KR101814620B1 - setting apparatus of liquefied natural gas storage tank and construction method for liquefied natural gas storage tank insulation structure using the same - Google Patents

Abstract

Disclosed is a setting device installed between upper insulation boards of a liquefied natural gas cargo hold. A setting device according to an embodiment of the present invention includes: a support bar installed across upper insulation boards and supporting an auxiliary secondary barrier or connection board attached between upper insulation boards; And fixing brackets detachably attached to the upper heat insulating boards and to which both ends of the supporting bars are fixed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a setting device for a liquefied natural gas storage window, and a method for installing a liquefied natural gas storage tank using the same,

More particularly, the present invention relates to a setting device for a liquefied natural gas cargo hold and a method of constructing a heat insulating structure of a liquefied gas cargo hold using the same.

Natural gas is transported in the form of gas via land or sea gas pipelines, or transported to a remote location where it is stored in an LNG carrier in the form of liquefied natural gas (hereinafter referred to as LNG). Liquefied natural gas is obtained by cooling natural gas at a cryogenic temperature of -163 ° C, and its volume is reduced to approximately 1/600 of that of natural gas, making it well suited for long distance transportation through the sea.

Generally, LNG carrier for loading LNG on land by carrying LNG, and LNG carrier for loading LNG on land, and LNG RV (Regasification Vessel) sms, and an LNG storage tank capable of withstanding the cryogenic temperature of the LNG (hereinafter referred to as a storage tank for convenience).

Recently, demand for floating floating structures such as LNG FPSO (Floating, Production, Storage and Offloading) and LNG FSRU (Floating Storage Regasification Unit) has been gradually increasing. In addition, floating LNG carrier or LNG RV A storage tank to be installed is mounted. On the other hand, the cryogenic storage tank (Cargo hold) of LNG has a unique insulation structure to protect the hull at low temperature.

1 is an exploded perspective view showing a heat insulating board installation structure of a conventional liquefied natural gas storage tank.

1, a conventional LNG storage tank has a structure having a secondary barrier, a plurality of lower heat insulation boards 2 are installed on an inner hull 1, 3) is installed. Then, the secondary barrier 4 is attached using glu between the adjacent lower insulating boards 2.

Then, the connection board 5 is installed on the installed secondary barrier 4. At this time, the glue is applied to the lower portion of the connection board 5 to be installed on the secondary barrier 4. However, since the secondary barrier 4 is a metal plate and the lower part of the connection board 5 is made of polyurethane foam (PUF), adhesion between the secondary barrier 4 and the connection board 5 is poor There is a problem that the connecting board 5 can not be firmly fixed to the lower heat insulating board 4.

In addition, if a problem arises in the secondary barrier 4, the connection board 5 must be cut to repair it. Since the glue sticking on the secondary barrier 4 can not be easily removed, the operation is not easy, There is a problem of delay.

On the other hand, Korean Patent Laid-Open Publication No. 2009-0096901 discloses a cargo hold insulation structure of a liquefied natural gas carrier, a manufacturing method thereof, and a manufacturing apparatus.

However, the above-mentioned patent document also discloses a structure in which an epoxy secondary barrier (corresponding to the secondary barrier) is attached and a top insulation panel (corresponding to the connection board) is provided on the secondary secondary barrier by epoxy glue There is the same problem with.

Patent Document 1: Korean Patent Publication No. 2009-0096901 (2009.09.15. Disclosed)

An embodiment of the present invention provides a setting device for a liquefied natural gas cargo hold that can attach an auxiliary secondary barrier and a connection board to a space between upper insulation boards without installing fasteners on the upper insulation board, To provide a method of constructing a heat insulating structure.

The objects of the present invention are not limited thereto, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a support bar for supporting an auxiliary secondary barrier or a connection board installed across the upper insulating boards and attached between the upper insulating boards; And fixing brackets detachably attached to the upper heat insulating boards and to which both ends of the supporting bars are fixed.

The fixing bracket may be fixedly inserted into a fitting groove formed at an upper end of the upper heat insulating board.

In addition, the fixing bracket may include a fixed end fixed to the fitting groove formed at the upper end of the upper heat insulating board. An extension extending from the fixed end and protruding from the upper surface of the upper heat insulating board; And a support end extending from the extended end to support the upper surface of the support bar.

In addition, the fixing bracket may be provided on both sides of the fixed end with respect to the extended end.

In addition, the fixing bracket may be provided on both sides of the support end about the extended end.

The fixing bracket may further include a stopper member for preventing a positional change of the fixing bracket inserted into the upper heat insulating board.

Further, the stopper member has a fastening end protruding from one side of the extending end adjacent to the upper surface of the upper heat insulating board, And a fastening member inserted into the fastening hole and fixed to the upper heat insulating board.

The length of the extending end may be varied to adjust the height of the supporting end.

The wedge may further include a wedge inserted between the support bar and the connection board.

Further, the support bar may be provided with a groove into which the wedge is fitted.

In addition, the support bar may be fixed to the support end of the fixing bracket by a fastening member.

Further, the support bar and the fixing bracket may be integrally provided.

According to an aspect of the present invention, there is provided a method of manufacturing a semiconductor device, comprising: installing upper insulating boards on top of lower insulating boards; Installing an auxiliary secondary barrier on the lower insulating boards on an upper surface to which the upper insulating boards are not attached; And installing a connection board on the secondary secondary barrier; Wherein said secondary secondary barrier mounting step comprises applying an adhesive on an upper surface to which said upper insulating boards are not attached; Attaching the auxiliary secondary barrier to the portion to which the adhesive is applied; Positioning a pressurizing device on the secondary secondary barrier; And installing a setting device according to any one of claims 1 to 12 on the upper heat insulating board to support the pressurizing device. have.

In addition, the connecting board installing step may include: applying an adhesive on the secondary secondary barrier; Attaching the connection board to the portion to which the adhesive is applied; And mounting the setting device according to any one of claims 1 to 12 on the upper heat insulating board to support the upper surface of the connecting board.

The upper insulating board may include an upper insulating member protecting plate provided on an upper surface thereof; A slot formed at a certain depth from the upper surface to prevent deformation due to thermal contraction and thermal expansion; And a fitting groove formed at a lower portion of the upper insulating member protecting plate so as to be connected to the slot, into which the fixing bracket of the setting device is inserted.

Embodiments of the present invention can provide an auxiliary secondary barrier and a connection board without installing fasteners on the upper insulation board by installing grooves on the upper insulation board to provide a setting device.

1 is an exploded perspective view showing a heat insulating board installation structure of a conventional liquefied natural gas storage tank.
2 is a view showing a heat insulating structure and a setting device of a liquefied natural gas cargo hold according to a first embodiment of the present invention.
Figure 3 is a cross-sectional view showing the secondary secondary barrier being installed between the upper insulation boards.
4 is a cross-sectional view showing that the connecting board is installed on the secondary secondary barrier.
5 is a view showing a setting apparatus according to the second embodiment.
6 is a view showing a setting apparatus according to the third embodiment.
7 is a view showing a setting apparatus according to the fourth embodiment.
8 is a view showing a setting apparatus according to the fifth embodiment.
9 is a view showing a setting apparatus according to the sixth embodiment.
10 is a view showing a setting device according to the seventh embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 2 is a view showing a heat insulating structure and a setting device of a liquefied natural gas cargo hold according to a first embodiment of the present invention, FIG. 3 is a sectional view showing that an auxiliary secondary barrier is installed between upper insulating boards, Is a cross-sectional view showing that the connection board is installed on the secondary secondary barrier.

2 to 4, a heat insulating structure 10 of a liquefied natural gas storage tank according to a first embodiment of the present invention includes a heat insulating board 100, a filling member 13 and a top bridge board ) ≪ / RTI > Although not shown in the drawing, the apparatus may further include a primary barrier fixed on the upper insulating board 130 and the connection board 150. However, since the primary barrier can use various techniques known in the application, Detailed description thereof will be omitted.

The thermal insulation board 100 includes a bottom insulation board 110, a primary secondary barrier 120, a top insulation board 130 and an auxiliary secondary barrier 140.

The lower heat insulating board 110 may be fixed to the inner surface of the inner hull 20 through various fastening means (not shown) and may include a lower heat insulating member protecting plate 111 and a lower heat insulating member 112 do. The lower insulation board 110 is an insulation board positioned between the inner hull 20 and the primary secondary barrier 120.

The lower heat insulating member protecting plate 111 is located at the lowermost position to support the heat insulating board 100 and is fixed to the inner surface of the inner hull 20 through various fastening means. The lower insulation member 112 is made of a polyurethane foam (PUF) and is attached on the lower insulation member protection plate 111 using an adhesive to protect the inner hull 20 from the cryogenic LNG. Glue may be used for the adhesive.

The upper insulating board 130 is attached on the lower insulating board 110 and includes an upper insulating member protecting plate 131 and an upper insulating member 132. The upper insulation board 130 is an insulation board positioned between the primary secondary barrier 120 and the primary barrier.

The upper heat insulating member 132 is made of a polyurethane foam material (PUF) like the lower heat insulating member 112 and is attached to the lower heat insulating member 112. The upper and lower heat insulating members 132, Enhancement and stability.

Particularly, the upper heat insulating board 130 according to the embodiment of the present invention is formed in a polyhedral shape smaller than the lower heat insulating board 110, and a first fault surface 133 is formed at the upper edge of the upper insulating board 130 as shown in FIGS. .

The upper insulating member protecting plate 131 is attached to the upper part of the upper insulating member 132 through an adhesive so that the load of the cargo is dispersed so as not to be concentrated on a specific portion of the upper insulating member 132.

The lower insulation board 110 and the upper insulation board 130 may be manufactured in advance in a shop and may be supplied to the interior of the storage tank and the lower insulation board 110 may be installed in the inner hull 20, And are spaced apart from each other with a space for inserting a filling member 13 such as a glass wool. The filling member 13 is inserted into the space between the lower heat insulating boards 110 arranged to maintain the heat insulating performance.

The secondary barrier includes a primary secondary barrier 120 installed on the upper surface of the lower insulating board 110 and having a buffering action between the lower insulating board 110 and the upper insulating board 130, And an auxiliary secondary barrier 140 installed on top of the first and second barrier ribs 110.

At this time, the auxiliary secondary barrier 140 is overlapped with part of the main secondary walls 120 on both sides to seal between the heat insulating boards 110 and 130.

In addition, the lower insulating board 110, the main secondary wall 120, and the upper insulating board 130 are sequentially stacked to form a unit body.

The connection board 150 is installed in a space between adjacent upper insulation boards 130 and is horizontal with the upper insulation board 130 and includes a connection member protection plate 151 and a connection member 152 .

The connection member protection plate 151 is attached to the upper portion of the connection member 152 through an adhesive like the upper insulation member protection plate 131 to protect the connection member 152 from the load of the cargo. Here, the connection member protection plate 151 and the above-described lower insulation member protection plate 111 and the upper insulation member protection plate 131 may be made of plywood.

The setting device 200 is used when an auxiliary secondary barrier 140 and a connection board (shown in FIG. 4) are to be installed in the space between the upper insulating boards 130.

The upper insulating board 130 has a fitting groove 136 into which the fixing bracket 220 of the setting device 200 can be fixed. The fitting groove 136 is connected to the slot 134 formed at a predetermined depth from the upper surface of the upper heat insulating board 130. The slots 134 are provided for preventing deformation due to heat shrinkage and thermal expansion of the upper heat insulating board 130. The fitting groove 136 is horizontally provided below the upper heat insulating member protecting plate 131. The slot 134 and the fitting groove 136 are formed by being cut from the end of the upper heat insulating board 130 and provided along the horizontal and vertical directions of the upper heat insulating board 130.

Referring again to FIG. 2, the setting device 200 includes a support bar 210 and a pair of fixing brackets 220. The support bars 210 are installed across the upper insulating boards 130. Both ends of the support bar 210 are fixed to the fixing bracket 220. The fixing bracket 220 is installed on the upper heat insulating board 130. The support bar 210 is in the form of a rod having a rectangular cross section.

The stationary bracket 220 has a "C" shaped cross-section including a fixed end 222, an extended end 224 and a support end 226. The fixed end 222 is secured to the upper, And is fitted and fixed in the fitting groove 136 formed in the lower portion of the protective plate 131. The extending end 224 extends in the vertical direction from the fixed end 222 and projects to the upper surface of the upper heat insulating board 130. The supporting end 226 Extends from the extension end 224 to support the upper surface of the support bar 210.

2, reference numeral 300 denotes a pressurizing device for pressing the auxiliary secondary barrier 140 at an upper portion thereof. The pressurizing device 300 includes an airbag 310 and a back pressure board 320.

3 is a sectional view showing that the auxiliary secondary barrier 140 is installed between the upper insulating boards 130 and FIG. 4 is a sectional view showing that the connecting board 150 is installed on the auxiliary secondary barrier 140 to be.

3 and 4, in the heat insulating structure 10 of the liquefied gas holding space 10, the lower heat insulating boards 110 are connected to the inner hull 20 by various fastening means (not shown) through the lower heat insulating member protecting plate 111 . A primary secondary barrier 120 is interposed on the upper portion of the lower insulation board 110. The upper heat insulating board 130 is installed on the upper side of the lower heat insulating board 110. A filling member 13 made of glass wool is installed in a space formed between the lower heat insulating boards 110 when the lower insulating board 110 is arranged. An auxiliary secondary barrier 140 and a connection board 150 are installed in a space between the upper insulating boards 130 facing each other.

The installation process of the auxiliary secondary barrier 140 will be described with reference to FIG. First, the adhesive is applied to the upper surface of the primary secondary barrier 120 exposed through the space between the upper insulating boards 130. And the auxiliary secondary barrier 140 is attached to the portion to which the adhesive is applied. Thereafter, the pressurizing device 300 constituted by the airbag 310 and the back pressure board 320 is placed on the secondary secondary barrier 140. The setting device 200 is installed on the upper heat insulating board 130 to support the pressurizing device 300. Both ends of the support bar 210 are fixed to the fixing bracket 220 and the fixing bracket 220 is fixed to the fitting groove 136 formed in the upper heat insulating board 130. When the installation of the setting device 200 is completed, air is supplied to the airbag 310 of the pressurizing device 300 to pressurize the auxiliary secondary barrier 140 for a certain period of time (time for curing the adhesive) A barrier 140 is attached on the primary secondary barrier 120.

Referring to FIG. 4, the installation process of the connection board 150 will be described.

First, an adhesive such as epoxy glue is applied to the secondary secondary barrier 140. The connection board 150 is attached to the portion to which the adhesive is applied. The setting device 200 is installed on the upper insulating board 130 so as to press the connecting board 150. The setting device 200 is removed when the connection board 150 is completely attached.

5 to 10 are views showing a setting device according to the second to seventh embodiments.

Referring to FIG. 5, the setting apparatus 200a according to the second embodiment includes a support bar 210 and a fixing bracket 220a. The supporting bar 210 and the fixing bracket 220a may be provided in a similar configuration and function to the supporting bar 210 and the fixing bracket 220 of the setting device 200 shown in FIG.

However, the fixing bracket 220a is partially changed in shape so that the fixing bracket 220a can be more stably fixed to the upper heat insulating board 130. [ The fixed bracket 220a includes a fixed end 222a, an extended end 224 and a support end 226. The fixed end 222a is provided on both sides of the extended end 224. Specifically, the fixed end 222a includes a first fixed end 222-1 provided in the same direction as the supporting end 226, and a second fixed end 222- 2). The fixing bracket 220a according to the present embodiment can more firmly fix the fixing end 222a to the upper heat insulating board 130. [

Referring to FIG. 6, the setting apparatus 200b according to the third embodiment includes a support bar 210 and a fixing bracket 220b. The supporting bar 210 and the fixing bracket 220b may be provided in a similar configuration and function to the supporting bar 210 and the fixing bracket 220a of the setting device 200a shown in FIG.

However, the shape of the support end 226b is partially changed so that the support bracket 220b can support the two support bars 210 in both directions. The fixing bracket 220b includes a fixed end 222a, an extending end 224 and a supporting end 226b. The supporting end 226b has a first supporting end 226- 1) and a second support end 226-2. The fixing bracket 220b according to the present embodiment can support the support bar 210 in both directions or simultaneously.

Referring to FIG. 7, the setting apparatus 200c according to the fourth embodiment includes a support bar 210 and a fixing bracket 220c. The supporting bar 210 and the fixing bracket 220c may be provided in a similar configuration and function to the supporting bar 210 and the fixing bracket 220 of the setting device 200 shown in Fig.

However, the fixing bracket 220c provides a structure that can prevent the positional variation in a state where the fixing bracket 220c is inserted into the upper heat insulating board 130. [ The fixing bracket 220c includes a fixed end 222c, an extending end 224c, a supporting end 226c, and a stopper member 228. [ The stopper member 228 includes a fastening end 228a and a fastening member 228b. The fastening end 228 is provided protruding from one side of the extending end 224c adjacent to the upper surface of the upper heat insulating board 130. [ The fastening member 228b is fitted into the fastening hole and fixed to the upper heat insulating board 130. [ The fastening member 228b may include a bolt, a fixing pin, or the like. Meanwhile, the support bar 210 may be fixed to the support end 226c by a fastening member 229 so as not to be separated from the support bar 210 while being supported by the fastening bracket 220c.

Referring to FIG. 8, the setting device 200d according to the fifth embodiment includes a support bar 210 and a fixing bracket 220d. The supporting bar 210 and the fixing bracket 220d may be provided in a similar configuration and function to the supporting bar 210 and the fixing bracket 220a of the setting device 200a shown in FIG.

However, the fixing bracket 220d is provided with a variable length structure for adjusting the height of the supporting end. The fixed bracket 220d includes a fixed end 232, an extended end 234, and a support end 236. [ The fixed end 232 and the extending end 234 are integrally formed, and the supporting end 236 is bolted to the extending end 234 in a separate configuration. The support end 236 includes a height varying end 238 for fastening the bolt to the extended end 234 and bolt fastening holes 239 are provided at the constant height 238 at regular intervals.

Referring to FIG. 9, the setting apparatus 200e according to the sixth embodiment includes a support bar 210e, a fixing bracket 220, and a wedge 240. The supporting bar 210e and the fixing bracket 220 may be provided in a similar configuration and function to the supporting bar 210 and the fixing bracket 220 of the setting device 200 shown in Fig. The wedge 240 is inserted between the support bar 210e and the connection board 150. The bottom of the support bar 210e is provided with a groove 212 into which the wedge 240 is fitted.

The wedge 240 is used when a gap is generated between the connection board 150 and the support bar 210e. For example, when the top surface height of the connection board 150 is lower than the top surface of the upper insulation board 130, the connection board 150 is not supported by the support bar 210e. In this case, the connection board 150 can be supported by inserting the wedge 240 between the support bar 210e and the connection board 150. Although not shown, the wedge 240 can also be used in the process of installing the secondary secondary barrier 140. In the secondary secondary barrier installation process, the wedge 240 can be inserted between the back pressure board 320 (see FIG. 3) and the support bar 210 (see FIG. 3).

Referring to FIG. 10, the setting device 200f according to the seventh embodiment may be provided with a support bar 256 and a fixing bracket 252 integrally. In this case, the setting device 200f can be inserted and slid from the edge of the upper heat-insulating board 130 in order to mount the setting device 200f on the upper heat-

Although not shown, the heat insulating structure according to the embodiment of the present invention can be applied to various ships having a cargo hold capable of storing liquefied natural gas, an FPSO, an offshore structure, a land equipment, and the like.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

110: lower insulation board 120: primary secondary barrier
130: upper insulation board 140: secondary secondary barrier
150: connection board 200: setting device
210: Support bar 220: Fixing bracket

Claims (15)

A setting device installed on upper insulating boards of a liquefied natural gas holding window, comprising:
A support bar installed across the upper insulating boards and supporting an auxiliary secondary barrier or connection board attached between the upper insulating boards; And
And fixing brackets detachably attached to the upper heat insulating boards and to which both ends of the supporting bars are fixed;
The fixing bracket
A fixed end inserted and fixed in a fitting groove formed in an upper end of the upper heat insulating board;
An extension extending from the fixed end and protruding from the upper surface of the upper heat insulating board;
A support end extending from the extension end to support an upper surface of the support bar;
And a stopper member for preventing a positional change of the fixing bracket inserted into the upper heat insulating board.
delete delete The method according to claim 1,
The fixing bracket
Wherein the fixed end is provided on both sides of the extended end. The method according to claim 1,
The fixing bracket
Wherein the supporting end is provided on both sides of the extending end.
delete The method according to claim 1,
The stopper member
A fastening end protruding from one side of the extending end adjacent to an upper surface of the upper heat insulating board;
And a fastening member inserted in the fastening hole and fixed to the upper heat insulating board. A setting device installed on upper insulating boards of a liquefied natural gas holding window, comprising:
A support bar installed across the upper insulating boards and supporting an auxiliary secondary barrier or connection board attached between the upper insulating boards; And
And fixing brackets detachably attached to the upper heat insulating boards and to which both ends of the supporting bars are fixed;
The fixing bracket
A fixed end inserted and fixed in a fitting groove formed in an upper end of the upper heat insulating board;
An extension extending from the fixed end and protruding from the upper surface of the upper heat insulating board; And
And a support end extending from the extending end for supporting an upper surface of the support bar,
The extension
Wherein the length of the support is variable for adjusting the height of the support. A setting device installed on upper insulating boards of a liquefied natural gas holding window, comprising:
A support bar installed across the upper insulating boards and supporting an auxiliary secondary barrier or connection board attached between the upper insulating boards; And
And fixing brackets detachably attached to the upper heat insulating boards and to which both ends of the supporting bars are fixed;
The fixing bracket
A fixed end inserted and fixed in a fitting groove formed in an upper end of the upper heat insulating board;
An extension extending from the fixed end and protruding from the upper surface of the upper heat insulating board; And
And a support end extending from the extending end for supporting an upper surface of the support bar,
And a wedge inserted between the support bar and the connection board. 10. The method of claim 9,
Wherein the support bar is provided with a groove into which the wedge is fitted. The method according to claim 1,
Wherein the supporting bar is fixed to the supporting end of the fixing bracket by a fastening member. The method according to claim 1,
Wherein the support bar and the fixing bracket are integrally provided. delete delete delete

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