Seamless steel tube nondestructive ultrasonic flaw detection equipment and method

Abstract

The invention relates to the technical field of metal material detection, and discloses seamless steel tube nondestructive ultrasonic flaw detection equipment and method.The equipment comprises a base, an ultrasonic generator, an ultrasonic flaw detection device and an ultrasonic flaw detection device, the driving mechanism is used for driving the adjusting mechanism to move, and the transducer is used for projecting ultrasonic waves to the seamless steel pipe and receiving echoes; the control panel is used for driving the ultrasonic generator to generate ultrasonic waves and receiving and displaying echoes; the power mechanism is located in the base and used for driving the seamless steel pipe to rotate. The driving mechanism drives the adjusting mechanism and the transducer to reciprocate, so that the transducer covers the full length of the seamless steel tube. The power mechanism drives the steel pipe to rotate, so that the outer wall of the steel pipe passes through the lower part of the transducer to realize full-area coverage detection. The ultrasonic generator is matched with the transducer, and the detection result is displayed on the control panel in real time, so that the detection precision and efficiency are greatly improved, and meanwhile, nondestructive detection is realized.

Description

Technical Field

[0001] The invention relates to the technical field of metal material detection, in particular to a non-destructive ultrasonic flaw detection device and method for seamless steel pipes. Background Art

[0002] At present, in industrial production, seamless steel pipes are widely used in high-pressure and high-temperature environments, so their quality requirements are extremely strict. Traditional detection methods include magnetic particle detection, eddy current detection and radiographic detection. Although these methods can achieve a certain degree of defect detection, they have many limitations in terms of accuracy, efficiency and safety. Magnetic particle testing: By applying a magnetic field to the surface of the object being tested and spreading iron powder on it, the internal defects are judged by observing the distribution of the iron powder. This method is simple and easy to use, but it is only suitable for the detection of surface or near-surface defects, and cannot effectively identify deeply buried defects; Eddy current testing: Using the principle of electromagnetic induction, internal defects are detected by generating changes in eddy currents on the object being tested. This method can detect defects of a certain depth, but its ability to detect deep defects in thick-walled pipes is limited; Radiographic testing: X-rays or gamma rays penetrate the object to be tested, and internal defects are detected based on the changes in the intensity of the rays. This method has high detection accuracy, but there is a risk of radioactive contamination, and the operation is complex and costly; Ultrasonic testing: This method detects internal defects by emitting high-frequency sound waves into the object being tested and receiving the reflected signals. This method has high detection sensitivity and resolution, but traditional ultrasonic testing equipment needs to be improved in terms of automation and detection speed. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a non-destructive ultrasonic flaw detection device and method for seamless steel pipes, which solves the problems in the prior art that magnetic particle testing and eddy current testing of seamless steel pipes are difficult to find deep defects, X-ray testing has radiation hazards and is complicated to operate and costly, and traditional ultrasonic testing has a low degree of automation and slow detection speed.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a non-destructive ultrasonic flaw detection device for seamless steel pipes, comprising: A base, inside of which an ultrasonic generator for generating ultrasonic waves is installed, and the middle part is used to place a seamless steel pipe; A driving mechanism, which is located on the top of the base and is used to drive the adjustment mechanism to move. A transducer is installed inside the adjustment mechanism. The transducer is connected to an ultrasonic generator and is used to project ultrasonic waves to the seamless steel pipe and receive echoes. A control panel, which is movably mounted outside the base and is used to drive the ultrasonic generator to generate ultrasonic waves and is also used to receive and display echoes; The power mechanism is located inside the base and is used to drive the seamless steel pipe to rotate.

[0005] Preferably, the driving mechanism includes a motor 1, a threaded rod is installed at the output end of the motor 1, the external thread of the threaded rod is connected to a base, the base is slidably connected to the inner top of the base, a bracket is installed on the top of the base, and the adjustment structure is located inside the bracket.

[0006] Preferably, the adjustment structure includes a sliding seat, which is slidably connected to the inside of the bracket, a clamping rod 1 is fixedly connected to one side of the sliding seat, a nut 1 is threadedly connected to the outside of the clamping rod 1, one side of the nut 1 contacts with one side of the bracket, a clamping plate 1 is fixedly connected to the top surface of the sliding seat, a clamping plate 2 is provided on one side of the clamping plate 1, a clamping rod 2 is fixedly connected to the outer side of the middle part of one side of the clamping plate 1, the clamping rod 2 passes through the outer side of the middle part of the clamping plate 2, the outer wall of the clamping rod 2 is threadedly connected to the nut 2, one side of the nut 2 contacts with one side of the clamping plate 2, and the transducer passes through between the clamping plates 2 and 1 and the middle part of the sliding seat.

[0007] Preferably, a conveying mechanism is provided inside the base, and the conveying mechanism includes an electric hydraulic pump, the electric hydraulic pump is fixed to the inner bottom of the base, a partition is fixedly connected to the middle of the base, the output end of the electric hydraulic pump is connected to a support plate, the support plate is located on the top surface of the partition, a connecting rod is fixedly connected to the top surface of the support plate, a support frame is fixedly connected to the top of the connecting rod, a support frame is fixedly connected to a plurality of rollers installed inside the support frame, a sprocket is installed on one side of the plurality of rollers, the plurality of sprockets are connected by a chain, and a second motor is fixedly connected to one side of the outer wall of the support frame, and the output end of the second motor is fixedly connected to a roller.

[0008] Preferably, support frames and rollers are provided on both sides of the top surface of the support plate, and the rollers on both sides are distributed in a V shape for contacting the bottom of the seamless steel pipe, and a guide rod is fixedly connected to the bottom surface of the support plate, and the guide rod passes through the partition.

[0009] Preferably, the power mechanism includes a motor three, and the motor three is installed on one side of the middle part of the bottom surface of the partition. The output end of the motor three is fixedly connected to a driving wheel, and two supporting rollers are arranged between the rotating rollers on both sides. The two supporting rollers are rotatably connected to the inside of the base, and one end of the two supporting rollers is fixedly connected to a driven wheel, the two driven wheels and the driving wheel are connected by belts, and a plurality of anti-slip rings are installed in the middle of the two supporting rollers.

[0010] A method for nondestructive ultrasonic flaw detection of seamless steel pipes, comprising the following steps: (a) Feeding: Drive the electric hydraulic pump to extend the output end to lift the support plate, support frame and roller, so that the middle of the outer wall of the roller is higher than the top surface of the support roller. At this time, place the seamless steel pipe on the roller, drive motor 2 to drive a roller and a sprocket to rotate, and use the chain to drive multiple sprockets and rollers to rotate at the same time. After the seamless steel pipe is moved to the bottom of the bracket, drive the electric hydraulic pump to retract the output end so that the middle of the outer wall of the roller is lower than the top surface of the support roller, and use the support roller to support the seamless steel pipe; (b) Equipment turning on: Using the control panel, the ultrasonic generator is turned on to run and generate ultrasonic waves, which are then emitted from the transducer and pass through the seamless steel pipe, and the transducer is used to receive the echo and transmit it to the control panel for display; (c) Coverage detection: The drive motor 1 drives the threaded rod to rotate back and forth, and the base drives the bracket to make the transducer move back and forth outside the seamless steel pipe; the drive motor 3 drives the driving wheel to rotate, and the belt drives the two driven wheels and the support roller to rotate at the same time, thereby driving the seamless steel pipe to rotate, so that the ultrasonic wave generated by the transducer gradually covers the outer wall of the seamless steel pipe; (d) Discharging: After the inspection is completed, stop motor 1 and motor 3, drive the electric hydraulic pump to lift the roller to support the seamless steel pipe, and then drive motor 2 to drive the roller to rotate and discharge the seamless steel pipe; (e) Continuous operation: After the seamless steel pipe is discharged, steps (a), (b), (c), and (d) are repeated in sequence to carry out continuous operation.

[0011] Preferably, before step (a), the slide can be moved inside the bracket by rotating nut one to move it away from the bracket, thereby adjusting the distance between two adjacent transducers. After reversing nut one, the position of the slide inside the bracket can be locked.

[0012] Preferably, after the distance between two adjacent transducers is adjusted, nut two can also be rotated, at which time clamp one and clamp two are separated, and then the transducer is pulled to slide in the slide seat. Reversing nut two can squeeze clamp two close to clamp one and then clamp the transducer, thereby adjusting the distance between the bottom of the transducer and the seamless steel pipe.

[0013] Preferably, a data acquisition system for collecting and processing echo data received by the transducer is provided inside the control panel, and the data acquisition system includes a high-speed analog-to-digital converter and a digital signal processor, wherein the high-speed analog-to-digital converter is used to convert the echo data into a digital signal, and the digital signal processor is used to pre-process the digital signal and extract characteristic information, and form a defect map, and finally display the defects inside the seamless steel pipe in real time on the control panel.

[0014] The present invention provides a non-destructive ultrasonic flaw detection device and method for seamless steel pipes, which has the following beneficial effects: 1. The present invention drives the adjustment mechanism and the transducer to move back and forth through the driving mechanism, so that the movement trajectory of the transducer can cover the entire length of the seamless steel pipe. The power mechanism is used to drive the seamless steel pipe to rotate, so that the outside of the steel pipe passes under the transducer, thereby achieving full-area coverage detection of the outer wall of the seamless steel pipe. The detection results are displayed on the control panel through the ultrasonic generator and the transducer, which not only improves the accuracy and efficiency of the detection, but also achieves a non-destructive detection effect.

[0015] 2. The present invention can adjust the spacing between adjacent transducers by adjusting the position of the nut and the slide, and lock their positions by reverse operation to ensure the stability of the transducer during the detection process. At the same time, by adjusting the nut in the clamping plate structure, the spacing between the transducer and the steel pipe can be flexibly adjusted to meet the detection requirements of seamless steel pipes of different diameters. This enables the device to adapt to steel pipes of various specifications, enhancing the applicability and versatility of the device.

[0016] 3. The present invention drives the roller to lift the seamless steel pipe through a hydraulic pump, cooperates with the motor to drive the roller and sprocket to rotate, and realizes the rotation of multiple groups of rollers through chains, so as to transport the seamless steel pipe to the working position. After the inspection is completed, the roller can also transport the seamless steel pipe out of the equipment to realize the automatic loading and unloading operation of the steel pipe. Therefore, manual operation is greatly reduced, the continuity of inspection is achieved, and the operation efficiency of the equipment is greatly improved, which is suitable for large-scale seamless steel pipe inspection needs.

[0017] 4. The present invention uses the cooperation of an ultrasonic generator and a transducer to allow ultrasonic waves to penetrate seamless steel pipes. When the ultrasonic waves encounter defects or boundaries inside the steel pipe, part of the signal will be reflected back to the transducer and displayed on the control panel in real time. Therefore, it can avoid the problem of magnetic particle detection and eddy current detection in existing methods, which makes it difficult to find deep-seated defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the base of the present invention; Figure 3 It is a schematic diagram of the structure of the partition part of the present invention; Figure 4 It is a partial structural schematic diagram of the conveying mechanism of the present invention; Figure 5 This is a diagram showing the split structure of the motor of the present invention; Figure 6 This is a partial structural diagram of the power mechanism of the present invention; Figure 7 It is a schematic diagram of the partial structure of the driving mechanism of the present invention; Figure 8 It is a partial structural exploded diagram of the regulating mechanism of the present invention; Fig. 9 This is a diagram showing the two-part structure of the splint of the present invention.

[0019] Among them, 1. base; 11. partition; 2. ultrasonic generator; 3. driving mechanism; 31. motor 1; 32. threaded rod; 33. base; 34. bracket; 4. adjustment mechanism; 41. slide; 42. clamping rod 1; 43. nut 1; 44. clamping plate 1; 45. clamping rod 2; 46. clamping plate 2; 47. nut 2; 5. transducer; 6. control panel; 7. conveying mechanism; 71. electric hydraulic pump; 72. support plate; 73. connecting rod; 74. support frame; 75. motor 2; 76. sprocket; 77. roller; 78. chain; 79. guide rod; 8. power mechanism; 81. motor 3; 82. driving wheel; 83. belt; 84. support roller; 85. driven wheel; 86. anti-slip ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In order to better understand the present invention, the above contents are described in detail below in conjunction with specific embodiments.

[0022] Please see attached Figure 1 and attached Figure 2 The embodiment of the present invention provides a nondestructive ultrasonic flaw detection device for seamless steel pipes, including: a base 1, an ultrasonic generator 2 for generating ultrasonic waves is installed inside the base 1, and the middle part is used to place the seamless steel pipe; a driving mechanism 3, which is located at the top of the base 1 and is used to drive the adjustment mechanism 4 to move, and a transducer 5 is installed inside the adjustment mechanism 4, and the transducer 5 is connected to the ultrasonic generator 2, and is used to project ultrasonic waves to the seamless steel pipe and receive echoes; a control panel 6, which is movably installed outside the base 1, and is used to drive the ultrasonic generator 2 to generate ultrasonic waves, and is also used to receive and display echoes; a power mechanism 8, which is located inside the base 1 and is used to drive the seamless steel pipe to rotate.

[0023] In this embodiment, the driving mechanism 3 can drive the adjusting mechanism 4 to move back and forth, thereby mobilizing the transducer 5 to move back and forth, so that the movement trajectory of the transducer 5 covers the length of the seamless steel pipe, and then the power mechanism 8 is used to drive the seamless steel pipe to rotate, so that the outside of the seamless steel pipe can pass under the transducer 5, thereby achieving full area coverage of the seamless steel pipe, and through the cooperation between the ultrasonic generator 2 and the transducer 5, the ultrasonic wave can penetrate the seamless steel pipe. When the ultrasonic wave encounters internal defects or boundaries of the steel pipe, part of the signal is reflected back to the transducer 5, and the transducer 5 will display the received echo signal in real time on the control panel 66.

[0024] Please see attached Figure 7 and attached Figure 8 The driving mechanism 3 includes a motor 31, a threaded rod 32 is installed at the output end of the motor 31, the external thread of the threaded rod 32 is connected to a base 33, the base 33 is slidably connected to the inner top of the base 1, a bracket 34 is installed on the top of the base 33, and the adjustment structure is located inside the bracket 34.

[0025] In this embodiment, the threaded rod 32 can be driven to rotate by driving the motor 31, and the threaded rod 32 can drive the base 33 to slide on the inner top of the base 1, thereby driving the bracket 34, the adjustment mechanism 4 and the transducer 5 to move back and forth, so as to achieve the purpose of making the path of the transducer 5 cover the length of the seamless steel pipe.

[0026] Please see attached Figure 8 and attached Fig. 9 The adjustment structure includes a slide 41, which is slidably connected to the inside of the bracket 34, and a clamping rod 42 is fixedly connected to one side of the slide 41. The external thread of the clamping rod 42 is connected to a nut 43, and one side of the nut 43 contacts one side of the bracket 34. A clamping plate 44 is fixedly connected to the top surface of the slide 41, and a clamping plate 2 46 is provided on one side of the clamping plate 44. A clamping rod 2 45 is fixedly connected to the outer side of the middle part of one side of the clamping plate 44, and the clamping rod 2 45 passes through the outer side of the middle part of the clamping plate 2 46. The outer wall of the clamping rod 2 45 is threadedly connected to a nut 2 47, and one side of the nut 2 47 contacts one side of the clamping plate 2 46, and the transducer 5 passes through the space between the clamping plate 2 46 and the clamping plate 1 44 and the middle part of the slide 41.

[0027] In this embodiment, by rotating nut 1 43 and then moving slide 41, the slide 41 can be made to slide inside the bracket 34, so as to adjust the distance between two adjacent transducers 5. After reversing nut 1 43, the position of slide 41 inside bracket 34 can be locked. By rotating nut 2 47 to move it away from clamp 2 46, clamp 1 44 and clamp 2 46 will be separated. At this time, transducer 5 can be pulled to slide inside slide 41. After reversing nut 2 47, clamp 2 46 can be squeezed close to clamp 1 44. At this time, transducer 5 can be clamped, so as to achieve the purpose of adjusting the distance between the bottom of transducer 5 and seamless steel pipe, and then seamless steel pipes of different diameters can be detected, thereby improving the applicability of the device.

[0028] Please see attached Figure 3 -Attached Figure 5 A conveying mechanism 7 is provided inside the base 1, and the conveying mechanism 7 includes an electric hydraulic pump 71, which is fixed to the inner bottom of the base 1, and a partition 11 is fixedly connected to the middle of the base 1. The output end of the electric hydraulic pump 71 is connected to a support plate 72, and the support plate 72 is located on the top surface of the partition 11. A connecting rod 73 is fixedly connected to the top surface of the support plate 72, and a supporting frame 74 is fixedly connected to the top of the connecting rod 73. A plurality of rollers 77 are installed inside the supporting frame 74, and a sprocket 76 is installed on one side of the plurality of rollers 77. The plurality of sprockets 76 are connected by a chain 78, and a motor 2 75 is fixedly connected to one side of the outer wall of the supporting frame 74, and the output end of the motor 2 75 is fixedly connected to a roller 77. A support frame 74 and rollers 77 are provided on both sides of the top surface of the support plate 72, and the rollers 77 on both sides are distributed in a V shape for contacting the bottom of the seamless steel pipe. A guide rod 79 is fixedly connected to the bottom surface of the support plate 72, and the guide rod 79 passes through the partition 11.

[0029] In this embodiment, the roller 77 can be lifted up by using the electric hydraulic pump 71 so that it is higher than the top surface of the support roller 84. At this time, the roller 77 can be used to support the seamless steel pipe. After driving the motor 75, a roller 77 and a sprocket 76 can be driven to rotate. Through the cooperation of the chain 78, multiple sprockets 76 and rollers 77 are driven to rotate. Therefore, the seamless steel pipe can be transported for inspection. By arranging the rollers 77 on both sides in a V shape, the rollers 77 can support the seamless steel pipe. When the inspection is completed, the rollers 77 can be used to transport it out of the inspection equipment. Therefore, the seamless steel pipe can be automatically and continuously operated, thereby greatly improving the inspection efficiency.

[0030] Please see attached Figure 2 , Attachment Figure 3 and attached Figure 6The power mechanism 8 includes a motor 3 81, which is installed on one side of the middle part of the bottom surface of the partition 11. The output end of the motor 3 81 is fixedly connected to a driving wheel 82. Two support rollers 84 are arranged between the rollers 77 on both sides. The two support rollers 84 are rotatably connected to the inside of the base 1, and one end of the two support rollers 84 is fixedly connected to a driven wheel 85. The two driven wheels 85 and the driving wheel 82 are connected by a belt 83, and a plurality of anti-slip rings 86 are installed in the middle of the two support rollers 84.

[0031] In this embodiment, the driving motor 81 can drive the active wheel 82 to rotate, and the belt 83 can be used to transmit the power of the active wheel 82, thereby driving the two driven wheels 85 to rotate at the same time, so that the two support rollers 84 can rotate at the same time, thereby realizing the rotation of the seamless steel pipe, and an anti-skid ring 86 is also provided on the support roller 84. The anti-skid ring 86 can be made of natural rubber material, and its high friction coefficient, good elasticity and excellent anti-skid performance can be used to avoid slipping, which may cause the support roller 84 to rotate but the seamless steel pipe does not rotate, thereby ensuring the smooth operation of the detection equipment.

[0032] A method for nondestructive ultrasonic flaw detection of seamless steel pipes, comprising the following steps: (a) Feeding: Drive the electric hydraulic pump 71 to extend the output end to lift the support plate 72, the support frame 74 and the roller 77, so that the middle of the outer wall of the roller 77 is higher than the top surface of the support roller 84. At this time, place the seamless steel pipe on the roller 77, drive the motor 2 75 to drive a roller 77 and a sprocket 76 to rotate, and use the chain 78 to simultaneously drive multiple sprockets 76 and rollers 77 to rotate. After the seamless steel pipe is moved to the bottom of the bracket 34, drive the electric hydraulic pump 71 to retract the output end so that the middle of the outer wall of the roller 77 is lower than the top surface of the support roller 84, and use the support roller 84 to support the seamless steel pipe; (b) Equipment turned on: The control panel 6 is used to turn on the ultrasonic generator to operate and generate ultrasonic waves, which are then emitted from the transducer 5 and pass through the seamless steel pipe, and the transducer 5 receives the echo and transmits it to the control panel 6 for display; (c) Coverage detection: The drive motor 1 31 drives the threaded rod 32 to rotate back and forth, and the base 33 drives the bracket 34 to make the transducer 5 reciprocate outside the seamless steel pipe; the drive motor 3 81 drives the driving wheel 82 to rotate, and the belt 83 drives the two driven wheels 85 and the support roller 84 to rotate at the same time, thereby driving the seamless steel pipe to rotate, so that the ultrasonic wave generated by the transducer 5 gradually covers the outer wall of the seamless steel pipe; (d) Discharging: After the inspection is completed, the motor 1 31 and the motor 3 81 are stopped, and the electric hydraulic pump 71 is driven to lift the roller 77 to support the seamless steel pipe, and then the motor 2 75 is driven to drive the roller 77 to rotate to discharge the seamless steel pipe; (e) Continuous operation: After the seamless steel pipe is discharged, steps (a), (b), (c), and (d) are repeated in sequence to carry out continuous operation.

[0033] Before step (a), by rotating nut 1 43 to move it away from the bracket 34, the slide 41 can be moved to slide inside the bracket 34, thereby adjusting the distance between two adjacent transducers 5. After reversing nut 1 43, the position of the slide 41 inside the bracket 34 can be locked.

[0034] After the distance between two adjacent transducers 5 is adjusted, nut 2 47 can also be rotated. At this time, clamp 1 44 and clamp 2 46 are separated, and then the transducer 5 is pulled to slide in the slide 41. Reversing nut 2 47 can squeeze clamp 2 46 close to clamp 1 44 and then clamp the transducer 5, so as to adjust the distance between the bottom of the transducer 5 and the seamless steel pipe.

[0035] A data acquisition system for collecting and processing echo data received by the transducer 5 is provided inside the control panel 6. The data acquisition system includes a high-speed analog-to-digital converter and a digital signal processor. The high-speed analog-to-digital converter is used to convert the echo data into a digital signal. The digital signal processor is used to pre-process the digital signal and extract characteristic information, and form a defect map, and finally display the defects inside the seamless steel pipe in real time on the control panel 6.

[0036] Working principle: when in use, first drive the output end of the electric hydraulic pump 71 to lift the support plate 72, the support frame 74 and the roller 77, and make the middle part of the outer wall of the roller 77 higher than the top surface of the support roller 84. At this time, place the seamless steel pipe on the roller 77, and then drive the motor 2 75 to run. The motor 2 75 can drive a sprocket 76 and a roller 77 to rotate. When a sprocket 76 rotates, the chain 78 can simultaneously drive multiple sprockets 76 to rotate, thereby achieving the purpose of simultaneously driving multiple rollers 77 to rotate, and then the seamless steel pipe can be transported to the detection position, that is, directly below the bracket 34, and then drive the hydraulic pump to retract the output end. At this time, the height of the roller 77 drops and is lower than the support roller 84. At this time, the bottom of the seamless steel pipe will contact the support roller 84, and then the support roller 84 is used to support the seamless steel pipe; Then, the ultrasonic generator 2 is started by using the control panel 6. At this time, the ultrasonic generator 2 generates a high-frequency electrical signal and transmits it to the transducer 5. The transducer 5 converts the electrical signal into an ultrasonic signal and projects it onto the seamless steel pipe. When the ultrasonic wave encounters a defect or boundary inside the steel pipe, part of the signal is reflected back to the transducer 5. After receiving the echo signal, the transducer 5 transmits it to the data acquisition system. Then, the high-speed analog-to-digital converter converts the electrical signal into a digital signal. Subsequently, the digital signal processor analyzes and processes the digital signal and generates a defect map inside the seamless steel pipe, which is finally displayed in real time on the control panel 6. During the inspection, the motor 31 is driven to run, and the motor 31 can drive the threaded rod 32 to rotate. At this time, the threaded rod 32 can drive the base 33 to slide on the inner bottom of the base 1, thereby driving the bracket 34 and the transducer 5 to move along the central axis direction of the seamless steel pipe. After the motor 31 is driven to rotate forward and reverse, the transducer 5 can be driven to reciprocate, ensuring that the inspection area covers the entire length of the seamless steel pipe. And while the transducer 5 moves back and forth, by driving the motor 3 81, the motor 3 81 can drive the driving wheel 82 to rotate, and the driving wheel 82 can drive the belt 83 to run, thereby driving the two driven wheels 85 and the support roller 84 to rotate at the same time. Since the gravity of the seamless steel pipe acts on the support roller 84, the steel pipe can be rotated; at this time, the ultrasonic signal of the transducer 5 can gradually cover the entire outer surface of the seamless steel pipe, realizing all-round detection; When the inspection is completed, first stop the motor 1 31 and the motor 3 81, and then drive the electric hydraulic pump 71 to lift the roller 77 so that the roller 77 contacts the seamless steel pipe. At this time, the seamless steel pipe is separated from the supporting roller 84, and then drive the motor 2 75 to drive the roller 77 to rotate, and the seamless steel pipe is transported out of the base 1. Then, the next seamless steel pipe to be inspected can be placed on the roller 77, and then the above steps can be repeated to realize the continuous inspection of the seamless steel pipe. Before the detection, by turning nut 1 43 to move it away from the bracket 34, the slide 41 can be moved to slide inside the bracket 34, so as to adjust the distance between two adjacent transducers 5. After reversing nut 1 43, the position of slide 41 inside the bracket 34 can be locked, and then nut 2 47 can be turned to move it away from clamp 2 46. At this time, clamp 1 44 and clamp 2 46 will be separated, and then the transducer 5 can be pulled to slide in the slide 41. After reversing nut 2 47, clamp 2 46 can be squeezed close to clamp 1 44, and the transducer 5 can be clamped. At this time, the purpose of adjusting the distance between the bottom of the transducer 5 and the seamless steel pipe can be achieved, so that seamless steel pipes of different diameters can be detected, thereby improving the applicability of the device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-destructive ultrasonic flaw detection device for seamless steel pipes, characterized in that: include: A base (1) having an ultrasonic generator (2) installed therein for generating ultrasonic waves, and a middle portion for placing a seamless steel pipe; A driving mechanism (3) is located on the top of the base (1) and is used to drive the adjusting mechanism (4) to move. A transducer (5) is installed inside the adjusting mechanism (4). The transducer (5) is connected to the ultrasonic generator (2) and is used to project ultrasonic waves onto the seamless steel pipe and receive echoes. A control panel (6) movably mounted outside the base (1) and used to drive the ultrasonic generator (2) to generate ultrasonic waves and to receive and display echoes; A power mechanism (8) is located inside the base (1) and is used to drive the seamless steel pipe to rotate.

2. The nondestructive ultrasonic flaw detection equipment for seamless steel pipe according to claim 1, characterized in that: The driving mechanism (3) comprises a motor 1 (31), a threaded rod (32) being mounted on the output end of the motor 1 (31), the threaded outer end of the threaded rod (32) being threadedly connected to a base (33), the base (33) being slidably connected to the inner top of the base (1), a bracket (34) being mounted on the top of the base (33), and the adjustment structure (4) being located inside the bracket (34).

3. The nondestructive ultrasonic flaw detection equipment for seamless steel pipe according to claim 2, characterized in that: The adjustment structure (4) comprises a slide seat (41), the slide seat (41) is slidably connected to the inside of the bracket (34), a clamping rod (42) is fixedly connected to one side of the slide seat (41), a nut (43) is externally threadedly connected to the clamping rod (42), one side of the nut (43) contacts one side of the bracket (34), and a clamping plate (44) is fixedly connected to the top surface of the slide seat (41), and one side of the clamping plate (44) is provided with A second clamping plate (46) is provided, and a second clamping rod (45) is fixedly connected to the outer middle part of one side of the first clamping plate (44), and the second clamping rod (45) passes through the outer middle part of the second clamping plate (46). The outer wall of the second clamping rod (45) is threadedly connected to a second nut (47), and one side of the second nut (47) contacts one side of the second clamping plate (46), and the transducer (5) passes through the middle of the slide seat (41) between the second clamping plate (46) and the first clamping plate (44).

4. The nondestructive ultrasonic flaw detection equipment for seamless steel pipe according to claim 1, characterized in that: A conveying mechanism (7) is arranged inside the base (1), and the conveying mechanism (7) comprises an electric hydraulic pump (71), the electric hydraulic pump (71) is fixed to the inner bottom of the base (1), a partition (11) is fixedly connected to the middle of the base (1), an output end of the electric hydraulic pump (71) is connected to a support plate (72), the support plate (72) is located on the top surface of the partition (11), a connecting rod (73) is fixedly connected to the top surface of the support plate (72), a supporting frame (74) is fixedly connected to the top of the connecting rod (73), a plurality of rollers (77) are installed inside the supporting frame (74), a sprocket (76) is installed on one side of the plurality of rollers (77), and the plurality of sprockets (76) are connected by a chain (78), and a second motor (75) is fixedly connected to one side of the outer wall of the supporting frame (74), and the output end of the second motor (75) is fixedly connected to a roller (77).

5. The nondestructive ultrasonic flaw detection equipment for seamless steel pipe according to claim 4, characterized in that: Support frames (74) and rollers (77) are provided on both sides of the top surface of the support plate (72), and the rollers (77) on both sides are arranged in a V-shape for contacting the bottom of the seamless steel pipe. A guide rod (79) is fixedly connected to the bottom surface of the support plate (72), and the guide rod (79) passes through the partition plate (11).

6. The nondestructive ultrasonic flaw detection equipment for seamless steel pipe according to claim 5, characterized in that: The power mechanism (8) comprises a motor three (81), the motor three (81) being mounted on one side of the middle of the bottom surface of the partition (11), the output end of the motor three (81) being fixedly connected to a driving wheel (82), two supporting rollers (84) being arranged between the rotating rollers (77) on both sides, the two supporting rollers (84) being rotatably connected to the inside of the base (1), and one end of the two supporting rollers (84) being fixedly connected to a driven wheel (85), the two driven wheels (85) and the driving wheel (82) being connected via a belt (83), and a plurality of anti-slip rings (86) being arranged in the middle of the two supporting rollers (84).

7. A method for nondestructive ultrasonic flaw detection of seamless steel pipes, based on a nondestructive ultrasonic flaw detection device for seamless steel pipes according to any one of claims 1 to 6, characterized in that: The following steps are involved: (a) Feeding: driving the electric hydraulic pump (71) to extend the output end to lift the support plate (72), the support frame (74) and the roller (77) so that the middle of the outer wall of the roller (77) is higher than the top surface of the support roller (84). At this time, the seamless steel pipe is placed on the roller (77). The second driving motor (75) drives a roller (77) and a sprocket (76) to rotate. The chain (78) drives multiple sprockets (76) and the roller (77) to rotate at the same time. After the seamless steel pipe is moved to the bottom of the bracket (34), the electric hydraulic pump (71) is driven to retract the output end so that the middle of the outer wall of the roller (77) is lower than the top surface of the support roller (84). The support roller (84) supports the seamless steel pipe; (b) Turning on the equipment: using the control panel (6) to turn on the ultrasonic generator (2) to operate and generate ultrasonic waves, which are then emitted from the transducer (5) and pass through the seamless steel pipe, and the transducer (5) receives the echo and transmits it to the control panel (6) for display; (c) Coverage detection: the drive motor 1 (31) drives the threaded rod (32) to rotate back and forth, and the base (33) drives the bracket (34) to make the transducer (5) move back and forth outside the seamless steel pipe; Cooperating with the driving motor 3 (81) to drive the driving wheel (82) to rotate, the belt (83) is used to simultaneously drive the two driven wheels (85) and the supporting roller (84) to rotate, thereby driving the seamless steel pipe to rotate, so that the ultrasonic wave generated by the transducer (5) gradually covers the outer wall of the seamless steel pipe; (d) Discharging: After the inspection is completed, the motor 1 (31) and the motor 3 (81) are stopped, and the electric hydraulic pump (71) is driven to lift the roller (77) to support the seamless steel pipe, and then the motor 2 (75) is driven to drive the roller (77) to rotate and discharge the seamless steel pipe; (e) Continuous operation: After the seamless steel pipe is discharged, steps (a), (b), (c), and (d) are repeated in sequence to carry out continuous operation.

8. The method for nondestructive ultrasonic flaw detection of seamless steel pipe according to claim 7, characterized in that: Before step (a), by rotating nut 1 (43) to move it away from the bracket (34), the slide seat (41) can be moved to slide inside the bracket (34), thereby adjusting the distance between two adjacent transducers (5). After reversing nut 1 (43), the position of the slide seat (41) inside the bracket (34) can be locked.

9. The method for nondestructive ultrasonic flaw detection of seamless steel pipe according to claim 8, characterized in that: After the spacing between two adjacent transducers (5) is adjusted, the second nut (47) can be rotated, and the first clamping plate (44) and the second clamping plate (46) are separated. Then, the transducer (5) is pulled to slide in the slide seat (41). The second nut (47) is reversed to squeeze the second clamping plate (46) close to the first clamping plate (44) and thus clamp the transducer (5), thereby adjusting the spacing between the bottom of the transducer (5) and the seamless steel pipe.

10. The method for nondestructive ultrasonic flaw detection of seamless steel pipe according to claim 7, characterized in that: The control panel (6) is internally provided with a data acquisition system for collecting and processing echo data received by the transducer (5), wherein the data acquisition system comprises a high-speed analog-to-digital converter and a digital signal processor, wherein the high-speed analog-to-digital converter is used to convert the echo data into a digital signal, and the digital signal processor is used to pre-process the digital signal and extract characteristic information, and form a defect map, and finally the defects inside the seamless steel pipe are displayed in real time on the control panel (6).

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