), the universal clamp (51) is fixedly connected with the movable end of the longitudinal cylinder (52), and the Z-shaped block (55) is fixedly connected with the moving frame (54).

3. The steel bridge construction pier skeleton welding apparatus according to claim 2, characterized by The universal clamp (51) includes a female frame (511), a clamping plate (512), an L-shaped chuck (513) and a boss (514), the clamping plates (512) are elastically arranged in the female frame (511), the longitudinal cylinder (52) is fixedly connected with the female frame (511), the surface of the clamping plate (512) is provided with a H-shaped opening, the H-shaped opening is provided with the L-shaped chuck (513) at the end, the surface of the female frame (511) is provided with the boss (514), and the two groups of clamping plates (512) are symmetrically distributed about the boss (514).

4. The steel bridge construction pier skeleton welding apparatus according to claim 3, characterized by The rotating frame (4) surface is provided with a positioning hole corresponding to the Z-shaped block (55), the positioning hole is provided with a positioning pin (42), the positioning pin (42) can penetrate the bolt hole of the flange surface, and is distributed at the middle position of the coaming, the positioning pin (42) is connected with the rotating frame (4) through a spring (421), and the Z-shaped block (55) can slide with the end of the positioning pin (42).

5. The steel bridge construction pier skeleton welding apparatus according to claim 1, characterized by The surface of the base plate (214) is provided with a fixing pin (217), the surface of the longitudinal rod (221) is provided with a limiting hole (223), and the fixing pin (217) is in sliding contact with the limiting hole (223).

6. The steel bridge construction pier skeleton welding apparatus according to claim 1, characterized by The surface of the center shaft (212) is fixedly connected with a pressing plate (219), and the pressing plate (219) can contact the flange surface above the coaming.

7. The steel bridge construction pier skeleton welding apparatus according to claim 1, characterized by One end and the surface of the center shaft (212) are provided with a pipe joint (216), the pipe joint (216) at the end of the center shaft (212) is used for connecting a vacuum pump, the suction accessory (215) is a vacuum suction rubber nozzle, and the vacuum suction rubber nozzle is connected with the pipe joint (216) on the surface of the center shaft (212).

8. The steel bridge construction pier skeleton welding apparatus according to claim 1, characterized by Further comprising a rack (1), the top of the rack (1) is provided with a transverse guide rail (11), and the lifting module (3) is slidably arranged in the transverse guide rail (11).

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