KR20200092981A - Oiltight and insulated tanks - Google Patents

Abstract

As an oil-tight and adiabatic fluid tank, the tank wall comprises one sealing membrane comprising at least one series of corrugations 9 and at least one adiabatic barrier,
The insulating barrier comprises a series of parallel grooves 7 in which wrinkles 9 are accommodated,
The insulating barrier further includes a housing 19 intersecting the groove 7,
The tank further comprises a blocking member 18 arranged in the housing 19 and having a cutout 21 configured to receive the pleats 9,
The blocking member 18 is arranged in the housing 19 such that the cutout 21 is received in the groove 7 and the pleats 9 are received in the cutout 21, so that the blocking member 18 is grooved 7 Oil-tight and adiabatic tanks to block portions of the grooves 7 arranged on the protruding side from the sealing membrane which creates a pressure drop for the circulating flow in the.

Description

Oiltight and insulated tanks

The present invention relates to membrane type oiltight and adiabatic tanks for storage and/or transportation of fluids, such as cryogenic fluids.

Membrane type oiltight and adiabatic tanks are particularly employed for the storage of liquefied natural gas (LNG) stored at -162°C at atmospheric pressure. These tanks can be installed on land or offshore structures. In the case of offshore structures, the tank may be intended to transport liquefied natural gas, or to receive liquefied natural gas that serves as fuel for propulsion of offshore structures.

In the art, oil-tight and adiabatic tanks for liquefied natural gas are known incorporating support structures, such as double hulls of ships intended to transport liquefied natural gas. These tanks are generally in the thickness direction, from the outside of the tank to the inside, the secondary insulating barrier fixed to the supporting structure, the secondary sealing membrane mounted on the secondary insulating barrier, and the primary insulating barrier mounted on the secondary sealing membrane. And a primary sealing membrane, which in turn has a primary sealing membrane intended to contact the liquefied natural gas stored in the tank and seated in the primary adiabatic barrier.

Document WO2016/046487 discloses a primary insulating barrier and a secondary insulating barrier formed of juxtaposed insulating panels. In this document WO2016/046487, the secondary sealing membrane protrudes toward the outside of the tank, so that the secondary sealing membrane can be deformed by the effects of the thermal and mechanical loads caused by the fluid stored in the tank, resulting in a plurality of wrinkles. It consists of a metal plate. The inner surface of the insulating panel of the secondary insulating barrier is characterized by a groove that accommodates the corrugation of the corrugated metal plate of the secondary sealing membrane. These folds and these grooves form a grid of channels that develop along the walls of the tank.

The idea based on the present invention is to provide a sealing membrane type oil-tight and heat-insulating tank including wrinkles with reduced convection. In particular, the idea on which the present invention is based is to provide a hermetic and adiabatic tank that limits the presence of continuous circulation channels in the adiabatic barrier to limit natural convection in the adiabatic barrier. Another idea on which the present invention is based is to provide such a tank which is tailored to allow for manufacturing and/or assembly errors of the various components of the tank.

According to one embodiment, the present invention is a fluid and adiabatic fluid tank, wherein the tank wall comprises at least one adiabatic barrier and a sealing membrane,

The sealing membrane includes a series of parallel corrugations having a longitudinal direction and a flat portion disposed between the corrugations, wherein the corrugations protrude from the planar portion on the side protruding from the sealing membrane, and the insulating barrier protrudes from the sealing membrane Is placed in,

The insulating barrier includes a series of parallel grooves in which wrinkles are accommodated,

In the groove, a width in a width direction perpendicular to the longitudinal direction of the wrinkle is greater than a width in the width direction of the wrinkle received in the groove,

The insulating barrier further includes a housing crossing the groove and having a width greater than that of the groove,

The tank further includes a blocking member arranged in the housing, the blocking member having a width greater than the width of the groove and preferably less than the width of the housing, and the blocking member has a cutout configured to accommodate wrinkles,

The blocking member is arranged in the housing such that the cutout is received in the groove and the pleats are received in the cutout, so that the blocking member creates a pressure drop against the flow circulating in the groove, thereby cutting the portion of the groove disposed on the side protruding from the sealing membrane. Provides oiltight and insulated tanks to shut off.

By these features, these tanks offer the possibility of flexibly blocking the grooves that receive the pleats of the membrane, despite errors affecting the location of the pleats in the grooves. This error can result, inter alia, from manufacturing and mounting of pleats to the groove. Moreover, with these features, the groove portion between the bottom of the groove formed by the insulating barrier and the convex side of the wrinkle can be blocked by the blocking member for different positions of the wrinkle in the groove. In particular, the groove portion can be blocked despite uncertainty regarding the location of the crease in the groove related to application and/or assembly errors. The width of the blocking member preferably enables blocking of the grooves, regardless of the location of the creases in the grooves. The width of the blocking member preferably allows for the placement of said part of the blocking member in the groove part, without requiring a change of the blocking member, in particular without altering the resistance to gas flow.

The blocking member can thus limit the formation of flow in the channels of the adiabatic barrier, in particular any channel of flow disposed closer to these channels and the hull, for example the formation of a thermal siphon between the mastic filling space between the adiabatic barrier and the supporting structure. To do. In particular, it is possible to limit the formation of these flows, for example in grooves with vertical components that can be assisted by gravity.

Embodiments of such tanks can have one or more of the following features.

According to one embodiment, the housing is developed in a plane perpendicular to the longitudinal direction of the corrugation.

According to one embodiment, the cutout of the blocking member has a shape complementary to the shape of the wrinkles. In other words, the cutout has a concave shape, and the wrinkles have a concave shape with substantially the same radius of curvature.

According to one embodiment, the membrane is a corrugated metal membrane.

According to one embodiment, the thickness of the blocking member in the longitudinal direction of the corrugation is equal to the thickness of the housing in the longitudinal direction of the corrugation.

According to one embodiment, the error between the housing and the blocking member is adapted to enable movement of the blocking member in the housing in the width direction, while preventing ambient flow between the housing and the blocking member. According to one embodiment, the error is +/- 0.1 mm.

According to one embodiment, the depth of the blocking member in the thickness direction of the tank wall is greater than or equal to the depth of the housing in the thickness direction of the tank wall.

According to one embodiment, the longitudinal direction of the pleats comprises a vertical component with respect to the ground, ie a component in the direction of gravity.

The blocking member can be made of various materials. According to one embodiment, the blocking member comprises assembly of the material. According to one embodiment, the blocking member comprises a material having a low coefficient of friction on the side facing the housing. Such low friction coefficient materials are, for example, polyethylene, polypropylene, polymethylmethacrylate (PMMA), polyvinylchloride (PVC) or synthetic plastic foams. According to one embodiment, the blocking member is made of foam of a correctly selected density, for example, foamed polystyrene having a density of 10 to 30 kg/m ³ to enable its deformation.

According to one embodiment, the insulating barrier comprises a plurality of juxtaposed insulating elements fixed to the support wall.

According to one embodiment, the plurality of insulating elements each include individual groove portions, and the insulating elements are aligned side by side so that the groove portions of the aligned insulating elements together form grooves in which wrinkles are received.

According to one embodiment, the at least one insulating element comprises a portion of a plurality of grooves that receive distinct pleats of a series of pleats. According to one embodiment, a plurality of blocking members are arranged in said at least one insulating element to block individual groove portions.

According to one embodiment, the housing is formed in an insulating element.

By these features, the blocking member can be arranged in the insulating element at the manufacturing stage, prior to installation in the tank. These tanks are thus simple and fast to manufacture.

The housing can be formed on the insulating element in various ways. According to one embodiment, the housing is manufactured by machining an insulating element. According to one embodiment, the housing is manufactured by end milling using two sizes of milling tools. According to one embodiment, it is made by rolling milling with a milling saw of a diameter fitted to three sizes.

According to one embodiment, the housing is formed in a gap between two adjacent insulating elements.

By these features, the blocking member does not require modification of the insulating element to be accommodated in the tank. Therefore, the insulating element and the tank are simple to manufacture.

According to one embodiment, the blocking member is coupled to one side of the insulating element.

According to one embodiment, the insulating peeling is arranged in the gap between two adjacent insulating elements, the insulating peeling forming the bottom of the housing.

These tanks have excellent insulating properties. Moreover, the housing for the blocking member is thus simple to manufacture.

According to one embodiment, the depth of the blocking member in the thickness direction of the tank wall is greater than that of the housing in the thickness direction of the tank wall before installation of the sealing membrane, preferably slightly larger, for example 1 to 3 mm greater. . In other words, the blocking member has a depth that, when mounted in the housing, at the surface of the insulating filling, prior to mounting the sealing membrane, causes the upper surface to extend 1 to 3 mm beyond the upper surface of the insulating element.

According to one embodiment, the insulating peeling is compressible. According to one embodiment, the insulating peeling is compressed by the blocking member when the wrinkles are seated in the cutout of the blocking member.

According to one embodiment, the blocking member preferably comprises a lower portion in contact with the bottom of the housing made of a rigid material having a low coefficient of friction to enable sliding of the blocking member in the housing.

According to one embodiment, the blocking member comprises a locally deformable portion, and wrinkles are supported on the locally deformable portion.

According to one embodiment, the lower portion of the blocking member in contact with the bottom of the housing is made of a material selected from the group of materials consisting of polypropylene, polymethylmethacrylate, polyvinylchloride, polyethylene, synthetic plastic foam or combinations thereof.

According to one embodiment, the locally deformable portion is made of a material selected from the group of materials consisting of a fibrous material, glass wool, melamine foam, flexible polyurethane foam, or a combination thereof.

By these features, the pressure drop in the channel formed by the groove can be controlled. In particular, these locally deformable parts do not tightly block the grooves, and allow passage of gas in the channel, while causing high pressure drops to prevent flow and convection phenomena. Moreover, this locally deformable portion allows the blocking member to better wrap the profile of the crease. Finally, this locally deformable part allows the local deformation to compensate for manufacturing errors of the various elements that cooperate with it.

According to one embodiment, the blocking member comprises a strip of compressible material on the top surface, ie on the side facing the sealing membrane. According to one embodiment, this strip is an attachment strip. According to one embodiment, this strip has a thickness of 1 to 2 mm. According to one embodiment, the strip is made of, for example, a fibrous material, melamine foam or other material. According to one embodiment, this material has a size substantially equal to the size of the top surface of the blocking member, so as not to create an unwanted bypass flow.

According to one embodiment, the top surface of the blocking member has a profile favorable for local deformation, such as a tooth profile perpendicular to the longitudinal direction of the corrugation.

According to one embodiment, the corrugation has a first lateral surface that is inclined with respect to the thickness direction of the tank wall, and the blocking member causes the thickness of the tank to cause the blocking member to slide at the width of the housing when the corrugation is inserted into the groove It has a second surface inclined to the direction.

By these features, the wrinkles are automatically placed in the cutout of the blocking member when inserting the wrinkles into the groove. Indeed, the cooperation between the sloping surface of the pleats and the sloping surface of the cutouts allows for a simple and rapid transition of the movement of the blocking member in the housing to accurately place the cutout to accommodate the pleats. Moreover, these features enable the movement of the blocking member without generating high stress on wrinkles that are likely to cause deformation of the wrinkles.

According to one embodiment, the width of the blocking member is equal to or greater than the width of the corrugation plus twice the difference in width between the groove and the corrugation.

The blocking member thus has a width adapted to block the groove portion between the pleats and the insulating barrier, no matter where the pleats are located in the grooves. In particular, the width of the blocking member allows blocking of this part of the groove even if the wrinkles are in the extreme lateral position in the groove due to manufacturing and/or assembly errors.

According to one embodiment, the blocking member is accommodated in the housing with a movement of one degree of freedom in the width direction.

According to one embodiment, the blocking member is accommodated in the housing so as not to prevent movement in the thickness direction of the tank wall between the sealing membrane and the insulating barrier.

According to one embodiment, the blocking member comprises a member for engaging it with a housing fitted to prevent the blocking member from moving in the thickness direction of the tank wall and to enable it to move in the width direction in the housing. According to one embodiment not shown, the coupling member consists of at least two hooks coupled to at least one insulating block. According to one embodiment, the blocking member comprises, for example, a force-received blade, which is accommodated between the insulating filling and one of the insulating elements that form the gap, so as to secure the blocking member in the thickness direction of the tank.

According to one embodiment, the cutout forms a cam surface on which the folds slide when placing the pleats in the groove.

According to one embodiment, the longitudinal direction of the pleats comprises a vertical component with respect to the ground, ie a component in the direction of gravity.

According to one embodiment, the tank includes a row of housings, the housing of a row of housings intersects individual grooves of a series of grooves, the housing having a width greater than the width of the individual grooves, the tank It further comprises a row of blocking members arranged in the individual housings, the blocking members having a width greater than the width of the grooves intersected by the individual housings and less than the width of the housings, the blocking members being configured to receive the corresponding pleats Having a cut-out, the blocking member is arranged in the housing such that the cut-out is received in the groove and wrinkles are received in the cut-out, so that the blocking member protrudes from the sealing membrane which creates a pressure drop for the flow circulating in the groove Block the part of the groove placed on the side.

According to one embodiment, the parallel pleats of a series of sealing membranes are parallel pleats of the first series of sealing membranes, the longitudinal direction of the pleats of the pleats of the first series is the first direction, and the sealing membrane is a first series A second series of wrinkles perpendicular to the second series, the longitudinal direction of the wrinkles of the second series of wrinkles forms a second direction perpendicular to the first direction, the blocking member of the row of blocking members is the wrinkles of the second series It is arranged between two neighboring folds.

According to one embodiment, the tank includes a plurality of rows of blocking members accommodated in individual housings, the rows of blocking members being arranged at regular intervals in the longitudinal direction of the corrugation. By these features, the effect is cumulative, creating a chain pressure drop in the groove that accommodates the corrugation.

By these features, a pressure drop is created in the tank wall for the entire tank wall. In particular, whatever the path of circulation of flow in the tank wall, the latter will encounter one of the blocking elements of a row of blocking elements.

According to one embodiment, the tank includes a plurality of rows of blocking members housed in individual housings. According to one embodiment, the plurality of rows of blocking members are arranged at regular intervals in the longitudinal direction of the pleats so that their effects accumulate to create a chain pressure drop in the grooves that receive the pleats. According to one embodiment, the blocking members of the two rows of blocking members are spaced apart in the longitudinal direction of the pleats at a distance of 3 m. According to one embodiment, the blocking members of the two rows of blocking members are spaced apart in the longitudinal direction of the corrugation at a distance of 1 m.

According to one embodiment, at least one blocking member is arranged on the tank wall to block the groove portion that receives the pleats of the second series of pleats.

According to one embodiment, the sealing membrane is supported by an insulating barrier, and the creases protrude towards the support wall.

According to one embodiment, the sealing membrane is a secondary sealing membrane, the insulating barrier is the primary insulating barrier, the corrugation protrudes toward the inside of the tank, and the tank is fixed to the supporting wall to support the secondary sealing membrane Further comprising an insulating barrier, the primary insulating barrier is supported by a secondary sealing membrane, the tank is further supported by a primary insulating barrier, and further comprising a primary sealing membrane intended to contact the fluid in the tank, the groove It is formed on the lower surface of the primary insulating barrier.

According to one embodiment, the sealing membrane is the primary sealing membrane, the insulating barrier is the primary insulating barrier, the corrugation protrudes toward the outside of the tank, and the tank is fixed to the supporting wall to support the secondary sealing membrane Further comprising an insulating barrier, the primary insulating barrier is supported by the secondary sealing membrane, the primary sealing membrane is supported by the primary insulating barrier and is intended to contact the fluid in the tank, the groove of the primary insulating barrier It is formed on the upper surface.

Such tanks may form part of an on-shore storage facility for storing LNG, for example, or be installed on coastal or deep sea offshore structures, particularly methane tankers, floating storage and regassification units (FSRUs), floating production storage and offloading (FPSO) units, etc. have.

According to one embodiment, the ship for the transportation of the cold liquid product comprises a double hull and the aforementioned tank disposed at the double hull.

According to one embodiment, the present invention also provides a method for loading or offloading such a ship, wherein the cold liquid product is supplied from an offshore or on-shore storage facility to a ship's tank or vice versa via an insulated pipe.

According to one embodiment, the present invention also provides a system for conveying a low temperature liquid product, which is insulated pipe and insulation arranged to connect a tank installed at the ship's hull to the aforementioned ship, sea or land storage facility. And a pump for causing the flow of a cold liquid product from a marine or land storage facility through a pipe to a ship's tank or vice versa.

With reference to the accompanying drawings, the following description of specific embodiments of the present invention, given by way of non-limiting example only, will better understand the present invention, and other objects, details, features and advantages will become more clearly apparent. .

1 is a partial perspective view of an oiltight and insulating tank wall insulating barrier.
FIG. 2 is a plan view of the insulating element of the insulating barrier of FIG. 1;
FIG. 3 shows different possible positions of wrinkles in the groove, and is a partial cross-sectional view of an insulating barrier in which a corrugated sealing membrane including wrinkles accommodated in the groove of the insulating barrier is seated.
Figure 4 includes a blocking member according to a first embodiment of the present invention, a partial perspective view of an insulating barrier on which a sealing membrane is seated.
5 is a schematic perspective view of a blocking member that can be used in the heat insulating barrier of FIG. 4;
6 is a schematic plan view of a tank wall thermal insulation barrier showing a network of grooves intended to accommodate sealing membrane pleats and a row of blocking members arranged in the thermal insulation barrier.
7 includes a blocking member according to a second embodiment, and is a schematic partial perspective view of an insulating barrier on which a sealing membrane is seated.
8 includes a blocking member according to a third embodiment, and is a schematic perspective view of an insulating barrier in which a sealing membrane is seated.
9 is a schematic perspective view of an insulating barrier in which a sealing membrane is seated, including a blocking member according to a fourth embodiment before mounting on the insulating barrier.
FIG. 10 is a view similar to FIG. 9 showing an insulating barrier after mounting a blocking member on the insulating barrier.
11 is a partial cross-sectional view of a tank wall including a blocking member according to a fifth embodiment.
12 is a cross-sectional view of the details of the tank wall of FIG. 11 in the area of the blocking member of the tank wall.
13 is a schematic cut-away view of a methane tanker tank including oil-tight and adiabatic tanks and a terminal for loading/offloading the tank.
14 is a plan view of an insulating barrier insulating panel of a bottom wall of a oiltight and insulating tank, schematically showing two rows of blocking members arranged in an insulating panel.

By convention, the terms "outside" and "inside" are used to define the position of one element relative to each other, relative to the inside and outside of the tank.

Oil-tight and adiabatic tanks for storing and transporting cryogenic fluids, such as liquefied natural gas (LNG), comprise a plurality of tank walls, each having a multi-layer structure.

These tank walls are from the outside of the tank to the inside, the secondary insulating barrier fixed to the supporting structure by the secondary fixing member, the secondary sealing membrane supported by the secondary insulating barrier, and the primary fixed to the secondary insulating barrier And a primary sealing membrane intended to contact the cryogenic fluid stored in the tank supported by the adiabatic barrier and the primary adiabatic barrier.

The support structure can be a freestanding metal plate, or more generally any type of rigid partition with suitable mechanical properties. The supporting structure can be formed in particular by the ship's hull or double hull. The support structure includes a plurality of walls defining the general shape of the tank, usually a polyhedron shape. Some walls may also include only one insulating barrier and one sealing membrane for storing LPG, for example.

In FIG. 1, a portion of an insulating barrier, such as a secondary insulating barrier, is shown, such as oiltight and insulating fluid tank walls.

This insulating barrier comprises a plurality of juxtaposed insulating panels 1 fixed to a supporting structure. The insulating panel 1 has a substantially rectangular parallelepiped shape. 2 shows this insulating panel 1 as viewed from above.

The insulating panel 1 may be made of various materials or combinations of various materials, in particular plywood, polymer foam, fiber reinforced polymer foam. In an embodiment, the insulating panel includes one or more metal plates coupled to its inner surface, so that the corrugated metal plate can be welded to the sealing membrane.

As shown in Fig. 1, each insulating panel 1 comprises an insulating lining layer 2 interposed between an inner rigid plate 3 and an outer rigid plate 4, for example an insulating polymer foam layer 2 . The inner rigid plate 3 and the outer rigid plate 4 are, for example, plywood of sheets adhered to the insulating polymer foam layer 2. The insulating polymer foam layer 2 may in particular be a polyurethane-based foam layer. The polymer foam layer 2 is advantageously reinforced by glass fibers that contribute to reducing its thermal shrinkage.

The insulating panels 1 are juxtaposed in parallel rows spaced from one another by gaps 5 which ensure functional assembly errors. The gap 5 is filled with the heat-resistant lining 6 shown in FIGS. 7 to 10. The heat-resistant lining 6 advantageously avoids the formation of free spaces in the insulating barrier, without completely prohibiting the circulation of gas in the gap 5 between the insulating panels 1, for example inert gas such as nitrogen. , Made of a porous material. The heat-resistant lining 6 is made of, for example, glass wool, rock wool or open-cell soft synthetic foam. The gap 5 has a width of about 10 to 60 mm, in particular 30 mm, for example.

1 and 2, the inner plate 3 comprises two series of mutually orthogonal grooves 7 and 8 to form a groove in a network. The grooves 7 and 8 of each series are parallel to the two opposite sides of the insulating panel 1. The grooves 7 and 8 are intended to accommodate the corrugations 9 shown in, for example, FIGS. 3 and 4 projecting outwards of the tank formed in the metal plate 10 of the sealing membrane. In the embodiment shown in FIG. 2, the inner plate 3 comprises three grooves 7 extending in the longitudinal direction of the insulating panel 1 and nine grooves 8 extending in the transverse direction of the insulating panel 1 Includes.

Moreover, the inner plate 3 has small metal plates 11 and 12 for fixing the edges of the corrugated metal plate 10 of the sealing membrane to the insulating panel 1. The small metal plates 11, 12 extend in two perpendicular directions parallel to the two opposite sides of the insulating panel 1. The small metal plates 11 and 12 are joined to the inner plate 3 by, for example, screws, rivets or staples. The small metal plates 11 and 12 are arranged in recesses formed in the inner plate 3 such that the inner surface of the small metal plates 11 and 12 is parallel to the outer surface of the inner plate 3. The inner plate 3 has a substantially flat inner surface outside a singular zone such as a recess or groove 7, 8 for receiving small metal plates 11, 12. Metal plates 11 and 12 as shown are illustrative examples. These metal plates can be arranged in different numbers, relative sizes and positions than shown.

The inner plate 3 is projected toward the inner side of the tank and can equally have a stud 13 intended to join the primary insulating barrier to the insulating panel 1. The stud 13 passes through the orifices formed in the small metal plates 11 and 12.

The sealing membrane comprises a plurality of corrugated metal plates 10 each having a substantially rectangular shape. Each corrugated metal plate 10 includes a first series of parallel corrugations 9 extending in a first direction and a second series of parallel corrugations 9 extending in a second direction. The direction of the corrugations 9 of the two series of each corrugated metal plate 10 is at right angles. These folds 9 project outwards of the tank, ie in the direction of the support structure. The corrugated metal plate 10 includes a plurality of flat surfaces between the corrugations 9. The corrugation 9 of the corrugated metal plate 10 is accommodated in the grooves 7 and 8 formed in the inner plate 3 of the insulating panel 1. Alternatively, in a manner not shown, the pleats 9 can also be accommodated in the gaps between the insulating blocks.

The corrugated metal plate 10 is, for example, Invar®, an alloy of nickel and iron with an expansion coefficient of typically 1.10 ^-6 to 2.10 ^-6 K ^-1 or a high content of manga with an expansion coefficient of typically about 7.10 ^-6 K ^-1 It consists of an alloy of iron with a need. Alternatively, the corrugated metal plate 10 can be made equally of stainless steel or aluminum.

During the manufacture of the tank, the grooves 7 and 8 are formed to a size constituting a zone of adjustment of the arrangement of the corrugations 9 in the tank. In particular, these grooves 7 and 8 should be formed in a size that enables variations in the size of the wrinkles 9 related to the manufacturing error of the wrinkles 9 in the corrugated metal plate 10. Moreover, this size formation must take into account the errors regarding the placement of the insulating panel 1 and the corrugated metal plate 10 relative to each other.

3 shows the extreme positions 34 and the central position 35 defining the range of positions of the pleats 9 received in the grooves 7 and 8. The grooves 7 and 8 are preferably perpendicular to the longitudinal direction 15 of the corrugation 9 and the width 14 in the direction parallel to the inner surface 16 of the inner plate 3 is corrugated 9 in this direction. Is formed to be larger than or equal to the width of 17 plus a predetermined error value corresponding to twice the error for placing the pleats 9 in the grooves 7 on both sides of the central position 35 do.

Because of these sizes, space is maintained in the grooves 7 and 8 between the insulating barrier and the sealing membrane. These grooves 7 and 8 thus constitute a circulating channel of a network. These channels, which are continuously deployed between the sealing membrane and the insulating barrier across the tank wall, are particularly advantageous for convection motion over a tank wall having a large vertical component, such as a transverse tank wall. The continuous channel of one such network creates a thermosiphon phenomenon favorable to heat transfer by gas convection in the adiabatic barrier.

One aspect of the invention comes from the idea of preventing these convection motions in the walls of the tank. To this end, one aspect of the invention comes from the idea of limiting the length of the channels formed by the grooves 7 and 8 of the insulating barrier.

According to the first embodiment, the blocking member 18 is inserted into one, part or all of the grooves 7 and 8 of the insulating barrier. These blocking members 18 are arranged in the grooves 7 and 8 in order to be arranged between the sealing membrane and the insulating barrier.

4 is an area of the groove 7 in which the pleats 9 of the sealing membrane are received, schematically showing a part of the insulating panel including the blocking member 18 according to the first embodiment.

The insulating panel 1 includes a housing 19 in which the blocking member 18 is accommodated in one degree of freedom. The housing 19 is developed at a right angle to the longitudinal direction 15 of the pleats 9. The width 20 of the housing 19 in the width direction of the groove 7 is larger than the width 14 of the groove 7. In the embodiment shown in Fig. 4, the groove 7 has a lateral wall that is inclined substantially parallel to the corrugation 9. The width 20 of the housing 19 is greater than the width in the region of the maximum width 14 of the groove 7, ie the intersection between the inner surface 16 of the inner plate 3 and the groove 7. This housing 19 traverses the groove 7. In other words, the housing 19 includes a central portion common to the groove 7 and two lateral portions, each open to the groove 7 at each side of the corrugation 9.

In the insulating panel 1, such a housing 19 can be manufactured in various ways, such as machining, milling, and the like.

Here, the blocking member 18 has a flat general shape. The central portion of the blocking member 18 includes a cutout 21. The cut-out 21 has a shape complementary to the convex surface of the wrinkle 9. The cutout 21 has a more specifically concave shape, and the radius of curvature is preferably the same as the radius of curvature of the pleats 9. The inner surface of the blocking member thus wraps the shape of the sealing membrane in the groove 7.

The blocking member 18 has a thickness in the longitudinal direction 15 of the corrugation 9 substantially equivalent to that of the housing 19, but does not grip, so that the blocking member 18 can easily move in the housing 19 Does not. The blocking member 18 has a thickness of, for example, 5 mm to 30 mm, preferably 10 mm to 12 mm. Moreover, the blocking member 18 has a depth in the thickness direction of the tank wall substantially corresponding to the depth in the direction of the housing 19. In other words, with the exception of the cutout 21, the blocking member extends over the entire depth of the groove 7 in the thickness direction of the tank wall.

The fitting between the blocking member 18 in the longitudinal direction 15 of the pleats 9 and the housing 19 allows the blocking member of the housing 19 in the width direction of the housing 19 without allowing adverse ambient flow It is sufficient to allow the movement of (18). This adjustment is preferably adapted to limit or even block the movement of the blocking member 18 at its own weight. The error is, for example, about +/- 0.1 mm.

The blocking member 18 may be made of one material or a combination of different materials.

In one embodiment, the blocking member 18 is made of a single material. This material is selected to allow sliding movement of the blocking member 18 in the housing 19. Such materials are plastic materials such as plastic foam, polyvinylchloride (PVC), polymethylmethacrylate (PMMA), polyethylene (PE), polypropylene (PP) or foamed or non-foamed polystyrene (PS).

In one embodiment, the blocking member 18 is made of a combination of materials based on a plastic material covered with a layer of porous material, for example, the side that cooperates with the sealing membrane. Such porous materials are, for example, glass wool, melamine foam or felt. This porous material layer allows the blocking member 18 to allow the inert gas to circulate, while creating a pressure drop in the flow.

The blocking member may be covered with a material having a low coefficient of friction with respect to the material forming the housing 19 in various faces facing the wall of the housing 19. Such coatings can thus be made of plastic materials such as plastic foam, polyvinylchloride (PVC), polymethylmethacrylate (PMMA), polyethylene (PE), polypropylene (PP) or foamed or non-foamed polystyrene (PS). have.

The blocking member 18 can be equally made of a material that allows for local deformation of the surface in contact with the sealing membrane and/or housing 19 when the mechanical strength and structure are in place. This locally deformable blocking member 18 enables compensation of manufacturing errors of the housing 19 and/or the sealing membrane. For example, the blocking member 18 can be made of expanded polystyrene having a density of 10 to 30 kg/m ³ .

The width 22 of the blocking member 18 in the width direction of the housing 19 is the width 20 of the housing 19 to the width 14 of the groove 7. The width 22 of the blocking member 18 is preferably the width 14 of the groove 7 and the wrinkles 9 in the grooves 7 on each side of the central position of the wrinkles 9 in the grooves 7 Greater than or equal to twice the error for placing. Moreover, the width 20 of the housing 19 is greater than or equal to twice the width 22 of the blocking member 18, i.e. the above error for placing the pleats 9 in the groove 7.

The blocking member 18 can thus be accommodated in the housing 19 at different positions along the width direction 20 of the housing 19. Moreover, whatever the position of the blocking member 18 in the housing 19, the blocking member 18 extends over the entire width 14 of the groove 7.

These different positions of the blocking member 18 allow the cutout 21 to be placed in the groove 7 no matter what the position of the pleats 9 in the groove 7 is.

In the embodiment shown in Fig. 4, the cut-out 21 is located centrally in the width direction of the blocking member 18, and the housing 19 is centered in the groove 7 in the width direction of the groove 7. In other words, the housing 19 is symmetrical with respect to the groove 7 and the blocking member is symmetrical with respect to the cutout 21. However, the position of the cut-out 21 in the width direction 22 of the blocking member 18 and/or the position of the housing 19 in the width direction 14 of the groove 7 may be different from that shown in FIG. 4. On the other hand, it is possible to arrange the cut-out 21 in a groove 7 to suit all possible positions of the pleats 9. Thus, in the example not shown, the cutout can be arranged asymmetrically with respect to the blocking member 18, and the housing is thereby provided with cutout 21 so that all possible movements of the groove 7 in the width direction of the groove 7 are possible. In order to be able to take the position, it has an asymmetrical lateral part with respect to the groove 7.

The blocking member 18 is preferably received in the housing 19 at the manufacturing stage, ie prior to installing the insulating panel 1 with the housing 19 in the support structure.

During the installation of the sealing membrane in the tank, the corrugated metal plate 10 is arranged to receive the corrugation 9 in the groove 7. The complementary shape of the cutout 21 and crease 9 allows the cutout to perform the cam surface function while inserting the crease 9 into the groove 7. The pleats 9 thus have at least one (two in the illustrated embodiment) outer surfaces which are inclined with respect to the inner surface 16 of the inner plate 3 of the insulating panel 1. Likewise, the cutout 21 has at least one (two in the illustrated embodiment) an inner surface inclined with respect to the inner surface 16. Therefore, when the wrinkle 9 is inserted into the groove 7, the outer surface of the wrinkle 9 is supported on the inner surface of the cutout 21. The cooperation of the outer surface of the pleats 9 and the inner surface of the cutouts 21 during insertion of the pleats 9 into the grooves 7 thus makes it possible for the blocking member 18 in the housing 19 in the width direction of the housing 19 Can give movement. The insertion of the pleats 9 into the groove 7 thus enables the automatic placement of the blocking elements 18 so that the pleats 9 are received in the cutout 21 of the blocking element 18.

Moreover, the complementary shape of the cut-out 21 and pleats 9 allows the blocking member 18 to wrap the shape of the oiltight membrane in the groove 7. The blocking member 18 thus develops throughout the portion of the groove 7 between the sealing membrane and the bottom of the groove 7 in the area of the housing 19. In other words, the blocking member 18 blocks this part of the groove 7 in the area of the housing 19. Such blocking needs to be completely tight. However, such blocking should generate a pressure drop sufficient to prevent the flow that may occur in the groove 7 by convection in the form of a thermosiphon.

5 shows a modified embodiment of the blocking member 18 according to the first embodiment shown in FIG. 4. In this variation, the profile of the blocking member 18 intended to contact the sealing membrane is characterized by a plurality of ribs 23. In the embodiment shown in FIG. 5, these ribs 23 are developed on the inner surface of the blocking member 18 in the width direction 22 of the blocking member 18. These ribs 23 are advantageous for the local deformation of the blocking member 18, allowing better cooperation between the sealing membrane and the inner surface of the blocking member 18.

According to another change not shown, a compressive material of 1 to 2 mm thick strip is added to the inner surface of the blocking member 18. Similar to the rib 23, this strip allows the blocking member 18 to best wrap the corrugation 9 and the profile of the sealing membrane cooperating therewith. The strip preferably has a size substantially the same as that of the inner surface of the blocking member 18, so as not to create unwanted bypass flow.

6 schematically shows an insulating barrier portion of a tank wall, such as a secondary insulating barrier portion, and shows an example of the arrangement of a plurality of blocking members 18 in the insulating barrier.

The blocking member 18 is arranged at regular intervals in a plurality of insulating panels 1, in which the grooves 7 and 8 can form a flow channel in the tank wall. Here, the blocking member 18 is more specifically disposed in all grooves 7 across two specific neighboring grooves 32 of the grooves 8 of the series, wherein the blocking member 18 is the neighboring groove 32 ) Between the grooves (7). In other words, the blocking member 18 is disposed in the insulating barrier in all the grooves 7 connecting the two specific neighboring grooves 32.

This row of blocking members 18 thus leaves the flow with the possibility of bypassing the blocking members 18 by temporarily taking one of the right-angled grooves 8.

In the embodiment shown in Fig. 6, a row of blocking members 18 are thus arranged in a plane, parallel to a set of parallel grooves 7 intersecting the plane.

This blocking member 18 is preferably used for all grooves 7 and 8 having vertical components relative to the ground, such as the chamber's chamber walls, copper dams or side walls. Likewise, this blocking member 18 is advantageously arranged in the insulating barrier of the bottom wall of the tank, in all grooves 7, 8.

These blocking members 18 are preferably arranged at regular intervals 33 along the grooves 7 and 8 so that their effects accumulate and create a chain pressure drop in the preferred flow direction. For example, in the case of pleats 9 with vertical components, these blocking members 18 can be arranged along the pleats every 3 m or every 1 m. In the case of the corrugation 9 of the horizontal floor wall, the blocking member 18 is arranged, for example, every 1 m.

From the point of view of the insulating panel 1 having a vertical component relative to the ground, the blocking member 18 is preferably disposed close to the lower region in the region of the grooves 7 and 8 having the vertical component. The distance of the blocking member 18 from the heat-resistant lining 6 accommodated between the two insulating panels 1 is therefore insufficient for the flow toward the bottom of the tank to be formed between the blocking member 18 and the heat-resistant lining 6 Thus, the pressure that can be applied to the heat-resistant lining 6 is limited.

14 shows an example of the arrangement of the blocking members 18, from the perspective of the insulating panel 1 incorporated into the oiltight and insulating tank bottom wall. In this example, the blocking member 18 is arranged in all the grooves 7 and 8 formed by the insulating panel 1. These blocking members 18 are parallel along two adjacent edges of the insulating panel 1 and form two right-angle rows of blocking members 18 having a substantially "L" shape in the insulating panel 1. If the insulating panel 1 as shown in FIG. 14 is juxtaposed on the bottom of the tank, the blocking members of the plurality of rows of the juxtaposed insulating panel 1 are thus attached to the grooves 7 and 8 of the various insulating panels 1. It is arranged to form one grid of blocking members in all channels formed by it.

The maximum spacing between the two rows of blocking members 18 is selected such that the pressure drop created with a particular velocity and a thoughtable error is greater than the hydrostatic load of the flow to be constrained. This pressure drop coefficient can be easily determined numerically or by tests to establish flow in the blocking member mock-up, change the flow rate, and measure the pressure difference between upstream and downstream. The load can be calculated by taking into account the integral of the change in density (ρ) of a given fluid in the direction fixed by the gravity of the circulation loop and multiplying the universal gravitational constant. Thus, in the first approximation, in the two vertical channels of the height H (of the individual temperatures Tf and Tc) communicating at the ends thereof, there is a pressure difference dP satisfying the below equation with the first approximation.

dP=(ρ(Tf)-ρ(Tc))*g*H

7 shows a second embodiment. Elements performing the same or the same functions as those described above with reference to FIGS. 1 to 6 have the same reference numbers.

This second embodiment differs from the first embodiment in that the housing 19 is formed in the gap 5 between two neighboring insulating panels 1, not the insulating panel 1. This embodiment has the advantage of not requiring the machining of the insulating panel 1 to form the housing 19. The bottom of the housing 19 on which the blocking member 18 is seated is formed, for example, by an insulating lining 6 accommodated in the gap 5.

In this embodiment, the corrugated metal plate 10 is placed in the insulating panel 1 prior to the installation of the blocking member 18 to locate the corrugation 9 in the corresponding grooves 7 and 8. When the pleats 9 are positioned in the grooves 7 and 8, the blocking member 18 is engaged in a suitable position on the corresponding side of the insulating panel 1. The blocking member 18 is, for example, stapled, screwed or glued to the flank of the insulating panel 1. In this embodiment, the blocking member 18 has a thickness in the longitudinal direction 15 of the crease 9 smaller than the gap 5.

8 shows a third embodiment. Elements performing the same or the same functions as those described above with reference to FIGS. 1 to 6 have the same reference numbers.

Similar to the second embodiment, this third embodiment differs from the first embodiment in that the housing 19 is formed in the gap 5 between the two insulating panels 1. However, in this embodiment, the heat resistant lining 6 includes a depression 24 that forms the bottom of the housing 19. The depression 24 has a width characteristic similar to that described above with respect to the width 20 of the housing 19 according to the first embodiment. Thus, in this third embodiment, the blocking member 18 is arranged in the heat resistant lining 6 in the depression 24 without being engaged with the flank of the insulating panel 1. The blocking member 18 may be disposed prior to placing the corrugated plate 10 on the insulating barrier.

Similar to the first embodiment, when the wrinkles 9 are inserted into the grooves 7 and 8, the cooperation between the inner surface of the cutout 21 and the outer surface of the wrinkles 9 is in the width direction of the blocking member 18 (22) enables the sliding of the blocking member (18) in the depression (24).

The blocking member 18 advantageously has a thickness 15 in the longitudinal direction of the corrugation 9 of substantially equal to that of the gap 5, typically about 30 mm or 40 mm.

In an embodiment not shown, the heat resistant lining 6 does not have a recess 24, and the blocking member 18 is seated on the inner surface of the heat resistant lining 6. In this embodiment, when the blocking member 18 is placed in the gap 5 in the region of the groove 7, it is beyond the inner surface of the insulating panel 1 forming the gap 5, for example, 1 to 3 mm Is extruded. When the corrugated metal plate 10 is arranged to insert the pleats 9 into the groove 7, the pleats 9 pressing against the blocking member 18, as described above, the blocking member against the groove 7 ( 18) is automatically placed. Moreover, the wrinkles 9 pressing against the blocking member 18 are heat-resistant linings arranged under the blocking member 18 such that the blocking member 18 is parallel to the inner surface of the insulating panel 1 forming the gap 5. (6) is compressed.

9 and 10 show a fourth embodiment of the present invention. Elements performing the same or the same functions as those described above with reference to FIGS. 1 to 6 have the same reference numbers.

This fourth embodiment differs from the third embodiment in that the blocking member further comprises a blade 25 protruding from the inner surface of the blocking member 18. These blades 25 are arranged to extend the side of the blocking wall 18 in the direction of the support wall.

When placing the blocking member 18, the blade 25 is inserted between the heat-resistant lining 6 and one of the insulating panels 1 forming a gap 5 in which the heat-resistant lining 6 is received. The insertion of the blade 25 between the heat-resistant lining 6 and the insulating panel 1 allows the blocking member 18 to be pressed against the flank of the insulating panel 1, while the blocking member 18 is in place. To fix. The blade 25 advantageously has a slight taper to facilitate insertion on the one hand and to contribute to the optimal placement of the profile of the blocking member 18 on the surface of the sealing membrane on the other hand. This taper makes it possible to ensure that the position of the blocking member 18 is maintained over the life of the tank.

In an embodiment not shown, at least two hooks coupled to the at least one insulating block to allow the lateral movement of the blocking member 18 while blocking the movement in the thickness direction of the insulating block or blocks. It consists of.

11 and 12 show a fifth embodiment of the present invention suitable for a tank comprising a secondary insulating barrier and a primary insulating barrier. Elements performing the same or the same functions as those described above with reference to FIGS. 1 to 6 have the same reference numbers.

As shown in Fig. 11, the tank wall according to the fifth embodiment includes a secondary sealing membrane in which a corrugation 9, which is seated on the secondary insulating barrier, protrudes in the direction of the inside of the tank. The primary insulating barrier comprises a plurality of primary insulating panels 26 substantially in the shape of a cuboid. The primary insulating panel 26 is of any kind of structure, such as an outer rigid plate 29, such as an insulating polymer foam 27 of one layer 27 interposed between a single plywood and an inner rigid plate 28. It includes a laminated structure composed of a single layer of insulating lining. The primary sealing membrane is obtained by assembling a plurality of corrugated metal plates 30.

Thus, grooves 7 and 8 for accommodating the pleats 9 are provided in the primary insulating panel 26. These grooves 7 and 8 are provided on the outer rigid plate 29 of the primary insulating panel 26 and, if possible, on the insulating lining of the primary insulating panel 26.

This fifth embodiment is thus different from the first embodiment in that the housing 19 is provided on the primary insulating panel 26 for receiving the blocking member 18. These housings 19 and blocking members 18 furthermore are of size and position in a tank similar to that of the housings 19 and blocking members 18 described above with reference to FIGS. 1 to 6 for the first embodiment. It has characteristics. 12 is a detailed view of the cross section of the tank wall shown in FIG. 11 of the area of the blocking member 18 in the housing 19, crossing the groove 7 receiving the corrugation 9, by means of the housing 19 The intersecting grooves 7 are shown in FIG. 12 by dashed lines.

Particularly with regard to the secondary and primary insulating barriers, members for fixing the insulating barriers and sealing membranes, other details and other examples may refer to documents WO2016/046487, documents WO2013004943 or documents WO2014057221.

The techniques described above for producing oiltight and insulated tanks are of different types, for example to construct LNG or LPG reservoirs in offshore structures such as methane tankers or multiple sealing membranes or other ships including one sealing membrane or offshore installations. Can be used in storage tanks.

Referring to FIG. 13, the cut-away view of the methane tanker 70 shows the oil-tight and insulated tank 71 of the general shape of a prismatic column mounted on the double hull 72 of the ship. The wall of the tank 71 is a primary hermetic barrier intended to contact LNG stored in the tank, a secondary hermetic barrier arranged between the primary hermetic barrier and the double hull 72 of the ship, and the primary hermetic barrier and secondary hermetic barrier. And two insulating barriers, each arranged between the barriers and between the secondary oiltight barrier and the double hull 72.

In a manner known per se, the loading/offloading pipe 73 disposed on the upper deck of the ship may be connected by an appropriate connector to the marine or port terminal for transporting LNG cargo from or to the tank 71. Can be.

13 shows an example of a port terminal comprising a loading and offloading station 75, an underwater pipe 76 and an onshore installation 77. The loading and offloading station 75 is a stationary offshore installation comprising a movable arm 74 and a tower 78 supporting the movable arm 74. The movable arm 74 has a bundle of insulated flexible tubes 79 that can be connected to the loading/offloading pipe 73. The directional movable arm 74 fits all methane tanker loading gauges. The connection pipe, not shown, extends inside the tower 78. The loading and offloading station 75 enables loading and offloading of the methane tanker 70 from or to the land plant 77. The latter includes a connecting pipe 81 connected to a loading or offloading station 75 via a liquefied gas tank 80 and an underwater pipe 76. The underwater pipe 76 allows the transport of liquefied gas between the landing facility and the loading or offloading station 75 over a long distance, for example 5 km, where the methane tanker 70 is offshore during loading and offloading operations. It can be maintained at a distance from.

To generate the pressure required to transport the liquefied gas, a pump provided in the ship 70 and/or a pump provided in the land facility 77 and/or a pump provided in the loading and offloading station 75 are used. do.

Although the present invention has been described in connection with a plurality of specific embodiments, it is not limited to these, and falls within the scope of the invention as defined by the claims, and includes all technical equivalents and combinations of the described means.

In particular, depending on whether the wrinkles protrude in the direction of the outside of the tank or the inside of the tank, the wrinkles of the secondary sealing membrane accommodated in the groove formed on the inner surface of the secondary insulating panel or the outer surface of the primary insulating panel From the perspective, the housing and blocking member have been described in various embodiments. However, these grooves, the housing and the blocking member may be provided and installed equally in the area of the inner surface of the primary insulating panel from the viewpoint of the primary sealing membrane having corrugations projecting toward the outside of the tank. Likewise, these grooves, housings and blocking members can be provided and installed equally in the area of the inner surface of the insulating panel from the viewpoint of the tank including one sealing membrane and one insulating barrier having corrugations projecting outward of the tank. have.

Likewise, the above description was mainly provided in terms of the grooves 7 accommodating the parallel corrugations 9 in the first direction. However, this description similarly applies to the housing 19 and the blocking member 18 that enable the blocking of the groove 8 to receive the corrugation 9 in the second direction perpendicular to the first direction. This blocking member 18 can thus be arranged to block the groove 7 and/or the groove 8.

The use of the verb “comprises” or “consists of” and its conjugations thus does not exclude the existence of elements or steps other than those stated in the claims. The use of the definite articles "one" or "one" for an element or step does not exclude the existence of a plurality of such elements or steps unless otherwise stated.

In the claims, reference signs in parentheses shall not be construed as limitations of the claims.

Claims (21)

A fluid and adiabatic fluid tank, the tank wall comprising at least one adiabatic barrier and a sealing membrane,
The sealing membrane comprises a series of parallel pleats 9 having a longitudinal direction 15 and a flat portion disposed between the pleats 9, the pleats 9 protruding from the flat portion on the side protruding from the sealing membrane The insulating barrier is disposed on the side protruding from the sealing membrane,
The insulating barrier comprises a series of parallel grooves (7, 8) in which wrinkles (9) are accommodated,
In the grooves 7 and 8, the width 14 in the width direction perpendicular to the longitudinal direction 15 of the wrinkle 9 is the width 17 in the width direction of the wrinkle 9 received in the grooves 7 and 8 )
The insulating barrier further includes a housing 19, the width direction axis of the housing 19 in the width direction of the grooves 7 and 8 intersects the grooves 7 and 8, and the housing 19 is a groove ( 7, 8) has a width (20) greater than the width,
The tank further includes a blocking member 18 arranged in the housing 19, the blocking member has a width 22 greater than the width 14 of the grooves 7 and 8, and the blocking member 18 is corrugated ( 9) has a cutout 21 configured to accommodate,
The blocking member 18 is arranged in the housing 19 such that the cutout 21 is received in the grooves 7 and 8 and the wrinkles 9 are received in the cutout 21, so that the blocking member 18 is grooved ( Oil tight and adiabatic tanks that block portions of the grooves 7 and 8 arranged on the side protruding from the sealing membrane by creating a pressure drop for the circulating flow at 7, 8). According to claim 1,
The insulating barrier comprises a plurality of juxtaposed insulating elements (1, 26) fixed to a supporting wall. According to claim 2,
The housing 19 is a hermetic and insulating tank formed on the insulating elements 1, 26. According to claim 2,
The housing 19 is a hermetic and insulated tank formed in a gap 5 between two neighboring insulating elements 1, 26. According to claim 4,
An insulating and filling tank 6 is arranged in the gap 5 between two neighboring insulating elements 1 and 26, the insulating filling 6 forming the bottom of the housing 19. The method according to any one of claims 1 to 5,
The blocking member 18 includes a locally deformable portion 23 and a lower portion in contact with the bottom of the housing 19 made of a rigid material, and the pleats 9 are oiltight supported by the locally deformable portion 23 And insulating tanks. The method of claim 6,
The lower part of the blocking member 18 in contact with the bottom of the housing is a hermetic and insulated tank made of a material selected from the group of materials consisting of polypropylene, polymethylmethacrylate, polyvinylchloride, polyethylene, synthetic plastic foam or combinations thereof. The method of claim 6 or 7,
The locally deformable portion of the blocking member 18 is a hermetic and insulated tank comprising a strip of compressible material on the top surface of the blocking member 18. The method according to any one of claims 6 to 8,
The locally deformable portion 23 is a oil-tight and insulating tank composed of a material selected from a material group consisting of a fiber material, glass wool, melamine foam, soft polyurethane foam, or a combination thereof. The method according to any one of claims 1 to 9,
The corrugation 9 has a first lateral surface inclined with respect to the thickness direction of the tank wall,
The blocking member 18 is relative to the thickness direction of the tank to cause the blocking member 18 to slide at the width 20 of the housing 19 when the pleats 9 are inserted into the grooves 7, 8. Oiltight and insulated tanks with inclined second surfaces. The method according to any one of claims 1 to 10,
The width 22 of the blocking member 18 is greater than or equal to the width 17 of the corrugation 9 plus twice the difference in width between the grooves 7 and 8 and the corrugation 9 Tank. The method according to any one of claims 1 to 11,
The longitudinal direction 15 of the corrugation 9 is a hermetic and insulated tank containing vertical components relative to the ground. The method according to any one of claims 1 to 12,
It includes a row of housings 19, the housing 19 of a row of housings 19 intersects individual grooves 7, 8 of a series of grooves 7, 8, and the housing 19 Has a width 20 greater than the width 14 of the individual grooves 7 and 8,
The tank further comprises a row of blocking members 18 arranged in the individual housings 19, the blocking members 18 being the width 14 of the grooves 7 and 8 intersected by the individual housings 19. ) Has a width 22 greater than and less than the width 20 of the housing 19, the blocking member 18 has a cutout 21 configured to receive the corrugation 9, and the blocking member 18 The cut-out 21 is arranged in the housing 19 so that the grooves 7 and 8 are accommodated and wrinkles 9 are received in the cut-out 21, so that the blocking member 18 is the groove 7 , 8) Oiltight and insulated tanks to block portions of the grooves (7, 8) disposed on the protruding side from the sealing membrane which generate a pressure drop for the circulating flow. The method of claim 13,
The parallel pleats 9 of one series of sealing membranes are parallel pleats of the first series of sealing membranes, and the longitudinal direction of the pleats 9 of the pleats of the first series is the first direction,
The sealing membrane further includes a second series of corrugations 9 perpendicular to the first series, and a longitudinal direction of the corrugations of the second series of corrugations forms a second direction perpendicular to the first direction,
The blocking member 18 of a row of blocking members 18 is a oiltight and insulating tank arranged between two neighboring wrinkles 32 of the second series of wrinkles 9. The method of claim 13 or 14,
The tank includes a plurality of rows of blocking members 18 accommodated in individual housings 19, and the blocking members 18 of the rows are accumulated in their effects to grooves 7 and 8 accommodating the corrugations 9 Oil-tight and adiabatic tanks arranged at regular intervals 33 in the longitudinal direction 15 of the corrugations 9 to create a chain pressure drop. The method according to any one of claims 1 to 15,
The sealing membrane is provided by an insulating barrier, and the folds 9 are oiltight and insulating tanks projecting toward the support wall. The method according to any one of claims 1 to 15,
The sealing membrane is a secondary sealing membrane, the insulating barrier is a primary insulating barrier, the corrugation 9 protrudes toward the inside of the tank,
The tank further includes a secondary insulating barrier fixed to the support wall to support the secondary sealing membrane, the primary insulating barrier being supported by the secondary sealing membrane,
The tank further comprises a primary sealing membrane supported by the primary adiabatic barrier and intended to contact the fluid in the tank, wherein the grooves 7 and 8 are oiltight and adiabatic tanks formed on the lower surface of the primary adiabatic barrier. The method according to any one of claims 1 to 15,
The sealing membrane is a primary sealing membrane, the insulating barrier is a primary insulating barrier, and the corrugation 9 protrudes toward the outside of the tank,
The tank further includes a secondary insulating barrier that is fixed to the support wall to support the secondary sealing membrane, the primary insulating barrier is supported by the secondary sealing membrane, and the primary sealing membrane is supported by the primary insulating barrier. It is intended to come into contact with the fluid in the tank, and the grooves (7, 8) are oiltight and insulating tanks formed on the upper surface of the primary insulating barrier. As a ship 70 for the transport of low temperature liquid products,
Double hull (72) and
A ship comprising a tank (71) according to any of claims 1 to 18 arranged in a double hull. A system for transferring low temperature liquid products,
A ship (70) according to claim 19,
Insulation pipes 73, 79, 76, 81 arranged to connect the tank 71 installed at the ship's hull to the offshore or onshore storage facility 77, and
A system comprising a pump for causing the flow of a cold liquid product from an offshore or on-shore storage facility to a ship's tank via an insulated pipe or vice versa. A method for loading or offloading a ship (70) according to claim 19,
A method in which a cold liquid product is supplied from an offshore or on-shore storage facility (77) to a tank (71) of a ship via an insulating pipe (73, 79, 76, 81) and vice versa.

Images