JPS5846045B2 - Abnormality monitoring device for oil-filled equipment - Google Patents

Description

【発明の詳細な説明】 本発明は、例えば変圧器、整流器、コンデンサ等絶縁油
を充填した油入機器の油中に溶存しているガスを例えば
可燃性ガスの検知器を用いて察知し、これら機器の内部
の異常監視装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention detects gas dissolved in the oil of oil-filled equipment filled with insulating oil, such as transformers, rectifiers, and capacitors, using a flammable gas detector, The present invention relates to abnormality monitoring devices inside these devices.

油入電気機器に於て、内部に過熱又は部分放電等の異常
が発生すると、絶縁油あるいは固体絶縁物が分解してガ
ス、例えば低分子の可燃性ガス成分を生成することは良
く知られている。It is well known that when an abnormality such as overheating or partial discharge occurs inside oil-filled electrical equipment, the insulating oil or solid insulation decomposes and generates gas, such as low-molecular flammable gas components. There is.

そして、これらのガスの大部分は絶縁油中に溶解してい
る。Most of these gases are dissolved in the insulating oil.

従って、油中に溶解しているガス成分を検知すれば、こ
れら機器内部の異常の有無を知ることができる。Therefore, by detecting gas components dissolved in oil, it is possible to know whether there is an abnormality inside these devices.

しかし、油中に溶解しているガスを直接測定できる装置
が無いため、油から一旦ガス成分を分離抽出し、抽出し
たガスを例らかの方法で検知するという方式をとらなけ
ればならない不都合がある。However, since there is no device that can directly measure the gas dissolved in oil, there is the inconvenience of having to first separate and extract the gas components from the oil and then detect the extracted gas using a conventional method. be.

油中に溶解しているガスの分離手段は、トリチェリ一式
、テプラーポンプ式、ピストン式（特公昭５０−８７６
３号公報参照）あるいは高分子膜による透過式（実公昭
４８−３５３７２号公報参照）等、種々の方式がある。Separation means for gas dissolved in oil include Torricelli set, Teppler pump type, and piston type (Special Publication Publication No. 50-876).
There are various methods, such as a permeation method using a polymer membrane (see Japanese Utility Model Publication No. 35372/1983).

一方、油から分離したガスの検知手段としてガスクロマ
トグラフィによるものが一般的に使用されているが、油
からのガスの分離と検知を一体化し、油入機器に直接取
り付けて異常を監視する装置とするには上記検知方式で
はその構造から考え極めて高価となる。On the other hand, gas chromatography is generally used as a means of detecting gas separated from oil, but there is also a device that integrates the separation and detection of gas from oil and is directly attached to oil-immersed equipment to monitor abnormalities. Therefore, the above detection method is extremely expensive considering its structure.

この方、穴以外の検知手段としては、実公昭４９−３２
０９０号公報にみられるように、可燃性ガスに接触する
と、内部インピーダンスが変化する半導体素子による方
式（以下半噂体方式と略す）が提案されている。In this case, as a detection means other than holes,
As seen in Japanese Patent No. 090, a method using a semiconductor element whose internal impedance changes when it comes into contact with a combustible gas (hereinafter abbreviated as semi-transparent method) has been proposed.

更に、上記方式以外の可燃性ガス検知手段として、適当
な温度に加熱された触媒上に可燃性ガスを含んだ空気を
触媒の表面に吸着させ、空気中の酸素と反応し接触燃焼
を生じることを利用して金属体を加熱し、この金属体の
電気抵抗の変化を測定し可燃性ガスを検知する方式（以
下接触燃焼方式と略す）の応用も考えられる。Furthermore, as a combustible gas detection means other than the above method, air containing flammable gas is adsorbed onto the surface of a catalyst heated to an appropriate temperature, and reacts with oxygen in the air to cause catalytic combustion. It is also conceivable to apply a method (hereinafter abbreviated as catalytic combustion method) in which combustible gas is detected by heating a metal body using heat and measuring changes in the electrical resistance of the metal body.

このような半導体及び接触燃焼方式による可燃性ガス警
報器は種々市販されているが、いずれも大気中の可燃性
ガスを検知することを目的としており、比較的小さな一
定容器中の可燃性ガスを精度良く検知するのに応用する
には種々の問題がある。There are various types of combustible gas alarms using semiconductor and catalytic combustion methods on the market, but all of them are designed to detect flammable gas in the atmosphere, and are designed to detect flammable gas in a relatively small container. There are various problems in applying this method to accurate detection.

例えば、再現性良く可燃性ガス濃度を検出するにはいず
れの方式でも検知素子をある一定の温度に加熱安定化し
た状態で使用しなければならず、可燃性ガス濃度を測定
したいときにのみ警報器の電源を入れると０点の安定が
悪くかつ、濃度との正常な出力特性が得られず信頼性が
無い。For example, in order to detect the concentration of flammable gas with good reproducibility, the detection element must be heated to a certain temperature and stabilized before use, and an alarm is issued only when the concentration of combustible gas is to be measured. When the power to the device is turned on, the zero point is not stable and normal output characteristics with respect to concentration cannot be obtained, making it unreliable.

更に、検知素子を密閉状態にして連続加熱し安定化しう
とすると容器内に熱がこもり好ましくない等の問題があ
る。Furthermore, if an attempt is made to stabilize the sensing element by continuously heating it in a sealed state, there are problems such as undesirable heat buildup inside the container.

又、従来の技術に於て、ガス濃度を測定する際の実際的
な使用方法は、例えば特開昭５１−４１８２３号公報に
みられるように、キャノアーガスを用いて検知素子に可
燃性ガスを含んだガスを送り込み測定するのが一般的で
ある。In addition, in the conventional technology, a practical method for measuring gas concentration is to apply a flammable gas to the detection element using canoa gas, as shown in, for example, Japanese Patent Laid-Open No. 51-41823. It is common to send in a gas containing it for measurement.

しかし、従来の方式ではこれを自動化しようとすると、
装置が複雑となりかつ高価になるし、又、キャリアーガ
スボンベの保守も必要となる。However, if you try to automate this using traditional methods,
The equipment becomes complex and expensive, and maintenance of the carrier gas cylinder is also required.

本発明の目的は、前記した問題点を有する可燃性ガス検
知器で、油から分離したガスを簡単な構造で確実に検知
が行え油入機器の保守を容易にした信頼性の高い油入機
器内部の異常監視装置を提供することにある。An object of the present invention is to provide a combustible gas detector having the above-mentioned problems, which can reliably detect gas separated from oil with a simple structure, and provides highly reliable oil-filled equipment that facilitates maintenance of the oil-filled equipment. The purpose of the present invention is to provide an internal abnormality monitoring device.

上記の目的を達成するため、本発明では、ガス溜め室内
のガスを検知素子に接触させる操作を行うため、開閉弁
を介して、該ガス溜め室と検知素子を納めた室を設け、
ガス分離装置に取り付けたものである。In order to achieve the above object, the present invention provides a chamber containing the gas reservoir chamber and the detection element via an on-off valve in order to bring the gas in the gas reservoir chamber into contact with the detection element.
It is attached to a gas separation device.

以下、本発明の作動原理を図面により説明する。The operating principle of the present invention will be explained below with reference to the drawings.

本発明の基本構造の例を第１図に示しており、１は油か
ら分離した可燃性ガスなどの被検知ガスの入いっている
ガス溜め室、３は開閉弁であり、例えば３方尚の電磁弁
を用いている。An example of the basic structure of the present invention is shown in FIG. 1, where 1 is a gas reservoir containing a gas to be detected such as flammable gas separated from oil, and 3 is an on-off valve. A solenoid valve is used.

８は可燃性ガス検知素子８ａを配置する検知室、９は検
知素子８ａに連らなる検知器本体。8 is a detection chamber in which a combustible gas detection element 8a is arranged, and 9 is a detector main body connected to the detection element 8a.

１０は例えば、高分子膜やピストン式などによって油中
に溶解しているガスを油から分離する分離装置である。10 is a separation device that separates gas dissolved in oil from oil using, for example, a polymer membrane or a piston type.

ガスを測定しない通常の場合、検知素子８ａは連続的に
加熱されており、また開閉弁３として用いる３方尚の電
磁弁は通電されていない。In the normal case when gas is not measured, the detection element 8a is continuously heated, and the three solenoid valves used as the on-off valves 3 are not energized.

この状態での開閉弁３の流通経路の概略を第２図のイに
示したがこれかられかるように検知素子８ａの配置され
ている検知室８は大気開放下にある。A schematic diagram of the flow path of the on-off valve 3 in this state is shown in FIG.

又、この状態では、ガス溜め室１と検知室８はバネ６に
よって鉄製摺動棒が押し下げられシール材７ａによって
しゃ断されている。Further, in this state, the iron sliding rod is pushed down by the spring 6, and the gas reservoir chamber 1 and the detection chamber 8 are shut off by the sealing material 7a.

次に、ガス濃度の測定例を述べる。Next, an example of gas concentration measurement will be described.

まず、ガス溜め室１に分離装置１０で油から分離した可
燃性ガスを含んだガスを弁２ａから入れ更に弁２ｂを開
き大気圧まで空気を入れ弁２ａ 、 ２ｂを閉じ、開閉
弁３として用いる電磁弁の電磁コイル４に通電する。First, gas containing flammable gas separated from oil by the separator 10 is put into the gas reservoir chamber 1 through the valve 2a, and then the valve 2b is opened and air is introduced to atmospheric pressure, the valves 2a and 2b are closed, and the valve is used as the on-off valve 3. The electromagnetic coil 4 of the electromagnetic valve is energized.

そうすると、鉄製摺動棒５が磁石の作用により押し上げ
られガス泊め室１と検知室８が流通し、これと同時に７
ｂのシール材が大気へ通じる経路をふさぎ、ガス溜め室
１および検知室８が大気としゃ断される。Then, the iron sliding rod 5 is pushed up by the action of the magnet, causing the gas accommodation chamber 1 and the detection chamber 8 to flow, and at the same time, the 7
The sealing material b blocks the path leading to the atmosphere, and the gas reservoir chamber 1 and the detection chamber 8 are cut off from the atmosphere.

したがって、ガス溜め室１の可燃性ガスを含んだガスは
検知室８へ自然に拡散してゆき、この系全体がある一定
の平衡濃度に達し、検知素子８ａはその濃度に対応した
出力値を検知器本体９に示すようになる。Therefore, the gas containing combustible gas in the gas storage chamber 1 naturally diffuses into the detection chamber 8, and the entire system reaches a certain equilibrium concentration, and the detection element 8a outputs an output value corresponding to that concentration. As shown in the detector body 9.

なお、第２図の口に開閉弁３の電磁コイル４へ通電した
ときの流通経路の概略を示した。Note that FIG. 2 schematically shows the flow path when the electromagnetic coil 4 of the on-off valve 3 is energized.

以上は、検知室に検知素子を１ヶ取り付けた場合を例と
して示したが、たとえば、炭化水素系ガスにより高感度
な検知素子と一酸化炭素により高感度な検知素子を同時
に検知室に設けても良く、油入機器の内部に異常があっ
た場合絶縁油のみが分解しているのか、絶縁材料が分解
しているのかの判別をすることも可能であり、より高度
の異常監視装置となる。The above example shows the case where one detection element is installed in the detection chamber, but for example, a detection element with high sensitivity for hydrocarbon gas and a detection element with high sensitivity for carbon monoxide may be installed in the detection chamber at the same time. If there is an abnormality inside the oil-immersed equipment, it can be determined whether only the insulating oil or the insulating material has decomposed, making it a more advanced abnormality monitoring device. .

このように、検知素子を１ヶ取り付けることに限定され
るものでは無く特定のガスに高感度な検知素子を２ヶ以
上取付けても良い。In this way, the present invention is not limited to the installation of one detection element, and two or more detection elements highly sensitive to a specific gas may be installed.

本発明では従来の技術に比べて極めて構造が簡単となり
自動化が容易で、かつ検知素子は常に安定化された状態
でガスを検知するためガス濃度と出力特性の再現性が極
めて良好で信頼性も高くなる。The present invention has an extremely simple structure and is easy to automate compared to conventional technology, and since the sensing element always detects gas in a stabilized state, the reproducibility of gas concentration and output characteristics is extremely good and reliability is high. It gets expensive.

なお、第１図の実施例では開閉弁３として用いる電磁弁
を１ケ使用した場合を示したが、この代り第３図に示す
ごとく、ガス溜め室と検知室の間、及び検知室と大気間
にそれぞれ作用が相反する開閉弁を用いて構成すること
もできる。The embodiment shown in Fig. 1 shows the case where one solenoid valve is used as the on-off valve 3, but instead, as shown in Fig. 3, there is a It is also possible to use on-off valves with opposing actions between them.

すなわち、開閉弁として用いられる第１及び第２の２方
向電磁弁３ａ、３ｂはそれぞれ第４図、第５図に示すよ
うにイは非通電時でガス溜め室１と検知素子８ａを配置
した検知室８とが開閉弁３ａとして用いる２方向電磁弁
によってしゃ断されかつ、検知室８は開閉弁３ｂとして
用いる２方向電磁弁を介して大気開放下にある。That is, the first and second two-way solenoid valves 3a and 3b used as on-off valves are not energized and the gas reservoir chamber 1 and the detection element 8a are arranged as shown in FIGS. 4 and 5, respectively. The detection chamber 8 is shut off by a two-way solenoid valve used as the on-off valve 3a, and the detection chamber 8 is opened to the atmosphere via the two-way solenoid valve used as the on-off valve 3b.

口は通電時で、ガス溜め室１と検知室８は流通しかつ、
ガス溜め室１検知室８は大気としゃ断される。When the port is energized, gas reservoir chamber 1 and detection chamber 8 are in communication with each other, and
The gas storage chamber 1 and detection chamber 8 are cut off from the atmosphere.

なお、検知素子８ａは第１図でも述べたごとく連続加熱
され安定化されている。Note that the sensing element 8a is continuously heated and stabilized as described in FIG.

以上のような構造を有する２方向電磁弁を２ケ用いて同
時に作動させる方式でも第１図と同様に本発明の効果は
達成できる。The effects of the present invention can also be achieved in the same manner as in FIG. 1 by using two two-way solenoid valves having the above structure and operating them simultaneously.

しかも３ａ、８゜３ｂが一列に配置されるため交換が容
易に行える。Moreover, since 3a and 8.degree. 3b are arranged in a row, replacement can be easily performed.

本発明の例えば第１図に示した装置を変圧器の異常監視
に適用した場合の例を第６図に示しており、鉄心１３、
コイル１４を配置し、絶縁油１５を充填した変圧器ケー
ス１２に弁２ｃ、２ｄを介して油循環ポンプ１１を連結
し、これに第１図に示した異常監視装置を取り付けたも
のである。An example in which the device of the present invention shown in FIG. 1 is applied to abnormality monitoring of a transformer is shown in FIG. 6, in which the iron core 13,
An oil circulation pump 11 is connected via valves 2c and 2d to a transformer case 12 in which a coil 14 is disposed and filled with insulating oil 15, and an abnormality monitoring device shown in FIG. 1 is attached to this.

本発明のような装置を構成し、油から分離したガスを適
時検知すれば、油入機器内部の異常を監視でき、油入機
器の保守が容易となる。By configuring a device like the present invention and detecting gas separated from oil in a timely manner, abnormalities inside oil-filled equipment can be monitored, and maintenance of oil-filled equipment becomes easy.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の異常監視装置の一実施例を示す概略縦
断面図、第２図イ、酬ま第１図に用いる開閉弁の動作状
況を示す概略図、第３図は本発明の異常監視装置の他の
例を示す概略図、第４図及び第５図イ２０はそれぞれ第
３図に用いる開閉弁の動作状況を示す概略図、第６図は
第１図の異常監視装置を変圧器に適用した例を示す概略
図である。 １・・・・・・ガス溜め室、３，３ａ、３ｂ・・・・・
・開閉弁、８・・・・・・検知室、８ａ・・・・・・検
知素子、１０・・・・・・ガス分離装置。FIG. 1 is a schematic vertical sectional view showing an embodiment of the abnormality monitoring device of the present invention, FIG. 4 and 5 are schematic diagrams showing other examples of the abnormality monitoring device. A 20 is a schematic diagram showing the operation status of the on-off valve used in FIG. 3, and FIG. It is a schematic diagram showing an example applied to a transformer. 1... Gas storage room, 3, 3a, 3b...
- Opening/closing valve, 8...detection chamber, 8a...detection element, 10...gas separation device.

Claims (1)

【特許請求の範囲】 １ 油入機器内の絶縁油からガスを分離する分離装置と
、該分離装置に連らなるガス溜め室と、該ガス溜め室に
連結すると共に内部に検知素子を配置する検知室と、前
記検知室内をガス溜め室内と大気中に交互に連通させる
開閉弁とから構成し、前記開閉弁は、ガス測定時のみガ
ス溜め室と検知室を流通させ且つ常時は検知室内を大気
中へ開放することを特徴とする油入機器の異常監視装置
。 ２、特許請求の範囲第１項において、前記開閉弁として
３方向電磁弁を用いたことを特徴とする油入機器の異常
監視装置。 ３ 特許請求の範囲第１項において、前記開閉弁には前
記ガス溜め室と検知室間に配されガス測定時に開かれる
第１の２方向電磁弁と、前記検知室と大気中間に設けら
れガスの測定時に閉じられる第２の２方向電磁弁とを用
いたことを特徴とする油入機器の異常監視装置。[Claims] 1. A separation device that separates gas from insulating oil in oil-filled equipment, a gas reservoir chamber connected to the separation device, and a detection element connected to the gas reservoir chamber and arranged inside. It is composed of a detection chamber and an on-off valve that alternately communicates the detection chamber with the gas reservoir chamber and the atmosphere. An abnormality monitoring device for oil-filled equipment that is open to the atmosphere. 2. An abnormality monitoring device for oil-filled equipment according to claim 1, characterized in that a three-way solenoid valve is used as the on-off valve. 3. In claim 1, the opening/closing valve includes a first two-way solenoid valve disposed between the gas storage chamber and the detection chamber and opened when gas is measured, and a first two-way solenoid valve disposed between the detection chamber and the atmosphere to open the gas An abnormality monitoring device for oil-immersed equipment, characterized in that it uses a second two-way solenoid valve that is closed when measuring.