An ultrasonic crack detection apparatus for stainless steel pipes

Abstract

The application relates to an ultrasonic crack detection device for a stainless steel pipe, which comprises a workbench, a rotating device, a moving device, a fine adjustment device and an ultrasonic detection device; the workbench is used for placing a workpiece; the rotating device is used for driving the workpiece on the workbench to rotate around the axis of the workpiece; the fine adjustment device is connected to the moving device; the moving device is used for driving the fine adjustment device to move along the length direction of the workpiece; the ultrasonic detection device is connected to the fine adjustment device; the fine adjustment device is used for adjusting the height and the angle of the ultrasonic detection device; and the ultrasonic detection device is used for detecting the workpiece. Through the arrangement of the workbench, the rotating device, the moving device, the fine adjustment device and the ultrasonic detection device, the detection result of the stainless steel pipe is more comprehensive, and the detection quality of the stainless steel pipe is improved.

Description

Technical Field

[0001] This application relates to the technical field of crack detection equipment, and more specifically, it relates to an ultrasonic crack detection device for stainless steel pipes. Background Technology

[0002] Due to various factors such as raw materials, temperature, equipment, and processes, stainless steel pipes are prone to developing cracks both on their surface and internally, which can affect their performance. Therefore, stainless steel pipes typically undergo crack testing before leaving the factory to ensure quality.

[0003] Traditional stainless steel pipe inspection typically employs eddy current testing or manual handheld ultrasonic testing equipment. Eddy current testing can only detect surface or near-surface cracks, making it difficult to effectively detect internal cracks in stainless steel pipes. Manual handheld ultrasonic testing, on the other hand, cannot comprehensively inspect all parts of the stainless steel pipe, making it prone to errors and omissions. Therefore, both eddy current testing and manual handheld ultrasonic testing suffer from low inspection quality and require improvement. Summary of the Invention

[0004] To improve the detection quality of cracks in stainless steel pipes, this application provides an ultrasonic crack detection device for stainless steel pipes.

[0005] This application provides an ultrasonic crack detection device for stainless steel pipes, which adopts the following technical solution:

[0006] An ultrasonic crack detection device for stainless steel pipes includes a worktable, a rotating device, a moving device, a fine-tuning device, and an ultrasonic detection device.

[0007] The worktable is used to place workpieces, and the rotating device is used to drive the workpieces on the worktable to rotate around their own axis.

[0008] The fine-tuning device is connected to the moving device, and the moving device is used to drive the fine-tuning device to move along the length direction of the workpiece.

[0009] The ultrasonic testing device is connected to a fine-tuning device, which is used to adjust the height and angle of the ultrasonic testing device. The ultrasonic testing device is used to test the workpiece.

[0010] The above technical solution, which includes a worktable, a rotating device, a moving device, a fine-tuning device, and an ultrasonic testing device, allows for better adaptation to different pipe sizes when crack detection is required on stainless steel pipes. The stainless steel pipe is placed on the worktable, and the height and angle of the ultrasonic testing device relative to the pipe are adjusted using the fine-tuning device. Activating the moving and rotating devices allows the rotating device to drive the stainless steel pipe to rotate around its own axis, while the moving device adjusts the relative position of the ultrasonic testing device along the length of the pipe. This enables the ultrasonic testing device to inspect the stainless steel pipe along its length during rotation. Compared to manual inspection, this method is more comprehensive and stable. Compared to eddy current testing, the ultrasonic testing device can also detect internal cracks in the stainless steel pipe, resulting in more comprehensive detection results. Therefore, it improves the quality of crack detection in stainless steel pipes.

[0011] Optionally, the rotating device includes a plurality of rotating components, which are evenly arranged along the length direction on the upper surface of the worktable.

[0012] Each of the rotating components includes a driving roller, a driven roller, and a transmission element for driving the driving roller to rotate, wherein the driving roller is used to drive the workpiece to rotate.

[0013] The above technical solution involves setting up a rotating device comprising several rotating components, including a driving roller, a driven roller, and a transmission component. Since the stainless steel pipe being inspected is relatively long and heavy, to ensure inspection quality, it is necessary to reduce the relative swaying during rotation. Placing the stainless steel pipe on the driving and driven rollers allows them to provide sufficient support while rotating the pipe, reducing relative swaying and improving the stability of the rotation process, thereby enhancing the inspection quality of cracks in the stainless steel pipe.

[0014] Optionally, the moving device includes a gantry, a transmission assembly, a guide assembly, and a drive assembly;

[0015] The transmission assembly includes a transmission screw arranged along the length of the worktable and a sliding block threaded to the transmission screw. The upper end of the sliding block is fixedly connected to the lower end of the gantry frame.

[0016] The guide assembly includes a guide rail arranged along the length of the worktable and a slider slidably connected to the guide rail, wherein the upper end of the slider is fixedly connected to the lower end of the sliding block.

[0017] The drive assembly includes a drive motor for driving the transmission screw to rotate and a coupling, wherein the output shaft of the drive motor is coaxially connected to the transmission screw through the coupling.

[0018] The above technical solution includes a moving device comprising a gantry, a drive assembly, a transmission assembly, and a guide assembly. The gantry slides along the length of the worktable via a drive motor that rotates a transmission screw. This screw transmission offers advantages of high efficiency and precision, allowing for better control of the gantry's position and, consequently, better control of the ultrasonic testing device's position relative to the stainless steel pipe. This facilitates free adjustment of the testing area and improves operational convenience.

[0019] Optionally, the fine-tuning device includes several fine-tuning components, which are arranged sequentially on the gantry along the length of the worktable.

[0020] Each of the aforementioned fine-tuning components includes a drive unit mounted on the gantry, a mounting bracket, and a rotating bracket;

[0021] The output direction of each drive unit is arranged vertically, each mounting bracket is fixedly connected to the output end of the drive unit in the same group, each rotating bracket is rotatably connected to the mounting bracket in the same group, and the rotation axis of each rotating bracket is arranged horizontally and perpendicular to the length direction of the worktable. The rotating bracket is used for mounting the ultrasonic testing device.

[0022] The above technical solution includes a fine-tuning device comprising several fine-tuning components. Each component includes a drive unit mounted on the gantry, a mounting frame, and a rotating frame. The drive unit can adjust the vertical height of the mounting frame and the rotating frame, and the rotating frame can rotate relative to the mounting frame. Since the ultrasonic testing device and the fine-tuning device are interconnected, the height of the ultrasonic testing device can be adjusted by adjusting the vertical height of the mounting frame and the rotating frame, and the angle of the ultrasonic testing device can be adjusted by adjusting the relative angle between the mounting frame and the rotating frame. This allows the ultrasonic testing device to better adapt to stainless steel pipes of different sizes, improving its adaptability.

[0023] Optionally, the ultrasonic testing device includes several ultrasonic testing components, each of which includes a testing housing, several ultrasonic testing probes, and several liquid inlet pipes.

[0024] The detection housings in several ultrasonic detection components are rotatably connected to the rotating frames in several fine-tuning components, and the rotation axis of each detection housing is perpendicular to the rotation axis of the corresponding rotating frame.

[0025] Each of the detection housings is provided with a receiving cavity, the bottom of each receiving cavity is completely extended to the bottom of the corresponding detection housing, and the bottom of each detection housing is provided with an abutment block. The end face of the abutment block away from the detection housing is provided with an abutment arc surface for fitting the surface of the workpiece, and the abutment arc surface is provided with a through groove communicating with the inside of the receiving cavity.

[0026] Several ultrasonic testing probes in the same group are installed inside the receiving cavity and are all oriented towards the opening of the through slot. Several liquid inlet pipes in the same group are used to inject liquid into the receiving cavity.

[0027] The above technical solution establishes an ultrasonic testing device comprising several ultrasonic testing components. Each component includes a testing housing, several ultrasonic testing probes, and several liquid inlet pipes. When a stainless steel pipe needs crack detection, the position and angle of the testing housing relative to the workpiece are adjusted so that the contact arc surface adheres to the surface of the stainless steel pipe. Liquid is injected into the receiving cavity through the liquid inlet pipes, filling the space between the stainless steel pipe surface and the ultrasonic testing probes. The ultrasonic water immersion method is then used to detect cracks in the stainless steel pipe. On one hand, compared to the method where the ultrasonic testing probe directly contacts the stainless steel pipe surface, the ultrasonic water immersion method causes less wear and tear on the ultrasonic testing probes, improving their durability. On the other hand, the liquid filling the receiving cavity and the stainless steel pipe surface flows into the gap between the contact arc surface and the stainless steel pipe surface, lubricating both surfaces, reducing wear on the contact block, and thus improving its durability.

[0028] Optionally, each of the fine-tuning components further includes a first limiting screw connected to the mounting bracket, the first limiting screw being used to abut against the rotating bracket in the same group to limit the rotation angle of the rotating bracket;

[0029] The outer wall of the detection housing is provided with a second limiting screw, which is used to abut against the rotating frame to limit the rotation angle of the detection housing.

[0030] By using the above technical solution, the first limit screw and the second limit screw are set to limit the rotation angle of the rotating frame and the detection housing, so as to avoid the situation that the detection housing and the stainless steel pipe are difficult to align and fit due to excessive rotation of the detection housing and the rotating frame, and improve the adjustment convenience of the contact arc surface to fit the surface of the stainless steel pipe.

[0031] Optionally, the upper surface of the worktable is fixed with an adjustment seat and slidably connected with a sliding seat;

[0032] The adjusting seat is provided with an adjusting screw hole, and an adjusting screw is threadedly connected to the adjusting screw hole. The length direction of the adjusting screw is parallel to the length direction of the worktable.

[0033] One end of the adjusting screw along its length is connected to an adjusting handwheel, which is used to drive the adjusting screw to rotate. The end of the adjusting screw away from the adjusting handwheel is rotatably connected to a sliding seat to drive the sliding seat to slide along the length of the worktable.

[0034] The upper end of the sliding seat is provided with an abutment block, which is used to abut against the workpiece.

[0035] The above technical solution includes a sliding seat, an adjusting screw, an adjusting handwheel, and a stop block. When it is necessary to adjust the position of the stainless steel pipe relative to the worktable, the adjusting handwheel can be rotated to drive the adjusting screw to rotate, causing the sliding seat to slide along the length of the worktable. This, in turn, causes the stop block to move along the length of the worktable, allowing the stop block to push the stainless steel pipe to move on the worktable, thus facilitating the adjustment of the stainless steel pipe's position along the length of the worktable.

[0036] Optionally, the two transmission lead screws are referred to as rod one and rod two. The end of rod one away from the drive motor is coaxially provided with a drive gear. The worktable is rotatably connected to a first intermediate shaft, which is parallel to rod one. The first intermediate shaft is provided with a driven gear that meshes with the drive gear.

[0037] The first intermediate shaft is also provided with a number of synchronization components, the number of which is the same as that of the rotation components and their positions correspond one-to-one;

[0038] Each synchronization component includes a first synchronization bevel gear, a second synchronization bevel gear, a third synchronization bevel gear, and a second intermediate shaft;

[0039] The first synchronous bevel gear is coaxially fixed to the first intermediate shaft, and the second and third synchronous bevel gears are coaxially fixed to both ends of the second intermediate shaft. The second synchronous bevel gear meshes with the first synchronous bevel gear to transmit the power of the intermediate shaft to the third synchronous bevel gear.

[0040] The transmission component is a bevel gear. The transmission component and the drive roller in the same rotating assembly are fixed coaxially. The third synchronous bevel gear in each synchronous assembly meshes with the transmission component in the corresponding rotating assembly.

[0041] The above technical solution incorporates several synchronization components, enabling the rotating device to rotate synchronously during the movement of the moving device. On one hand, if the rotating device fails to rotate while the moving device is carrying the ultrasonic testing device, the crack detection results for the stainless steel pipe will be incomplete, affecting overall testing efficiency. Therefore, by using several synchronization components to achieve synchronous rotation between the rotating and moving devices, the stainless steel pipe can rotate synchronously during the movement of the ultrasonic testing device, reducing the occurrence of the aforementioned situation and improving the crack detection quality of the stainless steel pipe. On the other hand, by rationally setting the transmission ratio between the bevel gears in the synchronization components... This system ensures that during the movement of the ultrasonic testing device, the rotation speed of the stainless steel pipe driven by the rotating device is greater than or equal to the movement speed of the ultrasonic testing device along the length of the stainless steel pipe. Since the ultrasonic testing device includes several ultrasonic testing components arranged along the length of the worktable, these components can form a testing area of ​​a certain length. The time interval during which this testing area completely passes through a section of stainless steel pipe is greater than or equal to the time interval of one full rotation of that section of stainless steel pipe. This allows the ultrasonic testing device to complete the full testing of a stainless steel pipe after moving along its length once, thus improving the testing efficiency of stainless steel pipes.

[0042] In summary, this application includes at least one of the following beneficial technical effects:

[0043] (1) By setting up a workbench, a rotating device, a moving device, a fine-tuning device and an ultrasonic testing device, the height and angle of the ultrasonic testing device relative to the stainless steel pipe can be adjusted by the fine-tuning device, which can better adapt to steel pipes of different sizes. The rotating device can drive the stainless steel pipe to rotate around its own axis. The moving device can adjust the relative position of the ultrasonic testing device to the length of the stainless steel pipe, so that the ultrasonic testing device can detect the stainless steel pipe along the length of the stainless steel pipe during the rotation of the stainless steel pipe, thereby improving the detection quality of cracks in the stainless steel pipe.

[0044] (2) By setting up an ultrasonic testing device including several ultrasonic testing components, each testing component includes a testing housing, several ultrasonic testing probes and several liquid inlet pipes. By adjusting the position and angle of the testing housing relative to the workpiece, the abutting arc surface is made to fit against the surface of the stainless steel pipe. Liquid is injected into the receiving cavity, so that the liquid fills the space between the surface of the stainless steel pipe and the ultrasonic testing probe. The ultrasonic water immersion method is used to detect cracks in the stainless steel pipe. Compared with the testing method where the ultrasonic testing probe directly contacts the surface of the stainless steel pipe, the ultrasonic water immersion method causes less wear and consumption of the ultrasonic testing probe, which can improve the service durability of the ultrasonic testing probe.

[0045] (3) By setting up several synchronization components, the stainless steel pipe can also rotate synchronously through the rotating device during the movement of the ultrasonic testing device, reducing the occurrence of situations where the rotating device does not rotate while the ultrasonic testing device is moving, reducing the impact of such situations on the testing quality and efficiency of the stainless steel pipe, and improving the testing quality and efficiency of crack detection of the stainless steel pipe. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the overall structure of this embodiment.

[0047] Figure 2 This is an exploded view of the overall structure of this embodiment.

[0048] Figure 3 This is a partial structural diagram of this embodiment.

[0049] Figure 4 This is a cross-sectional view of the overall structure of this embodiment.

[0050] Figure 5 This is a partial structural diagram of this embodiment, used to illustrate the structure of the ultrasonic testing device and the fine-tuning device.

[0051] Figure 6 This is a magnified schematic diagram of a portion of the structure of the fine-tuning component and the ultrasonic detection component in this embodiment.

[0052] Figure 7 This is a schematic diagram of the structure of the fine-tuning component and the ultrasonic detection component in this embodiment.

[0053] Figure 8 This is a schematic diagram of the structure of the fine-tuning component and the ultrasonic detection component in this embodiment, used to illustrate the structure of the contact arc surface.

[0054] Reference numerals: 1. Worktable; 2. Moving device; 201. Gantry frame; 202. Drive assembly; 2021. Drive motor; 2022. Coupling; 203. Transmission assembly; 2031. Transmission screw; 2032. Sliding block; 2033. Threaded hole; 204. Guide assembly; 2041. Guide rail; 2042. Slider; 3. Rotating device; 301. Rotating assembly; 3011. Drive roller; 3012. Driven roller; 3013. Transmission component; 4. Fine-tuning device; 401. Fine-tuning assembly; 4011. Drive component; 4012. Mounting bracket; 4013. Rotating bracket; 4014. First limit screw; 4015. Slide rail; 4016. Buffer spring; 5. Ultrasonic detection device; 501. Ultrasonic testing assembly; 5011, testing housing; 5012, ultrasonic testing probe; 5013, liquid inlet pipe; 5014, second limit screw; 5015, receiving cavity; 5016, abutment block; 5017, abutment arc surface; 5018, through groove; 5019, mounting part; 5020, flow guide cavity; 5021, flow guide port; 5022, flow guide plate; 6, first intermediate shaft; 7, driving gear; 8, driven gear; 9, synchronization assembly; 901, first synchronous bevel gear; 902, second synchronous bevel gear; 903, third synchronous bevel gear; 904, second intermediate shaft; 10, adjusting seat; 11, sliding seat; 12, adjusting screw hole; 13, adjusting screw; 14, adjusting handwheel; 15, abutment block. Detailed Implementation

[0055] The present application will be further described in detail below with reference to the accompanying drawings.

[0056] This application discloses an ultrasonic crack detection device for stainless steel pipes.

[0057] Reference Figure 1 It includes a workbench 1, a moving device 2, a rotating device 3, a fine-tuning device 4, and an ultrasonic testing device 5.

[0058] Reference Figure 1 and Figure 2 The mobile device 2 includes a gantry 201, a drive assembly 202, a transmission assembly 203, and a guide assembly 204.

[0059] The guide assembly 204 includes two guide rails 2041 and two sliders 2042 that are slidably connected to the two guide rails 2041 respectively. The two guide rails 2041 are respectively fixed to the two sides of the upper end face of the worktable 1 along the length direction, and each guide rail 2041 is arranged along the length direction of the worktable 1. The sliders 2042 on each guide rail 2041 slide along the length direction of the guide rail 2041.

[0060] The transmission assembly 203 includes two lead screws 2031 and two sliding blocks 2032. The two lead screws 2031 are respectively installed on both sides of the upper end face of the worktable 1 along its length, and each lead screw 2031 can rotate around its own axis. Each sliding block 2032 has a threaded hole 2033, and the axis of each threaded hole 2033 is parallel to the length direction of the worktable 1. The two sliding blocks 2032 are threadedly connected to the two lead screws 2031 through their respective threaded holes 2033.

[0061] The drive assembly 202 includes two drive motors 2021 and two couplings 2022. The two drive motors 2021 are respectively mounted on both sides of the upper end face of the worktable 1 along the length direction, and the two couplings 2022 are coaxially connected to the output shafts of the two drive motors 2021 in a one-to-one correspondence.

[0062] Two lead screws 2031 correspond one-to-one with two drive motors 2021, and one end of each lead screw 2031 in the length direction is coaxially connected to the output shaft of the corresponding drive motor 2021 through a coupling 2022.

[0063] The upper ends of the two sliding blocks 2032 are respectively fixed to the bottom ends of the two vertical beams of the gantry frame 201, and the upper ends of the two sliders 2042 are respectively fixed to the bottom ends of the two sliding blocks 2032. When the gantry frame 201 needs to be moved, the two drive motors 2021 are started at the same time, so that the two transmission screws 2031 rotate synchronously, thereby driving the two sliding blocks 2032 to slide along the length direction on the two guide rails 2041, so that the gantry frame 201 can move along the length direction of the worktable 1.

[0064] Reference Figure 3 and Figure 4 The rotating device 3 includes several rotating components 301, which are evenly arranged along the length of the worktable 1.

[0065] Each rotating assembly 301 includes a driving roller 3011, a driven roller 3012, and a transmission component 3013. The driving roller 3011 is rotatably connected to the worktable 1, and its rotation axis is parallel to the length direction of the worktable 1. The driven roller 3012 is rotatably connected to the worktable 1, and its rotation axis is parallel to the length direction of the worktable 1. The driving roller 3011 and driven roller 3012 in the same rotating assembly 301 are symmetrically distributed about the centerline of the worktable 1 along its length. The upper part of the opposite end faces of the driving roller 3011 and driven roller 3012 in the same rotating assembly 301 is used for placing stainless steel pipes. The transmission component 3013 is a bevel gear, and each transmission component 3013 is coaxially fixed to the driving roller 3011 in the same rotating assembly 301.

[0066] The upper end face of the worktable 1 is also rotatably connected to a first intermediate shaft 6. The first intermediate shaft 6 is arranged along the length direction of the worktable 1, and each of the first intermediate shafts 6 can rotate around its own axis. The first intermediate shaft 6 is located on one side of the worktable 1 along the length direction.

[0067] The two transmission lead screws 2031 are designated as rod one and rod two, respectively, with the first intermediate shaft 6 positioned close to rod one. A driven gear 8 is coaxially fixed to the first intermediate shaft 6, and a driving gear 7 is coaxially fixed to the end of rod one away from the drive motor 2021. The driving gear 7 and the driven gear 8 mesh to drive the intermediate shaft to rotate.

[0068] The first intermediate shaft 6 is axially connected to several synchronization components 9. The number of synchronization components 9 and the rotation components 301 are the same and their positions correspond one-to-one.

[0069] The synchronization assembly 9 includes a first synchronization bevel gear 901, a second synchronization bevel gear 902, a third synchronization bevel gear 903, and a second intermediate shaft 904. The first synchronization bevel gear 901 is coaxially fixed to the first intermediate shaft 6, and the second synchronization bevel gear 902 and the third synchronization bevel gear 903 are coaxially fixed to both ends of the second intermediate shaft 904, respectively. The second intermediate shaft 904 is rotatably connected to the worktable 1, and the axis of the second intermediate shaft 904 is horizontal and perpendicular to the length direction of the worktable 1. The second intermediate shaft 904 can rotate around its own axis.

[0070] Each synchronization component 9 has a first synchronization bevel gear 901 meshing with a second synchronization bevel gear 902, and the axes of the first and second synchronization bevel gears 901 are perpendicular to each other. Each synchronization component 9 has a third synchronization bevel gear 903 meshing with a transmission component 3013 in the corresponding rotation component 301, and the axis of the third synchronization bevel gear 903 is perpendicular to the axis of the transmission component 3013 in the corresponding rotation component 301. In actual use, the first lever drives the drive gear 7 to rotate, the drive gear 7 drives the driven gear 8 to rotate, the driven gear 8 drives the first intermediate shaft 6 to rotate, and the synchronization component 9 transmits the power from the first intermediate shaft 6 to the transmission component 3013 in the corresponding rotation component 301, thereby driving the drive roller 3011 in the corresponding rotation component 301 to rotate, achieving synchronous rotation of the drive roller 3011 when the gantry 201 moves.

[0071] Reference Figure 5 and Figure 6 The fine-tuning device 4 includes several fine-tuning components 401, which are arranged sequentially along the length of the worktable 1 on the gantry 201.

[0072] Each fine-tuning component 401 includes a drive element 4011, a mounting bracket 4012, a rotating bracket 4013, and two first limiting screws 4014. The drive element 4011 is a drive cylinder, which is mounted on the gantry 201, and its output end is vertically downward. The mounting bracket 4012 is fixed to the output end of the drive cylinder, and its vertical position is adjusted by the drive cylinder. The rotating bracket 4013 is rotatably connected to the end of the mounting bracket 4012 away from the drive cylinder, and its rotation axis is horizontal and perpendicular to the length of the worktable 1. The two first limiting screws 4014 are fixed to the end of the mounting bracket 4012 away from the drive cylinder, and are located on the upper end of the rotating bracket 4013, respectively on both sides of the rotation axis of the rotating bracket 4013. The lower end of each first limiting screw 4014 is used to abut against the upper end of the rotating frame 4013 in the same fine-tuning assembly 401, thereby limiting the rotation angle of the rotating frame 4013 and facilitating the fine-tuning of the rotating frame 4013.

[0073] Each fine-tuning component 401 also includes two parallel slide rails 4015 and two buffer springs 4016. Each slide rail 4015 is vertically oriented, and the end of the mounting bracket 4012 in the same fine-tuning component 401, away from the rotating bracket 4013, is slidably connected to the two slide rails 4015. The two buffer springs 4016 are located on the outer sides of the two slide rails 4015, and each buffer spring 4016 is vertically oriented. Each buffer spring 4016 is fixed at one end to the gantry 201 and at the other end to the mounting bracket 4012, and is used to reduce the downward sliding speed of the mounting bracket 4012 in the vertical direction.

[0074] Alternatively, the drive unit 4011 can also be a linear module.

[0075] The ultrasonic testing device 5 includes several ultrasonic testing components 501. The number of ultrasonic testing components 501 and the fine-tuning components 401 are the same and their positions correspond one-to-one.

[0076] Reference Figure 6 and Figure 7 Each ultrasonic testing component 501 includes a testing housing 5011, several ultrasonic testing probes 5012, and several liquid inlet pipes 5013.

[0077] Each ultrasonic testing assembly 501 has a testing housing 5011 that is rotatably connected to a rotating frame 4013 in its corresponding fine-tuning assembly 401, with the rotation axis of the testing housing 5011 perpendicular to that of the rotating frame 4013. Two second limiting screws 5014 are fixed to the two outer side walls of the testing housing 5011 connected to the rotating frame 4013. The two second limiting screws 5014 on each side are located above the connection between the testing housing 5011 and the rotating frame 4013, and are positioned on opposite sides of the rotation axis of the testing housing 5011. The second limiting screws 5014 abut against the rotating frame 4013 to limit the rotation angle of the testing housing 5011, thus enabling fine-tuning of the angle of the testing housing 5011.

[0078] Reference Figure 7 and Figure 8 The detection housing 5011 has a receiving cavity 5015, the bottom of which completely penetrates the bottom of the detection housing 5011. An abutment block 5016 is also connected to the bottom of the detection housing 5011. A connecting bolt passes through the abutment block 5016, and the detection housing 5011 has a connecting screw hole for the connecting bolt. The abutment block 5016 is connected to the bottom of the detection housing 5011 through the engagement of the connecting bolt and the connecting screw hole. At the end of the abutment block 5016 away from the detection housing 5011, there is an abutment arc surface 5017 for conforming to the surface of a stainless steel pipe. The abutment arc surface 5017 has a through groove 5018 that communicates with the interior of the receiving cavity 5015.

[0079] The inner wall of the receiving cavity 5015 is fixed with a mounting part 5019, and a plurality of ultrasonic detection probes 5012 are mounted on the mounting part 5019. The plurality of ultrasonic detection probes 5012 are evenly distributed on the mounting part 5019 along the rotation axis of the detection housing 5011, and the plurality of ultrasonic detection probes 5012 are all set toward the slot opening of the through groove 5018.

[0080] The detection housing 5011 has two flow guiding cavities 5020, which are located on both sides of the receiving cavity 5015. Each flow guiding cavity 5020 has a flow guiding port 5021 at its upper end. The inner wall of the receiving cavity 5015 also has two flow guiding plates 5022 fixed to it, each corresponding to one of the two flow guiding cavities 5020. Each flow guiding plate 5022 is inclined downwards from the flow guiding port 5021 to the bottom of the receiving cavity 5015.

[0081] Several inlet pipes 5013 are evenly divided into two groups, and the two groups of inlet pipes 5013 are connected to two guide chambers 5020 in a one-to-one correspondence. Each group of inlet pipes 5013 is used to input liquid into the corresponding guide chamber 5020. When the guide chamber 5020 is full of liquid, the liquid will flow out from the corresponding guide port 5021, and after being guided by the guide plate 5022, it will flow into the receiving chamber 5015.

[0082] Reference Figure 5 and Figure 7 In actual use, the stainless steel pipe is placed on the upper end of the opposite end face of the driving roller 3011 and driven roller 3012 in several rotating components 301, and the axial direction of the stainless steel pipe is parallel to the length direction of the worktable 1. After the stainless steel pipe is placed, the corresponding ultrasonic detection component 501 is finely adjusted by several fine-tuning components 401 so that each abutting arc surface 5017 is in contact with the surface of the stainless steel pipe. Liquid is injected into the liquid inlet pipe 5013, and the liquid flows into the receiving cavity 5015 through the liquid inlet pipe 5013. When the receiving cavity 5015 is full of liquid, the liquid will fill the surface of the stainless steel pipe and between the ultrasonic detection probe 5012, and some liquid can flow out from the gap between the abutting arc surface 5017 and the surface of the stainless steel pipe, which is used as lubrication when the stainless steel pipe rotates. At the same time, two drive motors are started. Machine 2021 causes two drive screws 2031 to rotate synchronously. The rotation of the drive screws 2031 drives the sliding block 2032 to move along the length of the drive screws 2031, thereby causing the gantry frame 201 to move along the length of the worktable 1. At the same time, the power on the first rod is transmitted sequentially through the first intermediate shaft 6 and several synchronous components 9 to several rotating components 301, driving the active rollers 3011 in the rotating components 301 to rotate synchronously. The rotation of the active rollers 3011 then drives the stainless steel pipe to rotate, so that the rotation of the stainless steel pipe can be coordinated with the movement of the gantry frame 201. This allows the stainless steel pipe to rotate synchronously with the several ultrasonic testing components 501 during the movement. Then, the cracks in the stainless steel pipe are detected more comprehensively by the ultrasonic water immersion method, improving the detection quality of stainless steel pipe cracks.

[0083] Reference Figure 4 and Figure 6Assuming the diameter of the stainless steel pipe is X, the effective detection span of each ultrasonic testing component 501 along the length of the stainless steel pipe is Y, the diameter of each active roller 3011 is Z, and the relative slippage distance between the active roller 3011 and the stainless steel pipe per rotation is A; by reasonably setting the transmission ratio between the driven gear 8, the active gear 7, the synchronization component 9, and the transmission component 3013, the ratio of the number of rotations between the active roller 3011 and the stainless steel pipe is (π*X) / (π*Z+A). For every (π*X) / (π*Z+A) rotations of each active roller 3011, the stainless steel pipe actually rotates 1 rotation. The moving distance of the gantry 201 is H+YB, where H is the actual detection length of the stainless steel pipe, and B is the minimum compensation distance, specifically 5-10mm. Setting the minimum compensation distance ensures that the ultrasonic testing component 501 maintains a detection overlap area of ​​length B during the detection of the stainless steel pipe, reducing the occurrence of incomplete detection. With the above settings, the stainless steel pipe can be inspected when several ultrasonic testing components 501 move completely from one end to the other along the length of the stainless steel pipe during the actual testing process, which greatly improves the testing efficiency.

[0084] Reference Figure 5 An adjustment seat 10 is fixed at one end of the upper surface of the worktable 1 along the length direction, and a sliding seat 11 is also slidably connected thereto. The sliding seat 11 slides along the length direction of the worktable 1.

[0085] The adjusting seat 10 has an adjusting screw hole 12, and an adjusting screw 13 is threadedly connected to the adjusting screw hole 12. The length direction of the adjusting screw 13 is parallel to the length direction of the worktable 1. One end of the adjusting screw 13 is rotatably connected to the sliding seat 11, and the other end is fixedly connected to the adjusting handwheel 14. A stop block 15 is fixed to the upper end face of the sliding seat 11, which is used to abut against the stainless steel pipe. In actual use, the stainless steel pipe is placed on the upper end of the opposite end faces of the driving roller 3011 and the driven roller 3012. If it is necessary to adjust the position of the stainless steel pipe in the length direction of the worktable 1, the adjusting handwheel 14 can be rotated to rotate the adjusting screw 13. The adjusting screw 13 drives the sliding seat 11 to slide along the length direction of the worktable 1, which in turn drives the stop block 15 to slide along the length direction. The stop block 15 pushes the stainless steel pipe to move in the length direction of the worktable 1.

[0086] The working principle of this embodiment is as follows: the moving device 2 drives the ultrasonic testing device 5 to move along the length of the worktable 1. The stainless steel pipe rotates around its own axis through the rotating component 301, so that the stainless steel pipe rotates synchronously during the movement of the ultrasonic testing device 5. The stainless steel pipe is then subjected to a more comprehensive test by the ultrasonic water immersion method.

[0087] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An ultrasonic crack detection device for stainless steel pipes, characterized in that: It includes a worktable (1), a rotating device (3), a moving device (2), a fine-tuning device (4), and an ultrasonic testing device (5); The worktable (1) is used for placing workpieces, and the rotating device (3) is used to drive the workpieces on the worktable (1) to rotate around their own axis. The fine-tuning device (4) is connected to the moving device (2), and the moving device (2) is used to drive the fine-tuning device (4) to move along the length direction of the workpiece; The ultrasonic testing device (5) is connected to the fine-tuning device (4), which is used to adjust the height and angle of the ultrasonic testing device (5). The ultrasonic testing device (5) is used to test the workpiece. The mobile device (2) includes a gantry (201); The fine-tuning device (4) includes a plurality of fine-tuning components (401), which are arranged sequentially on the gantry (201) along the length of the worktable (1); Each of the aforementioned fine-tuning components (401) includes a drive element (4011), a mounting bracket (4012), and a rotating bracket (4013) mounted on the gantry (201); The output direction of each of the drive units (4011) is arranged in the vertical direction. Each of the mounting brackets (4012) is fixedly connected to the output end of the drive unit (4011) in the same group. Each of the rotating brackets (4013) is rotatably connected to the mounting bracket (4012) in the same group. The rotation axis of each of the rotating brackets (4013) is arranged horizontally and perpendicular to the length direction of the worktable (1). The rotating brackets (4013) are used for mounting the ultrasonic testing device (5). The ultrasonic testing device (5) includes several ultrasonic testing components (501), each of which includes a testing housing (5011), several ultrasonic testing probes (5012) and several liquid inlet pipes (5013). The detection housings (5011) in several ultrasonic detection components (501) are rotatably connected to the rotating frames (4013) in several fine-tuning components (401), and the rotation axis of each detection housing (5011) is perpendicular to the rotation axis of the corresponding rotating frame (4013). Each of the detection housings (5011) is provided with a receiving cavity (5015), the bottom of each receiving cavity (5015) is completely extended to the bottom of the corresponding detection housing (5011), and the bottom of each detection housing (5011) is provided with an abutment block (5016). The end face of the abutment block (5016) away from the detection housing (5011) is provided with an abutment arc surface (5017) for fitting the surface of the workpiece. The abutment arc surface (5017) is provided with a through groove (5018) communicating with the inside of the receiving cavity (5015). Several ultrasonic testing probes (5012) in the same group are installed inside the receiving cavity (5015) and are all oriented towards the opening of the through slot (5018). The detection housing (5011) has two flow guide cavities (5020), which are located on both sides of the receiving cavity (5015). Each flow guide cavity (5020) has a flow guide port (5021) at its upper end. The inner wall of the receiving cavity (5015) is also fixed with two flow guide plates (5022). The two flow guide plates (5022) correspond one-to-one with the two flow guide cavities (5020). Each flow guide plate (5022) is inclined downward from the flow guide port (5021) to the bottom of the receiving cavity (5015). Several inlet pipes (5013) are evenly divided into two groups. The two groups of inlet pipes (5013) are connected to two guide chambers (5020) in a one-to-one correspondence. Each group of inlet pipes (5013) is used to input liquid into the corresponding guide chamber (5020).

2. The ultrasonic crack detection device for stainless steel pipes according to claim 1, characterized in that: The rotating device (3) includes a plurality of rotating components (301), which are evenly arranged along the length direction on the upper surface of the workbench (1). Each of the rotating components (301) includes a drive roller (3011), a driven roller (3012), and a transmission element (3013) for driving the drive roller (3011) to rotate, wherein the drive roller (3011) is used to drive the workpiece to rotate.

3. The ultrasonic crack detection device for stainless steel pipes according to claim 2, characterized in that: The mobile device (2) includes a transmission assembly (203), a guide assembly (204), and a drive assembly (202); The transmission assembly (203) includes a transmission screw (2031) arranged along the length of the worktable (1) and a sliding block (2032) threadedly connected to the transmission screw (2031). The upper end of the sliding block (2032) is fixedly connected to the lower end of the gantry (201). The guide assembly (204) includes a guide rail (2041) arranged along the length of the worktable (1) and a slider (2042) slidably connected to the guide rail (2041). The upper end of the slider (2042) is fixedly connected to the lower end of the sliding block (2032). The drive assembly (202) includes a drive motor (2021) for driving the transmission screw (2031) to rotate and a coupling (2022). The output shaft of the drive motor (2021) is coaxially connected to the transmission screw (2031) through the coupling (2022).

4. The ultrasonic crack detection device for stainless steel pipes according to claim 3, characterized in that: Each of the fine-tuning components (401) further includes a first limiting screw (4014) connected to the mounting bracket (4012), the first limiting screw (4014) being used to abut against the rotating bracket (4013) in the same group to limit the rotation angle of the rotating bracket (4013); The outer wall of the detection housing (5011) is provided with a second limiting screw (5014), which is used to abut against the rotating frame (4013) to limit the rotation angle of the detection housing (5011).

5. The ultrasonic crack detection device for stainless steel pipes according to claim 1, characterized in that: The upper surface of the workbench (1) is fixed with an adjustment seat (10) and slidably connected with a sliding seat (11); The adjusting seat (10) is provided with an adjusting screw hole (12), and the adjusting screw hole (12) is threadedly connected to an adjusting screw rod (13). The length direction of the adjusting screw rod (13) is parallel to the length direction of the worktable (1). One end of the adjusting screw (13) along the length direction is connected to an adjusting handwheel (14), which is used to drive the adjusting screw (13) to rotate. The end of the adjusting screw (13) away from the adjusting handwheel (14) is rotatably connected to the sliding seat (11) to drive the sliding seat (11) to slide along the length direction of the worktable (1). The upper end of the sliding seat (11) is provided with an abutment block (15), which is used to abut against the workpiece.

6. The ultrasonic crack detection device for stainless steel pipes according to claim 3, characterized in that: The two transmission screws (2031) are screw one and screw two respectively. The end of screw one away from the drive motor (2021) is coaxially provided with a drive gear (7). The worktable (1) is rotatably connected to a first intermediate shaft (6). The first intermediate shaft (6) is parallel to screw one. The first intermediate shaft (6) is provided with a driven gear (8) that meshes with the drive gear (7). The first intermediate shaft (6) is also provided with a plurality of synchronization components (9), the number of which is the same as that of the rotation components (301) and their positions correspond one to one; Each synchronization component (9) includes a first synchronization bevel gear (901), a second synchronization bevel gear (902), a third synchronization bevel gear (903), and a second intermediate shaft (904); The first synchronous bevel gear (901) is coaxially fixed to the first intermediate shaft (6), and the second synchronous bevel gear (902) and the third synchronous bevel gear (903) are coaxially fixed to both ends of the second intermediate shaft (904). The second synchronous bevel gear (902) meshes with the first synchronous bevel gear (901) to transmit the power of the intermediate shaft to the third synchronous bevel gear (903). The transmission component (3013) is a bevel gear. The transmission component (3013) and the drive roller (3011) in the same rotating assembly (301) are fixed coaxially. The third synchronous bevel gear (903) in each synchronous assembly (9) meshes with the transmission component (3013) in the corresponding rotating assembly (301).

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