Steel rail weld joint scanning device

Abstract

The utility model relates to the technical field of track detection, and particularly discloses a steel rail weld joint scanning device, which comprises a frame and an ultrasonic probe, the frame is provided with a clamping and fixing part fixed with a track, and the frame is internally provided with a second moving mechanism for realizing the movement of the ultrasonic probe along the length direction of the track. A first moving mechanism for realizing the movement of the second moving mechanism along the width direction of the track is arranged in the frame; according to the steel rail welding seam joint scanning device, the ultrasonic probe can circuitously move along the S shape for flaw detection, all-directional flaw detection on a rail welding seam area is realized, the accuracy of a flaw detection result is effectively guaranteed, and meanwhile, defects on the inner side and the outer side of a welding seam rail head can be detected by utilizing rail jaw reflection waves through ultrasonic flaw detection after eccentricity.

Description

Technical Field

[0001] The utility model relates to the technical field of track detection, and specifically discloses a scanning device for a rail weld joint. Background Art

[0002] There is a weld area every 25 meters or so on subways or other tracks. In order to ensure the safety of rail transit during operation, it is necessary to regularly perform flaw detection on the rail weld area. At present, there are two scanning flaw detection methods for rail weld areas: single ultrasonic probe and multiple ultrasonic probes. Among them, the multi-ultrasonic probe scanning flaw detection method is not only complicated to operate and inefficient, but also multiple ultrasonic probes affect each other during the flaw detection process. The scanning area of ​​a single ultrasonic probe is narrow, and the rail surface of the track has a certain width. When using a single ultrasonic probe to move and scan along the longitudinal center line of the track, it is impossible to effectively detect flaws on both sides of the rail weld area.

[0003] The invention patent with application number 202210036864.3 discloses a rail weld detection device for rail fault diagnosis, including an ultrasonic flaw detection device, a mobile device is installed at the bottom of the ultrasonic flaw detection device, the mobile device is located above the rail, a fixing device is installed inside the mobile device, and external protection devices are movably connected on both sides of the fixing device, the external protection devices are located on both sides of the rail, and the bottom of the external protection device is connected to a detection device; the rail weld detection device for rail fault diagnosis disclosed in the invention patent is actually a scanning flaw detection method of a single ultrasonic probe. During use, the single ultrasonic probe is aligned with the longitudinal center line of the rail surface for mobile scanning. Although the detection efficiency of the detection device is high, it is impossible to detect all rail surfaces in the rail weld area. In addition, since the active edge of the top surface of the rail head is in the shape of an arc, the contact surface of the probe is too small, which is not conducive to the detection of defects in the upper corners of the inner and outer sides of the weld rail head, resulting in inaccurate flaw detection results. Therefore, in view of the above-mentioned shortcomings of the existing rail weld detection device for rail fault diagnosis, this application proposes a rail weld joint scanning device that can effectively solve the above-mentioned technical problems. Utility Model Content

[0004] The utility model aims at a rail weld joint scanning device to solve the deficiency of the existing rail weld detection device for rail fault diagnosis in detecting the rail weld area.

[0005] The utility model is realized by the following technical solutions:

[0006] A rail weld joint scanning device comprises a frame and an ultrasonic probe, wherein the frame is provided with a clamping fixing portion fixed to the rail, a second moving mechanism for moving the ultrasonic probe along the length direction of the rail is provided inside the frame, and a first moving mechanism for moving the second moving mechanism along the width direction of the rail is provided inside the frame.

[0007] As a specific setting of the above scheme, the first moving mechanism includes a first screw rod arranged at one end of the inner cavity of the frame, the end of the first screw rod is connected to a first motor, and a moving block is threadedly connected to the first screw rod.

[0008] As a specific setting of the above scheme, the second moving mechanism includes a second screw rod rotatably connected to the moving block, a second motor at the end of the second screw rod, a slide rail is provided on the outer end surface of the frame, and a motor seat for installing the second motor is slidably provided on the slide rail.

[0009] As a specific setting of the above scheme, a movable seat is threadedly connected to the second screw rod, the ultrasonic probe is arranged at the lower end of the movable seat, the movable block and the motor seat are provided with a sliding rod parallel to the second screw rod, and the movable seat is provided with a protrusion matching the sliding rod.

[0010] As a further configuration of the above scheme, a rotating rod is provided on the movable seat, a first gear is connected to the lower end of the rotating rod, a second gear is provided on the pin connecting the ultrasonic probe and the movable seat, and the second gear is meshed with the first gear.

[0011] As a specific setting of the above scheme, the clamping and fixing part includes a convex plate arranged at the lower ends of the front and rear sides of the frame, and a fastening screw is threadedly connected to the convex plate, and the inner end of the fastening screw is connected to a clamping plate acting on the side of the track. Beneficial Effects

[0012] The rail weld joint scanning device disclosed by the utility model utilizes a second moving mechanism to move the ultrasonic probe along the length direction of the rail, and realizes flaw detection on a wide area of ​​the rail during the movement, and then utilizes a first driving mechanism to gradually move and adjust the position of the second moving mechanism relative to the width of the rail, and after the adjustment is completed, it is moved again along the length direction of the rail for flaw detection, and the above flaw detection process is repeated multiple times so that the ultrasonic probe moves in an S-shaped circuitous manner for flaw detection, thereby realizing all-round flaw detection of the rail weld area and effectively ensuring the accuracy of the flaw detection results.

[0013] The rail weld joint scanning inspection device has been further improved in design. The eccentric angle between the ultrasonic probe and the center line of the track is first adjusted, and then the defects inside and outside the weld rail head are detected by using the reflected wave of the rail jaw during the process of moving the ultrasonic probe for flaw detection. This effectively solves the problem of being unable to perform effective all-round flaw detection due to the arc-shaped ends of the track. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from a first angle;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from a second angle;

[0017] Figure 3 It is a schematic diagram of the internal plane structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the movable seat, ultrasonic probe, etc. in the utility model;

[0019] Figure 5 It is a schematic diagram of the moving path of the ultrasonic probe in the flaw detection process of the utility model. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 5 , and describes the application in detail with reference to embodiments. Example 1

[0022] Embodiment 1 discloses a rail weld joint scanning device, see the attached Figure 1 , Attachment Figure 2 and attached Figure 3 , including a frame 1 covering the rail weld area, a controller 100 is arranged on the frame 1, and clamping fixing parts are arranged at the lower ends of the front and rear sides of the frame 1, so that the entire frame 1 can be fixed on the rail to be inspected.

[0023] Specifically, the clamping and fixing part includes a convex plate 2 connected to the lower end of the side of the frame 1, a fastening screw 3 is threadedly connected to the convex plate 2, and a clamping plate 4 adapted to the side of the track is connected to the inner end of the fastening screw 3. The structural design of the above-mentioned clamping and fixing part can make the clamping plates 4 on both sides abut against the two sides of the track at the same time by rotating the fastening screw 3, thereby clamping and fixing the entire frame 1. In addition, the entire frame 1 can also be directly fixed on the two sides of the track by electromagnetically attracting the side plates.

[0024] A first screw rod 5 is provided at one end of the inner cavity of the frame 1, and a first motor 6 connected to the first screw rod 5 is provided on the outer side of the frame 1. A moving block 7 is threadedly connected to the first screw rod 5, one side of the moving block 7 is in contact with the end wall of the frame 1, and a second screw rod 8 is rotatably connected to the other side through a bearing, and the second screw rod 8 is arranged perpendicular to the first screw rod 5. A slide rail 9 is provided on the other end face of the frame 1, a motor seat 10 is slidably provided on the slide rail 9, and then a second motor 11 is fixedly installed on the motor seat 10, and the motor shaft of the second motor 11 is connected to the other end of the second screw rod 8, and a slide rod 12 parallel to the second screw rod 8 is also provided between the motor seat 10 and the moving block 7. The above structural design can realize the position movement of the second screw rod 8 and the second motor 11 along the width direction of the track through the action of the first motor 6 and the first screw rod 5.

[0025] Reference Figure 4 A movable seat 13 is threadedly connected to the second screw rod 8, and a protrusion 14 is arranged on one side of the movable seat 13. A sliding block adapted to the sliding rod 12 is opened on the protrusion 14, and then an ultrasonic probe 15 is arranged on the lower surface of the movable seat 13, and the ultrasonic probe 15 is connected to the external display device through an electric wire.

[0026] During use of the rail weld joint scanning device disclosed in the present embodiment 1, the entire frame 1 is first clamped and fixed on the rail weld area by the fastening screws 3 and the clamping plates 4 on both sides, and then the first motor 6 is started, and the second screw rod 8 and the second motor 11 are driven to the outermost side in the width direction of the rail through the action of the first screw rod 5 and the moving block 7. Next, the second motor 11 and the ultrasonic probe 15 are started at the same time, so that the ultrasonic probe 15 performs flaw detection along the length direction of the rail. When the ultrasonic probe 15 moves to the end of the second screw rod 8, the second motor 11 is turned off and the first motor 6 is started, and the second screw rod 8 and the second motor 11 are moved a certain distance in the direction of the center line of the rail again through the action of the first screw rod 5 and the moving block 7. At this time, the second motor 11 is driven in the reverse direction, so that the ultrasonic probe 15 moves in the reverse direction along the length direction of the rail again, and the ultrasonic probe 15 is used to perform flaw detection during the movement. Repeat the above steps several times, so that the ultrasonic probe moves in an S-shaped circuitous manner for flaw detection (refer to the attached Figure 5) until all-round flaw detection of the rail weld area is completed. Example 2

[0027] Embodiment 2 discloses a rail weld joint scanning device which is improved and designed based on the technical solution in Embodiment 1. The similarities between Embodiment 2 and Embodiment 1 are not described again. The differences between them are shown in the attached drawings. Figure 4 .

[0028] In this embodiment 2, a rotating rod 16 is rotatably arranged on the movable seat 13, a screw cap is arranged on the upper end of the rotating rod 16, and a first gear 17 is connected to the lower end of the rotating rod 16. A second gear 18 is arranged on the pin connecting the ultrasonic probe 15 and the movable seat 13, and the second gear 18 is meshed with the first gear 17.

[0029] In this embodiment 2, the ultrasonic probe 15 is rotated to an angle of about 15° with the center line of the track through the design of the rotating rod 16, the first gear 17 and the second gear 18, and then the adjusted flaw detection probe 15 is moved along the direction of the center line of the track, and then rotated in the opposite direction by about 15° and moved again for flaw detection. Through the above-mentioned mobile flaw detection process, the defects inside and outside the weld rail head can be detected by using the reflected wave of the rail jaw.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rail weld joint scanning device, comprising a frame and an ultrasonic probe, wherein the frame is provided with a clamping and fixing portion fixed to the rail, characterized in that: The frame is provided with a second moving mechanism for moving the ultrasonic probe along the length direction of the track, and the frame is provided with a first moving mechanism for moving the second moving mechanism along the width direction of the track.

2. The rail weld joint scanning device according to claim 1, characterized in that: The first moving mechanism includes a first screw rod arranged at one end of the inner cavity of the frame, the end of the first screw rod is connected to a first motor, and a moving block is threadedly connected to the first screw rod.

3. The rail weld joint scanning device according to claim 2, characterized in that: The second moving mechanism includes a second screw rod rotatably connected to the moving block, a second motor at the end of the second screw rod, a slide rail is arranged on the outer end surface of the frame, and a motor seat for mounting the second motor is slidably arranged on the slide rail.

4. The rail weld joint scanning device according to claim 3 is characterized in that: The second screw is threadedly connected with a moving seat, the ultrasonic probe is arranged at the lower end of the moving seat, the moving block and the motor seat are provided with a sliding rod parallel to the second screw, and the moving seat is provided with a protrusion matching the sliding rod.

5. The rail weld joint scanning device according to claim 4, characterized in that: The movable seat is provided with a rotating rod, the lower end of which is connected with a first gear, and the pin connecting the ultrasonic probe and the movable seat is provided with a second gear, which is meshed with the first gear.

6. The rail weld joint scanning device according to claim 1, characterized in that: The clamping and fixing part includes a convex plate arranged at the lower ends of the front and rear sides of the frame, a fastening screw is threadedly connected to the convex plate, and the inner end of the fastening screw is connected to a clamping plate acting on the side of the track.

Images