KR101629348B1

KR101629348B1 - Transverse corner structure for LNG storage tank

Info

Publication number: KR101629348B1
Application number: KR1020090112335A
Authority: KR
Inventors: 이병윤; 조민호; 현재균
Original assignee: 대우조선해양 주식회사
Priority date: 2009-11-20
Filing date: 2009-11-20
Publication date: 2016-06-10
Also published as: KR20110055780A

Abstract

The present invention relates to a transverse corner structure of a liquefied gas storage tank. The transverse corner structure of the liquefied gas storage tank includes an inlet tube for transmitting a force generated from a tank to a ship; A plurality of connection units for discontinuously connecting the invava tube to the corner portion of the hull; And an insulation member provided between the invar tube and the corner portion.

According to this configuration, the structure is simplified by connecting the invar tube discontinuously to the corner of the hull using a connecting unit such as an SUS plate, the installation of the insulation member is facilitated, the amount of welding is reduced, Thereby saving money and time and improving productivity.

Invar tube, connection unit, SUS plate, connection piece, insulation member

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transverse corner structure for a liquefied gas storage tank,

The present invention relates to a transverse corner structure of a liquefied gas storage tank, in which a structure is simplified by discontinuously connecting an inlet tube to a corner of a hull using a connecting unit such as an SUS plate, To a transverse corner structure of a liquefied gas storage tank.

In general, Liquefied Natural Gas (hereinafter referred to as " LNG ") is a colorless transparent cryogenic liquid having a volume of about 1/600 reduced by cooling a natural gas containing methane as a main component at a low temperature of -162 & Which is advantageous for transportation and storage of natural gas.

In order to use these LNGs as energy resources, LNG carriers are needed to transport large quantities from the production bases to the acquisition sites of the demand sites. The LNG carrier is a liquefied natural gas which is liquefied in the cargo tank at a cryogenic temperature at the loading port, which is the natural gas producing place. After reaching the unloading port, the LNG carrier vaporizes the cryogenic LNG And converts it into natural gas, and supplies it to the customer or the customer through piping or the like.

In order to keep the LNG carrier at such a low temperature, the LNG carrier has to have a very high thermal insulation structure. In particular, since the corner portion of the cargo tank may cause stress concentration, The transverse corner structure of the liquefied gas storage tank according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a transverse corner structure of a liquefied gas storage tank according to a related art, and FIG. 2 is a cross-sectional view showing a transverse corner structure of a liquefied gas storage tank according to a conventional technique. As shown in the drawing, the transverse corner structure of the liquefied gas storage tank according to the related art is constructed by an invar strip 11a and an anchoring bar 11b, An insulation box 12 is provided between the inlet tube 11 and the corner 20 as well as the inside of the inlet tube 11. The insulation box 12 is fixed to the corner portion 20, And an insulation 13 is provided between the corner portion 20 of the hull.

The transverse corner structure of the liquefied gas storage tank according to the related art is such that the inlet tube 11 is continuously fixed to the corner portion 20 by the inlet strip 11a and the anchoring bar 11b, To the hull.

However, the transverse corner structure of the liquefied gas storage tank according to this conventional technique has a structure in which the inlet tube 11 is continuously connected to the ship 20 by the inlet strip 11a and the anchoring bar 11b The structure is complicated, and it is difficult to install the insulation box 12 and the insulation 13, and it has a problem that it takes much time and cost to manufacture.

SUMMARY OF THE INVENTION The present invention has been developed in order to solve the above-mentioned problems, and it is an object of the present invention to simplify the structure by improving the productivity and to facilitate the installation of the insulation member by connecting the invat tube discontinuously to the corner portion of the hull, And save time and money.

According to an aspect of the present invention, there is provided a transverse corner structure of a liquefied gas storage tank, comprising: an inlet tube for transmitting a force generated from the storage tank to a ship; A plurality of connecting units for discontinuously connecting the invat tube to a corner of the hull; An insulation member installed between the inlet tube and the corner; And a transversal corner structure of the liquefied gas storage tank is provided.

The connecting unit may be installed to form a plurality of rows along the longitudinal direction of the invar tube.

It is preferable that the connection unit is made of an SUS plate.

The SUS plate preferably includes connecting pieces provided at both ends to mediate connection between the corner portion and the invar tube.

The insulation member may include a box-shaped insulation installed between the connection units disposed along the longitudinal direction of the invar tube, and a plurality of connection members provided between the connection units arranged to face each other along the width direction of the invar tube It is preferable to include a flexible insulation.

Preferably, the insulation member further comprises another flexible insulation extending parallel to the inside of the corner of the corner portion.

According to another aspect of the present invention, there is provided a transverse corner structure of a liquefied gas storage tank, in which an inlet tube is discontinuously connected to a corner of a hull, and an insulation member is installed between the inlet tube and the corner A transverse corner structure of the liquefied gas storage tank is provided.

According to the transverse corner structure of the liquefied gas storage tank of the present invention, the structure is simplified by facilitating the installation of the insulation member by discontinuously connecting the invar tube to the corner portion of the hull using a connecting unit such as an SUS plate Thereby reducing the amount of welding, thereby saving the manufacturing cost and time and improving the productivity.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, embodiments of the present invention are provided to explain the present invention more fully to those skilled in the art, and the following embodiments can be modified into various other forms, Is not limited to the following examples.

FIG. 3 is a perspective view showing a transverse corner structure of a liquefied gas storage tank according to the present invention, and FIG. 4 is a side view showing a transverse corner structure of a liquefied gas storage tank according to the present invention.

As shown, the transverse corner structure of the liquefied gas storage tank according to the present invention includes an invar tube 110, a plurality of discs 110 that discontinuously connect the invar tube 110 to the corner 200 of the hull, A connection unit 120 and insulation members 130, 140 and 150 installed between the inlet tube 110 and the corner 200. Therefore, the transverse corner structure of the liquefied gas storage tank according to the present invention is constructed such that the inlet tube 110 is discontinuously connected to the corner 200 of the hull, and between the inlet tube 110 and the corner 200 of the ship The insulation members 130, 140 and 150 are installed.

The inlet tube 110 is connected discontinuously by the connecting unit 120 to the corner portion 200 of the hull, i.e., the transverse corner, to transmit the force generated from the tank in which the LNG is stored to the hull . In addition, the thickness of the conventional invar tube is about 1.5 mm, and the thickness of the invar tube 110 according to the present invention is preferably 2.5 to 3.5 mm, more preferably 3 mm.

The connection unit 120 is formed in a plurality of units to discretely connect the inlet tube 110 to the corner portion 200 of the hull to simplify the structure and facilitate the installation of the insulation members 130, 140 and 150. The connection unit 120 is preferably installed in a plurality of rows along the longitudinal direction of the invar tube 110 to stably fix the invar tube 110 to the corner 200 of the hull as in the present embodiment .

Also, the connection unit 120 is preferably made of a plate made of SUS, that is, an SUS plate. In addition, the connection unit 120 formed of such an SUS plate can be fixed to the corner portion 200 and the invar tube 110 of the hull by using a fixing member on both sides thereof. On the other hand, And can be fixed to the corner portion 200 and the invar tube 110, respectively.

The connecting unit 120 formed of the SUS plate includes connecting pieces 121 and 122 for mediating the corner 200 of the hull and the inlet tube 110 to more easily install the inlet tube 110 on the corner 200 of the hull, Are preferably provided at both ends, respectively. Here, the connecting pieces 121 and 122 serve as intermediaries for connecting the connecting unit 120 to the corner portion 200 and the invar tube 110 of the hull using welding or other fixing members.

The insulation members 130, 140 and 150 have an insulation function for maintaining the LNG at a temperature of minus 163 ° C. The insulation members 130, 140 and 150 include a box-shaped insulation 130 installed between the connection units 120 arranged in the lengthwise direction of the invar tube 110, (140) arranged between the connection units (120) arranged in the width direction of the housing (110). Accordingly, the open space can be prevented from being generated by the box-type insulation 130 and the flexible insulation 140. [

As shown in FIG. 5, the box-shaped insulation 130 has a shaped structure, so that it can be easily manufactured into a product satisfying a predetermined quality and is fixed to the corner portion 200 of the hull by the fixing member 131 , Not only between the connection units 120 arranged in the longitudinal direction of the invar tube 110 but also inside the invar tube 110.

6, the flexible insulation 140 is an amorphous insulating material such as a glass wool or the like, as is the case between the connecting units 120 arranged in the width direction of the inlet tube 110 and facing each other The installation of the box-shaped insulation 130 can be easily installed in a limited space. In addition, a flexible insulation 150 extending parallel to the inlet tube 110 is installed inside the corner of the corner 200 of the hull.

The operation of the transverse corner structure of the liquefied gas storage tank according to the present invention will now be described.

The structure is simplified by discontinuously connecting the inlet tube 110 to the corner portion 200 of the hull by using the connection unit 120 such as the SUS plate and the installation of the insulation members 130, it is possible to prevent the generation of open space.

In addition, since the structure is simplified and the amount of welding is reduced, the manufacturing cost and time can be saved, and the productivity can be improved.

Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the appended claims and equivalents thereof.

1 is a perspective view showing a transverse corner structure of a liquefied gas storage tank according to a conventional technique.

2 is a cross-sectional view showing a structure of a transverse corner of a liquefied gas storage tank according to a conventional technique.

3 is a perspective view showing a transverse corner structure of a liquefied gas storage tank according to the present invention.

4 is a side view showing a transverse corner structure of a liquefied gas storage tank according to the present invention.

5 is a sectional view showing a structure of a transverse corner of a liquefied gas storage tank according to the present invention.

6 is a cross-sectional view showing the transverse corner structure of the liquefied gas storage tank according to the present invention in another position.

Description of the Related Art

110: Invar tube 120: Connection unit

121, 122: connecting piece 130: box-shaped insulation

131: Fixing member 140,150: Flexible insulation

Claims

In the transverse corner structure of the liquefied gas storage tank,

An inlet tube for transmitting a force generated from the storage tank to the hull;

A plurality of connecting units for discontinuously connecting the invat tube to a corner of the hull;

An insulation member installed between the inlet tube and the corner;

/ RTI >

The insulation member may include a box-shaped insulation installed between the connection units disposed along the longitudinal direction of the invar tube, and a plurality of connection members provided between the connection units arranged to face each other along the width direction of the invar tube And a flexible insulation. The transverse corner structure of the liquefied gas storage tank is characterized in that it includes flexible insulation.

The method according to claim 1,

Wherein the connection unit is installed to form a plurality of rows along the longitudinal direction of the invar tube.

The method according to claim 1 or 2,

Wherein the connection unit is made of an SUS plate.

The method of claim 3,

Wherein the SUS plate includes a connecting piece provided at both ends to mediate connection between the corner portion and the inlet tube.

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The method according to claim 1,

Wherein the insulation member further comprises another flexible insulation extending parallel to the inlet tube inside the corner of the corner. &Lt; RTI ID = 0.0 > < / RTI >

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