Apparatus for containing liquefied gas storage tank

Abstract

The present disclosure relates to a liquefied gas receiving device comprising: a storage portion for receiving liquefied gas in an internal receiving space; a protrusion protruding from the inner surface of the storage portion toward the receiving space and extending along the circumferential direction of the cross-section of the storage portion; and a sloshing reduction portion having an edge connected to the protrusion and formed by a region being recessed along the longitudinal direction of the storage portion.

Description

Technology Field

[0001] The present disclosure relates to a liquefied gas receiving device. Background Technology

[0002] To safely and efficiently store liquefied gas, a liquefied gas storage tank with high durability and thermal insulation performance is required. Liquefied gas storage tanks primarily used on land and ships are in the form of pressure vessels with end plates attached to the ends of a cylindrical body. After installing and fixing a support structure on land or the ship's deck, the liquefied gas storage tank can be placed on said support structure.

[0003] During the transfer of liquefied gas storage tanks, shaking of the hull and the tanks can cause the fluid contained within to slosh, resulting in pressure and sloshing. As the fluid flows internally due to sloshing, it can impact the inner walls of the tank, potentially damaging it and affecting the vessel's operation.

[0004] Accordingly, a method of installing swash bulkheads was utilized to reduce sloshing inside the liquefied gas storage tank. However, the manufacturing process for bulkhead-type structures is complex and costly, resulting in low production efficiency, and the process of securing these bulkhead-type structures inside the liquefied gas storage tank consumes a significant amount of time and expense. The problem to be solved

[0005] The problem that the present disclosure aims to solve is to provide a liquefied gas receiving device capable of reducing sloshing phenomena.

[0006] However, the technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description of the invention below. means of solving the problem

[0007] A liquefied gas receiving device according to the present disclosure comprises: a storage portion for receiving liquefied gas in an internal receiving space; a protrusion that protrudes from the inner surface of the storage portion toward the receiving space and extends along the circumferential direction of the cross-section of the storage portion; and a sloshing reduction portion formed such that an edge is connected to the protrusion and a region is sunken along the longitudinal direction of the storage portion.

[0008] The above sloshing reduction member may include one or more through holes formed by penetrating along the longitudinal direction of the storage member.

[0009] The above one or more through holes may be placed at a height of 5% or more and 95% or less of the storage unit along the transverse direction of the storage unit.

[0010] The above one or more through holes are provided in multiple numbers, and the multiple through holes may be arranged such that the number gradually decreases as they move away from the center of the sloshing reduction unit along the transverse direction of the storage unit.

[0011] The above protrusion may include a first support member extending toward the receiving space from the inner surface of the storage member; and a second support member extending along the longitudinal direction of the storage member from the first support member.

[0012] The above sloshing reduction unit can be connected to the above second support unit.

[0013] The above sloshing reduction member is disposed on the second support member and may further include a welding bead connecting the sloshing reduction member and the second support member.

[0014] The above protrusion may further include one or more movable holes formed by penetrating along the longitudinal direction of the storage portion.

[0015] The diameter of the above one or more moving holes may be smaller than the diameter of the above one or more through holes.

[0016] The above one or more moving holes may be formed in the area where the first support part and the storage part meet.

[0017] One or more of the above-mentioned moving holes may be formed at the bottom of the storage unit along the transverse direction of the storage unit.

[0018] Both ends of the storage portion are formed concavely, and the sloshing reduction portion may be formed to correspond to the shape of either end of the storage portion. Effects of the invention

[0019] According to one embodiment of the present disclosure, a liquefied gas receiving device capable of reducing sloshing phenomena can be provided.

[0020] However, the effects obtainable through the present invention are not limited to those described above, and other unmentioned technical effects will be clearly understood by a person skilled in the art from the description of the invention below. Brief explanation of the drawing

[0021] FIG. 1 illustrates a liquefied gas receiving device according to one embodiment of the present disclosure. FIG. 2 briefly illustrates the interior of a liquefied gas receiving device according to one embodiment of the present disclosure. FIG. 3 illustrates the connection structure of a sloshing reduction unit according to one embodiment of the present disclosure. FIG. 4 illustrates a sloshing reduction member according to one embodiment of the present disclosure viewed from the front. FIG. 5 illustrates a sloshing reduction member according to another embodiment of the present disclosure as viewed from the front. Figure 6 is an enlarged view of area C of Figure 4. Specific details for implementing the invention

[0022] Hereinafter, the present disclosure will be described in detail with reference to the attached drawings. However, this is merely illustrative and the present disclosure is not limited to the specific embodiments described illustratively.

[0023] Specific terms used in this specification are for convenience of explanation only and are not intended to limit the exemplified embodiments.

[0024] For example, expressions such as "identical" and "to be identical" indicate not only a strictly identical state, but also a state where tolerances or differences exist in the degree to which the same function is obtained.

[0025] For example, expressions indicating relative or absolute arrangements, such as "in a certain direction," "along a certain direction," "parallel," "perpendicular," "to the center," "concentric," or "coaxial," not only strictly represent such arrangements but also indicate a state of relative displacement with respect to tolerances or angles or distances to which the same function is obtained.

[0026] To explain the present disclosure, the following description is based on a spatial orthogonal coordinate system formed by mutually orthogonal X-axis, Y-axis, and Z-axis. Each axis direction (X-axis direction, Y-axis direction, Z-axis direction) refers to the two directions in which each axis extends.

[0027] The X, Y, and Z directions mentioned below are for the purpose of explanation to ensure a clear understanding of the present disclosure, and it goes without saying that each direction may be defined differently depending on where the reference is placed.

[0028] The use of terms such as 'first, second, third' attached to the components mentioned below is intended solely to avoid confusion regarding the components being referred to, and is unrelated to the order, importance, or master-subordinate relationship between the components. For example, an invention including only the second component without the first component can be implemented.

[0029] The terms used in this disclosure are for the description of specific embodiments and are not intended to limit the claims. As used in the description of embodiments and in the appended claims, the singular form is intended to include the plural form unless the context clearly indicates otherwise.

[0031] FIG. 1 illustrates a liquefied gas receiving device (10) according to one embodiment of the present disclosure, FIG. 2 illustrates the interior of the liquefied gas receiving device (10) according to one embodiment of the present disclosure, FIG. 3 illustrates the connection structure of a sloshing reduction unit (300) according to one embodiment of the present disclosure, FIG. 4 illustrates a view of the sloshing reduction unit (300) according to one embodiment of the present disclosure from the front, FIG. 5 illustrates a view of the sloshing reduction unit (300) according to another embodiment of the present disclosure from the front, FIG. 6 illustrates an enlarged view of area C of FIG. 4.

[0032] The liquefied gas receiving device (10) of the present disclosure comprises: a storage portion (100) for receiving liquefied gas in an internal receiving space; a protrusion (200) that protrudes from the inner surface of the storage portion (100) toward the receiving space and extends along the circumferential direction of the cross-section of the storage portion (100); and a sloshing reduction portion (300) whose edge is connected to the protrusion (200) and which is formed by a region being sunken along the longitudinal direction of the storage portion (100).

[0033] In an embodiment, the liquefied gas receiving device (10) can be operated while mounted on a hull (not shown). The liquefied gas receiving device (10) can stably transport the liquefied gas to a destination while containing the liquefied gas inside.

[0034] Here, the liquefied gas may include liquefied natural gas (LNG). However, the liquefied gas is not limited to this and may be liquefied ethane gas, liquefied propane gas, or liquefied hydrocarbon gas. The hull may include various offshore structures operated while floating on the sea. For example, the hull may be an LNG carrier, an LNG regasification vessel, an LNG FPSO (Floating, Production, Storage and Offloading), an LNG FSRU (Floating Storage and Regasification Unit), etc. The type of liquefied gas receiving device (10) is not particularly limited as long as it can contain liquefied gas inside.

[0035] Referring to FIG. 1, the liquefied gas receiving device (10) can be supported by a support structure (1). The support structure (1) can stably support the liquefied gas receiving device (10) on the hull or the ground.

[0036] The above storage unit (100) can accommodate liquefied gas in an internal receiving space. The above storage unit (100) only needs to be able to accommodate the liquefied gas, and its shape is not particularly limited. Both ends of the above storage unit (100) may each be formed concavely. Additionally, both ends of the above storage unit (100) may be connected. Through this, the above storage unit (100) allows the receiving space to have a predetermined volume so that liquefied gas can be accommodated in the receiving space.

[0037] The protrusion (200) may protrude from the inner surface of the storage unit (100) toward the receiving space. The protrusion (200) may extend along the circumferential direction of the cross-section of the storage unit (100). The protrusion (200) may be connected to a sloshing reduction unit (300) described later to fix the sloshing reduction unit (300).

[0038] Referring to FIGS. 2 to 4, the cross-section of the storage unit (100) may refer to a surface obtained by cutting the storage unit (100) along the XZ plane. The periphery direction of the cross-section of the storage unit (100) may refer to a direction that follows the periphery of the storage unit (100) when the storage unit (100) is cut along the XZ plane.

[0039] In FIGS. 2 to 4, the protrusion (200) is shown as being formed continuously along the circumferential direction of the cross-section of the storage unit (100). However, the protrusion (200) is not necessarily formed continuously, and the protrusion (200) may be provided in multiple numbers and arranged discontinuously. In this case as well, the protrusion (200) must be arranged along the circumferential direction of the cross-section of the storage unit (100).

[0040] The edge of the sloshing reduction member (300) may be connected to the protrusion (200). When fluid is contained within the storage unit (100), the sloshing reduction member (300) may be subjected to pressure as the fluid flows. At this time, since the edge of the sloshing reduction member (300) is connected to the protrusion (200), the position of the sloshing reduction member (300) can be fixed and the sloshing phenomenon can be reduced.

[0041] The sloshing reduction section (300) may be formed by a region being sunken along the longitudinal direction of the storage section (100). Referring to FIGS. 2 to 4, the longitudinal direction of the storage section (100) may mean a direction parallel to the Y-axis direction. The sloshing reduction section (300) may be provided in a sunken form along a direction parallel to the Y-axis direction inside the storage section (100). The sloshing reduction section (300) may be provided in a dome shape or a concave shape. The sloshing reduction section (300) may be formed from a metal material. For example, the sloshing reduction section (300) may include one or more selected from the group consisting of copper, stainless steel, iron, aluminum, lead, and tungsten. The sloshing reduction section (300) may be formed from the same material as the storage section (100).

[0042] For example, the sloshing reduction section (300) may be formed to correspond to the shape of either end of the storage section (100). The ends of the storage section (100) may have a concave shape facing in different directions. The sloshing reduction section (300) may also be formed to correspond to the shape of either end of the storage section (100) and may have a concave surface.

[0043] Durability can be improved when one area of ​​the above-mentioned sloshing reduction part (300) is sunken. Compared to the case where the sloshing reduction part (300) is formed flat, the sloshing reduction part (300) of the present disclosure can withstand fluid pressure better. Referring again to FIG. 2, when the fluid applies pressure in the -Y-axis direction to the +Y-axis direction, the above-mentioned sloshing reduction part (300) is provided in a concave shape so that damage to the above-mentioned sloshing reduction part (300) may not occur even when the fluid applies pressure.

[0044] Additionally, the storage unit (100) may be exposed to a cryogenic environment, in which case the storage unit (100) may shrink. For example, depending on the material of the storage unit (100), it may shrink by about 3 mm per 1 m of diameter of the storage unit (100). As the diameter of the storage unit (100) increases, the length of shrinkage will also increase. To this end, the sloshing reduction unit (300) must include a configuration that prevents shrinkage.

[0045] The sloshing reduction member (300) of the present disclosure may not separately provide a configuration (e.g., a spring plate) for preventing shrinkage. This is because, since one area of ​​the sloshing reduction member (300) is formed in a recessed shape, damage to the sloshing reduction member (300) can be prevented even if the edge of the sloshing reduction member (300) shrinks.

[0046] In addition, the sloshing reduction member (300) of the present disclosure may not separately include a component that reinforces rigidity (e.g., a stiffener). This is because the sloshing reduction member (300) is formed with a structure of high durability. Furthermore, since additional components become unnecessary, the welding process used to connect each component can be simplified and manufacturing costs can also be reduced.

[0047] The above-mentioned sloshing reduction section (300) may include one or more through holes (310) formed by penetrating along the longitudinal direction of the storage section (100). Fluid may flow through the through holes (310). The one or more through holes (310) may be positioned at a height of 5% or more and 95% or less of the height (h in FIG. 4) of the storage section (100) along the transverse direction of the storage section (100). The through holes (310) may be formed at an appropriate height considering the fluid capacity and the durability of the above-mentioned sloshing reduction section (300).

[0048] If too many of the above-mentioned through holes (310) are formed or if the above-mentioned through holes (310) are positioned adjacent to the edge, the durability of the above-mentioned sloshing reduction part (300) may be reduced. In addition, if too few of the above-mentioned through holes (310) are formed, the sloshing reduction effect may be reduced.

[0049] In an embodiment, the one or more through holes are provided in a plurality, and the plurality of through holes may be arranged such that the number gradually decreases as they move away from the center of the sloshing reduction unit along the transverse direction of the storage unit. Here, the center of the sloshing reduction unit may refer to a virtual point located in the middle along the transverse direction of the storage unit.

[0050] N (an integer greater than or equal to 1 of N) may be arranged in a first row at the center of the sloshing reduction section (300). A second row may be arranged in the first row along the transverse direction of the storage section (100) at the top or bottom, containing N or fewer through holes (310). Multiple rows may be arranged in the same manner. Referring to FIG. 4, five through holes are arranged at the center of the sloshing reduction section, and the number of through holes gradually decreases as they move toward the top or bottom.

[0051] In another embodiment, the plurality of through holes may be arranged so that the number remains the same along the transverse direction of the storage unit. Referring to FIG. 5, each of the plurality of rows (here, 4 rows) containing the same number (here, 4) of through holes (310) may be arranged along the transverse direction of the storage unit (100).

[0052] The diameters of the one or more through holes (310) may all be different. Among the plurality of through holes (310), the diameter of the through hole (310) closer to the center of the sloshing reduction section (300) along the transverse direction of the storage section (100) may be larger than the diameter of the through hole (310) further from the sloshing reduction section (300). In this case, the fluid may move smoothly through the sloshing reduction section (300), thereby enhancing the sloshing reduction effect.

[0053] The above protrusion (200) may include a first support member (210) and a second support member (220). The first support member (210) may extend from the inner surface of the storage unit (100) toward the receiving space. The second support member (220) may extend along the longitudinal direction of the storage unit (100).

[0054] Referring to FIG. 3, the first support member (210) may extend from the inner surface of the storage unit (100), and the second support member (220) may extend from the end of the first support member (210). The first support member (210) and the second support member (220) may be manufactured as separate components and then welded, or alternatively, manufactured as a single component. In an embodiment, the first support member (210) and the second support member (220) may be vertically connected.

[0055] The sloshing reduction member (300) may be placed on the second support member (220). Referring to FIG. 3, the edge of the sloshing reduction member (300) may be placed on the second support member (220). The liquefied gas receiving device (10) of the present disclosure may further include a welding bead (not shown) connecting the sloshing reduction member (300) and the second support member (220). This is because the sloshing reduction member (300) and the second support member (220) may be formed by welding. The welding bead may be formed in an area where the edge of the sloshing reduction member (300) and the upper surface of the second support member (220) meet each other. Through this, the sloshing reduction member (300) and the second support member (220) can be stably connected.

[0056] The above protrusion (200) may further include one or more movement holes (230) formed by penetrating along the longitudinal direction of the storage portion (100). Fluid may flow through the movement holes (230). Additionally, the one or more movement holes (230) may be formed in the area where the first support portion (210) and the storage portion (100) meet.

[0057] Referring to FIGS. 4 to 6, the moving hole (230) is intended to facilitate the discharge of fluid inside the storage unit (100). When a minute amount of fluid remains inside the storage unit (100), it may be difficult to move due to the protrusion (200). This is because the protrusion (200) is formed protruding from the inner surface of the storage unit (100). Therefore, the moving hole (230) is formed in the area where the first support member (210) and the storage unit (100) meet, so that the fluid moving along the inner surface of the storage unit (100) can easily move between the space separated by the protrusion (200).

[0058] The diameter of the one or more moving holes (230) may be smaller than the diameter of the one or more through holes (310). This is because the purpose of the moving holes (230) is to facilitate fluid discharge rather than to reduce sloshing.

[0059] In an embodiment, the moving holes (230) are provided in plurality, and the plurality of moving holes (230) may be arranged along the circumferential direction of the cross-section of the storage unit (100). Additionally, one or more of the moving holes (230) may be formed at the bottom of the storage unit (100) along the cross-sectional direction of the storage unit (100). This allows the fluid remaining at the bottom of the storage unit (100) to be easily moved.

[0060] The present disclosure may be modified and implemented in various forms, and the scope of rights is not limited to the embodiments described above. The contents described above are merely examples applying the principles of the present disclosure, and other configurations may be further included without departing from the scope of the present invention. Explanation of the symbols

[0061] 10: Liquefied gas receiving device 100: Storage section 200: Protrusion 300: Sloshing reduction section

Claims

Claim 1 A liquefied gas receiving device comprising: a storage portion for receiving liquefied gas in an internal receiving space; a protrusion extending from the inner surface of the storage portion toward the receiving space and extending along the circumferential direction of the cross-section of the storage portion; and a sloshing reduction portion formed as a curved surface structure in which an edge is connected to the protrusion and a region is continuously recessed along the longitudinal direction of the storage portion; wherein both ends of the storage portion are each formed as curved surfaces recessed inward, the sloshing reduction portion is formed to correspond to the shape of either end of the storage portion, the sloshing reduction portion extends along the circumferential direction of the protrusion, and a plurality of through holes are disposed in the sloshing reduction portion, which are formed by penetrating along the longitudinal direction of the storage portion on the curved surface structure, and the through holes are disposed offset toward one side of the longitudinal direction of the storage portion from the sloshing reduction portion. Claim 2 delete Claim 3 A liquefied gas receiving device according to claim 1, wherein the plurality of through holes are arranged at a height of 5% or more and 95% or less of the height of the storage portion along the transverse direction of the storage portion. Claim 4 A liquefied gas receiving device according to claim 1, wherein the plurality of through holes are arranged such that the number of holes gradually decreases as they move away from the center of the sloshing reduction section along the transverse direction of the storage section. Claim 5 A liquefied gas receiving device according to claim 1, wherein the protrusion comprises: a first support member extending toward the receiving space from the inner surface of the storage portion; and a second support member extending along the longitudinal direction of the storage portion from the first support member. Claim 6 In paragraph 5, the above-mentioned sloshing reduction part is a liquefied gas receiving device connected to the above-mentioned second support part. Claim 7 In claim 6, the sloshing reduction member is disposed on the second support member, and the liquefied gas receiving device further comprises a welding bead connecting the sloshing reduction member and the second support member. Claim 8 A liquefied gas receiving device according to claim 5, wherein the above-mentioned protrusion further comprises one or more movable holes formed by penetrating along the longitudinal direction of the storage portion. Claim 9 In claim 8, a liquefied gas receiving device in which the diameter of one or more moving holes is smaller than the diameter of one or more through holes. Claim 10 In claim 8, the above-mentioned one or more moving holes are formed in the region where the first support part and the storage part meet, in a liquefied gas receiving device. Claim 11 In claim 8, the above one or more moving holes are a liquefied gas receiving device formed at the bottom of the storage portion along the transverse direction of the storage portion. Claim 12 delete Claim 13 delete Claim 14 delete

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