JP4174682B2 - Underground tank oil leak detection device - Google Patents

Underground tank oil leak detection device Download PDF

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JP4174682B2
JP4174682B2 JP2005038560A JP2005038560A JP4174682B2 JP 4174682 B2 JP4174682 B2 JP 4174682B2 JP 2005038560 A JP2005038560 A JP 2005038560A JP 2005038560 A JP2005038560 A JP 2005038560A JP 4174682 B2 JP4174682 B2 JP 4174682B2
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terminal
detection
oil
detection port
underground tank
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JP2006226739A (en
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晴久 山田
尚彦 鈴木
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Tatsuno Corp
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Description

本発明は、例えば、自動車にガソリン等の燃料油を給油するため、給油所の敷地に設置する地下タンクの漏油を検知する地下タンクの漏油検知装置に関するものである。   The present invention relates to an oil leak detection device for an underground tank that detects an oil leak in an underground tank installed on a site of a gas station, for example, in order to supply fuel oil such as gasoline to an automobile.

一般に、ガソリン給油所においては、円筒状の密閉容器として形成された複数の地下タンクが埋設され、これらの地下タンク内にガソリン、軽油、灯油等の燃料油を個別に貯留するようにしている。ところで、この地下タンクに、ひび割れ等が生じたときには、その内部に貯留された引火性の高い可燃物である燃料油が周囲の地中に漏れ出し、危険が生じるおそれがあった。そのため、地下タンクの周囲の地中には、漏油発生を検知する手段として漏油検知装置が設置されている。例えば、本出願人は、地下タンク近傍に埋設したガス検知管の上端部側に、バランスウェイトを設けた回転表示器を収め、テンションウェイトを取り付けた油で溶ける材質の紐をガス検知管内に張設し、この紐の切断によりバランスウェイトの重量に抗して回転表示器を反転するようワイヤをテンションウェイトに連携させ、回転表示器の反転によりオンするリードスイッチの電気信号を報知装置に出力する地下タンクの漏油検知装置に関する技術を提案している（例えば、特許文献１参照。）。
特許第３０７４３５１号公報（第２〜３ページ、図１〜３）。 Generally, in a gasoline filling station, a plurality of underground tanks formed as cylindrical sealed containers are embedded, and fuel oils such as gasoline, light oil, and kerosene are individually stored in these underground tanks. By the way, when a crack or the like occurs in the underground tank, there is a risk that fuel oil, which is a highly flammable combustible material stored in the underground tank, leaks into the surrounding ground, causing danger. Therefore, an oil leakage detection device is installed in the ground around the underground tank as means for detecting the occurrence of oil leakage. For example, the applicant stores a rotating indicator with a balance weight on the upper end side of a gas detector tube buried in the vicinity of an underground tank, and stretches a string made of a material that can be melted with oil attached with a tension weight in the gas detector tube. The wire is linked to the tension weight so as to invert the rotation indicator against the weight of the balance weight by cutting the string, and an electric signal of the reed switch that is turned on by the inversion of the rotation indicator is output to the notification device. The technique regarding the oil leak detection apparatus of an underground tank is proposed (for example, refer patent document 1).
Japanese Patent No. 3074351 (pages 2 and 3, FIGS. 1 to 3).

従来の地下タンクの漏油検知装置は、機械的な簡単な構造で漏油検知ができるが、既存の地下タンクに新たに設置する場合には、ガス検知管の上端部側の検知口も老朽化が進んでいるため大幅に改造するか、あるいは従来の地中深くまで埋設されているガス検知管を取り外して新たに埋め込む等の大掛かりな作業を必要とするおそれがあった。   Conventional underground tank oil leak detection devices can detect oil leaks with a simple mechanical structure, but when newly installed in an existing underground tank, the detection port on the upper end of the gas detector tube is also obsolete. There is a risk of requiring extensive work such as a major modification, such as a major modification such as removing a gas detector tube that has been buried deep underground, and refilling it.

本発明は上記事情に鑑みなされたもので、既存の漏油検知装置に使用されているガス検知管を利用して簡単な作業で短時間に設置することが可能になり、漏油を安全確実に把握でき、かつ保守作業も容易になる地下タンクの漏油検知装置を提供することを目的とする。   The present invention has been made in view of the above circumstances, and can be installed in a short time with a simple operation using a gas detection tube used in an existing oil leakage detection device, so that the oil leakage can be safely and reliably performed. It is an object of the present invention to provide an underground tank oil leakage detection device that can be easily grasped and can be easily maintained.

上記目的を達成するために請求項１に記載の発明にあっては、地下タンク近傍の地中に埋設されたガス検知管と、一端部側が前記ガス検知管内の底に位置し他端部側が該ガス検知管の地表近傍の検知口に位置するよう垂直に懸垂張設して配置された油成分に接触したときに膨張して電気抵抗を変化する膨潤抵抗変化型の漏洩センサと、前記検知口の近傍に配置され前記漏洩センサの他端部側が導入されて漏油検知用の制御装置に信号線で接続する端子室を有する端子ケースと、前記検知口近傍の漏洩センサ上部を覆うとともに前記端子室の上面を密閉する保護カバーとを備え、前記端子ケースは、前記検知口近傍の側面側の地表に形成された溝内に配置され、上面が開口され内部に端子台を設けた端子室と、この端子室の両側端面から前記検知口側へ帯状に延出された導入部と、前記保護カバーをビスにより固定する取付け部とを有し、前記漏洩センサは、その上端部側が前記検知口から前記端子ケース側へ向けて曲げられた湾曲部が形成され、この湾曲部側の前記漏洩センサの信号線が前記導入部から前記端子室内へ案内され、前記端子台上で接続されて前記導入部と反対側の溝に沿って配置された電線管に案内され、かつ前記保護カバーは、その上面が車両の車輪や人が踏み付けても前記漏洩センサと前記端子ケースを保護できる強度を有するとともに前記車輪や人が踏み付けても安全な曲面状に形成されていることを特徴とするものである。既存の漏油検知装置に使用されているガス検知管を利用して簡単な作業で短時間に設置することが可能になり、漏洩センサにより漏油を安全確実に把握でき、かつ端子ケース上部の保護カバーを取り外すことで保守作業も容易になる。また、端子ケースを地表の溝に形成することで、車両や人の踏み付けに対して機器の保護と車両や人への危険防止を図ることができ、検知口から湾曲部を形成して端子ケースの端子室に導入されている漏洩センサの上部を覆うことができ、端子ケースの上面をシール材を介して気密に密閉することで安全防爆構造を実現できる。 In order to achieve the above object, in the first aspect of the present invention, the gas detector pipe buried in the ground near the underground tank, the one end side is located at the bottom in the gas detector pipe , and the other end side is A swelling resistance change type leak sensor that expands and changes its electrical resistance when it comes into contact with an oil component that is vertically suspended so as to be positioned at a detection port near the ground surface of the gas detection pipe, and the detection A terminal case having a terminal chamber disposed near the mouth and having a terminal chamber connected to a control device for detecting oil leakage by a signal line through which the other end of the leak sensor is introduced; A terminal cover provided with a protective cover for sealing the upper surface of the terminal chamber , wherein the terminal case is disposed in a groove formed in the ground surface on the side surface near the detection port, and the upper surface is opened and a terminal block is provided therein. And the inspection from both end faces of the terminal chamber. The leakage sensor has an introduction portion extending in a band shape toward the mouth side and an attachment portion for fixing the protective cover with screws, and the upper end portion side of the leak sensor is bent from the detection port toward the terminal case side. A curved portion is formed, and the signal line of the leakage sensor on the curved portion side is guided from the introducing portion to the terminal chamber, connected on the terminal block, and disposed along the groove on the opposite side to the introducing portion. The protection cover is strong enough to protect the leakage sensor and the terminal case even if the upper surface of the protective cover is stepped on by a vehicle wheel or a person, and is safe even if the wheel or person steps on the protective cover. It is characterized by being formed into a curved surface . The gas detector tube used in the existing oil leak detector can be installed in a short time with a simple operation, and the leak sensor can grasp the oil leak safely and securely, and the upper part of the terminal case Maintenance work is also facilitated by removing the protective cover. In addition, by forming the terminal case in the groove on the ground surface, it is possible to protect the equipment against trampling of the vehicle and people and prevent danger to the vehicle and people, and form a curved portion from the detection port to form the terminal case The upper part of the leak sensor introduced into the terminal chamber can be covered, and a safety explosion-proof structure can be realized by hermetically sealing the upper surface of the terminal case with a sealing material.

本発明では、地下タンク近傍の地中に埋設されたガス検知管と、一端部側がガス検知管内に位置し他端部側がガス検知管の地表近傍の検知口に位置するよう配置された膨潤抵抗変化型の漏洩センサと、検知口の近傍に配置され漏洩センサの他端部側が導入されて漏油検知用の制御装置に信号線で接続する端子室を有する端子ケースと、検知口近傍の漏洩センサ上部を覆うとともに端子室の上面を密閉する保護カバーとを備えたことで、既存の漏油検知装置に使用されているガス検知管を利用して簡単な作業で短時間に設置することが可能になり、漏洩センサにより漏油を安全確実に把握でき、かつ端子ケース上部の保護カバーを取り外すことで保守作業も容易になる。   In the present invention, the gas detection pipe buried in the ground near the underground tank, and the swelling resistance arranged so that one end side is located in the gas detection pipe and the other end side is located in the detection opening near the ground surface of the gas detection pipe A change-type leak sensor, a terminal case that is arranged near the detection port and has a terminal chamber that is connected to a control device for detecting oil leaks by introducing the other end of the leak sensor, and a leak near the detection port By providing a protective cover that covers the upper part of the sensor and seals the upper surface of the terminal chamber, it can be installed in a short time with a simple operation using the gas detection tube used in the existing oil leakage detection device. This makes it possible to safely and reliably grasp the oil leakage by the leakage sensor, and the maintenance work is facilitated by removing the protective cover at the top of the terminal case.

以下、本発明を図示の一実施形態により具体的に説明する。図１〜図３は本発明実施形態の地下タンクの漏油検知装置を説明する図であり、図１は漏油検知装置の縦断面図、図2は漏油検知装置の平面図、図３は給油所の地下タンク装置を説明する全体図である。   Hereinafter, the present invention will be specifically described with reference to an illustrated embodiment. 1-3 is a figure explaining the oil leak detection apparatus of the underground tank of embodiment of this invention, FIG. 1 is a longitudinal cross-sectional view of an oil leak detection apparatus, FIG. 2 is a top view of an oil leak detection apparatus, FIG. FIG. 2 is an overall view illustrating an underground tank device of a gas station.

図３は、給油所に設けられる地下タンク装置１の全体構成を示しており、敷地２の地下には、ガソリン、軽油、灯油等のいずれかの油液を貯留するための地下タンク本体３０が埋設され、敷地２上には給油装置３１が立設されている。地下タンク本体３０の上部側は、敷地２上面をコンクリートで形成し、そのコンクリート表面にマンホールを形成したマンホールピット３２，３２が設けられている。この地下タンク本体３０には、下端部が内部に連通される注油管３３が設けられている。この注油管３３の上端部側は、地下タンク本体３０上部のマンホールピット３２内に導入され、地上でタンクローリから荷卸しされる油の注油ホースが接続される注油口３４を有する配管に連通されている。また、地下タンク本体３０には、下端部側が内部に連通される給油管３５が設けられ、この給油管３５の上端部側はマンホールピット３２内において横引管３６に連通されている。この横引管３６の他端部側は、給油装置３１の下部に形成された給油ピット３７内に導入され、上部に導かれて給油装置３１のポンプ等の給油機構に連通されている。地下タンク本体３０上部のマンホールピット３２内には、地下タンクの漏洩検知装置４２が配置されている。また、他のマンホールピット３２内には、上部から下部の地下タンク本体３０の底近傍まで細長いステム４３が延出され、その上端部に地下タンク本体３０の油面を検知する磁歪式等による油面計４４が設けられている。さらに、それぞれのマンホールピット３２，３２内及び給油ピット３７内には、漏油検知装置４５が配置されている。注油口３４の近傍には、下端部側が地下タンク本体３０内の上部空間に連通され、上端部側が敷地２の上部空間に開口された通気管３８が設けられている。また、地下タンク本体３０の近傍には、本発明実施形態の油漏れを検知する漏油検知装置１０が設けられている。地下タンク本体３０から離れた事務所内等には、地下タンク本体３０を統括的に管理するためのデータ処理を行うコンピュータ装置等からなる制御装置４０、地震の揺れを検知する感震センサ４１、及び制御装置４０の処理結果を表示する表示器３９が配置されている。漏洩検知装置４５の検知信号、漏油検知装置１０の検知信号、及び油面計４４の検知信号は、それぞれ信号線により制御装置４０に伝達されるよう接続され、また感震センサ４１による地震検知による弁を開閉制御する制御信号は、信号線により注油口３４側に設けられた制御弁に伝達されるよう接続されている。   FIG. 3 shows the overall structure of the underground tank apparatus 1 provided in the gas station, and an underground tank body 30 for storing any liquid oil such as gasoline, light oil, kerosene, etc. in the underground of the site 2. An oil supply device 31 is erected on the site 2. The upper side of the underground tank body 30 is provided with manhole pits 32, 32 in which the upper surface of the site 2 is made of concrete and manholes are formed on the concrete surface. The underground tank body 30 is provided with an oil supply pipe 33 whose lower end communicates with the inside. The upper end portion side of the oil supply pipe 33 is introduced into a manhole pit 32 at the upper part of the underground tank body 30 and communicated with a pipe having an oil supply port 34 to which an oil supply hose for oil unloaded from the tank truck is connected on the ground. Yes. Further, the underground tank body 30 is provided with an oil supply pipe 35 whose lower end side is communicated with the inside, and the upper end side of the oil supply pipe 35 is communicated with the horizontal draw pipe 36 in the manhole pit 32. The other end side of the horizontal draw pipe 36 is introduced into an oil supply pit 37 formed at the lower portion of the oil supply device 31, led to the upper portion, and communicated with an oil supply mechanism such as a pump of the oil supply device 31. In the manhole pit 32 at the upper part of the underground tank body 30, an underground tank leakage detection device 42 is arranged. Further, in the other manhole pit 32, an elongated stem 43 extends from the upper part to the vicinity of the bottom of the lower underground tank body 30, and the upper end of the stem 43 is a magnetostrictive oil that detects the oil level of the underground tank body 30. An area meter 44 is provided. Further, an oil leakage detection device 45 is disposed in each of the manhole pits 32 and 32 and the oil supply pit 37. In the vicinity of the oil inlet 34, there is provided a ventilation pipe 38 having a lower end portion communicating with an upper space in the underground tank body 30 and an upper end portion opened to the upper space of the site 2. Further, in the vicinity of the underground tank body 30, the oil leakage detection device 10 for detecting the oil leakage of the embodiment of the present invention is provided. In an office or the like away from the underground tank body 30, a control device 40 including a computer device that performs data processing for overall management of the underground tank body 30, a seismic sensor 41 that detects an earthquake shake, and A display 39 for displaying the processing result of the control device 40 is arranged. The detection signal of the leakage detection device 45, the detection signal of the oil leakage detection device 10, and the detection signal of the oil level gauge 44 are connected to be transmitted to the control device 40 through signal lines, respectively, and the earthquake detection by the seismic sensor 41 is performed. The control signal for controlling the opening and closing of the valve is connected so as to be transmitted to the control valve provided on the oil inlet 34 side by a signal line.

本発明の漏油検知装置１０は、図１及び図２に示すように、地下タンク３０近傍の地中に埋設されたガス検知管１１と、このガス検知管１１に設けられた漏洩センサ１３と、ガス検知管１１の上端部側の検知口１２近傍から案内された漏洩センサ１３で検知した信号を制御装置４０に接続するための端子ケース２０と、検知口１２及び端子ケース２０の上面側を覆う保護カバー１５等とから構成されている。 As shown in FIGS. 1 and 2 , the oil leakage detection device 10 of the present invention includes a gas detection pipe 11 embedded in the ground near the underground tank 30, and a leakage sensor 13 provided in the gas detection pipe 11. The terminal case 20 for connecting the signal detected by the leak sensor 13 guided from the vicinity of the detection port 12 on the upper end side of the gas detection tube 11 to the control device 40, and the upper surface side of the detection port 12 and the terminal case 20 It comprises a protective cover 15 and the like for covering.

ガス検知管１１は、地下タンク３０近傍の地中に地表から１０メートル程度の深さまで埋設された有底の筒状体からなり、周壁に漏油が入る多数の小孔が形成され、地表の近傍では金属材料等からなる開口された検知口１２を有するものである。このようなガス検知管１１は、例えば、既存の地下タンク３０に使用されていたものが使用できる。このガス検知管１１内には、底から検知口１２の上部まで漏洩センサ１３が垂直に懸垂張設される。この漏洩センサ１３は、油成分に接触したときに膨潤して電気特性が変化する膨潤抵抗変化型のセンサが使用される。端子ケース２０は、例えば、安全防爆構造から要請される箱型に形成され、ガス検知管１１の上端部側の検知口１２近傍に形成された溝２８内に配置される。このような溝２８は、例えば、検知口１２側面側の地表のコンクリートをカッター等で所定の深さに除去することにより形成される。この端子ケース２０は、上面が開口され内部に端子台２３を設けた端子室２１と、この端子室２１の両側端面から検知口１２側へ帯状に延出された部分を有する導入部２２と、保護カバー１５をビス１６により固定するため取付け部２９とを有する。検知口１２近傍の漏洩センサ１３の上端部側は、端子ケース２０側に向けて曲げられた湾曲部１４が形成されている。この湾曲部１４端部側の漏洩センサ１３の信号線２４は、端子ケース２０の導入部２２から接続部２５を介して端子室２１内に案内されるようになっている。この端子室２１に案内された漏洩センサ１３の信号線２４は、導入部２２と反対側の溝２８に沿って配置された電線管２７に案内されて接続部２６を介して端子室２１内に導入された制御装置４０に接続される信号線に、端子台２３上で接続されるようになっている。端子ケース２０は、信号線２４の接続等が終了した後には、コンクリート等で溝２８内に固定される。保護カバー１５は、検知口１２の上部側から端子ケース２０の上部側をほぼ楕円形に覆う形状に形成されている。この保護カバー１５は、検知口１２の上部側に漏洩センサ１３の湾曲部１４を収容するに十分な大きさの空間部１７が形成され、かつ端子室２１上部の開口部分をパッキン１８で抑えて気密構造で密閉できる形状に形成されている。また、保護カバー１５は、その上面側が車両の車輪や人が踏み付けても漏洩センサ１３や端子ケース２０を保護できる強度を有するとともに、車輪や人が踏み付けても安全な曲面状に形成されている。さらに、保護カバー１５は、取付け部２９に対応する部分に上面側からビス１６を挿入して固定でき、かつビス１６の頭部が表面から突出しないよう凹部状に形成されている。   The gas detection pipe 11 is composed of a bottomed cylindrical body buried in the ground near the underground tank 30 to a depth of about 10 meters from the ground surface, and a plurality of small holes for oil leakage are formed on the peripheral wall. In the vicinity, there is an open detection port 12 made of a metal material or the like. As such a gas detection pipe 11, what was used for the existing underground tank 30 can be used, for example. A leak sensor 13 is vertically suspended from the bottom to the upper part of the detection port 12 in the gas detection tube 11. The leakage sensor 13 is a swelling resistance change type sensor that swells when it comes into contact with the oil component and changes its electrical characteristics. The terminal case 20 is formed in, for example, a box shape required from a safety explosion-proof structure, and is disposed in a groove 28 formed in the vicinity of the detection port 12 on the upper end side of the gas detection tube 11. Such a groove 28 is formed, for example, by removing ground concrete on the side surface of the detection port 12 to a predetermined depth with a cutter or the like. The terminal case 20 includes a terminal chamber 21 having an upper surface opened and a terminal block 23 provided therein, an introduction portion 22 having portions extending from both side end surfaces of the terminal chamber 21 to the detection port 12 side, An attachment portion 29 is provided to fix the protective cover 15 with screws 16. A curved portion 14 that is bent toward the terminal case 20 side is formed on the upper end portion side of the leakage sensor 13 in the vicinity of the detection port 12. The signal line 24 of the leakage sensor 13 at the end of the curved portion 14 is guided from the introduction portion 22 of the terminal case 20 into the terminal chamber 21 through the connection portion 25. The signal line 24 of the leakage sensor 13 guided to the terminal chamber 21 is guided by a conduit 27 arranged along the groove 28 on the side opposite to the introduction portion 22 and enters the terminal chamber 21 via the connection portion 26. The signal line connected to the introduced control device 40 is connected on the terminal block 23. The terminal case 20 is fixed in the groove 28 with concrete or the like after the connection of the signal line 24 is completed. The protective cover 15 is formed in a shape that covers the upper side of the terminal case 20 from the upper side of the detection port 12 in an approximately elliptical shape. The protective cover 15 has a space portion 17 large enough to accommodate the curved portion 14 of the leak sensor 13 on the upper side of the detection port 12, and the opening portion above the terminal chamber 21 is held by the packing 18. It is formed in a shape that can be sealed with an airtight structure. Further, the protective cover 15 has a strength that can protect the leakage sensor 13 and the terminal case 20 even when the upper surface of the protective cover 15 is stepped on by a vehicle wheel or a person, and has a curved surface that is safe even when the wheel or person steps on the protective cover 15. . Further, the protective cover 15 is formed in a concave shape so that the screw 16 can be inserted and fixed to the portion corresponding to the attachment portion 29 from the upper surface side, and the head of the screw 16 does not protrude from the surface.

上記構成の漏油検知装置１０では、ガス検知管１１に底から検知口１２の上部まで膨潤抵抗変化型の漏洩センサ１３を垂直に懸垂張設し、検知口１２側面側の地表を除去して溝２８を形成し、その溝２８に上面が開口した端子室２１を有する端子ケース２０を設け、漏洩センサ１３の上端部側に湾曲部１４を形成して端子室２１内に導入し、端子台２３で制御装置４０に接続される信号線に接続し、検知口１２の上部側から端子ケース２０の上部側を保護カバー１５で覆い、かつ端子室２１上部の開口部分をパッキン１８で気密構造で密閉している。漏洩センサ１３により検知された漏油の検知信号は、信号線を介して制御装置４０に伝達され、処理結果が表示器３９に表示される。漏洩センサ１３を垂直に懸垂張設するため、既存の地下タンク３０に使用されているガス検知管１１であっても、検知口１２の大幅な改造が必要なく利用することができ、かつ検知口１２側面側の地表に形成した溝２８に端子室２１を有する端子ケース２０を設け、漏洩センサ１３の上端部側に端子室２１内に導入し、端子台２３で制御装置４０に接続される信号線に接続するため、簡単な作業で短時間で設置することが可能になる。また、保護カバー１５は、検知口１２の上部側から端子ケース２０の上部側を楕円形に覆い、端子室２１上部の開口部分をパッキン１８で抑えて気密構造で密閉するため、容易に安全防爆構造を実現でき、さらに、上面側が車両の車輪や人が踏み付けても漏洩センサ１３や端子ケース２０を保護、車輪や人が踏み付けても安全で危険防止を図ることができる。   In the oil leakage detection device 10 having the above configuration, a swelling resistance change type leakage sensor 13 is vertically suspended from the bottom to the top of the detection port 12 in the gas detection tube 11, and the ground surface on the side surface of the detection port 12 is removed. A groove 28 is formed, and a terminal case 20 having a terminal chamber 21 having an upper surface opened in the groove 28 is provided. A curved portion 14 is formed on the upper end side of the leakage sensor 13 and introduced into the terminal chamber 21. 23 is connected to a signal line connected to the control device 40, the upper side of the terminal case 20 is covered with the protective cover 15 from the upper side of the detection port 12, and the opening portion at the upper part of the terminal chamber 21 is sealed with a packing 18. It is sealed. The oil leakage detection signal detected by the leakage sensor 13 is transmitted to the control device 40 via the signal line, and the processing result is displayed on the display 39. Since the leakage sensor 13 is vertically suspended, even the gas detection pipe 11 used in the existing underground tank 30 can be used without requiring a significant modification of the detection opening 12, and the detection opening. 12 A terminal case 20 having a terminal chamber 21 is provided in a groove 28 formed on the ground surface on the side surface side, introduced into the terminal chamber 21 on the upper end side of the leakage sensor 13, and a signal connected to the control device 40 by the terminal block 23 Since it is connected to a wire, it can be installed in a short time with a simple operation. Further, the protective cover 15 covers the upper side of the terminal case 20 from the upper side of the detection port 12 in an elliptical shape, and the opening portion of the upper part of the terminal chamber 21 is held by the packing 18 so as to be sealed with an airtight structure. The structure can be realized, and the upper surface side can protect the leak sensor 13 and the terminal case 20 even if the wheel or person steps on the vehicle, and can be safe and prevent danger even if the wheel or person steps.

上記の実施形態において、端子ケース２０及び保護カバー１５の形状や大きさは、任意にでき実施形態に限定されない。   In said embodiment, the shape and magnitude | size of the terminal case 20 and the protective cover 15 can be made arbitrarily, and are not limited to embodiment.

自動車等にガソリン等の燃料を給油する給油所に設置する地下タンクの漏油を検知する地下タンクの漏油検知装置に利用することができる。   The present invention can be used for an oil leak detection device for an underground tank that detects an oil leak of an underground tank installed at a gas station where fuel such as gasoline is supplied to an automobile or the like.

本発明実施形態の給油所の地下タンク装置を説明する全体図である。It is a general view explaining the underground tank apparatus of the gas station of this invention embodiment. 本発明実施形態の漏油検知装置の縦断面図である。It is a longitudinal cross-sectional view of the oil leak detection apparatus of embodiment of this invention. 本発明実施形態の漏油検知装置の平面図である。It is a top view of the oil leak detection apparatus of this invention embodiment.

符号の説明Explanation of symbols

１ 地下タンク装置
２ 敷地
１０ 漏油検知装置
１１ ガス検知管
１２ 検知口
１３ 漏洩センサ
１４ 湾曲部
１５ 保護カバー
１６ ビス
１７ 空間部
１８ パッキン
２０ 端子ケース
２１ 端子室
２２ 導入部
２３ 端子台
２４ 信号線
２５ 接続部
２６ 接続部
２７ 電線管
２８ 溝
２９ 取付け部
３０ 地下タンク本体
３１ 給油装置
３２ マンホールピット
３３ 注油管
３４ 注油口
３５ 給油管
３６ 横引管
３７ 給油ピット
３８ 通気管
３９ 表示器
４０ 制御装置
４１ 感震センサ
４２ 漏洩検知装置
４３ ステム
４４ 油面計
４５ 漏油検知装置 DESCRIPTION OF SYMBOLS 1 Underground tank apparatus 2 Site 10 Oil leak detection apparatus 11 Gas detection pipe 12 Detection port 13 Leakage sensor 14 Bending part 15 Protective cover 16 Screw 17 Space part 18 Packing 20 Terminal case 21 Terminal room 22 Introduction part 23 Terminal block 24 Signal line 25 Connection portion 26 Connection portion 27 Conduit tube 28 Groove 29 Mounting portion 30 Underground tank body 31 Lubrication device 32 Manhole pit 33 Lubrication tube 34 Lubrication port 35 Lubrication tube 36 Horizontal draw pipe 37 Lubrication pit 38 Ventilation tube 39 Display device 40 Control device 41 Sense Seismic sensor 42 Leak detection device 43 Stem 44 Oil level gauge 45 Oil leak detection device

Claims (1)

地下タンク近傍の地中に埋設されたガス検知管と、一端部側が前記ガス検知管内の底に位置し他端部側が該ガス検知管の地表近傍の検知口に位置するよう垂直に懸垂張設して配置された油成分に接触したときに膨張して電気抵抗を変化する膨潤抵抗変化型の漏洩センサと、前記検知口の近傍に配置され前記漏洩センサの他端部側が導入されて漏油検知用の制御装置に信号線で接続する端子室を有する端子ケースと、前記検知口近傍の漏洩センサ上部を覆うとともに前記端子室の上面を密閉する保護カバーとを備え、前記端子ケースは、前記検知口近傍の側面側の地表に形成された溝内に配置され、上面が開口され内部に端子台を設けた端子室と、この端子室の両側端面から前記検知口側へ帯状に延出された導入部と、前記保護カバーをビスにより固定する取付け部とを有し、前記漏洩センサは、その上端部側が前記検知口から前記端子ケース側へ向けて曲げられた湾曲部が形成され、この湾曲部側の前記漏洩センサの信号線が前記導入部から前記端子室内へ案内され、前記端子台上で接続されて前記導入部と反対側の溝に沿って配置された電線管に案内され、かつ前記保護カバーは、その上面が車両の車輪や人が踏み付けても前記漏洩センサと前記端子ケースを保護できる強度を有するとともに前記車輪や人が踏み付けても安全な曲面状に形成されていることを特徴とする地下タンクの漏油検知装置。 A gas detector pipe buried in the ground near the underground tank, and suspended vertically so that one end is located at the bottom of the gas detector pipe and the other end is located at the detection port near the ground surface of the gas detector pipe And a swelling resistance change type leak sensor that expands and changes its electric resistance when it comes into contact with the arranged oil component, and the other end side of the leak sensor that is arranged in the vicinity of the detection port is introduced to leak oil A terminal case having a terminal chamber connected to a control device for detection with a signal line; and a protective cover that covers an upper part of the leakage sensor near the detection port and seals an upper surface of the terminal chamber , Located in a groove formed on the ground surface on the side surface near the detection port, a terminal chamber having an open top surface and a terminal block inside, and extending from the both end surfaces of the terminal chamber to the detection port side in a strip shape The introduction part and the protective cover The leak sensor is formed with a bent portion whose upper end is bent from the detection port toward the terminal case, and the signal line of the leak sensor on the bent portion side is formed. Is guided from the introduction part into the terminal room, is guided on a conduit that is connected on the terminal block and is disposed along a groove opposite to the introduction part, and the upper surface of the protective cover is a vehicle. Oil leakage detection in underground tanks, which has a strength capable of protecting the leakage sensor and the terminal case even when a wheel or a person steps on, and is formed into a curved surface that is safe even when the wheel or person steps on apparatus.
JP2005038560A 2005-02-16 2005-02-16 Underground tank oil leak detection device Expired - Fee Related JP4174682B2 (en)

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