Welding equipment for seamless steel pipe

Abstract

The invention relates to the field of seamless steel pipe welding, and discloses seamless steel pipe welding equipment which comprises a fixing frame, supporting structures are arranged on the left side and the right side of the fixing frame correspondingly, a shielding welding structure is arranged in the middle of the upper face of the fixing frame, and a shielding grinding structure is arranged below the middle in the fixing frame. The two supporting structures can be automatically driven to rotate and fold through the first transmission structure, and each supporting structure can be folded in the folding process, so that the occupied space of the welding equipment is greatly reduced, the working occupied area is saved, and the welding efficiency is greatly improved when the supporting structures are rotated out for welding seamless steel pipes. And each group of supporting structures can be automatically pushed away to stably support the steel pipe, so that the operation is more labor-saving and convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seamless steel pipe welding, in particular to a welding equipment for seamless steel pipe. BACKGROUND

[0002] The seamless steel pipe is a steel pipe without welds on the surface, which is called a seamless steel pipe. According to the production method, the seamless steel pipe can be divided into hot-rolled seamless steel pipe, cold-rolled seamless steel pipe, cold-drawn seamless steel pipe, extruded seamless steel pipe, and top pipe. When connecting the seamless steel pipes, welding equipment is needed to weld the steel pipes. The welding equipment in the prior art places two steel pipes on two support seats on the base when welding the end portions of the two steel pipes. The end portions of the two steel pipes are tightly pressed on the two support seats, and then welding work is performed. However, when welding a seamless steel pipe with large size and long length, the support seat on the welding equipment needs to be correspondingly increased in size to ensure the stability of the support of the steel pipe. This results in a welding equipment with a large volume, which requires a large working space for storage. Therefore, there is room for improvement. SUMMARY

[0003] To solve the problems in the background art, the present application provides a welding equipment for seamless steel pipe.

[0004] The welding equipment for seamless steel pipe provided by the present application adopts the following technical scheme: A welding equipment for seamless steel pipe, comprising a fixed frame, the fixed frame is provided with a support structure on the left and right sides, a shielding welding structure is arranged on the middle of the upper surface of the fixed frame, and a shielding polishing structure is arranged below the middle of the fixed frame; The support structure comprises two first moving frames arranged on the left and right sides of the fixed frame, the first moving frame is arranged on the fixed frame through a rotating folding structure, two first moving frames are connected with guide rods below the two corners of the side away from each other, a guide pipe is movably sleeved on the guide rod, one end of the guide pipe is connected to a second moving frame, universal wheels are installed at the two ends of the lower surface of the first moving frame and the second moving frame, support plates are installed at the top end of the inner wall of the first moving frame and the second moving frame, the steel pipes are placed on the support plates, a tensioning structure is arranged on the top end of the second moving frame, and a pressing structure is arranged above the fixed frame. The rotating and folding structure includes a groove opened on the front of the fixed frame, and rotating columns are provided at the left and right ends of the front side of the fixed frame. Turntables are fixedly installed on the upper and lower ends of the rotating column. The turntable is rotatably arranged on the fixed frame, and connecting plates are fixedly sleeved on the upper and lower ends of the rotating column. One end of the connecting plate is connected to the first movable frame, and a first transmission structure is provided on the fixed frame.

[0005] The top end face of said sliding panel also is provided with an interlocking structure, and the interlocking structure of said sliding panel is arranged on the interlocking structure of said sliding panel and the interlocking structure of said sliding panel.

[0006] Preferably, the tensioning structure includes a transverse groove opened at the top of the front and rear side surfaces of the second movable frame, and a moving block is slidably arranged in the transverse groove, and the second movable frame is installed with a first electric telescopic rod at two corners above one side of the fixed frame. One end of the output shaft of the first electric telescopic rod is connected to the moving block, and the moving block is rotatably connected to the first rotating shaft. A turning bar is fixedly sleeved on one end of the first rotating shaft, and one end of the turning bar is fixedly connected to the end plate. Tensioning plates are provided on the two end plates through an adjusting structure, and the tensioning plates are tightened on the end of the steel pipe. A flip structure is provided between the moving block and the second movable frame.

[0007] Preferably, the adjustment structure is provided with second insertion rods at both ends of the tensioning plate, and the second insertion rods are movably inserted into the end plates. One of the second insertion rods is provided with a thread, and a thread groove is provided on the corresponding end plate. The second insertion rod with the thread is rotated to pass through the tensioning plate and a rotating block is fixed on one end.

[0008] Preferably, the flipping structure includes a first gear fixedly mounted on the middle of the first rotating shaft, the moving block movably passes through a driving frame, the driving frame is provided with teeth meshing with the first gear, a third insertion rod is fixedly passed through the bottom end of the driving frame, and second driving grooves are provided above the front and rear side surfaces of the second moving frame, and one end of the third insertion rod is movably inserted into the second driving groove.

[0009] Preferably, the clamping structure includes two groups of fixing seats installed above the left and right sides of the inner wall of the fixing frame, each of the fixing seats is provided with a first arc groove, and the first arc grooves of the two fixing seats in each group are movable through a rotating ring, and a plurality of second electric telescopic rods distributed at equal angles in a circle are installed on the inner wall of the rotating ring, a clamping plate is installed at one end of the output shaft of the second electric telescopic rod, and a driving structure is provided between the rotating ring and the fixing frame.

[0010] Preferably, the driving structure includes a first motor installed at a rear position on the fixed frame, a third gear is fixedly mounted on the output shaft of the first motor, two first fixed blocks are arranged above the inner wall of the rear side of the fixed frame near the position of the first motor, a cross bar is rotated through the two first fixed blocks, a second gear is fixedly mounted on both ends of the cross bar near the two rotating rings, a gear ring is fixedly mounted in the middle of the outer side surface of the rotating ring, a second arc groove is provided on the fixed seat for the gear ring to move through, the second gear is meshed with the teeth on the gear ring, a fifth gear is fixedly mounted in the middle of the cross bar, and the fifth gear is meshed with the third gear.

[0011] Preferably, the shielding welding structure includes a U-shaped frame fastened to the middle of the fixing frame by bolts, a second cylinder is installed in the middle of the U-shaped frame, the output shaft of the second cylinder passes through the bottom end of the U-shaped frame and an upper shielding cover is installed, and a welding machine is installed in the middle of the upper inner wall of the upper shielding cover.

[0012] Preferably, the shielding and grinding structure includes a lower shielding cover arranged in the middle and lower part of the fixed frame, a second motor is installed on one side of the lower shielding cover, the output shaft of the second motor is rotated and inserted into the upper fixed sleeve of the grinding wheel in the inner part of the lower shielding cover, and a second transmission structure is arranged between the lower shielding cover and the upper shielding cover.

[0013] The second gear is fixedly mounted on the cam frame, and the rear frame is provided with a second gear connected to the cam frame by a third gear connected to the cam frame by a third gear connected to the cam frame.

[0014] In summary, the present invention has the following beneficial technical effects: The present invention is provided with a support structure, a rotating and folding structure, and a first transmission structure. The first transmission structure can automatically drive the two groups of support structures to rotate and fold. During the folding process, each group of support structures can also be folded, which greatly reduces the occupied space of the welding equipment and saves work area. When the support structure is rotated out to weld the seamless steel pipe, each group of support structures can be automatically pushed away to stably support the steel pipe, making the operation more labor-saving and convenient. The present invention is provided with a tensioning structure, an adjustment structure and a flipping structure. The tensioning structure and the flipping structure can drive the tensioning plate to rotate and press against the end of the steel pipe, so that the ends of the two steel pipes to be welded can be pressed together to improve the welding quality. In addition, when the tensioning plate moves in the reverse direction, it can automatically flip to a vertical downward rotation to avoid the tensioning plate interfering with the loading and unloading of the steel pipe. The present invention provides a tightening structure and a driving structure. The tightening structure is used to tighten the steel pipe near the welding end of the steel pipe to prevent position deviation during the welding process of the steel pipe, thereby improving the quality of welding. In addition, the driving structure can automatically drive the steel pipe to rotate during the welding process, thereby performing welding work at various positions of the steel pipe end, thereby improving work efficiency. The present invention provides a shielding welding structure, a shielding grinding structure and a second transmission structure. The shielding welding structure and the shielding grinding structure can be used to shield the debris generated during the welding process, and can also automatically grind the welded steel pipe to improve the work quality. Through the second transmission structure, the shielding welding structure and the shielding grinding structure can be synchronously driven to automatically move in opposite directions to perform shielding, welding and grinding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 1 is a schematic structural diagram of a welding device for seamless steel pipes according to an embodiment of the present invention; Figure 2 is a structural schematic diagram of a fixing frame in an embodiment of the present invention; Figure 3 In the embodiment of the present invention Figure 2 A magnified view of the structure at point A; Figure 4 In the embodiment of the present invention Figure 2 A magnified view of the structure at point B; Figure 5 In the embodiment of the present invention Figure 2 A magnified view of the structure at point C; Figure 6 is a structural schematic diagram of a support structure in an embodiment of the present invention; Figure 7 In the embodiment of the present invention Figure 6 A magnified view of the structure at D; Figure 8 is a schematic structural diagram of the rear side of the fixing frame in an embodiment of the present invention; Figure 9 In the embodiment of the present invention Figure 8 Enlarged view of the structure at E.

[0016] Explanation of the accompanying symbols: 1. fixed frame; 2. first movable frame; 3. support plate; 4. second movable frame; 5. guide rod; 6. guide tube; 7. first through groove; 8. push-pull plate; 9. first cylinder; 10. first lifting plate; 11. second through groove; 12. groove; 13. universal wheel; 14. lifting sleeve; 15. rotating sleeve; 16. rotating column; 17. first plug rod; 18. first vertical groove; 19. first driving groove; 20. connecting plate; 21. turntable; 22. horizontal groove; 23. moving block; 24. first electric telescopic rod; 25. first rotating shaft; 26. rotating bar; 27. end plate; 28. tensioning plate; 29. ​​second plug rod; 30. rotating block; 31. first gear; 32. driving frame; 33. Second driving groove; 34. fixed seat; 35. rotating ring; 36. second electric telescopic rod; 37. holding plate; 38. first arc groove; 39. gear ring; 40. second arc groove; 41. first fixed block; 42. cross bar; 43. second gear; 44. first motor; 45. third gear; 46. U-shaped frame; 47. second cylinder; 48. upper shielding cover; 49. lower shielding cover; 50. second motor; 51. grinding wheel; 52. second vertical groove; 53. second lifting plate; 54. vertical rod; 55. first transmission plate; 56. second fixed block; 57. second rotating shaft; 58. fourth gear; 59. second transmission plate; 60. third vertical groove; 61. fifth gear; 62. third insertion rod. DETAILED DESCRIPTION

[0017] The following is combined with Figures 1-9 The present invention is described in further detail.

[0018] Reference Figures 1-9 The embodiment of the present invention discloses a welding device for seamless steel pipes, comprising a fixing frame 1, wherein support structures are provided on both sides of the fixing frame 1, a shielding welding structure is provided in the middle of the upper portion of the fixing frame 1, and a shielding grinding structure is provided in the lower middle portion of the fixing frame 1; The supporting structure includes two first mobile frames 2 arranged on the left and right sides of the fixed frame 1, the first mobile frames 2 are arranged on the fixed frame 1 through a rotating folding structure, and the two first mobile frames 2 are connected to the guide rod 5 at the two corners below one side away from each other, and a guide tube 6 is movably sleeved on the guide rod 5, and one end of the guide tube 6 is connected to the second mobile frame 4. Universal wheels 13 are installed at both ends of the lower sides of the first mobile frame 2 and the second mobile frame 4, and support plates 3 are installed at the top of the inner walls of the first mobile frame 2 and the second mobile frame 4. Steel pipes are placed on the support plates 3, a tensioning structure is provided at the top of the second mobile frame 4, and a tightening structure is provided at the upper inner portion of the fixed frame 1; The rotating and folding structure includes a groove 12 formed on the front surface of the fixed frame 1, a rotating column 16 is provided at both the left and right ends of the front side of the fixed frame 1, a turntable 21 is fixedly installed on the upper and lower ends of the rotating column 16, and the turntable 21 is rotatably provided on the fixed frame 1, and a connecting plate 20 is fixedly sleeved on the upper and lower ends of the rotating column 16, one end of the connecting plate 20 is connected to the first movable frame 2, and a first transmission structure is provided on the fixed frame 1; The first transmission structure includes a groove 12 opened on the front of the fixed frame 1, a first cylinder 9 is installed in the middle of the groove wall of the groove 12, the bottom end of the output shaft of the first cylinder 9 is connected to the first lifting plate 10, and a second through slot 11 for the first lifting plate 10 to movably pass through is opened on the groove walls on the left and right sides of the groove 12. A lifting sleeve 14 is fixedly installed at both ends of the first lifting plate 10, and the lifting sleeve 14 is movably sleeved on the rotating column 16, and a first vertical slot 18 is opened at the upper and lower sections of the rotating column 16. A first driving slot 19 connected to the top of the first vertical slot 18 is opened on the rotating column 16, and the first plug rod 17 is fixedly inserted into the top of the rotating column 16. One end of the first plug rod 17 is slidably set in the first vertical slot 18, and a rotating sleeve 15 is rotatably sleeved on the lifting sleeve 14. The rotating sleeve 15 is rotatably connected to the push-pull plate 8, and the first movable frame 2 is provided with a first through slot 7 for the push-pull plate 8 to pass through. One end of the push-pull plate 8 is rotatably connected to the guide pipe 6. When the equipment is stored, the first cylinder 9 can be started to drive the first lifting plate 10 to move up in the groove 12, and the first lifting plate 10 drives one end of the first plug rod 17 on the lifting sleeve 14 to slide in the first vertical groove 18 on the rotating column 16. When one end of the first plug rod 17 slides into the first driving groove 19, the first plug rod 17 is used to squeeze the groove wall of the first driving groove 19 to push the rotating column 16 to rotate, and the two sets of first mobile frames 2 and second mobile frames 4 can be rotated and folded to the front side of the fixed frame 1 by the rolling of the universal wheel 13 to reduce the occupied space of the equipment, and when the rotating column 16 rotates, one end of the push-pull plate 8 is driven to move up through the rotating sleeve 15, thereby pulling the second mobile frame 4 to move at the first mobile frame 2, closing the first mobile frame 2 and the second mobile frame 4, thereby further reducing the occupied space of the equipment, facilitating storage, and reducing the occupation of the working space.

[0019] See also Figure 1 、 Figure 6 and Figure 7 , the tensioning structure includes a transverse groove 22 opened at the top of the front and rear side surfaces of the second mobile frame 4, a moving block 23 is slidably set in the transverse groove 22, and the second mobile frame 4 is installed with a first electric telescopic rod 24 at the two corners above the side surface close to the fixed frame 1. One end of the output shaft of the first electric telescopic rod 24 is connected to the moving block 23, and the moving block 23 is rotatably connected to the first rotating shaft 25. A rotating bar 26 is fixedly sleeved on one end of the first rotating shaft 25, and one end of the rotating bar 26 is fixedly connected to the end plate 27. A tensioning plate 28 is provided on the two end plates 27 through an adjusting structure. The tensioning plate 28 is tightened on the end of the steel pipe, and a flip structure is provided between the moving block 23 and the second mobile frame 4; The adjustment structure is provided with second rods 29 at both ends of the tensioning plate 28. The second rods 29 are movably inserted into the end plates 27. One of the second rods 29 is provided with a thread, and a corresponding thread groove is provided on the end plate 27. The threaded second rod 29 is rotated to pass through the tensioning plate 28, and a rotating block 30 is fixedly sleeved on one end. When the threaded second rod 29 is rotated by using the rotating block 30, the position of the tensioning plate 28 can be adjusted on the end plate 27 according to the actual length of the steel pipe. The flip structure includes a first gear 31 fixedly sleeved on the middle part of the first rotating shaft 25, and the moving block 23 movably passes through the driving frame 32. The driving frame 32 is provided with teeth meshing with the first gear 31. The bottom end of the driving frame 32 is fixedly passed through the third plug rod 62. A second driving groove 33 is provided above the front and rear sides of the second moving frame 4. One end of the third plug rod 62 is movably inserted into the second driving groove 33. Before welding, the first electric telescopic rod 24 can be started to drive the moving block 23 to move in the transverse groove 22 toward the side close to the fixed frame 1, driving the bottom end of the third plug rod 62 at the bottom of the driving frame 32 to slide in the second driving groove 33. The groove wall of the groove 33 corresponds to the upward movement of the driving frame 32, and the first rotating shaft 25 and the rotating bar 26 are driven to rotate to a horizontal state through the first gear 31, thereby rotating the tensioning plate 28. In this way, as the moving block 23 continues to move, the tensioning plate 28 can be driven to move to the end of the steel pipe away from the welding, thereby pushing the two steel pipes to be pressed against each other, avoiding the problem of position displacement of the steel pipes in the horizontal direction, thereby ensuring the welding quality. After welding, the first electric telescopic rod 24 drives the moving block 23 to move in the opposite direction and reset, and drives the rotating bar 26 to flip to a vertical downward state, thereby rotating the tensioning plate 28 to avoid the tensioning plate 28 interfering with the loading and unloading work of the steel pipe.

[0020] See also Figure 1-Figure 3The abutting structure includes two sets of fixing seats 34 installed on the upper left and right sides of the inner wall of the fixing frame 1. Each fixing seat 34 is provided with a first arcuate groove 38. The first arcuate groove 38 of each set of two fixing seats 34 is movable through the rotating ring 35. The inner wall of the rotating ring 35 is installed with a plurality of second electric telescopic rods 36 distributed at equal angles around the circumference. A clamping plate 37 is installed at one end of the output shaft of the second electric telescopic rod 36. A driving structure is provided between the rotating ring 35 and the fixing frame 1. The driving structure includes a first motor 44 installed at the rear position of the fixing frame 1, and a third gear 45 is fixedly sleeved on the output shaft of the first motor 44. Two first fixing blocks 41 are provided on the upper inner wall of the rear side of the fixing frame 1 near the position of the first motor 44. The two first fixing blocks 41 rotate through the cross bar 42. The second gear 43 is fixedly sleeved on both ends of the cross bar 42 near the two rotating rings 35. A gear ring 39 is fixedly sleeved in the middle of the outer side of the rotating ring 35. A second arc groove 40 is provided on the fixing seat 34 for the gear ring 39 to move through. The second gear 43 is meshed with the teeth on the gear ring 39. The fifth gear 61 is fixedly mounted and meshed with the third gear 45. When one end of the steel pipe is pressed against each other, the second electric telescopic rod 36 on the rotating ring 35 is started to drive the clamping plate 37 to move and press against the steel pipe, thereby pressing and fixing the steel pipe to prevent the steel pipe from rolling along the front and rear directions of the fixed frame 1 and reducing the welding quality. During welding, the first motor 44 can be started again to drive the cross bar 42 to rotate through the third gear 45 and the fifth gear 61, and drive the rotating ring 35 and the clamped steel pipe to rotate through the second gear 43 and the gear ring 39, so that welding work can be performed on various positions of the steel pipe end.

[0021] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 8 and Figure 9 The shielding welding structure includes a U-shaped frame 46 fastened to the middle of the upper part of the fixing frame 1 by bolts, a second cylinder 47 is installed in the middle of the upper part of the U-shaped frame 46, the output shaft of the second cylinder 47 passes through the bottom end of the U-shaped frame 46 and is installed on the shielding cover 48, and a welding machine is installed in the middle of the upper inner wall of the upper shielding cover 48; The shielding and grinding structure includes a lower shielding cover 49 provided at the lower middle portion of the fixed frame 1, a second motor 50 is mounted on one side of the lower shielding cover 49, the output shaft of the second motor 50 rotates and is inserted into the inner portion of the lower shielding cover 49 to securely sleeve a grinding wheel 51, and a second transmission structure is provided between the lower shielding cover 49 and the upper shielding cover 48; The second transmission structure includes a second lifting plate 53 connected to the lower part of the front and rear side surfaces of the lower shielding cover 49, and the second lifting plate 53 is inserted into the second vertical slot 52 provided at the lower part of the inner wall of the front and rear sides of the fixing frame 1. The vertical rod 54 is connected between the upper and lower groove walls of the second vertical slot 52, and the second lifting plate 53 is movably sleeved on the vertical rod 54. The second lifting plate 53 on the rear side passes through the fixing frame 1 and is connected to the first transmission plate 55. Two second fixed blocks 56 are provided near the middle of the rear side of the fixing frame 1. The two second fixed blocks 56 rotate through the second rotating shaft 57. The fourth gear 58 is fixedly sleeved in the middle of the second rotating shaft 57. A second transmission plate 59 is provided near the fourth gear 58 on the rear side of the fixing frame 1. The first transmission plate 55 and the second transmission plate 59 are distributed on the front and rear sides of the fourth gear 58. The first transmission plate 55 and the second transmission plate 59 are provided with teeth meshing with the fourth gear 58, and the second transmission plate 59 is in an "L" shape. The second transmission plate 59 is connected to the upper shielding cover 48 at one end, and the second transmission plate 59 passes through the third vertical slot 60 provided on the U-shaped frame 46. When welding, the second cylinder 47 on the U-shaped frame 46 is started to drive the upper shielding cover 48 to move downward. At the same time, the second transmission plate 59 is driven to move now, and the first transmission plate 55 is driven to move upward through the fourth gear 58 and the second rotating shaft 57, and the lower shielding cover 49 is pulled upward. When the upper shielding cover 48 and the lower shielding cover 49 are moved and closed on the steel pipe, the welding machine can be started to weld the steel pipe. During the rotating welding process of the steel pipe, the second motor 50 can be started again to drive the grinding wheel 51 to rotate, and the rotating grinding wheel 51 is used to automatically grind the steel pipe welding position, so as to improve the aesthetics of the steel pipe after welding. The closed upper shielding cover 48 and the lower shielding cover 49 can also block and collect the debris generated during welding and grinding, thereby improving the quality of the working environment and facilitating centralized processing.

[0022] The implementation principle of a welding device for seamless steel pipes in an embodiment of the present invention is as follows: first, the two pipes to be welded are placed on the support plates 3 in the two groups of first movable frames 2 and second movable frames 4 respectively; then, the first electric telescopic rod 24 is started to drive the moving block 23 to move in the transverse groove 22 toward the side close to the fixed frame 1, driving the bottom end of the third insertion rod 62 at the bottom end of the driving frame 32 to slide in the second driving groove 33; the groove wall of the second driving groove 33 corresponds to the upward movement of the driving frame 32, and the first rotating shaft 25 and the rotating bar 26 are driven to rotate to a horizontal state through the first gear 31, thereby rotating the tensioning plate 28; as the moving block 23 continues to move, the tensioning plate 28 can be driven to move to the end of the steel pipe away from the welding end, thereby pushing the two steel pipes to be pressed against each other until they are tight. Then, the second electric telescopic rod 36 on the rotating ring 35 is started to drive the clamping plate 37 to move and clamp to the steel pipe, and fix the steel pipe to prevent the steel pipe from rolling along the width direction of the fixed frame 1. Then, the second cylinder 47 on the U-shaped frame 46 is started to drive the upper shielding cover 48 to move downward. At the same time, the second transmission plate 59 is driven to move, and the first transmission plate 55 is driven to move upward through the fourth gear 58 and the second rotating shaft 57, and the lower shielding cover 49 is pulled upward. When the upper shielding cover 48 and the lower shielding cover 49 move and close to the steel pipe, the welding machine can be started to weld the steel pipe, and the first motor 44 is started to drive the cross bar 42 to rotate through the third gear 45 and the fifth gear 61. The second gear 43 and the gear ring 39 drive the rotating ring 35 and the clamped steel pipe to rotate, so as to weld various positions on the steel pipe. During the welding process, the second motor 50 can also be started to drive the grinding wheel 51 to rotate, and the rotating grinding wheel 51 is used to automatically grind the welding part of the steel pipe to improve the aesthetics of the steel pipe after welding. At the same time, the closed upper shielding cover 48 and the lower shielding cover 49 can also block and collect the debris generated during welding and grinding, improve the quality of the working environment, and facilitate centralized processing. After welding, the first electric telescopic rod 24 is started to drive the moving block 23 to move in the opposite direction and reset, and drive the turning bar 26 to flip to a vertical downward state, thereby turning the tensioning plate 28, and finally removing the welded steel pipe. When the equipment is stored, the first gas The cylinder 9 drives the first lifting plate 10 to move up in the groove 12, and the first lifting plate 10 drives one end of the first plug rod 17 on the lifting sleeve 14 to slide in the first vertical groove 18 on the rotating column 16. When one end of the first plug rod 17 slides into the first driving groove 19, the first plug rod 17 is used to squeeze the groove wall of the first driving groove 19 to push the rotating column 16 to rotate, and the two groups of first mobile frames 2 and second mobile frames 4 can be rotated and folded to the front side of the fixed frame 1 by the rolling of the universal wheel 13 to reduce the occupied space of the equipment, and when the rotating column 16 rotates, it drives one end of the push-pull plate 8 to move up through the rotating sleeve 15, thereby pulling the second mobile frame 4 to move at the first mobile frame 2, and closing the first mobile frame 2 and the second mobile frame 4.This further reduces the space occupied by the device, makes storage more convenient, reduces the occupation of work space, and has a simple structure and practical functions.

[0023] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A welding device for seamless steel pipes, comprising a fixing frame (1), characterized in that: Support structures are provided on both the left and right sides of the fixing frame (1), a shielding welding structure is provided in the middle of the upper portion of the fixing frame (1), and a shielding grinding structure is provided in the lower middle portion of the inner portion of the fixing frame (1); The support structure comprises two first movable frames (2) arranged on the left and right sides of the fixed frame (1), the first movable frames (2) being arranged on the fixed frame (1) through a rotating folding structure, the two first movable frames (2) being connected to guide rods (5) at two corners below a side away from each other, a guide tube (6) being movably sleeved on the guide rod (5), one end of the guide tube (6) being connected to the second movable frame (4), universal wheels (13) being installed at both ends below the first movable frame (2) and the second movable frame (4), support plates (3) being installed at the top of the inner walls of the first movable frame (2) and the second movable frame (4), steel pipes being placed on the support plates (3), a tensioning structure being arranged at the top of the second movable frame (4), and a tightening structure being arranged at the upper inner portion of the fixed frame (1); The rotating folding structure comprises a groove (12) provided on the front face of the fixed frame (1), a rotating column (16) is provided at both left and right ends of the front side of the fixed frame (1), a turntable (21) is fixedly mounted on both upper and lower ends of the rotating column (16), the turntable (21) is rotatably provided on the fixed frame (1), a connecting plate (20) is fixedly sleeved on both upper and lower ends of the rotating column (16), one end of the connecting plate (20) is connected to the first movable frame (2), and a first transmission structure is provided on the fixed frame (1).

2. The welding equipment for seamless steel pipes according to claim 1, characterized in that: The first transmission structure comprises a groove (12) provided on the front of the fixed frame (1), a first cylinder (9) is installed in the middle of the upper groove wall of the groove (12), the bottom end of the output shaft of the first cylinder (9) is connected to the first lifting plate (10), and second through grooves (11) for the first lifting plate (10) to move through are provided on the groove walls on the left and right sides of the groove (12), and lifting sleeves (14) are fixedly installed at both ends of the first lifting plate (10), and the lifting sleeves (14) are movably sleeved on the rotating column (16), and the rotating column (16) is provided with first vertical guides at the upper and lower sections. The first vertical slot (18) is connected to the top of the first vertical slot (18) by a first driving slot (19) provided on the rotating column (16). The top of the rotating column (16) is fixedly inserted into the first insertion rod (17). One end of the first insertion rod (17) is slidably arranged in the first vertical slot (18). A rotating sleeve (15) is provided on the lifting sleeve (14). The rotating sleeve (15) is rotatably connected to the push-pull plate (8). The first movable frame (2) is provided with a first through slot (7) for the push-pull plate (8) to pass through. One end of the push-pull plate (8) is rotatably connected to the guide tube (6).

3. The welding equipment for seamless steel pipes according to claim 1, characterized in that: The tensioning structure includes a transverse groove (22) provided at the top of the front and rear sides of the second movable frame (4), a movable block (23) is slidably arranged in the transverse groove (22), and the second movable frame (4) is provided with a first electric telescopic rod (24) at two corners above one side close to the fixed frame (1), one end of the output shaft of the first electric telescopic rod (24) is connected to the movable block (23), and the movable block (23) is rotatably connected to the first rotating shaft (25), one end of the first rotating shaft (25) is fixedly sleeved with a rotating bar (26), and one end of the rotating bar (26) is fixedly connected to the end plate (27), and a tensioning plate (28) is provided on the two end plates (27) through an adjustment structure, and the tensioning plate (28) is tightened on the end of the steel pipe, and a flip structure is provided between the movable block (23) and the second movable frame (4).

4. The welding equipment for seamless steel pipes according to claim 3, characterized in that: The adjustment structure is provided with second insertion rods (29) at both ends of the tensioning plate (28), and the second insertion rods (29) are movably inserted into the end plates (27). One of the second insertion rods (29) is provided with a thread, and a thread groove is provided on the corresponding end plate (27). The second insertion rod (29) provided with the thread is rotated to pass through the tensioning plate (28) and a rotating block (30) is fixedly sleeved on one end.

5. The welding equipment for seamless steel pipes according to claim 3, characterized in that: The flip structure includes a first gear (31) fixedly sleeved on the middle of the first rotating shaft (25), the moving block (23) movably passes through a driving frame (32), the driving frame (32) is provided with teeth meshing with the first gear (31), the bottom end of the driving frame (32) is fixedly passed through a third insertion rod (62), and the second moving frame (4) is provided with a second driving groove (33) at the upper part of the front and rear sides, and one end of the third insertion rod (62) is movably inserted into the second driving groove (33).

6. The welding equipment for seamless steel pipes according to claim 1, characterized in that: The clamping structure comprises two groups of fixing seats (34) mounted on the upper left and right sides of the inner wall of the fixing frame (1), each of the fixing seats (34) is provided with a first arcuate groove (38), and a rotating ring (35) is movable through the first arcuate groove (38) of each group of two fixing seats (34), and a plurality of second electric telescopic rods (36) distributed at equal angles on a circumference are mounted on the inner wall of the rotating ring (35), and a clamping plate (37) is mounted on one end of the output shaft of the second electric telescopic rod (36), and a driving structure is provided between the rotating ring (35) and the fixing frame (1).

7. The welding equipment for seamless steel pipes according to claim 6, characterized in that: The driving structure comprises a first motor (44) mounted on the rear side of the fixing frame (1); a third gear (45) is fixedly sleeved on the output shaft of the first motor (44); two first fixing blocks (41) are arranged on the upper inner wall of the rear side of the fixing frame (1) near the position of the first motor (44); the two first fixing blocks (41) rotate through a cross bar (42); a second gear (43) is fixedly sleeved on both ends of the cross bar (42) near the two rotating rings (35); a gear ring (39) is fixedly sleeved in the middle of the outer side of the rotating ring (35); a second arc-shaped groove (40) is provided on the fixing seat (34) for the gear ring (39) to move through; the second gear (43) is meshed with the teeth on the gear ring (39); a fifth gear (61) is fixedly sleeved in the middle of the cross bar (42); the fifth gear (61) is meshed with the third gear (45).

8. The welding equipment for seamless steel pipes according to claim 1, characterized in that: The shielding welding structure comprises a U-shaped frame (46) fastened to the middle of the upper portion of the fixing frame (1) by bolts, a second cylinder (47) is installed in the middle of the upper portion of the U-shaped frame (46), an output shaft of the second cylinder (47) passes through the bottom end of the U-shaped frame (46) and an upper shielding cover (48) is installed, and a welding machine is installed in the middle of the upper inner wall of the upper shielding cover (48).

9. The welding equipment for seamless steel pipes according to claim 1, characterized in that: The shielding and grinding structure comprises a lower shielding cover (49) arranged at the lower middle part of the fixing frame (1); a second motor (50) is installed on one side of the lower shielding cover (49); an output shaft of the second motor (50) is rotated and inserted into the inner part of the lower shielding cover (49) to fix a grinding wheel (51) on the upper sleeve; and a second transmission structure is provided between the lower shielding cover (49) and the upper shielding cover (48).

10. The welding equipment for seamless steel pipes according to claim 9, characterized in that: The second transmission structure includes a second lifting plate (53) connected to the lower part of the front and rear side surfaces of the lower shielding cover (49), the second lifting plate (53) is inserted into a second vertical slot (52) provided at the lower part of the inner wall of the front and rear sides of the fixing frame (1), the vertical rod (54) is connected between the upper and lower groove walls of the second vertical slot (52), the second lifting plate (53) is movably sleeved on the vertical rod (54), and the rear side of the second lifting plate (53) passes through the fixing frame (1) and is connected to the first transmission plate (55), and two second fixing blocks (56) are provided near the middle of the rear side surface of the fixing frame (1), and the two second fixing blocks (56) rotate through the second rotating shaft ( 57), a fourth gear (58) is fixedly sleeved on the middle of the second rotating shaft (57), a second transmission plate (59) is provided on the rear side of the fixed frame (1) near the fourth gear (58), the first transmission plate (55) and the second transmission plate (59) are distributed at the front and rear sides of the fourth gear (58), the first transmission plate (55) and the second transmission plate (59) are provided with teeth meshing with the fourth gear (58), the second transmission plate (59) is in an "L" shape, one end of the second transmission plate (59) is connected to the upper shielding cover (48), and the second transmission plate (59) passes through the third vertical slot (60) provided on the U-shaped frame (46).

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