JPH09257715A - Inspection apparatus for lining layer on inner surface of piping - Google Patents
Inspection apparatus for lining layer on inner surface of pipingInfo
- Publication number
- JPH09257715A JPH09257715A JP9615996A JP9615996A JPH09257715A JP H09257715 A JPH09257715 A JP H09257715A JP 9615996 A JP9615996 A JP 9615996A JP 9615996 A JP9615996 A JP 9615996A JP H09257715 A JPH09257715 A JP H09257715A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- lining layer
- lining
- traveling vehicle
- contactor
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、配管内面ライニン
グ層の検査装置に関し、更に詳細には、人の出入りでき
ない小径の配管のライニング層の検査であっても、配管
外から検査作業をサポートする必要がなく、自己完結的
に配管内面ライニング層を検査できる装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe inner surface lining layer inspection device, and more specifically, supports inspection work from outside the pipe even when inspecting a lining layer of a pipe having a small diameter that cannot be accessed by a person. The present invention relates to an apparatus capable of inspecting a pipe inner surface lining layer in a self-contained manner without the need.
【０００２】[0002]
【従来の技術】腐食性流体が金属製配管内を流れる場
合、配管内面が露出したままであると、管壁が腐食性流
体により腐食されるので、腐食防止対策として、例えば
ビニールエステル、エポキシ、ポリエチレン等の樹脂、
ゴム、或いはモルタル等の耐食性材料で配管内面をライ
ニングすることが多い。人が出入りできる大径の配管内
面には、人がスプレー、刷毛等のライニング施工器具を
使用して、人が出入りできない小径の配管内面には、ピ
グ式ライニング装置等を使用してライニングが施工され
ている。2. Description of the Related Art When a corrosive fluid flows in a metal pipe, if the inner surface of the pipe is exposed, the pipe wall is corroded by the corrosive fluid. Resin such as polyethylene,
The inner surface of the pipe is often lined with a corrosion resistant material such as rubber or mortar. The inside of a large-diameter pipe that allows people to come in and out uses lining construction equipment such as sprays and brushes, and the inside of a small-diameter pipe that does not allow people to enter and exit is lined using a pig-type lining device. Has been done.
【０００３】ピンホール、欠け、割れ、剥離等の欠陥が
ライニング層に存在すると、例えそれが小さなピンホー
ルであったとしても、腐食性流体がピンホールを通って
配管の管内面に到達し、そこを腐食する。配管の内面が
腐食されるに連れて、ライニング層が破壊され、剥離
し、益々腐食が進行する。これでは、ライニング層を施
した意味が無い。そこで、耐食性ライニング層の施工で
は、施工後のライニング層の欠陥検査が極めて重要であ
って、従来から検査装置を使用してライニング層を検査
している。When defects such as pinholes, chips, cracks, and peeling are present in the lining layer, corrosive fluid reaches the inner surface of the pipe through the pinholes, even if the pinholes are small. Corrodes there. As the inner surface of the pipe is corroded, the lining layer is broken and peeled off, and the corrosion progresses more and more. In this case, it is meaningless to apply the lining layer. Therefore, in the construction of the corrosion-resistant lining layer, it is extremely important to inspect the lining layer for defects after the construction, and conventionally, the lining layer has been inspected using an inspection device.
【０００４】人が出入りできない小径配管の内面ライニ
ングを検査する場合、走行車にピンホール検出装置を搭
載した検査装置を使用している。配管内面ライニングの
従来の検査装置では、いわゆるピンホール検出装置を走
行車に搭載して配管内に送入し、配管外から走行車に繋
いだケーブルにより、走行車の駆動用電力、ピンホール
検出装置に必要な低周波高圧パルス印加用電力を供給
し、また、配管外のオペレータとピンホール検出装置と
の間でピンホール検出装置が検出した欠陥の検出信号、
制御信号等を授受している。ピンホール検出装置は、図
７に示すように、接触子としてライニング層に接触する
金属ブラシと、高圧部と、検出部と、接地線を含む低周
波高圧パルス印加回路と、ピンホール検出装置本体とか
ら構成され、接触子、高圧部、検出部等は、走行車に搭
載されている。ピンホール検出装置本体は、操作盤、高
圧制御盤等を含む制御装置及びモニターとから構成され
ている。When inspecting the inner surface lining of a small-diameter pipe that cannot be accessed by people, an inspection device equipped with a pinhole detection device on a traveling vehicle is used. In the conventional inspection device for the inner lining of pipes, a so-called pinhole detection device is installed in the traveling vehicle and sent into the pipe, and the cable that connects the traveling vehicle from the outside of the pipe to the traveling vehicle drive power, pinhole detection Supplying the necessary low-frequency high-voltage pulse application power to the device, and detecting signals of defects detected by the pinhole detection device between the operator outside the pipe and the pinhole detection device,
It exchanges control signals. As shown in FIG. 7, the pinhole detection device includes a metal brush that contacts the lining layer as a contactor, a high voltage part, a detection part, a low frequency high voltage pulse application circuit including a ground wire, and a pinhole detection device body. The contactor, the high-voltage unit, the detection unit, and the like are mounted on the traveling vehicle. The pinhole detection device body is composed of a control device including an operation panel, a high-voltage control panel, and a monitor.
【０００５】配管内面ライニング層の検査では、図８に
示すように、配管及びライニング層は、接地線及び接地
子を通じて低周波高圧パルス印加回路の一部を構成し、
断続的な低周波高圧パルスが、高圧部によって金属ブラ
シと接地子との間に印加される。金属ブラシは、管壁の
ライニング層に沿って摺動しつつ欠陥を走査し、ライニ
ング層に存在するピンホールに到達すると、金属ブラシ
と配管との間で放電又は直接接触が生じて低周波高圧パ
ルス印加回路が閉回路となる。検出部は、低周波高圧パ
ルス印加回路が閉回路となって電流が流れたことを検知
し、制御ケーブルによって配管の外のピンホール検出装
置本体に検知信号を出力する。In the inspection of the inner lining layer of the pipe, as shown in FIG. 8, the pipe and the lining layer constitute a part of the low frequency high voltage pulse applying circuit through the ground wire and the grounding element,
An intermittent low frequency high voltage pulse is applied between the metal brush and the ground by the high voltage section. The metal brush scans for defects while sliding along the lining layer of the pipe wall, and when it reaches the pinhole existing in the lining layer, discharge or direct contact occurs between the metal brush and the pipe, resulting in low frequency high voltage. The pulse applying circuit becomes a closed circuit. The detection unit detects that the low-frequency high-voltage pulse application circuit has become a closed circuit and a current flows, and outputs a detection signal to the pinhole detection device main body outside the pipe by the control cable.
【０００６】低周波高圧パルス印加回路は、図８に示す
ように、配管外の高圧制御盤から高圧部に接続する制御
ケーブル、高圧部から金属ブラシに接続する高電圧出力
ケーブル及び配管の管壁に接続する接地用ケーブル等で
構成されている。そのために、配管外のピンホール検出
装置本体と配管内の走行車とには、少なくとも、高圧制
御盤から高圧部に接続する制御ケーブル、検出部とピン
ホール検出装置本体との間で信号を授受するための信号
ケーブルが接続されている。As shown in FIG. 8, the low-frequency high-voltage pulse applying circuit includes a control cable for connecting a high-voltage control panel outside the pipe to a high-voltage part, a high-voltage output cable for connecting a high-voltage part to a metal brush, and a pipe wall of the pipe. It is composed of a grounding cable to be connected to. Therefore, at least the control cable that connects the high-voltage control panel to the high-voltage unit, and the signal transmission and reception between the detection unit and the pinhole detection device main body are performed between the pinhole detection device main body outside the pipe and the traveling vehicle inside the pipe. A signal cable for connecting is connected.
【０００７】[0007]
【発明が解決しようとする課題】しかし、配管内面ライ
ニング層の従来の検査装置では、その検査可能な配管長
さは管端から高々１０ｍ程度であった。それは、検査領
域が管端から１０ｍを越えて奥にあると、検出部から出
力される検出信号が弱くてピンホール検出装置本体で認
識することが難しくなるからであった。つまり、検知器
と検出部とをつなぐケーブルを長くすると、電気抵抗及
び静電誘導の発生により検出器からの出力電圧を検出部
で低下し、検出感度が低下する。However, in the conventional inspection device for the lining layer of the inner surface of the pipe, the length of the pipe that can be inspected is about 10 m from the end of the pipe. The reason is that if the inspection region is deeper than 10 m from the pipe end, the detection signal output from the detection unit is weak and it is difficult for the pinhole detection device body to recognize it. That is, if the cable connecting the detector and the detector is lengthened, the output voltage from the detector is lowered in the detector due to the generation of electric resistance and electrostatic induction, and the detection sensitivity is lowered.
【０００８】そこで、本発明の目的は、配管長の長い配
管内面に施されたライニング層の欠陥を検出できる検査
装置を提供することである。Therefore, an object of the present invention is to provide an inspection apparatus capable of detecting a defect in a lining layer formed on the inner surface of a pipe having a long pipe length.
【０００９】[0009]
【課題を解決するための手段】本発明者等は、配管内面
ライニング層の従来の検査装置の問題点を追求した結
果、配管長が長距離になると欠陥を検出できない理由
は、第１には、走行車に搭載された高圧部及び検出部と
配管の外の装置本体とを接続するケーブルとライニング
層されたパイプとの間で静電誘導（コンデンサ効果）が
生じるために、両者の間で授受される信号が漏洩するか
らであり、第２には、ケーブルがライニング層と接触
し、摩擦抵抗のために走行車が走行し難くなることであ
ると見出し、問題を解決するためには、ケーブルを不要
にすることであると考えた。そこで、外部との接続ケー
ブルを必要としない自己完結型の検査装置を研究して、
本発明を完成するに到った。As a result of pursuing the problems of the conventional inspection device for the inner surface lining layer of the pipe, the present inventors cannot detect defects when the pipe length becomes a long distance. , Because the electrostatic induction (capacitor effect) occurs between the cable that connects the high voltage part and the detection part mounted on the traveling vehicle and the device body outside the pipe, and the pipe with the lining layer, This is because the signal transmitted and received is leaked, and secondly, it is found that the cable comes into contact with the lining layer and the traveling vehicle becomes difficult to travel due to frictional resistance. I thought it would be unnecessary to use a cable. Therefore, we researched a self-contained inspection device that does not require a connection cable to the outside,
The present invention has been completed.
【００１０】上記目的を達成するために、配管内面ライ
ニング層の本発明に係る検査装置は、金属製配管内面に
施された非導電性ライニング層を検査する検査装置であ
って、ライニング層に電気的に接触する接触子と、ライ
ニング層に摺動しつつ電気的に接触し、ライニング層を
介して配管に接地する接地子と、ライニング層に接触し
ている接触子と接地子との間に電圧を印加し、ライニン
グ層の欠陥を通して導通する電流を検出して、ライニン
グ層の欠陥を検出するライニング欠陥検出装置と、ライ
ニング欠陥検出装置で検出したライニング層の欠陥に関
するデータを記録する記録装置と、接触子、駆動装置、
ライニング欠陥検出装置及び記録装置を搭載し、かつ接
地子を下部に備えて、自動的に配管内を走行する走行車
とを備えることを特徴としている。In order to achieve the above-mentioned object, an inspection device according to the present invention for a pipe inner surface lining layer is an inspection device for inspecting a non-conductive lining layer provided on an inner surface of a metal pipe, and the lining layer is electrically charged. Between the contactor that is in contact with the lining layer, the grounding element that is in electrical contact with the lining layer while sliding, and that is grounded to the pipe through the lining layer, and the contactor that is in contact with the lining layer and the grounding element. A lining defect detecting device for detecting a current applied to the lining layer by applying a voltage to detect a defect in the lining layer, and a recording device for recording data on the defect in the lining layer detected by the lining defect detecting device. , Contactor, drive device,
It is characterized in that it is equipped with a lining defect detection device and a recording device, and is equipped with a grounding element in the lower part, and a traveling vehicle that automatically travels in the pipe.
【００１１】本発明の配管内面ライニング層の検査装置
は、ライニング層のピンホール、欠け、割れ等の欠陥、
ライニング施工の不良によるライニング層の剥離等を走
行車に搭載したライニング欠陥検出装置により検出し、
そのデータを記録装置に記録する装置である。配管の外
で待機するオペレータは、記録装置に記録されたデータ
からライニング層の欠陥の位置、検出した際の電流値等
を認識することができる。走行車は、自動的に走行でき
る限り制約はないが、排気ガスがないのが望ましいの
で、走行車に搭載した電池を電源にして走行する電気自
動車が好ましい。The pipe inner surface lining layer inspection apparatus according to the present invention is provided with pinholes, chippings, cracks and other defects in the lining layer.
The lining defect detection device mounted on the traveling vehicle detects peeling of the lining layer due to defective lining construction,
This is a device for recording the data in a recording device. An operator standing by outside the pipe can recognize the position of the defect in the lining layer, the current value at the time of detection, etc. from the data recorded in the recording device. The traveling vehicle is not limited as long as it can travel automatically, but it is desirable that there is no exhaust gas. Therefore, an electric vehicle that travels using a battery installed in the traveling vehicle as a power source is preferable.
【００１２】本発明の配管内面ライニングの検査装置で
使用するライニング欠陥検出装置は、ライニング層に接
触している接触子と接地子との間に電圧を印加し、ライ
ニング層の欠陥を通して導通する電流を検出して、ライ
ニング層の欠陥を検出する既知の装置であって、例えば
前述した既知の高電圧パルス印加式ピンホール検出装置
（ピンホールディテクタ）を使用できる。高電圧パルス
印加式の場合、印加する高電圧パルスの出力は、ライニ
ング層の厚さ、ライニング層の材料により異なるが、通
常、例えばライニング層厚さが３mm以下の場合には、出
力１０ｋＶ、３mmを越える場合には、厚さに応じて出力
を増加する。The lining defect detecting device used in the pipe inner surface lining inspection device of the present invention applies a voltage between the contactor and the grounding member which are in contact with the lining layer, and conducts current through a defect in the lining layer. Which is a known device for detecting defects in the lining layer by, for example, the above-mentioned known high voltage pulse application type pinhole detector (pinhole detector) can be used. In the case of the high voltage pulse application type, the output of the applied high voltage pulse varies depending on the thickness of the lining layer and the material of the lining layer, but normally, for example, when the lining layer thickness is 3 mm or less, the output is 10 kV and 3 mm. If it exceeds, the output is increased according to the thickness.
【００１３】本発明で使用する接触子としては、銅線か
らなる金属ブラシ、銅線のメッシュ等を使用する。接触
子は、走行車に固定され、走行車の進行方向に沿って配
管の長手方向に内周面を摺動しつつライニング層に電気
的に接触してもよく、また、接触子を回転させて配管の
周方向に摺動させる駆動装置を設け、配管の周方向に内
周面を摺動しつつライニング層に電気的に接触するよう
にしても良い。固定式の接触子として、例えば接触子と
接地子との面積比率が１：１０の円筒式ブラシを使用で
きる。回転する接触子は、例えば８インチ以上の大径の
配管のライニング層を検査する場合に好ましい。また、
接地子は、ライニング層に接触し、ライニング層を介し
て配管に接地することができる限り、その構成に制約は
なく、例えば金属ブラシまたは銅板をライニング層面に
接触させても良い。接地子を強く圧着する必要はなく、
充分な接触面積で確実に接触しておれば、印加する高電
圧パルスにより静電誘導が生じ、配管との間に電気的回
路を構成して容易に接地することができる。必要な接触
面積は、ライニング層の厚さ、印加する高電圧パルスの
電圧等により異なるので、予め実験により定める必要が
ある。通常、接地子の接触面積と接触子の接触面積との
比率を１０：１以上にするのが望ましい。As the contact used in the present invention, a metal brush made of copper wire, a mesh of copper wire, or the like is used. The contactor may be fixed to the traveling vehicle and may electrically contact the lining layer while sliding on the inner peripheral surface in the longitudinal direction of the pipe along the traveling direction of the traveling vehicle. It is also possible to provide a driving device that slides in the circumferential direction of the pipe so as to make electrical contact with the lining layer while sliding the inner circumferential surface in the circumferential direction of the pipe. As the stationary contactor, for example, a cylindrical brush having an area ratio of the contactor to the grounding element of 1:10 can be used. A rotating contactor is preferable when inspecting a lining layer of a pipe having a diameter of 8 inches or more, for example. Also,
The structure of the grounding element is not limited as long as it can be in contact with the lining layer and can be grounded to the pipe through the lining layer. For example, a metal brush or a copper plate may be in contact with the lining layer surface. There is no need to strongly crimp the grounding element,
If they are surely in contact with each other with a sufficient contact area, electrostatic induction occurs due to the applied high-voltage pulse, and an electric circuit can be formed between them and the piping to easily ground them. The required contact area depends on the thickness of the lining layer, the voltage of the applied high-voltage pulse, and the like, and must be determined in advance by experiments. Usually, it is desirable to set the ratio of the contact area of the grounding element to the contact area of the contacting element to 10: 1 or more.
【００１４】本発明の好適な実施態様は、ライニング欠
陥検出装置が、接触子と接地子との間に高電圧パルスを
印加して、ライニング層の欠陥を検出するようにした装
置であり、接触子が金属ブラシであり、接地子が走行車
の車体から配管内面に向かって伸びてライニング層に接
触する金属ブラシと、車体と金属ブラシとの間に介在
し、金属ブラシをライニング層に押圧する弾性体とから
なることを特徴としている。In a preferred embodiment of the present invention, the lining defect detecting device is a device adapted to detect a defect in the lining layer by applying a high voltage pulse between the contactor and the grounding element. The child is a metal brush, the grounding element extends from the vehicle body of the traveling vehicle toward the inner surface of the pipe and contacts the lining layer, and is interposed between the vehicle body and the metal brush to press the metal brush against the lining layer. It is characterized by being composed of an elastic body.
【００１５】また、本発明の更に好適な実施態様は、走
行車の車輪が、走行車の車体の進行方向中心線を中心に
して対称にかつ配管の内面に直交する方向に取り付けら
れていることを特徴としている。これにより、走行車は
配管の曲がりを円滑に走行することができる。In a further preferred aspect of the present invention, the wheels of the traveling vehicle are mounted symmetrically with respect to the center line of the traveling vehicle body in the direction of travel and orthogonal to the inner surface of the pipe. Is characterized by. As a result, the traveling vehicle can smoothly travel along the bend in the pipe.
【００１６】[0016]
【発明の実施の形態】以下に、添付図面を参照し、実施
例を挙げて本発明の実施の形態を具体的かつ詳細に説明
する。実施例 本実施例は、配管内面ライニング層の本発明に係る検査
装置の実施例であって、図１は実施例の構成を示す斜視
図、図２は図１の矢視Ｉ−Ｉから見た接触子と接地子の
構成を示す装置正面図、図３は接触子の金属ブラシの寸
法を示す斜視図及び図４は図２の矢視II−IIの接地子の
側面図である。本実施例の配管内面ライニング層の検査
装置１０（以下、簡単に検査装置１０と言う）は、金属
製配管Ａの内面に施された非導電性ライニング層を検査
する検査装置であって、図１に示すように、高電圧パル
ス印加式ピンホール検出装置１２（以下、簡単にピンホ
ール検出装置１２と言う）と、接触子１４と、接触子を
回転、駆動する駆動装置１６と、接地子１８（図２参
照）と、記録装置２０及びそれらの装置を搭載している
電気走行車２２とを備えている。Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Example This example is an example of the inspection device according to the present invention for the pipe inner surface lining layer, FIG. 1 is a perspective view showing the configuration of the example, FIG. 2 is seen from the arrow I-I of FIG. FIG. 3 is a front view of the apparatus showing the configuration of the contactor and the grounding element, FIG. 3 is a perspective view showing the dimensions of the metal brush of the contactor, and FIG. 4 is a side view of the grounding element taken along the line II-II in FIG. A pipe inner surface lining layer inspection device 10 (hereinafter, simply referred to as inspection device 10) of the present embodiment is an inspection device for inspecting a non-conductive lining layer provided on an inner surface of a metal pipe A, and As shown in FIG. 1, a high voltage pulse application type pinhole detection device 12 (hereinafter simply referred to as pinhole detection device 12), a contactor 14, a drive device 16 for rotating and driving the contactor, and a grounding element. 18 (see FIG. 2), a recording device 20 and an electric vehicle 22 equipped with these devices.
【００１７】ピンホール検出装置１２は、接地子１８の
構成を除いて図７及び図８に示す既知のピンホール検出
装置と同じ構成を備えていて、ピンホールの検出に必要
な高圧部、検出部、制御部等が全て走行車２２に搭載さ
れている。The pinhole detecting device 12 has the same structure as the known pinhole detecting device shown in FIGS. 7 and 8 except for the structure of the grounding element 18, and the high voltage portion necessary for detecting the pinhole and the detecting The control unit and the control unit are all mounted on the traveling vehicle 22.
【００１８】接触子１４は、図１及び図２に示すよう
に、配管Ａの中心軸線に沿って伸び、中心軸線の周りに
回転する回転軸２４と、回転軸２４から半径方向に配管
Ａのライニング層近くまで伸びる３本のアーム２６と、
アーム２６の先端に取り付けられ、配管の軸線方向に伸
びる金属ブラシ２８とから構成されている。金属ブラシ
２８は、回転軸２４が回転することによって、図２に示
すように配管Ａのライニング層に接触しつつ配管Ａの全
周にわたり摺動する。例えば３０インチの配管内面ライ
ニングの検査に使用する場合には、金属ブラシ２８の寸
法は、図３に示すように、配管Ａの軸線方向の長さＬが
約２５０mm、金属線の長さが、Ｈ1 が５０mm、Ｈ2 が２
５mm、幅Ｗが３６mmから３９mmで良く、先端の幅はＷの
１／３で１２mmから１３mmである。接触子１４は、金属
ブラシ２８により、配管内面の凹凸に充分追随して走行
中常時ライニング層に接触することができる。各金属ブ
ラシ２８には、高電圧パルス印加ケーブルがそれぞれ接
続されていて、それぞれ独立してライニング層の欠陥を
検出するようになっている。接触子１４の駆動装置とし
て、電気モータ１６が走行車２２に搭載されており、同
じく走行車２２に搭載されている電池２９を電源にして
既知の歯車伝達機構を介して回転軸２４を回転させる。As shown in FIGS. 1 and 2, the contactor 14 extends along the central axis of the pipe A and rotates about the central axis, and the rotary shaft 24 extends radially from the rotary shaft 24. Three arms 26 extending to near the lining layer,
The metal brush 28 is attached to the tip of the arm 26 and extends in the axial direction of the pipe. The metal brush 28 slides over the entire circumference of the pipe A while coming into contact with the lining layer of the pipe A as shown in FIG. For example, when used for inspecting a 30-inch pipe inner surface lining, the dimensions of the metal brush 28 are, as shown in FIG. 3, the length L of the pipe A in the axial direction of the pipe A is about 250 mm, and the length of the metal wire is H 1 is 50 mm, H 2 is 2
The width may be 5 mm and the width W may be 36 mm to 39 mm, and the width of the tip is 1/3 of W and is 12 mm to 13 mm. The contactor 14 can sufficiently follow the irregularities on the inner surface of the pipe by the metal brush 28 and can always contact the lining layer during traveling. A high voltage pulse applying cable is connected to each of the metal brushes 28 so as to detect defects in the lining layer independently of each other. An electric motor 16 is mounted on the traveling vehicle 22 as a driving device for the contactor 14, and the battery 29 also mounted on the traveling vehicle 22 is used as a power source to rotate the rotary shaft 24 via a known gear transmission mechanism. .
【００１９】接地子１８は、図２に示すように、走行車
２２の車体の下にコイルバネ３０を介して取り付けられ
ていて、配管Ａと同心円筒の円筒壁の一部からなる曲面
パネル３２と、曲面パネル３２に取り付けられた多数個
の金属ブラシ３４とから構成されている。本実施例で
は、金属ブラシ２８の接触面積に対して金属ブラシ３４
の接触面積を１：７〜１：１８になっている。曲面パネ
ル３２は、図２及び図４に示すように、配管内面に向か
って付勢されたコイルバネ３０の下端に連結され、かつ
配管Ａの軸線方向に分割されて走行車２２の車体の下面
の全面にわたり延在する。金属ブラシ３４は、多数の短
い鉄線を束ねて細長い帯状に形成された鉄線束であっ
て、その長手方向を配管Ａの軸線方向に沿わせ、鉄線が
配管Ａのライニング層に直交する方向を向いて曲面パネ
ル３２に取り付けてある。以上の構成により、接地子１
８は、金属ブラシ３４がコイルバネ３０の押圧力により
充分な接触面積で以てライニング層に緊密に接触し、か
つ配管面に凹凸があってもそれに追随し、走行中常時ラ
イニング層を介して配管Ａに接地することができる。As shown in FIG. 2, the grounding element 18 is mounted below the vehicle body of the traveling vehicle 22 via a coil spring 30, and has a curved panel 32 which is a part of a cylindrical wall of the pipe A and a concentric cylinder. , A large number of metal brushes 34 attached to the curved panel 32. In this embodiment, the contact area of the metal brush 28 with respect to the contact area of the metal brush 34
Has a contact area of 1: 7 to 1:18. As shown in FIGS. 2 and 4, the curved panel 32 is connected to the lower end of the coil spring 30 biased toward the inner surface of the pipe, and is divided in the axial direction of the pipe A so that the curved panel 32 is attached to the lower surface of the vehicle body of the traveling vehicle 22. It extends all over. The metal brush 34 is an iron wire bundle formed by bundling a large number of short iron wires in the shape of an elongated strip. The longitudinal direction of the metal brush 34 is along the axial direction of the pipe A, and the iron wires are oriented in a direction orthogonal to the lining layer of the pipe A. Attached to the curved panel 32. With the above configuration, the grounding element 1
Reference numeral 8 indicates that the metal brush 34 comes into close contact with the lining layer with a sufficient contact area by the pressing force of the coil spring 30 and follows the unevenness of the pipe surface even if the pipe surface has irregularities, and the pipe is always provided through the lining layer during traveling. Can be grounded at A.
【００２０】本実施例では、記録装置２０は、ピンホー
ル検出装置１２で検出した欠陥の位置とその時の高電圧
パルスの電流値とを記録できる既知の構成の記録装置で
あって、検査装置１０を配管Ａの外に取り出した後、そ
の記録を読み出すようになっている。欠陥の位置は、例
えば、欠陥を検出した際の接触子の累積回転角度又は走
行車２２の走行距離と接触子の回転角度を計測すること
により特定できる。In the present embodiment, the recording device 20 is a recording device having a known structure capable of recording the position of the defect detected by the pinhole detection device 12 and the current value of the high voltage pulse at that time. After taking out from the pipe A, the record is read out. The position of the defect can be specified, for example, by measuring the cumulative rotation angle of the contactor when the defect is detected or the traveling distance of the traveling vehicle 22 and the rotation angle of the contactor.
【００２１】走行車２２は、搭載した電池２９を電源と
して走行する電気走行車であって、図１に示すように、
車体の後部左右の２か所に取り付けられた駆動輪３６
Ａ、Ｂと車体の前部左右の２か所に取り付けられた被駆
動輪３８Ａ、Ｂとを有する。駆動輪３６及び被駆動輪３
８は、図２に示すように、それぞれ車体の進行方向中心
線を中心にして対称にかつ配管の内面に直交する方向に
取り付けられている。The traveling vehicle 22 is an electric traveling vehicle that travels by using the battery 29 mounted therein as a power source, and as shown in FIG.
Drive wheels 36 attached to the rear left and right of the vehicle body
A and B and driven wheels 38A and B attached to two positions on the left and right of the front part of the vehicle body. Driving wheel 36 and driven wheel 3
As shown in FIG. 2, 8 are attached symmetrically with respect to the center line of the traveling direction of the vehicle body and in a direction orthogonal to the inner surface of the pipe.
【００２２】以上のような車輪の配置により、走行車２
２は、配管Ａの内面を自在に走行することができ、配管
Ａに曲がりがあっても、その曲がりに沿って進行するこ
とができる。尚、走行車２２が曲がりに沿って進行する
際には、走行車２２は配管Ａの曲がり外側の内面を登っ
た走路を取るので、その際、走行車２２が、転倒しない
ように、駆動輪３６及び被駆動輪３８に加えて、例えば
図５に示すように、上部枠体４０を車体上部に設け、車
体上部４０に突っ張り車輪４２を設けても良い。また、
走行車２２は、接触子１４が一回転するのに要する時間
で金属ブラシ２８の検査長さ（ほぼ、金属ブラシ２８の
配管Ａの軸線方向長さ）の距離を前進するような速度で
配管Ａ内を走行する。例えば、本実施例では、金属ブラ
シ２８の摺動速度が３８０mm／sec になるように走行車
２２の速度を調整している。With the above wheel arrangement, the traveling vehicle 2
2 can travel freely on the inner surface of the pipe A, and even if the pipe A has a bend, it can proceed along the bend. When the traveling vehicle 22 travels along a bend, the traveling vehicle 22 takes a running path that has climbed the inner surface on the outside of the bend of the pipe A. At that time, the traveling vehicle 22 does not fall over so that the drive wheels do not fall. In addition to the 36 and the driven wheels 38, as shown in FIG. 5, for example, an upper frame 40 may be provided on the upper portion of the vehicle body, and a strut wheel 42 may be provided on the upper portion 40 of the vehicle body. Also,
The traveling vehicle 22 moves the pipe A at a speed such that the traveling vehicle 22 moves forward a distance equal to the inspection length of the metal brush 28 (approximately the axial length of the pipe A of the metal brush 28) in the time required for the contactor 14 to make one rotation. Drive inside. For example, in this embodiment, the speed of the traveling vehicle 22 is adjusted so that the sliding speed of the metal brush 28 becomes 380 mm / sec.
【００２３】以上の構成により、本実施例の検査装置１
０は、配管Ａのライニング層をその全周にわたり接触子
１４で接触、摺動しつつ配管Ａ内を前進する。仮に、ピ
ンホール等の欠陥がライニング層にあると、接触子１４
と配管Ａとの間に放電又は直接接触が生じ、高電圧パル
ス印加回路が閉回路になって電流が流れる。その電流を
ピンホール検出装置１２で検出し、記録装置２０にその
欠陥の位置と電流値とを記録する。記録装置２０に記録
されたデータにより、配管の外に待機しているオペレー
タは、欠陥の位置と、欠陥の大きさ、種類等を認識する
ことができる。With the above configuration, the inspection apparatus 1 of this embodiment
0 moves forward in the pipe A while contacting and sliding the lining layer of the pipe A with the contactor 14 over the entire circumference thereof. If there is a defect such as a pinhole in the lining layer, the contact 14
A discharge or direct contact occurs between the pipe and the pipe A, the high-voltage pulse applying circuit is closed, and a current flows. The current is detected by the pinhole detection device 12, and the position of the defect and the current value are recorded in the recording device 20. Based on the data recorded in the recording device 20, an operator waiting outside the pipe can recognize the position of the defect, the size and type of the defect, and the like.
【００２４】上述の検査装置１０を使用して、種々の実
験を行った結果、接触子の速度を９０mm／sec に設定す
ると、径が１．０mm以上のピンホールを検出するために
は、接地子の接触面積と接触子の接触面積との比率を１
０：１以上にし、高電圧パルスの印加電圧を１０．０ｋ
Ｖ以上にすることが望ましく、また径が１．０mm以下の
ピンホールを検出するためには、接地子の接触面積と接
触子の接触面積との比率を１０：１以上にし、高電圧パ
ルスの印加電圧を１２．５ｋＶ以上にすることが望まし
いことが判った。As a result of various experiments using the above-mentioned inspection device 10, when the speed of the contactor is set to 90 mm / sec, in order to detect a pinhole having a diameter of 1.0 mm or more, the grounding is performed. The ratio between the contact area of the child and the contact area of the contact is 1
The applied voltage of the high voltage pulse is 10.0 k
In order to detect pinholes with a diameter of 1.0 mm or less, the ratio of the contact area of the grounding element to the contacting area of the contacting element is set to 10: 1 or more, and high voltage pulse It has been found that it is desirable to set the applied voltage to 12.5 kV or higher.
【００２５】金属ブラシの長さをＬmm、走行車の軸方向
速度をＶmm／sec 、接触子の回転速度をωrpm とし、金
属ブラシの個数を３個にした場合、欠陥の検出限界を考
慮すると、凡そ、ω＝２０×Ｖ／Ｌの関係が成立するこ
とが判った。そこで、接地子の大きさ、金属ブラシ数及
びこの関係を勘案して、金属ブラシの寸法、回転速度を
定める。例えば、内径ｄｉ７３０mmの配管に施されたラ
イニング層を検査する場合、Ｌ＝９０mmとし、ω＝π×
（ｄｉ／６０）×ωmm／sec ≦９０mm／sec とすると、
ω≦２．４rpm 、Ｖ＝Ｌ×ω／２０≧１０．８mm／sec
＝３９ｍ／hrとなる。ωが２．４rpm より速いと、欠陥
を見落とし、Ｖがこれより遅いと、一個の欠陥をダブッ
て検出することになる。When the length of the metal brush is L mm, the axial speed of the traveling vehicle is V mm / sec, the rotational speed of the contact is ω rpm, and the number of metal brushes is 3, considering the defect detection limit, It was found that the relationship of ω = 20 × V / L is established. Therefore, the size and rotation speed of the metal brush are determined in consideration of the size of the grounding element, the number of metal brushes, and this relationship. For example, when inspecting a lining layer applied to a pipe having an inner diameter di730 mm, L = 90 mm and ω = π ×
If (di / 60) × ωmm / sec ≦ 90 mm / sec,
ω ≦ 2.4 rpm, V = L × ω / 20 ≧ 10.8 mm / sec
= 39 m / hr. When ω is faster than 2.4 rpm, the defect is overlooked, and when V is slower than this, one defect is dub and detected.
【００２６】改変例 本例の検査装置５０は、実施例の検査装置１０の改変例
であって、図６に示すように、検査装置１０の構成に加
えて、走行車２２に連結、牽引された被牽引台車５２
と、接触子１４の回転を支持する接触子支持輪５４とを
備えている。被牽引台車５２は、例えば配管長の長い配
管内面ライニングを検査するために、走行車２２に搭載
できない程の電池を積載する必要がある場合に、積めな
かった電池を積載するための台車である。多数個の電池
を積載する場合、走行車２２を長い車体にして全て走行
車２２に搭載しようとすると、曲がり部を進行し難くな
るので、寧ろ本改変例のように、被牽引台車５２を設け
て、それに電池を積載した方が望ましい。また、接触子
支持輪５４は、接触子１４の先端を支持して、接触子１
４が回転に際して振れないようにするためのもので、接
触子１４の回転軸２４の延長軸５６に固定された３本の
アーム５８からなり、アーム５８の先端にはキャスタ６
０が取り付けてある。尚、アーム５８の長さは、ネジ等
により調整可能になっている。 Modification Example The inspection device 50 of this example is a modification of the inspection device 10 of the embodiment, and as shown in FIG. 6, in addition to the configuration of the inspection device 10, it is connected to and pulled by the traveling vehicle 22. Towed truck 52
And a contactor support wheel 54 that supports rotation of the contactor 14. The towed cart 52 is a cart for loading a battery that cannot be mounted on the traveling vehicle 22 when it is necessary to load a battery that cannot be mounted on the traveling vehicle 22 in order to inspect a pipe inner surface lining having a long pipe length, for example. . When a large number of batteries are loaded, if the traveling vehicle 22 is made into a long vehicle body and all of the traveling vehicles 22 are to be mounted on the traveling vehicle 22, it becomes difficult for the vehicle to go through the bends. Therefore, the towed vehicle 52 is provided as in this modified example. It is preferable to load batteries on it. Further, the contactor support wheel 54 supports the tip of the contactor 14 to support the contactor 1
4 is for preventing shaking during rotation, and is composed of three arms 58 fixed to an extension shaft 56 of the rotary shaft 24 of the contactor 14, and the caster 6 is provided at the tip of the arm 58.
0 is attached. The length of the arm 58 can be adjusted with screws or the like.
【００２７】[0027]
【発明の効果】本発明によれば、自動的に走行する走行
車にライニング層の欠陥検出に必要な設備を全て搭載し
て、ケーブルによる電力供給、信号の授受等の外からの
サポートを必要とすることなく、自動的にライニング層
の欠陥を検出し、記録することができる、配管内面ライ
ニング層の検査装置を実現している。本発明に係る配管
内面ライニング層の検査装置を使用すれば、人が中に入
る必要がなく、しかも従来の装置に比べて遙に配管長の
長い配管の内面に施工されたライニング層を自動的に検
査することができる。According to the present invention, all the equipment required for detecting defects in the lining layer is mounted on a traveling vehicle that automatically travels, and it is necessary to provide external support such as power supply by cables and exchange of signals. The inspection device for the lining layer of the inner surface of the pipe has been realized, which can automatically detect and record the defect of the lining layer without being By using the pipe inner surface lining layer inspection device according to the present invention, it is not necessary for a person to enter inside, and the lining layer applied to the inner surface of the pipe having a much longer pipe length than the conventional device is automatically provided. Can be inspected.
【図１】配管内面ライニング層の検査装置の実施例の構
成を示す斜視図である。FIG. 1 is a perspective view showing a configuration of an embodiment of a pipe inner surface lining layer inspection device.
【図２】図１の矢視Ｉ−Ｉから見た接触子と接地子の構
成を示す装置正面図である。FIG. 2 is a device front view showing the configuration of a contactor and a grounding member as viewed from the direction of arrows I-I in FIG.
【図３】接触子の金属ブラシの寸法を示す斜視図であ
る。FIG. 3 is a perspective view showing dimensions of a metal brush of a contactor.
【図４】図２の矢視II−IIの接地子の側面図である。FIG. 4 is a side view of the grounding element taken along the line II-II in FIG.
【図５】突っ張り車輪の構成を示す模式図である。FIG. 5 is a schematic diagram showing a configuration of a strut wheel.
【図６】実施例の改変例の構成を示す斜視図である。FIG. 6 is a perspective view showing a configuration of a modified example of the embodiment.
【図７】従来のピンホール検出装置の原理を示す図であ
る。FIG. 7 is a diagram showing the principle of a conventional pinhole detection device.
【図８】従来のピンホール検出装置の高電圧パルスの印
加回路の構成を示す模式図である。FIG. 8 is a schematic diagram showing a configuration of a high voltage pulse application circuit of a conventional pinhole detection device.
１０ 配管内面ライニング層の検査装置の実施例 １２ 高電圧パルス印加式ピンホール検出装置 １４ 接触子 １６ 駆動装置 １８ 接地子 ２０ 記録装置 ２２ 電気走行車 ２４ 回転軸 ２６ アーム ２８ 金属ブラシ ２９ 電池 ３０ コイルバネ ３２ 曲面パネル ３４ 金属ブラシ ３６ 駆動輪 ３８ 被駆動輪 ４０ 上部枠体 ４２ 突っ張り車輪 ５０ 配管内面ライニング層の検査装置の実施例の改変
例 ５２ 被牽引台車 ５４ 接触子支持輪 ５６ 回転軸の延長軸 ５８ アーム ６０ キャスタ６０10 Example of Inspection Device for Inner Lined Layer of Pipe 12 High Voltage Pulse Applied Pinhole Detection Device 14 Contact 16 Drive Device 18 Grounding Device 20 Recording Device 22 Electric Vehicle 24 Rotation Shaft 26 Arm 28 Metal Brush 29 Battery 30 Coil Spring 32 Curved panel 34 Metal brush 36 Drive wheel 38 Driven wheel 40 Upper frame body 42 Stretched wheel 50 Modified example of the embodiment of the inspection device of the pipe inner lining layer 52 Towed trolley 54 Contact support wheel 56 Rotation shaft extension shaft 58 Arm 60 casters 60
───────────────────────────────────────────────────── フロントページの続き (72)発明者 倉知 和人 神奈川県茅ヶ崎市東海岸南４−11−９ (72)発明者 色谷 武 千葉県市原市辰巳台東３−16Ｂ−616 (72)発明者 永菅 久嗣 大阪市住之江区西住之江１丁目３番１− 204 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuto Kurachi 4-11-9 South East coast of Chigasaki City, Kanagawa Prefecture (72) Inventor Takeshi Iriya 3-16B-616 Tatsumidai East, Ichihara City, Chiba Prefecture (72) Inventor Hisashi Nagasuge 1-3-3, Nishizuminoe, Suminoe-ku, Osaka-shi, Osaka
Claims (4)
ニング層を検査する検査装置であって、 ライニング層に電気的に接触する接触子と、 ライニング層に摺動しつつ電気的に接触し、ライニング
層を介して配管に接地する接地子と、 ライニング層に接触している接触子と接地子との間に電
圧を印加し、ライニング層の欠陥を通して導通する電流
を検出して、ライニング層の欠陥を検出するライニング
欠陥検出装置と、 ライニング欠陥検出装置で検出したライニング層の欠陥
に関するデータを記録する記録装置と、 接触子、駆動装置、ライニング欠陥検出装置及び記録装
置を搭載し、かつ接地子を下部に備えて、自動的に配管
内を走行する走行車とを備えることを特徴とする配管内
面ライニング層の検査装置。1. An inspection device for inspecting a non-conductive lining layer provided on an inner surface of a metal pipe, comprising a contactor electrically contacting the lining layer and an electrical contact while sliding on the lining layer. Then, a voltage is applied between the grounding element that is grounded to the pipe through the lining layer and the contactor and the grounding element that are in contact with the lining layer, and the current that conducts through the defects in the lining layer is detected to detect the lining. It is equipped with a lining defect detection device for detecting layer defects, a recording device for recording data on defects of the lining layer detected by the lining defect detection device, a contact, a driving device, a lining defect detection device and a recording device, and An apparatus for inspecting an inner lining layer of a pipe, comprising: a grounding piece provided at a lower portion; and a traveling vehicle automatically traveling in the pipe.
に接触子を回転させる回転装置を備えていることを特徴
とする請求項１に記載の配管内面ライニング層の検査装
置。2. The pipe inner surface lining layer inspection device according to claim 1, further comprising a rotating device that rotates the contactor so as to slide the inner peripheral surface in the peripheral direction of the pipe.
地子との間に高電圧パルスを印加して、ライニング層の
欠陥を検出するようにした装置であり、接触子が金属ブ
ラシであり、接地子が走行車の車体から配管内面に向か
って伸びてライニング層に接触する金属ブラシと、車体
と金属ブラシとの間に介在し、金属ブラシをライニング
層に押圧する弾性体とからなることを特徴とする請求項
１又は２に記載の配管内面ライニング層の検査装置。3. A lining defect detecting device is a device adapted to detect a defect in a lining layer by applying a high voltage pulse between a contact and a grounding member, and the contact is a metal brush, The grounding element comprises a metal brush that extends from the vehicle body of the traveling vehicle toward the inner surface of the pipe and contacts the lining layer, and an elastic body that is interposed between the vehicle body and the metal brush and presses the metal brush against the lining layer. The pipe inner surface lining layer inspection device according to claim 1 or 2.
向中心線を中心にして対称にかつ配管の内面に直交する
方向に取り付けられていることを特徴とする請求項１か
ら３のうちのいずれか１項に記載の配管内面ライニング
層の検査装置。4. The wheels of the traveling vehicle are mounted symmetrically with respect to a traveling center line of the vehicle body of the traveling vehicle and in a direction orthogonal to the inner surface of the pipe. The pipe inner surface lining layer inspection device according to any one of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09615996A JP3585634B2 (en) | 1996-03-26 | 1996-03-26 | Inspection device for pipe lining layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09615996A JP3585634B2 (en) | 1996-03-26 | 1996-03-26 | Inspection device for pipe lining layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09257715A true JPH09257715A (en) | 1997-10-03 |
| JP3585634B2 JP3585634B2 (en) | 2004-11-04 |
Family
ID=14157583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09615996A Expired - Lifetime JP3585634B2 (en) | 1996-03-26 | 1996-03-26 | Inspection device for pipe lining layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3585634B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006119096A (en) * | 2004-10-25 | 2006-05-11 | Central Res Inst Of Electric Power Ind | Electrode cable for measuring specific resistance |
| WO2018023140A1 (en) * | 2016-07-27 | 2018-02-01 | Viviers Dennis Frederick | Pipeline-inspecting device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101306445B1 (en) | 2011-10-20 | 2013-09-09 | 한국토지주택공사 | Non Excavation Expansion Repair Method of Flexible Pipe for Water and Sewage |
-
1996
- 1996-03-26 JP JP09615996A patent/JP3585634B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006119096A (en) * | 2004-10-25 | 2006-05-11 | Central Res Inst Of Electric Power Ind | Electrode cable for measuring specific resistance |
| WO2018023140A1 (en) * | 2016-07-27 | 2018-02-01 | Viviers Dennis Frederick | Pipeline-inspecting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3585634B2 (en) | 2004-11-04 |
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