KR101387750B1 - Device for fixing the primary barrier reinforcement member of lng storage tank - Google Patents

Abstract

A fixing device for reinforcing members for primary barriers is disclosed. A fixing device according to an embodiment of the present invention is a fixing device for a primary barrier reinforcing member which forms an inner wall of a liquefied natural gas storage tank and supports a primary barrier including first and second corrugations that cross each other. The primary barrier may include: a protrusion formed at an intersection where the first and second wrinkles intersect; A pair of inclined surfaces formed on both sides of the protrusion in the extending direction of the first corrugated portion, and first and second folded surfaces formed by the intersection of the first and second corrugated portions on both sides of the pair of inclined surfaces, respectively, The apparatus includes a pair of elastic coupling portions and first and first inserts fixed to triangular insertion grooves formed on both sides of the protrusion by first and second folding surfaces symmetrical with respect to the extending direction of the first corrugation portion. And an extension portion extending from the elastic coupling portion to support one side of the first and second reinforcing members respectively supporting the inner side of the corrugation portion.

Description

DEVICE FOR FIXING THE PRIMARY BARRIER REINFORCEMENT MEMBER OF LNG STORAGE TANK}

The present invention relates to a reinforcing member fixing device for the primary barrier of a liquefied natural gas storage tank.

Liquefied natural gas storage tanks are used to store or transport cryogenic liquefied natural gas (LNG) at about -162 ° C. It is equipped with two barriers (primary barrier and secondary barrier) to seal liquefied natural gas do.

The liquefied natural gas storage tank has a plywood structure in a heat insulating member made of polyurethane foam having a low thermal conductivity between a primary barrier and a secondary barrier, a secondary barrier and an inner hull, A heat insulating layer is formed by using a heat insulating board having a heat insulating member protecting plate having a high compressive strength.

At this time, since the primary barrier of the liquefied natural gas storage tank is in direct contact with the liquefied natural gas, high airtightness is required. The liquefied natural gas storage tank is welded to a plurality of barrier sheets made of stainless steel to form a primary barrier. When these primary barriers contact the cryogenic liquefied natural gas, heat shrinkage occurs. When the heat shrinkage occurs, It can be damaged by stress.

Because of this problem, the primary barriers have corrugations to have low in-plane stiffness. The crease reduces the thermal stress at the welded area by deforming a certain amount when heat shrinkage occurs.

On the other hand, when the liquefied natural gas storage tank storing the liquefied natural gas is transported by a transportation means such as a ship, the surface of the liquefied natural gas stored by the movement such as rolling, pitching, It may occur.

Such sloshing is referred to as sloshing, and this sloshing applies a large compressive force to the primary walls. If the compressive force by the sloshing exceeds the yield strength of the primary barriers, the safety of the primary barriers may deteriorate due to permanent deformation in the wrinkles most vulnerable to deformation.

Accordingly, the primary walls must have a low surface rigidity in correspondence with the heat shrinkage, and a high pressure resistance performance corresponding to the compressive force due to the occurrence of sloshing.

In order to improve the pressure resistance performance of the primary barrier, the applicant of the present invention has proposed a structure for installing a reinforcing member under the pleats of the primary barrier, as disclosed in the application No. 10-2008-0091085.

However, since the reinforcing member is not fixed to the corrugation of the primary barrier, it is not easy to install the reinforcing member under the corrugation of the primary barrier.

Patent Document 1: Korean Patent Application No. 10-2008-0091085

One embodiment of the present invention is to provide a fixing device for fixing the reinforcing member for the primary barrier to the pleats of the primary barrier of the liquefied natural gas storage tank.

According to an aspect of the present invention, there is provided a fixing device for a primary barrier reinforcing member that forms an inner wall of a liquefied natural gas storage tank and supports a primary barrier including first and second corrugations that cross each other. The primary barrier includes a protrusion formed at an intersection where the first and second wrinkled portions intersect, a pair of inclined surfaces formed on both sides of the protrusion in an extending direction of the first wrinkled portion, and both sides of the pair of inclined surfaces, respectively. And first and second folding surfaces formed by intersections of the first and second pleats, wherein the fixing device is symmetrical with each other about an extension direction of the first pleats; A pair of elastic coupling parts inserted into and fixed to a triangular insertion groove formed on both sides of the protruding portion by a surface, and first and second reinforcing members respectively supporting the inner side of the first and second pleats; An extension portion extending from the elastic coupling portion to support one side of the pair, each of the pair of elastic coupling portion is inclined in an upward direction, consisting of a pair of wings symmetrical to each other around the extension direction of the first pleats A fixing device for the reinforcing member for the primary barrier is provided.

At this time, each of the pair of elastic coupling portion may be formed of a pair of wings that are inclined in the upper direction and symmetrical with each other around the extending direction of the first pleats.

In this case, a reinforcement groove may be formed between the pair of wing parts and the extension part so that the pair of wing parts are firmly fixed to the insertion groove.

At this time, the reinforcing groove may be formed in parallel with the extending direction of the second pleats.

In this case, the extension part may be inserted into one end of the first and second reinforcement members to support the first and second reinforcement members.

At this time. The extension part may be formed in a plate shape corresponding to the inner shape of the first and second reinforcing members.

On the other hand, the extension may be arranged in a cross shape around the elastic coupling portion.

When the fixing device for the primary barrier reinforcing member according to an embodiment of the present invention is used, the reinforcing member may be simply fixed to the wrinkle part of the primary barrier.

1 is a perspective view of a primary barrier of a liquefied natural gas storage tank.
2 is a perspective view of the pleats and intersections of the primary barrier of the liquefied natural gas storage tank.
3 is a plan view of the pleats and intersections of the primary barrier of the liquefied natural gas storage tank.
4 is a perspective view from below of the pleats and intersections of the primary barrier of the liquefied natural gas storage tank;
5 is a perspective view of an example of a reinforcing member installed on the primary barrier.
Figure 6 is a perspective view of a fixing device of the reinforcing member for the primary barrier according to an embodiment of the present invention.
7 is a perspective view of the fixing device for the primary barrier reinforcing member according to an embodiment of the present invention, viewed from below.
8 is a partial perspective view of the fixing device of the primary barrier reinforcing member according to an embodiment of the present invention fixed below the intersection of the primary barrier.
9 is a partial plan view of the fixing device of the primary barrier reinforcing member according to an embodiment of the present invention fixed below the intersection of the primary barrier.
10 is a partially enlarged view in which the fixing device of the primary barrier reinforcing member according to the exemplary embodiment of the present invention is fixed to the insertion groove below the cross section.
11 is a perspective view in which the first and second reinforcement members are fixed by the fixing device of the reinforcement member for the primary barrier according to the exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

Prior to describing the fixing device for the primary barrier reinforcing member of the liquefied natural gas storage tank according to an embodiment of the present invention in the structure of the primary barrier to which the fixing device of the reinforcing member according to an embodiment of the present invention is installed Let's explain first.

1 is a perspective view of a primary barrier of a liquefied natural gas storage tank. 2 is a perspective view of the pleats and intersections of the primary barrier of the liquefied natural gas storage tank. 3 is a plan view of the pleats and intersections of the primary barrier of the liquefied natural gas storage tank. 4 is a perspective view from below of the pleats and intersections of the primary barrier of the liquefied natural gas storage tank;

Referring to FIG. 1, the primary barrier 10 of liquefied natural gas extends in the x-axis direction and protrudes in the z-axis direction in the x-axis direction and extends in the y-axis direction in the z-axis. And a second pleat 14 protruding in the direction.

The first wrinkle portion 12 and the second wrinkle portion 14 are formed in a lattice shape as a whole with a plurality of wrinkle portions being spaced apart from each other in the x-axis direction and the y-axis direction.

The intersecting portion 16 is formed at a position where the first wrinkle portion 12 and the second wrinkle portion 14 intersect.

2 to 4, the intersection portion 16 is formed with a protrusion 18 protruding in the z-axis direction at a position where the first wrinkles 12 and the second wrinkles 14 intersect. The first groove 21 and the second groove 23 formed in parallel with the extension direction of the second wrinkled portion 14 are formed at both sides of the protrusion 18 in the extending direction of the first wrinkled portion 12.

A triangular first side surface 22 is formed on the outer side surface of the primary barrier between the protrusion 18 and the first groove 21, and a triangular second between the protrusion 18 and the second groove 23. Sides 24 are formed on the outer side of the primary barrier.

Recesses 25 and 27 are formed on both side portions of the projecting portion 18 in the extending direction of the second wrinkle portion 14. [

Meanwhile, referring to FIGS. 1 to 4, since the primary barrier 10 is formed of a plate, the first and second wrinkles 12 and 14 of the primary barrier are formed in a curved surface. The lower part of the first wrinkle part 12, the lower part of the second wrinkle part 14, and the lower part of the intersection part 16 are formed as empty spaces. At this time, the lower side surface 36 of the first wrinkle portion 12 and the lower side surface 38 of the second wrinkle portion 14 are curved.

Referring to FIG. 4, a pair of inclined surfaces 31 and 33 having a substantially triangular shape is formed at both lower sides of the protrusion 18 at the lower side of the intersection 16, and the inclined surfaces 31 and 33 are second to each other. It is formed symmetrically with respect to the center line C in the extending direction of the wrinkles 14.

At this time, first and second folded surfaces 32 and 34 are formed on both sides of the respective inclined faces 31 and 33 by the intersection of the first and second folded portions 12 and 14. The first and second folded surfaces 32 and 34 are symmetrical to each other about the extending direction of the first folded portion.

As shown in FIG. 4, substantially triangular insertion grooves 37 and 39 are formed at both lower sides of the protruding portion 18 by the first and second folding surfaces 32 and 34 which are symmetrical with each other. At this time, a fixing device of a reinforcing member, which will be described later, can be coupled to the insertion grooves 37, 39.

At this time, the protrusions 18, the first and second grooves 21 and 23, the recesses 25 and 27, and the first and second folded surfaces formed at the intersections 16 of the primary barrier 10. 32 and 34 may be formed to bend the corners of each part using a drawing, a mold or an extrusion manufacturing method.

5 is a perspective view of an example of a reinforcing member installed on the primary barrier.

Referring to FIG. 5, the reinforcing member 200, which may be fixed to the pleats of the primary barrier using a fixing device according to an embodiment of the present invention, includes a support 210 and a bottom 220.

The supporting portion 210 of the reinforcing member 200 is formed as a plate member bent in a shape corresponding to the lower side of the first and second wrinkles 12 and 14 and extending in one direction.

A bottom 220 is positioned below the support 210. The bottom portion 220 is formed in the shape of a rectangular plate extending in one direction.

At this time, the reinforcing member 200 may have a tube shape including the support portion 210 and the bottom portion 220. Both ends of the supporting part 210 and the bottom part 220 in the extending direction may be opened in both lateral directions.

The fixing device according to an embodiment of the present invention is a device for fixing the reinforcing member 200 having the above-described structure to the lower side portion of the corrugation of the primary barrier 10. Hereinafter, the configuration of the reinforcing member fixing device for primary barriers according to one embodiment of the present invention will be described in detail with reference to the drawings.

Figure 6 is a perspective view of a fixing device of the reinforcing member for the primary barrier according to an embodiment of the present invention. 7 is a perspective view of the fixing device for the primary barrier reinforcing member according to an embodiment of the present invention, viewed from below. 8 is a partial perspective view of the fixing device of the primary barrier reinforcing member according to an embodiment of the present invention fixed below the intersection of the primary barrier. 9 is a partial plan view of the fixing device of the primary barrier reinforcing member according to an embodiment of the present invention fixed below the intersection of the primary barrier. 10 is a partially enlarged view in which the fixing device of the primary barrier reinforcing member according to the exemplary embodiment of the present invention is fixed to the insertion groove below the cross section.

6 to 10, the fixing device 100 of the reinforcing member for the primary barrier according to the exemplary embodiment of the present invention includes a pair of elastic coupling parts 110 and extensions 130.

6 and 7, the pair of elastic coupling parts 110 are arranged side by side in the first direction. In this case, the elastic coupling parts 110 may be disposed to be symmetrical with each other about a first direction and a second direction perpendicular to the first direction.

Hereinafter, in describing the fixing device of the primary barrier reinforcing member according to an embodiment of the present invention, in FIG. 6, the first direction is the same as the extending direction of the first corrugation portion of the primary barrier, and the second direction is the first direction. It demonstrates by defining in the same direction as the extension direction of the 2nd wrinkle part perpendicular | vertical to a wrinkle part.

On the other hand, each elastic coupling portion may be composed of a pair of wings (111, 113) as shown in FIG. In this case, each of the wing parts 111 and 113 may be inclined in an upward direction and may have a pair of wing shapes that are symmetrical with respect to the first direction.

In this case, the wing parts 111 and 113 may be made of a material having elasticity. Thereby, as described later, each of the wing portions 111 and 113 is elastically inserted and fixed to the insertion grooves 37 and 39, respectively.

However, the elastic coupling part 110 inserted into and fixed to the insertion grooves 37 and 39 is not limited to a wing shape, but may be formed in various shapes that may be fixed to the insertion grooves 37 and 39 forming a triangular shape.

8 to 10, each of the pair of wings 111 and 113 is inserted into and fixed to insertion grooves 37 and 39 formed below the primary barrier intersection, respectively. Referring to FIG. 10, the wing portion 113 has a pair of wing shapes and is inserted into and fixed to an insertion groove 39 formed in a substantially triangular shape. More specifically, a pair of wings of the wing portion 113 simultaneously supports both sides of the insertion groove 39 forming a triangular shape.

In this case, like the wing 113, the wing 111 may be inserted into and fixed to the insertion groove 37. According to the exemplary embodiment of the present invention, the pair of wings 111 and 113 of the elastic coupling part 110 are elastically inserted and fixed in the insertion grooves 37 and 39, respectively, thereby fixing the device 100. Can be firmly fixed below the intersection 16.

On the other hand, in the fixing device 100 according to an embodiment of the present invention, reinforcement grooves 151 and 153 may be formed between the wing parts 111 and 113 and the extension parts 131 and 133, respectively. At this time, the reinforcing grooves 151 and 153 are firmly fixed to the insertion grooves 37 and 39 when the wing portions 111 and 113 are inserted into the insertion grooves 37 and 39. To be.

6 and 7, the reinforcement grooves 151 and 153 are formed between the wing parts 111 and 113 and the extension parts 131 and 133 in the first direction. The reinforcement grooves 151 and 153 may have a concave shape extending in the second direction.

At this time, since the reinforcement grooves 151 are formed in the second direction adjacent to the wing 111, the pair of wing portions 111 may not be easily bent in the second direction, and thus the pair of wing portions 111 may be formed. Can be firmly fixed to the insertion groove 37. On the other hand, the extension 130 of the fixing device 100 according to an embodiment of the present invention is the inside of the first and second wrinkles (12, 14) One end of each of the first and second reinforcing members 211, 213, 215, and 217 may be supported.

In this case, the extension part 130 extends from the elastic coupling part 110 in the first and second directions.

Referring to FIG. 6, each of the extension parts 131 and 133 extends from the pair of wings 111 and 113 in the first direction. In addition, the extension parts 135 and 137 extend in the second direction, and the extension parts 131, 132, 135 and 137 are arranged in a cross shape around the elastic coupling part 110.

Meanwhile, the extensions 131, 132, 135, and 137 may be inserted into the ends of the reinforcing members having both ends open to support the first and second reinforcing members. In this case, the extension part may have a plate shape corresponding to the internal shape of the first and second reinforcing members 211, 213, 215, and 217.

Accordingly, as shown in FIG. 11, the extension parts 131, 132, 135, and 137 of the fixing device 100 fixed to the lower side of the primary barrier have first and second reinforcing members 211, 213, and 215. , 217 is inserted into one end of the end so that the first and second reinforcing members are fixed inside the crease.

In this case, the extension parts 131, 132, 135, and 137 may be metal plates. For example, the metal plate may be a plate made of aluminum or stainless steel.

On the other hand, in the fixing device 100 according to an embodiment of the present invention, the elastic coupling portion 110 and the extension portion 130 may be made of one metal plate.

As described above, the fixing device 100 for the primary barrier reinforcing member according to the embodiment of the present invention fixes the primary barrier 10 by fixing the reinforcing member to the primary barrier 10 without using an additional fixing means. ) Can be fixed on the insulation board, there is an advantage that can simplify the time and process for installing the primary barrier (10).

In addition, the fixing device 100 of the reinforcing member for the primary barrier of the liquefied natural gas storage tank according to an embodiment of the present invention, liquefied natural gas installed in a self-propelled LNG carrier ship or LNG Regasification Vessel (RV) vessel In addition to gas storage tanks, it can be applied to LNG natural gas storage tanks installed in floating offshore structures such as LNG Floating, Production, Storage and Offloading (FPSO) or LNG Floating Storage Regasification Unit (FSRU).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Various modifications and variations are possible within the scope of the appended claims.

10: primary barrier 12: first wrinkle
14: second wrinkle portion 16: intersection portion
18: protruding portion 31, 33: inclined surface
32: first folded surface 34: second folded surface
37, 39: insertion groove 100: locking device
110: elastic coupling portion 111, 113: wing portion
130: extension

Claims (7)

An apparatus for fixing a primary barrier reinforcing member, which forms an inner wall of a liquefied natural gas storage tank and supports a primary barrier including first and second corrugations that intersect each other.
The primary barrier is,
A protrusion formed at an intersection of the first and second wrinkles;
A pair of inclined surfaces formed on both sides of the protruding portion in an extending direction of the first wrinkled portion;
First and second folded surfaces formed by intersections of the first and second corrugations on both sides of each of the pair of inclined surfaces,
The fixing device,
A pair of elastic coupling portions inserted into and fixed to triangular-shaped insertion grooves formed on both sides of the protruding portion by the first and second folding surfaces symmetrical with respect to the extending direction of the first pleat portion;
It includes an extension extending from the elastic coupling portion to support one side of the first and second reinforcing members for supporting the inner side of the first and second pleats, respectively
Each of the pair of elastic coupling portion is inclined in an upward direction, but consisting of a pair of wings that are symmetrical with each other about the extending direction of the first pleated portion, fixing device for the primary barrier reinforcement. delete The method according to claim 1,
And a reinforcing groove is formed between the pair of wing portions and the extension portion so that the pair of wing portions are firmly fixed to the insertion groove. The method of claim 3, wherein
The reinforcement groove is a fixing device of the primary barrier reinforcement member is formed in parallel with the extending direction of the second pleats. 5. The method of claim 4,
And the extension part is inserted into one end of the first and second reinforcement members to support the first and second reinforcement members. 6. The method of claim 5,
The extension part is a fixing device of the primary barrier reinforcing member made of a plate shape corresponding to the inner shape of the first and second reinforcing members. The method according to any one of claims 1 and 3 to 6,
The extension part is a fixing device of the reinforcing member for the primary barrier is arranged in a cross shape around the elastic coupling portion.

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