Steel structure corrosion damage detection device and use method thereof

Abstract

The invention relates to the technical field of steel structures, in particular to a steel structure corrosion damage detection device and a using method thereof.The steel structure corrosion damage detection device comprises a detection mechanism, the detection mechanism comprises an ultrasonic detector, an ultrasonic probe cable is inserted into one side of the ultrasonic detector, and a detection mechanism is arranged at one end of the ultrasonic probe cable; the detection mechanism comprises an outer protective shell, a power assembly is connected to the inner side of the upper end of the outer protective shell, a transmission assembly is connected to the inner side of the outer protective shell, a second fixing rod is rotationally arranged on the inner side of the transmission assembly, and a liquid conveying assembly is connected to the interior of the outer protective shell along the transmission assembly in a surrounding mode. An ultrasonic detection head is connected into the lower end of the second fixing rod. According to the device, the motor is started to drive the transmission assembly to rotate, the scraping rod rotates and cooperates with an oil stain dissolving solution conveyed by the output pipe, the oil stain removing effect is achieved, and therefore the damage degree of the steel structure is judged.

Description

Technical Field

[0001] This invention relates to the field of steel structure technology, and in particular to a steel structure corrosion damage detection device and its usage method. Background Technology

[0002] Corrosion damage detection of steel structures is a technical means to comprehensively inspect and evaluate corrosion caused by environmental factors. The core is to determine the degree of corrosion, the scope of influence, and the harm to structural safety, thereby determining the location, area, and depth of corrosion, clarifying the damage distribution pattern, and providing data support for structural repair, reinforcement, or replacement by assessing the degree of weakening of the steel structure's cross-sectional dimensions and mechanical properties, thus ensuring safe use.

[0003] When inspecting steel structures for rust damage, ultrasonic testing devices are used. However, when using ultrasonic testing devices to inspect steel structures, if there is oil on the surface of the part of the steel structure being inspected by the probe, the uneven thickness of the oil layer will cause the ultrasonic waves to be reflected prematurely, forming noise waves that interfere with the identification of the true defect signal, resulting in detection errors and affecting the staff's judgment of the steel structure damage. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides the following technical solution: According to one aspect of the present invention, a steel structure corrosion damage detection device is provided, comprising: The testing mechanism includes an ultrasonic detector, an ultrasonic probe cable inserted into one side of the ultrasonic detector, and a detection mechanism provided at one end of the ultrasonic probe cable. The detection mechanism includes an outer protective shell. A power component is connected to the inner side of the upper end of the outer protective shell. A transmission component is connected to the inner side of the outer protective shell. A fixing rod is rotatably mounted on the inner side of the transmission component. A liquid delivery component is connected around the transmission component inside the outer protective shell. An ultrasonic probe is connected to the inner side of the lower end of the fixing rod. One end of the ultrasonic probe is fixedly connected to one end of an ultrasonic probe cable. A connecting component is provided on the outer side of the lower end of the transmission component. One end of the connecting component is connected to a cleaning component.

[0005] As an improvement to the above technical solution, a fixing shell is fixed to the outer surface of the upper end of the ultrasonic detector. A handle is connected to one side of the fixing shell. A limit ring is connected to the inner side of the outer protective shell. A battery is installed inside the handle. One end of the fixing rod is connected to the inner wall of the upper end of the outer protective shell.

[0006] As an improvement to the above technical solution, the power assembly includes a motor, a transmission rod, and a gear. The outer surface of the motor is connected to the inner side of the fixed housing. One end of the transmission rod is connected to the drive end of the motor. The transmission rod penetrates the outer protective housing and extends into the interior of the outer protective housing. The gear is fixed to the end of the transmission rod inside the outer protective housing.

[0007] As an improvement to the above technical solution, the transmission component includes a rotating disk and a hollow rotating rod. The upper and lower sides of the rotating disk rotate on one side of a limiting ring. The upper end of the rotating disk has a ring array of teeth. The lower end of the rotating disk is connected to a triangular extrusion plate one. The upper end of the hollow rotating rod is connected to the bottom side of the rotating disk. The outer surface of the upper end of the rotating disk is connected to a triangular extrusion plate two, which meshes with a gear. The bottom of the fixed rod two is connected to a circular shell. The inside of the circular shell is connected to the outer side of the upper end of the ultrasonic probe. The lower end of the hollow rotating rod is rotatably connected to the outer side of the circular shell.

[0008] As an improvement to the above technical solution, the liquid delivery assembly includes a storage tank, an empty pipe, a cylindrical tank, and an output pipe. The storage tank is internally connected to the storage tank, the outer surface of the storage tank is connected to the interior of the ultrasonic detector, the outer side of the storage tank is connected to a material channel, the material channel penetrates the outer protective shell and extends to the outside of the outer protective shell, the outer surface of the cylindrical tank is connected to the interior of the outer protective shell, and both ends of the empty pipe are connected to the storage tank and the cylindrical tank.

[0009] As an improvement to the above technical solution, a plunger slides inside the cylindrical tank, a tension rod is fixed to the upper end of the plunger, a compression block is connected to the upper end of the tension rod, and one end of the output pipe passes through the outer protective shell and is connected to the cylindrical tank.

[0010] As an improvement to the above technical solution, the connecting assembly includes a spring telescopic rod, a locking plate, a cross-shaped locking block, a second rotating rod, and a connecting rod. One end of the spring telescopic rod is connected to the outside of the hollow rotating rod, one end of the second rotating rod rotates inside the hollow rotating rod, one end of the spring telescopic rod is connected to one side of the locking plate, one end of the cross-shaped locking block is connected to one end of the second rotating rod, the cross-shaped locking block is inserted into the slot of the locking plate, and the inside of the upper end of the connecting rod is connected to the outer surface of the second rotating rod.

[0011] As an improvement to the above technical solution, the cleaning assembly includes a circular ring plate, a rotating rod, a rotating plate, a scraping rod, and a sponge. The upper side of the circular ring plate is connected to the bottom end of the connecting rod. The outer ring of the circular ring plate has a through hole, and the inner ring of the circular ring plate has an annular groove. The inner side of the circular ring plate is connected to a guide plate.

[0012] As an improvement to the above technical solution, the two ends of the rotating rod rotate inside the annular plate, the interior of the rotating plate is fixed to the outer surface of the rotating rod, one end of the rotating plate is connected to a scraping rod, and the other end of the rotating plate is connected to a sponge.

[0013] According to another aspect of the present invention, a method for detecting corrosion damage in steel structures is also provided, the method comprising: The ultrasonic detector transmits signals via the ultrasonic probe cable, controlling the power unit to start transmitting power, which in turn drives the transmission component to rotate. This power, in turn, drives the connecting component to rotate, which in turn drives the cleaning component to rotate, cleaning oil stains from the steel structure surface. Simultaneously, the rotation of the transmission component transports the solution inside the liquid delivery component to one side of the cleaning component, working in conjunction with the rotation of the cleaning component to remove oil stains. Then, the ultrasonic detector controls the ultrasonic probe to emit ultrasonic waves to probe the interior of the steel structure and collect the reflected ultrasonic waves. The collected ultrasonic data is displayed on the ultrasonic detector's screen, allowing staff to assess the extent of damage to the steel structure.

[0014] The beneficial effects of this invention are: The start-up motor drives the transmission component to rotate, which in turn drives the connecting component to rotate, thereby rotating the scraping rod to scrape away the oil stains on the surface of the steel structure to be inspected. At the same time, the oil-dissolving liquid delivered by the output pipe works in conjunction with the scraping rod to further remove the oil stains, avoiding errors in the ultrasonic data transmitted back due to oil stains, which would affect the staff's judgment of the degree of damage to the steel structure. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the ultrasonic detector of the present invention; Figure 3 This is a diagram showing the connection relationship of the outer protective shell of the present invention; Figure 4 This is a cross-sectional view of the outer protective shell of the present invention; Figure 5 This is a connection diagram of the transmission components of the present invention; Figure 6 This is a diagram showing the connection relationship of the second triangular extrusion plate of the present invention; Figure 7 This is a cross-sectional view of the liquid delivery assembly of the present invention; Figure 8 This is a connection diagram of the connection components of the present invention; Figure 9 This is a connection diagram of the cleaning components of the present invention; Figure 10 This is a diagram showing the positional relationship of the rotating rod in this invention; Figure 11 This is a diagram showing the positional relationship of the sponge of the present invention.

[0016] Attached label: 10, Testing institution; 11. Ultrasonic detector; 12. Ultrasonic probe cable; 20. Detection mechanism; 21. Outer protective shell; 211. Fixed shell one; 212. Handle; 213. Limiting ring; 22. Battery; 23. Power assembly; 231. Motor; 232. Transmission rod one; 233. Gear; 24. Transmission assembly; 241. Rotating disk; 2411. Tooth; 2412. Triangular extrusion plate one; 242. Hollow rotating rod; 2421. Triangular extrusion plate two; 25. Fixed rod two; 251. Circular shell; 26. Liquid conveying assembly; 261. Storage tank; 2611. Feed channel; 262. Empty pipe; 263. Cylindrical tank; 2631. Plunger; 2632. Tensioning rod; 2633. Extrusion block; 264. Output pipe; 27. Ultrasonic probe; 28. Connecting assembly; 281. Elastic telescopic rod; 282. Clamping plate; 283. Cross-shaped clamping block; 284. Rotating rod two; 285. Connecting rod; 29. Cleaning component; 291. Circular plate; 2911. Circular groove; 2912. Through hole; 2913. Guide plate; 292. Rotating rod; 293. Rotating plate; 294. Scraping rod; 295. Sponge. Detailed Implementation

[0017] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0018] In existing steel structure corrosion damage detection devices that use ultrasonic waves, the uneven thickness of the oil layer on the surface of the steel structure being detected by the probe can cause premature reflection of ultrasonic waves, creating noise that interferes with the identification of true defect signals. This leads to detection errors and affects the operator's assessment of the steel structure damage. To address the above problems, the following implementation method is provided: Example 1

[0019] See appendix Figures 1-11 As shown, to solve the above-mentioned technical problems, a steel structure corrosion damage detection device is provided, comprising: The detection mechanism 10 includes an ultrasonic detector 11. An ultrasonic probe cable 12 is inserted into one side of the ultrasonic detector 11. A detection mechanism 20 is provided at one end of the ultrasonic probe cable 12. The detection mechanism 20 includes an outer protective shell 21. A power component 23 is connected to the inner side of the upper end of the outer protective shell 21. A transmission component 24 is connected to the inner side of the outer protective shell 21. A fixing rod 25 is rotatably connected to the inner side of the transmission component 24. A liquid delivery component 26 is connected around the transmission component 24 inside the outer protective shell 21. An ultrasonic probe head 27 is connected to the inner side of the lower end of the fixing rod 25. One end of the ultrasonic probe head 27 is fixedly connected to one end of the ultrasonic probe cable 12. A connecting component 28 is provided on the outer side of the lower end of the transmission component 24. A cleaning component 29 is connected to one end of the connecting component 28.

[0020] Before testing, the oil-dissolving solution inside the liquid delivery assembly 26 is replenished. The position of the cleaning assembly 29 is adjusted by the connecting assembly 28 so that the cleaning assembly 29 and the connecting assembly 28 are on the same horizontal plane. One side of the cleaning assembly 29 is attached to the part of the steel structure to be tested. By controlling the switch on the surface of the ultrasonic detector 11, a signal is transmitted through the ultrasonic probe cable 12 to control the start of the power assembly 23. The transmitted power drives the transmission assembly 24 to rotate. When the transmission assembly 24 rotates, the compression tension rod 2632 drives the plunger 2631 inside the cylindrical tank 263 to move, allowing the plunger 2631 to send the solution inside the cylindrical tank 263 out through the output pipe 264 and transfer it to the surface of one side of the cleaning assembly 29. At the same time, when the transmission assembly 24 rotates, it drives the connecting assembly 28 to rotate, thereby driving the cleaning assembly 29 to rotate. Simultaneously, personnel flow down the surface of one side of the cleaning assembly 29 from above, effectively removing the oil stains from the steel structure surface.

[0021] When the cleaning is complete, the ultrasonic detector 11 transmits a signal through the ultrasonic probe cable 12 to control the ultrasonic probe head 27 to emit ultrasonic waves. When the ultrasonic waves come into contact with the damaged parts inside the steel structure, they are reflected. The ultrasonic probe head 27 captures these reflected ultrasonic waves and transmits them to the ultrasonic detector 11 through the ultrasonic probe cable 12. The ultrasonic detector 11 analyzes them and generates corresponding data that is displayed on the screen on the surface of the ultrasonic detector 11.

[0022] See Figure 3 , Figure 4An ultrasonic detector 11 has a fixed housing 211 fixed on its upper outer surface. A handle 212 is connected to one side of the fixed housing 211. A limit ring 213 is connected to the inner side of the outer protective shell 21. A battery 22 is installed inside the handle 212. One end of a fixed rod 25 is connected to the inner wall of the upper part of the outer protective shell 21. The power assembly 23 includes a motor 231, a transmission rod 232, and a gear 233. The outer surface of the motor 231 is connected to the inner side of the fixed housing 211. One end of the transmission rod 232 is connected to the drive end of the motor 231. The transmission rod 232 passes through the outer protective shell 21 and extends into the interior of the outer protective shell 21. The gear 233 is fixed to the end of the transmission rod 232 inside the outer protective shell 21.

[0023] The fixed housing 211 is used to protect and fix the motor 231, and the handle 212 is used to protect the internal battery 22 and allow the operator to hold and use it. The battery 22 provides power to the power component 23, ensuring that the power component 23 can be used for a long time. When the motor 231 starts, it drives the transmission rod 232 to rotate, which in turn drives the gear 233 to rotate, thereby generating power and transmitting it. The limit ring 213 is used to make the rotating disk 241 rotate smoothly.

[0024] See Figures 4-6 The transmission component 24 includes a rotating disk 241 and a hollow rotating rod 242. The upper and lower sides of the rotating disk 241 rotate on one side of the limiting ring 213. The upper end of the rotating disk 241 has a ring array of teeth 2411. The lower end of the rotating disk 241 is connected to a triangular extrusion plate 2412. The upper end of the hollow rotating rod 242 is connected to the bottom side of the rotating disk 241. The outer surface of the upper end of the rotating disk 241 is connected to a triangular extrusion plate 2421. The triangular extrusion plate 2421 meshes with a gear 233. The bottom of the fixed rod 25 is connected to a circular shell 251. The inside of the circular shell 251 is connected to the outer side of the upper end of the ultrasonic probe head 27. The lower end of the hollow rotating rod 242 is rotatably connected to the outer side of the circular shell 251.

[0025] When gear 233 rotates, it drives teeth 2411 to rotate through meshing, thereby driving rotating disk 241 to rotate, which in turn drives triangular compression plate 2412 to rotate. When rotating disk 241 rotates, it drives hollow rotating rod 242 to rotate, which in turn drives triangular compression plate 2421 to rotate. Fixing rod 25 is fixed inside the outer protective shell 21 to protect the ultrasonic probe cable 12. At the same time, the outer surface of fixing rod 25 passes through rotating disk 241 and hollow rotating rod 242 to avoid affecting the rotation of rotating disk 241 and hollow rotating rod 242, while ensuring that ultrasonic probe cable 12 is connected to ultrasonic probe head 27.

[0026] See Figures 4-7The liquid delivery assembly 26 includes a storage tank 261, an empty pipe 262, a cylindrical tank 263, and an output pipe 264. The storage tank 261 is internally connected, and the outer surface of the storage tank 261 is connected to the interior of the ultrasonic detector 11. The outer side of the storage tank 261 is connected to a material channel 2611, which penetrates the outer protective shell 21 and extends to the outside of the outer protective shell 21. The outer surface of the cylindrical tank 263 is connected to the interior of the outer protective shell 21. Both ends of the empty pipe 262 are connected to the storage tank 261 and the cylindrical tank 263. A plunger 2631 slides inside the cylindrical tank 263. A tension rod 2632 is fixed to the upper end of the plunger 2631, and a compression block 2633 is connected to the upper end of the tension rod 2632. One end of the output pipe 264 penetrates the outer protective shell 21 and is connected to the cylindrical tank 263.

[0027] The storage tank 261 is used to store oil-dissolving solution, which is replenished through the feed channel 2611. When in operation, the plunger 2631 is located in the lower half of the cylindrical tank 263, blocking the empty pipe 262 to prevent the solution inside the storage tank 261 from flowing into the cylindrical tank 263. When the rotating disk 241 rotates, it drives the first triangular extrusion plate 2412 and the second triangular extrusion plate 2421 to rotate. The second triangular extrusion plate 2421 extrudes the extrusion block 2633 connected to the tension rod 2632, thus driving the tension rod 2632... 32 moves upward, causing plunger 2631 to move upward as well. The moving end is above the empty tube 262. At this time, the solution inside the storage tank 261 flows into the cylindrical tank 263 through the empty tube 262, and the output tube 264 is above and at one end of the cylindrical tank 263. The solution flowing into the cylindrical tank 263 does not immediately flow out through the output tube 264 until the triangular extrusion plate 2421 passes the extrusion block 2633, at which point the plunger 2631 stops moving upward.

[0028] As the rotating disk 241 rotates, the triangular extrusion plate 2412 connected to the hollow rotating rod 242 contacts the top of the tension rod 2632, extruding the tension rod 2632 downwards, causing the plunger 2631 to move downwards. When the plunger 2631 re-blocks the empty tube 262, it pushes the air and solution inside the cylindrical tank 263 to move. At this time, the solution is squeezed into the interior of the output tube 264, and the solution inside the output tube 264 is output from the other end, falling into the through hole 2912 opened in the annular plate 291.

[0029] See Figures 7-11The connecting assembly 28 includes a spring-loaded telescopic rod 281, a locking plate 282, a cross-shaped locking block 283, a rotating rod 284, and a connecting rod 285. One end of the spring-loaded telescopic rod 281 is connected to the outside of the hollow rotating rod 242, and one end of the rotating rod 284 rotates inside the hollow rotating rod 242. One end of the spring-loaded telescopic rod 281 is connected to one side of the locking plate 282, and one end of the cross-shaped locking block 283 is connected to one end of the rotating rod 284. The cross-shaped locking block 283 is inserted into the slot of the locking plate 282. The upper end of the connecting rod 285 is connected to the outer surface of the rotating rod 284. The cleaning assembly 29 includes a circular... The ring plate 291, rotating rod 292, rotating plate 293, scraping rod 294, and sponge 295 are included. The upper side of the ring plate 291 is connected to the bottom end of the connecting rod 285. The outer ring of the ring plate 291 has a through hole 2912. The inner ring of the ring plate 291 has an annular array of annular grooves 2911. The inner side of the ring plate 291 is connected to a guide plate 2913. The two ends of the rotating rod 292 rotate on the inner side of the ring plate 291. The inside of the rotating plate 293 is fixed to the outer surface of the rotating rod 292. One end of the rotating plate 293 is connected to the scraping rod 294, and the other end of the rotating plate 293 is connected to the sponge 295.

[0030] The elastic telescopic rod 281 is elastic. Pulling the locking plate 282 causes the elastic telescopic rod 281 to deform, separating the locking plate 282 and the rotating rod 284. At this time, the rotating rod 284 can rotate, driving the connecting rod 285 to rotate. Rotating 90 degrees aligns the annular plate 291 with the surface of the steel structure. When the locking plate 282 is released, the elastic telescopic rod 281 begins to rebound, driving the locking plate 282 back to its original position, allowing the rotating rod 284 to re-insert into the slot opened in the locking plate 282, fixing the rotating rod 284 to prevent it from rotating.

[0031] The hollow rotating rod 242 drives the connecting assembly 28 to rotate, which in turn drives the cleaning assembly 29 to rotate via the connecting rod 285. When the annular plate 291 is rotated, the rotating rod 292 drives the rotating plate 293 to rotate, which in turn drives the scraping rod 294 to rotate, allowing the scraping rod 294 to scrape off the oil stains on the steel structure surface. At the same time, the output pipe 264 is positioned above, and the solution inside the output pipe 264 falls into the annular groove 2911 and flows along the through hole 2912. Simultaneously, the solution flows through the through hole 2912 and through the annular groove 2911 to one side of the guide plate 2913. The guide plate 2913 guides the solution to flow onto the surface of the scraping rod 294. With the rotation of the scraping rod 294, the solution comes into contact with the oil stains, achieving the effect of cleaning the oil stains.

[0032] Once the oil stains have been cleaned, rotate the connecting rod 285 as described above, rotating it a certain distance. The rotating plate 293 rotates via the rotating rod 292. Flip the rotating plate 293 to adjust the orientation of the scraping rod 294 and the sponge 295, ensuring the sponge 295 is facing the same direction as the scraping rod 294. Then, rotate the connecting rod 285 to keep it on the same horizontal plane as the ultrasonic detector 11, and continue rotating the annular plate 291, moving the sponge 295 to wipe the cleaned steel structure surface, avoiding further cleaning of the steel structure surface. Example 2

[0033] See appendix Figures 1-11 As shown, to solve the above technical problems, a method for detecting corrosion damage in steel structures is provided, the method comprising: The ultrasonic detector 11 is activated to transmit signals via the ultrasonic probe cable 12, controlling the power component 23 to start transmitting power, which drives the transmission component 24 to rotate. This power, in turn, drives the connecting component 28 to rotate, thereby driving the cleaning component 29 to rotate and clean the oil stains on the steel structure surface. Simultaneously, as the transmission component 24 rotates, it drives the solution inside the liquid delivery component 26 to be transported, allowing the solution inside the liquid delivery component 26 to be delivered to one side of the cleaning component 29. This, combined with the rotation of the cleaning component 29, cleans the oil stains. Then, the ultrasonic detector 11 controls the ultrasonic probe head 27 to emit ultrasonic waves to detect the inside of the steel structure and collect the reflected ultrasonic waves. The collected ultrasonic data is displayed on the screen of the ultrasonic detector 11, allowing staff to determine the degree of damage to the steel structure based on the collected data.

[0034] The above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit it. Anyone skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A device for detecting corrosion damage to a steel structure, characterized in that The utility model relates to a kind of steel structure corrosion damage detection devices, including: Detection mechanism (10), the detection mechanism (10) includes ultrasonic detector (11), one side of the ultrasonic detector (11) is inserted with ultrasonic probe cable (12), one end of the ultrasonic probe cable (12) is provided with detection mechanism (20); The detection mechanism (20) includes outer protective shell (21), the inner side of the upper end of the outer protective shell (21) is connected with power assembly (23), the inner side of the outer protective shell (21) is connected with transmission assembly (24), the inner side of the transmission assembly (24) is rotated with fixed rod two (25), the inside of the outer protective shell (21) is connected with liquid delivery assembly (26) along transmission assembly (24) surrounding, the inside of the lower end of the fixed rod two (25) is connected with ultrasonic detection head (27), one end of the ultrasonic detection head (27) is fixedly connected in one end of ultrasonic probe cable (12), the outer side of the lower end of the transmission assembly (24) is provided with connecting assembly (28), one end of the connecting assembly (28) is connected with cleaning assembly (29).

2. The steel structure corrosion damage detection device of claim 1, wherein: The outer surface of the upper end of the ultrasonic detector (11) is fixed with a fixed shell (211), one side of the fixed shell (211) is connected with a handle (212), the inner side of the outer protective shell (21) is connected with a limiting ring (213), the inside of the handle (212) is provided with a battery (22), one end of the fixed rod two (25) is connected to the inner wall of the upper end of the outer protective shell (21).

3. The steel structure corrosion damage detection device of claim 1, wherein: The power assembly (23) includes a motor (231), a transmission rod one (232) and a gear (233), the outer surface of the motor (231) is connected to the inner side of the fixed shell (211), one end of the transmission rod one (232) is connected to the driving end of the motor (231), the transmission rod one (232) penetrates the outer protective shell (21) and extends to the inside of the outer protective shell (21), the gear (233) is fixed to one end of the transmission rod one (232) inside the outer protective shell (21).

4. The steel structure corrosion damage detection device of claim 3, wherein: The transmission assembly (24) comprises a rotating disc (241) and a hollow rotating rod (242), the upper and lower sides of the rotating disc (241) rotate on one side of the limiting ring (213), the upper end of the rotating disc (241) is annularly arrayed with teeth (2411), the lower end of the rotating disc (241) is connected with a triangular extrusion plate one (2412), the upper end of the hollow rotating rod (242) is connected to the bottom side of the rotating disc (241), the outer surface of the upper end of the rotating disc (241) is connected with a triangular extrusion plate two (2421), the triangular extrusion plate two (2421) is meshed and connected with the gear (233), the bottom of the fixed rod two (25) is connected with a circular ring shell (251), the inside of the circular ring shell (251) is connected to the upper end of the outside of the ultrasonic detection head (27), and the lower end of the hollow rotating rod (242) is rotatably connected to the outside of the circular ring shell (251).

5. The steel structure corrosion damage detection device according to claim 4, wherein: The liquid conveying assembly (26) comprises a storage tank (261), an empty pipe (262), a cylindrical tank (263) and an output pipe (264), the inside of the storage tank (261) is connected with the output pipe (264), the outer surface of the storage tank (261) is connected to the inside of the ultrasonic detector (11), the outside of the storage tank (261) is connected with a material channel (2611), the material channel (2611) penetrates through the outer protective shell (21) and extends to the outside of the outer protective shell (21), the outer surface of the cylindrical tank (263) is connected to the inside of the outer protective shell (21), and the two ends of the empty pipe (262) are connected with the storage tank (261) and the cylindrical tank (263).

6. The steel structure corrosion damage detection device according to claim 5, wherein: The inside of the cylindrical tank (263) slidably has a plunger (2631), the upper end of the plunger (2631) is fixedly connected with a stretching rod (2632), the upper end of the stretching rod (2632) is connected with an extrusion block (2633), and one end of the output pipe (264) penetrates through the outer protective shell (21) and is connected with the cylindrical tank (263).

7. The steel structure corrosion damage detection device according to claim 4, wherein: The connecting assembly (28) comprises a elastic telescopic rod (281), a clamping plate (282), a cross clamping block (283), a rotating rod two (284) and a connecting rod (285), one end of the elastic telescopic rod (281) is connected to the outside of the hollow rotating rod (242), one end of the rotating rod two (284) rotates in the inside of the hollow rotating rod (242), one end of the elastic telescopic rod (281) is connected to one side of the clamping plate (282), one end of the cross clamping block (283) is connected to one end of the rotating rod two (284), the cross clamping block (283) is inserted into the slot of the clamping plate (282), and the inside of the upper end of the connecting rod (285) is connected to the outer surface of the rotating rod two (284).

8. The steel structure corrosion damage detection device according to claim 7, wherein: The cleaning assembly (29) comprises a circular ring plate (291), a rotating rod (292), a rotating plate (293), a scraping rod (294) and a sponge (295), the upper side of the circular ring plate (291) is connected to the bottom end of the connecting rod (285), the outer side of the circular ring plate (291) is provided with a through hole (2912), the inner side of the circular ring plate (291) is provided with a circular groove (2911) in an array, and the inner side of the circular ring plate (291) is connected with a guide plate (2913).

9. The steel structure corrosion damage detection device according to claim 8, wherein: The rotating rod (292) is rotatably connected to the inner side of the circular ring plate (291), the rotating plate (293) is fixed to the outer surface of the rotating rod (292), one end of the rotating plate (293) is connected with the scraping rod (294), and the other end of the rotating plate (293) is connected with the sponge (295).

10. A method for detecting corrosion damage of a steel structure using the device for detecting corrosion damage of a steel structure according to any one of claims 1 to 9, characterized in that, The method comprises: The ultrasonic detector (11) transmits signals through the ultrasonic probe cable (12), the power assembly (23) is started to transmit power, the transmission assembly (24) is driven to rotate, the transmission power drives the connecting assembly (28) to rotate, thereby driving the cleaning assembly (29) to rotate, and the oil stains on the surface of the steel structure are cleaned. At the same time, when the transmission assembly (24) rotates, the solution in the liquid delivery assembly (26) is transmitted, the solution in the liquid delivery assembly (26) is delivered to one side surface of the cleaning assembly (29), the oil stains are cleaned by cooperating with the rotation of the cleaning assembly (29), then the ultrasonic detector (11) controls the ultrasonic probe (27) to emit ultrasonic waves, the inside of the steel structure is detected, and the reflected ultrasonic waves are collected, the collected ultrasonic wave data is displayed on the display screen of the ultrasonic detector (11), and the worker judges the damage degree of the steel structure according to the collected data.

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