JP2610714B2 - Method and apparatus for detecting inundation in electrical equipment case - Google Patents
Method and apparatus for detecting inundation in electrical equipment caseInfo
- Publication number
- JP2610714B2 JP2610714B2 JP3687591A JP3687591A JP2610714B2 JP 2610714 B2 JP2610714 B2 JP 2610714B2 JP 3687591 A JP3687591 A JP 3687591A JP 3687591 A JP3687591 A JP 3687591A JP 2610714 B2 JP2610714 B2 JP 2610714B2
- Authority
- JP
- Japan
- Prior art keywords
- electrical equipment
- probe
- equipment case
- case
- vibrator
- 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 - Lifetime
Links
Landscapes
- Examining Or Testing Airtightness (AREA)
- Geophysics And Detection Of Objects (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Sampling And Sample Adjustment (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、開閉器等、特に屋外に
設置される密閉型電気機器を収納する電気機器ケース内
部に溜まった浸水を検出する方法及び装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for detecting water immersed in a switchgear or the like, in particular, an electric equipment case for housing hermetically sealed electric equipment installed outdoors.
【０００２】[0002]
【従来の技術】開閉器等の各種屋外用密閉型電気機器
は、柱上や建物の壁等に取付けて使用されるが、例えば
柱上開閉器等のように、扉等の内部点検構造を持たない
電気機器のケース内部の雨等による浸水状態の点検は困
難で、これまでに効果的な浸水検出手段は開発されてい
ない。2. Description of the Related Art Various types of hermetically sealed outdoor electric equipment such as switches are used by being mounted on poles, walls of buildings, and the like. It is difficult to check the state of inundation due to rain or the like inside the case of electric equipment that does not have it, and no effective inundation detection means has been developed so far.
【０００３】従来においては、電気機器ケースの外観の
発錆状態を定期的に目視観察し、腐食の度合いの大きな
機器についてのみ補修塗装を行ったり、機器の取り替え
を行うものであった。Conventionally, the appearance of rust on the external appearance of an electrical equipment case is periodically visually observed, and repair painting is performed only on equipment having a high degree of corrosion, or equipment is replaced.
【０００４】[0004]
【発明が解決しようとする課題】しかし、このような目
視による観察では、電気機器ケースの外観上に全く錆が
認められない場合でも、例えば、ナット等の締結部材付
け根に発生する目視によって確認し難い錆による微細な
穴から浸水することがあり、そうした場合における浸水
の有無は検出することが困難であった。However, in such a visual observation, even if no rust is observed on the external appearance of the electrical equipment case, it is confirmed by visual inspection that occurs at the root of a fastening member such as a nut. Water may be immersed through minute holes due to difficult rust, and in such a case, it is difficult to detect the presence or absence of water immersion.
【０００５】電気機器ケース内部の浸水は、相間短絡事
故の原因にもなり、よって浸水の有無を検出して事故を
未然に防ぐことが、安全を確保する上で大切である。[0005] Water intrusion inside the electrical equipment case also causes a phase-to-phase short-circuit accident. Therefore, it is important to detect the presence or absence of water intrusion and prevent the accident from occurring in order to ensure safety.
【０００６】そこで、本発明は、上記した従来技術にお
ける問題点を解消すべく創案されたもので、電気機器ケ
ースを開くことなく、電気機器ケースの外部から浸水の
有無を正確に判断できるようにすることを技術的課題と
し、もって電気機器ケースの浸水の有無を簡単にかつ正
確にそして安全に検出することを目的とする。Accordingly, the present invention has been made to solve the above-mentioned problems in the prior art, and it is possible to accurately determine whether or not water has leaked from the outside of an electric equipment case without opening the electric equipment case. It is an object of the present invention to easily, accurately and safely detect the presence or absence of water in an electrical equipment case.
【０００７】[0007]
【課題を解決するための手段】上記技術的課題を解決す
る本発明の方法手段は、単パルス電気信号を超音波に変
換し、柱上開閉器等の屋外用密閉型電気機器の電気機器
ケースの底面に超音波を伝達すると共に、この超音波の
反射波を電気信号に変換する探触部で超音波の反射波を
捉えること、この探触部の超音波の反射波に従った電気
信号波を観測することにより、電気機器ケース内の水の
有無を判定すること、この水の有無の判定に際して、電
気機器ケースに低周波振動を与えるべく、探触部と併用
して低周波振動子を用いること、にある。The method of the present invention for solving the above-mentioned technical problem is to convert a single-pulse electric signal into an ultrasonic wave, and to convert the single-pulse electric signal into an electric equipment case for outdoor enclosed electric equipment such as a pole switch. The ultrasonic wave is transmitted to the bottom surface of the probe, and the reflected wave of the ultrasonic wave is captured by a probe that converts the reflected wave of the ultrasonic wave into an electric signal. Observing the waves to determine the presence or absence of water in the electrical equipment case. When determining the presence or absence of water, a low-frequency vibrator is used together with the probe to apply low-frequency vibration to the electrical equipment case. To use.
【０００８】また、上記技術的課題を解決する本発明の
構造手段は、単パルス電気信号を超音波に変換し、柱上
開閉器等の屋外用密閉型電気機器の電気機器ケースの底
面に超音波を伝達すると共に、この超音波の反射波を電
気信号に変換する振動子と、この振動子を、電気機器ケ
ースの底面に圧接させるべく、弾材を介して上面部分に
組付けたホルダーと、このホルダーの上面を電気機器ケ
ースの底面に吸着させる磁石と、ホルダーを回動自在に
支持する支持腕と、そしてこの支持腕に連結された操作
棒と、から構成した探触部を有すること、この探触部と
一緒に電気機器ケースの底面に圧接されて、この電気機
器ケースに低周波振動を与える低周波振動子を有するこ
と、探触部によって超音波の反射波から変換された電気
信号を時系列に波形表示する表示部を有すること、探触
部の振動子の電気機器ケースの底面に対向する面に、超
音波の伝達を遅延する遅延材と、グリースを含んだ多孔
質材との少なくとも一方を設けること、にある。Further, the structural means of the present invention for solving the above technical problem converts a single-pulse electric signal into an ultrasonic wave, and superposes the ultrasonic signal on the bottom of an electric equipment case of an outdoor sealed electric equipment such as a pole switch. A vibrator that transmits sound waves and converts the reflected waves of the ultrasonic waves into an electric signal, and a holder that is attached to an upper surface portion of the vibrator through an elastic material so as to press the vibrator against the bottom surface of the electric device case. Having a probe unit composed of a magnet for attracting the upper surface of the holder to the bottom surface of the electric device case, a support arm for rotatably supporting the holder, and an operation rod connected to the support arm. , With this probe
This electric machine is pressed against the bottom of the electrical equipment case together.
Have a low-frequency vibrator that gives low-frequency vibration to the
And a display unit for displaying a time-series waveform of an electric signal converted from the reflected wave of the ultrasonic wave by the probe unit, and the ultrasonic wave on the surface of the transducer of the probe unit facing the bottom surface of the electric device case. At least one of a delay material for delaying the transmission of heat and a porous material containing grease.
【０００９】探触部のホルダー部分を、上面を開口部と
した電気絶縁材料製の伸縮自在な絶縁部材で覆うのが有
効である。It is effective to cover the holder portion of the probe with a telescopic insulating member made of an electrically insulating material having an opening at the upper surface.
【００１０】[0010]
【作用】電気機器ケース底面に対する探触部のセット
は、現場で検査員が操作棒を持って、振動子の上面が位
置している探触部の上面を電気機器ケースの底面に押し
付けることにより達成され、同様に電気機器ケース底面
に対する低周波振動子のセットは、棒等により低周波振
動子の上面を電気機器ケースの底面に押し付けることに
より達成される。[Function] The probe is set on the bottom of the electrical equipment case by the inspector holding the operating rod at the site and pressing the upper surface of the probe where the top of the vibrator is located against the bottom of the electrical equipment case. Achieved , as well as electrical equipment case bottom
The low-frequency vibrator set for
Pressing the top of the rotor against the bottom of the electrical equipment case
More Ru been achieved.
【００１１】すなわち、探触部の上面を電気機器ケース
の底面に接近させると、上面に遅延材と多孔質材の少な
くとも一方を取付けた振動子の上面が電気機器ケース底
面に接触する。That is, when the upper surface of the probe is brought closer to the bottom surface of the electrical equipment case, the upper surface of the vibrator having at least one of the delay member and the porous material attached to the upper surface contacts the electrical equipment case bottom surface.
【００１２】この状態から、振動子に作用している弾材
の弾力に逆らって探触部を押し上げて、磁石の吸着力に
よりホルダーの上面を電気機器ケース底面に吸着させる
ことにより、探触部の電気機器ケース底面へのセットが
達成される。In this state, the probe is pushed up against the elasticity of the material acting on the vibrator, and the upper surface of the holder is attracted to the bottom of the electrical equipment case by the attraction force of the magnet. Is set on the bottom of the electrical equipment case.
【００１３】探触部が電気機器ケースの底面にセットさ
れた状態において、ホルダーは磁石の吸着力により電気
機器ケースへの一定した姿勢での組付き状態が保持さ
れ、また遅延材と多孔質材の少なくとも一方を取付けた
振動子の上面は、弾材の弾力により電気機器ケースの底
面に押圧された状態となるので、その電気機器ケース底
面に対する接触は隙間のない密接状態となる。When the probe is set on the bottom surface of the electric device case, the holder is held in a fixed posture to the electric device case by the attraction force of the magnet. The upper surface of the vibrator to which at least one of the above is attached is pressed against the bottom surface of the electric device case by the elasticity of the bullet, so that the contact with the electric device case bottom surface is in a close contact state with no gap.
【００１４】また、この探触部の電気機器ケース底面へ
のセット時に、探触部の上面が電気機器ケース底面と平
行になっていなくても、ホルダーが操作棒に対して支持
腕を介して回動変位自在に取付けられているので、探触
部は、操作棒からの押上げ力の作用と電気機器ケース底
面との接触とにより、自然とその上面を電気機器ケース
底面と平行にし、適正に電気機器ケース底面にセットさ
れる。When the probe is set on the bottom of the electrical equipment case, even if the upper surface of the probe is not parallel to the bottom of the electrical equipment case, the holder can be connected to the operating rod via the support arm. Since the probe is mounted so that it can be rotated and displaced, the probe will naturally have its top surface parallel to the bottom of the electrical device case by the action of the push-up force from the operating rod and the contact with the bottom of the electrical device case. Is set on the bottom of the electrical equipment case.
【００１５】探触部及び低周波振動子の電気機器ケース
底面へのセットが完了したならば、探触部の振動子に単
パルス電気信号を入力し、この振動子から電気機器ケー
ス底面に超音波を送出し、この振動子からの超音波の送
出と同時に、探触部と一緒に電気機器ケース底面にセッ
トされた低周波振動子を作動させて電気機器ケース底面
に低周波振動を与える。When the setting of the probe and the low-frequency vibrator on the bottom of the electric device case is completed, a single-pulse electric signal is input to the vibrator of the probe and the supersonic wave is applied from the vibrator to the bottom of the electric device case. A sound wave is transmitted, and at the same time as the transmission of the ultrasonic wave from the vibrator, the low-frequency vibrator set on the bottom of the electric device case is operated together with the probe to apply a low-frequency vibration to the bottom of the electric device case.
【００１６】電気機器ケース底面に送出された超音波
は、電気機器ケースの底板中を通過するが、この底板の
上面を通過する際にその一部が反射して振動子で受信さ
れ、電気信号に変換されて表示部で時系列に表示され
る。The ultrasonic waves transmitted to the bottom of the electrical equipment case pass through the bottom plate of the electrical equipment case. When passing through the top face of the bottom plate, a part of the ultrasonic waves is reflected and received by the vibrator, and the electrical signal is received. And displayed on the display unit in chronological order.
【００１７】電気機器ケースに浸水がない場合には、送
出された超音波の反射波は、電気機器ケース底板上面で
の反射波だけであるので、表示部には、この電気機器ケ
ース底板上面での反射波だけが表示されるが、電気機器
ケースに浸水がある場合は、電気機器ケース底板から浸
水中に伝播した超音波の一部が浸水の水面で反射して振
動子で受信され、表示部に表示されるので、表示部に
は、電気機器ケースの底板上面からの反射波と浸水水面
からの反射波の両方が時差をもって表示される。When there is no water in the electrical equipment case, the transmitted ultrasonic reflected wave is only the reflected wave on the upper surface of the electrical equipment case bottom plate. Is displayed, but if the electrical equipment case is submerged, part of the ultrasonic wave that has propagated into the water from the bottom plate of the electrical equipment case is reflected by the water surface of the flooded water and received by the vibrator. Therefore, both the reflected wave from the upper surface of the bottom plate of the electrical equipment case and the reflected wave from the flooded water surface are displayed on the display unit with a time difference.
【００１８】検査員は、表示部に二つの異なる反射波が
表示されたことを確認することによって、電気機器ケー
ス内に浸水があると判断する。The inspector confirms that two different reflected waves are displayed on the display unit, and determines that there is water in the electrical equipment case.
【００１９】この探触部からの超音波送出と同時に、低
周波振動により電気機器ケースの底板に低周波振動が与
えられているので、電気機器ケースに浸水の水面は振動
するが、探触部は電気機器ケースの底板に強固に吸着固
定しているので、電気機器ケースの底板と一体に振動す
る、すなわち電気機器ケースの底板に対して殆ど振動変
位することがないので、浸水水面からの反射波に低周波
振動による振れが現れるのに対して、電気機器ケースの
底板上面からの反射波には低周波振動による振れは殆ど
現れない。Since the low frequency vibration is applied to the bottom plate of the electrical equipment case by the low frequency vibration simultaneously with the transmission of the ultrasonic wave from the probe, the water surface of the water immersed in the electrical equipment case vibrates. Is firmly adsorbed and fixed to the bottom plate of the electrical device case, and vibrates integrally with the bottom plate of the electrical device case. The wave caused by the low frequency vibration appears on the wave, whereas the wave reflected by the upper surface of the bottom plate of the electrical equipment case hardly shows the vibration due to the low frequency vibration.
【００２０】このため、電気機器ケースの浸水が僅かで
あっても、表示された反射波に低周波振動による振れの
有無により、確実な検出が達成される。For this reason, even if the electrical equipment case is slightly flooded, reliable detection can be achieved by the presence or absence of vibration of the displayed reflected wave due to low-frequency vibration.
【００２１】また、電気機器ケースの取付け姿勢が傾い
ていて、電気機器ケースに対する探触部のセット箇所が
浸水から外れた位置となった場合でも、低周波振動によ
る浸水水面の波立ちにより送出された超音波が反射され
るので、浸水の検出は達成されることになる。Further, even when the mounting position of the electric equipment case is inclined and the set point of the probe with respect to the electric equipment case is out of the water, the water is sent out due to the waving of the water surface caused by the low frequency vibration. Since the ultrasound is reflected, submersion detection will be achieved.
【００２２】探触部の振動子の上面に取付けられる遅延
材は、振動子から送出された超音波の周波数を高めると
共に、伝達時間を遅延する作用を発揮するもので、この
周波数を高める作用と伝達時間遅延作用との相乗効果に
より、僅かな浸水でも検出可能としている。The delay member attached to the upper surface of the vibrator of the probe section increases the frequency of the ultrasonic wave transmitted from the vibrator and exhibits the effect of delaying the transmission time. Due to the synergistic effect with the transmission time delay effect, even slight flooding can be detected.
【００２３】この遅延材の長さは、超音波の通過時間
が、超音波の電気機器ケースの底板および浸水中を往復
する時間よりも長くなるように設定され、これにより表
示部において、電気機器ケースの底板上面あるいは浸水
水面からの反射波と、次に振動子から送出される超音波
とが重なって表示されないようにしている。The length of the delay member is set so that the transit time of the ultrasonic wave is longer than the transit time of the ultrasonic wave back and forth between the bottom plate of the electrical equipment case and the water immersion. The reflected wave from the upper surface of the bottom plate of the case or the flooded water surface and the ultrasonic wave transmitted next from the vibrator are prevented from being overlapped and displayed.
【００２４】探触部の振動子の上面に取付けられる多孔
質材は、振動子と電気機器ケース底面との間に空気ギャ
ップが形成されるのを確実に阻止し、両者間の超音波の
伝達性を良好なものとするので、浸水検出動作が正確で
安定したものとなる。The porous material attached to the upper surface of the vibrator in the probe section reliably prevents an air gap from being formed between the vibrator and the bottom of the electrical equipment case, and transmits ultrasonic waves between them. Since the performance is good, the inundation detection operation is accurate and stable.
【００２５】この多孔質材はグリースを含んでいるの
で、電気機器ケース底面に対する探触部のセットを連続
的に変更しても、その空気ギャップ形成阻止能力は低下
せず、これにより浸水検出操作を効率良く行うことがで
きる。Since this porous material contains grease, even if the set of the probe section with respect to the bottom of the electrical equipment case is continuously changed, its ability to prevent the formation of the air gap does not decrease. Can be performed efficiently.
【００２６】なお、振動子に遅延材と多孔質材との両方
を取付ける場合には、振動子に取りつけた遅延材の上面
に多孔質材を取付けることになる。When both the delay member and the porous member are attached to the vibrator, the porous member is attached to the upper surface of the delay member attached to the vibrator.
【００２７】探触部を絶縁部材で覆った場合には、操作
棒の先端に取付けられた探触部を、電気機器ケースの周
囲に在る高圧電線等から探触部を安全に絶縁することが
できるので、浸水検査操作時における検査員の感電事故
を未然に防止することがき、高い安全性を確保すること
ができる。When the probe is covered with an insulating member, the probe attached to the tip of the operating rod should be safely insulated from the high-voltage wires and the like around the electrical equipment case. Therefore, it is possible to prevent the electric shock accident of the inspector at the time of the immersion inspection operation, and to secure high safety.
【００２８】[0028]
【実施例】以下、本発明の実施例を、図面を参照しなが
ら説明する。図１において、Ａはそれ自体公知の超音波
探傷器であって、電気パルス発生部１と表示部３とから
成り、電気パルス発生部１は、基準時間信号発生器１
５、時間軸掃引部１６および同軸ケーブル２２を介して
探触部２に信号を送出する送信部１７を有し、送信パル
ス幅５０〜２５０nsの任意の単パルス電気信号を間歇的
に送出し、また表示部３は、受信増幅部１８、検波回路
フィルタ１９、ビデオ増幅器２０およびＣＲＴ画面２１
で構成されている。Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, A is an ultrasonic flaw detector known per se, which comprises an electric pulse generating unit 1 and a display unit 3, and the electric pulse generating unit 1 includes a reference time signal generator 1
5, having a transmitting unit 17 for transmitting a signal to the probe unit 2 via the time axis sweeping unit 16 and the coaxial cable 22, and intermittently transmitting an arbitrary single pulse electric signal having a transmission pulse width of 50 to 250 ns; The display unit 3 includes a reception amplification unit 18, a detection circuit filter 19, a video amplifier 20, and a CRT screen 21.
It is composed of
【００２９】探触部２は、その基本的構造は図２ないし
図４に示すように、長棒状の操作棒１０の先端に固定さ
れたコの字状の支持腕９の両腕片間に、止めねじ９Ａを
介してホルダー７を回動自在に取付け、有底筒形状をし
たホルダー７内に、ホルダー７の上端面開口部を閉塞す
る形態で取付けた押さえ板７Ａの中央に開設した孔か
ら、この押さえ板７Ａ上面が形成する探触部２の上端面
上に上端面を突出自在ではあるが、抜け出し不能に振動
子４を、またこの振動子４を上方に付勢する弾材６を、
そして磁石８と磁極片８Ａとの組合せ物を内装して構成
されている。As shown in FIGS. 2 to 4, the probe 2 has a basic structure between the two arms of a U-shaped support arm 9 fixed to the tip of a long rod-like operation rod 10. The holder 7 is rotatably mounted via a set screw 9A, and a hole formed at the center of a holding plate 7A mounted in the cylindrical bottomed holder 7 so as to close the opening at the upper end surface of the holder 7. Therefore, the upper end surface of the probe portion 2 formed by the upper surface of the pressing plate 7A can freely protrude from the upper end surface, but the vibrator 4 urges the vibrator 4 upward and the vibrator 4 to urge the vibrator 4 upward. To
Further, a combination of the magnet 8 and the pole piece 8A is provided therein.
【００３０】それゆえ、振動子４は、弾材６の弾力によ
り常時その上面を探触部２の上面上に突出させており、
探触部２の上面を形成する押さえ板７Ａは、磁石８の作
用により、探触部２の電気機器ケース５底面に対する吸
着面を形成している。Therefore, the vibrator 4 always projects its upper surface above the upper surface of the probe 2 by the elasticity of the bullet 6.
The holding plate 7 </ b> A that forms the upper surface of the probe 2 forms an adsorption surface of the probe 2 with respect to the bottom surface of the electric device case 5 by the action of the magnet 8.
【００３１】探触部２の振動子４には同軸ケーブル２２
が接続されており、この同軸ケーブル２２は、ホルダー
７の底壁に開設した通孔から、支持腕９の底壁に開設し
た通孔、そして操作棒１０内を通って超音波探傷器Ａに
導かれている。A coaxial cable 22 is connected to the vibrator 4 of the probe 2.
Is connected to the ultrasonic flaw detector A through the through hole formed in the bottom wall of the holder 7, the through hole formed in the bottom wall of the support arm 9, and the inside of the operation rod 10. You are being led.
【００３２】図８および図９は、低周波振動子１３を探
触部２と併用して浸水を検出する操作状態を示すもの
で、周波数を５０〜１００Hz程度に設定した低周波振動
子１３を、探触部２が吸着固定された電気機器ケース５
底面箇所付近に押圧した状態で固定し、低周波振動子１
３で浸水の水面を波立ちさせた状態で探触部２による浸
水検出を行い、この際、図９に示すように、電気機器ケ
ース５に角度Θの傾きがあり、かつ浸水程度が１mm程度
ときわめて小さくても、浸水水面の波立ちによる反射波
の振れにより、超音波の水面からの反射波を正確に識別
できる。FIGS. 8 and 9 show an operation state in which the low-frequency vibrator 13 is used together with the probe 2 to detect inundation, and the low-frequency vibrator 13 whose frequency is set to about 50 to 100 Hz is used. , Electric device case 5 to which probe 2 is fixed by suction
It is fixed in a state where it is pressed near the bottom part, and the low-frequency vibrator 1
In the state where the water surface is wavy in 3, the water detection is performed by the probe 2. At this time, as shown in FIG. 9, the electric device case 5 has an inclination of an angle Θ and the water infiltration degree is about 1 mm. Even if it is extremely small, it is possible to accurately identify the ultrasonic reflected wave from the water surface due to the swing of the reflected wave due to the rising of the flooded water surface.
【００３３】探触部２は、磁石８の磁力により電気機器
ケース５底面に吸着固定し、この状態で弾材６の弾力で
振動子４の上面を電気機器ケース５底面に押圧して、振
動子４からの超音波を電気機器ケース５の底板に送出す
るが、電気機器ケース５の底板が鉄製である場合、この
底板を通過する超音波の速度は常温で約６Km／秒である
が、水中では１．５Km／秒と遅いため、電気機器ケース
５の底板上面での反射波に対して、浸水水面での反射波
は遅れて振動子４に到達することになり、両反射波は時
差をもって表示部３に表示されることになる。The probe portion 2 is attracted and fixed to the bottom of the electric device case 5 by the magnetic force of the magnet 8, and in this state, the upper surface of the vibrator 4 is pressed against the bottom surface of the electric device case 5 by the elastic force of the bullet 6, and The ultrasonic wave from the child 4 is transmitted to the bottom plate of the electric device case 5. When the bottom plate of the electric device case 5 is made of iron, the speed of the ultrasonic wave passing through the bottom plate is about 6 km / sec at room temperature. Underwater, which is as slow as 1.5 km / sec, the reflected wave on the flooded water surface arrives at the vibrator 4 with a delay compared to the reflected wave on the upper surface of the bottom plate of the electrical equipment case 5, and the two reflected waves have a time difference. Will be displayed on the display unit 3.
【００３４】すなわち、電気機器ケース５に浸水がない
場合には、図１２に示すように、表示部３には、電気機
器ケース５の底板上面からの反射波２３だけが表示され
るので、“浸水なし”と判断でき、電気機器ケース５に
浸水がある場合には、図１３に示すように、表示部３に
は、反射波２３に遅れて、浸水水面からの反射波２４が
表示されるので、“浸水有り”と判断できる。That is, when there is no water in the electrical equipment case 5, as shown in FIG. 12, only the reflected wave 23 from the upper surface of the bottom plate of the electrical equipment case 5 is displayed on the display unit 3. If it is determined that there is no water intrusion, and the electric equipment case 5 is inundated, as shown in FIG. 13, the display unit 3 displays the reflected wave 24 from the flooded water surface after the reflected wave 23. Therefore, it can be determined that “there is flooding”.
【００３５】図６は、探触部２の振動子４上面に、ポリ
スチロール樹脂製の遅延材１２を取付けた構成を示すも
ので、振動子４は、２０ＭHz以上の周波数の超音波を発
信するものとし、これに対応して遅延材１２の長さは、
超音波の通過する時間が、電気機器ケース５の底板およ
び浸水中を往復する時間よりも長くなるように設定され
ており、振動子４の周波数を２０ＭHz以上と設定したの
は、遅延材１２の長さをできる限り短くするためであ
る。FIG. 6 shows a configuration in which a delay member 12 made of polystyrene resin is attached to the upper surface of the vibrator 4 of the probe section 2. The vibrator 4 emits ultrasonic waves having a frequency of 20 MHz or more. It is assumed that the length of the delay member 12 is correspondingly
The time for passing the ultrasonic wave is set to be longer than the time for reciprocating between the bottom plate of the electric equipment case 5 and the submersion, and the frequency of the vibrator 4 is set to 20 MHz or more because the delay material 12 This is to make the length as short as possible.
【００３６】遅延材１２を設けた場合は、図７に示すよ
うに、振動子４から時点ｔ1 において超音波を送出した
とすると、最初の反射波（遅延材１２上面での反射波）
は時点ｔ2 において現れ、次の反射波（電気機器ケース
５の底板上面での反射波）は時点ｔ4 において現れ、さ
らに次の反射波（浸水水面での反射波）は時点ｔ5 にお
いて現れ、そして振動子４から送出される次の超音波
は、超音波の遅延材１２を往復する時間が、超音波が電
気機器ケース５の底板および浸水中を往復する時間より
も長くなるように設定しているので、時点ｔ3 において
現れ、これにより時点ｔ4 および時点ｔ5 で表示される
波形と重なることがない。In the case where the delay member 12 is provided, as shown in FIG. 7, if an ultrasonic wave is transmitted from the vibrator 4 at time t 1 , the first reflected wave (reflected wave on the upper surface of the delay member 12)
Appears at time t 2 is (reflected waves at the bottom plate upper surface of the electrical equipment case 5) following the reflected wave appears at time t 4, the following additional reflected waves (reflected wave in flooded water) appeared at time t 5 The next ultrasonic wave transmitted from the vibrator 4 is set so that the time required for the ultrasonic wave to reciprocate through the delay member 12 is longer than the time required for the ultrasonic wave to reciprocate through the bottom plate of the electrical equipment case 5 and submerged water. since it has to appear at time t 3, do not overlap with Accordingly waveform displayed at t 4 and time t 5.
【００３７】なお、表示部３のＣＲＴ画面２１には、遅
延材１２先端面からの一回目の受信パルスの受信後に、
電気機器ケース５の底板上面からの受信パルスおよび浸
水水面からの受信パルスが受信されるのであるから、時
点ｔ2 〜ｔ3 までの範囲を表示するようにして、ＣＲＴ
画面２１の表示画面を有効に使用するのが良い。The CRT screen 21 of the display unit 3 displays the first reception pulse from the tip of the delay member 12 after receiving the first reception pulse.
Since it is the received pulses from received pulses and flooding water from the bottom plate upper surface of the electrical equipment case 5 is received, so as to display the range to the point t 2 ~t 3, CRT
It is preferable to use the display screen of the screen 21 effectively.
【００３８】図１０は、振動子４の上面、すなわち電気
機器ケース５底面に当接する面に、グリースを含んだ多
孔質材１４を設け、振動子４と電気機器ケース５底面と
の間の空気ギャップを無くし、超音波の伝達性を良くす
るようにした構成例を示すもので、半固形状のシリコン
グリース等のグリースを含んだ脱脂綿、ガーゼ、発泡ウ
レタン等で多孔質材１４を構成している。FIG. 10 shows that the porous material 14 containing grease is provided on the upper surface of the vibrator 4, that is, the surface that comes into contact with the bottom surface of the electric device case 5. This is an example of a configuration in which a gap is eliminated and transmission of ultrasonic waves is improved, and the porous material 14 is formed of absorbent cotton, gauze, urethane foam, or the like containing grease such as semi-solid silicon grease. I have.
【００３９】図５は、電気機器ケース５の周囲に高圧電
線等の充電部が存在する場合に、電気機器ケース５の浸
水検査操作を安全に達成すべく、操作棒１０の先端に、
探触部２を包む形態で絶縁部材１１を組付けた構成を示
すもので、絶縁部材１１は、その上端開口縁が電気機器
ケース５の底面に押し付けられることにより、この押圧
力により蛇腹状の筒壁が弾性収縮変形し、その開口縁部
分で内部の振動子５の上面を電気機器ケース５底面に当
接させる。FIG. 5 shows a state in which a charged portion such as a high-voltage electric wire is present around the electric device case 5.
This shows a configuration in which an insulating member 11 is assembled in a form that wraps the probe 2, and the insulating member 11 has a bellows shape formed by pressing the upper end opening edge against the bottom surface of the electric device case 5. The cylindrical wall is elastically contracted and deformed, and the upper surface of the internal vibrator 5 is brought into contact with the bottom surface of the electric device case 5 at the opening edge portion.
【００４０】図１１は、本発明の操作例を示すもので、
図１５のフローに示す操作手順に従って、バケット２５
に乗った検査員Ｍ１は、操作棒１０を持って電柱上の電
気機器ケース５の底面に探触部２、すなわち振動子４上
面を当接させると共に、棒等により低周波振動子１３の
上面を電気機器ケース５の底面に当接させる。FIG. 11 shows an operation example of the present invention.
According to the operation procedure shown in the flow of FIG.
The inspector M1 riding on the probe holds the probe 2, that is, the upper surface of the vibrator 4, with the operating rod 10 on the bottom of the electric device case 5 on the power pole, and the low-frequency vibrator 13 is
The upper surface is brought into contact with the bottom surface of the electric device case 5 .
【００４１】バケット２５には超音波探傷器Ａも持ち込
まれており、他の検査員Ｍ２の操作により超音波探傷器
Ａを作動させて、探触部２から超音波を発信させ、ＣＲ
Ｔ画面２１を見ながら浸水の有無を検査する。The ultrasonic flaw detector A is also brought into the bucket 25. The ultrasonic flaw detector A is operated by the operation of another inspector M2 to transmit ultrasonic waves from the probe 2, and the CR
While watching the T screen 21, the presence or absence of flooding is inspected.
【００４２】ＣＲＴ画面２１に、図１３に示すように、
浸水からの反射波２４が現れた場合には、“浸水有り”
と判断し、図１２に示すように、反射波２４が現れない
場合には、探触部２と一緒に電気機器ケース５の底面に
当接させた低周波振動子１３を作動させて、新たに反射
波２４が表示されるか、または表示された反射波に振れ
が生じているかを観察する。On the CRT screen 21, as shown in FIG.
If the reflected wave 24 from the inundation appears, "There is inundation"
When the reflected wave 24 does not appear as shown in FIG. 12, the low-frequency vibrator 13 abutting on the bottom surface of the electric device case 5 is operated together with the probe 2 to newly It is observed whether or not the reflected wave 24 is displayed on the display, or whether the displayed reflected wave is deflected.
【００４３】反射波２４が現れた場合には、“浸水有
り”と判断するが、反射波に振れが生じている場合、反
射波２３が振れている時には、検査装置が不安定状態に
あると判断して検査のやり直しを行い、表示された反射
波の前半に振れがなく、後半に振れがある時には、“浸
水有り”と判断し、反射波に全く振れがない場合には、
“浸水無し”と判断して作業を完了する。When the reflected wave 24 appears, it is determined that "inundation is present". However, when the reflected wave is deflected, when the reflected wave 23 is deflected, it is determined that the inspection apparatus is in an unstable state. Judgment and re-inspection are performed. If there is no shake in the first half of the displayed reflected wave and there is a shake in the second half, it is judged that there is water intrusion, and if there is no shake in the reflected wave,
The work is completed by judging that there is no flooding.
【００４４】[0044]
【発明の効果】本発明は、上記した構成となっているの
で、以下に示す効果を奏する。超音波による検出動作に
加えて、電気機器ケースの底板に対する低周波の加振に
より、超音波検出装置そのものの動作の良否をチェック
すると共に、電気機器ケース内の僅かな浸水を検出を可
能とし、もって電気機器ケースの浸水検出を、きわめて
高い精度および信頼性で達成できる。Since the present invention has the above-described structure, the following effects can be obtained. In addition to the detection operation using ultrasonic waves, low-frequency vibrations applied to the bottom plate of the electrical equipment case allow the operation of the ultrasonic detection device itself to be checked for goodness and enable the detection of slight water in the electrical equipment case, Thus, the detection of water in the electrical equipment case can be achieved with extremely high accuracy and reliability.
【００４５】弾材と磁石との組合せにより、電気機器ケ
ースに対する探触部の強固で良好でそして安定した組付
きを、確実にかつ簡単に達成し、また遅延材および多孔
質材の組合せにより、電気機器ケース内の僅かな浸水で
も精度良く確実に検出することができ、もって電気機器
ケースの浸水の有無の検査を、この電気機器ケースを開
放することなく、簡単にかつきわめて高い精度で達成す
ることができる。By the combination of the elastic material and the magnet, a strong, good and stable assembling of the probe with respect to the electric equipment case is reliably and easily achieved, and by the combination of the delay material and the porous material, Even the slightest inundation in the electrical equipment case can be detected accurately and reliably, so that the inspection of the electrical equipment case for water intrusion can be achieved easily and with extremely high accuracy without opening the electrical equipment case. be able to.
【００４６】探触部に絶縁部材を組付けた場合には、高
圧電線等の充電部が周囲に存在する環境下であっても、
簡単な操作で電気機器ケースの浸水の検出を安全に達成
することができる。In the case where the insulating member is attached to the probe, even in the environment where the charged part such as the high voltage electric wire exists in the surroundings,
The detection of water in the electrical equipment case can be safely achieved with a simple operation.
【図１】本発明の探触部に関連する主要部分の一実施例
を示す、構成図。FIG. 1 is a configuration diagram showing one embodiment of a main portion related to a probe of the present invention.
【図２】本発明の探触部のホルダー部分の一実施例を示
す、側面図。FIG. 2 is a side view showing one embodiment of a holder portion of the probe according to the present invention.
【図３】図２に示した探触部のホルダー部分の平面図。FIG. 3 is a plan view of a holder portion of the probe shown in FIG. 2;
【図４】図２に示した探触部のホルダー部分の縦断正面
図。FIG. 4 is a vertical sectional front view of a holder portion of the probe shown in FIG. 2;
【図５】本発明の探触部のホルダー部分の他の実施例を
示す、一部破断した側面図。FIG. 5 is a partially broken side view showing another embodiment of the holder portion of the probe of the present invention.
【図６】探触部に遅延材を取付けた実施例を示す、一部
縦断した簡略部。FIG. 6 is a partially cut-away simplified portion showing an embodiment in which a delay member is attached to a probe.
【図７】図６に示した遅延材を取付けた場合の、表示部
における反射波の波形の一例を示す説明図。FIG. 7 is an explanatory diagram showing an example of a waveform of a reflected wave on the display unit when the delay member shown in FIG. 6 is attached.
【図８】本発明の実施例を示す、一部縦断した簡略図。FIG. 8 is a simplified view showing an embodiment of the present invention, which is partially longitudinally cut.
【図９】図８に示した実施例における浸水検知動作状態
を示す、一部縦断した説明図。FIG. 9 is a partially longitudinal explanatory view showing a state of water intrusion detection in the embodiment shown in FIG. 8;
【図１０】探触部の振動子に多孔質材を取付けた、本発
明の一実施例を示す正面図。FIG. 10 is a front view showing one embodiment of the present invention in which a porous material is attached to a transducer of a probe unit.
【図１１】本発明装置を使用して、柱上電気機器の浸水
検査作業を行っている状態例を示す説明図。FIG. 11 is an explanatory diagram showing an example of a state in which a flood inspection operation of electrical equipment on a pole is performed using the apparatus of the present invention.
【図１２】本発明の表示部における低周波振動子を作動
させない状態での表示波形の一例を示す、浸水のない状
態のオシロ波形図。FIG. 12 is an oscilloscope waveform diagram showing an example of a display waveform in a state where the low-frequency vibrator is not operated in the display unit of the present invention, where there is no water intrusion.
【図１３】本発明の表示部における低周波振動子を作動
させない状態での表示波形の他の例を示す、約２０mmの
浸水がある状態のオシロ波形図。FIG. 13 is an oscilloscope waveform diagram showing another example of a display waveform in a state where the low-frequency vibrator is not operated in the display unit of the present invention, where there is water infiltration of about 20 mm.
【図１４】本発明の表示部における低周波振動子を２０
MHz で作動させ状態での表示波形の一例を示す、２mmの
浸水がある状態のオシロ波形図。FIG. 14 shows a case where the low-frequency vibrator in the display unit of the present invention is 20;
FIG. 3 is an oscilloscope waveform diagram showing an example of a display waveform in a state where the device is operated at MHz and in which there is a 2 mm inundation.
【図１５】本発明の操作手順の一例を示す、作業流れ
図。FIG. 15 is a work flow chart showing an example of an operation procedure according to the present invention.
Ａ ； 超音波探傷器 １ ； 電気パルス発生部 ２ ； 探触部 ３ ； 表示部 ４ ； 振動子 ５ ； 電気機器ケース ６ ； 弾材 ７ ； ホルダー ７Ａ； 押さえ板 ８ ； 磁石 ８Ａ； 磁極片 ９ ； 支持腕 ９Ａ； 止めねじ １０； 操作棒 １１； 絶縁部材 １２； 遅延材 １３； 低周波振動子 １４； 多孔質材 １５； 基準時間発生器 １６； 時間軸掃引部 １７； 送信部 １８； 受信増幅部 １９； 検波回路フィルタ ２０； ビデオ増幅器 ２１； ＣＲＴ画面 ２２； 同軸ケーブル ２３； 電気機器ケースの反射波 ２４； 水の反射波 ２５； バケット A; ultrasonic flaw detector 1; electric pulse generator 2; probe 3; display 4; vibrator 5; electric device case 6; bullet 7; holder 7A; holding plate 8; magnet 8A; Support arm 9A; Set screw 10; Operation rod 11; Insulating member 12; Delay member 13; Low-frequency oscillator 14; Porous material 15; Reference time generator 16; Time axis sweeping unit 17; Transmitting unit 18; 19; detection circuit filter 20; video amplifier 21; CRT screen 22; coaxial cable 23; reflected wave of electric device case 24; reflected wave of water 25; bucket
───────────────────────────────────────────────────── フロントページの続き (72)発明者 麻生 浩二 東京都千代田区有楽町１丁目７番１号 東光電気株式会社 内 (72)発明者 和気 正二 東京都調布市西つつじケ丘二丁目４番１ 号 東京電力株式会社 技術研究所 内 (72)発明者 望月 一寿 東京都調布市西つつじケ丘二丁目４番１ 号 東京電力株式会社 技術研究所 内 (56)参考文献 実開 平１−180680（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Aso, Inventor Koji Aso 1-7-1, Yurakucho, Chiyoda-ku, Tokyo Toko Electric Co., Ltd. (72) Inventor Kazutoshi Mochizuki 2-4-1, Nishi-Atsujigaoka, Chofu-shi, Tokyo Tokyo Electric Power Company, R & D Laboratory (56) References Hikaru 1-180680 (JP, U)
Claims (3)
柱上開閉器等の屋外用密閉型電気機器の電気機器ケース
(5) の底面に前記超音波を伝達すると共に、該超音波の
反射波を電気信号に変換する探触部(2) で前記超音波の
反射波を捉え、該探触部(2) の前記超音波の反射波に従
った電気信号波を観測することにより、前記電気機器ケ
ース(5) 内の水の有無を判定する際に、前記電気機器ケ
ース(5) に低周波振動を与えるべく、前記探触部(2) と
併用して低周波振動子(13)を用いる電気機器ケース内の
浸水検出方法。1. A method for converting a single-pulse electric signal into an ultrasonic wave,
Electrical equipment case for outdoor sealed electrical equipment such as pole-mounted switches
(5) While transmitting the ultrasonic waves to the bottom surface,
The probe (2) that converts the reflected wave into an electric signal
The reflected wave is captured, and the reflected wave of the ultrasonic wave from the probe (2) is taken.
By observing the electrical signal wave
When determining the presence or absence of water in the case (5),
In order to apply low-frequency vibration to the source (5), the probe (2)
A method for detecting inundation in an electrical equipment case using a low-frequency vibrator (13) in combination .
柱上開閉器等の屋外用密閉型電気機器の電気機器ケース
(5) の底面に前記超音波を伝達すると共に、該超音波の
反射波を電気信号に変換する振動子(4) と、該振動子
(4) を前記電気機器ケース(5) の底面に圧接させるべ
く、弾材(6) を介して上面部分に組付けたホルダー(7)
と、該ホルダー(7) の上面を前記電気機器ケース(5) の
底面に吸着させる磁石(8) と、前記ホルダー(7) を回動
自在に支持する支持腕(9) と、そして該支持腕(9) に連
結された操作棒(10)と、から構成した探触部(2) と、該
探触部(2) と一緒に前記電気機器ケース(5) の底面に圧
接されて、該電気機器ケース(5)に低周波振動を与える
低周波振動子(13)と、前記探触部(2) によって前記反射
波から変換された電気信号を時系列に波形表示する表示
部(3) とから成り、前記振動子(4) の前記電気機器ケー
ス(5) の底面に対向する面に、超音波の伝達を遅延する
遅延材(12)と、グリースを含んだ多孔質材(14)との少な
くとも一方を設けた電気機器ケース内の浸水検出装置。2. Converting a single-pulse electric signal into an ultrasonic wave,
Electrical equipment case for outdoor sealed electrical equipment such as pole-mounted switches
A vibrator (4) for transmitting the ultrasonic wave to the bottom surface of (5) and converting a reflected wave of the ultrasonic wave into an electric signal; and
(4) Holder (7) assembled to the upper part via an elastic material (6) so as to press it against the bottom of the electrical equipment case (5)
A magnet (8) for attracting the upper surface of the holder (7) to the bottom surface of the electrical equipment case (5); a support arm (9) for rotatably supporting the holder (7); an arm (9) linked operating rod (10), probe unit which is composed of a (2), the
Press the bottom of the electrical equipment case (5) together with the probe (2).
Touching to give low frequency vibration to the electrical equipment case (5)
A low-frequency vibrator (13), and a display unit (3) for displaying a time-series waveform of an electric signal converted from the reflected wave by the probe unit (2), and the vibrator (4) An electrical device case in which at least one of a delay material (12) for delaying transmission of ultrasonic waves and a porous material (14) containing grease is provided on a surface opposite to a bottom surface of the electrical device case (5). Inundation detector.
面を開口部とした電気絶縁材料製の伸縮自在な絶縁部材
(11)で覆った請求項２記載の電気機器ケース内の浸水検
出装置。3. The holder (7) of the probe section (2) is
Telescopic insulating member made of an electrical insulating material with an opening at the surface
3. The apparatus for detecting inundation in an electric equipment case according to claim 2, wherein the apparatus is covered with (11) .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3687591A JP2610714B2 (en) | 1991-02-06 | 1991-02-06 | Method and apparatus for detecting inundation in electrical equipment case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3687591A JP2610714B2 (en) | 1991-02-06 | 1991-02-06 | Method and apparatus for detecting inundation in electrical equipment case |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04348274A JPH04348274A (en) | 1992-12-03 |
| JP2610714B2 true JP2610714B2 (en) | 1997-05-14 |
Family
ID=12481958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3687591A Expired - Lifetime JP2610714B2 (en) | 1991-02-06 | 1991-02-06 | Method and apparatus for detecting inundation in electrical equipment case |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2610714B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5213771B2 (en) * | 2009-03-18 | 2013-06-19 | 中国電力株式会社 | Switch inundation amount estimation method and switch inundation amount estimation device |
| JP5132652B2 (en) * | 2009-10-20 | 2013-01-30 | 中国電力株式会社 | Mounting method and mounting jig for inundation determination device |
| JP2011089807A (en) * | 2009-10-20 | 2011-05-06 | Chugoku Electric Power Co Inc:The | Method of attaching water intrusion determination device |
| CN112903422B (en) * | 2021-01-25 | 2022-08-30 | 南昌航空大学 | Compression experimental device and method under ultrasonic vibration and electric pulse coupling |
| US20240151367A1 (en) * | 2021-03-19 | 2024-05-09 | Nec Corporation | Flooding detection device, flooding detection system, and flooding detection method |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5585006U (en) * | 1978-12-04 | 1980-06-12 | ||
| JPS6046421A (en) * | 1983-08-24 | 1985-03-13 | Nagase Sangyo Kk | Detection of liquid |
| JPS6186650A (en) * | 1984-10-04 | 1986-05-02 | Toshiba Corp | Ultrasonic-wave flaw detector and ultrasonic-wave flaw detecting method |
| JPH035844Y2 (en) * | 1984-12-11 | 1991-02-14 | ||
| JPS62197062U (en) * | 1986-06-04 | 1987-12-15 | ||
| JPS6347657A (en) * | 1986-08-16 | 1988-02-29 | Canon Inc | Ultrasonic flaw detection apparatus |
| JPH0181565U (en) * | 1987-11-24 | 1989-05-31 | ||
| JPH01180680U (en) * | 1988-05-30 | 1989-12-26 | ||
| JPH02216007A (en) * | 1989-02-17 | 1990-08-28 | Toshiba Corp | Ultrasonic transducer |
| JPH0312509A (en) * | 1989-06-09 | 1991-01-21 | Shimizu Corp | Method and device for measuring internal gap in concrete using ultrasonic wave |
-
1991
- 1991-02-06 JP JP3687591A patent/JP2610714B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04348274A (en) | 1992-12-03 |
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