KR102282053B1 - Liquefied gas storage tank and vessel comprising the same - Google Patents

Abstract

The present invention discloses a liquefied gas storage tank comprising a structure for fixing an insulating wall to a hull. The insulating wall fixing structure comprises: a fastening rod which is disposed in a space formed by a plurality of insulating walls constituting the insulating wall and is fixed to the hull through a stud bolt fixed to a first end; and a support member fixed to a second end opposite to the first end of the fastening rod, and respectively corresponding to a plurality of unit heat insulating walls. In this structure, a plurality of unit insulating walls can be fixed to the hull by fastening bolts passing through each support member pressing each unit insulating wall.

Description

Liquefied gas storage tank and vessel comprising the same

The present invention relates to a liquefied gas storage tank and a vessel having the same, and more particularly, to a liquefied gas storage tank configured to fix an insulating wall to a hull outside the insulating wall and a vessel having the same.

According to recent technology development, liquefied gas such as liquefied natural gas (LNG) and liquefied petroleum gas (LPG) is widely used to replace gasoline or diesel.

Liquefied natural gas is liquefied by cooling and liquefying methane obtained by refining natural gas collected from a gas field. It is a colorless and transparent liquid with few pollutants and high calorific value. On the other hand, liquefied petroleum gas is a fuel made into a liquid by compressing a gas containing _{propane (C 3} H ₈ ) and butane (C ₄ H _{10 ) as main components together with petroleum from oil fields at room temperature.} Liquefied petroleum gas, like liquefied natural gas, is colorless and odorless and is widely used as fuel for household, business, industrial, and automobile use.

Such liquefied gas is stored in a liquefied gas storage tank installed on the ground or stored in a liquefied gas storage tank provided in a transportation means sailing the ocean, and the liquefied natural gas is reduced to 1/600 of the volume by liquefaction, Liquefied petroleum gas has the advantage of high storage efficiency because propane is reduced to 1/260 by volume and butane to 1/230 by liquefaction.

For example, liquefied natural gas (LNG) is obtained by cooling natural gas to a cryogenic temperature (about -163℃), and its volume is reduced to about 1/600 compared to that of natural gas in gaseous state, so it is suitable for long-distance transportation by sea. Very suitable.

An LNG carrier for loading and unloading LNG to an onshore customer by operating the sea, or an LNG RV (Regasification Vessel) that loads LNG and operates the sea to arrive at an onshore demand, then regasifies the stored LNG and unloads it into natural gas , LNG FPSO (Floating, Production, Storage and Offloading), which is used to liquefy and store the produced natural gas directly at sea and transfer the stored LNG to an LNG carrier when necessary. An LNG FSRU (Floating Storage and Regasification Unit) that vaporizes LNG and supplies it to onshore consumers as needed later includes a storage tank (referred to as a "cargo hold") capable of withstanding the cryogenic temperature of LNG.

As described above, a storage tank for storing LNG in a cryogenic liquid state is installed in offshore structures such as LNG carriers, LNG RVs, LNG FPSOs, and LNG FSRUs that transport or store liquefied gas such as LNG at sea.

Such a storage tank may be classified into an independent type and a membrane type depending on whether the load of the cargo acts directly on the insulation material. In general, the membranous storage tank is divided into NO 96 type and Mark Ⅲ type, and the independent storage tank is divided into MOSS type and IHI-SPB type.

In general, among the membranous storage tanks, the Mark III type liquefied gas storage tank includes a primary barrier made of a stainless steel membrane corrugation barrier (or a corrugation barrier), and a triplex composite material A secondary barrier consisting of In addition, a primary insulating wall is installed between the primary barrier and the secondary barrier, and a secondary insulating wall is installed between the secondary barrier and the hull.

The primary insulating wall is constructed by bonding primary plywood to the upper surface of the primary insulating panel made of polyurethane foam (R-PUF). In addition, the secondary insulation wall is a secondary plywood bonded to the lower surface of the secondary insulation panel made of the same polyurethane foam as the primary insulation wall. The secondary insulation wall is supported on the hull by mastic and fixed to the hull by stud bolts.

This Mark Ⅲ type liquefied gas storage tank has excellent thermal insulation properties by using polyurethane foam as an insulator of the primary and secondary insulation panels constituting the primary and secondary insulation walls, thereby reducing the thickness of the entire insulation wall to NO 96. It can be configured thinner than the type, and accordingly, the internal volume of the liquefied gas storage tank is increased.

In the liquefied gas storage tank, boil off gas (BOG) is generated by heat intrusion from the outside, and it is liquefied by lowering the natural vaporization rate (BOR), which is the vaporization ratio of the boil-off gas through an adiabatic design. It is a key technology in the design of gas storage tanks.

In addition, since the liquefied gas storage tank is exposed to various loads such as sloshing, it is also essential to secure the mechanical strength of the insulation panel.

Considering this point, "Mark Ⅲ type liquefied gas storage tank using polyurethane foam with excellent mechanical strength and excellent thermal insulation performance as the insulation material of the primary and secondary insulation panels can be considered suitable.

The present invention has a structure in which the insulating wall (secondary insulating wall) constituting the liquefied gas storage tank described above is fixed to the hull from the outside of the insulating wall, and thus it is possible to prevent damage to the insulating wall while maintaining the insulating performance of the insulating wall It provides a liquefied gas storage tank having a liquefied gas storage tank and a ship having the same.

The liquefied gas storage tank according to the present invention for realizing the above object includes a heat-insulating wall fixing structure for fixing the heat-insulating wall to the hull, and the heat-insulating wall fixing structure is located in a space formed by a plurality of heat-insulating walls constituting the heat-insulating wall. a fastening rod fixed to the hull through a stud bolt fixed to the first end; and a support member fixed to a second end opposite to the first end of the fastening rod and respectively corresponding to a plurality of unit heat insulating walls. In this structure, a plurality of unit insulating walls can be fixed to the hull by the fastening bolts passing through each supporting member pressing each unit insulating wall.

Each of the plurality of support members extends from the second end of the fastening rod toward the corresponding unit insulating wall, and a through hole through which the fastening bolt can pass is formed in a predetermined area.

Each of the plurality of support members preferably extends in a horizontal state with the hull, and the through-hole of each support member has a spiral portion formed on its inner circumferential surface, so that the respective support members and the fastening bolt are screwed together and the corresponding unit by the fastening bolt at the same time. Pressurization against the insulating wall can be made.

Each of the plurality of unit insulating walls includes a supporting pad attached to a region corresponding to each supporting member, so that the fastening bolt can press the supporting pad without directly contacting the unit insulating wall. Here, the support pad is preferably made of an elastic material.

On the other hand, the wedge is fixed to the surface of the hull corresponding to the space formed between the plurality of unit insulation walls, and the stud bolt is fixed to the hull in a state that the wedge is penetrated.

In the liquefied gas storage tank according to the present invention as described above, the insulating wall fixing structure is disposed on the outside of the unit insulating wall so that the unit insulating wall can be fixed to the hull, thus preventing damage to the unit insulating wall including the insulating panel It is possible to maintain the insulating function of the insulating wall.

1A is a schematic view showing a position in which an insulating wall fixing structure is disposed in a liquefied gas storage tank according to a first embodiment of the present invention.
FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A , and for the sake of convenience, the unit insulation wall on the left is not shown.
Figure 2a is a schematic view showing a position in which the insulating wall fixing structure is arranged in the liquefied gas storage tank according to the second embodiment of the present invention.
FIG. 2B is a cross-sectional view taken along line AA of FIG. 2A, and shows only two unit insulation walls for convenience.
3A is a schematic view showing a position in which the insulating wall fixing structure is disposed in a liquefied gas storage tank according to a third embodiment of the present invention.
FIG. 3B is a cross-sectional view taken along line AA of FIG. 3A , and for convenience, only a single unit insulating wall is shown.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In the present specification, in adding reference numbers to the components of each drawing, it should be noted that only the same components are given the same number as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, in this specification, liquefied gas may be used to encompass all gas fuels that are generally stored in a liquid state, such as LNG or LPG, ethylene, ammonia, etc. can be expressed as This can be applied to boil-off gas as well. In addition, for convenience, LNG may be used to encompass both NG (Natural Gas) in liquid state as well as LNG in supercritical state, etc., and boil-off gas is used to mean including liquefied boil-off gas as well as gaseous boil-off gas. can

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1A is a view showing a position where the insulating wall fixing structure is applied in the liquefied gas storage tank according to the first embodiment of the present invention, and constitutes an insulating wall mounted on the hull forming the exterior of the storage tank in the ship. The positions of the four unit insulating walls 10 adjacent to each other and the insulating wall fixing structure 100 thereto are schematically shown among a plurality of unit insulating walls. In the present embodiment, it is noted that the concept encompasses offshore structures that float at a certain point on the sea and perform a specific operation in addition to a merchant vessel that transports cargo from a departure point to a destination.

On the other hand, a plurality of unit insulation walls 10 shown in Figure 1a constitutes a secondary insulation wall constituting the liquefied gas storage tank, is a member directly fixed to the hull.

The secondary insulating wall is designed to withstand the shock from the outside or the liquefied gas sloshing inside the storage tank while blocking heat intrusion from the outside together with the primary insulating wall (not shown). The secondary insulation wall is installed between the secondary barrier (not shown) and the hull, and may include a secondary insulation panel, a secondary plywood, and an insulation shield. Meanwhile, in this specification, detailed descriptions of the detailed configuration (components) and functions of the secondary insulating wall (and each unit insulating wall) are omitted.

As shown in FIG. 1A , the heat-insulating wall fixing structure 100 according to the present embodiment is disposed between two adjacent unit heat-insulating walls 10 , and the unit heat-insulating wall 10 is formed by the heat-insulating wall fixing structure 100 . ) is fixed to the hull.

FIG. 1B is a cross-sectional view taken along the line A-A of FIG. 1A , and shows the structure of the insulating wall fixing structure 100 and the relationship with the unit insulating wall 10 . Here, in FIG. 1B , the unit insulating wall positioned on the left side of the insulating wall fixing structure 100 is not shown.

Also, as mentioned above, the (secondary) insulating wall, that is, the unit insulating wall 10 of FIG. 1A may be composed of an insulating panel, a plywood and an insulating shield, but in FIG. 1B, these components are not separated for convenience. and the unit insulation wall 10 is shown as a single block.

Meanwhile, hereinafter, for convenience, a surface corresponding to the hull (1: or a structure installed on the hull) of the unit heat insulation wall 10 is referred to as a first surface, and a surface opposite to the first surface is referred to as a second surface.

In this embodiment, the insulating wall fixing structure 100 is a fastening rod 110, a stud bolt fixed to the first end of the fastening rod 110 (the lower end in FIG. 1B, the end corresponding to the hull 1) ( 120), and a support member 130 fixed to the second end of the fastening rod 110 (the opposite end of the first end, the upper end in FIG. 1B).

The fastening rod 110 is a member having a predetermined length, and corresponds to the overall height of the side of the unit heat insulating wall 10 . A stud bolt 120 is fixed to a first end of the fastening rod 110 , and a support member 130 is fixed to a second end of the fastening rod 110 .

The support member 130 extends from the second end of the fastening rod 110 toward the corresponding unit thermal insulation wall 10, and preferably extends to be horizontal with the hull 1, and a fastening bolt to be described later in a predetermined area. A through hole through which 140 can pass is formed. At this time, preferably, a spiral portion is formed on the inner circumferential surface of the through hole, so that the support member 130 and the fastening bolt 140 are screwed together.

On the other hand, a support pad 150 is attached (or fixed) to the second surface of the unit insulation wall 10 corresponding to the insulation wall fixing structure 100 , and the support pad 150 is the support member 130 . ) corresponds to

In addition, a wedge 160 is fixed to the first surface of the unit heat insulation wall 10 . The wedge 160 extends from the unit insulation wall 10 to correspond to the stud bolt 120 , and a through hole through which the stud bolt 120 can pass is formed in a predetermined area. The wedge 160 can adjust the installation height of the unit insulation wall 10 .

The support pad 150 mounted on the second side of the unit insulating wall 10 is preferably made of an elastic material (eg Teflon), and a wedge extending from the first side of the unit insulating wall 10 . 160 is made of wood. However, these materials are exemplary, and are not limited thereto as long as they do not damage the unit insulating wall 10 . The unit insulation wall 10 may be installed in height through the wedge 160 .

A process of fixedly mounting the unit insulation wall 10 to the hull 1 using the insulation wall fixing structure 100 having such a structure will be described with reference to FIGS. 1A and 1B .

First, two unit heat insulation walls 10 are arranged on the surface of the hull 1 in a state in which a predetermined distance is maintained. At this time, a wedge 160 fixed to the insulating wall 10 is positioned between the first surface of the insulating wall 10 and the hull 1 .

In this state, the stud bolt 120 is fixed to the hull 1 in a state penetrating the wedge 160 , and then the fastening rod 110 of the insulating wall fixing structure 100 is fixed with the stud bolt 120 . . Here, the fastening rod 110 and the stud bolt 120 may be coupled and fixed to each other through various methods, for example, welding or screw coupling, and the fixing process of the stud bolt 120 and the fastening rod 110 is this It is a technique known in the technical field, and thus a description thereof will be omitted.

The support member 130 extending from the fastening rod 110 fixed to the stud bolt 120 corresponds to the support pad 150 attached to the second surface of the unit heat insulating wall 10, and in this state, the fastening bolt ( The support pad 150 attached to the unit heat insulating wall 10 is pressed while the 140 is screwed with the through hole formed in the support member 130 .

As a result, the unit insulation wall 10 is pressed toward the hull 1 by the insulation wall fixing structure 100 , the fastening bolts 140 and the support pad 150 . In this way, the fastening bolt 140 presses the unit thermal insulation wall 10 through the support pad 150 without directly contacting the unit thermal insulation wall 10 , thus preventing damage to the unit thermal insulation wall 10 . .

On the other hand, the arrangement position and number of the insulating wall fixing structure 100 is not limited to that shown in FIG. 1A. That is, FIGS. 1A and 1B show that one insulating wall fixing structure 100 corresponds to a single unit insulating wall 10 for convenience, but the rigid fixing of the unit insulating wall 10 to the hull 1 is provided. To this end, a single unit insulating wall 10 may be fixed to the hull 1 by a plurality of insulating wall fixing structures 100 .

In addition, although FIG. 1A shows a state in which the heat insulating wall fixing structure 100 is disposed at the corner of each unit heat insulating wall 10 , it is of course also possible to be disposed at the side of each unit heat insulating wall 10 .

A second embodiment of the present invention will be described with reference to FIGS. 2A and 2B. Meanwhile, in FIGS. 2A and 2B for the second embodiment, the same reference numerals are given to the same or similar components as those shown in FIGS. 1A and 1B for the first embodiment.

Figure 2a is a view showing a position in which the insulating wall fixing structure is applied in the liquefied gas storage tank according to the second embodiment of the present invention, it constitutes an insulating wall (second insulating wall) mounted on the hull 1 Among a plurality of unit insulating walls, the positions of four unit insulating walls 10 adjacent to each other and a single insulating wall fixing structure 100 therefor are schematically shown.

As shown in FIG. 2A , the heat-insulating wall fixing structure 100 in this embodiment is disposed between four adjacent unit heat-insulating walls 10 , and the unit heat-insulating wall 10 by the heat-insulating wall fixing structure 100 . ) is fixed to the hull (1).

FIG. 2B is a cross-sectional view taken along line A-A of FIG. 2A , and shows the structure of the insulating wall fixing structure 100 and the relationship with the unit insulating wall 10 . Here, in FIG. 2B , only two unit insulating walls 10 and the insulating wall fixing structure 100 arranged diagonally among the four unit insulating walls 10 shown in FIG. 2A are shown.

Here, as mentioned above, the (secondary) insulating wall, that is, the unit insulating wall 10 of FIG. 2 may be composed of an insulating panel, a plywood, and an insulating shield, but in FIG. 2B, these components are not separated for convenience. and the unit thermal insulation wall 10 is shown as a single block.

Meanwhile, hereinafter, for convenience, a surface corresponding to the hull (1: or a structure installed on the hull) of the unit heat insulation wall 10 is referred to as a first surface, and a surface opposite to the first surface is referred to as a second surface.

In the second embodiment of the present invention, the insulating wall fixing structure 100 is fixed to the fastening rod 110 , the first end of the fastening rod 110 (the lower end in FIG. 2B , the end corresponding to the hull 1 ). The stud bolt 120 and a plurality of, preferably four, support members 130 fixed to the second end of the fastening rod 110 are included.

The fastening rod 110 is a member having a predetermined length, and corresponds to the overall height of the side of the unit heat insulating wall 10 . A stud bolt 120 is fixed to a first end of the fastening rod 110 , and a plurality of support members 130 are fixed to a second end opposite to the first end.

Each support member 130 extends from the second end of the fastening rod 110 toward the corresponding unit thermal insulation wall 10 , preferably horizontally with the hull 1 . That is, the four support members 130 are fixed to the fastening rod 110 , and the four support members 130 extend on the second surface of the adjacent four unit heat insulating walls 10 , respectively.

A through hole through which the fastening bolt 140 can pass is formed in a predetermined region of each support member 130 . At this time, preferably, a spiral portion is formed on the inner circumferential surface of the through hole, so that the support member 130 and the fastening bolt 140 are screwed together.

On the other hand, the support pad 150 is attached (or fixed) to the second surface (the uppermost surface in FIG. 2B) of the unit insulation wall 10 corresponding to the insulation wall fixing structure 100, and the hull 1 ) and the corresponding first surface (the lowermost surface in FIG. 2B ), the wedge 160 is fixed. The support pad 150 corresponds to the support member 130 , and the wedge 160 extends from the unit insulating wall 10 to correspond to the stud bolt 120 . Here, a through hole through which the stud bolt 120 can pass is formed in the wedge 160 .

On the other hand, the wedge 160 is extended and fixed to the first surface of the four adjacent unit heat insulating walls 10, and the stud bolt 120 is penetrated in the central portion thereof.

The support pad 150 attached to the unit insulating wall 10 is preferably made of an elastic material (eg, Teflon), and the wedge 160 is made of wood. However, these materials are exemplary and are not limited thereto as long as they do not damage the unit insulating wall 10 .

A process of fixedly mounting a plurality of unit heat insulating walls 10 to the hull 1 using the heat insulating wall fixing structure 100 having such a structure will be described with reference to FIGS. 2A and 2B .

First, a wedge 160 is positioned on the surface of the hull 1 on which the four unit heat insulating walls 10 are to be arranged. The area in which the wedge 160 is located corresponds to the space formed by the corner portions of the installed four unit heat insulating walls 10 .

Thereafter, the stud bolt 120 is fixed to the hull 1 in a state where the wedge 160 penetrates. Here, the stud bolt 120 is fixed to the hull 1 through welding or screw coupling, and the process of fixing the stud bolt to the hull is known in the art, and a description thereof will be omitted.

In this state, the fastening rod 110 of the insulating wall fixing structure 100 is fixed with the stud bolt 120 . Here, the fastening rod 110, the stud bolt 120 may be coupled and fixed to each other through various methods, for example, welding or screw coupling, and the fixing process of the stud bolt 120 and the fastening rod 110 is also seen. It is a technique known in the technical field, and thus a description thereof will be omitted.

After fixing the fastening rod 110 to the stud bolt 120 , as shown in FIG. 2A , the fastening rod 110 is a plurality of unit insulating walls 10 , for example, the corners of four unit insulating walls 10 . Four unit heat insulating walls 10 are arranged around the fastening rod 110 at predetermined intervals so as to be located in the space formed by the parts (ie, the area where the wedge 160 is located).

At this time, here, the corner portions of the four unit heat insulating walls 10 correspond to the wedges 160 , and the four support members 130 of the heat insulating wall fixing structure 100 are the second side of the four unit heat insulating walls 10 . It corresponds to each of the support pads 150 attached to the .

Additionally, a leveling pad 170 may be installed between each unit insulating wall 10 and the wedge 160 , and the leveling pad is a plurality of unit insulating walls corresponding to a single insulating wall fixing structure 100 . (10) is to maintain the horizontal state.

Thereafter, the fastening bolt 140 is screwed with the through hole formed in each support member 130 and simultaneously presses the support pad 150 fixed to each unit heat insulating wall 10, and as a result, each unit heat insulating wall ( 10) is pressed toward the hull 1 by the insulating wall fixing structure 100, the fastening bolts 140 and the support pads 150. In this process, the fastening bolt 140 presses the unit insulation wall 10 through the support pad 150 without direct contact with the unit insulation wall 10 , and as a result, the unit insulation wall fixed to the hull 1 . (10), in particular, it can prevent damage to the insulation panel.

Although the structure in which the insulating wall fixing structure 100 is installed at any one corner of each unit insulating wall 10 is shown in FIG. 2A , all corner parts (hexahedron) for firm fixing of each unit insulating wall 10 are shown. In the case of a structure, an insulating wall fixing structure may be installed at four corners).

A third embodiment of the present invention will be described with reference to Figs. 3A and 3B. Meanwhile, in FIGS. 3A and 3B of the third embodiment, the same reference numerals are assigned to the same or similar components as those shown in FIGS. 1A ( 2A ) and 1B ( FIG. 2B ).

3A is a schematic view showing a position where the insulating wall fixing structure is applied in the liquefied gas storage tank, according to the third embodiment of the present invention, in the hull 1 (forming the exterior of the storage tank); The position of the insulating wall fixing structure 100 with respect to four unit insulating walls 10 adjacent to each other among a plurality of unit insulating walls constituting the mounted insulating wall (second insulating wall) is schematically shown.

As shown in FIG. 3A , the insulating wall fixing structure 100 according to the present embodiment is disposed on the side of each unit insulating wall 10 , and the unit insulating wall 10 by the insulating wall fixing structure 100 is It is fixed to the hull (1).

FIG. 3B is a cross-sectional view taken along line A-A of FIG. 3A , and shows the relationship between the structure of the insulating wall fixing structure 100 and the unit insulating wall 10 . Here, in FIG. 3B , only the right unit heat insulating wall 10 and the heat insulating wall fixing structure 100 are shown among the two unit heat insulating walls 10 located on both sides of the heat insulating wall fixing structure 100 .

For convenience, hereinafter, a surface corresponding to the hull (1: or a structure installed on the hull) of the unit heat insulation wall 10 is referred to as a first surface, and a surface opposite to the first surface is referred to as a second surface.

In this embodiment, the insulating wall fixing structure 100 includes a stud bolt 120 and a wedge 160 supporting the stud bolt 120 .

As mentioned above, the (secondary) thermal insulation wall, that is, the unit thermal insulation wall 10 in FIG. 2 is connected to the thermal insulation panel 11 and the first surface (the surface corresponding to the hull 1) of the thermal insulation panel 11 . It includes an attached plywood 12, a portion of which is extended outwardly, ie towards the neighboring unit insulating wall (and unit insulating wall fixing structure 100). (12-1).

Hereinafter, the extension 12-1 is described as a portion of the plywood 12 extending outward, but the present embodiment is not limited thereto, and the lower side of the unit heat insulation wall 10 or the plywood 12 It may be an extension member that is separately attached and fixed to the side of the , and the extension member may include that formed of a composite material such as FRP as well as plywood.

A wedge 160 is positioned between the extension 12-1 of the plywood 12 and the surface of the hull 1, and the stud bolt 120 passes through the extension 12-1 and the wedge 160. Corresponds to the hull (1) in one state.

A process of fixedly mounting the unit insulation wall 10 to the hull 1 using the insulation wall fixing structure 100 having such a structure will be described with reference to FIGS. 3A and 3B .

First, a wedge 160 is positioned on the surface of the hull 1 on which the unit thermal insulation wall 10 is to be disposed, and the wedge 160 is an extension of the plywood 12 constituting the unit thermal insulation wall 10 ( 12-1).

In this state, thereafter, the stud bolt 120 passes through the extension 12-1 and the wedge 160 of the plywood 12, and is then fixed to the hull 1 . Here, the stud bolt 120 is fixed to the hull 1 through welding or screw coupling, and the process of fixing the stud bolt 120 to the hull is known in the art, and a description thereof will be omitted.

As a result, the unit thermal insulation wall 10 penetrates the extension 12-1 of the plywood extending from the unit thermal insulation wall 10 and the wedge 160 disposed outside the unit thermal insulation wall 10 to form the hull 1 ) is fixed to the hull 1 by the stud bolts 120 fixed to the hull 1 and consequently the unit insulation wall 10, in particular, damage to the insulation panel, for example, the formation of a through hole for the penetration of the stud bolt can be prevented. there is.

On the other hand, the arrangement position and number of the insulating wall fixing structure 100 is not limited to that shown in FIG. 3A. That is, although FIGS. 3A and 3B show that two insulating wall fixing structures 100 correspond to one corner of a single unit insulating wall 10 for convenience, the unit insulating wall 10 to the hull 1 is The insulating wall fixing structure 100 may be installed correspondingly to each side of the single unit insulating wall 10 in order to firmly fix the insulated wall 10 .

Although the present invention has been described in detail through specific examples, this is for the purpose of describing the present invention in detail, and the present invention is not limited thereto, and by those of ordinary skill in the art within the technical spirit of the present invention. It will be clear that the transformation or improvement is possible.

All simple modifications and variations of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

1: hull 10: unit insulation wall
12: plywood 100: insulation wall fixing structure
110: fastening rod 120: stud bolt
130: support member 140: fastening bolt
150: support pad 160: wedge
170: leveling pad

Claims (9)

In the liquefied gas storage tank comprising an insulating wall fixing structure for fixing the insulating wall to the hull,
The insulating wall fixing structure,
a fastening rod disposed in a space formed by a plurality of unit insulating walls constituting the insulating wall and fixed to the hull through a stud bolt fixed to a first end; and
and a support member fixed to a second end opposite to the first end of the fastening rod and respectively corresponding to the plurality of unit heat insulating walls,
A fastening bolt passing through each support member presses each unit insulation wall to fix each unit insulation wall to the hull,
The plurality of unit insulation walls,
It is arranged in a state of maintaining a predetermined distance to constitute the insulating wall,
The stud bolt is
The four unit insulating walls adjacent to each other are fixed to the hull exposed between the facing corners without interference with the unit insulating wall,
The fastening rod,
It is fixed by the stud bolts and extends directly above the corners of each of the four unit insulating walls higher than the upper surface of the unit insulating walls,
The support member is
A liquefied gas storage tank, extending towards each of the four unit insulating walls. The liquefied gas according to claim 1, wherein each of the supporting members extends from the second end of the fastening rod toward the corresponding unit insulating wall, and a through hole through which the fastening bolt can pass is formed in a predetermined area. storage tank. The liquefied gas storage tank according to claim 2, wherein each of the supporting members extends in a horizontal state with the hull. The method according to claim 2, wherein the through-hole of each support member has a spiral portion formed on its inner circumferential surface, so that, at the same time as screwing the respective support members and the fastening bolts, the fastening bolts are pressed against the corresponding unit insulating wall by the fastening bolts. liquefied gas storage tank. The liquefied gas storage tank according to claim 1, wherein each of the unit heat insulating walls includes a support pad fixed to a region corresponding to the support member, and the fastening bolt presses the support pad. The liquefied gas storage tank according to claim 5, wherein the support pad is made of an elastic material. The liquefied gas storage tank according to claim 1, wherein a wedge is fixed to the surface of the hull corresponding to the space formed between the plurality of unit insulating walls, and the stud bolt is fixed to the hull in a state where the wedge is penetrated. . The liquefied gas storage tank according to claim 7, wherein the wedge adjusts the installation height of the unit insulating wall. A ship having a liquefied gas storage tank according to any one of claims 1 to 8.

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