JP3774719B2 - Gas outlet for airtight leak test - Google Patents

Gas outlet for airtight leak test Download PDF

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JP3774719B2
JP3774719B2 JP2003423328A JP2003423328A JP3774719B2 JP 3774719 B2 JP3774719 B2 JP 3774719B2 JP 2003423328 A JP2003423328 A JP 2003423328A JP 2003423328 A JP2003423328 A JP 2003423328A JP 3774719 B2 JP3774719 B2 JP 3774719B2
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gas
liquid
gas outlet
outlet
trap
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JP2005181141A (en
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正敏 岡野
利勝 那須
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Okano Valve Mfg Co Ltd
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Description

本発明は、圧力容器や各種安全弁等の気密試験等に使用される漏洩量計測装置に用いる気体導出具に関し、特に窒素や、空気等の圧縮性流体を加圧して被計測部に作用させ、漏出した加圧圧縮性流体を集めて圧縮性流体の漏洩量計測装置に導く気体導出具に関するものである。   The present invention relates to a gas derivation tool used in a leak amount measuring device used for an air tightness test such as a pressure vessel and various safety valves, in particular, pressurizing a compressible fluid such as nitrogen or air to act on a measurement target part, The present invention relates to a gas outlet that collects leaked pressurized compressive fluid and guides it to a leak measuring device for compressive fluid.

高圧のガス、気体、蒸気等を収容する圧力容器や、これに直接的又は間接的に設けられる安全弁等は、加圧した圧縮性の流体（以下、「加圧気体」とも称する）を用いて耐圧気密試験や弁座気密試験が行われる。かかる弁座気密試験に用いる装置としては、特開平７−２６０５４１号公報に開示された圧縮性流体の漏洩量計測装置がある。この計測装置では、液体容器内に液体を入れておき、開口端を液体内に沈めるようにしてメスシリンダを上下逆さまに立設する。そして、安全弁から漏洩した加圧気体を、気体導出管を用いて液体中に案内し、泡状となって浮上してくる加圧気体をメスシリンダ内に収集する。そして、メスシリンダ内に集められた気体量から漏洩量を計測していた（例えば、特許文献１参照）。   A pressure vessel that contains high-pressure gas, gas, steam, etc., or a safety valve that is directly or indirectly provided on the pressure vessel uses a pressurized compressive fluid (hereinafter also referred to as “pressurized gas”). Pressure and air tightness tests and valve seat tightness tests are conducted. As an apparatus used for the valve seat airtight test, there is a compressible fluid leakage amount measuring apparatus disclosed in Japanese Patent Laid-Open No. 7-260541. In this measuring apparatus, the graduated cylinder is set upside down so that the liquid is put in the liquid container and the open end is submerged in the liquid. Then, the pressurized gas leaked from the safety valve is guided into the liquid using a gas outlet tube, and the pressurized gas floating in the form of bubbles is collected in the measuring cylinder. And the amount of leakage was measured from the amount of gas collected in the measuring cylinder (for example, refer to patent documents 1).

ところで、蒸気用及びガス用のばね式安全弁の弁座気密性試験については、ＪＩＳ（日本工業規格）Ｂ８２１０として規定があり、それによれば、液体容器内に出口端部が設置される気体導出管は、外径８ｍｍ、内径６ｍｍの管を用い、その出口端面は管中心線に対して直角且つ平滑に切断されると共に液面下１３ｍｍの深さにあって液面に平行に固定されていなければならないと規定されている。   By the way, the valve seat hermeticity test of the spring type safety valve for steam and gas is defined as JIS (Japanese Industrial Standard) B8210, and according to this, the gas outlet pipe in which the outlet end is installed in the liquid container Uses a tube with an outer diameter of 8 mm and an inner diameter of 6 mm, and its outlet end surface is cut perpendicularly and smoothly to the tube center line and is 13 mm deep below the liquid level and fixed parallel to the liquid level. It is stipulated that it must be done.

かかるＪＩＳ規定を考慮しながらも、気体の捕獲効率を上げるため、弁座気密試験に際しては図５に示すような形態の気体導出管を採用していた。まず、液体容器内の液体１に対して、メスシリンダ３をその開口端５が液面７に浸かるように上下逆さまに設置する。そして、気体導出管９を、その出口端１１がメスシリンダ３の開口端５の下方に位置するように配置する。気体導出管９は、液面７に対して垂直に延長する垂直部１３と、第１折り曲げ部１５を介して設けられ液面７と平行に延長して気体をメスシリンダ３の下方まで案内する平行部１７と、平行部１７から折り曲げ加工することによって形成された出口端１１とを有する。このような構成によって、漏洩した気体は、気体導出管９の出口端１１より液体中に放出され、気泡２１としてメスシリンダ３に収集される。   In consideration of such JIS regulations, in order to increase the gas capture efficiency, a gas outlet pipe having a configuration as shown in FIG. First, with respect to the liquid 1 in the liquid container, the measuring cylinder 3 is installed upside down so that the opening end 5 is immersed in the liquid surface 7. Then, the gas outlet pipe 9 is arranged so that the outlet end 11 is positioned below the opening end 5 of the graduated cylinder 3. The gas outlet tube 9 is provided via a vertical portion 13 extending perpendicularly to the liquid surface 7 and a first bent portion 15 and extends parallel to the liquid surface 7 to guide the gas to the lower side of the graduated cylinder 3. It has the parallel part 17 and the exit end 11 formed by bending from the parallel part 17. With such a configuration, the leaked gas is discharged into the liquid from the outlet end 11 of the gas outlet tube 9 and is collected in the measuring cylinder 3 as bubbles 21.

特開平７−２６０４５１号公報JP 7-260451 A

しかしながら、上述したように、図５に示す形態の気体導出管９においては、平行部１７から折り曲げ加工することによって出口端１１を形成しているため、出口端１１の端面を液面７に対して正確に平行に形成することが困難であった。   However, as described above, in the gas outlet tube 9 having the form shown in FIG. 5, the outlet end 11 is formed by bending from the parallel portion 17, so that the end surface of the outlet end 11 is made to face the liquid surface 7. Therefore, it was difficult to form them accurately in parallel.

本発明は、上記に鑑みてなされたものであり、ＪＩＳ規定に準拠しながらも気体の捕獲効率を好適に確保することができる気密漏洩試験用の気体導出具を提供することを目的とする。   The present invention has been made in view of the above, and an object of the present invention is to provide a gas lead-out tool for an airtight leak test capable of suitably ensuring gas capture efficiency while complying with JIS regulations.

上述した目的を達成するため、本発明は、出口端から気体案内液体中に配置される部分までが直管状に形成された気体導出管と、前記出口端から放出された気体を捕獲する捕獲器とを有する、気密漏洩試験に用いられる気体導出具であって、前記捕獲器は、器状の部材からなり、該捕獲器を前記液体中に配置した際に、上面及び下向きに開口した口を備えた器状部と、前記上面に設けられ、前記出口端と接続する導出管受け部と、前記上面に設けられ、前記出口端の端面が液面と平行であるときに上向きに開口する放出口とを有し、前記上面は、前記出口端の端面が液面と平行であるときに、前記導出管受け部から前記放出口に向かって上り勾配の斜面となっていることを特徴とする。 To achieve the above object, the present invention is the capture of capturing the gas outlet pipe to the portion arranged in the gas guide in the liquid formed in the straight pipe from the exit end, the gas released from the outlet end to Yes and vessels, a gas outlet device used for air leakage test, the trap consists vessel-shaped member, upon placing the trap into the liquid, and open to the top and downwards A vessel-shaped portion having a mouth, a lead pipe receiving portion provided on the upper surface and connected to the outlet end, provided on the upper surface, and opened upward when the end surface of the outlet end is parallel to the liquid surface. And the upper surface is an upward slope from the outlet tube receiving portion toward the discharge port when the end surface of the outlet end is parallel to the liquid level. And

好適には、前記気体導出管は、湾曲部から両方の端面までが等間隔となるＬ字状に形成されている。
また、気体導出管の端部には、端面から１３ｍｍの位置に液面の位置を合わせるための標示が設けられていると好適である。

Preferably, the gas lead-out pipe is formed in an L-shape that is equidistant from the curved portion to both end faces.
In addition, it is preferable that an indication for aligning the position of the liquid level at a position 13 mm from the end face is provided at the end of the gas outlet pipe .

本発明によれば、液面下１３ｍｍの深さで液面と平行に下向きに気体導出管の出口端をセットしながらも、出口端から液体中に案内された漏洩気体は、一旦、捕獲器に集められ、そこから上記セット状態で上向きに開口する放出口を介してメスシリンダに向けて気泡として放出される。よって、ＪＩＳ規定に準拠しながらも、気体の捕獲効率を好適に確保することができる。   According to the present invention, while the outlet end of the gas outlet pipe is set downward in parallel with the liquid level at a depth of 13 mm below the liquid level, the leaked gas guided into the liquid from the outlet end is once trapped. From there, it is discharged as bubbles toward the graduated cylinder through the discharge port that opens upward in the set state. Therefore, the gas capture efficiency can be suitably ensured while complying with JIS regulations.

以下、本発明を、主蒸気逃がし安全弁の弁座気密漏洩試験用の気体導出具として実施した場合の実施の形態を添付図面に基づいて説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment in which the present invention is implemented as a gas outlet for a valve seat airtight leak test of a main steam escape safety valve will be described with reference to the accompanying drawings.

図１に示されるように、気体導出具３１は、気体導出管３３と、捕獲器３５とを備えている。気体導出管３３は、透明なガラス管より構成されており、図１及び図２に示されるように、中央に位置する湾曲部３７から両方の端面３９、４１までが等間隔となるＬ字状に形成されている。すなわち、気体導出管３３は、何れか一方の端部を気体案内液体中に配置したときに、端面から液体中に配置されている部分までが直管状の部分となる。本実施の形態では、気体導出管３３は、総長さ３５０ｍｍ、外形８ｍｍ、内径６ｍｍの透明ガラス管を使用し、その中央部で９０度に湾曲されて構成されている。また、気体導出管３３の両端面３９、４１は、管の中心線ＣＬに対して平滑且つ正確に直角に切断されている。さらに、気体導出管３３の両端部には、端面から１３ｍｍの位置に液面７の位置を合わせるための標示４３、４５が設けられている。標示４３、４５は、本実施の形態では、ケガキ線として設けられるが、液面７の位置が案内できる標示であれば他の態様でもよく、凹凸やマークなどの印でもよい。   As shown in FIG. 1, the gas outlet 31 includes a gas outlet pipe 33 and a trap 35. The gas outlet tube 33 is made of a transparent glass tube, and as shown in FIGS. 1 and 2, an L-shape in which the curved portion 37 located at the center and both end surfaces 39 and 41 are equally spaced. Is formed. That is, when any one end portion of the gas outlet pipe 33 is disposed in the gas guiding liquid, the portion extending from the end surface to the portion disposed in the liquid becomes a straight tubular portion. In the present embodiment, the gas outlet tube 33 uses a transparent glass tube having a total length of 350 mm, an outer shape of 8 mm, and an inner diameter of 6 mm, and is bent at 90 degrees at the center thereof. Further, both end faces 39 and 41 of the gas outlet pipe 33 are cut smoothly and accurately at a right angle with respect to the center line CL of the pipe. Further, at both ends of the gas outlet pipe 33, signs 43 and 45 for adjusting the position of the liquid surface 7 to a position 13 mm from the end face are provided. In the present embodiment, the markings 43 and 45 are provided as marking lines. However, the markings 43 and 45 may be in other forms as long as they can guide the position of the liquid surface 7, and may be marks such as unevenness and marks.

捕獲器３５は、透明な樹脂材料（本実施の形態ではアクリル）から構成された器状の部材からなる。捕獲器３５は、図３及び図４に示されるように、器状部４７と、導出管受け部４９とを有する。器状部４７は、図３に示されるように器の口４７ａを下向きにして使用するように企図されており、導出管受け部４９は、器状部４７の上面（器でいう底）４７ｂに穿設されている気体捕獲口５１に接続するように一体的に立設されている。導出管受け部４９は、筒状に構成されており、その測部には、気体導出管３３を固定するためのねじ手段用の穴が設けられている。また、器状部４７の上面４７ｂには、捕獲した気体を液体中ひいては後述するメスシリンダに案内するための放出口５３が穿設されている（本実施の形態では、６ｍｍの直径）。また、器状部４７の上面４７ｂは、捕獲器３５を液体中に適切に配置した際に、器状部４７内の気体を放出口５３に向けて案内する斜面として機能する。本実施の形態では、上面４７ｂは口４７ａに対して側面視１０度の傾きを有する。   The trap 35 is made of a vessel-shaped member made of a transparent resin material (acrylic in the present embodiment). As shown in FIGS. 3 and 4, the trap 35 has a vessel-shaped portion 47 and a lead-out tube receiving portion 49. The container 47 is intended to be used with the container mouth 47a facing downward as shown in FIG. 3, and the outlet tube receiving portion 49 is formed on the upper surface (bottom) 47b of the container 47. It is erected integrally so as to be connected to the gas capturing port 51 formed in. The outlet pipe receiving portion 49 is formed in a cylindrical shape, and a screw means hole for fixing the gas outlet pipe 33 is provided in the measuring portion. The upper surface 47b of the vessel-shaped portion 47 is provided with a discharge port 53 for guiding the trapped gas in the liquid and then to a graduated cylinder described later (in this embodiment, a diameter of 6 mm). Further, the upper surface 47 b of the vessel-shaped portion 47 functions as a slope that guides the gas in the vessel-shaped portion 47 toward the discharge port 53 when the trap 35 is appropriately disposed in the liquid. In the present embodiment, the upper surface 47b has an inclination of 10 degrees in a side view with respect to the mouth 47a.

次に、以上のような構成を有する気体導出具の動作について説明する。まず、液体容器内の液体１に対して、メスシリンダ３をその開口端５が液面７に浸かるように上下逆さまに設置する。気体導出管３３の一方の端面３９を液面７と平行になるように、気体導出管３３の一方側の端部を液体１中に配置する。このとき、気体導出管３３は、液体１中に配置される部分が直管状であり、すなわち、図５に示した構成のように液体１中において急激に折り曲げられて液面と平行な端面が形成される態様ではないので、端面を液面に対して容易且つ正確に平行に構成することができる。さらに、気体導出管３３を液体１中に沈める程度は、対応する標示４３を単純に液面７に重ね合わせるたけでよく、端面３９を液面７から正確に１３ｍｍの位置に沈めてセットすることができる。また、標示４３、４５の加工も直管状の部分に施すため、より容易且つ正確に設けることができる。   Next, operation | movement of the gas derivation | leading tool which has the above structures is demonstrated. First, with respect to the liquid 1 in the liquid container, the measuring cylinder 3 is installed upside down so that the open end 5 is immersed in the liquid surface 7. One end of the gas outlet tube 33 is arranged in the liquid 1 so that one end surface 39 of the gas outlet tube 33 is parallel to the liquid surface 7. At this time, the portion of the gas outlet pipe 33 arranged in the liquid 1 is a straight tube, that is, the end face parallel to the liquid surface is abruptly bent in the liquid 1 as in the configuration shown in FIG. Since it is not an aspect to be formed, the end face can be easily and accurately configured parallel to the liquid level. Furthermore, the degree to which the gas outlet pipe 33 is submerged in the liquid 1 is only to superimpose the corresponding marking 43 on the liquid surface 7, and the end surface 39 is set at a position precisely 13 mm from the liquid surface 7. Can do. Further, since the markings 43 and 45 are also processed on the straight tubular portion, the markings 43 and 45 can be provided more easily and accurately.

さらに、上記のようにして端面３９が正確に液面７と平行にセットされ得る気体導出管３３の一方の端部に、捕獲器３５が取り付けられる。すなわち、口４７ａを下向きにして捕獲器３５の導出管受け部４９に気体導出管３３の対応する端部を挿入し、導出管受け部４９の側部の穴を介してねじ手段５１によって捕獲器３５と気体導出管３３との接続が固定される。また、気体導出管３３の他方の端部には、透明ビニールホース５５の一端５７が接続されている。かかる透明ビニールホース５５の他端は、図示しない主蒸気逃し弁の安全弁の２次側に取り付けられた閉止フランジに接続されている。   Furthermore, the trap 35 is attached to one end of the gas outlet pipe 33 in which the end face 39 can be accurately set parallel to the liquid level 7 as described above. That is, the corresponding end portion of the gas outlet pipe 33 is inserted into the outlet pipe receiving portion 49 of the trap 35 with the port 47a facing downward, and the trapping means is captured by the screw means 51 through the side hole of the outlet pipe receiving portion 49. The connection between 35 and the gas outlet pipe 33 is fixed. One end 57 of the transparent vinyl hose 55 is connected to the other end of the gas outlet pipe 33. The other end of the transparent vinyl hose 55 is connected to a closing flange attached to the secondary side of a safety valve (not shown) of the main steam relief valve.

弁座気密漏洩試験においては、気体導出具３１の気体導出管３３に安全弁から漏洩してきた気体が透明ビニールホース５５を介して導入される。漏洩気体は、気体導出管３３を流れた後、端面３９から器状部４７内の液体１中に案内される。そして、漏洩気体は、捕獲器３５内で上面４７ｂに沿ってより水位の上方の位置へと案内され、最頂部にある放出口５３から捕獲器３５外部へと放出される。放出された漏洩気体は、気泡２１としてメスシリンダ３に収集される。メスシリンダ３内に集められた気体量から漏洩量が算出される。   In the valve seat hermetic leak test, the gas leaked from the safety valve to the gas outlet pipe 33 of the gas outlet 31 is introduced through the transparent vinyl hose 55. The leaked gas flows through the gas outlet pipe 33 and is then guided from the end face 39 into the liquid 1 in the vessel 47. Then, the leaked gas is guided to a position above the water level along the upper surface 47b in the trap 35 and discharged from the discharge port 53 at the top to the outside of the trap 35. The released leaked gas is collected in the measuring cylinder 3 as the bubble 21. The amount of leakage is calculated from the amount of gas collected in the graduated cylinder 3.

このように本実施の形態では、ＪＩＳ規定を準拠し、それによって、液面下１３ｍｍの深さで液面と平行に下向きに気体導出管３３の出口端をセットしながらも、出口端から液体中に案内された漏洩気体は、一旦、捕獲器３５に集められ、そこから上記セット状態で上向きに開口する放出口を介してメスシリンダ３に向けて気泡として放出される。よって、ＪＩＳ規定に準拠しながらも、気体の捕獲効率を好適に確保することができる。また、気体導出管３３は、中央に位置する湾曲部３７から両方の端面３９、４１までが等間隔となる対称形状に構成され、加えて、両端に標示４３、４５が設けられている。このため、気体導出管３３の両端の何れも、液体１中への漏洩気体の出口端として使用することができ、必要に応じて端部を自由に入れ替えて使用することも容易である。また、気体導出管３３及び捕獲器３５は共に透明部材から構成され且つ液体１中に沈められているため、両者の接続部から気体の漏れがある否かは簡単に確認することができる。   As described above, in the present embodiment, JIS regulations are complied with, thereby setting the outlet end of the gas outlet pipe 33 downward in parallel to the liquid surface at a depth of 13 mm below the liquid surface, while the liquid is discharged from the outlet end. The leaked gas guided inside is once collected in the trap 35 and then discharged as bubbles toward the graduated cylinder 3 through the discharge port that opens upward in the set state. Therefore, the gas capture efficiency can be suitably ensured while complying with JIS regulations. In addition, the gas outlet pipe 33 is configured in a symmetrical shape with an equal interval from the curved portion 37 located at the center to both end faces 39, 41, and in addition, signs 43, 45 are provided at both ends. For this reason, any of both ends of the gas outlet pipe 33 can be used as an outlet end of the leaked gas into the liquid 1, and it is also easy to use the end portions freely as necessary. Further, since both the gas outlet pipe 33 and the trap 35 are made of a transparent member and are submerged in the liquid 1, it can be easily confirmed whether or not there is a gas leak from the connecting portion between them.

本発明の実施の形態に係る気体導出具を弁座気密漏洩試験のためにセットした状態を示す図である。It is a figure which shows the state which set the gas derivation tool which concerns on embodiment of this invention for the valve-seat airtight leak test. 図１の気体導出具を構成する気体導出管単体の側面図である。It is a side view of the gas lead-out pipe simple substance which comprises the gas lead-out | guiding tool of FIG. 図１の気体導出具を構成する捕獲器単体の側面図である。It is a side view of the trap single body which comprises the gas derivation | leading-out tool of FIG. 図３の捕獲器単体の平面図である。It is a top view of the trap unit of FIG. 既存の気体導出管を弁座気密漏洩試験のためにセットした状態を示す図である。It is a figure which shows the state which set the existing gas derivation | leading-out pipe | tube for the valve-seat airtight leak test.

符号の説明Explanation of symbols

３１ 気体導出具、３３ 気体導出管、３５ 捕獲器、３９、４１ 端面、４３、４５ 標示、４７ｂ 上面（斜面）、５３ 放出口。   31 gas outlet, 33 gas outlet tube, 35 trap, 39, 41 end face, 43, 45 marking, 47b upper surface (slope), 53 outlet.

Claims (3)

出口端から気体案内液体中に配置される部分までが直管状に形成された気体導出管と、前記出口端から放出された気体を捕獲する捕獲器とを有する、気密漏洩試験に用いられる気体導出具であって、
前記捕獲器は、
器状の部材からなり、該捕獲器を前記液体中に配置した際に、上面及び下向きに開口した口を備えた器状部と、
前記上面に設けられ、前記出口端と接続する導出管受け部と、
前記上面に設けられ、前記出口端の端面が液面と平行であるときに上向きに開口する放出口と
を有し、
前記上面は、前記出口端の端面が液面と平行であるときに、前記導出管受け部から前記放出口に向かって上り勾配の斜面となっていることを特徴とする気体導出具。 Until portion disposed in the gas guide the liquid from the outlet end is closed and the gas outlet tube formed in a straight tubular, and a trap to capture the gas released from the outlet end, the gas used in the air leakage test A deriving tool,
The trap is
A vessel-shaped member comprising a vessel-shaped member, and when the trap is disposed in the liquid, a vessel-like portion having an upper surface and a mouth opened downward;
A lead-out pipe receiving portion provided on the upper surface and connected to the outlet end;
A discharge port provided on the upper surface and opening upward when an end surface of the outlet end is parallel to the liquid surface;
Have
The gas outlet device according to claim 1, wherein the upper surface has an upward slope from the outlet pipe receiving portion toward the discharge port when an end surface of the outlet end is parallel to the liquid surface . 前記気体導出管は、湾曲部から両方の端面までが等間隔となるＬ字状に形成されていることを特徴とする請求項１に記載の気体導出具。   The gas deriving device according to claim 1, wherein the gas deriving tube is formed in an L shape having an equal interval from the curved portion to both end faces. 気体導出管の端部には、端面から１３ｍｍの位置に液面の位置を合わせるための標示が設けられていることを特徴とする請求項１又は２に記載の気体導出具。   The gas outlet according to claim 1 or 2, wherein the end of the gas outlet pipe is provided with a mark for adjusting the position of the liquid surface at a position of 13 mm from the end face.
JP2003423328A 2003-12-19 2003-12-19 Gas outlet for airtight leak test Expired - Lifetime JP3774719B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003423328A JP3774719B2 (en) 2003-12-19 2003-12-19 Gas outlet for airtight leak test

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003423328A JP3774719B2 (en) 2003-12-19 2003-12-19 Gas outlet for airtight leak test

Publications (2)

Publication Number Publication Date
JP2005181141A JP2005181141A (en) 2005-07-07
JP3774719B2 true JP3774719B2 (en) 2006-05-17

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Country Link
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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5217421B2 (en) * 2007-12-26 2013-06-19 トヨタ自動車株式会社 Seal member hermetic test apparatus and seal member hermetic test method
CN116007854B (en) * 2023-03-24 2023-06-23 临沂千源包装印刷有限公司 Detection device for detecting air tightness and pressure resistance of packaging bag

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