JP4866115B2 - Low temperature liquefied gas storage facility - Google Patents
Low temperature liquefied gas storage facility Download PDFInfo
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Description
本発明は、ドーム屋根の上面を形成している金属製屋根板と金属製筒状周壁とを一連一体に形成してある外槽の内側に、低温液化ガス貯留用の内槽を断熱材を介して収容し、前記外槽の外側部を全周に亘って取り囲むコンクリート製の筒状外壁を前記外槽と一体に立設すると共に、その筒状外壁の上端面を環状に覆う金属製覆い板を設けてある低温液化ガス貯留設備に関する。 The present invention provides a heat insulating material for an inner tank for storing a low-temperature liquefied gas inside an outer tank in which a metal roof plate forming a top surface of a dome roof and a metal cylindrical peripheral wall are integrally formed. A concrete cylindrical outer wall that surrounds the outer portion of the outer tub over the entire circumference, and is integrally provided with the outer tub, and the upper end surface of the cylindrical outer wall is annularly covered. The present invention relates to a low-temperature liquefied gas storage facility provided with a plate.
上記低温液化ガス貯留設備は、外槽の外側部を全周に亘って取り囲むコンクリート製の筒状外壁を外槽と一体に立設してあるので、外槽と筒状外壁との間に雨水や結露水が浸入して、外槽を構成している金属製の屋根板又は筒状周壁が腐食し易い問題がある(例えば、特許文献1参照)。
このため、外槽と筒状外壁との間への雨水や結露水の浸入を防止するために、従来、筒状外壁の上端面を環状に覆う金属製覆い板の端面と外槽との対向箇所を互いに一連に溶接接合する等の対策が考えられている。
In the low temperature liquefied gas storage facility, a concrete cylindrical outer wall that surrounds the outer part of the outer tank over the entire circumference is erected integrally with the outer tank, so that rainwater is placed between the outer tank and the cylindrical outer wall. In addition, there is a problem that the metal roof plate or the cylindrical peripheral wall constituting the outer tub is likely to corrode due to the intrusion of condensed water and water (for example, see Patent Document 1).
For this reason, in order to prevent intrusion of rainwater or condensed water between the outer tub and the cylindrical outer wall, conventionally, the end face of the metal cover plate that covers the upper end surface of the cylindrical outer wall in an annular shape is opposed to the outer tub. Measures such as welding the parts in series are considered.
しかしながら、通常、外槽は低温液化ガス貯留設備の設置現場で完成させるので、覆い板の筒径方向内方側端面の形状を、実際の外槽の外周形状に沿わせて設けることが難しくて、覆い板の端面と外槽との対向箇所に大きな隙間ができ易い。
このために、覆い板の筒径方向内方側端面の形状を、実際の外槽の外周形状に沿わせるための覆い板の製作・加工に非常に手間を要し、また、その隙間を溶接肉盛りで埋めるとしても、溶接作業に多大の手間と時間を要する欠点がある。
本発明は上記実情に鑑みてなされたものであって、外槽と筒状外壁との間への雨水や結露水の浸入を簡便、かつ、確実に防止できるようにすることを目的とする。
However, since the outer tank is usually completed at the installation site of the low-temperature liquefied gas storage facility, it is difficult to provide the shape of the inner side end face of the cover plate along the outer peripheral shape of the actual outer tank. A large gap is likely to be formed between the end face of the cover plate and the outer tub.
For this reason, it takes a lot of work to manufacture and process the cover plate to match the shape of the inner end surface in the cylinder radial direction of the cover plate to the actual outer peripheral shape of the outer tub, and the gap is welded. Even if it is filled with the overlay, there is a drawback that the welding work requires a lot of labor and time.
This invention is made | formed in view of the said situation, Comprising: It aims at making it possible to prevent the invasion of rain water and dew condensation water between an outer tank and a cylindrical outer wall simply and reliably.
本発明の第1特徴構成は、ドーム屋根の上面を形成している金属製屋根板と金属製筒状周壁とを一連一体に形成してある外槽の内側に、低温液化ガス貯留用の内槽を断熱材を介して収容し、前記外槽の外側部を全周に亘って取り囲むコンクリート製の筒状外壁を前記外槽と一体に立設すると共に、その筒状外壁の上端面を環状に覆う金属製覆い板を設けてある低温液化ガス貯留設備であって、
前記外槽における前記金属製屋根板の外面から前記覆い板の上面に亘り、金属製継ぎ板を筒径方向外方側ほど低くなる傾斜姿勢で環状に架け渡して、その筒径方向両端縁部の夫々を一連に溶接接合してあるとともに、
前記継ぎ板と前記覆い板との上下方向間において、前記外槽における前記金属製屋根板の外面と前記覆い板の上面とに亘って、金属製補助継ぎ板を筒径方向外方側ほど低くなる傾斜姿勢で環状に架け渡して、その筒径方向両端縁部の夫々を一連に溶接接合してある点にある。
The first characteristic configuration of the present invention is that a metal roof plate forming the upper surface of a dome roof and a metal cylindrical peripheral wall are formed in a single body in an inner tank for low-temperature liquefied gas storage. A concrete cylindrical outer wall that houses the tank through a heat insulating material and surrounds the outer part of the outer tank over the entire circumference is erected integrally with the outer tank, and the upper end surface of the cylindrical outer wall is annular A low-temperature liquefied gas storage facility provided with a metal cover plate covering
Over the outer surface of the metal roof plate before Kigaiso the upper surface of the cover plate, at low becomes inclined position a metal joint plate as the cylinder radially outward side bridging the annular, its cylinder radial end edges Each of the parts are welded together in series ,
Between the vertical direction of the joint plate and the cover plate, the metal auxiliary joint plate is lowered toward the outer side in the cylinder radial direction across the outer surface of the metal roof plate and the upper surface of the cover plate in the outer tub. It is in the point where it is bridged in an annular shape with a tilted attitude and the respective ends of both ends in the cylinder radial direction are welded together in series .
〔作用及び効果〕
外槽における金属製屋根板の外面から覆い板の上面に亘って金属製継ぎ板を環状に架け渡し、その継ぎ板の筒径方向両端縁部の夫々を、外槽における金属製屋根板の外面と覆い板の上面に一連に溶接接合してあるので、覆い板の端面と外槽との対向箇所に大きな隙間ができても、覆い板の筒径方向内方側端面の形状を、実際の外槽の外周形状に沿わせるための覆い板の製作・加工を行ったり、その隙間を溶接肉盛りで埋めるようなことなく、外槽における金属製屋根板の外面と覆い板の上面に一連に溶接接合してある環状の継ぎ板で、外槽と筒状外壁との間への雨水や結露水の浸入を確実に防止できる。
また、継ぎ板を筒径方向外方側ほど低くなる傾斜姿勢で環状に架け渡してあるので、雨水や結露水を継ぎ板の上面に沿って覆い板の外周側に向けて流下させ易い。
従って、外槽と筒状外壁との間への雨水や結露水の浸入を簡便、かつ、確実に防止できる。
[Action and effect]
A metal joint plate is looped from the outer surface of the metal roof plate in the outer tub to the upper surface of the cover plate , and each of the both end edges in the cylinder radial direction of the joint plate is connected to the outer surface of the metal roof plate in the outer tub . Since the weld plate is welded in series to the top surface of the cover plate, the shape of the end surface on the inner side in the cylinder radial direction of the cover plate can be changed even if there is a large gap between the end surface of the cover plate and the outer tub. Without having to manufacture and process a cover plate to fit the outer shape of the outer tub, and fill the gap with weld overlay, a series of metal plates on the outer surface of the outer tub and the upper surface of the cover plate An annular joint plate that is welded and joined can reliably prevent intrusion of rainwater or dew condensation water between the outer tub and the cylindrical outer wall.
In addition, since the joint plate is looped over in an inclined posture that becomes lower toward the outer side in the cylinder radial direction, it is easy to allow rainwater and dew condensation water to flow down toward the outer peripheral side of the cover plate along the upper surface of the joint plate.
Accordingly, it is possible to easily and reliably prevent rainwater and condensed water from entering between the outer tank and the cylindrical outer wall.
さらに、継ぎ板と覆い板との上下方向間において、外槽における金属製屋根板の外面と覆い板の上面とに亘って、金属製補助継ぎ板を環状に架け渡して、その筒径方向両端縁部の夫々を、外槽における金属製屋根板の外面と覆い板の上面に一連に溶接接合してあるので、仮に、継ぎ板と外槽との溶接箇所や継ぎ板と覆い板との溶接箇所にクラックなどが発生して、継ぎ板の内側に雨水や結露水が流入しても、その流入水の外槽と筒状外壁との間への浸入を、補助継ぎ板で確実に防止できる。
また、補助継ぎ板を筒径方向外方側ほど低くなる傾斜姿勢で環状に架け渡してあるので、流入水を補助継ぎ板の上面に沿って覆い板の外周側に向けて流下させ易い。
Further, between the joint plate and the cover plate in the vertical direction , the metal auxiliary joint plate is looped over the outer surface of the metal roof plate in the outer tub and the upper surface of the cover plate , and both ends in the cylinder radial direction Since each edge is welded and joined in series to the outer surface of the metal roof plate and the upper surface of the cover plate in the outer tub, it is assumed that the welded portion between the joint plate and the outer tub or the weld between the joint plate and the cover plate Even if a crack or the like occurs in the location and rainwater or condensed water flows inside the joint plate, the inflow of the inflow water between the outer tank and the cylindrical outer wall can be reliably prevented with the auxiliary joint plate. .
Moreover, since the auxiliary joint plate is looped over in an annular shape so as to become lower toward the outer side in the cylinder radial direction, the inflowing water can easily flow down toward the outer peripheral side of the cover plate along the upper surface of the auxiliary joint plate.
本発明の第2特徴構成は、ドーム屋根の上面を形成している金属製屋根板と金属製筒状周壁とを一連一体に形成してある外槽の内側に、低温液化ガス貯留用の内槽を断熱材を介して収容し、前記外槽の外側部を全周に亘って取り囲むコンクリート製の筒状外壁を前記外槽と一体に立設すると共に、その筒状外壁の上端面を環状に覆う金属製覆い板を設けてある低温液化ガス貯留設備であって、
前記外槽における前記金属製屋根板の外面から前記覆い板の上面に亘り、金属製継ぎ板を筒径方向外方側ほど低くなる傾斜姿勢で環状に架け渡して、その筒径方向両端縁部の夫々を一連に溶接接合してあるとともに、
金属製補助継ぎ板を、筒径方向外方側ほど低くなる傾斜姿勢で、前記継ぎ板と前記覆い板との上下方向間に環状に入り込ませて、その筒径方向内方側端縁部を前記外槽に一連に溶接接合するとともに、筒径方向外方側端縁部を前記覆い板に対して相対変位自在に設けてある点にある。
The second feature of the present invention is that the inner wall for storing the low-temperature liquefied gas is disposed inside the outer tub in which the metal roof plate forming the upper surface of the dome roof and the metal cylindrical peripheral wall are integrally formed. A concrete cylindrical outer wall that houses the tank through a heat insulating material and surrounds the outer part of the outer tank over the entire circumference is erected integrally with the outer tank, and the upper end surface of the cylindrical outer wall is annular A low-temperature liquefied gas storage facility provided with a metal cover plate covering
In the outer tub, spanning from the outer surface of the metal roof plate to the upper surface of the cover plate, the metal joint plate is looped over in an inclined posture that becomes lower toward the outer side in the tube radial direction, and both end portions in the tube radial direction Are welded together in series,
The metal auxiliary joint plate is inserted into an annular space between the vertical direction of the joint plate and the cover plate in an inclined posture that becomes lower toward the outer side in the tube radial direction, and the inner edge in the tube radial direction is formed. While being welded and joined in series to the outer tub, a cylindrical radial outer edge is provided so as to be relatively displaceable with respect to the cover plate .
〔作用及び効果〕
外槽における金属製屋根板の外面から覆い板の上面に亘って金属製継ぎ板を環状に架け渡し、その継ぎ板の筒径方向両端縁部の夫々を、外槽における金属製屋根板の外面と覆い板の上面に一連に溶接接合してあるので、覆い板の端面と外槽との対向箇所に大きな隙間ができても、覆い板の筒径方向内方側端面の形状を、実際の外槽の外周形状に沿わせるための覆い板の製作・加工を行ったり、その隙間を溶接肉盛りで埋めるようなことなく、外槽における金属製屋根板の外面と覆い板の上面に一連に溶接接合してある環状の継ぎ板で、外槽と筒状外壁との間への雨水や結露水の浸入を確実に防止できる。
また、継ぎ板を筒径方向外方側ほど低くなる傾斜姿勢で環状に架け渡してあるので、雨水や結露水を継ぎ板の上面に沿って覆い板の外周側に向けて流下させ易い。
従って、外槽と筒状外壁との間への雨水や結露水の浸入を簡便、かつ、確実に防止できる。
金属製補助継ぎ板を、筒径方向外方側ほど低くなる傾斜姿勢で、継ぎ板と覆い板との上下方向間に環状に入り込ませて、その筒径方向内方側端縁部を外槽に一連に溶接接合してあるので、仮に、継ぎ板と外槽との溶接箇所にクラックなどが発生して、継ぎ板の内側に雨水や結露水が流入しても、その流入水を補助継ぎ板の上面に沿って覆い板の外周側に向けて流下させ易く、流入水が外槽と筒状外壁との間に浸入しにくい。
また、補助継ぎ板の筒径方向外方側端縁部を覆い板に対して相対変位自在に設けてあるので、外槽と筒状外壁とが熱膨張率の違いなどに起因して相対変位しようとしても、補助継ぎ板の外槽との溶接箇所に熱応力などが作用しにくく、クラックなどが発生しにくい。
[Action and effect]
A metal joint plate is looped from the outer surface of the metal roof plate in the outer tub to the upper surface of the cover plate, and each of the both end edges in the cylinder radial direction of the joint plate is connected to the outer surface of the metal roof plate in the outer tub. Since the weld plate is welded in series to the top surface of the cover plate, the shape of the end surface on the inner side in the cylinder radial direction of the cover plate can be changed even if there is a large gap between the end surface of the cover plate and the outer tub. Without having to manufacture and process a cover plate to fit the outer shape of the outer tub, and fill the gap with weld overlay, a series of metal plates on the outer surface of the outer tub and the upper surface of the cover plate An annular joint plate that is welded and joined can reliably prevent intrusion of rainwater or dew condensation water between the outer tub and the cylindrical outer wall.
In addition, since the joint plate is looped over in an inclined posture that becomes lower toward the outer side in the cylinder radial direction, it is easy to allow rainwater and dew condensation water to flow down toward the outer peripheral side of the cover plate along the upper surface of the joint plate.
Accordingly, it is possible to easily and reliably prevent rainwater and condensed water from entering between the outer tank and the cylindrical outer wall.
Insert the metallic auxiliary joint plate into an annular space between the vertical direction of the joint plate and the cover plate in an inclined posture that becomes lower toward the outer side in the cylinder radial direction, and the inner edge of the cylindrical radial direction is the outer tank. As a result, even if a crack or the like occurs at the welded part between the joint plate and the outer tub and rainwater or dew condensation flows into the joint plate, the inflow water is used as an auxiliary joint. It is easy to make it flow down toward the outer peripheral side of a cover board along the upper surface of a board, and an inflow water does not enter easily between an outer tank and a cylindrical outer wall.
In addition, the outer edge of the auxiliary joint plate in the radial direction of the cylinder is provided so as to be relatively displaceable with respect to the cover plate. Even when trying to do so, thermal stress or the like hardly acts on the welded portion of the auxiliary joint plate with the outer tub, and cracks and the like hardly occur.
本発明の第3特徴構成は、前記覆い板の筒径方向内方側端部を筒周方向に沿って上向きに一連に屈曲させてある点にある。 The third characteristic configuration of the present invention resides in that a cylindrical radial inner side end portion of the cover plate is continuously bent upward along the cylindrical circumferential direction.
〔作用及び効果〕
覆い板の筒径方向内方側端部を筒周方向に沿って上向きに一連に屈曲させてあるので、仮に、継ぎ板や補助継ぎ板の下側で覆い板の上に水が溜まるようなことがあっても、その水の筒径方向内方側への流動に抵抗を与えることができ、外槽と筒状外壁との間に水が浸入しにくい。
[Action and effect]
The inner end of the cover plate in the cylinder radial direction is continuously bent upward along the cylinder circumferential direction, so that water may accumulate on the cover plate under the joint plate or the auxiliary joint plate. Even if this occurs, resistance can be given to the flow of the water inward in the cylinder radial direction, and water hardly enters between the outer tank and the cylindrical outer wall.
本発明の第4特徴構成は、前記外槽と前記覆い板の端面との対向箇所に、樹脂コーキング材を充填してある点にある。 The 4th characteristic structure of this invention exists in the point which filled the resin caulking material in the opposing location of the said outer tank and the end surface of the said cover board.
〔作用及び効果〕
外槽と覆い板の端面との対向箇所に、樹脂コーキング材を充填してあるので、仮に、継ぎ板と外槽との溶接箇所や継ぎ板と覆い板との溶接箇所にクラックなどが発生して、継ぎ板の内側に雨水や結露水が流入しても、その流入水の外槽と筒状外壁との間への浸入を、樹脂コーキング材で確実に防止できる。
[Action and effect]
Since the resin caulking material is filled in the location where the outer tub and the end face of the cover plate face each other, cracks etc. may occur at the weld location between the joint plate and the outer tub or between the joint plate and the cover plate. Thus, even if rainwater or condensed water flows into the inside of the joint plate, the intrusion of the inflow water between the outer tank and the cylindrical outer wall can be reliably prevented with the resin caulking material.
以下に本発明の実施の形態を図面に基づいて説明する。
〔第1実施形態〕
図1,図2は本発明による低温液化ガス(本実施形態では液化天然ガス)LNGの貯留設備を示し、鋼管杭1で補強してある地盤に基礎スラブ2を略円形に設けて、その基礎スラブ2の上に鋼製の外槽3を設置し、外槽3の内側に、液化天然ガス貯留用の内槽4をグラスウールや粒状パーライトなどの断熱材5を介して収容するとともに、外槽3の外側部を全周に亘って取り囲むプレストレスコンクリート製の防液用円筒状外壁6を基礎スラブ2と外槽3とに一体に立設し、円筒状外壁6の上端面を環状に覆う鋼製覆い板7を設けてある。
Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
1 and 2 show a storage facility for low-temperature liquefied gas (liquefied natural gas in the present embodiment) LNG according to the present invention. A foundation slab 2 is provided in a substantially circular shape on a ground reinforced by a steel pipe pile 1, and its foundation is shown. A steel
前記外槽3は、ドーム屋根8の上面を形成している鋼製の屋根板9と鋼製の円筒状外槽側部ライナ(円筒状周壁)10と外槽底部ライナ11とを溶接などで一連一体に形成して構成してあり、外槽底部ライナ11を挟んで底部保冷層12を略円形に設置してある。
The
そして、図3に示すように、屋根板9の外面から覆い板7の上面に亘り、鋼製継ぎ板13を筒径方向外方側ほど低くなる傾斜姿勢で一連の環状に架け渡して、その筒径方向両端縁部14,15の夫々を屋根板9の外面と覆い板7の上面とに、全周に亘って一連の連続溶接で接合してある。
Then, as shown in FIG. 3, the
また、継ぎ板13と覆い板7との間に、屋根板9の外面と覆い板7の上面とに亘って、鋼製補助継ぎ板16を筒径方向外方側ほど低くなる傾斜姿勢で一連の環状に架け渡して、その筒径方向両端縁部17,18の夫々を屋根板9の外面と覆い板7の上面とに、全周に亘って一連の連続溶接で接合してある
Further, between the
前記外槽側部ライナ10の頂部は、一方のフランジ22を水平方向に沿わせて筒径方向内方側に向け、且つ、他方のフランジ23を鉛直方向に沿わせて、円筒状鋼板部25の上端部に全周に亘って一連の環状に連続溶接してある一連の頂部山形鋼24で構成してあり、屋根板9を水平フランジ22の端縁に全周に亘って一連の連続溶接で接合してある。
The top of the outer
そして、外槽3の筒状外壁6に対向する外周面、つまり、頂部山形鋼24における鉛直フランジ23の外周面に、一連の鋼(金属の一例)製環状帯板材26を、筒状外壁6側に向けて鍔状に突出し、かつ、筒径方向外方側ほど高くなる傾斜姿勢で、全周に亘って一連の連続溶接で固定して、筒状外壁6を形成しているコンクリートに埋設してある。
Then, a series of steel (an example of metal)
尚、筒状外壁6は、外槽側部ライナ10の周りに形成する側部コンクリート層27と、頂部山形鋼24の上部を覆う上部コンクリート層28とに分けて、側部コンクリート層27を打設して環状帯板材26を埋設した後、上部コンクリート層28を打設して設けてある。
The cylindrical
〔第2実施形態〕
図4は本発明による低温液化ガス貯留設備の別実施形態を示し、補助継ぎ板16を、筒径方向外方側ほど低くなる傾斜姿勢で、継ぎ板13と覆い板7との間に一連の環状に入り込ませて、その筒径方向内方側端縁部17を屋根板9の外面に、全周に亘って一連の連続溶接で接合するとともに、筒径方向外方側端縁部18と覆い板7との間に隙間を設けて、端縁部18を覆い板7に対して相対変位自在に設け、覆い板7の筒径方向内方側端部19を筒周方向に沿って上向きに一連に屈曲させてある。
その他の構成は第1実施形態と同様である。
[Second Embodiment]
FIG. 4 shows another embodiment of the low-temperature liquefied gas storage facility according to the present invention. The auxiliary
Other configurations are the same as those of the first embodiment.
〔第3実施形態〕
図5は本発明による低温液化ガス貯留設備の別実施形態を示し、屋根板9の外面と覆い板7の端面20との対向箇所に、樹脂コーキング材21を一連の環状に充填してある。
その他の構成は第1実施形態と同様である。
[Third Embodiment]
FIG. 5 shows another embodiment of the low-temperature liquefied gas storage facility according to the present invention, in which the
Other configurations are the same as those of the first embodiment.
〔その他の実施形態〕
1.本発明による低温液化ガス貯留設備は、液体酸素や液体水素,液化プロパンガスなどの低温液化ガスの貯留設備であっても良い。
2.本発明による低温液化ガス貯留設備は、第1実施形態で示した覆い板7の筒径方向内方側端部19を、筒周方向に沿って上向きに一連に屈曲させてあっても良い。
[Other Embodiments]
1. The low-temperature liquefied gas storage facility according to the present invention may be a low-temperature liquefied gas storage facility such as liquid oxygen, liquid hydrogen, or liquefied propane gas.
2. In the low-temperature liquefied gas storage facility according to the present invention, the
3 外槽
4 内槽
5 断熱材
6 筒状外壁
7 覆い板
8 ドーム屋根
9 屋根板
10 筒状周壁
13 継ぎ板
14 端縁部
15 端縁部
16 補助継ぎ板
17 端縁部
18 端縁部
21 樹脂コーキング材
26 環状帯板材
DESCRIPTION OF
Claims (4)
前記外槽における前記金属製屋根板の外面から前記覆い板の上面に亘り、金属製継ぎ板を筒径方向外方側ほど低くなる傾斜姿勢で環状に架け渡して、その筒径方向両端縁部の夫々を一連に溶接接合してあるとともに、
前記継ぎ板と前記覆い板との上下方向間において、前記外槽における前記金属製屋根板の外面と前記覆い板の上面とに亘って、金属製補助継ぎ板を筒径方向外方側ほど低くなる傾斜姿勢で環状に架け渡して、その筒径方向両端縁部の夫々を一連に溶接接合してある低温液化ガス貯留設備。 An inner tank for storing low-temperature liquefied gas is accommodated via a heat insulating material inside an outer tank in which a metal roof plate forming the upper surface of the dome roof and a metal cylindrical peripheral wall are integrally formed. A concrete cylindrical outer wall that surrounds the outer portion of the outer tub over the entire circumference is integrally provided with the outer tub, and a metal cover plate is provided that covers the upper end surface of the cylindrical outer wall in an annular shape. A low-temperature liquefied gas storage facility,
In the outer tub, spanning from the outer surface of the metal roof plate to the upper surface of the cover plate, the metal joint plate is looped over in an inclined posture that becomes lower toward the outer side in the tube radial direction, and both end portions in the tube radial direction Are welded together in series ,
Between the vertical direction of the joint plate and the cover plate, the metal auxiliary joint plate is lowered toward the outer side in the cylinder radial direction across the outer surface of the metal roof plate and the upper surface of the cover plate in the outer tub. A low-temperature liquefied gas storage facility in which the two end edges in the cylindrical radial direction are welded and joined in series in an annular shape with an inclined posture .
前記外槽における前記金属製屋根板の外面から前記覆い板の上面に亘り、金属製継ぎ板を筒径方向外方側ほど低くなる傾斜姿勢で環状に架け渡して、その筒径方向両端縁部の夫々を一連に溶接接合してあるとともに、
金属製補助継ぎ板を、筒径方向外方側ほど低くなる傾斜姿勢で、前記継ぎ板と前記覆い板との上下方向間に環状に入り込ませて、その筒径方向内方側端縁部を前記外槽に一連に溶接接合するとともに、筒径方向外方側端縁部を前記覆い板に対して相対変位自在に設けてある低温液化ガス貯留設備。 An inner tank for storing low-temperature liquefied gas is accommodated via a heat insulating material inside an outer tank in which a metal roof plate forming the upper surface of the dome roof and a metal cylindrical peripheral wall are integrally formed. A concrete cylindrical outer wall that surrounds the outer portion of the outer tub over the entire circumference is integrally provided with the outer tub, and a metal cover plate is provided that covers the upper end surface of the cylindrical outer wall in an annular shape. A low-temperature liquefied gas storage facility,
In the outer tub, spanning from the outer surface of the metal roof plate to the upper surface of the cover plate, the metal joint plate is looped over in an inclined posture that becomes lower toward the outer side in the tube radial direction, and both end portions in the tube radial direction Are welded together in series,
The metal auxiliary joint plate is inserted into an annular space between the vertical direction of the joint plate and the cover plate in an inclined posture that becomes lower toward the outer side in the tube radial direction, and the inner edge in the tube radial direction is formed. A low-temperature liquefied gas storage facility that is welded and joined in series to the outer tub, and an outer edge on the outer side in the cylinder radial direction is provided so as to be relatively displaceable with respect to the cover plate .
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JP2015067301A (en) * | 2013-09-30 | 2015-04-13 | 関西保温工業株式会社 | Construction method for thermal insulation of tank |
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