A combined scanning device of AC electromagnetic field probe and eddy current array probe

Abstract

The present invention relates to the technical field of non-destructive testing probe clamping, and specifically to a combined scanning device for an AC electromagnetic field probe and an eddy current array probe. The device comprises a probe switching unit and a linear feed unit, and the probe switching unit and the linear feed unit are fixedly connected by a connecting rod. The probe clamping unit is used to clamp the AC magnetic field probe and the eddy current array probe, and the stepper motor steering unit is used to realize the steering of the probe clamping unit and the switching of the two probes. The linear feed unit is provided with parallel optical bars and lead screws, and the probe switching unit is provided with through holes and lead screw nuts adapted thereto. The lead screw is driven to rotate by a stepper motor to realize linear feeding. The entire device is provided with a mounting hole for installation on an underwater robot, and the device is easy to operate. The device is efficient and reliable, and can realize automation through combined scanning, providing technical support for the safe detection of the surface condition of the spent fuel pool.

Description

Technical Field

[0001] The invention relates to the technical field of nondestructive testing probe clamping, and in particular to a combined scanning device of an alternating current electromagnetic field probe and an eddy current array probe. Background Art

[0002] With the continuous development of the national economy and industry, the strategic and important role of emerging energy sources are increasing day by day. As a new energy source, nuclear energy has great development potential due to its advantages of high energy density, low pollution and abundant reserves. The spent fuel storage device - the spent fuel pool plays a vital role in the safe use of nuclear energy. Ensuring the safety of the spent fuel pool is to safeguard the safe use of nuclear energy.

[0003] Alternating Current Field Measurement (ACFM) technology is an emerging electromagnetic nondestructive testing technology, mainly used for surface crack detection of conductive materials. It has the advantages of non-contact measurement and quantitative evaluation, and can be used for surface detection of spent fuel pools.

[0004] Eddy Current Testing technology is a traditional electromagnetic non-destructive testing technology. It is based on the principle of electromagnetic induction and generates high-frequency eddy currents on the surface of a conductor for testing. It has the advantages of non-contact measurement, easy automated testing of tubes and rods, and simple operation. It can also be used for spent fuel pool surface testing.

[0005] The safety of spent fuel pools is extremely important, and multiple methods need to be used to simultaneously detect their surfaces to ensure safety and reliability. In view of the above two electromagnetic nondestructive testing methods, it is necessary to propose a simple, efficient and reliable joint scanning device to simultaneously clamp the AC electromagnetic field probe and the eddy current array probe to achieve automated scanning and provide technical support for the safe detection of the surface condition of the spent fuel pool. Summary of the invention

[0006] 1. Purpose:

[0007] In view of the above problems, the present invention provides a combined scanning device of an AC electromagnetic field probe and an eddy current array probe, which can clamp the two probes at the same time, realize probe switching by controlling a stepper motor, and realize linear scanning of the surface of the spent fuel pool by driving a lead screw with a DC motor, thereby effectively improving the detection efficiency.

[0008] 2. Technical solution:

[0009] The present invention provides a combined scanning device of an AC electromagnetic field probe and an eddy current array probe, comprising a probe switching unit and a linear feed unit. The probe switching unit comprises a probe clamping unit and a stepper motor steering unit. The probe clamping unit is provided with mounting grooves for the AC electromagnetic field probe and the eddy current array probe for placing the two probes.

[0010] A combined scanning device of an AC electromagnetic field probe and an eddy current array probe comprises a probe switching unit and a linear feed unit. The probe switching unit comprises a probe clamping unit and a stepper motor steering unit. The probe clamping unit comprises a skeleton body, and an AC electromagnetic field probe mounting slot and an eddy current array probe mounting slot located on the skeleton body. The probe switching unit and the linear feed unit are fixedly connected by a connecting rod.

[0011] The AC electromagnetic field probe installation slot and the eddy current array probe installation slot are arranged at 90 degrees, and their core sensing parts are located on the circumference of the same radius.

[0012] The probe switching unit is cylindrical; the stepper motor steering unit includes two parts, both of which are cylindrical, and the diameter of the upper cylinder is larger than the diameter of the lower cylinder; the lower cylinder of the stepper motor steering unit and the center of the probe switching unit are fixedly connected.

[0013] The linear feed unit comprises a lead screw and a polished rod parallel to each other, a support and a stepper motor; one end of the support is provided with two through holes, and both ends of the lead screw and the polished rod respectively pass through the through holes of the support; one end of the lead screw and the polished rod passes through the through holes of the support and is connected to the stepper motor.

[0014] One end of the connecting rod has a through hole from top to bottom, and the lower cylinder of the stepping motor steering unit passes through the through hole of the connecting rod from top to bottom; the other end of the connecting rod has a through hole from left to right, and the lead screw and the smooth rod pass through the through hole of the connecting rod from left to right.

[0015] The support piece is L-shaped, and a fixing hole is opened at the other end.

[0016] The stepping motor steering unit sends out a pulse signal to control the rotating probe clamping unit to switch between the two probes.

[0017] The lower cylinder of the stepping motor steering unit passes through a through hole opened from top to bottom at one end of the connecting rod, and the diameters of the lower cylinder of the stepping motor steering unit and the through hole of the connecting rod from top to bottom are the same.

[0018] The stepper motor sends out a pulse signal to control the movement of the lead screw.

[0019] A lead screw nut is fixedly mounted on the probe switching unit, and the lead screw nut cooperates with the lead screw to complete the transmission motion.

[0020] 3. Effect:

[0021] The present invention provides a combined scanning device of an AC electromagnetic field probe and an eddy current array probe, which can clamp the two probes at the same time, realize probe switching by controlling a stepper motor, and realize linear scanning of the surface of a spent fuel pool by driving a lead screw with a DC motor. The device is easy to operate, efficient and reliable, and has automatic scanning, providing technical support for the safe detection of the surface condition of a spent fuel pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the combined scanning device of AC electromagnetic field probe and eddy current array probe

[0023] Figure 2 Schematic diagram of the probe clamping unit structure

[0024] Figure 3 Schematic diagram of linear feed unit structure

[0025] Figure 4 Schematic diagram of longitudinal weld scanning

[0026] Figure 5 Schematic diagram of horizontal weld scanning

[0027] In the figure: 1. probe switching unit, 2. linear feed unit, 10. probe clamping unit, 20. stepper motor steering unit, 21. connecting rod, 30. lead screw, 40. optical rod, 50. lead screw nut, 60. through hole, 70. stepper motor, 80. fixing hole, 90. support member, 101. skeleton body, 201. second connecting part, 1023. inner surface of side wall, 1024. outer surface of side wall, 102. AC electromagnetic field probe mounting slot, 103. eddy current array probe mounting slot. DETAILED DESCRIPTION

[0028] The present invention provides a combined scanning device of an AC electromagnetic field probe and an eddy current array probe, comprising an array probe switching unit and a linear feed unit. The probe switching unit 1 comprises a probe clamping unit 10 and a stepper motor steering unit 20. The probe clamping unit 10 is used to clamp an AC magnetic field probe 102 and an eddy current array probe 103. The stepper motor steering unit 20 is used to realize the steering of the probe clamping unit 10 to realize the switching of the two probes. The linear feed unit is provided with a parallel optical bar 40 and a lead screw 30. The probe switching unit 1 is provided with a through hole and a lead screw nut 50 adapted thereto. The lead screw 30 is driven to rotate by a stepper motor 70 to realize linear feeding. The entire device is provided with a mounting hole 80 for being mounted on an underwater robot to realize the detection function together.

[0029] Figure 1 It is a schematic diagram of the structure of an AC electromagnetic field probe and an eddy current array probe combined scanning device provided in an embodiment of the present invention. Figure 2It is a schematic diagram of the structure of a probe clamping unit provided in an embodiment of the present invention. Figure 3 It is a schematic diagram of the structure of a linear feed unit provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of longitudinal weld scanning. Figure 5 This is a schematic diagram of horizontal weld scanning. Figures 1 to 5 As shown, the combined scanning device of the AC electromagnetic field probe and the eddy current array probe of this embodiment includes a probe switching unit 1 and a linear feeding unit 2. The probe switching unit 1 includes a probe clamping unit 10 and a stepper motor steering unit 20.

[0030] like Figure 2 As shown, the probe clamping unit 10 includes a skeleton body 101, and an AC electromagnetic field probe mounting slot 102 and an eddy current array probe mounting slot 103 located on the skeleton body 101. The probe mounting slots 102 and 103 are arranged at 90 degrees, and their core sensing parts are located on the circumference of the same radius to ensure that the detection positions of the two probes are the same when they are linearly fed before and after turning 90 degrees.

[0031] like Figure 3 As shown, the linear feed unit 2 is provided with a lead screw 30 and an optical rod 40 which are parallel to each other. The probe switching unit 1 is provided with a lead screw nut 50, which is used to cooperate with the lead screw 30 of the linear feed unit 2 to transmit motion. The connecting rod 21 is provided with a through hole 60, which is used to cooperate with the optical rod 40 and is combined with the lead screw mechanism to realize motion transmission together.

[0032] like Figure 4 As shown, the stepper motor steering unit 20 can rotate the probe clamping unit 10 through pulse signal control to achieve two probe switching. One end of the lead screw 30 is connected to the stepper motor 70, and the pulse signal control is used to realize the conversion from rotation to linear motion, so as to realize linear feeding of the probe switching unit 1, and the longitudinal weld can be detected.

[0033] like Figure 5 As shown, the whole device is provided with fixing holes 80 for fixing on devices such as underwater robots, so as to complete transverse weld detection.

Claims

1. A combined scanning device of an AC electromagnetic field probe and an eddy current array probe, characterized in that: The probe switching unit (1) comprises a probe clamping unit (10) and a stepping motor steering unit (20); the probe clamping unit (10) comprises a skeleton body (101), and an alternating current electromagnetic field probe mounting slot (102) and an eddy current array probe mounting slot (103) located on the skeleton body (101); the probe switching unit (1) and the linear feed unit (2) are fixedly connected via a connecting rod (21); The AC electromagnetic field probe installation slot (102) and the eddy current array probe installation slot (103) are arranged at 90 degrees, and their core sensing parts are located on a circle with the same radius; The probe switching unit (1) is cylindrical; the stepping motor steering unit (20) comprises an upper and a lower part, both of which are cylindrical, and the diameter of the upper cylinder is larger than the diameter of the lower cylinder; the lower cylinder of the stepping motor steering unit (20) and the center of the probe switching unit (1) are fixedly connected; The linear feed unit (2) comprises a lead screw (30) and a polished rod (40) which are parallel to each other, a support member (90) and a stepping motor (70); one end of the support member (90) is provided with two through holes, and both ends of the lead screw (30) and the polished rod (40) respectively pass through the through holes of the support member (90); one end of the lead screw (30) and the polished rod (40) passes through the through holes of the support member (90) and is connected to the stepping motor (70); A through hole is opened from top to bottom at one end of the connecting rod (21), and the lower cylinder of the stepping motor steering unit (20) passes through the through hole of the connecting rod (21) from top to bottom; a through hole is opened from left to right at the other end of the connecting rod (21), and the lead screw (30) and the smooth rod (40) pass through the through hole of the connecting rod (21) from left to right; The support member (90) is L-shaped, and a fixing hole (80) is formed at the other end; The stepping motor steering unit (20) sends out a pulse signal to control the rotating probe clamping unit (10) to switch between the two probes; The lower cylinder of the stepping motor steering unit (20) passes through a through hole opened from top to bottom at one end of the connecting rod (21), and the diameters of the through holes of the lower cylinder of the stepping motor steering unit (20) and the connecting rod (21) from top to bottom are the same.

2. The combined scanning device of an AC electromagnetic field probe and an eddy current array probe according to claim 1, characterized in that: The stepping motor (70) sends out a pulse signal to control the movement of the lead screw (30).

3. The combined scanning device of an AC electromagnetic field probe and an eddy current array probe according to claim 1, characterized in that: The probe switching unit (1) is fixedly mounted with a screw nut (50), and the screw nut (50) and the screw (30) cooperate to complete the transmission motion.

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