JP2004059006A - Membrane-lined spherical reservoir - Google Patents

Membrane-lined spherical reservoir Download PDF

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JP2004059006A
JP2004059006A JP2002216125A JP2002216125A JP2004059006A JP 2004059006 A JP2004059006 A JP 2004059006A JP 2002216125 A JP2002216125 A JP 2002216125A JP 2002216125 A JP2002216125 A JP 2002216125A JP 2004059006 A JP2004059006 A JP 2004059006A
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Prior art keywords
membrane
storage tank
film
spherical
shell
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JP2002216125A
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Japanese (ja)
Inventor
Koji Ishii
石井 宏治
Masanori Tamada
玉田 正則
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Ishii Iron Works Co Ltd
株式会社石井鐵工所
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Priority to JP2002216125A priority Critical patent/JP2004059006A/en
Publication of JP2004059006A publication Critical patent/JP2004059006A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a functional and economical membrane-lined spherical reservoir wherein a corrosive substance of contents is shut up, a membrane can be simply removed for open inspection, so that the inner wall surface of the reservoir and a welded joint can be fully, simply and easily inspected, and the coat can be simply formed again after the inspection is completed. <P>SOLUTION: The inner wall surface of a spherical shell of a spherical reservoir for storing a corrosive liquid or gas is coated with a flexible membrane having airtightness, fluid-tightness and corrosion resistance, and the membrane is secured by a membrane fixing tool at a plurality of positions. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
この発明は、腐食性を有する液体や気体を大気圧以上の圧力で貯蔵する球形貯槽の内壁面を、可撓性膜体にて被覆形成する膜ライニング球形貯槽に関するものである。
【0002】
【従来の技術】
腐食性を有する液体や気体を大気圧以上の圧力で貯蔵する球形貯槽には、例えば硫化水素やアンモニア、塩素などの腐食性物質を含有する内容物を大気圧以上の高い圧力で貯蔵する球形貯槽がある。
この球形貯槽の本体材料は、例えば炭素鋼とステンレス鋼の合せ板よりなる耐食性のクラッド鋼が使用されたり、或いは炭素鋼の貯槽本体の内面に、薄板のステンレス鋼などの耐食性鋼板をライニングする方法などによって防食対策が採られている。
【0003】
【発明が解決しようとする課題】
上記貯槽本体にクラッド鋼が使用された従来の球形貯槽は、異種金属の合せ板であり、切断、加工や溶接作業に難しいものであった。
また、この異種金属は、熱膨張係数や合金成分が大きく異なり、ガス切断時には、熱収縮の違いにより、異種金属の合せ板境界部が剥離したり、球殻本体同士の溶接継手部(接合部)では溶接熱収縮や溶接金属部の成分(異種金属母材成分の溶込み)により割れが発生しやすく、充分な製作技術、施工技術と施工管理や非破壊検査などを必要としていた。
【0004】
また、上記貯槽本体内面に薄板のステンレス鋼がライニングされた従来の球形貯槽は、球殻本体材は炭素鋼、ライニング材はステンレス鋼であり、本体とライニング材との溶接接合は異種金属となるため、特殊な溶接材料の使用や溶接割れ防止の施工管理や充分な検査を必要としていた。
【0005】
この耐食性鋼板のライニング材は、薄板を使用しているが、建設時に平板状態となるため、球殻内壁面との間に隙間を生ずる。
そして、貯槽の稼動時には、貯槽内部は大気圧以上の高い内圧力となり、ライニング板は球殻内壁面に密接するが、貯槽本体とライニング材との溶接接合部には引張応力が発生し、溶接部の割れの発生要因になっている。
【0006】
そして、クラッド鋼及びステンレスライニング材は、異種金属であって、貯槽内部の圧力変動や外気温の変化による貯槽本体の収縮は、線膨張係数が大きく違い、本体の伸びとライニング材との伸びが異なり、溶接接合部に大きな応力が負荷され溶接部の割れの発生要因になっている。
また、上記球形貯槽の法定検査等の開放検査時には、クラッド鋼のステンレス鋼板内表面やステンレス鋼ライニング材内表面、およびその内表面にある溶接部の検査はそのまま表面からできるが、球殻本体及びその内表面や溶接継手部の検査はそのまま表面からはできないため、球形貯槽本体の安全性と信頼性の確認が困難であった。
【0007】
そこで、球殻本体を検査するためには、内表面のライニング材を取外して球殻本体部を検査しなければならず、手間と時間と費用が膨大なものであった。
また、ライニング材等の取外し、取付けを行わなければならないので、球殻本体材に損傷を与えたり、補修による繰返し溶接によって球殻本体材に悪影響を与えていた。
【0008】
この発明は、上述の課題を解決するためになされたもので、球形貯槽内壁面に、気密性、液密性及び耐食性を有する可撓性膜体を被覆し、貯槽本体から内容物の腐食性物質を遮断するとともに、開放検査時には膜体を簡単に取外し、貯槽内壁面や溶接継手部の検査を充分にかつ簡単容易に実施することができ、検査終了後には再度、簡単に貯槽内壁面に膜体を被覆形成することができる機能的で経済的にも優れた膜ライニング球形貯槽を提供する。
【0009】
【課題を解決するための手段】
この発明に係る膜ライニング球形貯槽は、腐食性を有する液体や気体を貯蔵する球形貯槽の球殻内壁面を、気密性、液密性及び耐食性を有する可撓性膜体で被覆し、その複数箇所を膜体固定具で保持するものである。
【0010】
また、上記可撓性膜体は、球形貯槽の球殻内壁面に、両面粘着テープ等の着脱可能な接着部材を用いて密着形成するものである。
【0011】
さらにまた、上記可撓性膜体を保持する膜体固定具は、おわん状の覆い膜体で被覆し、該覆い膜体の周縁を、上記球殻内壁面の可撓性膜体の上面に、気密及び又は液密に固着形成するものである。
【0012】
【発明の実施の形態】
図1乃至図3に基づいて、この発明に係る膜ライニング球形貯槽の実施形態例について説明する。
図1は、膜ライニングを適用した球形貯槽の断面説明図、図2は、その球殻体部分の断面図、図3は、膜体固定具近傍の断面図である。
【0013】
腐食性を有する液体や気体などを貯蔵する貯槽本体1は、球殻体2と、この球殻体2を支える複数の脚柱3と、上下のマンホール4,4、及び液出入り用等のノズル5などから形成されている。
そして、6は球殻体2の内壁面に被覆した気密性、液密性及び耐食性を有する殻状膜体で、その所要個所を複数の膜体固定具8にて球殻体2の内壁面に固着している。
【0014】
膜ライニング球形貯槽の施工手順について、概略説明する。
貯槽本体1は、炭素鋼材などを用いて球殻状に組立て、溶接施工によって一体に建設する。
【0015】
次いで、貯槽内面の所要箇所に、複数のボルト等の膜体固定材をスタッド溶接や隅肉溶接にて取付ける。
【0016】
続いて、貯槽本体1の非破壊検査や耐圧、気密試験を終了し、球殻内壁面の清掃を行う。
【0017】
次いで、可撓性を有する殻状膜体6を現場で展開し、この殻状膜体6の開孔部を上記ボルト等の膜体固定材に挿通し、ナットで締付けて固定することによって、球殻体2の内壁面に殻状膜体6を取付ける。
この場合、仮に殻状膜体6が皺になっていても可撓性を有する膜材を使用するため、球形貯槽の稼動時には貯槽内部の圧力によって殻状膜体6は球殻内壁面になじんで密着する。
【0018】
さらに密着性を良くするためには、図2に示すように、球殻体2の内壁面と可撓性膜材の殻状膜体6とが密着保持可能となるように、例えば両面粘着テープ等の接着部材7を球殻内壁面の全面に貼り付けて、その上に殻状膜体6を接着させる。
そして、球殻内壁面と殻状膜体6との間に空気が残らないように空気を排出しながら、両面粘着テープ等の接着部材7に沿って殻状膜体6を上から押えて球殻体内壁面に密着させる。球形貯槽の稼動時には、貯槽内部に高い圧力がかかった状態であるため、両面粘着テープ等の接着部材7や殻状膜体6が剥がれることもない。
【0019】
この両面粘着テープは、例えば、紙や布、或いは塩化ビニル、ポリオレフィン、ポリエチレン等の合成樹脂材をフィルム基材とし、合成ゴムやアクリル系樹脂剤、或いは高性能ボンド等を粘着剤ベースとしたものであって、簡単に付着しかつ取外しが可能となる部材を使用する。
【0020】
球殻内壁面と殻状膜体6との間の空気を完全に除去したい時には、上下マンホール4,4やノズル5等、附属品部の内周縁の膜体固定部をシールし、上下マンホール4,4の各々に空気排出口を取付け(図示せず)真空装置等によって球殻体2内壁面と殻状膜体6との間の空気を排気し、殻状膜体6を球殻内壁面へ密着させる。
【0021】
殻状膜体6は、予め工場等で一体成形し、現場にて展開して球殻体2の内壁面に両面粘着テープ等の接着部材7で一度に貼り付けるようにしてもよく、或いは工場等で中央水平線から上下に分割し、さらに経線方向に分割して製作した複数の膜片を、現場にて熱溶着や接着剤によって、気密及び液密に膜片同志を接合しながら、順次球殻体2内壁面の両面粘着テープ等の接着部材7に貼り合わせて密着させるようにしてもよい。
【0022】
殻状膜体6の取付構造、膜体固定具8の実施形態例について、図3に基づいてさらに詳細に説明する。
図3(a)は、図1の膜体固定具8を示す縦断面図で、図3(b)は、その斜視説明図である。
【0023】
図3(a),(b)に示すように、球殻体2の内壁面の要所にボルト9をスタッド溶接や隅肉溶接にて立設し、このボルト9に、殻状膜体6の開孔部を合わせて挿通し、その上部に円板状の押え材10を挿通して被せ、その上からナット11で締付けて固定する。
【0024】
そして、上記ボルト9とナット11の上部に、合成樹脂製などの柔軟性部材よりなる保護キャップ12を被せる。
【0025】
上記固定箇所の上方に、殻状膜体6と同質材の略半球殻形状で、おわん状の覆い膜13を被せ、この覆い膜13の周縁先端部を、殻状膜体6上面へ熱溶着や接着剤で気密かつ液密に固着する。
【0026】
なお、上記押え材10の下部には、球殻体2の内壁面になじむように、円盤状の合成樹脂材や合成ゴム材などよりなる弾力部材14を介装する。
【0027】
そして、開放検査時には、膜体固定具8の覆い膜13を切り取り、ナット11などの螺着部材を取外して殻状膜体6を剥離し、両面粘着テープ等の接着部材7を取外して球殻本体の検査を行う。
【0028】
開放検査終了後の修復は、球殻内壁面に新しい両面粘着テープ等の接着部材7と、使用していた殻状膜体6を前記の方法で再度貼り付け、その要所をボルトとナット等で球殻膜体6を固定し、覆い膜13を新規に製作して、現場にて熱溶着や接着剤にて気密かつ液密に固着する。
【0029】
なお、スラッジや堆積物等が生じる貯槽の場合には、殻状膜体6と一体に堆積物等を除去する。
【0030】
このように、清掃や点検などメンテナンスの時に、殻状膜体6を取外して堆積物等と一緒にまとめて除去することができるため、清掃が簡単で、殻状膜体6の取替えを簡単に行うことが可能となり、作業性良く経済的にメンテナンスや点検、検査を行うことができる。
さらに、検査のために行う球殻体2内壁面の清掃や表面研磨などの前処理も、建設時と同じ状態が保持されているため簡単な作業ですみ、補修範囲も少なく、工期も短縮することができるため、検査のための経費を大幅に低減することが可能となる。
【0031】
そして、殻状膜体6に堆積物や付着物等の固着が激しい場合には、殻状膜体6は堆積物や付着物等と一緒に廃棄処分し、貯槽の修復時には、工場にて製作した新規の殻状膜体6を取付ける。この新規殻状膜体6の取付けは、前記と同様の方法で、簡単に取付け被覆施工することができる。
【0032】
上記殻状膜体2に使用する膜材は、長期間にわたって気密性及び液密性を有し、強靭かつ高耐食性、耐薬品性、耐久性を備えた可撓性シート体を使用する。
このシート体は、例えば塩化ビニール樹脂、オレフィン系樹脂、エチレン酢酸ビニール樹脂等の合成樹脂材で形成した膜材、或いはポリエステル繊維やガラス繊維等の繊維に、塩化ビニール樹脂、オレフィン系樹脂、エチレン酢酸ビニール樹脂等の合成樹脂をコーティングした布膜材のシート体、若しくは各種繊維に合成ゴム材をコーティングしたシート体などを用いる。
【0033】
そして、殻状膜体6は軽量な可撓性シート部材で、溶着や接着などによって安価に製作することができ、かつ作業性良く安全に被覆施工及び固定施工することができるので、経済性に優れたライニング構造となる。
なおこの膜体部材は、貯槽内部に位置し太陽の紫外線の影響を受けることがないので、野外設置の膜構造物などと比較して、より長期間の耐久性が得られる。
【0034】
【発明の効果】
叙述の説明で明らかなように、この発明に係る膜ライニング球形貯槽は、腐食性を有する液体や気体を貯蔵する球形貯槽の球殻内壁面を、気密性、液密性及び耐食性を有する可撓性膜体で被覆し、その複数箇所を膜体固定具で保持するので、貯槽本体内壁面は膜体によって内容物の腐食性物質から遮断されているため、貯槽本体内壁面は腐食の影響を受けることがなく、貯槽内部の内圧変動や外気温の影響による貯槽本体の収縮が生じた場合に、伸縮の大きい可撓性膜体はその影響を受けることがなく安全なライニング構造となる。
そして、可撓性膜体の被覆施工は、従来の溶接ライニング施工のような溶接熱影響等を貯槽本体に与えることなく、貯槽本体に対して熱や歪みの悪影響はなく、稼動中は内圧力で球殻内壁面に密着維持することができるので、機能的で安全性に優れたものとなる。
また、可撓性膜体は軽量な部材で安価に製作することができ、かつ作業性良く安全に施工することができるので、経済性に優れたライニング構造となる。
また、従来、クラッド鋼やステンレス材のライニング構造で困難であった開放検査時の貯槽本体の検査が、殻状膜体を簡単容易に取外しすることで可能となり、貯槽の安全性及び信頼性が確保できるとともに、開放検査に要する費用や工期を大幅に低減することができる。
そして、検査のための清掃や表面研磨などの前処理も容易で、補修範囲も少なく、工期も短縮することができ、検査のための経費を大幅に低減することが可能となり、メンテナンス終了後には、使用していた殻状膜体又は新規な殻状膜体を簡単に取付け被覆施工することができる。
さらにまた、清掃や点検などメンテナンスの時には、殻状膜体を簡単容易に取外して付着物や堆積物と一緒にまとめて除去することができるため、清掃が簡単で、膜材の取替えを簡単に行うことが可能となり、作業性良く経済的に清掃や点検などを行うことができる。
【0035】
また、上記可撓性膜体は、球形貯槽の球殻内壁面に、両面粘着テープ等の着脱可能な接着部材を用いて密着形成するので、球殻内壁面と殻状膜体との間にエアーポケットを作ることなく完全に球殻内壁面へ密着でき、作業性良く簡単容易に施工することができる。
そして、貯槽の稼動中には、貯槽内部の圧力で球殻内壁面に密着維持することができ、さらに開放検査時の取外しの際には、着脱可能な両面粘着テープ等の接着部材であるので、無理なく簡単容易に可撓性膜体及び両面粘着テープを剥すことができるため、開放検査時の貯槽本体の検査が可能となり、検査やメンテナンスの作業工期も短く、経済性にも優れたライニング構造となる。
【0036】
また、上記可撓性膜体を保持する膜体固定具は、おわん状の覆い膜体で被覆し、該覆い膜体の周縁を、上記球殻内壁面の可撓性膜体の上面に、気密及び又は液密に固着形成するので、膜体固定材は内容物から遮蔽されるため、腐食や損傷を受けることがないので、固定材は耐食性材料を使用する必要はなく安価な炭素鋼等の材料でよく、耐久性も向上し、また腐食や損傷による内容物への汚染も生ずることがない。
そして、被覆し固着する作業は熱溶着や接着剤にて簡単容易にでき、また点検時などに取り外す際にも、簡単容易に切断して除去することができる。
【0037】
【図面の簡単な説明】
【図1】この発明に係る膜ライニング球形貯槽の実施形態例を示す縦断面説明図である。
【図2】図1の球殻体部分を示す断面説明図である。
【図3】(a)は、膜体固定具近傍の縦断面説明図、(b)は、その斜視説明図である。
【符号の説明】
1 貯槽本体     2 球殻体          3 脚柱
4 マンホール    5 ノズル          6 殻状膜体
7 接着部材          8 膜体固定具      9 ボルト
10 押え材          11 ナット        12 キャップ
13 覆い膜          14 弾力材
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a membrane-lined spherical storage tank in which the inner wall surface of a spherical storage tank for storing corrosive liquid or gas at a pressure higher than the atmospheric pressure is covered with a flexible film.
[0002]
[Prior art]
Spherical storage tanks for storing corrosive liquids and gases at a pressure higher than atmospheric pressure include, for example, spherical storage tanks for storing contents containing corrosive substances such as hydrogen sulfide, ammonia, and chlorine at a pressure higher than the atmospheric pressure. There is.
The body material of the spherical storage tank is, for example, a corrosion-resistant clad steel made of a laminated plate of carbon steel and stainless steel, or a method of lining a corrosion-resistant steel plate such as a thin stainless steel on the inner surface of the carbon steel storage tank body. Anticorrosion measures have been adopted by such means.
[0003]
[Problems to be solved by the invention]
The conventional spherical storage tank in which clad steel is used for the storage tank body is a plywood of dissimilar metals, which is difficult to cut, process and weld.
In addition, these dissimilar metals have significantly different coefficients of thermal expansion and alloy components. During gas cutting, due to differences in thermal shrinkage, the boundary of the dissimilar metals is peeled off, or the welded joint (joint joint) between the spherical shell bodies is formed. In (2), cracks are likely to occur due to welding heat shrinkage and components of the weld metal part (penetration of dissimilar metal base metal components), and sufficient production technology, construction technology, construction management, nondestructive inspection, and the like were required.
[0004]
Further, in the conventional spherical storage tank in which a thin plate of stainless steel is lined on the inner surface of the storage tank body, the spherical shell body material is carbon steel, the lining material is stainless steel, and the welded joint between the main body and the lining material is a dissimilar metal. Therefore, the use of special welding materials, construction management to prevent welding cracks, and sufficient inspection were required.
[0005]
Although a thin plate is used as the lining material of the corrosion-resistant steel plate, it becomes flat at the time of construction, so that a gap is formed between the lining material and the inner wall surface of the spherical shell.
During operation of the storage tank, the inside of the storage tank has a high internal pressure higher than the atmospheric pressure, and the lining plate is in close contact with the inner wall surface of the spherical shell, but a tensile stress is generated at the welded joint between the storage tank body and the lining material, This is the cause of cracking of the part.
[0006]
The clad steel and the stainless steel lining material are different metals, and the shrinkage of the storage tank main body due to the pressure fluctuation inside the storage tank or the change of the outside air temperature has a greatly different linear expansion coefficient, and the elongation of the main body and the expansion of the lining material are different. On the contrary, a large stress is applied to the welded joint, which causes a crack in the welded part.
In addition, at the time of the open inspection such as the legal inspection of the spherical storage tank, the inspection of the inner surface of the stainless steel plate of the clad steel, the inner surface of the stainless steel lining material, and the welded portion on the inner surface can be performed directly from the surface. Inspection of the inner surface and the welded joint cannot be performed directly from the surface, making it difficult to confirm the safety and reliability of the spherical storage tank body.
[0007]
Therefore, in order to inspect the spherical shell main body, it is necessary to remove the lining material on the inner surface and inspect the spherical shell main body, which is enormous in labor, time and cost.
In addition, since the lining material and the like must be removed and attached, the spherical shell body material is damaged, and the repeated welding by repairing has an adverse effect on the spherical shell body material.
[0008]
The present invention has been made in order to solve the above-mentioned problems, and covers the inner wall surface of a spherical storage tank with a flexible film having airtightness, liquid tightness and corrosion resistance, and removes the corrosiveness of the contents from the storage tank body. In addition to shutting off the substance, the membrane can be easily removed at the time of the open inspection, and the inspection of the inner wall surface of the storage tank and the welded joint can be sufficiently and easily performed. Provided is a functionally and economically excellent membrane-lined spherical storage tank capable of coating and forming a membrane.
[0009]
[Means for Solving the Problems]
The spherical lining membrane tank according to the present invention covers the inner wall surface of a spherical shell of a spherical storage tank storing a corrosive liquid or gas with a flexible membrane having airtightness, liquid tightness and corrosion resistance. The portion is held by the membrane fixing device.
[0010]
Further, the flexible film is formed in close contact with the inner wall surface of the spherical shell of the spherical storage tank using a detachable adhesive member such as a double-sided adhesive tape.
[0011]
Furthermore, the film body fixing device holding the flexible film body is covered with a bowl-shaped covering film body, and a peripheral edge of the covering film body is formed on an upper surface of the flexible film body on the inner wall surface of the spherical shell. , Air-tight and / or liquid-tight.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the membrane-lined spherical storage tank according to the present invention will be described with reference to FIGS.
FIG. 1 is an explanatory cross-sectional view of a spherical storage tank to which a membrane lining is applied, FIG. 2 is a cross-sectional view of a spherical shell portion, and FIG.
[0013]
A storage tank body 1 for storing corrosive liquids and gases includes a spherical shell 2, a plurality of pillars 3 for supporting the spherical shell 2, upper and lower manholes 4 and 4, and nozzles for liquid entry and exit. 5 and the like.
Reference numeral 6 denotes an air-tight, liquid-tight, and corrosion-resistant shell-like membrane covering the inner wall surface of the spherical shell 2. It is stuck to.
[0014]
The construction procedure of the membrane-lined spherical storage tank will be briefly described.
The storage tank main body 1 is assembled into a spherical shell shape using a carbon steel material or the like, and is integrally constructed by welding.
[0015]
Next, a film fixing material such as a plurality of bolts is attached to a required portion on the inner surface of the storage tank by stud welding or fillet welding.
[0016]
Subsequently, the nondestructive inspection, the pressure resistance, and the airtightness test of the storage tank main body 1 are completed, and the inner surface of the spherical shell is cleaned.
[0017]
Next, the shell-like membrane body 6 having flexibility is developed on site, and the opening of the shell-like membrane body 6 is inserted into the membrane body fixing material such as the bolt, and tightened and fixed with a nut. The shell-like membrane 6 is attached to the inner wall surface of the spherical shell 2.
In this case, since the film material having flexibility is used even if the shell-shaped film body 6 is wrinkled, when the spherical storage tank is operated, the shell-shaped film body 6 is adapted to the inner wall surface of the spherical shell due to the pressure inside the storage tank. Adhere with.
[0018]
In order to further improve the adhesion, as shown in FIG. 2, for example, a double-sided adhesive tape is used so that the inner wall surface of the spherical shell 2 and the shell-like film body 6 of the flexible film material can be held in close contact with each other. The adhesive member 7 is adhered to the entire inner surface of the spherical shell, and the shell-like film 6 is adhered thereon.
Then, while discharging air so that no air remains between the inner wall surface of the spherical shell and the shell-like film body 6, the shell-like film body 6 is pressed from above along the adhesive member 7 such as a double-sided adhesive tape, and the ball is pressed. Adhere to the inner wall of the shell. During operation of the spherical storage tank, since a high pressure is applied to the inside of the storage tank, the adhesive member 7 such as a double-sided adhesive tape or the shell-like film 6 does not peel off.
[0019]
This double-sided adhesive tape is, for example, a paper or cloth, or a synthetic resin material such as vinyl chloride, polyolefin, or polyethylene as a film base, and a synthetic rubber, an acrylic resin agent, or a high-performance bond or the like as an adhesive base. And a member that can be easily attached and detached is used.
[0020]
When it is desired to completely remove the air between the inner wall surface of the spherical shell and the shell-like film body 6, the film body fixing portions on the inner peripheral edge of the accessory part such as the upper and lower manholes 4, 4 and the nozzle 5 are sealed, and the upper and lower manholes 4 are sealed. , 4 are each provided with an air outlet (not shown), and the air between the inner wall surface of the spherical shell 2 and the shell-like membrane 6 is exhausted by a vacuum device or the like, and the shell-like membrane 6 is removed from the inner wall surface of the spherical shell. Adhere to.
[0021]
The shell-like film body 6 may be integrally molded in advance in a factory or the like, developed on site, and attached to the inner wall surface of the spherical shell body 2 at a time with an adhesive member 7 such as a double-sided adhesive tape, or A plurality of membrane pieces manufactured by dividing vertically from the central horizontal line and further dividing in the meridian direction, etc., are sequentially bonded to each other in a gas-tight and liquid-tight manner by means of heat welding or an adhesive at the site, and the spheres are sequentially formed. The inner wall surface of the shell 2 may be adhered to and adhered to an adhesive member 7 such as a double-sided adhesive tape.
[0022]
An embodiment of the mounting structure of the shell-shaped film body 6 and the embodiment of the film body fixing device 8 will be described in more detail with reference to FIG.
FIG. 3A is a longitudinal sectional view showing the film body fixing device 8 of FIG. 1, and FIG. 3B is a perspective explanatory view thereof.
[0023]
As shown in FIGS. 3 (a) and 3 (b), bolts 9 are erected at important points on the inner wall surface of the spherical shell 2 by stud welding or fillet welding. Then, a disc-shaped pressing member 10 is inserted over the upper part of the hole, and the upper part is covered with the disk-shaped pressing member 10.
[0024]
Then, a protective cap 12 made of a flexible material such as a synthetic resin is put on the bolt 9 and the nut 11.
[0025]
A bowl-like covering film 13 having a substantially hemispherical shell shape and made of the same material as the shell-like film body 6 is placed above the fixing portion, and the peripheral edge of the covering film 13 is thermally welded to the upper surface of the shell-like film body 6. And airtight and liquid tight with an adhesive.
[0026]
Note that an elastic member 14 made of a disc-shaped synthetic resin material or a synthetic rubber material is interposed below the holding member 10 so as to fit into the inner wall surface of the spherical shell 2.
[0027]
Then, at the time of the opening inspection, the covering film 13 of the film fixing device 8 is cut off, the screw member such as the nut 11 is removed, the shell-like film member 6 is peeled off, the adhesive member 7 such as a double-sided adhesive tape is removed, and the spherical shell is removed. Inspect the body.
[0028]
After completion of the open inspection, a new adhesive member 7 such as a double-sided adhesive tape and the used shell-like membrane 6 are attached again to the inner wall surface of the spherical shell by the above-mentioned method. To fix the spherical shell film body 6, and newly form the covering film 13, and fix it air-tight and liquid-tight by heat welding or an adhesive on site.
[0029]
In the case of a storage tank in which sludge, sediment and the like are generated, the sediment and the like are removed integrally with the shell-like film body 6.
[0030]
As described above, since the shell-like membrane 6 can be removed and removed together with the deposits and the like at the time of maintenance such as cleaning and inspection, cleaning is easy, and replacement of the shell-like membrane 6 is easy. The maintenance, inspection, and inspection can be performed economically with good workability.
Furthermore, pre-treatments such as cleaning of the inner wall surface of the spherical shell 2 and surface polishing performed for the inspection are simple work because the same state as at the time of construction is maintained, the repair range is small, and the construction period is shortened. Therefore, the cost for the inspection can be significantly reduced.
[0031]
If the sediment or the attached matter is severely adhered to the shell-shaped film body 6, the shell-shaped film body 6 is disposed of together with the sediment or the attached matter, and is manufactured at a factory when the storage tank is restored. The new shell-like film body 6 is attached. The new shell-like membrane 6 can be easily attached and covered by the same method as described above.
[0032]
As the film material used for the shell-like film body 2, a flexible sheet body having airtightness and liquid tightness for a long period of time, and having toughness, high corrosion resistance, chemical resistance, and durability is used.
This sheet body is made of, for example, a film material formed of a synthetic resin material such as a vinyl chloride resin, an olefin resin, an ethylene vinyl acetate resin, or a fiber such as a polyester fiber or a glass fiber. A sheet of a cloth material coated with a synthetic resin such as a vinyl resin, or a sheet of various fibers coated with a synthetic rubber is used.
[0033]
The shell-like membrane 6 is a lightweight flexible sheet member, which can be manufactured at low cost by welding or bonding, and can be covered and fixed with good workability and safety. Excellent lining structure.
Since this film member is located inside the storage tank and is not affected by the ultraviolet rays of the sun, a longer-term durability can be obtained as compared with a film structure installed outdoors.
[0034]
【The invention's effect】
As is apparent from the above description, the membrane-lined spherical storage tank according to the present invention has a spherical shell inner wall for storing a corrosive liquid or gas, and has a flexible shell having airtightness, liquid tightness and corrosion resistance. The inner wall surface of the storage tank body is shielded from corrosive substances in the contents by the film body, so that the inner wall surface of the storage tank body is not affected by corrosion. When the storage tank body shrinks due to the influence of the internal pressure fluctuation inside the storage tank or the outside air temperature without being affected by the storage tank body, the flexible film body having large expansion and contraction has a safe lining structure without being affected by the contraction.
In addition, the coating of the flexible film body does not have the adverse effect of heat or distortion on the storage tank body without giving welding heat influence to the storage tank body as in the conventional welding lining processing, and the internal pressure during operation is not affected. As a result, it is possible to maintain close contact with the inner wall surface of the spherical shell, so that it is functional and excellent in safety.
Further, since the flexible film body can be made of a lightweight member at low cost and can be constructed safely with good workability, the lining structure is excellent in economic efficiency.
In addition, the inspection of the storage tank body at the time of the open inspection, which was difficult with the lining structure of clad steel or stainless steel, is now possible by simply removing the shell-like membrane, and the safety and reliability of the storage tank are improved. In addition to securing the cost, the cost and construction period required for open inspection can be significantly reduced.
Pretreatment such as cleaning and surface polishing for inspection is also easy, the repair range is small, the construction period can be shortened, and the cost for inspection can be greatly reduced. In addition, the used shell-like membrane or a new shell-like membrane can be easily attached and covered.
Furthermore, at the time of maintenance such as cleaning and inspection, the shell-like membrane can be easily and easily removed and collectively removed together with deposits and deposits, so that cleaning is easy and replacement of the membrane material is easy. This makes it possible to economically perform cleaning and inspection with good workability.
[0035]
Further, since the flexible membrane is formed in close contact with the inner wall surface of the spherical shell of the spherical storage tank using a detachable adhesive member such as a double-sided adhesive tape, the space between the inner wall surface of the spherical shell and the shell-like membrane is formed. It can completely adhere to the inner surface of the spherical shell without making air pockets, and can be easily and easily constructed with good workability.
During operation of the storage tank, the pressure inside the storage tank can be maintained in close contact with the inner wall surface of the spherical shell, and at the time of removal during the open inspection, it is an adhesive member such as a removable double-sided adhesive tape. Because the flexible membrane and the double-sided adhesive tape can be easily and easily peeled off, the storage tank body can be inspected at the time of open inspection, the work period for inspection and maintenance is short, and the lining is excellent in economy. Structure.
[0036]
Further, the film body fixing device holding the flexible film body is covered with a bowl-shaped covering film body, and the periphery of the covering film body is formed on the upper surface of the flexible film body on the inner wall surface of the spherical shell. Since the film is fixed in an air-tight and / or liquid-tight manner, the film body fixing material is shielded from the contents, so that it does not suffer from corrosion or damage. Therefore, it is not necessary to use a corrosion-resistant material, and inexpensive carbon steel, etc. The material can be used, the durability is improved, and the contamination of the contents due to corrosion and damage does not occur.
Then, the work of coating and fixing can be easily and easily performed by heat welding or an adhesive, and can be easily and easily cut and removed when detached at the time of inspection or the like.
[0037]
[Brief description of the drawings]
FIG. 1 is an explanatory longitudinal sectional view showing an embodiment of a membrane-lined spherical storage tank according to the present invention.
FIG. 2 is an explanatory sectional view showing a spherical shell portion of FIG. 1;
3A is a vertical cross-sectional explanatory view of the vicinity of a film body fixing device, and FIG. 3B is a perspective explanatory view thereof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Storage tank main body 2 Spherical shell 3 Pillar 4 Manhole 5 Nozzle 6 Shell-like membrane 7 Adhesive member 8 Membrane fixture 9 Bolt 10 Pressing material 11 Nut 12 Cap 13 Covering film 14 Elastic material

Claims (3)

  1. 腐食性を有する液体や気体を貯蔵する球形貯槽の球殻内壁面を、気密性、液密性及び耐食性を有する可撓性膜体で被覆し、その複数箇所を膜体固定具で保持することを特徴とする膜ライニング球形貯槽。The inner wall surface of the spherical shell of a spherical storage tank that stores corrosive liquids and gases is covered with a flexible film having air-tightness, liquid-tightness, and corrosion resistance, and a plurality of locations are held by a film fixing device. A spherical storage tank characterized by a membrane lining.
  2. 上記可撓性膜体は、球形貯槽の球殻内壁面に、両面粘着テープ等の着脱可能な接着部材を用いて密着形成することを特徴とする請求項1記載の膜ライニング球形貯槽。2. The membrane lining spherical storage tank according to claim 1, wherein the flexible membrane is formed in close contact with the inner wall surface of the spherical shell of the spherical storage tank using a removable adhesive member such as a double-sided adhesive tape.
  3. 上記可撓性膜体を保持する膜体固定具は、おわん状の覆い膜体で被覆し、該覆い膜体の周縁を、上記球殻内壁面の可撓性膜体の上面に、気密及び又は液密に固着形成することを特徴とする請求項1又は2記載の膜ライニング球形貯槽。The film body fixing device holding the flexible film body is covered with a bowl-shaped covering film body, and the periphery of the covering film body is air-tight and airtight on the upper surface of the flexible film body on the inner wall surface of the spherical shell. 3. The membrane-lined spherical storage tank according to claim 1, wherein the storage tank is formed in a liquid-tight manner.
JP2002216125A 2002-07-25 2002-07-25 Membrane-lined spherical reservoir Pending JP2004059006A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008063591A (en) * 2006-09-04 2008-03-21 Osaka Gas Co Ltd Protective structure for metal structure
KR101068970B1 (en) 2010-02-10 2011-09-29 (주)한일케미텍 Guide Bracket for Chemical Storage Tank
KR101116788B1 (en) 2010-02-10 2012-02-28 (주)한일케미텍 The chemicals storage tank
CN106015919A (en) * 2016-07-13 2016-10-12 北京华福工程有限公司 High-pressure spherical gas tank
CN106516473A (en) * 2016-11-15 2017-03-22 常熟市屠宰成套设备厂有限公司 Film liquid tank for egg product film coating packing machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52148820A (en) * 1976-06-07 1977-12-10 Kawasaki Heavy Ind Ltd Pressure container and production thereof
JPH07217394A (en) * 1994-01-29 1995-08-15 Kanko Eng Kk Rock-bolt cap and use thereof
JPH0913592A (en) * 1995-06-30 1997-01-14 Aaki Yamade Kk Waterproof layer formation method
JPH10159500A (en) * 1996-11-28 1998-06-16 Kanegafuchi Chem Ind Co Ltd Rock bolt cover
JP2000302188A (en) * 1999-04-21 2000-10-31 Ishii Iron Works Co Ltd Tank with flexible diaphragm

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52148820A (en) * 1976-06-07 1977-12-10 Kawasaki Heavy Ind Ltd Pressure container and production thereof
JPH07217394A (en) * 1994-01-29 1995-08-15 Kanko Eng Kk Rock-bolt cap and use thereof
JPH0913592A (en) * 1995-06-30 1997-01-14 Aaki Yamade Kk Waterproof layer formation method
JPH10159500A (en) * 1996-11-28 1998-06-16 Kanegafuchi Chem Ind Co Ltd Rock bolt cover
JP2000302188A (en) * 1999-04-21 2000-10-31 Ishii Iron Works Co Ltd Tank with flexible diaphragm

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008063591A (en) * 2006-09-04 2008-03-21 Osaka Gas Co Ltd Protective structure for metal structure
KR101068970B1 (en) 2010-02-10 2011-09-29 (주)한일케미텍 Guide Bracket for Chemical Storage Tank
KR101116788B1 (en) 2010-02-10 2012-02-28 (주)한일케미텍 The chemicals storage tank
CN106015919A (en) * 2016-07-13 2016-10-12 北京华福工程有限公司 High-pressure spherical gas tank
CN106516473A (en) * 2016-11-15 2017-03-22 常熟市屠宰成套设备厂有限公司 Film liquid tank for egg product film coating packing machine

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