KR20200092820A - Insulation System of Liquefied Gas Hold - Google Patents

Abstract

Disclosed is an insulation system for a liquefied gas cargo hold. More specifically, the present invention provides a structure for an insulation layer of a corner part of a cargo hold, which is provided for providing the new type insulation system for a liquefied gas cargo hold different from the prior art. In the insulation system for a liquefied gas cargo hold, a first sealing wall comprises a corrugation membrane in a stainless steel (SUS) material and a second sealing wall comprises a flat membrane in an invar material so that insulation performance can be remarkably improved.

Description

Insulation System of Liquefied Gas Hold {Insulation System of Liquefied Gas Hold}

The present invention relates to a thermal insulation system for a liquefied gas cargo hold, and more specifically, to construct a membrane type thermal insulation system for a cargo hold of a liquefied gas carrier or a liquefied gas fuel container, the primary and secondary metal membranes usable at cryogenic temperatures. An insulating system for a liquefied gas cargo hold having a double barrier structure used as a sealing wall.

Natural gas is transported in gaseous form through on-shore or offshore gas piping, or transported to remote consumers while stored on LNG carriers in the form of liquefied natural gas (LNG). LNG is obtained by cooling natural gas to a very low temperature (approximately -163°C), and its volume is reduced to approximately 1/600 compared to natural gas in a gas state, so it is very suitable for long-distance transportation through sea.

A storage tank (commonly referred to as a'cargo') is installed in a structure for transporting or storing LNG, such as an LNG carrier for loading and unloading LNG to land-based destinations by carrying LNG.

Cargo holds can be classified into independent tank type and membrane type depending on whether the load of the cargo directly acts on the insulation. Normally, the membrane type is divided into GTT's NO 96 type and MARK III type, and the independent tank type is divided into MOSS type and IHI-SPB type.

1 is a side sectional view showing a thermal insulation system for a corner of a conventional NO 96 type cargo hold.

Referring to FIG. 1, a conventional NO 96 type cargo hold comprises a primary sealing wall 40 and a secondary sealing wall 20 made of 0.5 to 0.7 mm thick Invar (36% nickel steel) membrane, and a plywood box It includes a primary insulating layer 30 and a secondary insulating layer 10 provided in the form of an insulation box filled with insulating materials such as perlite powder.

In the NO 96 type cargo hold, the primary sealing wall 40 and the secondary sealing wall 20 have almost the same degree of liquid tightness and strength, and when the primary sealing wall 40 leaks, the secondary sealing wall for a considerable period of time (20) alone can safely support the cargo.

In addition, since the NO 96-type cargo hold has a heat-insulating layer (30, 10) filled with insulation inside the wooden box, it can have higher compressive strength and stiffness than the MARK Ⅲ-type hold and is easy to weld and has a high automation rate.

On the other hand, an invar tube (50) having a lattice structure is installed in the transverse corner of the NO 96 type cargo hold, and the primary and secondary sealing walls (40, 20) are welded to the invar tube (50). Connected.

Conventional NO 96 type cargo holds, various loads applied to the primary and secondary sealing walls 40 and 20 (for example, thermal deformation when shipping or unloading liquefied liquefied natural gas, weight of liquefied natural gas received, It is a structure in which the load caused by the sloshing phenomenon of liquefied natural gas) is transferred to the hull H by the invar tube 50.

A plurality of heat insulation boxes 51 for supporting the structure of the invar tube 50 are disposed between the inside of the invar tube 50 provided in a lattice shape and between the invar tube 50 and the hull H.

Technical problem to be achieved by the present invention, the primary sealing wall is a stainless steel (SUS) material corrugated membrane (corrugation membrane), the secondary sealing wall is composed of an Invar (Invar) material consisting of a flat membrane (flat membrane) It provides a new type of liquefied gas cargo hold insulation system that is different from the conventional one, and for the easy construction of such a thermal insulation system, a transverse corner and a longitudinal direction of the inner surface of a liquefied gas carrier or liquefied gas fuel container are provided. It is intended to materialize the structure of the heat insulating layer disposed at the corner (longitudinal corner).

In order to achieve the above object, the present invention is a secondary insulating layer disposed on the inner wall of the hull, a secondary sealing wall made of a metal membrane installed on top of the secondary insulating layer, and disposed on the secondary sealing wall In the liquefied gas cargo hold of a double barrier structure including a primary insulating layer to be formed on top of the primary insulating layer, and a primary sealing wall made of a metal membrane, the secondary insulating layer is the liquefied gas cargo hold Consists of a secondary lunge corner box installed along the longitudinal corner portion of the second secondary insulation panel disposed in an area excluding the secondary lunge corner box, the primary thermal insulation layer, the longitudinal corner portion of the liquefied gas cargo hold Consists of a primary lunge corner block installed along with a primary insulation panel disposed in an area excluding the primary lunge corner block, wherein the secondary lunge corner box is pearlite inside a box of plywood or fiber reinforced plastic material. It is provided in the form of a box filled with powder or glass wool, and the primary longe corner block is provided in the form of a sandwich panel in which a glass fiber-reinforced polyurethane foam and a plywood or fiber-reinforced plastic are combined, or as a single plywood block. Is provided, the primary longe corner block, characterized in that the outer wall surface bent at an angle corresponding to the chamfer surface formed inclined in the longitudinal corner portion of the cargo hold is supported by the secondary longe corner box, liquefaction Provides an insulation system for gas cargo holds.

The present invention is installed on the upper portion of the secondary lodge corner box, the end of the secondary sealing wall sealed connection by welding is connected to the lunge; And a lodge connection plate which is installed on an upper portion of the primary lodge corner block and the end of the primary sealing wall is sealed and connected by welding. The lodge connection is provided of Invar material. , The lodge connection plate is characterized by being made of stainless steel (SUS) or Invar (Invar) material.

The primary insulation panel and the secondary insulation panel may be provided in the form of a sandwich panel in which glass fiber reinforced polyurethane foam and plywood or fiber reinforced plastic are combined.

The primary insulation panel may be a sandwich panel in which a protective plate made of plywood or fiber-reinforced plastic is adhered to both the upper and lower surfaces or the upper and lower surfaces of a glass fiber reinforced polyurethane foam.

The secondary sealing wall is made of a flat invar membrane of a flat shape, and the primary sealing wall is a stainless steel membrane (SUS membrane) in which a number of wrinkles are formed to absorb shrinkage due to cryogenic temperature. It can be done.

The present invention further includes a corrugated finishing member connecting the primary sealing wall and the lodge connecting plate, wherein the corrugated finishing member is made of the Invar material of the cargo hold, and is raised in the inner direction of the cargo hold. It may include wrinkles extending along the longitudinal direction of the cargo hold.

Liquefied gas cargo hold according to the present invention, since the primary sealing wall is made of a corrugated stainless steel (SUS) membrane, the primary insulating layer supporting the primary sealing wall can be configured as a panel-shaped insulating layer instead of a box structure. , This has the effect of improving the thermal insulation performance.

In addition, the present invention can be partially reinforced using a glass fiber-reinforced polyurethane foam or plywood laminated block having high strength according to the strength required for the insulation system, and applying the concept of the same arrangement as described above to apply the insulation layer Steps that can occur at the boundary of can be minimized.

1 is a side sectional view showing a thermal insulation system of a corner of a conventional NO 96 type cargo hold
Figure 2 is a perspective view showing the appearance of the liquefied gas cargo hold according to the present invention
Figure 3 is a cross-sectional side view showing a lateral corner insulation system of a liquefied gas cargo hold according to the present invention
Figure 4 is an interior perspective view showing a transverse corner portion insulation system of a liquefied gas cargo hold according to the present invention
Figure 5 is a side cross-sectional view showing that the primary trans-corner block according to the present invention is provided in a vertical type (perpendicular type)
Figure 6 is a side cross-sectional view showing that the primary transformer corner block according to the present invention is provided in a round type (round type)
7 is a side cross-sectional view showing that the primary trans corner block according to the present invention is provided in a multi-line type
Figure 8 is a cross-sectional side view showing an embodiment of a longitudinal corner portion insulation system of a liquefied gas cargo hold according to the present invention
9 is an interior perspective view showing an embodiment of a thermal insulation system in a longitudinal corner of a liquefied gas cargo hold according to the present invention
Figure 10 is a cross-sectional side view showing another embodiment of the thermal insulation system in the longitudinal corner of the liquefied gas cargo hold according to the present invention
Figure 11 is an interior perspective view showing another embodiment of the thermal insulation system in the longitudinal corner of the liquefied gas cargo hold according to the present invention
12 is a side cross-sectional view showing that the primary lodge corner block according to the present invention is provided in an obtuse angle type
Figure 13 is a side cross-sectional view showing that the primary longe corner block according to the present invention is provided in a round type (round type)
14 is a cross-sectional side view showing that the primary lodge corner block according to the present invention is provided in a multi-line type

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the contents described in the accompanying drawings, which illustrate preferred embodiments of the present invention.

Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the present invention with reference to the accompanying drawings. The same reference numerals in each drawing denote the same members.

In the present invention, the use of the terms'primary' and'secondary' is based on the LNG stored in the cargo hold, whether it functions to primarily seal or insulate LNG, or to function to seal or insulate secondaryly. It was used as a criterion for Korean classification.

In addition, by convention, the term'upper' or'up' applied to the elements of the tank refers to the direction toward the inside of the tank, regardless of the direction to gravity, and likewise, the term'lower' or'down' refers to gravity It refers to the direction toward the outside of the tank regardless of the direction.

Figure 2 is a perspective view showing the appearance of a liquefied gas cargo hold according to the present invention.

Referring to Figure 2, the liquefied gas cargo hold according to the present invention, in order to reduce the sloshing load of the liquefied gas stored therein, in particular, the sloshing load in the left and right directions at an angle of approximately 135° to the upper and lower sides of the cargo hold It is shown that an inclined chamfer is formed.

Figure 3 is a cross-sectional side view showing a lateral corner insulation system of a liquefied gas cargo hold according to the present invention, and Figure 4 is an internal perspective view showing a lateral corner insulation system of a liquefied gas cargo hold according to the present invention, Figure 5 is the present invention A side cross-sectional view showing that the primary trans corner block according to the present invention is provided in a vertical type (perpendicular type), FIG. 6 is a side cross-sectional view showing that the primary trans corner block according to the present invention is provided in a round type (round type), And Figure 7 is a side cross-sectional view showing that the primary trans-corner block according to the present invention is provided in a multi-line type (multi-line type).

Hereinafter, with reference to FIGS. 3 to 7, an insulation system configured in a transverse corner of a liquefied gas cargo hold according to the present invention will be described.

3 and 4, the liquefied gas cargo hold according to the present invention, the secondary heat insulating layer (100) disposed on the inner wall of the hull (H), the secondary sealing wall installed on top of the secondary heat insulating layer (100) ( 200), a primary barrier layer 300 disposed on the secondary sealing wall 200, and a primary barrier wall 400 installed on top of the primary insulating layer 300, a double barrier (double barrier) sequentially stacked ).

Liquefied gas cargo hold according to the present invention, the inner hull in the transverse corner portion, that is installed along the edges of the front wall and rear wall of the cargo hold, the secondary sealing wall 200 is fixed and supported in the form of a cross (ten) It further includes a transverse connector (500).

Unlike the conventional NO 96-type cargo hold, the invar tube 50 (see FIG. 1) is provided in a lattice structure, and the transverse connector 500 according to the present invention is provided in a single cross-shaped form.

Transverse connecting body 500 is fixed to the wall surface of the hull (H) of the area by a connecting member such as an anchoring bar (anchoring bar), and both ends of the secondary sealing wall 200 extending along the longitudinal direction of the cargo hold The transverse connecting body 500 is hermetically connected by welding.

The transverse connector 500 serves to transmit various loads applied to the secondary sealing wall 200 to the hull H.

The transverse connector 500 is made of an Invar material, and a main member is a plywood or composite material between the transverse connector 500 and the hull H to support it. A secondary transformer corner box 110 in the form of a box is installed.

The secondary trans-corner box 110 may be filled with perlite powder or glass wool in a box made of plywood or composite material, and may be provided in singular or plural. Here, the composite material may be fiber reinforced plastic (GRP).

The secondary insulating layer 100 is installed in the transverse corner portion of the cargo hold as described above to support the transverse connection box 500, the secondary transcorner box 110, and is installed in an area other than the corner portion and reinforced glass fiber Polyurethane foam (R-PUF) and a plywood or a composite material may include a secondary insulation panel 120 in the form of a single or composite panel.

Here, the secondary thermal insulation panel 120 in a composite form is composed of a combination of glass fiber reinforced polyurethane foam (R-PUF) and plywood or a combination of glass fiber reinforced polyurethane foam (R-PUF) and composite material. it means.

More specifically, the secondary insulating panel 120 is a protective plate provided with a plywood or a composite material (for example, fiber-reinforced plastic) on both the upper or lower or upper and lower surfaces of the glass fiber reinforced polyurethane foam (R-PUF). It may be a sandwich panel (sandwich panel) glued.

The secondary insulating panel 120 may be made of a unit panel in the form of a hexahedron or more polyhedron, and a plurality of secondary insulating panels 120 are arranged in the transverse and longitudinal directions on the inner wall of the hull H. The second insulation layer 200 may be formed together with the trans corner box 110.

As described above, when the secondary insulating layer 100 is provided in a structure in which the secondary transcorner box 110 in the form of a box and the secondary insulating panel 120 in the form of a panel are mixed, the secondary transcorner having different rigidity A difference in the degree of heat shrinkage between the box 110 and the secondary insulation panel 120 may cause a height difference between the secondary trans-corner box 110 and the secondary insulation panel 120 during heat shrinkage due to cryogenic temperature.

In order to prevent damage to the metal membrane of the secondary sealing wall 200 installed on the upper portion of the secondary insulating layer 100 due to the height difference generated at the boundary between the insulating layers having different stiffness (insulation box and insulating panel), A method in which the stiffness of the structure disposed in the corner portion of the cargo hold is sequentially reduced may be applied.

Specifically, the rigidity of the secondary insulating panel 120 disposed immediately adjacent to the secondary trans-corner box 110 so as to have intermediate rigidity between the remaining secondary insulating panel 120 and the secondary trans-corner box 110. By arranging, a method such as a gentle slope of the structure disposed at the corner of the cargo hold during heat shrinkage due to cryogenic temperature may be applied.

On the other hand, in the above, the structure in which the secondary transformer corner box 110 in the form of a box in which the secondary insulation layer 100 is disposed in the corner portion and the secondary insulation panel 120 in the form of a panel disposed in an area other than the corner portion are mixed. Although described as a preferred embodiment, the present invention is not limited to this, and it is also possible to configure the secondary insulating layer 100 in the form of an insulating box.

The secondary sealing wall 200 may be formed of a flat invar membrane in a flat shape.

The secondary sealing wall 200 is a secondary insulating layer by continuously welding a plurality of invar strakes having a narrow band shape to a tongue member installed on the secondary insulating panel 120 It may be installed in close contact with the top of (100).

Since the flat invar membrane has a small heat shrinkage coefficient, it is common to apply a flat inbar membrane to a thermal insulation layer supporting a membrane, such as a conventional NO 96 type cargo hold, with a small thermal shrinkage deformation and a high rigidity insulation box.

However, the present invention provides a structure that complements the rigidity of the secondary insulating layer 100 by the transverse connecting member 500 installed in the transverse corner portion of the cargo hold, thereby making the secondary sealing wall 200 flat. This makes it possible to construct a flat in-bar membrane.

That is, according to the present invention, since a part of the load applied to the secondary sealing wall 200 is transferred to the hull H by the transverse connecting member 500 installed in the transverse corner of the cargo hold, the flat invar membrane It is possible to configure the secondary insulating layer 100 to support the secondary sealing wall 200 provided as an insulating panel having weaker stiffness than the insulating box.

In addition, as a component constituting the secondary thermal insulation panel 120 forming the secondary thermal insulation layer 100, a high-density glass having a higher strength and rigidity than a glass fiber-reinforced polyurethane foam (R-PUF) having a density of approximately 130 kg/m ³ The use of fiber-reinforced polyurethane foam (R-PUF) can also be said to function as part of a plan to configure the secondary sealing wall 200 into a flat, flat-in-bar membrane.

The primary insulating layer 300 includes a primary trans-corner block 310 disposed in a transverse corner portion of a cargo hold and a primary insulating panel 320 disposed in an area other than the corner portion.

The primary trans-corner block 310 may be configured as an integral type or a plurality of combinations according to the angle of each wall surface constituting the transverse corner portion of the cargo hold.

In one embodiment, the primary trans-corner block 310 is, as shown in FIGS. 3 to 5, the outer wall surface supported by the transverse connector 500 is bent at 90°, and the primary sealing wall ( 400) may also be provided in a vertical type (perpendicular type) bent at an angle of 90°.

In addition, the primary trans-corner block 310, glass fiber reinforced polyurethane foam (R-PUF) and plywood or composite material (for example, fiber reinforced plastic), as shown in FIG. It may be provided in the form of a single or composite panel, or may be provided in the form of a single plywood block, as shown in FIG. 5(b).

When the primary trans-corner block 310 is provided in the form of a panel, there is an advantage that a step does not occur with the primary insulating panel 320 disposed adjacent to each other when heat shrinking, and the primary trans-corner block 310 is a fly. When provided in the form of a wood block, there is an advantage that deformation due to a sloshing load concentrated locally at a corner of the cargo hold is small.

In addition to the vertical type as described above, the primary trans-corner block 310 is a round type as shown in FIG. 6 or a multi-line type as shown in FIG. 7. It can be provided as either.

At this time, the transformer connection plate 311 provided on the upper portion of the primary trans-corner block 310 may be provided in a shape having the same curvature as the inner wall surface of the primary trans-corner block 310, or a bent shape at the same angle. Can.

Referring back to FIGS. 3 and 4, the primary insulating panel 320 may be made of a hexahedral or more polyhedral unit panel, and a plurality of primary insulating panels 320 on the secondary sealing wall 200. ) Can be arranged in the transverse and longitudinal directions to form the primary insulating layer 300 together with the primary trans corner block 310.

The primary insulation panel 320 is a fixing device provided on the upper portion of the secondary insulation panel 120 in a state where the secondary sealing wall 200 is interposed between the secondary insulation panel 120. By being coupled to it can be fixed in close contact with the upper portion of the secondary sealing wall (200).

The primary sealing wall 400 may be made of a stainless steel (SUS) membrane, and a plurality of corrugated wrinkles may be formed on the upper portion to absorb shrinkage due to cryogenic temperature.

The primary sealing wall 400 may be made of a plurality of stainless steel membrane sheets, and the plurality of stainless steel membrane sheets may be welded to the anchor strip provided on the upper portion of the primary insulating panel 320 without gaps, thereby providing a primary insulating layer. It may be installed in close contact with the top of the (300).

The upper end of the primary trans-corner block 310 may be provided with a trans-connection plate 311 made of stainless steel (SUS) or Invar, and the edge end of the stainless steel membrane sheet disposed in the transverse corner of the cargo hold. By being welded to the trans connecting plate 311, sealing in the transverse corner portion can be achieved.

Wrinkles formed in the open state on the edge of the primary sealing wall 400 may be sealed by a finishing member. The finishing member may be an angle piece formed with a cap for a wrinkle finish on both ends of a metal plate bent at an angle corresponding to the inner surface of the primary trans corner block 310, or an end that seals each wrinkle. It may be an end cap.

Although the drawing shows that the primary sealing wall 400 is made of a non-corss type membrane in which the transverse corrugation and the longitudinal corrugation do not intersect, the primary sealing wall 400 is transverse corrugation and longitudinal Needless to say, the folds may be made of a cross-type membrane having a crossing knot.

Reference numeral 141 is an insulating member disposed with the secondary trans-corner box 110 in an area where the inner walls of the hull (H) constituting the transverse corners of the cargo hold meet each other. An insulating member in the form of a foam or glass wool, which is good and easy to construct, may be arranged.

The thermal insulation system of the liquefied gas cargo hold according to the present invention described above can be applied in a similar manner to the longitudinal corner portion of the cargo hold.

8 is a side cross-sectional view showing an embodiment of a thermal insulation system for a longitudinal corner of a liquefied gas cargo hold according to the present invention, and FIG. 9 is an interior view showing an embodiment of a thermal insulation system for a longitudinal corner of a liquefied gas cargo hold according to the present invention Perspective view, Figure 10 is a side cross-sectional view showing another embodiment of the thermal insulation system of the longitudinal corner of the liquefied gas cargo hold according to the present invention, Figure 11 is another embodiment of the thermal insulation system of the longitudinal corner of the liquefied gas cargo hold according to the present invention Inner perspective view, FIG. 12 is a side cross-sectional view showing that the primary lunge corner block according to the present invention is provided in an obtuse angle type, and FIG. 13 is the primary lunge corner block according to the present invention. type), and FIG. 14 is a side cross-sectional view showing that the primary longe corner block according to the present invention is provided in a multi-line type.

Hereinafter, with reference to FIGS. 8 to 14, an insulation system configured in a longitudinal corner of a liquefied gas cargo hold according to the present invention will be described.

8 and 9, the secondary insulating layer 100 of the liquefied gas cargo hold according to the present invention, a secondary lodge corner box 130 installed along the inner hull at the longitudinal corner portion of the cargo hold, and a corner It includes a secondary insulating panel 120 installed in a zone other than the part.

The secondary lodge corner box 130, like the secondary trans-corner box 110, may be filled with pearlite powder or glass wool inside a box made of plywood or composite material, and may be provided in singular or plural. have.

Therefore, when combining the system in the transverse corner portion and the longitudinal corner portion, the secondary insulating layer 100 of the liquefied gas cargo hold according to the present invention, the secondary transformer in the form of an insulating box along the circumference of each wall surface forming the cargo hold. It can be seen that the corner box 110 and the secondary lodge corner box 130 are disposed, and a secondary insulating panel 120 in the form of a panel is disposed therein.

On the upper part of the secondary lunge corner box 130, a longitudinal connector 131 is installed at which both ends of the secondary sealing wall 200 extending along the transverse direction of the cargo hold are sealed and connected by welding. do.

The lunge tunal connector 131 may be made of an Invar material, and is disposed across the secondary lodge corner box 130 which are respectively disposed on adjacent wall surfaces in the longitudinal corner portion of the cargo hold.

In addition, the primary insulating layer 100 of the liquefied gas cargo hold according to the present invention, the primary lodge corner block 330 disposed in the longitudinal corner portion, and the primary insulating panel 320 disposed in a region other than the corner portion It includes.

The primary lodge corner block 330 may be configured as an integral type or a plurality of combinations according to the angle of each wall surface constituting the longitudinal corner portion of the cargo hold.

In one embodiment, the primary lodge corner block 330, as shown in Figure 12, the outer wall surface is bent at 135 °, the inner wall surface in contact with the primary sealing wall 400 is also an obtuse angle bent at 135 ° It may be provided in an obtuse angle type.

In addition, as can be seen in FIGS. 12 to 14, the primary lozenge corner block 330 is a single or composite panel form or a single ply made of glass fiber reinforced polyurethane foam (R-PUF) and a plywood or composite material. It may be provided in the form of a wood block, or may be provided in a round type or a multi-line type in addition to the obtuse type, as described in the primary trans corner block 310 installed in the transverse corner portion of the cargo hold.

On the upper portion of the primary lodge corner block 330, a lodge connection plate 331 made of stainless steel (SUS) or Invar may be installed, and a stainless steel membrane sheet disposed in the longitudinal corner portion of the cargo hold (primary) The edge end of the sealing wall) is welded to the lodge connection plate 331 so that sealing in the longitudinal corner portion can be achieved.

The closing (sealing treatment) of the wrinkles formed in the open state on the edge of the primary sealing wall 400 in the longitudinal corner portion of the cargo hold may be made in the same manner as in the transverse corner portion.

On the other hand, as shown in Figures 10 and 11, in the transverse corner of the cargo hold, the corrugated closing member 332 for the purpose of contraction and relaxation between the lodge connection plate 331 and the primary sealing wall 400 Can be installed additionally.

The pleated finish member 332 may be provided with an Invar material, and includes pleats that rise in the inner direction of the cargo hold and extend along the longitudinal direction of the cargo hold.

When the corrugated finishing member 332 is installed, the corrugated finish formed in an open state at the edge of the primary sealing wall 400 in the longitudinal corner portion of the cargo hold may be made by an end cap. .

Reference numeral 142 is a heat insulating member disposed with the secondary lodge corner box 130 in an area where the inner walls of the hull (H) constituting the longitudinal corner portion of the cargo hold meet each other. A good and easy to construct foam or glass wool type heat insulating member can be arranged.

In the conventional NO 96 type cargo hold, since both the primary and secondary sealing walls are made of an invar membrane, an invar tube installed in a corner portion to support them is provided in a lattice structure, and the primary and secondary insulating layers are rigid. It is made of a high box structure.

On the other hand, the liquefied gas cargo hold according to the present invention, since the primary sealing wall 400 is made of a corrugated stainless steel (SUS) membrane, the primary insulating layer 300 can be configured as a panel-shaped insulating layer instead of a box structure. , This has the effect of improving the thermal insulation performance.

In addition, the liquefied gas cargo hold according to the present invention, since the transverse connection 500 only needs to satisfy the function of supporting the secondary sealing wall 200 made of an invar membrane, unlike a conventional lattice structure, a single ten ( It is sufficient if it is provided with a cross-shaped structure, and thus, the structure of the insulation system of the cargo hold is simplified.

In addition, the present invention can be partially reinforced using a high-strength glass fiber reinforced polyurethane foam or plywood laminated block according to the strength required for the insulation system, and applying the concept of the same arrangement as described above to apply the insulation layer Steps that can occur at the boundary of can be minimized.

The present invention is not limited to the described embodiments, and it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

100: 2nd insulation layer 110: 2nd transformer corner box
120: secondary insulation panel 130: secondary longe corner box
131: LONGY TUNAL CONNECTION
200: secondary sealing wall
300: 1st insulation layer 310: 1st transformer corner block
311: transformer connection plate 320: primary insulation panel
330: 1st longe corner block 331: lodge connection plate
332: corrugated finishing member
400: primary sealing wall
500: Transverse connector

Claims (6)

A secondary insulating layer disposed on the inner wall of the hull, a secondary sealing wall made of a metal membrane and installed on the secondary insulating layer, a primary insulating layer disposed on the secondary sealing wall, and an upper portion of the primary insulating layer In the liquefied gas cargo hold of a double barrier structure including a primary sealing wall made of a metal membrane,
The secondary insulating layer is composed of a secondary lodge corner box installed along the longitudinal corner portion of the liquefied gas cargo hold, and a secondary insulating panel disposed in an area excluding the secondary lodge corner box,
The primary insulating layer is composed of a primary lodge corner block installed along a longitudinal corner portion of the liquefied gas cargo hold, and a primary insulating panel disposed in an area excluding the primary lodge corner block.
The secondary longe corner box is provided in the form of a box filled with pearlite powder or glass wool inside a box made of plywood or fiber reinforced plastic,
The primary lodge corner block is provided in the form of a sandwich panel in which a glass fiber reinforced polyurethane foam and a plywood or fiber reinforced plastic are combined, or a single plywood block,
The primary lodge corner block, characterized in that the outer wall surface bent at an angle corresponding to the chamfer surface formed obliquely in the longitudinal corner portion of the cargo hold is supported by the secondary lodge corner box,
Insulation system for liquefied gas cargo holds. The method according to claim 1,
A longitude connector connected to the upper end of the secondary lodge corner box and sealed at an end of the secondary sealing wall by welding; And
It is installed on the upper corner block of the primary lodge and the end of the primary sealing wall is connected to the sealing connection by welding; further comprising;
The loongi tunal connector is made of Invar material,
The longe connection plate is characterized in that it is made of stainless steel (SUS) or Invar (Invar) material,
Insulation system for liquefied gas cargo holds. The method according to claim 2,
The primary insulating panel and the secondary insulating panel, characterized in that provided in the form of a sandwich panel of a glass fiber reinforced polyurethane foam and plywood or fiber-reinforced plastic composite,
Insulation system for liquefied gas cargo holds. The method according to claim 3,
The primary insulation panel is a sandwich panel in which a protective plate made of plywood or fiber-reinforced plastic is bonded to both the upper surface, the lower surface, or the upper and lower surfaces of a glass fiber reinforced polyurethane foam.
Insulation system for liquefied gas cargo holds. The method according to claim 3,
The secondary sealing wall is made of a flat invar membrane in a flat shape,
The primary sealing wall is characterized by consisting of a stainless steel membrane (SUS membrane) in which a number of wrinkles are formed to absorb shrinkage due to cryogenic temperature,
Insulation system for liquefied gas cargo holds. The method according to claim 3,
Further comprising a corrugated finishing member connecting between the primary sealing wall and the lodge connection plate,
The corrugated finishing member is provided with the cargo hold Invar material, characterized in that it includes a wrinkle that rises in the inner direction of the hold and extends along the longitudinal direction of the hold.
Insulation system for liquefied gas cargo holds.

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