Liquefied gas storage facility with tensioned secondary membrane

Abstract

To provide a liquefied gas storage facility in which a heat insulating block is easily mounted.SOLUTION: A secondary insulating barrier of a ceiling wall comprises a first secondary mounting support made of metal arranged in a corner region at the intersection of two edges of the loading opening, the ceiling wall comprising a first primary anchoring device attached to the first secondary mounting support, and a first corner primary insulating block (62) having a main portion (63) arranged along the first lateral edge and a protrusion (64) protruding from the main portion (63) beyond the first longitudinal edge in vertical alignment with the first secondary mounting support, the protrusion (64) having a support area, the first primary anchoring device comprising a support element (66) supported against the support area of the first boundary primary insulating block (51) and the support area of the first corner primary insulating block (62) in the direction of the upper support wall.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The present invention relates to the field of liquefied gas storage facilities equipped with a sealed heat-insulated tank provided with a sealed membrane.

[0002] In particular, the present invention relates to a sealed heat-insulated tank for storing and / or transporting liquefied gas at low temperatures, for example, a tank for transporting liquefied petroleum gas (also known as "LPG") at a temperature of, for example, -50°C to 0°C or a tank for transporting liquefied natural gas (LNG) at approximately -162°C at atmospheric pressure, etc. Such tanks can be installed on the shore or floating structures. In the case of floating structures, the above-mentioned tank can be used as a tank for transporting liquefied gas to be used as propulsion fuel for the tank or for receiving the liquefied gas.

[0003] The above storage facilities can be installed on the shore or floating structures. In the case of floating structures, the above facilities can be used for transporting liquefied gas, or can be used for containing liquefied gas used as propulsion fuel for the floating structure.

Background Art

[0004] WO 2023 / 001678 describes a liquefied gas storage facility having a tank incorporated in a support structure of a carrier ship. The tank has a multi-layer structure including, in the thickness direction from the outside to the inside, a secondary heat insulation barrier fixed to the support structure, a secondary sealing membrane attached to the secondary heat insulation barrier, a primary heat insulation barrier attached to the secondary heat insulation barrier via the secondary sealing membrane, and a primary sealing membrane attached to the primary heat insulation barrier and in contact with the liquefied gas stored in the tank. The secondary sealing membrane has a plurality of parallel strakes. Each strake has a flat central portion extending in the longitudinal direction of the tank and two raised edge portions disposed on both sides of the flat central portion and protruding toward the inside of the tank from the central portion. Such a secondary sealing membrane is generally referred to as a "tensioned membrane", which, unlike a corrugated membrane, cannot absorb longitudinal tensile or compressive forces.

[0005] The ceiling wall of the tank is interrupted at a cargo handling opening through which pipes for loading and / or unloading the liquefied gas pass. The secondary sealing membrane is provided to absorb tensile and compressive forces by abutting against the support structure using secondary connection brackets and being directly connected to the support structure. These tensile and compressive forces are particularly due to thermal shrinkage of the secondary sealing membrane and deformation of the hull of the carrier ship related to the warping of the carrier ship beam. To reduce the load on the secondary connection brackets described above, the secondary heat insulation barrier has a special structure along the front lateral edge portion, and this special structure particularly includes a plurality of secondary mounting support portions made of metal, and a secondary abutting beam to which the corresponding secondary connection brackets are attached is attached to the secondary mounting support portions. Primary heat insulation blocks are arranged along the lateral and longitudinal edge portions of the cargo handling opening. The primary heat insulation blocks are attached using primary anchor devices attached to the secondary heat insulation barrier and penetrating the secondary sealing membrane in a sealed state. SUMMARY OF THE INVENTION

[0006] One idea underlying the present invention is to provide a liquefied gas storage facility of the above-described type in which the primary heat insulation block at the corner region at the intersection of the longitudinal edge and the lateral edge of the loading opening can be easily attached.

[0007] In one embodiment, the present invention provides a liquefied gas storage facility including a support structure and a sealed heat insulation tank supported by the support structure. The support structure includes an upper support wall. The tank includes a ceiling wall attached to the upper support wall. The ceiling wall extends from the outside toward the inside in the thickness direction of the tank. a secondary heat insulation barrier attached to the upper support wall; a secondary sealing membrane disposed on the secondary heat insulation barrier; a primary heat insulation barrier disposed on the secondary sealing membrane; a primary sealing membrane disposed on the primary heat insulation barrier and contacting the liquefied gas; and includes: The ceiling wall is locally interrupted so as to define a loading opening through which a loading pipe passes. The loading opening is defined by a first lateral edge and a second lateral edge parallel to the lateral direction, and a first longitudinal edge and a second longitudinal edge parallel to the longitudinal direction perpendicular to the lateral direction. The secondary heat insulation barrier of the ceiling wall - a first secondary attachment support portion made of metal disposed in a corner region at the intersection of the first longitudinal edge and the first lateral edge; - a boundary secondary heat insulation block disposed along the first longitudinal edge and the first lateral edge; and includes: The ceiling wall includes a first primary anchor device attached to the first secondary attachment support portion. The primary heat insulation barrier of the ceiling wall - a first boundary primary heat insulation block disposed along the first longitudinal edge and including a support region; - a first corner primary heat insulation block, and is provided with The first corner primary heat insulation block has a main portion arranged along the first lateral edge, and a convex portion that is arranged vertically with the first secondary attachment support portion from the main portion and protrudes beyond the first longitudinal edge. The convex portion has a support region on the side of the first boundary primary heat insulation block. The first primary anchor device includes a support element that is supported in contact with the support region of the first boundary primary heat insulation block and the support region of the first corner primary heat insulation block in the direction of the upper support wall.

[0008] In this way, by the first primary anchor device, both the boundary primary heat insulation block arranged along the first longitudinal edge and the corner primary heat insulation block arranged along the lateral edge can be attached, thereby reducing the number of primary anchor devices required for attaching the primary heat insulation barrier and reducing the number of members passed through the secondary sealing membrane in a sealed state.

[0009] In a plurality of embodiments, the above equipment can include one or more of the following configurations.

[0010] In one embodiment, the support region of the first boundary primary heat insulation block is constituted by a batten.

[0011] In one embodiment, the primary heat insulation barrier includes at least one primary heat insulation panel adjacent to the first boundary primary heat insulation block, and the primary heat insulation panel has a support region where the support element is supported in contact in the direction of the upper support wall. With such a configuration, the number of primary anchor devices required for attaching the primary heat insulation barrier can be further reduced.

[0012] In one embodiment, the first primary anchor device is a screw shaft portion that penetrates through a hole formed in the secondary sealing membrane in a sealed state, and includes a screw shaft portion into which the support element is fitted. The first primary anchor device further includes a nut that is screwed onto the screw shaft portion so as to bring the support element into contact with and hold the support regions of the first boundary primary heat insulation block and the first corner primary heat insulation block.

[0013] In one embodiment, the first corner primary heat insulation block is constituted by a box filled with heat insulation stuffing.

[0014] In one embodiment, the support region of the convex portion is formed by battens.

[0015] In one embodiment, the first secondary mounting support portion includes a secondary base fixed to the upper support wall, and a secondary cap that is welded to the secondary base and extends in parallel to the longitudinal direction within a plane parallel to the upper support wall.

[0016] In one embodiment, the secondary base has two branch portions connected to each other by a central web, and the branch portions extend within a plane parallel to the lateral direction.

[0017] In one embodiment, the first secondary mounting support portion includes a plate piece attached to the secondary cap by a mounting member.

[0018] In one embodiment, the mounting member is adjustable so as to enable relative movement of the plate piece with respect to the secondary cap in the thickness direction of the ceiling wall.

[0019] In one embodiment, the screw shaft portion is attached to the plate piece.

[0020] In one embodiment, the secondary heat insulation barrier is at least one secondary abutment beam extending along the first lateral edge, and is disposed at least on one of the secondary cap of the first secondary mounting support portion and the boundary secondary heat insulation block, is disposed along the first lateral edge, and is provided immovably between the plate piece and the secondary cap in the thickness direction of the ceiling wall. The secondary heat insulation barrier includes a secondary abutment beam.

[0021] In an advantageous embodiment, the plate piece has a dual function of immobilizing the secondary abutment beam in the thickness direction of the ceiling wall and attaching the first primary anchor device to the first secondary mounting support portion. Thereby, the structure of the ceiling wall in the corner region of the cargo handling opening can be further simplified.

[0022] In one embodiment, a recess is provided at one end of the secondary abutment beam, and the plate piece is inserted into the recess so that the plate piece aligns with the inner surface of the secondary abutment beam. Thereby, the flatness of the support surface on which the first wing portion of the secondary connection bracket and the secondary sealing membrane are disposed can be ensured.

[0023] The first secondary mounting support portion includes an abutting member configured to block the straight movement of the secondary abutment beam in the longitudinal direction.

[0024] In one embodiment, the abutting member includes a plate piece attached to the secondary cap. The plate piece has tapped holes, the axes of these tapped holes are parallel to the longitudinal direction of the tank, and set screws are passed through each tapped hole. The set screws are in contact with and supported by the secondary abutment beam via a support bracket so as to press the secondary abutment beam against one end of the branch portion of the first secondary mounting support portion.

[0025] In one embodiment, the secondary sealing membrane is hermetically connected to the upper support wall along the first lateral edge using a secondary connection bracket. The secondary connection bracket includes a first wing portion extending in a horizontal plane and contacting the secondary abutment beam, and a second wing portion extending in a vertical plane and welded to an anchor flat region firmly fixed to the upper support wall.

[0026] In one embodiment, the secondary heat insulation barrier includes a plurality of secondary mounting support portions spaced along the first lateral edge, and the boundary secondary heat insulation block is sandwiched between two adjacent secondary mounting support portions along the lateral edge.

[0027] In one embodiment, the primary heat insulation barrier includes a plurality of boundary primary heat insulation blocks arranged along the first lateral end. A support region is provided at the end of each boundary primary heat insulation block. The ceiling wall includes a plurality of primary anchor devices. Each primary anchor device is attached to one of the secondary mounting support portions. The primary anchor device includes a support element disposed between two adjacent boundary primary heat insulation blocks. The support element contacts and is supported by one of the support regions of the two adjacent boundary primary heat insulation blocks in the direction of the upper support wall.

[0028] In one embodiment, the secondary heat insulation barrier is - a second secondary mounting support portion made of metal disposed in a corner region at the intersection of the second longitudinal edge and the first lateral edge; - a boundary secondary heat insulation block arranged along the second longitudinal edge; and includes The ceiling wall includes a second primary anchor device attached to the second secondary mounting support portion. The primary heat insulation barrier of the ceiling wall is - a second boundary primary heat insulation block arranged along the second longitudinal edge; - The second corner primary heat insulation block has a main portion arranged along the first lateral edge portion, and a convex portion that is arranged vertically with the second secondary attachment support portion from the main portion and protrudes beyond the first longitudinal edge portion. The convex portion has a support region on the side of the second boundary primary heat insulation block. The second primary anchor device includes a support element that is supported in contact with the support region of the second boundary primary heat insulation block and the support region of the second corner primary heat insulation block in the direction of the upper support wall.

[0029] In one embodiment, the secondary heat insulation barrier - A third secondary attachment support portion and a fourth secondary attachment support portion made of metal, which are respectively arranged in a corner region at the intersection of the first longitudinal edge portion and the second lateral edge portion, and a corner region at the intersection of the second longitudinal edge portion and the second lateral edge portion. are provided. The ceiling wall includes a third primary anchor device and a fourth primary anchor device attached to the third secondary attachment support portion and the fourth secondary attachment support portion. The primary heat insulation barrier of the ceiling wall - A third boundary primary heat insulation block and a fourth boundary primary heat insulation block respectively arranged along the first longitudinal edge portion and the second longitudinal edge portion. - A third corner primary heat insulation block and a fourth corner primary heat insulation block having a main portion arranged along the second lateral edge portion and a convex portion protruding from the main portion. are provided. The convex portion of the third corner primary heat insulation block protrudes beyond the first longitudinal edge portion and has a support region on the side of the third boundary primary heat insulation block. The third primary anchor device includes a support element that is supported in contact with the support region of the third boundary secondary heat insulation block and the support region of the third corner primary heat insulation block in the direction of the upper support wall. The convex portion of the fourth corner primary heat insulation block protrudes beyond the second longitudinal edge portion and has a support region on the side of the fourth boundary primary heat insulation block. The fourth primary anchor device includes a support element that is supported in contact with the support region of the fourth boundary primary heat insulation block and the support region of the fourth corner primary heat insulation block in the direction of the upper support wall.

[0030] In one embodiment, the first lateral end is in front of or behind the cargo opening.

[0031] In one embodiment, at least one upper batten is provided at each end of the boundary secondary heat insulation block arranged along the first longitudinal edge portion and the second longitudinal edge portion. The ceiling wall includes a second primary anchor device having a lower plate piece and an upper plate piece attached to each other by an adjustable mounting member. The lower plate piece and the upper plate piece sandwich the upper battens of two adjacent boundary secondary heat insulation blocks.

[0032] In one embodiment, at least one batten is provided at each end of the boundary primary heat insulation block. The second primary anchor device includes a screw shaft portion that penetrates the secondary sealing membrane in a sealed state, and a support element that is attached to the screw shaft portion and is supported in contact with the battens of two adjacent boundary primary heat insulation blocks.

[0033] The equipment of any of the above embodiments can be installed in, for example, coastal storage facilities such as those for LNG storage, or coastal or deep - sea floating structures, particularly LNG or ethane carriers, floating storage regasification units (FSRUs), remote floating production storage facilities (FPSOs), etc. In the case of a floating structure, the above - mentioned tank can be used to contain liquefied natural gas used as propulsion fuel for the floating structure.

[0034] In one embodiment, the present invention relates to a carrier for transporting fluids, which is equipped with the equipment having the above - described configuration.

[0035] In one embodiment, the carrier ship includes a double hull, and the double hull constitutes the support structure.

[0036] In one embodiment, the present invention also provides a system for transferring fluids, the system comprising the above-described carrier ship, a heat-insulating pipeline arranged to connect the tank of the carrier ship to a floating or coastal storage facility, and a pump for pumping the flow of fluid through the heat-insulating pipeline from the floating or coastal storage facility to the tank of the carrier ship or from the tank of the carrier ship to the floating or coastal storage facility.

[0037] In one embodiment, the present invention also provides a method for loading or discharging the above-described carrier ship, the method comprising sending fluid through a heat-insulating pipeline from a floating or coastal storage facility to the tank of the carrier ship or from the tank of the carrier ship to the floating or coastal storage facility.

[0038] By reading the following description of numerous specific embodiments of the present invention with reference to the accompanying drawings, the present invention can be better understood, and other objects, details, features, and advantages of the present invention will become clearer. The specific embodiments described below are merely illustrative and do not limit the present invention.

Brief Description of the Drawings

[0039]

Figure 1

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Embodiments for Carrying Out the Invention

[0040] Following the convention, the terms "outer" and "inner" are used to define the relative position of one member with respect to other members based on the outside and inside of the tank. Further, in each figure, arrow L corresponds to the longitudinal direction of the tank, and arrow T corresponds to the transverse direction of the tank, and these two directions are perpendicular to each other. In each illustrated embodiment, this is extended such that arrow L corresponds to the longitudinal direction of the carrier ship, and arrow T corresponds to the transverse direction of the carrier ship. This is because the orientation of the tank is the same as that of the carrier ship in each embodiment.

[0041] FIG. 1 is a view showing a carrier ship 70 for storing and transporting liquefied gas, which is, for example, an LNG carrier ship. The carrier ship 70 is provided with a storage facility 1, and the storage facility 1 includes a plurality of tanks 71 arranged on the inner hull of the carrier ship. To achieve this, the inner hull has a plurality of polyhedral compartments defined by a plurality of support walls, and each compartment is configured to form a support structure for accommodating one tank 71 of the carrier ship 1. The inner hull is provided with cofferdam support walls extending transversely with respect to the longitudinal direction L of the carrier ship 70, and these cofferdam support walls define a cofferdam space that divides the inner hull into a plurality of compartments.

[0042] Each tank 71 has a polyhedral shape and includes a plurality of tank walls assembled with each other and fixed to the support walls. These tank walls are particularly the ceiling wall 4, the rear cofferdam wall 82, and the front cofferdam wall 83. The front cofferdam wall 83 and the rear cofferdam wall 82 are spaced apart in the longitudinal direction L of the carrier ship 70, and the front cofferdam wall 83 is fixed to one of the two cofferdam support walls, and the rear cofferdam wall 82 is fixed to the other cofferdam support wall, respectively.

[0043] In order to perform the loading and unloading operation of liquefied gas on the tank, a loading and unloading opening (not shown in FIG. 1) is formed in the ceiling wall 4, and a pipe for performing the loading and unloading operation of liquefied gas is passed through this loading and unloading opening. The loading and unloading opening is provided in the vicinity of the rear cofferdam wall 82 (region II in FIG. 1) on the ceiling wall 4.

[0044] The upper support wall of the support structure 2 also has holes for passing pipes through the support structure 2. The cargo handling opening serves as an inlet point for a plurality of components of the device for handling liquefied natural gas, and in particular, is used as one or more inlet points among a filling line, an emergency pumping line, a discharge line connected to a discharge pump, a spray line, a supply line connected to a spray pump, etc. In one embodiment, a cargo handling tower (not shown) is passed through the cargo handling opening. This loading tower includes a plurality of vertical masts, and these masts are attached to each other by crossbars. Since the vertical masts are hollow, each mast serves as a loading line, a loading line, or a relief well for recessing the relief well.

[0045] Figure 2 is a perspective view of the region near the cargo handling opening 14 of the ceiling wall 4 as seen from inside the tank. The cargo handling opening 14 is rectangular and is defined by two longitudinal edges 5 parallel to the longitudinal direction L of the tank and two transverse edges 6 parallel to the transverse direction.

[0046] Figure 3 shows the multi-layer structure of the ceiling wall 4. The ceiling wall 4 includes, in order from the outside to the inside of the tank in the thickness direction, a secondary heat insulation barrier 7 held by the upper support wall 8, a secondary sealing membrane 9 installed on the secondary heat insulation barrier 7, a primary heat insulation barrier 10 installed on the secondary sealing membrane 9, and a primary sealing membrane 11 installed on the primary heat insulation barrier 10 and in contact with the liquefied natural gas entering the tank.

[0047] The secondary heat insulation barrier 7 includes a plurality of secondary heat insulation panels 12, and these secondary heat insulation panels 12 are fixed to the upper support wall 8 by secondary anchor devices (not shown in Figure 3). The overall shape of the secondary heat insulation panel 12 is parallelepiped-shaped, and these plurality of secondary heat insulation panels 12 are arranged in a plurality of parallel rows in the longitudinal direction L and the transverse direction T, for example.

[0048] The secondary sealing membrane 9 of the ceiling wall 4 comprises a continuous layer formed by connecting a plurality of metal strakes, and these strakes have raised edges. Each strake extends in the longitudinal direction L and has a flat central portion installed on the secondary heat insulation panel 12. Further, each strake has two raised edges arranged on both sides of the flat central portion, and the raised edges protrude toward the inside of the tank from the central portion. The strakes are welded to a plurality of parallel welding supports at the raised edges, and these welding supports are attached in grooves formed on the inner surface of the secondary heat insulation panel 12, that is, the surface in contact with the secondary sealing membrane 9. The strakes are made of, for example, Invar (registered trademark) which is an alloy of iron and nickel or an alloy of iron and manganese. The expansion coefficient of Invar (registered trademark) of the alloy of iron and nickel is typically 1×10 -6 ~2×10 -6 K -1 and the expansion coefficient of the alloy of iron and manganese is typically 7×10 -6 ~9×10 -6 K -1 .

[0049] The primary heat insulation barrier 10 comprises a plurality of primary heat insulation panels 13, and these primary heat insulation panels 13 are fixed to the secondary heat insulation panel 12 using a primary anchor device. This primary anchor device is not shown in FIG. 3. The overall shape of the primary heat insulation panel 13 is parallelepiped. The primary heat insulation panel 13 can be arranged so as to be offset with respect to the secondary heat insulation panel 12 in the longitudinal direction L, and optionally, can also be arranged so as to be offset with respect to the secondary heat insulation panel 12 in the transverse direction T.

[0050] In one embodiment, the secondary heat insulation panel 12 and the primary heat insulation panel 13 have a bottom plate, a cover plate, and one or a plurality of layers of heat-insulating polymer foams sandwiched between the bottom plate and the cover plate and attached to the cover plate. The heat-insulating polymer foam can be particularly a polyurethane-based foam, and can be optionally reinforced with fibers, particularly reinforced with glass fibers.

[0051] The primary sealing membrane 11 includes a plurality of corrugated metal plates that are arranged side by side in the longitudinal direction L and the transverse direction T and welded to each other at their edges. The primary sealing membrane 11 includes a plurality of corrugations extending parallel to the longitudinal direction L and a plurality of corrugations extending parallel to the transverse direction T.

[0052] To form the loading opening 14, the ceiling wall 4 is locally interrupted. Thus, the sealing membrane is interrupted all around the loading opening 14 for both the primary sealing membrane 11 and the secondary sealing membrane 9, as well as for both the primary heat insulation barrier 10 and the secondary heat insulation barrier 7.

[0053] Referring again to FIG. 2, a cover 15 arranged within the loading opening 14 is shown in the figure. The cover 15 includes a metal sealing wall 16 and a heat insulation structure 17 located between the metal sealing wall 16 and the upper support wall 8. The cover 15 is attached to the upper support wall 8. The metal sealing wall 16 realizes the sealing continuity with the primary sealing membrane 11 of the ceiling wall 4, and the heat insulation structure 17 realizes the heat insulation continuity.

[0054] The heat insulation structure 17 includes one or more cover heat insulation blocks, and the cover heat insulation blocks are, for example, in the form of a box having a bottom plate, a cover plate, and support spacers. The support spacers extend between the bottom plate and the cover plate in the thickness direction and define a plurality of compartments filled with a heat insulation filler such as perlite, glass wool, or rock wool. The one or more cover heat insulation blocks have one or more holes (not shown) for passing the loading pipe.

[0055] The metal sealing wall 16 of the cover 14 includes, for example, a structure formed by welding a plurality of metal plates to each other. The metal sealing wall 16 is further provided with a plurality of cover holes (not shown) for passing the loading pipe. As shown in FIG. 2, the metal connection strip 18 can be used to connect the metal sealing wall 16 of the cover 14 and the primary sealing membrane 11 of the ceiling wall 4 so as to seal them.

[0056] The primary sealing membrane 11 is connected to the metal sealing wall 16 of the cover 14 at the loading and unloading opening 14. On the other hand, the secondary sealing membrane 9 is interrupted at the longitudinal edge 5 and the transverse edge 6 of the loading and unloading opening 14. To seal the gap between the secondary heat insulation barrier 7 and the cover 14, the secondary sealing membrane 9 is directly connected so as to be sealed to the upper support wall 8. This connection is made by a secondary connection bracket 19, which can be particularly seen in FIG. 3. The secondary connection bracket 19 includes a first wing portion 20 and a second wing portion 21 connected to the first wing portion 20. The first wing portion 20 extends in a horizontal plane and is connected to the secondary sealing membrane 9, while the second wing portion 21 extends in a vertical plane and is welded to an anchor flat region 22 firmly fixed to the upper support wall 8. Therefore, a part of the strake of the secondary sealing membrane 9 is interrupted by the loading and unloading opening 14 and is connected to the upper support wall 8.

[0057] The secondary sealing membrane 9 can transmit the tensile force related to the operation of the secondary sealing membrane 9 to the secondary connection bracket 19 at the connection location with the upper support wall 8, especially when the tank is cooled. Furthermore, in order to reduce the load on the secondary connection bracket 19 and the load on the welded part with the secondary sealing membrane 9, the secondary heat insulation barrier 7 has a special arrangement structure along the transverse edge 6 of the loading and unloading opening 14.

[0058] A part of the special arrangement structure of the secondary heat insulation barrier 7 along one of the transverse edges 6 is shown in FIG. 4. The secondary heat insulation barrier 7 includes a plurality of secondary mounting support portions 23, which are regularly distributed along the transverse edge 6 of the loading and unloading opening 14 and are spaced apart from each other in the transverse direction T, and are also welded to the upper support wall 8.

[0059] One of the above-described secondary attachment support portions 23 is shown in FIG. 5. Each secondary attachment support portion 23 includes a secondary cap 24 that extends parallel to the longitudinal direction in a plane parallel to the ceiling wall 4. The secondary cap 24 is joined, for example, by welding to a secondary base 25 fixed to the upper support wall 8. The secondary base 25 has two branch portions 26, 27, and these branch portions 26, 27 are connected to each other by a central web 28. The two branch portions 26, 27 described above are welded to both ends of the secondary cap 24 and extend parallel to each other in a plane parallel to the lateral direction and parallel to the thickness direction of the ceiling wall 4. The central web 28 extends in a plane parallel to the longitudinal direction and parallel to the thickness direction of the ceiling wall 4. The central web 28 is welded to the secondary cap 24 and the two branch portions 26, 27. In the illustrated embodiment, the central web 28 is U-shaped. The distance between the two branch portions 26, 27 in the longitudinal direction L determines the base length, and rocking or bending of the secondary connection bracket 19 in this direction can be avoided.

[0060] The secondary attachment support portion 23 supports a primary anchor device 29 for fixing the secondary heat insulation barrier 10. The primary anchor device 29 is attached to a plate piece 30, and the plate piece 30 is attached to the secondary cap 24 by an attachment member 31 such as a screw. The longitudinal direction of the plate piece 30 is parallel to the longitudinal direction of the tank.

[0061] Furthermore, a screw shaft portion 32 is attached to the plate piece 30, and this screw shaft portion 32 extends toward the inside of the tank in the thickness direction. The screw shaft portion 32 penetrates through the hole formed in the secondary sealing membrane 9 so as to seal it. The primary anchor device 29 further includes a support element 33, and this support element 33 is supported in the support region of the boundary primary heat insulation block 51 of the primary heat insulation barrier 10 shown particularly in FIG. 3, and these boundary primary heat insulation blocks 51 are arranged along the lateral edge 6 of the handling opening 14. In the illustrated embodiment, the support region of the boundary primary heat insulation block 51 is formed, for example, by battens attached to the end portion of the boundary primary heat insulation block 51.

[0062] Also, the primary anchor device 29 includes a nut 34, which can be seen particularly in FIG. 5. The nut 34 interacts with the threaded portion of the screw shaft portion 32 and, together with at least one Belleville washer 35 attached to the screw shaft portion 32 and sandwiched between the nut 34 and the support element 33, attaches the support element 33 to the screw shaft portion 32. The primary anchor device 29 further includes a flange 36 arranged around the screw shaft portion 32, and the flange 36 is welded to the secondary sealing membrane 9 so as to seal around the entire circumference of the hole through which the screw shaft portion 32 passes.

[0063] Referring to FIG. 4 again, it can be seen that the secondary heat insulation barrier 7 also includes boundary secondary heat insulation blocks 37 along the lateral edge 6. Each boundary secondary heat insulation block 37 is sandwiched between two adjacent secondary mounting support portions 23. The boundary secondary heat insulation blocks 37 are preferably joined to the upper support wall 8 by adhesion, for example, using mastic. The boundary secondary heat insulation blocks 37 are constituted, for example, by a wooden box filled with heat insulating materials such as perlite, glass wool, or rock wool.

[0064] The secondary heat insulation barrier 7 further includes a secondary abutting beam 38, and the first wing portion 20 of the secondary connection bracket 19 is attached to the secondary abutting beam 38. The secondary abutting beam 38 is made of wood, for example, and the secondary abutting beam 38 also helps to fix the boundary secondary heat insulation block 37 to the upper support wall 8. In this way, the secondary abutting beam 38 is sandwiched between the boundary secondary heat insulation block 37 and the first wing portion 20 of the secondary connection bracket 19 in the thickness direction.

[0065] Each of the secondary abutting beams 38 is attached so as to straddle two secondary mounting support portions 23. In the illustrated embodiment, the central portion of the secondary abutting beam 38 is also attached to the secondary mounting support portion 23. In order to attach the secondary abutting beam 38, the end portion of the secondary abutting beam 38 is sandwiched between the plate piece 30 and the secondary cap 24. In this way, since the attachment member 31 is adjustable, the end portion of the secondary abutting beam 38 cannot move between the plate piece 30 and the secondary cap 24 in the thickness direction of the ceiling wall.

[0066] As shown in FIG. 7, the secondary abutting beam 38 has a recess 39 for receiving the plate piece 30, and the plate piece 30 is received in the recess 39 so that the plate piece 30 substantially aligns with the inner surface of the secondary abutting beam 38. Thereby, the flatness of the support surface on which the first wing portion 20 of the secondary connection bracket 19 and the secondary sealing membrane 9 are arranged can be ensured.

[0067] Advantageously, the secondary abutting beam 38 can also include one or more metal reinforcements 40 in a ready-made state, whereby the rigidity can be improved. The metal reinforcements 40 are, for example, a plurality of metal strips in a direction parallel to the length direction of the secondary abutting beam 38, that is, in the lateral direction of the tank. The metal reinforcements 48 can be attached to the secondary abutting beam 38 by any means, in particular by fixing screws, by adhesion, or by riveting.

[0068] In an advantageous embodiment, a mastic bead or strip (not shown) is disposed between the secondary abutment beam 38 and the boundary secondary insulation block 37 and / or the secondary cap 24 of the secondary mounting support portion 23. Thereby, the position of the secondary abutment beam 38 in the thickness direction of the ceiling wall 4 can be adjusted.

[0069] As shown in FIG. 7, the secondary abutment beam 38 also includes a metal L-shaped support bracket 41. The support bracket 41 functions as a support portion of the abutting member 42 as can be seen from FIGS. 4 to 6, and this will be described below. Since the support bracket 41 is harder than the secondary abutment beam 38, the support bracket 41 can prevent the secondary abutment beam 38 from being recessed in the region where it contacts the abutting member 42. The secondary abutment beam 38 further has a notch 43, and the notch 43 is for inserting the abutting member 42 when the secondary abutment beam 38 is disposed so as to contact the secondary mounting support portion 23. Each support bracket 41 has a first tab 44 received so as to contact the outer surface of the secondary abutment beam 38 and a second tab 45 received so as to contact the edge of any one of the notches 43. The support bracket 41 can be attached to the secondary abutment beam 38 by any means, and in particular, it can be attached by fixing screws, by adhesion, or by rivet bonding.

[0070] Furthermore, as shown in FIG. 6, each secondary abutment beam 38 is blocked from rectilinear movement in the longitudinal direction L in the secondary mounting support portion 23 that interacts with itself. To do this, each secondary mounting support portion 23 is provided with an abutting tool 42 attached to the secondary cap 24. The abutting tool 42 includes a plate 43 perpendicularly attached to the secondary cap 24 by welding. In the illustrated embodiment, a reinforcing member in the form of a gusset 46 is welded between the plate 43 and the secondary cap 24 to reinforce the rigidity of the abutting tool 42. The plate 43 has two tapped holes, the axes of these tapped holes are parallel to the longitudinal direction L of the tank, and set screws 44 are respectively passed through each tapped hole. Each set screw 44 is supported in contact with one support bracket 41, and such a configuration has the effect of pressing the corresponding secondary abutment beam 38 against one end 45 of the branch portion 27, whereby the secondary abutment beam 38 can be prevented from rectilinear movement in the longitudinal direction.

[0071] In this way, the secondary abutment beam 38 is firmly supported by the secondary mounting support portion 23 in both the longitudinal direction L and the thickness direction of the ceiling wall 4, whereby it becomes possible to absorb such tensile or compressive forces by the secondary sealing membrane 9 during operation.

[0072] As shown in FIG. 4, the secondary heat insulation barrier 7 includes a covering plate 47, and the covering plate 47 is placed in a ledge formed in the secondary abutment beam 38 and covers the notch 43 for placing the abutting tool 42. The covering plate 47 ensures that the support surface for supporting the secondary sealing membrane 9 is flat.

[0073] With reference to FIG. 8 below, the arrangement of the primary heat insulation barrier 10 and the secondary heat insulation barrier 7 along the longitudinal edge portion 5 of the loading opening 14 will be described. The secondary heat insulation barrier 7 includes a plurality of boundary secondary heat insulation blocks 48, which are arranged along the longitudinal edge portion 5 of the loading opening 14. Similarly, the primary heat insulation barrier 10 includes a plurality of boundary primary heat insulation blocks 51 arranged along the longitudinal edge portion 5.

[0074] The boundary secondary heat insulation block 48 is provided with at least two battens, namely a lower batten 49 and an upper batten 50, along its longitudinal ends. These are attached to the longitudinal ends of the boundary secondary heat insulation block 48, and both battens are made of, for example, wood. A batten 52 is also provided at the end of the boundary primary heat insulation block 51.

[0075] The lower batten 49 is for fixing the boundary secondary heat insulation block 48 to the upper support wall 8 using a secondary anchor device (not shown). In one embodiment, the secondary anchor device includes a shaft portion welded to the support structure and provided between two adjacent boundary secondary heat insulation blocks 48, and a support element attached to the shaft portion. The support element is supported in contact with the lower battens 49 of two adjacent boundary secondary heat insulation blocks 48. The secondary anchor device also includes a nut and a Belleville washer. The nut interacts with the threaded portion of the shaft portion to attach the support element to the shaft portion, and the Belleville washer is attached to the shaft portion between the nut and the support element.

[0076] As shown in FIG. 8, the upper batten 50 is for fixing the boundary primary heat insulation block 51 using a primary anchor device 53. The primary anchor device 53 includes an upper plate piece 54 and a lower plate piece 55, which are attached to each other using an adjustable mounting member such as a screw. The plate pieces, both the upper plate piece 54 and the lower plate piece 55, are arranged such that the mounting member passes through the gap between the upper battens 50 of two adjacent boundary secondary heat insulation blocks 48, and the upper batten 50 is sandwiched between the upper plate piece 54 and the lower plate piece 55.

[0077] The primary anchor device 53 includes a screw shaft portion 56 attached to the upper plate piece 54, and this screw shaft portion 56 extends inwardly of the tank in the thickness direction. The screw shaft portion 56 is configured to penetrate through the hole of the secondary sealing membrane 9 so as to seal it. The primary anchor device 53 also includes a support element 57 fitted onto the screw shaft portion 56. The primary anchor device 53 also includes a nut 58 and a Belleville washer 59. The nut 58 interacts with the threaded portion of the screw shaft portion 56 so as to attach the support element to the screw shaft portion 56, and the Belleville washer 59 is attached to the screw shaft portion 56 between the nut 58 and the support element 57.

[0078] In the embodiment shown in FIG. 8, the primary anchor devices 53 arranged along the longitudinal edge portion 5 of the loading opening 14 are each for fixing two boundary primary heat insulation blocks 51 and two primary heat insulation panels 60. To do this, the longitudinal edge portion of the primary heat insulation panel 60 adjacent to the boundary primary heat insulation block 51 along the longitudinal edge portion 5 of the loading opening 14 is aligned with the longitudinal end portion of the boundary primary heat insulation block 51. Further, the primary heat insulation panel 60 is arranged so as to straddle the boundary secondary heat insulation block 48 and the adjacent secondary heat insulation panel 61.

[0079] In this way, the support element 57 of the primary anchor device 53 is arranged in the space between the corner portions of the two boundary primary heat insulation blocks 51 and the corner portions of the two adjacent primary heat insulation panels 60. Each support element 57 is supported in contact with the two battens 52 of the two boundary primary heat insulation blocks 51 and the support regions of the two adjacent primary heat insulation panels 60. The support region of the primary heat insulation panel 60 is preferably constituted by the portion of the rigid outer plate that protrudes with respect to the rigid inner plate and the layer of the heat insulating polymer foam. In the illustrated embodiment, the longitudinal dimension of the support region of the primary heat insulation panel 60 is larger than the longitudinal dimension of the batten of the heat insulating box. The support element 57 is generally T-shaped.

[0080] In other embodiments (not shown), the boundary secondary heat insulation block 48 is wide, that is to say, it has a large lateral dimension. The boundary secondary heat insulation block 48 is provided with two lower battens and two upper battens at each of its ends. One of the upper battens is used to attach a primary anchor device for fixing two adjacent boundary primary heat insulation blocks, while the other upper batten is used to attach another primary anchor device for fixing one or more primary heat insulation panels 60.

[0081] In another embodiment (not shown), two rows of the boundary secondary heat insulation blocks 48 are arranged along each longitudinal edge 5 of the cargo handling opening 14. Therefore, the boundary primary heat insulation blocks are fixed to one of the two rows of the boundary secondary heat insulation blocks by using the primary anchor device as described above, and the primary heat insulation panels 60 adjacent to the longitudinal edge 5 are fixed to the other row of the two rows of the boundary secondary heat insulation blocks by using the primary anchor device as described above.

[0082] With reference to FIGS. 9 to 12, the arrangement configuration of the primary heat insulation barrier 10 and the secondary heat insulation barrier 7 in the corner region at the intersection of the lateral end 6 and the longitudinal edge 5 of the cargo handling opening 14 will be described.

[0083] As shown in FIG. 9, the secondary attachment support portion 23 described above with reference to FIG. 5 is arranged in each corner region of the cargo handling opening 14. In this example, the secondary attachment support portion 23 is also aligned with the boundary secondary heat insulation block 37 arranged along the lateral edge 6, similar to the boundary secondary heat insulation block 37 arranged along the longitudinal edge 5.

[0084] The primary heat insulation barrier 10 includes, in each corner region of the handling opening 14, a corner primary heat insulation block 62 of the first embodiment shown in FIGS. 10 to 12. The corner primary heat insulation block 62 has a rectangular parallelepiped main portion 63 and a convex portion 64 protruding laterally from the main portion 63. The longitudinal dimension of the convex portion 64 is smaller than the longitudinal dimension of the main portion 63. A batten 65 is provided on the convex portion 64. The corner primary heat insulation block 62 is preferably composed of a wooden box filled with a heat insulating material such as perlite, glass wool, or rock wool.

[0085] The main portion 63 of the first corner primary heat insulation block 62 is arranged along the lateral edge portion 6, and the convex portion 64 protrudes beyond the longitudinal edge portion and is arranged to be aligned vertically with the secondary mounting support portion 23. More specifically, it is arranged below the secondary mounting support portion 23, and the boundary primary heat insulation block 51 arranged along the longitudinal edge portion 5 is in an aligned state. The batten 65 is arranged to contact the surface of the convex portion 64 facing the boundary primary heat insulation block 51 arranged along the longitudinal edge portion 5. As shown in FIG. 11, the screw shaft portion 32 of the primary anchor device 29 protrudes between the convex portion 64 of the corner primary heat insulation block 62 and the adjacent boundary primary heat insulation block 51.

[0086] As shown in FIG. 12, the support element 66 attached to the screw shaft portion 32 is supported so as to be in contact with the batten 51 of the convex portion 64 and the batten of the boundary primary heat insulation block 51. More preferably, one or more primary heat insulation barriers 60 of the primary heat insulation barrier 60 adjacent to the boundary primary heat insulation block along the longitudinal edge 5 of the handling opening 14 are provided with support surfaces 68, 69 for contacting and supporting the support element 66. The reason why such an arrangement is particularly advantageous is that each primary anchor device 29 attached to the secondary mounting support portion 23 arranged in the corner region can attach both the boundary primary heat insulation block 51 arranged along the longitudinal edge 5 and the corner primary heat insulation block 62 arranged along the lateral edge 6. Thereby, the number of primary anchor devices 29 can be suppressed, and the number of members passed through the secondary sealing membrane 9 in a sealed state can be suppressed.

[0087] As shown in FIG. 12, the support element 66 of the primary anchor device 29 attached to the secondary mounting support portion 23 arranged in the corner region is disposed in the space between the convex portion 64 of the corner primary heat insulation block 62, the boundary primary heat insulation block 51 arranged along the longitudinal edge 5 of the handling opening 14, and the support regions 68, 69 of one or both of the two adjacent primary heat insulation barriers 60. In this way, the support element 66 is supported in contact with the batten 65 of the convex portion 64 of the corner primary heat insulation block 62, the batten 67 attached to the longitudinal end of the boundary primary heat insulation block 51 arranged along the longitudinal edge 5, and the support regions 68, 69 of the two adjacent primary heat insulation barriers 60.

[0088] FIGS. 13 to 15 show the corner primary heat insulation block 62 of the second embodiment.

[0089] Compared with the first embodiment, in the second embodiment, as can be seen from FIG. 13, the batten 65 of the convex portion 64 is extended so as to extend over most of the length of the convex portion 64.

[0090] FIG. 14 is a view showing the situation of the corner primary heat insulation block 62 of the second embodiment with the boundary primary heat insulation block 51 omitted for easy viewing. Similar to the first embodiment, the support element 66 of the primary anchor device 29 attached to the secondary mounting support portion 23 arranged in the corner region is disposed in the space between the convex portion 64 of the corner primary heat insulation block 62 and the boundary primary heat insulation block 51 arranged along the longitudinal edge portion 5 of the cargo handling opening 14.

[0091] As can be seen from FIG. 15, in the second embodiment, different from the first embodiment, the above support element 66 is supported in contact only with the batten 65 of the convex portion 64 of the corner primary heat insulation block 62 and the batten 67 attached to the longitudinal end of the boundary primary heat insulation block 51 arranged along the longitudinal edge portion 5. Specifically, in this embodiment, the support element 66 is shorter and is not disposed in contact with the support surfaces of two adjacent primary heat insulation barriers 60.

[0092] Referring to FIG. 16, a view of a part of the LNG carrier 70 cut away shows a hermetic heat insulation tank 71 having an overall shape of a prism installed inside the double hull 72 of the carrier. The wall of the tank 71 includes a primary hermetic barrier in contact with the LNG contained in the tank, a secondary hermetic barrier disposed between the primary hermetic barrier and the double hull 72 of the carrier, and two heat insulation barriers respectively disposed between the primary hermetic barrier and the secondary hermetic barrier and between the secondary hermetic barrier and the double hull 72.

[0093] Obviously, in order to transfer the LNG cargo to or from the tank 71, an appropriate connector can be used to connect the cargo handling pipeline 73 arranged on the upper deck of the carrier to the sea or the port terminal.

[0094] FIG. 16 shows an example of an offshore terminal including a cargo handling station 75, a submarine pipe 76, and coastal facilities 77. The cargo handling station 75 is a fixed offshore facility including a movable arm 74 and a tower 78 that supports the movable arm 74. The movable arm 74 supports a bundle of heat-insulated flexible pipes 79 connectable to a cargo handling pipeline 73. This movable arm 74, whose direction can be adjusted, can be adjusted to fit LNG carriers of all sizes. Inside the tower 78, a connection pipe (not shown) extends. The cargo handling station 75 can perform discharging from the LNG carrier 70 to the coastal facilities 77 and loading from the coastal facilities 77 to the carrier 70. The coastal facilities 77 include a tank 80 for storing liquefied gas and a connection pipe 81 connected to the cargo handling station 75 via the submarine pipe 76. The submarine pipe 76 is for transferring liquefied gas over a long distance, e.g., about 5 km, between the cargo handling station 75 and the coastal facilities 77, thereby enabling the LNG carrier 70 to be maintained at a location far from the coast during cargo handling operations.

[0095] To generate the pressure required for the transfer of liquefied gas, pumps mounted on the carrier 70 and / or pumps installed in the coastal facilities 77 and / or pumps installed in the cargo handling station 75 are used.

[0096] Although the present invention has been described with reference to a plurality of specific embodiments, the present invention is not limited to these specific embodiments at all, and it is obvious that all technical equivalents of the above means and technically equivalent combinations of the above means are included in the present invention as long as they belong to the scope of the present invention.

[0097] The use of the verb "include" or "comprise" and its conjugate forms does not exclude the existence of elements or steps other than those recited in the claims.

[0098] In the claims, any bracketed reference signs shall not be construed as limiting the claims.

Claims

1. A liquefied gas storage facility comprising a support structure (2) and a sealed insulated tank (71) supported by the support structure (2), The support structure (2) is equipped with an upper support wall (8), The sealed insulated tank (71) is equipped with a ceiling wall (4) attached to the upper support wall (8), The ceiling wall (4) extends from the outside to the inside in the thickness direction of the sealed insulated tank. A secondary heat insulating barrier (7) attached to the upper support wall (8), The secondary sealing membrane (9) is placed in the secondary insulating barrier (7), The primary insulating barrier (10) is placed in the secondary sealing membrane (9), A primary sealing membrane (11) is placed in the primary insulating barrier (10) and comes into contact with the liquefied gas, It is equipped with, The aforementioned ceiling wall (4) is locally interrupted to define a cargo handling opening (14) through which a cargo handling pipe passes. The loading / unloading opening (14) is defined by a first lateral edge and a second lateral edge (6) parallel to the lateral direction (T), and a first longitudinal edge and a second longitudinal edge (5) parallel to the longitudinal direction (L) perpendicular to the lateral direction (T). The secondary insulation barrier (7) of the ceiling wall (4) is A first secondary mounting support portion (23) made of metal is positioned in the corner region at the intersection of the first longitudinal edge and the first transverse edge, Boundary secondary insulation blocks (37, 48) arranged along the first longitudinal edge and the first transverse edge, It is equipped with, The ceiling wall (4) is equipped with a first primary anchor device (29) attached to the first secondary mounting support portion (23), The primary thermal insulation barrier (10) of the ceiling wall (4) is A first boundary primary insulating block (51) is arranged along the first longitudinal edge and has a support area (67), The first corner primary insulation block (62) and It is equipped with, The first corner primary insulation block (62) has a main portion (63) arranged along the first lateral edge and a protrusion (64) extending from the main portion (63) perpendicular to the first secondary mounting support portion (23) and beyond the first longitudinal edge. The protrusion (64) has a support region (64) on the side of the first boundary primary insulation block (51), The liquefied gas storage facility is characterized in that the first primary anchor device (29) includes a support element (66) that is supported in contact with the support area (67) of the first boundary primary insulation block (51) and the support area (65) of the first corner primary insulation block (62) in the direction of the upper support wall (8).

2. The primary insulation barrier (10) comprises at least one primary insulation panel (60) adjacent to the first boundary primary insulation block (51), The primary insulation panel (60) has a support region (69) in which the support element (66) is supported in contact with the upper support wall (8), The liquefied gas storage facility according to claim 1.

3. The primary thermal barrier (10) is adjacent to the first boundary primary thermal block (51). It is equipped with at least one primary insulation panel (60), The support element (66) is positioned away from the primary insulation panel (60) adjacent to the first boundary primary insulation block (51) so as to be supported only in contact with the support area (67) of the first boundary primary insulation block (51) and the support area (65) of the first corner primary insulation block (62). The liquefied gas storage facility according to claim 1.

4. The first primary anchor device (29) is a screw shaft portion (32) into which the support element (66) is fitted, and the screw shaft portion (32) penetrates in a sealed state through a hole formed in the secondary sealing membrane (9), The first primary anchor device (29) further includes a nut (34) that is screwed onto the screw shaft portion (32) so as to hold the support element (66) in contact with the support area of ​​the first boundary primary insulated block (51) and the support area of ​​the first corner primary insulated block (62). A liquefied gas storage facility according to any one of claims 1 to 3.

5. The first corner primary insulation block (62) is composed of a box filled with insulating material. The support area of ​​the aforementioned protrusion (64) is formed by a cross shape. A liquefied gas storage facility according to any one of claims 1 to 3.

6. The first secondary mounting support portion (23) comprises a secondary base (25) fixed to the upper support wall (8), and a secondary cap (24) welded to the secondary base (25) and extending parallel to the longitudinal direction in a plane parallel to the upper support wall (8). A liquefied gas storage facility according to any one of claims 1 to 3.

7. The secondary base (25) has two branch sections (26, 27) connected to each other by a central web (28), The branch portions (26, 27) extend in a plane parallel to the lateral direction. The liquefied gas storage facility according to claim 6.

8. The first secondary mounting support portion (23) includes a plate piece (30) attached to the secondary cap (24) by a mounting member (31). The liquefied gas storage facility according to claim 6.

9. The first corner primary insulation block (62) is composed of a box filled with insulating material, The support region of the aforementioned protrusion (64) is formed by a cross shape. The screw shaft portion (32) is attached to the plate piece (30). The liquefied gas storage equipment according to claim 8.

10. The secondary thermal insulation barrier (7) comprises at least one secondary abutment beam (38) extending along the first lateral edge, which is positioned at least on one of the secondary caps (24) of the first secondary mounting support portion (23) and the boundary secondary thermal insulation block (37), and is positioned along the first lateral edge and is immovably provided between the plate piece (30) and the secondary cap (24) in the thickness direction of the ceiling wall. The liquefied gas storage equipment according to claim 8.

11. A recess (39) is provided at one end of the secondary contact beam (38), The plate piece (30) is placed in the recess (39) such that it is aligned with the inner surface of the secondary contact beam (38). The liquefied gas storage equipment according to claim 10.

12. The first secondary mounting support portion (23) includes a contact device (42) configured to block the secondary contact beam from moving in a straight line in the longitudinal direction. The liquefied gas storage equipment according to claim 10.

13. The secondary sealing membrane (9) is connected in a sealed state to the upper support wall (8) along the first lateral edge using a secondary connecting bracket (19). The secondary connecting bracket (19) comprises a first wing portion (20) extending in a horizontal plane and in contact with the secondary contact beam (38), and a second wing portion (21) extending in a vertical plane, which is welded to an anchor flat region (22) that is firmly fixed to the upper support wall (8). The liquefied gas storage equipment according to claim 10.

14. The secondary heat insulating barrier (7) is provided with a plurality of secondary mounting support portions (23) spaced apart along the first lateral edge, The boundary secondary insulation block (37) is sandwiched between two adjacent secondary mounting support portions (23) along the lateral edge. A liquefied gas storage facility according to any one of claims 1 to 3.

15. The aforementioned secondary insulating barrier (7) is A second secondary mounting support portion (23) made of metal is positioned in the corner region at the intersection of the second longitudinal edge and the first transverse edge, The second primary anchor device attached to the second secondary mounting support portion, A boundary secondary insulation block arranged along the second longitudinal edge, It is equipped with, The primary thermal insulation barrier (10) of the ceiling wall (4) is A second boundary primary insulating block arranged along the second longitudinal edge, The second corner primary insulation block, It is equipped with, The second corner primary insulation block has a main portion arranged along the first lateral edge and a protrusion extending from the main portion, perpendicular to the second secondary mounting support portion and beyond the first longitudinal edge. The aforementioned protrusion has a support region on the second boundary primary insulation block side, The second primary anchoring device includes a support element that is supported in contact with the support area of ​​the second boundary primary insulated block and the support area of ​​the second corner primary insulated block in the direction of the upper support wall (8). A liquefied gas storage facility according to any one of claims 1 to 3.

16. The aforementioned secondary insulating barrier (7) is A third and fourth metal secondary mounting support portion are positioned in the corner region at the intersection of the first longitudinal edge and the second transverse edge, and in the corner region at the intersection of the second longitudinal edge and the second transverse edge, respectively. The third primary anchor device and the fourth primary anchor device attached to the third secondary mounting support and the fourth secondary mounting support, It is equipped with, The primary thermal insulation barrier (10) of the ceiling wall (4) is A third primary boundary insulation block and a fourth primary boundary insulation block are arranged along the first and second longitudinal edges, respectively. A third corner primary insulation block and a fourth corner primary insulation block, each having a main portion arranged along the second lateral edge and a protrusion projecting from the main portion, It is equipped with, The protrusion of the third corner primary insulation block extends beyond the first longitudinal edge and has a support region on the third boundary primary insulation block side. The third primary anchor device includes a support element that is supported in contact with the support area of ​​the third boundary primary insulated block and the support area of ​​the third corner primary insulated block in the direction of the upper support wall (8), The protrusion of the fourth corner primary insulation block extends beyond the first longitudinal edge and has a support region on the fourth boundary primary insulation block side. The fourth primary anchor device includes a support element that is supported in contact with the support area of ​​the fourth boundary primary insulated block and the support area of ​​the fourth corner primary insulated block in the direction of the upper support wall (8). The liquefied gas storage apparatus according to claim 15.

17. A carrier (70) for transporting liquefied gas, equipped with a liquefied gas storage facility according to any one of claims 1 to 3.

18. A system for transporting liquefied gas, The carrier (70) described in claim 17, Insulated pipelines (73, 79, 76, 81) are arranged to connect the sealed insulated tank (71) installed in the hull of the transport vessel (70) to a floating or coastal storage facility (77), A system characterized by having the following features.

19. A method for loading or unloading cargo from a carrier (70) according to claim 17, Liquefied gas is transported via insulated pipelines (73, 79, 76, 81) from a floating or coastal storage facility (77) to the sealed insulated tank (71) of the transport vessel (70), or from the sealed insulated tank (71) of the transport vessel (70) to the floating or coastal storage facility (77). A method characterized by the following:

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