JPS6055015B2 - Flaw detection equipment using ultrasonic waves - Google Patents
Flaw detection equipment using ultrasonic wavesInfo
- Publication number
- JPS6055015B2 JPS6055015B2 JP13425479A JP13425479A JPS6055015B2 JP S6055015 B2 JPS6055015 B2 JP S6055015B2 JP 13425479 A JP13425479 A JP 13425479A JP 13425479 A JP13425479 A JP 13425479A JP S6055015 B2 JPS6055015 B2 JP S6055015B2
- Authority
- JP
- Japan
- Prior art keywords
- couplant
- tire
- ultrasonic
- flaw detection
- probe
- 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
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
本発明は超音波を用いた探傷装置に係り、、特に被検
体と超音波探触子との間に供給する接触媒質を少量とす
るのに好適な接触媒質供給装置を備えた超音波を用いた
探傷装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flaw detection device using ultrasonic waves, and in particular to a couplant supply device suitable for supplying a small amount of couplant between an object and an ultrasonic probe. The present invention relates to a flaw detection device using ultrasonic waves equipped with.
原子力発電所等の圧力容器、配管およびこれらの接続
部であるノズル部を超音波探傷する場合、従来から手作
業を主体とした探傷が行われていたが、検査員の放射線
被曝の低減および採取データの再現性向上等のため、遠
隔自動超音波探傷装置の必要性が大きくなつている。When performing ultrasonic flaw detection on pressure vessels, piping, and nozzles that connect these in nuclear power plants, etc., flaw detection has traditionally been carried out mainly by hand, but it is now possible to reduce the radiation exposure of inspectors and sample samples. In order to improve data reproducibility, there is a growing need for remote automatic ultrasonic flaw detection equipment.
そのため、特に、自動化のため超音波探触子の開発が各
方面で進められているが、小型化、被検体に対する超音
波的に完全な接触、汎用性および探傷精度の向上等困難
な問題が多く、現在のところこれらを満足できるものは
開発されていない。特に、原子力発電所では、被検体と
超音波探触子とを超音波的に良好に接触させるため両者
の間に供給する接触媒質の量を極力少なくすることが要
求されているが、従来のものは、接触媒質を多量に使用
しなければ超音波探傷ができないという欠点があり、そ
れの改良が望まれている。第１図は、従来から一般に使
用されている剛体型超音波探触子の構成図で、可変角探
触子の場合を示してある。For this reason, the development of ultrasonic probes is progressing in various fields, especially for automation, but difficult issues such as miniaturization, complete ultrasonic contact with the test object, versatility, and improvement of flaw detection accuracy are still being faced. Currently, nothing has been developed that satisfies many of these requirements. In particular, at nuclear power plants, it is required to minimize the amount of couplant supplied between the specimen and the ultrasonic probe in order to achieve good ultrasonic contact between the two. However, there is a drawback that ultrasonic flaw detection cannot be performed without using a large amount of couplant, and improvements are desired. FIG. 1 is a block diagram of a rigid ultrasonic probe that has been commonly used, and shows the case of a variable angle probe.
ケース１内の超音波探触子２からの超音波ビームは、シ
ュー３を経て被検体５の内部に至り、欠陥等による反射
エコーが受信されるが、この場合、探触子２とシュー３
との間の空間およびシュー３と被検体５の表面との間の
空間には、超音波を良好に伝えるため、水、グリセリン
等の接触媒質を流して、これらの間を超音波的に完全に
接触させるようにしている。すなわち、接触媒質は、外
部からケース１内に導き、探触子２とシュー３との間の
空間を満した後、シュー３に設けられたノズル穴４から
、図示矢印の方向に流し、シュー３と被検体５の表面と
の間を通つて外部へ放出される構成にしてある。したが
つて、被検体５の表面が溶接部のように波状の凹凸があ
る場合は、シュー３と被検体５との間に大きなギャップ
が生ずるため、多量の接触媒質を流さねばならず、また
、被検体５の表面が平滑であつても、接触媒質の量はか
なり多くなる。なお、図示を省略してあるが、探触子２
の軸はケース１内に内蔵されたモータの軸とギヤ結合さ
れていて、探触子２を回動させる可変角探触子としてあ
るが、この場合、探触子２の軸の端部を中空とし、この
部分にケース１内に連通する孔を設けておいて、探触．
子２の軸に接触媒質を供給するためのバイブを接続して
ある。また、探触子２としては送受信を分けた分割型探
触子が用いてある。これに対して第２図に示すタイヤ型
超音波探触子も多用されている。The ultrasonic beam from the ultrasonic probe 2 in the case 1 passes through the shoe 3 and reaches the inside of the object 5, and a reflected echo due to a defect etc. is received.
In order to transmit ultrasonic waves well, a couplant such as water or glycerin is flowed into the space between the shoe 3 and the surface of the subject 5 to completely transmit ultrasonic waves between them. I try to bring it into contact with. That is, the couplant is introduced into the case 1 from the outside, fills the space between the probe 2 and the shoe 3, and then flows through the nozzle hole 4 provided in the shoe 3 in the direction of the arrow shown in the figure, and flows through the shoe 3. 3 and the surface of the subject 5 and is emitted to the outside. Therefore, if the surface of the specimen 5 has wavy irregularities such as a weld, a large gap will be created between the shoe 3 and the specimen 5, requiring a large amount of couplant to flow. Even if the surface of the specimen 5 is smooth, the amount of couplant will be considerably large. Although not shown, the probe 2
The shaft is gear-coupled with the shaft of a motor built into the case 1, and is used as a variable angle probe that rotates the probe 2. In this case, the end of the shaft of the probe 2 is It is hollow, and a hole communicating with the inside of the case 1 is provided in this part for the probe.
A vibrator for supplying the couplant is connected to the shaft of the child 2. Further, as the probe 2, a split type probe is used in which transmission and reception are separated. On the other hand, a tire-shaped ultrasonic probe shown in FIG. 2 is also widely used.
タイヤ型超音波探触子の場；合は、超音波探触子６を収
納したタイヤ７を被検体５上を回転させて探触子６を移
動させる構成になつているので、第１図の構成の探触子
の場合のように、探触子内部から接触媒質を導出するこ
とができないので、従来は、タイヤ７の回転進行方一向
の直前にノズル８を設け、ノズル８からタイヤ７と被検
体５との間に接触媒質を供給するようにしていた。第２
図に示す探触子は、タイヤ７として柔軟性があるコム状
のものを使用すると、被検体５の表面の凹凸に追従でき
、かつ、タイヤ７と被検体５との接触面積が小さいので
、第１図の場合より接触媒質の量を少なくできる利点が
あるが、ノズル８から放出される接触媒質をタイヤ７と
被検体５との間に効率よく供給することが困難てあり、
接触媒質を無駄に消費し、結局、接触媒質の供給量を多
くしなければならないという欠点がある。本発明は上記
に鑑みてなされたものであつて、Ｌその目的とするとこ
ろは、最小限の接触媒質で超音波探触子と被検体との間
に介在させる構造物と被検体との間を超音波的に良好に
接触させることができる接触媒質供給装置を備えた超音
波を用いた探傷装置を提供することにある。本発明の特
徴は、超音波探触子と被検体との間に介在させた構造物
の被検体に接触する部分と被検体とのうちの少なくとも
一方に少なくとも１個の接触媒質が供給される回転体か
ら接触媒質を供給するようにした点にある。In the case of a tire-type ultrasonic probe, since the configuration is such that the probe 6 is moved by rotating a tire 7 housing the ultrasonic probe 6 over the subject 5, as shown in FIG. Since it is not possible to extract the couplant from inside the probe as in the case of a probe having the configuration shown in FIG. A couplant was supplied between the sample and the subject 5. Second
The probe shown in the figure can follow the unevenness of the surface of the subject 5 by using a flexible comb-shaped tire 7, and the contact area between the tire 7 and the subject 5 is small. Although there is an advantage that the amount of couplant material can be reduced compared to the case of FIG. 1, it is difficult to efficiently supply the couplant material discharged from the nozzle 8 between the tire 7 and the test object 5.
The disadvantage is that the couplant is wasted and a large amount of couplant must be supplied. The present invention has been made in view of the above, and an object of the present invention is to connect a structure interposed between an ultrasonic probe and a subject with a minimum amount of couplant and the subject. It is an object of the present invention to provide a flaw detection device using ultrasonic waves, which is equipped with a couplant supply device that can bring the particles into good ultrasonic contact with each other. A feature of the present invention is that at least one couplant is supplied to at least one of a portion of a structure interposed between an ultrasound probe and a subject that contacts the subject and the subject. The main feature is that the couplant is supplied from the rotating body.
以下本発明を第３図ないし第５図に示した実施例を用い
て詳細に説明する。第３図は本発明の超音波を用いた探
傷装置の超音波探触子部分の一実施例を示す平面図、第
４図は第３図のＡ−Ａ線断面図で、タイヤ型超音波探触
子の場合を示してある。The present invention will be explained in detail below using the embodiments shown in FIGS. 3 to 5. Fig. 3 is a plan view showing an embodiment of the ultrasonic probe part of the flaw detection device using ultrasonic waves according to the present invention, and Fig. 4 is a sectional view taken along the line A-A in Fig. 3. The case of a probe is shown.
第３図、第４図において、９は超音波を送受信する超音
波探触子、１０は柔軟性があるコム状物質より構成され
たタイヤで、タイヤ１０内に水またはグリセリン等の接
触媒質が充填された状態で超音波探触子９が内蔵されて
いる。１１はホルダーで、タイヤ１０はホルダー１１に
回転自在に支持されているシャフト１２にホィール１３
を介して保持されている。3 and 4, 9 is an ultrasonic probe that transmits and receives ultrasonic waves, 10 is a tire made of a flexible comb-like substance, and the tire 10 has a couplant such as water or glycerin inside it. The ultrasonic probe 9 is built-in in a filled state. Reference numeral 11 denotes a holder, and the tire 10 has a wheel 13 attached to a shaft 12 rotatably supported by the holder 11.
is held through.
１４はタイヤ１０が図示Ｒ方向に回転してｘ方向に移動
するときにタイヤ１０の前方に位置し、かつ、タイヤ１
０の外周に接触するように設けられた回転体で、回転体
１４は、毛細管現象が生ずる内面から外面に通する微細
な空間がある繊維質の部材で円筒形に構成されており、
ホルダー１１に回転自在に支持されているシャフト１５
に取りつけてあつて、シャフト１５を介してホース１６
から供給される接触媒質をタイヤ１０の表面に供給でき
るようにしてある。14 is located in front of the tire 10 when the tire 10 rotates in the R direction shown in the figure and moves in the x direction;
The rotating body 14 is a rotating body provided so as to be in contact with the outer periphery of the rotating body 14. The rotating body 14 is a cylindrical fibrous member with a minute space passing from the inner surface to the outer surface where capillary action occurs.
A shaft 15 rotatably supported by the holder 11
is attached to the hose 16 via the shaft 15.
The couplant supplied from the tire 10 can be supplied to the surface of the tire 10.
次に動作について説明する。Next, the operation will be explained.
超音波探触子９のＸ方向の走査に応じてタイヤ１０はＲ
方向に回転しながら移動する。一方、超音波探触子９は
、常に被検体５に一定の角度で向いており、超音波探触
子９からの超音波ビームは、タイヤ１０内の接触媒体、
タイヤ１０を通して被検体５に入射される。このとき、
回転体１４は、タイヤ１０に接触しているから、タイヤ
１０の回転とともに回転し、かつ、回転体１４の内面か
ら外面へ毛細管現象によつて導出されたバイブ１６から
回転体１４に供給された接触媒質をタイヤ１０の表面に
供給する。したがつて、タイヤ１０と被検体５との接触
面は、常に接触媒質で満され、超音波的に良好な接触状
態に保たれる。しかも、接触媒質に無駄がないように供
給できるから、第２図の場合に比較して、接触媒質の供
給量が少なくて済む。上記したように、本発明の実施例
によれば、接触媒質の供給量を少なくすることができ、
また、タイヤ１０と被検体５との接触面を常に超音波的
に良好な接触状態に保持することができるから、超音波
探傷性能を高めることができる。なお、実験によれば、
接触媒質の必要量は、第２図の場合の約１１５０以下で
あつた。また、接触媒質を供給するための装置の構造は
非常に簡単であり、探触子駆動装置全体を小型化てきる
。なお、第３図、第４図に示した実施例では、回転体１
４が１個になつているが、超音波探触子９を一方向のみ
でなく、両方向（前後）に走査する場合があり、この場
合は、回転体１４をタイヤ１０の前後に１個ずつ設ける
ようにするのがよい。The tire 10 is rotated in accordance with the scanning of the ultrasonic probe 9 in the X direction.
Move while rotating in the direction. On the other hand, the ultrasonic probe 9 is always facing the subject 5 at a constant angle, and the ultrasonic beam from the ultrasonic probe 9 is transmitted to the contact medium in the tire 10.
The light is incident on the subject 5 through the tire 10. At this time,
Since the rotating body 14 is in contact with the tire 10, it rotates with the rotation of the tire 10, and is supplied to the rotating body 14 from the vibrator 16 led out from the inner surface of the rotating body 14 to the outer surface by capillary action. A couplant is provided to the surface of the tire 10. Therefore, the contact surface between the tire 10 and the subject 5 is always filled with couplant and maintained in a good ultrasonic contact state. Moreover, since the couplant can be supplied without wasting it, the amount of couplant to be supplied can be smaller than in the case of FIG. 2. As described above, according to the embodiments of the present invention, the amount of couplant supplied can be reduced;
Moreover, since the contact surface between the tire 10 and the test object 5 can always be maintained in a good ultrasonic contact state, the ultrasonic flaw detection performance can be improved. Furthermore, according to the experiment,
The amount of couplant required was less than about 1150 in the case of FIG. Furthermore, the structure of the device for supplying the couplant is very simple, and the entire probe drive device can be miniaturized. In addition, in the embodiment shown in FIGS. 3 and 4, the rotating body 1
However, there are cases where the ultrasonic probe 9 is scanned not only in one direction but in both directions (front and back), and in this case, the rotating body 14 is installed one each at the front and rear of the tire 10 It is better to provide one.
また、回転体１４は繊維質の部材に限定されるものでな
く、例えば、多孔質のスポンジ、あるいは、円筒形の剛
体の内面から外面に通じる多数の微細な孔があけてある
ものであつてもよい。さらに、実施例ては、回転体１４
の内部に接触媒質を供給するようにしてあるが、回転体
１４が接触媒質を含浸できる部材で構成されているとき
は、外部から接触媒質を供給するようにしてもよく、こ
れらにより効果が変ることはない。この場合、回転体１
４は円筒形である必要はなく、円柱形であつてもよい。
また、第３図、第４図にはタイヤ型超音波探触子の場合
を示してあるが、第５図に示すようにすることにより、
本発明を剛体型超音波探触子に適用することが可能であ
る。Further, the rotating body 14 is not limited to a fibrous member, but may be, for example, a porous sponge or a cylindrical rigid body with many fine holes communicating from the inner surface to the outer surface. Good too. Furthermore, in the embodiment, the rotating body 14
Although the couplant is supplied to the inside of the rotating body 14, if the rotating body 14 is made of a member that can be impregnated with the couplant, the couplant may be supplied from the outside, and the effect will change depending on the configuration. Never. In this case, the rotating body 1
4 does not need to be cylindrical, and may be cylindrical.
In addition, although FIGS. 3 and 4 show the case of a tire-type ultrasonic probe, by making it as shown in FIG.
The present invention can be applied to rigid ultrasound probes.
第５図ａは縦断面図、ｂは平面図であつて、第５図にお
いては、超音波探触子１７と被検体５との間にシュー１
８が介在させてあつて、シュー１８が被検体５に接触す
るようになつているが、この場合は、シュー１８内に図
に示すように多孔質の回転体１９，２０を回転体１９，
２０の表面がシュー１８の被検体５との接触面と一致す
るように内蔵させ、回転体１９，２０はそれぞれケース
２１に軸受２２，２３によつて回転自在に支持する。一
方、ケース２１内に超音波探触子１７を支持しているシ
ャフト２４に接続してあるバイブ２５より供給される接
触媒質は、シャフト２４に設けてある連通孔２６よりケ
ース２１内に流れ込み、超音波探触子１７とシュー１８
との間の空間を埋めるとともに回転体１９，２０に供給
される。回転体１９，２０に供給された接触媒質は、回
転体１９，２０の回転にともなつて、それぞれ回転体１
９，２０から被検体５に供給される。したがつて、シュ
ー１８と被検体５とが超音波的に良好な接触状態に保持
され、かつ、第３図、第４図の場合と同様、接触媒質の
供給量を少なくできる。以上説明したように、本発明に
よれば、最小限の接触媒質で超音波探触子と被検体との
間に介在させてある構造物と被検体との間を超音波的に
良好に接触させることができ、超音波探傷性能を高める
ことができるという顕著な効果がある。FIG. 5 a is a longitudinal sectional view, and b is a plan view. In FIG.
8 is interposed so that the shoe 18 comes into contact with the subject 5. In this case, porous rotating bodies 19, 20 are placed inside the shoe 18 as shown in the figure.
The rotating bodies 19 and 20 are rotatably supported in the case 21 by bearings 22 and 23, respectively. On the other hand, the couplant supplied from the vibrator 25 connected to the shaft 24 supporting the ultrasonic probe 17 inside the case 21 flows into the case 21 through the communication hole 26 provided in the shaft 24. Ultrasonic probe 17 and shoe 18
It is supplied to the rotating bodies 19 and 20 while filling the space between them. As the rotors 19 and 20 rotate, the couplant supplied to the rotors 19 and 20 is transferred to the rotor 1, respectively.
9 and 20 to the subject 5. Therefore, the shoe 18 and the subject 5 are maintained in a good ultrasonic contact state, and the amount of couplant supplied can be reduced as in the case of FIGS. 3 and 4. As explained above, according to the present invention, good ultrasonic contact can be made between the object and the structure interposed between the ultrasound probe and the object with a minimum amount of couplant. This has the remarkable effect of improving ultrasonic flaw detection performance.
第１図は従来の剛体型超音波探触子の構成図、第２図は
従来のタイヤ型超音波探触子の使用説明図、第３図は本
発明の超音波を用いた探傷装置の超音波探触子部分の一
実施例を示す平面図、第４図は第３図のＡ−Ａ線断面図
、第５図は本発明の７他の実施例を示す構成図である。Fig. 1 is a configuration diagram of a conventional rigid type ultrasonic probe, Fig. 2 is an explanatory diagram of the use of a conventional tire type ultrasonic probe, and Fig. 3 is a diagram of the flaw detection device using ultrasonic waves of the present invention. FIG. 4 is a plan view showing one embodiment of the ultrasonic probe portion, FIG. 4 is a sectional view taken along the line A--A in FIG. 3, and FIG. 5 is a configuration diagram showing seven other embodiments of the present invention.
Claims (1)
移動する構造物を介在させてあるものにおいて、前記構
造物の前記被検体に接触する部分と前記被検体とのうち
の少なくとも一方に接触媒質を供給する少なくとも１個
の前記接触媒質が供給される回転体を備えていることを
特徴とする超音波を用いた探傷装置。 ２ 構造物が回転自在のゴム状のタイヤであつて、回転
体が前記タイヤの外周に接触して回転する内面に通じる
微細な空間を有する円筒体で構成されていて該円筒体内
部に接触媒質が供給されている特許請求の範囲第１項記
載の超音波を用いる探傷装置。 ３ 回転体が接触媒質を含浸可能な部材で構成されてい
る特許請求の範囲第１項または第２項記載の超音波を用
いた探傷装置。[Scope of Claims] 1. In a device in which a structure that moves in contact with the subject is interposed between the ultrasound probe and the subject, a portion of the structure that comes into contact with the subject; A flaw detection apparatus using ultrasonic waves, comprising: a rotary body to which at least one couplant is supplied, the rotary body supplying the couplant to at least one of the specimens. 2 The structure is a rotatable rubber tire, and the rotating body is composed of a cylindrical body having a fine space communicating with the inner surface of the tire that rotates in contact with the outer periphery of the tire, and a couplant is contained inside the cylindrical body. A flaw detection device using ultrasonic waves according to claim 1, wherein: 3. The ultrasonic flaw detection device according to claim 1 or 2, wherein the rotating body is made of a member capable of being impregnated with a couplant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13425479A JPS6055015B2 (en) | 1979-10-19 | 1979-10-19 | Flaw detection equipment using ultrasonic waves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13425479A JPS6055015B2 (en) | 1979-10-19 | 1979-10-19 | Flaw detection equipment using ultrasonic waves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5658661A JPS5658661A (en) | 1981-05-21 |
| JPS6055015B2 true JPS6055015B2 (en) | 1985-12-03 |
Family
ID=15123991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13425479A Expired JPS6055015B2 (en) | 1979-10-19 | 1979-10-19 | Flaw detection equipment using ultrasonic waves |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6055015B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020137141A1 (en) * | 2018-12-28 | 2020-07-02 | 三菱重工エンジニアリング株式会社 | Pipe inspection apparatus and pipe inspection method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59208458A (en) * | 1983-05-13 | 1984-11-26 | Nippon Steel Corp | Ultrasonic wave probe device |
| JPS6280553A (en) * | 1985-10-03 | 1987-04-14 | Kanto Tokushu Seiko Kk | Ultrasonic flaw inspection method for cylindrical body |
| US9027406B2 (en) * | 2011-05-16 | 2015-05-12 | General Electric Company | Transducer apparatus and method for assembling a transducer apparatus |
| WO2018211558A1 (en) * | 2017-05-15 | 2018-11-22 | 三菱電機株式会社 | Ultrasound measuring device |
-
1979
- 1979-10-19 JP JP13425479A patent/JPS6055015B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020137141A1 (en) * | 2018-12-28 | 2020-07-02 | 三菱重工エンジニアリング株式会社 | Pipe inspection apparatus and pipe inspection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5658661A (en) | 1981-05-21 |
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