JP5737920B2 - Independent tank support structure - Google Patents

Independent tank support structure Download PDF

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Publication number
JP5737920B2
JP5737920B2 JP2010277282A JP2010277282A JP5737920B2 JP 5737920 B2 JP5737920 B2 JP 5737920B2 JP 2010277282 A JP2010277282 A JP 2010277282A JP 2010277282 A JP2010277282 A JP 2010277282A JP 5737920 B2 JP5737920 B2 JP 5737920B2
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Prior art keywords
tank
hull
side support
support base
reinforcing member
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JP2012126173A (en
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孝史 岡藤
孝史 岡藤
浩友 大塚
浩友 大塚
智 宮崎
智 宮崎
一浩 三浦
一浩 三浦
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Priority to JP2010277282A priority Critical patent/JP5737920B2/en
Priority to PCT/JP2011/076846 priority patent/WO2012081365A1/en
Priority to CN201180031622.5A priority patent/CN102958798B/en
Priority to KR1020127026940A priority patent/KR101503989B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B3/00—Hulls characterised by their structure or component parts
    • B63B3/14—Hull parts
    • B63B3/70—Reinforcements for carrying localised loads, e.g. propulsion plant, guns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/12—Supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/08—Mounting arrangements for vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/08—Mounting arrangements for vessels
    • F17C13/082—Mounting arrangements for vessels for large sea-borne storage vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B2025/087—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid comprising self-contained tanks installed in the ship structure as separate units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • F17C2201/0157—Polygonal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/018—Supporting feet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships

Description

本発明は、船体と構造的に分離された独立タンクを船体のタンク収容空間内に支持する独立タンクの支持構造に関し、特に、外気温度に対して温度差のある積荷が貯蔵されることにより熱伸縮する独立タンクの支持構造に関する。   The present invention relates to a support structure for an independent tank that supports an independent tank structurally separated from the hull in a tank housing space of the hull, and more particularly, by storing a load having a temperature difference with respect to the outside air temperature. The present invention relates to a support structure for an independent tank that expands and contracts.

一般に、船舶に搭載されるタンクには、船体と構造的に分離された独立タンクが多く用いられている。図６に、一例としてＬＰＧ（液化石油ガス）用タンカーの構成を示す。ここで、図６は船体内部に独立タンクを搭載した独立型タンカーの概略図であり、（Ａ）は船体横方向の断面図で、（Ｂ）は船体長さ方向の断面図である。独立タンク５は船体９のタンク収容空間６内に設置される。その際、独立タンク５は支持構造１によって鉛直方向の荷重が受け止められる。タンク収容空間６の側壁又は天井と独立タンク５との間にはホールドスペース７が形成され、アンカー（不図示）が取り付けてある。アンカーは、航海中、船体が横方向に振れてローリングを起こしたような場合、その動きを止めるために設けられている。   In general, an independent tank that is structurally separated from a hull is often used as a tank mounted on a ship. FIG. 6 shows a configuration of an LPG (liquefied petroleum gas) tanker as an example. Here, FIG. 6 is a schematic view of an independent tanker in which an independent tank is mounted inside the hull, where (A) is a cross-sectional view in the hull lateral direction and (B) is a cross-sectional view in the hull length direction. The independent tank 5 is installed in the tank accommodating space 6 of the hull 9. At that time, the independent tank 5 receives the load in the vertical direction by the support structure 1. A hold space 7 is formed between the side wall or ceiling of the tank housing space 6 and the independent tank 5, and an anchor (not shown) is attached. The anchor is provided to stop the movement of the hull when it rolls in the lateral direction during rolling.

図７に示すように、従来の独立タンクの支持構造１は、タンク底面５１に固設された複数のタンク側支持台２と、船体のタンク収容空間の底板９１に固設された複数の船体側支持台３と、タンク側支持台２と船体側支持台３との間に介在させた断熱性支持材４とを有する。断熱性支持材４は、鉛直方向に対して荷重を伝達するが水平方向に対しては拘束されず、タンク側支持台２及び船体側支持台３の少なくとも一方と摺動自在に配置される。そして、タンク側支持台２と断熱性支持材４の当接面、又は船体側支持台３と断熱性支持材４の当接面に生じる摩擦力により独立タンク５の位置が保持されている。   As shown in FIG. 7, the conventional independent tank support structure 1 includes a plurality of tank-side support bases 2 fixed to a tank bottom surface 51 and a plurality of hulls fixed to a bottom plate 91 of a tank housing space of the hull. A side support base 3, and a heat insulating support material 4 interposed between the tank side support base 2 and the hull side support base 3. The heat insulating support 4 transmits a load in the vertical direction but is not constrained in the horizontal direction, and is slidably disposed on at least one of the tank side support base 2 and the hull side support base 3. The position of the independent tank 5 is held by the frictional force generated on the contact surface between the tank side support base 2 and the heat insulating support material 4 or the contact surface between the hull side support base 3 and the heat insulating support material 4.

このような支持構造を採用する理由の一つとして、独立タンクの熱伸縮対策が挙げられる。例えば、ＬＰＧ用タンカーやＬＮＧ（液化天然ガス）用タンカーにおいては、タンク内に貯蔵される積荷は約−１６０℃程度の低温、又は、約−４５℃程度の低温の液化ガスである。これらの低温の積荷が独立タンク内に貯蔵されると独立タンクは収縮し、空の状態になると膨張する。一方、高温の積荷が独立タンク内に貯蔵されると独立タンクは膨張し、空の状態になると収縮する。このような積荷の積み下ろし時の温度変化に伴う独立タンクの伸縮に対応可能なように、独立タンクの底面を船体に固定せず、タンク側支持台と船体側支持台が断熱性支持材を介して摺動自在となる構成としている。   One reason for adopting such a support structure is a measure against thermal expansion and contraction of the independent tank. For example, in an LPG tanker or an LNG (liquefied natural gas) tanker, the cargo stored in the tank is a liquefied gas at a low temperature of about −160 ° C. or a low temperature of about −45 ° C. When these cold loads are stored in the independent tank, the independent tank contracts and expands when empty. On the other hand, the independent tank expands when a high-temperature load is stored in the independent tank, and contracts when it becomes empty. The bottom of the independent tank is not fixed to the hull so that the expansion and contraction of the independent tank accompanying the temperature change during loading and unloading of the load can be accommodated. And slidable.

関連する技術として特許文献１（特開昭６１−８１２８７号公報）に独立タンクの支持方法が開示されている。この特許文献１の支持方法は、船体床板上に固定された支持台上に断熱材を介して独立タンクを支持する際に、タンク底板と断熱材との間に鋼板を挿入している。このように鋼板を挿入することによりタンク荷重による応力を分散させることができる。
また、特許文献２（特開２０００−１９０８９１号公報）には船載タンクの支持構造が開示されている。この特許文献２の支持構造は、タンク側支持台と船体側支持台との間に断熱性支持材からなるシートを複数介在させた構成を有している。さらにタンク端部の断熱性支持材をそれ以外の断熱性支持材より低ヤング率として、タンクへの応力集中を緩和させている。 As a related technique, Japanese Patent Application Laid-Open No. 61-81287 discloses a method for supporting an independent tank. In the support method of Patent Document 1, when an independent tank is supported via a heat insulating material on a support base fixed on a hull floor plate, a steel plate is inserted between the tank bottom plate and the heat insulating material. Thus, the stress due to the tank load can be dispersed by inserting the steel plate.
Patent Document 2 (Japanese Patent Application Laid-Open No. 2000-190891) discloses a support structure for a shipboard tank. The support structure of Patent Document 2 has a configuration in which a plurality of sheets made of a heat insulating support material are interposed between a tank side support base and a hull side support base. Furthermore, the heat insulating support material at the end of the tank is made to have a lower Young's modulus than other heat insulating support materials, so that stress concentration on the tank is alleviated.

特開昭６１−８１２８７号公報JP 61-81287 A 特開２０００−１９０８９１号公報JP 2000-190891 A

図８は従来の独立タンクの偏心応力を説明する図であり、（Ａ）は支持構造の側面図で、（Ｂ）はタンク側支持台と船体側支持台の位置関係を示す図である。
特許文献１や特許文献２等に開示される従来の支持構造においては、積荷の積み下ろし時の温度変化に伴い独立タンクが熱伸縮することによって、図８（Ａ）に示すようにタンク側支持台２の荷重中心Ｐ１と船体側支持台３の荷重中心Ｐ２がずれ、支持台２、３や支持材４に偏心応力が加わる。そのため、タンク側支持台２や船体側支持台３は、偏心荷重による応力集中によって変形してしまう惧れがある。支持台２、３に変形が生じると、独立タンクを安定して支持することができない。 8A and 8B are diagrams for explaining the eccentric stress of a conventional independent tank. FIG. 8A is a side view of the support structure, and FIG. 8B is a diagram showing the positional relationship between the tank side support base and the hull side support base.
In the conventional support structure disclosed in Patent Document 1, Patent Document 2, and the like, the tank-side support base as shown in FIG. The load center P1 of 2 and the load center P2 of the hull-side support base 3 are shifted, and eccentric stress is applied to the support bases 2 and 3 and the support material 4. Therefore, the tank side support base 2 and the hull side support base 3 may be deformed due to stress concentration due to the eccentric load. If the support bases 2 and 3 are deformed, the independent tank cannot be stably supported.

一方、タンク側支持台２や船体側支持台３を偏心応力に耐え得る構造とするためには、十分な板厚が必要となる。しかし、これらの支持台２、３は多数設けられるため支持台２、３の板厚を厚くすると重量が大きくなってしまうという問題がある。図８（Ｂ）中の矢印は、熱伸縮によるタンク側支持台２と船体側支持台３とのずれを示す。独立タンクと船体との温度差が大きくなればなるほどずれは大きくなり、タンク側支持台２と船体側支持台３との偏心量及び偏心荷重が大きくなり、偏心荷重による支持台の強度不足が問題となる。   On the other hand, in order to make the tank side support base 2 and the hull side support base 3 have a structure capable of withstanding the eccentric stress, a sufficient plate thickness is required. However, since a large number of these support bases 2 and 3 are provided, there is a problem that if the thickness of the support bases 2 and 3 is increased, the weight increases. The arrows in FIG. 8B indicate the displacement between the tank side support base 2 and the hull side support base 3 due to thermal expansion and contraction. The larger the temperature difference between the independent tank and the hull, the greater the deviation, and the amount of eccentricity and the eccentric load between the tank side support base 2 and the hull side support base 3 increase, resulting in insufficient strength of the support base due to the eccentric load. It becomes.

したがって、本発明はかかる従来技術の問題に鑑み、独立タンクの温度変化に伴う熱伸縮によってタンク側支持部及び船体側支持部の荷重中心が相互に偏心した場合においても、これらの支持部に対する応力集中を緩和でき、安定して独立タンクを支持可能な独立タンクの支持構造を提供することを目的とする。   Therefore, in view of the problems of the prior art, the present invention provides stress to these support portions even when the load centers of the tank side support portion and the hull side support portion are eccentric from each other due to thermal expansion and contraction accompanying the temperature change of the independent tank. It is an object of the present invention to provide an independent tank support structure that can reduce concentration and can stably support an independent tank.

上記の課題を解決するために、第１の発明に係る独立タンクの支持構造は、外気温度に対して温度差のある積荷が貯蔵される独立タンクの支持構造であって、前記独立タンクの底面に固設された複数のタンク側支持台と、船体のタンク収容空間の底板に固設された複数の船体側支持台と、前記タンク側支持台と前記船体側支持台との間に介在され、前記タンク側支持台及び前記船体側支持台の少なくとも一方と摺動自在に形成された断熱性支持材とを有する独立タンクの支持構造において、前記独立タンクの底面は、前記底板に対して相対的に変位しない起点を中心として前記温度差により放射状に伸縮するように構成されており、前記タンク側支持台及び前記船体側支持台にはそれぞれ、前記タンク側支持台の荷重中心と前記船体側支持台の荷重中心とが前記底面の伸縮により相互に偏心する偏心領域を含む部位に、タンク荷重に対して前記支持台を補強する補強部材が設けられ、前記タンク側支持台及び前記船体側支持台は、前記断熱性支持材に面接触する天板部と、一側縁部が前記天板部に接続されるとともに該天板部に直交する荷重中心軸を通り且つ該荷重中心軸を中心として放射状に配置された複数の平板部材からなる脚部と、一側縁部が前記天板部に接続されるとともに前記荷重中心の周囲に周方向に設けられ隣り合う前記平板部材同士の間に架設された前記補強部材とを含むことを特徴とする。 In order to solve the above-mentioned problems, an independent tank support structure according to a first aspect of the present invention is an independent tank support structure in which a load having a temperature difference with respect to the outside air temperature is stored. A plurality of tank side support bases, a plurality of hull side support bases fixed to the bottom plate of the tank housing space of the hull, and the tank side support base and the hull side support base. In the independent tank support structure having at least one of the tank side support base and the hull side support base and a heat insulating support material formed to be slidable, the bottom surface of the independent tank is relative to the bottom plate. The tank side support base and the hull side support base are respectively loaded with the load center of the tank side support base and the hull side. Support stand The site where the load center including an eccentric region eccentrically to each other by expansion and contraction of the bottom surface, the reinforcing member is provided for reinforcing the support table with respect to the tank loading, the tank supporting base and the hull supporting block, The top plate portion that is in surface contact with the heat insulating support material, and one side edge portion is connected to the top plate portion and passes through the load center axis orthogonal to the top plate portion and radially about the load center axis A leg portion composed of a plurality of flat plate members arranged and one side edge portion are connected to the top plate portion and provided between the adjacent flat plate members provided in the circumferential direction around the load center. The reinforcing member is included .

本第１発明では、タンク側支持台及び船体側支持台に補強部材が設けられている。さらにこの補強部材は、独立タンクの熱伸縮によりタンク側支持台の荷重中心と船体側支持台の荷重中心とが相互に偏心する偏心領域を含む部位に設けられている。この補強部材によって、偏心荷重によるタンク側支持台及び船体側支持台への応力集中を緩和することができる。したがって、タンク側支持台及び船体側支持台の変形を防止でき安定して独立タンクを支持可能な支持構造とすることができる。また、補強部材を設けることにより、偏心荷重対策として板厚を厚くする必要がなくなり、支持構造の重量増加を防止できる。   In this 1st invention, the reinforcement member is provided in the tank side support stand and the hull side support stand. Further, the reinforcing member is provided at a portion including an eccentric region where the load center of the tank side support base and the load center of the hull side support base are eccentric from each other due to thermal expansion and contraction of the independent tank. By this reinforcing member, stress concentration on the tank side support base and the hull side support base due to the eccentric load can be reduced. Therefore, it is possible to prevent the deformation of the tank side support base and the hull side support base and to provide a support structure capable of stably supporting the independent tank. Further, by providing the reinforcing member, it is not necessary to increase the plate thickness as a measure against the eccentric load, and an increase in the weight of the support structure can be prevented.

また、補強部材がそれぞれ設けられたタンク側支持台と船体側支持台とを用いているため、独立タンクは既存のものを用いることができる。
さらに、独立タンクの底面は、船体の底板に対して相対的に変位しない起点を中心として放射状に伸縮するように構成されているため、タンク側支持台及び船体側支持台の偏心領域を容易に特定可能で、補強部材を必要部位に確実に設置することができる。
なお、外気温度とはタンク周囲の温度のことであり、タンク周囲は室外であってもよいし、室内であってもよい。 Moreover, since the tank side support stand and the hull side support stand each provided with the reinforcement member are used, the existing independent tank can be used.
Furthermore, since the bottom surface of the independent tank is configured to expand and contract radially from the starting point that does not displace relative to the bottom plate of the hull, the eccentric area of the tank side support base and the hull side support base can be easily provided. The reinforcement member can be surely installed at a necessary portion.
The outside air temperature is a temperature around the tank, and the tank circumference may be outdoor or indoor.

第２の発明に係る独立タンクの支持構造は、外気温度に対して温度差のある積荷が貯蔵される独立タンクの支持構造であって、船体のタンク収容空間の底板に固設された複数の船体側支持台と、前記独立タンクの底部内構材が位置する底面部位と前記船体側支持台との間に介在され、前記底面部位及び前記船体側支持台の少なくとも一方と摺動自在に形成された断熱性支持材とを有する独立タンクの支持構造において、前記独立タンクの底面は、前記底板に対して相対的に変位しない起点を中心として前記温度差により放射状に伸縮するように構成されており、前記底部内構材及び前記船体側支持台にはそれぞれ、前記底部内構材による底面支持点と前記船体側支持台の荷重中心とが前記底面の伸縮により相互に偏心する偏心領域を含む部位に、タンク荷重に対して前記底部内構材又は前記船体側支持台を補強する補強部材が設けられ、前記船体側支持台は、前記断熱性支持材に面接触する天板部と、一側縁部が前記天板部に接続されるとともに該天板部に直交する荷重中心軸を通り且つ該荷重中心軸を中心として放射状に配置された複数の平板部材からなる脚部と、一側縁部が前記天板部に接続されるとともに前記荷重中心の周囲に周方向に設けられ隣り合う前記平板部材同士の間に架設された前記補強部材とを含むことを特徴とする。 An independent tank support structure according to a second aspect of the invention is an independent tank support structure in which a load having a temperature difference with respect to the outside air temperature is stored, and a plurality of fixed structures fixed to a bottom plate of a tank housing space of a hull. A hull-side support base, a bottom surface portion where the bottom internal structure material of the independent tank is located, and the hull-side support base, are formed to be slidable with at least one of the bottom surface portion and the hull-side support base. In the independent tank support structure having the heat insulating support material formed, the bottom surface of the independent tank is configured to expand and contract radially due to the temperature difference around a starting point that does not displace relative to the bottom plate. Each of the bottom interior material and the hull side support base includes an eccentric region where the bottom surface support point by the bottom internal material and the load center of the hull side support base are eccentric from each other by expansion and contraction of the bottom surface. Part The bottom Uchigamae member or the reinforcing member for reinforcing the hull supporting stand is provided for the tank loading, the hull supporting base includes a top plate for surface contact with the heat-insulating support member, one side edge A leg portion composed of a plurality of flat plate members that are connected to the top plate portion and pass through the load center axis orthogonal to the top plate portion and are arranged radially about the load center axis; and one side edge portion Is connected to the top plate portion, and is provided in the circumferential direction around the load center and includes the reinforcing member provided between the adjacent flat plate members .

本第２発明では、底部内構材及び船体側支持台に補強部材が設けられている。さらにこの補強部材は、独立タンクの熱伸縮により、底部内構材による底面支持点と船体側支持台の荷重中心とが相互に偏心する偏心領域を含む部位に設けられている。この補強部材によって、偏心荷重による底面及び船体側支持台への応力集中を緩和することができる。したがって、タンク底面の変形を防止できるとともに、船体側支持台の変形を防止でき安定して独立タンクを支持可能な支持構造とすることができる。また、補強部材を設けることにより、偏心荷重対策としてタンク底面や船体側支持台の板厚を厚くする必要がなくなり、タンクや支持構造の重量増加を防止できる。   In the second aspect of the invention, the reinforcing member is provided on the bottom inner construction material and the hull side support base. Furthermore, this reinforcing member is provided in a portion including an eccentric region where the bottom surface supporting point by the bottom inner construction material and the load center of the hull side support base are eccentric from each other due to thermal expansion and contraction of the independent tank. This reinforcing member can alleviate stress concentration on the bottom surface and the hull side support base due to the eccentric load. Accordingly, it is possible to prevent the deformation of the bottom surface of the tank and to prevent the deformation of the hull side support base and to provide a support structure capable of stably supporting the independent tank. Further, by providing the reinforcing member, it is not necessary to increase the thickness of the tank bottom surface or the hull side support base as a measure against the eccentric load, and the increase in the weight of the tank or the support structure can be prevented.

ここで、前記底部内構材とは、独立タンク自体の補強を目的としてタンク底面より内側に設けられた構材（骨材を含む）である。前記底部内構材による底面支持点とは、底部内構材が接続されている底面位置の少なくとも一点であり、特に、複数の底部内構材が交差して底面のうち最も変形強度が高い点であることが好ましい。
また、独立タンク側には支持台を設けずに底部内構材に補強部材を設けた構成としているため、支持構造の重量低減や工数削減によるコスト低減が可能となる。
さらに、独立タンクの底面は、船体の底板に対して相対的に変位しない起点を中心として放射状に伸縮するように構成されているため偏心領域を容易に特定可能で、補強部材を必要部位に確実に設置することができる。 Here, the bottom inner construction material is a construction material (including aggregate) provided on the inner side of the tank bottom for the purpose of reinforcing the independent tank itself. The bottom surface supporting point by the bottom inner structural material is at least one point of the bottom surface position to which the bottom inner structural material is connected, and in particular, the point having the highest deformation strength among the bottom surfaces by crossing a plurality of bottom inner structural materials. It is preferable that
In addition, since the support member is not provided on the independent tank side and the reinforcing member is provided on the bottom inner construction material, it is possible to reduce the cost by reducing the weight of the support structure and man-hours.
In addition, the bottom surface of the independent tank is configured to expand and contract radially from the starting point that does not displace relative to the bottom plate of the hull. Can be installed.

上記した第１の発明及び第２の発明において、以下の構成を備えていてもよい。
前記補強部材は、前記荷重中心の周囲のうち前記偏心領域を含むように部分的に設けられていてもよい。
これにより、偏心荷重による応力集中に対応した必要最低限の補強を行うとともに、支持構造の重量低減が可能となる。 In the first invention and the second invention described above, the following configuration may be provided.
The reinforcing member may be partially provided so as to include the eccentric region in the periphery of the load center.
As a result, the minimum necessary reinforcement corresponding to the stress concentration due to the eccentric load is performed, and the weight of the support structure can be reduced.

また、前記補強部材は、前記荷重中心の周囲全周に亘って設けられていてもよい。
これにより、タンク底面の伸縮方向に対する補強部材の位置を考慮する必要がなくなる。したがって、支持台に補強部材が設けられる場合には支持台を独立タンクに取り付ける作業が容易となり、底部内構材に補強部材が設けられる場合には補強部材の取り付け作業が容易となる。 The reinforcing member may be provided over the entire periphery of the load center.
This eliminates the need to consider the position of the reinforcing member relative to the expansion / contraction direction of the tank bottom. Therefore, when the reinforcing member is provided on the support base, the work of attaching the support base to the independent tank is facilitated, and when the reinforcing member is provided on the bottom structure material, the attaching work of the reinforcing member is facilitated.

また、第１の発明では、前記タンク側支持台及び前記船体側支持台は、前記断熱性支持材に面接触する天板部と、一側縁部が前記天板部に接続されるとともに該天板部に直交する荷重中心軸を通り且つ該荷重中心軸を中心として放射状に配置された複数の平板部材からなる脚部と、一側縁部が前記天板部に接続されるとともに前記荷重中心の周囲に周方向に設けられ隣り合う前記平板部材同士の間に架設された前記補強部材とを含むことを特徴とする。
また、第２の発明では、前記船体側支持台は、前記断熱性支持材に面接触する天板部と、一側縁部が前記天板部に接続されるとともに該天板部に直交する荷重中心軸を通り且つ該荷重中心軸を中心として放射状に配置された複数の平板部材からなる脚部と、一側縁部が前記天板部に接続されるとともに前記荷重中心の周囲に周方向に設けられ隣り合う前記平板部材同士の間に架設された前記補強部材とを含むことを特徴とする。
これら第１の発明及び第２の発明の構成によれば、脚部を形成する複数の平板部材は、荷重中心軸を中心として放射状に配置されることとなる。さらに隣り合う平板部材同士の間に補強部材を架設することにより、偏心荷重を荷重中心軸に軸力として伝達させることができ、荷重中心の偏心による応力を低減することが可能である。 In the first invention, the tank-side support base and the hull-side support base are connected to the top plate portion in surface contact with the heat insulating support material, and one side edge portion is connected to the top plate portion. a leg portion comprising a plurality of flat plate members disposed radially load center axis orthogonal to the top plate around the through Ri and該荷heavy central axis, wherein with one side edge portion is connected to the top plate portion The reinforcing member is provided between the adjacent flat plate members provided in a circumferential direction around a load center .
In the second aspect of the invention, the hull side support base includes a top plate portion that is in surface contact with the heat insulating support member, and one side edge portion is connected to the top plate portion and is orthogonal to the top plate portion. A leg portion composed of a plurality of flat plate members passing through the load center axis and radially arranged around the load center axis, and one side edge portion are connected to the top plate portion and circumferentially around the load center And the reinforcing member laid between the adjacent flat plate members.
According to the configurations of the first and second inventions, the plurality of flat plate members forming the leg portions are arranged radially about the load center axis. Further, by installing a reinforcing member between adjacent flat plate members, an eccentric load can be transmitted as an axial force to the load center axis, and stress due to the eccentricity of the load center can be reduced.

さらに、第１の発明及び第２の発明において、以下の構成を備えていてもよい。
前記補強部材は、前記天板部から前記脚部の鉛直方向全長に亘って設けられていてもよい。
本構成によれば、補強部材の上下端部が、天板部とタンク底面又は船体の底板とにそれぞれ当接して天板部を支持するため、荷重中心軸の他に補強部材においても鉛直方向にタンク荷重を伝達することができ、より大きな偏心荷重にも対応可能である。 Furthermore, in the first invention and the second invention, the following configuration may be provided.
The reinforcing member may be provided over the entire vertical length of the leg portion from the top plate portion.
According to this configuration, the upper and lower end portions of the reinforcing member abut on the top plate portion and the tank bottom surface or the bottom plate of the hull to support the top plate portion. The tank load can be transmitted to the tank, and a larger eccentric load can be handled.

また、前記補強部材は、前記天板部から前記脚部の鉛直方向全長より短い位置まで設けられていてもよい。
これにより、補強部材を小型化することができ、支持構造の重量低減が可能となる。 Moreover, the said reinforcement member may be provided from the said top plate part to the position shorter than the vertical direction full length of the said leg part.
Thereby, a reinforcement member can be reduced in size and the weight of a support structure can be reduced.

さらに、前記補強部材は、隣り合う前記平板部材間の中央部の方が該平板部材に接続される端部側より鉛直方向長さが短くなるように形成されていることが好ましい。
支持台において天板で受けた荷重は、補強部材から平板部材に伝達される。したがって、荷重の伝達に寄与しない平板部材間中央部の補強部材を端部側より短くすることにより、補強部材をより一層小型化することができ、支持構造の重量低減が可能となる。 Further, the reinforcing member is preferably towards the central portion between the adjacent flat plate member is formed as a vertical direction length from the end side connected to said flat plate member is shortened.
The load received by the top plate in the support base is transmitted from the reinforcing member to the flat plate member . Therefore, by shortening the reinforcing member at the central portion between the flat plate members that does not contribute to load transmission from the end side, the reinforcing member can be further reduced in size, and the weight of the support structure can be reduced.

以上記載のように本発明によれば、タンク側支持台及び船体側支持台、又はタンクの底部内構材及び船体側支持台に補強部材を設け、該補強部材を荷重中心の偏心領域を含む部位に設けることにより、偏心荷重による応力集中を緩和することができる。したがって、タンク側支持台及び船体側支持台、又はタンク底面及び船体側支持台の変形を防止でき安定して独立タンクを支持可能な支持構造とすることができる。また、補強部材を設けることにより、偏心荷重対策として板厚を厚くする必要がなくなり、支持構造の重量増加を防止できる。
また、独立タンクの底面は、船体の底板に対して相対的に変位しない起点を中心として放射状に伸縮するように構成されているため、偏心領域を容易に特定可能で、補強部材を必要部位に確実に設置することができる。 As described above, according to the present invention, the tank-side support base and the hull-side support base, or the bottom inner structure material of the tank and the hull-side support base are provided with a reinforcing member, and the reinforcing member includes an eccentric region with a load center. By providing at the site, stress concentration due to the eccentric load can be relaxed. Therefore, it is possible to prevent the tank-side support and the hull-side support, or the tank bottom surface and the hull-side support from being deformed, and to provide a support structure that can stably support the independent tank. Further, by providing the reinforcing member, it is not necessary to increase the plate thickness as a measure against the eccentric load, and an increase in the weight of the support structure can be prevented.
In addition, since the bottom surface of the independent tank is configured to expand and contract radially from the starting point that does not displace relative to the bottom plate of the hull, the eccentric region can be easily specified, and the reinforcing member can be used as a necessary part. It can be installed reliably.

本発明の第１実施形態に係る独立タンクの支持構造を説明する図であり、（Ａ）は支持構造の側面図で、（Ｂ）はタンク側支持台と船体側支持台の位置関係を示す図である。It is a figure explaining the support structure of the independent tank which concerns on 1st Embodiment of this invention, (A) is a side view of a support structure, (B) shows the positional relationship of a tank side support stand and a hull side support stand. FIG. 独立タンクの底面を示す図である。It is a figure which shows the bottom face of an independent tank. 本発明の実施形態に係る独立タンクの支持構造の変形例を説明する図であり、（Ａ）〜（Ｇ）のそれぞれにおいて上図は支持台の平面図で、下図は支持台の側面図である。It is a figure explaining the modification of the support structure of the independent tank which concerns on embodiment of this invention, In each of (A)-(G), an upper figure is a top view of a support stand, and a lower figure is a side view of a support stand. is there. 本発明の第２実施形態に係る独立タンクの支持構造を示す側面図である。It is a side view which shows the support structure of the independent tank which concerns on 2nd Embodiment of this invention. 本発明の第２実施形態に係る底部内構材を示す斜視図である。It is a perspective view which shows the bottom part construction material which concerns on 2nd Embodiment of this invention. 船体内部に独立タンクを搭載した独立型タンカーの概略図であり、（Ａ）は船体横方向の断面図で、（Ｂ）は船体長さ方向の断面図である。It is the schematic of the independent tanker which mounted the independent tank inside the hull, (A) is sectional drawing of a hull lateral direction, (B) is sectional drawing of a hull length direction. 従来の独立タンクの支持構造を示す側面図である。It is a side view which shows the support structure of the conventional independent tank. 従来の独立タンクの偏心荷重を説明する図であり、（Ａ）は支持構造の側面図で、（Ｂ）はタンク側支持台と船体側支持台の位置関係を示す図である。It is a figure explaining the eccentric load of the conventional independent tank, (A) is a side view of a support structure, (B) is a figure which shows the positional relationship of a tank side support stand and a hull side support stand.

以下、図面を参照して本発明の好適な実施形態を例示的に詳しく説明する。但しこの実施形態に記載されている構成部品の寸法、材質、形状、その相対的配置等は特に特定的な記載がない限りは、この発明の範囲をそれに限定する趣旨ではなく、単なる説明例に過ぎない。
本発明の実施形態に係る独立タンクの支持構造は、外気温度に対して温度差のある積荷が貯蔵される独立タンクを、船体のタンク収容空間内に支持する際に用いられる。ここで、外気温度とはタンク周囲の温度のことであり、タンク周囲は室外であってもよいし、室内であってもよい。 Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.
The support structure of the independent tank according to the embodiment of the present invention is used when supporting the independent tank in which a load having a temperature difference with respect to the outside air temperature is stored in the tank housing space of the hull. Here, the outside air temperature is a temperature around the tank, and the tank circumference may be outdoor or indoor.

（第１実施形態）
図１は本発明の第１実施形態に係る独立タンクの支持構造を説明する図であり、（Ａ）は支持構造の側面図で、（Ｂ）はタンク側支持台と船体側支持台の位置関係を示す図である。なお、図１（Ｂ）は支持構造１を上方から見た図であり、タンク側支持台２及び船体側支持台３においてそれぞれ天板２１、３１は省略している。
本発明の第１実施形態に係る独立タンクの支持構造１は、独立タンクの底面５１に固設されたタンク側支持台２と、船体のタンク収容空間の底板９１に固設された船体側支持台３と、タンク側支持台２と船体側支持台３との間に介在させた断熱性支持材４とを有する。 (First embodiment)
1A and 1B are views for explaining a support structure for an independent tank according to a first embodiment of the present invention, in which FIG. 1A is a side view of the support structure, and FIG. 1B is a position of a tank side support base and a hull side support base. It is a figure which shows a relationship. 1B is a view of the support structure 1 as viewed from above, and the top plates 21 and 31 are omitted from the tank side support base 2 and the hull side support base 3, respectively.
The independent tank support structure 1 according to the first embodiment of the present invention includes a tank-side support 2 fixed to a bottom surface 51 of the independent tank and a hull-side support fixed to a bottom plate 91 of a tank housing space of the hull. A base 3 and a heat insulating support 4 interposed between the tank side support base 2 and the hull side support base 3 are provided.

タンク側支持台２は、独立タンクの荷重を支えるものであり、独立タンクの底面５１に所定間隔を隔てて複数固設されている。タンク側支持台２としては剛性の高い材料が用いられ、例えば鋼材が用いられる。
さらに、タンク側支持台２は、タンク荷重に対してタンク側支持台２を補強する補強部材２３が設けられている。この補強部材２３の構成については後述する。
タンク側支持台２の好適な構成として、タンク側支持台２は、断熱性支持材４に面接触する天板部２１と、一側縁部が天板部２１に接続されるとともに該天板部２１に直交する荷重中心軸Ｐ１を通るように配置された複数の平板部材からなる脚部２２とを含む。さらに、一側縁部が天板部２１に接続されるとともに、脚部２２の隣り合う平板部材同士の間に架設された補強部材２３とを含む。この補強部材２３はプレート状であることが好ましい。 The tank-side support base 2 supports the load of the independent tank, and a plurality of tank-side support bases 2 are fixed to the bottom surface 51 of the independent tank at a predetermined interval. The tank side support 2 is made of a material having high rigidity, for example, steel.
Furthermore, the tank side support base 2 is provided with a reinforcing member 23 that reinforces the tank side support base 2 against the tank load. The configuration of the reinforcing member 23 will be described later.
As a preferred configuration of the tank side support base 2, the tank side support base 2 includes a top plate portion 21 that is in surface contact with the heat insulating support material 4, and one side edge portion connected to the top plate portion 21 and the top plate. And leg portions 22 made of a plurality of flat plate members arranged so as to pass through the load center axis P <b> 1 orthogonal to the portion 21. Further, one side edge portion is connected to the top plate portion 21, and a reinforcing member 23 is provided between adjacent flat plate members of the leg portion 22. The reinforcing member 23 is preferably plate-shaped.

船体側支持台３は、タンク側支持台２及び断熱性支持材４を介して独立タンクの荷重を支えるものであり、船体のタンク収容空間の底板９１に所定間隔を隔てて複数固設されている。
さらに、船体側支持台３は、タンク荷重に対して船体側支持台３を補強する補強部材３３が設けられている。この補強部材３３の構成については、タンク側支持台２の補強部材２３とともに後述する。
船体側支持台３の好適な構成として、上記したタンク側支持台２と同一の構成を用いることができる。すなわち、船体側支持台３は、天板部３１と、脚部３２と補強部材３３とを含む。 The hull side support base 3 supports the load of the independent tank via the tank side support base 2 and the heat insulating support material 4, and a plurality of the hull side support bases 3 are fixed to the bottom plate 91 of the tank accommodating space of the hull at a predetermined interval. Yes.
Further, the hull side support base 3 is provided with a reinforcing member 33 that reinforces the hull side support base 3 against the tank load. The configuration of the reinforcing member 33 will be described later together with the reinforcing member 23 of the tank side support 2.
As a suitable configuration of the hull supporting table 3, the same configuration as the tank supporting table 2 described above can be used. That is, the hull side support base 3 includes a top plate portion 31, a leg portion 32, and a reinforcing member 33.

断熱性支持材４は、独立タンクの荷重を支えるとともに、独立タンクの底面５１と、船体のタンク収容空間の底板９１との間の断熱材として機能する。この断熱性支持材４としては、樹脂を含浸させて強度を増した木材、樹脂、若しくは布等で補強された樹脂などが用いられる。さらにこれらの薄板状材料を積層したものが好適に用いられる。具体的には、断熱性支持材４は例えばフェノール樹脂の積層材としてベークライトのような布をフェノール樹脂で固めながら積層したもの、又は木材に樹脂を含浸させて固めたもの等が挙げられる。   The heat insulating support material 4 supports the load of the independent tank and functions as a heat insulating material between the bottom surface 51 of the independent tank and the bottom plate 91 of the tank housing space of the hull. As the heat insulating support material 4, wood, resin, or resin reinforced with a cloth impregnated with resin to increase strength is used. Further, a laminate of these thin plate materials is preferably used. Specifically, the heat insulating support material 4 includes, for example, a laminate of a bakelite as a laminate of phenol resin while being hardened with a phenol resin, or a material in which wood is impregnated with resin and hardened.

また、断熱性支持材４は、タンク側支持台２と船体側支持台３との間に介在され、タンク側支持台２及び船体側支持台３の少なくとも一方と摺動自在に形成されている。すなわち、断熱性支持材４とタンク側支持台２、又は断熱性支持材４と船体側支持台３を固定して、断熱性支持材４と固定されていない側の支持台が断熱性支持材４と摺動するようにしてもよいし、断熱性支持材４と両支持台とが摺動するようにしてもよい。このとき、断熱性支持材４の表面は、船体の揺動に対しては独立タンクを保持し、且つ独立タンクの熱伸縮に対してはタンク側支持台２又は船体側支持台３と摺動するような摩擦係数を有していることが好ましい。   The heat insulating support material 4 is interposed between the tank side support base 2 and the hull side support base 3 and is slidable with at least one of the tank side support base 2 and the hull side support base 3. . That is, the heat-insulating support material 4 and the tank-side support base 2 or the heat-insulating support material 4 and the hull-side support base 3 are fixed, and the heat-insulating support material 4 and the non-fixed support base are the heat-insulating support material. 4 may be slid, or the heat insulating support material 4 and both support bases may be slid. At this time, the surface of the heat insulating support material 4 holds the independent tank against the swing of the hull and slides with the tank side support base 2 or the hull side support base 3 against the thermal expansion and contraction of the independent tank. It is preferable to have such a friction coefficient.

ここで、独立タンクと船体の構成について説明する。なお、本実施形態が適用される船舶は、例えばＬＰＧ（液化石油ガス）用タンカーやＬＮＧ（液化天然ガス）用タンカー等のように、外気温度に対して温度差のある積荷が貯蔵される独立タンクを搭載した船舶である。
図６は船体内部に独立タンクを搭載した独立型タンカーの概略図であり、（Ａ）は船体横方向の断面図で、（Ｂ）は船体長さ方向の断面図である。
上記したように独立型のタンカーにおいては、独立タンク５を船体９のタンク収容空間６内に搭載する。タンク収容空間６の側壁又は天井と独立タンク５との間にはホールドスペース７が形成され、ここにアンカー（図示略）が取り付けてある。アンカーは、航海中、船体が横方向に振れてローリングを起こしたような場合、その動きを止めるために設けられている。さらに、タンク収容空間６と独立タンク５との間のホールドスペース７には、独立タンク５の鉛直方向の荷重を受け止める支持構造１が設けられている。 Here, the configuration of the independent tank and the hull will be described. A ship to which the present embodiment is applied is an independent ship that stores a cargo having a temperature difference with respect to the outside air temperature, such as an LPG (liquefied petroleum gas) tanker or an LNG (liquefied natural gas) tanker. A ship equipped with a tank.
6A and 6B are schematic views of an independent tanker in which an independent tank is mounted inside the hull. FIG. 6A is a cross-sectional view in the horizontal direction of the hull, and FIG. 6B is a cross-sectional view in the length direction of the hull.
As described above, in the independent tanker, the independent tank 5 is mounted in the tank housing space 6 of the hull 9. A hold space 7 is formed between the side wall or ceiling of the tank housing space 6 and the independent tank 5, and an anchor (not shown) is attached thereto. The anchor is provided to stop the movement of the hull when it rolls in the lateral direction during rolling. Further, a support structure 1 that receives a load in the vertical direction of the independent tank 5 is provided in the hold space 7 between the tank housing space 6 and the independent tank 5.

図２は独立タンクの底面を示す図である。
独立タンク５の底面５１には、上記したように所定間隔を隔てて複数のタンク側支持台２が固設されている。すなわち、このタンク側支持台２の位置に支持構造１が配置されることとなる。
独立タンク５は、外気温度より低温又は高温の積荷が貯蔵されるため、積荷の積み下ろし時に熱伸縮する。本実施形態に係る独立タンク５は、独立タンク５の底面５１が、タンク収容空間６の底板９１（図６参照）に対して相対的に変位しない起点５０を中心として温度差により放射状に伸縮するように構成されている。これは、例えば底面５１に固定手段を設けて、固定手段により起点５０は固定され且つ他の底面部位は変位自在となる構成としてもよいし、底面５１のうち起点５０のみが変位しないように独立タンク５をタンク収容空間６上部から吊下固定する構成としてもよい。
図２は一例として、独立タンク５が空の状態で常温（外気温度と同一）である場合を示し、図中の矢印は、外気温度より低温の積荷をタンク内に積載したときに独立タンク５の底面５１が収縮する方向を示している。同図に示すように、独立タンク５の底面５１は、起点５０を中心として放射状に伸縮するようになっている。 FIG. 2 is a view showing the bottom surface of the independent tank.
As described above, a plurality of tank-side support bases 2 are fixed to the bottom surface 51 of the independent tank 5 at a predetermined interval. That is, the support structure 1 is disposed at the position of the tank side support base 2.
The independent tank 5 stores a load at a temperature lower or higher than the outside air temperature, and thus expands and contracts when the load is unloaded. In the independent tank 5 according to the present embodiment, the bottom surface 51 of the independent tank 5 expands and contracts radially due to a temperature difference around a starting point 50 that does not displace relative to the bottom plate 91 (see FIG. 6) of the tank housing space 6. It is configured as follows. For example, the fixing means may be provided on the bottom surface 51 so that the starting point 50 is fixed by the fixing means and the other bottom surface part can be displaced. Independently, only the starting point 50 of the bottom surface 51 is not displaced. It is good also as a structure which suspends and fixes the tank 5 from the tank accommodating space 6 upper part.
FIG. 2 shows, as an example, a case where the independent tank 5 is empty and at room temperature (same as the outside air temperature), and the arrows in the figure indicate the independent tank 5 when a load having a temperature lower than the outside air temperature is loaded in the tank. The direction which the bottom face 51 of this contracts is shown. As shown in the figure, the bottom surface 51 of the independent tank 5 is radially expanded and contracted around the starting point 50.

図１に戻り、タンク側支持台２の補強部材２３及び船体側支持台３の補強部材３３は、タンク側支持台２の荷重中心Ｐ１と船体側支持台３の荷重中心Ｐ２とが底面５１の伸縮により相互に偏心する偏心領域８を含む部位にそれぞれ設けられている。
独立タンク５が常温のときは、タンク側支持台２の荷重中心Ｐ１と船体側支持台３の荷重中心Ｐ２とは同一軸上に配置されている。ここで、独立タンク５内に積荷が積載されると独立タンク５が熱伸縮する。これにともない底面５１に固設されるタンク側支持台２は、例えば図１（Ｂ）の矢印方向にスライド移動する。そうするとタンク側支持台２の荷重中心Ｐ１と、船体側支持台３の荷重中心Ｐ２とがずれて偏心配置される。これによりタンク側支持台２及び船体側支持台３には偏心応力が発生する。 Returning to FIG. 1, the reinforcing member 23 of the tank side support base 2 and the reinforcing member 33 of the hull side support base 3 are such that the load center P1 of the tank side support base 2 and the load center P2 of the hull side support base 3 are It is provided in each part including the eccentric region 8 that is eccentric to each other by expansion and contraction.
When the independent tank 5 is at normal temperature, the load center P1 of the tank side support base 2 and the load center P2 of the hull side support base 3 are arranged on the same axis. Here, when a load is loaded in the independent tank 5, the independent tank 5 is thermally expanded and contracted. Along with this, the tank side support base 2 fixed to the bottom surface 51 slides in the direction of the arrow in FIG. 1B, for example. If it does so, the load center P1 of the tank side support stand 2 and the load center P2 of the hull side support stand 3 will shift | deviate and arrange eccentrically. As a result, an eccentric stress is generated in the tank side support base 2 and the hull side support base 3.

これに対して本実施形態においては、支持台２、３に補強部材２３、３３を設けているため、偏心荷重によるタンク側支持台２及び船体側支持台３への応力集中を緩和することができる。したがって、タンク側支持台２及び船体側支持台３の変形を防止でき安定して独立タンク５を支持可能な支持構造１とすることができる。また、補強部材２３、３３を設けることにより、偏心荷重対策として支持台２、３の板厚を厚くする必要がなくなり、支持構造１の重量増加を防止できる。   On the other hand, in this embodiment, since the reinforcing members 23 and 33 are provided on the support bases 2 and 3, stress concentration on the tank side support base 2 and the hull side support base 3 due to the eccentric load can be reduced. it can. Therefore, the support structure 1 that can prevent the tank-side support base 2 and the hull-side support base 3 from being deformed and can stably support the independent tank 5 can be provided. Further, by providing the reinforcing members 23 and 33, it is not necessary to increase the thickness of the support bases 2 and 3 as a measure against the eccentric load, and an increase in the weight of the support structure 1 can be prevented.

また、本第１実施形態においては、補強部材２３、３３がそれぞれ設けられたタンク側支持台２と船体側支持台３とを用いているため、独立タンク５は既存のものを用いることができる。
さらに、独立タンク５の底面５１は、船体９の底板９１に対して相対的に変位しない起点を中心として放射状に伸縮するように構成されているため、タンク側支持台２及び船体側支持台３の偏心領域８を容易に特定可能で、補強部材２３、３３を必要部位に確実に設置することができる。 In the first embodiment, since the tank side support base 2 and the hull side support base 3 provided with the reinforcing members 23 and 33 are used, the existing independent tank 5 can be used. .
Furthermore, since the bottom surface 51 of the independent tank 5 is configured to expand and contract radially from the starting point that does not displace relative to the bottom plate 91 of the hull 9, the tank side support base 2 and the hull side support base 3. The eccentric region 8 can be easily specified, and the reinforcing members 23 and 33 can be reliably installed at necessary portions.

さらにまた、本実施形態におけるタンク側支持台２及び船体側支持台３の好適な構成として、上記したように天板部２１、３１と、複数の平板部材からなる脚部２２、３２と、補強部材２３、３３とを含む構成としている。このとき脚部２２、３２を形成する複数の平板部材は、荷重中心軸を中心として放射状に配置されることとなる。さらに隣り合う平板部材同士の間に補強部材２３、３３を架設することにより、偏心荷重を荷重中心軸に軸力として伝達させることができ、荷重中心の偏心による応力を低減することが可能である。   Furthermore, as a preferable configuration of the tank side support base 2 and the hull side support base 3 in the present embodiment, as described above, the top plate portions 21 and 31, the leg portions 22 and 32 made of a plurality of flat plate members, and the reinforcement The members 23 and 33 are included. At this time, the plurality of flat plate members forming the leg portions 22 and 32 are arranged radially about the load center axis. Further, by installing the reinforcing members 23 and 33 between adjacent flat plate members, an eccentric load can be transmitted as an axial force to the load center axis, and stress due to the eccentricity of the load center can be reduced. .

次いで、図３を参照して、本発明の実施形態に係る独立タンクの支持構造の変形例を説明する。図３（Ａ）〜（Ｇ）のそれぞれにおいて上図は支持台の平面図で、下図は支持台の側面図である。なお、ここでは船体側支持台３について説明するが、タンク側支持台２についても同一の構成を採用することができる。
図３（Ａ）〜（Ｇ）において、船体側支持台３は、天板部３１と、複数の平板部材からなる脚部３２と、補強部材３３とを含む。脚部３２は、平板部材が十字に交差した形状を有している。すなわち、脚部３２は、荷重中心Ｐ２を中心として９０度間隔で４枚の平板部材が配置された構成となっている。 Next, with reference to FIG. 3, a modification of the independent tank support structure according to the embodiment of the present invention will be described. 3A to 3G, the upper diagram is a plan view of the support table, and the lower diagram is a side view of the support table. In addition, although the hull side support stand 3 is demonstrated here, the same structure is employable also about the tank side support stand 2. FIG.
3A to 3G, the hull-side support base 3 includes a top plate portion 31, leg portions 32 made of a plurality of flat plate members, and a reinforcing member 33. The leg portion 32 has a shape in which flat plate members intersect with a cross. That is, the leg portion 32 has a configuration in which four flat plate members are arranged at intervals of 90 degrees around the load center P2.

図３（Ａ）の支持構造は、船体側支持台３ａの補強部材３３ａが、荷重中心Ｐ２ａの周囲のうち偏心領域８（図１参照）を含むように部分的に設けられている。具体的には、円弧状の補強部材３３ａが、隣り合う平板部材の間に架設された構成となっている。これにより、偏心荷重による応力集中に対応した必要最低限の補強を行うとともに、支持構造の重量低減が可能となる。 The support structure in FIG. 3A is partially provided so that the reinforcing member 33a of the hull side support base 3a includes the eccentric region 8 (see FIG. 1) around the load center P2a. Specifically, the arc-shaped reinforcing member 33a is constructed between adjacent flat plate members . As a result, the minimum necessary reinforcement corresponding to the stress concentration due to the eccentric load is performed, and the weight of the support structure can be reduced.

また、この補強部材３３ａは、天板部３１ａから脚部３２ａの鉛直方向全長より短い位置まで設けられており、底板９１には接続されていない。これにより、補強部材３３ａを小型化することができ、支持構造の重量低減が可能となる。
さらに、この補強部材３３ａは、隣り合う平板部材間の中央部の方が該平板部材に接続される端部側より鉛直方向長さが短くなるように形成されている。すなわち、平板部材間の中央部において補強部材３３ａが一部切り欠かれた形状となっている。これは、船体側支持台３ａにおいて天板３１ａで受けた荷重は、補強部材３３ａから脚部３２ａの平板部材に伝達される。したがって、荷重の伝達に寄与しない平板部材間中央部の補強部材３３ａを端部側より短くすることにより、補強部材３３ａをより一層小型化することができ、支持構造のさらなる重量低減が可能となる。 Further, the reinforcing member 33a is provided from the top plate portion 31a to a position shorter than the entire length in the vertical direction of the leg portion 32a, and is not connected to the bottom plate 91. Thereby, the reinforcement member 33a can be reduced in size and the weight of the support structure can be reduced.
Further, the reinforcing member 33a is formed so as to vertically length from the end portion side toward the central portion is connected to said flat plate member between the adjacent flat plate member is shortened. That is, the reinforcing member 33a is partially cut out at the center between the flat plate members . This is because the load received by the top plate 31a in the hull side support base 3a is transmitted from the reinforcing member 33a to the flat plate member of the leg portion 32a. Therefore, by shortening the reinforcing member 33a in the central portion between the flat plate members that does not contribute to load transmission from the end side, the reinforcing member 33a can be further reduced in size, and the weight of the support structure can be further reduced. .

図３（Ｂ）の支持構造は、船体側支持台３ｂの補強部材３３ｂが円弧状に形成され、荷重中心Ｐ２ｂの周囲のうち偏心領域８（図１参照）を含むように部分的に設けられている。これにより支持構造１ｂの重量低減が可能となる。
また、この補強部材３３ｂは、天板部３１ｂから脚部３２ｂの鉛直方向全長に亘って設けられている。これにより補強部材３３ｂの上下端部が、天板部３１ｂと底板９１とにそれぞれ当接して天板部３１ｂを支持するため、荷重中心軸の他に補強部材３３ｂにおいても鉛直方向にタンク荷重を伝達することができ、より大きな偏心荷重にも対応可能となる。 The support structure of FIG. 3B is partially provided so that the reinforcing member 33b of the hull side support base 3b is formed in an arc shape and includes the eccentric region 8 (see FIG. 1) around the load center P2b. ing. As a result, the weight of the support structure 1b can be reduced.
The reinforcing member 33b is provided over the entire length in the vertical direction from the top plate portion 31b to the leg portion 32b. As a result, the upper and lower end portions of the reinforcing member 33b abut against the top plate portion 31b and the bottom plate 91 to support the top plate portion 31b. Therefore, in addition to the load center axis, the tank load is also applied vertically to the reinforcing member 33b. It can be transmitted and can cope with a larger eccentric load.

図３（Ｃ）の支持構造は、船体側支持台３ｃの補強部材３３ｃが荷重中心Ｐ２ｃの周囲全周に亘って円環状に設けられている。これにより、タンク底面５１の伸縮方向に対する補強部材３３ｃの位置を考慮する必要がなくなる。したがって、船体側支持台３ｃの取り付け作業が容易となる。
また、この補強部材３３ｃは、天板部３１ｃから脚部３２ｃの鉛直方向全長より短い位置まで設けられており、底板９１には接続されていない。これにより補強部材３３ｃを小型化することができ、支持構造の重量低減が可能となる。 In the support structure of FIG. 3C, the reinforcing member 33c of the hull side support base 3c is provided in an annular shape over the entire circumference of the load center P2c. This eliminates the need to consider the position of the reinforcing member 33c with respect to the expansion / contraction direction of the tank bottom surface 51. Therefore, it is easy to attach the hull side support base 3c.
Further, the reinforcing member 33c is provided from the top plate portion 31c to a position shorter than the full length in the vertical direction of the leg portion 32c, and is not connected to the bottom plate 91. Thereby, the reinforcing member 33c can be reduced in size, and the weight of the support structure can be reduced.

図３（Ｄ）の支持構造は、船体側支持台３ｄの補強部材３３ｄが荷重中心Ｐ２ｄの周囲全周に亘って円環状に設けられている。これにより、タンク底面５１の伸縮方向に対する補強部材３３ｄの位置を考慮する必要がなくなる。したがって、船体側支持台３ｄの取り付け作業が容易となる。
また、この補強部材３３ｄは、天板部３１ｄから脚部３２ｄの鉛直方向全長に亘って設けられている。したがって、より大きな偏心荷重にも対応可能となる。 In the support structure of FIG. 3D, the reinforcing member 33d of the hull side support base 3d is provided in an annular shape over the entire circumference of the load center P2d. This eliminates the need to consider the position of the reinforcing member 33d with respect to the expansion / contraction direction of the tank bottom surface 51. Therefore, the mounting work of the hull side support base 3d becomes easy.
The reinforcing member 33d is provided over the entire length in the vertical direction from the top plate portion 31d to the leg portion 32d. Therefore, it is possible to cope with a larger eccentric load.

図３（Ｅ）の支持構造は、船体側支持台３ｅの補強部材３３ｅが荷重中心Ｐ２ｅの周囲全周に亘って環状に設けられている。これにより船体側支持台３ｃの取り付け作業が容易となる。さらにこの補強部材３３ｅは平板形状を有しており、脚部３２の平板部材に対して４５度の角度で取り付けられ、全体として方形環状に形成されている。
また、この補強部材３３ｅは、天板部３１ｅから脚部３２ｅの鉛直方向全長より短い位置まで設けられており、底板９１には接続されていない。これにより補強部材３３ｅを小型化することができ、支持構造の重量低減が可能となる。 In the support structure of FIG. 3 (E), the reinforcing member 33e of the hull side support base 3e is provided in an annular shape over the entire circumference of the load center P2e. This facilitates the mounting operation of the hull side support base 3c. Further, the reinforcing member 33e has a flat plate shape, is attached to the flat plate member of the leg portion 32 at an angle of 45 degrees, and is formed in a rectangular ring shape as a whole.
Further, the reinforcing member 33e is provided from the top plate portion 31e to a position shorter than the entire length in the vertical direction of the leg portion 32e, and is not connected to the bottom plate 91. Thereby, the reinforcing member 33e can be reduced in size, and the weight of the support structure can be reduced.

図３（Ｆ）の支持構造は、船体側支持台３ｆの補強部材３３ｆが、荷重中心Ｐ２ｆの周囲に所定間隔を隔てて複数設けられている。具体的には、平板状の補強部材３３ｆが、荷重中心Ｐ２ｆを中心として放射状に設けられている。これにより船体側支持台３ｆの取り付け作業が容易となる。
また、この補強部材３３ｆは、天板部３１ｆから脚部３２ｆの鉛直方向全長より短い位置まで設けられており、底板９１には接続されていない。これにより補強部材３３ｆを小型化することができ、支持構造の重量低減が可能となる。 In the support structure of FIG. 3F, a plurality of reinforcing members 33f of the hull side support base 3f are provided around the load center P2f at a predetermined interval. Specifically, flat reinforcing members 33f are provided radially about the load center P2f. This facilitates the mounting operation of the hull side support base 3f.
Further, the reinforcing member 33f is provided from the top plate portion 31f to a position shorter than the entire length in the vertical direction of the leg portion 32f, and is not connected to the bottom plate 91. Thereby, the reinforcing member 33f can be reduced in size, and the weight of the support structure can be reduced.

図３（Ｇ）の支持構造は、船体側支持台３ｇの補強部材３３ｇが荷重中心Ｐ２ｇの周囲全周に亘って環状に設けられている。これにより船体側支持台３ｇの取り付け作業が容易となる。さらにこの補強部材３３ｇは９０度に屈曲した形状を有し、全体として方形環状に形成されている。
また、この補強部材３３ｆは、天板部３１ｆから脚部３２ｆの鉛直方向全長より短い位置まで設けられており、底板９１には接続されていない。これにより補強部材３３ｆを小型化することができ、支持構造の重量低減が可能となる。
なお、図３（Ｅ）〜図３（Ｇ）の支持構造においては、補強部材を荷重中心の周囲に部分的に設けていてもよいし、さらに天板部から脚部の鉛直方向全長に亘って設けていてもよい。 In the support structure of FIG. 3G, the reinforcing member 33g of the hull side support base 3g is provided in an annular shape around the entire circumference of the load center P2g. This facilitates the mounting operation of the hull side support base 3g. Further, the reinforcing member 33g has a shape bent at 90 degrees, and is formed in a rectangular ring shape as a whole.
Further, the reinforcing member 33f is provided from the top plate portion 31f to a position shorter than the entire length in the vertical direction of the leg portion 32f, and is not connected to the bottom plate 91. Thereby, the reinforcing member 33f can be reduced in size, and the weight of the support structure can be reduced.
In addition, in the support structure of FIG.3 (E)-FIG.3 (G), the reinforcement member may be provided partially in the circumference | surroundings of a load center, and also covers the vertical direction full length of a leg part from a top plate part. It may be provided.

（第２実施形態）
図４は本発明の第２実施形態に係る独立タンクの支持構造を示す側面図である。なお、以下の第２実施形態において、上記した第１実施形態と同一の構成についてはその詳細な説明を省略する。
本発明の第２実施形態に係る独立タンクの支持構造１’は、船体のタンク収容空間の底板９１に固設された複数の船体側支持台３’と、タンク底面５１と船体側支持台３’との間に介在された断熱性支持材４’とを有する。
船体側支持台３’の構成は、第１実施形態と同様であり、天板３１’と、脚部３２’と、補強部材３３’とを有している。
また、第１実施形態と同様に、独立タンク５の底面５１は、底板９１に対して相対的に変位しない起点を中心として温度差により放射状に伸縮するように構成されている。 (Second Embodiment)
FIG. 4 is a side view showing a support structure for an independent tank according to the second embodiment of the present invention. Note that in the following second embodiment, detailed description of the same configuration as that of the first embodiment described above will be omitted.
The independent tank support structure 1 ′ according to the second embodiment of the present invention includes a plurality of hull side support bases 3 ′ fixed to a bottom plate 91 of a tank housing space of the hull, a tank bottom surface 51, and a hull side support base 3. And a heat-insulating support material 4 ′ interposed therebetween.
The structure of the hull side support 3 'is the same as that of the first embodiment, and includes a top plate 31', a leg 32 ', and a reinforcing member 33'.
Similarly to the first embodiment, the bottom surface 51 of the independent tank 5 is configured to expand and contract radially due to a temperature difference around a starting point that is not displaced relative to the bottom plate 91.

この第２実施形態では、第１実施形態に示したタンク側支持台２を設けない構成としている。したがって断熱性支持材４’は、独立タンク５の底部内構材５２が位置する底面部位５１ａと、船体側支持台３’との間に介在される。さらに、底部内構材５２には、該底部内構材５２による底面支持点Ｐ３と、船体側支持台３’の荷重中心とが底面５１の伸縮により相互に偏心する偏心領域を含む部位に、タンク荷重に対して底部内構材５２を補強する補強部材２５が設けられている。底部内構材５２による底面支持点Ｐ３とは、底部内構材５２が接続されている底面位置の少なくとも一点であり、特に、複数の底部内構材５２が交差して底面５１のうち最も変形強度が高い点であることが好ましい。   In this 2nd Embodiment, it is set as the structure which does not provide the tank side support stand 2 shown in 1st Embodiment. Therefore, the heat insulating support material 4 ′ is interposed between the bottom surface portion 51 a where the bottom structuring material 52 of the independent tank 5 is located and the hull side support base 3 ′. Further, the bottom inner construction material 52 includes an eccentric region where the bottom surface support point P3 by the bottom inner construction material 52 and the load center of the hull side support base 3 ′ are eccentric to each other by expansion and contraction of the bottom surface 51, A reinforcing member 25 is provided to reinforce the bottom structural member 52 against the tank load. The bottom surface support point P3 by the bottom inner construction material 52 is at least one point of the bottom surface position to which the bottom inner construction material 52 is connected, and in particular, the plurality of bottom inner construction materials 52 intersect to form the most deformation of the bottom surface 51. It is preferable that the strength is high.

ここで、図５に底部内構材５２の斜視図を示す。底部内構材５２とは、独立タンク自体の補強を目的としてタンク底面５１より内側に設けられた構材（骨材を含む）である。底部内構材５２は、一般に横方向骨材と縦方向骨材とが交差した構成を有する。この底部内構材５２が交差した位置を底面部位５１ａとし、交差した点を底面支持点Ｐ３とすることが好ましい。その理由は、底部内構材５２が交差した位置が最も変形強度が高い点であるためである。   Here, FIG. 5 shows a perspective view of the bottom structural member 52. The bottom inner construction material 52 is a construction material (including aggregate) provided inside the tank bottom surface 51 for the purpose of reinforcing the independent tank itself. The bottom inner construction material 52 generally has a configuration in which a transverse aggregate and a longitudinal aggregate intersect each other. It is preferable that the position where the bottom inner structural material 52 intersects is a bottom surface portion 51a, and the intersecting point is a bottom surface support point P3. The reason for this is that the position where the bottom structural member 52 intersects is the point with the highest deformation strength.

このように本第２実施形態では、底部内構材５２及び船体側支持台３’に補強部材２５、３３’を設けた構成としている。この補強部材２５、３３’によって、偏心荷重による底面５１及び船体側支持台３’への応力集中を緩和することができる。したがって、タンク底面５１の変形を防止できるとともに、船体側支持台３’の変形を防止でき安定して独立タンク５を支持可能な支持構造１’とすることができる。また、補強部材２５、３３’を設けることにより、偏心荷重対策としてタンク底面５１や船体側支持台３’の板厚を厚くする必要がなくなり、タンク５や支持構造１’の重量増加を防止できる。   As described above, in the second embodiment, the reinforcing members 25 and 33 ′ are provided on the bottom inner structural member 52 and the hull side support base 3 ′. By the reinforcing members 25 and 33 ′, stress concentration on the bottom surface 51 and the hull side support base 3 ′ due to the eccentric load can be reduced. Therefore, it is possible to prevent the deformation of the tank bottom surface 51 and to prevent the deformation of the hull side support base 3 ′ and to provide a support structure 1 ′ that can stably support the independent tank 5. Further, by providing the reinforcing members 25 and 33 ′, it is not necessary to increase the thickness of the tank bottom surface 51 and the hull side support base 3 ′ as a measure against the eccentric load, and an increase in the weight of the tank 5 and the support structure 1 ′ can be prevented. .

また、本第２実施形態においては、独立タンク側には支持台を設けずに底部内構材５２に補強部材２５を設けた構成としているため、支持構造１’の重量低減や工数削減によるコスト低減が可能となる。
さらに、独立タンク５の底面５１は、船体９の底板９１に対して相対的に変位しない起点を中心として放射状に伸縮するように構成されているため偏心領域を容易に特定可能で、補強部材２５、３３’を必要部位に確実に設置することができる。 In the second embodiment, the support member 1 is not provided on the independent tank side, and the reinforcing member 25 is provided on the bottom construction material 52. Therefore, the cost of reducing the weight and man-hours of the support structure 1 'is reduced. Reduction is possible.
Furthermore, since the bottom surface 51 of the independent tank 5 is configured to radially expand and contract around a starting point that is not displaced relative to the bottom plate 91 of the hull 9, the eccentric region can be easily specified, and the reinforcing member 25. , 33 ′ can be reliably installed at a necessary site.

１、１’ 支持構造
２ タンク側支持台
３、３’、３ａ〜３ｇ 船体側支持台
４、４’ 断熱性支持材
５ 独立タンク
６ タンク収容空間
７ ホールドスペース
８ 偏心領域
９ 船体
２３ （タンク側）補強部材
３３、３３’、３３ａ〜３３ｇ （船体側）補強部材
５０ 起点
５１ 底面
９１ 底板
Ｐ１ （タンク側）荷重中心
Ｐ２、Ｐ２ａ〜Ｐ２ｇ （船体側）荷重中心
Ｐ３ （底部内構材側）底面支持点 DESCRIPTION OF SYMBOLS 1, 1 'support structure 2 Tank side support stand 3, 3', 3a-3g Hull side support stand 4, 4 'Thermal insulation support material 5 Independent tank 6 Tank accommodation space 7 Hold space 8 Eccentric area 9 Hull 23 (Tank side ) Reinforcing members 33, 33 ', 33a to 33g (Hull side) Reinforcing member 50 Starting point 51 Bottom surface 91 Bottom plate P1 (Tank side) Load center P2, P2a to P2g (Hull side) Load center P3 (Bottom inner construction material side) Bottom surface Support point

Claims (7)

外気温度に対して温度差のある積荷が貯蔵される独立タンクの支持構造であって、
前記独立タンクの底面に固設された複数のタンク側支持台と、船体のタンク収容空間の底板に固設された複数の船体側支持台と、前記タンク側支持台と前記船体側支持台との間に介在され、前記タンク側支持台及び前記船体側支持台の少なくとも一方と摺動自在に形成された断熱性支持材とを有する独立タンクの支持構造において、
前記独立タンクの底面は、前記底板に対して相対的に変位しない起点を中心として前記温度差により放射状に伸縮するように構成されており、
前記タンク側支持台及び前記船体側支持台にはそれぞれ、前記タンク側支持台の荷重中心と前記船体側支持台の荷重中心とが前記底面の伸縮により相互に偏心する偏心領域を含む部位に、タンク荷重に対して前記支持台を補強する補強部材が設けられ、
前記タンク側支持台及び前記船体側支持台は、前記断熱性支持材に面接触する天板部と、一側縁部が前記天板部に接続されるとともに該天板部に直交する荷重中心軸を通り且つ該荷重中心軸を中心として放射状に配置された複数の平板部材からなる脚部と、一側縁部が前記天板部に接続されるとともに前記荷重中心の周囲に周方向に設けられ隣り合う前記平板部材同士の間に架設された前記補強部材とを含むことを特徴とする独立タンクの支持構造。 An independent tank support structure for storing a load having a temperature difference with respect to the outside air temperature,
A plurality of tank side support bases fixed to the bottom surface of the independent tank; a plurality of hull side support bases fixed to the bottom plate of the tank housing space of the hull; the tank side support base and the hull side support base; In an independent tank support structure having a heat-insulating support material slidably formed on at least one of the tank-side support base and the hull-side support base.
The bottom surface of the independent tank is configured to radially expand and contract due to the temperature difference around a starting point that does not displace relative to the bottom plate,
Each of the tank-side support base and the hull-side support base includes an eccentric region in which the load center of the tank-side support base and the load center of the hull-side support base are mutually eccentric due to expansion and contraction of the bottom surface, A reinforcing member is provided to reinforce the support base against tank load ,
The tank side support base and the hull side support base include a top plate portion that is in surface contact with the heat insulating support material, and a load center that is connected to the top plate portion with one side edge portion orthogonal to the top plate portion. A leg portion composed of a plurality of flat plate members arranged radially with the load center axis as a center, and one side edge portion connected to the top plate portion and provided in a circumferential direction around the load center A support structure for an independent tank, comprising: the reinforcing member provided between the adjacent flat plate members . 外気温度に対して温度差のある積荷が貯蔵される独立タンクの支持構造であって、
船体のタンク収容空間の底板に固設された複数の船体側支持台と、前記独立タンクの底部内構材が位置する底面部位と前記船体側支持台との間に介在され、前記底面部位及び前記船体側支持台の少なくとも一方と摺動自在に形成された断熱性支持材とを有する独立タンクの支持構造において、
前記独立タンクの底面は、前記底板に対して相対的に変位しない起点を中心として前記温度差により放射状に伸縮するように構成されており、
前記底部内構材及び前記船体側支持台にはそれぞれ、前記底部内構材による底面支持点と前記船体側支持台の荷重中心とが前記底面の伸縮により相互に偏心する偏心領域を含む部位に、タンク荷重に対して前記底部内構材又は前記船体側支持台を補強する補強部材が設けられ、
前記船体側支持台は、前記断熱性支持材に面接触する天板部と、一側縁部が前記天板部に接続されるとともに該天板部に直交する荷重中心軸を通り且つ該荷重中心軸を中心として放射状に配置された複数の平板部材からなる脚部と、一側縁部が前記天板部に接続されるとともに前記荷重中心の周囲に周方向に設けられ隣り合う前記平板部材同士の間に架設された前記補強部材とを含むことを特徴とする独立タンクの支持構造。 An independent tank support structure for storing a load having a temperature difference with respect to the outside air temperature,
A plurality of hull-side support bases fixed to a bottom plate of a tank housing space of the hull, and a bottom surface portion where the bottom internal construction material of the independent tank is located and the hull-side support base, In the support structure of the independent tank having at least one of the hull side support base and a heat insulating support material slidably formed,
The bottom surface of the independent tank is configured to radially expand and contract due to the temperature difference around a starting point that does not displace relative to the bottom plate,
Each of the bottom inner construction material and the hull side support base includes an eccentric region in which a bottom surface support point by the bottom inner construction material and a load center of the hull side support base are eccentric from each other by expansion and contraction of the bottom surface. A reinforcing member is provided to reinforce the bottom inner construction material or the hull side support base against tank load ,
The hull-side support base has a top plate portion that is in surface contact with the heat insulating support material, and one side edge portion is connected to the top plate portion and passes through a load center axis orthogonal to the top plate portion and the load. Legs composed of a plurality of flat plate members arranged radially about a central axis, and the flat plate members having one side edge portion connected to the top plate portion and provided circumferentially around the load center and adjacent to each other A support structure for an independent tank, comprising the reinforcing member laid between each other . 前記補強部材は、前記荷重中心の周囲のうち前記偏心領域を含むように部分的に設けられていることを特徴とする請求項１又は２に記載の独立タンクの支持構造。   The independent tank support structure according to claim 1, wherein the reinforcing member is partially provided so as to include the eccentric region around the load center. 前記補強部材は、前記荷重中心の周囲全周に亘って設けられていることを特徴とする請求項１又は２に記載の独立タンクの支持構造。   The independent tank support structure according to claim 1, wherein the reinforcing member is provided over the entire circumference of the load center. 前記補強部材は、前記天板部から前記脚部の鉛直方向全長に亘って設けられていることを特徴とする請求項１又は２に記載の独立タンクの支持構造。 The reinforcing member, the support structure independent tank according to claim 1 or 2, characterized in that provided over the vertical length of the leg from the top plate. 前記補強部材は、前記天板部から前記脚部の鉛直方向全長より短い位置まで設けられていることを特徴とする請求項１又は２に記載の独立タンクの支持構造。 The reinforcing member, the support structure independent tank according to claim 1 or 2, characterized in that it is provided from the top plate portion to the shorter position than the vertical length of the leg. 前記補強部材は、隣り合う前記平板部材間の中央部の方が該平板部材に接続される端部側より鉛直方向長さが短くなるように形成されていることを特徴とする請求項６に記載の独立タンクの支持構造。
The reinforcing member to claim 6 towards the central portion between the adjacent flat plate member, characterized in that the vertical length from the end side connected to said flat plate member is formed to be shorter Support structure for the described independent tank.
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