Round ventilation pipeline surrounding type welding structure

Abstract

The utility model discloses a circular ventilating duct surrounding type welding structure which comprises a base, an upper cover seat is arranged at the top of the base, arc-shaped grooves are formed in the opposite sides of the base and the upper cover seat, the top of the base is rotationally connected with a threaded column, and the threaded column is connected with a threaded rod. The top of the threaded column penetrates through the top of the upper cover base and is in threaded connection with the upper cover base, and a first hand wheel is fixedly installed at the top of the threaded column. The two ventilation pipelines extend between the base and the upper cover seat, so that a welding gap between the two pipelines is right opposite to a welding gun, the lifting assembly is operated to drive the outer gear ring and the connecting ring to move up and down, and the ruler rod is matched with the spring to determine that the circle centers of the outer gear ring, the connecting ring and the pipelines are located on the same point. A second threaded rod is operated to enable the welding gun to be close to a welding seam, then a motor drives a gear to rotate, an outer gear ring and a connecting ring are made to rotate, and then the welding gun is driven to conduct surrounding welding around a pipeline.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation duct welding, and particularly relates to a circular ventilation duct circumferential welding structure. Background Technique

[0002] During the welding process of a circular ventilation duct, due to the large diameter of the duct, it is generally placed on the ground, and then the duct is rolled to realize the welding operation of two ducts. Due to the long length of the duct, it is difficult to apply force evenly during the rolling process of the duct, which easily causes a large gap at the contact position of the two ducts. Moreover, it is manual welding, which affects the welding accuracy. Therefore, we propose a circular ventilation duct circumferential welding structure to clamp the ends of the two ducts, effectively avoiding large gaps caused by the movement of the ducts. Then, the welding equipment automatically welds around the two ventilation ducts to improve the welding accuracy and effect. Content of the Utility Model

[0003] The purpose of the utility model is to provide a circular ventilation duct circumferential welding structure, which has the advantages of clamping the ends of the two ducts, effectively avoiding large gaps caused by the movement of the ducts, and then the welding equipment automatically welds around the two ventilation ducts to improve the welding accuracy and effect, so as to solve the above-mentioned background technical problems.

[0004] The technical solution of the utility model to solve the above technical problems is as follows: a circular ventilation duct circumferential welding structure, which includes a base: a top cover seat is arranged on the top of the base, arc grooves are respectively opened on one side of the base and the top cover seat opposite to each other, a threaded column is rotatably connected to the top of the base, the top of the threaded column penetrates through the top of the top cover seat and is threadedly connected to the top cover seat, a first handwheel is fixedly installed on the top of the threaded column, a lifting component is arranged in the inner cavity of the base, a connecting shell is arranged on one side of the lifting component, a motor is fixedly installed on one side of the connecting shell, an output shaft of the motor penetrates into the inner cavity of the connecting shell and is fixedly installed with a gear, an external toothed ring is arranged in the inner cavity of the connecting shell, the external toothed ring is meshed with the gear, a connecting ring is fixedly connected to one side of the external toothed ring, a movable frame is movably arranged through the connecting ring, a second threaded rod is rotatably connected to the inner cavity of the movable frame, one end of the second threaded rod penetrates to the outside of the connecting ring and is threadedly connected to the connecting ring, and a welding torch is fixedly installed on the movable frame.

[0005] Preferably, a scale rod is movably arranged through the surface of the connecting ring, a spring is sleeved on the surface of the scale rod, and two ends of the spring are respectively fixedly connected to the outer surface of the connecting ring and the scale rod.

[0006] Preferably, three limiting wheels are rotatably connected to the inner cavity of the connecting shell, and an annular groove for the three limiting wheels to roll is opened on the inner side of the external toothed ring.

[0007] Preferably, the lifting assembly includes a rectangular frame fixedly connected to the base. A first threaded rod is rotatably connected to the inner cavity of the rectangular frame. A threaded sleeve that slides in the inner cavity of the rectangular frame is threadedly connected to the surface of the first threaded rod. The connection shell is fixedly connected to the threaded sleeve.

[0008] Preferably, the top of the first threaded rod penetrates through the top of the rectangular frame and is fixedly installed with a second handwheel.

[0009] Preferably, two symmetrically arranged guide rods are fixedly connected to the bottom of the upper cover seat. Two guide holes for the guide rods to slide are opened on the top of the base.

[0010] The beneficial effects of the present utility model are as follows:

[0011] 1. In the present utility model, by extending two ventilation ducts between the base and the upper cover seat, the welding seam between the two ducts is directly opposite to the welding torch. By operating the lifting assembly, the outer gear ring and the connection ring are driven to move up and down. Through the cooperation of the scale rod and the spring, it is determined that the centers of the outer gear ring and the connection ring and the duct are located at the same point. By operating the second threaded rod, the welding torch is brought close to the weld seam. Then, the motor drives the gear to rotate, thereby causing the outer gear ring and the connection ring to rotate, and further driving the welding torch to perform circumferential welding around the duct, so as to clamp the ends of the two ducts, effectively preventing large gaps from occurring due to the movement of the ducts. Then, the welding equipment automatically welds around the two ventilation ducts, achieving the purpose of improving the welding accuracy and effect;

[0012] 2. In the present utility model, through the combined use of the limiting wheels and the annular groove, when the gear drives the outer gear ring to rotate, the inner wall of the annular groove will drive the three limiting wheels to roll, providing limit and guidance for the rotation of the outer gear ring, and improving the stability of the rotation of the outer gear ring and the connection ring;

[0013] 3. In the present utility model, through the combined use of the guide rods and the guide holes, when the upper cover seat moves up and down, the guide rods are driven to slide in the inner cavity of the guide holes, providing limit and guidance for the movement of the upper cover seat, effectively preventing the upper cover seat from rotating following the threaded column, and improving the stability of the up and down movement of the upper cover seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Through the detailed description in combination with the following drawings, the above and / or other aspects of the present utility model will become clearer and easier to understand. These drawings are only schematic and do not limit the present utility model, where:

[0015] Figure 1 is a three-dimensional schematic diagram of an embodiment of the present utility model;

[0016] Figure 2 is a three-dimensional schematic diagram of the lifting assembly and the connection ring of an embodiment of the present utility model;

[0017] Figure 3 Schematic perspective view of the connection shell and the connection ring according to an embodiment of the present utility model;

[0018] Figure 4 Schematic perspective exploded view of the connection shell and the external gear ring according to an embodiment of the present utility model.

[0019] In the drawings, the list of components represented by each reference numeral is as follows:

[0020] 1. Base, 2. Upper cover seat, 3. Arc-shaped groove, 4. Threaded post, 5. First handwheel, 6. Lifting assembly, 61. Rectangular frame, 62. First threaded rod, 63. Threaded sleeve, 64. Second handwheel, 7. Connection shell, 8. Motor, 9. Gear, 10. External gear ring, 11. Connection ring, 12. Movable frame, 13. Second threaded rod, 14. Welding torch, 15. Measuring rod, 16. Spring, 17. Limiting wheel, 18. Annular groove, 19. Guide rod, 20. Guide hole. Detailed implementation manners

[0021] Hereinafter, embodiments of the circular ventilation duct circumferential welding structure of the present utility model will be described with reference to the drawings.

[0022] Figures 1-4A circular ventilation duct surrounding welding structure showing an embodiment of the present utility model, which includes a base 1: A top cover seat 2 is provided on the top of the base 1. Arc-shaped grooves 3 are opened on one side of the base 1 and the top cover seat 2 that face each other. Two symmetric guide rods 19 are fixedly connected to the bottom of the top cover seat 2. Guide holes 20 for the guide rods 19 to slide are opened on the top of the base 1. Through the cooperation of the guide rods 19 and the guide holes 20, when the top cover seat 2 moves up and down, it drives the guide rods 19 to slide in the inner cavity of the guide holes 20, providing limit and guidance for the movement of the top cover seat 2, effectively avoiding the rotation of the top cover seat 2 following the rotation of the threaded column 4, and improving the stability of the up and down movement of the top cover seat 2. A threaded column 4 is rotatably connected to the top of the base 1. The top of the threaded column 4 penetrates through the top of the top cover seat 2 and is threadedly connected to the top cover seat 2. A handwheel 5 is fixedly installed on the top of the threaded column 4. A lifting assembly 6 is arranged in the inner cavity of the base 1. A connecting shell 7 is arranged on one side of the lifting assembly 6. The lifting assembly 6 includes a rectangular frame 61 fixedly connected to the base 1. A threaded rod 62 is rotatably connected to the inner cavity of the rectangular frame 61. A threaded sleeve 63 that slides in the inner cavity of the rectangular frame 61 is threadedly connected to the surface of the threaded rod 62. The connecting shell 7 is fixedly connected to the threaded sleeve 63. The top of the threaded rod 62 penetrates through the top of the rectangular frame 61 and a handwheel 64 is fixedly installed. A motor 8 is fixedly installed on one side of the connecting shell 7. The output shaft of the motor 8 penetrates into the inner cavity of the connecting shell 7 and a gear 9 is fixedly installed. An external tooth ring 10 is arranged in the inner cavity of the connecting shell 7. The external tooth ring 10 meshes with the gear 9. A connecting ring 11 is fixedly connected to one side of the external tooth ring 10. Three limiting wheels 17 are rotatably connected to the inner cavity of the connecting shell 7. An annular groove 18 for the three limiting wheels 17 to roll is opened on the inner side of the external tooth ring 10. Through the cooperation of the limiting wheels 17 and the annular groove 18, when the gear 9 drives the external tooth ring 10 to rotate, the inner wall of the annular groove 18 will drive the three limiting wheels 17 to roll, providing limit and guidance for the rotation of the external tooth ring 10, and improving the stability of the rotation of the external tooth ring 10 and the connecting ring 11. A movable frame 12 is arranged through the connecting ring 11. A threaded rod 13 is rotatably connected to the inner cavity of the movable frame 12. One end of the threaded rod 13 penetrates to the outside of the connecting ring 11 and is threadedly connected to the connecting ring 11. A welding torch 14 is fixedly installed on the movable frame 12. A scale rod 15 is arranged through the surface of the connecting ring 11. A spring 16 is sleeved on the surface of the scale rod 15. The two ends of the spring 16 are respectively fixedly connected to the outer surface of the connecting ring 11 and the scale rod 15.

[0023] Working principle: When the present utility model is used, the user inserts two ventilation ducts into the inner cavity of the arc-shaped groove 3 between the base 1 and the top cover seat 2, and then operates the handwheel 5 to drive the threaded column 4 to rotate, so that the top cover seat 2 presses on the surface of the duct to fix the duct. The welding gap between the two ducts is directly opposite to the welding torch 14;

[0024] According to the outer diameter of the pipeline, operate the outer gear ring 10 and the connecting ring 11 so that the center of the pipeline is on the same horizontal line as the centers of the outer gear ring 10 and the connecting ring 11. There is a height difference between the center of the pipeline placed in the inner cavity of the arc-shaped groove 3 and the centers of the outer gear ring 10 and the connecting ring 11. Then operate the second handwheel 64 to drive the first threaded rod 62 to rotate, thereby driving the threaded sleeve 63 to move up and down. The threaded sleeve 63 drives the outer gear ring 10 and the connecting ring 11 to move up and down through the connecting shell 7. The scale rod 15 against the surface of the pipeline, according to the numbers on the scale rod 15 and the outer diameter of the pipeline, makes the centers of the outer gear ring 10 and the connecting ring 11 on the same horizontal line as the center of the pipeline. Rotate the second threaded rod 13. Due to the thread, the movable frame 12 drives the welding torch 14 to move, so that the welding torch 14 approaches the weld between the two pipelines. Then the motor 8 works to drive the gear 9 to rotate, thereby making the meshing outer gear ring 10 rotate under the limitation of the limiting wheel 17 and the annular groove 18, and then driving the connecting ring 11 to rotate. The connecting ring 11 drives the welding torch 14 in the working state to perform circumferential welding around the pipeline. It should be noted that the outer gear ring 10 and the connecting ring 11 will rotate in the reverse direction every time they rotate one circle, so that the pipeline connected to the welding torch 14 will not get entangled.

[0025] To sum up: For this circular ventilation pipeline circumferential welding structure, by inserting the two ventilation pipelines between the base 1 and the upper cover seat 2, the welding gap between the two pipelines is directly opposite to the welding torch 14. By operating the lifting assembly 6, the outer gear ring 10 and the connecting ring 11 are driven to move up and down. Through the cooperation of the scale rod 15 and the spring 16, it is determined that the centers of the outer gear ring 10 and the connecting ring 11 are at the same point as the center of the pipeline. By operating the second threaded rod 13, the welding torch 14 is brought close to the weld. Then the motor 8 drives the gear 9 to rotate, thereby making the outer gear ring 10 and the connecting ring 11 rotate, and then driving the welding torch 14 to perform circumferential welding around the pipeline, so as to clamp the ends of the two pipelines, effectively avoiding large gaps caused by the movement of the pipelines. Then the welding equipment automatically welds around the two ventilation pipelines, achieving the purpose of improving the welding accuracy and effect.

Claims

1. A circular ventilation duct surrounding welding structure, characterized in that: The invention comprises a base (1): an upper cover seat (2) is arranged on the top of the base (1); an arc groove (3) is provided on the side of the base (1) opposite to the upper cover seat (2); a threaded column (4) is rotatably connected to the top of the base (1); the top of the threaded column (4) penetrates through the top of the upper cover seat (2) and is threadedly connected to the upper cover seat (2); a hand wheel (5) is fixedly installed on the top of the threaded column (4); a lifting component (6) is arranged in the inner cavity of the base (1); a connecting shell (7) is arranged on one side of the lifting component (6); a motor (8) is fixedly installed on one side of the connecting shell (7); the motor (8) ) passes through the inner cavity of the connecting shell (7) and is fixedly mounted with a gear (9); the inner cavity of the connecting shell (7) is provided with an outer gear ring (10), the outer gear ring (10) is meshed with the gear (9); one side of the outer gear ring (10) is fixedly connected with a connecting ring (11); a movable movable frame (12) is passed through the connecting ring (11); the inner cavity of the movable frame (12) is rotatably connected with a threaded rod (13); one end of the threaded rod (13) passes through the outer side of the connecting ring (11) and is threadedly connected to the connecting ring (11); a welding gun (14) is fixedly mounted on the movable frame (12).

2. A circular ventilation duct surrounding welding structure according to claim 1, characterized in that: A ruler rod (15) is provided through the surface of the connecting ring (11), a spring (16) is sleeved on the surface of the ruler rod (15), and two ends of the spring (16) are respectively fixedly connected to the outer surface of the connecting ring (11) and the ruler rod (15).

3. A circular ventilation duct surrounding welding structure according to claim 2, characterized in that: The inner cavity of the connection shell (7) is rotatably connected to three limiting wheels (17), and the inner side of the outer gear ring (10) is provided with an annular groove (18) for the three limiting wheels (17) to roll.

4. A circular ventilation duct surrounding welding structure according to claim 3, characterized in that: The lifting assembly (6) comprises a rectangular frame (61) fixedly connected to the base (1); the inner cavity of the rectangular frame (61) is rotatably connected to a threaded rod (62); the surface of the threaded rod (62) is threadedly connected to a threaded sleeve (63) that slides in the inner cavity of the rectangular frame (61); and the connecting shell (7) is fixedly connected to the threaded sleeve (63).

5. A circular ventilation duct surrounding welding structure according to claim 4, characterized in that: The top of the threaded rod 1 (62) penetrates the top of the rectangular frame (61) and is fixedly mounted with a hand wheel 2 (64).

6. A circular ventilation duct surrounding welding structure according to claim 5, characterized in that: Two symmetrical guide rods (19) are fixedly connected to the bottom of the upper cover seat (2), and two guide holes (20) for the guide rods (19) to slide are provided on the top of the base (1).

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