JPS5819531A - Method for detecting damage in dual pipes - Google Patents
Method for detecting damage in dual pipesInfo
- Publication number
- JPS5819531A JPS5819531A JP56117060A JP11706081A JPS5819531A JP S5819531 A JPS5819531 A JP S5819531A JP 56117060 A JP56117060 A JP 56117060A JP 11706081 A JP11706081 A JP 11706081A JP S5819531 A JPS5819531 A JP S5819531A
- Authority
- JP
- Japan
- Prior art keywords
- liquid level
- annular space
- pipe
- water
- liquid
- 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
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
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/283—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes for double-walled pipes
-
- 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
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Pipeline Systems (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は二重管方式のパイプツインにおいて二重管の内
筒ｌび外筒の破損を検知し、更には内筒かもの内部輸送
流体の微量な漏洩を測定するための二重管破損検知方法
に関するものである。[Detailed Description of the Invention] The present invention detects damage to the inner tube and outer tube of the double tube type pipe twin, and further measures the slight leakage of the fluid transported inside the inner tube. The present invention relates to a method for detecting damage to double pipes.
石ｉｌ１等の如會愈歇物流体を輸送するパイプラインに
か番％′Ｃ鯰安全確像のために輸送管としては内筒と外
筒とから虞る二重管を使用し、万一内筒が彼ＩＩシ内郁
の輸送流体が漏洩したとしても外筒の働會鉱より外部へ
の輸送流体の漏洩、拡散を防止するよう鉱量−されてい
る場合がある。しかしな＃ち１．このよう１二重管の使
用により内筒の破損によ墨外部への輸送流体の１ｉｅｓ
は一時的には防止し得るが愈験防止のために内筒は早急
に修理せねげならずそのために斯る内筒の破損事故は直
ち（探知されねばならない、又、二重管の外筒が破損す
ることも考えられる。従って二重管の内筒又は外筒のい
ずれであっても破損事故があった場谷には出来るだけ早
く事故発生の事実を検知し且つ輸送流体がどの程度漏出
したかを速かに測定することが重要である。In order to ensure safety, a double pipe with an inner pipe and an outer pipe is used as a transport pipe to transport fluids such as stone, etc. In some cases, the inner cylinder has a mineral content that prevents the transport fluid from leaking and spreading to the outside from the working area of the outer cylinder even if the transport fluid inside the cylinder leaks. However, #chi1. In this way, the use of a single double pipe prevents damage to the inner pipe from transporting fluid to the outside.
Although this can be temporarily prevented, the inner cylinder must be repaired immediately to prevent the accident. Therefore, such damage to the inner cylinder must be detected immediately, and the damage to the outside of the double pipe must be detected immediately. It is also possible that the cylinder is damaged.Therefore, in the event of a breakage accident in either the inner or outer cylinder of a double pipe, it is important to detect the fact of the accident as soon as possible and check the extent of the transport fluid. It is important to quickly determine if there is a leak.
従来、二重管における輸送流体漏洩検知方法が柚々提案
されているが、上記諸要求を完全に満足せしめるものは
ない。つまり従来の方法は、（１）パイプラインに、即
ち、二重管の内筒に直接流量針を設置し、流−〇変動に
より輸送流体の漏洩を検知し且つ漏洩量を測定する方法
、（２）漏油検知ケーブルによる方法、及び（３）二重
管の内筒と外筒との鴎に流体（水又は屋素ガス等）を充
填し圧力食孔を検知する方法に大きく分類することがで
きるが、上記（１）の方法は流ｉｔｔの精度に起因する
問題のために大径管による大流量の輸送流体に対する内
筒からの微量な漏洩を検知するのは極めて困難であると
いう問題を有し、（２）の方法は漏洩した輸送流体の実
際の輩を検知することができす又漏洩事実を検知するま
での時間が長くかかるという間層を有し、更に（３）の
方法は熱による管自体の変形及び充填された流体の温度
による体積変化のために検知精度が十分に得られないと
いった問題を有している。Conventionally, many methods for detecting leakage of transport fluid in double pipes have been proposed, but none completely satisfies the above requirements. In other words, the conventional methods are: (1) a method in which a flow needle is installed directly in the pipeline, that is, in the inner cylinder of a double pipe, and the leakage of the transport fluid is detected by flow fluctuations and the leakage amount is measured; It can be broadly classified into 2) a method using an oil leakage detection cable, and (3) a method that detects pressure corrosion by filling the inner and outer cylinders of a double pipe with fluid (water or nitrogen gas, etc.). However, the problem with method (1) above is that it is extremely difficult to detect a small amount of leakage from the inner cylinder for a large flow of fluid transported by a large diameter pipe due to the problem caused by the accuracy of the flow rate. The method (2) is capable of detecting the actual source of the leaked transport fluid, and the method (3) has the disadvantage that it takes a long time to detect the leakage fact. This method has the problem that sufficient detection accuracy cannot be obtained due to deformation of the tube itself due to heat and volume change due to temperature of the filled fluid.
従って本発明の主たる目的は、従来の方法が有していた
上記のような間顯点を解決した新規な二重管破損検知方
法を提供することである。Therefore, the main object of the present invention is to provide a new double pipe breakage detection method that solves the above-mentioned problems of the conventional methods.
本発明の目的は、大径内筒からの微量の漏洩であっても
確実に検知し且つその漏洩量を測定することのできる二
重管破損検知方法を提供することである。An object of the present invention is to provide a double pipe breakage detection method that can reliably detect even a minute amount of leakage from a large-diameter inner cylinder and measure the amount of leakage.
本発明の他の目的は、短時間にて二重管大径内筒からの
輸送流体の漏洩を検知することのできる二重管破損検知
方法を提供することである。Another object of the present invention is to provide a double pipe breakage detection method that can detect leakage of transport fluid from a double pipe large-diameter inner cylinder in a short time.
本発明の他の目的は、輸送流体の漏洩場所、即ち、二重
管の破損部所を迅速に探索することのできる二重管破損
検出方法を提供することである。Another object of the present invention is to provide a method for detecting damage to a double pipe, which can quickly locate a leakage location of a transport fluid, that is, a damaged part of a double pipe.
本発明の更に他の目的は、外筒の破損をも迅速に検知す
ることのできる二重管破損検出方法を提供することであ
る。Still another object of the present invention is to provide a method for detecting damage to a double pipe, which can quickly detect damage to an outer cylinder.
上記本発明の諸目的は、石油の如き輸送流体が加圧下に
て流動する内筒と、該内筒のまわりに、同中心にて又は
偏心状態にて該内筒を囲包して装置された外筒とから成
る二重管において、前記内筒と外筒との間に影威された
環状空間を隔壁で複数に区分し、該区分された各環状空
間は水又は他の液体（例えば水に防食添加剤及び／又は
不凍液を混入したもの）を充填しそして導管に、て流量
針及び液面監視ドラムに流体連通せしめ、前記内筒破損
時には内部の加圧輸送流体が環状空間の充填水を加圧し
それによって押し上げられた前記液面監視ドラム内の上
昇液面豪検知し、前記外筒破損時には環状空間の充填水
が外筒外へと流出しそれによって低下した前記液面監視
ドラム内の降下液面を検出して警報信号を発するように
構成された二重管破損検知方法によって達成、される０
本発明に係る二重管破損検知方法にかいては液面監視ド
ラム内の液面を検知すると共に流量針によって輸送流体
の漏洩量が測定される。パ−、−
次に、本発明に係る二重管破損検知方法について図面を
参Ｉｎて更に詳しく説明する。The above-mentioned objects of the present invention include an inner cylinder through which a transport fluid such as oil flows under pressure, and a device that surrounds the inner cylinder concentrically or eccentrically. In a double pipe consisting of an outer cylinder and an outer cylinder, the annular space between the inner cylinder and the outer cylinder is divided into a plurality of parts by partition walls, and each divided annular space is filled with water or other liquid (e.g. The pipe is filled with water mixed with anticorrosive additives and/or antifreeze) and is in fluid communication with the flow needle and the liquid level monitoring drum through a conduit, so that when the inner cylinder breaks, the internal pressurized transport fluid fills the annular space. Detects the rising liquid level in the liquid level monitoring drum that pressurizes water and pushes it up, and when the outer cylinder breaks, the water filled in the annular space flows out of the outer cylinder and the liquid level falls as a result. 0 achieved by a double pipe break detection method configured to detect a falling liquid level within the pipe and issue an alarm signal.
In the double pipe breakage detection method according to the present invention, the liquid level in the liquid level monitoring drum is detected and the amount of leakage of the transport fluid is measured using a flow rate needle. Next, the double pipe breakage detection method according to the present invention will be explained in more detail with reference to the drawings.
石油のような可燃性や危険物流体Ｐを輸送する二重管１
４；ｉ、輪逮流体Ｐを加圧下に流動せしめる内筒！と、
該内筒２を囲包して配置された外筒４とから成る。内筒
２と外筒４とによって形成される環状空ＩＩは隔壁４に
よって複数の環状空間８に区分される０区分されＴｈ４
環状空間８は導管８及びプ璽ツタ弁１０を介して主導管
１２に連通される。主導ｇ１ｘは流量計１４を介して液
面監視ドラム１４に接続される。弁２ｏを備えた給水管
１Ｂ、かシ番票状空間に杢−充填きれる。５各環状空間
８に接続され下髪する導管２２及び弁２４鯰給水管１８
から各環状空間、８に水を充填する際の通気手段である
。Double pipe 1 for transporting flammable or hazardous fluid P such as petroleum
4; i, inner cylinder that allows the wheel arresting fluid P to flow under pressure! and,
It consists of an outer cylinder 4 arranged to surround the inner cylinder 2. The annular space II formed by the inner cylinder 2 and the outer cylinder 4 is divided into a plurality of annular spaces 8 by the partition wall 4.
The annular space 8 communicates with a main conduit 12 via a conduit 8 and a valve 10 . The lead g1x is connected to the liquid level monitoring drum 14 via a flow meter 14. The water supply pipe 1B equipped with the valve 2o can be filled with water into the square-shaped space. 5 Conduit 22 and valve 24 connected to each annular space 8 and connected to the lower part 24 Catfish water supply pipe 18
This is a ventilation means when filling each annular space 8 with water.
番ｍ歌空関−に水が充填された状態にて弁２゜及び！４
は簡鎖され、−プ讐ツタ弁１ｏは開とされて埴る。叉、
液面監視ドラム１６内の液面は正常歇ＩＩＩ （Ｎ）の
位置にある。この正常状態下に、即ち、二重管に何艶異
常のない状態にて、もし内筒２が破損したとする。内筒
２内の加圧輸送流体Ｐは破損部より該破損部に対応した
環状空間Ｓ内へと流入する。従って環状空間８の圧力は
増大し、環状空間内の水は加圧され、導管８及び弁１０
、並びに主導管１２及び流量計１４を通って液面監視ド
ラム１６へと送出される。従って、液面監視ドラム１６
内の液面は上昇する。液面が所定の「液面高警報」位置
Ｈに達すると液面検知手段２６により警報装置２８を作
動せしめる。液面検知手段２４は周知の手段であってよ
く、赤外ｉＩＩ等を用いた非接触式のもの、又は浮子を
使用した接触式のも、のとすることができる。又警報装
置２８は単にブザー等であってもよく、更には輸送流体
Ｐの供給弁−その他を自動的に閉鎖又は制御するような
信号をも発生せしめるように構成することができる。With water filled in No. M, valve 2° and! 4
is simplified, and the ivy valve 1o is opened and hung. Fork,
The liquid level in the liquid level monitoring drum 16 is at the normal position III (N). Suppose that the inner tube 2 is damaged under this normal condition, that is, when there is no abnormality in the double tube. The pressurized transport fluid P in the inner cylinder 2 flows from the broken part into the annular space S corresponding to the broken part. The pressure in the annular space 8 therefore increases, the water in the annular space becomes pressurized, and the conduit 8 and valve 10
, as well as through the main pipe 12 and flow meter 14 to the liquid level monitoring drum 16. Therefore, the liquid level monitoring drum 16
The liquid level inside rises. When the liquid level reaches a predetermined "liquid level high alarm" position H, the liquid level detection means 26 activates the alarm device 28. The liquid level detection means 24 may be a well-known means, and may be a non-contact type using infrared III or the like, or a contact type using a float. Further, the alarm device 28 may be simply a buzzer or the like, and may also be configured to generate a signal to automatically close or control the supply valve of the transport fluid P, etc.
流量計１４によって主導管１２を流動した流体の量、即
ち、輸送流体デの内筒２からの漏出量が測定される。流
量針１４は所望に応じた精度のものを使用することがで
きる。流量計１４の下流側には、本実施例においては液
面監視ドラム１４の上方部には二重管からの漏出流体を
処理するために該漏出流体を適当な処理装置に導入する
ための排液導管ＳＯ及び弁３２が連結される。The flow meter 14 measures the amount of fluid flowing through the main pipe 12, that is, the amount of transport fluid leaking from the inner cylinder 2. The flow rate needle 14 can be of any precision as desired. On the downstream side of the flow meter 14, in this embodiment, above the liquid level monitoring drum 14, there is a drain for introducing the leaked fluid from the double pipe into a suitable treatment device in order to treat the fluid leaked from the double pipe. Liquid conduit SO and valve 32 are connected.
次に、二重管の外筒４が破損した場合について説明する
と、この場合には破損した箇所の環状空間Ｓの水が外部
へと流出し、従って主導管１２から流体が環状空間Ｓへ
と逆流することとなる。これにより液面監視ドラム１６
内の液面は降下する。Next, a case will be explained in which the outer cylinder 4 of the double pipe is damaged. In this case, water in the annular space S at the damaged location flows out to the outside, and therefore fluid flows from the main pipe 12 into the annular space S. The flow will flow backwards. As a result, the liquid level monitoring drum 16
The liquid level inside will fall.
液面が所定の「液面低警報」位置りに達すると前記液面
検知手段２６により前記警報装置２８を作動せしめる。When the liquid level reaches a predetermined "low liquid level alarm" position, the liquid level detection means 26 activates the alarm device 28.
以上１制した二重管の内筒又は外筒のいずれの破損部て
あっても、警報装置２８の作動後、各環状空間８毎にプ
田ツタ弁１Ｇを順次閉止し、流量針１４が作動しなくな
った箇所を見出すことによって破損部位を容易に探索す
ることができる。Ｉｌ管・に全て流量針を取りつけて破
損部をより早く探索することもできる。叉例えば内筒の
径が２４インチ（６１ａ＋）以上の場合に概略１００１
１とされる６隔１１４の間隔を更に短くすることによっ
て、つまり、内筒と外筒との開の環状空間を細分化する
ことによって破損部の精確な探索がより容易になる。Regardless of whether the inner or outer cylinder of the double-pipe pipe is damaged, after the alarm device 28 is activated, the puta ivy valves 1G are sequentially closed for each annular space 8, and the flow rate needle 14 is The damaged area can be easily searched for by finding the point where it has stopped working. It is also possible to locate the damaged part more quickly by attaching flow needles to all Il tubes. For example, if the diameter of the inner cylinder is 24 inches (61a+) or more, approximately 1001
By further shortening the interval between the six intervals 114, that is, by dividing the open annular space between the inner cylinder and the outer cylinder into smaller parts, it becomes easier to accurately search for the damaged part.
又、液面監視ドラム１６０「液面高警報」位置■及び「
液面低警報」位置りは二重管の熱膨張による液面の上下
の範匪以上に設定されることが理解されるであろう。更
に、内筒と外筒との間に充填される流体は任意の流体で
あってよいが、取扱いの容易さ、安全性及び経済性の点
から水又は水に防食添加剤及び／又は不凍液を混入した
ものが最も好ましいであろう。Also, the liquid level monitoring drum 160 “liquid level high alarm” position ■ and “
It will be understood that the "low liquid level alarm" position is set above and below the range of the liquid level due to thermal expansion of the double pipe. Further, the fluid filled between the inner cylinder and the outer cylinder may be any fluid, but from the viewpoint of ease of handling, safety, and economic efficiency, it is preferable to add anticorrosion additives and/or antifreeze to water or water. Mixed substances would be most preferred.
本発明に係る二重管破損検知方法は、大径管からの微量
漏洩を迅速に且つ確実に検知することができ、又外筒の
破損をも検知てき、更には漏洩部位の迅速な探索も可能
であるという作用効果を有する。The method for detecting damage to a double pipe according to the present invention can quickly and reliably detect a small amount of leakage from a large diameter pipe, can also detect damage to an outer cylinder, and can also quickly search for the leakage site. It has the effect of being possible.
図面は本発明に係る二重管破損検知方法を実施するため
の装置の一実施態様を示す概略図である。
１：二重管
２：内筒
４：外筒
６：隔壁
８．１２！導管
１０ニブジツタ弁
１４：流量針
１６！液面監視ドラムThe drawing is a schematic diagram showing an embodiment of an apparatus for carrying out the double pipe breakage detection method according to the present invention. 1: Double tube 2: Inner tube 4: Outer tube 6: Partition wall 8.12! Conduit 10 Nibujita valve 14: Flow rate needle 16! Liquid level monitoring drum
Claims (1)
配置された外筒とから成る二重管において、前記内筒と
外筒との間に杉成される環状空間を隔壁でＩＩ数に区分
し、区分された各環状空間は液体を充填しそして導管に
て流量針及び液面監視ドラムに流体連通せしめ、前記内
筒破損時には内筒内の加圧輸送流体が環状空間充填液体
を加圧しそれによって押し上げられた前記液面監視ドラ
ム内の液面を検知して伽−を発生せしめ、同時に前記流
閂計によって漏洩流体蓋を測定するようにし、又外筒破
損時には環状空間内の充填液体が外部に振出しそれによ
って降下した前記筐体監視ドラム内の液面を検知し動転
を発生せしめ、二重管の内筒及び外筒の破損を検知し、
且つ内筒からの内部輸送流体の機態な漏洩を曲走するよ
うにした二重管破損検知方法。 り各環歌空関充填液体は水、又は水に防食添加剤及び／
叉は不凍液を混入した液体である特許請求の籠［籐１項
記職の二重管破損検知方法。[Scope of Claims] 1) In a double pipe consisting of an inner cylinder through which a pressurized transport fluid flows and an outer cylinder arranged to surround the inner cylinder, there is a pipe between the inner cylinder and the outer cylinder. The formed annular space is divided into two parts by partition walls, and each divided annular space is filled with liquid and communicated with the flow rate needle and the liquid level monitoring drum through a conduit. The pressurized transport fluid pressurizes the annular space-filling liquid, thereby detecting the liquid level in the liquid level monitoring drum pushed up to generate a chasm, and at the same time measuring the leakage fluid cap with the flow bar meter. In addition, when the outer cylinder is damaged, the filled liquid in the annular space is shaken out to the outside, and the lowered liquid level in the housing monitoring drum is detected, causing movement, which prevents damage to the inner and outer cylinders of the double pipe. detect,
In addition, a method for detecting damage to a double pipe in which mechanical leakage of internal transport fluid from the inner cylinder is detected. The filling liquid in each ring is water or water with anti-corrosion additives and/or
Or a liquid mixed with antifreeze, which is claimed in the patent claim [Rattan Paragraph 1, double pipe damage detection method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56117060A JPS5819531A (en) | 1981-07-28 | 1981-07-28 | Method for detecting damage in dual pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56117060A JPS5819531A (en) | 1981-07-28 | 1981-07-28 | Method for detecting damage in dual pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5819531A true JPS5819531A (en) | 1983-02-04 |
| JPS6260016B2 JPS6260016B2 (en) | 1987-12-14 |
Family
ID=14702428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56117060A Granted JPS5819531A (en) | 1981-07-28 | 1981-07-28 | Method for detecting damage in dual pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5819531A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009128129A (en) * | 2007-11-21 | 2009-06-11 | Osaka Gas Co Ltd | Piping leak spot detecting method |
| US7857553B2 (en) | 2007-09-28 | 2010-12-28 | Pan Pacific Copper Co., Ltd. | Transfer pipe of dried concentrate and breakage detecting method of transfer pipe |
| CN107654848A (en) * | 2017-09-28 | 2018-02-02 | 北京华航无线电测量研究所 | A kind of pipeline location and direction detection method |
| US11143565B2 (en) * | 2020-02-28 | 2021-10-12 | Trinity Bay Equipment Holdings, LLC | Reusable pipe integrity test head systems and methods |
-
1981
- 1981-07-28 JP JP56117060A patent/JPS5819531A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7857553B2 (en) | 2007-09-28 | 2010-12-28 | Pan Pacific Copper Co., Ltd. | Transfer pipe of dried concentrate and breakage detecting method of transfer pipe |
| JP2009128129A (en) * | 2007-11-21 | 2009-06-11 | Osaka Gas Co Ltd | Piping leak spot detecting method |
| CN107654848A (en) * | 2017-09-28 | 2018-02-02 | 北京华航无线电测量研究所 | A kind of pipeline location and direction detection method |
| US11143565B2 (en) * | 2020-02-28 | 2021-10-12 | Trinity Bay Equipment Holdings, LLC | Reusable pipe integrity test head systems and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6260016B2 (en) | 1987-12-14 |
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