WO2008007837A1 - Système d'isolation de type bout à bout possédant une barrière auxiliaire soudable pour citernes de gnl - Google Patents

Système d'isolation de type bout à bout possédant une barrière auxiliaire soudable pour citernes de gnl Download PDF

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Publication number
WO2008007837A1
WO2008007837A1 PCT/KR2006/005584 KR2006005584W WO2008007837A1 WO 2008007837 A1 WO2008007837 A1 WO 2008007837A1 KR 2006005584 W KR2006005584 W KR 2006005584W WO 2008007837 A1 WO2008007837 A1 WO 2008007837A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulation
primary
weldable
insulation panels
coupling
Prior art date
Application number
PCT/KR2006/005584
Other languages
English (en)
Inventor
Keh-Sik Min
Oi-Hyun Kim
Joong-Geun Youn
Dae-Young Kim
Yong-Shin So
Hyun-Soo Kim
Myoung-Seoup Han
Original Assignee
Hyundai Heavy Industries Co., Ltd.
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
Priority claimed from KR1020060064729A external-priority patent/KR100782671B1/ko
Priority claimed from KR1020060093365A external-priority patent/KR100748819B1/ko
Application filed by Hyundai Heavy Industries Co., Ltd. filed Critical Hyundai Heavy Industries Co., Ltd.
Publication of WO2008007837A1 publication Critical patent/WO2008007837A1/fr

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • 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
    • F17C2209/221—Welding
    • 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

Definitions

  • the present invention relates, in general, to an insulation system for LNG (liquefied natural gas) tanks and, more particularly, to a seam butt type insulation system having a weldable secondary barrier for LNG tanks, in which the secondary barrier is formed by integrally welding invar strakes and tongues, and primary insulation panels and secondary insulation panels are layered in an alternate arrangement such that they are staggered with each other, thus enhancing the thermal insulation efficiency and the tightness-against-leak of the insulation system, and increasing workability.
  • LNG liquefied natural gas
  • an insulated container for storing and carrying very low temperature liquefied gas is becoming very important.
  • a thermal insulation technique for preventing liquefied gas from boiling due to heat transferred from the outside and a technique for preventing liquefied gas from leaking are very important.
  • Either an external insulation method or an internal insulation method is a representative example of insulation methods that are widely used at the present time.
  • the internal insulation method has an advantage in that, the outer casing of a container can be maintained at a temperature similar to the temperature of the outside air so that it is easy to select materials for the container.
  • a technique using such an internal insulation method there is a widely known membrane type insulation system, which was developed by the GTT company of France and has a double barrier structure.
  • FIG. 7 is a schematic sectional view showing a membrane type insulation system for a cargo tank of an LNG carrier.
  • the conventional insulation system has a double barrier structure which includes a primary insulation panel 510 disposed at an upper position, a secondary insulation panel 520 disposed at a lower position, a primary membrane barrier 550 made of stainless steel, and a secondary barrier 530 made of triplex.
  • the thickness of each insulation panel is respectively 100 mm and 170 mm.
  • the junction between adjacent secondary barriers is sealed with a sealing member 531, which is made of the same material as that of the secondary barrier, called flexible triplex, and, thereafter, a connection pad 540, which is made of the same material as that of the primary insulation panel, is provided on the sealing member.
  • a sealing member 531 which is made of the same material as that of the secondary barrier, called flexible triplex
  • a connection pad 540 which is made of the same material as that of the primary insulation panel
  • the reference numeral 551 denotes the junction between the primary barriers
  • 560 denotes an inner hull structure
  • 570 denotes an inner hull structure/insulation panel coupling member
  • 580 denotes a fastening bolt.
  • an object of the present invention is to provide a seam butt type insulation system having a weldable secondary barrier for LNG tanks, in which the secondary barrier is formed by integrally welding invar strakes to tongues and between strakes, and primary insulation panels and secondary insulation panels are layered in an alternate arrangement such that they are staggered with each other, thus enhancing the thermal insulation efficiency and the tightness-against-leak of the insulation system and increasing workability.
  • Another object of the present invention is to provide a seam butt type insulation system having a weldable secondary barrier for LNG tanks in which the invar secondary barrier is formed by resistance welding, thus markedly reducing work time and effort, thereby enhancing workability.
  • a further object of the present invention is to provide a seam butt type insulation system having a weldable secondary barrier for LNG tanks in which the primary insulation panels are assembled by a mechanical coupling method, thus increasing ease of assembly and enhancing the stability of the insulation panels.
  • Yet another object of the present invention is to provide a seam butt type insulation system having a weldable secondary barrier for LNG tanks which uses a spring type coupling unit provided with a tension spring having an elastic deformation range greater than that of a tongue, a bolt and a hook type bolt, so that, even if contraction deformation of insulation panels occurs due to hydrostatic head pressure and a change in temperature of the LNG, the tension spring can sufficiently absorb the contraction deformation and maintain the tension, thus reliably maintaining the coupling between the primary and secondary insulation panels.
  • the present invention provides a seam butt type insulation system having a weldable secondary barrier for LNG tanks, comprising a plurality of secondary insulation panels 20 continuously arranged and coupled to a support body through insulation panel connection members, a tongue 30 installed at the center in the upper surface of each secondary insulation panel 20, a secondary barrier 40 formed into an integrated structure by welding opposite edges of each of a plurality of invar strakes 41 to the tongues 30 of adjacent secondary insulation panels 20, a primary insulation panel 10 provided on each invar strake 41 provided between the tongues 30, a coupling unit 50 for coupling adjacent edges of the adjacent primary insulation panels 10 to each of the tongues 30 through a mechanical coupling structure, and a primary barrier 60 welded to upper surfaces of the primary insulation panels 10.
  • the secondary insulation panels 20 are provided in a continuous arrangement, thus forming a secondary insulation layer 200, and the primary insulation panels 10 are provided on the secondary insulation layer in a continuous arrangement, thus forming the primary insulation layer 100.
  • the secondary barrier is disposed between the primary insulation layer 100 and the secondary insulation layer 200, and the primary barrier is provided on the primary insulation layer 10.
  • the secondary barrier 40 is formed into an integrated structure by welding the opposite edges of the invar strakes 41 with tongue and the strake to strake.
  • the primary insulation panels 10 and secondary insulation panels 20 are layered in an alternate arrangement such that gaps defined between the primary insulation panels and gaps defined between the secondary insulation panels are staggered.
  • the opposite edges of the primary insulation panels 10 of the primary insulation layer are fastened by the coupling units 50 both to the secondary insulation panels 20 and to the tongues 30, which are coupled to the respective secondary insulation panels 20.
  • the primary barrier 60 provided on the primary insulation layer has corrugations, which protrude upwards, such that the primary barrier 60 can easily expand and contract in response to changes in temperature of the contained contents .
  • the distance (L) between adjacent corrugations of the primary barrier ranges from 300 mm to 600 mm.
  • each invar strake 41 has on opposite edges thereof welding regions 42, which are welded to the tongues 30, and each of which is integrally formed by bending each of the opposite edges of the invar strake upwards to have a protruding shape.
  • Each primary insulation panel 10 is inserted between the welding regions 42 of each invar strake 41.
  • a secondary barrier has an integrated structure and primary and secondary insulation layers form a seam butt structure, thus ensuring superior tightness-against-leak and enhancing insulation efficiency.
  • the present invention can markedly reduce construction time and effort, thus enhancing workability and productivity.
  • the primary insulation panels and the secondary insulation panels are layered in an alternating arrangement, such that the gaps in the secondary insulation layer and the gaps in the primary insulation layer are staggered. Therefore, the gaps can be double-sealed, thus increasing the tightness-against-leak, thereby enhancing the reliability and insulation efficiency of the secondary barrier.
  • the present invention is constructed such that the primary insulation panels are supported by coupling units, so that they can be fixed more reliably. In the case where double-sided adhesive members or an adhesive agent is used, the stability of the primary insulation panels can be further enhanced.
  • the primary barrier is made of stainless steel, and the distance between corrugations ranges from 300 mm to 600 mm, and preferably, is approximately 510 mm, which is greater than 340 mm, which is the distance between corrugations of the conventional primary barrier. Therefore, it is easy to manufacture the primary barrier, so that workability and productivity can be increased.
  • FIG. 1 is a schematic sectional view showing the construction of an embodiment according to the present invention
  • FIG. 2 is views showing the assembly of the present invention
  • FIG. 3 is views showing the present invention in an assembled state
  • FIG. 4 is views showing the structure of a hook type coupling unit according to the present invention.
  • FIG. 5 is views showing the structure of a welding type coupling unit according to the present invention.
  • FIG. 6 is a perspective view showing the installation of the present invention.
  • FIG. 7 is a schematic sectional view showing a conventional membrane type insulation system of a cargo tank of an LNG carrier
  • FIG. 8 is a perspective view illustrating contraction displacement of a primary insulation panel according to an initial coupling state, a hydrostatic head pressure and a change in temperature, when the primary insulation panel is fastened with a hook type bolt;
  • FIG. 9 is an exploded perspective view of a spring type coupling unit according to the present invention.
  • FIG. 10 is a perspective view of the assembled spring type coupling unit according to the present invention.
  • FIG. 11 is a partially enlarged sectional view showing the insulation panels fastened to the cargo tank in the LNG carrier using the spring type coupling unit according to the present invention.
  • inner hull structure/insulation panel coupling member (80) inner hull structure (91) : primary insulation layer gap (92) : secondary insulation layer gap (100) : primary insulation layer
  • FIG. 1 is a schematic sectional view showing the construction of an embodiment according to the present invention.
  • FIG. 2 is views showing the assembly of the present invention.
  • FIG. 3 is views showing the assembled present invention.
  • FIG. 4 is views showing the structure of a hook type coupling unit according to the present invention.
  • FIG. 5 is views showing the structure of a welding type coupling unit according to the present invention.
  • FIG. 6 is a perspective view showing the installation of the present invention.
  • FIG. 9 is an exploded perspective view of a spring type coupling unit according to the present invention.
  • FIG. 10 is a perspective view of the assembled spring type coupling unit according to the present invention.
  • FIG. 11 is a partially enlarged sectional view showing the insulation panel fastened to the cargo tank in the LNG carrier using the spring type coupling unit according to the present invention.
  • each coupling bolt 9 is provided in an inner hull structure 80 at positions spaced apart from each other at regular intervals, so that the insulation system of the cargo tank for containing LNG therein is fastened to the inner hull structure 80 using the coupling bolts 9.
  • a plurality of inner hull structure/insulation panel coupling members 70 is installed between the coupling bolts 9 so as to support and fasten the insulation system to the inner hull structure 80.
  • Several secondary insulation panels 20 are provided both on the coupling bolts 9 and on the inner hull structure/insulation panel coupling members 70 in a continuous arrangement. Each secondary insulation panel 20 is made of polyurethane insulation material.
  • an upper plywood plate 21 and a lower plywood plate 22, which are made of wood or synthetic resin, are integrally provided on the upper and lower surfaces, respectively, of each secondary insulation panel 20. Furthermore, coupling holes 7 are formed at predetermined positions in the secondary insulation panel 20, such that the coupling bolts 9 provided in the inner hull structure pass through the lower plywood plate 22 and are tightened into respective coupling nuts 8. After the secondary insulation panel 20 has been fastened by the coupling nuts 8, the coupling holes 7 are filled with packing inserts 6, which are made of polyurethane, which is the same as the material of the secondary insulation panel 20, or is made of a well-known highly efficient insulating material.
  • a T-shaped or L-shaped tongue insertion slot 25 is formed at the center in the upper plywood plate 21 along the longitudinal axis thereof, such that a tongue 30 is longitudinally inserted into the secondary insulation panel 20.
  • the tongues 30, which support a secondary barrier 40 and make it possible to conduct the welding operation are inserted into the respective tongue insertion slots 25.
  • Each tongue 30 is inserted at the lower end thereof into the associated tongue insertion slot 25, formed in the secondary insulation panel, and is placed at the upper end thereof in each insertion gap 91 between the secondary insulation panels.
  • the upper end of each tongue 30 is coupled to an associated coupling unit 50.
  • a locking part 32 which is inserted into and locked to the tongue insertion slot 25 of the secondary insulation panel, is bent from the lower end of the tongue 30, so that the tongue 30 has an L- shaped cross-section.
  • the tongue insertion slot 25 is formed by machining the interface between the insulation material and the upper plywood plate 21 and by machining the upper plywood plate 21 of the secondary insulation panel.
  • a slot having a depth that ranges from 1 through to 3 mm and is thus appropriate for insertion of the tongue 30 therein, is formed at the center of the upper part of the secondary insulation panel 20 along a longitudinal axis thereof.
  • a reverse T-shaped slot is formed from the upper plywood plate 21 to the interface between the insulation material and the upper plywood plate 21 by machining, thus forming the tongue insertion slot 25 in the longitudinal direction of the secondary insulation panel 20.
  • the above method of forming the tongue insertion slot 25 enables easy manufacturing, thus providing many advantages in manufacturing a secondary insulation layer 200 including the tongue insertion slot 25.
  • An invar strake 41 is provided between the tongues of adjacent secondary insulation panels.
  • the welding regions 42 of the invar strakes 41 are welded to respective tongues 30, thus forming the secondary barrier 40.
  • a primary insulation panel 10 is installed between the welding regions 42, which are provided on opposite edges of each invar strake 41.
  • the primary insulation panel 10 is made of polyurethane insulation material.
  • An upper plywood plate 11 made of wood or synthetic resin may be integrally provided on the upper surface of the primary insulation panel 10.
  • an upper plywood plate 11 and a lower plywood plate 12, which are made of wood or synthetic resin, are integrally provided on the upper and lower surfaces, respectively, of each secondary insulation panel 20.
  • a coupling seat 13, which is stepped from the upper plywood plate 11, is formed in each of opposite edges of the upper plywood plate 11, so that each coupling unit 50 is inserted into the adjacent coupling seats 13.
  • Anchor stripe for welding 14 are provided on the upper surfaces of the respective upper plywood plates 11 such that a primary barrier 60 can be welded to the primary insulation panels 10. At least two adjacent stainless steel membrane sheets are lap-welded to each anchor stripe 14, thus forming the primary barrier 60.
  • the opposite edges of the upper plywood plates 11 of the primary insulation panels are coupled to the tongues 30, which are provided on the secondary insulation panels 20, through the coupling units 50. Furthermore, stainless steel membrane sheets, each of which has corrugations, are provided on the upper surface of the primary insulation panels 10 in a continuous arrangement, thus forming the primary barrier 60.
  • each invar strake 41 has the welding regions 42 to be welded on opposite edges thereof.
  • the welding regions 42 are integrally formed on the invar strake 41 by bending the opposite edges of the invar strake 41 such that they protrude upwards. That is, the opposite edges of the invar strake 41 are bent upwards to have the same height. As such, each part, which is bent to have the protruding shape, forms the welding region 42.
  • the welding regions 42 are brought into contact with the associated tongues 30, which protrude from the longitudinal centers of the respective secondary insulation panels 20. Thereafter, the welding regions 42 are integrated with the associated tongues 30 by welding.
  • each invar strake 41 is installed such that the welding regions 42 provided on the opposite edges of the invar strake 41 are respectively brought into contact with the tongue that is provided in a secondary insulation panel and with the tongue that is provided in an adjacent secondary insulation panel.
  • the welding regions and the tongues, which contact each other, are integrated with each other by resistance welding such that the tightness-against- leak is ensured.
  • the coupling units 50 serve to hold the primary insulation panels 10.
  • each coupling unit 50 may comprise a hook type coupling unit 51, a hook of which is locked to a locking hole to fasten the primary insulation panels to the associated tongue.
  • FIG. 1 shows a hook type coupling unit 51, a hook of which is locked to a locking hole to fasten the primary insulation panels to the associated tongue.
  • each coupling unit 50 may comprise a welding type coupling unit 51', which is integrated with the associated tongue by welding, thus fixing the primary insulation panels.
  • each coupling unit 50 may comprise a spring type coupling unit 51a having a tension spring.
  • the hook type coupling unit 51 includes an adjustment coupling rod 53, which has the hook 54 on a lower end thereof. The hook 54 is inserted into and locked to a locking hole 52, which is formed in the tongue 30 coupled to the secondary insulation panel 20.
  • the hook type coupling unit 51 further includes a support plate 55, the opposite ends of which are seated in the respective coupling seats 13 of the upper plywood plates 11 of the two adjacent primary insulation panels.
  • the upper end of the adjustment coupling rod 53 passes through the center of the support plate 55 and is tightened into a locking nut 56, so that the support plate 55 is reliably coupled to the adjustment coupling rod 53 locked to the locking hole 52, thus reliably fastening the primary insulation panels 10.
  • a separate subsidiary plate 58 having a locking hole 52 may be provided. That is, the subsidiary plate 58 having the locking hole 52 is integrated with the tongue by welding, and this is used for fastening the primary insulation panels 10.
  • the welding type coupling unit 51' includes an adjustment coupling rod 53', a lower end 54' of which is fitted over and integrated with the tongue 30 of the secondary insulation panel 20 by welding.
  • the welding type coupling unit 51' further includes a support plate 55' , the opposite ends of which are seated into the respective coupling seats 13 of the upper plywood plates 11 of the two adjacent primary insulation panels.
  • the upper end of the adjustment coupling rod 53' passes through the center of the support plate 55' and is tightened into a locking nut 56' , so that the support plate 55' is reliably coupled to the adjustment coupling rod 53' , thus reliably fastening the primary insulation panels 10.
  • a separate subsidiary plate 58' may be provided on the tongue 30 coupled to the secondary insulation panel 20 by welding, so that the lower end 54' of the adjustment coupling rod 53' is fitted over and integrated with the subsidiary plate 58 ' by welding .
  • each of the hook type coupling unit 51 and the welding type coupling unit 51' having the above-mentioned constructions an insulation member 57, 57' or a plywood plate is provided on the upper surface of the support plate 55, 55' .
  • the insulation member is made of polyurethane, which is used as the material of the primary and secondary insulation panels 10 and 20, or is made of a well-known highly efficient insulation material.
  • each of the hook type coupling unit 51 and the welding type coupling unit 51' is level with the upper surfaces of the upper plywood plates 11 of the primary insulation panels.
  • the support plate 55, 55' and the plywood plate or insulation member 57, 57' of each of the hook type coupling unit 51 and the welding type coupling unit 51' are seated into the coupling seats 13, which are formed in adjacent edges of the upper plywood plates of the adjacent primary insulation panels to have stepped structures.
  • the height of the support plate 55, 55' and the plywood plate or insulation member 57, 57' of the coupling unit corresponds to the depths of the coupling seats 13, which are stepped. Therefore, when the plywood plate or insulation member is provided on the support plate, the height of the plywood plate or insulation member is the same as that of the upper surface of the upper plywood plate of the primary insulation panel. Meanwhile, as shown in FIGS.
  • a spring locking hole 31 is formed in the tongue 30 coupled to the secondary insulation panel 20.
  • a locking hook 532a which is provided on the lower end of a tension spring 53a, is inserted into the spring locking hole 31.
  • Opposite ends of a support plate 55a are seated into the respective coupling seats 13 of the upper plywood plates 11 of the two adjacent primary insulation panels.
  • the upper end of the tension spring 53a which has a nut coupling thread 531a, passes through the center of the support plate 55a.
  • the nut coupling thread 531a which has passed through the support plate, is tightened into a locking nut 5 ⁇ a, so that the support plate 55a is reliably coupled to the tension spring 53a coupled to the tongue 30, thus reliably fastening the primary insulation panels 10.
  • the spring type coupling unit 51a includes the tension spring 53a, which has on the upper end thereof the nut coupling thread 531a and has on the lower end thereof the locking hook 532a, which is to be inserted into the locking hole 31 of the tongue 30, and the support plate 55a, which has a coupling thread passing hole 551a in the center thereof, and the opposite ends of which are seated into the respective coupling seats 13 formed in the upper plywood plates 11 of the adjacent primary insulation panels 10.
  • the spring type coupling unit 51a includes the locking nut 5 ⁇ a, which engages with the nut coupling thread 531a of the upper end of the tension spring 53a, which protrudes through the coupling thread passing hole 551a of the support plate.
  • the spring type coupling unit 51a serves to couple the two adjacent primary insulation panels 10 to the associated secondary insulation panel 2 using the tension spring 53a and the tongue 30.
  • the support plate 55a is formed by bending a steel plate used for low temperature to have a " T-T " shaped cross-section. Opposite blade area 552a of the support plate 55a are locked to the respective coupling seats 13 of the upper plywood plates 11 of the adjacent primary insulation panels 10. A stepped part 553a, which is bent downwards from the blade area 552a, is inserted into a gap 13 defined between the upper plywood plates 11 of the adjacent primary insulation panels 10.
  • a countersunk head screw coupling hole 554a may be formed through one blade part 552a of the support plate 55a, and thus the support plate 55a may be firmly fastened to the upper plywood plate 11 of the associated primary insulation panel 10 using a countersunk head screw 555a.
  • the spring type coupling unit 51a has the tension spring 53a, the support plate 55a and the locking nut 56a as critical elements thereof.
  • the spring type coupling unit 51a is additionally characterized in that the support plate 55a is fastened to the upper plywood plate 11 of the associated primary insulation panel 10 using the countersunk head screw 555a.
  • the upper end of the tension spring 53a is vertically bent to form a protrusion part.
  • the nut coupling thread 531a is formed on the protrusion part, which is inserted into the coupling thread passing hole 551a, formed in the center through the support plate 55a, so that the locking nut 5 ⁇ a engages with the nut coupling thread 531a.
  • the locking hook 532a which is locked to the spring locking hole 31 of the tongue 30, is integrally bent on the lower end of the tension spring 53a.
  • the support plate 55a may have a rectangular planar shape.
  • the support plate 55a when the opposite ends of the support plate 55a are seated in the respective coupling seats 13 of the adjacent primary insulation panels 10, and, in order to fasten the tension spring 53a to the support plate 55a, when the locking nut 56a is tightened over the upper end of the tension spring 53a, the locking hook 532a of which is locked to the spring locking hole 31 of the tongue 30, the locking part 32 of which is locked to the tongue insertion hole 25 formed under the upper plywood plate 21 of the secondary insulation panel 20, the support plate 55a may be undesirably rotated. Furthermore, because the support plate 55a serves merely to push the primary insulation panels 10 towards the secondary insulation panel 20, there is a probability of the primary insulation panels 10, which have a gap therebetween, being undesirably moved by outside impact.
  • the blade area 552a which are provided on opposite sides of the stepped part 553a, are seated into the respective coupling seats 13 of the upper plywood plates 11 of the adjacent primary insulation panels 10, and the stepped part 553a, which is bent downwards, is inserted into the primary insulation layer gap 91 defined between the adjacent edges of the upper plywood plates of the primary insulation panels 10. Thereafter, the locking nut 56a is tightened over the nut coupling thread 531a of the tension spring 53a. Accordingly, in the present invention, when the primary insulation panels 10 are fastened to the secondary insulation panel 20, the positions of the primary insulation panels 10 and the support plate 55a can be precisely, and easily determined and maintained.
  • the support plate 55a is bent to have a " T-JT " shaped cross-section, and thus the blade area 552a, which are provided on opposite sides of the stepped part 553a, are seated into the respective coupling seats 13 of the upper plywood plates 11 of the adjacent primary insulation panels 10, and the stepped part 553a, which is bent downwards, is inserted into the primary insulation layer gap 91 defined between the adjacent edges of the upper plywood plates of the primary insulation panels 10, and, thereafter, the locking nut 5 ⁇ a is tightened over the nut coupling thread 531a of the tension spring 53a, which is inserted into and protrudes from the coupling thread passing hole 551a of the stepped part 553a so that the primary insulation panels 10 are fastened to the secondary insulation panel 20 through the support plate 55a, the tension spring 53a and the tongue 30, if the tensioning force of the tension spring 53a is changed or the primary insulation panels 10 are moved with respect to each other by outside impact, the support plate 55a is undesirably moved
  • the countersunk head screw coupling hole 554a is formed through one blade part 552a of the support plate 55a, and thus the support plate 55a can be firmly fastened to the upper plywood plate 11 of the associated primary insulation panel 10 using the countersunk head screw 555a. Then, even if the tensioning force of the tension spring 53a is changed or the primary insulation panels 10 are moved with respect to each other by outside impact, because the support plate 53a is fastened to the upper plywood plate 11 of the associated primary insulation panel 10, the support plate 53a is prevented from being undesirably moved by outside impact and thus being unlocked from the primary insulation panels.
  • the tension springs 53a having an elastic deformation range greater than that of the tongue, a bolt and a hook type bolt, even if the insulation material constituting the present invention contracts due to the hydrostatic head pressure and a change in temperature of LNG, the tension springs 53a can sufficiently absorb contraction displacement and maintain the tensioning force. Therefore, the coupling between the primary and secondary insulation panels 10 and 20 can be reliably maintained.
  • the nut coupling thread 531a which engages with the locking nut 5 ⁇ a, is formed in the protrusion part, which is vertically bent on the upper end of the tension spring 53a and is inserted into the coupling thread passing hole 551a formed through the center of the support plate 55a.
  • the nut coupling thread 531a is inserted upwards into the coupling thread passing hole 551a of the support plate 55a, and the locking nut 56a is tightened over the nut coupling thread 531a of the tension spring 53a on the upper surface of the support plate 55a.
  • the tensioning force of the tension spring 53a applied to the primary and secondary insulation panels 10 and 20 can be adjusted depending on the degree to which the locking nut 56a is tightened over the nut coupling thread 531a, thus making the process of fastening the primary insulation panels 10 to the secondary insulation panels 20 easy.
  • a plywood plate or insulation member is also provided on the upper surface of the support plate 55a.
  • the insulation member is made of polyurethane, which is used as the material of the primary and secondary insulation panels 10 and 20, or is made of a well-known highly efficient insulation material.
  • the spring type coupling unit 51a provided through the above-mentioned installation process is leveled with the upper surfaces of the upper plywood plates 11 of the primary insulation panels.
  • double-sided adhesive members or an adhesive agent may be applied both between the primary insulation panels 10 and the secondary barrier 40 having the invar strakes and between the secondary barrier 40 and the secondary insulation panels 20, thus uniting the elements more reliably.
  • each primary insulation panel 10 and each upper plywood plate 11 of the primary insulation layer 100 or each primary insulation panel 10, each upper plywood plate 11 and each lower plywood plate 12 of the primary insulation layer 100 are coupled to each other by adhesion.
  • each secondary insulation panel 20, each upper plywood plate 21 and each lower plywood plate 22 of the secondary insulation layer 200 are coupled to each other by adhesion.
  • the gaps 91 of the primary insulation layer and the gaps 92 of the secondary insulation layer are filled with insulation members.
  • the insulation members are charged into each gap 91 of the primary insulation layer, which is defined between the adjacent primary insulation panels, and in which each coupling unit 50 is disposed, and into each gap 92 of the secondary insulation layer which is defined between the adjacent secondary insulation panels 20.
  • the insulation member is made of the same material as the primary and secondary insulation panels 10 and 20, or is made of a well-known highly efficient insulation material.
  • the present invention has the seam butt structure, in which the primary insulation panels 10 and the secondary insulation panels 20 are layered in an alternate arrangement such that the gaps 92 in the secondary insulation layer are staggered with the gaps 91 in the primary insulation layer. Furthermore, the invar strakes 41, which are provided between the primary insulation panels 10 and the secondary insulation panels 20, integrally form the secondary barrier 40 through the welding process, thus ensuring superior tightness-against- leak, and markedly reducing work time and effort compared to the conventional art, which requires adhesion work and quality inspection for the secondary barrier.
  • a secondary barrier has an integrated structure and primary and secondary insulation layers form a seam butt structure, thus ensuring superior tightness-against-leak and enhancing insulation efficiency.
  • the present invention can markedly reduce construction time and effort, thus enhancing workability and productivity.
  • the primary insulation panels and the secondary insulation panels are layered in an alternating arrangement, such that the gaps in the secondary insulation layer and the gaps in the primary insulation layer are staggered. Therefore, the gaps can be double-sealed, thus increasing tightness-against-leak, thereby enhancing the reliability and insulation efficiency of the secondary barrier.
  • the present invention is constructed such that the primary insulation panels are supported by coupling units, so that they can be fixed more reliably.
  • the stability of the primary insulation panels can be further enhanced.
  • the primary barrier is made of stainless steel, and the distance between corrugations ranges from 300 mm to 600 mm, and preferably, is approximately 510 mm, which is greater than 340 mm, which is the distance between corrugations of the conventional primary barrier. Therefore, it is easy to manufacture the primary barrier, so that workability and productivity can be increased.

Abstract

La présente invention concerne un système d'isolation de type bout à bout possédant une barrière secondaire soudable pour citernes de GNL. Ce système d'isolation de type bout à bout comprend des panneaux d'isolation secondaires (20) qui sont agencés en continu et raccordés à un corps de support par des éléments de connexion de panneau d'isolation, une langue (30), située dans la surface supérieure de chaque panneau d'isolation secondaire (20), et une barrière secondaire (40) qui est formée dans une structure intégrée par soudage des bords opposés de chaque virure d'invar (41) parmi une pluralité de celles-ci aux langues (30) des panneaux d'isolation secondaires contigus (20). Ce système d'isolation de type bout à bout comprend aussi un panneau d'isolation primaire (10) qui est situé sur chaque virure d'invar placée entre les langues contiguës (30), une unité de raccordement (50) qui raccorde des bords contigus des panneaux d'isolation primaires contigus (10) à chaque langue et, une barrière primaire (60) qui est soudée aux surfaces supérieures des panneaux d'isolation primaires (10).
PCT/KR2006/005584 2006-07-11 2006-12-19 Système d'isolation de type bout à bout possédant une barrière auxiliaire soudable pour citernes de gnl WO2008007837A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020060064729A KR100782671B1 (ko) 2006-07-11 2006-07-11 액화천연가스 저장용기용 2차방벽 용접형 심벗 단열시스템
KR10-2006-0064729 2006-07-11
KR1020060093365A KR100748819B1 (ko) 2006-09-26 2006-09-26 Ｌｎｇ 운반선 화물창의 단열판 고정장치
KR10-2006-0093365 2006-09-26

Publications (1)

Publication Number Publication Date
WO2008007837A1 true WO2008007837A1 (fr) 2008-01-17

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Application Number Title Priority Date Filing Date
PCT/KR2006/005584 WO2008007837A1 (fr) 2006-07-11 2006-12-19 Système d'isolation de type bout à bout possédant une barrière auxiliaire soudable pour citernes de gnl

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Country Link
WO (1) WO2008007837A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2936784A1 (fr) * 2008-10-08 2010-04-09 Gaztransp Et Technigaz Cuve a membrane ondulee renforcee
US7717289B2 (en) * 2006-09-01 2010-05-18 Korea Gas Corporation Anchor for liquefied natural gas storage tank
AU2012200754B2 (en) * 2008-10-08 2012-09-06 Gaztransport Et Technigaz Vessel with a reinforced corrugated membrane
AU2012201046B2 (en) * 2008-10-08 2012-09-06 Gaztransport Et Technigaz Vessel with a reinforced corrugated membrane
WO2012127141A1 (fr) * 2011-03-23 2012-09-27 Gaztransport Et Technigaz Element calorifuge pour paroi de cuve etanche et thermiquement isolante
CN103440355A (zh) * 2013-05-23 2013-12-11 上海飞机制造有限公司 Invar钢板多层多道焊接的变形模拟方法
CN104809291A (zh) * 2015-04-27 2015-07-29 江苏金通灵流体机械科技股份有限公司 一种基于ansys的双相不锈钢与异种钢焊接变形预测方法
WO2018069585A1 (fr) * 2015-10-13 2018-04-19 Gaztransport Et Technigaz Cuve étanche et thermiquement isolante
JP2018512344A (ja) * 2015-04-15 2018-05-17 ギャズトランスポルト エ テクニギャズ スルーエレメントが通る特定ゾーンを備えた壁を有するタンク
EP2383505B1 (fr) * 2010-04-27 2019-11-20 KAEFER Isoliertechnik GmbH & Co. KG Unité de fixation pour la fixation d'un élément d'isolation sur un récipient
FR3082275A1 (fr) * 2018-06-06 2019-12-13 Gaztransport Et Technigaz Cuve etanche et thermiquement isolante
RU2779509C2 (ru) * 2018-06-06 2022-09-08 Газтранспорт Эт Технигаз Теплоизоляционный герметичный резервуар
FR3121730A1 (fr) * 2021-04-09 2022-10-14 Gaztransport Et Technigaz Dispositif d’ancrage destiné à retenir des blocs isolants

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US5586513A (en) * 1994-09-20 1996-12-24 Gaztransport & Technigaz Watertight and thermally insulating tank built into a bearing structure
US6199497B1 (en) * 1998-07-10 2001-03-13 Gaz Transport Et Technigaz Watertight and thermally insulating tank with simplified insulating barrier built into the bearing structure of a ship

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KR840001031B1 (ko) * 1980-07-24 1984-07-26 가즈 트랜스포오트 선박의 운송 구조물과 일체로 형성시킨 방수단열 탱크
US5586513A (en) * 1994-09-20 1996-12-24 Gaztransport & Technigaz Watertight and thermally insulating tank built into a bearing structure
US6199497B1 (en) * 1998-07-10 2001-03-13 Gaz Transport Et Technigaz Watertight and thermally insulating tank with simplified insulating barrier built into the bearing structure of a ship

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7717289B2 (en) * 2006-09-01 2010-05-18 Korea Gas Corporation Anchor for liquefied natural gas storage tank
US7938287B2 (en) * 2006-09-01 2011-05-10 Korea Gas Corporation Structure for liquefied natural gas storage tank
FR2936784A1 (fr) * 2008-10-08 2010-04-09 Gaztransp Et Technigaz Cuve a membrane ondulee renforcee
WO2010040922A1 (fr) * 2008-10-08 2010-04-15 Gaztransport Et Technigaz Cuve a membrane ondulée renforcée
AU2012200754B2 (en) * 2008-10-08 2012-09-06 Gaztransport Et Technigaz Vessel with a reinforced corrugated membrane
AU2012201046B2 (en) * 2008-10-08 2012-09-06 Gaztransport Et Technigaz Vessel with a reinforced corrugated membrane
EP2383505B1 (fr) * 2010-04-27 2019-11-20 KAEFER Isoliertechnik GmbH & Co. KG Unité de fixation pour la fixation d'un élément d'isolation sur un récipient
WO2012127141A1 (fr) * 2011-03-23 2012-09-27 Gaztransport Et Technigaz Element calorifuge pour paroi de cuve etanche et thermiquement isolante
FR2973097A1 (fr) * 2011-03-23 2012-09-28 Gaztransp Et Technigaz Element calorifuge pour paroi de cuve etanche et thermiquement isolante
CN103440355A (zh) * 2013-05-23 2013-12-11 上海飞机制造有限公司 Invar钢板多层多道焊接的变形模拟方法
CN103440355B (zh) * 2013-05-23 2016-08-10 上海飞机制造有限公司 Invar钢板多层多道焊接的变形模拟方法
JP2018512344A (ja) * 2015-04-15 2018-05-17 ギャズトランスポルト エ テクニギャズ スルーエレメントが通る特定ゾーンを備えた壁を有するタンク
CN104809291A (zh) * 2015-04-27 2015-07-29 江苏金通灵流体机械科技股份有限公司 一种基于ansys的双相不锈钢与异种钢焊接变形预测方法
WO2018069585A1 (fr) * 2015-10-13 2018-04-19 Gaztransport Et Technigaz Cuve étanche et thermiquement isolante
JP2020079080A (ja) * 2015-10-13 2020-05-28 ギャズトランスポルト エ テクニギャズ 液密断熱タンク
JP7042855B2 (ja) 2015-10-13 2022-03-28 ギャズトランスポルト エ テクニギャズ 液密断熱タンク
EP4108976A1 (fr) * 2015-10-13 2022-12-28 Gaztransport Et Technigaz Cuve etanche et thermiquement isolante
FR3082275A1 (fr) * 2018-06-06 2019-12-13 Gaztransport Et Technigaz Cuve etanche et thermiquement isolante
WO2019234360A3 (fr) * 2018-06-06 2020-03-05 Gaztransport Et Technigaz Cuve etanche et thermiquement isolante
CN112639351A (zh) * 2018-06-06 2021-04-09 气体运输技术公司 绝热密封贮罐
RU2779509C2 (ru) * 2018-06-06 2022-09-08 Газтранспорт Эт Технигаз Теплоизоляционный герметичный резервуар
US11543078B2 (en) 2018-06-06 2023-01-03 Gaztransport Et Technigaz Thermally-insulating sealed tank
US11796131B2 (en) 2018-06-06 2023-10-24 Gaztransport Et Technigaz Thermally-insulating sealed tank
FR3121730A1 (fr) * 2021-04-09 2022-10-14 Gaztransport Et Technigaz Dispositif d’ancrage destiné à retenir des blocs isolants

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