Steel rail welding seam eddy current detection probe

Abstract

The utility model discloses a steel rail welding seam eddy current detection probe, which comprises a plurality of eddy current detection coils, a probe wire, a U-shaped elastic framework and a handle, the U-shaped elastic framework comprises a groove bottom, a first side wall and a second side wall, and the included angle between the first side wall and the second side wall is adjustable. A first group of eddy current detection coils is mounted on the surface, facing the second side wall, of the first side wall and is used for being attached to the upper inclined surface of the rail bottom, and a second group of eddy current detection coils is mounted on the surface, facing the first side wall, of the second side wall and is used for being attached to the lower surface of the rail bottom; a third group of eddy current detection coils is mounted at the bottom of the groove and is used for being attached to the side edge of the rail bottom; the handle is installed on the side, opposite to the opening end of the U-shaped elastic framework, of the groove bottom of the U-shaped elastic framework. According to the eddy current detection probe for the steel rail welding seam, the probe is attached to the welding seam at the bottom of the steel rail, so that the accuracy of a welding seam detection result and the detection efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of eddy current testing technology, and more specifically, to an eddy current testing probe for rail welds. Background Technology

[0002] Railway rail welds are one of the weakest links, prone to rail breaks, which can affect railway safety. To ensure the safety and reliability of the rails in service, non-destructive testing of the rail welds is necessary to guarantee welding quality and thus ensure safe train operation. The rail base is subjected to tensile stress, making the quality of the weld at the base particularly critical; any cracks can easily develop and cause rail breakage.

[0003] The accuracy and efficiency of existing eddy current testing probes for detecting rail bottom welds need to be improved. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a rail weld eddy current detection probe, so that the probe can better fit on the weld at the bottom of the rail, thereby improving the accuracy and efficiency of weld detection results.

[0005] Based on the above objectives, this utility model provides an eddy current detection probe for rail welds, comprising multiple eddy current detection coils, probe wires, a U-shaped elastic frame, and a handle. The multiple eddy current detection coils are divided into a first group, a second group, and a third group. The U-shaped elastic frame includes a groove bottom and a first sidewall and a second sidewall arranged opposite each other. The angle between the first sidewall and the second sidewall is adjustable. The first group of eddy current detection coils is mounted on the side of the first sidewall facing the second sidewall. The first group of eddy current detection coils is used for contact detection with the rail weld. The bottom inclined surfaces are in contact with each other. The second set of eddy current detection coils is installed on the side of the second sidewall facing the first sidewall. The second set of eddy current detection coils is used to contact the lower surface of the rail. The third set of eddy current detection coils is installed at the bottom of the groove. The third set of eddy current detection coils is used to contact the side of the rail. The handle is installed on the bottom of the groove of the U-shaped elastic frame on the side facing away from the opening end of the U-shaped elastic frame. One end of the probe wire passes through the handle and is communicatively connected to the multiple eddy current detection coils. The other end of the probe wire is used to connect to the eddy current flaw detector.

[0006] Optionally, it also includes two rollers, which are rotatably mounted at both ends of the first sidewall and the second sidewall, respectively.

[0007] Optionally, the first group of eddy current detection coils includes eddy current detection coils #1, #2, #3, #4, #5, and #6 arranged in an array; the second group of eddy current detection coils includes eddy current detection coils #10, #11, #12, #13, #14, #15, #16, #17, #18, and #19 arranged in an array; and the third group of eddy current detection coils includes eddy current detection coils #7, #8, and #9 arranged in an array.

[0008] Optionally, the U-shaped elastic frame is made of spring steel.

[0009] The rail weld eddy current detection probe provided by this utility model includes multiple eddy current detection coils, probe wires, a U-shaped elastic frame, and a handle. First, the first set of eddy current detection coils is installed on the side of the first sidewall facing the second sidewall, and the second set of eddy current detection coils is installed on the side of the second sidewall facing the first sidewall. Then, the handle is installed on the bottom of the groove of the U-shaped elastic frame, on the side facing away from the open end of the U-shaped elastic frame. One end of the probe wire is passed through the handle and communicates with all multiple eddy current detection coils. The other end of the probe wire is used to connect with an eddy current flaw detector. Finally, in use, the first set of eddy current detection coils is attached to the inclined surface of the rail base, the second set of eddy current detection coils is attached to the lower surface of the rail base, and the third set of eddy current detection coils is attached to the side of the rail base. The U-shaped elastic frame allows the probe to better fit the weld on the rail base, improving the accuracy and efficiency of weld detection results. Attached Figure Description

[0010] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of this utility model, wherein:

[0011] Figure 1 This is a schematic diagram of the installation structure between the rail weld eddy current detection probe and the rail according to an embodiment of the present invention.

[0012] Figure 2 A schematic diagram of a rail weld with weld beads;

[0013] Figure 3 This is a schematic diagram of a rail weld without weld beads.

[0014] Explanation of reference numerals in the attached figures:

[0015] 1: First set of eddy current detection coils; 2: Second set of eddy current detection coils; 3: Third set of eddy current detection coils; 4: Probe wire; 5: U-shaped elastic frame; 6: Handle; 7: First side wall; 8: Second side wall; 9: Groove bottom; 10: Roller; 11: Upper inclined surface of rail bottom; 12: Side of rail bottom; 13: Lower surface of rail bottom. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0017] like Figure 1 As shown, the rail weld eddy current detection probe provided by this utility model includes multiple eddy current detection coils, a probe wire 4, a U-shaped elastic frame 5, and a handle 6. The multiple eddy current detection coils are divided into a first group of eddy current detection coils 1, a second group of eddy current detection coils 2, and a third group of eddy current detection coils 3. The U-shaped elastic frame 5 includes a groove bottom 9 and a first sidewall 7 and a second sidewall 8 arranged opposite each other. The included angle between the first sidewall 7 and the second sidewall 8 is adjustable. The first group of eddy current detection coils 1 is installed on the side of the first sidewall 7 facing the second sidewall 8. The first group of eddy current detection coils 1 is used for... The second set of eddy current detection coils 2 is installed on the side of the second sidewall 8 facing the first sidewall 7, which is in contact with the inclined surface 11 of the rail bottom. The second set of eddy current detection coils 2 is used to contact the lower surface 13 of the rail bottom. The third set of eddy current detection coils 3 is installed on the bottom 9 of the groove, which is used to contact the side 12 of the rail bottom. The handle 6 is installed on the side of the bottom 9 of the U-shaped elastic frame 5 facing away from the opening end of the U-shaped elastic frame 5. One end of the probe wire 4 passes through the handle 6 and is connected to multiple eddy current detection coils. The other end of the probe wire 4 is used to connect to the eddy current flaw detector.

[0018] The rail weld eddy current detection probe provided by this utility model includes multiple eddy current detection coils, probe wire 4, U-shaped elastic frame 5, and handle 6. First, the first set of eddy current detection coils 1 is installed on the side of the first side wall 7 facing the second side wall 8, and the second set of eddy current detection coils 2 is installed on the side of the second side wall 8 facing the first side wall 7. Then, the handle 6 is installed on the side of the groove bottom 9 of the U-shaped elastic frame 5 facing away from the open end of the U-shaped elastic frame 5. One end of the probe wire 4 is passed through the handle 6 and communicates with multiple eddy current detection coils. The other end of the probe wire 4 is used to connect with the eddy current flaw detector. Finally, in use, the first set of eddy current detection coils 1 is attached to the upper inclined surface 11 of the rail base, the second set of eddy current detection coils 2 is attached to the lower surface 13 of the rail base, and the third set of eddy current detection coils 3 is attached to the side edge 12 of the rail base. The U-shaped elastic frame 5 allows the probe to better fit on the weld of the rail base, improving the accuracy and efficiency of weld detection results.

[0019] like Figure 1 As shown, it also includes two rollers 10, which are rotatably mounted at both ends of the first sidewall 7 and the second sidewall 8, respectively. In this embodiment, the rollers 10 can better drive the multiple eddy current detection coils to slide on the inclined surface 11 and the lower surface 13 of the rail bottom, improving the ease of use of the rail weld eddy current detection probe.

[0020] like Figure 1 As shown, the first group of eddy current detection coils 1 includes eddy current detection coils 1#, 2#, 3#, 4#, 5#, and 6# arranged in an array. The second group of eddy current detection coils 2 includes eddy current detection coils 10#, 11#, 12#, 13#, 14#, 15#, 16#, 17#, 18#, and 19# arranged in an array. The third group of eddy current detection coils 3 includes eddy current detection coils 7#, 8#, and 9# arranged in an array. In this embodiment, multiple eddy current detection coils are respectively attached to the upper inclined surface 11, the side edge 12, and the lower surface 13 of the rail base. When the array probe extends from the side of the rail to contact the upper inclined surface 11 and the lower surface 13 of the rail base, it can ensure that the two rollers 10 are always in contact with the surface, reducing interference signals to the detection results due to the increase or change of lifting, and improving the detection accuracy of the eddy current detection probe for rail welds.

[0021] In one embodiment of this utility model, the U-shaped elastic frame 5 is made of spring steel. Spring steel not only has excellent elastic properties, but also good wear resistance and corrosion resistance, which increases the service life of the U-shaped elastic frame 5 and improves the service life of the eddy current detection probe for rail welds.

[0022] In one embodiment of this utility model, the operating steps for using a rail weld eddy current testing probe to inspect the rail bottom weld are as follows: Connect the probe wire 4 to the eddy current flaw detector. When inspecting a weld with weld beads (e.g.) Figure 2 As shown), the two rollers 10 on the rail weld eddy current detection probe enter along the root of the weld bead until the No. 8 detection coil approaches the side 12 of the rail base, completing the single-sided scanning of a single weld bead position. The other side is operated in the same way; when inspecting welds without weld beads (such as...), Figure 3 As shown, first, insert the eddy current detection probe of the rail weld directly into the rail base until the No. 8 detection coil is attached to the side 12 of the rail base. Then, scan along the longitudinal direction of the rail to complete the scan of the weld without weld beads. The detection method for ends A and B is the same; simply repeat the above process. The rail base weld can be completed in two scans, resulting in high detection efficiency.

[0023] It should be noted that the eddy current flaw detector emits sinusoidal AC signals that excite multiple eddy current detection coils, and simultaneously picks up the detection signals from multiple eddy current detection coils. The detection signals are processed by hardware and software signals, and the software system analyzes and displays the defect image signals, thus completing the entire weld inspection process.

[0024] The rail weld eddy current detection probe provided by this utility model includes multiple eddy current detection coils, probe wire 4, U-shaped elastic frame 5, and handle 6. First, the first set of eddy current detection coils 1 is installed on the side of the first side wall 7 facing the second side wall 8, and the second set of eddy current detection coils 2 is installed on the side of the second side wall 8 facing the first side wall 7. Then, the handle 6 is installed on the side of the groove bottom 9 of the U-shaped elastic frame 5 facing away from the open end of the U-shaped elastic frame 5. One end of the probe wire 4 is passed through the handle 6 and communicates with multiple eddy current detection coils. The other end of the probe wire 4 is used to connect with the eddy current flaw detector. Finally, in use, the first set of eddy current detection coils 1 is attached to the upper inclined surface 11 of the rail base, the second set of eddy current detection coils 2 is attached to the lower surface 13 of the rail base, and the third set of eddy current detection coils 3 is attached to the side edge 12 of the rail base. The U-shaped elastic frame 5 allows the probe to better fit on the weld of the rail base, improving the accuracy and efficiency of weld detection results.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A probe for eddy current detection of rail welds, characterized in that, Includes multiple eddy current detection coils, probe wires, a U-shaped elastic frame, and a handle, wherein: The plurality of eddy current detection coils are divided into a first group of eddy current detection coils, a second group of eddy current detection coils and a third group of eddy current detection coils; The U-shaped elastic frame includes a groove bottom and a first sidewall and a second sidewall arranged opposite to each other. The included angle between the first sidewall and the second sidewall is adjustable. A first set of eddy current detection coils is installed on the side of the first sidewall facing the second sidewall. The first set of eddy current detection coils is used to fit against the inclined surface on the bottom of the rail. A second set of eddy current detection coils is installed on the side of the second sidewall facing the first sidewall. The second set of eddy current detection coils is used to fit against the lower surface of the bottom of the rail. A third set of eddy current detection coils is installed on the groove bottom. The third set of eddy current detection coils is used to fit against the side of the bottom of the rail. The handle is installed on the bottom of the groove of the U-shaped elastic frame on the side facing away from the open end of the U-shaped elastic frame; One end of the probe wire passes through the handle and is connected to the plurality of eddy current detection coils. The other end of the probe wire is used to connect to the eddy current flaw detector.

2. The eddy current detection probe for rail welds according to claim 1, characterized in that, It also includes two rollers, which are rotatably mounted at both ends of the first sidewall and the second sidewall, respectively.

3. The eddy current detection probe for rail welds according to claim 1, characterized in that, The first group of eddy current detection coils includes eddy current detection coils #1, #2, #3, #4, #5, and #6 arranged in an array. The second group of eddy current detection coils includes eddy current detection coils #10, #11, #12, #13, #14, #15, #16, #17, #18, and #19 arranged in an array. The third group of eddy current detection coils includes eddy current detection coils #7, #8, and #9 arranged in an array.

4. The eddy current detection probe for rail welds according to claim 1, characterized in that, The U-shaped elastic frame is made of spring steel.

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