JPS60187840A - Leakage detection apparatus - Google Patents
Leakage detection apparatusInfo
- Publication number
- JPS60187840A JPS60187840A JP4315484A JP4315484A JPS60187840A JP S60187840 A JPS60187840 A JP S60187840A JP 4315484 A JP4315484 A JP 4315484A JP 4315484 A JP4315484 A JP 4315484A JP S60187840 A JPS60187840 A JP S60187840A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- leakage
- multiplexer
- pair
- light
- 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
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
- G01M3/38—Investigating fluid-tightness of structures by using light
-
- 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
- G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
- G01M3/047—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means with photo-electrical detection means, e.g. using optical fibres
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、例えば、原子力発電プラントにおける建屋内
に配管された各種の管路から通路や床面における液体の
漏洩及びその発生位置を検出する漏洩検出装置に関する
。Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a method for detecting leakage of liquid from various pipes installed in a building in a nuclear power plant in a passageway or a floor surface, and the location where the leakage occurs. This invention relates to a detection device.
一般に、原子力発電所や各種の化学プラントでは、各種
の液体を移送するために、整しい数の大小の配管や液体
タンクが建屋の内・外に設置されている。そして、これ
らの配管や液体タンクにおいて、これらが例等かの原因
により、漏洩事故が発生したとき、漏洩液体は、配管及
び液体タンクの壁面又は、建屋の壁面を伝って、多くの
場合、建屋等の床面に蓄積して′貯溜される。Generally, in nuclear power plants and various chemical plants, a regular number of large and small pipes and liquid tanks are installed inside and outside the building in order to transfer various liquids. When a leakage accident occurs in these piping or liquid tanks due to these reasons, the leaked liquid will travel along the walls of the piping and liquid tank or the walls of the building, and in many cases, the leaked liquid will leak into the building. Accumulates and accumulates on the floor surfaces of buildings, etc.
従って、この床面にある漏洩液量が一定量以上に達した
とき、これを検出し、漏洩事故の発生を監視員に通報し
、配管、液体タンクの保修や漏洩液の回収等の処理を迅
速Ｋ、しかも、確実に施す必要がある。Therefore, when the amount of leaked liquid on the floor reaches a certain amount or more, this is detected, the occurrence of a leakage accident is reported to the supervisor, and measures such as maintenance of the piping and liquid tank and recovery of the leaked liquid are carried out. It is necessary to apply K quickly and reliably.
そこで、従来の液体漏洩検出装置は、床面に、例えば、
多数の電極体を埋設し、この各電極体が漏洩液体を検出
して警報を発するようになっている。Therefore, conventional liquid leakage detection devices are installed on the floor, for example.
A large number of electrode bodies are buried, and each electrode body detects leaking liquid and issues an alarm.
しかしながら、上述した電極体による漏洩検出装置は、
漏洩箇所（漏洩位置）を正確に検出できないばかりでな
く、掃除の際、不用意に水を散布すると、誤動作するお
それもあり、しかも、検出精度の向上を図るために、原
則として１台の検出装置についてコ芯ケーブルによる７
本の信号線を必要とするため、床面における検出箇所が
増加するのに従い、膨大な量のケーブルを要し、これに
起因して、多芯ケーブルを使用するため、多（の床面に
添設することを余儀なくされ、床面通路の場所的な制限
を受けるおそれがある。However, the leakage detection device using the electrode body described above is
Not only is it not possible to accurately detect the leakage point (leakage position), but there is a risk of malfunction if water is carelessly sprayed during cleaning. About the device 7 with core cable
As the number of detection points on the floor increases, an enormous amount of cables are required. This may result in restrictions on the floor passage space.
本発明は、上述した事情に鑑みてなされたものであって
、多数の光学的漏洩検出器を使用しても使用される信号
線の使用本数を少（なくすると共に、上記各光学的漏洩
検出器の構成を簡素化して、検出誤差や誤認を解消して
、漏洩発生位置を正確に、しかも、直ちに検出するよう
にしたことを目的とする漏洩検出装置を提供するもので
ある。The present invention has been made in view of the above-mentioned circumstances, and it reduces (eliminates) the number of signal lines used even when a large number of optical leakage detectors are used, and also enables each of the optical leakage detection methods described above. The purpose of the present invention is to provide a leakage detection device which has a simple configuration, eliminates detection errors and misidentifications, and accurately and immediately detects the location of leakage occurrence.
本発明は、広い周波数帯域を有する光発信器の光ケーブ
ル光路上に各一対をなす分波器及び合波器を列設し、さ
らに、この最終合波器に受光器及び警報器を備えた演算
器を順に設け、上記各一対をなす分波器及び合波器に各
光学的漏洩検出器を各信号線で接続して構成したもので
ある。The present invention provides a calculation system in which a pair of demultiplexers and a multiplexer are arranged on the optical path of an optical cable of an optical transmitter having a wide frequency band, and the final multiplexer is equipped with a light receiver and an alarm. The optical leakage detectors are connected to each pair of demultiplexer and multiplexer by respective signal lines.
以下、本発明を図示の一実施例について説明する。 Hereinafter, the present invention will be described with reference to an illustrated embodiment.
第１図乃至第３図において、符号ｌは、波長λ１．λ１
．λ３・・・λｎの光の広い周波数帯域を有する光発信
器であって、この光発信器／の光路上には、例えば、光
ファイバーを束ねた光ケーブルコが設けられており、こ
の光ケーブルツの光路上には、各一対をなす第１．第コ
、・・・第１分光器３ａ。In FIGS. 1 to 3, the symbol l represents the wavelength λ1. λ1
．． It is an optical transmitter having a wide frequency band of light of λ3...λn, and on the optical path of this optical transmitter, for example, an optical cable that bundles optical fibers is provided, and the optical cable of this optical cable is On the road, each pair of first. No. 1...first spectrometer 3a.
３ｂ・・・３ｎ及び第１．第コ、・・・第ｎ合波器＋ａ
。3b...3n and 1st. No. 1, ... n-th multiplexer +a
.
ｐｂ・・・グｎが一直線上一列設されている。又、上記
最終合波器（第ｎ合波器）ダｎには受光器Ｓが設けられ
ており、この受光器５には、警報器６を備えた演算器７
が電気信号による信号線ｇを介して接続されている。さ
らに、上記各一対をなす第７、第２．・・・第ｎ分光器
、？ａ、３ｂ、・・・３ｎ及び第１．第２．・・・第ｎ
合波器ｌＩａ、４’ｂ・・・グｎには、例えばプリズム
による各第１．第２．・・・第ｎ光学的漏洩検出器９ａ
、９ｂ・・・９ｎが各一対の信号線１０ａ、１０ｂ、／
／ａ、／／ｂ、／Ｊａ、／２ｂで接続されている。pb...guns are arranged in one row in a straight line. Further, the final multiplexer (n-th multiplexer) dan n is provided with a light receiver S, and this light receiver 5 includes an arithmetic unit 7 equipped with an alarm 6.
are connected via a signal line g using an electric signal. Furthermore, the seventh, second . ...Nth spectrometer,? a, 3b, ... 3n and the first. Second. ...nth
The multiplexers lIa, 4'b, . . . , 4'b, . Second. ...nth optical leakage detector 9a
, 9b...9n are connected to each pair of signal lines 10a, 10b, /
They are connected by /a, //b, /Ja, and /2b.
従って、上記光発信器／による広い周波数帯域の白色光
は、光ケーブルコを通して、上記第１分光器３ａにより
、一定の波長λ１の光を取出して、これを上記信号線１
０ａを通して上記第１光学的漏洩検出器ｑａに導びかれ
、他方、上記第１分光器３ａを通過した他の波長λ２．
λ、・・・λｎ は、第１合波器４Ｌａへ導びかれる。Therefore, the white light in a wide frequency band from the optical transmitter passes through the optical cable, and the first spectrometer 3a extracts light with a certain wavelength λ1, which is transmitted to the signal line 1.
0a to the first optical leakage detector qa, while another wavelength λ2.0a passed through the first spectrometer 3a.
λ,...λn are guided to the first multiplexer 4La.
一方、上記第１光学的漏洩検出器９ａに導びかれた波長
λ、の光は、第２図に示されるように、床面１３上に漏
洩した液体／４’がなければ、上記第１光学的漏洩検出
器ｑａによるプリズム内を全反射して、他の信号線１０
ｂに導びかれながら、上記第１合波器ｌＩａに戻って上
記他の波長λ２．λ３・・・λｎに合流して、次の第一
分光器３ｂへ導びかれる。On the other hand, as shown in FIG. It is totally reflected inside the prism by the optical leakage detector qa, and the other signal line 10
b, returns to the first multiplexer lIa and receives the other wavelength λ2. It joins λ3...λn and is guided to the next first spectrometer 3b.
他方、上記第１光学的漏洩検出器ｑａに導びかれた波長
λ、の光が、第３図に示されるように、床面１３上に漏
洩した液体／４’が第１光学的漏洩検出器ｑａによるプ
リズムを浸漬しているとき、この浸漬しているプリズム
より液体中に洩光し、波長λ１ による光の出力が減衰
し、他の信号線１０ｂに導びかれながら、上記第１合波
器４Ｚａに戻って来るけれども、波長λ１による光の出
力が極度に減衰すると、第１合波器＋ａに戻る光量は極
めて小さくなる。As shown in FIG. When the prism of the device qa is immersed, light leaks from the immersed prism into the liquid, and the output of the light with the wavelength λ1 is attenuated, and while being guided to the other signal line 10b, the first group Although the light returns to the wavelength multiplexer 4Za, if the output of the light with the wavelength λ1 is extremely attenuated, the amount of light that returns to the first multiplexer +a becomes extremely small.
又一方、上記光発信器／による白色光は、光ケーブルλ
、及び一対の第１分光器３ａ、第１合波器４Ｌａを通過
して、次の波長λ、のみを分光する第２分光器３ｂ及び
第１合波器４Ｌａに導びかれると共に、上記第２光学的
漏洩検出器９ｂによるプリズム内を全反射して上記第２
合波器＋ｂに戻って上記他の波長、λ１．λ、・・・λ
ｎ に合流して、次の第ｎ分光器３ｎへ導びかれる。On the other hand, the white light from the optical transmitter/
, and a pair of first spectrometer 3a and first multiplexer 4La, and is guided to second spectrometer 3b and first multiplexer 4La that spectrally separates only the next wavelength λ. 2. The second optical leakage detector 9b completely reflects the inside of the prism.
Returning to the multiplexer +b, the other wavelengths, λ1. λ,...λ
n and is guided to the next n-th spectrometer 3n.
このようにして、上記光発信器／による広い周波数帯域
の白色光は、上記床面／３上に設置された第１．第コ・
・・第ｎ光学的漏洩検出器９ａ、９ｂ・・・ｑｎを通し
て、各波長λ１．λ２．λ、・・・λｎ による波光を
検出し、これらの検出した光は、上記受光器左に受光さ
れて光電変換され、さらに、警報器乙な備えた演算器ク
ヘ入力される。In this way, the white light in a wide frequency band from the optical transmitter / is transmitted to the first light source installed on the floor /3. No.
... through the n-th optical leakage detectors 9a, 9b...qn, each wavelength λ1... λ2. Wave light due to λ, .
しかし、て、この演算器７は、波長λ１．λ７．λ３・
・・λｎをスキャンさせ、これにより、予め設定された
一定の設定値より低い値となる周波数λＸを検出すると
、これによって、漏洩した床面／３の検出位置を迅速に
、しかも、正確に警報器の表示板に表示するようになっ
ている。However, this arithmetic unit 7 has a wavelength λ1. λ7. λ3・
...By scanning λn, if a frequency λX with a value lower than a certain preset value is detected, this will quickly and accurately alert the detection position of the leaked floor/3. It is displayed on the display board of the device.
特に、本発明による上記第１光学的漏洩検出器９Ｂへ導
入された波長λ、の光は、上記プリズムで反射して第７
合波器ｌＩ！Ｌｌ＼戻るけれども、このプリズムの反射
面が漏洩した液体で浸漬されていると、上記波長λ、の
光は、第３図に示されるように、液体中に波光して著し
く消滅するから、上記第〆合波器＋ａへ戻る光量はきわ
めて小さくなる。これらの現象は、他の光学的漏洩検出
器９ｂ・・・９ｎでも同じようにゾよるから、床面／３
の漏洩液体の位置を上記各波長λ１．λ２．λ３・・・
λｎの波光から検出し得るようになっている。In particular, the light having a wavelength λ introduced into the first optical leakage detector 9B according to the present invention is reflected by the prism and is reflected by the seventh optical leakage detector 9B.
Multiplexer II! L\＼Returning to this, if the reflective surface of this prism is immersed in leaked liquid, the light with the above-mentioned wavelength λ will wave into the liquid and disappear significantly, as shown in Figure 3, so the above-mentioned The amount of light returning to the final multiplexer +a becomes extremely small. These phenomena also occur in the other optical leakage detectors 9b...9n, so the floor surface/3
The position of the leaked liquid at each wavelength λ1. λ2. λ3...
It can be detected from light waves of λn.
以上述べたように本発明によれば、広い周波数帯域を有
する光発信器／の光ケーブルコの光路上に各一対をなす
分波器Ｊａ、ｊ’ｂ・・・３ｎ及び合波器１ａ、’Ｉｂ
・・・’Ｉｎを列設し、さらに、この最終合波器＋ｎに
受光器Ｓ及び警報器６を備えた演算器７を順に設け、上
記各一対をなす分波器Ｊａ。As described above, according to the present invention, a pair of demultiplexers Ja, j'b...3n and a multiplexer 1a,' are provided on the optical path of an optical cable of an optical transmitter/optical cable having a wide frequency band. Ib
.
３ｂ・・・３ｎ及び合波器１１．ａ、ｑｂ・・・＋ｎに
各光学的漏洩検出器ｑａ、ｑｂ・・・９ｎを各信号線１
０ａ。3b...3n and multiplexer 11. Connect each optical leakage detector qa, qb...9n to each signal line 1 to a, qb...+n.
0a.
１０ ｂ 、 ／／ ａ 、 ／／ ｂ 、 ／、２
ａ 、 ／、２ ｂで接続しであるので、床面／３等の
漏洩している位置を正確に検出することができるばかり
でなく、漏洩検出眞おける設定位置の変更が自由にでき
ると共に、各信号線や各光学的漏洩検出器９ａ、ｑｂ、
・・・９ｎ全体を小型軽量化することができる。10 b, // a, // b, /, 2
Since they are connected at a, /, and 2 b, not only can the leaking position on the floor /3 etc. be detected accurately, but also the setting position of the leak detection position can be changed freely. Each signal line and each optical leakage detector 9a, qb,
...The entire 9n can be made smaller and lighter.
第１図は、本発明による漏洩検出装置の線図、第２図及
び第３図は、本発明の詳細な説明するための各図である
。
／・・・光発信器、ツ・・・光ケーブル、ｔ７ａ、Ｊｂ
・・・Ｊｎ・・・分波器、グａ、ダｂ・・・グｎ・・・
分波器、Ｓ・・・受光器、６・・・警報器、７・・・演
算器、９ｇ、９ｂ・・・９ ｎ−−−光学的漏洩検出器
、１０ａ、１０ｂ、／／ａ、／／ｂ。
／２ａ、／Ｊｂ・・・信号線。
出願人代理人 猪 股 清
＋ｌ函
）２目 乎３凹FIG. 1 is a diagram of a leak detection device according to the present invention, and FIGS. 2 and 3 are diagrams for explaining the present invention in detail. /...Optical transmitter, Tsu...Optical cable, t7a, Jb
...Jn...brancher, gu a, da b... gn...
Demultiplexer, S... Light receiver, 6... Alarm, 7... Arithmetic unit, 9g, 9b... 9 n---Optical leak detector, 10a, 10b, //a, //b. /2a, /Jb...Signal line. Applicant's agent Kiyoshi Inomata + l box) 2 eyes 乎 3 concave
Claims (1)
上に各一対をなす分波器及び合波器を列設し、さらに、
この最終合波器に受光器及び警報器を備えた演算器を順
に設け、上記各一対をなす分波器及び合波器に各光学的
漏洩検出器を各信号線で接続したことを特徴とする漏洩
検出装置。 ユ信号線を光ファイバーとしたことを特徴とする特許請
求の範囲第１項記載の漏洩検出装置。 ３、光学的漏洩検出器をプリズムで構成したことを特徴
とする特許請求の範囲第１項又は第２項記載の漏洩検出
装置。[Claims] l A pair of demultiplexers and a multiplexer are arranged on the optical path of an optical cable of an optical oscillator having a wide frequency band, and further,
The final multiplexer is provided with arithmetic units equipped with a light receiver and an alarm in sequence, and each optical leakage detector is connected to each pair of demultiplexer and multiplexer by each signal line. leak detection device. 2. The leakage detection device according to claim 1, wherein the signal line is an optical fiber. 3. The leakage detection device according to claim 1 or 2, wherein the optical leakage detector is constituted by a prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4315484A JPS60187840A (en) | 1984-03-07 | 1984-03-07 | Leakage detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4315484A JPS60187840A (en) | 1984-03-07 | 1984-03-07 | Leakage detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60187840A true JPS60187840A (en) | 1985-09-25 |
Family
ID=12655930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4315484A Pending JPS60187840A (en) | 1984-03-07 | 1984-03-07 | Leakage detection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60187840A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6317434U (en) * | 1986-07-15 | 1988-02-05 | ||
| JP2012184947A (en) * | 2011-03-03 | 2012-09-27 | Occ Corp | Water gage system |
-
1984
- 1984-03-07 JP JP4315484A patent/JPS60187840A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6317434U (en) * | 1986-07-15 | 1988-02-05 | ||
| JP2012184947A (en) * | 2011-03-03 | 2012-09-27 | Occ Corp | Water gage system |
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