Magnetic memory sensor for detecting corrosion of inner wall of furnace tube

Abstract

The utility model relates to the technical field of nondestructive testing, and particularly discloses a furnace tube inner wall corrosion detection magnetic memory sensor, which comprises a sensor body, the sensor body is an arc-shaped sensor, and the arc concave surface of the arc-shaped sensor is a detection end surface; a connecting handle is arranged on the sensor body, a cable hole is formed in the connecting handle in a penetrating manner, and a cable is arranged in the cable hole; a plurality of magneto-sensitive elements are arranged in the sensor body, the distances from the induction surfaces of the magneto-sensitive elements to the detection cambered surface are equal, the magneto-sensitive elements comprise detection magneto-sensitive elements and calibration magneto-sensitive elements, the detection magneto-sensitive elements and the calibration magneto-sensitive elements are arranged in pairs relative to the central axis of the detection cambered surface, and the magneto-sensitive elements are connected with a cable. The magnetic memory sensor for detecting corrosion of the inner wall of the furnace tube can be conveniently inserted between narrow furnace tube walls for detection, and is simple in structure, convenient to operate and good in use effect.

Description

Technical Field

[0001] This application relates to the field of non-destructive testing technology. Specifically, it relates to a magnetic memory sensor for detecting corrosion on the inner wall of furnace tubes and its auxiliary device. Background Art

[0002] Among the current non-destructive testing technologies applicable to the detection of corrosion on the inner wall of dense furnace tubes with narrow gaps, the main non-destructive testing technologies include radiographic testing, ultrasonic phased array testing, remote field eddy current testing, array eddy current testing, and metal magnetic memory testing, etc. However, due to the relatively dense distribution of furnace tubes, it is difficult for the inspectors to reach the working position, and the gap between the furnace tubes is small. When the furnace tubes are in the natural state, it is difficult to place the testing equipment for detection. It is difficult to achieve effective detection with the above-mentioned several testing methods.

[0003] The current metal magnetic memory testing is suitable for the magnetic flux leakage testing caused by stress concentration in ferromagnetic metal components, such as positions where structural mutations occur, connection positions of two different-shaped components, defect positions, etc., which may cause stress concentration. In theory, after the inner wall of a thin-walled small-diameter tube is corroded, structural defects are generated, and under the action of high-temperature and high-pressure working conditions inside a power station boiler, stress concentration is generated, and a magnetic flux leakage phenomenon will also be formed. In terms of the detection of corrosion on the inner and outer walls of pipelines using magnetic memory, some scholars have verified it on the water-cooled wall of a power station boiler (detecting from the outside), and some scholars have also verified it in the detection of corrosion on the inner wall of buried large-diameter pipelines (detecting from inside the pipe). However, the detection direction of the current magnetic memory sensor is forward. Although the size of the sensor in a certain direction is small, it still cannot be placed between the narrow furnace tubes, and at the same time, it is impossible to quickly detect the furnace tubes.

[0004] In view of this, it is necessary to design a new type of magnetic memory sensor for detecting corrosion on the inner wall of furnace tubes that can overcome the above technical problems and effectively solve or alleviate the above technical problems. Summary of the Utility Model

[0005] One of the basic technical problems to be solved by this application is to provide a magnetic memory sensor for detecting corrosion on the inner wall of furnace tubes, which can be applicable to the detection of furnace tube components with narrow gaps.

[0006] Another basic technical problem to be solved by this application is to provide an auxiliary device for a magnetic memory sensor for detecting corrosion on the inner wall of furnace tubes, which can improve the detection quality of furnace tubes while accelerating the detection speed of furnace tubes.

[0007] To achieve the above object, on the one hand, the present application provides a magnetic memory sensor for detecting corrosion on the inner wall of a furnace tube, including a sensor body. The sensor body is an arc-shaped sensor, and the arc concave surface of the arc-shaped sensor is a detection arc surface; a connecting handle is arranged on the sensor body, a cable hole is arranged through the connecting handle, and a cable is arranged in the cable hole; a plurality of magnetic sensitive elements are arranged in the sensor body, and the distances from the sensing surfaces of the magnetic sensitive elements to the detection arc surface are all equal. The magnetic sensitive elements include a detection magnetic sensitive element and a calibration magnetic sensitive element, and the detection magnetic sensitive element and the calibration magnetic sensitive element are arranged in pairs with respect to the central axis of the detection arc surface, and each magnetic sensitive element is connected to the cable.

[0008] Preferably, the sensing surface of the magnetic sensitive element faces the detection arc surface.

[0009] Preferably, the sensor body further includes a housing end face, a housing side face, and a housing back face. The housing end face is arranged at both ends of the sensor body, the housing side face is arranged between the housing end faces, the housing back face is arranged between the housing side faces, and the housing back face is opposite to the detection arc surface. A sliding wheel group is arranged on the housing side face. The sliding wheel group includes sliding wheel mounting brackets symmetrically arranged on the housing side face along the central axis of the sensor body and sliding wheels connected to the sliding wheel mounting brackets, and each sliding wheel group is symmetrically arranged.

[0010] Preferably, an installation part is arranged at one end of the connecting handle away from the sensor body.

[0011] On the other hand, the present application provides an auxiliary device for a magnetic memory sensor for detecting corrosion on the inner wall of a furnace tube, including an auxiliary device body and the magnetic memory sensor for detecting corrosion on the inner wall of a furnace tube according to any one of the above technical solutions. A driving device and a plurality of installation holes are arranged on the auxiliary device body along the central axis of the auxiliary device body. A sensor installation card is arranged in the installation hole, and the sensor installation card is connected to the installation part of the connecting handle. Driving devices are arranged at both the upper and lower ends of the auxiliary device body. The driving device at the upper end is arranged above the sensor installation card at the uppermost end, and the driving device at the lower end is arranged between the two sensor installation cards at the lowermost end.

[0012] Preferably, the sensor installation card includes an installation card body, a spring connecting piece, a wire connecting piece, and a rotating pin shaft arranged on the upper end face of the installation card body. The rotating pin shaft is located between the spring connecting piece and the wire connecting piece, and the installation card body is rotatably arranged in the installation hole through the rotating pin shaft.

[0013] Preferably, a handheld operating device is further provided at the upper end of the auxiliary device body. The handheld operating device includes a handle, an operating rod rotatably connected to the handle through a fixing pin, a steel wire connected to the operating rod, and a plurality of small pulleys arranged at equal intervals along the same straight line on the auxiliary device body. The small pulleys are connected to the steel wire connector through the steel wire, and the small pulleys are connected to the spring connector through a return spring.

[0014] Preferably, the driving device includes a driving motor provided on the auxiliary device body and a driving wheel connected to the driving motor. The driving wheel drives the auxiliary device body to move.

[0015] Preferably, a support wheel is provided between the sensor mounting card and the adjacent driving device, and the support wheel is provided on the auxiliary device body.

[0016] Preferably, a support wheel is provided between the sensor mounting card and the adjacent driving device, and the support wheel is provided on the auxiliary device body.

[0017] It can be seen from the above technical solutions that the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube of the present application includes a sensor body. The sensor body is an arc-shaped sensor, and the arc concave surface of the arc-shaped sensor is a detection arc surface; a connection handle is provided on the sensor body, a cable hole is provided through the connection handle, and a cable is provided in the cable hole; a plurality of magnetic sensitive elements are provided in the sensor body, and the distance from the sensing surface of each magnetic sensitive element to the detection arc surface is equal. The magnetic sensitive elements include a detection magnetic sensitive element and a calibration magnetic sensitive element. The detection magnetic sensitive element and the calibration magnetic sensitive element are arranged in pairs with respect to the central axis of the detection arc surface, and each magnetic sensitive element is connected to the cable. The sensor in the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube of the present application is an arc-shaped sensor, and the arc-shaped sensor is convenient for inserting into narrow furnace tube gaps for detection.

[0018] In addition, the auxiliary device for the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube of the present application includes an auxiliary device body and the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube according to any of the above technical solutions. A driving device and a plurality of mounting holes are arranged on the auxiliary device body along the central axis of the auxiliary device body. A sensor mounting card is arranged in the mounting hole, and the sensor mounting card is connected to the mounting part of the connecting handle. Driving devices are arranged at both the upper and lower ends of the auxiliary device body. The driving device at the upper end is arranged above the sensor mounting card at the uppermost end, and the driving device at the lower end is arranged between the two sensor mounting cards at the lowermost end. The auxiliary device for the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube of the present application is provided with a driving device, which can realize the automatic movement of the auxiliary device body, facilitating the use by the operator. At the same time, a plurality of sensor mounting cards are arranged on the auxiliary device body, and multiple magnetic memory sensors for detecting corrosion on the inner wall of the furnace tube can be installed simultaneously to detect multiple furnace tubes at the same time, improving the detection efficiency.

[0019] Other advantages of the present application and the technical effects of the preferred implementation manners will be further described in the specific implementation manners below. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a specific embodiment of the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube of the present application;

[0021] Figure 2 is Figure 1 the left view of

[0022] Figure 3 is a schematic structural diagram of a specific embodiment of the auxiliary device for the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube of the present application;

[0023] Figure 4 is Figure 3 the right view of

[0024] Figure 5 is a schematic structural diagram of a specific embodiment of the driving device of the present application;

[0025] Figure 6 is a schematic structural diagram of a specific embodiment of the sensor mounting card of the present application;

[0026] Figure 7 is a schematic structural diagram of a specific embodiment of the sensor mounting card of the present application.

[0027] Description of the Reference Numerals

[0028] 1 Sensor body 11 Detection arc surface

[0029] 12 End face of the housing 13 Side face of the housing

[0030] 14 Back of the housing 2 Connecting handle

[0031] 21 Cable hole 22 Mounting part

[0032] 3 Magnetosensitive element 4 Sliding wheel group

[0033] 41 Sliding wheel mounting bracket 42 Sliding wheel

[0034] 5 Auxiliary device body 51 Mounting hole

[0035] 6 Sensor mounting card 61 Mounting card body

[0036] 62 Spring connecting piece 63 Steel wire connecting piece

[0037] 64 Rotating pin shaft 7 Driving device

[0038] 71 Driving motor 72 Driving wheel

[0039] 8 Handheld operating device 81 Handle

[0040] 82 Operating rod 83 Steel wire

[0041] 84 Small pulley 85 Return spring

[0042] 9 Speed measuring encoder 10 Support wheel Specific embodiments

[0043] The following will describe in detail the specific embodiments of the present application with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present application, and are not intended to limit the present application.

[0044] In the present application, unless otherwise specified, the orientation terms such as "upper, lower" generally refer to the upper orientation near the handheld operating device 8 on the auxiliary device body 5, and the lower orientation far from the handheld operating device 8 from the auxiliary device body 5.

[0045] As Figure 1 and Figure 2 shown, a basic embodiment of the present application provides a magnetic memory sensor for detecting corrosion on the inner wall of a furnace tube, including a sensor body 1. The sensor body 1 is an arc-shaped sensor, and the arc concave surface of the arc-shaped sensor is a detection arc surface 11; a connecting handle 2 is provided on the sensor body 1, a cable hole 21 is provided through the connecting handle 2, and a cable is provided in the cable hole 21; a plurality of magnetosensitive elements 3 are provided in the sensor body 1, the distances from the sensing surfaces of the magnetosensitive elements 3 to the detection arc surface 11 are all equal, the magnetosensitive elements 3 include detection magnetosensitive elements and calibration magnetosensitive elements, the detection magnetosensitive elements and the calibration magnetosensitive elements are arranged in pairs with respect to the central axis of the detection arc surface 11, and each magnetosensitive element 3 is connected to the cable.

[0046] As Figure 1 shown, the magnetic memory sensor for detecting the corrosion of the inner wall of the furnace tube of the present application includes a sensor body 1. The sensor body 1 is a circular arc-shaped sensor. The four corners of the circular arc-shaped sensor can be chamfered so that the height of the sensor body 1 in the up and down directions is smaller, which is convenient for inserting between narrow furnace tube walls for detection. Among them, the arc concave surface of the circular arc-shaped sensor is a detection arc surface 11. The circular arc-shaped detection arc surface 11 can better fit the outer peripheral surface of the furnace tube to be measured, making it convenient for the operator to move and measure the sensor body 1. A connection handle 2 is also provided on the sensor body 1. A cable hole 21 is provided through the connection handle 2. A cable is arranged in the cable hole 21. A plurality of magnetic sensitive elements 3 are arranged in the sensor body 1. The distance from the sensing surface of each magnetic sensitive element 3 to the detection arc surface 11 is set to be equal, making the data of the magnetic sensitive elements 3 more accurate when detecting the furnace tube. Among them, the magnetic sensitive elements 3 include detection magnetic sensitive elements and calibration magnetic sensitive elements. The detection magnetic sensitive elements and the calibration magnetic sensitive elements are arranged in pairs in the sensor body 1 with respect to the central axis of the detection arc surface 11. After passing through the cable hole 21, the cable is connected to the magnetic sensitive elements 3 to supply power to the magnetic sensitive elements 3.

[0047] Preferably, the sensing surface of the magnetic sensitive element 3 is arranged facing the detection arc surface 11, so that the magnetic sensitive element 3 can detect the inner wall of the furnace tube at a close distance, improving the accuracy of detection.

[0048] Preferably, as Figure 1 and Figure 2 shown, the sensor body 1 further includes a housing end face 12, a housing side face 13, and a housing back face 14. Among them, the housing end face 12 is arranged at both ends of the sensor body 1. The housing side face 13 is arranged between the housing end faces 12. The housing back face 14 is arranged between the housing side faces 13, and the housing back face 14 is opposite to the detection arc surface 11. The housing end face 12, the housing side face 13, and the housing back face 14 and the detection arc surface 11 form a closed sensor body 1. A sliding wheel group 4 is arranged on the housing side face 13. The sliding wheel group 4 includes sliding wheel mounting brackets 41 symmetrically arranged on the housing side face 13 along the central line of the sensor body 1 and sliding wheels 42 connected to the sliding wheel mounting brackets 41. Each sliding wheel group 4 is symmetrically arranged. The sliding wheel group 4 can keep the distance between the detection arc surface and the outer surface of the furnace tube to be measured constant, facilitating the sensor body 1 to slide on the outer surface of the furnace tube and preventing the sensor body 1 from being worn.

[0049] Preferably, an installation part 22 is arranged at one end of the connection handle 2 far from the sensor body 1. The installation part 22 is connected to the auxiliary device body 5, which can measure multiple furnace tubes simultaneously and improve the detection efficiency.

[0050] Based on the above-mentioned magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube in this application, the present application further provides an auxiliary device for the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube, including an auxiliary device body 5 and the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube according to any one of the above technical solutions. A driving device 7 and a plurality of mounting holes 51 are arranged on the auxiliary device body 5 along the central axis of the auxiliary device body 5. A sensor mounting card 6 is arranged in the mounting hole 51. The sensor mounting card 6 is connected to the mounting portion 22 of the connecting handle 2. Driving devices 7 are arranged at both the upper and lower ends of the auxiliary device body 5. The driving device 7 located at the upper end is arranged above the sensor mounting card 6 located at the uppermost end, and the driving device 7 located at the lower end is arranged between the two sensor mounting cards 6 located at the lowermost end.

[0051] To facilitate the understanding of the technical solution of the auxiliary device of the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube in this application, the following will be combined with the attached Figure 3 to Figure 7 to specifically illustrate the technical effects of the auxiliary device of the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube in this application.

[0052] As Figure 3 shown, the auxiliary device of the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube in this application includes an auxiliary device body 5 and the magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube according to any one of the above technical solutions. Among them, a driving device 7 and a plurality of mounting holes 51 are arranged on the auxiliary device body 5 along the central axis of the auxiliary device body 5. A sensor mounting card 6 is arranged in the mounting hole 51. The sensor mounting card 6 is connected to the mounting portion 22 of the connecting handle 2, so that a plurality of magnetic memory sensors for detecting corrosion on the inner wall of the furnace tube are installed on the auxiliary device body 5, and multiple furnace tubes can be detected simultaneously, improving the detection efficiency. The driving devices 7 are installed at both the upper and lower ends of the auxiliary device body 5. The driving device 7 located at the upper end is arranged above the sensor mounting card 6 located at the uppermost end, and the driving device 7 located at the lower end is arranged between the two sensor mounting cards 6 located at the lowermost end. The driving device 7 drives the auxiliary device body 5 to automatically move between the furnace tubes, facilitating the use of the operator.

[0053] Preferably, as Figures 4 to 7 shown, the sensor mounting card 6 includes a mounting card body 61, a spring connecting piece 62, a wire connecting piece 63 and a rotating pin shaft 64 arranged on the upper end surface of the mounting card body 61. The rotating pin shaft 64 is located between the spring connecting piece 62 and the wire connecting piece 63. The mounting card body 61 is rotatably arranged in the mounting hole 51 through the rotating pin shaft 64, which can enable the mounting card body 61 to move up and down in the mounting hole 51 while leaving enough reset space, so that the mounting card body 61 can adapt to furnace tubes and furnace tube gaps of different sizes, facilitating the measurement and use of the operator.

[0054] Preferably, a hand-held operating device 8 is further provided at the upper end of the auxiliary device body 5. The hand-held operating device 8 includes a handle 81, an operating rod 82 rotatably connected to the handle 81 through a fixing pin, a steel wire 83 connected to the operating rod 82, and a plurality of small pulleys 84 arranged at equal intervals on the auxiliary device body 5 along the same straight line. The small pulleys 84 are connected to the steel wire connector 63 through the steel wire 83, which can reduce the knotting of the steel wire and at the same time reduce the wear of the steel wire. The small pulleys 84 are connected to the spring connector 62 through a return spring 85. By rotating the operating rod 82, the steel wire 83 is driven to pull or loosen the mounting card body 61 connected to the steel wire connector 63, thereby adjusting the angle of the mounting card body 61 in the mounting hole 61, and then adjusting the furnace tube inner wall corrosion detection magnetic memory sensor connected to the mounting card body 61 to adapt to more types of furnace tube detections. The return spring 85 facilitates the reset of the mounting card body 61 in the mounting hole 51.

[0055] Preferably, the driving device 7 includes a driving motor 71 provided on the auxiliary device body 5 and a driving wheel 72 connected to the driving motor 71. The shape of the driving wheel 72 is waist-drum-shaped, and the arc radius of its cylindrical arc surface is slightly larger than the radius of the furnace tube. On the one hand, the rotation of the driving wheel 72 drives the auxiliary device body 5 to automatically move between the furnace tube gaps, which is convenient for the operator to use. On the other hand, it can keep the auxiliary device body 5 from slipping when moving on the furnace tube, improving stability.

[0056] Preferably, a support wheel 10 is provided between the sensor mounting card 6 and the adjacent driving device 7, and the support wheel 10 is provided on the auxiliary device body 5. At the same time, the arc radius of the cylindrical arc surface of the support wheel 10 is slightly larger than the radius of the tube, improving the smoothness and stability of the auxiliary device body 5 when moving between the furnace tubes and improving the detection quality.

[0057] Preferably, a camera is further provided between two adjacent mounting holes 51, which can be used to monitor the corrosion and mechanical damage conditions of the outer wall of the furnace tube. A speed measuring encoder 9 is provided on one side of the driving device 7. The speed measuring encoder 9 can detect the current moving speed of the auxiliary device body 5, and then control the driving motor 71 to adjust the driving wheel 72 to rotate at a specified speed, which is convenient for the operator to use.

[0058] To facilitate a more profound understanding of the technical concept and advantages of the furnace tube inner wall corrosion detection magnetic memory sensor and its auxiliary device of the present application, the following combines Figures 1 to 7 Describe the structural forms of the furnace tube inner wall corrosion detection magnetic memory sensor and the auxiliary device with relatively comprehensive relative preferred features of the present application.

[0059] The sensor body 1 is an arc-shaped sensor. The four corners of the arc-shaped sensor can be chamfered to facilitate the insertion of the sensor body 1 between narrow furnace tube walls for detection. Among them, the arc concave surface of the arc-shaped sensor is the detection arc surface 11. A connecting handle 2 is provided on the sensor body 1. An installation part 22 is provided at one end of the connecting handle 2 far from the sensor body 1. The installation part 22 is connected to the auxiliary device body 5. A cable hole 21 is provided through the connecting handle 2, and a cable is arranged in the cable hole 21. A plurality of magnetic sensitive elements 3 are arranged in the sensor body 1, so that the distances from the sensing surfaces of the magnetic sensitive elements 3 to the detection arc surface 11 are equal. The sensing surfaces of the magnetic sensitive elements 3 are arranged facing the detection arc surface 11. Among them, the magnetic sensitive elements 3 include detection magnetic sensitive elements and calibration magnetic sensitive elements. The detection magnetic sensitive elements and the calibration magnetic sensitive elements are arranged in pairs in the sensor body 1 with respect to the central axis of the detection arc surface 11. The cable is connected to the magnetic sensitive elements 3 to supply power to each magnetic sensitive element 3. The sensor body 1 further includes a shell end face 12, a shell side face 13, and a shell back face 14. Among them, the shell end face 12 is arranged at both ends of the sensor body 1, the shell side face 13 is arranged between the shell end faces 12, the shell back face 14 is arranged between the shell side faces 13, and the shell back face 14 is opposite to the detection arc surface 11. The shell end face 12, the shell side face 13, and the shell back face 14 and the detection arc surface 11 form a closed arc-shaped sensor body 1. A sliding wheel group 4 is provided on the shell side face 13. The sliding wheel group 4 includes sliding wheel mounting brackets 41 symmetrically arranged on the shell side face 13 along the center line of the sensor body 1 and sliding wheels 42 connected to the sliding wheel mounting brackets 41. Each sliding wheel group 4 is symmetrically arranged. The sliding wheel group 4 can keep the distance between the detection arc surface and the outer surface of the furnace tube to be measured constant. An installation part 22 is provided at one end of the connecting handle 2 far from the sensor body 1. The installation part 22 is connected to the auxiliary device body 5. A driving device 7 and a plurality of installation holes 51 are arranged on the auxiliary device body 5 along the central axis of the auxiliary device body 5. A sensor installation clamp 6 is arranged in the installation hole 51. The sensor installation clamp 6 is connected to the installation part 22 of the connecting handle 2, so that a plurality of magnetic memory sensors for detecting the corrosion of the inner wall of the furnace tube are installed on the auxiliary device body 5. The driving device 7 is installed at the upper and lower ends of the auxiliary device body 5. Among them, the driving device 7 at the upper end is arranged above the sensor installation clamp 6 at the uppermost end, and the driving device 7 at the lower end is arranged between the two sensor installation clamps 6 at the lowermost end. The auxiliary device body 5 is automatically moved between the furnace tubes by driving the driving device 7. The sensor installation clamp 6 includes an installation clamp body 61 and a spring connecting piece 62, a wire connecting piece 63, and a rotating pin shaft 64 arranged on the upper end face of the installation clamp body 61. The rotating pin shaft 64 is located between the spring connecting piece 62 and the wire connecting piece 63. The installation clamp body 61 is rotatably arranged in the installation hole 51 through the rotating pin shaft 64, which can enable the installation clamp body 61 to move up and down in the installation hole 51 while leaving enough reset space.To enable the installation card body 61 to adapt to furnace tubes and furnace tube gaps of different sizes, a handheld operating device 8 is further provided at the upper end of the auxiliary device body 5. Among them, the handheld operating device 8 includes a handle 81, an operating rod 82 rotatably connected to the handle 81 through a fixing pin, a steel wire 83 connected to the operating rod 82, and a plurality of small pulleys 84 arranged at equal intervals along the same straight line on the auxiliary device body 5. The small pulleys 84 are connected to the steel wire connector 63 through the steel wire 83, and the small pulleys 84 are connected to the spring connector 62 through a return spring 85. By rotating the operating rod 82 to drive the steel wire 83 to pull or loosen the installation card body 61 connected to the steel wire connector 63, the angle of the installation card body 61 in the installation hole 61 is adjusted accordingly. The return spring 85 facilitates the reset of the installation card body 61 in the installation hole 51. The driving device 7 includes a driving motor 71 provided on the auxiliary device body 5 and a driving wheel 72 connected to the driving motor 71. The shape of the driving wheel 72 is waist-shaped, and the arc radius of the cylindrical arc surface of the driving wheel 72 is slightly larger than the radius of the furnace tube. On the one hand, the rotation of the driving wheel 72 drives the auxiliary device body 5 to automatically move between the furnace tube gaps. A support wheel 10 is provided between the sensor installation card 6 and the adjacent driving device 7, and the support wheel 10 is provided on the auxiliary device body 5. At the same time, the arc radius of the cylindrical arc surface of the support wheel 10 is slightly larger than the radius of the tube. A camera is also provided between two adjacent installation holes 51. A speed measuring encoder 9 is provided on one side of the driving device 7. The speed measuring encoder 9 can detect the current moving speed of the auxiliary device body 5, and then control the driving motor 71 to adjust the rotation of the driving wheel 72 to reach the specified speed.,

[0060] As can be seen from the above description of the present application, the sensor body 1 is an arc-shaped sensor, which is convenient for the sensor body 1 to be inserted between the narrow furnace tube walls for detection;

[0061] At the same time, a driving device 7 and a plurality of installation holes 51 are provided along the central axis of the auxiliary device body 5 on the auxiliary device body 5. A sensor installation card 6 is arranged in the installation hole 51. The sensor installation card 6 is connected to the installation part 22 of the connecting handle 2, so that a plurality of furnace tube inner wall corrosion detection magnetic memory sensors are installed on the auxiliary device body 5, thereby detecting multiple furnace tubes at the same time and improving the detection efficiency.

[0062] In addition, the installation card body 61 can move up and down in the installation hole 51, and at the same time, the installation hole 51 has enough reset space, enabling the installation card body 61 to adapt to furnace tubes and furnace tube gaps of different sizes, which is convenient for the operator to detect and use.

[0063] The preferred embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited thereto. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, including the combination of each specific technical feature in any suitable manner. To avoid unnecessary repetition, the present application will not separately describe various possible combination methods. However, these simple modifications and combinations should also be regarded as the content claimed in the present application and all fall within the protection scope of the present application.

Claims

1. A magnetic memory sensor for detecting corrosion on the inner wall of a furnace tube, characterized in that It includes a sensor body (1), and the sensor body (1) is an arc-shaped sensor, and the arc concave surface of the arc-shaped sensor is a detection arc surface (11); A connecting handle (2) is arranged on the sensor body (1), a cable hole (21) is arranged through the connecting handle (2), and a cable is arranged in the cable hole (21); A plurality of magnetic sensitive elements (3) are arranged in the sensor body (1), the distances from the sensing surfaces of the magnetic sensitive elements (3) to the detection arc surface (11) are all equal, the magnetic sensitive elements (3) include detection magnetic sensitive elements and calibration magnetic sensitive elements, the detection magnetic sensitive elements and the calibration magnetic sensitive elements are arranged in pairs with respect to the central axis of the detection arc surface (11), and each magnetic sensitive element (3) is connected to the cable.

2. The magnetic memory sensor for detecting corrosion on the inner wall of a furnace tube according to claim 1, wherein The sensing surface of the magnetic sensitive element (3) faces the detection arc surface (11).

3. The magnetic memory sensor for detecting corrosion on the inner wall of a furnace tube according to claim 1, wherein The sensor body (1) further includes a housing end face (12), a housing side face (13) and a housing back face (14), the housing end face (12) is arranged at both ends of the sensor body (1), the housing side face (13) is arranged between the housing end faces (12), the housing back face (14) is arranged between the housing side faces (13), and the housing back face (14) is opposite to the detection arc surface (11), a sliding wheel group (4) is arranged on the housing side face (13), the sliding wheel group (4) includes sliding wheel mounting brackets (41) symmetrically arranged on the housing side face (13) along the central line of the sensor body (1) and sliding wheels (42) connected to the sliding wheel mounting brackets (41), and each sliding wheel group (4) is symmetrically arranged.

4. The magnetic memory sensor for detecting corrosion on the inner wall of the furnace tube according to claim 1, wherein An installation part (22) is arranged at one end of the connecting handle (2) far away from the sensor body (1).

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