Array eddy current testing system for inner hole of bullet train hollow shaft

Abstract

The present application relates to the field of hollow shaft detection, and relates to a high-speed rail hollow shaft inner hole array eddy current detection system, which does not need to adopt a shaft hole end adapter and a take-up motor, does not need manual adjustment centering, can realize fast alignment detection and fast take-up, and comprises a moving trolley, a controller, a display and a detection device, the detection device comprises a shell and take-up, push detection, guiding structure, the take-up structure adopts a three-section slide rail type guide groove with variable diameter, the detection probe in the push detection structure is conical and can be replaced by pulling and inserting, the detection line adopts nylon tube packaging, the guiding structure is arranged at the probe outlet end of the shell and is used for guiding the probe into the inner hole of the hollow shaft, the guiding structure can be expanded to adapt to hollow shafts with different structures and sizes, and a laser centering assembly is additionally arranged to realize automatic centering of the detection probe and the inner hole. The present application optimizes the structure and performance of the existing array eddy current detection device, saves production manufacturing cost, and has a simpler overall structure and is easier to operate, and the detection result is accurate and reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the hollow shaft detection technical field, especially to a high-speed rail hollow shaft inner hole array eddy current detection system. BACKGROUND

[0002] The hollow shaft of the motor train unit is a key part of the running part of the motor train, and during the manufacturing, assembling and application of the hollow shaft, scratches, cracks, looseness and deformation may occur on the inner hole surface or inside of the hollow shaft. The existence of these defects will threaten the safe operation of the motor train unit, therefore, the detection of the defects in the inner hole of the hollow shaft is crucial. At present, the inner hole of the hollow shaft of the motor train needs to be regularly or conditionally subjected to non-destructive testing (usually ultrasonic or eddy current detection method) to prevent the defects on the inner hole surface or inside of the hollow shaft from expanding due to fatigue and causing accidents. For the detection of the defects on the inner hole surface of the hollow shaft of the motor train, the array eddy current detection technology has been widely applied due to its advantages of not requiring coupling agent, fast detection speed, high detection sensitivity and good reliability. However, the existing in-service or in-situ array eddy current detection equipment for the inner hole of the hollow shaft of the motor train still has some problems:

[0003] Firstly, the existing array eddy current detection equipment for the inner hole of the hollow shaft needs to be designed and installed with an adapter for guiding the array eddy current sensor into the inner hole and pushing or pulling to complete the non-destructive testing of the inner hole (usually about 2.6m) of the hollow shaft before detection. Since the inner hole sizes of the hollow shaft of the motor train introduced or produced in China today are various and the end structures vary greatly, many types of adapters need to be made, which is extremely inconvenient to use.

[0004] Secondly, the detection line connected with the detection probe of the existing array eddy current detection equipment for the inner hole of the hollow shaft is generally chain type (usually iron chain) with a length of about 6.5 meters, so an automatic take-up device needs to be designed and installed. At present, the automatic take-up device is designed in a motor type, which not only has high cost but also has complex structure, and the take-up needs multi-dimensional cooperation and linkage, which is extremely inconvenient to use and has poor reliability. In addition, the probe detection line of the iron chain type is particularly prone to scratching the inner hole surface of the hollow shaft and causing scratches, resulting in damage to the quality of the inner hole surface of the hollow shaft.

[0005] Thirdly, the butt joint of the detection probe and the hollow shaft of the existing array eddy current detection equipment for the inner hole of the hollow shaft adopts a manual adjustment alignment mode, which has the problem of inconvenient operation and is to some extent dependent on the experience of the operator, so the reliability is not high. Based on the above status, the present application is improved on the basis of the existing technology to solve the above problems. SUMMARY

[0006] In order to solve the problems of the adaptability of multiple sizes of inner holes and the complicated take-up structure of the existing hollow shaft detection device, the application provides a high-speed rail hollow shaft inner hole array eddy current detection system, which does not need to frequently replace the adapter when pushing the detection probe into the inner hole, and does not need to use a take-up motor when winding the detection line, and has the advantages of simple structure, easy operation and high reliability.

[0007] The high-speed rail hollow shaft inner hole array eddy current detection system is used for quickly detecting the inner holes of different sizes of in-service high-speed rail hollow shafts and synchronously taking up the detection line, and does not need to use a shaft hole end adapter and a take-up motor and manually adjust the centering, and comprises a moving trolley and a controller, a display and a detection device loaded on the moving trolley.

[0008] A shell and a push-pull detection structure sequentially linked in the shell.

[0009] A take-up structure, which forms three variable-diameter take-up sections and winds the detection line into a double-loop planar spiral, comprises a support ring rotationally arranged in the first take-up section, a line holding block integrally arranged with the support ring, a plurality of single-side limiting rollers located in the second take-up section and a plurality of double-side limiting rollers located in the third take-up section, and the line holding block is connected to the end of the detection line and pulls the detection line to move along the variable-diameter take-up section to take out or wind up the detection line.

[0010] A push-pull detection structure, which comprises a detection probe, a detection line and a push-pull driving assembly, the detection probe is an array eddy current detection probe, the head of the array eddy current detection probe is conical, the tail is connected to the detection line in a plug-in manner, the detection line is a drag chain cable and is packaged with a nylon tube, and the push-pull driving assembly is used for pushing the array eddy current detection probe and the detection line to the front end of the hollow shaft inner hole or pulling them out to the other end of the hollow shaft inner hole.

[0011] A guide structure, which is arranged at the detection probe outlet end of the shell and is used for guiding the detection probe into the hollow shaft inner hole, comprises a flexible variable-diameter arc-shaped probe guide groove, the probe guide groove is formed by a plurality of arc-shaped plates hinged to each other, the outer periphery of the arc-shaped plates is provided with a pulling assembly, the pulling assembly rotates the arc-shaped plates to expand the probe guide groove to adapt to different sizes of shaft holes, and the end of the probe guide groove is embedded with a laser centering assembly, and the laser centering assembly forms single-point focusing or three-point focusing.

[0012] As a further improvement, the arc-shaped plates comprise an arc-shaped bottom plate and two arc-shaped side plates, the arc-shaped side plates are hingedly arranged on both sides of the arc-shaped bottom plate, and torsional springs or magnetic fasteners are arranged at the hinge portions.

[0013] As a further improvement, the pulling assembly comprises a ring-shaped lug provided on the outer periphery of the arc-shaped side plate, a steel wire rope for pulling is wound on the ring-shaped lug, and a winding and unwinding adjuster of the steel wire rope is provided at the lower end of the arc-shaped bottom plate.

[0014] As a further improvement, the pulling assembly comprises two half-ring clamps respectively fixed on the outer periphery of the arc-shaped side plate, the opening ends of the two half-ring clamps are opposite, and an adjuster screw for adjusting the tightness of the clamps is arranged at the opening end.

[0015] As a further improvement, a plurality of guide wheels are arranged on the outer periphery of the support ring, and the guide wheels are matched with the detection line.

[0016] As a further improvement, a pair of intermediate partitions are further arranged in the shell, the intermediate partitions clamp the winding structure, and annular grooves matched with the guide wheels on the outer periphery of the support ring are concavely arranged on the intermediate partitions.

[0017] As a further improvement, the probe guide groove is made of plastic steel material.

[0018] Compared with the prior art, the present application can obtain the following technical effects:

[0019] Firstly, the simple winding structure is arranged in the shell to replace the traditional method of winding the detection line by a winding motor, the winding structure comprises a support ring, a wire clamping block and a plurality of limiting rollers, a variable-diameter winding track is formed by ingenious arrangement and design, the detection line disc is wound into a double-loop planar spiral, and the winding effect of the winding structure on the small-length detection line is good; the detection line is connected to the tail of the detection probe, and the wire outlet and the winding are driven with the detection probe. Compared with the traditional operation mode of double motors (push-pull driving motor and winding motor), the possible faults in the double motor linkage working process are avoided, the service life of the device is improved, the production and manufacturing cost of the equipment is greatly saved, the winding operation is convenient, and the reliability of the equipment is stronger.

[0020] Secondly, the detection probe is pushed or pulled out of the inner hole of the hollow shaft by arranging the push-pull detection structure, wherein the detection probe adopts an array eddy current detection probe, the overall volume of the detection probe is small, the weight is light, and the driving pressure of the push-pull driving assembly is reduced; the head of the detection probe is conical, the conical streamline structure reduces the resistance when the head is introduced into the inner hole of the hollow shaft; the tail is connected to the detection line in a plug-in manner, the plug-in type replacement is adopted, when the detection probe is worn or the size specification of the detection probe needs to be replaced, only the detection probe needs to be replaced, and the entire detection equipment does not need to be replaced, which is simple and convenient. The detection line is a drag chain cable and is packaged by a nylon pipe, the nylon pipe enhances the hardness of the detection line pipe, and facilitates winding. At the same time, the nylon pipe has a bidirectional protection effect, on the one hand, the drag chain cable is prevented from being rubbed and broken in the detection process, and on the other hand, the nylon pipe is not easy to cause damage to the inner hole wall of the hollow shaft.

[0021] Thirdly, the application guides the detection probe into the hole of the hollow axle by setting a guide structure, and the guide structure includes a flexible arc-shaped probe guide slot with a variable-diameter flared end for hollow axles with different hole end structures or sizes, the probe guide slot is formed by a plurality of arc-shaped plates hinged to each other, the outer periphery of the arc-shaped plates is provided with a pulling assembly, the pulling assembly pulls the arc-shaped plates to rotate to flared the probe guide slot to adapt to different sizes of the hole of the axle. Further, the end of the probe guide slot is embedded with a laser centering assembly, the laser centering is used without manual adjustment, compared with the traditional structure, the probe guiding effect of the application is better, and the flexible probe guide slot will not damage the hollow axle; the application does not need to add a hole end adapter, greatly reduces the problem of frequent replacement of the adapter during detection, improves the detection efficiency, and reduces the production cost of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the present application or the prior art or the description of the prior art required in the prior art, it is obvious that for those skilled in the art, without creative labor, other drawings can also be obtained according to these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the application.

[0024] Figure 2 It is a reference schematic diagram of the use state of the application.

[0025] Figure 3 It is an exploded schematic diagram of the detection equipment.

[0026] Figure 4 It is a schematic diagram of the internal structure of the detection equipment.

[0027] Figure 5 It is Figure 4 It is a schematic diagram in the front view direction.

[0028] Figure 6 It is a schematic diagram of the intermediate partition plate and part of the take-up assembly of the detection equipment.

[0029] Figure 7 It is a schematic diagram of the guide structure in one embodiment of the application.

[0030] Figure 8 It is a schematic diagram of the guide structure adjusted by the semi-ring type hoop in this embodiment.

[0031] Figure 9 It is a schematic diagram of the guide structure adjusted by the steel wire pulling in this embodiment.

[0032] Figure 10 It is a brief schematic diagram of the variable-diameter principle of the guide structure.

[0033] Fig.:

[0034] 10 - moving trolley;

[0035] 20 - controller;

[0036] 30 - display;

[0037] 40 - detection device,

[0038] 41 - housing,

[0039] 42 - take-up structure, 421 - support ring, 422 - wire holding block, 423 - limit roller, 424 - guide wheel;

[0040] 43 - push detection structure, 431 - detection probe, 432 - push driving assembly, 433 - detection wire;

[0041] 44 - guide structure, 441 - arc-shaped bottom plate, 442 - arc-shaped side plate, 443 - pulling assembly, 443a - ring-shaped hanging ear, 443b - steel wire rope, 443c - take-up and release adjuster, 443d - half-ring type hoop, 443e - adjusting bolt;

[0042] 45 - intermediate partition plate, 451 - annular groove;

[0043] 50 - hollow shaft;

[0044] A - third disc winding section, B - second disc winding section, C - first disc winding section. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0046] In the description of the present application, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0047] The conventional ultrasonic detection for the flaw detection of the hollow shaft center hole adopts the equipment with large overall volume, the probe with large weight, and the detection line with long length, and the hollow shaft inner hole of the motor car has many sizes and different end structures, under the design background, the existing detection device has some problems, one aspect is that the existing detection is generally through the adapter sleeved on the end of the shaft, the detection probe is pushed to the end of the hollow shaft inner hole through the driving motor, and then the detection probe is pushed into the hollow shaft after aligning the adapter, the imported adapter is expensive, different adapters need to be used for different specifications and different structures, so that the detection cost is greatly improved, and in the factory detection, the specifications and sizes are more, the adapter needs to be frequently replaced manually during detection, which affects the detection efficiency, on the other hand, for the setting and winding of the detection line, the existing structure generally reserves more line length, and the winding is carried out by the motor, so that the winding is troublesome, and the reserved line length is more than half of the actual use, and the cost is also higher. Based on the problems existing in the existing device, the present application is improved, and the probe introduction and device winding are improved, so as to optimize the performance, improve the structural reliability, and save the cost.

[0048] Reference drawings Figures 1-10 The application discloses a motor car hollow shaft inner hole array eddy current detection device, which is used for rapidly detecting the in-service motor car hollow shaft inner hole with different sizes and synchronously winding the detection line, and does not need to adopt the shaft hole end adapter and the winding motor. The device can detect the in-service motor car hollow shaft inner hole and can be used for the pre-delivery detection of the hollow shaft. The device comprises a moving trolley 10, a controller 20, a display 30 and a detection equipment 40 loaded on the moving trolley 10. The detection equipment 40 is hung on the moving trolley 10 through a suspension frame. The horizontal and vertical displacements of the detection equipment 40 can be adjusted through an electric control system. The detection equipment 40 comprises a shell 41, a winding structure 42, a detection pushing and pulling structure 43 and a guide structure 44 which are sequentially connected in the shell 41.

[0049] The shell 41, the winding structure 42, the detection pushing and pulling structure 43 and the guide structure 44 which are sequentially connected in the shell 41. The winding structure 42 is used for winding the detection line. The detection pushing and pulling structure 43 is used for driving the detection probe 431 to push or pull out of the hollow shaft 50 inner hole. The guide structure 44 is arranged at the shaft hole end and is used for guiding the detection probe 431 into the hollow shaft 50 inner hole.

[0050] Specific structure is as follows: the winding structure 42 forms three variable-diameter winding sections and winds the detection line 433 into double-loop planar spiral shape, reference drawings Figure 5, the first disc receiving section C is an inner ring section, the first disc receiving section C internally comprises a support ring 421 rotatably arranged at the center of the shell 41, the support ring 421 is integrally provided with a wire holding block 422, wherein the wire holding block 422 is connected to a detection wire 433, the detection wire 433 is arranged around the outer periphery of the support ring 421, in the wire-out process, the detection wire 433 drives the wire holding block 422 and the support ring 421 to rotate clockwise around the center point, the detection wire 433 is wire-out along the track, and in the wire-in process, the wire holding block 422 and the support ring 421 are naturally rotated counterclockwise around the center point. The second disc receiving section B is an outer ring section, the second disc receiving section B internally comprises a plurality of single-side limiting rollers 423, the limiting rollers 423 are arranged outside the detection wire 433 to form a limiting track, and the limiting rollers can assist the wire-in to be smoother. The third disc receiving section A is an adapter section of the outer ring and the wire-out port, and comprises a plurality of double-side limiting rollers 423, the limiting rollers 423 form a clamping track. The detection wire 433 is connected to the tail of the detection probe 431, and is driven to be wire-out or wire-in along the variable-diameter disc receiving path. The wire-in structure 42 of the present application forms a double-ring planar spiral path, the transition between the disc receiving sections is excellent, and the wire-in function is realized by using a simple structure and a clever segmented variable-diameter design.

[0051] The push detection structure 43 is arranged at the lower end of the shell 41, and comprises a detection probe 431 and a push driving assembly 432 (the push driving assembly comprises a motor, a driving wheel, a driven wheel, a conveying belt and the like), the detection probe 431 adopts an array eddy current detection probe, compared with a traditional ultrasonic probe, the array eddy current detection probe has a compact overall structure, a small volume and a light weight, and greatly reduces the driving pressure of the push driving assembly 432, the head of the detection probe 431 is conical, the head with a taper reduces the pushing resistance in the process of pushing the detection probe 431 into the inner hole of the hollow shaft 50, the tail is connected to the detection wire 433 in a plug-in manner, and the plug-in type is replaced, when the detection probe 431 is worn or the probe size specification needs to be replaced, only the probe needs to be replaced, and the entire detection equipment does not need to be replaced, so that the replacement is simple and fast. The detection wire 433 is a drag chain cable and is packaged by a nylon pipe, and the push driving assembly 432 is used for pushing the array eddy current detection probe 431 and the detection wire 433 to the front end of the inner hole of the hollow shaft or pulling out to the other end of the inner hole of the hollow shaft.

[0052] In the embodiment, the length of the detection wire 43 is shortened, and the length of the detection wire is specifically set to be optimized and adjusted according to the size of the shell and the disc wire track, in the embodiment, the detection wire with a length of 6-7 m is adopted, compared with a traditional chain detection, the nylon detection wire of the present application is not easy to cause damage to the inner hole wall of the hollow shaft, the nylon pipe has a certain hardness, and the wire-in is realized in a motor-free manner by cooperating with the winding track.

[0053] The guide structure 44 is arranged at the outlet end of the detection probe 431 of the shell 41, and is used for guiding the detection probe 431 into the inner hole of the hollow axle, and comprises a flexible variable-diameter arc-shaped probe guide groove, wherein the arc-shaped probe guide groove is formed by mutually hinged arc-shaped plates, the outer periphery of the arc-shaped plates is provided with a pulling assembly 443, the pulling assembly 443 pulls the arc-shaped plates to rotate to expand the mouth of the probe guide groove to adapt to the axle holes of different sizes, and the end of the probe guide groove is embedded with a laser centering assembly, the laser centering assembly forms single-point focusing or three-point focusing, and the focusing is more rapid, so that the alignment and perforation are more rapid.

[0054] Different from the conventional ultrasonic detection device, the present application adopts an eddy current detection probe, and has small volume and weight, is easy to be pushed by a driving assembly, and can be quickly pushed into the inner hole of the hollow axle in combination with the probe guide groove. The simple take-up structure further simplifies the structure of the device, so that the device is more lightweight, the structure is reliable, the cost of the equipment is reduced, and multi-dimensional optimization of the device is realized.

[0055] Reference is made to the accompanying drawings Figure 7 In an embodiment, the probe guide groove can be composed of two symmetrical arc-shaped plates, and the mouth of the probe guide groove is expanded by pulling the arc-shaped plates to two sides.

[0056] Reference is made to the accompanying drawings Figure 8 In the embodiment, the arc-shaped plates include an arc-shaped bottom plate 441 and two arc-shaped side plates 442, the arc-shaped bottom plate 441 and the arc-shaped side plates 442 are spliced to form a guide groove with variable opening size, the arc-shaped side plates 442 are hingedly arranged at two sides of the arc-shaped bottom plate 441, the arc-shaped side plates 442 can rotate around the hinge joints, and torsional springs or magnetic attraction fasteners are arranged at the hinge joints, under the action of the torsional springs or the magnetic attraction fasteners, the arc-shaped side plates 442 are inlaid into the guide groove, the splicing joints of the arc-shaped side plates 442 and the arc-shaped bottom plate 441 can be designed as splicing clamping structures for limiting, or the force of the torsional springs or the magnetic attraction fasteners can be balanced through the pulling assembly 443.

[0057] As a further improvement, the pulling assembly 443 includes ring-shaped lugs 443a arranged at the outer periphery of the arc-shaped side plates 442, steel wire ropes 443b for pulling are wound on the ring-shaped lugs 443a, the arc-shaped side plates 442 can be pulled away from the center of the guide groove through the steel wire ropes 443b to expand the variable-diameter mouth of the guide groove, the lower end of the arc-shaped bottom plate 441 is provided with a take-up adjuster 443c of the steel wire ropes 443b, and the tightness degree of the steel wire ropes 443b is controlled through the take-up adjuster 443c of the steel wire ropes 443b to adjust the size of the guide groove.

[0058] In another embodiment, the pulling assembly 443 comprises two half-rings 443d respectively fixed on the outer periphery of the arc-shaped side plate 442, the opening ends of the two half-rings 443d are opposite, and adjusting bolts 443e for adjusting the tightness of the half-rings are arranged at the opening ends.

[0059] As a further improvement, the outer periphery of the support ring 421 is provided with a plurality of guide wheels 424 which are adapted to the detection line 433. A pair of intermediate partitions 45 are further arranged in the shell 41, the intermediate partitions 45 hold the take-up structure; annular grooves 451 adapted to the guide wheels 424 of the outer periphery of the support ring 421 are concavely arranged on the intermediate partitions 45, the guide wheels 424 are formed by two symmetrical wheel bodies, the two wheel bodies are respectively fixed on the front and rear sides of the support ring 421, a clamping groove is formed between the two wheel bodies, the detection line 433 is arranged between the two wheel bodies, one of the wheel bodies slides along the annular groove 451, and the other wheel body prevents the detection line 433 from slipping off.

[0060] As a further improvement, the probe guide groove is made of plastic steel material, which has good structural support, excellent rigidity and elasticity, and effectively avoids damage to the end of the hollow shaft caused by the probe guide groove.

[0061] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high-speed motor vehicle hollow axle bore array eddy current testing system for rapid detection of different sizes of in-service motor vehicle hollow axle bores and synchronous collection of detection lines, without the use of axle bore end adapters and collection motors, and without manual adjustment of centering, comprising a mobile trolley and a controller, a display and a detection device loaded on the mobile trolley, characterized in that, The detection device comprises: a shell, and a winding structure, a pushing and pulling detection structure, and a guiding structure which are sequentially connected in the shell; the winding structure forms three disc winding sections with variable diameters and winds the detection line into a double-circle planar spiral, and comprises a supporting ring rotatably arranged in the first disc winding section, a line holding block integrally arranged with the supporting ring, a plurality of single-side limiting rollers arranged in the second disc winding section, and a plurality of double-side limiting rollers arranged in the third disc winding section; the line holding block is connected to the end of the detection line and pulls the detection line to move along the disc winding sections with variable diameters to wind or unwind the detection line; the pushing and pulling detection structure comprises a detection probe, a detection line, and a pushing and pulling driving assembly, the detection probe is an array eddy current detection probe, the head of the array eddy current detection probe is conical, and the tail is connected to the detection line in a plug-in manner, the detection line is a drag chain cable and is packaged by a nylon tube, and the pushing and pulling driving assembly is used to push the array eddy current detection probe and the detection line to the front end of the inner hole of the hollow shaft or pull them out of the other end of the inner hole of the hollow shaft; the guiding structure is arranged at the detection probe outlet end of the shell and is used to guide the detection probe into the inner hole of the hollow shaft, and comprises a flexible arc-shaped probe guide slot with variable diameters, the probe guide slot is formed by a plurality of arc-shaped plates which are hingedly connected to each other, the outer periphery of the arc-shaped plates is provided with a pulling assembly, the pulling assembly pulls the arc-shaped plates to rotate to expand the probe guide slot to adapt to shaft holes with different sizes, and the end of the probe guide slot is embedded with a laser centering assembly which forms single-point focusing or three-point focusing; the pulling assembly comprises ring-shaped ears arranged on the outer periphery of the arc-shaped side plates, a steel wire rope for pulling is wound on the ring-shaped ears, and the lower end of the arc-shaped bottom plate is provided with a steel wire rope winding and unwinding adjuster; alternatively, the pulling assembly comprises two half-ring clamps which are respectively fixed on the outer periphery of the arc-shaped side plates, the opening ends of the two half-ring clamps are opposite, and the opening ends are provided with adjuster bolts for adjusting the tightness of the clamps; a centering intermediate partition plate is further arranged in the shell, the intermediate partition plate clamps the winding structure, and the intermediate partition plate is concavely provided with an annular groove which is matched with the guide wheels on the outer periphery of the supporting ring.

2. The high speed rail hollow axle bore array eddy current inspection system of claim 1, wherein, the arc-shaped plates comprise an arc-shaped bottom plate and two arc-shaped side plates, the arc-shaped side plates are hingedly arranged on both sides of the arc-shaped bottom plate, and torsional springs or magnetic fasteners are arranged at the hinge portions.

3. The high speed rail hollow axle bore array eddy current inspection system of claim 1, wherein, a plurality of guide wheels are arranged on the outer periphery of the supporting ring, and the guide wheels are matched with the detection line.

4. The high speed rail hollow axle bore array eddy current inspection system of claim 1, wherein, the probe guide slot is made of plastic steel.

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