An eddy current probe for detecting defects in coated metals based on multi-frequency aliasing technology

Abstract

This utility model discloses an eddy current probe for detecting defects in coated metals based on multi-frequency cascading technology, including a detection device. The detection device consists of a support, a detection platform, and a detector. The detector consists of a mounting frame, a telescopic rod, a mounting plate, and a detection head. The bottom end of the mounting frame is mounted on the upper side of a second moving mechanism, the second moving mechanism is mounted in the middle of the upper end of the detection platform, and the bottom end of the support is mounted on the bottom end of the detection platform. A first moving mechanism is installed between the upper ends of the support, and clamping plates are installed at both ends below the first moving mechanism. A rotating mechanism is installed at the upper end of the clamping plates, and a guiding mechanism is installed between the clamping plates and the support. The first moving mechanism at the upper end of the support can drive the clamping plates at both ends to move closer or further apart, thereby clamping and fixing tubular materials of different diameters. The rotating mechanism on the clamping plates can drive the tubular material to rotate, enabling the detection head to perform 360° omnidirectional detection on the tubular material.

Description

Technical Field

[0001] This utility model relates to the field of metal defect detection technology, specifically an eddy current probe for detecting metal defects under coatings based on multi-frequency cascading technology. Background Technology

[0002] Metal defect detection is a core technology in the industrial field to ensure the quality and safety of metal materials, components and products. It mainly uses physical, chemical or non-destructive testing methods to identify internal or surface defects that occur in metals during smelting, processing, welding and use, so as to avoid structural failure, safety accidents or substandard performance caused by defects.

[0003] Chinese Patent No. 202321563795.8 discloses a metal weld array detection probe, including a main body with a T-shaped structure. The lower ends of the two opposite sides of the vertical section are provided with snap-fit ​​grooves, and the lower end of the vertical section is provided with a detection end. It also includes two sets of symmetrically arranged support components. The support components are located at the lower end of the vertical section of the main body and include a support block, a roller mechanism, and an adjustment mechanism. The lower edge of the support block is connected to the lower edge of the vertical section of the main body by a hinge. The lower side is provided with a receiving groove, and the upper side is provided with an embedding groove.

[0004] When this utility model is used, the detection location is relatively limited, and it cannot perform comprehensive detection of the pipeline during the detection process, which affects the detection effect of the pipeline. Utility Model Content

[0005] The purpose of this invention is to provide an eddy current probe for detecting defects in coated metals based on multi-frequency cascading technology, in order to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an eddy current probe for detecting defects in coated metals based on multi-frequency aliasing technology, comprising a detection device; the detection device consists of a bracket, a detection platform, and a detector; the detector consists of a mounting frame, a telescopic rod, a mounting plate, and a detection head; the detection head is mounted on the upper side of the mounting plate; the mounting plate is mounted on the front end of the telescopic rod; the bottom end of the telescopic rod is mounted on both sides of the upper end of the mounting frame; the bottom end of the mounting frame is mounted on the upper side of a second moving mechanism; the second moving mechanism is mounted in the middle of the upper end of the detection platform; the bottom end of the bracket is mounted on the bottom end of the detection platform; a first moving mechanism is installed between the upper ends of the bracket; clamping plates are installed at both ends below the first moving mechanism; a rotating mechanism is installed at the upper end of the clamping plates; a guiding mechanism is installed between the clamping plates and the bracket; a controller is installed on one side of the detection platform; a buzzer is installed on the upper side of the controller; and a wireless transceiver module is installed on the upper side of the controller above the buzzer.

[0007] Preferably, a display is mounted on the upper side of the controller, and control buttons are mounted on the upper side of the controller to the side of the display.

[0008] Preferably, a ball bearing is slidably mounted on the bottom end of the mounting bracket, and the ball bearing is slidably connected to the testing table.

[0009] Preferably, the second moving mechanism consists of a lead screw, a second lead screw nut, and a second power mechanism. The lead screw is rotatably mounted on the middle of the upper side of the detection platform. One end of the lead screw passes through the detection platform and is mounted at the front end of the second power mechanism. The second power mechanism is mounted on one side of the detection platform. The second lead screw nut is threaded onto the outer side of the lead screw, and the upper end of the second lead screw nut is mounted on the bottom of the detector.

[0010] Preferably, the first moving mechanism consists of a bidirectional lead screw, a first lead screw nut, and a first power mechanism. The bidirectional lead screw is rotatably mounted between the supports. One end of the bidirectional lead screw passes through the support and is mounted on the upper side of the first power mechanism. The first power mechanism is mounted on one side of the support. The first lead screw nut is rotatably mounted on both sides of the upper end of the bidirectional lead screw and is mounted on the upper end of the clamping plate.

[0011] Preferably, both the first power mechanism and the second power mechanism consist of a first motor and a gearbox, with the first motor mounted on one side of the gearbox.

[0012] Preferably, the rotating mechanism consists of a conical clamping plate and a second motor. The conical clamping plate is rotatably mounted on the inner side of the clamping plate, and one end of the conical clamping plate is mounted on the front end of the second motor, while the second motor is mounted on one side of the clamping plate.

[0013] Preferably, the guiding mechanism consists of a through hole and a guide rod. The through hole is located on the upper side of the clamping plate, and the guide rod passes through both ends of the through hole and is installed on the inner side of the bracket.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The first moving mechanism at the upper end of the bracket can drive the two clamping plates to move closer or further apart, thereby clamping and fixing tubular materials of different diameters; the rotating mechanism on the clamping plate can drive the tubular material to rotate, so that the detection head can perform 360° all-round detection on the tubular material.

[0016] 2. The ball bearings at the bottom of the mounting frame form a sliding connection with the testing table. When the second moving mechanism drives the mounting frame to move, the ball bearings convert the sliding friction between the mounting frame and the testing table into rolling friction, which greatly reduces the friction force and makes the movement of the mounting frame smoother and more stable. This ensures that the testing head maintains a stable testing state during the moving testing process and improves the testing accuracy.

[0017] 3. The two ends of the guide rod are fixed to the inside of the bracket to form a stable guide track. The through hole on the upper side of the clamping plate is fitted onto the guide rod. When the first moving mechanism drives the clamping plate to move, the through hole slides along the guide rod. The guide rod restricts and guides the movement direction of the clamping plate, preventing the clamping plate from shifting or rotating during the movement, ensuring that the clamping plate always maintains stable horizontal movement, and ensuring the clamping accuracy of tubular materials and the stability of the detection process.

[0018] 4. The conical clamping plate contacts the end of the tubular material. Its conical structure can adapt to tubular materials of different diameters, ensuring the stability of clamping. When the second motor starts, its output shaft drives the conical clamping plate connected to it to rotate. Since the tubular material is clamped and fixed by the conical clamping plates on both sides, under the action of friction, the tubular material rotates synchronously with the conical clamping plate, so that the detection head can perform all-round, no-dead-angle detection on the circumference of the tubular material. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the first moving mechanism of this utility model;

[0022] Figure 3 This is a side view of the structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the detector of this utility model.

[0024] In the diagram: 1. Detection device; 2. Support; 3. First moving mechanism; 4. Bidirectional lead screw; 5. First lead screw nut; 6. First power mechanism; 7. Clamping plate; 8. Rotating mechanism; 9. Conical clamping plate; 10. Second motor; 11. Detection table; 12. Moving mechanism; 13. Second lead screw nut; 14. Detector; 15. Lead screw; 16. Second power mechanism; 17. Gearbox; 18. First motor; 19. Buzzer; 20. Mounting bracket; 21. Controller; 22. Display; 23. Control buttons; 24. Wireless transceiver module; 25. Guide mechanism; 26. Guide rod; 27. Through hole; 28. Ball bearing; 29. ​​Detection head; 30. Mounting plate; 31. Telescopic rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 In this embodiment of the present invention, an eddy current probe for detecting defects in coated metals based on multi-frequency aliasing technology includes a detection device 1. The detection device 1 consists of a bracket 2, a detection platform 11, and a detector 14. The detector 14 consists of a mounting frame 20, a telescopic rod 31, a mounting plate 30, and a detection head 29. The detection head 29 is mounted on the upper side of the mounting plate 30, the mounting plate 30 is mounted on the front end of the telescopic rod 31, the bottom end of the telescopic rod 31 is mounted on both sides of the upper end of the mounting frame 20, the bottom end of the mounting frame 20 is mounted on the upper side of the second moving mechanism 12, the second moving mechanism 12 is mounted in the middle of the upper end of the detection platform 11, the bottom end of the bracket 2 is mounted on the bottom end of the detection platform 11, a first moving mechanism 3 is mounted between the upper ends of the bracket 2, clamping plates 7 are mounted at both ends below the first moving mechanism 3, a rotating mechanism 8 is mounted on the upper end of the clamping plate 7, a guide mechanism 25 is mounted between the clamping plate 7 and the bracket 2, a controller 21 is mounted on one side of the detection platform 11, a buzzer 19 is mounted on the upper side of the controller 21, and a wireless transceiver module 24 is mounted on the upper side of the controller 21 above the buzzer 19. A display 22 is mounted on the upper side of the controller 21, and control buttons 23 are mounted on the upper side of the controller 21 to the side of the display 22. The display 22 on the controller 21 is used to display various parameters, images and test results in real time during the detection process, so as to present the defect information of tubular materials in a convenient and intuitive way. The control buttons 23 allow the operator to manually input commands to control the detection mode, parameter settings, equipment start and stop, etc., thereby enhancing the convenience of human-machine interaction.

[0027] A ball bearing 28 is slidably mounted on the bottom of the mounting frame 20. The ball bearing 28 is slidably connected to the detection table 11. When the second moving mechanism 12 drives the mounting frame 20 to move, the ball bearing 28 converts the sliding friction between the mounting frame 20 and the detection table 11 into rolling friction, which greatly reduces the friction force and makes the movement of the mounting frame 20 smoother and more stable. This ensures that the detection head 29 maintains a stable detection state during the moving detection process and improves the detection accuracy.

[0028] The second moving mechanism 12 consists of a lead screw 15, a second lead screw nut 13, and a second power mechanism 16. The lead screw 15 is rotatably mounted on the middle of the upper side of the detection table 11. One end of the lead screw 15 passes through the detection table 11 and is mounted at the front end of the second power mechanism 16. The second power mechanism 16 is mounted on one side of the detection table 11. The second lead screw nut 13 is threaded onto the outside of the lead screw 15. The upper end of the second lead screw nut 13 is mounted on the bottom end of the detector 14. The second power mechanism 16 provides driving force, causing the lead screw 15 to rotate in the middle of the upper side of the detection table 11. Since the second lead screw nut 13 is threaded to the lead screw 15 and the upper end of the second lead screw nut 13 is fixed to the bottom end of the detector 14, when the lead screw 15 rotates, the second lead screw nut 13 will move linearly along the axial direction of the lead screw 15, thereby causing the detector 14 to move laterally along the detection table 11, realizing the scanning detection of the detection head 29 in the axial direction of the tubular material.

[0029] The first moving mechanism 3 consists of a bidirectional lead screw 4, a first lead screw nut 5, and a first power mechanism 6. The bidirectional lead screw 4 is rotatably mounted between the supports 2. One end of the bidirectional lead screw 4 passes through the support 2 and is mounted on the upper side of the first power mechanism 6. The first power mechanism 6 is mounted on one side of the support 2. The first lead screw nut 5 is rotatably mounted on both sides of the upper end of the bidirectional lead screw 4 and is mounted on the upper end of the clamping plate 7. The first power mechanism 6 drives the bidirectional lead screw 4 to rotate between the supports 2. The threads at both ends of the bidirectional lead screw 4 are in opposite directions. Since the first lead screw nuts 5 are respectively mounted at both ends of the bidirectional lead screw 4 and connected to the upper end of the clamping plate 7, when the bidirectional lead screw 4 rotates, the two first lead screw nuts 5 will move simultaneously towards the middle or both ends under the action of the threads, thereby driving the clamping plates 7 on both sides to move closer or further away synchronously, realizing the clamping and releasing operation of tubular materials of different diameters.

[0030] Both the first power mechanism 6 and the second power mechanism 16 consist of a first motor 18 and a gearbox 17. The first motor 18 is mounted on one side of the gearbox 17. In the first power mechanism 6 and the second power mechanism 16, the first motor 18 serves as the power source, providing the initial speed and torque. The gearbox 17 adjusts the output speed of the first motor 18. By changing the transmission ratio, the high speed and low torque of the motor are converted into low speed and high torque to meet the needs of the mechanism or adjusted to a suitable speed, ensuring that the first moving mechanism 3 and the second moving mechanism 12 can drive the movement of the relevant components smoothly and accurately.

[0031] The rotating mechanism 8 consists of a conical clamping plate 9 and a second motor 10. The conical clamping plate 9 is rotatably mounted inside the clamping plate 7. One end of the conical clamping plate 9 is mounted on the front end of the second motor 10. The second motor 10 is mounted on one side of the clamping plate 7. The conical clamping plate 9 contacts the end of the tubular material. Its conical structure can adapt to tubular materials of different diameters and ensure the stability of clamping. When the second motor 10 is started, its output shaft drives the conical clamping plate 9 connected to it to rotate. Since the tubular material is clamped and fixed by the conical clamping plates 9 on both sides, under the action of friction, the tubular material rotates synchronously with the conical clamping plate 9, so that the detection head 29 can perform all-round, no-dead-angle detection on the circumference of the tubular material.

[0032] The guiding mechanism 25 consists of a through hole 27 and a guide rod 26. The through hole 27 is located on the upper side of the clamping plate 7. The guide rod 26 passes through the through hole 27 and is installed on the inner side of the bracket 2 at both ends. The two ends of the guide rod 26 are fixed to the inner side of the bracket 2 to form a stable guide track. The through hole 27 on the upper side of the clamping plate 7 is sleeved on the guide rod 26. When the first moving mechanism 3 drives the clamping plate 7 to move, the through hole 27 slides along the guide rod 26. The guide rod 26 restricts and guides the movement direction of the clamping plate 7, preventing the clamping plate 7 from deviating or rotating during the movement, ensuring that the clamping plate 7 always maintains stable horizontal movement, and ensuring the clamping accuracy of tubular materials and the stability of the detection process.

[0033] The working principle and usage process of this utility model are as follows: The support frame 2 provides stable support for the entire device; the detection platform 11 serves as a bearing platform for placing tubular materials; the detector 14 is responsible for performing specific detection tasks; its detection head 29 adopts an eddy current probe for detecting metal defects under coatings based on multi-frequency aliasing technology. Utilizing the eddy current detection principle, through multi-frequency signal aliasing processing, it can penetrate the surface coating of the tubular material and accurately identify metal defects under the coating. During operation, the mounting frame 20 provides a mounting base for the telescopic rod 31, which can flexibly extend and retract, driving the detection head 29 on the front mounting plate 30 to adjust its height position, ensuring a suitable detection distance from the tubular material. The second moving mechanism 12 at the bottom of the mounting frame 20 can… The drive detector 14 moves laterally along the detection table 11 to achieve detection coverage of tubular materials at different axial positions. At the same time, the first moving mechanism 3 at the upper end of the bracket 2 can drive the clamping plates 7 at both ends to move closer or further apart, thereby clamping and fixing tubular materials of different diameters. The rotating mechanism 8 on the clamping plate 7 can drive the tubular material to rotate, so that the detection head 29 can perform 360° all-round detection on the tubular material. The guide mechanism 25 ensures that the clamping plate 7 maintains stable horizontal movement during the movement. The controller 21, as the core control unit, coordinates the actions of each mechanism. When a defect is detected, the controller 21 triggers the buzzer 19 to issue an alarm, and at the same time transmits the detection data to external devices in real time through the wireless transceiver module 24.

[0034] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An eddy current probe for detecting defects in coated metals based on multi-frequency aliasing technology, comprising a detection device (1); characterized in that: The detection device (1) consists of a bracket (2), a detection platform (11), and a detector (14). The detector (14) consists of a mounting frame (20), a telescopic rod (31), a mounting plate (30), and a detection head (29). The detection head (29) is mounted on the upper side of the mounting plate (30). The mounting plate (30) is mounted on the front end of the telescopic rod (31). The bottom end of the telescopic rod (31) is mounted on both sides of the upper end of the mounting frame (20). The bottom end of the mounting frame (20) is mounted on the upper side of the second moving mechanism (12). The second moving mechanism (12) is mounted on the upper end of the detection platform (11). In the middle, the bottom end of the bracket (2) is installed at the bottom end of the testing platform (11), the upper end of the bracket (2) is installed with a first moving mechanism (3), the lower ends of the first moving mechanism (3) are installed with clamps (7), the upper end of the clamps (7) is installed with a rotating mechanism (8), the clamps (7) and the bracket (2) are installed with a guide mechanism (25), the side of the testing platform (11) is installed with a controller (21), the upper side of the controller (21) is installed with a buzzer (19), and the upper side of the controller (21) is installed above the buzzer (19) with a wireless transceiver module (24).

2. The eddy current probe for detecting defects in coated metals based on multi-frequency aliasing technology according to claim 1, characterized in that: A display (22) is mounted on the upper side of the controller (21), and control buttons (23) are mounted on the upper side of the controller (21) on one side of the display (22).

3. The eddy current probe for detecting defects in coated metals based on multi-frequency aliasing technology according to claim 1, characterized in that: The mounting bracket (20) has a ball bearing (28) slidably mounted on its bottom end, and the ball bearing (28) is slidably connected to the testing table (11).

4. The eddy current probe for detecting defects in coated metals based on multi-frequency aliasing technology according to claim 1, characterized in that: The second moving mechanism (12) consists of a lead screw (15), a second lead screw nut (13), and a second power mechanism (16). The lead screw (15) is rotatably mounted on the middle of the upper side of the detection table (11). One end of the lead screw (15) passes through the detection table (11) and is mounted at the front end of the second power mechanism (16). The second power mechanism (16) is mounted on one side of the detection table (11). The second lead screw nut (13) is threaded onto the outside of the lead screw (15). The upper end of the second lead screw nut (13) is mounted on the bottom end of the detector (14).

5. The eddy current probe for detecting metal defects under coatings based on multi-frequency aliasing technology according to claim 4, characterized in that: The first moving mechanism (3) consists of a bidirectional lead screw (4), a first lead screw nut (5) and a first power mechanism (6). The bidirectional lead screw (4) is rotatably installed between the brackets (2). One end of the bidirectional lead screw (4) passes through the bracket (2) and is installed on the upper side of the first power mechanism (6). The first power mechanism (6) is installed on one side of the bracket (2). The first lead screw nut (5) is rotatably installed on both sides of the upper end of the bidirectional lead screw (4). The first lead screw nut (5) is installed on the upper end of the clamping plate (7).

6. The eddy current probe for detecting defects in coated metals based on multi-frequency aliasing technology according to claim 5, characterized in that: The first power mechanism (6) and the second power mechanism (16) are both composed of a first motor (18) and a gearbox (17), with the first motor (18) mounted on one side of the gearbox (17).

7. The eddy current probe for detecting defects in coated metals based on multi-frequency aliasing technology according to claim 1, characterized in that: The rotating mechanism (8) consists of a conical clamp (9) and a second motor (10). The conical clamp (9) is rotatably mounted on the inner side of the clamp (7). One end of the conical clamp (9) is mounted on the front end of the second motor (10), and the second motor (10) is mounted on one side of the clamp (7).

8. The eddy current probe for detecting defects in coated metals based on multi-frequency aliasing technology according to claim 1, characterized in that: The guiding mechanism (25) consists of a through hole (27) and a guide rod (26). The through hole (27) is located on the upper side of the clamping plate (7), and the guide rod (26) passes through the through hole (27) and is installed on the inner side of the bracket (2) at both ends.

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