Locomotive aluminum skirt piston profiling array eddy current detection sensor and use method

Abstract

The invention discloses a locomotive aluminum skirt piston profiling array eddy current detection sensor and a use method, the locomotive aluminum skirt piston profiling array eddy current detection sensor comprises a connecting piece, a profiling support and a plurality of flexible eddy current detection coils, the profiling support comprises a mounting end and a detection end, the mounting end is embedded in the connecting end, and the detection end is embedded in the connecting end; the arc-shaped structure comprises an arc-shaped groove bottom face, two arc-shaped groove wall faces and two arc-shaped groove edge faces, the arc-shaped groove bottom face is used for being attached to the groove bottom of the annular sliding groove, the two arc-shaped groove wall faces are used for being attached to the two groove walls of the annular sliding groove respectively, and the two arc-shaped groove edge faces are used for being attached to the two groove edges of the annular sliding groove respectively; the plurality of flexible eddy current detection coils are embedded in the arc-shaped groove bottom surface, the two arc-shaped groove wall surfaces and the two arc-shaped groove edge surfaces in an array manner, and the plurality of flexible eddy current detection coils are used for being in communication connection with detection equipment. According to the locomotive aluminum skirt piston profiling array eddy current detection sensor and the use method, rapid detection of multiple stations is carried out on the annular sliding groove, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of eddy current detection, and more particularly to a locomotive aluminum skirt piston profile array eddy current detection sensor and a use method thereof. Background Art

[0002] In modern industry, much equipment is assembled from metal components. To ensure safe operation, in-service, in-situ nondestructive testing (NDT) or partial disassembly testing is often required to verify the absence of defects such as fatigue cracks that could compromise safety. Traditionally, these NDT methods have primarily employed magnetic particle testing (MPT) for ferromagnetic components and penetrant testing (PPT) for non-ferromagnetic workpieces. Because both methods pose environmental risks, particularly penetrant testing, which can be harmful to humans, have led to calls for changes in testing methods and processes in recent years.

[0003] The eddy current method can detect ferromagnetic or non-ferromagnetic metal parts quickly and without pollution. However, for many special parts, their shapes are relatively complex, making it difficult to implement fast and effective detection.

[0004] Locomotive steel top aluminum skirt combination piston (such as Figure 1 The piston (partial diagram shown) is a key component of diesel locomotives and needs to withstand high loads. It is prone to problems such as abnormal wear of the ring groove, cracking of the piston top, cracking of the steel top circumference, and failure of the piston skirt. Piston cracks can damage the diesel engine and cause safety accidents such as locomotive shutdown. It is crucial to carry out effective inspection of the piston to ensure its operating quality. At present, each locomotive depot uses the penetration method to detect crack defects on the surface of the piston and the edges of bolt holes, pin seat holes, and U-shaped grooves. The penetration method can detect surface opening defects, but the detection time is long, the accuracy of the test results is limited by the experience of the testers, the reliability is low, and the detection efficiency is low. The greater disadvantage is that the materials used for penetration are hazardous chemicals and require special storage. The penetrant materials used pollute the environment. Failure of environmental protection inspections in locomotive depots occurs frequently, and rectification and remediation make it impossible to carry out the normal flaw detection work. The use of eddy current to detect surface defects has high sensitivity, does not require coupling agents, is environmentally friendly, and is pollution-free. However, an annular groove is provided in the pin seat hole on the side of the aluminum skirt piston of a railway locomotive. The annular groove is an annular U-shaped groove with a gradually varying depth, including a groove bottom, a groove wall, and a groove edge (such as Figure 2 (Schematic diagram of the partial structure of the cut block to be inspected) The annular U-shaped groove has an inclined elliptical hole in the center. The groove bottom, walls, and edges are prone to fatigue cracking. The complex and irregular structure poses a significant challenge to rapid eddy current testing. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to propose a locomotive aluminum skirt piston profile array eddy current detection sensor and a method of use to perform rapid detection of annular chute at multiple stations to improve detection efficiency.

[0006] Based on the above-mentioned purpose, the present invention provides a car aluminum skirt piston profile array eddy current detection sensor, including a connecting piece, a profile bracket and a plurality of flexible eddy current detection coils, wherein: the connecting piece includes a connecting end, the profile bracket includes a mounting end and a detection end arranged in back to back, the mounting end is embedded and installed in the connecting end, and the detection end is an arc structure adapted to the annular slide groove, the arc structure includes an arc groove bottom surface, two arc groove wall surfaces, and two arc groove edge surfaces, the arc groove bottom surface is used to fit on the groove bottom of the annular slide groove, the two arc groove wall surfaces are respectively used to fit on the two groove walls of the annular slide groove, and the two arc groove edge surfaces are respectively used to fit on the two groove edges of the annular slide groove; the plurality of flexible eddy current detection coils are respectively embedded and installed in the arc groove bottom surface, the two arc groove wall surfaces, and the two arc groove edge surfaces in an array, and the plurality of flexible eddy current detection coils are used to communicate and connect with the eddy current detection equipment.

[0007] Optionally, the contoured bracket is an elastic contoured bracket.

[0008] Optionally, a wear-resistant layer is provided on the surface of the flexible array eddy current detection coil.

[0009] Optionally, the contoured bracket is integrally formed.

[0010] Optionally, a handheld operating member is provided on an end of the connecting member that is arranged opposite to the connecting end.

[0011] Optionally, the handheld operating member is a handheld probe.

[0012] Optionally, an auxiliary rotation structure is provided on one end of the connecting member that is arranged opposite to the connecting end.

[0013] Optionally, the auxiliary rotating structure is an electrically driven rotating shaft.

[0014] Optionally, the connecting member is further provided with a pulley which can slide in the pin seat hole.

[0015] Based on the same inventive concept, the present invention also provides a method for using a locomotive aluminum skirt piston profile array eddy current detection sensor, including using the locomotive aluminum skirt piston profile array eddy current detection sensor described in any of the above items to perform eddy current detection on an annular slide, including the following steps: Step 1, embedding a plurality of flexible eddy current detection coils in an array on the arc groove bottom surface, two arc groove wall surfaces, and two arc groove edge surfaces of the profile bracket, embedding the mounting end of the profile bracket on the connecting end of the connector, and connecting the plurality of flexible eddy current detection coils to the eddy current detection equipment for communication; Step 2, slowly moving the detection end of the profile bracket close to the annular slide, so that the arc groove bottom surface, two arc groove wall surfaces, and two arc groove edge surfaces of the profile bracket are respectively fitted with the groove bottom, two groove walls, and two groove edges of the annular slide; Step 3, if manual For held inspection, the operator maintains a constant speed and performs sliding inspection along the annular chute. During the process, pay attention to the data and signal changes displayed by the eddy current detection equipment. If it is an automatic rotation inspection, start the auxiliary rotation structure to make the locomotive aluminum skirt piston contoured array eddy current detection sensor automatically rotate around the annular chute to complete the full circle inspection, while paying close attention to the status of the eddy current detection equipment. Step 4: During the inspection, the eddy current detection equipment automatically records the data collected by the flexible eddy current detection coil, including the eddy current signal changes of different inspected parts. Step 5: After the inspection is completed, analyze the recorded data and compare it with the normal standard data to determine whether there are cracks in the bottom, wall, edge and other parts of the annular chute. If abnormal signal fluctuations or areas with large deviations from the standard data are found, the area needs to be marked and further analyzed.

[0016] The present invention provides a locomotive aluminum skirt piston profile array eddy current detection sensor and a method of use. The locomotive aluminum skirt piston profile array eddy current detection sensor includes a connector, a profile bracket and a plurality of flexible eddy current detection coils. First, the plurality of flexible eddy current detection coils are respectively embedded and installed in an array on the arc groove bottom surface, two arc groove wall surfaces and two arc groove edge surfaces of the profile bracket, the mounting end of the profile bracket is embedded and installed on the connecting end of the connector, the plurality of flexible eddy current detection coils are communicatively connected to the eddy current detection equipment, and the detection end of the profile bracket is slowly approached to the annular slide groove, so that the arc groove bottom surface, two arc groove wall surfaces and two arc groove edge surfaces of the profile bracket are respectively fitted with the groove bottom, two groove walls and two groove edges of the annular slide groove; then, if handheld detection is adopted, the operator keeps At a constant speed, perform sliding inspection along the annular chute, and pay attention to the data and signal changes displayed by the eddy current detection equipment during the process; if it is an automatic rotation detection, start the auxiliary rotation structure to make the locomotive aluminum skirt piston profile array eddy current detection sensor automatically rotate around the annular chute to complete the full circle detection, while paying close attention to the status of the eddy current detection equipment. During the detection process, the eddy current detection equipment automatically records the data collected by the flexible eddy current detection coil, including the eddy current signal changes of different detected parts; finally, after the detection is completed, analyze the recorded data and compare it with the normal standard data to determine whether there are cracks in the bottom, wall, edge and other parts of the annular chute. If abnormal signal fluctuations or areas with large deviations from the standard data are found, the area needs to be marked and further analyzed. The locomotive aluminum skirt piston profile array eddy current detection sensor and its use method provided by the present invention perform rapid detection of the annular chute at multiple workstations, thereby improving detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the objects and advantages of the present invention.

[0018] Figure 1 It is a partial schematic diagram of a steel-top and aluminum-skirt combined piston for a locomotive in the prior art;

[0019] Figure 2 This is a partial schematic diagram of the structure of the piston block to be tested;

[0020] Figure 3 This is a schematic structural diagram of a locomotive aluminum skirt piston profile array eddy current detection sensor according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic structural diagram of a profile bracket in a locomotive aluminum skirt piston profile array eddy current detection sensor according to an embodiment of the present invention;

[0022] Figure 5This is a structural schematic diagram of a locomotive aluminum skirt piston profile array eddy current detection sensor in accordance with an embodiment of the present invention, in which a plurality of flexible eddy current detection coils are embedded and mounted on a profile bracket;

[0023] Figure 6 This is a flow chart of a method for using a locomotive aluminum skirt piston profile array eddy current detection sensor according to an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 1: Connector; 2: Contour bracket; 3: Flexible eddy current detection coil; 4: Connecting end; 5: Mounting end; 6: Detection end; 7: Arc groove bottom; 8: Arc groove wall; 9: Arc groove edge; 10: Handheld operating part; 11: Annular slide; 12: Groove bottom; 13: Groove wall; 14: Groove edge. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0027] like Figures 3 to 5 As shown, the locomotive aluminum skirt piston profile array eddy current detection sensor provided by the present invention includes a connecting member 1, a profile bracket 2 and a plurality of flexible eddy current detection coils 3, wherein: the connecting member 1 includes a connecting end 4, the profile bracket 2 includes a mounting end 5 and a detection end 6 arranged in back to back, the mounting end 5 is embedded and installed in the connecting end 4, and the detection end 6 is an arc structure adapted to the annular slide 11, the arc structure includes an arc groove bottom surface 7, two arc groove wall surfaces 8, and two arc groove edge surfaces 9, the arc groove bottom surface 7 is used to fit on the groove bottom 12 of the annular slide 11, the two arc groove wall surfaces 8 are respectively used to fit on the two groove walls 13 of the annular slide 11, and the two arc groove edge surfaces 9 are respectively used to fit on the two groove edges 14 of the annular slide 11; a plurality of flexible eddy current detection coils 3 are embedded and installed in the arc groove bottom surface 7, the two arc groove wall surfaces 8, and the two arc groove edge surfaces 9 in an array, and the plurality of flexible eddy current detection coils 3 are used to communicate with the eddy current detection equipment.

[0028] The locomotive aluminum skirt piston profile array eddy current detection sensor provided by the present invention includes a connector 1, a profile bracket 2 and a plurality of flexible eddy current detection coils 3. First, the plurality of flexible eddy current detection coils 3 are respectively embedded in an array and installed on the arc groove bottom surface 7, two arc groove wall surfaces 8, and two arc groove edge surfaces 9 of the profile bracket 2. The mounting end of the profile bracket 2 is embedded and installed on the connecting end 4 of the connector 1. The plurality of flexible eddy current detection coils 3 are communicatively connected to the eddy current detection equipment. The detection end 6 of the profile bracket 2 is slowly approached to the annular chute 11, so that the arc groove bottom surface 7, two arc groove wall surfaces 8, and two arc groove edge surfaces 9 of the profile bracket 2 are respectively aligned with the groove bottom 12, two groove walls 13, and two The edges 14 of the grooves are fitted together; then, the locomotive aluminum skirt piston profile array eddy current detection sensor is slid along the annular chute 11 for detection, completing the full circle detection. During the process, pay attention to the data and signal changes displayed by the eddy current detection equipment. During the detection process, the eddy current detection equipment automatically records the data collected by the flexible eddy current detection coil 3, including the eddy current signal changes of different detected parts; finally, after the detection is completed, the recorded data is analyzed and compared with the normal standard data to determine whether there are cracks in the groove bottom 12, groove wall 13, groove edge 14 and other parts of the annular chute 11. If abnormal signal fluctuations or areas with large deviations from the standard data are found, the areas need to be marked and further analyzed. The locomotive aluminum skirt piston profile array eddy current detection sensor provided by the present invention performs rapid detection of the annular chute 11 at multiple stations, thereby improving detection efficiency.

[0029] In one embodiment of the present invention, the profiling bracket 2 is an elastic profiling bracket 2, which can better match the multiple positions of the annular chute 11, such as Figure 2 The groove bottom 12, groove wall 13, groove edge 14 are fitted and matched as shown, thereby improving the detection accuracy of the locomotive aluminum skirt piston profile array eddy current detection sensor.

[0030] In one embodiment of the present invention, a wear-resistant layer is provided on the surface of the flexible array eddy current detection coil, which can increase the service life of the flexible array eddy current detection coil, and further increase the service life of the locomotive aluminum skirt piston contoured array eddy current detection sensor.

[0031] In one embodiment of the present invention, the contoured bracket 2 is integrally formed, which reduces the number of molds, simplifies the manufacturing process, is conducive to mass production, and improves production efficiency.

[0032] like Figure 3 As shown, a handheld operating member 10 is provided on the end of the connector 1 that is opposite to the connecting end 4. In this embodiment, the handheld operating member 10 can be easily operated, thereby improving the ease of use of the locomotive aluminum skirt piston profile array eddy current detection sensor.

[0033] In one embodiment of the present invention, the handheld operating member 10 is a handheld probe. When handheld detection is used, the operator can use the handheld probe to drive the profiling bracket 2 to perform eddy current detection on each station of the annular slide 11, thereby improving the ease of use of the locomotive aluminum skirt piston profiling array eddy current detection sensor.

[0034] In one embodiment of the present invention, an auxiliary rotating structure is provided on the end of the connecting member 1 that is arranged opposite to the connecting end 4. When automatic rotation detection is adopted, the auxiliary rotating structure can automatically drive the profiling bracket 2 to perform eddy current detection on each station of the annular slide groove 11, thereby improving the detection efficiency of the locomotive aluminum skirt piston profiling array eddy current detection sensor.

[0035] In one embodiment of the present invention, the auxiliary rotating structure is an electric drive rotating shaft, which is easy to operate and improves the ease of use of the locomotive aluminum skirt piston contour array eddy current detection sensor.

[0036] In one embodiment of the present invention, the connector 1 is further provided with a pulley that can slide in the pin seat hole. The pulley drives the contoured bracket 2 to slide more smoothly in the annular groove 11, thereby improving the fluency of detection.

[0037] like Figures 1 to 6 As shown, based on the same inventive concept, the present invention also provides a method for using a locomotive aluminum skirt piston profile array eddy current detection sensor, using any of the above locomotive aluminum skirt piston profile array eddy current detection sensors to perform eddy current detection on the annular chute 11, comprising the following steps:

[0038] Step 1: Multiple flexible eddy current detection coils 3 are embedded in an array on the arc groove bottom surface 7, two arc groove wall surfaces 8, and two arc groove edge surfaces 9 of the contour bracket 2, and the mounting end of the contour bracket 2 is embedded in the connecting end 4 of the connecting member 1, and the multiple flexible eddy current detection coils 3 are communicatively connected to the eddy current detection equipment;

[0039] Step 2: slowly move the detection end 6 of the profiling bracket 2 closer to the annular chute 11, so that the arc groove bottom surface 7, two arc groove wall surfaces 8, and two arc groove edge surfaces 9 of the profiling bracket 2 are respectively aligned with the groove bottom 12, two groove walls 13, and two groove edges 14 of the annular chute 11;

[0040] Step 3: If handheld testing is used, the operator maintains a constant speed and performs sliding testing along the annular chute 11, paying attention to the data and signal changes displayed by the eddy current testing equipment during the process; if automatic rotation testing is used, the auxiliary rotation structure is activated to make the locomotive aluminum skirt piston contour array eddy current testing sensor automatically rotate around the annular chute 11 to complete the full circle testing, while closely monitoring the status of the eddy current testing equipment;

[0041] Step 4: During the detection process, the eddy current detection equipment automatically records the data collected by the flexible eddy current detection coil 3, including the changes in eddy current signals at different detected parts;

[0042] Step 5. After the test is completed, analyze the recorded data and compare it with the normal standard data to determine whether there are cracks in the groove bottom 12, groove wall 13, groove edge 14 and other parts of the annular chute 11. If abnormal signal fluctuations or areas with large deviations from the standard data are found, the area needs to be marked and further analyzed.

[0043] The present invention provides a locomotive aluminum skirt piston profile array eddy current detection sensor and a method of use. The locomotive aluminum skirt piston profile array eddy current detection sensor includes a connector 1, a profile bracket 2 and a plurality of flexible eddy current detection coils 3. First, the plurality of flexible eddy current detection coils 3 are respectively embedded and installed in an array on the arc groove bottom surface 7, two arc groove wall surfaces 8, and two arc groove edge surfaces 9 of the profile bracket 2. The mounting end of the profile bracket 2 is embedded and installed on the connecting end 4 of the connector 1. The plurality of flexible eddy current detection coils 3 are communicatively connected to the eddy current detection equipment. The detection end 6 of the profile bracket 2 is slowly moved close to the annular slide groove 11, so that the arc groove bottom surface 7, two arc groove wall surfaces 8, and two arc groove edge surfaces 9 of the profile bracket 2 are respectively aligned with the groove bottom of the annular slide groove 11. 12, the two groove walls 13, and the two groove edges 14 are arranged in a close-fitting manner; then, the locomotive aluminum skirt piston contour array eddy current detection sensor is slid along the annular chute 11 for detection, completing the full circle detection. During the process, pay attention to the data and signal changes displayed by the eddy current detection equipment. During the detection process, the eddy current detection equipment automatically records the data collected by the flexible eddy current detection coil 3, including the eddy current signal changes of different detected parts; finally, after the detection is completed, the recorded data is analyzed and compared with the normal standard data to determine whether there are cracks in the groove bottom 12, groove wall 13, groove edge 14 and other parts of the annular chute 11. If abnormal signal fluctuations or areas with large deviations from the standard data are found, the areas need to be marked and further analyzed. The locomotive aluminum skirt piston contour array eddy current detection sensor and its use method provided by the present invention perform rapid detection of the annular chute 11 at multiple workstations, improving detection efficiency.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A locomotive aluminum skirt piston profile array eddy current detection sensor, characterized in that: The invention comprises a connecting piece, a contoured bracket and a plurality of flexible eddy current detection coils, wherein: The connecting piece includes a connecting end, and the contoured bracket includes a mounting end and a detection end arranged in back directions. The mounting end is embedded and installed in the connecting end. The detection end is an arc-shaped structure adapted to the annular chute. The arc-shaped structure includes an arc-shaped groove bottom surface, two arc-shaped groove wall surfaces, and two arc-shaped groove edge surfaces. The arc-shaped groove bottom surface is used to fit on the groove bottom of the annular chute, the two arc-shaped groove wall surfaces are respectively used to fit on the two groove walls of the annular chute, and the two arc-shaped groove edge surfaces are respectively used to fit on the two groove edges of the annular chute; The plurality of flexible eddy current detection coils are respectively embedded and installed in an array on the bottom surface of the arc groove, the two arc groove walls, and the two arc groove edge surfaces. The plurality of flexible eddy current detection coils are used for communication connection with eddy current detection equipment.

2. The locomotive aluminum skirt piston profile array eddy current detection sensor according to claim 1, characterized in that: The contoured bracket is an elastic contoured bracket.

3. The locomotive aluminum skirt piston profile array eddy current detection sensor according to claim 1, characterized in that: The surface of the flexible array eddy current detection coil is provided with a wear-resistant layer.

4. The locomotive aluminum skirt piston profile array eddy current detection sensor according to claim 1, characterized in that: The contoured bracket is integrally formed.

5. The locomotive aluminum skirt piston profile array eddy current detection sensor according to claim 1, characterized in that: A handheld operating piece is provided on one end of the connecting piece that is arranged opposite to the connecting end.

6. The locomotive aluminum skirt piston profile array eddy current detection sensor according to claim 5, characterized in that: The handheld operating member is a handheld probe.

7. The locomotive aluminum skirt piston profile array eddy current detection sensor according to claim 1, characterized in that: An auxiliary rotation structure is provided on one end of the connecting member that is arranged opposite to the connecting end.

8. The locomotive aluminum skirt piston profile array eddy current detection sensor according to claim 7, characterized in that: The auxiliary rotating structure is an electrically driven rotating shaft.

9. The locomotive aluminum skirt piston profile array eddy current detection sensor according to claim 1, characterized in that: The connecting piece is also provided with a pulley which can slide in the pin seat hole.

10. A method for using a locomotive aluminum skirt piston profile array eddy current detection sensor, comprising using the locomotive aluminum skirt piston profile array eddy current detection sensor according to any one of claims 1 to 9 to perform eddy current detection on an annular chute, characterized in that: The following steps are involved: Step 1: Embed multiple flexible eddy current detection coils in an array on the bottom surface, two arc-shaped groove walls, and two arc-shaped groove edges of the contoured bracket, embed the mounting end of the contoured bracket on the connecting end of the connector, and connect the multiple flexible eddy current detection coils to the eddy current detection equipment for communication; Step 2: slowly move the detection end of the profiling bracket close to the annular chute, so that the arc groove bottom surface, two arc groove wall surfaces, and two arc groove edge surfaces of the profiling bracket are respectively aligned with the groove bottom, two groove walls, and two groove edges of the annular chute; Step 3: If handheld testing is used, the operator should maintain a constant speed and perform sliding testing along the annular chute, paying attention to the data and signal changes displayed by the eddy current testing equipment during the process; if automatic rotation testing is used, the auxiliary rotation structure is activated to make the locomotive aluminum skirt piston contour array eddy current testing sensor automatically rotate around the annular chute to complete the full circle testing, while closely monitoring the status of the eddy current testing equipment; Step 4: During the testing process, the eddy current testing equipment automatically records the data collected by the flexible eddy current testing coil, including the changes in eddy current signals at different tested parts; Step 5. After the test is completed, analyze the recorded data and compare it with the normal standard data to determine whether there are cracks in the bottom, wall, edge and other parts of the annular chute. If abnormal signal fluctuations or areas with large deviations from the standard data are found, the area needs to be marked and further analyzed.

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