JPS5872038A - Detecting element of oil leakage - Google Patents

Abstract

PURPOSE:To be capable of detecting oil leakage of any oils with a simple means, by providing an oil immersible light scattering material to an oil sending pipe line between a luminous part and photodetecting part. CONSTITUTION:An oil leakage detecting element is constituted by providing a luminous part 1 and a photodetecting part 2 face to face and an oil immersible light scattering material 3 consisting of a mat or fine pulverulent body of transparent synthetic fiber or inorganic glass fiber, pulverulent body etc. Scattering of the light is extremely decreased in case of invading the oil in this light scattering material because a refractive index of the oil is about 1.40-1.50 and transmitting quantity of the light is increased. Accordingly, the light from the part 1 is detected by the part 2 and an oil leakage signal is given.

Description

【発明の詳細な説明】 この発明は石油系！！’Ｉ科等のＡイブライン輸送やノ
ぐイブタイプＯＦケーブル等の長距離に布設される油入
ノぐイブラインの漏油を速やかに検知する検知素子に関
するものである。[Detailed Description of the Invention] This invention is petroleum-based! ! This invention relates to a detection element that promptly detects oil leakage from oil-filled nozzle lines that are installed over long distances such as A-line transportation systems such as 'I-class' or nogie-type OF cables.

前記の如き長距離に亘る油入ノソイプラインはそれ相当
の強度を保持するような設計と布設工法により漏油事故
の発生しないように対処しているものの、萬−１油事故
が発生した場合には速やかにこれ全検知し、漏油個所の
修復その他の対策をとる必要がある。The long-distance oil-filled pipelines mentioned above are designed to maintain a certain level of strength and are constructed using construction methods to prevent oil leaks, but in the event of an oil accident, It is necessary to promptly detect all of this and take measures such as repairing the oil leakage points.

そこで従来この種の漏油検知には、油を吸収することに
よって膨潤する材料を用い、この膨潤によシミ気的スイ
ッチを作動させて検知するものや、同軸ケーブルの絶縁
隔離体を疎水性で親油性の材料で作り、漏油による油を
この絶縁隔離体に吸蔵させることによって同軸ケーブル
の容酸変化を検出するものや、特にジェット燃料の如き
揮発性石油製品のノぞイブラインにあっては、ラインに
沿って多孔性・ぐイブを布設し、これにガス全送通させ
て、ガス中に含まれる石油製品を分析して検出する方法
等が提案されている。Conventionally, this type of oil leak detection uses a material that swells when it absorbs oil, and this swelling activates a stain gas switch to detect it, or the insulating separator of the coaxial cable is made of hydrophobic material. This is useful for devices that are made of oleophilic materials and that detect changes in the acid tolerance of coaxial cables by occluding oil from oil leaks in this insulating separator, and in particular for noise lines for volatile petroleum products such as jet fuel. , a method has been proposed in which porous gas pipes are installed along the line, gas is completely passed through the pipe, and petroleum products contained in the gas are analyzed and detected.

しかし、前記の油による膨潤で電気的スイッチを作動さ
せる方法は検知月利を土中に埋設した場合に、埋設上１
圧力の影＃を受は易く、漏油からスイッチの作動までか
なりの時間がか＼る欠点がある。父、同軸ケーブル全使
用する方法では、地下水水圧や水の表面張力の低下があ
る場合には、水でも作動する欠点がめる。更に多孔パイ
プ中にガスを送通する方法では揮発性の油の場合にはよ
いが、余り揮発性でない油の場合には通用できないとい
う欠点がある。However, the above-mentioned method of activating an electric switch by swelling with oil does not work when the sensor is buried in the soil.
The disadvantage is that it is easily affected by pressure and it takes a considerable amount of time from oil leakage to activation of the switch. He points out that the method of using all coaxial cables has the disadvantage that it can operate even in water if there is a drop in groundwater pressure or surface tension of water. Furthermore, the method of passing gas through a porous pipe is suitable for volatile oils, but has the disadvantage that it cannot be used for oils that are not very volatile.

不発明は上述の如き実ｆＩｔＫ　＊みてなされたもので
、発光部と受光部との間に油浸回目すな光散乱体全設け
、漏油がこの光散乱体に浸入した場合の光の透過着の増
大により漏油全検出するものである。The non-invention was made in consideration of the above-mentioned actual fItK*, which is that an oil immersion tube or a light scattering body is completely provided between the light emitting part and the light receiving part, and the transmission of light when oil leakage enters this light scattering body. This system detects all oil leakage by detecting an increase in oil buildup.

次に図面を参照しつ＼不発明を説明すると、発光部１と
受光部２と全対設し、その間に透明性合成繊維のマット
、微粉体、或は無機ガラス繊維、粉体等からなる油授可
能な光散体３會設けて不発明の漏油検知累子紫構成して
いる。Next, to explain the invention with reference to the drawings, the light emitting part 1 and the light receiving part 2 are arranged opposite to each other, and the space between them is made of transparent synthetic fiber mat, fine powder, inorganic glass fiber, powder, etc. Three light scatterers that can be filled with oil are provided to form an uninvented oil leakage detection device.

このような構造の副油検知素子をノぞイゾラインに沿っ
て適当な間隔で設ければ、ノミイブラインに油漏れが生
じた場合にその近くにある副油検知素子の油２　’ｌ＝
Ｊ能な光散乱体３中に浸入することとなる。従って油が
充満する＠には発光部１からの光は散乱してその透過酸
は極めて少々いが、油が充満することによって光の散乱
は減少しその透過性管増大するので受光面２でキャッチ
した光からこれを直ちに検出信号として漏油分検出する
ことができる。If the secondary oil detection elements with such a structure are installed at appropriate intervals along the nozzle line, when oil leaks in the nozzle line, the oil 2'l=
This will cause the light to enter the light scattering body 3 which is capable of absorbing light. Therefore, when the @ is filled with oil, the light from the light emitting part 1 is scattered and the transmitted acid is very small. The oil leakage can be detected immediately from the captured light as a detection signal.

不発明全構成する発光部及び受光部にはダイオード等を
直接利用してもよく、又、光ファイノ々−等で光を誘導
してもよいし、光散乱体には透明性の大なる素材例えば
アクリル繊維（屈折率率ｎ＝１．５０〜１．５２）、ナ
イロンｒｎ＝１−５６〜１．５８、ポリエステル繊維（
ｎ＝１．７２３、ポリプロピレンＲ維（ｎ　＝　１−５
１〜１−５３　）％を吸油し易いマツ）％の型で適用す
るものであり、光散乱体中に空気があるときは空気の屈
折率が約１であることから光は大きく散乱される。搗−
こ＼に水が入ってさたこと全想定すると、水の屈折率は
１．３３Ｐ４度であるので、光の散乱の程度は空気の場
合より軽減されるもののかなり光が散乱する仁とは明ら
かである。ところが油の屈折率は１．４０〜１．５０程
波であるので、この光散乱体中に油が浸入した場合には
光の散乱は極度に減少し、光の透過量ｆ！：増大する。A diode or the like may be used directly for the light emitting section and the light receiving section, or an optical fiber or the like may be used to guide the light, and a highly transparent material may be used for the light scattering body. For example, acrylic fiber (refractive index n = 1.50 to 1.52), nylon rn = 1-56 to 1.58, polyester fiber (
n = 1.723, polypropylene R fiber (n = 1-5
1 to 1-53)% is applied in the form of a pine tree that easily absorbs oil.When there is air in the light scattering material, the refractive index of air is approximately 1, so light is scattered greatly. . Pound
Assuming that water has entered this room, the refractive index of water is 1.33P4 degrees, so although the degree of light scattering is lower than that of air, it is clear that light is scattered considerably. It is. However, since the refractive index of oil is about 1.40 to 1.50, when oil penetrates into this light scattering material, the scattering of light is extremely reduced, and the amount of light transmitted f! : Increase.

従って発光部からの光は受光部で検知さ几漏油信号を与
えることになる。Therefore, the light from the light emitting part is detected by the light receiving part and gives an oil leakage signal.

以上の如く不発明によれば、光により漏油を感知するの
で、如何なる油の場合にも使用することができ、又、比
較的簡単な手段で速かな漏油検出をなし得る利虞がある
。As described above, according to the invention, oil leakage is detected by light, so it can be used for any kind of oil, and it has the advantage of being able to quickly detect oil leakage with relatively simple means. .

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

図は不発明の副油検知素子の構造を示すＭ断面図である
。 １発光部　　２受光部　　３光散乱体 特許出劇人　　藤倉’ｇｉ／ｍ株式会社代理人弁理士　
　　竹　内　　　　守The figure is an M sectional view showing the structure of an uninvented sub-oil detection element. 1 Light-emitting part 2 Light-receiving part 3 Light-scattering body patent Actor Fujikura'gi/m Co., Ltd. Patent attorney
Mamoru Takeuchi

Claims (1)

【特許請求の範囲】[Claims] 発光部と受光部との間に油浸可能な光散乱体を設けたこ
とを特徴とする漏油検知素子An oil leak detection element characterized in that a light scattering body that can be immersed in oil is provided between a light emitting part and a light receiving part.