JP2011075425A - Method of monitoring oil leakage, and oil leakage monitoring device - Google Patents

Method of monitoring oil leakage, and oil leakage monitoring device Download PDF

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JP2011075425A
JP2011075425A JP2009227674A JP2009227674A JP2011075425A JP 2011075425 A JP2011075425 A JP 2011075425A JP 2009227674 A JP2009227674 A JP 2009227674A JP 2009227674 A JP2009227674 A JP 2009227674A JP 2011075425 A JP2011075425 A JP 2011075425A
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distance
oil leakage
adsorbing sheet
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JP5625303B2 (en
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Katsuyuki Makino
勝幸 牧野
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JFE Steel Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for precisely monitoring oil leakage using a simple means. <P>SOLUTION: An oil suction sheet 2 is disposed around a lower portion of equipment 1 to which oil is sealed; a distance measuring device 3 is arranged at the upper portion of the oil suction sheet to measure distance to an upper surface of the oil suction sheet; measurement value of the distance is compared with a preset threshold; and a warning is issued by determining that oil has leaked, when the measurement value is reduced as compared with the threshold. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、トランス，シリンダー等の油を封入した機器の油漏出を監視する方法および装置に関するものである。   The present invention relates to a method and an apparatus for monitoring oil leakage of equipment in which oil such as a transformer and a cylinder is sealed.

油を封入した機器から油（たとえばトランスの絶縁油，シリンダーの作動油等）が漏出すると、様々な問題が発生する。たとえば各種の設備に組み込まれた稼働中の機器から油が漏出すると、その設備の故障を引き起こすばかりでなく、設備の安全性に悪影響を及ぼす。また倉庫等に保管中の機器から油が漏出すると、周辺の環境汚染を引き起こす。したがって、油漏出が発生すると直ちにその機器の補修を行なう必要がある。   When oil (for example, insulating oil for a transformer, hydraulic fluid for a cylinder, etc.) leaks from a device in which the oil is sealed, various problems occur. For example, if oil leaks from operating equipment incorporated in various facilities, it not only causes failure of the facility but also adversely affects the safety of the facility. In addition, if oil leaks from equipment stored in a warehouse, etc., it will cause environmental pollution in the surrounding area. Therefore, it is necessary to repair the equipment as soon as an oil leak occurs.

そこで、油漏出を監視する技術が種々検討されている。
たとえば特許文献１には、油膜からの反射光を受光し、さらに３原色の各波長に対する特性を解析して油漏出を判定する技術が開示されている。この技術は、水面に油膜が浮遊している場合に有効であるが、水が存在しない場所への油漏出を判定する精度は劣る。
特許文献２には、着色シートを使用して油漏出を監視する技術が開示されている。この着色シートは、油と接触すると変色する油溶性染料を染み込ませたシートである。しかし着色シートの変色を監視するための有効な装置は開発されておらず、監視員の定期的な見回り点検によって着色シートの変色を監視せざるを得ない。したがって、油漏出の判定精度の大幅な向上は期待できない。 Therefore, various techniques for monitoring oil leakage have been studied.
For example, Patent Document 1 discloses a technique for receiving oil reflected from an oil film and analyzing the characteristics of the three primary colors for each wavelength to determine oil leakage. This technique is effective when an oil film is floating on the water surface, but the accuracy of determining oil leakage to a place where no water is present is poor.
Patent Document 2 discloses a technique for monitoring oil leakage using a colored sheet. This colored sheet is a sheet impregnated with an oil-soluble dye that changes color when contacted with oil. However, an effective device for monitoring the discoloration of the colored sheet has not been developed, and the discoloration of the colored sheet has to be monitored by a regular inspection of the supervisor. Therefore, a significant improvement in the accuracy of oil leakage determination cannot be expected.

特許文献３には、漏出した油をカーボン粉末で黒く変色させて、油漏出を監視する技術が開示されている。この技術では、ＴＶカメラを使用するが、撮影機器の解像度や画像の鮮明さ等が油漏出の判定に影響を及ぼすので、判定の精度が低下する惧れがある。   Patent Document 3 discloses a technique for monitoring oil leakage by changing the color of leaked oil to black with carbon powder. In this technique, a TV camera is used. However, since the resolution of the photographing device, the sharpness of the image, and the like affect the determination of oil leakage, there is a concern that the accuracy of the determination may be reduced.

実開平4-8940号公報Japanese Utility Model Publication No. 4-8940 特開2006-216715号公報JP 2006-216715 A 特開2005-156195号公報JP 2005-156195 A

本発明は、油漏出を簡便な手段で精度良く監視する方法および装置を提供することを目的とする。   An object of the present invention is to provide a method and an apparatus for accurately monitoring oil leakage with simple means.

発明者は、油を封入した機器（たとえばトランス，シリンダー等）からの油漏出を監視する技術を検討した。その結果、油を吸着するとその体積が膨張する特性を有するシート（以下、油吸着シートという）が有効に使用できることが分かった。すなわち、油漏出の監視対象となる機器の下方周辺に油吸着シートを配置し、その油吸着シートが油を吸着することによって生じる体積膨張を検知することによって、油漏出を判定することが可能である。   The inventor examined a technique for monitoring oil leakage from a device (for example, a transformer, a cylinder, etc.) enclosing oil. As a result, it was found that a sheet having a characteristic that its volume expands when oil is adsorbed (hereinafter referred to as an oil adsorbing sheet) can be used effectively. That is, it is possible to determine an oil leak by arranging an oil adsorbing sheet in the lower periphery of the equipment to be monitored for oil leak and detecting volume expansion caused by the oil adsorbing sheet adsorbing oil. is there.

そこで、油吸着シートの体積膨張を検知する技術について、さらに詳細に研究した。そして、油吸着シートの体積が膨張すると、その油吸着シートの上面が上昇することに着目した。油吸着シートの上面を観察することによって油漏出の判定を可能にするために、油吸着シートの上方の所定の位置に距離測定装置を配設して固定し、その距離測定装置と油吸着シートの上面との距離を測定する。その距離の測定値が短くなれば、油吸着シートの体積が膨張したことを意味する。このようにして油漏出の判定が可能である。   Therefore, the technology for detecting the volume expansion of the oil adsorbing sheet was studied in more detail. And when the volume of the oil adsorption sheet expanded, attention was paid to the upper surface of the oil adsorption sheet rising. In order to enable determination of oil leakage by observing the upper surface of the oil adsorbing sheet, a distance measuring device is disposed and fixed at a predetermined position above the oil adsorbing sheet, and the distance measuring device and the oil adsorbing sheet are fixed. Measure the distance from the top surface of If the measured value of the distance becomes shorter, it means that the volume of the oil adsorbing sheet has expanded. In this way, oil leakage can be determined.

本発明は、これらの知見に基づいてなされたものである。
すなわち本発明は、油を封入した機器の下方周辺に油吸着シートを配置し、油吸着シートの上方に距離測定装置を配設して油吸着シートの上面との距離を測定し、距離の測定値と予め設定されたしきい値とを比較して、測定値がしきい値より短縮されときに油漏出が発生したと判定して警報を発する油漏出監視方法である。 The present invention has been made based on these findings.
That is, according to the present invention, an oil adsorbing sheet is arranged around the lower part of a device filled with oil, a distance measuring device is arranged above the oil adsorbing sheet, and the distance from the upper surface of the oil adsorbing sheet is measured. This is an oil leakage monitoring method in which a value is compared with a preset threshold value, and it is determined that an oil leakage has occurred when a measured value is shortened below the threshold value, and an alarm is issued.

また本発明は、油を封入した機器の下方周辺に配置される油吸収シートと、油吸着シートの上方に配設されて油吸着シートの上面との距離を測定する距離測定装置と、距離の測定値と予め設定されたしきい値とを比較し、さらに測定値が前記しきい値より短縮されたときに油漏出が発生したと判定する演算装置と、油漏出が発生したときに警報を表示する表示装置と、を有する油漏出監視装置である。   The present invention also provides a distance measuring device for measuring a distance between an oil absorbing sheet disposed in the lower periphery of a device enclosing oil and a top surface of the oil absorbing sheet disposed above the oil adsorbing sheet; An arithmetic unit that compares the measured value with a preset threshold value and determines that an oil leak has occurred when the measured value is shortened below the threshold value, and an alarm when an oil leak has occurred. An oil leakage monitoring device having a display device for displaying.

本発明によれば、油を封入した様々な機器の油漏出を、簡便な手段でかつ高い精度で判定できる。しかも、その機器が稼働中であっても保管中であっても、油漏出を監視することが可能である。   According to the present invention, it is possible to determine oil leakage of various devices filled with oil with simple means and high accuracy. Moreover, it is possible to monitor oil leakage whether the device is in operation or being stored.

本発明を適用する装置の例を模式的に示す配置図である。It is a layout view schematically showing an example of an apparatus to which the present invention is applied.

図１は、本発明を適用する装置の例を模式的に示す配置図である。油を封入した機器１の下方周辺に油吸着シート２を配置する。油吸着シート２は、ポリエステル繊維を織ったポリエステル薄布体，ウール繊維を織ったウール薄布体，ポリプロピレン繊維を織ったポリプロピレン薄布体を積層したものであり、油は吸着するが、水は吸着しない。そのため、屋外に設置された機器の油漏出を監視する場合に、油吸着シート２を屋外で使用しても雨水を吸着せず、漏出した油のみを吸着する。したがって、屋外に設置された機器の油漏出を支障なく監視できる。なお屋内で油吸着シート２を使用する場合には、雨水の影響は皆無であるから、何ら問題なく使用できる。   FIG. 1 is a layout diagram schematically showing an example of an apparatus to which the present invention is applied. An oil adsorbing sheet 2 is arranged around the lower part of the device 1 in which oil is enclosed. The oil adsorbing sheet 2 is formed by laminating a polyester thin cloth body woven with polyester fibers, a wool thin cloth body woven with wool fibers, and a polypropylene thin cloth body woven with polypropylene fibers. Does not adsorb. Therefore, when monitoring the oil leakage of the equipment installed outdoors, even if the oil adsorption sheet 2 is used outdoors, it does not adsorb rainwater and adsorbs only the leaked oil. Therefore, it is possible to monitor oil leakage of equipment installed outdoors without any trouble. In addition, when using the oil adsorption sheet 2 indoors, since there is no influence of rain water, it can be used without any problem.

なお、ポリエステル薄布体，ウール薄布体，ポリプロピレン薄布体は、それぞれ単体で使用しても良いが、２種以上を併用することが好ましい。いずれの場合も、ポリエステル薄布体，ウール薄布体，ポリプロピレン薄布体を積層して、所定の厚さの油吸着シート２を得る。
油吸着シート２の上方に距離測定装置３を配設する。距離測定装置３は、非接触式（たとえばレーザー距離計等）や接触式（たとえば深さゲージ等）の従来から知られている技術が使用できる。ただし、油漏出の判定精度を高めるためには、非接触式の距離測定装置を使用することが好ましい。その理由は、接触式の距離測定装置では油吸着シートの体積膨張を検出する精度が劣るからである。 In addition, although a polyester thin cloth body, a wool thin cloth body, and a polypropylene thin cloth body may each be used individually, it is preferable to use 2 or more types together. In any case, a thin polyester cloth, a thin wool cloth, and a thin polypropylene cloth are laminated to obtain the oil adsorbing sheet 2 having a predetermined thickness.
A distance measuring device 3 is disposed above the oil adsorbing sheet 2. As the distance measuring device 3, a conventionally known technique such as a non-contact type (for example, a laser distance meter) or a contact type (for example, a depth gauge) can be used. However, it is preferable to use a non-contact distance measuring device in order to increase the accuracy of oil leakage determination. This is because the contact-type distance measuring device is inferior in detecting the volume expansion of the oil adsorbing sheet.

以下では、距離測定装置３として非接触式の距離測定装置を使用する例について説明する。
図１に示すように、油吸着シート２の上方の所定の位置に距離測定装置３を配設して固定し、その距離測定装置３と油吸着シート２の上面との距離を測定する。油吸着シート２が油を吸着して体積が膨張（すなわち上面が上昇）すると、距離測定装置３で測定した油吸着シート２の上面との距離が短縮される。 Below, the example which uses a non-contact-type distance measuring device as the distance measuring device 3 is demonstrated.
As shown in FIG. 1, a distance measuring device 3 is disposed and fixed at a predetermined position above the oil adsorbing sheet 2, and the distance between the distance measuring device 3 and the upper surface of the oil adsorbing sheet 2 is measured. When the oil adsorbing sheet 2 adsorbs oil and the volume expands (that is, the upper surface rises), the distance from the upper surface of the oil adsorbing sheet 2 measured by the distance measuring device 3 is shortened.

距離測定装置３による測定値は演算装置４に伝送される。一方で、油漏出の判定基準となるしきい値を予め設定しておき、演算装置４がそのしきい値と距離測定装置３による測定値とを比較する。そして、距離測定装置３と油吸着シート２の上面との距離の測定値がしきい値より短くなったときに、油漏出が発生したと判定する。
油漏出を判定した信号は表示装置５に伝送される。表示装置５は、油漏出の警報を発するものであり、画面に警報を表示する、音声で警報を知らせる、ライトを点滅させる、サイレンを鳴らす等の従来から知られている技術が使用できる。 A measurement value obtained by the distance measuring device 3 is transmitted to the arithmetic device 4. On the other hand, a threshold value that is a criterion for oil leakage is set in advance, and the arithmetic device 4 compares the threshold value with a measured value by the distance measuring device 3. Then, when the measured value of the distance between the distance measuring device 3 and the upper surface of the oil adsorbing sheet 2 becomes shorter than the threshold value, it is determined that oil leakage has occurred.
A signal for determining oil leakage is transmitted to the display device 5. The display device 5 issues an oil leakage alarm, and conventionally known techniques such as displaying an alarm on a screen, informing the alarm by voice, blinking a light, and sounding a siren can be used.

以上に説明した通り、油を封入した様々な機器の油漏出を、簡便な手段でかつ高い精度で判定できる。しかも、その機器が稼働中であっても保管中であっても、また屋内あるいは屋外を問わず、油漏出を監視することが可能である。その結果、作業員は迅速かつ適確に対応できる。   As described above, it is possible to determine oil leakage of various devices filled with oil with simple means and high accuracy. Moreover, it is possible to monitor oil leakage whether the device is in operation or being stored, whether indoors or outdoors. As a result, workers can respond quickly and accurately.

図1に示す油吸着シート２，距離測定装置３，演算装置４，表示装置５を用いて油漏出を監視する実験を行なった。距離測定装置３はレーザー距離計を使用し、表示装置５はパソコンの画面を使用した。実験の手順とその結果について、以下に説明する。
油吸着シート２（カクイ株式会社製，縦500mm, 横500mm，厚さ12mm）を床面に敷き、その油吸着シート２の上方に距離測定装置３を配設した。距離測定装置３と油吸着シート２の上面との距離を100mmとして、距離測定装置３を固定した。一方で、油漏出の判定基準となるしきい値を95mmに設定した。そして、トランスで使用される絶縁油を単位面積あたり6000cm3／ｍ2の割合で油吸着シート２の上面に流して、絶縁油を油吸着シート２に吸着させたところ、油吸着シート２の体積が膨張した。その結果、距離測定装置３と油吸着シート２の上面との距離の測定値が94mmとなり、パソコンの画面に油漏出発生が表示された。 An experiment for monitoring oil leakage was performed using the oil adsorbing sheet 2, the distance measuring device 3, the arithmetic device 4, and the display device 5 shown in FIG. The distance measuring device 3 used a laser distance meter, and the display device 5 used a personal computer screen. The procedure of the experiment and the results will be described below.
An oil adsorbing sheet 2 (manufactured by Kakui Co., Ltd., length 500 mm, width 500 mm, thickness 12 mm) was laid on the floor, and a distance measuring device 3 was disposed above the oil adsorbing sheet 2. The distance measuring device 3 was fixed by setting the distance between the distance measuring device 3 and the upper surface of the oil adsorbing sheet 2 to 100 mm. On the other hand, the threshold value used as a criterion for oil leakage was set to 95 mm. Then, when the insulating oil used in the transformer is caused to flow on the upper surface of the oil adsorbing sheet 2 at a rate of 6000 cm 3 / m 2 per unit area, the insulating oil is adsorbed on the oil adsorbing sheet 2. Expanded. As a result, the measured value of the distance between the distance measuring device 3 and the upper surface of the oil adsorbing sheet 2 was 94 mm, and the occurrence of oil leakage was displayed on the screen of the personal computer.

次に、絶縁油を吸着した油吸着シート２を取り除き、同寸法の新たな油吸着シート２を敷いた。距離測定装置３と油吸着シート２の上面との距離を100mmとして距離測定装置３を固定し、油漏出の判定基準となるしきい値を95mmに設定した。そして、水を6000cm3／ｍ2の割合で油吸着シート２の上面に流したが、油吸着シート２に吸着されず、周辺の床面に流出した。その結果、距離測定装置３と油吸着シート２の上面との距離の測定値が100mmのままで変化せず、パソコンの画面に油漏出発生は表示されなかった。 Next, the oil adsorbing sheet 2 adsorbing the insulating oil was removed, and a new oil adsorbing sheet 2 having the same dimensions was laid. The distance measuring device 3 was fixed by setting the distance between the distance measuring device 3 and the upper surface of the oil adsorbing sheet 2 to 100 mm, and the threshold value for determining the oil leakage was set to 95 mm. Then, water was flowed to the upper surface of the oil adsorbing sheet 2 at a rate of 6000 cm 3 / m 2 , but was not adsorbed by the oil adsorbing sheet 2 and flowed out to the surrounding floor surface. As a result, the measured value of the distance between the distance measuring device 3 and the upper surface of the oil adsorbing sheet 2 remained unchanged at 100 mm, and the occurrence of oil leakage was not displayed on the screen of the personal computer.

以上に説明した通り、油漏出を簡便な手段でかつ高い精度で判定できることが確かめられた。しかも屋外で使用しても雨水の影響を受けないので、屋外あるいは屋内を問わず油漏出を監視できることが確かめられた。   As described above, it was confirmed that oil leakage can be determined with simple means and high accuracy. Moreover, since it is not affected by rainwater even when used outdoors, it was confirmed that oil leakage can be monitored both outdoors and indoors.

機器が稼働中であっても保管中であっても、油漏出を簡便な手段でかつ高い精度で判定でき、産業上格段の効果を奏する。   Whether the equipment is in operation or being stored, oil leakage can be determined with a simple means and with high accuracy, and this has a remarkable industrial effect.

１ 油を封入した機器
２ 油吸着シート
３ 距離測定装置
４ 演算装置
５ 表示装置
DESCRIPTION OF SYMBOLS 1 Equipment which enclosed oil 2 Oil adsorption sheet 3 Distance measuring device 4 Arithmetic device 5 Display device

Claims (2)

油を封入した機器の下方周辺に油吸着シートを配置し、前記油吸着シートの上方に距離測定装置を配設して前記油吸着シートの上面との距離を測定し、前記距離の測定値と予め設定されたしきい値とを比較して、前記測定値が前記しきい値より短縮されたときに油漏出が発生したと判定して警報を発することを特徴とする油漏出監視方法。   An oil adsorbing sheet is arranged around the lower part of the device enclosing oil, a distance measuring device is arranged above the oil adsorbing sheet, and the distance from the upper surface of the oil adsorbing sheet is measured, and the measured value of the distance An oil leakage monitoring method comprising: comparing with a preset threshold value, determining that an oil leakage has occurred when the measured value is shortened below the threshold value, and issuing an alarm. 油を封入した機器の下方周辺に配置される油吸収シートと、前記油吸着シートの上方に配設されて前記油吸着シートの上面との距離を測定する距離測定装置と、前記距離の測定値と予め設定されたしきい値とを比較し、さらに前記測定値が前記しきい値より短縮されたときに油漏出が発生したと判定する演算装置と、前記油漏出が発生したときに警報を表示する表示装置と、を有することを特徴とする油漏出監視装置。
A distance measuring device for measuring a distance between an oil absorbing sheet disposed in a lower periphery of a device enclosing oil and a top surface of the oil adsorbing sheet disposed above the oil adsorbing sheet; and a measured value of the distance And an arithmetic unit that determines that an oil leak has occurred when the measured value is shortened below the threshold, and an alarm when the oil leak has occurred. An oil leakage monitoring device comprising: a display device for displaying.
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Publication number Priority date Publication date Assignee Title
JP2014045114A (en) * 2012-08-28 2014-03-13 Hitachi Industrial Equipment Systems Co Ltd Oil filled transformer
CN105547612A (en) * 2016-01-29 2016-05-04 湖北欢达电气股份有限公司 Transformer leakage testing device
CN113586829A (en) * 2021-08-03 2021-11-02 西安西电变压器有限责任公司 Electrical equipment and charge-discharge pressure monitoring device

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CN106404318A (en) * 2016-08-31 2017-02-15 南京理工大学 Indoor distribution transformer oil leakage supervision system

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JP2014045114A (en) * 2012-08-28 2014-03-13 Hitachi Industrial Equipment Systems Co Ltd Oil filled transformer
CN105547612A (en) * 2016-01-29 2016-05-04 湖北欢达电气股份有限公司 Transformer leakage testing device
CN113586829A (en) * 2021-08-03 2021-11-02 西安西电变压器有限责任公司 Electrical equipment and charge-discharge pressure monitoring device

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