JPH04264256A - Piping flaw sensor - Google Patents
Piping flaw sensorInfo
- Publication number
- JPH04264256A JPH04264256A JP7736791A JP7736791A JPH04264256A JP H04264256 A JPH04264256 A JP H04264256A JP 7736791 A JP7736791 A JP 7736791A JP 7736791 A JP7736791 A JP 7736791A JP H04264256 A JPH04264256 A JP H04264256A
- Authority
- JP
- Japan
- Prior art keywords
- flaw detection
- leaf spring
- pipe
- piping
- coil
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 68
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 238000007689 inspection Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Pipeline Systems (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は配管内を走行させて管外
面の腐食減肉等の検出をする配管探傷装置の配管探傷セ
ンサに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping flaw detection sensor for a piping flaw detection device that travels inside the pipe to detect corrosion and thinning on the outer surface of the pipe.
【０００２】0002
【従来の技術】実際、使用状況にある、液体、気体を流
通させるための管（活管）には、充分な安全維持管理が
不可欠である。そのために、所定期間ごとに管の状態を
検査し、その管の損傷状態をチェックして損傷した部分
を早期に且つ確実に発見するようにし、その部分の交換
を行なうという点検保守作業がなされている。2. Description of the Related Art In fact, sufficient safety maintenance and management is essential for pipes (live pipes) for distributing liquids and gases that are in use. To this end, inspection and maintenance work is carried out in which the condition of the pipes is inspected at regular intervals, the state of damage to the pipes is checked, damaged parts are discovered early and reliably, and the damaged parts are replaced. There is.
【０００３】管の損傷状態をチェックするような場合、
目視によって損傷状態を調査することは不確実であり、
実際上、不可能である。また、液体、気体等を遮断して
行うのは様々な不都合が伴うので、液体、気体を流通さ
せた状態（活管）において行うようにするのが望ましい
。
そのために、管内に検査用センサを活管挿入装置を介し
て挿入し、管外面の腐食減肉の程度を電磁気的な方法に
より検知し、管体の状態を診断する手段が採用されてい
る。そのような電磁気的な検出手段として、例えば、■
ケーブルの先端に設けられた送信コイルから受信コイル
までの電磁波の伝播時間の変化により検出する方式、■
ケーブルの先端に設けたコイルに交流電流を流し、電磁
誘導により管体に発生させた渦電流の変化から検出する
方式、等を列挙することができる。[0003] When checking the damage state of a pipe,
Visually inspecting damage conditions is uncertain;
In practice, it is impossible. Furthermore, since there are various inconveniences associated with carrying out the process while cutting off the liquid, gas, etc., it is desirable to carry out the process while the liquid or gas is flowing (in a live pipe). For this purpose, a method is adopted in which an inspection sensor is inserted into the pipe via a live pipe insertion device, the degree of corrosion thinning on the outer surface of the pipe is detected by an electromagnetic method, and the condition of the pipe body is diagnosed. As such an electromagnetic detection means, for example, ■
A method that detects changes in the propagation time of electromagnetic waves from the transmitter coil installed at the end of the cable to the receiver coil, ■
Examples include a method in which an alternating current is passed through a coil provided at the tip of a cable, and detection is detected from changes in eddy current generated in the tube body due to electromagnetic induction.
【０００４】0004
【発明が解決しようとする課題】しかしながら、前述の
ようなケーブルを管内に挿入して走行させる場合、管の
接続部分や、障害物等により、走行が妨げられるときが
ある。また、検知コイルの支持部材の管内壁への接触性
が悪いと、検知信号の変動および雑音信号の混入をもた
らし、検知性能が悪化する。また、電磁気的に検知する
方式なので、検知コイルの支持部材の素材を考慮する必
要がある。本発明では、以上の点を改良し、管内、特に
活管内に容易に挿入できると共に管内の通過性を向上さ
せ、検知コイルの支持部材の管内壁への接触性を高め、
確実な検知特性を確保した配管探傷装置の配管探傷セン
サを提供することを目的とする。However, when the above-mentioned cable is inserted into a pipe and run, the cable may be obstructed by the connection part of the pipe or an obstacle. In addition, if the contact of the support member of the detection coil to the inner wall of the tube is poor, the detection signal fluctuates and noise signals are mixed in, resulting in deterioration of detection performance. Furthermore, since it is an electromagnetic detection method, it is necessary to consider the material of the support member of the detection coil. The present invention improves the above points, allows easy insertion into a pipe, especially a live pipe, improves passage through the pipe, and improves contact of the support member of the detection coil with the inner wall of the pipe.
The object of the present invention is to provide a piping flaw detection sensor for a piping flaw detection device that ensures reliable detection characteristics.
【０００５】[0005]
【課題を解決するための手段】前記した課題を解決する
ために、本発明は、管体内に管体の探傷手段を設けたケ
ーブルを挿入して管の損傷箇所を検出する配管探傷装置
において、前記ケーブルの先端部に、前記探傷手段およ
びガイド先端部材を、それぞれ、コイルスプリング管を
介して接続構成し、前記探傷手段は、ケーブル軸方向に
長手方向を合わせて円筒を形成すると共に中央部内側に
それぞれ検知コイルが配設された複数の板ばね部材を具
備し、これら板ばね部材は、中央部を拡径的に張り出さ
せるように、板ばね部材両端部をコイルスプリング管に
取り付けられた第１、第２の保持部材にそれぞれ取着す
る構成としたものである。また、前記第１、第２保持部
材に、板ばね部材の両端部間を押し縮める方向に押圧す
る第１、第２の圧縮ばね部材を設けることも可能である
。また、本発明は、前記検知コイルを、互いに並列接続
して一つの並列回路を構成することを特徴とするもので
ある。また、前記板ばね部材は、非磁性体であることを
特徴とするものである。さらに、前記板ばね部材は、表
面が滑動部材によって被覆されたものである。[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a pipe flaw detection device that detects damaged locations in a pipe by inserting a cable provided with a pipe body flaw detection means into a pipe body. The flaw detection means and the guide tip member are connected to the distal end of the cable via coil spring tubes, and the flaw detection means forms a cylinder with its longitudinal direction aligned with the cable axis direction, and the flaw detection means is arranged to form a cylinder with its longitudinal direction aligned with the cable axis direction. A plurality of leaf spring members each having a detection coil arranged thereon are provided, and both ends of the leaf spring member are attached to a coil spring tube so that the central part of the leaf spring member is radially expanded. It is configured to be attached to the first and second holding members, respectively. Further, it is also possible to provide the first and second holding members with first and second compression spring members that press in a direction to compress both ends of the leaf spring member. Further, the present invention is characterized in that the detection coils are connected in parallel to each other to form one parallel circuit. Further, the leaf spring member is made of a non-magnetic material. Furthermore, the surface of the leaf spring member is covered with a sliding member.
【０００６】[0006]
【作用】ケーブルは、先端にガイド先端部材が設けられ
、また、コイルスプリング管は、曲げに対する復元性が
あるので、活管挿入装置から、容易に差し入れが可能で
ある。なお、調査すべき管の内径を考慮し、板ばね部材
の中央部の張り出した径を若干大きなものと設定してお
けば、管壁への接触性と通過性を損なうことなく、円滑
且つ正確な検知が可能である。さらに、第１、第２の保
持部材に第１、第２圧縮ばね部材を設ければ、板ばね部
材の張出し力を補助強化することができる。前記板ばね
部材は、円筒を形成し、円周上に等間隔毎に存在するの
で、管壁面を満遍なく検査することができ、管内に探傷
手段が挿入されても、液体、気体等の通過は可能であり
、液体、気体等の流通した状態にて検査が可能である。
また、板ばね部材は、中央部の張出し力に抗して、管壁
における障害物からの力により、縮径的に変形すること
ができ、多少の障害物を乗り越えられるので、通過性が
損なわれることはない。また、板ばね部材の管壁との接
触面に滑動部材を設けると、尚、好都合である。 さ
らに、板ばね部材は、非磁性体により構成すれば、磁気
的な影響は受けないので、正確な検出が可能となる。[Operation] The cable is provided with a guide tip member at its tip, and the coil spring tube has resilience against bending, so it can be easily inserted from the live tube insertion device. In addition, if you consider the inner diameter of the pipe to be investigated and set the protruding diameter of the central part of the leaf spring member to be slightly larger, it will be possible to conduct the inspection smoothly and accurately without impairing contact and passage to the pipe wall. detection is possible. Furthermore, if the first and second compression spring members are provided on the first and second holding members, the tensioning force of the leaf spring member can be supplemented and strengthened. The leaf spring members form a cylinder and are arranged at equal intervals on the circumference, so the tube wall surface can be inspected evenly, and even if the flaw detection means is inserted into the tube, liquid, gas, etc. will not pass through. This is possible, and inspection can be performed in a state where liquid, gas, etc. are circulating. In addition, the leaf spring member can be deformed in a diameter-reduced manner by the force from obstacles on the pipe wall against the tension force in the central part, and can overcome some obstacles, which impairs the passability. It won't happen. It is also advantageous to provide a sliding member on the contact surface of the leaf spring member with the tube wall. Furthermore, if the leaf spring member is made of a non-magnetic material, it will not be affected by magnetism, allowing accurate detection.
【０００７】[0007]
【実施例】次に、本発明にかかる配管探傷センサについ
て、一実施例を挙げ、添付の図面を参照しながら以下説
明する。図１において、参照符号１は実際に使用されて
いる管２の損傷状態を検知する配管探傷装置の配管探傷
センサを示す。尚、この配管探傷装置は、渦流式といわ
れるものである。配管探傷センサ１は、ケーブル３の先
端部に探傷手段４およびガイド先端部材５を、それぞれ
、コイルスプリング管６を介して接続構成したものであ
る。前記探傷手段４は、ケーブル３の軸方向に長手方向
を合わせて円筒状に配した複数の板ばね部材７の両端部
を、板ばね部材７の長さに比較して小なる間隔にてコイ
ルスプリング管６に取り付けられた第１、第２の保持部
材８、９に取着すると共に、前記板ばね部材７の中央部
を張り出させる構成とし、板ばね部材７の中央部内側に
それぞれ検知コイル１０を配設したものである。前記第
１、第２保持部材８、９は、コイルスプリング管６に取
り付けられた接続部材１１ａ、１１ｂを、軸止め部材１
２ａ、１２ｂを介して板ばね部材７の両端部を取り付け
るスライドリング１３ａ、１３ｂに嵌入させ、軸部材１
４に螺着させた構成である（図２および図３参照）。前
記スライドリング１３ａ、１３ｂには、壁面に溝１５が
形成されており、軸部材１４における両端部近傍の突起
部１６が嵌合することでスライドリング１３ａ、１３ｂ
が軸部材１４廻りに回動するのを防止している（図３参
照）。前記軸止め部材１２ａ、１２ｂは、端部１７ａ、
１７ｂが軸部材１４の突起部１６に当接しており（図４
参照）、スライドリング１３ａ、１３ｂの動きを制限し
て、板ばね部材７の中央部を張り出す状態に維持してい
る。前記検知コイル１０は、それぞれの板ばね部材７の
中央部裏面に設けられた保持枠１８に取り付けられたも
ので（図５参照）、例えば、図６に示すように、直列接
続した一対のコイル１０ａ、１０ｂ（差動コイル）を互
いに並列接続して一つの並列回路を構成し、交流電流付
与手段である探傷器に接続される。探傷器は前記検知コ
イル１０に交流電流を供給して管体に渦電流を発生させ
、その変化を、検出することにより、貫通孔等の欠陥を
検知するものである。以上のように、本装置では電磁気
的検出方法を採用しているので、前記板ばね部材７は、
磁気的影響のない、非磁性体を適用する。この場合、板
ばね部材７には、弾性係数が大きければ、樹脂製のばね
部材を適用しても差し支えない。さらに、前記板ばね部
材７の管２体との接触表面に、滑動部材、例えば、フッ
素樹脂等によって被覆するようにしてもよい。[Embodiment] Next, an embodiment of the piping flaw detection sensor according to the present invention will be described below with reference to the attached drawings. In FIG. 1, reference numeral 1 indicates a pipe flaw detection sensor of a pipe flaw detection apparatus that detects the damage state of a pipe 2 that is actually used. Note that this piping flaw detection device is of the eddy current type. The piping flaw detection sensor 1 has a flaw detection means 4 and a guide tip member 5 connected to the tip of a cable 3 via a coil spring tube 6, respectively. The flaw detection means 4 coils both ends of a plurality of leaf spring members 7 arranged in a cylindrical shape with their longitudinal directions aligned with the axial direction of the cable 3 at intervals smaller than the length of the leaf spring members 7. It is attached to the first and second holding members 8 and 9 attached to the spring tube 6, and the central part of the leaf spring member 7 is made to protrude. A coil 10 is provided. The first and second holding members 8 and 9 hold the connection members 11a and 11b attached to the coil spring tube 6 against the shaft stopper member 1.
The shaft member 1 is fitted into slide rings 13a and 13b to which both ends of the leaf spring member 7 are attached via 2a and 12b.
4 (see FIGS. 2 and 3). A groove 15 is formed in the wall surface of the slide rings 13a, 13b, and when the protrusions 16 near both ends of the shaft member 14 fit into the slide ring 13a, 13b, the grooves 15 are formed in the wall surface.
The shaft member 14 is prevented from rotating around the shaft member 14 (see FIG. 3). The shaft stop members 12a, 12b have an end portion 17a,
17b is in contact with the protrusion 16 of the shaft member 14 (Fig.
), the movement of the slide rings 13a and 13b is restricted to maintain the central portion of the leaf spring member 7 in an extended state. The detection coil 10 is attached to a holding frame 18 provided on the back surface of the central part of each leaf spring member 7 (see FIG. 5), and for example, as shown in FIG. 10a and 10b (differential coils) are connected in parallel to each other to form one parallel circuit, which is connected to a flaw detector which is an alternating current applying means. The flaw detector supplies an alternating current to the detection coil 10 to generate an eddy current in the tubular body, and detects a change in the eddy current to detect a defect such as a through hole. As described above, since this device employs an electromagnetic detection method, the leaf spring member 7
Apply non-magnetic material that has no magnetic influence. In this case, a resin spring member may be used as the leaf spring member 7 as long as it has a large elastic modulus. Furthermore, the contact surface of the leaf spring member 7 with the two tubes may be coated with a sliding member such as a fluororesin.
【０００８】かかる配管探傷センサ１によれば、ケーブ
ル３は、先端にガイド先端部材５が設けられ、また、コ
イルスプリング管６によって、曲げに対する復元性が付
与されているので、活管挿入装置（図示せず）から、容
易に差し入れが可能である。なお、調査すべき管２の内
径を考慮し、板ばね部材７の中央部の張り出した径を若
干大きなものと設定しておけば、管２壁への接触性と通
過性を損なうことなく、円滑且つ正確な検知が可能であ
る。その際、板ばね部材７は、中央部の張出し力に抗し
て、管２壁における障害物により縮径的に変形すること
ができ、多少の障害物を乗り越えられるので、通過性が
損なわれることはない。前記板ばね部材７は、円筒を形
成し、円周上に等間隔毎に存在するので、管２壁面を満
遍なく検査することができ、管２内に探傷手段４が挿入
されても、液体、気体等の通過は可能であり、液体、気
体等の流通した状態にて検査が可能である。 また、
板ばね部材７は、非磁性体なので、検出に際して、磁気
的な妨害はなく、正確な検出が可能である。さらに、板
ばね部材７の管２体との接触表面に、滑動部材、例えば
、フッ素樹脂等によって被覆すると、板ばね部材７の耐
摩耗性は向上し、しかも、潤滑性が向上するので、通過
性が格段に改善され、押し込み、引き出す際の力を軽減
することができ、走行手段の負担の軽減、ひいては、作
業能率の向上を図ることが可能となる。According to the piping flaw detection sensor 1, the cable 3 is provided with the guide tip member 5 at its tip, and is given resilience against bending by the coil spring tube 6. (not shown) can be easily inserted. In addition, by considering the inner diameter of the pipe 2 to be investigated and setting the protruding diameter of the central part of the leaf spring member 7 to be slightly larger, it is possible to avoid impairing contact and passage to the wall of the pipe 2. Smooth and accurate detection is possible. At this time, the leaf spring member 7 can be deformed in a diameter-reduced manner by obstacles on the wall of the tube 2 against the tension force in the central portion, and can overcome some obstacles, so that the passability is impaired. Never. Since the plate spring members 7 form a cylinder and are arranged at equal intervals on the circumference, the wall surface of the tube 2 can be inspected evenly, and even if the flaw detection means 4 is inserted into the tube 2, the liquid, Gas, etc. can pass through it, and inspection can be performed in a state where liquid, gas, etc. are flowing. Also,
Since the leaf spring member 7 is a non-magnetic material, there is no magnetic interference during detection and accurate detection is possible. Furthermore, if the contact surface of the leaf spring member 7 with the two tubes is coated with a sliding member, such as a fluororesin, the wear resistance of the leaf spring member 7 will be improved, and the lubricity will be improved, so that It is possible to reduce the force required for pushing in and pulling out, reducing the burden on the traveling means, and ultimately improving work efficiency.
【０００９】以上、一実施例を挙げて説明したが、別の
実施例として、図７に示すような構成の配管探傷センサ
２０を挙げることができる。尚、かかる配管探傷センサ
２０において、前述の実施例における前記配管探傷セン
サ１を構成する要素と、実質的に同一の要素には、同符
号を付してその説明を省略するものとする。Although one embodiment has been described above, a pipe flaw detection sensor 20 having a configuration as shown in FIG. 7 can be cited as another embodiment. In this piping flaw detection sensor 20, elements that are substantially the same as those constituting the piping flaw detection sensor 1 in the above-described embodiment are given the same reference numerals, and their explanations will be omitted.
【００１０】図に示されるように、配管探傷センサ２０
においては、第１、第２保持部材８、９に、板ばね部材
７を両端部を介して押し縮める方向に押圧する第１、第
２の圧縮ばね部材２１、２２を設ける構成としたもので
ある。すなわち、第１、第２保持部材８、９の接続部材
１１ａ、１１ｂを、コイルスプリング管６をおねじとす
るめねじ部材として移動調節できる構成とし、第１、第
２圧縮ばね部材２１、２２を、接続部材１１ａ、１１ｂ
と軸止め部材１２ａ、１２ｂの間に介在させるようにし
たものである。かかる配管探傷センサ２０によれば、第
１、第２圧縮ばね部材２１、２２は、接続部材１１ａ、
１１ｂをコイルスプリング管６上において移動させるこ
とにより、ばね全長が調整され、板ばね部材７の張出し
度を調節することができるので、一層、板ばね部材７の
管２壁への接触性が向上して、検知性能は、安定且つ向
上することとなる。As shown in the figure, a piping flaw detection sensor 20
, the first and second holding members 8 and 9 are provided with first and second compression spring members 21 and 22 that press the leaf spring member 7 in the direction of compressing it through both ends. be. That is, the connection members 11a and 11b of the first and second holding members 8 and 9 are configured to be movable and adjustable as female threaded members with the coil spring tube 6 as the male thread, and the first and second compression spring members 21 and 22 are configured to be movable and adjustable. , connection members 11a, 11b
and the shaft stop members 12a, 12b. According to this piping flaw detection sensor 20, the first and second compression spring members 21 and 22 are connected to the connecting member 11a,
By moving 11b on the coil spring tube 6, the overall length of the spring can be adjusted and the degree of protrusion of the leaf spring member 7 can be adjusted, which further improves the contact of the leaf spring member 7 with the wall of the tube 2. As a result, the detection performance is stabilized and improved.
【００１１】このように、実施例を挙げて説明したが、
検知コイル１０は、単なる一つのコイルをそれぞれ並列
接続したものでも適用可能である。[0011] Although the explanation has been given with examples as described above,
The detection coil 10 may be a single coil connected in parallel.
【００１２】0012
【発明の効果】以上の通り、本発明によれば、探傷手段
の複数の板ばね部材の弾力的な張出しにより、検知性能
を損なうことなく、板ばね部材の弾性によって、管内の
多少の障害物を乗り越えられるので、通過性を向上させ
ることができ、作業能率の高いものとなる。また、板ば
ね部材は、等間隔毎に配設されているので、管壁面を満
遍なく検査することができ、また、管内に探傷手段が挿
入されても、液体、気体等の通過は可能であり、液体、
気体等の流通した状態にて検査が可能である。さらに、
板ばね部材の管壁との接触面に滑動部材を設けると、板
ばね部材の摩耗を防止することができ、一層、通過性の
向上が達成される。このように、本発明にかかる配管探
傷センサを適用することにより、結果として、安全維持
管理の合理化、費用の抑制化、保安の向上に大きな効果
を奏する。As described above, according to the present invention, the elasticity of the plurality of leaf spring members of the flaw detection means allows the elasticity of the leaf spring members to detect obstacles in the pipe without impairing the detection performance. Since it is possible to overcome this, it is possible to improve the passability, resulting in high work efficiency. In addition, since the leaf spring members are arranged at equal intervals, the pipe wall surface can be inspected evenly, and even if the flaw detection means is inserted into the pipe, liquids, gases, etc. can pass through. ,liquid,
Inspection can be performed in a state where gas, etc. is flowing. moreover,
By providing a sliding member on the contact surface of the leaf spring member with the tube wall, wear of the leaf spring member can be prevented and passage performance can be further improved. As described above, by applying the piping flaw detection sensor according to the present invention, as a result, significant effects are achieved in streamlining safety maintenance management, reducing costs, and improving safety.
【００１３】[0013]
【図１】本発明にかかる配管探傷センサの全体側面図で
ある。FIG. 1 is an overall side view of a piping flaw detection sensor according to the present invention.
【図２】本発明にかかる配管探傷センサの要部分解説明
図である。FIG. 2 is an exploded explanatory diagram of essential parts of a piping flaw detection sensor according to the present invention.
【図３】図２に示すスライドリングの断面説明図である
。FIG. 3 is an explanatory cross-sectional view of the slide ring shown in FIG. 2;
【図４】図１および図２に示す配管探傷センサの要部側
面説明図である。4 is an explanatory side view of a main part of the piping flaw detection sensor shown in FIGS. 1 and 2. FIG.
【図５】板ばね部材の側面説明図である。FIG. 5 is an explanatory side view of the leaf spring member.
【図６】検知コイルの結線回路図である。FIG. 6 is a wiring circuit diagram of a detection coil.
【図７】本発明にかかる配管探傷センサの別の実施例を
示す全体側面図である。FIG. 7 is an overall side view showing another embodiment of the piping flaw detection sensor according to the present invention.
１、２０ 配管探傷センサ２
管３
ケーブル４
コイルスプリング５
ガイド先端部材６
探傷手段７
板ばね部材８、９
第１、第２保持部材１０
検知コイル１０ａ、１０ｂ
コイル
１１ａ、１１ｂ 接続部材
１２ａ、１２ｂ 接続部材
１３ａ、１３ｂ スライドリング１４
ケーブル軸本体１５
溝１６
突起部１７ａ、１７ｂ 端部1, 20 Piping flaw detection sensor 2
tube 3
cable 4
coil spring 5
Guide tip member 6
Flaw detection means 7
Leaf spring members 8, 9
First and second holding members 10
Detection coils 10a, 10b
Coils 11a, 11b Connection members 12a, 12b Connection members 13a, 13b Slide ring 14
Cable shaft body 15
Groove 16
Projection parts 17a, 17b ends
Claims (5)
ケーブルを挿入して管の損傷箇所を検出する配管探傷装
置において、前記ケーブルの先端部に、前記探傷手段お
よびガイド先端部材を、それぞれ、コイルスプリング管
を介して接続構成し、前記探傷手段は、ケーブル軸方向
に長手方向を合わせて円筒を形成すると共に中央部内側
にそれぞれ検知コイルが配設された複数の板ばね部材を
具備し、これら板ばね部材は、中央部を拡径的に張り出
させるように、板ばね部材両端部をコイルスプリング管
に取り付けられた第１、第２の保持部材にそれぞれ取着
する構成としたものであることを特徴とする配管探傷セ
ンサ。1. A piping flaw detection device that detects a damaged part of a pipe by inserting a cable provided with a pipe body flaw detection means into a pipe body, wherein the flaw detection means and a guide tip member are respectively provided at the tip of the cable. , connected via a coil spring tube, and the flaw detection means includes a plurality of plate spring members whose longitudinal directions are aligned with the cable axis direction to form a cylinder, and each of which has a detection coil disposed inside the center thereof. , these leaf spring members are configured such that both ends of the leaf spring member are respectively attached to first and second holding members attached to a coil spring tube so that the center portion extends in a diametrical manner. A piping flaw detection sensor characterized by:
材に、板ばね部材の両端部間を押し縮める方向に押圧す
る第１、第２の圧縮ばね部材を設けたことを特徴とする
配管探傷センサ。2. The first and second holding members according to claim 1 are provided with first and second compression spring members that press in a direction to compress both ends of the leaf spring member. Piping flaw detection sensor.
いに並列接続して一つの並列回路を構成することを特徴
とする配管探傷センサ。3. A piping flaw detection sensor characterized in that the detection coils according to claim 1 are connected in parallel with each other to form one parallel circuit.
磁性体であることを特徴とする配管探傷センサ。4. A piping flaw detection sensor, wherein the leaf spring member according to claim 1 is made of a non-magnetic material.
を滑動部材によって被覆することを特徴とする配管探傷
センサ。5. A piping flaw detection sensor, characterized in that the surface of the leaf spring member according to claim 1 is covered with a sliding member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03077367A JP3072860B2 (en) | 1991-02-19 | 1991-02-19 | Piping flaw detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03077367A JP3072860B2 (en) | 1991-02-19 | 1991-02-19 | Piping flaw detection sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04264256A true JPH04264256A (en) | 1992-09-21 |
| JP3072860B2 JP3072860B2 (en) | 2000-08-07 |
Family
ID=13631937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03077367A Expired - Fee Related JP3072860B2 (en) | 1991-02-19 | 1991-02-19 | Piping flaw detection sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3072860B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012046611A1 (en) | 2010-10-04 | 2012-04-12 | 三菱重工業株式会社 | Device for monitoring thickness reduction of inner surface in heat transfer pipe or inner surface in evaporation pipe |
| JP2016524164A (en) * | 2013-07-10 | 2016-08-12 | スネクマ | Equipment for inspecting the surface of conductive parts |
-
1991
- 1991-02-19 JP JP03077367A patent/JP3072860B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012046611A1 (en) | 2010-10-04 | 2012-04-12 | 三菱重工業株式会社 | Device for monitoring thickness reduction of inner surface in heat transfer pipe or inner surface in evaporation pipe |
| US8743379B2 (en) | 2010-10-04 | 2014-06-03 | Mitsubishi Heavy Industries, Ltd. | Device for monitoring thickness reduction of inner surface in heat transfer tube or inner surface in evaporation tube |
| JP2016524164A (en) * | 2013-07-10 | 2016-08-12 | スネクマ | Equipment for inspecting the surface of conductive parts |
| US10101300B2 (en) | 2013-07-10 | 2018-10-16 | Safran Aircraft Engines | Device for inspecting a surface of an electrically conductive part |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3072860B2 (en) | 2000-08-07 |
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