An online intelligent rail flaw detection device and its usage method

Abstract

The present invention discloses an on-line intelligent rail flaw detection device and its usage method, including a base and a rail. Walking wheels are rotatably installed on both sides of the front and back of the base. A liquid storage tank is fixedly connected to the base. An installation frame is fixedly connected to the right side of the liquid storage tank, and a controller is fixedly connected to the installation frame. Grooves are formed on both sides of the base, and rollers cooperating with the rail are rotatably connected in the grooves. A support plate is fixedly connected to the left side of the base, and a locking mechanism is arranged on the support plate. A bracket is rotatably connected to the left side of the inner cavity of the base, and a probe capable of flaw detecting the rail is rotatably connected to the bottom of the bracket. Two groups of first springs are symmetrically arranged along the front and back directions on the left side of the bracket, and one end of the first spring is fixedly connected to the base. The present invention utilizes the locking mechanism to quickly limit the position of the device, avoid the displacement of the device during fixed-point flaw detection, and improve the accuracy of the ultrasonic probe for flaw detecting the rail.

Description

Technical Field

[0001] The present invention relates to the technical field of rail flaw detection, and specifically to an on-line intelligent rail flaw detection device and its usage method. Background Technique

[0002] Rail flaw detection refers to detecting hidden damages inside the rail or tiny cracks on the surface, especially the rail damages covered by the splints. When detecting the rail for flaws, mostly an intelligent flaw detection device is used. The ultrasonic probe inside the intelligent flaw detection device emits ultrasonic waves into the rail with nuclear damage, cracks or other damages. The ultrasonic waves are blocked at the contact section between the solid and the air, generating reflected waves, and thus the damages existing inside the rail can be detected. Also, according to the time interval between the transmitted wave and the reflected wave and its propagation speed in the rail, the depth of the damage can be judged.

[0003] However, the locking effect of the traditional on-line intelligent rail flaw detection device is very poor. When it is necessary to perform fixed-point flaw detection on the damaged rail, since the whole device can slide on the rail and a large amount of coupling agent is also smeared on the rail, the device is very likely to move during fixed-point flaw detection, thus easily affecting the accuracy of rail flaw detection and posing a great potential safety hazard. Therefore, an on-line intelligent rail flaw detection device and its usage method are proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide an on-line intelligent rail flaw detection device and its usage method to solve the problem of poor locking effect of the traditional on-line intelligent rail flaw detection device, which easily causes the device to move during positioning flaw detection as mentioned in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An on-line intelligent rail flaw detection device, including a base and a rail. Walking wheels are rotatably installed on both sides of the front and back of the base. A liquid storage tank is fixedly connected to the base. An installation frame is fixedly connected to the right side of the liquid storage tank. A controller is fixedly connected to the installation frame. Grooves are opened on both sides of the base, and rollers cooperating with the rail are rotatably connected in the grooves. A support plate is fixedly connected to the left side of the base. A locking mechanism is arranged on the support plate. A bracket is rotatably connected to the left side of the inner cavity of the base. A probe capable of detecting flaws in the rail is rotatably connected to the bottom of the bracket. Two groups of first springs are symmetrically arranged along the front and back directions on the left side of the bracket, and one end of the first spring is fixedly connected to the base. A water pump is arranged on the liquid storage tank. The liquid inlet end of the water pump passes through a pipeline into the liquid storage tank. The liquid outlet end of the water pump is communicated with a connecting frame. A square pipe is inserted into the left side of the top of the base. Three vertical pipes are communicated with the square pipe along the front and back directions, and the top of the vertical pipes is communicated with the connecting frame.

[0006] Preferably, the locking mechanism includes two groups of fixing frames. One side of the two groups of fixing frames close to each other is fixedly connected to the front and back of the support plate. A connecting shaft is horizontally rotatably connected inside the fixing frame. A first gear is fixedly connected to the connecting shaft and is located inside the fixing frame. The bottom of the support plate is symmetrically rotatably connected with guide plates in the front-back direction. One end of the guide plate away from the support plate is rotatably connected with an electromagnet. Both sides of the electromagnet are fixedly connected with magnets through connecting plates. The sides of the electromagnet and the magnets close to the rail are adsorbed on the rail. An arc-shaped tooth plate that can mesh with the first gear is fixedly connected to the side of the guide plates away from each other. One end of the two connecting shafts is fixedly connected with a first pulley and a second gear respectively in the front-back direction. A protective cover is fixedly connected to the support plate. A fixed shaft is rotatably connected to the back of the left side of the protective cover. A third gear and a second pulley are fixedly connected to the fixed shaft in the left-right direction in sequence. The surfaces of the first pulley and the second pulley are connected by a belt in a transmission manner. The sides of the second gear and the third gear close to each other are meshed. A first motor is fixedly connected to one side of the protective cover through a mounting frame, and the output end of the first motor is fixedly connected to the fixed shaft.

[0007] Preferably, an L-shaped scraper is inserted into the right side of the top of the support plate, and the bottom of the L-shaped scraper fits on the rail. Three vertical rods are fixedly connected to the right side of the top of the support plate in the front-back direction in sequence. The top ends of the vertical rods penetrate through the L-shaped scraper and are fixedly connected with limit blocks. A second spring is wound around the vertical rod. One end of the second spring is fixedly connected to the support plate, and the other end of the second spring is fixedly connected to the L-shaped scraper.

[0008] Preferably, a second motor is fixedly connected to the left side of the top of the protective cover. The output end of the second motor penetrates through the support plate and is fixedly connected with a cleaning brush that can remove impurities on the rail. The cleaning brush is located on the left side of the L-shaped scraper.

[0009] Preferably, vertical grooves for cooperating with the arc-shaped tooth plate are opened on the front and back of the protective cover. Limit grooves for cooperating with the arc-shaped tooth plate are symmetrically opened on the support plate in the front-back direction. Two groups of pull rods are symmetrically arranged on the top of the right side of the protective cover in the front-back direction, and one end of the pull rod is fixedly connected to the base.

[0010] Preferably, a placement box is fixedly connected to the right side of the top of the base. A small storage battery is arranged on the base, and the top of the small storage battery is arranged on the right side of the bottom of the mounting frame.

[0011] Preferably, an arc-shaped groove for cooperating with the arc-shaped tooth plate is opened inside the fixing frame.

[0012] A usage method of an on-line intelligent rail flaw detection device includes the following steps:

[0013] S1. The user places the device on the rail. At this time, the L-shaped scraper will come into contact with the rail in advance. As the device continues to move downward, the L-shaped scraper will be continuously squeezed, and the second spring will be stretched until the roller is clamped on the rail. Subsequently, the user turns on the second motor and the water pump through the controller. The second motor can drive the cleaning brush to rotate rapidly to initially remove the impurities on the rail. At this time, the water pump transfers the coupling agent in the liquid storage tank to the square pipe through the connecting frame and the vertical pipe, and then the coupling agent can be quickly coated on the rail through the square pipe;

[0014] S2. Subsequently, the user pushes the device, which can drive the probe and the L-shaped scraper to move synchronously. The ultrasonic probe is used to quickly detect the rail for defects. At the same time, using the elastic rebound of the second spring, the L-shaped scraper can always fit on the rail and quickly remove the attachments on the rail to avoid affecting the accuracy of the probe when detecting the rail for defects;

[0015] S3. When fixed-point detection is required, the user turns on the first motor. The first motor can drive the third gear and the second pulley to rotate synchronously. Thus, with the assistance of the second gear and the first pulley, the two connecting shafts and the first gear can be driven to rotate synchronously in the opposite direction, and then the two arc-shaped tooth plates can be driven to rotate synchronously in the opposite direction. Since both ends of the guide plate can rotate, the arc-shaped tooth plate can drive the guide plate to swing until the electromagnet and the magnet are in contact with the rail. At this time, the magnet can quickly adsorb on the rail to position the electromagnet. At this time, the user energizes the electromagnet through the controller to quickly adsorb the electromagnet on the rail, thereby quickly limiting the device to prevent the device from displacing during fixed-point detection, improving the accuracy of the ultrasonic probe when detecting the rail for defects. At the same time, the user can use the ultrasonic probe to perform fixed-point detection on the rail.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In the present invention, by setting the locking mechanism and using the first motor as the driving source, the two arc-shaped tooth plates can be driven to rotate synchronously in the opposite direction. Since both ends of the guide plate can rotate, the arc-shaped tooth plate can drive the guide plate to swing until the electromagnet and the magnet are in contact with the rail. At this time, the magnet can quickly adsorb on the rail to position the electromagnet. At this time, with the assistance of the controller, the electromagnet is energized to facilitate quickly adsorbing the electromagnet on the rail, thereby quickly limiting the device to prevent the device from displacing during fixed-point detection and improving the accuracy of the ultrasonic probe when detecting the rail for defects.

[0018] 2. In the present invention, by providing a second motor and a cleaning brush, the second motor can drive the cleaning brush to rotate rapidly, which is convenient for preliminary cleaning of impurities on the rails. At the same time, by providing an L-shaped scraper and utilizing the elastic rebound of the second spring, the L-shaped scraper can always fit on the rails, so that when the device moves, the L-shaped scraper can be pushed to move synchronously and the attachments on the rails can be quickly cleaned, thereby avoiding affecting the accuracy of the probe in detecting flaws in the rails.

[0019] 3. In the present invention, vertical grooves and limit grooves are provided to facilitate the unimpeded swinging of the auxiliary arc-shaped toothed plate. At the same time, the design of the pull rod improves the overall strength of the shield, thereby improving the stability of the support plate and avoiding excessive parts loaded on the support plate that are easy to break.

[0020] The present invention utilizes a locking mechanism to quickly limit the position of the device, thereby preventing the device from shifting during fixed-point flaw detection, and improving the accuracy of the ultrasonic probe in detecting flaws on the rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an online intelligent rail flaw detection device of the present invention;

[0022] Figure 2 This is a bottom view of the structure of an online intelligent rail flaw detection device of the present invention;

[0023] Figure 3 This is a structural rear view of an online intelligent rail flaw detection device of the present invention;

[0024] Figure 4 for Figure 3 A magnified view of the structure at center A;

[0025] Figure 5 It is a structural stereogram of the locking mechanism of the present invention;

[0026] Figure 6 A bottom view of the structure of the support plate of the present invention;

[0027] Figure 7 It is a structural explosion diagram of the L-shaped scraper, the vertical rod and the second spring of the present invention.

[0028] In the figure: 1, base; 2, support plate; 3, roller; 4, liquid storage tank; 5, mounting rack; 6, controller; 7, water pump; 8, connecting rack; 9, vertical pipe; 10, square pipe; 11, placement box; 12, rail; 13, small storage battery; 14, bracket; 15, probe; 16, first spring; 17, protective cover; 18, locking mechanism; 181, fixing rack; 182, connecting shaft; 183, first gear; 184, arc-shaped toothed plate; 185, guide plate; 186, electromagnet; 187, magnet; 188, first pulley; 189, second gear; 1810, third gear; 1811, second pulley; 1812, first motor; 19, second motor; 20, cleaning brush; 21, L-shaped scraping plate; 22, vertical rod; 23, second spring. Detailed implementation manner

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1

[0031] Please refer to Figures 1-7, the present invention provides a technical solution: an on-line intelligent rail flaw detection device, including a base 1 and a rail 12. Traveling wheels are rotatably installed on both sides of the front and back of the base 1. A liquid storage tank 4 is fixedly connected to the base 1. An installation frame 5 is fixedly connected to the right side of the liquid storage tank 4. A controller 6 is fixedly connected to the installation frame 5. Grooves are provided on both sides of the base 1, and rollers 3 cooperating with the rail 12 are rotatably connected in the grooves. A support plate 2 is fixedly connected to the left side of the base 1. A locking mechanism 18 is provided on the support plate 2. The design of the locking mechanism 18 facilitates quickly adsorbing the electromagnet 186 on the rail 12, thereby quickly limiting the device, avoiding displacement of the device during fixed-point flaw detection, and improving the accuracy of flaw detection of the ultrasonic probe 15 on the rail 12. A bracket 14 is rotatably connected to the left side of the inner cavity of the base 1. A probe 15 capable of flaw detecting the rail 12 is rotatably connected to the bottom of the bracket 14. Two groups of first springs 16 are symmetrically arranged along the front and back directions on the left side of the bracket 14, and one end of the first spring 16 is fixedly connected to the base 1. By using the elastic rebound of the first spring 16, the probe 15 can always be in contact with the rail 12, improving the flaw detection accuracy. A water pump 7 is provided on the liquid storage tank 4. The liquid inlet end of the water pump 7 passes through the pipeline into the liquid storage tank 4. The liquid outlet end of the water pump 7 is communicated with a connecting frame 8. A square tube 10 is inserted into the left side of the top of the base 1. Three vertical tubes 9 are communicated along the front and back directions on the square tube 10, and the tops of the vertical tubes 9 are communicated with the connecting frame 8, facilitating spraying a coupling agent on the rail 12 and improving the flaw detection accuracy.

[0032] Embodiment 2

[0033] Please refer to Figures 1-7The present invention provides a technical solution: an online intelligent flaw detection device for rails, comprising a base 1 and a rail 12, both sides of the front and back of the base 1 are rotatably equipped with walking wheels, a liquid storage tank 4 is fixedly connected to the base 1, a mounting frame 5 is fixedly connected to the right side of the liquid storage tank 4, a controller 6 is fixedly connected to the mounting frame 5, a placement box 11 is fixedly connected to the right side of the top of the base 1, which is convenient for placing tools to avoid loss, a small battery 13 is arranged on the base 1 and the top of the small battery 13 is arranged on the right side of the bottom of the mounting frame 5, which is convenient for providing power to the electrical components in the device, grooves are opened on both sides of the base 1, and rollers 3 used in conjunction with the rail 12 are rotatably connected in the grooves, a support plate 2 is fixedly connected to the left side of the base 1, and a support plate 2 is fixedly connected to the left side of the base 1. An L-shaped scraper 21 is inserted on the right side of the top of the plate 2, and the bottom of the L-shaped scraper 21 is attached to the rail 12. Three groups of vertical rods 22 are fixedly connected in sequence along the front-to-back direction on the right side of the top of the support plate 2, and the top of the vertical rod 22 passes through the L-shaped scraper 21 and is fixedly connected to the limited block. A second spring 23 is wound around the vertical rod 22, one end of the second spring 23 is fixedly connected to the support plate 2, and the other end of the second spring 23 is fixedly connected to the L-shaped scraper 21. The elastic rebound of the second spring 23 can make the L-shaped scraper 21 always attached to the rail 12, so that when the device moves, the L-shaped scraper 21 can be pushed to move synchronously and the attachments on the rail 12 can be quickly removed to avoid affecting the accuracy of the probe 15 when detecting the flaws of the rail 12. The left side of the top of the shield 17 A second motor 19 is fixedly connected, and the output end of the second motor 19 passes through the support plate 2 and is fixedly connected to a cleaning brush 20 that can remove impurities on the rail 12. The cleaning brush 20 is located on the left side of the L-shaped scraper 21. The second motor 19 can be used to drive the cleaning brush 20 to rotate quickly, which is convenient for preliminary removal of impurities on the rail 12. A locking mechanism 18 is provided on the support plate 2. The locking mechanism 18 includes two sets of fixing frames 181. The sides of the two sets of fixing frames 181 that are close to each other are fixedly connected to the front and back sides of the support plate 2. A connecting shaft 182 is connected to the fixing frame 181 for transverse rotation. A first gear 183 is fixedly connected to the connecting shaft 182 and the first gear 183 is located in the fixing frame 181. The bottom of the support plate 2 rotates symmetrically along the front and back directions. A guide plate 185 is connected, and an end of the guide plate 185 away from the support plate 2 is rotatably connected to an electromagnet 186. Both sides of the electromagnet 186 are fixedly connected to magnets 187 through connecting plates. The sides of the electromagnet 186 and the magnet 187 close to the rail 12 are adsorbed on the rail 12. The side of the guide plate 185 away from each other is fixedly connected to an arc-shaped toothed plate 184 that can mesh with the first gear 183. An arc-shaped groove used in conjunction with the arc-shaped toothed plate 184 is provided in the fixing frame 181, which can limit the arc-shaped toothed plate 184 to prevent the arc-shaped toothed plate 184 from being separated from the first gear 183. One end of the two sets of connecting shafts 182 is fixedly connected to the first pulley 188 and the second gear 189 in the front-rear direction respectively. A shield 17 is fixedly connected to the support plate 2.On the back of the left side of the shield 17, a fixed shaft is rotatably connected. Along the left - right direction on the fixed shaft, a third gear 1810 and a second pulley 1811 are fixedly connected in sequence. The surfaces of the first pulley 188 and the second pulley 1811 are connected by belt drive. The second gear 189 and the third gear 1810 are meshed on the side close to each other. One side of the shield 17 is fixedly connected with a first motor 1812 through a mounting frame, and the output end of the first motor 1812 is fixedly connected to the fixed shaft. The design of the locking mechanism 18 facilitates quickly adsorbing the electromagnet 186 on the rail 12, thereby quickly limiting the position of the device, avoiding displacement during fixed - point flaw detection of the rail, and improving the accuracy of flaw detection of the ultrasonic probe 15 on the rail 12. Vertical grooves for cooperating with the arc - shaped tooth plate 184 are provided on both the front and back of the shield 17. Limiting grooves for cooperating with the arc - shaped tooth plate 184 are symmetrically provided on the support plate 2 along the front - back direction. The design of the vertical grooves and the limiting grooves facilitates the unobstructed swinging of the arc - shaped tooth plate 184. On the top of the right side of the shield 17, two groups of pull rods are symmetrically arranged along the front - back direction, and one end of the pull rod is fixedly connected to the base 1. The design of the pull rod improves the overall strength of the shield 17, thereby improving the stability of the support plate 2 and avoiding breakage easily due to excessive components loaded on the support plate 2. On the left side of the inner cavity of the base 1, a bracket 14 is rotatably connected. The bottom of the bracket 14 is rotatably connected with a probe 15 for flaw detection of the rail 12. On the left side of the bracket 14, two groups of first springs 16 are symmetrically arranged along the front - back direction, and one end of the first spring 16 is fixedly connected to the base 1. Utilizing the elastic rebound of the first spring 16, the probe 15 can always be in contact with the rail 12, improving the flaw detection accuracy. A water pump 7 is provided on the liquid storage tank 4. The liquid inlet end of the water pump 7 penetrates through the pipeline into the liquid storage tank 4. The liquid outlet end of the water pump 7 is communicated with a connecting frame 8. A square pipe 10 is inserted into the left side of the top of the base 1. Three vertical pipes 9 are communicated with the square pipe 10 along the front - back direction, and the tops of the vertical pipes 9 are communicated with the connecting frame 8, facilitating spraying the coupling agent on the rail 12 and improving the flaw detection accuracy.

[0034] A method for using an on - line intelligent rail flaw detection device includes the following steps:

[0035] S1. The user places the device on the rail 12. At this time, the L - shaped scraper 21 will come into contact with the rail 12 in advance. As the device continues to move downwards, the L - shaped scraper 21 will be continuously squeezed, and the second spring 23 will be stretched until the roller 3 is clamped on the rail 12. Subsequently, the user turns on the second motor 19 and the water pump 7 through the controller 6. The second motor 19 can drive the cleaning brush 20 to rotate quickly to preliminarily remove impurities on the rail 12. At this time, the water pump 7 transports the coupling agent in the liquid storage tank 4 to the square pipe 10 via the connecting frame 8 and the vertical pipes 9. Subsequently, the coupling agent can be quickly coated on the rail 12 via the square pipe 10;

[0036] S2. Subsequently, the user pushes the device, which can drive the probe 15 and the L-shaped scraper 21 to move synchronously. The ultrasonic probe 15 is used to quickly detect the flaw of the rail 12. At the same time, by the elastic rebound of the second spring 23, the L-shaped scraper 21 can always fit on the rail 12 and quickly remove the attachments on the rail 12, avoiding affecting the accuracy of the flaw detection of the rail 12 by the probe 15.

[0037] S3. When fixed-point flaw detection is required, the user turns on the first motor 1812. The first motor 1812 can drive the third gear 1810 and the second pulley 1811 to rotate synchronously. Thus, with the assistance of the second gear 189 and the first pulley 188, the two connecting shafts 182 and the first gear 183 can be driven to rotate synchronously in the opposite direction, and then the two arc-shaped tooth plates 184 can be driven to rotate synchronously in the opposite direction. Since both ends of the guide plate 185 can rotate, the arc-shaped tooth plate 184 can drive the guide plate 185 to swing until the electromagnet 186 and the magnet 187 are in contact with the rail 12. At this time, the magnet 187 can quickly adsorb on the rail 12 to position the electromagnet 186. Then the user energizes the electromagnet 186 through the controller 6 to quickly adsorb the electromagnet 186 on the rail 12, so as to quickly limit the position of the device, avoid the displacement of the device during fixed-point flaw detection, improve the accuracy of the flaw detection of the rail 12 by the ultrasonic probe 15, and at the same time, the user can use the ultrasonic probe 15 to perform fixed-point flaw detection on the rail 12.

[0038] However, as is well known to those skilled in the art, the working principles and wiring methods of the first motor 1812, the second motor 19, the electromagnet 186, the controller 6, the small storage battery 13 and the probe 15 are common knowledge. They all belong to conventional means or well-known common sense, so they will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An online intelligent rail flaw detection device, comprising a base (1) and a rail (12), Characterized in that: Walking wheels are rotatably installed on both sides of the front and back of the base (1). A liquid storage tank (4) is fixedly connected to the base (1). An installation frame (5) is fixedly connected to the right side of the liquid storage tank (4). A controller (6) is fixedly connected to the installation frame (5). Grooves are formed on both sides of the base (1), and rollers (3) cooperating with the rail (12) are rotatably connected in the grooves. A support plate (2) is fixedly connected to the left side of the base (1), and a locking mechanism (18) is arranged on the support plate (2); A bracket (14) is rotatably connected to the left side of the inner cavity of the base (1). A probe (15) capable of detecting flaws in the rail (12) is rotatably connected to the bottom of the bracket (14). Two groups of first springs (16) are symmetrically arranged on the left side of the bracket (14) in the front-rear direction, and one end of each first spring (16) is fixedly connected to the base (1); A water pump (7) is arranged on the liquid storage tank (4). The liquid inlet end of the water pump (7) penetrates into the liquid storage tank (4) through a pipeline. The liquid outlet end of the water pump (7) is communicated with a connecting frame (8). A square pipe (10) is inserted into the left side of the top of the base (1). Three vertical pipes (9) are communicated with the square pipe (10) in the front-rear direction, and the tops of the vertical pipes (9) are communicated with the connecting frame (8); The locking mechanism (18) includes two groups of fixing frames (181). One side of the two groups of fixing frames (181) close to each other is fixedly connected to the front and back of the support plate (2). A connecting shaft (182) is rotatably connected horizontally in the fixing frame (181). A first gear (183) is fixedly connected to the connecting shaft (182) and the first gear (183) is located inside the fixing frame (181). Guide plates (185) are rotatably connected symmetrically along the front-back direction at the bottom of the support plate (2). An electromagnet (186) is rotatably connected to one end of the guide plate (185) away from the support plate (2). Magnets (187) are fixedly connected to both sides of the electromagnet (186) through connecting plates. One side of the electromagnet (186) and the magnets (187) close to the rail (12) are adsorbed on the rail (12). Arc-shaped toothed plates (184) that can mesh with the first gear (183) are fixedly connected to the sides of the guide plates (185) away from each other. One end of the two groups of connecting shafts (182) is fixedly connected with a first pulley (188) and a second gear (189) respectively along the front-back direction. A protective cover (17) is fixedly connected to the support plate (2). A fixed shaft is rotatably connected to the back of the left side of the protective cover (17). A third gear (1810) and a second pulley (1811) are fixedly connected to the fixed shaft in sequence along the left-right direction. The surfaces of the first pulley (188) and the second pulley (1811) are connected by belt drive. The sides of the second gear (189) and the third gear (1810) close to each other are meshed. A first motor (1812) is fixedly connected to one side of the protective cover (17) through a mounting frame and the output end of the first motor (1812) is fixedly connected to the fixed shaft; A second motor (19) is fixedly connected to the left side of the top of the protective cover (17). The output end of the second motor (19) penetrates through the support plate (2) and is fixedly connected with a cleaning brush (20) that can remove impurities on the rail (12). The cleaning brush (20) is located on the left side of the L-shaped scraping plate (21); Vertical grooves for cooperating with the arc-shaped toothed plates (184) are formed in the front and back of the protective cover (17). Limit grooves for cooperating with the arc-shaped toothed plates (184) are symmetrically formed in the support plate (2) along the front-back direction. Two groups of pull rods are symmetrically arranged along the front-back direction at the top of the right side of the protective cover (17), and one end of each pull rod is fixedly connected to the base (1); An arc-shaped groove for cooperating with the arc-shaped toothed plate (184) is formed in the fixing frame (181).

2. An on-line intelligent rail flaw detection device according to claim 1, characterized in that: On the right side of the top of the support plate (2), an L-shaped scraper (21) is inserted, and the bottom of the L-shaped scraper (21) is attached to the rail (12). On the right side of the top of the support plate (2), three vertical rods (22) are fixedly connected in sequence along the front-rear direction. The top ends of the vertical rods (22) penetrate through the L-shaped scraper (21) and are fixedly connected with limit blocks. A second spring (23) is wound around the vertical rod (22). One end of the second spring (23) is fixedly connected to the support plate (2), and the other end of the second spring (23) is fixedly connected to the L-shaped scraper (21).

3. An on-line intelligent rail flaw detection device according to claim 1, characterized in that: On the right side of the top of the base (1), a placement box (11) is fixedly connected. A small storage battery (13) is arranged on the base (1), and the top of the small storage battery (13) is arranged on the right side of the bottom of the mounting frame (5).

4. A method for using an on-line intelligent rail flaw detection device according to any one of claims 1-3, characterized in that: comprises the following steps: S1. The user places the device on the rail (12). At this time, the L-shaped scraper (21) will come into contact with the rail (12) in advance. As the device continues to move downward, the L-shaped scraper (21) will be continuously squeezed, and the second spring (23) will be stretched until the roller (3) is clamped on the rail (12). Subsequently, the user turns on the second motor (19) and the water pump (7) through the controller (6). The second motor (19) can drive the cleaning brush (20) to rotate rapidly to initially remove impurities on the rail (12). At this time, the water pump (7) transfers the coupling agent in the liquid storage tank (4) to the square pipe (10) through the connecting frame (8) and the vertical pipe (9). Subsequently, the coupling agent can be quickly coated on the rail (12) through the square pipe (10); S2. Subsequently, the user pushes the device, which can drive the probe (15) and the L-shaped scraper (21) to move synchronously. The ultrasonic probe (15) is used to quickly detect the rail (12). At the same time, by using the elastic rebound of the second spring (23), the L-shaped scraper (21) can always be attached to the rail (12), and the attachments on the rail (12) can be quickly removed; S3. When fixed-point flaw detection is required, the user turns on the first motor (1812). The first motor (1812) can drive the third gear (1810) and the second pulley (1811) to rotate synchronously. Thus, with the assistance of the second gear (189) and the first pulley (188), it can drive the two connecting shafts (182) and the first gear (183) to rotate synchronously in opposite directions, and then drive the two arc-shaped tooth plates (184) to rotate synchronously in opposite directions. Since both ends of the guide plate (185) can rotate, the arc-shaped tooth plate (184) can drive the guide plate (185) to swing until the electromagnet (186) and the magnet (187) are in contact with the rail (12). At this time, the magnet (187) can quickly adsorb on the rail (12) to position the electromagnet (186). Then the user energizes the electromagnet (186) through the controller (6) to quickly adsorb the electromagnet (186) on the rail (12), thereby quickly limiting the position of the device, preventing the device from displacing during fixed-point flaw detection, improving the accuracy of the ultrasonic probe (15) when detecting flaws in the rail (12), and at the same time, the user can use the ultrasonic probe (15) to perform fixed-point flaw detection on the rail (12).

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