Bridge tunnel crack detection device

Abstract

The application relates to the technical field of bridge and tunnel crack detection, in particular to a bridge and tunnel crack detection device. In view of the fact that the bridge and tunnel crack detection device in the prior art is inconvenient to protect the detection equipment, thereby causing damage to the detection equipment, the following scheme is provided, which comprises a base, a groove is arranged at the top of the base and located at the middle position, a lead screw is rotatably arranged on the inner wall of the bottom of the groove and located at the middle position, a moving column is threadedly connected to the lead screw, a workbench is rotatably arranged at the top of the moving column, two first fixing plates are fixedly arranged on the left and right sides of the top of the workbench, a protection assembly is rotatably arranged on the first fixing plate, and a transmission assembly is arranged on the top of the base. The application is convenient to protect the detection equipment, thereby avoiding damage to the detection equipment.

Description

Technical Field

[0001] This application relates to the field of bridge and tunnel crack detection technology, and in particular to a bridge and tunnel crack detection device. Background Technology

[0002] Bridge and tunnel crack detection devices are specialized equipment used to monitor cracks on the surface of concrete structures. Their core functions include the quantitative analysis of crack width, depth, and propagation trend.

[0003] Patent document CN222104674U discloses a bridge and tunnel crack detection device, belonging to the field of bridge and tunnel crack detection technology. This device includes a base plate; a support column fixedly connected to the upper end of the base plate; a sleeve fitted onto the support column; a connecting seat fixedly connected to the upper end of the sleeve; a rotating rod rotatably connected to the connecting seat; and a detection device fixedly connected to one side of the rotating rod. In actual bridge and tunnel inspections, cracks may be located in different positions within the bridge or tunnel. Through the height adjustment function of the sleeve and support column, operators can easily adjust the height of the detection device according to inspection needs. This design allows the device to adapt to crack detection in different locations without requiring replacement or adjustment of other components, improving the flexibility and applicability of the equipment.

[0004] However, the aforementioned bridge and tunnel crack detection device is not easy to protect, which may cause damage to the detection equipment. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing bridge and tunnel crack detection devices, which are inconvenient to protect and may damage the detection equipment. Therefore, this invention proposes a bridge and tunnel crack detection device.

[0006] The bridge and tunnel crack detection device provided in this application adopts the following technical solution: A bridge and tunnel crack detection device, comprising: The base has a groove at the top and center. A lead screw is rotatably mounted on the bottom inner wall of the groove and located in the middle position, and a movable column is threaded onto the lead screw; The workbench is rotatably mounted on the top of the movable column, and two first fixing plates are fixedly installed on the left and right sides of the top of the workbench. The protective component is rotatably mounted on the first fixed plate; A transmission assembly is located on top of the base.

[0007] Furthermore, the protective assembly includes two rotating shafts, which are rotatably mounted on four first fixed plates. A protective cover is fixedly fitted on the outer wall of the rotating shaft, and a second fixed plate is fixedly installed on the top front side of the base.

[0008] By adopting the above technical solution, the two rotating shafts drive the two protective covers to rotate respectively.

[0009] Furthermore, a worm gear is rotatably mounted on the second fixed plate, the worm gear meshing with a worm wheel, and the worm wheel is fixedly sleeved on the outer wall of one of the two rotating shafts.

[0010] By adopting the above technical solution, the worm drives the worm wheel to rotate, and the worm wheel drives one of the two rotating shafts to rotate.

[0011] Furthermore, a first bevel gear is fixedly mounted on the front end of one of the two rotating shafts, and the first bevel gear meshes with a second bevel gear. A transmission shaft is fixedly mounted on the second bevel gear, and the transmission shaft is rotatably mounted on a second fixed plate.

[0012] By adopting the above technical solution, one of the two rotating shafts drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, and the second bevel gear drives the transmission shaft to rotate.

[0013] Furthermore, a third bevel gear is fixedly installed at the left end of the transmission shaft, and the third bevel gear meshes with a fourth bevel gear, which is fixedly installed at the front end of the other rotating shaft among the two rotating shafts.

[0014] By adopting the above technical solution, the transmission shaft drives the third bevel gear to rotate, the third bevel gear drives the fourth bevel gear to rotate, and the fourth bevel gear drives the other rotating shaft of the two rotating shafts to rotate.

[0015] Furthermore, the transmission assembly includes a support plate, which is fixedly installed on the top of the base. A rack is fixedly installed on the rear side of the support plate, and the rack meshes with a first gear, which is fixedly sleeved on the outer wall of the worm.

[0016] By adopting the above technical solution, the rack and the first gear mesh and drive the rack to rotate, and the first gear drives the worm to rotate.

[0017] Furthermore, an installation box is fixedly installed on the bottom inner wall of the groove, and a drive motor is fixedly installed on the inner wall of the installation box.

[0018] Furthermore, a second gear is fixedly sleeved on the output shaft of the drive motor, and the second gear meshes with a third gear, which is fixedly sleeved on the outer wall of the lead screw.

[0019] By adopting the above technical solution, the drive motor drives the second gear to rotate, the second gear drives the third gear to rotate, and the third gear drives the lead screw to rotate.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. It can achieve high-precision vertical lifting of the worktable (error can be controlled within millimeters) through the threaded engagement of the lead screw and the moving column, and can accurately match detection scenarios of different heights such as 3-8 meters; 2. Through the linkage structure of "lead screw, rack, worm gear and bevel gear", the opening and closing of the protective cover and the lifting and lowering of the worktable can be automatically synchronized: when the worktable rises to the inspection height, the protective cover opens automatically; when it falls to the initial position, it closes automatically, eliminating the step of manually opening and closing the protective cover and reducing the operation time of a single inspection (such as saving 5-10 minutes per inspection). It is especially suitable for large-scale, continuous bridge and tunnel inspection operations and significantly improves inspection efficiency. Attached Figure Description

[0021] Figure 1 This is a front view structural schematic diagram of a bridge tunnel crack detection device according to Embodiment 1 of this application; Figure 2 This is a side sectional view of a bridge tunnel crack detection device according to Embodiment 1 of this application; Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle; Figure 4 yes Figure 2 Enlarged diagram of part B.

[0022] Reference numerals in the attached drawings: 1. Base; 2. Lead screw; 3. Moving column; 4. Worktable; 5. First fixed plate; 6. Rotating shaft; 7. Protective cover; 8. Second fixed plate; 9. Worm; 10. Worm wheel; 11. First bevel gear; 12. Second bevel gear; 13. Transmission shaft; 14. Third bevel gear; 15. Fourth bevel gear; 16. Support plate; 17. Rack; 18. First gear; 19. Drive motor; 20. Second gear; 21. Third gear. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1: Refer to Figures 1-4 A bridge and tunnel crack detection device, comprising: The base 1 has a groove at its top and in the middle position; The lead screw 2 is rotatably installed on the bottom inner wall of the groove and located in the middle position, and the lead screw 2 is threadedly connected to the movable column 3; The workbench 4 is rotatably mounted on the top of the movable column 3, and two first fixing plates 5 are fixedly installed on the left and right sides of the top of the workbench 4. The protective components are rotatably mounted on the first fixed plate 5; The transmission assembly is located on the top of the base 1.

[0025] Specifically, the protective assembly includes two rotating shafts 6, which are rotatably mounted on four first fixed plates 5 respectively. A protective cover 7 is fixedly sleeved on the outer wall of the rotating shaft 6, and a second fixed plate 8 is fixedly mounted on the top front side of the base 1.

[0026] Specifically, a worm gear 9 is rotatably mounted on the second fixed plate 8, the worm gear 9 meshes with a worm wheel 10, and the worm wheel 10 is fixedly sleeved on the outer wall of one of the two rotating shafts 6.

[0027] Specifically, a first bevel gear 11 is fixedly installed at the front end of one of the two rotating shafts 6, and the first bevel gear 11 meshes with a second bevel gear 12. A transmission shaft 13 is fixedly installed on the second bevel gear 12, and the transmission shaft 13 is rotatably installed on the second fixed plate 8.

[0028] Specifically, a third bevel gear 14 is fixedly installed on the left end of the drive shaft 13, and the third bevel gear 14 meshes with a fourth bevel gear 15. The fourth bevel gear 15 is fixedly installed at the front end of the other rotating shaft 6 among the two rotating shafts 6.

[0029] Specifically, the transmission assembly includes a support plate 16, which is fixedly installed on the top of the base 1. A rack 17 is fixedly installed on the rear side of the support plate 16, and the rack 17 meshes with a first gear 18, which is fixedly sleeved on the outer wall of the worm 9.

[0030] Specifically, an installation box is fixedly installed on the bottom inner wall of the groove, and a drive motor 19 is fixedly installed on the inner wall of the installation box.

[0031] Specifically, a second gear 20 is fixedly sleeved on the output shaft of the drive motor 19, and the second gear 20 meshes with a third gear 21, which is fixedly sleeved on the outer wall of the lead screw 2.

[0032] A gearbox and speed control module are installed on the drive motor 19, supporting two modes: "rapid coarse adjustment" and "precise fine adjustment". During coarse adjustment, the motor runs at high speed to quickly approach the target height; during fine adjustment, the motor runs at low speed to ensure that the height error is controlled within ±0.5mm, balancing efficiency and accuracy.

[0033] A small servo motor and harmonic reducer are installed between the top of the moving column 3 and the worktable 4. The servo motor drives the worktable 4 to rotate through the reducer (achieving stepless rotation from 0 to 360° with an angle accuracy of ±0.1°). The operator can control the angle of the worktable 4 with a remote control without manual adjustment, making it especially suitable for inspection scenarios at heights and in confined spaces.

[0034] The installation box has been upgraded to an IP68-rated sealed enclosure with double sealing rings at the interface. An internal dehumidification module (which automatically starts when the humidity exceeds 60%) has been added to prevent humid air from entering and damaging the drive motor 19 and gear assembly. The exterior of the enclosure is coated with an anti-salt spray coating to adapt to the high salt spray environment of coastal bridges.

[0035] A telescopic dust cover (such as an accordion cover) is installed at the joint between the lead screw 2 and the moving column 3 to prevent dust from entering the thread gap and causing jamming. The dust cover 7 extends and retracts synchronously with the moving column 3, without affecting normal movement, and can also isolate the lead screw 2 from the impact of gravel.

[0036] Rubber shock-absorbing pads (10-15mm thick, 50 Shore A hardness) are installed at the bottom of base 1 to reduce the impact of vibrations caused by vehicle traffic and equipment movement in bridge tunnels on transmission components; metal counterweights are added to the bottom of worktable 4 to reduce the swaying amplitude of worktable 4 during lifting and lowering, ensuring stable data acquisition by testing equipment (such as cameras).

[0037] Infrared sensors are installed on the edge of the protective cover 7. If an obstacle (such as personnel or equipment) is detected in the opening and closing path of the protective cover 7, the operation will automatically stop and an alarm will be triggered to avoid collision. Protective railings are installed on both sides of the workbench 4 to prevent the detection equipment from slipping.

[0038] A support frame is provided on the top of the base 1. A sliding groove is provided on the support frame. A slider is provided on the moving column 3. The slider slides in the sliding groove to support and limit the moving column 3, so as to prevent the moving column 3 from rotating with the lead screw 2.

[0039] The implementation principle of the bridge and tunnel crack detection device in this application embodiment is as follows: During use, the drive motor 19 is powered on and starts, driving the coaxially fixed second gear 20 to rotate. The second gear 20 meshes with the third gear 21 fixed on the lead screw 2, transmitting power to the lead screw 2, causing it to rotate around its own axis. Simultaneously, as the lead screw 2 rotates on the inner wall of the groove bottom, the thread on its outer wall meshes with the thread on the inner wall of the moving column 3, converting the rotational motion of the lead screw 2 into the vertical lifting motion of the moving column 3. The worktable 4 at the top of the moving column 3 rises and falls synchronously with the moving column 3 until a suitable detection height is adjusted, such as the height of tunnel sidewall cracks or bridge support height. The worktable 4 can then rotate, and the detection angle can be adjusted manually or through other mechanisms to further expand the detection range. When the lead screw 2 rotates, it indirectly drives the rack 17 to mesh with the first gear 18 fixed on the worm 9, causing the worm 9 to rotate on the second fixed plate 8. The worm 9 meshes with the worm wheel 10 on one of the two rotating shafts 6, thus... The horizontal rotation of the worm gear 9 is converted into the vertical rotation of the two rotating shafts 6. The protective covers 7 fixed to the outer walls of the two rotating shafts 6 rotate synchronously with the two rotating shafts 6, and begin to open outward or close inward. The first bevel gear 11 fixed to the front end of one of the two rotating shafts 6 rotates and is linked with the vertically meshing second bevel gear 12, driving the transmission shaft 13 to rotate on the second fixed plate 8. The third bevel gear 14 at the left end of the transmission shaft 13 rotates with the transmission shaft 13 and meshes with the fourth bevel gear 15 at the front end of the other rotating shaft 6, driving the two rotating shafts 6 to rotate. The protective covers 7 on the two second rotating shafts 6 rotate synchronously, ultimately achieving the simultaneous opening or closing of the two protective covers 7: when the worktable 4 rises to the detection height, the two protective covers 7 are fully opened, exposing the detection equipment on the worktable 4, which is convenient for collecting crack data; when the worktable 4 descends to the initial position, the two protective covers 7 are fully closed, enclosing the detection equipment inside, preventing damage from dust and collisions during transportation or when idle.

[0040] Example 2: The difference between this example and Example 1 is that a high-definition industrial camera, a laser rangefinder, and an AI image processing module are fixed on the workbench 4. After the camera acquires images of the cracks, the AI ​​module can automatically identify the cracks (recognition rate ≥95%), and measure the crack width (accuracy ±0.02mm) and length using the laser sensor. The data is directly stored in the built-in memory without the need for manual judgment and recording.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bridge tunnel crack detection device, characterized in that: include: The base (1) has a groove at the top and in the middle position; The lead screw (2) is rotatably installed on the bottom inner wall of the groove and located in the middle position, and the lead screw (2) is threaded with a movable column (3). The workbench (4) is rotatably mounted on the top of the movable column (3), and two first fixing plates (5) are fixedly installed on the left and right sides of the top of the workbench (4). The protective component is rotatably mounted on the first fixed plate (5); The transmission assembly is located on top of the base (1).

2. The bridge tunnel crack detection device according to claim 1, characterized in that: The protective assembly includes two rotating shafts (6), and the two rotating shafts (6) are respectively rotatably mounted on four first fixed plates (5). A protective cover (7) is fixedly sleeved on the outer wall of the rotating shaft (6), and a second fixed plate (8) is fixedly installed on the top front side of the base (1).

3. The bridge tunnel crack detection device according to claim 2, characterized in that: A worm (9) is rotatably mounted on the second fixed plate (8), the worm (9) meshing with a worm wheel (10), and the worm wheel (10) is fixedly sleeved on the outer wall of one of the two rotating shafts (6).

4. The bridge tunnel crack detection device according to claim 3, characterized in that: A first bevel gear (11) is fixedly installed at the front end of one of the two rotating shafts (6), and the first bevel gear (11) meshes with a second bevel gear (12). A transmission shaft (13) is fixedly installed on the second bevel gear (12), and the transmission shaft (13) is rotatably installed on the second fixed plate (8).

5. A bridge tunnel crack detection device according to claim 4, characterized in that: The left end of the drive shaft (13) is fixedly mounted with a third bevel gear (14), and the third bevel gear (14) meshes with a fourth bevel gear (15). The fourth bevel gear (15) is fixedly mounted at the front end of the other rotating shaft (6) among the two rotating shafts (6).

6. A bridge tunnel crack detection device according to claim 5, characterized in that: The transmission assembly includes a support plate (16), which is fixedly installed on the top of the base (1). A rack (17) is fixedly installed on the rear side of the support plate (16), and the rack (17) meshes with a first gear (18). The first gear (18) is fixedly sleeved on the outer wall of the worm (9).

7. A bridge tunnel crack detection device according to claim 6, characterized in that: An installation box is fixedly installed on the bottom inner wall of the groove, and a drive motor (19) is fixedly installed on the inner wall of the installation box.

8. A bridge tunnel crack detection device according to claim 7, characterized in that: The output shaft of the drive motor (19) is fixedly fitted with a second gear (20), and the second gear (20) meshes with a third gear (21), which is fixedly fitted on the outer wall of the lead screw (2).

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