A multi-head probe for an ultrasonic flaw detector

Abstract

This application discloses a multi-head probe for an ultrasonic flaw detector, relating to the field of ultrasonic flaw detection. It includes two fixed plates and an auxiliary plate. One side of the fixed plate is equipped with a detection mechanism for flaw detection, and one end of the fixed plate is equipped with an adjustment mechanism to ensure the probe remains in contact with the material. One side of the auxiliary plate is equipped with a moving mechanism for autonomously moving the probe. This application utilizes the adjustment mechanism, through the cooperation of a telescopic rod and a return spring, to enable the probe to adapt to materials of different thicknesses or uneven surfaces, maintaining a tight fit at all times. This ensures that ultrasonic signals can be efficiently transmitted into the material, reducing signal loss. By rotating the rotating column, the probe can be replaced, allowing for sequential detection of different parts of the object. Unlike single-head probes, it eliminates the need for frequent replacements to adapt to different shapes or structures, reducing the time spent disassembling old probes, installing new probes, and debugging, thereby significantly improving overall detection efficiency.

Description

Technical Field

[0001] This application relates to the field of ultrasonic flaw detection, and in particular to a multi-head probe for an ultrasonic flaw detector. Background Technology

[0002] Ultrasonic testing is a method of detecting defects by utilizing the ability of ultrasonic waves to penetrate deep into metal workpieces and to reflect at the interface when they travel from one medium to another. When the ultrasonic beam emitted by the probe encounters a defect inside the metal workpiece, it generates a reflected wave, which forms a pulse waveform on the fluorescent screen. Based on the position, height, and dynamic shape of these pulse waveforms, the location and magnitude of the defect can be determined, and its nature can be further inferred.

[0003] Currently available ultrasonic probes are single-head probes. For objects with complex shapes or diverse internal structures, different probes need to be replaced for flaw detection. Each probe replacement takes time, including disassembling the old probe, installing the new probe, and calibration and debugging. These operations significantly increase the detection time and reduce the overall detection efficiency. In addition, when using existing ultrasonic flaw detectors, the inspection personnel need to hold the ultrasonic probe and slide it on the board. Hand tremors can easily cause the probe to be out of sync with the board, thus affecting the accuracy of flaw detection. Utility Model Content

[0004] To address the issues of increased testing time due to probe replacement and probes not being on the same horizontal plane as the material, this application provides a multi-head probe for an ultrasonic flaw detector.

[0005] The multi-head probe for an ultrasonic flaw detector provided in this application adopts the following technical solution:

[0006] A multi-head probe for an ultrasonic flaw detector includes two fixed plates and an auxiliary plate, wherein one side of the fixed plate is provided with a detection mechanism for flaw detection.

[0007] One end of the fixing plate is provided with an adjustment mechanism for keeping the fixing plate always in contact with the material.

[0008] One side of the auxiliary plate is provided with a moving mechanism for enabling the fixed plate to move autonomously.

[0009] By adopting the above technical solution, the fixed plate is used to connect the detection mechanism and the adjustment mechanism. The detection mechanism is used to perform flaw detection on different materials or for different requirements by using different probes. The adjustment mechanism ensures that the fixed plate can always fit tightly against the surface of the board, adapt to boards of different thicknesses or unevenness, and improve detection accuracy. The moving mechanism enables the fixed plate to move autonomously, covering a larger detection area and improving detection efficiency.

[0010] Preferably, the detection mechanism includes a rotating column rotatably connected to the surface of a fixed plate, a probe assembly is provided on the outer surface of the rotating column, a rotating block is fixedly connected to one side of the rotating column, an auxiliary rod is fixedly connected to the surface of the fixed plate, a stop rod is rotatably connected to one end of the auxiliary rod, and a sliding groove is provided inside the rotating column.

[0011] By adopting the above technical solution, the rotating column is used to provide support for the probe group, which is the core component and contains multiple crystals for transmitting and receiving ultrasonic signals to detect internal defects in materials. The rotating block is used to rotate the rotating column to replace different probes. The stop bar is used to block the rotation of the rotating block to ensure that the probe does not deviate during use. The auxiliary plate is used to support and fix the fixing plate, adjustment mechanism and moving mechanism to ensure the stability and functionality of the overall structure. The slide groove is used to limit the rotation of the probe and avoid excessive winding of the wiring.

[0012] Preferably, the adjustment mechanism includes a connecting plate fixedly connected to one end of the fixed plate, and two telescopic rods are fixedly connected to the end of the connecting plate away from the fixed plate.

[0013] By adopting the above technical solution, the connecting plate 1 serves as the connecting base of the adjustment mechanism, and the telescopic rod 1 provides the telescopic function for the fixed plate to adapt to plates of different thicknesses.

[0014] Preferably, a second connecting plate is fixedly connected between the ends of the two telescopic rods away from the first connecting plate, and two return springs are fixedly connected between the first connecting plate and the second connecting plate.

[0015] By adopting the above technical solution, the return spring provides elastic return force when the telescopic rod extends or retracts, ensuring that the fixing plate always adheres to the surface of the plate.

[0016] Preferably, the connecting plate 2 is internally threaded with a threaded rod 1, and a handle 1 is fixedly connected to the side of the threaded rod 1 away from the connecting plate 2.

[0017] By adopting the above technical solution, the threaded rod 1 can adjust the position of the connecting plate 2 by rotating it, thereby adjusting the height of the fixed plate. The handle 1 allows for easy manual rotation of the threaded rod 1, achieving precise adjustment.

[0018] Preferably, two telescopic rods are fixedly connected between the connecting plate and the auxiliary plate.

[0019] By adopting the above technical solution, the telescopic rod 2 provides additional support and adjustment functions, enhances the stability of the adjustment mechanism, and prevents the fixed plate from shifting or shaking during movement.

[0020] Preferably, the moving mechanism includes an auxiliary block fixedly connected to the bottom surface of the auxiliary plate, a bidirectional screw is rotatably connected inside the auxiliary block, a moving plate is threadedly connected to the outer surfaces of both ends of the bidirectional screw, and a limit plate is fixedly connected to both ends of the bidirectional screw.

[0021] By adopting the above technical solution, the auxiliary block provides a supporting foundation for the moving mechanism. The bidirectional screw drives the moving plate to move by rotating. The moving plate moves by rotating the bidirectional screw. Thus, the fixed plate is snapped onto the plate to be detected. The limiting plate restricts the range of movement of the moving plate and prevents excessive movement.

[0022] Preferably, one end of the bidirectional screw is fixedly connected to a handle, and the end of the movable plate away from the bidirectional screw is rotatably connected to a roller.

[0023] By adopting the above technical solution, the handle can be manually rotated to control the movement of the moving mechanism, and the roller is used to control the autonomous movement of the probe.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By rotating the rotating column, the probes used can be replaced, and different parts of the object can be inspected sequentially. Unlike single-head probes, there is no need to frequently change them to adapt to the inspection needs of different shapes or structures. This reduces the time spent disassembling old probes, installing new probes, and calibration and debugging, thereby significantly improving the overall inspection efficiency.

[0026] 2. With the help of the adjustment mechanism, the probe can adapt to different thicknesses or uneven plates by means of the telescopic rod and the return spring, and always maintain a tight fit. This ensures that the ultrasonic signal can be efficiently transmitted into the material, reducing signal loss. The tight fit also ensures stable transmission of the ultrasonic signal, improving the accuracy and reliability of defect detection.

[0027] 3. The rollers enable the probe to move autonomously. Compared to traditional manual operation, the rollers ensure that the probe moves at a constant speed, avoiding detection errors caused by uneven speed in manual operation. In addition, the rollers ensure that the probe maintains stable contact with the board surface, avoiding poor contact caused by uneven pressure in manual operation. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application;

[0029] Figure 2 This is a schematic diagram showing the connection structure of the testing institutions in this application;

[0030] Figure 3This is a schematic diagram of the internal structure of the rotating column in this application;

[0031] Figure 4 This is a schematic diagram of the connection structure of the mobile mechanism in this application;

[0032] Figure 5 This is a schematic diagram of the connection structure of the regulating mechanism in this application.

[0033] Reference numerals: 1. Fixing plate;

[0034] 21. Connecting plate one; 22. Telescopic rod one; 23. Return spring; 24. Connecting plate two; 25. Telescopic rod two; 26. Threaded rod one; 27. Handle one;

[0035] 3. Auxiliary board;

[0036] 41. Auxiliary block; 42. Two-way screw; 45. Limiting plate; 46. Handle II; 47. Moving plate; 48. Roller;

[0037] 51. Rotating column; 52. Probe assembly; 53. Rotating block; 54. Auxiliary rod; 55. Stop bar; 56. Slide groove. Detailed Implementation

[0038] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0039] This application discloses a multi-head probe for an ultrasonic flaw detector.

[0040] Reference Figures 1 to 3A multi-head probe for an ultrasonic flaw detector includes two fixed plates 1 and an auxiliary plate 3. A detection mechanism is mounted on one side of each fixed plate 1. The detection mechanism includes a rotating column 51 rotatably connected to the center point of the opposing surfaces of the two fixed plates 1. The middle section of the rotating column 51 is rectangular for connecting the probe, and the interior of the rotating column 51 is hollow for threading probe wiring. Protrusions are provided at the bottom ends of the arc surfaces at both ends of the rotating column 51. A probe assembly 52 is mounted on the plane of the rotating column 51. The probe assembly 52 includes at least three probes with different refraction angles. The first probe allows ultrasonic waves to enter the plate at a refraction angle of 65°–75°, used to detect damage at the head of the plate. The second probe allows ultrasonic waves to enter the plate at a refraction angle of 37°–45°, used to detect screw hole cracks. The third probe allows ultrasonic waves to enter the plate vertically, used to detect damage at the waist of the plate and horizontal cracks in screw holes. The probes are designed with a perpendicular angle between them. The probe wiring is located inside the rotating column 51 and passes through the interior of the rotating column 51 to connect with the ultrasonic transmitter. The probe is threaded and threaded into the plane of the rotating column 51 to ensure the stability of the probe. A rotating block 53 is fixedly connected to the outer surface of one end of the rotating column 51. The rotating block 53 has grooves around its perimeter, which correspond to the positions of the probes in the probe assembly 52. ​​An auxiliary rod 54 is fixedly connected above the center of the side of the fixing plate 1 near the rotating block 53. A stop rod 55 is rotatably connected to the end of the auxiliary rod 54 away from the fixing plate 1. The stop rod 55 can be engaged in the groove to ensure the fixation of the probe. A sliding groove 56 is provided on the bottom surface of the inner wall of the rotating column 51. The sliding groove 56 is semi-circular. The protrusions at both ends of the rotating column 51 are slidably connected inside the sliding groove 56, and the protrusions and the sliding groove 56 are slidably adapted to each other.

[0041] In use, since the middle section of the rotating column 51 is rectangular and hollow, and the probe assembly 52 is equipped with several different ultrasonic probes, the probe wires, which are threaded through the interior of the rotating column 51, are then passed through an opening at one end of the rotating column 51 (the side not on the rotating block 53). They are then connected via a waterproof aviation connector (such as an M12-X coded socket), with each cable labeled with its corresponding probe angle (e.g., "65°-CH1") for easy matching with the flaw detector channels. The waterproof aviation connector is then connected to the multi-channel interface of the flaw detector for operation. Personnel select a probe according to actual needs. After determining the probe to be used, they hold the stop lever 55 and push it upward to remove the limit on the rotating block 53. Then, they rotate the rotating block 53, which drives the rotating column 51 to rotate. This rotates the probe to be used directly below the rotating column 51. Due to the presence of the semi-circular groove 56, the rotating column 51 can only rotate 180 degrees, preventing the probe wiring from becoming overly tangled. Then, they push the stop lever 55 into the groove opened in the rotating block 53 to fix the probe.

[0042] refer to Figure 1 , Figure 4 An adjustment mechanism is provided on the top surface of the fixed plate 1. The adjustment mechanism includes a connecting plate 21 fixedly connected to the top surfaces of the two fixed plates 1. The two ends of the top surface of the connecting plate 21 are fixedly fixed to the fixed ends of the telescopic rod 22. The movable ends of the two telescopic rods 22 away from the connecting plate 21 are fixedly connected to the connecting plate 24. The two ends of the top surface of the connecting plate 21 are fixedly connected to the return spring 23. The end of the return spring 23 away from the connecting plate 21 is fixedly connected to the bottom surface of the connecting plate 24. The two return springs 23 are located at... Between the two telescopic rods 22, a threaded rod 26 is threaded through the center point of the connecting plate 24. The outer surface of the threaded rod 26 away from the connecting plate 24 is threaded through the interior of the auxiliary plate 3. A handle 27 is fixedly connected to the outer surface of the threaded rod 26 away from the connecting plate 24. The two ends of the top surface of the connecting plate 24 are fixedly connected to the fixed ends of the telescopic rod 25. The movable end of the telescopic rod 25 is fixedly connected to the bottom surface of the auxiliary plate 3. The threaded rod 26 is located between the two telescopic rods 25.

[0043] When it is necessary to adjust the distance between the fixed plate 1 and the plate to be inspected, the operator holds the handle 27 and rotates it, which in turn drives the threaded rod 26 to rotate. The threaded rod 26 rotates clockwise and drives the connecting plate 24 downward. Conversely, the threaded rod 26 rotates counterclockwise and drives the connecting plate 24 upward. When the connecting plate 24 moves downward, it will stretch the two telescopic rods 25 to ensure that the connecting plate 24 does not tilt when it moves.

[0044] Reference Figure 5 The bottom surface of the auxiliary plate 3 is provided with moving mechanisms on both sides, and the fixed plate 1 and the adjustment mechanism are located between the two moving mechanisms. The moving mechanism includes an auxiliary block 41 fixedly connected to the center of both sides of the bottom surface of the auxiliary plate 3. A bidirectional screw 42 is rotatably connected through the center of the auxiliary block 41. Moving plates 47 are slidably connected through the outer surfaces of both ends of the bidirectional screw 42, and the moving plates 47 are slidably connected to the bottom surface of the auxiliary plate 3. The bidirectional screw 42 is used to control the two moving plates 47 to move in opposite directions. Limiting plates 45 are fixedly connected to the planes of both ends of the bidirectional screw 42. A handle 46 is fixedly connected through the limiting plate 45 at one end of the bidirectional screw 42. A roller 48 is rotatably connected through the bottom surface of the moving plate 47. The roller 48 is a rubber wheel, and a rubber convex ring is provided on the outer surface of the roller 48 to maintain friction with the plate and prevent slippage.

[0045] In use, the operator places the fixed plate 1 on the surface of the material to be tested and places the moving mechanism on both sides of the material. Then, the operator rotates the handle 46 clockwise, which drives the bidirectional screw 42 to rotate, thereby causing the two moving plates 47 to move towards each other. Conversely, the operator rotates the handle 46 counterclockwise, which drives the two moving plates 47 to move in opposite directions. Then, the moving plates 47 move towards each other and drive the rollers 48 to fit against both sides of the material. The outer surface of the rollers 48 is provided with rubber convex rings to increase the friction between them and the material, prevent slippage, and maintain the stability of the entire device.

[0046] The interior of the movable plate 47 is hollow, and a geared motor is fixedly installed inside the movable plate 47. The output shaft of the geared motor is fixedly connected to the roller 48. A switch and power supply are provided on the top surface of the auxiliary plate 3. Starting from the power supply, a main line is arranged along the top surface of the auxiliary plate 3. This main line transmits power to the two movable plates 47. On the top surface of the auxiliary block 41, the main line is divided into two branch lines, which are connected to the two movable plates 47 respectively. The branch lines are connected to the geared motors inside the movable plate 47 to ensure a firm connection and good contact. The four geared motors are started and stopped simultaneously by the PLC control device.

[0047] Then, pressing the switch causes the PLC control device to control four synchronous motors to rotate simultaneously, thereby driving the roller 48 to rotate. This allows the probe to move autonomously, avoiding detection errors caused by uneven speed during manual operation. The roller 48 is a rubber wheel with rubber protrusions on its outer surface to increase friction with the plate. The roller 48 ensures that the probe maintains stable contact with the plate surface, avoiding poor contact caused by uneven pressure during manual operation.

[0048] The implementation principle of a multi-head probe for an ultrasonic flaw detector according to an embodiment of this application is as follows:

[0049] When in use, the operator rotates the stop lever 55 to remove the limit on the rotating block 53, then rotates the rotating block 53 to rotate the probe to be used directly below the rotating column 51, and then moves the stop lever 55 into the groove to fix the probe.

[0050] The staff places the moving mechanism on both sides of the board. Then, they turn the handle 46 clockwise to drive the bidirectional screw 42 to rotate, control the moving plate 47 to move towards each other, and drive the roller 48 to fit against both sides of the board. Then, they press the switch to control the motor to drive the roller 48 to rotate, thereby driving the entire device to move.

[0051] When driving the entire device to move, adjust the distance between the fixed plate 1 and the plate to be inspected according to actual needs: the operator turns the handle 27 to drive the connecting plate 24 to move downward and stretch the telescopic rod 25 to ensure that the connecting plate 24 will not tilt when moving.

[0052] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A multi-head probe for an ultrasonic flaw detector, characterized in that: It includes two fixed plates (1) and an auxiliary plate (3), and one side of the fixed plate (1) is provided with a detection mechanism for flaw detection; One end of the fixing plate (1) is provided with an adjustment mechanism for keeping the probe in contact with the plate at all times; One side of the auxiliary plate (3) is provided with a moving mechanism for enabling the probe to move autonomously.

2. A multiple probe for an ultrasonic flaw detector according to claim 1, wherein: The detection mechanism includes a rotating column (51) rotatably connected between two fixed plates (1). A probe group (52) is provided on the outer surface of the rotating column (51). The probe group (52) is provided with several different ultrasonic probes. A rotating block (53) is fixedly connected to one side of the rotating column (51). An auxiliary rod (54) is fixedly connected to the surface of the fixed plate (1). A stop rod (55) is rotatably connected to one end of the auxiliary rod (54). A sliding groove (56) is provided inside the rotating column (51).

3. The multi-probe for an ultrasonic flaw detector according to claim 1, wherein: The adjustment mechanism includes a connecting plate (21) fixedly connected to one end of the fixed plate (1), and two telescopic rods (22) are fixedly connected to the end of the connecting plate (21) away from the fixed plate (1).

4. A multiple probe for an ultrasonic flaw detector according to claim 3, wherein: A connecting plate 24 is fixedly connected between the ends of the two telescopic rods 1 (22) away from the connecting plate 1 (21), and two return springs (23) are fixedly connected between the connecting plate 1 (21) and the connecting plate 2 (24).

5. A multiple probe for an ultrasonic flaw detector according to claim 4, wherein: The connecting plate 2 (24) is internally threaded with a threaded rod 1 (26), and a handle 1 (27) is fixedly connected to the side of the threaded rod 1 (26) away from the connecting plate 2 (24).

6. A multiple probe for an ultrasonic flaw detector according to claim 5, wherein: Two telescopic rods (25) are fixedly connected between the connecting plate 2 (24) and the auxiliary plate (3).

7. The multiple transducer head for an ultrasonic flaw detector according to claim 1, wherein: The moving mechanism includes an auxiliary block (41) fixedly connected to the bottom surface of the auxiliary plate (3). A bidirectional screw (42) is rotatably connected inside the auxiliary block (41). Moving plates (47) are threadedly connected to the outer surfaces of both ends of the bidirectional screw (42). Limiting plates (45) are fixedly connected to both ends of the bidirectional screw (42).

8. A multiple probe for an ultrasonic flaw detector according to claim 7, wherein: One end of the bidirectional screw (42) is fixedly connected to a handle (46), and the end of the movable plate (47) away from the bidirectional screw (42) is rotatably connected to a roller (48).

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