Pull rope-driven workpiece surface eddy current detection rod

Abstract

The invention discloses a pull rope-driven workpiece surface eddy current detection rod, which is characterized in that one end of a probe rod is rotationally connected with an adjusting rod through a rotating shaft, and the other end of the probe rod is connected with a base; the head end of the first pull rope and the head end of the second pull rope are connected with the two ends of the adjusting rod correspondingly, and the rotating angle of the adjusting rod rotating around the rotating shaft is controlled by controlling pulling or releasing of the first pull rope and the second pull rope. The adjusting rod is sleeved with the telescopic sleeve, the telescopic sleeve can slide in the axial direction of the adjusting rod, an eddy current detection probe is arranged at the end, away from the probe rod, of the telescopic sleeve, a connecting part is arranged on the telescopic sleeve, the third pull rope forms a first parallel section under guiding of the second guiding structure, and the first parallel section of the third pull rope pulls the connecting part of the telescopic sleeve from the front side. The second parallel section of the fourth pull rope pulls the connecting part of the telescopic sleeve from the rear side, and the axial position of the telescopic sleeve on the adjusting rod is controlled by controlling pulling and releasing of the third pull rope and the fourth pull rope. And a pull rope driving mode is adopted, so that adjustment is more flexible.

Description

Technical Field

[0001] The invention relates to the technical field of in-situ eddy current detection, in particular to a pull-rope driven eddy current detection rod for a workpiece surface. Background Art

[0002] In-situ eddy current testing (ISC) is a significant advancement in the rapid and effective detection of safety hazards in workpieces, without affecting or altering their overall performance. In practice, it has been found that due to the confined space and varying curvature of the outer surface in some locations, existing testing rods are prone to problems with the probe failing to adhere to the workpiece surface or exhibiting a limited detection area. Furthermore, the angle and position of the existing probes are not easily adjustable, necessitating a new drive method to facilitate adjustment of the probe's angle and position. Summary of the Invention

[0003] The object of the present invention is to provide a rope-driven eddy current detection rod for a workpiece surface, so as to solve the existing technical defects and unmet technical requirements.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A rope-driven eddy current detection rod for a workpiece surface, comprising

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

[0007] A rope drive structure, comprising a first pull rope, a second pull rope, a third pull rope, and a fourth pull rope, wherein the first pull rope, the second pull rope, the third pull rope, and the fourth pull rope respectively pass through a hollow probe rod, and the head ends of the first pull rope and the second pull rope are respectively connected to the ends of the adjustment rod, and the rotation angle of the adjustment rod around the rotation axis is controlled by controlling the first pull rope and the second pull rope to be pulled or released;

[0008] The telescopic sleeve is outer-circuited on the adjusting rod, and the telescopic sleeve can slide along the axial direction of the adjusting rod. An eddy current detection probe is provided at the end of the telescopic sleeve away from the probe rod. The adjusting rod is provided with a second guide structure, and the second guide structure is a guide column and / or a guide wheel. A connecting portion is provided on the telescopic sleeve. The third pull rope forms a first parallel section under the guidance of the second guide structure, and the first parallel section remains parallel to the axial direction of the adjusting rod. The first parallel section of the third pull rope pulls the connecting portion of the telescopic sleeve from the front side. The fourth pull rope forms a second parallel section under the guidance of the second guide structure, and the second parallel section remains parallel to the axial direction of the adjusting rod. The second parallel section of the fourth pull rope pulls the connecting portion of the telescopic sleeve from the rear side. By controlling the pulling and releasing of the third pull rope and the fourth pull rope, the axial position of the telescopic sleeve on the adjusting rod is controlled.

[0009] Or the third pull rope and the fourth pull rope are connected together to form a pull rope, and the third pull rope is the fourth pull rope. The third pull rope forms a third parallel section under the guidance of the second guide structure, and the third parallel section is connected to the connecting part of the telescopic sleeve. By controlling the pulling and releasing of the two ends of the third pull rope, the axial position of the telescopic sleeve on the adjusting rod is controlled.

[0010] Preferably, a first guide structure is provided in the probe rod, and the first guide structure is a guide column and / or guide wheel. The first pull rope and the second pull rope pass around the first guide structure and pass through the hollow probe rod, and the first pull rope and the second pull rope remain parallel to the axial direction of the probe rod under the guidance of the first guide structure.

[0011] Preferably, the first guide structure includes a first guide post and a second guide post, the first guide post and the second guide post are arranged on the outside of the probe rod located on the third pull rope or the fourth pull rope, the first guide post and the second guide post are spaced apart from each other from front to back, the axes of the first guide post and the second guide post are respectively parallel to the axis of the rotating shaft, the first pull rope passes between the first guide post and the second guide post and extends from the second guide post to the side of the probe rod close to the base, the second pull rope passes from one side of the first guide post and passes from the other side of the second guide post to the side of the probe rod close to the base, the parts of the first pull rope and the second pull rope that pass through the first guide post and the second guide post are staggered in the axial direction of the first guide post and the second guide post, and are respectively located on both sides of the third pull rope;

[0012] Alternatively, the first guide column and the second guide column are combined into one, namely the first guide column, the first pull rope passes around one side of the first guide column and extends to the side of the probe rod close to the base, and the second pull rope passes around the other side of the first guide column and extends to the side of the probe rod close to the base.

[0013] Preferably, the adjusting rod is provided with an opening, the end of the probe rod is inserted into the opening and connected to the adjusting rod through a rotating shaft, the front end of the adjusting rod is provided with a first connecting block, the rear end of the adjusting rod is provided with a second connecting block, the head end of the first pull rope is fixedly connected to the first connecting block, and the head end of the second pull rope is fixedly connected to the second connecting block. A notch is provided on one side of the probe rod, and the notch is adapted to the shape of the second connecting block. When the adjusting rod is rotated until the second connecting block is placed in the notch, the adjusting rod is in an upright position.

[0014] Preferably, the second guide structure includes a third guide post and a fourth guide post, the third guide post being arranged at the front end of the adjusting rod, the fourth guide post being arranged on the adjusting rod and being located beside the rotating shaft, the axes of the third guide post and the fourth guide post being parallel to the axis of the rotating shaft, the third pull rope being passed around the third guide post and the fourth guide post in sequence and extending toward the side of the probe rod close to the base, and the fourth pull rope being passed around the rotating shaft and extending toward the side of the probe rod close to the base;

[0015] Alternatively, the second guide structure also includes a fifth guide column, which is arranged on the adjusting rod and located next to the rotating shaft. The axis of the fifth guide column is parallel to the axis of the rotating shaft, and the fourth pull rope passes around the fifth guide column and extends to the side of the probe rod close to the base.

[0016] Preferably, the base is provided with a first adjustment component for controlling the pulling or releasing of the first pull rope and the second pull rope, 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 control the movement of their moving ends automatically or manually.

[0017] Preferably, a second adjustment component is provided on the base, and the second adjustment component can release a fourth pull rope of the same length while pulling the third pull rope, or the second adjustment component can release the third pull rope of the same length while pulling the fourth pull rope, thereby controlling 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.

[0018] Preferably, when the third pull rope and the fourth pull rope are connected together to form a pull rope, a slide groove is provided in the adjusting rod along its axial direction, and the connecting part of the telescopic sleeve is a slider fixedly connected to the telescopic sleeve. The slider is placed in the slide groove, and the slider is fixedly connected to a point on the third parallel section of the third pull rope. The second adjustment component can drive the slider to slide in the slide groove through the third parallel section of the third pull rope.

[0019] Preferably, the second adjustment component includes a winding wheel rotatably arranged on the base, and both ends of the third pull rope are respectively wound on the winding wheel in the same spiral 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.

[0020] Preferably, 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. The eddy current detection probe is provided with a camera for observation, which is located on the side of the eddy current sensor.

[0021] The beneficial effects of the present invention are:

[0022] 1. The first and second pull ropes are used to control the rotation angle of the adjustment rod around the rotation axis, so that the angle between the eddy current detection probe and the edge of the workpiece to be detected is close to vertical, creating conditions for the subsequent detection surface fitting. The third and fourth pull ropes are used to control the axial position of the telescopic sleeve on the adjustment rod, and the axial position of the eddy current detection probe on the adjustment rod is adjusted to meet the needs of different measurement distances. The ball joint structure allows the angle of the eddy current detection probe to be adaptively adjusted, so that the eddy current detection probe can accurately fit the surface of the workpiece. The pull rope drive method is used, and the adjustment is more flexible.

[0023] 2. When the overall structure is completely folded, the eddy current detection probe, telescopic sleeve, adjustment rod and probe rod will become a slender rod-shaped structure, which can be inserted into the inner cavity of the equipment through the narrow detection hole. The eddy current detection probe performs eddy current detection on the surface of the workpiece in the inner cavity without disassembling the overall structure of the equipment, realizing rapid in-situ detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the detection status diagram of the eddy current detection probe during the actual detection process;

[0025] Figure 2 This is a schematic diagram of the overall structure of Example 1;

[0026] Figure 3 This is a schematic diagram of the base structure of Example 1;

[0027] Figure 4 This is an exploded view of the telescopic sleeve structure of Example 1;

[0028] Figure 5 A side sectional view of the adjustment rod of Example 1;

[0029] Figure 6 This is a schematic diagram of the first guide structure of Example 1;

[0030] Figure 7 This is a schematic structural diagram of the first solution of the eddy current detection probe of Example 1;

[0031] Figure 8 This is a schematic structural diagram of the second solution of the eddy current detection probe of Example 1;

[0032] Figure 9 This is a schematic diagram of the structure of the manual control replacement solution of Example 1;

[0033] Figure 10 This is a schematic diagram of the structure in which the third and fourth pull ropes of Example 2 are the same pull rope;

[0034] Figure 11 This is a state diagram of the first eddy current testing probe detecting a workpiece;

[0035] Figure 12 This is a state diagram of the second eddy current testing probe inspecting the workpiece. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example 1

[0038] like Figure 1 In the actual testing environment, the operator needs to pass the probe rod 1 through the narrow testing tube 002 into the internal sealed space of the equipment, and 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. There is no need to disassemble the overall structure of the equipment, and rapid in-situ testing can be achieved;

[0039] like Figures 2 to 7 A rope-driven eddy current detection rod for a workpiece surface includes a probe rod 1, a first adjustment component 6, a telescopic sleeve 3, and a second adjustment component 7. One end of the probe rod 1 is rotatably connected to the adjustment rod 2 through a rotating shaft 101, and the other end of the probe rod 1 is connected to a base 5; the first adjustment component 6 is arranged on the base 5, and the first adjustment component 6 is used to adjust the rotation angle of the adjustment rod 2.

[0040] The rope drive structure includes a first pull rope 9, a second pull rope 10, a third pull rope 8 and a fourth pull rope 11. One end of the first pull rope 9 and the second pull rope 10 passes through the hollow probe rod 1 and is respectively connected to the two ends of the adjusting rod 2. The other ends of the first pull rope 9 and the second pull rope 10 are 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 be pulled or released, thereby controlling the adjusting rod 2 to rotate around the rotation axis 101.

[0041] A first guide structure is provided in the probe rod 1, and the first guide structure is a guide column and / or a guide wheel. The first pull rope 9 and the second pull rope 10 pass through the hollow probe rod 1 after passing around the first guide structure, and the first pull rope 9 and the second pull rope 10 remain parallel to the axial direction of the probe rod 1 under the guidance of the first guide structure.

[0042] like Figure 5 and Figure 6The first guide structure includes a first guide post 102 and a second guide post 103. The first guide post 102 and the second guide post 103 are arranged outside the third or fourth pull rope 8 on the probe rod 1. The first guide post 102 and the second guide post 103 are spaced apart from each other from front to back. The axes of the first and second guide posts 102 and 103 are parallel to the axis of the rotation axis 101. The first pull rope 9 passes between the first and second guide posts 102 and 103 and bypasses the second guide post 103 to extend toward the side of the probe rod 1 near the base 5. The second pull rope 10 bypasses one side of the first guide post 102 and the other side of the second guide post 103 to extend toward the side of the probe rod 1 near the base 5. The portions of the first and second pull ropes 9 and 10 bypassing the first and second guide posts 102 and 103 are staggered in the axial direction of the first and second guide posts 102 and 103 and are located on either side of the third pull rope 8. The first and second guide posts 102 and 103 can also be configured as guide wheels. Of course, the first guide structure may also adopt a structure in which a guide column and a guide wheel are used in combination.

[0043] Alternatively, the first guide post 102 and the second guide post 103 are combined into one, namely the first guide post 102. The first pull rope 9 passes around one side of the first guide post 102 and extends toward the side of the probe 1 near the base 5. The second pull rope 10 passes around the other side of the first guide post 102 and extends toward the side of the probe 1 near the base 5. In this case, the portions of the first and second pull ropes 9 and 10 that pass around the first guide post 102 are staggered along the axis of the first guide post 102 and are located on either side of the third pull rope 8.

[0044] The tail end of the adjusting rod 2 is provided with an opening, the end of the probe rod 1 is inserted into the opening and is rotatably connected to the adjusting rod 2 through the rotating shaft 101, the front end of the adjusting rod 2 is provided with a first connecting block 203, and the rear end of the adjusting rod 2 is provided with a second connecting block 204, the head end of the first pull rope 9 is fixedly connected to the first connecting block 203, and the head end of the second pull rope 10 is fixedly connected to the second connecting block 204, and a notch 104 is provided on one side of the probe rod 1, and the notch 104 is adapted to the shape of the second connecting block 204. When the adjusting rod 2 is rotated until the second connecting block 204 is placed at the notch 104, the adjusting rod 2 is in an upright position.

[0045] The base 5 is provided with a first adjustment component 6 for controlling the pulling or release of the first pull rope 9 and the second pull rope 10. 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 control the movement of their moving ends automatically or manually.

[0046] Specifically, the two linear motion mechanisms use an automatic method to control the movement of 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 respectively connected to the first pull rope 9 and the second pull rope 10 for circumferential rotation to prevent the threaded rod 601 from causing the first pull rope 9 and the second pull rope 10 to curl when rotating. The other end of the threaded rod 601 is fixedly connected to the output shaft of the first drive motor 602. Two guide rails 603 are provided on the base 5. The two first drive motors 602 are respectively slidably arranged on the corresponding guide rails 603. The first drive motor 602 drives the threaded rod 601 to rotate forward and reverse, driving 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, which is used to adjust 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 may be replaced by linear motion modules, electric push rods, hydraulic push rods, or pneumatic push rods.

[0047] As an alternative, the two linear motion mechanisms are manually controlled to move their motion ends, as shown in the following example: Figure 9 As shown, the end of the threaded rod 601 is fixedly connected to the knob 604 , and 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 .

[0048] The telescopic sleeve 3 is externally mounted on the adjusting rod 2, and the telescopic sleeve 3 can slide along the axial direction of the adjusting rod 2. An eddy current detection probe 4 is provided at the end of the telescopic sleeve 3 away from the probe 2. A second guide structure is provided on the adjusting rod 2, and the second guide structure is a guide column and / or a guide wheel. A connecting portion 202 is provided on the telescopic sleeve 3. A sliding groove 201 is provided in the adjusting rod 2 along its axial direction to allow the connecting portion 202 to slide. The third pull rope 8 forms a first parallel section 801 under the guidance of the second guide structure. The first parallel section 801 is aligned with the adjusting rod. 2, the first parallel section 801 of the third pull rope 8 pulls the connecting portion 202 of the telescopic sleeve 3 from the front side, and the fourth pull rope 11 forms a second parallel section 1101 under the guidance of the second guide structure. The second parallel section 1101 is parallel to the axial direction of the adjusting rod 2, and the second parallel section 1101 of the fourth pull rope 11 pulls the connecting portion 202 of the telescopic sleeve 3 from the rear side. By controlling the pulling and releasing of the third pull rope 8 and the fourth pull rope 11, the axial position of the telescopic sleeve 3 on the adjusting rod 2 is controlled.

[0049] The second guide structure includes a third guide post 205 and a fourth guide post 206. The third guide post 205 is arranged at the front end of the adjustment rod 2, and the fourth guide post 206 is arranged on the adjustment rod 2 and is located next to the rotation axis 101. The axes of the third guide post 205 and the fourth guide post 206 are respectively parallel to the axis of the rotation axis 101. The third pull rope 8 passes over the third guide post 205 and the fourth guide post 206 in sequence and extends to the side of the probe rod 1 close to the base 5. The fourth pull rope 11 passes over the rotation axis 101 and extends to the side of the probe rod 1 close to the base 5. The third guide post 205 and the fourth guide post 206 can also be configured as guide wheels. Of course, the second guide structure can also adopt a structure in which guide posts and guide wheels are used in combination.

[0050] Instead of the fourth pull rope 11 being routed around the rotating shaft 101, the second guide structure further includes a fifth guide post, which is disposed on the adjustment rod 2 and is located beside the rotating shaft 101. The axis of the fifth guide post is parallel to the axis of the rotating shaft 101. The fourth pull rope 11 is routed around the fifth guide post and extends toward the side of the probe rod 1 closest to the base 5. The fifth guide post can also be configured as a guide wheel.

[0051] The second adjustment component 7 includes a winding wheel 701 that is rotatably arranged on the base 5. After the third pull rope 8 and the fourth pull rope 11 extend from the side of the probe rod 1 close to the base 5, they are wound on the winding wheel 701 in the same spiral direction. The winding wheel 701 can release the fourth pull rope 11 of the same length while pulling the third pull rope 8, or the winding wheel 701 can release the third pull rope 8 of the same length while pulling the fourth pull rope 11, thereby controlling the telescopic position of the telescopic sleeve 3 on the adjustment rod 2, thereby controlling the axial position of the eddy current detection probe 4 on the adjustment rod 2. The rotation of the winding wheel 701 is controlled by automatic control or manual rotation.

[0052] Specifically, the winding wheel 701 is controlled to rotate in an automatic control manner, and includes a second drive motor 702, which is fixedly arranged on the base 5. The winding wheel 701 is coaxially 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.

[0053] like Figure 9 As an alternative, the winding wheel 701 is controlled by manual rotation. A rotating handle 703 is provided on the winding wheel 701, and the operator drives the winding wheel 701 to rotate forward and backward by rotating the handle 703.

[0054] The end of the eddy current detection probe 4 is connected to the eddy current sensor 401 through 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.

[0055] A limit protrusion 402 is provided on one side of the eddy current detection probe 4. The height of the limit protrusion 402 exceeds that of the eddy current sensor 401, so that the limit protrusion 402 abuts against the edge of the workpiece, and the detection surface of the eddy current sensor 401 is close to the surface of the workpiece to detect the surface of the workpiece. Figure 11 The figure shows the state of the eddy current detection probe 4 when detecting the workpiece 001.

[0056] A camera 403 for observation is provided inside the limiting protrusion 402 , and an observation channel is provided through the limiting protrusion 402 along the axial direction of the camera 403 .

[0057] like Figure 8 As an alternative, a groove 404 is provided on the side of the eddy current detection probe 4, and the eddy current sensor 401 is connected to the top of the groove 404 through a ball joint. The camera 403 is set at the bottom of the groove 404. The eddy current detection probe 4 can be hooked to the surface of the workpiece through the groove 404, and the detection surface of the eddy current sensor 401 is attached to the surface of the workpiece to detect the surface of the workpiece. Figure 12 The figure shows the state of the eddy current detection probe 4 when detecting the workpiece 001.

[0058] Example 2

[0059] This embodiment refers to the working principle of embodiment 1, with the following differences:

[0060] like Figure 10 The third pull rope 8 and the fourth pull rope are connected together to form a pull rope. The third pull rope 8 is the fourth pull rope. The third pull rope 8 forms a third parallel section 802 under the guidance of the second guide structure. The third parallel section 802 is connected to the connecting part 202 of the telescopic sleeve. By controlling the pulling and releasing of the two ends of the third pull rope 2, the axial position of the telescopic sleeve 3 on the adjusting rod 2 is controlled.

[0061] A slide groove 201 is provided in the adjusting rod 2 along its axial direction. The connecting portion 202 of the telescopic sleeve 3 is a slider fixedly connected to the telescopic sleeve 3. The slider is placed in the slide groove 201. The slider is fixedly connected to a point on the third parallel section 802 of the third pull rope 8. The second adjusting component can drive the slider to slide in the slide groove 201 through the third parallel section 802 of the third pull rope 8.

[0062] The second adjustment component includes a winding wheel that is rotatably arranged on the base, and both ends of the third pull rope 8 are respectively wound on the winding wheel in the same spiral direction. When the winding wheel rotates in the positive direction, one end of the third pull rope 8 is wound on the winding wheel, and the other end of the third pull rope 8 is released from the winding wheel. When the winding wheel rotates in the reverse direction, one end of the third pull rope 8 is released from the winding wheel, and the other end of the third pull rope 8 is wound on the winding wheel. The rotation of the winding wheel is controlled by automatic control or manual rotation. Please refer to Example 1 for details.

[0063] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0064] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A rope-driven eddy current detection rod for workpiece surface, characterized in that: include A probe rod, one end of which is rotatably connected to an adjustment rod via a rotating shaft, and the other end of which is connected to a base; A rope drive structure, comprising a first pull rope, a second pull rope, a third pull rope, and a fourth pull rope, wherein the first pull rope, the second pull rope, the third pull rope, and the fourth pull rope respectively pass through a hollow probe rod, and the head ends of the first pull rope and the second pull rope are respectively connected to the ends of the adjustment rod, and the rotation angle of the adjustment rod around the rotation axis is controlled by controlling the first pull rope and the second pull rope to be pulled or released; The telescopic sleeve is outer-circuited on the adjusting rod, and the telescopic sleeve can slide along the axial direction of the adjusting rod. An eddy current detection probe is provided at the end of the telescopic sleeve away from the probe rod. The adjusting rod is provided with a second guide structure, and the second guide structure is a guide column and / or a guide wheel. A connecting portion is provided on the telescopic sleeve. The third pull rope forms a first parallel section under the guidance of the second guide structure, and the first parallel section remains parallel to the axial direction of the adjusting rod. The first parallel section of the third pull rope pulls the connecting portion of the telescopic sleeve from the front side. The fourth pull rope forms a second parallel section under the guidance of the second guide structure, and the second parallel section remains parallel to the axial direction of the adjusting rod. The second parallel section of the fourth pull rope pulls the connecting portion of the telescopic sleeve from the rear side. By controlling the pulling and releasing of the third pull rope and the fourth pull rope, the axial position of the telescopic sleeve on the adjusting rod is controlled. Or the third pull rope and the fourth pull rope are connected together to form a pull rope, and the third pull rope is the fourth pull rope. The third pull rope forms a third parallel section under the guidance of the second guide structure, and the third parallel section is connected to the connecting part of the telescopic sleeve. By controlling the pulling and releasing of the two ends of the third pull rope, the axial position of the telescopic sleeve on the adjusting rod is controlled.

2. The wire-driven eddy current detection rod for workpiece surface according to claim 1, characterized in that: A first guide structure is provided in the probe rod, and the first guide structure is a guide column and / or a guide wheel. The first pull rope and the second pull rope pass around the first guide structure and pass through the hollow probe rod, and the first pull rope and the second pull rope remain parallel to the axial direction of the probe rod under the guidance of the first guide structure.

3. The rope-driven eddy current detection rod for workpiece surface according to claim 2, characterized in that: The first guide structure includes a first guide post and a second guide post, the first guide post and the second guide post are arranged on the outside of the probe rod located on the third pull rope or the fourth pull rope, the first guide post and the second guide post are spaced from front to back, the axes of the first guide post and the second guide post are respectively parallel to the axis of the rotating shaft, the first pull rope passes between the first guide post and the second guide post and extends from the second guide post to the side of the probe rod close to the base, the second pull rope passes from one side of the first guide post and from the other side of the second guide post to the side of the probe rod close to the base, the parts of the first pull rope and the second pull rope that pass through the first guide post and the second guide post are staggered in the axial direction of the first guide post and the second guide post, and are respectively located on both sides of the third pull rope; Alternatively, the first guide column and the second guide column are combined into one, namely the first guide column, the first pull rope passes around one side of the first guide column and extends to the side of the probe rod close to the base, and the second pull rope passes around the other side of the first guide column and extends to the side of the probe rod close to the base.

4. The wire-driven eddy current detection rod for workpiece surface according to claim 1, characterized in that: The adjusting rod is provided with an opening, the end of the probe rod is inserted into the opening and connected to the adjusting rod through a rotating shaft, the front end of the adjusting rod is provided with a first connecting block, the rear end of the adjusting rod is provided with a second connecting block, the head end of the first pull rope is fixedly connected to the first connecting block, and the head end of the second pull rope is fixedly connected to the second connecting block. A notch is provided on one side of the probe rod, and the notch is adapted to the shape of the second connecting block. When the adjusting rod is rotated until the second connecting block is placed in the notch, the adjusting rod is in an upright position.

5. The cable-driven eddy current detection rod for workpiece surface according to claim 1, characterized in that: The second guide structure includes a third guide post and a fourth guide post, the third guide post is arranged at the front end of the adjustment rod, the fourth guide post is arranged on the adjustment rod and is located beside the rotation axis, the axes of the third guide post and the fourth guide post are respectively parallel to the axis of the rotation axis, the third pull rope passes around the third guide post and the fourth guide post in sequence and extends to the side of the probe rod close to the base, and the fourth pull rope passes around the rotation axis and extends to the side of the probe rod close to the base; Alternatively, the second guide structure also includes a fifth guide column, which is arranged on the adjusting rod and located next to the rotating shaft. The axis of the fifth guide column is parallel to the axis of the rotating shaft, and the fourth pull rope passes around the fifth guide column and extends to the side of the probe rod close to the base.

6. The wire-driven eddy current detection rod for workpiece surface according to claim 1, characterized in that: The base is provided with a first adjustment component for controlling the pulling or release of the first pull rope and the second pull rope. 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 control the movement of their moving ends automatically or manually.

7. The wire-driven eddy current detection rod for workpiece surface according to claim 1, characterized in that: A second adjustment component is provided on the base, and the second adjustment component can release a fourth pull rope of the same length while pulling the third pull rope, or the second adjustment component can release the third pull rope of the same length while pulling the fourth pull rope, thereby controlling 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.

8. The wire-driven eddy current detection rod for workpiece surface according to claim 7, characterized in that: When the third pull rope and the fourth pull rope are connected together to form a pull rope, a slide groove is provided in the adjusting rod along its axial direction, and the connecting part of the telescopic sleeve is a slider fixedly connected to the telescopic sleeve. The slider is placed in the slide groove, and the slider is fixedly connected to a point on the third parallel section of the third pull rope. The second adjustment component can drive the slider to slide in the slide groove through the third parallel section of the third pull rope.

9. The wire-driven eddy current detection rod for workpiece surface according to claim 8, characterized in that: The second adjustment component includes a winding wheel rotatably arranged on the base, and both ends of the third pull rope are respectively wound on the winding wheel in the same spiral 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.

10. The wire-driven eddy current detection rod for workpiece surface according to claim 1, characterized in that: The end of the eddy current detection probe is connected to an eddy current sensor through 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. The eddy current detection probe is provided with a camera for observation, and the camera is located on the side of the eddy current sensor.

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