A tunnel steel member corrosion degree detection device

Abstract

The present application relates to the technical field of detection equipment, and particularly relates to a tunnel steel member rust degree detection device. The specific technical scheme is as follows: a tunnel steel member rust degree detection device, which comprises a handle, a strip-shaped hole is arranged through one side of the handle, a clamping mechanism is arranged in the strip-shaped hole, the clamping jaws of the clamping mechanism are arranged on the two sides of the handle and correspondingly, a scraping mechanism is arranged at one end of the handle, the scraping mechanism is arranged between the two clamping jaws, the scraping mechanism comprises a bottom plate and a grinding wheel arranged on the bottom plate through a support, and the grinding wheel is driven by a motor; a laser displacement sensor is arranged at one end of the handle, and the laser displacement sensor is arranged on the side of the scraping mechanism. The present application solves the problems of poor portability, slow detection speed, easy environmental interference and inability to realize preliminary quantitative judgment of the rust degree on site quickly of the existing tunnel steel member rust detection equipment.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and specifically to a device for detecting the degree of corrosion of steel components in tunnels. Background Technology

[0002] Tunnels are constantly exposed to harsh environments characterized by high humidity, dust, and poor ventilation, making steel components (arches, anchor bolts, support pipes, etc.) highly susceptible to corrosion. The degree of corrosion directly affects the structural safety and service life of the tunnel. Currently, corrosion detection of tunnel steel components generally relies on traditional methods such as manual visual inspection and hammering, which are not only inefficient and subjective in judgment but also unable to quantitatively assess the degree of corrosion.

[0003] To achieve quantitative detection, existing technologies mostly employ chemical detection methods and magnetic signal detection methods. However, these methods have significant limitations in practical applications in tunnels: chemical detection methods require on-site sampling and analysis in the laboratory, which is cumbersome and time-consuming, failing to meet the needs of rapid tunnel inspection and immediate assessment. Furthermore, the carrying and handling of reagents pose safety hazards. While magnetic signal detection instruments can achieve non-contact measurement, the equipment is bulky and inconvenient to carry, making it poorly adaptable to the narrow and complex working spaces within tunnels. They are also susceptible to interference from dust, humidity, and stray magnetic fields within the tunnel, resulting in insufficient detection stability and making it difficult to provide intuitive and verifiable preliminary assessment results of corrosion.

[0004] Existing testing equipment generally suffers from poor portability, slow testing speed, and inability to make rapid preliminary judgments on-site, making it unsuitable for the actual working conditions of daily inspection and rapid investigation of tunnel steel components. Therefore, developing a testing device that is easy to carry, highly efficient and fast, and can directly make preliminary quantitative judgments on the degree of corrosion on-site has become an urgent need in the field of tunnel structural safety inspection. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a device for detecting the degree of corrosion of tunnel steel components, which solves the problems of poor portability, slow detection speed, susceptibility to environmental interference, and inability to quickly and quantitatively determine the degree of corrosion on-site.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention discloses a device for detecting the degree of corrosion of tunnel steel components, including a handle. A strip-shaped hole is provided through one side of the handle, and a clamping mechanism is provided in the strip-shaped hole. The clamping jaws of the clamping mechanism extend out of both sides of the handle and are correspondingly arranged. A scraping mechanism is provided at one end of the handle, and the scraping mechanism is located between the two clamping jaws. The scraping mechanism includes a base plate and a grinding wheel mounted on the base plate by a bracket. The grinding wheel is driven by a motor. A laser displacement sensor is provided at one end of the handle and is located next to the scraping mechanism.

[0008] Preferably, the bottom of the base plate is provided with a height adjustment mechanism, which includes a closed threaded sleeve and a stud that extends into and fits into the threaded sleeve. The other end of the stud is vertically disposed at the center of the end of the handle. A screw plate is fitted and fixed to the end of the stud that extends out of the threaded sleeve. At least two L-shaped connecting brackets are provided circumferentially on the closed end of the threaded sleeve, and the other end of the connecting brackets is fixed to the base plate.

[0009] Preferably, the other end of the stud is fixed to the end of the handle by a bearing. The stud located below the screw plate is a smooth section, and multiple limiting strips are provided on the smooth section along its axial direction. A positioning ring is fitted on the smooth section of the stud. The inner ring of the positioning ring is provided with limiting notches that correspond one-to-one with the limiting strips and are adapted to each other. The distance between the top of the limiting strip and the screw plate is greater than or equal to the thickness of the positioning ring. The positioning ring is provided with a positioning notch, and a positioning post is detachably provided in the positioning notch.

[0010] Preferably, a horizontal plate is provided below the base plate, and a connecting shaft is provided at the center of the horizontal plate. A groove is provided on the top of the connecting shaft along its axial direction. A connecting post extending into the groove is provided at the bottom of the base plate. A spring is provided between the bottom of the connecting post and the bottom of the groove. A limit block is provided circumferentially on the bottom of the connecting post. A limit groove corresponding to the limit block is provided on the inner wall of the groove. The height difference between the limit groove and the limit block is the maximum extension and contraction of the base plate in the axial direction of the connecting post. In the initial state, the limit block is in contact with the top of the limit groove.

[0011] Preferably, the bottom of the base plate is provided with an annular groove around the connecting column, the top of the connecting shaft extends into the annular groove, and the distance between the top of the connecting shaft and the top of the annular groove is equal to the height difference between the limiting groove and the limiting block.

[0012] Preferably, the top of the bracket is provided with a U-shaped notch, and a fixed bearing is provided in the U-shaped notch. The shafts at both ends of the grinding wheel extend into the fixed bearing and are fixed. The top of the bracket is provided with a cover plate, and the bottom of the cover plate is provided with an arc-shaped block that matches the outer ring of the fixed bearing, thereby pressing and fixing the fixed bearing.

[0013] Preferably, the fixed bearing is provided with a fixed post at the top and bottom, and the bottom of the U-shaped notch and the bottom of the arc-shaped block are respectively provided with cylindrical holes that correspond to and fit the fixed post.

[0014] Preferably, the clamping mechanism includes two L-shaped jaws, the horizontal part of the jaws is inserted into the strip-shaped hole, and a rack is vertically arranged on the end face of the horizontal part of the jaws. The two jaws are arranged in a centrally symmetrical manner, and the horizontal part of each of the two jaws is provided with a through hole for the rack on the other jaw to pass through.

[0015] A gear is provided in the middle between the two racks, and the gear meshes with the two racks respectively. A transmission rod is provided through the center of the gear. The two ends of the transmission rod are fixed by bearings. A dial wheel is sleeved and fixed on the transmission rod. The handle is provided with a groove to accommodate the dial wheel and the transmission rod. The handle is provided with a through hole for the dial wheel to extend out of the handle.

[0016] Preferably, the vertical part of the gripper is a telescopic structure, and the end face of the vertical part of the gripper and the connection between the horizontal part is provided with an extension groove. The horizontal part of the gripper is provided with an extension plate that extends into the extension groove. A rubber pad with a concave surface is provided on the plate surface corresponding to the vertical part of the gripper.

[0017] Preferably, the handle has slots on both sides along its length, a support rod is provided in the slot, one end of the support rod is provided as a threaded head, and the bottom surface of the handle has a screw hole that is adapted to the threaded head.

[0018] The present invention has the following beneficial effects:

[0019] 1. This invention integrates the clamping mechanism, the scraping mechanism, and the laser displacement sensor, allowing all three to share the same handle and the same positioning reference. This enables continuous operation of clamping, rust removal, and thickness detection in a single setup, eliminating the need for repeated disassembly and relocation. This significantly improves the detection speed and ensures the accuracy and reliability of the detection data to a certain extent. It also allows for a rapid preliminary quantitative assessment of the degree of rust on-site.

[0020] 2. This invention utilizes a height adjustment mechanism comprised of a stud, a threaded sleeve, and a connecting frame. This mechanism allows for adjustment of the working height between the grinding wheel and the surface being measured, as well as flexible adjustment of the working angle of the scraping mechanism, adapting to the inspection of steel components at different positions and angles. The positioning ring and limiting strip work together to lock the mechanism after adjustment, preventing loosening due to vibration and further enhancing the stability and consistency of scraping and inspection. Simultaneously, the elastic floating fit structure strengthens the stability of grinding wheel contact for rust removal and distance detection, significantly reducing errors caused by environmental and operational factors.

[0021] 3. The present invention features a retractable and rotatable foldable gripper design, which allows the device to adapt to various tubular and plate-shaped steel components, improving its versatility on site. The quick-assembly structure with U-shaped bracket, fixed bearing, and cover plate clamping enables rapid disassembly and replacement of the grinding wheel, reducing the difficulty of on-site maintenance. Combined with a retractable support rod, the device is more portable, provides more stable support, and has greater overall practicality. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 for Figure 1 Cross-sectional view of the scraping mechanism;

[0024] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0025] Figure 4 for Figure 3 Enlarged view of part B in the middle;

[0026] Figure 5 This is a schematic diagram of the handle structure;

[0027] Figure 6 This is a schematic diagram of the clamping mechanism.

[0028] Figure 7 for Figure 6 A schematic diagram of the structure after the vertical part is extended based on the above;

[0029] Figure 8 This is a sectional view of the connection between the fixed plate and the movable plate;

[0030] Figure 9 This is a schematic diagram of the base plate structure;

[0031] Figure 10 A schematic diagram of the height adjustment mechanism;

[0032] Figure 11 This is a schematic diagram of the support structure;

[0033] Figure 12 for Figure 11 Exploded view of the support shown;

[0034] In the diagram: 1. Handle; 2. Strip hole; 3. Base plate; 4. Bracket; 5. Grinding wheel; 6. Motor; 7. Laser displacement sensor; 8. Screw sleeve; 9. Screw; 10. Rotating disc; 11. Connecting frame; 12. Limiting strip; 13. Positioning ring; 14. Positioning post; 15. Positioning notch; 16. Horizontal plate; 17. Through hole; 18. Rubber pad; 19. Connecting shaft; 20. Groove; 21. Connecting post; 22. Spring; 23. Limiting block; 24. Limiting groove; 25. Annular groove; 26. U-shaped notch; 27. Fixed bearing; 28. Cover plate; 29. ​​Arc block; 30. Fixed post; 31. Column hole; 32. Rack; 33. Through hole; 34. Gear; 35. Transmission rod; 36. Dial wheel; 37. Vertical part; 38. Extension plate; 39. Fixed plate; 40. Movable plate; 41. Rotating shaft; 42. Semi-threaded groove; 43. Threaded groove; 44. Slot; 45. Support rod; 46. Protective shell. Detailed Implementation

[0035] 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.

[0036] Unless otherwise specified, the technical means used in the implementation examples are conventional means well known to those skilled in the art.

[0037] refer to Figures 1-12 This invention discloses a device for detecting the degree of corrosion of tunnel steel components, particularly a portable detection device. It determines the degree of corrosion by measuring the thickness of the rust layer. For example: a rust layer thickness of 0.05-0.2 mm indicates uniform surface rust; a rust layer thickness of 0.2-0.5 mm indicates moderate corrosion; and a rust layer thickness of 0.5-2 mm indicates severe corrosion, with some areas reaching 3-5 mm in severe cases. This device obtains the rust layer thickness by detecting the distance difference before and after rust removal, and can determine the corrosion level according to engineering standards. The above thickness ranges are merely illustrative and do not constitute a limitation on the scope of protection of this invention. In actual measurement, this invention first measures the distance between the device and the rust layer. After scraping away the rust layer, the change in distance is observed to obtain rust layer thickness data, thereby determining the degree of corrosion.

[0038] Specifically: The rust detection device disclosed in this invention includes a handle 1, with a grip provided as needed for easy handling and movement. A strip-shaped hole 2 is provided through one side of the handle 1, and a clamping mechanism is provided within the strip-shaped hole 2. The clamping mechanism is mainly used for clamping and fixing tubular steel components. The clamping jaws of the clamping mechanism extend out from both sides of the handle 1 and are correspondingly positioned. A scraping mechanism is provided at one end of the handle 1, located between the two clamping jaws. After the clamping mechanism fixes the tubular steel component, the scraping mechanism is activated to scrape off the rust layer. Specifically: The scraping mechanism includes a base plate 3 and a grinding wheel 5 mounted on the base plate 3 via a bracket 4. The grinding wheel 5 is driven by a motor 6, such as through gear transmission or pulley transmission. The motor can be mounted on the base plate, below the grinding wheel. A battery is also provided as needed. For dust prevention, the motor and battery are housed inside a protective shell 46. A laser displacement sensor 7 is provided at one end of the handle 1, located beside the scraping mechanism. After the clamping mechanism clamps and fixes the tubular steel component, the laser displacement sensor 7 measures the distance to the rust surface. Then, the scraping mechanism is activated to remove the rust. Next, at the same location, the distance between the exposed steel component surface and the rust layer is measured; the difference between the two is the rust thickness. However, there is a problem: the distance between the grinding wheel and the rust surface is fixed. After the rust layer is removed, the distance between the grinding wheel and the steel component needs to be adjusted to obtain the difference. This adjustment requires loosening the clamping mechanism and then re-clamping and fixing it. Each adjustment requires repositioning, which easily introduces repeated clamping errors and affects the accuracy of the rust thickness calculation.

[0039] Therefore, the laser displacement sensor 7 is aligned with the base plate 3. A height adjustment mechanism is installed at the bottom of the base plate 3. While keeping the clamping mechanism stationary, the distance between the grinding wheel and the rust surface is adjusted. As the rust layer falls off, the laser displacement sensor monitors the change in distance between the laser displacement sensor 7 and the base plate 3 in real time. When the rate of distance change suddenly slows down / approaches 0, it indicates that the steel component's substrate has been reached. When the height change is less than a set threshold (specifically set according to actual conditions) within N milliseconds or N seconds, it is considered that the steel substrate has been exposed and the rust layer has been completely removed. It should be noted that to improve measurement accuracy, grinding can be paused after a single scraping operation before distance acquisition to eliminate interference from impurities and dust during grinding wheel rotation. Also, a relatively flat rust surface should be selected for scraping and measurement, avoiding uneven or recessed areas. To facilitate data acquisition, a display with a storage module can be installed on the handle. The display is connected to the laser displacement sensor, and the data measured by the laser displacement sensor is displayed on the display in real time and saved through the storage module for easy verification.

[0040] Specifically: The height adjustment mechanism includes a closed-end threaded sleeve 8 and a stud 9 that extends into and fits into the threaded sleeve 8. The other end of the stud 9 is vertically positioned at the center of the end of the handle 1. A rotating disc 10 is fitted and fixed to the end of the stud 9 extending out of the threaded sleeve 8. At least two L-shaped connecting brackets 11 are arranged circumferentially on the closed end of the threaded sleeve 8. The other end of the connecting bracket 11 is fixed to the base plate 3. It should be noted that the distance between the grinding wheel and the rusted surface is achieved by rotating the stud with the rotating disc, thereby causing the threaded sleeve to move linearly. Therefore, the other end of the stud 9 is fixed to the end of the handle 1 by a bearing, allowing the stud to rotate. It is important to note that to ensure the threaded sleeve does not rotate with the stud, the operator needs to hold the threaded sleeve in place by hand while rotating the threaded sleeve, and then rotate the stud. If the angle needs to be adjusted, it is not necessary to hold it in place by hand. After adjusting the angle of the grinding wheel, the threaded sleeve or base plate should be held in place by hand before rotating the stud to adjust the height.

[0041] Furthermore, to prevent the stud from slightly rotating due to vibrations generated during the rotation of the grinding wheel, which could affect the scraping operation, the stud is fixed after adjustment to ensure the stability of the entire scraping mechanism during operation. Specifically: the stud 9 located below the rotating disc 10 has a smooth section, and multiple limiting strips 12 are provided along its axial direction on the smooth section. A positioning ring 13 is fitted on the smooth section of the stud 9. The inner ring of the positioning ring 13 has limiting notches that correspond one-to-one with and fit the limiting strips 12. The limiting strips are located within the limiting notches, allowing the positioning ring to move along the axial direction of the limiting strips without rotating. The distance between the top of the limiting strip 12 and the rotating disc 10 is greater than or equal to the thickness of the positioning ring 13. The positioning ring 13 has positioning notches 15, and the number of positioning notches can be set multiple as needed. It should be noted that the positioning pin is detachably located below the positioning ring. After the stud has been rotated and adjusted, the limiting notch on the positioning ring is aligned with the limiting strip, allowing the positioning ring to move along the limiting strip until it contacts the end face of the handle. Then, according to the position of the positioning notch, the positioning pin is inserted into the positioning notch, thereby fixing the positioning ring and preventing it from rotating. Simultaneously, under the restriction of the limiting strip, the stud also cannot rotate, ultimately achieving a non-rotating state for the entire scraping device. The detachable fixing of the positioning pin is a conventional method. For example, an annular groove is provided on the end face of the handle at the position of the positioning notch. Regardless of how the positioning ring rotates, the annular groove always corresponds to the positioning notch. The positioning pin is then inserted into the annular groove within the positioning notch. Alternatively, the positioning pin can be a stud screwed into the annular groove. The stud and screw sleeve configuration in this invention not only allows adjustment of the grinding wheel's height but also its angle.

[0042] Furthermore, to avoid large adjustment errors caused by manually adjusting the distance between the grinding wheel and the rust surface, and to avoid requiring certain skills from the operator, the contact between the grinding wheel and the rust layer is made into an elastic floating contact. As the rust layer falls off, the grinding wheel automatically presses down as the rust layer thins until the rust layer is completely removed. That is, the grinding wheel forms an elastic floating contact with the surface of the steel component. As the rust layer is removed, the grinding wheel automatically adheres to the steel substrate under the action of the spring, ensuring thorough rust removal without damaging the substrate. Specifically: A horizontal plate 16 is provided below the base plate 3, and a connecting shaft 19 is provided at the center of the horizontal plate 16. A groove 20 is provided on the top of the connecting shaft 19 along its axial direction. A connecting post 21 extending into the groove 20 is provided at the bottom of the base plate 3. A spring 22 is provided between the bottom of the connecting post 21 and the bottom of the groove 20. A limit block 23 is provided circumferentially on the bottom of the connecting post 21. Multiple limit blocks are provided as needed. A limit groove 24 corresponding to the limit block 23 is provided on the inner wall of the groove 20. The height difference between the limit groove 24 and the limit block 23 is the maximum extension and contraction of the base plate 3 in the axial direction of the connecting post 21. In the initial state, the limit block 23 is in contact with the top of the limit groove 24. It should be noted that since the base plate and grinding wheel have a certain weight, the spring coefficient should be selected based on the weight of the base plate and all the components on it. The spring should be selected based on the initial state in which the top of the limiting block 23 and the limiting groove 24 are just in contact.

[0043] Furthermore, in order to ensure the stability of the cooperation between the connecting shaft and the connecting column, an annular groove 25 is provided at the bottom of the base plate 3 around the connecting column 21. The top of the connecting shaft 19 extends into the annular groove 25. The distance between the top of the connecting shaft 19 and the top of the annular groove 25 is equal to the height difference between the limiting groove 24 and the limiting block 23, and the height difference is the maximum thickness of the measurable rust layer.

[0044] Furthermore, to facilitate wheel replacement, the connection between the grinding wheel and the support is detachable. (Reference) Figure 11 , 12As shown. Specifically: The top of the bracket 4 is provided with a U-shaped notch 26, and a fixed bearing 27 is provided inside the U-shaped notch 26. The shafts at both ends of the grinding wheel 5 extend into the fixed bearing 27 and are fixed. The top of the bracket 4 is provided with a cover plate 28, and the bottom of the cover plate 28 is provided with an arc-shaped block 29 that matches the outer ring of the fixed bearing 27, thereby pressing and fixing the fixed bearing 27. To ensure the stability of the fixed bearing, the top and bottom of the fixed bearing 27 are provided with fixing posts 30. The bottom of the U-shaped notch 26 and the bottom of the arc-shaped block 29 are respectively provided with cylindrical holes 31 that correspond to and match the fixing posts 30. When installing the fixed bearing, the fixing posts are inserted into the cylindrical holes, and then the cylindrical holes on the arc-shaped block are aligned with the fixing posts on the top of the fixed bearing. Finally, the cover plate is used to press and fix the fixed bearing. It should be noted that the shape of the arc-shaped block is adapted to the shape of the area formed by the top of the fixed bearing and the U-shaped notch, so as to better fix the fixed bearing and prevent the outer ring of the fixed bearing from rotating with the U-shaped notch when the grinding wheel rotates.

[0045] Furthermore, such as Figure 6 , 7 As shown, in order to clamp tubular steel components of different sizes, the clamping mechanism includes two L-shaped jaws. The horizontal portion of each jaw is inserted into the strip-shaped hole 2. A rack 32 is vertically arranged on the end face of the horizontal portion of each jaw. The two jaws are centrally symmetrically arranged. Each of the two jaws has a through hole 33 for the rack 32 on the other jaw to pass through. The through hole is designed to further reduce the distance between the two jaws, enabling the clamping of tubular steel components of more sizes. A gear 34 is arranged in the middle between the two racks 32. The gear 34 meshes with each rack 32. By driving the gear to rotate, the two jaws are driven to move towards or away from each other, thereby achieving the clamping and releasing of the tubular steel component. A transmission rod 35 is threaded through the center of the gear 34. Both ends of the transmission rod 35 are fixed by bearings. A dial 36 is sleeved and fixed on the transmission rod 35. Manually rotating the dial, in conjunction with the transmission rod, rotates the gear, thereby simultaneously driving the rack to move linearly. The handle 1 has a groove to accommodate the dial 36 and the transmission rod 35. Figure 2 The cross groove shown has a through hole 17 on the handle 1 for the dial wheel to extend out of the handle 1.

[0046] Furthermore, to facilitate the clamping of tubular steel components, the vertical portion of the gripper is a telescopic structure, preventing insufficient contact surface between the vertical portion and the tubular steel component, which could lead to unstable clamping. An extension groove is provided at the end face where the vertical portion 37 of the gripper connects to the horizontal portion. An extension plate 38 extending into the extension groove is provided on the horizontal portion of the gripper. To prevent the extension plate from detaching from the vertical portion, a magnetic sheet can be embedded in the extension plate. The vertical portion is made of metal or similarly has a magnetic block embedded in it, allowing the vertical portion and the extension plate to be magnetically fixed together. A concave rubber pad 18 is provided on the corresponding plate surface of the vertical portion 37 of the gripper to increase the friction of the tubular steel component.

[0047] Furthermore, when the steel component is not tubular but plate-shaped, the presence of the gripper makes it inconvenient for the grinding wheel to work. Therefore, the horizontal part of the gripper is designed to be rotatable. When the gripper is not needed, simply rotate the horizontal part of the gripper to move the vertical part away from the grinding wheel. Specifically, the horizontal part of the gripper includes a fixed plate 39 and a movable plate 40. The middle parts of the fixed plate 39 and the movable plate 40 are rotatably connected by a rotating shaft 41. That is, one end of the rotating shaft is fixed to the movable plate or the fixed plate by a bearing, and the other end is directly fixed to the fixed plate or the movable plate.

[0048] like Figure 6 , 7 As shown, to fix the movable plate and the fixed plate, a semi-threaded groove 42 is provided on the side of the fixed plate 39 adjacent to the movable plate 40, and a semi-threaded groove 42 is also provided on the side of the movable plate 40 adjacent to the fixed plate 39. When the movable plate 40 is rotated, the two semi-threaded grooves 42 are coaxially aligned and joined together after the fixed plate 39 and the movable plate 40 are spliced ​​to form a complete threaded hole. A threaded groove 43 corresponding to the semi-threaded groove 42 on the fixed plate 39 is provided on the rotating shaft 41. It should be noted that, in one embodiment, a semi-threaded groove is provided on the top of the fixed plate, while semi-threaded grooves are provided on the top and the two sides of the movable plate away from the top. Although the depth of the semi-threaded grooves on the two sides is different from the depth of the semi-threaded groove on the fixed plate, they can still combine with the semi-threaded groove on the fixed plate to form a complete threaded hole at the same height. The fixed plate and the movable plate can also be fixed by bolts, and the bolts are inserted into the threaded grooves 43 to fix the rotating shaft, the fixed plate, and the movable plate. According to the configuration of the present invention, the movable plate can be... Figure 6 , 7 In the indicated state, it can rotate 90° up / down. After the gripper rotates, it can also support the handle, making it more versatile.

[0049] Furthermore, slots 44 are provided on both sides of the handle 1 along its length, and support rods 45 are provided within the slots 44. One end of the support rod 45 is threaded, and a threaded hole is provided on the bottom surface of the handle 1, which is adapted to the threaded head. The position and number of threaded holes can be set as needed. The support rod 45 can be a self-locking telescopic rod, and the height of the handle 1 can be adjusted according to actual conditions. The slots 44 are mainly designed to facilitate the storage of the support rods 45, and multiple slots can be provided as needed.

[0050] When using this invention to inspect tubular steel components, unfold the vertical part of the gripper and adjust it to a suitable length using the extension plate to ensure the rubber pad fits against the outer wall of the component. When inspecting plate-shaped steel components, rotate the gripper 90° around the pivot and secure it with bolts to avoid the inspection area. Then, remove the support rod from the handle slot, screw the threaded end into the corresponding screw hole, adjust the length of the support rod, and self-lock it to ensure stable placement of the device (this part can be selected according to actual needs). Simultaneously, depending on the site conditions, the rotating gripper can also provide auxiliary support.

[0051] Then, rotating the dial drives the gear and rack transmission, causing the two L-shaped grippers to move synchronously towards each other, clamping and fixing the steel component to be tested, ensuring that the scraping mechanism is aligned with the area of ​​rust to be inspected, completing one positioning step. Next, manually fix the threaded sleeve, and rotate the screw plate to rotate the stud. This, through the threaded sleeve and connecting frame, drives the base plate to rise and fall, adjusting the grinding wheel to the working height for pressing the rust layer (to avoid the rust layer thickness exceeding the spring compression when the grinding wheel presses the rust layer, press directly to the maximum thickness, i.e., the limit block contacts the bottom of the limit groove). After height adjustment, slide the positioning ring down along the limit strip to the handle end face, insert the positioning pin to lock the stud, preventing loosening during operation. Simultaneously, the threaded sleeve can be rotated to adjust the grinding wheel's working angle to adapt to different inclination angles of the inspection surface. Then, turn on the laser displacement sensor, measure and record the distance between the sensor and the base plate as the initial distance, serving as the reference data for calculating the rust layer thickness. It should be noted that since the plate-shaped steel components cannot be used to fix the device of the present invention, after supporting it with the support rod, the worker who needs to inspect it should hold the handle, press the grinding wheel against the rust layer, and then keep it still.

[0052] The motor is started to drive the grinding wheel to rotate, scraping away the rust layer. The base plate, under the elastic force of a spring, causes the grinding wheel to float automatically. As the rust layer thins, the grinding wheel continuously adheres to the steel substrate until the rust layer is completely removed, exposing the metal surface (operators can visually inspect this or judge the removal progress by monitoring changes in the values ​​measured by a laser displacement sensor). The motor is then turned off, the grinding wheel stops rotating, and the final distance from the laser displacement sensor to the base plate is measured and recorded. The initial distance is subtracted from the final distance to obtain the rust layer thickness value, and the rust level of the steel component is determined based on a preset thickness range.

[0053] After the inspection is completed, when measuring tubular steel components, reverse the dial to release the clamps and remove the device. When measuring plate-shaped steel components, unscrew the support rod and store it in the slot. If the grinding wheel is worn, open the cover plate, quickly disassemble the fixed bearing and grinding wheel for replacement, and then store the device for later use.

[0054] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0055] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A device for detecting the degree of corrosion of steel components in tunnels, comprising a handle (1), characterized in that: A strip hole (2) is provided through one side of the handle (1). A clamping mechanism is provided in the strip hole (2). The clamping jaws of the clamping mechanism extend out of both sides of the handle (1) and are correspondingly arranged. A scraping mechanism is provided at one end of the handle (1). The scraping mechanism is located between the two clamping jaws. The scraping mechanism includes a base plate (3) and a grinding wheel (5) set on the base plate (3) through a bracket (4). The grinding wheel (5) is driven by a motor (6). A laser displacement sensor (7) is provided at one end of the handle (1). The laser displacement sensor (7) is located on the side of the scraping mechanism.

2. The device for detecting the degree of corrosion of tunnel steel components according to claim 1, characterized in that: The bottom of the base plate (3) is provided with a height adjustment mechanism. The height adjustment mechanism includes a screw sleeve (8) closed at one end and a stud (9) that extends into the screw sleeve (8) and is adapted thereto. The other end of the stud (9) is vertically arranged at the center of the end of the handle (1). A screw plate (10) is sleeved and fixed at the end of the stud (9) that extends out of the screw sleeve (8). At least two L-shaped connecting brackets (11) are arranged in the circumferential direction of the closed end of the screw sleeve (8). The other end of the connecting bracket (11) is fixed on the base plate (3).

3. The device for detecting the degree of corrosion of tunnel steel components according to claim 2, characterized in that: The other end of the stud (9) is fixed to the end of the handle (1) by a bearing. The stud (9) located below the screw plate (10) is a smooth section and a plurality of limiting strips (12) are provided on the smooth section along its axial direction. A positioning ring (13) is fitted on the smooth section of the stud (9). The inner ring of the positioning ring (13) is provided with a limiting notch that corresponds to and fits the limiting strips (12). The distance between the top of the limiting strip (12) and the screw plate (10) is greater than or equal to the thickness of the positioning ring (13). A positioning notch (15) is provided on the positioning ring (13). A positioning post (14) is detachably provided in the positioning notch (15).

4. A device for detecting the degree of corrosion of tunnel steel components according to claim 2 or 3, characterized in that: A horizontal plate (16) is provided below the base plate (3). A connecting shaft (19) is provided at the center of the horizontal plate (16). A groove (20) is provided on the top of the connecting shaft (19) along its axial direction. A connecting column (21) is provided at the bottom of the base plate (3) and extends into the groove (20). A spring (22) is provided between the bottom of the connecting column (21) and the bottom of the groove (20). A limit block (23) is provided on the circumferential direction of the bottom of the connecting column (21). A limit groove (24) corresponding to the limit block (23) is provided on the inner wall of the groove (20). The height difference between the limit groove (24) and the limit block (23) is the maximum extension and contraction of the base plate (3) in the axial direction of the connecting column (21). In the initial state, the limit block (23) is in contact with the top of the limit groove (24).

5. The device for detecting the degree of corrosion of tunnel steel components according to claim 4, characterized in that: The bottom of the base plate (3) is provided with an annular groove (25) around the connecting column (21). The top of the connecting shaft (19) extends into the annular groove (25). The distance between the top of the connecting shaft (19) and the top of the annular groove (25) is equal to the height difference between the limiting groove (24) and the limiting block (23).

6. The device for detecting the degree of corrosion of tunnel steel components according to claim 1, characterized in that: The top of the bracket (4) is provided with a U-shaped notch (26), and a fixed bearing (27) is provided inside the U-shaped notch (26). The shafts at both ends of the grinding wheel (5) extend into the fixed bearing (27) and are fixed. The top of the bracket (4) is provided with a cover plate (28), and the bottom of the cover plate (28) is provided with an arc-shaped block (29) that matches the outer ring of the fixed bearing (27), thereby pressing and fixing the fixed bearing (27).

7. The device for detecting the degree of corrosion of tunnel steel components according to claim 6, characterized in that: The fixed bearing (27) is provided with a fixed post (30) at the top and bottom, and the bottom of the U-shaped notch (26) and the bottom of the arc block (29) are respectively provided with cylindrical holes (31) that correspond to and fit the fixed post (30).

8. The device for detecting the degree of corrosion of tunnel steel components according to claim 1, characterized in that: The clamping mechanism includes two L-shaped jaws. The horizontal part of the jaws is inserted into the strip hole (2). A rack (32) is vertically arranged on the end face of the horizontal part of the jaws. The two jaws are arranged in a centrally symmetrical manner. The horizontal part of the two jaws is provided with a through hole (33) for the rack (32) on the other jaw to pass through. A gear (34) is provided in the middle between the two racks (32), and the gear (34) meshes with the two racks (32) respectively. A transmission rod (35) is provided through the center of the gear (34). The two ends of the transmission rod (35) are fixed by bearings. A dial wheel (36) is sleeved and fixed on the transmission rod (35). A groove is provided in the handle (1) to accommodate the dial wheel (36) and the transmission rod (35). A through hole (17) is provided on the handle (1) for the dial wheel to extend out of the handle (1).

9. The device for detecting the degree of corrosion of tunnel steel components according to claim 8, characterized in that: The vertical part of the gripper is a telescopic structure. The end face of the vertical part (37) of the gripper and the horizontal part is provided with an extension groove. The horizontal part of the gripper is provided with an extension plate (38) that extends into the extension groove. The corresponding plate surface of the vertical part (37) of the gripper is provided with a rubber pad (18) with a concave surface.

10. The device for detecting the degree of corrosion of tunnel steel components according to claim 1, characterized in that: The handle (1) has slots (44) on both sides along its length. A support rod (45) is provided in the slot (44). One end of the support rod (45) is a threaded head. The bottom surface of the handle (1) has a screw hole that is compatible with the threaded head.

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