CN109884175A - A low-frequency electromagnetic combined with magnetic powder metal pipeline flaw detection device - Google Patents
A low-frequency electromagnetic combined with magnetic powder metal pipeline flaw detection device Download PDFInfo
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- CN109884175A CN109884175A CN201910262584.2A CN201910262584A CN109884175A CN 109884175 A CN109884175 A CN 109884175A CN 201910262584 A CN201910262584 A CN 201910262584A CN 109884175 A CN109884175 A CN 109884175A
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- 238000001514 detection method Methods 0.000 title claims abstract description 57
- 239000002184 metal Substances 0.000 title claims abstract description 25
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 21
- 230000005291 magnetic effect Effects 0.000 claims abstract description 73
- 239000007921 spray Substances 0.000 claims abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000007689 inspection Methods 0.000 claims abstract description 7
- 238000003860 storage Methods 0.000 claims abstract description 7
- 238000009826 distribution Methods 0.000 claims abstract description 4
- 239000000725 suspension Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 238000003491 array Methods 0.000 claims description 2
- 238000005286 illumination Methods 0.000 claims description 2
- -1 polyethylene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 238000004382 potting Methods 0.000 claims 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000000284 extract Substances 0.000 claims 1
- 239000003292 glue Substances 0.000 claims 1
- 239000006249 magnetic particle Substances 0.000 claims 1
- 238000003672 processing method Methods 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 21
- 239000012530 fluid Substances 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 10
- 239000000565 sealant Substances 0.000 abstract description 5
- 230000005415 magnetization Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000008054 signal transmission Effects 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
- 238000009659 non-destructive testing Methods 0.000 description 3
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention discloses a kind of metal pipeline flaw detection devices of low frequency electromagnetic combination magnetic powder, by cabinet, magnetic flaw detection ink storage tank, electro-hydraulic pump, magnetcisuspension fluid through-hole 1, outer tube sleeve, inner tube set, magnetcisuspension fluid through-hole 2, fixed pipe sleeve, spray chamber, spray head, data upload through-hole, strut, camera, wheel, detect lamp, permanent magnet, liner body, electron pouring sealant, field shaper, Hall element array composition.Magnetic testing records pipe surface magnetic powder distribution situation to metallic conduit surface spraying, then by camera by magnetic flaw detection ink；Magnetic Flux Leakage Inspecting is judged electric signal transmission to the host computer that is converted to that Hall element array picks up magnetic flux leakage by permanent magnet magnetization metallic conduit.It is rapidly completed in detection process by Magnetic testing and metallic conduit surface inspection is detected, the position for generating alarm is marked, it has gained some understanding in the preliminary situation to metallic conduit and then using Magnetic Flux Leakage Inspecting technology, judges whether metal pipe internal wall contains and have damage.
Description
Technical field
The invention belongs to ferromagnetism bearing device defect technical field of nondestructive testing, and in particular to a kind of low frequency electromagnetic combination
The metal pipeline flaw detection device of magnetic powder.
Background technique
Metallic conduit class pressure-bearing special equipment often subjects high/low temperature, inflammable, explosive, hypertoxic or rotten in the process of running
The high pressure of medium is lost, once explosion or the leakage usually catastrophic failures such as concurrent fire, poisoning and environmental pollution occur.Cause
This, it is ensured that special safety equipment is protection and the primary condition of society and economic heath development that expands social production forces, promotes.Magnetic
Powder detection and Magnetic Flux Leakage Inspecting are all currently used non-destructive testing technologies.
Magnetic Flux Leakage Inspecting technology is that ferromagnetic material is magnetized to saturation or nearly saturation state using magnetizing system, after testing
Magneto sensor of the device in each axial direction is acquired conversion to the magnetic leakage signal of defect area, according to signal characteristic software
Analyzing defect information determines its position and property.It is chiefly used in the detection of the internal flaw of ferrimagnet.
Magnetic testing technology is the magnetic flux leakage formed using ferromagnetic material in fault location, is interacted with magnetic powder, suitable
Visual visible defect is formed under the illumination condition of conjunction to show, is mainly used for the surface of ferrimagnet and the inspection of near surface flaw
It surveys.
Due to being always based on multiple detection goal tasks in actual metallic conduit non-destructive testing, need to detect tested pair
The number of drawbacks of elephant, it is also necessary to rapidly and efficiently.Although and existing magnetic powder inspection device can carry out magnetic flaw detection ink to metal tube automatically
The spray on road surface and magnetization, so that surface inspection detection be rapidly completed.But manpower painting is still relied on for metal pipe internal wall
After covering magnetic flaw detection ink, carrying out flaw detection is manually completed using portable magnetic powder flaw detector, large labor intensity, detection efficiency are low.It therefore is real
Existing above-mentioned detection target generally requires two kinds of detection techniques of Magnetic Flux Leakage Inspecting and Magnetic testing and is used in combination.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the invention to Magnetic Flux Leakage Inspecting technology and Magnetic testing technology, designs one
The metal pipeline flaw detection device of kind low frequency electromagnetic combination magnetic powder.While accelerating the speed of metallic conduit inside and outside wall detection, protect
Demonstrate,prove the validity of detection.Be conducive to further make reasonable evaluation to the safe condition of metallic conduit.
The invention is realized by the following technical scheme: as Fig. 1 structure drawing of device, Fig. 2 face perspective structure schematic diagram and Fig. 3
Shown in bottom substance schematic diagram, a kind of metal pipeline flaw detection device of low frequency electromagnetic combination magnetic powder, by cabinet (1), magnetic flaw detection ink storage
Case (2), electro-hydraulic pump (3), magnetcisuspension fluid through-hole 1 (4), outer tube sleeve (5), inner tube set (6), magnetcisuspension fluid through-hole 2 (7), fixed pipe sleeve
(8), spray chamber (9), spray head (10), data upload through-hole (11), strut (12), camera (13), wheel (14), detection
Lamp (15), permanent magnet (16), liner body (17), electron pouring sealant (18), field shaper (19), Hall element array (20) composition；Its
Be characterized in that: cabinet (1) is supported on tested metallic conduit by four wheels (14) and is moved；Electrically driven (operated) electro-hydraulic pump (3) is from magnetic
Magnetic flaw detection ink is extracted in suspension storage tank (2), is connected by magnetcisuspension fluid through-hole 1 (4) with the inner tube set (6) of conveying spray liquid, outer tube sleeve
(5) for fixing and being oriented to inner tube set (6)；Wherein, inner tube set (6) is connected with magnetcisuspension fluid through-hole 2 (7), and magnetic flaw detection ink passes through magnetic
Enter spray chamber (9) using fixed pipe sleeve (8) after suspension through-hole 2 (7), be connected spray head (10) spray with spray chamber (9)
It spills to pipe surface to be checked；It detects lamp (15) and irradiates pipe surface, camera (13) is under detection lamp (15) irradiation in cabinet row
Record pipeline magnetic powder distribution situation is during sailing in order to personnel's progress carrying out flaw detection；Electron pouring sealant (18) is by permanent magnet (16)
It is fixed in cabinet (1) with liner body (17), permanent magnet (16) magnetizable metal pipeline, field shaper (19) is collected, homogenizing, is oriented to sky
Between the magnetic flux leakage that is distributed, be channeled in the detection path of Hall element array (20), the Hall element of cabinet (1) bottom
Array (20) picks up magnetic flux leakage and is converted into electric signal；Electric signal uploads through-hole (11) by data again and is transmitted to host computer
Judged.Electric signal is transmitted to host computer by data upload through-hole (11) and is judged.It is examined in detection process by magnetic powder
Survey, which is rapidly completed, detects metallic conduit surface inspection, then by the way that the position for generating alarm is marked, to metallic conduit
Preliminary situation have gained some understanding and then using Magnetic Flux Leakage Inspecting technology, judge whether metal pipe internal wall contains slight crack, microgroove etc.
Damage.
The material of the magnetic flaw detection ink storage tank (2) is polyethylene, is cube, a length of 80mm, width 40mm are a height of
25mm.Magnetic flaw detection ink can be supplemented.
Inner tube set (6) internal diameter of the conveying spray liquid is about 10mm.
Described be connected with spray chamber (9) spray head (10) are installed for I type, and totally 4.
The camera (13) is 360 degree of visible image capturing heads.
The Hall element array (20) includes two column, I type Hall element array, using the double differential processing of arrangement
Method carries out data difference, phase bit comparison processing, with metallic conduit distance 5mm.
The device total volume is 350mm*200mm*150mm, total weight 3kg.
In described device structure, poly- magnetic technology principle is as follows: magnetic field B is redistributed after being acted on by field shaper (19), so that
The magnetic line of force largely gathers former and later two end faces of Hall element.Magnetic induction intensity in Hall element sensitive area is multiplied,
Input/output relation thereon are as follows:
VA(x)=kckh/[B(x)+B0] (1)
K in formulah--- indicate Hall element sensitivity coefficient；
kc--- indicate poly- magnetic system number；
/ --- indicate Hall element work constant-current source；
B0--- indicate leakage inductance intensity between magnetizing field pole shoe；
Bx--- indicate fracture of wire magnetic flux leakage magnetic induction intensity；
In described device structure, Hall element array detection principle are as follows: Hall element is one kind by matrix wafer
Material constitutes and the detecting element based on the work of Hall effect principle, has externally-applied magnetic field to hang down by it when being powered to Hall element
Histogram is to the element can generate Hall voltage, and the potential is directly proportional to electric current, magnetic field strength.In magnetic field, the Hall of output
Voltage are as follows:
Wherein KhFor hall constant；IcFor the control electric current of input；B is the magnetic induction degree in magnetic field；For magnetic induction intensity
Direction and Hall element working face between angle.The vertical wirerope surface of Hall element will be placed, can be eliminatedIt is right
The influence of Hall voltage can be obtained by formula, and when using certain control electric current, Hall voltage and magnetic induction intensity are directly proportional.Cause
When this detects magnetic flux leakage, the size of magnetic flux leakage can be judged according to the size of Hall voltage and then determines test specimen
Defect
The beneficial effects of the present invention are: Magnetic testing is rapidly completed to metal based on Magnetic Flux Leakage Inspecting, supplemented by Magnetic testing
Pipe surface carrying out flaw detection, Magnetic Flux Leakage Inspecting technology complete the carrying out flaw detection of metal pipe internal wall.Simplify people in metallic conduit detection
Power operating procedure and labor intensity can increase pendulous frequency in defined measurement range and promote measurement precision.Be conducive to
Improving detection efficiency has very strong innovative and practical value, there is good application prospect.
Detailed description of the invention
Fig. 1 is the metal pipeline flaw detection apparatus structure schematic diagram of low frequency electromagnetic combination magnetic powder.
Fig. 2 is that failure detector faces perspective structure schematic diagram.
Fig. 3 is the bottom substance schematic diagram of failure detector.
Specific embodiment
As shown in Figure 1, 2, 3, a kind of metal pipeline flaw detection device of low frequency electromagnetic combination magnetic powder, by cabinet (1), magnetic flaw detection ink
Storage tank (2), electro-hydraulic pump (3), magnetcisuspension fluid through-hole 1 (4), outer tube sleeve (5), inner tube set (6), magnetcisuspension fluid through-hole 2 (7), fixed pipe sleeve
(8), spray chamber (9), spray head (10), data upload through-hole (11), strut (12), camera (13), wheel (14), detection
Lamp (15), permanent magnet (16), liner body (17), electron pouring sealant (18), field shaper (19), Hall element array (20) composition.
In work process, detection process is divided into two processes of Magnetic Flux Leakage Inspecting and Magnetic testing.Cabinet (1) is by four wheels
(14) it is supported on tested metallic conduit and moves；Firstly, the electrically driven (operated) electro-hydraulic pump (3) of Magnetic testing is from magnetic flaw detection ink storage tank (2)
Magnetic flaw detection ink is extracted, is connected by magnetcisuspension fluid through-hole 1 (4) with the inner tube set (6) of conveying spray liquid, outer tube sleeve (5) is for fixing simultaneously
It is oriented to inner tube set (6)；Wherein, inner tube set (6) is connected with magnetcisuspension fluid through-hole 2 (7), after magnetic flaw detection ink passes through magnetcisuspension fluid through-hole 2 (7)
Enter spray chamber (9) using fixed pipe sleeve (8), sprays through the spray head (10) that is connected with spray chamber (9) to pipeline table to be checked
Face；It detects lamp (15) and irradiates pipe surface, camera (13) records pipe under detection lamp (15) irradiation in cabinet driving process
Road after magnetization magnetic powder distribution situation in order to personnel carry out carrying out flaw detection.
During Magnetic Flux Leakage Inspecting, permanent magnet (16) and liner body (17) are fixed in cabinet (1) by electron pouring sealant (18)；
Permanent magnet (16) magnetizable metal pipeline, the magnetic flux leakage that field shaper (19) is collected, homogenizing, guide space are distributed, is channeled to suddenly
In the detection path of your element arrays (20)；The Hall element array (20) of cabinet (1) bottom picks up magnetic flux leakage and by its turn
It is changed to electric signal；Electric signal is transmitted to host computer by data upload through-hole (11) and is judged.Pass through magnetic powder in detection process
Detection, which is rapidly completed, detects metallic conduit surface inspection, then by the way that the position for generating alarm is marked, to metal tube
The preliminary situation in road has gained some understanding and then using Magnetic Flux Leakage Inspecting technology, judges whether metal pipe internal wall contains slight crack, microgroove
Equivalent damage.
Claims (4)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910262584.2A CN109884175A (en) | 2019-04-02 | 2019-04-02 | A low-frequency electromagnetic combined with magnetic powder metal pipeline flaw detection device |
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| CN201910262584.2A CN109884175A (en) | 2019-04-02 | 2019-04-02 | A low-frequency electromagnetic combined with magnetic powder metal pipeline flaw detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568062A (en) * | 2019-09-17 | 2019-12-13 | 常州捷锐试验检测有限公司 | magnetic particle testing equipment for circumferential defects of inner wall of hole |
| CN112362729A (en) * | 2020-12-14 | 2021-02-12 | 青岛理工大学 | Steel wire rope flaw detection instrument based on magnetic leakage detection and optical detection |
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