JPH0338149B2 - - Google Patents
Info
- Publication number
- JPH0338149B2 JPH0338149B2 JP11679583A JP11679583A JPH0338149B2 JP H0338149 B2 JPH0338149 B2 JP H0338149B2 JP 11679583 A JP11679583 A JP 11679583A JP 11679583 A JP11679583 A JP 11679583A JP H0338149 B2 JPH0338149 B2 JP H0338149B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- drive
- wall surface
- rollers
- moving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000001174 ascending effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/005—Investigating fluid-tightness of structures using pigs or moles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/049—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/049—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled
- B08B9/0495—Nozzles propelled by fluid jets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
- F16L55/28—Constructional aspects
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Pipeline Systems (AREA)
Description
【発明の詳細な説明】
本発明は、それ自身パイプ壁で支え、部分的に
駆動される多数のローラを有するパイプ内壁面を
移動する装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for moving the inner wall of a pipe which is itself supported by the pipe wall and has a number of partially driven rollers.
パイプ導管の内部を移動する装置は種々の目的
に対して周知である。例として熔接パイプの内部
で熔接継目を取除くための装置があげられよう。
この種の装置というものは例えば１つの本体から
成つており、それにガイドローラ乃至は駆動ロー
ラが配設されており、これらローラはパイプ壁に
対して押圧され、且つある種の方法で駆動される
ことによりパイプ内を自動的に移動するように構
成されたものである。（例えば米国特許第2778281
号参照）
これらのパイプ内壁面を移動する周知の装置の
欠点は、これらが上昇する管路に使用するのには
適していない、即ちこれらの装置の走行させるべ
きパイプ導管がほんの僅かな上昇角度をもつてい
ても、作動しなくなる。またこれに加えて、これ
らの装置は曲つたパイプ導管内を走行させる時に
も非常な困難が生ずる。 Devices for moving inside pipe conduits are well known for a variety of purposes. An example would be a device for removing weld joints inside welded pipes.
A device of this kind consists, for example, of a body on which guide rollers or drive rollers are arranged, which rollers are pressed against the pipe wall and are driven in a certain way. The device is configured to automatically move within the pipe. (e.g. U.S. Patent No. 2778281
The disadvantage of these known devices for moving inside pipe walls is that they are not suitable for use in ascending conduits, i.e. if the pipe conduits to be run in these devices have only a slight ascending angle. Even if you have it, it will not work. In addition, these devices also present great difficulties when traveling through curved pipe conduits.
本発明の課題は、上昇する管路においても、該
管路内における移動ができ、曲がりが管径Ｄの
1.5倍以下の曲率半径を持つパイプ内においても
使用可能であるようなパイプ内壁面を移動する装
置を提供することにある。 The problem of the present invention is that even in an ascending pipe, the movement within the pipe is possible, and the bend is the same as the pipe diameter D.
It is an object of the present invention to provide a device for moving the inner wall surface of a pipe, which can be used even in a pipe having a radius of curvature of 1.5 times or less.
この課題は、本発明によれば、前記特許請求の
範囲第１項の特徴部分に述べた手段により解決さ
れる。 According to the invention, this object is solved by the measures mentioned in the characterizing part of claim 1.
種々の形状はそれ以下の実施態様項に明記され
ている。 Various shapes are specified in the embodiment section below.
両方のユニツトを、カルダン継手式に連結する
ことによつて、本発明に従う装置は、曲がつた管
路、例えば曲率半径が管径Ｄの1.5倍以下の管路
をも通過しうるものであり、従つて従来普通の装
置では達成され得ないような使用可能性が生ずる
ものである。特に重要なことはその駆動ローラ乃
至ガイドローラの配置とローラ自体の形状にあ
る。特許請求の範囲第１項の特徴部分によれば、
タンデム配置にある駆動輪は駆動ブロツク内に設
けられており、特許請求の範囲第２項によればダ
ブル式タンデム配置も採用することができる。 By connecting both units in a Cardan joint type, the device according to the invention can also pass through curved pipes, for example pipes with a radius of curvature of less than 1.5 times the pipe diameter D. , thus creating possibilities of use that could not be achieved with conventional devices. What is particularly important is the arrangement of the drive roller or guide roller and the shape of the roller itself. According to the characteristic part of claim 1,
The drive wheels in tandem arrangement are arranged in the drive block; according to claim 2, a double tandem arrangement can also be adopted.
駆動ブロツクがその装置支持体の周りに互に
120°ずれて配設されている時に、駆動ユニツトに
対して傾倒安定性のあるガイドを提供でき、同時
にまた駆動ローラがその押圧力のためにはめ管内
に押圧されることなく、はめ管熔接部を障害され
ずに乗り越えて行くことが可能となる。このこと
はまたそれ相応に形成されたガイドローラに対し
ても当て嵌まる。 The drive blocks are connected to each other around the device support.
When arranged at a 120° offset, it can provide a tilting stable guide for the drive unit and at the same time prevent the drive roller from being pressed into the fit tube due to its pressing force, allowing the welding part of the fit tube to It becomes possible to overcome this without any obstacles. This also applies to correspondingly designed guide rollers.
結局、特許請求の範囲に記した関係から、カル
ダン継手に関するローラの距離が生ずる、という
のは駆動ユニツトは作動平面が常にパイプ平面に
対して垂直となるようにその向きを向けられてい
るからである。本発明によれば、作動ユニツトに
パイプ内壁面を試験又は検査する装置を装着すれ
ば、該装置はパイプ内壁面から正確に一定の距離
を保つて移動し、その結果、今迄達成し得ない正
確さでパイプ内壁面を試験又は検査でき、しかも
該試験又は検査の結果は再現性のあるものとな
る。 After all, the relationship defined in the claims results in a distance of the rollers with respect to the Cardan coupling, since the drive unit is oriented in such a way that its working plane is always perpendicular to the pipe plane. be. According to the invention, when the actuating unit is equipped with a device for testing or inspecting the inner wall of the pipe, the device moves at a precisely fixed distance from the inner wall of the pipe, so that it is possible to move the device at a precisely fixed distance from the inner wall of the pipe, which has not been possible until now. The inner wall surface of the pipe can be tested or inspected with accuracy, and the results of the test or inspection are reproducible.
本発明は、次に図面に示した実施例に基づい
て、詳細に説明されよう。 The invention will now be explained in more detail on the basis of an embodiment shown in the drawing.
第１図に略図的に示した本装置は、駆動ユニツ
ト１とそれとカルダン継手式に連結された作動ユ
ニツト２とから成つている。駆動ユニツトの中央
支持体６の周りには例えば120°だけ互にずれて駆
動ブロツク７が設けられており、これらはタンデ
ム装置５をもつて駆動ローラ４を支持している。
駆動ブロツク７はタンデム装置５をパイプ１５に
対して押圧したり、引込めることができる。その
配置は、第２図においてもう一度図示されてお
り、第４図ａ及び第４図ｂに、駆動ブロツクにお
ける駆動ローラについてその実施例が示されてい
る。それらは簡単なタンデム配置（第４図ａ）に
おけるものか、又は第４図ｂに従うダブル式のタ
ンデム配置におけるものである。 The device, which is shown diagrammatically in FIG. 1, consists of a drive unit 1 and an actuating unit 2 connected thereto in a Cardan joint. Around the central support 6 of the drive unit, drive blocks 7 are arranged offset from each other by, for example, 120 DEG, which support the drive rollers 4 with a tandem arrangement 5.
The drive block 7 can push the tandem device 5 against the pipe 15 and retract it. The arrangement is illustrated once again in FIG. 2, and in FIGS. 4a and 4b an embodiment is shown for the drive roller in the drive block. They are either in a simple tandem arrangement (FIG. 4a) or in a double tandem arrangement according to FIG. 4b.
第１図及び第２図においては、ダブル式タンデ
ム配置を有する実施態様のものが示されている。
カルダン継手３を介して駆動ユニツト１と作動ユ
ニツト２とは連結されており、作動ユニツト２に
は装置支持体８の周りで例えば同じく120°だけず
れた配置でガイドローラ９を備えている。これら
のガイドローラ９は駆動ローラ４と同様にパイプ
壁に対して押圧可能である。これに使用された押
圧手段の詳細は図示されていないが、装置支持体
８上で摺動可能であり、且つガイドローラ９のレ
バー装置を介して押圧可能な設定装置１０が示さ
れており、装置１０を支持体８上に移動すること
によつてガイドローラ９を作動しうる。装置支持
体８にはそれぞれ必要な作動装置が固定されう
る。 In FIGS. 1 and 2 an embodiment with a double tandem arrangement is shown.
Drive unit 1 and actuating unit 2 are connected via a Cardan joint 3, and actuating unit 2 is provided with guide rollers 9 arranged around device support 8, also offset by, for example, 120°. These guide rollers 9, like the drive rollers 4, can be pressed against the pipe wall. The details of the pressing means used for this are not shown, but a setting device 10 is shown which is slidable on the device support 8 and can be pressed via a lever device of the guide roller 9. By moving the device 10 onto the support 8 the guide rollers 9 can be actuated. The respective necessary actuating devices can be fixed to the device support 8.
本装置のコントロールは外部から行ない、その
際パイプ内における本装置の位置決めは、例えば
放射性の検出装置１３により、外部に配設された
ゾンデ１４を用いてコントロールすることができ
る。テレビカメラ乃至は内視鏡を用いた制御も可
能であり、その際エネルギーの供給は制御導管乃
至は供給導管１１，１２によつて行われる。 The device is controlled externally, the positioning of the device in the pipe being controlled, for example, by means of a radioactive detection device 13 using an externally arranged probe 14. Control using a television camera or an endoscope is also possible, with the energy supply taking place via control lines or supply lines 11, 12.
第３図から分るように、本発明に従う装置によ
ると、比較的曲りの小さなパイプ内でも貫通走行
しうるものであり、その際作動ユニツトは常に正
しい姿勢を保つ。このことは、カルダン継手３か
ら作動ユニツト２におけるガイドローラへの距離
ａが（タンデム配置の）駆動ブロツク１′の中央
からカルダン継手３の距離ａとに等しい又はほゞ
等しいことから生ずるものである。 As can be seen from FIG. 3, with the device according to the invention, even pipes with relatively small bends can be penetrated, with the actuating unit always maintaining the correct position. This results from the fact that the distance a from the Cardan joint 3 to the guide roller in the actuating unit 2 is equal or approximately equal to the distance a of the Cardan joint 3 from the center of the drive block 1' (in tandem arrangement). .
結局第４図ａ、第４図ｂから明らかな様に、駆
動ローラのタンデム配置によつてパイプの枝管の
開口部１６上をも走行しうることになり、その際
その上を走行すべき最大の枝管の直径はタンデム
配置のローラ間の距離によつて予め与えられる。 After all, as is clear from FIGS. 4a and 4b, the tandem arrangement of the drive rollers makes it possible to run over the opening 16 of the pipe branch, and in this case, it is possible to run over the opening 16 of the branch pipe. The maximum branch pipe diameter is predetermined by the distance between the tandem rollers.
このことはその配置が第４図ｃに示されている
ガイドローラについても当て嵌まることである。 This also applies to the guide rollers whose arrangement is shown in FIG. 4c.
第１図はパイプ導管の内部における本装置の略
図的説明図であり、第２図は駆動ユニツトの中央
支持体における駆動ブロツクの配置を示す図であ
り、第３図は曲つたパイプ内に本装置を適用した
図であり、第４図ａ，ｂは駆動ローラ用のタンデ
ム配置を示すものであり、第４図ｃはガイドロー
ラの平行配置を示すものである。図中の参照番号
のうちの主なものを以下に示すことにする。
１……駆動ユニツト、２……作動ユニツト、３
……カルダン継手、４……駆動ローラ、５……駆
動ブロツク、６……中央支持体、７……タンデム
装置の中央、８……装置支持体、９……ガイドロ
ーラ。
1 is a schematic illustration of the device inside a pipe conduit, FIG. 2 shows the arrangement of the drive block in the central support of the drive unit, and FIG. 3 shows the arrangement of the device in a bent pipe. 4a and 4b show a tandem arrangement for the drive rollers, and FIG. 4c shows a parallel arrangement of the guide rollers. The main reference numbers in the figures are shown below. 1... Drive unit, 2... Actuation unit, 3
... Cardan joint, 4 ... Drive roller, 5 ... Drive block, 6 ... Central support, 7 ... Center of tandem device, 8 ... Device support, 9 ... Guide roller.
Claims (1)
多数の駆動ローラによつてパイプ内壁面を移動す
る装置において、該装置は駆動ユニツト１と、該
駆動ユニツト１とカルダン継手３によつて連結さ
れた作動ユニツト２とから構成され、前記駆動ユ
ニツト１にはその中央支持体６の周りに放射状に
配設された少なくとも３個の駆動ブロツク７が設
けられ、該駆動ブロツク７にはタンデム配置の駆
動ローラ４が各々パイプ内壁面に接触する状態で
配設され、上記作動ユニツト２は装置支持体８の
周りに放射状に配設され、かつパイプ内壁面に接
触する状態で配設された少なくとも３個のガイド
ローラ９を具備しており、該ガイドローラ９から
上記カルダン継手３への軸方向の距離ａと、上記
タンデム配置の駆動ローラ４間の中央から上記カ
ルダン継手３への軸方向の距離ａとはほぼ等しい
ことを特徴とするパイプ内壁面を移動する装置。 ２ 駆動ローラ４が各々の駆動ブロツク７上にダ
ブルタンデム配置の状態で設けられていることを
特徴とする特許請求の範囲第１項記載のパイプ内
壁面を移動する装置。 ３ ガイドローラ９が各々の方向に２個以上のロ
ーラを平行に配置した状態で設けられていること
を特徴とする特許請求の範囲第１項記載のパイプ
内壁面を移動する装置。 ４ 駆動ブロツク７が中央支持体６の周りに120°
の間隔を設けて放射状に配設されていることを特
徴とする特許請求の範囲第１項記載のパイプ内壁
面を移動する装置。 ５ ガイドローラ９が装置支持体８の周りに120°
の間隔を設けて放射状に配設されていることを特
徴とする特許請求の範囲第１項記載のパイプ内壁
面を移動する装置。[Claims] 1. Supported by itself by the inner wall surface of the pipe,
A device for moving the inner wall surface of a pipe using a large number of drive rollers, the device is composed of a drive unit 1 and an actuating unit 2 connected to the drive unit 1 by a cardan joint 3. is provided with at least three drive blocks 7 arranged radially around its central support 6, on which drive rollers 4 arranged in tandem are arranged, each in contact with the inner wall surface of the pipe. The actuating unit 2 is provided with at least three guide rollers 9 arranged radially around the device support 8 and in contact with the inner wall surface of the pipe. 9 to the Cardan joint 3 and the axial distance a from the center between the drive rollers 4 in the tandem arrangement to the Cardan joint 3 are approximately equal to each other. Moving equipment. 2. The device for moving the inner wall surface of a pipe according to claim 1, characterized in that the drive rollers 4 are provided on each drive block 7 in a double tandem arrangement. 3. The device for moving the inner wall surface of a pipe according to claim 1, characterized in that the guide rollers 9 are provided with two or more rollers arranged in parallel in each direction. 4 Drive block 7 rotates 120° around central support 6
2. A device for moving an inner wall surface of a pipe according to claim 1, wherein the devices are arranged radially at intervals of . 5 Guide roller 9 rotates 120° around device support 8
2. A device for moving an inner wall surface of a pipe according to claim 1, wherein the devices are arranged radially at intervals of .
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3224498.3 | 1982-06-28 | ||
| DE19823224498 DE3224498C2 (en) | 1982-06-28 | 1982-06-28 | Pipe Newt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5913200A JPS5913200A (en) | 1984-01-23 |
| JPH0338149B2 true JPH0338149B2 (en) | 1991-06-07 |
Family
ID=6167273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11679583A Granted JPS5913200A (en) | 1982-06-28 | 1983-06-28 | Pipe-scraper |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5913200A (en) |
| DE (1) | DE3224498C2 (en) |
| FR (1) | FR2529295B1 (en) |
| GB (1) | GB2122713B (en) |
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| DE3419683A1 (en) * | 1984-05-24 | 1985-11-28 | Mannesmann AG, 4000 Düsseldorf | PIPE PIG WITH CHASSIS |
| GB2190722A (en) * | 1986-05-20 | 1987-11-25 | British Nuclear Fuels Plc | Pipework inspection apparatus |
| DE3818853A1 (en) * | 1988-06-03 | 1989-12-14 | Gottfeld F H Werkstoffpruefung | Apparatus for the non-destructive testing of pipelines |
| DE3836277A1 (en) * | 1988-10-25 | 1990-05-10 | Schlick Heinrich Gmbh Co Kg | Manipulator arm |
| DE4133431C2 (en) * | 1991-10-09 | 1993-10-28 | Scharf Gmbh Maschf | Trackless vehicle |
| NO178276C (en) * | 1992-12-01 | 1996-02-21 | Ole Molaug | A vehicle |
| FR2724458B1 (en) * | 1994-09-12 | 1996-12-13 | Intercontrole Sa | DRIVE MODULE FOR ENDO-TUBULAR VEHICLE WITH AUTONOMOUS MOVEMENT FOR PIPE INSPECTION |
| DE19511310C1 (en) * | 1995-03-28 | 1996-05-15 | Siemens Ag | Inner pipe manipulator |
| GB9510317D0 (en) * | 1995-05-22 | 1995-07-19 | British Gas Plc | Self-centering suspension for in-pipe use |
| CH690595A5 (en) * | 1996-04-12 | 2000-10-31 | Ka Te System Ag | Control means for a fluid aggregates exhibiting device and device for rehabilitating pipes. |
| NL1003857C1 (en) * | 1996-08-22 | 1998-02-26 | Roentgen Tech Dienst Bv | Pipeline inspection method, pipeline cleaning, and apparatus for carrying out such methods. |
| DE10215325A1 (en) * | 2002-04-02 | 2003-10-23 | Fraunhofer Ges Forschung | Robot for inspection/cleaning/ repair of channels e.g. sewage pipes and similar consists of hub-like central body with three extendable supports moving along channel wall, with sensor device and tool |
| DE202010005845U1 (en) | 2010-04-19 | 2010-10-14 | Lorenz, Martin | Mechatronic worm-like motion system for tubular elements |
| CN102642169B (en) * | 2012-04-01 | 2014-02-19 | 茂名重力石化机械制造有限公司 | Automatic polishing device for inner tube of loop reactor |
| DE102016104412B3 (en) * | 2016-03-10 | 2017-08-17 | Areva Gmbh | Manipulator and manipulator unit |
| CN106284637B (en) * | 2016-08-29 | 2018-11-27 | 山东胜伟盐碱地科技有限公司 | A kind of hidden pipe descaling machine cleaning pipe supporting mechanism |
| CN110340083B (en) * | 2019-07-18 | 2021-06-11 | 辽宁工程技术大学 | Pipeline cleaning mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2604521A (en) * | 1948-06-09 | 1952-07-22 | Cormack E Boucher | Conduit tractor |
| FR1197088A (en) * | 1957-01-04 | 1959-11-27 | Apparatus for tarring and cleaning the inner walls of water supply pipes | |
| CH402531A (en) * | 1963-04-05 | 1965-11-15 | Johann Reinhart Alberto | Thruster for pipe cleaning device |
| GB1116785A (en) * | 1966-07-14 | 1968-06-12 | C W Fuelling Inc | Pipe joint locator |
| US3593122A (en) * | 1969-03-27 | 1971-07-13 | Amf Inc | Method and apparatus for identifying hardspots in magnetizable material |
| US3758050A (en) * | 1969-11-25 | 1973-09-11 | R Watts | Photo inspection pod assembly for pipelines |
| CA953364A (en) * | 1970-07-20 | 1974-08-20 | Amf Incorporated | Apparatus and method for pipeline inspection |
| US3775612A (en) * | 1970-12-14 | 1973-11-27 | Monroe X Ray Co | Pipeline x-ray inspection machine |
| US3703947A (en) * | 1971-03-08 | 1972-11-28 | Int Pipeline Services Inc | Internal pipeline coating apparatus |
| US3786684A (en) * | 1971-12-27 | 1974-01-22 | Automation Ind Inc | Pipeline inspection pig |
| US3940855A (en) * | 1974-07-19 | 1976-03-02 | T. D. Williamson, Inc. | Pipeline pig |
| GB1501971A (en) * | 1975-01-20 | 1978-02-22 | Ross Lar | Method and apparatus for cleaning the inside of long cylindrical chambers |
| US3974680A (en) * | 1975-05-27 | 1976-08-17 | Inspection Technology Development, Inc. | Pipeline leak detector |
| US4170902A (en) * | 1978-05-18 | 1979-10-16 | British Gas Corporation | Pipeline inspection vehicles |
| FR2435974A1 (en) * | 1978-09-15 | 1980-04-11 | Entreprises Soc Gle | METHOD AND APPARATUS FOR UNCOUPLING CLOSED DUCTS |
| GB2088554A (en) * | 1980-11-28 | 1982-06-09 | Pls Pipeline Service Uk Ltd | Pipeline route surveying device |
-
1982
- 1982-06-28 DE DE19823224498 patent/DE3224498C2/en not_active Expired
-
1983
- 1983-06-24 FR FR8310481A patent/FR2529295B1/en not_active Expired
- 1983-06-27 GB GB08317388A patent/GB2122713B/en not_active Expired
- 1983-06-28 JP JP11679583A patent/JPS5913200A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2529295B1 (en) | 1986-02-21 |
| JPS5913200A (en) | 1984-01-23 |
| GB2122713A (en) | 1984-01-18 |
| DE3224498A1 (en) | 1984-02-02 |
| GB8317388D0 (en) | 1983-07-27 |
| FR2529295A1 (en) | 1983-12-30 |
| DE3224498C2 (en) | 1987-02-12 |
| GB2122713B (en) | 1986-02-26 |
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