JP2820508B2 - Gas leak detection device - Google Patents
Gas leak detection deviceInfo
- Publication number
- JP2820508B2 JP2820508B2 JP17904290A JP17904290A JP2820508B2 JP 2820508 B2 JP2820508 B2 JP 2820508B2 JP 17904290 A JP17904290 A JP 17904290A JP 17904290 A JP17904290 A JP 17904290A JP 2820508 B2 JP2820508 B2 JP 2820508B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- valve
- pressure
- gas leak
- detection device
- 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
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Lift Valve (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Emergency Alarm Devices (AREA)
Description
【発明の詳細な説明】 「産業上の利用分野」 本発明は、圧力変化によりガス漏れを検知するガス漏
れ検知装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas leak detection device that detects gas leak based on a change in pressure.
「従来の技術およびその課題」 ガス漏れによる爆発事故等を未然に防ぐために、ガス
漏れ検知の要請は従来より高く、その一例として第３図
に示すようなガス漏れ検知装置および検知方式が採用さ
れていた。"Conventional technology and its problems" In order to prevent explosion accidents and the like due to gas leaks, the demand for gas leak detection is higher than before, and as an example, a gas leak detection device and detection method as shown in Fig. 3 have been adopted. I was
すなわち、ガス管路１に遮断弁３を設置し、当該遮断
弁３に圧力センサ５を設け、これら遮断弁３および圧力
センサ５の上流側に調整器７を設けたガス漏れ検知装置
を用いた検知方式である。That is, a gas leak detection device was used in which the shut-off valve 3 was installed in the gas pipeline 1, the pressure sensor 5 was provided on the shut-off valve 3, and the regulator 7 was provided upstream of the shut-off valve 3 and the pressure sensor 5. This is a detection method.
しかしながら、前記従来のガス漏れ検知方式では、ガ
スの圧力を監視する際、遮断弁より下流側の圧力が0mm
H2Oのとき、弁を開けたときに急峻な圧力変化を加わる
ので管路に共振減少が発生する。この共振現象は、管
長、管径、圧損抵抗等によって周波数と振幅、減衰時間
が変わる。However, in the conventional gas leak detection method, when monitoring the gas pressure, the pressure downstream of the shutoff valve is 0 mm
In the case of H 2 O, a sharp pressure change is applied when the valve is opened, so that a resonance decrease occurs in the pipeline. This resonance phenomenon varies in frequency, amplitude and decay time depending on the pipe length, pipe diameter, pressure loss resistance and the like.
立ち上げ時の圧力が共振現象によって、第４図中、PU
（圧力検知点）・DA（ガス漏れ許容点）間を往復するた
め、複圧力センサによって弁が開いたり閉じたりするの
で、そのまま制御に用いることができない。The pressure at the start-up is caused by the resonance phenomenon,
Since the valve reciprocates between (pressure detection point) and DA (permissible point of gas leakage), the valve is opened and closed by the double pressure sensor, so it cannot be used for control as it is.
また、圧力の共振現象がおさまってから制御に用いれ
ばよいが、数秒間の時間を損失するので、ユーザーの取
り扱い上不便を生じる。Further, the pressure may be used for control after the resonance phenomenon has subsided, but the time for several seconds is lost, which causes inconvenience in handling by the user.
本発明は、前記事情に鑑みてなされたものであって、
ガス圧力の共振現象を生じることなく、使い勝手のよい
ガス漏れ検知装置を提供することを目的としている。The present invention has been made in view of the above circumstances,
An object of the present invention is to provide an easy-to-use gas leak detection device without causing a gas pressure resonance phenomenon.
「課題を解決するための手段」 本発明のガス漏れ検知装置は、配管内のガスの圧力を
検知する検知手段と、配管内のガス流量を調節するガス
流量調節弁とを備え、前記ガス流量調節弁は、主流弁
と、前記主流弁よりも縮径された流通孔を有する補助弁
から構成されていることを特徴としている。"Means for solving the problem" The gas leak detection device of the present invention includes a detection means for detecting the pressure of the gas in the pipe, and a gas flow rate control valve for adjusting the gas flow rate in the pipe, The control valve is characterized by comprising a main flow valve and an auxiliary valve having a flow hole smaller in diameter than the main flow valve.
「作用」 本発明のガス漏れ検知装置は、ガス漏れを検査を行う
べき配管において、ガスの流量を調節する際、管径の小
さい補助弁を徐々に開閉することによってガス流量を調
節することとすれば、ガス圧力の急峻な変化を生じるこ
となく調節することができる。"Operation" The gas leak detection device of the present invention adjusts the gas flow rate by gradually opening and closing an auxiliary valve having a small pipe diameter when adjusting the gas flow rate in a pipe on which a gas leak is to be inspected. This makes it possible to adjust the gas pressure without causing a sharp change.
「実施例」 以下、本発明のガス漏れ検知装置の一実施例につい
て、図面を参照して説明する。Hereinafter, an embodiment of the gas leak detection device of the present invention will be described with reference to the drawings.
本実施例のガス漏れ検知装置10は、第１図に示すよう
に、配管内のガスの圧力を検知する検知手段（図示略）
と、配管内のガス流量を調節するガス流量調節弁12によ
って主要部が構成されている。As shown in FIG. 1, a gas leak detecting device 10 of the present embodiment is a detecting means (not shown) for detecting the pressure of gas in a pipe.
The main part is constituted by a gas flow control valve 12 that controls the gas flow in the pipe.
ガス流量調節弁12は、主流弁14と、この主流弁14より
も縮径された流通孔16aを有する補助弁16から構成され
ている。The gas flow control valve 12 includes a main flow valve 14 and an auxiliary valve 16 having a flow hole 16a smaller in diameter than the main flow valve 14.
主流弁14は、配管接続部17、17の間に設けられた仕切
板18と、前記一方の配管接続部17との開口部を開閉する
ための弁であって、仕切板18と配管接続部17を直接開閉
するメインシート19と、このメインシート19を作動する
ための作動機構20を備えた構成となっている。作動機構
20は、前記メインシート19を支持するシートホルダー22
と、このシートホルダー22に接続されたプランジャー23
と、このプランジャー23に付勢力を与えるスプリング24
と、プランジャー23を作動させるコイルマグネット25を
備えた構成となっている。The main flow valve 14 is a valve for opening and closing the partition plate 18 provided between the pipe connection portions 17 and 17, and the opening of the one pipe connection portion 17, and the partition plate 18 and the pipe connection portion. The main seat 19 directly opens and closes 17 and an operating mechanism 20 for operating the main seat 19 is provided. Actuation mechanism
20 is a seat holder 22 for supporting the main seat 19
And the plunger 23 connected to the seat holder 22
And a spring 24 that applies a biasing force to the plunger 23
And a coil magnet 25 for operating the plunger 23.
補助弁16は、前記一方の配管接続部17から流通孔16a
を経て、他方の配管接続部17へ流通するガスを制御する
ための弁であって、基本的な構成は、前記主流弁14と同
様の構成となっている。The auxiliary valve 16 is provided with a flow hole 16a from the one pipe connection portion 17.
This is a valve for controlling the gas flowing to the other pipe connection part 17 through the other. The basic configuration is the same as that of the mainstream valve 14.
次に、本実施例のガス漏れ検知装置10を使用する場合
について、第２図を参照して説明する。Next, a case where the gas leak detection device 10 of the present embodiment is used will be described with reference to FIG.
まず、管路にガス充填を行う場合は、補助弁16を開状
態から徐々に閉状態とする（図中、符号）。First, when gas is filled in the pipeline, the auxiliary valve 16 is gradually closed from the open state (reference numeral in the figure).
そして、管路内の圧力がPU点（圧力検知点）に達した
ら補助弁16の流通孔16aを閉状態のまま気密試験をｘ秒
間行なう（図中、符号）。Then, when the pressure in the pipeline reaches the PU point (pressure detection point), an airtight test is performed for x seconds while the communication hole 16a of the auxiliary valve 16 is kept closed (symbol in the figure).
ｘ秒間気密試験を行なった後、ガス漏れがなく、また
は許容範囲であれば異常なしとして主流弁14を開状態と
してガスの流通を再開する（図中、符号）。After performing the airtightness test for x seconds, if there is no gas leakage or if there is no abnormality, the main flow valve 14 is opened and the flow of gas is restarted if there is no abnormality (symbol in the figure).
以上説明したように、本発明のガス漏れ検知装置10を
使用すれば、管路にガス充填を行う場合、補助弁16を峻
度の緩やかな圧力変化となるような補助弁16を用いるこ
とによって、管路の圧力の圧力変化は急峻な変化を示さ
ず、徐々に変化し、過渡現象による共振は発生しなくな
る。これにより、複圧力センサによるPU点検知遮断が可
能となる。As described above, when the gas leak detection device 10 of the present invention is used, when gas is filled in a pipeline, by using the auxiliary valve 16 such that the pressure change of the auxiliary valve 16 has a gradual pressure change. However, the pressure change of the pressure in the pipeline does not show a steep change, but changes gradually, and resonance due to a transient phenomenon does not occur. This makes it possible to cut off the detection of the PU point by the double pressure sensor.
したがって、本発明のガス漏れ検知装置10によれば、
特に、安定したガス圧力変化を示し、複圧力センサ方式
の特徴を生かすといった優れた効果を奏することができ
る。Therefore, according to the gas leak detection device 10 of the present invention,
In particular, an excellent effect of exhibiting a stable gas pressure change and making use of the features of the double pressure sensor system can be obtained.
「発明の効果」 本発明のガス漏れ検知装置は、配管内のガスの圧力を
検知する検知手段と、配管内のガス流量を調節するガス
流量調節弁とを備えたガス漏れ検知装置であって、前記
ガス流量調節弁は、主流弁と、前記主流弁よりも縮経さ
れた流通孔を有する補助弁から構成されている構成とし
たので、管路にガス充填を行う場合、補助弁を峻度の緩
やかな圧力変化となるような補助弁を用いることによっ
て、管路の圧力の圧力変化は急峻な変化を示さず、徐々
に変化し、過渡現象による共振は発生しなくなる。これ
により、複圧力センサによるPU点（圧力検知点）検知遮
断が可能となる。[Effects of the Invention] A gas leak detection device of the present invention is a gas leak detection device including detection means for detecting the pressure of gas in a pipe, and a gas flow rate control valve for adjusting a gas flow rate in the pipe. The gas flow control valve has a configuration including a main flow valve and an auxiliary valve having a flow hole which is smaller than the main flow valve. By using an auxiliary valve having a gradual pressure change, the pressure change of the pipeline pressure does not show a steep change, but changes gradually, and resonance due to a transient phenomenon does not occur. This makes it possible to cut off the detection of the PU point (pressure detection point) by the multiple pressure sensor.
そして、特に、安定したガス圧力変化を示し、複圧力
センサ方式の特徴を生かすといった優れた効果を奏する
ことができる。In particular, it is possible to exhibit an excellent effect of showing a stable gas pressure change and making use of the features of the double pressure sensor system.
第１図は本発明のガス漏れ検知装置の一実施例を示す
図、第２図は本発明のガス漏れ検知装置を使用した場合
の圧力変化を示すデータ図、第３図はガス漏れ検知装置
の一従来例を示す図、第４図は従来のガス漏れ検知装置
を使用した場合の圧力変化を示すデータ図である。 10……ガス漏れ検知装置、 12……ガス流量調節弁、 14……主流弁、 16……補助弁。FIG. 1 is a view showing one embodiment of a gas leak detecting device of the present invention, FIG. 2 is a data diagram showing a pressure change when the gas leak detecting device of the present invention is used, and FIG. 3 is a gas leak detecting device. FIG. 4 is a data diagram showing a pressure change when a conventional gas leak detection device is used. 10… Gas leak detector, 12… Gas flow control valve, 14… Main flow valve, 16… Auxiliary valve.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) F16K 1/52 F16K 37/00 G08B 21/00 G01N 27/04──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) F16K 1/52 F16K 37/00 G08B 21/00 G01N 27/04
Claims (1)
と、配管内のガス流量を調節するガス流量調節弁とを備
えたガス漏れ検知装置であって、前記ガス流量調節弁
は、主流弁と、前記主流弁よりも縮径された流通孔を有
する補助弁から構成されていることを特徴とするガス漏
れ検知装置。1. A gas leak detecting device comprising: detecting means for detecting the pressure of gas in a pipe; and a gas flow control valve for adjusting a gas flow in the pipe, wherein the gas flow control valve is a main flow control valve. A gas leak detection device comprising: a valve; and an auxiliary valve having a flow hole smaller in diameter than the main flow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17904290A JP2820508B2 (en) | 1990-07-06 | 1990-07-06 | Gas leak detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17904290A JP2820508B2 (en) | 1990-07-06 | 1990-07-06 | Gas leak detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0469465A JPH0469465A (en) | 1992-03-04 |
| JP2820508B2 true JP2820508B2 (en) | 1998-11-05 |
Family
ID=16059106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17904290A Expired - Lifetime JP2820508B2 (en) | 1990-07-06 | 1990-07-06 | Gas leak detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2820508B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI554630B (en) | 2010-07-02 | 2016-10-21 | 應用材料股份有限公司 | Deposition apparatus and methods to reduce deposition asymmetry |
| FR3000215B1 (en) * | 2012-12-21 | 2016-02-05 | Aneolia | DEVICE AND METHOD FOR TESTING A SAMPLE, ESPECIALLY DISCRIMINATION OF A GAS FROM A SAMPLE |
-
1990
- 1990-07-06 JP JP17904290A patent/JP2820508B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0469465A (en) | 1992-03-04 |
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