CN102590354A - Probe for performing ultrasonic detection on internal thread tube - Google Patents
Probe for performing ultrasonic detection on internal thread tube Download PDFInfo
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- CN102590354A CN102590354A CN2012100532057A CN201210053205A CN102590354A CN 102590354 A CN102590354 A CN 102590354A CN 2012100532057 A CN2012100532057 A CN 2012100532057A CN 201210053205 A CN201210053205 A CN 201210053205A CN 102590354 A CN102590354 A CN 102590354A
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Abstract
The invention discloses a probe for performing ultrasonic detection on an internal thread tube. The probe mainly comprises a transverse wave chip, a longitudinal wave chip, a shell, a wedged block, a damping block and a power line interface, wherein an interface of the damping block and the wedged block is of a trapezoid structure; the transverse wave chip is arranged in an inclination manner and positioned on an inclined surface of the trapezoid structure at a mounting angle alpha of sin-1(CT/Cw*sin_beta); and the longitudinal wave chip is arranged horizontally and positioned on the lower horizontal plane of the trapezoid structure. The two chips are combined, namely the transverse wave chip is used for checking a welded joint, and the longitudinal wave chip is used for generating longitudinal waves; due to the change of thickness of the wall of the internal thread tube, a position of a convex rib on the inner wall can be detected precisely; during transverse wave flaw detection, the position is corrected; and therefore, ultrasonic detection for a butted welded joint of the internal thread tube is realized. The probe has a simple structure, and is convenient to use; and shortcomings of the butted welded joint of the internal thread tube can be detected accurately.
Description
Technical field
The invention belongs to equipment carrying out flaw detection equipment technical field, relate to a kind of rifled tube ultrasound examination, be specifically related to the probe that a kind of compressional wave wafer and shear-wave wafer combine with probe.
Background technology
Through strengthening disturbance, can improve the heat transfer coefficient and the thermal efficiency of heat transmission equipment to steam water interface.It is one of effective measures that improve heat transfer coefficient that heat exchange or cooling device use rifled tube, and rifled tube is mostly adopted in the high-temperature region of modern high parameter high capacity thermal power unit boiler water-cooling wall.The irregular internal thread of rifled tube inwall, when ultrasound examination was carried out in the rifled tube butt-weld, whether acoustic beam reflected on screw thread; The sound path of reflection wave is different; Its influence is similar with the even influence that brings of tube wall thickness ununiformity, when using the primary event wave inspection, brings influence can for the location of defective; The horizontal range influence can reach about 2.5mm, and especially the check of butt welded seam top defective brings influence.
How to overcome the influence of internal thread convex tendon, realize to the rifled tube Ultrasonic Testing of Welds it being a technical barrier.
Summary of the invention
For solving above-mentioned technical barrier, the present invention provides a kind of rifled tube ultrasound examination with probe, combines through quarter wave plate 14 in length and breadth, improves the accuracy that rifled tube butt-weld ultrasonic acoustic detects.
Rifled tube ultrasound examination of the present invention mainly is made up of probe wafer, shell, voussoir, damping block and electric source line interface with probe.The probe wafer comprises shear-wave wafer and compressional wave wafer, and shear-wave wafer is connected with the shear wave power interface, and the compressional wave wafer is connected with the compressional wave power interface.Damping block and voussoir interface are trapezium structure, and shear-wave wafer is the installation of tilting, and the installation site is positioned at the inclined-plane of trapezium structure, and the compressional wave wafer is that level is installed, and the installation site is positioned on the lower horizontal plane of trapezium structure.Setting angle α=the sin of shear-wave wafer
-1(C
T/ C
w* C wherein sin β),
TBe the longitudinal wave velocity of wedge of material, C
wBe the transverse wave speed of workpiece material, β is the shear refraction angle in the workpiece.
Shear-wave wafer and compressional wave wafer are polycrystal piezoelectric ceramics-lead zirconate titanate wafer.The sample work piece wall thickness is when 4～8mm, and the frequency of wafer is 5MHz, the 6 * 6mm that is of a size of.Voussoir is the organic glass voussoir.The material of damping block is thiokol and tungsten powder epoxy resin composite material.The material of shell is an aluminium alloy.The distance of shear-wave wafer and compressional wave wafer is 15 ± 3mm.
Rifled tube ultrasound examination of the present invention has following several aspects characteristics with probe:
1, voussoir material chosen
Because ultrasound wave depends on setting angle and the longitudinal wave velocity of entrant sound voussoir of wafer in probe, the material of the definite entrant sound voussoir of needs at the shear refraction angle of steel grade.The present invention selects machine glass entrant sound voussoir for use, because organic glass is suitable at the following attenuation coefficient of frequency of sound wave 5MHz, for the repeatedly reflected energy in the sound trap enough absorptions are arranged, and the coupled characteristic of organic glass and workpiece is good, is easy to processing.
2. design of ultrasound wave chip architecture and parameter are selected
Shear-wave wafer and compressional wave wafer select to have polycrystal piezoelectric ceramics-lead zirconate titanate wafer that good electromechanical coupling factor, piezoelectricity emission ratio and piezoelectricity receive coefficient.
According to snell theorem and trigonometric function relation, the setting angle α of shear-wave wafer 1 in probe can be confirmed by formula (1)
α=sin
-1(C
T/C
w*sinβ) (1)
In the formula: α is the mounting inclination angle of shear-wave wafer in probe, that is the angle of inclination of wafer installation place organic glass;
C
TFor the longitudinal wave velocity of wedge of material, known;
C
wFor the transverse wave speed of workpiece material, known;
β is the shear refraction angle in the workpiece, confirms according to the wall thickness of rifled tube;
For the rifled tube of 4～8mm thickness, β is generally 68 °～71 ° can satisfy the detection requirement, and corresponding setting angle α is 50.8 °～52.2 °.
For accurately measuring the pipe wall thickness, compressional wave wafer plain cloth is put.
Probe wafer size and frequency are except influential to acoustic beam directive property, the acoustic beam half-angle of spread, near field length, and examination scope is detected ability with remote defective also has considerable influence.Through analysis-by-synthesis, for reducing the near field length adverse effect, and consider defect location and quantitative accuracy, should select less wafer size probe for use; Select for use less wafer probe also to help reducing coupling loss simultaneously, improve coupling effect.Because square wafer is compared with garden shape wafer, increased emissive porwer near the workpiece part, can obviously improve sensitivity, so the probe wafer shape adopts square.Take all factors into consideration above-mentioned factor, at 4～8mm, it is the square wafer size probe of 6 * 6mm of 5MHz that two plates is all selected frequency according to the sample work piece wall thickness.
3. the confirming of distance between two plates
Can the phase mutual interference for the vibration that guarantees two plates, the spacing between shear-wave wafer and the wafer compressional wave can not be too little, again can not be too big, to take all factors into consideration, the two plates spacing is confirmed as 15mm ± 3mm.
4. damping block Material Selection
The selection of damping block considers from two aspects, the one, and acoustic impedance is bigger, so that produce bigger damping action; The 2nd, the sound absorption that requirement is stronger sponges wafer emitting sound wave backward as far as possible.Select high polyphosphazene polymer sulphur rubber of receptivity and tungsten powder epoxy resin composite bed as damping and absorbing material for this reason.
Shear-wave wafer of the present invention and compressional wave wafer constitute the rifled tube ultrasound examination with probe, and two wafers are used in combination, and the shear-wave wafer that is in tilted layout produces shear wave; Be responsible for the weld seam of inspection workpiece, the compressional wave wafer of horizontal arrangement produces the variation that compressional wave is responsible for measuring the rifled tube wall thickness, the stationkeeping between two plates; Utilize the variation of the rifled tube wall thickness of compressional wave measurement; Accurately measure the position of inwall convex tendon, and when detection with transversal waves, revise, overcome the influence of internal thread convex tendon; Realization has improved the accuracy that detects to the rifled tube Ultrasonic Testing of Welds.The present invention is simple in structure, and is easy to use, uses the present invention can accurately measure the defective in the rifled tube butt-weld.
Description of drawings
Fig. 1 is the structural representation of rifled tube ultrasound examination of the present invention with probe;
Fig. 2 is an application principle synoptic diagram of the present invention.
Wherein: 1-shear-wave wafer, 2-compressional wave wafer, 3-shear wave power interface, 4-compressional wave power interface, 5-voussoir, 6-damping block, 7-shell, 8---mother metal one, 9---mother metal two, 10-convex tendon two, 11---weld seam, 12-defective, 13-probe, 4-shear wave acoustic beam, 15-compressional wave acoustic beam, 16-convex tendon one.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Rifled tube ultrasound examination of the present invention is with probe, and is as shown in Figure 1, mainly by shear-wave wafer 1, compressional wave wafer 2, shear wave power interface 3, ripple power interface 4, shell 7, voussoir 5 and damping block 6 constitute in length and breadth.Shear-wave wafer and compressional wave wafer are polycrystal piezoelectric ceramics-said shear-wave wafer of lead zirconate titanate wafer, and the frequency of wafer is 5MHz, and dimensions is 6 * 6mm.Shear-wave wafer is connected with shear wave power interface 3, and the compressional wave wafer is connected with compressional wave power interface 4.Voussoir 5 is the organic glass voussoir.The material of damping block 6 is thiokol and tungsten powder epoxy resin composite material.Shell 7 usefulness aluminium alloys are processed.Damping block and voussoir interface are trapezium structure, and shear-wave wafer tilts to install, and the installation site is positioned at the inclined-plane of trapezium structure, and the compressional wave wafer is that level is installed, and the installation site is positioned on the lower horizontal plane of trapezium structure, the setting angle α=sin of shear-wave wafer
-1(C
T/ C
w* C wherein sin β),
TBe the longitudinal wave velocity of wedge of material, C
wTransverse wave speed for workpiece material.β is the shear refraction angle in the workpiece, C
T, C
wFor known, β confirms that according to the wall thickness of rifled tube for the rifled tube of 4～8mm thickness, β is generally 68 °～71 ° can satisfy the detection requirement by the material character decision, and corresponding setting angle α is 50.8 °～52.2 °, and it is 51 ° that present embodiment is selected α for use.The distance of shear-wave wafer and compressional wave wafer is 15mm.
Rifled tube ultrasound examination of the present invention is as shown in Figure 2 with the principle of work of probe; When ultrasonic testing is carried out in the rifled tube butt-weld; Probe 13 is placed on the rifled tube mother metal 1 and/or rifled tube mother metal 29 that is verified, starts power supply and detect.The combination of two probe wafers is used; The shear wave that the shear-wave wafer 1 of front produces is responsible for seam inspection; When having defective 12 in the weld seam 11; Whether have convex tendon 10 exist, promptly be not sure of the wall thickness of fault location mother metal 29 if being not sure of fault location rifled tube inwall from tube outer wall, only can not accurately confirm the particular location of defective 12 in weld seam 11 with a shear-wave wafer.At this moment; The variation that the compressional wave that the compressional wave wafer 2 of back produces is responsible for measuring the rifled tube wall thickness is because the stationkeeping between the two plates can be utilized the variation of the rifled tube wall thickness of compressional wave measurement like this; Accurately measure the position of inwall convex tendon 2 10; Thereby whether the reflection spot of accurately inferring the shear wave secondaries drops on the convex tendon, has got rid of the influence of inwall convex tendon, accomplishes the rifled tube ultrasound detection smoothly.
Claims (7)
1. a rifled tube ultrasound examination is with probe; Mainly constitute by probe wafer, shell (7), voussoir (5), damping block (6) and electric source line interface; It is characterized in that: said probe wafer comprises shear-wave wafer (1) and compressional wave wafer (2); Shear-wave wafer is connected with shear wave power interface (3), and the compressional wave wafer is connected with compressional wave power interface (4); Said damping block and voussoir interface are trapezium structure; Said shear-wave wafer tilts to install, and the installation site is positioned at the inclined-plane of trapezium structure, and said compressional wave wafer is that level is installed; The installation site is positioned on the lower horizontal plane of trapezium structure, the setting angle α=sin of shear-wave wafer
-1(C
T/ C
w* C wherein sin β),
TBe the longitudinal wave velocity of wedge of material, C
wBe the transverse wave speed of workpiece material, β is the shear refraction angle in the workpiece.
2. probe is used in said rifled tube ultrasound examination according to claim 1, and it is characterized in that: said shear-wave wafer and compressional wave wafer are polycrystal piezoelectric ceramics-lead zirconate titanate wafer.
3. use probe according to claim 1 or 2 said rifled tube ultrasound examinations, it is characterized in that: the frequency of said shear-wave wafer and compressional wave wafer is 5MHz, and dimensions is 6 * 6mm.
4. probe is used in said rifled tube ultrasound examination according to claim 1, and it is characterized in that: the material of said damping block (6) is thiokol and tungsten powder epoxy resin composite material.
5. probe is used in said rifled tube ultrasound examination according to claim 1, and it is characterized in that: the material of said shell (7) is an aluminium alloy.
6. ripple probe is in length and breadth used in said rifled tube ultrasound examination according to claim 1, and it is characterized in that: the distance of said shear-wave wafer (1) and compressional wave wafer (2) is 15 ± 3mm.
7. probe is used in said rifled tube ultrasound examination according to claim 1, and it is characterized in that: said voussoir (5) is the organic glass voussoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100532057A CN102590354A (en) | 2012-03-02 | 2012-03-02 | Probe for performing ultrasonic detection on internal thread tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100532057A CN102590354A (en) | 2012-03-02 | 2012-03-02 | Probe for performing ultrasonic detection on internal thread tube |
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| CN102590354A true CN102590354A (en) | 2012-07-18 |
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| CN2012100532057A Pending CN102590354A (en) | 2012-03-02 | 2012-03-02 | Probe for performing ultrasonic detection on internal thread tube |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543160A (en) * | 2013-09-26 | 2014-01-29 | 瑛岛金属（天津）有限公司 | Thread defect detection method |
| CN104977364A (en) * | 2015-07-16 | 2015-10-14 | 常州市常超电子研究所有限公司 | Detachable ultrasonic angle beam probe |
| CN107567585A (en) * | 2015-04-28 | 2018-01-09 | 阿海珐核能公司 | For controlling the component of weld seam by ultrasonic wave |
| CN108414616A (en) * | 2018-02-08 | 2018-08-17 | 中兴海陆工程有限公司 | TMCP steel plate butt weld phased array ultrasonic detecting methods |
| CN108562652A (en) * | 2018-04-04 | 2018-09-21 | 河海大学常州校区 | A kind of sliceable underwater works detection array ultrasonic probe |
| CN109060955A (en) * | 2018-05-28 | 2018-12-21 | 广西电网有限责任公司电力科学研究院 | A kind of breaker energy storage spring ultrasonic guided wave detecting method |
| CN110320275A (en) * | 2019-08-09 | 2019-10-11 | 华中科技大学无锡研究院 | Promote the method and ultrasound detection voussoir of ultrasonic probe sound field effective coverage range |
| CN114295723A (en) * | 2021-12-30 | 2022-04-08 | 中铁检验认证(常州)机车车辆配件检验站有限公司 | Inner hole ultrasonic detection probe and detection method |
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Patent Citations (4)
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Non-Patent Citations (1)
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| 张晓东 等: "小口径薄壁管对接焊缝的超声波探伤", 《黑龙江石油化工》, no. 2, 30 June 1996 (1996-06-30) * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543160A (en) * | 2013-09-26 | 2014-01-29 | 瑛岛金属（天津）有限公司 | Thread defect detection method |
| CN107567585A (en) * | 2015-04-28 | 2018-01-09 | 阿海珐核能公司 | For controlling the component of weld seam by ultrasonic wave |
| CN104977364A (en) * | 2015-07-16 | 2015-10-14 | 常州市常超电子研究所有限公司 | Detachable ultrasonic angle beam probe |
| CN108414616A (en) * | 2018-02-08 | 2018-08-17 | 中兴海陆工程有限公司 | TMCP steel plate butt weld phased array ultrasonic detecting methods |
| CN108562652A (en) * | 2018-04-04 | 2018-09-21 | 河海大学常州校区 | A kind of sliceable underwater works detection array ultrasonic probe |
| CN108562652B (en) * | 2018-04-04 | 2020-11-03 | 河海大学常州校区 | Spliced underwater structure detection array ultrasonic probe |
| CN109060955A (en) * | 2018-05-28 | 2018-12-21 | 广西电网有限责任公司电力科学研究院 | A kind of breaker energy storage spring ultrasonic guided wave detecting method |
| CN109060955B (en) * | 2018-05-28 | 2021-10-08 | 广西电网有限责任公司电力科学研究院 | Ultrasonic guided wave detection method for energy storage spring of circuit breaker |
| CN110320275A (en) * | 2019-08-09 | 2019-10-11 | 华中科技大学无锡研究院 | Promote the method and ultrasound detection voussoir of ultrasonic probe sound field effective coverage range |
| CN114295723A (en) * | 2021-12-30 | 2022-04-08 | 中铁检验认证(常州)机车车辆配件检验站有限公司 | Inner hole ultrasonic detection probe and detection method |
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Owner name: STATE GRID CORPORATION OF CHINA HEBEI ELECTRIC POW Effective date: 20121220 Owner name: HEBEI ELECTRIC POWER CORPORATION ELECTRIC POWER RE Free format text: FORMER OWNER: HEBEI ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20121220 |
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Effective date of registration: 20121220 Address after: 050021 No. 238 South Sports street, Yuhua Road, Hebei, Shijiazhuang Applicant after: Electric Power Research Institute of Hebei Electric Power Corporation Applicant after: State Grid Corporation of China Applicant after: Hebei Electric Power Construction & Adjustment Research Institute Address before: 050021 No. 238 South Sports street, Hebei, Shijiazhuang Applicant before: Hebei Electric Power Research Institute |
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Application publication date: 20120718 |