JPH0569652U

JPH0569652U - Container leak detector

Info

Publication number: JPH0569652U
Application number: JP7526392U
Authority: JP
Inventors: 理一郎笠原
Original assignee: New Cosmos Electric Co Ltd
Current assignee: New Cosmos Electric Co Ltd
Priority date: 1992-10-29
Filing date: 1992-10-29
Publication date: 1993-09-21
Anticipated expiration: 2000-09-05
Also published as: JPH0622193Y2

Abstract

(57)【要約】【目的】被検容器のわずかな漏洩であっても、正確に
且つスピーディーに検知できるようにする。【構成】揮発性液体を気化させて検査用ガスを造る気
化器３ｂと、その気化器３ｂで造られた検査用ガスを密
閉チャンバー２内の被検容器１に圧入自在な圧入路４を
通して圧入する圧入装置３ｃとを、検査用ガスの供給源
３に設け、チャンバー２内の気体を送風機６を介して取
り出してチャンバー２内に戻すチャンバー内気体循環用
密閉流路７を設けると共に、その密閉流路７内に、並列
に接続された第一分路１４ａと第二分路１４ｃとを設
け、第一分路１４ａにガス検知器８を配置し、第一・第
二分路１４ａ，１４ｂに、それらの流通気体流量をそれ
ぞれ調整自在な一対の流量調整装置１４ｂ，１４ｄを各
別に設けてある。 (57) [Summary] [Purpose] To enable accurate and speedy detection of even the slightest leak of the container under test. [Structure] Vaporizer 3b that vaporizes a volatile liquid to produce an inspection gas, and the inspection gas produced by the vaporizer 3b is press-fitted into a test container 1 in a closed chamber 2 through a press-fitting passage 4 that can be press-fitted. And a pressurizing device 3c for supplying the inspection gas to the supply source 3 for the inspection gas, and to provide a closed channel 7 for circulating the gas in the chamber to return the gas in the chamber 2 to the inside of the chamber 2 through the blower 6 and to hermetically seal the same. A first shunt 14a and a second shunt 14c connected in parallel are provided in the flow path 7, the gas detector 8 is arranged in the first shunt 14a, and the first and second shunts 14a, 14b are provided. In addition, a pair of flow rate adjusting devices 14b and 14d, which can adjust the flow rates of the circulating gases, are separately provided.

Description

【考案の詳細な説明】【０００１】【産業上の利用分野】本考案は、周壁、頂・底板などに小孔ないしピンホールが存在することによる内容物漏洩を生じることが好ましくない各種容器、例えば自動車のガソリンタンク、石油ストーブの石油貯槽部、冷房装置、又は、冷凍装置の冷媒貯蔵耐圧容器、高圧ガス容器等、その他種々の容器の漏れを検知するための漏洩検知装置に関し、さらに詳しくは、被検容器内部にガスセンサーにより検知可能なガスを導入加圧して器外への該ガスの漏出の有無を該センサーで検知する装置に関する。【０００２】【従来の技術】被検容器の圧入されるガスとして不燃性のヘリウムを用いる提案、及び不燃性フレオンガスを用いる提案は既に従来からなされていると共に相当程度実用化されている。そしてヘリウムを用いる場合のガスセンサーとしては、その熱伝導率が他の気体（水素を除く）よりも高いことを利用しているものがある。又、フレオンガスを用いる場合には、ＦＩＤ法、つまりイオン化水素炎法の高価なガスセンサーが用いられる。ヘリウムは可燃性が無いので、安全である利点と小孔をも通過し易い利点があるが、そのセンサーには感度の問題がある。【０００３】さらに、上記ヘリウム及び大部分のフレオンガスは常温で気体であるため法定の内圧容器中に高圧下で液状のまま貯蔵せねばならず、安全上及びコスト面で種々の問題がある。ヘリウムは無害であるが、フレオンガスも大量に作業環境及び大気中へ放出することは不可能であり、漏洩検知装置は複雑高価なものとなる欠点がある。【０００４】【考案が解決しようとする課題】このように従来の提案では、センサーのガス感度、検査用ガスの保管・取扱などの点で種々の不都合がある。この実情に鑑み、本考案の課題は、本件出願人が既に開発した種々のガスセンサーのいずれか又は広汎に実用されているものを用いての高感度検知が可能な検査用ガスの採用と、これに立脚した漸新かつ合理的で低コストでの大規模実施が容易な漏洩検知装置を提供することにある。【０００５】【課題を解決するための手段】この目的を達成するための本考案における容器の漏洩検知装置の特徴構成は、揮発性液体を気化させて検査用ガスを造る気化器と、その気化器で造られた前記検査用ガスを密閉チャンバー内の被検容器に圧入自在な圧入路を通して圧入する圧入装置とを、前記検査用ガスの供給源に設け、前記チャンバー内の気体を送風機を介して取り出して前記チャンバー内に戻すチャンバー内気体循環用密閉流路を設けると共に、前記密閉流路内に、並列に接続された第一分路と第二分路とを設け、前記第一分路に前記ガス検知器を配置し、前記第一・第二分路に、それらの流通気体流量をそれぞれ調整自在な一対の流量調整装置を各別に設けてあるところにある。【０００６】尚、前記揮発性液体がアルコールであり、前記気化器が加熱手段と霧化手段との一方または双方を備えたものであってもよく、更には、前記ガス検知器が、酸化スズ半導体素子にアルカリ土類金属の酸化物を担持させたアルコール敏感性熱線型半導体式ガスセンサーであってもよい。【０００７】本考案によれば、被検容器に検査用ガスの供給源を接続した状態でチャンバー内へ収納する工程と、上記供給源から上記被検容器内へ検査用ガスを導入すると共に該容器の内圧を所定値にまで高める工程と、次いで、上記チャンバー内部の気体を取出してガスセンサーにより該気体中の上記検査用ガスの存否を検査する工程と、そのあと上記被検容器を上記チャンバーから取出すと共に、上記工程で検査用ガスの存在が検出された場合に上記チャンバー内の気体をパージしたのち、次の被検容器を受入れる工程とからなる容器漏洩検知方法において、上記の検査用ガスが常温で液体の低沸点低毒性の可燃性有機化合物の蒸気をその下方爆発限度未満の濃度で含有している混合気体であり、上記のガスセンサーが上記有機化合物を敏感に検出しうるものであることを特徴とする装置であって、検査用ガスの供給源と、この供給源に接続された状態の被検容器を収納するチャンバーと、上記被検容器の内圧を高める手段と、上記チャンバーからその内部の気体を取出す管路と、この管路に接続されたガスセンサーと、上記チャンバー内の気体をパージする手段とを備えた容器漏洩検知装置において、上記検査用ガスの供給源が、常温で液体の低沸点低毒性の可燃性有機化合物の蒸気を含有した混合気体の供給源であり、上記ガスセンサーが該有機化合物を敏感に検出しうるものであることを特徴とする装置が提供される。【０００８】上記において検査用ガスの導入後における被検容器内部の加圧は絶体圧１．１〜１．５ｋｇ／ｃｍ²（ゲージ圧０．１〜０．５ｋｇ／ｃｍ²）が適当であり、この加圧と検査用ガスの導入とを同時に行うこともできる。例えば上記容器へ至る管路の中に適宜の空気圧送用ポンプを設け、該ポンプの吸込側へ気化後ないし気化中の上記化合物を所定量供給すればよい。【０００９】整髪用、殺虫剤用などのスプレー容器の場合には２〜４ｋｇ／ｃｍ²（絶体圧) 、つまりゲージ圧１〜３ｋｇ／ｃｍ²で内容物が充填されているので、被検容器へ加える内圧もこれを考慮したものとされる。【００１０】この装置で用いられる常温で液体、低沸点低毒性の可燃性有機化合物は低級アルカン、低級アルケン、低級アルコール、低級アルキル基からなるケトン及びエーテルの中から選ばれ、好ましくはペンタン、ヘキサン、ペンテン、ヘキセン、メタノール、プロパノール、ブタノール、アセトン、及びエチルエーテルの中から選ばれ、さらに好ましくはエタノールが選ばれる。そしてエタノールが選ばれた場合には従来公知のアルコール敏感性ガスセンサーに加え、本件出願人の先の出願に係る「アルコール選択性ガス検知素子」（特願昭６１−２３６７３号）が特に好都合に利用できるものの一つである。この検知素子は、水素（Ｈ₂）、一酸化炭素（ＣＯ）、及びメタン（ＣＨ₄）が混在していてもエタノール等のアルコールのみを高感度で検知するという極めて独特な構造のものであり、該素子の主成分は酸化スズであり、これにアルカリ土類金属の酸化物が担持された金属酸化物半導体（ＭＯＳ）となっている。【００１１】本考案の装置で用いられる検査用ガス供給源は、エタノール等の液状可燃性有機化合物を実質上瞬間的に気化させる方式のもの、又は、予め気化されたエタノール等の化合物の蒸気を所定濃度で含有している混合気体の貯槽を備えた方式のもの、あるいはその両者を併せ備えた方式のもののいずれであってもよい。【００１２】【作用】本考案における検査用ガス調製のための上記有機化合物は、上記先願の「ガス検知素子」のみならず、一般に金属酸化物半導体（ＭＯＳ）を用いたガスセンサーにより高感度で検知される。これらガスセンサーを検知原理により大別すれば、冒頭に記した熱伝導率の変化を検出するもののほかに、ＭＯＳへの吸着により該ＭＯＳの電導度が変化することを利用したものがある。そしてこの後者のタイプのガスセンサーの中には加熱用電熱線と検出電極とを備えた３端子〜４端子型のものと、検出電極をもって加熱用電極線の作用をも兼ねさせる２端子型の、熱線型半導体式のものとがある。この熱線型は本件出願人が既に多数提案している如く軽量、小型かつ、ガス吸着及びその定常状態への復帰が速い、つまり応答速度が大である、等々の長所を備えているから、特に本考案での使用に適している。【００１３】本考案における有機化合物の検知には特に後者のガスセンサーが好適である。何故ならばこれら化合物はＭＯＳへ吸着されたとき酸素併存下においてこれにキャリアたる電子を供与する傾向があるからである。この点において従来のヘリウム及びフレオンガスとのあいだに際立った相異が見られる。【００１４】本考案における諸操作の中には特別な困難性を伴うものは何ら含まれていない。被検容器のチャンバー内への移動、その前又は後に行われる検査用ガス供給源への接続、該移動及び接続のあとでのガス導入、チャンバー内から取出した気体の検査、そのあと必要に応じてのチャンバー内パージ等々はそれ自体全て実施容易であるから、これら諸操作はマイクロコンピュータ制御、シーケンス制御などの方式での自動化が可能である。【００１５】本考案装置を構成する諸要素、つまり検査用ガス供給源、チャンバー、チャンバーからガスセンサーへ至る管路と弁類、被検容器内加圧手段、チャンバー内パージ手段等々は概ね必要に応じ任意に設け製作しうるものであるが、ガス供給源については後述の如く特に配慮がなされている。即ち、上記の低沸点有機化合物を瞬間的に気化させるには、例えば加熱、霧化、又はその双方とが必要である。しかし、被検容器１個又は数個、つまりチャンバー内へ１度に収容される数の被検容器内を該化合物の下方爆発限界（ＬＥＬ）未満の濃度にすればよいのであるから、必ずしも多量の液を瞬間的に気化させるものではなく、例えば内容積５リットルの容器１個についてのエタノール所要量は僅か０．４ｍｌであるに過ぎない。尚、エタノールのＬＥＬは３．５％とされているが、上例の場合の濃度は約３．０％（即ち３０，０００ｐｐｍ）である。【００１６】【考案の効果】以上によって明らかなように、本考案によれば常温で液体の有機化合物が用いられるから、保存・運搬が容易であり、計量などの取扱いも容易、少量の液から大量のガスを調製できるほか、特にエタノールならば無害でがるから作業環境への漏出汚染をそれ程厳重に防止しなくてもすむこと、などからして大規模な実用化に極めて適した方法である。これらの可燃性有機化合物がＭＯＳ型ガスセンサーにより高感度で、例えば空気中に１〜１０ｐｐｍ含有されている程度の低濃度でも検出しうる感度、で検知できるから、被検容器壁部などに存在するごく微小のピンホールであっても迅速確実に検知（但し、それが存在する個所の特定までは含まない）できる。【００１７】これを具体的に例示すると、被検容器（５リットル）とチャンバーとの間の空間の容積：５リットルエタノール含有率３％の空気の漏洩量（＊）：（Ａ）０．５ｍｌ／６ｓｅｃ（Ｂ）５ｍｌ／６０ｓｅｃ上記空間の空気のエタノール濃度：（Ａ）３ｐｐｍ（Ｂ）３０ｐｐｍ（＊）ピンホール径０．０５ｍｍφ、内圧０．１５ｋｇ／ｃｍ²Ｇの前提のものと比較すれば従来公知のガスセンサーでは２０〜３０ｐｐｍが検知下限濃度であるから、検査所要時間は被検容器１個当り少なくとも１分となるに反し、本件出願人の上記先願にかかるセンサーでは３ｐｐｍ程度でも十分に検知できるから所要時間は約６秒ということになる。【００１８】このアルコール敏感性ガスセンサーは第３図に示すように、３ｐｐｍの濃度のエタノール混合気体に遭遇したとき約３０ｍＶの出力電圧を与えるから、このような低濃度のものでも十分正確に検知出来るのである。【００１９】【実施例】以下第１図に示した実施例について本考案の装置を更に詳しく説明する。【００２０】先ず方法について説明すれば、この被検容器１はブリキ板でプレス成形された内容積２０リットルの灯油缶である。この被検容器を内容積３０リットルのチャンバー２へ収納し、検査用ガスの供給源３へ至る管路４を、気密接合部５を介して該缶へ接続する。次いで１．６ｍｌのエタノールを気化させつつ上記管路４から被検容器１へ内圧が０．１５ｋｇ／ｃｍ²Ｇとなるよう圧入する。加圧が終われば、ポンプ６によりチャンバー２内から空気を取出す管路、即ち、空気を吸引し再び該チャンバーへ戻す空気循環経路の空気流通を約３０秒継続する。この管路、即ち、循環経路７にはガスセンサー８が設けてあるので被検容器１からチャンバー２内への検査用ガスの漏洩、つまり該容器のピンホール、の有無が判定できる。【００２１】判定が終われば被検容器１をチャンバー２から取出し、もし「漏洩あり」との判定であった場合にはチャンバー２内の空気を清浄空気でパージすると共に、好ましくは同時に循環経路７及びその中のガスセンサ８の内部も十分にパージする。【００２２】次に装置について補足的に説明する。【００２３】この例では検査用ガス供給源３が、アルコール注入器３ａと、これが接続されている気化器３ｂと、該気化器３ｂへアルコール注入器よりも上流側で接続されているブロワ３ｃと、気化器と管路４との間に介装されたバルブ３ｄとからなる。気化器３ｂは注入器３ａから計量注入されるエタノールを瞬間的に気化されるべく、内部に加熱手段と霧化手段とを備えている。バルブ３ｄは容器１内が所定圧に到達したのちに閉められるものである。【００２４】循環経路７はチャンバー２の上部に配置の複数の吸出口７ａと、下部に配置の複数の吐出口７ｂとを備えている。吸出口７ａとガスセンサー８との間にはバルブ７ｃ，７ｄが、又該センサー下流側のポンプ６と吐出口７ｂとの間には３つのバルブ７ｅ，７ｆ，７ｇが夫々配置されている。上記バルブ７ｄは上側のブロー管９に、バルブ７ｆは下側のブロー管１０に、又バルブ７ｇは新鮮空気取入管１１に夫々設けられている。【００２５】漏洩検査中はこれらバルブ７ｄ，７ｆ，７ｇを閉め、空気を矢印Ｔ，Ｕ，Ｖ，Ｗの如くに循環させるが、漏洩が検出されたときは先ず上方のバルブ７ｃを閉めてバルブ７ｄを開け、下方のバルブ７ｅを閉めバルブ７ｇを開く。これにより空気は矢印Ｚ，Ｗ，Ｔ，Ｘの如くに流れチャンバー２内のパージを行う。このパージが終われば、上方のバルブ７ｄを閉めてバルブ７ｃを開け、下方のバルブ７ｆを開ける。これにより空気は矢印Ｚ，Ｗ，Ｔ，Ｕ，Ｙの如くに流れガスセンサー８内のパージが行われる。パージ終了後は再びバルブ７ｄ，７ｆ，７ｇを閉め、他のバルブ７ｃ，７ｅを開けた状態に復帰させる。【００２６】〔別実施例〕以下に別実施例を説明する。【００２７】〈１〉図中破線で示した貯槽１２は、上記第１の実施例における注入器３ａと気化器３ｂとに代えてこの別実施例で採用されるものである。この貯槽１２には、予め上方爆発限界の濃度１９％以上となるようエタノール空気中又は窒素ガス中で気化させて調製ずみの混合気体、が貯留されるものである。従ってこの場合においては、注入器３ａと気化器３ｂの操作に代え貯槽１２から管路４への接続バルブ（図示せず）を開閉するだけでよい。【００２８】そして、この場合の供給源３がブロワ３ｃと貯槽１２とで構成されているほかは上記第１の実施例と全て同じ要素で当該装置は構成されている。ひとつのチャンバーの中に、多数の被検査容器１を位置させて一挙に多数の被検査容器からの漏洩を検査する良き事、勿論である。【００２９】チャンバーの複数位置から吸出し管を連出させ、これらの管に夫々、吸引機と前記検知器とを介在させこれらを通る気体を各別に、もしくは、合流させた上で、前記チャンバー内へ送り込ませる管を設け、もって、いずれの検知器が早く、もしくは濃く漏洩ガスを検知するかを見ることにより漏洩位置を推定し易くして用いるも良き事勿論である。【００３０】チャンバー内気体強制混合用密閉流路からチャンバー内への吹き込み口の位置を複数個設け、かつ、異なる方向からチャンバー内へ気体を流させる事によって、漏洩ガスが早くチャンバー内に拡散され易くして、いずれの位置から漏洩が生じても、早く、漏洩検知し易からしめて用いるも良き事勿論である。【００３１】第２図に示す如く、チャンバー内気体強制混合用密閉流路途中に強制混気用送風機を介在させ、この送風機より下手側又は上手側に分流バイパス路を設け、この中に検知器を介在させ、送風機よりチャンバー内気体を強力に拡散させ乍ら、検知器に最適の気体を流させて用いると良き事勿論である。【００３２】以上の実施例においては、チャンバー内への漏洩ガスの検知につき記したが、チャンバー内と、被検査容器内とを、逆にして実施するも良き事勿論である。【００３３】被検査容器内へ本考案の検査用気体を圧入、密閉した状態で、第１図、又は、第２図に示すようにチャンバー内へ収容して検査するも良き事勿論である。チャンバー内を大気圧よりも低からしめて検査を行うも良き事勿論である。【００３４】〈２〉第２図の別実施例では、被検容器１がチャンバー２に収納され、その蓋２ａが螺合されるに伴いチャンバー底部へ弾性のパッキング１３を介して押圧されるようになっている。管路７において吸出口７ａとポンプ６とのあいだには四方弁１４が設けられていて、漏洩試験中は破線の如く気体循環、チャンバー内パージのときは実線の如くの弁体位置とされる。そしてセンサー８はポンプ６下流側の第１分路１４ａに絞り１４ｂと直列に配設されこの分路と並列の第２分路１４ｃにも絞り１４ｄが設けられている。第１分路１４ａは主として漏洩試験中に用いられ、容器１の漏洩発見のときには濃厚ガスによるセンサー８の過度の汚染を防ぐべく第２分路１４ｃへ切換えられる。チャンバー２内のパージのときも第２分路１４ｃが主として利用される。絞り１４ｂ，１４ｄは漏洩試験中にも適当量比で両分路１４ａ，１４ｃを併用できるよう流量可変絞りとなっている。【００３５】この構成によれば、第１分路には必要に応じた比較的小流量を、又、第２分路にはそれよりも極めて多い大流量の空気を通すことができ、従ってチャンバー２内の空気を強制撹拌することになり、被検容器１からの漏洩はごく軽微なものであっても確実に検出できるのである。【００３６】本実施例の装置を用いて、容器の漏洩検知を実施するにあたり、前記送風機をもって検査用ガスのパージに用いるも良き事勿論である。実施例の第２図の構造で漏洩検査し、この第２図中の四方弁１４を切換えてパージするも良きものである。【００３７】尚、実用新案登録請求の範囲の項に、図面との対照を便利にするために符号を記すが、該記入により本考案は添付図面の構成に限定されるものではない。【提出日】平成４年１１月２５日【手続補正１】【補正対象書類名】明細書【補正対象項目名】全文【補正方法】変更【補正内容】【考案の詳細な説明】【０００１】【産業上の利用分野】本考案は、周壁、頂・底板などに小孔ないしピンホールが存在することによる内容物漏洩を生じることが好ましくない各種容器、例えば自動車のガソリンタンク、石油ストーブの石油貯槽部、冷房装置、又は、冷凍装置の冷媒貯蔵耐圧容器、高圧ガス容器等、その他種々の容器の漏れを検知するための漏洩検知装置に関し、さらに詳しくは、被検容器を内部に収納自在な密閉チャンバーを設け、前記密閉チャンバー内の前記被検容器に検査用ガスを圧入自在なガス圧入路を設け、前記被検容器に圧入された前記検査用ガスの前記チャンバー内への漏出を検査するガス検知器を設けた容器の漏洩検知装置に関する。【０００２】【従来の技術】従来、この種の容器の漏洩検知装置としては、密閉チャンバー内に収納した被検容器に圧入される検査用ガスを貯蔵したガス貯蔵器を設け、前記密閉チャンバー内の気体を取り出して前記チャンバー内に戻すチャンバー内気体循環用密閉流路を設け、前記被検容器に圧入された前記検査用ガスの前記密閉チャンバー内への漏出を検査するガス検知器を、前記密閉流路に設けてあるものがあった。【０００３】【考案が解決しようとする課題】一般的に、被検容器の漏洩検知は、被検容器に検査用ガスの供給源を接続した状態でチャンバー内へ収納する工程と、上記供給源から上記被検容器内へ検査用ガスを導入すると共に該容器の内圧を所定値にまで高める工程と、次いで、上記チャンバー内部の気体を取出してガス検知器により該気体中の上記検査用ガスの存否を検査する工程と、そのあと上記被検容器を上記チャンバーから取出すと共に、上記工程で検査用ガスの存在が検出された場合に上記チャンバー内の気体をパージしたのち、次の被検容器を受入れる工程とからなる。【０００４】このような容器の漏洩検知においては、対象とする容器の漏洩状態が極めて微量で判別しにくい場合（ガス検知器の感度が低い場合も含む）、例えば、高濃度の検査用ガスを用いることで、微量の検査用ガス漏洩であってもガス検知器で精度よく検知できるようにすることが考えられる。【０００５】しかし、この場合、漏洩した高濃度の検査用ガスが、ガス検知器に直接接触すれば、そのガス検知器が過度に汚染されて、誤動作を生じる危険性があると共に、そのガス検知器の通常動作への復帰に時間がかかり、引続き実施する別の被検容器に対する漏洩検査までのロスタイムが増加し、漏洩検査の効率が悪化する問題点がある。【０００６】上述した従来の容器の漏洩検知装置によれば、通常の漏洩検査の途中に、上記のような特殊な検査を実施するためには、予め、濃度の異なる検査用ガスを各別に収容した複数の貯蔵器を設けておく必要があり、保管上の手間が掛かると共に、余分な保管場所を確保しなければならない欠点がある。【０００７】更に、密閉流路に設けられたガス検知器に対して、被検容器から漏れ出た高濃度の検査用ガスが、直接的に接触する危険性があり、その場合は、上述のようにガス検知器の誤動作が生じ、検査精度が低下したり、検知器復帰のロスタイムにより検査効率が悪化し、検査コストが増大する等の問題を引き起こす欠点がある。【０００８】従って、本考案の目的は、上記欠点に鑑み、微量のガス漏洩であっても効率よく正確に漏洩検知することができ、しかも、検査用ガスに関する保管上の問題が少なく、低コストでの大規模実施が容易な容器の漏洩検知装置を提供するところにある。【０００９】【課題を解決するための手段】この目的を達成するための本考案における容器の漏洩検知装置の特徴構成は、揮発性液体を気化させて検査用ガスを造る気化器と、その気化器で造られた前記検査用ガスを密閉チャンバー内の被検容器に圧入自在な圧入路を通して圧入する圧入装置とを、前記検査用ガスの供給源に設け、前記チャンバー内の気体を送風機を介して取り出して前記チャンバー内に戻すチャンバー内気体循環用密閉流路を設けると共に、前記密閉流路内に、並列に接続された第一分路と第二分路とを設け、前記第一分路に前記ガス検知器を配置し、前記第一・第二分路に、それらの流通気体流量をそれぞれ調整自在な一対の流量調整装置を各別に設けてあるところにある。【００１０】尚、前記揮発性液体がアルコールであり、前記気化器が加熱手段と霧化手段との一方または双方を備えたものであってもよく、更には、前記ガス検知器が、酸化スズ半導体素子にアルカリ土類金属の酸化物を担持させたアルコール敏感性半導体式ガス検知素子を備えたものであってもよい。【００１１】【作用】本考案における容器の漏洩検知装置の特徴構成によれば、揮発性液体を気化させて検査用ガスを造る気化器と、その気化器で造られた前記検査用ガスを密閉チャンバー内の被検容器に圧入自在な圧入路を通して圧入する圧入装置とを、前記検査用ガスの供給源に設けてあるから、従来のように、調製済みの検査用ガスを、その状態で保管しなくても、液体の状態で保管することができ、運搬・計量等の取扱が容易になると共に、少量の液から大量のガスを調製することができるから、省スペース化が可能となる。【００１２】また、必要に応じて、前記液体の気化させる度合を調整することによって、製造する検査用ガスの濃度を変化させることが可能となり、例えば、微量の漏洩状態を検知するような場合に、高濃度の検査用ガスを調製して低感度のガス検知器であっても高精度に検知し易くすることが可能となる。【００１３】また、前記チャンバー内の気体を送風機を介して取り出して前記チャンバー内に戻すチャンバー内気体循環用密閉流路を設けると共に、前記密閉流路内に、並列に接続された第一分路と第二分路とを設け、前記第一分路に前記ガス検知器を配置し、前記第一・第二分路に、それらの流通気体流量をそれぞれ調整自在な一対の流量調整装置を各別に設けてあるから、チャンバーと被検容器との間の気体を前記密閉流路を通して循環させて、何回もガス検知器部分を通過させることが可能となり、例えば、前記気体に前記被検容器から漏れ出た検査用ガスが混ざっている場合でも、何回も続けて検知できるので、検知精度を上げることが可能となる。【００１４】更には、ガス検知器を設けてある第一分路と、第二分路との流通気体流量を個別に調整できるから、前記密閉流路において前記気体を流通させる流路を自由に選択することが可能となる。（第二分路のみ、又は、第一分路のみ、又は、その両分路共）その結果、例えば、高濃度の検査用ガスを用いた漏洩試験中においては、第二分路のみに気体を流通させることによって、第一分路に設けてあるガス検知器への直接的な濃厚ガス接触をなくし、ガス検知器に対する過度の汚染を防ぐことが可能となる。【００１５】一方、第二分路を流通する気体は、高速で循環させることによって撹拌されて、前記気体中のガス濃度を短時間に平均化することができ、その後、前記第一分路を開いて気体を流通させることによって、ガス検知器の過度の汚染のない状態で漏洩検知を実施することができ、微量の漏洩に対しても、短時間で且つ正確に判定することができる。しかも、前記ガス検知器は、検査に伴う過度の汚染を受けてないから、従来のように、通常動作への復帰に長時間を費やす必要がなく、多くの容器に対して連続的に検査を繰り返す上での検知作業の効率が向上し、大量に漏洩検知を実施することが可能となる。【００１６】尚、前記揮発性液体がアルコールであり、前記気化器が加熱手段と霧化手段との一方または双方を備えたものであれば、前記アルコール液を、例えば、加熱したり、又は、霧化させたり、又は、加熱・霧化することによって、気化を促進し、瞬間的に所定濃度の検査用ガスを調製することができ、効率のよい検査用ガス製造が可能となる。この、アルコール液の瞬間的な気化は、必ずしも多量の液を瞬間的に気化させるものではなく、例えば、エタノール液を用いる場合、内容積５リットルの容器１個についてエタノール液を概ね０．４ミリリットル程度使用するだけで通常の漏洩検知に使用可能な検査用ガスが得られ、この場合のガス濃度は約３．０％（即ち３０，０００ｐｐｍ）となり、下方爆発限界（ＬＥＬ）未満の濃度（エタノールのＬＥＬは３．５％）である。但し、ガス濃度は、前述した微量のガス漏洩を検知するような場合には、ＬＥＬを越える濃度まで上げて実施することも可能である。また、前記揮発性液体が、エタノールである場合には、無害であるから、作業環境の漏出汚染を緩和することが可能である。【００１７】また、前記ガス検知器が、従来公知の金属酸化物半導体式ガス検知素子を備えたものであれば、多種にわたる検査用ガスに対しても、検知することが可能で、例えば、前記揮発性液体としては、低級アルカン、低級アルケン、低級アルコール、低級アルキル基からなるケトン及びエーテル等が上げられ、好ましくはペンタン、ヘキサン、ペンテン、ヘキセン、エタノール、メタノール、プロパノール、ブタノール、アセトン、及びエチルエーテル等が上げられる。特に、前記ガス検知器が、酸化スズ半導体素子にアルカリ土類金属の酸化物を担持させたアルコール敏感性半導体式ガス検知素子を備えたものであれば、エタノールに対して好都合に利用でき、そのガス検知素子としては、本出願人の先の出願に係る「アルコール選択性ガス検知素子」（特願昭６１−２３６７３号）が上げられる。この検知素子は、水素（Ｈ₂）、一酸化炭素（ＣＯ）、及びメタン（ＣＨ₄）が混在していてもエタノール等のアルコールのみを極めて高感度で検知することができる。【００１８】上記先願のガス検知素子には加熱用電熱線と検出電極とを備えた３端子〜４端子型のものと、検出電極をもって加熱用電熱線の作用をも兼ねさせる２端子型の、熱線型半導体式のものとがある。この熱線型は、軽量、小型、且つ、ガス吸着及びその定常状態への復帰が速い、つまり応答速度が大である、等々の長所を備えているから、特に本考案での使用に適している。【００１９】【考案の効果】従って、本考案の容器の漏洩検知装置によれば、漏洩状態の如何に係わらず効率よく正確に漏洩検知することができ、しかも、検査用ガスに関する保管上の問題が少なく、低コストでの大規模実施が可能となる。【００２０】【実施例】以下に本考案に係わる容器の漏洩検知装置の一実施例について図によって説明する。【００２１】図１は、実施例の容器の漏洩検知装置を表す概要図であって、その構成は、以下の通りである。【００２２】前記漏洩検知装置は、被検容器１を内部に収納自在な密閉チャンバー２を設け、その密閉チャンバー２内の前記被検容器１に検査用ガスを供給する供給源３を設け、その供給源３と前記被検容器１とを連通させる圧入路４を設け、前記チャンバー２内の気体を送風機６を介して取り出して前記チャンバー２内に戻すチャンバー内気体循環用密閉流路７を設け、前記被検容器１に圧入された前記検査用ガスの前記チャンバー２内への漏出を検査するガス検知器８を設けて構成してある。【００２３】前記被検容器１は、本実施例では、ブリキ板でプレス成形された内容積５リットルの灯油缶で構成してある。【００２４】前記チャンバー２は、内部に前記被検容器１を出し入れするために着脱自在な蓋２ａを設けてあり、チャンバー２の本体に前記蓋２ａを螺合させることによって内容積１０リットルの密閉空間を内部に確保できるように形成してある。また、チャンバー２内に被検容器１を入れた状態で前記蓋２ａを設置すると、被検容器１は、チャンバー２底部の弾性パッキング１３へ押圧され前記圧入路４と気密状態に接合される。【００２５】前記検査用ガス供給源３は、揮発性液体の一例であるエタノールを気化させて検査用ガスを造る気化器３ｂと、前記エタノールを前記気化器３ｂに供給する注入器３ａと、前記気化器３ｂで造られた検査用ガスを前記圧入路４を通して前記被検容器１内に圧入する圧入装置の一例であるブロア３ｃと、前記気化器３ｂと圧入路４との間に介装されたバルブ３ｄとを設けて構成してある。前記気化器３ｂには、注入器３ａから計量注入されるエタノールを瞬間的に気化されるべく、内部に加熱手段と霧化手段とを備えてある。前記バルブ３ｄは、被検容器１内が所定圧に到達したのちに前記圧入路４を閉塞するのに使用することができる。【００２６】前記チャンバー内気体循環用密閉流路７は、チャンバー２の側部に配置の複数の吸出口７ａと、下部に配置の複数の吐出口７ｂとによって、チャンバー２内と連通状態に接続してある。また、前記密閉流路７には、その密閉流路７内に並列に接続された第一分路１４ａと、第二分路１４ｃとを備え、前記第一分路１４ａに前記ガス検知器８を配置し、前記第一・第二分路１４ａ，１４ｃに、それらの流通気体流量をそれぞれ調整自在な一対の流量調整装置の一例である絞り１４ｂ，１４ｄを各別に設けて構成してある。【００２７】更に、吸出口７ａと送風機６との間には四方弁１４が設けられていて、漏洩試験中は破線の如く気体循環、チャンバー２内パージのときは実線の如くの弁体位置とされる。【００２８】前記第一分路１４ａは主として漏洩試験に用いられ、容器１の漏洩発見のときには濃厚ガスによるガス検知器８の過度の汚染を防ぐべく第二分路１４ｃへ切換えられる。チャンバー２内のパージのときも第二分路１４ｃが主として利用される。絞り１４ｂ，１４ｄは漏洩試験中にも適当量比で両分路１４ａ，１４ｃを併用できるよう流量可変絞りとなっている。この構成によれば、第一分路１４ａには、必要に応じた比較的小流量を、又、第二分路１４ｃには、それよりも極めて多い大流量の空気を通すことができ、従って、チャンバー２内の空気を強制攪拌することになり、被検容器１からの漏洩はごく軽微なものであっても確実に検出することができる。【００２９】前記ガス検知器８は、酸化スズ半導体素子にアルカリ土類金属の酸化物を担持させたアルコール敏感性熱線形半導体式ガス検知素子を備えて構成してある。【００３０】本実施例の漏洩検知装置によれば、前記第一分路１４ａの絞り１４ｂを絞った状態で、前記供給源３によって、１．６ミリリットルのエタノールを気化させて調製した検査用ガスを、圧入路４からチャンバー２内の被検容器１に内圧が０．１５ｋｇ／ｃｍ²（ゲージ圧）となるよう圧入し、加圧が終われば、送風機６によりチャンバー２内の気体を前記密閉流路７の第二分路１４ｃを通して約３０秒間循環させ、その後、前記絞り１４ｂを開いて前記気体をガス検知器８に導くことによって、被検容器１からチャンバー２内への検査用ガスの漏洩の有無を判定することができる。【００３１】前記被検容器１内の加圧は、例えば、整髪用・殺虫剤用などのスプレー容器が被検容器である場合には、２〜４ｋｇ／ｃｍ²（絶体圧）、つまりゲージ圧１〜３ｋｇ／ｃｍ²で内容物が充填されているので、被検容器１へ加える内圧もこれを考慮したものとされる。一般的には、ゲージ圧０．１〜０．５ｋｇ／ｃｍ²が適当であり、この加圧と検査用ガスの導入とを同時に行うこともできる。例えば被検容器１へ至る圧入路４の中に適宜の空気圧送用ポンプを設け、該ポンプの吸込側へ気化後ないし気化中の検査用ガス（又は前記液体）を所定量供給すればよい。【００３２】漏洩に関する判定が終われば被検容器１をチャンバー２から取出し、もし「漏洩あり」との判定であった場合にはチャンバー２内の空気を清浄空気でパージすると共に、好ましくは同時に密閉流路７及びその中のガス検知器８の内部も十分にパージすることによって、残存する検査用ガスによる次検査への悪影響発生を防止することが可能となる。【００３３】因に、本実施例のガス検知器８（前記アルコール敏感性熱線型半導体式ガス検知素子を備えたもの）によれば、例えば、空気中に前記検査用ガスが１〜１０ｐｐｍ含有されている程度の低濃度でも検出しうる感度があり、被検容器壁部などに存在するごく微小のピンホールであっても迅速確実に検知（但し、それが存在する個所の特定までは含まない）できるものであるが、これを具体的に例示すると、被検容器（５リットル）とチャンバーとの間の空間の容積：５リットルエタノール含有率３％の空気の漏洩量（＊）：（Ａ）０．５ミリリットル／６ｓｅｃ（Ｂ）５ミリリットル／６０ｓｅｃ上記空間の空気のエタノール濃度：（Ａ）３ｐｐｍ（Ｂ）３０ｐｐｍ従来公知のガス検知器では検知下限ガス濃度が２０〜３０ｐｐｍであるから、上述の（Ｂ）の場合しか検知することができず、しかも、その検査所要時間は、被検容器１個当り少なくとも１分となるのに対して、本実施例のガス検知器８では、３ｐｐｍ程度でも十分に検知できるから、上述の（Ａ）・（Ｂ）何れの場合も漏洩を検知することが可能で、所要時間は約６秒ということになる。【００３４】前記アルコール敏感性熱線型半導体式ガス検知素子は図２に示すように、３ｐｐｍの濃度のエタノール混合気体に遭遇したとき約３０ｍＶの出力電圧を与えるから、このような低濃度のものでも十分正確に検知出来るのである。【００３５】〔別実施例〕以下に別実施例を説明する。【００３６】〈１〉前記供給源３は、先の実施例における注入器３ａと気化器３ｂとに替えて、予め上方爆発限界の濃度１９％以上となるようエタノール空気中又は窒素ガス中で気化させて調製ずみの混合気体が貯留された貯槽を設けるものでもよく、この場合においては、注入器３ａと気化器３ｂの操作に代え貯槽から管路４への接続バルブ（図示せず）を開閉するだけでよい。又、前記貯槽を、先の実施例に追加する形で供給源３を構成するものであってもよい。即ち、本考案の漏洩検知装置で用いられる検査用ガス供給源３は、エタノール等の液状可燃性有機化合物を実質上瞬間的に気化させる方式のもの、又は、予め気化されたエタノール等の化合物の蒸気を所定濃度で含有している混合気体の貯槽を備えた方式のもの、あるいはその両者を併せ備えた方式のもののいずれであってもよい。【００３７】〈２〉前記被検容器１は、先の実施例で説明した灯油缶以外にも、多種のものが適応でき、更には、チャンバー２の中に、多数の被検容器１を位置させて一挙に多数の被検容器１からの漏洩を検査することも可能である。【００３８】〈３〉チャンバー１の複数位置から吸出管７ａを連出させ、これらの管に夫々、吸引機と前記ガス検知器８とを介在させ、これらを通る気体を各別に、もしくは、合流させた上で、前記チャンバー２内へ送り込ませる管を設ける構成をとってもよく、そうすることによって、いずれのガス検知器が早く、もしくは濃く漏洩ガスを検知するかを見ることにより、漏洩位置を推定し易くすることが可能となる。また、チャンバー内気体循環用密閉流路７からチャンバー２内への吐出口７ｂの位置を、複数個設け、かつ、異なる方向からチャンバー２内へ気体を吹き出させるように構成すものであってもよく、そうすることによって、漏洩ガスが早くチャンバー２内に拡散され易くして、いずれの位置から漏洩が生じても、早く、漏洩検知を行うことが可能となる。更には、チャンバー２内と、被検容器１内とを、逆にして実施できるように各々を構成するものであってもよい。また、被検容器１内へ予め検査用ガスを圧入、密閉しておいた状態で、チャンバー２内へ収容して検査することも可能である。一方、前記チャンバー２内を、大気圧よりも低からしめて検査を行うことも可能である。【００３９】〈４〉本考案における漏洩検知装置は、その諸操作を、例えば、マイクロコンピュータ制御、シーケンス制御などの方式での自動化が可能である。【００４０】尚、実用新案登録請求の範囲の項に、図面との対照を便利にするために符号を記すが、該記入により本考案は添付図面の構成に限定されるものではない。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various containers in which it is not preferable to leak contents due to the presence of small holes or pinholes in the peripheral wall, top / bottom plate, etc. For example, a leak detection device for detecting a leak in various containers such as a gasoline tank of an automobile, an oil storage tank portion of an oil stove, a cooling device, a refrigerant storage pressure container of a refrigeration device, a high pressure gas container, and the like, and more specifically, The present invention relates to a device for introducing and pressurizing a gas that can be detected by a gas sensor into a test container and detecting with the sensor whether or not the gas leaks to the outside of the container. 2. Description of the Related Art Proposals for using non-combustible helium as a gas to be injected into a test container and proposals for using non-combustible Freon gas have been already made and have been put to practical use to some extent. As a gas sensor when helium is used, there is one that utilizes the fact that its thermal conductivity is higher than that of other gases (excluding hydrogen). Further, when the Freon gas is used, an expensive gas sensor of the FID method, that is, the ionized hydrogen flame method is used. Since helium is not flammable, it has the advantage of being safe and easily passing through small holes, but its sensor has sensitivity problems. Further, since the helium and most of the Freon gas are gases at room temperature, they must be stored in a liquid state under high pressure in a legal internal pressure container, which causes various problems in terms of safety and cost. Helium is harmless, but it is impossible to release a large amount of freon gas into the work environment and the atmosphere, and the leak detection device has a drawback that it is complicated and expensive. As described above, the conventional proposals have various inconveniences in terms of the gas sensitivity of the sensor, the storage and handling of the inspection gas, and the like. In view of this situation, an object of the present invention is to adopt an inspection gas capable of high-sensitivity detection using any of various gas sensors already developed by the applicant of the present invention or one that is widely used, Based on this, it is an object of the invention to provide a leak detection device that is easy to implement on a large scale at a low cost with a new, rational process. Means for Solving the Problems To achieve this object, the leak detection device for a container according to the present invention is characterized by a vaporizer for vaporizing a volatile liquid to produce an inspection gas and its vaporization. And a press-fitting device for press-fitting the test gas made by a pressure vessel into a test container in a closed chamber through a press-fitting passage that can be press-fitted, and providing the test gas supply source with the gas in the chamber through a blower. The first channel and the second channel are connected in parallel in the hermetically sealed channel, and the first channel and the second channel are connected to each other in parallel. The gas detector is disposed in the first and second shunts, and a pair of flow rate adjusting devices capable of adjusting the flow rates of the flowing gases are separately provided in the first and second shunts. The volatile liquid may be alcohol, the vaporizer may include one or both of a heating unit and an atomizing unit, and the gas detector may be tin oxide. An alcohol-sensitive hot-wire semiconductor gas sensor in which an oxide of an alkaline earth metal is supported on a semiconductor element may be used. According to the present invention, a step of accommodating a test gas supply source in the chamber with the test gas supply source connected to the test container, and introducing the test gas from the supply source into the test container and A step of increasing the internal pressure of the container to a predetermined value, a step of taking out the gas inside the chamber and inspecting the presence or absence of the inspection gas in the gas by a gas sensor, and then setting the inspection container to the chamber In addition to the above, the inspection gas is purged in the chamber when the presence of the inspection gas is detected in the above process, and then the next container to be inspected is received. Is a mixed gas containing a vapor of a low boiling point, low toxicity, flammable organic compound that is liquid at room temperature at a concentration below its lower explosion limit, and the gas sensor described above A device characterized by being capable of sensitive detection, comprising a supply source of an inspection gas, a chamber for accommodating an inspection container in a state connected to the supply source, and an internal pressure of the inspection container. In the container leakage detection device, the container leak detection device is provided with: a means for increasing the internal pressure of the chamber; a pipeline for removing the gas inside the chamber; a gas sensor connected to the pipeline; and a means for purging the gas in the chamber. The source of the working gas is a source of a mixed gas containing a vapor of a low boiling point and low toxicity combustible organic compound that is liquid at room temperature, and the gas sensor can detect the organic compound sensitively. An apparatus is provided. [0008] In the above, the pressure inside the container to be inspected after introducing the inspection gas is an absolute body pressure of 1.1 to 1.5 kg / cm. ² (Gauge pressure 0.1-0.5 kg / cm ² ) Is suitable, and the pressurization and the introduction of the inspection gas can be performed simultaneously. For example, an appropriate pneumatic pump may be provided in the conduit leading to the container, and a predetermined amount of the vaporized or vaporized compound may be supplied to the suction side of the pump. 2 to 4 kg / cm in the case of a spray container for hair styling, insecticide, etc. ² (Absolute pressure), that is, gauge pressure 1 to 3 kg / cm ² Since the contents are filled in, the internal pressure applied to the test container is also taken into consideration. The flammable organic compound that is liquid at room temperature and has a low boiling point and low toxicity used in this apparatus is selected from lower alkanes, lower alkenes, lower alcohols, ketones and ethers composed of lower alkyl groups, preferably pentane and hexane. , Pentene, hexene, methanol, propanol, butanol, acetone, and ethyl ether, and more preferably ethanol. When ethanol is selected, in addition to the conventionally known alcohol-sensitive gas sensor, the “alcohol-selective gas detection element” (Japanese Patent Application No. 61-23673) of the applicant's earlier application is particularly convenient. It is one of the available ones. This sensing element is hydrogen (H ₂ ), Carbon monoxide (CO), and methane (CH _Four ) Is mixed, it has a very unique structure of detecting only alcohol such as ethanol with high sensitivity. The main component of the device is tin oxide, on which an oxide of alkaline earth metal is supported. Metal oxide semiconductor (MOS). The gas source for inspection used in the device of the present invention is of a type in which a liquid combustible organic compound such as ethanol is vaporized substantially instantaneously, or vapor of a compound such as ethanol which has been vaporized in advance is vaporized. It may be either a system provided with a storage tank for a mixed gas containing a predetermined concentration or a system provided with both of them. The above-mentioned organic compound for preparing an inspection gas according to the present invention is not only a “gas detection element” of the above-mentioned prior application, but is generally highly sensitive by a gas sensor using a metal oxide semiconductor (MOS). Detected by. These gas sensors are roughly classified according to the detection principle. In addition to the above-described one that detects a change in thermal conductivity, there is one that utilizes the fact that the conductivity of the MOS changes due to adsorption to the MOS. Among the latter type of gas sensor, there are a three-terminal to four-terminal type having a heating wire for heating and a detection electrode, and a two-terminal type having the detection electrode also serving as the heating electrode wire. , There is a hot wire semiconductor type. This hot wire type has advantages such as light weight, small size, fast gas adsorption and quick return to a steady state, that is, high response speed, as already proposed by the applicant of the present invention. Suitable for use in the present invention. The latter gas sensor is particularly suitable for the detection of organic compounds in the present invention. This is because these compounds tend to donate electrons as carriers to oxygen under the coexistence of oxygen when adsorbed on MOS. In this respect, there is a marked difference between the conventional helium and freon gas. The operations in the present invention do not include anything with special difficulty. Moving the container to be inspected into the chamber, connecting to the inspection gas supply source before or after that, introducing gas after the moving and connecting, inspecting the gas taken out from the chamber, and then if necessary Since the internal purging of chambers and the like are all easy to carry out, these operations can be automated by methods such as microcomputer control and sequence control. The elements constituting the device of the present invention, that is, the inspection gas supply source, the chamber, the conduits and valves from the chamber to the gas sensor, the in-container pressurizing means, the in-chamber purging means, etc. are generally required. However, the gas supply source is given special consideration as described later. That is, in order to instantaneously vaporize the low boiling point organic compound, for example, heating, atomization, or both of them are required. However, one or several test containers, that is, the number of test containers accommodated in the chamber at one time may be adjusted to a concentration below the lower explosion limit (LEL) of the compound, and therefore a large amount is not necessarily required. Is not instantaneously vaporized, and the ethanol requirement for a container having an internal volume of 5 liters is only 0.4 ml. The LEL of ethanol is 3.5%, but the concentration in the case of the above example is about 3.0% (that is, 30,000 ppm). As is clear from the above, according to the present invention, since an organic compound that is liquid at room temperature is used, it is easy to store and transport, it is easy to handle such as measuring, and it is possible to use a small amount of liquid. In addition to being able to prepare a large amount of gas, ethanol is particularly harmless, so it is not necessary to strictly prevent leaking contamination into the work environment. is there. Since these combustible organic compounds can be detected with high sensitivity by a MOS type gas sensor, for example, with a sensitivity that can be detected even at a low concentration of 1 to 10 ppm in the air, they are present on the wall of the container to be inspected. Even very small pinholes can be detected quickly and reliably (however, it does not include identification of the location where they exist). As a specific example, the volume of the space between the test container (5 liters) and the chamber: 5 liters The amount of leakage of air with an ethanol content of 3% (*): (A) 0.5 ml / 6sec (B) 5ml / 60sec Ethanol concentration of air in the above space: (A) 3ppm (B) 30ppm (*) Pinhole diameter 0.05mmφ, internal pressure 0.15kg / cm ² Compared with the premise of G, the conventionally known gas sensor has a detection lower limit concentration of 20 to 30 ppm, so that the time required for inspection is at least 1 minute per container to be inspected, but the above-mentioned point of the applicant With the desired sensor, the required time is about 6 seconds because it can detect even about 3 ppm. As shown in FIG. 3, this alcohol-sensitive gas sensor gives an output voltage of about 30 mV when it encounters an ethanol mixed gas with a concentration of 3 ppm. You can do it. EXAMPLE The apparatus of the present invention will be described in more detail with reference to the example shown in FIG. First, the method will be described. The test container 1 is a kerosene can having an internal volume of 20 liters, which is press-molded with a tin plate. The test container is housed in a chamber 2 having an internal volume of 30 liters, and a pipe line 4 leading to a supply source 3 of the test gas is connected to the can via an airtight joint 5. Then, while vaporizing 1.6 ml of ethanol, an internal pressure of 0.15 kg / cm is applied from the conduit 4 to the test container 1. ² Press in so that it becomes G. When the pressurization is finished, the air flow in the pipe for taking out the air from the chamber 2 by the pump 6, that is, the air circulation path for sucking the air and returning it to the chamber again is continued for about 30 seconds. Since the gas sensor 8 is provided in this pipeline, that is, the circulation path 7, it is possible to determine whether or not the inspection gas leaks from the container 1 to be inspected into the chamber 2, that is, the pinhole of the container. When the determination is completed, the container 1 to be inspected is taken out from the chamber 2, and if it is determined that there is “leakage”, the air in the chamber 2 is purged with clean air, and at the same time, preferably the circulation path 7 Also, the inside of the gas sensor 8 therein is sufficiently purged. Next, the device will be supplementarily described. In this example, the inspection gas supply source 3 is an alcohol injector 3a, a vaporizer 3b connected to the alcohol injector 3a, and a blower 3c connected to the vaporizer 3b on the upstream side of the alcohol injector. , A valve 3d interposed between the vaporizer and the conduit 4. The vaporizer 3b has a heating means and an atomizing means inside so as to instantaneously vaporize the ethanol metered from the injector 3a. The valve 3d is closed after the inside of the container 1 reaches a predetermined pressure. The circulation path 7 includes a plurality of suction ports 7 a arranged in the upper part of the chamber 2 and a plurality of discharge ports 7 b arranged in the lower part. Valves 7c and 7d are arranged between the suction port 7a and the gas sensor 8, and three valves 7e, 7f and 7g are arranged between the pump 6 and the discharge port 7b on the downstream side of the sensor. The valve 7d is provided in the upper blow pipe 9, the valve 7f is provided in the lower blow pipe 10, and the valve 7g is provided in the fresh air intake pipe 11 respectively. During the leakage inspection, these valves 7d, 7f and 7g are closed and air is circulated as shown by arrows T, U, V and W. When leakage is detected, the upper valve 7c is first closed. 7d is opened, the lower valve 7e is closed, and the valve 7g is opened. As a result, the air flows as indicated by arrows Z, W, T, and X to purge the inside of the chamber 2. When this purging is completed, the upper valve 7d is closed, the valve 7c is opened, and the lower valve 7f is opened. As a result, the air flows as indicated by arrows Z, W, T, U, and Y, and the gas sensor 8 is purged. After the purging is completed, the valves 7d, 7f and 7g are closed again, and the other valves 7c and 7e are returned to the opened state. Another Embodiment Another embodiment will be described below. <1> The storage tank 12 shown by a broken line in the figure is adopted in this other embodiment in place of the injector 3a and the vaporizer 3b in the first embodiment. In this storage tank 12, a prepared mixed gas which is vaporized in ethanol air or nitrogen gas so as to have a concentration of 19% or more at an upper explosion limit is stored in advance. Therefore, in this case, instead of operating the injector 3a and the vaporizer 3b, it suffices to open and close a connection valve (not shown) from the storage tank 12 to the pipe line 4. In this case, the apparatus is composed of all the same elements as in the first embodiment except that the supply source 3 is composed of the blower 3c and the storage tank 12. Of course, it is a good thing to locate a large number of containers 1 to be inspected in one chamber and inspect for leakage from a large number of containers to be inspected at once. Suction pipes are continuously provided from a plurality of positions in the chamber, and a suction device and the detector are respectively interposed in these pipes, and gas passing therethrough is separately or merged, and then, in the chamber. It is of course a good idea to provide a pipe that feeds the leaked gas into the pipe and to easily estimate the leaked position by checking which detector detects the leaked gas quickly or densely. By providing a plurality of positions of blowing ports from the closed channel for forced mixing of gas in the chamber into the chamber and causing the gas to flow into the chamber from different directions, the leaked gas is quickly diffused into the chamber. Of course, it is a good idea to make it easier to detect leaks from any position and to easily detect leaks. As shown in FIG. 2, a forced air-mixing blower is interposed in the closed channel for forced mixing of gas in the chamber, and a diversion bypass is provided on the lower side or the upper side of the blower, and the detector is provided therein. It is of course a good idea to use an intermediary of an air blower to strongly diffuse the gas in the chamber from the blower, and to use an optimum gas flow to the detector. In the above embodiments, the detection of leaked gas into the chamber is described, but it is of course a matter of course that the inside of the chamber and the inside of the container to be inspected are reversed. It is a matter of course that the inspection gas of the present invention is housed in the chamber as shown in FIG. 1 or FIG. Of course, it is also good to carry out the inspection by keeping the chamber pressure lower than atmospheric pressure. <2> In another embodiment shown in FIG. 2, the container 1 to be inspected is housed in the chamber 2, and the lid 2a thereof is screwed into the chamber so that it is pressed against the bottom of the chamber via the elastic packing 13. It has become. A four-way valve 14 is provided between the suction port 7a and the pump 6 in the pipe line 7, and gas is circulated as indicated by the broken line during the leak test, and the valve position is indicated as indicated by the solid line during purging in the chamber. .. The sensor 8 is arranged in series with the throttle 14b in the first shunt 14a on the downstream side of the pump 6, and the throttle 14d is also provided in the second shunt 14c in parallel with this shunt. The first shunt 14a is mainly used during the leak test, and when a leak of the container 1 is found, it is switched to the second shunt 14c to prevent excessive contamination of the sensor 8 by the rich gas. The second shunt 14c is mainly used when purging the chamber 2. The throttles 14b and 14d are variable flow throttles so that both the shunts 14a and 14c can be used together at an appropriate ratio even during the leak test. With this configuration, it is possible to pass a relatively small flow rate of air to the first shunt and a much larger flow rate of air to the second shunt, so that the chamber can have a larger flow rate. The air in 2 is forcibly agitated, and even if the leak from the container 1 to be inspected is very slight, it can be reliably detected. When carrying out leak detection of the container using the apparatus of this embodiment, it is of course good to use the blower for purging the inspection gas. It is also a good idea to perform a leak test with the structure of FIG. 2 of the embodiment and switch the four-way valve 14 in FIG. 2 to purge. In the claims of utility model registration, reference numerals are given for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the accompanying drawings by the entry. [Date of submission] November 25, 1992 [Procedure Amendment 1] [Name of document to be amended] Specification [Name of item to be amended] Full text [Amendment method] Change [Amendment content] [Detailed description of device] [0001] [Industrial application] The present invention is directed to various containers in which it is not preferable to leak contents due to the presence of small holes or pinholes in the peripheral wall, top / bottom plate, etc., such as automobile gasoline tanks and petroleum stove oil. The present invention relates to a leak detection device for detecting a leak in a storage tank part, a cooling device, a refrigerant storage pressure container of a refrigerating device, a high-pressure gas container, and other various containers. A closed chamber is provided, and a gas pressurizing passage is provided in which the inspection gas can be press-fitted into the test container in the closed chamber, and the test gas press-fitted into the test container leaks into the chamber. It relates leakage detection device of a container provided with a gas detector to inspect. 2. Description of the Related Art Conventionally, as a leak detection device for a container of this type, a gas storage device for storing an inspection gas to be press-fitted into a test container housed in a sealed chamber is provided, and A gas detector for inspecting the leakage of the inspection gas press-fitted into the container to be inspected into the closed chamber by providing a closed chamber gas circulation closed flow path for taking out the gas and returning it into the chamber, Some were provided in closed channels. Generally, the detection of leakage of a container to be inspected is carried out by storing the inspection gas in a chamber with the supply source of the inspection gas connected to the container and the above-mentioned supply source. From the step of introducing the inspection gas into the container to be tested from the above and increasing the internal pressure of the container to a predetermined value, then, taking out the gas inside the chamber and detecting the gas for inspection in the gas by a gas detector. The step of inspecting the presence and absence, and then taking out the test container from the chamber, after purging the gas in the chamber when the presence of the inspection gas is detected in the process, the next test container The process consists of receiving. In such leak detection of a container, when the leak state of the target container is extremely small and difficult to determine (including the case where the sensitivity of the gas detector is low), for example, a high concentration inspection gas is used. By using it, it may be possible to accurately detect even a small amount of inspection gas leakage with a gas detector. However, in this case, if the leaked high-concentration inspection gas comes into direct contact with the gas detector, there is a risk that the gas detector will be excessively contaminated, causing malfunction, and the gas detection There is a problem that it takes time to restore the normal operation of the container, and the loss time until the leakage inspection for another container to be inspected is increased, which deteriorates the efficiency of the leakage inspection. According to the conventional leak detection device for a container described above, in order to perform the above-mentioned special inspection during the normal leak inspection, the inspection gases having different concentrations are separately stored in advance. It is necessary to provide a plurality of storage devices described above, which is troublesome in storage and has the disadvantage that an extra storage space must be secured. Further, there is a risk that the high-concentration inspection gas leaked from the container to be inspected may directly come into contact with the gas detector provided in the closed flow path. As described above, the gas detector malfunctions, the inspection accuracy is deteriorated, and the inspection efficiency is deteriorated due to the detector recovery loss time, resulting in an increase in inspection cost. Therefore, in view of the above-mentioned drawbacks, an object of the present invention is to enable efficient and accurate leak detection even with a small amount of gas leak, and to reduce the storage problems relating to the inspection gas and to reduce the cost. It provides a container leak detection device that can be easily implemented on a large scale. Means for Solving the Problems To achieve this object, the container leak detection device according to the present invention is characterized by a vaporizer for vaporizing a volatile liquid to produce an inspection gas and its vaporization. And a press-fitting device for press-fitting the test gas made by a pressure vessel into a test container in a closed chamber through a press-fitting passage that can be press-fitted, and providing the test gas supply source with the gas in the chamber through a blower. The first channel and the second channel are connected in parallel in the hermetically sealed channel, and the first channel and the second channel are connected to each other in parallel. The gas detector is disposed in the first and second shunts, and a pair of flow rate adjusting devices capable of adjusting the flow rates of the flowing gases are separately provided in the first and second shunts. The volatile liquid may be alcohol, the vaporizer may include one or both of a heating unit and an atomizing unit, and the gas detector may be tin oxide. The semiconductor element may be equipped with an alcohol-sensitive semiconductor gas detection element in which an oxide of an alkaline earth metal is supported. According to the characteristic configuration of the container leak detection device according to the present invention, a vaporizer for vaporizing a volatile liquid to produce an inspection gas, and a sealing for the inspection gas produced by the vaporizer. Since a press-fitting device for press-fitting into the test container in the chamber through a press-fitting passage that can be press-fitted is provided at the supply source of the test gas, the prepared test gas is stored in that state as in the past. Even if it is not necessary, it can be stored in a liquid state, handling such as transportation and measurement is easy, and a large amount of gas can be prepared from a small amount of liquid, thus saving space. Further, if necessary, the concentration of the test gas to be manufactured can be changed by adjusting the degree of vaporization of the liquid. For example, in the case of detecting a slight leak state. Thus, it becomes possible to prepare a high-concentration inspection gas to facilitate high-precision detection even with a low-sensitivity gas detector. [0013] Further, a closed channel for circulating gas in the chamber is provided to take out the gas in the chamber via a blower and return it into the chamber, and a first branch line connected in parallel in the closed channel. And a second branch are provided, the gas detector is arranged in the first branch, and a pair of flow rate adjusting devices capable of adjusting respective flow rates of the flowing gases are respectively provided in the first and second branches. Since it is separately provided, it becomes possible to circulate the gas between the chamber and the test container through the closed flow passage and pass the gas detector portion many times. Even if the inspection gas leaked from the gas is mixed, it can be detected many times in succession, so that the detection accuracy can be improved. Furthermore, since the flow gas flow rates of the first shunt provided with the gas detector and the second shunt can be adjusted individually, the flow passage through which the gas flows can be freely set in the closed flow passage. It becomes possible to select. (Only the second shunt, or only the first shunt, or both shunts) As a result, for example, during a leakage test using a high-concentration test gas, only the second shunt is gas. By making the gas flow through, it is possible to eliminate direct concentrated gas contact with the gas detector provided in the first shunt and prevent excessive contamination of the gas detector. On the other hand, the gas flowing through the second shunt is agitated by being circulated at a high speed, and the gas concentration in the gas can be averaged in a short time, and then the first shunt is shunted. By opening and allowing the gas to flow, leak detection can be performed without excessive contamination of the gas detector, and even a small amount of leak can be accurately determined in a short time. Moreover, since the gas detector is not subjected to excessive contamination due to inspection, it is not necessary to spend a long time to return to normal operation as in the conventional case, and many containers can be inspected continuously. The efficiency of the detection work in repeating is improved, and it becomes possible to detect a large amount of leaks. If the volatile liquid is alcohol and the vaporizer includes one or both of a heating unit and an atomizing unit, the alcohol liquid is heated, for example, or By atomizing or heating / atomizing, the vaporization can be promoted, and the inspection gas having a predetermined concentration can be instantaneously prepared, and the inspection gas can be efficiently produced. This momentary vaporization of the alcohol liquid does not necessarily vaporize a large amount of liquid instantaneously. For example, when an ethanol liquid is used, about 0.4 milliliters of the ethanol liquid is used for one container having an internal volume of 5 liters. A gas for inspection that can be used for normal leak detection can be obtained only by using the gas for about 3.0% (that is, 30,000 ppm), and the concentration below the lower explosion limit (LEL) (ethanol). LEL is 3.5%). However, the gas concentration can be increased to a level exceeding LEL in the case of detecting the minute amount of gas leakage described above. Further, when the volatile liquid is ethanol, it is harmless, so that it is possible to mitigate leakage pollution of the work environment. Further, if the gas detector includes a conventionally known metal oxide semiconductor type gas detection element, it is possible to detect a wide variety of inspection gases. Examples of the volatile liquid include lower alkanes, lower alkenes, lower alcohols, ketones and ethers composed of lower alkyl groups, preferably pentane, hexane, pentene, hexene, ethanol, methanol, propanol, butanol, acetone, and ethyl. Ether etc. can be raised. In particular, if the gas detector is equipped with an alcohol-sensitive semiconductor gas detection element in which an oxide of an alkaline earth metal is supported on a tin oxide semiconductor element, it can be conveniently used for ethanol. As an example of the gas detection element, an “alcohol selective gas detection element” (Japanese Patent Application No. 61-23673) of the applicant's earlier application can be cited. This sensing element is hydrogen (H ₂ ), Carbon monoxide (CO), and methane (CH _Four ) Is mixed, only alcohol such as ethanol can be detected with extremely high sensitivity. The gas detection element of the above-mentioned prior application is of a three-terminal to four-terminal type having a heating wire for heating and a detection electrode, and a two-terminal type having the detection electrode also serving as the heating wire for heating. , There is a hot wire semiconductor type. This hot wire type is particularly suitable for use in the present invention because of its advantages such as light weight, small size, fast gas adsorption and quick return to its steady state, that is, high response speed. .. Therefore, according to the leakage detection device for a container of the present invention, it is possible to detect leakage efficiently and accurately regardless of the leakage state, and there is a storage problem regarding the inspection gas. It is possible to carry out large-scale implementation with low cost and low cost. Embodiment An embodiment of a container leak detection device according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing a leak detection device for a container according to an embodiment, and its configuration is as follows. The leak detection device is provided with a closed chamber 2 capable of accommodating the test container 1 therein, and a supply source 3 for supplying a test gas to the test container 1 in the closed chamber 2. Provided is a press-in passage 4 for communicating the supply source 3 with the test container 1, and a closed channel 7 for circulating gas in the chamber is provided to take out the gas in the chamber 2 through the blower 6 and return it into the chamber 2. A gas detector 8 for inspecting leakage of the inspection gas press-fitted into the inspection container 1 into the chamber 2 is provided. In the present embodiment, the test container 1 is formed by a kerosene can having an internal volume of 5 liters, which is press-molded with a tin plate. The chamber 2 is provided with a detachable lid 2a for loading and unloading the container 1 to be inspected, and the lid of the chamber 2 is screwed into the main body of the chamber 2 to hermetically seal the inner volume of 10 liters. It is formed so that a space can be secured inside. When the lid 2a is installed with the container 1 to be inspected inside the chamber 2, the container 1 to be inspected is pressed against the elastic packing 13 at the bottom of the chamber 2 and joined to the press-fitting path 4 in an airtight state. The inspection gas supply source 3 includes a vaporizer 3b that vaporizes ethanol, which is an example of a volatile liquid, to produce an inspection gas, an injector 3a that supplies the ethanol to the vaporizer 3b, and the injector 3a. A blower 3c, which is an example of a press-fitting device for press-fitting the inspection gas produced by the vaporizer 3b into the test container 1 through the press-fitting passage 4, and the vaporizer 3b and the press-fitting passage 4 are interposed. And a valve 3d. The vaporizer 3b is internally provided with a heating means and an atomizing means in order to instantaneously vaporize the ethanol metered from the injector 3a. The valve 3d can be used to close the press-fitting path 4 after the inside of the container 1 to be tested reaches a predetermined pressure. The in-chamber gas circulation closed channel 7 is connected to the inside of the chamber 2 by a plurality of suction ports 7 a arranged on the side of the chamber 2 and a plurality of discharge ports 7 b arranged on the lower side. I am doing it. Further, the closed channel 7 is provided with a first branch 14a and a second branch 14c connected in parallel in the closed channel 7, and the gas detector 8 is provided in the first branch 14a. The first and second shunts 14a and 14c are separately provided with throttles 14b and 14d, which are examples of a pair of flow rate adjusting devices capable of adjusting the flow rates of the flowing gases. Further, a four-way valve 14 is provided between the suction port 7a and the blower 6, and the gas circulation is performed as shown by the broken line during the leak test, and the valve position is shown as the solid line during the purging inside the chamber 2. To be done. The first shunt 14a is mainly used for a leak test, and when a leak of the container 1 is detected, it is switched to the second shunt 14c in order to prevent excessive contamination of the gas detector 8 by the rich gas. The second shunt 14c is mainly used also when purging the chamber 2. The throttles 14b and 14d are variable flow throttles so that both the shunts 14a and 14c can be used together at an appropriate ratio even during the leak test. According to this configuration, a relatively small flow rate as needed can be passed through the first branch 14a, and a significantly larger flow rate than that can be passed through the second branch 14c. Since the air in the chamber 2 is forcibly stirred, even if the leakage from the container 1 to be inspected is very slight, it can be reliably detected. The gas detector 8 comprises an alcohol sensitive thermo-linear semiconductor type gas detecting element in which an oxide of an alkaline earth metal is carried on a tin oxide semiconductor element. According to the leak detection apparatus of the present embodiment, the inspection gas prepared by vaporizing 1.6 ml of ethanol by the supply source 3 with the throttle 14b of the first shunt 14a being throttled. From the pressurizing passage 4 to the container 1 to be tested in the chamber 2 with an internal pressure of 0. 15 kg / cm ² When the pressure is adjusted to (gauge pressure) and the pressurization is finished, the gas in the chamber 2 is circulated by the blower 6 through the second branch 14c of the closed channel 7 for about 30 seconds, and then the throttle 14b is opened. By introducing the gas to the gas detector 8 by means of the gas, it is possible to determine whether or not the inspection gas leaks from the container 1 to be inspected into the chamber 2. The pressurization inside the test container 1 is, for example, 2 to 4 kg / cm when a spray container for hair styling, insecticide, etc. is the test container. ² (Absolute pressure), that is, gauge pressure 1-3 kg / cm ² Since the contents are filled in, the internal pressure applied to the test container 1 is also taken into consideration. Generally, gauge pressure 0.1 to 0.5 kg / cm ² Is suitable, and the pressurization and the introduction of the inspection gas can be performed simultaneously. For example, an appropriate pneumatic pump may be provided in the press-in passage 4 reaching the container 1 to be inspected, and a predetermined amount of the test gas (or the liquid) after vaporization or during vaporization may be supplied to the suction side of the pump. When the determination regarding leakage is completed, the container 1 to be inspected is taken out from the chamber 2, and if it is determined that there is “leakage”, the air in the chamber 2 is purged with clean air, and at the same time, preferably closed at the same time. By sufficiently purging the inside of the flow path 7 and the gas detector 8 therein, it is possible to prevent the remaining inspection gas from adversely affecting the next inspection. By the way, according to the gas detector 8 of the present embodiment (provided with the alcohol sensitive hot-wire type semiconductor gas detector), for example, the inspection gas contains 1 to 10 ppm in the air. It has a sensitivity that can detect even low concentrations such as the above, and it can detect even minute pinholes existing on the wall of the container to be tested quickly and reliably (however, including the identification of the location where it exists) However, if this is specifically exemplified, the volume of the space between the test container (5 liters) and the chamber: 5 liters The amount of air leakage with an ethanol content of 3% (*): ( A) 0.5 ml / 6 sec (B) 5 ml / 60 sec Ethanol concentration of air in the space: (A) 3 ppm (B) 30 ppm In the conventionally known gas detector, the lower detection limit gas concentration is 20 to 30. Since it is ppm, it can be detected only in the case of (B) described above, and the time required for the inspection is at least 1 minute for each container to be inspected, whereas the gas detection of this embodiment is performed. Since the container 8 can sufficiently detect even about 3 ppm, the leakage can be detected in any of the cases (A) and (B) described above, and the required time is about 6 seconds. As shown in FIG. 2, the alcohol-sensitive hot-wire semiconductor type gas sensing element provides an output voltage of about 30 mV when it encounters an ethanol gas mixture having a concentration of 3 p pm. But it can detect it with sufficient accuracy. [Other Embodiment] Another embodiment will be described below. <1> The supply source 3 is replaced with the injector 3a and the vaporizer 3b in the previous embodiment, and vaporized in ethanol air or nitrogen gas so that the concentration of the upper explosion limit is 19% or more in advance. Alternatively, a storage tank in which the prepared mixed gas is stored may be provided. In this case, instead of operating the injector 3a and the vaporizer 3b, a connection valve (not shown) from the storage tank to the pipeline 4 is opened / closed. All you have to do is Further, the supply source 3 may be configured by adding the storage tank to the above embodiment. That is, the inspection gas supply source 3 used in the leak detection device of the present invention is of a type that substantially instantaneously vaporizes a liquid combustible organic compound such as ethanol, or a compound such as ethanol that has been vaporized in advance. It may be either a system provided with a storage tank for a mixed gas containing vapor at a predetermined concentration or a system provided with both of them. <2> Various types of test containers 1 can be applied in addition to the kerosene can described in the previous embodiment. Furthermore, a large number of test containers 1 can be placed in the chamber 2. By doing so, it is possible to inspect for leaks from a large number of containers 1 to be tested at once. <3> Suction pipes 7a are continuously drawn out from a plurality of positions in the chamber 1, and a suction device and the gas detector 8 are interposed in each of these pipes, and the gas passing therethrough is separately or merged. After that, a configuration may be adopted in which a pipe for feeding the gas into the chamber 2 is provided, and by doing so, it is possible to estimate the leak position by checking which gas detector detects the leak gas quickly or densely. It is possible to make it easier. In addition, a plurality of discharge ports 7b may be provided from the closed chamber gas circulation passage 7 into the chamber 2 and the gas may be blown into the chamber 2 from different directions. Well, by doing so, the leaked gas can be easily diffused into the chamber 2 quickly, and even if the leak occurs from any position, the leak can be detected quickly. Furthermore, the inside of the chamber 2 and the inside of the test container 1 may be configured so that they can be reversed. Further, it is possible to carry out the inspection by accommodating it in the chamber 2 in a state in which the inspection gas is press-fitted and sealed in the inspection container 1 in advance. On the other hand, it is possible to carry out the inspection by keeping the inside of the chamber 2 at a pressure lower than the atmospheric pressure. <4> The leak detection device according to the present invention can automate its operations by, for example, a method such as microcomputer control or sequence control. In the claims of utility model registration, reference numerals are given for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

【図面の簡単な説明】【図１】実施例の漏洩検知装置を表す概要図【図２】別実施例の漏洩検知装置を表す概要図【図３】アルコール敏感性ガスセンサーの感度を示す図【符号の説明】１被検容器２チャンバー３供給源３ｂ気化器３ｃ圧入装置４圧入路６送風機７密閉流路８ガス検知器１４ａ第一分路１４ｂ流量調整装置１４ｃ第二分路１４ｄ流量調整装置[Brief description of drawings] FIG. 1 is a schematic diagram showing a leak detection device according to an embodiment. FIG. 2 is a schematic diagram showing a leak detection device according to another embodiment. FIG. 3 is a diagram showing the sensitivity of an alcohol-sensitive gas sensor. [Explanation of symbols] 1 Test container 2 chambers 3 sources 3b vaporizer 3c Press-fitting device 4 Press fit path 6 blower 7 closed channel 8 gas detectors 14a First shunt 14b Flow rate adjusting device 14c Second shunt 14d Flow control device

─────────────────────────────────────────────────────
【手続補正書】【提出日】平成４年１１月２５日【手続補正１】【補正対象書類名】明細書【補正対象項目名】全文【補正方法】変更【補正内容】【書類名】明細書【考案の名称】容器の漏洩検知装置【実用新案登録請求の範囲】１．被検容器（１）を内部に収納自在な密閉チャンバー
（２）を設け、前記密閉チャンバー（２）内の前記被検
容器（１）に検査用ガスを圧入自在なガス圧入路（４）
を設け、前記被検容器（１）に圧入された前記検査用ガ
スの前記チャンバー（２）内への漏出を検査するガス検
知器（８）を設けた容器の漏洩検知装置であって、揮発性液体を気化させて前記検査用ガスを造る気化器
（３ｂ）と、その気化器（３ｂ）で造られた前記検査用
ガスを前記圧入路（４）を通して前記被検容器（１）内
に圧入する圧入装置（３ｃ）とを、前記検査用ガスの供
給源（３）に設け、前記チャンバー（２）内の気体を送
風機（６）を介して取り出して前記チャンバー（２）内
に戻すチャンバー内気体循環用密閉流路（７）を設ける
と共に、前記密閉流路（７）内に、並列に接続された第
一分路（１４ａ）と第二分路（１４ｃ）とを設け、前記
第一分路（１４ａ）に前記ガス検知器（８）を配置し、
前記第一・第二分路（１４ａ),（１４ｃ）に、それらの
流通気体流量をそれぞれ調整自在な一対の流量調整装置
（１４ｂ),（１４ｄ）を各別に設けてある容器の漏洩検
知装置。２．前記揮発性液体がアルコールであり、前記気化器
（３ｂ）が加熱手段と霧化手段との一方または双方を備
えたものである実用新案登録請求の範囲第１項に記載の
容器の漏洩検知装置。３．前記ガス検知器（８）が、酸化スズ半導体素子にア
ルカリ土類金属の酸化物を担持させたアルコール敏感性
半導体式ガス検知素子を備えたものである実用新案登録
請求の範囲第１項または第２項に記載の容器の漏洩検知
装置。【図面の簡単な説明】【図１】実施例の漏洩検知装置を表す概要図【図２】実施例のガス検知素子の感度を示す図【符号の説明】１被検容器２チャンバー３供給源３ｂ気化器３ｃ圧入装置４圧入路６送風機７密閉流路８ガス検知器１４ａ第一分路１４ｂ流量調整装置１４ｃ第二分路１４ｄ流量調整装置【手続補正２】【補正対象書類名】図面【補正対象項目名】全図【補正方法】変更【補正内容】【図１】【図２】 ─────────────────────────────────────────────────── ───
[Procedure Amendment] [Submission Date] November 25, 1992 [Procedure Amendment 1] [Amendment Document Name] Specification [Amendment Item Name] Full Text [Amendment Method] Change [Amendment Content] [Document Name] Specification Document [Name of device] Container leak detection device [Claims for utility model registration] 1. A closed chamber (2) in which the test container (1) can be housed is provided, and a gas injection path (4) in which a test gas can be press-fitted into the test container (1) in the closed chamber (2).
And a gas detector (8) for inspecting leakage of the inspection gas press-fitted into the inspection container (1) into the chamber (2). A vaporizer (3b) that vaporizes a volatile liquid to produce the inspection gas, and the inspection gas produced by the vaporizer (3b) into the test container (1) through the press-fitting passage (4). A chamber which is provided with a press-fitting device (3c) for press-fitting in the inspection gas supply source (3) and takes out the gas in the chamber (2) through the blower (6) and returns it into the chamber (2). A closed channel (7) for circulating the internal gas is provided, and a first branch (14a) and a second branch (14c) connected in parallel are provided in the closed channel (7). The gas detector (8) is arranged in the shunt (14a),
A container leakage detection device in which a pair of flow rate control devices (14b) and (14d) capable of respectively adjusting the flow rates of the flowing gases are separately provided in the first and second shunts (14a) and (14c). .. 2. The container leakage detection device according to claim 1, wherein the volatile liquid is alcohol, and the vaporizer (3b) is provided with one or both of a heating unit and an atomizing unit. .. 3. The utility model registration claim 1 or 2 in which the gas detector (8) is equipped with an alcohol-sensitive semiconductor gas detector element in which an oxide of an alkaline earth metal is supported on a tin oxide semiconductor element. The container leak detection device according to item 2. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a leak detection device according to an embodiment. FIG. 2 is a diagram showing the sensitivity of a gas detection element according to the embodiment. [Explanation of reference numerals] 1 test container 2 chamber 3 supply source 3b Vaporizer 3c Press-in device 4 Press-in passage 6 Blower 7 Closed flow passage 8 Gas detector 14a First shunt 14b Flow rate adjusting device 14c Second shunt 14d Flow rate adjusting device [Procedure 2] [Document name to be corrected] Drawing Items to be corrected] All drawings [Correction method] Change [Correction details] [Fig. 1] [Fig. 2]

Claims

[Claims for utility model registration] 1. A closed chamber (2) in which the test container (1) can be housed is provided, and a gas injection path (4) in which a test gas can be press-fitted into the test container (1) in the closed chamber (2).
And a gas detector (8) for inspecting leakage of the inspection gas press-fitted into the inspection container (1) into the chamber (2). A vaporizer (3b) that vaporizes a volatile liquid to produce the inspection gas, and the inspection gas produced by the vaporizer (3b) into the test container (1) through the press-fitting passage (4). A chamber which is provided with a press-fitting device (3c) for press-fitting in the inspection gas supply source (3) and takes out the gas in the chamber (2) through the blower (6) and returns it into the chamber (2). A closed channel (7) for circulating the internal gas is provided, and a first branch (14a) and a second branch (14c) connected in parallel are provided in the closed channel (7). The gas detector (8) is arranged in the shunt (14a),
A container leakage detection device in which a pair of flow rate control devices (14b) and (14d) capable of respectively adjusting the flow rates of the flowing gases are separately provided in the first and second shunts (14a) and (14c). .. 2. The container leakage detection device according to claim 1, wherein the volatile liquid is alcohol, and the vaporizer (3b) is provided with one or both of a heating unit and an atomizing unit. .. 3. The utility model registration claim 1 or 2 wherein the gas detector (8) is an alcohol-sensitive thermolinear semiconductor gas sensor in which a tin oxide semiconductor element carries an oxide of an alkaline earth metal. The leak detection device for the container described.