JP3416828B2 - Oxygen concentration detector for petroleum dry cleaner - Google Patents
Oxygen concentration detector for petroleum dry cleanerInfo
- Publication number
- JP3416828B2 JP3416828B2 JP19125194A JP19125194A JP3416828B2 JP 3416828 B2 JP3416828 B2 JP 3416828B2 JP 19125194 A JP19125194 A JP 19125194A JP 19125194 A JP19125194 A JP 19125194A JP 3416828 B2 JP3416828 B2 JP 3416828B2
- Authority
- JP
- Japan
- Prior art keywords
- oxygen concentration
- compressed air
- air supply
- supply valve
- petroleum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims description 36
- 239000001301 oxygen Substances 0.000 title claims description 36
- 229910052760 oxygen Inorganic materials 0.000 title claims description 36
- 239000003208 petroleum Substances 0.000 title claims description 13
- 239000007789 gas Substances 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 239000002904 solvent Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical group O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000005108 dry cleaning Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】この発明は、石油系ドライクリー
ナにおける酸素濃度検出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 an oxygen concentration detector for a petroleum dry cleaner.
【０００２】[0002]
【従来の技術】ドライクリーニングにおいては、石油系
溶剤を使用しているものがある。しかし、石油系溶剤
は、その引火点が約４１℃と低いため、引火しやすく、
石油系溶剤を使用した石油系ドライクリーナにおいて
は、被洗物の静電気による火花や、被洗物内の金属製品
と金属製の内胴との圧接による火花によって、溶剤ガス
に引火し、溶剤ガスが爆発するおそれがある。このよう
な爆発事故を防止するために、石油系ドライクリーナに
おいては、真空ポンプ等によって洗浄・乾燥系統を減圧
して酸素を少なくし、かつ、窒素供給装置から洗浄・乾
燥系統に窒素を注入して、洗浄・乾燥系統の酸素濃度
（体積％）を、爆発の危険のない１１％以下に設定して
いる。そして、洗浄・乾燥系統の酸素濃度を常時、把握
するために、石油系ドライクリーナに酸素濃度検出装置
を設置し、酸素濃度が爆発の危険のある１１％を超える
と、警報を発するとともに、運転を停止するように、そ
の運転を制御している。したがって、酸素濃度の管理
は、極めて重要である。2. Description of the Related Art In dry cleaning, some petroleum-based solvents are used. However, since petroleum-based solvents have a low flash point of about 41 ° C, they easily ignite,
In petroleum-based dry cleaners that use petroleum-based solvents, the solvent gas is ignited by sparks caused by static electricity on the object to be washed or by pressure contact between the metal product inside the object to be washed and the metal inner case. May explode. In order to prevent such an explosion accident, in a petroleum dry cleaner, the cleaning / drying system is decompressed by a vacuum pump to reduce oxygen, and nitrogen is injected from the nitrogen supply device into the cleaning / drying system. Therefore, the oxygen concentration (volume%) of the cleaning / drying system is set to 11% or less, where there is no danger of explosion. And, in order to constantly grasp the oxygen concentration of the cleaning / drying system, an oxygen concentration detector is installed in the petroleum dry cleaner, and when the oxygen concentration exceeds 11%, which is a danger of explosion, an alarm is issued and operation is started. Its operation is controlled so as to stop. Therefore, the control of oxygen concentration is extremely important.
【０００３】酸素濃度検出装置は、図２、３に示すよう
に、洗浄槽１とチャンバ２との間に設けられた、パイプ
３、冷却器４、逆止弁５、圧送管６、酸素濃度計取付パ
イプ７、逆止弁８、パイプ９、エアピストン１０、エア
シリンダ１１及びブラケット１２からなる外部気体通路
と、該外部気体通路の途中、すなわち酸素濃度計取付パ
イプ７に取り付けられた酸素濃度計１３とから構成され
ている。As shown in FIGS. 2 and 3, the oxygen concentration detecting device includes a pipe 3, a cooler 4, a check valve 5, a pressure feeding pipe 6, an oxygen concentration, which is provided between the cleaning tank 1 and the chamber 2. An external gas passage consisting of a meter mounting pipe 7, a check valve 8, a pipe 9, an air piston 10, an air cylinder 11 and a bracket 12, and an oxygen concentration attached to the oxygen gas meter mounting pipe 7 in the middle of the external gas passage. It is composed of 13 in total.
【０００４】エアピストン１０をエアシリンダ１１によ
り往復させて、洗浄槽１内の気体を、パイプ３により吸
い込み、冷却水入口４Ａ、冷却水出口４Ｂを備えた冷却
器４によって冷却、除湿し、酸素濃度計取付パイプ７、
パイプ９を介して乾燥系統のチャンバ２内に逆止弁５及
び逆止弁８によって一方向にのみ送り出している。酸素
濃度計１３は、酸素濃度計取付パイプ７を通過する気体
に触れて、酸素濃度を検出する。エアピストン１０、エ
アシリンダ１１によって気体を強制循環させるのは、酸
素濃度が変化する気体を迅速に検出するためであり、冷
却器４によって吸い込んだ気体を冷却、除湿するのは、
酸素濃度計１３に結露が生じると、酸素濃度を正確に検
出することができないので、結露の発生を防止するため
である。乾燥系統は、洗浄槽（外胴・内胴）１、チャン
バ２、リントフィルター１４、ファン１５、クーラー１
６、ヒーター１７から構成され、乾燥工程ではヒーター
１７を、クールダウン工程ではクーラー１６を作動させ
て、乾燥系統の空気を加熱、冷却している。乾燥工程ま
たはクールダウン工程が終了した後は、被洗物を出し入
れする扉（図示せず）を開くと、ファン１５が自動的に
作動し、同時にチャンバ２に設けられた排気弁１８も開
き、扉より室内空気を吸い込み、排気弁１８より大気に
排出して、作業環境への溶剤ガスの流出を防止してい
る。The air piston 10 is reciprocated by the air cylinder 11, the gas in the cleaning tank 1 is sucked in by the pipe 3, and is cooled and dehumidified by the cooler 4 having the cooling water inlet 4A and the cooling water outlet 4B. Concentrator mounting pipe 7,
The check valve 5 and the check valve 8 feed the stuff in only one direction into the chamber 2 of the drying system through the pipe 9. The oximeter 13 touches the gas passing through the oximeter mounting pipe 7 to detect the oxygen concentration. The gas is forcibly circulated by the air piston 10 and the air cylinder 11 in order to quickly detect the gas whose oxygen concentration changes, and the gas sucked by the cooler 4 is cooled and dehumidified.
This is because if the dew condensation occurs in the oxygen concentration meter 13, the oxygen concentration cannot be accurately detected, so that the dew condensation is prevented. The drying system is a washing tank (outer body / inner body) 1, chamber 2, lint filter 14, fan 15, cooler 1.
6, the heater 17 is operated, and the heater 17 is operated in the drying process and the cooler 16 is operated in the cool down process to heat and cool the air in the drying system. After the drying process or the cool down process is completed, when a door (not shown) for loading and unloading the object to be washed is opened, the fan 15 automatically operates, and at the same time, the exhaust valve 18 provided in the chamber 2 is also opened. The indoor air is sucked in through the door and discharged into the atmosphere through the exhaust valve 18 to prevent the solvent gas from flowing out into the working environment.
【０００５】なお、図２において、１９は圧縮空気発生
装置、２０は窒素発生装置、２１は窒素タンク、２２は
窒素投入弁である。In FIG. 2, 19 is a compressed air generator, 20 is a nitrogen generator, 21 is a nitrogen tank, and 22 is a nitrogen injection valve.
【０００６】[0006]
【発明が解決しようとする課題】この従来技術において
は、酸素濃度計１３は、酸素濃度計取付パイプ７に取り
付けられ、減圧、窒素の注入の工程が繰り返される雰囲
気に接している。このため、酸素濃度の管理の重要性か
らして酸素濃度計１３を定期的に点検し、較正するとき
には、酸素濃度計取付パイプ７から取り外して、酸素濃
度計１３を大気に晒す必要がある。したがって、酸素濃
度計１３の較正は、容易ではなく、時間がかかるという
課題がある。なお、酸素濃度計１３は、大気に晒される
ことによって、酸素濃度（体積％）２０．９％の大気に
接していることになり、その誤差がある場合、その内部
機構によって自動的に較正される。In this prior art, the oximeter 13 is attached to the oximeter attachment pipe 7 and is in contact with the atmosphere in which the steps of depressurization and nitrogen injection are repeated. Therefore, when the oxygen concentration meter 13 is regularly inspected and calibrated due to the importance of managing the oxygen concentration, it is necessary to remove it from the oxygen concentration meter attachment pipe 7 and expose the oxygen concentration meter 13 to the atmosphere. Therefore, calibration of the oximeter 13 is not easy and takes time. Note that the oximeter 13 is in contact with the atmosphere having an oxygen concentration (volume%) of 20.9% by being exposed to the atmosphere, and if there is an error, it is automatically calibrated by its internal mechanism. It
【０００７】この発明は、このような従来技術の課題を
解決する目的でなされたものである。The present invention has been made for the purpose of solving the problems of the prior art.
【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
の手段を、実施例に対応する図１を用いて以下、説明す
る。この発明は、圧縮空気給気弁３０を酸素濃度計１３
の前の外部気体通路に分岐して設け、圧縮空気を圧縮空
気給気弁３０を介して酸素濃度計１３に供給し、排気弁
１８を介してチャンバ２外に排出したものである。Means for solving the above problems will be described below with reference to FIG. 1 corresponding to the embodiment. According to the present invention, the compressed air supply valve 30 is installed in the oxygen concentration meter 13
The compressed air is supplied to the oxygen concentration meter 13 via the compressed air supply valve 30 and discharged to the outside of the chamber 2 via the exhaust valve 18.
【０００９】[0009]
【作用】このように構成されたものにおいては、圧縮空
気給気弁３０及び排気弁１８を開くことによって、酸素
濃度計１３は短時間で大気に晒される。With the above arrangement, the oxygen concentration meter 13 is exposed to the atmosphere in a short time by opening the compressed air supply valve 30 and the exhaust valve 18.
【００１０】[0010]
【実施例】図１は、この発明の一実施例を示す図であ
る。図１において、３０は圧縮空気給気弁である。圧縮
空気給気弁３０の一端は、パイプ３１を介して圧縮空気
発生装置１９に接続されている。圧縮空気給気弁３０の
他端は、パイプ３２を介して外部気体通路を構成する圧
送管６と酸素濃度計取付パイプ７の間に設けられた分岐
管３３に接続されている。これにより、圧縮空気給気弁
３０は、酸素濃度計１３の前の外部気体通路に分岐して
設けられている。1 is a diagram showing an embodiment of the present invention. In FIG. 1, 30 is a compressed air supply valve. One end of the compressed air supply valve 30 is connected to the compressed air generator 19 via a pipe 31. The other end of the compressed air supply valve 30 is connected via a pipe 32 to a branch pipe 33 provided between the pressure feed pipe 6 and the oximeter mounting pipe 7 that form an external gas passage. Thereby, the compressed air supply valve 30 is provided so as to branch to the external gas passage in front of the oximeter 13.
【００１１】圧縮空気給気弁３０及び排気弁１８は、自
動弁で構成され、その制御回路は、操作スイッチの操作
によって圧縮空気給気弁３０及び排気弁１８は同時に開
き、一定時限後、同時に閉じるように構成されている。
操作スイッチは、較正専用でも良いし、または、石油系
ドライクリーナ始動用でもよい。前者の場合は、操作ス
イッチの「入」操作によって圧縮空気発生装置１９を始
動させる必要があるが、後者の場合は、通常、圧縮空気
発生装置１９は始動する。The compressed air supply valve 30 and the exhaust valve 18 are constituted by automatic valves, and the control circuit thereof is such that the compressed air supply valve 30 and the exhaust valve 18 are opened at the same time by the operation of the operation switch, and after a certain period of time, simultaneously. It is configured to close.
The operating switch may be dedicated to calibration or may be for starting a petroleum-based dry cleaner. In the former case, it is necessary to start the compressed air generating device 19 by the "ON" operation of the operation switch, but in the latter case, the compressed air generating device 19 is usually started.
【００１２】操作スイッチの「入」操作によって、圧縮
空気発生装置１９は始動するとともに、圧縮空気給気弁
３０及び排気弁１８は開く。圧縮空気は、パイプ３１、
圧縮空気給気弁３０、パイプ３２を通って分岐管３３に
至る。そして、圧縮空気は、洗浄槽１への流入は逆止弁
５によって阻止され、酸素濃度計取付パイプ７、逆止弁
８、パイプ９を通ってチャンバ２内に入り、排気弁１８
から、チャンバ２外に排出される。この過程を通じて、
酸素濃度計１３は、圧縮空気に接し、大気に晒されるこ
とになる。圧縮空気を利用するのは、短時間で大気に晒
さすためである。The compressed air generator 19 is started and the compressed air supply valve 30 and the exhaust valve 18 are opened by the "ON" operation of the operation switch. Compressed air is pipe 31,
The compressed air supply valve 30 and the pipe 32 reach the branch pipe 33. Then, the compressed air is blocked from flowing into the cleaning tank 1 by the check valve 5, passes through the oxygen concentration meter mounting pipe 7, the check valve 8 and the pipe 9 into the chamber 2, and the exhaust valve 18
Is discharged from the chamber 2. Through this process,
The oxygen concentration meter 13 comes into contact with compressed air and is exposed to the atmosphere. The compressed air is used because it is exposed to the atmosphere in a short time.
【００１３】酸素濃度計１３は、大気に晒されることに
よって、誤差がある場合、その内部機構によって自動的
に較正される。一定時限後、図示しないタイマーの動作
によって圧縮空気給気弁３０及び排気弁１８は閉じる。
操作スイッチが石油系ドライクリーナ始動用である場合
は、その始動に当たって、常に酸素濃度計１３は自動的
に較正され、その後に次の工程に入るので、機器に対す
る信頼性も増大する。The oximeter 13 is automatically calibrated by its internal mechanism if there is an error due to exposure to the atmosphere. After a certain period of time, the compressed air supply valve 30 and the exhaust valve 18 are closed by the operation of a timer (not shown).
When the operation switch is for starting a petroleum-based dry cleaner, the oximeter 13 is always calibrated automatically at the time of starting, and the next step is performed thereafter, so that the reliability of the equipment is also increased.
【００１４】このように、圧縮空気給気弁３０及び排気
弁１８を開くことによって、酸素濃度計１３は短時間で
大気に晒される。したがって、酸素濃度計１３の定期的
較正は、極めて容易である。As described above, by opening the compressed air supply valve 30 and the exhaust valve 18, the oximeter 13 is exposed to the atmosphere in a short time. Therefore, periodic calibration of the oximeter 13 is extremely easy.
【００１５】[0015]
【発明の効果】以上説明してきたように、この発明は、
圧縮空気給気弁を酸素濃度計の前の外部気体通路に分岐
して設け、圧縮空気を前記圧縮空気給気弁を介して前記
酸素濃度計に供給し、排気弁を介して前記チャンバ外に
排出したものである。それゆえ、圧縮空気給気弁及び排
気弁を開くことによって、短時間で酸素濃度計は大気に
晒される。したがって、この発明によれば、酸素濃度計
の較正を簡単かつ短時間で行うことができるという効果
が得られる。As described above, the present invention is
A compressed air supply valve is provided by branching to an external gas passage in front of the oxygen concentration meter, compressed air is supplied to the oxygen concentration meter via the compressed air supply valve, and then out of the chamber via an exhaust valve. It has been discharged. Therefore, by opening the compressed air supply valve and the exhaust valve, the oximeter is exposed to the atmosphere in a short time. Therefore, according to the present invention, it is possible to calibrate the oximeter easily and in a short time.
【図１】この発明の一実施例を示す系統図である。FIG. 1 is a system diagram showing an embodiment of the present invention.
【図２】従来技術を示す系統図である。FIG. 2 is a system diagram showing a conventional technique.
【図３】従来技術を示す詳細構成図である。FIG. 3 is a detailed configuration diagram showing a conventional technique.
１３ 酸素濃度計 １８ 排気弁 ３０ 圧縮空気給気弁 13 Oxygen meter 18 Exhaust valve 30 Compressed air supply valve
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 27/00 - 27/49 D06F 1/00 - 51/02 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) G01N 27/00-27/49 D06F 1/00-51/02
Claims (2)
部気体通路を設け、該外部気体通路の途中に酸素濃度計
を取り付け、該酸素濃度計によって洗浄・乾燥系統内の
酸素の濃度を検出する石油系ドライクリーナにおける酸
素濃度検出装置において、圧縮空気給気弁を酸素濃度計
の前の外部気体通路に分岐して設け、圧縮空気を前記圧
縮空気給気弁を介して前記酸素濃度計に供給し、排気弁
を介して前記チャンバ外に排出したことを特徴とする石
油系ドライクリーナにおける酸素濃度検出装置1. An external gas passage is provided between a cleaning tank and a chamber of a drying system, an oxygen concentration meter is attached in the middle of the external gas passage, and the oxygen concentration in the cleaning / drying system is measured by the oxygen concentration meter. In an oxygen concentration detection device for a petroleum dry cleaner for detection, a compressed air supply valve is provided by branching to an external gas passage in front of the oxygen concentration meter, and compressed air is supplied through the compressed air supply valve to the oxygen concentration meter. Of the oxygen concentration in a petroleum dry cleaner, characterized in that
成し、操作スイッチの操作によって前記両弁が同時に開
き、一定時限後、同時に閉じる請求項１の石油系ドライ
クリーナにおける酸素濃度検出装置2. The oxygen concentration detection in a petroleum-based dry cleaner according to claim 1, wherein the compressed air supply valve and the exhaust valve are automatic valves, both of which are opened simultaneously by operating an operation switch, and are closed at the same time after a certain period of time. apparatus
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19125194A JP3416828B2 (en) | 1994-07-22 | 1994-07-22 | Oxygen concentration detector for petroleum dry cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19125194A JP3416828B2 (en) | 1994-07-22 | 1994-07-22 | Oxygen concentration detector for petroleum dry cleaner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0835945A JPH0835945A (en) | 1996-02-06 |
| JP3416828B2 true JP3416828B2 (en) | 2003-06-16 |
Family
ID=16271428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19125194A Expired - Fee Related JP3416828B2 (en) | 1994-07-22 | 1994-07-22 | Oxygen concentration detector for petroleum dry cleaner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3416828B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020046955A1 (en) | 2018-08-27 | 2020-03-05 | Ecolab Usa Inc. | System and technique for extracting particulate-containing liquid samples without filtration |
-
1994
- 1994-07-22 JP JP19125194A patent/JP3416828B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0835945A (en) | 1996-02-06 |
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