JP2016104584A - Tank support structure and ship - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tank support structure and a ship that excel in thermal insulation performance and strength, while suppressing a manufacturing cost, and can follow deformation caused by load fluctuation.SOLUTION: A tank support structure comprises a plurality of first support parts 3 arranged on the inner surface of a hold 11, a plurality of second support parts 4 arranged on the surface of a tank 2 corresponding to the first support parts 3, and support blocks 5 arranged between the first support parts 3 and the second support parts 4. The support block 5 has a box body 51 that is configured to be extendable and contractable between the first support part 3 and the second support part 4 and forms a closed space, and a porous block 52 received inside the box body 51 and arranged between the first support part 3 and the second support part 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tank support structure and a ship, and particularly to a tank support structure suitable for a low temperature tank such as an LNG tank and a ship provided with the tank support structure.

  In ships (including offshore floating facilities) equipped with tanks (hereinafter referred to as “cold tanks”) for storing low-temperature liquids such as LPG (liquefied petroleum gas) and LNG (liquefied natural gas), the low-temperature tank is removed from the hull. The thing of the independent tank system arrange | positioned in the independent state is used widely (for example, refer patent document 1 and patent document 2). By adopting an independent tank system, it is possible to cope with expansion and contraction of the cryogenic tank accompanying changes in the amount of cryogenic liquid stored, and it is possible to reduce the amount of vaporization of cryogenic liquid by suppressing heat input to the cryogenic tank. .

  Here, the invention described in Patent Document 1 aims to equalize the load on the hull during navigation by avoiding the concentration of the load generated at the end of the low temperature tank. The reaction force is distributed. Further, the invention described in Patent Document 2 aims to prevent deterioration of heat insulation performance due to liquefaction of air or the like, and a vacuum vessel that forms a vacuum region on the outer periphery of the low temperature tank, and an inertness on the outer periphery of the vacuum vessel An inert gas container that forms a gas region is disposed to support the tank within the vacuum container.

JP 2000-177681 A JP-A-8-295394

  By the way, the hull of a ship is always flexed dynamically and greatly due to the influence of waves and the like. In addition, since the hull is tilted due to shaking or the like, the load on the support base that supports the low-temperature tank always fluctuates. Therefore, it is important that the support of the low temperature tank mounted on the ship softly accepts the deformation and load fluctuation of the hull and suppresses heat input from the hull to the tank as much as possible in order to maintain the low temperature of the low temperature tank. .

  In addition, the low temperature tank expands and contracts due to the low temperature liquid stored, but because the linear expansion coefficient of the steel plate constituting the hull that is in a normal temperature atmosphere is small, if the tank support structure is fixed, the low temperature tank And the support structure will be damaged. Therefore, the tank support structure is required to slide on the tank side or the hull side.

  Therefore, a dynamic shear force acts on the tank support structure in addition to the dynamic compressive load for supporting the tank weight and the shaking load. Since these loads are very large, the support base is required to have high compressive strength and shear strength. On the other hand, since the hull and the low temperature tank bend statically or dynamically, if a rigid tank support structure is adopted, the load may concentrate on the tank support structure arranged at a specific location. is there. That is, the tank support structure is required to have a large strength and at the same time have an appropriate softness. For this reason, in the conventional tank support structure, as described in Patent Document 1, for example, wood and resin having relatively high thermal resistance are used to satisfy the demand.

  Moreover, the low temperature tank has a property that stored low temperature liquid such as LNG is easily vaporized by heat input from the outside. This vaporized gas is generally called boil-off gas (BOG). Although BOG can be effectively used as a fuel for a turbine of a ship, when the amount of vaporization is large, it can only be thrown out or re-liquefied using a great deal of energy. In order to suppress the generation of this BOG, it is common practice to cover the outer periphery of the low temperature tank with a heat insulating material, but a large amount of heat also enters the low temperature tank from the tank support structure that supports the low temperature tank. .

  As described in Patent Document 2, it is possible to suppress heat input from the tank support structure by forming a vacuum region and an inert gas region on the entire outer periphery of the low-temperature tank. However, in such an invention, a vacuum container and an inert gas container are disposed inside the hull, and a mechanism for holding the vacuum region and the inert gas region is required, so that the structure is complicated and the manufacturing cost is reduced. There was a problem that would become expensive.

  The present invention was devised in view of the above-described problems, and has a tank support structure and a ship that are excellent in heat insulation performance and strength, and that can follow deformation due to load fluctuations while suppressing manufacturing costs. The purpose is to provide.

  According to the present invention, in the tank support structure that supports the tank accommodated in the hold in an independent state from the hull, the plurality of first support portions arranged on the inner surface of the hold and the first support portion corresponding to the first support portion A plurality of second support portions disposed on a surface of the tank; and a support block disposed between the first support portion and the second support portion, wherein the support block includes the first support portion. There is provided a tank support structure characterized by having a box that is configured to be extendable and contractable between the first support portion and the second support portion and that forms a closed space.

  According to the present invention, in the ship having a tank support structure for supporting a tank accommodated in the hold in a state independent from the hull, the tank support structure includes a plurality of first support portions arranged on the inner surface of the hold. And a plurality of second support portions disposed on the surface of the tank corresponding to the first support portion, and a support block disposed between the first support portion and the second support portion. The ship is characterized in that the support block includes a box that is configured to be extendable and contractable between the first support part and the second support part and that forms a closed space.

  In the tank support structure and the ship described above, the support block has a porous block that is accommodated inside the box and is disposed between the first support portion and the second support portion. Also good.

  The closed space may be a negative pressure region or a low heat conductive gas atmosphere. Here, the low thermal conductivity gas means a gas having lower thermal conductivity than air.

  Further, the box body is disposed between the first flat plate disposed on the first support portion side, the second flat plate disposed on the second support portion side, and the first flat plate and the second flat plate. And a side surface portion that is connected and includes a flexible body.

  The porous block is made of, for example, wood, resin, foam metal, or foam ceramic.

  Further, one of the first support part or the second support part is configured to be able to lock the support block, and the other of the first support part or the second support part is slidable to the support block. It may be configured.

  The first support part and the second support part may be configured to be able to lock the support block.

  The box may have a gas adsorbent arranged in the closed space.

  A plurality of the tanks are arranged adjacent to each other in the hold, and are arranged on a side surface of the other tank facing the one tank and a plurality of third support portions arranged on a side surface of the one tank. A plurality of fourth support portions, and the support block may be disposed between the third support portion and the fourth support portion.

  According to the tank support structure and the ship according to the present invention described above, the support block is formed by the box that forms the closed space, so that the space between the first support portion on the hull side and the second support portion on the tank side is between. A gas heat insulation layer can be formed and the heat insulation performance can be improved. Further, by forming the box using a material (metal, resin, etc.) excellent in heat insulation and strength, it is possible to improve heat insulation performance and strength while suppressing manufacturing costs. Further, by configuring the box so that it can be extended and contracted, it is possible to follow deformation caused by load fluctuations based on hull shaking or tank weight. In addition, by improving the heat insulating performance of the tank support structure, the heat insulating material covering the outer periphery of the tank can be changed to an inexpensive material, or the thickness of the heat insulating material can be reduced by reducing the thickness. You can also.

  Moreover, the intensity | strength of a support block can be improved more, maintaining heat insulation performance by arrange | positioning a porous block inside a box. Moreover, heat insulation performance can be improved more by making the closed space of a box into a negative pressure, or making it a low heat conductive gas atmosphere. In addition, by configuring either the first support part or the second support part to be slidable, the tank and the hull are configured to be relatively movable even when the cargo stored in the tank is a low-temperature liquid. And can easily cope with expansion and contraction of the tank due to the low-temperature liquid.

It is a figure which shows the tank support structure which concerns on 1st embodiment of this invention, (A) is a longitudinal cross-sectional view, (B) is BB sectional drawing in FIG. 1 (A), (C) is a side surface of a box. FIG. It is a figure which shows the ship provided with the tank support structure shown to FIG. 1 (A), (A) is a longitudinal cross-sectional view, (B) shows the BB cross-sectional arrow view in FIG. 2 (A). Yes. It is a top view of the support part shown to FIG. 1 (A), (A) has shown the 1st support part, (B) has shown the 2nd support part. It is a figure which shows the effect | action of the tank support structure which concerns on 1st embodiment, (A) is the state compressed, (B) is the state inclined in one direction, (C) shows the state distorted in the horizontal direction. ing. It is a figure which shows the tank support structure which concerns on other embodiment of this invention, (A) is 2nd embodiment, (B) is 3rd embodiment, (C) is 4th embodiment, (D) is 1st embodiment. The fifth embodiment, (E) shows the sixth embodiment, and (F) shows the seventh embodiment. It is a figure which shows the tank support structure which concerns on other embodiment of this invention, (A) has shown 8th embodiment, (B) has shown 93rd embodiment.

  Hereinafter, the tank support structure and ship which concern on embodiment of this invention are demonstrated using FIG. 1 (A)-FIG. 6 (B). Here, FIG. 1 is a figure which shows the tank support structure which concerns on 1st embodiment of this invention, (A) is a longitudinal cross-sectional view, (B) is BB sectional drawing in FIG. C) shows a side view of the box. 2A and 2B are views showing a ship provided with the tank support structure shown in FIG. 1A, wherein FIG. 2A is a longitudinal sectional view, and FIG. 2B is a sectional view taken along the line BB in FIG. , Shows. FIGS. 3A and 3B are plan views of the support portion shown in FIG. 1A, where FIG. 3A shows the first support portion and FIG. 3B shows the second support portion.

  The tank support structure according to the first embodiment of the present invention is a tank support structure that supports the tank 2 accommodated in the hold 11 in a state independent from the hull of the ship 1, and is a plurality of tanks arranged on the inner surface of the hold 11. The first support part 3, the plurality of second support parts 4 arranged on the surface of the tank 2 corresponding to the first support part 3, and the first support part 3 and the second support part 4. A support block 5, and the support block 5 is configured to be extendable and contractable between the first support portion 3 and the second support portion 4 and forms a closed space. And a porous block 52 disposed between the first support part 3 and the second support part 4.

  For example, as shown in FIGS. 2A and 2B, the ship 1 has a hold 11 that houses the tank 2 in a substantially central portion of the hull. A tank cover 12 covering the accommodated tank 2 is disposed on the upper part of the hold 11. The outer shell of the hull is configured by, for example, a double bulkhead, but is not limited to such a configuration. The ship 1 in this embodiment has a tank support structure that supports the tank 2 accommodated in the hold 11 in a state independent of the hull.

  The tank 2 stores a low-temperature liquid such as LPG (liquefied petroleum gas) or LNG (liquefied natural gas). Here, the case where three tanks 2 are accommodated is illustrated, but the number of tanks 2 can be arbitrarily set according to the size of the ship 1 and the size of the tank 2.

  In addition, as shown in the figure, the tank 2 may be arranged so that the three tanks 2 are adjacent to each other in the hold 11, but a partition wall is provided between the tanks 2 to divide the storage space for each tank 2. You may do it. When a partition is installed in the hold 11, it is preferable to dispose the support block 5 between the tank 2 and the partition. When the support block 5 is disposed on the partition wall, the same configuration as the tank support structure disposed between the side surface portion of the hold 11 and the side surface portion of the tank 2 can be employed.

  As shown in FIGS. 2A and 2B, a plurality of support blocks 5 are arranged on the bottom surface of the hold 11 in the length direction and width direction of the hull, and the load generated in the vertical direction of the tank 2. Support. A plurality of support blocks 5 are arranged on the surface of the side surface of the hold 11 in the width direction and the vertical direction of the hull, and support the load in the length direction and the width direction of the tank 2. 2A and 2B, illustration of the first support part 3 and the second support part 4 is omitted for convenience of explanation.

  As shown in FIG. 1A, the first support portion 3 is disposed on the bottom surface of the hold 11. The first support portion 3 is a pedestal that protrudes upward from the bottom surface of the hold 11 and has a flat upper surface. The 1st support part 3 may be comprised by components different from a hull, may be fixed with welding, a bolt, etc., and may be formed by changing the steel plate which comprises the hold 11. In addition, when making the 1st support part 3 into a different part from the hold 11, the 1st support part 3 is the resin which has the same raw material as the steel plate which comprises the bottom part of the hold 11, or the substantially same linear expansion coefficient, for example. Consists of.

  Moreover, the 1st support part 3 is arranged in a grid | lattice form in the length direction (X direction) and the width direction (Y direction) of the bottom part surface of the hold 11, for example, as shown to FIG. 3 (A). . In FIG. 3A, for convenience of explanation, a part of the bottom surface of the hold 11 is illustrated by a two-dot chain line.

  As shown in FIG. 1A, the second support portion 4 is disposed on the lower surface of the tank 2. The second support portion 4 is a frame having a recess 41 that protrudes downward from the lower surface of the tank 2 and into which the support block 5 can be inserted. When the support block 5 is a hexahedron such as a cube or a rectangular parallelepiped, the second support portion 4 is configured by a rectangular frame so as to conform to the outer shape of the support block 5. Of course, when the support block 5 has a cylindrical shape, the support block 5 is constituted by a circular frame.

  The second support portion 4 may be constituted by a part different from the tank 2 and may be fixed by welding, bolts, or the like, or a metal plate (for example, a steel plate, an aluminum plate, etc.) constituting the tank 2 is deformed. You may make it form. In addition, when making the 2nd support part 4 into another components with the tank 2, it is comprised with the resin which has the same raw material as the metal which comprises the tank 2, or a substantially the same linear expansion coefficient.

  Further, for example, as shown in FIG. 3 (B), the second support portion 4 is arranged in a lattice pattern in the length direction (X direction) and the width direction (Y direction) of the hull on the lower surface of the tank 2. Is done. Further, each second support portion 4 is formed at a position corresponding to each first support portion 3 when the tank 2 is accommodated in the hold 11. In addition, when the tank 2 is a low temperature tank, you may make it arrange | position the heat insulating material 21 in the outer periphery of the 2nd support part 4, as shown to FIG. 1 (A).

  For example, as shown in FIGS. 1A to 1C, the box 51 constituting the support block 5 includes a first flat plate 51 a disposed on the first support portion 3 side and a second support portion 4 side. And a side plate 51c connected between the first flat plate 51a and the second flat plate 51b and including a flexible body.

  As illustrated, the box 51 has a substantially hexahedron shape, and the first flat plate 51a and the second flat plate 51b are formed in a rectangular shape such as a square or a rectangle. The box body 51 may have a cylindrical shape. In this case, the first flat plate 51a and the second flat plate 51b are formed in a circular shape. The side surface portion 51c has, for example, a flexible body formed of a bellows or the like at an intermediate portion in the vertical direction. As described above, by arranging the flexible body on the side surface portion 51c, the box body 51 is not only capable of expanding and contracting in the vertical direction, but also can be distorted obliquely in the length direction and width direction of the hull.

  Further, the box 51 has a closed space (cavity) formed by the first flat plate 51a, the second flat plate 51b, and the side surface portion 51c. A gas heat insulating layer (specifically, an air heat insulating layer) can be formed by making the inside of the box 51 hollow. Further, by making this closed space a negative pressure region, the degree of vacuum can be increased and the heat insulation performance can be improved. For example, the vacuum degree of the internal closed space can be increased by forming the box body 51 by using electron beam welding or the like that can be welded in an environment close to a vacuum. In addition, after forming the box 51, the inside may be evacuated through the through hole and then the through hole may be closed.

  In addition, as shown in FIG. 1A, a gas adsorbent 51d such as silica gel may be disposed inside the box 51 (closed space). By disposing such a gas adsorbent 51d, it is possible to adsorb gas generated from the porous block 52 over time, and to maintain the internal vacuum for a long period of time. The material and amount of the gas adsorbent 51d can be arbitrarily designed according to the material of the support block 5 and the service life.

  Further, the closed space (cavity) of the box body 51 is filled with a gas having a lower thermal conductivity than air (for example, alternative chlorofluorocarbon, carbon dioxide, hydrocarbons, etc.) and enclosed, so that the closed space has a low thermal conductivity. A gas atmosphere may be used. In this case, the inside (closed space) of the box body 51 can be set to a pressure of about normal pressure (1 atm), and the strength required for the box body 51 is reduced compared to the case where the closed space is evacuated. The design conditions can be relaxed.

  The porous block 52 is formed of, for example, a wooden hexahedron. The porous block 52 is preferably in contact with the inner surfaces of the first flat plate 51 a and the second flat plate 51 b of the box 51 and has a strength capable of supporting the load of the tank 2. Further, since the porous block 52 is in contact with the box body 51 and the box body 51 is in contact with the first support portion 3 and the second support portion 4 of the hold 11, the hull, the tank 2 and the tank 2 are connected via the porous block 52. There is a possibility of heat transfer between. Therefore, the porous block 52 is made of, for example, wood having a large thermal resistance. The wooden porous block 52 may be constituted by a single plate or a plywood.

  In addition, wood generally has the same properties as porous materials. That is, the porous block 52 in the present embodiment only needs to have a porous property similar to that of dry wood. The porous material has a plurality of continuous pores, and it is difficult to store air inside. Therefore, when the inside (closed space) of the box 51 is evacuated, the air present in the porous block 52 can also be discharged to the outside of the box 51, and the heat insulation performance of the porous block 52 is further improved. Can be made. The porous block 52 is not limited to wood, and may be made of resin having similar properties, or may be made of foam metal or foam ceramic.

  For example, as shown in FIG. 1A, the support block 5 described above is locked to the recess 41 of the frame body constituting the second support portion 4, and the lower portion is placed on the upper surface of the first support portion 3. Placed. Therefore, the support block 5 slides on the first support portion 3 as the tank 2 expands and contracts. That is, the 2nd support part 4 is comprised so that the support block 5 can be latched, and the 1st support part 3 is comprised so that the support block 5 can be slid.

  Here, FIG. 4 is a figure which shows the effect | action of the tank support structure which concerns on 1st embodiment, (A) is the state compressed, (B) is the state inclined in one direction, (C) is a horizontal direction Shows a distorted state. In the tank support structure including the support block 5 described above, as shown in FIG. 4A, the load when the tank 2 is accommodated in the hold 11 and when cargo is stored in the tank 2 is supported by the support block 5. Can be held by. At this time, the support block 5 is normally in a compressed state.

  When the hull is shaken by waves or the like, or the cargo in the tank 2 is sloshing, the tank 2 is inclined in one direction as shown in FIG. As shown in C), the tank 2 is expected to slide in one direction. Further, when the cryogenic liquid is stored in the tank 2, as shown in FIG. 4C, the tank 2 expands and contracts and slides in one direction relative to the hull. Even when these phenomena occur, by using the support block 5 described above, the support block is deformed according to the posture of the tank 2, and dynamic compressive load and dynamic shear force generated in the tank support structure. Can withstand.

  Next, a tank support structure according to another embodiment of the present invention will be described with reference to FIGS. 5 (A) to 6 (B). Here, FIG. 5 is a figure which shows the tank support structure which concerns on other embodiment of this invention, (A) is 2nd embodiment, (B) is 3rd embodiment, (C) is 4th embodiment. Mode, (D) shows the fifth embodiment, (E) shows the sixth embodiment, and (F) shows the seventh embodiment. FIG. 6 is a view showing a tank support structure according to another embodiment of the present invention, in which (A) shows the eighth embodiment and (B) shows the 93rd embodiment. In addition, about the component same as the tank support structure which concerns on 1st embodiment mentioned above, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  In the tank support structure according to the second embodiment shown in FIG. 5A, the first support portion 3 is formed in the same configuration as the second support portion 4 in the first embodiment, and the second support portion 4 is the first support portion. It is formed in the same configuration as the first support part 3 in the embodiment. Therefore, in this embodiment, the 1st support part 3 comprises the frame which has the recessed part 31, and the 2nd support part 4 comprises the base. That is, in this embodiment, the 1st support part 3 is comprised so that the support block 5 can be latched, and the 2nd support part 4 is comprised so that the support block 5 can be slid.

  The tank support structure according to the third embodiment shown in FIG. 5B is obtained by locking the porous block 52 to the box body 51. For example, the porous block 52 can be locked to the box 51 by forming the recess 51e into which the porous block 52 can be fitted on the inner surfaces of the first flat plate 51a and the second flat plate 51b. With this configuration, the porous block 52 can be positioned with respect to the box 51, and the positional deviation of the porous block 52 within the box 51 can be suppressed. The method for locking the porous block 52 is not limited to the above-described method. For example, the porous block 52 is engaged by inserting bolts or pins from the outside of the first flat plate 51a and the second flat plate 51b. The method of stopping and the method of adhere | attaching the contact surface of the inner surface of the 1st flat plate 51a and the 2nd flat plate 51b, and the porous block 52 may be sufficient.

  The tank support structure according to the fourth embodiment shown in FIG. 5C is obtained by omitting the porous block 52 in the first embodiment. That is, the support block 5 in this embodiment is formed only by the box body 51. In this case, since it is necessary to support the dynamic compressive load and dynamic shear force generated in the tank support structure only by the box 51, the box 51 in the second embodiment is the box in the first embodiment described above. Preferably, it is formed with a strength higher than 51.

  In the tank support structure according to the fifth embodiment shown in FIG. 5D, the side surface portion 51c constituting the box 51 is formed by the resin layer 51f constituting the outer shell and the metal disposed inside the resin layer 51f. And the layer 51g. The metal material is excellent in sealing properties as compared with the resin material, but is inferior in heat insulating properties, and the resin material is excellent in heat insulating properties as compared with the metal material, but is inferior in sealing properties (the resin material has gas permeability). ). Accordingly, the strength as the box 51 is maintained by the resin layer 51f having a relatively high heat insulating property, and the thickness of the metal layer 51g having a relatively low heat insulating property is reduced as much as possible, so that the heat insulating property, strength, and sealing property are reduced. Can be formed. The metal layer 51g can be bonded to the resin layer 51f by various methods such as vapor deposition and adhesion.

  In the tank support structure according to the sixth embodiment shown in FIG. 5E, the first support portion 3 is arranged on the side surface of the hold 11 and the second support portion 4 is arranged on the side surface of the tank 2. Is. In this case, in order to position the porous block 52 in the box 51, the fixing member 51h such as a bolt or a pin is inserted from the outside of the first flat plate 51a and the second flat plate 51b to lock the porous block 52. It is preferable to do. By using such a fixture 51h, it is possible to suppress the dropout of the porous block 52 even when the distance between the first flat plate 51a and the second flat plate 51b is greatly widened. In addition, you may make it the porous block 52 latch by the recessed part 51e like 3rd embodiment shown to FIG. 5 (B).

  In the tank support structure according to the seventh embodiment shown in FIG. 5 (F), a plurality of tanks 2 are arranged adjacent to each other in the hold 11, and a third support part is arranged on the side surface of one tank 2. 6 and a fourth support portion 7 disposed on the side surface of the other tank 2 ′ facing the one tank 2, and the support block 5 is interposed between the third support portion 6 and the fourth support portion 7. It is arranged. The tank support structure according to this embodiment is disposed, for example, between the tanks 2 shown in FIGS. 2 (A) and 2 (B), and as shown in the drawing, a plurality of support blocks 5 are provided in the width direction and the vertical direction of the hull. Be placed. 2A and 2B, the illustration of the third support portion 6 and the fourth support portion 7 is omitted for convenience of explanation.

  The third support portion 6 in the present embodiment corresponds to the first support portion 3 in the first embodiment, and the fourth support portion 7 in the present embodiment corresponds to the second support portion 4 in the first embodiment. Therefore, the 3rd support part 6 comprises the base which supports the support block 5 so that sliding is possible, and the 4th support part 7 comprises the frame which has the recessed part 71 which can latch the support block 5. FIG. Moreover, the porous block 52 in this embodiment is latched by the 1st flat plate 51a and the 2nd flat plate 51b with the fixing tool 51h similarly to 6th embodiment mentioned above, for example.

  The tank support structure according to the eighth embodiment shown in FIG. 6A is obtained by locking the support block 5 to both the first support part 3 and the second support part 4. In the first embodiment to the seventh embodiment described above, it is assumed that the tank 2 is a low temperature tank, but the relative movement between the tank 2 and the hold 11 is small or the tank 2 is other than the low temperature tank. As described above, it may not be necessary to slide the support block 5 on the support portion. In such a case, as illustrated, the support block 5 may be locked to both the first support portion 3 and the second support portion 4. Also in the present embodiment, the box body 51 has the side surface portion 51c configured to be extendable and contractible, and the porous block 52 has appropriate flexibility, so that FIGS. ).

  The tank support structure according to the ninth embodiment shown in FIG. 6B is the same as the tank support structure shown in the seventh embodiment shown in FIG. The four support portions 7 are engaged with each other. Since other configurations are the same as those in the seventh embodiment and the eighth embodiment described above, detailed description thereof is omitted here.

  In the second embodiment to the ninth embodiment shown in FIG. 5A to FIG. 6B described above, the degree of vacuum inside the box body 51 (closed space) is increased as in the first embodiment. It may be a negative pressure region, a gas adsorbent may be arranged, or the inside (closed space) of the box 51 may be a low heat conductive gas atmosphere.

  According to the tank support structure and the ship according to the present embodiment described above, the support block 5 is formed by the box body 51 that forms a closed space, so that the first support portion 3 on the hull side and the second support on the tank 2 side. A gas heat insulating layer can be formed between the portion 4 and the heat insulating performance can be improved. Moreover, by forming the box 51 using a material (metal, resin, etc.) excellent in heat insulation and strength, it is possible to improve heat insulation performance and strength while suppressing manufacturing costs.

  Further, by configuring the box body 51 so as to be extendable and contractible, it is possible to follow deformation caused by load fluctuations based on hull shaking, tank weight, and the like. In addition, by improving the heat insulating performance of the tank support structure, the amount of the heat insulating material 21 used can be reduced by changing the material of the heat insulating material 21 covering the outer periphery of the tank 2 to an inexpensive material or by reducing the thickness. You can also do it.

  Further, by disposing the porous block 52 inside the box 51, the strength of the support block 5 can be further improved while maintaining the heat insulating performance. Moreover, heat insulation performance can be improved more by making the closed space of the box 51 into a negative pressure, or making it a low heat conductive gas atmosphere. In addition, by configuring one of the first support part 3 and the second support part 4 to be slidable, even if the cargo stored in the tank 2 is a low-temperature liquid, the tank 2 and the hull are relatively moved. It is possible to configure, and it is possible to easily cope with expansion and contraction of the tank 2 by the low temperature liquid.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention, for example, the present invention can be applied to tanks other than the low temperature tank.

DESCRIPTION OF SYMBOLS 1 Ship 2,2 'Tank 3 1st support part 4 2nd support part 5 Support block 6 3rd support part 7 4th support part 11 Ship 12 Tank cover 21 Heat insulating material 31, 41 Recess 51 Box 51a First flat plate 51b Second flat plate 51c Side surface 51d Gas adsorbent 51e Recess 51f Resin layer 51g Metal layer 51h Fixing tool 52 Porous block 71 Recess

According to the present invention, in the tank support structure that supports the tank accommodated in the hold in an independent state from the hull, the plurality of first support portions arranged on the inner surface of the hold and the first support portion corresponding to the first support portion A plurality of second support portions disposed on a surface of the tank; and a support block disposed between the first support portion and the second support portion, wherein the support block includes the first support portion. There is provided a tank support structure characterized in that it has a box that is configured to be extendable and contractable between the first support portion and the second support portion, and that the closed space is a negative pressure region. .

According to the present invention, in the tank support structure for supporting the tank accommodated in the hold in a state independent from the hull, a plurality of first support portions disposed on the inner surface of the hold, the first support portion corresponds to the tank support structure. A plurality of second support portions disposed on the surface of the tank, and a support block disposed between the first support portion and the second support portion, wherein the support block includes the first support portion A tank support structure characterized by having a box that is configured to be extendable and contractable between a support portion and the second support portion and that forms a closed space, and the closed space is a low thermal conductive gas atmosphere. Is provided.

According to the present invention, in the ship having a tank support structure for supporting a tank accommodated in the hold in a state independent from the hull, the tank support structure includes a plurality of first support portions arranged on the inner surface of the hold. And a plurality of second support portions disposed on the surface of the tank corresponding to the first support portion, and a support block disposed between the first support portion and the second support portion. The support block includes a box that is configured to be expandable and contractable between the first support portion and the second support portion and forms a closed space, and the closed space is a negative pressure region. Is provided.

According to the present invention, in the ship having a tank support structure for supporting a tank accommodated in the hold in a state independent from the hull, the tank support structure includes a plurality of first support portions arranged on the inner surface of the hold. And a plurality of second support portions disposed on the surface of the tank corresponding to the first support portion, and a support block disposed between the first support portion and the second support portion. The support block includes a box that is configured to be extendable and contractable between the first support portion and the second support portion and forms a closed space, and the closed space is a low thermal conductive gas atmosphere. A ship characterized by the above is provided.

The support block may have a porous block accommodated inside the box. Furthermore, the porous block may be made of wood, resin, foam metal or foam ceramic.

The box is connected between a first flat plate disposed on the first support portion side, a second flat plate disposed on the second support portion side, and the first flat plate and the second flat plate. And a side surface portion including a flexible body.

Claims (11)

In the tank support structure that supports the tank housed in the hold in a state independent of the hull,
A plurality of first support portions disposed on the inner surface of the hold;
A plurality of second support portions disposed on the surface of the tank corresponding to the first support portion;
A support block disposed between the first support part and the second support part,
The support block includes a box that is configured to be extendable and contractable between the first support portion and the second support portion and forms a closed space.
A tank support structure characterized by that.   The said support block has a porous block arrange | positioned between a said 1st support part and a said 2nd support part while it is accommodated in the inside of the said box, The Claim 1 characterized by the above-mentioned. Tank support structure.   The tank support structure according to claim 1, wherein the closed space is a negative pressure region.   The tank support structure according to claim 1, wherein the closed space is a low heat conductive gas atmosphere.   The box is connected between a first flat plate disposed on the first support portion side, a second flat plate disposed on the second support portion side, and the first flat plate and the second flat plate. The tank support structure according to claim 1, further comprising: a side part including a flexible body.   The tank support structure according to claim 2, wherein the porous block is made of wood, resin, foam metal, or foam ceramic.   The tank support structure according to claim 3, wherein the box body has a gas adsorbent disposed in the closed space.   One of the first support part or the second support part is configured to be able to lock the support block, and the other of the first support part or the second support part is configured to be able to slide the support block. The tank support structure according to claim 1, wherein:   The tank support structure according to claim 1, wherein the first support portion and the second support portion are configured to be able to lock the support block.   The plurality of tanks are disposed adjacent to the inside of the hold, and are disposed on the side surfaces of the other tanks facing the one tank and the plurality of third support portions disposed on the side surfaces of the one tank. The tank support structure according to claim 1, further comprising a plurality of fourth support parts, wherein the support block is disposed between the third support part and the fourth support part. In a ship having a tank support structure that supports a tank accommodated in a hold in an independent state from the hull, the tank support structure is the tank support structure according to any one of claims 1 to 10. Characteristic ship.