CN204925036U - Compound magnetization unit of pipe end inside and outside wall non -contact - Google Patents
Compound magnetization unit of pipe end inside and outside wall non -contact Download PDFInfo
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- CN204925036U CN204925036U CN201520410233.9U CN201520410233U CN204925036U CN 204925036 U CN204925036 U CN 204925036U CN 201520410233 U CN201520410233 U CN 201520410233U CN 204925036 U CN204925036 U CN 204925036U
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Abstract
The utility model relates to a compound magnetization unit of pipe end inside and outside wall non -contact, the device include circumference yoke (4), circumference magnetic head interval guiding mechanism, vertical magnetizing coil (3), surface shower (11) and the inside special compound bar magnet (22) that magnetizes, vertical magnetizing coil (3) encircle the pipe end, circumference yoke (4) set up in pipe end circumference, circumference magnetic head interval guiding mechanism and circumference yoke (4) the interval of being connected and adjusting its magnetic head, surface shower (11) set up at the pipe end outsidely to it is connected to magnetize bar magnet (22) with the setting in the inside inside special complex of pipe end. Compared with the prior art, the utility model discloses the device can avoid the direct passage of current to cause the part to burn, there is not the blind area of detecting a flaw, circumference yoke size is adjustable, is applicable to the pipe wall flaw detection of multiple size, increase inside special compound magnetization bar magnet, combine two alternating current coil applied magnetic field to draw abfarad, the accurate inner wall crackle that detects.
Description
Technical field
The utility model relates to a kind of compound magnetizer for magnetic particle inspection, especially relates to the contactless compound magnetizer for magnetic particle inspection of a kind of pipe end inside and outside wall.
Background technology
Magnetic powder inspection utilizes magnetizing assembly magnetize ferrimagnet and apply magnetic flaw detection ink or magnetic, can form stray field when material surface or nearly surperficial defectiveness, if not existing defects on the workpiece after being magnetized, then and being evenly distributed of its each position magnetic line of force; If when workpiece exists approximate vertical with magnetic line of force crackle, pore or nonmetal slag inclusion, the magnetic resistance of rejected region hinders passing through of the magnetic line of force, and the magnetic line of force is walked around defect and produces bending.When defect is positioned at piece surface or nearly surface, the magnetic line of force not only produces bending in inside, but also some walks around defect, and effusion surface of the work, exposes in atmosphere, forms stray field; If apply magnetic at surface of the work or spray magnetic flaw detection ink, then part magnetic can be adsorbed by the magnetic field that rejected region produces, and now staff carries out observing the state that magnetic trace can judge material.
In pipe end magnetic powder inspection, generally adopt the mode of magnetization of circumference energising and single longitudinal coil compound.Easily cause part to burn because loose contact produces sparking during circumference energising, more importantly electrical current skewness can cause undetected; Single longitudinal coil magnetization can present magnetic pole in pipe end termination, can produce demagnetizing field, is unfavorable for the longitudinal magnetization of pipe end termination; And this kind of method inspection does not measure inner surface cracks.
Publication number is that the Chinese patent of CN101526500A discloses a kind of inspection composite magnetizer adopting tube end inside-and-outside wall induction, the pedestal of this magnetizing apparatus fits over reciprocally displacement on horizontal guide rail, be furnished with vertical rail at the right flank of pedestal, sliding shoe can up and down reciprocatingly displacement in vertical rail; The bottom of U-shaped yoke iron core is fixed on the right flank of sliding shoe, and its U-shaped opening opens wide to the right; Longitudinal coil is spring-like helically, within outside longitudinal coil one week, is fixed on the inner face of U-shaped yoke iron core upper arm, makes the underarm of U-shaped yoke iron core fit in longitudinal coil endoporus; U-shaped yoke iron core underarm inner face is fixed with lower motor head; The device U-shaped yoke iron core upper wall is furnished with the upper electrode tip relative with lower electrode tip and driven upper electrode tip flexible.This magnetizing apparatus can by the circumference of pipeline section inside and outside wall and longitudinal flux trace be clear shows, but this magnetizing apparatus needs to be energized to workpiece, if the floating dust on tube wall and iron rust are mended clearly clean, easily causes loose contact, causes sparking, cause workpiece to be burnt.
Utility model content
The purpose of this utility model is exactly provide the contactless compound magnetizer for magnetic particle inspection of pipe end inside and outside wall of a kind of non-blind area, not injuring part to overcome defect that above-mentioned prior art exists.
The purpose of this utility model can be achieved through the following technical solutions:
The contactless compound magnetizer for magnetic particle inspection of a kind of pipe end inside and outside wall, for detecting the damage of pipe end inside and outside wall, it is characterized in that, this device comprises circumferential yoke, circumference magnetic head spacing adjusting mechanism, longitudinal magnetization coil, outside surface shower and internal proprietary resultant magnetization bar magnet, described longitudinal magnetization coil encircling pipe end, described circumferential yoke is arranged on pipe end circumference, described circumferential magnetic head spacing adjusting mechanism is connected with circumferential yoke and regulates the spacing of its magnetic head, described outside surface shower is arranged on pipe end outside, and be connected with the internal proprietary resultant magnetization bar magnet being arranged on pipe end inside.
Described circumferential yoke is provided with two groups, each group comprises coil in circumferential upper magnetic head, circumference, week magnetic head and circumferential lower coil downwards, in described circumference, coil is wrapped on circumferential upper magnetic head, described circumferential lower coil is wrapped on week downward magnetic head, in circumference, coil is connected with circumferential lower coil, described circumferential upper magnetic head and week downward head relative arrange, two groups of circumference yoke integral loop, around pipe end circumference, form magnetic circuit loop in pipe end circumference.
Two groups of described circumference yokes are energized successively, and conduction time is spaced apart 500 ~ 1000ms, to form complete magnetic circuit in pipe end circumference.
Described circumferential upper magnetic head and week downward magnetic head be arranged on pipe end outer wall, in described circumference, coil and circumferential lower coil and pipe end are isolated, and make pipe end form contactless magnetization.
Described circumferential magnetic head spacing adjusting mechanism comprises shaft coupling, motor, two elevating levers and two vertical axis of guides, described shaft coupling connects two elevating levers, two elevating lever lower ends are connected with two circumferential upper magnetic heads, described motor drives two elevating levers synchronously to move up and down along two vertical axis of guides, drive two circumferential upper magnetic heads to move up and down, adjust the spacing between two circumferential upper magnetic heads and week downward magnetic head.
Described longitudinal magnetization coil is provided with two groups, and wherein one group is looped around pipe end section part, and another group is looped around apart from outside pipe end section 300 ~ 500mm pipe outer wall, forms two AC coil, forms externally-applied magnetic field.
Be provided with at the pipeline section section part of pipe end and extend rod, this extension rod is arranged on low order end (outside of right magnetizing coil), and diameter is 365mm (meeting maximum pipe end overall diameter), length 80mm, and material is high-quality electrical pure iron.Be close on pipe end end face when pipe transmission to be measured enters.Internal proprietary resultant magnetization bar magnet is fixed on this extension rod centre, integral with extension clavate, can upper and lower adjustment centre-height, detects with the pipe of applicable different-diameter.
Described internal proprietary resultant magnetization bar magnet is hollow-core construction, and be fixed on the plug holder that can slide up and down along slide rail, internal proprietary resultant magnetization bar magnet offers honeycomb pore, is connected with outside surface shower.
Described internal proprietary resultant magnetization bar magnet is electrical pure iron rod.
Compared with prior art, the utility model has the following advantages:
(1) circumferential yoke formula is magnetized to contactless magnetization, causes part to burn when avoiding direct-electrifying because loose contact produces sparking.
(2) circumferential yoke adopts two groups of yokes to magnetize respectively, solves the problem that there is flaw detection blind area because magnetic pole contact gap makes contact position.
(3) circumferential yoke formula, the magnetization of longitudinal twin coil are contactless resultant magnetization, are conducive to the crack detection of pipe end end portion, compare with former circumferential direct-electrifying with single longitudinal coil magnetization, can not be undetected.
(4) circumferential yoke size is adjustable, is applicable to the tube wall carrying out flaw detection of sizes.
(5) add internal proprietary resultant magnetization bar magnet, and spray pressure is adjustable, compensate for the defect that in the past can not detect inner surface cracks.
(6) two AC coil externally-applied magnetic field draws magnetic method, longitudinal magnetic field is strengthened in length, and the radial cracking of pipe end end face when can detect longitudinal magnetization, detects more comprehensively.
(7) internal proprietary resultant magnetization bar magnet adopts pure electrician's iron staff, and electromagnetic performance is good, and coercive force is low, and magnetic permeability mu is high, and saturated magnetic strength is high, and magnetic stability is again without magnetic aging, and testing result is more accurate.
Accompanying drawing explanation
Fig. 1 is the side view of this device;
Fig. 2 is the front view of this device;
Fig. 3 is internal proprietary resultant magnetization bar magnet place part-structure figure in this device;
Number in the figure: 1 is lathe bed, 3 is longitudinal magnetization coil, and 4 is circumferential yoke, and 5 is the vertical axis of guide, 6 is shaft coupling, and 7 is elevating lever, and 10 is motor, and 11 is outside surface shower, 12 is circumferential b lower coil, and 13 is magnetic head under circumferential b, and 14 is circumferential a upper magnetic head, 15 is coil on circumferential a, and 17 is circumferential b upper magnetic head, and 18 is coil on circumferential b, 19 is magnetic head under circumferential a, and 20 is circumferential a lower coil, and 21 is plug holder, 22 is internal proprietary resultant magnetization bar magnet, and 25 is slide rail, and 26 is handwheel.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.The present embodiment is implemented premised on technical solutions of the utility model, give detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Embodiment
The contactless compound magnetizer for magnetic particle inspection of the utility model pipe end inside and outside wall, for detecting the damage of pipe end inside and outside wall, as shown in Fig. 1 ~ 2, this device comprises circumferential yoke 4, circumferential magnetic head spacing adjusting mechanism, longitudinal magnetization coil 3, outside surface shower 11 and internal proprietary resultant magnetization bar magnet 22, wherein, longitudinal magnetization coil 3 is provided with two groups, wherein one group is looped around pipe end section part, another group is looped around apart from outside pipe end section 300 ~ 500mm pipe outer wall, form two AC coil, form additional axial magnetic field.
Circumference yoke 4 is provided with two groups, and first group to comprise on circumferential a upper magnetic head 14, circumferential a magnetic head 19 and circumferential a lower coil 20, second group under coil 15, circumferential a and to comprise on circumferential b upper magnetic head 17, circumferential b magnetic head 13 and circumferential b lower coil 12 under coil 18, circumferential b.For first group, on circumference a, coil 15 is wrapped on circumferential a upper magnetic head 14, circumference a lower coil 20 is wrapped under circumferential a on magnetic head 19, and on circumferential a, coil 15 is connected with circumferential a lower coil 20 and isolates with pipe end, and under circumferential a upper magnetic head 14 and circumferential a, magnetic head 19 is oppositely arranged on pipe end outer wall; Second group of structure is identical with first group.Two groups of circumference yoke 4 integral loop, around pipe end circumference, make pipe end form contactless magnetization, form magnetic circuit loop in pipe end circumference.Two groups of circumference yokes 4 are energized successively, are spaced apart 500 ~ 1000ms (setting according to diameter difference) conduction time, to form complete magnetic circuit in pipe end circumference, solve the problem that there is flaw detection blind area because magnetic pole contact gap makes contact position.
Circumference magnetic head spacing adjusting mechanism comprises shaft coupling 6, motor 10, two elevating levers 7 and two vertical axis of guides 5, shaft coupling 6 connects two elevating levers 7, two elevating lever 7 lower ends are connected with two circumferential upper magnetic heads, motor 10 drives two elevating levers 7 synchronously to move up and down along two vertical axis of guides 5, two circumferential upper magnetic heads are driven to move up and down, adjust the spacing between two circumferential upper magnetic heads and week downward magnetic head, to adapt to the tube wall of different-diameter.
Be provided with at the pipeline section section part of pipe end and extend rod, this extension rod is arranged on low order end (outside of right magnetizing coil), and diameter is 365mm (meeting maximum pipe end overall diameter), length 80mm, and material is high-quality electrical pure iron.Be close on pipe end end face when pipe transmission to be measured enters.Internal proprietary resultant magnetization bar magnet is fixed on this extension rod centre, integral with extension clavate, can upper and lower adjustment centre-height, detects with the pipe of applicable different-diameter.
Outside surface shower 11 is arranged on pipe end outside, for spraying magnetisable material at pipe end outer wall.
As shown in Figure 3, internal proprietary resultant magnetization bar magnet 22 is the electrical pure iron rod of hollow-core construction, be set in plug holder 21, by rotation hand wheel 26, plug holder 21 can be made to slide up and down along slide rail 25, thus the upper-lower position of adjustment internal proprietary resultant magnetization bar magnet 22, it is made to be in the axial location of tested pipe end, internal proprietary resultant magnetization bar magnet 22 offers honeycomb pore, be connected with outside surface shower 11, spray pressure is adjustable, in order to evenly to spray the magnetisable materials such as magnetic at inwall.Internal proprietary resultant magnetization bar magnet 22 uses special process, and (bar magnet material is electrical pure iron, and inside is hollow-core construction, offers honeycomb pore, is connected with outside surface shower (11).After processing, first longitudinal direction coiling circumference coil on bar magnet, then coiling longitudinal coil in a lateral direction outside, thus form specific complex magnetization bar magnet) coiling two groups of cross coils.
This device principle of work is:
1) utilize circumferential yoke 4 to form circumferential yoke and detect tube end outer surface radial cracking.Yoke method, also known as yoke method, is utilize electromagnetic yoke to workpiece magnetizing, and its advantage does not have electric current in workpiece, can avoid the burn of workpiece.Yoke method is very beneficial for the detection of pole class workpiece, if but magnetic pole and absorption surface bad, gap is had to exist, magnetic field intensity is also had a certain impact, so this device distance between two poles can by circumferential magnetic head spacing adjusting mechanism adjustment, to adapt to the workpiece of different-diameter, simultaneously good with absorption surface as much as possible.In addition, magnetic pole contact gap can make contact position have great stray field, and thus magnetic by its attraction, will also exist flaw detection blind area.Blind area scope increases along with the increase in gap.When being 3 millimeters in gap, blind area width is about 15 millimeters, generally, also has 2 ~ 3 millimeters.In order to overcome this shortcoming, this device has set up again one group of circumference yoke on former circumferential yoke side, during magnetization, at the end of one group of circumference yoke magnetization, is switched to rapidly another and organizes in circumferential yoke and magnetize once again, make circumferential magnetization non-blind area.
2) internal proprietary resultant magnetization bar magnet 22 is utilized to detect inner surface cracks.Bar magnet be highly purified electrical pure iron rod, electromagnetic performance is good, coercive force is low, magnetic permeability mu is high, saturated magnetic strength is high, magnetic stability, without magnetic aging.AC magnetizing current simultaneously by two groups of outs of phase on coil on internal proprietary resultant magnetization bar magnet 22, forms resultant magnetization.
3) utilize two AC coil externally-applied magnetic field to draw magnetic method and detect the defect vertical with coil axle.Coil method is placed in alive magnetic plug by workpiece and magnetizes, this device draws magnetic method owing to adopting two AC coil externally-applied magnetic field, connect and extend that rod is artificial draws length by pipe end termination, when making twin coil longitudinal magnetization, magnetic field covers the long radial cracking of pipe end 400mm completely, with the above-mentioned 2nd) put comprehensively, disposablely can detect all defect on pipe end inwall.
Claims (9)
1. the contactless compound magnetizer for magnetic particle inspection of pipe end inside and outside wall, for detecting the damage of pipe end inside and outside wall, it is characterized in that, this device comprises circumferential yoke (4), circumference magnetic head spacing adjusting mechanism, longitudinal magnetization coil (3), outside surface shower (11) and internal proprietary resultant magnetization bar magnet (22), described longitudinal magnetization coil (3) is around pipe end, described circumferential yoke (4) is arranged on pipe end circumference, described circumferential magnetic head spacing adjusting mechanism is connected with circumferential yoke (4) and regulates the spacing of its magnetic head, described outside surface shower (11) is arranged on pipe end outside, and be connected with the internal proprietary resultant magnetization bar magnet (22) being arranged on pipe end inside.
2. the contactless compound magnetizer for magnetic particle inspection of a kind of pipe end inside and outside wall according to claim 1, it is characterized in that, described circumferential yoke (4) is provided with two groups, each group comprises circumferential upper magnetic head, coil in circumference, week is magnetic head and circumferential lower coil downwards, in described circumference, coil is wrapped on circumferential upper magnetic head, described circumferential lower coil is wrapped on week downward magnetic head, in circumference, coil is connected with circumferential lower coil, described circumferential upper magnetic head and week downward head relative arrange, two groups of circumference yoke (4) integral loop are around pipe end circumference, magnetic circuit loop is formed in pipe end circumference.
3. the contactless compound magnetizer for magnetic particle inspection of a kind of pipe end inside and outside wall according to claim 2, is characterized in that, two groups of described circumferences yoke (4) are energized successively, and conduction time is spaced apart 500 ~ 1000ms, to form complete magnetic circuit in pipe end circumference.
4. the contactless compound magnetizer for magnetic particle inspection of a kind of pipe end inside and outside wall according to claim 2, it is characterized in that, described circumferential upper magnetic head and week downward magnetic head be arranged on pipe end outer wall, in described circumference, coil and circumferential lower coil and pipe end are isolated, and make pipe end form contactless magnetization.
5. the contactless compound magnetizer for magnetic particle inspection of a kind of pipe end inside and outside wall according to claim 2, it is characterized in that, described circumferential magnetic head spacing adjusting mechanism comprises shaft coupling (6), motor (10), two elevating levers (7), with two vertical axis of guides (5), described shaft coupling (6) connects two elevating levers (7), two elevating lever (7) lower ends are connected with two circumferential upper magnetic heads, described motor (10) drives two elevating levers (7) synchronously to move up and down along two vertical axis of guides (5), two circumferential upper magnetic heads are driven to move up and down, adjust the spacing between two circumferential upper magnetic heads and week downward magnetic head.
6. the contactless compound magnetizer for magnetic particle inspection of a kind of pipe end inside and outside wall according to claim 1, it is characterized in that, described longitudinal magnetization coil (3) is provided with two groups, wherein one group is looped around pipe end section part, another group is looped around apart from outside pipe end section 300 ~ 500mm pipe outer wall, form two AC coil, form externally-applied magnetic field.
7. the contactless compound magnetizer for magnetic particle inspection of a kind of pipe end inside and outside wall according to claim 1 or 6, it is characterized in that, be provided with at the pipeline section section part of pipe end and extend rod, the material of this extension rod is high-quality electrical pure iron, described internal proprietary resultant magnetization bar magnet (22) is fixed on this extension rod centre, integral with extension clavate.
8. the contactless compound magnetizer for magnetic particle inspection of a kind of pipe end inside and outside wall according to claim 1, it is characterized in that, described internal proprietary resultant magnetization bar magnet (22) is hollow-core construction, be fixed on the plug holder that can slide up and down along slide rail, internal proprietary resultant magnetization bar magnet (22) offers honeycomb pore, is connected with outside surface shower (11).
9. the contactless compound magnetizer for magnetic particle inspection of a kind of pipe end inside and outside wall according to claim 1 or 8, is characterized in that, described internal proprietary resultant magnetization bar magnet (22) is electrical pure iron rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520410233.9U CN204925036U (en) | 2015-06-15 | 2015-06-15 | Compound magnetization unit of pipe end inside and outside wall non -contact |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520410233.9U CN204925036U (en) | 2015-06-15 | 2015-06-15 | Compound magnetization unit of pipe end inside and outside wall non -contact |
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| CN204925036U true CN204925036U (en) | 2015-12-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490408A (en) * | 2019-01-22 | 2019-03-19 | 射阳县智能探伤设备有限公司 | A kind of magnaflux of adjustable detection spacing |
| 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 |
| CN113092573A (en) * | 2021-04-19 | 2021-07-09 | 中国特种设备检测研究院 | High pressure hydrogen storage container internal surface defect detection device |
-
2015
- 2015-06-15 CN CN201520410233.9U patent/CN204925036U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490408A (en) * | 2019-01-22 | 2019-03-19 | 射阳县智能探伤设备有限公司 | A kind of magnaflux of adjustable detection spacing |
| 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 |
| CN113092573A (en) * | 2021-04-19 | 2021-07-09 | 中国特种设备检测研究院 | High pressure hydrogen storage container internal surface defect detection device |
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