CN203133025U - Large ring unit magnetic powder inspection magnetization device - Google Patents
Large ring unit magnetic powder inspection magnetization device Download PDFInfo
- Publication number
- CN203133025U CN203133025U CN 201220727442 CN201220727442U CN203133025U CN 203133025 U CN203133025 U CN 203133025U CN 201220727442 CN201220727442 CN 201220727442 CN 201220727442 U CN201220727442 U CN 201220727442U CN 203133025 U CN203133025 U CN 203133025U
- Authority
- CN
- China
- Prior art keywords
- magnetic powder
- powder inspection
- winding around
- yoke
- magnetization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a large ring unit magnetic powder inspection magnetization device which comprises a magnetic powder inspection magnetization fixing seat and a magnetic powder inspection magnetization frame which can move relative to each other, wherein contact type winding coils are arranged at two ends of the magnetic powder inspection magnetization fixing seat; wiring terminals, which can be connected with a magnetization power supply, are arranged on the contact type winding coils; contacts, which can be meshed with each other, are arranged on the contact type winding coils; a linear movable magnet yoke and a U-shaped fixed magnet yoke are arranged on the magnetic powder inspection magnetization frame; exciting coils wind the linear movable magnet yoke and the U-shaped fixed magnet yoke; and the linear movable magnet yoke penetrates through a part hole of a detected large ring unit and then is connected with the U-shaped fixed magnet yoke to form a closed circuit magnet yoke. The device has the advantages of simple structure, high safety and reliability, ingenious design, simplicity in operation, convenience in measurement and accuracy and reliability of detection results; and workpieces can be wholly magnetized, and the magnetization effect is ideal in the process of detecting parts.
Description
Technical field
The utility model relates to a kind of magnetic powder inspection magnetizing assembly, particularly a kind of large-sized annular spare magnetic powder inspection magnetizing assembly.
Background technology
At present, magnetic powder inspection utilizes magnetic phenomenon to detect surface of the work and near surface flaw, and it is the most frequently used a kind of in the flux-leakage detection method.The basis of magnetic powder inspection is the magnetic interaction of fault location stray field and magnetic.Behind ferromagnetic material or the workpiece magnetizing, the fault location magnetic line of force that reaches nearly surface on the surface deforms, and the effusion surface of the work forms magnetic pole and also forms detectable stray field.At this moment, sprinkle magnetic or water magnetic flaw detection ink at surface of the work, the magnetic particle just can be adsorbed on defect area, demonstrates position, shape and the size of defective, the ultimate principle of magnetic powder inspection that Here it is.When the magnetic line of force was vertical with defective, stray field was the strongest, also was conducive to most detecting of defective; And if parallel with crackle, then the magnetic leakage free field produces, and defective can not be detected.In order to find all defectives, so extend, developed various Magnitizing method, in order to set up the magnetic field of various different directions at workpiece.Direction according to set up magnetic field at workpiece generally can be divided into circumferential magnetization, longitudinal magnetization and multidirectional magnetization.Circumferential magnetization means to workpiece and directly switches on, and electric current flow through run through the conductor in workpiece centre hole, is intended to set up in the workpiece one around workpiece and the closed magnetic field vertical with workpiece spindle, and the magnetic line of force has closed shape.Circumferential magnetization is mainly used in finding the defective with the workpiece axially parallel, i.e. the defective parallel with direction of current.Longitudinal magnetization mean with electric current by around coil, make workpiece magnetizing method along the longitudinal direction, the magnetic line of force in the workpiece is parallel to the axial line of coil.Longitudinal magnetization is mainly used in finding with workpiece spindle to vertical defective.Utilize the electromagnetic yoke magnetization to make the magnetic line of force be parallel to workpiece spindle to also belonging to this class of longitudinal magnetization.Multidirectional magnetization means by resultant magnetization and makes it in workpiece to produce a size and the direction magnetic field that changes of circular or spirality in time.Because the direction in magnetic field is constantly changing on workpiece, so can check out the defective of different directions.Excitation supply is provided by the low-voltage and high-current that transformer secondary output produces usually.
For the circumferential magnetization of annular, dish type or hollow workpiece, adopt excellent method or the cable winding method of wearing usually.Wearing excellent method is the method that an electrical conductor is penetrated annular, dish type or hollow workpiece, is called central conductor method or central conductor method again.This method mainly for detection of along workpiece spindle to longitudinal defect, can find the axial flaw of workpiece surfaces externally and internally and the radially defective of both ends of the surface simultaneously.Owing to wear the magnetic field intensity of excellent method and the diameter of workpiece is inversely proportional to, magnetic field near the center pit surface is stronger than outer surface magnetic field, Distribution of Magnetic Field is very inhomogeneous, the particularly annular that the difference of inside and outside diameter is bigger, dish type or hollow workpiece, and strong outer weak phenomenon is more serious in its Distribution of Magnetic Field; And for the bigger annular of external diameter, dish type or hollow workpiece, the workpiece outside will reach enough magnetic field, and it is very big to wear excellent electric current, and power consumption, magnetization precision are difficult to control.
Artificial cable winding method is to twine annular, dish type or hollow workpiece energising magnetizing method with flexible cable, when adopting this method to magnetize, as long as cable twines evenly, Distribution of Magnetic Field on the workpiece is more even, can form along the Circumferential field of workpiece circumferencial direction, be used for finding the radially defective parallel with magnetization current, also can find the axial flaw of workpiece surfaces externally and internally and the radially defective of two sides simultaneously.Its shortcoming is that artificial winding is loaded down with trivial details, and artificial consistance of twining is poor, and inefficiency is not suitable for batch detection.
For the longitudinal magnetization of annular, dish type or hollow workpiece, adopt coil method or yoke method usually.This method is mainly used in finding with workpiece spindle to vertical defective.Coil method normally is placed on workpiece magnetizing method in the alive magnetic plug, and this method is mainly used in finding with coil axes to vertical defective.Its shortcoming is that the workpiece two ends are magnetic pole, can produce demagnetizing field to the magnetization of annular, dish type or hollow workpiece the time, with the length of workpiece and diameter ratio (L/D) the little more difficult magnetization of healing of substantial connection, L/D is arranged.On the other hand, there is the region between the heart and the diaphragm district in this method to the endoporus of annular, dish type or hollow workpiece magnetizable not.
Yoke method claims yoke method again, is to utilize electromagnetic yoke to the method for workpiece magnetizing, and this method is found the defective vertical with the two poles of the earth line easily with the part of workpiece as magnetic circuit.This method is applicable to the local magnetized to workpiece, and incompatible Overall magnetization to annular, dish type or hollow workpiece is so the existing magnetic powder inspection magnetizing assembly detection heavy parts that utilizes is still perfect inadequately.
Summary of the invention
The purpose of this utility model is: a kind of simple in structure, novel in design, esy to use, safe and reliable, flaw detection efficient height is provided, reduces a kind of large-sized annular spare magnetic powder inspection magnetizing assembly of operator's labour intensity, to overcome the deficiencies in the prior art.
The utility model is constructed as follows: a kind of large-sized annular spare magnetic powder inspection magnetizing assembly, comprise relatively-movable magnetic powder inspection magnetization holder and magnetic powder inspection magnetization frame, two ends at magnetic powder inspection magnetization holder are provided with the contact winding around, the contact winding around is provided with the connection terminal that can be connected with excitation supply, the contact winding around is diffusion type to detected large-sized annular spare both ends of the surface, formed by the outside radial many strip conductors line in center, the contact winding around is provided with can intermeshing contact, and the contact that holder left side contact winding around is magnetized in the hole in piece part that the contact winding around that arranges on the magnetic powder inspection magnetization holder right side passes detected large-sized annular spare and magnetic powder inspection is meshed and is connected; Magnetic powder inspection magnetization frame is provided with fixedly yoke of the removable yoke of " one " font and " U " font, the removable yoke of " one " font and " U " font fixedly yoke be wound with drive coil, the hole in piece part that the removable yoke of " one " font is passed detected large-sized annular spare and " U " font be the yoke closed circuit yoke of composition that is connected fixedly.
Per two adjacent conductor lines compartment of terrains, center of the contact winding around of detected workpiece left side set gradually to connecting and not being connected, per two adjacent conductor lines compartment of terrains, center of the contact winding around of detected workpiece right side are set to not be connected and be connected with the left side successively accordingly, make current path of the whole formation of winding around of two end faces.
Contact is by the engagement of little air cylinder driven engagement hold-down mechanism, and every group of contact engagement back is connected the current path of a closure of conductor lines formation of many correspondences with corresponding conductor lines.
Many strip conductors line of contact winding around is more than 3.
Employed excitation supply is the AC power with A, B, C three-phase, and two terminals of open-close type winding around connect A, B two-phase, and two terminals of the elementary drive coil of the closed circuit yoke of open-close type connect B, C two-phase or A, C two-phase.
Owing to adopted technique scheme, large-sized annular workpiece to be detected is placed on the carrying roller, carrying roller is driven by rotating mechanism, make the workpiece rotation, when detecting, contact that hole in piece part that the contact winding around that arranges on the holder right side passes detected large-sized annular spare and magnetic powder inspection magnetize holder left side contact winding around is magnetized in magnetic powder inspection to be meshed and to be connected, the hole in piece part that the removable yoke of " word " shape is passed detected large-sized annular spare and " U word " shape be the yoke closed circuit yoke of composition that is connected fixedly, the drive coil terminal of closed circuit yoke connects excitation supply, detected workpiece itself is as secondary coil, by with the secondary winding of annular workpieces as closed circuit yoke, can magnetize whole workpiece, owing to adopted technique scheme, the utility model compared with prior art, the utility model not only has simple in structure, safe and reliable advantage, and design ingenious, simple to operate, it is convenient to measure, can magnetize whole workpiece, magnetization is satisfactory for result when detecting part, testing result waits advantage accurately and reliably.
Description of drawings.
Fig. 1 is the structural representation of the utility model device;
Fig. 2 is the vertical view of Fig. 1;
Structural representation when Fig. 3 is this magnetic powder inspection magnetizing assembly detection large-sized annular spare;
Fig. 4 is the left view of Fig. 3;
Fig. 5 is the syndeton synoptic diagram of clamping cylinder, square shape support and clamping piece;
Description of reference numerals: 1-magnetic powder inspection magnetization holder, 2-contact winding around, 3-connection terminal, the 4-contact, the removable yoke of 5-" " font, 6-" U " font is yoke fixedly, the 7-drive coil, 8-large-sized annular spare, 9-left side winding around, the right winding around of 10-, the 11-clamping cylinder, 12-square shape support, 13-clamping piece, 14-magnetic powder inspection magnetization frame, the 15-carrying roller.
Embodiment.
The utility model is described in further detail below in conjunction with drawings and Examples.
Enforcement of the present utility model: large-sized annular spare magnetic powder inspection magnetizing assembly, comprise relatively-movable magnetic powder inspection magnetization holder 1 and magnetic powder inspection magnetization frame 14, two ends at magnetic powder inspection magnetization holder 1 are provided with contact winding around 2, contact winding around 2 is provided with the connection terminal 3 that can be connected with excitation supply, be diffusion type in 2 pairs of detected large-sized annular spare both ends of the surface of contact winding around, formed by the outside radial many strip conductors line in center, contact winding around 2 is provided with can intermeshing contact 4, and the contact 4 that holder 1 left side contact winding around 2 is magnetized in the hole in piece part that the contact winding around 2 that arranges on magnetic powder inspection magnetization holder 1 right side passes detected large-sized annular spare and magnetic powder inspection is meshed and is connected; Magnetic powder inspection magnetization frame 14 is provided with fixedly yoke 6 of the removable yoke 5 of " one " font and " U " font, the removable yoke of " one " font 5 and " U " font fixedly yoke 6 be wound with drive coil 7, the hole in piece part that the removable yoke 5 of " one " font is passed detected large-sized annular spare and " U " font be the yoke 6 closed circuit yoke of composition that is connected fixedly.
Per two adjacent conductor lines compartment of terrains, center of the contact winding around 2 of detected workpiece left side set gradually to connecting and not being connected, per two adjacent conductor lines compartment of terrains, center of the contact winding around 2 of detected workpiece right side are set to not be connected and be connected with the left side successively accordingly, make current path of the whole formation of winding around of two end faces.
Contact 4 is by the engagement of little air cylinder driven engagement hold-down mechanism, and every group of contact engagement back is connected the current path of a closure of conductor lines formation of many correspondences with corresponding conductor lines.
Many strip conductors line of contact winding around 2 is more than 3.
Employed excitation supply is the AC power with A, B, C three-phase, and two terminals of open-close type winding around connect A, B two-phase, and two terminals of the elementary drive coil of the closed circuit yoke of open-close type connect B, C two-phase or A, C two-phase.
As shown in Figure 1, when large-sized annular spare 8 is diameter 1150mm, length 1020mm, the annular workpieces of endoporus 730mm, annular workpieces such as locomotive engine shell for example, the magnetic powder inspection magnetizing assembly comprises contact winding around 2 and the closed circuit yoke of open-close type, it is the copper rod of 15 * 40 mm or the left winding around 9 that copper bar is made by specification that contact winding around 2 has two group of 4 circle, right winding around 10, it is shaped as fork-shaped, two groups of winding arounds are separately fixed at detected workpiece both sides, thickness is two epoxy resin board inboards of 15mm, epoxy resin board is connected with the motion of failure detector by magnetic powder inspection magnetization holder 1, not only play fixation but also play the turn-to-turn insulation effect, left side winding around 9, the structure of right winding around 10 is open-close type, left side winding around 9, right winding around 10 is connected by the conductor lines at the outer diametric plane place of detected workpiece, the engagement hold-down mechanism that clamping cylinder 11 drives is equipped with in the contact engagement place, in the square shape support 12 of engagement hold-down mechanism left winding around contact is housed, contact one side is the inclined-plane contact chip, clamping piece 13 also is housed in the square shape support 12, right winding around 10 contacts also are the inclined-plane, when the contact of right winding around 10 inserts in left winding around 9 contacts 4 place's square shape supports 12, clamping cylinder 11 actions, drive the contact engagement that the engagement hold-down mechanism makes winding around, guarantee that field of conjugate action contact is good reliable, the brachium 60mm of above-mentioned left winding around, the long 600mm of back of the body bar, the brachium 1650mm of right winding around, long 600 mm of back of the body bar, 8 square shape supports are equipped with at the prong contact place of left side winding around altogether, adopt the engagement of 8 little air cylinder driven engagement hold-down mechanisms altogether, the angle between the coil is 90 degree.
The closed circuit yoke of open-close type by pass the removable yoke 5 of detected workpiece centre " " font and " U " font fixedly yoke 6 form, with transformer ' s type seemingly, " U " font fixedly on the two magnetic posts of yoke 6 respectively around the identical elementary drive coil of the number of turn, detected annular workpieces itself is as secondary coil, after two groups of drive coils are connected totally 50 circles connect excitation supply; The removable yoke of " one " font 5 and " U " font fixedly yoke 6 are built up by siliconized plate, the magnetic flux size is directly proportional with the cross section of yoke, yoke section is long-pending determines to the cross section that according to workpiece ring above-mentioned yoke section is long-pending to be 150 * 150, and " one " font equates with " U " font yoke section; The distance of two magnetic posts of " U " font yoke determines that according to Workpiece length (distance at center is 1400 mm to two magnetic posts of above-mentioned " U " font yoke.
Large-sized annular spare 8 is supported by carrying roller 15, and carrying roller 15 is driven by rotating mechanism, makes the workpiece rotation, and when detecting, the connection terminal of contact winding around 2 links to each other with A, the B of excitation supply respectively; The elementary drive coil terminal of the closed circuit yoke of open-close type connects excitation supply B, C two-phase or A, C two-phase.When the open-close type winding around fed the circumferential magnetization electric current, according to electromagnetic induction principle, (can find with workpiece spindle to consistent defective by Circumferential field at the workpiece generation magnetic line of force along the circumferential direction for this magnetization current; When the elementary drive coil of the closed circuit yoke of open-close type feeds the longitudinal magnetization electric current, according to electromagnetic induction principle, (be that annular workpieces produces induction current along the circumferential direction at secondary winding, (longitudinal magnetic field can be found the defective consistent with the workpiece circumferencial direction to this induction current to the consistent magnetic line of force with workpiece spindle in the workpiece generation; When the elementary drive coil of open-close type winding around and the closed circuit yoke of open-close type leads to phase differential 120 simultaneously, longitudinal magnetic field and Circumferential field stagger the alternating magnetic field superposition of certain angle on workpiece in time phase, its vector is synchronous at surface of the work formation rotating speed and electric current, the elliptical rotating field that the peak value track is relevant with amplitude, workpiece is carried out resultant magnetization, the defective of surface of the work any direction can be detected in this magnetic field, because circumferential magnetization adopts the open-close type winding around, coil is wrapped on the workpiece equably, therefore Circumferential field is evenly distributed, and has overcome traditional strong outer weak phenomenon in the Distribution of Magnetic Field when wearing excellent method magnetization large-sized annular workpiece; Because the closed circuit yoke of open-close type is adopted in longitudinal magnetization, dexterously with the secondary winding of workpiece as closed circuit yoke, can magnetize whole workpiece, therefore longitudinal magnetic field is evenly distributed, when having overcome the coil method magnetization, the workpiece two ends are magnetic pole, can produce demagnetizing field, the workpiece endoporus is magnetizable not, has the shortcoming in the region between the heart and the diaphragm district; Having overcome yoke method can not be to the magnetized shortcoming of whole workpiece.
The utility model is applicable to the detection of all kinds of big shape annulars, dish type or hollow workpiece, in the practical application, the size of contact winding around 2 and the closed circuit yoke of open-close type can be adjusted, material also can adopt other materials, and the angle between the brachium of open-close type winding around, the number of turn, the coil-conductor also can be made up by other; The cross section of open-close type winding around, arm, contact also can adopt other shapes; The cross section of the closed circuit yoke of open-close type, the elementary drive coil number of turn also can be made up by other; Compress the type of attachment that engaging mechanism also can adopt other structures.
Claims (5)
1. large-sized annular spare magnetic powder inspection magnetizing assembly, comprise relatively-movable magnetic powder inspection magnetization holder (1) and magnetic powder inspection magnetization frame (14), it is characterized in that: the two ends at magnetic powder inspection magnetization holder (1) are provided with contact winding around (2), contact winding around (2) is provided with the connection terminal (3) that can be connected with excitation supply, contact winding around (2) is diffusion type to detected large-sized annular spare both ends of the surface, formed by the outside radial many strip conductors line in center, contact winding around (2) is provided with can intermeshing contact (4), and the contact (4) that holder (1) left side contact winding around (2) is magnetized in the hole in piece part that the contact winding around (2) that arranges on magnetic powder inspection magnetization holder (1) right side passes detected large-sized annular spare and magnetic powder inspection is meshed and is connected; Magnetic powder inspection magnetization frame (14) is provided with fixedly yoke (6) of the removable yoke of " one " font (5) and " U " font, the removable yoke of " one " font (5) and " U " font fixedly yoke (6) be wound with drive coil (7), the hole in piece part that the removable yoke of " one " font (5) is passed detected large-sized annular spare and " U " font be yoke (6) the closed circuit yoke of composition that is connected fixedly.
2. large-sized annular spare magnetic powder inspection magnetizing assembly according to claim 1, it is characterized in that: per two adjacent conductor lines compartment of terrains, center of the contact winding around (2) of detected workpiece left side set gradually to connecting and not being connected, per two adjacent conductor lines compartment of terrains, center of the contact winding around (2) of detected workpiece right side are set to not be connected and be connected with the left side successively accordingly, make current path of the whole formation of winding around of two end faces.
3. large-sized annular spare magnetic powder inspection magnetizing assembly according to claim 1, it is characterized in that: contact (4) is by the engagement of little air cylinder driven engagement hold-down mechanism, every group of back and corresponding conductor lines of contact engagement is connected, and the conductor lines of many correspondences forms the current path of a closure.
4. large-sized annular spare magnetic powder inspection magnetizing assembly according to claim 1 is characterized in that: many strip conductors line of contact winding around (2) is more than 3.
5. large-sized annular spare magnetic powder inspection magnetizing assembly according to claim 1, it is characterized in that: employed excitation supply is the AC power with A, B, C three-phase, two terminals of open-close type winding around connect A, B two-phase, and two terminals of the elementary drive coil of the closed circuit yoke of open-close type connect B, C two-phase or A, C two-phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220727442 CN203133025U (en) | 2012-12-26 | 2012-12-26 | Large ring unit magnetic powder inspection magnetization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220727442 CN203133025U (en) | 2012-12-26 | 2012-12-26 | Large ring unit magnetic powder inspection magnetization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203133025U true CN203133025U (en) | 2013-08-14 |
Family
ID=48940997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220727442 Expired - Fee Related CN203133025U (en) | 2012-12-26 | 2012-12-26 | Large ring unit magnetic powder inspection magnetization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203133025U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123335A (en) * | 2012-12-26 | 2013-05-29 | 盐城东车科技有限公司 | Large-size ring unit magnetic powder inspection magnetizer and manufacturing method thereof |
| CN108572219A (en) * | 2018-07-17 | 2018-09-25 | 盐城市电子设备厂有限公司 | Truck transom magnaflux |
-
2012
- 2012-12-26 CN CN 201220727442 patent/CN203133025U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123335A (en) * | 2012-12-26 | 2013-05-29 | 盐城东车科技有限公司 | Large-size ring unit magnetic powder inspection magnetizer and manufacturing method thereof |
| CN108572219A (en) * | 2018-07-17 | 2018-09-25 | 盐城市电子设备厂有限公司 | Truck transom magnaflux |
| CN108572219B (en) * | 2018-07-17 | 2023-10-03 | 盐城市电子设备厂有限公司 | Frame beam magnetic powder inspection machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201518014U (en) | Multifunctional portable magnetic particle defect detector | |
| CN201083697Y (en) | Non-contact type round steel on-line fluorescence magnetic particle flaw detection equipment | |
| CN205845630U (en) | Utilize device and automatic Magnetizing and demagnetizing machine that permanent-magnetic field carries out magnetizing or demagnetizing | |
| CN103123335A (en) | Large-size ring unit magnetic powder inspection magnetizer and manufacturing method thereof | |
| CN101393168B (en) | Magnetic powder inspection apparatus | |
| CN201828544U (en) | Magnetic powder inspection device for sampling wire | |
| CN203133025U (en) | Large ring unit magnetic powder inspection magnetization device | |
| CN103207233B (en) | Magnetizer of large gear ring workpiece magnetic particle flaw detector | |
| CN102854241A (en) | Axial magnetization device suitable for steel pipe short dead zone transverse defect high-speed detection | |
| CN111505112A (en) | Side rolling resistant torsion bar magnetic powder flaw detector for passenger train and flaw detection method | |
| EP3821989B1 (en) | Online automation measurement system for claw-pole overall magnetic property | |
| CN103323521B (en) | A kind of collocation method possessing alternating current-direct current longitudinally closed circuit magnetizing function and defectoscope | |
| CN203148895U (en) | Magnetizing device of magnetic particle flaw detector for big gear ring workpieces | |
| CN101561419B (en) | Thick-wall inner hole magnetic particle inspection magnetizer | |
| CN203148894U (en) | Magnetic-powder flaw-detecting machine of wheel-pair type workpiece | |
| CN206040347U (en) | Device for magnetize or demagnetize with permanent -magnetic field | |
| CN103558480A (en) | High-low voltage detector of commutator | |
| CN201285386Y (en) | Magnetic powder defect detecting magnifying apparatus | |
| CN202748342U (en) | Magnetic particle flaw detector with opening-closing coils having compatible wheel diameters | |
| CN207281004U (en) | Special-shaped coils wheel is to magnetic powder inspection device | |
| CN202994724U (en) | Magnetic particle flaw detector | |
| CN205157752U (en) | Multipolar magnetic ring magnetic flow automatic alignment testing arrangement that magnetizes | |
| CN203587558U (en) | Magnetic powder detection device of circular work-piece | |
| CN211206346U (en) | Continuous nondestructive testing equipment for local defects of superconducting cable | |
| CN201653978U (en) | Yoke composite magnetizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20171226 |