Highway tunnel lining disease detection device and method

Abstract

The application provides a highway tunnel lining disease detection device and method; the highway tunnel lining disease detection device comprises a circular-arc-shaped rack, the bottom of both ends of the rack is provided with a mobile chassis, a detection trolley moving along the circumference of the rack is arranged on the rack, a turnover supporting mechanism and a lens dustproof mechanism are arranged on the detection trolley; the turnover supporting mechanism comprises a turnover frame and a turnover driving hydraulic cylinder for driving the turnover frame to reciprocatingly turn over, a turnover plate is arranged in the inside of the turnover frame, and detection assemblies are arranged on both sides of the turnover plate; the detection assembly comprises an image acquisition component, and a transparent cover body is sleeved outside the image acquisition component; in the application, the detection trolley moves along the circumference of the rack, carries the image acquisition component to scan the lining surface, the circular-arc-shaped rack is provided with the mobile chassis at both ends, so that the detection device can independently travel along the tunnel axis, does not depend on the pre-paved track, and has wide application range.

Description

Technical Field

[0001] This invention belongs to the field of surface defect detection technology for structures, specifically relating to a device and method for detecting defects in the lining of highway tunnels. Background Technology

[0002] The health condition of tunnel lining structures directly affects operational safety, requiring regular inspections to promptly detect defects such as cracks and spalling. Currently, mobile visual inspection devices have become the mainstream method for tunnel lining inspection.

[0003] For example, in the prior art, Chinese invention patent application with publication number CN121740893A discloses a visual inspection device for tunnel lining in high-altitude and cold mountainous areas. Its inspection camera can only move back and forth within a local range limited by the mounting bracket, and cannot travel along the tunnel axis, thus lacking the ability for long-distance continuous inspection.

[0004] For example, Chinese invention patent application CN120490129A discloses a tunnel crack image acquisition and detection device and method. The detection module is carried by a railcar and its movement depends on a dedicated track pre-configured inside the tunnel, which limits its applicability to tunnels without track facilities.

[0005] In addition, the environment is dusty during tunnel inspection operations, and dust easily accumulates on the surface of the transparent cover of the image acquisition component, affecting the clarity of image acquisition and the accuracy of inspection.

[0006] Therefore, there is an urgent need for a tunnel lining defect detection device and method that can autonomously travel along the tunnel axis, does not rely on pre-laid tracks, and can effectively solve the problem of lens dust accumulation. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the present invention provides a highway tunnel lining defect detection device and method that can travel autonomously along the tunnel axis, does not rely on pre-laid tracks, and can effectively solve the problem of lens dust accumulation.

[0008] The technical solution of this invention is: a highway tunnel lining defect detection device, comprising: An arc-shaped frame is provided with movable chassis at both ends of the frame. A detection trolley that moves along the circumference of the frame is provided on the frame. The detection trolley is provided with a flip support mechanism and a lens dustproof mechanism. The flipping support mechanism includes a flipping frame and a flipping drive hydraulic cylinder that drives the flipping frame to flip back and forth. The flipping frame is provided with a flipping plate inside, and detection components are provided on both sides of the flipping plate. The detection component includes an image acquisition unit, and a transparent cover is fitted around the outside of the image acquisition unit; The lens dustproof mechanism includes a blower cylinder, inside which is a piston. A piston rod is fixedly mounted on the piston. The inspection carriage is equipped with a crank-connecting rod transmission mechanism that drives the piston rod to reciprocate. A support arm is hinged to the inspection carriage. A blower pipe is mounted on the free end of the support arm. Blower nozzles are evenly arranged on the blower pipe. A swinging electric cylinder is mounted on the inspection carriage. The swinging electric cylinder drives the support arm to swing up and down so that the blower nozzles correspond to or move away from the surface of the transparent cover that has been flipped to the side away from the inspection carriage. Both ends of the blower cylinder are connected to the air intake pipe via an air intake check valve, and both ends of the blower cylinder are connected to the air outlet pipe via an air outlet check valve. The air outlet pipe is connected to the blower pipe.

[0009] Furthermore, the frame includes an upper arch frame and a lower arch frame that are concentrically and fixedly connected, and an I-beam track and an arched rack are fixedly installed on the upper arch frame; The detection trolley includes a trolley frame, which is slidably connected to the I-beam track. A trolley drive shaft and a trolley drive motor for driving the trolley drive shaft are rotatably mounted on the bottom of the trolley frame. A trolley drive gear that meshes with the arched rack is fixedly mounted on the trolley drive shaft. The crank-connecting rod transmission mechanism includes a drive wheel, on which a connecting rod is eccentrically rotatably mounted. The connecting rod is rotatably connected to the end of the piston rod. A transmission shaft rotatably connected to the trolley frame is fixedly mounted at the bottom of the drive wheel. A driven bevel gear is fixedly mounted at the lower end of the transmission shaft. A driven gear meshing with the arched rack is rotatably mounted at the bottom of the trolley frame. A driving bevel gear meshing with the driven bevel gear is coaxially mounted on the driven gear.

[0010] Furthermore, the inspection trolley is equipped with a lens cleaning mechanism, which corresponds to the surface of the transparent cover that has been flipped to the side closer to the inspection trolley.

[0011] Furthermore, the lens cleaning mechanism includes a cleaning support plate slidably mounted on the inspection trolley, and the inspection trolley is equipped with a translational servo electric cylinder that drives the cleaning support plate to move, so that the cleaning components, scraper and drying components arranged sequentially on the cleaning support plate along its sliding direction can act sequentially on the surface of the transparent cover. The top of the cleaning support plate is fixedly provided with a fixed clamping seat corresponding to the scraper. A detachable clamping seat is detachably fixed on one side of the fixed clamping seat. The detachable clamping seat cooperates with the fixed clamping seat to clamp and fix the scraper.

[0012] Furthermore, the cleaning assembly includes a cleaning nozzle and a cleaning liquid storage bottle fixedly mounted on the cleaning support plate. The cleaning nozzle corresponds to the surface of the transparent cover. The cleaning liquid storage bottle is connected to the cleaning nozzle through a cleaning water pipe, and a cleaning pump is installed on the cleaning water pipe.

[0013] Furthermore, the drying assembly includes a drying air outlet corresponding to the transparent cover, and an air guide hood is provided at the air inlet end of the drying air outlet. The air inlet end of the air guide hood is sequentially connected to a heating module, an air duct module, and a drying filter module.

[0014] Furthermore, two anti-tipping slides are symmetrically arranged on both sides of the top of the frame; The anti-tipping slide includes an anti-tipping bracket with an "A" shaped structure. One end of the anti-tipping bracket is rotatably equipped with a top pulley, and the other end is hinged to the frame. A diagonal hydraulic cylinder is provided between the frame and the anti-tipping support to drive the anti-tipping support to move up and down for adjustment.

[0015] Furthermore, the top of the mobile chassis is connected to the frame via a lifting frame; The lifting frame includes a lower support fixedly mounted on the top of the mobile chassis, an upper support mounted above the lower support, and the top of the upper support fixedly connected to the frame. The bottom of the upper support is evenly provided with lifting guide rods that are slidably connected to the upper end of the lower support, and the lower support is fixedly provided with a lifting hydraulic cylinder that drives the upper support to move up and down.

[0016] Furthermore, a side bracket is fixedly provided on the inner side of the end of the frame, and a side guide rod is provided on one side of the lower bracket, which is slidably disposed inside the side bracket. The two ends of the side guide rod are fixedly connected to the lower bracket through side guide rod support plates.

[0017] A method for detecting defects in highway tunnel lining, using the detection device described in any of the above-mentioned methods, includes the following steps: Move the detection device to the beginning of the area to be detected inside the tunnel; The inspection trolley is started and moves circumferentially along the frame. The image acquisition unit acquires images of the tunnel lining surface through the transparent cover until the inspection trolley moves from one end of the frame to the other, completing the acquisition of one side of the circumferential lining. After completing one circumferential acquisition, the mobile chassis drives the frame to move forward a preset distance along the tunnel axis, the preset distance being no greater than the detection range of the image acquisition component in the tunnel axis direction; The inspection vehicle then performs circumferential data collection again, and this cycle continues until the end of the area to be inspected inside the tunnel is completed.

[0018] The beneficial effects of this invention are: (1) In this invention, the detection trolley moves along the circumference of the frame and carries an image acquisition component to scan the lining surface. The two ends of the arc-shaped frame are equipped with movable chassis, so that the detection device as a whole can move autonomously along the tunnel axis without relying on pre-laid tracks, and has a wide range of applications. (2) The crank-connecting rod transmission mechanism drives the piston rod to drive the piston to reciprocate, continuously generating airflow. The airflow is delivered to the blower pipe through the air outlet pipe and sprayed by the blower nozzle onto the transparent cover surface on the side away from the detection trolley to blow away the dust. (3) The swinging electric cylinder controls the swinging of the support arm so that the blower nozzle is away from the transparent cover before the flipping frame flips, thus avoiding interference; (4) The flipping frame can be flipped back and forth under the drive of the flipping drive hydraulic cylinder, which drives the flipping plate and the detection components on both sides to switch orientations, so that one side can be used for image acquisition while the other side can be cleaned, maintained or kept on standby. Attached Figure Description

[0019] Figure 1 This is one of the structural schematic diagrams of the highway tunnel lining defect detection device of the present invention.

[0020] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0021] Figure 3 This is the second schematic diagram of the structure of the highway tunnel lining defect detection device of the present invention.

[0022] Figure 4 for Figure 3 A magnified view of a section at point B in the middle.

[0023] Figure 5 This is one of the structural schematic diagrams of the detection vehicle in this invention.

[0024] Figure 6 for Figure 5 A magnified view of a section at point C.

[0025] Figure 7 This is the second schematic diagram of the detection vehicle in this invention.

[0026] Figure 8 This is one of the structural schematic diagrams of the lens cleaning mechanism in this invention.

[0027] Figure 9 This is the second schematic diagram of the lens cleaning mechanism in this invention.

[0028] Figure 10 This is one of the structural schematic diagrams of the lens dust prevention mechanism in this invention.

[0029] Figure 11 This is the second schematic diagram of the lens dust prevention mechanism in this invention.

[0030] Figure 12 This is a schematic diagram of the anti-tipping slide in this invention. Detailed Implementation

[0031] Various exemplary embodiments of the invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the invention or its application or use. The invention can be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the invention thorough and complete, and to fully express the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0032] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, without excluding the possibility of encompassing other elements. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] like Figures 1 to 12As shown, a highway tunnel lining defect detection device is disclosed, comprising: an arc-shaped frame 1, with movable chassis 2 at both ends of the frame 1; a detection trolley 3 that moves circumferentially on the frame 1; a tilting support mechanism 6 and a lens dustproof mechanism 8 on the detection trolley 3; the tilting support mechanism 6 includes a tilting frame 61 and a tilting drive hydraulic cylinder 63 that drives the tilting frame 61 to tilt back and forth 180°; a tilting plate 64 is provided inside the tilting frame 61; detection components 9 are provided on both sides of the tilting plate 64; the detection components 9 include an image acquisition component, with a transparent cover 91 fitted over the outside of the image acquisition component (the image acquisition component is covered inside the transparent cover 91, not shown in the figure); the lens dustproof mechanism 8 includes a blower cylinder 84, with a piston provided inside the blower cylinder 84 (the piston is located inside the blower cylinder 84, not shown), and a movable... The piston rod 85 is mounted on the detection carriage 3, and a crank-connecting rod transmission mechanism 89 is provided to drive the piston rod 85 to reciprocate. A support arm 82 is hinged on the detection carriage 3, and a blower pipe 81 is provided at the free end of the support arm 82. Blower nozzles 811 are evenly arranged on the blower pipe 81. A swing cylinder 83 is provided on the detection carriage 3. One end of the swing cylinder 83 is hinged to the carriage frame 31, and the other end is hinged to the support arm 82. The swing cylinder 83 drives the support arm 82 to swing up and down so that the blower nozzles 811 swing between the blowing position corresponding to the surface of the transparent cover 91 flipped to the side away from the detection carriage 3 and the avoidance position away from the surface of the transparent cover 91. Both ends of the blower cylinder body 84 are connected to the air inlet pipe 87 through the air inlet one-way valve 871, and both ends of the blower cylinder body 84 are connected to the air outlet pipe 86 through the air outlet one-way valve 861. The air outlet pipe 86 is connected to the blower pipe 81.

[0034] The detection trolley 3 moves circumferentially along the frame 1, carrying image acquisition components to scan the lining surface. The arc-shaped frame 1 has movable chassis 2 at both ends, allowing the detection device to move autonomously along the tunnel axis without relying on pre-laid tracks, making it widely applicable. The crank-connecting rod transmission mechanism 89 drives the piston rod 85 to reciprocate, continuously generating airflow. The airflow is delivered to the blowing pipe 81 through the air outlet pipe 86, and sprayed by the blowing nozzle 811 onto the surface of the transparent cover 91 on the side away from the detection trolley, blowing away dust. The swing electric cylinder 83 controls the swing of the support arm 82, so that the blowing nozzle 811 moves away from the transparent cover 91 before the flip frame 61 flips, avoiding interference. The flip frame 61 can reciprocate under the drive of the flip drive hydraulic cylinder 63, driving the flip plate 64 and the detection components 9 on both sides to switch orientations, so that while one side is acquiring images, the other side can be cleaned, maintained, or kept on standby.

[0035] In some embodiments, an air intake filter 88 is provided at the air intake end of the air intake pipe 87. The air intake filter 88 is used to filter dust and other impurities in the air. Two flipping bearing seats 62 are symmetrically arranged on the top of the detection trolley 3. The flipping frame 61 is rotatably arranged between the two flipping bearing seats 62. The flipping drive hydraulic cylinder 63 is a 180° rotating indexing hydraulic cylinder. Its cylinder body is fixed on a flipping bearing seat 62. Its rotation output shaft is directly fixedly connected to the rotating shaft of the flipping frame 61 or connected through a coupling.

[0036] In some embodiments, such as Figure 1 As shown, the frame 1 includes an upper arch frame 12 and a lower arch frame 11 that are concentrically and fixedly connected. The upper arch frame 12 and the lower arch frame 11 are fixedly connected to each other by welding profiles to form an integral structure. An I-beam rail 13 and an arched rack 14 are fixedly installed on the upper arch frame 12; as shown Figures 5 to 7 As shown, the inspection trolley 3 includes a trolley frame 31, which is slidably connected to the I-beam track 13. A trolley drive shaft 36 and a trolley drive motor 35 are rotatably mounted on the bottom of the trolley frame 31. A trolley drive gear 37, which meshes with an arched rack 14, is fixedly mounted on the trolley drive shaft 36. The trolley drive motor 35 drives the trolley drive gear 37 to rotate, and the meshing of the trolley drive gear 37 with the arched rack 14 enables the inspection trolley 3 to travel circumferentially along the frame 1. Figure 10 and 11 As shown, the crank-connecting rod transmission mechanism 89 includes a drive wheel 891, a connecting rod 892 eccentrically rotatably mounted on the drive wheel 891, the connecting rod 892 being rotatably connected to the end of the piston rod 85, a transmission shaft 893 rotatably connected to the trolley frame 31 being fixedly mounted at the bottom of the drive wheel 891, a driven bevel gear 894 being fixedly mounted at the lower end of the transmission shaft 893, a driven gear 896 meshing with the arched rack 14 being rotatably mounted at the bottom of the trolley frame 31, and a driving bevel gear 895 meshing with the driven bevel gear 894 being coaxially mounted on the driven gear 896.

[0037] The inspection carriage 3 moves circumferentially along the frame 1 via the meshing of the carriage drive gear 37 and the arched rack 14. Simultaneously, the driven gear 896 also meshes with the arched rack 14 and is driven to rotate as the inspection carriage 3 moves. Power is transmitted to the transmission shaft 893 via the driving bevel gear 895 and the driven bevel gear 894, causing the drive wheel 891 to rotate. The eccentrically mounted connecting rod 892 on the drive wheel 891 converts the rotational motion into the reciprocating linear motion of the piston rod 85, driving the piston in the blower cylinder 84 to reciprocate and generate airflow. This achieves mechanical linkage between the movement of the inspection carriage 3 and lens dust prevention, eliminating the need for a separate power source for the lens dust prevention mechanism 8. The intensity of the blowing airflow changes synchronously with the movement speed of the inspection carriage 3; the faster the movement, the stronger the airflow, and the dust prevention effect automatically matches the inspection speed.

[0038] Specifically, the trolley frame 31 is symmetrically provided with side plates 32 on both sides. The side plates 32 are rotatably provided with an upper pulley 33 and a lower pulley 34. The upper pulley 33 slides on the top of the side of the upper flange of the I-beam track 13, and the lower pulley 34 slides on the bottom of the side of the upper flange of the I-beam track 13.

[0039] Although a lens dust prevention mechanism 8 is provided to reduce the real-time accumulation of dust on the surface of the transparent cover 91, as the inspection time increases, dust, mud, or other contaminants that have not been blown away may still adhere to the surface of the transparent cover 91, thus affecting the image acquisition quality. Therefore, the inspection carriage 3 is also equipped with a lens cleaning mechanism 7 for further cleaning of the surface of the transparent cover 91.

[0040] In some embodiments, such as Figure 2 As shown, the inspection carriage 3 is equipped with a lens cleaning mechanism 7, which corresponds to the surface of the transparent cover 91 that is flipped to the side closer to the inspection carriage 3. Inspection components 9 are provided on both sides of the flip plate 64. When one side of the transparent cover 91 is flipped to the side away from the inspection carriage 3 for image acquisition, the other side of the transparent cover 91 is flipped to the side closer to the inspection carriage 3. The lens cleaning mechanism 7 is located on the inspection carriage 3, and its working position corresponds to the surface of the transparent cover 91 closest to the inspection carriage 3. It can clean the surface of the transparent cover 91 when the inspection component 9 is not in operation, and the cleaning process does not affect the image acquisition operation of the other side of the inspection component 9.

[0041] In some embodiments, such as Figure 8 and 9As shown, the lens cleaning mechanism 7 includes a cleaning support plate 71 slidably mounted on the inspection carriage 3. The inspection carriage 3 is equipped with a translational servo cylinder 77 that drives the cleaning support plate 71 to move, so that the cleaning assembly 72, scraper 73, and drying assembly 76, sequentially arranged on the cleaning support plate 71 along its sliding direction, can sequentially act on the surface of the transparent cover 91. The translational servo cylinder 77 drives the cleaning support plate 71 to move between five positions. The initial position is the first position, at which point the lens cleaning mechanism 7 does not affect the flipping support mechanism 6. The second position is when the cleaning assembly 72 corresponds to the surface of the transparent cover 91. Upon reaching this position, the cleaning assembly 72 moves towards the transparent cover 91. Cleaning water is sprayed onto the surface of the transparent cover 91; the third position is when the scraper 73 just touches the transparent cover 91; the fourth position is when the scraper 73 removes the residual water from the surface of the transparent cover 91 and just leaves the transparent cover 91. Usually, the translational servo cylinder 77 drives the cleaning support plate 71 to move back and forth between the third and fourth positions at least once before entering the next position; the fifth position is when the drying component 76 corresponds to the surface of the transparent cover 91. When this position is reached, the drying component 76 blows hot air onto the surface of the transparent cover 91 for drying; after drying continues for a period of time, the translational servo cylinder 77 drives the cleaning support plate 71 to return to the first position, completing a complete cleaning process.

[0042] Specifically, a fixed clamping seat 74 corresponding to the scraper 73 is fixedly installed on the top of the cleaning support plate 71. A detachable clamping seat 75 is detachably fixed on one side of the fixed clamping seat 74. The detachable clamping seat 75 cooperates with the fixed clamping seat 74 to clamp and fix the scraper 73. The scraper 73 adopts a detachable clamping and fixing structure for easy replacement and maintenance. As an example, the two ends of the detachable clamping seat 75 and the fixed clamping seat 74 are detachably assembled and fixed by bolts and nuts. The scraper 73 is a silicone scraper or a polyurethane scraper.

[0043] Specifically, such as Figure 7 As shown, slide rods 78 are mounted on both sides of the bottom of the trolley frame 31 via slide rod supports 781. Both ends of the cleaning support plate 71 are provided with sliding channels that match the slide rods 78. The two ends of the cleaning support plate 71 are slidably fitted onto the outside of the two slide rods 78, thereby realizing the sliding connection between the cleaning support plate 71 and the inspection trolley 3.

[0044] In some embodiments, the cleaning assembly 72 includes a cleaning nozzle 721 and a cleaning liquid storage bottle 724 fixedly mounted on the cleaning support plate 71. The cleaning nozzle 721 corresponds to the surface of the transparent cover 91. The cleaning liquid storage bottle 724 is connected to the cleaning nozzle 721 via a cleaning water pipe 722, and a cleaning pump 723 is installed on the cleaning water pipe 722. The cleaning liquid storage bottle 724 stores cleaning water. After the cleaning pump 723 is started, it delivers the cleaning water to the cleaning nozzle 721 through the cleaning water pipe. The cleaning nozzle 721 sprays the cleaning water onto the surface of the transparent cover 91, wetting and softening the surface stains, providing a liquid medium for subsequent stain removal, and improving the cleaning effect.

[0045] In some embodiments, the drying assembly 76 includes a drying air outlet 761 corresponding to the transparent cover 91. An air guide 762 is provided at the air inlet end of the drying air outlet 761. A heating module 765, an air intake module 764, and a drying filter module 763 are sequentially connected to the air inlet end of the air guide 762. Outside air first passes through the drying filter module 763 to remove moisture and impurities, and is then introduced by the air intake module 764. After being heated by the heating module 765, it forms dry hot air. The hot air is guided by the air guide 762 to the drying air outlet 761 and blown onto the surface of the transparent cover 91 for rapid drying.

[0046] Specifically, the heating module 765 includes a heating housing, inside which is installed a heating wire or a PTC heating element. The air outlet of the heating housing is connected to the air inlet of the air guide shroud. The air intake module 764 is a miniature axial flow fan. The air inlet of the miniature axial flow fan is connected to the air outlet of the drying and filtering module 763, and the air outlet of the miniature axial flow fan is connected to the air inlet of the heating module 765. The drying and filtering module 763 includes a filter box, inside which is filled with desiccant. A dust filter screen is installed at the air inlet of the filter box. Outside air is first filtered by the drying and filtering module 763 to remove dust and moisture, and then sent to the heating module 765 for heating by the air intake module 764. Finally, the hot air is guided by the air guide shroud to the drying air outlet and blown onto the surface of the transparent cover.

[0047] In some embodiments, such as Figure 1 As shown, two anti-tipping slides 4 are symmetrically arranged on both sides of the top of the frame 1; as Figure 12 As shown, the anti-tipping slide includes an "A"-shaped anti-tipping bracket 41. One end of the anti-tipping bracket is rotatably equipped with a top pulley 43, and the other end is hinged to the frame 1. A diagonal hydraulic cylinder 42 is installed between the frame 1 and the anti-tipping bracket 41 to drive the anti-tipping bracket 41 to move up and down for adjustment. The diagonal hydraulic cylinder 42 drives the anti-tipping bracket 41 to swing up and down for adjustment, so that the top pulley 43 abuts against the top of the tunnel lining, forming a support limit, enhancing the stability of the detection device when operating in the tunnel, and preventing it from tipping over.

[0048] In some embodiments, such as Figure 1, 3 As shown in Figure 4, the top of the mobile chassis 2 is connected to the frame 1 via a lifting frame 5. The lifting frame 5 includes a lower support 52 fixedly mounted on the top of the mobile chassis 2, an upper support 51 mounted above the lower support 52, and the top of the upper support 51 fixedly connected to the frame 1. Lifting guide rods 53, which are slidably connected to the upper end of the lower support 52, are evenly distributed at the bottom of the upper support 51. A lifting hydraulic cylinder 54, which drives the upper support 51 to move up and down, is fixedly mounted inside the lower support 52. The piston rod of the lifting hydraulic cylinder 54 drives the upper support 51 to move up and down along the lifting guide rods 53. The top of the upper support 51 is fixedly connected to the frame 1, thereby achieving the overall height adjustment of the frame 1. This allows the height of the frame 1 to be adjusted according to the height of the tunnel lining or the requirements of the detection position, adapting to tunnels with different cross-sectional dimensions and improving the adaptability and detection coverage of the device.

[0049] In some embodiments, a side support 55 is fixedly provided on the inner side of the end of the frame 1, and a side guide rod 56 is provided on one side of the lower support 52, which is slidably disposed inside the side support 55. The two ends of the side guide rod 56 are fixedly connected to the lower support 52 through side guide rod support plates 57. When the lifting hydraulic cylinder 54 drives the frame 1 to rise or fall, the side guide rod 56 slides inside the side support 55, and the side guide rod support plate 57 fixes the two ends of the side guide rod 56 to the lower support 52, forming lateral constraint and guidance. Lateral guidance and stabilization are provided during the lifting and falling of the frame 1 to prevent the frame 1 from deviating or swaying during lifting and falling, and to ensure the smoothness and accuracy of the lifting and falling movement.

[0050] In some embodiments, the mobile chassis 2 is a tracked chassis; the image acquisition component is an industrial camera, and the lens end face of the industrial camera is sealed to the inner wall of the transparent cover 91 or has a small gap; supplementary lights 92 are symmetrically arranged on both sides of the flip plate 64.

[0051] In some embodiments, a method for detecting defects in highway tunnel lining is disclosed, employing the detection device as described in any of the above embodiments, and including the following steps: Move the detection device to the beginning of the area to be detected inside the tunnel; The detection trolley 3 is started and moves circumferentially along the frame 1. The image acquisition component acquires images of the tunnel lining surface through the transparent cover 91 until the detection trolley 3 moves from one end of the frame 1 to the other end, completing the acquisition of one side of the circumferential lining. After completing one circumferential acquisition, the mobile chassis 2 drives the frame 1 to move forward a preset distance along the tunnel axis. The preset distance is not greater than the detection range of the image acquisition component in the tunnel axis direction. The inspection vehicle 3 performs circumferential data collection again, and this cycle continues until the end of the area to be inspected inside the tunnel is completed.

[0052] After the detection device moves to the starting end, the detection trolley 3 moves circumferentially back and forth along the arc-shaped frame 1, while the image acquisition unit continuously scans and acquires data on one side of the lining. After completing one circumferential acquisition, the moving chassis 2 drives the frame 1 forward a preset distance along the tunnel axis. This distance is no greater than the detection range of the image acquisition unit, ensuring that adjacent acquisition areas overlap or connect. The detection trolley 3 then performs another circumferential acquisition, and this cycle continues until the entire area to be inspected is covered. This achieves efficient, full-coverage, continuous detection of the tunnel lining. The continuous circumferential scanning of the detection trolley 3 and the step-by-step forward movement of the moving chassis 2 alternate, ensuring comprehensive coverage.

[0053] The various embodiments of the present invention have now been described in detail. To avoid obscuring the concept of the invention, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0054] The embodiments described above only illustrate some implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A device for detecting defects in highway tunnel lining, characterized in that, include: An arc-shaped frame is provided with movable chassis at both ends of the frame. A detection trolley that moves along the circumference of the frame is provided on the frame. The detection trolley is provided with a flip support mechanism and a lens dustproof mechanism. The flipping support mechanism includes a flipping frame and a flipping drive hydraulic cylinder that drives the flipping frame to flip back and forth. The flipping frame is provided with a flipping plate inside, and detection components are provided on both sides of the flipping plate. The detection component includes an image acquisition unit, and a transparent cover is fitted around the outside of the image acquisition unit; The lens dustproof mechanism includes a blower cylinder, inside which is a piston. A piston rod is fixedly mounted on the piston. The inspection carriage is equipped with a crank-connecting rod transmission mechanism that drives the piston rod to reciprocate. A support arm is hinged to the inspection carriage. A blower pipe is mounted on the free end of the support arm. Blower nozzles are evenly arranged on the blower pipe. A swinging electric cylinder is mounted on the inspection carriage. The swinging electric cylinder drives the support arm to swing up and down so that the blower nozzles correspond to or move away from the surface of the transparent cover that has been flipped to the side away from the inspection carriage. Both ends of the blower cylinder are connected to the air intake pipe via an air intake check valve, and both ends of the blower cylinder are connected to the air outlet pipe via an air outlet check valve. The air outlet pipe is connected to the blower pipe.

2. The highway tunnel lining defect detection device according to claim 1, characterized in that: The frame includes an upper arch frame and a lower arch frame that are concentrically and fixedly connected. An I-beam track and an arched rack are fixedly installed on the upper arch frame. The detection trolley includes a trolley frame, which is slidably connected to the I-beam track. A trolley drive shaft and a trolley drive motor for driving the trolley drive shaft are rotatably mounted on the bottom of the trolley frame. A trolley drive gear that meshes with the arched rack is fixedly mounted on the trolley drive shaft. The crank-connecting rod transmission mechanism includes a drive wheel, on which a connecting rod is eccentrically rotatably mounted. The connecting rod is rotatably connected to the end of the piston rod. A transmission shaft rotatably connected to the trolley frame is fixedly mounted at the bottom of the drive wheel. A driven bevel gear is fixedly mounted at the lower end of the transmission shaft. A driven gear meshing with the arched rack is rotatably mounted at the bottom of the trolley frame. A driving bevel gear meshing with the driven bevel gear is coaxially mounted on the driven gear.

3. The highway tunnel lining defect detection device according to claim 1, characterized in that: The inspection trolley is equipped with a lens cleaning mechanism, which corresponds to the surface of the transparent cover that has been flipped to the side closer to the inspection trolley.

4. The highway tunnel lining defect detection device according to claim 3, characterized in that: The lens cleaning mechanism includes a cleaning support plate slidably mounted on the inspection trolley. The inspection trolley is equipped with a translation servo electric cylinder that drives the cleaning support plate to move, so that the cleaning components, scraper and drying components arranged sequentially on the cleaning support plate along its sliding direction can act sequentially on the surface of the transparent cover. The top of the cleaning support plate is fixedly provided with a fixed clamping seat corresponding to the scraper. A detachable clamping seat is detachably fixed on one side of the fixed clamping seat. The detachable clamping seat cooperates with the fixed clamping seat to clamp and fix the scraper.

5. The highway tunnel lining defect detection device according to claim 4, characterized in that: The cleaning assembly includes a cleaning nozzle and a cleaning liquid storage bottle fixedly mounted on the cleaning support plate. The cleaning nozzle corresponds to the surface of the transparent cover. The cleaning liquid storage bottle is connected to the cleaning nozzle through a cleaning water pipe, and a cleaning pump is installed on the cleaning water pipe.

6. The highway tunnel lining defect detection device according to claim 4, characterized in that: The drying assembly includes a drying air outlet corresponding to the transparent cover. The air inlet of the drying air outlet is provided with an air guide hood, and the air inlet of the air guide hood is sequentially connected to a heating module, an air duct module, and a drying filter module.

7. The highway tunnel lining defect detection device according to claim 1, characterized in that: Two anti-tipping slides are symmetrically arranged on both sides of the top of the frame; The anti-tipping slide includes an anti-tipping bracket with an "A" shaped structure. One end of the anti-tipping bracket is rotatably equipped with a top pulley, and the other end is hinged to the frame. A diagonal hydraulic cylinder is provided between the frame and the anti-tipping support to drive the anti-tipping support to move up and down for adjustment.

8. The highway tunnel lining defect detection device according to claim 1, characterized in that: The top of the mobile chassis is connected to the frame via a lifting frame; The lifting frame includes a lower support fixedly mounted on the top of the mobile chassis, an upper support mounted above the lower support, and the top of the upper support fixedly connected to the frame. The bottom of the upper support is evenly provided with lifting guide rods that are slidably connected to the upper end of the lower support, and the lower support is fixedly provided with a lifting hydraulic cylinder that drives the upper support to move up and down.

9. The highway tunnel lining defect detection device according to claim 8, characterized in that: A side bracket is fixedly installed on the inner side of the end of the frame, and a side guide rod is slidably installed inside the side bracket on one side of the lower bracket. The two ends of the side guide rod are fixedly connected to the lower bracket through side guide rod support plates.

10. A method for detecting defects in highway tunnel lining, employing the detection device as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Move the detection device to the beginning of the area to be detected inside the tunnel; The inspection trolley is started and moves circumferentially along the frame. The image acquisition unit acquires images of the tunnel lining surface through the transparent cover until the inspection trolley moves from one end of the frame to the other, completing the acquisition of one side of the circumferential lining. After completing one circumferential acquisition, the mobile chassis drives the frame to move forward a preset distance along the tunnel axis, the preset distance being no greater than the detection range of the image acquisition component in the tunnel axis direction; The inspection vehicle then performs circumferential data collection again, and this cycle continues until the end of the area to be inspected inside the tunnel is completed.

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