Ultrasonic flaw detector calibrating device

Abstract

The invention belongs to the technical field of nondestructive testing equipment calibration, and provides an ultrasonic flaw detector calibrating device which comprises positioning plates distributed annularly, a detection shell rotationally connected between the positioning plates and provided with an opening in the top, a cover plate arranged at the top of the detection shell, and a movably connected detection insertion ring arranged on the cover plate. An ultrasonic probe is inserted into the detection insertion ring, and calibration blocks which are annularly distributed are arranged in the detection shell; the device further comprises a bearing connecting piece, the bearing connecting piece is installed on the outer wall of one positioning plate, the bearing connecting piece is provided with a rotating adjusting plate in rotating connection, the other end of the rotating adjusting plate is provided with a vertically-arranged calibration plate, and a regulation and control assembly is arranged between the calibration plate and the rotating adjusting plate. By designing the integrated detection device, multi-parameter calibration and verification of the flaw detector can be realized, subjective errors are reduced, and the verification accuracy is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of non-destructive testing equipment calibration, in particular to an ultrasonic flaw detector calibration device. Background Art

[0002] The ultrasonic flaw detector emits high-frequency ultrasonic waves and uses the reflection, refraction and scattering phenomena generated when the ultrasonic waves encounter defects (such as cracks, pores, inclusions, etc.) when propagating inside the material to capture the reflected wave signal, analyze and process it, and finally present the location, size and nature of the defect in the form of an image.

[0003] Its core principles are based on:

[0004] Reflection characteristics: Ultrasonic waves are reflected at the interface of media with different acoustic impedances (such as the junction between defects and materials), and the reflection intensity is proportional to the difference in the media.

[0005] Directional advantage: High-frequency ultrasonic waves have a narrow beam and good directionality, which can accurately locate the defect position.

[0006] Penetration ability: It can penetrate metal, non-metal and other materials, and the detection depth can reach several meters.

[0007] Since the detection accuracy of ultrasonic flaw detectors is affected by factors such as material sound velocity uniformity, temperature changes, surface roughness, and magnetic field interference, ultrasonic flaw detectors need to be calibrated and verified.

[0008] However, traditional calibration relies on manual operation of standard test blocks, which is subject to subjective errors. Moreover, when testing ultrasonic probes, if different parameters need to be calibrated, different instruments need to be adapted, which increases the detection time of the ultrasonic flaw detector. Summary of the Invention

[0009] In order to solve the above technical problems, the present invention provides an ultrasonic flaw detector calibration device to solve the problems of large subjective errors in the calibration of ultrasonic flaw detectors in the prior art.

[0010] The ultrasonic flaw detector calibration device includes positioning plates arranged in an annular shape, a detection housing rotatably connected and open at the top provided between the positioning plates, a cover provided on the top of the detection housing, a movable detection insert ring provided on the cover, an ultrasonic probe inserted into the detection insert ring, and calibration blocks arranged in an annular shape inside the detection housing;

[0011] It also includes a load-bearing connection member, which is installed on the outer wall of one of the positioning plates. The load-bearing connection member is provided with a rotation adjustment plate that is rotatably connected. A vertically arranged calibration plate is installed at the other end of the rotation adjustment plate, and a regulating component is arranged between the calibration plate and the rotation adjustment plate.

[0012] Preferably, a base plate is provided at the bottom of the positioning plate, and each positioning plate is symmetrically provided with upper and lower limit slots on one side close to the detection shell, and upper and lower limit rings are symmetrically provided on the outer wall of the detection shell. The limit rings are movably clamped in the limit slots, and an angle sensor of an external power supply is provided on the top of the positioning plate.

[0013] Preferably, a motor 1 with an external power supply is provided on the top of the base plate, the output shaft of the motor 1 is connected to the bottom of the detection shell, a ring-shaped mounting plate is provided on the top of the upper limit ring, a T-shaped pin with a movable connection is provided on the mounting plate, a reset spring is provided on the side of the T-shaped pin close to the cover plate, and positioning holes distributed at intervals are provided on the outer ring wall of the cover plate, and the T-shaped pin cooperates with the positioning holes.

[0014] Preferably, a sliding hole is provided on the cover plate, and the sliding hole is located directly above the calibration block. The vertical cross-sectional profile of the detection insert ring is "T"-shaped, and the detection insert ring moves in the sliding hole.

[0015] Preferably, an adjusting cylinder is provided on the inner bottom plate of the detection shell, a lifting plate is provided at the end of the piston rod of the adjusting cylinder, a ring-shaped bearing groove is provided on the top of the lifting plate, and protective pads are provided on the inner opposite side walls of the bearing groove. The calibration block is placed in the bearing groove and fits with the protective pad.

[0016] Preferably, the bearing connecting member is composed of a bearing plate and a connecting plate, the bearing plate is fixedly connected to the outer wall of one of the positioning plates, a receiving groove is provided inside the bearing plate, the vertical cross-sectional profile of the connecting plate is "L"-shaped, the "L"-shaped transverse section of the connecting plate is inserted into the receiving groove, and the front and rear side plates of the bearing plate are provided with positioning grooves that are positioned opposite to each other.

[0017] Preferably, the vertical cross-sectional profile of the positioning groove is waist-shaped, positioning pins are symmetrically provided in the accommodating groove, the positioning pins pass through the connecting plate, and a compression spring is provided at the other end of the interior of the accommodating groove, and the other end of the compression spring abuts against the connecting plate.

[0018] Preferably, the top of the "L"-shaped vertical section of the connecting plate is inserted into one end of the rotation adjustment plate, and an adjustment shaft is provided in the rotation adjustment plate. The adjustment shaft passes through the connecting plate and is fixedly connected to it. The top of the rotation adjustment plate is provided with a second motor with an external power supply, and the output shaft of the second motor is connected to a rotating shaft through a coupling, and an adjustment rope is provided between the rotating shaft and the adjustment shaft.

[0019] Preferably, the regulating component includes a supporting frame, a main shaft is provided inside the supporting frame, an adjusting gear is connected to the main shaft and located inside the supporting frame, a motor three with an external power supply is provided outside the supporting frame, the output shaft of the motor three is connected to the main shaft through a coupling, a lifting rack is provided on one side of the adjusting gear, the calibration plate is connected to the bottom side wall of the lifting rack, a sliding block is provided on the side of the lifting rack away from the adjusting gear, a vertical guide rail is provided inside the supporting frame, and the sliding block is slidably installed on the vertical guide rail.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention provides a detection housing with calibration blocks arranged in an annular pattern inside the detection housing. Each calibration block has a different material and internal structure. A cover plate is installed on the top of the detection housing, and a detection insert ring is provided on the cover plate. The ultrasonic probe is inserted downward into the detection housing to calibrate the calibration blocks. The accuracy of the ultrasonic probe is checked by a connected flaw detector. The motor drives the detection housing to rotate, driving the next calibration block to rotate under the ultrasonic probe. Thus, the sensitivity of the ultrasonic probe is verified by different calibration blocks, reducing manual intervention and improving the accuracy of ultrasonic probe calibration.

[0022] Moreover, by designing a calibration plate on the device, the calibration plate can be automatically moved up and down through the control component. The ultrasonic probe can be irradiated on it to detect its vertical linear error. Different parameters can be calibrated on the same device, which improves the flexibility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the ultrasonic flaw detector calibration device of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the bottom plate, positioning plate and other components of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the detection housing and the limit ring and other components of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the detection shell and cover plate disassembly components of the present invention;

[0027] Figure 5 This is a cross-sectional view of the structure of the internal components of the detection shell of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the load-bearing connecting member and the rotating adjustment plate and other components of the present invention;

[0029] Figure 7Schematic diagram of the matching structure of the load-bearing plate and the connecting plate of the present invention Figure 1 ;

[0030] Figure 8 Schematic diagram of the matching structure of the load-bearing plate and the connecting plate of the present invention Figure 2 ;

[0031] Figure 9 This is a schematic diagram of the structure of the rotating adjustment plate and the control assembly components of the present invention.

[0032] In the picture:

[0033] 1. Positioning plate; 2. Detection housing; 3. Cover plate; 4. Detection plug ring; 5. Vertical guide rail; 6. Calibration block; 7. Load-bearing connector; 701. Load-bearing plate; 702. Connecting plate; 8. Rotation adjustment plate; 9. Calibration plate; 10. Bottom plate; 11. Limiting slot; 12. Limiting ring; 13. Angle sensor; 14. Motor 1; 15. Mounting plate; 16. T-pin; 17. Reset spring; 18. Positioning socket; 19. Sliding hole; 20. Adjusting cylinder; 21. Lifting plate; 22. Load-bearing slot; 23. Protective pad; 24. Accommodating slot; 25. Positioning slot; 26. Positioning pin; 27. Compression spring; 28. Adjusting shaft; 29. Motor 2; 30. Rotating shaft; 31. Adjusting rope; 32. Load-bearing frame; 33. Spindle; 34. Adjusting gear; 35. Motor 3; 36. Lifting rack; 37. Sliding block. DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] As attached Figure 1 To the attached Figure 9 As shown:

[0038] Embodiment 1: The present invention provides an ultrasonic flaw detector calibration device, comprising an annularly arranged positioning plates 1, a rotatably connected detection housing 2 with an open top disposed between the positioning plates 1, a cover plate 3 disposed on top of the detection housing 2, a movably connected detection insert ring 4 disposed on the cover plate 3, an ultrasonic probe inserted into the detection insert ring 4, and an annularly arranged calibration block 6 disposed within the detection housing 2;

[0039] It also includes a load-bearing connection member 7, which is installed on the outer wall of one of the positioning plates 1. The load-bearing connection member 7 is provided with a rotation adjustment plate 8 that is rotatably connected. A vertically arranged calibration plate 9 is installed at the other end of the rotation adjustment plate 8, and a control component is set between the calibration plate 9 and the rotation adjustment plate 8.

[0040] It should be noted that, through the detection shell 2, an annularly distributed calibration block 6 is set inside the detection shell 2, and the material and internal structure of each calibration block 6 are different. A cover plate 3 is installed on the top of the detection shell 2, and a detection insert ring 4 is set on the cover plate 3. The ultrasonic probe is inserted downward into the detection shell 2, and the ultrasonic probe verifies the calibration block 6. The ultrasonic probe is checked for accuracy by the connected flaw detector. The motor 14 drives the detection shell 2 to rotate. It is restricted by the positioning plate 1 so that the cover plate 3 does not rotate with the detection shell 2, and drives the next calibration block 6 to rotate under the ultrasonic probe, so that the sensitivity of the ultrasonic probe is verified by different calibration blocks 6, thereby reducing manual participation and improving the accuracy of the ultrasonic probe calibration.

[0041] Moreover, by designing a calibration plate 9 on the device, the calibration plate 9 can be automatically moved up and down through the regulating component, and the ultrasonic probe can be irradiated on it to detect its vertical linear error. Different parameters can be calibrated on the same device, thereby improving the flexibility of the device.

[0042] In this embodiment, a base plate 10 is provided at the bottom of the positioning plate 1, and a limit slot 11 is symmetrically provided on the side of each positioning plate 1 close to the detection shell 2, and a limit ring 12 is symmetrically provided on the outer wall of the detection shell 2. The limit ring 12 is movably clamped in the limit slot 11, and an angle sensor 13 with an external power supply is provided on the top of the positioning plate 1.

[0043] It should be noted that the base plate 10 is fixed on the ground, and the positioning plate 1 is installed on the base plate 10. By setting a limit slot 11 on the positioning plate 1, the limit ring 12 is movably connected in the limit slot 11, so that during the rotation of the detection shell 2, the detection shell 2 will not be displaced in height. An angle sensor 13 is set on the top of the positioning plate 1, and the probe of the angle sensor 13 is facing the detection ring 4. After the ultrasonic probe is inserted into the detection ring 4, the position of the ultrasonic probe can be calibrated in advance through the angle sensor 13 to avoid deviation in its initial position.

[0044] In this embodiment, a motor 14 with an external power supply is provided on the top of the base plate 10, and the output shaft of the motor 14 is connected to the bottom of the detection shell 2. A ring-shaped mounting plate 15 is provided on the top of the upper limit ring 12, and a T-shaped pin 16 with a movable connection is provided on the mounting plate 15. A reset spring 17 is provided on the side of the T-shaped pin 16 close to the cover plate 3. The outer ring wall of the cover plate 3 is provided with spaced positioning holes 18, and the T-shaped pin 16 and the positioning holes 18 cooperate with each other.

[0045] It should be noted that, through the setting of motor 14, motor 14 can drive the detection shell 2 to realize automatic rotation, the limit ring 12 is fixedly connected to the outer wall of the detection shell 2, the mounting plate 15 is installed on the top of the upper limit ring 12, the T-shaped pin 16 is movably set on the mounting plate 15, and a reset spring 17 is set on the T-shaped pin 16. Under normal conditions, the reset spring 17 drives the T-shaped pin 16 to move forward. When the cover plate 3 is covered on the detection shell 2, the T-shaped pin 16 enters the positioning hole 18 in the cover plate 3, thereby connecting the cover plate 3 with the detection shell 2.

[0046] In this embodiment, a sliding hole 19 is provided on the cover plate 3 , and the sliding hole 19 is located directly above the calibration block 6 . The vertical cross-sectional profile of the detection insert ring 4 is “T”-shaped, and the detection insert ring 4 moves in the sliding hole 19 .

[0047] It should be noted that, by setting a sliding hole 19 on the cover plate 3, the detection ring 4 is movably inserted into the sliding hole 19, and the ultrasonic probe is inserted into the detection ring 4 and can move inside the detection ring 4. When the ultrasonic probe needs to be tested, it is inserted downward into the detection ring 4, and the detection ring 4 is moved to move it in the sliding hole 19, thereby moving the ultrasonic probe, and measuring the sensitivity of the ultrasonic probe by moving.

[0048] In this embodiment, an adjusting cylinder 20 is provided on the inner bottom plate 10 of the detection shell 2, a lifting plate 21 is provided at the end of the piston rod of the adjusting cylinder 20, a ring-shaped bearing groove 22 is provided on the top of the lifting plate 21, and a protective pad 23 is provided on the inner opposite side walls of the bearing groove 22. The calibration block 6 is placed in the bearing groove 22 and fits with the protective pad 23.

[0049] It should be noted that, by arranging an adjusting cylinder 20 inside the detection housing 2, the end of the piston rod of the adjusting cylinder 20 is connected to a lifting plate 21, and the top of the lifting plate 21 has an annularly distributed bearing groove 22, and the calibration block 6 is placed in the bearing groove 22. By controlling the height of the piston rod in the adjusting cylinder 20, the height of the lifting plate 21 can be adjusted, and the sensitivity of the probe can be calibrated by adjusting different heights of the calibration block 6;

[0050] Moreover, the material and internal structure of each calibration block 6 are different. After the inspection of a calibration block 6 is completed, the detection shell 2 is rotated to further detect the sensitivity of the ultrasonic probe according to different calibration blocks 6, avoiding excessive manual participation while also improving the accuracy of ultrasonic probe calibration.

[0051] In this embodiment, the bearing connecting member 7 is composed of a bearing plate 701 and a connecting plate 702. The bearing plate 701 is fixedly connected to the outer wall of one of the positioning plates 1. A receiving groove 24 is provided inside the bearing plate 701. The vertical cross-sectional profile of the connecting plate 702 is "L"-shaped. The "L"-shaped transverse section of the connecting plate 702 is inserted into the receiving groove 24. The front and rear side plates of the bearing plate 701 are provided with positioning grooves 25 that are positioned opposite to each other.

[0052] It should be noted that a receiving groove 24 is provided inside the supporting plate 701, and the connecting plate 702 is movably located in the receiving groove 24. The supporting plate 701 and the connecting plate 702 are designed to be detachable, so that when the device is not needed in the future, the supporting plate 701 and the connecting plate 702 can be disassembled and separated, thereby reducing the volume of the device and making it more convenient to carry.

[0053] In this embodiment, the vertical cross-sectional profile of the positioning groove 25 is waist-shaped, and positioning pins 26 are symmetrically arranged in the accommodating groove 24. The positioning pins 26 pass through the connecting plate 702. A clamping spring 27 is provided at the other end of the accommodating groove 24, and the other end of the clamping spring 27 is in contact with the connecting plate 702.

[0054] It should be noted that, by providing a positioning groove 25 on the supporting plate 701, the positioning pin 26 passes through the positioning groove 25 and the connecting plate 702, so that the movement of the connecting plate 702 can be restricted inside the supporting plate 701, so that it will not directly detach from the inside. A clamping spring 27 is installed in the accommodating groove 24, and the other end of the clamping spring 27 abuts against the connecting plate 702. The clamping spring 27 is reset to drive the connecting plate 702 to move forward in the supporting plate 701, and the positioning pin 26 is stuck in the positioning groove 25, thereby fixing the connecting plate 702 and the supporting plate 701.

[0055] In this embodiment, the top of the "L"-shaped vertical section of the connecting plate 702 is inserted into one end of the rotating adjustment plate 8. An adjusting shaft 28 is provided in the rotating adjustment plate 8. The adjusting shaft 28 passes through the connecting plate 702 and is fixedly connected to it. A motor 29 with an external power supply is provided on the top of the rotating adjustment plate 8. The output shaft of the motor 29 is connected to a rotating shaft 30 through a coupling, and an adjusting rope 31 is provided between the rotating shaft 30 and the adjusting shaft 28.

[0056] It should be noted that, by setting an adjustment shaft 28, the connecting plate 702 and the rotating adjustment plate 8 are movably connected. A motor 29 is set on the top of the rotating adjustment plate 8. The output shaft of the motor 29 is connected to the rotating shaft 30 through a coupling. An adjustment rope 31 is set between the rotating shaft 30 and the adjusting shaft 28. When the rotating shaft 30 rotates, the adjustment rope 31 is wound around the rotating shaft 30, and the adjustment rope 31 at the other end is wound out from the rotating shaft 30, thereby driving the rotating shaft 30 to rotate. The angle of the rotating adjustment plate 8 can be controlled, and finally the angle of the calibration plate 9 can be regulated, so that the ultrasonic probe can be calibrated by adjusting different angles.

[0057] In this embodiment, the regulating component includes a supporting frame 32, a main shaft 33 is provided inside the supporting frame 32, an adjusting gear 34 is connected on the main shaft 33 and located inside the supporting frame 32, a motor 35 with an external power supply is provided outside the supporting frame 32, the output shaft of the motor 35 is connected to the main shaft 33 through a coupling, a lifting rack 36 is provided on one side of the adjusting gear 34, a calibration plate 9 is connected to the bottom side wall of the lifting rack 36, a sliding block 37 is provided on the side of the lifting rack 36 away from the adjusting gear 34, a vertical guide rail 5 is provided inside the supporting frame 32, and the sliding block 37 is slidably installed on the vertical guide rail 5.

[0058] It should be noted that when the ultrasonic probe is performing verticality detection, it is no longer inserted into the detection insert ring 4. After its position is fixed, it is aligned with the calibration plate 9. The motor 35 is started and drives the adjustment gear 34 to rotate through the main shaft 33. The lifting rack 36 cooperates with the adjustment gear 34 to drive the lifting rack 36 to move up and down. The lifting rack 36 is connected to the calibration plate 9. The ultrasonic probe is irradiated on the calibration plate 9 to verify its vertical linear error, thereby realizing the verification and calibration of the ultrasonic flaw detector.

[0059] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. Ultrasonic flaw detector calibration device, characterized by: include: Positioning plates (1) are arranged in an annular shape, and a detection housing (2) with a rotatable connection and an open top is provided between the positioning plates (1); a cover plate (3) is provided on the top of the detection housing (2); a detection insert ring (4) is provided on the cover plate (3); an ultrasonic probe is inserted into the detection insert ring (4); and calibration blocks (6) are arranged in an annular shape inside the detection housing (2); The invention also includes a bearing connection member (7), wherein the bearing connection member (7) is installed on the outer wall of one of the positioning plates (1), and a rotation adjustment plate (8) is provided on the bearing connection member (7), and a vertically arranged calibration plate (9) is installed at the other end of the rotation adjustment plate (8), and a regulating component is provided between the calibration plate (9) and the rotation adjustment plate (8).

2. The ultrasonic flaw detector calibration device according to claim 1, characterized in that: The bottom of the positioning plate (1) is provided with a base plate (10), and each positioning plate (1) is symmetrically provided with upper and lower distributed limit slots (11) on one side close to the detection shell (2). The outer wall of the detection shell (2) is symmetrically provided with upper and lower distributed limit rings (12), and the limit rings (12) are movably clamped in the limit slots (11). The top of the positioning plate (1) is provided with an angle sensor (13) for an external power supply.

3. The ultrasonic flaw detector calibration device according to claim 2, characterized in that: A motor (14) with an external power supply is provided on the top of the base plate (10), and the output shaft of the motor (14) is connected to the bottom of the detection housing (2). A ring-shaped mounting plate (15) is provided on the top of the upper limiting ring (12), and a T-shaped latch (16) is provided on the mounting plate (15) for a movable connection. A reset spring (17) is provided on the side of the T-shaped latch (16) close to the cover plate (3). Positioning holes (18) distributed at intervals are provided on the outer ring wall of the cover plate (3), and the T-shaped latch (16) and the positioning holes (18) cooperate with each other.

4. The ultrasonic flaw detector calibration device according to claim 3, characterized in that: The cover plate (3) is provided with a sliding hole (19), and the sliding hole (19) is located directly above the calibration block (6). The vertical cross-sectional profile of the detection insert ring (4) is "T"-shaped, and the detection insert ring (4) moves in the sliding hole (19).

5. The ultrasonic flaw detector calibration device according to claim 1, wherein: An adjusting cylinder (20) is provided on the inner bottom plate (10) of the detection housing (2), a lifting plate (21) is provided at the end of the piston rod of the adjusting cylinder (20), a circularly distributed bearing groove (22) is provided on the top of the lifting plate (21), and protective pads (23) are provided on the inner opposite side walls of the bearing groove (22), and the calibration block (6) is placed in the bearing groove (22) and fits with the protective pad (23).

6. The ultrasonic flaw detector calibration device according to claim 1, characterized in that: The bearing connecting member (7) is composed of a bearing plate (701) and a connecting plate (702), wherein the bearing plate (701) is fixedly connected to the outer side wall of one of the positioning plates (1), an accommodating groove (24) is provided inside the bearing plate (701), the vertical cross-sectional profile of the connecting plate (702) is "L"-shaped, and the "L"-shaped transverse section of the connecting plate (702) is inserted into the accommodating groove (24), and the front and rear side plates of the bearing plate (701) are provided with positioning grooves (25) in opposite positions.

7. The ultrasonic flaw detector calibration device according to claim 6, characterized in that: The vertical cross-sectional profile of the positioning groove (25) is waist-shaped, and positioning pins (26) are symmetrically arranged in the accommodating groove (24), and the positioning pins (26) pass through the connecting plate (702). The other end of the interior of the accommodating groove (24) is provided with a compression spring (27), and the other end of the compression spring (27) abuts against the connecting plate (702).

8. The ultrasonic flaw detector calibration device according to claim 7, characterized in that: The top of the "L"-shaped vertical section of the connecting plate (702) is inserted into one end of the rotating adjustment plate (8), and an adjusting shaft (28) is provided in the rotating adjustment plate (8). The adjusting shaft (28) passes through the connecting plate (702) and is fixedly connected thereto. A second motor (29) with an external power supply is provided on the top of the rotating adjustment plate (8), and a rotating shaft (30) is connected to the output shaft of the second motor (29) via a coupling. An adjusting rope (31) is provided between the rotating shaft (30) and the adjusting shaft (28).

9. The ultrasonic flaw detector calibration device according to claim 1, wherein: The regulating assembly includes a carrying frame (32), a main shaft (33) is provided inside the carrying frame (32), an adjusting gear (34) is connected on the main shaft (33) and located inside the carrying frame (32), a motor (35) with an external power supply is provided outside the carrying frame (32), the output shaft of the motor (35) is connected to the main shaft (33) through a coupling, a lifting rack (36) is provided on one side of the adjusting gear (34), the calibration plate (9) is connected to the bottom side wall of the lifting rack (36), a sliding block (37) is provided on the side of the lifting rack (36) away from the adjusting gear (34), a vertical guide rail (5) is provided inside the carrying frame (32), and the sliding block (37) is slidably installed on the vertical guide rail (5).

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