FR2984992A1 - Waterproof and insulated tank with restraint device - Google Patents

Waterproof and insulated tank with restraint device Download PDF

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Publication number
FR2984992A1
FR2984992A1 FR1162214A FR1162214A FR2984992A1 FR 2984992 A1 FR2984992 A1 FR 2984992A1 FR 1162214 A FR1162214 A FR 1162214A FR 1162214 A FR1162214 A FR 1162214A FR 2984992 A1 FR2984992 A1 FR 2984992A1
Authority
FR
France
Prior art keywords
insulating
spacer
vessel
retaining
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR1162214A
Other languages
French (fr)
Other versions
FR2984992B1 (en
Inventor
Mohamed Sassi
Sebastien Delanoe
Olivier Perrot
Denis Bernard
Gery Canler
Julien Ollivier
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Gaztransport et Technigaz SARL
Original Assignee
Gaztransport et Technigaz SARL
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Filing date
Publication date
Application filed by Gaztransport et Technigaz SARL filed Critical Gaztransport et Technigaz SARL
Priority to FR1162214A priority Critical patent/FR2984992B1/en
Publication of FR2984992A1 publication Critical patent/FR2984992A1/en
Application granted granted Critical
Publication of FR2984992B1 publication Critical patent/FR2984992B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/004Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01Shape
    • F17C2201/0147Shape complex
    • F17C2201/0157Polygonal
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05Size
    • F17C2201/052Size large (>1000 m3)
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00Vessel construction, in particular walls or details thereof
    • F17C2203/03Thermal insulations
    • F17C2203/0304Thermal insulations by solid means
    • F17C2203/0358Thermal insulations by solid means in form of panels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00Vessel construction, in particular walls or details thereof
    • F17C2203/06Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602Wall structures; Special features thereof
    • F17C2203/0612Wall structures
    • F17C2203/0626Multiple walls
    • F17C2203/0631Three or more walls
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00Vessel construction, in particular methods of manufacturing
    • F17C2209/22Assembling processes
    • F17C2209/228Assembling processes by screws, bolts or rivets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00Handled fluid, in particular type of fluid
    • F17C2221/03Mixtures
    • F17C2221/032Hydrocarbons
    • F17C2221/033Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146Two-phase
    • F17C2223/0153Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033Small pressure, e.g. for liquefied gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00Purposes of gas storage and gas handling
    • F17C2260/01Improving mechanical properties or manufacturing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00Applications
    • F17C2270/01Applications for fluid transport or storage
    • F17C2270/0102Applications for fluid transport or storage on or in the water
    • F17C2270/0105Ships
    • F17C2270/0107Wall panels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00Applications
    • F17C2270/01Applications for fluid transport or storage
    • F17C2270/0102Applications for fluid transport or storage on or in the water
    • F17C2270/011Barges
    • F17C2270/0113Barges floating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00Applications
    • F17C2270/01Applications for fluid transport or storage
    • F17C2270/0102Applications for fluid transport or storage on or in the water
    • F17C2270/0118Offshore
    • F17C2270/0121Platforms

Abstract

Sealed and thermally insulating vessel in a supporting structure for containing a fluid, a wall of the vessel comprising a waterproof membrane and an insulating barrier between the waterproof membrane and the supporting structure, the insulating barrier comprising juxtaposed parallelepiped insulating elements and retaining devices between two insulating elements to hold them against the supporting structure, the retaining device comprising: a spacer member (28) attached to the supporting structure, a support member (11) held at a fixed distance from the supporting structure, an elongated retaining member (14) arranged in a longitudinal direction of the insulating elements and guided in translation relative to the spacer member to be able to approach the wall, an elastic element (21) resting between the body of the support and the holding member, and constrained in compression so as to support the holding member along its length along a bearing surface of the two insulating elements.

Description

The invention relates to the field of the manufacture of sealed and thermally insulated tanks. In particular, the present invention relates to a vessel for containing cold or hot liquids, and more particularly to tanks for the storage and / or transport of liquefied gas (LNG) by sea.

Sealed and thermally insulating tanks are known arranged in the hull of a ship for the transport of a liquefied gas. FR2798902 describes such a tank. This comprises two successive sealing barriers, one primary in contact with the product contained in the tank, and the other secondary disposed between the primary barrier and the carrier structure, these two sealing barriers being alternated with two so-called primary and secondary thermally insulating barriers, each thermally insulating barrier consisting of a plurality of generally parallelepiped shaped boxes, each box comprising a bottom panel and a plywood top panel. Fixing members hold the sealing barriers and the boxes against the supporting structure. According to one embodiment, the invention provides a sealed and thermally insulating tank arranged in a supporting structure for containing a fluid, in which a wall of the tank comprises a waterproof membrane and an insulating barrier arranged between the waterproof membrane and the supporting structure. , in which the insulating barrier comprises a set of parallelepiped insulating elements juxtaposed on the carrier structure in a plurality of parallel rows and retaining devices each arranged between two rows of insulating elements to maintain the insulating elements against the carrier structure, each an insulating member having two opposite longitudinal edges adjacent to a respective retainer, the longitudinal edge of the insulating member each having a bearing surface for engagement with the retainer, wherein a retainer includes: spacing attached to the structu carrier, a support member disposed held by the spacing member at a fixed distance from the supporting structure, an elongate holding member arranged in a longitudinal direction of the rows of insulating elements, the holding member being guided in translation relative to the spacer member to be spaced and closer to the wall, an elastic member disposed in abutment between the support member and the holding member, the elastic member being constrained in compression between the spacing member and the holding member for biasing the holding member towards the supporting structure so as to press the holding member along its length along the corresponding bearing surface a respective insulating element of each of the two rows of insulating elements between which the retaining device is disposed. According to embodiments, such a tank may include one or more of the following features. According to one embodiment, an insulating element has in each case a lower panel on its outer surface closest to the supporting structure, the lower panel of the insulating element having two protrusions towards the retaining device arranged along the two longitudinal edges 20 of the insulating member, the projecting portion of the lower panel each having the bearing surface on which the holding member is supported. According to one embodiment, the support member is elongated and arranged in the longitudinal direction of the insulating element rows, and the support member and the holding member each comprise a profiled body including an intermediate surface. elongate and two elongated lateral surfaces, the lateral surfaces being each disposed on one side of the intermediate surface along the length of the intermediate surface, the lateral surfaces being perpendicular to the supporting structure, the lateral surfaces of the supporting member cooperating with the lateral surfaces of the holding member so as to guide in translation the holding member relative to the spacer member. According to one embodiment, the lateral surfaces of the support member and the holding member comprise a stop system capable of limiting the movement of the holding member relative to the support member between two stop positions. According to one embodiment, the elastic element consists of a plurality of springs arranged at a regular pitch in the longitudinal direction of the rows of insulating elements between the support member and the holding member. According to one embodiment, the retaining device comprises a second support member held by a second spacing member at a fixed distance from the supporting structure, the holding member being guided in translation relative to the two parts of the body. spacing by the two support members. According to one embodiment, the spacer is attached to the carrier wall with a stud and a nut, the stud being attached to the carrier wall and the nut being screwed onto the stud so as to clamp the member spacing against the carrier wall. According to one embodiment, the spacer member is a cylindrical spacer traversed by the stud on the axis of the spacer, the nut bearing against the spacer in the direction of the axis of the spacer. spacer. According to one embodiment, the spacing member is a spacer traversed by a stud and screwed on the stud against the carrier wall, the stud being fixed to the supporting structure. According to one embodiment, the spacer has a groove on its circumference, a circlip mounted in the groove, a washer resting on the circlip and the support member resting on the washer. According to one embodiment, the spacer comprises a portion having a hexagonal section and a deformable portion capable of locking the spacer on the stud.

According to one embodiment, the spacing member comprises a collar resting on a wedge, the wedge being in abutment on the bearing structure and the wedge is traversed by the stud. According to one embodiment, the retaining device has a height less than the thickness of the insulating elements, the insulating barrier of the vessel wall further comprising an intermediate insulating element arranged between the two insulating elements to fill the gap. between the retaining device and the upper surface of the insulating elements. According to one embodiment, the elongated support member has a length of about 250mm. Such a tank can be part of a land storage facility, for example to store LNG or be installed in a floating structure, coastal or deep water, including a LNG tank, a floating storage and regasification unit (FSRU) , a floating production and remote storage unit (FPSO) and the like. According to one embodiment, a vessel for the transport of a cold liquid product comprises a double hull and a aforementioned tank disposed in the double hull. According to one embodiment, the invention also provides a method of loading or unloading such a vessel, in which a cold liquid product is conveyed through isolated pipes from or to a floating or land storage facility to or from the tank of the ship. According to one embodiment, the invention also provides a transfer system for a cold liquid product, the system comprising the abovementioned vessel, insulated conduits arranged to connect the vessel installed in the hull of the vessel to a storage facility. floating or terrestrial and a pump for driving a flow of cold liquid product through the insulated pipelines from or to the floating or land storage facility to or from the vessel vessel.

An idea underlying the invention is to provide a tank wall held on the wall of a bearing structure by retaining devices which elastically allow to exert a force on insulating elements of the tank wall and of absorbing the deformations of the supporting structure by means of elastic members working in compression, the force of the elastic members being predetermined by their longitudinal deformation of predetermined elongation. Certain aspects of the invention start from the idea of distributing the holding force by means of restraining devices exerting a force on extended bearing surfaces of the insulating elements so as to distribute the stresses. Some aspects of the invention are based on the idea of providing a tank that can be constructed in a short and inexpensive mounting time by providing retaining devices suitable for pre-assembly and pre-assembly. The invention will be better understood, and other objects, details, features and advantages thereof will become more apparent in the following description of several particular embodiments of the invention, given solely for illustrative purposes and not limiting, with reference to the accompanying drawings. In these drawings: FIG. 1 is a fragmentary perspective view broken away from a sealed and insulating tank wall 20 comprising holding devices according to one embodiment of the invention. FIG. 2 is a partial perspective view of a retaining device for the vessel wall of FIG. 1. FIG. 3 is a longitudinal sectional view of the retaining device of FIG. 2 along line III. Mr. FIG. 4 is a cross-sectional view of the tank wall along line IV-IV showing the retaining device located between two insulating elements; FIG. 5 is a partial perspective view of a variant of the retaining device; . - Figure 6 is a perspective view of a section of the retainer of Figure 5 along the line VI-VI. - Figure 7 is a partial perspective view of the anchoring means of the retaining devices of the tank wall of Figure L - Figure 8 is a partial view according to another partial embodiment in perspective of a sealed tank wall and an insulator comprising a retainer according to another embodiment. - Figure 9 is a schematic cutaway representation of a tank of LNG tanker and a loading / unloading terminal of this tank. Referring to Figure 1, we see the carrier structure 1 of the tank which is constituted here by the inner wall of the double hull of the ship. By convention, the term "above" will be referred to as a position closer to the interior of the vessel and "below" a position closer to the carrier structure 1, regardless of the orientation of the vessel wall. compared to the Earth's gravity field. The tank has a secondary insulating barrier maintained on the supporting structure 1. This secondary insulating barrier is surmounted by a secondary sealed barrier, which itself is surmounted by a primary insulating barrier 20 on which a primary watertight barrier rests. The secondary watertight barrier, the primary insulating barrier and the primary watertight barrier are not shown here. The secondary insulating barrier consists of a plurality of insulating elements in the form of rectangular parallelepiped boxes 2 arranged side by side in the form of parallel rows so as to substantially cover the inner surface of the supporting structure 1. Each insulating box comprises a bottom panel 3 and a top panel 4 between which is an insulating foam 5. The bottom panels 3 of the boxes 2 rest on cords of putty 6 and on wedges 7 of square shape placed on the supporting structure 1 The caulk beads 6 form parallel lines in the direction of the length of the insulating boxes 2 and are themselves supported on the supporting structure 1 by means of a sheet of kraft paper (not shown) to avoid that the resin mastic cord 6 does not stick to the supporting structure 1. These mastic cords 6 thus allow, during dynamic deformation of the structure carrier 1, reduce the forces experienced by the caissons 2 due to said deformation. The mastic beads 6 are intended to make up the differences between the theoretical surface provided for the tank wall and the imperfect surface of the carrier structure 1 resulting from manufacturing tolerances. A top panel 4 further comprises two grooves 50 whose section is T-shaped inverted to receive weld wings angular unrepresented. The boxes 2 of the secondary insulating barrier are held against the supporting structure 1 by retaining devices 9 fixed to the wall 1 in a space formed by the spacing between two rows of insulating boxes 2. These retaining devices 9 are of shape elongate and are arranged in their length along the sides defining the length of the boxes 2. The rows of boxes 2 are therefore mutually spaced for the interposition of the retaining devices 9. Conversely, within a row, the boxes 2 may be juxtaposed very closely against each other so as to maximize thermal insulation.

The secondary sealing barrier not shown is composed of a plurality of edge strakes raised in a manner well known to those skilled in the art. The raised edges of each strake being welded to the weld wings. A primary insulating barrier, not shown, rests on the secondary sealing barrier. This insulating barrier can be constituted in different ways, for example by means of caissons having a structure similar to the caissons 2 of the secondary insulating barrier. In one embodiment, each primary insulating box is of rectangular parallelepiped shape of a height less than the boxes of the secondary insulating barrier 2 and comprises a bottom panel and a top panel. The bottom panel of the primary box has two longitudinal grooves for receiving the welding wings and the raised edges of the secondary sealing barrier. The top panel has two grooves with generally inverted T-shaped section, to also receive a welding flange on which are welded the raised edges of the strakes of the primary sealing barrier.

The boxes of the primary insulating barrier may be maintained on the secondary insulating barrier by various means well known to those skilled in the art. As an illustration, the means described in FR2887010 may be used on the secondary sealed barrier. Alternatively, it is possible to make a tank with a single sealed barrier and a single insulating barrier.

Referring to FIGS. 2 to 5, there will be described in more detail a retaining device 9 which retains the secondary insulating barrier on the supporting structure 1. As explained above, the secondary insulating barrier consists of a plurality of casings 2 arranged in the form of parallel rows. As can be seen in FIGS. 1 and 7, rows of studs 22 spaced at a regular pitch are welded to the supporting structure 1. The rows of boxes 2 are then placed between the rows of studs 22. A retaining device 9 is anchored to the supporting structure 1 by a row of studs 22. The retaining device 9 comprises upper profiles 11 aligned and juxtaposed along the row of studs 10. An upper profile 11 each comprises an intermediate plate 15 and two side plates 12 and 13 having a length of about 250mm. Lower profiles 14 have substantially the same shape as the upper profiles 11 and oppose them. The spacing between the side plates 12 and 13 of the upper profiles is less than the spacing between the side plates 31 and 32 of the lower profiles 14 so that the branches of the upper sections 11 fit into the lower profiles 14. Thus, the side plates 12 and 13 and 31 and 32 of the two sections are in sliding contact which allows the lower section 14 to slide along the profile parallel to the side plates.

Springs 21 are held compressed between the upper profile 11 and the lower profile 14. For this, each upper profile 11 is supported on a washer 41 held relative to the wall by means of a nut 23 screwed to a stud 22 welded to the wall.

The springs 21 exert, due to their compression, a force on the lower sections 14 in a direction perpendicular to the plane formed by the supporting structure 1, which allows the lower sections 14 to rest on a bottom panel 3 of a box 2 and thus keep the insulating elements in abutment against the shims 7.

In the longitudinal direction, a lower section 14 straddles two upper sections 11 so as to interlock with the two upper sections 11. In this way, the retaining device 9 is flexible when the carrier structure 1 is deformed and during cold setting of the insulating boxes 2. The retaining device 9 constructed in this way can have any length, for example the length of the carrier wall 1 or a fraction of this length. To maintain the springs 21, the intermediate plate 15 and 33 of each lower profile 14 and upper 11 comprises four lugs 18 and 36 distributed at a regular pitch along the longitudinal direction of the intermediate plates 15 and 33. These lugs 18 and 36 are also formed of tabs cut in the intermediate plates 15 and 33 and extending inwardly of the profile. These lugs 18 and 36 hold the springs 21 in position and perpendicular to the supporting structure 1. When the two sections 11 are aligned and juxtaposed, the lugs of each of the sections 11 are aligned and the outer lugs 17 and 18 of each section 11 or are spaced a distance substantially equal to the distance between the internal lugs of a profile. In this way, when the upper profiles 11 are juxtaposed and aligned, all the springs 21 of the retaining device 9 are evenly spaced. This makes it possible to distribute the compression force induced by the springs 21 in a uniform manner. This force is applied to your lower sections 14 on the insulating boxes 2.

As shown in Figure 4, to form a bearing surface for the lower sections 11, the bottom panels 3 secondary insulating boxes 2 overflow on their long sides. In this way, the plate 33 of the lower profile 14 rests on the projecting portion 24 of the bottom panel along its long side.

Thus, the lower profile 14 distributes the force, induced by the springs 21, along an elongate bearing surface belonging to the bottom panels 3. Any stress concentration is then avoided. Thus, deterioration of the insulating boxes 2 during the deformation of the carrier structure 1 is avoided. FIG. 4 shows one of the advantages of the retaining device 9. Indeed, it has a height relative to the supporting structure 1 which is smaller than the height of the insulating boxes 2. This is made possible by the fact that the retaining device 9 is supported on the bottom panels 3. Thus, it is not subjected to the lowest temperatures because of its distance from the primary waterproof membrane. This device can therefore be manufactured with non-specific materials at cryogenic temperatures such as conventional steels and stainless steels. Moreover, the maintenance of the box 2 by its bottom panel 3 avoids the problems of differential thermal shrinkage. After the establishment of the insulating casings 2, the space between the two insulating casings 2 can be filled with a flexible and insulating lining 51 such as glass wool. With this lining, the space between the studs 22 between two insulating boxes 2 is also filled. Furthermore, in Figure 4, we see in more detail the means which provide support to the upper profiles 11. For each upper profile 11, the retaining device 9 comprises a spacer 10 in the form of a tube. This spacer 10 passes through the respective upper section 11 in a hole in the middle. The spacer 10 rests on a wedge 7. A stud 22 welded between two insulating caissons 2 or at the corners of four insulating caissons 2 juxtaposed crosses the spacer 10 in a bore and has an upper portion extending beyond the upper end of the spacer 10. This part of the bolt 22 is threaded. The nut 23 is screwed onto the threaded portion of the bolt 22 and clamps the washer 41 on the spacer 10 itself in contact with the shim 7. The intermediate plate 15 of the upper profile 11 is held by the springs 21 resting on the lower surface of the washer 22. In this way, the washer 22 creates a bearing surface on which rests the upper profile 11 which has a spacing relative to the wall of a predetermined value. This spacing corresponds to the sum of the thickness of the shim 7 and the length of the spacer 10. The drilling of the wedge 7 further comprises a countersink 35 in its portion oriented towards the supporting structure so as to present a space for the weld bead 37 connecting the stud to the supporting structure. Due to the predetermined length between the washer 41 and the carrier structure 1, the elongation of the springs 21 is predetermined in a normal operating state of the retaining device 9, that is to say when the bottom panel 3 of the box 2 is supported on the shim 7. In this way, the force induced by the spring 21 is predetermined. The springs 21 having a predetermined load, it is not necessary to adjust them individually during assembly, which facilitates assembly and reduces the assembly time. In case of deformation of the carrier structure 1 or during the cold setting of the insulating elements, the springs 21 allow elasticity of the holding device 9 which absorbs the induced deformations. To ensure their guidance in translation, the lower profiles 14 each comprise four tabs 19. These tabs 19 are each formed by a cut in the side plates 31 and 32 so that the end of the tongue 19 is directed towards the supporting structure 1 The tongue 19 is folded towards the inside of the lower profile 14 so as to protrude with respect to the lateral plate 31 or 32 inside the profile 37. These tongues 19 are distributed substantially at the mid-length between the middle of the section 14 and the end of the profile 14 on each side plate 31 or 32. Each tab 19 is slidably clipped into a rectangular opening 20 of a top profile 11. For this, the portion of the tongue 19 protruding at the interior of the lower profile 14 is inserted into a corresponding opening 20. The openings 20 have substantially greater length than the portion of the tabs 19 projecting inside the lower section 14. Thus, the tongue 19 can slide in the rectangular opening 20 thus allowing the vertical sliding of the lower sections 14 relative to the 11. This sliding is possible to stop position in which the end 53 of the tongue 19 comes into contact with the lower edge of the opening 20. This is particularly the case when the retainer 9 n is not yet assembled on the supporting structure 1. In this case, the springs 21 cause the maximum spacing between the lower profile 14 and the upper profile 11. The end 53 of the tongue 19 blocks any additional sliding and prevents disassembly profiles 11 and 14 and springs 21. The openings 20 further provide a sliding guide tabs 19 in the perpendicular direction e to the length of the restraint. These openings 20 are each located at half the distance between the spacer 10 and the end of the upper profile 11 on the side plates 12 and 13. A clearance between the tongues 19 and the openings 20 allows a slight inclination of the lower profiles 14 with respect to the upper profiles 11 as well as the absorption of the spacing tolerances of the studs 22. FIGS. 5 and 6 show a variant of the retaining device 9. In this variant, the upper 11 and lower 14 profiles are the same as in FIG. the embodiment described with reference to Figures 2 to 4. In this variant, the stud 22 is threaded over substantially its entire length. The spacer 28 is threaded over substantially its entire length and is screwed to the bolt 22 to bear against the shim 7. A counterbore can be made in the lower part of the spacer 28 over a length equal to about one diameter of the tapping to facilitate mounting by screwing the spacer 28. The upper profile 11 is traversed by the spacer 28 in a bore and is adapted to pivot and translate along the axis of this spacer 28. This spacer 28 further comprises a groove 25 on its outer cylindrical surface which receives a circlip 26 above the upper profile 11. The washer 22 bears between the circlip 26 and the upper section 11 at its lower surface. The top of the spacer 28 further comprises flats 29 distributed uniformly over the circumference of the spacer 28. These flats 29 form a hexagonal shape which allows to screw the spacer 28 with a conventional key. The spacer 28 comprises a deformed zone which makes it possible to brake the spacer 28 on the thread of the bolt 22 and thus lock it in position. The braking is performed by a radial deformation ovalising the upper part of the spacer 28 so as to increase the friction elastically during the screwing of the spacer 28 on the stud 22. Furthermore, the spacer 28 comprises a flange 30 in support against the shim 7. This flange 30 also prevents the collar 30 from disassembling the pre-assembled device since it can not pass through the bore of the upper profile 11. With reference to FIG. 8, another embodiment will be presented. In this embodiment, each bolt 22 is threaded over substantially its entire length and spacers 100 are threaded over their entire length. In the same manner as the previous embodiment, a counterbore may be provided in the spacer 100 to facilitate mounting. These spacers 100 are screwed to the bolts 22 to bear against the shims 7. Each spacer 100 has a flange 130 resting on a shim 7. The lower section 14 is replaced by a retaining piece 114 with a U-shaped section comprising an intermediate plate 133 between two flanges 131 and 132 raised towards the inside 20 of the tank. The intermediate plate 133 has bores 52 traversed by the spacers 100. Helical springs 121 are placed around the spacers 100 and are held in compression between the holding part 114 and washers 111. The washer 111 is fixed to the top of the spacer 100 by a Allen screw 123 screwed into the spacer 100. For this purpose, the stud 22 25 does not extend the entire length of the spacer 100 so as to allow the screwing of the screw 123 in the thread of the spacer 100. In the same manner as the embodiment above, the spacer 100 is deformed to allow the braking of the screw. The retaining piece 114 rests on the projecting portions 24 of the bottom panels 3 extending below the retaining piece 114. However, the section of the retaining piece 114 is wider at each bore 52 that on the portion of the retaining piece extending between two bores 52. Thus, the projecting portion 24 of the bottom panels 3 extends between the spacers 100 and has cutouts 53 having a semicircular shape to accommodate the Studs 22 and spacers 100. The embodiment described with reference to FIG. 8 makes it possible to provide a holding device with a small overall dimensions. The embodiments of the retaining devices 9 presented above have the advantage of being able to be pre-assembled and pre-assembled, which facilitates assembly and reduces assembly time. Furthermore, the length of the profiles 11, 14 and 114 can be adapted taking into consideration, for example, assembly ergonomics or logistics. The overall length of the retainer 9 may even be adapted according to these considerations. To assemble the secondary insulation barrier by means of these retaining devices 9 described above, it is possible to proceed in the following order: The studs 22 are welded to the supporting structure 1 at a regular pitch and so as to form rows. The shims 7 are then inserted on the studs 22, the 20 putty beads 6 are deposited on the lower panels 3 and the sheet of kraft paper is placed on the supporting structure 1. The boxes 2 are positioned between the rows of studs 22 then the pre-mounted retainers 9 are put in place and screwed onto the rows of studs 22. The remaining space between the caissons 2 is filled by means of the insulating packing 51. The tanks described above can be used in different types of installations such as land installations or in a floating structure such as a LNG tanker or other. Referring to Figure 9, a cutaway view of a LNG tank 70 shows a sealed and insulated tank 71 of generally prismatic shape mounted in the double hull 72 of the ship. The wall of the tank 71 comprises a primary sealed barrier intended to be in contact with the LNG contained in the tank, a secondary sealed barrier arranged between the primary waterproof barrier and the double hull of the ship, and two insulating barriers arranged respectively between the barrier primary leakproof barrier and the secondary sealed barrier, and between the secondary sealed barrier and the double hull 72. In a manner known per se, loading / unloading lines arranged on the upper deck of the ship can be connected, by means of appropriate connectors, to a marine or port terminal for transferring an LNG cargo to or from the tank 71. Figure 9 shows an example of a marine terminal including a loading and unloading station 75, an underwater pipe 76 and an onshore installation 77 The loading and unloading station 75 is a fixed off-shore installation comprising a movable arm 74 and a tower 78 which supports the movable arm 74. The movable arm 74 carries a bundle of insulated flexible pipes 79 which can connect to the loading / unloading pipes 73. The movable arm 74 can be adapted to all the LNG carriers . A connecting pipe (not shown) extends inside the tower 78. The loading and unloading station 75 allows the loading and unloading of the LNG tank 70 from or to the shore installation 77. This comprises liquefied gas storage tanks 80 and connecting lines 81 connected by the underwater line 76 to the loading or unloading station 75. The underwater line 76 allows the transfer of the liquefied gas between the loading or unloading station. The unloading 75 and the onshore installation 77 over a large distance, for example 25 km, which keeps the LNG ship 70 at a great distance from the coast during the loading and unloading operations. In order to generate the pressure necessary for the transfer of the liquefied gas, pumps on board the ship 70 and / or pumps equipping the shore installation 77 and / or pumps equipping the loading and unloading station 75 are used.

Although the invention has been described in connection with several particular embodiments, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the means described and their combinations if they are within the scope of the invention.

The use of the verb "to include", "to understand" or "to include" and its conjugated forms does not exclude the presence of other elements or steps other than those set out in a claim. The use of the indefinite article "a" or "an" for an element or a step does not exclude, unless otherwise stated, the presence of a plurality of such elements or steps.

In the claims, any reference sign in parentheses can not be interpreted as a limitation of the claim.

Claims (17)

  1. REVENDICATIONS1. A sealed and thermally insulating vessel arranged in a supporting structure (1) for containing a fluid, in which a wall of the vessel comprises a waterproof membrane and an insulating barrier arranged between the waterproof membrane and the supporting structure, in which the insulating barrier comprises a set of parallelepiped insulating elements (2) juxtaposed on the carrier structure (1) in a plurality of parallel rows and retaining devices (9) each arranged between two rows of insulating elements (2) to hold the insulating elements against the carrier structure, each insulating element having two opposite longitudinal edges adjacent to a respective retaining device, the longitudinal edge of the insulating element each having a bearing surface to cooperate with the retaining device (9), in which a retaining device comprises: a spacer (10, 28, 100) attached to the carrier structure a support member (11, 111) held by the spacer member at a fixed distance from the supporting structure, an elongated holding member (14, 114) arranged in a longitudinal direction of the rows of insulating elements , the holding member being guided in translation relative to the spacer member to be spaced and closer to the wall, an elastic member (21, 121) disposed in abutment between the support member and the holding member, the elastic member being constrained in compression between the spacer member and the holding member to urge the holding member towards the supporting structure so as to support the member of the maintaining along its length along the corresponding bearing surface of a respective insulating element of each of the two rows of insulating elements between which the retaining device is disposed.
  2. 2. Sealed vessel according to claim 1, wherein an insulating element each comprises a lower panel (3) on its outer surface closest to the supporting structure, the lower panel of the insulating element having two projections in the direction the retaining device disposed along the two longitudinal edges of the insulating member, the projecting portion (24) of the lower panel each having the bearing surface on which the holding member is supported.
  3. 3. Sealed tank according to claim 1 or 2, wherein the support member (11) is elongated and arranged in the longitudinal direction of the rows of insulating elements of the insulating member, and the support member and the holding member (14) each comprise a profiled body including an elongate intermediate surface (15, 33) and two elongated lateral surfaces (12, 13, 38, 39), the lateral surfaces being each disposed on one side of the intermediate surface on the length of the intermediate surface, the lateral surfaces being perpendicular to the supporting structure, the lateral surfaces of the support member cooperating with the lateral surfaces of the holding member so as to guide in translation the holding member by relative to the spacing member.
  4. 4. Sealed vessel according to claim 3, wherein the lateral surfaces of the support member and the retaining member comprise a stop system (19, 20 34) adapted to limit the movement of the retaining member. relative to the support member between two stop positions.
  5. 5. Sealed vessel according to one of claims 1 to 4, wherein the elastic member is constituted by a plurality of springs (21, 121) arranged at a regular pitch in the longitudinal direction of the rows of insulating elements between l support member and the holding member.
  6. 6. Sealed vessel according to one of claims 1 to 5, wherein the retaining device comprises a second support member (11, 111) held by a second spacing member (10, 28, 100) at a distance fixed support structure (1), the holding member being guided in translation relative to the two spacers by the two support members.
  7. 7. Watertight tank according to one of claims 1 to 6, wherein the spacer member is attached to the carrier wall with a stud (11) and nut (12), the stud (11) being fixed to the wall carrier and the nut being screwed on the stud so as to tighten the spacing member against the carrier wall.
  8. 8. Sealed vessel according to claim 7, wherein the spacing member is a cylindrical spacer (10) traversed by the stud on the axis of the spacer, the nut bearing against the spacer in the direction of the axis of the spacer.
  9. 9. Sealed tank according to one of claims 1 to 6, wherein the spacer member is a spacer (28, 100) traversed by a stud (11) and screwed on the stud (11) against the carrier wall, the stud being attached to the carrier structure.
  10. 10. Sealed tank according to claim 9, wherein the spacer (28) has a groove on its circumference, a circlip mounted in the groove, a washer (41) bearing on the circlip and the support member s pressing the puck.
  11. 11. Sealed tank according to claim 10, wherein the spacer 15 comprises a portion having a hexagonal section and a deformable portion adapted to block the spacer on the stud (22).
  12. 12. Sealed tank according to one of claims 7 to 11, wherein the spacer member comprises a flange (30, 130) resting on a shim (7), the shim bearing on the bearing structure and the wedge is traversed by the stud 20 (22).
  13. Watertight vessel according to one of claims 1 to 12, wherein the retaining device (9) has a height less than the thickness of the insulating elements (2), the insulating barrier of the vessel wall further comprising a an intermediate insulating element disposed between the two insulating elements to fill the gap between the retaining device and the upper surface of the insulating elements.
  14. 14. Sealed tank according to one of claims 1 to 13 wherein the elongate bearing member (11) has a length of about 250mm.
  15. 15. Ship (70) for the transport of a cold liquid product, the vessel comprising a double hull (72) and a tank (71) according to one of claims 1 to 14 disposed in the double hull.
  16. 16. Use of a ship (70) according to claim 15 for the loading or unloading of a cold liquid product, in which a cold liquid product is conveyed through insulated pipes (73, 79, 76, 81) from or to a floating or land storage facility (77) to or from the vessel vessel (71).
  17. 17. Transfer system for a cold liquid product, the system comprising a ship (70) according to claim 15, insulated pipes (73, 79, 76, 81) arranged to connect the tank (71) installed in the hull. the vessel to a floating or land storage facility (77) and a pump for driving a flow of cold liquid product through the insulated pipelines from or to the floating or land storage facility to or from the vessel vessel.
FR1162214A 2011-12-21 2011-12-21 Waterproof and insulated tank with restraint device Active FR2984992B1 (en)

Priority Applications (1)

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FR1162214A FR2984992B1 (en) 2011-12-21 2011-12-21 Waterproof and insulated tank with restraint device

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Application Number Priority Date Filing Date Title
FR1162214A FR2984992B1 (en) 2011-12-21 2011-12-21 Waterproof and insulated tank with restraint device
KR1020147020350A KR102022978B1 (en) 2011-12-21 2012-11-16 Sealed and insulating vessel equipped with a restraining device
PCT/FR2012/052648 WO2013093262A1 (en) 2011-12-21 2012-11-16 Fluidtight and insulating tank equipped with a retention device
CN201280063067.9A CN103998853B (en) 2011-12-21 2012-11-16 Seal and thermally insulated container

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FR2984992A1 true FR2984992A1 (en) 2013-06-28
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FR (1) FR2984992B1 (en)
WO (1) WO2013093262A1 (en)

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KR101722241B1 (en) * 2015-07-15 2017-04-11 한국해양과학기술원 Lower panel apparatus with leveling wedge fixing device for cargo containment system of lng carrier and the manufacturing method thereof
FR3042253B1 (en) 2015-10-13 2018-05-18 Gaztransport Et Technigaz Sealed and thermally insulated tank
FR3073271B1 (en) * 2017-11-06 2019-11-01 Gaztransport Et Technigaz Sealed and thermally insulated tank
WO2019234360A2 (en) 2018-06-06 2019-12-12 Gaztransport Et Technigaz Thermally-insulating sealed tank
FR3082274A1 (en) 2018-06-06 2019-12-13 Gaztransport Et Technigaz Waterproof and thermally insulating tank
FR3082595A1 (en) 2018-06-13 2019-12-20 Gaztransport Et Technigaz Waterproof and thermally insulating tank
FR3089597A1 (en) 2018-12-06 2020-06-12 Gaztransport Et Technigaz Watertight and thermally insulating tank

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FR2527544A1 (en) * 1982-06-01 1983-12-02 Gaz Transport SEALED AND THERMALLY INSULATING TANK INTEGRATED WITH THE CARRIER STRUCTURE OF A SHIP AND SHIP COMPRISING SAME
FR2798902A1 (en) * 1999-09-29 2001-03-30 Gaz Transport & Technigaz Thermally-insulated tank integrated into load-bearing structure of ship employs lower density foam block insulation adhered over transoms
WO2008147003A1 (en) * 2007-05-29 2008-12-04 Hyundai Heavy Industries Co., Ltd. Lng storage tank insulation system having welded secondary barrier and construction method thereof

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FR2709725B1 (en) * 1993-09-09 1995-11-10 Gaz Transport Watertight and thermally insulating tank integrated into the supporting structure of a ship having a simplified angle structure.
FR2724623B1 (en) * 1994-09-20 1997-01-10 Gaztransport Et Technigaz Improved waterproof and thermally insulating tank integrated into a carrier structure
FR2877639B1 (en) * 2004-11-10 2006-12-15 Gaz Transp Et Technigaz Soc Pa Sealed and thermally insulated tank integrated with the shelling structure of a ship
FR2887010B1 (en) 2005-06-10 2007-08-10 Gaz Transp Et Technigaz Soc Pa Sealed and thermally insulated tank
KR101607558B1 (en) * 2009-11-26 2016-03-30 대우조선해양 주식회사 Insulation panel installation structure of a liquified gas storage tank
KR100997764B1 (en) * 2010-05-19 2010-12-02 삼성중공업 주식회사 Containment tank for liquefied natural gas

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FR2527544A1 (en) * 1982-06-01 1983-12-02 Gaz Transport SEALED AND THERMALLY INSULATING TANK INTEGRATED WITH THE CARRIER STRUCTURE OF A SHIP AND SHIP COMPRISING SAME
FR2798902A1 (en) * 1999-09-29 2001-03-30 Gaz Transport & Technigaz Thermally-insulated tank integrated into load-bearing structure of ship employs lower density foam block insulation adhered over transoms
WO2008147003A1 (en) * 2007-05-29 2008-12-04 Hyundai Heavy Industries Co., Ltd. Lng storage tank insulation system having welded secondary barrier and construction method thereof

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KR20140105026A (en) 2014-08-29
FR2984992B1 (en) 2015-03-27
CN103998853B (en) 2016-12-14
KR102022978B1 (en) 2019-09-19
WO2013093262A1 (en) 2013-06-27
CN103998853A (en) 2014-08-20

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