Adjustable rotary eddy current probe detection device and method

Abstract

The invention discloses an adjustable rotary eddy current probe detection device and method, and belongs to the technical field of nondestructive testing, the adjustable rotary eddy current probe detection device comprises a tailstock, the tailstock is rotatably connected with a rotating shaft, and one end of the rotating shaft is rotatably connected with a headstock; a walking motor is arranged on the tailstock; the tailstock and the headstock are each provided with a walking wheel assembly. The rotating shaft is sleeved with a sliding block, and the sliding block is movably arranged on the rotating shaft in a clamped mode and located between the tailstock and the headstock. The rotating shaft is sleeved with a limiting spring. An electric slip ring assembly is arranged on the tailstock; a detection assembly is arranged on the electric slip ring assembly and the slide block; the detection assembly comprises an eddy current probe module; one end of the first connecting rod is rotatably connected with the eddy current probe module, and the other end is rotatably connected with the slider; one end of the second connecting rod is rotatably connected with the eddy current probe module, and the other end is rotatably connected with the electric slip ring assembly. The device can cope with a pipeline with the diameter of 50-100 mm, can comprehensively detect the inner wall of the pipeline, can adapt to protruding obstacles, and prevents the eddy current probe module from being damaged.

Description

Technical Field

[0001] The invention belongs to the technical field of nondestructive testing, and in particular relates to an adjustable rotating eddy current probe testing device and method. Background Art

[0002] With the development of intelligent detection equipment, non-destructive testing of pipelines has become more and more intelligent. At present, there is a type of pipeline that needs to be non-destructively tested, and its pipeline size is Φ50-Φ100cm.

[0003] The existing detection method is to install the eddy current probe on the robot and detect the above pipeline. This method has the following disadvantages: Traditional robots can only move the eddy current probe in a straight line in the pipeline, so as to perform non-destructive testing on a certain straight line area of ​​the pipeline, but cannot perform non-destructive testing on a circle area of ​​the pipeline. This results in the non-comprehensive non-destructive testing of the pipeline, and it is easy to miss areas.

[0004] Because pipelines have been in service for a long time, obstacles are inevitable on their inner walls. When the eddy current probe passes through an obstacle, it cannot adapt to the protruding obstacle and is prone to hit the obstacle, causing damage to the eddy current probe. Summary of the invention

[0005] The adjustable rotating eddy current probe detection device and method of the present invention are used to solve the above-mentioned problem.

[0006] The adjustable rotating eddy current probe detection device of the present invention comprises a tailstock, a rotating shaft is rotatably connected to the tailstock, and a headstock is rotatably connected to one end of the rotating shaft away from the tailstock; a driving motor for rotating the rotating shaft is provided on the tailstock; and a group of walking wheel assemblies for moving the detection device are provided on both the tailstock and the headstock; A slider is sleeved on the rotating shaft, and the slider is movably clamped on the rotating shaft. The slider can move along the axis of the rotating shaft, and the slider is located between the tail seat and the head seat; a limiting spring is sleeved on the rotating shaft, and the limiting spring is always in a compressed state, and the limiting spring is located between the head seat and the slider; The tailstock is provided with an electric slip ring assembly; the electric slip ring assembly and the slider are provided with a detection assembly, and the detection assembly includes: Eddy current probe module; A connecting rod 1, one end of which is rotatably connected to the eddy current probe module, and the other end of which is rotatably connected to the slider; One end of the connecting rod 2 is rotatably connected to the eddy current probe module, and the other end is rotatably connected to the electric slip ring assembly.

[0007] Furthermore, the electric slip ring assembly comprises: The collar, fixed on the tailstock, cannot conduct electricity; A plurality of conductive components are arranged on the ring; the conductive components include: a plurality of bracket rods fixed to the collar; The conductive ring is fixedly sleeved on the support rod; the axis of the conductive ring coincides with the axis of the rotating shaft; The movable ring is movably mounted on the conductive ring and can move along the conductive ring; The moving ring of each conductive component is electrically connected to the excitation coil or the receiving coil corresponding to the eddy current probe module; the sleeve ring, the support rod and the conductive ring can all conduct electricity.

[0008] By setting up the electric slip ring assembly, the detection assembly is ensured to rotate synchronously with the rotating shaft, and it is also convenient to power the detection assembly or receive data from the detection assembly. The non-conductive ring prevents short circuits of various conductive components.

[0009] Furthermore, each group of the walking wheel assembly includes a plurality of walking wheel units, and each walking wheel unit is arranged in a circular array around the axis of the rotating shaft; the walking wheel unit includes: A walking rod is fixed on the headstock or the tailstock, and its axis is arranged along the radial direction of the rotating shaft; The through rod is inserted into the walking rod and can move along the axis of the walking rod. The axis of the through rod coincides with the axis of the walking rod. The through rod passes through the end of the walking rod away from the headstock or the tailstock. The walking rod is provided with a through slot for the through rod to move. A driving wheel is installed at the end of the through rod that passes through the through slot. The walking spring is in the through slot, and the axis of the walking spring is parallel to the axis of the walking rod; one end of the walking spring abuts against one end of the walking rod, and the other end abuts against the end corresponding to the through slot; the walking spring is always in a compressed state; The vertical pole is fixed on the through pole, and the vertical pole passes through the walking pole, and the walking pole is provided with a sliding groove for the vertical pole to move; Adjusting nut, threaded onto the walking pole, used to limit the movement of the upright and through pole as a unit; A travel motor for rotating the driving wheel is installed on the through rod of the travel wheel assembly on the tailstock.

[0010] The length of the penetrating rod extending out of the walking rod can be changed by screwing the adjusting nut, thereby ensuring that the entire device can stably abut against the inner wall of the pipe by relying on the walking wheels. The adjusting nut can also prevent the penetrating rod from continuing to extend after the penetrating rod extends out of the walking rod to a certain length, making it easy for the operator to easily put the device into the pipe and avoiding temporarily overcoming the elastic force of the walking spring when putting the device into the pipe, thereby forcing the walking wheel unit to be inserted into the pipe.

[0011] Furthermore, a limiting nut is threadedly connected to the rotating shaft, and the limiting nut is located between the slider and the tailstock; under the action of the limiting spring, the slider abuts against the limiting nut.

[0012] Simply screw the limiting nut to adjust the distance between the eddy current probe module and the pipe. It is suitable for pipes with a diameter of 50~100 and is easy to adjust.

[0013] Furthermore, each of the movable rings is commonly and fixedly connected with a connecting block, the connecting block 2 is non-conductive, and the other end of the connecting rod 2 is rotatably connected to the connecting block.

[0014] By providing the connection block, all the moving rings can be rotated synchronously at the same time, and the connection of the end of the connecting rod 2 away from the eddy current probe module can also be facilitated.

[0015] Furthermore, the movable ring is provided with a notch for the support rod to pass through.

[0016] It is possible to facilitate the moving ring to pass through the support rod without affecting the movement of the moving ring along the conductive ring, thereby avoiding interference from the support rod and causing the moving ring to be unable to move.

[0017] Furthermore, the detection components are provided in two groups.

[0018] Furthermore, the rotating eddy current probe detection method comprises the following steps: S1: Place the adjustable rotating eddy current probe detection device into the pipeline to be detected from one end P1 of the pipeline; adjust the length of the travel wheel unit to ensure that the driving wheel contacts the inner wall of the pipeline and the axis of the rotating shaft coincides with the axis of the pipeline; adjust the eddy current probe module close to the inner wall of the pipeline; S2: Control the driving motor to make the rotating shaft rotate one circle, and receive the eddy current data generated after the eddy current probe module rotates one circle; S3: Control the travel motor to move the adjustable rotating eddy current probe detection device along the pipeline axis for a certain distance D and then stop; S4: repeat S2-S3; the adjustable rotating eddy current probe detection device moves to the other end P2 until the entire adjustable rotating eddy current probe detection device passes through the pipeline; S5: Re-insert the adjustable rotating eddy current probe detection device into the pipeline to be detected from one end P2 of the pipeline; adjust the length of the travel wheel unit to ensure that the driving wheel contacts the inner wall of the pipeline and the axis of the rotating shaft coincides with the axis of the pipeline; adjust the eddy current probe module close to the inner wall of the pipeline; S6: Control the driving motor to rotate the rotating shaft one circle, and receive the eddy current data generated after the eddy current probe module rotates one circle; S7: Control the travel motor to move the adjustable rotating eddy current probe detection device along the pipeline axis for a certain distance D and then stop; S8: Repeat S6-S7, and move the adjustable rotating eddy current probe detection device toward the other end P1 until the entire adjustable rotating eddy current probe detection device passes through the pipeline; S9: Integrate the two sets of eddy current data to jointly complete the non-destructive testing of the pipeline. Beneficial Effects

[0019] The device is provided with a detection component, which enables the eddy current probe module to adjust its position along the radial direction of the rotating axis, thereby achieving the purpose of being able to cope with pipes with a diameter of 50~100mm.

[0020] The detection component can rotate with the rotation of the rotating shaft to detect a circle of the pipeline. As the walking wheel component moves, a circle of the pipeline is continuously detected multiple times at intervals during the moving process until the entire inner wall of the pipeline is completely detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the device; Figure 2 It is a schematic diagram of the structure after the sleeve ring is connected with a conductive ring and a movable ring; Figure 3 It is a structural schematic diagram of the travel wheel unit.

[0022] 1. Tailstock; 2. Rotating axis; 3. Headstock; 4. Slider; 5. Limiting spring; 6. Limiting nut; 7. Collar; 8. Support rod; 9. Conductive ring; 10. Moving ring; 11. Connecting block 1; 12. Connecting block 2; 13. Connecting rod 1; 14. Connecting rod 2; 15. Traveling rod; 16. Through rod; 17. Vertical rod; 18. Slide; 19. Traveling spring; 20. Adjusting nut; 21. Driving wheel; 22. Traveling motor; 23. Driving motor; 24. Notch; DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0024] Example 1: See Figure 1 The adjustable rotating eddy current probe detection device comprises a tailstock 1. In this embodiment, the tailstock 1 is cylindrical in shape, and the axis of the tailstock 1 is arranged vertically.

[0025] The upper surface of the tailstock 1 is rotatably connected with a rotating shaft 2, and the axis of the rotating shaft 2 coincides with the axis of the tailstock 1. A headstock 3 is provided at one end of the rotating shaft 2 away from the tailstock 1. In this embodiment, the headstock 3 is cylindrical in shape, and the axis of the headstock 3 coincides with the axis of the rotating shaft 2. The rotating shaft 2 is also rotatably connected to the headstock 3.

[0026] A drive motor 23 is provided on the tailstock 1. The non-rotating shaft end of the drive motor 23 is fixed on the tailstock 1. The rotating shaft of the drive motor 23 is fixedly connected to the rotating shaft 2. The rotating shaft of the drive motor 23 coincides with the rotating shaft axis of the rotating shaft 2. The drive motor is used to drive the rotating shaft 2 to rotate.

[0027] The rotating shaft 2 is provided with a slider 4, which is movably mounted on the rotating shaft 2. The slider 4 can move along the axis of the rotating shaft 2. The slider 4 is located between the tailstock 1 and the headstock 3. While the slider 4 rotates synchronously with the rotating shaft 2, the slider 4 can also move relative to the rotating shaft 2 along the axis of the rotating shaft 2. The rotating shaft 2 is provided with a limiting spring 5, which is located between the slider 4 and the headstock 3. The limiting spring 5 is always in a compressed state. The two ends of the limiting spring 5 are respectively in contact with the headstock 3 and the slider 4.

[0028] A limiting nut 6 is threadedly connected to the rotating shaft 2, and the limiting nut 6 is located between the slider 4 and the tailstock 1. Under the elastic force of the limiting spring 5, the slider 4 abuts against the upper surface of the limiting nut 6.

[0029] See Figure 1 and Figure 2 The rotating shaft 2 is also provided with an electric slip ring assembly, which is located between the limiting nut 6 and the tailstock 1. The electric slip ring assembly includes: The collar 7 is sleeved on the rotating shaft 2, and the collar 7 is fixedly connected to the upper surface of the tailstock 1. The inner wall of the collar 7 is connected to the outer wall of the rotating shaft 2 through a bearing, and the collar 7 does not rotate with the rotation of the rotating shaft 2. In this embodiment, the collar 7 is a round tube, and the axis coincides with the axis of the rotating shaft 2. The material of the collar 7 is a non-conductive material.

[0030] Multiple groups of conductive components are provided on the collar 7, and in this embodiment, each conductive component is equidistantly provided along the axis of the collar 7. In this embodiment, there are eight groups of conductive components, and in other embodiments, there may be 4N groups of conductive components, where N is a natural number other than 0. Figure 2 , the conductive components include: A plurality of support rods 8 are fixed on the circumferential outer wall of the collar 7. In this embodiment, the axis of each support rod 8 is arranged along the radial direction of the collar 7, and each support rod 8 is arranged in an array along the axis of the collar 7.

[0031] The conductive ring 9 is sleeved on a plurality of support rods 8 at the same time, and one end of the support rod 8 away from the sleeve ring 7 is fixedly connected to the conductive ring 9, and the axis of the conductive ring 9 coincides with the axis of the sleeve ring 7. In this embodiment, the conductive ring 9 and each support rod 8 are integrally arranged, and the conductive ring 9 and the support rod 8 are both made of conductive metal.

[0032] The moving ring 10 is movably mounted on the conductive ring 9, can conduct electricity, and can move relative to the conductive ring 9 around the axis of the conductive ring 9. A notch 24 is provided on the moving ring 10, and the moving ring 10 can rely on the notch 24 to cross the support rod 8 during the movement, so as to avoid interference of the support rod 8 with the movement of the moving ring 10.

[0033] From top to bottom, each group of conductive components is recorded as: conductive component one, conductive component two, ..., conductive component eight.

[0034] Among them, the moving rings 10 of the conductive components 1, ..., and the conductive components 4 are commonly fixedly connected with a connecting block; similarly, the moving rings 10 of the conductive components 5, ..., and the conductive components 8 are also commonly fixedly connected with a connecting block. The two connecting blocks are respectively connecting block 11 and connecting block 2 12, and both the connecting block 11 and the connecting block 2 12 are non-conductive. The function of the connecting block 11 is to connect the moving rings 10 of the conductive components 1, ..., and the conductive components 4 as a whole, and rotate synchronously as a whole. Similarly, the function of the connecting block 2 12 is to connect the moving rings 10 of the conductive components 5, ..., and the conductive components 8 as a whole, and rotate synchronously as a whole.

[0035] It also includes N groups of detection components. Since N=2, there are two groups of detection components in this embodiment. The detection components include: The eddy current probe module is an existing technology. It contains an excitation coil and a receiving coil. The excitation coil can generate an alternating magnetic field after being energized. The receiving coil can generate an induced potential according to the eddy current generated by the pipeline, and the size of the induced potential is monitored by a sensor.

[0036] One end of the connecting rod 13 is rotatably connected to the slider 4, and the other end is rotatably connected to the eddy current probe module.

[0037] One end of the connecting rod 2 14 is rotatably connected to the eddy current probe module, and the other end is rotatably connected to the corresponding connecting block. That is, the corresponding ends of the connecting rods 2 14 of the two detection components are rotatably connected to the connecting block 1 11 and the connecting block 2 12 respectively. The axes of the connecting rods 1 and 2 are parallel to the horizontal plane.

[0038] Assume that the two groups of eddy current probe modules are eddy current probe module A and eddy current probe module B respectively.

[0039] Both the eddy current probe module A and the eddy current probe module B have two groups of data lines, which are respectively recorded as magnetic field generating lines and eddy current data lines. There are two magnetic field generating lines and two eddy current data lines respectively.

[0040] Since the connection modes of the eddy current probe module A and the eddy current probe module B are the same, in this embodiment, only the connection mode of the eddy current probe module A is taken as an example for description.

[0041] One end of one of the magnetic field generating wires in the eddy current probe module A is electrically connected to one end of the excitation coil, and the other end passes through the eddy current probe module A and is electrically connected to the moving ring 10 of the conductive component one; the other end of the excitation coil is electrically connected to the moving ring 10 of the conductive component two through another magnetic field generating wire in the same way. The two magnetic field generating wires are Figure 1 The two red wires bound on the connecting rod 2 14 in the figure, the meaning of binding in this article is to use a cable tie to tie on the connecting rod 2 14. The positive power line for powering the eddy current probe module A passes through the ring 7 and is electrically connected to the ring 7 of the conductive component 1; the negative power line for powering the eddy current probe module A passes through the ring 7 and is electrically connected to the ring 7 of the conductive component 2. The positive power line and the negative power line are the two red lines passed through the ring 7. The positive line and the negative line in this scheme are only used to distinguish nouns, because the alternating magnetic field generated in the excitation coil and the current in the excitation coil are alternating current, and the method is not unchanged.

[0042] The current flow direction when the excitation coil in the eddy current probe module A is energized is: the current flows from the positive power line, sequentially through the support rod 8 of the conductive component one, the conductive ring 9 and the mobile ring 10, and then enters one end of the excitation coil through one of the magnetic field generating lines, and then from the other end of the excitation coil, it flows through another magnetic field generating line, the mobile ring 10 of the conductive component two, the conductive ring 9, the support rod 8, and flows to the negative power line, thereby forming a closed loop. The opposite current flow direction is not repeated. The excitation coil in the eddy current probe module A can pass alternating current to generate an alternating magnetic field. The power supply principle of the eddy current probe module B is the same, but the excitation coil of the eddy current probe module B is powered by the conductive components five and six, which will not be repeated.

[0043] One end of one of the eddy current data lines in the eddy current probe module A is electrically connected to one end of the receiving coil, and the other end passes through the eddy current probe module and is electrically connected to the moving ring 10 of the conductive component three; the other end of the receiving coil is electrically connected to the moving ring 10 of the conductive component four through another eddy current data line, that is, Figure 1 The two blue lines are bound to the connecting rod 2 14.

[0044] A data line capable of receiving eddy current data in the eddy current probe module A passes through the ring 7 and is electrically connected to the support rod 8 of the conductive component three; another data line capable of receiving eddy current data in the eddy current probe module A passes through the ring 7 and is electrically connected to the support rod 8 of the conductive component four, thereby forming a closed loop.

[0045] The receiving coil in the eddy current probe module A generates eddy currents due to the alternating magnetic field. One of the directions of the eddy current current in the receiving coil is: the current enters one end of the receiving coil from a data line of the eddy current data through the support rod 8 of the conductive component three, the conductive ring 9, the moving ring 10, and one of the eddy current data lines, and then from the other end of the receiving coil, it flows to another data line through another eddy current data line, the moving ring 10 of the conductive component four, the conductive ring 9, and the support rod 8. According to the knowledge related to eddy currents, the direction of the current in the closed loop is opposite to the direction of the current in the excitation coil, so the direction of the eddy current will also change, which belongs to the prior art and will not be repeated. A current sensor is connected in series in the loop to detect the eddy current value in real time. The receiving principle of the eddy current probe module B is the same as that of the eddy current probe module B, but the receiving coil of the eddy current probe module B is connected by the conductive component seven and the conductive component eight, which will not be repeated.

[0046] It also includes two sets of running wheel assemblies, which are respectively connected to the tailstock 1 and the headstock 3, wherein the running wheel assembly on the headstock 3 is a driven assembly and has no power; the running wheel assembly on the tailstock is an active assembly and has power. Each set of running wheel assemblies includes a plurality of running wheel units, and each running wheel unit is arranged in a circular array around the axis of the tailstock 1 or the headstock 3.

[0047] See Figure 1 and Figure 3 , the travel wheel unit includes: The walking rod 15 is fixed on the circumferential side wall of the headstock 3 or the tailstock 1 , and the axis is arranged along the radial direction of the headstock 3 or the tailstock 1 .

[0048] The through rod 16 is inserted into the corresponding walking rod 15 and can move relative to the walking rod 15. The walking rod 15 has a through slot for the through rod 16 to move. The through rod 16 passes out from one end of the walking rod 15 away from the headstock 3 or the tailstock 1.

[0049] The vertical rod 17 is fixed on the circumferential side wall of one end of the through rod 16 in the walking rod 15, and the axis of the vertical rod 17 is along the radial direction of the through rod 16. The walking rod 15 is provided with a slide groove 18 for the vertical rod 17 to move, and the length direction of the slide groove 18 is parallel to the axis direction of the walking rod 15. One end of the vertical rod 17 away from the through rod 16 passes through the slide groove 18.

[0050] The walking spring 19 is in the through slot of the walking rod 15, and its axis is parallel to the axis of the walking rod 15; the walking spring 19 is always in a compressed state, one end of the walking spring 19 abuts against the end surface of the through slot, and the other end abuts against the end corresponding to the through slot.

[0051] The adjusting nut 20 is threadedly connected to the traveling rod 15. In the radial direction of the traveling rod 15, assuming that the outer wall of the headstock 3 or the tailstock 1 is a surface P, the adjusting nut 20 is located between the vertical rod 15 and the surface P; in other words, under the elastic force of the traveling spring 19, the vertical rod 17 abuts against the surface of the adjusting nut 20 close to the headstock 3 or the tailstock 1, and the adjusting nut 20 is used to limit the penetration rod 16 from continuously extending out of the traveling rod 15.

[0052] The driving wheel 21 is rotatably connected to one end of the penetrating rod 16 away from the traveling spring 19, and the axis of the driving wheel 21 is arranged horizontally.

[0053] The difference between the two sets of travel wheel assemblies is that a travel motor 22 is fixedly mounted on the through rod 16 of the travel wheel assembly on the tailstock 1, and the travel motor 22 is electrically connected to the corresponding driving wheel 21 through a gear set, and each travel motor 22 is used to drive the corresponding driving wheel 21 to rotate. The power line for supplying power to each travel motor 22 is tied to the travel rod 15 and passes through the tailstock 1.

[0054] The use process of this device is: First, the operator needs to slowly turn the adjusting nut 20 to allow the elastic force of the traveling spring 19 to push the penetrating rod 16 and the driving wheel 21 to move, so that the driving wheel 21 can rely on the elastic force of the traveling spring 19 to stably support the inner wall of the pipe with a diameter of 50 to 100 mm. Stop turning the adjusting nut 20 until the device can be supported on the inner wall of the pipe.

[0055] Then, tighten the limiting nut 6 to allow the elastic force of the limiting spring 5 to push the slider 4 to move on the rotating shaft 2, ensuring that the two sets of detection components are close to the inner wall of the pipeline at the same time, ignoring the error caused by the unequal length of the two connecting rods 1 or 2.

[0056] The lower end of the tailstock 1 is connected to relevant wires in a wired manner for power supply and data reception. As the device moves in the pipeline, it is constantly dragged. This part of the wire is long enough to meet the detection requirements.

[0057] When the device stops moving, under the action of the driving motor 23, the rotating shaft 2, the limiting nut 6, the slider 4 and the two detection components as a whole rotate 360 ​​degrees around the central axis of the rotating shaft 2, detect one circle of the inner wall of the pipeline, and obtain the eddy current data of one circle of the inner wall of the pipeline. Then the device continues to move forward for a distance and stops. Under the action of the driving motor 23 again, the rotating shaft 2, the limiting nut 6, the slider 4 and the two detection components as a whole rotate 360 ​​degrees around the central axis of the rotating shaft 2, and detect one circle of the inner wall of the pipeline. And so on... through continuous intermittent advancement, the two detection components rotate 360 ​​degrees and continuously detect the complete inner wall of the pipeline.

[0058] If the detection assembly encounters an obstacle, such as a bulge, it will force the slider 4 to move upward, further compressing the limiting spring 5. For example, Figure 1 When the left detection assembly encounters an obstacle, the slider 4 is forced to move upward, thereby adapting to the protrusion caused by the obstacle and not causing a serious collision with the obstacle.

[0059] Embodiment 2: An adjustable rotating eddy current probe detection method comprises the following steps: S1: Place the adjustable rotating eddy current probe detection device into the pipeline to be detected from one end P1 of the pipeline; adjust the length of the walking wheel unit to ensure that the driving wheel 21 contacts the inner wall of the pipeline and the axis of the rotating shaft 2 coincides with the axis of the pipeline; adjust the eddy current probe module close to the inner wall of the pipeline; S2: Control the driving motor to make the rotating shaft 2 rotate one circle, and receive the eddy current data generated after the eddy current probe module rotates one circle; S3: Control the travel motor to move the adjustable rotating eddy current probe detection device along the pipeline axis for a certain distance D and then stop.

[0060] S4: repeat S2-S3; the adjustable rotating eddy current probe detection device moves to the other end P2 until the entire adjustable rotating eddy current probe detection device passes through the pipeline; S5: Re-insert the adjustable rotating eddy current probe detection device into the pipeline to be detected from one end P2 of the pipeline; adjust the length of the walking wheel unit to ensure that the driving wheel 21 contacts the inner wall of the pipeline and the axis of the rotating shaft 2 coincides with the axis of the pipeline; adjust the eddy current probe module close to the inner wall of the pipeline; S6: Control the driving motor to make the rotating shaft 2 rotate one circle, and receive the eddy current data generated after the eddy current probe module rotates one circle; S7: Control the travel motor to move the adjustable rotating eddy current probe detection device along the pipeline axis for a certain distance D and then stop.

[0061] S8: Repeat S6-S7, and move the adjustable rotating eddy current probe detection device toward the other end P1 until the entire adjustable rotating eddy current probe detection device passes through the pipeline; S9: Integrate the two sets of eddy current data to jointly complete the non-destructive testing of the pipeline.

[0062] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. Adjustable rotating eddy current probe detection device, characterized in that: The invention comprises a tailstock (1), a rotating shaft (2) being rotatably connected to the tailstock (1), and a headstock (3) being rotatably connected to one end of the rotating shaft (2) away from the tailstock (1); a driving motor (23) for rotating the rotating shaft (2) is provided on the tailstock (1); and a group of walking wheel assemblies for moving the detection device are provided on both the tailstock (1) and the headstock (3); A slider (4) is sleeved on the rotating shaft (2), the slider (4) is movably clamped on the rotating shaft (2), the slider (4) can move along the axis of the rotating shaft (2), and the slider (4) is located between the tail seat (1) and the head seat (3); a limiting spring (5) is sleeved on the rotating shaft (2), the limiting spring (5) is always in a compressed state, and the limiting spring (5) is located between the head seat (3) and the slider (4); An electric slip ring assembly is arranged on the tailstock (1); a detection assembly is arranged on the electric slip ring assembly and the slider (4), and the detection assembly comprises: Eddy current probe module; A connecting rod (13) having one end rotatably connected to the eddy current probe module and the other end rotatably connected to the slider (4); The second connecting rod (14) has one end rotatably connected to the eddy current probe module and the other end rotatably connected to the electric slip ring assembly.

2. The adjustable rotating eddy current probe detection device according to claim 1, characterized in that: The electric slip ring assembly comprises: The collar (7) is fixed on the tailstock (1) and cannot conduct electricity; A plurality of conductive components are arranged on the collar (7); the conductive components include: A plurality of support rods (8) fixed on the collar (7); The conductive ring (9) is fixedly sleeved on the support rod (8); the axis of the conductive ring (9) coincides with the axis of the rotating shaft (2); A movable ring (10) is movably mounted on the conductive ring (9) and is movable along the conductive ring (9); The moving ring (10) of each conductive component is electrically connected to the excitation coil or receiving coil corresponding to the eddy current probe module; the sleeve ring (7), the support rod (8) and the conductive ring (9) are all capable of conducting electricity.

3. The adjustable rotating eddy current probe detection device according to claim 1, characterized in that: Each group of the walking wheel assembly comprises a plurality of walking wheel units, each of which is arranged in a circular array around the axis of the rotating shaft (2); the walking wheel unit comprises: A walking rod (15) is fixed on the headstock (3) or the tailstock (1), and its axis is arranged along the radial direction of the rotating shaft (2); A penetration rod (16) is inserted into the traveling rod (15) and can move along the axis of the traveling rod (15). The axis of the penetration rod (16) coincides with the axis of the traveling rod (15). The penetration rod (16) passes through an end of the traveling rod (15) away from the headstock (3) or the tailstock (1). The traveling rod (15) is provided with a penetration groove for the penetration rod (16) to move. A driving wheel (21) is installed at one end of the penetration rod (16) passing through the penetration groove. The walking spring (19) is in the through groove, and the axis of the walking spring (19) is parallel to the axis of the walking rod (15); one end of the walking spring (19) abuts against one end of the walking rod (15), and the other end abuts against the end corresponding to the through groove; the walking spring (19) is always in a compressed state; A vertical rod (17) is fixed on the through rod (16), the vertical rod (17) passes through the walking rod (15), and a sliding groove (18) for the vertical rod (17) to move is provided on the walking rod (15); An adjusting nut (20) is threadedly connected to the walking rod (15) and is used to limit the movement of the vertical rod (17) and the through rod (16) as a whole; A travel motor (22) for rotating a driving wheel (21) is installed on a penetration rod (16) of a travel wheel assembly on the tailstock (1).

4. The adjustable rotating eddy current probe detection device according to claim 2, characterized in that: A limiting nut (6) is threadedly connected to the rotating shaft (2), and the limiting nut (6) is located between the slider (4) and the tailstock (1); under the action of the limiting spring (5), the slider (4) abuts against the limiting nut (6).

5. The adjustable rotating eddy current probe detection device according to claim 2, characterized in that: Each of the movable rings (10) is fixedly connected with a connecting block, which is non-conductive, and the other end of the second connecting rod (14) is rotatably connected to the connecting block.

6. The adjustable rotating eddy current probe detection device according to claim 2, characterized in that: The movable ring (10) is provided with a notch for the support rod (8) to pass through.

7. The adjustable rotating eddy current probe detection device according to claim 2, characterized in that: The detection components are provided in two groups.

8. A rotating eddy current probe detection method, based on the adjustable rotating eddy current probe detection device according to claim 3, characterized in that: The following steps are involved: S1: Place the adjustable rotating eddy current probe detection device into the pipeline to be detected from one end P1 of the pipeline; adjust the length of the travel wheel unit to ensure that the driving wheel contacts the inner wall of the pipeline and the axis of the rotating shaft coincides with the axis of the pipeline; adjust the eddy current probe module close to the inner wall of the pipeline; S2: Control the driving motor to make the rotating shaft rotate one circle, and receive the eddy current data generated after the eddy current probe module rotates one circle; S3: Control the travel motor to make the adjustable rotating eddy current probe detection device move a certain distance D along the pipeline axis and then stop; S4: repeat S2-S3; the adjustable rotating eddy current probe detection device moves to the other end P2 until the entire adjustable rotating eddy current probe detection device passes through the pipeline; S5: Re-insert the adjustable rotating eddy current probe detection device into the pipeline to be detected from one end P2 of the pipeline; adjust the length of the travel wheel unit to ensure that the driving wheel contacts the inner wall of the pipeline and the axis of the rotating shaft coincides with the axis of the pipeline; adjust the eddy current probe module close to the inner wall of the pipeline; S6: Control the driving motor to rotate the rotating shaft one circle, and receive the eddy current data generated after the eddy current probe module rotates one circle; S7: Control the travel motor to move the adjustable rotating eddy current probe detection device along the pipeline axis for a certain distance D and then stop; S8: Repeat S6-S7, and move the adjustable rotating eddy current probe detection device toward the other end P1 until the entire adjustable rotating eddy current probe detection device passes through the pipeline; S9: Integrate the two sets of eddy current data to jointly complete the non-destructive testing of the pipeline.

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