JPH0513465B2 - - Google Patents
Info
- Publication number
- JPH0513465B2 JPH0513465B2 JP60169724A JP16972485A JPH0513465B2 JP H0513465 B2 JPH0513465 B2 JP H0513465B2 JP 60169724 A JP60169724 A JP 60169724A JP 16972485 A JP16972485 A JP 16972485A JP H0513465 B2 JPH0513465 B2 JP H0513465B2
- Authority
- JP
- Japan
- Prior art keywords
- shoe
- vibrator
- probe
- pipe
- ultrasonic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000523 sample Substances 0.000 claims description 20
- 239000011358 absorbing material Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 238000007689 inspection Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000001028 reflection method Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、超音波により物体中の傷を検査する
超音波探傷器において、超音波の送信、反射波の
受信を行なう探触子に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a probe that transmits ultrasonic waves and receives reflected waves in an ultrasonic flaw detector that uses ultrasonic waves to inspect flaws in objects.
（従来技術）
超音波探傷器には、透過方式と反射方式の２種
があるが、このうち反射方式とは超音波のパルス
を被検査物に入射させ、その反射波ほ状況により
被検査物の傷を検査するものである。(Prior art) There are two types of ultrasonic flaw detectors: a transmission method and a reflection method. Of these, the reflection method involves injecting ultrasonic pulses into the object to be inspected, and depending on the state of the reflected waves, the This test is for inspecting for scratches.
超音波探傷器において、超音波のパルスの送
信、反射波の受信をおこなうものが探触子であ
る。電気的パルスを探触子に送り、探触子に内蔵
された振動子で電気的パルスを超音波パルスに変
換して被検査物に送る。そして、反射して戻つた
反射波は振動子によつて電圧に変換され、増幅さ
れ、その時間的変化がブラウン管上に表示され
る。 In an ultrasonic flaw detector, the probe is what transmits ultrasonic pulses and receives reflected waves. Electrical pulses are sent to the probe, and a transducer built into the probe converts the electrical pulses into ultrasonic pulses, which are then sent to the object to be inspected. The reflected waves that are reflected back are converted into voltage by a vibrator and amplified, and the temporal changes are displayed on a cathode ray tube.
この超音波探傷器により検査する対象として、
ブラント等における配管がある。この配管中の傷
を検査する場合、従来では第４図に示すように一
個の探傷子１を用いて、配管２の外側表面３を方
形に何度も軸方向と周方向に往復させながら走査
をしていた。 The objects to be inspected by this ultrasonic flaw detector are:
There is piping in blunts, etc. Conventionally, when inspecting for flaws in the piping, a single flaw detector 1 is used to scan the outer surface 3 of the piping 2 while reciprocating in the axial and circumferential directions many times in a rectangular pattern, as shown in Fig. 4. was doing.
一方、多数の送受波器を配管の周方向に配置し
たマルチ型探触子も公知である。（特開昭58−
95255号公報参照）
更に、多数の振動子を配管の周方向に配置し
た、順次発信させるようにしたマルチ型探触子も
公知である。（実開昭55−167155号公報参照）
（発明が解決しようとする問題点）
しかし、前記一個の探触子１による検査では、
検査時間が長くなつて検査の能率が悪いものとな
り、検査員の熟練度によつては走査漏れとなる部
分が生じるおそれがある等の欠点がある。 On the other hand, a multi-type probe in which a large number of transducers are arranged in the circumferential direction of a pipe is also known. (Unexamined Japanese Patent Publication 1983-
(Refer to Japanese Patent Publication No. 95255) Furthermore, a multi-type probe in which a large number of vibrators are arranged in the circumferential direction of a pipe and emit signals in sequence is also known. (Refer to Japanese Utility Model Application Publication No. 55-167155) (Problems to be solved by the invention) However, in the inspection using the single probe 1,
There are drawbacks such as the longer inspection time, which reduces inspection efficiency, and depending on the skill level of the inspector, there is a risk that some portions may be omitted from scanning.
殊に、原子力プラントでは、検査員の放射線被
爆を最小限にするために、検査時間の低減は非常
に重要なこととなつている。 Particularly in nuclear power plants, reducing inspection time has become extremely important in order to minimize the radiation exposure of inspectors.
又、前記特開昭58−95255号公報及び実開昭55
−167155号公報に示すマルチ型の探触子では１個
をシユーに収納されていないため、走査のための
走行が困難である上、乱反射の影響を受けるおそ
れがあつた。 Also, the above-mentioned Japanese Unexamined Patent Application Publication No. 1983-95255 and Utility Model Application No. 1987-95255
In the multi-type probe disclosed in Japanese Patent No. 167155, one probe is not housed in a shoe, so it is difficult to travel for scanning and there is a risk of being affected by diffused reflection.
本発明は、このような従来の探触子の欠点に鑑
みなされたものである。本発明の目的は、プラン
ト等における配管の傷を検査する場合に検査能率
が良好なものであり、かつ走査漏れとなる部分が
生じる可能性が少ない上、走査のための走行が簡
単であつて乱反射の影響を受けることのない超音
波探傷器の探触子を提供することにある。 The present invention was made in view of the drawbacks of such conventional probes. The purpose of the present invention is to improve inspection efficiency when inspecting flaws in piping in plants, etc., reduce the possibility of scan omissions, and facilitate scanning. An object of the present invention is to provide a probe for an ultrasonic flaw detector that is not affected by diffused reflection.
（問題点を解決するための手段）
前記目的を達成するために、本発明は次のよう
に構成されている。(Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows.
電気振動と機械振動を相互に変換する振動子
と、該振動子が取付られ、かつ配管の探傷面であ
る外側曲面に当てるシユーとを少なくとも有する
超音波探傷器の探触子において、シユーを一個と
し、探傷検査する配管の外側曲面に適合した円弧
状の当接面をシユーに形成し、シユーの上面に配
管の軸線方向に対し斜めの角度を持つ２つの斜面
をシユーの周方向に形成し、一方の斜面の周方向
に振動子を多数個配置し、他方の斜面に多数の溝
状の凹凸よりなるエツジを形成し、該エツジの上
に吸音材が設けられ、前記振動子を適宜の順番で
順次発振させて構成されている。 A probe for an ultrasonic flaw detector that has at least a vibrator that mutually converts electrical vibration and mechanical vibration, and a shoe to which the vibrator is attached and which is applied to an outer curved surface that is the flaw detection surface of the piping, including one shoe. An arc-shaped abutment surface that conforms to the outer curved surface of the pipe to be inspected is formed on the shoe, and two slopes are formed in the circumferential direction of the shoe on the upper surface of the shoe at an angle diagonal to the axial direction of the pipe. , a large number of vibrators are arranged in the circumferential direction of one slope, an edge consisting of a large number of groove-like unevenness is formed on the other slope, a sound absorbing material is provided on the edge, and the vibrator is It is configured to oscillate in sequence.
（実施例）
以下に、本発明の一実施例を第１図ないし第３
図に基づいて説明する。(Example) An example of the present invention will be described below in Figures 1 to 3.
This will be explained based on the diagram.
配管２の外側表面３に当てるアクリル等により
なる一個のシユー４の下面には、配管２の外側曲
面３に適合した円弧状の当接面５が形成されてい
る。シユー４は、全体的に円の半周以下の略円弧
状にされる。 An arcuate contact surface 5 that conforms to the outer curved surface 3 of the pipe 2 is formed on the lower surface of one shoe 4 made of acrylic or the like that contacts the outer surface 3 of the pipe 2 . The shoe 4 has a generally arcuate shape that is less than half the circumference of a circle.
シユー４の上面には、配管２の軸線方向に対し
斜めの角度を持つ２つの斜面６1，６2がシユー４
の周方向に形成されている。この斜面６1，６2の
うち斜面６1には、振動子７がシユー４の周方向
に多数個配置される。振動子７は、電気振動と機
械振動を相互に変換するものであり、水晶、チタ
ン酸バリウム等が用いられる。振動子７はシユー
４の斜面６1に設けられ、配管２の軸線方向に対
して斜めに配置されている。そのため、振動子７
から送られる超音波パルスは配管２に対して斜め
の角度で入射する。超音波パルスを斜めの角度で
入射させるのは、配管２の板厚方向に発生した欠
陥を検出するのに有効だからである。 On the upper surface of the shoe 4, there are two slopes 6 1 and 6 2 that are oblique to the axial direction of the pipe 2.
It is formed in the circumferential direction. A large number of vibrators 7 are arranged on the slope 6 1 of the slopes 6 1 and 6 2 in the circumferential direction of the shoe 4 . The vibrator 7 mutually converts electrical vibration and mechanical vibration, and is made of crystal, barium titanate, or the like. The vibrator 7 is provided on the slope 6 1 of the shoe 4 and is arranged obliquely with respect to the axial direction of the pipe 2 . Therefore, the vibrator 7
The ultrasonic pulses sent from the pipe 2 are incident on the pipe 2 at an oblique angle. The reason why the ultrasonic pulse is incident at an oblique angle is because it is effective for detecting defects occurring in the thickness direction of the pipe 2.
以上のように、本発明では、配管２の検査能率
向上のために、一個のシユー４の周方向に振動子
７を多数個配置するのである。 As described above, in the present invention, in order to improve the efficiency of inspecting the piping 2, a large number of vibrators 7 are arranged in the circumferential direction of one shoe 4.
ある振動子７からの超音波パルスが他の振動子
７のノイズとなつて混入することを避けるように
各振動子７の発振順番は適宜決められ、順次発振
される。 The order of oscillation of each oscillator 7 is appropriately determined so as to prevent ultrasonic pulses from one oscillator 7 from being mixed in as noise from other oscillators 7, and the oscillations are performed sequentially.
振動子７から発射された超音波パルスの一部が
配管２内に入らず表面で反射され反射エコーとな
るが、これがノイズとなつて検査精度上好ましく
ない。この反射エコーが振動子７に戻らないよう
に、シユー４の斜面６2に乱反射用の多数の溝上
の凹凸よりなるエツジ８が形成され、さらにエツ
ジ８の上にシリコンゴム等よりなる吸音材９が設
けられている。１０は振動子７の共振を吸収して
短いパルスを送受するダンパ材である。１１はシ
ユー４を収容するケースであり、１２は配線用の
プラグである。ダンパ材としてはエポキシ樹脂に
比重の大きいタングステン粉末を混合したもの等
が使用される。 A part of the ultrasonic pulse emitted from the vibrator 7 does not enter the pipe 2 and is reflected by the surface to become a reflected echo, which becomes noise and is not desirable in terms of inspection accuracy. In order to prevent this reflected echo from returning to the vibrator 7, an edge 8 consisting of many grooves for diffused reflection is formed on the slope 62 of the shoe 4, and a sound absorbing material 9 made of silicone rubber or the like is provided on the edge 8. is provided. 10 is a damper material that absorbs the resonance of the vibrator 7 and transmits and receives short pulses. 11 is a case that accommodates the shoe 4, and 12 is a plug for wiring. As the damper material, a mixture of epoxy resin and tungsten powder having a high specific gravity is used.
以上のように構成した探触子１のシユー４の当
接面５を配管２の外側曲面３に当て、配管２の軸
方向に走査させることにより、一度の走査で広い
範囲の検査が可能である。 By applying the abutment surface 5 of the shoe 4 of the probe 1 configured as described above to the outer curved surface 3 of the pipe 2 and scanning it in the axial direction of the pipe 2, it is possible to inspect a wide range with one scan. be.
特に、原子炉等の悪環境下における配管２の検
査においては検査員保護の見地から特に短時間で
おこなうことが必要であり、このような場合に本
発明に係る探触子１を使用することはとりわけ有
効であるといえる。 In particular, when inspecting the piping 2 in a bad environment such as a nuclear reactor, it is necessary to perform the inspection in a particularly short time from the viewpoint of protecting inspectors, and the probe 1 according to the present invention can be used in such cases. can be said to be particularly effective.
（発明の効果）
本発明によれば、１個のシユーに多数の超音波
振動子を配置しているので、プラント等の配管の
探傷検査をするについて、一度の走査で広い範囲
を検査できるため、検査能率が良く、検査漏れが
生じる可能性も少ない上、走査のための走行も簡
単となる。。(Effects of the Invention) According to the present invention, since a large number of ultrasonic transducers are arranged in one shoe, a wide range can be inspected in one scan when inspecting piping in plants, etc. , inspection efficiency is high, there is less possibility of inspection omissions, and traveling for scanning is also easy. .
また、各々の振動子を順次発振させるので、ノ
イズが少なく、検査精度の向上が得られるもので
ある。 Furthermore, since each vibrator is sequentially oscillated, noise is reduced and inspection accuracy is improved.
更にまた、斜面にエツジを形成しかつ該斜面の
上に吸音材を設けているので乱反射が吸収され、
検査精度が向上する。 Furthermore, since an edge is formed on the slope and a sound absorbing material is provided on the slope, diffused reflection is absorbed.
Inspection accuracy improves.
第１図は、本発明の一実施例に係る探触子の原
理図と配管を示した斜視図である。第２図は、本
発明の一実施例に係る探触子の縦断面図である。
第３図は、シユー部分を示す正面図である。第４
図は従来に探触子と配管を示した斜視図である。
１：探触子、２：配管、３：外側曲面、４：シ
ユー、５：当接面、７：振動子。
FIG. 1 is a perspective view showing the principle and piping of a probe according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of a probe according to an embodiment of the present invention.
FIG. 3 is a front view showing the shoe portion. Fourth
The figure is a perspective view showing a conventional probe and piping. 1: probe, 2: piping, 3: outer curved surface, 4: shoe, 5: contact surface, 7: vibrator.
Claims (1)
７と、該振動子７が取付られ、かつ配管２の探傷
面である外側曲面３に当てるシユー４とを少なく
とも有する超音波探傷器の探触子１において、 シユー４を一個とし、探傷検査する配管２の外
側曲面３に適合した円弧状の当接面５をシユー４
に形成し、シユー４の上面に配管２の軸線方向に
対し斜めの角度を持つ２つの斜面６1，６2をシユ
ー４の周方向に形成し、一方の斜面６1の周方向
に振動子７を多数個配置し、他方の斜面６2に多
数の溝状の凹凸よりなるエツジ８を形成し、該エ
ツジ８の上に吸音材９が設けられ、前記振動子７
を適宜の順番で順次発振させることを特徴とする
超音波探傷器と探触子。[Claims] 1. An ultrasonic device having at least a vibrator 7 that mutually converts electrical vibration and mechanical vibration, and a shoe 4 to which the vibrator 7 is attached and which is applied to the outer curved surface 3 which is the flaw detection surface of the piping 2. In the probe 1 of the sonic flaw detector, there is one shoe 4, and the shoe 4 has an arc-shaped contact surface 5 that conforms to the outer curved surface 3 of the pipe 2 to be inspected.
Two slopes 6 1 and 6 2 that are oblique to the axial direction of the pipe 2 are formed on the upper surface of the shoe 4 in the circumferential direction of the shoe 4, and a vibrator is formed in the circumferential direction of one of the slopes 6 1 . A large number of oscillators 7 are arranged, an edge 8 consisting of a large number of groove-like unevenness is formed on the other slope 6 2 , and a sound absorbing material 9 is provided on the edge 8.
An ultrasonic flaw detector and probe characterized by sequentially oscillating in an appropriate order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60169724A JPS6230951A (en) | 1985-08-02 | 1985-08-02 | Probe for ultrasonic flaw detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60169724A JPS6230951A (en) | 1985-08-02 | 1985-08-02 | Probe for ultrasonic flaw detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6230951A JPS6230951A (en) | 1987-02-09 |
| JPH0513465B2 true JPH0513465B2 (en) | 1993-02-22 |
Family
ID=15891677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60169724A Granted JPS6230951A (en) | 1985-08-02 | 1985-08-02 | Probe for ultrasonic flaw detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6230951A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0664027B2 (en) * | 1988-08-23 | 1994-08-22 | 川崎製鉄株式会社 | Angle beam inspection head for pipes and angle beam inspection device for pipes using the same |
| US7975549B2 (en) | 2007-06-19 | 2011-07-12 | The Boeing Company | Method, apparatus and system for inspecting a workpiece having a curved surface |
| CN102105785B (en) * | 2008-07-24 | 2013-12-25 | 空中客车操作有限公司 | Ultrasonic inspection device for contoured workpieces |
| JP6014525B2 (en) * | 2013-03-22 | 2016-10-25 | Ｊｆｅスチール株式会社 | Ultrasonic flaw detection probe and ultrasonic flaw detection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5895255A (en) * | 1981-12-02 | 1983-06-06 | Hitachi Ltd | Multi type ultrasonic probe |
| JPS59151057A (en) * | 1983-02-17 | 1984-08-29 | Toshiba Corp | Ultrasonic flaw detector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5841491Y2 (en) * | 1979-05-20 | 1983-09-19 | 新日本製鐵株式会社 | Angle ultrasonic flaw detection probe for pipes |
-
1985
- 1985-08-02 JP JP60169724A patent/JPS6230951A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5895255A (en) * | 1981-12-02 | 1983-06-06 | Hitachi Ltd | Multi type ultrasonic probe |
| JPS59151057A (en) * | 1983-02-17 | 1984-08-29 | Toshiba Corp | Ultrasonic flaw detector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6230951A (en) | 1987-02-09 |
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