JP5354517B2 - Outer tank mounting structure for vertical double-shell cylindrical cryogenic storage tank - Google Patents
Outer tank mounting structure for vertical double-shell cylindrical cryogenic storage tank Download PDFInfo
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- JP5354517B2 JP5354517B2 JP2008222585A JP2008222585A JP5354517B2 JP 5354517 B2 JP5354517 B2 JP 5354517B2 JP 2008222585 A JP2008222585 A JP 2008222585A JP 2008222585 A JP2008222585 A JP 2008222585A JP 5354517 B2 JP5354517 B2 JP 5354517B2
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- 238000009413 insulation Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 description 8
- 239000011810 insulating material Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 101150114468 TUB1 gene Proteins 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000005315 distribution function Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- WWYNJERNGUHSAO-XUDSTZEESA-N (+)-Norgestrel Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](CC)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 WWYNJERNGUHSAO-XUDSTZEESA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
この発明は、液体窒素、液体酸素、ＬＮＧ等の低温液化ガスなどを貯蔵する縦置二重殻円筒形低温貯槽の外槽取付構造に関するものである。 The present invention relates to an outer tank mounting structure for a vertical double-shell cylindrical low-temperature storage tank that stores low-temperature liquefied gas such as liquid nitrogen, liquid oxygen, and LNG.
従来の縦置二重殻円筒形低温貯槽について、特許文献１、特許文献２、特許文献３に基づいて説明する。 A conventional vertical double-shell cylindrical low-temperature storage tank will be described based on Patent Literature 1, Patent Literature 2, and Patent Literature 3.
従来例１の本出願人に係る「低温二重殻貯槽の保冷構造」特開平２０００−２４００号公報（特許文献１参照）の発明を、図７に例示して説明する。
この特許文献１の「低温二重殻貯槽の保冷構造」は、従来例の図７に示すように、内槽２に接続し外槽３を貫通して地上に設置されているサポート７について、このサポート７が貫通する箇所の外槽内側に、内外槽間の断熱材４に比べて熱伝導性の大きい保冷材６を充填したものである。
The invention of “Cold Insulation Structure of Low Temperature Double Shell Storage Tank”, Japanese Patent Laid-Open No. 2000-2400 (see Patent Document 1) according to the present applicant of Conventional Example 1 will be described with reference to FIG.
As shown in FIG. 7 of the conventional example, the “cold insulation structure of the low-temperature double-shell storage tank” of Patent Document 1 is connected to the inner tank 2 and penetrates the outer tank 3 to be installed on the ground. The inside of the outer tub where the support 7 penetrates is filled with a cold insulating material 6 having higher thermal conductivity than the heat insulating material 4 between the inner and outer tubs.
従来例２の本特許出願人に係る「縦置二重殻円筒形低温貯槽」特開２００４−２１１７５９号公報（特許文献２参照）の発明を、図８に例示して説明する。
この特許文献２「縦置二重殻円筒形低温貯槽」の発明は、従来例の図８に示すように、外槽の底板１２は水平にスカート４に接続し、この位置から水平延長に補強リングプレート１９を設け、スカート４に接続した脇板１１に掛け渡して接続して断面三角形状の閉塞空間１８を形成したものである。
The invention of “vertical double-shell cylindrical low-temperature storage tank” disclosed in Japanese Patent Application Laid-Open No. 2004-211759 (refer to Patent Document 2) according to the present applicant of Conventional Example 2 will be described with reference to FIG.
In the invention of this patent document 2 “vertical double-shell cylindrical cryogenic storage tank”, as shown in FIG. 8 of the conventional example, the bottom plate 12 of the outer tank is connected horizontally to the skirt 4 and reinforced from this position to the horizontal extension. A ring plate 19 is provided, and is connected to the side plate 11 connected to the skirt 4 to form a closed space 18 having a triangular cross section.
また、従来例３の「竪型断熱低温タンクの外槽底板構造」特開平２００７−１６２７７２号（特許文献３参照）の発明について、図９に例示して説明する。
この特許文献３「竪型断熱低温タンクの外槽底板構造」の発明においては、従来例の図９に示すように、底板５２はリング部５６１と傾斜フランジ部５６２とからなる補強リング部材５６で支持スカート３に取り付け、その外側近傍位置の支持スカート３に逆円錐状のコーン板５５を取付けたものである。
Further, the invention of the conventional example 3 “outer tank bottom plate structure of vertical insulated low temperature tank”, Japanese Patent Laid-Open No. 2007-162772 (see Patent Document 3) will be described with reference to FIG.
In the invention of Patent Document 3 “Outer tank bottom plate structure of vertical heat insulating low temperature tank”, as shown in FIG. 9 of the conventional example, the bottom plate 52 is a reinforcing ring member 56 comprising a ring portion 561 and an inclined flange portion 562. It is attached to the support skirt 3 and an inverted conical cone plate 55 is attached to the support skirt 3 near the outside.
上記従来例１乃至従来例３の縦置二重殻円筒形低温貯槽、竪型断熱低温タンクはいずれも、外槽の底板及び傾斜板のスカート接続位置が近接しているため、内槽からスカートの下方へ伝わる冷熱が、この至近のスカート取付部から外槽の底板及び傾斜板へ伝わりやすい接続構造となっている。 Since the vertical double-shell cylindrical low-temperature storage tank and vertical heat insulation low-temperature tank of Conventional Examples 1 to 3 are both close to the skirt connecting positions of the bottom plate and the inclined plate of the outer tank, The cooling heat transmitted downward is easily connected to the bottom plate and the inclined plate of the outer tub from the nearest skirt mounting portion.
本特許出願人に係る特許文献１「低温二重殻貯槽の保冷構造」の図７に例示した発明は、内槽２と外槽３を貫通するサポート７が貫通する箇所の外槽内側に、内外槽間の断熱材４に比べて熱伝導性の大きい保冷材６を充填しているので、この保冷材６近傍の接続部の鋼材には、冷熱と温熱の熱変動負荷がかかりやすい構造であった。 The invention illustrated in FIG. 7 of Patent Document 1 “Cold Insulation Structure of Low Temperature Double Shell Storage Tank” related to the present patent applicant is located inside the outer tank at a location where the support 7 penetrating the inner tank 2 and the outer tank 3 penetrates. Since the heat insulating material 6 having higher thermal conductivity than that of the heat insulating material 4 between the inner and outer tanks is filled, the steel material in the connection portion in the vicinity of the cold insulating material 6 has a structure in which a heat fluctuation load of cold and hot heat is easily applied. there were.
本特許出願人に係る特許文献２「縦置二重殻円筒形低温貯槽」の図８に例示した発明は、外槽の底板１２が水平にスカート４に接続し、この位置から水平延長に補強リングプレート１９を設け、スカート４に接続した脇板１１に掛け渡し接続して断面三角形状の閉塞空間１８を形成しているので、スカート４への接続箇所が局部的に集中し施工が煩雑な構造であって、製作にあたって接続手順等も複雑であった。 In the invention illustrated in FIG. 8 of Patent Document 2 “Vertical Double-shell Cylindrical Low Temperature Storage Tank” of the present applicant, the bottom plate 12 of the outer tank is connected to the skirt 4 horizontally, and the horizontal extension is reinforced from this position. Since the ring plate 19 is provided and connected to the side plate 11 connected to the skirt 4 to form the closed space 18 having a triangular cross section, the connection points to the skirt 4 are concentrated locally and the construction is complicated. The structure was complicated and the connection procedure was complicated.
また、特許文献３「竪型断熱低温タンクの外槽底板構造」の発明においても、図９に例示されている構造は、底板５２はリング部５６１と傾斜フランジ部５６２とからなる補強リング部材５６で支持スカート３に取り付け、その外側近傍位置の支持スカート３に逆円錐状のコーン板５５を取付ける接続部密集の構造となっているので、冷熱が伝わりやすい上に、接続部密集の局部的集中構造であるため、場所によっては急激な温度変化、つまり冷熱と温熱とによって生じる大きな熱変動負荷の心配が考えられた。 Also, in the invention of Patent Document 3 “Outer tank bottom plate structure of vertical heat insulating low temperature tank”, the structure illustrated in FIG. 9 is that the bottom plate 52 is a reinforcing ring member 56 including a ring portion 561 and an inclined flange portion 562. Is attached to the support skirt 3 and the inverted conical cone plate 55 is attached to the support skirt 3 in the vicinity of the outside of the support skirt 3 so that the cold heat is easily transmitted and the connection portion is concentrated locally. Because of its structure, it was thought that depending on the location, there might be a sudden temperature change, that is, the fear of a large heat fluctuation load caused by cold and hot.
この発明の目的は、上述のような従来技術が有する問題点に鑑みてなされたもので、内外槽を支持するスカートへ接続固定する外槽の底板と外槽の胴板下部の傾斜板をずらせ、或いは放熱構造にて接続固定することによって、スカート接続部への荷重が一点に集中するのを防止し、かつ伝熱部の局部集中を解消して、機械的性能及び伝熱的安定性を向上させた縦置二重殻円筒形低温貯槽の外槽取付構造を提供するものである。 The object of the present invention has been made in view of the above-mentioned problems of the prior art. The bottom plate of the outer tub that is connected and fixed to the skirt that supports the inner and outer tubs and the inclined plate at the bottom of the shell plate of the outer tub are shifted. Alternatively, by connecting and fixing with a heat dissipation structure, it is possible to prevent the load on the skirt connection from concentrating on one point, and to eliminate local concentration of the heat transfer part, thereby improving mechanical performance and heat transfer stability. It is an object of the present invention to provide an improved outer tank mounting structure for an improved vertical double-shell cylindrical cryogenic storage tank.
請求項１の発明に係る縦置二重殻円筒形低温貯槽の外槽取付構造は、内槽と、保冷層を介して該内槽を囲繞する外槽とを設け、該外槽の底板端部を貫通して上記内槽に至る円筒形状のスカートで上記内槽及び外槽を基礎上に支持した縦置二重殻円筒形低温貯槽において、上記外槽の外槽底板は、スカートに接続固定したリング状の底板接続部材に取付けた梁部材の上に設置し、上記外槽の胴板下部のリング状の胴板接続部材の上記スカートへの各接続箇所となる取付部は、上下に荷重と伝熱の集中化を排除するための間隔をもたせ位置をずらして上記スカートへ接続固定し、かつ、上記外槽底板は、リング状の上下板と該上下板の間に設けたリブ板とからなる底板接続部材を上記スカートに接続固定し、該底板接続部材に底板支持材を取付けて、この底板支持材の上に設けたものである。
An outer tank mounting structure for a vertical double-shell cylindrical low-temperature storage tank according to the invention of claim 1 is provided with an inner tank and an outer tank surrounding the inner tank via a cold insulation layer, and the bottom plate end of the outer tank In the vertical double-shell cylindrical low-temperature storage tank that supports the inner and outer tanks on the foundation with a cylindrical skirt that penetrates the section and reaches the inner tank, the outer tank bottom plate of the outer tank is connected to the skirt was placed on the fixed ring-shaped bottom plate connecting member to the mounting a beam member attachment portion serving as the connection point to the skirt of the shell plate bottom of the ring-shaped body panel connecting members of the outer tank, the top and bottom by shifting the position remembering interval to eliminate centralized load and heat transfer fixedly connected to said skirt, and the outer tub bottom plate, and a rib plate provided in a ring-shaped upper and lower plate and upper and lower plates Connect and fix the bottom plate connecting member to the skirt, and attach the bottom plate support to the bottom plate connecting member. But on the top of the bottom plate support.
請求項１の発明に係る縦置二重殻円筒形低温貯槽の外槽取付構造は、内槽と、保冷層を介して該内槽を囲繞する外槽とを設け、該外槽の底板端部を貫通して上記内槽に至る円筒形状のスカートで上記内槽及び外槽を基礎上に支持した縦置二重殻円筒形低温貯槽において、上記外槽の外槽底板は、スカートに固定したリング状の底板接続部材に取付けた梁部材の上に設置し、外槽の胴板下部のリング状の胴板接続部材の上記スカートへの各接続箇所となる取付部は、上下に荷重と伝熱の集中化を排除するための間隔をもたせ位置をずらして上記スカートへ接続固定したので、スカートの内と外の一致した箇所に溶接接続による接続箇所が一致しないため、接続作業の施工性が良く、荷重集中の分散がなされ強度が向上し、また冷熱の局部的な集中が解消され熱変動負荷による荷重も軽減されて、冷熱を内外へ分散し放熱機能的に優れ、かつ接続箇所の低温劣化を防止することができる。さらに、結露や霜の発生を防止することができる。
An outer tank mounting structure for a vertical double-shell cylindrical low-temperature storage tank according to the invention of claim 1 is provided with an inner tank and an outer tank surrounding the inner tank via a cold insulation layer, and the bottom plate end of the outer tank In a vertical double-shell cylindrical low-temperature storage tank that supports the inner and outer tanks on the foundation with a cylindrical skirt that penetrates the section and reaches the inner tank, the outer tank bottom plate of the outer tank is fixed to the skirt mounting portion was placed on a ring-shaped bottom plate connecting member to the mounting a beam member, and the connection into the skirt of the shell plate bottom of the ring-shaped body panel connecting members of the outer tank, a load up and down since shifting the position remembering interval to eliminate centralized heat transfer fixedly connected to said skirt, since the connection portions by welding connect the matched portions of the inner and outer skirt do not match, workability of connection work good, and it improves the dispersibility is performed strength of load concentration, also cold localized current There is also eliminated load due to thermal fluctuation load is reduced, cold dispersion into and out dissipated functionally superior, and it is possible to prevent the low temperature degradation of the connection points. Furthermore, the occurrence of condensation and frost can be prevented.
また、請求項１の発明に係る縦置二重殻円筒形低温貯槽の外槽取付構造は、内槽と、保冷層を介して該内槽を囲繞する外槽とを設け、該外槽の底板端部を貫通して上記内槽に至る円筒形状のスカートで上記内槽及び外槽を基礎上に支持した縦置二重殻円筒形低温貯槽において、上記外槽の外槽底板は、スカートに接続固定したリング状の底板接続部材に取付けた梁部材の上に設置し、上記外槽の胴板下部のリング状の胴板接続部材の上記スカートへの各接続箇所となる取付部は、上下に荷重と伝熱の集中化を排除するための間隔をもたせ位置をずらして上記スカートへ接続固定し、かつ、上記外槽底板は、リング状の上下板と該上下板の間に設けたリブ板とからなる底板接続部材を上記スカートに接続固定し、該底板接続部材に底板支持材を取付けて、この底板支持材の上に設けたので、スカート内外の一致した箇所に溶接接続による接続箇所が一致しないため、荷重集中の分散がなされ強度が向上し、また冷熱の局部的な集中が解消され熱変動負荷による荷重も軽減され放熱機能的に優れ、かつ接続箇所の低温劣化を防止することができることに加えて、さらに放熱や対流の条件が悪いスカート内側であっても、表面積の広い底板接続部材からの放熱と入熱の熱出入が促進されるため、放熱入熱の効果が増すことに加えて、取付け支持の構造的な熱分散及び荷重分散機能が一層増加する。
Moreover, the outer tank attachment structure of the vertical double-shell cylindrical low-temperature storage tank according to the invention of claim 1 includes an inner tank and an outer tank that surrounds the inner tank via a cold insulation layer, In the vertical double-shell cylindrical low-temperature storage tank in which the inner tank and the outer tank are supported on the foundation by a cylindrical skirt that penetrates the end of the bottom plate and reaches the inner tank, the outer tank bottom plate of the outer tank has a skirt It is installed on the beam member attached to the ring-shaped bottom plate connecting member connected and fixed to, and the attachment portion which becomes each connection point to the skirt of the ring-shaped trunk plate connecting member at the bottom of the shell plate of the outer tub, The upper and lower plates are connected to and fixed to the skirt by shifting the position to eliminate load and heat concentration from above and below, and the outer tank bottom plate is a rib provided between the upper and lower plates. the bottom plate connecting member consisting of a plate fixedly connected to the skirt, the bottom plate support member to the bottom plate connecting member Put it, since there is provided on the bottom plate support, because the connection portions by matching portions in the welding connection of the skirt inner and outer do not match, to improve the dispersion is made the intensity of load concentration is also the local concentration of the cold In addition to eliminating the load caused by heat fluctuation and reducing heat load, it has excellent heat dissipation function and can prevent low temperature deterioration of the connection part. In addition , it has a large surface area even inside the skirt where heat dissipation and convection are poor. Since heat radiation and heat input / output of heat from the bottom plate connecting member are promoted, in addition to the effect of heat radiation heat input, the structural heat distribution and load distribution functions of the mounting support are further increased.
この発明に係る縦置二重殻円筒形低温貯槽の実施の形態について、図１乃至図６を参照して説明する。
図１はこの発明に係る縦置二重殻円筒形低温貯槽の全体縦断面を示し、図２は外槽取付構造の実施形態例を示し、図３及び図４は、図１の外槽取付構造の実施形態例の部分縦断面を示し、図５及び図６は別の実施形態例を示す。
An embodiment of a vertical double-shell cylindrical cryogenic storage tank according to the present invention will be described with reference to FIGS.
1 shows an overall longitudinal section of a vertical double-shell cylindrical cryogenic storage tank according to the present invention, FIG. 2 shows an embodiment of an outer tank mounting structure, and FIGS. 3 and 4 show the outer tank mounting of FIG. A partial longitudinal section of an example embodiment of the structure is shown, and FIGS. 5 and 6 show another example embodiment.
図１に示すように、低温液体を貯蔵する内槽１を設け、この内槽１を囲繞するように外槽２を設け、この内槽１と外槽２との間に保冷層３を設ける。
内槽１は、図のような半球形状又は半楕円形状（図示せず）などの上部鏡板６と、円筒形状の中間胴板７と、図のような半球形状又は半楕円形状（図示せず）などの下部鏡板８とで形成する。
外槽２は、図のような欠球形状又は上記内槽１の上部鏡板６と中心点を同じくする半球形状（図示せず）などの外槽屋根板９と、円筒形状の外槽側板１０と、外槽胴板１１と、図のような上記下部鏡板８よりも小さな曲率のなだらかな凹面円板形状又は水平円板形状（図示せず）などの外槽底板１２とで形成する。
円筒形状のスカート４は、内槽１の側面下端部から垂直下方に延出して外槽２の外槽底板１２端部を貫通し、基礎５の上に内槽１及び外槽２を支持する。
スカート４への外槽２の側板１０の下部の外槽胴板１１及び外槽底板１２の接続固定箇所を総称して取付部１７とする。
この取付部１７は、荷重と伝熱の集中化を排除するために、スカート４の外側に位置する外槽胴板１１の取付位置を、スカート４の内側に位置する外槽底板１２の取付位置より下方位置に、隔離して形成する。
As shown in FIG. 1, an inner tank 1 for storing a cryogenic liquid is provided, an outer tank 2 is provided so as to surround the inner tank 1, and a cold insulation layer 3 is provided between the inner tank 1 and the outer tank 2. .
The inner tub 1 includes an upper end plate 6 having a hemispherical shape or a semi-elliptical shape (not shown) as shown in the drawing, a cylindrical intermediate body plate 7, and a hemispherical shape or a semi-elliptical shape as shown (not shown). ) Or the like with the lower end plate 8.
The outer tub 2 has an outer tub roof plate 9 such as a spherical shape as shown in the figure or a hemispherical shape (not shown) having the same central point as the upper end plate 6 of the inner tub 1 and a cylindrical outer tub side plate 10. And an outer tank base plate 11 and an outer tank bottom plate 12 having a gentle concave disk shape or a horizontal disk shape (not shown) having a smaller curvature than the lower end plate 8 as shown in the figure.
The cylindrical skirt 4 extends vertically downward from the lower end of the side surface of the inner tub 1, penetrates the end of the outer tub bottom plate 12 of the outer tub 2, and supports the inner tub 1 and the outer tub 2 on the foundation 5. .
The connecting and fixing portions of the outer tank body plate 11 and the outer tank bottom plate 12 below the side plate 10 of the outer tank 2 to the skirt 4 are collectively referred to as an attachment portion 17.
In order to eliminate the concentration of load and heat transfer, the mounting portion 17 uses the mounting position of the outer tank shell plate 11 positioned outside the skirt 4 as the mounting position of the outer tank bottom plate 12 positioned inside the skirt 4. In a lower position, it is isolated and formed.
図２は、外槽の取付部１７近傍の他の事例で、外槽２の側板１０の下部の外槽胴板１１は、湾曲面に形成した場合を示す。
外槽胴板１１及び外槽底板１２は湾曲面に形成し、スカート４への各取付位置は互いに離してスカート４に接続固定する。つまり、外側に位置する外槽胴板１１の取付位置は、荷重と伝熱の集中化を排除するために、内側に位置する外槽底板１２の取付位置より下方に離した位置とする。
FIG. 2 shows another example of the vicinity of the outer tank mounting portion 17 and shows a case where the outer tank shell plate 11 below the side plate 10 of the outer tank 2 is formed on a curved surface.
The outer tank shell plate 11 and the outer tank bottom plate 12 are formed on curved surfaces, and the respective attachment positions to the skirt 4 are separated from each other and connected and fixed to the skirt 4. That is, the mounting position of the outer tank shell plate 11 located on the outer side is a position separated downward from the mounting position of the outer tank bottom plate 12 positioned on the inner side in order to eliminate concentration of load and heat transfer.
図１、図２に示すように、スカート４への外槽胴板１１及び外槽底板１２の取付位置は、スカート４の内外で一致させることなく、内外槽の形状、保冷層の厚さに対応して上下に隔離した位置とする。
As shown in FIG. 1 and FIG. 2, the mounting positions of the outer tank shell plate 11 and the outer tank bottom plate 12 to the skirt 4 do not coincide with each other on the inside and outside of the skirt 4. Correspondingly, the position should be separated vertically.
図３及び図４は、上記図１及び図２に示すスカート４へ外槽底板１２及び円すい形状の外槽胴板１１を接続し取付ける構造を拡大して示す実施形態例である。
図３は外槽底板１２を半球形状など湾曲面に形成した事例で、この外槽底板１２は、傾斜したリング状の底板接続部材１３に取付けた湾曲梁部材１５の上に設置する。この取付位置の外側の下方位置に傾斜したリング状の胴板接続部材１４を取付け、この胴板接続部材１４に傾斜した円すい形状の外槽胴板１１を接続する。１６は、間隔をおいて適宜設ける補強用のブラケットである。
3 and 4 show an embodiment in which the outer tank bottom plate 12 and the conical outer tank body plate 11 are connected to and attached to the skirt 4 shown in FIGS. 1 and 2 in an enlarged manner.
Figure 3 is a case where the outer tank bottom plate 12 is formed into a curved surface such as a hemispherical shape, the outer tank bottom plate 12 is placed on the bending beam member 15 attached to the ring-shaped bottom plate connecting member 13 which is inclined. An inclined ring-shaped body plate connecting member 14 is attached to a lower position outside the attaching position, and an inclined conical outer tank body plate 11 is connected to the body plate connecting member 14. Reference numeral 16 denotes a reinforcing bracket provided as appropriate at intervals.
図４は外槽底板１２を水平板形状に形成した事例で、この外槽底板１２は、断面逆Ｌ字形状アングル材のリング状の底板接続部材１３に取付けた水平梁部材１５の上に設置する。また、この取付位置の外側の下方位置にリング状の胴板接続部材１４を取付け、この胴板接続部材１４に傾斜した円すい形状の外槽胴板１１を接続する。１６は、間隔をおいて適宜設ける補強用のブラケットである。
Figure 4 is a case of forming the outer tank bottom plate 12 to the horizontal plate shape, the outer tank bottom plate 12, on a horizontal beam member (15) attached to the ring-shaped bottom plate connecting member 13 of the cross-sectional inverted L-shaped angle member Install. Further, a ring-shaped body plate connection member 14 is attached to a lower position outside the attachment position, and an inclined conical outer shell body plate 11 is connected to the body plate connection member 14. Reference numeral 16 denotes a reinforcing bracket provided as appropriate at intervals.
図１及び図２、図３及び図４に示すように、スカート４への外槽底板１２と円すい形状の外槽胴板１１の接続箇所である取付部１７を所定距離、例えばスカート４の板厚２０ミリメートルの場合、少なくとも２００〜３００ミリメートル程度離した距離とする。
この隔離距離は、応力集中や荷重応力の分散を配慮すると２００ミリメートル程度以上が好ましく、溶接棒が入り易い作業者の施工性や、伝熱集中の分散を配慮すると３００ミリメートル程度以上取ることが好ましい。
このように、スカート４への接続箇所を、荷重と伝熱の集中化を排除するために上下にずらすことにより、スカート４の内外の水平同一位置に溶接による接続箇所が一致しないため、外槽底板１２と円すい形状の外槽胴板１１の接続溶接作業の施工性が良く、荷重分散がなされ強度も向上する。また、スカート４への内外の接続箇所が一致しないため、冷熱を内外へ分散し放熱機能的にも優れ、冷熱の局部的な集中が免れ熱変動負荷による荷重も軽減され、接続箇所の低温劣化を防止することができる。さらに、結露や霜の発生を防止することができる。
As shown in FIGS. 1, 2, 3, and 4, the attachment portion 17, which is a connection point between the outer tank bottom plate 12 and the conical outer tank body plate 11, is connected to the skirt 4 by a predetermined distance, for example, the plate of the skirt 4. When the thickness is 20 millimeters, the distance is at least about 200 to 300 millimeters.
This separation distance is preferably about 200 mm or more in consideration of stress concentration and dispersion of load stress, and it is preferable to take about 300 mm or more in consideration of workability of an operator who easily enters a welding rod and dispersion of heat transfer concentration. .
Thus, for the connection into the skirt 4, by shifting up and down to eliminate the concentration of load and heat transfer, so that the connections of the welding in the horizontal same position and out of the skirt 4 do not match, the outer tub The workability of the connection welding work between the bottom plate 12 and the conical outer tank shell plate 11 is good, the load is distributed, and the strength is improved. In addition, because the internal and external connection points to the skirt 4 do not match, the cold heat is distributed inside and outside, and the heat dissipation function is excellent, the local concentration of the cold is avoided, the load due to the heat fluctuation load is reduced, and the low temperature deterioration of the connection points Can be prevented. Furthermore, the occurrence of condensation and frost can be prevented.
図５は、この発明に係る外槽取付構造の実施形態例で、リング状の上下板１３Ａ、１３Ｂとこの上下板１３Ａ、１３Ｂの間に設けたリブ板１３Ｃとからなる底板接続部材１３を上記スカート４に接続固定し、該底板接続部材１３に梁部材状の底板支持材１８を取付けて、この底板支持材１８の上に外槽底板１２を設けたものである。
このように外槽底板１２は、上下二枚の底板接続部材１３（１３Ａ、１３Ｂ）上に確りと支持することができるとともに、スカート４から下降する冷熱を底板接続部材１３で分散し放熱することができる。
つまり、放熱や対流の条件が悪いスカート４の内側の場所であっても、表面積の広い底板接続部材１３からの放熱と入熱の熱出入が促進され、取付け支持の構造的な熱分散及び荷重分散機能が増加する。
FIG. 5 shows an embodiment of the outer tub mounting structure according to the present invention . The bottom plate connecting member 13 comprising the ring-shaped upper and lower plates 13A and 13B and the rib plate 13C provided between the upper and lower plates 13A and 13B is shown in FIG. fixedly connected to the skirt 4, on the bottom plate connecting member 13 attached to the beam member shape of the bottom plate support member 18, is provided with a outer tank bottom plate 12 on the bottom plate support member 18.
In this manner, the outer tank bottom plate 12 can be securely supported on the two upper and lower bottom plate connecting members 13 (13A, 13B), and the cold heat descending from the skirt 4 is dispersed and radiated by the bottom plate connecting member 13. Can do.
That is, even in a place inside the skirt 4 where heat dissipation and convection conditions are poor, heat dissipation and heat input / output from the bottom plate connecting member 13 having a large surface area are promoted, and structural heat distribution and load of the mounting support are promoted. Distributed function increases.
図６は、この発明に係る外槽取付構造の取付部１７の実施形態例で、スカート４への外槽底板１２及び外槽胴板１１の接続箇所を上下にずらせた外槽取付構造である。
この取付部１７は、スカート４の内側は、リング状の上下板１３Ａ、１３Ｂなどからなる底板接続部材１３を上記スカート４に接続固定し、この底板接続部材１３に梁部材状の底板支持材１８を取付けて、この底板支持材１８の上に外槽底板１２を設け、さらにスカート４の外側は、底板接続部材１３より下方位置にリング状の胴板接続部材１４を取付け、この胴板接続部材１４に傾斜した円すい形状の外槽胴板１１を接続形成した事例である。
このように、この発明に係る取付部１７の構造は、熱を内外へ分散し放熱機能的に優れ、取付け支持の構造的な熱分散及び荷重分散機能が一層増加する。
FIG. 6 shows an embodiment of the mounting portion 17 of the outer tub mounting structure according to the present invention, which is an outer tub mounting structure in which the connection location of the outer tub bottom plate 12 and the outer tub trunk plate 11 to the skirt 4 is shifted up and down. .
The mounting portion 17 includes an inner skirt 4, a bottom plate connecting member 13 made of a ring-shaped upper and lower plates 13A, 13B fixedly connected to the skirt 4, the bottom plate connecting member 13 to the beam member shaped bottom plate support member 18 the attached, the outer tank bottom plate 12 provided on the bottom plate support member 18, the outer side of the skirt 4 is mounted a ring-shaped shell plate connecting member 14 to the lower position than the bottom plate connecting member 13, the shell plate connecting member 14 shows an example in which a conical outer tank shell plate 11 inclined to 14 is connected and formed.
Thus, the structure of the mounting portion 17 according to the present invention dissipates heat inward and outwards and is excellent in heat dissipation function, and the structural heat distribution and load distribution functions of the mounting support are further increased.
この発明に係る縦置二重殻円筒形低温貯槽の取付構造は、上記支持部の放熱構造と接続構造を有するので、機械的性能及び伝熱的安定性を向上させ、機能性と経済性に優れた低温貯槽を提供することができる。 Since the mounting structure of the vertical double-shell cylindrical cryogenic storage tank according to the present invention has the heat dissipation structure and the connection structure of the support part, the mechanical performance and the heat transfer stability are improved, and the functionality and economy are improved. An excellent low temperature storage tank can be provided.
１ 内槽
２ 外槽
３ 保冷層
４ スカート
５ 基礎
６ 上部鏡板
７ 中間胴板
８ 下部鏡板
９ 外槽屋根板
１０ 外槽側板
１１ 外槽胴板
１２ 外槽底板
１３ 底板接続部材
１４ 胴板接続部材
１５ 梁部材
１６ ブラケット
１７ 取付部
１８ 底板支持材
DESCRIPTION OF SYMBOLS 1 Inner tank 2 Outer tank 3 Cooling layer 4 Skirt 5 Foundation 6 Upper end plate 7 Intermediate body plate 8 Lower end plate 9 Outer tank roof plate 10 Outer tank side plate 11 Outer tank body plate 12 Outer tank bottom plate 13 Bottom plate connection member 14 Trunk plate connection member 15 Beam member 16 Bracket 17 Mounting portion 18 Bottom plate support material
Claims (1)
上記外槽の外槽底板は、スカートに接続固定したリング状の底板接続部材に取付けた梁部材の上に設置し、上記外槽の胴板下部のリング状の胴板接続部材の上記スカートへの各接続箇所となる取付部は、上下に荷重と伝熱の集中化を排除するための間隔をもたせ位置をずらして上記スカートへ接続固定し、
かつ、上記外槽底板は、リング状の上下板と該上下板の間に設けたリブ板とからなる底板接続部材を上記スカートに接続固定し、該底板接続部材に底板支持材を取付けて、この底板支持材の上に設けたことを特徴とする縦置二重殻円筒形低温貯槽の外槽取付構造。
An inner tub and an outer tub surrounding the inner tub through a cold insulation layer are provided, and the inner tub and the outer tub are based on a cylindrical skirt that penetrates the bottom plate end of the outer tub and reaches the inner tub. In the vertical double-shell cylindrical cryogenic storage tank supported above ,
Outer tank bottom plate of the outer tank, was placed on the beam member attached to the ring-shaped bottom plate connecting member fixedly connected to the skirt, to the skirt of the shell plate bottom of the ring-shaped body panel connecting members of the outer tub attaching portion serving as the connection point is connected and fixed to said skirt by shifting the intervals imparted position to eliminate the concentration of load and heat transfer in the upper and lower,
Further, the outer tank bottom plate has a bottom plate connecting member composed of a ring-shaped upper and lower plates and a rib plate provided between the upper and lower plates connected to the skirt, and a bottom plate support member is attached to the bottom plate connecting member. An outer tank mounting structure for a vertical double-shell cylindrical cryogenic storage tank, which is provided on a support material .
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