KR101784835B1 - Cargo for liquefied gas and fixing unit for paner used therein - Google Patents

Cargo for liquefied gas and fixing unit for paner used therein Download PDF

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Publication number
KR101784835B1
KR101784835B1 KR1020150140213A KR20150140213A KR101784835B1 KR 101784835 B1 KR101784835 B1 KR 101784835B1 KR 1020150140213 A KR1020150140213 A KR 1020150140213A KR 20150140213 A KR20150140213 A KR 20150140213A KR 101784835 B1 KR101784835 B1 KR 101784835B1
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KR
South Korea
Prior art keywords
arm plate
insulating panel
panel
panel assembly
auxiliary barrier
Prior art date
Application number
KR1020150140213A
Other languages
Korean (ko)
Other versions
KR20170040935A (en
Inventor
박성호
조성인
방창선
Original Assignee
삼성중공업 주식회사
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Priority to KR1020150140213A priority Critical patent/KR101784835B1/en
Publication of KR20170040935A publication Critical patent/KR20170040935A/en
Application granted granted Critical
Publication of KR101784835B1 publication Critical patent/KR101784835B1/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
    • B65D90/023—Modular panels
    • B65D90/026—Parallel slats
    • 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
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/228—Assembling processes by screws, bolts or rivets
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Disclosed is a liquefied gas holding window including a two-layered insulating panel assembly and a panel fixing unit used therein. The liquefied gas holding window according to the embodiment of the present invention includes a main wall surrounding the accommodating space of the liquefied gas and an insulated panel assembly surrounding the main wall and insulated from the outside of the liquefied gas, An auxiliary barrier disposed on the lower insulating panel assembly and sealing the lower insulating panel assembly; an upper insulating panel assembly stacked on the auxiliary barrier; and a panel fixing unit for fixing the lower insulating panel assembly and the upper insulating panel assembly. The panel fixing unit includes a body having a stud bolt fixed to the upper surface of the lower insulating panel assembly, a body having an insertion hole for receiving the stud bolt, a rotatably coupled body, And an arm plate for pressing and fixing.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquefied gas holding window,

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

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.

Korean Patent Laid-Open Publication No. 10-2012-0013233 (Feb. 14, 2012) discloses a liquefied natural gas storage tank and a manufacturing method thereof.

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

An embodiment of the present invention is to provide a liquefied gas holding window in which the process of mechanically coupling and fixing the upper insulating panel to the lower insulating panel is convenient.

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 bottom insulating panel assembly, an auxiliary barrier disposed on the bottom insulating panel assembly and sealing the bottom insulating panel assembly, an upper insulating panel assembly stacked on the auxiliary wall, and a lower insulating panel assembly, The panel fixing unit includes a stud bolt fixed to an upper surface of the lower heat insulating panel assembly, a body portion having an insertion hole for receiving the stud bolt, Rotatably coupled and rotates downward to move the upper insulating panel assembly There is a liquefied gas storage tank that contains the cancer plate for fixing can be provided.

The lower insulation panel assembly may include a lower insulation panel, a lower reinforcement panel stacked on the lower insulation panel, and an auxiliary barrier connection member coupled to an upper portion of the lower reinforcement panel and welded to the auxiliary barrier, The stud bolt may be fixed to the auxiliary barrier connecting member.

The upper insulating panel assembly may include an upper insulating panel and an upper reinforcing panel laminated on the lower portion of the upper insulating panel, and the arm plate may press the upper reinforcing panel.

In addition, the arm plate may be prevented from rotating upward by restricting the arm plate to the body when the arm plate is rotated downward and downward over a certain range.

Further, if the arm plate rotates downward and goes down a certain range or less, the arm plate may be constrained to the body part by interference fit with the body part.

The fixing device may further include a fixing member coupled to the stud bolt and configured to press and fix the arm plate in a state where the arm plate is rotated and disposed in parallel with the upper reinforcing panel.

The upper insulating panel is formed with a groove along the height direction so as to insert the arm plate, and the groove is larger than a rotation radius of the arm plate in the height direction, allowing the rotation of the arm plate.

In addition, the arm plates may be provided in a plurality of corresponding to the plurality of adjacent upper insulating panel assemblies, and the plurality of arm plates may press-fix the plurality of upper insulating panel assemblies, respectively.

According to another aspect of the present invention, there is provided a floor panel comprising: a body portion having an insertion hole for receiving a stud bolt fixed to an upper surface of a lower insulating panel assembly; a rotatably coupled body portion, A panel fixing unit including an arm plate for press-fixing the assembly may be provided.

In addition, the arm plates may be provided in a plurality of corresponding to the plurality of adjacent upper insulating panel assemblies, and the plurality of arm plates may press-fix the plurality of upper insulating panel assemblies, respectively.

The apparatus may further include a fixing member coupled to the stud bolt and configured to press and fix the arm plate in a state in which the arm plate rotates downward.

Further, if the arm plate rotates downward and goes down a certain range or less, the arm plate may be constrained to the body part by interference fit with the body part.

The elastic plate may further include an elastic member for providing an elastic force in a direction to push the arm plate upward.

The liquefied gas holding window according to the embodiment of the present invention performs a process of mechanically coupling and fixing an upper heat insulating panel to a lower heat insulating panel without using a separate jig for fixing a plurality of upper heat insulating panels, It is possible to fix the plurality of upper heat insulating panels in turn using only the panel fixing unit, which simplifies the process and reduces the process time.

1 is a perspective view of a partially assembled liquefied gas holding window according to an embodiment of the present invention.
2 is a cross-sectional view showing the structure of a liquefied gas holding window according to an embodiment of the present invention.
FIG. 3 is an enlarged perspective view showing a state where the two upper insulating panels meet. FIG.
4 is a cross-sectional view of Fig.
5 is a perspective view showing a state before installation of the panel fixing unit according to an embodiment of the present invention.
FIG. 6 is a perspective view showing a state after installation of a panel fixing unit according to an embodiment of the present invention. FIG.
7 is an exploded perspective view of Fig.

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.

The liquefied gas holding window according to an embodiment of the present invention can be 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 partially assembled perspective view illustrating a structure of a liquefied gas holding window according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating a structure of a liquefied gas holding window according to an embodiment of the present invention.

Referring to the drawings, the liquefied gas holding window surrounds a space capable of accommodating the liquefied gas, and includes a main wall 50 in direct contact with the liquefied gas, a heat insulating panel 50 surrounding the main wall 50, Assembly, and an outer wall 10 that surrounds and firmly supports the insulating panel assembly.

The kitchen wall 50 is for sealing the storage space in which the storage fluid is received, and requires airtightness (or watertightness). 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 50 penetrates due to such an increase in pressure or the like, the liquid or gaseous liquefied gas can be introduced into the insulating panel assembly. 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.

Metal material such as an invar alloy (INVAR), stainless steel (SUS), or an aluminum alloy can be used to maintain the physical and chemical conditions of the kitchen wall 50 even at a low temperature. The kitchen wall 50 may be formed by connecting a plurality of kitchen wall 50 sheets and may be welded to each other to maintain airtightness.

As a method of welding the kitchen wall 50, 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 50 is in direct contact with the cryogenic storage fluid, it is exposed to rapid contraction and expansion. The kitchen wall 50 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 50 includes a corrugation 51 to have an in-plane stiffness. The corrugated portion 51 is elastically deformed in shape corresponding to the thermal stress, thereby reducing the thermal stress at the welded portion.

The kitchen wall 50 includes first and second wrinkles 51-1 and 51-2 arranged in different directions and an intersection 52 at which the two wrinkles 51 intersect . The thermal stress acting in the in-plane direction of the kitchen wall 50 can be solved by the two-directional wrinkles 51. That is, the thermal stress acting in the longitudinal direction of the first wrinkled portion 51-1 is canceled by the elasticity of the second wrinkled portion 51-2, and the thermal stress acting in the longitudinal direction of the second wrinkled portion 51-2 Can be solved by the stretchability of the first wrinkled portion 51-1.

Although the two-directional wrinkles 51 are vertically arranged in the figure, 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 heat insulating panel assembly includes an insulating panel assembly installed on a plane portion and an insulating panel assembly installed on a corner portion. 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 assembly provided on the flat surface will be described as a basis.

The heat insulating panels 20 and 30 can be generally made of a material having excellent heat insulation performance and light weight such as polyurethane foam (PUF) or reinforced polyurethane foam (R-PUF, Reinforced PUF) It can be kept at an ultra-low temperature state by being insulated from the outside. The heat insulating panel assembly generally has a double insulation structure including the upper heat insulating panel 30 and the lower heat insulating panel 20 for the purpose of improving the heat insulating performance and facilitating the repair.

An inner hull can be used for the outer wall 10 and supports the load of the storage fluid. The lower insulation panel 20 may be fixed to the outer wall 10.

The lower first reinforcing panel 21 may be coupled to the bottom surface so that the lower heat insulating panel 20 can be firmly fixed to the outer wall 10. [ The lower first reinforcing panel 21 may be made of plywood or the like and may be attached to the bottom surface of the lower insulating panel 20 using an adhesive such as an epoxy glue or the like.

The lower heat insulating panel 20 may be fixed to the outer wall 10 via a lower first reinforcing panel 21 adhered to the bottom surface. The outer wall 10 may be welded with a stud bolt 12 for joining the lower insulating panel 20. Through holes 20a and 21a are formed in the lower heat insulating panel 20 and the lower first reinforcing panel 21 so that the stud bolts 12 can pass therethrough. The diameter of the through hole 21a formed in the lower first reinforcing panel 21 may be smaller than the diameter of the through hole 20a formed in the lower heat insulating panel 20. [

The stud bolt 12 is inserted into the through hole 20a formed in the corner of the lower heat insulating panel 20 and is engaged with the nut and the nut is engaged with the stud bolt 12 to thereby connect the lower first reinforcing panel 21 Restraint. As a result, the lower heat insulating panel 20 to which the lower first reinforcing panel 21 is attached is joined to the outer wall 10. At this time, the foam plug 20b may be inserted into the through hole 20a to maintain the heat insulating performance.

A mastic 11 having an adhesive force and / or a level pad 13 for adjusting a level difference may be interposed between the lower first reinforcing panel 21 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 20 and alleviate the impact transmitted to each other.

The plurality of lower insulating panels 20 may be disposed adjacent to each other, and may be arranged in a lattice pattern, for example. The arrangement in the form of a lattice means that the lower insulating panels 20 are disposed not only adjacent to each other in the first direction but also adjacent to each other in the second direction.

And the lower joint 23 can be inserted between the adjacent lower heat insulating panels 20. The lower joint 23 may be a heat insulating material capable of filling a gap between the lower heat insulating panels 20, and a glass wool or the like may be used. The lower joint 23 may be inserted after the lower insulating panel 20 is installed or attached to the side of the lower insulating panel 20.

And the lower second reinforcing panel 22 may be coupled to the lower insulating panel 20 so that the auxiliary barrier 40 can be fixed. The lower second reinforcing panel 22 may be made of plywood or the like and may be attached to the upper surface of the lower heat insulating panel 20 using an adhesive such as epoxy glue. The auxiliary barrier 40 may be connected to the auxiliary barrier connection member 24 by welding or the like and fixed to the lower second reinforcement panel 22.

The insulating panel assembly may include an auxiliary barrier 40 interposed between the upper insulating panel 30 and the lower insulating panel 20. The auxiliary barrier 40 protects the lower insulation panel 20 when the kitchen wall 50 is infiltrated, thereby greatly reducing the time and cost required for the repair.

The auxiliary barrier 40 may be formed of a metal material such as an INVAR, stainless steel or aluminum alloy as in the case of the kitchen wall 50 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 joining the auxiliary barrier 40 to the lower heat insulating panel 20. [ Although not shown in the drawing, in the adhesive type manufacturing method, a rigid triplex is attached by using an adhesive such as epoxy glue on the lower insulating panel 20, and the adjacent rigid triplex is connected with 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 an embodiment of the present invention is a welded manufacturing method in which adjacent auxiliary walls 40 are welded together. The welding method is such that the auxiliary barrier 40 is mechanically coupled instead of bonding to the lower insulating panel 20 and the upper insulating panel 30 is also bonded to the lower insulating panel 20 20).

The secondary barrier 40 may include a corrugation 41 to have an in-plane stiffness. The corrugated portion 41 is elastically deformed in shape corresponding to the thermal stress, thereby reducing the thermal stress at the welded portion. The corrugated portion 41 may be formed by a press method or the like.

The auxiliary barrier 40 includes first and second wrinkled portions 41-1 and 41-2 arranged in different directions and an intersection portion 42 where the two wrinkled portions 41 intersect with each other . The thermal stress acting in the in-plane direction of the auxiliary barrier 40 can be relieved by the two-directional folds 41. [ That is, the thermal stress acting in the longitudinal direction of the first wrinkled portion 41-1 is canceled by the elasticity of the second wrinkled portion 41-2, and the thermal stress acting in the longitudinal direction of the second wrinkled portion 41-2 Can be solved by the stretchability of the first wrinkled portion 411-.

Although the two-sided wrinkle portions 41 are shown vertically, 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 corrugated portion 41 provided on the auxiliary barrier 40 can be convex downward toward the lower heat insulating panel 20. [ At this time, the lower second reinforcing panel 22 is provided with a groove for receiving the corrugation 41 of the auxiliary barrier 40, so that interference with the corrugation 41 can be avoided. The groove may be formed on the upper surface of the lower second reinforcing panel 22 or may be formed to penetrate the lower second reinforcing panel 22.

The auxiliary barrier 40 sheet may be provided so as to extend across the plurality of lower insulating panels 20. [ The meaning of being laid over the lower insulating panel 20 includes the case of completely covering and the case of covering only partly. For example, in FIG. 1, it is shown that one auxiliary barrier 40 sheet is provided over four lower insulating panels 20.

The auxiliary barrier 40 may be fixed to the auxiliary barrier connecting member 24 provided on the upper portion of the lower heat insulating panel 20. [ Particularly, when the lower second reinforcing panel 22 is provided, the auxiliary barrier connecting member 24 can be coupled to the lower second reinforcing panel 22. The auxiliary barrier connecting member 24 may be mechanically coupled to the lower second reinforcing panel 22 by means of a rivet 24a or the like and may be made of a metal such as SUS and welded to the auxiliary barrier 40. The auxiliary barrier connecting member 24 may be received in the groove 22a formed in the lower second reinforcing panel 22 and may not protrude from the upper surface of the lower second reinforcing panel 22. [

In addition, the auxiliary barrier connecting members 24 may be provided in a strip shape and may be arranged in different directions to form intersections. For example, two strips orthogonal to each other. The auxiliary barrier connecting member 24 may be disposed parallel to the edge of the lower insulating panel 20. [ In addition, the auxiliary barrier connecting member 24 may be provided in one strip or may be provided such that a plurality of strips are continuously connected.

A plurality of auxiliary barrier connecting members 24 are formed so that adjacent auxiliary barrier connecting members 24 are connected (including those connected by a virtual extension line without being directly connected) to form one closed figure. For example, it is shown that four lower insulating panels 20 are disposed adjacent to each other, and a rectangular closed form is formed by the auxiliary barrier connecting member 24 provided on the lower insulating panel 20.

One auxiliary barrier 40 sheet constituting the auxiliary barrier 40 may have a shape corresponding to the shape of the closed figure formed by the auxiliary barrier connecting member 24. [ The corners of the sheets of the secondary barrier 40 may be arranged and fixed so as to overlap the secondary barrier connecting members 24, respectively. In one example, the sheet of secondary barrier 40 may be secured to the secondary barrier connecting member 24 in a tack welding manner.

Next, the process of installing the auxiliary barrier 40 after the lower insulating panel 20 is installed will be described.

The auxiliary barrier 40 may be formed by fixing one auxiliary barrier 40 sheet and then fixing another auxiliary barrier 40 sheet on one adjacent side. At this time, at least one corner of the edge of the auxiliary barrier 40 sheet adjacent to the auxiliary barrier 40 sheet is arranged to overlap with the sheet of the auxiliary barrier 40 previously provided, and the other edge is disposed on the auxiliary barrier connection member 24 As shown in FIG. For example, the fixing of the auxiliary barrier 40 sheet and the auxiliary barrier 40 sheet and the securing of the auxiliary barrier 40 sheet and the auxiliary barrier connection member 24 can be performed using a tack welding method.

The above installation process is continuously performed to fix all the sheets of the auxiliary barrier 40 on the lower insulating panel 20. [ However, since it is still in a state of being in a state of being in contact with the gap between the adjoining auxiliary barrier 40 sheets, it is necessary to perform the main welding in order to maintain airtightness.

Both edges of the sheets of the auxiliary barrier wall 40 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 connecting member 24 can be prevented from being deformed by the welding heat due to the welding heat (or welding seam) when the adjacent auxiliary barrier walls 40 are welded to each other . It is possible to prevent deformation of the auxiliary barrier 40 sheet, which may be caused by high temperature, particularly when plasma welding is used. At this time, in the process of overlap welding or butt welding of the sheets of the auxiliary barrier 40, the welding heat is transmitted to the auxiliary barrier connecting member 24, and the auxiliary barrier connecting member 24 and the auxiliary barrier 40, The sheets may be welded together.

The main welding of the auxiliary barrier 40 sheet and the auxiliary barrier 40 sheet can use an automatic welding device. In particular, welding of the corrugations of the auxiliary barrier 40 can also be performed using an automatic welding apparatus. At this time, in order to manually weld the worker to weld the sheets of the auxiliary barrier 40 and the auxiliary barrier 40 of thin thickness, 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 20. [ The pick-up jig can be coupled to the stud bolt protruding on the auxiliary barrier connecting member 24 or fixed on the auxiliary barrier 40 sheet by adsorption.

The worker can close the sheets of the auxiliary barrier 40 by pressing the sheet of the auxiliary barrier 40 covering the upper part with the use of the pick-up jig or by raising the sheet of the auxiliary barrier 40 which is placed below. At this time, in order to raise the sheet of the auxiliary barrier wall 40 placed below, an adsorption method and a bonding method can be used.

Usually, after the sheet of the auxiliary barrier 40 is wiped, the abutting is performed to fix the sheets of the auxiliary barrier 40 to each other. The sheets of auxiliary barrier 40 secured to each other are easily weldable by automatic welding equipment. 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 insulating panel 20. [ Therefore, in order to use the automatic welding device, it is necessary to fix the rail around the welding line.

The method of manufacturing a liquefied gas holding window according to an embodiment of the present invention uses a stud bolt provided on an auxiliary barrier connecting member 24 for fixing the lower insulating panel 20 and the upper insulating panel 30 to form a rail It can be fixedly installed. That is, the rails of the automatic welding apparatus can be fixedly coupled to the stud bolts installed on the auxiliary barrier connecting member 24. [

Next, a method of welding the sheet of the auxiliary barrier 40 using the automatic welding apparatus will be described.

It has been described that the sheet of the auxiliary barrier 40 is previously contacted to the auxiliary barrier connecting member 24 and the adjoining auxiliary barrier 40 sheets are contacted and fixed to each other. Now, by performing the main weld along a line (weld line) where the sheets of the two auxiliary walls 40 overlap or abut, the installation of the auxiliary barrier is completed. A rail can be installed near the weld line so that the automatic welding device can move along the weld line. In this case, when the rail and the weld line are provided in parallel, the welding quality can be improved and the working time can be shortened.

The rails can be fixed to a plurality of stud bolts arranged in one direction and installed parallel to the weld line. After automatic welding is completed, the rail is disassembled from the stud bolt.

When welding of the auxiliary barrier 40 is completed, it is checked whether the airtightness is secured. As the inspection process, a method of injecting a test gas between the auxiliary barrier 40 and the lower insulating panel 20 and checking whether the test gas leaks to the outside can be used. If the inspection gas is detected from the outside as an inspection result, it is judged that the welding condition of the part is defective and re-welding is performed. On the other hand, if it is determined that the airtightness is ensured, the process for installing the upper insulating panel 30 proceeds to the next step.

Fig. 3 is an enlarged perspective view showing a state of engagement at a portion where two upper insulating panels 30 meet, and Fig. 4 is a sectional view of Fig.

3 and 4, the upper insulating panel 30 can be mechanically coupled to the lower insulating panel 20. As shown in FIG. For example, the upper insulating panel 30 may be combined with the panel fixing unit 100 fixed to the lower heat insulating panel 20. [

The panel fixing unit 100 includes a coupling part 110 coupled to the lower second reinforcing panel 22, a protruding member 120 connected to the coupling part 110 and protruding toward the upper heat insulating panel 30, A body 130 coupled to the protruding member 120 and an arm plate 140 rotatably coupled to the body 130 to press the upper first reinforcing panel 31.

The engaging portion 110 may be mechanically coupled to the lower second reinforcing panel 22 by a rivet or the like. The engaging portion 110 may be received in the groove 22b formed in the lower second reinforcing panel 22 and may not protrude from the upper surface of the lower second reinforcing panel 22. [ The coupling part 110 may be made of a metal such as SUS and welded to the auxiliary barrier 40.

The protruding member 120 may be a stud bolt fixed to the engaging portion 110. In one example, the protruding member 120 may be welded to the coupling portion 110. Or the protruding member 120 may be screwed to the coupling portion 110. The protruding member 120 may be formed with a thread on the lower end of the protruding member 120 and a corresponding groove and threaded portion on the coupling portion 110. [

Meanwhile, the coupling portion 110 of the panel fixing unit 100 may be formed integrally with the auxiliary barrier connection member 24. In this case, the protruding members 120 of the panel fixing unit 100 can protrude from the boundary of the adjoining auxiliary barrier 40 without passing through the auxiliary barrier 40.

A groove 40a can be formed at the corner of the seat of the auxiliary barrier 40 to receive the projecting member 120 of the panel fixing unit 100. [ The adjoining auxiliary barrier 40 sheets can be welded together in a superposed state. At this time, the protruding member 120 may protrude between the grooves 40a of the sheets of the auxiliary barrier 40 overlapping each other.

The panel fixing unit 100 may include a body 130 coupled to the protruding member 120 and an arm plate 140 rotatably coupled to the body 130.

The arm plate 140 may be rotated downward to press-fix the upper first reinforcing panel 31. To this end, the arm plate 140 may be prevented from rotating upward by restricting the arm plate 140 to the body portion 130 in a state where the arm plate 140 rotates downward and goes down over a certain range.

The arm plates 140 are provided in a number corresponding to the number of the adjacent upper heat insulating panels 30 and each arm plate 140 may be provided to press one upper first reinforcing panel 31 have. For example, the panel fixing unit 100 installed between two upper insulating panels 30, which are disposed so as to face each other, is provided with two arm plates 140 at positions opposite to both sides of the body part 130 , And each arm plate 140 fixes the upper heat insulating panel 30. However, the panel fixing unit 100 installed between the four upper insulating panels 30 installed vertically to each other may include four arm plates 140 positioned on the four sides of the body 130 .

5 is a perspective view showing a state before installation of the panel fixing unit 100 according to an embodiment of the present invention. 6 is a perspective view showing a state after installation of the panel fixing unit 100 according to an embodiment of the present invention, and FIG. 7 is an exploded perspective view of FIG.

The panel fixing unit 100 will be described in more detail with reference to FIGS. 5 to 7. FIG.

The panel fixing unit 100 includes a protruding member 120 fixed to a coupling portion 110 integrally formed with the auxiliary barrier connecting member 24, a body portion 130 coupled with the protruding member 120, And a plurality of arm plates 140 that are rotatably coupled to the first upper reinforcement panel 31 to fix the upper first reinforcement panel 31.

The body part 130 may be formed with an insertion hole 131 for receiving the protrusion member 120. The body portion 130 may be fixed to the protruding member 120. For example, the body portion 130 may be screwed to a protruding member 120 provided with a stud bolt.

The body portion 130 may include a rotation axis support portion 132 for supporting the rotation axis 144 of the arm plate 140. The rotary shaft support portions 132 are provided on one side of the body portion 130 and the arm plate 140 is received between the two rotary shaft support portions 132. The amount of the rotary shaft 144 of the arm plate 140 May be supported on the inner side of the rotary shaft support part 132, respectively.

The arm plate 140 can be coupled to the body portion 130 so as to rotate in the vertical direction. In one example, the rotation axis 144 of the arm plate 140 may be disposed parallel to the auxiliary barrier 40. That is, the arm plate 140 may be disposed in parallel with the longitudinal direction of the protruding member 120 in a state rotated upward, and may be disposed in parallel with the auxiliary wall 40 in a state rotated downward.

The arm plate 140 includes an elastic portion 141 rotatably coupled to the body portion 130 and extending in one direction, a pressing portion 143 connected to the elastic portion 141 so as to have a step, And a connecting portion 142 connecting the pressing portion 143 and the pressing portion 143 and including a bent portion.

The arm plate 140 is formed such that the pressing portion 143 for pressing the upper first reinforcing panel 31 and the elastic portion 141 connected to the body portion 130 have stepped portions, The elastic portion 141 and the connecting portion 142 may be deformed in the process of coupling the fixing member 150 to the fixing member 150. [

The panel fixing unit 100 may further include an elastic member 133 for applying an elastic force to the arm plate 140. The elastic member 133 can provide an elastic force in a direction to lift the arm plate 140 upward. For example, the elastic member 133 may be a coil spring installed on the rotary shaft 144. One end of the coil spring may be supported on the bottom surface of the arm plate 140 and the other end may be supported on the bottom surface of the body portion 130. [

The panel fixing unit 100 may further include a rotation restraining unit that fixes the arm plate 140 when the arm plate 140 rotates downward and falls over a certain range. For example, the rotation restricting portion may include a protrusion 145 protruding from the outer surface of the arm plate 140, and a groove 134 formed in the inner surface of the rotation axis supporting portion 132. The arm plate 140 rotates downward and the protrusion 145 protruding from the outer surface is inserted into the groove 134 formed in the rotary shaft support 132 by interference fit. The arm plate 140 is not rotated upward in spite of the elastic force of the elastic member 133. [

The panel fixing unit 100 may further include a fixing member 150 that is fixed to the protruding member 120 and presses and fixes the arm plate 140. The fixing member 150 may be formed with an insertion hole 151 for receiving the protruding member 120. The fixing member 150 may be fixed to the protruding member 120. For example, the fixing member 150 may be screwed to the protruding member 120 provided with a stud bolt.

The fixing member 150 can support the upper surface of the arm plate 140. That is, the fixing member 150 is engaged with the protruding member 120 and downward to restrain the arm plate 140. The arm plate 140 is not rotated upward in spite of the elastic force of the elastic member 133. [

Next, a case where a plurality of arm plates 140 are not separately provided as in the panel fixing unit 100 according to the embodiment of the present invention will be described in comparison.

When the upper heat insulating panel 30 is installed on the bottom surface of the cargo hold, it is possible to press them using the arm plate 140 integrally provided after the plurality of upper first reinforcing panels 31 are disposed. However, when the upper insulating panel 30 is installed on the side wall or the ceiling of the cargo hold, the upper insulating panels 30 are fixed before the plurality of upper insulating panels 30 are fixed using the arm plate 140 A separate jig should be used. This is because the plurality of upper insulating panels 30 are not arranged at the same time but are arranged sequentially.

However, the panel fixing unit 100 according to the embodiment of the present invention can perform a process of installing a plurality of upper heat insulating panels 30 by using one panel fixing unit 100. Therefore, it is possible to omit a separate jig using process for fixing the upper insulating panel 30, which simplifies the process and shortens the process time.

A process of installing the upper insulating panels 30 using the panel fixing unit 100 according to the embodiment of the present invention will be described.

First, the body portion 130 is installed so that the protruding member 120 passes through the insertion hole 131 of the body portion 130. At this time, two arm plates 140 are coupled to the body portion 130 at the side where the two upper insulating panels 30 are disposed so as to face each other, and the side or vertexes of three or more upper insulating panels 30 The arm plates 140 as many as the number of the upper insulating panels 30 can be coupled to the body portion 130. [

Thereafter, one upper insulating panel 30 is disposed. The arm plates 140 rotatably coupled to the body portion 130 are rotated upward to be held in proximity to the protruding members 120. Therefore, the upper first reinforcing panel 31 attached to the lower portion of the upper insulating panel 30 may not interfere with the upper first reinforcing panel 31. After the upper insulating panel 30 is disposed, one arm plate 140 is rotated downward to be disposed on the upper first reinforcing panel 31, and the projections 145 of the arm plate 140 are disposed on the upper surface of the rotary shaft support (130) of the upper panel (132) while restraining the upper insulating panel (30).

The other upper arm panel 140 is rotated downward to place the upper arm panel 140 on the upper first reinforcing panel 31 and the protrusions 145 of the arm plate 140 are disposed on the upper first arm panel 140. [ Is constrained to the groove 134 of the rotary shaft support part 132 to constrain the adjacent upper heat insulation panel 30. [

If the four upper insulation panels 30 meet each other, the above process can be repeated using the first arm plate 140.

After all the upper insulating panels 30 are disposed, the fixing member 150 is engaged to prevent the arm plate 140 from rotating in the upward direction by the elastic force of the elastic member 133 or the external force. Or the arm plate 140 and the body portion 130 may be welded together to form an integral body.

The plurality of upper insulating panels 30 may be disposed adjacent to each other, and may be arranged in a lattice pattern, for example. It is meant that the upper insulating panels 30 are disposed adjacent to each other in the second direction as well as disposed adjacent to each other in the first direction.

An upper joint (not shown) may be inserted between the adjacent upper heat insulating panels 12. The upper joint may be a heat insulating material capable of filling a gap between the upper insulating panels 30, and glass wool or the like may be used. The upper joint may be inserted after the upper insulating panel 30 is installed, or may be installed attached to the side of the upper insulating panel 30.

The upper first reinforcing panel 31 may be coupled to the bottom surface so that the upper insulating panel 30 can be firmly fixed to the lower heat insulating panel 20. [ The upper first reinforcing panel 31 may be made of plywood or the like and attached to the bottom surface of the upper insulating panel 30 using an adhesive such as epoxy glue.

Adjacent upper insulating panels 30 may be disposed with the panel fixing unit 100 therebetween. That is, one panel fixing unit 100 can fix a plurality of upper heat insulating panels 30 at the same time. 3, the panel fixing unit 100 installed at the boundary between the vertexes and the vertexes of the four upper insulating panels 30 fixes the four upper insulating panels 30 at the same time. Further, the panel fixing unit 100 installed at the boundary between the vertexes and the vertexes of the three upper insulating panels 30 simultaneously fixes the upper three upper insulating panels 30.

The arm plate 140 of the panel fixing unit 100 is positioned on the upper first reinforcing panel 31 and presses the arm plate 140 by coupling the fixing member 150 to the projection member 120, (140) restrains the upper first reinforcing panel (31). As a result, the panel fixing unit 100 can fix the upper insulating panel 30 fixed to the upper first reinforcing panel 31 by adhesion to the lower insulating panel 20.

Meanwhile, the upper insulating panel 30 may have a groove 30a extending in the height direction in a region that interferes with the panel fixing unit 100. An upper first reinforcing panel 31 is formed on the bottom of the groove 30a formed in the upper insulating panel 30 to form a pressing surface 31a to which the panel fixing unit 100 presses.

At this time, the groove 30a formed in the upper insulating panel 30 may be formed to be larger than the radius of rotation of the arm plate 140 provided to be rotatable in the up-down direction. For example, the groove 30a formed in the upper insulating panel 30 may be a part of a cylindrical shape. Therefore, the upper insulating panel 30 may be disposed after the panel fixing unit 100 is installed, and the arm plate 140 may be rotated on the pressing surface 31a of the upper first reinforcing panel 31 .

In order to maintain the heat insulating performance of the upper insulating panel 30, the foam plug 30b may be inserted into a space formed by the grooves 30a formed in the adjacent upper insulating panel 30. [

An upper second reinforcing panel 32 may be laminated on the top of the upper insulating panel 30 for installing the kitchen wall 50. The upper second reinforcing panel 32 may be made of plywood or the like and may be attached to the upper insulating panel 30 using an adhesive such as an epoxy glue or the like.

The upper wall of the upper insulating panel 12 may be provided with a kitchen wall connecting member 34. In particular, when the upper second reinforcing panel 32 is provided, the main body wall connecting member 34 can be coupled to the upper surface of the upper second reinforcing panel 32. The kitchen wall connecting member 34 is made of a metal such as SUS and can be welded to the kitchen wall 50 and mechanically coupled to the upper second reinforcing panel 32 by a rivet 34a or the like. The main body wall connecting member 34 may be received in the groove 32a formed in the upper second reinforcing panel 32 and may not protrude from the upper surface of the upper second reinforcing panel 32. [

In addition, the kitchen wall connecting members 34 may be provided in a strip shape and may be arranged in different directions to form intersections. For example, two strips orthogonal to each other. The kitchen wall connecting member 34 may be provided parallel to the edge of the facing upper insulating panel 30. In addition, the kitchen wall connecting member 34 may be provided in one strip or may be provided so that a plurality of strips are continuously connected.

A barrier wall member 35 for installing the kitchen wall 50 may be provided on the upper portion of the upper insulating panel 30. In particular, when the kitchen wall connecting member 34 is provided, the wall mounting member 35 may be provided on the upper portion of the kitchen wall connecting member 34.

It has been described that rails must be provided to weld the seat of the secondary barrier 40 by using the automatic welding apparatus and rails can be installed on the stud bolts installed on the secondary barrier connecting member 24. [ Similarly, in order to weld a sheet of the kitchen wall 50 using an automatic welding apparatus, a barrier mounting member 35 capable of mounting a rail is required.

The barrier mounting member 35 may be a stud bolt provided at an intersection where the two-directional main body wall connecting members 34 are perpendicular to each other. The barrier mounting member 35 may be welded on the wall wall connecting member 34. [ The intersection where the two-way wall wall connecting member 34 provided with the barrier mounting member 35 meets may be a four-sheet intersection where four sheets of the kitchen wall 50 meet. The four sheets of the kitchen wall 50 may be welded around the barrier mounting member 35 when it is chamfered at the corner of the sheet of the kitchen wall 50 and may not interfere with the barrier mounting member 35. At this time, the corner portion of the seat of the kitchen wall 50 should be welded to the kitchen wall connecting member 34 to maintain airtightness.

The barrier mounting member 35 is for mounting the kitchen wall 50 and can be removed when the installation of the kitchen wall 50 is completed. This is because the operator can be treated as an obstacle when moving.

Next, the process of installing the kitchen wall 50 will be described.

The main body wall connecting member 34 is connected to the adjacent main body wall connecting member 34 (including those connected by a virtual extension line without being directly connected thereto) to form one closed figure. In the figure, four upper insulating panels 30 are arranged adjacent to each other and a rectangular closed shape is formed by a kitchen wall connecting member 34 provided on the upper heat insulating panel 30. [

One sheet of the kitchen wall 50 constituting the kitchen wall 50 may be in a shape corresponding to the shape of the closed figure formed by the kitchen wall connecting member 34, Four corners may be disposed and fixed so as to overlap with the respective wall wall connecting members 34. [ In one example, the seat of the kitchen wall 50 may be fixed to the kitchen wall connecting member 34 in a tack welding manner.

After one sheet of the kitchen wall 50 is fixed, another sheet of the kitchen wall 50 can be fixed to the adjacent one side. At this time, the corner of one of the four corners of the pre-installed kitchen wall 50 sheet adjacent to the seat of the kitchen wall 50 is arranged to overlap with the pre-installed kitchen wall 50 sheet and the other three corners are connected to the kitchen wall connecting member 34 ) And can be fixed. The fixing of the seat of the kitchen wall 50 and the fixing of the seat of the kitchen wall 50 and the fixing of the seat wall and the kitchen wall connecting member 34 of the kitchen wall 50 may use a tack welding method.

The above installation process is continuously performed to fix all the sheets of the kitchen wall 50 on the upper heat insulating panel 30. [ However, since it is still in a state of being in contact with the gap between adjacent sheets of the kitchen wall 50, it is necessary to perform this welding in order to maintain airtightness.

Both edges of the adjacent sheet of the kitchen wall 50 are welded by lap welding or butt welding, thereby ensuring airtightness. As a welding method that can be used at this time, a method used for welding the auxiliary barrier can be used, and of course, an automatic welding device can be used.

On the other hand, the kitchen wall connecting member 34 is located below the welding line (or welding seam) when the adjacent sheets of the kitchen wall 50 are welded together, thereby preventing the sheet of the kitchen wall 50 from being deformed by the welding heat . It is possible to prevent deformation of the sheet of the kitchen wall 50, which may be caused by high temperature, particularly when plasma welding is used. At this time, in the process of overlap welding or butt welding of the sheets of the kitchen wall 50, the welding heat is transmitted to the kitchen wall connecting member 34 to connect the lower kitchen wall connecting member 34 and the kitchen wall 50 located thereon, The sheets may be welded together.

The main welding of the kitchen wall 50 sheet and the kitchen wall 50 sheet can utilize automatic welding equipment. In particular, welding of the corrugated portion of the kitchen wall 50 can also use an automatic welding apparatus. At this time, in order to manually weld the worker to weld the sheet of the kitchen wall 50 and the sheet of the kitchen wall 50 with a thin thickness 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.

Since the same method as the process of installing the auxiliary barrier 40 can be used for the work of the fatigue, a detailed description will be omitted. The pick-up jig (not shown) may be fixed to the sheet of the kitchen wall 50 by being engaged with or adsorbing to the barrier-attaching member 35 provided on the kitchen wall connecting member 34.

The automatic welding apparatus performs welding while moving along the rails that are installed to be fixed to the upper insulating panel (30). Therefore, in order to use the automatic welding device, it is necessary to fix the rail around the welding line.

In the method of manufacturing the liquefied gas holding window according to the embodiment of the present invention, the rails can be fixed by using a barrier attachment member 35 (for example, a stud bolt) provided on the kitchen wall connecting member 34.

Next, a method of welding the sheet of the kitchen wall 50 using the automatic welding apparatus will be described.

It has been described that the seat of the kitchen wall 50 is previously touched to the kitchen wall connecting member 34 and the adjacent sheets of the kitchen wall 50 are contacted and fixed to each other. Now, when the main welding is performed along the line (weld line) where the two kitchen wall 50 sheets overlap or abut, the installation of the kitchen wall is completed. A rail can be installed near the weld line so that the automatic welding device can move along the weld line. In this case, when the rail and the weld line are provided in parallel, the welding quality can be improved and the working time can be shortened.

The rail is fixed to a plurality of stud bolts arranged in one direction and installed parallel to the welding line, so that the automatic welding apparatus installed on the rail can facilitate the work of welding along the welding line. After automatic welding is completed, the rail is disassembled from the stud bolt.

When the welding of the kitchen wall 50 is completed, it is checked whether the airtightness is secured. As the inspection process, a method of injecting a test gas between the kitchen wall 50 and the upper heat insulating panel 30 and checking whether the test gas leaks to the outside can be used. If the inspection gas is detected from the outside as an inspection result, it is judged that the welding condition of the part is defective and re-welding is performed.

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: Stud bolt, 13: Level pad
20: lower insulation panel, 20a: through hole,
20b: foam plug, 21: lower first reinforcing panel,
21a: Through hole, 22: Lower second reinforcing panel,
22a, 22b: groove, 23: lower joint,
24: auxiliary barrier connecting member, 24a: rivet,
30: Upper insulation panel, 30a: Through hole,
30b: foam plug, 31: upper first reinforcing panel,
31a: through hole, 32: upper second reinforcing panel,
32a: groove, 33: upper joint,
34: Kitchen wall connecting member, 34a: Rivet,
35: barrier mounting member, 40: auxiliary barrier,
40a: through hole, 41: wrinkle portion,
42: intersection, 50: kitchen wall,
51: wrinkle portion, 52: intersection portion,
100: panel fixing unit, 110: engaging portion,
120: protruding member, 130: body portion,
131: insertion hole, 132: rotary shaft support part,
133: elastic member, 134: groove,
140: arm plate, 141: elastic part,
142: connecting portion, 143: pressing portion,
144: rotation shaft, 145: projection,
150: fixing member, 151: insertion hole.

Claims (13)

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 lower insulating panel assembly, 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, And a panel fixing unit for fixing the upper insulating panel assembly,
The lower insulation panel assembly includes a lower insulation panel, a lower reinforcement panel laminated on the upper portion of the lower insulation panel, and an auxiliary barrier connection member coupled to an upper portion of the lower reinforcement panel and welded to the auxiliary barrier,
The upper insulating panel assembly includes an upper insulating panel and an upper reinforcing panel stacked on a lower portion of the upper insulating panel,
The panel fixing unit includes:
A body portion formed with an insertion hole for receiving the stud bolt, a body portion rotatably coupled to the body portion, and rotated downward to be coupled to the upper heat insulation panel assembly, A fixing member that is coupled to the stud bolt and presses and fixes the arm plate in a state in which the arm plate is rotated and is disposed in parallel with the upper reinforcement panel; And an elastic member for providing an elastic force in the direction of the elastic member,
Wherein the stud bolt is fixed to the auxiliary wall connecting member,
Wherein the arm plate presses the upper reinforcing panel,
The arm plate is prevented from rotating upward due to being constrained to the body when the arm plate is rotated downward and downward over a certain range,
Wherein the upper insulation panel is formed with a groove along a height direction so that the arm plate is inserted therein, the groove being larger than a rotation radius of the arm plate in the height direction, allowing the rotation of the arm plate. delete delete delete The method according to claim 1,
Wherein the arm plate is constrained to the body portion by being forcedly engaged with the body portion when the arm plate rotates downward and falls over a predetermined range. delete delete The method according to claim 1,
Wherein the arm plate is provided in plurality so as to correspond to a plurality of adjacent upper insulating panel assemblies such that the plurality of arm plates press-fit the plurality of upper insulating panel assemblies, respectively. A body portion having an insertion hole for receiving a stud bolt fixed to an upper surface of the lower insulating panel assembly,
An arm plate rotatably coupled to the body portion and rotated downward to press-fix the upper heat insulation panel assembly,
A fixing member coupled to the stud bolt and pressing and fixing the arm plate in a state in which the arm plate is rotated down;
And an elastic member for providing an elastic force in a direction to push the arm plate upward,
Wherein the arm plate is provided in plurality so as to correspond to a plurality of adjacent upper insulating panel assemblies so that each of the plurality of arm plates presses and fixes the plurality of upper insulating panel assemblies,
Wherein the arm plate is constrained to the body part by interference with the body part when the arm plate rotates downward and falls over a certain range. delete delete delete delete
KR1020150140213A 2015-10-06 2015-10-06 Cargo for liquefied gas and fixing unit for paner used therein KR101784835B1 (en)

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