KR20120136320A - Connection structure between base support structure and insulation barrier of storage tank - Google Patents

Abstract

PURPOSE: A connection structure between a base support structure and a storage tank insulation barrier is provided to improve work efficiency by effectively connecting a base support structure and a storage tank insulation barrier with using a connection plate. CONSTITUTION: A connection structure between a base support structure and a storage tank insulation barrier comprises a first plate, a second plate, a bottom support, a middle support, a top support, and a connection plate(110). The bottom support is interposed between the inner bottom face of a liquefied natural gas storage tank and the first plate. The top support is arranged on the top of the second plate to support the bottom of the pump tower. The connection plate comprises a connection part. The connection part is installed to surround the periphery of the second plate, connects the second plate and a primary barrier, is protruded at a constant pattern.

Description

CONNECTION STRUCTURE BETWEEN BASE SUPPORT STRUCTURE AND INSULATION BARRIER OF STORAGE TANK}

The present invention relates to a connecting structure between the base support structure and the storage tank insulating barrier.

Liquefied natural gas (LNG) storage tanks of carriers store liquefied natural gas cooled to approximately -163 ° C, and are made of materials that can withstand cryogenic temperatures, and are resistant to thermal stress and heat shrinkage, and insulate structures that can block heat intrusion. Is made of. The storage tank has a primary barrier, an upper insulation board, a secondary barrier, and a lower insulation board in an outward direction from the inside of the tank, and is provided in a state coupled with an inner hull.

The storage tank includes a pump tower for loading and unloading liquefied natural gas. Pump tower is connected to the loading device to fill the liquefied natural gas into the storage tank (filling pipe), connected to the unloading device to discharge the liquefied natural gas in the storage tank (discharge pipe), etc. Includes various accessories The pipe of the pump tower is provided in the form of a truss (pipe structure) structure.

The pump tower is typically installed close to the bulkhead on the stern side and is supported by a base support structure provided on the bottom of the storage tank in a fixed dome. The installation process of the pump tower consists of installing the base support before the pump tower is mounted, performing a heat insulation barrier, and then combining the base support and the lower part of the pump tower.

On the other hand, Korean Utility Model Publication No. 20-2010-0001512 discloses a description of the support structure of the support of the LAN pump tower. At this time, the support corresponding to the base support structure is made of a cylindrical molding, and is provided in a cone shape gradually decreasing in diameter from an inner bottom wall to an upper portion of the primary barrier.

However, the process of manufacturing or installing this type of support into an integral molding has a very technically difficult aspect. There is also a need for an efficient connection between the support and the storage tank thermal barrier.

Patent Document: Korean Utility Model Model No. 20-2010-0001512 (published Feb. 10, 2010)

An embodiment of the present invention provides a base support in the form of a combination (bonded) with the first plate and the second plate interposed therebetween the bottom support, the intermediate support and the top support for pump tower support, The present invention aims to provide a connection structure between the base support structure and the storage tank thermal barrier that improves the ease of production and work efficiency.

In addition, by using a connection plate including a connection pattern of a predetermined pattern protruding into a curved shape to provide a connection structure between the base support structure and the storage tank insulation barrier to effectively connect the base support structure and the thermal insulation barrier of the storage tank to improve the work efficiency. I would like to.

In addition, to provide a connection structure between the base support structure and the storage tank insulation barrier to reduce the thermal stress caused by the heat shrink generated in the connection plate portion through the connection portion of the connection plate.

According to an aspect of the invention, the first plate, the second plate, the bottom support portion interposed between the inner bottom surface of the liquefied natural gas storage tank and the first plate, interposed between the first plate and the second plate A connection structure between a base support structure and a storage tank thermal barrier including an intermediate support portion and a top support portion disposed on an upper portion of the second plate to support a lower portion of a pump tower, wherein the connection structure is provided to surround a periphery of the second plate. A connection structure may be provided between the base support structure and the storage tank insulating barrier connecting the second plate and the primary barrier and providing a connection plate including a connection portion protruding in a predetermined pattern.

The first plate and the second plate may be provided with a connection structure between the base support structure and the storage tank thermal insulation barrier disposed on the same plane as the secondary barrier and the primary barrier of the storage tank, respectively.

The connection part may include a first connection part in a longitudinal direction and a second connection part in a lateral direction, and the first connection part and the second connection part may be formed in a pattern surrounding the periphery of the second plate to be spaced apart from each other by a predetermined distance. .

At least one peripheral portion of the connecting plate is provided, one end is connected to the edge of the connecting plate, the other end may further include a connector connected to the end of the crimp of the primary barrier.

The other end of the connector may have a shape corresponding to the pleats of the primary barrier.

The connection part may further include a third connection part provided in a curved shape at each corner portion of the connection plate, and the third connection part may be directly connected to the pleats of the primary barrier.

The connection part may be provided to have a discontinuous shape at a point where they cross each other, and may be directly connected to the pleats of the primary barrier.

The bottom support portion may have a tapered inclined surface that gradually decreases in diameter from the inner bottom surface.

The bottom support portion may be provided with a cone-shaped pipe having an upper diameter equal to the diameter of the intermediate support portion, and the intermediate support portion and the top support portion may be provided with a circular pipe having the same diameter.

The peripheral portion of the first plate protruding outward from the junction of the bottom support and the intermediate support is disposed on the same plane as the secondary barrier and protrudes outward from the junction of the intermediate support and the top support. The peripheral portion of the second plate may be disposed on the same plane as the primary barrier.

The bottom support part, the intermediate support part and the top support part may be laminated in a layered manner.

The bottom support portion, the intermediate support portion and the top support portion are each provided by a perforated pipe having a constant diameter, the diameter of the bottom support portion is larger than the diameter of the intermediate support portion, the diameter of the intermediate support portion is larger than the diameter of the top support portion Can be large.

Wherein the first plate has the same outer diameter as the bottom support and closes the top of the bottom support and the bottom of the intermediate support and the second plate has the same outer diameter as the intermediate support, It is possible to seal the lower portion of the base.

The connection structure between the base support structure and the storage tank insulating barrier according to an embodiment of the present invention is coupled to the first plate and the second plate interposed therebetween for supporting the pump tower. By providing the base support in the form of), the usability and work efficiency of the base support can be improved.

In addition, by using a connection plate including a connection portion of a predetermined pattern protruding into a curved shape it is possible to effectively connect the insulating barrier of the base support structure and the storage tank to improve the work efficiency.

In addition, it is possible to reduce the thermal stress due to heat shrink generated in the connection plate portion through the connection portion of the connection plate.

1 is a simplified cross-sectional view of a liquefied natural gas storage tank is installed base support structure according to an embodiment of the present invention.
2 is a cross-sectional perspective view showing the structure of the base support structure and the heat insulation barrier of FIG.
3 is a cross-sectional view of the base support structure of FIG.
Figure 4 is a perspective view showing the structure of the base support structure and the insulating barrier according to another embodiment of the present invention.
5 is a cross-sectional view of the base support structure of FIG.
6 is a plan view illustrating a connection structure connecting the second plate and the primary barrier by the connection plate in the base support structure of FIGS. 2 and 4.
7 is a perspective view of the connector used in the connection structure of FIG.
8 to 10 show another example of a pattern for forming a connection part provided in the connection plate of FIG. 6.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like numbers refer to like elements throughout.

1 to 3, the LNG storage tank (hereinafter referred to as "tank") (1) is a primary barrier (6), the upper insulation board (7), from the inside of the tank 1 to the outside direction, The heat insulation barrier layer 5 which consists of the secondary barrier 8 and the lower insulation board 9 is provided. In addition, the pump tower 2 of the tank 1 is supported by the base support structure 100 provided at the bottom of the tank 1. Here, the pump tower 2 is briefly shown in the figure.

Base support structure 100 according to an embodiment of the present invention (hereinafter referred to as "base support") is the first plate 20, the second plate 30, the bottom support portion 40, the intermediate support portion 50 and Top support 60 is included.

The first plate 20 is interposed between the bottom support part 40 and the intermediate support part 50 to seal the upper part of the bottom support part 40 and the lower part of the intermediate support part 50. The first plate 20 is made larger than the diameter (inner diameter or outer diameter) of the bottom support portion 40 and the intermediate support portion 50. Here, the peripheral portion 21 of the first plate 20 protruding outward from the joint portion W1 of the bottom support portion 40 and the intermediate support portion 50 is the same as the secondary barrier 8 provided in the tank 1. Placed on a plane.

The second plate 30 is interposed between the intermediate support part 50 and the top support part 60, and seals the upper part of the intermediate support part 50 and the lower part of the top support part 60. The second plate 30 is made larger than the diameters of the intermediate support part 50 and the top support part 60. In addition, the peripheral portion 31 of the second plate 30 protruding outward from the junction portion W2 of the intermediate support portion 50 and the top support portion 60 is the same as the primary barrier 6 provided in the tank 1. Placed on a plane. The first plate 20 and the second plate 30 described above may be provided as a flat circular plate in this embodiment, but is not limited thereto.

The bottom support portion 40 is interposed between the inner bottom wall 3 of the tank 1 and the first plate 20, and the tapered inclined surface gradually decreases in diameter upward from the inner bottom wall 3. It is provided with a through cone-shaped pipe having 41.

In addition, the bottom support portion 40 is disposed on the same plane as the lower insulation board 9 interposed between the inner bottom surface 3 and the secondary barrier 8. In this case, a heat insulation layer 12 provided in the form of a plurality of heat insulation blocks may be interposed between the bottom support portion 40 and the lower insulation board 9. The heat insulation layer 12 may be implemented by, for example, plywood, wooden box, or the like. The lower insulation board 9 includes a lower protection plate 9a and a lower insulation member 9b. The lower protective plate 9a may be made of, for example, a material such as plywood. The lower insulation member 9b is made of, for example, polyurethane foam (PUF, Polyurethane Form) to protect the hull from the cryogenic fluid. The lower insulating member 9b may be bonded to the lower protective plate 9a by an adhesive (for example, glue) or the like.

The intermediate support part 50 is disposed based on the center line X of the bottom support part 40 between the first plate 20 and the second plate 30 and may be provided as, for example, a penetrated cylindrical pipe having a constant diameter. Can be. Here, the diameter of the intermediate support 50 and the diameter of the top of the bottom support 40 is provided to the same size. The intermediate support part 50 is disposed on the same plane as the upper insulation board 7 interposed between the primary barrier 6 and the secondary barrier 8. In this case, the filling member 14 may be inserted and filled between the intermediate support part 50 and the upper insulation board 7. The filling member 14 may include glass wool or the like for maintaining thermal insulation performance.

The upper insulation board 7 includes an upper protection plate 7a and an upper insulation member 7b. The upper protection plate 7a may be made of the same material as the lower protection plate 9a, and the upper insulation member 7b may be made of the same material as the lower insulation member 9b.

In addition, the primary barrier 6 is formed in direct contact with the liquefied natural gas, and has a high airtightness, and when thermal contact with the cryogenic liquefied natural gas occurs, heat shrinkage occurs, and when the heat shrinkage occurs, the welded portion is damaged due to thermal stress. It can be formed to maintain a low in-plane stiffness to prevent it. The primary barrier 6 is formed to have a wrinkle portion 6a, the wrinkle portion 6a is reduced by a certain amount when heat shrinkage occurs to reduce the thermal stress at the welded portion. The primary barrier 6 may be made of a metal material such as stainless steel.

In addition, the secondary barrier 8 may be composed of a plurality of sheets made of a metal material such as stainless steel, aluminum, brass, zinc, or the like. As another example, the secondary barrier 8 may be composed of a composite sheet composed of a metal sheet and a fiber reinforced composite material.

The top support part 60 is disposed on the second plate 30 based on the center line X of the intermediate support part 50, and is provided as a penetrated pipe having the same diameter and shape as the intermediate support part 50.

In addition, the top support 60 may support the lower portion of the pump tower 2, and may include one or more auxiliary supports 62 inside. The auxiliary support part 62 may be provided in a penetrating shape corresponding to the inner circumferential surface shape of the top support part 60, and may be welded to the inner circumferential surface of the top support part 60.

In addition, the lower peripheral portion of the top support 60 is provided with a support member 64 including brackets, ribs, etc. for connecting the top support 60 and the second plate 30 to the base support (62) together with the auxiliary support (62). 100) durability and rigidity can be increased. As another example, the support member 64 may be provided at the lower periphery of the intermediate support 50 to connect the intermediate support 50 and the first plate 20.

The above-described bottom support part 40, the intermediate support part 50, and the top support part 60, and the first plate 20 and the second plate 30 may be joined to each other by welding.

4 and 5, the above-described bottom support part 40, the intermediate support part 50, and the top support part 60 may be stacked in a stepped manner in another embodiment of the present invention. In this case, the bottom support part 40, the intermediate support part 50, and the top support part 60 may be provided with a through-pipe having the same shape having a constant diameter (inner diameter or outer diameter). Hereinafter will be described by taking an example of being provided with a cylindrical through-pipe.

The bottom support portion 40 is disposed on the same plane as the lower insulation board 9 interposed between the inner bottom surface 3 and the secondary barrier 8. An insulating layer 12 provided in the form of a plurality of insulating blocks may be interposed between the bottom support part 40 and the lower insulating board 9.

At this time, the first plate 20 may be provided as a circular plate having the same outer diameter as the bottom support portion 40, the first plate 20 is the upper portion of the bottom support portion 40 and the lower portion of the intermediate support portion 50 Seal it. This first plate 20 is disposed on the same plane as the secondary barrier 8 provided in the tank (1).

The intermediate support part 50 is disposed above the first plate 20 based on the center line X of the bottom support part 40. In this case, the intermediate support part 50 has the same shape as the bottom support part 40 but is provided as a penetrated pipe having a diameter smaller than the diameter of the bottom support part 40. The intermediate support part 50 is disposed on the same plane as the upper insulation board 7 interposed between the primary barrier 6 and the secondary barrier 8, and between the intermediate support part 50 and the upper insulation board 7. Filling member 14 may be inserted and filled in.

At this time, the second plate 30 may be provided as a circular plate having the same outer diameter as the intermediate support portion 50, and seals the upper portion of the intermediate support portion 50 and the lower portion of the top support portion 60. The first plate 20 is disposed on the same plane as the primary barrier 6 provided in the tank 1.

The top support part 60 is disposed above the second plate 30 based on the center line X of the intermediate support part 50, and has the same shape as the intermediate support part 50 but smaller than the diameter of the intermediate support part 50. It is provided with a perforated pipe having a. An auxiliary support 62 may be provided inside the top support 60, as described above with reference to FIG. 2, and a support member 64 may be installed at the lower periphery.

The above-described bottom support part 40, the intermediate support part 50, and the top support part 60 are disposed with respect to the center line X, and are to be joined to the first plate 20 and the second plate 30 by welding, respectively. Can be.

In addition, the first plate 20, the bottom support part 40, the second plate 30, and the intermediate support part 50 may be provided in one piece. Through this, the welding amount can be reduced and the work efficiency can be improved.

Meanwhile, referring to FIGS. 2, 4 and 6, the above-described second plate 30 may be connected to the primary barrier 6 by the connection plate 110 according to the embodiment of the present invention. Here, the primary barrier 6 has a wrinkled portion 6a protruding from the sheet layer 6b and the sheet layer 6b in a convex curved shape of a predetermined pattern. The pleats 6a may be provided, for example, in a shape that intersects in the longitudinal and transverse directions, and the pleats 6a-1 and 6a-2 in the longitudinal and lateral directions may be provided to have discontinuous shapes at each other at the intersection points. Can be. The primary barrier 6 may be made of a metal material such as stainless steel.

The connecting plate 110 may be provided as a flat plate surrounding the periphery of the second plate 30, and the second plate 30 is connected to the primary barrier 6 to form the second plate 30 and 1. The space between the barrier walls 6 is covered. The connection plate 110 may be made of the same material as the primary barrier 6 and may be disposed on the same plane as the primary barrier 6. In addition, the connection plate 110 may be provided in the form of a plurality of blocks are welded or integrated as one unit.

The connection plate 110 includes a flat portion 111 and a connecting portion 113 having a predetermined pattern protruding in a curved shape from the flat portion 111 like the folded portion 6a of the primary wall 6 described above can do. The connecting portion 113 includes a first connecting portion 113a in the longitudinal direction and a second connecting portion 113b in the lateral direction. For example, the first connecting portion 113a and the second connecting portion 113b are spaced apart from each other by a predetermined distance. It may be formed in a pattern surrounding the periphery of the two plates (30).

Referring to FIG. 7, the pleats 6a of the primary barrier 6 are connected to the edge of the connection plate 110 by the connector 112. In this case, at least one connector 112 is provided at the periphery of the connection plate 110, one end 112a is connected to the edge of the connection plate 110, and the other end 112b is a crimp portion of the primary barrier 6. (6a) connected to the end. One end 112a of the connector 112 may be welded in an overlapping manner with the edge of the connection plate 110, or may be welded and disposed on the same plane as the connection plate 110. The other end 112b of the connector 112 may have a curved shape corresponding to the shape of the wrinkle part 6a of the primary barrier 6, and may be connected to the wrinkle part 6a of the primary barrier 6.

On the other hand, as shown in Figure 8, the first connecting portion 113a of the above-described connecting plate 110 is provided to have a discontinuous shape at the point of intersection with the second connecting portion 113b, the primary barrier (6) It may be connected in a form that is directly continuous with the wrinkle portion (6a). The second connector 113b may be directly connected to the pleats 6a of the barrier wall 6 in a continuous shape. In addition, a fourth connection portion 113d directly connected to the pleats 6a of the primary barrier 6 may be formed at the central portions of the first connection portion 113a and the second connection portion 113b on the connection plate 110. Can be. In the present embodiment, the connector 112 may be omitted.

As shown in FIG. 9, the first connecting portion 113a and the second connecting portion 113b of the connecting plate 110 surround the periphery of the second plate 30 to be spaced apart from each other by a predetermined distance as in FIG. 6. It can be formed in a pattern. In this case, both ends of the third connection portion 113C provided in a curved shape at each corner portion of the connection plate 110 may be directly connected to the pleats 6a of the primary barrier 6.

In addition, as shown in FIG. 10, in the form of FIG. 9 described above, the primary barrier 6 is formed at the center of the first connecting portion 113a and the second connecting portion 113b surrounding the periphery of the two plates 30. A fourth connection portion 113d may be formed to be directly connected to the wrinkle portion 6a. In the present embodiment, the connector 112 may be omitted.

As described above, each of the connection parts 113a to 113d of FIGS. 6 and 8 to 10 effectively deforms the thermal stress by a certain amount when heat shrinkage occurs.

The foregoing has shown and described specific embodiments. However, it is to be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the scope of the technical idea of the present invention described in the following claims It will be possible.

1: storage tank 20: first plate
30: second plate 40: floor support
50: intermediate support 60: top support
100: base support structure 110: connecting plate
112: connector 113a-113d: connection part

Claims (13)

A first plate, a second plate, a bottom support part interposed between the inner bottom surface of the LNG storage tank and the first plate, an intermediate support part interposed between the first plate and the second plate, and the second plate In the connection structure between the base support structure and the storage tank insulation barrier disposed on the top and including a top support for supporting the bottom of the pump tower,
A connection structure between the base support structure and the storage tank insulating barrier provided in a form surrounding the periphery of the second plate and connecting the second plate and the primary barrier, the connection plate including a connection portion protruding in a predetermined pattern. The method of claim 1,
The first plate and the second plate are connected to each other between the base support structure and the storage tank insulating barrier disposed on the same plane as the secondary barrier and the primary barrier of the storage tank, respectively. The method of claim 1,
The connecting part includes a first connecting part in a longitudinal direction and a second connecting part in a lateral direction, wherein the first connecting part and the second connecting part are formed in a pattern surrounding the periphery of the second plate to be spaced apart from each other by a predetermined distance. And connection structure between the storage tank insulation barrier. The method of claim 3,
The connection structure between the base support structure and the storage tank insulation barrier further comprises a connector provided at one or more periphery of the connection plate, one end is connected to the edge of the connection plate, the other end is connected to the pleated end of the primary barrier . 5. The method of claim 4,
The other end of the connector is a connection structure between the base support structure and the storage tank insulating barrier having a shape corresponding to the pleats of the primary barrier. The method of claim 3,
The connecting portion further includes a third connecting portion provided in a curved form at each corner portion of the connecting plate, wherein the third connecting portion is a connection structure between the base support structure and the storage tank insulation barrier directly connected to the pleats of the primary barrier. The method of claim 1,
The connection part is provided to have a discontinuous shape at the point where they cross each other, the connection structure between the base support structure and the storage tank insulation barrier directly connected to the pleats of the primary barrier. The method of claim 1,
The bottom support portion is a connection structure between the base support structure and the storage tank insulation barrier having a tapered inclined surface gradually decreases in diameter from the inner bottom surface. 9. The method of claim 8,
The bottom support part is provided with a cone-shaped pipe having an upper diameter equal to the diameter of the intermediate support part, and the connection structure between the base support structure and the storage tank insulating barrier provided with a circular pipe having the same diameter as the intermediate support part and the top support part. . 9. The method of claim 8,
The peripheral portion of the first plate protruding outward from the junction of the bottom support and the intermediate support is disposed on the same plane as the secondary barrier and protrudes outward from the junction of the intermediate support and the top support. A peripheral structure of the second plate is a connection structure between the base support structure and the storage tank insulating barrier disposed on the same plane as the primary barrier. The method of claim 1,
The bottom support part, the intermediate support part and the top support part is a connection structure between the base support structure and the storage tank thermal insulation barrier is laminated in a layered step. The method of claim 11,
The bottom support portion, the intermediate support portion and the top support portion are each provided by a perforated pipe having a constant diameter, the diameter of the bottom support portion is larger than the diameter of the intermediate support portion, the diameter of the intermediate support portion is larger than the diameter of the top support portion Connecting structure between the large base support structure and the storage tank insulation barrier. The method of claim 12,
The first plate has the same outer diameter as the bottom support portion, and seals the upper portion of the bottom support portion and the lower portion of the intermediate support portion, and the second plate has the same outer diameter as the intermediate support portion, the top and the middle support portion. Connection structure between the base support structure and the storage tank insulation barrier sealing the lower part of the tower support.

Images