CN205280660U - Dc magnetization probe based on receiving and dispatching formula coil suitable for omega welding seam - Google Patents
Dc magnetization probe based on receiving and dispatching formula coil suitable for omega welding seam Download PDFInfo
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- CN205280660U CN205280660U CN201520945680.4U CN201520945680U CN205280660U CN 205280660 U CN205280660 U CN 205280660U CN 201520945680 U CN201520945680 U CN 201520945680U CN 205280660 U CN205280660 U CN 205280660U
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- welding seam
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Abstract
The utility model relates to a nuclear power station control rod drive mechanism seals up welding seam electromagnetism nondestructive testing technique field, specifically discloses a dc magnetization probe based on receiving and dispatching formula coil suitable for omega welding seam. This probe detects sensor group including DC magnetic saturation unique tuple, axle around formula bobbin exciting coil and densely covered formula, and DC magnetic saturation unique tuple and axle form " H " type frame construction around formula bobbin exciting coil jointly about, two vertical stratification coillings form DC magnetic saturation unique tuples, jackshaft coiling bobbin exciting coil on to the skeleton forms the axle around formula bobbin exciting coil, the top at omega welding seam detection area welding seam is wholly striden with the axle around formula bobbin exciting coil to the DC magnetic saturation unique tuple to the densely covered formula of installing on omega welding seam detection area welding seam cambered surface region including a plurality of point type sensor detects sensor group. The depth extension that this probe detected is bigger, the reinforcing of quantitative ability to through the densely covered sensor detecting element group of laminating welding seam cambered surface, can improve defect station keeping ability.
Description
Technical field
The utility model belongs to Nuclear power plants rod drive mechanism seal weld electromagnetic nondestructive testing field, is specifically related to a kind of probe of the DC magnetization based on receiving type coil being applicable to omega welding seam.
Background technology
Omega welding seam is the connection seal weld between reactor control rod driving mechanism and reactor lid cup seat, it it is the special seal weld seam of primary Ioops pressure boundary, it is among vibration environment for a long time, inner by the effect of High Temperature High Pressure and corrosive primary Ioops medium (boric acid water), the welding flaw that particularly when shutdown and reactor startup, the change of temperature can impel weld seam inside to exist is expanded, and is the weak link of core one-level parts. Omega welding seam mother metal inner ring is 0Cr18Ni12Mo2Ti, packing material is 0Cr18Ni9Ti, mother metal and weld heat-affected zone are organized as ferrite+austenite, grain fineness number is 6-7 level, seam organization is delta ferrite+austenite, and welded seam area, heat-affected zone and wood zone all have certain weak magnetic.
Omega welding seam is that radius is little, and curvature is big, the semi-circular shape weld seam that wall thickness is thin, the inside and outside surface forming of weld seam poor (weld reinforcement height is uneven). omega welding seam mother metal thickness is 3mm, but welded seam area exists its thickness remaining high generally at about 5mm due to outside surface in weld seam, more than weld seam outside surface height be about 0.5mm, weld width be about 6��7mm, concrete structure is as shown in Figure 1. in this case, outside surface can for transverter well contact surperficial little, bring surface lift-off effect greatly and the problem such as depth of penetration is inadequate to eddy testing. for the eddy current inspection of this kind of special construction weld seam, the design of transverter is quite important, present stage has carried out a lot of research, include and arrange multiple somes formulas in the laminating cambered surface of imitated structure, orthogonal, the structure of the coils such as difference, but what mostly adopt is based on from from the signal excitation received and receiving mode, this kind of pattern has the features such as the simplicity that simplicity of design and coil arrange, but the ground noise due to welded seam area, and the weak magnetic in welded seam area and mother metal region, resolution and detection for signal cause bigger impact, sometimes even it is difficult to detection.
Summary of the invention
The purpose of this utility model is to provide a kind of probe of the DC magnetization based on receiving type coil being applicable to omega welding seam, it can improve welded seam area and the magnetic field homogeneity in parent material region, and eddy current depth of penetration, on the basis meeting surveyed area covering, it is to increase the resolving power of signal and detection sensitivity.
The technical solution of the utility model is as follows: a kind of probe of the DC magnetization based on receiving type coil being applicable to omega welding seam, this probe comprises DC magntic saturation unit group, axle around formula Bobbin drive coil and densely covered formula detecting sensor group, wherein, DC magntic saturation unit group and axle form " H " type skeleton construction jointly around formula Bobbin drive coil, the vertical structure coiling in two, left and right forms DC magntic saturation unit group, tunnel shaft, to coiling Bobbin drive coil on skeleton, forms axle around formula Bobbin drive coil; DC magntic saturation unit group and axle are around the overall top across omega welding seam surveyed area weld seam of formula Bobbin drive coil, and are provided with the densely covered formula detecting sensor group comprising some point sensors on omega welding seam surveyed area weld seam cambered surface region.
In described densely covered formula detecting sensor group, the reasonable solid matter of point sensor of some planar coils is arranged in omega welding seam surveyed area weld seam cambered surface, and ensures, while weld seam area defects signal detection, crosstalk does not occur in field signal each other.
Described DC magntic saturation unit group becomes magnetic core by what be brushed with insullac such as dry silicon steel sheet stack, and the copper wire at its some circle of outer coiling is made.
The described point sensor coil in densely covered formula detecting sensor group is hall sensing device or giant magneto-resistance sensor.
The axle of described axle in formula Bobbin drive coil is around formula structure, and its diameter covers the width of weld seam, and extends to the mother metal district of omega welding seam surveyed area, makes field region cover the whole region that defect may occur.
Unusual effect of the present utility model is: a kind of probe of the DC magnetization based on receiving type coil being applicable to omega welding seam described in the utility model, it can carry out DC magntic saturation by the direct current that DC magntic saturation unit group passes to for welded seam area, direct current to detection actuation signal produce interference and limited, and by changing direct current size and direction, it is possible to effective adjustment magnetic saturation intensity and degaussing saturation; Bobbin excitation and point sensor is utilized to receive, owing to encouraging and receiving separating of unit, if causing existing defects signal like this, and when certain signal to noise ratio, it in contrast to the signal transmission and reception pattern of spontaneous self-bring in type, the angle deviation of signal and background increases, and the resolving power of signal strengthens; The mode encouraged by Bobbin, increase the magnetic flux density of surveyed area, improve the intensity of field region defect signal, the nargin of range of frequency is regulated to increase in addition, make detection depth range can be bigger, quantitation capabilities strengthens, and the sensor groups of sensor elements gathered by laminating weld seam cambered surface, defect location ability can be improved.
Accompanying drawing explanation
Fig. 1 is a kind of DC magnetization sonde configuration schematic diagram based on receiving type coil being applicable to omega welding seam described in the utility model;
In figure: 1, DC magntic saturation unit group; 2, axle is around formula Bobbin drive coil; 3, densely covered formula detecting sensor group; 4, omega welding seam surveyed area.
Embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
As shown in Figure 1, a kind of probe of the DC magnetization based on receiving type coil being applicable to omega welding seam, comprise DC magntic saturation unit group 1, axle around formula Bobbin drive coil 2 and densely covered formula detecting sensor group 3, wherein, DC magntic saturation unit group 1 and axle form " H " type skeleton construction jointly around formula Bobbin drive coil 2, two, left and right is vertical is brushed with the magnetic core become such as dry silicon steel sheet stack of insullac, in the copper wire formation DC magntic saturation unit group 1 of its outer some circle of coiling solid matter; Coiling Bobbin drive coil on axial skeleton parallel in " H " type skeleton construction, forms axle around formula Bobbin drive coil 2; DC magntic saturation unit group 1 and axle are around formula Bobbin drive coil 2, the overall top across omega welding seam surveyed area 4 weld seam, and axle covers the width of weld seam around formula Bobbin drive coil 2 axis around its diameter of formula structure, and extend to mother metal district, make field region cover the whole region that defect may occur; Being provided with densely covered formula detecting sensor group 3 in the cambered surface of omega welding seam surveyed area 4 welded seam area, formula detecting sensor group 3 of gathering comprises some point sensor coils, it is possible to be hall sensing device or giant magneto-resistance sensor; Some point sensors of planar coil are adopted to carry out reasonable solid matter along omega welding seam surveyed area 4 weld seam cambered surface, to ensure, while weld seam area defects signal detection, crosstalk does not occur in field signal each other.
Claims (5)
1. one kind is applicable to the probe of the DC magnetization based on receiving type coil of omega welding seam, it is characterized in that: this probe comprises DC magntic saturation unit group (1), axle is around formula Bobbin drive coil (2) and densely covered formula detecting sensor group (3), wherein, DC magntic saturation unit group (1) and axle form " H " type skeleton construction jointly around formula Bobbin drive coil (2), the vertical structure coiling in two, left and right forms DC magntic saturation unit group (1), tunnel shaft is to coiling Bobbin drive coil on skeleton, form axle around formula Bobbin drive coil (2), DC magntic saturation unit group (1) and axle are around the overall top across omega welding seam surveyed area (4) weld seam of formula Bobbin drive coil (2), and are provided with densely covered formula detecting sensor group (3) comprising some point sensors on omega welding seam surveyed area (4) weld seam cambered surface region.
2. a kind of probe of the DC magnetization based on receiving type coil being applicable to omega welding seam according to claim 1, it is characterized in that: in described densely covered formula detecting sensor group (3), the reasonable solid matter of point sensor of some planar coils is arranged in omega welding seam surveyed area (4) weld seam cambered surface, and ensure, while weld seam area defects signal detection, crosstalk does not occur in field signal each other.
3. a kind of probe of the DC magnetization based on receiving type coil being applicable to omega welding seam according to claim 1, it is characterized in that: described DC magntic saturation unit group (1) becomes magnetic core by what be brushed with insullac such as dry silicon steel sheet stack, and the copper wire at its some circle of outer coiling is made.
4. a kind of probe of the DC magnetization based on receiving type coil being applicable to omega welding seam according to claim 1 and 2, it is characterised in that: the described point sensor coil in densely covered formula detecting sensor group (3) is hall sensing device or giant magneto-resistance sensor.
5. a kind of probe of the DC magnetization based on receiving type coil being applicable to omega welding seam according to claim 1, it is characterized in that: the axle of described axle in formula Bobbin drive coil is around formula structure, its diameter covers the width of weld seam, and extend to the mother metal district of omega welding seam surveyed area (4), make field region cover the whole region that defect may occur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520945680.4U CN205280660U (en) | 2015-11-24 | 2015-11-24 | Dc magnetization probe based on receiving and dispatching formula coil suitable for omega welding seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520945680.4U CN205280660U (en) | 2015-11-24 | 2015-11-24 | Dc magnetization probe based on receiving and dispatching formula coil suitable for omega welding seam |
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| Publication Number | Publication Date |
|---|---|
| CN205280660U true CN205280660U (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520945680.4U Withdrawn - After Issue CN205280660U (en) | 2015-11-24 | 2015-11-24 | Dc magnetization probe based on receiving and dispatching formula coil suitable for omega welding seam |
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| CN (1) | CN205280660U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770632A (en) * | 2015-11-24 | 2017-05-31 | 核动力运行研究所 | A kind of probe of the dc magnetization based on receiving type coil suitable for omega welding seam |
| CN106770624A (en) * | 2016-12-29 | 2017-05-31 | 核动力运行研究所 | A kind of AC magnetic field probe checked suitable for welded seam area |
| CN107167516A (en) * | 2017-05-24 | 2017-09-15 | 昆明理工大学 | Double difference dynamic formula pulse eddy current probe unit, array probe and detection means |
-
2015
- 2015-11-24 CN CN201520945680.4U patent/CN205280660U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770632A (en) * | 2015-11-24 | 2017-05-31 | 核动力运行研究所 | A kind of probe of the dc magnetization based on receiving type coil suitable for omega welding seam |
| CN106770624A (en) * | 2016-12-29 | 2017-05-31 | 核动力运行研究所 | A kind of AC magnetic field probe checked suitable for welded seam area |
| CN107167516A (en) * | 2017-05-24 | 2017-09-15 | 昆明理工大学 | Double difference dynamic formula pulse eddy current probe unit, array probe and detection means |
| CN107167516B (en) * | 2017-05-24 | 2023-09-26 | 昆明理工大学 | Double differential pulse eddy current probe unit, array probe and detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160601 Effective date of abandoning: 20230616 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20160601 Effective date of abandoning: 20230616 |