JP2001004479A - Leakage detecting method of inner tube of multiplex tube for gas and device therefor - Google Patents
Leakage detecting method of inner tube of multiplex tube for gas and device thereforInfo
- Publication number
- JP2001004479A JP2001004479A JP11171002A JP17100299A JP2001004479A JP 2001004479 A JP2001004479 A JP 2001004479A JP 11171002 A JP11171002 A JP 11171002A JP 17100299 A JP17100299 A JP 17100299A JP 2001004479 A JP2001004479 A JP 2001004479A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- pipe
- leak
- intermediate portion
- helium
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
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- Examining Or Testing Airtightness (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、核融合炉などの多
重真空配管の内側配管における真空洩れの箇所を探知す
る技術及び装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique and an apparatus for detecting a location of a vacuum leak in an inner pipe of a multiple vacuum pipe such as a nuclear fusion reactor.
【０００２】[0002]
【従来の技術】核融合炉などの真空配管において、トリ
チウム等の放射性ガスを含む気体が流れる真空配管は２
重配管あるいはそれ以上の多重配管にし、万が一内側配
管に真空洩れがあっても外側配管内を差動排気して放射
性ガスが環境に放出されるのを防いでいる。2. Description of the Related Art In a vacuum pipe of a nuclear fusion reactor or the like, a vacuum pipe through which a gas containing a radioactive gas such as tritium flows is used.
A heavy pipe or multiple pipes are used, and even if there is a vacuum leak in the inner pipe, the outer pipe is differentially evacuated to prevent radioactive gas from being released into the environment.
【０００３】従来、この長尺の多重真空配管の内管の真
空洩れの箇所を探知するには内部真空法か内部加圧法を
用いていた。内部真空法においては図１に示すように、
内管２か中間部１のどちらか一方をヘリウム洩れ検知器
（ヘリウムリークデイテクター９）を使って真空排気し
ながら他方の内管か中間部にヘリウム吹付け用ノズル４
を入れ、洩れが疑われる箇所３にヘリウムを吹付け、洩
れ出たヘリウム５をヘリウムリークディテクターで検出
する方法がとられる。この場合多重真空配管の内径が小
さい場合には、配管内のヘリウム吹き付けノズルを遠隔
操作にて移動させなければならない。Conventionally, an internal vacuum method or an internal pressurization method has been used to detect the location of a vacuum leak in the inner pipe of this long multiple vacuum pipe. In the internal vacuum method, as shown in FIG.
While evacuating either the inner tube 2 or the intermediate portion 1 using a helium leak detector (helium leak detector 9), a helium spray nozzle 4 is applied to the other inner tube or the intermediate portion.
Then, helium is sprayed on the portion 3 where leakage is suspected, and the leaked helium 5 is detected by a helium leak detector. In this case, when the inner diameter of the multiplex vacuum pipe is small, the helium spray nozzle in the pipe must be moved by remote control.
【０００４】また、内部加圧法においては図２に示すよ
うに、内管２か中間部１のどちらか一方を１気圧以上の
ヘリウムで加圧し、他方の内管か中間部は１気圧以下の
空気で満たし、低圧側の内管か中間部にヘリウム補集用
プローブ（ヘリウムスニファープローブ１０）を入れ、
洩れ出たヘリウムをスニファープローブに取り付けたヘ
リウムリークディテクター９で検出する方法がとられ
る。In the internal pressurization method, as shown in FIG. 2, one of the inner tube 2 and the intermediate portion 1 is pressurized with helium of 1 atm or more, and the other inner tube or the intermediate portion is pressurized at 1 atm or less. Fill with air, put a helium collection probe (helium sniffer probe 10) in the inner tube or middle part on the low pressure side,
The leaked helium is detected by a helium leak detector 9 attached to a sniffer probe.
【０００５】しかしながら内部真空法や内部加圧法で
は、ヘリウム吹き付け用ノズルやヘリウムスニファープ
ローブを遠隔操作で機械的に移動させなければならず、
取り扱いが煩雑であった。また、これらのノズルやプロ
ーブは検出位置分解能を上げるため、通常ｌｃｍ／秒程
度のゆっくりとした速度で移動させるので、内管の表面
全体を移動させるのには多大な時間が必要とされてい
た。However, in the internal vacuum method and the internal pressurization method, the helium spray nozzle and the helium sniffer probe must be mechanically moved by remote control.
Handling was complicated. In addition, since these nozzles and probes are usually moved at a slow speed of about 1 cm / sec in order to increase the detection position resolution, it takes a lot of time to move the entire surface of the inner tube. .
【０００６】さらに内部真空法では配管内を高真空に排
気しなければならず、被排気ガスは分子流であるためヘ
リウムリークディテクターの排気速度の制限や配管のコ
ンダクタンスの制限等からヘリウムリークディテクター
の応答時間が大きくなって洩れ箇所の特定が困難となっ
てしまう問題もあった。Further, in the internal vacuum method, the inside of the pipe must be evacuated to a high vacuum. Since the gas to be exhausted is a molecular flow, the exhaust speed of the helium leak detector is limited, and the conductance of the pipe is limited. There is also a problem that the response time becomes longer and it becomes difficult to identify the leaked part.
【０００７】[0007]
【発明が解決しようとする課題】本発明は従来、多重管
の内側配管の漏洩探知のために必要とされていた、上記
ヘリウム吹き付けノズルやヘリウムスニファーブローブ
を管の表面に沿って移動させる操作が不要で、かつ、迅
速な洩れ探知を行うためになされたものであり、内側配
管の漏洩探知に要する時間やコストを大幅に低減するも
のである。SUMMARY OF THE INVENTION In the present invention, the operation of moving the helium spray nozzle and the helium sniffer probe along the surface of the pipe, which has been conventionally required for detecting leaks in the inner pipe of the multi-pipe, is described. The purpose of the present invention is to perform unnecessary and quick leak detection, and to greatly reduce the time and cost required for leak detection of the inner piping.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
に本発明では、中間部と内管にそれぞれ独立に搬送ガス
として粘性流窒素ガスあるいは空気を流し、かつ、中間
部のみに漏洩検査用ガスとしてヘリウムを間欠的に混入
し、内管の漏洩箇所を通して内管に流入するヘリウムを
ヘリウムリークディテクターで検出し、洩れの位置をヘ
リウム混入開始からヘリウムが検出されるまでの時間遅
れによって特定する。In order to solve the above-mentioned problems, according to the present invention, a viscous nitrogen gas or air is supplied as a carrier gas to an intermediate portion and an inner pipe independently of each other, and a leak test is performed only in the intermediate portion. Helium is intermittently mixed as a gas, helium flowing into the inner tube through the leak point of the inner tube is detected by a helium leak detector, and the position of the leak is specified by a time delay from the start of helium mixing to the detection of helium. .
【０００９】[0009]
【発明の実施の形態】本発明では図３のように漏洩検査
用ガスにヘリウム１４、搬送ガスに窒素ガス１２および
１３を用い、粘性流の窒素ガス１５および１７を内管２
と中間部１にそれぞれ独立に流し、他端を真空ポンプ８
で排気する。そして、中間部の粘性流窒素ガス１５及び
１７にヘリウム１６を間欠的に混入させると、ヘリウム
は粘性流窒素ガスに挟まれ窒素ガスとほぼ同じ流速で中
間部内を移動する。なお、ヘリウムの窒素ガス内拡散速
度は、粘性流窒素ガスの流速よりも十分小さくなるよう
にヘリウムと窒素ガスの流量、および真空ポンプの排気
速度を調節する。このような状態で中間部１の粘性流窒
素ガスの平均圧力が内管２の粘性流窒素ガスの平均圧力
よりも高くなるように設定すれば、内管の洩れの箇所を
通して内管側にヘリウムが流入し、そのヘリウムを内管
の真空ポンプに取り付けたヘリウムリークディテクター
９で検出する。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, as shown in FIG. 3, helium 14 is used as a gas for leak inspection, nitrogen gases 12 and 13 are used as carrier gases, and nitrogen gases 15 and 17 of viscous flow are supplied to an inner pipe 2.
And the intermediate section 1 independently, and the other end is a vacuum pump 8
Exhaust with. When helium 16 is intermittently mixed into the viscous flow nitrogen gas 15 and 17 in the intermediate portion, the helium is sandwiched between the viscous flow nitrogen gas and moves in the intermediate portion at substantially the same flow rate as the nitrogen gas. The flow rates of the helium and the nitrogen gas and the exhaust speed of the vacuum pump are adjusted so that the diffusion rate of the helium in the nitrogen gas is sufficiently smaller than the flow rate of the viscous flow nitrogen gas. In such a state, if the average pressure of the viscous flow nitrogen gas in the intermediate portion 1 is set to be higher than the average pressure of the viscous flow nitrogen gas in the inner tube 2, helium flows to the inner tube side through the leak portion of the inner tube. Flows in, and the helium is detected by a helium leak detector 9 attached to a vacuum pump of the inner tube.
【００１０】即ち、窒素ガス１３を、圧力Ｐ１で、内管
２の一端から内管内にリークバルブ２２を経て導入し、
その他端からコンダクタンス調整バルブ２３を経て真空
ポンプ８により排気速度Ｓ１で排出する。That is, nitrogen gas 13 is introduced from one end of the inner tube 2 into the inner tube through the leak valve 22 at a pressure P1.
The gas is discharged from the other end by the vacuum pump 8 through the conductance adjusting valve 23 at the evacuation speed S1.
【００１１】また、窒素ガス１２とヘリウムガス１４と
を、圧力Ｐ２で、中間部１に、それぞれ、窒素ガス用リ
ークバルブ２４およびヘリウム用リークバルブ２８の操
作により交互に導入し、その中間部に、ヘリウム部１７
を窒素部１５および１７で挟んで交互に存在させなが
ら、コンダクタンス調整バルブ２５を経て真空ポンプ８
により排気速度Ｓ２で中間部から排出させる。A nitrogen gas 12 and a helium gas 14 are alternately introduced into the intermediate section 1 at a pressure P2 by operating a nitrogen gas leak valve 24 and a helium leak valve 28, respectively. , Helium part 17
Are alternately interposed between the nitrogen portions 15 and 17, and the vacuum pump 8 passes through the conductance adjusting valve 25.
To discharge from the intermediate portion at the evacuation speed S2.
【００１２】中間部の圧力Ｐ１が内管内の圧力Ｐ２より
高く設定されているので、窒素ガスに挟まれたヘリウム
ガスが漏洩個所３に到達すると、その個所を通して中間
部から内管内に洩れ出たヘリウム５が浸入する。この内
管内に浸入したヘリウムは、バルブ２３を経てヘリウム
リークディテクター９に導入されて内管の漏洩状況が観
測される。Since the pressure P1 in the intermediate portion is set higher than the pressure P2 in the inner tube, when the helium gas sandwiched by the nitrogen gas reaches the leak point 3, the helium gas leaks from the intermediate portion through the portion into the inner tube. Helium 5 enters. Helium that has entered the inner tube is introduced into the helium leak detector 9 via the valve 23, and the state of leakage of the inner tube is observed.
【００１３】[0013]
【実施例】以下、本発明による実施例を図３をもとに説
明する。図３では一例としてＬ＝５０ｍ、ｄ1＝０．３
ｍ、ｄ2＝０．５ｍとする。An embodiment according to the present invention will be described below with reference to FIG. In FIG. 3, as an example, L = 50 m, d 1 = 0.3
m, d 2 = 0.5 m.
【００１４】[0014]
【外１】 [Outside 1]
【００１５】[0015]
【数１】 (Equation 1)
【００１６】と表され、粘性流となるにはクヌードセン
数Ｋnが、In order to obtain a viscous flow, the Knudsen number Kn is
【００１７】[0017]
【数２】 (Equation 2)
【００１８】となるような条件を選ぶ必要がある。ただ
し、λは平均自由行程である。（１）と（２）式から窒
素の場合、It is necessary to select such a condition as follows. Here, λ is the mean free path. From the equations (1) and (2), in the case of nitrogen,
【００１９】[0019]
【外２】 [Outside 2]
【００２０】となる。粗引き用真空ポンプ８に吸入圧力
が１０Ｐａ以上で６０ｍ3／ｈ一定の排気速度を持つス
クロール型真空ポンプを使うと、Ｓ1＝１．６×１０-2
ｍ3／ｓとなる。また、窒素ガス１３の流量Ｑ1は、## EQU1 ## When a scroll type vacuum pump having a suction pressure of 10 Pa or more and a constant pumping speed of 60 m 3 / h is used as the roughing vacuum pump 8, S 1 = 1.6 × 10 -2.
m 3 / s. The flow rate Q 1 of the nitrogen gas 13 is
【００２１】[0021]
【数３】 (Equation 3)
【００２２】となり、その平均流速υ1は、And the average flow velocity υ 1 is
【００２３】[0023]
【数４】 (Equation 4)
【００２４】で表される。ただし、ηは窒素の粘性係数## EQU2 ## Where η is the viscosity coefficient of nitrogen
【００２５】[0025]
【外３】 [Outside 3]
【００２６】である。Ｐ1＝１０Ｐａｋｓｇ、（３）と
（４）からＰ2＝９．９３Ｐａ、Ｑ1＝０．１６Ｐａ−ｍ
3／ｓ、υ1＝０．２２ｍ／ｓとなる。υ1の調整はＳ1と
Ｑ1を変化させて行う。すなわち、Ｓ1の調整には真空ポ
ンプの吸気口にコンダクタンス調整バルブ２３を設置
し、Ｑ1の調整はリークバルブ２２で行う。## EQU1 ## P 1 = 10 Paksg, P 2 = 9.93 Pa, Q 1 = 0.16 Pa-m from (3) and (4)
3 / s, υ 1 = 0.22 m / s. Adjustment of upsilon 1 is performed by changing the S 1 and Q 1. That is, set up a conductance regulating valve 23 to the intake port of the vacuum pump to adjust the S 1, adjustment of the Q 1 is performed at a leak valve 22.
【００２７】一方、中間部に流す窒素ガスに関しては、
コンダクタンス調整バルブ２５を調整してＳ2＝ｌ×１
０-2ｍ3／ｓとし、かつ出口圧力２７をＰａ＝ｌ×１０5
Ｐａとすると、中間部の流量Ｑ2＝１０００Ｐａ−ｍ3／
ｓ、平均流速υ2＝０．０８ｍ3／ｓとなる。かかる状態
で窒素ガス用リークバルブ２４を閉じると同時にヘリウ
ム用リークバルブ２８を開いて５秒間、５００Ｐａ−ｍ
3／ｓのヘリウムを流し、再びリークバルブ２８を閉じ
ると同時にリークバルブ２４を開いて５０Ｐａ−ｍ3／
ｓの窒素ガスを流す。このようにして、中間部で窒素１
５と１７の流れの間にヘリウム１６の流れが挟まれるよ
うな状態が作られる。なお、ｌ×ｌ０ 5Ｐａの窒素とヘ
リウムが隣合わされた場合のヘリウムの拡散速度は上記
υ2に比べて十分小さいことが実験で確認されている。
このようにヘリウム１６が窒素１５と１７の流れに挟ま
れてυ2で移動し、漏洩箇所３を通過した瞬間、ヘリウ
ム１６の一部が内管２内に洩れ出し、今度はυ1でヘリ
ウムリークディテクター９に向かって移動する。ヘリウ
ムリークディテクター９はカウンターフロー方式のもの
を使い、Ｐ2＝１１Ｐａでもヘリウムの最小検出感度が
ｌ×ｌ０-10Ｐａ−ｍ 3／ｓのもの（例えばアネルバ製Ａ
−２１０Ｍ−ＬＤ）を使う。この時、ヘリウムを混入し
始めてからヘリウムリークディテクターでヘリウムが検
出されるまでの時間遅れＴは概略、On the other hand, regarding the nitrogen gas flowing to the intermediate portion,
Adjust the conductance adjusting valve 25 to STwo= 1 × 1
0-2mThree/ S and the outlet pressure 27 is Pa = 1 × 10Five
Pa, the flow rate Q in the middleTwo= 1000Pa-mThree/
s, average velocityυTwo= 0.08mThree/ S. Such a state
And close the nitrogen gas leak valve 24 at the same time
Open the leak valve 28 for 5 seconds, 500 Pa-m
Three/ S helium, and close the leak valve 28 again.
And at the same time, open the leak valve 24 to 50 Pa-mThree/
s of nitrogen gas. In this way, nitrogen 1
The flow of helium 16 is sandwiched between the flows of 5 and 17
Such a state is created. Note that l × 10 FivePa nitrogen and f
The diffusion rate of helium when lium is next to
υTwoIt has been confirmed by experiments that it is sufficiently smaller than that of.
The helium 16 is thus sandwiched between the flows of nitrogen 15 and 17.
TeTwoAt the moment of passing through the leak point 3
Part of the chamber 16 leaks into the inner pipe 2, and1With helicopter
It moves toward the umbrella detector 9. Heliu
The leak detector 9 is of counter flow type.
And use PTwo= 11Pa even at minimum sensitivity of helium
l × 10-TenPa-m Three/ S (for example, Anelva A
-210M-LD). At this time, mix helium
Helium is detected by a helium leak detector
The time delay T before being issued is roughly
【００２８】[0028]
【数５】 (Equation 5)
【００２９】で表され、Ｔから洩れの位置ｘは、The position x of the leak from T is
【００３０】[0030]
【数６】 (Equation 6)
【００３１】となる。例えばＴ＝３８６秒の時、（６）
式よりｘ＝２０ｍとなり、洩れの位置が特定できる。ま
た、洩れの大きさはヘリウムリークディテクター９の指
示値から求めることができる。なお、搬送ガスと漏洩探
知用ガスの組み合わせはこの実施例に限るものではな
く、両者を容易に識別することができて、かつ、搬送ガ
ス中の漏洩探知用ガスの拡散速度が粘性流における該搬
送ガスの平均移動速度よりも十分小さい組み合わせのも
のが本発明に適用可能である。## EQU1 ## For example, when T = 386 seconds, (6)
From the equation, x = 20 m, and the position of the leak can be specified. Further, the magnitude of the leak can be obtained from the indicated value of the helium leak detector 9. The combination of the carrier gas and the leak detection gas is not limited to this embodiment. A combination sufficiently smaller than the average moving speed of the carrier gas is applicable to the present invention.
【００３２】[0032]
【発明の効果】本発明によって内管の漏洩探知のために
従来必要とされていた、中間部や内管内に漏洩探知用の
ヘリウム吹付けノズルやヘリウムスニファープローブを
挿入して移動させる操作が一切不要となり、漏洩探知に
要するコストの大幅な低減を達成することができる。The operation of inserting a helium spray nozzle or a helium sniffer probe for leak detection into an intermediate portion or an inner tube, which is conventionally required for leak detection of an inner tube according to the present invention, is completely eliminated. This is unnecessary, and the cost required for leak detection can be significantly reduced.
【図１】 従来の内部真空法による内側配管漏洩探知方
法を示す図である。FIG. 1 is a diagram showing a conventional method for detecting an inner pipe leak by an internal vacuum method.
【図２】 従来の内部加圧法による内側配管漏洩探知方
法を示す図である。FIG. 2 is a diagram showing a conventional method of detecting an inner pipe leak by an internal pressurization method.
【図３】 本発明による内側配管漏洩探知方法を示す図
である。FIG. 3 is a diagram illustrating a method for detecting leakage of an inner pipe according to the present invention.
１： 中間部 ２： 内管 ３： 漏洩個所 ８： 真空ポンプ １２： 窒素ガス １４： ヘリウム 1: Intermediate part 2: Inner tube 3: Leakage point 8: Vacuum pump 12: Nitrogen gas 14: Helium
Claims (4)
よりも大きな内径を有する管で囲み、該内管と外管の隙
間（中間部）の両端の上流側から下流側へも気体が流れ
る構造を有する多重管の該内管の気体漏洩箇所を探知す
る方法において、該内管及び該中間部に粘性流の性質を
有する搬送ガスを該内管及び該中間部の上流側から供給
し、かつ、該中間部の平均圧力が該内管の平均圧力より
も大きくなるように設定し、該中間部の上流側から漏洩
検査用ガスを搬送ガスに混入させ、該内管の漏洩箇所を
通って該内管に流入した漏洩検査用ガスを検出すること
により、該内管の漏洩の有無を検知することを特徴とす
る気体用多重管の内側配管漏洩探知の方法。1. An outside of a pipe through which gas flows is surrounded by a pipe having an inner diameter larger than an outer diameter of the inner pipe, and from both ends of a gap (intermediate portion) between the inner pipe and the outer pipe from upstream to downstream. A method for detecting a gas leaking point of the inner tube of a multi-tube having a structure in which a gas flows, wherein a carrier gas having a viscous flow property is supplied to the inner tube and the intermediate portion on the upstream side of the inner tube and the intermediate portion. And the average pressure of the intermediate portion is set to be higher than the average pressure of the inner tube, and a leakage inspection gas is mixed into the carrier gas from the upstream side of the intermediate portion, A method for detecting a leak in an inner pipe of a gas multiple pipe, wherein the presence or absence of a leak in the inner pipe is detected by detecting a leak test gas flowing into the inner pipe through a leak location.
前記漏洩検査用ガスの混入開始から、該内管の漏洩箇所
を通って該内管に流入した前記漏洩検査用ガスが検出さ
れるまでの遅れ時間とその流量を測定し、該遅れ時間と
該流量とから前記内管の漏洩箇所の位置と漏れ量を探知
する請求項１に記載の気体用多重管の内側配管漏洩探知
の方法。2. An upstream side of the flow of the intermediate part carrier gas,
The delay time and the flow rate from the start of the mixing of the leak test gas to the detection of the leak test gas flowing into the inner pipe through the leak point of the inner pipe are measured. 2. The method of detecting leaks in the inner pipe of a gas multi-pipe according to claim 1, wherein the location and the amount of leak of the inner pipe are detected from the flow rate.
に混入させる際、一定の時間間隔で間欠的に混入させる
ことを特徴とする請求項１または請求項２に記載の気体
用多重管の内側配管漏洩探知の方法。3. The gas multi-pipe according to claim 1, wherein the leak inspection gas is intermittently mixed at a constant time interval when mixed with the intermediate portion carrier gas. Of leak detection of piping inside the tub.
の上流側に漏洩検査用ガスを混入させるための装置を各
々に設け、あるいは該装置を隔離弁を介して前記内管と
前記中間部の上流側に接続し、かつ、前記内管と前記中
間部の流れの下流側に漏洩検査用ガスを検出する検出器
を各々に設け、あるいは該検出器を隔離弁を介して前記
内管と前記中間部の流れの下流側に接続することを特徴
とする気体用多重管内側配管漏洩探知用装置。4. An apparatus for mixing a leak test gas upstream of the flow of the carrier gas between the inner pipe and the intermediate section is provided in each of the apparatus, or the apparatus is connected to the inner pipe via an isolation valve. A detector connected to the upstream side of the intermediate portion and detecting a leak test gas downstream of the inner pipe and the flow of the intermediate portion is provided for each, or the detector is connected to the inner side via an isolation valve. A device for detecting leakage of a pipe inside a multi-pipe for gas, wherein the apparatus is connected to a downstream side of a flow between the pipe and the intermediate section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17100299A JP4203836B2 (en) | 1999-06-17 | 1999-06-17 | Method for detecting gas leakage in inner pipe of gas multi-pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17100299A JP4203836B2 (en) | 1999-06-17 | 1999-06-17 | Method for detecting gas leakage in inner pipe of gas multi-pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001004479A true JP2001004479A (en) | 2001-01-12 |
| JP4203836B2 JP4203836B2 (en) | 2009-01-07 |
Family
ID=15915295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17100299A Expired - Fee Related JP4203836B2 (en) | 1999-06-17 | 1999-06-17 | Method for detecting gas leakage in inner pipe of gas multi-pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4203836B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175661A (en) * | 2013-03-01 | 2013-06-26 | 南京理工大学 | Isotopic positioning and detecting method for micro-nano production dust leakage sources |
| CN113295345A (en) * | 2021-05-08 | 2021-08-24 | 广西防城港核电有限公司 | Method for detecting leakage point of inner pipe of double-wall pipe |
| CN113465839A (en) * | 2021-07-02 | 2021-10-01 | 博众精工科技股份有限公司 | Helium gas detection leakage equipment |
-
1999
- 1999-06-17 JP JP17100299A patent/JP4203836B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175661A (en) * | 2013-03-01 | 2013-06-26 | 南京理工大学 | Isotopic positioning and detecting method for micro-nano production dust leakage sources |
| CN113295345A (en) * | 2021-05-08 | 2021-08-24 | 广西防城港核电有限公司 | Method for detecting leakage point of inner pipe of double-wall pipe |
| CN113465839A (en) * | 2021-07-02 | 2021-10-01 | 博众精工科技股份有限公司 | Helium gas detection leakage equipment |
| CN113465839B (en) * | 2021-07-02 | 2024-04-12 | 博众精工科技股份有限公司 | Helium gas detection leakage equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4203836B2 (en) | 2009-01-07 |
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