Intelligent pipeline corrosion on-line detection device

Abstract

This invention relates to the field of pipeline inspection technology and discloses an intelligent online pipeline corrosion detection device, including a pipeline with a traveling mechanism on it. A detection mechanism and a cleaning component are arranged along the forward direction of the traveling mechanism. The detection mechanism has a detection position and a standby position, and is located on the inner ring side of the cleaning component. A detection module is installed on the detection mechanism. In this invention, the detection mechanism and the cleaning component are coaxially arranged. The detection module can prioritize corrosion detection on the pipeline surface. When an abnormal signal caused by rust or other deposits is detected, the detection mechanism automatically returns to the standby position. The cleaning component then starts and drives the grinding block to precisely move to the defect location to complete the rust removal operation. After rust removal, the area can be re-inspected, effectively eliminating interference from rust and other deposits on the detection signal, avoiding missed or false detections caused by surface coverings, and significantly improving the accuracy and reliability of pipeline corrosion detection.

Description

Technical Field

[0001] This invention relates to the field of pipeline inspection technology, specifically to an intelligent online pipeline corrosion detection device. Background Technology

[0002] As a core infrastructure for transporting fluid media in fields such as oil, natural gas, and water supply and drainage, pipelines are directly related to industrial production efficiency, people's livelihood, and ecological environment safety in terms of their operational safety and service life. During long-term service, pipelines are affected by multiple factors such as media erosion, changes in environmental humidity, and soil electrochemical corrosion, and their surfaces are prone to corrosion defects such as rust and pitting. If these defects are not detected and treated in time, they may lead to major safety accidents such as media leakage and pipeline rupture, resulting in huge economic losses and serious environmental pollution.

[0003] Current pipeline inspection typically employs inspection robots that use magnetic wheels to crawl along metal pipes. However, the metal pipes being inspected are exposed to the outside environment for extended periods, leading to corrosion, rust, or other deposits on their surfaces. During the robot's crawling inspection process, the corroded iron filings on the pipe's outer surface can interfere with the operation of the inspection instruments to varying degrees, such as causing signal anomalies, decreased detection accuracy, and in severe cases, missed detections or misjudgments, affecting technicians' assessment of the location and extent of corrosion. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent online pipeline corrosion detection device to solve the problems mentioned in the background art.

[0005] Technical solution This invention provides the following technical solution: an intelligent online pipeline corrosion detection device, comprising a pipeline, a traveling mechanism on the pipeline, a detection mechanism and a cleaning component arranged in the forward direction of the traveling mechanism, the detection mechanism having a detection position and a standby position, the detection mechanism being located on the inner ring side of the cleaning component, the detection mechanism having a detection module, the cleaning component comprising an annular groove plate and an annular rack plate, the annular rack plate having a first connecting column, and a connecting shaft plate being arranged through the first connecting column, the connecting shaft plate having a fixing frame, and the fixing frame having a grinding block, when the detection module detects rust on the pipeline surface at the detection position, the detection mechanism retracts to the standby position, the annular rack plate in the cleaning component rotates and drives the grinding block to rotate to the rust position, the grinding block grinding the rust on the pipeline.

[0006] Preferably, the walking mechanism includes a second cylinder and a clamping roller, wherein the second cylinder ensures that the walking mechanism moves stably on the pipeline through the clamping roller.

[0007] Preferably, a fixed plate is provided on one side of the walking mechanism, the fixed plate is fixedly connected to the annular groove plate, a rotary motor is provided on the fixed plate, a limit pin is provided on the rotating shaft of the rotary motor, a first gear and a connecting ring are sleeved on the limit pin, and the first gear and the connecting ring are in movable contact.

[0008] Preferably, the connecting shaft plate passes through the annular groove plate, a limit block is provided in the connecting shaft plate, a connecting rod is provided on the limit block, and a sliding through hole matching the connecting rod is provided in the fixing frame.

[0009] Preferably, the fixed frame is provided with a first cylinder, a first lead screw and a second lead screw, the first cylinder is provided with a push rod, the push rod is provided with a second connecting post, and the push rod and the connecting rod are fixedly connected.

[0010] Preferably, a stabilizing ring is provided on the second connecting post, the stabilizing ring is fixedly connected to the annular rack plate, and the connecting ring is located in the stabilizing ring.

[0011] Preferably, the first lead screw is provided with a push plate and a second gear, the push plate is provided with a grinding motor, and the second gear is meshed with the push rod.

[0012] Preferably, a protective plate is provided on the second lead screw, and the protective plate is wrapped around the outside of the fixed frame.

[0013] Preferably, both the first lead screw and the second lead screw are provided with rotating wheels, and the two rotating wheels are provided with transmission belts.

[0014] Preferably, the walking mechanism is further provided with a polishing fluid storage tank, and the fixed frame is further provided with a nozzle and a piston cylinder. The polishing fluid storage tank is connected to the piston cylinder through a connecting pipe, the piston cylinder is connected to the nozzle, and one end of the push plate extends into the piston cylinder.

[0015] Beneficial effects Compared with the prior art, the present invention provides an intelligent online pipeline corrosion detection device, which has the following beneficial effects: In this invention, the detection mechanism and cleaning component are coaxially arranged. The detection module can prioritize corrosion detection on the pipe surface. When an abnormal signal caused by rust or other deposits is detected, the detection mechanism can automatically return to the standby position. The cleaning component then starts and drives the grinding block to precisely move to the defect location to complete the rust removal operation. After rust removal, the area can be re-inspected, effectively eliminating the interference of rust and other deposits on the detection signal, avoiding missed or false detections caused by surface coverings, and greatly improving the accuracy and reliability of pipe corrosion detection.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0017] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a front view of the overall structure of the present invention; Figure 2 This is a connection diagram of the walking mechanism and the detection mechanism of the present invention; Figure 3 This is a schematic diagram of the cleaning component of the present invention; Figure 4 This is a schematic diagram of the limiting block of the present invention; Figure 5 This is a schematic diagram of the outer ring side of the cleaning component of the present invention; Figure 6 This is a diagram showing the connection between the fixing frame of the present invention and the annular groove plate via the connecting shaft plate; Figure 7 This is a top view of the interior of the fixed frame of the present invention; Figure 8 This is a view of the connection between the rotary motor and the fixed frame in this invention. Figure 9 This is a second view of the connection between the rotary motor and the inside of the fixed frame in this invention; Figure 10 This is a cross-sectional view of the connection between the connecting ring and the first gear of the present invention; Figure 11 This is a diagram showing the spraying of polishing fluid by the nozzle of the present invention.

[0020] Explanation of reference numerals in the attached figures: In the diagram: 1. Walking mechanism; 2. Detection mechanism; 3. Cleaning component; 4. Detection module; 5. Rotary motor; 6. Fixing frame; 7. Protective plate; 8. Annular groove plate; 9. Annular rack plate; 10. Fixing plate; 11. Connecting rod; 12. Grinding block; 13. Nozzle; 14. Grinding fluid storage tank; 15. First connecting column; 16. Second connecting column; 17. Push plate; 18. First gear; 19. First cylinder; 20. Grinding motor; 21. First lead screw; 22. Second lead screw; 23. Push rod; 24. Rotating wheel; 25. Transmission belt; 26. Second gear; 27. Limiting block; 28. Connecting ring; 29. ​​Limiting pin; 30. Sliding through hole; 31. Connecting shaft plate; 32. Second cylinder; 33. Clamping roller; 34. Piston cylinder; 35. Connecting pipe; 36. Stabilizing ring. Detailed Implementation

[0021] 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.

[0022] Example:

[0023] Please see Figures 1-11 This invention provides a technical solution: an intelligent online pipeline corrosion detection device, comprising a pipeline, a traveling mechanism 1 sleeved on the pipeline, a telescopic cylinder fixedly installed on the traveling mechanism 1, a detection mechanism 2 and a cleaning component 3 fixedly installed in the forward direction of the traveling mechanism 1, the telescopic cylinder being fixedly connected to the detection mechanism 2, the detection mechanism 2 having a detection position and a standby position, the detection mechanism 2 being located on the inner ring side of the cleaning component 3, a detection module 4 fixedly installed on the detection mechanism 2, the cleaning component 3 including an annular groove plate 8 and an annular rack plate 9, a first connecting post 15 provided on the annular rack plate 9, and a connecting shaft plate 31 provided through the first connecting post 15, a fixing frame 6 provided on the connecting shaft plate 31, and a grinding block 12 provided on the fixing frame 6. When the detection module 4 detects rust on the pipeline surface in the detection position, the detection mechanism 2 retracts to the standby position, the annular rack plate 9 in the cleaning component 3 rotates and drives the grinding block 12 to rotate to the rust position, and the grinding block 12 grinds the rust on the pipeline.

[0024] The entire pipeline corrosion detection device can be connected to a ground controller via signal. The connection method and instrument used between the detection device and the ground controller all adopt existing mature technologies.

[0025] The traveling mechanism 1 consists of two parallel track columns, on which travel rollers and a travel motor are installed to ensure that the traveling mechanism 1 can travel on the pipeline. The two track columns are concentric with the pipeline, but the diameter of the track columns is larger than the diameter of the pipeline, and the arc angle of the track columns is greater than 180° and less than 200°.

[0026] The detection mechanism 2 also includes a detection motor, an annular groove plate 8, and an annular rack plate 9. The detection motor drives the annular rack plate 9 to rotate via a gear mounted on its output shaft. The detection module 4 is movably installed in the annular groove plate 8 on the side away from the detection end. There are two detection modules 4, symmetrically arranged, and they are fixedly connected to the annular rack plate 9. When the detection motor operates, it drives the annular rack plate 9 to rotate, which in turn drives both detection modules 4 to rotate simultaneously. This causes the annular rack plate 9 to drive the two detection modules 4 in a circular motion, with a maximum rotation angle of 180°. This means that each detection module 4 only needs to detect half of the pipe surface. Moreover, after the detection mechanism 2 has detected one cross-section of the pipe, it does not need to return to its original position. After the traveling mechanism 1 advances one cross-section of the detection range, the detection motor reverses, causing the detection module 4 from the previous detection range to rotate counterclockwise. This allows adjacent cross-section detection ranges to be interleaved, reducing the rotation time of the detection mechanism 2 after each detection and increasing work efficiency.

[0027] In this embodiment, a second cylinder 32 is fixedly installed at the end of the walking mechanism 1, and a clamping roller 33 is movably installed thereon. The second cylinder 32 ensures that the walking mechanism 1 moves stably on the pipe through the clamping roller 33. The second cylinder 32 can drive the clamping roller 33 to contact the pipe surface, so that the walking mechanism 1 can move more stably on the pipe surface with the cooperation of its own track column and the clamping roller 33. This allows the walking mechanism 1 to move at any position on the cross-section of the pipe without falling off.

[0028] The walking mechanism 1 adopts a structure with double track columns with an arc angle of 180°-200°, along with traveling rollers and a traveling motor. It also adds a clamping roller driven by a second cylinder, forming a dual fixing structure of "track encirclement + active clamping". This ensures that the device can move stably at any position on the pipe cross-section and prevents the device from falling off the pipe. It can be adapted to pipes of different diameters and can meet the online inspection needs of the entire circumference and long distance of the pipe, solving the problem of easy deviation and falling of traditional inspection devices.

[0029] In this embodiment, a fixed plate 10 is fixedly installed on one side of the walking mechanism 1. The telescopic cylinder for connecting the detection mechanism 2 is located on the inner ring side of the fixed plate 10. The fixed plate 10 is fixedly connected to the annular groove plate 8. A rotary motor 5 is fixedly installed on one side of the fixed plate 10. A limit pin 29 is fixedly installed on the rotating shaft of the rotary motor 5. A first gear 18 and a connecting ring 28 are sleeved on the outer side of the limit pin 29. The first gear 18 and the connecting ring 28 are in movable contact. One end of the connecting ring 28 extends into the first gear 18. The rotary motor 5 will drive the first gear 18 to rotate through the limit pin 29. The first gear 18 will not be restricted by the connecting ring 28 when rotating. At the same time, the first gear 18 will not drive the connecting ring 28 to rotate when rotating.

[0030] The setting of the limiting pin 29 allows the first gear 18 to move laterally on the limiting pin 29. That is, when the limiting pin 29 rotates, the first gear 18 will rotate synchronously. However, the connecting ring 28 does not directly contact the surface of the limiting pin 29. There is a gap between the two, and the gap distance is greater than the protrusion height of the limiting pin 29.

[0031] The rotary motor 5 is equipped with a sensor that controls its operation.

[0032] In this embodiment, the connecting shaft plate 31 passes through the annular groove plate 8, and a limiting block 27 is engaged in the connecting shaft plate 31. A limiting through hole matching the limiting block 27 is opened through the annular groove plate 8, and the width of the limiting through hole is equal to the width of the connecting shaft plate 31. That is, when the limiting block 27 is separated from the annular groove plate 8, the connecting shaft plate 31 can be detached from the annular groove plate 8. A connecting rod 11 is fixedly installed at one end of the limiting block 27. A sliding through hole 30 matching the connecting rod 11 is opened in the fixing frame 6 to facilitate the lateral movement of the connecting rod 11. In this way, when the connecting rod 11 moves laterally, the connecting rod 11 can drive the limiting block 27 to separate from or contact the annular groove plate 8.

[0033] Both the detection mechanism 2 and the cleaning component 3 are concentric circles with the pipe, but the detection module 4 is closer to the pipe surface than the grinding block 12.

[0034] The telescopic cylinder, detection module 4, and sensor all adopt existing mature technologies. The detection module 4 can use an ultrasonic flaw detector, a magnetic flux leakage detector, or an eddy current detector. When the detection module 4 detects a difference in the pipeline signal at the detection position, the detection signal will be different from that at the good position. At this time, the telescopic cylinder will drive the detection module 4 back to the standby position, so that the grinding block 12 can approach the pipeline defect for grinding. Then, the detection module 4 will re-inspect this position to avoid interference from rust or other attachments on the pipeline surface.

[0035] Connecting shaft plates 31 are provided on both symmetrical sides of the annular groove plate 8, but the limiting block 27 is only engaged at one end of the annular groove plate 8. In this way, when one of the connecting shaft plates 31 extends out of the annular groove plate 8, the other connecting shaft plate 31 is still moving in the annular groove plate 8, providing a support point for the component extending out of the annular groove plate 8, while preventing the grinding block 12 from failing to complete the grinding of the pipe.

[0036] In this embodiment, a first cylinder 19 is fixedly installed in the fixed frame 6, and a first lead screw 21 and a second lead screw 22 are movably installed respectively. A push rod 23 is fixedly installed on the output shaft of the first cylinder 19, and a second connecting column 16 is fixedly installed on the push rod 23. The push rod 23 is fixedly connected to the connecting rod 11. A sensor is provided on the first cylinder 19. When the telescopic cylinder moves the detection mechanism 2 to the standby position, the first cylinder 19 will start to work.

[0037] In this embodiment, one end of the second connecting post 16 extends out of the fixing frame 6 and is fixedly installed with a stabilizing ring 36. The stabilizing ring 36 is fixedly connected to the annular rack plate 9. The end of the connecting ring 28 away from the first gear 18 is located in the stabilizing ring 36, and an annular cavity is provided in the stabilizing ring 36. In this way, when the stabilizing ring 36 rotates with the second connecting post 16, the stabilizing ring 36 is always movably connected with the connecting ring 28. When the stabilizing ring 36 moves laterally, it can still drive the connecting ring 28 to move laterally together.

[0038] In this embodiment, a push plate 17 is threaded to the outer side of the first lead screw 21, and a second gear 26 is fixedly installed at the end of the first lead screw 21. A grinding motor 20 is fixedly installed on the push plate 17. The second gear 26 is meshed with the push rod 23. When the push rod 23 moves, the first lead screw 21 can be driven to rotate through the second gear 26. When the first lead screw 21 rotates, it can drive the grinding motor 20 and the grinding block 12 to approach the surface of the pipe. At the same time, a sensor is also installed in the grinding motor 20 to control the operation of the grinding motor 20.

[0039] In this embodiment, a protective plate 7 is threadedly connected to the outer side of the second lead screw 22. The protective plate 7 is wrapped around the outside of the fixed frame 6. When the grinding block 12 grinds the rust on the pipe, the protective plate 7 can prevent the rust from splashing and spreading.

[0040] In this embodiment, rotating wheels 24 are fixedly installed on the outer sides of the first lead screw 21 and the second lead screw 22. A transmission belt 25 is sleeved on the two rotating wheels 24. The rotating wheel 24 on the first lead screw 21 is fixedly connected to the second gear 26 and integrated into one unit.

[0041] In this embodiment, a polishing fluid storage tank 14 is also fixedly installed on the walking mechanism 1. The polishing fluid storage tank 14 can act as a counterweight to prevent the detection mechanism 2 and cleaning component 3 on one side of the walking mechanism 1 from tipping over. A piston cylinder 34 is also fixedly installed in the fixed frame 6, and a nozzle 13 is fixedly installed on the side of the fixed frame 6 near the pipe. The polishing fluid storage tank 14 is connected to the piston cylinder 34 through a connecting pipe 35. The connecting pipe 35 is telescopic. The piston cylinder 34 is connected to the nozzle 13. One end of the push plate 17 extends into the piston cylinder 34.

[0042] The cleaning component 3, through the meshing transmission of the rotary motor 5, the first gear 18, and the annular rack plate 9, can drive the grinding block 12 to move precisely along the circumference of the pipe to the position to be rusted. The push rod driven by the first cylinder 19 can simultaneously unlock the limit block 27, engage the first gear 18, and feed the grinding block 12 and the protective plate 7, realizing the automated linkage of the rust removal process. During the grinding process, the protective plate 7 can effectively block rust from splashing. At the same time, the linkage design of the grinding fluid storage tank 14, the piston cylinder 34, and the nozzle 13 can spray the grinding fluid simultaneously during grinding, which not only improves the efficiency and effect of rust removal, but also reduces the risk of damage to the pipe surface during grinding. Furthermore, the counterweight effect of the grinding fluid storage tank 14 can further improve the overall stability of the device.

[0043] The special structure of the limiting pin 29 enables the synchronous rotation and lateral movement of the first gear 18. The locking design of the limiting block 27 between the connecting shaft plate 31 and the annular groove plate 8 allows the connecting shaft plate 31 and the annular groove plate 8 to be separated when needed, facilitating the disassembly and maintenance of the cleaning components.

[0044] Each drive component (telescopic cylinder, first cylinder, etc.) is equipped with sensors to achieve precise control, and the core detection modules (ultrasonic flaw detector, magnetic flux leakage detector, etc.) and drive elements all adopt mature technologies, which reduces the research and development and maintenance costs of the device, while ensuring the stability and compatibility of the device operation.

[0045] The working principle of this embodiment is as follows: When in use, the entire detection device is placed on the pipe to be detected by the walking mechanism 1. The stability of the entire detection device on the pipe can be further ensured by the second cylinder 32 and the clamping roller 33.

[0046] When the traveling mechanism 1 moves forward, the detection module 4 on the detection mechanism 2 can perform corrosion detection on the pipeline. When the signal emitted by the detection module 4 on the detection mechanism 2 changes, i.e., at the defect on the pipeline surface, the telescopic cylinder will drive the detection mechanism from the detection position back to the standby position. At this time, the first cylinder 19 drives the push rod 23 to move laterally for the first stroke. When the push rod 23 moves, it will also drive the connecting rod 11 and the second connecting column 16 to move laterally. However, at this time, the push rod 23 will not drive the second gear 26 to rotate. When the connecting rod 11 moves, it can drive the limit block 27 to separate from the annular groove plate 8. At the same time, the first cylinder 19 drives the push rod 23 to move laterally for the first stroke. When the second connecting column 16 moves, it will drive the stabilizing ring 36 to move towards the fixed frame 6. The stabilizing ring 36 and the connecting ring 28 will then drive the first gear 18 to move laterally. At this time, the first gear 18 will mesh with the annular rack plate 9. The operation of the rotary motor 5 will drive the first gear 18 to rotate via the limit pin 29. When the first gear 18 rotates, it will drive the annular rack plate 9 to rotate. The annular rack plate 9 is fixedly connected to the connecting shaft plate 31 via the first connecting column 15. Thus, the connecting shaft plate 31 will extend out of the annular groove plate 8 and drive the fixed frame 6 to rotate along the pipe. When the fixed frame 6... When the upper grinding block 12 moves to the defect on the pipe surface, the first cylinder 19 will move in its second stroke. At this time, the first gear 18 will not disengage from the ring rack plate 9, and the push rod 23 will also drive the second gear 26 to rotate. When the second gear 26 rotates, it will drive the first lead screw 21 to rotate, and through the rotating wheel 24 and the transmission belt 25, it will drive the second lead screw 22 to rotate. When the second lead screw 22 rotates, it will drive the protective plate 7 to move closer to the pipe surface. When the first lead screw 21 rotates, it will drive the grinding motor 20 and the grinding block 12 closer to the position to be ground on the pipe through the push plate 17. When the piston cylinder 34 is moved, the grinding fluid in the piston cylinder 34 can be pushed from the grinding fluid storage tank 14 and the connecting pipe 35 into the nozzle 13 and sprayed onto the area to be ground on the grinding block 12, which facilitates the grinding of the grinding block 12. The grinding motor 20 drives the grinding block 12 to grind, which can remove the rust at the grinding position. When the rust position on the cross-section of the pipe is large, the rotary motor 5 can continue to work, which will drive the grinding block 12 to grind along the surface of the pipe, completing the grinding of the rust position, which is convenient for the subsequent inspection structure 2 to re-inspect and complete the corrosion inspection of the pipe.

[0047] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An intelligent online pipeline corrosion detection device, comprising a pipeline and a traveling mechanism (1) installed on the pipeline, characterized in that: The walking mechanism (1) is provided with a detection mechanism (2) and a cleaning component (3) in the forward direction. The detection mechanism (2) is provided with a detection position and a standby position. The detection mechanism (2) is located on the inner ring side of the cleaning component (3). The detection mechanism (2) is provided with a detection module (4). The cleaning component (3) includes an annular groove plate (8) and an annular rack plate (9). The annular rack plate (9) is provided with a first connecting column (15) and a connecting shaft plate (31) is provided through the first connecting column (15). The connecting shaft plate (31) is provided with a fixing frame (6) and a grinding block (12) is provided on the fixing frame (6). When the detection module (4) detects rust on the pipe surface at the detection position, the detection mechanism (2) returns to the standby position. The annular rack plate (9) in the cleaning component (3) rotates and drives the grinding block (12) to rotate to the rust position. The grinding block (12) grinds the rust on the pipe.

2. The intelligent pipeline corrosion online detection device according to claim 1, characterized in that: The walking mechanism (1) includes a second cylinder (32) and a clamping roller (33). The second cylinder (32) ensures that the walking mechanism (1) moves stably on the pipeline by means of the clamping roller (33).

3. The intelligent pipeline corrosion online detection device according to claim 1, characterized in that: A fixed plate (10) is provided on one side of the walking mechanism (1). The fixed plate (10) is fixedly connected to the annular groove plate (8). A rotary motor (5) is provided on the fixed plate (10). A limit pin (29) is provided on the rotating shaft of the rotary motor (5). A first gear (18) and a connecting ring (28) are sleeved on the limit pin (29). The first gear (18) and the connecting ring (28) are in contact.

4. The intelligent pipeline corrosion online detection device according to claim 3, characterized in that: The connecting shaft plate (31) passes through the annular groove plate (8), and a limiting block (27) is provided in the connecting shaft plate (31). A connecting rod (11) is provided on the limiting block (27), and a sliding through hole (30) matching the connecting rod (11) is provided in the fixing frame (6).

5. The intelligent pipeline corrosion online detection device according to claim 4, characterized in that: The fixed frame (6) is provided with a first cylinder (19), a first lead screw (21) and a second lead screw (22). The first cylinder (19) is provided with a push rod (23), and the push rod (23) is provided with a second connecting column (16). The push rod (23) is fixedly connected to the connecting rod (11).

6. The intelligent pipeline corrosion online detection device according to claim 5, characterized in that: The second connecting post (16) is provided with a stabilizing ring (36), which is fixedly connected to the annular rack plate (9), and the connecting ring (28) is located in the stabilizing ring (36).

7. The intelligent pipeline corrosion online detection device according to claim 5, characterized in that: The first lead screw (21) is provided with a push plate (17) and a second gear (26). The push plate (17) is provided with a grinding motor (20). The second gear (26) is meshed with the push rod (23).

8. The intelligent pipeline corrosion online detection device according to claim 5, characterized in that: The second lead screw (22) is provided with a protective plate (7), which is wrapped around the outside of the fixed frame (6).

9. The intelligent pipeline corrosion online detection device according to claim 6, characterized in that: Both the first lead screw (21) and the second lead screw (22) are provided with rotating wheels (24), and the two rotating wheels (24) are provided with transmission belts (25).

10. The intelligent pipeline corrosion online detection device according to claim 7, characterized in that: The walking mechanism (1) is also equipped with a polishing fluid storage tank (14), and the fixed frame (6) is also equipped with a nozzle (13) and a piston cylinder (34). The polishing fluid storage tank (14) is connected to the piston cylinder (34) through a connecting pipe (35), and the piston cylinder (34) is connected to the nozzle (13). One end of the push plate (17) extends into the piston cylinder (34).

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