KR20160061096A

KR20160061096A - A tank for storing liquid

Info

Publication number: KR20160061096A
Application number: KR1020140163575A
Authority: KR
Inventors: 권오철
Original assignee: 주식회사 현대미포조선
Priority date: 2014-11-21
Filing date: 2014-11-21
Publication date: 2016-05-31

Abstract

The present invention relates to a liquid storage tank for improving the internal structure of a liquid storage tank to reduce a sloshing problem, and a liquid storage tank mounted on a floating body for storing liquid, comprising: a storage body for storing a liquid; A ring-shaped partition wall center member disposed inside the storage body and dividing an inner space of the storage body; and a bridge member connecting the center of the partition wall and the inner surface of the storage body; And a liquid storage tank.

Description

[0001] A TANK FOR STORING LIQUID [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid storage tank installed in a marine suspended body suspended or floating on the sea, and more particularly, to a liquid storage tank for improving the internal structure of a liquid storage tank to reduce a sloshing problem .

In Korean Patent No. 10-1416872, generally, a liquefied gas is a liquid made by cooling or compressing a gaseous compound or a mixture, such as liquefied natural gas, liquid oxygen, and liquid ammonia. The liquefied gas as described above can be stored in a liquid state in a storage tank excellent in heat insulation and insulation. For example, the storage tank is often called a membrane (Membrane) system in which a low-temperature resistant barrier is interposed between the barrier and a heat insulating material to prevent brittle fracture due to cryogenic liquefied gas.

The membrane-type storage tank insulation structure is composed of a material that effectively blocks heat transfer and a metal panel that can seal the liquefied gas. The metal material constituting the metal panel is made of a material resistant to low temperature brittleness, It is designed and manufactured so that it can expand and contract in response to changes in temperature and load generated when it is injected into or removed from a storage tank.

However, maritime floatation facilities (LNG, LNG-RV, LPG, ETHYLENE, etc.) and liquefied gas storage, production or vaporization facilities, FSRU, FPSO) are subject to fluctuation of the entire structure by the sea state, that is, waves or sea breezes, and the liquefied gas stored in the storage tank flows together by the fluctuation of the structure itself. At this time, the flowing liquefied gas strikes the inside of the storage tank, and this phenomenon is called sloshing impact due to sloshing.

Damage to the inside of the storage tank due to the sloshing tends to increase as the size of the storage tank becomes larger, which is a limitation on determining the size of the storage tank. Especially, in the case of liquefied gas carriers operating in marine floating facilities and marine environments where marine docking is operated for a long time in a specific sea area, the restriction due to such sloshing is a very important design factor.

Accordingly, in order to reduce the impact force by the sloshing, a partition wall is provided at an inner center of the storage tank for storing the liquefied gas to disperse and reduce the flow of the liquefied gas. However, as described above, the interior of the storage tank is partitioned by the partition walls provided inside the storage tank, so that a transfer pump, a valve, and a transfer pipe are required to fill or extract the liquefied gas for each part partitioned by the partition. This will be described with reference to Fig.

1 is a sectional view showing a conventional liquefied gas storage tank. The conventional liquefied gas storage tank has a case 10 in which a storage space for storing liquefied gas is formed, a partition 20 for reducing the flow of liquefied gas inside the case 10, Is installed across the inner center of the case (10).

A pump well 12 having a recessed inner bottom surface of the case 10 is formed below the partition wall 20 and a transfer pipe 30 and a transfer pump 30 are connected to the pump well 12. [ 40 are installed to supply or discharge the liquefied gas to the storage space of the case 10. [

A connecting pipe 22 and a valve 24 are installed in the partition 20 installed across the center of the case 10 so that the liquefied gas flows over the partition 20 depending on the storage amount of the liquefied gas .

However, the conventional liquefied gas storage tank as described above includes the transfer pipe 30 and the transfer pump 40 for discharging or supplying the liquefied gas to each of the storage spaces defined by the partition 20 formed across the inside thereof, Should be installed.

In addition, the connection pipe 22 and the valve 24, which flow the liquefied gas to another storage space according to the storage amount of the liquefied gas for each storage space partitioned by the partition 20, .

Therefore, the number of the transfer equipment, the connection pipe 22 and the valve 24 is increased according to the storage space of the case 10. For example, as shown in FIG. 1, at least two or more pairs of conveying devices constituting a pair of conveying pipes 30 and a conveying pump 40 are installed on both sides of a partition wall 20 installed in the storage tank There is a problem in that the installation cost is increased and a lot of time and cost are involved in maintenance / repair.

To solve this problem, Japanese Patent Laid-Open No. 10-1416872 discloses a technique for uniformly puncturing a plurality of through holes on a partition wall.

However, the storage tank of the Japanese Patent No. 10-1416872 has a structure in which the partition wall covers the entire end surface of the storage tank, so that the overall weight becomes heavy, and the strength reinforcement (girder and flat bar) for reinforcing the strength of the partition wall And there is a problem that deformation may occur due to the shrinkage and expansion of the storage tank body.

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above-mentioned problems of the conventional liquid storage tank,

First, the structure of the partition wall is improved to provide a liquid storage tank with a reduced overall weight.

Secondly, the present invention is to provide a liquid storage tank in which the structure of the partition wall portion is improved so as to have its own rigidity and no additional strength reinforcement member is required.

Third, the present invention is to improve the structure of the partition wall portion so as to provide a liquid storage tank in which the partition wall is not affected by contraction / expansion of the storage tank body.

The present invention relates to a liquid storage tank mounted on a marine floating body for storing liquid, comprising: a storage body for storing a liquid; A ring-shaped partition wall central member disposed inside the storage body and dividing an internal space of the storage body; and a bridge member connecting the partition wall central member and the inner surface of the storage body; And a liquid storage tank.

Preferably, the storage body has a rectangular shape having a long axis, and the partition wall central member may be disposed in a width direction perpendicular to the long axis of the storage body.

The bridge member may be bent and formed in a plurality of radial shapes about the partition wall central member, and may include a vacuum ring member having both ends connected to each other between the bridge member and the inner surface of the storage body. .

According to the present invention, the structure of the partition wall portion can be improved to a simple structure to provide a liquid storage tank with a reduced overall weight. Further, it is possible to provide the liquid storage tank having the structure of the partition wall with its own rigidity and having a safe structure without any additional strength reinforcement.

In addition, the present invention improves the structure of the partition wall portion and the coupling structure between the partition wall portion and the storage tank body, thereby providing a liquid storage tank in which the partition wall portion is not affected by contraction / expansion of the storage tank body.

1 is a cross-sectional view of a conventional liquid storage tank.
2 is an internal perspective view of a liquid storage tank according to an embodiment of the present invention.
3 is a front sectional view of a liquid storage tank according to an embodiment of the present invention.
4 is a cross-sectional view of the "AA" part of Fig.
5 is a side cross-sectional view of a liquid storage tank according to an embodiment of the present invention.
6 is a front sectional view of a liquid storage tank according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

2 to 5, a liquid storage tank 100 according to an embodiment of the present invention includes a storage body 110 and a partition 120.

The storage body 110 forms a storage space for storing liquid therein. In the storage space, liquefied gas is stored, for example, liquefied petroleum gas, liquefied natural gas, liquid nitrogen, liquid oxygen, and the like.

The storage body 110 is mounted on a marine artifact. In the present specification, marine artifacts are used to store, produce or vaporize liquefied gas carriers (LNG vessels, LNG-RV vessels, LPG vessels, ETHYLENE vessels, etc.) and anchored liquefied gas (FSRU, FPSO) equipped with a ship.

The storage body 110 has a rectangular shape having a long axis along the longitudinal direction of the marine artifact, and the front and rear surfaces are hemispherical to seal the interior.

The storage body 110 of the present embodiment has a cylindrical shape. However, the storage body 110 may have a shape other than the cylindrical shape as long as it can store liquid gas therein.

The partition wall portion 120 includes a partition wall central member 121 and a bridge member 122.

The partition wall central member 121 is formed in a ring shape having an opening in the center of the disk and is arranged in the width direction inside the storage body 110 to divide the internal space of the storage body 110.

Accordingly, the partition wall central member 121 can attenuate the sloshing phenomenon caused by the liquid gas stored in the storage body.

Generally, the maximum sloshing in the tank occurs in the major axis direction (longitudinal direction), so that the partition wall central member 121 is installed in the width direction perpendicular to the longitudinal axis direction (longitudinal direction) of the storage body.

One end of the bridge member 122 is connected to the partition wall central member 121 and the other end is connected to the storage body 110 to support the partition wall central member 121.

The bridge member 122 is formed in a plurality of radial shapes around the partition wall central member 121 to stably support the partition wall central member 121 to maintain its own rigidity so that no additional reinforcement member is required .

In addition, the bridge member 122 is formed to be roundly bent in one direction so that when the storage body shrinks / expands due to liquid gas. By absorbing the displacement of the storage body, the partition wall central member 121 is not affected by the contraction / expansion of the storage body 110. In the present embodiment, the bridge member 122 is formed to be bent, but when viewed from the side, if the partition wall central member is positioned forward or rearward than the engagement portion of the bridge member and the storage body, Or may be formed in other shapes.

The partition wall 120 of the present embodiment including the partition wall central member 121 and the bridge member 122 is advantageous in that the structure is very simple and the weight saving effect is large.

Referring to FIG. 4, a vacuum ring member 130 is formed between the bridge member 122 and the inner surface of the storage body 110.

One end of the bridge member 122 is engaged with the inner side of the vacuum ring member 130 and the outer side of the vacuum ring member 130 is engaged with the inner side of the storage body 110. The liquid storage tank 100 of the present embodiment is advantageous in that the bridge member is structurally deformable so that a connection spring between the partition wall and the storage body required in the conventional barrier rib installation structure is not separately required.

In addition, the liquid storage tank 100 according to the present embodiment has a structure in which the bridge member 122 supports the partition wall central member 121, so that even if the shape of the storage body is changed, It is possible to provide liquid storage tanks of various shapes.

6 is a front sectional view of a liquid storage tank 200 according to another embodiment of the present invention. Referring to FIG. 6, the storage body 210 is formed by attaching two cylinders instead of one cylinder. In the storage body 210, two partition wall central members 221 are formed, and a bridge member 222 having a radial shape centered on each of the partition wall central members is formed.

Even when the shape of the storage body is deformed as described above, the partition wall central member can be easily installed without deforming the partition wall central member.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims

CLAIMS 1. A liquid storage tank mounted on a floating body for storing liquid,
A storage body for storing liquid; And
A ring-shaped partition wall central member disposed inside the storage body and dividing an internal space of the storage body; and a bridge member connecting the partition wall central member and the inner surface of the storage body;
A liquid storage tank

The method according to claim 1,
Wherein the storage body has a rectangular shape having a long axis,
Wherein the partition wall central member is disposed in a width direction perpendicular to a long axis of the storage body,

The method according to claim 1 or 2,
Wherein the bridge member is formed by bending, and a plurality of bridging members are formed radially about the partition wall central member.

The method according to claim 1,
And a vacuum ring member to which both ends are respectively coupled between the bridge member and the inner surface of the storage body.