CN105116057B - Small-bore pipe rolling defect ultrasonic probe and matching used test block - Google Patents
Small-bore pipe rolling defect ultrasonic probe and matching used test block Download PDFInfo
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- CN105116057B CN105116057B CN201510601045.9A CN201510601045A CN105116057B CN 105116057 B CN105116057 B CN 105116057B CN 201510601045 A CN201510601045 A CN 201510601045A CN 105116057 B CN105116057 B CN 105116057B
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Abstract
The invention discloses a kind of small-bore pipe rolling defect ultrasonic probes, it is characterized in that setting probing shell, the inner cavity of probing shell is divided into symmetrical incident chamber and outgoing chamber by sound insulating layer, chip is set in control head shell, chip is the incident chip being located in incident chamber respectively, and the outgoing chip in outgoing chamber, incident chip and outgoing chip structure and performance parameters having the same, and it is symmetrical arranged centered on sound insulating layer, the double crystal probe of one hair of a receipts is constituted with incident chip and outgoing chip, ultrasonic testing signals are generated in tested tube wall by double crystal probe and lead directly to wave echo-signal, ultrasonic testing signals are compared with the detection for realizing small-bore pipe rolling defect with straight-through wave echo-signal.The present invention ensures the accuracy of testing result to realize the fast checking of boiler heating surface upper tube row.
Description
Technical field
The present invention relates to technical field of nondestructive testing, more particularly to a kind of small-bore pipe applied on boiler heating surface rolls
Defect ultrasonic probe processed and matching used test block.
Background technology
Heating surface tubes in boilers rolling defect usually has surface road plan, crackle, folding, sticks up skin, transverse fissure and layering etc., harm
Maximum mainly to have crackle, layering, folding, it directly affects the process industrial art performance of pipe, and threatens the safe handling of pipe
Performance.
Since the ratio T/D of the wall thickness T and diameter D of boiler tubes are usually less than 0.20, tube wall is relatively thin in addition, it is difficult to use
Normal probe or angle probe carry out ultrasound examination with contact method；It is straight probe of single crystal water enchroachment (invasion) generally to use detection method at present
Method or double-crystal normal probe water enchroachment (invasion) method, but such methods detection process is complicated, sensitivity is low, and the pipe of in-service operation can not be discharged into
Row detection.
Invention content
The present invention is to provide a kind of conveniently small-bore pipe to avoid above-mentioned existing deficiencies in the technology
Rolling defect ultrasonic probe and matching used test block to realize the fast checking of boiler heating surface upper tube row, and ensure to examine
Survey the accuracy of result.
The present invention is to solve technical problem to adopt the following technical scheme that：
Small-bore pipe rolling defect ultrasonic probe of the present invention is structurally characterized in that：Probing shell, the probe shell are set
The inner cavity of body is divided into symmetrical incident chamber and outgoing chamber by sound insulating layer, and chip is arranged in the control head shell, described
Chip is the incident chip being located in incident chamber, and the outgoing chip in outgoing chamber respectively, the incidence chip and is gone out
Chip structure and performance parameters having the same are penetrated, and are symmetrical arranged centered on the sound insulating layer, with described incident brilliant
Piece and outgoing chip constitute a double crystal probe for receiving a hair, and ultrasonic testing signals are by the double crystal probe in measured tube
It is generated in tube wall and leads directly to wave echo-signal, it is small that the ultrasonic testing signals are compared with straight-through wave echo-signal with realization
The detection of bore pipe rolling defect.
The design feature of small-bore pipe rolling defect ultrasonic probe of the present invention is lain also in：Existed using the double crystal probe
Tube wall is moved on the outside of measured tube, realizes the defects detection to the full pipe range of measured tube.
The design feature of small-bore pipe rolling defect ultrasonic probe of the present invention is lain also in：The chip is made pottery using lead titanates
Porcelain chip, straight-through wave echo-signal order of reflection in measured tube is 16 times, 14 times, 12 times or 10 times.
Cooperation small-bore pipe rolling defect ultrasonic probe of the present invention realizes that the structure of the sensitivity adjustment test block of detection is special
Putting is：The sensitivity adjustment test block is divided on the madial wall and lateral wall of the pipe fitting using #20 carbon steels as the pipe fitting of material
It is not machined with axial groove, the V-shaped V slots in the cross section of the axial groove, the flute length of axial groove is identical, groove depth in different test blocks
It is incremented by by 0.5mm in the range of setting.
Cooperation small-bore pipe rolling defect ultrasonic probe of the present invention realizes the design feature of the structural adjustment test block of detection
It is：The structural adjustment test block is using #20 carbon steels as the plate of material, and one end of plate is the arc-shaped edges that radius of curvature is r, circle
The arc length of arc side is π r, and r is the exradius of measured tube；The other end of plate is the involute side that radius of curvature is R, and
There is R>R is provided with the through-hole of a diameter of 1mm of perforation panel thickness in the plate.
Compared with the prior art, the present invention has the beneficial effect that：The invention belongs to ultrasound examination principles, are received using one
One hair double crystal probe leads directly to wave principle, and probe is in direct contact on heating surface tubes in boilers and carries out scanning and realizes online inspection
It surveys, defect is judged according to the attenuation of straight-through wave, can realize that the fast checking of pipe row, testing result are accurate and reliable.
Description of the drawings
Fig. 1 a, Fig. 1 b and Fig. 1 c are detection principle diagram of the present invention；
Fig. 2 is incidence angle schematic diagram calculation of popping one's head in the present invention；
Fig. 3 a and Fig. 3 b are respectively the vertical profile and sectional schematic diagram of medium sensitivity adjustment test block of the present invention；
Fig. 4 a and Fig. 4 b are respectively the main view and schematic side view of structural adjustment test block in the present invention；
Fig. 5 is sonde configuration schematic diagram of the present invention；
Figure label：1 chip, 2 measured tubes, 3 sensitivity adjustment test blocks, 4 structural adjustment test blocks, 5 inner wall grooves, 6 outer wall grooves,
7 be V slots, 8 through-holes, 9 probing shells, 10 sound insulating layers, 11 jet water spouts.
Specific implementation mode
Referring to Fig. 5, the structure type of small-bore pipe rolling defect ultrasonic probe is in the present embodiment：Probing shell is set
9, the inner cavity of probing shell 9 is divided into symmetrical incident chamber and outgoing chamber by sound insulating layer 10, is arranged in control head shell brilliant
Piece 1, chip 1 are the incident chip being located in incident chamber, and the outgoing chip in outgoing chamber respectively, incident chip and are gone out
Chip structure and performance parameters having the same are penetrated, and are symmetrical arranged centered on sound insulating layer 10, with the incident chip
With outgoing chip constitute one receive one hair double crystal probe, ultrasonic testing signals by double crystal probe measured tube 2 pipe
It is generated in wall and leads directly to wave echo-signal, realization small-bore pipe is compared with straight-through wave echo-signal for ultrasonic testing signals
The detection of rolling defect is moved using double crystal probe on the outside tube wall of measured tube 2, is realized to the complete of measured tube 2
The defects detection of pipe range.
Chip 1 uses lead titanate ceramics chip, straight-through wave echo-signal order of reflection in measured tube 2 to could be provided as 16
It is secondary, 14 times, 12 times or 10 times.
Referring to Fig. 3 a and Fig. 3 b, small-bore pipe rolling defect ultrasonic probe is coordinated to realize the sensitive of detection in the present embodiment
Degree adjustment test block 3 is to be machined with axial groove respectively on the madial wall and lateral wall of pipe fitting using #20 carbon steels as the pipe fitting of material,
Inner wall groove 5 as shown in fig. 3a and outer wall groove 6, as shown in Figure 3b, axial groove are the V-shaped V slots 7 in cross section, different test blocks
The flute length of middle axial groove is that identical, groove depth is incremented by the range of setting by 0.5mm；Sensitivity adjustment test block 3 is visited for measuring
Survey sensitivity.
Referring to Fig. 4 a and Fig. 4 b, cooperation small-bore pipe rolling defect ultrasonic probe realizes the structure of detection in the present embodiment
Adjustment test block 4 is using #20 carbon steels as the plate of material, and one end of plate is the arc-shaped edges that radius of curvature is r, the circular arc of arc-shaped edges
Length is π r, and r is the exradius of measured tube；The other end of plate is the involute side that radius of curvature is R, and has R>R, in plate
The through-hole 8 of a diameter of 1mm of perforation panel thickness is provided in part；Structural adjustment test block is processed into inner concave arc surface for measuring
Incidence point, refraction angle and the sweep speed of probe.
Fig. 1 a, Fig. 1 b and Fig. 1 c show testing principle of the present invention, and measured tube 2 shown in Fig. 1 a does not have defect, ultrasound
Wave detects signal and is reflected for zero defect, and Fig. 1 b show measured tube 2 because there are rolling defects, Gu and there is reflection echo disappearance,
Fig. 1 c are that there are rolling defect, echo attenutations for measured tube.
In detection process, water-filling is carried out into probing shell 9 using jet water spout 11, is formed in the measured surface of measured tube 2
Moisture film so that pop one's head in and have good couple between measured tube.Fig. 2 shows the position relationships of incident angle α and refraction angle β, surpass
The frequency of sonic detection signal is selected as 2.5~5MHz, and suitable incident angle α and refraction angle β ranges is arranged, and makes straight-through wave echo
Signal order of reflection in measured tube is 16 times, 14 times, 12 times or 10 times, and to ensure detection sensitivity, order of reflection is more,
Defect is bigger to the influence for leading directly to wave, such as：Ultrasonic wave is relatively straight-through in the probe that Guan Gangzhong order of reflection is 16 times and 14 times
Wave maximum attenuation value is compared with 12 times and 10 biggers.
Using digitalized ultrasonic wave instrument, control sweep speed, the dynamic change situation for leading directly to wave is observed, it is various different anti-
Penetrating the probe of number specification, it will not to the minimum rate decrement and maximum rate decrement that lead directly to wave when detecting the same defect
Together.It is therefore possible to use the probe of different size is compared detection analysis, accurately and effectively defects detection can be come out
It it is 16 times, 14 times, 12 times and 10 times using order of reflection is respectively formed by taking the measured tube of 57 × 8mm of Φ as an example
Four kinds of probes, it is contemplated that the mismachining tolerance of probe, each probe make two and are tested, by four kinds in steel pipe it is different anti-
Penetrate eight of number probes it is same do not tested on defective pipe.
By test as can be seen that although probe is there are certain mismachining tolerance, the probe of specification of the same race leads directly to wavefront
Change waveform and late wave afterwards is substantially close.In actual detection be by observation lead directly to wave by defect influence degree come to pipe
Sub- rolling defect is judged, identifies that leading directly to wave has following two conditions：It is visited using digitalized ultrasonic wave instrument, correct adjustment
The sweep speed of head；The sound path of straight-through wave is precomputed according to the relevant parameter of probe, is then shown on instrument according to probe
The straight-through wave waveform of the corresponding sound path shown is judged.
In the probe of four kinds of specifications：Ultrasonic wave is more in Guan Gangzhong order of reflection, and defect is bigger to the influence for leading directly to wave；It is super
Sound wave is more in the few few and late wave of deformation wave in straight-through wavefront of Guan Gangzhong order of reflection, and ultrasonic wave is in Guan Gangzhong reflections time
Number it is more more than the deformation wave of straight-through wavefront and late wave is less.
It on the basis of identifying and determining straight-through wave, is tested in sensitivity adjustment test block, test shows various spies
For head when testing the cutting of various different depths, different degrees of decaying will occur in straight-through wave.
Structural adjustment test block is used to carry out testing and debugging to incidence point, refraction angle and sweep speed.Wherein, radius of curvature is
The involute side of R is both the measurement reflecting surface of incidence point and the surface of emission of sweep speed adjustment, corresponding to the center of circle of R radiuses
Surface location is the position of incidence point, and through-hole is for measuring refraction angle and adjustment instrument sweep speed, the center of circle selection of through-hole
On the circular arc line that radius is r.
It is detected present invention is particularly suitable for the small-bore pipe rolling defect for Φ 32mm~Φ 89mm.
Claims (5)
1. a kind of small-bore pipe rolling defect ultrasonic probe, it is characterized in that：Probing shell, the inner cavity of the probing shell are set
Symmetrical incident chamber and outgoing chamber are divided by sound insulating layer, chip, the chip difference are set in the probing shell
It is the incident chip being located in incident chamber, and positioned at the outgoing chip being emitted in chamber, the incidence chip and outgoing chip tool
It has identical structure and performance parameters, and is symmetrical arranged centered on the sound insulating layer, with the incident chip and outgoing
Chip constitutes a double crystal probe for receiving a hair, and ultrasonic testing signals are produced by the double crystal probe in tested tube wall
Raw straight-through wave echo-signal is compared the ultrasonic testing signals with straight-through wave echo-signal and realizes that small-bore pipe rolls
The detection of defect processed；
Suitable incident angle α and refraction angle β ranges are set, straight-through wave echo-signal order of reflection in measured tube is made to be 16 times,
14 times, 12 times or 10 times；The probe of various difference order of reflection specifications its minimum to straight-through wave when detect the same defect
Rate is reduced and maximum rate decrement will be different；Detection analysis is compared using the probe of different size, it can be with accurate and effective
Defects detection is come out.
2. small-bore pipe rolling defect ultrasonic probe according to claim 1, it is characterized in that：It is visited using the twin lamella
Head tube wall on the outside of measured tube is moved, and realizes the defects detection to the full pipe range of measured tube.
3. small-bore pipe rolling defect ultrasonic probe according to claim 1, it is characterized in that：The chip uses metatitanic acid
Lead ceramic wafers.
4. small-bore pipe rolling defect ultrasonic probe described in a kind of cooperation claim 1 realizes the sensitivity adjustment examination of detection
Block, it is characterized in that：The sensitivity adjustment test block is using #20 carbon steels as the pipe fitting of material, in the madial wall of the pipe fitting and outer
It is machined with axial groove on side wall respectively, the V-shaped V slots in the cross section of the axial groove, the flute length of axial groove is in different test blocks
Identical, groove depth is incremented by the range of setting by 0.5mm.
5. small-bore pipe rolling defect ultrasonic probe described in a kind of cooperation claim 1 realizes the structural adjustment test block of detection,
It is characterized in that：The structural adjustment test block is using #20 carbon steels as the plate of material, and one end of plate is the circle that radius of curvature is r
The arc length of arc side, arc-shaped edges is π r, and r is the exradius of measured tube；The other end of plate is that radius of curvature is gradually opening for R
Line side, and have R>R is provided with the through-hole of a diameter of 1mm of perforation panel thickness in the plate.
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| CN201510601045.9A CN105116057B (en) | 2015-09-18 | 2015-09-18 | Small-bore pipe rolling defect ultrasonic probe and matching used test block |
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| CN201510601045.9A CN105116057B (en) | 2015-09-18 | 2015-09-18 | Small-bore pipe rolling defect ultrasonic probe and matching used test block |
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| CN105116057B true CN105116057B (en) | 2018-11-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7318617B2 (en) | 2020-09-23 | 2023-08-01 | Ｊｆｅスチール株式会社 | Ultrasonic flaw detection method for tubular test object |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709211A (en) * | 2017-10-26 | 2019-05-03 | 南京驰新科技有限责任公司 | The detection method of SECTION TUBE FOR HYDROGEN MANNU-FACTURING FURNACE boiler tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2497312Y (en) * | 2001-09-24 | 2002-06-26 | 宝山钢铁股份有限公司 | Two-way angle probe of supersonic flaw-detection for steel pipe |
| CN101413927A (en) * | 2008-09-02 | 2009-04-22 | 周南岐 | Double-inclined transducer |
| CN201429590Y (en) * | 2009-07-28 | 2010-03-24 | 河北省电力研究院 | Special test block for ultrasonic flaw detection |
| CN201464434U (en) * | 2009-07-28 | 2010-05-12 | 河北省电力研究院 | Special test block for ultrasonic defect detection pipe bend |
| CN101806779A (en) * | 2010-04-30 | 2010-08-18 | 符丰 | Method for calibrating small-diameter probe for ultrasonic flaw detector |
| CN202837250U (en) * | 2012-10-17 | 2013-03-27 | 武汉钢铁(集团)公司 | Bi-wafer ultrasonic flaw detection probe |
| CN205015313U (en) * | 2015-09-18 | 2016-02-03 | 安徽省特种设备检测院 | Small -bore pipe rolling defect ultrasonic transducer and supporting test block of using |
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Cited By (1)
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| JP7318617B2 (en) | 2020-09-23 | 2023-08-01 | Ｊｆｅスチール株式会社 | Ultrasonic flaw detection method for tubular test object |
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