An inner clamping type steel pipe welding fixture

Abstract

This invention discloses an internal clamping steel pipe welding fixture, belonging to the field of steel pipe welding technology. It includes a base plate, casing wheels, and other components. The threads at both ends of a double-threaded rod have opposite directions. The double-threaded rod and a smooth rod are mounted side-by-side on the base plate. A first motor output shaft is connected to a first bevel gear, and a second bevel gear, cooperating with the first bevel gear, is fixedly installed in the middle of the double-threaded rod. Two clamping mechanisms are mounted opposite each other on a threaded sleeve. Two moving plates are symmetrically and slidably mounted in grooves at both ends of the base plate. A placement platform is fixed to the upper end of each moving plate. In this invention, the clamping mechanism utilizes multiple contact parts to simultaneously perform multi-point positioning inside the steel pipe. Simultaneously, the height of the clamping mechanism can be adjusted, allowing the steel pipe to be stabilized in the air directly through the clamping mechanism. This not only adjusts the two steel pipes to be welded to a concentric, deviation-free state but also avoids obstructing the steel pipes, facilitating welding, grinding, polishing, and other work, and improving the accuracy of their joining and post-processing.

Description

Technical Field

[0001] This invention relates to an internal clamping steel pipe welding fixture, belonging to the field of steel pipe welding technology. Background Technology

[0002] Steel pipes are frequently used in industrial production and construction. Typically, two steel pipes are placed horizontally aligned and clamped by two separate clamping mechanisms before welding. Internal clamping steel pipe welding fixtures, by supporting the pipe from the inside, not only avoid damaging the pipe surface but also prevent obstruction of any area, allowing for post-processing work such as grinding and polishing. Currently, existing clamping devices hold the pipe from the outside in. While the pipe is usually rotated during welding, it's difficult to ensure that the two pipes rotate at the same speed and are concentric, reducing the effectiveness of the welding and the quality of the weld.

[0003] Based on this, it is necessary to propose an internal clamping steel pipe welding fixture. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an internal clamping steel pipe welding fixture for clamping steel pipes from the inside out, while simultaneously enabling two steel pipes to rotate synchronously.

[0005] The technical solution of the present invention is: an internal clamping steel pipe welding fixture, comprising a base plate 1, a cascading wheel 4, a double-ended threaded rod 9, a smooth rod 8, a first motor 12, a moving plate 2, a clamping mechanism 6, and a threaded sleeve 14 simultaneously installed on the double-ended threaded rod 9 and the smooth rod 8. The threaded sleeve 14 comprises two symmetrically arranged parts. The cascading wheel 4 is fixedly installed at the bottom of the base plate 1. The threads at both ends of the double-ended threaded rod 9 have opposite directions. The double-ended threaded rod 9 and the smooth rod 8 are installed side by side on the base plate 1. The output shaft of the first motor 12 is connected to a first bevel gear 11. A second bevel gear 10 that cooperates with the first bevel gear 11 is fixedly installed in the middle of the double-ended threaded rod 9. The two clamping mechanisms 6 are installed opposite each other on the threaded sleeve 14. The two moving plates 2 are symmetrically and slidably installed in the sliding grooves 7 at both ends of the base plate 1. A placement platform 3 is fixed at the upper end of the moving plate 2.

[0006] Specifically, the two ends of the double-threaded rod 9 are rotatably connected to the two sides of the base plate 1, and the two ends of the smooth rod 8 are fixedly connected to the two sides of the base plate 1.

[0007] Specifically, the cassette wheel 4 includes: a wheel sleeve 44, a bearing 45, a cassette plate 46, and a bottom wheel 47. The cassette plate 46 is movably mounted on the wheel sleeve 44, and the bearing 45 and the bottom wheel 47 are both fixedly mounted on the wheel sleeve 44. The wheel sleeve 44 is fixedly connected to the shaft at the bottom of the base plate 1 through the bearing 45.

[0008] Specifically, the clamping mechanism 6 includes a hydraulic cylinder 15, a support frame 17, a second motor 21, a rotating shaft 23, a rotating disk 22, a cylinder 35, and an internal support mechanism 5. One end of the hydraulic cylinder 15 is fixedly installed above the threaded sleeve 14, and the other end is connected to a hydraulic rod 16. The upper end of the hydraulic rod 16 is fixedly connected to the support frame 17. The top of the support frame 17 has a shaft hole 18 for the rotating shaft 23 to pass through. One end of the rotating shaft 23 is fixedly installed with a rotating shaft 19, and one end of the rotating shaft 19 is fixedly installed with a meshing third bevel gear 20. The third bevel gear 20 is connected to the output shaft of the second motor 21. The second motor 21 is fixedly installed on the support frame 17. One end of the rotating shaft 23 is fixedly connected to one side of the rotating disk 22. The rotating shaft 23 is fixedly installed with a third motor 24 inside. The output shaft of the third motor 24 is connected to a fourth bevel gear 25. Multiple fifth bevel gears 26 are engaged in annular meshing on wheel 25. Multiple threaded rods 27 are connected to the ends of the multiple fifth bevel gears 26. The multiple threaded rods 27 are fixedly installed on the rotating disk 22 through the round holes 29 on the surface of the rotating shaft 23. Multiple slots 34 are opened on the rotating disk 22. Telescopic plates 28 are movably installed on the multiple threaded rods 27 fixedly connected to the rotating disk 22. The ends of the telescopic plates 28 pass through the through holes on the rotating disk 22. Pressure sensors 33 are installed at the ends of the telescopic plates 28. Lifting rods 31 are fixedly connected above the pressure sensors 33. Arc-shaped support plates 30 are fixedly connected above the lifting rods 31. A first spring 32 is connected between the pressure sensors 33 and the arc-shaped support plates 30. A cylinder 35 is fixedly installed at the center of the other side of the rotating disk 22. Telescopic rods 36 are connected to the front end of the cylinder 35. An internal support mechanism 5 is installed at the top of the telescopic rods 36.

[0009] More specifically, the internal support mechanism 5 includes a thick support rod, a thin support rod, a rotating block 37, a telescopic block 38, and a contact sensor 40. One end of the thick support rod is fixedly connected to the telescopic rod 36, and the other end is fixedly connected to the center of one side of the rotating block 37. The rotating block 37 has a plurality of telescopic grooves 39 arranged in a ring. The telescopic blocks 38 that can extend and retract outward are installed inside the telescopic grooves 39. One end of the thin support rod is fixedly connected to the center of the other side of the rotating block 37, and the other end is fixedly connected to the contact sensor 40.

[0010] Specifically, the movable plate 2 is movably mounted on the slide rod 13 in the slide groove 7 on the base plate 1. One end of the movable plate 2 is provided with a cylindrical groove 43, and a handle 42 is fixedly installed in the cylindrical groove 43. The handle 42 is connected to the bottom of the cylindrical groove 43 by a second spring 41.

[0011] The beneficial effects of this invention are as follows: This invention utilizes a handle on one side of the movable plate on the adjusting base plate to adjust the placement platform on the movable plate to a suitable position, thereby allowing two steel pipes to be stably placed on the placement platform. Furthermore, the first motor drives the clamping mechanism to move closer or further away from each other along with the threaded sleeve. When the two clamping mechanisms move closer, the two steel pipes can be brought closer together until their ends abut, achieving a stable clamping. Further, the cylinder causes the contact sensor at the front end of the internal support mechanism to contact, and the second motor drives the gear mechanism to move the telescopic plate upward, driving the arc-shaped support plate upward, while the telescopic block also moves upward, supporting the steel pipe from the inside and increasing its clamping stability. Further still, the hydraulic cylinder drives the support frame upward, causing the steel pipe to detach from the placement platform. The third motor drives the rotating disk to rotate synchronously with the rotating shaft, ensuring that the two steel pipes maintain the same rotational speed, preventing weld misalignment, further improving the welding effect, and facilitating subsequent grinding, polishing, and other post-processing work. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the connection between the first motor, the double-threaded rod, and the smooth rod of the present invention; Figure 3 This is a schematic diagram of the clamping mechanism of the present invention; Figure 4 This is an enlarged schematic diagram of the rotating shaft portion of the present invention; Figure 5 This is an enlarged schematic diagram of the rotating disk portion of the present invention; Figure 6 This is a cross-sectional view of the movable plate portion of the present invention; Figure 7 This is an enlarged schematic diagram of the cassette wheel portion of the present invention.

[0013] The following are the labels in the diagram: 1. Base plate; 2. Movable plate; 3. Placement platform; 4. Caster wheel; 5. Internal support mechanism; 6. Clamping mechanism; 7. Slide groove; 8. Smooth rod; 9. Double-ended threaded rod; 10. Second bevel gear; 11. First bevel gear; 12. First motor; 13. Slide rod; 14. Threaded sleeve; 15. Hydraulic cylinder; 16. Hydraulic rod; 17. Support frame; 18. Shaft hole; 19. Rotating shaft; 20. Third bevel gear; 21. Second motor; 22. Rotating disk; 23. Rotating shaft; 24. 25. Third motor; 26. Fourth bevel gear; 27. Fifth bevel gear; 28. Threaded rod; 29. ​​Telescopic plate; 30. Round hole; 31. Arc-shaped support plate; 32. Lifting rod; 33. First spring; 34. Pressure sensor; 35. Slot; 36. Cylinder; 37. Telescopic rod; 38. Rotating block; 39. Telescopic block; 40. Telescopic slot; 41. Contact sensor; 42. Second spring; 43. Handle; 44. Cylindrical slot; 45. Wheel sleeve; 46. Bearing; 47. Clamping plate; 48. Bottom wheel. Detailed Implementation

[0014] The invention will be further described below with reference to the accompanying drawings and embodiments, but the scope of the invention is not limited to the description.

[0015] Example 1: As Figure 1-7 As shown, an internal clamping steel pipe welding fixture includes a base plate 1, a cascading wheel 4, a double-ended threaded rod 9, a smooth rod 8, a first motor 12, a moving plate 2, a clamping mechanism 6, and a threaded sleeve 14 simultaneously installed on the double-ended threaded rod 9 and the smooth rod 8. The threaded sleeve 14 includes two symmetrically arranged sleeves. The cascading wheel 4 is fixedly installed at the bottom of the base plate 1. The threads at both ends of the double-ended threaded rod 9 have opposite directions. The double-ended threaded rod 9 and the smooth rod 8 are installed side by side on the base plate 1. The output shaft of the first motor 12 is connected to a first bevel gear 11. A second bevel gear 10 that cooperates with the first bevel gear 11 is fixedly installed in the middle of the double-ended threaded rod 9. The two clamping mechanisms 6 are installed opposite each other on the threaded sleeve 14. The two moving plates 2 are symmetrically and slidably installed in the sliding grooves 7 at both ends of the base plate 1. A placement platform 3 is fixed to the upper end of the moving plate 2.

[0016] Furthermore, the two ends of the double-ended threaded rod 9 are rotatably connected to both sides of the base plate 1, and the two ends of the smooth rod 8 are fixedly connected to both sides of the base plate 1.

[0017] Furthermore, such as Figure 7 As shown, the cassette wheel 4 includes: wheel sleeve 44, bearing 45, cassette plate 46 and bottom wheel 47. The cassette plate 46 is movably mounted on the wheel sleeve 44. The bearing 45 and the bottom wheel 47 are both fixedly mounted on the wheel sleeve 44. The wheel sleeve 44 is fixedly connected to the shaft at the bottom of the base plate 1 through the bearing 45. Lowering the cassette plate 46 can fix the wheel and prevent it from rolling.

[0018] Furthermore, such as Figure 1, 3 As shown in Figures 4 and 5, the clamping mechanism 6 includes a hydraulic cylinder 15, a support frame 17, a second motor 21, a rotating shaft 23, a rotating disk 22, a cylinder 35, and an internal support mechanism 5. One end of the hydraulic cylinder 15 is fixedly installed above the threaded sleeve 14, and the other end is connected to a hydraulic rod 16. The upper end of the hydraulic rod 16 is fixedly connected to the support frame 17. The top of the support frame 17 has a shaft hole 18 for the rotating shaft 23 to pass through. One end of the rotating shaft 23 is fixedly installed with a rotating shaft 19, and one end of the rotating shaft 19 is fixedly installed with a meshing third bevel gear 20. The third bevel gear 20 is connected to the output shaft of the second motor 21, and the second motor 21 is fixedly installed on the support frame 17. The hydraulic cylinder 15 causes the clamping mechanism 6 above the hydraulic rod 16 to move up and down, facilitating the clamping and welding of the steel pipe before and after welding.

[0019] One end of the rotating shaft 23 is fixedly connected to one side of the rotating disk 22. A third motor 24 is fixedly installed inside the rotating shaft 23. A fourth bevel gear 25 is connected to the output shaft of the third motor 24. Multiple fifth bevel gears 26 are annularly meshed on the fourth bevel gear 25. Multiple threaded rods 27 are connected to the ends of the multiple fifth bevel gears 26. The multiple threaded rods 27 are fixedly installed on the rotating disk 22 through the circular holes 29 on the surface of the rotating shaft 23. Multiple slots 34 are opened on the rotating disk 22. Telescopic plates 28 are movably installed on the multiple threaded rods 27 fixedly connected to the rotating disk 22. The ends of the telescopic plates 28 pass through the through holes on the rotating disk 22. A pressure sensor 33 is installed at the end of the telescopic plates 28. A lifting rod 31 is fixedly connected above the pressure sensor 33. An arc-shaped support plate 30 is fixedly connected above the lifting rod 31. A first spring 32 is connected between the pressure sensor 33 and the arc-shaped support plate 30. When the arc-shaped support plate 30 contacts the inner wall of the pipe, it compresses the first spring 32 through the compression lifting rod 31. The first spring 32 transmits the pressure to the pressure sensor 33. After the pressure sensor 33 detects the appropriate pressure, it stops the third motor 24.

[0020] A cylinder 35 is fixedly installed at the center of the other side of the rotating disk 22. A telescopic rod 36 is connected to the front end of the cylinder 35, and an internal support mechanism 5 is installed at the top of the telescopic rod 36.

[0021] Furthermore, the internal support mechanism 5 includes a thick support rod, a thin support rod, a rotating block 37, a telescopic block 38, and a contact sensor 40. One end of the thick support rod is fixedly connected to the telescopic rod 36, and the other end is fixedly connected to the center of one side of the rotating block 37. The rotating block 37 has multiple telescopic grooves 39 arranged in a ring, and the telescopic blocks 38 that can extend and retract outward are installed inside the telescopic grooves 39. One end of the thin support rod is fixedly connected to the center of the other side of the rotating block 37, and the other end is fixedly connected to the contact sensor 40. After the contact sensors 40 at the front end of the internal support mechanism 5 come into contact with each other, the cylinder 35 stops the telescopic rod 36 from extending and retracting, and at the same time drives the third motor 24 and the telescopic block 38 on the rotating block 37.

[0022] Furthermore, such as Figure 1 , 2 As shown in Figure 6, the movable plate 2 is movably mounted on the slide rod 13 in the slide groove 7 on the base plate 1. One end of the movable plate 2 has a cylindrical groove 43, and a handle 42 is fixedly installed in the cylindrical groove 43. The handle 42 is connected to the bottom of the cylindrical groove 43 by a second spring 41. After the handle 42 is pulled out, it can rotate and contact the base plate 1. The elastic force of the second spring 41 stabilizes the movable plate 2.

[0023] The working principle and usage process of this invention are as follows: Lowering the locking plate 46 on the cassette wheel 4 will fix the wheel in place and prevent it from rolling.

[0024] Adjust the movable plate 2 inside the base plate 1 to place the steel pipe stably on the placement platform 3. Start the first motor 12 to drive the double-headed threaded rod 9 to rotate. The double-headed threaded rod 9 drives the threaded sleeve 14 to move in opposite directions through the threads with opposite directions, moving closer or further away from each other. When the two threaded sleeves 14 are close to each other, the clamping mechanism 6 can make the two ends of the two steel pipes abut against each other, ensuring that the two steel pipes are tightly attached together. The cylinder 35 extends the telescopic rod 36 to contact the contact sensor 40 at the front end of the internal support mechanism 5. After contact, the cylinder 35 stops driving. At the same time, the rotating block 37 extends the telescopic block 38 and starts the third motor 24 to drive the fourth bevel gear 25 and the fifth bevel gear 26 to rotate, thereby causing the telescopic plate 28 on the rotating disk 22 to move upward. The arc-shaped support plate 30 on the telescopic plate 28 contacts the inner wall of the pipe. After the arc-shaped support plate 30 contacts the inner wall of the pipe, it squeezes the first spring 32 through the compression lifting rod 31. The first spring 32 transmits the pressure to the pressure sensor 33. After the pressure sensor 33 detects the appropriate pressure, it stops the third motor 24, so that the steel pipe is firmly clamped without obstructing its surface, which is convenient for post-processing work such as grinding and polishing. Hydraulic cylinder 15 drives support frame 17 on hydraulic rod 16 to move upward, so that the clamped steel pipe is away from the placement platform 3. By starting the second motor 21, the meshing third bevel gear 20 drives the rotating shaft 19 to rotate. The rotating shaft 19 drives the rotating shaft 23 to rotate. The rotating disk 22 rotates through the rotating shaft 23. When the rotating disk 22 rotates, it drives the arc support plate 30 and the telescopic block 38 to rotate synchronously, so that the two steel pipes can maintain the same rotation speed, prevent weld misalignment, and further improve the welding quality.

[0025] In this invention, the clamping mechanism uses multiple contact parts to simultaneously position the steel pipe at multiple points. At the same time, the height of the clamping mechanism can be adjusted, and the steel pipe is directly stabilized in the air by the clamping mechanism. This not only adjusts the two steel pipes to be welded to a state of concentricity and no deviation, but also does not obstruct the steel pipe, which facilitates welding, grinding, polishing and other work, and improves the accuracy of their docking and post-processing.

[0026] It should be noted that the terms "first," "second," etc., used in this invention are used to distinguish similar objects and should not be construed as indicating or implying relative importance.

[0027] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An inside clamp type steel pipe welding fixture, characterized by: The system includes a base plate (1), a cassette wheel (4), a double-ended threaded rod (9), a smooth rod (8), a first motor (12), a moving plate (2), a clamping mechanism (6), and a threaded sleeve (14) installed on both the double-ended threaded rod (9) and the smooth rod (8). The threaded sleeve (14) includes two symmetrically arranged parts. The cassette wheel (4) is fixedly installed at the bottom of the base plate (1). The threads at both ends of the double-ended threaded rod (9) are in opposite directions. The double-ended threaded rod (9) and the smooth rod (8) are installed side by side on the base plate (1). The output shaft of the first motor (12) is connected to a first bevel gear (11). A second bevel gear (10) that cooperates with the first bevel gear (11) is fixedly installed in the middle of the double-ended threaded rod (9). The two clamping mechanisms (6) are installed opposite to each other on the threaded sleeve (14). The two moving plates (2) are symmetrically and slidably installed in the grooves (7) at both ends of the base plate (1). The upper end of the moving plate (2) is fixed with a placement platform (3). The clamping mechanism (6) includes a hydraulic cylinder (15), a support frame (17), a second motor (21), a rotating shaft (23), a rotating disk (22), a cylinder (35), and an internal support mechanism (5). One end of the hydraulic cylinder (15) is fixedly installed above the threaded sleeve (14), and the other end is connected to a hydraulic rod (16). The upper end of the hydraulic rod (16) is fixedly connected to the support frame (17). The top of the support frame (17) has a shaft hole (18) for the rotating shaft (23) to pass through. One end of the rotating shaft (23) is fixedly installed... A rotating shaft (19) is fixedly installed, and a third bevel gear (20) is fixedly installed at one end of the rotating shaft (19). The third bevel gear (20) is connected to the output shaft of the second motor (21). The second motor (21) is fixedly installed on the support frame (17). One end of the rotating shaft (23) is fixedly connected to one side of the rotating disk (22). A third motor (24) is fixedly installed inside the rotating shaft (23). A fourth bevel gear (25) is connected to the output shaft of the third motor (24). 25) Multiple fifth bevel gears (26) are meshed on the upper ring. Multiple threaded rods (27) are connected to the ends of the multiple fifth bevel gears (26). The multiple threaded rods (27) pass through the round holes (29) on the surface of the rotating shaft (23) and are fixedly installed on the rotating disk (22). Multiple slots (34) are opened on the rotating disk (22). Telescopic plates (28) are movably installed on the multiple threaded rods (27) fixedly connected to the rotating disk (22). The ends of the telescopic plates (28) pass through the through holes on the rotating disk (22). A pressure sensor (33) is installed at the end of the telescopic plate (28). A lifting rod (31) is fixedly connected above the pressure sensor (33). An arc-shaped support plate (30) is fixedly connected above the lifting rod (31). A first spring (32) is connected between the pressure sensor (33) and the arc-shaped support plate (30). A cylinder (35) is fixedly installed at the center of the other side of the rotating disk (22). A telescopic rod (36) is connected to the front end of the cylinder (35). An internal support mechanism (5) is installed at the top of the telescopic rod (36).

2. An inside clamp type pipe welding fixture according to claim 1, characterized in that: The two ends of the double-threaded rod (9) are rotatably connected to the two sides of the base plate (1), and the two ends of the smooth rod (8) are fixedly connected to the two sides of the base plate (1).

3. The internal clamping steel pipe welding fixture according to claim 1, characterized in that: The casing wheel (4) includes: wheel sleeve (44), bearing (45), casing plate (46) and bottom wheel (47). The casing plate (46) is movably mounted on the wheel sleeve (44). The bearing (45) and the bottom wheel (47) are both fixedly mounted on the wheel sleeve (44). The wheel sleeve (44) is fixedly connected to the shaft at the bottom of the base plate (1) through the bearing (45).

4. The internal clamping steel pipe welding fixture according to claim 1, characterized in that: The internal support mechanism (5) includes a thick support rod, a thin support rod, a rotating block (37), a telescopic block (38), and a contact sensor (40). One end of the thick support rod is fixedly connected to the telescopic rod (36), and the other end is fixedly connected to the center of one side of the rotating block (37). The rotating block (37) has multiple telescopic grooves (39) in a ring. The telescopic block (38) that can extend outward is installed inside the telescopic groove (39). One end of the thin support rod is fixedly connected to the center of the other side of the rotating block (37), and the other end is fixedly connected to the contact sensor (40).

5. The internal clamping steel pipe welding fixture according to claim 1, characterized in that: The movable plate (2) is movably installed on the slide rod (13) in the slide groove (7) on the base plate (1). A cylindrical groove (43) is opened at one end of the movable plate (2). A handle (42) is fixedly installed in the cylindrical groove (43). The handle (42) is connected to the bottom of the cylindrical groove (43) by a second spring (41).

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