CN202372477U - Large valve body magnetic powder inspection machine - Google Patents
Large valve body magnetic powder inspection machine Download PDFInfo
- Publication number
- CN202372477U CN202372477U CN2011204437917U CN201120443791U CN202372477U CN 202372477 U CN202372477 U CN 202372477U CN 2011204437917 U CN2011204437917 U CN 2011204437917U CN 201120443791 U CN201120443791 U CN 201120443791U CN 202372477 U CN202372477 U CN 202372477U
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- valve body
- large valve
- transformer
- magnetization
- circumferential
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Abstract
The utility model relates to a large valve body magnetic powder inspection machine, which is used for detecting the crack or the damage of a large valve body. The magnetic powder inspection machine comprises two electromagnetic systems which enable the large valve body to simultaneously obtain a longitudinal magnetic field and a circumferential magnetic field, a method that a group of alternating current and another group of alternating current are subjected to a simultaneous cross magnetization is obtained, a method of circumferential or longitudinal alternating current in one magnetization is performed, or an alternating current-direct current change-over switch of an air cylinder is closed to change into another method of circumferential or longitudinal direct current in another magnetization, magnetic fields of various types are generated with shifting of the switch, the directions of the magnetic fields are constantly changed on a workpiece to form changed effective magnetic fields, a multidirectional resultant magnetization method is achieved, and finally a composite ultra-low frequency demagnetization is utilized. According to the large valve body magnetic powder inspection machine, one-time lifting automatic detection is achieved, a positive and negative rotation observation is achieved, the operation is simple and convenient, the work efficiency is improved, the labor intensity of workers is reduced, and the omission ratio is greatly lowered.
Description
Technical field
The utility model relates to the large valve body magnaflux in fields such as a kind of large valve body failure detector, particularly oil field, nuclear power plant, boats and ships.
Background technology
After the ferrimagnet workpiece is magnetized; When there is defective in workpiece; Cause the discontinuous of magnetizing field, make the magnetic line of force on surface of the work and nearly surface local distortion take place and produce stray field, absorption is applied to the magnetic of surface of the work; Under suitable illumination, form visual visible magnetic trace, thereby show position, size, shape and the order of severity of workpiece, defect.Magnaflux is a kind of non-destructive detecting device of making based on above principle.The home and abroad has the large valve body and similar checkout equipment now, the effective magnetic field that magnetizes that generally adopts the power supply of interchange or direct current list kind to produce, and surperficial skin effect is poor; It is low that inwall detects the sensitivity of manual spray; Usable range is narrow, the lifting observation is dangerous, and the one man operation is inconvenient, observes easy omission etc.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of large valve body magnaflux is provided.The utility model shows that depth of penetration surpasses technical requirement, moves back once with alternating current after bracketing method direct current (ultralow frequency) demagnetization again, and demagnetization effectiveness is less than 0.2mT, and once lifting detects automatically, and positive and negative rotation is observed, and is easy and simple to handle, and class's output improves twice.
The utility model is to realize through following technical scheme; The large valve body magnaflux that the utility model relates to comprises PIC control system, Equipment Inspection performance autoalarm, automatic spray equipment, circumferential magnetization system, axial magnetized system, one group of d-c transformer of one group of AC transformer; AC transformer, d-c transformer connect circumferential magnetization system, longitudinal magnetization system respectively, and perhaps AC transformer, d-c transformer difference connection lengthwise are to magnetizing system, circumferential magnetization system; AC transformer and d-c transformer magnetize respectively, the ultralow frequency demagnetization.
Preferably, said large valve body magnaflux also comprises two groups of AC-DC conversion switch.
Preferably, the compound ultralow frequency demagnetization of AC-DC conversion.
The beneficial effect of the utility model is following: the large valve body magnaflux of the utility model comprises that PIC control system, Equipment Inspection performance autoalarm, automatic spray equipment, circumferential magnetization system, axial magnetized system, one group of d-c transformer of one group of AC transformer magnetize simultaneously, also comprise an AC-DC conversion switch.One group of interchange is magnetized method simultaneously with another group direct current (three phase full wave rectification); Vertical during a kind of magnetization; Circumferentially exchange; Or close AC-DC conversion switch; Circumferential when changing another kind of the magnetization into; Vertical direct current; Order produces difformity (Cheng Yuan in time; Ellipse or spiral) magnetic field; The direction in magnetic field constantly changes on workpiece and forms the effective magnetic field that changes; Realize multi-direction magnetization method; In; Outer wall is automatic spray simultaneously; Use GB B respectively; E type test block checkout equipment system sensitivity; Show that depth of penetration surpasses specification requirement, move back once with alternating current again after interior extrapolation method direct current (ultralow frequency) demagnetization that demagnetization effectiveness is less than 0.2mT; Once lifting detects automatically; Positive and negative rotation is observed, and is easy and simple to handle, and class's output improves twice.
Description of drawings
Fig. 1 is that vertical, circumferential AC system large valve body magnaflux excitation supply connects schematic diagram.
Fig. 2 is that circumferential, vertical single flow large valve body magnaflux excitation supply connects schematic diagram.
Fig. 3 connects schematic diagram for alternating current-direct current constantly exchanges large valve body magnaflux excitation supply.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing.
Embodiment
The large valve body magnaflux of present embodiment comprises PIC control system, Equipment Inspection performance autoalarm, automatic spray equipment, circumferential magnetization system, longitudinal magnetization system, one group of d-c transformer of one group of AC transformer; AC transformer, d-c transformer connect circumferential magnetization system, longitudinal magnetization system respectively, and perhaps AC transformer, d-c transformer difference coupling shaft are to magnetizing system, circumferential magnetization system; AC transformer and d-c transformer magnetize simultaneously, vertically exchange during magnetization, circumferential direct current.Preferably, said large valve body magnaflux also comprises an AC-DC conversion switch.Preferably, AC-DC conversion switch is an air-cylinder type.
Further, the real work principle of large valve body magnaflux is set forth as follows: defectoscope has two groups of magnetizing systems, makes large valve body obtain the effective magnetizing of longitudinal magnetic field and Circumferential field simultaneously; Magnetizable body is divided into two groups, and one group to be that valve body is vertical wear excellent induced magnetization, and another group is worn the rod induction for horizontal valve body; Valve body leans on the travelling car operation; Excitation supply switches automatically, and switching is a kind of special big current contact, utilizes cylinder to carry out AC-DC conversion.Wearing rod utilizes siliconized plate and copper coin folder system to form circumferential magnetization: excitation supply directly is connected on the copper coin of electrode, and conduction produces induction current on the copper coin; (valve body is circular hole; Valve body just is equivalent to a circle coil like this), produce Circumferential field on the valve body, detect defective longitudinally; Longitudinal magnetization: the magnetizing coil of wearing on the rod produces magnetic field to coil electricity, through wearing excellent siliconized plate with the generation longitudinal magnetic field of magnetic field induction to valve body, detects circumferential defective.When work, open simultaneously like this; Utilize the phase differential of incoming power to form different magnetic field, on workpiece, form the rotating magnetic field that constantly changes, reach the purpose of resultant magnetization; For the certain depth equipment that detects workpiece, defect has adopted the three-phase full-wave dc magnetization; But on workpiece, produced certain direct current remanent magnetism, equipment can reach standard for detecting back remanent magnetism, and equipment has adopted the method for three-phase full-wave ultralow frequency communicating DC demagnetization.
Like Fig. 1, shown in Figure 2, this excitation supply mainly is made up of AC transformer 1, d-c transformer 2, left plug 3, right plug 4, last plug 5, following plug 6, yoke coil 7-10.Among Fig. 1: AC transformer 1 connects with left plug 3, right plug 4, yoke coil 7, yoke coil 8; D-c transformer 2 is with last plug 5, plug 6, yoke coil 9, yoke coil 10 connect down, forms vertically, the excitation supply of circumferential direct current mode.Among Fig. 2: AC transformer 1 is with last plug 5, plug 6, yoke coil 9, yoke coil 10 connect down; D-c transformer 2 connects with left plug 3, right plug 4, yoke coil 7, yoke coil 8, forms vertically, the circumferential excitation supply of exchange way.Among Fig. 3: two groups of AC-DC conversion switch 11, can realize that by Fig. 1 to Fig. 2, Fig. 2 is to Fig. 1 translation function; Vertically exchange during magnetization, circumferentially direct current, or shifter cylinder 11 AC-DC conversion switch, circumferentially exchange when changing another kind of magnetization into, vertical direct current; Twice magnetization produces the magnetic field of difformity (Cheng Yuan, ellipse or spiral) at interval, and the direction in magnetic field constantly changes on workpiece and forms the effective magnetic field that changes, and realizes multi-direction magnetization method; Inside and outside wall is automatic spray simultaneously, uses GB B, E type test block checkout equipment system sensitivity respectively, shows that depth of penetration surpasses technical requirement; Move back once with alternating current after bracketing method direct current (ultralow frequency) demagnetization, demagnetization effectiveness is less than 0.2mT again, and once lifting detects automatically; Positive and negative rotation is observed, and is easy and simple to handle, and class's output improves twice.
Claims (3)
1. a large valve body magnaflux is characterized in that, comprises PIC control system, Equipment Inspection performance autoalarm, automatic spray equipment, circumferential magnetization system, axial magnetized system, one group of d-c transformer of one group of AC transformer; AC transformer, d-c transformer connect circumferential magnetization system, longitudinal magnetization system respectively, and perhaps AC transformer, d-c transformer difference connection lengthwise are to magnetizing system, circumferential magnetization system; AC transformer and d-c transformer magnetize respectively, the ultralow frequency demagnetization.
2. large valve body magnaflux according to claim 1 is characterized in that, said large valve body magnaflux also comprises two groups of AC-DC conversion switch.
3. large valve body magnaflux according to claim 1 and 2 is characterized in that, the compound ultralow frequency demagnetization of AC-DC conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204437917U CN202372477U (en) | 2011-11-10 | 2011-11-10 | Large valve body magnetic powder inspection machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204437917U CN202372477U (en) | 2011-11-10 | 2011-11-10 | Large valve body magnetic powder inspection machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202372477U true CN202372477U (en) | 2012-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204437917U Expired - Fee Related CN202372477U (en) | 2011-11-10 | 2011-11-10 | Large valve body magnetic powder inspection machine |
Country Status (1)
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| CN (1) | CN202372477U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076389A (en) * | 2012-12-25 | 2013-05-01 | 河北省电力公司电力科学研究院 | Magnetic powder detection method for large cast valve |
| CN103743812A (en) * | 2014-01-20 | 2014-04-23 | 爱德森（厦门）电子有限公司 | Design method for improving magnetic powder inspection capacity through simultaneous excitation at plurality of frequencies |
| CN110398535A (en) * | 2019-08-13 | 2019-11-01 | 玉环市大众铜业制造有限公司 | A kind of valve body detection method in valve production process |
| CN110455912A (en) * | 2019-08-30 | 2019-11-15 | 玉环市大众铜业制造有限公司 | A method of for detecting valve body surface dent |
| CN110455911A (en) * | 2019-08-27 | 2019-11-15 | 玉环市大众铜业制造有限公司 | A kind of valve body defect-detecting equipment |
-
2011
- 2011-11-10 CN CN2011204437917U patent/CN202372477U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076389A (en) * | 2012-12-25 | 2013-05-01 | 河北省电力公司电力科学研究院 | Magnetic powder detection method for large cast valve |
| CN103076389B (en) * | 2012-12-25 | 2016-03-16 | 河北省电力公司电力科学研究院 | Massive casting valve magnetic powder detection method |
| CN103743812A (en) * | 2014-01-20 | 2014-04-23 | 爱德森（厦门）电子有限公司 | Design method for improving magnetic powder inspection capacity through simultaneous excitation at plurality of frequencies |
| CN103743812B (en) * | 2014-01-20 | 2016-08-24 | 爱德森（厦门）电子有限公司 | A kind of method for designing using multiple frequency excitation simultaneously to improve magnetic powder inspection capacity |
| CN110398535A (en) * | 2019-08-13 | 2019-11-01 | 玉环市大众铜业制造有限公司 | A kind of valve body detection method in valve production process |
| CN110455911A (en) * | 2019-08-27 | 2019-11-15 | 玉环市大众铜业制造有限公司 | A kind of valve body defect-detecting equipment |
| CN110455911B (en) * | 2019-08-27 | 2020-11-24 | 玉环市大众铜业制造有限公司 | Valve body flaw detection equipment |
| CN110455912A (en) * | 2019-08-30 | 2019-11-15 | 玉环市大众铜业制造有限公司 | A method of for detecting valve body surface dent |
| CN110455912B (en) * | 2019-08-30 | 2023-07-11 | 广东省铭鸿通风设备有限公司 | Method for detecting surface dent of valve body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20131110 |