JPH0610315Y2 - Ultrasonic probe for nozzle corner - Google Patents
Ultrasonic probe for nozzle cornerInfo
- Publication number
- JPH0610315Y2 JPH0610315Y2 JP11214987U JP11214987U JPH0610315Y2 JP H0610315 Y2 JPH0610315 Y2 JP H0610315Y2 JP 11214987 U JP11214987 U JP 11214987U JP 11214987 U JP11214987 U JP 11214987U JP H0610315 Y2 JPH0610315 Y2 JP H0610315Y2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- probe
- nozzle corner
- view
- ultrasonic 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 - Lifetime
Links
- 239000000523 sample Substances 0.000 title claims description 36
- 239000011810 insulating material Substances 0.000 claims description 4
- 230000007547 defect Effects 0.000 description 10
- 239000002344 surface layer Substances 0.000 description 9
- 238000001514 detection method Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、原子炉圧力容器ノズルコーナー等の超音波探
傷試験に好適なノズルコーナー部用超音波探触子に関す
る。[Detailed Description of the Invention] [Industrial application] The present invention relates to an ultrasonic probe for a nozzle corner, which is suitable for an ultrasonic flaw detection test for a nozzle corner of a reactor pressure vessel.
原子炉圧力容器等発電プラントの重要な容器のノズル
は、第４図斜視図に示すように、Ｒ1の内径でＲ2の曲率
のノズルコーナー部10を有するノズル９が、容器のドラ
ム８に接合されており、従来、このノズルコーナー部10
の表層部にある欠陥11に対し超音波探傷試験が実施さ
れ、ノズルコーナー部10の曲率半径Ｒ2が比較的大きい
場合は、第５図(A)斜視図及び(B)側面図に示すように、
平面被検体12の場合に適用されている接触面がほゞ平滑
な分割型探触子６′，７′が使用されている。As shown in the perspective view of FIG. 4, a nozzle of an important vessel of a power plant such as a reactor pressure vessel has a nozzle 9 having a nozzle corner portion 10 having an inner diameter of R 1 and a curvature of R 2 on a drum 8 of the vessel. It has been joined and conventionally, this nozzle corner 10
When an ultrasonic flaw detection test is carried out on the defect 11 on the surface layer of the above, and the radius of curvature R 2 of the nozzle corner portion 10 is relatively large, as shown in FIG. 5 (A) perspective view and (B) side view. To
The split type probes 6'and 7'having a substantially smooth contact surface applied to the case of the flat object 12 are used.
しかしながら、ノズルコーナー部10の曲率半径Ｒ2が約1
0mm程度に小さくなると、次のような問題点が生ずる。
すなわち第５図に示すように、通常の分割型探触子は送
信用探触子６′から発射された超音波が表層部の欠陥11
で反射された後、受信探触子７′で検出するように構造
となっており、一般にその接触面は平面か又は曲率半径
の大きい曲面となっている。このため従来の分割型探触
子を曲率半径の小さいノズルコーナー部に用いると、第
６図(A)斜視図及び(B)側面図に示すように、曲率部のレ
ンズ効果により超音波が発散する方向に屈折して伝播す
ることになり、その結果送，受信探触子６′，７′の超
音波ビームの交点がなくなるか、極めて深くなり、従っ
て深部の欠陥13が検出可能となる場合があるものゝ、表
層欠陥11が検出不可能となってしまう不具合がある。However, the radius of curvature R 2 of the nozzle corner portion 10 is about 1
When it is reduced to about 0 mm, the following problems occur.
That is, as shown in FIG. 5, in the normal split type probe, the ultrasonic waves emitted from the transmitting probe 6 ′ are defects 11 in the surface layer portion.
It is structured so that it is detected by the reception probe 7'after being reflected by, and its contact surface is generally a flat surface or a curved surface having a large radius of curvature. Therefore, if a conventional split probe is used for the nozzle corner with a small radius of curvature, ultrasonic waves diverge due to the lens effect of the curvature, as shown in Fig. 6 (A) perspective view and (B) side view. When the ultrasonic beams of the transmitting and receiving probes 6 ', 7'become lost or become extremely deep, so that the deep defect 13 can be detected. However, there is a problem that the surface layer defect 11 cannot be detected.
本考案は、このような事情に鑑みて提案されたもので、
曲率半径の小さいノズルコーナー部の表層欠陥の検出が
可能となり、探傷試験の信頼性が大巾に向上するノズル
コーナー部用超音波探触子を提供することを目的とす
る。The present invention has been proposed in view of such circumstances,
An object of the present invention is to provide an ultrasonic probe for a nozzle corner, which enables detection of surface layer defects in the nozzle corner having a small radius of curvature and greatly improves the reliability of the flaw detection test.
そのために本考案は、裏面をノズルコーナー部の形状に
合う形状に形成した一対のプラスチックシューをほゞ90
゜の夾角で遮音材を介し突合わせ固着するとゝもに、上
記一対のプラスチックシューの一方の外表面上に送信用
探触子、他方の外表面上に受信用探触子をそれぞれ載置
したことを特徴とする。To this end, the present invention has a pair of plastic shoes whose back surface is shaped to match the shape of the nozzle corners.
When abutting and fixing via a sound insulating material at an included angle of °, a transmitting probe was placed on one outer surface of the pair of plastic shoes, and a receiving probe was placed on the other outer surface. It is characterized by
上述の構成により、曲率半径の小さいノズルコーナー部
の表層欠陥の検出が可能となり、探傷試験の信頼性が大
巾に向上するノズルコーナー部用超音波探触子を得るこ
とができる。With the above-described configuration, it is possible to detect a surface layer defect in a nozzle corner portion having a small radius of curvature, and it is possible to obtain an ultrasonic probe for a nozzle corner portion, which greatly improves the reliability of a flaw detection test.
本考案ノズルコーナー部用超音波探触子の一実施例を図
面について説明すると、第１図はその斜視図、第２図は
第１図の探触子をノズルコーナー部の探傷に適用してい
る状態を示す斜視図、第３図は第１図の探触子の作用説
明図で同図(A)は斜視図、同図(B)は側面図である。An embodiment of the ultrasonic probe for a nozzle corner of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view thereof, and FIG. 2 is a perspective view of the probe of FIG. 1 applied to flaw detection of a nozzle corner. FIG. 3 is a perspective view showing the operation of the probe shown in FIG. 1, FIG. 3 (A) is a perspective view, and FIG. 3 (B) is a side view.
まず、第１図，第２図において、１，２は一対のプラス
チックシューで、１はドラム８側に接触し、２はノズル
９側に接触する。この一対のプラスチックシュー１，２
はその間に挿入したコルク等の遮音材３を介してＬ字形
に突合わされ固着されており、両者の外表面のなす夾角
はぼゞ90゜となっている。First, in FIGS. 1 and 2, 1 and 2 are a pair of plastic shoes, 1 being in contact with the drum 8 side and 2 being in contact with the nozzle 9 side. This pair of plastic shoes 1,2
Are abutted and fixed in an L-shape via a sound insulating material 3 such as cork inserted therebetween, and the included angle formed by the outer surfaces of both is 90 °.
またノズル側プラスチックシュー２の裏側はノズル９内
径と同一の曲率半径Ｒ1（第４図参照）であり、かつド
ラム側プラスチックシュー１とノズル側プラスチックシ
ュー２が突合わされた個所の裏面はノズルコーナー10の
曲率半径Ｒ2（第４図参照）と同じ曲率の曲面となって
いる。The back side of the nozzle side plastic shoe 2 has the same radius of curvature R 1 (see FIG. 4) as the inner diameter of the nozzle 9, and the back surface of the portion where the drum side plastic shoe 1 and the nozzle side plastic shoe 2 are abutted is the nozzle corner. The curved surface has the same curvature as the radius of curvature R 2 of 10 (see FIG. 4).
４，５はプラスチック楔で、探触子６，７と組み合わせ
て、横波や縦波又はクリーピング波等の波動モードで60
゜〜90゜の屈折角の探傷を行うことができるものであり、
プラスチックシュー１，２の外表面上にそれぞれ載置さ
れる。なお、図面では、探触子６，７と楔４，５とを別
々のものとして表示しているが、これらが一体化されて
いる通常の斜角探触子を用いることができ、探触子６，
７は一方を送信用とし他方を受信用として用いる。Plastic wedges 4 and 5 are used in combination with the probes 6 and 7 in the wave mode such as transverse wave, longitudinal wave or creeping wave
It is possible to detect flaws with a refraction angle of 90 ° to 90 °.
They are placed on the outer surfaces of the plastic shoes 1 and 2, respectively. In the drawing, the probes 6 and 7 and the wedges 4 and 5 are shown as separate components, but a normal bevel probe in which these are integrated can be used. Child 6,
7 uses one for transmission and the other for reception.
このような装置において、２個の探触子６，７をそれぞ
れのプラスチックシュー１，２上で適切に配置し、第３
図(A)，(B)に示すように、探触子６を送信用としてノズ
ルコーナー部１０へ向けて超音波ビームを送信し、探触
子７を受信用としてこの超音波ビームを受信する。In such a device, the two probes 6, 7 are properly arranged on the respective plastic shoes 1, 2 and
As shown in FIGS. (A) and (B), the probe 6 is used to transmit an ultrasonic beam toward the nozzle corner portion 10, and the probe 7 is used to receive the ultrasonic beam. .
従って曲率半径の小さいノズルコーナー部10において
も、表層部に送信用探触子６と受信用探触子７の超音波
ビームの交点を持たせることが可能となり、その結果ノ
ズルコーナー部10の表層欠陥11の検出が可能となる。Therefore, even in the nozzle corner portion 10 having a small radius of curvature, it is possible to provide the surface layer portion with the intersection of the ultrasonic beams of the transmitting probe 6 and the receiving probe 7, and as a result, the surface layer of the nozzle corner portion 10 can be obtained. The defect 11 can be detected.
なお上記実施例ではプラスチックシュー１，２と探触子
６，７とは別体作りとしているが、一体作りとすること
もできる。Although the plastic shoes 1 and 2 and the probes 6 and 7 are separately formed in the above embodiment, they may be integrally formed.
要するに本考案によれば、裏面をノズルコーナー部の形
状に合う形状に形成した一対のプラスチックシューをほ
ゞ90゜の夾角で遮音材を介し突合わせ固着するとゝも
に、上記一対のプラスチックシューの一方の外表面上に
送信用探触子、他方の外表面上に受信用探触子をそれぞ
れ載置したことにより、曲率半径の小さいノズルコーナ
ー部の表層欠陥の検出が可能となり、探傷試験の信頼性
が大巾に向上するノズルコーナー部用超音波探触子を得
るから、本考案は産業上極めて有益なものである。In short, according to the present invention, a pair of plastic shoes whose back surfaces are shaped to match the shape of the nozzle corners are butted and fixed to each other through a sound insulating material at an included angle of about 90 °. By placing the transmitting probe on one outer surface and the receiving probe on the other outer surface, respectively, it becomes possible to detect surface layer defects at the nozzle corner with a small radius of curvature, and The present invention is extremely useful industrially because an ultrasonic probe for a nozzle corner portion, which greatly improves reliability, is obtained.
第１図は本考案ノズルコーナー部用超音波探触子の一実
施例を示す斜視図、第２図は第１図の探触子をノズルコ
ーナー部の探傷に適用している状態を示す斜視図、第３
図は第１図の探触子の作用説明図で同図(A)は斜視図、
同図(B)は側面図である。 第４図は公知のノズルコーナー部を示す斜視図、第５
図，第６図はそれぞれ従来の超音波探触子の説明図で、
両図とも(A)は斜視図、(B)は側面図である。 １……ドラム側プラスチックシュー、２……ノズル側プ
ラスチックシュー、３……遮音材、４，５……楔、６，
７……探触子、６′，７′……従来の探触子、８……ド
ラム、９……ノズル、10……ノズルコーナー部、11……
表層部の欠陥、12……平面被検体、13……深部の欠陥、FIG. 1 is a perspective view showing an embodiment of the ultrasonic probe for a nozzle corner of the present invention, and FIG. 2 is a perspective view showing a state where the probe of FIG. 1 is applied to flaw detection of a nozzle corner. Figure, third
The figure is an explanatory view of the operation of the probe of FIG. 1, and the figure (A) is a perspective view,
FIG. 3B is a side view. FIG. 4 is a perspective view showing a known nozzle corner portion, and FIG.
6 and 6 are explanatory views of a conventional ultrasonic probe,
In both figures, (A) is a perspective view and (B) is a side view. 1 ... Drum side plastic shoe, 2 ... Nozzle side plastic shoe, 3 ... Sound insulation material, 4, 5 ... Wedge, 6,
7 ... Probe, 6 ', 7' ... Conventional probe, 8 ... Drum, 9 ... Nozzle, 10 ... Nozzle corner part, 11 ...
Defects in the surface layer, 12 ... Plane object, 13 ... Defects in the deep part,
Claims (1)
に形成した一対のプラスチックシューをほゞ90゜の夾角
で遮音材を介し突合わせ固着するとゝもに、上記一対の
プラスチックシューの一方の外表面上に送信用探触子、
他方の外表面上に受信用探触子をそれぞれ載置したこと
を特徴とするノズルコーナー部用超音波探触子。1. A pair of plastic shoes whose back surface is shaped to match the shape of a nozzle corner are butted and fixed together through a sound insulating material at an included angle of about 90 °. Transmitting probe on the outer surface,
An ultrasonic probe for a nozzle corner, wherein receiving probes are placed on the other outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11214987U JPH0610315Y2 (en) | 1987-07-22 | 1987-07-22 | Ultrasonic probe for nozzle corner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11214987U JPH0610315Y2 (en) | 1987-07-22 | 1987-07-22 | Ultrasonic probe for nozzle corner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6417461U JPS6417461U (en) | 1989-01-27 |
| JPH0610315Y2 true JPH0610315Y2 (en) | 1994-03-16 |
Family
ID=31350825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11214987U Expired - Lifetime JPH0610315Y2 (en) | 1987-07-22 | 1987-07-22 | Ultrasonic probe for nozzle corner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0610315Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6251025B2 (en) * | 2013-11-28 | 2017-12-20 | 日立Ｇｅニュークリア・エナジー株式会社 | Reactor pressure vessel nozzle maintenance device and maintenance method thereof |
-
1987
- 1987-07-22 JP JP11214987U patent/JPH0610315Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6417461U (en) | 1989-01-27 |
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