Steel rail surface detection device

Abstract

The utility model discloses a steel rail surface detection device which comprises a supporting body, a surface detection assembly and at least one speed detection assembly, the supporting body is provided with a detection channel allowing a steel rail to pass through, the surface detection assembly comprises a plurality of image acquisition pieces, and the image acquisition pieces are arranged relative to the steel rail. The image acquisition pieces are arranged at intervals in the circumferential direction of the detection channel and are connected to the supporting body, and the speed detection assembly is connected to the supporting body and used for detecting the moving speed of the steel rail relative to the supporting body. According to the utility model, the problem that the detection precision and efficiency are not qualified easily due to the fact that the surface image of the steel rail cannot be accurately obtained when the steel rail passes through the roller line according to the required speed because the 3D cameras are only arranged on the periphery of the steel rail can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail detection technical field, concretely relates to a rail surface detection device. BACKGROUND

[0002] In order to solve the problem of uncertainty and contingency caused by manual identification of rail pre-welding surface quality detection, relevant automatic detection device emerges as the times require.

[0003] For example, the Chinese utility model patent with publication number CN218121787U, named as a device for rail surface quality detection, includes mounting bracket, camera and position adjusting mechanism, wherein the middle part of mounting bracket has a hole for rail to pass through, at least four cameras are dispersedly arranged around mounting bracket, and the shooting direction of camera is aligned with hole, one position adjusting mechanism is arranged corresponding to each camera, and camera is connected with mounting bracket through position adjusting mechanism, the device adjusts the position and angle of camera through position adjusting mechanism, so that the surface of rail can be more comprehensively shot by camera, and then the full profile detection of rail pre-welding surface quality is ensured, and the efficiency and accuracy of rail surface quality detection are improved.

[0004] But the prior art only sets up 3D camera around rail and uses camera to acquire the surface image of rail, so that the surface image of rail cannot be accurately acquired when rail passes through roller line at required speed, thereby easily leading to unqualified detection precision and efficiency. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the above technical deficiencies, and provides a rail surface detection device to solve the technical problem that the surface image of rail cannot be accurately acquired when rail passes through roller line at required speed in the prior art, thereby easily leading to unqualified detection precision and efficiency.

[0006] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a rail surface detection device, which comprises:

[0008] A support body is provided with a detection channel allowing the rail to pass through;

[0009] A surface detection assembly comprises a plurality of image acquisition units, each of which is arranged relative to the rail and is spaced apart along the circumferential direction of the detection channel and connected to the support body; and

[0010] At least one speed detection assembly is connected to the support body and used for detecting the speed of the rail moving relative to the support body.

[0011] In some embodiments, the speed detecting assembly comprises an abutting member and a detecting member, the abutting member movably abuts against the rail and is rotatable relative to the support body, the detecting member has a fixed end and a detecting end, the fixed end of the detecting member is connected to the support body, and the detecting end is connected to the abutting member, for detecting the speed of the abutting member rotating relative to the support body.

[0012] In some embodiments, the speed detecting assembly further comprises a connecting member and an elastic part, one end of the connecting member is rotatably connected to the support body, the fixed end of the detecting member is connected to the other end of the connecting member, the detecting end is coaxially arranged with the rotation axis of the abutting member and is connected to the abutting member, and one end of the elastic part is hingedly connected to the middle part of the connecting member, and the other end is connected to the support body, for generating an elastic force to push the abutting member to always movably abut against the rail.

[0013] In some embodiments, the speed detecting assembly further comprises a mounting plate, the mounting plate is arranged above the rail and is connected to one side of the support body, one end of the connecting member is rotatably connected to the mounting plate, and the other end of the elastic part is arranged in a spaced manner with one end of the connecting member and is movably connected to the mounting plate.

[0014] In some embodiments, the speed detecting assembly further comprises a sliding member, the sliding member is movably connected to the mounting plate and is hingedly connected to the other end of the elastic part, for driving the elastic part, the connecting member and the abutting member to slide close to or away from the rail.

[0015] In some embodiments, the speed detecting assembly further comprises a fixing seat and an adjusting member, the fixing seat is fixedly connected to the mounting plate, the sliding member is arranged in a spaced manner with the fixing seat and is movably connected to the mounting plate, the adjusting member has a fixed end and a movable end, the fixed end of the adjusting member is connected to the fixing seat, and the movable end is connected to the sliding member, for driving the sliding member to slide relative to the mounting plate.

[0016] In some embodiments, the fixing seat is provided with a threaded hole, the adjusting member comprises a connecting plate and a bolt, the connecting plate is connected to the sliding member, the threaded section of the bolt is threadedly connected to the fixing seat and is rotatably connected to the connecting plate, and rotation of the bolt around its axis can drive the sliding member to slide relative to the mounting plate.

[0017] In some embodiments, the number of the speed detecting assemblies is two, the two mounting plates are respectively connected to the two sides of the support body, and the two abutting members are arranged in a spaced manner along the guide of the detecting channel and movably abut against the rail respectively.

[0018] In some embodiments, the support body is hollow, and the detection channel is formed in the middle of the support body.

[0019] In some embodiments, the number of the image acquisition units in the surface detection assembly is six, two of which are arranged opposite to the rail and connected to two opposite side walls of the detection channel respectively, and the other four of which are arranged in pairs, two pairs of the image acquisition units are arranged opposite to the rail and connected to the other two opposite side walls of the detection channel respectively.

[0020] Compared with the prior art, the steel rail surface detection device has the following beneficial effects: the support body is provided with a detection channel for allowing the rail to pass through, a plurality of image acquisition units are arranged opposite to the rail and spaced apart along the circumferential direction of the detection channel for collecting the image of the rail surface, and at least one speed detection assembly is connected to the support body for detecting the speed of the rail moving relative to the support body. Compared with the prior art, the plurality of image acquisition units are spaced apart along the circumferential direction of the detection channel to collect the image information around the rail when the rail moves relative to the support body, and the speed detection assembly can collect the speed of the rail moving relative to the support body, thereby avoiding the single collection of the image of the rail surface in the prior art, increasing the corresponding parameters during data processing by detecting the speed of the rail relative to the camera, improving the detection accuracy, and solving the technical problem that the surface image of the rail cannot be accurately obtained when the rail passes through the roller line at the required speed in the prior art, thereby easily leading to unqualified detection precision and efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a three-dimensional view of a steel rail surface detection device connected with a steel rail according to an embodiment of the present application;

[0022] Figure 2 is a structural schematic view of a steel rail surface detection device connected with a steel rail according to an embodiment of the present application;

[0023] Figure 3 is a structural schematic view of a steel rail surface detection device connected with a steel rail according to an embodiment of the present application;

[0024] Figure 4 is a three-dimensional view of a speed detection assembly according to an embodiment of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS:

[0026] Supporting body 100; surface detection assembly 200; image acquisition piece 210; speed detection assembly 300; abutting piece 310; abutting wheel 311; connecting shaft 312; detection piece 320; connecting piece 330; rotating seat 331; rotating rod 332; elastic part 340; mounting plate 350; sliding piece 360; sliding block 361; fixing seat 370; adjusting piece 380; connecting plate 381; bolt 382; steel rail 400. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0028] In order to solve the technical problem that the surface image of the steel rail cannot be accurately obtained when the steel rail passes through the roller line at the required speed, thereby easily leading to unqualified detection accuracy and efficiency, the utility model provides a steel rail surface detection device, which can realize the interval arrangement of multiple image acquisition pieces 210 along the circumferential direction of the detection channel, can collect the image information around the steel rail 400 when the steel rail 400 moves relative to the supporting body 100, and can collect the speed of the steel rail 400 moving relative to the supporting body 100 through at least one speed detection assembly 300, thereby avoiding the single collection of the surface image of the steel rail 400 in the prior art, and being capable of increasing the corresponding parameters during data processing by detecting the speed of the steel rail 400 relative to the camera, thereby improving the detection accuracy.

[0029] Please refer to Figure 1 , Figures 1 to 3 It is the structural schematic view of the steel rail surface detection device in an embodiment of the utility model, which comprises a supporting body 100, a surface detection assembly 200 and at least one speed detection assembly 300. The supporting body 100 is provided with a detection channel allowing the steel rail 400 to pass through. The surface detection assembly 200 comprises multiple image acquisition pieces 210, which are all arranged relative to the steel rail 400 and are all connected to the supporting body 100 and are arranged at intervals along the circumferential direction of the detection channel. The speed detection assembly 300 is connected to the supporting body 100 and is used for detecting the speed of the steel rail 400 moving relative to the supporting body 100.

[0030] Further, since the steel rail passes through different roller lines, the relative speed of the steel rail when passing through the 3D camera is inconsistent due to the different roller line speeds of different welding rail bases. Usually, the speed of the steel rail when passing through the roller line is 0.4 m / s, but if only the 3D camera is arranged to detect the pre-welding surface quality of the steel rail 400, the speed of the steel rail relative to the 3D camera cannot be accurately obtained, which easily leads to low detection accuracy.

[0031] In the device, the support body 100 is provided with a detection channel for allowing the steel rail 400 to pass through, a plurality of image acquisition units 210 are arranged relative to the steel rail 400 and are arranged at intervals along the circumferential direction of the detection channel for acquiring the surface image of the steel rail 400, and at least one speed detection assembly 300 is connected to the support body 100 for detecting the speed of the steel rail 400 moving relative to the support body 100.

[0032] In the embodiment, the plurality of image acquisition units 210 are arranged at intervals along the circumferential direction of the detection channel, so that the image information around the steel rail 400 moving relative to the support body 100 can be acquired, and the speed of the steel rail 400 moving relative to the support body 100 can be acquired through the at least one speed detection assembly 300, thereby avoiding the prior art of acquiring the surface image of the steel rail 400 through a single 3D camera distributed around the steel rail 400, increasing the corresponding parameters during data processing, improving the detection accuracy, and solving the technical problem of low detection precision of the surface quality detection of the steel rail 400 before welding in the prior art.

[0033] In addition, in some embodiments, the surface detection assembly 200 should also include a surface detection unit 320, which can obtain the position data and light intensity data of the full cross section of the steel rail 400 according to the image or video information acquired by the image acquisition unit 210. The surface detection unit 320 is a conventional arrangement known to those skilled in the art, and will not be described in detail here.

[0034] Further, in the device, the speed detection assembly 300 measures the passing speed of the steel rail 400, and the image acquisition unit 210 can detect the surface quality of the steel rail 400. After the user obtains the passing speed of the steel rail 400 and the surface quality information of the steel rail 400, the quality problem point can be judged through the light intensity diagram, and the result can be judged through the position and size checking, so as to finally obtain the surface quality detection result, which is beneficial to improve the accuracy of the surface quality detection of the steel rail 400 before welding.

[0035] In addition, in some embodiments, the device also includes an electrical control assembly and a roller line for driving the steel rail 400 to move relative to the support body 100, the electrical control assembly being used to control the operation or stop of the roller line, and the speed detection assembly 300 and the surface detection member 320 are electrically connected with the electrical control assembly and the roller line. The electrical control assembly is connected with the speed detection assembly 300 to feed back the measured speed to the surface detection assembly 200, and the electrical control assembly is connected with the surface detection assembly 200 to control the surface detection assembly 200 to start or end detection. The electrical control assembly and the roller line belong to the conventional settings known to those skilled in the art, which are used to realize the automation and intelligentization of detection, and will not be described in detail here.

[0036] In this embodiment, as shown in Figures 1 to 3 , the support body 100 is hollow, and a detection passage is formed in the middle thereof.

[0037] The support body 100 is formed by welding a plurality of steel materials arranged in a longitudinal and transverse interlaced manner to form a hollow steel frame structure, and a detection passage allowing the steel rail 400 to pass through is formed in the middle thereof. The hollow steel frame structure can reduce the self-weight and manufacturing cost of the surface detection device, and is convenient for construction and installation.

[0038] In this embodiment, as shown in Figures 1 to 3 , the number of image acquisition members 210 in the surface detection assembly 200 is six, two of which are arranged relative to the steel rail 400 and are connected to the two opposite side walls of the detection passage, respectively, and the other four image acquisition members 210 are arranged in pairs, two pairs of image acquisition members 210 are arranged relative to the steel rail 400 and are connected to the other two opposite side walls of the detection passage, respectively.

[0039] Two image acquisition members 210 are arranged above and below the steel rail 400, respectively, and four image acquisition members 210 are arranged in two groups, respectively, two groups of image acquisition members 210 are arranged on the left and right sides of the steel rail 400, respectively, and the two image acquisition members 210 on the left or right side of the steel rail 400 are arranged at intervals, and are arranged inclined relative to the support body 100, respectively, so that the image acquisition members 210 can face the steel rail 400 and surround the full section of the steel rail 400, for improving the accuracy of image detection.

[0040] The image acquisition member 210 is a 2D line scanning camera or a 3D camera commonly seen in the market and easy to purchase. The 2D line scanning camera or 3D camera belongs to the conventional settings known to those skilled in the art, which will not be described in detail here.

[0041] In this embodiment, as shown in Figure 1 , Figure 4As shown, the speed detection assembly 300 comprises an abutting member 310 and a detection member 320, a connecting member 330 and an elastic part 340, a mounting plate 350, a sliding member 360, a fixing seat 370 and an adjusting member 380.

[0042] The abutting member 310 movably abuts against the rail 400 and can rotate relative to the support body 100, the detection member 320 has a fixed end and a detection end, the fixed end of the detection member 320 is connected to the support body 100, and the detection end is connected to the abutting member 310, for detecting the speed of the abutting member 310 rotating relative to the support body 100.

[0043] The abutting member 310 abuts against the rail 400, and when the rail 400 moves relative to the support body 100, the abutting member 310 can be driven to rotate relative to the support body 100, and the detection end of the detection member 320 detects the speed of the abutting member 310 rotating relative to the support body 100 to convert into the moving speed of the rail 400 relative to the support body 100.

[0044] Further, the abutting member 310 comprises an abutting wheel 311 and a connecting shaft 312, the connecting shaft 312 is rotatably connected to the support body 100, and the abutting wheel 311 is fixedly sleeved on the connecting shaft 312 and abuts against the rail 400, and the detection member 320 is a common and easily purchased encoder in the market, the encoder is connected to the support body 100, and the detection end of the encoder is connected to the connecting shaft 312, for recording and feeding back the rotating speed of the abutting wheel 311, and the encoder can also be replaced by a sensor, which is a common setting known to those skilled in the art and will not be described in detail.

[0045] In one embodiment, referring to Figure 4 The mounting plate 350 is arranged above the rail 400 and connected to one side of the support body 100, one end of the connecting member 330 is rotatably connected to the mounting plate 350, and the other end of the elastic part 340 is arranged in a spaced manner with the one end of the connecting member 330 and movably connected to the mounting plate 350.

[0046] The mounting plate 350 is connected to the support body 100, for mounting the abutting member 310, the detection member 320, the connecting member 330, the elastic part 340, the sliding member 360, the fixing seat 370 and the adjusting member 380.

[0047] In one embodiment, referring to Figure 4 One end of the connecting member 330 is rotatably connected to the support body 100, the fixed end of the detection member 320 is connected to the other end of the connecting member 330, the detection end is coaxially arranged with the rotating axis of the abutting member 310 and connected to the abutting member 310, one end of the elastic part 340 is hingedly connected to the middle part of the connecting member 330, and the other end is connected to the support body 100, for generating an elastic force to push the abutting member 310 to always movably abut against the rail 400.

[0048] The abutting member 310 and the detecting member 320 are rotationally connected to the support body 100 via the connecting member 330, and one end of the elastic part 340 is hingedly connected to the middle of the connecting member 330 and the other end is connected to the support body 100. The elastic force generated by the elastic part 340 can push the connecting member 330 to rotate relative to the support body 100, and enable the abutting member 310 to always abut against the steel rail 400, effectively improving the accuracy of detection.

[0049] Further, the elastic part 340 is a nitrogen spring commonly available on the market and easy to purchase. The nitrogen spring can generate an elastic force, which is a conventional arrangement known to those skilled in the art and will not be described in more detail.

[0050] In one embodiment, referring to Figure 4 The connecting member 330 includes a rotating seat 331 and a rotating rod 332. The rotating seat 331 is fixedly connected to the mounting plate 350. One end of the rotating rod 332 is provided with the abutting member 310 and the detecting member 320, and the other end is rotationally connected to the rotating seat 331.

[0051] In addition, the elastic part 340 can also be a sliding rod with telescopic function and a spring. The spring is sleeved on the sliding rod and connected to the rotating rod 332 and the mounting plate 350, and is used to generate an elastic force to push the abutting member 310 to always abut against the steel rail 400. Details are not described herein.

[0052] In one embodiment, referring to Figure 4 The sliding member 360 is slidingly connected to the mounting plate 350 and hingedly connected to the other end of the elastic part 340, and is used to drive the elastic part 340, the connecting member 330 and the abutting member 310 to slide towards or away from the steel rail 400.

[0053] The sliding member 360 is used to achieve the sliding connection between the other end of the elastic part 340 and the mounting plate 350.

[0054] Further, the mounting plate 350 is provided with a threaded mounting hole. The sliding member 360 includes a sliding block 361 and a plurality of fastening bolts 382. The sliding block 361 is provided with a waist hole relative to the threaded mounting hole. The threaded section of the fastening bolt 382 passes through the waist hole and is threadedly connected to the threaded mounting hole, so that the sliding block 361 can slide relative to the mounting plate 350. Details are not described herein.

[0055] In one embodiment, referring to Figure 4The fixed seat 370 is fixedly connected to the mounting plate 350, the sliding piece 360 is arranged at intervals with the fixed seat 370 and is slidably connected to the mounting plate 350, the adjusting piece 380 has a fixed end and a movable end, the fixed end of the adjusting piece 380 is connected to the fixed seat 370, and the movable end is connected to the sliding piece 360, so as to drive the sliding piece 360 to slide relative to the mounting plate 350.

[0056] The fixed seat 370 and the adjusting piece 380 are arranged, so that the sliding piece 360 can slide relative to the fixed seat 370 under the driving of the adjusting piece 380.

[0057] In one of the embodiments, referring to Figure 4 The fixed seat 370 is provided with a threaded hole, the adjusting piece 380 comprises a connecting plate 381 and a bolt 382, the connecting plate 381 is connected to the sliding piece 360, the threaded section of the bolt 382 is threadedly connected to the fixed seat 370 and is rotationally connected with the connecting plate 381, and rotation of the bolt 382 around the axis thereof can drive the sliding piece 360 to slide relative to the mounting plate 350.

[0058] The connecting plate 381, the bolt 382 and the threaded hole arranged on the fixed seat 370 form a linear driving structure similar to a ball screw nut pair, so that rotation of the bolt 382 around the axis thereof can drive the connecting plate 381 and the sliding piece 360 to move linearly relative to the fixed seat 370.

[0059] Further, the adjusting piece 380 can also be a linear driving piece, such as a pneumatic cylinder, a hydraulic cylinder and a push rod motor, which is a conventional arrangement known to those skilled in the art and will not be described in detail.

[0060] In one of the embodiments, referring to Figures 1 to 3 The number of the speed detection assemblies 300 is two, the two mounting plates 350 are respectively connected to the two sides of the support body 100, and the two abutting pieces 310 are arranged at intervals along the guide of the detection channel and are respectively in movable abutment with the steel rail 400.

[0061] The detection structure is arranged on the two sides of the support body 100, so that when the head and the tail of the steel rail 400 are measured, the speed of the steel rail 400 can be recorded by the electrical control assembly, and the accuracy of detection is improved.

[0062] In order to better understand the present application, the technical scheme of the present application will be described in detail below: Figures 1 to 4

[0063] ​The support body 100 is provided with a detection channel for allowing the steel rail 400 to pass through, a plurality of image acquisition assemblies 210 are arranged relative to the steel rail 400 and are arranged at intervals along the circumferential direction of the detection channel, and are used for acquiring the surface image of the steel rail 400; and at least one speed detection assembly 300 is connected to the support body 100 and is used for detecting the speed of the steel rail 400 moving relative to the support body 100. Compared with the prior art, by arranging a plurality of image acquisition assemblies 210 at intervals along the circumferential direction of the detection channel, the image information around the steel rail 400 when moving relative to the support body 100 can be acquired, and at the same time, by using the at least one speed detection assembly 300, the speed of the steel rail 400 moving relative to the support body 100 can be acquired, thereby avoiding the prior art of acquiring only the surface image of the steel rail 400, so that the image information around the steel rail 400 when moving relative to the support body 100 and the speed information can be acquired at the same time, and by detecting the speed of the steel rail 400 relative to the camera, corresponding parameters are added during data processing, and the detection accuracy is improved.

[0064] The specific working process of the utility model, in use, the steel rail 400 is driven by the roller line to enter the detection channel along the length direction, the abutting member 310 is driven by the adjusting member 380, the sliding member 360, the elastic part 340 and the connecting member 330 and can always abut on the surface of the steel rail 400, along with the steel rail 400 constantly moving relative to the support body 100, the speed detection assembly 300 measures the passing speed of the steel rail 400, and the image acquisition assembly 210 can detect the surface quality of the steel rail 400, after the user acquires the passing speed of the steel rail 400 and the surface quality information of the steel rail 400, the quality problem point can be judged by the light intensity diagram, and the result is judged by the position size checking, and finally the surface quality detection result is obtained

[0065] The device can solve the technical problem of low detection precision of the pre-welding surface quality detection of the steel rail 400 in the prior art because the surface image of the steel rail cannot be accurately acquired when the steel rail passes through the roller line at the required speed.

[0066] The specific implementation mode of the utility model described above does not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A rail surface inspection apparatus, characterised in that, The application relates to a rail surface inspection device. The device comprises a support body, a surface inspection assembly and at least one speed detection assembly. The surface inspection assembly comprises a plurality of image acquisition units, each of which is arranged opposite to the rail and is spaced apart along the circumferential direction of the detection channel and is connected to the support body. The speed detection assembly is connected to the support body and is used for detecting the speed of the rail relative to the support body. The speed detection assembly comprises an abutting member and a detection member.

2. The rail surface inspection apparatus of claim 1, wherein The abutting member is movably abutted to the rail and can rotate relative to the support body.

3. The rail surface inspection apparatus of claim 2, wherein The detection member has a fixed end and a detection end.

4. The rail surface inspection apparatus of claim 3, wherein The fixed end of the detection member is connected to the support body, and the detection end is connected to the abutting member.

5. The rail surface inspection apparatus of claim 4, wherein, The speed detection assembly further comprises a connecting member and an elastic part.

6. The rail surface inspection apparatus of claim 5, wherein, One end of the connecting member is rotatably connected to the support body.

7. The rail surface inspection apparatus of claim 6, wherein The fixed end of the detection member is connected to the other end of the connecting member.

8. The rail surface inspection apparatus of claim 4, wherein The detection end is coaxially arranged with the rotation axis of the abutting member and is connected to the abutting member.

9. The rail surface inspection apparatus of claim 1, wherein One end of the elastic part is hingedly connected to the connecting member, and the other end is connected to the support body. The elastic part is used for generating an elastic force to push the abutting member to abut to the rail. The speed detection assembly further comprises a mounting plate. The mounting plate is arranged above the rail and is connected to one side of the support body. One end of the connecting member is rotatably connected to the mounting plate. The other end of the elastic part is spaced apart from one end of the connecting member and is movably connected to the mounting plate. The speed detection assembly further comprises a sliding member. The sliding member is slidably connected to the mounting plate and is hingedly connected to the other end of the elastic part. The sliding member is used for driving the elastic part, the connecting member and the abutting member to slide close to or away from the rail. The speed detection assembly further comprises a fixing seat and an adjusting member. The fixing seat is fixedly connected to the mounting plate. The sliding member is spaced apart from the fixing seat and is slidably connected to the mounting plate. The adjusting member has a fixed end and a movable end. The fixed end of the adjusting member is connected to the fixing seat, and the movable end is connected to the sliding member. The adjusting member is used for driving the sliding member to slide relative to the mounting plate. The fixing seat is provided with a threaded hole. The adjusting member comprises a connecting plate and a bolt. The threaded section of the bolt is threadedly connected to the fixing seat and is rotatably connected to the connecting plate. The bolt can drive the sliding member to slide relative to the mounting plate by rotating around the axis. The number of the speed detection assemblies is two. Two mounting plates are connected to two sides of the support body. Two abutting members are spaced apart along the guide of the detection channel and are movably abutted to the rail. The support body is hollow, and the detection channel is formed in the middle of the support body.

10. The rail surface inspection apparatus of claim 1, wherein, The number of the image collecting units in the surface detecting assembly is six, two of which are arranged opposite to the steel rail and connected to the opposite two side walls of the detecting channel respectively, and the other four of which are arranged opposite to the steel rail and connected to the other opposite two side walls of the detecting channel respectively.

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