KR20170048825A - Cargo for liquefied gas - Google Patents

Cargo for liquefied gas Download PDF

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Publication number
KR20170048825A
KR20170048825A KR1020150149395A KR20150149395A KR20170048825A KR 20170048825 A KR20170048825 A KR 20170048825A KR 1020150149395 A KR1020150149395 A KR 1020150149395A KR 20150149395 A KR20150149395 A KR 20150149395A KR 20170048825 A KR20170048825 A KR 20170048825A
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KR
South Korea
Prior art keywords
panel
connecting unit
panel connecting
auxiliary barrier
liquefied gas
Prior art date
Application number
KR1020150149395A
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Korean (ko)
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KR101824428B1 (en
Inventor
정종훈
문성영
박성호
박소영
진용민
Original Assignee
삼성중공업 주식회사
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Priority to KR1020150149395A priority Critical patent/KR101824428B1/en
Publication of KR20170048825A publication Critical patent/KR20170048825A/en
Application granted granted Critical
Publication of KR101824428B1 publication Critical patent/KR101824428B1/en

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/06—Coverings, e.g. for insulating purposes
    • 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/001—Thermal insulation specially adapted for cryogenic vessels
    • 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
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/025—Bulk storage in barges or on ships
    • F17C3/027—Wallpanels for so-called membrane tanks
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0358—Thermal insulations by solid means in form of panels
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0631—Three or more walls
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • F17C2270/0107—Wall panels

Abstract

A liquefied gas cargo hold according to the present invention comprises: a main barrier which surrounds an accommodation space for liquefied gas; and a thermal insulation panel assembly which surrounds the main barrier to thermally insulate liquefied gas from the outside, wherein the thermal insulation panel assembly comprises: a plurality of lower thermal insulation panel assemblies; an auxiliary barrier disposed on the lower thermal insulation panel assemblies to seal them; an upper thermal insulation panel assembly stacked on the auxiliary barrier; and a panel connection unit which connects the lower thermal insulation panel assemblies to each other, wherein the panel connection unit is formed in a flat plate shape and has a protrusion formed on one side thereof, and a recess in a shape corresponding to the protrusion of the panel connection unit is formed on the lower thermal insulation panel assembly, to allow the panel connection unit to engage with the recess of the thermal insulation panel assembly.

Description

{CARGO FOR LIQUEFIED GAS}

The present invention relates to a liquefied gas holding window, and more particularly, to a liquefied gas holding window including a two-layered insulating panel assembly.

Liquefied gas is a liquid made by cooling or compressing gas, and consumption of liquefied gas such as Liquefied Natural Gas (LPG) or LPG (Liquefied Petroleum Gas) is rapidly increasing worldwide.

Liquefied natural gas (LNG), which is an example of liquefied gas, refers to a colorless transparent cryogenic liquid having a volume of methane-based natural gas cooled to -162 ° C and reducing its volume by one-sixth, In order to utilize natural gas as energy, efficient transportation methods have been examined that can be mass-shipped from the production base to the destination of the demand site. As part of this effort, a liquefied natural gas transport vessel capable of transporting large volumes of liquefied natural gas to sea was developed.

The liquefied natural gas transportation vessel must have a cargo which can store and store the liquefied natural gas liquefied at a cryogenic temperature.

That is, since the liquefied natural gas has a higher vapor pressure than the atmospheric pressure and has a boiling temperature of about -162 ° C, in order to safely store and store such liquefied natural gas, For example, it should be made of aluminum steel, stainless steel, 35% nickel steel, etc. It should be designed with a unique insulation panel structure which is resistant to thermal stress and heat shrinkage and prevents heat penetration. Such a cargo hold of a liquefied natural gas transportation vessel can be divided into a self-supporting type and a membrane type depending on its structure. Among them, Korean Patent Laid-Open Publication No. 10-2012-0013233 Feb. 14, 2012) discloses a liquefied natural gas storage tank and a method of manufacturing the same.

This membrane-type liquefied natural gas storage tank is an efficient means of transporting liquefied natural gas. However, the use frequency of the liquefied natural gas storage tank increases with the number of blades. However, since the connection structure and manufacturing process of the insulation panels are complicated, . ≪ / RTI > Therefore, efforts to solve such a problem are continuing, and the present invention is also part of such efforts.

Korean Published Patent Application No. 10-2012-0013233 (2012.02.14.)

It is an object of the present invention to provide a liquefied gas cargo hold which can be easily fixed and connected with a small force in connecting the insulation panel assemblies to each other.

According to an aspect of the present invention, there is provided a liquefied gas holding window including a main wall surrounding an accommodating space of a liquefied gas, and an insulating panel assembly surrounding the main wall and insulated from the outside of the liquefied gas, A plurality of lower insulation panel assemblies, an auxiliary barrier provided on the lower insulation panel assembly to seal the lower insulation panel assembly, an upper insulation panel assembly stacked on the auxiliary barrier, Wherein the panel connection unit is formed in a flat plate shape and has a protrusion on one surface thereof and the lower insulation panel assembly is provided with a recessed portion having a shape corresponding to the protrusion of the panel connection unit, And is inserted and joined to the concave portion of the panel assembly Which it may be provided with a liquefied gas storage tank.

The lower insulation panel assembly may include a lower insulation panel and a lower reinforcement panel stacked on the upper part of the lower insulation panel, and the panel connection unit may be inserted into the lower reinforcement panel.

The protrusion of the panel connecting unit may be provided on a side surface of the panel connecting unit, and the panel connecting unit may be inserted into the recessed portion of the heat insulating panel assembly.

The panel connecting unit may have a trapezoidal shape.

The panel connecting unit may include a fixing member provided in a fixing member mounting groove provided on a side surface of the panel connecting unit. The fixing member may include a protruding member protruding outwardly from the side surface, an inner surface of the fixing member mounting groove, Wherein the panel connecting unit is coupled to the lower insulation panel assembly by inserting the protruding member into a fixture engaging groove provided in a concave portion of the lower heat insulating panel assembly, the elastic member being provided between the protruding members to provide an elastic force to the protruding member, As shown in FIG.

The projecting portion of the panel connecting unit is provided on a lower surface of the panel connecting unit, and the protruding portion of the panel connecting unit is press-fitted into the recessed portion of the heat insulating panel assembly in an interference fit manner.

The liquefied gas holding window according to the present invention includes a panel connecting unit that can be easily fastened and fixed in connecting the heat insulating panel assemblies to each other so that the plurality of heat insulating panel assemblies can be connected and fixed to each other without using a separate jig or fixing means. The manufacturing process is simplified and the process time is reduced.

Further, with the fixing member provided in the panel connecting unit, the heat insulating panel assemblies of the liquefied gas holding window can be easily and stably fixed and installed to each other.

FIG. 1 is a side view of a liquefied gas holding window assembled to show a structure of a liquefied gas holding window according to a first embodiment of the present invention.
Fig. 2 is a side view of the enlarged portion A of Fig.
3 is a perspective view showing a process of installing a panel connecting unit in a lower insulating panel assembly according to a first embodiment of the present invention.
4 is a perspective view showing a panel connecting unit installed in a lower insulating panel assembly according to a first embodiment of the present invention.
5 (a) is a front view and (b) is a rear view of the panel connecting unit of the liquefied gas holding window according to the second embodiment of the present invention.
6 is a perspective view illustrating a process of installing a panel connecting unit in a lower insulating panel assembly according to a second embodiment of the present invention.
7 is a perspective view of a panel connecting unit of a liquefied gas holding window according to a third embodiment of the present invention.
8 shows a cross-sectional view of BB of Fig.
9 is a perspective view illustrating a process of installing a panel connecting unit in a lower insulating panel assembly according to a third embodiment of the present invention.
FIG. 10 shows an enlarged view of FIG. 9C.

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

The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below and may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

A liquefied gas hold according to an embodiment of the present invention is used to store and / or transport cryogenic liquefied gas. The liquefied gas is made of liquid by cooling or compressing the gas, and includes liquefied natural gas (LNG), liquefied petroleum gas (LPG), dimethyl ether (DME) and the like .

Liquefied gas cargo holds are used to transport liquid gas such as LNG carrier, LNG RV (Regasification Vessel) carrier, LPG carrier or ethylene carrier, FSRU (Floating Storage Regulation Unit), FPSO (Floating Production Storage Offloading) Or Barge Mounted Power Plant (BMPP), or to marine floating plants with vaporization facilities. In addition, the liquefied gas cargo holds include not only the facilities installed on the sea, but also those used for facilities to store or produce liquefied gas installed on land.

Hereinafter, a membrane-type cargo hold of a liquefied gas holding cargo will be described as an example.

FIG. 1 is a side view of a liquefied gas holding window assembled to show a structure of a liquefied gas holding window according to a first embodiment of the present invention.

The liquefied gas holding window surrounds a space capable of accommodating the liquefied gas and includes a main wall 400 directly contacting the liquefied gas, a heat insulating panel 400 surrounding the main wall 400, Assemblies 100 and 300, and an outer wall 10 that surrounds and firmly supports the insulating panel assemblies 100 and 300.

The kitchen wall 400 is for sealing the storage space in which the storage fluid is received and requires airtightness (or water tightness). Liquefied gas is usually stored in a liquid state because it can be kept at a cryogenic temperature below the boiling point. However, depending on the change of temperature or pressure, vaporization of some liquefied gas may occur, and the pressure inside the cargo hold increases greatly. When the kitchen wall 400 penetrates due to such an increase in pressure or the like, the liquid or gaseous liquefied gas can be introduced into the heat insulating panel assemblies 100 and 300. As the temperature of the introduced liquefied gas increases, the volume rapidly expands and damages the heat insulating panel assembly. The damage to the cargo holds a significant amount of time and money in repairs, so the airtightness of the barrier is considered very important.

The kitchen wall 400 can be made of a metal material such as an invar alloy (INVAR), stainless steel (SUS), or an aluminum alloy so as to maintain its physical and chemical state even at a low temperature. The kitchen wall 400 may be formed by connecting a plurality of kitchen wall 400 sheets and may be welded to each other to maintain airtightness.

As a method of welding the kitchen wall 400, various welding methods used in the related art can be used and include lap welding or butt welding. An automatic welding apparatus using laser welding or plasma welding may also be used to improve uniformity of work quality while improving welding quality. Above-mentioned lap welding, butt welding, laser welding, plasma welding, etc. are well known in the related art, so a detailed description will be omitted.

Because the kitchen wall 400 is in direct contact with the cryogenic storage fluid, it is exposed to rapid contraction and expansion. The kitchen wall 400 may be damaged due to accumulation of fatigue due to repeated heat shrinkage and thermal expansion, or breakage of the welded portion when heat shrinkage occurs. Because of this problem, the kitchen wall 400 includes a kitchen wall corrugation 410 to have low in-plane stiffness. The kitchen wall corrugation 410 reduces the thermal stress at the welded portion by resiliently deforming the shape corresponding to the thermal stress.

The kitchen wall 400 includes a first corrugation 411 and a second corrugation 412 arranged in different directions and an intersection (not shown) where the two kitchen wall corrugations 410 intersect. The thermal stress acting in the in-plane direction of the kitchen wall 400 can be resolved by the two-directional kitchen wall corrugations 410. That is, the thermal stress acting in the longitudinal direction of the first wrinkled portion 411 is eliminated by the stretchability of the second wrinkled portion 412, and the thermal stress acting in the longitudinal direction of the second wrinkled portion 412 is The elasticity of the wrinkled portion 411 can be eliminated.

Although the two-directional kitchen wall corrugated part 410 vertically arranged is shown in the figure, it may include three or more corrugated parts as necessary. For example, the three corrugations may be arranged at an angle of 60 degrees with respect to each other.

The heat insulating panel assemblies 100 and 300 include the heat insulating panel assemblies 100 and 300 installed on the flat surface portion and the heat insulating panel assemblies (not shown) installed on the corner portions. The corner portion connects the flat portions disposed at different angles and includes a corner portion to which two different heat insulating panels are connected and a vertex portion to which three different heat insulating panels are connected. Hereinafter, the heat insulating panel assemblies 100 and 300 installed on the flat surface will be described as a basis.

The heat insulating panels 110 and 310 can be generally made of a material having excellent heat insulation performance and light weight such as a polyurethane foam (PUF) or a reinforced polyurethane foam (R-PUF, Reinforced PUF) It can be kept at an ultra-low temperature state by being insulated from the outside. The insulation panel assembly generally has a double insulation structure including an upper insulation panel 310 and a lower insulation panel 110 for the purpose of improving heat insulation performance and ease of repair.

An inner hull can be used for the outer wall 10 and supports the load of the storage fluid. And the lower insulating panel 110 may be fixed to the outer wall 10.

The lower first reinforcing panel 120 may be coupled to the bottom surface of the lower insulating panel 110 so as to be firmly fixed to the outer wall 10. The lower first reinforcing panel 120 may be formed of plywood or the like and may be attached to the bottom of the lower insulating panel 110 using an adhesive such as an epoxy glue or the like.

The lower insulating panel 110 may be fixed to the outer wall 10 via a lower first reinforcing panel 120 adhered to the bottom surface. The outer wall 10 may be welded with a stud bolt (not shown) for coupling the lower heat insulating panel 110.

A mastic 11 having an adhesive force and / or a level pad 12 for adjusting a level difference may be interposed between the lower first reinforcing panel 120 and the outer wall 10. In particular, since the mastic 11 has both adhesive force and elasticity, it is possible to combine the outer wall 10 and the lower heat insulating panel 110 and mitigate impact transmitted to each other.

The plurality of lower insulating panels 110 may be disposed adjacent to each other, and may be arranged in a grid pattern, for example. Being arranged in a lattice shape means that the lower insulating panels 110 are arranged not only adjacent to each other in the first direction but also adjacent to each other in the second direction.

The gap insulator 140 can be inserted between the adjacent lower insulating panels 110. [ The crevice insulation 140 may be a thermal insulation material capable of filling a gap between the lower thermal insulation panels 110, and a glass wool or the like may be used. The gap insulating material 140 may be inserted after the lower insulating panel 110 is installed or attached to the side of the lower insulating panel 110.

A lower second reinforcing panel 130 may be coupled to an upper portion of the lower insulating panel 110 so as to fix the auxiliary barrier 200 to be described later. The lower second reinforcing panel 130 may be made of plywood or the like and may be attached to the upper surface of the lower heat insulating panel 110 using an adhesive such as epoxy glue. The auxiliary barrier 200 may be connected to the auxiliary barrier fixing member 160 by welding or the like and fixed to the lower second reinforcement panel 130.

The insulating panel assemblies 100 and 300 may include an auxiliary barrier 200 interposed between the upper insulating panel 310 and the lower insulating panel 110. The auxiliary barrier 200 protects the lower insulation panel 110 when the kitchen wall 400 is infiltrated, thereby greatly reducing the time and cost required for the repair.

The auxiliary barrier 200 may be formed of a metal material such as an INVAR, stainless steel or an aluminum alloy as in the case of the kitchen wall 400 or a rigid triplex and a support triple triplex) can be used.

The adhesive type manufacturing method and the welding type manufacturing method are used in accordance with the difference in the method of connecting the auxiliary barrier 200 to the lower insulating panel 110. [ Although not shown in the drawing, in the adhesive type manufacturing method, a rigid triplex is attached by using an adhesive such as an epoxy glue on the lower heat insulating panel 110, and the adjacent rigid triplex is connected by a support triplex, State can be completed. At this time, the shuffle triplex may also be attached to the rigid triplex by an adhesive.

A liquefied gas holding window according to the first embodiment of the present invention is a welded manufacturing method in which adjacent auxiliary walls 200 are welded together. The welding method is such that the auxiliary barrier 200 is mechanically coupled instead of bonding to the lower insulating panel 110 and the upper insulating panel 310 is also bonded to the lower insulating panel 110 110).

The secondary barrier 200 may include a secondary corrugation 210 to have an in-plane stiffness. The auxiliary barrier ribs 210 are elastically deformed in shape corresponding to thermal stresses, thereby reducing thermal stress at the welded portion. The auxiliary barrier ribs 210 may be formed by a press method or the like.

The auxiliary barrier 200 includes a first wrinkle portion and a second wrinkle portion arranged in different directions and an intersection portion (not shown) where the two auxiliary barrier wrinkle portions 210 intersect with each other. The thermal stress acting in the in-plane direction of the auxiliary barrier 200 can be relieved by the auxiliary barrier ribs 210 in the two directions. That is, the thermal stress acting in the longitudinal direction of the first wrinkle part is canceled by the elasticity of the second wrinkle part, and the thermal stress acting in the longitudinal direction of the second wrinkle part can be solved by the stretchability of the first wrinkle part.

Although two auxiliary barrier ribs 210 parallel to each other are shown in the drawing, they may include three or more wrinkles as required. For example, the three corrugations may be arranged at an angle of 60 degrees with respect to each other.

The auxiliary barrier ribs 210 provided in the auxiliary barrier 200 may be convex downward toward the lower insulating panel 110. [ At this time, the lower second reinforcing panel 130 is formed with grooves for receiving the auxiliary barrier ribs 210 of the auxiliary barrier 200, so that interference with the auxiliary barrier ribs 210 can be avoided. The groove may be formed on the upper surface of the lower second reinforcing panel 130 or may be formed to penetrate the lower second reinforcing panel 130.

The auxiliary barrier 200 sheet may be provided to extend over a plurality of lower insulating panels 110. The meaning of being laid across the lower insulating panel 110 includes the case of completely covering and the case of covering only partly.

The auxiliary barrier 200 may be fixed to the auxiliary barrier fixing member 160 provided on the upper portion of the lower insulating panel 110. Particularly, when the lower second reinforcing panel 130 is provided, the auxiliary barrier fixing member 160 can be coupled to the lower second reinforcing panel 130. The auxiliary barrier fixing member 160 may be mechanically coupled to the lower second reinforcing panel 130 by a rivet or the like and may be formed of a metal such as SUS and welded to the auxiliary barrier 200. The auxiliary barrier fixing member 160 may be received in the fixing member coupling groove 130b formed in the lower second reinforcing panel 130 and may not protrude from the upper surface of the lower second reinforcing panel 130. [

In addition, the auxiliary barrier fixing member 160 may be provided in a strip shape and may be arranged in different directions to form an intersection. For example, two strips orthogonal to each other. The auxiliary barrier fixing member 160 may be disposed parallel to the edge of the lower heat insulating panel 110. [ In addition, the auxiliary barrier fixing member 160 may be provided as one strip or may be provided such that a plurality of strips are continuously connected.

The plurality of auxiliary barrier fastening members 160 can form one closed figure by connecting adjacent auxiliary barrier fastening members 160 (including being connected by a virtual extension line without being directly connected).

One auxiliary barrier 200 sheet constituting the auxiliary barrier 200 may have a shape corresponding to the shape of the closed figure formed by the auxiliary barrier fixing member 160. [ The corners of the sheets of the auxiliary barrier 200 can be arranged and fixed so as to overlap the auxiliary barrier fixing member 160, respectively. For example, the sheet of auxiliary barrier 200 may be fixed to the auxiliary barrier fixing member 160 in a tack welding manner.

Next, a process of installing the auxiliary barrier 200 after the lower insulating panel 110 is installed will be described.

The auxiliary barrier 200 may be formed by fixing one auxiliary barrier 200 sheet and then fixing another auxiliary barrier 200 sheet on one adjacent side. At this time, at least one corner of the edge of the auxiliary barrier 200 sheet adjacent to the previously installed auxiliary barrier 200 sheet is disposed to overlap with the sheet of the auxiliary barrier 200 previously provided and the other edge is disposed on the auxiliary barrier fixing member 160 As shown in FIG. For example, the fixing of the auxiliary barrier 200 sheet and the auxiliary barrier 200 sheet and the fixing of the auxiliary barrier 200 sheet and the auxiliary barrier fixing member 160 can be performed using a tack welding method.

The above installation process is continuously performed to fix all the sheets of the auxiliary barrier 200 on the lower insulating panel 110. However, since it is still in the state of being available to be contacted between adjacent auxiliary barrier 200 sheets, it is necessary to perform the main welding in order to maintain airtightness.

Both edges of the sheets of the auxiliary barrier 200 adjacent to each other are welded by lap welding or butt welding, thereby ensuring airtightness. As the welding method which can be used at this time, various welding methods used in the related art can be used. An automatic welding apparatus using laser welding or plasma welding may also be used to improve uniformity of work quality while improving welding quality. Above-mentioned lap welding, butt welding, laser welding, plasma welding, etc. are well known in the related art, so a detailed description will be omitted.

On the other hand, the auxiliary barrier fixing member 160 is positioned below the welding line (or welding seam) when the adjacent auxiliary barrier 200 sheets are welded together, thereby preventing deformation of the auxiliary barrier 200 sheet due to welding heat . It is possible to prevent deformation of the auxiliary barrier 200 sheet, which may be caused by high temperature, particularly when plasma welding is used. At this time, the welding heat is transferred to the auxiliary barrier fixing member 160 during the overlap welding or the butt welding between the auxiliary barrier 200 sheets, so that the auxiliary barrier fixing member 160 and the auxiliary barrier 200, The sheets may be welded together.

The main welding of the auxiliary barrier 200 sheet and the auxiliary barrier sheet 200 can be performed using an automatic welding apparatus. In particular, welding of the corrugated portion of the auxiliary barrier 200 can also be performed using an automatic welding apparatus. In this case, in order to manually weld the auxiliary barrier 200 sheet and the auxiliary barrier 200 sheet by welding, or to use the automatic welding apparatus, Fit-Up. In particular, the use of automatic welding equipment is important to the work of the foot.

Up work may be performed by a fit-up zig (not shown) fixedly installed on the lower insulating panel 110. [ The pick-up jig can be coupled to the stud bolt protruding on the secondary barrier fixing member 160 or fixed on the secondary barrier 200 sheet by a suction type.

The operator can press the sheet of the auxiliary barrier 200 covering the upper side or the sheet of the auxiliary barrier 200 to close the sheet by using the pullup jig. At this time, in order to lift up the auxiliary barrier 200 sheet laid below, an adsorption method and an adhesion method can be used.

Usually, after the auxiliary barrier 200 sheet is piled up, the auxiliary barrier 200 sheet is fixed to each other by performing the tangible folding. The auxiliary barrier 200 sheets secured to each other are easily welded by the automatic welding device. In particular, in the case of a wrinkle portion including a curved portion, a sophisticated work of finishing is required in order to improve the welding quality by the automatic welding device.

The automatic welding apparatus performs welding while moving along a rail which is fixed to the lower heat insulating panel 110. Therefore, in order to use the automatic welding device, it is necessary to fix the rail around the welding line.

Fig. 2 is a side view of the enlarged portion A of Fig. The liquefied gas holding window according to the first embodiment of the present invention includes a panel connecting unit 150 connecting the lower insulating panel assemblies 100 installed in the hull outer wall 10 to each other.

The panel connecting unit 150 is for fixing the positions of the lower insulating panel assemblies 100 and serves to prevent the intervals / positions of the lower insulating panel assemblies 100 from being changed. The lower insulation panel assembly 100 is installed in a different form or spacing depending on the shape of the outer wall 10. By providing such a panel connection unit 150, tensile stress is ensured between the lower insulation panel assemblies 100 So that the installation interval and the like are kept constant.

The panel connecting unit 150 may have a plate shape. The panel connecting unit 150 having such a shape may include a protrusion 150a on both sides. The projecting portion 150a serves to fasten the panel connecting unit 150 and the lower insulating panel assembly 100 together with the recessed portion 130a of the lower second reinforcing panel 130. [ At this time, the recessed portion 130a is provided in a shape corresponding to the protrusion 150a formed on both sides of the panel connecting unit 150, and can prevent the panel connecting unit 150 from moving up and down.

The panel connecting unit 150 connecting the lower insulating panel assemblies 100 may be configured such that the panel connecting unit 150 is inserted into the recess 130a provided in the lower second reinforcing panel 130 of the lower insulating panel assembly 100, Are inserted and joined together. The panel connecting unit 150 is inserted into the concave portion 130a and fastened simply by aligning the blocks. At this time, the panel connecting unit 150 may have a trapezoidal shape in cross section so as to be easily inserted into the second reinforcing panel 130.

3 and 4 are perspective views illustrating a process of installing the panel connecting unit 150 in the heat insulating panel assembly 100 and a perspective view of the panel connecting unit 150 installed in the panel connecting unit 150 ) Is shown in detail.

3 and 4, the panel connecting unit 150 of the lower insulating panel assembly 100 has a trapezoidal cross section and is inserted into the recessed portion 130a formed in the lower second reinforcing panel 130 To the lower insulating panel assembly 100 in a similar manner. The panel connecting unit 150 having the corresponding cross-sectional shape and the lower second reinforcing panel 130 are inserted and inserted into each other.

This fastening method can be easily fastened and fixed in connecting the heat insulating panels to each other, so that it is possible to connect and fix the plurality of heat insulating panels to each other without using fixing means such as a separate jig or bolt nut, It has the advantages of simplification and less processing time.

5 is a front view and a rear view of a panel connecting unit of a liquefied gas holding window according to a second embodiment of the present invention, and FIG. 6 is a perspective view of a panel connecting unit in a lower insulating panel assembly according to a second embodiment of the present invention And FIG.

5 and 6, the liquefied gas holding window according to the second embodiment of the present invention is characterized in that the protrusion 1150a of the panel connecting unit 1150 is provided on the lower surface of the panel connecting unit 1150, The protrusion 1150a of the unit 1150 is press-fitted to the recessed portion 1130a of the lower second reinforcing panel 1130 in a forced fit manner.

At this time, the panel connecting unit 1150 may be provided with the protrusions 1150a in two rows at regular intervals. And the two rows are sandwiched between the two lower second reinforcing panels 1130, thereby joining the lower insulating panel assemblies provided with the lower second reinforcing panel 1130 to each other.

At this time, the lower second reinforcing panel 1130 may be provided with a recessed portion 1130a having a shape corresponding to the protruding portion 1150a of the panel connecting unit 1150. As shown in the drawing, if the projecting portions 1150a are provided in the panel connecting unit 1150 in two rows at regular intervals, the recessed portions 1130a are also provided with two rows of grooves formed at corresponding intervals.

In this method, the plurality of heat insulating panel assemblies can be connected and fixed to each other without using a separate jig or fixing means, which simplifies the manufacturing process and reduces the processing time.

Fig. 8 is a perspective view of the panel connecting unit of the liquefied gas holding window according to the third embodiment of the present invention, and Fig. 8 is a sectional view taken along the line BB of Fig. FIG. 7 is a perspective view showing a process of installing a panel connecting unit in an assembly. FIG.

7 to 9, the panel connecting unit 2150 of the liquefied gas holding window according to the third embodiment of the present invention includes a fixing body 2153 provided on both sides. The fixing member 2153 is provided between the projecting member 2151 and the panel connecting unit 2150 so as to protrude from the protruding member 2151. The protruding member 2151 protrudes outward from the side of the panel connecting unit 2150, And an elastic member 2152 for providing an elastic force to the elastic member 2152. Hereinafter, configurations of the panel connecting unit 2150 and the lower second reinforcing panel 2130 will be described in detail.

The panel connecting unit 2150 of the third embodiment may have protrusions 2150a formed on both sides thereof in the same manner as the panel connecting unit 150 of the first embodiment. The panel connecting unit 2150 is slidably inserted into the lower second reinforcing panel 2130 to be described later. The projecting portion 2150a serves to restrict the upward and downward movement of the panel connecting unit 2150 by the recessed portion 2130a provided in the lower second reinforcing panel 2130. [

In addition, the panel connecting unit 2150 may be provided with the fixture mounting groove 2150b in the projection 2150a. The fixing member mounting groove 2150b is for fixing the fixing member 2153 therein so that the fixing member 2150c can be formed so that the protruding member 2151 of the fixing member 2153 does not come out. So that the projecting member 2151, which is subjected to the elastic force by the elastic member 2152, does not fall outside the fixture mounting groove 2150b.

Here, the projecting member 2151 serves to limit the forward and backward movement of the panel connecting unit 2150 together with the elastic member 2152. [ This function can be performed by inserting the protruding member 2151 into the fixture receiving groove 2130b provided in the lower second reinforcing panel 2130 to be described later.

At this time, the fixing jig grooves 2130b may be formed in the recessed portion 2130a provided in the lower second reinforcing panel 2130. [ That is, when the panel connecting unit 2150 is slidably inserted into the lower second reinforcing panel 2130, the protruding member 2151 is engaged with the fixture latching groove 2130b provided in the concave portion 2130a, Thereby preventing the connecting unit from moving forward and backward.

The projecting portion 2150a of the panel connecting unit 2150 and the projecting member 2151 of the fixing member 2153 are engaged with the recessed portion 2130a formed in the lower second reinforcing panel 2130 and the fixture latching groove 2130b, So that the panel connecting unit 2150 is completely fixed to the lower insulating panel assembly 100 to securely fix the lower insulating panel assemblies 100 to each other.

This method has a panel connecting unit 2150 that can be easily fastened and fixed in connecting the insulating panel assemblies 100 to each other so that a plurality of the insulating panel assemblies 100 can be mounted without using a separate jig or fixing means. So that the manufacturing process is simplified and the process time is reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, You will understand. Accordingly, the true scope of the invention should be determined only by the appended claims.

10: outer wall, 11: mastic,
12: level pad, 100: lower insulating panel assembly,
110: lower insulation panel, 120: lower first reinforcing panel,
130: lower second reinforcing panel, 130a: concave portion,
130b: fixing member fastening groove, 140: crevice insulator,
150: panel connecting unit, 150a: projection,
160: auxiliary barrier fixing member, 200: auxiliary barrier,
210: auxiliary barrier ribs, 300: upper insulation panel assembly,
310: upper insulation panel, 320: upper first reinforcing panel,
330: upper second reinforcing panel, 400: kitchen wall,
410: kitchen wall corrugated part, 411: first corrugated part,
412: second wrinkle portion, 1130: lower second reinforcing panel,
1130a: Entrance portion, 1150: Panel connecting unit,
1150a: protruding portion, 2130: lower second reinforcing panel,
2130a: recessed portion, 2130b: fastener catching groove,
2150: panel connecting unit, 2150a: projection,
2150b: fixture mounting groove, 2150c: latching jaw,
2151: projecting member, 2152: elastic member,
2153: Fixture

Claims (6)

1. A liquefied gas cargo hold comprising a main wall surrounding a space for accommodating a liquefied gas and an insulating panel assembly surrounding the main wall and insulated from the outside by liquefied gas,
The heat insulating panel assembly includes a plurality of lower insulating panel assemblies, an auxiliary barrier provided on the lower insulating panel assembly to seal the lower insulating panel assembly, an upper insulating panel assembly stacked on the auxiliary barrier, A panel connecting unit connecting the assemblies to each other,
Wherein the panel connecting unit is provided in a flat plate shape and has a projection on one surface thereof,
Wherein the lower insulating panel assembly has a recessed portion having a shape corresponding to the protrusion of the panel connecting unit,
And the panel connecting unit is inserted and coupled to the concave portion of the heat insulating panel assembly. The method according to claim 1,
The lower insulation panel assembly includes a lower insulation panel and a lower reinforcement panel laminated on the upper part of the lower insulation panel,
And the panel connecting unit is inserted and coupled to the lower reinforcement panel. 3. The method of claim 2,
Wherein a protrusion of the panel connecting unit is provided on a side surface of the panel connecting unit,
And the panel connecting unit is inserted into the recessed portion of the lower reinforcement panel. The method of claim 3,
Wherein the panel connecting unit has a trapezoidal cross section. 3. The method of claim 2,
A protrusion of the panel connecting unit is provided on a lower surface of the panel connecting unit,
And the projecting portion of the panel connecting unit is press-fitted into the recessed portion of the lower reinforcement panel in an interference fit manner. 6. The method according to any one of claims 1 to 5,
The panel connecting unit
And a fixture installed in a fixture mounting groove provided on a side surface of the panel connecting unit,
Wherein the fixing member includes a protruding member protruding outwardly from a side surface of the panel connecting unit and an elastic member provided between an inner surface of the fixing member mounting groove and the protruding member to provide an elastic force to the protruding member,
And the panel connecting unit is fixed to the lower heat insulating panel assembly by engaging the protruding member in the fixing member latching groove provided in the recessed portion of the lower reinforcing panel.
KR1020150149395A 2015-10-27 2015-10-27 Cargo for liquefied gas KR101824428B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210000895A (en) * 2019-06-26 2021-01-06 대우조선해양 주식회사 Connection Bridge Structure between Insulating Panels of Liquefied Natural Gas Storage Tank

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Publication number Priority date Publication date Assignee Title
KR102432445B1 (en) * 2018-07-04 2022-08-16 대우조선해양 주식회사 Insulation panel
KR102432728B1 (en) * 2018-07-04 2022-08-16 대우조선해양 주식회사 Insulation panel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210000895A (en) * 2019-06-26 2021-01-06 대우조선해양 주식회사 Connection Bridge Structure between Insulating Panels of Liquefied Natural Gas Storage Tank

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