Multiangle tanks and ships

Abstract

It comprises an inner tank, an outer tank housing the inner tank, an outermost shell housing both the inner tank and the outer tank, and an inter-tank piping passing between the inner tank and the outer tank. The inner tank comprises an inner tank body and an inner tank protrusion that penetrates the outermost shell from the inner tank body and protrudes to the outside of the outermost shell. The outer tank comprises an outer tank body covering the inner tank body and an outer tank protrusion that penetrates the outermost shell from the top of the outer tank body and protrudes to the outside of the outermost shell, and also surrounds at least a portion of the inner tank protrusion, and the outer tank protrusion has an outer tank exposure portion exposed to the outside of the outermost shell in at least a portion. The inter-tank piping passes between the inner tank body and the outer tank body, passes between the inner tank protrusion and the outer tank protrusion, and also extends outward by penetrating the outer tank exposure portion of the outer tank protrusion.

Description

Technology Field

[0001] The present invention relates to a multi-shell tank and a vessel including the same, and more specifically, to a piping structure passing through adjacent bays of a multi-shell tank. Background Technology

[0002] Conventionally, a multi-sided tank for accommodating low-temperature liquefied gas and a ship equipped with the same are known. Patent Document 1 discloses a multi-sided tank of this type.

[0003] The multi-angled tank (liquid gas storage device) of Patent Document 1 comprises a tank for storing liquid gas, an inner shell covering the tank, and an outer shell covering the inner shell. The insulating space between the tank and the inner shell is filled with vaporized gas obtained by vaporizing the liquid gas. The space between the inner shell and the outer shell is filled with nitrogen gas. A dome is installed at the top of the tank to allow a pipeline for unloading liquid gas to pass through. An evaporated gas pipe is installed in the dome to guide the vaporized gas evaporated in the tank to a heater, and the vaporized gas heated by the heater is supplied to the insulating space by a supply pipe. Prior art literature

[0004] Japanese Patent Publication No. JP6-323498 The problem to be solved

[0005] As described in Patent Document 1, a multi-angle tank composed of multiple sections may be equipped with piping that passes through the sections and extends to the outside of the multi-angle tank in order to supply gas to the sections or discharge gas from the sections. In particular, when flammable fluids or low-temperature fluids are passed through, it is preferable that such piping be installed so as not to pass through other sections located outside the section through which the piping passes, in order to prevent leakage at fittings, etc. In Patent Document 1, a protrusion is installed in the inner section that penetrates the outer section and protrudes outward, and the supply pipe passes through this protrusion and enters the insulation space without passing through other sections located outside. However, this protrusion in the inner section is installed at a location away from the dome where the tank's piping is concentrated.

[0006] The parts of the tank through which pipes penetrate (hereinafter referred to as pipe penetrations) require reinforcement and strength evaluation. Additionally, if the tank is heat-insulated, special heat insulation construction is required for the pipe penetrations as well. For this reason, as the number of pipe penetrations increases, the number of labor costs during manufacturing and the number of inspection points during maintenance increases; therefore, it is desirable to have a small number of pipe penetrations. Furthermore, if pipe penetrations are dispersed in a multi-sided tank, accessibility and maintainability for valves and instruments installed in the piping are reduced; therefore, it is desirable to have pipe penetrations arranged in a concentrated manner.

[0007] The present disclosure has been made in consideration of the above circumstances, and its purpose is to propose a piping structure in a multi-angle tank in which the pipe penetrations of the tanks can be concentrated. means of solving the problem

[0008] A multi-sided tank according to the present disclosure comprises an inner tank, an outer tank housing the inner tank, an outermost shell housing the inner tank and the outer tank, and a tank-to-tank pipe passing between the inner tank and the outer tank; the inner tank comprises an inner tank body and an inner tank protrusion that penetrates the outermost shell from the inner tank body and protrudes to the outside of the outermost shell; the outer tank comprises an outer tank body covering the inner tank body and an outer tank protrusion that penetrates the outermost shell and protrudes to the outside of the outermost shell and also surrounds at least a portion of the inner tank protrusion; the outer tank protrusion has an outer tank exposure portion exposed to the outside of the outermost shell in at least a portion; and the tank-to-tank pipe passes between the inner tank body and the outer tank body, passes between the inner tank protrusion and the outer tank protrusion, and also the outer tank exposure portion of the outer tank protrusion It is characterized by penetrating and extending outward.

[0009] Additionally, the multi-sided tank according to the present disclosure comprises an inner tank, an outer tank housing the inner tank, an outermost tank housing the inner tank and the outer tank, and a tank-interval pipe passing between the inner tank and the outer tank, wherein the inner tank comprises an inner tank body and an inner tank protrusion that protrudes from the inner tank body through the outer tank and the outermost tank to the outside of the outermost tank, and the outer tank comprises an outer tank body covering the inner tank body, and the inner tank protrusion comprises an inner tank exposure portion exposed on the outside of the outermost tank in at least a portion, and the tank-interval pipe passes between the inner tank body and the outer tank body, passes through the inner tank protrusion and into the inner tank protrusion, and also extends outwardly through the inner tank exposure portion of the inner tank protrusion.

[0010] Additionally, the multi-sided tank according to the present disclosure comprises an inner tank, an outer tank housing the inner tank, an outermost tank housing the inner tank and the outer tank, a tank-interval pipe passing between the inner tank and the outer tank, and an inner tank pipe communicating the interior of the inner tank with the outside, wherein the inner tank comprises an inner tank body, and the outer tank comprises an outer tank body covering the inner tank body and an outer tank protrusion penetrating the outermost tank from the outer tank body and protruding outward from the outermost tank, wherein the outer tank protrusion comprises an outer tank exposure portion exposed on the outer side of the outermost tank in at least a portion, and the tank-interval pipe passes between the inner tank body and the outer tank body, passes through the interior of the outer tank protrusion, and extends outwardly by penetrating the outer tank exposure portion of the outer tank protrusion, and the inner tank pipe passes through the inner tank body from the interior of the inner tank body, passes through the interior of the outer tank protrusion, and penetrates the outer tank exposure portion of the outer tank protrusion It is characterized by being extended outward.

[0011] A vessel according to the present disclosure is characterized by having a hull and a multi-angled tank supported on the hull.

[0012] According to the multi-angled tank of the above configuration and the vessel equipped therewith, the pipe penetrations of the multi-angled tank are concentrated in the outer tank protrusion and the inner tank protrusion (or the inner tank protrusion or the outer tank protrusion). By concentrating the pipe penetrations installed in the multi-angled tank in this way, improved workability during tank construction can be expected. Furthermore, during maintenance of valves, instruments, etc., installed in each pipe penetration and the piping passing through the pipe penetrations, improvements in maintainability and accessibility can be expected because the maintenance points are concentrated due to the concentration of the pipe penetrations.

[0013] In addition, in the multi-sided tank of the above configuration and the vessel equipped therewith, the inter-bay piping penetrates the outer bay protrusion or the inner bay protrusion to reach the exposure, and the inter-bay piping does not pass through the space between the outer bay and the outermost bay. Therefore, leakage of the fluid flowing through the inter-bay piping into the space between the outer bay and the outermost bay can be prevented. Effects of the invention

[0014] According to the present disclosure, as a piping structure in a multi-angle tank, it is possible to propose a method in which the pipe penetration portions of the tank can be concentrated. Brief explanation of the drawing

[0015] [Fig. 1] Fig. 1 is a schematic side view of a ship equipped with a multi-angled tank according to an embodiment. [Fig. 2] Fig. 2 is a schematic cross-sectional view of a multi-angle tank with a piping structure according to the first example. [Fig. 3] Fig. 3 is a schematic cross-sectional view of a multi-angle tank with a piping structure according to the first example. [Fig. 4] Fig. 4 is a schematic cross-sectional view of a multi-angle tank with a piping structure according to the second example. [Fig. 5] Fig. 5 is a schematic cross-sectional view of a multi-angle tank with a piping structure according to the third example. [Fig. 6] Fig. 6 is a schematic cross-sectional view of a multi-angle tank with a piping structure according to the fourth example. [Fig. 7] Fig. 7 is a schematic cross-sectional view of a multi-angle tank with a piping structure according to the fifth example. Specific details for implementing the invention

[0016] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In this specification, "inner side" refers to the side closer to the center of the space within the inner chamber of a multi-sided tank, and "outer side" refers to the side farther from the center of the space within the inner chamber of a multi-sided tank.

[0017] [Skiplin's configuration of the ship (1)]

[0018] FIG. 1 is a schematic side view of a vessel (1) equipped with a multi-sided tank (2) according to the present embodiment. As shown in FIG. 1, the vessel (1) has at least one multi-sided tank (2) and a hull (11) on which the multi-sided tank (2) is mounted. The vessel (1) is a liquefied gas carrier that carries low-temperature liquefied gas. Examples of liquefied gas include LNG, liquid nitrogen, liquid hydrogen, liquid helium, etc.

[0019] [Schematic configuration of the multi-angle tank (2)]

[0020] FIG. 2 is a schematic cross-sectional view of a multi-angled tank (2(2A)) with a piping structure according to the first example. As shown in FIG. 1 and FIG. 2, the multi-angled tank (2) comprises an inner tank (3), an outer tank (4) that accommodates the inner tank (3), and an outermost tank (15) that accommodates the inner tank (3) and the outer tank (4). The outermost tank (15) according to the present embodiment is formed by a tank cover (12) that covers the upper part of the outer tank (4) and a retaining wall (14) that covers the side and bottom of the outer tank (4). Instead of the tank cover (12), the upper part of the outer tank (4) may be covered by a part of the hull (11). The retaining wall (14) may be formed, for example, by a part of the hull (11).

[0021] In this embodiment, both the inner tank (3) and the outer tank (4) are spherical. In addition to a perfect spherical shape, the spherical shape may include a capsule shape or an elliptical shape. However, the inner tank (3) and the outer tank (4) are not necessarily limited to a spherical shape and may also be square in shape.

[0022] Liquid gas is contained in the storage space (51) inside the inner tank (3). A sealed space (hereinafter referred to as the insulation space (52)) is formed between the inner tank (3) and the outer tank (4). An insulating material is placed in the insulation space (52). Furthermore, the insulation space (52) is filled with a gas whose boiling point is higher than that of the liquid gas stored in the storage space (51). In this embodiment, the vaporized gas of the liquid gas in the storage space (51) is filled in the insulation space (52), and this vaporized gas is flammable. Thus, when the gas filled in the storage space (51) and the insulation space (52) is the same, the insulation space (52) may be connected to the insulation space (52) inside the inner tank (3).

[0023] Between the outer shell (4) and the outermost shell (15), a nearly sealed space (hereinafter referred to as the retaining space (53)) is formed. The retaining space (53) is filled with, for example, non-combustible gas or flame-retardant gas such as nitrogen gas or inert gas, or dry air. In the retaining space (53) according to the present embodiment, nitrogen gas is filled.

[0024] The inner tank (3) comprises an inner tank body (31) and an inner tank protrusion (32) protruding upward from the top of the inner tank body (31). The inner tank protrusion (32) is intended to protrude toward an exposed space above the tank cover (12) and to form a space communicating with the inside of the inner tank (3) so as to guide a pipe passing through the interior of the inner tank (3) directly to the exposure without passing through another space. The inner tank protrusion (32) has a dome shape and is generally referred to as an inner tank dome. The inner tank protrusion (32) includes a tubular perimeter wall that rises up from the inner tank body (31) and a ceiling wall that closes the upper opening of the perimeter wall. The upper part of the inner tank protrusion (32) protrudes upward above the tank cover (12) and is exposed.

[0025] In the inner tank (3), a tower (20) is installed that extends from the top of the inner tank protrusion (32) to the bottom of the inner tank body (31). Although not shown in the illustration, a pump for pumping up liquefied gas is installed in the lower part of the tower (20). A liquid delivery pipe and an electric pipe are connected to this pump, and these liquid delivery pipes and electric pipes extend through the inside of the tower (20), through the inner tank protrusion (32), and to the outside. However, the pump placed at the bottom of the tower (20) may be omitted. In the inner tank (3), at least one inner tank pipe (91) is installed to communicate the inside of the inner tank (3) with the outside of the multi-angle tank (2). One end of the inner tank pipe (91) is open to the inside of the inner tank (3), and the inner tank pipe (91) extends to the outside by penetrating the inner tank (3) (or the inner tank (3) and the outer tank (4)). The inner tank piping (91) may penetrate the tower (20). Although one inner tank piping (91) is shown as a representative example in FIG. 2, multiple inner tank piping (91) may be installed in the multi-angle tank (2). The inner tank piping (91) is, for example, a pneumatic tube that guides the boil-off gas generated by the vaporization of liquefied gas inside the inner tank (3) from the inner tank (3) to another device outside the multi-angle tank (2). The other device is, for example, a propulsion engine, a power generation engine, a re-liquefaction device, an atmospheric opening device, etc. However, the inner tank piping (91) is not limited to a pneumatic tube and may be, for example, a liquid transport pipe for transporting cargo, a sampling pipe, and a spray pipe.

[0026] At least one inter-tank pipe (92) passes through the cooling space (52) between the inner tank (3) and the outer tank (4). Although one inter-tank pipe (92) is shown as a representative example in FIG. 2, multiple inter-tank pipes (92) may be installed in the multi-angle tank (2). The inter-tank pipe (92) may be appropriately supported by a structural member placed in the cooling space (52). The inter-tank pipe (92) passes between the inner tank body (31) and the outer tank body (41) and extends outward by penetrating at least one of the inner tank (3) and the outer tank (4). One end of the inter-tank pipe (92) may be open at any location between the inner tank body (31) and the outer tank body (41) in the cooling space (52). The inter-tank pipe (92) may branch out and merge within the cooling space (52). The inter-pipeline pipe (92) may be any of a liquid supply pipe, a supply pipe, or an electric pipe. Additionally, if the inter-pipeline pipe (92) is a liquid supply pipe or a supply pipe, the inter-pipeline pipe (92) may supply gas or liquid to the cooling space (52), or the inter-pipeline pipe (92) may discharge gas or liquid from the cooling space (52). Specific examples of the inter-pipeline pipe (92) include a purging pipe, a sampling pipe, an air supply pipe, etc.

[0027] In the inner tank (3) and outer tank (4), the part through which pipes such as the inter-tank pipe (92) pass is conveniently referred to as the pipe penetration part. In the pipe penetration part, airtight construction is performed to ensure airtightness between the tank and the pipe. In addition, heat dissipation construction is performed in the pipe penetration part in the same way as in the tank.

[0028] [Piping Structure]

[0029] Below, the first to fifth examples of piping structures for mainly piping the piping (92) in the multi-angle tank (2) are described.

[0030] <Example 1 of Piping Structures>

[0031] In the multi-angle tank (2A) illustrated in FIG. 2, the outer tank (4) comprises an outer tank body (41) and an outer tank protrusion (42) protruding upward from the top of the outer tank body (41). The outer tank protrusion (42) is intended to form a space that protrudes toward an exposed space above the tank cover (12) and communicates with the cooling space (52) in order to guide the pipe passing through the cooling space (52) between the inner tank (3) and the outer tank (4) directly to the exposure without passing through another space.

[0032] The outer tank protrusion (42) is a tubular body that surrounds the inner tank protrusion (32). However, the outer tank protrusion (42) does not need to surround the entire circumference of the inner tank protrusion (32), but it is sufficient if it surrounds at least a part of it. The top of the outer tank protrusion (42) is lower than the top of the inner tank protrusion (32), and thus, the annular top of the outer tank protrusion (42) appears around the top of the inner tank protrusion (32). The top and a part of the side (upper) of the outer tank protrusion (42) are formed as an outer tank exposure (43) that is exposed above the tank cover (12). However, as long as the outer tank exposure (43) can be formed on the outer tank protrusion (42), the height of the top of the outer tank protrusion (42) may be greater than the height of the top of the inner tank protrusion (32). Additionally, if the outer exposed part (43) is exposed to an exposed space (atmosphere), a cover or roof may be installed around it.

[0033] The inter-tank piping (92) passes between the inner tank body (31) and the outer tank body (41) and between the inner tank protrusion (32) and the outer tank protrusion (42), and extends outward by penetrating the outer tank exposure (43). That is, the pipe penetration for the inter-tank piping (92) is installed in the outer tank exposure (43) of the outer tank protrusion (42). In the multi-angle tank (2A) shown in FIG. 2, the pipe penetration is installed in the outer tank exposure (43) on the side of the outer tank protrusion (42), but as in the multi-angle tank (2A') shown in FIG. 3, the pipe penetration may be installed in the outer tank exposure (43) on the top of the outer tank protrusion (42). Here, FIG. 3 is a schematic cross-sectional view of a multi-angle tank (2A') to which a piping structure according to the first example is applied.

[0034] In the multi-sided tank (2A, 2A') of the above configuration, the pipe penetration for the tank piping (92) is installed in the outer tank protrusion (42). The pipe penetration of the piping passing through the tower (20), which includes the inner tank piping (91), is concentrated in the inner tank protrusion (32). The outer tank protrusion (42) surrounds the side of the inner tank protrusion (32), and the inner tank protrusion (32) and the outer tank protrusion (42) are sufficiently close to each other. Therefore, the pipe penetration installed in the outer tank protrusion (42) and the pipe penetration of the inner tank protrusion (32) can be said to be concentrated and arranged in the multi-sided tank (2A, 2A'). That is, through the piping structure as described above, it becomes possible to concentrate multiple pipe penetrations of the multi-sided tank (2A, 2A'). Each pipe penetration is subjected to airtight construction, heat dissipation construction, and reinforcement, after which a strength evaluation is performed. Improved workability can be expected by consolidating pipe penetrations. Furthermore, while valves and instruments installed in each pipe penetration and the piping passing through them are inspected during maintenance, consolidating pipe penetrations concentrates maintenance locations, thereby allowing for improved maintainability and accessibility.

[0035] In addition, in the multi-angle tank (2A, 2A') of the above configuration, the inter-pipe (92) passes only through the insulation space (52) and does not pass through the storage space (51) and the maintenance space (53). Therefore, if damage occurs to the inter-pipe (92), even if the fluid passing through the inter-pipe (92) leaks into the insulation space (52) or the road surface, it does not leak into the storage space (51) and the maintenance space (53). Therefore, the above piping structure is particularly useful when the fluid passing through the inter-pipe (92) is a combustible gas.

[0036] <Second Example of Piping Structure>

[0037] FIG. 4 is a schematic cross-sectional view of a multi-angled tank (2B) with a piping structure according to the second example. In the multi-angled tank (2B) shown in FIG. 4, the inner tank protrusion (32) has a constricted portion (33) between the upper and lower directions of the base portion (35) and the top portion (36), which are connected to the inner tank body (31). The constricted portion (33) has a smaller diameter than the top portion (36) and the base portion (35) of the inner tank protrusion (32). The constricted portion (33) may be installed along the entire outer circumference of the inner tank protrusion (32), or may be installed at multiple locations distributed along the outer circumference of the inner tank protrusion (32).

[0038] The outer tank (4) comprises an outer tank body (41) and an outer tank protrusion (42) that protrudes upward from the top of the outer tank body (41). The outer tank protrusion (42) has a tubular shape formed to surround the constriction (33) of the inner tank protrusion (32). The outer diameter of the outer tank protrusion (42) is substantially the same as the outer diameter of the top of the inner tank protrusion (36), and the constriction (33) of the inner tank protrusion (32) and the outer tank protrusion (42) are spaced apart. However, the outer diameter of the outer tank protrusion (42) and the outer diameter of the top of the inner tank protrusion (36) may be different. A portion of the side of the outer tank protrusion (42) is an outer tank exposure portion (43) that is exposed upward above the tank cover (12).

[0039] The inter-tank piping (92) passes between the inner tank body (31) and the outer tank body (41), and between the constriction (33) of the inner tank protrusion (32) and the outer tank protrusion (42), and extends outward by penetrating the outer tank exposure (43) of the outer tank protrusion (42). A pipe penetration for the inter-tank piping (92) is installed on the outer tank exposure (43) on the side of the outer tank protrusion (42). In this way, the inter-tank piping (92) passes only through the insulation space (52) within the multi-angle tank (2B) and does not pass through the storage space (51) and the maintenance space (53).

[0040] In the multi-angle tank (2B) equipped with a piping structure according to the second example, in addition to the effects exhibited by the multi-angle tank (2A, 2A') equipped with a piping structure according to the first example, it has the following effects. That is, while the outer tank protrusion (42) and the inner tank protrusion (32) each have independent exposed portions, the combined volume of the outer tank protrusion (42) and the inner tank protrusion (32) can be suppressed.

[0041] <Third Example of Piping Structure>

[0042] FIG. 5 is a schematic cross-sectional view of a multi-angled tank (2C) with a piping structure according to the third example. In the multi-angled tank (2C) shown in FIG. 5, the outer tank (4) comprises an outer tank body (41) and an outer tank protrusion (42) protruding upward from the top of the outer tank body (41). The outer tank protrusion (42) has a dome shape that completely surrounds the entire inner tank protrusion (32). The top and a portion of the side of the outer tank protrusion (42) form an outer tank exposure (43) that is exposed upward above the tank cover (12). The outer diameter of the outer tank protrusion (42) is larger than the outer diameter of the inner tank protrusion (32), and the inner tank protrusion (32) and the outer tank protrusion (42) are spaced apart.

[0043] The inter-tank pipe (92) passes between the inner tank body (31) and the outer tank body (41) and between the inner tank protrusion (32) and the outer tank protrusion (42), and extends outward by penetrating the outer tank exposure portion (43) of the outer tank protrusion (42). A pipe penetration for the inter-tank pipe (92) is installed in the outer tank exposure portion (43) of the outer tank protrusion (42). Here, in FIG. 5, the pipe penetration is installed in the outer tank exposure portion (43) on the side of the outer tank protrusion (42), but the pipe penetration may also be installed in the outer tank exposure portion (43) on the top of the outer tank protrusion (42). The inter-tank pipe (92) passes only through the insulation space (52) in the multi-angle tank (2C) and does not pass through the storage space (51) and the maintenance space (53).

[0044] In the multi-angle tank (2C) equipped with a piping structure according to the third example, in addition to the effects exhibited by the multi-angle tank (2A, 2A) equipped with a piping structure according to the first example, it has the following effects. That is, because the entire inner protrusion (32) is covered by the outer protrusion (42), a cooling layer is formed around the entire inner protrusion (32).

[0045] <Fourth Example of Piping Structure>

[0046] FIG. 6 is a schematic cross-sectional view of a multi-angled tank (2D) with a piping structure according to the fourth example. In the multi-angled tank (2D) shown in FIG. 6, the outer tank (4) is provided with an outer tank body (41), and the side of the outer tank body (41) and the inner tank protrusion (32) are hermetically connected.

[0047] The tank pipe (92) passes between the inner tank body (31) and the outer tank body (41), penetrates the inner tank protrusion (32), passes through the inner tank protrusion (32), and extends outward through the exposed portion of the inner tank protrusion (32). The pipe penetration portion for the tank pipe (92) is installed in the exposed portion of the inner tank protrusion (32) to the insulation space (52) and in the exposed portion of the inner tank protrusion (32). Here, in FIG. 6, the pipe penetration portion is installed in the outer tank exposed portion (43) on the side of the inner tank protrusion (32), but the pipe penetration portion may also be installed in the exposed portion of the top of the inner tank protrusion (32).

[0048] In the multi-angle tank (2D) of the above configuration, the pipe penetration for the inter-tank piping (92) is installed in the inner tank protrusion (32). Furthermore, the pipe penetration of the piping passing through the tower (20), which includes the inner tank piping (91), is concentrated in the inner tank protrusion (32). In this way, the pipe penetration of the piping including the inter-tank piping (92) is concentrated and arranged in the inner tank protrusion (32). That is, through the piping structure as described above, it becomes possible to concentrate multiple pipe penetrations of the multi-angle tank (2D). Each pipe penetration is subjected to airtight construction, heat dissipation construction, and reinforcement, after which a strength evaluation is performed. By concentrating the pipe penetrations, an improvement in workability can be expected. Furthermore, although valves or instruments installed in each pipe penetration and the piping passing through the pipe penetrations are inspected during maintenance, the maintenance points are concentrated by concentrating the pipe penetrations, so an improvement in maintenanceability and accessibility can be expected.

[0049] In addition, in the multi-angle tank (2D) of the above configuration, the inter-pipe (92) passes through the insulation space (52) and the storage space (51), but does not pass through the maintenance space (53). Therefore, if damage or the like occurs to the inter-pipe (92), even if the fluid passing through the inter-pipe (92) leaks into the storage space (51), the insulation space (52), or the road surface, it does not leak into the maintenance space (53). Therefore, the above piping structure is particularly useful when the fluid passing through the inter-pipe (92) is the same as the vaporized gas of the liquefied gas contained in the storage space (51).

[0050] <5th Example of Piping Structure>

[0051] FIG. 7 is a schematic cross-sectional view of a multi-angled tank (2E) with a piping structure according to the fifth example. In the multi-angled tank (2E) shown in FIG. 7, the inner tank (3) has an inner tank body (31) and does not have an inner tank protrusion (32). The outer tank (4) has an outer tank body (41) and an outer tank protrusion (42) that protrudes upward from the top of the outer tank body (41). The outer tank protrusion (42) has a dome shape. A portion of the top and side of the outer tank protrusion (42) is an outer tank exposed portion (43) that is exposed to the outside of the tank cover (12).

[0052] The inter-tank pipe (92) passes between the inner tank body (31) and the outer tank body (41) and through the interior of the outer tank protrusion (42), and extends outward by penetrating the outer tank exposure portion (43) of the outer tank protrusion (42). Here, in FIG. 7, the pipe penetration for the inter-tank pipe (92) is installed on the outer tank exposure portion (43) on the side of the outer tank protrusion (42), but the pipe penetration for the inter-tank pipe (92) may also be installed on the outer tank exposure portion (43) on the top of the outer tank protrusion (42). The inter-tank pipe (92) passes only through the insulation space (52) within the multi-angle tank (2E) and does not pass through the storage space (51) and the maintenance space (53).

[0053] The inner tank pipe (91) penetrates the inner tank body (31), passes through the interior of the outer tank protrusion (42), and extends outward by penetrating the outer tank exposure portion (43) of the outer tank protrusion (42). Here, in FIG. 7, the pipe penetration for the inner tank pipe (91) is installed at the outer tank exposure portion (43) at the top of the outer tank protrusion (42), but the pipe penetration for the inner tank pipe (91) may also be installed at the outer tank exposure portion (43) on the side of the outer tank protrusion (42). The inner tank pipe (91) passes through the storage space (51) and the insulation space (52) within the multi-angle tank (2E), but does not pass through the maintenance space (53).

[0054] In a multi-sided tank (2E) equipped with a piping structure according to the fifth example, if damage or the like occurs to the inter-tank piping (92), the fluid passing through the inter-tank piping (92) leaks into the insulation space (52) or the road surface, but does not leak into the maintenance space (53). Likewise, if damage or the like occurs to the inner tank piping (91), the fluid passing through the inner tank piping (91) leaks into the storage space (51), the insulation space (52), or the road surface, but does not leak into the maintenance space (53). Therefore, the above piping structure is particularly useful when the fluid filled in the insulation space (52) is the same as the vaporized gas of the liquefied gas contained in the storage space (51).

[0055] [Overall]

[0056] As described above, the multi-angle tank (2A, 2A', 2B, 2C) having a piping structure according to the first to third examples of the present embodiment comprises an inner tank (3), an outer tank (4) that accommodates the inner tank (3), an outermost tank (15) that accommodates the inner tank (3) and the outer tank (4), and a tank piping (92) that passes between the inner tank (3) and the outer tank (4). Here, the inner tank (3) comprises an inner tank body (31) and an inner tank protrusion (32) that protrudes outward from the outermost tank (15) by penetrating the outermost tank (15) from the top of the inner tank body (31). The outer tank (4) is provided with an outer tank body (41) covering the inner tank body (31), and an outer tank protrusion (42) that penetrates the outermost part (15) from the top of the outer tank body (41) and protrudes outward from the outermost part (15) and also surrounds at least a part of the inner tank protrusion (32). The outer tank protrusion (42) is provided with an exposed outer tank exposure part (43) in at least a part. The tank pipe (92) passes between the inner tank body (31) and the outer tank body (41), passes between the inner tank protrusion (32) and the outer tank protrusion (42), and also extends outward by penetrating the outer tank exposure part (43) of the outer tank protrusion (42).

[0057] In such multi-sided tanks (2A, 2A', 2B, 2C), a pipe penetration for a pipe-to-pipe connection (92) is installed on the outer tank exposure portion (43) of the outer tank protrusion (42). The outer tank protrusion (42) surrounds the inner tank protrusion (32), which is concentrated with pipe penetrations of pipes passing through the inner tank (3), and the pipe penetration of the pipe-to-pipe connection (92) is positioned close to the pipe penetration of pipes passing through the inner tank (3). By concentrating the pipe penetrations installed in the multi-sided tanks (2A, 2A', 2B, 2C) in this way, an improvement in workability during tank construction can be expected. Furthermore, during maintenance of valves, instruments, etc. installed in each pipe penetration and pipes passing through the pipe penetrations, the maintenance locations are concentrated because the pipe penetrations are concentrated, so an improvement in maintenanceability and accessibility can be expected.

[0058] In addition, in the multi-sided tanks (2A, 2A', 2B, 2C) of the above configuration, the inter-pipe (92) passes only through the insulation space (52) and does not pass through the storage space (51) and the maintenance space (53). Therefore, if damage occurs to the inter-pipe (92), the fluid passing through the inter-pipe (92) does not leak into the storage space (51) and the maintenance space (53). Therefore, as in the above embodiment, when the fluid passing through the inter-pipe (92) is a combustible gas, the above piping structure is particularly useful because the leakage of the combustible gas into the maintenance space (53) is prevented.

[0059] In the multi-angle tank (2A, 2A') having a piping structure according to the first example described above, the inner tank protrusion (32) protrudes more significantly than the outer tank protrusion (42), and the outer tank protrusion (42) has an outer tank exposure portion (43) on at least one of its top portion and side portion.

[0060] In addition, in the multi-angle tank (2B) having a piping structure according to the second example described above, the inner tank protrusion (32) has a constriction (33) in the middle of the protrusion direction, the outer tank protrusion (42) surrounds the constriction (33), and the tank pipe (92) passes between the constriction (33) of the inner tank protrusion (32) and the outer tank protrusion (42).

[0061] Additionally, the multi-angle tank (2D) having a piping structure according to the fourth example of the present embodiment comprises an inner tank (3), an outer tank (4) that accommodates the inner tank (3), an outermost tank (15) that accommodates the inner tank (3) and the outer tank (4), and a tank-to-tank pipe (92) that passes between the inner tank (3) and the outer tank (4). Here, the inner tank (3) comprises an inner tank body (31) and an inner tank protrusion (32) that protrudes outward from the outermost tank (15) by penetrating the outer tank (4) and the outermost tank (15) from the top of the inner tank body (31), and the inner tank protrusion (32) has an exposed inner tank exposure part (38) in at least a part. The outer tank (4) comprises an outer tank body (41) that covers the inner tank body (31). And, the tank pipe (92) passes between the inner tank body (31) and the outer tank body (41), passes through the inner tank protrusion (32) and into the inner tank protrusion (32), and also extends outward by passing through the inner tank exposure portion (38) of the inner tank protrusion (32).

[0062] In the multi-angle tank (2D) of the above configuration, a pipe penetration for the inter-tank piping (92) is installed in the inner tank protrusion (32), so that the pipe penetrations of the piping including the inter-tank piping (92) are concentrated and arranged in the inner tank protrusion (32). By concentrating the pipe penetrations installed in the multi-angle tank (2D) in this way, an improvement in workability during tank construction can be expected. Furthermore, during maintenance of valves or instruments installed in each pipe penetration and the piping passing through the pipe penetrations, the maintenance locations are concentrated because the pipe penetrations are concentrated, so an improvement in maintainability and accessibility can be expected.

[0063] Furthermore, in the multi-angle tank (2D), the inter-pipe (92) passes through the insulation space (52) and the storage space (51), but does not pass through the maintenance space (53). Therefore, if damage occurs to the inter-pipe (92), the fluid passing through the inter-pipe (92) is prevented from leaking into the maintenance space (53). Thus, if the fluid passing through the inter-pipe (92) is a combustible gas identical to the vaporized gas of the liquefied gas contained in the storage space (51), the above-described piping structure is particularly useful because the leakage of the combustible gas into the maintenance space (53) is prevented.

[0064] In addition, the multi-angle tank (2E) having a piping structure according to the fifth example of the present embodiment comprises an inner tank (3), an outer tank (4) containing the inner tank (3), an outermost tank (15) containing the inner tank (3) and the outer tank (4), a tank-interval pipe (92) passing between the inner tank (3) and the outer tank (4), and an inner tank pipe (91) communicating the inside of the inner tank (3) with the outside. Here, the inner tank (3) is provided with an inner tank body (31), and the outer tank (4) is provided with an outer tank body (41) covering the inner tank body (31), and an outer tank protrusion (42) that penetrates the outermost tank (15) from the outer tank body (41) and protrudes to the outside of the outermost tank (15), and the outer tank protrusion (42) is provided with an outer tank exposure part (43) exposed to the outside of the outermost tank (15) in at least a part. And, the tank pipe (92) passes between the inner tank body (31) and the outer tank body (41), passes through the interior of the outer tank protrusion (42), and extends outward by penetrating the outer tank exposure portion (43) of the outer tank protrusion (42), and the inner tank pipe (91) passes through the inner tank body (31) within the inner tank body (31), passes through the interior of the outer tank protrusion (42), and extends outward by penetrating the outer tank exposure portion (43) of the outer tank protrusion (42).

[0065] In the multi-angle tank (2E) of the above configuration, pipe penetrations for the inter-tank piping (92) and the inner tank piping (91) are installed on the outer tank protrusion (42), so that the pipe penetrations including the inter-tank piping (92) and the inner tank piping (91) are concentrated and arranged on the outer tank protrusion (42). By concentrating the pipe penetrations installed in the multi-angle tank (2E) in this way, an improvement in workability during tank construction can be expected. Furthermore, during maintenance of valves or instruments installed in each pipe penetration and the piping passing through the pipe penetrations, the maintenance locations are concentrated because the pipe penetrations are concentrated, so an improvement in maintenance efficiency and accessibility can be expected.

[0066] Furthermore, in the multi-sided tank (2E), the inter-bath pipe (92) passes through the insulation space (52) but does not pass through the retention space (53). Likewise, the inner-bath pipe (91) passes through the storage space (51) and the insulation space (52) but does not pass through the retention space (53). Therefore, if damage occurs to the inter-bath pipe (92) and / or the inner-bath pipe (91), the fluid passing through the inter-bath pipe (92) and / or the inner-bath pipe (91) is prevented from leaking into the retention space (53). Thus, the above pipe structure is particularly useful when the fluid filled in the insulation space (52) is the same as the vaporized gas of the liquefied gas contained in the storage space (51).

[0067] Additionally, the vessel (1) according to the present embodiment comprises a hull (11) and multi-sided tanks (2) (2A to 2E) supported on the hull (11). Liquefied gas is contained in the inner tank (3), combustible gas is filled between the inner tank (3) and the outer tank (4), and non-combustible gas, flame-retardant gas, or dry air is filled between the outer tank (4) and the outermost tank (15). In the vessel (1) above, the combustible gas filled between the inner tank (3) and the outer tank (4) in the multi-sided tanks (2) (2A to 2E) is prevented from passing through the inter-tank pipe (92) and leaking into the space filled with non-combustible gas between the outer tank (4) and the outermost tank (15).

[0068] Although preferred embodiments of the present disclosure have been described above, modifications to the specific structure and / or details of the function of the embodiments may also be included in the present disclosure without departing from the spirit of the present disclosure. The above configuration may be modified, for example, as follows.

[0069] For example, the multi-angle tank (2) (2A to 2E) according to the above embodiment has two tanks, an inner tank (3) and an outer tank (4), but may have three or more tanks. In this case, the present disclosure can be applied by considering a set of tanks adjacent to each other inside and outside as the inner tank (3) and the outer tank (4).

[0070] For example, the multi-angle tank (2) (2A to 2E) according to the above embodiment is a spherical (or rectangular) tank independent from the hull (11), but it may also be a membrane-type tank utilizing the hull (11). In this case, the present disclosure can be applied to a membrane-type tank by reading the inner tank (3) as a membrane, the outer tank (4) as an inner angle, and the outermost angle (15) as an outer angle (hull) in the above embodiment.

[0071] For example, the multi-angled tank (2) (2A to 2E) according to the above embodiment is a cargo tank, but the multi-angled tank (2) (2A to 2E) does not necessarily have to be mounted on the ship (1) as a cargo tank and may be mounted as a fuel tank. Also, the number of multi-angled tanks (2) (2A to 2E) mounted on the ship (1) is not specified. Explanation of the symbols

[65535] 1: Vessel 3: Inner tank 4: Outer tank 11: Hull 15: Outermost 31: Inner tank main body 32: Inner tank protrusion 33: Constriction 38: Inner tank exposed part 41: Outer tank main body 42: Outer tank protrusion 43: Outer tank exposed part 91: Inner tank piping 92: Inter-tank piping

Claims

Claim 1 The apparatus comprises an inner tank, an outer tank housing the inner tank, an outermost shell housing the inner tank and the outer tank, and a tank pipe passing between the inner tank and the outer tank. The inner tank comprises an inner tank body and an inner tank protrusion that penetrates the outermost shell from the inner tank body and protrudes to the outside of the outermost shell. The outer tank comprises an outer tank body covering the inner tank body and an outer tank protrusion that penetrates the outermost shell and protrudes to the outside of the outermost shell and also surrounds at least a portion of the inner tank protrusion. The outer tank protrusion has an outer tank exposure portion exposed to the outside of the outermost shell in at least a portion. The tank pipe passes through a sealed space between the inner tank body and the outer tank body, passes between the inner tank protrusion and the outer tank protrusion, and also passes through a pipe penetration portion installed on the outer tank exposure portion of the outer tank protrusion and extends outwardly. A sealing construction is performed between the outer tank and the tank pipe at the pipe penetration portion. A multi-angled tank characterized by having Claim 2 A multi-angled tank according to claim 1, wherein the inner tank protrusion protrudes more significantly than the outer tank protrusion, and the outer tank protrusion is provided with the outer tank exposure portion on at least one of its top portion and side portion. Claim 3 A multi-angle tank according to claim 1, wherein the inner protrusion is provided with a constriction in the middle of the protrusion direction, the outer protrusion surrounds the constriction, and the inter-tank piping passes between the constriction of the inner protrusion and the outer protrusion. Claim 4 A multi-angle tank comprising an inner tank, an outer tank accommodating the inner tank, an outermost shell accommodating the inner tank and the outer tank, and a tank-interval pipe passing between the inner tank and the outer tank; the inner tank comprises an inner tank body and an inner tank protrusion that protrudes from the inner tank body through the outer tank and the outermost shell to the outside of the outermost shell; the outer tank comprises an outer tank body covering the inner tank body, and the inner tank protrusion comprises an inner tank exposure portion exposed on the outside of the outermost shell in at least a portion thereof; the tank-interval pipe passes through a hermetic space between the inner tank body and the outer tank body, passes through the inner tank protrusion to pass into the inner tank protrusion, and also passes through a pipe penetration portion installed on the inner tank exposure portion of the inner tank protrusion and extends outwardly, wherein a hermetic seal is performed between the inner tank and the tank-interval pipe at the pipe penetration portion. Claim 5 The apparatus comprises an inner tank, an outer tank housing the inner tank, an outermost shell housing the inner tank and the outer tank, a tank pipe passing between the inner tank and the outer tank, and an inner tank pipe communicating the interior of the inner tank with the outside. The inner tank comprises an inner tank body. The outer tank comprises an outer tank body covering the inner tank body and an outer tank protrusion penetrating the outermost shell from the outer tank body and protruding outward from the outermost shell. The outer tank protrusion comprises an outer tank exposure portion exposed outward from the outermost shell in at least a portion thereof. The tank pipe passes through a hermetic space between the inner tank body and the outer tank body, passes through the interior of the outer tank protrusion, passes through a pipe penetration portion installed in the outer tank exposure portion of the outer tank protrusion, and extends outward. The inner tank pipe passes through the inner tank body from within the inner tank body, passes through the interior of the outer tank protrusion, and passes through a pipe penetration portion installed in the outer tank exposure portion of the outer tank protrusion. A multi-angled tank characterized by being extended outwardly and having airtight construction performed between the outer tank and the inter-tank piping at the pipe penetration section. Claim 6 A vessel characterized by comprising a hull and a multi-angled tank according to any one of claims 1 to 5 supported on the hull. Claim 7 A vessel according to claim 6, characterized in that liquefied gas is contained in the inner tank, combustible gas is filled between the inner tank and the outer tank, and non-combustible gas, flame-retardant gas, or dry air is filled between the outer tank and the outermost tank.

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