A stainless steel pipe rotating mechanism and a welding apparatus comprising the same

Abstract

The application discloses a stainless steel pipe rotating mechanism and welding equipment containing the same, relates to the technical field of stainless steel pipe welding equipment, and comprises a bottom plate, one side of the bottom plate is fixedly connected with a fixed plate, the other side of the bottom plate is provided with a moving plate, a moving assembly for driving the moving plate to move is arranged on the bottom plate, the fixed plate and the moving plate are fixedly connected with mounting vertical plates at two ends, and U-shaped grooves are arranged in the middle of the mounting vertical plates. The driving turntable and the driven turntable which are provided with V-shaped grooves can be used for conveniently placing the stainless steel pipe, meanwhile, the fixing assembly arranged simultaneously can be used for fixing the steel pipe after the steel pipe is placed, so that the stainless steel pipe only needs to be placed into the V-shaped grooves on the driving turntable and the driven turntable during use, the complicated pipe penetrating action is avoided, meanwhile, the manual clamping is not needed during the fixing of the steel pipe, and the convenience and the working efficiency of the stainless steel pipe welding are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stainless steel pipe welding equipment, in particular to a stainless steel pipe rotating mechanism and a welding equipment containing the same. BACKGROUND

[0002] Stainless steel pipe is a hollow long strip circular steel material, which is mainly widely used in petroleum, chemical industry, medical treatment, food, light industry, mechanical instrument and other industries for conveying pipeline and mechanical structure parts; in the application of stainless steel pipe, the pipe needs to be welded according to the demand.

[0003] As disclosed in the authorized announcement CN114310140B, an automatic welding equipment and a welding method, the equipment includes a workbench, an adjusting device, a rotating device, a fixing device, a clamping device and a welding device, the workbench is provided with the adjusting device on the upper end, the rotating device is rotatably installed on the inner side of the adjusting device, the fixing device is installed on the left side of the rotating device, and the lifting plate and the T-shaped block are lowered by the extension end of the lifting cylinder, so that the lifting plate drives the welding head to descend to weld the steel pipe, avoiding the complicated process of manual welding and improving the welding efficiency of the steel pipe.

[0004] Although the above-mentioned equipment can realize the welding work of the stainless steel pipe, the device needs manual clamping when fixing the stainless steel pipe, and the stainless steel pipe needs to be passed through the round hole on the fixing plate during clamping, so the stainless steel pipe must be manually moved to pass through the fixing hole of the clamping structure during clamping, which consumes a lot of physical strength and increases the labor intensity of workers, therefore, the present application provides a stainless steel pipe rotating mechanism and a welding equipment containing the same to solve the above-mentioned problems. SUMMARY

[0005] The present application aims to provide a stainless steel pipe rotating mechanism and a welding equipment containing the same to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] The utility model provides a stainless steel pipe rotating mechanism, including the bottom plate, one side of the bottom plate is fixedly connected with fixed plate, the other side of the bottom plate is equipped with the moving plate, be equipped with the moving component of the drive moving plate on the bottom plate and move, the fixed plate and the moving plate both ends are fixedly connected with the installation vertical board, the middle of installation vertical board is equipped with U type groove, the moving plate and the fixed plate top between installation vertical board position is equipped with the rotating frame, be equipped with the limiting component for the rotating frame is positioned on the installation vertical board, the installation vertical board is equipped with the rotating component for driving rotating frame rotates still, be equipped with the fixing component for the stainless steel pipe is clamped in the rotating frame, the middle of bottom plate is equipped with the positioning component for the stainless steel pipe is positioned still.

[0008] As a further aspect of the present application: the moving assembly includes a sliding seat, the sliding seat is fixedly connected at the lower end of the moving plate, the upper end of the bottom plate is fixedly connected with a T-shaped rail on both sides below the moving plate, the sliding seat is slidingly connected with the T-shaped rails on both sides, the upper end of the bottom plate is fixedly connected with a third electric cylinder below the middle of the moving plate, and the output end of the third electric cylinder is fixedly connected with the lower end of the moving plate through a support.

[0009] As a further aspect of the present application: the rotating frame includes a driven turntable and a driving turntable, a plurality of fixed links are fixedly connected between the driven turntable and the driving turntable, V-shaped grooves are formed in the driven turntable and the driving turntable, and a transmission gear is fixedly connected to one end of the circumferential surface of the driving turntable.

[0010] As a further aspect of the present application: the limiting assembly includes a plurality of first limiting wheels, the first limiting wheels are rotatably connected to the installation vertical boards on the opposite ends of the fixed plate and the moving plate, the first limiting wheels are uniformly distributed at the circumferential position of the driven turntable, the surface of the first limiting wheels is in contact with the circumferential surface of the driven turntable, second limiting wheels are rotatably connected to the installation vertical boards on the opposite ends of the fixed plate and the moving plate, the second limiting wheels are distributed at the circumferential position of the driving turntable, and the surface of the second limiting wheels is in contact with the circumferential surface of the driving turntable.

[0011] As a further aspect of the present application: the rotating assembly includes three end shafts, the end shafts are rotatably connected to the installation vertical boards below the driving turntable, the three end shafts are uniformly distributed on both sides and in the middle of the lower end of the driving turntable, first gears are fixedly connected to one end of the end shafts close to the driving turntable, the first gears are engaged with the transmission gear, second gears are fixedly connected to the other end of the end shafts away from the first gears, idlers are rotatably connected between adjacent second gears, the idlers are engaged with the adjacent second gears, and a driving assembly is arranged on the installation vertical board to drive the end shafts to rotate.

[0012] As a further embodiment of the present invention: the driving component includes a stepper motor, the stepper motor is fixedly connected to the lower end of the mounting vertical plate at the end of the fixed plate away from the moving plate, the output end of the stepper motor is fixedly connected to a transmission shaft, the end of the transmission shaft away from the stepper motor is fixedly connected to a corresponding end shaft, an internal hexagonal sleeve shaft is provided in the middle upper part of the base plate, a hexagonal shaft is slidably connected inside the internal hexagonal sleeve shaft, and the opposite ends of the internal hexagonal sleeve shaft and the hexagonal shaft are respectively fixedly connected to the end shafts located on both sides of the base plate.

[0013] As a further embodiment of the present invention: the fixing component includes a flipping shaft, which is rotatably connected between one side of the driven turntable and the driving turntable. Both ends of the flipping shaft are fixedly connected to pipe clamps for fixing stainless steel pipes. Several pull arms are also fixedly connected to the flipping shaft. Tension springs are installed between the ends of the pull arms and adjacent fixing links. An actuating arm is fixedly connected in the middle of the flipping shaft. Side plate seats are fixedly connected to one side of the base plate at positions corresponding to the actuating arms. A support frame is fixedly connected to the side plate seat. A first electric cylinder is fixedly connected to the support frame. Rollers are rotatably connected to the output end of the first electric cylinder.

[0014] As a further embodiment of the present invention: the positioning component includes a vertical slide rod, which is fixedly connected to the middle position of one side of the upper end face of the base plate. A sliding sleeve is slidably connected to the vertical slide rod, and a positioning block is fixedly connected to one side of the sliding sleeve. A second electric cylinder is fixedly connected to the upper end face of the base plate near the vertical slide rod, and the output end of the second electric cylinder is fixedly connected to the positioning block.

[0015] As a further embodiment of the present invention: the mounting vertical plate is provided with ball bearings on the side near the pull arm, and the ball bearings are distributed in a ring.

[0016] A welding device includes the aforementioned stainless steel pipe rotating mechanism, and further includes a vertical slide fixedly connected to the middle of one side of a base plate. A lifting frame is slidably connected to the vertical slide, and a fourth electric cylinder is provided on one side of the vertical slide to push the lifting frame up and down. A welding torch is installed at the end of the lifting frame.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This invention utilizes an active and driven turntable with V-shaped grooves to facilitate the placement of stainless steel pipes. The included fixing components secure the pipes after placement, eliminating the need for cumbersome pipe-threading procedures. Furthermore, the invention eliminates the need for manual clamping during pipe fixing, significantly improving the convenience and efficiency of stainless steel pipe welding. The positioning components also accurately position the two stainless steel pipes to be welded, ensuring precise alignment and preventing subsequent welding misalignment, thus enhancing welding accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one side of the stainless steel tube rotating mechanism.

[0020] Figure 2 This is a schematic diagram of the other side of the stainless steel tube rotating mechanism.

[0021] Figure 3 This is a schematic diagram of the rotating frame in a stainless steel pipe rotating mechanism.

[0022] Figure 4 This is a schematic diagram of the positioning component in a stainless steel tube rotation mechanism.

[0023] Figure 5 This is a partial structural diagram of a stainless steel tube rotating mechanism.

[0024] Figure 6 This is a schematic diagram of the active turntable in a stainless steel tube rotating mechanism.

[0025] Figure 7 This is a schematic diagram of the drive assembly in a stainless steel tube rotation mechanism.

[0026] Figure 8 This is a schematic diagram of the moving component in a stainless steel tube rotating mechanism.

[0027] Figure 9 This is a schematic diagram of the welding equipment.

[0028] Figure 10 This is a partial structural diagram of the welding equipment.

[0029] The components include: 1. Base plate; 2. Fixed plate; 3. T-rail; 4. Moving plate; 5. Sliding seat; 6. First limit wheel; 7. Driven turntable; 8. Fixed connecting rod; 9. Roller; 10. Mounting vertical plate; 11. Active turntable; 12. First electric cylinder; 13. U-shaped groove; 14. Stainless steel pipe; 15. Stepper motor; 16. Tilting shaft; 17. Pull arm; 18. Pipe clamp; 19. V-shaped groove; 20. Transmission gear; 21. Tension spring; 2. Action arm; 23. Support frame; 24. Side plate seat; 25. Positioning block; 26. Second electric cylinder; 27. Vertical slide rod; 28. Sliding sleeve; 29. ​​Drive shaft; 30. First gear; 31. Second gear; 32. Hexagonal socket shaft; 33. Hexagonal shaft; 34. End shaft; 35. Idler wheel; 36. Second limit wheel; 37. Third electric cylinder; 38. Vertical slide; 39. Lifting frame; 40. Welding torch; 41. Fourth electric cylinder. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-8 In this embodiment of the invention, a stainless steel pipe rotating mechanism includes a base plate 1. A fixed plate 2 is fixedly connected to one side of the base plate 1, and a movable plate 4 is provided on the other side of the base plate 1. A moving assembly for driving the movable plate 4 to move is provided on the base plate 1. The moving assembly includes a sliding seat 5, which is fixedly connected to the four corners of the lower end face of the movable plate 4. T-shaped rails 3 are fixedly connected to both sides of the upper end face of the base plate 1 below the movable plate 4. The sliding seat 5 is slidably connected to the T-shaped rails 3 on both sides. A third electric cylinder 37 is fixedly connected to the upper end face of the base plate 1 below the middle of the movable plate 4. The output end of the third electric cylinder 37 is fixedly connected to the lower end face of the movable plate 4 by means of a support. When the movable plate 4 is pushed to move, the output end of the third electric cylinder 37 moves to push the movable plate 4 along the T-shaped rails 3. The sliding cooperation between the sliding seat 5 and the T-shaped rails 3 can ensure the stability and smoothness of the sliding of the movable plate 4.

[0032] Both ends of the fixed plate 2 and the movable plate 4 are fixedly connected to mounting vertical plates 10. Each mounting vertical plate 10 has a U-shaped groove 13 in the middle. A rotating frame is provided above the movable plate 4 and the fixed plate 2 at the position between the mounting vertical plates 10. The rotating frame includes a driven turntable 7 and a driven turntable 11. Several fixed connecting rods 8 are fixedly connected between the driven turntable 7 and the driven turntable 11. Both the driven turntable 7 and the driven turntable 11 have V-shaped grooves 19. One end of the circumference of the driven turntable 11 is fixedly connected to a transmission tooth 20 for transmission. The V-shaped grooves 19 provided on the driven turntable 11 and the driven turntable 7 can be used to place stainless steel pipes 14. The two V-shaped grooves 19 support the stainless steel pipes 14, and can then cooperate with the fixing components to fix the stainless steel pipes 14.

[0033] The mounting vertical plate 10 is provided with a limiting component for limiting the rotation frame. The limiting component includes a plurality of first limiting wheels 6, which are rotatably connected to the mounting vertical plate 10 at the opposite ends of the fixed plate 2 and the movable plate 4. The first limiting wheels 6 are evenly distributed around the circumference of the driven turntable 7, and the surface of the first limiting wheels 6 is in contact with the circumferential surface of the driven turntable 7. Second limiting wheels 36 are rotatably connected to the mounting vertical plate 10 at the opposite ends of the fixed plate 2 and the movable plate 4. The second limiting wheels 36 are distributed around the driving turntable. At position 11, the surface of the second limiting wheel 36 contacts the circumferential surface of the active turntable 11; the mounting vertical plate 10 is provided with ball bearings on the side near the pull arm 17, and the ball bearings are distributed in a ring; through the multiple second limiting wheels 36 and the first limiting wheel 6, the active turntable 11 and the driven turntable 7 can be limited, so that the active turntable 11 and the driven turntable 7 can only rotate within the space restricted by the second limiting wheels 36 and the first limiting wheel 6. At the same time, the ball bearings can reduce the friction between the driven turntable 7 and the active turntable 11 and the mounting vertical plate 10.

[0034] The mounting vertical plate 10 is also equipped with a rotating assembly for driving the rotating frame to rotate. The rotating assembly includes three end shafts 34, each of which is rotatably connected to the mounting vertical plate 10 below the drive turntable 11. The three end shafts 34 are evenly distributed on both sides and the middle of the lower end of the drive turntable 11. A first gear 30 is fixedly connected to the end of each end shaft 34 near the drive turntable 11, and the first gear 30 meshes with the transmission gear 20. A second gear 31 is fixedly connected to the end of each end shaft 34 away from the first gear 30. An idler gear 35 is rotatably connected between each adjacent second gear 31, and the idler gear 35 meshes with the adjacent second gear 31. The mounting vertical plate 10 is equipped with a driving assembly for driving the end shafts 34 to rotate. During operation, the driving assembly drives the end shafts 34 to rotate, which in turn drives the second gears 31 to rotate. The rotation of the second gears 31 drives the idler gears 35 on both sides to rotate. The two idler gears 35 transmit power to the second gears 31 on both sides of the mounting vertical plate 10, thereby causing the three first gears 30 to rotate. The synchronous rotation ensures that even when the V-groove 19 of the drive turntable 11 passes through one of the first gears 30, the other two first gears 30 still mesh with the transmission gears 20, thus ensuring continuous power transmission and avoiding the problem of interruption of rotational power caused by the V-groove 19.

[0035] The driving assembly includes a stepper motor 15, which is fixedly connected to the lower end of the mounting vertical plate 10 at the end of the fixed plate 2 away from the moving plate 4. A drive shaft 29 is fixedly connected to the output end of the stepper motor 15. The end of the drive shaft 29 away from the stepper motor 15 is fixedly connected to a corresponding end shaft 34. An internal hexagonal sleeve 32 is provided above the middle of the base plate 1. A hexagonal shaft 33 is slidably connected within the internal hexagonal sleeve 32. The opposite ends of the internal hexagonal sleeve 32 and the hexagonal shaft 33 are respectively connected to the ends located on both sides of the base plate 1. The end shaft 34 is fixedly connected; when the drive end shaft 34 rotates, the stepper motor 15 drives the transmission shaft 29 to rotate. The rotation of the transmission shaft 29 can drive the end shaft 34 on one side to rotate. At the same time, the internal hexagonal sleeve shaft 32 and the hexagonal shaft 33 can transmit power to the other end shaft 34, thereby realizing the synchronous rotation of the active turntable 11 above the fixed plate 2 and the moving plate 4. Meanwhile, the internal hexagonal sleeve shaft 32 and the hexagonal shaft 33 are slidably connected, so they can adapt to the movement of the moving plate 4, so that the movement of the moving plate 4 can also ensure normal transmission.

[0036] The rotating frame is equipped with a fixing assembly for clamping the stainless steel pipe 14. The fixing assembly includes a tilting shaft 16, which is rotatably connected between the driven turntable 7 and the driving turntable 11. Pipe clamps 18 for fixing the stainless steel pipe 14 are fixedly connected to both ends of the tilting shaft 16. Several pull arms 17 are also fixedly connected to the tilting shaft 16. Tension springs 21 are installed between the ends of the pull arms 17 and adjacent fixing links 8. An actuating arm 22 is fixedly connected to the middle of the tilting shaft 16. Side plate seats 24 are fixedly connected to one side of the base plate 1 at positions corresponding to the actuating arm 22. A support frame 23 is fixedly connected to the side plate seat 24. A first electric cylinder 12 is fixedly connected to the upper part, and rollers 9 are rotatably connected to the output end of the first electric cylinder 12. When fixing the stainless steel pipe 14, the output end of the first electric cylinder 12 drives the rollers 9 to move. The movement of the rollers 9 pushes the bottom of the action arm 22, causing the action arm 22 to rotate against the tension of the tension spring 21. The rotation of the action arm 22 can drive the flipping shaft 16 to rotate synchronously. The rotation of the flipping shaft 16 can drive the pipe clamp 18 to rotate synchronously. After the pipe clamp 18 rotates and opens, stainless steel can be inserted into the V-groove 19. After the stainless steel pipe 14 is inserted, the output end of the first electric cylinder 12 is reset. Then, the pull arm 17 rotates under the tension of the tension spring 21. The pull arm 17 drives the flip shaft 16 to rotate. The rotation of the pull arm 17 can drive the pipe clamp 18 to reset so that the pipe clamp 18 clamps the stainless steel pipe 14. The combined force of the tension of multiple tension springs 21 is used to clamp the stainless steel pipe 14. The tension of the tension spring 21 makes the pipe clamp 18 cooperate with the V-groove 19 to form a ring-shaped fixation on the steel pipe, ensuring that the steel pipe does not shift during rotation.

[0037] The base plate 1 is also provided with a positioning component for positioning the stainless steel pipe 14 in the middle. The positioning component includes a vertical slide rod 27, which is fixedly connected to the middle of one side of the upper end face of the base plate 1. A sliding sleeve 28 is slidably connected to the vertical slide rod 27. A positioning block 25 is fixedly connected to one side of the sliding sleeve 28. A second electric cylinder 26 is fixedly connected to the upper end face of the base plate 1 near the vertical slide rod 27. The output end of the second electric cylinder 26 is fixedly connected to the positioning block 25. When positioning the steel pipe, the welding ends of the two stainless steel pipes 14 to be welded can be pushed against the two surfaces of the positioning block 25 respectively. Then, the second electric cylinder 26 drives the positioning block 25 to descend to avoid the obstruction, thereby realizing the positioning of the two stainless steel pipes 14 and ensuring the accuracy of the weld during subsequent docking.

[0038] Please see Figures 9-10A welding device includes the aforementioned stainless steel pipe rotating mechanism, and further includes a vertical slide 38 fixedly connected to the middle of one side of a base plate 1. A lifting frame 39 is slidably connected to the vertical slide 38. A fourth electric cylinder 41 is provided on one side of the vertical slide 38 to push the lifting frame 39 up and down. A welding torch 40 is installed at the end of the lifting frame 39. When welding a stainless steel pipe 14, the aforementioned stainless steel pipe rotating mechanism is used to rotate the stainless steel pipe 14. Then, the fourth electric cylinder 41 drives the lifting frame 39 to descend so that the welding torch 40 reaches the set position. Then, the welding torch 40, in conjunction with the rotation of the stainless steel pipe 14, can complete the welding of the stainless steel pipe 14.

[0039] The working principle of this invention is as follows: When welding stainless steel pipes 14, the output end of the first electric cylinder 12 drives the roller 9 to move. The movement of the roller 9 pushes the bottom of the action arm 22, causing the action arm 22 to rotate against the tension of the tension spring 21. The rotation of the action arm 22 drives the flipping shaft 16 to rotate synchronously. The rotation of the flipping shaft 16 drives the pipe clamp 18 to rotate synchronously. After the pipe clamp 18 rotates, it opens. Then, the two stainless steel pipes 14 to be welded are placed in the rotating frame above the fixed plate 2 and the moving plate 4, respectively. The welding ends of the two stainless steel pipes 14 to be welded are respectively pushed against the two surfaces of the positioning block 25. Then, the second electric cylinder 26 drives the positioning block 25 to descend to avoid the weld. Then, the output end of the first electric cylinder 12 is reset. Then, the pull arm 17 is pulled by the tension spring 21. Under the pulling force of 1, the pull arm 17 drives the flip shaft 16 to rotate. The rotation of the pull arm 17 can drive the pipe clamp 18 to reset and clamp the pipe clamp 18 onto the stainless steel pipe 14. The combined pulling force of multiple tension springs 21 is used to clamp the stainless steel pipe 14. During welding, the second electric cylinder 26 first drives the positioning block 25 to descend to avoid obstacles. Then the moving component drives the moving plate 4 to move towards the fixed plate 2, so that the ends of the two stainless steel pipes 14 are connected together. After docking, the fourth electric cylinder 41 drives the lifting frame 39 to descend and the welding torch 40 reaches the set position. Then the rotating component drives the rotating frame to rotate and the stainless steel pipe 14 rotates. At the same time as the rotation, the welding torch 40 performs welding synchronously. After the rotating frame rotates one revolution, it stops, thus completing the welding of the stainless steel pipe 14.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Although this specification describes embodiments, not every embodiment contains only one technical solution. This method of description is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stainless steel pipe rotating mechanism, comprising a base plate (1), characterized in that: A fixed plate (2) is fixedly connected to one side of the base plate (1), and a movable plate (4) is provided on the other side of the base plate (1). A movable component is provided on the base plate (1) to drive the movable plate (4) to move. A mounting vertical plate (10) is fixedly connected to both ends of the fixed plate (2) and the movable plate (4). A U-shaped groove (13) is provided in the middle of the mounting vertical plate (10). A rotating frame is provided above the movable plate (4) and the fixed plate (2) at the position between the mounting vertical plate (10). A limiting component is provided on the mounting vertical plate (10) to limit the rotation frame. A rotating component is also provided on the mounting vertical plate (10) to drive the rotating frame to rotate. A fixed component is provided inside the rotating frame to clamp the stainless steel pipe (14). A positioning component is also provided in the middle of the base plate (1) to position the stainless steel pipe (14). The rotating frame includes a driven turntable (7) and a driven turntable (11). Several fixed connecting rods (8) are fixedly connected between the driven turntable (7) and the driven turntable (11). V-shaped grooves (19) are opened on both the driven turntable (7) and the driven turntable (11). A transmission tooth (20) for transmission is fixedly connected to one end of the circumferential surface of the driven turntable (11). The limiting component includes several first limiting wheels (6), which are rotatably connected to the mounting vertical plate (10) at the opposite end of the fixed plate (2) and the moving plate (4). The first limiting wheels (6) are evenly distributed around the circumference of the driven turntable (7), and the surface of the first limiting wheel (6) is in contact with the circumference of the driven turntable (7). Second limiting wheels (36) are rotatably connected to the mounting vertical plate (10) at the opposite end of the fixed plate (2) and the moving plate (4). The second limiting wheels (36) are distributed around the circumference of the active turntable (11), and the surface of the second limiting wheel (36) is in contact with the circumference of the active turntable (11). The rotating assembly includes three end shafts (34), each of which is rotatably connected to the mounting plate (10) located below the active turntable (11). The three end shafts (34) are evenly distributed on both sides and in the middle of the lower end of the active turntable (11). A first gear (30) is fixedly connected to the end of each end shaft (34) near the active turntable (11), and the first gear (30) meshes with the transmission gear (20). A second gear (31) is fixedly connected to the end of each end shaft (34) away from the first gear (30). An idler wheel (35) is rotatably connected between two adjacent second gears (31), and the idler wheel (35) meshes with the adjacent second gear (31). The mounting plate (10) is provided with a drive assembly for driving the end shafts (34) to rotate. The drive assembly includes a stepper motor (15), which is fixedly connected to the lower end of the mounting vertical plate (10) of the fixed plate (2) away from the moving plate (4). The output end of the stepper motor (15) is fixedly connected to a transmission shaft (29). The end of the transmission shaft (29) away from the stepper motor (15) is fixedly connected to a corresponding end shaft (34). The middle upper part of the base plate (1) is provided with an internal hexagonal sleeve shaft (32). A hexagonal shaft (33) is slidably connected inside the internal hexagonal sleeve shaft (32). The opposite ends of the internal hexagonal sleeve shaft (32) and the hexagonal shaft (33) are respectively fixedly connected to the end shafts (34) located on both sides of the base plate (1). The fixing assembly includes a flip shaft (16), which is rotatably connected between the driven turntable (7) and the active turntable (11) on one side. Both ends of the flip shaft (16) are fixedly connected to pipe clamps (18) for fixing stainless steel pipes (14). Several pull arms (17) are also fixedly connected to the flip shaft (16). Tension springs (21) are installed between the ends of the pull arms (17) and the adjacent fixed connecting rods (8). An actuating arm (22) is fixedly connected in the middle of the flip shaft (16). A side plate seat (24) is fixedly connected to one side of the base plate (1) at the position corresponding to the actuating arm (22). A support frame (23) is fixedly connected to the side plate seat (24). A first electric cylinder (12) is fixedly connected to the support frame (23). Rollers (9) are rotatably connected to the output end of the first electric cylinder (12).

2. The stainless steel tube rotating mechanism according to claim 1, characterized in that, The moving component includes a sliding seat (5), which is fixedly connected to the four corners of the lower end face of the moving plate (4). T-shaped rails (3) are fixedly connected to the upper end face of the base plate (1) on both sides below the moving plate (4). The sliding seat (5) is slidably connected to the T-shaped rails (3) on both sides. A third electric cylinder (37) is fixedly connected to the upper end face of the base plate (1) at the position below the middle of the moving plate (4). The output end of the third electric cylinder (37) is fixedly connected to the lower end face of the moving plate (4) by a support.

3. The stainless steel tube rotating mechanism according to claim 1, characterized in that, The positioning component includes a vertical slide rod (27), which is fixedly connected to the middle of one side of the upper end face of the base plate (1). A sliding sleeve (28) is slidably connected to the vertical slide rod (27), and a positioning block (25) is fixedly connected to one side of the sliding sleeve (28). A second electric cylinder (26) is fixedly connected to the upper end face of the base plate (1) near the vertical slide rod (27), and the output end of the second electric cylinder (26) is fixedly connected to the positioning block (25).

4. The stainless steel tube rotating mechanism according to claim 1, characterized in that, The mounting plate (10) is provided with ball bearings on the side near the pull arm (17), and the ball bearings are distributed in a ring.

5. A welding device, comprising the stainless steel pipe rotating mechanism according to any one of claims 1-4, characterized in that, It also includes a vertical slide (38) fixedly connected to the middle of one side of the base plate (1), a lifting frame (39) slidably connected on the vertical slide (38), a fourth electric cylinder (41) is provided on one side of the vertical slide (38) to push the lifting frame (39) to move up and down, and a welding gun (40) is installed at the end of the lifting frame (39).

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