CN209911290U - Eddy current probe real-time follow-up device for flaw detection of steel surface - Google Patents
Eddy current probe real-time follow-up device for flaw detection of steel surface Download PDFInfo
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- CN209911290U CN209911290U CN201920473582.3U CN201920473582U CN209911290U CN 209911290 U CN209911290 U CN 209911290U CN 201920473582 U CN201920473582 U CN 201920473582U CN 209911290 U CN209911290 U CN 209911290U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 67
- 239000010959 steel Substances 0.000 title claims abstract description 67
- 239000000523 sample Substances 0.000 title claims abstract description 65
- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 230000006835 compression Effects 0.000 claims abstract description 25
- 238000007906 compression Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
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Abstract
The utility model relates to a steel surface detects a flaw and uses real-time servo-device of eddy current probe, including the follow-up base plate, follow-up cross roller bearing, action cylinder, follow-up compression spring, locating wheel board, follow-up slide, the follow-up base plate passes through follow-up cross roller bearing and is connected with follow-up slide, and the push rod and the follow-up slide of action cylinder are connected, and the cover is equipped with follow-up compression spring on the push rod of action cylinder, and the locating wheel passes through the locating wheel board and installs on follow-up slide, presses when treating the visit thing surface when the locating wheel, and follow-up compression spring is in the contraction state. The advantages are that: the lift-off clearance between the detection surface of the steel rail bottom array eddy current probe and the detected steel rail bottom plane is ensured to be set at will within the range of 2.0-3.0 mm, and the constant lift-off clearance is ensured in the detection process. Meanwhile, the eddy current probe at the bottom of the steel rail can be ensured to follow the horizontal and vertical positions of the steel rail in real time.
Description
Technical Field
The utility model relates to a rail foot nondestructive test device, in particular to steel is eddy current probe real-time follow-up device for surface flaw detection.
Background
EN13674.4-2006 (Europe standard) and TB/T2344-2012 (iron standard) stipulate that the bottom surface of the full-length rail of the steel rail should be automatically detected. The imported eddy current flaw detection equipment of each steel rail factory in China detects rail bottom surface defects by arranging a plurality of point type probes on a high-speed rotating disc, each point type probe is responsible for scanning a rail bottom fixed area, the point type probes are arranged at different angles, and the situation that when the probes move to corresponding detection areas, longitudinal defects in the detection areas vertically or approximately vertically cut an electromagnetic field generated by the eddy current probes can be ensured, so that eddy current detection signals with high signal-to-noise ratio are obtained. The rail bottom high-speed rotating disc type probe needs to be driven by a motor and a speed reducer in a matching mode, so that the whole weight of the equipment is about 500kg, the dead weight of a probe system is too high, and the probe cannot follow the detected surface of the steel rail in real time. In the detection process, the lift-off gap between the probe and the detected surface is very unstable, the lift-off gap is small, the false alarm rate of the flaw detection system is high, the lift-off gap is large, and the missed alarm rate of the flaw detection system is high. The steel rail eddy current flaw detector composed of the high-speed rotating disc type probe has low detection accuracy, so that domestic imported eddy current flaw detection equipment for climbing steel, clad steel, armed steel, Handover steel and saddle steel cannot be put into actual production detection.
Disclosure of Invention
For overcoming the not enough of prior art, the utility model aims at providing a steel is eddy current probe real-time follow-up device for surface inspection, ensures that eddy current probe keeps treating the real-time follow-up of visiting the thing.
In order to achieve the above object, the utility model discloses a following technical scheme realizes:
the utility model provides a real-time servo-device of eddy current probe for steel surface inspection, includes follow-up base plate, follow-up cross roller bearing, action cylinder, follow-up compression spring, locating wheel board, follow-up slide, follow-up base plate passes through follow-up cross roller bearing and is connected with the follow-up slide, the push rod and the follow-up slide of action cylinder are connected, the cover is equipped with follow-up compression spring on the push rod of action cylinder, the locating wheel passes through the locating wheel board and installs on the follow-up slide, when the locating wheel pressed on treating the surface of expecting the thing, follow-up compression spring was in the contraction state.
The follow-up base plate is fixed on the base.
The follow-up sliding plate is connected with an eddy current probe.
Two groups of follow-up crossed roller bearings are arranged on the follow-up base plate.
The servo device comprises two servo devices, wherein a servo base plate of one servo device is connected with a servo sliding plate of the other servo device.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses can be used to drive the smooth detection of eddy current probe in an orientation, ensure the follow-up operation of eddy current probe in this orientation. When the two devices are matched for use, the lifting clearance between the detection surface of the eddy current probe at the rail bottom of the steel rail and the plane of the rail bottom of the detected steel rail can be set at will within the range of 2.0-3.0 mm, and the lifting clearance is ensured to be constant in the detection process. Meanwhile, the eddy current probe at the bottom of the steel rail can be ensured to follow the horizontal and vertical positions of the steel rail in real time. After 30 dynamic tests of the eddy current sample rail, the alarm leakage rate of all longitudinal and transverse artificial defects is zero, and the false alarm rate is less than or equal to 3%. In the actual production detection, the multi-directional sensitive eddy current probe is distributed in the width area of the rail bottom, so that various defects generated by actual metallurgy and rolling in all directions of the surface of the rail bottom of the steel rail can be effectively detected.
Drawings
Fig. 1 is a front view of the embodiment.
Fig. 2 is a side view of the embodiment.
Fig. 3 is a schematic structural diagram of the present invention.
In the figure: 1-horizontal action cylinder 2-horizontal follow-up compression spring 3-horizontal follow-up sliding plate 4-horizontal follow-up base plate 5-horizontal follow-up crossed roller bearing 6-horizontal positioning wheel plate 7-probe horizontal position positioning wheel 8-steel rail 9-steel rail bottom eddy current probe 10-vertical follow-up sliding plate 11-vertical follow-up base plate 12-vertical follow-up compression spring 13-vertical action cylinder 14-cross beam 15-probe connecting plate 16-base 17-gap positioning wheel 18-vertical follow-up crossed roller bearing
21-action cylinder 22-follow-up compression spring 23-follow-up sliding plate 24-follow-up base plate 25-follow-up crossed roller bearing 26-positioning wheel plate 27-positioning wheel.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments.
Referring to fig. 3, the eddy current probe real-time follow-up device for steel surface flaw detection comprises a follow-up base plate 24, a follow-up cross roller bearing 25, an action cylinder 21, a follow-up compression spring 22, a positioning wheel 27 plate 26 and a follow-up sliding plate 23, wherein the follow-up base plate 24 is connected with the follow-up sliding plate 23 through the follow-up cross roller bearing 25, a push rod of the action cylinder 21 is connected with the follow-up sliding plate 23, the follow-up compression spring 22 is sleeved on the push rod of the action cylinder 21, the positioning wheel 27 is installed on the follow-up sliding plate 23 through the positioning wheel 27 plate 26, and when the positioning wheel 27 is pressed on the surface of an object to be detected, the follow-up.
Wherein the follower base plate 24 is fixed to the base. The follow-up sliding plate 23 is connected with an eddy current probe. Two groups of follow-up crossed roller bearings 25 are arranged on the follow-up base plate 24.
Examples
Referring to fig. 1 and 2, when the bottom surface of the steel rail is detected, two follow-up devices are adopted to drive the eddy current probe, and the eddy current probe is respectively driven in the horizontal direction and the vertical direction, and the specific structure comprises a base 16, a horizontal real-time follow-up device and a vertical real-time follow-up device, wherein the rail bottom eddy current horizontal real-time follow-up device drives a rail bottom eddy current probe 9 of the steel rail to move along with the rail web of the steel rail 8 in the horizontal direction, and the vertical real-time follow-up device drives the rail bottom eddy current probe 9 of the steel rail to move along.
The horizontal real-time follow-up device comprises a horizontal follow-up base plate 4, a horizontal follow-up cross roller bearing 5, a horizontal action cylinder 1, a horizontal follow-up compression spring 2, a probe horizontal position positioning wheel 7, a horizontal positioning wheel plate 6 and a horizontal follow-up sliding plate 3, wherein the horizontal follow-up base plate 4 is arranged on a base 16, the horizontal follow-up base plate 4 is connected with the horizontal follow-up sliding plate 3 through the horizontal follow-up cross roller bearing 5, a push rod of the horizontal action cylinder 1 is connected with the horizontal follow-up sliding plate 3, the horizontal follow-up compression spring 2 is sleeved on the push rod of the horizontal action cylinder 1, the probe horizontal position positioning wheel 7 is arranged on the horizontal follow-up sliding plate 3 through the horizontal positioning wheel plate 6, and when the probe horizontal position positioning wheel 7 is pressed on the waist side face of a steel rail 8; two groups of horizontal follow-up crossed roller bearings 5 are arranged on the horizontal follow-up base plate 4 to balance the sliding friction force of the gap positioning wheel 17 reacting on the two groups of bearings during flaw detection, so that the horizontal follow-up sliding plate 3 is ensured to run stably without shaking, and the detection accuracy is improved.
The vertical real-time follow-up device comprises a vertical follow-up base plate 11, a vertical follow-up sliding plate 10, a vertical follow-up crossed roller bearing 18, a vertical acting cylinder 13, a vertical follow-up compression spring 12 and a gap positioning wheel 17, wherein the vertical follow-up base plate 11 is connected with the horizontal follow-up sliding plate 3, the vertical follow-up base plate 11 is connected with the vertical follow-up sliding plate 10 through the vertical follow-up crossed roller bearing 18, a push rod of the vertical acting cylinder 13 is connected with the vertical follow-up sliding plate 10, the vertical follow-up compression spring 12 is sleeved on the push rod of the vertical acting cylinder 13, the gap positioning wheel 17 and a rail bottom eddy current probe 9 are both fixed on the vertical follow-up sliding plate 10 through a probe connecting plate 15, when the gap positioning wheel 17 abuts against the bottom surface of a rail 8, the vertical follow-up compression spring 12 is in a contraction state, and the rail bottom. Two groups of vertical follow-up crossed roller bearings 18 are arranged on the vertical follow-up base plate 11.
Referring to fig. 1 and 2, a method for using an eddy current probe real-time follow-up device for flaw detection of a steel surface comprises the following steps:
1) fixing the real-time follow-up detection device on the cross beam 14, namely fixing the base 16 on the cross beam 14 through bolts;
2) when the steel rail 8 enters an eddy current detection area, a push rod of the horizontal action cylinder 1 extends out to push the horizontal follow-up sliding plate 3 to move towards the steel rail 8, the probe horizontal position positioning wheel 7 is pressed against the side surface of the rail web of the steel rail 8, and the horizontal follow-up compression spring 2 is compressed at the moment; when the steel rail 8 is far away from the probe horizontal position positioning wheel 7 in the horizontal direction, the horizontal follow-up compression spring 2 pushes the probe horizontal position positioning wheel 7 in real time under the pushing of the elastic restoring force of the horizontal follow-up compression spring, so that the probe horizontal position positioning wheel is ensured to continuously cling to the side surface of the rail web of the steel rail 8 in real time; when the steel rail 8 moves to the probe horizontal position positioning wheel 7 in the horizontal direction, the horizontal follow-up compression spring 2 is further compressed, and the probe horizontal position positioning wheel 7 is ensured to cling to the side face of the rail web of the steel rail 8 in real time;
the horizontal follow-up sliding plate 3 is connected with a horizontal position positioning wheel and a steel rail bottom eddy current probe 9 connected through a vertical follow-up sliding plate 10, so that the relative positions of the horizontal position positioning wheel and the steel rail bottom eddy current probe 9 are fixed, the probe horizontal position positioning wheel 7 and the rail waist side surface of the steel rail 8 are ensured to be tracked and follow in real time, and the position of the steel rail bottom eddy current probe 9 in the horizontal direction relative to a rail bottom detection area is also ensured to be unchanged, so that the detected area of the rail bottom plane of the steel rail 8 is positioned in the central area of the effective detection area of the steel rail bottom eddy current probe of the steel rail 8, and the rail bottom plane detection area;
3) when the device is debugged before production, the gap between the detection surface of the rail bottom eddy current probe 9 of the steel rail and the detected surface of the rail bottom of the steel rail 8 is set to be 2.0-3.0 mm by adjusting the vertical position of the gap positioning wheel 17, and the gap is locked, when the steel rail 8 enters a vortex detection area, a push rod of the vertical follow-up cylinder extends out to push a sliding plate of the vertical follow-up sliding block to move upwards, the gap positioning wheel 17 is pressed against the rail bottom of the steel rail 8, when the steel rail 8 jumps upwards, the gap positioning wheel 17 and the rail bottom eddy current probe 9 of the steel rail move upwards in real time under the action of the elastic restoring force of the vertical follow-up compression spring 12, and the gap positioning wheel; when the steel rail 8 moves downwards, the vertical follow-up compression spring 12 is further compressed under the action of downward pressure of the gap positioning wheel 17 and the steel rail bottom eddy current probe 9, the gap positioning wheel 17, the steel rail bottom eddy current probe 9 and the vertical follow-up sliding plate 10 move downwards simultaneously in real time, and the gap positioning wheel 17 is ensured to be attached to and follow the bottom surface of the steel rail 8 in real time.
Therefore, no matter the steel rail 8 moves or suddenly jumps in the horizontal direction and the vertical direction, the steel rail bottom eddy current probe 9 can realize the real-time tracking of the position of the steel rail 8 by the probe horizontal and vertical real-time follow-up mechanisms. When the horizontal follow-up sliding plate 3 and the vertical follow-up sliding plate 10 are in production detection, the horizontal position positioning wheel 7 and the gap positioning wheel 17 of the probes on the horizontal follow-up sliding plate roll on the corresponding working surface of the steel rail 8, so that the horizontal position positioning wheel and the gap positioning wheel are subjected to the action of rolling friction force in the direction opposite to the moving direction, and the rolling friction force in the direction opposite to the moving direction of the steel rail 8 acts on the horizontal follow-up cross roller bearing 5 and the vertical follow-up cross roller bearing 18 through the horizontal follow-up sliding plate 3 and the vertical follow-up sliding plate 10.
Claims (5)
1. The eddy current probe real-time follow-up device for steel surface flaw detection is characterized by comprising a follow-up base plate, a follow-up cross roller bearing, an action cylinder, a follow-up compression spring, a positioning wheel plate and a follow-up sliding plate, wherein the follow-up base plate is connected with the follow-up sliding plate through the follow-up cross roller bearing, a push rod of the action cylinder is connected with the follow-up sliding plate, the follow-up compression spring is sleeved on the push rod of the action cylinder, the positioning wheel is installed on the follow-up sliding plate through the positioning wheel plate, and when the positioning wheel is pressed on the surface of an object to be detected, the follow-up compression spring is in a.
2. The eddy current probe real-time follow-up device for flaw detection of the surface of steel according to claim 1, wherein the follow-up base plate is fixed on the base.
3. The eddy current probe real-time follow-up device for flaw detection of the surface of steel according to claim 1, wherein the follow-up sliding plate is connected with the eddy current probe.
4. The eddy current probe real-time follow-up device for flaw detection of the surface of steel according to claim 1, wherein two sets of follow-up crossed roller bearings are arranged on the follow-up base plate.
5. The eddy current probe real-time follow-up device for flaw detection of the surface of steel according to claim 1, wherein the follow-up devices are two, and the follow-up base plate of one follow-up device is connected with the follow-up sliding plate of the other follow-up device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920473582.3U CN209911290U (en) | 2019-04-09 | 2019-04-09 | Eddy current probe real-time follow-up device for flaw detection of steel surface |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920473582.3U CN209911290U (en) | 2019-04-09 | 2019-04-09 | Eddy current probe real-time follow-up device for flaw detection of steel surface |
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| CN209911290U true CN209911290U (en) | 2020-01-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521671A (en) * | 2020-05-19 | 2020-08-11 | 华中科技大学 | Eddy current flaw detection method and device for surface cracks of steel rail |
| CN111521688A (en) * | 2020-05-29 | 2020-08-11 | 鞍钢股份有限公司 | Square steel combination formula probe landing gear |
| CN112849209A (en) * | 2021-01-11 | 2021-05-28 | 重庆交通职业学院 | Rail transit operation and maintenance device |
-
2019
- 2019-04-09 CN CN201920473582.3U patent/CN209911290U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521671A (en) * | 2020-05-19 | 2020-08-11 | 华中科技大学 | Eddy current flaw detection method and device for surface cracks of steel rail |
| CN111521688A (en) * | 2020-05-29 | 2020-08-11 | 鞍钢股份有限公司 | Square steel combination formula probe landing gear |
| CN112849209A (en) * | 2021-01-11 | 2021-05-28 | 重庆交通职业学院 | Rail transit operation and maintenance device |
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