CN107490619A - A kind of miniature Magnetic Flux Leakage Inspecting instrument probe - Google Patents
A kind of miniature Magnetic Flux Leakage Inspecting instrument probe Download PDFInfo
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- CN107490619A CN107490619A CN201610409939.2A CN201610409939A CN107490619A CN 107490619 A CN107490619 A CN 107490619A CN 201610409939 A CN201610409939 A CN 201610409939A CN 107490619 A CN107490619 A CN 107490619A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/87—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields using probes
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Abstract
The present invention is applied to field of non destructive testing, a kind of miniature Magnetic Flux Leakage Inspecting instrument probe is provided, including the forward metal block being fixed as one, soft magnetic bodies and back-end metal block, the forward metal block both sides are provided with front wheel, the back-end metal block is provided with rear roller, the back-end metal block is provided with notch bottom-up, photoelectric encoder is placed with the notch, the fixation metal derby of n shapes is further fixed on below the soft magnetic bodies, the soft magnetic bodies bottom and position between fixed metal derby and front end back-end metal block is respectively and fixedly provided with permanent magnet, the sensor base of n shapes is further fixed in the bottom slot of the fixed metal derby, the inwall of the sensor base also sets up a pair of chutes, sensor circuit board is inserted between the chute.Miniature Magnetic Flux Leakage Inspecting instrument probe provided by the invention, design is succinct, compact-sized, using miniaturized design, is easy to carry, while easy to operation, the detection especially suitable for small-sized sheet material or pipeline.
Description
Technical field
The invention belongs to technical field of nondestructive testing, more particularly to a kind of miniature Magnetic Flux Leakage Inspecting instrument probe.
Background technology
Magnetic Flux Leakage Inspecting technology removes heat by catharsis dew to detect defect by detection magnetic.Its principle is utilized in ferromagnetic object to be detected
The defects of caused by caused by magnetic conductivity discontinuity magnetic flux reveal.Compared to other defect detecting techniques, such as magnetic, whirlpool
Stream etc., Magnetic Flux Leakage Inspecting technology investigation depth is deeper, can detect 20 millimeters of depth.At some in particular cases, leakage field is examined
Survey technology can be used for detecting the reverse side of object to be checked, such as the lower surface of storage tank bottom plate, outer surface when being examined in pipeline, pipeline
Inner surface during outer inspection etc..
In view of the maturation and validity of Magnetic Flux Leakage Inspecting technology, it has become a kind of Non-Destructive Testing national standard.In general
In embodiment, it is to use electronic or manual form, makes the instrument of relatively large-scale.For storage tank bottom plate, or Large Steel
Plate, long distance pipeline etc., the effect of these large-scale Magnetic Flux Leakage Inspecting instruments can give play to maximum.But for small-sized pipeline or
Person's flat board etc., these original large-scale instruments do not apply on the contrary.
The content of the invention
In view of the above problems, it is an object of the invention to provide a kind of miniature Magnetic Flux Leakage Inspecting instrument probe, it is intended to solves existing
Magnetic Flux Leakage Inspecting instrument is inconvenient to detect the technical problem of small pipeline or flat board.
The present invention adopts the following technical scheme that：
The miniature Magnetic Flux Leakage Inspecting instrument probe includes forward metal block, soft magnetic bodies and the back-end metal block being fixed as one,
The soft magnetic bodies are in an intermediate position, and the forward metal block both sides are provided with front wheel, after the back-end metal block is provided with
Roller, the back-end metal block are provided with notch bottom-up, are placed with photoelectric encoder in the notch, under the soft magnetic bodies
Side is further fixed on the fixation metal derbies of n shapes, the soft magnetic bodies bottom and between fixed metal derby and front end back-end metal block
Position be respectively and fixedly provided with permanent magnet, the sensor base of n shapes, the biography are further fixed in the bottom slot of the fixed metal derby
The inwall of sensor base also sets up a pair of chutes, and sensor circuit board, the photoelectric encoder and institute are inserted between the chute
Sensor circuit board is stated to connect by wire.
Further, it is additionally provided with handle at the top of the soft magnetic bodies.
Further, the soft magnetic bodies both ends extend downwardly from a small stair, and the permanent magnet is located at below the small stair,
The fixed metal derby is placed exactly between two small stairs, and a counterbore is provided with each small stair, is penetrated in the counterbore
Screw, then it is screwed into and is fixed to the handle bottom.
Further, soft magnetic bodies bottom centre position sets row's king bolt hole, and king bolt hole both sides are respectively set
Row's primary screw hole is put, is additionally provided with registration holes corresponding with the primary screw hole site at the top of the fixed metal derby, each
Registration holes penetrate screw and are screwed into corresponding primary screw hole so that the fixed metal derby is fixed into the soft magnetic bodies bottom.
Further, the fixed metal derby crown center is also provided with opening, is provided with the top of the sensor base solid
Determine hole, screw is penetrated in the fixing hole and then passes through the king bolt hole that the opening is finally screwed into correspondence position, to fix
The sensor base.
Further, the first translot is provided with the small stair of back-end metal block, is provided with the top of the fixed metal derby
Second translot, second translot and the open communication, first translot and the second translot are located at same straight line, the biography
The top of sensor base is also provided with wire guide, and the sensor circuit board passes sequentially through the wire guide, opening, second with wire
Translot, the first translot, the notch of back-end metal block are connected to the photoelectric encoder.
Further, both sides are bevelling shape at the top of the sensor base.
Further, the sensor circuit board also leads to lug wire, and the lug wire is directly from sensor bottom
Seat lower section is extended out, and the lug wire is fixed in soft magnetic bodies, whole miniature Magnetic Flux Leakage Testing Instrument by a metal sheeting
The periphery of probe, it is additionally provided with the metal plate protective case made using nonmagnetic sheet metal.
Further, countersunk screw holes, the countersunk head are provided with the end face of the forward metal block and back-end metal block
Screw penetrates screw and fixed in the soft magnetic bodies；The back-end metal block is provided with a pair of bearings hole, in each bearing hole
Bearing is installed, a metal shaft is placed with two bearings, two rear rollers are screwed in the both ends of the metal shaft,
The coding disk of the photoelectric encoder is fixed on the centre of metal shaft, the detector of the photoelectric encoder, installed in rear end gold
On the inwall for belonging to block bottom slot, the both ends of the metal shaft, between bearing and rear roller, respectively there is a jump-ring slot, be used for
Limitation metal shaft slides laterally.
Further, the bottom surface of the miniature Magnetic Flux Leakage Inspecting instrument probe can be plane, can also make curved surface, work as needs
When making curved form, the additional curved surface magnetic pole of permanent magnet, it is easy to the conducting of magnetic flux, remaining surface, including front end
Metal derby, back-end metal block, fixed metal derby, sensor base, metal plate protective case, need also exist for adapting to curvature of curved surface so that
Its curvature of curved surface coincide with subject surface to be detected.
The beneficial effects of the invention are as follows：Miniature Magnetic Flux Leakage Inspecting instrument probe provided by the invention, design is succinct, compact-sized,
Using miniaturized design, it is easy to carry, while easy to operation, the detection especially suitable for small-sized sheet material or pipeline.
Brief description of the drawings
Fig. 1 is the structure chart of miniature Magnetic Flux Leakage Inspecting instrument probe provided in an embodiment of the present invention.
Fig. 2 is the upward view of miniature Magnetic Flux Leakage Inspecting instrument probe；
Fig. 3 is the structure chart of soft magnetic bodies；
Fig. 4 is the structure chart of fixed metal derby；
Fig. 5 is the structure chart of sensor base.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
As described in Fig. 1,2, the miniature Magnetic Flux Leakage Inspecting instrument probe of the present embodiment offer, including the forward metal being fixed as one
Block 1, soft magnetic bodies 2 and back-end metal block 3, the soft magnetic bodies 2 are in an intermediate position, before the both sides of forward metal block 1 are provided with
Roller 11, the back-end metal block 3 are provided with rear roller 31, and the back-end metal block is provided with notch, the groove bottom-up
Intraoral to be placed with photoelectric encoder (not shown), the lower section of soft magnetic bodies 2 is further fixed on the fixation metal derby 4 of n shapes, n shapes
It is as inverted U-shaped, similarly hereinafter.The bottom of soft magnetic bodies 2 and position between fixed metal derby 4 and front end back-end metal block is solid
Surely there is permanent magnet 5, the sensor base 6 of n shapes, the sensor bottom are further fixed in the bottom slot of the fixed metal derby 4
The inwall of seat 6 also sets up a pair of chutes 61, and sensor circuit board (not shown), the photoelectricity are inserted between the chute 61
Encoder is connected with the sensor circuit board by wire.Additionally, it is preferred that, the top of soft magnetic bodies 2 is additionally provided with handle 7,
Whole probe is conveniently picked up by the handle 7.
In this structure, the forward metal block, back-end metal block and fixed metal derby use duralumin or other no magnetic
Property metal material make, the sensor base using soft magnetic materials making.The soft magnetic bodies and permanent magnet are fixed on front end
Between aluminium block and rear end aluminium block, soft magnetic bodies are made using soft magnetic materials, and its effect is the outside magnetic circuit of excitation part.Here
The forward metal block, back-end metal block and soft magnetic bodies are fixed as one, and soft magnetic bodies form the mechanical part main body integrally popped one's head in,
Remaining part is typically directly or indirectly connected in soft magnetic bodies.As a kind of fixed form, the forward metal block is with after
Hold and countersunk screw holes are provided with the end face of metal derby, the countersunk screw holes penetrate screw and fixed in the soft magnetic bodies.Institute
State front wheel and use plastic package, be affixed directly to by bolt on forward metal block.On the whole, forward metal block plays one
Front wheel support acts on, while forward metal block also acts as protection and the effect of fixed permanent magnet below.The fixed metal derby
Main function has at 2 points：First is the position for limiting permanent magnet, and second is to provide a fixed plane for sensor base.
The back-end metal block bottom, a pair of bearings hole is provided with, bearing is installed in each bearing hole, in two bearings
A metal shaft 31 is placed with, two rear rollers are screwed in the both ends of the metal shaft, the volume of the photoelectric encoder
Code-disc is fixed on the centre of metal shaft, the detector of the photoelectric encoder, installed in the inwall of back-end metal block bottom slot
On.It is preferable in addition, the both ends of the metal shaft, between bearing and rear roller, respectively there is a jump-ring slot, for fixing metal
Axle slides laterally, and keeps the distance between rear roller and back-end metal block, while avoid the coding disk of encoder from encountering coding
The detector of device itself.
The present apparatus is compact-sized, using miniaturized design, for convenience of carrying, overall dimensions can accomplish it is smaller, simultaneously
It is easy to operation, suitable for the detection of small-sized sheet material or pipeline.
As a kind of concrete structure of the soft magnetic bodies 2, as shown in figure 3, the both ends of the soft magnetic bodies 2 extend downwardly from Yi little Tai
Rank 21, the permanent magnet 5 are placed exactly between two small stairs 21 positioned at the lower section of small stair 21, the fixed metal derby 4,
The small stair 21 plays the position-limiting action of fixed metal derby 4.A counterbore 22, the counterbore 22 are provided with each small stair 21
Screw is inside penetrated, is then screwed into and is fixed to the bottom of handle 7, realize the installation of handle.The bottom interposition of soft magnetic bodies 2
Row's king bolt hole 23 is installed, the both sides of king bolt hole 23 respectively set row's primary screw hole 24, it is illustrated that in, the king bolt
Hole 23 has 2, right two rows totally 4 in the primary screw hole.Here two king bolt holes 23 are used to fix sensor base, remaining
Four primary screw holes are used to install fixed metal derby.Specifically, the structure of the fixation metal derby 4 with reference to shown in Fig. 4, the fixation
4 pieces of tops of metal derby are additionally provided with the registration holes 41 with the position correspondence of primary screw hole 24, and the registration holes 41 also have 4,
Each registration holes 4 penetrate screw and are screwed into corresponding primary screw hole 24 so that the fixed metal derby 4 is fixed into the soft magnetism
The bottom of body 2.
In Fig. 4, the fixed crown center of metal derby 4 is also provided with a relatively large-sized opening 42, the work of the opening
Fixed with the sensor base being easy for below, while the unnecessary wire of photoelectric encoder can be accommodated.With reference to shown in Fig. 5
Sensor base structure, the top of the sensor base 6 is provided with fixing hole 62, and it is right to penetrate screw in the fixing hole 62
The king bolt hole 23 of correspondence position is finally screwed into through the opening 42 afterwards, realizes the fixation of sensor base 4.In addition, institute
The shape that both sides at the top of sensor base are fabricated to bevelling is stated, main purpose is to reduce the suction to the magnetic field of leaking of excitation part
Receive.
In addition, being provided with the first translot 25 on the small stair of back-end metal block 3, the fixed top of metal derby 4 is provided with
Second translot 43, second translot 43 connect with the opening 42, and the translot 43 of the first translot 25 and second is positioned at same
Straight line, the top of the sensor base 6 are also provided with wire guide 63, and the sensor circuit board passes sequentially through described lead with wire
String holes 63, the 42, second translot 43 of opening, the first translot 25, the notch of back-end metal block are connected to the photoelectric encoder.
The sensor circuit board also leads to lug wire, and the lug wire is directly from notch below sensor base
Extend out, the lug wire is fixed in soft magnetic bodies 2 by a metal sheeting 26.As preferable, whole miniature leakage
The periphery of Magnetic testi instrument probe, be additionally provided with using nonmagnetic sheet metal make metal plate protective case, further protect permanent magnet,
The parts such as Magnetic Sensor.
It should be strongly noted that although specification miniature Magnetic Flux Leakage Inspecting instrument probe bottom shown in the drawings is plane,
For ruled surfaces such as small pipelines, on the premise of it need not change structure thought of the present invention, probe bottom surface can also be changed
Into the form of curved surface, it is easy to the detection of curved surface.Wherein, permanent magnet needs additional curved surface magnetic pole, is easy to the conducting of magnetic flux.Its
Remaining surface, such as front end aluminium block, thickness aluminium block, fixed aluminium block, sensor base, sensor circuit board and metal plate protective case
Deng, also to adapt to curvature of curved surface, as far as possible and subject surface to be detected coincide.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
1. a kind of miniature Magnetic Flux Leakage Inspecting instrument probe, it is characterised in that the probe includes the forward metal block, soft being fixed as one
Magnet and back-end metal block, the soft magnetic bodies are in an intermediate position, and the forward metal block both sides are provided with front wheel, after described
End metal derby is provided with rear roller, and the back-end metal block is provided with notch bottom-up, and photoelectricity volume is placed with the notch
Code device, is further fixed on the fixation metal derby of n shapes below the soft magnetic bodies, the soft magnetic bodies bottom and positioned at fixed metal derby with before
Position between the back-end metal block of end is respectively and fixedly provided with permanent magnet, and n shapes are further fixed in the bottom slot of the fixed metal derby
Sensor base, the inwall of the sensor base also set up a pair of chutes, sensor circuit board, institute are inserted between the chute
Photoelectric encoder is stated to be connected by wire with the sensor circuit board.
2. miniature Magnetic Flux Leakage Inspecting instrument probe as claimed in claim 1, it is characterised in that be additionally provided with handle at the top of the soft magnetic bodies.
3. miniature Magnetic Flux Leakage Inspecting instrument probe as claimed in claim 2, it is characterised in that it is small that the soft magnetic bodies both ends extend downwardly from one
Step, the permanent magnet are located at below the small stair, and the fixed metal derby is placed exactly between two small stairs, Mei Ge little
A counterbore is provided with step, screw is penetrated in the counterbore, is then screwed into and is fixed to the handle bottom.
4. miniature Magnetic Flux Leakage Inspecting instrument probe as claimed in claim 3, it is characterised in that soft magnetic bodies bottom centre position is set
One row's king bolt hole, king bolt hole both sides respectively set row's primary screw hole, be additionally provided with the top of the fixed metal derby with
Registration holes corresponding to the primary screw hole site, each registration holes penetrate screw and are screwed into corresponding primary screw hole so that by institute
State fixed metal derby and be fixed to the soft magnetic bodies bottom.
5. miniature Magnetic Flux Leakage Inspecting instrument probe as claimed in claim 4, it is characterised in that the fixed metal derby crown center is also opened
There is opening, fixing hole is provided with the top of the sensor base, screw is penetrated in the fixing hole and then passes through the opening most
The king bolt hole of correspondence position is screwed into afterwards, to secure the above sensor base.
6. miniature Magnetic Flux Leakage Inspecting instrument probe as claimed in claim 5, it is characterised in that opened on the small stair of back-end metal block
There is the first translot, be provided with the second translot, second translot and the open communication at the top of the fixed metal derby, described first
Translot and the second translot are located at same straight line, and the top of the sensor base is also provided with wire guide, the sensor circuit board
With wire pass sequentially through the wire guide, opening, the second translot, the first translot, back-end metal block notch be connected to the light
Photoelectric coder.
7. miniature Magnetic Flux Leakage Inspecting instrument probe as claimed in claim 6, it is characterised in that both sides is at the top of the sensor base
Side shape.
8. miniature Magnetic Flux Leakage Inspecting instrument probe as claimed in claim 7, it is characterised in that the sensor circuit board, which is also led to, to be connect
Head wire, the lug wire directly extend out below sensor base, and the lug wire passes through a metal sheeting
It is fixed in soft magnetic bodies, the periphery of whole miniature Magnetic Flux Leakage Inspecting instrument probe, is additionally provided with the metal plate made using nonmagnetic sheet metal
Golden protective case.
9. the miniature Magnetic Flux Leakage Inspecting instrument probe as described in claim any one of 1-8, it is characterised in that the forward metal block is with after
Hold and countersunk screw holes are provided with the end face of metal derby, the countersunk screw holes penetrate screw and fixed in the soft magnetic bodies；Institute
State back-end metal block and be provided with a pair of bearings hole, bearing is installed in each bearing hole, a metal is placed with two bearings
Axle, two rear rollers are screwed in the both ends of the metal shaft, and the coding disk of the photoelectric encoder is fixed on metal shaft
Centre, the detector of the photoelectric encoder, on the inwall of back-end metal block bottom slot, the two of the metal shaft
, between bearing and rear roller, respectively there is a jump-ring slot at end, for limiting sliding laterally for metal shaft.
10. the miniature Magnetic Flux Leakage Inspecting instrument probe as described in claim any one of 1-8, it is characterised in that the miniature Magnetic Flux Leakage Inspecting
The bottom surface of instrument probe can be plane, can also make curved surface, when needing to make curved form, the additional curved surface of permanent magnet
Magnetic pole, it is easy to the conducting of magnetic flux, remaining surface, including forward metal block, back-end metal block, fixed metal derby, sensing
Device base, need also exist for adapting to curvature of curved surface so that its curvature of curved surface coincide with subject surface to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610409939.2A CN107490619B (en) | 2016-06-12 | 2016-06-12 | Miniature magnetic leakage detector probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610409939.2A CN107490619B (en) | 2016-06-12 | 2016-06-12 | Miniature magnetic leakage detector probe |
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| Publication Number | Publication Date |
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| CN107490619A true CN107490619A (en) | 2017-12-19 |
| CN107490619B CN107490619B (en) | 2021-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610409939.2A Active CN107490619B (en) | 2016-06-12 | 2016-06-12 | Miniature magnetic leakage detector probe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884172A (en) * | 2019-04-12 | 2019-06-14 | 中国石油化工股份有限公司 | A kind of excitation structure for plate Magnetic Flux Leakage Inspecting |
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| US20120253696A1 (en) * | 2011-03-29 | 2012-10-04 | Neil Randal Pearson | Methods and apparatus for the inspection of plates and pipe walls |
| CN103698390A (en) * | 2013-12-18 | 2014-04-02 | 浙江省特种设备检验研究院 | Defect and magnetic leakage detection device for underground oil storage tank |
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| US5442287A (en) * | 1993-05-03 | 1995-08-15 | Tuboscope Vetco (Deutschland) Gmbh | Method and apparatus for detecting magnetic discontinuities by inducing a magnetic field in a magnetizable sample |
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| CN201417262Y (en) * | 2009-07-02 | 2010-03-03 | 戴光 | Hand-operated and power-operated integrated magnetic leakage detector for storage tank bottom plate |
| CN201548519U (en) * | 2009-11-10 | 2010-08-11 | 大庆石油学院 | Wall-climbing magnetic leakage scanning detector for storage tank wallboard |
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| CN109884172A (en) * | 2019-04-12 | 2019-06-14 | 中国石油化工股份有限公司 | A kind of excitation structure for plate Magnetic Flux Leakage Inspecting |
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| CN107490619B (en) | 2021-02-05 |
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