JPS6034600A - Piping rupture detection device - Google Patents
Piping rupture detection deviceInfo
- Publication number
- JPS6034600A JPS6034600A JP14224683A JP14224683A JPS6034600A JP S6034600 A JPS6034600 A JP S6034600A JP 14224683 A JP14224683 A JP 14224683A JP 14224683 A JP14224683 A JP 14224683A JP S6034600 A JPS6034600 A JP S6034600A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- rupture
- elastic wave
- piping
- detectors
- 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.)
- Pending
Links
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- Examining Or Testing Airtightness (AREA)
- Pipeline Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は流体を流通する配管の破断を検出する配管破断
検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a pipe breakage detection device for detecting a breakage in a pipe through which fluid flows.
［発明の技術的背景とその問題点］
例えば内部を高圧の流体が流れる配管が大規模に使用さ
れる発電プラントやイヒ学プラントのようなブＯセスプ
ラントにおし）で１よ、これらの配管に破断が生じた場
合、その事実を迅速に認識するとともに、破断の発生し
た位置を正確に知ることがプラント管理上非常に重要で
ある。[Technical background of the invention and its problems] For example, in a power plant or a process plant such as a power plant or industrial plant where piping through which high-pressure fluid flows is used on a large scale, 1. When a break occurs in a pipe, it is very important for plant management to quickly recognize the fact and to accurately know the location where the break occurs.
しかしながら、配管に破断が生じたことは目視により確
認できるが、プラントの規模が大きくなると全配管を常
時見回ることは容易でなく、特に原子力発電プラントの
ように人間の接近が運転中困難な配管では、配管に生ず
る破断を目視により確認することは不可能である。However, although it is possible to visually confirm that a pipe has ruptured, as the scale of the plant increases, it is not easy to constantly inspect all pipes, especially in nuclear power plants where it is difficult for humans to access the pipes during operation. , it is impossible to visually confirm the breakage that occurs in the piping.
そこで、モニターテレビ等を使用する方法が行われてい
るが、この方法も大ＮＡ模な配管を常時監視するには効
率的な方法とはいえない。Therefore, a method of using a monitor television or the like has been used, but this method cannot be said to be an efficient method for constantly monitoring piping with a large NA.
また、高圧配管が破断したことを発見する方法として、
配管内部の圧力を測定し、圧力降下があった場合に警報
を発するという装置も開発され°Ｃいるが、この場合に
は破断口の位置を検出するため、配管上に多数の圧力計
を配管に穴を開けて取付ける必要があり、圧力計を設置
した部分の配管強度が低下するという問題がある。In addition, as a way to discover that high pressure piping has broken,
A device has been developed that measures the pressure inside the pipe and issues an alarm if there is a pressure drop. It is necessary to drill a hole to install the pressure gauge, which poses the problem of reducing the strength of the piping where the pressure gauge is installed.
ざらに前述したような方法では、モニターテレピあるい
は圧力計の設置に多大な費用がかかり、プラントのコス
トが高くなるという問題がある。The method briefly described above has the problem that it costs a lot of money to install a monitor television or a pressure gauge, which increases the cost of the plant.
［発明の目的］
本発明はかかる従来の事情に対処してなされたもので、
配管に破断が生じた場合に、この配管の破断口の位置を
迅速かつ確実に検出することのできる配管破断検出装置
を提供しようとするものである。[Object of the invention] The present invention has been made in response to such conventional circumstances,
It is an object of the present invention to provide a pipe break detection device that can quickly and reliably detect the position of a break in a pipe when a break occurs in the pipe.
し発明の概要］
すなわち本発明は、流体を流通する配管の破断を検出す
る配管破断検出装置において、前記配管またはこれに接
続される構造物上の異なる位置に配設され前記配管の破
断により生じこの配管または前記構造物を伝播する弾性
波を検出する複数の弾性波検出器と、これらの弾性波検
出器がそれぞれ前記弾性波を検出した検出時刻の時間差
により前記配管の破断口の位置を推定する破断位置推定
装置とからなることを特徴とする配管破断検出装置であ
る。Summary of the Invention] That is, the present invention provides a pipe rupture detection device for detecting a rupture in a pipe through which fluid flows, which is disposed at different positions on the pipe or a structure connected to the pipe and detects a break caused by a rupture in the pipe. Estimating the position of the break in the pipe based on the time difference between a plurality of elastic wave detectors that detect elastic waves propagating through the pipe or the structure and the detection times at which the elastic waves are detected by each of these elastic wave detectors. This is a pipe breakage detection device characterized by comprising a breakage position estimating device.
［発明の実施例］
以下本発明の詳細を図面に示す一実施例について説明す
る。[Embodiment of the Invention] The details of the present invention will be described below with reference to an embodiment shown in the drawings.
第１図は本発明の一実施例の配管破断検出装置が適用さ
れる沸騰水形原子力発電プラントを示すもので、図にお
いて符号１は原子炉圧力容器を示している。原子炉圧力
容器１の上部側面にはタービン２に接続される主蒸気管
３が接続されており、この主蒸気管３には主蒸気隔離弁
４が配設されている。タービン２には、このタービン２
の回転により駆動される発電機５が配設されており、ま
たタービン２の下部には復水器６が配設されている。FIG. 1 shows a boiling water nuclear power plant to which a pipe rupture detection device according to an embodiment of the present invention is applied, and in the figure, reference numeral 1 indicates a reactor pressure vessel. A main steam pipe 3 connected to a turbine 2 is connected to an upper side surface of the reactor pressure vessel 1, and a main steam isolation valve 4 is disposed in the main steam pipe 3. This turbine 2
A generator 5 driven by the rotation of the turbine 2 is disposed, and a condenser 6 is disposed below the turbine 2.
復水器６と原子炉圧力容器１とは給水ポンプ７の介挿さ
れる給水配管８により接続されている。The condenser 6 and the reactor pressure vessel 1 are connected by a water supply pipe 8 into which a water supply pump 7 is inserted.
そして主蒸気管３の主蒸気隔離弁４下流近傍およびター
ビン２の上流近傍には弾性波検出器９ａ、９ｂそれぞれ
が配設され、これらの弾性波検出器９ａ 、９ｂは破断
位置推定装置１０に電気的に接続されている。Elastic wave detectors 9a and 9b are provided near the downstream of the main steam isolation valve 4 of the main steam pipe 3 and near the upstream of the turbine 2, respectively, and these elastic wave detectors 9a and 9b are connected to the fracture position estimation device 10. electrically connected.
以上のように構成され７Ｃ沸騰水形原２子ノＪ発電プラ
ントでは、原子炉圧力容器１内で発生した蒸気は主蒸気
管３を通りタービン２に流入し、タービン２および発電
機５を回転駆動し復水器６に流入し、ここで冷却凝縮さ
れ復水とされた後、給水ポンプ７で昇圧された後、給水
配管８を通り原子炉圧力容器１に再循環する。In the 7C boiling water nuclear power generation plant configured as described above, steam generated in the reactor pressure vessel 1 flows into the turbine 2 through the main steam pipe 3 and drives the turbine 2 and generator 5 to rotate. The water flows into the condenser 6, where it is cooled and condensed to form condensate, and after being pressurized by the water supply pump 7, it passes through the water supply pipe 8 and is recirculated to the reactor pressure vessel 1.
第２図は本発明の一実施例の配管破断検出装置を示すも
ので、この配管破断検出装置は弾性波検出器９ａ 、
９ｂ 、フィルター１１ａ、１１ｂ、タイマ１２ａ、１
２ｂ１破断位置推定装置１３、および警報表示装［１５
とから構成されている。FIG. 2 shows a pipe breakage detection device according to an embodiment of the present invention, and this pipe breakage detection device includes an elastic wave detector 9a,
9b, filter 11a, 11b, timer 12a, 1
2b1 fracture position estimation device 13 and alarm display device [15
It is composed of.
弾性波検出器９ａ 、９ｂは主蒸気管３の破断により生
ずる弾性波を検出する。The elastic wave detectors 9a and 9b detect elastic waves caused by a break in the main steam pipe 3.
すなわち、例えば、第１図に示すへ点で主蒸気管３が破
断すると、この主蒸気管３の内部は高圧の蒸気により満
たされているため、この蒸気が主蒸気管３から高速のジ
ェットとして放出され、その反作用として主蒸気管３の
破断個所において主蒸気管３に変形が生じ、この変形は
主蒸気管３の内部を弾性波として伝播する。そこで主蒸
気管３の破断を、この弾性波検出器９ａ 、９ｂにより
知ることかできる。That is, for example, if the main steam pipe 3 breaks at the point shown in FIG. As a reaction, deformation occurs in the main steam pipe 3 at the breakage point of the main steam pipe 3, and this deformation propagates inside the main steam pipe 3 as an elastic wave. Therefore, a break in the main steam pipe 3 can be detected by the elastic wave detectors 9a and 9b.
フィルター１１ａ１１１ｂは定常運転中のプラント内の
雑音を除去する。The filter 11a111b removes noise within the plant during steady operation.
タイマ１２ａ、１２ｂは弾性波検出器９ａ１９ｂからフ
ィルター１１ａ、ｌｌｂを介して入力される信号をそれ
ぞれ入力し、弾性波検出器９ａ。The timers 12a and 12b receive signals input from the elastic wave detector 9a19b via the filters 11a and llb, respectively, and the elastic wave detector 9a.
９ｂが弾性波を検出した時刻の時間差を測定する。9b measures the time difference between the times when the elastic waves are detected.
破断位置推定装置１３はこれらの時間差に基づいて主蒸
気管３の破断孔Ａの位置を推定する。The break position estimating device 13 estimates the position of the break hole A in the main steam pipe 3 based on these time differences.
すなわち、主蒸気管３上の弾性波の伝播速度を一定と仮
定し、弾性波検出器９ａ 、９ｂが弾性波を検出した時
刻をそれぞれＴ１、Ｔ２、また主蒸気管３上における弾
性波の伝播速度をＣとれば、破断孔Ａの位置は１対の弾
性波検出器９ａ 、 ９ｂの中央点からＣ・（Ｔ＋ −
Ｔｚ ）だけ弾性波検出器９ａ側へ寄っていることが推
定できる。That is, assuming that the propagation speed of the elastic wave on the main steam pipe 3 is constant, the times at which the elastic wave detectors 9a and 9b detect the elastic wave are T1 and T2, respectively, and the propagation of the elastic wave on the main steam pipe 3 is If the speed is C, the position of the rupture hole A is C・(T+ −
It can be estimated that the distance Tz ) is closer to the elastic wave detector 9a side.
警報表示装置１５は破断位置推定装置１３で推定された
破断位置を表示する。The alarm display device 15 displays the fracture position estimated by the fracture position estimation device 13.
第３図は本発明の他の実施例を示すもので１この実施例
では主蒸気管３に構造物１６が接続されており、ｍ造物
１６の接続点、構造物１６の接続点上流近傍、構造物１
６の接続点下流に３個の弾性波検出器９ａ 、９ｂ 、
９ｃがそれぞれ配設されている。FIG. 3 shows another embodiment of the present invention. 1 In this embodiment, a structure 16 is connected to the main steam pipe 3. Structure 1
Three elastic wave detectors 9a, 9b,
9c are arranged respectively.
一般に主蒸気管３は複雑な形の構造物であり、弾性波の
伝播速度が一定とは限らず、またプラント内には主蒸気
管３に接続される他の構造物１６が配設されており、こ
の構造物１６を伝播した弾性波の方が主蒸気管３を伝播
する弾性波より速く弾性波検出器９ａ 、９ｂ 、９ｃ
に到達することが考えられる。また、弾性波検出器が２
個の場合には破断位置を一意的に決定できない場合があ
る。Generally, the main steam pipe 3 is a complex-shaped structure, the propagation speed of elastic waves is not always constant, and other structures 16 connected to the main steam pipe 3 are installed in the plant. Therefore, the elastic waves propagating through this structure 16 are faster than the elastic waves propagating through the main steam pipe 3 and are detected by the elastic wave detectors 9a, 9b, 9c.
It is possible to reach . In addition, there are two elastic wave detectors.
In this case, the fracture position may not be uniquely determined.
すなわち、第３図において構造物１６の弾性波の伝播速
度が主蒸気管３の伝播速度に比べ大きく、かつ接続点１
７の近傍の点Ｂで破断が起こった場合には、弾性波は構
造物１６を伝播し弾性波検出器９ａに到達する。従って
、接続点１７の近傍でかつ弾性波検出器９Ｃよりの位置
Ｂに破断が生じた場合には、弾性波を破断位置Ｂの同じ
側から検出することになり位置の推定が不可能となる。That is, in FIG. 3, the propagation speed of the elastic wave in the structure 16 is greater than that in the main steam pipe 3, and the connection point 1
When a break occurs at point B near point 7, the elastic wave propagates through the structure 16 and reaches the elastic wave detector 9a. Therefore, if a break occurs near the connection point 17 and at position B from the elastic wave detector 9C, the elastic wave will be detected from the same side as the break position B, making it impossible to estimate the position. .
そこで、この実施例では主蒸気管３に新たに弾性波検出
器９Ｃが配設されている。Therefore, in this embodiment, an elastic wave detector 9C is newly installed in the main steam pipe 3.
第４図はこの実施例における配管破断検出装置のブロッ
ク図を示すもので、このブロック図では、新たに追加さ
れた弾性波検出器９Ｃからの信号を処理する系統が追加
され、また記憶装置１８が追加されている。FIG. 4 shows a block diagram of the pipe rupture detection device in this embodiment. In this block diagram, a system for processing signals from the newly added elastic wave detector 9C is added, and a storage device 18 is added. has been added.
ここで記憶装置１８は予め詳細な解析または実際の測定
によってめられた破断位置と弾性波検出器９ａ 、９ｂ
、９ｃに弾性波が到達する時間の関係を記憶しており
、この記憶内容は必要に応じて破断位置推定装［１３に
出力される。Here, the storage device 18 stores the fracture position determined in advance through detailed analysis or actual measurement, and the elastic wave detectors 9a, 9b.
, 9c is stored, and this stored content is output to the fracture position estimating device [13] as necessary.
［発明の効果］
以上述べ１＝ように本発明の配管破断検出装置によれば
、配管の破断位置を迅速かつ確実に検出することができ
る。[Effects of the Invention] As described above, according to the pipe breakage detection device of the present invention, the breakage position of the pipe can be detected quickly and reliably.
第１図は本発明の一実施例の配管破断検出装置が適用さ
れる沸騰水形原子炉の配管系統図、第２図は本発明の一
実施例の配管破断検出装置のブロック図、第３図は本発
明の伯の実施例における弾性波検出器の取付は位置を示
す配管系統図、第４図は第３図に示す配管破断検出装置
のブロック図である。
３・・・・・・・・・・・・主蒸気管
９ａ 、９ｂ 、９ｃ・・・弾性波検出器−１１ａ、１
１ｂ、１１ｃ・・・フィルター１２ａ、１２ｂ、１２０
＝・＝タイマ
１３・・・・・・・・・・・・破断位置推定装置１５・
・・・・・・・・・・・警報表示Ｍ置１６・・・・・・
・・・・・・構造物
１８・・・・・・・・・・・・記憶装置代理人弁理士
須 山 佐 −
第１図
第２図
第３図
６
第４図FIG. 1 is a piping system diagram of a boiling water reactor to which a piping rupture detection device according to an embodiment of the present invention is applied, FIG. 2 is a block diagram of a piping rupture detection device according to an embodiment of the present invention, and FIG. The figure is a piping system diagram showing the mounting position of the elastic wave detector in the second embodiment of the present invention, and FIG. 4 is a block diagram of the piping breakage detection device shown in FIG. 3. 3... Main steam pipes 9a, 9b, 9c...Elastic wave detectors-11a, 1
1b, 11c...filters 12a, 12b, 120
=・=Timer 13・・・・・・・・・Break position estimation device 15・
・・・・・・・・・・・・Alarm display M position 16・・・・・・
・・・・・・Structure 18・・・・・・・・・Patent attorney representing storage device
Satoshi Suyama - Figure 1 Figure 2 Figure 3 Figure 6 Figure 4
Claims (1)
出装置において、前記ｌｄ管まノこ１よこれに接続され
る構造物上の異なる位置にｉｉ！設され前ｉａ ｉａ管
の破断により生じこの配管また（よ前区己構造物を伝播
する弾性波を検出する複数の弾性波検出器と、これらの
弾性波検出器がそれぞれ前８［！弾性波を検出した検出
時刻の時間差により前８己＾ｄ管の破断口の位置を推定
する破断位置推定装置と力＼らなることを特徴とする配
管破断検出装置。(1) In a pipe rupture detection device for detecting a rupture in a pipe through which fluid flows, ii! A plurality of elastic wave detectors are installed to detect the elastic waves propagating through the structure, which are caused by the rupture of the front ia ia pipe. What is claimed is: 1. A pipe rupture detection device comprising a rupture position estimating device and a rupture position estimating device for estimating the position of a rupture port in a pipe based on the time difference between the detection times at which the rupture is detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14224683A JPS6034600A (en) | 1983-08-03 | 1983-08-03 | Piping rupture detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14224683A JPS6034600A (en) | 1983-08-03 | 1983-08-03 | Piping rupture detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6034600A true JPS6034600A (en) | 1985-02-22 |
Family
ID=15310840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14224683A Pending JPS6034600A (en) | 1983-08-03 | 1983-08-03 | Piping rupture detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6034600A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998007610A1 (en) * | 1996-08-20 | 1998-02-26 | The Nippon Signal Co., Ltd. | Information generator using elastic wave |
-
1983
- 1983-08-03 JP JP14224683A patent/JPS6034600A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998007610A1 (en) * | 1996-08-20 | 1998-02-26 | The Nippon Signal Co., Ltd. | Information generator using elastic wave |
| US6031790A (en) * | 1996-08-20 | 2000-02-29 | The Nippon Signal Co. Ltd. | Information generator using elastic wave |
| US6292432B1 (en) * | 1996-08-20 | 2001-09-18 | The Nippon Signal Co., Ltd. | Information generating apparatus using elastic waves |
| US6459656B1 (en) | 1996-08-20 | 2002-10-01 | The Nippon Signal Co., Ltd. | Information generating apparatus using elastic waves |
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