Sliding shoe type magnetic flux leakage probe for steel rail tread detection and working method of sliding shoe type magnetic flux leakage probe

Abstract

The invention discloses a sliding shoe type steel rail tread detection magnetic flux leakage probe and a working method thereof. The sliding shoe type steel rail tread detection magnetic flux leakage probe comprises a pure ferromagnetic yoke structure, a sliding shoe device and a bearing structure, the pure ferromagnetic yoke structure comprises a magnetizer substructure and a magnetic yoke substructure; the magnetizer substructure is fixed on the sliding shoe device and is used for conducting a magnetizing field generated by the magnetic yoke substructure to the steel rail to magnetize the detected steel rail; the magnetic yoke substructure is suspended on a vehicle bearing structure and is used for generating a magnetizing field; the sliding shoe device comprises a magnetism gathering block, a sliding shoe and a sensor; the two ends of the sliding shoe are riveted and implanted with the magnetism gathering blocks, and the sliding shoe is connected with the elastic structure in the pure ferromagnetic yoke structure through one side of each magnetism gathering block, so that the sliding shoe is located below the pure ferromagnetic yoke structure and attached to the surface of the steel rail; the sensor is fixed to the sliding shoe and used for collecting magnetic flux leakage signals of the steel rail. The method can improve the magnetic flux leakage detection precision, and guarantees the safety and reliability of railway detection.

Description

Technical Field

[0001] The present invention relates to the technical field of track detection, and particularly to a magnetic flux leakage probe for detecting the tread of a sliding shoe type rail and its working method. Background Art

[0002] This section aims to provide background or context for the embodiments of the present invention described in the claims. The descriptions herein are not admitted to be prior art merely because they are included in this section.

[0003] The rail is one of the key components of railway infrastructure. As a key factor in the wheel-rail contact surface, the rail tread is long-term subjected to extrusion, friction and collision of the train wheelset, and is prone to damage. The fatigue damage of the rail tread includes hidden damage, fish scale pattern, tread peeling crack, etc. Evaluating the fatigue damage of the rail tread, improving the accuracy of rail condition assessment, researching a rapid detection method suitable for the fatigue damage of the rail tread, eliminating the fatigue damage of the rail tread in time, and reducing the rail breakage accidents caused by the development of the fatigue damage of the rail tread will effectively ensure the safety of railway operation.

[0004] At present, traditional magnetic flux leakage detection probes for rapid detection of rail treads use a large yoke system. However, the large yoke system has a large self-weight and cannot be directly fixed on the sliding shoe, resulting in vibration of the yoke during the operation of the vehicle, changing the lift-off state between the detection probe and the rail, and the magnetic flux leakage detection accuracy cannot meet the requirements. Summary of the Invention

[0005] An embodiment of the present invention provides a magnetic flux leakage probe for detecting the tread of a sliding shoe type rail to improve the magnetic flux leakage detection accuracy and ensure the safety and reliability of railway detection. The magnetic flux leakage probe for detecting the tread of a sliding shoe type rail includes: a pure iron yoke structure, a sliding shoe device, and a bearing structure; wherein,

[0006] The pure iron yoke structure includes a magnetic conductor sub-structure and a yoke sub-structure; the magnetic conductor sub-structure is fixed on the sliding shoe device, and the yoke sub-structure is suspended on the vehicle bearing structure; the yoke sub-structure is used to generate a magnetization field, and the magnetic conductor sub-structure is used to conduct the magnetization field generated by the yoke sub-structure to the rail to magnetize the rail to be detected.

[0007] The sliding shoe device includes a magnetic concentrating block, a sliding shoe, and a sensor; the magnetic concentrating blocks are riveted and implanted at both ends of the sliding shoe, and the sliding shoe is connected to the elastic structure in the pure iron yoke structure through one side of the magnetic concentrating block, so that the sliding shoe is located below the pure iron yoke structure and fits with the rail surface; the sensor is fixed on the sliding shoe and is used to collect the magnetic flux leakage signal of the rail.

[0008] An embodiment of the present invention also provides a working method of a magnetic flux leakage probe for detecting the tread of a sliding shoe type rail to improve the magnetic flux leakage detection accuracy and ensure the safety and reliability of railway detection. The method includes:

[0009] After magnetizing the rail to be detected using a pure iron yoke structure, the magnetic leakage signal of the magnetized rail collected by the sensor in the slider device is obtained;

[0010] Based on the magnetic leakage signal, the damage on the tread of the rail to be detected is detected.

[0011] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the working method of the slider type magnetic leakage probe for rail tread detection described above is implemented.

[0012] An embodiment of the present invention also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the working method of the slider type magnetic leakage probe for rail tread detection described above is implemented.

[0013] An embodiment of the present invention also provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the working method of the slider type magnetic leakage probe for rail tread detection described above is implemented.

[0014] In an embodiment of the present invention, a slider type magnetic leakage probe for rail tread detection is provided, including a pure iron yoke structure, a slider device, and a bearing structure. Among them, the pure iron yoke structure includes a magnetic conductor sub-structure and a magnetic yoke sub-structure; the magnetic conductor sub-structure is fixed on the slider device, and the magnetic yoke sub-structure is suspended on the vehicle bearing structure; the magnetic yoke sub-structure is used to generate a magnetization field, and the magnetic conductor sub-structure is used to conduct the magnetization field generated by the magnetic yoke sub-structure to the rail to magnetize the rail to be detected; the slider device includes a magnetic concentrating block, a slider, and a sensor; the magnetic concentrating blocks are riveted and implanted at both ends of the slider, and the slider is connected to the elastic structure in the pure iron yoke structure through one side of the magnetic concentrating block, so that the slider is located below the pure iron yoke structure and fits the surface of the rail; the sensor is fixed on the slider and is used to collect the magnetic leakage signal of the rail. In the above process, in the embodiment of the present invention, the slider is connected to the pure iron yoke structure through the elastic structure and fixed below the pure iron yoke structure, so that the slider fits the surface of the rail, ensuring that the lift-off state remains unchanged during the vehicle's travel, thereby improving the magnetic leakage detection accuracy and ensuring the safety and reliability of railway detection. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. In the drawings:

[0016] Figure 1 Schematic diagram of the sliding shoe type magnetic flux leakage probe for detecting the tread of a rail in an embodiment of the present invention;

[0017] Figure 2 Connection screw holes between the sliding shoe type magnetic flux leakage probe for detecting the tread of a rail and the flaw detector vehicle in an embodiment of the present invention;

[0018] Figure 3 Schematic diagram of the pure iron magnetic yoke structure in an embodiment of the present invention;

[0019] Figure 4 Schematic diagram of the iron core structure of the coil of the pure iron magnetic yoke in an embodiment of the present invention;

[0020] Figure 5 Schematic diagram of the structure of the sliding shoe device in an embodiment of the present invention;

[0021] Figure 6 Optimization schematic diagram of a sliding shoe type magnetic flux leakage probe for detecting the tread of a rail in an embodiment of the present invention;

[0022] Figure 7 Optimization schematic diagram of another sliding shoe type magnetic flux leakage probe for detecting the tread of a rail in an embodiment of the present invention;

[0023] Figure 8 Flow chart of the working method of the sliding shoe type magnetic flux leakage probe for detecting the tread of a rail in an embodiment of the present invention. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer and more understandable, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Herein, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not limit the present invention.

[0025] Figure 1 Schematic diagram of the sliding shoe type magnetic flux leakage probe for detecting the tread of a rail in an embodiment of the present invention. The sliding shoe type magnetic flux leakage probe for detecting the tread of a rail includes:

[0026] A pure iron magnetic yoke structure 2, a sliding shoe device 3, and a bearing structure; wherein,

[0027] The pure iron magnetic yoke structure 2 includes a magnetic conductor sub-structure and a magnetic yoke sub-structure; the magnetic conductor sub-structure is fixed on the sliding shoe device, and the magnetic yoke sub-structure is suspended on the vehicle bearing structure; the magnetic yoke sub-structure is used to generate a magnetization field, and the magnetic conductor sub-structure is used to conduct the magnetization field generated by the magnetic yoke sub-structure to the rail to magnetize the rail to be detected;

[0028] The slider device 3 includes a magnetic concentrating block, a slider, and a sensor; the magnetic concentrating blocks are riveted and implanted at both ends of the slider, and the slider is connected to the elastic structure in the pure iron yoke structure through one side of the magnetic concentrating block, so that the slider is located below the pure iron yoke structure and fits the surface of the rail; the sensor is fixed on the slider and is used to collect the magnetic leakage signal of the rail.

[0029] In a specific embodiment, the pure iron yoke structure is divided into two parts: a magnetic conductor sub-structure and a magnetic yoke sub-structure. The magnetic conductor sub-structure is fixed on the slider, and the magnetic yoke sub-structure is suspended above the vehicle bearing mechanism, overcoming the influence of vibration on the pure iron yoke structure during vehicle operation. The magnetization field generated by the magnetic yoke sub-structure is conducted to the rail through the magnetic conductor sub-structure fixed on the slider, and at the same time, the problems of vibration and magnetization time are solved.

[0030] As Figure 1 shown, in an embodiment, the bearing structure includes a cross beam 1 and a rocker. The pure iron yoke structure 2 and the slider device 3 are connected to the rocker through the cross beam 1, and the pure iron yoke structure 2 and the slider device 3 are fixed at preset positions.

[0031] Figure 2 For the connection screw hole between the slider type rail tread detection magnetic leakage probe and the flaw detection vehicle in the embodiment of the present invention. In a specific embodiment, as Figure 2 shown in serial numbers 11-14, the connection screw hole of the cross beam 1 is fixedly suspended on the vertical mechanism of the flaw detection vehicle.

[0032] In an embodiment, the cross beam 1 and the rocker are elastically connected to support the elastic lifting of the slider device.

[0033] In a specific embodiment, a torsion spring is built in the connecting block between the rocker and the cross beam, and a torsion spring is also arranged between the rocker and the connecting rod at the lower end of the rocker. The acting force of the two torsion springs makes the connecting joint have a certain opening elastic force, so as to achieve the effect of supporting the elastic lifting of the slider.

[0034] Figure 3 For the schematic diagram of the pure iron yoke structure in the embodiment of the present invention. In an embodiment, the pure iron yoke structure 2 further includes a protective cover 21 for protecting the magnetic yoke coil built in the pure iron yoke structure.

[0035] In an embodiment, the pure iron yoke structure 2 further includes an elastic structure located on both sides of the magnetic yoke coil for floating connection with the slider device.

[0036] In an embodiment, the pure iron yoke structure 2 further includes: an upper cover clamping plate 24 and a bolt 26; wherein,

[0037] the bolt is connected to the bearing structure for fixing the bearing structure;

[0038] the upper cover clamping plate is used to fix the magnetic yoke coil and also support the bolt and the bearing structure.

[0039] In a specific embodiment, as Figure 3 shown, the protective housing 21 functions to prevent collision, water, and dust for the built-in yoke coil. The pure iron yoke structure further includes: a pure iron yoke coil iron core structure 22 with an elastic structure (magnetic conduction steel wire brush). By implanting magnetic conduction steel wire brushes at both ends of the iron core, a floating connection for magnetic conduction is achieved between the magnetic concentration blocks at both ends of the slider and the coil yoke through the steel wire brushes, so as to achieve the effect that the signal strength is not affected by lift-off. At the same time, due to the soft contact effect of the steel wire brush, during the driving and detection of the flaw detection vehicle on the railway line, the up and down floating jumps generated by the slider can be realized, so as to achieve flexible and adaptive adjustment. The pure iron yoke structure further includes a coil 23 and a coil fixing clamp 25. The yoke coil is fixed by the corresponding card slots of the coil fixing clamp 25 and the upper cover clamping plate 24 of the yoke. The bolt 26 is fixed through the upper cover clamping plate 24 of the yoke, and the bolt 26 is connected and fixed to the cross beam 1 to form an integral pure iron yoke structure.

[0040] Figure 4 is a schematic diagram of the pure iron yoke coil iron core structure in the embodiment of the present invention. The pure iron yoke coil iron core structure includes: a left magnetic concentration steel wire brush 221, a right magnetic concentration steel wire brush 223, and a pure iron coil iron core 222. Figure 5 is a schematic diagram of the structure of the slider device in the embodiment of the present invention. The slider device 3 includes: a slider 32, a first magnetic concentration block 31, a second magnetic concentration block 34, and a sensor 33. Among them, T-shaped first magnetic concentration block 31 and second magnetic concentration block 34 structures are riveted and implanted at both ends of the slider, and are floatingly connected to the left magnetic concentration steel wire brush 221 and the right magnetic concentration steel wire brush 223 to fill the gap at the air gap and optimize the magnetic field strength and the stability of the magnetic field strength. As Figure 6 shown is an optimized schematic diagram of a slider type rail tread detection magnetic flux leakage probe in the embodiment of the present invention. A small U-shaped component can also be added to both ends of the U-shaped yoke coil and fixed on the slider. The yoke can move up and down. This solution can reduce the air magnetic resistance and increase the cross-sectional area at both ends of the yoke, thereby enhancing the magnetic field magnitude of the entire magnetic circuit. Figure 7 is another optimized schematic diagram of a slider type rail tread detection magnetic flux leakage probe in the embodiment of the present invention. A steel wire brush can also be added to the lower end of the U-shaped yoke coil to reduce the air magnetic resistance in the magnetic circuit and increase the magnetic field of the magnetic circuit. In addition, the pure iron yoke coil iron core structure 22 is buckled into the slider through the T-shaped magnetic concentration block of the slider and then riveted tightly. As Figure 5 shown in, 35 and 36 are sealant filling parts. Sealant is filled to prevent the magnetic concentration block from loosening and keep the magnetic concentration block and the slider in a fixed position.

[0041] In a specific embodiment, the sensor of the slider device is fixed on the slider, ensuring a fixed distance between the sensor and the rail. While the slider is in close contact with the rail, the fitting between the slider and the rail is guaranteed. When the slider presses down on the rail, the elastic structure ensures that the pressure exerted by the slider on the rail does not exceed a preset pressure threshold. The present invention overcomes the influence of vibration on the sensor, optimizes the magnetic flux leakage signal collected by the sensor, thereby improving the magnetic flux leakage detection accuracy and ensuring the safety and reliability of railway detection.

[0042] In an embodiment of the present invention, a working method of a magnetic flux leakage probe for detecting the tread of a rail with a slider is also provided, as described in the following embodiments. Since the principle of solving problems by this method is similar to that of the magnetic flux leakage probe for detecting the tread of a rail with a slider, the implementation of this device can refer to the implementation of the magnetic flux leakage probe for detecting the tread of a rail with a slider, and the repeated parts will not be described again.

[0043] Figure 8 The flowchart of the working method of the magnetic flux leakage probe for detecting the tread of a rail with a slider in an embodiment of the present invention is as follows. The method includes:

[0044] Step 801, after magnetizing the rail to be detected by using a pure iron yoke structure, obtain the magnetic flux leakage signal of the magnetized rail collected by the sensor in the slider device;

[0045] Step 802, detect the damage of the tread of the rail to be detected according to the magnetic flux leakage signal.

[0046] In a specific embodiment, the magnetic flux leakage probe for detecting the tread of a rail with a slider obtains the magnetic flux leakage signal of the tread damage of the rail. When there is a magnetic flux leakage signal on the tread of the rail, it is determined that the rail is damaged.

[0047] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the working method of the magnetic flux leakage probe for detecting the tread of a rail with a slider as described above is implemented.

[0048] An embodiment of the present invention also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the working method of the magnetic flux leakage probe for detecting the tread of a rail with a slider as described above is implemented.

[0049] An embodiment of the present invention also provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the working method of the magnetic flux leakage probe for detecting the tread of a rail with a slider as described above is implemented.

[0050] In an embodiment of the present invention, a magnetic flux leakage probe for detecting the tread of a rail in a sliding shoe type is provided, which includes a pure iron magnetic yoke structure, a sliding shoe device, and a bearing structure; wherein, the pure iron magnetic yoke structure includes a magnetic conductor sub-structure and a magnetic yoke sub-structure; the magnetic conductor sub-structure is fixed on the sliding shoe device, and the magnetic yoke sub-structure is suspended on the vehicle bearing structure; the magnetic yoke sub-structure is used to generate a magnetization field, and the magnetic conductor sub-structure is used to conduct the magnetization field generated by the magnetic yoke sub-structure to the rail to magnetize the rail to be detected; the sliding shoe device includes a magnetic concentrating block, a sliding shoe, and a sensor; the magnetic concentrating blocks are riveted and implanted at both ends of the sliding shoe, and the sliding shoe is connected to the elastic structure in the pure iron magnetic yoke structure through one side of the magnetic concentrating block, so that the sliding shoe is located below the pure iron magnetic yoke structure and fits with the surface of the rail; the sensor is fixed on the sliding shoe and is used to collect the magnetic flux leakage signal of the rail. In the above process, in the embodiment of the present invention, the sliding shoe is connected to the pure iron magnetic yoke structure through the elastic structure, and the sliding shoe is fixed below the pure iron magnetic yoke structure, so that the sliding shoe fits with the surface of the rail, ensuring that the lift-off state remains unchanged during the movement of the vehicle, thereby improving the magnetic flux leakage detection accuracy and ensuring the safety and reliability of railway detection.

[0051] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can be implemented in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can be implemented in the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0052] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of processes and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0053] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means implements the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0054] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so as to cause a series of operational steps to be performed on the computer or other programmable apparatus to generate a computer-implemented process, thereby the instructions executed on the computer or other programmable apparatus provide steps for realizing the functions specified in one process or multiple processes and / or one block or multiple blocks in the flow Figure 1 one process or multiple processes and / or blocks Figure 1 or multiple blocks.

[0055] The specific embodiments described above further elaborate on the object, technical solution and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sliding shoe type rail tread detection magnetic flux leakage probe, characterized in that: include: Pure iron magnetic yoke structure, sliding shoe device, bearing structure; wherein, The pure iron magnetic yoke structure includes a magnetic conductive substructure and a magnetic yoke substructure; the magnetic conductive substructure is fixed on the sliding shoe device, and the magnetic yoke substructure is suspended on the vehicle bearing structure; the magnetic yoke substructure is used to generate a magnetizing field, and the magnetic conductive substructure is used to conduct the magnetizing field generated by the magnetic yoke substructure to the rail to magnetize the detected rail; The sliding shoe device includes a magnetic block, a sliding shoe, and a sensor; both ends of the sliding shoe are riveted and embedded in the magnetic block, and the sliding shoe is connected to the elastic structure in the pure ferromagnetic yoke structure through one side of the magnetic block, so that the sliding shoe is located below the pure ferromagnetic yoke structure and fits with the surface of the rail; the sensor is fixed on the sliding shoe and is used to collect the leakage magnetic signal of the rail.

2. The sliding shoe type rail tread detection magnetic flux leakage probe according to claim 1, characterized in that: The bearing structure comprises a crossbeam and a rocker, and the pure iron magnetic yoke structure, the sliding shoe device and the rocker are connected via the crossbeam to fix the pure iron magnetic yoke structure and the sliding shoe device at a preset position.

3. The sliding shoe type rail tread detection magnetic flux leakage probe as claimed in claim 2, characterized in that: The cross beam and the rocker are elastically connected to support the elastic lifting and lowering of the sliding shoe device.

4. The sliding shoe type rail tread detection magnetic flux leakage probe according to claim 1, characterized in that: The pure iron magnetic yoke structure also includes a protective cover shell for protecting the built-in magnetic yoke coil of the pure iron magnetic yoke structure.

5. The sliding shoe type rail tread detection magnetic flux leakage probe as claimed in claim 4, characterized in that: The pure iron yoke structure also includes: an upper cover plate and bolts; wherein, The bolts are connected to the bearing structure and are used to fix the bearing structure; The upper cover clamp is used to fix the yoke coil and is also used to support the bolts and the bearing structure.

6. The sliding shoe type rail tread detection magnetic flux leakage probe as claimed in claim 4, characterized in that: The pure iron magnetic yoke structure also includes an elastic structure, which is located on both sides of the magnetic yoke coil and is used for floating connection with the sliding shoe device.

7. A working method of the sliding shoe type rail tread detection magnetic flux leakage probe according to any one of claims 1 to 6, characterized in that: include: After the steel rail to be inspected is magnetized by using a pure iron magnetic yoke structure, a leakage magnetic signal of the magnetized steel rail collected by a sensor in a sliding shoe device is obtained; According to the magnetic leakage signal, the damage of the rail tread is detected.

8. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method of claim 7 is implemented.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method of claim 7 is implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to claim 7 is implemented.

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