KR101751837B1 - Securing device for lng storage tank - Google Patents

Securing device for lng storage tank Download PDF

Info

Publication number
KR101751837B1
KR101751837B1 KR1020150102993A KR20150102993A KR101751837B1 KR 101751837 B1 KR101751837 B1 KR 101751837B1 KR 1020150102993 A KR1020150102993 A KR 1020150102993A KR 20150102993 A KR20150102993 A KR 20150102993A KR 101751837 B1 KR101751837 B1 KR 101751837B1
Authority
KR
South Korea
Prior art keywords
heat insulating
insulating wall
fixing device
natural gas
liquefied natural
Prior art date
Application number
KR1020150102993A
Other languages
Korean (ko)
Other versions
KR20170011064A (en
Inventor
강봉호
박광준
표창민
Original Assignee
대우조선해양 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 대우조선해양 주식회사 filed Critical 대우조선해양 주식회사
Priority to KR1020150102993A priority Critical patent/KR101751837B1/en
Priority to PCT/KR2016/005968 priority patent/WO2017014426A1/en
Publication of KR20170011064A publication Critical patent/KR20170011064A/en
Application granted granted Critical
Publication of KR101751837B1 publication Critical patent/KR101751837B1/en

Links

Images

Classifications

    • 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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • 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
    • 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
    • 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
    • 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

Landscapes

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

Abstract

A fixing device for a liquefied natural gas storage tank is disclosed. A fixing device for a liquefied natural gas storage tank of the present invention comprises a primary sealing wall contacting the liquefied natural gas and liquid-tightly liquefying the liquefied natural gas; A primary heat insulating wall provided outside the primary sealing wall; And a secondary insulation wall provided on the outer side of the primary insulation wall. The fixing device is provided in the liquefied natural gas storage tank, wherein the primary insulation wall and the secondary insulation wall are fixed to each other. ; And a heat insulating plug arranged to heat a space generated from the upper portion of the heat insulating wall fixing device to the installation of the heat insulating wall fixing device.

Description

TECHNICAL FIELD [0001] The present invention relates to a liquefied natural gas storage tank,

The present invention relates to a fixing device for a liquefied natural gas storage tank, and more particularly to a fixing device for a liquefied natural gas storage tank, which comprises an insulating wall fixing device for fixing a primary heat insulating wall and a secondary heat insulating wall, And a heat insulating plug provided to heat a space generated by the heat insulating plug.

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

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

Liquefied natural gas carriers are equipped with cargo tanks (also called cargo tanks) that can store and store liquefied natural gas that has been liquefied by cooling natural gas. Because the boiling point of liquefied natural gas is about -162 at atmospheric pressure, the liquefied natural gas storage tank is made of materials that can withstand extremely low temperatures such as aluminum steel, stainless steel and 35% nickel steel to safely store and store liquefied natural gas And is designed to be resistant to thermal stress and heat shrinkage, and to prevent heat penetration.

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

 These storage tanks can be classified into independent tanks (independent type) and membrane type (membrane type) depending on whether the load of the cargo directly acts on the insulation. Membrane type storage tanks are GTT NO 96 type and TGZ Mark type. Independent tank type storage tanks include MOSS type and IHI-SPB type.

LNG carrier, etc., the membrane type storage tank is equipped with a heat insulating structure for maintaining the heat insulating property while dispersing the load of the liquefied natural gas. Such a heat insulating structure generally includes a sealing wall contacting the liquefied natural gas and an insulating panel made of Top plywood, bottom plywood, polyurethane foam (RPUF) or the like for heat insulation outside the sealing wall. The overall structure of the insulation panel is a sandwich form with RPUF bonded between the plywood panels.

The heat insulation panel is composed of an upper panel (primary insulation wall) contacting the sealing wall containing the liquefied natural gas and a lower panel (secondary insulation wall) provided on the outside of the upper panel, and fixed between fixing panels do. In order to install such a fixing device, an installation space is required. Since there is no heat insulating panel in this space portion, maintenance of the heat insulation of the cargo hold may be problematic.

The present invention can stably fix the primary and secondary heat insulating walls and maintain the heat insulating property of the liquefied natural gas storage tank in the installation space of the fixing device so as to secure the safety of the ship, And to reduce the cost of production.

According to an aspect of the present invention, there is provided a liquefied natural gas processing apparatus comprising: a primary sealing wall contacting a liquefied natural gas and liquid-tightly liquefying the liquefied natural gas; A primary heat insulating wall provided outside the primary sealing wall; And a secondary insulation wall provided on the outer side of the primary insulation wall. The fixing device is provided in the liquefied natural gas storage tank, wherein the primary insulation wall and the secondary insulation wall are fixed to each other. ; And a heat insulating plug arranged to heat a space generated from the upper portion of the heat insulating wall fixing device to the installation of the heat insulating wall fixing device.

Preferably, the heat insulating plug includes upper and lower plates made of plywood, a heat insulating material provided between the upper and lower plates, a lower cap coupled to the lower end of the lower plate, And the heat insulating plug may have a cylindrical shape in which the head is provided by the upper plate having a larger cross-sectional diameter than the cross-sectional diameter of the lower cap, the lower plate, and the heat insulating material.

Preferably, the upper surface of the head by the upper plate may be provided with a plurality of holes.

Preferably, the upper surface of the head by the upper plate may be provided with a cross-shaped groove capable of providing a circulation path of the gas when the storage tank is purged.

Preferably, the lower cap portion includes a cap portion coupled to a lower end of the lower plate, and a flange portion radially extending from a lower end of the cap portion and coupled to the heat insulating wall fixing device, And the cap portion of the lower cap portion can be inserted and fastened to the hole.

Preferably, the heat insulating wall fixing device includes a stud bolt fixedly coupled to the secondary heat insulating wall, and a nut fastened to the stud bolt, wherein a through hole is formed in the primary heat insulating wall, And the first heat insulating wall is fixed to the secondary heat insulating wall by the heat insulating wall fixing device after being inserted into the through hole and then fastened to the nut.

Preferably, the heat insulating wall fixing device further includes a special washer inserted between the lower plate of the primary heat insulating wall and the nut to prevent the heat insulating wall fixing device from being detached even if the lower plate of the primary heat insulating wall shrinks .

The heat insulating wall fixing device may further include a spring washer interposed between the special washer and the nut to prevent the nut from being released when the lower plate of the primary heat insulating wall shrinks in the height direction.

Preferably, the upper plate of the secondary insulation wall is provided with a strip of a metal material, and the stud bolt may be fixed to the strip.

The heat insulating wall fixing device may further include a spacer provided to surround the outer surface of the nut to disperse the load of the liquefied natural gas.

Preferably, a screw thread is formed on the inner side of the cap portion of the lower cap portion, and the thread is fastened to the upper portion of the stud bolt, so that the heat insulating plug can be coupled to the heat insulating wall fastening device.

The fixing device of the present invention is advantageous in that it is easy to install the plug, the working time can be shortened, and the holding force is strong and stable because the insulating plug is bolted.

FIG. 1 schematically shows a cross-sectional view in which first and second insulating walls are fixed by a fixing device of a liquefied natural gas storage tank according to an embodiment of the present invention.
2 schematically shows a structure of a heat insulating plug in a fixing device according to a first embodiment of the present invention.
3 schematically shows a structure of a heat insulating plug in a fixing device according to a second embodiment of the present invention.

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

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

FIG. 1 schematically shows a cross-sectional view in which first and second heat insulating walls are fixed by a fixing device for a liquefied natural gas storage tank according to an embodiment of the present invention. FIG. 2 is a cross- FIG. 3 schematically shows the structure of the heat insulating plug in the fixing device according to the second embodiment of the present invention.

Since the liquefied natural gas is at a cryogenic temperature of about -163 ° C, the cargo hold in which the liquefied natural gas is stored is provided with a heat insulating structure to block heat input and output. In the case of the membrane type storage tank, it is possible to provide a double insulation wall so as to block heat input / output between the wall and the inner wall of the hull, and a heat insulation structure to provide a hermetic barrier between the upper part of the insulation wall and the insulation wall.

That is, the storage tank provided with the fixing device of this embodiment has a primary sealing wall 10 for contacting the liquefied natural gas with liquid contact with the liquefied natural gas, and a primary heat insulating wall 20 And a secondary heat insulating wall 30 provided outside the primary heat insulating wall.

The primary sealing wall 10 is installed on the primary heat insulating wall and is in contact with the liquefied natural gas and is liquid-tightly stored in the storage tank. The primary sealing wall 10 is liquid- A secondary sealing wall (not shown) for liquid-tight sealing of the liquefied natural gas from the wall may be provided.

The primary sealing wall and the secondary sealing wall may have a corrugated structure (not shown) for preventing shrinkage due to a temperature change and damage during stretching. The wrinkle structure can be elongated or contracted due to the temperature change of the liquefied natural gas according to the line load, thereby preventing breakage due to thermal deformation applied to the primary and secondary sealing walls.

Each of the primary and secondary heat insulating walls 20 and 30 includes upper and lower plate members and a heat insulating material provided between the upper and lower plate members. The upper and lower plate members are made of a plywood material, It may be provided in a polyurethane form. A strip of metal material (not shown) may be provided on the upper surface of the primary insulating wall, and the primary sealing wall may be welded on the strip.

In the liquefied natural gas storage tank of this structure, the fixing device of the present embodiment is provided to maintain the liquid tightness and the heat insulating property while fixing between the primary and secondary heat insulating walls.

As shown in Fig. 1, the present fixing device comprises an insulating wall fixing device 100 for fixing the primary heat insulating wall and the secondary heat insulating wall, and a heat insulating wall fixing device 100 for fixing the heat insulating wall fixing device And a heat insulating plug 200 arranged to heat the space.

The heat insulating wall fixing device 100 includes a stud bolt 110 fixedly coupled to the secondary heat insulating wall, a nut 120 fastened to the stud bolt, and an outer surface of the nut to distribute the load of the liquefied natural gas The spacers 150 are spaced apart from one another. The heat insulating wall fixing device further includes a special washer 130 inserted between the lower plate and the nut of the primary heat insulating wall to prevent the heat insulating wall fixing device from being detached even if the lower plate of the primary heat insulating wall shrinks, And a spring washer 140 inserted between the nuts to prevent the nut from being unscrewed when the lower plate of the primary heat insulating wall shrinks in the height direction.

A strip 40 of a metal material is provided on the upper plate of the secondary insulation wall 30 and the stud bolt 110 is fixed to the strip 40. The inside of the strip and the lower portion of the stud bolt The stud bolt can be fastened to the strip by engaging the stud bolt with the inside of the strip.

A through hole is previously formed in the primary heat insulating wall 20 and the secondary sealing wall (not shown) at a position where the heat insulating wall fixing device is installed. The stud bolt 110 is fixed to the primary heat insulating wall 20 and the secondary sealing The special washer 130 and the spring washer 140 are inserted, and then the nut is fastened to the stud bolt to fix the primary heat insulating wall to the secondary heat insulating wall.

The special washer 130 serves to prevent the lower plate of the primary heat insulating wall from being detached from the heat insulating wall fixing device even if it shrinks. The special washer 130 has a larger diameter than the diameter of the nut 120, thereby securing a large area where the lower plate of the primary heat insulating wall can slide.

After the nut 120 is fastened to the stud bolt 110, the spacer 150 may be inserted. The spacer may have a donut shape to cover the side surface of the nut, and may be made of plywood. The spacer 150 can protect the bolt and the nut by distributing the load of the liquefied natural gas.

According to the heat insulating wall fixing device having such a structure, since the lower plate of the primary heat insulating wall can slide between the secondary sealing wall and the special washer, the primary heat insulating wall slides in the horizontal direction when the heat shrinks, Can be minimized.

As described above, in order to install the heat insulating wall fastening apparatus 100, holes, that is, through holes are formed in the upper part of the secondary heat insulating wall and the primary heat insulating wall. However, if the hole is left as it is after the installation work of the insulation wall fixing device is completed, a cold spot may be generated, causing a structural problem in the insulation system of the storage tank and a problem of increasing the boil off rate have. Therefore, in this embodiment, the hole is closed with the heat insulating plug 200. After inserting the spacer 150 of the heat insulating wall fixing device, the heat insulating plug 200 is inserted into the through hole and fixed.

The heat insulating plug 200 includes upper and lower plates 210 and 230 made of plywood and a heat insulating material 220 provided between the upper and lower plates. The heat insulating plug 200 is inserted into the lower end of the lower plate 230, And a lower cap portion 240 coupled to the device 100. The upper and lower plates may be made of plywood, and the heat insulating material may be polyurethane foam.

As shown in FIGS. 1 to 3, the thermal head 200H is formed by the upper plate 210 whose sectional diameter is larger than the sectional diameter of the lower cap 240, the lower plate 230 and the heat insulating material 220, As shown in FIG. As shown in Fig. 1, the primary heat insulating wall can be machined such that the head 200H portion of the heat insulating plug is laid over the primary heat insulating wall 20 upper plate after the heat insulating plug is inserted into the hole between the heat insulating walls have.

The lower cap portion 240 includes a cap portion 241 that is fastened to the lower end of the heat insulating plug lower plate and a flange portion 242 that extends radially from the lower end of the cap portion and is coupled to the heat insulating wall fastening device.

The bottom plate 230 of the heat insulating plug 230 is formed with a hole at its center portion so that the cap portion 2410 of the lower cap portion is inserted into the hole to fasten the lower plate 230 and the lower cap portion 240.

A screw thread is formed inside the cap portion 241 of the lower cap portion and the thread is fastened to the upper portion of the stud bolt 110 by bolting so that the heat insulating plug 200 can be coupled to the heat insulating wall fastening device 100 have.

As described above, in the apparatus of this embodiment, by fastening the constituent parts with threaded shapes by bolting, the work is easy and the working time can be shortened. In addition, there is no need to use an adhesive, so that even if there is a temperature change, the structural holding force is strong and the structural stability is high.

The assembling and installation performance of the fixing device can be further improved by processing the heat insulating plug according to the following embodiments.

First, as shown in FIG. 2, the first embodiment provides a plurality of holes H on the top surface of the head by the top plate 210 of the heat insulating plug 200A. As described above, the bottom surface of the heat insulating plug, that is, the inner side of the lower cap portion of the heat insulating plug is provided with threads that can be engaged with the stud bolts of the heat insulating wall fixing device, so that the heat insulating plug and the heat insulating wall fixing device are bolted By providing a plurality of holes on the upper surface of the upper plate head of the heat insulating plug, the bolting work can be smoothly performed, and the working efficiency and productivity can be improved.

It is possible to easily bolt the apparatus through the hole H provided on the top surface of the head. Therefore, a separate space for the bolting operation is not required between the upper plate of the heat insulating plug and the through hole of the primary heat insulating wall. Therefore, it is possible to increase the heat insulating property by machining the upper plate of the heat insulating plug to the through hole, and it is structurally stable because the heat insulating plug can be engaged with the through hole without a space for remaining or floating.

As shown in FIG. 3, the second embodiment is to provide a ten-letter-shaped groove C on the upper surface of the upper plate head of the heat insulating plug 200B. By providing a cruciform groove, it is possible to increase the working efficiency at the time of installing the heat insulating wall fixing device and the heat insulating plug in the same manner as in the first embodiment.

The cross-shaped groove C crossing the upper end surface of the upper plate 210 provides a path through which the gas can circulate when the storage tank is purged by using nitrogen gas or the like after the storage tank is installed There is also an effect that can be done.

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

10: primary sealing wall
20: Primary insulation wall
30: Secondary insulation wall
40: strip
100: Insulation wall fixing device
200: Insulation plug

Claims (11)

A primary sealing wall contacting the liquefied natural gas and contacting the liquefied natural gas; A primary heat insulating wall provided outside the primary sealing wall; And a secondary insulation wall provided on the outer side of the primary insulation wall. In the fixing device provided in the liquefied natural gas storage tank,
An insulating wall fixing device for fixing the primary heat insulating wall and the secondary heat insulating wall; And
And a heat insulating plug arranged to heat a space generated from the upper portion of the heat insulating wall fixing device to the installation of the heat insulating wall fixing device
The heat insulating wall fixing device comprises:
A stud bolt fixedly coupled to the secondary heat insulating wall;
And a nut fastened to the stud bolt,
Wherein the heat-
Upper and lower plates made of plywood;
A heat insulating material provided between the upper and lower plates; And
And a lower cap part coupled to the lower end of the lower plate and coupled to the heat insulating wall fixing device,
The lower cap portion
A cap portion coupled to a lower end of the lower plate; And
And a flange portion extending radially from a lower end of the cap portion and coupled to the heat insulating wall fixing device,
A through hole is formed in the primary heat insulating wall, the stud bolt is inserted into the through hole and is fastened to the nut, and the primary heat insulating wall is fixed to the secondary heat insulating wall by the heat insulating wall fixing device ,
The remaining space of the through hole is sealed with the heat insulating plug to maintain the heat insulating property,
Wherein the lower plate of the heat insulating plug has a hole formed at a central portion thereof, the cap portion of the lower cap portion is inserted and fastened to the hole,
A screw thread is formed on the inside of the cap portion and is fastened to an upper portion of the stud bolt by bolting so that the heat insulating plug is coupled to the heat insulating wall fastening device
Wherein the liquefied natural gas storage tank is fixed to the liquefied natural gas storage tank. The method according to claim 1,
Wherein the heat insulating plug has a columnar shape in which the head is provided by the upper plate having a larger cross-sectional diameter than the cross-sectional diameter of the lower cap portion, the lower plate, and the heat insulating material. 3. The method of claim 2,
And a plurality of holes are formed in the upper surface of the head by the upper plate. 3. The method of claim 2,
Wherein a top surface of the head by the top plate is provided with a cruciform groove capable of providing a circulation path of gas when purging the storage tank. delete delete The method according to claim 1,
The heat insulating wall fixing device comprises:
Further comprising a special washer interposed between the lower plate of the primary insulating wall and the nut,
The special washer having a diameter greater than the diameter of the nut,
The lower plate of the primary heat insulating wall can slide between the secondary sealing wall of the storage tank and the special washer,
Those that slide in the horizontal direction and can withstand thermal stress when the lower plate of the primary heat insulating wall shrinks in the transverse direction
Wherein the liquefied natural gas storage tank is fixed to the liquefied natural gas storage tank. 8. The method of claim 7,
The heat insulating wall fixing device comprises:
Further comprising a spring washer interposed between the special washer and the nut,
Which can prevent the nut from being released when the lower plate of the primary heat insulating wall contracts in the height direction
Wherein the liquefied natural gas storage tank is fixed to the liquefied natural gas storage tank. The method according to claim 1,
Wherein the upper plate of the secondary insulation wall is provided with a strip of a metal material, and the stud bolt is fixed to the strip. The heat insulating wall fixing apparatus according to claim 1,
Further comprising a spacer provided around the outer surface of the nut to disperse the load of the liquefied natural gas. delete
KR1020150102993A 2015-07-21 2015-07-21 Securing device for lng storage tank KR101751837B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020150102993A KR101751837B1 (en) 2015-07-21 2015-07-21 Securing device for lng storage tank
PCT/KR2016/005968 WO2017014426A1 (en) 2015-07-21 2016-06-07 Fixation apparatus of liquefied natural gas storage tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150102993A KR101751837B1 (en) 2015-07-21 2015-07-21 Securing device for lng storage tank

Publications (2)

Publication Number Publication Date
KR20170011064A KR20170011064A (en) 2017-02-02
KR101751837B1 true KR101751837B1 (en) 2017-06-28

Family

ID=57835022

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150102993A KR101751837B1 (en) 2015-07-21 2015-07-21 Securing device for lng storage tank

Country Status (2)

Country Link
KR (1) KR101751837B1 (en)
WO (1) WO2017014426A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190033237A (en) * 2017-09-21 2019-03-29 삼성중공업 주식회사 Cargo of liguefied natural gas
FR3144852A1 (en) * 2023-01-09 2024-07-12 Gaztransport Et Technigaz Repair plug and method of repairing a waterproof and thermally insulating wall

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3064042B1 (en) * 2017-03-15 2021-10-22 Gaztransport Et Technigaz WATERPROOF AND THERMALLY INSULATED TANK WITH A REINFORCING INSULATING CAP
FR3073270B1 (en) 2017-11-06 2019-11-15 Gaztransport Et Technigaz SEALED AND THERMALLY INSULATING TANK WITH DEVICES FOR ANCHORING PRIMARY INSULATION PANELS ON SECONDARY INSULATING PANELS
FR3073600B1 (en) * 2017-11-13 2019-12-06 Gaztransport Et Technigaz METHOD FOR MANUFACTURING A THERMAL INSULATION BARRIER OF A WALL OF A TANK AND THERMAL INSULATION BARRIER THUS OBTAINED
KR102447934B1 (en) 2018-08-23 2022-09-26 주식회사 엘지화학 Device for tapping anchor bolt
KR102576200B1 (en) * 2018-12-27 2023-09-07 한화오션 주식회사 Insulation wall securing device for lng storage tank
KR102248137B1 (en) * 2019-12-10 2021-05-04 한국가스공사 Corner structure of liquefied gas storage tank
FR3105342B1 (en) * 2019-12-23 2022-06-03 Gaztransport Et Technigaz Thermally insulating barrier for a wall of a tank
FR3116100B1 (en) * 2020-11-10 2022-11-04 Gaztransport Et Technigaz Process for manufacturing a thermally insulating barrier for a tank
FR3116101B1 (en) * 2020-11-10 2023-04-28 Gaztransport Et Technigaz Process for manufacturing a thermally insulating barrier for a tank

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3820328B2 (en) * 1998-07-24 2006-09-13 ガズ トランスポール エ テクニガズ Improving impervious and insulating tanks including assembly panels
KR101399843B1 (en) * 2012-09-27 2014-05-30 삼성중공업 주식회사 Lng cargo insulation system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110046627A (en) * 2009-10-29 2011-05-06 주식회사 화인텍 Insulation panel attachment structure of an independence type liquified gas tank and attachment method thereof
KR101607558B1 (en) * 2009-11-26 2016-03-30 대우조선해양 주식회사 Insulation panel installation structure of a liquified gas storage tank
KR101865162B1 (en) * 2011-12-16 2018-06-07 삼성중공업 주식회사 Lng storage tank
KR101516552B1 (en) * 2013-04-05 2015-05-06 삼성중공업 주식회사 Cargo barrier structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3820328B2 (en) * 1998-07-24 2006-09-13 ガズ トランスポール エ テクニガズ Improving impervious and insulating tanks including assembly panels
KR101399843B1 (en) * 2012-09-27 2014-05-30 삼성중공업 주식회사 Lng cargo insulation system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190033237A (en) * 2017-09-21 2019-03-29 삼성중공업 주식회사 Cargo of liguefied natural gas
KR101973091B1 (en) 2017-09-21 2019-04-26 삼성중공업 주식회사 Cargo of liguefied natural gas
FR3144852A1 (en) * 2023-01-09 2024-07-12 Gaztransport Et Technigaz Repair plug and method of repairing a waterproof and thermally insulating wall

Also Published As

Publication number Publication date
KR20170011064A (en) 2017-02-02
WO2017014426A1 (en) 2017-01-26

Similar Documents

Publication Publication Date Title
KR101751837B1 (en) Securing device for lng storage tank
US20170175952A1 (en) Liquefied natural gas storage tank and insulating wall for liquefied natural gas storage tank
KR101408356B1 (en) Insulation box fixing apparatus for cargo containment
KR20110046627A (en) Insulation panel attachment structure of an independence type liquified gas tank and attachment method thereof
KR101739463B1 (en) Lng storage tank
US20170144733A1 (en) Liquefied natural gas storage tank and insulating wall securing device for liquefied natural gas storage tank
KR20160004756A (en) Lng storage tank and insulation pannel securing device thereof
KR101867035B1 (en) Membrane type insulation box system of natural gas cargo and securing apparatus thereof
KR20160024016A (en) Cargo barrier structure
KR101310959B1 (en) Insulation box fixing structure for cargo containment
KR101686507B1 (en) Lng storage tank
KR101686506B1 (en) Lng storage tank and insulation pannel thereof
KR101884761B1 (en) Insulation box system and insert nut type securing apparatus thereof
KR20160004754A (en) Lng storage tank and insulation pannel securing device thereof
KR101567874B1 (en) Connecting Structure And Method For Insulation System
KR101567877B1 (en) Connecting Structure And Method For Insulation System
KR102165068B1 (en) Lng storage tank and insulation pannel securing device thereof
KR101732560B1 (en) Fixing and support apparatus for insulation structure
KR102266246B1 (en) Insulation system of liquefied natural gas cargo hold
KR101818524B1 (en) Membrane type insulation box system of natural gas cargo and securing apparatus thereof
KR101644374B1 (en) Fixing and support apparatus for insulation structure
KR101739464B1 (en) Lng storage tank
KR102150085B1 (en) Lng storage tank and insulation pannel securing device thereof
KR101594104B1 (en) Lng storage tank and sealing wall thereof
KR101847022B1 (en) Membrane type insulation box system of natural gas cargo and securing apparatus thereof

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant