KR102416719B1 - Cargo for liquefied gas - Google Patents

Abstract

A liquefied gas cargo hold is disclosed. A liquefied gas cargo hold according to an embodiment of the present invention is located inside the hull, the storage tank for accommodating the liquefied gas; an internal space provided between the hull and the storage tank; a dividing wall dividing the inner space into a first area and a second area; a powder insulating material filled in the first region to insulate the storage tank; and a heat insulating panel provided on an outer surface of the storage tank of the second region to insulate the storage tank.

Description

Liquefied gas cargo hold {CARGO FOR LIQUEFIED GAS}

The present invention relates to a liquefied gas cargo hold, and more particularly, to a liquefied gas cargo hold including an insulating structure for effectively insulating low-temperature liquefied gas.

Liquefied gas is made into a liquid by cooling or compressing the gas, and is phase-changed into a liquid by cooling a gas at room temperature for convenience of transportation and storage. One of the widely used and important resources among liquefied gas is liquefied natural gas (LNG). Liquefied natural gas refers to a colorless and transparent cryogenic liquid whose volume is reduced to 1/600 by cooling natural gas containing methane to -162 degrees Celsius.

Recently, as liquefied natural gas is used as an important energy resource, an efficient transportation method capable of transporting liquefied natural gas in large quantities from a production site to various demanding destinations has been studied. As part of these efforts, a liquefied gas transport vessel capable of transporting a large amount of liquefied natural gas by sea was developed.

Liquefied gas cargo holds that can withstand cryogenic temperatures are installed in liquefied gas transport ships to store and store liquefied natural gas. Since liquefied natural gas has a vapor pressure higher than atmospheric pressure and has a very low boiling temperature, the liquefied gas cargo hold must be made of a material that can withstand extremely low temperatures, and a unique insulation structure that is strong against other thermal stress and thermal contraction and can prevent heat intrusion will need

Storage tanks are classified into independent type and membrane type depending on whether the load of cargo is applied directly to the insulating structure. Among them, the independent storage tank has a relatively simple structure and can accommodate liquefied natural gas stably, so it is adopted and used in various liquefied gas transport ships.

In such an independent storage tank, a storage tank is installed in a cargo hold receiving space formed in a hull of a floating offshore structure such as a ship in structure, and an insulating structure is installed between the outer surface of the storage tank and the cargo hold receiving space.

As the heat insulating structure, a heat insulating member made of a plate-shaped polyurethane foam (PUF) or the like or a powder insulating material made of an independent powder form may be used. However, among them, powder insulation has a problem in that it is difficult to fill the lower part of the storage tank. Powder insulation is generally pressurized and injected through the upper part of the storage tank, because it is difficult to supply the pressure for filling the powder insulation material to the lower portion of the storage tank.

Republic of Korea Patent Publication No. 10-2008-0097519 (published on Nov. 06, 2008)

The present invention is to provide a liquefied gas cargo hold including a thermal insulation structure that can effectively insulate the loaded liquefied gas.

The present invention is to provide a liquefied gas cargo hold that can quickly and easily perform the installation work of the insulating structure,

An object of the present invention is to provide a liquefied gas cargo hold that can stably insulate the liquefied gas loaded by the simple structure.

According to an aspect of the present invention, it is located inside the hull, the storage tank for accommodating the liquefied gas; an internal space provided between the hull and the storage tank; a dividing wall dividing the inner space into a first area and a second area; a powder insulating material filled in the first region to insulate the storage tank; A liquefied gas cargo hold comprising a; is provided on the outer surface of the storage tank of the second region to insulate the storage tank may be provided.

In addition, the second region may be provided between the lower portion of the storage tank and the hull in which it is difficult to fill the powder insulating material.

In addition, the separation wall may include a slide member interposed between the hull and the storage tank; a guide member fixed to the hull and guiding the movement of the slide member; and an elastic member interposed between the hull and the slide member, respectively, and between the slide member and the storage tank, wherein the slide member may be moved according to a change in size according to thermal deformation of the storage tank.

In addition, the dividing wall includes a lower support member fixed to the hull; a first wall member having one end supported by the lower support member; a second wall member interposed between the other end of the first wall member and the storage tank; a connecting member for binding the first wall member and the second wall member; an auxiliary support member provided above the lower support member to assist in binding the first wall member and the second wall member; and an elastic member interposed between the second wall member and the storage tank.

In addition, the dividing wall includes a lower support member fixed to the hull; a first wall member having one end supported by the lower support member; a second wall member interposed between the other end of the first wall member and the storage tank; a connecting member for binding the first wall member and the second wall member; an upper support member fixed to the storage tank and supporting the second wall member; a first elastic member provided between the hull and the lower support member; It may include a second elastic member provided between the second wall member and the upper support member.

In addition, it may further include a third elastic member interposed between the first wall member and the second wall member.

In addition, the dividing wall includes a lower support member fixed to the hull; a first wall member having one end supported by the lower support member; a second wall member having one end connected to the other end of the first wall member; and a third wall member having one end connected to the other end of the second wall member and having the other end fixed to the storage tank.

In addition, an elastic member may be installed between the first wall member and the second wall member, and between the second wall member and the third wall member.

In addition, the support block for supporting the storage tank and coupled to the insulation panel; It may further include a support stool installed on the hull to support or constrain the support block.

The liquefied gas cargo hold according to the present invention can effectively and stably insulate the liquefied gas loaded in the storage tank by using the insulation method by the powder insulation material and the insulation panel together.

In addition, by using a powder insulation material that can be quickly and easily filled, the efficiency of the installation and operation of the cargo hold is improved.

In addition, by insulating the storage tank with an insulating panel at a location where it is difficult to insert the powder insulating material, the cargo hold installation work can be performed quickly and easily.

In addition, the partition wall dividing the first area filled with powder insulation and the second area where the insulation panel is used includes a slide member movable along the guide member, so that it can easily respond to size changes due to thermal deformation of the storage tank. have. This is because the size of the storage tank is contracted or expanded according to the amount of liquefied gas stored therein.

In addition, since the separation wall includes the first wall member and the second wall member made of different materials, it is possible to effectively separate the first region and the second region without affecting thermal insulation performance.

In addition, the dividing wall may include a first wall member, a second wall member, and a third wall member made of different materials, and a partition wall having excellent structural strength and excellent thermal insulation performance may be provided.

In addition, by providing an elastic member between the wall members or support members constituting the dividing wall, it is possible to easily respond to the size change according to the thermal deformation of the storage tank.

1 is a cross-sectional view showing a conventional liquefied gas cargo hold.
2 is a cross-sectional view showing a liquefied gas cargo hold according to a first embodiment of the present invention.
3 is an enlarged view of part A of FIG. 2 .
4 is a cross-sectional view showing a liquefied gas cargo hold according to a second embodiment of the present invention.
FIG. 5 is an enlarged view of part B of FIG. 4 .
6 shows a dividing wall according to a third embodiment of the present invention.
7 shows a dividing wall according to a fourth embodiment of the present invention.
8 is a cross-sectional view showing a liquefied gas cargo hold according to a fifth embodiment of the present invention.
FIG. 9 is an enlarged view of part C of FIG. 8 .
10 shows a dividing wall according to a sixth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented to sufficiently convey the spirit of the present invention to those of ordinary skill in the art to which the present invention pertains. The present invention is not limited to the embodiments presented herein, and may be embodied in other forms. The drawings may omit the illustration of parts not related to the description in order to clarify the present invention, and slightly exaggerate the size of the components to help understanding.

1 is a cross-sectional view showing a conventional liquefied gas cargo hold. Referring to the drawings, the conventional method of insulating the storage tank 20 using the powder insulating material P has a problem in that it is difficult for the powder insulating material P to be filled in the lower part of the storage tank 20 . This is because it is difficult to uniformly fill the powder insulating material P to the lower part of the storage tank 20 because the powder insulating material P is generally pressurized and injected through the upper part of the storage tank 20 . Therefore, an appropriate means for insulating the lower part of the liquefied gas storage tank 20 is required, and the present invention proposes a method for solving this problem. Hereinafter, each part in FIG. 1 will be described first.

The hull 10 is an offshore structure, and may be an LNG carrier that transports or stores liquid cargo such as LNG on the sea, a ship such as an LNG RV, or an offshore plant such as an LNG FPSO or an LNG FSRU. In addition, the hull 10 may be composed of a double hull of an outer hull and an inner hull, and a storage for storing liquefied gas in the inner space 11 of the hull 10 inner plate The tank 20 is located.

The storage tank 20 is to be used to store liquefied gas of cryogenic temperature, such as liquefied natural gas (LNG), liquefied petroleum gas (LPG), dimethyl ether (DME: Dimethyl Ether). can That is, the storage tank 20 is a carrier that transports liquefied gas cargo such as an LNG carrier, an LNG RV (Regasification Vessel) carrier, an LPG carrier, or an ethylene carrier, or a FSRU (Floating Storage Regasification Unit), FPSO (Floating Production) Storage Offloading) and BMPP (Barge Mounted Power Plant) can be applied to offshore floating facilities for storage and production of liquefied gas. In addition, the storage tank 20 may be applied not only to offshore facilities but also to land facilities for storing liquefied gas.

The liquefied gas stored in the storage tank 20 may be used to encompass all gas fuels generally stored in a liquid state, such as LNG or LPG, ethylene, ammonia, etc., and furthermore, by heating or pressurization, The case may also be expressed as liquefied gas for convenience.

The storage tank 20 may be built together with the hull 10 as an independent type storage tank, and may be manufactured separately from the hull 10 and mounted inside the hull 10 . Furthermore, the storage tank 20 may include a barrier structure (not shown) and a heat insulating layer (not shown) for accommodating the liquefied gas. At this time, the barrier structure may be in contact with the stored material stored in the storage tank 20 , and may absorb the sloshing impact caused by the flow of the stored material. In addition, the barrier structure may be made of an alloy resistant to low temperature such as aluminum alloy, SUS, and 9% nickel to accommodate cryogenic liquefied gas. In addition, a liquid dome (not shown) in which a pipe for supplying liquefied gas to the storage tank 20 or unloading the liquefied gas from the storage tank 20 is installed may be provided on the upper side of the storage tank 20 . .

The support means 30 is for maintaining the storage tank 20 in the hull 10, and the tank support 31 that largely supports the load of the storage tank 20, rolling or pitching of the hull 10, etc. It includes a rotation restraint body 32 that prevents movement or rotation of the storage tank 20 by the As such, the support means 30 is interposed between the hull 10 and the storage tank 20 in order to maintain the storage tank 20 in the interior of the hull 10 .

The tank support 31 is located in the lower portion of the storage tank 20, and a support member (not shown) fixed to the hull bottom 10a, and a block member (not shown) for supporting the storage tank 20, and storage It may include a movement limiting member (not shown) installed in the tank 20 to restrict the movement of the block member (not shown). In this case, the block member may be made of a material that can easily block heat conduction, such as a Compressed Hard Wooden Block, to support the lower surface of the storage tank 20 .

The rotation restraint body 32 may be provided to prevent the storage tank 20 from flowing or rotating in the internal space 11 of the hull 10 . To this end, the rotation restraint body 32 includes a key member (not shown) provided in the storage tank 20 like a pitching key, a stopper member (not shown) installed in the hull 10, a key member and a stopper member It may include a buffer member (not shown) interposed therebetween. The key member protruding from the storage tank 20 is restrained by a stopper member provided on the hull.

Figure 2 is a cross-sectional view showing a liquefied gas cargo hold according to the first embodiment of the present invention, Figure 3 is an enlarged view of the portion A of Figure 2.

Referring to the drawings, the liquefied gas cargo hold according to the first embodiment of the present invention is located inside the hull 10, the storage tank 20 for accommodating the liquefied gas, and an internal space provided between the hull and the storage tank 20 (11), the dividing wall 100 dividing the inner space 11 into a first area 11a and a second area 11b, filled in the first area 11a, powder for insulating the storage tank 20 A heat insulating material (P), provided on the outer surface of the storage tank (20) of the second region (11b) includes a heat insulating panel (40) for insulating the storage tank (20). Hereinafter, each configuration in the first embodiment will be described.

The inner space 11 is provided between the inner surface of the hull 10 and the storage tank 20 . The storage tank 20 is an independent type, and is spaced apart from the inner surface of the hull 10 by a predetermined interval, and the inner space 11 is provided between the outer surface of the storage tank 20 and the hull 10 . This inner space 11 may be divided into a first area 11a and a second area 11b by a partition wall 100 to be described later.

The first region 11a includes the front, rear, or side portions of the storage tank 20 and the inner space 11 excluding the second region 11b. The first region 11a may be filled with a powder insulating material P.

The powder insulating material (P) is filled in the first region (11a) to insulate the liquefied natural gas accommodated in the storage tank (20). The powder insulating material P may be formed in an independent powder form and may be filled in the first region 11a by a filling pump (not shown) or the like. Since the powder insulating material (P) is in the form of powder, it is filled more quickly than installing a separate insulating layer on the storage tank 20, which in turn makes it easy and quick to manufacture and install a liquefied gas cargo hold. And the powder insulating material (P) may be at least one of a glass bubble (Glass bubble) and perlite (Perlite) excellent in insulating properties for thermal insulation.

The second region 11b may be provided adjacent to the lower portion of the storage tank 20 in which the powder insulating material P is not easily filled. The powder insulation P is generally pressurized and put through the upper part of the storage tank 20, because it is difficult to supply the pressure for filling the powder insulation material 20 filled in the lower part of the storage tank 20. . As described above, since it is difficult to fill the second region 11b with the powder insulating material P, an insulating panel 40 to be described later can be attached instead of the powder insulating material P for thermal insulation of the storage tank 20. have. On the other hand, the second region 11b may optionally be included in the vicinity of the support structure in which the powder insulation P between the upper portion of the storage tank 20 and the hull 10 is difficult to be filled as needed, but is not limited thereto.

The insulation panel 40 is provided under the storage tank 20 of the second region 11b to insulate the storage tank 20 in which cryogenic liquefied gas is stored from the outside. The insulation panel 40 may be made of a material such as, for example, polyurethane foam. The heat insulation panel 40 may be formed of, for example, a plurality of prefabricated heat insulation panels 40 attached to the surface of the storage tank 20 . In this case, the plurality of heat insulation panels 40 may be interconnected by a cushion joint (not shown), and the storage tank 20 surface by a fastening member such as a support block 51 and studs, which will be described later. can be attached to

The support structure 50 corresponds to the conventional support means 30 of FIG. 1 , and supports the storage tank 20 , but at the same time fixing the heat insulation panel 40 may be different. This support structure 50 is a support block 51 that is bound to the insulation panel 40 to position the insulation panel 40 on the outer surface of the storage tank 20, and is installed on the hull to support or support the support block 51 It may include a restraining support stool 52 .

The dividing wall 100 may divide the inner space 11 into a first area 11a and a second area 11b. The separation wall 100 may be installed diagonally at the corner of the storage tank 20 and the hull 10 as in FIG. 2 , and between the storage tank 20 and the hull 10 as in the second embodiment of FIG. 4 . It may be installed vertically, but is not limited thereto.

Separation wall 100 includes a slide member 120 interposed between the hull 10 and the storage tank 20, and a guide member 110 that is fixed to the hull and guides the movement of the slide member 120, It includes an elastic member 130 interposed between the slide member 120 and the storage tank 20 between the hull and the slide member 120 , respectively.

The guide member 110 guides the bidirectional movement of the slide member 120 . The guide member 110 may be fixed to the hull 10 and provided in a form in contact with both sides of the slide member 120 . And since the guide member 110 is not in contact with the cryogenic storage tank 20, it may be made of a high-strength iron material.

Since the slide member 120 is movable between the hull 10 and the storage tank 20 along the guide member 110 , it can respond to a size change according to the thermal deformation of the storage tank 20 . For example, after unloading the cryogenic liquefied gas stored in the storage tank 20, the storage tank 20 expands due to a rise in temperature, and a load is applied to the storage tank 20 so that it may be damaged. (120) prevents this. This change in size of the storage tank 20 is due to contraction or expansion according to the amount of liquefied gas stored therein. That is, the slide member 120 flows between the hull 10 and the storage tank 20 at a predetermined interval to absorb the pressure load during thermal deformation of the storage tank 20 to prevent damage to the storage tank 20 . .

On the other hand, since the slide member 120 is connected between the hull 10 and the storage tank 20 via the elastic member 130 that facilitates heat transfer, a compression-reinforced wood block (Compressed Hard Hardwood) for thermal insulation of the hull 10 It may be composed of a material that can easily block heat conduction, such as a wooden block).

The elastic member 130 may be a compression spring providing an elastic force to the slide member 120 between the hull 10 and the slide member 120 , and between the slide member 120 and the storage tank 20 , respectively. The elastic member 130 may include a second elastic member 132 connecting the hull 10 and the slide member 120 and a first elastic member 131 connecting the slide member 120 and the storage tank 20 . can

As such, in the liquefied gas cargo hold according to the first embodiment, the efficiency of installation and operation of the cargo hold is improved by using a powder insulating material (P) that can be quickly and easily filled in part of the insulation method.

In addition, by insulating the storage tank 20 with an insulating panel 40 at a location where it is difficult to insert the powder insulating material P, the cargo hold installation work can be performed quickly and easily. This makes it possible to effectively and stably insulate the liquefied gas loaded in the storage tank 20 by using the powder insulation P and the insulation method by the insulation panel 40 together.

In addition, the partition wall 100 dividing the first area 11a filled with the powder heat insulating material P and the second area 11b where the heat insulation panel is used is movable along the guide member 110 slide member 120 Including, it is possible to easily respond to the size change according to the thermal deformation of the storage tank (20).

4 is a cross-sectional view showing a liquefied gas cargo hold according to a second embodiment of the present invention, and FIG. 5 is an enlarged view of a portion B of FIG. 4 .

Referring to the drawings, the partition wall 200 of the cargo hold according to the second embodiment of the present invention includes a lower support member 210 fixedly installed on the hull, and a first end supported by the lower support member 210 . The wall member 220, the second wall member 230 interposed between the other end of the first wall member 220 and the storage tank 20, and the first wall member 220 and the second wall member 230 The auxiliary support member 250 and the second wall member provided on the upper side of the connecting member 240 for binding the lower support member 210 and assisting the binding of the first wall member 220 and the second wall member 230 to each other. It may include an elastic member 260 interposed between the 230 and the storage tank 20 .

In the description of the liquefied gas cargo hold according to the second embodiment of the present invention to be described below, the same as the description of the liquefied gas cargo hold according to the first embodiment of the present invention, except when additionally described with separate reference numerals In order to prevent duplication of contents, the description is omitted.

Since the lower support member 210 fixes one end of the first wall member 220, it supports the load of the powder insulating material P applied to the first wall member 220 and the second wall member 230 connected thereto. do. The lower support member 210 may be made of a material of special steel for cryogenic use, such as aluminum steel, stainless steel, and 35% nickel steel, which has great rigidity and is less deformed even at cryogenic temperatures.

Since the first wall member 220 is supported by the lower support member 210 and does not come into contact with the storage tank 20 , it is relatively rigid as compared to the second wall member 230 to be described later, such as the lower support member 210 . It can be composed of this large special steel. The first wall member 220 separates the first region 11a and the second region 11b together with the second wall member 230 and bears the load of the powder insulating material P.

Since the second wall member 230 has one end in contact with the storage tank 20, it may be made of a material that is easy to block heat conduction, such as a Compressed Hard Wooden Block. Alternatively, a plurality of plywoods may be bonded by an adhesive, and durability may be reinforced. As described above, since the first wall member 220 and the second wall member 230 are made of different materials, the two needs of structural strength and heat insulation can be mutually satisfied.

The connecting member 240 may be coupled to the first wall member 220 and the second wall member 230 in a bolting manner, respectively, to connect the first wall member 220 and the second wall member 230 . have. The connection member 240 corresponds to the shape of the first wall member 220 and the second wall member 230 , and a step may be formed by a difference in thickness of each member.

The auxiliary support member 250 reinforces the connection between the first wall member 220 and the second wall member 230 bound by the connecting member 240 . This is to withstand the load of the powder insulating material P applied to the first wall member 220 and the second wall member 230 . The auxiliary support member 250 may prevent excessive stress concentration by supporting the central portions of the first wall member 220 and the second wall member 230 in a form surrounding the connecting member 240 , respectively.

The elastic member 260 is provided between the second wall member 230 and the storage tank 20 , and elastically receives the load applied to the partition wall 200 by thermal expansion or contraction of the storage tank 20 . For example, when the storage tank 20 expands, the elastic member 260 contracts, and when the storage tank 20 contracts, the elastic member 260 expands.

As such, in the second embodiment, since the dividing wall 200 includes the first wall member 220 and the second wall member 230 made of different materials, the first region ( 11a) and the second region 11b are separable.

6 shows a dividing wall according to a third embodiment of the present invention.

Referring to the drawings, the dividing wall 300 according to the third embodiment of the present invention includes a lower support member 310 fixedly installed on the hull, and a first wall member ( 320), a second wall member 330 interposed between the other end of the first wall member 320 and the storage tank 20, and a connecting member for binding the first wall member 320 and the second wall member 330 (340), the upper support member 350 that is fixedly installed in the storage tank 20 and supports the second wall member 330, the first elastic member 360 provided between the hull and the lower support member 310, and a second elastic member 370 provided between the second wall member 330 and the upper support member 350 .

In the description of the liquefied gas cargo hold according to the third embodiment of the present invention to be described below, the liquefied gas cargo hold or the second embodiment according to the first embodiment of the present invention as described above, except for cases where separate reference numerals are used to additionally describe it. As the same as the description of the liquefied gas cargo hold by

Similarly, the illustrated first wall member 320, the second wall member 330, and the connecting member 340 are the first wall member 220, the second wall member 230, and the connection in the first embodiment. It corresponds to the member 240 and performs substantially the same role and function, and thus a detailed description thereof will be omitted.

The lower support member 310 is fixed to the hull 10 by a bolting method, and a first elastic member 360 may be provided between the hull 10 and the hull 10 . The first elastic member 360 relieves the load or impact applied to the hull 10 by the contraction or expansion of the storage tank 20 .

Similar to the lower support member 310 , the upper support member 350 may be installed on the outer surface of the storage tank 20 to fix one end of the second wall member 330 . And the upper support member 350 is powder applied to the first wall member 320 and the second wall member 330 connected thereto together with the lower support member 310 for fixing one end of the first wall member 320 . It is possible to support the load of the heat insulating material (P).

In addition, the upper support member 350 may be made of a cryogenic material. Here, the cryogenic material may be a cryogenic high manganese steel or a carbon composite material that can be used in a cryogenic environment. The characteristics of these cryogenic materials are that it is light in weight, unlike aluminum/stainless steel, has a low density and low coefficient of thermal expansion comparable to aluminum, and it is easy to control various properties through laminated design, and it is possible to select various reinforcement materials and base materials. Therefore, it is characterized by very high applicability to products that are exposed to cryogenic temperatures and perform structural and functional roles.

In addition, a second elastic member 370 is provided between the upper support member 350 and the second wall member 330 to prevent damage to the separation wall 300 due to thermal expansion or contraction of the storage tank 20 . . For example, when the storage tank 20 expands, the second elastic member 370 contracts, and when the storage tank 20 contracts, the second elastic member 370 expands.

7 shows a dividing wall according to a fourth embodiment of the present invention. Referring to this, in the fourth embodiment, the third elastic member 400 may be additionally interposed between the first wall member 320 and the second wall member 330 . This third elastic member 400 relieves the impact transmitted from the first wall member 320 to the second wall member 330, or in the reverse direction.

8 is a cross-sectional view showing a liquefied gas cargo hold according to a fifth embodiment of the present invention, and FIG. 9 is an enlarged view of part C of FIG. 8 .

Referring to the drawings, the dividing wall 500 according to the fifth embodiment includes a lower support member 510 that is fixedly installed on the hull, and a first wall member 520 whose one end is supported by the lower support member 510 and , a second wall member 530 having one end connected to the other end of the first wall member 520 , one end connected to the other end of the second wall member 530 , and the other end being fixedly installed in the storage tank 20 . It may include a three-wall member (540).

In the description of the liquefied gas cargo hold according to the fifth embodiment to be described below, it is the same as the description of the liquefied gas cargo hold according to the first embodiment of the present invention described above, except for cases where separate reference numerals are used to additionally describe the contents. A description is omitted to avoid duplication.

The lower support member 510 may fix one end of the first wall member 520 . Accordingly, the lower support member 510 supports the load of the powder insulating material P applied to the first wall member 520 and the second wall member 530 and the third wall member 540 connected thereto. The lower support member 510 may be made of a material of special steel for cryogenic use, such as aluminum steel, stainless steel, and 35% nickel steel, which has great rigidity and is less deformed even at cryogenic temperatures.

Since the first wall member 520 is supported by the lower support member 510 and does not come into contact with the cryogenic storage tank 20 , like the lower support member 510 , a second wall member 530 or a third to be described later Compared to the wall member 540, it may be made of special steel having relatively high rigidity. In addition, the second wall member 530 has the same shape as the first wall member 520 , but may be made of a material that can easily block heat conduction, such as a Compressed Hard Wooden Block.

The third wall member 540 may be made of a cryogenic material. In this case, the cryogenic material may be a cryogenic high manganese steel or a carbon composite material that can be used in a cryogenic environment. The characteristics of these cryogenic materials are that they are light in weight, unlike conventional aluminum/stainless steel, have a low density and a low coefficient of thermal expansion comparable to aluminum. Therefore, it is characterized by very high applicability to products that are exposed to cryogenic temperatures and perform structural and functional roles. In addition, the third wall member 540 may be joined to the storage tank 20 by the coupling portion 550 . In this case, the coupling part 550 may be a welding part formed by welding, for example.

As such, in the fifth embodiment, including the first wall member 520, the second wall member 530, and the third wall member 540 made of different materials, the first wall member 520 has structural strength. The second wall member 530 and the third wall member 540 block heat transfer between the storage tank 20 and the hull 10, thereby providing a separation wall 500 with excellent structural strength and excellent thermal insulation performance. can be

10 shows a dividing wall according to a sixth embodiment of the present invention. Referring to this, in the sixth embodiment, the elastic member 600 is provided between the first wall member 520 and the second wall member 530 and between the second wall member 530 and the third wall member 540, respectively. can be installed. As such, in the sixth embodiment, a first elastic member 610 for relieving an impact or load transmitted between the first wall member 520 and the second wall member 530 is provided, and the second wall member 530 and By providing the second elastic member 620 for alleviating the impact or load transmitted between the third wall members 540, the partition wall can have improved durability.

Although the present invention has been described with reference to an embodiment shown in the accompanying drawings, this is merely an example, and it is understood that various modifications and equivalent other embodiments are possible by those skilled in the art. you will understand Accordingly, the true scope of the present invention should be defined only by the appended claims.

P: powder insulation 10: hull
10a: floor 11: interior space
11a: first area 11b: second area
20: storage tank 30: support means
31: tank support 32: rotation restraint body
40: insulation panel 50: support structure
51: support block 52: support stool
100: dividing wall 110: guide member
120: slide member 130: elastic member
131: first elastic member 132: second elastic member
200: dividing wall 210: lower support member
220: first wall member 230: second wall member
240: connection member 250: auxiliary support member
260: elastic member 300: dividing wall
310: lower support member 320: first wall member
330: second wall member 340: connecting member
350: upper support member 360: first elastic member
370: second elastic member 400: third elastic member
500: dividing wall 510: lower support member
520: first wall member 530: second wall member
540: third wall member 550: coupling portion
600: elastic member 610: first elastic member
620: second elastic member

Claims (9)

delete delete delete a storage tank located inside the hull and accommodating liquefied gas;
a dividing wall dividing the inner space provided between the hull and the storage tank into a first area and a second area;
a powder insulating material filled in the first region to insulate the storage tank; and
Including; a heat insulating panel provided on the outer surface of the storage tank of the second region to insulate the storage tank;
The separation wall is
a lower support member fixedly installed on the hull;
a first wall member having one end supported by the lower support member;
a second wall member interposed between the other end of the first wall member and the storage tank;
a connecting member for binding the first wall member and the second wall member;
an auxiliary support member provided above the lower support member to assist in binding the first wall member and the second wall member; and
Liquefied gas cargo hold comprising; a resilient member interposed between the second wall member and the storage tank. a storage tank located inside the hull and accommodating liquefied gas;
a dividing wall dividing the inner space provided between the hull and the storage tank into a first area and a second area;
a powder insulating material filled in the first region to insulate the storage tank; and
Including; a heat insulating panel provided on the outer surface of the storage tank of the second region to insulate the storage tank;
The separation wall is
a lower support member fixedly installed on the hull;
a first wall member having one end supported by the lower support member;
a second wall member interposed between the other end of the first wall member and the storage tank;
a connecting member for binding the first wall member and the second wall member;
an upper support member fixed to the storage tank and supporting the second wall member;
a first elastic member provided between the hull and the lower support member; and
A liquefied gas cargo hold comprising a second elastic member provided between the second wall member and the upper support member. delete delete delete delete

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