Internal penetrating type eddy current detection equipment for detecting pipes

Abstract

The invention relates to the field of pipeline detection, in particular to internal penetrating type eddy current detection equipment for detecting pipes, which comprises an inner detection pipe and an outer auxiliary ring, the inner detection pipe is a main detection pipe, the front end and the rear end of the main detection pipe are rotatably connected with auxiliary pipes, the auxiliary pipes are connected with stepping motors matched with the main detection pipe, and the auxiliary pipes are fixedly connected with bunching rings. A plurality of laser distance measuring sensors which are distributed circumferentially are mounted on the bunching ring; a plurality of auxiliary supports are installed on the auxiliary pipe, each auxiliary support comprises a main frame rod and an auxiliary frame rod, a rolling wheel is hinged between the main frame rod and the auxiliary frame rod, a side electric adjusting device is installed in the auxiliary pipe, and the main frame rod and the auxiliary frame rod are fixedly connected with the two telescopic ends of the side electric adjusting device respectively. A plurality of detection frames are rotationally arranged on the main detection pipe, the induction end and the auxiliary mobile end can be conveniently and quickly adjusted at the variable step position of the pipeline in the detection process of the ultra-long pipeline, and the structure regulation and control management is arranged at the equipment end, so that the detection data transmission efficiency is ensured.

Description

Technical Field

[0001] The invention relates to an internal-through eddy current testing device for testing pipe materials, in particular to an internal-through eddy current testing device for testing pipe materials applied to the field of pipeline detection. Background Art

[0002] With the rapid development of industrial sectors such as metallurgy, chemical industry, aviation, aerospace, and nuclear industry, eddy current testing technology has been widely used due to its strong usability, non-contact coupling, and portable testing devices. Seamless pipes are mainly used in heat exchangers, and the liquid medium inside the pipes may cause corrosion of the pipe walls and accumulation of sediment. During the operation of the equipment, due to the vibration of the heat exchange pipes, collisions and frictions are formed with the support plates, resulting in wear at the contact parts between the outer walls of the heat exchange pipes and the support plates. The eddy current testing method using an internal-through coil is the most effective and reliable non-destructive testing method for detecting defects on the inner and outer walls of heat exchanger pipes to ensure the safe operation of the equipment, and it is also the most widely used non-destructive testing method in the detection of heat exchanger pipes.

[0003] To solve the problem of long pipeline flaw detection, a certain internal-through eddy current testing device in the market adopts the design of suspending the testing device and pulling it upward from the bottom of the vertically placed pipeline, and has a certain market share.

[0004] The specification of Chinese Patent CN114321563B discloses a feeding device and a pipeline detection device. The feeding device includes a feeding bin and a feeding main body. The feeding bin is a cylindrical structure with one end open. The space inside the feeding bin is defined as a feeding cavity, and the feeding cavity is communicated with the pipeline. A wire passing port is provided at one end of the feeding bin away from the opening. The feeding main body includes a push rod and a pulley. At least part of the structure of the push rod is movably penetrated in the feeding cavity. The pulley is connected to the push rod and is located in the feeding cavity. There are two pulleys, and the two pulleys enclose a wire passing space, and the wire passing space is arranged opposite to the wire passing port. The endoscope structure is arranged on the side of the pulley away from the wire passing port. This feeding device can protect the cable of the endoscope device from being scratched by the inner wall of the pipeline during the feeding and recycling processes, thereby reducing the damage rate of the endoscope device.

[0005] The existing internal-through eddy current flaw detection devices for pipeline detection are not easy to adjust the position of the probe according to the change of the pipe diameter, and it is not easy to ensure the probe is in contact with the pipe wall when the pipe diameter changes, which affects the accuracy of the detection results. Summary of the Invention

[0006] Aiming at the above-mentioned existing technology, the technical problem to be solved by the present invention is that the existing internal-through eddy current flaw detection devices for pipeline detection are not easy to adjust the position of the probe according to the change of the pipe diameter, and it is not easy to ensure the probe is in contact with the pipe wall when the pipe diameter changes.

[0007] In order to solve the above problems, the present invention provides an internal eddy current testing device for testing pipes, comprising an inner testing tube and an outer auxiliary ring, wherein the inner testing tube comprises a main testing tube, the front and rear ends of the main testing tube are rotatably connected with auxiliary tubes, the auxiliary tube is connected with a stepping motor matching the main testing tube, the auxiliary tube is fixedly connected with a cable tie ring, and a plurality of laser distance measuring sensors distributed in a circumference are installed on the cable tie ring;

[0008] A plurality of auxiliary brackets are installed on the auxiliary tube, and the auxiliary brackets include a main frame rod and a sub-frame rod, and rollers are hinged between the main frame rod and the sub-frame rod. A side electric adjustment device is installed in the auxiliary tube, and the main frame rod and the sub-frame rod are respectively fixedly connected to the two telescopic ends of the side electric adjustment device;

[0009] A plurality of detection racks are rotatably mounted on the main detection tube, the detection racks include movable racks, a detection probe is mounted on the top of the movable racks, a transmission shaft is connected between the movable racks and the main detection tube, a transmission wheel matching the transmission shaft is rotatably mounted in the main detection tube, a transmission belt is connected between the transmission wheel and the transmission shaft, and a damping pulley is connected to the transmission wheel;

[0010] A central electric adjustment device is installed in the main detection tube, and a damping column that fits the damping pulley is connected to the power telescopic end of the central electric adjustment device;

[0011] The outer auxiliary ring comprises a pair of arc frames, the inner ends of the arc frames are provided with arc guide rails, the inner ends of the arc guide rails are provided with marking ends, and a control box matching the marking ends is detachably provided on the arc frames.

[0012] In the above-mentioned internal penetration eddy current testing equipment, it is possible to realize rapid adjustment of the sensing end and the auxiliary moving end at the step change position of the pipeline during the testing process of the ultra-long pipeline to adapt to the change of the pipe diameter.

[0013] As a further improvement of the present application, a bearing is connected between the main frame rod and the auxiliary frame rod, a rotating shaft is connected between the roller and the bearing, and a pressure sensor is connected to the outer end of the bearing.

[0014] As a further improvement of the present application, the side electric adjustment device includes an electric push rod with two telescopic ends, and the two telescopic ends of the side electric adjustment device move synchronously. The central electric adjustment device includes a pair of electric push rods, and the pair of electric push rods can be independently controlled.

[0015] As a further improvement of the present application, traction lines are installed on both the main detection tube and the control box, a data line is passed through the traction line, a traction device is connected to the traction line, and the inner detection tube and the outer auxiliary ring are pulled synchronously.

[0016] As another improvement of the present application, a main accommodation groove matching the detection frame is provided on the main detection tube, a secondary accommodation groove matching the auxiliary support is provided on the auxiliary tube, and a pair of sliding holes are provided in the secondary accommodation groove. One ends of the main frame rod and the secondary frame rod are both connected with sliding platforms penetrating through the sliding holes, and the sliding platforms are fixedly connected with the telescopic ends of the side electric adjustment devices.

[0017] As another improvement of the present application, the marking end includes a sliding platform. An insertion tube is inserted on the sliding platform. A flexible conduit is connected between the insertion tube and the control box. An inkjet nozzle and a magnet plate are connected to the top end of the insertion tube. An electromagnet matching the magnet plate is installed in the sliding platform, and an ink storage cartridge and a micro pump matching the inkjet nozzle are installed on the control box.

[0018] As another improvement of the present application, an arc-shaped fixing plate is connected between a pair of arc-shaped frames, and the inner diameter of the arc-shaped frames is larger than the maximum outer diameter of the pipeline to be detected.

[0019] As a supplement to another improvement of the present application, it further includes a detection control system. The detection control system includes a controller installed in the control box. The outer auxiliary ring, the detection probe, the laser distance sensor, the stepping motor, the side electric adjustment device (21), the middle electric adjustment device (11) and the pressure sensor are all signal-connected to the controller. A data transmission module, a wireless communication module, a data processing module and an alarm module are connected to the controller. Displacement sensors signal-connected to the controller are installed in both the main detection tube and the auxiliary tube.

[0020] As a supplement to another improvement of the present application, the working end of the detection probe is hemispherical, and a buffer layer is laid on the working end.

[0021] As another improvement of the present application, the damping column includes a polyhedron column matching the number of detection frames, and damping belts matching the damping pulleys are laid on any side end faces of the polyhedron column.

[0022] In summary, this solution can achieve the convenience of quickly adjusting the induction end and the auxiliary mobile end at the stepped part of the pipeline during the detection of ultra-long pipelines to adapt to the change of the pipe diameter. And the structural adjustment and management are set at the equipment end, which is convenient for quick adjustment during the displacement of the equipment. Moreover, the data cable is only used for the transmission of pipeline detection data, ensuring the detection data transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the unfolded state diagram of the inner detection tube of the first and second embodiments of the present application;

[0024] Figure 2 It is the contracted state diagram of the inner detection tube of the first and second embodiments of the present application;

[0025] Figure 3 It is the three-dimensional diagram of the outer auxiliary ring of the third embodiment of the present application;

[0026] Figure 4 Cross-sectional view of the internal inspection tube for the first and second embodiments of this application;

[0027] Figure 5 is Figure 4 Schematic diagram of the structure at position A in

[0028] Figure 6 is Figure 4 Schematic diagram of the structure at position B in

[0029] Figure 7 Working state diagram of the external auxiliary ring for the third embodiment of this application;

[0030] Figure 8 is Figure 7 Schematic diagram of the structure at position C in

[0031] Figure 9 State change diagram when the internal inspection tube of the first embodiment of this application is unfolded;

[0032] Figure 10 State change diagram when the internal inspection tube of the first embodiment of this application is adjusted at the pipe step change;

[0033] Figure 11 State change diagram when the internal inspection tube of the second embodiment of this application is adjusted at the gradually changing pipe diameter;

[0034] Figure 12 System block diagram of the first and second embodiments of this application.

[0035] Description of the reference numerals in the figure:

[0036] 1 Main inspection tube, 11 Electric adjustment device in the middle, 2 Auxiliary tube, 21 Side electric adjustment device, 3 Cable bundle ring, 4 Auxiliary bracket, 401 Main frame rod, 402 Sub-frame rod, 403 Roller, 5 Inspection frame, 501 Movable bracket, 502 Inspection probe, 503 Transmission shaft, 6 Damping column, 7 Arc-shaped frame, 8 Marking end, 801 Slide, 802 Insertion tube, 9 Control box. Specific embodiments

[0037] The following will describe in detail the two embodiments of this application with reference to the accompanying drawings.

[0038] The first embodiment:

[0039] Figure 1-2 and Figure 4-10It is shown that an internal eddy current detection equipment for detecting pipes includes an inner detection tube and an outer auxiliary ring. The inner detection tube includes a main detection tube 1. The front and rear ends of the main detection tube 1 are rotatably connected with auxiliary tubes 2. The auxiliary tube 2 is connected with a stepper motor matching the main detection tube 1. An angle sensor is installed on the power shaft of the stepper motor. The auxiliary tube 2 is fixedly connected with a wire harness ring 3. A plurality of laser ranging sensors distributed in a circle are installed on the wire harness ring 3. A traction line is connected to the main detection tube 1. A data line connected to the controller is passed through the traction line. A traction device is connected to the traction line.

[0040] A plurality of auxiliary brackets 4 are installed on the auxiliary tube 2, and the auxiliary bracket 4 includes a main frame rod 401 and a sub-frame rod 402, and a roller 403 is hinged between the main frame rod 401 and the sub-frame rod 402, and a side electric adjustment device 21 is installed in the auxiliary tube 2, and the main frame rod 401 and the sub-frame rod 402 are respectively fixedly connected to the two telescopic ends of the side electric adjustment device 21; a bearing is connected between the main frame rod 401 and the sub-frame rod 402, and a rotating shaft is connected between the roller 403 and the bearing, and a pressure sensor is connected to the outer end of the bearing, and the data transmission end of the pressure sensor is connected to the main frame rod 401 or the sub-frame rod 402, and the sensing end of the pressure sensor is attached to the outer end of the bearing and surrounds and covers the outer wall of the bearing.

[0041] A plurality of detection racks 5 are rotatably mounted on the main detection tube 1. The detection rack 5 includes a movable bracket 501. A detection probe 502 is mounted on the top of the movable bracket 501. The working end of the detection probe 502 is hemispherical, and a buffer layer is laid on the working end. A transmission shaft 503 is connected between the movable bracket 501 and the main detection tube 1. A transmission wheel matching the transmission shaft 503 is rotatably connected in the main detection tube 1. A transmission belt is connected between the transmission wheel and the transmission shaft 503. A damping pulley 504 is connected to the transmission wheel.

[0042] A central electric adjustment device 11 is installed in the main detection tube 1, and a damping column 6 that fits with the damping pulley 504 is connected to the power telescopic end of the central electric adjustment device 11; the damping column 6 includes a polyhedral column whose number matches the detection frame 5, and a damping belt that matches the damping pulley 504 is laid on any side end face of the polyhedral column.

[0043] A main receiving groove matching the detection frame 5 is provided on the main detection tube 1, a secondary receiving groove matching the auxiliary bracket 4 is provided on the auxiliary tube 2, and a pair of sliding holes are provided in the secondary receiving groove, one end of the main frame rod 401 and the secondary frame rod 402 are connected with a slide table passing through the sliding holes, and the slide table is fixedly connected to the telescopic end of the side electric adjustment device 21.

[0044] The side electric adjustment device 21 includes an electric push rod with two telescopic ends. The two telescopic ends of the side electric adjustment device 21 move synchronously. The middle electric adjustment device includes a pair of electric push rods. Both of the pair of electric push rods can be independently controlled.

[0045] Figure 12 It is shown that it further includes a detection and control system. The detection and control system includes a controller installed in the control box. The outer auxiliary ring, the detection probe 502, the laser distance sensor, the stepping motor, the side electric adjustment device 21, the middle electric adjustment device 11 and the pressure sensor are all signal-connected to the controller. A data transmission module, a wireless communication module, a data processing module and an alarm module are connected to the controller; a wireless communication unit matching the wireless communication module is installed in the inner detection pipe, and the wireless communication unit is used for the transmission of detection data and control signals; a displacement sensor signal-connected to the controller is installed in the main detection pipe 1.

[0046] Figure 7 It is shown that when this solution is used, the pipeline is vertically placed and fixed, and then the whole device is placed at the bottom of the pipeline, and then the detection frame 5 is controlled to unfold until all the detection probes 502 are in contact with the inner wall of the pipeline. At this time, the detection frame 5 is controlled to unfold;

[0047] When the detection frame 5 of this solution unfolds, by controlling the middle electric push rod to work, the damping column 6 is displaced, and then the damping pulley 504 drives the transmission shaft 503 to rotate, and then the movable bracket 501 rotates, so that the detection probe 502 approaches the inner wall of the pipeline.

[0048] When this embodiment is used for the detection of a stepped pipeline: when the laser distance sensor in the detected pipe material detects that the pipe diameter change value exceeds the set value, the multiple auxiliary brackets 4 on the upper side are controlled to completely contract until the auxiliary brackets 4 are pulled to the pipe diameter change position. At this time, the auxiliary brackets 4 are controlled to unfold. After the auxiliary brackets 4 unfold and the detection frame 5 is driven to the pipe diameter change position, the unfolding amplitude of the detection frame 5 is adjusted;

[0049] When adjusting the unfolding amplitude of the detection frame 5, the middle electric adjustment device 11 is controlled to work according to the displacement amount of the telescopic end of the side electric adjustment device 21 when the auxiliary bracket 4 unfolds, so that the unfolding amplitude of the detection frame 5 is similar to that of the auxiliary bracket 4 when it unfolds, so as to ensure that the detection frame 5 is not overly squeezed by the pipe wall or far away from the pipe wall during operation, and ensure that the detection probe 502 is always in contact with the inner wall of the pipeline when passing through the stepped part of the pipeline.

[0050] This embodiment is easy to adapt to the detection of stepped pipes.

[0051] The second embodiment:

[0052] Figure 11 It shows the device adjustment process when detecting the pipeline at the gradually changing pipe diameter;

[0053] When the device is pulled upward, the pressure sensor detects the pressure change due to the change in the pipe diameter, and the side electric adjustment device 21 is extended and adjusted according to the pressure change detected by the pressure sensor, so as to ensure that the extrusion force on the roller 403 is not too large. When a large pressure is detected, the side electric adjustment device 21 is controlled to extend, and when a small pressure is detected, the side electric adjustment device 21 is controlled to contract;

[0054] When the side electric adjustment device 21 is adjusted, it can be set to start adjusting only when the pressure detected by the pressure sensor reaches the set value;

[0055] While the side electric adjustment device 21 is working, the middle electric adjustment device 11 near the adjusted auxiliary bracket 4 controls the telescopic end near the adjusted auxiliary bracket 4 to be adjusted synchronously, so that the damping column 6 is driven to move a certain distance, so that the detection probe 502 of the device is adjusted along with the adjustment of the auxiliary bracket 4 during the process of being pulled and moved;

[0056] After the device is displaced to the set distance A, the other telescopic end of the electric adjustment device 11 is controlled to work so that the set distance A is the spacing between the detection probes 502.

[0057] Then, after the device is displaced by the set distance B, the auxiliary side electric adjustment device 21 in the other auxiliary pipe 2 is controlled to work, so that the auxiliary bracket 4 on the other auxiliary pipe 2 is adjusted accordingly.

[0058] The third implementation method:

[0059] Figure 3 and Figure 7-8 As shown, the outer auxiliary ring includes a pair of arc frames 7, the inner end of the arc frame 7 is installed with an arc guide rail, a marking end 8 is installed in the arc guide rail, and a control box 9 matching the marking end 8 is detachably installed on the arc frame 7; an arc fixing plate is connected between the pair of arc frames 7, and the inner diameter of the arc frame 7 is larger than the maximum outer diameter of the pipeline to be inspected;

[0060] A traction line is installed on both the main detection tube 1 and the control box 9. A data line is passed through the traction line. A traction device is connected to the traction line, and the inner detection tube and the outer auxiliary ring are pulled synchronously. During synchronous traction, the outer auxiliary ring matches the position of the auxiliary tube 2 on the lower side of the inner detection tube.

[0061] The marking end 8 includes a slide 801, on which a cannula 802 is inserted, a flexible catheter is connected between the cannula 802 and the control box 9, the top of the cannula 802 is connected to an inkjet nozzle and a magnet plate, an electromagnet matching the magnet plate is installed in the slide 801, and an ink storage box and a micro pump matching the inkjet nozzle are installed on the control box 9.

[0062] The control end of this solution is set inside the outer auxiliary ring. The outer auxiliary ring is connected to the inner detection tube through a wireless signal. The outer auxiliary ring and the inner detection tube are synchronously towed. The data detected by the inner detection tube is quickly transmitted to the outer auxiliary ring through the wireless signal. By processing and analyzing the data, the defect points of the pipeline are determined and located. At this time, the controller controls the arc-shaped guide rail to work, so that the marking end 8 is driven to the position of the defect point. When positioning the defect point, it is determined by the eddy current detection result and the angle of rotation of the detection frame 5 driven by the stepping motor. After the marking end 8 moves to the position corresponding to the defect point on the outer wall of the pipeline, the defect point is quickly marked by an inkjet nozzle; so that relevant technical personnel can quickly identify the defect points on the pipeline;

[0063] In this embodiment, the defect position of the pipeline is inkjet marked on the outside of the pipeline by the outer auxiliary ring, and the outer auxiliary ring is arranged on the outside of the pipeline and synchronous data processing is carried out. Since the control box 9 is arranged on the outside of the pipeline and is synchronously towed with the inner detection tube, it is convenient to install enough hardware in the control box 9 to ensure fast and accurate analysis of the detection data. The pipeline data detected by the detection probe 502 is quickly transmitted to the control box 9 close to the outside of the pipeline through the wireless signal. The data processing module in the control box 9 quickly analyzes and processes the data to quickly determine the defect points of the pipeline, and then the outer auxiliary ring marks the defect points, which is convenient to mark the defect points while the inner detection tube is being migrated for detection, and has a high detection efficiency.

[0064] Moreover, the control box 9 is installed outside the pipeline, which is convenient for signal transmission to other external devices and convenient for the quick application of detection data.

[0065] In summary, this solution can realize that during the detection process of ultra-long pipelines, it is convenient to quickly adjust the induction end and the auxiliary mobile end at the pipeline step change to adapt to the change of the pipe diameter, and the structure regulation and management are set at the equipment end, which is convenient for quick adjustment during the displacement of the equipment, and the data line is only used for the transmission of pipeline detection data to ensure the detection data transmission efficiency.

[0066] Combined with the current actual requirements, the above-mentioned implementation manner adopted by this application, the protection scope is not limited to this. Within the knowledge scope of those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. An internal eddy current testing device for testing pipes. Features: The invention comprises an inner detection tube and an outer auxiliary ring, wherein the inner detection tube comprises a main detection tube (1), the front and rear ends of the main detection tube (1) are both rotatably connected to auxiliary tubes (2), the auxiliary tube (2) is connected to a stepping motor matching the main detection tube (1), the auxiliary tube (2) is fixedly connected to a wire harness ring (3), and the wire harness ring (3) is equipped with a plurality of laser distance measuring sensors distributed in a circumference; A plurality of auxiliary brackets (4) are installed on the auxiliary tube (2), and the auxiliary brackets (4) include a main frame rod (401) and a sub-frame rod (402), and a roller (403) is hinged between the main frame rod (401) and the sub-frame rod (402), and a side electric adjustment device (21) is installed in the auxiliary tube (2), and the main frame rod (401) and the sub-frame rod (402) are respectively fixedly connected to two telescopic ends of the side electric adjustment device (21); A plurality of detection racks (5) are rotatably mounted on the main detection tube (1), the detection rack (5) comprising a movable bracket (501), a detection probe (502) being mounted on the top of the movable bracket (501), a transmission shaft (503) being connected between the movable bracket (501) and the main detection tube (1), a transmission wheel matching the transmission shaft (503) being rotatably mounted inside the main detection tube (1), a transmission belt being connected between the transmission wheel and the transmission shaft (503), and a damping pulley (504) being connected to the transmission wheel; A central electric adjustment device (11) is installed in the main detection tube (1), and a damping column (6) that fits the damping pulley (504) is connected to the power telescopic end of the central electric adjustment device (11); The outer auxiliary ring comprises a pair of arc frames (7), the inner ends of the arc frames (7) are provided with arc guide rails, a marking end (8) is provided in the arc guide rails, and a control box (9) matching the marking end (8) is detachably provided on the arc frames (7).

2. The internal eddy current testing device for testing pipes according to claim 1, Features: A bearing is connected between the main frame rod (401) and the auxiliary frame rod (402), a rotating shaft is connected between the roller (403) and the bearing, and a pressure sensor is connected to the outer end of the bearing.

3. The internal eddy current testing device for testing pipes according to claim 2, Features: The side electric adjustment device (21) comprises an electric push rod with two telescopic ends, the two telescopic ends of the side electric adjustment device (21) move synchronously, and the middle electric adjustment device comprises a pair of electric push rods, and both of the pair of electric push rods can be independently controlled.

4. The internal eddy current testing device for testing pipes according to claim 3, Features: The main detection tube (1) and the control box (9) are both equipped with traction lines, a data line is passed through the traction lines, a traction device is connected to the traction lines, and the inner detection tube and the outer auxiliary ring are pulled synchronously.

5. The internal eddy current testing device for testing pipes according to claim 4, Features: A main accommodation groove matching the detection rack (5) is formed in the main detection pipe (1). A secondary accommodation groove matching the auxiliary support (4) is formed in the auxiliary pipe (2). A pair of sliding holes are formed in the secondary accommodation groove. One ends of the main frame rod (401) and the secondary frame rod (402) are both connected with sliding platforms penetrating through the sliding holes, and the sliding platforms are fixedly connected with the telescopic ends of the side electric adjusting devices (21).

6. An internal-penetration eddy current detection device for detecting pipes according to claim 5, characterized in that: The marking end (8) includes a sliding platform (801). A plug-in tube (802) is inserted into the sliding platform (801). A flexible conduit is connected between the plug-in tube (802) and the control box (9). An inkjet nozzle and a magnet plate are connected to the top end of the plug-in tube (802). An electromagnet matching the magnet plate is installed in the sliding platform (801). An ink storage box and a micro pump matching the inkjet nozzle are installed on the control box (9).

7. An internal-penetration eddy current detection device for detecting pipes according to claim 6, characterized in that: An arc-shaped fixing plate is connected between a pair of the arc-shaped frames (7). The inner diameter of the arc-shaped frame (7) is larger than the maximum outer diameter of the pipe to be detected.

8. An internal-penetration eddy current detection device for detecting pipes according to claim 7, characterized in that: It further includes a detection control system. The detection control system includes a controller installed in the control box. The outer auxiliary ring, the detection probe (502), the laser distance sensor, the stepping motor, the side electric adjusting device (21), the middle electric adjusting device (11) and the pressure sensor are all in signal connection with the controller. A data transmission module, a wireless communication module, a data processing module and an alarm module are connected to the controller. Displacement sensors in signal connection with the controller are installed in both the main detection pipe (1) and the auxiliary pipe (2).

9. An internal-penetration eddy current detection device for detecting pipes according to claim 8, characterized in that: The working end of the detection probe (502) is hemispherical, and a buffer layer is laid on the working end.

10. An internal-penetration eddy current detection device for detecting pipes according to claim 9, characterized in that: The damping column (6) includes a polyhedron column matching the number of the detection racks (5). Damping belts matching the damping pulleys (504) are laid on any side end faces of the polyhedron column.

Images