JP7281176B2 - Vertical double shell tank - Google Patents

Vertical double shell tank Download PDF

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JP7281176B2
JP7281176B2 JP2019063543A JP2019063543A JP7281176B2 JP 7281176 B2 JP7281176 B2 JP 7281176B2 JP 2019063543 A JP2019063543 A JP 2019063543A JP 2019063543 A JP2019063543 A JP 2019063543A JP 7281176 B2 JP7281176 B2 JP 7281176B2
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shell
steel
tank
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outer shell
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JP2020164170A (en
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雅之 齊藤
裕人 藤村
純治 大音
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タマダ株式会社
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use

Description

この発明は、液体を貯蔵するタンクに関するもので、筒形の胴部とその両端を閉鎖している鏡板とを備えた筒形タンクであって、胴部の軸方向を鉛直方向にして地中に埋設される二重殻タンクに関するものである。 TECHNICAL FIELD The present invention relates to a tank for storing liquid, and is a cylindrical tank having a cylindrical body and end plates closing both ends of the body. It relates to a double-hulled tank buried in

液体を貯蔵する筒形タンクは、灯油やガソリンなどの燃料油や上水を貯蔵するのに用いられており、通常は建物を建てた敷地の地下に埋設されている。筒形タンクは、通常横置き、すなわち胴部の軸線を水平方向にして設置される。従来、地中に埋設される液体タンクも横置きとされていたが、都市における建築敷地の狭小化とそれに伴う建物の高層化とにより、建物の敷地内に必要な容量の筒形タンクを横置きで設置できなくなってきており、同一容量のタンクをより狭い面積で設置することが可能な縦置きへの要望が高まっている。 Cylindrical tanks for storing liquids are used to store fuel oils such as kerosene and gasoline, as well as clean water. Cylindrical tanks are usually placed horizontally, that is, with the axis of the body in the horizontal direction. In the past, liquid tanks buried in the ground were also installed horizontally. It is no longer possible to install tanks on a stand-alone basis, and there is a growing demand for vertical installation, which allows tanks of the same capacity to be installed in a smaller area.

筒形タンクを縦置きに設置する構造として、鋼製の殻を備えたタンクにスカート状の支持台を溶接して、当該支持台をアンカーボルトなどでコンクリート製の基台に固定する構造が知られている。この支持台は、タンクに接合した短円筒部の下辺に鍔を設けた構造で、短円筒部の上部内側を縦置きにしたタンクの鋼製の胴部の下端部分に溶接接合してタンクと一体化されている。支持台を備えたタンクは、コンクリート製の基台に立設したアンカーボルトを支持台の鍔に設けたボルト穴に挿通してナットで締結することにより、縦置きに設置される。 As a structure for installing a cylindrical tank vertically, a structure is known in which a skirt-shaped support base is welded to a tank with a steel shell, and the support base is fixed to a concrete base with anchor bolts or the like. It is This support base has a structure in which a flange is provided on the lower side of the short cylindrical part that is joined to the tank. are integrated. A tank equipped with a support stand is installed vertically by inserting an anchor bolt erected on a concrete base into a bolt hole provided in a flange of the support stand and fastening with a nut.

地下に埋設されたタンクは、埋設された時点から液漏れ、すなわちタンク内の液体が漏れ出ること及び地下水がタンク内に漏れ入ることを検出するのが困難になる。タンクは、厳重な液漏れ検査をして埋設されるが、埋設後の腐食や地震に伴う地盤の変形による亀裂の発生などによって液漏れが生ずるおそれがあるので、液漏れが生じたときにそれを検出できるようにしなければならない。 From the moment the tank is buried underground, it becomes difficult to detect leaks, i.e. leakage of liquid in the tank and leakage of groundwater into the tank. Tanks are buried after undergoing strict leak inspections, but there is a risk of leaks due to corrosion after burial or cracks due to deformation of the ground due to an earthquake. must be able to detect

埋設後のタンクの液漏れを検出する手段として、タンクをいわゆるＳＦ二重殻構造として液検出器を設置した検出管を設ける構造が推奨されている。この構造は、タンクの殻を鋼殻の内殻と、強化樹脂製の外殻との二重殻構造とするもので、鋼製内殻と樹脂製外殻とは密着しておらず、鋼製内殻の上に樹脂フィルムを巻いてその上に強化樹脂を吹き付けるなどにより、鋼製内殻と樹脂製外殻との間に面的に連通する数十μｍ～数百μｍの隙間（以下及び特許請求の範囲で「殻間隙」と言う。）が存在している。そして、タンク内に下端が殻間隙の下部に開口する検出管を設け、この検出管に液検出器を設けることにより、鋼製内殻を通ってのタンク内液の漏れ及び樹脂製外殻を通っての地下水の漏れをいずれも検出可能にした構造である。 As means for detecting liquid leakage in a buried tank, a structure is recommended in which the tank has a so-called SF double-shell structure and a detection tube with a liquid detector is provided. This structure has a double-shell structure consisting of a steel inner shell and a reinforced resin outer shell. A gap of several tens of μm to several hundred μm (hereinafter referred to as and called "shell interstice" in the scope of claims). A detection tube is provided in the tank, the lower end of which is open to the bottom of the shell gap, and a liquid detector is provided in this detection tube to prevent leakage of liquid in the tank through the steel inner shell and the resin outer shell. It is a structure that makes it possible to detect any leakage of groundwater through.

上記構造のＳＦ二重殻タンクを縦置きに設置する場合、縦置き用の支持台を固定するタンク胴部の下部表面が強化樹脂殻となるため、支持台を強度部材である鋼殻に溶接することができず、従来のような構造の支持台でタンクを支持することができない。また、鋼製内殻に支持台を溶接すると、支持台を溶接した箇所の近辺に殻がＳＦ二重殻構造とならない部分（鋼製内殻と樹脂製外殻との間に殻間隙を形成できない部分）が残り、当該部分での漏れが検出できないという問題が生ずる。 When installing the SF double shell tank of the above structure vertically, the lower surface of the tank body that fixes the support stand for vertical installation becomes a reinforced resin shell, so the support stand is welded to the steel shell which is a strength member. Therefore, it is impossible to support the tank with a support base having a conventional structure. In addition, when the support base is welded to the steel inner shell, the part where the shell does not have the SF double shell structure near the welded support base (a shell gap is formed between the steel inner shell and the resin outer shell) However, there is a problem that leakage cannot be detected at this portion.

鋼製内殻の外側に樹脂製外殻を形成する方法として、本願出願人は、特許文献１において、鋼製内殻の上に微粒子を混入した錆止め塗料を塗布し、その後従来手段で強化樹脂殻を形成することにより、殻間隙に結露が生ずることによるモアレ模様の発生や殻の超音波検査に対する弊害を防止する技術を提案している。 As a method for forming a resin outer shell on the outside of a steel inner shell, the applicant of the present application discloses in Patent Document 1 that a rust preventive paint containing fine particles is applied onto the steel inner shell, and then a reinforced resin is applied by conventional means. By forming shells, we have proposed a technique to prevent moire patterns and adverse effects on ultrasonic inspection of shells due to dew condensation occurring in the gaps between shells.

上記提案における微粒子は、ナイロン樹脂や、ポリエチレン樹脂、エチレン酢酸ビニル樹脂、ポリエステル樹脂等の有機材料、砂やガラス等の無機材料で、好ましくは耐油性、耐水性有機材料を粉砕したものなどが用いられる。微粒子の大きさは、錆止め塗料の表面からその一部が突出する大きさであれば良く、錆止め塗料の一般的な塗布厚みである５０～１００μｍの場合、７５～５００μｍ程度とされている。 The fine particles in the above proposal are organic materials such as nylon resins, polyethylene resins, ethylene vinyl acetate resins, polyester resins, inorganic materials such as sand and glass, and preferably pulverized oil-resistant and water-resistant organic materials. be done. The size of the fine particles should be such that a portion of the particles protrude from the surface of the anticorrosive paint.

特開２００６‐１６０７号公報JP-A-2006-1607

この発明は、ＳＦ二重殻タンクの上記の問題点に鑑み、強度部材となる鋼殻に当該タンクを縦置きで支持する支持台を溶接可能にすると共に、タンクの一部に二重殻構造とならない部分（内殻と外殻との間に殻間隙を設けることができない部分）が生じない構造の縦置き型の二重殻タンクを提供することを課題としている。 In view of the above-mentioned problems of the SF double-shell tank, the present invention makes it possible to weld a support base that supports the tank vertically to the steel shell, which is a strength member, and has a double-shell structure in a part of the tank. To provide a vertically placed double-shell tank having a structure in which no part (a part in which a shell gap cannot be provided between an inner shell and an outer shell) does not occur.

液体を貯留するタンクには、収容された液体の上部に気相部Ａが存在していなければならない。タンクに許容される最大液量を入れたときの液面（最大液面）Ｌの上部が気相部Ａとなる。 In a tank that stores a liquid, the vapor phase portion A must exist above the stored liquid. The upper portion of the liquid level (maximum liquid level) L when the tank is filled with the maximum amount of liquid allowed becomes the gas phase portion A.

この発明の縦置き型二重殻タンクは、外殻２（２ｔ、２ｃ、添字ｔは上下に鏡板を備えたタンク形の殻、添字ｃは下にのみ鏡板を備えたカップ形の殻)を鋼製として、当該外殻と内殻１（１ｃ、１ｔ）との間のタンクに収容される液体の最大液面Ｌより下方部の外殻２と内殻１との間に殻間隙３を形成した縦置き円筒型の二重殻タンクを提供するものである。タンクを縦置きにして基台に固定するための支持台１１は、鋼製の外殻２に溶接してタンク本体と一体化されている。 The vertical double shell tank of the present invention has an outer shell 2 (2t, 2c, suffix t is a tank-shaped shell with upper and lower end plates, and suffix c is a cup-shaped shell with only a lower end plate). As steel, a shell gap 3 is provided between the outer shell 2 and the inner shell 1 below the maximum liquid level L of the liquid contained in the tank between the outer shell and the inner shell 1 (1c, 1t). A formed vertical cylindrical double shell tank is provided. A support base 11 for fixing the tank vertically to the base is welded to the steel outer shell 2 and integrated with the tank body.

すなわちこの発明の縦置き型二重殻タンクは、筒形の胴部６とその少なくとも底部を閉鎖する椀形の底部鏡板７とを備えた鋼製外殻２と、胴部６の軸方向を鉛直方向にして鋼製外殻２を基台９に固定する支持台１１とを備えている。支持台１１は、その短円筒部１２を鋼製外殻の胴部６の下部に嵌合した状態で鋼製外殻２に溶接して鋼製外殻２と一体化されている。 That is, the vertical double-shell tank of the present invention comprises a steel outer shell 2 having a cylindrical body 6 and a bowl-shaped bottom panel 7 closing at least the bottom of the shell, and A support base 11 for fixing the steel outer shell 2 to the base base 9 in a vertical direction. The support base 11 is integrated with the steel outer shell 2 by welding to the steel outer shell 2 with its short cylindrical portion 12 fitted to the lower portion of the body portion 6 of the steel outer shell.

この発明の縦置き型二重殻タンクは、鋼製外殻２の内側に内殻１を備えている。内殻１は、強化樹脂製で、鋼製外殻２に固定されており、タンク内液の最大液面Ｌより下方部の鋼製外殻２との間に殻間隙３を形成している。そして、殻間隙３へのタンク内液及び地下水の漏洩を検出する漏洩検出手段１６、１８を備えている。 The vertical double-shell tank of this invention comprises an inner shell 1 inside a steel outer shell 2 . The inner shell 1 is made of reinforced resin and is fixed to the steel outer shell 2. A shell gap 3 is formed between the inner shell 1 and the steel outer shell 2 below the maximum liquid level L of the liquid in the tank. . Leakage detection means 16 and 18 are provided for detecting leakage of the liquid in the tank and the groundwater into the gap 3 .

内殻１を強化樹脂製の樹脂製内殻１ｃとしたときは、鋼製外殻２ｔの内面の最大液面Ｌより下方部に強化樹脂層２ｆを設け、その強化樹脂層２ｆとその内側に設けた樹脂製内殻１ｃとの間に殻間隙３を設けることができる。また、漏洩検出手段としてタンク底部の殻間隙３に連通された漏洩検出管１６を設けるときは、上部が鋼管１６ｓで下部が樹脂管１６ｆとし、鋼管１６ｓと樹脂管１６ｆとを最大液面より上方の気相部Ａで接続して、樹脂管１６ｆの下端を殻間隙３の底部に連通させる。 When the inner shell 1c made of reinforced resin is used as the inner shell 1c, the reinforced resin layer 2f is provided below the maximum liquid level L of the inner surface of the steel outer shell 2t, and the reinforced resin layer 2f and the inner side thereof A shell gap 3 can be provided between the provided resin inner shell 1c. When the leakage detection pipe 16 communicating with the shell gap 3 at the bottom of the tank is provided as leakage detection means, the upper part is the steel pipe 16s and the lower part is the resin pipe 16f, and the steel pipe 16s and the resin pipe 16f are positioned above the maximum liquid level. , and the lower end of the resin pipe 16f communicates with the bottom of the shell gap 3.

一方、内殻１を鋼製内殻１ｔとしたときは、鋼製外殻２ｃをその胴部６の上縁が開放されかつ底部が鋼製内殻１ｔの底部と同形の椀形としたカップ形とし、鋼製外殻２ｃの内面又は鋼製内殻１ｔの外面に所定間隔で板状のスペーサ２１を溶着して鋼製内殻１ｔを鋼製外殻２ｃ内に挿入することにより、スペーサ２１の板厚に相当する殻間隙３を鋼製外殻２ｃと鋼製内殻１ｔとの間に形成することができる。 On the other hand, when the steel inner shell 1t is used as the inner shell 1, the steel outer shell 2c is a bowl-shaped cup whose upper edge of the body 6 is open and whose bottom is the same shape as the bottom of the steel inner shell 1t. plate-shaped spacers 21 are welded to the inner surface of the steel outer shell 2c or the outer surface of the steel inner shell 1t at predetermined intervals, and the steel inner shell 1t is inserted into the steel outer shell 2c to form a spacer. A shell gap 3 corresponding to the plate thickness of 21 can be formed between the steel outer shell 2c and the steel inner shell 1t.

この発明により、タンクの液相領域の全体を完全な二重殻構造とすることができ、二重殻構造にできない部分が生じないので、地下に埋設後のタンク内液及び地下水の漏れを確実に検知可能で、強度部材となる鋼製外殻に溶接された支持台でタンクを地中の基台に固定することができ、従って、確実で安定した漏洩検出が可能な縦置き円筒型の二重殻タンクを提供できるという効果がある。 According to this invention, the entire liquid phase region of the tank can be made into a complete double-shell structure, and there are no parts that cannot be made into a double-shell structure. The tank can be fixed to the basement in the ground with supports welded to the steel shell, which is a strong member, and therefore, a vertical cylindrical type that can detect leaks reliably and stably. This has the advantage of providing a double shell tank.

この発明の第１実施例を示す断面側面図1 is a sectional side view showing a first embodiment of the invention; FIG. 第１実施例の殻間隙の上縁部の部分拡大断面図Partially enlarged cross-sectional view of the upper edge of the intercellular space of the first embodiment この発明の参考例を示す断面側面図FIG. 2 is a cross-sectional side view showing a reference example of the present invention; 参考例の上縁部の殻間隙を示す部分拡大断面図Partially enlarged cross-sectional view showing the intercellular space at the upper edge of the reference example

図１及び図２は、この発明の第１実施例を示した図である。タンクは、円筒形の胴部６の両端に浅い椀形の鏡板７、８を設けたタンクで、鋼製の外殻２ｔの胴部６の下部に従来構造と同様な構造の縦置き用の支持台１１が溶接されている。支持台１１は、タンクに溶接された短円筒部１２の下辺に鍔１３を設けた構造で、コンクリート製の基台９に立設したアンカーボルトを鍔１３に設けた図示しないボルト穴に挿通してナット止めされる。上下の鏡板７、８は、通常の浅い椀形形状である。鋼製外殻２ｔの外面及び支持台１１には、繊維強化樹脂やノンタールエポキシ、ウレタン塗装などの防錆塗装が施されている。 1 and 2 are diagrams showing a first embodiment of the present invention. The tank has shallow bowl-shaped end plates 7 and 8 on both ends of a cylindrical body 6. Under the body 6 of a steel shell 2t, a vertical tank with the same structure as the conventional structure is installed. Support base 11 is welded. The support base 11 has a structure in which a flange 13 is provided on the lower side of a short cylindrical portion 12 welded to the tank. is nut-fastened. The upper and lower end plates 7, 8 are generally shallow bowl-shaped. The outer surface of the steel outer shell 2t and the support base 11 are coated with antirust coating such as fiber reinforced resin, non-tar epoxy, and urethane coating.

第１実施例のタンクは、内面に強化樹脂層２ｆを設けた鋼製外殻２ｔの内側に樹脂製内殻１ｃを設けた二重殻構造で、最大液面Ｌより下の樹脂製内殻１ｃと鋼製外殻内面の強化樹脂層２ｆとの間に密閉された殻間隙３が存在している。殻間隙３は、図では誇張して描かれているが、実際には数十μｍ～数百μｍの間隙である。 The tank of the first embodiment has a double shell structure in which a resin inner shell 1c is provided inside a steel outer shell 2t provided with a reinforced resin layer 2f on the inner surface. A closed shell gap 3 exists between 1c and the reinforcing resin layer 2f on the inner surface of the steel outer shell. The intershell 3 is drawn exaggeratedly in the figure, but actually it is a gap of several tens of μm to several hundreds of μm.

殻間隙３は、最大液面Ｌより上に上縁Ｅが位置するように、鋼製外殻２ｔの内面に強化樹脂層２ｆとなる強化樹脂を吹き付け、吹き付けた強化樹脂が乾かないうちにその内面に樹脂フィルムなどの中込材３１を貼り付け、その上に更に樹脂製内殻１ｃとなる強化樹脂を吹き付けることにより形成される。すなわち、最大液面Ｌより下の部分に、硬化した鋼製外殻内面の強化樹脂層２ｆと樹脂製内殻１ｃとの間に殻間隙３が設けられる。 The shell gap 3 is formed by spraying a reinforced resin that will become the reinforced resin layer 2f on the inner surface of the steel outer shell 2t so that the upper edge E is positioned above the maximum liquid level L, and before the sprayed reinforced resin dries. It is formed by affixing a filling material 31 such as a resin film on the inner surface and spraying a reinforced resin thereon to form the resin inner shell 1c. That is, in a portion below the maximum liquid level L, a shell gap 3 is provided between the reinforced resin layer 2f on the inner surface of the hardened steel outer shell and the resin inner shell 1c.

樹脂製内殻１ｃとなる硬化樹脂は、鋼製外殻の強化樹脂層２ｆ及びその内側の中込材３１の上縁Ｅより所定幅（１５ｃｍ以上）上方にまで吹き付けて、樹脂製内殻１ｃの上縁部を鋼製外殻２ｔの内面に密着させた密着部５を設けて、殻間隙３を密閉している。鋼製外殻２ｔの内面の強化樹脂層２ｆ及び密着部５を設ける部分は、強化樹脂を吹き付ける前に、サンドブラストなどの下地処理とプライマー塗装などの下地塗装を行う。 The hardened resin that will form the resin inner shell 1c is sprayed to a predetermined width (15 cm or more) above the upper edge E of the reinforced resin layer 2f of the steel outer shell and the filling material 31 inside it to form the resin inner shell 1c. The shell gap 3 is sealed by providing a contact portion 5 in which the upper edge portion is brought into close contact with the inner surface of the steel outer shell 2t. Prior to spraying the reinforced resin on the inner surface of the steel outer shell 2t where the reinforced resin layer 2f and the adhesion portion 5 are to be provided, surface treatment such as sandblasting and surface coating such as primer coating are performed.

図示しない液検出器を収容した検出管１６は、上部が鋼管１６ｓで下部が樹脂管１６ｆであり、鋼管１６ｓと樹脂管１６ｆとは、タンクの気相部Ａで接続されている。樹脂管１６ｆの下端は、樹脂製内殻１ｃの底面に接合されて殻間隙３の最下部に開口しており、上端は上部鏡板８を貫通して引き出されている。液検出器の検出信号線は、検出管１６の上端から引き出されて、図示しない液漏れ検出器に接続されている。 A detection tube 16 containing a liquid detector (not shown) has a steel tube 16s at the top and a resin tube 16f at the bottom. The lower end of the resin pipe 16f is joined to the bottom surface of the resin inner shell 1c and opens at the bottom of the shell gap 3, and the upper end penetrates the upper end plate 8 and is drawn out. A detection signal line of the liquid detector is pulled out from the upper end of the detection tube 16 and connected to a liquid leak detector (not shown).

タンクの上部鏡板８には、配管用と点検用との２個のマンホール１４、１５が設けられている。タンクは、支持台１１を地中のタンク収納部の底面に設けたコンクリート製の基台９にアンカーボルトなどで固定することにより、縦置きで安定かつ強固に設置される。鋼製外殻２ｔの腐食や亀裂により生じた地下水の漏れや、樹脂製内殻１ｃの劣化や亀裂により生じたタンク内液の漏れは、殻間隙３の最下部から検出管１６内に流入し、検出管１６の下端部分に収納された液検出器で検出される。 Two manholes 14 and 15 for piping and inspection are provided on the upper end plate 8 of the tank. The tank is installed vertically stably and firmly by fixing the support table 11 to a concrete base 9 provided on the bottom surface of the underground tank storage section with anchor bolts or the like. Leakage of groundwater caused by corrosion or cracking of the steel outer shell 2t, or leakage of liquid in the tank caused by deterioration or cracking of the resin inner shell 1c flows into the detection tube 16 from the bottom of the shell gap 3. , is detected by a liquid detector housed in the lower end portion of the detection tube 16 .

図３及び図４に示す参考例は、カップ形の鋼製外殻２ｃの内側に鋼製内殻１ｔを挿入して、収容される液体の最大液面Ｌより下を二重殻構造としたタンクである。鋼製内殻１ｔは、円筒形の胴部の両端に浅い椀形の鏡板７、８を設けた形状である。一方、鋼製外殻２ｃは、円筒形の胴部６と浅い椀形の底部鏡板７を備えたカップ形である。タンクを縦置きで支持する支持台１１及び基台９は、第１実施例と同様な構造で、支持台１１の短円筒部１２が鋼製外殻２ｃの胴部６の下部に溶接されている。鋼製内殻１ｔの外面、鋼製外殻２ｃの内外面及び支持台１１には、繊維強化樹脂やノンタールエポキシ、ウレタン塗装などの防錆塗装が施されている。 In the reference example shown in FIGS. 3 and 4, a steel inner shell 1t is inserted inside a cup-shaped steel outer shell 2c to form a double shell structure below the maximum liquid level L of the liquid to be accommodated. is a tank. The steel inner shell 1t has a shape in which shallow bowl-shaped end plates 7 and 8 are provided at both ends of a cylindrical body. On the other hand, the steel shell 2c is cup-shaped with a cylindrical body 6 and a shallow bowl-shaped bottom panel 7 . The support base 11 and the base 9 for supporting the tank in a vertical position have the same structure as in the first embodiment. there is The outer surface of the steel inner shell 1t, the inner and outer surfaces of the steel outer shell 2c, and the support base 11 are coated with antirust coating such as fiber reinforced resin, non-tar epoxy, and urethane coating.

鋼製内殻１ｔの外周面及び底面には、適宜間隔で薄い、好ましくは６ｍｍ以下の厚さの、円板状や矩形板状のスペーサ２１が溶接されている。鋼製内殻１ｔは、上部が開放された鋼製外殻２ｃの中に挿入されており、最大液面Ｌより下方の鋼製内殻１ｔと鋼製外殻２ｃとの間には、スペーサ２１の板厚に相当する殻間隙３が形成されている。殻間隙３の上縁は、全周に渡って鋼製外殻２ｃの上縁と鋼製内殻１ｔの外面とを溶接３２することにより、閉鎖されている。 Disk-shaped or rectangular plate-shaped spacers 21 having a thickness of preferably 6 mm or less are welded at appropriate intervals to the outer peripheral surface and the bottom surface of the steel inner shell 1t. The steel inner shell 1t is inserted into the steel outer shell 2c which is open at the top, and a spacer is provided between the steel inner shell 1t below the maximum liquid level L and the steel outer shell 2c. A shell gap 3 corresponding to the plate thickness of 21 is formed. The upper edge of the intershell gap 3 is closed by welding 32 the upper edge of the steel outer shell 2c and the outer surface of the steel inner shell 1t over the entire circumference.

参考例の漏洩検出手段は、殻間隙３に不凍液を注入しておき、殻間隙３からの不凍液の漏出や殻間隙３へのタンク内液や地下水の漏入によるその液面Ｓの変化を漏洩検出部１８で検出することにより、鋼製内殻１ｔや鋼製外殻２ｃの漏れを検出する構造である。
The leakage detection means of the reference example is such that an antifreeze solution is injected into the gap 3, and changes in the liquid surface S due to leakage of the antifreeze solution from the gap 3 and leakage of the liquid in the tank or groundwater into the gap 3 are detected. It is a structure that detects leakage of the steel inner shell 1t and the steel outer shell 2c by detecting with the detection unit 18. As shown in FIG.

１（１ｃ、１ｔ） 内殻
２（２ｔ、２ｃ） 外殻
２ｆ 強化樹脂層
３ 殻間隙
６ 胴部
７ 底部鏡板
９ 基台
１１ 支持台
１２ 短円筒部
１６ 漏洩検出管
１６ｓ 鋼管
１６ｆ 樹脂管
１８ 漏洩検出部
２１ スペーサ
Ａ 気相部
Ｌ 液面 1 (1c, 1t) Inner shell 2 (2t, 2c) Outer shell 2f Reinforced resin layer 3 Shell gap 6 Body portion 7 Bottom panel 9 Base 11 Support 12 Short cylindrical portion 16 Leak detection tube 16s Steel pipe 16f Resin pipe 18 Leakage Detection part 21 Spacer A Gas phase part L Liquid level

Claims (1)

円筒形の胴部とその少なくとも底部を閉鎖する椀形の鏡板とを備えた鋼製外殻と、前記胴部の軸方向を鉛直方向にして当該鋼製外殻を基台に固定する支持台とを備え、当該支持台がその短円筒部を前記鋼製外殻の胴部の下部に嵌合した状態で鋼製外殻に溶接して鋼製外殻と一体化されている液体タンクにおいて、
少なくとも当該タンクに収容される液体の最大液面より下方部内面に前記鋼製外殻に固定されて当該鋼製外殻との間に殻間隙を形成している強化樹脂製の内殻と、前記殻間隙へのタンク内液及び地下水の漏入を検出するためのタンク底部の前記殻間隙に連通された漏洩検出管と当該漏洩検出管内に設けた液検出器からなる漏洩検出手段とを備え、
当該漏洩検出手段は、上部が鋼管で下部が樹脂管でありかつ当該鋼管と樹脂管とが前記最大液面より上方の気相部で接続されている、
縦置き型二重殻タンク。 A steel shell having a cylindrical body and a bowl-shaped end plate that closes at least the bottom of the shell; and wherein the support base is integrated with the steel shell by being welded to the steel shell with its short cylindrical portion fitted to the lower part of the body of the steel shell ,
an inner shell made of reinforced resin fixed to the steel outer shell at least on the inner surface below the maximum liquid level of the liquid contained in the tank and forming a shell gap with the steel outer shell ; Leak detection means comprising a leak detection tube communicating with the shell gap at the bottom of the tank for detecting leakage of tank liquid and groundwater into the shell gap, and a liquid detector provided in the leak detection tube . ,
The leakage detection means has a steel pipe at the top and a resin pipe at the bottom, and the steel pipe and the resin pipe are connected at a gas phase portion above the maximum liquid level.
Vertically placed double shell tank.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005088993A (en) 2003-08-08 2005-04-07 Komuro Giken:Kk Regeneration structure of underground steel tank
JP2011137652A (en) 2009-12-25 2011-07-14 Enviro Tech International Inc Method for inspecting breakage of underground buried object
JP2015013677A (en) 2013-07-05 2015-01-22 キョーラク株式会社 Liquid storage tank
JP2017085834A (en) 2015-10-30 2017-05-18 株式会社サンフロイント Oil leakage notification system
JP6192148B1 (en) 2017-02-09 2017-09-06 株式会社技研 Tank underground installation structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5222299A (en) * 1975-08-13 1977-02-19 Hitachi Zosen Corp Floating system oil storage tank using readily-available tanker and pr oduction mehod therefor
JPS59142982A (en) * 1983-02-01 1984-08-16 株式会社　東京タツノ Double tank
JP2769801B2 (en) * 1995-07-10 1998-06-25 九州積水工業株式会社 Installation method of FRP double shell tank for underground liquid hazardous materials

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005088993A (en) 2003-08-08 2005-04-07 Komuro Giken:Kk Regeneration structure of underground steel tank
JP2011137652A (en) 2009-12-25 2011-07-14 Enviro Tech International Inc Method for inspecting breakage of underground buried object
JP2015013677A (en) 2013-07-05 2015-01-22 キョーラク株式会社 Liquid storage tank
JP2017085834A (en) 2015-10-30 2017-05-18 株式会社サンフロイント Oil leakage notification system
JP6192148B1 (en) 2017-02-09 2017-09-06 株式会社技研 Tank underground installation structure

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