JPH03226642A - Analysis of gas dissolved in oil - Google Patents
Analysis of gas dissolved in oilInfo
- Publication number
- JPH03226642A JPH03226642A JP2324890A JP2324890A JPH03226642A JP H03226642 A JPH03226642 A JP H03226642A JP 2324890 A JP2324890 A JP 2324890A JP 2324890 A JP2324890 A JP 2324890A JP H03226642 A JPH03226642 A JP H03226642A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- oil
- dissolved
- amount
- carrier gas
- 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.)
- Pending
Links
- 239000007789 gas Substances 0.000 claims abstract description 38
- 238000000605 extraction Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000012159 carrier gas Substances 0.000 claims abstract description 13
- 238000007872 degassing Methods 0.000 claims description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 7
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 229910052786 argon Inorganic materials 0.000 abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 3
- 239000001307 helium Substances 0.000 abstract description 2
- 229910052734 helium Inorganic materials 0.000 abstract description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001873 dinitrogen Inorganic materials 0.000 abstract 1
- 238000004817 gas chromatography Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000009849 vacuum degassing Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; viscous liquids; paints; inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2835—Oils, i.e. hydrocarbon liquids specific substances contained in the oil or fuel
- G01N33/2841—Oils, i.e. hydrocarbon liquids specific substances contained in the oil or fuel gas in oil, e.g. hydrogen in insulating oil
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は油中溶存ガス分析方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for analyzing dissolved gases in oil.
（従来の技術）
油入電気機器の保守管理項目のひとつに、油中溶存ガス
の分析がある。これはその電気機器に使用されている油
の中に溶存するガスたとえば水素ガスを抽出してその濃
度を計測し、電気機器の絶縁破壊を予測するものである
。(Prior Art) One of the maintenance management items for oil-filled electrical equipment is analysis of gas dissolved in oil. This method extracts a gas such as hydrogen gas dissolved in the oil used in the electrical equipment, measures its concentration, and predicts the dielectric breakdown of the electrical equipment.
油中溶存ガスの抽出に真空脱気法が広く用いられており
、その中でも特にピストン法が自動計測器として用いら
れている。その構成を第１図に示す（雑誌「電気協同研
究Ｊ Ｖｏｌ ３６．Ｎｏ １を参照、）。Vacuum deaeration methods are widely used to extract gases dissolved in oil, and among them, the piston method is particularly used as an automatic measuring instrument. Its configuration is shown in FIG. 1 (see the magazine ``Electric Kyodo Research J Vol 36. No 1'').
図の構成は次のようにして動作される。The illustrated arrangement operates as follows.
■系内を真空ポンプ１により排気する。■ Evacuate the system using vacuum pump 1.
■真空ポンプ１の系を閉とした後、試料油を注入器２に
より鋭器容器３内に注入する。(2) After closing the vacuum pump 1 system, the sample oil is injected into the sharps container 3 using the syringe 2.
■スタータ４により攪拌しながら、シリンダ５の移動弁
６を移動させる。(2) While stirring with the starter 4, move the moving valve 6 of the cylinder 5.
■移動弁６の移動過程で、抽出ガスをシリンダ５内に取
り込み、続いて切替弁７を切り替えて。(2) In the process of moving the moving valve 6, the extraction gas is taken into the cylinder 5, and then the switching valve 7 is switched.
移動弁６をもとに戻し、その抽出ガスをガス試料管８へ
送り込む、これを数回繰り返す。Return the transfer valve 6 to its original position and send the extracted gas to the gas sample tube 8. This process is repeated several times.
■抽出ガスはキャリアガス１ｏによってガス試料管８か
らガス量測定手段９へ抽出ガスを送り、濃度を計測し、
試料油量へ換算し、濃度を計測する。■The extracted gas is sent from the gas sample tube 8 to the gas amount measuring means 9 using the carrier gas 1o, and its concentration is measured.
Convert to sample oil volume and measure concentration.
なお図中１１は試料油量を測定するマノメータである。Note that 11 in the figure is a manometer for measuring the amount of sample oil.
この方法によって得られた水素ガスの抽出率と油中に溶
存している空気量との関係を示したのが第２図中の特性
曲線Ａである。なおこの計測は水素ガス５００ｐｐｍを
溶存している油を対象とし、次のような条件の下で行な
った。Characteristic curve A in FIG. 2 shows the relationship between the hydrogen gas extraction rate obtained by this method and the amount of air dissolved in the oil. Note that this measurement was performed on oil containing 500 ppm of hydrogen gas dissolved therein under the following conditions.
真空度 １０−’ｍｍＨｇ、 抽出時間 ８分、 ピ
ストン可動回数 ５回、油温 ２０℃。Vacuum degree: 10-'mmHg, extraction time: 8 minutes, number of piston movements: 5 times, oil temperature: 20°C.
（発明が解決しようとする課題）
この特性曲線から理解されるように、油中に含まれる空
気量により、抽出率により極端に変化する。そのため濃
度の測定精度は極めて悪い。これは次のような理由によ
るものと考えられる。(Problems to be Solved by the Invention) As can be understood from this characteristic curve, the amount of air contained in the oil varies drastically depending on the extraction rate. Therefore, the accuracy of concentration measurement is extremely poor. This is considered to be due to the following reasons.
試料油を真空排気されている脱気容器３内に注入される
と、気泡となって系内に入っていく。このとき油中に溶
存している空気は、水素ガスを系内に押し畠す作用をす
る。このとき空気の量が少ないと、その押出し作用は僅
かである。When the sample oil is injected into the vacuum-exhausted degassing container 3, it forms bubbles and enters the system. At this time, the air dissolved in the oil acts to push hydrogen gas into the system. At this time, if the amount of air is small, the extrusion effect will be slight.
そのため多くの水素ガスは系内に滞留してしまい、ガス
試料管８まで到達する量は僅かとなる。Therefore, much of the hydrogen gas remains in the system, and only a small amount reaches the gas sample tube 8.
これによって抽出率は、空気量が少ないと小さい値とな
る。As a result, the extraction rate becomes a small value when the amount of air is small.
この発明は、油中に溶存している空気量が少ない場合で
も、油中に溶存している水素ガスのようなガスの抽出率
を高めることを目的とする６（課題を解決するための手
段）
この発明は、油中溶存ガスの抽出において、真空脱気を
行なう際、真空脱気中にキャリアガスを抽出系内または
試料油中に注入することを特徴とする。The purpose of this invention is to increase the extraction rate of gases such as hydrogen gas dissolved in oil even when the amount of air dissolved in oil is small. ) This invention is characterized in that when performing vacuum degassing in the extraction of gas dissolved in oil, a carrier gas is injected into the extraction system or into the sample oil during vacuum degassing.
（作用）
キャリアガスが注入されると、系内に滞留している抽出
ガスは、このキャリアガスによって押し出される。これ
によって抽出ガスの滞留は回避されるようになる。(Function) When the carrier gas is injected, the extraction gas remaining in the system is pushed out by the carrier gas. This avoids retention of extraction gas.
（実施例）
この発明の実施例を次に説明する。前記したピストン法
による抽出過程、具体的には移動弁６を移動させている
過程で、注入器２によりキャリアガスとしてアルゴンガ
スを１０飄Ｑ注入した。その他の試験条件は前記したの
と同じである。その結果を示したのが第２図の特性曲線
Ｂである。(Example) An example of the present invention will be described below. During the extraction process using the piston method described above, specifically, during the process of moving the moving valve 6, 10 tons of argon gas was injected as a carrier gas using the injector 2. Other test conditions were the same as described above. Characteristic curve B in FIG. 2 shows the result.
これから理解されるように空気量が０の場合でも、抽出
率は８０％となり、従来方法に比較して格段に向上して
いる。As will be understood from this, even when the amount of air is 0, the extraction rate is 80%, which is a marked improvement compared to the conventional method.
なおキャリアガスの注入方式としては、脱気容器３に注
入するのに代えて、系内に直接注入するようにしてもよ
い。Note that the carrier gas may be injected directly into the system instead of being injected into the degassing container 3.
また注入に際し、専用の注入配管を設けてシーケンス制
御により注入するようにしてもよく、これによれば容易
に自動化することが可能となる。Further, when injecting, a dedicated injection pipe may be provided and the injection may be performed by sequence control, which allows for easy automation.
キャリアガスとしては、分析対象のガス以外のガスを使
用するとともに、濃度計測器で使用されるガスと同じガ
スを使用するとよい０例えば濃度計測器がガスクロマト
グラフである場合は、アルゴン以外に、窒素ガス、ヘリ
ウムガスなどが使用される。As the carrier gas, it is recommended to use a gas other than the gas to be analyzed, as well as the same gas used in the concentration measuring instrument.For example, if the concentration measuring instrument is a gas chromatograph, in addition to argon, nitrogen may be used. Gas, helium gas, etc. are used.
注入量としては、試料油に対して、容積にして１／１０
００〜１／２が適当である。これが１／１０００以下で
あると、抽出率の向上にはあまり寄与しないし。The injection amount is 1/10 of the volume of the sample oil.
00 to 1/2 is appropriate. If this is less than 1/1000, it will not contribute much to improving the extraction rate.
１／２以上となると、真空脱気系内の体積上、大型化し
、あまり好ましくない。If it is 1/2 or more, the vacuum degassing system becomes large in terms of volume, which is not very preferable.
（発明の効果）
以上詳述したようにこの発明によれば、油中に溶存して
いるガスの抽出を、真空脱気法によって行なう場合、キ
ャリアガスを注入することによって、ガスの抽出率を向
上させることができる効果を奏する。(Effects of the Invention) As detailed above, according to the present invention, when gas dissolved in oil is extracted by vacuum deaeration, the gas extraction rate can be increased by injecting carrier gas. It has an effect that can be improved.
第１図はこの発明方法を実施するのに使用する構成を示
す構成図、第２図はこの発明の実施例によるガス抽出率
特性曲線図である。
１・・真空ポンプ、２・・・注入器、３・・・脱気容器
、５・・シリンダ、６・・・移動弁、８・・・ガス試料
管、Ａ・・・従来方法による特性曲線、Ｂ・・・この発
明方法による特性曲線、FIG. 1 is a block diagram showing the configuration used to carry out the method of the present invention, and FIG. 2 is a gas extraction rate characteristic curve diagram according to an embodiment of the present invention. 1...Vacuum pump, 2...Injector, 3...Degassing container, 5...Cylinder, 6...Movement valve, 8...Gas sample tube, A...Characteristic curve by conventional method , B...Characteristic curve according to the method of this invention,
Claims (1)
入し、前記系内にあるシリンダの移動弁を繰返し駆動す
ることによって、前記試料油から抽出された分析対象の
ガスをガス試料管に送り、前記試料油中に溶存している
ガスを分析する油中溶存ガス分析方法において、 前記ガスの抽出過程において、前記試料油または前記系
内に、前記分析対象のガスとは異なるキャリアガスを注
入することを特徴とする 油中溶存ガス分析方法。[Claims] An analysis target extracted from the sample oil by injecting the sample oil into a degassing container in a vacuum-exhausted system and repeatedly driving a moving valve of a cylinder in the system. In the method for analyzing dissolved gases in oil, which sends a gas to a gas sample tube and analyzes the gas dissolved in the sample oil, in the gas extraction process, the sample oil or the system contains the target of analysis. A method for analyzing dissolved gases in oil, which is characterized by injecting a carrier gas different from gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2324890A JPH03226642A (en) | 1990-01-31 | 1990-01-31 | Analysis of gas dissolved in oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2324890A JPH03226642A (en) | 1990-01-31 | 1990-01-31 | Analysis of gas dissolved in oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03226642A true JPH03226642A (en) | 1991-10-07 |
Family
ID=12105297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2324890A Pending JPH03226642A (en) | 1990-01-31 | 1990-01-31 | Analysis of gas dissolved in oil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03226642A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001235403A (en) * | 2000-02-22 | 2001-08-31 | Fuji Electric Co Ltd | Apparatus for injecting sample oil for gas analysis in vial |
-
1990
- 1990-01-31 JP JP2324890A patent/JPH03226642A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001235403A (en) * | 2000-02-22 | 2001-08-31 | Fuji Electric Co Ltd | Apparatus for injecting sample oil for gas analysis in vial |
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