CN109823363B - Autorotation train wheel pair flaw detection device - Google Patents
Autorotation train wheel pair flaw detection device Download PDFInfo
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- CN109823363B CN109823363B CN201711181847.4A CN201711181847A CN109823363B CN 109823363 B CN109823363 B CN 109823363B CN 201711181847 A CN201711181847 A CN 201711181847A CN 109823363 B CN109823363 B CN 109823363B
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Abstract
The invention discloses a flaw detection device for autorotation train wheel pairs, wherein a jacking device jacks the whole device from a trench to above the ground; the telescopic shafts can extend out of two sides of the frame and can be positioned at a specific length; the telescopic shaft is provided with a telescopic wheel, the telescopic wheel on the telescopic shaft moves on a narrower equipment running rail in the trench and rises to the ground, and the telescopic shaft moves on a train track; when the autorotation train wheel set flaw detection device moves to a level crossing and then is separated from a train track, the ground running device arranged at the bottom of the frame drives the flaw detection device to move; the wheels of the train are supported by the rotating rollers, and the rotating rollers drive the wheels to rotate when rotating, so that the wheels are separated from the track and rotate for detection by the detection device; by adopting the flaw detection device provided by the invention, the above and descending processes can be automatically completed, the process of entering a trench or ascending from the trench to the ground is completed, and the process of entering and exiting the trench does not need auxiliary tools for hoisting or lifting, so that the flaw detection device can meet the detection requirements of a plurality of trenches.
Description
Technical Field
The invention relates to the technical field of train detection equipment, in particular to a flaw detection device for autorotation train wheel pairs.
Background
The flaw detection of the train wheels is an important link for guaranteeing the safe operation of the train, the traditional flaw detection method needs manual operation of workers, namely, the wheels are not moved, the radial defects of the rims are detected by adopting a transverse wave ultrasonic scanning mode manually, the flaw detection process is often completed by matching a plurality of people, the whole wheels can be basically scanned only by pulling the train for 2-3 times, the problem of missed detection is difficult to avoid, and the manual detection quantity is large.
At present, flaw detection equipment for automatically detecting wheel defects needs to detect train wheels in a trench, one set of equipment can only move in one trench for flaw detection, if the trains parked on other trenches in a maintenance warehouse need to be subjected to flaw detection, the flaw detection equipment needs to be transported to other trenches for flaw detection operation, the operation efficiency is low, multiple working types of coordination operation in the maintenance warehouse are involved, the cost is high, and potential safety hazards also exist.
Disclosure of Invention
The core of the invention is to provide a self-rotating train wheel pair flaw detection device which can automatically enter a trench or be lifted to the ground from the trench, so that the self-rotating operation of the flaw detection device in a plurality of trenches is realized, other auxiliary tools are not needed, the occupied space is reduced, and the improved operation efficiency is realized, and the specific scheme is as follows:
an autorotation train wheel set inspection device comprising:
a frame;
the jacking device is fixed on the frame and can vertically lift downwards so as to jack the frame upwards;
the telescopic shafts are horizontally arranged on the stand in a telescopic manner, can extend out of two sides of the stand and can be positioned at a specific length; the telescopic shaft is provided with a telescopic wheel, and the driving device drives the telescopic shaft to rotate so as to drive the telescopic wheel to roll on the track;
the ground traveling device is arranged at the bottom of the frame and comprises a driving motor and a driving wheel, and the driving motor drives the driving wheel to horizontally run;
the top rotating wheel device comprises a top rotating wheel which can vertically move up and down and can extend out of the rack upwards; the top rotating wheel comprises two groups, each group is provided with two rotating rollers which are arranged in parallel, the wheels of the train are supported by the rotating rollers, and the rotating rollers drive the wheels to rotate when rotating;
the detection device is arranged on the frame and can detect wheels jacked by the top rotating wheel device.
Optionally, the jacking device includes the flexible jar that can stretch out downwards, the both ends of frame respectively set up two flexible jar, two of same one end flexible end connection synchronizing lever of flexible jar makes two of same one end flexible jar goes up and down in step.
Optionally, two ends of the synchronizing rod are respectively provided with a jacking roller, and the distance between the two jacking rollers is equal to the width of the equipment walking rail in the trench.
Optionally, the ground travelling device further comprises a universal wheel arranged in parallel with the rotation shaft of the driving wheel.
Optionally, the ground running device further comprises an anti-tilting roller arranged at the bottom, the distance between the anti-tilting rollers at two sides is larger than the distance between the driving wheels at two sides and the distance between the universal wheels at two sides, and the bottom height of the anti-tilting roller is higher than the distance between the driving wheels and the universal wheels.
Optionally, a lifting device for driving the ground travelling device to retract into the frame or extend out of the bottom of the frame is arranged at the top of the ground travelling device.
Optionally, the lifting device comprises a lifting motor, a screw rod and a chain wheel, wherein the lifting motor is arranged at the top of the ground travelling device, the screw rod is upwards arranged at the top of the ground travelling device in a protruding mode, the inner wall of the chain wheel is in threaded fit with the screw rod, and the lifting motor drives the chain wheel to rotate through a chain; the sprocket drives the wheel cover to move up and down, and the wheel cover is fixed at the bottom of the frame.
Optionally, the device further comprises a calibration block arranged on the frame, wherein the calibration block is in a sector shape, and a defect sample is preset on the calibration block; the detection device can detect the defect sample on the calibration block.
The invention provides a flaw detection device for autorotation train wheel pairs, which comprises a frame, a jacking device, a telescopic shaft, a ground running device, a top rotating wheel device, a detection device and the like, wherein the frame is of a main body structure and plays a limiting role, and other parts are arranged on the frame; the jacking device is fixed on the frame, the telescopic end of the jacking device can vertically lift downwards so as to jack the frame upwards, and the whole device can be jacked from a trench to above the ground through the jacking device; the telescopic shafts are horizontally telescopic and arranged on the frame, can extend out of two sides of the frame and can be positioned at a specific length; the telescopic shaft is provided with telescopic wheels which can roll on the tracks, the telescopic wheels on the telescopic shaft move on narrower tracks in the trench, and after the telescopic wheels rise above the ground, the telescopic shafts extend out from two sides of the telescopic shaft and are matched with the tracks at the inner side distance of the tracks of the trains on the ground to move on the tracks of the trains; when the autorotation train wheel pair flaw detection device moves to a level crossing and then breaks away from the track, the ground running device arranged at the bottom of the frame drives the ground running device to move, the ground running device comprises a driving motor and a driving wheel, the driving motor drives the driving wheel to horizontally run, and the ground running device is driven to move on the ground, so that the whole autorotation train wheel pair flaw detection device is driven to walk; the top rotating wheel device comprises a top rotating wheel which can vertically move up and down and can extend out of the stand upwards, the top rotating wheel comprises two groups, each group is provided with two parallel rotating rollers, the wheel tread of the train is supported by the rotating rollers, the rotating rollers drive wheels to rotate when rotating, and the top rotating wheel lifts the train upwards to enable the wheels to be separated from the track and enable the wheels to rotate for detection by the detection device; the detection device is arranged on the frame, can detect the wheel jacked up by the top rotating wheel device, is opposite to the wheel and detects the whole circumferential structure of the wheel when the wheel rotates.
The autorotation train wheel set flaw detection device provided by the invention can automatically complete the above and descending processes, and complete the process of entering a trench or ascending from the trench to the ground, and the process of entering and exiting the trench does not need auxiliary tools for hoisting or lifting, so that the detection efficiency is accelerated.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram showing an axial structure of a specific construction of a self-rotating train wheel set inspection apparatus of the present invention;
FIG. 2 is a front view showing a specific construction of a flaw detection device for a pair of self-rotating train wheels according to the present invention;
FIG. 3 is a bottom view of the inspection apparatus for a pair of self-rotating train wheels according to the present invention;
FIG. 4A is an axial view of a ground engaging apparatus according to the present invention;
FIG. 4B is a schematic view of another embodiment of the ground engaging apparatus according to the present invention;
FIG. 4C is a diagram illustrating a third angle of the ground engaging apparatus according to the present invention;
FIG. 4D is a diagram illustrating a fourth angular axis of the ground engaging apparatus according to the present invention;
FIG. 5 is an isometric view of a jacking device and its adjacent structure;
fig. 6 is a structural view of the screw, the sprocket and the wheel cover engaged with each other.
The drawings include:
the device comprises a frame 1, a jacking device 2, a telescopic cylinder 21, a synchronous rod 22, a jacking roller 23, a telescopic shaft 3, a telescopic wheel 31, a ground travelling device 4, a driving motor 41, a driving wheel 42, a universal wheel 43, an anti-tilting roller 44, a lifting motor 45, a screw rod 451, a chain wheel 452, a wheel cover 453, a jacking rotating wheel device 5, a jacking rotating wheel 51, a detection device 6 and a calibration block 7.
Detailed Description
The core of the invention is to provide a self-rotating train wheel pair flaw detection device which can be self-rotated among parallel trenches in a detection warehouse, does not need other auxiliary tools, reduces space occupation and improves operation efficiency.
In order to make those skilled in the art better understand the technical scheme of the present invention, the following describes the inspection device of the self-rotating train wheel pair of the present invention in detail with reference to the accompanying drawings and the specific embodiments.
As shown in fig. 1, which is a structural axial structure diagram of a specific structure of the inspection device of the self-rotating train wheel set of the present invention, fig. 2 is a front view of a specific structure of the inspection device of the self-rotating train wheel set of the present invention; the autorotation train wheel set flaw detection device comprises a frame 1, a jacking device 2, a telescopic shaft 3, a ground running device 4, a top rotating wheel device 5, a detection device 6 and other structures, wherein the frame 1 is of a cuboid frame structure and is formed by mutually fixing a plurality of rods and plates, other parts are arranged on the frame and play a role in positioning and fixing the parts, and the specific shape structure of the frame 1 is not particularly limited as long as the frame can be used for bearing; the fixed part of the jacking device 2 is fixed on the frame 1, the telescopic end can vertically lift downwards, and the telescopic end can contact the ground or the track after extending downwards so as to jack the frame 1 upwards. The jacking device 2 can adopt a driving structure such as a hydraulic cylinder, and the like, as long as the structure of vertical extension and retraction can be realized.
The telescopic shaft 3 is horizontally arranged on the frame 1 in a telescopic manner, and the telescopic shaft 3 can extend out of two sides of the frame 1 and can be positioned at a specific length; the end of the telescopic shaft 3 is provided with a telescopic wheel 31, the telescopic wheel 31 can roll on a track, the telescopic shaft 3 is provided with the telescopic wheel 31, and the driving device drives the telescopic shaft 3 to rotate so as to drive the telescopic wheel 31 to roll on the track. As shown in fig. 3, in the bottom view of the inspection device for the autorotation train wheel set in the invention, two telescopic shafts 3 extend from two sides of the frame 1, one end of the telescopic shaft 3, which is located at the frame 1, can realize axial expansion and contraction through a structure such as a screw rod, the telescopic shaft 3 is driven to rotate by a power device, so that the telescopic wheels 31 rotate on a track, and the whole inspection device for the autorotation train wheel set runs along the track. In the trench, the distance between the telescopic wheels 31 at the two sides is matched with a narrower track in the trench, and the vehicle walks in the trench; on the ground, the distance between the telescopic wheels 31 on both sides is matched with the normal track width, and the telescopic wheels move on the normal track on the ground. The process of entering and exiting from the trench is realized by the expansion and contraction of the jacking device 2, and the distance between the expansion wheels 31 at the two sides is adapted to the state of the autorotation train wheel pair flaw detection device.
The ground device 4 is arranged at the bottom of the frame 1, the ground device 4 comprises a driving motor 41 and a driving wheel 42, as shown in fig. 4A to 4D, the ground device 4 respectively provides four axial measurement structure diagrams with different angles, which comprise a rectangular frame structure, and other structures are arranged on the frame; the driving motor 41 is arranged at the bottom of the frame, the output shaft is horizontally arranged, the output shaft is connected with the driving wheel 42, the driving wheel 42 is rotationally connected to the rectangular frame and is contacted with the ground, the driving motor 41 can rotate around a horizontal rotating shaft, the driving wheel 42 is driven to rotate by the driving motor 41, and the ground travelling device 4 is driven to horizontally move on the ground; when the rotation directions of the two driving motors are the same as the rotation speeds, the ground running device 4 is driven to move along a straight line, and when the two driving motors 41 have the rotation speed difference, the ground running device 4 turns, so that the whole autorotation train wheel pair flaw detection device directly moves or turns. Of course, in addition to controlling rotation by differential rotation, steering wheels 42 may be provided separately or may be turned to control the direction of movement, and such specific arrangements are intended to be within the scope of the present invention.
The top rotating wheel device 5 comprises a top rotating wheel 51 which can vertically move up and down and can extend upwards out of the frame 1; the top rotating wheel 51 comprises two groups, each group is provided with two rotating rollers which are arranged in parallel, the wheels of the train are supported by the rotating rollers, the rim is the side surface of the wheels, which is contacted with the track, and the rotating rollers drive the wheels to rotate when rotating; when in detection, the autorotation train wheel set flaw detection device is positioned at the bottom of a trench, so that the top rotating wheels 51 are aligned with the wheels, two top rotating wheels 51 are corresponding to the lower part of each wheel, the rims of the wheels are contacted with the top rotating wheels 51, and a lifting force is provided for a train; before detection, the top rotating wheel is positioned below the wheels, and rises synchronously under the action of the driving device until the top rotating wheel contacts with the rims of the wheels, and continuously rises upwards, the whole train is lifted upwards by the top rotating wheel 51, the top rotating wheel rotates after the top rotating wheel is lifted, and the wheels rotate through friction force between the top rotating wheel and the wheels.
The detection device 6 is arranged on the frame 1 and can detect the wheels jacked by the top rotating wheel device 5; the detection device 6 is aligned with a part of the wheel circumference, and detects the entire wheel during the rotation of the wheel. The flaw detection device for the autorotation train wheel set further comprises a control device for controlling the working time of each component, and the control parts refer to the prior art, so that the invention is not repeated here.
By adopting the autorotation train wheel set flaw detection device provided by the invention, the vertical lifting between the trench and the ground is realized through the jacking device 2; the horizontal extension and retraction of the extension shaft 3 is matched with the tracks with different gauges so as to move in the track on the trench or the ground; when the device moves to a level crossing, the device enters the level ground from the track, and the device is driven to walk and turn through the ground travelling device 4 on the ground to move into the next detection trench. The device does not need to adopt extra auxiliary hoisting tools, can realize walking transportation through the structure of the device, and is matched with a remote controller to carry out manual control walking, or is assembled with various sensors, and the detection surrounding environment realizes full-automatic operation, so that the problem of operation among multiple channels of the same flaw detection equipment is solved, the problem that one detection equipment is arranged on each or two channels is reduced, the detection efficiency is improved, the labor intensity is reduced, and meanwhile, the equipment configuration cost is saved.
The equipment is provided with a drag chain mechanism, water, electricity and air sources can be connected into the equipment, the equipment can be plugged manually only, and messy wires, water pipes and the like can not be generated in a trench.
On the basis of the scheme, the jacking device 2 comprises a telescopic cylinder 21 which can extend downwards, as shown in fig. 5, an isometric view of the jacking device 2 and an adjacent structure thereof is shown, and the direction shown in fig. 5 is the bottom of the device; two telescopic cylinders 21 are respectively arranged at two ends of the frame 1, one end of the telescopic cylinders 21 is shown in fig. 5, the telescopic ends of the two telescopic cylinders 21 at the same end are connected with a synchronous rod 22, and the synchronous rod is horizontally arranged, so that the two telescopic cylinders 21 at the same end can be synchronously lifted, and the problem of inclination is avoided.
Further, two ends of the synchronizing rod 22 are respectively provided with a top extension roller 23, and the distance between the two top extension rollers 23 is equal to the width of the equipment running rail in the trench; the interval between two top stretching rollers 23 is kept fixed, and the top stretching rollers 23 are propped against the equipment running rail, so that the problem of inclination caused by uneven bottom of a trench can be avoided, and the whole device can be lifted more stably.
The ground traveling device 4 further comprises universal wheels 43 arranged in parallel with the rotation shaft of the driving wheels 42, in the invention, the driving wheels 42 and the universal wheels 43 are arranged in a row aligned, as shown in fig. 3, the two driving wheels 42 are positioned in the same horizontal row, each driving wheel 42 corresponds to the two universal wheels 43 arranged in the vertical row, the universal wheels 43 play a role of stabilization, and the universal wheels 43 arranged in the same row with the corresponding driving wheels 42 can keep synchronous operation with the corresponding driving wheels through a transmission chain. Instead of the universal wheel 43, other arrangements may be used, such as a rubber wheel, etc., and the ground engaging device 4 should be ground contacted by at least four wheels, only two driving wheels are provided in the present invention, and all wheels may be provided as driving wheels, which are included in the scope of the present invention.
The ground engaging device 4 further includes an anti-tilting roller 44 disposed at the bottom, the anti-tilting roller 44 being disposed outside the driving wheel 42 and the universal wheel 43, here with respect to the portion between the driving wheel 42 and the universal wheel 43 as the inside; the pitch of the anti-roll 44 on both sides is larger than the pitch of the driving wheel 42 on both sides and the pitch of the universal wheel 43 on both sides, and the bottom of the anti-roll 44 is higher than the driving wheel 42 and the universal wheel 43. During normal walking, the driving wheel 42 and the universal wheel 43 are simultaneously contacted with the ground, and during the instability phenomenon, the anti-tilting roller 44 is contacted with the ground, so that further tilting is avoided, and the auxiliary stabilization effect is realized.
On the basis of any one of the technical schemes and the combination thereof, the invention arranges a lifting device which drives the ground traveling device 4 to retract into the frame 1 or extend out of the bottom of the frame 1 on the top of the ground traveling device 4; when the device moves on the track through the telescopic wheels, the ground travelling device is kept retracted into the frame 1, so that the device is prevented from being blocked from normal movement; when the floor is required to move on the ground, the floor travelling device 4 is required to extend downwards and is driven to travel by virtue of the floor travelling device.
The invention provides a concrete structure for lifting a ground traveling device, wherein the lifting device comprises a lifting motor 45, a screw rod 451 and a chain wheel 452, wherein the lifting motor 45 is arranged at the top of a frame of the ground traveling device 4, the screw rod 451 is arranged at the top of the frame of the ground traveling device 4 in an upward protruding mode, the inner wall of the chain wheel 452 is in threaded fit with the screw rod 451, the lifting motor 45 drives the chain wheel 452 to rotate through a chain, the length of the screw rod 451 is further changed, the extending and retracting of the ground traveling device 4 are achieved, and the chain structure is not marked in the drawing. The outside of sprocket 452 is overlapped and is equipped with wheel casing 453, and sprocket 452 can rotate for wheel casing 453, and wheel casing 453 keeps synchronous vertical movement with sprocket 452, and wheel casing 453 reciprocates by sprocket 452 drive, and wheel casing 453 is fixed in the bottom of frame 1. As shown in fig. 6, the structure diagram of the mutual cooperation of the screw rod 451, the sprocket 452 and the wheel cover 453 is that the lower part of the screw rod 451 can be directly fixed on the ground running device 4, or as shown in the figure, the bottom of the screw rod 451 is provided with a square head bolt, the square head bolt is sleeved in a limit groove, the limit groove and the ground running device 4 are kept fixed, and the limit screw rod 451 is kept fixed.
The invention also comprises a calibration block 7 which is arranged on the frame 1 and can be self-transported, wherein the calibration block 7 is in a sector shape, which is equivalent to cutting a part on a complete wheel, and a defect sample is preset on the calibration block 7; the detection device 6 can detect the defect sample on the calibration block 7, before detecting the wheels of the train, the calibration block 7 is detected, all the preset defect samples on the calibration block 7 are detected to perform subsequent detection, otherwise, the detection device 6 is considered to have problems, and the accuracy of the result cannot be ensured; after the detection of the wheels is finished, the calibration block 7 is required to be detected again, and the accuracy and reliability of detection data between the two calibration block detections are ensured.
Preferably, the calibration block 7 is rotatably arranged on the frame 1, and the rotation axis of the calibration block 7 coincides with the circle center of the calibration block; set up the telescopic link between frame 1 and the demarcation piece 7, the one end rotation of telescopic link is connected frame 1, and the other end rotates and connects demarcation piece 7, and the telescopic link drives demarcation piece 7 through the flexible rotation to make detection device 6 can detect all defect samples. Besides driving the calibration block 7 to swing through the telescopic rod, the motor and the gear can be matched to drive the calibration block, and the specific arrangement modes are included in the protection scope of the invention. In addition, the above scheme is that the calibration block 7 moves in an arc, the detection device 6 is kept still, or the calibration block 7 can be fixed, so that the detection device 6 moves for detection.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. An autorotation train wheel set inspection device, comprising:
a frame (1);
the jacking device (2) is fixed on the frame (1) and can vertically lift downwards so as to jack the frame (1) upwards;
the telescopic shafts (3) are horizontally arranged on the frame (1) in a telescopic manner, and the telescopic shafts (3) can extend out of two sides of the frame (1) and can be positioned; the telescopic shaft (3) is provided with a telescopic wheel (31), and the driving device drives the telescopic shaft (3) to rotate so as to drive the telescopic wheel (31) to roll on a track;
the ground traveling device (4) is arranged at the bottom of the frame (1) and comprises a driving motor (41) and a driving wheel (42), and the driving motor (41) drives the driving wheel (42) to horizontally run;
the top rotating wheel device (5) comprises a top rotating wheel (51) which can vertically move up and down and can extend out of the frame (1) upwards; the top rotating wheel (51) comprises two groups, each group is provided with two rotating rollers which are arranged in parallel, the wheels of the train are supported by the rotating rollers, and the rotating rollers drive the wheels to rotate when rotating;
the detection device (6) is arranged on the frame (1) and can detect wheels jacked by the top rotating wheel device (5); the jacking device (2) comprises telescopic cylinders (21) which can extend downwards, two ends of the frame (1) are respectively provided with two telescopic cylinders (21), and telescopic ends of the two telescopic cylinders (21) at the same end are connected with a synchronous rod (22) so that the two telescopic cylinders (21) at the same end can synchronously lift;
the two ends of the synchronizing rod (22) are respectively provided with a jacking roller (23), and the distance between the two jacking rollers (23) is equal to the width of a running rail of equipment in a trench;
the ground travelling device (4) further comprises a universal wheel (43) which is arranged in parallel with the rotating shaft of the driving wheel (42);
the ground travelling device (4) further comprises an anti-tilting roller (44) arranged at the bottom, the distance between the anti-tilting rollers (44) at two sides is larger than the distance between the driving wheels (42) at two sides and the distance between the universal wheels (43) at two sides, and the bottom height of the anti-tilting roller (44) is higher than the distance between the driving wheels (42) and the universal wheels (43);
the top of the ground traveling device (4) is provided with a lifting device which drives the ground traveling device (4) to retract into the frame (1) or extend out of the bottom of the frame (1).
2. The autorotation train wheel set flaw detection device according to claim 1, wherein the lifting device comprises a lifting motor (45), a screw rod (451) and a chain wheel (452), the lifting motor (45) is arranged at the top of the ground traveling device (4), the screw rod (451) is arranged at the top of the ground traveling device (4) in an upward protruding mode, the inner wall of the chain wheel (452) is in threaded fit with the screw rod (451), and the lifting motor (45) drives the chain wheel (452) to rotate through a chain; the sprocket (452) drives the wheel cover (453) to move up and down, and the wheel cover (453) is fixed at the bottom of the frame (1).
3. The autorotation train wheel set flaw detection device according to claim 2, further comprising a calibration block (7) arranged on the frame (1), wherein the calibration block (7) is fan-shaped and can rotate automatically, and a flaw sample is preset on the calibration block; the detection device (6) is capable of detecting defective samples on the calibration block (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711181847.4A CN109823363B (en) | 2017-11-23 | 2017-11-23 | Autorotation train wheel pair flaw detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711181847.4A CN109823363B (en) | 2017-11-23 | 2017-11-23 | Autorotation train wheel pair flaw detection device |
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| CN109823363A CN109823363A (en) | 2019-05-31 |
| CN109823363B true CN109823363B (en) | 2023-09-15 |
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| CN113418988A (en) * | 2021-07-26 | 2021-09-21 | 西南民族大学 | Train body flaw detection system base |
| CN114216969B (en) * | 2021-12-30 | 2022-10-04 | 连云港市九洲电控设备有限公司 | Automatic ultrasonic flaw detection equipment and method for train wheel shaft |
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| CN109823363A (en) | 2019-05-31 |
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