A tunnel deformation detection device

Abstract

The application relates to the technical field of tunnel detection, in particular to a tunnel deformation detection device, which comprises a walking vehicle body, an adjusting platform and a detection mechanism, the walking vehicle body and the adjusting platform which is arranged on the top of the walking vehicle body in a position-adjustable mode, the adjusting platform can move horizontally along the direction perpendicular to the driving direction of the walking vehicle body; and the detection mechanism is fixedly arranged on the top of the adjusting platform. The detection mechanism can rotate along the circumferential direction of the inner wall of the tunnel, in the process of rotating and scanning the inner wall of the tunnel, the annular mark cotton soaked with ink is used to draw an annular mark on the inner wall of the tunnel at the deformation position, the deformation position is directly marked on the actual structure of the tunnel, compared with the traditional paper recording mode, monitoring personnel can directly and quickly locate the deformation area, the plane mark does not need to be corresponded with the actual space position, and the problem that the deformation position is difficult to identify is solved.

Description

Technical Field

[0001] This invention relates to the field of tunnel inspection technology, specifically a tunnel deformation detection device. Background Technology

[0002] In the field of transportation infrastructure construction, tunnels, as key structures traversing mountains and urban building complexes, directly affect traffic safety and the safety of personnel and property due to their structural stability. With the continuous expansion of tunnel construction in my country, especially in the southwest region where tunnels with great depth, long length, large cross-sections, and complex geological conditions are increasingly common, tunnels are prone to deformation phenomena such as crown subsidence, sidewall bulging, and cross-sectional convergence during construction and operation due to factors such as high ground stress, adverse geological conditions, and surrounding rock creep. If the deformation location cannot be detected and identified in a timely and accurate manner, it may lead to serious safety accidents such as tunnel lining cracking and collapse. Therefore, tunnel deformation detection is one of the core links in ensuring tunnel engineering safety. Currently, tunnel deformation detection technology has developed to a certain extent, with various detection devices and methods emerging. Among them, the cited document with application number 202311599471.4 discloses a tunnel deformation detection device that can collect and record tunnel deformation data, providing basic support for tunnel deformation monitoring. The detection device disclosed in the cited document typically uses printed paper as a recording medium after completing the collection of tunnel deformation data. The collected deformation-related data is printed on the paper in the form of markings, thereby enabling the preservation and subsequent review of the tunnel deformation situation.

[0003] However, the tunnel deformation detection devices disclosed in the aforementioned cited documents have significant technical shortcomings in practical applications. The core problem lies in the fact that when recording tunnel deformation using printed paper, the markings on the paper only simply reflect deformation-related numerical values ​​or vague trajectories, failing to intuitively and clearly correspond to the actual spatial location of the tunnel. In particular, it is difficult to directly identify the specific location of tunnel depressions using the markings on the printed paper. As a three-dimensional structure, tunnel deformation exhibits spatial distribution characteristics; depressions may appear at different locations such as the arch crown, sidewalls, and arch feet, with varying degrees of depression at different locations. Existing paper-based recording methods only present planar marking information, failing to establish a clear correspondence between the markings and the tunnel's three-dimensional spatial location. Monitoring personnel cannot quickly determine the specific area of ​​the tunnel where the depression occurs based on the markings on the printed paper, nor can they intuitively distinguish the boundary between the depression and the surrounding normal structure. Therefore, we propose a tunnel deformation detection device to solve the aforementioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a tunnel deformation detection device to solve the problem that existing devices cannot directly map deformation marks to the actual location of the tunnel inner wall, resulting in difficulties in identifying deformation locations and quickly locating specific areas of tunnel depressions.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tunnel deformation detection device, comprising: The vehicle body and the adjustable platform located on the top of the vehicle body are adjustable in position, and the adjustable platform can move horizontally along the direction perpendicular to the travel direction of the vehicle body; The detection mechanism is fixedly installed on the top of the adjustment platform. The adjustment platform can move horizontally along the direction perpendicular to the travel direction of the vehicle body to adjust the detection mechanism to the vertical line of the center of the tunnel to be detected. The adjustment platform adjusts the height of the detection mechanism to adjust the detection mechanism to the center of the tunnel to be detected. The detection mechanism rotates circumferentially along the inner wall of the tunnel to be detected to detect whether the tunnel is deformed.

[0006] As a preferred embodiment of the present invention, the traveling vehicle is movably mounted on a track laid inside the tunnel to be inspected, and can travel along the tunnel extension direction. The adjustment platform is a scissor-type hydraulic lift, the bottom of which is slidably connected to the top of the traveling vehicle through a linear rail and driven by a linear motor, so as to realize the horizontal sliding adjustment of the adjustment platform along the direction perpendicular to the traveling vehicle, thereby aligning the detection mechanism above with the vertical line where the center of the tunnel is located.

[0007] As a preferred embodiment of the present invention, the detection mechanism includes a mounting base fixedly disposed on the top of the adjustment platform, and a rotating connecting flange rotatably disposed inside the mounting base, wherein a telescopic main arm is fixedly disposed on the flange connection end of the rotating connecting flange.

[0008] As a preferred embodiment of the present invention, the telescopic boom is composed of multiple rectangular steel pipes that are sequentially nested inside and outside, and two adjacent rectangular steel pipes can slide between each other. A hydraulic cylinder for pushing the multiple rectangular steel pipes to extend and retract is fixedly installed inside the telescopic boom. The cylinder body of the hydraulic cylinder is fixedly connected to the end of the outermost rectangular steel pipe near the rotating connection flange, and the piston rod of the hydraulic cylinder is fixedly connected to the end of the innermost rectangular steel pipe near the rotating connection flange.

[0009] As a preferred embodiment of the present invention, a reduction motor is fixedly installed on the top of the adjustment platform. The reduction motor is located on the side of the mounting base, and the output shaft of the reduction motor is coaxial with the central shaft of the rotating connection flange. The output shaft of the reduction motor and the central shaft of the rotating connection flange are fixedly connected by a coupling.

[0010] In a preferred embodiment of the present invention, a connecting square tube is fixedly installed at the end of the telescopic main arm away from the rotating connecting flange, and a sliding square tube is slidably installed at the end of the connecting square tube away from the telescopic main arm. A roller is rotatably installed inside the sliding square tube, and an annular marking cotton is fixedly installed around the roller. The annular marking cotton has an isosceles triangular cross-section and absorbs ink inside. A servo electric cylinder is fixedly installed inside the connecting square tube, and a push-pull rod is fixedly installed at the end of the piston rod of the servo electric cylinder. A through hole is opened at the end of the sliding square tube near the connecting square tube to accommodate the push-pull rod. The push-pull rod is movably inserted into the through hole. A spring is sleeved around the push-pull rod. One end of the spring is fixedly connected to the outer wall of the push-pull rod near the servo electric cylinder, and the other end of the spring is fixedly connected to the side of the sliding square tube near the connecting square tube. Two measuring instruments are fixedly installed at the end of the sliding square tube away from the connecting square tube, and the two measuring instruments are distributed on both sides of the roller.

[0011] As a preferred embodiment of the present invention, two covers are fixedly provided on both sides of the roller, and a hollow rotating shaft is fixedly provided at the center of the opposite sides of the two covers. A bearing seat is fixedly provided on the outer surface of the sliding square tube, and the hollow rotating shaft is rotatably disposed inside the bearing seat.

[0012] As a preferred embodiment of the present invention, an ink-storing sponge is fixedly disposed inside the roller, the ink-storing sponge contains ink, and a plurality of annularly distributed perforations are opened through the inner wall of the roller along its radial direction. The ink contained inside the ink-storing sponge can be supplied to the annular marking cotton for absorption through the plurality of perforations. A groove is opened on the outer ring surface of the roller, and the annular marking cotton is engaged in the groove.

[0013] As a preferred embodiment of the present invention, two pressure plates are slidably arranged inside the roller along both sides of the ink storage sponge, a top spring is fixedly arranged between the two pressure plates, and a push rod is fixedly arranged at the center of the opposite sides of the two pressure plates. The push rod slides through the hollow rotating shaft, and a through groove for accommodating the top spring is opened in the middle of the ink storage sponge along its axial direction.

[0014] As a preferred embodiment of the present invention, the end of the push rod away from the pressure plate is provided with a universal roller groove, and a ball is rotatably arranged inside the universal roller groove. The two outer surfaces of the sliding square tube near the two bearing seats are integrally provided with lugs, and a pressure rod is rotatably arranged on the lugs. One end of the inner surface of the pressure rod abuts against the outer circular surface of the ball, and the other end of the pressure rod is provided with a rotating groove. A roller is rotatably arranged inside the rotating groove. The two outer surfaces of the connecting square tube near the two rollers are fixedly provided with inclined protrusions, and the outer ring surface of the roller abuts against the outer surface of the inclined protrusions.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by setting up a detection mechanism that can rotate circumferentially along the inner wall of the tunnel, as the detection mechanism rotates and sweeps across the inner wall of the tunnel, annular marking cotton soaked in ink is used to directly draw annular marks on the inner wall of the tunnel's concave deformation location. The deformation location is directly marked on the actual structure of the tunnel. Compared with the traditional paper recording method, this allows monitoring personnel to intuitively and quickly locate the deformation area without having to match the planar marks with the actual spatial position, thus solving the problem of difficulty in identifying the deformation location.

[0016] 2. In this invention, if there are deformation depressions on the inner wall of the tunnel, the annular marking cotton is subjected to the counter-compression effect of the deformation depression, causing the annular marking cotton to undergo elastic deformation under pressure. As the annular marking cotton rolls, the width of the marking line printed on the inner wall of the tunnel depression will become wider. The more severe the depression, the greater the reverse compression force on the annular marking cotton, and the greater the elastic deformation of the annular marking cotton. The marking line printed on the inner wall of the tunnel will be wider. Thus, after the annular marking cotton has traveled along the inner wall of the tunnel, the inspector can know the tunnel deformation by observing the width of the marking line on the inner wall of the tunnel.

[0017] 3. In this invention, when the annular marking cotton is subjected to significant back-compression force from the inner wall of the tunnel depression, it pushes the sliding square tube to slide into the connecting square tube. The connecting square tube also moves the pressure rod along with the lug, causing the roller to roll along the outer surface of the inclined protrusion. This causes the pressure rod to rotate along the connection with the lug, generating a lever effect and squeezing the ball along the push rod axis. This causes both push rods to push towards the center of the ink storage sponge, squeezing the ink storage sponge and accelerating the flow of ink from the ink storage sponge through the perforations to the annular marking cotton. The depression requires more ink to print a wider marking line. Therefore, the more severe the depression, the greater the pressure on the annular marking cotton, the more ink is produced, and the clearer the printed marking. This makes it easier for subsequent inspection personnel to judge the location and degree of deformation, providing greater intuitiveness and making it suitable for rapid on-site inspection in tunnels. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the detection mechanism in this invention; Figure 4 In this invention Figure 3 A schematic diagram of a partial structure; Figure 5 In this invention Figure 4 A schematic diagram of the planar structure; Figure 6 This is a side sectional view of the connecting square tube in this invention; Figure 7 This is a schematic diagram of the servo electric cylinder in this invention; Figure 8 This is a schematic diagram of the sliding square tube in this invention; Figure 9 This is a schematic diagram of the unfolding structure of the roller in this invention. Figure 1 ; Figure 10 This is a schematic diagram of the unfolding structure of the roller in this invention. Figure 2 .

[0019] In the diagram: 100. Walking vehicle body; 101. Adjustment platform; 200. Detection mechanism; 201. Mounting base; 202. Rotary connecting flange; 203. Telescopic main boom; 204. Gear motor; 205. Connecting square tube; 206. Sliding square tube; 207. Roller; 208. Circular marking cotton; 209. Cover; 2010. Hollow rotating shaft; 2011. Bearing seat; 2013. Ink storage sponge; 2014. Press. Plate; 2015, push rod; 2016, through groove; 2017, top spring; 2018, lug; 2019, pressure rod; 2020, rotating groove; 2021, roller; 2022, inclined protrusion; 2023, servo electric cylinder; 2024, push-pull rod; 2025, through hole; 2026, spring; 2027, universal roller groove; 2028, ball; 2071, groove; 2072, seepage hole; 400, measuring instrument. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-10 The technical solution provided by the present invention specifically includes the following embodiments: A tunnel deformation detection device includes a traveling vehicle 100, an adjustment platform 101, and a detection mechanism 200. The traveling vehicle 100 and the adjustment platform 101 are adjustablely mounted on the top of the traveling vehicle 100. The adjustment platform 101 can move horizontally along a direction perpendicular to the travel direction of the traveling vehicle 100. The detection mechanism 200 is fixedly mounted on the top of the adjustment platform 101. The adjustment platform 101 moves horizontally along a direction perpendicular to the travel direction of the traveling vehicle 100 to adjust the detection mechanism 200 to the vertical line of the center of the tunnel to be detected. The adjustment platform 101 also adjusts the height of the detection mechanism 200 to position it at the center of the tunnel to be detected. The detection mechanism 200 rotates circumferentially along the inner wall of the tunnel to detect whether the tunnel is deformed.

[0022] For further details, please refer to [link / reference]. Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 As shown: The traveling vehicle 100 is movably mounted on a track laid inside the tunnel to be inspected, enabling it to travel along the tunnel's extension direction. The adjustment platform 101 is a scissor-type hydraulic lift, its bottom slidably connected to the top of the traveling vehicle 100 via linear rails and driven by a linear motor. This allows the adjustment platform 101 to slide horizontally along a direction perpendicular to the traveling vehicle 100's direction of travel, thereby aligning the detection mechanism 200 above it with the vertical line containing the tunnel's center. The detection mechanism 200 includes a mounting base 201 fixedly mounted on the top of the adjustment platform 101, and a rotating connecting flange 202 rotatably mounted inside the mounting base 201. The flange connection end of the rotating connecting flange 202 is fixed... A telescopic boom 203 is fixedly installed. The telescopic boom 203 is composed of multiple rectangular steel pipes that are sequentially nested inside and outside the boom, and two adjacent rectangular steel pipes can slide against each other. A hydraulic cylinder for pushing the multiple rectangular steel pipes to extend and retract is fixedly installed inside the telescopic boom 203. The cylinder body of the hydraulic cylinder is fixedly connected to the end of the outermost rectangular steel pipe near the rotatable connecting flange 202, and the piston rod of the hydraulic cylinder is fixedly connected to the end of the innermost rectangular steel pipe near the rotatable connecting flange 202. A reduction motor 204 is fixedly installed on the top of the adjustment platform 101. The reduction motor 204 is located on the side of the mounting base 201, and the output shaft of the reduction motor 204 is connected to the rotatable connecting flange 202. The central shaft is coaxial with the central shaft of the telescopic main boom 203. The output shaft of the geared motor 204 is fixedly connected to the central shaft of the rotating connecting flange 202 via a coupling. A connecting square tube 205 is fixedly installed at one end of the telescopic main boom 203 away from the rotating connecting flange 202. A sliding square tube 206 is slidably installed at the other end of the connecting square tube 205 away from the telescopic main boom 203. A roller 207 is rotatably installed inside the sliding square tube 206. An annular marking cotton 208 is fixedly installed around the roller 207. The cross-section of the annular marking cotton 208 is an isosceles triangle shape. The annular marking cotton 208 absorbs ink. A servo electric cylinder 2023 is fixedly installed inside the connecting square tube 205. The piston rod end of the servo electric cylinder 2023... A push-pull rod 2024 is fixedly installed on the part. A through hole 2025 is opened at one end of the sliding square tube 206 near the connecting square tube 205 to accommodate the push-pull rod 2024. The push-pull rod 2024 is movably inserted into the through hole 2025. A spring 2026 is sleeved around the push-pull rod 2024. One end of the spring 2026 is fixedly connected to the outer wall of the push-pull rod 2024 near the servo electric cylinder 2023, and the other end of the spring 2026 is fixedly connected to the side of the sliding square tube 206 near the connecting square tube 205. Two measuring instruments 400 are fixedly installed at the end of the sliding square tube 206 away from the connecting square tube 205. The two measuring instruments 400 are distributed on both sides of the roller 207.In use, based on the inner diameter of the tunnel to be inspected, first, adjust the horizontal sliding adjustment of the platform 101 to align the inspection mechanism 200 with the vertical line where the center of the tunnel is located. Then, adjust the lifting adjustment of the platform 101 to position the entire inspection mechanism 200 at the center of the tunnel. Next, the hydraulic cylinder pushes the telescopic main arm 203 to extend outward, causing the edge of the annular marking cotton 208 to be near the inner wall of the tunnel. Then, the piston rod of the servo electric cylinder 2023 extends, pushing the push-pull rod 2024 to move outward, compressing the spring 2026 and causing the sliding square tube 206 to extend outward as a whole, so that the annular marking... The outer circumference of cotton 208 is gently pressed against the inner wall of the tunnel. Then, the reduction motor 204 drives the rotating connecting flange 202 to rotate as a whole, and the telescopic main arm 203 rotates synchronously, causing the annular marking cotton 208 to roll circumferentially along the inner wall of the tunnel. At this time, the ink impregnated inside the annular marking cotton 208 will leave an annular marking line on the surface of the inner wall of the tunnel. When there is inward deformation and depression in the inner wall of the tunnel, the depression will exert reverse pressure on the annular marking cotton 208, causing elastic deformation. Simultaneously, when this reverse pressure is large, that is, when the tunnel deformation and depression are severe, it will also cause the sliding side... The tube 206 retracts towards the connecting square tube 205, compressing the spring 2026. During this process, the annular marking cotton 208 remains in contact with the tunnel wall. Because the annular marking cotton 208 has an isosceles triangular cross-section, its contact area with the tunnel wall increases after deformation, causing the ink on its surface to print a wider marking line on the tunnel wall. During this process, the measuring instrument 400 moves circumferentially along the tunnel wall along with the annular marking cotton 208, continuously measuring the marking line width and recording the measurement position and width together. Feedback is sent to an external computer for statistical analysis. Subsequent staff can directly determine the location and degree of deformation by observing the markings left on the inner wall of the tunnel. Alternatively, they can obtain the location and degree of tunnel deformation by measuring the data from the measuring instrument 400 and sending it back to the external computer. When the tunnel radius changes, the hydraulic cylinder inside the telescopic boom 203 can be used to extend and retract the rectangular steel pipe, adjusting the overall length of the telescopic boom 203 to adapt to the inspection needs of tunnels with different inner diameters. In conjunction with the traveling vehicle 100 traveling along the tunnel extension direction, continuous deformation detection operations can be completed throughout the entire length of the tunnel.

[0023] For further details, please refer to [link / reference]. Figure 8 , Figure 9 As shown: Two covers 209 are fixedly installed on both sides of the roller 207. A hollow rotating shaft 2010 is fixedly installed at the center of the back of each cover 209. A bearing seat 2011 is fixedly installed on the outer surface of the sliding square tube 206, and the hollow rotating shaft 2010 is rotatably mounted inside the bearing seat 2011. The two hollow rotating shafts 2010 are rotatably installed in the two bearing seats 2011, allowing the roller 207 and the annular marking cotton 208 installed around its periphery to rotate relative to the sliding square tube 206 around the central axis of the hollow rotating shaft 2010. When the annular marking cotton 208 rolls circumferentially along the tunnel wall for detection, it can adaptively conform to the tunnel wall through rotation, ensuring that the annular marking cotton 208 is always in stable contact with the tunnel wall and will not be suspended or jammed, thus ensuring the continuity of the detection marking.

[0024] For further details, please refer to [link / reference]. Figure 10 As shown: An ink-storing sponge 2013 is fixedly installed inside the roller 207, containing ink. Several annularly distributed perforations 2072 are radially distributed on the inner wall of the roller 207. The ink stored in the ink-storing sponge 2013 can be supplied to the annular marking cotton 208 for absorption through the perforations 2072. A groove 2071 is formed on the outer circumferential surface of the roller 207, and the annular marking cotton 208 is snapped into the groove 2071. The ink-storing sponge 2013 continuously supplies ink to the annular marking cotton 208 through the perforations 2072, ensuring that the annular marking cotton 208 always has sufficient ink during circumferential rolling, eliminating the need for frequent ink replenishment and increasing the length of a single inspection operation, thus improving inspection efficiency. Simultaneously, the snap-fit ​​installation of the annular marking cotton 208 within the groove 2071 ensures that the annular marking cotton 208 will not shift along the axial direction of the roller 207, guaranteeing the stability of the annular marking cotton 208's position.

[0025] For further details, please refer to [link / reference]. Figure 8 , Figure 9 , Figure 10 As shown: Inside the roller 207, two pressure plates 2014 are slidably arranged along both sides of the ink storage sponge 2013. A top spring 2017 is fixedly installed between the two pressure plates 2014. A push rod 2015 is fixedly installed at the center of the back side of each of the two pressure plates 2014. The push rod 2015 slides through the hollow rotating shaft 2010. A through groove 2016 for accommodating the top spring 2017 is opened in the middle of the ink storage sponge 2013 along its axial direction. A universal roller groove 2027 is opened at the end of the push rod 2015 away from the pressure plate 2014. A ball is rotatably arranged inside the universal roller groove 2027. 2028, the sliding square tube 206 has lugs 2018 integrally provided on both outer surfaces near the two bearing seats 2011. A pressure rod 2019 is rotatably provided on the lugs 2018. One end of the inner surface of the pressure rod 2019 abuts against the outer circular surface of the ball 2028, and the other end of the pressure rod 2019 is provided with a rotating groove 2020. A roller 2021 is rotatably provided inside the rotating groove 2020. The connecting square tube 205 has oblique protrusions 2022 fixedly provided on both outer surfaces near the two rollers 2021. The outer ring surface of the roller 2021 abuts against the outer surface of the oblique protrusion 2022.

[0026] Specifically, during the sliding of the sliding square tube 206 into the connecting square tube 205, the connecting square tube 205 also moves the pressure rod 2019 along with the lug 2018, causing the roller 2021 to roll along the outer surface of the inclined protrusion 2022. This causes the pressure rod 2019 to rotate at the connection with the lug 2018, generating a lever effect. This exerts axial pressure on the ball 2028 along the push rod 2015, causing both push rods 2015 to push towards the center of the ink storage sponge 2013 simultaneously, thus moving the two pressure plates 2014 towards each other. The compression spring 2017, along with the opposing movement of the two pressure plates 2014, compresses the ink storage sponge 2013, accelerating the flow of ink from the sponge 2013 through the perforations 2072 to the annular marking cotton 208. The dented or deformed area requires more ink to print a wider marking line. Therefore, the more severe the dent, the greater the pressure on the annular marking cotton 208, resulting in more ink output and clearer markings. This makes it easier for subsequent inspectors to determine the location and degree of deformation, providing greater visual clarity and making it suitable for rapid on-site inspection in tunnels.

[0027] The working principle of a tunnel deformation detection device in this solution is as follows: The inspectors first move the entire device to the starting point of the section to be inspected inside the tunnel. Based on the inner diameter of the tunnel, they first adjust the horizontal sliding adjustment of the platform 101 to align the inspection mechanism 200 with the vertical line connecting the tunnel's center. Then, they adjust the lifting adjustment of the platform 101 to position the inspection mechanism 200 at the tunnel's center. Next, the hydraulic cylinder pushes the telescopic main arm 203 outwards, causing the edge of the annular marking cotton 208 to be near the tunnel's inner wall. Then, the piston rod of the servo cylinder 2023 extends, pushing the push-pull rod 2024 to move. Under the connection of the spring 2026, the connecting square tube 205 moves away from the telescopic main arm 203. The connecting square tube 205 moves the annular marking cotton 208, ultimately bringing the outer edge of the annular marking cotton 208 into contact with the inner wall of the tunnel. Then, the drive motor 204 rotates the rotating connecting flange 202, causing the extended telescopic main arm 203 to rotate circumferentially around the tunnel's center, causing the annular marking cotton 208 against the tunnel's inner wall to rotate a full revolution along the tunnel's inner wall. During this rotation... The ink inside the annular marking cotton 208 is printed on the inner wall of the tunnel, forming a ring-shaped marking line. If there is a deformation or depression in the inner wall of the tunnel, the annular marking cotton 208 is subjected to the counter-compression effect of the deformation and depression, causing the annular marking cotton 208 to undergo elastic deformation under pressure. As the annular marking cotton 208 rolls, the width of the marking line printed on the inner wall of the tunnel in the depression will become wider. The more severe the depression, the greater the counter-compression force on the annular marking cotton 208, and the greater the elastic deformation of the annular marking cotton 208, the wider the marking line printed on the inner wall of the tunnel will be. At the same time, during this process, the measuring instrument 400 moves along the circumference of the inner wall of the tunnel together with the annular marking cotton 208. The measuring instrument 400 continuously measures the width of the marking line and feeds back the measurement position and the measured width of the marking line to the external computer for statistics. Subsequently, the staff can directly judge the deformation position and degree of deformation by the marking line left on the inner wall of the tunnel. On the other hand, they can obtain the deformation position and degree of deformation of the tunnel by measuring the data measured by the measuring instrument 400 and feeding it back to the external computer. When the annular marking cotton 208 is subjected to significant counter-pressure from the inner wall of the tunnel recess, it pushes the sliding square tube 206 to slide into the connecting square tube 205. Simultaneously, the spring 2026 is compressed, accumulating elastic potential energy. When the counter-pressure disappears, the compressed spring 2026 releases its elastic force, pushing the sliding square tube 206 back to its original position. This ensures that the annular marking cotton 208 remains in constant contact with the inner wall of the tunnel, guaranteeing a complete and continuous ink imprint. Furthermore, during the sliding of the sliding square tube 206 into the connecting square tube 205, the connecting square tube 205 also moves the pressure rod 2019 along with the lug 2018, causing the roller 2021 to roll along the outer surface of the inclined protrusion 2022. This causes the pressure rod 2019 to rotate along the connection point with the lug 2018, generating… The leverage effect compresses the rolling ball 2028 along the axial direction of the push rod 2015, causing both push rods 2015 to push towards the center of the ink storage sponge 2013 simultaneously. This drives the two pressure plates 2014 to move towards each other, compressing the top spring 2017. At the same time, the movement of the two pressure plates 2014 towards each other compresses the ink storage sponge 2013, accelerating the flow of ink inside the ink storage sponge 2013 through the perforation 2072 to the annular marking cotton 208. More ink is needed at the dented and deformed areas to print wider marking lines. Therefore, the more severe the dent, the greater the compressive force of the annular marking cotton 208, the more ink is produced, and the clearer the printed markings are. This makes it easier for subsequent inspection personnel to judge the location and degree of deformation, providing a more intuitive view and making it suitable for rapid on-site inspection in tunnels. After the test is completed, the piston rod of the servo electric cylinder 2023 retracts, the spring 2026 is released elastically, and the sliding square tube 206 is reset. Then, the telescopic main arm 203 retracts under the action of the hydraulic cylinder, and the traveling vehicle 100 moves along the track to the next position to be tested. The above test operation can be repeated.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A tunnel deformation detection device, comprising: The vehicle body (100), the detection mechanism (200), and the adjustment platform (101) which is adjustablely disposed on the top of the vehicle body (100) are characterized in that: the adjustment platform (101) can move horizontally along the direction perpendicular to the travel direction of the vehicle body (100); The detection mechanism (200) is fixedly installed on the top of the adjustment platform (101). The adjustment platform (101) can move horizontally along the direction perpendicular to the travel direction of the vehicle body (100) to adjust the detection mechanism (200) to the vertical line of the center of the tunnel to be detected. The adjustment platform (101) adjusts the height of the detection mechanism (200) to adjust the detection mechanism (200) to the center of the tunnel to be detected. The detection mechanism (200) rotates circumferentially along the inner wall of the tunnel to be detected to detect whether the tunnel is deformed.

2. The tunnel deformation detection device according to claim 1, characterized in that: The traveling vehicle (100) is movably mounted on a track laid inside the tunnel to be inspected, and can travel along the tunnel extension direction. The adjustment platform (101) is a scissor-type hydraulic lift, the bottom of which is slidably connected to the top of the traveling vehicle (100) via a linear rail and driven by a linear motor, so as to realize the horizontal sliding adjustment of the adjustment platform (101) along the direction perpendicular to the traveling vehicle (100), thereby aligning the detection mechanism (200) above with the vertical line where the center of the tunnel is located.

3. The tunnel deformation detection device according to claim 2, characterized in that: The detection mechanism (200) includes a mounting base (201) fixedly installed on the top of the adjustment platform (101) and a rotating connecting flange (202) rotatably installed inside the mounting base (201). The flange connection end of the rotating connecting flange (202) is fixedly provided with a telescopic main arm (203).

4. The tunnel deformation detection device according to claim 3, characterized in that: The telescopic boom (203) is composed of multiple rectangular steel pipes that are sequentially connected inside and outside, and two adjacent rectangular steel pipes can slide between each other. The telescopic boom (203) is equipped with a hydraulic cylinder for pushing the multiple rectangular steel pipes to extend and retract. The cylinder body of the hydraulic cylinder is fixedly connected to the end of the outermost rectangular steel pipe near the rotating connection flange (202), and the piston rod of the hydraulic cylinder is fixedly connected to the end of the innermost rectangular steel pipe near the rotating connection flange (202).

5. A tunnel deformation detection device according to claim 4, characterized in that: A geared motor (204) is fixedly installed on the top of the adjustment platform (101). The geared motor (204) is located on the side of the mounting base (201), and the output shaft of the geared motor (204) is coaxial with the central shaft of the rotating connection flange (202). The output shaft of the geared motor (204) and the central shaft of the rotating connection flange (202) are fixedly connected by a coupling.

6. The tunnel deformation detection device according to claim 5, characterized in that: A connecting square tube (205) is fixedly installed at one end of the telescopic main arm (203) away from the rotating connecting flange (202). A sliding square tube (206) is slidably installed at the other end of the connecting square tube (205) away from the telescopic main arm (203). A roller (207) is rotatably installed inside the sliding square tube (206). An annular marking cotton (208) is fixedly installed around the roller (207). The annular marking cotton (208) has an isosceles triangular cross-section and absorbs ink inside. A servo electric cylinder (2023) is fixedly installed inside the connecting square tube (205). A push-pull rod (2024) is fixedly installed at the end of the piston rod of the servo electric cylinder (2023). The sliding square tube (206) is rotatably installed at one end of the telescopic main arm (203). 06) A through hole (2025) is provided at one end near the connecting square tube (205) to accommodate the push-pull rod (2024) through which it passes. The push-pull rod (2024) is movably inserted into the through hole (2025). A spring (2026) is sleeved around the push-pull rod (2024). One end of the spring (2026) is fixedly connected to the outer wall of the push-pull rod (2024) near the servo electric cylinder (2023), and the other end of the spring (2026) is fixedly connected to the side of the sliding square tube (206) near the connecting square tube (205). Two measuring instruments (400) are fixedly installed at the end of the sliding square tube (206) away from the connecting square tube (205). The two measuring instruments (400) are distributed on both sides of the roller (207).

7. A tunnel deformation detection device according to claim 6, characterized in that: Both sides of the roller (207) are fixedly provided with a cover (209). There are two covers (209). A hollow rotating shaft (2010) is fixedly provided at the center of the opposite side of the two covers (209). A bearing seat (2011) is fixedly provided on the outer surface of the sliding square tube (206). The hollow rotating shaft (2010) is rotatably provided inside the bearing seat (2011).

8. A tunnel deformation detection device according to claim 7, characterized in that: The roller (207) is fixedly provided with an ink storage sponge (2013), which contains ink. The inner wall of the roller (207) is provided with a number of annularly distributed perforations (2072) along its radial direction. The ink contained in the ink storage sponge (2013) can be supplied to the annular marking cotton (208) for absorption through the perforations (2072). The outer ring surface of the roller (207) is provided with a groove (2071), and the annular marking cotton (208) is engaged in the groove (2071).

9. A tunnel deformation detection device according to claim 8, characterized in that: Inside the roller (207), two pressure plates (2014) are slidably arranged along both sides of the ink storage sponge (2013). A top spring (2017) is fixedly arranged between the two pressure plates (2014). A push rod (2015) is fixedly arranged at the center of the back of the two pressure plates (2014). The push rod (2015) slides through the hollow rotating shaft (2010). A through groove (2016) for accommodating the top spring (2017) is opened in the middle of the ink storage sponge (2013) along its axial direction.

10. A tunnel deformation detection device according to claim 9, characterized in that: The push rod (2015) has a universal roller groove (2027) at one end away from the pressure plate (2014). A ball (2028) is rotatably arranged inside the universal roller groove (2027). The sliding square tube (206) has lugs (2018) integrally provided on both outer surfaces near the two bearing seats (2011). A pressure rod (2019) is rotatably arranged on the lugs (2018). One end of the inner surface of the pressure rod (2019) abuts against the outer circular surface of the ball (2028), and the other end of the pressure rod (2019) has a rotating groove (2020). A roller (2021) is rotatably arranged inside the rotating groove (2020). An inclined protrusion (2022) is fixedly arranged on both outer surfaces near the two rollers (2021) of the connecting square tube (205). The outer ring surface of the roller (2021) abuts against the outer surface of the inclined protrusion (2022).

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