Pulsed eddy current corrosion detection equipment

Abstract

The invention discloses pulsed eddy current corrosion detection equipment which comprises a controller, a transverse movement detection frame, a linkage assembly, a driving assembly, a transverse movement detection mechanism and two supporting driving seats, the two supporting driving seats are installed on a pressure pipeline at intervals in the axial direction, and the transverse movement detection frame is arranged between the two supporting driving seats; the transverse movement detection mechanism comprises a transverse movement sliding block installed on the transverse movement detection frame in a matched mode, a detection probe is installed on the side, facing the pressure pipeline, of the transverse movement sliding block, the detection probe is connected with the controller, and the controller is used for controlling opening and closing of the detection probe and processing and analyzing received signals; the device is unique in structure and ingenious in design, adopts a combined design, can be directly mounted on a pressure pipeline to automatically and spirally move along the pipeline for corrosion detection, and effectively solves the problems of low efficiency and large error of existing manual pipeline corrosion detection.

Description

Technical Field

[0001] This invention belongs to the field of pipeline corrosion detection technology, specifically relating to a pulsed eddy current corrosion detection device. Background Technology

[0002] In industries such as petroleum, chemical, power, and metallurgy, ferromagnetic metal pipelines are widely used to transport and store high-temperature, high-pressure, and corrosive liquids or gases. Wear and fluid-accelerated corrosion can lead to extensive thinning of the ferromagnetic pipeline walls, even perforation, which can easily cause leaks, explosions, and other accidents. Corrosion reduces the pipeline's pressure-bearing capacity, resulting in personal injury and economic losses. Regular non-destructive testing and assessment of pipeline corrosion are necessary to ensure safe pipeline operation.

[0003] Traditional pipeline corrosion detection methods mainly rely on manual inspection or monitoring using equipment such as pressure sensors. During the inspection, the detection probe 53 needs to be directly attached to the outer wall of the pipeline coating or left at a certain distance. The inspector needs to conduct the inspection by holding the detection probe 53 directly or by holding the connecting rod connected to the detection probe 53. This inspection method is time-consuming, labor-intensive, and inefficient. At the same time, manual inspection by holding the probe is bound to have problems such as changes in the detection height and other human interference, resulting in detection errors and low accuracy of the detection results. Summary of the Invention

[0004] To address the shortcomings and problems of existing pipeline corrosion detection devices, this invention provides a pulsed eddy current corrosion detection device. This device has a unique structure and ingenious design, employing a modular design that allows it to be directly installed on pressure pipelines and automatically move spirally along the pipeline to perform corrosion detection. This effectively solves the problems of low efficiency and large errors in existing manual pipeline corrosion detection.

[0005] The solution adopted by this invention to solve its technical problem is as follows: a pulsed eddy current corrosion detection device, comprising a controller, a transverse detection frame, a linkage assembly, a drive assembly, a transverse detection mechanism, and two support drive seats. The two support drive seats are axially spaced and mounted on a pressure pipeline. The transverse detection frame is disposed between the two support drive seats and is arranged parallel to the pressure pipeline to be inspected. The transverse detection mechanism includes a transverse slider matched and mounted on the transverse detection frame. A detection probe is mounted on the side of the transverse slider facing the pressure pipeline. The detection probe is connected to the controller, which is used to control the opening and closing of the detection probe and to process and analyze the received signals. The support drive seat includes an annular fixed seat and an annular rotating seat. The system comprises a base, a drive shaft, a fixed gear ring, and a rotating gear. The fixed base is fixedly fitted onto the pressure pipeline. The rotating base is rotatably fitted onto the fixed base. The drive shaft is radially rotatably mounted on the outer ring surface of the rotating base, and its top end is connected to the end of the adjacent transverse detection frame via a linkage assembly. When the drive shaft rotates, it drives the transverse slider to move along the transverse detection frame via the linkage assembly. The fixed gear ring is fixedly mounted on the fixed base on the front side of the rotating base, with its teeth facing the rotating base. The rotating gear is fixedly fitted onto the drive shaft and meshes with the fixed gear ring. The drive assembly is mounted on the rotating base of either of the two supporting drive bases and is connected to the drive shaft on the same side.

[0006] The transverse detection frame includes guide rods spaced parallel to the pressure pipeline to be inspected. Right-angle seats are provided at both ends of the guide rods. Each right-angle seat includes a base plate rotatably mounted on a drive shaft. A vertical plate is vertically fixed to the end of the base plate away from the same-side fixed toothed ring. The front and rear ends of the guide rods are perpendicularly connected to the adjacent side vertical plates. A screw is spaced parallel to one side of the guide rod. The front and rear ends of the screw are rotatably mounted on the same-side vertical plates, and the front and rear ends of the screw are respectively connected to the drive shaft of the same-side support drive seat via two-sided linkage components. The transverse slider is fitted onto the guide rods and screws.

[0007] The linkage assembly includes a driving bevel gear and a driven bevel gear. The driving bevel gear is fixedly mounted on the drive shaft above the base plate, and the driven bevel gear is fixedly mounted on the bolt behind the driving bevel gear and meshes with the driving bevel gear.

[0008] The detection probe includes a housing, with a support rod connected to the horizontal sliding slider on the top of the housing. A high-frequency pulse eddy current probe and a low-frequency pulse eddy current probe are arranged sequentially from front to back inside the housing. Both the high-frequency pulse eddy current probe and the low-frequency pulse eddy current probe are connected to the controller.

[0009] The drive assembly includes a mounting platform fixedly mounted on a rotating base, a drive motor fixedly mounted on the mounting platform, the drive motor being connected to a controller, the motor shaft of the drive motor being oriented toward the drive shaft and being connected via a bevel gear set for transmission.

[0010] The rotating seat includes two symmetrically arranged semi-ring seats. The drive shaft is fixed radially to the outer arc surface of any half ring seat. Matching connecting platforms are provided at both ends of the two semi-ring seats. Bolt holes are provided on the connecting platforms. The two semi-ring seats are connected together by bolts to form a complete annular rotating seat.

[0011] The fixing base includes annular end bases symmetrically fixedly fitted onto the pressure tube to be tested. The end bases are composed of two semi-annular base bodies fixed together by bolts. The fixing toothed ring is composed of two semi-annular toothed ring bodies, which are respectively fixed to the rear end faces of the two base bodies of the front end base. The pressure tube to be tested between the two annular bases is fitted with a sleeve, which is composed of two symmetrically arranged half sleeves. Each half sleeve has a semi-annular flange at both ends and is coaxially fixed to the adjacent annular base by bolts.

[0012] An arc-shaped protective plate is provided between the detection probe and the outer wall of the pressure pipeline to be tested. The front and rear ends of the arc-shaped protective plate are respectively connected to the rotating seat of the support drive seat on the same side. A cooling pipe is provided on the arc-shaped protective plate and connected to a coolant circulator.

[0013] The beneficial effects of this invention: The pulse eddy current corrosion detection device provided by this invention adopts a modular design. Using two support drive seats and bolts, the pulse eddy current corrosion detection device provided in this embodiment can be quickly installed on the pressure pipeline to be inspected. During the inspection process, it is not necessary for the inspector to hold the detection probe or the connecting rod connected to the detection probe for inspection. The drive assembly drives the drive shaft of the front support drive seat to rotate. During the rotation of the drive shaft, the screw in the transverse detection frame rotates synchronously through the linkage assembly at the top, thereby driving the detection probe of the transverse detection mechanism to move along the outer wall of the pressure pipeline towards the rear support drive seat. During this process, the rotating... Under the constraint of the rotating gear and the fixed ring gear, the drive shaft drives the rotating seat and the transverse detection frame to rotate synchronously around the fixed seat. This causes the detection probe to move backward along the outer wall of the pressure pipe to detect pipe corrosion, while simultaneously rotating around the pressure pipe. This makes the detection path of the detection probe spiral around the pressure pipe, performing corrosion detection on the entire pressure pipe. This effectively improves the detection efficiency. Furthermore, since the support drive seat is coaxially mounted on the pressure pipe, the distance between the detection probe and the outer wall of the pressure pipe does not change when the detection probe moves along the spiral detection path, further reducing detection errors and improving the accuracy of the detection results. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0015] Figure 2This is a schematic diagram of the linkage component structure of the present invention. Figure 3 This is a schematic diagram of the support drive seat structure of the present invention.

[0016] Figure 4 This is a schematic diagram of the fixing base structure of the present invention.

[0017] Figure 5 This is a schematic diagram of the detection probe structure of the present invention.

[0018] Figure 6 This is a schematic diagram of the arc-shaped protective plate structure of the present invention.

[0019] Figure 7 This is a schematic diagram of the clamping component structure of the present invention.

[0020] The diagram shows a pressure pipe marked 1. 2 is the transverse detection frame, 21 is the guide rod, and 22 is the screw. 3 is the linkage component, 31 is the base plate, 32 is the vertical plate, 33 is the driving bevel gear, and 34 is the driven bevel gear. 4 is the support drive seat, 41 is the fixed seat, 411 is the end base, 4111 is the base body, 412 is the half sleeve, and 413 is the flange. 42 is a fixed gear ring, 421 is a semi-annular gear ring body, 43 is a rotating seat, 431 is a semi-annular seat, 44 is a drive shaft, and 45 is a rotating gear. 5 represents the transverse movement detection mechanism, 51 is the slider, 52 is the support rod, 53 is the detection probe, 531 is the housing, 532 is the high-frequency pulsed eddy current probe, and 533 is the low-frequency pulsed eddy current probe. 6 is an arc-shaped protective plate, and 61 is a connecting rod. 7 is the telescopic support cylinder. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0022] To address the problems mentioned in the background section, this embodiment provides a pulsed eddy current corrosion detection device, such as... Figure 1-5 As shown, the device includes a controller, a transverse detection frame 2, a linkage assembly 3, a drive assembly, a transverse detection mechanism 5, and two support drive seats 4. The two support drive seats 4 are coaxially spaced on the pressure pipeline 1. The transverse detection frame 2 is positioned between the two support drive seats 4 and is parallel to the pressure pipeline 1 to be inspected. The transverse detection mechanism 5 includes a transverse slider 51 that is matched and installed on the transverse detection frame 2. A detection probe 53 is installed on the side of the transverse slider 51 facing the pressure pipeline 1. The detection probe 53 is connected to the controller, which is used to control the opening and closing of the detection probe 53 and to process and analyze the received signals. Specifically: The detection probe 53 includes a housing 531. The top of the housing 531 is provided with a support rod 52 connected to the horizontal sliding block 51. Inside the housing 531, a high-frequency pulse eddy current probe 532 and a low-frequency pulse eddy current probe 533 are arranged sequentially from front to back. Both the high-frequency pulse eddy current probe 532 and the low-frequency pulse eddy current probe 533 are connected to a controller. The controller can use the high-frequency pulse eddy current probe 532 and the low-frequency pulse eddy current probe 533 to perform accurate detection on the surface and depth of the pressure pipeline 1 in sequence.

[0023] The support drive base 4 includes an annular fixed base 41, an annular rotating base 43, a drive shaft 444, a fixed gear ring 42, and a rotating gear 45. The fixed base 41 is fixedly sleeved on the pressure pipe 1, and the rotating base 43 is rotatably sleeved on the fixed base 41. The drive shaft 444 is radially rotatably mounted on the outer annular surface of the rotating base 43, and the top end of the drive shaft 444 is connected to the end of the adjacent side transverse detection frame 2 via a linkage assembly 3. When the drive shaft 444 rotates, it drives the transverse slider 51 to move along the transverse detection frame 2 via the linkage assembly 3. Specifically: The transverse inspection frame 2 includes a guide rod 21 arranged parallel to and spaced from the pressure pipeline 1 to be inspected. The front and rear ends of the guide rod 21 are provided with right-angle seats. The right-angle seats include a base plate 31 rotatably mounted on a drive shaft 444. The end of the base plate 31 away from the same-side fixed toothed ring 42 is vertically fixed with a vertical plate 32. The front and rear ends of the guide rod 21 are vertically connected to the adjacent side vertical plate 32. A screw 22 is arranged parallel to and spaced on one side of the guide rod 21. The front and rear ends of the screw 22 are rotatably mounted on the same-side vertical plate 32, and the front and rear ends of the screw 22 are respectively connected to the drive shaft 444 of the same-side support drive seat 4 through the two-sided linkage assembly 3. The transverse sliding block 51 is provided with a sliding hole matching the guide rod 21 and a screw hole matching the screw 22. The transverse sliding block 51 is matched and mounted on the guide rod 21 and the screw 22. When the screw 22 rotates, it will drive the transverse sliding block 51 to slide back and forth along the guide rod 21. The linkage assembly 3 includes a driving bevel gear 33 and a driven bevel gear 34. The driving bevel gear 33 is fixedly mounted on the drive shaft 444 above the base plate 31, and the driven bevel gear 34 is fixedly mounted on the bolt on the rear side of the driving bevel gear 33 and meshes with the driving bevel gear 33. Thus, when either drive rotates, the rotating drive shaft 444 will drive the screw 22 to rotate through the linkage assembly 3. When the screw 22 rotates, the transverse slider 51 will slide along the guide rod 21 under the constraint of the guide rod 21. During this process, the other drive shaft 444 will rotate synchronously with the drive shaft 444 that drives the screw 22 to rotate under the drive of the screw 22.

[0024] A fixed gear ring 42 is fixedly mounted on a fixed seat 41 on the front side of a rotating seat 43, and the fixed gear ring 42 and the fixed seat 41 are coaxially arranged. The teeth of the fixed gear ring 42 face the rotating seat 43. A rotating gear 45 is fixedly mounted on a drive shaft 444 and meshes with the fixed gear ring 42. A drive assembly is mounted on the rotating seat 43 of either of the two supporting drive seats 4 and is connected to the drive shaft 444 on the same side. Specifically: The drive assembly is mounted on the rotating base 43 of the front support drive seat 4 and is connected to the drive shaft 444 on the same side. The drive assembly includes a mounting platform fixed on the rotating base 43, on which a drive motor is fixed. The drive motor is connected to a controller, and the motor shaft of the drive motor faces the drive shaft 444 and is connected to it via a bevel gear set. When the drive motor is started by the controller, it drives the front drive shaft 444 to rotate. When the front drive shaft 444 rotates, it drives the screw 22 in the transverse detection frame 2 to rotate synchronously through the linkage assembly 3 at the top, thereby driving the detection probe 53 of the transverse detection mechanism 5 along the path of the drive shaft 444. As the outer wall of the pressure pipeline 1 moves towards the rearward support drive seat 4, the fixed toothed ring 42 is fixedly installed on the fixed seat 41. Therefore, when the front drive shaft 444 is driven to rotate, the rotating drive shaft 444 will be driven by the cooperation constraint between the rotating gear 45 and the fixed ring tooth, causing the drive shaft 444 to drive the rotating seat 43 and the transverse detection frame 2 to rotate synchronously around the fixed seat 41. This causes the detection probe 53 to move backward along the outer wall of the pressure pipeline 1 to perform pipeline corrosion detection, while rotating around the pressure pipeline 1. This makes the detection path of the detection probe 53 spiral around the pressure pipeline 1, thereby realizing the corrosion detection of the entire pressure pipeline 1.

[0025] Furthermore, the rotating seat 43 includes two symmetrically arranged semi-annular seats 431, with the drive shaft 444 radially fixed to the outer arc surface of any one of the semi-annular seats 431; both ends of the two semi-annular seats 431 are provided with matching connecting platforms, and bolt holes are provided on the connecting platforms. The two semi-annular seats 431 are connected together by bolts to form a complete annular rotating seat 43. The fixed seat 41 includes annular end bases 411 symmetrically fixed and fitted onto the pressure tube to be tested. The end bases 411 are composed of two semi-annular base bodies 4111 fixed together by bolts; the fixed toothed ring 42 is composed of two semi-annular toothed ring bodies 421, with the two semi-annular toothed ring bodies respectively fixed to the front end base. When the two semi-annular base bodies 4111 of the front end base 411 are fixed together by bolts to form a complete end base 411, the two semi-annular toothed ring bodies on the rear end faces of the two semi-annular base bodies 4111 will be connected and combined to form a complete fixed toothed ring 42. The pressure pipe to be tested between the two annular bases is fitted with a sleeve. The sleeve is composed of two symmetrically arranged semi-sleeves 412. Each semi-sleeve 412 has a semi-annular flange 413 at both ends, which is fixed together with the adjacent annular base by bolts to form a complete sleeve, which facilitates the installation of the support drive seat 4 on the pressure pipe 1 to be tested.

[0026] Compared with existing pipeline corrosion detection devices, the pulse eddy current corrosion detection device provided in this embodiment adopts a modular design. Using two support drive seats 4, the pulse eddy current corrosion detection device provided in this embodiment can be quickly installed on the pressure pipeline 1 to be inspected via bolts. During the detection process, it is not necessary for the inspector to hold the detection probe 53 or the connecting rod connected to the detection probe 53 for inspection. The drive assembly drives the drive shaft 444 of the front support drive seat 4 to rotate. During the rotation of the drive shaft 444, it drives the screw 22 in the transverse detection frame 2 to rotate synchronously through the linkage assembly 3 at the top, thereby driving the detection probe 53 of the transverse detection mechanism 5 to move along the outer wall of the pressure pipeline 1 towards the rear support drive seat 4. During this process, the rotating... Under the constraint of the rotating gear 45 and the fixed ring gear, the drive shaft 444 drives the rotating seat 43 and the transverse detection frame 2 to rotate synchronously around the fixed seat 41. This causes the detection probe 53 to move backward along the outer wall of the pressure pipe 1 to detect pipe corrosion, while simultaneously rotating around the pressure pipe 1. This makes the detection path of the detection probe 53 spiral around the pressure pipe 1, allowing for overall corrosion detection of the pressure pipe 1. This effectively improves the detection efficiency. Furthermore, since the support drive seat 4 is coaxially mounted on the pressure pipe 1, the distance between the detection probe 53 and the outer wall of the pressure pipe 1 does not change when the detection probe 53 moves along the spiral detection path, further reducing detection errors and improving the accuracy of the detection results. Example

[0027] The difference between Example 2 and Example 1 is as follows: Figure 6 As shown, an arc-shaped protective plate 66 is provided between the detection probe 5353 and the outer wall of the pressure pipeline 1 to be tested. The front and rear ends of the arc-shaped protective plate 6 are respectively connected to the rotating seat 43 of the support drive seat 4 on the same side. The arc-shaped protective plate 6 is provided with a cooling pipe and connected to a coolant circulator. Specifically: Both ends of the arc-shaped protective plate 6 are equipped with connecting rods 61. The other end of the connecting rods 61 is connected to the rotating seat 43 of the support drive seat 4 on the same side. When the rotating seat 43 of the support drive seat 4 rotates, the arc-shaped protective plate 6 will rotate synchronously with the rotating seat 43, isolating the high-temperature heat energy of the pressure pipeline 1 in the detection area of ​​the detection probe 53. Compared with the existing method of using temperature and humidity compensation to compensate and automatically adjust the probe parameters according to the real-time changes of ambient temperature and humidity to eliminate the influence of temperature and humidity on detection, the pulse eddy current corrosion detection equipment provided in this embodiment uses the arc-shaped protective plate 6 to directly isolate the high-temperature heat energy of the pressure pipeline 1 in the detection area of ​​the detection probe 53, effectively solving the problem that the monitoring accuracy of the detection probe 53 deteriorates significantly in high-temperature environments and temperature compensation is insufficient to overcome the deterioration of accuracy. Example

[0028] The difference between Example 3 and Example 2 is that, as Figure 7 As shown, clamping assemblies are provided in the end bases 411 at both ends of the fixed base 41. The clamping assemblies include multiple telescopic support cylinders 7 evenly arranged along the circumference. The telescopic support cylinders 7 are arranged radially, and the telescopic ends of the hydraulic support cylinders are all arranged inward. The telescopic support cylinders 7 are connected to a control mechanism. The control mechanism can control all telescopic support cylinders 7 to telescopically extend and retract synchronously, so that the end base 411 can be installed on pressure pipes 1 of different diameters, which improves the practicality of the pulse eddy current corrosion detection equipment provided in this embodiment.

[0029] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A pulsed eddy current corrosion detection apparatus, characterized by, The device includes a controller, a transverse detection frame, a linkage assembly, a drive assembly, a transverse detection mechanism, and two support drive seats. The two support drive seats are axially spaced and mounted on a pressure pipeline. The transverse detection frame is positioned between the two support drive seats and is parallel to the pressure pipeline to be inspected. The transverse detection mechanism includes a transverse slider that is matched and mounted on the transverse detection frame. A detection probe is mounted on the side of the transverse slider facing the pressure pipeline. The detection probe is connected to the controller, which controls the opening and closing of the detection probe and processes and analyzes the received signals. The support drive seats include an annular fixed seat, an annular rotating seat, a drive shaft, a fixed gear ring, and a rotating gear. The fixed seat is fixedly sleeved on the pressure pipeline, and the rotating seat is rotatably sleeved on the fixed seat. The drive shaft is radially rotatably mounted on the outer ring surface of the rotating seat, and the top end of the drive shaft is connected to the end of the adjacent side transverse detection frame through a linkage assembly. When the drive shaft rotates, it will drive the transverse slider to move along the transverse detection frame through the linkage assembly. The fixed toothed ring is fixedly mounted on the fixed seat on the front side of the rotating seat, and the teeth of the fixed toothed ring are set facing the rotating seat. The rotating gear is fixedly sleeved on the drive shaft and meshes with the fixed toothed ring. The drive assembly is mounted on the rotating seat of any one of the two support drive seats and is connected to the drive shaft on the same side.

2. The pulsed eddy current corrosion detection apparatus of claim 1, wherein, The transverse detection frame includes guide rods spaced parallel to the pressure pipeline to be inspected. Right-angle seats are provided at both ends of the guide rods. Each right-angle seat includes a base plate rotatably mounted on a drive shaft. A vertical plate is vertically fixed to the end of the base plate away from the same-side fixed toothed ring. The front and rear ends of the guide rods are perpendicularly connected to the adjacent side vertical plates. A screw is spaced parallel to one side of the guide rod. The front and rear ends of the screw are rotatably mounted on the same-side vertical plates, and the front and rear ends of the screw are respectively connected to the drive shaft of the same-side support drive seat via two-sided linkage components. The transverse slider is fitted onto the guide rods and screws.

3. The pulsed eddy current corrosion detection apparatus of claim 2, wherein, The linkage assembly includes a driving bevel gear and a driven bevel gear. The driving bevel gear is fixedly mounted on the drive shaft above the base plate, and the driven bevel gear is fixedly mounted on the bolt behind the driving bevel gear and meshes with the driving bevel gear.

4. The pulsed eddy current corrosion detection apparatus of claim 1, wherein, The detection probe includes a housing, with a support rod connected to the horizontal sliding slider on the top of the housing. A high-frequency pulse eddy current probe and a low-frequency pulse eddy current probe are arranged sequentially from front to back inside the housing. Both the high-frequency pulse eddy current probe and the low-frequency pulse eddy current probe are connected to the controller.

5. The pulsed eddy current corrosion detection apparatus of claim 1, wherein, The drive assembly includes a mounting platform fixedly mounted on a rotating base, a drive motor fixedly mounted on the mounting platform, the drive motor being connected to a controller, the motor shaft of the drive motor being oriented toward the drive shaft and being connected via a bevel gear set for transmission.

6. The pulsed eddy current corrosion detection apparatus of claim 1, wherein, The rotating seat includes two symmetrically arranged semi-ring seats. The drive shaft is fixed radially to the outer arc surface of any half ring seat. Matching connecting platforms are provided at both ends of the two semi-ring seats. Bolt holes are provided on the connecting platforms. The two semi-ring seats are connected together by bolts to form a complete annular rotating seat.

7. The pulsed eddy current corrosion detection apparatus of claim 1, wherein, The fixing base includes annular end bases symmetrically fixedly fitted onto the pressure tube to be tested. The end bases are composed of two semi-annular base bodies fixed together by bolts. The fixing toothed ring is composed of two semi-annular toothed ring bodies, which are respectively fixed to the rear end faces of the two base bodies of the front end base. The pressure tube to be tested between the two annular bases is fitted with a sleeve, which is composed of two symmetrically arranged half sleeves. Each half sleeve has a semi-annular flange at both ends and is coaxially fixed to the adjacent annular base by bolts.

8. The pulsed eddy current corrosion detection apparatus of claim 1, wherein, An arc-shaped protective plate is provided between the detection probe and the outer wall of the pressure pipeline to be tested. The front and rear ends of the arc-shaped protective plate are respectively connected to the rotating seat of the support drive seat on the same side. A cooling pipe is provided on the arc-shaped protective plate and connected to a coolant circulator.

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