CN205015313U - Small -bore pipe rolling defect ultrasonic transducer and supporting test block of using - Google Patents
Small -bore pipe rolling defect ultrasonic transducer and supporting test block of using Download PDFInfo
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- CN205015313U CN205015313U CN201520734181.0U CN201520734181U CN205015313U CN 205015313 U CN205015313 U CN 205015313U CN 201520734181 U CN201520734181 U CN 201520734181U CN 205015313 U CN205015313 U CN 205015313U
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Abstract
The utility model discloses a small -bore pipe rolling defect ultrasonic transducer and supporting test block of using, characterized by sets up the probe casing, incident chamber and the outgoing chamber that is bilateral symmetry is separated to the inner chamber of probe casing by the sound insulating layer, set up the wafer in the probe casing, the wafer branch maybe be arranged in the incident wafer in incident chamber, and be arranged in the outgoing wafer in outgoing chamber, incident wafer and outgoing wafer have the same structure and performance parameter, and use the sound insulating layer as the central symmetry setting, constitute a double crystal probe who receives with incident wafer and outgoing wafer, the ultrasonic detection signal passes through double crystal probe and produce direct ripples echo signal in being surveyed the pipe pipe wall, carry out the detection that the comparison realized small -bore pipe rolling defect to the ultrasonic detection signal with direct ripples echo signal. The utility model discloses boiler heating surface goes up sweeping fast of the bank of tubes and looks into in order to realize to guarantee the accuracy of testing result.
Description
Technical field
The utility model relates to technical field of nondestructive testing, is particularly a kind ofly applied in small-bore pipe rolling defect ultrasonic probe on boiler heating surface and matching used test block.
Background technology
Heating surface tubes in boilers rolling defect usually has surperficial road plan, crackle, folding, sticks up skin, transverse fissure and layering etc., and what its harm was maximum mainly contains crackle, layering, folding, and it directly affects the process industrial art performance of pipe, and threatens the safe application performance of pipe.
Because the wall thickness T of boiler tubes and the ratio T/D of diameter D are less than 0.20 usually, tube wall is thinner in addition, is difficult to adopt normal probe or angle probe to carry out ultrasound examination with contact method; Generally adopt detection method to be straight probe of single crystal water enchroachment (invasion) method or double-crystal normal probe water enchroachment (invasion) method at present, but this class methods detection process is complicated, sensitivity is low, and cannot detects the pipe row of in-service operation.
Utility model content
The utility model is the weak point for avoiding existing for above-mentioned prior art, one conveniently small-bore pipe rolling defect ultrasonic probe and matching used test block is provided, to realize the fast checking of pipe row on boiler heating surface, and ensure the accuracy of testing result.
The utility model is that technical solution problem adopts following technical scheme:
The design feature of the utility model small-bore pipe rolling defect ultrasonic probe is: arrange probing shell, the inner chamber of described probing shell is divided into symmetrical incident chamber and outgoing chamber by sound insulating layer, in described probing shell, wafer is set, described wafer is the incident wafer being arranged in incident chamber respectively, and be arranged in the outgoing wafer in outgoing chamber, described incident wafer and outgoing wafer have identical structure and performance parameters, and be symmetrical arranged centered by described sound insulating layer, the double crystal probe that one receives one is formed with described incident wafer and outgoing wafer, ultrasonic testing signals produces straight-through ripple echoed signal by described double crystal probe in measured tube tube wall, the detection realizing small-bore pipe rolling defect is compared for described ultrasonic testing signals and straight-through ripple echoed signal.
The design feature of the utility model small-bore pipe rolling defect ultrasonic probe is also: utilize described double crystal probe tube wall outside measured tube to move, realize the defects detection of the full pipe range to measured tube.
The design feature of the utility model small-bore pipe rolling defect ultrasonic probe is also: described wafer adopts lead titanate ceramics wafer, and described straight-through ripple echoed signal order of reflection in measured tube is 16 times, 14 times, 12 times or 10 times.
The design feature coordinating the utility model small-bore pipe rolling defect ultrasonic probe to realize the sensitivity adjustment test block detected is: the pipe fitting that described sensitivity adjustment test block is is material with #20 carbon steel, the madial wall and lateral wall of described pipe fitting are processed with axial groove respectively, the V groove that the transversal section of described axial groove is V-shaped, in different test block, the flute length of axial groove is that identical, groove depth increases progressively by 0.5mm in the scope of setting.
The design feature coordinating the utility model small-bore pipe rolling defect ultrasonic probe to realize the structural adjustment test block detected is: the plate that described structural adjustment test block is is material with #20 carbon steel, the arc-shaped edges of to be radius-of-curvature be in one end of plate r, the exradius of the arc length of arc-shaped edges to be π r, r be measured tube; The involute urve limit of the other end of plate to be radius-of-curvature be R, and have R>r, the diameter being provided with through panel thickness in described plate is the through hole of 1mm.
Compared with the prior art, the utility model beneficial effect is embodied in: the utility model belongs to ultrasound examination principle, receipts double crystal probe is utilized to lead directly to ripple principle, probe is in direct contact with and heating surface tubes in boilers carries out scanning and realizes on-line checkingi, attenuation according to straight-through ripple judges defect, can realize the fast checking of pipe row, testing result accurately and reliably.
Accompanying drawing explanation
Fig. 1 a, Fig. 1 b and Fig. 1 c are the utility model Cleaning Principle figure;
Fig. 2 is incident angle schematic diagram calculation of popping one's head in the utility model;
Fig. 3 a and Fig. 3 b is respectively vertical profile and the sectional schematic diagram of the utility model medium sensitivity adjustment test block;
The master that Fig. 4 a and Fig. 4 b is respectively structural adjustment test block in the utility model looks and schematic side view;
Fig. 5 is the utility model sonde configuration schematic diagram;
Number in the figure: 1 wafer, 2 measured tubes, 3 sensitivity adjustment test blocks, 4 structural adjustment test blocks, 5 inner wall grooves, 6 outer wall grooves, 7 is V groove, 8 through holes, 9 probing shells, 10 sound insulating layers, 11 jet water spouts.
Embodiment
See Fig. 5, in the present embodiment, the version of small-bore pipe rolling defect ultrasonic probe is: arrange probing shell 9, the inner chamber of probing shell 9 is divided into symmetrical incident chamber and outgoing chamber by sound insulating layer 10, wafer 1 is set in probing shell, wafer 1 is the incident wafer being arranged in incident chamber respectively, and be arranged in the outgoing wafer in outgoing chamber, incident wafer and outgoing wafer have identical structure and performance parameters, and be symmetrical arranged centered by sound insulating layer 10, the double crystal probe that one receives one is formed with described incident wafer and outgoing wafer, ultrasonic testing signals produces straight-through ripple echoed signal by double crystal probe in the tube wall of measured tube 2, the detection realizing small-bore pipe rolling defect is compared for ultrasonic testing signals and straight-through ripple echoed signal, double crystal probe is utilized to move on the outside tube wall of measured tube 2, realize the defects detection to the full pipe range of measured tube 2.
Wafer 1 adopts lead titanate ceramics wafer, and straight-through ripple echoed signal order of reflection in measured tube 2 can be set to 16 times, 14 times, 12 times or 10 times.
See Fig. 3 a and Fig. 3 b, the pipe fitting that the sensitivity adjustment test block 3 coordinating small-bore pipe rolling defect ultrasonic probe to realize detecting in the present embodiment is is material with #20 carbon steel, the madial wall and lateral wall of pipe fitting are processed with axial groove respectively, inner wall groove 5 as shown in fig. 3a and outer wall groove 6, as shown in Figure 3 b, axial groove is the V-shaped V groove 7 in transversal section, and in different test block, the flute length of axial groove is that identical, groove depth increases progressively by 0.5mm in the scope of setting; Sensitivity adjustment test block 3 is for measuring detection sensitivity.
See Fig. 4 a and Fig. 4 b, the plate that the structural adjustment test block 4 coordinating small-bore pipe rolling defect ultrasonic probe to realize detecting in the present embodiment is is material with #20 carbon steel, the arc-shaped edges of to be radius-of-curvature be in one end of plate r, the exradius of the arc length of arc-shaped edges to be π r, r be measured tube; The involute urve limit of the other end of plate to be radius-of-curvature be R, and have R>r, the diameter being provided with through panel thickness in plate is the through hole 8 of 1mm; Structural adjustment test block is for measuring the incidence point of the probe being processed into inner concave arc surface, refraction angle and sweep velocity.
Fig. 1 a, Fig. 1 b and Fig. 1 c show the utility model Cleaning Principle, shown in Fig. 1 a, measured tube 2 does not have defect, its ultrasonic testing signals is zero defect reflection, Fig. 1 b is depicted as measured tube 2 because having rolling defect, Gu and have reflection echo to disappear, Fig. 1 c is that measured tube has rolling defect, echo attenutation.
In testing process, utilize jet water spout 11 to carry out water-filling in probing shell 9, form moisture film at the measured surface of measured tube 2, make probe and between measured tube, have good being coupled.Fig. 2 shows the position relationship of incident angle α and refraction angle β, the He Ne laser of ultrasonic testing signals is 2.5 ~ 5MHz, suitable incident angle α and refraction angle β scope are set, straight-through ripple echoed signal order of reflection in measured tube is made to be 16 times, 14 times, 12 times or 10 times, thus guarantee detection sensitivity, order of reflection is more, the impact of defect on straight-through ripple is larger, such as: ultrasound wave Guan Gangzhong order of reflection be 16 straight-through ripple maximum attenuation values relative to the probe of 14 times than 12 times and 10 times larger.
Adopt digitalized ultrasonic ripple instrument, gated sweep speed, observe the dynamic change situation of straight-through ripple, the probe of various different order of reflection specification when detecting same defect it to the minimum rate decrement of straight-through ripple and maximum rate decrement by different.Therefore, the probe of different size can be adopted to compare detection analysis, can accurately and effectively by defects detection out
For the measured tube of Φ 57 × 8mm, utilize and form four kinds of probes that order of reflection is 16 times, 14 times, 12 times and 10 times respectively, consider the mismachining tolerance of probe, the making two of often kind of probe is only tested, by eight of four kinds of order of reflection different in steel pipe probes same do not have on defective pipe test.
Can be found out by test, although probe exists certain mismachining tolerance, it is substantially close with late ripple that the probe of specification of the same race leads directly to the change waveform after wavefront.Being by the influence degree of defect, pipe rolling defect is judged by observing straight-through ripple when actual detection, identifying that straight-through ripple possesses following two conditions: the sweep velocity using digitalized ultrasonic ripple instrument, Correctly adjust probe; Precompute the sound path of straight-through ripple according to the correlation parameter of probe, then judge according to the straight-through waveform of the corresponding sound path shown on instrument of popping one's head in.
In the probe of four kinds of specifications: ultrasound wave is more at Guan Gangzhong order of reflection, the impact of defect on straight-through ripple is larger; Ultrasound wave is few more at the few and late ripple of the deformation wave of straight-through wavefront of Guan Gangzhong order of reflection, and ultrasound wave is many less at the many and late ripples of the deformation wave of straight-through wavefront of Guan Gangzhong order of reflection.
Identifying and determining, on the basis of straight-through ripple, sensitivity adjustment test block to be tested, test shows that various probe is when testing the cutting of various different depth, and decay in various degree will appear in straight-through ripple.
Structural adjustment test block is used for carrying out testing and debugging to incidence point, refraction angle and sweep velocity.Wherein, the mensuration reflecting surface of radius-of-curvature to be the involute urve limit of R be incidence point, also be the surface of emission of sweep velocity adjustment, surface location corresponding to the center of circle of R radius is the position of incidence point, through hole is used to measure refraction angle and adjustment instrument sweep velocity, and the center of circle of through hole is selected on the circular arc line that radius is r.
The utility model is particularly suited for detecting for the small-bore pipe rolling defect of Φ 32mm ~ Φ 89mm.
Claims (4)
1. a small-bore pipe rolling defect ultrasonic probe, it is characterized in that: probing shell is set, the inner chamber of described probing shell is divided into symmetrical incident chamber and outgoing chamber by sound insulating layer, in described probing shell, wafer is set, described wafer is the incident wafer being arranged in incident chamber respectively, and be arranged in the outgoing wafer in outgoing chamber, described incident wafer and outgoing wafer have identical structure and performance parameters, and be symmetrical arranged centered by described sound insulating layer, the double crystal probe that one receives one is formed with described incident wafer and outgoing wafer, ultrasonic testing signals produces straight-through ripple echoed signal by described double crystal probe in measured tube tube wall, the detection realizing small-bore pipe rolling defect is compared for described ultrasonic testing signals and straight-through ripple echoed signal.
2. small-bore pipe rolling defect ultrasonic probe according to claim 1, is characterized in that: utilize described double crystal probe tube wall outside measured tube to move, realize the defects detection of the full pipe range to measured tube.
3. small-bore pipe rolling defect ultrasonic probe according to claim 1, is characterized in that: described wafer adopts lead titanate ceramics wafer, and described straight-through ripple echoed signal order of reflection in measured tube is 16 times, 14 times, 12 times or 10 times.
4. one kind coordinates small-bore pipe rolling defect ultrasonic probe described in claim 1 to realize the sensitivity adjustment test block detected, it is characterized in that: the pipe fitting that described sensitivity adjustment test block is is material with #20 carbon steel, the madial wall and lateral wall of described pipe fitting are processed with axial groove respectively, the V groove that the transversal section of described axial groove is V-shaped, in different test block, the flute length of axial groove is that identical, groove depth increases progressively by 0.5mm in the scope of setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520734181.0U CN205015313U (en) | 2015-09-18 | 2015-09-18 | Small -bore pipe rolling defect ultrasonic transducer and supporting test block of using |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520734181.0U CN205015313U (en) | 2015-09-18 | 2015-09-18 | Small -bore pipe rolling defect ultrasonic transducer and supporting test block of using |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521064383.5U Division CN205353020U (en) | 2015-09-18 | 2015-09-18 | Small -bore pipe rolling defect ultrasonic wave detecting device |
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| CN205015313U true CN205015313U (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520734181.0U Withdrawn - After Issue CN205015313U (en) | 2015-09-18 | 2015-09-18 | Small -bore pipe rolling defect ultrasonic transducer and supporting test block of using |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116057A (en) * | 2015-09-18 | 2015-12-02 | 安徽省特种设备检测院 | Ultrasonic probe for detecting rolling defects of small-bore pipes and test block used with ultrasonic probe |
| CN112305073A (en) * | 2020-10-26 | 2021-02-02 | 西安热工研究院有限公司 | Ultrasonic detection method for crack of sliding pair weld toe of boiler heated surface pipe |
-
2015
- 2015-09-18 CN CN201520734181.0U patent/CN205015313U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116057A (en) * | 2015-09-18 | 2015-12-02 | 安徽省特种设备检测院 | Ultrasonic probe for detecting rolling defects of small-bore pipes and test block used with ultrasonic probe |
| CN112305073A (en) * | 2020-10-26 | 2021-02-02 | 西安热工研究院有限公司 | Ultrasonic detection method for crack of sliding pair weld toe of boiler heated surface pipe |
| CN112305073B (en) * | 2020-10-26 | 2024-01-19 | 西安热工研究院有限公司 | Ultrasonic detection method for weld toe cracks of sliding pair of boiler heating surface pipe |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160203 Effective date of abandoning: 20181106 |
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| AV01 | Patent right actively abandoned |