Magnetic attraction device and flaw detection system

Abstract

The invention provides a magnetic attraction device and a flaw detection system, the magnetic attraction device comprises a magnetic attraction part and a shell, the magnetic attraction part is arranged on the shell, the shell is provided with a plurality of gas flow channels, each gas flow channel is independently arranged, each gas flow channel comprises a plurality of sub-flow channels, and the sub-flow channels are arranged in the shell. And the two adjacent sub flow channels of each gas flow channel are perpendicular to each other. Therefore, due to the design that each gas flow channel is independently arranged and the adjacent sub flow channels are perpendicular to each other, the processing of the gas channels is simpler and more standardized, and the manufacturing difficulty is reduced.

Description

Technical Field

[0001] This application relates to the technical field of flaw detection, and particularly to a magnetic attraction device and a flaw detection system. Background Art

[0002] The flaw detection system includes a magnetic attraction device and an ultrasonic electromagnetic flaw detection sensor. The ultrasonic electromagnetic flaw detection sensor is arranged on the magnetic attraction device, and the ultrasonic electromagnetic flaw detection sensor can detect cracks or defects inside a metal component. The magnet of the magnetic attraction device has an adsorption effect on the detected metal material. Both the magnetic attraction device and the ultrasonic electromagnetic flaw detection sensor are provided with air channels, and high-pressure gas can flow through the air channels to between the ultrasonic electromagnetic flaw detection sensor and the detected metal component, reducing the friction between the ultrasonic electromagnetic flaw detection sensor and the metal component.

[0003] However, the circuit design of the air channels in the housing of the magnetic attraction device is relatively complex, making the processing of the air channels in the housing of the magnetic attraction device relatively complex. Summary of the Invention

[0004] This application provides a magnetic attraction device and a flaw detection system to solve the technical problem that the processing of the air channels in the housing of the magnetic attraction device is relatively complex.

[0005] In a first aspect, this application provides a magnetic attraction device. The magnetic attraction device includes a magnetic attraction member and a housing. The magnetic attraction member is arranged in the housing. The housing is provided with a plurality of gas flow channels, each gas flow channel is independently arranged, each gas flow channel includes a plurality of sub-flow channels, and two adjacent sub-flow channels of each gas flow channel are perpendicular to each other.

[0006] In some embodiments, the housing is provided with a first air inlet and a first air outlet. The plurality of gas flow channels include a first gas flow channel. The first gas flow channel includes a first sub-flow channel and a second sub-flow channel. The first sub-flow channel is arranged along the width direction of the housing, and the second sub-flow channel is arranged along the height direction of the housing. The first air inlet, the first sub-flow channel, the second sub-flow channel, and the first air outlet are sequentially connected.

[0007] In some embodiments, the first gas flow channel includes a third sub-flow channel. The third sub-flow channel is arranged along the height direction of the housing. The first air inlet, the third sub-flow channel, the first sub-flow channel, the second sub-flow channel, and the first air outlet are sequentially connected.

[0008] In some embodiments, the length of the second sub-flow channel is greater than the distance between the first sub-flow channel and the third sub-flow channel.

[0009] In some embodiments, the housing is further provided with a second air inlet and a second air outlet. The plurality of air channels further includes a second gas channel, and the second gas channel includes a fourth sub-channel and a fifth sub-channel. The second air inlet, the fourth sub-channel, the fifth sub-channel, and the second air outlet are sequentially connected. The fourth sub-channel is arranged along the length direction of the housing, and the fifth sub-channel is arranged along the height direction of the housing.

[0010] In some embodiments, the second gas channel includes a sixth sub-channel, and the sixth sub-channel is arranged along the height direction of the housing. The second air inlet, the sixth sub-channel, the fourth sub-channel, the fifth sub-channel, and the second air outlet are sequentially connected.

[0011] In some embodiments, the second gas channel further includes a seventh sub-channel, and the seventh sub-channel is arranged along the width direction of the housing. The second air inlet, the sixth sub-channel, the fourth sub-channel, the fifth sub-channel, the seventh sub-channel, and the second air outlet are sequentially connected.

[0012] In some embodiments, the second gas channel further includes an eighth sub-channel, and the eighth channel is arranged along the length direction of the housing. The second air inlet, the sixth sub-channel, the fourth sub-channel, the fifth sub-channel, the eighth sub-channel, the seventh sub-channel, and the second air outlet are sequentially connected.

[0013] In some embodiments, the housing is further provided with a mounting cavity, and the magnetic attracting member is arranged in the mounting cavity. The mounting cavity has a first side and a second side arranged opposite to each other. The first sub-channel, the second sub-channel, the third sub-channel, and the sixth sub-channel are located on the first side, and the fifth sub-channel, the seventh sub-channel, and the seventh sub-channel are located on the second side.

[0014] In a second aspect, the present application provides a flaw detection system, and the flaw detection system includes the magnetic attracting device and the ultrasonic electromagnetic flaw detection sensor in any of the above embodiments. The ultrasonic electromagnetic flaw detection sensor is arranged at the bottom of the housing.

[0015] In the embodiments of the present application, a magnetic attracting device and a flaw detection system are provided. The magnetic attracting device includes a magnetic attracting member and a housing. The magnetic attracting member is arranged in the housing. The housing is provided with a plurality of gas channels, each gas channel is independently arranged, each gas channel includes a plurality of sub-channels, and two adjacent sub-channels of each gas channel are perpendicular to each other. In this way, each gas channel is independently arranged, and the design that adjacent sub-channels are perpendicular to each other makes the processing of the air channels simpler and more standardized, and reduces the manufacturing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings. Among them:

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the flaw detection system provided by the present application;

[0018] Figure 2 is Figure 1 a perspective view of the housing in

[0019] Figure 3 is Figure 1 a perspective view of a partial structure of the housing in

[0020] Figure 4 is Figure 1 a schematic structural diagram of the housing in

[0021] Figure 5 is Figure 4 a schematic structural diagram of another perspective of the housing in

[0022] Explanation of the reference numerals in the drawings:

[0023] Magnetic attraction device 10, ultrasonic electromagnetic flaw detection sensor 20, flaw detection system 30, housing 200, first air inlet 201, first air outlet 202, second air inlet 203, second air outlet 204, first gas flow channel 210, first sub-channel 211, second sub-channel 212, third sub-channel 213, second gas flow channel 220, fourth sub-channel 221, fifth sub-channel 222, sixth sub-channel 223, seventh sub-channel 224, eighth sub-channel 225, installation cavity 230, first side 240, second side 250. Detailed implementation manners

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0025] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0026] Please refer to Figures 1 to 5 , an embodiment of the present application provides a magnetic attraction device 10, which includes a magnetic attraction member (not shown in the figure) and a housing 200. The magnetic attraction member is disposed in the housing 200. The housing 200 is provided with a plurality of gas flow channels, each gas flow channel is independently arranged, each gas flow channel includes a plurality of sub-flow channels, and two adjacent sub-flow channels of each gas flow channel are perpendicular to each other. In this way, each gas flow channel is independently arranged, and the design that adjacent sub-flow channels are perpendicular to each other makes the processing of the air duct simpler and more standardized, reducing the manufacturing difficulty.

[0027] In addition, the structure of the sub-flow channels that are vertically connected reduces the resistance of gas flow, improves the efficiency of gas circulation, and thus more effectively reduces the friction between the housing 200 and the high-pressure gas.

[0028] In some embodiments, the magnetic attraction member can be made of a strong magnetic material such as neodymium iron boron (NdFeB) to ensure sufficient adsorption force. Specifically in implementation, the shape and size of the magnetic attraction member can be adjusted according to different application scenarios, such as circular, square or annular, etc.

[0029] In some embodiments, the housing 200 not only provides support for the magnetic attraction member, but also includes a plurality of independently arranged gas flow channels. The housing 200 can be made of high-strength aluminum alloy or other lightweight and high-strength materials to ensure its structural strength and durability. The gas flow channels can be directly milled into holes by a precision machine tool to avoid the complexity brought by traditional welding processes.

[0030] In some embodiments, each gas flow channel is independently arranged to ensure the independence and efficiency of gas circulation. For example, three independent gas flow channels are designed, and each flow channel is composed of a plurality of sub-flow channels, and the sub-flow channels are connected at a 90-degree angle. This can ensure that gas enters from different directions, increasing the gas coverage area.

[0031] In some embodiments, two adjacent sub-flow channels are perpendicular to each other to form an efficient gas transmission network. For example, the first sub-flow channel extends vertically downward, the second sub-flow channel extends horizontally, and the third sub-flow channel extends vertically upward again, and so on, forming a complex but efficient gas transmission path.

[0032] In some embodiments, each sub-channel is processed by drilling. Compared with the existing milling method. Drilling has higher precision and a simpler operation process than milling, reducing the processing difficulty and cost.

[0033] In addition, the channels formed by drilling usually have smoother inner walls, reducing the resistance of gas flow and improving the efficiency of gas circulation. The drilling processing method can more precisely control the channel dimensions, reducing material deformation and stress concentration, thereby reducing waste generation and maximizing the utilization of raw materials.

[0034] In some embodiments, the housing 200 is provided with a first air inlet 201 and a first air outlet 202. The plurality of gas channels include a first gas channel 210. The first gas channel 210 includes a first sub-channel 211 and a second sub-channel 212. The first sub-channel 211 is arranged along the width direction of the housing 200, and the second sub-channel 212 is arranged along the height direction of the housing 200. The first air inlet 201, the first sub-channel 211, the second sub-channel 212, and the first air outlet 202 are connected in sequence. Thus, by reasonably designing the direction and connection mode of the gas channels, the path of the gas from the first air inlet 201 to the first air outlet 202 is optimized, reducing the gas flow resistance.

[0035] In addition, the first sub-channel 211 is arranged along the width direction of the housing 200, and the second sub-channel 212 is arranged along the height direction of the housing 200. This vertically connected design can effectively utilize the space and improve the gas transmission efficiency.

[0036] In some embodiments, the housing 200 is provided with a first air inlet 201 for introducing high-pressure gas. The housing 200 is provided with a first air outlet 202 for discharging the gas passing through the gas channels.

[0037] In some embodiments, the first sub-channel 211 is arranged along the width direction of the housing 200 to guide the gas into the second sub-channel 212. For example, a numerical control drill is used to drill a hole in the width direction of the housing 200 with a hole diameter of 2 mm, and the length is set according to actual requirements. For example, a hole with a length of 30 mm is drilled in the width direction of the housing 200 to ensure that the hole wall is smooth and reduce the gas flow resistance.

[0038] In some embodiments, during actual processing, the first sub-channel 211 is drilled first, and then the second sub-channel 212 is drilled, and it is ensured that the two channels are accurately docked at a predetermined position. Coolant can be used to prevent overheating and ensure the smoothness and precision of the hole wall.

[0039] In some embodiments, the first gas flow channel 210 includes a third sub-flow channel 213 which is arranged along the height direction of the housing 200. The first air inlet 201, the third sub-flow channel 213, the first sub-flow channel 211, the second sub-flow channel 212 and the first air outlet 202 are communicated in sequence. Thus, by introducing the third sub-flow channel 213, the gas flow path is further refined and optimized, ensuring that the path of the gas from the air inlet to the air outlet is more reasonable, and reducing the gas flow resistance. In addition, the design of multiple vertically connected sections can effectively utilize the internal space of the housing 200, improve the gas transmission efficiency, and enable the gas to cover the probe surface in a shorter time.

[0040] In some embodiments, for example, in actual processing, a hole with a diameter of 2 mm and a length of 20 mm is drilled in the height direction of the housing 200, starting from the first air inlet 201. A hole with a diameter of 2 mm and a length of 50 mm is drilled in the width direction of the housing 200 to ensure its precise docking with the third sub-flow channel 213 at a certain intersection. A hole with a diameter of 2 mm and a length of 70 mm is drilled in the height direction of the housing 200 to ensure its precise docking with the first sub-flow channel 211 at another intersection and finally connected to the first air outlet 202. A high-precision CNC drill is used for the drilling operation to ensure the accuracy of the size and position of each hole. Coolant can be used to prevent overheating and ensure the smoothness and accuracy of the hole wall.

[0041] In some embodiments, the length of the second sub-flow channel 212 is greater than the distance between the first sub-flow channel 211 and the third sub-flow channel 213. Thus, by extending the second sub-flow channel 212 and ensuring its precise docking with other flow channels.

[0042] In some embodiments, the housing 200 is further provided with a second air inlet 203 and a second air outlet 204. The plurality of airway channels further includes a second gas flow channel 220 which includes a fourth sub-flow channel 221 and a fifth sub-flow channel 222. The second air inlet 203, the fourth sub-flow channel 221, the fifth sub-flow channel 222 and the second air outlet 204 are communicated in sequence. The fourth sub-flow channel 221 is arranged along the length direction of the housing 200, and the fifth sub-flow channel 222 is arranged along the height direction of the housing 200. Thus, by introducing the second air inlet 203 and the second air outlet 204, the magnetic attraction device 10 has two independent gas flow channel systems, improving the flexibility and reliability of the system.

[0043] In addition, the dual-channel design provides redundancy. Even if one flow channel has a problem, the other flow channel can still work normally to ensure the continuous operation of the device.

[0044] Moreover, by reasonably designing the directions and connection manners of the fourth sub-channel 221 and the fifth sub-channel 222, the path of the gas from the air inlet to the air outlet is optimized, reducing the gas flow resistance. The sub-channel designs in different directions can effectively utilize the space, reduce turbulence and pressure fluctuations, and improve the gas transmission efficiency.

[0045] In some embodiments, the second gas channel 220 includes a sixth sub-channel 223 which is arranged along the height direction of the housing 200, and the second air inlet 203, the sixth sub-channel 223, the fourth sub-channel 221, the fifth sub-channel 222 and the second air outlet 204 are communicated in sequence. Thus, introducing the sixth sub-channel 223 provides an additional buffer space, which helps to smooth the gas flow, reduce turbulence and pressure fluctuations. The second air inlet 203, the sixth sub-channel 223, the fourth sub-channel 221, the fifth sub-channel 222 and the second air outlet 204 are communicated in sequence to ensure the smooth flow of the gas.

[0046] In some embodiments, for example, a sixth sub-channel 223 is drilled in the height direction of the housing 200 using a numerically controlled drilling machine, with a hole diameter of 2 mm and a length set according to actual requirements. For example, a sixth sub-channel 223 with a length of 20 mm is drilled in the height direction of the housing 200, and it is ensured that it is precisely docked with the fourth sub-channel 221 at a certain intersection point.

[0047] In some embodiments, the second gas channel 220 further includes a seventh sub-channel 224 which is arranged along the width direction of the housing 200, and the second air inlet 203, the sixth sub-channel 223, the fourth sub-channel 221, the fifth sub-channel 222, the seventh sub-channel 224 and the second air outlet 204 are communicated in sequence. Thus, by reasonably designing the directions and connection manners of the sixth sub-channel 223, the fourth sub-channel 221, the fifth sub-channel 222 and the seventh sub-channel 224, the path of the gas from the air inlet to the air outlet is optimized.

[0048] In some embodiments, the second gas channel 220 further includes an eighth sub-channel 225 which is arranged along the length direction of the housing 200, and the second air inlet 203, the sixth sub-channel 223, the fourth sub-channel 221, the fifth sub-channel 222, the eighth sub-channel 225, the seventh sub-channel 224 and the second air outlet 204 are communicated in sequence. Thus, by adding the eighth sub-channel 225 to the second gas channel 220 and ensuring its precise docking with the sixth sub-channel 223, the fourth sub-channel 221, the fifth sub-channel 222 and the seventh sub-channel 224.

[0049] In some embodiments, a sixth sub-channel 223 is drilled in the height direction of the housing 200, starting from the second air inlet 203. A fourth sub-channel 221 is drilled in the length direction of the housing 200 to ensure its precise docking with the sixth sub-channel 223 at a certain intersection. A fifth sub-channel 222 is drilled in the height direction of the housing 200 to ensure its precise docking with the fourth sub-channel 221 at another intersection. An eighth sub-channel 225 is drilled in the length direction of the housing 200 to ensure its precise docking with the fifth sub-channel 222 at a certain intersection. A seventh sub-channel 224 is drilled in the width direction of the housing 200 to ensure its precise docking with the eighth sub-channel 225 at a certain intersection and finally connected to the second air outlet 204.

[0050] In some embodiments, the housing 200 is further provided with an installation cavity 230, the magnetic attraction member is disposed in the installation cavity 230, the installation cavity 230 has a first side 240 and a second side 250 disposed opposite to each other, the first sub-channel 211, the second sub-channel 212, the third sub-channel 213 and the sixth sub-channel 223 are located on the first side 240, and the fifth sub-channel 222, the seventh sub-channel 224 and the seventh sub-channel 224 are located on the second side 250. Thus, by arranging the sub-channels in different directions on the first side 240 and the second side 250 of the installation cavity 230 respectively, the internal distribution of the housing 200 is more reasonable, making full use of the limited space. In addition, components with different functions (such as the magnetic attraction member and the gas flow channel) are distributed in different positions, reducing the interference between each other and improving the overall performance of the system.

[0051] Moreover, the reasonable layout design enhances the overall structural strength of the housing 200 and reduces the risk of damage caused by local stress concentration.

[0052] An embodiment of the present application further provides a flaw detection system 30, the flaw detection system 30 includes a magnetic attraction device 10 and an ultrasonic electromagnetic flaw detection sensor 20, and the ultrasonic electromagnetic flaw detection sensor 20 is disposed at the bottom of the housing 200.

[0053] In some embodiments, the ultrasonic electromagnetic flaw detection sensor 20 combines two technologies, ultrasonic testing (UT) and electromagnetic testing (ET), and can efficiently and accurately detect cracks or defects inside metal components. The ultrasonic electromagnetic flaw detection sensor 20 includes an ultrasonic transducer, a receiving transducer, a processor, an excitation coil, a detection coil, etc. During the detection process, the ultrasonic transducer emits high-frequency ultrasonic waves into the metal component. When encountering cracks or defects, part of the ultrasonic waves will be reflected back and captured by the receiving transducer. The processor analyzes the time difference and amplitude change of the reflected signal to determine the location and size of the defect. At the same time, the excitation coil generates an alternating magnetic field, which induces eddy currents on the surface and near-surface of the metal component. If there are cracks or defects, the distribution of the eddy currents will change, and the detection coil will capture the corresponding magnetic field change signal. The processor amplifies, filters, and digitizes the received ultrasonic and electromagnetic signals, and analyzes these signals through algorithms. Finally, the defects in the metal component are identified and the detection results are output.

[0054] For example, the ultrasonic electromagnetic flaw detection sensor 20 can be arranged at the bottom of the housing 200.

[0055] The magnetic attraction member can be a magnet. The magnet of the magnetic attraction device 10 can generate a magnetic attraction force on the workpiece (the metal component to be detected), so that the workpiece approaches the ultrasonic electromagnetic flaw detection sensor 20. The ultrasonic electromagnetic flaw detection sensor 20 can be provided with a gas flow channel. The flaw detection system 30 can also be provided with an air pump. The air flow generated by the air pump can pass through the gas flow channel (sequentially passing through the housing 200 and the ultrasonic electromagnetic flaw detection sensor 20) to generate an air film between the workpiece and the ultrasonic electromagnetic flaw detection sensor 20, thereby generating an air suspension force. When the magnetic attraction force and the air suspension force are balanced, a small but stable gap can be maintained between the workpiece and the ultrasonic electromagnetic flaw detection sensor 20, which helps to reduce the risk of interference between the ultrasonic electromagnetic flaw detection sensor 20 and the workpiece.

[0056] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0057] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof.

[0058] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A magnetic device, used in a flaw detection system, characterized in that: include: Magnetic parts; as well as The shell is provided with a plurality of gas flow channels, each of which is independently arranged, each of which includes a plurality of sub-flow channels, and two adjacent sub-flow channels of each gas flow channel are perpendicular to each other.

2. The magnetic attraction device according to claim 1, characterized in that: The shell is provided with a first air inlet and a first air outlet, the plurality of gas flow channels include a first gas flow channel, the first gas flow channel includes a first sub-flow channel and a second sub-flow channel, the first sub-flow channel is arranged along the width direction of the shell, the second sub-flow channel is arranged along the height direction of the shell, the first air inlet, the first sub-flow channel, the second sub-flow channel and the first air outlet are connected in sequence.

3. The magnetic attraction device according to claim 2, characterized in that: The first gas flow channel includes a third sub-flow channel, the third sub-flow channel is arranged along the height direction of the shell, and the first gas inlet, the third sub-flow channel, the first sub-flow channel, the second sub-flow channel and the first gas outlet are connected in sequence.

4. The magnetic attraction device according to claim 3, characterized in that: The length of the second sub-flow channel is greater than the distance between the first sub-flow channel and the third sub-flow channel.

5. The magnetic attraction device according to claim 1, characterized in that: The shell is also provided with a second air inlet and a second air outlet, the multiple air channels also include a second gas channel, the second gas channel includes a fourth sub-channel and a fifth sub-channel, the second air inlet, the fourth sub-channel, the fifth sub-channel and the second air outlet are connected in sequence, the fourth sub-channel is arranged along the length direction of the shell, and the fifth sub-channel is arranged along the height direction of the shell.

6. The magnetic attraction device according to claim 5, characterized in that: The second gas flow channel includes a sixth sub-flow channel, the sixth sub-flow channel is arranged along the height direction of the shell, and the second gas inlet, the sixth sub-flow channel, the fourth sub-flow channel, the fifth sub-flow channel and the second gas outlet are connected in sequence.

7. The magnetic attraction device according to claim 6, characterized in that: The second gas flow channel also includes a seventh sub-flow channel, and the seventh sub-flow channel is arranged along the width direction of the shell. The second air inlet, the sixth sub-flow channel, the fourth sub-flow channel, the fifth sub-flow channel, the seventh sub-flow channel and the second air outlet are connected in sequence.

8. The magnetic attraction device according to claim 7, characterized in that: The second gas flow channel also includes an eighth sub-flow channel, and the eighth flow channel is arranged along the length direction of the shell, and the second air inlet, the sixth sub-flow channel, the fourth sub-flow channel, the fifth sub-flow channel, the eighth sub-flow channel, the seventh sub-flow channel and the second air outlet are connected in sequence.

9. The magnetic attraction device according to claim, characterized in that: The shell is also provided with an installation cavity, and the magnetic attraction component is arranged in the installation cavity. The installation cavity has a first side and a second side arranged opposite to each other, the first sub-channel, the second sub-channel, the third sub-channel and the sixth sub-channel are located on the first side, and the fifth sub-channel, the seventh sub-channel and the seventh sub-channel are located on the second side.

10. A flaw detection system, characterized in that: include: The magnetic attraction device according to any one of claims 1 to 9; as well as An ultrasonic electromagnetic flaw detection sensor is arranged at the bottom of the shell.

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