Tunnel structure detection equipment

Abstract

The utility model relates to the technical field of tunnel detection, and discloses tunnel structure detection equipment which comprises a primary rod, the inner wall of the primary rod is connected with a secondary rod in a sliding mode, the outer wall of the secondary rod is fixedly connected with fixing pieces, a pulley is rotatably connected between every two adjacent fixing pieces through a central column, and the central column is fixedly connected with the secondary rod. A transmission rope is rotationally connected between every two adjacent pulleys, a first locking block is fixedly connected to the right side of the transmission rope, the outer wall of the first locking block is fixedly connected with the inner wall of the first-stage rod, a second locking block is fixedly connected to the left side of the transmission rope, and a third-stage rod is fixedly connected to the outer wall of the second locking block; and the outer wall of the central column is fixedly connected with a worm gear. According to the utility model, the worm and the worm gear are meshed to rotate the central column, the pulley and the transmission rope are driven, the transmission rope is connected with the third-stage rod and the first-stage rod, so that the third-stage rod slides on the inner wall of the second-stage rod, the first-stage rod slides downwards, the first-stage rod is fixed to enable the detection mechanism to rise, and high-altitude measurement is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of tunnel inspection technology, and in particular to a tunnel structure inspection device. Background Technology

[0002] Tunnel structural inspection is a crucial step in ensuring the safe operation of tunnels. Its purpose is to assess the health of the tunnel structure, promptly identify potential defects and safety hazards, and provide a scientific basis for tunnel maintenance, repair, and renovation. The inspection covers several key aspects, including lining structure inspection, checking for cracks, spalling, and water leakage to determine its load-bearing capacity and durability. Existing tunnel inspection technologies mainly include visual inspection and instrumental testing. While these methods can meet inspection needs to some extent, they still have significant limitations in terms of accuracy, efficiency, and safety. With technological advancements, various new inspection technologies and equipment are constantly emerging, greatly improving the reliability and efficiency of inspection work.

[0003] A search revealed Chinese Patent Publication No. CN205280121U, which discloses a device for detecting the quality of tunnel lining, belonging to the technical field of tunnel inspection equipment. This utility model's device for detecting the quality of tunnel lining consists of a sleeve placed on a moving platform, a support rod connected to one end of the sleeve by a spring, a ball head placed at the top of the support rod, a detection equipment bracket connected to the ball head, and a balance spring for balancing the detection equipment bracket. The advantages of this utility model are its simple structure, labor saving, easy maintenance, practicality, high safety performance, and good data acquisition quality, meeting the requirements for tunnel lining inspection under various road conditions. However, the above structure does not consider the limited length of the bracket, requiring additional equipment for inspection at higher locations in the tunnel, making rapid operation inconvenient. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a tunnel structure inspection device, which aims to improve the problem that the existing technology has limited bracket length, requires additional equipment to assist in the inspection of high places in tunnels, and is not convenient for rapid operation.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a tunnel structure inspection device, comprising a primary rod, a secondary rod slidably connected to the inner wall of the primary rod, a fixing member fixedly connected to the outer wall of the secondary rod, a pulley rotatably connected between adjacent fixing members via a central column, a transmission cable rotatably connected between adjacent pulleys, a locking block one fixedly connected to the right side of the transmission cable, the outer wall of the locking block one fixedly connected to the inner wall of the primary rod, a locking block two fixedly connected to the left side of the transmission cable, a tertiary rod fixedly connected to the outer wall of the locking block two, a worm gear fixedly connected to the outer wall of the central column, a worm engaging with the outer wall of the worm gear, and a detection mechanism provided on the outer wall of the tertiary rod, the detection mechanism being used to detect the quality of the tunnel lining.

[0006] Through the above technical solution: the precise sliding connection between the first-level rod and the second-level rod ensures that the second-level rod can move smoothly and flexibly within the first-level rod. A fixing component is fixedly connected to the outer wall of the second-level rod. A pulley is rotatably connected between two adjacent fixing components via a central column, ensuring efficient transmission. A transmission cable is rotatably connected between two adjacent pulleys, maintaining stable performance during long-term use. A locking block one is fixedly connected to the right side of the transmission cable, firmly fixed to the inner wall of the first-level rod, ensuring no loosening during equipment operation. A locking block two is fixedly connected to the left side of the transmission cable, and a third-level rod is fixedly connected to the outer wall of the locking block two. When the transmission cable moves under the drive of the pulley, the position change of the third-level rod can be precisely controlled. A worm gear is fixedly connected to the outer wall of the central column. The meshing of the worm gear and the worm allows easy control of the worm gear's rotation by rotating the worm, thereby achieving precise control of the pulley and the transmission cable.

[0007] As a further description of the above technical solution:

[0008] The detection mechanism includes a fixed block, the outer wall of which is fixedly connected to the top of the outer wall of the three-stage rod. A mounting platform is rotatably connected to the outer wall of the fixed block. Multiple wheels are provided on the outer wall of the mounting platform. A slide rail is fixedly connected to the outer wall of the mounting platform. A slider is slidably connected to the inner wall of the slide rail. A second triangular block is fixedly connected between two adjacent sliders. A first triangular block is slidably connected to the outer wall of the mounting platform. A cable is fixedly connected to the top surface of the first triangular block. The other end of the cable is wound around the outer wall of a spool. The outer wall of the spool is fixedly connected to the outer wall of the first-stage rod.

[0009] Through the above technical solution: the fixed block is fixedly connected to the outer wall of the three-stage rod, forming a whole between the fixed block and the three-stage rod, which can effectively withstand forces from all directions. The outer wall of the fixed block is rotatably connected to the mounting platform, allowing the mounting platform to rotate flexibly and smoothly around the fixed block. The mounting platform can adjust its angle according to actual working needs, thereby better adapting to different testing scenarios and working requirements. The outer wall of the mounting platform is connected to multiple wheels, which can roll smoothly on different surfaces. The outer wall of the mounting platform is fixedly connected to a slide rail, and a slider is slidably connected to the inner wall of the slide rail, ensuring that the slider slides smoothly and without jamming within the slide rail. A second triangular block is fixedly connected between two adjacent sliders. The second triangular block is triangular and plays an important role in transmitting force and maintaining structural stability. The outer wall of the mounting platform is slidably connected to a first triangular block, and a cable is fixedly connected to the top surface of the first triangular block. The other end of the cable is wound around the outer wall of the spool. The outer wall of the spool is fixedly connected to the outer wall of the first-stage rod. The surface of the spool has special grooves to ensure that the cable will not slip or fall off during the winding process. When the reel rotates, the cable will extend and retract accordingly, causing the triangular block to slide on the outer wall of the reel, thereby pushing the detector to fit tightly against the tunnel wall, allowing the detector to perform measurements in close contact.

[0010] As a further description of the above technical solution:

[0011] A sphere is fixedly connected to the bottom surface of the first-stage rod, and a grounding foot is rotatably connected to the outer wall of the sphere.

[0012] The above technical solution involves a smooth sphere fixedly connected to the bottom of the first-stage rod, with the outer wall of the sphere rotatably connected to the grounding foot, allowing the grounding foot to rotate flexibly around the sphere.

[0013] As a further description of the above technical solution:

[0014] The bottom surface of the grounding foot is fixedly connected with anti-slip nails, and the outer wall of the first-stage rod is fixedly connected with a protective shell.

[0015] The above technical solution involves: anti-slip nails fixedly connected to the bottom of the grounding foot, which can effectively increase the friction with the ground and ensure the stability of the entire device when placed; and a protective shell fixedly connected to the outer wall of the first-stage rod.

[0016] As a further description of the above technical solution:

[0017] The top of the third-stage rod is fixedly connected to a guide wheel, and the outer wall of the first-stage rod is fixedly connected to a reinforcing strip.

[0018] Through the above technical solution: a guide wheel is fixedly connected to the top of the third-stage rod. The wheel surface of the guide wheel is made of high-elasticity rubber material, which has good flexibility and wear resistance. It can reduce frictional resistance when guiding the relevant components to run, and ensure smooth and stable operation. Several reinforcing strips are evenly distributed and fixedly connected to the outer wall of the first-stage rod, which greatly enhances the structural strength of the first-stage rod, making it able to withstand greater external forces without easily deforming.

[0019] As a further description of the above technical solution:

[0020] One end of the worm gear is fixedly connected to a crank handle, and a sleeve is rotatably connected to the outer wall of the crank handle.

[0021] The above technical solution involves a crank handle fixedly connected to one end of the worm gear. The outer wall of the crank handle and the sleeve are connected by a clearance fit, which allows the sleeve to maintain a relatively stable position when the crank handle is rotated, without hindering the flexible rotation of the crank handle.

[0022] As a further description of the above technical solution:

[0023] A detector is fixedly connected to the outer wall of the second triangular block, and a limit block is fixedly connected to one end of the slider.

[0024] The above technical solution involves a detector fixedly connected to the outer wall of the triangular block, which can detect the tunnel wall. One end of the slider is fixedly connected to a limiting block, preventing excessive sliding.

[0025] As a further description of the above technical solution:

[0026] A spring is fixedly connected to the front end of the inner wall of the slide rail, and the other end of the spring is fixedly connected to the outer wall of the slider.

[0027] The above technical solution involves a spring fixedly connected to the front end of the inner wall of the slide rail, and the other end of the spring fixedly connected to the outer wall of the slider. When the slider moves under the action of external force within the slide rail, the spring can provide corresponding elastic force according to its own elastic coefficient, thereby resetting the equipment.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, when it is necessary to inspect the high points of a tunnel, the grounding foot is first placed at a certain distance from the tunnel wall. Then, the first-stage rod is tilted so that the detection mechanism is close to the tunnel wall. The crank handle is turned, which drives the worm gear to rotate. The worm gear meshes with the worm wheel, and the rotation of the worm wheel causes the central column to rotate. The central column drives the pulley to rotate. The two pulleys are connected by a transmission cable. The transmission cable rotates, and the lower left end of the transmission cable is fixedly connected to the third-stage rod through locking block two. The upper right end of the transmission cable is fixedly connected to the first-stage rod through locking block one. When the transmission cable rotates, the third-stage rod slides upward relative to the second-stage rod on the inner wall of the second-stage rod, and the first-stage rod slides downward relative to the second-stage rod. The first-stage rod is fixed, that is, the detection mechanism moves upward and can reach the high points of the tunnel, which is convenient for measurement. The structure is simple and easy to carry.

[0030] 2. In this utility model, the fixing block is fixed to the top of the three-stage rod, and the mounting platform is rotatably connected to the fixing block. Multiple wheels are provided on the outer wall of the mounting platform, which allows it to be closely attached to the tunnel wall for measurement. When the detection mechanism extends to the specified height, the thread wheel is rotated to tighten the cable. The cable pulls the first triangular block, and the inclined surface of the first triangular block matches the inclined surface of the second triangular block. The second triangular block slides on the inner wall of the slide rail through the slider. When the first triangular block moves upward, it pushes the second triangular block forward, that is, the detector is close to the tunnel wall, realizing that the detector is closely attached to the measurement, which greatly reduces the error. Attached Figure Description

[0031] Figure 1 This is a front perspective view of a tunnel structure detection device proposed in this utility model;

[0032] Figure 2 This is a cross-sectional view of a secondary rod of a tunnel structure testing device proposed in this utility model;

[0033] Figure 3 This is a partial structural diagram of a worm gear in a tunnel structure detection device proposed in this utility model;

[0034] Figure 4 This is a partial structural diagram of a fixing block for a tunnel structure detection device proposed in this utility model;

[0035] Figure 5 This is a partial structural diagram of a tunnel structure testing equipment mounting platform proposed in this utility model;

[0036] Figure 6 This is a partial structural diagram of the triangular block one of the tunnel structure detection equipment proposed in this utility model.

[0037] Legend:

[0038] 1. First-stage rod; 2. Detection mechanism; 201. Fixing block; 202. Mounting platform; 203. Wheel; 204. Slide rail; 205. Slider; 206. Triangle block one; 207. Triangle block two; 208. Cable; 209. Threaded wheel; 3. Second-stage rod; 4. Fixing component; 5. Pulley; 6. Transmission cable; 7. Locking block one; 8. Locking block two; 9. Third-stage rod; 10. Center column; 11. Worm gear; 12. Worm; 13. Crank handle; 14. Ball; 15. Grounding foot; 16. Anti-slip stud; 17. Reinforcing strip; 18. Guide wheel; 19. Spring; 20. Limiting block; 21. Detector; 22. Protective shell; 23. Sleeve. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Please see the appendix Figure 1 - Appendix Figure 3 This utility model provides an embodiment of a tunnel structure detection device, comprising a primary rod 1, a secondary rod 3 slidably connected to the inner wall of the primary rod 1, a fixing member 4 fixedly connected to the outer wall of the secondary rod 3, a pulley 5 rotatably connected between adjacent fixing members 4 via a central column 10, a transmission cable 6 rotatably connected between adjacent pulleys 5, a locking block 7 fixedly connected to the right side of the transmission cable 6, the outer wall of the locking block 7 fixedly connected to the inner wall of the primary rod 1, a locking block 8 fixedly connected to the left side of the transmission cable 6, a tertiary rod 9 fixedly connected to the outer wall of the locking block 8, a worm gear 11 fixedly connected to the outer wall of the central column 10, a worm 12 meshing with the outer wall of the worm gear 11, and a detection mechanism 2 provided on the outer wall of the tertiary rod 9, the detection mechanism 2 being used to detect the quality of the tunnel lining;

[0041] Specifically, the precise sliding connection between the primary rod 1 and the secondary rod 3 ensures that the secondary rod 3 can move smoothly and flexibly within the primary rod 1. A fixing member 4 is fixedly connected to the outer wall of the secondary rod 3. A pulley 5 is rotatably connected between two adjacent fixing members 4 via a central column 10. The pulley 5 ensures efficient transmission. A transmission cable 6 is rotatably connected between two adjacent pulleys 5. The transmission cable 6 maintains stable performance during long-term use. A locking block 7 is fixedly connected to the right side of the transmission cable 6. The locking block 7 is connected to the primary rod 1... The inner wall is firmly fixed to ensure that there will be no loosening during the operation of the equipment. The left side of the transmission cable 6 is fixedly connected to the locking block 2 8, and the outer wall of the locking block 2 8 is fixedly connected to the three-stage rod 9. When the transmission cable 6 moves under the drive of the pulley 5, the position change of the three-stage rod 9 can be precisely controlled. The outer wall of the central column 10 is fixedly connected to the worm wheel 11. The worm wheel 11 meshes with the worm 12. By rotating the worm 12, the rotation of the worm wheel 11 can be easily controlled, thereby realizing the precise control of the pulley 5 and the transmission cable 6.

[0042] Please see the appendix Figure 4 - Appendix Figure 6 The detection mechanism 2 includes a fixed block 201. The outer wall of the fixed block 201 is fixedly connected to the top of the outer wall of the three-stage rod 9. The outer wall of the fixed block 201 is rotatably connected to a mounting platform 202. The outer wall of the mounting platform 202 is provided with multiple wheels 203. The outer wall of the mounting platform 202 is fixedly connected to a slide rail 204. The inner wall of the slide rail 204 is slidably connected to a slider 205. A triangular block 207 is fixedly connected between adjacent sliders 205. A triangular block 206 is slidably connected to the inner wall of the mounting platform 202. A cable 208 is fixedly connected to the top surface of the triangular block 206. The other end of the cable 208 is wound around the outer wall of a spool 209. The outer wall of the spool 209 is fixedly connected to the outer wall of the first-stage rod 1.

[0043] Specifically, the fixing block 201 is fixedly connected to the outer wall of the three-stage rod 9, forming a whole that can effectively withstand forces from all directions. The outer wall of the fixing block 201 is rotatably connected to the mounting platform 202, allowing the mounting platform 202 to rotate flexibly and smoothly around the fixing block 201. The mounting platform 202 can adjust its angle according to actual working needs, thus better adapting to different testing scenarios and working requirements. Multiple wheels 203 are connected to the outer wall of the mounting platform 202, enabling it to roll smoothly on different surfaces. The outer wall of the mounting platform 202 is fixedly connected to the slide rail 204, allowing it to slide on the inner wall of the slide rail 204. Connecting slider 205 ensures smooth and seamless sliding within slide rail 204. A triangular block 207 is fixedly connected between two adjacent sliders 205. This triangular block plays a crucial role in transmitting force and maintaining structural stability. A triangular block 206 is slidably connected to the outer wall of mounting platform 202. A cable 208 is fixedly connected to the top surface of triangular block 206. The other end of the cable 208 is wound around the outer wall of reel 209. The outer wall of reel 209 is fixedly connected to the outer wall of primary rod 1. The surface of reel 209 has special grooves to ensure that the cable 208 does not slip or fall off during winding. When reel 209 rotates, the cable 208 retracts or expands accordingly, causing triangular block 206 to slide on the outer wall of wheel 203, thus pushing detector 21 against the tunnel wall for close-fitting measurement.

[0044] Please see the appendix Figure 1 - Appendix Figure 3 A ball 14 is fixedly connected to the bottom surface of the first-stage pole 1. A grounding foot 15 is rotatably connected to the outer wall of the ball 14. An anti-slip nail 16 is fixedly connected to the bottom surface of the grounding foot 15. A protective shell 22 is fixedly connected to the outer wall of the first-stage pole 1. A guide wheel 18 is fixedly connected to the top of the third-stage pole 9. A reinforcing strip 17 is fixedly connected to the outer wall of the first-stage pole 1.

[0045] Specifically, a smooth sphere 14 is fixedly connected to the bottom of the first-stage rod 1. The outer wall of the sphere 14 is rotatably connected to the grounding foot 15, allowing the grounding foot 15 to rotate flexibly around the sphere 14. Anti-slip nails 16 are fixedly connected to the bottom of the grounding foot 15, which can effectively increase the friction with the ground and ensure the stability of the entire device when placed. A protective shell 22 is fixedly connected to the outer wall of the first-stage rod 1. A guide wheel 18 is fixedly connected to the top of the third-stage rod 9. The wheel surface of the guide wheel 18 is made of high-elasticity rubber material, which has good flexibility and wear resistance. It can reduce frictional resistance when guiding the relevant components to run, and ensure smooth and stable operation. Several reinforcing strips 17 are evenly distributed and fixedly connected to the outer wall of the first-stage rod 1, which greatly enhances the structural strength of the first-stage rod 1, making it able to withstand greater external forces without easily deforming.

[0046] Please see the appendix Figure 4 - Appendix Figure 6 One end of the worm gear 12 is fixedly connected to a crank handle 13, and the outer wall of the crank handle 13 is rotatably connected to a sleeve 23. The outer wall of the triangular block 207 is fixedly connected to a detector 21. One end of the slider 205 is fixedly connected to a limit block 20. The front end of the inner wall of the slide rail 204 is fixedly connected to a spring 19, and the other end of the spring 19 is fixedly connected to the outer wall of the slider 205.

[0047] Specifically, one end of the worm gear 12 is fixedly connected to the crank handle 13. The outer wall of the crank handle 13 and the sleeve 23 are connected by a clearance fit to achieve rotational connection, so that the sleeve 23 can maintain a relatively stable position when the crank handle 13 rotates, while not hindering the flexible rotation of the crank handle 13. The outer wall of the triangular block 207 is fixedly connected to the detector 21, which can detect the tunnel wall. One end of the slider 205 is fixedly connected to the limit block 20 to prevent excessive sliding. The front end of the inner wall of the slide rail 204 is fixedly connected to the spring 19, and the other end of the spring 19 is fixedly connected to the outer wall of the slider 205. When the slider 205 is moved by an external force in the slide rail 204, the spring 19 can provide corresponding elastic force according to its own elastic coefficient to reset the equipment.

[0048] Working principle: When it is necessary to inspect the high parts of the tunnel, first place the grounding foot 15 at a certain distance from the tunnel wall, then tilt the first-stage rod 1 so that the detection mechanism 2 is close to the tunnel wall, turn the crank handle 13, the crank handle 13 drives the worm gear 12 to rotate, the worm gear 12 meshes with the worm wheel 11, the worm wheel 11 rotates, that is, the central column 10 rotates, the central column 10 drives the pulley 5 to rotate, the two pulleys 5 are connected by the transmission cable 6, the transmission cable 6 rotates, the lower left end of the transmission cable 6 is fixedly connected to the third-stage rod 9 by the locking block 2 8, the upper right end of the transmission cable 6 is fixedly connected to the first-stage rod 1 by the locking block 1 7. When the transmission cable 6 rotates, the third-stage rod 9 slides upward relative to the second-stage rod 3 on the inner wall of the second-stage rod 3, the first-stage rod 1 slides downward relative to the second-stage rod 3, the first-stage rod 1 is fixed, that is, the detection mechanism 2 moves upward, can reach the high parts of the tunnel, which is convenient for measurement, has a simple structure, and is easy to carry;

[0049] The fixing block 201 is fixed to the top of the three-stage rod 9. The mounting platform 202 is rotatably connected to the fixing block 201. Multiple wheels 203 are provided on the outer wall of the mounting platform 202, so that it can be closely attached to the tunnel wall for measurement. When the detection mechanism 2 extends to the specified height, the thread wheel 209 is rotated to tighten the cable 208. The cable 208 pulls the first triangular block 206. The inclined surface of the first triangular block 206 matches the inclined surface of the second triangular block 207. The second triangular block 207 slides on the inner wall of the slide rail 204 through the slider 205. When the first triangular block 206 moves upward, it pushes the second triangular block 207 forward, that is, the detector 21 is close to the tunnel wall, so that the detector 21 is closely attached to the tunnel wall for measurement, which greatly reduces the error.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tunnel structure detection apparatus comprising a primary rod (1), characterised in that: The inner wall of the primary rod (1) is slidably connected with a secondary rod (3), the outer wall of the secondary rod (3) is fixedly connected with a fixing part (4), the adjacent between two fixing parts (4) is rotatably connected with a pulley (5) through a center column (10), the adjacent between two pulleys (5) is rotatably connected with a transmission cable (6), the right side of the transmission cable (6) is fixedly connected with a locking block one (7), the outer wall of the locking block one (7) is fixedly connected with the inner wall of the primary rod (1), the left side of the transmission cable (6) is fixedly connected with a locking block two (8), the outer wall of the locking block two (8) is fixedly connected with a tertiary rod (9), the outer wall of the center column (10) is fixedly connected with a worm gear (11), the outer wall of the worm gear (11) is meshedly connected with a worm (12), the outer wall of the tertiary rod (9) is provided with a detection mechanism (2), and the detection mechanism (2) is used for detecting the quality of tunnel lining.

2. The tunnel structure detection device according to claim 1, characterized in that: The detection mechanism (2) comprises a fixed block (201), the outer wall of the fixed block (201) is fixedly connected with the outer wall top of the tertiary rod (9), the outer wall of the fixed block (201) is rotatably connected with a mounting table (202), the outer wall of the mounting table (202) is provided with a plurality of wheels (203), the outer wall of the mounting table (202) is fixedly connected with a sliding rail (204), the inner wall of the sliding rail (204) is slidably connected with a sliding block (205), the adjacent between two sliding blocks (205) is fixedly connected with a triangular block two (207), the outer wall of the mounting table (202) is slidably connected with a triangular block one (206), the top surface of the triangular block one (206) is fixedly connected with a cable (208), the other end of the cable (208) is wound on the outer wall of a wire wheel (209), and the outer wall of the wire wheel (209) is fixedly connected with the outer wall of the primary rod (1).

3. The tunnel structure detection device of claim 1, wherein: The bottom surface of the primary rod (1) is fixedly connected with a ball (14), and the outer wall of the ball (14) is rotatably connected with a grounding foot (15).

4. The tunnel structure detection device of claim 3, wherein: The bottom surface of the grounding foot (15) is fixedly connected with an anti-skid nail (16), and the outer wall of the primary rod (1) is fixedly connected with a protective shell (22).

5. The tunnel structure detection device of claim 1, wherein: The top of the tertiary rod (9) is fixedly connected with a guide wheel (18), and the outer wall of the primary rod (1) is fixedly connected with a reinforcing strip (17).

6. The tunnel structure detection device of claim 1, wherein: One end of the worm (12) is fixedly connected with a crank (13), and the outer wall of the crank (13) is rotatably connected with a sleeve (23).

7. The tunnel structure detection device of claim 2, wherein: The outer wall of the triangular block two (207) is fixedly connected with a detector (21), and one end of the sliding block (205) is fixedly connected with a limiting block (20).

8. The tunnel structure detection device of claim 2, wherein: The inner wall of the sliding rail (204) is fixedly connected with a spring (19) at the front end, and the other end of the spring (19) is fixedly connected with the outer wall of the sliding block (205). The inner wall of the sliding rail (204) is fixedly connected with a spring (19) at the front end, and the other end of the spring (19) is fixedly connected with the outer wall of the sliding block (205).

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