CN209727844U - A kind of metal defect detection sensor - Google Patents
A kind of metal defect detection sensor Download PDFInfo
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- CN209727844U CN209727844U CN201920449954.9U CN201920449954U CN209727844U CN 209727844 U CN209727844 U CN 209727844U CN 201920449954 U CN201920449954 U CN 201920449954U CN 209727844 U CN209727844 U CN 209727844U
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Abstract
The utility model discloses a kind of metal defect detection sensor.The metal defect detection sensor includes: outer housing, excitation module, magnetic shielding cover and detection coil array；Excitation module, magnetic shielding cover and detection coil array are respectively positioned in outer housing；Magnetic shielding cover covers on outside detection coil array, and excitation module is located at outside magnetic shielding cover；The bottom of magnetic shielding cover, the both ends of excitation module and detection coil array are each attached to the bottom of outer housing；Detection coil array includes multiple detection coil groups, and multiple detection coil groups are equidistantly arranged in parallel；Each detection coil group includes two detection coils, and two detection coils of each detection coil group are connected by conducting wire, and two arranged in parallel and pole orientations of detection of each detection coil group are identical.The metal defect detection sensor of the utility model, can be improved detection efficiency.
Description
Technical field
The utility model relates to metal defect detection fields, more particularly to a kind of metal defect detection sensor.
Background technique
The pressure-bearings class special equipment such as boiler, pressure vessel and piping has potential leakage and explosion hazard, often holds
By high temperature, high pressure, low temperature, inflammable, explosive, toxic or corrosive medium comprehensive function, once failure, leakage or quick-fried occurs
Fried, often the catastrophic failures such as concurrent fire, poisoning, environmental pollution, radioactive pollution, will seriously affect people's lives and properties peace
Entirely, national economy operation and social stability.That studies during special equipment field " 13 " is to the effect that based on risk
Safeguard technology and bearing device long-term operation safeguards technique.In order to long-term operation, online fortune is effectively reduced
Capable risk must just study targetedly lossless detection method, especially adapt to the advanced lossless detection method of site environment
It seems very necessary.Ferromagnetic metallic material is largely used as the stress members of bearing device to use, in use, metal material
Material corrosion thinning is the major security risk of pressure-bearing class special equipment, therefore is quickly detected to it and early diagnosis has
Important meaning.
In the defects detection of the pressure-bearings class special equipment such as current boiler, pressure vessel and piping, Magnetic testing, ultrasound
Detection, ray detection consider that electromechanical detection method has it using relatively broad, but from detection efficiency, detection sensitivity etc.
Unique advantage.Traditional electromagnetic detection sensor generally uses single coil to carry out scanning, and detection efficiency is lower, easily causes
The phenomenon that missing inspection.
Utility model content
The purpose of the utility model is to provide a kind of metal defect detection sensors, improve detection efficiency.
To achieve the above object, the utility model provides following scheme:
A kind of metal defect detection sensor, comprising: outer housing, excitation module, magnetic shielding cover and detection coil array；
The excitation module, the magnetic shielding cover and the detection coil array are respectively positioned in the outer housing；The magnetic
Shielding case covers on outside the detection coil array, and the excitation module is located at outside the magnetic shielding cover；The bottom of the magnetic shielding cover
Portion, the both ends of the excitation module and the detection coil array are each attached to the bottom of the outer housing；
The detection coil array includes multiple detection coil groups, and multiple detection coil groups are equidistantly arranged in parallel；
Each detection coil group includes two detection coils, and two detection coils of each detection coil group pass through conducting wire string
Connection, detection coil is arranged in parallel and pole orientation is identical by two of each detection coil group.
Optionally, the shape of the excitation module is arc-shaped.
Optionally, the excitation module includes excitation magnetic yoke and excitation coil；The excitation magnetic yoke be it is arc-shaped, it is described swash
The both ends of excitation yoke are fixed on the bottom of the outer housing；The excitation coil is uniformly around in the excitation magnetic yoke.
Optionally, the material of the excitation magnetic yoke is soft magnetic materials.
Optionally, the bottom of the outside of the outer housing is provided with idler wheel, the idler wheel is used to drive institute by rolling
State outer housing movement.
Optionally, assist device is provided at the top of the outside of the outer housing, the assist device is for being described
Outer housing provides thrust forward or backward.
Optionally, pigtail splice is installed on the side wall of the outer housing；The pigtail splice and the excitation coil
Both ends and each detection coil group conducting wire both ends connection, for be the excitation module and each inspection
Test coil group provides power interface.
Optionally, the bottom inside the outer housing is provided with adhesive layer；The adhesive layer is used for the excitation magnetic
The both ends of yoke, the bottom of the magnetic shielding cover and the detection coil array are fixed on the bottom of the outer housing.
Optionally, the bottom outside the outer housing is provided with wearing layer；The wearing layer is for avoiding the shell
Friction between the bottom of body and metal to be detected.
Optionally, the magnetic property of the magnetic shielding cover is higher than the magnetic property of the excitation magnetic yoke.
According to specific embodiment provided by the utility model, the utility model discloses following technical effects: this is practical new
Metal defect detection sensor disclosed in type uses multiple detection coil groups, and each detection coil group includes two detection lines
Circle, to improve the area coverage of detection range, improves detection efficiency.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without any creative labor, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structure drawing of device of the utility model metal defect detection sensor embodiment；
Fig. 2 is the structure of the detection coil group of the utility model the utility model metal defect detection sensor embodiment
Figure.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
Fig. 1 is the structure drawing of device of the utility model metal defect detection sensor embodiment.
Referring to Fig. 1, the metal defect detection sensor, comprising: outer housing 9, excitation module, magnetic shielding cover 5 and detection line
Enclose array.
The excitation module, the magnetic shielding cover 5 and the detection coil array are respectively positioned in the outer housing 9；It is described
Magnetic shielding cover 5 covers on outside the detection coil array, and the excitation module is located at outside the magnetic shielding cover 5；The magnetic shielding cover 5
Bottom, the excitation module both ends and the detection coil array be each attached to the bottom of the outer housing 9.It is described to swash
The input signal for encouraging module is low frequency signal.
The detection coil array includes multiple detection coil groups, and each detection coil group constitutes a sense channel.It is more
A detection coil group is equidistantly arranged in parallel；Each detection coil group includes two detection coils, each inspection
Two detection coils of test coil group by conducting wire connect, two detection coils of each detection coil group it is arranged in parallel and
Pole orientation is identical.Constitute it is arranged in parallel between multiple detection coils of multiple detection coil groups, and in each detection coil group
Current direction it is consistent with the current direction in other detection coil groups.
Each detection coil includes detection magnetic core and detection conducting wire；The detection conducting wire is wound on the detection magnetic core
On, two detection coils of the same detection coil group share the same detection conducting wire.
The shape of the excitation module is arc-shaped.Plane and horizontal plane where the excitation module.
The excitation module includes excitation magnetic yoke 2 and excitation coil 1；The excitation magnetic yoke 2 is arc-shaped, the excitation magnetic
The both ends of yoke 2 are fixed on the bottom of the outer housing 9；The excitation coil 1 is uniformly around in the excitation magnetic yoke 2.
The material of the excitation magnetic yoke 2 is soft magnetic materials.
The excitation module generates current vortex after powered up, and current vortex is coupled with metal to be detected generation, is then detected by
Coil array detects, so that it is determined that corrosion of metal degree to be detected.
The bottom of the outside of the outer housing 9 is provided with idler wheel 11, the idler wheel 11 is used for by rolling described in drive
Outer housing 9 moves.The idler wheel can guarantee the distance between the detection coil array and metal to be detected in preset range
It is interior, a wide range of quick inspection to metal to be detected can be realized without carrying out grinding process to metallic surface to be detected
It surveys.
Assist device 10 is provided at the top of the outside of the outer housing 9, the assist device 10 is used to be described outer
Shell 9 provides thrust forward or backward.The stationarity of signal acquisition process can be improved in the cooperation idler wheel of assist device 10.
Pigtail splice 6 is installed on the side wall of the outer housing 9；The pigtail splice 6 and the two of the excitation coil 1
The both ends connection of the conducting wire of end and each detection coil group, for being the excitation module and each detection line
Circle group provides power interface.As a kind of specific embodiment, pigtail splice 6 is 19 core circle pigtail splices, detection coil group
Quantity is 8.Each detection coil group draws 16 in two terminals (totally 16 terminals) and 19 core circle pigtail splices
A core connection.Two terminals that the excitation module is drawn are connect with two cores in remaining 3 cores, one remaining
Core is spare core.
Bottom inside the outer housing 9 is provided with adhesive layer 7；The adhesive layer 7 is used for the excitation magnetic yoke 2
Both ends, the bottom of the magnetic shielding cover 5 and the detection coil array are fixed on the bottom of the outer housing 9.
Bottom outside the outer housing 9 is provided with wearing layer 8；The wearing layer 8 is for avoiding the outer housing 9
Friction between bottom and metal to be detected.
The material of the magnetic shielding cover 5 is magnetic conductive material.The magnetic property of the magnetic shielding cover 5 is higher than the excitation magnetic yoke
2 magnetic property.
Fig. 2 is the structure of the detection coil group of the utility model the utility model metal defect detection sensor embodiment
Figure.
Referring to fig. 2, each detection coil group includes two detection coils.The connection that two detection coils are just being connect using series connection
Mode.I.e. two detection coils use opposite direction of winding, and are put into magnetic core in two detection coils respectively, then by two
A unidirectional end of detection coil is connected with conducting wire.Such as Fig. 2 gives a kind of specific connection type, two detection coils
Upper end connected with conducting wire, the lower end of two detection coils uses conducting wire to draw respectively, and the conducting wire of extraction is connected to 19 cores
Round pigtail splice.If side a and b is respectively electric current input and output side in Fig. 2, according to right-hand screw rule it is found that two
The upper end of a detection coil is the pole N, and lower end is the pole S.
The metal defect detection sensor of the utility model can generate following technical effect:
The utility model is used as excitation magnetic yoke using circular arc type magnetic core, compared to U-shaped magnetic core, with the direct coupling of metal to be detected
The effect of conjunction is more preferable；It is to be checked after with metal direct-coupling to be detected when the material selection Hard Magnetic material of the magnetic yoke of excitation module
Surveying in metal can have that remanent magnetism is excessive, therefore the material selection soft magnetic materials of the magnetic yoke of the utility model excitation module,
After with metal direct-coupling to be detected, remanent magnetism is small in metal to be detected, will not generate remanent magnetism it is excessive to subsequent using bring
It influences；The utility model is detected using multiple detection coil groups, and detection area coverage is big, and detection efficiency is high, can be effective
Avoid missing inspection；The utility model is detected by assist device and idler wheel cooperation, lower to the working condition requirement of metal surface to be detected,
Influence of the operating condition to detection signal because of metal surface is reduced significantly, is effectively increased signal-to-noise ratio, is made flaw detection sensitivity
It greatly improves；The driving frequency that the utility model uses is low frequency signal, available metal surface to be detected and internal detection
Signal, compared to high-frequency excitation signal, penetration depth is greatly increased；The sensor of the utility model is to ferrimagnet (CRMO
Steel, carbon steel), nonferromugnetic material (stainless steel) can be detected, more complete compared to conventional electromagnetic detection technique test object
Face.
Specific case used herein is expounded the principles of the present invention and embodiment, above embodiments
Explanation be merely used to help understand the method and its core concept of the utility model；Meanwhile for the general technology of this field
Personnel, based on the idea of the present invention, there will be changes in the specific implementation manner and application range.In conclusion
The content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. a kind of metal defect detection sensor characterized by comprising outer housing, excitation module, magnetic shielding cover and detection line
Enclose array；
The excitation module, the magnetic shielding cover and the detection coil array are respectively positioned in the outer housing；The magnetic screen
It covers on outside the detection coil array, the excitation module is located at outside the magnetic shielding cover；The bottom of the magnetic shielding cover, institute
The both ends and the detection coil array of stating excitation module are each attached to the bottom of the outer housing；
The detection coil array includes multiple detection coil groups, and multiple detection coil groups are equidistantly arranged in parallel；Each
The detection coil group includes two detection coils, and two detection coils of each detection coil group are connected by conducting wire,
Detection coil is arranged in parallel and pole orientation is identical by two of each detection coil group.
2. metal defect detection sensor according to claim 1, which is characterized in that the shape of the excitation module is circle
Arc.
3. metal defect detection sensor according to claim 2, which is characterized in that the excitation module includes excitation magnetic
Yoke and excitation coil；The excitation magnetic yoke be it is arc-shaped, the both ends of the excitation magnetic yoke are fixed on the bottom of the outer housing；Institute
Excitation coil is stated uniformly around in the excitation magnetic yoke.
4. metal defect detection sensor according to claim 3, which is characterized in that the material of the excitation magnetic yoke is soft
Magnetic material.
5. metal defect detection sensor according to claim 1, which is characterized in that at the bottom of the outside of the outer housing
Portion is provided with idler wheel, and the idler wheel is used to drive the outer housing movement by rolling.
6. metal defect detection sensor according to claim 5, which is characterized in that on the top of the outside of the outer housing
Portion is provided with assist device, and the assist device is used to provide thrust forward or backward for the outer housing.
7. metal defect detection sensor according to claim 3, which is characterized in that pacify on the side wall of the outer housing
Equipped with pigtail splice；The two of the conducting wire at the both ends and each detection coil group of the pigtail splice and the excitation coil
End connection, for providing power interface for the excitation module and each detection coil group.
8. metal defect detection sensor according to claim 3, which is characterized in that the bottom inside the outer housing
It is provided with adhesive layer；The adhesive layer is used for the both ends of the excitation magnetic yoke, the bottom of the magnetic shielding cover and the inspection
Test coil array is fixed on the bottom of the outer housing.
9. metal defect detection sensor according to claim 1, which is characterized in that the bottom outside the outer housing
It is provided with wearing layer；The wearing layer is used to avoid the friction between the bottom of the outer housing and metal to be detected.
10. metal defect detection sensor according to claim 3, which is characterized in that the magnetic conductivity of the magnetic shielding cover
The magnetic property of the excitation magnetic yoke can be higher than.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920449954.9U CN209727844U (en) | 2019-04-04 | 2019-04-04 | A kind of metal defect detection sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920449954.9U CN209727844U (en) | 2019-04-04 | 2019-04-04 | A kind of metal defect detection sensor |
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| CN209727844U true CN209727844U (en) | 2019-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946371A (en) * | 2019-04-04 | 2019-06-28 | 中国特种设备检测研究院 | A kind of metal defect detection sensor |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946371A (en) * | 2019-04-04 | 2019-06-28 | 中国特种设备检测研究院 | A kind of metal defect detection sensor |
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