A railway track crack detection device

Abstract

This application relates to the technical field of railway track crack detection, and in particular to a railway track crack detection device. The device includes a central plate, a first connecting arc-shaped rod fixedly disposed at the center of the front side of the central plate, a central sleeve fixedly disposed at the end of the first connecting arc-shaped rod away from the central plate, a support sleeve fixedly disposed at the top end of the central sleeve, a liquid tube fixedly inserted at the center of the top of the support sleeve, and valve tubes fixedly inserted and connected to both ends of the bottom of the liquid tube. This invention utilizes a scanning tube installed inside the snap-fit ​​sleeve and components such as an ultrasonic flaw detector mounted above it. It leverages the propagation characteristics of ultrasonic waves in different media; when ultrasonic waves encounter cracks, they are reflected, refracted, and attenuated. By receiving and analyzing the reflected echo signals, the location, depth, and size of the crack can be determined, enabling the detection of internal defects. It is sensitive to minute cracks and has a fast detection speed, making it suitable for batch detection.

Description

Technical Field

[0001] This application relates to the technical field of railway track crack detection, and in particular to a railway track crack detection device. Background Technology

[0002] Railway tracks are a crucial component of railway infrastructure, guiding locomotives and rolling stock, directly bearing their loads, and distributing those loads to the roadbed or bridge and tunnel structures. Railway track crack detection is a key technology for ensuring safe railway operation. Its purpose is to promptly identify cracks and defects in the track structure, preventing serious accidents such as track breakage and train derailment caused by crack propagation.

[0003] Existing railway track crack detection methods primarily rely on visual inspection and sound analysis (such as tapping the track with an inspection hammer to determine the presence of internal cracks). This approach is inefficient, prone to missed detections, and struggles to uncover hidden cracks or early-stage minute defects. Eddy current testing, on the other hand, uses coils to generate alternating magnetic fields that induce eddy currents on the track surface. When cracks are present, the distribution and size of these eddy currents change, and these changes are detected to identify the cracks. However, this method is affected by the skin effect, limiting its ability to detect deep defects, and is susceptible to interference from metal surface oxide scale and oil contaminants.

[0004] In view of the above situation, this utility model is hereby proposed! Utility Model Content

[0005] In order to solve the problems mentioned in the background art, this application provides a railway track crack detection device.

[0006] This application provides a railway track crack detection device, which adopts the following technical solution: it includes a central plate, a first connecting arc-shaped rod is fixedly installed in the middle of the front side of the central plate, a central sleeve is fixedly installed at the end of the first connecting arc-shaped rod away from the central plate, a support sleeve is fixedly installed at the top end of the central sleeve, a liquid tube is fixedly inserted into the center of the top of the support sleeve, valve tubes are fixedly inserted into and communicate with the bottom of the liquid tube at both ends, a brush is fixedly installed at the top of the bottom of the valve tube penetrating the inner slide tube, the top of the brush is fixedly connected to the bottom of the inner slide tube, and the end of the inner slide tube away from the brush is slidably inserted into the inner wall of the central sleeve.

[0007] An internal sliding plate is slidably inserted into the inner wall of one end of the middle plate. A snap-fit ​​sleeve is fixedly installed at the end of the internal sliding plate away from the middle plate. A diagonal rod is rotatably installed on one side of the top of the snap-fit ​​sleeve through a rotating groove. A rotating frame is rotatably installed at the end of the diagonal rod away from the rotating groove. A top plate is fixedly installed on the top of the rotating frame. A hydraulic telescopic rod is fixedly installed in the middle of the lower surface of the top plate through a pad. A top sliding plate is fixedly installed at the bottom of the hydraulic telescopic rod. The bottom of the top sliding plate is slidably connected to the top of the snap-fit ​​sleeve. An ultrasonic flaw detector is fixedly installed at the bottom of the top plate.

[0008] Optionally, a connecting frame plate is fixedly installed in the middle of the outer side of the middle sleeve. The connecting frame plate is set in an "L" shape, and a connecting hole is fixedly installed on the top of the connecting frame plate. The front end of the connecting frame plate is located on the front side of the front plate.

[0009] Optionally, the two ends and the middle of the liquid tube are retractable, with the two ends of the liquid tube slidingly inserted into the middle.

[0010] Optionally, the snap-fit ​​sleeve consists of two semi-circular snap-fit ​​sleeves. Limiting rods are slidably inserted into the two ends of the inner top of the two snap-fit ​​sleeves. A scanning tube is provided on the inner wall of the snap-fit ​​sleeve. The top of the scanning tube is electrically connected to one end of the telescopic power cord. The end of the telescopic power cord away from the scanning tube is electrically connected to the ultrasonic flaw detector. A limiting crossbar is fixedly provided at one end of the outer side of the snap-fit ​​sleeve. The other end of the limiting crossbar is slidably inserted into the outer side of one end of the middle plate.

[0011] Optionally, the top slide plate has a groove in the middle and a movable plate is slidably mounted on its inner wall. One side of the bottom of the movable plate is fixedly mounted on one end of the top inner side of the snap-fit ​​sleeve plate. There are two top slide plates, and the middle of both ends of each slide plate is slidably mounted on the snap-fit ​​sleeve plate via the movable plate.

[0012] Optionally, both ends of the ultrasonic flaw detector are provided with limit sleeves, the middle of the limit sleeve is provided with a sliding groove and a square moving block is slidably provided on its inner wall, and the middle of the square moving block is sleeved on the top outside of the scanning tube.

[0013] Optionally, a front plate is fixedly installed on the front side of the end of the internal slide tube away from the middle sleeve. A coating roller is rotatably installed on the bottom of the front plate through a connecting frame. The coating roller is located in front of the coating brush and is lower than the coating brush. A collar is fixedly installed in the middle of the internal slide tube. A second connecting arc rod is fixedly installed on the outside of the collar. The end of the second connecting arc rod away from the collar is fixedly installed on the outside of one end of the internal sliding plate.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] 1. This utility model utilizes the propagation characteristics of ultrasonic waves in different media. When ultrasonic waves encounter cracks, they will be reflected, refracted, and attenuated. By receiving and analyzing the reflected echo signals, the location, depth, and size of the crack can be determined, thus detecting internal defects. It is sensitive to tiny cracks and has a fast detection speed, making it suitable for batch testing.

[0016] 2. This utility model, by setting up components such as a liquid pipe, a brush, and a roller, applies a coupling agent (such as machine oil or water) to the rail surface, ensuring good contact between the probe and the rail surface, eliminating air, improving detection accuracy, reducing interface reflection, enhancing signal quality, and simultaneously providing lubrication to protect the probe and equipment, reducing frictional resistance between the probe and the rail, making probe movement smoother, extending probe lifespan, and preventing scratches on the rail surface. It also improves detection efficiency and coverage. Proper selection and use of the coupling agent can significantly improve detection sensitivity, accuracy, and efficiency, ensuring railway operation safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure in the embodiments of this application;

[0018] Figure 2 This is a three-dimensional exploded view of the snap-fit ​​sleeve and diagonal bar in an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the inner side of the middle sleeve in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the front structure in an embodiment of this application;

[0021] Figure 5 This is a schematic diagram of the left-side structure in an embodiment of this application;

[0022] Figure 6 This is a schematic diagram of the rear structure in an embodiment of this application;

[0023] Figure 7 This is a three-dimensional structural diagram of the scanning tube and the retractable power cord in an embodiment of this application.

[0024] Reference numerals: 1. Middle plate; 2. Liquid pipe; 3. Support sleeve; 4. Application brush; 5. Connecting frame plate; 6. Middle sleeve; 7. Internal sliding tube; 8. Application roller; 9. Valve pipe; 10. Snap-fit ​​sleeve; 11. Top sliding plate; 12. Limiting sleeve; 13. Diagonal bar; 14. Top plate; 15. Front plate; 16. Limiting crossbar; 17. First connecting arc-shaped rod; 18. Internal sliding plate; 19. Second connecting arc-shaped rod; 20. Square moving block; 21. Moving plate; 22. Ultrasonic flaw detector; 23. Rotating frame; 24. Hydraulic telescopic rod; 25. Scanning tube; 26. Telescopic power cord. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0026] This application discloses a railway track crack detection device. For example... Figure 1 As shown, the device includes a central plate 1. A first connecting arc-shaped rod 17 is fixedly installed in the middle of the front side of the central plate 1. A central sleeve 6 is fixedly installed at the end of the first connecting arc-shaped rod 17 away from the central plate 1. A connecting frame plate 5 is fixedly installed in the middle of the outer side of the central sleeve 6. The device is connected to an external power device through the connecting frame plate 5, so that the device can move on the surface of the rail. The connecting frame plate 5 is set in an "L" shape. A connecting hole is fixedly installed on the top of the connecting frame plate 5. The front end of the connecting frame plate 5 is located in front of the front plate 15.

[0027] Please see Figure 1 A support sleeve 3 is fixedly installed at one end of the top of the middle sleeve 6. A liquid tube 2 is fixedly inserted into the center of the top of the support sleeve 3. The two ends of the liquid tube 2 are retractable to the middle. The two ends of the liquid tube 2 are slidably inserted into the middle. By adding a coupling agent inside the liquid tube 2, the effective conduction of sound energy is ensured. At the same time, lubrication, anti-interference and environmental adaptability are taken into account. In the detection of cracks in railway tracks, the reasonable selection and use of coupling agent can significantly improve the detection sensitivity, accuracy and efficiency, and ensure the safety of railway operation.

[0028] Please see Figure 1 and Figure 3Both ends of the liquid tube 2 are fixedly connected to valve tubes 9 and communicate with them. A brush 4 is fixedly installed at the top of one end of the valve tube 9, which passes through the inner slide tube 7. The top of the brush 4 is fixedly connected to the bottom of the inner slide tube 7. A front plate 15 is fixedly installed on the front side of the end of the inner slide tube 7 away from the middle sleeve 6. A brush roller 8 is rotatably installed on the bottom of the front plate 15 through a connecting bracket. The brush roller 8 is located in front of the brush 4 and is lower than the brush 4. A collar is fixedly installed in the middle of the inner slide tube 7. A second connecting arc is fixedly installed on the outside of the collar. The second connecting arc rod 19 ensures that the internal slide tube 7 can slide smoothly. The end of the second connecting arc rod 19 away from the collar is fixedly set on the outer side of one end of the internal sliding plate 18. When the equipment moves on the track, the coating roller 8 contacts the track surface. Not only does the coating roller 8 engage with the upper surface of the track, enabling the equipment to move stably on the rail surface, but the coating roller 8 also provides support for the height between the equipment and the rail. The end of the internal slide tube 7 away from the coating brush 4 is slidably inserted into the inner wall of one end of the middle sleeve 6.

[0029] Please see Figure 3 An internal sliding plate 18 is slidably inserted into the inner wall of one end of the middle plate 1. A snap-fit ​​sleeve 10 is fixedly installed at the end of the internal sliding plate 18 away from the middle plate 1. The snap-fit ​​sleeve 10 consists of two semi-circular snap-fit ​​plates. By fitting the two semi-circular snap-fit ​​sleeves 10 onto both sides of the rail, the surface of the rail can be fully covered, avoiding detection loopholes. Limiting rods are slidably inserted into the two ends of the top inner side of the two snap-fit ​​sleeves 10. A scanning tube 25 is provided on the inner wall of the snap-fit ​​sleeve 10. The top of the scanning tube 25 is connected to one end of the telescopic power cord 26. Electrically connected, the end of the telescopic power cord 26 away from the scanning tube 25 is electrically connected to the ultrasonic flaw detector 22. The scanning tube 25 scans the outside of the rail and transmits the scanned information to the inside of the ultrasonic flaw detector 22. The data is then transmitted to the staff to determine whether there are cracks in the rail. A limit bar 16 is fixedly installed at one end of the outer side of the locking sleeve 10. The other end of the limit bar 16 is slidably inserted into the outer side of one end of the middle plate 1. Under the action of the limit bar 16, the two sets of locking sleeves 10 are ensured to move smoothly.

[0030] Please see Figure 1 river Figure 2A diagonal rod 13 is rotatably mounted on one side of the top of the snap-fit ​​sleeve 10 via a rotating groove. A rotating frame 23 is rotatably mounted on the end of the diagonal rod 13 away from the rotating groove. A top plate 14 is fixedly mounted on the top of the rotating frame 23. A hydraulic telescopic rod 24 is fixedly mounted on the middle of the lower surface of the top plate 14 via a pad. A top sliding plate 11 is fixedly mounted on the bottom of the hydraulic telescopic rod 24. A sliding groove is provided in the middle of the top sliding plate 11, and a movable plate 21 is slidably mounted on its inner wall. One side of the bottom of the movable plate 21 is fixedly mounted on one end of the top inner side of the snap-fit ​​sleeve 10. There are two top sliding plates 11, and the snap-fit ​​sleeves 10 are slidably mounted on the middle of both ends of the top sliding plates 11 via the movable plates 21. When the movable plates 21 are subjected to external force, they slide inside the sliding groove in the middle of the top sliding plate 11, ensuring that the two sets of snap-fit ​​sleeves 10 below can move smoothly. The bottom of the top sliding plate 11 is slidably connected to the top of the snap-fit ​​sleeve 10.

[0031] Please see Figure 2 An ultrasonic flaw detector 22 is fixedly installed at the bottom of the top plate 14. Both ends of the ultrasonic flaw detector 22 are provided with limiting sleeves 12. A sliding groove is provided in the middle of the limiting sleeve 12 and a square moving block 20 is slidably installed on its inner wall. The middle of the square moving block 20 is sleeved on the top outer side of the scanning tube 25. The square moving block 20 slides inside the limiting sleeve 12, and at the same time changes the length of the internal telescopic power cord 26 to avoid the power cord breaking when the locking sleeve 10 drives the internal scanning tube 25 to change position.

[0032] The implementation principle of a railway track crack detection device according to this application embodiment is as follows: During use, two coating rollers 8 are placed on the rail surface and connected to an external power source via a connecting frame plate 5, allowing the device to move on the rail surface. The valve pipe 9 below the liquid pipe 2 is opened, allowing the internal coupling agent to flow into the coating brush 4. Under the action of the coating brush 4, the coupling agent is applied to the rail surface, filling the tiny gaps between the scanning tube 25 and the rail surface, eliminating air, and maximizing the transmission of ultrasonic energy into the rail interior to ensure the accuracy of the detection signal. By activating the hydraulic telescopic rod 24, the two sets of inclined rods 13 are positioned relative to or towards each other under the action of the top plate 14, causing the two lower... The snap-fit ​​sleeve 10 can be fitted onto both sides of the rail. When the ultrasonic flaw detector 22 below is activated, the scanning tube 25 inside the snap-fit ​​sleeve 10 scans the rail surface. Utilizing the propagation characteristics of ultrasonic waves in different media, when ultrasonic waves encounter cracks, they will be reflected, refracted, and attenuated. By receiving and analyzing the reflected echo signals, the location, depth, and size of the crack can be determined, and internal defects can be detected. It is sensitive to tiny cracks. The detection speed is relatively fast and it is suitable for batch testing. There is no need to damage the rail surface or disassemble the parts. The ultrasonic probe can be directly contacted with the rail surface through a coupling agent (such as machine oil or water) to complete the test, avoiding secondary damage to the rail's load-bearing capacity and service performance.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A railway track crack detection device, comprising a central plate (1), characterized in that: A first connecting arc rod (17) is fixedly installed in the middle of the front side of the middle plate (1). A middle sleeve (6) is fixedly installed at the end of the first connecting arc rod (17) away from the middle plate (1). A support sleeve (3) is fixedly installed at the top end of the middle sleeve (6). A liquid tube (2) is fixedly inserted at the center of the top of the support sleeve (3). A valve tube (9) is fixedly inserted at both ends of the bottom of the liquid tube (2) and communicates with it. A brush (4) is fixedly installed at the top of one end of the valve tube (9) through the bottom of the inner slide tube (7). The top of the brush (4) is fixedly connected to the bottom of the inner slide tube (7). The end of the inner slide tube (7) away from the brush (4) is slidably inserted into the inner wall of one end of the middle sleeve (6). An internal sliding plate (18) is slidably inserted into the inner wall of one end of the middle plate (1). A snap-fit ​​sleeve plate (10) is fixedly installed at the end of the internal sliding plate (18) away from the middle plate (1). A diagonal rod (13) is rotatably installed on one side of the top of the snap-fit ​​sleeve plate (10) through a rotating groove. A rotating frame (23) is rotatably installed at the end of the diagonal rod (13) away from the rotating groove. A top plate (14) is fixedly installed on the top of the rotating frame (23). A hydraulic telescopic rod (24) is fixedly installed in the middle of the lower surface of the top plate (14) through a pad. A top sliding plate (11) is fixedly installed at the bottom of the hydraulic telescopic rod (24). The bottom of the top sliding plate (11) is slidably connected to the top of the snap-fit ​​sleeve plate (10). An ultrasonic flaw detector (22) is fixedly installed at the bottom of the top plate (14).

2. The railway track crack detection apparatus of claim 1, wherein: A connecting frame plate (5) is fixedly installed in the middle of the outer side of the middle sleeve (6). The connecting frame plate (5) is set in an "L" shape. A connecting hole is fixedly installed on the top of the connecting frame plate (5). The front end of the connecting frame plate (5) is located on the front side of the front plate (15).

3. The railroad track crack detection apparatus of claim 1, wherein: The liquid tube (2) is retractable at both ends and in the middle, with the two ends of the liquid tube (2) slidably inserted into the middle.

4. The railroad track crack detection apparatus of claim 1, wherein: The snap-fit ​​sleeve (10) is composed of two semi-circular snap-fit ​​sleeves. The two ends of the top inner side of the two snap-fit ​​sleeves (10) are slidably inserted with limit rods. The inner wall of the snap-fit ​​sleeve (10) is provided with a scanning tube. The top of the scanning tube (25) is electrically connected to one end of the telescopic power cord (26). The end of the telescopic power cord (26) away from the scanning tube (25) is electrically connected to the ultrasonic flaw detector (22). One end of the outer side of the snap-fit ​​sleeve (10) is fixedly provided with a limit crossbar (16). The other end of the limit crossbar (16) is slidably inserted into the outer side of one end of the middle plate (1).

5. The railroad track crack detection apparatus of claim 1, wherein: The top slide plate (11) has a groove in the middle and a movable plate (21) is slidably provided on its inner wall. One side of the bottom of the movable plate (21) is fixedly provided on one end of the top inner side of the snap-fit ​​sleeve plate (10). There are two top slide plates (11) and the middle of both ends of them are slidably provided with snap-fit ​​sleeve plates (10) through the movable plate (21).

6. The railroad track crack detection apparatus of claim 1, wherein: Both ends of the ultrasonic flaw detector (22) are provided with limiting sleeves (12). The middle part of the limiting sleeve (12) is provided with a sliding groove and a square moving block (20) is slidably provided on its inner wall. The middle part of the square moving block (20) is sleeved on the top outer side of the scanning tube (25).

7. The railroad track crack detection apparatus of claim 1, wherein: A front plate (15) is fixedly installed on the front side of the inner slide tube (7) away from the middle sleeve (6). A coating roller (8) is rotatably installed on the bottom of the front plate (15) through a connecting frame. The coating roller (8) is located in front of the coating brush (4) and is set lower than the coating brush (4). A collar is fixedly installed in the middle of the inner slide tube (7). A second connecting arc rod (19) is fixedly installed on the outside of the collar. The end of the second connecting arc rod (19) away from the collar is fixedly installed on the outside of one end of the inner slide plate (18).

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