Automatic centering and monitoring device for rail flaw detector

Abstract

The present invention discloses an automatic centering and monitoring device for a rail flaw detector, which is characterized in that it comprises: an outer frame and a horizontal adjustment part, a horizontal detection part and a probe wheel fixing part installed on the outer frame; the horizontal adjustment part comprises a horizontal guide fixed on the outer frame, a horizontal support part slidably connected to the horizontal guide part, and a horizontal driving part for driving the horizontal support part to horizontally displace along the horizontal guide part; the horizontal detection part is provided with a horizontal sensor for detecting the horizontal position of the horizontal adjustment part, the horizontal sensor is connected to the horizontal driving part by signal, and the probe wheel fixing part is used to fix the probe wheel of the rail flaw detector, wherein, in response to the horizontal adjustment signal of the horizontal sensor, the horizontal driving part drives the horizontal support part to adjust the horizontal position, so as to drive the probe wheel fixing part to automatically center with the rail. The present invention realizes automatic control, and automatically alarms and resets when the probe wheel offset exceeds a preset value, so that the probe wheel always remains coupled with the top surface of the guide rail.

Description

Technical Field

[0001] The invention belongs to the technical field of rail flaw detection, and in particular relates to an automatic centering and monitoring device for a rail flaw detector. Background Art

[0002] As the main artery of the national economy, railway is one of the most important infrastructures of the country and the most popular mode of transportation for every citizen. In my country, with the increase of train speed and axle weight, coupled with the thermal expansion and contraction of metals due to environmental reasons, the speed of rail damage has also accelerated accordingly, making the detection cycle also tend to be shortened. Rail flaw detection is an important measure to ensure railway driving safety.

[0003] The main method of rail flaw detection in my country is ultrasonic testing, which mainly uses large flaw detection vehicles and small flaw detectors to detect rails. Large flaw detection vehicles have a fast flaw detection speed and are well adapted to the rapidly developing railway industry in my country. However, due to the high equipment cost and poor flexibility of large flaw detection vehicles, they have not been widely used in rail inspection. Small flaw detectors are placed on small carts and are manually pushed or driven autonomously to detect the sections to be inspected. Because of their small size and light weight, one or two rail flaw detectors can move them on or off the track, thereby flexibly using the gaps between trains to perform flaw detection operations on the track.

[0004] The flaw detector detects rail damage based on the ultrasonic echo reflected by the rail damage. When using an ultrasonic probe for rail flaw detection, the 0° ultrasonic probe must be aligned with the geometric center line of the rail cross section. When the ultrasonic probe is aligned with the center line of the rail cross section, if the rail is not damaged, the ultrasonic probe can receive a relatively strong rail bottom echo (bottom wave) signal; if the rail is damaged, the ultrasonic probe will receive the damage echo signal, thereby detecting the rail damage. When the ultrasonic probe deviates from the rail, the bottom wave signal strength will weaken or even disappear, making it difficult or even impossible to detect rail damage. However, in the prior art, during high-speed flaw detection operations, the double-track flaw detection vehicle suffers from an intensified serpentine motion, which affects the operation of the ultrasonic probe wheel. Manual adjustment can be used to place the probe wheel in the optimal position during calibration before the operation, but manual adjustment cannot meet the needs of flaw detection operations during high-speed flaw detection operations. In addition, when a harmful space in a branch track is detected, the probe wheel often detaches from the track. When the trolley is put back on track, the probe wheel must be adjusted again to ensure a good coupling between the probe wheel and the top surface of the track, which greatly increases manual labor. Summary of the invention

[0005] The technical purpose of the present invention is to provide an automatic centering and monitoring device for a rail flaw detector to solve the technical problem that the serpentine motion of the rail flaw detector is aggravated during high-speed flaw detection operation and manual adjustment cannot enable the ultrasonic detection wheel to maintain normal detection.

[0006] To solve the above problems, the technical solution of the present invention is:

[0007] The present invention discloses an automatic centering and monitoring device for a rail flaw detector, comprising: an outer frame and a horizontal adjustment part, a horizontal detection part and a probe wheel fixing part installed on the outer frame; the horizontal adjustment part comprises a horizontal guide fixed on the outer frame, a horizontal support slidably connected to the horizontal guide, and a horizontal driving part for driving the horizontal support to move horizontally along the horizontal guide; the horizontal detection part is provided with a horizontal sensor for detecting the horizontal position of the horizontal adjustment part, the horizontal sensor is connected to the horizontal driving part by signal, and the probe wheel fixing part is used to fix the probe wheel of the rail flaw detector, wherein, in response to the horizontal adjustment signal of the horizontal sensor, the horizontal driving part drives the horizontal support part to adjust the horizontal position, so as to drive the probe wheel fixing part to automatically align with the rail.

[0008] Wherein, the horizontal guide member is an optical axis, and the optical axis is fixed to both sides of the outer frame along the moving direction of the horizontal support member;

[0009] The horizontal support member is a horizontal support plate. Both sides of the horizontal support plate are provided with sliding pipes which are sleeved on the optical axis and slidably connected with the optical axis.

[0010] The horizontal driving member is an electric push rod, a hydraulic push rod or a pneumatic push rod, which is fixed on the outer frame and drivingly connected to the horizontal support member, and drives the horizontal support member to move horizontally with the outer frame as support.

[0011] The horizontal detection part includes a sensor support member fixed to the horizontal support member, a sensor bracket detachably connected to the sensor support member, and a sensor mounting member for mounting the horizontal sensor.

[0012] Specifically, one end of the sensor bracket is detachably connected to one end of the sensor support member along the travel direction of the rail flaw detector, the connection between the sensor bracket and the sensor support member is located in the middle of the end surface of the sensor support member, and the other end of the sensor bracket is fixedly connected to the sensor mounting member. The sensor mounting member includes a bottom plate, side plates connected to the bottom plate and arranged parallel to each other, a guide shaft is arranged between the side plates, a horizontal sensor and a linear bearing are sleeved on the guide shaft, the horizontal sensor includes a first horizontal sensor and a second horizontal sensor, and the linear bearing is used to adjust the distance between the first horizontal sensor and the second horizontal sensor.

[0013] Further preferably, it also includes an angle adjustment part, which includes an arc-shaped guide member fixed on the horizontal support member, an angle support member slidably connected to the arc-shaped guide member, and an angle driving member for driving the angle support member to adjust the angle along the arc-shaped guide member, and the angle support member is connected to the probe wheel fixing member, wherein the center of the guide arc of the arc-shaped guide member is located at the center position of the probe wheel fixed by the probe wheel fixing member.

[0014] Wherein, the arc-shaped guide member is an arc-shaped guide rail or an arc-shaped guide groove, and the arc-shaped guide member is fixed to both sides of the horizontal support member along the angle adjustment direction of the angle support member;

[0015] The angle support member is an angle support plate, and sliders or pulleys slidably connected to the arc-shaped guide member are arranged on both sides of the angle support plate; the end surface of the angle support plate away from the horizontal support plate is connected to the detection wheel fixing part.

[0016] Among them, the angle driving member is an electric push rod, a hydraulic push rod or a pneumatic push rod, and an angle adjustment frame is provided on the end of the horizontal support member where the arc-shaped guide member is not provided. The angle driving member is fixed on the angle adjustment frame and is connected to the angle support member driving, and the angle adjustment frame is used as a support to push the angle support member to adjust the angle.

[0017] Further preferably, it also includes a vertical adjustment bolt, the angle support plate is connected to the probe wheel fixing part via the vertical adjustment bolt, and the vertical adjustment bolt is used to adjust the vertical displacement of the probe wheel fixing part and the angle support plate.

[0018] Specifically, the outer frame is provided with guide wheels and guide plows on both sides of the probe wheel fixing part along the track direction;

[0019] The guide wheels are used to make the flaw detection trolley close to the guide rails;

[0020] The guide plow is used to prevent the flaw detection trolley from derailing or falling off the track when passing through the harmful space of the switch.

[0021] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0022] 1) The present invention uses a horizontal sensor to detect the offset of the probe wheel. When the flaw detection vehicle is moving at high speed, when the offset of the probe wheel exceeds a preset value, the horizontal sensor generates a signal, an alarm is sounded in the flaw detection software, and the horizontal support member is adjusted by the horizontal driving member to reset the ultrasonic probe wheel, thereby realizing automatic control, improving detection accuracy and reducing manual labor;

[0023] 2) The horizontal adjustment part, the horizontal detection part and the probe wheel fixing part in the present invention are independently movable with the flaw detection trolley as a reference. When the flaw detection trolley is in a serpentine motion, it can also achieve automatic reset, and the probe wheel remains basically stationary in the horizontal direction of the guide rail, so that the probe wheel always remains coupled with the top surface of the guide rail;

[0024] 3) The present invention is equipped with a guide wheel, a guide plow and an elastic component. Under the action of the elastic component, the guide wheel is closely attached to the working surface of the track, ensuring that the ultrasonic detection wheel can always run on the center line of the rail; the guide plow is used to prevent the flaw detection trolley from derailing or falling off the track when passing through the harmful space of the switch, thereby improving safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the following detailed description of the preferred embodiment.The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting the invention.

[0026] Figure 1 It is a structural schematic diagram of the automatic centering and monitoring device for a rail flaw detector of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the horizontal detection part of the automatic centering and monitoring device of the rail flaw detector of the present invention;

[0028] Figure 3 It is a schematic diagram of the centering part structure of the automatic centering and monitoring device of the rail flaw detector of the present invention;

[0029] Figure 4 It is a schematic diagram of the outer frame structure of the automatic centering and monitoring device for the rail flaw detector of the present invention;

[0030] Figure 5 The present invention is a schematic diagram of the structure of the probe wheel adjustment part of the automatic centering and monitoring device of the rail flaw detector.

[0031] Description of reference numerals:

[0032] 1: probe wheel fixing part; 2: locking bolt; 3: horizontal support plate; 301: arc guide; 302: sliding pipe; 303: junction box; 401: angle support plate; 402: guide rail slider; 403: slider mounting plate; 404: angle adjustment frame; 405: angle drive member; 5: vertical adjustment bolt; 601: horizontal drive mounting block; 602: horizontal drive member; 603: sensor support member; 604: sensor bracket; 605: linear bearing; 606: sensor mounting frame; 607: horizontal sensor; 608: guide shaft; 7: main frame; 8: horizontal fixing frame; 801: square beam main pipe; 9: front frame; 10: guide wheel bracket; 11: optical axis; 12: horizontal guide mounting seat; 13: guide wheel; 14: guide plow; 15: preload spring. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0034] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0035] The following is a further detailed description of the automatic centering and monitoring device for rail flaw detectors proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims.

[0036] See also Figure 1 , Figure 3 and Figure 5 , an automatic centering and monitoring device for a rail flaw detector comprises: an outer frame and a level adjustment part, a level detection part and a detection wheel fixing part 1 installed on the outer frame;

[0037] The horizontal adjustment part includes a horizontal guide member fixed on the outer frame, a horizontal support member slidably connected to the horizontal guide member, and a horizontal driving member 602 for driving the horizontal support member to move horizontally along the horizontal guide member;

[0038] The level detection unit is provided with a level sensor 607 for detecting the horizontal position of the level adjustment unit.

[0039] The horizontal sensor 607 is connected to the horizontal driving member 602 by signal. The probe wheel fixing part 1 is used to fix the probe wheel of the rail flaw detector.

[0040] In response to the horizontal adjustment signal of the horizontal sensor 607, the horizontal driving member 602 drives the horizontal supporting member 602 to adjust the horizontal position, so as to drive the detection wheel fixing part 1 to be automatically aligned with the track.

[0041] Now the present embodiment is described in detail:

[0042] See also Figure 3 In this embodiment, the horizontal adjustment part is used to control the horizontal direction of the probe wheel, and the horizontal adjustment part includes: a horizontal guide member, a horizontal support member and a horizontal driving member 602; the horizontal detection part is used to detect the horizontal position of the probe wheel, and the horizontal detection part is arranged on the horizontal support member of the horizontal adjustment part, and the signal connection between the horizontal detection part and the horizontal adjustment part.

[0043] In addition, in the present embodiment, the probe wheel fixing part 1 is used to fix the ultrasonic probe wheel, and the probe wheel fixing part 1 includes: a probe wheel mounting frame and two probe wheel sub-brackets, the probe wheel mounting frame is arranged below the horizontal adjustment part, the two probe wheel sub-brackets are arranged parallel and symmetrically on both sides of the probe wheel mounting frame, the probe wheel mounting frame and the two probe wheel brackets constitute a space for arranging the ultrasonic probe wheel, in addition, a connecting rod connecting the two probe wheel brackets is provided, and the ultrasonic probe wheel is sleeved on the connecting rod; the probe wheel mounting frame of the probe wheel fixing part 1 is fixed to the lower end face of the angle support member through a dovetail groove, and is locked by a locking bolt 2; with the help of the forward power of the flaw detection trolley, the probe wheel performs flaw detection operations.

[0044] In addition, the above-mentioned wheel fixing part 1 and the horizontal adjustment part are both arranged on the outer frame, and the outer frame plays a role of fixing and connecting; preferably, a junction box 303 is also installed on the horizontal support member to play a role of protecting and connecting the wires. Preferably, both ends of the flaw detection trolley can be equipped with this embodiment, so that the flaw detection trolley can simultaneously detect two rails on the same track during its forward movement.

[0045] See also Figure 3 and Figure 4 Specifically, the horizontal guide member is an optical axis 11, which is fixed to both sides of the outer frame along the moving direction of the horizontal support member; the horizontal support member is a horizontal support plate 3, and both sides of the horizontal support plate 3 are provided with sliding pipes 302 sleeved on the optical axis 11 and slidably connected to the optical axis 11. The horizontal driving member 602 is an electric push rod, a hydraulic push rod, or a pneumatic push rod, which is fixed to the outer frame and drivingly connected to the horizontal support member, and pushes the horizontal support member to move horizontally with the outer frame as support.

[0046] See also Figure 3 and Figure 4 In this embodiment, the horizontal guide members are two parallel optical axes 11, which are fixedly connected to the outer frame, and the direction in which the optical axes 11 are set is perpendicular to the forward direction of this embodiment. The horizontal support member is a horizontal support plate 3, and two symmetrical sets of sliding pipes 302 are provided on both sides of the horizontal support plate 3 close to the optical axis 11. Linear bearings and hole retaining rings are installed in the sliding pipes 302. The optical axis 11 passes through the linear bearings, so that the horizontal support plate 3 is sleeved on the optical axis 11 and slidably connected;

[0047] The upper end surface of the horizontal support plate 3 is provided with a horizontal driving member 602 and a horizontal driving mounting block 601 for installing the horizontal driving member 602. The horizontal driving member 602 can be an electric push rod, a hydraulic push rod or a pneumatic push rod; one end of the horizontal driving member 602 is a fixed end, which is connected to the outer frame, and the other end is a driving end, which is drivingly connected to the horizontal support plate 3; when the horizontal sensor 607 of this embodiment finds that the probe wheel is offset in the horizontal direction during the detection process, the horizontal driving member 602 pushes the horizontal support plate 3 with the outer frame as a support member, thereby driving the probe wheel to move in the horizontal direction, so that the horizontal relative position of the probe wheel and the track remains unchanged, so that the probe wheel and the track are better coupled.

[0048] See also Figure 1 and Figure 2 , wherein the horizontal detection part includes a sensor support 603 fixed to the horizontal support, a sensor bracket 604 detachably connected to the sensor support 603, and a sensor mounting member for mounting a horizontal sensor 607. Specifically, one end of the sensor bracket 604 is detachably connected to one end of the sensor support 603 along the traveling direction of the rail flaw detector, the connection between the sensor bracket 604 and the sensor support 603 is located in the middle of the end surface of the sensor support 603, and the other end of the sensor bracket 604 is fixedly connected to the sensor mounting member. Specifically, the sensor mounting member includes a bottom plate, side plates connected to the bottom plate and arranged parallel to each other, a guide shaft 608 is provided between the side plates, a horizontal sensor 607 and a linear bearing 605 are sleeved on the guide shaft 608, the horizontal sensor 607 includes a first horizontal sensor and a second horizontal sensor, and the linear bearing 605 is used to adjust the distance between the first horizontal sensor and the second horizontal sensor.

[0049] See also Figure 1 and Figure 2In this embodiment, the sensor support 603 is connected to the horizontal support plate 3, and the sensor support 603 moves horizontally synchronously with the horizontal support plate 3. One end of the sensor bracket 604 is connected to the sensor support 603 by a locking bolt 2, and the connection point is the end face center of the sensor support 603, and the other end of the sensor bracket 604 is connected to the sensor mounting member. Among them, the sensor mounting member is a U-shaped structure, and its opening faces the track. The two side plates of the sensor mounting member are arranged in parallel. Two guide shafts 608 are arranged between the two side plates. The guide shaft 608 is sleeved with a linear bearing 605 and a sensor mounting frame 606. The sensor mounting frame 606 has one for fixing the first horizontal sensor, and the second horizontal sensor is connected to the bottom plate of the sensor mounting member. Among them, the horizontal sensor 607 is a laser sensor. Due to the different types of rails (rail head width), the distance between the sensor mounting frame 606 and the second horizontal sensor is adjusted by the linear bearing 605 so that the distance interval is equal to the rail head width. After the adjustment is completed, the sensor mounting frame 606 is bolted to the two side walls by the locking bolt 2. Of course, the second level sensor can also be fixed by the sensor mounting bracket.

[0050] The horizontal adjustment of the probe wheel in this embodiment is now explained: of the two laser sensors in this embodiment, when one of the laser sensors detects the track and the other laser sensor does not detect the track, it is determined that the probe wheel is in a deviated state. The horizontal sensor 607 sends an electrical signal to the detection software to alarm, and sends an adjustment signal to the horizontal drive 602. After receiving the signal, the horizontal drive 602 pushes the horizontal support plate 3 to move to the side where the rail is detected. During the displacement process, when the two laser sensors just fail to detect the rail, it means that the probe wheel has been aligned with the geometric center of the rail cross section, thereby realizing automatic resetting of the probe wheel in the horizontal direction. At that time, this embodiment can also adjust the horizontal position of the probe wheel by manually controlling the horizontal drive 602 before operation.

[0051] See also Figure 3 and Figure 5 Preferably, it also includes an angle adjustment part, which includes an arc-shaped guide member 301 fixed on a horizontal support member, an angle support member slidably connected to the arc-shaped guide member 301, and an angle driving member 405 for driving the angle support member to adjust the angle along the arc-shaped guide member 301, wherein the angle support member is connected to the probe wheel fixing part 1, wherein the center of the guide arc of the arc-shaped guide member 301 is located at the center position of the probe wheel fixing part 1 fixing the probe wheel.

[0052] Specifically, the arc-shaped guide member 301 is an arc-shaped guide rail or an arc-shaped guide groove, and the arc-shaped guide member 301 is fixed to both sides of the horizontal support member along the angle adjustment direction of the angle support member; the angle support member is an angle support plate 401, and both sides of the angle support plate 401 are provided with sliders or pulleys slidably connected to the arc-shaped guide member 301; the end surface of the angle support plate 401 away from the horizontal support plate 3 is connected to the probe wheel fixing part 1. Among them, the angle driving member 405 is an electric push rod or a hydraulic push rod or a pneumatic push rod, and an angle adjustment frame 404 is provided at one end of the horizontal support member where the arc-shaped guide member 301 is not provided, and the angle driving member 405 is fixed on the angle adjustment frame 404 and is drivingly connected to the angle support member, and the angle adjustment frame 404 is used as a support to promote the angle adjustment of the angle support member.

[0053] See also Figure 3 and Figure 5 In this embodiment, the arc-shaped guide member 301 is an arc-shaped guide rail or an arc-shaped guide groove. The arc-shaped guide member 301 is fixed to both sides of the horizontal support member along the angle adjustment direction of the angle support member, and is located below the sliding pipe 302 of the horizontal support member. Specifically, the center of the arc-shaped guide member 301 is located at the center position of the fixed probe wheel of the probe wheel fixing part 1;

[0054] The angle support member is an angle support plate 401, which is arranged between the horizontal support plate 3 and the probe wheel fixing part 1, and the lower end surface of the angle support plate 401 is connected to the probe wheel mounting frame of the probe wheel fixing part 1; guide rail sliders 402 or pulleys are installed at both ends of the angle support plate 401 close to the arc-shaped guide member 301, and the guide rail sliders 402 or pulleys are fixed to the angle support plate 401 through the slider mounting plate 403, and can also be directly connected to the angle support plate 401, and the angle support plate 401 is slidably connected to the arc-shaped guide member 301 of the horizontal support member through the guide rail sliders 402 or pulleys;

[0055] See also Figure 5, the end of the horizontal support plate 3 not equipped with the sliding track is equipped with an angle adjustment frame 404, and at the same time, the angle driving member 405 is installed on the angle adjustment frame 404; the angle driving member 405 can be an electric push rod or a hydraulic push rod or a pneumatic push rod, and one end of the angle driving member 405 is a fixed end, which is fixedly connected to the angle adjustment frame 404; the other end of the angle driving member 405 is a driving end, which is drivingly connected to the angle support plate 401 to push the angle support plate 401; when this embodiment is found before flaw detection There is an offset between the forward angle of the probe wheel and the guide rail, and the angle driving member 405 can be manually controlled to push the angle support plate 401 with the angle adjustment frame 404 as the support, thereby driving the guide rail slider 402 or the pulley of the angle support member to slide on the arc guide member 301. Since the probe wheel fixing part 1 is connected to the angle support plate 401, when the angle support plate 401 slides, it drives the probe wheel fixing part 1 to change the angle between the probe wheel and the guide rail, thereby changing the forward direction of the probe wheel, so that the probe wheel and the guide rail remain coupled.

[0056] See also Figure 3 and Figure 5 Preferably, it also includes a vertical adjustment bolt 5, and the angle support plate 401 is connected to the probe wheel fixing part 1 via the vertical adjustment bolt 5, and the vertical adjustment bolt 5 is used to adjust the vertical displacement of the probe wheel fixing part 1 and the angle support plate 401.

[0057] In this embodiment, the angle support plate 401 is connected to the detection wheel mounting frame of the detection wheel fixing part 1 via the vertical adjustment bolt 5, and the vertical adjustment rod is connected to the vertical adjustment bolt 5 via the opening of the horizontal support plate 3. When the flaw detection trolley stops working, the vertical adjustment rod is used to raise the detection wheel fixing part 1, thereby driving the detection wheel to rise; when the flaw detection trolley starts working, the vertical adjustment rod is used to lower the detection wheel fixing part 1, thereby driving the detection wheel to lower and couple with the track.

[0058] See also Figure 4 The outer frame includes: a main frame 7, a horizontal fixed frame 8, a front frame 9, a square beam main pipe 801 and a guide wheel bracket 10; the main frame 7 is connected to the front frame 9, and the main frame 7 is connected to the horizontal fixed frame 8 via the square beam main pipe 801; the guide wheel bracket 10 is connected to the front frame 9, and the guide wheel bracket 10 is connected to the main frame 7 via the square beam main pipe 801; the horizontal adjustment part, the angle adjustment part and the probe wheel fixing part 1 are all arranged in the space formed by the main frame 7, the horizontal fixed frame 8 and the front frame 9; the horizontal guide member is connected to the front frame 9, the horizontal fixed frame 8 and the main frame 7 in sequence.

[0059] In this embodiment, the outer frame is mainly composed of a main frame 7, a horizontal fixing frame 8, and a front frame 9. The main frame 7 bears the main connection components of this embodiment, and is respectively connected to the front frame 9, connected to the horizontal fixing frame 8 via the square beam main pipe 801, and connected to the guide wheel bracket 10 via the square beam main pipe 801. In addition, it is connected and locked with the split frame of the flaw detection trolley through two adjustable positioning handles; the front frame 9 is mainly used to connect with one end of the horizontal guide member, and the other end of the horizontal guide member is connected to the horizontal guide mounting seat 12 of the main frame 7 via the horizontal fixing frame 8;

[0060] A linear bearing is provided on the horizontal fixing frame 8, and a horizontal guide passes through the linear bearing of the horizontal fixing frame 8 to fix the optical axis 11;

[0061] The guide wheel bracket 10 is installed between the front frame 9 and the square beam main pipe 801 , and the guide wheel bracket 10 is used to install the guide wheel 13 and the guide plow 14 .

[0062] See also Figure 3 and Figure 4 Specifically, the outer frame is located at both sides of the detection wheel fixing part 1 along the track direction and is provided with guide wheels 13 and guide plows 14; the guide wheels 13 are used to make the flaw detection trolley close to the guide rail; the guide plows 14 are used to prevent the flaw detection trolley from derailing or falling off the track when passing through the harmful space of the switch.

[0063] In this embodiment, similar to the probe wheel fixed to the probe wheel fixing part 1, the guide wheel 13 and the guide plow 14 are installed adjacent to each other on the guide wheel bracket 10; in this embodiment, there are two groups of guide wheels 13 and guide plows 14, which are respectively located in front and behind the probe wheel fixing part 1; the guide wheel 13 helps the probe wheel to run on the center line of the guide rail; the guide plow 14 will move laterally along the track with the flaw detection trolley, play a blocking role, and prevent derailment, falling off the track, etc.

[0064] See also Figure 3 and Figure 4 Preferably, the outer frame also includes an elastic member, one end of the elastic member is connected to the square beam main pipe 801, and the other end of the elastic member is connected to the main frame 7.

[0065] In this embodiment, the elastic member is a pre-tensioning spring 15. Since the pre-tensioning spring 15 is arranged adjacent to the square beam main pipe 801, and the square beam main pipe 801 is respectively connected to the guide wheel bracket 10 and the horizontal fixing frame 8, the pre-tensioning spring 15 will make the wheel rim of the guide wheel 13 have elastic force against the side of the guide rail. In addition, it will also provide elastic pressure to the horizontal fixing frame 8; therefore, the pre-tensioning spring 15 will minimize the inclination of the guide wheel 13 caused by the serpentine operation of the flaw detection vehicle or passing through the curved track, so that the detection wheel can reduce the horizontal displacement relative to the guide rail as much as possible, which is convenient for the self-adjustment of this embodiment to obtain more accurate test data.

[0066] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. An automatic centering and monitoring device for a rail flaw detector, characterized in that: include: An outer frame and a level adjustment part, a level detection part and a probe wheel fixing part installed on the outer frame; The horizontal adjustment part includes a horizontal guide member fixed on the outer frame, a horizontal support member slidably connected to the horizontal guide member, and a horizontal driving member for driving the horizontal support member to horizontally move along the horizontal guide member; The horizontal detection part is provided with a horizontal sensor for detecting the horizontal position of the horizontal adjustment part, the horizontal sensor is connected to the horizontal driving member by signal, the wheel detection fixing part is used to fix the wheel detection of the rail flaw detector, wherein, in response to the horizontal adjustment signal of the horizontal sensor, the horizontal driving member drives the horizontal support member to adjust the horizontal position, so as to drive the wheel detection fixing part to be automatically aligned with the rail; The level detection unit includes a sensor support member fixed to the level support member, a sensor bracket detachably connected to the sensor support member, and a sensor mounting member for mounting the level sensor; The sensor mounting member comprises a bottom plate, and side plates connected to the bottom plate and arranged parallel to each other, a guide shaft is arranged between the side plates, the guide shaft is sleeved with the level sensor and a linear bearing, the level sensor comprises a first level sensor and a second level sensor, and the linear bearing is used to adjust the distance between the first level sensor and the second level sensor; The first level sensor and the second level sensor are laser sensors. When the two laser sensors fail to detect the rail, the detection wheel is aligned with the geometric center of the cross section of the rail.

2. The automatic centering and monitoring device for rail flaw detector according to claim 1 is characterized in that: The horizontal guide member is an optical axis, and the optical axis is fixed to both sides of the outer frame along the moving direction of the horizontal support member; The horizontal support member is a horizontal support plate, and sliding pipes are provided on both sides of the horizontal support plate and are sleeved on the optical axis and slidably connected to the optical axis.

3. The automatic centering and monitoring device for rail flaw detector according to claim 2 is characterized in that: The horizontal driving member is an electric push rod, a hydraulic push rod or a pneumatic push rod. The horizontal driving member is fixed on the outer frame and is drivingly connected to the horizontal support member, and the horizontal support member is pushed to move horizontally with the outer frame as support.

4. The automatic centering and monitoring device for rail flaw detector according to claim 1 is characterized in that: One end of the sensor bracket is detachably connected to one end of the sensor support along the travel direction of the rail flaw detector, the connection between the sensor bracket and the sensor support is located in the middle of the end surface of the sensor support, and the other end of the sensor bracket is fixedly connected to the sensor mounting member.

5. The automatic centering and monitoring device for rail flaw detector according to claim 1 is characterized in that: It also includes an angle adjustment part, which includes an arc-shaped guide member fixed on the horizontal support member, an angle support member slidably connected to the arc-shaped guide member, and an angle driving member for driving the angle support member to adjust the angle along the arc-shaped guide member, wherein the angle support member is connected to the detection wheel fixing part, wherein the center of the guide arc of the arc-shaped guide member is located at the center position of the detection wheel fixed by the detection wheel fixing part.

6. The automatic centering and monitoring device for rail flaw detector according to claim 5, characterized in that: The arc-shaped guide member is an arc-shaped guide rail or an arc-shaped guide groove, and the arc-shaped guide member is fixed to both sides of the horizontal support member along the angle adjustment direction of the angle support member; The angle support member is an angle support plate, and sliders or pulleys slidably connected to the arc-shaped guide member are provided on both sides of the angle support plate; the end surface of the angle support plate away from the horizontal support member is connected to the detection wheel fixing part.

7. The automatic centering and monitoring device for rail flaw detector according to claim 6 is characterized in that: The angle driving member is an electric push rod, a hydraulic push rod or a pneumatic push rod. An angle adjustment frame is provided at the end of the horizontal support member where the arc-shaped guide member is not provided. The angle driving member is fixed on the angle adjustment frame and is drivingly connected to the angle support member, and the angle adjustment frame is used as a support to push the angle support member to adjust its angle.

8. The automatic centering and monitoring device for rail flaw detector according to claim 6 or 7, characterized in that: It also includes a vertical adjustment bolt, and the angle support plate is connected to the probe wheel fixing part via the vertical adjustment bolt, and the vertical adjustment bolt is used to adjust the vertical displacement of the probe wheel fixing part and the angle support plate.

9. The automatic centering and monitoring device for rail flaw detector according to claim 1, characterized in that: The outer frame is provided with guide wheels and guide plows on both sides of the probe wheel fixing part along the track direction; The guide wheel is used to make the flaw detection trolley close to the guide rail; The guide plow is used to prevent the flaw detection trolley from derailing or falling off the track when passing through the harmful space of the turnout.

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