Bridge pile foundation reinforcement cage welding device and construction method thereof

Abstract

The application provides a bridge pile foundation reinforcement cage welding device and a construction method thereof, which comprises a positioning frame and a welding device, wherein the welding device comprises a welding mechanism, a driving mechanism and a height adjusting mechanism; the driving mechanism is arranged in the positioning frame through the height adjusting mechanism; the driving mechanism comprises a mounting ring, an annular slide rail slider module, a moving frame, an external gear ring and a second motor; the mounting ring is fixedly installed on the height adjusting mechanism; the annular slide rail slider module is fixedly installed on the upper side of the mounting ring; the moving frame is fixedly installed on the slider of the annular slide rail slider module; the second motor is fixedly installed on the moving frame; the external gear ring is fixedly installed on the outer periphery of the mounting ring; and the second motor is engaged with the external gear ring through a gear. When the application is used, the labor amount of workers can be reduced, the welding quality is improved, the welding quality is more stable, and the stability of the connection between the reinforcement cages is ensured.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, and in particular relates to a welding device for steel cages of bridge pile foundations and its construction method. Background Technology

[0002] The common procedure for sectional hoisting of reinforcing cages after pile hole construction is as follows: First, the reinforcing cage is transported to the designated location using trailers, trolleys, or other equipment. Then, a truck crane lifts each section of the reinforcing cage directly above the pile hole. On-site construction personnel work together to visually inspect and correct the centering and verticality using simple auxiliary marks. The cage is then lowered into the pile hole and temporarily secured with steel pipes. The next section of the reinforcing cage is then hoisted, aligned, and welded. This process is repeated until the designed length of the reinforcing cage is reached, at which point it is secured using welding, wire binding, or other methods.

[0003] The welding process is mostly done manually, which requires highly skilled workers. Different workers produce different welding quality, making quality control inconvenient and labor-intensive. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a welding device and construction method for bridge pile foundation steel cages, which solves the technical problems of high labor intensity and inconvenient quality control in the welding process in the prior art.

[0005] To achieve the above and other related objectives, the present invention provides a welding device and construction method for a bridge pile foundation reinforcement cage, comprising a steel casing and a reinforcement cage, wherein the steel casing is vertically installed in a drilled hole, and the reinforcement cage is hoisted into the steel casing by a crane, characterized in that it comprises:

[0006] A positioning frame, which is mounted on the outside of the steel casing;

[0007] A welding device is provided inside the positioning frame and located above the steel casing. The welding device includes a welding mechanism, a driving mechanism, and a height adjustment mechanism.

[0008] The welding mechanism is mounted on the driving mechanism, and the driving mechanism drives the welding mechanism to move around the outer periphery of the steel cage.

[0009] The drive mechanism is located within the positioning frame via the height adjustment mechanism, above the steel casing. The drive mechanism includes a mounting ring, an annular slide rail slider module, a moving frame, an external gear ring, and a second motor. The mounting ring is fixedly mounted on the height adjustment mechanism, the annular slide rail slider module is fixedly mounted on the upper side of the mounting ring, the moving frame is fixedly mounted on the slider of the annular slide rail slider module, the second motor is fixedly mounted on the moving frame, and the external gear ring is fixedly mounted on the outer circumference of the mounting ring. The second motor meshes with the external gear ring via gears.

[0010] In this way, the drive mechanism can drive the welding mechanism to make a circular motion around the outside of the steel cage, thereby welding the joints of the steel cage to ensure that the steel cage meets the required length. When the drive mechanism is started, the second motor can drive the slider on the annular slide rail module to move on the annular slide rail through meshing gears and external gear rings, thereby moving the moving frame mounted on the slider.

[0011] Optionally, the welding mechanism includes a first moving plate, a second moving plate, a rack, a welding frame, a third motor, and a fourth motor;

[0012] The first movable plate is horizontally slidably mounted above the movable frame via a linear slide rail slider module. The first movable plate has a through mounting hole. The rack moves vertically within the mounting hole via the linear slide rail slider module. The lower end of the rack is fixedly connected to the second movable plate. The second movable plate is located below the first movable plate and is arranged parallel to the first movable plate.

[0013] Optionally, the third motor is fixedly mounted on the first movable plate, and the output end of the third motor meshes with the rack through a gear. The fourth motor is fixedly mounted on the movable frame, and the output end of the fourth motor is coaxially fixedly mounted with a drive roller and is arranged vertically downward. The second movable plate and the drive roller have teeth that mesh with each other.

[0014] The welding frame is fixedly mounted on the second movable plate.

[0015] By using the rack and pinion and the third motor, the second moving plate can move vertically. By using the fourth motor to drive the drive roller to rotate, the second moving plate can move horizontally. Since the first and second moving plates are connected by the rack and pinion and the linear slide rail slider module, when the second moving plate moves, it can drive the first moving plate to move horizontally.

[0016] Optionally, the welding frame includes a welding torch, a torch holder, a fifth motor, and a frame. The frame is fixedly mounted on the second movable plate, and the fifth motor is fixedly mounted on the frame. The output end of the fifth motor faces downward and is connected to the torch holder via a connecting shaft. The angle of the torch holder is adjusted by the fifth motor, and the welding torch is fixedly mounted inside the torch holder. The fifth motor allows for adjustment of the angle of the torch holder, enabling the welding torch connector on the torch holder to better align with the welding points on the reinforcing cage, thus improving welding efficiency.

[0017] Optionally, the height adjustment mechanism includes a support frame and an electric push rod. One end of the support frame is fixedly installed below the mounting ring, and the other end is movably connected to the positioning frame. The fixed end of the electric push rod is fixedly installed on the positioning frame, and the moving end is fixedly connected to the support frame. Using the electric push rod, the height of the support frame can be adjusted, thereby allowing the welding torch to be positioned better to meet welding requirements.

[0018] Optionally, the positioning frame includes an upper positioning frame and a lower positioning frame, which are connected by several connecting columns. The upper positioning frame, the lower positioning frame, and the connecting columns form a three-dimensional frame structure, and have a placement cavity in the middle that facilitates the hoisting of the reinforcing cage into the steel casing.

[0019] Optionally, the drive roller is rotatably mounted on the movable frame. The rotatable drive roller facilitates the horizontal movement of the second movable plate.

[0020] Optionally, the frame includes a testing platform, on which an industrial camera is mounted. The industrial camera allows for data acquisition of the welding torch position and welding quality, making the device more automated.

[0021] A construction method using a bridge pile foundation steel cage welding device, characterized in that:

[0022] Includes the following steps:

[0023] S1: After the positions of the first and second steel cage sections are fixed, start the welding device;

[0024] S2: Using an industrial camera, the position of the welding head of the welding torch relative to the point to be welded is detected. Based on the detected data, the position of the welding head is adjusted using a height adjustment mechanism, a second motor, a third motor, a fourth motor, and a fifth motor, so that the welding head contacts the position of the reinforcing cage to be welded.

[0025] S3: Start the welding torch and begin the welding process. Then, using the third motor, the welding torch moves up or down during the welding process to perform linear welding on the points to be welded.

[0026] S4: After welding one welding point, use the second motor to drive the moving frame to rotate around the outside of the steel cage so that the welding torch can reach the second welding point;

[0027] S5: Repeat steps S2 to S4 until all welding points are completed;

[0028] S6: The welding torch is returned to its initial position using the height adjustment mechanism, the second motor, the third motor, the fourth motor, and the fifth motor.

[0029] The beneficial effects of this invention are as follows:

[0030] Using this invention can reduce the workload of workers, improve the quality of welding, make the welding quality more stable, and ensure the stability of the connection between steel cages. Attached Figure Description

[0031] Figure 1 The diagram shown is a schematic representation of the overall structure of the present invention.

[0032] Figure 2 Displayed as Figure 1 Enlarged diagram of point B in the middle.

[0033] Figure 3 The diagram shows the structure of the present invention after the positioning component has been added.

[0034] Figure 4 Displayed as Figure 3 A schematic diagram of the structure after removing some components.

[0035] Figure 5 Displayed as Figure 4 A schematic diagram of the structure after removing some components.

[0036] Figure 6 Displayed as Figure 5 Enlarged diagram of point A in the middle.

[0037] Figure 7 The diagram shows the installation structure of the drive ring. Detailed Implementation

[0038] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0039] Please see Figures 1 to 7It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0040] like Figures 1-6 As shown, a bridge pile foundation steel cage welding device includes: a positioning frame 1 and a welding device 3, wherein the welding device 3 is mounted on the positioning frame 1.

[0041] In this embodiment, the positioning frame 1 is erected outside the drilled hole where the steel casing 4 has been installed by a crane, so that the steel casing 4 is inside the positioning frame 1. The positioning frame 1 includes a lower positioning frame 11 and an upper positioning frame 12. The lower positioning frame 11 and the upper positioning frame 12 are connected by four vertical connecting columns 13, so that the positioning frame 1 forms a three-dimensional frame structure, and has a through placement cavity in the middle that facilitates the hoisting of the steel cage 5 into the steel casing 4.

[0042] In this embodiment, the welding device 3 includes a welding mechanism 31, a driving mechanism 32, and a height adjustment mechanism 33. The welding mechanism 31 is mounted on the driving mechanism 32. The driving mechanism 32 drives the welding mechanism 31 to move circumferentially outside the welding position of the reinforcing cage 5. The driving mechanism 32 is set in the positioning frame 1 through the height adjustment mechanism 33. The height of the welding mechanism 31 can be adjusted through the height adjustment mechanism 33 so that the position of the welding torch 34 meets the welding requirements.

[0043] Specifically, the drive mechanism 32 includes a mounting ring 321, an annular slide rail slider module 322, a moving frame 323, an external gear ring 324, and a second motor 325. The mounting ring 321 is fixedly mounted on the height adjustment mechanism 33, the annular slide rail slider module 322 is fixedly mounted on the mounting ring 321, the moving frame 323 is fixedly mounted on the slider of the annular slide rail slider module 322, the second motor 325 is fixedly mounted on the moving frame 323, and the external gear ring 324 is fixedly mounted on the outer periphery of the mounting ring 321. The output end of the second motor 325 meshes with the external gear ring 324. Through the second motor 325, the moving frame 323 can move on the annular slide rail slider module 322 under the action of the gear 327 and the external gear ring 324.

[0044] In this embodiment, the welding mechanism 31 is mounted on the movable frame 323. The welding mechanism 31 includes a first movable plate 311, a second movable plate 312, a rack 313, a welding frame 314, a third motor 315, and a fourth motor 316. The first movable plate 311 is horizontally slidably mounted above the movable frame 323 via a linear slide rail mechanism 317. The first movable plate 311 has a through mounting hole 318. The rack 313 is vertically mounted in the mounting hole 318 via a linear slide rail slider module 319. The lower end of the rack 313 is fixedly connected to the second movable plate 312. The second movable plate 312 is located below the first movable plate 311 and is parallel to the first movable plate 311.

[0045] Specifically, the third motor 315 is fixedly mounted on the first moving plate 311. The output end of the third motor 315 has a gear 320 that meshes with the rack 313. The third motor 315 drives the rack 313 to move in the vertical direction. The fourth motor 316 is fixedly mounted on the moving frame 323. The output end of the fourth motor 316 is coaxially fixedly mounted with a drive roller 328. The drive roller 328 is set vertically downward. The drive roller 328 and the second moving plate 312 have meshing teeth 329. The fourth motor 316 can make the drive roller 328 rotate, thereby making the second moving plate 312 move in the horizontal direction. Since the rack 313 is fixedly connected to the second moving plate 312, the first moving plate 311 can be moved in the horizontal direction at the same time.

[0046] Specifically, the welding frame 314 is fixedly installed on the second movable plate 312. The welding frame 314 includes a welding torch 34, a torch holder 341, a fifth motor 342, and a frame 343. The frame 343 is fixedly installed on the second movable plate 312. The welding torch 34 is disposed in the torch holder 341. The torch holder 341 is rotatably installed on the frame 343 via a connecting shaft 344. The connecting shaft 344 is fixedly connected to the output end of the fifth motor 342. The fifth motor 342 is fixedly installed on the frame 343. Through the fifth motor 342, the angle of the welding torch 34 can be adjusted so that the welding torch 34 can weld the reinforcing cage 5 more accurately.

[0047] Specifically, a camera 345 is installed on the frame 343 to detect the position of the welding torch 34 and the welding point, so that the position of the welding torch 34 can better meet the welding needs.

[0048] In this embodiment, the height adjustment mechanism 33 includes a support frame 331 and an electric push rod 332. Four support frames 331 are provided, with one end fixedly installed below the mounting ring 321 and the other end movably connected to four connecting columns 13 in the positioning frame 1. The fixed end of the electric push rod 332 is fixedly installed on the positioning frame 1, and the moving end is fixedly connected to the support frame 331. The electric push rod 332 can push the support frame 331 up and down, thereby allowing the welding torch 34 to better weld the reinforcing cage 5.

[0049] Specifically, in order to improve welding efficiency, multiple sets of drive mechanisms and welding mechanisms can be set on the annular slide rail slider module, and multiple welding guns can perform welding simultaneously to improve welding efficiency.

[0050] In this embodiment, the positioning frame 1 is also provided with a positioning component 2.

[0051] Specifically, the positioning component 2 is set inside the positioning frame 1. The positioning component 2 includes a fixed frame 21, a positioning mechanism 22 and a limiting mechanism 23. The fixed frame 21 is arranged in a ring shape and is fixedly installed on the positioning frame 1 by the mounting plate 211. After positioning, the fixed frame 21 is coaxially arranged with the steel casing 4, which can better limit the steel cage 5 when it is lowered, so that the steel cage 5 falls in the middle of the steel casing 4.

[0052] Specifically, the positioning mechanism 22 and the limiting mechanism 23 are mounted on the fixed frame 21. Both the positioning mechanism 22 and the limiting mechanism 23 have a driving part 24. The positioning mechanism 22 also has a positioning part 221, which is evenly distributed circumferentially below the fixed frame 21. The driving part 24 drives the positioning part 221, causing it to move simultaneously toward the steel casing 4. When all the positioning parts 221 are close to the steel casing 4, the axis of the steel casing 4 is collinear with the axis of the fixed frame 21. The limiting mechanism 23 also has a limiting part 231, which is evenly distributed circumferentially on the fixed frame 21. The driving part 24 enables the limiting part 231 to move simultaneously toward the axis of the fixed frame 21.

[0053] In this embodiment, both the positioning part 221 and the limiting part 231 have a fixed plate 25 and a movable plate 26. The fixed plate 25 is fixedly installed on the fixed frame 21. The movable plate 26 is horizontally slidably disposed on the fixed plate 25 by the linear slide rail slider module 27. The sliding direction is perpendicular to the axial direction of the fixed frame 21. The movable plate 26 is driven to move by the driving part 24.

[0054] Specifically, a positioning block 28 is fixedly installed at one end of the moving plate 26 of the positioning part 221 near the axis. The positioning blocks 28, which are evenly arranged in the circumference, move simultaneously towards the axis of the fixed frame 21 under the action of the driving part 24, and make contact with the outer periphery of the steel casing 4 during the movement. After all the positioning blocks 28 make contact with the outer periphery of the steel casing 4, the positioning frame 1 can be positioned so that the axis of the steel casing 4 is collinear with the fixed frame 21.

[0055] Specifically, a limiting frame 29 is provided at one end of the moving plate 26 of the limiting part 231 near the axis. A limiting roller 30 is rotatably installed inside the limiting frame 29. The axis of the limiting roller 30 is set horizontally and perpendicular to the moving direction of the moving plate 26. Three limiting rollers 30 are arranged linearly in the vertical direction. After the reinforcing cage 5 is hoisted into the positioning frame 1, under the action of the driving part 24, the circumferentially arranged limiting rollers 30 move towards the axis of the steel casing 4 at the same time, thereby pushing the reinforcing cage 5 to the upper middle of the steel casing 4, so that the axis of the reinforcing cage 5 is collinear with the axis of the steel casing 4. The rolling limiting rollers 30 do not affect the lowering of the reinforcing cage 5, ensuring the position and verticality of the reinforcing cage 5 during the lowering process.

[0056] In this embodiment, the drive unit 24 includes a first motor 241, a drive ring 242, a drive ring mounting bracket 243, an arc-shaped rack 244, and a connecting plate 245. The first motor 241 is fixedly mounted on the fixed frame 21 via a bracket 246, located on the outer side of the fixed frame 21. Several drive ring mounting brackets 243 are evenly arranged circumferentially around the outer periphery of the fixed frame 21. The drive ring 242 is fitted and rolled in contact with the drive ring mounting bracket 243, and the axis of the drive ring 242 is collinear with the axis of the fixed frame 21. The arc-shaped rack 244 is fixedly mounted on the drive ring 241. On ring 242, the output end of the first motor 241 has a gear 247 that meshes with the arc-shaped rack 244. The two ends of the connecting plate 245 are respectively rotatably installed with the moving frame 33 and the drive ring 242. Under the action of the first motor 241, the drive ring 242 can be driven to rotate on the drive ring mounting frame 243 through the meshing gear 247 and the arc-shaped rack 244. Under the action of the connecting plate 245, the moving plate 26 is simultaneously driven to move on the fixed plate 25, thereby realizing the clamping of the steel casing 4 or the limiting of the reinforcing cage 5.

[0057] Specifically, the drive ring mounting bracket 243 includes a support plate 248 and universal balls 249. The support plate 248 has an arc that matches the outer side of the fixed bracket 21. The support plate 248 is fixedly mounted on the outer side of the fixed bracket 21. The lower end of the support plate 248 is bent at 90° toward the side away from the fixed bracket 21, and has two mutually perpendicular mounting surfaces. The cross-section of the support plate 248 is L-shaped. The universal balls 249 are fixedly mounted on the two mounting surfaces, and several are evenly arranged circumferentially with the axis of the fixed bracket 21 as the center. The drive ring 242 is mounted on the universal balls 249, and the inner and lower sides of the drive ring 242 are fitted with the universal balls 249.

[0058] In this embodiment, a second set of limiting mechanisms 6 is provided above the positioning frame 1, which plays a limiting role on the second section of the steel cage 51 when it is hoisted in.

[0059] A construction method using a bridge pile foundation reinforcement cage welding device includes the following steps:

[0060] S1: After the positions of the first and second steel cage sections are fixed, start the welding device;

[0061] S2: Using an industrial camera, the position of the welding head of the welding torch relative to the point to be welded is detected. Based on the detected data, the position of the welding head is adjusted using a height adjustment mechanism, a second motor, a third motor, a fourth motor, and a fifth motor, so that the welding head contacts the position of the reinforcing cage to be welded.

[0062] S3: Start the welding torch and begin the welding process. Then, using the third motor, the welding torch moves up or down during the welding process to perform linear welding on the points to be welded.

[0063] S4: After welding one welding point, use the second motor to drive the moving frame to rotate around the outside of the steel cage so that the welding torch can reach the second welding point;

[0064] S5: Repeat steps S2 to S4 until all welding points are completed;

[0065] S6: The welding torch is returned to its initial position using the height adjustment mechanism, the second motor, the third motor, the fourth motor, and the fifth motor.

[0066] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A welding device for a bridge pile foundation reinforcing cage, comprising a steel casing and a reinforcing cage, wherein the steel casing is vertically installed inside a drilled hole, and the reinforcing cage is hoisted into the steel casing by a crane, characterized in that, include: A positioning frame, which is mounted on the outside of the steel casing; A welding device is provided inside the positioning frame and located above the steel casing. The welding device includes a welding mechanism, a driving mechanism, and a height adjustment mechanism. The welding mechanism is mounted on the driving mechanism, and the driving mechanism drives the welding mechanism to move around the outer periphery of the steel cage. The drive mechanism is located within the positioning frame via the height adjustment mechanism, above the steel casing. The drive mechanism includes a mounting ring, an annular slide rail slider module, a moving frame, an external gear ring, and a second motor. The mounting ring is fixedly mounted on the height adjustment mechanism, the annular slide rail slider module is fixedly mounted on the upper side of the mounting ring, the moving frame is fixedly mounted on the slider of the annular slide rail slider module, the second motor is fixedly mounted on the moving frame, and the external gear ring is fixedly mounted on the outer periphery of the mounting ring. The second motor meshes with the external gear ring via gears. The positioning frame is provided with a positioning component, which includes a fixed frame, a positioning mechanism, and a limiting mechanism. The fixed frame is arranged in a circular shape and is fixedly installed on the positioning frame by a mounting plate. The positioning mechanism and the limiting mechanism are arranged on the fixed frame. The positioning mechanism and the limiting mechanism each have a driving part. The positioning mechanism also has a positioning part, which is circumferentially and evenly arranged below the fixed frame. The limiting mechanism has a limiting part, which is circumferentially and evenly installed on the fixed frame. The driving part drives the positioning part and the limiting part to move towards the axis of the fixed frame. Both the positioning part and the limiting part have a fixed plate and a movable plate. The fixed plate is fixedly installed on the fixed frame. The movable plate is horizontally slidably disposed on the fixed plate by a linear slide rail slider module. The sliding direction is perpendicular to the axial direction of the fixed frame. The movable plate is driven to move by the driving part. A positioning block is fixedly installed at one end of the moving plate of the positioning part near the axis. The positioning blocks, which are evenly arranged in the circumference, move simultaneously towards the axis of the fixed frame under the action of the driving part, and contact and cooperate with the outer periphery of the steel casing during the movement. A limiting frame is provided at one end of the moving plate of the limiting part near the axis. A limiting roller is rotatably installed inside the limiting frame. The axis of the limiting roller is set horizontally and perpendicular to the moving direction of the moving plate. Three limiting rollers are arranged linearly in the vertical direction. After the reinforcing cage is hoisted into the positioning frame, under the action of the driving part, the circumferentially arranged limiting rollers move towards the axis of the steel casing at the same time, thereby pushing the reinforcing cage to the upper middle of the steel casing, so that the axis of the reinforcing cage is collinear with the axis of the steel casing.

2. The bridge pile foundation reinforcement cage welding device according to claim 1, characterized in that: The welding mechanism includes a first moving plate, a second moving plate, a rack, a welding frame, a third motor, and a fourth motor; The first movable plate is horizontally slidably mounted above the movable frame via a linear slide rail slider module. The first movable plate has a through mounting hole. The rack moves vertically within the mounting hole via the linear slide rail slider module. The lower end of the rack is fixedly connected to the second movable plate. The second movable plate is located below the first movable plate and is arranged parallel to the first movable plate.

3. The bridge pile foundation reinforcement cage welding device according to claim 2, characterized in that: The third motor is fixedly mounted on the first movable plate. The output end of the third motor meshes with the rack through a gear. The fourth motor is fixedly mounted on the movable frame. The output end of the fourth motor is coaxially fixedly mounted with a drive roller and is arranged vertically downward. The second movable plate and the drive roller have teeth that mesh with each other. The welding frame is fixedly mounted on the second movable plate.

4. The bridge pile foundation reinforcement cage welding device according to claim 3, characterized in that: The welding frame includes a welding torch, a torch holder, a fifth motor, and a frame. The frame is fixedly mounted on the second movable plate. The fifth motor is fixedly mounted on the frame. The output end of the fifth motor is set downward and is connected to the torch holder through a connecting shaft. The angle of the torch holder is adjusted by the fifth motor. The welding torch is fixedly mounted inside the torch holder.

5. The bridge pile foundation reinforcement cage welding device according to claim 4, characterized in that: The height adjustment mechanism includes a support frame and an electric push rod. One end of the support frame is fixedly installed below the mounting ring, and the other end is movably connected to the positioning frame. The fixed end of the electric push rod is fixedly installed on the positioning frame, and the moving end is fixedly connected to the support frame.

6. The bridge pile foundation reinforcement cage welding device according to claim 5, characterized in that: The positioning frame includes an upper positioning frame and a lower positioning frame, which are connected by several connecting columns. The upper positioning frame, the lower positioning frame, and the connecting columns form a three-dimensional frame structure, and there is a placement cavity in the middle that facilitates the hoisting of the reinforcing cage into the steel casing. The fixed frame is mounted on the connecting column via a mounting plate. The driving unit includes a first motor, a driving ring, a driving ring mounting bracket, an arc-shaped rack, and a connecting plate. The first motor is fixedly mounted on the fixed frame via a bracket. Several driving ring mounting brackets are evenly arranged around the outer periphery of the fixed frame. The driving ring and the driving ring mounting bracket are rolled and fitted together, and the axis of the driving ring is collinear with the axis of the fixed frame. The arc-shaped rack is fixedly mounted on the driving ring. The output end of the first motor meshes with the arc-shaped rack via a gear, and the two ends of the connecting plate are respectively rotatably engaged with the movable frame and the drive ring; The drive ring mounting bracket includes a support plate and universal ball bearings. The support plate has an arc that matches the outer side of the fixed bracket. The support plate is fixedly mounted on the outer side of the fixed bracket. The lower end of the support plate is bent at 90° toward the side away from the fixed bracket, forming two mutually perpendicular mounting surfaces. The universal ball bearings are evenly mounted on the mounting surface of the support plate with the axis of the fixed bracket as the center. The inner and lower sides of the drive ring are fitted with the universal ball bearings.

7. The bridge pile foundation reinforcement cage welding device according to claim 6, characterized in that: The support frame is slidably connected to the connecting column.

8. The bridge pile foundation reinforcement cage welding device according to claim 7, characterized in that: The drive roller is rotatably mounted on the moving frame.

9. The bridge pile foundation reinforcement cage welding device according to claim 8, characterized in that: The frame has a testing platform, and an industrial camera is mounted on the testing platform.

10. A construction method using the bridge pile foundation reinforcement cage welding device according to claim 9, characterized in that: Includes the following steps: S1: After the positions of the first and second steel cage sections are fixed, start the welding device; S2: Using an industrial camera, the position of the welding head of the welding torch relative to the point to be welded is detected. Based on the detected data, the position of the welding head is adjusted using a height adjustment mechanism, a second motor, a third motor, a fourth motor, and a fifth motor, so that the welding head contacts the position of the reinforcing cage to be welded. S3: Start the welding torch and begin the welding process. Then, use the third motor to move the welding torch up or down during the welding process to perform linear welding on the points to be welded. S4: After welding one welding point, use the second motor to drive the moving frame to rotate around the outside of the steel cage so that the welding gun can reach the second welding point; S5: Repeat steps S2 to S4 until all welding points are completed; S6: The welding torch is returned to its initial position using the height adjustment mechanism, the second motor, the third motor, the fourth motor, and the fifth motor.

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