KR102129561B1 - Insulation structure and liquefied gas storage tank having the same - Google Patents

Abstract

An insulating structure is provided which is formed on the structural wall of the hull so as to support the sealing wall while forming the insulating wall of the liquefied gas storage tank.
The heat insulating structure includes a secondary heat insulating panel 130 installed on the structural wall (H); A primary thermal insulation panel 110 attached to the secondary thermal insulation panel; An anchor unit 150 formed on the primary insulating panel so that the sealing wall can be connected; It may include. The sealing wall is composed of a primary sealing layer 202 and a secondary sealing layer 204, and the primary sealing layer and the secondary sealing layer are stacked on the primary insulation panel by the anchor unit. , The secondary insulation panel may be formed by installing a partition member having a lattice structure therein.

Description

Insulation structure and liquefied gas storage tank having same {INSULATION STRUCTURE AND LIQUEFIED GAS STORAGE TANK HAVING THE SAME}

The present invention relates to an insulating structure of a liquefied gas storage tank installed inside a ship, and more specifically, to an inner wall surface of a liquefied gas storage tank installed inside the ship for storing and transporting liquefied gas, which is a liquid at a cryogenic state. It relates to an insulating structure and a liquefied gas storage tank having the same, which is installed and is fixed to the hull structure so as to support the sealing wall while performing the heat insulating function.

In general, liquefied gas includes liquefied natural gas (Liquefied Natural Gas, LNG), liquefied petroleum gas (Liquefied Petroleum Gas, LPG), liquefied ethane gas, liquefied ethylene gas, liquefied nitrogen, liquefied carbon dioxide, liquefied ammonia, and the like.

For example, liquefied natural gas is a natural gas that is one of fossil fuels, and the liquefied natural gas storage tank is a land storage tank installed on the ground or buried in the ground depending on the location where it is installed, or a vehicle such as a vehicle or ship. It is divided into a mobile storage tank installed in the.

Liquefied gas such as liquefied natural gas, liquefied petroleum gas, etc. has a risk of explosion when exposed to impact, and is stored in an extremely low temperature state, and the storage tank for storing it has a structure in which impact resistance and liquid tightness are maintained firmly. .

In addition, in contrast to an on-shore storage tank with little flow, a liquefied gas storage tank installed in a vehicle or a ship with a flow should take measures against mechanical stress due to flow. However, the liquefied gas storage tank installed on the ship provided with a countermeasure against mechanical stress can naturally be used also on the onshore storage tank, so the structure of the liquefied gas storage tank installed on the ship will be described as an example.

A ship in which a liquefied natural gas storage tank such as liquefied natural gas is installed has a hull of a double structure composed of an outer wall forming an outer shape and an inner wall formed inside the outer wall. The inner wall and the outer wall of the ship are formed integrally by being connected by a connecting wall. In some cases, the inner wall may be formed of a hull of a single structure in which the inner wall does not exist.

In addition, the inside of the hull, that is, the inside of the inner wall may be divided by one or more partition walls. The partition wall may be formed by a known copper dam installed on a conventional LNG carrier or the like.

Each inner space divided by the partition wall may be utilized as a storage tank for storing cryogenic liquids such as liquefied natural gas.

Here, the inner circumferential wall surface of the storage tank is sealed in a liquid-tight state by a sealing wall. That is, the sealing wall forms a single storage space by connecting a plurality of metal plates integrally with each other by welding, so that the storage tank can store and transport liquefied natural gas without leaking.

This sealing wall is connected to the inner wall or bulkhead of the ship by a plurality of anchor structures. Therefore, the sealing wall cannot be moved relative to the hull.

An insulating wall is arranged between the sealing wall and the inner wall or the partition wall to form an insulating layer. The insulating wall may include a corner structure disposed at the corner portion of the storage tank, an anchor structure disposed around the anchor member, and a planar structure disposed at a flat portion of the storage tank. That is, the entire insulating layer can be formed in the storage tank by these corner structures, anchor structures and planar structures.

Here, the anchor structure is composed of an anchor member that is directly connected and fixed between the hull and the sealing wall, and a heat insulating material provided around the anchor member.

In addition, the sealing wall is mainly supported by the anchor structure, the flat structure only supports the load of LNG applied to the sealing wall, and there is no direct coupling relationship between the planar structure and the anchor structure.

1 is a cross-sectional view showing a part of the corner of the liquefied natural gas storage tank according to the prior art.

The conventional liquefied natural gas storage tank 10 shown in FIG. 1 has secondary insulation walls 22, 32, 42 and primary insulation walls 24, 34 on the inner wall 12 or partition 14 of the hull structure. , 44) are sequentially installed to insulate between the inside and the outside of the storage tank. In addition, between the secondary insulating walls 22, 32, 42 and the primary insulating walls 24, 34, 44, secondary sealing walls 23, 33, 43 are installed, and the primary insulating walls 24 , 34, 44) is provided with a primary sealing wall 50 to seal the secondary between the inside and the outside of the storage tank.

The storage tank 10 of the liquefied natural gas configured as described above has a corner structure 20 installed at an inside corner, an anchor structure 30 installed at regular intervals on the bottom surface, and the corner structure 20 or an anchor. It includes a planar structure 40 that is inserted between the structures 30 and is slidably installed. At this time, the corner structure 20, the anchor structure 30, the planar structure 40 may be pre-fabricated with each unit module and then assembled to the storage tank 10, and the primary sealing wall 50 It is installed thereon to liquid-tight the insulating wall, thereby providing a space for liquefied natural gas (LNG) to be stored in the inner space.

1, the corner structure 20, the anchor structure 30, and the planar structure 40 are each of the primary insulating walls 24, 34, 44, and the secondary insulating walls 22, 32, 42) and secondary sealing walls 23, 33, and 43.

Meanwhile, in each of the structures 20, 30, and 40, the second sealing wall of each unit module and the contact surface of each insulating wall may be integrally formed by bonding with an adhesive. Typically, the secondary insulating walls 22, 32, and 42 are made of polyurethane foam, which is an insulating material, and a plate material attached to the lower portion. In addition, the primary insulating walls 24, 34, and 44 are made of polyurethane foam and a plate material attached with an adhesive thereon. In addition, the primary sealing wall is installed on top of the primary insulating walls 24, 34 and 44 and fixed to the anchor structure 30 by welding.

In addition, a flange 42a formed larger than the secondary insulating wall 42 is formed at a lower end of the secondary insulating wall 42 of the planar structure 40. The flange 42a is inserted into a groove formed in a lower end portion of the anchor structure 30, and is installed to allow some sliding movement.

In the illustrated example, each anchor structure 30 has an anchor support rod 36, a fixing member 37 located at the bottom, an anchor secondary insulating wall 32 and an anchor primary insulating wall 34, and the anchor 2 A secondary sealing wall 33 is connected between the primary insulating wall 32 and the anchor primary insulating wall 34. One end of the anchor support rod 36 is connected to the primary sealing wall 50 and the other end is connected to the inner wall 12 of the hull by the fixing member 37.

On the other hand, the anchor structure 30 is coupled by welding the primary sealing wall 50 to the top of the anchor support rod 36.

In addition, the anchor structure 30 is located at the connection point of the adjacent planar structure 40 and interconnects them, and the planar structure 40 is a hull inner wall 12 or a partition wall 14 constituting the storage tank 10. ). In addition, the fixing member 37 of the anchor structure 30 is installed around the anchor support rod 36.

However, in the conventional liquefied natural gas storage tank, the structure of the insulating wall structure is composed of the primary and secondary insulating walls, and the secondary sealing wall interposed therebetween, and the configuration is complicated. In addition, the structure for connecting the secondary sealing walls of each unit module to each other is complicated, and the connection work is not easy. In addition, the structure of the anchor portion or the connection portion of the secondary sealing wall is difficult to install and the reliability of sealing of the LNG to the secondary sealing wall is lowered, and there is a concern that LNG may leak.

In addition, a conventional anchor structure 30 for connecting and fixing the inner surface of the hull and the primary sealing wall 50 by a rod-shaped anchor support rod 36 is a storage tank according to the loading and unloading of LNG in a cryogenic condition. There was room for improvement in absorbing the stress generated during thermal deformation or deformation of the hull.

And, in recent years, as engine performance improves, consumption of Boil-Off Gas decreases, and thus, demand for a lower BOR (Boil-off Rate) is gradually increasing. To this end, if the thickness of the insulating structure is increased to increase the insulating performance, the weight increases, and the amount of shrinkage of the insulating structure against sloshing impact increases, resulting in a problem that the relative displacement between the sealing wall and the anchor structure is further increased. Therefore, the reliability of the sealing of LNG in the sealing wall is lowered, and there is a concern that LNG may leak.

It is necessary to continuously make efforts to improve the working efficiency and reduce the construction period and cost when manufacturing the storage tank by making the weight of each unit module lighter while maintaining the insulating performance of the insulating structure.

The present invention is to solve the conventional problems as described above, by reducing the density of at least a portion of the heat insulating material forming the heat insulating structure to achieve light weight while improving the heat insulation performance, and to have a low BOR of the heat insulating structure It is to provide a heat insulating structure and a liquefied gas storage tank having the same to reduce the relative displacement between the sealing wall and the anchor by arranging the reinforcing member therein even if the thickness is increased.

In addition, the present invention reduces the overall weight by removing the anchor rod that is installed to penetrate the heat insulating material and removes the heat transfer passage, and at the same time, the anchor unit to which the membrane is fixed is supported by a plywood stacked on the surface of the heat insulating material. It is to provide a heat insulating structure and a liquefied gas storage tank having the same to maintain a stable.

According to an aspect of the present invention for achieving the above object, as an insulating structure that is disposed on the structural wall of the hull to support the sealing wall while forming the insulating wall of the liquefied gas storage tank, a secondary installed on the structural wall An insulation panel; A primary insulation panel attached to the secondary insulation panel; An anchor unit formed on the primary insulation panel so that the sealing wall can be connected; Including, the sealing wall includes a primary sealing layer and a secondary sealing layer, the primary sealing layer and the secondary sealing layer is laminated on the primary insulation panel by the anchor unit, the The secondary insulating panel may be provided with an insulating structure of a liquefied gas storage tank, which is formed by installing a partition member having a lattice structure therein.

The primary insulating panel and the secondary insulating panel may be integrated by bonding to each other by PU bonding.

The anchor unit may be installed at the center of the upper surface of the primary insulation panel.

The primary insulating panel may include a primary insulating material made of polyurethane foam, etc., and upper and lower plywoods adhered to upper and lower surfaces of the primary insulating material.

The secondary heat insulation panel is filled with a cube box formed of an upper wall member, a lower wall member, and a side wall member, the partition member installed in the interior and width of the cube box, and a space partitioned by the partition member. Secondary insulation may be included.

The primary insulation material and the secondary insulation material are made of the same material, and the secondary insulation material may be formed to have a lower density than the primary insulation material.

The anchor unit is buried below the upper plywood of the primary insulation panel and fixedly interposed between the buried plywood and the upper plywood to form a gap between the upper plywood. An anchor base cap, a sliding portion that is slidably disposed in the horizontal direction in the anchor base cap and the secondary sealing layer is bonded, and a primary anchor fixed on the sliding portion and the primary sealing layer is bonded It may include.

The sliding portion may include an anchor base slidably stacked on the buried plywood, and a secondary anchor fixed on the anchor base and the secondary sealing layer joined.

The anchor unit may further include a membrane cap that protects an attachment portion between the primary sealing layer and the primary anchor after the primary sealing layer is attached on the primary anchor.

According to another aspect of the present invention, a liquefied gas storage tank that is manufactured to store a liquefied gas by installing a sealing wall and an insulating wall on a structural wall of the hull, wherein the insulating wall is provided at a corner portion of the liquefied gas storage tank. A corner structure to be installed, and a heat insulating structure for connecting the structural wall of the hull and the sealing wall, wherein the sealing wall includes a primary sealing layer and a secondary sealing layer, and the thermal insulating structure is the structure It includes a secondary insulation panel installed on the wall, a primary insulation panel attached to the secondary insulation panel, and an anchor unit formed on the primary insulation panel so that the sealing wall can be connected, and the primary The sealing layer and the secondary sealing layer are stacked on the primary insulation panel by the anchor unit, and the secondary insulation panel is provided with a liquefied gas storage tank formed by a partition member having a lattice structure therein. Can be.

According to the present invention, at least a portion of the heat insulating material forming the heat insulating structure is achieved by reducing the density of the heat insulating material, while providing a heat insulating structure and a liquefied gas storage tank having the same to maintain the strength by arranging the reinforcing member inside. Can be.

In addition, according to the present invention, by removing the anchor rod that is installed to penetrate the insulating material to reduce the overall weight and remove the heat transfer passage, at the same time, by supporting the anchor unit to which the membrane is fixed, the plywood layered on the surface of the insulating material An insulating structure and a liquefied gas storage tank having the same may be provided to keep the membrane stable.

According to the heat insulating structure of the present invention, it is possible to lighten the weight compared to the conventional heat insulating structure while maintaining the required strength of the heat insulating structure, so that it is possible to improve the working efficiency and reduce the construction period and cost when manufacturing the storage tank. do.

1 is a cross-sectional view partially showing a corner portion of a liquefied gas storage tank according to the prior art.
2 is a perspective view showing an insulating structure according to an embodiment of the present invention.
3 is a cross-sectional plan view of the heat insulating structure shown in FIG. 2.
4 is a cross-sectional side view of the heat insulating structure according to one embodiment of the present invention, taken along line IV-IV in FIG. 3.
5 is a side cross-sectional view showing a state in which the heat insulating structure according to an embodiment of the present invention is attached to a hull structure wall to form a liquefied gas storage tank.
FIG. 6 is an enlarged view of a main part showing an enlarged portion A of FIG. 5.
7 is an exploded side view showing the anchor unit of the heat insulating structure according to one embodiment of the present invention.

2 to 4 are a perspective view, a planar cross-sectional view, and a side cross-sectional view of an insulating structure according to an embodiment of the present invention for forming an insulating system of a liquefied gas storage tank.

5 is a side cross-sectional view showing a state in which the heat insulating structure according to an embodiment of the present invention is attached to a hull structure wall to form a liquefied gas storage tank, and FIG. 6 is an enlarged view of part A of FIG. 5. An enlarged view of one main part is shown. And, Figure 7 is an exploded side view of the anchor unit included in the heat insulating structure according to an embodiment of the present invention.

In the present specification, the expressions'upper part' and'lower part' are based on each heat insulating structure (see FIG. 4) before being attached to the structural wall of the hull to form the storage tank, and based on the entire storage tank no. Each of the insulating structures can be attached not only to the bottom of the storage tank, but also to the ceiling and sidewalls. For example, when each insulating structure is attached to the bottom of the storage tank, the'top' of each insulating structure and 'Bottom' has the same directionality as'Top' and'Bottom' in the entire storage tank, but when each heat insulating structure is attached to the ceiling and side of the storage tank, the'Top' in each heat insulating structure. And the'lower' has a different directionality from the'upper' and'lower' in the entire storage tank.

The liquefied gas storage tank formed by installing the heat insulating structure 102 according to one embodiment of the present invention, similar to the storage tank described above with reference to FIG. 1, is heat-insulated on the structural wall (hull) H of the hull. It has a wall 100 and a sealing wall 200 (see Fig. 5). However, in the conventional storage tank shown in FIG. 1, the insulating tank and the sealing wall are alternately stacked in turn, and the storage tank having the insulating structure 102 according to an embodiment of the present invention is on the insulating wall 100. The sealing wall 200 is installed, and the sealing wall is not interposed between the insulating walls. The insulating wall 100 may be formed by arranging a plurality of modular insulating structures 102 on the structural wall H of the hull.

2 to 4, the heat insulating structure 102 according to an embodiment of the present invention for forming the heat insulating wall 100, respectively, the primary insulating panel 110 and the secondary insulating panel ( 130), the primary insulating panel 110 and the secondary insulating panel 130 may be integrally bonded to each other by, for example, PU bonding (PU bonding).

An anchor unit 150 for supporting the sealing wall may be mounted at the center of the upper surface of the primary insulation panel 110. Although the drawing shows that the heat insulating structure 102 includes the anchor unit 150, the heat insulating structure according to the modified example may be made not to include the anchor unit 150. For example, the heat insulating structure 102 including the anchor unit 150 functions as an anchor structure, and the heat insulating structure not including the anchor unit can function as a planar structure. When manufacturing the liquefied gas storage tank, if necessary, an insulating structure serving as an anchor structure and an insulating structure serving as a planar structure can be appropriately arranged and mounted on the hull structural wall.

The insulating structure 102 may be made of, for example, a polyurethane foam material and a plywood. More specifically, the primary insulation panel 110 positioned closer to the sealing wall side includes, for example, a primary insulation material 114 made of polyurethane foam, etc., and an upper surface of the primary insulation material 114 And upper and lower plywoods 112 and 116 adhered to the lower surface. Adhesion between the primary insulating material 114 and the upper and lower plywoods 112 and 116 may be achieved, for example, by PU bonding.

In addition, the secondary insulating panel 130 positioned closer to the hull structural wall side may have an approximately hexahedral box shape in which a partition member 136 is installed in the vertical and horizontal directions. The hexahedral box and the partition member 136 composed of the upper wall member 132, the lower wall member 133, and the four side wall members 134 may be made of plywood, respectively. The inner space of the secondary insulation panel 130 having a box shape may be divided into a plurality of partitions (lattice structure) by the partition member 136, and each partitioned space is made of, for example, polyurethane foam 2 The car insulation 138 may be filled. The secondary insulating material 138 may be cut and inserted into a size suitable for each space, or may be foam-molded directly inside the secondary insulating panel 130.

The primary insulating material 114 and the secondary insulating material 138 may be made of the same material, for example, polyurethane foam, and the density of the secondary insulating material 138 is lower than the density of the primary insulating material 114. It can be foamed to have.

According to the present invention, the heat insulating structure 102 is made of two layers by attaching the primary heat insulating panel 110 and the secondary heat insulating panel 130 to better block heat inflow from the outside of the storage tank to the inside. On the other hand, by forming the secondary insulating material 138 filled in the secondary insulating panel 130 at a low density, it is possible to simultaneously achieve BOR improvement and weight reduction of the insulating structure.

Furthermore, by manufacturing the secondary insulating panel 130 in a box shape in which the inside is formed in a lattice structure by the partition member 136, the strength of the secondary insulating panel 130 can be improved even if a relatively low-density insulating material is used. It becomes possible.

The insulation structure 102 made by attaching the primary insulation panel 110 and the secondary insulation panel 130 to each other is pre-manufactured by being modularized in the factory in advance, and each modular insulation structure is transported to the site. , It is mounted on the hull structure wall to manufacture the storage tank.

5, the heat insulating structure 102 according to an embodiment of the present invention is attached to the hull structure wall H to form a liquefied gas storage tank.

A sealing wall 200 is stacked on the insulating wall 100 formed by arranging a plurality of insulating structures 102 on the hull structural wall H. The sealing wall 200 may include a primary sealing layer 202 and a secondary sealing layer 204. The primary sealing layer 202 and the secondary sealing layer 204 can each be formed by joining a plurality of membranes by welding. Each membrane may have wrinkles formed to avoid stress concentration due to thermal deformation.

The heat insulating structure 102 can be attached to the structural wall H of the hull, as described above, all the heat insulating structures 102 may include an anchor unit, and some of the heat insulating structures may not include an anchor unit. It might be. Whether to use an insulating structure that does not include an anchor unit, and whether or not to place it in any position even if used, may be determined in the design of the storage tank.

The sealing wall 200 including the primary sealing layer 202 and the secondary sealing layer 204 is a structural wall H of a hull through an insulating structure 102 having an anchor unit (hereinafter also referred to as an anchor structure). And can be connected. An insulating structure having no anchor unit (hereinafter, also referred to as a flat structure) is installed on the structural wall H of the hull, but is not mechanically connected to the sealing wall 200.

The planar structure supports only the load of liquefied gas received by the sealing wall 200 and has no direct coupling relationship with the sealing wall 200. The planar structure may be disposed between the anchor structures, or between the anchor structure and the corner structure (an insulating structure installed in the corner portion of the storage tank, not shown).

All the insulating structures 102, including the anchor structure and the planar structure, can be attached to the structural wall H of the tank by one or more connecting means. For example, the heat insulating structure 102 is a lower wall member 133 of the secondary heat insulating panel 130 that forms the heat insulating structure 102 on the stud bolt 106 fixedly installed on the structural wall H of the hull. ) Can be attached on the structural wall H of the hull by fastening with a nut 107.

An insertion hole through which the stud bolt 106 penetrates is formed in the lower wall member 133 forming the insulation box of the secondary insulation panel 130. When fixing the insulating structure 102 to the stud bolt 106, the primary insulating panel 110 of the insulating structure 102 to allow access to the nut 107 and the work tool to the stud bolt 106 And the secondary insulating panel 130 may be formed with a work hole 142 penetrating up and down, and the work hole 142 is filled by a plug member (not shown) after the fastening of the nut 107 is completed. The plug member may be formed of the same material as the first and second insulating materials 114 and 138.

A mastic 108 may be interposed between the heat insulating structure 102 and the hull structural wall H in order to correct a difference in spacing depending on the position.

The side surfaces of the plurality of heat insulating structures 102 arranged on the structural wall H may have spaced apart from each other by a predetermined distance (for example, 1 to 4 mm). The gap formed in this way provides a space through which the heat insulating structure 102 can flow when the ship is deformed so as to absorb the amount of deformation. The heat insulating structure 102 may be configured to allow slight movement (sliding) in a direction parallel to the structural wall H of the hull. A heat insulating material such as glass wool (104) having elasticity may be interposed between one heat insulating structure 102 and another adjacent heat insulating structure 102.

As described above with reference to FIGS. 2 to 4, the heat insulating structure 102 includes a secondary heat insulating panel 130 disposed at the bottom so as to face the structural wall H of the hull, and such a secondary heat insulating panel 130 ) May include a primary thermal insulation panel 110 stacked on top. In addition, an anchor unit 150 to which the sealing wall 200 is attached is provided on the upper surface of the primary insulation panel 110.

The sealing wall 200 includes a primary sealing layer 202 directly contacting liquefied gas accommodated in the storage tank, and a secondary sealing layer installed between the insulating wall 100 and the primary sealing layer 202 ( 204). The primary sealing layer 202 and the secondary sealing layer 204 are arranged to be spaced apart from each other at predetermined intervals. The sealing wall 200 may be slightly stretched due to temperature changes, and in this case, since the primary sealing layer 202 and the secondary sealing layer 204 may be damaged by contact with each other, they are spaced apart from each other. A support plate 206 may be installed between the primary sealing layer 202 and the secondary sealing layer 204 to maintain a constant distance.

In the primary sealing layer 202 and the secondary sealing layer 204, a plurality of wrinkles are formed to prevent damage during shrinkage and elongation. The corrugated portion is prevented from being damaged due to thermal deformation applied to the sealing wall 200 due to elongation or contraction due to a temperature change according to the loading of liquefied gas.

The primary sealing layer 202 and the secondary sealing layer 204 forming the sealing wall 200 are fixed to the anchor unit 150 of the heat insulating structure 102 by welding, as will be described later.

5 and 6, the anchor unit 150 installed on the heat insulating structure 102 as an anchor structure is higher than the upper plywood 112 of the primary heat insulating panel 110 included in the heat insulating structure. A buried plywood 152 that is buried below and forms a gap between the upper plywood 112, and an anchor base 154 that is slidably stacked on the buried plywood 152, and this anchor base Anchor base cap 156 which holds the 154 within the gap between the upper plywood 112 and the buried plywood 152, and is fixed on the anchor base 154 and the secondary sealing layer 204 is attached to It may include a secondary anchor 158 and a primary anchor 160 fixed to the secondary anchor 158 and to which the primary sealing layer 202 is attached.

The anchor base 154 and the secondary anchor 158 are integrally joined to form a sliding portion, and the sliding portion is an anchor base cap fixedly disposed within a gap formed by the embedded playwood 152 and the upper plywood 112. It moves within (156).

The anchor unit 150, after the primary sealing layer 202 is attached on the primary anchor 160, the membrane cap protecting the attachment portion between the primary sealing layer 202 and the primary anchor 160 (162) may be further included.

The anchor unit 150 of the heat insulating structure 102 according to one embodiment of the present invention is different in that it does not include an anchor rod, compared to the conventional anchor structure described with reference to FIG. 1. The anchor unit 150 of the heat insulating structure 102 according to an embodiment of the present invention does not include an anchor rod installed to penetrate the heat insulating structure 102 in the vertical direction, as described later with reference to FIG. 5. , Accordingly, only the insulation material and the plywood exist between the anchor base 154 included in the anchor unit 150 and the lower wall member 133 of the secondary insulation panel disposed at the bottom of the insulation structure 102. Can be made.

The anchor base 154 and the secondary anchor 158 are integrally formed by welding or the like. The anchor base 154 to which the secondary anchor 158 is integrally attached is interposed between the above-described gap, that is, between the upper plywood 112 and the buried plywood 152 of the primary insulation panel 110, and horizontally. Slidable in the direction. More specifically, the anchor base 154 is slidable in a horizontal direction between the lower surface of the anchor base cap 156 and the upper surface of the buried plywood 152 that are movably fitted within the aforementioned gap. Intervene. Since the secondary anchor 158 is integrally fixed to the upper surface of the anchor base 154, it can move in the horizontal direction together with the anchor base 154.

In the factory manufacturing the insulating structure 102, among the components included in the anchor unit 150, a buried plywood 152, an anchor base 154, an anchor base cap 156, and a secondary anchor 158 ) Is assembled on the upper portion of the primary insulation panel 110, and then supplied to the site in that state. The primary anchor 160 and the membrane cap 162 are supplied to the site in a part state, and the insulating structure 102 is attached to the structural wall H of the hull at the site and the primary and secondary sealing layers 202, 204).

More specifically, the primary anchor 160 is welded to the upper surface of the secondary anchor 158 after bonding the secondary sealing layer 202 on the secondary anchor 158 of the anchor unit 150. Attached by the like. Subsequently, the membrane cap 162, after bonding the primary sealing layer 204 on the primary anchor 160, covers the bonding portion between the primary anchor 160 and the primary sealing layer 204. It may be attached on the primary sealing layer 204 for protection.

As such, during the installation of the thermal insulation system of the liquefied gas storage tank, the primary anchor 160 and the membrane cap 162 are separately prepared without being assembled with the remaining components of the anchor unit 150, and the anchor unit After bonding the secondary sealing layer 204 on the secondary anchor 158 of 150, it may be sequentially assembled.

As described above, although specific embodiments have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the technical spirit of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims described below, but also by the claims and equivalents.

100: insulation wall, 102: insulation structure, 106: stud bolt, 107: nut, 108: mastic, 110: primary insulation panel, 112: upper plywood, 114: primary insulation, 116: lower plywood, 130 : Secondary insulation panel, 132: upper wall member, 133: lower wall member, 134: side wall member, 136: partition member, 138: secondary insulation, 142: working hole, 150: anchor unit, 152: buried plywood, 154: anchor base, 156: anchor base cap, 158: secondary anchor, 160: primary anchor, 162: membrane cap, 200: sealing wall, 202: primary sealing layer, 204: secondary sealing layer, 206: support Plate.

Claims (10)

An insulating structure that is arranged on the structural wall of the hull to support the sealing wall while forming the insulating wall of the liquefied gas storage tank,
A secondary insulating panel installed on the structural wall;
A primary insulation panel attached to the secondary insulation panel;
An anchor unit formed on the primary insulation panel so that the sealing wall can be connected;
It includes,
The sealing wall includes a primary sealing layer and a secondary sealing layer, and the primary sealing layer and the secondary sealing layer are stacked on the primary insulation panel by the anchor unit,
The primary insulating panel is integrated by being laminated and adhered to the secondary insulating panel, and the primary insulating material included in the primary insulating panel and the secondary insulating material included in the secondary insulating panel are made of the same material, The secondary insulating material is formed to have a lower density than the primary insulating material,
The secondary insulating panel is formed by installing a partition member having a grid structure therein,
Between the anchor unit and the structural wall of the hull, the primary insulation panel and the secondary insulation panel are present without an anchor rod penetrating the insulation structure, so that the primary sealing layer and the secondary sealing layer are the anchor. The unit, the primary insulation panel, the anchor unit is installed, and is connected to the structural wall through the secondary insulation panel, which is attached to the primary insulation panel and is integrated, an insulating structure of the liquefied gas storage tank. The method according to claim 1,
The primary insulating panel and the secondary insulating panel are bonded to each other by PU bonding and integrated, the heat insulating structure of the liquefied gas storage tank. The method according to claim 1,
The anchor unit is installed in the center of the upper surface of the primary insulation panel, the insulating structure of the liquefied gas storage tank. The method according to claim 1,
The primary insulating panel, a primary insulating material made of a polyurethane foam, and the upper and lower plywood adhered to the upper and lower surfaces of the primary insulating material, the insulating structure of the liquefied gas storage tank. The method according to claim 4,
The secondary heat insulation panel is filled with a cube box formed of an upper wall member, a lower wall member, and a side wall member, the partition member installed in the interior and width of the cube box, and a space partitioned by the partition member. Insulating structure of the liquefied gas storage tank, including a secondary insulating material. delete The method according to claim 1,
The anchor unit is buried below the upper plywood of the primary insulation panel and fixedly interposed between the buried plywood and the upper plywood to form a gap between the upper plywood. An anchor base cap to be, a sliding portion slidably disposed in the horizontal direction in the anchor base cap and the secondary sealing layer is bonded, and a primary anchor fixed to the sliding portion and the primary sealing layer is bonded Including, the insulating structure of the liquefied gas storage tank. The method according to claim 7,
The sliding portion, the anchor structure is slidably laminated on the buried plywood, and a secondary anchor fixed on the anchor base and the secondary sealing layer is bonded, the insulating structure of the liquefied gas storage tank. The method according to claim 7,
The anchor unit further comprises a membrane cap protecting the attachment portion between the primary sealing layer and the primary anchor after the primary sealing layer is attached on the primary anchor, of the liquefied gas storage tank. Insulation structure. A liquefied gas storage tank manufactured to store liquefied gas by installing a sealing wall and an insulating wall on the structural wall of the hull,
The insulating wall includes a corner structure installed at a corner portion of the liquefied gas storage tank, and an insulating structure for connecting the structural wall of the hull and the sealing wall,
The sealing wall includes a primary sealing layer and a secondary sealing layer,
The heat insulating structure includes a secondary heat insulating panel installed on the structural wall, a primary heat insulating panel attached to the secondary heat insulating panel, and an anchor unit formed on the primary heat insulating panel so that the sealing wall can be connected. It includes,
The primary sealing layer and the secondary sealing layer are laminated on the primary insulating panel by the anchor unit,
The primary insulating panel is integrated by being laminated and adhered to the secondary insulating panel, and the primary insulating material included in the primary insulating panel and the secondary insulating material included in the secondary insulating panel are made of the same material, The secondary insulating material is formed to have a lower density than the primary insulating material,
The secondary insulating panel is formed by installing a partition member having a grid structure therein,
Between the anchor unit and the structural wall of the hull, the primary insulating panel and the secondary insulating panel are present without an anchor rod penetrating the insulating structure, so that the primary sealing layer and the secondary sealing layer are the anchor. A liquefied gas storage tank which is connected to the structural wall through the unit, the primary insulation panel on which the anchor unit is installed, and the secondary insulation panel integrated with the primary insulation panel.

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