KR101349865B1 - 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 fixing device may include a central portion protruding upward and both sides extending downward from the central portion so as to be fit-fit to a coupling groove formed at a lower portion of an intersection where the first and second corrugations intersect. A first and second wire part including a pair and a pair of coupling parts interconnecting both ends of the first and second wire parts adjacent to each other, the first being perpendicular to the extending direction of the first and second wire parts; The first reinforcing member arranged in the direction is supported by one side of the pair of coupling portions below the central portion of the first and second wire portions.

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 tank is for storing or transporting Cryogenic Liquefied Natural Gas (Liquefied Natural Gas) at about ?? 162 ° C. Two barriers (primary barrier and secondary barrier) are used to seal liquefied natural gas. Equipped.

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 corrugation to have low 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, such a reinforcing member has a structure that is not fixed to the pleats of the primary barrier, there is a problem that it is not easy to install the reinforcement member under the pleats 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 one aspect of the invention, the fixing device of the reinforcing member for the primary barrier for supporting the primary barrier that forms the inner wall of the liquefied natural gas storage tank, the first barrier including the first and second corrugations intersecting with each other, the fixing The apparatus includes a central portion protruding upward and both sides extending downward from the central portion so that the first and second corrugations may be shaped to fit into a coupling groove formed at a lower portion of the intersection where the first and second corrugations intersect. A pair of coupling portions interconnecting the first and second wire portions and both adjacent ends of the first and second wire portions, and arranged in a first direction perpendicular to an extending direction of the first and second wire portions; The first reinforcement member is supported by the fixing device of the primary barrier reinforcement member, which is supported by one side of the pair of coupling portions below the central portion of the first and second wire portion. It is.

In this case, the coupling part may be formed of a wire extending from each of adjacent ends of the first and second wire parts and integrally formed with the first and second wire parts.

The first and second wire parts may be symmetrical with each other, and the center part may be arcuate.

On the other hand, the first and second wire portion may be wider in the direction toward both sides from the central portion side.

The coupling part may include a first protrusion protruding toward the center portion at the same height as both ends of the first and second wire parts.

At this time, the first reinforcing member may have insertion holes formed at both sides thereof, and the first protrusion of the coupling part may be inserted into the insertion hole of the first reinforcing member to support the first reinforcing member.

In this case, the coupling portion further includes a pair of second protrusions protruding in the extending direction of the first and second wire portions, respectively, at both ends of the first and second wire portions, and the first protrusion is the first protrusion. And a second reinforcing member positioned between the second protrusion of the second wire part and arranged in a second direction parallel to the extending direction of the first and second wire parts.

In this case, the first protrusion and the second protrusion may be formed of interconnected wires.

In this case, the second protrusion may be fitted inside the one end portion of the second reinforcing member to support the second reinforcing member.

Meanwhile, the first protrusion and the second protrusion may be formed on the same plane.

Meanwhile, the first and second wire parts may be made of aluminum or stainless steel.

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 pleats 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 the reinforcing member fixing device for the primary barrier according to an embodiment of the present invention.
7 is a perspective view in which a first reinforcing member is fixed to a reinforcing member fixing device for primary barrier according to an embodiment of the present invention.
8 is a perspective view in which a first reinforcing member and a second reinforcing member are fixed to a reinforcing member fixing device for primary barrier according to an embodiment of the present invention.
9 is a perspective view of the first reinforcing member and the second reinforcing member fixed to the primary barrier by a reinforcing member fixing device for primary barrier according to an embodiment of the present invention, viewed from the bottom.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. 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. 2 is a perspective view of the pleats and intersections of the primary barrier. 3 is a plan view of the pleats and intersections of the primary barrier. 4 is a perspective view of the wrinkles and intersections of the primary barrier viewed from below.

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 between the protrusion 18 and the first groove 21, and a triangular second side surface 24 is formed between the protrusion 18 and the second groove 23. .

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.

In the lower portion of the intersection portion 16, an inclined surface 31 having a substantially triangular shape and a first folded surface 32 and a second folded surface 34 positioned on both sides of the inclined surface 31 are second corrugated portions. It is formed symmetrically with respect to the extension direction centerline C of (14).

And the lower portion of the protrusion 18 is formed with a coupling groove 35 for coupling the reinforcing member fixing device to be described later.

In this case, the protrusions 18, the first and second grooves 21 and 23, and the recesses 25 and 27 formed at the intersections 16 of the primary barrier 10 may be drawn, molded or extruded. Using the corners of the respective parts may be formed to be bent.

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

1 to 5, the reinforcing member 200, which may be fixed to the pleats of the primary barrier using the fixing device according to an embodiment of the present invention, supports the support part 210 and the bottom part 220. Include.

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.

On the other hand, the reinforcing member 200 may be inserted into the insertion port 230 on both sides. As described later, the insertion opening 230 supports the first reinforcing member by inserting the first protrusion of the fixing device of the primary barrier reinforcing member into the insertion opening 230.

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 the reinforcing member fixing device for the primary barrier according to an embodiment of the present invention. 7 is a perspective view in which a first reinforcing member is fixed to a reinforcing member fixing device for primary barrier according to an embodiment of the present invention. 8 is a perspective view in which a first reinforcing member and a second reinforcing member are fixed to a reinforcing member fixing device for primary barrier according to an embodiment of the present invention.

6 to 8, the fixing device 100 of the reinforcing member for the primary barrier according to the exemplary embodiment of the present invention may include a first wire part 110, a second wire part 130, and a coupling part 150. ).

According to an embodiment of the present invention, the first and second wire parts 110 and 130 are made of a single wire and are formed to be inserted and fixed to the lower part of the intersection 16 of the primary barrier shown in FIG. 1. . In more detail, referring to FIG. 6, the first and second wire parts 110 and 13 are first and second wire parts to be shape-fitted to the coupling groove 35 formed at the lower side of the intersection 16. 110 and 130 are provided with a central portion 170 is symmetrical with each other protruded in the upward direction.

In addition, the first and second wire parts 110 and 130 have both side parts extending downward from the central part 170. In this case, the first and second wire parts 110 and 130 are closest to each other in the central part 170. The first and second wire parts 110 and 130 become wider in the downward direction from the center part 170 side.

As a result, the first and second wire parts 110 and 130 are formed along the coupling groove 35 and the coupling groove 35 of the primary barrier shown in FIG. 4. It can be inserted and fixed to the 34.

Meanwhile, the first and second wire parts 110 and 130 are symmetrical with each other, and the center part 170 is formed in an arc shape. Referring to FIG. 7, the central portion 170 of the first and second wire portions 110 and 130 may have a curved surface corresponding to an upper surface of the support portion 210 of the first reinforcing member 200 arranged in the first direction. Is formed.

As a result, the first reinforcing member 200 may penetrate the lower portion of the central portion 170 of the first and second wire portions 110 and 130.

In the following description of the fixing device of the primary barrier reinforcing member according to an embodiment of the present invention, the direction perpendicular to the extending direction of the first and second wire portion 110, 130 in FIG. The direction parallel to the extension direction of a 1st and 2nd wire part is prescribed | regulated as a 2nd direction, and is demonstrated.

On the other hand, the fixing device 100 of the primary barrier reinforcing member according to an embodiment of the present invention is a pair for interconnecting the two adjacent ends (155a, 155b) of the first and second wire portion (110, 130) It includes a coupling portion 150.

In this case, the pair of coupling parts 150 may include first protrusions 151 protruding from both ends 155a and 155b of the first and second wire parts 110 and 130 toward the central part 170. The first protrusion 151 supports both side surfaces of the first reinforcing member 200 penetrating the lower portion of the central portion of the first and second wire portions 110 and 130.

Referring to FIG. 7, insertion holes 230 into which the first protrusion 151 may be inserted are formed at both side surfaces of the first reinforcing member 200. In this case, the first protrusion 151 may be fitted into the insertion hole 230 to support the first reinforcing member 200.

According to one embodiment of the present invention, the first protrusion 151 has a square shape. However, the present invention is not limited thereto, and the shape of the first protrusion 151 may be various shapes that can be fitted into the insertion hole 230.

As shown in FIG. 6, the first protrusion 151 protrudes toward the center 170 at the same height as both ends 155a and 155b of the first and second wire parts 110 and 130.

Meanwhile, referring to FIG. 6, the pair of coupling parts 150 protrude in the second direction from both ends 155a and 155b of the first and second wire parts 110 and 130, respectively. And a protrusion 153. The pair of second protrusions 153 support both end portions of the second reinforcing members 300 arranged in the second direction.

At this time, each of the second protrusions 153 has a pair of protrusion shapes that are parallel to each other in the second direction. In addition, each of the second protrusions 153 extends from each adjacent both ends 155a and 155b of the first and second wire portions 110 and 130, and the first and second wire portions 110 and 130. It consists of a wire formed integrally with.

Referring to FIG. 8, each of the pair of second protrusions 153 is inserted into one end 312 of the second reinforcing member 300 to support the second reinforcing member 300.

In this case, each of the second protrusions 153 having a pair of protruding shapes may be fitted into the end 312 of the second reinforcing member 300 to support the second reinforcing member 300.

Meanwhile, referring to FIG. 6, the first protrusion 151 is positioned between the pair of second protrusions 153 located on both sides of the first and second wire parts 110 and 130. In this case, the first protrusion 151 and the second protrusion 153 are integrally formed of interconnected wires, and the first protrusion 151 and the second protrusion 153 are formed on the same plane.

On the other hand, the fixing device 100 of the primary barrier reinforcement member according to an embodiment of the present invention, the first protrusion 151 and the second reinforcing member 151, the coupling portion 150 supports the first reinforcement member 200 And a second protrusion 153 supporting 300. However, the present invention is not limited thereto, and the coupling part 150 may include only one of the first protrusion 151 and the second protrusion 151. Accordingly, the fixing device 100 of the primary barrier reinforcement member may support only one of the first reinforcement member 200 and the second reinforcement member 300.

In addition, according to an embodiment of the present invention, the first and second wire parts 110 and 130 may be made of aluminum or stainless steel.

Referring to FIG. 9, the fixing device 100 of the reinforcing member for the primary barrier according to the exemplary embodiment of the present invention is fitted to the coupling groove 35 formed in the lower portion of the intersection 16 of the primary barrier. Combined. At this time, the first protrusion 151 of the fixing device 100 supports and fixes both side surfaces of the first reinforcing member 200 so that the first reinforcing member 200 supports the inside of the first pleats 12. In addition, the second protrusion 153 of the fixing device 100 is inserted and fixed inside both ends of the second reinforcing member 300 so that the second reinforcing member 300 supports the inside of the second pleat 14.

Thus, the fixing device 100 of the primary barrier reinforcing member according to the embodiment of the present invention, by installing the reinforcing members (200, 300) on the primary barrier 10 without using an additional fixing means 1 Since the primary barrier 10 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).

As described above, the present invention has been described through limited embodiments and drawings, but the present invention is not limited thereto, and the present invention has been described below by the person skilled in the art to which the present invention pertains. Various modifications and variations are possible within the scope of the claims.

10: primary barrier 12: first wrinkle
14: second wrinkle portion 16: intersection portion
100: fixing device 110: first wire portion
130: second wire portion 150: coupling portion
151: first protrusion 153: second protrusion
200: first reinforcing member 300: second reinforcing member

Claims (11)

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 fixing device,
A first part having a center part protruding upward and both sides extending downward from the center part so as to be fit-fitted to a coupling groove formed at a lower part of an intersection where the first and second pleats intersect; Second wire section and
A pair of coupling portions interconnecting both adjacent ends of the first and second wire portions;
A first reinforcing member arranged in a first direction perpendicular to the extending direction of the first and second wire portion is supported by the one side of the pair of coupling portion below the central portion of the first and second wire portion. Fixing device for reinforcing members for primary barriers.
The method of claim 1,
And the coupling part is formed of a wire extending from adjacent ends of each of the first and second wire parts and integrally formed with the first and second wire parts.
The method of claim 1,
And the first and second wire parts are symmetrical with each other, and the center part is formed in an arcuate shape.
The method of claim 1,
The first and second wire portion fixing device for the primary barrier reinforcing member, characterized in that the width is wider toward the both sides from the central portion side.
The method according to any one of claims 1 to 4,
The coupling part is a fixing device of the primary barrier reinforcement member including a first projection protruding toward the center portion at the same height as both ends of the first and second wire portion.
The method of claim 5, wherein
The first reinforcing member has insertion holes formed at both sides thereof,
And the first protrusion of the coupling part is inserted into the insertion hole of the first reinforcing member to support the first reinforcing member.
The method according to claim 6,
The coupling portion
Further comprising a pair of second protrusions protruding in the extending direction of the first and second wire portions, respectively, at both ends of the first and second wire portions,
The first protrusion is located between the second protrusion of the first and second wire portions,
And a second reinforcing member arranged in a second direction parallel to the extending direction of the first and second wire portions is supported by the second protruding portion.
The method of claim 7, wherein
And the first protrusion and the second protrusion are formed of interconnected wires.
The method of claim 8,
And the second protrusion is fitted inside one end of the second reinforcing member to support the second reinforcing member.
The method of claim 8,
The first projection and the second projection is a fixing device of the primary barrier reinforcing member, characterized in that formed on the same plane.
The method of claim 1,
The first and second wire portion fixing device for the primary barrier reinforcement member, characterized in that made of aluminum or stainless steel.

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