An ultrasonic flaw detection device and method for weld seams of inner circular axial curved surface workpieces

Abstract

The present invention discloses an ultrasonic flaw detection device and method for the weld of an inner circular axial curved surface workpiece, relating to the technical field of ultrasonic flaw detection equipment, comprising a flaw detection instrument, a connector, a flaw detection mechanism, a snap mechanism, a mounting groove and a pipe. The flaw detection instrument is placed inside the pipe, and a connector is provided on one side of the flaw detection instrument, the connector is linearly connected to an external ultrasonic flaw detector, a mounting groove is provided inside the flaw detection instrument, a snap mechanism with threaded transmission is provided in the mounting groove, and the mounting groove is movably connected to the flaw detection mechanism through the snap mechanism; an operator rotates a knob to drive a first probe plate to rotate, and limits its rotation range so that it is accurately adjusted to a suitable flaw detection angle; a second probe plate cooperates with the first probe plate to adjust its position and angle through a rotating rod, and the two are tightly fitted to the weld of the inner circular axial curved surface of the pipe, ensuring that ultrasonic waves are effectively transmitted into the pipe, reducing interface reflection and loss, and greatly improving the accuracy of flaw detection.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic flaw detection equipment, in particular to an ultrasonic flaw detection device and method for weld seams of inner circular axial curved surface workpieces. Background Art

[0002] In modern industrial production, the quality of a workpiece's welds is directly related to the safety and reliability of the entire product. For example, in aircraft engine manufacturing, defects in the welds of the inner axially curved pipe surface can cause engine failure during operation, seriously threatening flight safety. In oil pipelines, weld defects can cause leaks, resulting in environmental pollution and significant economic losses.

[0003] Traditional ultrasonic flaw detection technology has many limitations when it comes to internal cylindrical axially curved workpieces. On the one hand, conventional flaw detection devices are difficult to fit tightly to the internal cylindrical axially curved surface, resulting in inaccurate angles of ultrasonic emission and reception, and inability to effectively detect tiny defects deep in the weld. On the other hand, the existing equipment lacks adjustment flexibility and is difficult to adapt to internal cylindrical axially curved workpieces of different sizes and shapes, resulting in low flaw detection efficiency. Moreover, when different operators use the existing equipment, the flaw detection results vary greatly, lacking unified standards and comparability. Therefore, those skilled in the art provide an ultrasonic flaw detection device and method for welds of internal cylindrical axially curved workpieces to solve the problems raised in the above-mentioned background technology. Summary of the Invention

[0004] The object of the present invention is to provide an ultrasonic flaw detection device and method for welds of inner circular axial curved surface workpieces, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An ultrasonic flaw detection device and method for welds of inner cylindrical axially curved workpieces, comprising a flaw detection instrument, a connector, a flaw detection mechanism, a snap mechanism, a mounting groove, and a pipe. The device is characterized in that a flaw detection instrument is placed inside the pipe, and a connector is provided on one side of the flaw detection instrument, the connector is linearly connected to an external ultrasonic flaw detector, a mounting groove is provided inside the flaw detection instrument, a snap mechanism with a threaded drive is provided in the mounting groove, and the mounting groove is movably connected to the flaw detection mechanism via the snap mechanism.

[0007] As a further solution of the present invention: the snap mechanism includes a rotating wheel, a movable rod, an adjusting wheel, a threaded rod, an adjusting block, a guide frame, a limit frame, a fixed frame, a guide groove, a limit block, a limit seat and a limit groove, the fixed frame is symmetrically fixedly connected in the installation groove, the threaded rod is movably connected between the fixed frame and the installation groove, the adjusting wheel is fixedly connected below the threaded rod, and a movable rod is provided on one side of the threaded rod, the rotating wheel is provided on the movable rod, the rotating wheel and the adjusting wheel are engaged with each other, and the limit seats are symmetrically provided in the installation groove.

[0008] As a further solution of the present invention: limiting grooves are provided on both side surfaces of the limiting seat, and limiting frames are slidably connected to the limiting grooves. A guide frame is provided between the limiting frames on both sides, and a guide groove is provided on the side of the limiting frame close to the guide frame. The limiting frame is slidably connected to the guide frame through the guide groove, and an adjustment block is fixedly connected to one side of the guide frame. The interior of the adjustment block is a threaded structure, and the adjustment block is located on the threaded rod, and the threads between the threaded rod and the adjustment block cooperate with each other.

[0009] As a further solution of the present invention: the flaw detection mechanism includes a first detection plate, a rotating frame, a rotating rod, a fixed plate, a limit buckle, a rotating sleeve, a limit protrusion and a limit groove. The fixed plate is placed in the installation groove, and the rotating frame is symmetrically arranged on the fixed plate. The rotating frame is movably connected to the rotating rod, and the second detection plate is fixedly connected to the rotating rod, and the four corners below the fixed plate are fixedly connected to the limit buckles.

[0010] As a further solution of the present invention: a rotating sleeve is movably connected to one side of the rotating rod, and a limiting protrusion is symmetrically provided on the rotating sleeve, and a first probe plate is movably connected to the rotating rod, and a limiting groove is provided on the side of the first probe plate close to the protrusion, the limiting protrusion and the limiting groove cooperate with each other, and a knob is fixedly connected to one side of the rotating sleeve.

[0011] As a further solution of the present invention: the first detection plate and the second detection plate are matched in size, and the first detection plate and the second detection plate are in contact with the surface of the pipe.

[0012] A working method of an ultrasonic flaw detection device for a weld of an inner circular axially curved workpiece comprises the following steps:

[0013] S1: Depending on the condition of the test block or workpiece, use the knob to rotate the rotating sleeve. The limiting protrusion and limiting groove cooperate to adjust the angle of the first probe plate. At the same time, the rotating rod drives the second probe plate to move in coordination, so that the first and second probe plates fit well with the surface of the pipe. By operating on the test block, it is ensured that when the workpiece is subsequently inspected, the ultrasonic wave can be transmitted into the workpiece in the correct direction and angle, thereby improving the accuracy of the inspection.

[0014] S2: During the process of adjusting the probe plate position, the probe plate position is adjusted through the test block according to the feedback result of the test block;

[0015] S3: Rotate the adjusting wheel to drive the threaded rod to rotate, and the adjusting block moves linearly through the thread transmission, thereby driving the guide frame and the limit frame to move. When the limit frame moves, the limit block and the limit buckle cooperate to fix the flaw detection mechanism in the installation slot;

[0016] S4: Start the flaw detector and the external ultrasonic flaw detector. The ultrasonic probes inside the first and second probe plates transmit ultrasonic waves into the pipe. When the ultrasonic waves propagate through the pipe and encounter weld defects, they are reflected and refracted. Part of the ultrasonic waves are reflected back to the probes. The probes convert the reflected waves into electrical signals and transmit them to the ultrasonic flaw detector. The flaw detector processes and analyzes the electrical signals and determines whether there are defects in the weld, as well as the location and size of the defects based on the time and amplitude of the reflected waves.

[0017] S5: Record various data and results during the flaw detection process, including relevant information of defects, and generate a flaw detection report.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The operator can rotate the knob to drive the first probe plate to rotate and limit its rotation range so that the first probe plate can be accurately adjusted to the appropriate flaw detection angle, and the second probe plate cooperates with the rotating rod. After the second probe plate and the first probe plate adjust their positions and angles in coordination, the two can fit tightly against the inner axial curved weld of the pipe. This precise fit ensures that the ultrasonic wave can effectively enter the interior of the pipe, reduces interface reflection and loss, greatly improves the accuracy of flaw detection, and can more accurately detect defects in welds. Based on the good fit of the probe plates and the principle of ultrasonic flaw detection, the ultrasonic flaw detector can detect defects in welds according to the time and angle of the reflected wave. The device can accurately determine whether there are defects in the weld, as well as the location and size of the defects, by adjusting the angle and position of the probe plate. The device can make the first and second probe plates fit the welds of inner axial curved pipes of different specifications and shapes, adapting to diverse industrial production needs and expanding the scope of application of the device. The convenient and fast probe plate module switching function enables the device to quickly replace the appropriate probe plate module according to different flaw detection requirements, improving the flexibility and versatility of the device and better meeting complex and changing flaw detection work scenarios.

[0020] 2. When it is necessary to switch different probe plate modules, the operator will turn the adjusting wheel. Since the adjusting wheel is fixedly connected to the threaded rod, the rotation of the adjusting wheel will drive the threaded rod to rotate synchronously. At the same time, the rotating wheel and the adjusting wheel are engaged with each other, and the rotation of the adjusting wheel will cause the rotating wheel to start rotating. When the threaded rod rotates, since the adjusting block has a threaded structure inside and cooperates with the thread of the threaded rod, according to the principle of thread transmission, the rotational motion of the threaded rod will be converted into a linear motion of the adjusting block, and the adjusting block will move along the axial direction of the threaded rod. The limit seat is symmetrically arranged in the mounting groove, and the limit grooves on its two side surfaces are slidably connected to the limit frame, which limits the limit The movement trajectory of the frame allows it to move in a straight line only along the direction of the limit groove, avoiding the limit frame from offsetting or shaking during movement. A guide groove is provided on the side of the limit frame close to the guide frame. The guide frame is slidingly connected to the limit frame through the guide groove. The guide frame is fixedly connected to the adjustment block. When the adjustment block moves in a straight line driven by the threaded rod, the guide frame will also move accordingly. The guide groove provides further guiding effect for the movement of the guide frame, ensuring that the guide frame and other components connected to it can move smoothly and accurately. When the limit frame moves to the appropriate position, the limit block and the limit buckle cooperate with each other to fix or adjust the position of the flaw detection mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is a schematic diagram of the structure of an ultrasonic flaw detection device used for welds of inner circular axial curved surface workpieces.

[0022] Figure 2 The figure is a schematic diagram of the structure of a flaw detection mechanism used in an ultrasonic flaw detection device for welds of inner circular axial curved surface workpieces.

[0023] Figure 3 The present invention is a schematic diagram of the cooperation between the first probe plate and the second probe plate in the flaw detection mechanism of an ultrasonic flaw detection device for the weld of an inner circular axial curved surface workpiece.

[0024] Figure 4 The present invention is a structural schematic diagram of a rotating sleeve in a flaw detection mechanism of an ultrasonic flaw detection device for welds of inner circular axially curved workpieces.

[0025] Figure 5 The present invention is a schematic diagram of the cooperation between the rotating sleeve and the first probe plate in the flaw detection mechanism of an ultrasonic flaw detection device for the weld of an inner circular axial curved surface workpiece.

[0026] Figure 6 The figure is a schematic diagram of the structure of a snap mechanism used in an ultrasonic flaw detection device for welds of inner circular axial curved surface workpieces.

[0027] Figure 7 The figure is a schematic diagram of the cooperation between the limit seat and the limit frame in the snap mechanism of an ultrasonic flaw detection device for the weld of an inner circular axial curved surface workpiece.

[0028] Figure 8 The figure is a schematic diagram of the internal structure of a mounting groove in an ultrasonic flaw detection device for welds of inner circular axially curved workpieces.

[0029] Figure 9 The figure is a schematic diagram of the structure of a pipe used in an ultrasonic flaw detection device for welds of inner circular axial curved surface workpieces.

[0030] In the figure: 1. flaw detection instrument; 2. connector; 3. flaw detection mechanism; 301. first detection plate; 302. rotating frame; 303. rotating rod; 304. fixed plate; 305. limiting buckle; 306. rotating sleeve; 307. limiting protrusion; 308. limiting groove; 309. knob; 310. second detection plate; 4. buckle mechanism; 401. rotating wheel; 402. movable rod; 403. adjusting wheel; 404. threaded rod; 405. adjusting block; 406. guide frame; 407. limiting frame; 408. fixed frame; 409. guide groove; 410. limiting block; 411. limiting seat; 412. limiting groove; 5. mounting groove; 6. pipe. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] Example 1

[0033] Reference Figure 1 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 This embodiment provides an ultrasonic flaw detection device for welds of inner cylindrical axially curved workpieces, comprising a flaw detection instrument 1, a connector 2, a flaw detection mechanism 3, a snap mechanism 4, a mounting groove 5, and a pipe 6. The flaw detection instrument 1 is placed inside the pipe 6, and a connector 2 is provided on one side of the flaw detection instrument 1. The connector 2 is linearly connected to an external ultrasonic flaw detector. The flaw detection instrument 1 has a mounting groove 5 formed therein, and a snap mechanism 4 with a threaded drive is provided in the mounting groove 5. The mounting groove 5 is movably connected to the flaw detection mechanism 3 via the snap mechanism 4.

[0034] In this embodiment, specifically, the buckle mechanism 4 includes a rotating wheel 401, a movable rod 402, an adjusting wheel 403, a threaded rod 404, an adjusting block 405, a guide frame 406, a limiting frame 407, a fixed frame 408, a guide groove 409, a limiting block 410, a limiting seat 411 and a limiting groove 412. The fixing frame 408 is symmetrically fixedly connected in the mounting groove 5, and the fixing frame 408 is movably connected to the mounting groove 5 with a threaded rod 404. The adjusting wheel 403 is fixedly connected below the threaded rod 404, and a movable rod 402 is provided on one side of the threaded rod 404. The rotating wheel 401 is provided on the movable rod 402. The rotating wheel 401 and the adjusting wheel 403 are engaged with each other, and the limiting seats 411 are symmetrically provided in the mounting groove 5.

[0035] The limiting seat 411 has limiting grooves 412 on both sides thereof, and the limiting grooves 412 are slidably connected to the limiting frames 407. A guide frame 406 is provided between the limiting frames 407 on both sides, and a guide groove 409 is provided on the side of the limiting frame 407 close to the guide frame 406. The limiting frame 407 is slidably connected to the guide frame 406 through the guide groove 409. An adjustment block 405 is fixedly connected to one side of the guide frame 406. The adjustment block 405 has a threaded structure inside. The adjustment block 405 is located on the threaded rod 404, and the threads of the threaded rod 404 and the adjustment block 405 cooperate with each other.

[0036] A limiting block 410 is provided on one side of the limiting frame 407 close to the limiting buckle 305, and the limiting block 410 cooperates with the limiting buckle 305;

[0037] When it is necessary to switch different probe plate modules, the operator will rotate the adjusting wheel 403. Since the adjusting wheel 403 is fixedly connected to the threaded rod 404, the rotation of the adjusting wheel 403 will drive the threaded rod 404 to rotate synchronously. At the same time, the rotating wheel 401 and the adjusting wheel 403 are meshed with each other, and the rotation of the adjusting wheel 403 will cause the rotating wheel 401 to start rotating. When the threaded rod 404 rotates, since the adjusting block 405 has a threaded structure inside and cooperates with the thread of the threaded rod 404, according to the principle of thread transmission, the rotational motion of the threaded rod 404 will be converted into a linear motion of the adjusting block 405, and the adjusting block 405 will move along the axial direction of the threaded rod 404. The limit seat 411 is symmetrically arranged in the mounting groove 5, and the limit grooves 412 on its two side surfaces are slidably connected to the limit frame 407, which limits the limit frame 4 07's movement trajectory allows it to move only in a straight line along the direction of the limit slot 412, preventing the limit frame 407 from offsetting or shaking during movement. A guide slot 409 is provided on the side of the limit frame 407 close to the guide frame 406. The guide frame 406 is slidingly connected to the limit frame 407 through the guide slot 409. The guide frame 406 is fixedly connected to the adjustment block 405. When the adjustment block 405 moves in a straight line driven by the threaded rod 404, the guide frame 406 will also move accordingly. The guide slot 409 provides further guiding for the movement of the guide frame 406, ensuring that the guide frame 406 and other components connected thereto can move smoothly and accurately. When the limit frame 407 moves to the appropriate position, the limit block 410 cooperates with the limit buckle 305 to achieve fixation or position adjustment of the flaw detection mechanism 3.

[0038] Example 2

[0039] Reference Figure 2-Figure 5 This embodiment is based on the previous embodiment and differs from the previous embodiment in that the flaw detection mechanism 3 includes a first detection plate 301, a rotating frame 302, a rotating rod 303, a fixed plate 304, a limiting buckle 305, a rotating sleeve 306, a limiting protrusion 307 and a limiting groove 308. The fixing plate 304 is placed in the mounting groove 5, and the rotating frame 302 is symmetrically arranged on the fixing plate 304. The rotating frame 302 is movably connected to the rotating rod 303. The second detection plate 310 is fixedly connected to the rotating rod 303, and the limiting buckles 305 are fixedly connected to the four corners below the fixing plate 304.

[0040] One side of the rotating rod 303 is movably connected to a rotating sleeve 306, and a limiting protrusion 307 is symmetrically provided on the rotating sleeve 306. The rotating rod 303 is movably connected to the first probe plate 301, and a limiting groove 308 is provided on the side of the first probe plate 301 close to the protrusion. The limiting protrusion 307 and the limiting groove 308 cooperate with each other, and a knob 309 is fixedly connected to one side of the rotating sleeve 306;

[0041] The first probe plate 301 and the second probe plate 310 are matched in size, and the first probe plate 301 and the second probe plate 310 are in contact with the surface of the pipe 6;

[0042] The operator rotates the knob 309 to drive the rotating sleeve 306 to rotate. The limiting protrusion 307 on the rotating sleeve 306 cooperates with the limiting groove 308 on the first detection plate 301. When the rotating sleeve 306 rotates, the limiting protrusion 307 slides in the limiting groove 308, thereby driving the first detection plate 301 to rotate and limiting the rotation range of the first detection plate 301 to avoid excessive rotation, ensuring that the first detection plate 301 can be accurately adjusted to a suitable flaw detection angle. The fixed connection on the rotating rod 303 Next, the second probe plate 310 moves synchronously with the rotating rod 303 as the rotating rod 303 rotates, adjusting its position and angle in coordination with the first probe plate 301. After the angle and position are adjusted, the first and second probe plates 301 and 310 are perfectly matched in size and fit snugly against the inner axially curved weld seam of the pipe 6. This fit ensures that ultrasonic waves can effectively transmit from the probe plates into the pipe, reducing reflection and loss of ultrasonic waves at the interface and improving the accuracy of flaw detection. The principle of ultrasonic flaw detection: The first and second probe plates 301 and 310 are typically equipped with ultrasonic probes. During flaw detection, the probes emit ultrasonic waves into the pipe. The ultrasonic waves propagate through the pipe. When they encounter defects in the weld, the ultrasonic waves are reflected or refracted, with some of the ultrasonic waves reflected back to the probes. After receiving the reflected waves, the probes convert them into electrical signals and transmit them to the ultrasonic flaw detector. The ultrasonic flaw detector processes and analyzes the received electrical signals, determining the presence of defects in the weld seam, as well as the location and size of the defects based on parameters such as the time and amplitude of the reflected waves.

[0043] Example 3

[0044] Reference Figure 1-Figure 7 This embodiment is based on the previous embodiment and differs from the previous embodiment in that a working method of an ultrasonic flaw detection device for a weld of an inner circular axial curved surface workpiece includes the following steps:

[0045] S1: Depending on the condition of the test block or workpiece, the knob 309 is used to rotate the rotating sleeve 306. The limiting protrusion 307 cooperates with the limiting groove 308 to adjust the angle of the first probe plate 301. At the same time, the rotating rod 303 drives the second probe plate 310 to move in coordination, so that the first probe plate 301 and the second probe plate 310 are well fitted with the surface of the pipe 6. By operating on the test block, it is ensured that when the workpiece is subsequently inspected, the ultrasonic wave can be transmitted into the workpiece in the correct direction and angle, thereby improving the accuracy of the inspection;

[0046] S2: During the process of adjusting the probe plate position, the probe plate position is adjusted through the test block according to the feedback result of the test block;

[0047] S3: Rotate the adjusting wheel 403 to drive the threaded rod 404 to rotate, and the adjusting block 405 moves linearly through the threaded transmission, thereby driving the guide frame 406 and the limit frame 407 to move. When the limit frame 407 moves, the limit block 410 cooperates with the limit buckle 305 to fix the flaw detection mechanism 3 in the installation slot 5;

[0048] S4: Start the flaw detector 1 and the external ultrasonic flaw detector. The ultrasonic probes inside the first probe plate 301 and the second probe plate 310 transmit ultrasonic waves into the pipe 6. When the ultrasonic waves propagate in the pipe 6 and encounter weld defects, reflection and refraction occur, and part of the ultrasonic waves are reflected back to the probes. The probes convert the reflected waves into electrical signals and transmit them to the ultrasonic flaw detector. The flaw detector processes and analyzes the electrical signals and determines whether there is a defect in the weld, as well as the location and size of the defect based on the time and amplitude of the reflected waves.

[0049] S5: Record various data and results during the flaw detection process, including relevant information of defects, and generate a flaw detection report.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0051] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An ultrasonic flaw detection device for welds of inner cylindrical axial curved surface workpieces, comprising a flaw detection instrument (1), a connector (2), a flaw detection mechanism (3), a snap mechanism (4), a mounting groove (5) and a pipe (6), characterized in that: A flaw detector (1) is placed inside the pipe (6), and a connector (2) is provided on one side of the flaw detector (1), the connector (2) is linearly connected to an external ultrasonic flaw detector, a mounting groove (5) is provided inside the flaw detector (1), a screw-driven snap mechanism (4) is provided in the mounting groove (5), and the mounting groove (5) is movably connected to the flaw detector mechanism (3) via the snap mechanism (4); The flaw detection mechanism (3) comprises a first detection plate (301), a rotating frame (302), a rotating rod (303), a fixed plate (304), a limiting buckle (305), a rotating sleeve (306), a limiting protrusion (307) and a limiting groove (308); the fixed plate (304) is placed in the installation groove (5); the rotating frame (302) is symmetrically arranged on the fixed plate (304); the rotating frame (302) is movably connected to the rotating rod (303); the rotating rod (303) is fixedly connected to the second detection plate (310); and the limiting buckles (305) are fixedly connected to the four corners below the fixed plate (304).

2. The ultrasonic flaw detection device for welds of inner cylindrical axial curved workpieces according to claim 1 is characterized in that: The buckle mechanism (4) comprises a rotating wheel (401), a movable rod (402), an adjusting wheel (403), a threaded rod (404), an adjusting block (405), a guide frame (406), a limiting frame (407), a fixed frame (408), a guide groove (409), a limiting block (410), a limiting seat (411) and a limiting groove (412). The fixing frame (408) is symmetrically fixedly connected in the installation groove (5). The threaded rod (404) is movably connected between the fixing frame (408) and the installation groove (5). The adjusting wheel (403) is fixedly connected below the threaded rod (404). A movable rod (402) is provided on one side of the threaded rod (404). A rotating wheel (401) is provided on the movable rod (402). The rotating wheel (401) and the adjusting wheel (403) are meshed with each other. The limiting seat (411) is symmetrically provided in the installation groove (5).

3. The ultrasonic flaw detection device for welds of inner cylindrical axial curved workpieces according to claim 2 is characterized in that: Limiting grooves (412) are provided on both sides of the limiting seat (411), and the limiting grooves (412) are slidably connected to the limiting frames (407). A guide frame (406) is provided between the limiting frames (407) on both sides, and a guide groove (409) is provided on the side of the limiting frame (407) close to the guide frame (406). The limiting frame (407) is slidably connected to the guide frame (406) through the guide groove (409). An adjusting block (405) is fixedly connected to one side of the guide frame (406). The adjusting block (405) has a threaded structure inside. The adjusting block (405) is located on the threaded rod (404), and the threads of the threaded rod (404) and the adjusting block (405) cooperate with each other.

4. The ultrasonic flaw detection device for welds of inner cylindrical axial curved workpieces according to claim 1 is characterized in that: One side of the rotating rod (303) is movably connected to a rotating sleeve (306), a limiting protrusion (307) is symmetrically provided on the rotating sleeve (306), and a first detection plate (301) is movably connected to the rotating rod (303), a limiting groove (308) is provided on a side of the first detection plate (301) close to the protrusion, the limiting protrusion (307) and the limiting groove (308) cooperate with each other, and a knob (309) is fixedly connected to one side of the rotating sleeve (306).

5. The ultrasonic flaw detection device for welds of inner cylindrical axial curved workpieces according to claim 4 is characterized in that: The first detection plate (301) and the second detection plate (310) are matched in size, and the first detection plate (301) and the second detection plate (310) are in contact with the surface of the pipe (6).

6. The ultrasonic flaw detection device for welds of inner cylindrical axial curved workpieces according to claim 3 is characterized in that: A limiting block (410) is provided on one side of the limiting frame (407) close to the limiting buckle (305), and the limiting block (410) and the limiting buckle (305) cooperate with each other.

7. A method for operating an ultrasonic flaw detection device for welds of inner cylindrical axially curved workpieces according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Based on the condition of the test block or the workpiece, the knob (309) is used to rotate the rotating sleeve (306), and the angle of the first probe plate (301) is adjusted by the cooperation of the limiting protrusion (307) and the limiting groove (308). At the same time, the rotating rod (303) drives the second probe plate (310) to move in coordination, so that the first probe plate (301) and the second probe plate (310) are well fitted with the surface of the pipe (6). By operating on the test block, it is ensured that when the workpiece is subsequently inspected, the ultrasonic wave can be transmitted into the interior of the workpiece in the correct direction and angle, thereby improving the accuracy of the inspection; S2: During the process of adjusting the probe plate position, the probe plate position is adjusted through the test block according to the feedback result of the test block; S3: rotating the adjusting wheel (403) to drive the threaded rod (404) to rotate, and the adjusting block (405) is moved linearly through the threaded transmission, thereby driving the guide frame (406) and the limit frame (407) to move. When the limit frame (407) moves, the limit block (410) cooperates with the limit buckle (305) to fix the flaw detection mechanism (3) in the installation groove (5); S4: Start the flaw detector (1) and the external ultrasonic flaw detector. The ultrasonic probes inside the first probe plate (301) and the second probe plate (310) emit ultrasonic waves into the pipe (6). When the ultrasonic waves propagate in the pipe (6) and encounter weld defects, reflection and refraction occur. Part of the ultrasonic waves are reflected back to the probes. The probes convert the reflected waves into electrical signals and transmit them to the ultrasonic flaw detector. The flaw detector processes and analyzes the electrical signals and determines whether there are defects in the weld, as well as the location and size of the defects based on the time and amplitude of the reflected waves. S5: Record various data and results during the flaw detection process, including relevant information of defects, and generate a flaw detection report.

Images