Large-diameter pipeline flange weld joint quality monitoring system
The driven rod is driven to perform circular motion through the meshing of the sun gear and the planetary gear. Combined with the telescopic structure and the hydraulic rod, simultaneous monitoring of the inner and outer surfaces of the large-diameter pipeline flange weld is achieved, solving the complexity and inconsistency of step-by-step monitoring in the existing technology, and improving the comprehensiveness and efficiency of monitoring.
Patent Information
- Application Number
- CN202510304732.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2025-07-29
AI Technical Summary
The existing large-diameter pipeline flange weld quality monitoring system requires internal and external surface monitoring in steps, which increases time cost, labor cost and operational complexity, and may lead to inconsistent monitoring results.
A large-diameter pipeline flange weld quality monitoring system is designed. The driven rod is driven to perform circular motion through meshing of sun gears and planetary gears. Combined with telescopic structures and hydraulic rods, simultaneous monitoring of the welds on the inner and outer surfaces of the flange are achieved, and the quality evaluation is used is performed using an ultrasonic detection head, and air blowing and cleaning structures are equipped to remove weld impurities.
It realizes simultaneous monitoring of the welds on the inner and outer surfaces of the flange, improves the comprehensiveness and efficiency of monitoring, reduces operational complexity and labor costs, and ensures the consistency and accuracy of monitoring results.
Smart Images
Figure CN120385741A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of large-diameter pipeline flange weld quality monitoring, and specifically to a large-diameter pipeline flange weld quality monitoring system. Background Art
[0002] With the continuous development of pipeline engineering technology and the improvement of safety standards, the requirements for weld quality monitoring devices are also getting higher and higher. Large-diameter pipelines are widely used in fields such as underground drainage and natural gas transportation. Among them, the quality of pipeline welding has a great impact on the laid pipeline system. Therefore, relevant staff have studied various large-diameter pipeline welding processes in order to ensure the pipeline welding quality. However, in actual operation, due to the influence of welders' experience, actual working environment, etc., problems still exist at the pipeline welding joints.
[0003] In the process of using the existing large-diameter pipeline flange weld quality monitoring system by operators, it is necessary to first monitor the outer surface weld of the flange, and then monitor the inner side weld of the flange. It has singularity. Dividing the monitoring into two steps requires additional time and labor costs, increasing the overall cost and cycle of monitoring. Step-by-step monitoring requires operators to perform two monitors, increasing the complexity of operation and skill requirements, and may increase the risk of operation errors. There may be differences in the two monitoring results, resulting in inconsistencies when evaluating the weld quality. Summary of the Invention
[0004] In order to solve the above problems, the purpose of the invention is to provide a large-diameter pipeline flange weld quality monitoring system, including a workbench. A flange is placed at the center of the top surface of the workbench. A frame is provided at one end of the workbench. A cylinder is provided at one end of the frame. A circumferential motion structure is provided at one end of the cylinder. A monitoring structure is provided at one end of the circumferential motion structure. A ring is provided on one side of the circumferential motion structure. A telescopic structure is provided on one side of the ring. A second ultrasonic detection head is provided on one side of the telescopic structure; The circumferential motion structure includes a fixed shell provided at the output end of the cylinder, a motor provided inside the fixed shell, a driving rod provided at the output end of the motor, a sun gear provided on the surface of the driving rod, a planetary gear meshing at one end of the sun gear, a tooth ring meshing at the other end of the planetary gear, and a driven rod provided on one side of the planetary gear. The driving rod is connected to the inner side of the ring; The monitoring structure includes a ring provided at one end of the driven rod, an inclined rod provided at one end of the ring, and a first ultrasonic detection head provided at one end of the inclined rod; The telescopic structure includes a rod groove opened on the surface of the circular ring. A rotating rod is movably connected inside the rod groove. A main gear is arranged on the surface of the rotating rod. One end of the main gear meshes with a rack. One end of the rack is provided with a hydraulic rod. The bottom end of the hydraulic rod is provided with a support plate. One end of the support plate is connected to the bottom end of the circular ring. One end of the rotating rod is provided with a ball screw. A sleeve is threadedly connected to the surface of the ball screw. The sleeve is connected to the ultrasonic detector II.
[0005] Preferably, the toothed ring is connected to the inner wall of the fixed shell. An annular groove is opened on the bottom surface of the fixed shell. The driven rod moves in the annular groove.
[0006] Preferably, one end of the rotating rod is provided with a ball screw. A long groove is opened inside the circular ring. A long plate slides inside the long groove. The long plate is connected to the rack.
[0007] Preferably, an air blowing mechanism is arranged at the bottom end of the fixed shell. The air blowing mechanism includes an air pump arranged at the bottom end of the fixed shell. One end of the air pump is connected to a first air pipe and a second air pipe. One end of the first air pipe and the second air pipe are respectively connected to a first blowing head and a second blowing head. The first air pipe and the second air pipe are made of flexible hose material. The first blowing head and the second blowing head are inclined. The first blowing head and the second blowing head respectively blow off the impurities and dust at the welds on the outer and inner surfaces of the flange.
[0008] Preferably, an inner side cleaning structure is arranged on one side of the sleeve. The inner side cleaning structure includes a side ring arranged on the surface of the sleeve. One end of the side ring is provided with an extension rod. One end of the extension rod is provided with a first cleaning block. The first cleaning block cleans the dust and impurities at the weld on the inner surface of the flange.
[0009] Preferably, an outer side cleaning structure is arranged on one side of the ring. The outer side cleaning structure includes a linkage rod arranged on one side of the ring. One side of the linkage rod is provided with a second cleaning block. The second cleaning block is in the shape of a triangular prism. The second cleaning block cleans the dust and impurities at the weld on the outer surface of the flange.
[0010] Preferably, a collar is sleeved on the surface of the first air pipe. The collar is connected to a connecting rod. The connecting rod is connected to the linkage rod. A fixing ring is sleeved on the surface of the second air pipe. The fixing ring is connected to a fixing rod. The fixing rod is connected to the side ring.
[0011] Preferably, one end of the driving rod is provided with a fixing structure. The fixing structure includes a turntable arranged on the surface of the driving rod. A channel is opened on the surface of the turntable. Four groups of channels are arranged at equal intervals. The four groups of channels are arc-shaped. A slider slides in each of the four groups of channels. The bottom end of the driving rod is connected to a circular plate by a bearing. A circular shell is arranged outside the circular plate. A connecting plate is arranged on the surface of the circular plate. Four groups of connecting plates are arranged at equal intervals. A chute is opened on each of the four groups of connecting plates. A sliding rod slides in each of the chutes. The sliding rod is connected to the slider. An arc plate is arranged at one end of the sliding rod. A notch is opened on the surface of the circular shell. The arc plate corresponds to the notch in position.
[0012] Preferably, a clamping groove is opened on the top surface of the workbench. A clamping block is arranged at the bottom end of the circular shell. The clamping block corresponds to the clamping groove in position.
[0013] Preferably, the driving rod is connected to the fixed shell by a bearing. The circular ring is flush with the position of the weld at the inner surface of the flange.
[0014] By adopting the above technical scheme, the sun gear and the planetary gear are meshed, and the driven rod makes a circular motion around the sun gear to monitor the weld on the outer surface of the flange. There is a telescopic structure to move the ultrasonic detector II to the weld on the inner surface of the flange for monitoring, realizing the simultaneous monitoring of the welds on the inner and outer surfaces of the flange, and improving the comprehensiveness and efficiency of the monitoring.
[0015] The beneficial effects of the present invention are as follows: 1. In the present invention, the flange is placed on the workbench, and the cylinder on the frame is started to drive the fixed shell to move to a suitable position. Then, the motor is started to drive the sun gear on the surface of the driving rod to mesh with the planetary gear, thereby driving the driven rod to make a circular motion around the sun gear to monitor the weld on the outer surface of the flange.
[0016] 2. In the present invention, a telescopic structure is arranged on one side of the circular ring to move the ultrasonic detector II to the weld on the inner surface of the flange for monitoring. The hydraulic rod is started to drive the rack and the main gear, and finally the ultrasonic detector II is moved to the weld to start the monitoring work, thereby realizing the simultaneous monitoring work of the welds on the inner and outer surfaces of the flange and improving the comprehensiveness and efficiency of the monitoring. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is the overall three-dimensional structure schematic diagram of the present invention; Figure 2 is the three-dimensional structure schematic diagram of the circular motion structure, flange, workbench, monitoring structure, telescopic structure, air blowing mechanism, inner cleaning structure, outer cleaning structure, and fixing structure of the present invention; Figure 3 is the three-dimensional structure schematic diagram of the circular motion structure of the present invention; Figure 4It is a three-dimensional upward view structural schematic diagram of the circular motion structure of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the telescopic structure and the ring of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the air blowing mechanism of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the telescopic structure, the air blowing mechanism, the ultrasonic detection head two and the inner cleaning structure of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the monitoring structure, the air blowing mechanism, the connecting rod and the outer cleaning structure of the present invention; Figure 9 It is a three-dimensional structural schematic diagram of the workbench, the clamping block, the clamping groove and the fixing structure of the present invention; Figure 10 It is a three-dimensional unfolded structural schematic diagram of the fixing structure of the present invention.
[0018] Wherein: 1. Workbench; 2. Frame; 3. Cylinder; 4. Circular motion structure; 41. Fixed shell; 42. Motor; 43. Driving rod; 44. Sun gear; 45. Planet gear; 46. Ring gear; 47. Driven rod; 48. Annular groove; 5. Flange; 6. Monitoring structure; 61. Ring; 62. Inclined rod; 63. Ultrasonic detection head one; 7. Telescopic structure; 71. Support plate; 72. Hydraulic rod; 73. Rack; 74. Main gear; 75. Rotating rod; 76. Ball screw; 77. Sleeve; 78. Long plate; 79. Long groove; 710. Rod groove; 8. Air blowing mechanism; 81. Air pump; 82. Air pipe one; 83. Blowing head one; 84. Air pipe two; 85. Blowing head two; 86. Sleeve ring; 87. Fixed ring; 9. Connecting rod; 10. Ring; 11. Ultrasonic detection head two; 12. Inner cleaning structure; 121. Side ring; 122. Extension rod; 123. Cleaning block one; 13. Outer cleaning structure; 131. Linking rod; 132. Cleaning block two; 14. Fixed rod; 15. Fixed structure; 151. Circular shell; 152. Turntable; 153. Channel; 154. Slide block; 155. Circular plate; 156. Connecting plate; 157. Slide groove; 158. Slide rod; 159. Arc plate; 1510. Notch; 16. Clamping block; 17. Clamping groove. Detailed implementation manners
[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.
[0020] As Figures 1 - 8As shown in the figure, the circular motion structure 4 includes a fixed housing 41 provided at the output end of the cylinder 3, a motor 42 provided inside the fixed housing 41, a driving rod 43 provided at the output end of the motor 42, a sun gear 44 provided on the surface of the driving rod 43, a planetary gear 45 meshing with one end of the sun gear 44, a ring gear 46 meshing with the other end of the planetary gear 45, and a driven rod 47 provided on one side of the planetary gear 45. The driving rod 43 is connected to the inner side of the ring 10, and the ring 10 is flush with the position of the weld at the inner surface of the flange 5, facilitating driving.
[0021] The monitoring structure 6 includes a ring 61 provided at one end of the driven rod 47, an inclined rod 62 provided at one end of the ring 61, and an ultrasonic detector 63 provided at one end of the inclined rod 62, facilitating the monitoring of the weld at the outer surface of the flange 5.
[0022] The telescopic structure 7 includes a rod groove 710 opened on the surface of the ring 10. A rotating rod 75 is movably connected inside the rod groove 710. A main gear 74 is provided on the surface of the rotating rod 75. One end of the main gear 74 meshes with a rack 73. One end of the rack 73 is provided with a hydraulic rod 72. The bottom end of the hydraulic rod 72 is provided with a support plate 71. One end of the support plate 71 is connected to the bottom end of the ring 10. One end of the rotating rod 75 is provided with a ball screw 76. A sleeve 77 is threadedly connected to the surface of the ball screw 76. The sleeve 77 is connected to the ultrasonic detector 11, facilitating the adjustment of the position of the ultrasonic detector 11 according to the size of the flange 5, with high flexibility.
[0023] On one side of the ring 61, an outer cleaning structure 13 is provided. The outer cleaning structure 13 includes a linkage rod 131 provided on one side of the ring 61. A cleaning block 132 is provided on one side of the linkage rod 131. The cleaning block 132 is in a triangular shape, and the cleaning block 132 cleans the dust and impurities at the weld of the outer surface of the flange 5.
[0024] At the bottom end of the fixed housing 41, an air blowing mechanism 8 is provided. The air blowing mechanism 8 includes an air pump 81 provided at the bottom end of the fixed housing 41. One end of the air pump 81 is connected to an air pipe 82 and an air pipe 84. One end of each of the air pipe 82 and the air pipe 84 is connected to a blowing head 83 and a blowing head 85 respectively. The air pipe 82 and the air pipe 84 are made of flexible hose material. The blowing head 83 and the blowing head 85 are inclined. The blowing head 83 and the blowing head 85 blow away the impurities and dust at the welds of the outer and inner surfaces of the flange 5 respectively, improving the cleaning efficiency and quality.
[0025] On one side of the sleeve 77, an inner cleaning structure 12 is provided. The inner cleaning structure 12 includes a side ring 121 provided on the surface of the sleeve 77. One end of the side ring 121 is provided with an extension rod 122. One end of the extension rod 122 is provided with a cleaning block 123. The cleaning block 123 cleans the dust and impurities at the weld of the inner surface of the flange 5, realizing the simultaneous monitoring of the welds on the inner and outer surfaces of the flange 5.
[0026] One side of the sleeve 77 is provided with an inner cleaning structure 12. The inner cleaning structure 12 includes a side ring 121 arranged on the surface of the sleeve 77. One end of the side ring 121 is provided with an extension rod 122, and one end of the extension rod 122 is provided with a first cleaning block 123. The first cleaning block 123 cleans the dust and impurities at the weld of the inner surface of the flange 5, improving the accuracy of monitoring.
[0027] A collar 86 is sleeved on the surface of the first air pipe 82. The collar 86 is connected to the connecting rod 9, and the connecting rod 9 is connected to the linkage rod 131. A fixing ring 87 is sleeved on the surface of the second air pipe 84. The fixing ring 87 is connected to the fixing rod 14, and the fixing rod 14 is connected to the side ring 121, facilitating simultaneous movement.
[0028] Specifically, first, the staff operates the external manipulator to place the flange 5 whose weld needs to be monitored at the center position of the workbench 1. Placing the flange 5 at the center of the workbench 1 is a pre-set movement trajectory of the manipulator, which is prior art and will not be described in detail here. Then, the cylinder 3 at one end of the frame 2 is started through an external button, and the cylinder 3 drives the fixed shell 41 at the output end to move downward to an appropriate position. And the motor 42 fixed to the inner wall of the fixed shell 41 is started through an external button. The motor 42 drives the driving rod 43 at the output end to rotate. The driving rod 43 drives the sun gear 44 on the surface to mesh with the planetary gear 45. The planetary gear 45 meshes with the gear ring 46. The gear ring 46 is fixed to the inner wall of the fixed shell 41. And the planetary gear 45 drives the driven rod 47 to move in a circular motion around the sun gear 44. The driven rod 47 moves in the annular groove 48 opened on the bottom surface of the fixed shell 41. The driving rod 43 and the fixed shell 41 are connected by bearings. Thus, the ring 61 connected to the bottom end of the driven rod 47 by a bearing moves in a circular motion. The ring 61 drives the inclined ultrasonic detection head one 63 connected by the inclined rod 62 to monitor whether there are problems such as pores, inclusions, and cracks on the outer surface weld of the flange 5. At the same time, a circular ring 10 is provided at a position flush with the weld on the inner surface of the driving rod 43 and the flange 5. And a telescopic structure 7 is provided on one side of the circular ring 10. One end of the telescopic structure 7 drives the ultrasonic detection head two 11 to move to the inner surface weld of the flange 5 for monitoring. The hydraulic rod 72 fixed to the support plate 71 at one end of the circular ring 10 is started through an external button. The hydraulic rod 72 drives the rack 73 at the output end to move. The rack 73 meshes with the main gear 74. The main gear 74 drives the rotating rod 75 to rotate multiple circles. The rack 73 drives the long plate 78 at the top to move in the long groove 79 opened inside the circular ring 10. One end of the rotating rod 75 is movably connected to the inner wall of the rod groove 710 opened on the surface of the circular ring 10. The rotating rod 75 drives the ball screw 76 at one end to be threadedly connected to the sleeve 77. The sleeve 77 drives the ultrasonic detection head two 11 at one end to move outward to the inner surface weld of the flange 5 to start the monitoring work. Thus, the simultaneous monitoring of the inner and outer surface welds of the flange 5 is realized, improving the comprehensiveness and efficiency of the monitoring; And in the early stage of starting the monitoring, after the ultrasonic detection head one 63 and the ultrasonic detection head two 11 are in place, the air pump 81 at the bottom end of the fixed shell 41 is started through an external button. The gas generated by the air pump 81 is transported to the blowing head one 83 through the air pipe one 82 made of a hose material. And the blowing head one 83 is inclined. The blowing head one 83 blows off the impurities and dust on the outer surface weld of the flange 5. The air pump 81 also transports the gas to the blowing head two 85 through the air pipe two 84 connected to the bottom end. The blowing head two 85 is also inclined. The blowing head two 85 blows off the impurities and dust on the inner surface weld of the flange 5. The impurities on the inner and outer welds of the flange 5 are blown off, improving the cleaning efficiency and quality; At one end of the ring 61, a linkage rod 131 is provided to drive a second cleaning block 132 with a triangular end to clean and remove impurities from the weld on the outer surface of the flange 5. As the driven rod 47 moves in a circular motion, the second cleaning block 132 cleans around the weld on the outer surface of the flange 5. At the same time, the linkage rod 131 drives the first air pipe 82 fixed by the collar 86 at one end of the connecting rod 9 to also move in a circular motion. While the second cleaning block 132 cleans the weld, the first blowing head 83 blows away impurities and dust on the surface of the weld. Similarly, a side ring 121 is sleeved on the surface of the sleeve 77. One side of the side ring 121 is connected to a first cleaning block 123 through an extension rod 122. And a fixed ring 87 is connected to one end of the side ring 121 through a fixing rod 14. The fixed ring 87 is fixed on the surface of the second air pipe 84. The first cleaning block 123 and the second blowing head 85 rotate with the driving rod 43 to clean, blow air, and monitor the weld on the inner surface of the flange 5. By using two different cleaning means of the cleaning block and the blowing head, impurities and dust on the surface of the weld can be removed more thoroughly, improving the cleaning effect and monitoring accuracy, and enhancing the comprehensiveness and uniformity of cleaning and blowing.
[0029] As Figures 9 - 10 shown, a fixing structure 15 is provided at one end of the driving rod 43. The fixing structure 15 includes a turntable 152 provided on the surface of the driving rod 43. Four groups of equally spaced channel grooves 153 are formed on the surface of the turntable 152. The four groups of channel grooves 153 are arc-shaped. A slider 154 slides in each of the four groups of channel grooves 153. The bottom end of the driving rod 43 is connected to a circular plate 155 through a bearing. The driving rod 43 is connected to the fixed shell 41 through a bearing. The ring 10 is flush with the position of the weld on the inner surface of the flange 5. A circular shell 151 is provided outside the circular plate 155. A connecting plate 156 is provided on the surface of the circular plate 155. Four groups of equally spaced connecting plates 156 are provided. A chute 157 is formed on the surface of each of the four groups of connecting plates 156. A slide rod 158 slides in each of the chutes 157. The slide rod 158 is connected to the slider 154. An arc plate 159 is provided at one end of the slide rod 158. A notch 1510 is formed on the surface of the circular shell 151. The arc plate 159 corresponds to the position of the notch 1510.
[0030] A clamping groove 17 is formed on the top surface of the workbench 1. A clamping block 16 is provided at the bottom end of the circular shell 151. The clamping block 16 corresponds to the position of the clamping groove 17, which is convenient for fixing the circular shell 151 to prevent it from moving.
[0031] Specifically, the driving rod 43 drives the connected fixing structure 15 to move downward into the inside of the flange 5, and the clamping block 16 at the bottom end of the circular shell 151 is engaged and fixed with the clamping groove 17 opened on the surface of the workbench 1. The driving rod 43 drives the turntable 152 to rotate, so that the slider 154 inside the four arc-shaped channels 153 equally spaced on the surface of the turntable 152 slides from the end close to the driving rod 43 in the channel 153 to the end far from the driving rod 43, causing the slider 154 to drive the sliding rod 158 to slide outward in the sliding groove 157 opened on the surface of the connecting plate 156. The connecting plate 156 is connected to the circular plate 155, the circular plate 155 is movably connected to the driving rod 43, and the circular plate 155 is fixedly connected to the circular shell 151. Thus, the four sliding rods 158 drive the four arc-shaped plates 159 to move outward. Since the positions of the four arc-shaped plates 159 correspond to the four notches 1510 opened on the surfaces of the four circular shells 151, further, the four arc-shaped plates 159 move out of the four notches 1510 and approach the inner surface of the flange 5. Thus, the diameters of the four arc-shaped plates 159 are equal to the maximum diameter of the inner surface of the flange 5. Further, the four arc-shaped plates 159 clamp and fix the inside of the flange 5, avoiding movement during the monitoring process, affecting the accuracy of the monitoring, and not easily moving or shaking, thereby ensuring the stability and accuracy during the monitoring process.
[0032] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and described in the embodiments. Without departing from the principle, the embodiments of the present invention can have any deformation or modification.
Claims
1. A large-diameter pipeline flange weld quality monitoring system, including a workbench (1), characterized in that: A flange (5) is placed at the center of the top surface of the workbench (1). One end of the workbench (1) is provided with a frame (2). One end of the frame (2) is provided with a cylinder (3). One end of the cylinder (3) is provided with a circular motion structure (4). One end of the circular motion structure (4) is provided with a monitoring structure (6). A circular ring (10) is arranged on one side of the circular motion structure (4). One side of the circular ring (10) is provided with a telescopic structure (7). One side of the telescopic structure (7) is provided with an ultrasonic detection head two (11). The circular motion structure (4) includes a fixed shell (41) arranged at the output end of the cylinder (3), a motor (42) arranged inside the fixed shell (41), a driving rod (43) arranged at the output end of the motor (42), a sun gear (44) arranged on the surface of the driving rod (43), a planetary gear (45) meshing with one end of the sun gear (44), a tooth ring (46) meshing with the other end of the planetary gear (45), and a driven rod (47) arranged on one side of the planetary gear (45). The driving rod (43) is connected to the inner side of the circular ring (10). The monitoring structure (6) includes a ring (61) arranged at one end of the driven rod (47), an inclined rod (62) arranged at one end of the ring (61), and an ultrasonic detection head one (63) arranged at one end of the inclined rod (62). The telescopic structure (7) includes a rod groove (710) opened on the surface of the circular ring (10). A rotating rod (75) is movably connected inside the rod groove (710). A main gear (74) is arranged on the surface of the rotating rod (75). One end of the main gear (74) meshes with a rack (73). One end of the rack (73) is provided with a hydraulic rod (72). The bottom end of the hydraulic rod (72) is provided with a support plate (71). One end of the support plate (71) is connected to the bottom end of the circular ring (10). One end of the rotating rod (75) is provided with a ball screw (76). A sleeve (77) is threadedly connected to the surface of the ball screw (76). The sleeve (77) is connected to the ultrasonic detection head two (11).
2. The quality monitoring system for the weld seam of a large-diameter pipeline flange according to claim 1, characterized in that: The tooth ring (46) is connected to the inner wall of the fixed shell (41). An annular groove (48) is opened on the bottom surface of the fixed shell (41). The driven rod (47) moves in the annular groove (48).
3. A large-diameter pipeline flange weld quality monitoring system according to claim 1, characterized in that: One end of the rotating rod (75) is provided with a ball screw (76). A long groove (79) is opened inside the circular ring (10). A long plate (78) slides inside the long groove (79). The long plate (78) is connected to the rack (73).
4. The quality monitoring system for the large-diameter pipeline flange weld according to claim 2, wherein: An air blowing mechanism (8) is arranged at the bottom end of the fixed shell (41). The air blowing mechanism (8) includes an air pump (81) arranged at the bottom end of the fixed shell (41). One end of the air pump (81) is connected with an air pipe one (82) and an air pipe two (84). One end of the air pipe one (82) and the air pipe two (84) are respectively connected with a blowing head one (83) and a blowing head two (85). The air pipe one (82) and the air pipe two (84) are made of flexible pipe material. The blowing head one (83) and the blowing head two (85) are inclined. The blowing head one (83) and the blowing head two (85) respectively blow off impurities and dust at the welds on the outer and inner surfaces of the flange (5).
5. The quality monitoring system for the weld seam of a large-diameter pipeline flange according to claim 3, characterized in that: On one side of the sleeve (77), an inner cleaning structure (12) is provided. The inner cleaning structure (12) includes a side ring (121) arranged on the surface of the sleeve (77). One end of the side ring (121) is provided with an extension rod (122). One end of the extension rod (122) is provided with a first cleaning block (123), and the first cleaning block (123) cleans the dust and impurities at the weld of the inner surface of the flange (5).
6. The quality monitoring system for the weld seam of a large-diameter pipeline flange according to claim 4, wherein: On one side of the ring (61), an outer cleaning structure (13) is provided. The outer cleaning structure (13) includes a linkage rod (131) arranged on one side of the ring (61). One side of the linkage rod (131) is provided with a second cleaning block (132). The second cleaning block (132) is in the shape of a triangular prism, and the second cleaning block (132) cleans the dust and impurities at the weld of the outer surface of the flange (5).
7. The quality monitoring system for the weld seam of a large-diameter pipeline flange according to claim 6, characterized in that: A collar (86) is sleeved on the surface of the first air pipe (82). The collar (86) is connected to the connecting rod (9), and the connecting rod (9) is connected to the linkage rod (131). A fixing ring (87) is sleeved on the surface of the second air pipe (84). The fixing ring (87) is connected to the fixing rod (14), and the fixing rod (14) is connected to the side ring (121).
8. The quality monitoring system for the weld seam of a large-diameter pipeline flange according to claim 2, wherein: One end of the driving rod (43) is provided with a fixing structure (15). The fixing structure (15) includes a turntable (152) arranged on the surface of the driving rod (43). A channel (153) is opened on the surface of the turntable (152). Four groups of channels (153) are arranged at equal intervals. The four groups of channels (153) are arc-shaped. Each of the four groups of channels (153) slides with a slider (154). The bottom end of the driving rod (43) is connected to a circular plate (155) through a bearing. A circular shell (151) is arranged outside the circular plate (155). A connecting plate (156) is arranged on the surface of the circular plate (155). Four groups of connecting plates (156) are arranged at equal intervals. Each of the four groups of connecting plates (156) is provided with a chute (157) on its surface. Each of the chutes (157) slides with a sliding rod (158). The sliding rod (158) is connected to the slider (154). One end of the sliding rod (158) is provided with an arc plate (159). A notch (1510) is opened on the surface of the circular shell (151), and the arc plate (159) corresponds to the notch (1510) in position.
9. A large-diameter pipeline flange weld quality monitoring system according to claim 8, characterized in that: A clamping groove (17) is opened on the top surface of the workbench (1). A clamping block (16) is arranged at the bottom end of the circular shell (151), and the clamping block (16) corresponds to the clamping groove (17) in position.
10. A large-diameter pipeline flange weld quality monitoring system according to claim 1, characterized in that: The driving rod (43) is connected to the fixed shell (41) through a bearing, and the ring (10) is flush with the weld at the inner surface of the flange (5).