A pulsed eddy current inspection apparatus and system

Abstract

The utility model discloses a kind of pulse eddy current testing devices, in the pulse eddy current testing device of the present application, since mounting bracket is arc-shaped arrangement, inner ring is defined to form in mounting bracket, mounting bracket is equipped with the notch of the intercommunication inner ring, so that the pulse eddy current testing device of the present application when using, staff can move entire pulse eddy current testing device, so that the pipe to be measured enters inner ring from notch, after staff signal excitation line and signal receiving line are all electrically connected with pulse eddy current instrument host computer, the detection result of detection module to the pipe to be measured can be passed to pulse eddy current instrument host computer by signal receiving line, so that staff can accurately understand the quality of the pipe to be measured by the display result on pulse eddy current instrument host computer. The setting of notch makes the pipe to be measured can enter or leave inner ring through notch, reduces the installation difficulty of the pulse eddy current testing device of the present application on the pipe to be measured.

Description

Technical Field

[0001] This utility model relates to the field of pulsed eddy current nondestructive testing structure technology, and in particular to a pulsed eddy current testing device and testing system. Background Technology

[0002] Ferromagnetic double-jacketed tube pressure vessels are widely used in modern petrochemical industrial production, often serving as core process equipment in production units. Typical examples include ultra-high pressure tubular reactors and linear quench heat exchangers in large ethylene plants. These double-jacketed tube pressure vessels often endure harsh conditions such as high temperature, high pressure, and high flow rate for extended periods. The inner tube section, in particular, is subjected not only to the erosion and corrosion of the internal medium but may also be subject to the reverse erosion of the external medium. Therefore, reports of corrosion leaks in the inner tube section of in-service double-jacketed tube pressure vessels are frequent.

[0003] Pulsed eddy current testing technology, as a new non-destructive testing technology that has been developing rapidly both domestically and internationally in recent years, has obvious advantages over traditional acoustic emission testing technology and digital X-ray testing technology. However, in current technology, when using pulsed eddy current testing technology, it is necessary to put the pulsed eddy current testing device on the pipe to be tested, and then move the pulsed eddy current testing device along the axial direction of the pipe to complete the testing of the entire pipe.

[0004] However, for some pipe fittings with a large vertical height, the installation of the pulse eddy current detection device on the pipe fitting is extremely inconvenient because the worker needs to put the pulse eddy current detection device on the pipe fitting from the top. Utility Model Content

[0005] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art. The first aspect of this utility model is to provide a pulse eddy current detection device that is easy to install on the pipe fitting to be tested; the second aspect of this utility model is to provide a detection system.

[0006] According to the first aspect of the present invention, a pulsed eddy current detection device includes a mounting frame and multiple detection modules. The mounting frame is arc-shaped, with an inner ring defined within it. The mounting frame has a notch communicating with the inner ring, allowing the test tube to enter or leave the inner ring. Multiple detection modules are spaced apart along the circumference of the mounting frame on the inner ring wall. Each detection module includes an excitation coil, a receiving coil, a signal receiving line, and a signal excitation line. One end of the signal excitation line is electrically connected to the excitation coil, and the other end is electrically connected to the main unit of the pulsed eddy current instrument. One end of the signal receiving line is electrically connected to the receiving coil, and the other end is electrically connected to the main unit of the pulsed eddy current instrument.

[0007] The pulsed eddy current testing device of this utility model has at least the following beneficial effects: In the pulsed eddy current testing device of this application, because the mounting frame is arc-shaped and an inner ring is defined within the mounting frame, and a notch is provided on the mounting frame to connect to the inner ring, the operator can move the entire pulsed eddy current testing device during use, allowing the pipe under test to enter the inner ring through the notch. After the operator electrically connects both the signal excitation line and the signal receiving line to the main unit of the pulsed eddy current instrument, the testing results of the testing module on the pipe under test can be transmitted to the main unit of the pulsed eddy current instrument through the signal receiving line, so that the operator can accurately understand the quality of the pipe under test through the display results on the main unit of the pulsed eddy current instrument. The notch design allows the pipe under test to enter or leave the inner ring through the notch, reducing the installation difficulty of the pulsed eddy current testing device on the pipe under test.

[0008] According to the pulse eddy current detection device of the first aspect of the present invention, the mounting bracket includes a first connecting segment and a second connecting segment, the first connecting segment and the second connecting segment together define an inner ring, the first connecting segment has a first connecting end and a first hinge end opposite to each other, the second connecting segment has a second connecting end and a second hinge end opposite to each other, the first hinge end and the second hinge end are hinged together, a notch is formed between the first connecting end and the second connecting end, and the first connecting end and the second connecting end are detachably connected by a connecting structure.

[0009] According to the pulse eddy current detection device of the first aspect of the present invention, the connection structure is a threaded connector, a first connecting hole is provided on the first connecting end, a second connecting hole is provided on the second connecting end, the threaded connector passes through the first connecting hole and is threadedly connected to the hole wall of the second connecting hole.

[0010] According to the pulsed eddy current detection device of the first aspect of the present invention, the first connecting end has a first protrusion structure and a first groove structure distributed along the axial direction of the mounting frame, and the second connecting end has a second protrusion structure and a second groove structure distributed along the axial direction of the mounting frame. A first connecting hole is provided on the first protrusion structure, a second connecting hole is provided on the second protrusion structure, the first protrusion structure passes through the second groove structure, and the second protrusion structure passes through the first groove structure.

[0011] According to the pulse eddy current detection device of the first aspect of the present invention, the detection module further includes a housing, the housing being detachably connected to the inner ring wall of the inner ring, a receiving cavity being formed inside the housing, the cavity wall of the receiving cavity being provided with an opening communicating with the outside, the excitation coil and the receiving coil being disposed inside the receiving cavity, and the signal excitation line and the signal receiving line extending to the outside of the receiving cavity through the opening.

[0012] According to the pulse eddy current detection device of the first aspect of the present invention, the housing is provided with a connecting protrusion, the connecting protrusion is provided with a first thread, the inner ring wall of the inner ring is provided with a mounting hole, the wall of the mounting hole is provided with a second thread adapted to the first thread, and the connecting protrusion and the wall of the mounting hole are detachably connected by the first thread and the second thread.

[0013] According to the pulse eddy current detection device of the first aspect of the present invention, the mounting hole is a through hole with an opening on the connecting protrusion and communicating with the mounting hole. The signal excitation line and the signal receiving line both pass through the opening and the mounting hole in sequence and extend to the outside.

[0014] The pulse eddy current detection device according to the first aspect of the present invention further includes drive wheels, and drive wheels are detachably connected to both ends of the mounting bracket in the notch width direction.

[0015] According to the pulse eddy current detection device of the first aspect of the present invention, it further includes a roller module. Along the circumference of the mounting frame, a plurality of roller modules are spaced apart on the inner wall of the inner ring. The roller module includes a mounting base and a roller. The mounting base is detachably connected to the inner wall of the inner ring, and the roller is rotatably mounted on the mounting base.

[0016] The detection system provided according to the second aspect of the present invention includes the pulsed eddy current detection device provided in the first aspect of the present invention; the detection system also includes a pulsed eddy current instrument host, which is electrically connected to each signal excitation line and to each signal receiving line respectively.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the pulsed eddy current detection device when the first and second connecting ends are connected according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the pulsed eddy current detection device when the first connection end and the second connection end are separated according to an embodiment of the present invention. Figure 3 for Figure 1 A schematic diagram of the first connecting section of the pulsed eddy current detection device shown. Figure 4 for Figure 1 A schematic diagram of the detection module of the pulsed eddy current detection device shown. Figure 5This is a schematic diagram of the structure of a pulsed eddy current detection device according to another embodiment of the present invention; Figure 6 This is a schematic diagram of the detection system according to an embodiment of the present invention.

[0019] Figure label: Pulsed eddy current detection device 10; Pulsed eddy current instrument main unit 20; Mounting bracket 100; Inner ring 101; Notch 102; Mounting hole 103; First connecting section 110; First connecting end 111; First connecting hole 111a; First protruding structure 111b; First groove structure 111c; First hinge end 112; Second connecting section 120; Second connecting end 121; Second connecting hole 121a; Second hinge end 122; Detection module 200; excitation coil 210; receiving coil 220; signal receiving line 230; signal excitation line 240; housing 250; receiving cavity 251; opening 251a; connecting protrusion 252; first thread 252a; Drive wheels 300; Roller module 400; Mounting base 410; Roller 420; Threaded connector 500. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] The following is for reference. Figures 1 to 5 The pulsed eddy current detection device 10 of the first aspect of this application will be described in detail.

[0025] refer to Figure 1 , Figure 2 and Figure 4 According to a first aspect of the present invention, a pulsed eddy current detection device 10 includes a mounting frame 100 and a plurality of detection modules 200. The mounting frame 100 is arc-shaped and has an inner ring 101 defined within it. The mounting frame 100 has a notch 102 communicating with the inner ring 101, which allows the pipe to be tested to enter or leave the inner ring 101. The plurality of detection modules 200 are spaced apart along the circumference of the mounting frame 100 on the inner ring wall of the inner ring 101. Each detection module 200 includes an excitation coil 210, a receiving coil 220, a signal receiving line 230, and a signal excitation line 240. One end of the signal excitation line 240 is electrically connected to the excitation coil 210, and the other end of the signal excitation line 240 is electrically connected to the pulsed eddy current instrument host 20. One end of the signal receiving line 230 is electrically connected to the receiving coil 220, and the other end of the signal receiving line 230 is electrically connected to the pulsed eddy current instrument host 20.

[0026] When the pulsed eddy current testing device 10 of this application is used, the operator can electrically connect the signal excitation line 240 and the signal receiving line 230 to the pulsed eddy current instrument host 20 respectively. The operator can drive the pulsed eddy current testing device 10 to move so that the pipe to be tested enters the inner ring 101 of the mounting frame 100 from the notch 102 of the mounting frame 100. At this time, the operator can drive the entire pulsed eddy current testing device 10 to spiral up or down along the axial direction of the pipe to be tested, so that the testing module 200 can complete the scanning and testing of the entire pipe to be tested.

[0027] It is understood that in the pulse eddy current testing device 10 of this application, by providing a notch 102 on the mounting bracket 100 that connects to the inner ring 101, the operator can drive the pulse eddy current testing device 10 so that the pipe to be tested enters the inner ring 101 through the notch 102, thereby completing the installation of the pulse eddy current testing device 10 on the pipe to be tested. The operator does not need to put the pulse eddy current testing device 10 on the pipe to be tested from the top of the pipe to be tested, thus making the installation of the pulse eddy current testing device 10 on the pipe to be tested more convenient.

[0028] It should be noted that the specific number of detection modules 200 can be reasonably selected by the staff based on the size of the inner ring 101. When the size of the inner ring 101 is small, four detection modules 200 can be set on the inner ring 101, and when the size of the inner ring 101 is large, eight detection modules 200 can be set on the inner ring 101.

[0029] In some embodiments of this utility model, reference is made to Figure 1 and Figure 2 The mounting bracket 100 includes a first connecting segment 110 and a second connecting segment 120. The first connecting segment 110 and the second connecting segment 120 together define an inner ring 101. The first connecting segment 110 has a first connecting end 111 and a first hinge end 112. The second connecting segment 120 has a second connecting end 121 and a second hinge end 122. The first hinge end 112 and the second hinge end 122 are hinged together. A notch 102 is formed between the first connecting end 111 and the second connecting end 121. The first connecting end 111 and the second connecting end 121 are detachably connected by a connecting structure.

[0030] Understandably, when the worker applies the pulse eddy current testing device 10 of this application to the pipe fitting under test, the worker can disconnect the connection structure between the first connecting end 111 and the second connecting end 121. At this time, the worker can drive the first connecting end 111 and the second connecting end 121 away from each other to increase the gap 102. Thus, the worker can drive the mounting frame 100 to move so that the pipe fitting under test can smoothly enter the inner ring 101 through the gap 102. Then, the worker can drive the first connecting end 111 and the second connecting end 121 to move closer together and connect the first connecting end 111 and the second connecting end 121 through the connecting structure. At this time, the entire mounting frame 100 is ring-shaped. The worker can drive the mounting frame 100 to move spirally along the axial direction of the pipe fitting under test so that the pulse eddy current testing device 10 of this application can complete the testing of the entire pipe fitting under test.

[0031] In some embodiments of this utility model, reference is made to Figure 2 The connection structure is a threaded connector 500. The first connecting end 111 is provided with a first connecting hole 111a, and the second connecting end 121 is provided with a second connecting hole 121a. The threaded connector 500 passes through the first connecting hole 111a and is threadedly connected to the hole wall of the second connecting hole 121a.

[0032] Understandably, by using the threaded connector 500, which is respectively inserted into the first connecting hole 111a and the second connecting hole 121a, the worker can quickly connect the first connecting end 111 and the second connecting end 121. By disengaging the threaded connector 500 from the first connecting hole 111a or the second connecting hole 121a, the worker can quickly separate the first connecting end 111 and the second connecting end 121. The threaded connector 500 enables a detachable connection between the first connecting end 111 and the second connecting end 121, making the connection and disassembly between the first connecting end 111 and the second connecting end 121 more convenient.

[0033] In some embodiments of this utility model, reference is made to Figure 2 and Figure 3 The first connecting end 111 has a first protrusion structure 111b and a first groove structure 111c distributed along the axial direction of the mounting frame 100. The second connecting end 121 has a second protrusion structure and a second groove structure distributed along the axial direction of the mounting frame 100. A first connecting hole 111a is provided on the first protrusion structure 111b, and a second connecting hole 121a is provided on the second protrusion structure. The first protrusion structure 111b passes through the second groove structure, and the second protrusion structure passes through the first groove structure 111c.

[0034] Understandably, when connecting the first connecting end 111 and the second connecting end 121, after the worker drives the first connecting end 111 and the second connecting end 121 to approach each other, the first protruding structure 111b just fits into the second groove structure, and the second protruding structure just fits into the first groove structure 111c. At this time, the first protruding structure 111b and the second protruding structure are distributed along the axial direction of the inner ring 101, and the first connecting hole 111a on the first protruding structure 111b and the second connecting hole 121a on the second protruding structure can just connect. By inserting the threaded connector 500 into the first connecting hole 111a and the second connecting hole 121a respectively, the worker can achieve a quick connection between the first connecting end 111 and the second connecting end 121.

[0035] It is understandable that the arrangement of the first protrusion structure 111b and the first groove structure 111c on the first connecting end 111, and the arrangement of the second protrusion structure and the second groove structure on the second connecting end 121, makes the connection between the first connecting end 111 and the second connecting end 121 more compact and stable after they are connected.

[0036] In some embodiments of this utility model, reference is made to Figure 4The detection module 200 also includes a housing 250, which is detachably connected to the inner ring wall of the inner ring 101. A receiving cavity 251 is formed inside the housing 250. The cavity wall of the receiving cavity 251 is provided with an opening 251a that communicates with the outside. The excitation coil 210 and the receiving coil 220 are both located inside the receiving cavity 251. The signal excitation line 240 and the signal receiving line 230 both extend to the outside of the receiving cavity 251 through the opening 251a.

[0037] It is understandable that by setting up the housing 250 and placing both the excitation coil 210 and the receiving coil 220 inside the receiving cavity 251, the housing 250 can protect the excitation coil 210 and the receiving coil 220.

[0038] Specifically, the excitation coil 210 has a regular hexagonal structure.

[0039] Specifically, the receiving coil 220 is rectangular in shape, and the detection module 200 may include two receiving coils 220, with a spacing of 50mm to 75mm between the two receiving coils 220.

[0040] In some embodiments of this utility model, reference is made to Figure 3 and Figure 4 The housing 250 is provided with a connecting protrusion 252, and the connecting protrusion 252 is provided with a first thread 252a. The inner ring wall of the inner ring 101 is provided with a mounting hole 103, and the hole wall of the mounting hole 103 is provided with a second thread that is adapted to the first thread 252a. The connecting protrusion 252 and the hole wall of the mounting hole 103 are detachably connected through the first thread 252a and the second thread.

[0041] It is understandable that by providing a first thread 252a on the connecting protrusion 252 and a second thread on the wall of the mounting hole 103, the housing 250 can be directly and detachably installed on the inner ring wall of the inner ring 101 through the engagement between the first thread 252a and the second thread, thereby reducing the use of threaded parts such as bolts.

[0042] In a further embodiment of the present invention, the mounting hole 103 is a through hole, the opening 251a is provided on the connecting protrusion 252 and communicates with the mounting hole 103, and the signal excitation line 240 and the signal receiving line 230 both pass through the opening 251a and the mounting hole 103 in sequence and extend to the outside.

[0043] It is understood that each detection module 200 has a signal excitation line 240 and a signal receiving line 230 that need to be electrically connected to the pulse eddy current instrument host 20. The pulse eddy current detection device 10 of this application has multiple detection modules 200, resulting in the entire pulse eddy current detection device 10 having multiple signal excitation lines 240 and multiple signal receiving lines 230. In this application, by connecting the opening 251a to the mounting hole 103, the signal excitation line 240 and signal receiving line 230 within each detection module 200 are connected. All 0 can be guided to the standard output through the mounting hole 103, which improves the routing standardization of the signal excitation line 240 and signal receiving line 230 in the pulse eddy current detection device 10 of this application; since the inner ring 101 of the mounting bracket 100 needs to accommodate the pipe to be tested, by leading the signal excitation line 240 and signal receiving line 230 out of the inner ring 101 through the mounting hole 103, the influence of the pipe to be tested on the signal excitation line 240 and signal receiving line 230 during the movement of the pulse eddy current detection device 10 along the surface of the pipe to be tested can be reduced.

[0044] Furthermore, the outer ring surface of the mounting bracket 100 is provided with a groove, and the mounting hole 103 communicates with the groove. Consequently, the signal excitation line 240 and the signal receiving line 230 can be led out from the outer ring surface of the mounting bracket 100 under the guidance of the mounting hole 103, thereby allowing the signal excitation line 240 and the signal receiving line 230 to be kept as far away as possible from the test tube in the inner ring 101, thus reducing the influence of the test tube on the signal excitation line 240 and the signal receiving line 230 during the movement of the pulse eddy current detection device 10 along the surface of the test tube.

[0045] In some embodiments of this utility model, reference is made to Figure 5 The pulsed eddy current detection device 10 also includes a drive wheel 300, and the drive wheel 300 is detachably connected to both ends of the mounting bracket 100 in the width direction of the notch 102.

[0046] Understandably, by installing the drive wheel 300 on the mounting bracket 100, the operator can more easily drive the entire pulse eddy current testing device 10 to move along the axial direction of the pipe to be tested under the action of the drive wheel 300.

[0047] In some embodiments of this utility model, reference is made to Figure 1 and Figure 2 The pulsed eddy current detection device 10 also includes a roller module 400. Along the circumference of the mounting frame 100, multiple roller modules 400 are spaced apart on the inner wall of the inner ring 101. The roller module 400 includes a mounting base 410 and a roller 420. The mounting base 410 is detachably connected to the inner wall of the inner ring 101, and the roller 420 is rotatably mounted on the mounting base 410.

[0048] Understandably, by setting the roller module 400, on the one hand, the roller 420 can contact the surface of the pipe to be tested in the inner ring 101, so that the detection module 200 can leave a certain gap with the surface of the pipe to be tested, thereby protecting the detection module 200. On the other hand, when the operator drives the pulse eddy current detection device 10 to move along the surface of the pipe to be tested, the roller 420 can roll along the surface of the pipe to be tested, thereby reducing the friction between the pulse eddy current detection device 10 and the pipe to be tested, making the movement of the pulse eddy current detection device 10 along the surface of the pipe to be tested smoother.

[0049] The following is for reference. Figure 6 The detection system of the second aspect of this application will be described in detail.

[0050] refer to Figure 6 The detection system provided according to the second aspect of the present invention includes the pulsed eddy current detection device 10 provided in the first aspect of the present invention; the detection system also includes a pulsed eddy current instrument host 20, which is electrically connected to each signal excitation line 240 and to each signal receiving line 230 respectively.

[0051] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pulsed eddy current detection device, characterized in that, include: The mounting bracket is arc-shaped and has an inner ring defined within it. The mounting bracket has a notch that connects to the inner ring, allowing the pipe fitting to be tested to enter or leave the inner ring. Multiple detection modules are spaced apart circumferentially on the inner wall of the inner ring of the mounting bracket. Each detection module includes an excitation coil, a receiving coil, a signal receiving line, and a signal excitation line. One end of the signal excitation line is electrically connected to the excitation coil, and the other end of the signal excitation line is used to electrically connect to the main unit of the pulse eddy current instrument. One end of the signal receiving line is electrically connected to the receiving coil, and the other end of the signal receiving line is used to electrically connect to the main unit of the pulse eddy current instrument.

2. The pulsed eddy current detection device according to claim 1, characterized in that, The mounting bracket includes a first connecting segment and a second connecting segment, which together define the inner ring. The first connecting segment has a first connecting end and a first hinge end, and the second connecting segment has a second connecting end and a second hinge end. The first hinge end and the second hinge end are hinged together, and the notch is formed between the first connecting end and the second connecting end. The first connecting end and the second connecting end are detachably connected by a connecting structure.

3. The pulsed eddy current detection device according to claim 2, characterized in that, The connection structure is a threaded connector. The first connection end is provided with a first connection hole, and the second connection end is provided with a second connection hole. The threaded connector passes through the first connection hole and is threadedly connected to the hole wall of the second connection hole.

4. The pulsed eddy current detection device according to claim 3, characterized in that, The first connecting end has a first protrusion structure and a first groove structure distributed along the axial direction of the mounting bracket, and the second connecting end has a second protrusion structure and a second groove structure distributed along the axial direction of the mounting bracket. The first connecting hole is provided on the first protrusion structure, the second connecting hole is provided on the second protrusion structure, the first protrusion structure passes through the second groove structure, and the second protrusion structure passes through the first groove structure.

5. The pulsed eddy current detection device according to claim 1, characterized in that, The detection module also includes a housing, which is detachably connected to the inner wall of the inner ring. A receiving cavity is formed inside the housing, and the cavity wall of the receiving cavity has an opening that communicates with the outside. The excitation coil and the receiving coil are both located inside the receiving cavity, and the signal excitation line and the signal receiving line both extend outside the receiving cavity through the opening.

6. The pulsed eddy current detection device according to claim 5, characterized in that, The housing is provided with a connecting protrusion, the connecting protrusion is provided with a first thread, the inner ring wall of the inner ring is provided with a mounting hole, the wall of the mounting hole is provided with a second thread adapted to the first thread, and the connecting protrusion and the wall of the mounting hole are detachably connected by the first thread and the second thread.

7. The pulsed eddy current detection device according to claim 6, characterized in that, The mounting hole is a through hole, the opening is located on the connecting protrusion and communicates with the mounting hole, and the signal excitation line and the signal receiving line both pass through the opening and the mounting hole in sequence and extend to the outside.

8. The pulsed eddy current detection device according to claim 1, characterized in that, It also includes drive wheels, and the drive wheels are detachably connected to both ends of the mounting bracket in the width direction of the notch.

9. The pulsed eddy current detection device according to claim 1, characterized in that, It also includes roller modules. Along the circumference of the mounting frame, a plurality of roller modules are spaced apart on the inner wall of the inner ring. Each roller module includes a mounting base and a roller. The mounting base is detachably connected to the inner wall of the inner ring, and the roller is rotatably mounted on the mounting base.

10. A detection system, characterized in that, The detection system includes the pulsed eddy current detection device as described in any one of claims 1 to 9, and further includes a pulsed eddy current instrument host, which is electrically connected to each of the signal excitation lines and to each of the signal receiving lines.

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