A measuring probe for eddy current testing of a workpiece surface

Abstract

This utility model discloses a measuring rod for eddy current detection of a workpiece surface, including a probe rod, one end of which is rotatably connected to an adjusting rod via a rotating shaft, and the other end of which is connected to a base; a first adjusting component, which is disposed on the base and is used to control the rotation angle of the adjusting rod; a telescopic sleeve, which is telescopically disposed on the adjusting rod along the axial direction, and the end of the telescopic sleeve away from the probe rod is provided with an eddy current detection probe for detecting the workpiece surface; and a second adjusting component, which is disposed on the base and controls the telescopic position of the telescopic sleeve on the adjusting rod, thereby controlling the axial position of the eddy current detection probe on the adjusting rod. Both the angle of the eddy current detection probe and its axial position on the adjusting rod can be adjusted, allowing the eddy current detection probe to fit closely to the workpiece surface and adapt to different measurement distances, thus improving the accuracy of the detection.

Description

Technical Field

[0001] This utility model relates to the field of in-situ eddy current testing technology, and in particular to a measuring rod for eddy current testing of workpiece surface. Background Technology

[0002] In-situ eddy current testing can quickly and effectively detect safety hazards in workpieces without affecting or altering their overall performance, which is of great significance. In practice, it has been found that due to limited space in some scenarios and variations in the curvature of the workpiece's outer surface, existing testing probes often encounter problems such as the probe failing to fit snugly against the workpiece surface (which severely affects testing accuracy) or having a small testing area. Utility Model Content

[0003] The purpose of this invention is to provide a measuring rod for eddy current detection on the surface of a workpiece, so as to solve the existing technical defects and unmet technical requirements.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A measuring rod for eddy current detection of workpiece surface, comprising:

[0006] A probe rod, one end of which is rotatably connected to an adjusting rod via a rotating shaft, and the other end of which is connected to a base;

[0007] A first adjustment component is disposed on a base and is used to control the rotation angle of the adjustment rod.

[0008] A telescopic sleeve is provided on the adjusting rod along the axial direction of the adjusting rod, and an eddy current detection probe for detecting the surface of the workpiece is provided at the end of the telescopic sleeve away from the probe rod.

[0009] The second adjustment component is mounted on the base and controls the telescopic position of the telescopic sleeve on the adjustment rod, thereby controlling the axial position of the eddy current detection probe on the adjustment rod.

[0010] Preferably, the telescopic sleeve is fitted onto the adjusting rod, and the adjusting rod has a groove along its axial direction. The telescopic sleeve is fixedly connected to a slider, which is placed in the groove. The second adjusting component can drive the slider to slide in the groove.

[0011] Preferably, the slider is fixedly connected to a third pull rope, and the slide groove is provided with multiple sets of guide structures. The two ends of the third pull rope pass through the hollow probe after bypassing the multiple sets of guide structures, and the two ends of the third pull rope are connected to the second adjustment component. The second adjustment component controls the movement of the two ends of the third pull rope, thereby controlling the position of the slider in the slide groove.

[0012] Preferably, the third pull rope includes a first parallel section, which is parallel to the axis of the adjusting rod under the guidance of multiple sets of guiding structures, and the slider is fixedly connected to the first parallel section.

[0013] Preferably, the second adjustment component includes a winding wheel rotatably mounted on the base, with both ends of the third pull rope wound around the winding wheel in the same helical direction. When the winding wheel rotates in the positive direction, one end of the third pull rope is wound around the winding wheel, and the other end of the third pull rope is released from the winding wheel. The rotation of the winding wheel is controlled by automatic control or manual rotation.

[0014] Preferably, the device also includes a first pull rope and a second pull rope. The ends of the first pull rope and the second pull rope pass through the hollow probe and are respectively connected to the two ends of the adjusting rod. The ends of the first pull rope and the second pull rope are respectively connected to the first adjusting component. The first adjusting component controls the first pull rope and the second pull rope to pull or release, thereby controlling the adjusting rod to rotate around the rotating axis.

[0015] Preferably, the first adjustment component includes two sets of linear motion mechanisms, the moving ends of the two linear motion mechanisms are respectively connected to the ends of the first pull rope and the second pull rope, and the two linear motion mechanisms are controlled to move their moving ends automatically or manually.

[0016] Preferably, the end of the eddy current detection probe is connected to an eddy current sensor via a ball joint, and the eddy current sensor can rotate around the center of the ball joint within a set angle range to achieve adaptive floating.

[0017] Preferably, the eddy current detection probe has a limiting protrusion on one side, the height of which exceeds that of the eddy current sensor. The eddy current detection probe is movably mounted on the telescopic sleeve along the axial direction of the telescopic sleeve, and an elastic element is provided between the telescopic sleeve and the eddy current detection probe. The elastic element provides the eddy current detection probe with an elastic force that pushes it outward or pulls it inward, so that the limiting protrusion abuts against the edge of the workpiece, and the detection surface of the eddy current sensor is in contact with the surface of the workpiece.

[0018] Preferably, the limiting protrusion has a camera for observation inside, and the limiting protrusion has an observation channel extending through the camera along its axial direction.

[0019] The beneficial effects of this utility model are as follows:

[0020] The first adjustment component controls the adjustment rod to rotate at a certain angle, adjusting the angle of the eddy current detection probe so that the angle between the eddy current detection probe and the edge of the workpiece to be tested is nearly perpendicular, creating conditions for the subsequent contact of the eddy current sensor's detection surface. The second adjustment component controls the telescopic sleeve to move along the axial direction of the adjustment rod, adjusting the position of the eddy current detection probe in the axial direction of the adjustment rod, thereby adapting to the needs of different measurement distances. Through the combination of ball joint structure and elastic element, the angle of the eddy current sensor can be adaptively adjusted and can accurately fit the surface of the workpiece, while protecting the eddy current sensor from excessive pressure, thus improving the accuracy of detection.

[0021] When the overall structure of the measuring rod is fully retracted, the eddy current testing probe, telescopic sleeve, adjusting rod, and probe rod will become a slender rod-shaped structure that can be inserted into the inner cavity of the equipment through the narrow testing hole. The eddy current testing probe performs eddy current testing on the surface of the workpiece in the inner cavity without disassembling the overall structure of the equipment, thus achieving rapid in-situ testing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0023] Figure 2 This is a schematic diagram of the base structure of Example 1;

[0024] Figure 3 This is an exploded view of the telescopic sleeve structure of Example 1;

[0025] Figure 4 This is a side sectional view of the adjusting rod in Example 1;

[0026] Figure 5 This is a schematic diagram of the eddy current detection probe structure in Example 1;

[0027] Figure 6 This is a schematic diagram of the eddy current detection probe structure in Example 2;

[0028] Figure 7 This is a schematic diagram of the manual control replacement scheme in Example 1;

[0029] Figure 8 This is a schematic diagram of the first installation structure of the eddy current detection probe in Example 3;

[0030] Figure 9 This is a schematic diagram of the second mounting structure of the eddy current detection probe in Example 3;

[0031] Figure 10 This is a diagram showing the detection status during the actual detection process of the eddy current detection probe.

[0032] Figure 11 This is a state diagram of a workpiece being inspected by the first type of eddy current testing probe.

[0033] Figure 12 This is a state diagram of the workpiece being tested by the second type of eddy current testing probe. Detailed Implementation

[0034] 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. Example 1

[0035] like Figure 10 In the actual testing environment, the operator needs to pass the probe rod 1 through the narrow testing hole 002 into the internal sealed space of the equipment. Then, the eddy current testing probe on the probe rod 1 performs eddy current testing on the surface of the workpiece 001 inside the equipment. It is not necessary to disassemble the overall structure of the equipment, thus achieving rapid in-situ testing.

[0036] like Figures 1 to 5 A measuring rod for eddy current detection of workpiece surface includes a probe 1, a first adjusting component 6, a telescopic sleeve 3, and a second adjusting component 7. One end of the probe 1 is rotatably connected to an adjusting rod 2 via a rotating shaft 101 located at the end of the probe 1, and the other end of the probe 1 is connected to a base 5. The first adjusting component 6 is located on the base 5 and is used to control the rotation angle of the adjusting rod 2.

[0037] It also includes a first pull rope 9 and a second pull rope 10. The head ends of the first pull rope 9 and the second pull rope 10 pass through the hollow probe 1 and are respectively connected to the two ends of the adjusting rod 2. The ends of the first pull rope 9 and the second pull rope 10 are respectively connected to the first adjusting component 6. The first adjusting component 6 controls the first pull rope 9 and the second pull rope 10 to pull or release, thereby controlling the adjusting rod 2 to rotate around the rotating axis 101.

[0038] The first adjustment component 6 includes two sets of linear motion mechanisms. The moving ends of the two linear motion mechanisms are respectively connected to the ends of the first pull rope 9 and the second pull rope 10. The two linear motion mechanisms are controlled to move their moving ends automatically or manually.

[0039] Specifically, the two linear motion mechanisms are controlled automatically to move their moving ends. The linear motion mechanism is a threaded rod 601 threadedly mounted on the mounting block 605. One end of the two threaded rods 601 is circumferentially connected to the first pull rope 9 and the second pull rope 10, respectively. This circumferential rotatable connection adopts a bearing ring structure to prevent the threaded rod 601 from causing the first pull rope 9 and the second pull rope 10 to coil when rotating. The other end of the threaded rod 601 is fixedly connected to the output shaft of the first drive motor 602. The base 5 is provided with two guide rails 603. The two first drive motors 602 are slidably mounted on the corresponding guide rails 603. The first drive motors 602 drive the threaded rod 601 to rotate forward and backward, causing the threaded rod 601 to move back and forth on the mounting block 605, thereby pulling or releasing the first pull rope 9 or the second pull rope 10 to control the rotation angle of the adjusting rod 2. When the threaded rod 601 moves, the threaded rod 601 will drive the first drive motor 602 to move on the guide rail 603. Alternatively, the two linear motion mechanisms can be replaced by linear motion modules, electric actuators, hydraulic actuators, or pneumatic actuators.

[0040] As an alternative, the two linear motion mechanisms are manually controlled to move their motion ends, specifically as follows: Figure 7 As shown, a knob 604 is fixedly connected to the end of the threaded rod 601. The operator controls the forward and reverse rotation of the threaded rod 601 by rotating the knob 604, thereby pulling or releasing the first pull rope 9 or the second pull rope 10.

[0041] The telescopic sleeve 3 is telescopically mounted on the adjusting rod 2 along the axial direction. The end of the telescopic sleeve 3 away from the probe rod 1 is provided with an eddy current detection probe 4 for detecting the surface of the workpiece. The second adjusting component 7 is mounted on the base 5. The second adjusting component 7 controls the telescopic position of the telescopic sleeve 3 on the adjusting rod 2, thereby controlling the position of the eddy current detection probe 4 in the axial direction of the adjusting rod 2.

[0042] The telescopic sleeve 3 is fitted onto the adjusting rod 2. The adjusting rod 2 has a sliding groove 201 along its axial direction. The telescopic sleeve 3 is fixedly connected to a slider 202, which is placed in the sliding groove 201. The second adjusting component 7 can drive the slider 202 to slide in the sliding groove 201.

[0043] The slider 202 is fixedly connected to a third pull rope 8. Multiple sets of guide structures are provided within the slide groove 201. These guide structures include guide posts and guide wheels, or a combination thereof. The two ends of the third pull rope 8 pass through the hollow probe rod 1 after bypassing the multiple sets of guide structures. Both ends of the third pull rope 8 are connected to the second adjusting component 7. The second adjusting component 7 controls the movement of the two ends of the third pull rope 8, thereby controlling the position of the slider 202 within the slide groove 201. The third pull rope 8 includes a first parallel section 801. Guided by the multiple sets of guide structures, the first parallel section 801 remains parallel to the axis of the adjusting rod 2. The slider 202 is fixedly connected to the first parallel section 801.

[0044] The second adjustment assembly 7 includes a winding wheel 701 rotatably mounted on the base 5. Both ends of a third pull rope 8 are wound around the winding wheel 701 in the same helical direction. When the winding wheel 701 rotates in the forward direction, one end of the third pull rope 8 is wound around the winding wheel 701, and the other end is released from the winding wheel 701. When the winding wheel 701 rotates in the reverse direction, one end of the third pull rope 8 is released from the winding wheel 701, and the other end is wound around the winding wheel 701. The rotation of the winding wheel 701 is controlled automatically or manually.

[0045] Specifically, the winding wheel 701 is controlled to rotate automatically, including a second drive motor 702. The second drive motor 702 is fixedly mounted on the base 5. The winding wheel 701 is coaxially and fixedly connected to the output shaft of the second drive motor 702, and the winding wheel 701 is driven to rotate by the second drive motor 702.

[0046] As an alternative, the winding reel 701 uses manual rotation to control its rotation, specifically as follows: Figure 7 As shown, the winding wheel 701 is equipped with a rotating handle 703, and the operator drives the winding wheel 701 to rotate forward and backward by rotating the handle 703.

[0047] The end of the eddy current detection probe 4 is connected to an eddy current sensor 401 via a ball joint. The eddy current sensor 401 can rotate around the center of the ball joint within a set angle range to achieve adaptive floating.

[0048] A limiting protrusion 402 is provided on one side of the eddy current detection probe 4. The height of the limiting protrusion 402 exceeds that of the eddy current sensor 401, so that the limiting protrusion 402 abuts against the edge of the workpiece, and the detection surface of the eddy current sensor 401 is in contact with the surface of the workpiece to detect the surface of the workpiece.

[0049] The limiting protrusion 402 is equipped with a camera 403 for observation, and the limiting protrusion 402 has an observation channel that runs through the camera 403 along its axial direction. Example 2

[0050] This embodiment refers to the working principle of embodiment 1, with the following differences:

[0051] like Figure 6 and Figure 12 As shown, the side of the eddy current detection probe 4 is provided with a groove 404. The eddy current sensor 401 is connected to the top of the groove 404 through a ball joint structure. The camera 403 is set at the bottom of the groove 404. The eddy current detection probe 4 can hook onto the surface of the workpiece 001 through the groove 404, and the detection surface of the eddy current sensor 401 is in contact with the surface of the workpiece to detect the surface of the workpiece. Example 3

[0052] This embodiment refers to the working principle of Embodiments 1 and 2, with the following differences:

[0053] The eddy current detection probe 4 is movably mounted on the telescopic sleeve 3 along the axial direction, and an elastic element is provided between the eddy current detection probe 4 and the telescopic sleeve 3. The elastic element provides the eddy current detection probe 4 with an elastic force that pops it outward or pulls it inward.

[0054] Specifically: the eddy current detection probe 4 is mounted on the telescopic sleeve 3 along the axial direction of the telescopic sleeve 3 via a pin structure. The pin structure prevents the eddy current detection probe 4 from rotating relative to the axis of the telescopic sleeve 3. The elastic element is a spring 301. One end of the spring 301 is abutted against or fixedly connected to the eddy current detection probe 4, and the other end of the spring 301 is abutted against or fixedly connected to the telescopic sleeve 3.

[0055] like Figure 8 As shown, when the elastic element applies an outward elastic force to the eddy current detection probe 4, one end of the spring 301 abuts against the eddy current detection probe 4, and the other end abuts against the telescopic sleeve 3. When the eddy current detection probe 4 contacts the workpiece 001 to be tested, the spring 301 is compressed, protecting the eddy current sensor from excessive pressure. Simultaneously, when the probe rod 1 drives the eddy current detection probe 4 to slide along the edge of the workpiece 001, the spring 301, through its own elastic force, always exerts a certain pushing force on the eddy current detection probe 4, ensuring that the detection surface of the eddy current sensor is always pressed against the surface of the workpiece 001. This achieves the elastic adaptive extension and retraction of the eddy current detection probe 4, greatly improving the accuracy of the detection. Figure 11 The diagram shows the state of the eddy current detection probe 4 when it is detecting workpiece 001.

[0056] like Figure 9 As shown, when the elastic element applies an inward pulling elastic force to the eddy current detection probe 4, one end of the spring 301 is fixedly connected to the eddy current detection probe 4, and the other end is fixedly connected to the telescopic sleeve 3. When the eddy current detection probe 4 hooks onto the surface of the workpiece 001 through the groove, the spring 301 is stretched, protecting the eddy current sensor from excessive pressure. Simultaneously, when the probe rod 1 drives the eddy current detection probe 4 to slide along the edge of the workpiece 001, the spring 301, through its own elastic force, always exerts a certain pulling force on the eddy current detection probe 4, ensuring that the detection surface of the eddy current sensor is always pressed against the surface of the workpiece 001. This achieves the elastic adaptive extension and retraction of the eddy current detection probe 4, greatly improving the accuracy of the detection. Figure 12 The diagram shows the state of the eddy current detection probe 4 when it is detecting workpiece 001.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A measuring rod for eddy current detection of a workpiece surface, characterized in that, include A probe rod, one end of which is rotatably connected to an adjusting rod via a rotating shaft, and the other end of which is connected to a base; A first adjustment component is disposed on a base and is used to control the rotation angle of the adjustment rod. A telescopic sleeve is provided on the adjusting rod along the axial direction of the adjusting rod, and an eddy current detection probe for detecting the surface of the workpiece is provided at the end of the telescopic sleeve away from the probe rod. The second adjustment component is mounted on the base and controls the telescopic position of the telescopic sleeve on the adjustment rod, thereby controlling the axial position of the eddy current detection probe on the adjustment rod.

2. The measuring rod for eddy current detection of a workpiece surface according to claim 1, characterized in that, The telescopic sleeve is fitted onto the adjusting rod, and the adjusting rod has a sliding groove along its axial direction. The telescopic sleeve is fixedly connected to a slider, which is placed in the sliding groove. The second adjusting component can drive the slider to slide in the sliding groove.

3. The measuring rod for eddy current detection of a workpiece surface according to claim 2, characterized in that, The slider is fixedly connected to a third pull rope. The groove is provided with multiple sets of guide structures. The two ends of the third pull rope pass through the hollow probe after bypassing the multiple sets of guide structures. The two ends of the third pull rope are connected to the second adjustment component. The second adjustment component controls the movement of the two ends of the third pull rope, thereby controlling the position of the slider in the groove.

4. The measuring rod for eddy current detection of a workpiece surface according to claim 3, characterized in that, The third pull rope includes a first parallel section, which is parallel to the axis of the adjusting rod under the guidance of multiple sets of guiding structures, and the slider is fixedly connected to the first parallel section.

5. The measuring rod for eddy current detection of a workpiece surface according to claim 3, characterized in that, The second adjustment component includes a winding wheel rotatably mounted on the base. The two ends of the third pull rope are wound on the winding wheel in the same helical direction. When the winding wheel rotates in the positive direction, one end of the third pull rope is wound on the winding wheel, and the other end of the third pull rope is released from the winding wheel. The rotation of the winding wheel is controlled by automatic control or manual rotation.

6. The measuring rod for eddy current detection of a workpiece surface according to claim 1, characterized in that, It also includes a first pull rope and a second pull rope. The head ends of the first pull rope and the second pull rope pass through the hollow probe and are respectively connected to the two ends of the adjusting rod. The ends of the first pull rope and the second pull rope are respectively connected to the first adjusting component. The first adjusting component controls the first pull rope and the second pull rope to pull or release, thereby controlling the adjusting rod to rotate around the rotating axis.

7. The measuring rod for eddy current detection of a workpiece surface according to claim 6, characterized in that, The first adjustment component includes two sets of linear motion mechanisms. The moving ends of the two linear motion mechanisms are respectively connected to the ends of the first pull rope and the second pull rope. The two linear motion mechanisms are controlled to move their moving ends automatically or manually.

8. The measuring rod for eddy current detection of a workpiece surface according to claim 1, characterized in that, The end of the eddy current detection probe is connected to an eddy current sensor via a ball joint. The eddy current sensor can rotate around the center of the ball joint within a set angle range to achieve adaptive floating.

9. A measuring rod for eddy current detection of a workpiece surface according to claim 8, characterized in that, The eddy current detection probe has a limiting protrusion on one side, the height of which exceeds that of the eddy current sensor. The eddy current detection probe is movably mounted on the telescopic sleeve along the axial direction of the telescopic sleeve, and an elastic element is provided between the telescopic sleeve and the eddy current detection probe. The elastic element provides the eddy current detection probe with an elastic force that pushes it outward or pulls it inward, so that the limiting protrusion abuts against the edge of the workpiece, and the detection surface of the eddy current sensor is in contact with the surface of the workpiece.

10. A measuring rod for eddy current detection of a workpiece surface according to claim 9, characterized in that, The limiting protrusion has a camera inside for observation, and an observation channel is provided through the limiting protrusion along the axial direction of the camera.

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