CN2140062Y - Magnet powder flaw detector - Google Patents
Magnet powder flaw detector Download PDFInfo
- Publication number
- CN2140062Y CN2140062Y CN 92219888 CN92219888U CN2140062Y CN 2140062 Y CN2140062 Y CN 2140062Y CN 92219888 CN92219888 CN 92219888 CN 92219888 U CN92219888 U CN 92219888U CN 2140062 Y CN2140062 Y CN 2140062Y
- Authority
- CN
- China
- Prior art keywords
- iron core
- coil
- flaw detector
- triode thyristor
- bidirectional triode
- 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
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model relates to a magnet powder flaw detector used for the non-destructive flaw detection of the ferrous metal. The utility model overcomes the defects that the existing magnet powder flaw detector has bulky structure, low sensitivity and low work efficiency, the existing magnet powder flaw detector isn't suitable for sampling inspection and repeat inspection for subtilis components and installing parts, etc. The magnet powder flaw detector is provided with an unclosed iron core, a coil sheathed on the iron core and an outer casing installed on the outside of the coil. Both ends of the coil are connected with a pulsating power supply by cable lines, and the front end of the iron core is provided with a probe which is exposed on the outside of the outer casing. The utility model can directly carry the magnetic powder to slide and detect on the surface of the detected workpiece, which prevents and reduces the pollution of the magnetic powder. The magnet powder flaw detector is suitable for detected surfaces with various shapes.
Description
The utility model relates to a kind of magnetic powder inspection device that is used for the ferrous metal nondestructive examination.
The magnetic powder inspection utensil of producing both at home and abroad mainly contains fixed and portable two big classes at present.Stationary magnetic particle detector is applicable to the magnetic powder inspection technology of factory mass product, because defectoscope fixed installation, the device structure pattern is fixed, equipment clamping fixture physical dimension is bigger, running parameter is unsuitable for also being difficult to the parts that the surface comes in every shape are detected to tiny parts with in sampling observation, the reinspection of component.The form of portable magnetic powder inspection device is more, is mainly used in the occasion that flows parts are rechecked, and the heaviness that they have is manipulated inconvenience, and the nothing that has is adjusted electric current or do not had the probe modulation schemes, has influenced the detection quality, sensitivity and inefficiency.These magnetic powder inspection utensils generally are earlier magnetic to be sprayed on surface of the work equably in use, and then the energising detection, and the easy like this magnetic that causes pollutes, and the waste magnetic.
The utility model is a kind of magnetic powder inspection device that designs for the shortcoming that overcomes above-mentioned prior art, it is integrated iron core, coil and handle, can change difform probe according to the surface configuration of detected parts, directly take powder slippage on component surface and detect.Give coil power supply by pulsafeeder, sensitivity is adjustable.
Technical solution of the present utility model is, the magnetic powder inspection device, and it has inc iron core 5, be enclosed within the coil 7 on the iron core 5 and be installed in the shell 3,4 of coil 7 outsides.Its special character is that the two ends of coil 7 are connected with pulsafeeder by cable 1, and the front end of iron core 5 is equipped with a probe 6 that is exposed at shell 3,4 outsides.Shell 3,4 is in order to insulate, and available hand is directly held shell 3,4 and detected.Probe 6 is used to carry magnetic and contacts with the surface of detected workpiece.Pulsafeeder is used for producing pulsating field at iron core 5, improves the precision that detects.
Probe 6 of the present utility model is fixed on the shell 3,4 by bolt 9, and the rear end of probe 6 and the front end of iron core 5 are hinged.According to the surface configuration of detected workpiece can outward winding bolt 9 change shapes and surface of the work near or identical probe 6.
The structure of pulsafeeder of the present utility model is, the series circuit that capacitor 12 and resistance 11 are formed, and an end of this series circuit is connected with the A1 of bidirectional triode thyristor 13 end, and the other end is held with the A2 of bidirectional triode thyristor 13 and is connected.The control utmost point G of bidirectional triode thyristor 13 is connected with an end of diac 14, and the other end of diac 14 is connected with a point.One end of capacitor 17 is connected with the A1 of bidirectional triode thyristor 13 end, and the other end of capacitor 17 is connected with a point.One end of keyswitch 8 is connected with a point, and the other end of keyswitch 8 is connected with an end of adjustable resistance 15, and the other end of adjustable resistance 15 is connected with the A2 end of bidirectional triode thyristor 13.Resistance 16 is connected in parallel on the two ends of adjustable resistance 15.The A2 end of bidirectional triode thyristor 13 is connected with an end of AC power, and the other end of AC power is as an output terminal of pulsafeeder, and the A1 of bidirectional triode thyristor 13 end is another output terminal of pulsafeeder.
Probe of the present utility model can directly carry magnetic and detect at the surface sliding of detected workpiece, be applicable to detection at component, the surface of the work that pitch angle with surface level is not more than 60 ° all can detect, do not need in advance magnetic to be spread on the surface of the work, prevent and reduced the magnetic pollution.To different detected surface of the work, the probe that can change correspondingly-shaped detects, and is applied widely.Regulate the adjustable resistance of pulsafeeder, can change the pulsation peak value of pulsating current, regulate the active degree of magnetic on workpiece, improve or satisfy examination criteria.
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
Fig. 1 is a structural representation of the present utility model, and as Figure of abstract.
Fig. 2 is a circuit diagram of the present utility model.
As shown in Figure 1, iron core 5 all uses the silicon steel plate punching out to become definite shape to be overrided to form with probe 6.Iron core 5 is a strip, pegs graft by siliconized plate is staggered in the rear end of the front end of iron core 5 and probe 6, and the contact position, front and back of siliconized plate is a cambered surface.Bolt 9 is hinged with iron core 5 and probe 6, and is fixed on the shell 3,4, and probe 6 can rotate around bolt 9.The siliconized plate of probe 6 compresses with bolt 10.On the insulating frame of coil 7 outside iron core 5.Shell 3,4 is symmetrical two halves, makes with the engineering plastics of insulation.The rear and front end of shell 3,4 has bolt hole, during assembling, with bolt 2 and bolt 9 iron core 5, coil 7 and keyswitch 8 is fixed on the inside.Coil 7 two ends are drawn with pulsafeeder with cable 1 by the cable aperture of shell 3,4 rear ends and are connected.Keyswitch 8 is fixed on the external insulation of field coil, by the insulation that is arranged on shell 3 one sides by key control.As shown in Figure 2, an end of 220V AC power is connected with the A2 of bidirectional triode thyristor 13 end, and the other end of 220V AC power is connected with an end of coil 7, and the other end of coil 7 is connected with the A1 end of bidirectional triode thyristor 13.By the series circuit that capacitor 12 and resistance 11 are formed, its end is connected with the A2 end of bidirectional triode thyristor 13, and its other end is connected with the A1 end of bidirectional triode thyristor 13.The control utmost point G of bidirectional triode thyristor 13 is connected with the triggering output terminal of diac 14, and the other end of diac 14 is connected with a point.One end of capacitor 17 is connected with the A1 of bidirectional triode thyristor 13 end, and the other end is connected with a point.One end of keyswitch 8 is connected with a point, and the other end is connected with an end of adjustable resistance, and the other end of adjustable resistance is connected with the A2 end of bidirectional triode thyristor 13.Resistance 16 is connected in parallel on the two ends of adjustable resistance 15.The series circuit that resistance 11 and capacitor 12 are formed is the holding circuit of bidirectional triode thyristor 13 in the phase shift network, prevents that bidirectional triode thyristor 13 from damaging because of superpotential in perceptual load circuit.Diac 14, adjustable resistance 15, resistance 16 and capacitor 17 are formed the triggering control loop of bidirectional triode thyristor 13.When keyswitch 8 was connected, capacitor 17 began charging, when voltage is elevated to the forward voltage of diac 14, capacitor 17 discharges by the control utmost point G of diac 14 to bidirectional triode thyristor 13, controllable silicon 13 conductings have electric current to pass through in the field coil 7, the trigger circuit short circuit.When alternating voltage zero-crossing, bidirectional triode thyristor 13 turn-offs, and capacitor 17 begins charging again, repeats said process.Adjustable resistance 15 is used to change the charging rate of capacitor 17, increases or reduce conduction angle, and the voltage peak that outputs to field coil 7 two ends is raise or reduction.Resistance 16 is connected in parallel on the two ends of adjustable resistance 15, makes adjustable resistance 15 when minimum value, also can make diac 14 reach the turnover turn-on voltage, realizes continuous, level and smooth voltage adjustment.
During use, at first adjust adjustable resistance 15, make the suitable situation that detects workpiece of field voltage at field coil 7 two ends, hand-held housing 3,4, switch 8 pushes button, field coil 7 have electric current by the time produce pulsating field, directly contact with probe 6 with the magnetic source, carry magnetic slippage on detected surface of the work.Because the magnetic line of force of induction on iron core 56 penetrates in the detected workpiece by popping one's head in, workpiece is magnetized, be regions of strong magnetisation around the workpiece of 6 wipings of popping one's head in this moment, lines of magnetic induction is substantially parallel with workpiece interface.When surface of the work or nearly surperficial defectiveness, the lines of magnetic induction of fault location will be walked around defective, and part lines of magnetic induction effusion surface of the work is walked around the defective workpiece that turns back and formed stray field.Magnetic is attracted by stray field, gathers surface of the work, shows the vestige of magnetic, reaches the purpose of detection.Owing to pulse in magnetic field, it can stir magnetic intensely, helps magnetic and moves on rough surface, has improved detection sensitivity.
Claims (3)
1, magnetic powder inspection device, it has inc iron core 5, be enclosed within the coil 7 on the iron core 5 and be installed in the shell 3,4 of coil 7 outsides, it is characterized in that the two ends of coil 7 are connected with pulsafeeder by cable 1, the front end of iron core 5 is equipped with a probe 6 that is exposed at shell 3,4 outsides.
According to the described magnetic powder inspection device of claim 1, it is characterized in that 2, probe 6 is fixed on the shell 3,4 by bolt 9, the rear end of probe 6 and the front end of iron core 5 are hinged.
3, according to claim 1 or 2 described magnetic powder inspection devices, it is characterized in that, the structure of pulsafeeder is, the series circuit that capacitor 12 and resistance 11 are formed, one end of this series circuit is connected with the A1 of bidirectional triode thyristor 13 end, the other end is connected with the A2 end of bidirectional triode thyristor 13, the control utmost point G of bidirectional triode thyristor 13 is connected with an end of diac 14, the other end of diac 14 is connected with a point, one end of capacitor 17 is connected with the A1 of bidirectional triode thyristor 13 end, the other end of capacitor 17 is connected with a point, one end of keyswitch 8 is connected with a point, the other end of keyswitch 8 is connected with an end of adjustable resistance 15, and the other end of adjustable resistance 15 is connected with the A2 end of bidirectional triode thyristor 13, and resistance 16 is connected in parallel on the two ends of adjustable resistance 15.The A2 end of bidirectional triode thyristor 13 is connected with an end of AC power, and the other end of AC power is as an output terminal of pulsafeeder, and the A1 of bidirectional triode thyristor 13 end is another output terminal of pulsafeeder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92219888 CN2140062Y (en) | 1992-09-26 | 1992-09-26 | Magnet powder flaw detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92219888 CN2140062Y (en) | 1992-09-26 | 1992-09-26 | Magnet powder flaw detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2140062Y true CN2140062Y (en) | 1993-08-11 |
Family
ID=33767041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92219888 Expired - Fee Related CN2140062Y (en) | 1992-09-26 | 1992-09-26 | Magnet powder flaw detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2140062Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520060A (en) * | 2011-12-09 | 2012-06-27 | 武汉理工大学 | Magnetic powder case type nondestructive inspection automatic detecting system |
| CN111766293A (en) * | 2019-04-02 | 2020-10-13 | 中国石油天然气集团有限公司 | Multi-specification continuous pipe defect detection device |
| CN112666247A (en) * | 2020-12-18 | 2021-04-16 | 南京迪威尔高端制造股份有限公司 | Magnetic powder detection device and method for circumferential defects of inner wall and outer wall of ferromagnetic product hole |
| CN116626150A (en) * | 2023-07-24 | 2023-08-22 | 中兴海陆工程有限公司 | Conformal contact magnetic conduction device for magnetic particle inspection machine |
-
1992
- 1992-09-26 CN CN 92219888 patent/CN2140062Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520060A (en) * | 2011-12-09 | 2012-06-27 | 武汉理工大学 | Magnetic powder case type nondestructive inspection automatic detecting system |
| CN102520060B (en) * | 2011-12-09 | 2014-12-03 | 武汉理工大学 | Magnetic powder case type nondestructive inspection automatic detecting system |
| CN111766293A (en) * | 2019-04-02 | 2020-10-13 | 中国石油天然气集团有限公司 | Multi-specification continuous pipe defect detection device |
| CN112666247A (en) * | 2020-12-18 | 2021-04-16 | 南京迪威尔高端制造股份有限公司 | Magnetic powder detection device and method for circumferential defects of inner wall and outer wall of ferromagnetic product hole |
| CN116626150A (en) * | 2023-07-24 | 2023-08-22 | 中兴海陆工程有限公司 | Conformal contact magnetic conduction device for magnetic particle inspection machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |