CN204302227U - A kind of array probe of ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting - Google Patents
A kind of array probe of ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting Download PDFInfo
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- CN204302227U CN204302227U CN201420867509.1U CN201420867509U CN204302227U CN 204302227 U CN204302227 U CN 204302227U CN 201420867509 U CN201420867509 U CN 201420867509U CN 204302227 U CN204302227 U CN 204302227U
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Abstract
The utility model belongs to the electromagnetic nondestructive of nuclear power station ferromagnetism thin pipe wall interior crossing type and the electromagnetic nondestructive testing field of other ferromagnetism thin pipe wall, is specifically related to the array probe of a kind of ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting.Comprise along two uniform row's giant magneto-resistance sensor and magnet exciting coils of tubing circumference; Often in row, giant magneto-resistance sensor and magnet exciting coil interval are arranged, the giant magneto-resistance sensor in two rows and magnet exciting coil interlaced arrangement.When carrying out the detection of pipeline, first two magnet exciting coils adjacent on first row coil are excited, realize exciting successively of other magnet exciting coil of this winding displacement circle again, after sequential has covered this single-row winding, excite two magnet exciting coils close with front row of second row coil, then realize the exciting successively of other magnet exciting coil of this winding displacement circle.The utility model can realize the detection of the axial flaw to pipe with small pipe diameter sample pipe.
Description
Technical field
The utility model belongs to the electromagnetic nondestructive of nuclear power station ferromagnetism thin pipe wall interior crossing type and the electromagnetic nondestructive testing field of other ferromagnetism thin pipe wall, is specifically related to the array probe of a kind of ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting.
Background technology
Nuclear power station ferromagnetic tubes electromechanical detection method present stage mainly adopts far-field eddy.Far-field eddy has certain sensitivity and resolving power for the detection of defect, but owing to adopting the magnetic saturation mode of permanent magnet, its intensity of magnetization can not regulate, the intensity of magnetization may be caused inadequate, thus making the residual magnetic field of ferromagnetic tubes produce interference to detection signal, the mode of magnetization that far-field eddy adopts in addition is more adopt axial excitation, and namely permanent magnet N-S places along tubular axis pole, this kind of modes of emplacement is more responsive for detecting of circumferential defect, but is difficult to check axial flaw.
Magnetic Flux Leakage Inspecting technology is a kind of Automatic Measurement Technique detecting the stray field of ferromagnetic tubes of coming from magnetic derives from technology.The method, by ferromagnetic tubes magnetization, detects the leakage field caused by defect, thus reaches the judgement of the quantitative and qualitative analysis to defect.The detection mode for pipeline circumferential defect (axial magnetized) of stray field and far-field eddy are similar to; But the built-in modes of emplacement that the detection for axial flaw (circumferential magnetization) then adopts permanent magnet N-S pole vertical with tubular axis, and be that pivot carries out rotating thus makes whole pipeline carry out circumferential magnetization with tubular axis by permanent magnet, because the direction in now magnetic field is along tube wall direction, therefore more responsive for axial flaw.Can there is a lot of bend pipes in the pipeline of nuclear power station, machinery rotates the noise brought and the difficulty controlled, and makes the mode adopting machinery to rotate not be best.
Summary of the invention
The purpose of this utility model is the array probe providing a kind of ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting, to realize the detection of the axial flaw to pipe with small pipe diameter sample pipe.
For achieving the above object, technical solution adopted in the utility model is:
An array probe for ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting, comprises along two uniform row's giant magneto-resistance sensor and magnet exciting coils of tubing circumference; Often in row, giant magneto-resistance sensor and magnet exciting coil interval are arranged, the giant magneto-resistance sensor in two rows and magnet exciting coil interlaced arrangement.
Described magnet exciting coil is that axle is around formula coil.
When carrying out the detection of pipeline, first two magnet exciting coils adjacent on first row coil are excited, realize exciting successively of other magnet exciting coil of this winding displacement circle again, after sequential has covered this single-row winding, excite two magnet exciting coils close with front row of second row coil, then realize the exciting successively of other magnet exciting coil of this winding displacement circle.
Beneficial effect acquired by the utility model is:
The utility model realizes the circumferential magnetization of pipeline in the mode that the mode of rotary electronic replaces machinery to rotate, adopt giant reluctivity device as detecting sensor, realize probe axial flaw is detected, reduce the impact of probe machinery rotation on flaw detection sensitivity, enhance the antijamming capability of probe, due to employing is coil magnetizing, and based on the restriction of power, the probe of this kind of structure is applicable to the built-in detection of thin pipe wall pipe with small pipe diameter light-wall pipe.
(1) by adopting solenoid to excite magnetic field magnetisation ferromagnetic tubes, change the situation of original permanent magnet as source of magnetization, adopt the mode of this local magnetized, improve the magnetic field homogeneity in region, magnetic field intensity can be regulated additionally by electromagnet, therefore corresponding stray field intensity also can change, than permanent magnet advantages thereupon;
(2) adopt the circumferential magnetization mode of rotary electronic, decrease machinery and rotate the noise jamming and control difficulty brought, what rotate than machinery on magnetizing velocity wants fast simultaneously;
(3) for circumferential Energizing unit, coil on single-row and the staggered pattern of sensor ensure that detecting of the stray field of defect, and the staggered mode of two row then achieves the covering of magnetizing field and the detecting of whole circumferential tube wall axial flaw of whole circumferential tube wall;
(4) coil can generate heat in long testing process, and according to Coil Detector, the signal to noise ratio of detecting signal can be subject to severe jamming, and giant magneto-resistance sensor has the effect of good suppression temperature drift, can ensure the good signal-to noise ratio of defects detection.
Accompanying drawing explanation
Fig. 1 is the array probe structure chart I of the utility model ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting;
Fig. 2 is the array probe structure chart II of the utility model ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting;
Fig. 3 is the distribution characteristics schematic diagram of magnetic leakage detecting probe circumference exciting field;
Fig. 4 is A-A-first row coil magnetic field distribution characteristics schematic diagram;
Fig. 5 is B-B-second row coil magnetic field distribution characteristics schematic diagram;
In figure: 1, giant magneto-resistance sensor; 2, magnet exciting coil.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
As Figure 1-Figure 5, the array probe of ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting described in the utility model comprises along two uniform row's giant magneto-resistance sensor 1 and magnet exciting coils 2 of tubing circumference; Often in row, giant magneto-resistance sensor 1 and magnet exciting coil 2 interval are arranged, the giant magneto-resistance sensor 1 in two rows and magnet exciting coil 2 interlaced arrangement.Magnet exciting coil 2 is that axle is around formula coil.
When carrying out the detection of pipeline, first two magnet exciting coils 2 adjacent on first row coil are excited, realize exciting successively of other magnet exciting coil 2 of this winding displacement circle again, (excite clockwise or excite counterclockwise) after sequential has covered this single-row winding, excite two magnet exciting coils 2 (clockwise excite or counterclockwise excite) close with front row of second row coil, then realize the exciting successively of other magnet exciting coil 2 of this winding displacement circle.The sequential shooting parameter of circumferential magnetization can also be regulated in conjunction with sample rate, the position feedback of popping one's head in along axle movement velocity and encoder in testing process.
Claims (3)
1. an array probe for ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting, is characterized in that: comprise along two uniform row's giant magneto-resistance sensor (1) and magnet exciting coils (2) of tubing circumference; Often in row, giant magneto-resistance sensor (1) and magnet exciting coil (2) interval are arranged, the giant magneto-resistance sensor (1) in two rows and magnet exciting coil (2) interlaced arrangement.
2. the array probe of ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting according to claim 1, is characterized in that: described magnet exciting coil (2) is for axle is around formula coil.
3. the array probe of ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting according to claim 1, it is characterized in that: when carrying out the detection of pipeline, first two magnet exciting coils (2) adjacent on first row coil are excited, realize exciting successively of other magnet exciting coil (2) of this winding displacement circle again, after sequential has covered this single-row winding, excite two magnet exciting coils (2) close with front row of second row coil, then realize the exciting successively of other magnet exciting coil (2) of this winding displacement circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420867509.1U CN204302227U (en) | 2014-12-30 | 2014-12-30 | A kind of array probe of ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420867509.1U CN204302227U (en) | 2014-12-30 | 2014-12-30 | A kind of array probe of ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting |
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| CN204302227U true CN204302227U (en) | 2015-04-29 |
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| CN201420867509.1U Active CN204302227U (en) | 2014-12-30 | 2014-12-30 | A kind of array probe of ferromagnetism light-wall pipe circumference ac magnetization Magnetic Flux Leakage Inspecting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806929A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Ferromagnetic thin-walled tube circumferential AC magnetization magnetic flux leakage detection array probe |
| CN106770632A (en) * | 2015-11-24 | 2017-05-31 | 核动力运行研究所 | A kind of probe of the dc magnetization based on receiving type coil suitable for omega welding seam |
-
2014
- 2014-12-30 CN CN201420867509.1U patent/CN204302227U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806929A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Ferromagnetic thin-walled tube circumferential AC magnetization magnetic flux leakage detection array probe |
| CN106770632A (en) * | 2015-11-24 | 2017-05-31 | 核动力运行研究所 | A kind of probe of the dc magnetization based on receiving type coil suitable for omega welding seam |
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