Flaw detection trolley and flaw detection car

Abstract

The embodiment of the utility model provides a flaw detection trolley and a flaw detection car, and the flaw detection trolley comprises a trolley frame; a vertical driving mechanism and a transverse driving mechanism are arranged on the trolley frame, and the vertical driving mechanism and the transverse driving mechanism are respectively used for being connected to a flaw detection trolley body; the flaw detection bracket is arranged on the trolley frame; flaw detection brackets are arranged on two sides of the trolley frame; the corner driving mechanism is arranged on the flaw detection bracket and is used for connecting the flaw detection device and driving the flaw detection device to rotate in a plane vertical to the longitudinal direction; the longitudinal direction is the rail extension direction; and the trolley wheels are arranged at the bottom end of the trolley frame and can walk along the track. According to the flaw detection trolley and the flaw detection car provided by the embodiment of the invention, the position of the flaw detection device can be adjusted in time through the corner driving mechanism according to the position of the steel rail in the walking process so as to follow the position change of the rail, and the flaw detection accuracy of the steel rail is improved.

Description

Technical Field

[0001] This application relates to railway maintenance technology, and more particularly to a flaw detection trolley and flaw detection vehicle. Background Technology

[0002] Existing rail flaw detection devices are typically mounted on the bogie of the flaw detection vehicle, and the devices themselves have angle deflection and lateral movement functions. Due to factors such as the bogie wheels and axles being a single unit, the wheel treads having equivalent tapers, and the rails having rail bottom slopes, the bogie exhibits a serpentine movement when traveling in a straight line, resulting in a significant deviation between the position of the flaw detection device and the rail.

[0003] Although existing rail flaw detection devices have their own angle deflection and lateral movement functions, which can compensate for the position of the flaw detection device to a certain extent and minimize the positional deviation of the flaw detection device relative to the rail, the randomness of bogie movement still results in a certain degree of deviation in the position of the flaw detection device relative to the rail, causing some distortion in the collected flaw detection data. Summary of the Invention

[0004] To address one of the aforementioned technical deficiencies, this application provides a flaw detection trolley and a flaw detection vehicle.

[0005] According to a first aspect of the embodiments of this application, a flaw detection cart is provided, comprising:

[0006] The trolley frame is equipped with a vertical drive mechanism and a lateral drive mechanism, which are respectively used to connect to the flaw detection vehicle body.

[0007] Flaw detection brackets are installed on the trolley frame; flaw detection brackets are installed on both sides of the trolley frame.

[0008] An angle drive mechanism, mounted on the flaw detection bracket, is used to connect the flaw detection device and drive it to rotate in a plane perpendicular to the longitudinal direction; the longitudinal direction is the direction of track extension.

[0009] The small wheels are located at the bottom of the trolley frame and can travel along the track.

[0010] According to a second aspect of the embodiments of this application, a flaw detection vehicle is provided, including: the flaw detection trolley as described above.

[0011] The technical solution provided in this application embodiment includes a vertical drive mechanism and a lateral drive mechanism on the trolley frame, which are respectively connected to the flaw detection vehicle body. A flaw detection bracket is installed on the trolley frame. Flaw detection brackets are installed on both sides of the trolley frame. A corner drive mechanism is installed on the flaw detection bracket and is used to connect the flaw detection device and drive the flaw detection device to rotate in a plane perpendicular to the longitudinal direction. The longitudinal direction is the direction of track extension. Small wheels are installed at the bottom of the trolley frame and can travel along the track. During travel, the position of the flaw detection device can be adjusted in time according to the position of the rail through the corner drive mechanism to follow the changes in the track position and improve the accuracy of flaw detection on the rail. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0013] Figure 1 This is a schematic diagram of the flaw detection trolley on the rail provided in an embodiment of this application;

[0014] Figure 2 A schematic diagram of the flaw detection trolley on the rail from another angle, provided in an embodiment of this application;

[0015] Figure 3 This is a schematic diagram of the structure of the flaw detection cart provided in the embodiments of this application;

[0016] Figure 4 for Figure 3 A magnified view of area A in the middle;

[0017] Figure 5 for Figure 3 A magnified view of area B in the middle;

[0018] Figure 6 A schematic diagram of the flaw detection vehicle provided in the embodiments of this application from a bottom-view angle;

[0019] Figure 7 for Figure 6 A magnified view of area C in the middle;

[0020] Figure 8 for Figure 6 A magnified view of region D in the middle;

[0021] Figure 9 A schematic diagram of the flaw detection cart provided in this application embodiment without the flaw detection device;

[0022] Figure 10 A bottom-view diagram of the flaw detection cart provided in this embodiment of the application without the flaw detection device;

[0023] Figure 11 for Figure 10 A magnified view of area F in the middle;

[0024] Figure 12 A schematic diagram of the flaw detection device in the flaw detection cart is provided for the embodiments of this application;

[0025] Figure 13 Another structural schematic diagram of the flaw detection device in the flaw detection cart is provided for the embodiments of this application;

[0026] Figure 14 This application provides another structural schematic diagram of the flaw detection device in the flaw detection cart.

[0027] Figure label:

[0028] 1-Trolley frame; 11-Frame body; 111-Top longitudinal beam; 112-Vertical beam; 113-Auxiliary wheel frame; 114-Auxiliary wheel; 12-Frame connecting mechanism; 121-Intermediate frame; 122-Hinged rod; 13-Gap adjustment mechanism; 131-Gap driver; 132-Gap swing arm; 133-Drive shaft; 134-Coupling; 135-Push rod; 136-Adapter; 137-Shaft sleeve; 138-Connector; 14-Gap baffle;

[0029] 2-Flaw detection bracket; 21-Upper connecting beam; 22-Lower connecting beam; 23-Corner bracket;

[0030] 3-Corner drive mechanism; 31-Corner driver; 32-Corner swing arm;

[0031] 4-Small wheels;

[0032] 5-Vertical drive mechanism;

[0033] 6- Lateral drive mechanism;

[0034] 7- Rails;

[0035] 8-Flaw detection device; 81-Flaw detection frame; 82-Transverse drive; 83-Vertical drive; 85-Flaw detection wheel frame; 86-Flaw detection wheel; 87-Water film nozzle; 88-Rail profile detection bracket; 89-Rail profile detector;

[0036] 9-Sensor. Detailed Implementation

[0037] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0038] This embodiment provides a flaw detection trolley that can be used in flaw detection vehicles for flaw detection of rails on railway lines.

[0039] In this embodiment, the direction of rail extension is called longitudinal, and the length direction of the flaw detection trolley is called longitudinal; the width direction of rail is called transverse, and the width direction of flaw detection trolley is called transverse; the direction from the top of rail to the bottom of rail is called vertical, and the height direction of flaw detection trolley is called vertical.

[0040] like Figures 1 to 3 As shown, the flaw detection trolley provided in this embodiment includes: trolley frame 1, flaw detection bracket 2, corner driver 3, and trolley wheels 4.

[0041] The trolley frame 1 can be mounted on the body of the flaw detection vehicle. The trolley frame 1 is equipped with a vertical drive mechanism 5 and a lateral drive mechanism 6. The vertical drive mechanism 5 and the lateral drive mechanism 6 are respectively connected to the flaw detection vehicle body. The vertical drive mechanism 5 drives the trolley frame 1 to move vertically relative to the flaw detection vehicle body, and the lateral drive mechanism 6 drives the trolley frame 1 to move laterally relative to the flaw detection vehicle body. The vertical drive mechanism 5 and the lateral drive mechanism 6 can be either pneumatic cylinders or hydraulic cylinders.

[0042] After the flaw detection vehicle reaches the working position, the vertical drive mechanism 5 drives the trolley frame 1 to move vertically and lower it to the detection height. Then, the lateral drive mechanism 6 drives the trolley frame 1 to move laterally and adjust its position to align with the rail for inspection. The trolley frame 1 can be moved vertically and laterally multiple times using the vertical drive mechanism 5 and the lateral drive mechanism 6 until it is accurately moved to the detection position. After the inspection is completed, the flaw detection trolley is returned to its initial position using the vertical drive mechanism 5 and the lateral drive mechanism 6.

[0043] Flaw detection bracket 2 is installed on the trolley frame 1. The flaw detection bracket 2 is used to install the flaw detection device 8, which is used to detect flaws in the rails. Flaw detection brackets 2 are installed on both sides of the trolley frame 1, and each flaw detection bracket 2 is equipped with a flaw detection device 8. During the movement of the flaw detection vehicle, flaw detection can be performed on the rails on both sides simultaneously.

[0044] An angle drive mechanism 3 is mounted on the flaw detection bracket 2. It connects the flaw detection device 8 and drives the flaw detection device 8 to rotate in a plane perpendicular to the longitudinal direction. It can adjust the vertical height and the lateral position, so as to flexibly adjust the position of the flaw detection device 8 according to the position of the rail. An angle drive mechanism 3 is provided on both the left and right sides of the trolley frame 1 to drive the corresponding flaw detection device 8 to move.

[0045] The small wheels 4 are located at the bottom of the trolley frame 1 and can travel along the rails 7. The position of the rails can be monitored in real time during travel, and the position of the flaw detection device 8 can be adjusted in a timely manner through the corner drive mechanism 3 to follow the position changes of the rails and achieve accurate flaw detection.

[0046] The technical solution provided in this embodiment includes a vertical drive mechanism and a lateral drive mechanism on the trolley frame, which are respectively connected to the flaw detection vehicle body. A flaw detection bracket is installed on the trolley frame. Flaw detection brackets are installed on both sides of the trolley frame. A corner drive mechanism is installed on the flaw detection bracket to connect the flaw detection device and drive the flaw detection device to rotate in a plane perpendicular to the longitudinal direction. The longitudinal direction is the direction of track extension. Small wheels are installed at the bottom of the trolley frame and can travel along the track. During travel, the position of the flaw detection device can be adjusted in time according to the position of the rail through the corner drive mechanism to follow the changes in the track position and improve the accuracy of flaw detection on the rail.

[0047] Based on the above technical solution, this embodiment provides an implementation method for the car frame 1: as follows Figure 3 , Figure 6 and Figure 9 As shown, the trolley frame 1 includes: two frame bodies 11, a frame connecting mechanism 12, and a track gauge adjustment mechanism 13. The two frame bodies 11 are arranged side-by-side, and each frame body 11 is equipped with a flaw detection device 8. The frame connecting mechanism 12 connects the two frame bodies 11, and the track gauge adjustment mechanism 13 is connected to the two frame bodies 11 to adjust the distance between them.

[0048] The above scheme allows the distance between the two main frame bodies 11 to be adjusted according to the position of the rails, thereby adjusting the lateral position of the flaw detection device 8, which further improves the flexibility of the flaw detection device 8 in movement and the accuracy of flaw detection on the rails.

[0049] One embodiment is as follows: The frame body 11 includes a top longitudinal beam 111 and a vertical beam 112, wherein the top longitudinal beam 111 extends longitudinally and is a square tube beam. A flaw detection bracket 2 is installed at the middle of the top longitudinal beam 111. The vertical beam 112 extends vertically, with its top end connected to the end of the top longitudinal beam 111. Both ends of the top longitudinal beam 111 are connected to the vertical beam 112. A small wheel 4 is installed at the bottom end of the vertical beam 112, and the bottom end of the vertical drive mechanism 5 is connected to the end of the top longitudinal beam 111. The vertical beam 112 can also be a square tube beam or other shapes.

[0050] Furthermore, an auxiliary wheel frame 113 is adopted and mounted on the trolley frame 1. Specifically, the auxiliary wheel frame 113 is connected to the end of the top longitudinal beam 111 or to the vertical beam 112. The auxiliary wheel 114 is located at the bottom end of the auxiliary wheel frame 113, and the bottom end of the auxiliary wheel 114 is higher than the bottom end of the trolley wheel 4. When the flaw detection trolley passes through the fork and the wide rail gap, the trolley wheel 4 and the auxiliary wheel 114 provide joint support, thus minimizing the vertical displacement of the flaw detection trolley.

[0051] For the aforementioned corner drive mechanism, this embodiment provides one implementation method: as follows Figure 4 , Figure 6 and Figure 7 As shown, the corner drive mechanism 3 includes a corner driver 31 and a corner swing arm 32. The corner driver 31 is mounted on the flaw detection bracket 2 and connected to the flaw detection device 8. The corner driver 31 can be a pneumatic cylinder or a hydraulic cylinder, and its stroke direction is laterally, thus applying a lateral driving force to the flaw detection device 8.

[0052] One end of the angled swing arm 32 is hinged to the flaw detection device 8, and the other end is connected to the flaw detection bracket 2. The angled swing arm 32 can rotate relative to both the flaw detection device 8 and the flaw detection bracket 2. When the angled actuator 31 applies a lateral force to the flaw detection device 8, it pushes the flaw detection device 8 to rotate in a plane perpendicular to the longitudinal direction.

[0053] One specific implementation is as follows: two corner swing arms 32 are arranged laterally at intervals and connected between the flaw detection device 8 and the flaw detection bracket 2 respectively, so as to form a symmetrical structure at the bottom, support the flaw detection device 8 to swing, and improve the stability of the flaw detection device 8.

[0054] This embodiment also provides an implementation method for the flaw detection bracket 2: as follows Figure 4 , Figure 7 , Figure 9 As shown, the flaw detection bracket 2 includes an upper connecting beam 21, a lower connecting beam 22, and a corner bracket 23. The upper connecting beam 21 is a portal beam, with its middle part connected to the top longitudinal beam 111 and perpendicular to the top longitudinal beam 111.

[0055] The lower connecting beam 22 extends laterally, and its two ends are connected to the two ends of the upper connecting beam 21, respectively. The lower connecting beam 22 has pin holes and is hinged to the end of the corner swing arm 32 through connecting pins.

[0056] Angle bracket 23 is connected to the end of the upper connecting beam 21, and angle actuator 31 is fixed to the angle bracket 23. The angle bracket 23 has a V-shaped structure, with its tip pointing towards the outside of the trolley frame 1. The angle actuator 31 is located at the tip of the angle bracket 23.

[0057] This embodiment is in Figure 4 The flaw detection device 8 marked has removed the flaw detection mechanism, leaving only the flaw detection frame used to install the flaw detection mechanism. The simplified structure is used to show the structure of the flaw detection bracket 2.

[0058] Based on the above technical solution, this embodiment provides an implementation method for the frame connection structure 12: as follows Figure 5 , Figure 6 , Figure 5 As shown, the frame connection structure includes an intermediate frame 121 and a hinge rod 122. Hinges are provided on both sides of the intermediate frame 121, and each hinge has a hinge hole. One end of the hinge rod 122 is connected to the hinge hole via a pin, and the other end is connected to the hinge hole of the hinge on the frame body 11. This allows the intermediate frame 121 to swing relative to the frame body 11 via the hinge rod 122, thereby adjusting the distance between the two frame bodies 11 and further adjusting the position of the flaw detection device according to changes in the track position.

[0059] A frame connection mechanism 12 is provided at both ends of the frame body 11, and the frame connection mechanisms 12 at both ends are connected by a longitudinally extending intermediate beam.

[0060] One embodiment: The hinges on both sides of the intermediate frame are provided with two hinge holes, one above the other, and are connected to the frame body 11 by two parallel hinge rods 122. The two hinge rods 122 form a parallelogram with the frame body 11 and the intermediate frame 121, which can produce stable deformation.

[0061] Furthermore, the top of the intermediate frame 121 is provided with a connecting seat for connecting to the transverse drive mechanism 6. The connecting seat has a connecting hole and is connected to the transverse drive mechanism 6 through a connector.

[0062] Furthermore, a limiting structure can be provided between the two frame bodies 11 to limit the lateral movement range of the two frame bodies 11.

[0063] Based on the above technical solution, this embodiment also provides an implementation method for the track gauge adjustment mechanism 13. For example... Figure 8 , Figure 5 , Figure 10 , Figure 11 As shown, the track gauge adjustment mechanism 13 includes: a track gauge driver 131, a track gauge swing arm 132, a drive shaft 133, a coupling 134, a push rod 135, and an adapter 136.

[0064] The track gauge actuator 131 can be fixed to the intermediate beam or to other components. The track gauge actuator 131 can be a pneumatic cylinder or a hydraulic cylinder. One end of the track gauge swing arm 132 is hinged to the track gauge actuator 131, and the other end is fixedly connected to the drive shaft 133. The track gauge actuator 131 applies a pushing or pulling force to one end of the track gauge swing arm 132, causing the track gauge swing arm 132 to drive the drive shaft 133 to rotate.

[0065] The adapter 136 is mounted on the drive shaft 133 and rotates synchronously with it. The adapter 136 is connected to two push rods 135. The two push rods 135 are located on the left and right sides of the drive shaft 133, and are connected to the corresponding frame body 11 on the same side. Under the drive of the track gauge driver 131, the adapter 136 and the drive shaft 133 rotate, causing the two push rods 135 to move outwards or inwards, thereby pushing the two frame bodies 11 outwards to increase their distance, or inwards to decrease their distance.

[0066] Furthermore, the two ends of the trolley frame 1 are respectively provided with a set of track gauge driver 131, track gauge swing arm 132, and drive shaft 133. The two drive shafts 133 are connected by a coupling 134, so that the front and rear rails restrain and influence each other.

[0067] Furthermore, a rotating shaft sleeve 137 is used, and the drive shaft 133 passes through the rotating shaft sleeve 137 and rotates relative to the rotating shaft sleeve 137. A connecting member 138 is used to fix the rotating shaft sleeve 137 to the aforementioned intermediate beam. The connecting member 138 has a circular hole, and the rotating shaft sleeve 137 passes through the circular hole.

[0068] Furthermore, such as Figure 5 As shown, a gauge baffle 14 is installed on the inner side of the frame body 11, and a gauge baffle tie rod 15 extending laterally is used. Its left end is connected to the left side of the frame body 11, and its right end is connected to the right side of the gauge baffle 14. When crossing a turnout, the gauge baffle 14 rests against the guard rail, and the right side of the gauge baffle 14 pulls the left wheel, and vice versa, so that the trolley does not derail.

[0069] Based on the above technical solutions, this embodiment also provides an implementation method for the flaw detection device 8. For example... Figure 12 , Figure 13 , Figure 14As shown, the flaw detection device 8 includes: a flaw detection frame 81, a transverse drive 82, a vertical drive 83, and flaw detection devices. The flaw detection frame 81 is connected to the corner drive mechanism 3 and also to the lower connecting beam 22 in the flaw detection bracket 2, specifically via a corner swing arm 32.

[0070] A transverse actuator 82 is mounted on the flaw detection frame 81 and connected to the flaw detection device. The transverse actuator 82 can be a pneumatic cylinder or a hydraulic cylinder, used to drive the flaw detection device to move laterally. A transverse guide rail is also provided, along which the flaw detection device moves.

[0071] The flaw detection device includes: a flaw detection frame, a flaw detection wheel frame 85, and flaw detection wheels 86 mounted on the flaw detection wheel frame 85. Multiple flaw detection wheels 86 are used to detect flaws in the rail from different angles. The flaw detection wheel frame 85 is mounted on the flaw detection frame, which is connected to a lateral movement driver 82. A vertical driver 83 is mounted on the flaw detection frame and connected to the flaw detection wheel frame 85, used to drive the flaw detection wheel frame 85 to move vertically.

[0072] Furthermore, a vertical guide component is used, which is connected to the flaw detection wheel frame 85, to limit the vertical movement of the flaw detection wheel frame 85.

[0073] Furthermore, a water film nozzle 87 is used, which is set at the bottom of the flaw detection wheel frame 85, for spraying water film onto the rail to perform flaw detection using ultrasonic waves.

[0074] Furthermore, a rail profile detection bracket 88 is mounted on the flaw detection frame 81, and a rail profile detector 89 is mounted at the bottom of the rail profile detection bracket 88 to detect the rail profile and thus determine the rail position. The position of the flaw detection device can be automatically adjusted based on the detected rail position data.

[0075] In addition, such as Figure 3 As shown, a sensor 9 is also provided on the frame body 11, for example, at the bottom end of the vertical beam 112, next to the small wheel 4, to detect whether the small wheel 4 is on the rail. The sensor 9, the vertical drive mechanism 5, and the lateral drive mechanism 6 form a closed-loop control, which enables the trolley to automatically retract and extend.

[0076] Based on the above technical solutions, this embodiment also provides a flaw detection vehicle, including the flaw detection trolley as described in any of the above contents, which has the same technical effects as the flaw detection trolley described above.

[0077] The flaw detection trolley provided in this embodiment has a rail-aligning function and small vertical fluctuation. It has its own angle deflection and lateral movement functions to keep the position of the flaw detection device relative to the rail constant. During operation, it automatically adapts to the rail conditions, so that the collected flaw detection data is as close as possible to the rail conditions, reducing the distortion rate of directly collected flaw detection data and reducing the amount of data processing.

[0078] The above-described scheme ensures that the position of the flaw detection wheel 86 relative to the rail 7 remains essentially unchanged. When the rail has no side wear or thick edges, the rail profile detector 89 on the flaw detection device measures the rail position as essentially unchanged, and the data measured by the flaw detection wheel 86 is the actual data of the rail, resulting in a very small amount of data processing. However, when the rail has side wear and thick edges, the amount of data processing is relatively larger. But because the position change has a certain regularity, the lateral movement and rotation on the flaw detection device are easy to compensate for, making data processing convenient and resulting in a high accuracy rate of the processed data.

[0079] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0081] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0082] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0083] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A flaw detection cart, characterized in that, include: Car frame; The trolley frame is equipped with a vertical drive mechanism and a lateral drive mechanism, which are respectively used to connect to the flaw detection vehicle body. Flaw detection brackets are installed on the trolley frame; flaw detection brackets are installed on both sides of the trolley frame. An angle drive mechanism, mounted on the flaw detection bracket, is used to connect the flaw detection device and drive it to rotate in a plane perpendicular to the longitudinal direction; the longitudinal direction is the direction of track extension. The small wheels are located at the bottom of the trolley frame and can travel along the track.

2. The flaw detection cart according to claim 1, characterized in that, The trolley frame includes: two frame bodies, a frame connecting mechanism, and a track gauge adjustment mechanism; the frame connecting mechanism is connected between the two frame bodies, and the track gauge adjustment mechanism is connected to the two frame bodies to adjust the distance between the two frame bodies.

3. The flaw detection cart according to claim 2, characterized in that, The main frame includes: Top longitudinal beam; the flaw detection bracket is installed at the middle of the top longitudinal beam; A vertical beam is connected to both ends of the top longitudinal beam, and small wheels are installed at the bottom end of the vertical beam; the bottom end of the vertical drive mechanism is connected to the end of the top longitudinal beam.

4. The flaw detection cart according to claim 3, characterized in that, The corner drive mechanism includes: An angle actuator is mounted on the flaw detection bracket and connected to the flaw detection device. The corner swing arm is hinged at one end to the flaw detection device and at the other end to the flaw detection bracket.

5. The flaw detection cart according to claim 4, characterized in that, Flaw detection support includes: The upper connecting beam is a portal beam, with its middle part connected to the top longitudinal beam and perpendicular to the top longitudinal beam; The lower connecting beam extends laterally; both ends of the lower connecting beam are connected to both ends of the upper connecting beam; the end of the corner swing arm is hinged to the lower connecting beam. An angle bracket is connected to the end of the upper connecting beam, and the angle driver is fixed to the angle bracket.

6. The flaw detection cart according to claim 2, characterized in that, The frame connection structure includes: a middle frame; the two sides of the middle frame are respectively hinged to the two frame bodies via hinge rods; The top of the intermediate frame is provided with a connecting seat for connecting to the lateral drive mechanism.

7. The flaw detection cart according to claim 2, characterized in that, The track gauge adjustment mechanism includes: a track gauge driver, a track gauge swing arm, a drive shaft, a coupling, a push rod, and an adapter. One end of the track gauge swing arm is connected to the track gauge driver, and the other end is connected to the drive shaft; the adapter is set on the drive shaft and rotates synchronously with the drive shaft; the adapter is connected to two push rods respectively, and the two push rods are connected to the same side of the frame body; The trolley frame is equipped with a set of track gauge drivers, track gauge swing arms, and drive shafts at both ends, and the two drive shafts are connected by a coupling.

8. The flaw detection cart according to claim 1, characterized in that, Also includes: Auxiliary wheel bracket, mounted on the vehicle frame; The auxiliary wheel is located at the bottom of the auxiliary wheel frame; the bottom of the auxiliary wheel is higher than the bottom of the small wheel.

9. The flaw detection cart according to claim 2, characterized in that, Also includes: Flaw detection equipment; The flaw detection device includes: a flaw detection frame, a transverse actuator, a vertical actuator, and flaw detection components; The flaw detection frame is connected to the corner drive mechanism; the lateral drive and the vertical drive are mounted on the flaw detection frame and are respectively connected to the flaw detection device.

10. A flaw detection vehicle, characterized in that, include: The flaw detection trolley as described in any one of claims 1-9.

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