JP4631208B2 - Tube flaw detector - Google Patents

Tube flaw detector Download PDF

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Publication number
JP4631208B2
JP4631208B2 JP2001151465A JP2001151465A JP4631208B2 JP 4631208 B2 JP4631208 B2 JP 4631208B2 JP 2001151465 A JP2001151465 A JP 2001151465A JP 2001151465 A JP2001151465 A JP 2001151465A JP 4631208 B2 JP4631208 B2 JP 4631208B2
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JP
Japan
Prior art keywords
head
tube
flaw detector
bending
ultrasonic probe
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Expired - Fee Related
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JP2001151465A
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Japanese (ja)
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JP2002340867A (en
Inventor
一 東海林
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IHI Corp
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IHI Corp
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Priority to JP2001151465A priority Critical patent/JP4631208B2/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/04Wave modes and trajectories
    • G01N2291/044Internal reflections (echoes), e.g. on walls or defects

Description

【0001】
【発明の属する技術分野】
本発明は、管の傷を超音波により探傷する管探傷装置に関するものである。
【0002】
【従来の技術】
図8は従来の管探傷装置の一例であり、この管探傷装置では、検査すべき管1に挿入可能な円筒状のセンサケース2に、管1の先端側へ管軸線に対して斜めに超音波を出射する管軸線方向探触子3と、管1の基端側へ管軸線に対して斜めに超音波を出射する管軸線方向探触子4と、管1の径方向へ超音波を出射する管径方向探触子5と、管1の接線方向へ超音波を出射する管接線方向探触子6,7とを、管軸線方向に一列に並べて組み込んでいる。
【0003】
センサケース2の先端部及び基端部には、センサケース2を管1に挿入する際に、センサケース2の中心を管軸線に一致させるための調芯ガイド8,9が装着されている。
【0004】
そして基端部側の調芯ガイド9には、管1の基端側に配置される駆動機構の連結棒を接続するための継手部材10が設けられている。
【0005】
管1の検査を実施する際には、上述した管探傷装置の継手部材10を駆動機構の連結棒に接続し、当該駆動機構を操作することにより、連結棒を管1の先端側へ向かって移動させ、管1の所定位置へ管探傷装置を挿入する。
【0006】
次いで、各探触子3,4,5,6,7から管1内面へ超音波を出射し、管1の探傷を行う。
【0007】
また、駆動機構を操作することにより、連結棒を管1の周方向へ回動させて、各探触子3,4,5,6,7が出射する超音波の向きを変化させ、管1を全周にわたって探傷する。
【0008】
【発明が解決しようとする課題】
しかしながら、図8に示す管探傷装置では、複数の探触子3,4,5,6,7を、単一のセンサケース2に組み込んだ構造であるため、溶接施工時の変形などに起因して管軸線が屈曲していると、センサケース2と管1内面とが競合して、探触子3,4,5,6,7を管軸線方向へ移動させることや、探触子3,4,5,6,7が出射する超音波の向きを変えることができなくなってしまう。
【0009】
本発明は上述した実情に鑑みてなしたもので、軸線が屈曲した管に対応可能な管探傷装置を提供することを目的としている。
【0010】
【課題を解決するための手段】
上記目的を達するため本発明の請求項1に記載の管探傷装置では、複数のヘッド構成体を一列に並べ且つ隣接するヘッド構成体を自在継手を介して屈曲可能に連結した屈曲ヘッドと、当該屈曲ヘッドの列中間部分に位置する所定のヘッド構成体に装着した超音波探触子と、検査すべき管の内面に当接し得るように各ヘッド構成体に取り付けた第1のガイド部材と、隣接するヘッド構成体を互いに離反する方向へ付勢し且つ検査すべき管の内面に密接して摺動し得るようにヘッド構成体間に介在させた第2のガイド部材とを備えている。
【0011】
本発明の請求項2に記載の管探傷装置では、ヘッド構成体に超音波探触子を交換可能に装着している。
【0012】
本発明の請求項3に記載の管探傷装置では、屈曲ヘッドの一端と他端に、それぞれ超音波探触子が装着されていないヘッド構成体を連結している。
【0013】
本発明の請求項1乃至請求項3に記載の管探傷装置のいずれにおいても、超音波探触子を装着した複数のヘッド構成体が、自在継手で連結された部分で屈曲し、管の内面に密接して摺動する第2のガイド部材に誘導され、管の軸線が屈曲していても、その内面に順応しながら移動できる。
【0014】
本発明の請求項2に記載の管探傷装置においては、1個の超音波探触子が故障した場合に、全体の屈曲ヘッドを交換する必要がなく、故障した超音波探触子のみを交換する。
【0015】
本発明の請求項3に記載の管探傷装置においては、超音波探触子を装着した複数のヘッド構成体が、屈曲ヘッドの両端に連結されている超音波探触子を装着していないヘッド構成体と第2のガイド部材とによって、管軸線状に位置する。
【0016】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
【0017】
図1乃至図7は本発明の管探傷装置の実施の形態の一例であり、図1に示すように、先端側には1個のヘッド構成体11が配置されていて、その直下には4個のヘッド構成体12が一列に並べて配置され、これら4個のヘッド構成体12の下方の基端側には更に2個のヘッド構成体11が配置されており、これら複数のヘッド構成体11,12は一列に並べられて相互間は後述するように屈曲可能に連結され、屈曲ヘッド13を構成している。
【0018】
屈曲ヘッド13の先端側と基端側に配置されているヘッド構成体11を除いて、屈曲ヘッド13の中間部分に位置する4個のヘッド構成体12には、上方から順に、上向きに超音波を出射する超音波探触子14、下向きに超音波を出射する超音波探触子14、ヘッド構成体12の方向へ超音波を出射する超音波探触子14、ヘッド構成体12の接線方向へ超音波を出射する超音波探触子14,14がいずれも後述するように交換可能に装着されている。
【0019】
ヘッド構成体12,11は外形が略円筒状に作られていて、その上面には、孔を穿設した1対のブラケット15が向き合って固着されており、また、その下面には、孔を穿設した1対のブラケット16が、上記1対のブラケット15の向き合っている方向に直交する方向で向き合うように固着されている。
【0020】
上記の超音波探触子14を装着するヘッド構成体12には、図3、図4に示すように超音波探触子14(図1参照)を嵌め込むための収納空間17が設けてあって、収納空間17内に超音波探触子14を嵌め込んだ後、蓋18(図3参照)で収納空間17を塞ぎ、図示しないビスを蓋18の縁部に通してねじ孔19(図4参照)に螺合して蓋18をヘッド構成体12に固定し、ヘッド構成体12の内部に超音波探触子14を装着するようになっている。
【0021】
そして、ビスをねじ孔19から抜いて蓋18をヘッド構成体12から取り外すことにより、内部の超音波探触子14を交換することが可能になる。
【0022】
図5に示す超音波探触子14を装着しないヘッド構成体11は、収納空間17を有しない単なる略円筒状に形成されたものになっている。
【0023】
これらのヘッド構成体12,11は、図6に示すように、十字型をした自在継手20の端部をブラケット15,16に枢着させることにより、複数のヘッド構成体11,12は図1に示すように一列に並べられて相互間は屈曲可能に連結され、屈曲ヘッド13を構成することになる。
【0024】
なお、図1において最下端には、駆動機構の連結棒を接続するための継手部材10が設けられていて、ヘッド構成体11と継手部材10との間も自在継手20により、屈曲可能に連結されている。
【0025】
図7に示すように、ヘッド構成体11,12の外周には第1のガイド部材21が取り付けられている。
【0026】
第1のガイド部材21は、合成樹脂等の弾力性に富んだ帯状体を弓型に緩やかに湾曲したもので、帯状体の第1のガイド部材21を、図7に示すように例えば4個をヘッド構成体11,12の外周に縦長に等角度で配置し、第1のガイド部材21の両端部をヘッド構成体11,12の中心側に屈折して、ビス22によりヘッド構成体11,12の端面に取り付けている。
【0027】
更に、隣接するヘッド構成体11,12の間、及び継手部材10とヘッド構成体11との間に介在するように、第2のガイド部材23が取り付けられている。
【0028】
第2のガイド部材23は、合成樹脂などの弾力性に富んだ帯状体を小さな曲率半径でヘッド構成体11,12の外側に張り出すように屈曲したもので、図7に示すように、第1のガイド部材21の間に位置するように配置し、第2のガイド部材23の両端部を、ヘッド構成体11,12の端面に近い側面にビスで取り付けたものである。
【0029】
第2のガイド部材23は、その弾力で隣接するヘッド構成体11,12及び最下端の継手部材10とヘッド構成体11とを、互いに離反する方向へ付勢している。
【0030】
この第2のガイド部材23によって、自在継手20の端部とブラケット15,16の孔との間に間隙があっても、各ヘッド構成体11,12及び継手部材10は、相互間にがたつきを生ずることなく屈曲可能に連結された状態を保持して屈曲ヘッド13を構成することになる。
【0031】
また、第2のガイド部材23の外側に張り出している部分は、屈曲ヘッド13を検査すべき管に挿入した際に、管の内面に密接して摺動し得るように屈曲している。
【0032】
次に、上述した管探傷装置の使用状態を説明する。
【0033】
屈曲ヘッド13を、先端側のヘッド構成体11から検査すべき管の中に挿入したうえ、基端側の継手部材10に接続した図示しない駆動機構の連結棒を介して、検査すべき管の先端側へ向かって移動させる。
【0034】
図2に示すように、管1の軸線が屈曲していても、隣接するヘッド構成体11,12及び最下端の継手部材10とヘッド構成体11とを連結している自在継手20により、屈曲ヘッド13の軸線は管1の軸線に順応して屈曲状態になる。
【0035】
このとき、第2のガイド部材23は、屈曲の内側に位置するものは曲率半径が小さくなって屈曲が強くなり、屈曲の外側に位置するものは曲率半径が大きくなって屈曲が少なくなるように変形し、隣接するヘッド構成体11,12及び最下端の継手部材10とヘッド構成体11を、互いに離反する方向へ付勢する弾力を保っている。
【0036】
ヘッド構成体11,12の外周に取り付けられている第1のガイド部材21は、管1の屈曲部においてヘッド構成体11,12が管1の内面に直接接して摺動しないようにヘッド構成体11,12を保護し、第1のガイド部材21の弾力により管1の内面に対する傷付きを防止しつつ、ヘッド構成体11,12を管1に同軸に位置させることになる。
【0037】
上述したように管1の軸線が屈曲していても、屈曲ヘッド13の軸線は図2に示すように管1の軸線に順応して屈曲し、且つ、ヘッド構成体11,12相互間及び継手部材10とヘッド構成体11との間は、がたつきを生ずることなく屈曲可能に連結された状態を保持しているので、各超音波探触子14から管1内面へ超音波を出射し、また、駆動機構を操作することにより屈曲ヘッド13を管1の周方向へ回動させて各超音波探触子14が出射する超音波の向きを変化させれば、屈曲ヘッド13は管1の屈曲箇所と競合することなく管軸線方向への移動及び管周方向への回動をすることが可能であり、軸線が屈曲している管の探傷を行うことができる。
【0038】
更に、屈曲ヘッド13を管軸線方向へ移動させる際には、屈曲ヘッド13の両端に連結してある超音波探触子14を装着しないヘッド構成体11が、屈曲している管軸線に沿って屈曲ヘッド13を円滑に通過させ、また、ヘッド構成体11と第2のガイド部材23とによって、ヘッド構成体12を管1に同軸に位置させることができる。
【0039】
なお、本発明の管探傷装置は上述した実施の形態のみに限定されるものではなく、探触子の数を変更すること、その他、本発明の要旨を逸脱しない範囲において種々の変更を加え得ることは勿論である。
【0040】
【発明の効果】
以上述べたように、本発明の管探傷装置によれば、下記のような種々の優れた効果を奏し得る。
【0041】
(1)本発明の請求項1乃至請求項3に記載の管探傷装置のいずれにおいても、管の軸線が屈曲しても超音波探触子を装着した複数のヘッド構成体が自在継手で連結された部分で屈曲し、がたつきを生ずることなく管の内面に順応しながら超音波により管の傷を探傷することができる。
【0042】
(2)本発明の請求項2に記載の管探傷装置においては、1個の超音波探触子が故障した場合に、全体の屈曲ヘッドを交換する必要がなく、故障した超音波探触子のみを交換するだけで済み、保守費を軽減することができる。
【0043】
(3)本発明の請求項3に記載の管探傷装置においては、超音波探触子を装着した複数のヘッド構成体は、両端に連結されている超音波探触子を装着していないヘッド構成体に誘導されて、屈曲している管の内面に沿って円滑に移動できる。
【図面の簡単な説明】
【図1】本発明の実施の形態の一例を示す側面図である。
【図2】本発明の実施の形態の一例の使用状態を示す側面図である。
【図3】超音波探触子を装着するヘッド構成体の実施の形態の一例を示す側面図である。
【図4】図3をIV方向から見た正面図である。
【図5】超音波探触子を装着しないヘッド構成体の実施の形態の一例を示す側面図である。
【図6】ヘッド構成体を自在継手を介して連結した部分の側面図である。
【図7】図1のVII−VII線における水平断面図である。
【図8】従来の管探傷装置の一例を示す側面図である。
【符号の説明】
11,12 ヘッド構成体
13 屈曲ヘッド
14 超音波探触子
20 自在継手
21 第1のガイド部材
23 第2のガイド部材
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tube flaw detector that detects flaws in a tube with ultrasonic waves.
[0002]
[Prior art]
FIG. 8 shows an example of a conventional tube flaw detector. In this tube flaw detector, a cylindrical sensor case 2 that can be inserted into a tube 1 to be inspected is placed on the tip side of the tube 1 obliquely to the tube axis. A tube axis direction probe 3 that emits sound waves, a tube axis direction probe 4 that emits ultrasonic waves obliquely to the tube axis toward the proximal end of the tube 1, and an ultrasonic wave in the radial direction of the tube 1 The exiting tube radial direction probe 5 and the tube tangential direction probes 6 and 7 for emitting ultrasonic waves in the tangential direction of the tube 1 are incorporated in a line in the tube axis direction.
[0003]
Centering guides 8 and 9 for attaching the center of the sensor case 2 to the tube axis when the sensor case 2 is inserted into the tube 1 are mounted on the distal end portion and the base end portion of the sensor case 2.
[0004]
The alignment guide 9 on the proximal end side is provided with a joint member 10 for connecting a connecting rod of a drive mechanism disposed on the proximal end side of the pipe 1.
[0005]
When the pipe 1 is inspected, the joint member 10 of the above-described tube flaw detector is connected to the connecting rod of the drive mechanism, and the connecting mechanism is operated to move the connecting rod toward the distal end side of the tube 1. The tube flaw detector is inserted into a predetermined position of the tube 1 by being moved.
[0006]
Next, ultrasonic waves are emitted from the probes 3, 4, 5, 6 and 7 to the inner surface of the tube 1, and the tube 1 is flawed.
[0007]
Further, by operating the drive mechanism, the connecting rod is rotated in the circumferential direction of the tube 1 to change the direction of the ultrasonic waves emitted from the probes 3, 4, 5, 6 and 7, and the tube 1 Is inspected all around.
[0008]
[Problems to be solved by the invention]
However, the tube flaw detector shown in FIG. 8 has a structure in which a plurality of probes 3, 4, 5, 6, 7 are incorporated in a single sensor case 2, which is caused by deformation at the time of welding. If the tube axis is bent, the sensor case 2 and the inner surface of the tube 1 compete to move the probes 3, 4, 5, 6, and 7 in the tube axis direction. The directions of the ultrasonic waves emitted by 4, 5, 6, and 7 cannot be changed.
[0009]
The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a tube flaw detector that can handle a tube having a bent axis.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, in the tube flaw detector according to claim 1 of the present invention, a bending head in which a plurality of head constituents are arranged in a line and adjacent head constituents are flexibly connected via a universal joint, An ultrasonic probe attached to a predetermined head structure located in the middle part of the bending head, a first guide member attached to each head structure so as to be in contact with the inner surface of the tube to be inspected; And a second guide member interposed between the head structural bodies so as to urge adjacent head structural bodies away from each other and to slide in close contact with the inner surface of the tube to be inspected.
[0011]
In the tube flaw detector according to claim 2 of the present invention, the ultrasonic probe is attached to the head structure in a replaceable manner.
[0012]
In the tube flaw detector according to claim 3 of the present invention, a head structure to which an ultrasonic probe is not attached is connected to one end and the other end of the bending head.
[0013]
In any of the tube flaw detectors according to claims 1 to 3 of the present invention, a plurality of head structural bodies equipped with ultrasonic probes are bent at portions connected by universal joints, and the inner surface of the tube Even when the tube axis is bent, it can be moved while adapting to its inner surface.
[0014]
In the tube flaw detector according to claim 2 of the present invention, when one ultrasonic probe breaks down, it is not necessary to replace the entire bending head, and only the broken ultrasonic probe is replaced. To do.
[0015]
In the tube flaw detector according to claim 3 of the present invention, a head not equipped with an ultrasonic probe in which a plurality of head constituting bodies equipped with an ultrasonic probe are connected to both ends of a bending head. By the structure and the second guide member, it is positioned in a tube axis shape.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
1 to 7 show an example of an embodiment of the tube flaw detector according to the present invention. As shown in FIG. 1, one head structure 11 is arranged on the distal end side, and 4 is directly below it. The head structure bodies 12 are arranged in a line, and two head structure bodies 11 are further disposed on the base end side below the four head structure bodies 12, and the plurality of head structure bodies 11 are arranged. , 12 are arranged in a line and are connected to each other so as to be able to bend as will be described later, thereby forming a bending head 13.
[0018]
Except for the head structure 11 arranged on the distal end side and the proximal end side of the bending head 13, the four head structure bodies 12 positioned in the intermediate part of the bending head 13 are ultrasonicated upward in order from above. The ultrasonic probe 14 that emits ultrasonic waves, the ultrasonic probe 14 that emits ultrasonic waves downward, the ultrasonic probe 14 that emits ultrasonic waves in the direction of the head component 12, and the tangential direction of the head component 12 As will be described later, the ultrasonic probes 14 and 14 that emit ultrasonic waves are mounted so as to be replaceable.
[0019]
The head structural bodies 12 and 11 are formed in a substantially cylindrical shape, and a pair of brackets 15 having holes are fixed to face each other on the upper surface, and holes are formed on the lower surface. The pair of brackets 16 drilled are fixed so as to face each other in a direction orthogonal to the direction in which the pair of brackets 15 face each other.
[0020]
The head structure 12 to which the ultrasonic probe 14 is mounted is provided with a storage space 17 for fitting the ultrasonic probe 14 (refer to FIG. 1) as shown in FIGS. Then, after the ultrasonic probe 14 is fitted in the storage space 17, the storage space 17 is closed with a lid 18 (see FIG. 3), and a screw (not shown) is passed through the edge of the lid 18 to form a screw hole 19 (FIG. 4), the lid 18 is fixed to the head constituting body 12, and the ultrasonic probe 14 is mounted inside the head constituting body 12.
[0021]
Then, the internal ultrasonic probe 14 can be replaced by removing the screw from the screw hole 19 and removing the lid 18 from the head structure 12.
[0022]
The head structure 11 to which the ultrasonic probe 14 shown in FIG. 5 is not mounted is formed in a simple substantially cylindrical shape having no storage space 17.
[0023]
As shown in FIG. 6, these head components 12 and 11 are pivotally attached to brackets 15 and 16 so that the plurality of head components 11 and 12 are as shown in FIG. As shown in FIG. 4, the heads are arranged in a line and connected to each other so as to be able to bend, thereby forming a bending head 13.
[0024]
In FIG. 1, a joint member 10 for connecting a connecting rod of the drive mechanism is provided at the lowermost end, and the head structure 11 and the joint member 10 are also connected to bendable by a universal joint 20. Has been.
[0025]
As shown in FIG. 7, a first guide member 21 is attached to the outer periphery of the head constituting bodies 11 and 12.
[0026]
The first guide member 21 is formed by gently bending a belt-like body made of synthetic resin or the like into a bow shape. For example, four first guide members 21 of the belt-like body are provided as shown in FIG. Are disposed on the outer periphery of the head structure 11, 12 at an equal angle in the longitudinal direction, and both end portions of the first guide member 21 are refracted toward the center of the head structure 11, 12, and the head structure 11, It is attached to 12 end faces.
[0027]
Further, the second guide member 23 is attached so as to be interposed between the adjacent head constituting bodies 11 and 12 and between the joint member 10 and the head constituting body 11.
[0028]
The second guide member 23 is formed by bending a flexible band such as a synthetic resin so as to project outside the head constituting bodies 11 and 12 with a small radius of curvature. As shown in FIG. It arrange | positions so that it may be located between the 1 guide members 21, and the both ends of the 2nd guide member 23 are attached to the side surface near the end surface of the head structure 11 and 12 with the bis | screw.
[0029]
The second guide member 23 urges the adjacent head constituting bodies 11 and 12 and the joint member 10 at the lowermost end and the head constituting body 11 in a direction away from each other by its elasticity.
[0030]
Even if there is a gap between the end portion of the universal joint 20 and the holes of the brackets 15 and 16, the head guide bodies 11 and 12 and the joint member 10 are separated from each other by the second guide member 23. The bending head 13 is configured while maintaining a state in which it can be bent without causing sticking.
[0031]
Further, the portion of the second guide member 23 that protrudes to the outside is bent so that it can slide in close contact with the inner surface of the tube when the bending head 13 is inserted into the tube to be inspected.
[0032]
Next, the use state of the above-described tube flaw detector will be described.
[0033]
The bending head 13 is inserted into the tube to be inspected from the head structure 11 on the distal end side, and the tube of the tube to be inspected is connected through a connecting rod of a driving mechanism (not shown) connected to the joint member 10 on the proximal end side. Move toward the tip side.
[0034]
As shown in FIG. 2, even if the axis of the tube 1 is bent, it is bent by the universal joint 20 that connects the adjacent head constituent bodies 11 and 12 and the joint member 10 at the lowermost end and the head constituent body 11. The axis of the head 13 is bent in conformity with the axis of the tube 1.
[0035]
At this time, the second guide member 23 is located on the inner side of the bend, so that the radius of curvature becomes smaller and the bend becomes stronger, and the one located on the outer side of the bend has a larger radius of curvature and less bent. Deformation is maintained, and the elastic force is applied to urge the adjacent head constituent bodies 11 and 12 and the joint member 10 at the lowermost end and the head constituent body 11 away from each other.
[0036]
The first guide member 21 attached to the outer periphery of the head structure 11, 12 is configured so that the head structure 11, 12 does not slide directly in contact with the inner surface of the tube 1 at the bent portion of the tube 1. The head constituting bodies 11 and 12 are coaxially positioned on the tube 1 while protecting the surfaces 11 and 12 and preventing the inner surface of the tube 1 from being damaged by the elasticity of the first guide member 21.
[0037]
As described above, even if the axis of the tube 1 is bent, the axis of the bending head 13 is bent in conformity with the axis of the tube 1 as shown in FIG. Since the member 10 and the head structure 11 are held in a state where they are flexibly connected without causing rattling, ultrasonic waves are emitted from the ultrasonic probes 14 to the inner surface of the tube 1. Further, if the bending head 13 is rotated in the circumferential direction of the tube 1 by operating the driving mechanism to change the direction of the ultrasonic wave emitted from each ultrasonic probe 14, the bending head 13 is moved to the tube 1. It is possible to move in the direction of the tube axis and rotate in the direction of the tube without competing with the bent portion of the tube, and it is possible to detect a tube whose axis is bent.
[0038]
Furthermore, when the bending head 13 is moved in the tube axis direction, the head structure 11 that does not have the ultrasonic probe 14 connected to both ends of the bending head 13 moves along the bent tube axis. The bending head 13 can be smoothly passed, and the head structure 12 and the second guide member 23 can be positioned coaxially with the tube 1 by the head structure 11 and the second guide member 23.
[0039]
Note that the tube flaw detector of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention by changing the number of probes. Of course.
[0040]
【The invention's effect】
As described above, according to the tube flaw detector of the present invention, various excellent effects as described below can be obtained.
[0041]
(1) In any of the tube flaw detectors according to the first to third aspects of the present invention, a plurality of head components equipped with an ultrasonic probe are connected by a universal joint even if the axis of the tube is bent. It is possible to detect a flaw in the tube by ultrasonic waves while bending at the formed portion and adapting to the inner surface of the tube without causing rattling.
[0042]
(2) In the tube flaw detector according to claim 2 of the present invention, when one ultrasonic probe fails, it is not necessary to replace the entire bending head, and the failed ultrasonic probe. It is sufficient to replace only the maintenance cost.
[0043]
(3) In the tube flaw detector according to claim 3 of the present invention, the plurality of head components equipped with the ultrasonic probes are heads not equipped with the ultrasonic probes connected to both ends. Guided by the construct, it can move smoothly along the inner surface of the bent tube.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of an embodiment of the present invention.
FIG. 2 is a side view showing a use state of an example of an embodiment of the present invention.
FIG. 3 is a side view showing an example of an embodiment of a head structure to which an ultrasonic probe is attached.
4 is a front view of FIG. 3 viewed from the IV direction. FIG.
FIG. 5 is a side view showing an example of an embodiment of a head structure not equipped with an ultrasonic probe.
FIG. 6 is a side view of a portion where the head structure is connected via a universal joint.
7 is a horizontal sectional view taken along line VII-VII in FIG.
FIG. 8 is a side view showing an example of a conventional tube flaw detector.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11, 12 Head structure 13 Bending head 14 Ultrasonic probe 20 Universal joint 21 1st guide member 23 2nd guide member

Claims (3)

複数のヘッド構成体を一列に並べ且つ隣接するヘッド構成体を自在継手を介して屈曲可能に連結した屈曲ヘッドと、当該屈曲ヘッドの列中間部分に位置する所定のヘッド構成体に装着した超音波探触子と、検査すべき管の内面に当接し得るように各ヘッド構成体に取り付けた第1のガイド部材と、隣接するヘッド構成体を互いに離反する方向へ付勢し且つ検査すべき管の内面に密接して摺動し得るようにヘッド構成体間に介在させた第2のガイド部材とを備えてなることを特徴とする管探傷装置。A bending head in which a plurality of head constituents are arranged in a row and adjacent head constituents are connected so as to be bendable via a universal joint, and an ultrasonic wave attached to a predetermined head constituent located at the middle portion of the row of the bending heads A probe, a first guide member attached to each head structure so as to be in contact with the inner surface of the pipe to be inspected, and a pipe to be inspected by urging adjacent head constituents away from each other And a second guide member interposed between the head structural bodies so as to be able to slide in close contact with the inner surface of the tube flaw detector. ヘッド構成体に超音波探触子を交換可能に装着した請求項1に記載の管探傷装置。The tube flaw detector according to claim 1, wherein an ultrasonic probe is replaceably attached to the head structure. 屈曲ヘッドの一端と他端に、それぞれ超音波探触子が装着されていないヘッド構成体を連結した請求項1に記載の管探傷装置。The tube flaw detector according to claim 1, wherein a head structure to which an ultrasonic probe is not attached is connected to one end and the other end of the bending head.
JP2001151465A 2001-05-21 2001-05-21 Tube flaw detector Expired - Fee Related JP4631208B2 (en)

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Publication number Priority date Publication date Assignee Title
JP4869079B2 (en) * 2005-01-14 2012-02-01 パナソニック株式会社 Ultrasonic flaw detection method and ultrasonic flaw detection apparatus
CN103091400B (en) * 2013-01-11 2014-11-19 浙江大学 Bent steel tube automatic flaw detection system based on ultrasonic detection
CN103091399B (en) * 2013-01-11 2014-10-15 浙江大学 Bent steel tube ultrasonic automatic detecting system
CN114280151B (en) * 2021-12-28 2024-04-16 河北大唐国际丰宁风电有限责任公司 Telescopic ultrasonic flaw detector

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JPS6235258U (en) * 1985-08-22 1987-03-02
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JPS59126946A (en) * 1983-01-10 1984-07-21 Hitachi Ltd Ultrasonic probe to be inserted into pipe
JPS6235258U (en) * 1985-08-22 1987-03-02
JPH0232252A (en) * 1988-07-22 1990-02-02 Power Reactor & Nuclear Fuel Dev Corp Ultrasonic flaw detecting device for inside of branch piping
JPH02117463A (en) * 1988-10-26 1990-05-01 Kubota Ltd In-pipe travelling device
JPH03208765A (en) * 1990-01-11 1991-09-11 Kyushu Electric Power Co Inc Piping inside checking method using moving robot
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