A steel pipe corrosion scanner

Abstract

This invention belongs to the technical field of corrosion scanning instruments, and specifically relates to a steel pipe corrosion scanning instrument, comprising a detection body and a scanning probe. The detection body is electrically connected to the scanning probe via a retraction mechanism. The scanning probe includes a mounting base, with a cleaning component connected to the upper side wall of the mounting base, a handle and a marking component connected to the lower side wall of the mounting base, and a probe component connected to the front side wall of the mounting base. When the operator holds the scanning instrument to detect corrosion on steel pipes, this invention allows for the release of a cable of appropriate length based on the distance between the detection body and the scanning probe. This avoids the problem of long cables sag and snag on other objects, reducing the efficiency of steel pipe detection. Furthermore, during the detection process, the probe can be kept close to the concave surface of the curved pipe, ensuring stable signal transmission. It can also be adapted to steel pipes of different diameters, improving the applicability of the scanning instrument.

Description

Technical Field

[0001] This invention belongs to the technical field of corrosion scanning instruments, and in particular relates to a steel pipe corrosion scanning instrument. Background Technology

[0002] Corrosion of boiler water-cooled wall pipes is a critical issue affecting the safe and stable operation of boilers. It manifests in various forms, primarily including oxygen corrosion, acid corrosion, alkaline corrosion, hydrogen damage, stress corrosion cracking, abrasive corrosion, and high-temperature corrosion on the flue gas side. Oxygen corrosion is caused by residual dissolved oxygen in the feedwater, forming ulcer-like or pitted depressions on the inner surface of the pipes. Acidic and alkaline corrosion are often caused by abnormal boiler water pH or localized concentration, frequently occurring in areas with high heat loads, poor water circulation, and sediment cover, resulting in uniform metal thinning or the formation of deep pits and irregular corrosion depressions, respectively. Hydrogen damage... Hydrogen blistering, hydrogen-induced cracking, and decarburization are caused by the infiltration of atomic hydrogen generated during acid corrosion and other processes into steel. Stress corrosion cracking is the brittle cracking of metals under the combined action of specific corrosive media and tensile stress. Wear corrosion originates from the mechanical scouring and corrosion synergistic effect of high-speed flowing boiler water. High-temperature corrosion on the flue gas side is related to harmful substances generated by fuel combustion and the combustion environment. Therefore, after a period of use, boiler water-cooled wall pipes need to be inspected. For example, a steel pipe corrosion scanner is proposed in patent publication number CN210136205U.

[0003] Existing corrosion scanners have two main problems in use: First, during operation, the operator needs to hold the main body of the scanner in one hand and push the scanning probe across the surface of the steel pipe with the other to detect corrosion. However, when the probe is moved to a bend in the steel pipe, it is difficult to make good contact with the concave surface of the bend, which obstructs the transmission of the detection signal and affects the accuracy of the results. Second, the main body of the scanner and the scanning probe are connected by a cable, and in order to ensure flexible probe movement, the cable needs to be relatively long. When the operator moves the probe by hand, the excessively long cable is prone to snagging on other objects, which may cause the probe to separate from the main body of the scanner, thereby reducing the efficiency of steel pipe corrosion detection.

[0004] To address this issue, a steel pipe corrosion scanner is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a steel pipe corrosion scanning instrument.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a steel pipe corrosion scanner, comprising a detection body and a scanning probe, wherein the detection body is electrically connected to the scanning probe via a retraction mechanism, the scanning probe comprises a mounting base, a cleaning assembly is connected to the upper side wall of the mounting base, a handle and a marking assembly are connected to the lower side wall of the mounting base, and a probe assembly is connected to the front side wall of the mounting base.

[0007] Preferably, the take-up and unwinding mechanism includes a take-up and unwinding box, which is fixedly connected to the side wall of the detection body. A partition is fixedly connected to the inner wall of the take-up and unwinding box, and a connecting pipe is rotatably connected to the side wall of the partition via a bearing. A servo motor is connected to the right side wall of the take-up and unwinding box, and the same take-up drum is connected between the output end of the servo motor and the connecting pipe. A first wire is wound around the outer wall of the take-up drum, and a second wire is inserted into the front side wall of the detection body. The end of the second wire away from the detection body passes through the take-up and unwinding box and the connecting pipe, and is electrically connected to the first wire through an annular conductive mechanism. A passage is provided on the side wall of the take-up and unwinding box, and the end of the first wire away from the take-up drum passes through the passage and is inserted into the scanning probe. A tension sensor is fixedly connected to the lower side wall of the mounting base, and the detection end of the tension sensor is connected to a mounting sleeve via a pull rope. The end of the first wire passes through the mounting sleeve, and the mounting sleeve is fixed to the first wire by a positioning bolt.

[0008] Preferably, the cleaning assembly includes a cleaning box fixedly connected to the side wall of the mounting base. The rear side wall of the cleaning box is connected to two arc-shaped plates. The rear side wall of the arc-shaped plates is curved, and brush bristles are connected to the side wall of the curved surface. The arc-shaped plates are hollow. Multiple dust suction holes are opened on both the arc-shaped plates and the side wall of the cleaning box. The arc-shaped plates and the cleaning box are connected. A dust collection box is connected to the front side wall of the mounting base. A dust pump is connected to the front side wall of the dust collection box. The suction end of the dust pump is connected to the dust collection box, and a filter element is provided inside the dust collection box at the suction end of the dust pump. The dust collection box and the cleaning box are fixedly connected by the same suction pipe. A first electric push rod is connected to the front side wall of the cleaning box. The moving end of the first electric push rod passes through the cleaning box and is connected to an electric polishing roller.

[0009] Preferably, the marking assembly includes a placement plate fixedly connected to the lower side wall of the mounting base, a marking electric push rod connected to the front side wall of the placement plate, the moving end of the marking electric push rod passing through the placement plate and fixedly connected to a tube via a force sensor, and chalk inserted into the tube.

[0010] Preferably, the probe assembly includes a small electric push rod fixedly connected to the front side of the mounting base. The movable end of the small electric push rod passes through the mounting base and is connected to a lifting box. Multiple piston cylinders are fixedly connected to the side wall of the lifting box away from the small electric push rod. Multiple piston rods are movably inserted into the side wall of the piston cylinder away from the lifting box. A piston plate is fixedly connected to one end of each piston rod inside the piston cylinder. The same spring is fixedly connected between the piston plate and the piston cylinder. The ends of the multiple piston rods extending out of the piston cylinders are fixedly connected to the same flexible plate. Multiple probe bodies are fixedly connected to the side wall of the flexible plate away from the piston rods. The probe bodies are electrically connected to the detection body through a retraction mechanism and an electrical connection to a first wire through a spring wire. A water tank mechanism is connected to the side wall of the lifting box.

[0011] Preferably, the water tank mechanism includes a water tank body fixedly connected to the side wall of the lifting box, the water tank body and the lifting box are fixedly connected by the same bent pipe, the bent pipe is provided with a control valve, and the left inner wall of the water tank body is connected to a piston seat by a spring.

[0012] Preferably, the side wall of the mounting base away from the handle is connected to four guide wheels via a bracket, with two guide wheels on the same side placed symmetrically at an angle.

[0013] Preferably, the small electric push rod and the lifting box are connected to the same pressure sensor, and the pressure sensor is electrically connected to the internal controller of the detection body.

[0014] Compared with existing technologies, the advantages of a steel pipe corrosion scanner are:

[0015] With the designed cable release mechanism, when the operator uses a handheld scanner to inspect the corrosion of steel pipes, an appropriate length of cable can be released based on the distance between the inspection body and the scanning probe. This avoids the problem of long cables slumping down and easily getting caught on other objects, thus reducing the efficiency of steel pipe inspection.

[0016] By using the probe assembly, the probe can be placed close to the concave surface of the curved pipe during the inspection of steel pipes, ensuring the stability of signal transmission. It can also be adapted to steel pipes of different diameters, thus improving the applicability of the scanner.

[0017] With the cleaning component in place, during the process of using the scanner to detect internal corrosion of steel pipes, impurities attached to the outer wall of the steel pipe can be automatically cleaned, ensuring the fit between the scanner and the steel pipe and further enhancing the detection accuracy of the scanner. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a steel pipe corrosion scanner provided by the present invention;

[0019] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle;

[0020] Figure 3 This is a schematic diagram of the cleaning component in a steel pipe corrosion scanner provided by the present invention;

[0021] Figure 4 This is a schematic diagram of the marking component in a steel pipe corrosion scanner provided by the present invention;

[0022] Figure 5 This is a schematic diagram of the receiving and releasing mechanism in a steel pipe corrosion scanner provided by the present invention;

[0023] Figure 6 This is a schematic diagram of the probe assembly in a steel pipe corrosion scanner provided by the present invention;

[0024] Figure 7 This is a schematic diagram of the surface structure of the lifting box in a steel pipe corrosion scanner provided by the present invention;

[0025] Figure 8 This is a schematic diagram of the internal structure of the piston cylinder in a steel pipe corrosion scanner provided by the present invention;

[0026] Figure 9 This is a schematic diagram of the water tank mechanism in a steel pipe corrosion scanner provided by the present invention.

[0027] In the diagram: 1. Detection body, 2. Scanning probe, 3. Mounting base, 4. Handle, 5. Retraction mechanism, 51. Retraction box, 52. Partition, 6. Connecting pipe, 7. Servo motor, 8. Retraction drum, 9. First wire, 10. Second wire, 11. Tension sensor, 12. Pull rope, 13. Mounting sleeve, 14. Cleaning assembly, 141. Cleaning box, 142. Arc plate, 15. Dust suction hole, 16. Dust collection box, 17. Dust pump, 18. Pressure sensor, 19. Dust suction pipe, 20. First electric push rod, 21. Electric grinding roller, 22. Marking assembly, 221. Placement plate, 222. Marking electric push rod, 23. Insert tube, 24. Chalk, 25. Probe assembly, 251. Small electric push rod, 252. Lifting box, 26. Piston cylinder, 27. Piston rod, 28. Piston plate, 29. Flexible plate, 30. Probe body, 31. Water tank mechanism, 311. Water tank body, 312. Bend, 32. Control valve, 33. Piston seat, 34. Guide wheel. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] like Figures 1-9As shown, a steel pipe corrosion scanner includes a detection body 1 and a scanning probe 2. The detection body 1 is electrically connected to the scanning probe 2 via a retraction mechanism 5. The scanning probe 2 includes a mounting base 3. A cleaning assembly 14 is connected to the upper side wall of the mounting base 3, and a handle 4 and a marking assembly 22 are connected to the lower side wall of the mounting base 3. Four guide wheels 34 are connected to the side wall of the mounting base 3 away from the handle 4 via a bracket. Two guide wheels 34 on the same side are symmetrically inclined. A probe assembly 25 is connected to the front side wall of the mounting base 3. The probe assembly 25 includes a small electric push rod 251 fixedly connected to the front side of the mounting base 3. The moving end of the small electric push rod 251 passes through the mounting base 3 and is connected to a lifting box 252. A pressure sensor 18 is connected between the small electric push rod 251 and the lifting box 252. The pressure sensor 18 is electrically connected to the controller inside the detection body 1. Multiple piston cylinders 26 are fixedly connected to the side wall of the lifting box 252 away from the small electric push rod 251. The piston cylinders 26 are located away from the lifting box 252. Multiple piston rods 27 are movably inserted into the side wall of the lifting box 252. A piston plate 28 is fixedly connected to one end of the piston rod 27 inside the piston cylinder 26. The same spring is fixedly connected between the piston plate 28 and the piston cylinder 26. The same flexible plate 29 is fixedly connected to one end of the multiple piston rods 27 extending out of the piston cylinder 26. Multiple probe bodies 30 are fixedly connected to the side wall of the flexible plate 29 away from the piston rods 27. The probe bodies 30 are electrically connected to the detection body 1 through the retraction mechanism 5. The probe bodies 30 are electrically connected to the first wire 9 through the spring wire. A water tank mechanism 31 is connected to the side wall of the lifting box 252. The water tank mechanism 31 includes a water tank body 311 fixedly connected to the side wall of the lifting box 252. The same bent pipe 312 is fixedly connected between the water tank body 311 and the lifting box 252. A control valve 32 is provided in the bent pipe 312. A piston seat 33 is connected to the left inner wall of the water tank body 311 through a spring. Through this component, steel pipes of different sizes and the bends of the pipes can be detected.

[0030] The take-up and take-down mechanism 5 includes a take-up and take-down box 51, which is fixedly connected to the side wall of the detection body 1. A partition 52 is fixedly connected to the inner wall of the take-up and take-down box 51. A connecting pipe 6 is rotatably connected to the side wall of the partition 52 via a bearing. A servo motor 7 is connected to the right side wall of the take-up and take-down box 51. The same take-up drum 8 is connected between the output end of the servo motor 7 and the connecting pipe 6. A first wire 9 is wound around the outer wall of the take-up drum 8. A second wire 10 is inserted into the front side wall of the detection body 1. The end of the second wire 10 away from the detection body 1 passes through the take-up and take-down box 51 and the connecting pipe. 6. The first wire 9 is electrically connected to the ring conductive mechanism. The side wall of the take-up and take-down box 51 has a passage. The end of the first wire 9 away from the take-up drum 8 passes through the passage and is inserted into the scanning probe 2. The lower side wall of the mounting base 3 is fixedly connected to a tension sensor 11. The detection end of the tension sensor 11 is connected to a mounting sleeve 13 through a pull rope 12. The end of the first wire 9 passes through the mounting sleeve 13. The mounting sleeve 13 is fixed to the first wire 9 by a positioning bolt. Through this mechanism, the lengths of the first wire 9 and the second wire 10 can be adjusted.

[0031] The cleaning assembly 14 includes a cleaning box 141 fixedly connected to the upper side wall of the mounting base 3. Two arc-shaped plates 142 are connected to the rear side wall of the cleaning box 141. The rear side wall of the arc-shaped plates 142 is curved, and brush bristles are attached to the curved side wall. The arc-shaped plates 142 have a hollow structure. Multiple dust suction holes 15 are provided on the side walls of both the arc-shaped plates 142 and the cleaning box 141. The arc-shaped plates 142 and the cleaning box 141 are in communication. A dust collection box 16 is connected to the front side wall of the mounting base 3. The front side wall of the dust collection box 16 is connected to... A vacuum pump 17 is provided, the suction end of the vacuum pump 17 is connected to the dust collection box 16, and the dust collection box 16 is equipped with a filter element located at the suction end of the vacuum pump 17. The dust collection box 16 and the cleaning box 141 are fixedly connected by the same vacuum pipe 19. The front side wall of the cleaning box 141 is connected to a first electric push rod 20. The moving end of the first electric push rod 20 passes through the cleaning box 141 and is connected to an electric grinding roller 21. Through this component, impurities attached to the surface of the steel pipe can be cleaned.

[0032] The marking assembly 22 includes a placement plate 221 fixedly connected to the lower side wall of the mounting base 3. A marking electric push rod 222 is connected to the front side wall of the placement plate 221. The moving end of the marking electric push rod 222 passes through the placement plate 221 and is fixedly connected to a tube 23 via a force sensor. A piece of chalk 24 is inserted into the tube 23. Through this assembly, the corroded area of ​​the steel pipe can be marked.

[0033] The operating principle of this invention is explained as follows: The operator places the detection body 1 and the scanning probe 2 at the boiler water-cooled wall pipe, then passes the first wire 9 through the mounting sleeve 13 and inserts it into the socket of the scanning probe 2. At the same time, the second wire 10 is inserted into the socket on the surface of the detection body 1. Then, the operator places the four guide wheels 34 on the rear side of the scanning probe 2 against the surface of the pipe to be tested. Then, an electrical signal is sent to the controller inside the detection body 1 through the button on the surface of the detection body 1. After receiving the electrical signal, the controller controls the control valve 32 to open, and then controls the small electric push rod 251 to work. The small electric push rod 251 will drive the lifting box 252, piston cylinder 26, piston rod 27, flexible plate 29 and multiple probe bodies 30 to move towards the pipe to be tested through the pressure sensor 18, so that the probe body 30 contacts the pipe to be tested. When the probe body 30 and the pipe to be tested are in contact, the probe body 30 will contact the pipe to be tested. After contact with the surface of the pipe, the probe body 30 will cause the flexible plate 29 and the corresponding piston rod 27 to stop moving. Meanwhile, the lifting box 252 and piston cylinder 26, driven by the small electric push rod 251, continue to move closer to the pipe being tested. The piston rod 27 controls the piston plate 28 to remain fixed inside the piston cylinder 26, and the space above the piston plate 28 will gradually be compressed. The liquid above the piston plate 28 will be transported to the water tank body 311 through the lifting box 252 and the bend 312. When the small electric push rod 251 moves the lifting box 252 to a set distance, the controller will control the control valve 32 to close and control the small electric push rod 251 to move the lifting box 252, piston cylinder 26, piston rod 27, flexible plate 29, and probe body 30 2mm away from the steel pipe being tested. The flexible plate 29 and multiple probe bodies 30 will maintain the curvature of their contact with the pipe being tested (see reference). Figure 7 (as shown)

[0034] Next, the operator can send an electrical signal to the controller via the touchscreen on the surface of the detection body 1. The controller will then control the probe body 30 to perform the detection work and control the first electric push rod 20 and the dust pump 17 to work. The first electric push rod 20 will drive the electric grinding roller 21 to move to the set position to contact the surface of the pipe to be tested, maintaining a pressure of 10N between the electric grinding roller 21 and the pipe to be tested. Then, the operator manually pushes the scanning probe 2 to move, which will drive the electric grinding roller 21 to move, using the electric grinding roller 21 to clean the impurities attached to the surface of the pipe. At the same time, the dust pump 17 will extract the air inside the dust collection box 16, and the external air will carry the dust that has been ground down, and then it will be drawn out by the suction. Dust pore 15 enters the arc plate 142 and cleaning box 141, and finally enters the dust collection box 16 through suction pipe 19. After the electric grinding roller 21 cleans the impurities on the pipe surface, the probe body 30 moves to the grinding area to perform the detection step. When the scanning probe 2 moves to the concave area of ​​the curved pipe 312, the operator needs to repeat the above steps to make the flexible plate 29 fit with the concave area of ​​the curved pipe 312 for detection. The concave area of ​​the curved pipe 312 needs to be manually ground. The operator also needs to control the small electric push rod 251 through the touch screen on the surface of the detection body 1 to move the flexible plate 29 and the probe body 30 to the bottom of the guide wheel 34 (see reference). Figure 6 As shown), to avoid positional interference between the guide wheel 34 and the concave area of ​​the arched belly of the mounting base 3 and the bend 312, which would affect the detection of the probe body 30;

[0035] As the operator moves the scanning probe 2 upwards, the lower end of the first lead wire 9 applies pressure to the tension sensor 11 through the mounting sleeve 13 and the pull rope 12. Upon detecting this, the controller controls the servo motor 7 (which, along with other electrical components such as the servo motor 7, small electric push rod 251, and vacuum pump 17, is electrically connected to the internal battery of the detection body 1) to rotate forward. The servo motor 7 drives the take-up drum 8 to rotate forward, gradually releasing the first lead wire 9 wound around the outside of the take-up drum 8. The end of the second lead wire 10 is electrically connected to the first lead wire 9 through an annular conductive mechanism (the annular conductive mechanism includes a conductor with a fixed angle and an annular conductive ring; the conductor and the end of the second lead wire 10 are electrically connected). The first wire 9 is connected to the inside of the take-up drum 8. The annular conductive ring is embedded inside the take-up drum 8 and slides in contact with the conductor. The left end of the first wire 9 is electrically connected to the annular conductive ring. The electrical signal is transmitted to the detection body 1 through the first wire 9, the annular conductive ring, the conductor, and the second wire 10. The first wire 9 is electrically connected to the probe body 30 through a spring wire. Thus, the detection body 1 and the scanning probe 2 can be connected. Similarly, when the controller detects that the tension sensor 11 is not under tension, the controller will control the servo motor 7 to rotate in the opposite direction to wind up the first wire 9. This avoids the problem that long cables may easily snag on other objects and reduce the efficiency of steel pipe detection.

[0036] 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 steel pipe corrosion scanner, comprising a detection body (1) and a scanning probe (2), characterized in that, The detection body (1) is electrically connected to the scanning probe (2) via a retraction mechanism (5). The scanning probe (2) includes a mounting base (3). A cleaning component (14) is connected to the upper side wall of the mounting base (3). A handle (4) and a marking component (22) are connected to the lower side wall of the mounting base (3). A probe assembly (25) is connected to the front side wall of the mounting base (3). The probe assembly (25) includes a small electric push rod (251) fixedly connected to the front side of the mounting base (3). The moving end of the small electric push rod (251) passes through the mounting base (3) and is connected to a lifting box (252). Multiple piston cylinders (26) are fixedly connected to the side wall of the lifting box (252) away from the small electric push rod (251). Multiple piston rods (27) are movably inserted into the side wall of the piston cylinders (26) away from the lifting box (252). A piston plate (28) is fixedly connected to one end of the piston rod (27) located inside the piston cylinder (26). The piston plate (28) and piston cylinder (26) are fixedly connected by the same spring. The ends of the piston rods (27) extending out of the piston cylinder (26) are fixedly connected to the same flexible plate (29). The side wall of the flexible plate (29) away from the piston rods (27) is fixedly connected to multiple probe bodies (30). The probe bodies (30) are electrically connected to the detection body (1) through the retraction mechanism (5). The probe bodies (30) are electrically connected to the first wire (9) through the spring wire. The side wall of the lifting box (252) is connected to a water tank mechanism (31). The water tank mechanism (31) includes a water tank body (311) fixedly connected to the side wall of the lifting box (252). The water tank body (311) and the lifting box (252) are fixedly connected by the same bent pipe (312). The bent pipe (312) is provided with a control valve (32). The left inner wall of the water tank body (311) is connected to a piston seat (33) through a spring.

2. The steel pipe corrosion scanner according to claim 1, characterized in that, The take-up and release mechanism (5) includes a take-up and release box (51), which is fixedly connected to the side wall of the detection body (1). A partition (52) is fixedly connected to the inner wall of the take-up and release box (51). A connecting pipe (6) is rotatably connected to the side wall of the partition (52) via a bearing. A servo motor (7) is connected to the right side wall of the take-up and release box (51). The same take-up drum (8) is connected between the output end of the servo motor (7) and the connecting pipe (6). A first wire (9) is wound around the outer wall of the take-up drum (8). A second wire (10) is inserted into the front side wall of the detection body (1). The second wire (10) is away from the detection body. One end of the measuring body (1) passes through the take-up box (51) and the connecting pipe (6), and is electrically connected to the first wire (9) through the annular conductive mechanism. The side wall of the take-up box (51) has a through-hole. The end of the first wire (9) away from the take-up drum (8) passes through the through-hole and is inserted into the scanning probe (2). The lower side wall of the mounting base (3) is fixedly connected to a tension sensor (11). The detection end of the tension sensor (11) is connected to a mounting sleeve (13) through a pull rope (12). The end of the first wire (9) passes through the mounting sleeve (13). The mounting sleeve (13) is fixed to the first wire (9) by a positioning bolt.

3. The steel pipe corrosion scanner according to claim 1, characterized in that, The cleaning assembly (14) includes a cleaning box (141) fixedly connected to the upper side wall of the mounting base (3). Two arc-shaped plates (142) are connected to the rear side wall of the cleaning box (141). The rear side wall of the arc-shaped plates (142) is curved, and brush bristles are connected to the curved side wall. The arc-shaped plates (142) are hollow. Multiple dust suction holes (15) are provided on the side walls of both the arc-shaped plates (142) and the cleaning box (141). The arc-shaped plates (142) and the cleaning box (141) are connected. A dust collection box is connected to the front side wall of the mounting base (3). 16) The front side wall of the dust collection box (16) is connected to a vacuum pump (17). The suction end of the vacuum pump (17) is connected to the dust collection box (16). The dust collection box (16) is equipped with a filter element located at the suction end of the vacuum pump (17). The dust collection box (16) and the cleaning box (141) are fixedly connected by the same vacuum pipe (19). The front side wall of the cleaning box (141) is connected to a first electric push rod (20). The moving end of the first electric push rod (20) passes through the cleaning box (141) and is connected to an electric polishing roller (21).

4. The steel pipe corrosion scanner according to claim 1, characterized in that, The marking assembly (22) includes a placement plate (221) fixedly connected to the lower side wall of the mounting base (3). The front side wall of the placement plate (221) is connected to a marking electric push rod (222). The moving end of the marking electric push rod (222) passes through the placement plate (221) and is fixedly connected to a tube (23) via a force sensor. A piece of chalk (24) is inserted into the tube (23).

5. A steel pipe corrosion scanner according to claim 1, characterized in that, The mounting base (3) has four guide wheels (34) connected to the side wall away from the handle (4) by a bracket, and two of the guide wheels (34) on the same side are placed symmetrically at an angle.

6. The steel pipe corrosion scanner according to claim 1, characterized in that, The small electric push rod (251) and the lifting box (252) are connected by the same pressure sensor (18), and the pressure sensor (18) is electrically connected to the internal controller of the detection body (1).

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