Butt welding and shaping tool for smoke flue round pipe

Abstract

This utility model discloses a welding and shaping fixture for the butt welding of circular flue pipes, which solves the problem of difficulty in adjusting the inner and outer walls when welding two sections of circular flue pipes. It includes a lower section circular flue pipe (16) and an upper section circular flue pipe (17). An inner horizontal cantilever rod (4) and an inner arc-shaped shaping plate (18) are connected to the inner lifting rod (3). The inner arc-shaped shaping plate (18) is abutted on the inner wall of the butt joint. An outer column sleeve (22) is provided on the right side of the lower section circular flue pipe (16). An outer lifting rod (23) is provided in the upper port of the outer column sleeve (22). A horizontal hydraulic cylinder (21) and an outer horizontal cantilever rod (20) are provided at the top of the outer lifting rod (23). An outer arc-shaped shaping plate (19) is connected to the end of the outer horizontal cantilever rod (20). The outer arc-shaped shaping plate (19) is abutted on the outer wall of the butt joint. The structure is simple and the operation is easy.

Description

Technical Field

[0001] This utility model relates to a steel boiler circular flue pipe, and particularly to a shaping tool used for butt welding of two circular flue pipe sections. Background Technology

[0002] Flue gas ducts are the pipes for exhausting flue gas and intake air in industrial boilers. They are equipped with dampers to regulate airflow and pressure. The ducts are divided into horizontal flue gas ducts and tail flue gas ducts. Flue gas ducts are generally made of steel circular pipes. These circular flue gas ducts are crucial components in boiler systems for transporting flue gas. The circular design of the pipes, compared to other shapes, results in the smallest circumference for the same cross-sectional area, effectively reducing material usage and heat dissipation area. Simultaneously, the circular structure distributes stress evenly, better bearing the pressure of the flue gas inside the pipe and reducing the likelihood of deformation. Circular flue gas ducts require multiple sections of circular pipes to be welded together to form the duct. Currently, assembling flue gas ducts presents challenges, including difficulty in rotating and moving the pipes, and difficulty in aligning the inner and outer walls of the two connected pipes. On-site adjustments are typically made using welded limit blocks and wedges, making the entire assembly process both time-consuming and labor-intensive. Summary of the Invention

[0003] This utility model provides a butt welding and shaping fixture for circular flue pipes, which solves the technical problem of difficulty in adjusting the inner and outer walls when butt welding two sections of circular flue pipes.

[0004] This utility model solves the above technical problems through the following technical solution: A welding and shaping fixture for a circular flue gas duct includes a pre-embedded central base plate, a lower section of the circular flue gas duct, and an upper section of the circular flue gas duct. A central column sleeve is fixedly connected to the pre-embedded central base plate. An inner lifting upright is movably inserted into the top port of the central column sleeve. A horizontal bearing is sleeved at the lower end of the central column sleeve. A left horizontal telescopic beam, a right horizontal telescopic beam, a front horizontal telescopic beam, and a rear horizontal telescopic beam are fixedly connected to the outer wall of the outer ring of the horizontal bearing. A pair of left-end universal wheels are provided on the bottom end face of the left horizontal telescopic beam, a pair of right-end universal wheels are provided on the bottom end face of the right horizontal telescopic beam, a pair of front-end universal wheels are provided on the bottom end face of the front horizontal telescopic beam, and a pair of rear-end universal wheels are provided on the bottom end face of the rear horizontal telescopic beam. The lower section of the circular flue gas duct is placed vertically on the left, right, front, and rear horizontal telescopic beams, allowing the lower section of the circular flue gas duct to rotate around the central column sleeve. The column sleeve rotates; an upper section of the circular flue gas duct is installed at the upper end of the lower section of the circular flue gas duct, and the lower end of the upper section of the circular flue gas duct is connected to the upper end of the lower section of the circular flue gas duct; an inner horizontal cantilever is connected to the inner lifting upright, and an inner arc-shaped shaping plate is connected to the outer end of the inner horizontal cantilever, which abuts against the inner wall of the joint between the lower end of the upper section of the circular flue gas duct and the upper end of the lower section of the circular flue gas duct; on the right side of the lower section of the circular flue gas duct... An outer column sleeve is provided, and an outer lifting column is provided in the upper end of the outer column sleeve. A horizontal hydraulic cylinder is provided at the top of the outer lifting column. An outer horizontal cantilever is connected to the leftward horizontal extension shaft of the horizontal hydraulic cylinder. An outer arc-shaped shaping plate is connected to the end of the outer horizontal cantilever. The outer arc-shaped shaping plate is attached to the outer wall of the joint between the lower end of the upper flue gas duct circular pipe and the upper end of the lower flue gas duct circular pipe. The outer arc-shaped shaping plate and the inner arc-shaped shaping plate are set in a corresponding manner.

[0005] A left-end limiting plate is provided on the top surface of the outer end of the left horizontal telescopic beam, a right-end limiting plate is provided on the top surface of the outer end of the right horizontal telescopic beam, a front-end limiting plate is provided on the top surface of the outer end of the front horizontal telescopic beam, and a rear-end limiting plate is provided on the top surface of the outer end of the rear horizontal telescopic beam.

[0006] The bottom end of the outer column sleeve is set on the outer column sleeve base, and bolt through holes for fixing the outer column sleeve are provided on the outer column sleeve base along the left and right directions.

[0007] This invention features a simple structure and convenient assembly, which greatly improves the assembly efficiency of the boiler's circular flue gas duct. Attached Figure Description

[0008] Figure 1 This is a structural schematic diagram of the present invention in the main viewing direction; Figure 2 is a schematic diagram of the structure of this utility model from a top view. Detailed Implementation

[0009] The present invention will now be described in detail with reference to the accompanying drawings: A welding and shaping fixture for a circular flue gas duct includes a pre-embedded central base plate 1, a lower section circular flue gas duct 16, and an upper section circular flue gas duct 17. A central column sleeve 2 is fixedly connected to the pre-embedded central base plate 1. An inner lifting rod 3 is movably inserted into the top end of the central column sleeve 2. A horizontal bearing 5 is sleeved at the lower end of the central column sleeve 2. A left horizontal telescopic beam 6, a right horizontal telescopic beam 7, a front horizontal telescopic beam 8, and a rear horizontal telescopic beam 9 are fixedly connected to the outer wall of the outer ring of the horizontal bearing 5, respectively. The four horizontal telescopic beams are arranged on the same horizontal plane. A pair of left-end casters 10 are provided on the bottom end face of the telescopic beam 6; a pair of right-end casters 11 are provided on the bottom end face of the right horizontal telescopic beam 7; a pair of front-end casters are provided on the bottom end face of the front horizontal telescopic beam 8; and a pair of rear-end casters are provided on the bottom end face of the rear horizontal telescopic beam 9. The lower section of the flue gas duct circular pipe 16 is vertically placed on the left horizontal telescopic beam 6, the right horizontal telescopic beam 7, the front horizontal telescopic beam 8, and the rear horizontal telescopic beam 9, allowing the lower section of the flue gas duct circular pipe 16 to rotate around the central column sleeve 2; an upper... The upper section of the flue gas duct circular pipe 17 is joined at its lower end to the upper end of the lower section of the flue gas duct circular pipe 16. An inner horizontal cantilever rod 4 is connected to the inner lifting upright 3, allowing adjustment of its height based on the height of the joint between the two flue gas duct circular pipes. An inner arc-shaped shaping plate 18 is connected to the outer end of the inner horizontal cantilever rod 4, resting against the inner wall of the joint between the lower end of the upper section of the flue gas duct circular pipe 17 and the upper end of the lower section of the flue gas duct circular pipe 16. An outer column sleeve 22 is installed on the right side of the lower section of the flue gas duct circular pipe 16. An outer lifting pole 23 is installed in the upper port of the column sleeve 22. A horizontal hydraulic cylinder 21 is installed at the top of the outer lifting pole 23. An outer horizontal cantilever rod 20 is connected to the leftward horizontal extension shaft of the horizontal hydraulic cylinder 21. An outer arc-shaped shaping plate 19 is connected to the end of the outer horizontal cantilever rod 20. The outer arc-shaped shaping plate 19 is pressed against the outer wall of the joint between the lower port of the upper flue gas duct circular pipe 17 and the upper port of the lower flue gas duct circular pipe 16. The outer arc-shaped shaping plate 19 and the inner arc-shaped shaping plate 18 are correspondingly set. The shaping and smooth connection of the joint are achieved by the pressing of the two arc-shaped shaping plates.

[0010] A left end limiting plate 12 is provided on the top surface of the outer end of the left horizontal telescopic beam 6, a right end limiting plate 13 is provided on the top surface of the outer end of the right horizontal telescopic beam 7, a front end limiting plate 14 is provided on the top surface of the outer end of the front horizontal telescopic beam 8, and a rear end limiting plate 15 is provided on the top surface of the outer end of the rear horizontal telescopic beam 9. The four limiting plates realize the limiting of the lower section flue gas duct circular pipe 16 placed in opposition.

[0011] The bottom end of the outer column sleeve 22 is set on the outer column sleeve base 24. The outer column sleeve base 24 has a row of bolt through holes for fixing the outer column sleeve 22 in the left and right direction. The distance between the outer column sleeve 22 and the two circular pipes of the flue can be adjusted to achieve the top pressure shaping of the joint. After adjustment, the bottom end of the outer column sleeve 22 is fixed to the outer column sleeve base 24 by connecting bolts. Diagonal bracing rods can also be set on the outer column sleeve 22 to make the outer column sleeve 22 more stable.

[0012] During use, the lower flue gas duct circular pipe 16 is first placed vertically on the rotating base, which consists of a left horizontal telescopic beam 6, a right horizontal telescopic beam 7, a front horizontal telescopic beam 8, and a rear horizontal telescopic beam 9. Then, the upper flue gas duct circular pipe 17 is connected to the upper end of the lower flue gas duct circular pipe 16. By adjusting the inner horizontal cantilever rod 4, the inner arc-shaped shaping plate 18 is pressed against the inner wall of the joint between the lower end of the upper flue gas duct circular pipe 17 and the upper end of the lower flue gas duct circular pipe 16. The horizontal hydraulic cylinder 21 is then activated, causing the outer horizontal cantilever rod 20 to... Extend to the left and place the outer arc-shaped shaping plate 19 connected to the end against the outer wall of the joint between the lower end of the upper flue gas duct circular pipe 17 and the upper end of the lower flue gas duct circular pipe 16, thus shaping the joint at this point. Then, spot weld the joint together. Next, retract the inner horizontal cantilever rod 4 and the outer horizontal cantilever rod 20, causing the rotating base to rotate 90 degrees, shaping and welding the second spot weld point. Then, rotate 90 degrees in sequence to shape and spot weld the four mutually perpendicular points together. Finally, by gradually rotating the rotating base, the shaping and welding of the 360-degree joint is completed.

Claims

1. A butt welding and shaping fixture for a circular flue gas duct, comprising a pre-embedded central base plate (1), a lower section circular flue gas duct (16), and an upper section circular flue gas duct (17), characterized in that, A central column sleeve (2) is fixedly connected to the pre-embedded central base plate (1). An inner lifting rod (3) is movably inserted into the top port of the central column sleeve (2). A horizontal bearing (5) is sleeved at the lower end of the central column sleeve (2). A left horizontal telescopic beam (6), a right horizontal telescopic beam (7), a front horizontal telescopic beam (8), and a rear horizontal telescopic beam (9) are fixedly connected to the outer wall of the outer ring of the horizontal bearing (5). A pair of left-end universal wheels (10) are provided on the bottom end face of the left horizontal telescopic beam (6). A pair of right-end casters (11) are provided on the upper part of the horizontal telescopic beam (8). A pair of front-end casters are provided on the bottom surface of the front horizontal telescopic beam (8). A pair of rear-end casters are provided on the bottom surface of the rear horizontal telescopic beam (9). The lower section flue gas duct circular pipe (16) is vertically placed on the left horizontal telescopic beam (6), the right horizontal telescopic beam (7), the front horizontal telescopic beam (8), and the rear horizontal telescopic beam (9), so that the lower section flue gas duct circular pipe (16) can rotate around the central column sleeve (2). An upper section flue gas duct circular pipe (16) is provided on the upper end of the lower section flue gas duct circular pipe (16). 17), the lower end of the upper flue gas duct circular pipe (17) is connected to the upper end of the lower flue gas duct circular pipe (16); an inner horizontal cantilever rod (4) is connected to the inner lifting upright (3), and an inner arc-shaped shaping plate (18) is connected to the outer end of the inner horizontal cantilever rod (4). The inner arc-shaped shaping plate (18) is abutted against the inner wall of the joint between the lower end of the upper flue gas duct circular pipe (17) and the upper end of the lower flue gas duct circular pipe (16); an outer column sleeve (22) is provided on the right side of the lower flue gas duct circular pipe (16). An external lifting pole (23) is provided in the upper port. A horizontal hydraulic cylinder (21) is provided at the top of the external lifting pole (23). An outer horizontal cantilever rod (20) is connected to the horizontal extension shaft of the horizontal hydraulic cylinder (21) to the left. An outer arc-shaped shaping plate (19) is connected to the end of the outer horizontal cantilever rod (20). The outer arc-shaped shaping plate (19) is abutted on the outer wall of the gap between the lower port of the upper flue gas duct circular pipe (17) and the upper port of the lower flue gas duct circular pipe (16). The outer arc-shaped shaping plate (19) and the inner arc-shaped shaping plate (18) are set in correspondence.

2. The butt welding and shaping fixture for a circular flue gas duct pipe according to claim 1, characterized in that, A left end limiting plate (12) is provided on the top surface of the outer end of the left horizontal telescopic beam (6), a right end limiting plate (13) is provided on the top surface of the outer end of the right horizontal telescopic beam (7), a front end limiting plate (14) is provided on the top surface of the outer end of the front horizontal telescopic beam (8), and a rear end limiting plate (15) is provided on the top surface of the outer end of the rear horizontal telescopic beam (9).

3. The butt welding and shaping fixture for a circular flue gas duct pipe according to claim 2, characterized in that, The bottom end of the outer column sleeve (22) is set on the outer column sleeve base (24), and the outer column sleeve base (24) is provided with bolt through holes for fixing the outer column sleeve (22) in the left and right directions.

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