A multi-angle measuring device for crack depth in highway bridges and tunnels

Abstract

The present invention provides a multi-angle measuring device for crack depth of highway bridges and tunnels, comprising a mobile frame, a main push rod, an ultrasonic detection component, a coupling agent adding component and a cleaning component. The present invention relates to the field of crack detection technology. By setting an ultrasonic detection component, ultrasonic detection transducers can be arranged on both sides of the crack. The distance between the ultrasonic detection transducer and the crack can be adjusted by the left-right symmetrical movement of the ultrasonic detection transducer, and multiple sets of data can be automatically measured, reducing manual operations and saving time and effort. A coupling agent adding component is provided, and the linkage rack is driven to rise through the output end of the auxiliary push rod, thereby driving the linkage gear to rotate, so that the adjusting cam can rotate, and the adjusting cam can control the rotation of the pressing arm, thereby automatically generating pressure on the extrusion chamber, squeezing the coupling agent in the extrusion chamber out of the rubber one-way port, and transporting it from the delivery hose to the detection end of the ultrasonic detection transducer, so as to achieve the technical effect of automatically adding coupling agent.

Description

Technical Field

[0001] The invention belongs to the technical field of crack detection, and in particular refers to a multi-angle measuring device for crack depth in a highway bridge or tunnel. Background Art

[0002] Crack depth measurement is an important part of engineering monitoring, especially in the fields of roads, bridges and tunnels. By accurately measuring the crack depth, the stability and safety of the structure can be evaluated, providing a basis for subsequent repair and maintenance work. There are many methods for measuring crack depth, among which the ultrasonic method is a more commonly used crack depth detection method. It uses the propagation characteristics of ultrasonic waves in media such as concrete, measures the reflection or diffraction time of ultrasonic waves at the crack, and calculates the crack depth in combination with the propagation speed of ultrasonic waves. It can achieve non-destructive testing without affecting the structure. It has high measurement accuracy and a wide range of applications. It can be used to measure the crack depth of a variety of materials.

[0003] The existing ultrasonic crack depth detection device mainly places a transmitting transducer on one side of the crack and a receiving transducer on the other side, transmits ultrasonic signals and records the reflection or diffraction time, and adjusts the distance between the transducer and the crack, and repeats the measurement multiple times to improve data reliability. However, the measurement process requires manual operation throughout the process, which is time-consuming and labor-intensive. When it is necessary to perform depth detection on cracks at the bottom of a bridge or on the top of a tunnel, the operator needs to climb to a higher position to manually detect the crack depth, which is cumbersome to operate and creates safety hazards. The existing automated crack depth detection device can only detect cracks on a single plane and cannot adapt to measurement surfaces with multiple angles.

[0004] Therefore, it is necessary to propose a multi-angle measurement device for the crack depth of a highway bridge and tunnel to solve the technical problems existing in the existing crack detection devices. Summary of the invention

[0005] In order to solve the above-mentioned existing problems, the present invention provides a multi-angle measurement device for the crack depth of a highway bridge tunnel, which is provided with an ultrasonic detection component. During the crack depth measurement process, the ultrasonic detection transducer can be arranged on both sides of the crack, and the distance between the ultrasonic detection transducer and the crack is adjusted by the left-right symmetrical movement of the ultrasonic detection transducer, so that multiple groups of data are automatically measured, and the operation of manually moving the ultrasonic detection transducer is reduced, saving time and labor; a coupling agent adding component is provided, and the output end of the auxiliary push rod drives the linkage rack to rise, thereby driving the linkage gear to rotate, so that the adjusting cam rotates, and the adjusting cam can control the rotation of the pressing arm, thereby automatically adjusting the production of the extrusion cavity. The coupling agent in the extrusion chamber is squeezed out of the rubber one-way port by generating pressure, and is transported from the delivery hose to the detection end of the ultrasonic detection transducer, thereby realizing the technical effect of automatically adding the coupling agent. When the output end of the auxiliary push rod retracts, the adjustment cam drives the pressing arm to reset, the extrusion chamber loses pressure and returns to its original state, and the coupling agent stored in the telescopic soft tank is sucked into the extrusion chamber and is reserved for next use. A cleaning component is provided, and the start of the cleaning brush motor is controlled by the contact between the first contact piece and the second contact piece, so that the rolling cleaning brush rotates to clean the detection surface. The dust shield can prevent dust from touching the detection end of the ultrasonic detection transducer, thereby realizing the automatic cleaning effect of the detection surface before detection.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A multi-angle measuring device for crack depth of a highway bridge tunnel comprises a mobile frame, a main push rod is arranged above the mobile frame, a coupling agent adding component is arranged above the main push rod, an ultrasonic detection component is arranged above the coupling agent adding component, and a cleaning component is arranged on one side of the ultrasonic detection component.

[0008] Among them, the ultrasonic detection component includes a support plate, an ultrasonic guide groove, an ultrasonic detection transducer and a crack detection camera. The support plate is arranged above the coupling agent addition component, the ultrasonic guide groove is arranged on the upper wall of the support plate, the ultrasonic detection transducer is symmetrically slidably arranged above the ultrasonic guide groove, and the crack detection camera is arranged in the middle position of the upper wall of the ultrasonic guide groove.

[0009] Furthermore, a sliding ring is provided on the upper side wall of the ultrasonic detection transducer for sliding up and down, an elastic rubber ring is connected between the lower edge of the sliding ring and the side wall of the ultrasonic detection transducer, the upper edge of the sliding ring is arranged higher than the upper wall of the detection end of the ultrasonic detection transducer, a coupling agent connecting tube is provided on one side of the ultrasonic detection transducer, the upper end of the coupling agent connecting tube is communicated with the interior of the sliding ring, a pressure sensor is provided at the lower end of the ultrasonic detection transducer, and a transducer moving block is provided on the lower wall of the pressure sensor.

[0010] Furthermore, upper connecting blocks are symmetrically provided at the left and right ends of the side walls of the support plate, and the lower walls of the upper connecting blocks are respectively provided with limiting springs, and limit sliding rods are symmetrically provided at the front and rear ends of the side walls of the support plate, and a third movable screw is rotatably provided in the ultrasonic guide groove, and a third screw motor is provided at the end of the third movable screw, and the output end of the third screw motor is connected to the end of the third movable screw, and the transducer moving block is slidably sleeved on the side wall of the third movable screw, and the threads at both ends of the third movable screw have opposite rotation directions, and the two symmetrical transducer moving blocks are respectively meshed with the two ends of the third movable screw with opposite rotation directions of the threads, and the front and rear side walls of the crack detection camera are respectively provided with rangefinders, and the number of the rangefinders is three.

[0011] Furthermore, a hinge shaft is provided at the upper end of the output end of the main push rod for rotating forward and backward, and a first adjusting motor is provided at the rotating shaft of the hinge shaft, the output end of the first adjusting motor is connected to the rotating shaft of the hinge shaft, the upper end of the hinge shaft is provided with a second adjusting motor, and an auxiliary push rod is provided on the upper wall of the second adjusting motor for horizontal rotation, the output end of the second adjusting motor is connected to the lower end of the auxiliary push rod, the output end of the auxiliary push rod is movably arranged below the support plate, and a linkage push frame is fixed at the output end of the auxiliary push rod, and linkage racks are symmetrically provided at the left and right ends of the linkage push frame, and lower connecting blocks are symmetrically provided at the left and right ends of the side wall of the fixed rod of the auxiliary push rod, and the lower ends of the limiting spring are respectively connected to the upper wall of the lower connecting block, and limiting sleeves are symmetrically provided at the front and rear ends of the side wall of the fixed rod of the auxiliary push rod, and the limiting slide rod is slidably arranged in the limiting sleeve.

[0012] Furthermore, the coupling agent adding component includes a support arm, a support tank, an extrusion chamber, a pressing arm and an adjusting cam, the support arm is symmetrically arranged at the lower end of the side wall of the fixed rod of the auxiliary push rod, the support tanks are respectively arranged at the ends of the support arms, a telescopic soft tank is provided below the support tank, the telescopic soft tank is connected with the support tank, the extrusion chamber is through-connected at the center of the upper wall of the support tank, the pressing arm is symmetrically arranged at the left and right sides of the auxiliary push rod, the pressing arm is rotatably arranged above the support arm, the adjusting cams are respectively symmetrically arranged at the left and right sides of the auxiliary push rod, the edges of the adjusting cams are respectively in contact with the lower wall of the pressing arm, a rotating shaft is connected between the front and rear opposite adjusting cams, a linkage gear is provided between the front and rear opposite adjusting cams, the linkage gear is arranged on the rotating shaft between the front and rear opposite adjusting cams, and the linkage gear is respectively meshed with the linkage rack.

[0013] Furthermore, the upper wall of the support arm is provided with a first rotating frame and a second rotating frame, the first rotating frame is arranged on a side of the second rotating frame close to the auxiliary push rod, the rotating shaft between the front and rear opposite adjusting cams is rotatably arranged on the upper end of the first rotating frame, the middle position of the pressing arm is rotatably arranged on the upper end of the second rotating frame, and the end of the pressing arm away from the auxiliary push rod is fixed to the upper wall of the extrusion chamber; a duckbill one-way opening is penetrated through the center of the upper wall of the support tank, the duckbill one-way opening is arranged in the extrusion chamber, a rubber one-way opening is penetrated through the center of the upper wall of the extrusion chamber, a conveying hose is penetrated and connected to the center of the upper wall of the extrusion chamber, the rubber one-way opening is arranged in the conveying hose, and the conveying hoses are respectively connected with the coupling agent connecting pipes.

[0014] The cleaning brush of claim 1, wherein the cleaning brush has a bottom end and a bottom end, the cleaning brush having a bottom end and a bottom end, and a cleaning brush having a bottom end and a bottom end.

[0015] The control rod has the form of a button, and the button has a first end for rotating the button, and the second end for rotating the button is connected to the control rod by a button.

[0016] Furthermore, the sealing strip is arranged above the upper edge of the sliding ring, the extrusion chamber and the telescopic soft tank are made of elastic rubber material, and when the first contact piece touches the second contact piece, the cleaning brush motor drives the rolling cleaning brush to rotate; the adjusting cam is semicircular, and the connecting shaft between the front and rear adjusting cams relative to each other is arranged at the center of the adjusting cam, and when the output end of the auxiliary push rod moves upward, the linkage rack drives the linkage gear to rotate, and the pressing arm rotates downward under the drive of the adjusting cam, and the extrusion chamber is deformed under pressure, and when the output end of the auxiliary push rod touches the lower wall of the support plate, the arc-shaped edge of the adjusting cam touches the lower wall of the pressing arm.

[0017] Furthermore, the first screw motor, the second screw motor, the control panel, the main push rod, the first adjustment motor, the second adjustment motor, the auxiliary push rod, the third screw motor, the rangefinder, the ultrasonic detection transducer, the pressure sensor, the crack detection camera, the first contact piece, the cleaning brush motor and the second contact piece are electrically connected to the main controller respectively.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows:

[0019] (1) An ultrasonic detection component is provided. During the crack depth measurement process, the ultrasonic detection transducer can be arranged on both sides of the crack. The distance between the ultrasonic detection transducer and the crack can be adjusted by moving the ultrasonic detection transducer symmetrically from left to right. Multiple sets of data can be automatically measured, reducing the manual operation of moving the ultrasonic detection transducer, saving time and effort.

[0020] (2) The height position of the ultrasonic detection component and the coupling agent adding component can be adjusted by the main push rod, which is suitable for the depth detection process of cracks at higher positions such as the bottom of a bridge or the top of a tunnel. The operator does not need to climb to the vicinity of the detection point for manual detection, which reduces safety hazards. At the same time, the articulated shaft and the second adjustment motor provide the ultrasonic detection component and the coupling agent adding component with two rotation directions, front and back and horizontal, so that the ultrasonic detection component and the coupling agent adding component can adjust their direction according to the inclination angle of the actual detection surface, which is suitable for detection surfaces with various inclination angles, with high flexibility and strong applicability;

[0021] (3) The crack detection camera can obtain detailed images of the crack, and through the adaptive adjustment of the articulated shaft and the second adjustment motor, the crack detection camera can be aligned with the middle position of the crack and automatically measure the width of the crack;

[0022] (4) A coupling agent adding component is provided, and the output end of the auxiliary push rod drives the linkage rack to rise, thereby driving the linkage gear to rotate, causing the adjusting cam to rotate. The adjusting cam can control the rotation of the pressing arm, thereby automatically generating pressure on the extrusion chamber, squeezing the coupling agent in the extrusion chamber out of the rubber one-way port, and transporting it from the delivery hose to the detection end of the ultrasonic detection transducer, thereby achieving the technical effect of automatically adding coupling agent. When the output end of the auxiliary push rod retracts, the adjusting cam drives the pressing arm to reset, the extrusion chamber loses pressure and returns to its original state, and the coupling agent stored in the telescopic soft tank is sucked into the extrusion chamber and left for next use;

[0023] (5) After the output end of the auxiliary push rod touches the support plate, it continues to apply thrust, so that the ultrasonic guide groove gradually contacts the detection surface. During this process, the edge of the arc segment of the adjustment cam contacts the pressing arm. The adjustment cam continues to rotate so that the pressing arm will not continue to apply pressure to the extrusion chamber, so that the pressing arm and the extrusion chamber maintain a fixed extrusion state, avoiding the consequences of the pressing arm continuously pressing the extrusion chamber to damage the extrusion chamber or the inability of the auxiliary push rod output end to continuously apply thrust, resulting in the mechanism being stuck;

[0024] (6) The coupling agent in the telescopic soft tank enters the coupling agent connecting pipe through the delivery hose and is delivered to the sliding ring. The sliding ring plays the role of temporarily storing the coupling agent. When the ultrasonic detection transducer approaches the detection surface under the push of the output end of the auxiliary push rod, the sliding ring will first contact the detection surface. The sliding ring is pushed in the opposite direction of the detection surface and slides in the direction close to the ultrasonic guide groove until the detection end of the ultrasonic detection transducer touches the detection surface. At this time, the coupling agent in the sliding ring is automatically distributed between the detection surface and the detection end of the ultrasonic detection transducer;

[0025] (7) A cleaning component is provided. The output end of the auxiliary push rod pushes the ultrasonic guide groove to approach the detection surface. The dust shield plate approaches the detection surface together with the ultrasonic guide groove. The sealing strip first contacts the detection surface. The dust shield sliding rod gradually penetrates into the dust shield sleeve. The first contact piece contacts the second contact piece. The cleaning brush motor is started to control the rolling cleaning brush to rotate to clean the detection surface. The dust shield plate can prevent dust from touching the detection end of the ultrasonic detection transducer, thereby achieving an automatic cleaning effect on the detection surface before detection. When the ultrasonic guide groove continues to approach the detection surface, the first contact piece will be separated from the contact with the second contact piece, and the rolling cleaning brush will stop the cleaning process. At this time, the sliding ring and the output end of the ultrasonic detection transducer contact the detection surface in turn to implement the detection process. After the detection is completed, the ultrasonic detection transducer is moved to the detection surface that has been cleaned by the rolling cleaning brush by the moving frame to perform the next set of detection, and so on.

[0026] (8) A first movable screw rod and a second movable screw rod are arranged on the movable frame, so that the moving range of the main push rod is larger and the adjustment is more flexible, which facilitates the precise adjustment of the positions of the ultrasonic detection component, the coupling agent adding component and the cleaning component. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a multi-angle measurement device for crack depth in a highway bridge and tunnel provided by the present invention;

[0028] Figure 2 A first structural schematic diagram of an ultrasonic detection component, a coupling agent adding component and a cleaning component;

[0029] Figure 3 A second structural schematic diagram of an ultrasonic detection component, a coupling agent adding component and a cleaning component;

[0030] Figure 4 A third structural schematic diagram of an ultrasonic detection component, a coupling agent adding component and a cleaning component;

[0031] Figure 5 It is a schematic diagram of the structure when the pressing arm does not apply pressure to the extrusion chamber;

[0032] Figure 6 It is a schematic diagram of the structure when the pressing arm applies pressure to the extrusion chamber;

[0033] Figure 7 It is a schematic diagram of the explosion structure of the support tank, the extrusion chamber and the delivery hose;

[0034] Figure 8 It is a schematic diagram of the top view structure of the ultrasonic detection component;

[0035] Fig. 9 It is a structural schematic diagram of an ultrasonic detection transducer;

[0036] Fig.10 It is a cross-sectional view of the ash blocking slide rod and the ash blocking sleeve.

[0037] Among them, 1. Mobile frame, 11. First mobile screw rod, 111. First screw rod motor, 12. Mobile slide rod, 13. Mobile slot, 131. Second mobile screw rod, 132. Second screw rod motor, 14. Handle, 15. Control panel, 151. Main controller, 2. Main push rod, 21. Articulated shaft, 211. First adjustment motor, 22. Second adjustment motor, 23. Second push rod, 231. Linkage push frame, 232. Linkage rack, 233. Lower connecting block, 234. Limit sleeve, 3. Ultrasonic detection component, 31. Support plate, 311. Upper connecting block, 312. Limit spring, 313. Limit slide rod, 32. Ultrasonic guide slot, 321. Third mobile screw rod, 322. Third screw rod motor, 323. Rangefinder, 33. Ultrasonic detection transducer, 331. Transducer moving block, 332. Pressure sensor, 333. Sliding ring, 334. Elastic rubber ring, 335. Coupling agent connecting tube, 34. Crack detection camera, 4. Coupling agent adding component, 41. Support arm, 411. First rotating frame, 412. Second rotating frame, 42. Support tank, 421. Telescopic soft tank, 422. Duckbill one-way mouth, 43. Extrusion chamber, 431. Rubber one-way mouth, 432. Delivery hose, 44. Pressing arm, 45. Adjusting cam, 451. Linkage gear, 5. Cleaning component, 51. Dust blocking plate, 511. Sealing strip, 512. Dust blocking slide bar, 5121. First contact piece, 52. Rolling cleaning brush, 53. Cleaning brush motor, 54. Dust blocking sleeve, 541. Second contact piece, 542. Reset spring. DETAILED DESCRIPTION

[0038] The technical solution of this patent is further described in detail below in conjunction with specific implementations. The technical features or connection relationships described in the present invention that are not described in detail are all existing technologies adopted.

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0040] like Figure 1 As shown, a multi-angle measuring device for crack depth of a highway bridge and tunnel provided by the present invention comprises a moving frame 1, a main push rod 2, an ultrasonic detection component 3, a coupling agent adding component 4 and a cleaning component 5, wherein the main push rod 2 is arranged above the moving frame 1, the coupling agent adding component 4 is arranged above the main push rod 2, the ultrasonic detection component 3 is arranged above the coupling agent adding component 4, and the cleaning component 5 is arranged on one side of the ultrasonic detection component 3;

[0041] A first moving screw rod 11 and a moving slide rod 12 are symmetrically arranged on the upper wall of the moving frame 1 front and back, a first screw motor 111 is arranged at the end of the first moving screw rod 11, and the output end of the first screw motor 111 is connected to the end of the first moving screw rod 11; a moving groove 13 is arranged on the upper side of the moving frame 1 for sliding left and right; the lower walls of the front and rear ends of the moving groove 13 are respectively sleeved on the side walls of the first moving screw rod 11 and the moving slide rod 12; the first moving screw rod 11 and the moving groove 13 are threadedly connected; a second moving screw rod 131 is rotatably arranged in the moving groove 13; a second screw motor 132 is arranged at the end of the second moving screw rod 131; the output end of the second screw motor 132 is connected to the end of the second moving screw rod 131; the lower end of the main push rod 2 is sleeved on the side wall of the second moving screw rod 131; the second moving screw rod 131 is threadedly connected to the lower end of the main push rod 2; a handle 14 is arranged at the rear end of the moving frame 1; a control panel 15 is arranged at the rear end of the moving frame 1; a main controller 151 is arranged below the control panel 15.

[0042] like Figure 2 , Figure 4 , Figure 8 and Fig. 9 As shown, the upper end of the output end of the main push rod 2 is provided with a hinge shaft 21 for front-back rotation, and a first adjusting motor 211 is provided at the rotation axis of the hinge shaft 21, and the output end of the first adjusting motor 211 is connected to the rotation axis of the hinge shaft 21, and a second adjusting motor 22 is provided at the upper end of the hinge shaft 21, and an auxiliary push rod 23 is provided on the upper wall of the second adjusting motor 22 for horizontal rotation, and the output end of the second adjusting motor 22 is connected to the lower end of the auxiliary push rod 23, and a linkage push frame 231 is fixed to the output end of the auxiliary push rod 23, and linkage racks 232 are symmetrically provided at the left and right ends of the linkage push frame 231, and lower connecting blocks 233 are symmetrically provided at the left and right ends of the fixed rod side wall of the auxiliary push rod 23, and limiting sleeves 234 are symmetrically provided at the front and rear ends of the fixed rod side wall of the auxiliary push rod 23;

[0043] The ultrasonic detection assembly 3 includes a support plate 31, an ultrasonic guide groove 32, an ultrasonic detection transducer 33 and a crack detection camera 34. The support plate 31 is arranged above the coupling agent adding assembly 4, the output end of the auxiliary push rod 23 is arranged below the support plate 31 for vertical movement, the ultrasonic guide groove 32 is arranged on the upper wall of the support plate 31, the ultrasonic detection transducer 33 is arranged above the ultrasonic guide groove 32 for horizontal symmetry sliding, and the crack detection camera 34 is arranged in the middle position of the upper wall of the ultrasonic guide groove 32;

[0044] A sliding ring 333 is provided on the upper side wall of the ultrasonic detection transducer 33 so as to slide up and down. An elastic rubber ring 334 is connected between the lower edge of the sliding ring 333 and the side wall of the ultrasonic detection transducer 33. The upper edge of the sliding ring 333 is arranged higher than the upper wall of the detection end of the ultrasonic detection transducer 33. A coupling agent connecting tube 335 is provided on one side of the ultrasonic detection transducer 33. The upper end of the coupling agent connecting tube 335 is connected with the interior of the sliding ring 333. A pressure sensor 332 is provided on the lower end of the ultrasonic detection transducer 33. A transducer moving block 331 is provided on the lower wall of the pressure sensor 332.

[0045] Upper connecting blocks 311 are symmetrically provided at the left and right ends of the side walls of the support plate 31, and a limiting spring 312 is connected between the lower wall of the upper connecting block 311 and the upper wall of the lower connecting block 233. Limiting slide bars 313 are symmetrically provided at the front and rear ends of the side walls of the support plate 31, and the limiting slide bars 313 are slidably arranged in the limiting sleeve 234. A third movable screw rod 321 is rotatably arranged in the ultrasonic guide groove 32, and a third screw motor 322 is provided at the end of the third movable screw rod 321. The output end of the third screw motor 322 is connected to the end of the third movable screw rod 321. The transducer moving block 331 is slidably sleeved on the side wall of the third movable screw rod 321. The threads at both ends of the third movable screw rod 321 are rotated in opposite directions. The two symmetrical transducer moving blocks 331 are respectively meshed with the two ends of the third movable screw rod 321 with opposite threads. The front and rear side walls of the crack detection camera 34 are respectively provided with rangefinders 323, and the number of rangefinders 323 is three.

[0046] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the coupling agent adding component 4 includes a support arm 41, a support tank 42, an extrusion chamber 43, a pressing arm 44 and an adjusting cam 45. The support arm 41 is symmetrically arranged at the lower end of the side wall of the fixed rod of the auxiliary push rod 23. The support tanks 42 are respectively arranged at the ends of the support arms 41. A telescopic soft tank 421 is arranged below the support tank 42. The telescopic soft tank 421 is connected with the support tank 42. The extrusion chamber 43 is arranged at the center of the upper wall of the support tank 42. The extrusion chamber 43 and the telescopic soft tank 421 are made of elastic rubber. The pressing arm 44 is symmetrically arranged at the lower end of the side wall of the fixed rod of the auxiliary push rod 23. The support tanks 42 are respectively arranged at the ends of the support arms 41. A telescopic soft tank 421 is arranged below the support tank 42. The telescopic soft tank 421 is connected with the support tank 42. The extrusion chamber 43 is connected at the center of the upper wall of the support tank 42. The extrusion chamber 43 and the telescopic soft tank 421 are made of elastic rubber. The adjusting cams 45 are symmetrically arranged on the left and right sides of the auxiliary push rod 23, and the pressing arm 44 is rotatably arranged above the supporting arm 41. The adjusting cams 45 are symmetrically arranged on the left and right sides of the auxiliary push rod 23, and the edges of the adjusting cams 45 are respectively in contact with the lower wall of the pressing arm 44. A rotating shaft is connected between the front and rear adjusting cams 45 opposite to each other, and a linkage gear 451 is arranged between the front and rear adjusting cams 45 opposite to each other. The linkage gear 451 is arranged on the rotating shaft between the front and rear adjusting cams 45 opposite to each other, and the linkage gear 451 is respectively meshed with the linkage rack 232;

[0047] The upper wall of the support arm 41 is provided with a first rotating frame 411 and a second rotating frame 412, the first rotating frame 411 is arranged on a side of the second rotating frame 412 close to the secondary push rod 23, the rotating shaft between the front and rear opposite adjusting cams 45 is rotatably arranged on the upper end of the first rotating frame 411, the middle position of the pressing arm 44 is rotatably arranged on the upper end of the second rotating frame 412, and the end of the pressing arm 44 away from the secondary push rod 23 is fixed to the upper wall of the extrusion chamber 43; a duckbill one-way port 422 is penetrated through the center of the upper wall of the support tank 42, and the duckbill one-way port 422 is arranged in the extrusion chamber 43, and a rubber one-way port 431 is penetrated through the center of the upper wall of the extrusion chamber 43, and a delivery hose 432 is connected to the center of the upper wall of the extrusion chamber 43, and the rubber one-way port 431 is arranged in the delivery hose 432, and the delivery hose 432 is respectively connected with the coupling agent connecting pipe 335;

[0048] The adjusting cam 45 is semicircular, and the connecting shaft between the front and rear adjusting cams 45 is arranged at the center of the adjusting cam 45. When the output end of the auxiliary push rod 23 moves upward, the linkage rack 232 drives the linkage gear 451 to rotate, and the pressing arm 44 rotates downward under the drive of the adjusting cam 45, and the extrusion cavity 43 is compressed and deformed. When the output end of the auxiliary push rod 23 touches the lower wall of the supporting plate 31, the arc-shaped edge of the adjusting cam 45 touches the lower wall of the pressing arm 44.

[0049] like Figure 2 , Figure 3 and Fig.10 As shown, the cleaning assembly 5 includes a dust baffle plate 51 and a rolling cleaning brush 52. The dust baffle plate 51 is slidable up and down on one side of the ultrasonic guide groove 32. A sealing strip 511 is provided on the upper edge of the dust baffle plate 51. The sealing strip 511 is arranged higher than the upper edge of the sliding ring 333. The rolling cleaning brush 52 is arranged in a horizontal array and rotates on the upper end of the side wall of the dust baffle plate 51 away from the ultrasonic guide groove 32. A cleaning brush motor 53 is provided at the end of the rotating shaft of the rolling cleaning brush 52. The output end of the cleaning brush motor 53 is connected to the end of the rotating shaft of the rolling cleaning brush 52. The ultrasonic guide groove 32 is symmetrically provided with dust baffle plates 51 on both ends of the side close to the dust baffle plate 51. The ash sleeve 54 and the ash blocking plate 51 are symmetrically provided with ash blocking slide bars 512 at the left and right ends of the side walls close to the ultrasonic guide groove 32. The ash blocking slide bars 512 are respectively slidably arranged in the ash blocking sleeve 54. The side walls of the ash blocking slide bars 512 located in the ash blocking sleeve 54 are provided with a first contact piece 5121, and the inner side wall of the ash blocking sleeve 54 is provided with a second contact piece 541. A return spring 542 is connected between the lower end of the ash blocking slide bar 512 and the inner lower wall of the ash blocking sleeve 54. When the ash blocking slide bar 512 slides downward, the first contact piece 5121 and the second contact piece 541 are in contact with each other, and the cleaning brush motor 53 drives the rolling cleaning brush 52 to rotate.

[0050] like Figure 1-Figure 10As shown, the first screw motor 111, the second screw motor 132, the control panel 15, the main push rod 2, the first adjusting motor 211, the second adjusting motor 22, the auxiliary push rod 23, the third screw motor 322, the rangefinder 323, the ultrasonic detection transducer 33, the pressure sensor 332, the crack detection camera 34, the first contact piece 5121, the cleaning brush motor 53 and the second contact piece 541 are electrically connected to the main controller 151 respectively.

[0051] Working principle and workflow: For bridges and tunnels, cracks may occur at the bottom of the bridge and the top of the tunnel. The cracks are at a higher position. The inspector can move the device to the bottom of the crack position that needs to be inspected in the bridge or tunnel through the mobile frame 1, and control the ultrasonic detection component 3 to approach the crack position through the control panel 15. The main controller 151 will control the main push rod 2 to start, and the output end of the main push rod 2 drives the auxiliary push rod 23 to rise. The support plate 31 is connected to the auxiliary push rod 23 through the limiting spring 312 and the limiting slide bar 313. The support plate 31 rises together with the auxiliary push rod 23, driving the ultrasonic guide groove 32 and the ultrasonic detection transducer 33 to gradually approach the crack position. Before the ultrasonic detection transducer 33 contacts the detection surface, the cleaning component 5 can be used to clean the position to be detected. During cleaning, the main push rod 2 can continue to drive the ultrasonic detection component 3 to rise, and the cleaning component 5 rises together with the ultrasonic detection component 3. The upper edge of the sealing strip 511 is higher than the upper edge of the sliding ring 333, so the sealing strip 511 will first touch the detection surface, and the rolling cleaning brush 52 will also touch the detection surface. As the ultrasonic detection component 3 continues to rise, the dust blocking slide bar 512 will slide downward in the dust blocking sleeve 54, so that the first contact piece 5121 and the second contact piece 541 are in contact. After the main controller 151 obtains the contact instruction, it automatically starts the cleaning brush motor 53, so that the rolling cleaning brush 52 starts to rotate to clean the detection surface. The dust on the detection surface swept off by the rolling cleaning brush 52 will be blocked by the dust blocking plate 51 to prevent dust from contacting the ultrasonic detection transducer 33 and interfering with the instrument.

[0052] After the cleaning component 5 has finished cleaning the detection surface, the main push rod 2 drives the ultrasonic detection component 3 and the cleaning component 5 to descend together, the sealing strip 511 breaks away from the contact with the detection surface, and the dust blocking slide bar 512 slides upward to return to its original position under the elastic action of the reset spring 542. The user can move the main push rod 2 along the extension direction of the crack by moving the frame 1 for a distance, so that the ultrasonic detection component 3 is directly under the detection surface that has been cleaned by the cleaning component 5. The crack detection camera 34 can obtain an image at the crack position, and the detection personnel can fine-tune the position of the main push rod 2 according to the crack image taken by the crack detection camera 34. The main controller 151 can control the first screw motor 111 and the second screw motor 132 to respectively drive the first moving screw 11 and the second moving screw 131 to rotate, thereby respectively controlling the left and right movement of the moving slot 13 and the front and back movement of the main push rod 2, so as to achieve fine-tuning of the position of the main push rod 2, thereby fine-tuning the position of the ultrasonic detection component 3, so that the crack detection The center of the camera 34 is always facing the middle position of the crack, ensuring that the ultrasonic detection transducers 33 are symmetrically located on the left and right sides of the crack. If the line connecting the two ultrasonic detection transducers 33 is not perpendicular to the extension direction of the crack, the main controller 151 can automatically control the second adjusting motor 22 to rotate, so that the auxiliary push rod 23 rotates horizontally as a whole, driving the crack detection camera 34 to rotate, so that the crack photographed by the crack detection camera 34 is in a vertical shape in the shooting picture. At this time, the ultrasonic detection transducer 33 can be symmetrically arranged on the left and right sides of the crack; the main controller 151 can automatically control the second adjusting motor 22 to adaptively adjust the rotation angle of the crack detection camera 34 according to the crack image photographed by the crack detection camera 34, so that the line between the two ultrasonic detection transducers 33 is always perpendicular to the extension direction of the crack. The recognition of the crack morphology by the crack detection camera 34 involves image recognition technology, which belongs to the existing technology, and the specific principles are not repeated here.

[0053] After the position of the ultrasonic detection transducer 33 is adjusted, the main push rod 2 is started again and drives the ultrasonic detection component 3 and the cleaning component 5 to move upward as a whole, and makes the sealing strip 511 contact the detection surface again, the dust blocking plate 51 moves downward and drives the dust blocking sliding bar 512 to move downward, the first contact piece 5121 and the second contact piece 541 touch each other again, so that the cleaning brush motor 53 is started again and drives the rolling cleaning brush 52 to rotate, and the detection surface is cleaned. When the rolling cleaning brush 52 rotates driven by the cleaning brush motor 53, the upper edge of the sliding ring 333 has not yet contacted the detection surface, the auxiliary push rod 23 will be started, and the output end of the auxiliary push rod 23 rises, driving the linkage push frame 231 to rise, the linkage rack 232 to rise, and driving the linkage gear 451 to rotate, so that the adjusting cam 45 rotates synchronously, the adjusting cam 45 is semicircular, and when the auxiliary push rod 23 is not started, the edge of the straight section of the adjusting cam 45 contacts the pressing arm 44. When the adjusting cam 45 starts to rotate, the edge of the adjusting cam 45 will drive the pressing arm 44 to rotate downward, and the end of the pressing arm 44 applies pressure to the extrusion chamber 43 to deform the extrusion chamber 43. The telescopic soft tank 421 is filled with coupling agent required for ultrasonic inspection. In the initial state, there is no coupling agent in the extrusion chamber 43. When the pressing arm 44 compresses the extrusion chamber 43 to deform, the air in the extrusion chamber 43 will enter the delivery hose 432 through the rubber one-way port 431. When the auxiliary push rod 23 descends and drives the pressing arm 44 to restore the initial state, the extrusion chamber 43 loses the pressure of the pressing arm 44, and the inside will produce Negative pressure is generated, at which time the coupling agent in the telescopic soft tank 421 is sucked into the extrusion chamber 43 from the duckbill one-way port 422, and when the output end of the auxiliary push rod 23 drives the linkage push frame 231 to rise again, the pressing arm 44 applies pressure to the extrusion chamber 43 again to deform the extrusion chamber 43, thereby squeezing the coupling agent in the extrusion chamber 43 into the delivery hose 432. Through the multiple rising and falling actions of the output end of the auxiliary push rod 23, the coupling agent in the telescopic soft tank 421 can be automatically transported to the delivery hose 432 and enter the sliding ring 333 through the coupling agent connecting pipe 335. When the coupling agent is added to the sliding ring 333 for the first time, the auxiliary push rod 23 can be repeatedly raised and lowered to realize the delivery of the coupling agent. The repeated lifting and lowering actions of the auxiliary push rod 23 can be automatically controlled by the main controller 151. The coupling agent 432 and the coupling agent connecting tube 335 are already filled with coupling agent. When the coupling agent needs to be added to the sliding ring 333, it can be realized by only one upward movement of the output end of the auxiliary push rod 23 without repeated lifting. The rubber one-way port 431 is in the shape of an upwardly convex arc surface, and a slit is provided in the center of the arc surface. The coupling agent in the extrusion chamber 43 can enter the delivery hose 432 through the rubber one-way port 431, while the coupling agent in the delivery hose 432 will not enter the extrusion chamber 43 through the rubber one-way port 431. The duckbill one-way port 422 also has a one-way characteristic.The coupling agent can only move in one direction from the telescopic soft tank 421 into the extrusion chamber 43 and then into the delivery hose 432 from the extrusion chamber 43. The rubber one-way port 431 and the duckbill one-way port 422 belong to the prior art, and the specific principle thereof will not be described in detail here.

[0054] After the coupling agent is added to the sliding ring 333, the output end of the auxiliary push rod 23 will continue to rise and press against the lower wall of the support plate 31. At this time, the arc-shaped edge of the adjusting cam 45 is completely in contact with the pressing arm 44, and the limiting spring 312 maintains the fixed position between the support plate 31 and the fixed rod part of the auxiliary push rod 23. When the auxiliary push rod 23 applies thrust to the support plate 31, the limiting spring 312 is stretched, and the limiting slide bar 313 will slide upward in the limiting sleeve 234. At this time, when the linkage rack 232 drives the linkage gear 451 to rotate, the adjusting cam 45 continues to rotate and the pressing arm 44 will not continue to apply pressure to the extrusion chamber 43, so that the pressing arm 44 and the extrusion chamber 43 maintain a fixed extrusion state, such as Figure 6 As shown, the pressing arm 44 is prevented from continuously pressing the extrusion chamber 43, which may cause the extrusion chamber 43 to be damaged or the output end of the auxiliary push rod 23 may be unable to continuously apply thrust, causing the mechanism to be stuck; as the output end of the auxiliary push rod 23 continues to push the support plate 31 to rise, the ultrasonic guide groove 32 drives the two symmetrical ultrasonic detection transducers 33 to gradually approach the detection surface, at this time, the dust blocking slide bar 512 will continue to descend, the second contact piece 541 will be separated from the contact of the first contact piece 5121, the cleaning brush motor 53 will stop running, the rolling cleaning brush 52 will stop the cleaning process, the sliding ring 333 will first contact the detection surface, the ultrasonic detection transducer 33 will continue to approach the detection surface, the sliding ring 333 will slide downward until the detection end of the ultrasonic detection transducer 33 touches the detection surface, at this time, the coupling agent in the sliding ring 333 is distributed between the detection end and the detection surface of the ultrasonic detection transducer 33, With the automatic addition of coupling agent, the pressure sensor 332 can measure the pressure exerted by the detection surface on the ultrasonic detection transducer 33. The value of the pressure sensor 332 is monitored by the main controller 151 to ensure that the ultrasonic detection transducer 33 contacts the detection surface with appropriate pressure to prevent the ultrasonic detection transducer 33 from being damaged by excessive pressure or failing to make effective contact with the detection surface. One of the two ultrasonic detection transducers 33 sends an ultrasonic signal and the other receives an ultrasonic signal. The depth of the crack is determined by the time it takes the ultrasonic signal to bypass the crack. The measurement principle is the existing technology and will not be described in detail here. At the same time, the crack detection camera 34 is set at the middle position of the crack to measure the width of the crack. The method of taking a crack picture and measuring its width by the crack detection camera 34 is the existing technology and the principle will not be described in detail here.

[0055] After measuring the depth data at a group of measuring points, the auxiliary push rod 23 retracts, the ultrasonic guide groove 32 moves downward to return to its original position under the elastic action of the limiting spring 312, the ultrasonic detection transducer 33 descends, and the sliding ring 333 slides upward to return to its original position under the elastic action of the elastic rubber ring 334. As the ultrasonic detection transducer 33 continues to descend, the sliding ring 333 breaks away from the contact detection surface. At this time, the third screw motor 322 automatically starts and drives the third moving screw 321 to rotate, so that the symmetrical transducer moving block 331 is aligned with the side wall of the third moving screw 321. The ultrasonic detection transducer 33 is moved toward or away from the crack to adjust the distance between the ultrasonic detection transducer 33 and the crack. After moving the ultrasonic detection transducer 33 to other detection points, the above detection process is repeated to obtain multiple sets of crack depth data at different distances between the ultrasonic detection transducer 33 and the crack. The average value of the multiple sets of crack depth data is calculated by the main controller 151 to obtain a more accurate depth value of the crack. The specific calculation method can refer to the formula for detecting crack depth by flat measurement method in the "Technical Specifications for Ultrasonic Detection of Concrete Defects", which will not be repeated here.

[0056] After measuring the depth of a crack at one position, the main push rod 2 and the auxiliary push rod 23 descend, so that the ultrasonic detection component 3, the coupling agent adding component 4 and the cleaning component 5 return to their initial positions. The user can adjust the position of the device by moving the frame 1, move the ultrasonic detection component 3 again to the bottom of the detection surface previously cleaned by the cleaning component 5, repeat the above detection operation, and the cleaning component 5 simultaneously cleans another detection surface. The cleaning component 5 always cleans the detection surface before the ultrasonic detection component 3 performs detection, thereby reducing the tedious operation of manual cleaning and saving time and effort.

[0057] It should be noted that the above detection process belongs to cross-crack detection. In the actual crack depth detection process, two ultrasonic detection transducers 33 are required to perform non-cross-crack detection, that is, the two ultrasonic detection transducers 33 are arranged on one side of the crack, and the acoustic time between the two ultrasonic detection transducers 33 is measured, so as to accurately measure the propagation time of the ultrasonic wave in the structure without crossing the crack, avoid the influence of the crack on the ultrasonic wave propagation, and thus more accurately reflect the physical properties of the structure. When non-cross-crack detection is required, the user can control the second adjustment motor 22 to start through the control panel 15, so that the ultrasonic detection component 3, the coupling agent adding component 4 and the cleaning component 5 are rotated horizontally by 90 degrees at the same time, so that the connection line between the ultrasonic detection transducers 33 is parallel to the extension direction of the crack, and the main push rod 2 is fine-tuned through the first movable screw 11 and the second movable screw 131, so that the ultrasonic detection transducer 33 performs acoustic time measurement on the structure on one side of the crack.

[0058] When the detection surface has a certain inclination angle, the user controls the first adjustment motor 211 to start through the control panel 15, so that the ultrasonic detection component 3, the coupling agent adding component 4 and the cleaning component 5 rotate back and forth as a whole, thereby adjusting the inclination angle of the ultrasonic detection transducer 33. The three rangefinders 323 can measure the distance between them and the detection surface. When the distance values ​​measured by the three rangefinders 323 are exactly the same, it means that the ultrasonic detection transducer 33 and the crack detection camera 34 are set perpendicular to the detection surface. At this time, the first adjustment motor 211 stops running, the inclination angle of the ultrasonic detection transducer 33 is fixed, and the above detection process is repeated, thereby achieving the technical effect of multi-angle measurement.

[0059] The above detection process involves the measurement of the crack depth at the bottom of the bridge and the top of the tunnel. If it is necessary to measure the depth of cracks on the upper surface of the road or the top surface of the bridge, the main push rod 2, the ultrasonic detection component 3, the coupling agent adding component 4 and the cleaning component 5 can be inverted as a whole so that the ultrasonic detection transducer 33 is arranged downward. The structures of the ultrasonic detection component 3, the coupling agent adding component 4 and the cleaning component 5 remain unchanged, and the detection principle and detection process are the same as those mentioned above. The specific structure is similar to that of the present embodiment and will not be repeated here.

[0060] The above is the overall workflow of the present invention, and you can repeat this step next time you use it.

[0061] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A multi-angle measuring device for crack depth in a highway bridge tunnel, comprising a mobile frame (1), Features: A main push rod (2) is provided above the mobile frame (1), a coupling agent adding assembly (4) is provided above the main push rod (2), an ultrasonic detection assembly (3) is provided above the coupling agent adding assembly (4), and a cleaning assembly (5) is provided on one side of the ultrasonic detection assembly (3), wherein the ultrasonic detection assembly (3) comprises a support plate (31), an ultrasonic guide groove (32), an ultrasonic detection transducer (33) and a crack detection camera (34), the support plate (31) is provided above the coupling agent adding assembly (4), the ultrasonic guide groove (32) is provided on the upper wall of the support plate (31), the ultrasonic detection transducer (33) is symmetrically slidably provided above the ultrasonic guide groove (32), and the crack detection camera (34) is provided at the middle position of the upper wall of the ultrasonic guide groove (32); A sliding ring (333) is provided on the upper side wall of the ultrasonic detection transducer (33) so as to slide up and down, an elastic rubber ring (334) is connected between the lower edge of the sliding ring (333) and the side wall of the ultrasonic detection transducer (33), the upper edge of the sliding ring (333) is arranged higher than the upper wall of the detection end of the ultrasonic detection transducer (33), a coupling agent connecting tube (335) is provided on one side of the ultrasonic detection transducer (33), the upper end of the coupling agent connecting tube (335) is connected to the inside of the sliding ring (333), a pressure sensor (332) is provided on the lower end of the ultrasonic detection transducer (33), and a transducer moving block (331) is provided on the lower wall of the pressure sensor (332); Upper connecting blocks (311) are symmetrically provided at the left and right ends of the side wall of the support plate (31), and limiting springs (312) are respectively provided on the lower walls of the upper connecting blocks (311). Limiting sliding rods (313) are symmetrically provided at the front and rear ends of the side wall of the support plate (31). A third movable screw rod (321) is rotatably provided in the ultrasonic guide groove (32), and a third screw motor (322) is provided at the end of the third movable screw rod (321). The output end of the third screw motor (322) is connected to the third movable screw rod (321). The ends of the three movable screw rods (321) are connected, the transducer moving block (331) is slidably sleeved on the side wall of the third movable screw rod (321), the threads at both ends of the third movable screw rod (321) are in opposite directions, and the two symmetrical transducer moving blocks (331) are respectively meshed with the two ends of the third movable screw rod (321) with opposite directions of thread rotation, and the front and rear side walls of the crack detection camera (34) are respectively provided with rangefinders (323), and the number of the rangefinders (323) is three; The upper end of the output end of the main push rod (2) is provided with a hinge shaft (21) for forward and backward rotation, and a first adjustment motor (211) is provided at the rotation axis of the hinge shaft (21). The output end of the first adjustment motor (211) is connected to the rotation axis of the hinge shaft (21). The upper end of the hinge shaft (21) is provided with a second adjustment motor (22). The upper wall of the second adjustment motor (22) is provided with an auxiliary push rod (23) for horizontal rotation. The output end of the second adjustment motor (22) is connected to the lower end of the auxiliary push rod (23). The output end of the auxiliary push rod (23) is provided on the support for upward and downward movement. Below the support plate (31), a linkage push frame (231) is fixed to the output end of the auxiliary push rod (23), linkage racks (232) are symmetrically provided at the left and right ends of the linkage push frame (231), lower connecting blocks (233) are symmetrically provided at the left and right ends of the fixed rod side wall of the auxiliary push rod (23), the lower ends of the limiting spring (312) are respectively connected to the upper wall of the lower connecting block (233), and limiting sleeves (234) are symmetrically provided at the front and rear ends of the fixed rod side wall of the auxiliary push rod (23), and the limiting slide rod (313) is slidably provided in the limiting sleeve (234); The coupling agent adding assembly (4) comprises a support arm (41), a support tank (42), an extrusion chamber (43), a pressing arm (44) and an adjusting cam (45); the support arm (41) is symmetrically arranged at the lower end of the side wall of the fixing rod of the auxiliary push rod (23); the support tank (42) is respectively arranged at the end of the support arm (41); a telescopic soft tank (421) is arranged below the support tank (42); the telescopic soft tank (421) is connected to the support tank (42); the extrusion chamber (43) is arranged through the center of the upper wall of the support tank (42); the pressing arm (44) is symmetrically arranged at the lower end of the side wall of the auxiliary push rod (23); ), the pressing arm (44) is rotatably arranged above the supporting arm (41), the adjusting cams (45) are symmetrically arranged on the left and right sides of the auxiliary push rod (23), the edges of the adjusting cams (45) are respectively in contact with the lower wall of the pressing arm (44), a rotating shaft is connected between the front and rear opposite adjusting cams (45), a linkage gear (451) is arranged between the front and rear opposite adjusting cams (45), the linkage gear (451) is arranged on the rotating shaft between the front and rear opposite adjusting cams (45), and the linkage gear (451) is respectively meshed with the linkage rack (232); The upper wall of the support arm (41) is provided with a first rotating frame (411) and a second rotating frame (412); the first rotating frame (411) is arranged on a side of the second rotating frame (412) close to the auxiliary push rod (23); a rotating shaft between the front and rear opposite adjustment cams (45) is rotatably arranged on the upper end of the first rotating frame (411); the middle position of the pressing arm (44) is rotatably arranged on the upper end of the second rotating frame (412); an end of the pressing arm (44) away from the auxiliary push rod (23) is fixed to the extrusion chamber (43); a duckbill one-way port (422) is provided through the center of the upper wall of the support tank (42), the duckbill one-way port (422) is arranged in the extrusion cavity (43), a rubber one-way port (431) is provided through the center of the upper wall of the extrusion cavity (43), a delivery hose (432) is connected through the center of the upper wall of the extrusion cavity (43), the rubber one-way port (431) is arranged in the delivery hose (432), and the delivery hose (432) is respectively connected to the coupling agent connecting pipe (335); The cleaning assembly (5) comprises a dust baffle plate (51) and a rolling cleaning brush (52); the dust baffle plate (51) is slidably disposed on one side of the ultrasonic guide groove (32) in an up-and-down manner; a sealing strip (511) is disposed on the upper edge of the dust baffle plate (51); the rolling cleaning brush (52) is rotatably disposed in a transverse array on the upper end of a side wall of the dust baffle plate (51) away from the ultrasonic guide groove (32); a cleaning brush motor (53) is disposed at the end of a rotating shaft of the rolling cleaning brush (52); an output end of the cleaning brush motor (53) is connected to the end of a rotating shaft of the rolling cleaning brush (52); and dust baffle sleeves (53) are symmetrically disposed at the left and right ends of a side of the ultrasonic guide groove (32) close to the dust baffle plate (51). 54), the ash blocking plate (51) is symmetrically provided with ash blocking slide bars (512) at the left and right ends of the side wall close to the ultrasonic guide groove (32), and the ash blocking slide bars (512) are respectively slidably arranged in the ash blocking sleeve (54), and the side wall of the ash blocking slide bar (512) located in the ash blocking sleeve (54) is provided with a first contact piece (5121), and the inner side wall of the ash blocking sleeve (54) is provided with a second contact piece (541), and a return spring (542) is connected between the lower end of the ash blocking slide bar (512) and the inner lower wall of the ash blocking sleeve (54), and when the ash blocking slide bar (512) slides downward, the first contact piece (5121) and the second contact piece (541) are in contact with each other.

2. A multi-angle measuring device for crack depth in a highway bridge and tunnel according to claim 1, Features: A first moving screw rod (11) and a moving slide rod (12) are symmetrically arranged on the upper wall of the moving frame (1) in the front and rear directions; a first screw motor (111) is arranged at the end of the first moving screw rod (11); an output end of the first screw motor (111) is connected to the end of the first moving screw rod (11); a moving groove (13) is arranged on the upper part of the moving frame (1) for sliding left and right; the lower walls at the front and rear ends of the moving groove (13) are respectively sleeved on the side walls of the first moving screw rod (11) and the moving slide rod (12); the first moving screw rod (11) and the moving groove (13) are threadedly connected; the inside of the moving groove (13) is provided with a movable groove (13) for sliding left and right; A second movable screw rod (131) is rotatably provided, a second screw motor (132) is provided at the end of the second movable screw rod (131), an output end of the second screw motor (132) is connected to the end of the second movable screw rod (131), the lower end of the main push rod (2) is sleeved on the side wall of the second movable screw rod (131), the second movable screw rod (131) is threadedly connected to the lower end of the main push rod (2), a handle (14) is provided at the rear end of the movable frame (1), a control panel (15) is provided at the rear end of the movable frame (1), and a main controller (151) is provided below the control panel (15).

3. A multi-angle measuring device for crack depth in a highway bridge and tunnel according to claim 2, Features: The sealing strip (511) is arranged above the upper edge of the sliding ring (333); the extrusion chamber (43) and the telescopic soft tank (421) are made of elastic rubber material; when the first contact piece (5121) contacts the second contact piece (541), the cleaning brush motor (53) drives the rolling cleaning brush (52) to rotate; the adjusting cam (45) is semicircular, and the connecting shaft between the front and rear parts relative to the adjusting cam (45) is arranged at the center of the adjusting cam (45); when the output end of the auxiliary push rod (23) moves upward, the linkage rack (232) drives the linkage gear (451) to rotate, and the pressing arm (44) rotates downward under the drive of the adjusting cam (45), and the extrusion chamber (43) is compressed and deformed; when the output end of the auxiliary push rod (23) touches the lower wall of the supporting plate (31), the arc-shaped edge of the adjusting cam (45) contacts the lower wall of the pressing arm (44).

4. A multi-angle measuring device for crack depth in a highway bridge and tunnel according to claim 3, Features: The first screw motor (111), the second screw motor (132), the control panel (15), the main push rod (2), the first adjustment motor (211), the second adjustment motor (22), the auxiliary push rod (23), the third screw motor (322), the rangefinder (323), the ultrasonic detection transducer (33), the pressure sensor (332), the crack detection camera (34), the first contact piece (5121), the cleaning brush motor (53) and the second contact piece (541) are respectively electrically connected to the main controller (151).

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