Flaw detection device for production of precise seamless steel tube for drill rod of rotary drilling rig

Abstract

The invention relates to the technical field of precision seamless steel tube detection, in particular to a flaw detection device for production of a precision seamless steel tube for a drill rod of a rotary drilling rig, which comprises an operation table, a clamping mechanism for clamping a steel tube is arranged on the side wall of the bottom end of the operation table, and a flaw detection mechanism for flaw detection of the surface of the steel tube is arranged on the side wall of the bottom end of the operation table. According to the flaw detection device for production of the precise seamless steel pipe for the rotary drilling rig drill rod, the cleaning mechanism and the flaw detection mechanism achieve gear linkage and synchronous rotation through the same rotating shaft, oxide skin, scrap iron and other impurities on the surface of a steel pipe and protruding strip gaps are comprehensively removed, and in the cleaning process, the slag suction mechanism directionally blows away the impurities through an air spraying head; and the slag suction holes perform negative-pressure adsorption and are intensively stored through the collection box, so that impurity residues are prevented from interfering flaw detection signals.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of precision seamless steel pipe detection, and particularly relates to a flaw detection device for precision seamless steel pipe production for rotary drilling rig drill rod. BACKGROUND

[0002] The rotary drilling rig drill rod is a core bearing component for pile construction, and the main body thereof is processed by using a precision seamless steel pipe. Surface and internal defects of the steel pipe directly affect torque transmission efficiency, structural strength and service life of the drill rod. In severe cases, the drill rod may be broken during construction, causing safety accidents.

[0003] The existing flaw detection device for the precision seamless steel pipe for the rotary drilling rig drill rod has many deficiencies. Firstly, impurities such as oxide scale, iron filings and dust produced during production are often attached to the surface of the steel pipe, and part of the outer wall of the drill rod is provided with a convex strip structure for transmitting torque. The traditional device lacks a targeted cleaning mechanism, and the impurities and convex strip gaps can easily interfere with the flaw detection signal, resulting in defect misjudgment or omission. Secondly, the clamping and positioning mechanism has poor adaptability and is difficult to accurately match steel pipes of different diameters. Moreover, the clamping mechanism cannot identify the position of the convex strip and is prone to cause flaw detection blind area. In addition, the flaw detection mechanism is mainly fixed-angle detection and cannot realize full-range scanning of the steel pipe in the circumferential and longitudinal directions, so it is difficult to cover the defects in the key areas such as the periphery of the convex strip. In order to solve the above problems, the present application provides a flaw detection device for precision seamless steel pipe production for rotary drilling rig drill rod. SUMMARY

[0004] The main purpose of the present application is to provide a flaw detection device for precision seamless steel pipe production for rotary drilling rig drill rod, which can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: A flaw detection device for precision seamless steel pipe production for rotary drilling rig drill rod, comprising an operation table, wherein the side wall at the bottom end of the operation table is provided with a clamping mechanism for clamping the steel pipe, and the side wall at the bottom end of the operation table is provided with a flaw detection mechanism for detecting the surface of the steel pipe. The flaw detection mechanism comprises a protective cover provided on the side wall at the bottom end of the operation table, a fourth electric telescopic rod is arranged on the inner side wall at the bottom end of the protective cover, a first fixed ring is arranged on the telescopic end of the fourth electric telescopic rod, a slag suction mechanism for collecting dust is arranged on the inner side wall of the first fixed ring, and a cleaning mechanism for cleaning the surface of the steel pipe is arranged on the inner side wall of the first fixed ring.

[0006] Preferably, a fifth gear wheel is rotatably connected to the inner side wall of the first fixed ring, an ultrasonic flaw detection detector is arranged on the inner side wall of the fifth gear wheel, a third motor is arranged on the top end of the first fixed ring, a rotating shaft is arranged on the output end of the third motor, a fourth gear wheel is arranged on one end of the rotating shaft, and the fourth gear wheel is engaged with the fifth gear wheel.

[0007] Preferably, the cleaning mechanism includes a sixth gear rotatably connected to the inner wall of the first fixed ring, and a seventh gear disposed on the outer wall of the rotating shaft. The seventh gear meshes with the sixth gear. A fifth electric telescopic rod is disposed on the inner wall of the sixth gear. A guide plate is disposed at the telescopic end of the fifth electric telescopic rod. A sixth electric telescopic rod is disposed at the bottom end of the guide plate. A guide sleeve is disposed at the telescopic end of the sixth electric telescopic rod. A distance sensor is disposed at the top of the inner wall of the guide sleeve. Multiple elastic components are disposed at the top of the inner wall of the guide sleeve. A guide frame is disposed at the other end of the elastic components. A third roller is rotatably connected to the inner wall of the guide frame.

[0008] Preferably, a seventh electric telescopic rod is provided at the bottom of the guide plate, a cleaning frame is provided at the telescopic end of the seventh electric telescopic rod, a fourth motor is provided on one side wall of the cleaning frame, a cleaning rod is provided at the output end of the fourth motor, an eighth gear is provided at one end of the cleaning rod through the cleaning frame, a ninth gear is rotatably connected to one side wall of the cleaning frame, and a second chain is drivingly connected to the eighth gear and the ninth gear.

[0009] Preferably, the inner sidewall of the cleaning frame is provided with two guide rods, one end of the ninth gear is provided with a reciprocating threaded rod through the cleaning frame, the outer sidewall of the reciprocating threaded rod is rotatably connected with a moving block, the inside of the moving block is slidably connected with the outer sidewall of the guide rod, a fifth motor is provided on one sidewall of the moving block, a rotating block is provided at the output end of the fifth motor, and a grinding plate is provided at the bottom end of the rotating block.

[0010] Preferably, the slag suction mechanism includes a second fixed ring disposed on the inner sidewall of the first fixed ring, a first air pump disposed on the outer sidewall of the first fixed ring, the output end of the first air pump being fixedly connected to the inner side of the second fixed ring, a plurality of holes being opened on one sidewall of the second fixed ring, and an air jet head being disposed on the inner sidewall of the corresponding holes. The slag suction mechanism also includes a collection box with a plurality of slag suction holes opened on the inner sidewall of the first fixed ring and fixedly connected to the outer sidewall, a slag suction pipe disposed at the bottom end of the first fixed ring, a second air pump being fixedly connected to one sidewall of the protective cover, the output end of the second air pump being fixedly connected to the other end of the slag suction pipe, the input end of the second air pump being fixedly connected to the top of the collection box, and a drawer being detachably connected to one end of the collection box.

[0011] Preferably, the clamping mechanism includes two second electric telescopic rods fixedly connected to the bottom of the operating table. The telescopic ends of the two second electric telescopic rods are provided with the same clamping frame. A third electric telescopic rod is provided on the top side wall of the clamping frame. A lower pressure plate is provided on the telescopic end of the third electric telescopic rod. A clamping plate is provided at the bottom end of the lower pressure plate. A first roller is rotatably connected to the inner side wall of the clamping plate. Two clamping arc plates are rotatably connected to the inner side wall of the clamping frame. A second roller is rotatably connected to the inner side wall of each of the two clamping arc plates. Two connecting rods are rotatably connected to the inner side wall of the lower pressure plate. The two connecting rods are rotatably connected to the inner side walls of the two clamping arc plates, respectively.

[0012] Preferably, a positioning mechanism for positioning the steel pipe is provided on one side wall of the operating table. The positioning mechanism includes a positioning frame provided on one side wall of the operating table. A first rotating plate is rotatably connected to the inner side wall of the positioning frame. Multiple holes are opened on the inner side wall of the first rotating plate, and a first electric telescopic rod is fixedly connected to the inner side wall of the corresponding hole. Positioning plates are provided at the telescopic ends of the multiple first electric telescopic rods. A pressure sensor is provided on the side wall of the positioning plate. A second gear is provided on one side wall of the first rotating plate. A second motor is provided on one side wall of the positioning frame. A third gear is provided through the output end of the second motor and meshes with the second gear.

[0013] Preferably, the top sidewall of the operating table is provided with a plurality of first electric tracks, and a first electric slider is slidably connected to the inner side of each of the plurality of first electric tracks. A movable plate is provided on the top sidewall of the first electric slider, and a plurality of support plates are provided on the top sidewall of the movable plate.

[0014] Preferably, one of the support plates has a support frame on its side wall, a first motor is provided on the side wall of the support frame, a first gear is rotatably connected to one side wall of the support plate, the output end of the first motor is fixedly connected to one end of a first gear, a first chain is connected to multiple first gears, a transport wheel is provided through the support plate at the other end of the first gear, and an extension slide is provided at the other end of the transport wheel.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This is a flaw detection device for the production of precision seamless steel pipes for rotary drilling rigs. The positioning mechanism uses multiple first electric telescopic rods to push the positioning plate to fit the end of the steel pipe. The pressure difference sensed by the pressure sensor accurately identifies the position of the protrusion on the outer wall of the steel pipe. Then, the second motor drives the gear transmission to rotate the steel pipe to the designated positioning position, effectively avoiding clamping deviation caused by the protrusion. The clamping mechanism adjusts the height through the second electric telescopic rod, and works with the third electric telescopic rod to drive the lower pressure plate and the clamping arc plate to form a multi-directional wrapping clamping. The design of the first and second rollers reduces the friction of the steel pipe during transportation and can adapt to steel pipes of different diameters. The pressure sensor provides secondary feedback to ensure uniform clamping force, providing a stable benchmark for subsequent flaw detection.

[0016] This is a flaw detection device for the production of precision seamless steel pipes for rotary drilling rigs. The cleaning mechanism and the flaw detection mechanism are synchronously rotated through the same rotating shaft via gear linkage. When the third roller rolls and encounters a protrusion, it pushes the guide frame to compress the elastic component. The distance sensor detects the distance change in real time and provides feedback, driving the fifth motor to drive the grinding plate to precisely grind the side wall of the protrusion. At the same time, the fourth motor drives the cleaning rod to rotate at high speed, and the reciprocating threaded rod driven by the ninth gear drives the moving block to drive the grinding plate to move axially back and forth, thoroughly removing oxide scale, iron filings and other impurities from the surface of the steel pipe and the gaps of the protrusion. During the cleaning process, the slag suction mechanism blows away the impurities in a directional manner through the air jet head, and the slag suction hole is used to adsorb the impurities under negative pressure and collect them in the collection box to avoid the impurities remaining and interfering with the flaw detection signal. At the same time, the steel pipe moves axially under the drive of the transport wheel, forming a composite motion trajectory, realizing full-dimensional scanning of the surface, interior and key areas around the protrusion of the steel pipe. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is a cross-sectional schematic diagram of the overall structure of the positioning mechanism of the present invention; Figure 5 This is a schematic diagram of the overall structure of the clamping mechanism of the present invention; Figure 6 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 7 For the present invention Figure 2 Enlarged view of point B in the middle; Figure 8 This is a partial structural diagram of the cleaning mechanism of the present invention; Figure 9 This is a partial cross-sectional view of the cleaning mechanism of the present invention.

[0018] In the diagram: 1. Operating platform; 12. First electric track; 13. First electric slider; 14. Moving plate; 15. Support plate; 16. Transport wheel; 17. Extending slide plate; 18. Support frame; 19. First motor; 191. First gear; 192. First chain; 2. Positioning mechanism; 21. Positioning frame; 22. First rotating plate; 23. First electric telescopic rod; 24. Positioning plate; 25. Pressure sensor; 26. Second gear; 27. Second motor; 28. Third gear; 3. Clamping mechanism; 31. Second electric telescopic rod; 32. Clamping frame; 33. Connecting rod; 34. Third electric telescopic rod; 35. Lower pressure plate; 36. Clamping plate; 37. First roller; 38. Clamping arc plate; 39. Second roller; 4. Flaw detection mechanism; 41. Fourth electric telescopic rod; 42. First fixing ring; 43. Protective cover; 44. Third motor; 45. Ultrasonic flaw detector Detector; 46. Rotating shaft; 47. Fourth gear; 48. Fifth gear; 5. Slag suction mechanism; 51. Second fixed ring; 52. Jet nozzle; 53. First air pump; 54. Collection box; 55. Slag suction hole; 56. Second air pump; 57. Slag suction pipe; 6. Cleaning mechanism; 61. Sixth gear; 62. Fifth electric telescopic rod; 63. Seventh gear; 64. Guide plate; 65. Sixth electric telescopic rod; 66. Guide sleeve; 67. Fourth motor; 68. Distance sensor; 69. Elastic component; 610. Guide frame; 611. Cleaning rod; 612. Third roller; 613. Seventh electric telescopic rod; 614. Cleaning frame; 615. Eighth gear; 616. Second chain; 617. Ninth gear; 618. Reciprocating threaded rod; 619. Moving block; 620. Fifth motor; 621. Rotating block; 622. Grinding plate; 623. Guide rod. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] like Figure 1 - Figure 9 As shown, a flaw detection device for the production of precision seamless steel pipes for rotary drilling rigs includes an operating platform 1. A clamping mechanism 3 for holding the steel pipe is provided on the bottom side wall of the operating platform 1. A flaw detection mechanism 4 for detecting flaws on the surface of the steel pipe is also provided on the bottom side wall of the operating platform 1. The flaw detection mechanism 4 includes a protective cover 43 on the bottom side wall of the operating platform 1. A fourth electric telescopic rod 41 is provided at the bottom end of the inner side wall of the protective cover 43. A first fixing ring 42 is provided at the telescopic end of the fourth electric telescopic rod 41. A dust collection mechanism 5 is provided on the inner side wall of the first fixing ring 42. A cleaning mechanism 6 is provided on the inner side wall of the first fixing ring 42 for cleaning the surface of the steel pipe.

[0021] In this embodiment, a fifth gear 48 is rotatably connected to the inner sidewall of the first fixed ring 42, an ultrasonic flaw detector 45 is provided on the inner sidewall of the fifth gear 48, a third motor 44 is provided at the top of the first fixed ring 42, a rotating shaft 46 is provided at the output end of the third motor 44, a fourth gear 47 is provided at one end of the rotating shaft 46, and the fourth gear 47 meshes with the fifth gear 48.

[0022] Specifically, the fourth gear 47 and the fifth gear 48 at one end of the rotating shaft 46 mesh to drive the ultrasonic flaw detector 45 to rotate around the steel pipe. At the same time, the ultrasonic flaw detector 45 performs all-round scanning inspection on the surface and interior of the steel pipe under the combined motion of circumferential rotation and axial movement of the steel pipe.

[0023] In this embodiment, the cleaning mechanism 6 includes a sixth gear 61 rotatably connected to the inner wall of the first fixed ring 42. The cleaning mechanism 6 also includes a seventh gear 63 disposed on the outer wall of the rotating shaft 46. The seventh gear 63 meshes with the sixth gear 61. A fifth electric telescopic rod 62 is disposed on the inner wall of the sixth gear 61. A guide plate 64 is disposed at the telescopic end of the fifth electric telescopic rod 62. A sixth electric telescopic rod 65 is disposed at the bottom end of the guide plate 64. A guide sleeve 66 is disposed at the telescopic end of the sixth electric telescopic rod 65. A distance sensor 68 is disposed at the top of the inner wall of the guide sleeve 66. A plurality of elastic components 69 are disposed at the top of the inner wall of the guide sleeve 66. A guide frame 610 is disposed at the other end of the elastic components 69. A third roller 612 is rotatably connected to the inner wall of the guide frame 610. A seventh electric telescopic rod 613 is disposed at the bottom end of the guide plate 64. The seventh electric telescopic rod 613 extends... A cleaning frame 614 is provided at the constricted end. A fourth motor 67 is provided on one side wall of the cleaning frame 614. A cleaning rod 611 is provided at the output end of the fourth motor 67. An eighth gear 615 is provided at one end of the cleaning rod 611, which passes through the cleaning frame 614. A ninth gear 617 is rotatably connected to one side wall of the cleaning frame 614. A second chain 616 is drivingly connected between the eighth gear 615 and the ninth gear 617. Two guide rods 623 are provided on the inner side wall of the cleaning frame 614. A reciprocating threaded rod 618 is provided at one end of the ninth gear 617, which passes through the cleaning frame 614. A moving block 619 is rotatably connected to the outer side wall of the reciprocating threaded rod 618. The interior of the moving block 619 is slidably connected to the outer side wall of the guide rod 623. A fifth motor 620 is provided on one side wall of the moving block 619. A rotating block 621 is provided at the output end of the fifth motor 620. A grinding plate 622 is provided at the bottom end of the rotating block 621.

[0024] Specifically, the seventh gear 63 on the outer side of the rotating shaft 46 meshes with the sixth gear 61, driving the cleaning mechanism 6 to rotate synchronously, causing the third roller 612 to roll on the surface of the steel pipe. When the third roller 612 encounters the raised ribs on the surface of the steel pipe, the guide frame 610 moves upward. The distance sensor 68 detects the distance between the top of the guide frame 610 and the top of the inner wall of the guide sleeve 66 in real time, and the feedback signal controls the fifth motor 620 to run, driving the rotating block 621 and the grinding plate 622 to rotate, thereby grinding the side wall of the raised ribs. The fourth motor 67 drives the cleaning rod 611 to rotate at high speed. At the same time, the eighth gear 615 and the second chain 616 drive the ninth gear 617 to rotate, which in turn drives the reciprocating threaded rod 618 to rotate. The moving block 619 moves axially back and forth along the reciprocating threaded rod 618 under the limiting action of the guide rod 623. The grinding plate 622 thoroughly cleans the oxide scale, iron filings, dust and other impurities on the surface of the steel pipe. Subsequently, the high-speed rotating cleaning rod 611 sweeps away the dust and impurities left by grinding and cleaning.

[0025] In this embodiment, the slag suction mechanism 5 includes a second fixed ring 51 disposed on the inner side wall of the first fixed ring 42, a first air pump 53 disposed on the outer side wall of the first fixed ring 42, the output end of the first air pump 53 being fixedly connected to the inner side of the second fixed ring 51, a plurality of holes being opened on one side wall of the second fixed ring 51, and an air jet head 52 being disposed on the inner side wall of the corresponding holes. The slag suction mechanism 5 also includes a plurality of slag suction holes 55 being opened on the inner side wall of the first fixed ring 42 and a collection box 54 being fixedly connected to the outer side wall, a slag suction pipe 57 being disposed at the bottom end of the first fixed ring 42, a second air pump 56 being fixedly connected to one side wall of the protective cover 43, the output end of the second air pump 56 being fixedly connected to the other end of the slag suction pipe 57, the input end of the second air pump 56 being fixedly connected to the top end of the collection box 54, and a drawer being detachably connected to one end of the collection box 54.

[0026] Specifically, when the slag suction mechanism 5 is activated, the first air pump 53 delivers high-pressure gas into the second fixed ring 51, which is then sprayed through the jet nozzle 52 along the rear direction of the steel pipe to blow away the cleaned impurities from the surface. At the same time, the second air pump 56 is activated to generate negative pressure, which sucks in the impurities through the slag suction hole 55 inside the first fixed ring 42 and transports them to the collection box 54 through the slag suction pipe 57. The impurities are filtered and retained by the collection box 54.

[0027] In this embodiment, the clamping mechanism 3 includes two second electric telescopic rods 31 fixedly connected to the bottom of the operating table 1. The telescopic ends of the two second electric telescopic rods 31 are provided with the same clamping frame 32. The top side wall of the clamping frame 32 is provided with a third electric telescopic rod 34. The telescopic end of the third electric telescopic rod 34 is provided with a lower pressure plate 35. The bottom end of the lower pressure plate 35 is provided with a clamping plate 36. The inner side wall of the clamping plate 36 is rotatably connected with a first roller 37. The inner side wall of the clamping frame 32 is rotatably connected with two clamping arc plates 38. The inner side walls of the two clamping arc plates 38 are rotatably connected with second rollers 39. The inner side wall of the lower pressure plate 35 is rotatably connected with two connecting rods 33. The two connecting rods 33 are rotatably connected to the inner side walls of the two clamping arc plates 38 respectively.

[0028] Specifically, the third electric telescopic rod 34 is activated, which pushes the lower pressure plate 35 to move vertically downward. The lower pressure plate 35 drives the two clamping arc plates 38 to retract inward through the connecting rods 33 on both sides. At the same time, the clamping plate 36 at the bottom of the lower pressure plate 35 moves downward in sync until the first roller 37 on the inner side of the clamping plate 36 and the second roller 39 on the inner side of the clamping arc plate 38 are tightly attached to the surface of the steel pipe.

[0029] In this embodiment, a positioning mechanism 2 for positioning the steel pipe is provided on one side wall of the operating table 1. The positioning mechanism 2 includes a positioning frame 21 provided on one side wall of the operating table 1. A first rotating plate 22 is rotatably connected to the inner side wall of the positioning frame 21. Multiple holes are opened on the inner side wall of the first rotating plate 22, and a first electric telescopic rod 23 is fixedly connected to the inner side wall of the corresponding hole. A positioning plate 24 is provided at the telescopic end of each of the multiple first electric telescopic rods 23. A pressure sensor 25 is provided on the side wall of the positioning plate 24. A second gear 26 is provided on one side wall of the first rotating plate 22. A second motor 27 is provided on one side wall of the positioning frame 21. A third gear 28 is provided through the output end of the second motor 27 and meshes with the second gear 26.

[0030] Specifically, multiple first electric telescopic rods 23 are controlled to extend and retract, pushing the positioning plate 24 closer to the end of the steel pipe. When the positioning plate 24 contacts the steel pipe, the pressure sensor 25 on the side wall collects the contact pressure data in real time and feeds it back to the control system. When the pressure contact pressure of several positioning plates 24 is different, the point where the pressure contact pressure of the positioning plate 24 is different is located at the protrusion on the outer side wall of the steel pipe. Then, the first electric telescopic rods 23 stop moving, completing the axial positioning of the steel pipe and preventing the steel pipe from moving during the detection process. Then, the second motor 27 of the positioning mechanism 2 is started. The output end of the second motor 27 drives the third gear 28 to rotate. Through meshing with the second gear 26 on the side wall of the first rotating plate 22, the first rotating plate 22 drives the steel pipe to rotate to the designated positioning position.

[0031] In this embodiment, the top sidewall of the operating platform 1 is provided with multiple first electric tracks 12, and the inner sides of the multiple first electric tracks 12 are slidably connected with first electric sliders 13. The top sidewall of the first electric sliders 13 is provided with a moving plate 14, and the top sidewall of the moving plate 14 is provided with multiple support plates 15. One of the support plates 15 is provided with a support frame 18, and the sidewall of the support frame 18 is provided with a first motor 19. One sidewall of the support plate 15 is rotatably connected with a first gear 191. The output end of the first motor 19 is fixedly connected to one end of a first gear 191. The multiple first gears 191 are connected to a first chain 192 for transmission. The other end of the first gear 191 passes through the support plate 15 and is provided with a transport wheel 16. The other end of the transport wheel 16 is provided with an extension slide plate 17.

[0032] Specifically, multiple sets of first electric tracks 12 are activated, causing the first electric slider 13 to drive the moving plate 14 to move towards each other, and the steel pipe is positioned on the transport wheel 16 by extending the sliding plate 17, ensuring that the axis of the steel pipe is consistent with the rolling direction of the transport wheel 16, and avoiding the steel pipe from deviating and getting stuck. Subsequently, the control system operates according to the preset steel pipe diameter parameters.

[0033] It should be noted that this invention is a flaw detection device for the production of precision seamless steel pipes for rotary drilling rigs. The user will activate multiple sets of first electric tracks 12 according to the diameter of the precision seamless steel pipe to be inspected, so that the first electric slider 13 drives the moving plate 14 to move towards each other, and the steel pipe is positioned on the transport wheel 16 by extending the sliding plate 17, ensuring that the axis of the steel pipe is consistent with the rolling direction of the transport wheel 16 to avoid the steel pipe from deviating and getting stuck. Subsequently, the control system activates the second electric telescopic rod 31 according to the preset steel pipe diameter parameters, adjusts the height of the clamping frame 32, and keeps the central axis of the clamping frame 32 coincident with the axis of the steel pipe to ensure uniform clamping force. At the same time, the fourth electric telescopic rod 41 is activated to push the first fixing ring 42 to move in the vertical direction, so that the central axis of the first fixing ring 42 coincides with the axis of the steel pipe.

[0034] Subsequently, the first motor 19 is started, driving the first gear 191 connected to it to rotate. Through the first chain 192, all the first gears 191 rotate synchronously, thereby driving the transport wheel 16 to rotate and smoothly transport the steel pipe to the positioning mechanism 2. When the head end of the steel pipe reaches the first positioning mechanism 2, the first motor 19 stops. Then, multiple first electric telescopic rods 23 are controlled to extend and retract, pushing the positioning plate 24 closer to the end of the steel pipe. When the positioning plate 24 contacts the steel pipe, the pressure sensor 25 on the side wall collects contact pressure data in real time and feeds it back to the control system. When the contact pressure of several positioning plates 24 is different, this point of difference is located at the protrusion on the outer wall of the steel pipe. Then, the first electric telescopic rods 23 stop moving, completing the axial positioning of the steel pipe and preventing it from shifting during the testing process. Finally, the positioning mechanism 2 is started. The second motor 27 drives the third gear 28 to rotate. By meshing with the second gear 26 on the side wall of the first rotating plate 22, the first rotating plate 22 drives the steel pipe to rotate to the designated positioning position. The third electric telescopic rod 34 is activated, which pushes the lower pressure plate 35 to move vertically downward. The lower pressure plate 35 drives the two clamping arc plates 38 to retract inward through the connecting rods 33 on both sides. At the same time, the clamping plate 36 at the bottom of the lower pressure plate 35 moves down synchronously until the first roller 37 on the inner side of the clamping plate 36 and the second roller 39 on the inner side of the clamping arc plate 38 are tightly attached to the surface of the steel pipe, forming a multi-directional wrapping clamp. The roller design reduces the friction during the transport of the steel pipe and avoids excessive clamping force that could damage the surface of the steel pipe. After clamping is completed, the pressure sensor 25 provides secondary feedback of the force data. Subsequently, the first motor 19 restarts, driving the steel pipe to move towards the flaw detection mechanism 4.

[0035] After the steel pipe enters the first fixed ring 42, the fifth electric telescopic rod 62 of the cleaning mechanism 6 is activated, the radial position of the guide plate 64 is adjusted so that the guide sleeve 66 is aligned with the steel pipe, and the side wall of the third roller 612 is gently pressed against the surface of the steel pipe. Then the third motor 44 is activated, which drives the rotating shaft 46 to rotate. At the same time, the seventh gear 63 on the outside of the rotating shaft 46 meshes with the sixth gear 61, driving the cleaning mechanism 6 to rotate synchronously, so that the third roller 612 rolls on the surface of the steel pipe. When the third roller 612 encounters the raised ridges on the surface of the steel pipe, the guide frame 610 moves upward, and the distance sensor 6... 8. Real-time detection of the distance between the top of the guide frame 610 and the top of the inner wall of the guide sleeve 66, feedback signal controls the operation of the fifth motor 620, driving the rotating block 621 and the grinding plate 622 to rotate, thereby grinding the side wall of the protrusion. The fourth motor 67 is started, the fourth motor 67 drives the cleaning rod 611 to rotate at high speed, and at the same time drives the ninth gear 617 to rotate through the eighth gear 615 and the second chain 616, thereby driving the reciprocating threaded rod 618 to rotate. The moving block 619 moves axially back and forth along the reciprocating threaded rod 618 under the limiting action of the guide rod 623. The grinding plate 622 grinds the surface of the steel pipe. The surface is thoroughly cleaned of oxide scale, iron filings, dust, and other impurities. Then, a high-speed rotating cleaning rod 611 sweeps away the dust and impurities removed during grinding and cleaning. Simultaneously, the slag suction mechanism 5 is activated. The first air pump 53 delivers high-pressure gas into the second fixed ring 51, which is then sprayed through the jet nozzle 52 along the rear of the steel pipe, blowing away the cleaned impurities. At the same time, the second air pump 56 generates negative pressure, sucking in impurities through the slag suction hole 55 inside the first fixed ring 42. The impurities are then transported to the collection box 54 via the slag suction pipe 57, where they are filtered and retained to prevent secondary pollution. After processing, the transport wheel 16 starts again, and the fourth gear 47 and the fifth gear 48 at one end of the rotating shaft 46 mesh, driving the ultrasonic flaw detector 45 to rotate around the steel pipe. At the same time, under the combined motion of circumferential rotation and axial movement of the steel pipe, the ultrasonic flaw detector 45 performs all-round scanning and detection on the surface and interior of the steel pipe, and transmits defect signals, such as cracks, shrinkage cavities, and slag inclusions, to the control system in real time. The system automatically records the defect location, size and other data. Furthermore, if a serious defect is detected during the flaw detection process, the control system immediately issues an alarm signal, and the steel pipe is suspended from transport, awaiting manual confirmation.

[0036] When the steel pipe has completely passed through the flaw detection mechanism 4, the ultrasonic flaw detector 45 stops rotating, the fourth electric telescopic rod 41 drives the first fixed ring 42 to reset, the slag suction mechanism 5 continues to work for thirty seconds to ensure that all impurities are recovered, the first air pump 53 and the second air pump 56 stop running, the control system integrates the detection data, generates a detection report, distinguishes between qualified and unqualified steel pipes, if qualified, the clamping mechanism 3 and the positioning mechanism 2 reset synchronously, the transport wheel 16 continues to drive the steel pipe to move, and it is transported to the qualified product unloading area through the extension slide plate 17. If unqualified, the sorting mechanism is started to transport the steel pipe to the unqualified product storage area and mark the defect location. The operator takes out the drawer of the collection box 54, cleans the recovered impurities, and the equipment is reset to the initial state to prepare for the next steel pipe to be inspected.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A flaw detection device for the production of precision seamless steel pipes for rotary drilling rigs, comprising an operating table (1), characterized in that: The bottom side wall of the operating table (1) is provided with a clamping mechanism (3) for clamping the steel pipe, and the bottom side wall of the operating table (1) is provided with a flaw detection mechanism (4) for detecting flaws on the surface of the steel pipe. The flaw detection mechanism (4) includes a protective cover (43) provided on the bottom side wall of the operating table (1). The bottom end of the inner side wall of the protective cover (43) is provided with a fourth electric telescopic rod (41). The telescopic end of the fourth electric telescopic rod (41) is provided with a first fixing ring (42). The inner side wall of the first fixing ring (42) is provided with a dust suction mechanism (5) for collecting dust, and the inner side wall of the first fixing ring (42) is provided with a cleaning mechanism (6) for cleaning the surface of the steel pipe.

2. The flaw detection device for the production of precision seamless steel pipes for rotary drilling rig drill rods according to claim 1, characterized in that: The inner wall of the first fixed ring (42) is rotatably connected to a fifth gear (48), and the inner wall of the fifth gear (48) is provided with an ultrasonic flaw detector (45). The top of the first fixed ring (42) is provided with a third motor (44), and the output end of the third motor (44) is provided with a rotating shaft (46). One end of the rotating shaft (46) is provided with a fourth gear (47), and the fourth gear (47) meshes with the fifth gear (48).

3. The flaw detection device for the production of precision seamless steel pipes for rotary drilling rig drill rods according to claim 1, characterized in that: The cleaning mechanism (6) includes a sixth gear (61) rotatably connected to the inner wall of the first fixed ring (42). The cleaning mechanism (6) also includes a seventh gear (63) disposed on the outer wall of the rotating shaft (46). The seventh gear (63) meshes with the sixth gear (61). A fifth electric telescopic rod (62) is disposed on the inner wall of the sixth gear (61). A guide plate (64) is disposed at the telescopic end of the fifth electric telescopic rod (62). A sixth electric telescopic rod (65) is disposed at the bottom end of the guide plate (64). A guide sleeve (66) is disposed at the telescopic end of the sixth electric telescopic rod (65). A distance sensor (68) is disposed at the top of the inner wall of the guide sleeve (66). A plurality of elastic components (69) are disposed at the top of the inner wall of the guide sleeve (66). A guide frame (610) is disposed at the other end of the elastic component (69). A third roller (612) is rotatably connected to the inner wall of the guide frame (610).

4. A flaw detection device for the production of precision seamless steel pipes for rotary drilling rig drill rods according to claim 3, characterized in that: The bottom end of the guide plate (64) is provided with a seventh electric telescopic rod (613), the telescopic end of the seventh electric telescopic rod (613) is provided with a cleaning frame (614), a fourth motor (67) is provided on one side wall of the cleaning frame (614), a cleaning rod (611) is provided at the output end of the fourth motor (67), an eighth gear (615) is provided through the cleaning frame (614) at one end of the cleaning rod (611), a ninth gear (617) is rotatably connected to one side wall of the cleaning frame (614), and a second chain (616) is drivingly connected between the eighth gear (615) and the ninth gear (617).

5. A flaw detection device for the production of precision seamless steel pipes for rotary drilling rig drill rods according to claim 4, characterized in that: Two guide rods (623) are provided on the inner side wall of the cleaning frame (614). One end of the ninth gear (617) passes through the cleaning frame (614) and is provided with a reciprocating threaded rod (618). A moving block (619) is rotatably connected to the outer side wall of the reciprocating threaded rod (618). The interior of the moving block (619) is slidably connected to the outer side wall of the guide rod (623). A fifth motor (620) is provided on one side wall of the moving block (619). A rotating block (621) is provided at the output end of the fifth motor (620). A grinding plate (622) is provided at the bottom end of the rotating block (621).

6. A flaw detection device for the production of precision seamless steel pipes for rotary drilling rig drill rods according to claim 1, characterized in that: The slag suction mechanism (5) includes a second fixed ring (51) provided on the inner side wall of the first fixed ring (42), a first air pump (53) provided on the outer side wall of the first fixed ring (42), the output end of the first air pump (53) being fixedly connected to the inner side of the second fixed ring (51), a plurality of holes being opened on one side wall of the second fixed ring (51), and an air jet head (52) being provided on the inner side wall of the corresponding holes. The slag suction mechanism (5) also includes a collection box (54) fixedly connected to the outer side wall of the first fixed ring (42) with a plurality of slag suction holes (55) being opened on the inner side wall of the first fixed ring (42), a slag suction pipe (57) being provided at the bottom end of the first fixed ring (42), a second air pump (56) being fixedly connected to one side wall of the protective cover (43), the output end of the second air pump (56) being fixedly connected to the other end of the slag suction pipe (57), the input end of the second air pump (56) being fixedly connected to the top of the collection box (54), and a drawer being detachably connected to one end of the collection box (54).

7. A flaw detection device for the production of precision seamless steel pipes for rotary drilling rig drill rods according to claim 1, characterized in that: The clamping mechanism (3) includes two second electric telescopic rods (31) fixedly connected to the bottom of the operating table (1). The telescopic ends of the two second electric telescopic rods (31) are provided with the same clamping frame (32). The top side wall of the clamping frame (32) is provided with a third electric telescopic rod (34). The telescopic end of the third electric telescopic rod (34) is provided with a lower pressure plate (35). The bottom end of the lower pressure plate (35) is provided with a clamping plate (36). The inner side wall of the clamping plate (36) is rotatably connected with a first roller (37). The inner side wall of the clamping frame (32) is rotatably connected with two clamping arc plates (38). The inner side walls of the two clamping arc plates (38) are rotatably connected with second rollers (39). The inner side wall of the lower pressure plate (35) is rotatably connected with two connecting rods (33). The two connecting rods (33) are rotatably connected to the inner side walls of the two clamping arc plates (38) respectively.

8. A flaw detection device for the production of precision seamless steel pipes for rotary drilling rig drill rods according to claim 1, characterized in that: The operating table (1) is provided with a positioning mechanism (2) for positioning the steel pipe on one side wall. The positioning mechanism (2) includes a positioning frame (21) provided on one side wall of the operating table (1). A first rotating plate (22) is rotatably connected to the inner side wall of the positioning frame (21). Multiple holes are opened on the inner side wall of the first rotating plate (22), and a first electric telescopic rod (23) is fixedly connected to the inner side wall of the corresponding hole. A positioning plate (24) is provided at the telescopic end of each of the multiple first electric telescopic rods (23). A pressure sensor (25) is provided on the side wall of the positioning plate (24). A second gear (26) is provided on one side wall of the first rotating plate (22). A second motor (27) is provided on one side wall of the positioning frame (21). A third gear (28) is provided through the positioning frame (21) at the output end of the second motor (27). The third gear (28) meshes with the second gear (26).

9. A flaw detection device for the production of precision seamless steel pipes for rotary drilling rig drill rods according to claim 1, characterized in that: The top sidewall of the operating table (1) is provided with multiple first electric tracks (12), and the inner side of each of the multiple first electric tracks (12) is slidably connected with a first electric slider (13). The top sidewall of the first electric slider (13) is provided with a moving plate (14), and the top sidewall of the moving plate (14) is provided with multiple support plates (15).

10. A flaw detection device for the production of precision seamless steel pipes for rotary drilling rig drill rods according to claim 9, characterized in that: One of the support plates (15) has a support frame (18) on its side wall. The support frame (18) has a first motor (19) on its side wall. The support plate (15) has a first gear (191) rotatably connected to one side wall. The output end of the first motor (19) is fixedly connected to one end of a first gear (191). Multiple first gears (191) are connected to a first chain (192). The other end of the first gear (191) passes through the support plate (15) and has a transport wheel (16). The other end of the transport wheel (16) has an extension slide plate (17).

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