Non-contact pressing constant pressure type fitting eddy current detection device and detection method thereof

Abstract

The application discloses a non-contact elastic pressing constant pressure type vortex detection device and a detection method thereof. The vortex detection device comprises a detection device shell, a vortex detection probe and a vortex detection sensor arranged in the vortex detection probe. The vortex detection device further comprises an elastic pressing device. The elastic pressing device is composed of a plurality of same-pole opposite magnets. The magnets are freely slidably arranged at the upper end of a vertical transmission rod of the vortex detection probe. The vortex detection sensor can realize space vector multidirectional angle transmission type adjustment, can realize small amplitude swing around the up and down and the left and right, and can adapt the detection of the detection sensor to the detection surface with different radian. The constant pressure generated by repulsion of the same-pole magnets can achieve the effect of adaptive height adjustment and surface fitting.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of non-destructive testing, in particular to a detection device for an irregularly curved metal surface, and more particularly to a non-contact spring-pressing constant-pressure type vortex detection device and a detection method thereof. BACKGROUND

[0002] As shown in Figure 1 , the tread (11) of a steel rail (1) is used for a long time, and the degree of wear is different, so the surface curvature is often changing. Long-term monitoring and regular detection are required for rail safety use due to the demand for track safety. Vortex detection is often the first choice as a non-destructive testing method more suitable for outdoor environments. As shown in Figure 1 , the detection device (2) is electrically connected to the vortex detector (3).

[0003] However, as shown in Figure 2 , the surface of the steel rail (1) is often worn during long-term use, from the curved surface (11a) to the curved surface (11b) used for a long time in service. As shown in Figure 3 and Figure 4 , when the curved surface (11a) is the sensor (21') angle of the vortex detection device (2'), the sensor (21') can be perfectly attached to the rail tread. As shown in Figure 4 , the curved surface (11b) cannot form a perfect fit. Vortex detection is very sensitive to lift, and it is very likely that the curved surface (11b) cannot achieve effective detection due to the large lift value.

[0004] To solve the above problems, the present application adopts the following technical scheme for further improvement. SUMMARY

[0005] The purpose of the present application is to provide a non-contact spring-pressing constant-pressure type vortex detection device and a detection method thereof. The technical scheme disclosed is as follows:

[0006] A non-contact spring-pressing constant-pressure type vortex detection device for vortex detection of easily worn metal surfaces such as in-service rail treads, comprising a detection device housing, a vortex detection probe, and a vortex detection sensor disposed in the vortex detection probe. The characteristic is that it further comprises a spring-pressing device, which is composed of a plurality of same-pole opposite magnets, and the magnets are freely slidably arranged at the upper end of the vertical transmission rod of the vortex detection probe.

[0007] The same-pole opposite magnet is arranged as several magnets in horizontal parallel arrangement, wherein the first magnet away from the one end of the detection surface is fixed to the inner top surface of the detection device shell, and the second magnet close to the one end of the detection surface is fixed to the end surface of the vertical transmission rod of the flow detection probe away from the detection surface. The repulsive magnetic force formed by the magnet fixed to the inner top surface of the detection device shell and the magnet fixed to the end surface of the vertical transmission rod of the detection device pushes the detection probe device to the detection surface, and the fixed pushing of the detection device shell forms a reaction force, which plays a role of force enhancement. The thrust of the magnet is the suspension force, the spatial adjustment degree of the force is large, a more gentle pressure is formed, the detection probe is gently pushed to the detection surface, and when the detection surface of the detected object with different radii of curvature is encountered, the angle adjustment is realized, so that the detection surface of the detection probe is more attached to the detection surface of the detected object.

[0008] Further, the same-pole opposite magnet further comprises a third magnet arranged between the first magnet and the second magnet, and the movable third magnet is suspended in the space position between the first magnet and the second magnet. When the three magnets are in the same-pole opposite state, the third magnet in the middle is in a completely suspended state, and when the detection surface is attached to a curved surface with different radii, the swing adjustment is formed, and the detection surface of the detection probe is more flexible.

[0009] Further, a balance plate is arranged on the third magnet, and the balance plate is fixedly arranged on the periphery of the third magnet. The balance plate is used for gravity device when the detection surface of the detection probe is attached to a detection surface with different radii and swing adjustment, and the balance plate is made of metal with good magnetic conductivity, which plays a good role in magnetic force transmission and greatly reduces the loss of magnetic energy.

[0010] Further, the first magnet, the second magnet and the third magnet are arranged as three same-shaped circular ring magnets, and the three circular ring magnets are slidably sleeved on the cylindrical guide shaft arranged at the end of the vertical transmission rod of the detection device away from the detection surface. The three circular ring magnets are sleeved on the cylindrical guide shaft of the detection device, and the sliding guide rail plays a role of swing adjustment limiting.

[0011] Further, the eddy current detection probe further comprises an angle adjustment mechanism, the angle adjustment mechanism is arranged as a vertical transmission rod and a horizontal transmission rod connected in rotation, the middle part of the horizontal transmission rod is connected to the end of the vertical transmission rod through a rotating shaft, the elastic pressing device is fixedly arranged at the upper end of the vertical transmission rod, and the eddy current detection sensor is fixedly arranged at the two ends of the horizontal transmission rod away from the outer side of the rotating shaft. When the eddy current detection probe of the eddy current detection device approaches the detected surface, the elastic pressing device is connected to the horizontal transmission rod through the vertical transmission rod, so as to realize swing rotary adjustment of the angle of the eddy current detection probe.

[0012] Further, the transverse transmission rod further comprises a rotating sleeve fixed to one end of the transverse transmission rod close to the vertical transmission rod, and the rotating sleeve is fixed to the rotating shaft of the vertical transmission rod in a rotating manner. The structure of the rotating sleeve realizes self-rotating adjustment of the angle of the eddy current detection probe, so that the eddy current detection probe realizes fine adjustment of the angle in four directions of front, back, left and right.

[0013] Further, the vertical transmission rod is provided with a clamping groove at the end of the rotating shaft, the rotating shaft is fixed in the rotating hole of the clamping groove, and the transverse transmission rod is fixed to the vertical transmission rod in a rotating manner through the rotating shaft arranged in the rotating hole of the clamping groove.

[0014] Further, the transverse transmission rod is fixed to the lower end of the vertical transmission rod at the center position, the two outer ends of the transverse transmission rod are respectively provided with a first eddy current detection sensor and a second eddy current detection sensor, the transverse transmission rod is composed of a first transverse transmission rod and a second transverse transmission rod, the inner ends of the first transverse transmission rod and the second transverse transmission rod are respectively connected to the lower end of the vertical transmission rod in a rotating manner, and the outer ends are respectively connected to a first eddy current detection probe and a second eddy current detection probe. That is, the detection sensors at the two ends of the transverse transmission rod are symmetrically arranged on both sides of the lower end of the vertical transmission rod, so as to realize symmetric swing balance adjustment of the first eddy current detection sensor and the second eddy current detection sensor. The first eddy current detection probe and the second eddy current detection probe respectively realize rotating adjustment of the angle with the lower end of the vertical transmission rod as the center.

[0015] Further, the height adjustment device is arranged on the side wall of the detection device shell, and the height adjustment device divides the detection device shell into two parts with a sleeve type height adjustment. The sleeve type height adjustment device can be arranged in a threaded rotating adjustment or a sliding type clamping and fixing adjustment structure on the shell. The height adjustment device can be arranged at any position on the side wall of the detection device shell, preferably arranged at any position in the middle, or arranged at the end position close to the metal surface to be detected.

[0016] The application also discloses a non-contact elastic pressure constant pressure type detection method, which is used for eddy current detection defect evaluation method of metal surfaces such as in-service rail tread and the like which are easy to wear, and the method is characterized in that the above-mentioned detection device is used, and the specific eddy current detection method steps are as follows:

[0017] a. Height adjustment of the detection device: the detection probe of the eddy current detection device is attached to the surface of the metal device for scanning detection, and the height of the shell is adjusted through the sleeve type height adjustment device arranged on the shell.

[0018] b. Detection device angle adjustment: through the rotary connection structure of the vertical transmission rod and the horizontal transmission rod of the detection probe, the angle direction of the detection sensor is adjusted;

[0019] c. Actual detection: the eddy current detection device searches and detects to obtain detection data, and the detection instrument performs statistical analysis;

[0020] d. Repeat the scanning detection: repeat the above steps, and selectively search and detect from step a or step b.

[0021] In the actual detection process, when the height and the angle are unchanged, the repeated scanning detection does not need to be adjusted, and when the height or the curvature of the detected metal surface changes, the height position or the angle direction of the detection probe is flexibly adjusted to realize flexible and accurate detection.

[0022] According to the above technical scheme, the eddy current detection device and the detection method have the following beneficial effects: the eddy current detection device and the detection method are non-contact, the three magnets are arranged in a manner that the same poles of two magnets face each other, the middle magnet is in a completely suspended state, when the detection surface is attached to a curved surface with different radii, the middle magnet is adjusted in a swinging manner, and the detection surface of the detection probe is adjusted more flexibly. A balance plate is arranged on the third magnet in a completely suspended state, which is used as a gravity device when the detection surface of the detection probe is attached to a detection surface with different radii and swings during adjustment. In addition, the balance plate is made of a metal with good magnetic conductivity, which plays a good role in magnetic conduction and greatly reduces the loss of magnetic energy. In addition, the horizontal transmission rod and the vertical transmission rod on the eddy current detection device are connected in a rotating manner, so that the eddy current detection sensor can be adjusted in multiple directions and angles in a transmission manner. The detection sensor can be adjusted in a small amplitude swing, and the detection of the detection sensor can be adapted to the detection surface with different radii. In addition, the same-pole magnets repel each other to generate a constant pressure, so that the height adjustment and the attachment to the detected surface can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the use state of the prior art detection device;

[0024] Figure 2 It is a schematic diagram of the use state of the prior art detection device;

[0025] Figure 3 It is a schematic diagram of the use state of the prior art detection device;

[0026] Figure 4 It is a schematic diagram of the use state of the prior art detection device;

[0027] Figure 5 It is a schematic diagram of the use state of the detection device of the best embodiment of the present application;

[0028] Figure 6 Another embodiment of the application is a schematic diagram of the detection device in use;

[0029] Figure 7 Another embodiment of the application is a schematic diagram of the detection device in use;

[0030] Figure 8 Another embodiment of the application is a schematic diagram of the detection device in use;

[0031] Figure 9 Another embodiment of the application is a schematic diagram of the detection device in use;

[0032] Figure 10 Another embodiment of the application is a schematic diagram of the detection device in use;

[0033] Figure 11 Another embodiment of the application is a schematic diagram of the detection device in use;

[0034] Figure 12 Another embodiment of the application is a schematic diagram of the detection device in use;

[0035] Figure 13 Another embodiment of the application is a schematic diagram of the detection device in use;

[0036] Figure 14 Another embodiment of the application is a schematic diagram of the detection device in use;

[0037] Figure 15 Another embodiment of the application is a schematic diagram of the detection device in use;

[0038] Figure 16 Another embodiment of the application is a schematic diagram of the detection device in use;

[0039] Figure 17 Another embodiment of the application is a schematic diagram of the detection device in use; DETAILED DESCRIPTION

[0040] The application will be further described with reference to the drawings and specific embodiments.

[0041] As Figures 5 to 17As shown, a non-contact elastic pressure constant pressure type fitting eddy current detection device for the eddy current detection device of the easily worn metal surface such as the tread 11 of the in-service steel rail 1, connected to the detection instrument 3 through the lead or wireless, including the detection device shell 4, the eddy current detection probe 21 and the eddy current detection sensor 211 arranged in the eddy current detection probe 21, and the elastic pressure device 23, the elastic pressure device 23 is arranged as a plurality of same-pole opposite magnets, and the magnet is freely slidably arranged on the upper end of the vertical transmission rod 221 of the flow detection probe 21.

[0042] As shown in Figure 7 and Figure 8 , the same-pole opposite magnets are arranged as a plurality of horizontally parallel magnets, wherein the first magnet 231a away from the detection surface end is fixed to the inner top surface of the detection device shell 4, and the second magnet 231c close to the detection surface end is fixed to the end surface of the vertical transmission rod 221 of the flow detection probe away from the detection surface. The repulsive magnetic force formed by the magnet fixed to the inner top surface of the detection device shell 4 and the magnet fixed to the end surface of the vertical transmission rod 221 of the detection device pushes the detection probe device to the detection surface, and the fixed pushing of the detection device shell 4 forms a reaction force, which plays a role in force enhancement. The thrust of the magnet is the suspension force, which has a large spatial adjustment degree of force, forming a more gentle pressure, which gently pushes the detection probe to the detection surface, and when it encounters the detection surface of the detected object with different curvature surfaces, it has the effect of adjusting the angle, so that the detection surface of the detection probe is more fitted to the detection surface of the detected object.

[0043] As shown in Figure 8 , the same-pole opposite magnets also include a third magnet 231b arranged between the first magnet 231a and the second magnet 231c, and the movable third magnet 231b is suspended in the space position between the first magnet 231a and the second magnet 231c. When the three magnets are opposite to each other, the magnet in the middle (the third magnet 231b) is in a completely suspended state, and when the detection surface is fitted to different curvature surfaces, it forms a swing adjustment, which is more flexible in adjusting the detection surface of the detection probe.

[0044] As shown in Figure 7 and Figure 8 , the third magnet 231b is provided with a balance plate 232, and the balance plate 232 is adapted to be fixed to the periphery of the third magnet 231b. The balance plate 232 is arranged on the completely suspended third magnet 231b, which is used as a gravity device when the detection probe detection surface is fitted to different curvature detection surfaces and swings during adjustment, and the balance plate 232 is made of a metal with good magnetic conductivity, which plays a good role in magnetic force transmission and greatly reduces the loss of magnetic energy. Figure 7 and Figure 8As shown, the middle magnet of the three circular ring magnets is provided with a balance plate 232. The balance plate 232 has a central circular hole 2321 for accommodating the circular ring magnet 231b, and the balance plate 232 not only forms the balance of gravity, but also plays a good role in magnetic force transmission. The first magnet 231a, the second magnet 231c and the third magnet 231b are provided as three circular ring magnets of the same shape, and the three circular ring magnets are slidably sleeved on the cylindrical guide shaft provided at the end of the vertical transmission rod 221 away from the detection surface of the detection device, and the polarities of the two circular ring magnets are opposite. The three circular ring magnets are sleeved on the cylindrical guide shaft of the detection device, and the sliding guide rail functions while serving as a swing adjustment limit.

[0045] As shown in Figures 5 to 14 , the eddy current detection probe 21 further comprises an angle adjusting mechanism, which is provided as a rotatingly connected vertical transmission rod 221 and a horizontal transmission rod 222. The middle part of the horizontal transmission rod 222 is rotatingly connected to the end of the vertical transmission rod 221 by a rotating shaft, and the elastic pressing device 23 is fixedly provided at the upper end of the vertical transmission rod 221. The eddy current detection sensor 211 is fixedly provided at the two ends of the horizontal transmission rod 222 away from the outside of the rotating shaft. When the eddy current detection probe 21 of the eddy current detection device approaches the detected surface, the elastic pressing device 23 is rotatingly connected to the horizontal transmission rod 222 through the vertical transmission rod 221, so as to realize swing rotary adjustment of the angle of the eddy current detection probe 21. As shown in Figure 14 , the different eddy current detection sensors 211 are adjusted in different angle directions h1, h2, h3, and are adapted to different arc detection surfaces.

[0046] As shown in Figure 15 , the horizontal transmission rod 222 further comprises a rotating sleeve, which is fixed to one end of the horizontal transmission rod 222 close to the vertical transmission rod 221 and is rotatingly fixed to the rotating shaft of the vertical transmission rod 221 in an integral manner with the horizontal transmission rod 222. The structure of the rotating sleeve realizes self-rotary adjustment of the angle of the eddy current detection probe 21, so that the eddy current detection probe 21 realizes angle fine adjustment in four directions of front, back, left and right.

[0047] As shown in Figure 14 , the vertical transmission rod 221 is provided with a clamping groove at the end of the rotating shaft, and the rotating shaft is rotatingly fixed to the vertical transmission rod 221 by being fixed in the rotating hole of the clamping groove and the fixing holes provided on both sides of the rotating hole.

[0048] As shown in Figure 14As shown, the horizontal transmission rod 222 is centrally fixed to the lower end of the vertical transmission rod 221. A first eddy current detection sensor 211 and a second eddy current detection sensor 211 are respectively installed at the two outer ends of the horizontal transmission rod 222. The horizontal transmission rod 222 is composed of two parts: a first horizontal transmission rod 222a and a second horizontal transmission rod 222b. The inner ends of the first horizontal transmission rod 222a and the second horizontal transmission rod 222b are rotatably connected to the lower end of the vertical transmission rod 221, and the outer ends are respectively connected to the first eddy current detection sensor 211a and the second eddy current detection sensor 211b. That is, the detection sensors at both ends of the horizontal transmission rod 222 are symmetrically arranged on both sides of the lower end of the vertical transmission rod 221, realizing symmetrical swing balance adjustment of the first eddy current detection sensor 211 and the second eddy current detection sensor 211. Furthermore, the first eddy current detection sensor 211a and the second eddy current detection sensor 211b respectively achieve rotational adjustment angles relative to the lower end of the vertical transmission rod.

[0049] like Figure 17 As shown, a height adjustment device 5 is provided on the side wall of the detection device housing 4, dividing the detection device housing 4 into two parts with adjustable height via a sleeve. The sleeve-type height adjustment device 5 can be configured as a screw-type rotary adjustment on the housing 4, or a sliding locking and fixing adjustment structure. The height adjustment device 55 can be set at any position on the side wall of the detection device housing 4, preferably at any middle position, or at the end position near the metal surface being detected.

[0050] This invention also discloses a non-contact, constant-pressure elastic bonding detection method for evaluating defects in easily worn metal surfaces such as in-service rail treads using eddy current testing. The specific steps of the eddy current testing method are as follows:

[0051] a. Height adjustment of the detection device: The detection probe of the eddy current detection device is placed against the surface of the metal device for scanning and detection. The height of the housing 4 is adjusted by the sleeve-type height adjustment device 5 provided in the housing 4.

[0052] b. Angle adjustment of the detection device: The angle of the detection sensor is adjusted by the rotary connection structure of the vertical transmission rod 221 and the horizontal transmission rod 222 of the detection probe;

[0053] c. Actual testing: The eddy current testing device is used to search and test, and the test data is obtained and statistically analyzed by the testing instrument;

[0054] d. Repeated scan detection: Repeat the above steps, selectively performing a scan detection from step a or step b.

[0055] In actual detection, when the height and angle are unchanged, the repeated scanning detection does not repeat the adjustment, and when the height or the curvature of the detected metal surface changes, the height position or the angle direction of the detection probe is flexibly adjusted to realize flexible and accurate detection.

[0056] The above is one of the embodiments of the present application. In addition, it should be noted that equivalent or simple changes made in accordance with the structure, features and principles described in the patent concept are included in the protection scope of the patent.

Claims

1. A non-contact, constant-pressure elastic bonding eddy current detection device, comprising a detection device housing, an eddy current detection probe, and an eddy current detection sensor disposed within the eddy current detection probe, characterized in that... It also includes a spring-loaded device, which is composed of several magnets with opposite poles, and the magnets are slidably disposed at the upper end of the vertical transmission rod of the flow detection probe; The magnets with opposite poles are arranged in a horizontally parallel configuration. A first magnet, located away from the detection surface, is fixed to the top inner surface of the detection device housing. A second magnet, located closer to the detection surface, is fixed to the end face of the vertical transmission rod of the flow detection probe away from the detection surface. The magnets also include a third magnet positioned between the first and second magnets, suspended in the space between them. A balance plate is mounted on the third magnet and is fitted and fixed to its periphery. The first, second, and third magnets are three identical circular annular magnets, with each pair of annular magnets having opposite poles. The eddy current detection probe is slidably mounted on a cylindrical guide shaft located at the end of the vertical transmission rod away from the detection surface of the detection device. The eddy current detection probe also includes an angle adjustment mechanism, which is configured to rotatably connect the vertical transmission rod and the horizontal transmission rod. The horizontal transmission rod is configured to have its center position fixed at the lower end of the vertical transmission rod. The two outer ends of the horizontal transmission rod are respectively equipped with a first eddy current detection sensor and a second eddy current detection sensor. The horizontal transmission rod is configured to consist of two parts: a first horizontal transmission rod and a second horizontal transmission rod. The inner ends of the first horizontal transmission rod and the second horizontal transmission rod are rotatably connected to the lower end of the vertical transmission rod, and the outer ends are respectively connected to the first eddy current detection probe and the second eddy current detection probe.

2. The non-contact elastic constant pressure bonding eddy current detection device according to claim 1, characterized in that... The middle part of the transverse transmission rod is rotatably connected to the end of the vertical transmission rod by a rotating shaft. The spring-loaded device is fixedly installed at the upper end of the vertical transmission rod, and the eddy current detection sensor is fixedly installed at both ends of the transverse transmission rod away from the rotating shaft.

3. The non-contact elastic constant pressure bonding eddy current detection device according to claim 2, characterized in that... The transverse transmission rod also includes a rotating sleeve, which is fixed to one end of the transverse transmission rod near the vertical transmission rod and is integrally and rotatably fixed to the rotating shaft of the vertical transmission rod.

4. The non-contact elastic constant pressure bonding eddy current detection device according to claim 3, characterized in that... The vertical transmission rod has a slot at the end of the rotating shaft. The rotating shaft is fixed in the fixing holes on both sides of the rotating hole in the slot. The horizontal transmission rod is rotatably fixed to the vertical transmission rod through the rotating shaft in the rotating hole of the slot.

5. The eddy current detection device for non-contact elastic constant pressure bonding according to claim 1, characterized in that... A height adjustment device is provided on the side wall of the outer shell of the detection device, which divides the outer shell of the detection device into two sleeve-type height-adjustable parts.

6. A method for detecting non-contact elastic constant pressure bonding, characterized in that... Using the detection device according to any one of claims 1 to 5, the specific steps of the eddy current detection method are as follows: a. Height adjustment of the detection device: The detection probe of the eddy current detection device is placed against the surface of the metal part for scanning and detection. The height of the housing is adjusted by the sleeve-type height adjustment device set in the housing. b. Angle adjustment of the detection device: The angle of the detection sensor is adjusted by the rotary connection structure of the vertical and horizontal transmission rods of the detection probe; c. Actual testing: The eddy current testing device searches and tests, acquires test data, and performs statistical analysis by the testing instrument; d. Repeated scan detection: Repeat the above steps, selectively performing a scan detection from step a or step b.

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