Railway T-bridge concrete crack intelligent automatic detection device

Abstract

The invention belongs to the technical field of concrete crack automatic detection, and discloses a railway T bridge concrete crack intelligent automatic detection device which comprises a moving mechanism arranged at the top end of a T bridge, and a detection mechanism is arranged on the moving mechanism; the detection mechanism comprises an adjusting assembly, and a detection assembly is arranged on the adjusting assembly; the adjusting assembly comprises a fixed arm, a telescopic module is movably arranged at the end of the fixed arm, a detection platform is arranged on the telescopic module, and the detection assembly is fixedly installed on the detection platform. The device is simple in structure and convenient to use, automatic front-back walking of the device is achieved through the moving mechanism, the detection position can be flexibly adjusted during moving, detection is conducted at a preset place according to bridge detection requirements, the applicability and safety of the device are improved, non-contact intelligent detection of concrete cracks, concrete carbonization and steel bar corrosion conditions is achieved, and the device is suitable for popularization and application. The detection efficiency is high, the detection comprehensiveness is high, the influence of the external environment on the detection precision is reduced, and the personnel risk in the detection process is also reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of automatic detection of concrete cracks, and in particular relates to an intelligent automatic detection device for concrete cracks on a railway T-bridge. Background Art

[0002] In the field of railway bridge maintenance, especially for the widely used T-type bridge (T bridge for short), the concrete structure inspection is carried out to timely discover the risks of T bridge and improve the safety of railway bridges.

[0003] At present, traditional bridge inspection mainly relies on manual inspection, simple sensor equipment, and intelligent data collection by drones, which has many limitations; manual inspection is inefficient, the detection range is limited, and it is also affected by the weather. In addition, a large amount of equipment debugging is required before departure, and personal safety hazards need to be considered due to manual reasons; the layout of traditional inspection equipment is unreasonable, the coverage range is narrow, and it is impossible to fully understand the health status of the entire bridge. In addition, data processing and analysis rely more on subjective experience, and it is not possible to effectively classify and analyze the damaged parts and provide solutions; although drone intelligent detection technology is convenient, it is limited by algorithms and the surrounding environment in some bridge environments, and it is impossible to actively avoid obstacles, and there may be problems such as GPS failure and air traffic control. Therefore, traditional detection methods have limitations and inspection blind spots, the detection range is not comprehensive and detailed, the operation efficiency is low, the cost is high, the difficulty is high, the detection personnel have personal safety hazards, and the implementation of technology is problematic.

[0004] Therefore, the present application designs an intelligent automatic detection device for concrete cracks in a railway T-bridge to solve the above-mentioned technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes an intelligent automatic detection device for concrete cracks in a railway T-bridge.

[0006] To achieve the above-mentioned object, the present invention provides an intelligent automatic detection device for concrete cracks of a railway T-bridge, comprising a mobile mechanism arranged at the top of the T-bridge, wherein a detection mechanism for detecting the T-bridge is movably arranged on the mobile mechanism;

[0007] The detection mechanism comprises an adjustment component arranged on the moving mechanism, the adjustment component is provided with a detection component for detection, and the adjustment component drives the detection component to detect the concrete of the T bridge;

[0008] The adjustment component comprises a fixed arm mounted on the moving mechanism, the end of the fixed arm is movably provided with a telescopic module that can be extended and rotated, a position-adjustable detection platform is arranged on the telescopic module, and the detection component is fixedly mounted on the detection platform.

[0009] In the intelligent automatic detection device for concrete cracks on a railway T-bridge disclosed in the present application, the telescopic module includes a first telescopic arm, a second telescopic arm and a third telescopic arm which are connected to the fixed arm by movable rods in sequence at the head and tail ends, and the detection platform is movably arranged on the first telescopic arm, the second telescopic arm and the third telescopic arm respectively.

[0010] In the intelligent automatic detection device for concrete cracks on a railway T-bridge disclosed in the present application, a first rotator is provided between the fixed arm and the telescopic arm, and the first rotator controls the first telescopic arm to rotate at the end of the fixed arm.

[0011] In the intelligent automatic detection device for concrete cracks on a railway T-bridge disclosed in the present application, a second rotator is arranged between one end of the first telescopic arm away from the fixed arm and the second telescopic arm, and the second rotator controls the second telescopic arm to rotate on the first telescopic arm.

[0012] In the intelligent automatic detection device for concrete cracks on a railway T-bridge disclosed in the present application, a third rotator is arranged between an end of the second telescopic arm away from the first telescopic arm and the third telescopic arm, and the third rotator controls the retractable third rotatable arm to rotate on the second telescopic arm.

[0013] In the intelligent automatic detection device for concrete cracks of a railway T-bridge disclosed in the present application, the mobile mechanism includes a walking track arranged on the T-bridge, a traveling vehicle is movably arranged on the walking track, the fixed arm can be foldably mounted on the traveling vehicle, and a control module is arranged on the traveling vehicle for controlling the operation of the device.

[0014] In the intelligent automatic detection device for concrete cracks in a railway T-bridge disclosed in the present application, the detection component includes an ultrasonic detector, a digital camera and a laser scanner. The ultrasonic detector, the digital camera and the laser scanner are respectively arranged on a detection platform to perform different detections on different positions of the T-bridge.

[0015] In the intelligent automatic detection device for concrete cracks of a railway T-bridge disclosed in the present application, a fixed receiving groove adapted to the first telescopic arm is provided on the fixed arm, and the first telescopic arm can be folded into the fixed receiving groove.

[0016] In the intelligent automatic detection device for concrete cracks of a railway T-bridge disclosed in the present application, a first receiving groove adapted to the second telescopic arm is provided on the first telescopic arm, and the second telescopic arm can be folded and retracted into the first receiving groove.

[0017] In the intelligent automatic detection device for concrete cracks of a railway T-bridge disclosed in the present application, a second receiving groove corresponding to the third telescopic arm is provided on the second telescopic arm, and the third telescopic arm can be folded and retracted into the second receiving groove.

[0018] Compared with the prior art, the present invention has the following advantages and technical effects: the present invention discloses an intelligent automatic detection device for concrete cracks of a railway T-bridge, which is used to automatically detect the concrete structure of the T-bridge, and is flexible and convenient; when performing detection, a mobile mechanism is temporarily installed on the bridge flange of the T-bridge, thereby driving the detection mechanism used for detection to move, and at the same time the detection mechanism can be flexibly adjusted, and detection can be performed through a variety of detection methods, which is convenient for blind-angle detection of each section of the T-bridge, with high efficiency, little external influence, and reduced danger to staff; an adjusting component is installed on the mobile mechanism, thereby driving the adjusting component to move on the T-bridge, and the adjusting component itself has adjustability, and can flexibly adjust the position of the detection component thereon, thereby covering the detection position of the T-bridge and reducing detection blind angles; a fixed arm is installed on the mobile mechanism, so that the fixed arm can translate with the mobile mechanism, and the telescopic module can realize operations such as telescoping, rotation and deflection, thereby more flexibly controlling the position of the detection component on the detection platform.

[0019] The present invention has a simple structure and is easy to use. The mobile mechanism enables the equipment to move forward and backward automatically, and the detection position can be flexibly adjusted during movement. Detection is performed at a predetermined location according to bridge detection requirements, thereby improving the applicability and safety of the equipment and realizing non-contact intelligent detection of concrete cracks, concrete carbonization, and steel bar corrosion. The detection efficiency is high, the detection comprehensiveness is high, the influence of the external environment on the detection accuracy is reduced, and the risk of personnel in the detection process is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the installation of the intelligent automatic detection device for concrete cracks on a railway T-bridge of the present invention;

[0022] Figure 2 This is an axial view of the intelligent automatic detection device for concrete cracks on a railway T-bridge of the present invention;

[0023] Figure 3 It is a schematic diagram of the intelligent automatic detection device for concrete cracks on a railway T-bridge of the present invention spanning a transverse diaphragm;

[0024] In the figure: 1. T-bridge; 2. Walking track; 3. Walking vehicle; 4. Fixed arm; 5. First telescopic arm; 6. Second telescopic arm; 7. Third telescopic arm; 8. Detection platform; 9. First rotator; 10. Second rotator; 11. Third rotator; 12. Ultrasonic detector; 13. Digital camera; 14. Laser scanner; 15. Fixed storage slot; 16. First storage slot; 17. Second storage slot; 18. Control module; 19. Power module; 20. Mobile module; 21. Pier; 22. Diaphragm. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figure 1-Figure 3 As shown, this embodiment provides an intelligent automatic detection device for concrete cracks on a railway T-bridge, comprising a mobile mechanism arranged at the top of the T-bridge 1, and a detection mechanism for detecting the T-bridge 1 is movably arranged on the mobile mechanism;

[0028] The detection mechanism includes an adjustment component arranged on the moving mechanism, and a detection component for detection is arranged on the adjustment component, and the adjustment component drives the detection component to detect the concrete of the T bridge 1;

[0029] The adjustment component comprises a fixed arm 4 mounted on the moving mechanism, the end of the fixed arm 4 is movably provided with a telescopic module which can be extended and rotated, a position-adjustable detection platform is arranged on the telescopic module, and the detection component is fixedly mounted on the detection platform.

[0030] The invention discloses an intelligent automatic detection device for concrete cracks of a railway T-bridge 1, which is used for automatically detecting the concrete structure of the T-bridge 1, and is flexible and convenient. When detecting, a mobile mechanism is temporarily installed on the bridge flange of the T-bridge 1, so as to drive the detection mechanism used for detection to move, and at the same time, the detection mechanism can be flexibly adjusted, and detection is performed through a variety of detection methods, so as to facilitate the detection of each section of the T-bridge 1 without dead angles, with high efficiency, little external influence, and reduced danger to workers. An adjustment component is installed on the mobile mechanism, so as to drive the adjustment component to move on the T-bridge 1, and the adjustment component itself has adjustability, and can flexibly adjust the position of the detection component thereon, so as to cover the detection position of the T-bridge 1 and reduce the detection dead angle. A fixed arm 4 is installed on the mobile mechanism, so that the fixed arm 4 can translate with the mobile mechanism, and a telescopic module can realize operations such as telescoping, rotation and deflection, so as to more flexibly control the position of the detection component on the detection platform. The present invention has a simple structure and is easy to use. The mobile mechanism enables the equipment to move forward and backward automatically, and the detection position can be flexibly adjusted during movement. Detection is performed at a predetermined location according to bridge detection requirements, thereby improving the applicability and safety of the equipment and realizing non-contact intelligent detection of concrete cracks, concrete carbonization, and steel bar corrosion. The detection efficiency is high, the detection comprehensiveness is high, the influence of the external environment on the detection accuracy is reduced, and the risk of personnel in the detection process is also reduced.

[0031] In one embodiment of the intelligent automatic detection device for concrete cracks of a railway T-bridge of the present application, the telescopic module includes a first telescopic arm 5, a second telescopic arm 6 and a third telescopic arm 7 which are connected to the fixed arm 4 by movable rods in sequence end to end, and the detection platform is movably arranged on the first telescopic arm 5, the second telescopic arm 6 and the third telescopic arm 7. The first telescopic arm 5, the second telescopic arm 6 and the third telescopic arm 7 of the present application are connected end to end in sequence, and the first telescopic arm 5, the second telescopic arm 6 and the third telescopic arm 7 have telescopic functions themselves, and can rotate 360° at the connection position, thereby realizing flexible adjustment of multiple angles, and a detection platform is installed on the first telescopic arm 5, the second telescopic arm 6 and the third telescopic arm 7 respectively, so that the detection components on the detection platform can cover various positions of the T-bridge 1.

[0032] In another embodiment of the present application, the telescopic module is not limited to the first telescopic arm 5, the second telescopic arm 6 and the third telescopic arm 7. The number can be flexibly adjusted according to the detection requirements to improve the detection efficiency.

[0033] In one embodiment of the intelligent automatic detection device for concrete cracks of a railway T-bridge of the present application, a first rotator 9 is provided between the fixed arm 4 and the telescopic arm, and the first rotator 9 controls the first telescopic arm 5 to rotate at the end of the fixed arm 4. The first rotator 9 is provided between the first telescopic arm 5 and the fixed arm 4, and its output end is transmission-connected with the first telescopic arm 5, so that the first telescopic rod can achieve 360° rotation.

[0034] In one embodiment of the intelligent automatic detection device for concrete cracks of a railway T-bridge of the present application, a second rotator 10 is arranged between the end of the first telescopic arm 5 away from the fixed arm 4 and the second telescopic arm 6, and the second rotator 10 controls the second telescopic arm 6 to rotate on the first telescopic arm 5. The second rotator 10 is arranged between the first telescopic arm 5 and the second telescopic arm 6, and its output end is transmission-connected with the second telescopic arm 6, so that the second telescopic rod can achieve 360° rotation.

[0035] In one embodiment of the intelligent automatic detection device for concrete cracks of a railway T-bridge of the present application, a third rotator 11 is provided between one end of the second telescopic arm 6 away from the first telescopic arm 5 and the third telescopic arm 7, and the third rotator 11 controls the retractable third rotating arm to rotate on the second telescopic arm 6. The third rotator 11 is provided between the second telescopic arm 6 and the third telescopic arm 7, and its output end is transmission-connected with the third telescopic arm 7, so that the third telescopic rod can achieve 360° rotation.

[0036] In one embodiment of the present application, a moving module 20 is respectively provided on the first telescopic arm 5 , the second telescopic arm 6 and the third telescopic arm 7 , and the moving module 20 is used to control the movement of the detection platform, thereby improving the flexibility of adjustment.

[0037] In one embodiment of the present application, the first rotator 9, the second rotator 10, the third rotator 11 and the moving module 20 can all be controlled by remote control, which is convenient for operators to remotely control the operation in a safe location.

[0038] In one embodiment of the intelligent automatic detection device for concrete cracks of railway T-bridge of the present application, the mobile mechanism includes a walking track 2 arranged on the T-bridge 1, a traveling vehicle 3 is movably arranged on the walking track 2, a fixed arm 4 is foldably mounted on the traveling vehicle 3, and a control module is arranged on the traveling vehicle 3 for controlling the operation of the device. The walking track 2 is composed of two pieces of tracks, fixed on the lower side of the bridge flange, as the moving position of the traveling vehicle 3; the end of the fixed arm 4 is rotated on the traveling vehicle 3, and the fixed arm 4 can be controlled to rotate on the traveling vehicle 3, and its angle can be flexibly adjusted; the control module 18 is also installed on the traveling vehicle 3, which can be used as the control center of the present application, and can control the flipping of the fixed arm 4, control the movement of the first telescopic arm 5, the second telescopic arm 6 and the third telescopic arm 7, control the movement of the detection platform driven by the mobile module 20 and the operation of the detection component, detect the concrete on the T-bridge 1, and transmit the detection results to the control personnel.

[0039] In one embodiment of the present application, a power module 19 is provided on the traveling vehicle 3 so that the traveling vehicle 3 can move on the traveling track 2; the power module 19 is electrically connected to the control module 18, and can control the movement and stop of the traveling vehicle 3, and thus can detect the designated position.

[0040] In one embodiment of the intelligent automatic detection device for concrete cracks of a railway T-bridge of the present application, the detection components include an ultrasonic detector 12, a digital camera 13 and a laser scanner 14, which are respectively arranged on the detection platform to perform different detections on different positions of the T-bridge 1. The detection platform is equipped with an ultrasonic detector 12, a high-resolution digital camera 13 and a laser scanner 14. The ultrasonic detector 12 can detect the cracks of the concrete, the digital camera 13 can take clear pictures of the carbonization of the concrete, and the laser scanner 14 can detect the rust of the steel bars, so as to comprehensively detect the state of the concrete of the T-bridge 1 and transmit the detected concrete loading to the control personnel.

[0041] In one embodiment of the present application, the ultrasonic detector 12, the digital camera 13 and the laser scanner 14 are all fixed on the detection platform by mounting bolts.

[0042] In one embodiment of the present application, the control module 18 includes a PLC with a programming function, which serves as the control core of the device. The control module 18 also has information processing function, data transmission function and remote control function. The PLC controls the mobile vehicle to move to the designated position, and then controls the mobile platform to the designated position, and controls the ultrasonic detector 12, the digital camera 13 and the laser scanner 14 to start obtaining concrete information, and then processes the obtained concrete information, and transmits the data wirelessly to the intelligent gateway through the data transmission function. The intelligent gateway transmits the data to the cloud platform through the 4G / 5G signal. By retrieving data on the cloud platform for analysis, the damage to the bridge cracks, the degree of concrete carbonization and the steel bar corrosion can be determined; and the remote control function can receive the control information of the operator to realize remote control of the equipment operation.

[0043] In one embodiment of the intelligent automatic detection device for concrete cracks of a railway T-bridge of the present application, a fixed receiving slot 15 adapted to the first telescopic arm 5 is provided on the fixed arm 4, and the first telescopic arm 5 can be folded into the fixed receiving slot 15. The fixed receiving slot 15 is provided on the fixed arm 4, and the first telescopic arm 5 can be retracted back into the fixed receiving slot 15 under the drive of the first rotator 9, which is convenient for storage, reduces the occupied space, and also avoids damage during transportation, thereby improving the safety of the equipment.

[0044] In one embodiment of the intelligent automatic detection device for concrete cracks of a railway T-bridge of the present application, the first telescopic arm 5 is provided with a first receiving groove 16 adapted to the second telescopic arm 6, and the second telescopic arm 6 can be folded and retracted into the first receiving groove 16. The first telescopic arm 5 is provided with the first receiving groove 16, and the second telescopic arm 6 can be retracted back into the first receiving groove 16 under the drive of the second rotator 10, so as to facilitate storage, reduce occupied space, avoid damage during transportation, and improve the safety of the equipment.

[0045] In one embodiment of the intelligent automatic detection device for concrete cracks of a railway T-bridge of the present application, a second storage slot 17 corresponding to the third telescopic arm 7 is provided on the second telescopic arm 6, and the third telescopic arm 7 can be folded and retracted into the second storage slot 17. The second telescopic arm 6 is provided with a second storage slot 17, and the third telescopic arm 7 can be retracted back into the second storage slot 17 under the drive of the third rotator 11, which is convenient for storage, reduces the occupied space, and avoids damage during transportation, thereby improving the safety of the equipment.

[0046] In one embodiment of the present application, the detection platform 8 on the third telescopic arm 7 can not only be leveled along the third telescopic arm 7, but also be able to rotate 360° around the third telescopic arm 7, so that the ultrasonic detector 12, digital camera 13 and laser scanner 14 on the detection platform 8 can be aimed at different directions, thereby reducing blind spots in the detection of the T-bridge 1.

[0047] In one embodiment of the present application, the third telescopic arm 7 can rotate 360° in the up and down direction with the end of the second telescopic arm 6 as the center, and the cracks on the diaphragm on the T-bridge 1 can be detected by moving the detection platform 8 on the third telescopic arm 7.

[0048] In one embodiment of the present application, the detection platforms 8 on the first telescopic arm 5 and the second telescopic arm 6 are both facing one side of the T-bridge 1, which facilitates the detection of the T-bridge 1 and avoids the first telescopic arm 5 and the second telescopic arm 6 affecting the detection viewing angle.

[0049] In one embodiment of the present application, when the device is moving along the walking track 2, if it encounters the transverse partition 22, the third telescopic arm 7 is first retracted to its original length and then folded into the second storage groove 17. The device then moves forward and can cross the transverse partition 22.

[0050] In one embodiment of the present application, if cracks on the partition 22 are to be detected, the device moves to a predetermined position between the two partitions 22, and at the same time rotates the third telescopic arm 7 from the second receiving groove 17 to a vertical position, and then extends the third telescopic arm 7 to a predetermined position, and then the detection platform 8 on the third telescopic arm 7 moves up and down on the third telescopic arm 7. At the same time, the detection platform 8 can also be rotated 360° with the third telescopic arm 7 as the axis to complete the detection of the partition 22 and the detection of blind spots.

[0051] In one embodiment of the present application, if the device encounters a bridge pier 21 during its movement, the third telescopic arm 7 is first folded into the second storage groove 17, and then the second telescopic arm 6 is horizontally rotated to a suitable position toward the outside of the bridge, and then the first telescopic arm 5 is retracted, so that the device can move forward and cross obstacles such as the bridge pier 21.

[0052] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An intelligent automatic detection device for concrete cracks in a railway T-bridge, characterized by: It comprises a moving mechanism arranged at the top of the T-bridge (1), and a detection mechanism used for detecting the T-bridge (1) is movably arranged on the moving mechanism; The detection mechanism comprises an adjustment component arranged on the moving mechanism, the adjustment component is provided with a detection component for detection, and the adjustment component drives the detection component to detect the concrete of the T-bridge (1); The adjustment component comprises a fixed arm (4) mounted on the moving mechanism, the end of the fixed arm (4) being movably provided with a telescopic module which can be extended and rotated, a position-adjustable detection platform being provided on the telescopic module, and the detection component being fixedly mounted on the detection platform.

2. The intelligent automatic detection device for concrete cracks of a railway T-bridge according to claim 1 is characterized in that: The telescopic module comprises a first telescopic arm (5), a second telescopic arm (6) and a third telescopic arm (7) which are movably connected to the fixed arm (4) end by end, and the detection platform is movably arranged on the first telescopic arm (5), the second telescopic arm (6) and the third telescopic arm (7).

3. The intelligent automatic detection device for concrete cracks of a railway T-bridge according to claim 2 is characterized by: A first rotator (9) is provided between the fixed arm (4) and the telescopic arm, and the first rotator (9) controls the first telescopic arm (5) to rotate at the end of the fixed arm (4).

4. The intelligent automatic detection device for concrete cracks of a railway T-bridge according to claim 2 is characterized by: A second rotator (10) is provided between one end of the first telescopic arm (5) away from the fixed arm (4) and the second telescopic arm (6), and the second rotator (10) controls the second telescopic arm (6) to rotate on the first telescopic arm (5).

5. The intelligent automatic detection device for concrete cracks of a railway T-bridge according to claim 2 is characterized in that: A third rotator (11) is provided between one end of the second telescopic arm (6) away from the first telescopic arm (5) and the third telescopic arm (7), and the third rotator (11) controls the retractable third rotating arm to rotate on the second telescopic arm (6).

6. The intelligent automatic detection device for concrete cracks of a railway T-bridge according to claim 1 is characterized by: The mobile mechanism comprises a walking track (2) arranged on the T bridge (1), a walking vehicle (3) is movably arranged on the walking track (2), the fixed arm (4) is foldably mounted on the walking vehicle (3), and a control module is arranged on the walking vehicle (3) for controlling the operation of the device.

7. The intelligent automatic detection device for concrete cracks in a railway T-bridge according to claim 1 is characterized by: The detection component comprises an ultrasonic detector (12), a digital camera (13) and a laser scanner (14); the ultrasonic detector (12), the digital camera (13) and the laser scanner (14) are respectively arranged on a detection platform to perform different detections on different positions of the T-bridge (1).

8. The intelligent automatic detection device for concrete cracks in a railway T-bridge according to claim 2 is characterized by: The fixed arm (4) is provided with a fixed receiving groove (15) adapted to the first telescopic arm (5), and the first telescopic arm (5) can be folded into the fixed receiving groove (15).

9. The intelligent automatic detection device for concrete cracks in a railway T-bridge according to claim 2 is characterized by: The first telescopic arm (5) is provided with a first receiving groove (16) adapted to the second telescopic arm (6), and the second telescopic arm (6) can be folded and retracted into the first receiving groove (16).

10. The intelligent automatic detection device for concrete cracks in a railway T-bridge according to claim 2 is characterized in that: The second telescopic arm (6) is provided with a second receiving groove (17) corresponding to the third telescopic arm (7), and the third telescopic arm (7) can be folded and retracted into the second receiving groove (17).

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