CN207636538U - A kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array - Google Patents
A kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array Download PDFInfo
- Publication number
- CN207636538U CN207636538U CN201721874941.3U CN201721874941U CN207636538U CN 207636538 U CN207636538 U CN 207636538U CN 201721874941 U CN201721874941 U CN 201721874941U CN 207636538 U CN207636538 U CN 207636538U
- Authority
- CN
- China
- Prior art keywords
- low frequency
- frequency electromagnetic
- masking layer
- array
- pieces
- 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.)
- Active
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model discloses a kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array, and the low frequency electromagnetic sensor array includes pigtail splice, sensor housing and is arranged in the sensor shell body and is fixed on the array coil set of pieces of sensor housing bottom, the first magnetic masking layer, electromagnet；Wherein, the outside of the array coil set of pieces is equipped with first magnetic masking layer, electromagnet successively；The pigtail splice is arranged in the outside of the sensor housing, and is electrically connected with the array coil set of pieces.Array coil set of pieces, the first magnetic masking layer, electromagnet is arranged by the bottom in sensor shell body with low frequency electromagnetic sensor array in the utility model Metal pipeline corrosion defects detection, the polishing cleaning on mechanical scanning probe and tested surface can be without the use of, the quick measurement of wide area can be realized, and defectoscopy precision and spatial resolution can be improved.
Description
Technical field
The utility model is related to pipeline inspection technology field, more particularly to a kind of Metal pipeline corrosion defects detection with low
Frequency electromagnetic array sensor.
Background technology
Stress metal pipeline is a kind of pressure-bearing class special equipment, and working environment is sufficiently complex, often subjects high temperature, height
Pressure, low temperature, inflammable and explosive, toxic or corrosive medium comprehensive function have potential leakage and explosion hazard.Its stress structure
Part generally uses the nonferromugnetic materials such as ferromagnetism or stainless steel, and metal material is in use, stress, medium and temperature
Deng operation operating mode under can caused by material corrosion, wash away be thinned and cracking equivalent damage, therefore to live metallic conduit without into
It is used for quickly detecting in the case of the polishing cleaning of row surface significant with efficient diagnosis.In the main damage pattern of metallic conduit
In research, it is one of the main damage mode for influencing bearing device long period safe operation that material corrosion, which is thinned,.Therefore, corrode
Detection is that one in pressure pipeline detection predominantly detects means and pressure pipeline carries out REASON ANALYSIS ON WELDING SEAM and service life
One the key technical indexes of assessment.
In current pipeline corrosion default detection, the detection methods such as Magnetic testing, ray detection, ultrasound detection are wide
General application, but consider from detection sensitivity, equipment cost, detection efficiency, accuracy of detection etc., low frequency electromagnetic detection side
Method has its detection efficiency height, the advantages such as live ancillary works is few, and testing cost is low.But for the detection of pipeline corrosion default
Problem, traditional electromagnetic detection sensor mostly use greatly unicoil, can only single-point scanning, to larger area carry out all standing inspection
Survey is then very time-consuming and laborious, and is easy to that detection leakage phenomenon occurs.
Utility model content
The purpose of this utility model is to provide a kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array, can
Realize the quick measurement of wide area.
To achieve the above object, the utility model provides following scheme：
A kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array, the low frequency electromagnetic sensor array packet
Include pigtail splice, sensor housing and the array lines for being arranged in the sensor shell body and being fixed on sensor housing bottom
Enclose set of pieces, the first magnetic masking layer, electromagnet；
Wherein, the outside of the array coil set of pieces is equipped with first magnetic masking layer, electromagnet successively；The lead
Connector is arranged in the outside of the sensor housing, and is electrically connected with the array coil set of pieces.
Optionally, the array coil set of pieces includes equal 2n coil being connect with the pigtail splice, each line
The bottom that two row n rows are evenly spaced in the sensor housing is enclosed into, two coils in every a line form an acquisition channel,
For acquiring differential signal, n is the integer more than 0.
Optionally, the low frequency electromagnetic sensor array further includes：
Second magnetic masking layer is fixed on the bottom of the sensor housing, and is arranged in first magnetic masking layer and electricity
Between magnet, and cover first magnetic masking layer.
Optionally, the low frequency electromagnetic sensor array further includes：
Adhesive layer is arranged in the bottom of the sensor housing, and the array coil group is provided on the adhesive layer
Element, the bottom for the array coil set of pieces to be fixed on to the sensor housing.
Optionally, the low frequency electromagnetic sensor array further includes：
Wearing layer is arranged in the bottom of the sensor housing, and the array coil group is provided on the wearing layer
Element, the first magnetic masking layer, electromagnet.
Optionally, the electromagnet includes excitation coil and magnetic core, and the both ends of the magnetic core are fixed on the sensor shell
The bottom of body, and the excitation coil is on the magnetic core.
Optionally, the shape of the magnetic core is arc.
Optionally, the material of first magnetic masking layer and/or the second magnetic masking layer is ferromagnetic material.
Optionally, the magnetic conductivity of first magnetic masking layer and/or the second magnetic masking layer is less than the magnetic conductance of the electromagnet
Rate.
According to specific embodiment provided by the utility model, the utility model discloses following technique effects：
The utility model Metal pipeline corrosion defects detection is passed through with low frequency electromagnetic sensor array in sensor shell body
Bottom setting array coil set of pieces, the first magnetic masking layer, electromagnet, mechanical scanning probe and checklist can be without the use of
The polishing in face is cleared up, you can is realized the quick measurement of wide area, and can be improved defectoscopy precision and spatial discrimination
Rate.
Description of the drawings
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 having to pay creative labor, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is that the structure of the utility model embodiment Metal pipeline corrosion defects detection low frequency electromagnetic sensor array is shown
It is intended to；
Fig. 2 is the layout viewing of array coil set of pieces.
Symbol description：
Sensor housing -1, pigtail splice -2, excitation coil -3, magnetic core -4, the second magnetic masking layer -5, the first magnetic
Shielded layer -6, array coil set of pieces -7, wearing layer -8.
Specific implementation mode
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
The every other embodiment obtained, shall fall within the protection scope of the present invention.
The purpose of this utility model is to provide a kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array, leads to
Array coil set of pieces, the first magnetic masking layer, electromagnet is arranged in the bottom crossed in sensor shell body, can be without the use of mechanical
The polishing on scanning probe and tested surface is cleared up, you can is realized the quick measurement of wide area, and can be improved defect survey
Accuracy of measurement and spatial resolution.
Wherein, low frequency refers to：For ferrimagnet (such as carbon steel), frequency is no more than 30HZ；For nonferromagnetic material
Expect (such as 304 stainless steels), frequency is no more than 1000HZ.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, below in conjunction with the accompanying drawings and have
Body embodiment is described in further detail the utility model.
As shown in Figure 1, the utility model Metal pipeline corrosion defects detection low frequency electromagnetic sensor array includes lead
Connector 2, sensor housing 1 and be arranged in the sensor housing 1 and be fixed on the sensor housing 1 bottom battle array
Alignment circle set of pieces 7, the first magnetic masking layer 6, electromagnet.
Wherein, the outside of the array coil set of pieces 7 is equipped with first magnetic masking layer 6, electromagnet successively；It is described to draw
Wire terminal 2 is arranged in the outside of the sensor housing 1, and is electrically connected with the array coil set of pieces 7.
First magnetic masking layer 6, electromagnet, array coil set of pieces 7 maintain an equal level with the bottom of the sensor housing.
Preferably, the utility model Metal pipeline corrosion defects detection low frequency electromagnetic sensor array further includes the second magnetic
Shielded layer 5, second magnetic masking layer 5 is fixed on the bottom of the sensor housing 1, and is arranged in first magnetic masking layer
Between 6 and electromagnet, and cover first magnetic masking layer 6.
In the present embodiment, first magnetic masking layer 6 is rectangle magnetic masking layer, and second magnetic masking layer 5 is annular
Magnetic masking layer.The material of first magnetic masking layer, 6 and/or second magnetic masking layer 5 is ferromagnetic material.First magnetic masking layer
6 and/or second magnetic masking layer 5 magnetic conductivity be less than the electromagnet magnetic conductivity.Shielding area is 7 institute of array coil set of pieces
Air section, it acts as shielding 7 ambient background magnetic field of magnetic array coil set of pieces to detect signal influence.
Further, the utility model Metal pipeline corrosion defects detection low frequency electromagnetic sensor array further includes bonding
Layer, the adhesive layer is arranged in the bottom of the sensor housing 1, and the array coil constituent element is provided on the adhesive layer
Part 7, the adhesive layer are used to the array coil set of pieces 7 being fixed on the bottom of the sensor housing 1.Preferably, institute
Adhesive layer is stated to be arranged in the groove of 1 bottom of the sensor housing.
In addition, the utility model Metal pipeline corrosion defects detection low frequency electromagnetic sensor array further includes wearing layer 8,
The wearing layer 8 is arranged in the bottom of the sensor housing 1, and the array coil constituent element is provided on the wearing layer 8
Part 7, the first magnetic masking layer 6, electromagnet.In the present embodiment, the adhesive layer is arranged in the upper surface of the wearing layer 8, institute
The upper surface for stating adhesive layer 8 is provided with the array coil set of pieces 7.
As shown in Figure 1, the electromagnet includes excitation coil 3 and magnetic core 4, the both ends of the magnetic core 4 are fixed on the biography
The bottom of sensor shell 1, and the excitation coil is on the magnetic core passes through matching for the excitation coil 3 and magnetic core 4
It closes, generates the pumping signal of sensor.Preferably, the shape of the magnetic core 4 is arc.
As shown in Fig. 2, the array coil set of pieces 7 includes 2n coil being connect with the pigtail splice 1, each institute
The bottom that coil is evenly spaced in the sensor housing at two row n rows is stated, two coils in every a line form an acquisition
Channel, for acquiring differential signal, n is the integer more than 0.In the present embodiment, 8 n.By the way that 16 coils, acquisition 8 is arranged
The differential signal is sent in computer by the differential signal in a channel, is carried out imaging, is obtained defects detection image.
Specifically, when pipe surface zero defect in detection, detection signal is substantially unchanged；When one alignment circle scanning of front
When by pipe surface defect, behind an alignment circle also in normal base material position when, which there is larger difference
It is different, utilize this principle, you can detect the start-stop position of the defect of pipe surface, and preferably filter out ambient noise.
Wherein, it is detected with low frequency electromagnetic sensor array using the utility model Metal pipeline corrosion defects detection
When, specifically include following steps：
When A, detecting, using coil winding yoke as sensor, low frequency ac is applied to coil and flows into row energization；By
Kelvin effect is will produce in the magnetizing field by the way of ac-excited, generated in coil, by magnetizing the magnetic field generated later
It will focus on the surface layer of test specimen；
B, low-frequency exciting current makes the penetration depth in magnetic field increase, when sensor is moved to defective place, magnetic force
Line can be distorted, to overflow to form stray field in fault location；
C, it being made of 16 coils in the sensor array of yoke arranged beneath, adjacent coil does differential signal two-by-two,
Play detection；
D, the electromagnetic field signal received is analyzed by computer, determines the relevant information of defect.
The utility model using low-frequency ac due to being encouraged so that penetration depth increases, and detection depth increases.In acquisition
In signal message, not only there are conventional amplitude information, also phase information.Exactly because and the increase of signal parameter, certain
The reliability and precision of detection are improved in degree.Meanwhile the utility model is based on low frequency electromagnetic detection method, and use array
Sensor is detected, and solves the problems, such as that leakage field, eddy current sensor detection spatial resolution is low and sensitivity is not high.
In conclusion the utility model structural principle is simple, easy to use, detection efficiency is high, can utmostly reduce
The check frequency of sensor can be applied to the detection that pipeline, tube wall are completed from external scan；The utility model detects depth
Greatly, the high speed that wide area can be realized without the use of mechanical scanning probe measures, and can reach and single sensor
Identical measurement accuracy and resolution ratio are effectively improved test speed, measurement accuracy and the reliability of sensing system.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
Specific case used herein is expounded the principles of the present invention and embodiment, above example
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, according to the thought of the utility model, 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 (9)
1. a kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array, which is characterized in that the low frequency electromagnetic battle array
Sensor includes pigtail splice, sensor housing and is arranged in the sensor shell body and is fixed on sensor housing bottom
The array coil set of pieces in portion, the first magnetic masking layer, electromagnet；
Wherein, the outside of the array coil set of pieces is equipped with first magnetic masking layer, electromagnet successively；The pigtail splice
It is arranged in the outside of the sensor housing, and is electrically connected with the array coil set of pieces.
2. Metal pipeline corrosion defects detection low frequency electromagnetic sensor array according to claim 1, which is characterized in that
The array coil set of pieces includes equal 2n coil being connect with the pigtail splice, and each coil is uniform at two row n rows
It is arranged in the bottom of the sensor housing, two coils in every a line form an acquisition channel, for acquiring difference letter
Number, n is the integer more than 0.
3. Metal pipeline corrosion defects detection low frequency electromagnetic sensor array according to claim 1, which is characterized in that
The low frequency electromagnetic sensor array further includes：
Second magnetic masking layer is fixed on the bottom of the sensor housing, and is arranged in first magnetic masking layer and electromagnet
Between, and cover first magnetic masking layer.
4. Metal pipeline corrosion defects detection low frequency electromagnetic sensor array according to claim 1, which is characterized in that
The low frequency electromagnetic sensor array further includes：
Adhesive layer is arranged in the bottom of the sensor housing, and the array coil set of pieces is provided on the adhesive layer,
Bottom for the array coil set of pieces to be fixed on to the sensor housing.
5. Metal pipeline corrosion defects detection low frequency electromagnetic sensor array according to claim 1, which is characterized in that
The low frequency electromagnetic sensor array further includes：
Wearing layer is arranged in the bottom of the sensor housing, and be provided on the wearing layer array coil set of pieces,
First magnetic masking layer, electromagnet.
6. Metal pipeline corrosion defects detection low frequency electromagnetic sensor array according to any one of claims 1-5,
It is characterized in that, the electromagnet includes excitation coil and magnetic core, the both ends of the magnetic core are fixed on the sensor housing
Bottom, and the excitation coil is on the magnetic core.
7. Metal pipeline corrosion defects detection low frequency electromagnetic sensor array according to claim 6, which is characterized in that
The shape of the magnetic core is arc.
8. Metal pipeline corrosion defects detection low frequency electromagnetic sensor array according to claim 3, which is characterized in that
The material of first magnetic masking layer and/or the second magnetic masking layer is ferromagnetic material.
9. Metal pipeline corrosion defects detection low frequency electromagnetic sensor array according to claim 8, which is characterized in that
The magnetic conductivity of first magnetic masking layer and/or the second magnetic masking layer is less than the magnetic conductivity of the electromagnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721874941.3U CN207636538U (en) | 2017-12-28 | 2017-12-28 | A kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721874941.3U CN207636538U (en) | 2017-12-28 | 2017-12-28 | A kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207636538U true CN207636538U (en) | 2018-07-20 |
Family
ID=62851335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721874941.3U Active CN207636538U (en) | 2017-12-28 | 2017-12-28 | A kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207636538U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037178A (en) * | 2017-12-28 | 2018-05-15 | 中国特种设备检测研究院 | A kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array |
| CN110208366A (en) * | 2019-06-21 | 2019-09-06 | 西红柿科技（武汉）有限公司 | A kind of integrated form Energizing unit for Magnetic Flux Leakage Inspecting |
-
2017
- 2017-12-28 CN CN201721874941.3U patent/CN207636538U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037178A (en) * | 2017-12-28 | 2018-05-15 | 中国特种设备检测研究院 | A kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array |
| CN108037178B (en) * | 2017-12-28 | 2024-03-08 | 中国特种设备检测研究院 | Low-frequency electromagnetic array sensor for detecting corrosion defects of metal pipeline |
| CN110208366A (en) * | 2019-06-21 | 2019-09-06 | 西红柿科技（武汉）有限公司 | A kind of integrated form Energizing unit for Magnetic Flux Leakage Inspecting |
| CN110208366B (en) * | 2019-06-21 | 2023-10-20 | 西红柿科技（武汉）有限公司 | Integrated excitation unit for magnetic leakage detection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102759567B (en) | The EDDY CURRENT identification of steel pipe inside and outside wall defect and evaluation method under DC magnetization | |
| JP5522699B2 (en) | Nondestructive inspection apparatus and nondestructive inspection method using pulse magnetism | |
| CN101520435B (en) | Method and device for detecting corrosion of component with permeability magnetic material protective layer | |
| JP6253118B2 (en) | Differential sensor, inspection system, and method for detecting abnormality of conductive material | |
| CN108088900B (en) | Multifunctional composite probe for pipeline internal detection | |
| CN106770636A (en) | A kind of magnetic drives formula Array eddy-current probe and method for defect inspection | |
| CN204044110U (en) | A kind of the cannot-harm-detection device for metallic conduit | |
| CN108037178A (en) | A kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array | |
| CN207636538U (en) | A kind of Metal pipeline corrosion defects detection low frequency electromagnetic sensor array | |
| CA2821256C (en) | Broadband eddy current probe | |
| Li et al. | Inner circumferential current field testing system with TMR sensor arrays for inner-wall cracks inspection in aluminum tubes | |
| CN101281166A (en) | Method and apparatus for permanent magnetism destabilization nondestructive detection | |
| CN111929356B (en) | Steel defect magnetic imaging device and method | |
| CN105784839A (en) | Method for detecting micro-defects on surfaces of metal container | |
| CN113433212A (en) | Uniform field excitation directional eddy current probe with strong interference resistance and detection method | |
| CN108008005A (en) | A kind of metallic conduit defects detection low frequency electromagnetic flexible array sensor | |
| KR101339117B1 (en) | Apparatus and method for detecting the defects of reverse side using pulsed eddy current | |
| CN207908434U (en) | A kind of multifunctional combination probe for pipeline detection | |
| CN107356664A (en) | A kind of ferrimagnet defect detecting device based on low frequency leakage field | |
| CN109884175A (en) | A kind of metal pipeline flaw detection device of low frequency electromagnetic combination magnetic powder | |
| CN206489116U (en) | A kind of magnetic drives formula Array eddy-current probe for defect inspection | |
| EP1877767A2 (en) | Near fieldtm and combination near fieldtm - remote field electromagnetic testing (et) probes for inspecting ferromagnetic pipes and tubes such as those used in heat exchangers | |
| Le et al. | Electromagnetic testing of moisture separator reheater tubes using a bobbin-type integrated Hall sensor array | |
| CN205656166U (en) | Nearly surperficial small crack detection device of pressure -bearing equipment | |
| Wang et al. | A new system for defects inspection of boiler water wall tubes using a combination of EMAT and MFL |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |