KR20160008807A - Plywood For Insulation Structure And Manufacturing Method Of The Same - Google Patents

Plywood For Insulation Structure And Manufacturing Method Of The Same Download PDF

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Publication number
KR20160008807A
KR20160008807A KR1020140088990A KR20140088990A KR20160008807A KR 20160008807 A KR20160008807 A KR 20160008807A KR 1020140088990 A KR1020140088990 A KR 1020140088990A KR 20140088990 A KR20140088990 A KR 20140088990A KR 20160008807 A KR20160008807 A KR 20160008807A
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KR
South Korea
Prior art keywords
plywood
heat insulating
water
insulating structure
ship
Prior art date
Application number
KR1020140088990A
Other languages
Korean (ko)
Inventor
신창민
허윤
김용태
김동헌
루슬란 유딘
로스티슬라프 호레니안
Original Assignee
대우조선해양 주식회사
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Application filed by 대우조선해양 주식회사 filed Critical 대우조선해양 주식회사
Priority to KR1020140088990A priority Critical patent/KR20160008807A/en
Publication of KR20160008807A publication Critical patent/KR20160008807A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Disclosed is a plywood for a heat insulating structure and a method for manufacturing the same. A plywood for a heat insulating structure provided in a liquefied gas holding cargo of a ship of the present invention is characterized by comprising: a collecting plate constituting a structural member in a heat insulating structure of the ship; And a water-repellent coating portion coated on at least one surface of the aggregate plate, wherein the moisture content of the aggregate plate is lowered through the water-repellent coating portion to reduce the thermal conductivity through the plywood.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a plywood for insulated structure,

The present invention relates to a plywood for a heat insulating structure and a method of manufacturing the same, and more particularly, to a plywood for a heat insulating structure and a method of manufacturing the same, And lowering the water content of the laminating board through the portion to reduce thermal conductivity through the plywood, and a method of making the same.

Natural gas is a fossil fuel containing methane as a main component and a small amount of ethane, propane, and the like, and has recently been regarded as a low-pollution energy source in various technical fields.

Natural gas is transported in a gaseous state through land or sea gas pipelines, or is transported to a remote location where it is stored in an LNG carrier in the form of liquefied natural gas (LNG). Liquefied natural gas is obtained by cooling natural gas at cryogenic temperatures (approximately -163 ° C), and its volume is reduced to approximately 1/600 of that of natural gas, making it well suited for long-distance transport through the sea.

The liquefied natural gas carrier is equipped with a cargo (also referred to as a storage tank) capable of storing and storing liquefied natural gas that has been liquefied by cooling the natural gas. Since the boiling point of liquefied natural gas is about -163 ° C at atmospheric pressure, the liquefied natural gas hold is made of materials that can withstand extremely low temperatures such as aluminum steel, stainless steel and 35% nickel steel to safely store and store liquefied natural gas And is designed to be resistant to thermal stress and heat shrinkage, and to prevent heat penetration.

LNG RV (Regasification Vessel), which transports LNG carriers and LNG for unloading LNG to land customers by landing LNG and landing on land, reclaiming stored LNG after arriving at land demand and unloading it into natural gas, Floating marine structures such as LNG FPSO (Floating, Production, Storage and Offloading) and LNG FSRU (FSRU) also include storage tanks installed in LNG carriers or LNG RVs.

In this way, a storage tank for storing LNG in a cryogenic condition is installed in a marine structure such as an LNG carrier, LNG RV, LNG FPSO, and LNG FSRU that transports or stores a liquid cargo such as LNG.

This storage tank can be classified as an independent tank type or a membrane type depending on whether the load of the cargo directly acts on the heat insulating material. Normally, membrane type storage tanks include NO 96 type and Mark III type, and independent tank type storage tanks include MOSS type and IHI-SPB type.

The insulation structure of the membrane type storage tank (cargo hold) includes a primary insulation box and a secondary insulation box, and a barrier for liquefied natural gas is provided between the primary insulation box and the secondary insulation box.

Fig. 1 schematically shows a cross section of a heat insulating structure of a membrane type cargo hold.

As shown in Fig. 1, a vertical member 3 of a plywood is arranged in a plywood-made insulating box, and the remaining inner space is filled with a heat insulating material such as pearlite or polyurethane foam and an inert gas (4) (1) and a secondary insulation wall (2).

The ply wood vertical member arranged for the structural rigidity of the heat insulating box has a drawback in that it is heavy in weight and has a high heat conductivity and thus has a problem of deteriorating the heat insulating performance of the heat insulating box.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a plywood for a heat insulating structure and a method of manufacturing the same, which can increase the heat insulating property and the structural rigidity of the plywood by controlling the water content of the plywood to lower the thermal conductivity.

According to an aspect of the present invention, there is provided a plywood for a heat insulating structure provided in a liquefied gas holding cargo of a ship,

A collecting plate constituting a structural member in the heat insulating structure of the ship; And

And a water-repellent coating portion coated on at least one surface of the aggregate plate,

And a moisture content of the aggregate plate is lowered through the water-repellent coating portion, so that a thermal conductivity through the flywood can be reduced.

Preferably, the water-repellent coating portion may be coated after the luminaire is processed and dried.

Preferably, the water-repellent coating portion may be formed of latex wax or polyurethane foam.

Preferably, the water content of the aggregate plate is lowered, and as the structural rigidity of the flywheel is reinforced, the thickness of the vertical member provided in the heat insulation structure can be reduced.

According to another aspect of the present invention, there is provided a method of manufacturing a plywood for a heat insulating structure provided in a liquefied gas holding cargo of a ship,

1) processing a collecting plate constituting a structural member in the heat insulating structure of the ship;

2) drying the aggregate plate; And

3) water repellent coating on at least one surface of the lenticular plate,

Wherein the water content of the aggregate plate is lowered to reduce the thermal conductivity through the plywood.

Preferably, the collecting plate may be water-repellent coated with latex wax or polyurethane foam.

According to the present invention, there is provided a plywood for a heat insulating structure capable of lowering the moisture content by drying the aggregate plate followed by water repellent coating on the surface thereof.

By reducing the moisture content of the plywood to thereby reduce the thermal conductivity and increase the structural rigidity, it is possible to increase the heat insulating property of the cargo hold and to reduce the thickness of the plywood.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 schematically shows a cross section of a heat insulating structure of a membrane type cargo hold.
2 schematically shows a ply for an insulating structure according to an embodiment of the present invention.
Fig. 3 is a view showing a latex wax, and Fig. 4 is a view of a plywood for a heat insulating structure, which is water-repellent coated with a polyurethane foam.

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

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

Fig. 2 schematically shows a plywood for a heat insulating structure according to an embodiment of the present invention.

As shown in FIG. 2, the insulating plywood 100 according to an embodiment of the present invention is a plywood for application to a heat insulating structure provided in a liquefied gas holding cargo of a ship. In the insulating structure of a ship, And a water repellent coating part 120 coated on at least one surface of the collecting plate.

By lowering the water content of the collecting plate 110 through the water-repellent coating part 120, the thermal conductivity through the plywood can be reduced.

The water-repellent coating part 120 is coated after drying the collecting board 100 made of wood and lowering the water content in the wood, for example, it may be made of latex wax or polyurethane foam.

The water-repellent coating portion 120 may be prepared by applying a polyurethane foam or a latex wax to the collecting plate 110 by spraying.

When the coating is carried out using a polyurethane foam, it is necessary to remove foreign matter such as moisture and oil dust on the surface of the polyurethane foam, and the coating can be carried out in the absence of an empty space or scratches. Specifically, a polyurethane foam may be primarily sprayed onto the collecting plate 110 to be fixed for 2 hours or more, and then a second waterproof coating may be performed.

When coating with latex wax, a brush can be utilized.

FIGS. 3 and 4 show the state of the plywood which is water-repellent coated with latex wax and polyurethane foam, respectively.

In this embodiment, the liquefied gas is liquefied at a low temperature, such as LNG, LPG, etc., and the plywood of this embodiment is applied to a cargo hold insulation structure of a ship or a special ship having a cargo hold to store such liquefied gas . Such a vessel may be, for example, an LNG carrier (LNGC).

Particularly, since the LNG is at a cryogenic temperature of about -163 ° C., a heat insulating structure is very important to prevent heat input and / or exhaust to a cargo hold in which LNG is sensitive to heat input. For this purpose, in the case of a membrane type storage tank, And a barrier is provided between the heat insulating boxes for liquid tightness. The inside of the heat insulating box is provided with a vertical member for giving structural rigidity and increasing buckling strength. The plywood of this embodiment can be applied to the outer wall and vertical member of such a heat insulating box.

In the adiabatic structure, the ply wood part is a part where heat is largely infused into the storage tank because the ply part is not filled with the heat insulating material. The ply wood for insulation of this embodiment lowers the water content of the lining board to improve the heat insulating property, It is possible to reduce the BOR (Boil Off Rate) of the storage tank.

On the other hand, the water content also causes a weakening of the structural stiffness of the plywood. Since the insulating plywood of the present embodiment lowers the water content and reinforces the structural rigidity, the thickness of the plywood vertical member provided in the heat insulating structure can be reduced It is expected that the weight of the cargo hold can be lightened and the production cost can be reduced, and the BOR can be further lowered by increasing the insulation space of the cargo hold by increasing the filling space of the insulation.

It is known that the heat input through the plywood is about 50% in the heat insulating structure of the cargo hold. By controlling the water content of the plywood to about 5% by applying this embodiment, the thermal conductivity 9%. Also, by controlling the water content, the structural strength is expected to increase 1.5 times and the BOR of the storage tank can be reduced by about 17%.

As described above, according to the present embodiment, the insulating plywood provided in the liquefied gas holding window of the ship is manufactured by: 1) processing the collecting plate constituting the structural member in the heat insulating structure of the ship; 2) drying the aggregate plate to control the water content; And 3) water-repellent coating on at least one surface of the laminated plate with latex wax or polyurethane foam.

By lowering the water content of the aggregate plate, it is possible to reduce the thermal conductivity through the plywood in the insulating structure. By lowering the water content, the strength of the plywood can be increased, the thickness of the plywood can be reduced, It is possible to increase the heat insulating property while reducing the weight of the cargo hold.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

100: Adiabatic structural plywood
110: laminated plate
120: Water repellent coating layer

Claims (6)

Claims [1] A plywood for a heat insulating structure provided in a liquefied gas holding cargo of a ship,
A collecting plate constituting a structural member in the heat insulating structure of the ship; And
And a water-repellent coating portion coated on at least one surface of the aggregate plate,
Wherein water content of the aggregate plate is lowered through the water-repellent coating portion to reduce a thermal conductivity through the flywheel. The method according to claim 1,
Wherein the water-repellent coating part is coated after the luminaire is processed and dried. 3. The method of claim 2,
Wherein the water-repellent coating portion is made of latex wax or polyurethane foam. The method according to claim 1,
Wherein the water content of the aggregate plate is lowered and the thickness of the vertical member provided in the heat insulating structure is reduced as the structural rigidity of the flywheel is reinforced. A method of manufacturing a plywood for a heat insulating structure provided in a liquefied gas holding cargo of a ship,
1) processing a collecting plate constituting a structural member in the heat insulating structure of the ship;
2) drying the aggregate plate; And
3) water repellent coating on at least one surface of the lenticular plate,
Wherein the water content of the aggregate plate is lowered so that the thermal conductivity through the plywood can be reduced. 6. The method of claim 5,
Wherein the collecting plate is water-repellent coated with latex wax or polyurethane foam.
KR1020140088990A 2014-07-15 2014-07-15 Plywood For Insulation Structure And Manufacturing Method Of The Same KR20160008807A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140088990A KR20160008807A (en) 2014-07-15 2014-07-15 Plywood For Insulation Structure And Manufacturing Method Of The Same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140088990A KR20160008807A (en) 2014-07-15 2014-07-15 Plywood For Insulation Structure And Manufacturing Method Of The Same

Publications (1)

Publication Number Publication Date
KR20160008807A true KR20160008807A (en) 2016-01-25

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Application Number Title Priority Date Filing Date
KR1020140088990A KR20160008807A (en) 2014-07-15 2014-07-15 Plywood For Insulation Structure And Manufacturing Method Of The Same

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Country Link
KR (1) KR20160008807A (en)

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