CN108828061A - A kind of eddy current testing device of stainless steel jointless short tube surface microscopic defect - Google Patents
A kind of eddy current testing device of stainless steel jointless short tube surface microscopic defect Download PDFInfo
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- CN108828061A CN108828061A CN201810613801.3A CN201810613801A CN108828061A CN 108828061 A CN108828061 A CN 108828061A CN 201810613801 A CN201810613801 A CN 201810613801A CN 108828061 A CN108828061 A CN 108828061A
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- guide rod
- stainless steel
- short tube
- mounting bracket
- block
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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
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9013—Arrangements for scanning
- G01N27/902—Arrangements for scanning by moving the sensors
Abstract
The invention discloses a kind of eddy current testing devices of stainless steel jointless short tube surface microscopic defect, and wherein connection plate is fixedly connected with external drive mechanism；One end of moving leader passes through connection plate and is fixedly connected with the rotary stopper plate for limiting to moving leader downlink, and the other end is fixedly connected with mounting bracket；Compressed spring covers on moving leader, for applying the pressure of mounting bracket downlink；Demountable panel is detachably installed with mounting bracket and is connect；V-block and demountable panel and mounting bracket are rotatablely connected；The bottom of V-block has V-groove；Vortex flow dot type probe is located at the central area of V-block, and the bottom for facing V-groove is arranged outward；V-groove is for detent on the surface of detected stainless steel jointless short tube.This invention ensures that lift off is consistent in vortex flow dot type probe detection process, and the influence of Lift-off effect when avoiding detection, the final reliability for guaranteeing testing result.
Description
Technical field
It is fine scarce that the invention belongs to nondestructive detecting technology of vortex fields more particularly to a kind of stainless steel jointless short tube surface
Sunken eddy current testing device.
Background technique
Eddy current inspection is that stainless steel jointless short tube outer wall defect predominantly detects one of means, has that detection speed is fast, inspection
The advantages of surveying high sensitivity, and detection couplant and no pollution to the environment are not needed, it has been widely used.Whirlpool
The most common two kinds of detection modes of stream flaw detection are respectively that through mode flaw detection and point type are detected a flaw, respectively as depicted in figs. 1 and 2：
When being detected a flaw using through mode, stainless-steel seamless pipe high speed passes through probe inner hole and can complete to detect a flaw；Using point type
When flaw detection, since the effective area of detection of probe is smaller, the scanning on the entire cylindrical surface of stainless-steel seamless pipe is completed,
It needs to form opposed helical movement between probe and seamless steel pipe, and screw pitch is no more than effective detecting distance of probe.From
From the perspective of precision of detecting a flaw, the remote super through mode flaw detection of point type flaw detection, electromagnetic field is opposite when main cause is vortex flow dot type flaw detection
It concentrates, therefore to the far super through mode eddy current inspection of the resolution ratio of defect.
When vortex flow dot type is detected a flaw, to realize that the opposed helical between vortex probe and seamless steel pipe moves, can be used two
Kind mode：A kind of mode be seamless steel pipe along its axis linear uniform motion while probe revolved around seamless steel pipe axis high speed
Turn, because of eddy current probe high speed rotation when which detects, needs to consider the coupled transfer problem of electric signal, detection structure is more
It is complicated；Seamless steel pipe is around its axis high speed while another way is is vortexed probe along steel pipe axis linear uniform motion
Rotation, the coupled transfer of electric signal is easy to accomplish when which detects, and detection structure is simple and reliable.
Although vortex flow dot type is detected a flaw, detection accuracy is high, by Lift-off effect (i.e. vortex probe end face and tested seamless steel
The distance change of pipe surface) influence it is very big, the smaller detection sensitivity of lift off is higher, and lift off is answered small under normal conditions
In 0.5mm.During engineering detecting, by being vortexed, the position change of probe, seamless steel pipe cylindricity is exceeded, seamless steel pipe is straight
The exceeded equal influence of dimension, lift off are easy to happen change, and small variation will bring very big shadow to detection signal
It rings, eventually leads to the uncertain of testing result and occur.
Summary of the invention
The detection that the purpose of the present invention is cooperate vortex probe at the uniform velocity to move based on stainless steel jointless short tube high speed rotation
Mode guarantees the lift off of vortex probe by the detection device of flexibility and reliability, realizes stainless steel jointless short tube appearance
The accurate judgement of face microscopic defect.
To achieve the above object, the technical solution adopted by the present invention is that：
A kind of eddy current testing device of stainless steel jointless short tube surface microscopic defect, including connection plate, movement are led
Bar, rotary stopper plate, compressed spring, mounting bracket, demountable panel, V-block and vortex flow dot type probe；The connection plate
Mechanism is fixedly connected with external drive；One end of the moving leader passes through the connection plate and is used for the movement
The rotary stopper plate of guide rod downlink limit is fixedly connected, and the other end is fixedly connected with the mounting bracket；The compression bullet
Spring covers on the moving leader, is connected to the rotary stopper plate in the connection plate to press；It is described removable
It unloads plate and is detachably installed with the mounting bracket and is connect；The V-block and the demountable panel and mounting bracket rotation connect
It connects；The bottom of the V type block has V-groove；The vortex flow dot type probe is located at the central area of the V-block, and face
The bottom of the V-groove be arranged outward；The V-groove is for detent on the surface of detected stainless steel jointless short tube.
Preferably, eddy current testing device includes linear bearing, the top of the linear bearing is cylindrical structure, and lower part is
Flange end cap；The cylindrical structure protrudes into the connection plate, and the flange end cap is fixed with the connection plate
Connection；The moving leader includes coaxially formed upper section guide rod, middle section guide rod and lower section guide rod, and the middle section from top to bottom
The radius of guide rod is greater than the radius of the upper section guide rod and the lower section guide rod；Institute is sequentially passed through at the top of the upper section guide rod
Cylindrical structure and the connection plate is stated to be fixedly connected with the rotary stopper plate；The compressed spring is covered in the upper section
On guide rod, and upper end is connected in the flange end cap, and lower end is connected on the upper shaft shoulder of the middle section guide rod；The installation
Bracket is equipped with guide rod installing hole, and the lower section guide rod is mounted in the guide rod installing hole；The lower shaft shoulder of the middle section guide rod
With the mounting bracket axially position.
Preferably, a tightening screw hole is vertical and interconnected with the guide rod installing hole；The side ream of the lower section guide rod
It is flat, pass through the fixed lower section guide rod of the tightening screw hole for holding screw.
Preferably, the rotary stopper plate includes horizontal segment and vertical section, the two forms L-type structure；The horizontal segment is logical
It crosses connection positioning bolt to connect with the screw top of the upper section guide rod, the vertical section is straight in the connection plate
Angle groove moves linearly, and not can be rotated.
Preferably, stepped hole is offered in the symmetric position of the demountable panel and the mounting bracket respectively, described
Miniature self-aligning ball bearing is installed, the two sides of the V-block pass through the miniature spherical ball of rotation axis and two sides respectively on rank hole
Bearing connection.
Preferably, the mounting bracket or the demountable panel are equipped with arc groove, the corresponding side of the V-block
Equipped with rotary stopper axis, the rotary stopper axis cooperates with the arc groove excessively to be rotated with limiting the V type block.
Preferably, connecting two extension springs between the mounting bracket and the V-block；Two extension springs
Restore the V-block to initial equilibrium conditions.
Preferably, the extension spring is buckle helical spring.
Preferably, the central area of the V-block is provided with through-hole；It is fixed that elastic clip is cased on the vortex flow dot type probe,
The two is installed in the through-hole, and it is fixed by holding screw to hold out against the elastic clip.
Preferably, the elastic clamping, which is put on, is equipped with opening.
Compared with prior art, the beneficial effects of the invention are as follows：
This invention ensures that lift off is consistent in vortex flow dot type probe detection process, lift-off when avoiding detection
The influence of effect, the final reliability for guaranteeing testing result；
Eddy current testing device according to the present invention has a style of one's own, can be integrated with different testing agencies, quick for installation, side
Just；
Eddy current testing device according to the present invention, the stainless steel jointless short tube outer wall for adapting to various different-diameters are fine
Defect detection, when replacing different-diameter Tube heating furnace, probe adjusts quick and easy.
Detailed description of the invention
Fig. 1 is the vortex through mode flaw detection schematic diagram of the prior art；
Fig. 2 is the vortex flow dot type flaw detection schematic diagram of the prior art；
Fig. 3 is a kind of eddy current testing device of stainless steel jointless short tube surface microscopic defect of one embodiment of the invention
Structural schematic diagram；
Fig. 4 is the structural schematic diagram of the connection plate of one embodiment of the invention；
Fig. 5 is the structural schematic diagram of the rotary stopper plate of one embodiment of the invention；
Fig. 6 is the structural schematic diagram of the moving leader of one embodiment of the invention；
Fig. 7 is the structural schematic diagram of the linear bearing of one embodiment of the invention；
Fig. 8 is the structural schematic diagram of the compressed spring of one embodiment of the invention；
Fig. 9 is the mounting bracket of one embodiment of the invention and the assembling schematic diagram of V-block；
Figure 10 is the mounting bracket of one embodiment of the invention and the assembling schematic diagram of demountable panel；
Figure 11 is the V-block of one embodiment of the invention and the assembling schematic diagram of component thereon；
Figure 12 is the cross-sectional view of the V-block of Figure 11；
Figure 13 is the fixed structural schematic diagram of the elastic clip of one embodiment of the invention；
Figure 14 is the structural schematic diagram of the extension spring of one embodiment of the invention；
Figure 15 is the constant schematic diagram of lift off when circumferentially rotating of one embodiment of the invention；
Figure 16 is that the steel pipe axis of one embodiment of the invention is remained unchanged with lift off when detection device middle line out of plumb
Schematic diagram, wherein (a) figure is steel pipe axis and detection device median perpendicular；(b) figure is steel pipe axis and detection device middle line
Out of plumb.
In figure, 1- connection plate；2- linear bearing；3- compressed spring；4- moving leader；5- mounting bracket；6- is removable
Unload plate；7- attachment screw；The miniature self-aligning ball bearing of 8-；9- rotation axis；10-V type block；11- stainless steel jointless short tube；12- rotation
Axis；The miniature self-aligning ball bearing of 13-；14- rotary stopper axis；15- vortex flow dot type probe；16- holding screw；17- rotary stopper
Plate；18- connection positioning bolt；19- is vortexed through mode probe；20- guide rod installing hole；21- tightening screw hole；22- stepped hole；23-
Arc groove；24- holding screw；25- elastic clip is fixed；26-V type groove；27- right angle groove；28- installation screw；29- installs spiral shell
Hole；30- mounting hole；31- connecting hole；32- upper section guide rod；The middle section 33- guide rod；34- lower section guide rod；The upper shaft shoulder of 35-；Under 36-
The shaft shoulder；38- spot facing；39- positioning screw hole；40- flange end cap；41- cylindrical structure；42,43- extension spring；44- fixes spiral shell
Nail；45,46- fixing threaded hole.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to each reality of the invention
The mode of applying is explained in detail.
Comprehensive reference Fig. 3 to Figure 14, a kind of EDDY CURRENT dress of stainless steel jointless short tube surface microscopic defect are asked below
It sets, including connection plate 1, moving leader 4, rotary stopper plate 17, compressed spring 3, mounting bracket 5, demountable panel 6, V-type
Block 10 and vortex flow dot type probe 15.Connection plate 1 is fixedly connected with external drive mechanism.One end of moving leader 4, which passes through, to be connected
It connects mounting plate 1 to be fixedly connected with the rotary stopper plate 17 for limiting 4 downlink of moving leader, the other end and mounting bracket 5 are solid
Fixed connection.3 sets of compressed spring on moving leader 4, the effect of compressed spring 3 is to prevent moving leader 4 in the detection process
Excessively moving up causes rotary stopper plate 17 to be disconnected mounting plate 1, while for vortex flow dot type probe 15 and being detected not
Lift off is kept to provide pressure between the rust seamless short tube 11 of steel.Detachably installation connects for demountable panel 6 and mounting bracket 5.V
Type block 10 and demountable panel 6 and mounting bracket 5 are rotatablely connected.The bottom of V-block 10 has V-groove 26.Vortex flow dot type probe 15
Positioned at the central area of V-block 10, the bottom for facing V-groove 26 is arranged outward, and adjustable vortex flow dot type probe 15 is stretched
The distance from bottom of V type groove 26 out.V-groove 26 is for detent on the surface of detected stainless steel jointless short tube 11.
In one embodiment, connection plate 1 is (as shown in Figure 4) is equipped with 4 installation screws, 28,4 installation screws
29,1 mounting hole 30 and 1 right angle groove 27.Entire eddy current testing device using connection plate 1 by 4 screws and
4 installation screws 28 are fixedly connected with external drive mechanism.The top of linear bearing 2 (as shown in Figure 7) is cylindrical structure 41,
Lower part is flange end cap 40, and cylindrical structure 41 protrudes into mounting hole 30, and flange end cap 40 stays in the outside of connection plate 1,
4 screws are threadedly coupled with 4 installation screws 29 and are fixedly connected with linear bearing 2 with connection plate 1.Rotary stopper plate 17
(as shown in Figure 5) includes horizontal segment and vertical section, and the two forms L-type structure, and horizontal segment is passed through by connection positioning bolt 18 to be connected
Hole 31 is connect to connect with the threaded one end for the moving leader 4 for passing through connection plate 1；Vertical section makees straight line shifting along right angle groove 27
It is dynamic.Wherein, right angle groove 27 plays circumferential position-limiting action, and limitation rotary stopper plate 17 is merely able to make straight line shifting along right angle groove 27
It is dynamic, it not can be rotated, avoid the eddy current testing device of lower part that from can not cooperating with stainless steel jointless short tube 11 because of rotation.Rotary stopper
Plate 17 is fixedly connected by connection positioning bolt 18 with the one end for the moving leader 4 for passing through connection plate 1, and effect has two
It is a, first is that preventing lower vortex detection device from rotating by rotary stopper plate 17；Second is that the eddy current testing device to lower part plays axis
To position-limiting action, it is detached from when preventing lower vortex detection device downward with connection plate 1.
In one embodiment, moving leader 4 it is (as shown in Figure 6) include from top to bottom coaxially formed upper section guide rod 32, in
Section guide rod 33 and lower section guide rod 34, and the radius of middle section guide rod 33 is greater than the radius of upper section guide rod 32 and lower section guide rod 34.Upper section
The top of guide rod 32 passes through linear bearing 2 and connection plate 1 is fixedly connected with rotary stopper plate 17.Specifically, upper section is led
The top of bar 32 has positioning screw hole 39, and connection positioning bolt 18 is threadedly coupled with positioning screw hole 39 by connecting hole 31 and will be moved
Dynamic guide rod 4 is fixed together with rotary stopper plate 17.3 sets of compressed spring on upper section guide rod 32, and upper end is connected to flange end
Lid 40, lower end are connected to the upper shaft shoulder 35 of moving leader 4.Wherein, the main function of compressed spring 3 is for vortex flow dot type probe
Lift off is kept to provide pressure between 15 and detected stainless steel jointless short tube 11.Mounting bracket 5 is equipped with guide rod installing hole
20, lower section guide rod 34 is mounted in guide rod installing hole 20.The lower shaft shoulder 36 and mounting bracket 5 of moving leader 4 play axially position
Effect.Tightening screw hole 21 is vertical and interconnected with guide rod installing hole 20.The side ream of lower section guide rod 34 is flat, and it is flat to form a ream
Face 38；Holding screw 16 passes through tightening screw hole 21 and is connected on spot facing 38, plays to moving leader 4 circumferentially positioned and fixed
Effect prevents mounting bracket 5 from rotating.
In one embodiment, mounting bracket 5 is combined with demountable panel 6, as shown in Figure 10, realizes whirlpool jointly
Flow the rotation positioning supporting role of dot type probe 15.Platform is offered respectively in the symmetric position of demountable panel 6 and mounting bracket 5
Rank hole (the installation location condition for meeting rolling bearing), to install miniature self-aligning ball bearing 13.As is illustrated by figs. 11 and 12, V
The central area of type block 10 is provided with through-hole；Elastic clip fixed 25 is cased on vortex flow dot type probe 15, the two is installed in through-hole,
And elastic clip fixed 25 is held out against by holding screw 24, vortex flow dot type probe 15 can be clamped and be positioned.Preferably, elastic
Gripping sleeve 25 is (as shown in figure 13) to be equipped with opening.When entire probe rotation rackwork (including V-block 10, rotation axis 9,
Rotation axis 12, miniature self-aligning ball bearing 8, miniature self-aligning ball bearing 13 and rotary stopper axis 14) be installed after, mounting bracket 5
It is fixed together with demountable panel 6 by 4 attachment screw 7 and 4 fixing threaded holes 46.Probe rotation is such as replaced to adjust
Components inside the device of position, as long as demountable panel 6 is separated with mounting bracket 5.Arc groove is provided in mounting bracket 5
23, but not limited to this, the effect of the arc groove 23 is：If the mass center of the V-block 10 comprising vortex flow dot type probe 15 deviates
The axis of moving leader 4, the rotary stopper axis 14 in the arc groove 23 limits V-block 10 and excessively rotates, to guarantee V-block 10
With detected 11 accurate fit of stainless steel jointless short tube.
When the outer diameter of detected stainless steel jointless short tube 11 changes, 26 both sides of V-groove are tangent with outer wall of steel pipe always,
But the lift off of 15 lower end surface of vortex flow dot type probe and outer wall of steel pipe changes, and at this time can unclamp holding screw 24, hand
Dynamic locking holding screw 24 after adjusting vortex flow dot type probe 15 to suitable position.
In one embodiment, the connection between mounting bracket 5 and V-block 10 is in addition to rotation axis 12 and rotary stopper axis
Except 14, also connected by extension spring 42,43.There are coaxial and horizontal center in mounting bracket 5,10 two sides of V-block respectively
Fixing threaded hole 45；The axis of four fixing threaded holes 45 is located in same vertical center plane；One end of extension spring 42 is fixed
In the fixing screws 44 that the left side of mounting bracket 5 and fixing threaded hole 45 cooperate, the other end be fixed on the left side of V-block 10 with
In the fixing screws 44 that fixing threaded hole 45 cooperates；One end of extension spring 43 is fixed on the right side of mounting bracket 5 and fixes spiral shell
In the fixing screws 44 that hole 45 cooperates, the other end hangs over the right side of V-block 10 and the fixing screws 44 of the cooperation of fixing threaded hole 45
On.
The main function of extension spring is：In detection process, double action of the V-block in external thrust and steel pipe resistance
Under, two V-type faces and tested steel tube surface are tangent, guarantee the lift off of vortex flow dot type probe, at this time the pulling force of extension spring
It is stretched less than external forces；After the completion of detection, V-block and tested steel pipe are detached from, and are made at this time in the pulling force of extension spring
Under, the fast quick-recovery initial equilibrium conditions of V-block.
The working principle of the eddy current testing device of one embodiment of the invention is as follows：
Lift off is guaranteed not according to the position for the outer diameter adjustment vortex flow dot type probe 15 for being tested steel pipe first before detection
More than 0.5mm.After eddy current testing device and external drive mechanism are connected by screw to, examined when stainless steel jointless short tube 11 enters
Location is set, and external drive mechanism pushes eddy current testing device to advance, V-block 10 and steel pipe surface face contact, be tested stainless steel without
High speed rotation under the action of external driving mechanism of short tube 11 is stitched, eddy current testing device is at the uniform velocity moved along steel pipe axis simultaneously.This
When tested stainless steel jointless short tube 11 external cylindrical surface and V-block 10 between make opposite sliding friction campaign.In compressed spring 3
Under the action of pressure, two bevel edges of V-groove 26 remain tangent with outer surface of steel tube, ensure that vortex flow dot type probe 15
Lift off remains unchanged, as shown in figure 15.On the other hand, when the axis and moving leader 4 of tested stainless steel jointless short tube 11
Axis out of plumb when, the miniature self-aligning ball bearing adjust automatically axis direction on 10 both sides of V-block, guarantee 26 liang of bevel edges of V-groove
It is contacted with the external cylindrical surface full duration of stainless steel jointless short tube 11, the final lift off for guaranteeing vortex flow dot type probe 15 is kept
It is constant, the unpredictable of testing result caused by changing because of lift off is avoided, as shown in figure 16.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited to
This, anyone skilled in the art in the technical scope disclosed by the present invention, the variation that can readily occur in or replaces
It changes, should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection of claim
Subject to range.
Claims (10)
1. a kind of eddy current testing device of stainless steel jointless short tube surface microscopic defect, which is characterized in that including connection plate,
Moving leader, rotary stopper plate, compressed spring, mounting bracket, demountable panel, V-block and vortex flow dot type probe；The connection peace
Loading board is fixedly connected with external drive mechanism；One end of the moving leader passes through the connection plate and is used for the shifting
The rotary stopper plate of dynamic guide rod downlink limit is fixedly connected, and the other end is fixedly connected with the mounting bracket；The compression
Spring pocket is connected to the rotary stopper plate in the connection plate on the moving leader, to press；It is described can
Stripper is detachably installed with the mounting bracket and is connect；The V-block and the demountable panel and the mounting bracket rotate
Connection；The bottom of the V-block has V-groove；The vortex flow dot type probe is located at the central area of the V-block, and face
The bottom of the V-groove be arranged outward；The V-groove is for detent on the surface of detected stainless steel jointless short tube.
2. a kind of eddy current testing device of stainless steel jointless short tube surface according to claim 1 microscopic defect, feature
It is, including linear bearing, the top of the linear bearing is cylindrical structure, and lower part is flange end cap；The cylindrical structure is convex
It protrudes into the connection plate, the flange end cap is fixedly connected with the connection plate；The moving leader includes certainly
Coaxially formed upper section guide rod, middle section guide rod and lower section guide rod under above, and the radius of the middle section guide rod is greater than the upper section and leads
The radius of bar and the lower section guide rod；The cylindrical structure and the connection plate are sequentially passed through at the top of the upper section guide rod
It is fixedly connected with the rotary stopper plate；The compressed spring covers on the upper section guide rod, and upper end is connected to the flange
On end cap, lower end is connected on the upper shaft shoulder of the middle section guide rod；The mounting bracket is equipped with guide rod installing hole, the lower section
Guide rod is mounted in the guide rod installing hole；The lower shaft shoulder of the middle section guide rod and the mounting bracket axially position.
3. a kind of eddy current testing device of stainless steel jointless short tube surface according to claim 2 microscopic defect, feature
It is, a tightening screw hole is vertical and interconnected with the guide rod installing hole；The side ream of the lower section guide rod is flat, is used for tightening
Screw passes through the fixed lower section guide rod of the tightening screw hole.
4. a kind of eddy current testing device of stainless steel jointless short tube surface according to claim 2 microscopic defect, feature
It is, the rotary stopper plate includes horizontal segment and vertical section, and the two forms L-type structure；The horizontal segment passes through connection positioning
Bolt is connect with the screw top of the upper section guide rod, and right angle groove of the vertical section in the connection plate makees straight line
It is mobile, and not can be rotated.
5. according to claim 1 to a kind of vortex inspection of stainless steel jointless short tube surface microscopic defect described in one of any in 4
Survey device, which is characterized in that stepped hole is offered in the symmetric position of the demountable panel and the mounting bracket respectively, it is described
Miniature self-aligning ball bearing is installed, the two sides of the V-block pass through the miniature aligning of rotation axis and two sides respectively on stepped hole
Ball bearing connection.
6. a kind of eddy current testing device of stainless steel jointless short tube surface according to claim 5 microscopic defect, feature
It is, the mounting bracket or the demountable panel are equipped with arc groove, and the corresponding side of the V-block is equipped with rotary stopper
Axis, the rotary stopper axis cooperates with the arc groove excessively to be rotated with limiting the V-block.
7. a kind of eddy current testing device of stainless steel jointless short tube surface according to claim 6 microscopic defect, feature
It is, two extension springs is connected between the mounting bracket and the V-block；Two extension springs are to make the V
Type block restores to initial equilibrium conditions.
8. a kind of eddy current testing device of stainless steel jointless short tube surface according to claim 7 microscopic defect, feature
It is, the extension spring is buckle helical spring.
9. a kind of eddy current testing device of stainless steel jointless short tube surface according to claim 1 microscopic defect, feature
It is, the central area of the V-block is provided with through-hole；It is cased with that elastic clip is fixed, and the two is installed on the vortex flow dot type probe
In the through-hole, and it is fixed by holding screw to hold out against the elastic clip.
10. a kind of eddy current testing device of stainless steel jointless short tube surface according to claim 9 microscopic defect, feature
It is, the elastic clamping, which is put on, is equipped with opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613801.3A CN108828061B (en) | 2018-06-14 | 2018-06-14 | Eddy current detection device for surface micro-defects of stainless steel seamless short pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613801.3A CN108828061B (en) | 2018-06-14 | 2018-06-14 | Eddy current detection device for surface micro-defects of stainless steel seamless short pipe |
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| CN108828061B CN108828061B (en) | 2022-05-27 |
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| CN110988120A (en) * | 2019-11-05 | 2020-04-10 | 上海应用技术大学 | Ultrasonic online flaw detection device for weld defects of stainless steel thin-wall round welded pipe |
| CN111024810A (en) * | 2019-11-08 | 2020-04-17 | 上海应用技术大学 | Vortex detection device capable of simultaneously detecting defects of inner wall and outer wall of stainless steel short pipe |
| CN111896613A (en) * | 2020-07-29 | 2020-11-06 | 上海应用技术大学 | Stainless steel flat welded pipe welding seam defect eddy current on-line measuring device |
| CN112305066A (en) * | 2020-10-28 | 2021-02-02 | 电子科技大学 | Independent double-shaft elastic pressing type probe automatic positioning device for eddy current testing |
| CN112858469A (en) * | 2021-01-18 | 2021-05-28 | 杭州意能电力技术有限公司 | Vortex probe clamp device and using method thereof |
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| CN110887895A (en) * | 2019-11-08 | 2020-03-17 | 上海应用技术大学 | Stainless steel square welded tube welding seam eddy current on-line measuring device |
| CN111024810A (en) * | 2019-11-08 | 2020-04-17 | 上海应用技术大学 | Vortex detection device capable of simultaneously detecting defects of inner wall and outer wall of stainless steel short pipe |
| CN111024810B (en) * | 2019-11-08 | 2022-10-14 | 上海应用技术大学 | Eddy current detection device capable of simultaneously detecting defects of inner wall and outer wall of stainless steel short pipe |
| CN111896613A (en) * | 2020-07-29 | 2020-11-06 | 上海应用技术大学 | Stainless steel flat welded pipe welding seam defect eddy current on-line measuring device |
| CN112305066A (en) * | 2020-10-28 | 2021-02-02 | 电子科技大学 | Independent double-shaft elastic pressing type probe automatic positioning device for eddy current testing |
| CN112305066B (en) * | 2020-10-28 | 2023-01-17 | 电子科技大学 | Independent double-shaft elastic pressing type probe automatic positioning device for eddy current testing |
| CN112858469A (en) * | 2021-01-18 | 2021-05-28 | 杭州意能电力技术有限公司 | Vortex probe clamp device and using method thereof |
| CN112946066A (en) * | 2021-02-05 | 2021-06-11 | 内蒙古科技大学 | Surface detection device for revolving body |
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