KR102469329B1 - Liquefied gas storage tank - Google Patents

Abstract

A liquefied gas storage tank is disclosed. In the liquefied gas storage tank according to the present embodiment, a liquefied gas receiving space is provided therein, and the body member extending in the horizontal direction and protruding on the inner circumferential surface of the body member are provided, and the liquefied gas flows intermittently along the circumferential direction. or a plurality of sloshing reducing members that suppress shaking, and the sloshing reducing member has an outer end supported on an inner circumferential surface of the body member, a first rib extending in a vertical direction, and a horizontal horizontal line from the inner end of the first rib. It may be provided by including a second rib formed extending in the direction.

Description

Liquefied gas storage tank {LIQUEFIED GAS STORAGE TANK}

The present invention relates to a liquefied gas storage tank, and more particularly, to a liquefied gas storage tank capable of stably absorbing and reducing a sloshing load generated by liquefied gas accommodated or loaded therein.

As the regulations of the International Maritime Organization (IMO) on the emission of greenhouse gases and various air pollutants are strengthened, the shipbuilding and shipping industries use natural gas, a clean energy source, as fuel gas for ships instead of using heavy oil and diesel oil, which are existing fuels. are increasingly being used.

Natural gas is an eco-friendly energy source whose main component is methane. For ease of storage and transportation, natural gas is cooled to about -163 ℃ and phase changed into liquefied natural gas. It is accommodated in a ship's storage tank or fuel tank and used as a power source for the hull or transported to a distant place of demand.

Liquefied natural gas is a type of liquefied gas. When the liquefied gas cooled and liquefied at a very low temperature is accommodated in a storage tank or fuel tank, shaking occurs in the hull and storage tank due to wind and waves during navigation. A sloshing phenomenon occurs. The sloshing phenomenon refers to a phenomenon in which a large impact is applied to the sidewall or ceiling structure of a tank while the liquid cargo accommodated inside flows. it means. It is very important to absorb and reduce the sloshing load generated by liquefied gas because the sloshing load can cause deformation and damage of the storage tank or fuel tank.

Therefore, conventionally, a method of suppressing the flow or fluctuation of liquefied gas by installing a swash bulkhead or the like provided in the form of a bulkhead inside the storage tank has been utilized. However, since the bulkhead-type structure must be constructed in the middle of the storage tank, the manufacturing process of the storage tank becomes complicated and manufacturing cost and work period increase. Furthermore, since the weight of the storage tank increases as the structure in the form of a bulkhead is added, there is a problem in that the operational efficiency of the floating offshore structure such as a ship on which the storage tank is mounted is lowered.

Republic of Korea Patent Publication No. 10-2014-0091891 (published on July 23, 2014)

The present embodiment is intended to provide a liquefied gas storage tank capable of stably absorbing and reducing the sloshing load applied by the liquefied gas accommodated therein.

This embodiment is intended to provide a liquefied gas storage tank capable of stably absorbing and reducing sloshing load with a simple structure.

This embodiment is intended to simplify the manufacturing process and provide a liquefied gas storage tank capable of reducing manufacturing costs.

This embodiment aims to provide a liquefied gas storage tank that can improve the efficiency of operation and handling by promoting light weight of the product.

The present embodiment is intended to provide a liquefied gas storage tank capable of preventing deformation and damage and promoting structural stability.

The present embodiment is intended to provide a liquefied gas storage tank capable of suppressing concentration of sloshing load without a large and heavy structure such as a conventional swash bulkhead.

According to one aspect of this embodiment, the body member is provided with a liquefied gas accommodating space therein and extends in a horizontal direction; And a plurality of sloshing reducing members protruding on the inner circumferential surface of the body member and intermittently extending along the circumferential direction to suppress the flow or fluctuation of liquefied gas, wherein the sloshing reducing member has an outer end of the above It may be provided by including a first rib supported on an inner circumferential surface of the body member and extending in a vertical direction, and a second rib extending in a horizontal direction from an inner end of the first rib.

The sloshing reducing member is provided on one side and the other side on the inner circumferential surface of the body member, respectively, to form a pair, but may be disposed separately from each other.

A plurality of pairs of the sloshing reduction member are provided along the longitudinal direction of the body member, and may be spaced apart from each other.

The sloshing reduction member may be selectively disposed on one of an upper surface portion and a lower surface portion of an inner circumferential surface of the body member.

The sloshing reducing members are provided in a plurality of rows spaced apart from each other along the longitudinal direction of the body member, and the plurality of rows of sloshing reducing members may be alternately arranged on the upper surface and the lower surface.

The sloshing reducing member may be selectively disposed on any one of upper and lower surfaces, one side and the other side of the inner circumferential surface of the body member.

The sloshing reducing members are provided in a plurality of rows spaced apart from each other along the longitudinal direction of the body member, and the plurality of rows of sloshing reducing members are sequentially arranged on the upper surface, the one side, the lower and the other side. It can be.

A body member having a liquefied gas receiving space provided therein and extending in a horizontal direction; and a plurality of sloshing reducing members protruding on the inner circumferential surface of the body member and extending in a wave form along the circumferential direction to suppress flow or fluctuation of liquefied gas, wherein the sloshing reducing member includes An outer end may be provided including a first rib supported on an inner circumferential surface of the body member and extending in a vertical direction, and a second rib extending in a horizontal direction from an inner end of the first rib.

The sloshing reducing member may be provided in a ring shape by continuously extending on the inner circumferential surface of the body member.

A plurality of the sloshing reducing members may be disposed spaced apart from each other along the longitudinal direction of the body member.

The sloshing reducing member may further include an opening formed through the first rib in a horizontal direction.

A plurality of openings may be formed through the first rib along a circumferential direction.

The sloshing reduction member may be provided in place of the swash bulkhead.

The liquefied gas storage tank according to the present embodiment has an effect of stably absorbing and reducing the sloshing load generated by the flow of liquefied gas.

The liquefied gas storage tank according to the present embodiment has a simple structure and has an effect of stably absorbing and reducing the sloshing load.

The liquefied gas storage tank according to this embodiment has the effect of simplifying the manufacturing process of the product and reducing the manufacturing period and manufacturing cost.

The liquefied gas storage tank according to the present embodiment has the effect of improving the efficiency of operation and handling by promoting weight reduction of the product.

The liquefied gas storage tank according to this embodiment has an effect of preventing deformation and damage and promoting structural stability.

The liquefied gas storage tank according to the present embodiment has an effect of easily suppressing concentration of sloshing load without a large and heavy structure such as a conventional swash bulkhead.

1 is a view showing a state in which a liquefied gas storage tank according to an embodiment of the present invention is mounted on a ship.
2 is a side cross-sectional view showing a liquefied gas storage tank according to a first embodiment of the present invention.
FIG. 3 is a cross-sectional view in the AA′ direction of FIG. 2 .
4 is a BB′ direction cross-sectional view of FIG. 3 .
5 is a perspective view showing a liquefied gas storage tank according to a first embodiment of the present invention.
6 is a lateral cross-sectional view and a partial cross-sectional view showing a liquefied gas storage tank according to a second embodiment of the present invention.
7 is a lateral cross-sectional view and a partial cross-sectional view showing a liquefied gas storage tank according to a third embodiment of the present invention.
8 is a side cross-sectional view showing a liquefied gas storage tank according to a fourth embodiment of the present invention.
9 is a cross-sectional view showing a sloshing reducing member according to a fifth embodiment of the present invention.

Hereinafter, this embodiment will be described in detail with reference to the accompanying drawings. The following examples are presented to sufficiently convey the spirit of the present invention to those skilled in the art to which the present invention belongs, and may be embodied in other forms without being limited to those presented here. In the drawings, in order to clarify the present invention, illustration of parts irrelevant to the description may be omitted, and the size of components may be slightly exaggerated to help understanding.

1 is a view showing a state in which liquefied gas storage tanks 100, 200, 300, 400, and 500 according to an embodiment of the present invention are mounted on a ship 1.

Referring to FIG. 1 , the liquefied gas storage tanks 100, 200, 300, 400, and 500 according to the present embodiment may be operated while being mounted on the hull 1. The liquefied gas storage tanks 100, 200, 300, 400, and 500 can receive and store liquefied gas from production areas, etc., and stably store the liquefied gas until unloading at the destination. In addition, the liquefied gas storage tanks 100, 200, 300, 400, and 500 may accommodate or store liquefied gas therein to charge the fuel gas required for the engine or power generation facility of the ship 1.

The liquefied gas may be composed of liquefied natural gas (LNG). However, it is not limited to this, and it should be understood the same even in the case of various types of liquefied gases such as liquefied ethane gas, liquefied propane gas, and liquefied hydrocarbon gas. In addition, the ship 1 described in this embodiment includes various offshore structures operated in a floating state. As an example, the ship 1 of this embodiment is a liquefied natural gas carrier (LNG Carrier), an LNG RV (LNG Regasification Vessel), an LNG FPSO (Floating, Production, Storage and Off-loading), an LNG FSRU (Floating Storage and Regasification Unit) ), etc., and if the liquefied gas is accommodated or stored in the liquefied gas storage tank (100, 200, 300, 400, 500) and operated, it is not limited to any one type of offshore structure.

The liquefied gas storage tanks (100, 200, 300, 400, 500) are sloshing while the loaded liquefied gas flows when shaking occurs due to the operation of the ship 1 or storm waves while the liquefied gas is accommodated or stored therein. (Sloshing) phenomenon occurs. The sloshing phenomenon refers to a phenomenon in which an excessive load is applied to the walls of the storage tanks (100, 200, 300, 400, 500) while the cargo in liquid state stored or stored inside flows or fluctuates according to vibration or shaking. Since the sloshing load may cause deformation or damage of the storage tanks 100, 200, 300, 400, and 500, it is very important to suppress and reduce it. Accordingly, the liquefied gas storage tanks 100, 200, 300, 400, and 500 according to the present embodiment suppress the flow or fluctuation of the liquefied gas accommodated or stored therein despite the operation or shaking of the ship 1, thereby suppressing the sloshing load. are designed to reduce and minimize

2 is a lateral cross-sectional view showing the liquefied gas storage tank 100 according to the first embodiment of the present invention. 3 is a cross-sectional view in the direction A-A' of FIG. 2, and FIG. 4 is a cross-sectional view in the direction B-B' of FIG. 5 is a perspective view showing the liquefied gas storage tank 100 according to the first embodiment of the present invention.

2 to 5, the liquefied gas storage tank 100 according to the first embodiment of the present invention includes a body member 110 having an accommodation space 110a in which liquefied gas is accommodated or stored, A sloshing reducing member 120 may be provided to protrude along the circumferential direction on the inner circumferential surface 111 of the body member 110 to suppress flow or fluctuation of liquefied gas.

The body member 110 may be provided in a cylindrical shape and may extend in a horizontal direction. An accommodation space 110a for accommodating liquefied gas may be formed inside the body member 110, and may be thermally insulated to minimize vaporization of the liquefied gas due to heat intrusion from the outside. Nevertheless, since it is practically impossible to completely block heat penetration, the liquefied gas storage tank 100 may be provided as a pressurized tank to stably accommodate boil-off gas generated by vaporization of the liquefied gas. For example, the liquefied gas storage tank 100 may be made of a pressurized storage tank 100 of IMO classification C-Type, but is not limited to that type.

The sloshing reducing member 120 protrudes on the inner circumferential surface 111 of the body member 110 and extends intermittently along the circumferential direction, thereby suppressing the flow or fluctuation of the liquefied gas accommodated therein. The sloshing reducing member 120 is fixed and installed to the inner circumferential surface 111 of the body member 110 by welding or the like at the outer end of the first rib 121 to be described later, thereby preventing the flow or fluctuation of liquefied gas as described later. It is possible to suppress, as well as reinforce the rigidity of the body member (110).

The sloshing reduction member 120 is disposed on the inner circumferential surface 111 of the body member 110 along the circumferential direction to suppress the flow or fluctuation of the liquefied gas, but may be intermittently extended and provided in an arc shape. In addition, as shown in FIGS. 3 and 5, the sloshing reduction member 120 may be provided on one side portion 111b and the other side portion 111d, which are both sides of the body member 110, to form a pair. As shown in FIG. 2, a plurality of pairs may be disposed spaced apart from each other along the longitudinal direction of the body member 110. Meanwhile, in FIG. 2, the sloshing reduction member 120 is shown as being disposed in four pairs on the body member 110, but the position and number are not limited, and the standard of the liquefied gas storage tank 100 or the liquefied gas Depending on the operating environment, such as the liquefaction point, the number and location can be variously changed.

Each sloshing reducing member 120 has a first rib 121 (rib) whose outer end is fixed and supported on the inner circumferential surface 111 of the body member 110 and extends in the vertical direction, and the first rib 121 It may be provided, including a second rib 122 formed extending in the horizontal direction from the inner end of the.

Referring to FIG. 4, the first rib 121 is formed extending in a vertical direction from the inner circumferential surface 111 of the body member 110 toward the inside of the accommodation space 110a, and the outer end thereof is the inner circumferential surface of the body member 110 ( 111) can be fixed and supported by welding or the like. Second ribs 122 extending in the horizontal direction may be provided at the inner end of the first rib 121 to extend to both sides, so that the cross-sectional shape of the sloshing reducing member 120 has a 'T' shape. can be achieved

As such, the cross-sectional shape of the sloshing reducing member 120 is formed in a 'T' shape by the first rib 121 and the second rib 122, so that the rigidity of the body member 110 is secured and the sloshing load is secured. stress can be improved. Specifically, as the outer end of the first rib 121 is fixed to the inner circumferential surface 111 of the body member 110, the rigidity of the body member 110 can be further improved, and the liquefied gas in the accommodation space 110a Even if the flow occurs, it is possible to suppress fluctuations of the liquefied gas from rapidly increasing due to gaps or grooves formed between the outer end of the second rib 122 and the inner circumferential surface 111 of the body member 110. In addition, as a pair of sloshing reduction members 120 are provided symmetrically on both side surfaces of the inner circumferential surface 111 of the body member 110, the sloshing cycle can be broken down to more easily suppress and reduce the sloshing phenomenon. . In addition, as the sloshing reduction member 120 is formed to selectively extend to a required portion on the inner circumferential surface 111 of the body member 110, it is possible to reduce the weight of the storage tank 100 and simplify the structure.

The sloshing reducing member 120 may be installed on the inner circumferential surface 111 of the body member 110 by integrally forming the first rib 121 and the second rib 122 to simplify the manufacturing process. However, other than that, after the first rib 121 is first installed on the inner circumferential surface 111 of the body member 110 by welding, the second rib 122 is welded to the top or inner end of the first rib 121. By subsequently installing, the construction of the sloshing reducing member 120 may be completed.

Hereinafter, the liquefied gas storage tank 200 according to the second embodiment of the present invention will be described.

6 is a lateral cross-sectional view and a partial cross-sectional view showing a liquefied gas storage tank 200 according to a second embodiment of the present invention. Referring to FIG. 6, the liquefied gas storage tank 200 according to the second embodiment of the present invention Is protruded along the circumferential direction on the body member 110 having an accommodation space 110a for accommodating or storing liquefied gas therein, and the inner circumferential surface 111 of the body member 110. Of the body member 110 It may be provided by including a sloshing reduction member 120 selectively disposed on one of the upper surface portion 111a and the lower surface portion 111c of the inner circumferential surface 111 .

Among the descriptions of the liquefied gas storage tank 200 according to the second embodiment of the present invention described below, liquefied gas storage tank according to the first embodiment of the present invention described above, except for cases where separate reference numerals are additionally described. It is the same as the description for (100), and the description is omitted to prevent duplication of contents.

The sloshing reducing member 120 may be disposed in a plurality of rows spaced apart from each other along the longitudinal direction of the body member 110, and each sloshing reducing member 120 is placed on the inner circumferential surface 111 of the body member 110. It is disposed along the circumferential direction to suppress the flow or fluctuation of the liquefied gas, but is intermittently formed to extend and may be provided in an arc shape. A plurality of rows of sloshing reducing members 120 may be alternately arranged on the upper surface portion 111a and the lower surface portion 111c of the inner circumferential surface 111 of the body member 110 .

Specifically, referring to FIG. 6, if the sloshing reducing members 120 in the first row on the left side of the drawing are disposed on the upper surface portion 111a on the inner circumferential surface 111 of the body member 110, they are disposed on the right side of the first row. The second row of sloshing reducing members 120 may be disposed on the upper and lower surfaces 111c of the inner circumferential surface 111 of the body member 110 such that the arrangement positions intersect. Subsequently, the third column disposed on the right side of the second column may be disposed on the upper surface portion 111a on the inner circumferential surface 111 of the body member 110 so that the arrangement position intersects again. In this way, the plurality of rows of sloshing reducing members 120 are provided to cross each other at different arrangement positions from the sloshing reducing members 120 provided in adjacent rows, thereby more effectively breaking down the sloshing cycle and easily suppressing the sloshing phenomenon. and can be reduced. In addition, since the sloshing reducing member 120 is selectively extended to a required portion on the inner circumferential surface 111 of the body member 110, the weight of the storage tank 200 and the simplification of the structure can be promoted.

Hereinafter, the liquefied gas storage tank 300 according to the third embodiment of the present invention will be described.

7 is a lateral cross-sectional view and a partial cross-sectional view showing a liquefied gas storage tank 300 according to a third embodiment of the present invention. Referring to FIG. 7, the liquefied gas storage tank 300 according to the third embodiment of the present invention Is protruded along the circumferential direction on the body member 110 having an accommodation space 110a for accommodating or storing liquefied gas therein, and the inner circumferential surface 111 of the body member 110. Of the body member 110 It may be provided including a sloshing reducing member 120 selectively disposed on any one of the upper surface portion 111a, the lower surface portion 111c, one side portion 111b, and the other side surface portion 111d of the inner circumferential surface 111. .

Among the descriptions of the liquefied gas storage tank 300 according to the third embodiment of the present invention described below, the liquefied gas storage tank according to the first embodiment of the present invention described above except for the case of additional description with separate reference numerals. It is the same as the description for (100), and the description is omitted to prevent duplication of contents.

The sloshing reducing member 120 may be disposed in a plurality of rows spaced apart from each other along the longitudinal direction of the body member 110, and each sloshing reducing member 120 is placed on the inner circumferential surface 111 of the body member 110. It is disposed along the circumferential direction to suppress the flow or fluctuation of the liquefied gas, but is intermittently formed to extend and may be provided in an arc shape. A plurality of rows of sloshing reducing members 120 are sequentially arranged on the upper surface portion 111a, one side surface portion 111b, the lower surface portion 111c, and the other side surface portion 111d on the inner circumferential surface 111 of the body member 110. can

Specifically, referring to FIG. 7, the sloshing reducing members 120 of the first row on the left side of the drawing are disposed on the upper surface portion 111a on the inner circumferential surface 111 of the body member 110, and are disposed on the right side of the first row. The second row of sloshing reducing members 120 may be disposed on one side surface portion 111b (right side portion) on the inner circumferential surface 111 of the body member 110. Subsequently, in the third column disposed on the right side of the second column, the sloshing reduction member 120 is disposed on the upper and lower surfaces 111c of the inner circumferential surface 111 of the body member 110, and the fourth column disposed on the right side of the third column. The sloshing reduction member 120 of the row is disposed on the other side surface portion 111d (left side portion) on the inner circumferential surface 111 of the body member 110, so that the arrangement positions may be sequentially arranged while intersecting each other. In this way, a plurality of rows of sloshing reducing members 120 are provided to intersect at a different arrangement position from the sloshing reducing members 120 provided in adjacent rows, and at the same time, on the upper side and one side on the inner circumferential surface 111 of the body member 110. , by being sequentially arranged on the lower side and the other side, it is possible to more effectively break down the sloshing cycle to easily suppress and reduce the sloshing phenomenon. In addition, since the sloshing reducing member 120 is selectively extended to a required portion on the inner circumferential surface 111 of the body member 110, the weight of the storage tank 300 and the simplification of the structure can be promoted.

Hereinafter, the liquefied gas storage tank 400 according to the fourth embodiment of the present invention will be described.

8 is a lateral cross-sectional view showing a liquefied gas storage tank 400 according to a fourth embodiment of the present invention. Referring to FIG. 8, the liquefied gas storage tank 400 according to the fourth embodiment of the present invention is inside A body member 110 having an accommodation space 110a for receiving or storing liquefied gas and protruding along the circumferential direction on the inner circumferential surface 111 of the body member 110 to suppress the flow or fluctuation of the liquefied gas It may be provided by including a sloshing reducing member 420 that is formed to bend and extend in a wave shape.

Among the descriptions of the liquefied gas storage tank 400 according to the fourth embodiment of the present invention described below, liquefied gas storage tank according to the first embodiment of the present invention described above, except for the case of additional description with separate reference numerals. It is the same as the description for (100), and the description is omitted to prevent duplication of contents.

The sloshing reduction member 420 extends along the circumferential direction on the inner circumferential surface 111 of the body member 110, and has a wavy waveform to more stably absorb and reduce the sloshing load caused by the flow of liquefied gas. can be provided with As the sloshing reducing member 420 extends in a wave shape to correspond to the wave shape of the fluid, the sloshing load generated by the flow of liquefied gas can be smoothly distributed over a wide area and a constant sloshing cycle. It is possible to more effectively absorb and suppress the sloshing phenomenon by dissolving the In addition, as the area where the first rib 121 contacts the inner circumferential surface 111 of the body member 110 is enlarged, the rigidity of the body member 110 may be further increased.

The sloshing reduction member 420 may be continuously extended on the inner circumferential surface 111 of the body member 110 and provided in a closed curve, that is, a ring shape, along the longitudinal direction of the body member 110. A plurality of them may be arranged spaced apart from each other. However, it is not limited thereto, and although not shown in the drawing, the sloshing reducing member 420 may be discontinuously extended only at a specific location where the sloshing load is concentrated on the inner circumferential surface 111 of the body member 110. Of course. In addition, although in FIG. 8, the sloshing reducing members 420 are shown as being arranged in four rows on the body member 110, the position and number are not limited, and the standard of the liquefied gas storage tank 400 or the liquefied gas Depending on the operating environment, such as the liquefaction point, the number and location can be variously changed.

Hereinafter, the liquefied gas storage tank 500 according to the fifth embodiment of the present invention will be described.

9 is a cross-sectional view showing a sloshing reducing member 520 according to a fifth embodiment of the present invention. Referring to FIG. 9, the load applied to the sloshing reducing member 520 by the flowing liquefied gas is alleviated. An opening 525 formed through the first rib 121 may be further included.

The sloshing reducing member 520 according to the fifth embodiment of the present invention described below can be applied to the sloshing reducing members 120 and 420 according to the first to fourth embodiments of the present invention described above, Except for the description of the opening 525 to be described later, since it is the same as the above description, the description is omitted to prevent duplication.

An opening 525 may be provided in the first rib 121 so that both sides of the sloshing reducing member 520 communicate with each other. A plurality of openings 525 may be provided along the circumferential direction of the first rib 121, and may be formed to pass through in the direction of the sloshing load, that is, in the horizontal direction, for smooth passage of the liquefied gas. The opening 525 passes through a portion of the liquefied gas directed to the sloshing reducing member 520, in particular, the first rib 121 where the load is concentrated and disposed orthogonally to the direction of action of the sloshing load, and transfers it to the opposite side, thereby liquefying. Structural stability may be promoted by alleviating the load applied to the first rib 121 by the gas flow and preventing the load from being concentrated on a specific part.

The liquefied gas storage tanks 100, 200, 300, 400, and 500 according to the present embodiment are provided with sloshing reducing members 120, 420, and 520 having a simple structure by replacing the conventional swash bulkhead. The manufacturing process of the storage tanks 100, 200, 300, 400, and 500 can be simplified and manufacturing costs can be reduced. In addition, since the rigidity of the liquefied gas storage tanks (100, 200, 300, 400, 500) is secured, structural stability can be promoted, and the sloshing load can be stably absorbed and reduced without a large and heavy swash bulkhead. can be reduced in weight, which can improve the efficiency of operation and handling.

100, 200, 300, 400, 500: liquefied gas storage tank
110: body member 110a: accommodation space
111: inner circumference 120, 420, 520: sloshing reducing member
121: first rib 122: second rib
525: opening

Claims (13)

A cylindrical body member having a liquefied gas receiving space provided therein and extending in a horizontal direction; and
It protrudes on the inner circumferential surface of the body member, extends intermittently along the circumferential direction perpendicular to the longitudinal direction of the body member, and suppresses the flow or fluctuation of liquefied gas acting in the horizontal direction along the longitudinal direction of the body member Including; a plurality of sloshing reducing members,
The sloshing reducing member
A first rib having an outer end supported on an inner circumferential surface of the body member and extending in a vertical direction;
A second rib extending in a horizontal direction from an inner end of the first rib;
An opening formed through the first rib along the longitudinal direction of the body member,
It is selectively disposed to occupy about half of the inner circumference of the body member on one of the upper and lower surfaces of the inner circumferential surface of the body member,
A plurality of rows are provided spaced apart from each other along the longitudinal direction of the body member,
The liquefied gas storage tank wherein the plurality of rows of sloshing reducing members are arranged alternately with each other on the upper surface and the lower surface. delete delete delete delete A cylindrical body member having a liquefied gas receiving space provided therein and extending in a horizontal direction; and
It protrudes on the inner circumferential surface of the body member, extends intermittently along the circumferential direction perpendicular to the longitudinal direction of the body member, and suppresses the flow or fluctuation of liquefied gas acting in the horizontal direction along the longitudinal direction of the body member Including; a plurality of sloshing reducing members,
The sloshing reducing member
A first rib having an outer end supported on an inner circumferential surface of the body member and extending in a vertical direction;
A second rib extending in a horizontal direction from an inner end of the first rib;
An opening formed through the first rib along the longitudinal direction of the body member,
It is selectively disposed on any one of the upper and lower surfaces, one side and the other side of the inner circumferential surface of the body member,
A plurality of rows are provided spaced apart from each other along the longitudinal direction of the body member,
The plurality of rows of sloshing reducing members are sequentially arranged on the upper surface portion, the one side surface portion, the lower surface portion, and the other side surface portion. delete According to claim 1,
The sloshing reducing member
A liquefied gas storage tank extending in a wave form along a circumferential direction perpendicular to the longitudinal direction of the body member. delete delete delete According to claim 1,
the opening
A plurality of liquefied gas storage tanks formed through the first rib along the circumferential direction. According to any one of claims 1, 6, 8, 12,
The sloshing reducing member
Liquefied gas storage tank provided to replace the swash bulkhead.

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