CN106990164A - A kind of steel pipe longitudinal defect magnetic leakage crack detection device based on rotary magnetization - Google Patents
A kind of steel pipe longitudinal defect magnetic leakage crack detection device based on rotary magnetization Download PDFInfo
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- CN106990164A CN106990164A CN201710194579.3A CN201710194579A CN106990164A CN 106990164 A CN106990164 A CN 106990164A CN 201710194579 A CN201710194579 A CN 201710194579A CN 106990164 A CN106990164 A CN 106990164A
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
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Abstract
The invention discloses a kind of steel pipe longitudinal defect magnetic leakage crack detection device based on rotary magnetization.The device includes rotating magnetizer, field power supply, area array sensor array, area array sensor array bracket, wave filter, amplifier, A/D converter.Field power supply provides phase asynchronous alternating current to rotating magnetizer, and rotary magnetization is produced inside rotating magnetizer.The area array sensor array of annular is fixed on inside rotating magnetizer by support, all-round to covering steel pipe.When steel pipe is by failure detector, rotary magnetization field carries out all-round to uniform magnetization to it, if there is longitudinal defect in steel pipe, defect magnetic flux leakage field will be produced, and picked up by the sensor of defect correspondence position and be converted to electric signal, sequentially pass through wave filter, amplifier, A/D converter passes to computer, realizes the detection of longitudinal defect.The device is all-round to uniform magnetization to steel pipe progress, improves the detection efficiency of longitudinal defect, reduces cost.
Description
Technical field
The present invention relates to field of non destructive testing, and in particular to a kind of steel pipe longitudinal defect leakage field based on rotary magnetization is visited
Hinder device.
Background technology
Steel pipe is widely used in petrochemical industry and infrastructure as important transport and backing material.With industry
The fast development of modernization, the demand to high-quality steel pipe is increasing.At present, China has state-of-the-art steel pipe's production in the world
Technique and newest Tube Rolling Train, steel pipe's production rhythm are more and more faster.According to American Petroleum Institute（API）Requirement, Suo Yougang
Pipe must carry out 100% quality testing before dispatching from the factory.
Magnetic Flux Leakage Inspecting as a kind of efficient detection method, can effective detection steel pipe inside and outside defect, and to surface of test piece
It is required that it is low, without couplant, in the detection process for being widely used in various ferrimagnets, it is particularly suitable for use in elongated ferromagnetic
Property component high-speed quality detection, such as steel pipe, steel wire rope and rail.
Theoretical according to the perpendicular magnetization of Magnetic Flux Leakage Inspecting, magnetization field direction will try one's best and vertical with crack orientation can inspire
The stray field of sufficient intensity.Trend according to crackle relative to steel pipe, is divided into：Longitudinal defect（Namely axially）And transverse defect
（Namely it is circumferential）.Longitudinal defect is parallel to steel pipe axial direction, circumference of the transverse defect along steel pipe.Therefore, formd in Magnetic Flux Leakage Inspecting
Steel pipe axial magnetized detects that transverse defect and circumferential magnetization detect the basic test format and defect-detecting equipment structure of longitudinal defect.
When being detected to steel pipe longitudinal defect, traditional single direct current circumferential magnetization method can only be in the circumferential formation office of steel pipe
The detectable region in portion.Therefore, the automation all standing to realize steel pipe longitudinal defect is detected, typically by rotating circumferential magnetization
Device, steel pipe straight ahead, or the mode that fixed circumferential magnetization device, steel pipe are threadingly advanced are carried out.By bulky magnetizer or
Steel pipe is rotated the complexity for considerably increasing detection device, so as to add testing cost, and rotates can drop at a high speed
The stability and reliability of low detection.
In order to simplify steel pipe longitudinal defect detection method, CN200810197719.3 discloses a kind of steel pipe cross magnetization leakage
Magnetic detection device, it detects that all standing of the main frame to realize longitudinal defect is examined automatically by the longitudinal defect of two sets of quadrature arrangements
Survey.In addition, CN201510752847.X discloses a kind of steel pipe impulse magnetization magnetic leakage crack detection device, it is by being divided steel pipe
When local magnetized so that it is a set of that two sets of longitudinal defects are detected into main frames are reduced to.Above two method can realize magnetizer
Fixed, the detection mode of steel pipe straight ahead is that the local magnetic of subregion is carried out to steel pipe yet with above two Magnitizing method
Change, magnetize uneven in subregion intersection, so that circumferential sensitivity difference can be increased, reduction detection reliability.In addition, both
Mechanical structure is complicated with signal system, and the space accounted for is larger, and cost is high, and practicality is relatively low.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide a kind of steel pipe longitudinal defect leakage field based on rotary magnetization
Failure detector.The device is all-round to uniform magnetization to steel pipe progress using rotary magnetization, realizes tested steel pipe with straight at a high speed
When line is promoted, all standing that can just realize steel pipe longitudinal defect by a jacket stationary type detection unit is detected.
A kind of steel pipe longitudinal defect magnetic leakage crack detection device based on rotary magnetization that the present invention is provided, its structure includes：
Rotating magnetizer, area array sensor array, area array sensor array bracket, field power supply, wave filter, amplifier, A/D conversions
Device.Field power supply provides phase asynchronous alternating current to rotating magnetizer, and then produces rotary magnetic in rotating magnetizer inner space
Change field.It is all-round to uniform magnetization by rotary magnetization when steel pipe is by rotating magnetizer.If there is longitudinal defect in steel pipe,
Defect magnetic flux leakage field will be produced, and is picked up by the sensor of defect correspondence position and is converted to electric signal, wave filter is sequentially passed through, puts
Big device, A/D converter passes to computer, realizes the detection of longitudinal defect.
In the above-mentioned technical solutions, the rotary speed and big I of rotating excitation field pass through excitation electricity in the rotating magnetizer
The phase asynchronous ac frequency and amplitude that source is provided are controlled, and are required with adapting to different detections, such as different detection speeds, steel
Tubing matter and appearance and size etc..
In the above-mentioned technical solutions, the lift-off distance between the area array sensor array and steel tube surface is generally
1.0mm。
The steel pipe longitudinal defect magnetic leakage crack detection device based on rotary magnetization that the present invention is provided, it has following very prominent
The advantage gone out：
1. phase asynchronous alternating current is passed through rotating magnetizer, rotary magnetization is produced inside it, and then steel pipe is carried out all-round
To uniform magnetization, all standing detection of steel pipe longitudinal defect is realized.
2. the rotary speed and intensity of rotary magnetization can be adjusted as needed, to adapt to different detection requirements.
3. in detection process, magnetizer is fixed, steel pipe linear advancement, therefore simple in construction, facility compact, maintenance cost
It is low, it is extremely applicable to the high-speed lossless detection of steel pipe.Meanwhile, the elongated ferromagnetic component for solving itself to be difficult to rotate it is vertical
To defects detection (such as coiled tubing, kelly bar and rail).
Brief description of the drawings
Fig. 1 is the steel pipe longitudinal defect magnetic leakage crack detection device structural representation based on rotary magnetization
Fig. 2 is the typical phase asynchronous ac signal figure of field power supply input
When Fig. 3 a are that phase asynchronous alternating current was in for I stage, the distribution schematic diagram of magnetizing field is produced in rotating magnetizer
When Fig. 3 b are that phase asynchronous alternating current was in for II stage, the distribution schematic diagram of magnetizing field is produced in rotating magnetizer
When Fig. 3 c are that phase asynchronous alternating current was in for III stage, the distribution schematic diagram of magnetizing field is produced in rotating magnetizer
When Fig. 3 d are that phase asynchronous alternating current was in for IV stage, the distribution schematic diagram of magnetizing field is produced in rotating magnetizer
Fig. 4 is area array sensor array structure schematic diagram
Fig. 5 is the longitudinal defect detection principle diagram based on rotary magnetization
Each shown by reference numeral in above-mentioned accompanying drawing represents that object is respectively：1- rotating magnetizers；2- area array sensor arrays；3- steel
Pipe；4- quadrupole magnetizing coils；5- area array sensor array brackets；6- field power supplies；7- wave filters；8- amplifiers；9-A/D is changed
Device；10- rotary magnetizations；11,12,13,14- longitudinal defects；15,16,17,18- sensor units；N- magnetic field rotation direction.
Embodiment
Provide below in conjunction with the accompanying drawings the present invention embodiment, and by embodiment to the present invention based on
The steel pipe longitudinal defect magnetic leakage crack detection device of rotary magnetization is further described.It is important to note that the present invention
Embodiment is not limited to the form described by embodiment.
The direction term being previously mentioned in the embodiment below, for example：Up, down, left, right, before and after etc., only
It is the direction of refer to the attached drawing.Therefore, the direction term used is intended merely to facilitate the explanation present invention, not for limiting this hair
It is bright.
The steel pipe longitudinal defect magnetic leakage crack detection device based on rotary magnetization of the present embodiment, its structural representation such as Fig. 1
Shown, composition includes：Rotating magnetizer 1, area array sensor array 2, quadrupole magnetizing coil 4, area array sensor array bracket 5,
Field power supply 6, wave filter 7, amplifier 8 and A/D converter 9.Field power supply 6 is passed through phase asynchronous friendship to rotating magnetizer 1
Electricity is flowed, and then produces the rotary magnetization in space, steel pipe 3 during rotating magnetizer 1 by, by rotary magnetization circumferential magnetization, indulging
Defect magnetic flux leakage field is produced to fault location, the area array sensor of longitudinal defect correspondence position obtains stray field signal, and then is converted into
Electric signal, then sequentially passes through wave filter 7, amplifier 8, A/D converter 9 and enters computer.
The typical phase asynchronous alternating current provided using apparatus of the present invention, field power supply 6, as shown in Figure 2.Excitation power supply is produced
Three phase differences are electric for 120 ° of Asynchronous Communication:,,
, while into the quadrupole magnetizing coil 4 of rotating magnetizer 1.
Using apparatus of the present invention, rotating magnetizer 1 produces schematic diagram such as Fig. 3 a, Fig. 3 b, Fig. 3 c, the figure of rotary magnetization 10
Shown in 3d.The phase asynchronous alternating current I that excitation power supply is produced1,I2,I3Pass through the quadrupole magnetizing coil 4 of rotating magnetizer 1 respectively
（A、B、C、A’、B’、C’）Inflow and outflow.When phase asynchronous alternating current is in Fig. 2 I stage, electric current I1And I3For just, I2
Be negative, i.e. electric current is from A, C, B ' flow into, B, A ', C ' outflows, according to the law of electromagnetic induction and the right-hand rule, the magnetic now produced
Change field 10 as shown in Figure 3 a.When phase asynchronous alternating current is in Fig. 2 II stage, electric current I1For just, I2And I3Be it is negative, i.e.,
Outflow that electric current is from A, B ', C ' flow into, B, C, A ', according to the law of electromagnetic induction and the right-hand rule, the magnetizing field 10 now produced
As shown in Figure 3 b.When phase asynchronous alternating current is in Fig. 2 III stage, electric current I1And I2For just, I3Be it is negative, i.e., electric current from
A, B, C ' flow into, C, A ', B ' outflows, according to the law of electromagnetic induction and the right-hand rule, the magnetizing field 10 such as Fig. 3 c now produced
It is shown.When phase asynchronous alternating current is in Fig. 2 IV stage, electric current I2For just, I1And I3Be negative, i.e. electric current is from B, A ', C '
Flow into, A, C, B ' outflow, according to the law of electromagnetic induction and the right-hand rule, the magnetizing field 10 now produced is as shown in Figure 3 d.With
Phase asynchronous alternating current from the Ith stage to the IVth stage, the direction in magnetic field is will be obvious by up time from Fig. 3 a to Fig. 3 d
Pin direction rotates, and forms rotary magnetization.
As shown in figure 4, area array sensor array 2 is fixed on rotating magnetizer 1 by four area array sensor array brackets 5
Inside, encircles steel pipe 3, realizes that all standing to steel pipe 3 is detected.Area array sensor array 26 is enclosed totally, if being often evenly arranged on circle
Dry sensor unit, its quantity is determined by the outside diameter d of steel pipe.The internal diameter of area array sensor array 2 be D, its value than steel pipe outside
The big 1.0mm of footpath d.
As shown in figure 5, when there are longitudinal defect 11,12,13,14 in the steel pipe 3, steel pipe 3 is from area array sensor array
Inside is passed through, and the rotary magnetization produced by rotating magnetizer 10 is all-round to uniform magnetization, produces defect magnetic flux leakage field, defect correspondence
The pickup defect and magnetic leakage field signal of sensor unit 15,16,17,18 of position.
Claims (6)
1. a kind of steel pipe longitudinal defect magnetic leakage crack detection device based on rotary magnetization, it is characterised in that including：For producing rotation
Turn the rotating magnetizer (1) of magnetizing field, steel pipe is covered comprehensively and the area array sensor array (2) of defect and magnetic leakage signal, face is picked up
Array sensor array bracket (5), the field power supply (6) for producing phase asynchronous alternating current and the filter for signal transacting
Ripple device (7), amplifier (8), A/D converter (9).
2. the steel pipe longitudinal defect magnetic leakage crack detection device according to claim 1 based on rotary magnetization, it is characterised in that：
Rotating magnetizer is formed by enamel covered wire coiling, generally the two poles of the earth or quadrupole.
3. the steel pipe longitudinal defect magnetic leakage crack detection device according to claim 1 based on rotary magnetization, it is characterised in that：
Field power supply provides the phase asynchronous alternating current that amplitude is equal, phase difference is 120 °.
4. the steel pipe longitudinal defect magnetic leakage crack detection device based on rotary magnetization according to claim 1 or 3, its feature exists
In：The amplitude and frequency for the phase asynchronous alternating current that field power supply is provided can be adjusted according to detection requirement.
5. the steel pipe longitudinal defect magnetic leakage crack detection device according to claim 1 based on rotary magnetization, it is characterised in that：
The area array sensor array for being arranged in rotating magnetizer center carries out 360 ° to steel pipe between all standing, with steel tube surface
Lift-off distance generally 1.0mm.
6. the steel pipe longitudinal defect magnetic leakage crack detection device according to claim 1 or 5 based on rotary magnetization, its feature exists
In：The sensor array number of turns of area array sensor array is not less than 6, and sensor individual pen quantity is determined by outer diameter of steel pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710194579.3A CN106990164A (en) | 2017-03-29 | 2017-03-29 | A kind of steel pipe longitudinal defect magnetic leakage crack detection device based on rotary magnetization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710194579.3A CN106990164A (en) | 2017-03-29 | 2017-03-29 | A kind of steel pipe longitudinal defect magnetic leakage crack detection device based on rotary magnetization |
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| CN106990164A true CN106990164A (en) | 2017-07-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941901A (en) * | 2018-01-19 | 2018-04-20 | 沈阳工业大学 | A kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step |
| CN109725052A (en) * | 2019-01-31 | 2019-05-07 | 合肥中大检测技术有限公司 | The supporting mechanism of Magnetosensitive sensor array and steel pipe longitudinal defect leakage magnetic detection device |
| CN113728226A (en) * | 2019-04-24 | 2021-11-30 | 杰富意钢铁株式会社 | Magnetic leakage flaw detection device |
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| CN87201715U (en) * | 1987-02-02 | 1988-01-20 | 机械工业部第五设计研究院 | Additional magnetizer device in rotating magnetic field of intercross coil |
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| CN201561957U (en) * | 2009-11-22 | 2010-08-25 | 王枫 | Noncontact type magnetic powder flaw detecting device using three dimensional tridimensional rotating field |
| CN103995052A (en) * | 2014-05-22 | 2014-08-20 | 西安交通大学 | Small diameter tube structure electromagnetic ultrasonic non-destructive detection method based on rotating magnetic field |
| CN105334260A (en) * | 2015-11-09 | 2016-02-17 | 四川大学 | Steel tube pulse magnetization magnetic flux leakage detecting device |
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| CN87201715U (en) * | 1987-02-02 | 1988-01-20 | 机械工业部第五设计研究院 | Additional magnetizer device in rotating magnetic field of intercross coil |
| JP2005315810A (en) * | 2004-04-30 | 2005-11-10 | Sumitomo Metal Ind Ltd | Magnetizing equipment for detecting magnetic flaw in steel pipe |
| CN101236179A (en) * | 2008-01-31 | 2008-08-06 | 华南理工大学 | Multiphase eddy flow detection probe head |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941901A (en) * | 2018-01-19 | 2018-04-20 | 沈阳工业大学 | A kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step |
| CN107941901B (en) * | 2018-01-19 | 2024-03-01 | 沈阳工业大学 | High-speed magnetic flux leakage detection system based on step-by-step magnetic saturation structure |
| CN109725052A (en) * | 2019-01-31 | 2019-05-07 | 合肥中大检测技术有限公司 | The supporting mechanism of Magnetosensitive sensor array and steel pipe longitudinal defect leakage magnetic detection device |
| CN109725052B (en) * | 2019-01-31 | 2023-08-25 | 合肥中大检测技术有限公司 | Support mechanism of magnetic sensor array and steel pipe longitudinal defect magnetic leakage detection device |
| CN113728226A (en) * | 2019-04-24 | 2021-11-30 | 杰富意钢铁株式会社 | Magnetic leakage flaw detection device |
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Application publication date: 20170728 |