JPH0441768B2 - - Google Patents
Info
- Publication number
- JPH0441768B2 JPH0441768B2 JP59047864A JP4786484A JPH0441768B2 JP H0441768 B2 JPH0441768 B2 JP H0441768B2 JP 59047864 A JP59047864 A JP 59047864A JP 4786484 A JP4786484 A JP 4786484A JP H0441768 B2 JPH0441768 B2 JP H0441768B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- sound wave
- gas cutoff
- leakage
- sonic
- 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 - Lifetime
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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic or ultrasonic vibrations
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pipeline Systems (AREA)
- Examining Or Testing Airtightness (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はボイラ、加熱炉その他の燃焼機器等に
於いて極めて重要な役割を担つている緊急遮断弁
や、その他の弁、ガス栓等のガス遮断機器の漏洩
検査方法に関するものである。[Detailed Description of the Invention] (Field of Industrial Application) The present invention is applicable to emergency shutoff valves, other valves, gas valves, etc. that play an extremely important role in boilers, heating furnaces, and other combustion equipment. This invention relates to a leakage inspection method for gas shutoff equipment.
（従来の技術）
ガス遮断機器の一つとして、例えば緊急遮断弁
（ESV）は燃焼機器に於いて極めて重要な役割を
担つており、特に異常時に於いて確実に燃料の供
給を停止することができないと、大事故につなが
る恐れがある。従つてかかる緊急遮断弁の保守に
は十分な配慮が必要で、できるだけ短いサイクル
で漏洩検査を行うことが望ましい。(Prior art) As a type of gas shutoff device, for example, an emergency shutoff valve (ESV) plays an extremely important role in combustion equipment, and is particularly important in ensuring that the fuel supply is stopped in the event of an abnormality. Failure to do so may lead to a serious accident. Therefore, sufficient consideration must be given to the maintenance of such emergency shutoff valves, and it is desirable to perform leakage tests in as short a cycle as possible.
ところで緊急遮断弁の従来の漏洩検査方法とし
ては、その上、下流側に差圧を与え、漏洩による
圧力降下または上昇を計測して、かかる漏洩の有
無を検査するものがある。 By the way, as a conventional leakage testing method for an emergency shutoff valve, there is a method in which a differential pressure is applied to the downstream side, and the pressure drop or rise due to the leakage is measured to check for the presence or absence of such leakage.
（発明が解決しようとする課題）
この漏洩検査方法では、漏洩による圧力変動
を検出するのに時間を要する、現場での操作が
必須で、遠隔での検査が困難である、自動化し
た場合には機構が複雑となり高価である、等々の
課題がある。(Problems to be Solved by the Invention) This leakage inspection method requires time to detect pressure fluctuations due to leakage, requires on-site operation, and is difficult to perform remote inspection. There are problems such as the mechanism is complicated and expensive.
このように従来の検査方法及び装置は簡便でな
いため、例えば高性能緊急遮断弁については月に
１回、それ以外については１〜２週間に１回程度
しか漏洩検査が行われていないのが現状である。 As conventional inspection methods and equipment are not simple, for example, leak inspections are only carried out once a month for high-performance emergency shutoff valves, and once every 1 to 2 weeks for other types of valves. It is.
本発明は以上の従来の課題を解決し、緊急遮断
弁等のガス遮断機器の漏洩検査を、簡素な構成
で、容易に、短時間で行えるようにすると共に、
自動化も容易とすることを目的とするものであ
る。 The present invention solves the above-mentioned conventional problems, and enables leakage inspection of gas shutoff devices such as emergency shutoff valves to be performed easily and in a short time with a simple configuration.
The purpose is to facilitate automation.
（課題を解決するための手段）
上述した課題を解決するための手段を説明する
と、本発明は緊急遮断弁等のガス遮断機器のガス
遮断部を隔てて、ガス流路内の上流側または下流
側の一方側に音波発信器を設けると共に、他方側
に音波受信器を設け、前記ガス遮断機器がガス遮
断状態に於いて前記音波発信器から音波を発信し
て、前記音波発信器に於ける受信音波の有無によ
り、前記ガス遮断部の漏洩の有無を検査すること
を要旨とするものである。(Means for Solving the Problems) To explain the means for solving the above-mentioned problems, the present invention provides a means for solving the problems described above. A sound wave transmitter is provided on one side of the side, and a sound wave receiver is provided on the other side, and when the gas cutoff device is in a gas cutoff state, the sound wave is emitted from the sound wave transmitter, and the sound wave is transmitted to the sound wave transmitter. The gist of this method is to check whether there is a leak in the gas cutoff section based on the presence or absence of received sound waves.
（作用）
ガス遮断機器がガス遮断状態に於いてガス遮断
部に漏洩が有ると、音波発信器から発せられた音
波は漏洩個所を介して伝わるので、この伝わつた
音波を音波受信器によつて検知することでガス遮
断部の漏洩を検知することができる。(Function) If there is a leak in the gas cut-off part when the gas cut-off device is in the gas cut-off state, the sound waves emitted from the sonic transmitter will be transmitted through the leakage point, so the transmitted sound waves will be collected by the sound wave receiver. By detecting this, it is possible to detect leakage from the gas cutoff section.
音波発信器及び音波受信器はガス遮断部を隔て
てガス流路内に設けているので、ガス流路の外側
の雑音による影響が少ない。 Since the sonic wave transmitter and the sonic wave receiver are provided within the gas flow path with a gas cutoff section in between, they are less affected by noise outside the gas flow path.
（実施例） 次に本発明の実施例を図について説明する。(Example) Next, embodiments of the present invention will be described with reference to the drawings.
符号１は緊急遮断弁等のガス遮断機器を示すも
ので、このガス遮断機器１のガス遮断部を隔て
て、ガス流路２内の上流側ａまたは下流側ｂの一
方側、（図に於いては上流側ａ）に音波発信器３
を設けると共に、他方側（図に於いては下流側
ｂ）に、音波受信器４を設けている。これら音波
発信器３、音波受信器４を設けるガス流路２は、
ガス遮断機器１の近傍の配管であつても良いし、
ガス遮断機器１自体のガス流路であつても良い。 Reference numeral 1 indicates a gas cutoff device such as an emergency cutoff valve, and the gas cutoff portion of the gas cutoff device 1 is separated from the gas flow path 2 on either the upstream side a or the downstream side b (in the figure). If so, there is a sound wave transmitter 3 on the upstream side a).
At the same time, a sonic wave receiver 4 is provided on the other side (downstream side b in the figure). The gas flow path 2 in which the sonic wave transmitter 3 and the sonic wave receiver 4 are provided is as follows:
It may be a pipe near the gas cutoff device 1, or
It may be the gas flow path of the gas cutoff device 1 itself.
以上の構成に於いて本発明は、ガス遮断機器１
がガス遮断状態の時に音波発信器３から音波を発
信し、この音波が音波受信器４に受信されるか否
かにより、ガス遮断部に於ける漏洩の有無を検査
するのである。 In the above configuration, the present invention provides a gas cutoff device 1.
When the gas is cut off, the sonic transmitter 3 emits a sound wave, and whether or not the sound wave is received by the sonic receiver 4 is used to check whether there is a leak in the gas cutoff section.
即ち、ガス遮断機器１がガス遮断状態に於いて
ガス遮断部に漏洩が有ると、音波発信器３から発
せられた音波は漏洩個所を介してガス遮断部を上
流側から下流側に伝わるので、この伝わつた音波
を音波受信器４によつて検知することで漏洩を検
知することができる。 That is, if there is a leak in the gas cutoff part when the gas cutoff device 1 is in the gas cutoff state, the sound waves emitted from the sound wave transmitter 3 will be transmitted from the upstream side to the downstream side of the gas cutoff part via the leakage point. Leakage can be detected by detecting the transmitted sound waves using the sound wave receiver 4.
第２図は音波周波数をパラメータとする、漏洩
量と受信音圧レベルの関係の一例を示すもので、
図中Ａ部は漏洩個所以外の経路を経て音波受信器
４に至る音波等の雑音に埋もれて漏洩個所を経た
音波が明確に識別し得ない部分、並びにＢ部は漏
洩個所を経た音波が明確に識別し得る部分を示す
ものである。この例では、音波周波数が500Hz〜
4kHzの場合には、約２×102c.c.／min前後の漏洩
量を越えた漏洩を検知可能で、また40kHzの場合
には、約３×103c.c.／minの漏洩量を越えた漏洩
を検知可能であることがわかる。かかる音波周波
数はガス遮断機器１や配管等の具体的構造、その
他の条件に応じて適宜に決定することができる。
また音波は単一周波数の連続波とする他、複数周
波数の連続波やコード化したパルス波等、適宜の
音波を適用することができる。更に、漏洩個所を
経て音波受信器４に至つた所望の音波を、他の雑
音から判別するために、例えば前述したように音
波としてコード化したパルス波を用いる方法等、
適宜の判別技術を適用することができる。 Figure 2 shows an example of the relationship between the amount of leakage and the received sound pressure level, using the sound wave frequency as a parameter.
In the figure, part A is the part where the sound waves that have passed through the leakage part are buried in noise such as sound waves that reach the sound wave receiver 4 via a route other than the leakage part, and the sound waves that have passed through the leakage part cannot be clearly identified, and part B is the part where the sound waves that have passed through the leakage part are clearly visible. This indicates the parts that can be identified. In this example, the sound wave frequency is 500Hz ~
At 4kHz, it is possible to detect leakage that exceeds a leakage rate of approximately 2 x 10 2 cc/min, and at 40kHz, it is possible to detect leakage that exceeds a leakage rate of approximately 3 x 10 3 cc/min. It turns out that it is detectable. Such a sound wave frequency can be appropriately determined depending on the specific structure of the gas cutoff device 1, piping, etc., and other conditions.
Further, in addition to using a continuous wave with a single frequency as the sound wave, any appropriate sound wave such as a continuous wave with multiple frequencies or a coded pulse wave can be used. Furthermore, in order to distinguish the desired sound waves that have reached the sound wave receiver 4 through the leakage point from other noises, for example, a method using a pulse wave coded as a sound wave as described above, etc.
Appropriate discrimination techniques can be applied.
本発明は手動操作によつて上述した検査を行う
他、例えば緊急遮断弁のように各種機器に組み込
まれて所定のシーケンスに於いて動作するような
場合には、かかる機器の運転シーケンスに於い
て、上記緊急遮断弁等を開とするに先立つて制御
回路５等により自動的に前記検査を行い、漏洩無
を確認したことを条件として以降のシーケンスに
移行するように構成すれば機器の安全性を向上す
ることができる。 In addition to carrying out the above-mentioned inspection by manual operation, the present invention can also be used to perform the above-mentioned inspection by manual operation.For example, when the device is incorporated into various devices and operates in a predetermined sequence, such as an emergency shutoff valve, The safety of the equipment can be improved if the above-mentioned inspection is automatically performed by the control circuit 5 or the like before opening the emergency shutoff valve, etc., and the subsequent sequence is proceeded on condition that no leakage is confirmed. can be improved.
（発明の効果）
本発明は以上の通り、緊急遮断弁等のガス遮断
機器がガス遮断状態に於いて、音波発信器から発
信した音波を音波受信器で受信するという、極め
て簡素な構成で、非常に容易に、そして短時間
に、漏洩の検査を行うことができ、従つて点検の
頻度を高くすることができるので、ガス遮断機器
を使用した各種機器の安全性を大幅に向上するこ
とができる。しかもこれら音波発信器と音波受信
器はガス流路内に設けているので、ガス流路の外
側の雑音に影響が受け難くい。(Effects of the Invention) As described above, the present invention has an extremely simple configuration in which a sound wave transmitted from a sound wave transmitter is received by a sound wave receiver when a gas cutoff device such as an emergency cutoff valve is in a gas cutoff state. Leakage inspection can be performed very easily and in a short time, and inspections can therefore be made more frequently, greatly improving the safety of various types of equipment that use gas shutoff equipment. can. Furthermore, since the sonic wave transmitter and the sonic wave receiver are provided within the gas flow path, they are less likely to be affected by noise outside the gas flow path.
第１図は本発明方法を適用した一例を示す構成
説明図、第２図は本発明方法の実施結果の一例を
示すグラフである。
符号１…ガス遮断機器、２…ガス流路、３…音
波発信器、４…音波受信器、５…制御回路、ａ…
上流側、ｂ…下流側。
FIG. 1 is a configuration explanatory diagram showing an example of applying the method of the present invention, and FIG. 2 is a graph showing an example of the results of implementing the method of the present invention. Code 1... Gas cutoff device, 2... Gas flow path, 3... Sonic transmitter, 4... Sonic receiver, 5... Control circuit, a...
Upstream side, b...downstream side.
Claims (1)
隔てて、ガス流路内の上流側または下流側の一方
側に音波発信器を設けると共に、他方側に音波受
信器を設け、前記ガス遮断機器がガス遮断状態に
於いて前記音波発信器から音波を発信して、前記
音波発信器に於ける受信音波の有無により、前記
ガス遮断部の漏洩の有無を検査することを特徴と
するガス遮断機器の漏洩検査方法。1. A sonic transmitter is provided on one side of the gas flow path on the upstream side or the downstream side across the gas cutoff part of a gas cutoff device such as an emergency cutoff valve, and a sonic wave receiver is provided on the other side, and the gas cutoff A gas cutoff characterized in that when the device is in a gas cutoff state, a sound wave is transmitted from the sound wave transmitter, and the presence or absence of a leak in the gas cutoff portion is inspected based on the presence or absence of a received sound wave in the sound wave transmitter. Equipment leak testing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4786484A JPS60192235A (en) | 1984-03-13 | 1984-03-13 | Method for inspecting leakage of gas circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4786484A JPS60192235A (en) | 1984-03-13 | 1984-03-13 | Method for inspecting leakage of gas circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60192235A JPS60192235A (en) | 1985-09-30 |
| JPH0441768B2 true JPH0441768B2 (en) | 1992-07-09 |
Family
ID=12787233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4786484A Granted JPS60192235A (en) | 1984-03-13 | 1984-03-13 | Method for inspecting leakage of gas circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60192235A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4821769A (en) * | 1986-11-12 | 1989-04-18 | Cd Medical Inc. | Valve monitor and method |
| US5115672A (en) * | 1991-02-11 | 1992-05-26 | Westinghouse Electric Corp. | System and method for valve monitoring using pipe-mounted ultrasonic transducers |
| CN109654384B (en) * | 2019-01-29 | 2024-04-02 | 南京工业大学 | Pipeline leakage detection device and detection method based on PSO-VMD algorithm |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50152322A (en) * | 1974-05-29 | 1975-12-08 | ||
| JPS52104985A (en) * | 1976-02-28 | 1977-09-02 | Shinzou Shioda | System for measuring leakage by supersonic waves |
-
1984
- 1984-03-13 JP JP4786484A patent/JPS60192235A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60192235A (en) | 1985-09-30 |
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