High-strength anticorrosive steel grating anticorrosion detection device and method

Abstract

The application belongs to the technical field of steel grating detection, and particularly relates to a high-strength anticorrosion steel grating anticorrosion detection device and method, which comprises a base, a positioning seat fixed in an array on the top of the base, and a U-shaped support fixed on the top of the base, and further comprises: a gas cylinder fixed on the top of the U-shaped support, a rotating mechanism arranged on the moving end of the gas cylinder, and a moving mechanism arranged on the bottom of the rotating mechanism; and a detection mechanism arranged on the bottom moving end of the moving mechanism, which is used for comprehensively detecting the surface anticorrosion coating of the steel grating through the rotating mechanism and the moving mechanism. The bidirectional full-coverage detection is realized through cooperation of the rotating mechanism, the moving mechanism and the detection mechanism, the detection distance is accurately ensured through the distance calibration mechanism, the probe is automatically cleaned through the blowing mechanism, and the detection precision and efficiency are improved.

Description

Technical Field

[0001] This invention belongs to the field of steel grating testing technology, and in particular relates to a corrosion testing device and method for high-strength anti-corrosion steel grating. Background Technology

[0002] High-strength anti-corrosion steel grating is widely used in harsh corrosive environments such as chemical, municipal, port, and energy industries. The anti-corrosion performance of steel grating directly determines its service life and safety. Therefore, anti-corrosion testing must be carried out on high-strength anti-corrosion steel grating before it leaves the factory and is put into production.

[0003] Currently, the industry mainly uses magnetic thickness sensors to measure the thickness and quality of the anti-corrosion coating on the surface and around holes of high-strength anti-corrosion steel gratings for corrosion testing. However, in actual testing, the large size of high-strength anti-corrosion steel gratings leads to a significant increase in the area to be tested. Existing magnetic thickness sensors have relatively simple testing methods, mostly unidirectional scanning or single-point random testing, which are difficult to adapt to the large-area testing needs of steel gratings. They are also prone to forming blind spots in key areas such as flat steel intersections and hole edges, making it impossible to achieve full surface coverage without dead angles.

[0004] Therefore, a corrosion detection device and method for high-strength anti-corrosion steel grating are proposed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a high-strength anti-corrosion testing device and method for steel grating.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-strength anti-corrosion steel grating anti-corrosion testing device, comprising a base, wherein positioning seats are fixedly arranged in an array on the top of the base, and a U-shaped bracket is fixedly arranged on the top of the base, and further comprising: A cylinder is fixedly mounted on the top of the U-shaped bracket. The moving end of the cylinder is provided with a rotating mechanism, and the bottom of the rotating mechanism is provided with a moving mechanism. The inspection mechanism is located on the bottom moving end of the moving mechanism. The inspection mechanism performs a comprehensive inspection of the anti-corrosion coating on the surface of the steel grating through the rotating mechanism and the moving mechanism. An L-shaped telescopic rod is fixedly installed on the side wall of the rotating mechanism, and the vertical lower end of the L-shaped telescopic rod extends to one side of the steel grating. The rod wall of the L-shaped telescopic rod is provided with a distance calibration mechanism, which is used to measure the distance between the detection mechanism and the top of the steel grating. An air blowing mechanism is installed on the wall of the L-shaped telescopic rod, and the air blowing end of the air blowing mechanism extends to one side of the detection mechanism for dust removal from the detection end of the detection mechanism. The controller is fixedly installed at one of the top corners of the base, and the cylinder, rotating mechanism, moving mechanism, detection mechanism and distance calibration mechanism are all electrically connected to the controller.

[0007] Preferably, the rotating mechanism includes a fixed disk fixedly mounted on the moving end of the cylinder, a motor fixedly mounted on the lower surface of the fixed disk, and a rotating shaft fixedly mounted on the output end of the motor.

[0008] Preferably, the moving mechanism includes an electric slide rail fixedly disposed at the lower end of the rotating shaft, and an electric slider is adapted to be disposed inside the electric slide rail.

[0009] Preferably, the detection mechanism includes a mounting plate fixedly disposed at the bottom of the electric slider, and a plurality of uniformly distributed magnetic thickness sensors are fixedly disposed on the lower surface of the mounting plate.

[0010] Preferably, the L-shaped telescopic rod includes an L-shaped outer rod fixedly disposed on the side wall of the fixed plate, a straight inner rod at the lower end of the L-shaped outer rod, a piston fixedly disposed at the upper end of the straight inner rod, and the piston is slidably connected to the inner wall of the L-shaped outer rod. A spring is fixedly disposed between the top of the piston and the inner wall of the L-shaped outer rod.

[0011] Preferably, the distance calibration mechanism includes a first mounting plate fixedly disposed on the vertical part of the L-shaped outer rod, an infrared sensor fixedly disposed on the lower surface of the first mounting plate, a second mounting plate fixedly disposed at the lower end of the straight inner rod, and a reflector corresponding to the position of the infrared sensor fixedly disposed on the upper surface of the second mounting plate.

[0012] Preferably, the air blowing mechanism includes a first air blowing pipe fixedly disposed on the vertical part of the L-shaped outer rod, a second air blowing pipe fixedly disposed at the end of the first air blowing pipe, an air cavity provided inside the mounting plate, the end of the second air blowing pipe extending into the air cavity, and a plurality of third air blowing pipes fixedly disposed on the lower surface of the mounting plate.

[0013] Preferably, the first air blowing pipe has a return air pipe fixedly installed on its wall, and the return air pipe has a filter fixedly installed on its wall. The first air blowing pipe has a gas one-way valve fixedly installed on its wall. The second air blowing pipe is an elastic telescopic pipe. The third air blowing pipe has an L-shaped structure, and the end of the third air blowing pipe faces the detection end of the magnetic thickness sensor.

[0014] A method for testing the corrosion resistance of high-strength anti-corrosion steel grating includes the following steps: S1: Place the steel grating to be tested on top of the base and fix it in place using the positioning seat; S2: The controller controls the cylinder to extend, driving the rotating mechanism, moving mechanism and detection mechanism to move down synchronously. The distance calibration mechanism, together with the L-shaped telescopic rod, detects the distance between the detection mechanism and the top surface of the steel grating in real time. After the preset distance is reached, the controller controls the cylinder to stop moving. S3: During the retraction of the L-shaped telescopic rod, the air blowing mechanism is driven to automatically blow air to remove dust from the detection end of the detection mechanism; S4: The controller drives the moving mechanism to move the detection mechanism and complete the detection of the anti-corrosion coating of the longitudinal flat steel strips of the steel grating; S5: The controller controls the rotating mechanism to rotate 90°, which drives the moving mechanism and the detection mechanism to change direction. Then, the moving mechanism drives the detection mechanism to move, thus completing the detection of the anti-corrosion coating of the transverse flat steel strips of the steel grating. S6: After the single-sided inspection is completed, the controller controls the cylinder to retract and return to its original position. The inspector flips the steel grating over and repositions it. Repeat steps S2 to S5 to complete the double-sided anti-corrosion inspection of the steel grating.

[0015] Compared with existing technologies, the advantages of this invention are as follows: Through the design of a rotating mechanism, a moving mechanism, and a detection mechanism, the rotating mechanism drives the detection mechanism to achieve a 90° reversal. In conjunction with the moving mechanism, multiple sets of magnetic thickness sensors perform bidirectional composite scanning, enabling full coverage detection of the longitudinal and transverse flat steel bars on the surface of the steel grating. This effectively eliminates blind spots that are prone to occur, such as intersections of flat steel bars and edges of holes. Each magnetic thickness sensor covers 2-3 adjacent flat steel bars, reducing the number of magnetic thickness sensors while minimizing interference from voids, thus improving detection stability and efficiency. This meets the requirements for automated, high-precision, and blind-spot-free detection of large-area steel gratings.

[0016] By using a distance calibration mechanism, an infrared sensor and a reflector are combined with an L-shaped telescopic rod to detect the distance between the magnetic thickness sensor and the top surface of the steel grating. This keeps the distance between the magnetic thickness sensor and the top surface of the steel grating within a preset safe working range, ensuring that the magnetic thickness sensor is within the optimal magnetic field induction range and effectively preventing the magnetic thickness sensor from rubbing against weld points, edges, or protrusions, thus improving the detection effect of the equipment.

[0017] The air blowing mechanism utilizes the airflow generated when the L-shaped telescopic rod contracts. The airflow is then directed through the air chamber and multiple pipelines to the detection end of the magnetic thickness sensor. This process can remove dust, iron filings, debris, and other impurities from the probe surface in real time, preventing contaminants from affecting the accuracy of magnetic field sensing. This reduces detection errors at the source and improves the accuracy of coating thickness measurement. Attached Figure Description

[0018] Figure 1 This is a perspective view of the front of the high-strength anti-corrosion steel grating anti-corrosion testing device provided by the present invention; Figure 2This is a perspective view of the back of the high-strength anti-corrosion steel grating anti-corrosion testing device provided by the present invention; Figure 3 This is a perspective view of the positioning seat in the high-strength anti-corrosion steel grating anti-corrosion testing device provided by the present invention; Figure 4 This is a perspective view of the component on the moving end of the cylinder in the high-strength anti-corrosion steel grating anti-corrosion testing device provided by the present invention; Figure 5 This is a perspective view of the distance calibration mechanism in the high-strength anti-corrosion steel grating anti-corrosion detection device provided by the present invention; Figure 6 This is a perspective view of the L-shaped telescopic rod and the air blowing mechanism in the high-strength anti-corrosion steel grating anti-corrosion testing device provided by the present invention.

[0019] In the diagram: 1. Base; 2. Positioning seat; 3. U-shaped bracket; 4. Cylinder; 5. Rotating mechanism; 51. Fixed plate; 52. Motor; 53. Rotating shaft; 6. Moving mechanism; 61. Electric slide rail; 62. Electric slider; 7. Detection mechanism; 71. Mounting plate; 72. Magnetic thickness sensor; 8. L-shaped telescopic rod; 81. L-shaped outer rod; 82. Straight inner rod; 83. Piston; 84. Spring; 9. Distance calibration mechanism; 91. First mounting plate; 92. Infrared sensor; 93. Second mounting plate; 94. Reflector; 10. Air blowing mechanism; 101. First air blowing pipe; 102. Second air blowing pipe; 103. Air chamber; 104. Third air blowing pipe; 105. Return air pipe; 106. Filter; 107. Gas one-way valve; 11. Controller. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] like Figures 1-6 As shown, the high-strength anti-corrosion steel grating anti-corrosion testing device includes a base 1, with positioning seats 2 fixedly arranged in an array on the top of the base 1, and a U-shaped bracket 3 fixedly arranged on the top of the base 1. It also includes: Cylinder 4 is fixedly mounted on the top of U-shaped bracket 3. The moving end of cylinder 4 is provided with a rotating mechanism 5. The rotating mechanism 5 includes a fixed plate 51 fixedly mounted on the moving end of cylinder 4. A motor 52 is fixedly mounted on the lower surface of the fixed plate 51. A rotating shaft 53 is fixedly mounted on the output end of the motor 52. The motor 52 is a servo motor. The operation of the motor 52 can drive the rotating shaft 53 to rotate. The bottom of the rotating mechanism 5 is provided with a moving mechanism 6. The moving mechanism 6 includes an electric slide rail 61 fixedly mounted on the lower end of the rotating shaft 53. An electric slider 62 is adapted inside the electric slide rail 61.

[0022] The inspection mechanism 7 is located on the bottom moving end of the moving mechanism 6. The inspection mechanism 7 conducts a comprehensive inspection of the anti-corrosion coating on the surface of the steel grating through the rotating mechanism 5 and the moving mechanism 6. The inspection mechanism 7 includes a mounting plate 71 fixedly installed at the bottom of the electric slider 62. Multiple evenly distributed magnetic thickness sensors 72 are fixedly installed on the lower surface of the mounting plate 71. The magnetic thickness sensors 72 are fixedly installed between the mounting plate 71 and the magnetic thickness sensors 72 by screws, which facilitates the subsequent disassembly and maintenance.

[0023] An L-shaped telescopic rod 8 is fixedly mounted on the side wall of the rotating mechanism 5, with its vertical lower end extending to one side of the steel grating. The L-shaped telescopic rod 8 includes an L-shaped outer rod 81 fixedly mounted on the side wall of the fixed plate 51. A straight inner rod 82 is provided at the lower end of the L-shaped outer rod 81, and a piston 83 is fixedly mounted at the upper end of the straight inner rod 82. The piston 83 is slidably connected to the inner wall of the L-shaped outer rod 81. A spring 84 is fixedly mounted between the top of the piston 83 and the inner wall of the L-shaped outer rod 81, forming a gas storage space. Gas can be expelled by moving the piston 83 upwards, and gas can be drawn in by moving the piston 83 downwards. A distance calibration mechanism 9 is provided on the rod wall of the L-shaped telescopic rod 8, and the distance calibration mechanism 9 is used to measure the distance between the top of the detection mechanism 7 and the top of the steel grating. The distance calibration mechanism 9 includes a first mounting plate 91 fixedly mounted on the vertical part of the L-shaped outer rod 81. An infrared sensor 92 is fixedly mounted on the lower surface of the first mounting plate 91. A second mounting plate 93 is fixedly mounted on the lower end of the inner rod 82. A reflector 94 corresponding to the position of the infrared sensor 92 is fixedly mounted on the upper surface of the second mounting plate 93. The second mounting plate 93 is made of plastic. The second mounting plate 93 partially contacts the top side of the steel grating. After contact, it remains stationary relative to the steel grating, which can avoid squeezing and abrading the top of the steel grating. The infrared sensor 92 continuously emits a detection beam, which shines on the reflector 94. The actual distance between the magnetic thickness sensor 72 and the top surface of the steel grating is calculated and obtained in real time through the signal fed back by the reflection of the beam.

[0024] An air blowing mechanism 10 is mounted on the wall of the L-shaped telescopic rod 8, and the air blowing end of the air blowing mechanism 10 extends to one side of the detection mechanism 7 for dust removal from the detection end of the detection mechanism 7. The air blowing mechanism 10 includes a first air blowing pipe 101 fixedly mounted on the vertical part of the L-shaped outer rod 81, a second air blowing pipe 102 fixedly mounted at the end of the first air blowing pipe 101, an air chamber 103 inside the mounting plate 71, the end of the second air blowing pipe 102 extending into the air chamber 103, and a plurality of third air blowing pipes 104 fixedly mounted on the lower surface of the mounting plate 71. A return air pipe 105 is fixedly mounted on the wall of the first air blowing pipe 101, and a filter 106 is fixedly mounted on the wall of the return air pipe 105. A gas one-way valve 107 is fixedly mounted on the wall of the first air blowing pipe 101. The gas inside the L-shaped outer rod 81 is allowed to enter the second air blowing pipe 102 and the third air blowing pipe 104, preventing external gas from flowing back through the third air blowing pipe 104 during reset. The second air blowing pipe 102 is an elastic telescopic pipe, which not only ensures gas passage but also allows the second air blowing pipe 102 to freely extend and retract with the movement of the magnetic thickness sensor 72. The third air blowing pipe 104 adopts an L-shaped structure, and the end of the third air blowing pipe 104 faces the detection end of the magnetic thickness sensor 72. When the piston 83 moves under the action of elastic force, it will draw in the gas inside the first air blowing pipe 101 and the return air pipe 105, so that the L-shaped outer rod 81 is filled with gas again. The filter 106 can filter the gas entering from the outside to ensure the cleanliness of the gas blown to the detection end of the magnetic thickness sensor 72 next time.

[0025] The controller 11 is fixedly installed at one corner of the top of the base 1. The cylinder 4, the rotating mechanism 5, the moving mechanism 6, the detection mechanism 7 and the distance calibration mechanism 9 are all electrically connected to the controller 11.

[0026] The operating principle of the present invention is described as follows: The testing personnel first place the high-strength anti-corrosion steel grating to be tested stably on the top of the base 1, and complete the positioning of the steel grating through the preset positioning seat 2 to ensure that the steel grating does not shift or deviate during the testing process, thus providing a basic guarantee for the accuracy of subsequent testing. Subsequently, the inspector issued a start command through the controller 11. Upon receiving the signal, the cylinder 4 drove the piston rod to extend, simultaneously causing the mounting plate 71 and the multiple magnetic thickness sensors 72 arranged at its bottom to descend vertically. At the same time, the L-shaped telescopic rod 8, which is linked to the mounting plate 71, also moved downwards. During the descent, the lower surface of the second mounting piece 93 at the lower end of the L-shaped telescopic rod 8 first came into contact with the top side of the steel grating. Under the continuous downward force, the second mounting piece 93 pushed the inner rod 82 to retract into the L-shaped outer rod 81, causing the distance between the first mounting piece 91 and the second mounting piece 93 to gradually decrease. During this distance adjustment process, the infrared sensor 92, which is at the same height as the magnetic thickness sensors 72, continuously emitted a detection beam. The beam shone on the reflector 94, and the actual distance between the magnetic thickness sensor 72 and the top surface of the steel grating was calculated and obtained in real time through the signal feedback from the beam reflection. The distance data was then combined with... The data is transmitted to the controller 11. Since the second mounting plate 93 and the reflector 94 have a certain thickness, the controller 11 will automatically compensate for the thickness difference between the two when the infrared sensor 92 is measuring the distance. This makes the distance detection between the magnetic thickness sensor 72 and the steel grating more accurate. When the detection distance is close to the preset 20mm safety threshold, the controller 11 will automatically issue a stop command and the cylinder 4 will stop extending. This distance not only provides sufficient safety clearance, which can effectively avoid the magnetic thickness sensor 72 from scratching and interfering with the weld points, edges, local protrusions and burrs on the surface of the steel grating, but is also within the effective sensing range of the magnetic thickness sensor 72, which can ensure stable transmission of magnetic field signal and significantly reduce interference problems such as signal loss and data jump caused by the hollow holes. It should be noted that even if there are slight height differences in the production process of the same type of steel grating, the detection distance can be determined through the real-time detection of the infrared sensor and the adaptive adjustment of the cylinder 4. During the synchronous process of calibrating and adjusting the detection spacing, when the straight inner rod 82 retracts into the L-shaped outer rod 81, it will drive the piston 83 inside the rod to move upward and compress the internally preset spring 84. At the same time, the pressure generated by the piston 83 will force the compressed gas inside the L-shaped outer rod 81 into the connected first air blowing pipe 101 and second air blowing pipe 102. After the air flow is combined through the air chamber 103, it will be blown directionally to the detection end of the corresponding multiple magnetic thickness sensors 72 through multiple third air blowing pipes 104 evenly distributed at the bottom of the air chamber 103. The compressed air flow can quickly blow away the floating dust, iron filings and other debris attached to the surface of the detection end of the magnetic thickness sensor 72, avoid the attachments from interfering with the magnetic field sensing accuracy, provide a clean detection environment for subsequent anti-corrosion coating thickness detection, and further improve the accuracy and reliability of the detection data. Although the air pressure is small in this blowing process, it is sufficient to remove floating dust and slight iron filings from the surface of the detection end of the magnetic thickness sensor 72. After the detection spacing is calibrated and the magnetic thickness sensors 72 are cleaned, the controller 11 automatically starts the electric slider 62 inside the electric slide rail 61. The electric slider 62 moves smoothly along the electric slide rail 61, synchronously driving the mounting plate 71 and multiple magnetic thickness sensors 72 at the bottom to perform a lateral scanning motion. During the longitudinal movement, the multiple magnetic thickness sensors 72 achieve full coverage detection of the anti-corrosion coating of the longitudinally distributed flat steel strips on the surface of the steel grating. Each magnetic thickness sensor 72 covers three adjacent longitudinal flat steel strips. By reasonably distributing the detection area, the proportion of voids within the detection range of a single magnetic thickness sensor 72 is reduced, thus reducing void interference from the source. When the longitudinal flat steel strips have been detected... After completion, the controller 11 immediately starts the motor 52. The motor 52 rotates the rotating shaft 53 by 90°, which in turn drives the electric slide rail 61 and the mounting plate 71 below to rotate synchronously by 90°, switching the originally horizontally arranged mounting plate 71 and multiple magnetic thickness sensors 72 to a vertically arranged state. Subsequently, the controller 11 starts the electric slider 62 again. The electric slider 62 moves along the electric slide rail 61, driving multiple magnetic thickness sensors 72 to perform a horizontal scan, completing a comprehensive inspection of the anti-corrosion coating of the horizontally distributed flat steel strips on the surface of the steel grating. It should be noted that, since the steel grating has a cuboid structure, its vertical detection length is greater than its horizontal detection length. To avoid the edge magnetic thickness sensors 72 exceeding the detection length, the vertical detection length is adjusted accordingly. Invalid data may result from the steel grating detection range. During transverse detection, the controller 11 automatically shuts down the magnetic thickness sensors 72 at both ends of the mounting plate 71, keeping only the magnetic thickness sensors 72 within the corresponding transverse width range of the steel grating operational to ensure the validity of the detection data. After the magnetic thickness sensors 72 rotate 90° for detection, the controller 11 automatically reverses the rotation to reset them, preventing entanglement of wiring and pipes. The entire detection process employs a bidirectional composite scanning mode, combining longitudinal and transverse scanning, along with a zoned coverage design using multiple magnetic thickness sensors 72. This achieves comprehensive coverage of all longitudinal and transverse flat steel strips on the steel grating surface, especially for flat steel. Key areas that are easily missed by unidirectional scanning, such as intersections and hole edges, are ensured to be fully covered by bidirectional repeated detection, completely eliminating blind spots. At the same time, the scanning paths in different directions can offset the influence of magnetic field edge distortion at the edges of the flat steel of the steel grating and the intersection weld points. When detecting in a single direction, the magnetic field distortion at the edges can easily lead to local data deviations, while bidirectional data cross-comparison can correct such deviations and improve detection accuracy. Moreover, bidirectional scanning can further filter abnormal signals caused by voids. When the magnetic thickness sensor 72 accidentally misses a void during a single-direction scan, the scanning data in the other direction can serve as an effective supplement and verification, greatly suppressing false detections and improving data reliability. After all the anti-corrosion coating inspection work on the upper surface of the steel grating is completed, the controller 11 automatically issues a reset command, controlling the cylinder 4 to drive the piston rod to retract, smoothly lifting and resetting the mounting plate 71 and the multiple magnetic thickness sensors 72 below it. At the same time, in conjunction with the mechanism, the second mounting piece 93 at the lower end of the L-shaped telescopic rod 8 smoothly separates from the upper surface of the steel grating, completely disengaging from contact. After the sensors are lifted into place and the mechanism is fully reset and cleared, the inspectors can smoothly remove the steel grating that has completed single-sided inspection from between the positioning seats 2, flip the steel grating over, and then place it back into the positioning seat 2 for limit positioning. The aforementioned spacing calibration, probe air cleaning, and horizontal and vertical bidirectional scanning inspection process are repeated to comprehensively inspect the thickness and quality of the anti-corrosion coating on the other side of the steel grating, achieving complete anti-corrosion inspection on both sides of the steel grating without any omissions, ensuring the comprehensiveness and reliability of the overall anti-corrosion quality assessment.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-strength anti-corrosion steel grating anti-corrosion testing device, comprising a base (1), wherein positioning seats (2) are fixedly arranged in an array on the top of the base (1), and a U-shaped bracket (3) is fixedly arranged on the top of the base (1), characterized in that, Also includes: A cylinder (4) is fixedly mounted on the top of the U-shaped bracket (3). The moving end of the cylinder (4) is provided with a rotating mechanism (5), and the bottom of the rotating mechanism (5) is provided with a moving mechanism (6). The testing mechanism (7) is located on the bottom moving end of the moving mechanism (6). The testing mechanism (7) performs a comprehensive inspection of the anti-corrosion coating on the surface of the steel grating through the rotating mechanism (5) and the moving mechanism (6). L-shaped telescopic rod (8) is fixedly installed on the side wall of the rotating mechanism (5), and the vertical lower end of the L-shaped telescopic rod (8) extends to one side of the steel grating. The rod wall of the L-shaped telescopic rod (8) is provided with a distance calibration mechanism (9), and the distance calibration mechanism (9) is used to measure the distance between the detection mechanism (7) and the top of the steel grating. An air blowing mechanism (10) is provided on the wall of the L-shaped telescopic rod (8), and the air blowing end of the air blowing mechanism (10) extends to one side of the detection mechanism (7) for dust removal from the detection end of the detection mechanism (7). The controller (11) is fixedly installed at one corner of the top of the base (1). The cylinder (4), the rotating mechanism (5), the moving mechanism (6), the detection mechanism (7) and the distance calibration mechanism (9) are all electrically connected to the controller (11).

2. The high-strength anti-corrosion steel grating anti-corrosion testing device according to claim 1, characterized in that, The rotating mechanism (5) includes a fixed disk (51) fixedly mounted on the moving end of the cylinder (4), a motor (52) fixedly mounted on the lower surface of the fixed disk (51), and a rotating shaft (53) fixedly mounted on the output end of the motor (52).

3. The high-strength anti-corrosion steel grating anti-corrosion testing device according to claim 2, characterized in that, The moving mechanism (6) includes an electric slide rail (61) fixedly disposed at the lower end of the rotating shaft (53), and an electric slider (62) is adapted inside the electric slide rail (61).

4. The high-strength anti-corrosion steel grating anti-corrosion testing device according to claim 3, characterized in that, The detection mechanism (7) includes a mounting plate (71) fixedly disposed at the bottom of the electric slider (62), and a plurality of uniformly distributed magnetic thickness sensors (72) are fixedly disposed on the lower surface of the mounting plate (71).

5. The high-strength anti-corrosion steel grating anti-corrosion testing device according to claim 4, characterized in that, The L-shaped telescopic rod (8) includes an L-shaped outer rod (81) fixedly installed on the side wall of the fixed plate (51). The lower end of the L-shaped outer rod (81) is provided with a straight inner rod (82). The upper end of the straight inner rod (82) is fixedly provided with a piston (83), and the piston (83) is slidably connected to the inner wall of the L-shaped outer rod (81). A spring (84) is fixedly provided between the top of the piston (83) and the inner wall of the L-shaped outer rod (81).

6. The high-strength anti-corrosion steel grating anti-corrosion testing device according to claim 5, characterized in that, The distance calibration mechanism (9) includes a first mounting plate (91) fixedly mounted on the vertical part of the L-shaped outer rod (81), an infrared sensor (92) fixedly mounted on the lower surface of the first mounting plate (91), a second mounting plate (93) fixedly mounted at the lower end of the straight inner rod (82), and a reflector (94) corresponding to the position of the infrared sensor (92) fixedly mounted on the upper surface of the second mounting plate (93).

7. The high-strength anti-corrosion steel grating anti-corrosion testing device according to claim 6, characterized in that, The air blowing mechanism (10) includes a first air blowing pipe (101) fixedly installed on the vertical part of the L-shaped outer rod (81), a second air blowing pipe (102) fixedly installed at the end of the first air blowing pipe (101), an air cavity (103) is provided inside the mounting plate (71), the end of the second air blowing pipe (102) extends into the air cavity (103), and a plurality of third air blowing pipes (104) are fixedly installed on the lower surface of the mounting plate (71).

8. The high-strength anti-corrosion steel grating anti-corrosion testing device according to claim 7, characterized in that, The first air blowing pipe (101) has a return air pipe (105) fixedly installed on its pipe wall, and a filter (106) fixedly installed on the pipe wall of the return air pipe (105). The first air blowing pipe (101) has a gas one-way valve (107) fixedly installed on its pipe wall. The second air blowing pipe (102) is an elastic telescopic pipe. The third air blowing pipe (104) adopts an L-shaped structure, and the end of the third air blowing pipe (104) faces the detection end of the magnetic thickness sensor (72).

9. A method for detecting the corrosion resistance of high-strength anti-corrosion steel grating using the anti-corrosion testing device for high-strength anti-corrosion steel grating as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: Place the steel grating to be tested on top of the base (1) and fix it in place by using the positioning seat (2); S2: The controller (11) controls the cylinder (4) to extend, driving the rotating mechanism (5), moving mechanism (6) and detection mechanism (7) to move down synchronously. The distance calibration mechanism (9) cooperates with the L-shaped telescopic rod (8) to detect the distance between the detection mechanism (7) and the top surface of the steel grating in real time. After the preset distance is reached, the controller (11) controls the cylinder (4) to stop moving. S3: During the retraction of the L-shaped telescopic rod (8), the blowing mechanism (10) is driven to operate and automatically blow air to remove dust from the detection end of the detection mechanism (7); S4: The controller (11) drives the moving mechanism (6) to move, thereby moving the detection mechanism (7) to complete the anti-corrosion coating detection of the longitudinal flat steel strips of the steel grating; S5: The controller (11) controls the rotating mechanism (5) to rotate 90°, which drives the moving mechanism (6) and the detection mechanism (7) to change direction. Then, the moving mechanism (6) drives the detection mechanism (7) to move, thus completing the anti-corrosion coating detection of the transverse flat steel strips of the steel grating. S6: After the single-sided inspection is completed, the controller (11) controls the cylinder (4) to retract and return to its original position. The inspector flips the steel grating over and repositions it. Repeat steps S2 to S5 to complete the double-sided anti-corrosion inspection of the steel grating.

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