CN2575674Y - Signal amplitude converter - Google Patents
Signal amplitude converter Download PDFInfo
- Publication number
- CN2575674Y CN2575674Y CN 02284005 CN02284005U CN2575674Y CN 2575674 Y CN2575674 Y CN 2575674Y CN 02284005 CN02284005 CN 02284005 CN 02284005 U CN02284005 U CN 02284005U CN 2575674 Y CN2575674 Y CN 2575674Y
- Authority
- CN
- China
- Prior art keywords
- magnetic
- detection probe
- detection
- detecting
- magnetizing apparatus
- 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
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model relates to a defect detection device for the end of a magnetic-conductive member, which belongs to a detection device, particularly a device which detects the defect of the magnetic-conductive member by using a magnetic leakage detecting principle. The utility model is used for quickly and accurately detecting the defect of the magnetic-conductive member and solving the end blind area problem when the magnetic-conductive member is detected by a conventional magnetic leakage method. The utility model comprises a detecting part and a signal processing part, wherein, two magnetic poles of a magnetizer of the detecting part, a detecting probe and an auxiliary guide rod are positioned on one shaft line; the detecting probe is two-stage pressing structure which is split along a circumferential direction, one stage pressing structure comprises a shell, a pressing spring and a pressing block, and the second stage pressing structure comprises a torsion spring, a probe body, a hall element on the end of the probe body and a magnetic gathering sheet; the signal processing part comprises a preprocessor, a signal processor, a display and a controller. The device increases the auxiliary guide rod to solve the end blind area problem in detection, and has the advantages of high precision and high efficiency. The utility model has wide application prospect in the detection of members, such as oil pipes, oil pumping pipes, drilling rods, steel rods, etc.
Description
Technical field
The utility model belongs to checkout equipment, particularly uses the device that the Magnetic Flux Leakage Inspecting principle detects the conducting magnetic component defective.
Background technology
In the detection to conducting magnetic components such as sucker rod, drilling rod, oil pipe, rod irons, it is that an emphasis also is a difficult point that its end is detected.In the use of member, the end is the position that connects between member, and stressed complexity is easy to generate defectives such as crackle, burn into wearing and tearing most.The main detection method of utilization is still magnetic detection method (seeing " sucker rod pumping equipment and technology " 1994.10.P395-396 of petroleum industry publishing house such as Wu Zezhong, Li Jingwen, Zhao Xuesheng) at present.Magnetic detection method and Magnetic Flux Leakage Inspecting method all belong to the magnetic detection method, all are to utilize the stray field of fault location to detect after workpiece is magnetized.But the former adsorbs the magnetic (dry magnetic particle or magnetic flaw detection ink) that adds by stray field to pile up at fault location, and the testing staff judges defective with naked eyes.The latter utilizes magnet-sensitive element to pick up magnetic leakage signal, carries out Treatment Analysis then.The device of using Magnetic Flux Leakage Inspecting conducting magnetic component defective comprises test section and signal processing, magnetizing apparatus two magnetic poles of test section and detection probe by the support member support on an axis, detection probe is between magnetizing apparatus the two poles of the earth, signal processing is handled the magnetic leakage signal that detection probe obtains, comprise signals collecting and pretreater, signal processor, display and controller, see Jin Jianhua, Kang Yihua, Wang Junfeng, Yang Shuzi. " online detection by quantitative principle of defect of sucker rod and instrument ". oil field equipment, 1999.28 (3), P17～20.The Magnetic Flux Leakage Inspecting method has plurality of advantages such as pinpoint accuracy, high detection efficient, high anti-jamming capacity, safety easy to use.But flux-leakage detection method is not used for detecting the end defective of conducting magnetic component as yet, this is owing to easily spread in magnetic field when the end is magnetized, and the shape of end is special, realizes mechanism's complexity, be difficult for realizing that robotization detects, so general difficult point and the blind area that all end is considered as detecting.
Summary of the invention
The utility model proposes a kind of conducting magnetic component end defect detecting device, use the Magnetic Flux Leakage Inspecting principle, be used for the conducting magnetic component end, the for example detection of position defectives such as sucker rod zone of transition, drilling rod termination, oil pipe tube head, rod iron termination, to detect the end defective quickly and accurately, the end blind zone problem when solving conventional leakage method and detecting conducting magnetic component.
A kind of conducting magnetic component of the present utility model end defect detecting device, comprise test section and signal processing, magnetizing apparatus two magnetic poles of test section and detection probe by supports support on an axis, detection probe is between magnetizing apparatus the two poles of the earth, signal processing comprises signals collecting and pretreater, signal processor, display and controller, it is characterized in that: (1) test section also comprises secondary guide and scan driving mechanism, and secondary guide is with high magnetic conduction material
Material is made, its sectional area is more than or equal to tested member end face sectional area, is positioned at magnetizing apparatus two
On same the axis of magnetic pole and detection probe, its shaft contacts with magnetizing apparatus one utmost point;
(2) scan driving mechanism joint detection probe or secondary guide, tested member;
(3) magnetizing apparatus is repeatedly put by 2～50 pairs of magnet steel and is constituted, its axially effective active length L and tested structure
Part end length L to be checked ' pass is L 〉=4L '.
Described conducting magnetic component end defect detecting device, described detection probe can be the two-stage compressing structure of circumferential subdivision, first order compressing structure entad comprises housing, stage clip, briquetting successively by outer rim, and stage clip elasticity connects housing and contacts with the housing inner slide with briquetting, the briquetting outside; Second level compressing structure comprises the torsion spring that is movably connected in the briquetting side, Hall element and the poly-magnetic sheet of surveying body and being contained in its end.
Described conducting magnetic component end defect detecting device, it is further characterized in that the Hall element of described detection end of body places between two poly-magnetic sheets or is embedded among the poly-magnetic sheet, poly-magnetic sheet is made by high permeability material.
Described conducting magnetic component end defect detecting device, scan driving mechanism can adopt carries out cylinder, straight line cylinder, electric pushrod or stepper motor.
When tested member is sent to device, contact with secondary guide, secondary guide is close to the end face of tested member, by magnetizing apparatus tested component ends and secondary guide is magnetized simultaneously.Magnetizing apparatus adopts permanent magnetic steel as the excitation magnetic source, can select magnet steel to make tested component ends reach magnetic saturation or nearly state of saturation according to the difference of tested member cross-sectional area.Be not to be that with the difference of the mode of magnetization in the past a certain part to the end magnetizes, but tested end integral body magnetized by magnetic circuit.The key that forms magnetic circuit is to have increased secondary guide makes tested member and secondary guide constitute magnetic conductor jointly, and to the Magnetic Flux Leakage Inspecting method, this way all has greatly improved to the optimization of magnetic leakage signal and to the inhibition of ground unrest.Computing machine signals and controls the Magnetic Flux Leakage Inspecting probe, and probe is compressed and self-centering; Scan driving mechanism begins to move realizes relative motion between detection probe and the tested component ends, the signals collecting pretreater amplifies, signal is converted into digital signal after the processing such as filtering the signal that probe collects, carry out analyzing and processing by the Computer signal disposal system again, show then and print.
Scan driving mechanism of the present utility model, to different detected members, because bigger difference between its size, size and the weight, employed scan driving mechanism can be different.For the thin lighter member of sucker rod, thin rod iron and so on, often adopt general implementation cylinder or electric pushrod to promote the relative motion that tested member is realized detection probe and tested member.But then adopt drive detection probe such as straight line cylinder or stepper motor to scan tested member for thick heavier member such as drilling rod, oil pipe and finish detection.
The utility model utilization Magnetic Flux Leakage Inspecting principle and method, accuracy of detection height, antijamming capability are strong, and labor intensity of operating staff is low; Increase secondary guide and make that magnetizing apparatus can be with tested end Overall magnetization, thereby solve end blind zone problem when conducting magnetic component detected; Two-stage compresses Magnetic Flux Leakage Inspecting probe and can adapt to automatically and self-centering along with the variation of the variation of tested scantling, shape and component ends size, the equipment that makes can be used in the member of different size, small investment, and can suppress Diameter Gradual Change, radially rock, unfavorable factor such as radial vibration is to the influence of detection signal; The detection probe scan mode is flexible, can suitably select according to the difference of tested member; The testing result clear display is accurate, the erroneous judgement that reduces a staff.The utility model has been filled up the blank with blind area, leakage method detection means end defective, has broad application prospects in the detection of conducting magnetic components such as oil pipe, sucker rod, drilling rod, rod iron.
Description of drawings
Fig. 1 pick-up unit totally constitutes synoptic diagram;
Fig. 2 Magnetic Flux Leakage Inspecting probe synoptic diagram;
Fig. 3 end face is circular or the circumferential subdivision structural representation of oval-shaped member detection probe;
The poly-magnetic sheet installation site of Fig. 4 synoptic diagram;
Fig. 5 sucker rod zone of transition defective synoptic diagram;
The flaw indication that this device of Fig. 6 is obtained when being applied to sucker rod zone of transition defects detection shown in Figure 5.
Embodiment
As shown in Figure 1, whole device mainly is made up of secondary guide (1), magnetizing apparatus (2), detection probe (7), signals collecting and pretreater (8), signal processor (9), controller (10), scan driving mechanism (13) and display (11) printer (12) and necessary support (3), (4), (6).(3) are used for supporting scan driving mechanism (13) among Fig. 1, and (4) are used for supporting total system, and are with expansion bolt that whole device is on the ground fastening, and (6) are used for supporting detection probe (7).Magnetizing apparatus (2) is made up of excitation source and armature, adopts permanent magnetic steel as the excitation magnetic source, and the crossbeam in the use device is as magnetic conduction armature, they is magnetized forming magnetic circuit when contacting with guide rod (1) and tested member (5).Can select 2～50 pairs of magnet steel to make tested component ends reach magnetic saturation or nearly state of saturation according to the difference of tested member (5) cross-sectional area.
Fig. 2 and shown in Figure 3, detection probe (7) two-stage compresses and self-centering apparatus, adopts circumferential subdivision structure, to circular end surface subdivision up and down, and selects 2～4 unsteady detecting units for use, and (22) are first subdivision body among the figure, and (21) are second subdivision body; Also can adopt subdivision structure up and down to ellipse, circumferentially the subdivision structure can allow tested member can put into easily and take out easily from detection probe.(14) be probing shell, stage clip (15) one ends connect housing (14) other end and are connected with briquetting (16).(15), (16) constitute the unsteady compressing structure of the first order together, along tested member circumferential arrangement, can be along with the difference of tested member (5) size be floated, and after probe closes up, remain with member with one heart, member can be compressed to reduce the interference such as shake that scanning probe causes.(17) for compressing torsion spring, (18) for surveying body, (17), (18) constitute second level floating structure together, link together with first order floating structure, along tested member circumferential arrangement, 1～8 detecting element (Hall element) (20) and 2～16 poly-magnetic sheets (19) are mounted thereto, can do the unsteady and adjustment of further adaptability with respect to first order floating installation.Poly-magnetic sheet (19) is made by high permeability material, is placed on the both sides of Hall element, or Hall element is embedded in wherein, as shown in Figure 4.
Figure 5 shows that an on-the-spot sucker rod zone of transition defective synoptic diagram that detects, defective (23) is a deep mixed groove around zone of transition, can't discern under greasy dirt.Adopt the utility model device that it is detected the gained signal as shown in Figure 6, wherein (24), (25), (27) signal amplitude are bigger, for probe covers the defect detection signal that exists on the position, the corresponding defect characteristic of (26) institute is identical with three places, front, and just the degree of depth is slightly little.
Claims (4)
1. conducting magnetic component end defect detecting device, comprise test section and signal processing, magnetizing apparatus two magnetic poles of test section and detection probe by supports support on an axis, detection probe is between magnetizing apparatus the two poles of the earth, signal processing comprises signals collecting and pretreater, signal processor, display and controller, it is characterized in that:
(1) test section also comprises secondary guide and scan driving mechanism, and secondary guide is with high
Permeability magnetic material is made, its sectional area is more than or equal to tested member end face sectional area,
Be positioned on same the axis of magnetizing apparatus two magnetic poles and detection probe, its shaft with
Magnetizing apparatus one utmost point contacts;
(2) scan driving mechanism joint detection probe or secondary guide, tested member;
(3) magnetizing apparatus is repeatedly put by 2～50 pairs of magnet steel and is constituted, its axially effective active length L
With tested component ends length L to be checked ' pass is L 〉=4L '.
2. conducting magnetic component as claimed in claim 1 end defect detecting device, it is characterized in that described detection probe is the two-stage compressing structure of circumferential subdivision, first order compressing structure entad comprises housing, stage clip, briquetting successively by outer rim, and stage clip elasticity connects housing and contacts with the housing inner slide with briquetting, the briquetting outside; Second level compressing structure comprises the torsion spring that is movably connected in the briquetting side, Hall element and the poly-magnetic sheet of surveying body and being contained in its end.
3. conducting magnetic component as claimed in claim 2 end defect detecting device, the Hall element that it is characterized in that described detection end of body place between two poly-magnetic sheets or are embedded among the poly-magnetic sheet, and poly-magnetic sheet is made by high permeability material.
4. as claim 1,2 or 3 described conducting magnetic component end defect detecting devices, it is characterized in that scan driving mechanism adopts implementation cylinder, straight line cylinder, electric pushrod or stepper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02284005 CN2575674Y (en) | 2002-11-01 | 2002-11-01 | Signal amplitude converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02284005 CN2575674Y (en) | 2002-11-01 | 2002-11-01 | Signal amplitude converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2575674Y true CN2575674Y (en) | 2003-09-24 |
Family
ID=33745468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02284005 Expired - Fee Related CN2575674Y (en) | 2002-11-01 | 2002-11-01 | Signal amplitude converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2575674Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081046A (en) * | 2009-11-30 | 2011-06-01 | 北京中科三环高技术股份有限公司 | Device and method for automatically detecting appearance of magnetic sheet |
| CN103454339A (en) * | 2013-08-14 | 2013-12-18 | 洛阳泰斯特探伤技术有限公司 | Self-excited shield full magnetic information inductive detecting device |
| CN103837594A (en) * | 2014-02-28 | 2014-06-04 | 南京航空航天大学 | Magnetic flux leakage detecting device for steel pipe and detection method thereof |
-
2002
- 2002-11-01 CN CN 02284005 patent/CN2575674Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081046A (en) * | 2009-11-30 | 2011-06-01 | 北京中科三环高技术股份有限公司 | Device and method for automatically detecting appearance of magnetic sheet |
| CN103454339A (en) * | 2013-08-14 | 2013-12-18 | 洛阳泰斯特探伤技术有限公司 | Self-excited shield full magnetic information inductive detecting device |
| CN103454339B (en) * | 2013-08-14 | 2015-10-28 | 洛阳泰斯特探伤技术有限公司 | A kind of autoexcitation shields full magnetic information induction sniffer |
| CN103837594A (en) * | 2014-02-28 | 2014-06-04 | 南京航空航天大学 | Magnetic flux leakage detecting device for steel pipe and detection method thereof |
| CN103837594B (en) * | 2014-02-28 | 2017-01-11 | 南京航空航天大学 | Magnetic flux leakage detecting device for steel pipe and detection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11099156B2 (en) | Method and device for detecting and evaluating defect | |
| CN2411484Y (en) | Corrosion defect detection device for underground on-service long distance pipeline | |
| CN103353479B (en) | The detection method that a kind of electromagnetic acoustic longitudinal wave guide is compound with Magnetic Flux Leakage Inspecting | |
| CN101498686B (en) | Thread magnetism detector for drilling tool | |
| CN1828219A (en) | Intelligent detector for submarine pipeline | |
| CN1924568A (en) | Resonance eddy detection method for surface crack | |
| CN103412038B (en) | The portable ACFM detector of a kind of Based PC/104 embedded system | |
| CN104698074A (en) | Wall-climbing device for magnetic leakage detection on wall defects of storage tank and measurement method | |
| CN1289907C (en) | Magnectic-conductive member end-part defect detection device | |
| CN106274977A (en) | The direct current Magnetic Flux Leakage Testing System of a kind of trigger-type drainage pattern and method thereof | |
| CN103645243A (en) | Electromagnetic nondestructive detection system of power transmission line | |
| CN107167514A (en) | A kind of Novel steel wire rope the cannot-harm-detection device and detection method | |
| CN103048379A (en) | Device and method for recognizing damage to bridge stay cable | |
| CN101718748A (en) | Magnetic memory method and device for diagnosing ferromagnetic component damage | |
| CN105181789A (en) | Detection device for internal defect of small-pipe-diameter continuous oil pipe based on triaxial magnetic flux leakage detection | |
| CN105067701B (en) | Pulsed eddy current testing hardware separation method based on rectangular probe | |
| CN2729723Y (en) | Instrument bottom of storage tank driven by DC motor for detecting leakage of magnet | |
| CN101887048A (en) | Barkhausen detection system and method under condition of high-speed operations | |
| CN101281166A (en) | Method and apparatus for permanent magnetism destabilization nondestructive detection | |
| CN112881513A (en) | Method for detecting pipeline defects by combining magnetic leakage and electromagnetic ultrasonic waves | |
| CN114113307A (en) | Omnidirectional defect detection device and method for coiled tubing | |
| CN104833720A (en) | Method for single-coil electromagnetic resonance detection of metal pipeline damage | |
| CN2575674Y (en) | Signal amplitude converter | |
| CN2754100Y (en) | Multifunctional electromagnetic detecting instrument | |
| CN108037178A (en) | A kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array |
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 |