CN1184934A - Device for nondestructive detecting flaws on conductor ball surface - Google Patents
Device for nondestructive detecting flaws on conductor ball surface Download PDFInfo
- Publication number
- CN1184934A CN1184934A CN97120292A CN97120292A CN1184934A CN 1184934 A CN1184934 A CN 1184934A CN 97120292 A CN97120292 A CN 97120292A CN 97120292 A CN97120292 A CN 97120292A CN 1184934 A CN1184934 A CN 1184934A
- Authority
- CN
- China
- Prior art keywords
- coil
- ball
- eddy current
- supporter
- conducting sphere
- 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.)
- Granted
Links
- 239000004020 conductor Substances 0.000 title description 5
- 239000000523 sample Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 4
- 230000004044 response Effects 0.000 abstract description 3
- 230000001066 destructive effect Effects 0.000 abstract 1
- 230000002950 deficient Effects 0.000 description 9
- 241001270131 Agaricus moelleri Species 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000009659 non-destructive testing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000700608 Sagitta Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
A non-destructive detecting device for flaws of conductive ball surface defect is composed of coil, eddy current testing head and supporter, the coil is wound on a round stand, the supporter is set in the coil, the conductive body to be tested is put on the supporter, the eddy current testing head is set above the conductive ball. When AC is sent to the coil a magnetic field is produced, in the cavity of round stand and to make the conductive ball rotating, finally, when equilibrium is reached, the flaw part comes to be up, so that the flow ball can be examined out by the eddy current testing head. This device is simple in structure, small in volume, sensitive in response and high in reliability.
Description
The present invention relates to the cannot-harm-detection device of a kind of conducting sphere surface imperfection, relate in particular to the damaged ball selecting device of high temperature gas cooled reactor fuel handling system, belong to technical field of nondestructive testing.
At present, in the damaged ball selecting device of pebble bed high temperature reactor, normally adopt the mechanical means sorting.Its method is, is processed with helicla flute at columniform cylinder surface, and cylinder becomes a pitch angle with horizontal line, settles a length straight fixed bar parallel with cylinder axis in a side of cylinder, and the distance between helicla flute bottom surface and the straight-bar surface is exactly a detector gap.Ball is between helicla flute and straight-bar, and along with the rotation of cylinder, under friction force and action of gravity, rotation edge, ball limit the helicla flute reach, and constantly changes axis of rotation orientation.Every almost can both contact with helicla flute bottom surface and straight-bar surface on the sphere, when the size of damaged ball will fall during less than detector gap, reaches sorting purposes.Intact ball still continues reach.In order to increase defective face and groove bottom and the chance that the bar surface contacts, reduce loss, the longer the better for helicla flute length.This characteristics with the damaged ball of mechanical means sorting are the ball of suitable sorting large-size defective (for example flat-top defective), its anti-external interference ability is strong, its weak point is that device volume is big, heavy, and is difficult to the damaged ball of little defectives such as sorting crack, depression.The sorting unit of this kind mechanical means is in the 88-89 page or leaf narration of document " high temperature gas cooled reactor " (high literary composition is write, and the Atomic Energy Press publishes November nineteen eighty-two).
The objective of the invention is at above-mentioned weak point, a kind of defect inspection method is provided, utilize electromagnetic field principle and mechanics principle, the conducting sphere surface imperfection is moved to the top or the bottom of spheroid rapidly, utilize fixed eddy current sensor to detect damaged ball then by moving.The ball equal energy fast detecting of this method to having defectives such as flat-top, crack, depression, its apparatus structure is simple, volume is little, response is sensitive, reliability is high.
The cannot-harm-detection device of a kind of conducting sphere surface imperfection of the present invention's design, it is made up of coil, eddy current probe and supporter.Coil is wrapped on the coil brace, and detected conducting sphere places coil, and detected conducting sphere places on the supporter, and eddy current probe places the conducting sphere top.
The cannot-harm-detection device of the conducting sphere surface imperfection of the present invention's design has following advantage:
1, can promptly navigate to the surface imperfection of conducting sphere the top or the bottom of ball.
2, can realize noncontact, harmless, detection automatically with the electromagnetic field eddy current method.
3, pick-up unit is simple in structure, volume is little, response is sensitive, reliability is high.
4, the present invention also extends in the production of industrial sector steel ball except that being used for pebble bed high temperature reactor, for example is used for the Non-Destructive Testing of bearing steel ball.
Description of drawings:
Fig. 1 is the structural representation of the pick-up unit that designs of the present invention.
Fig. 2-Fig. 4 is the defective synoptic diagram of conducting sphere among the use embodiment of pick-up unit of the present invention.
Below in conjunction with accompanying drawing, introduce in detail content of the present invention. Among Fig. 1, the 1st, detected conducting sphere, 2 Coil, the 3rd, circular coil support, the 4th, supporter, the 5th, eddy current probe.
Its course of work is: conducting sphere 1 is placed on the supporter 4, the outside vertical of conducting sphere 1 twine Around the coil 2 that can produce rotating excitation field, coil 2 is fixed on the circular soft magnetic materials support. At conducting sphere Directly over, fixed placement one eddy current probe 5, the probe 5 and ball 1 between a gap is arranged. Work as coil Behind the 2 connection sinusoidal alternating power supplys, in the cavity of circular support, just there is rotating excitation field to produce, thereby makes conductor The ball rotation. Spheroid 1 final balance and stability state will make blemish move to the top of ball 1. Defective is fixed After the position, the putting type eddy current probe 5 that recycling is fixed on the defective top just can detect damaged ball.
Embodiment:
The segment of the present invention's design falls into the cannot-harm-detection device, and coil 2 is selected copper conductor for use, support 3 material selection siliconized plates.Conducting sphere 1 is a graphite material, and the diameter of ball is 39.8mm, and eddy current probe 5 adopts the putting type coil, and its magnetic core is selected the soft magnetic material of high magnetic permeability for use.After coil 2 energized, the speed that produced in the cylindrical cavity is 25 revolutions per seconds rotating magnetic field.The present invention chooses three kinds of typical damaged balls and has done test experience, is described below respectively:
The crack ball.Fig. 2 is the synoptic diagram of crack ball, and the degree of depth h=5.9mm in crack stitches wide a=1.1mm, and the symmetrical plane in crack passes through the centre of sphere.Behind the coil switch power, randomly the crack ball is placed on the supporter, process is no more than 5 seconds time, and the crack just moves to the upper area of ball, just can finish damaged ball fast by eddy current testing device then and detect.
The flat-top ball.Fig. 3 is the synoptic diagram of flat-top ball, segment sagitta b=4.6mm.The flat-top ball is placed on the supporter, and then stone-dead if sagittal plane and supporting body surface overlap, this moment, defective was positioned at the lower area of ball, met positioning requirements; Except that this position, regardless of the initial position of spherical interior surface, through the motion that is no more than 4 seconds, segment all can move to the upper area of ball.After the defect location, eddy current testing device just can be finished detection rapidly.
The depression ball.Fig. 4 is the synoptic diagram of depression ball, the dark c=8.8mm that caves in, θ=50 °.Place the depression ball randomly, the result or the depression of motion are positioned at upper area, or depression is positioned at lower area, does not have other position.After the defect location, eddy current testing device just can be finished detection rapidly.
The conducting sphere that utilizes pick-up unit of the present invention to detect can all be made up of conductive material, and also only skin is formed by insulating material for the conductive material kernel.Eddy current probe can be a putting type, also can be through mode.Its probe coil form both can be an absolute type, also can be differential type.
Claims (1)
1, the cannot-harm-detection device of a kind of conducting sphere surface imperfection is characterized in that this device is made up of coil, eddy current probe and supporter; Described coil is wrapped on the coil brace, and detected conducting sphere places coil, and detected conducting sphere places on the supporter, and eddy current probe places the conducting sphere top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97120292 CN1075631C (en) | 1997-11-14 | 1997-11-14 | Device for nondestructive detecting flaws on conductor ball surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97120292 CN1075631C (en) | 1997-11-14 | 1997-11-14 | Device for nondestructive detecting flaws on conductor ball surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1184934A true CN1184934A (en) | 1998-06-17 |
| CN1075631C CN1075631C (en) | 2001-11-28 |
Family
ID=5175877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97120292 Expired - Fee Related CN1075631C (en) | 1997-11-14 | 1997-11-14 | Device for nondestructive detecting flaws on conductor ball surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1075631C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101040182B (en) * | 2004-10-28 | 2010-09-08 | 东洋钢钣株式会社 | Device and method for inspecting scratch on external case for cell |
| CN111707328A (en) * | 2020-06-10 | 2020-09-25 | 清华大学 | Mutual coupling type ball passing detection sensor and detection method thereof |
| CN112684000A (en) * | 2021-01-15 | 2021-04-20 | 中国工程物理研究院激光聚变研究中心 | Eddy current detection device suitable for ball-type subassembly |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231267B (en) * | 2008-01-31 | 2010-12-22 | 华南理工大学 | Polyphase eddy detection system |
-
1997
- 1997-11-14 CN CN 97120292 patent/CN1075631C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101040182B (en) * | 2004-10-28 | 2010-09-08 | 东洋钢钣株式会社 | Device and method for inspecting scratch on external case for cell |
| CN111707328A (en) * | 2020-06-10 | 2020-09-25 | 清华大学 | Mutual coupling type ball passing detection sensor and detection method thereof |
| CN112684000A (en) * | 2021-01-15 | 2021-04-20 | 中国工程物理研究院激光聚变研究中心 | Eddy current detection device suitable for ball-type subassembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1075631C (en) | 2001-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10031107B2 (en) | Method for non-destructive testing of electrically conductive test components employing eddy current probe and rotating magnet to perform partial saturation eddy current test | |
| CN103499404B (en) | Ferromagnetic component alterante stress measurement mechanism and measuring method thereof | |
| CA2548938C (en) | Apparatus and method for detection of defects using flux leakage techniques | |
| CN202083672U (en) | Field quantum detection-based leakage magnetic probe | |
| US20120306483A1 (en) | Electromagnet inspection apparatus and method | |
| CN1220048C (en) | Method for detecting fault of steel-ball surface | |
| CN101419191B (en) | Portable drill rod magnetic memory detector | |
| CN1075631C (en) | Device for nondestructive detecting flaws on conductor ball surface | |
| JPH01123143A (en) | Method and apparatus for detection of flaw by eddy current | |
| CN110076093A (en) | A kind of VCM motor full-automatic detector | |
| CN206009261U (en) | Hardness and crackle on-line checking machine | |
| WO2006046578A1 (en) | Device and method for inspecting scratch on cell external case | |
| Papaelias et al. | High-speed inspection of rolling contact fatigue in rails using ACFM sensors | |
| CN110376094A (en) | A kind of bundled scrap specific weight measurer and measurement method | |
| CN201311410Y (en) | Portable drill rod magnetic memory detector | |
| CN208583660U (en) | Lossless hardness balance detection and failure detector on a kind of needle bearing assembly line | |
| Förster | Sensitive eddy-current testing of tubes for defects on the inner and outer surfaces | |
| JPH0641938B2 (en) | Nondestructive measurement method for zirconium alloy materials | |
| Yue et al. | Eddy current testing device for detecting pipeline defects based on the principle of differential excitation | |
| CN108543722A (en) | A kind of lossless hardness balance detection on needle bearing assembly line and failure detector | |
| JP2008032682A (en) | Method and apparatus for inspecting rolling device component | |
| Zoughi et al. | Real-time and on-line near-field microwave inspection of surface defects in rolled steel | |
| JP2008170408A (en) | Method and device for inspecting nonmetallic inclusion in component of rolling apparatus | |
| CN105806932A (en) | Crack signal-distinguishing eddy current detection sensor and manufacturing method thereof | |
| CN208269819U (en) | A kind of bearing inner race track groove measurement device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |