CN118056089A - Method for insulating space between panels - Google Patents
Method for insulating space between panels Download PDFInfo
- Publication number
- CN118056089A CN118056089A CN202280066484.2A CN202280066484A CN118056089A CN 118056089 A CN118056089 A CN 118056089A CN 202280066484 A CN202280066484 A CN 202280066484A CN 118056089 A CN118056089 A CN 118056089A
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- China
- Prior art keywords
- inter
- panel
- insulating
- panel space
- space
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- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 62
- 239000006260 foam Substances 0.000 claims abstract description 148
- 238000009413 insulation Methods 0.000 claims abstract description 101
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 239000011120 plywood Substances 0.000 claims description 28
- 239000000853 adhesive Substances 0.000 claims description 27
- 230000001070 adhesive effect Effects 0.000 claims description 27
- 239000011324 bead Substances 0.000 claims description 26
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 239000011491 glass wool Substances 0.000 claims description 14
- 238000000638 solvent extraction Methods 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 11
- 239000002655 kraft paper Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 239000011496 polyurethane foam Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 229920006302 stretch film Polymers 0.000 claims description 3
- 238000003780 insertion Methods 0.000 description 16
- 230000037431 insertion Effects 0.000 description 16
- 238000004873 anchoring Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
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- 239000012528 membrane Substances 0.000 description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 5
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229920001774 Perfluoroether Polymers 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
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- 239000007789 gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000003949 liquefied natural gas Substances 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000011495 polyisocyanurate Substances 0.000 description 2
- 229920000582 polyisocyanurate Polymers 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- -1 Polytetrafluoroethylene Polymers 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- MSKQYWJTFPOQAV-UHFFFAOYSA-N fluoroethene;prop-1-ene Chemical group CC=C.FC=C MSKQYWJTFPOQAV-UHFFFAOYSA-N 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 239000004620 low density foam Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 239000012720 thermal barrier coating Substances 0.000 description 1
- 239000002937 thermal insulation foam Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
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- 238000011144 upstream manufacturing Methods 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
- F17C3/02—Vessels not under pressure with provision for thermal insulation
- F17C3/025—Bulk storage in barges or on ships
- F17C3/027—Wallpanels for so-called membrane tanks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0147—Shape complex
- F17C2201/0157—Polygonal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/052—Size large (>1000 m3)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/03—Thermal insulations
- F17C2203/0304—Thermal insulations by solid means
- F17C2203/0329—Foam
- F17C2203/0333—Polyurethane
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/03—Thermal insulations
- F17C2203/0304—Thermal insulations by solid means
- F17C2203/0358—Thermal insulations by solid means in form of panels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/23—Manufacturing of particular parts or at special locations
- F17C2209/238—Filling of insulants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/012—Hydrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/035—Propane butane, e.g. LPG, GPL
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/033—Small pressure, e.g. for liquefied gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/031—Dealing with losses due to heat transfer
- F17C2260/033—Dealing with losses due to heat transfer by enhancing insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0102—Applications for fluid transport or storage on or in the water
- F17C2270/0105—Ships
- F17C2270/0107—Wall panels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a method for insulating an inter-panel space formed between a first insulating panel (1) and a second insulating panel (2) of a wall of a sealed and insulated tank for storing a cryogenic fluid, the first insulating panel comprising a first side (8) facing a second side (9) of the second insulating panel, the inter-panel space (7) being delimited by the first side and the second side, the method comprising the steps of: -placing at least one insert element (10) against a first side of a first insulation panel; and-injecting an expanding foam into the inter-panel space between the insert element and the second side of the second insulation panel such that the expanding foam expands to squeeze the insert element between said expanding foam and the first side of the first insulation panel.
Description
Technical Field
The present invention relates to the field of sealed and insulated tanks with membranes. In particular, the invention relates to the field of sealed and insulated tanks for storing and/or transporting liquefied gases at low temperature, such as tanks for transporting liquefied natural Gas (GNL), ammonia (NH 3), dry ice (CO 2 in solid form) or hydrogen at about-163 ℃ at atmospheric pressure. These tanks may be mounted on land or on floating structures. More particularly, the invention relates to the insulation of these tanks.
Background
A multi-layered tank structure has been described comprising a secondary insulation barrier, a secondary sealing membrane, a primary insulation barrier and a primary sealing membrane from outside the tank to inside the tank, the primary sealing membrane being intended to be in contact with the liquid contained in the tank. Such a tank comprises heat insulation panels arranged adjacent to each other to form a heat insulation barrier. However, there is an inter-panel space between the insulating panels. These spaces result in a reduction in the insulation efficiency of the insulation barrier. Therefore, in order to ensure the continuity of the insulating properties of the insulating barrier, it is necessary to fill these inter-panel spaces. There are several solutions. The addition of an insulating element comprising a sheath and a compressible material (such as glass wool) contained in the sheath has been described, for example, in document WO2019155158 A1. Prior to inserting the insulating element into the inter-panel space, the sheath is placed under vacuum, which enables the compressible material to be compressed for insertion. After insertion of the insulating element, the sheath is pierced so that the compressible material thus fills the inter-panel space. However, placing an element made of compressible material under vacuum is difficult to achieve.
A method for installing an insulation structure in the inter-panel space of a cryogenic liquid tank is also known from KR20180060576 a. The method comprises in particular inserting a piece of glass wool to fill the inter-panel space, adding a foam block in case the glass wool is not sufficiently thick with respect to the inter-panel space. In order to insert the foam block into the remaining space, the method comprises in particular a measuring step. The inventors have noted that in such tanks, this approach is difficult to implement and involves technical difficulties when implemented on a large scale. This is because there are many irregularities, such as offset or errors, caused by assembly and manufacture of the constituent elements of the tank. Therefore, the measurement step must be repeated for each inter-panel space.
Therefore, there is a real need to develop a reliable, efficient and easy to implement method of insulating the space between panels.
Disclosure of Invention
The idea forming the basis of the present invention is a method of insulating the space between panels, which method makes it possible to ensure the continuity of insulation between adjacent insulating panels.
Another idea forming the basis of the present invention is to install an effective and durable inter-panel insulation when there are considerable thermal constraints, in particular facing thermal expansion and contraction of the panels.
Another concept forming the basis of the present invention is to facilitate the installation of compressible insulation elements, such as glass wool, in the inter-panel space.
Another idea forming the basis of the invention is to facilitate the manufacture of sealed and insulated tanks.
According to one embodiment, the present invention provides a method of insulating an inter-panel space formed between a first and a second insulating panel of a wall of a sealed and insulated storage tank for storing a cryogenic fluid, the first insulating panel comprising a first side facing a second side of the second insulating panel, the inter-panel space being defined by the first side and the second side, the method comprising the steps of:
Placing at least one insert element against a first side of a first insulation panel,
-Injecting an expanding foam into the inter-panel space between the insert element and the second side of the second insulation panel such that the expanding foam expands to squeeze the insert element between said expanding foam and the first side of the first insulation panel.
By these features, the thermal insulation continuity between the first and second insulation panels is ensured by the expanded foam and the insert element. In addition, the in-situ expanded foam does not adhere directly to the first side of the first insulation panel due to the presence of the insert element, and is thus free to move relative to the first side of the first insulation panel. This makes it possible to reduce the risk of deterioration of the expanded foam, in particular in the case of a relative movement of the insulating panels with respect to each other, for example due to thermal shrinkage, thermal expansion or swelling, since in this case the expanded foam directly adhering to the sides of two adjacent insulating panels will tend to break, thereby compromising the insulating properties of the expanded foam.
According to embodiments, such a method may include one or more of the following features.
According to one embodiment, the method further comprises a step of partitioning the space between the panels, said partitioning step being performed before injecting the expanding foam.
By these features, the expanded foam remains inside the inter-panel space, thereby reducing the volumetric loss of expanded foam that may flow outside the inter-panel space.
According to a preferred embodiment, the expanded foam is injected in a liquid state.
According to one embodiment, the partitioning step comprises inserting a bottom strip into the inter-panel space, the bottom strip being located at a lower end of the inter-panel space and extending in a longitudinal direction of the inter-panel space over the entire length of the inter-panel space.
According to one embodiment, the width of the bottom strip is greater than or equal to the gap between the first side of the first insulation panel and the second side of the second insulation panel.
According to one embodiment, the bottom strip is compressed between a first side of the first insulation panel and a second side of the second insulation panel.
According to one embodiment, the bottom strip is compressed towards the lower end of the inter-panel space.
By these features, the bottom strip seals the lower end of the inter-panel space.
According to one embodiment, the partitioning step further comprises inserting a first side strip and a second side strip at the first side end and the second side end of the inter-panel space, respectively, the first side strip and the second side strip extending in a direction transverse to the longitudinal direction of the inter-panel space.
According to one embodiment, the width of the first side strip, the second side strip is greater than or equal to the gap between the first side of the first insulation panel and the second side of the second insulation panel. According to one embodiment, the first side strip or the second side strip is compressed between a first side of the first insulation panel and a second side of the second insulation panel.
According to one embodiment, the separating step comprises inserting at least one retaining strip into the inter-panel space, the retaining strip extending in a direction transverse to the longitudinal direction of the inter-panel space.
According to one embodiment, the retaining strap is located between the first side strap and the second side strap.
According to one embodiment, the partitioning step comprises covering the inter-panel space with a cover, the cover comprising an opening through which the expanding foam is injected into the inter-panel space.
By these features, the escape of the expanding foam is prevented.
According to one embodiment, the opening has a diameter of between 5mm and 30 mm, preferably a diameter of 20 mm.
According to one embodiment, the cover comprises a plurality of openings spaced apart from each other, the openings being positioned in the longitudinal direction of the cover.
According to one embodiment, the cover has the general shape of a cuboid with rounded edges.
According to one embodiment, the lid has the following dimensions:
-a length of between 1 meter (m) and 5 meters, for example 3.5 meters, preferably between 1.4 meters and 1.6 meters;
-a width between 15 centimeters (cm) and 50 cm, preferably between 20 cm and 30 cm;
The thickness is comprised between 10 millimeters (mm) and 60 mm, preferably between 20mm and 30 mm.
According to one embodiment, the cover has side edges that rest on the first and second insulating panels, and the cover includes a plurality of apertures formed in the side edges opposite the first or second insulating panels. Thus, the holes do not open into the inter-panel space.
According to one embodiment, the holes of the plurality of holes have the same or different dimensions.
By these features, the apertures make the cap lighter, thereby making it easier for an operator to pick up the cap.
According to one embodiment, the plurality of holes comprises oblong holes.
According to one embodiment, the cover is attached to the first and second insulating panels via attachment members. According to one embodiment, the attachment member is selected from: a screw and a toggle clamp, the screw being received, for example, in a threaded insert attached to the first insulation panel or the second insulation panel.
According to one embodiment, the attachment member passes through at least one of a plurality of holes formed in the cover. According to one embodiment, the attachment member passes through an oblong hole formed in the cover. The oblong holes enable easier adjustment of the attachment of the cover via the attachment member, in particular in order to compensate for tolerances in the relative positioning of the first insulating panel with respect to the second insulating panel.
According to one embodiment, the first and second insulating panels comprise two recesses along an edge of the first side of the first insulating panel and two recesses along an edge of the second side of the second insulating panel, respectively, the cover being attached to the first and second insulating panels via an anchoring system attached to the cover, the anchoring system being provided with one anchoring element for each recess, each anchoring element comprising: a centering cone and an inflatable seal positioned around the centering cone and connected to the inflation system. After insertion, each inflatable seal is inflated in the recess using a pneumatic source. Thus, given the orientation of the tapered surfaces, each inflatable seal exerts a downward force on the centering cone, which enables the cover to be held against the first and second insulating panels during expansion of the expanding foam. After the foam expansion step, the inflatable seal is deflated and the cap and anchoring system are removed.
By these features, centering of the lid covering the space between the panels is facilitated and any seal is optimally compressed to obtain a good seal.
According to one embodiment, the pneumatic source is common to the anchoring elements.
According to one embodiment, the plurality of holes are oblong holes separated from each other. In other words, there is no continuity between the oblong holes.
By these features, the cover is made lighter while maintaining good rigidity to perform the insulating method of the space between the panels, that is, maintaining sufficient rigidity to withstand the foam expansion pressure.
According to one embodiment, the cover comprises at least one handle attached to a surface opposite to the surface of the cover intended to be in contact with the expanding foam. Preferably, the cover comprises two handles.
According to one embodiment, the length of the at least one handle extends in a direction perpendicular to the length direction of the lid.
According to one embodiment, the at least one handle is located on an axis of symmetry of the length of the cap.
According to one embodiment, the two handles are spaced apart in the length direction of the lid.
According to one embodiment, the cover is positioned across the first and second insulating panels.
According to one embodiment, the cover is attached to the first and second insulating panels via seals.
By these features, the expanding foam does not spill out of the inter-panel space during expansion of the foam. The cover is attached in a manner that withstands the expansion pressure exerted by the expanding foam.
According to one embodiment, the seal extends over the entire length of the cap.
According to one embodiment, the seals on the first and second insulation panels are of sufficient thickness to form an excess foam discharge channel with the surface intended to be in contact with the expanding foam, said excess foam discharge channel being connected to a foam container located on one side of the first insulation panel and/or on one side of the second insulation panel, enabling any excess foam to be discharged during the expansion phase of the foam. For example, the foam container is a box made of wood or composite material.
According to one embodiment, the seal forming the excess foam discharge channel has a thickness of between 5 mm and 20 mm.
According to one embodiment, the seal forming the excess foam discharge channel comprises a closed cell ethylene-propylene-diene monomer (EPDM) foam strip. According to one embodiment, the seal forming the foam evacuation channel comprises neoprene adhesive.
According to one embodiment, the cover is transparent, preferably under the trade name Lu Xite, which is more widely knownPolymethyl methacrylate (PMME).
By these features, it is facilitated for the operator to perform the task of the method, in particular during the injection and expansion steps of the expanded foam, since the operator can observe the foam expansion in real time, thus more easily adjusting the amount of expanded foam to be injected.
According to one embodiment, the lid has a tongue protruding from the surface of the lid intended to be in contact with the expanding foam.
By these features, the expanding foam is prevented from overflowing the inter-panel space, especially in the case where the foam continues to expand after the cover is removed.
According to one embodiment, the tongue extends over the entire length of the lid.
According to one embodiment, the tongue has a height of between 2 and 15 mm.
According to one embodiment, the tongue has a width smaller than the gap between the first side and the second side.
According to one embodiment, the cap is made of Polytetrafluoroethylene (PTFE).
According to one embodiment, the film covers the surface of the cover intended to be in contact with the expanding foam. According to one embodiment, the film is non-tacky. According to one embodiment, the membrane is made of PTFE.
According to one embodiment, the film is made of Perfluoroalkoxy (PFA) or fluoroethylene propylene (FEP) having similar properties to PTFE.
By these features, the expanding foam does not adhere to the cap, which facilitates removal of the cap after the foam expansion step.
According to one embodiment, the method further comprises the step of drying the expanded foam.
According to one embodiment, the method further comprises the step of removing the cover.
According to one embodiment, the method further comprises the step of removing the foam container.
According to one embodiment, the method further comprises the step of leveling excess foam present in the foam discharge channel.
According to one embodiment, the foam is injected until the foam reaches the height of the first and second insulation panels.
According to one embodiment, the injection of the expanding foam is a first expansion foam injection, the method further comprising at least a second foam injection, the second foam injection being performed after expansion of the expanding foam of the first foam injection.
By these features, the operator can adjust the amount of the expansion foam injected during the last foam injection by taking into account the amount of expansion foam injected and the height of the expansion foam produced, to prevent the expansion foam from overflowing the inter-panel space.
According to one embodiment, a foam injection gun is used to inject the expanding foam.
According to one embodiment, prior to injecting the expanding foam, the method comprises:
Placing the inflatable device in an uninflated state in a region defined between at least one of the first and second insulating panels and a third insulating panel adjacent to said first or second insulating panel, the region being transverse to the inter-panel space, and the inflatable device being placed facing the inter-panel space,
-Inflating the inflatable device such that said inflatable device in inflated condition rests at least on the third insulating panel and covers the first side end of the inter-panel space to retain the expanded foam inside the inter-panel space during injection and expansion of the expanded foam.
According to one embodiment, prior to injecting the expanding foam, the method comprises:
Placing an inflatable device in an uninflated state in an area defined between at least one of a first and a second insulating panel and a third insulating panel adjacent to said first or second insulating panel, the area being transverse to the inter-panel space, and the inflatable device being placed facing the inter-panel space,
-Inflating the inflatable device such that said inflatable device in inflated condition rests at least on the third insulating panel and covers the first side end of the inter-panel space to retain the expanded foam inside the inter-panel space during injection and expansion of the expanded foam.
By these features, the inflatable device can be easily inserted into the area defined between the three insulating panels. Furthermore, the inflation of the inflatable device enables counteracting any irregularities caused by assembly and manufacture, such as offset or errors.
According to one embodiment, the inflatable device in an inflated state covers the first side end or the second side end of the inter-panel space.
According to one embodiment, the inflatable device is placed facing the first side strap, and the inflatable device is inflated such that it abuts against the first side strap to hold the first side strap in a static position.
According to one embodiment, the inflatable device is placed facing the second side strap, and the inflatable device is inflated such that it rests against the second side strap to hold the second side strap in a static position.
Thus, the first side strip or the second side strip is kept in a static position over the entire length of the first side strip or the second side strip.
According to one embodiment, the area is defined between a first and a second heat insulating panel and a third and a fourth heat insulating panel adjacent to the first and the second heat insulating panel, wherein the inflatable device is inflated such that it rests on the third and fourth heat insulating panels and against the first side strip.
According to one embodiment, the area is defined between a first and a second heat insulating panel and a third and a fourth heat insulating panel adjacent to the first and the second heat insulating panel, wherein the inflatable device is inflated such that it rests on the third and fourth heat insulating panels and against the second side strip.
According to one embodiment, the inflatable device is removed after the foam expands. According to one embodiment, the inflatable device in a deflated state is removed.
According to one embodiment, the inflatable device comprises an inflatable element and a pump intended to inflate said inflatable element.
According to one embodiment, the inflatable element is selected from: pneumatic or hydraulic airbags.
According to one embodiment, the inflatable device comprises a pump selected from the group consisting of: manual pumps or automatic pumps. According to one embodiment, the pump is an air pump or a liquid pump.
According to one embodiment, the inflatable device includes a non-stick coating and/or a thermal barrier coating.
According to one embodiment, prior to injecting the expanding foam, the method comprises:
-placing a first rail made of an insulating material in an area defined between at least one of the first and second insulating panels and a third insulating panel adjacent to said first or second insulating panel, the area being transverse to the inter-panel space, and the rail being positioned to close a first side end of the inter-panel space during injection and expansion of the expanding foam.
According to one embodiment, the zone is defined between the first and second insulating panels and a third insulating panel adjacent to the first insulating panel and a fourth insulating panel adjacent to the second insulating panel.
According to one embodiment, the rung includes four arms between the first and second insulating panels, the second and third insulating panels, the third and fourth insulating panels, and the fourth and first insulating panels, respectively.
According to one embodiment, prior to injecting the expanding foam, the method comprises:
-placing a second crosspiece made of insulating material in a similar way to the first crosspiece, so as to close the second lateral ends of the space between the panels during the injection and expansion of the expanding foam.
According to one embodiment, the cryogenic fluid is for example liquefied natural Gas (GNL), hydrogen or liquefied petroleum Gas (GPL), preferably the cryogenic fluid is a cryogenic fluid. The expression "low temperature" refers to a liquid, for example, having a temperature below-20 ℃, for example below-50 ℃ and-163 ℃.
According to one embodiment, the expanded foam comprises a thermoset polymer or a thermoplastic polymer.
According to one embodiment, the expanded foam comprises a component selected from Polyurethane (PU), polyisocyanurate (PIR).
Therefore, the performance of the inter-panel heat insulation portion is more effective. In fact, polyurethane-based expanded foams have excellent heat insulating properties.
According to one embodiment, the expanded foam is a low density foam, i.e. a foam having a density between 30kg/m 3 and 70kg/m 3.
According to one embodiment, the expansion of the expanded foam is performed by a polymerization reaction.
According to one embodiment, the polymerization reaction is carried out at a temperature range between 10 degrees celsius (°c) and 150 ℃, for example between 10 ℃ and 100 ℃, preferably between 10 ℃ and 40 ℃.
According to one embodiment, the insert element covers at least 50%, preferably at least 90%, for example 95% or the entire first side of the first insulation panel.
According to one embodiment, the bottom strip comprises a material that can be compressed towards the lower end of the inter-panel space.
According to one embodiment, the bottom strip comprises a material selected from glass wool or polyurethane foam. The bottom strip preferably comprises polyurethane foam. Polyurethane foam has the advantage of adhering to concrete and enables any irregularities caused by assembly and manufacture to be eliminated.
According to one embodiment, the first side strip and the second side strip comprise glass wool or polymethyl methacrylate. Polymethyl methacrylate is especially under the trade name Lu XiteAnd known.
According to one embodiment, the retaining strip comprises glass wool.
According to one embodiment, the insert element is a compressible heat insulating element.
By these features, the relative movement of the insulation panels with respect to each other, for example due to thermal shrinkage, thermal expansion or swelling, is counteracted, in particular due to the presence of a compressed compressible insulation element having the ability to expand and contract in the thickness direction of the compressible insulation element. Furthermore, by these features, the compressible insulation element is inserted into the inter-panel space without being compressed upstream, which facilitates the insertion of the compressible insulation element. Furthermore, by these features, the pressure exerted by the expanding foam during the expansion phase of the foam is directed towards the compressible insulation element, resulting in compression of the compressible insulation element.
According to one embodiment, the compressible heat insulating element has the ability to compress in the thickness direction by more than 1 millimeter (mm), preferably more than 2 millimeters, for example between 1 and 10 millimeters, in response to the pressure exerted by the expansion of the expanding foam.
By these features, the inter-panel heat insulating portion can expand and/or compress in the thickness direction in response to shrinkage and expansion phenomena of the adjacent first heat insulating panel and/or second heat insulating panel.
According to one embodiment, the compressible heat insulating element has a thickness of 5 to 50 mm, preferably between 5 and 30 mm, for example 10 mm, before being compressed by the expanding foam.
According to one embodiment, the compressible heat insulating element has the shape of a plate covering the first side of the first heat insulating panel.
According to one embodiment, the compressible heat insulating element comprises glass wool, which is compressed during expansion of the expanding foam.
According to one embodiment, the insert element comprises kraft paper, a non-stick stretch film or a release agent, preferably the insert element comprises kraft paper. According to one embodiment, the release agent is a lubricant.
According to one embodiment, the method of insulating an inter-panel space further comprises placing a second insert element against a second side of a second insulating panel.
According to one embodiment, the second insert element comprises kraft paper, a non-stick stretch film or a release agent, preferably the second insert element comprises kraft paper.
By these features, the insert element does not adhere to the sides of the first and second insulation panels. Thus, the risk of degradation of the expanding foam is greatly reduced, in particular in the case of a relative movement of the insulating panels with respect to each other.
According to another embodiment, the compressible heat insulating element is attached to the first side of the first heat insulating panel during the pre-manufacturing step of the heat insulating panel.
According to one embodiment, the first or second insulating panel comprises insulating foam sandwiched between a first plywood sheet intended to carry the sealing film and a second plywood sheet intended to be placed on the support.
According to one embodiment, the first plywood of the first panel and the first plywood of the second panel each have a threaded hole, for example, formed in an insert attached to the first panel or the second panel, the cover is attached to the first plywood of the first insulation panel and the first plywood of the second insulation panel via an attachment member having threaded rods, each threaded rod being engaged in a hole formed in a side edge of the cover and a threaded hole formed in the first plywood of the first insulation panel or the second insulation panel.
According to one embodiment, the beads of adhesive are continuously disposed around the perimeter of the second plywood of the first and second insulation panels.
According to one embodiment, the separating step comprises:
-disposing a first bead of adhesive on the outer face of the second plywood sheet of the first insulation panel, the first bead of adhesive extending continuously along the inter-panel space;
-disposing a second bead of adhesive on the outer face of the second plywood sheet of the second insulation panel, the second bead of adhesive extending continuously along the inter-panel space.
In particular, during the manufacture of sealed and insulated tanks, a method of insulating the inter-panel space formed between the first and second insulating panels of the wall of the sealed and insulated tank for storing cryogenic fluid described above is performed. Such a tank is described, for example, in document FR2724623 or document FR 2599468.
Such a tank may form part of an onshore storage facility, for example for storing GNLs, or may be mounted on a offshore or deepwater floating structure, in particular a liquefied gas carrier, a Floating Storage and Regasification Unit (FSRU), a remote floating production and storage unit (FPSO), or the like.
Drawings
The invention will be better understood and other objects, details, features and advantages thereof will become more apparent from the following description of a plurality of specific embodiments of the invention, provided by way of non-limiting illustration only with reference to the accompanying drawings.
Fig. 1 schematically illustrates steps of a method of insulating an inter-panel space according to one embodiment.
Fig. 2 is a perspective view of two adjacent insulating panels and a bottom strip intended to be placed in an inter-panel space formed between the insulating panels.
Fig. 3 is a perspective view of two adjacent insulating panels similar to fig. 2 and an insert element intended to be placed in the inter-panel space formed between said insulating panels.
Fig. 4 is a cross-sectional view along the axis II-II of fig. 3 after the insertion element has been assembled.
Fig. 5 is a perspective view of two adjacent insulation panels similar to fig. 2 and 3 and two side strips intended to be placed in an inter-panel space formed between the insulation panels.
Fig. 6 is a perspective view of two adjacent insulation panels after attachment with a cover covering the space between the panels.
Fig. 7 is a perspective view of two adjacent insulation panels, the inter-panel space of which has been filled, according to one embodiment.
Fig. 8 is a perspective view of the intersection area between four insulated panels including an inflatable device in an inflated state according to one embodiment.
Fig. 9 is a schematic cross-sectional view of fig. 6 along axis III-III.
Fig. 10 is a top view of six insulation panels placed in pairs facing each other after attachment with a cover covering the space between the panels according to another embodiment.
Fig. 11 is a cross-sectional view of two adjacent insulation panels and a lid attached via a seal according to another embodiment.
Fig. 12 is a top view of a cap according to a variant embodiment.
Fig. 13 is a schematic perspective view of the cover shown in fig. 12.
Fig. 14 is a cross-sectional view of two adjacent insulation panels including adhesive beads according to another embodiment.
Fig. 15 is a bottom view of four insulation panels placed in pairs facing each other, including adhesive beads according to the embodiment shown in fig. 14.
Fig. 16 is a top view of two adjacent insulating panels with inter-panel spaces according to another embodiment.
Fig. 17 is a cross-sectional view of a first circular recess located in region III.
Detailed Description
Fig. 1 shows the steps of the method of insulating the space between panels. The inter-panel space is formed between a first and a second insulating panel for storing a cryogenic fluid, in particular a wall of a sealed and insulated tank for storing GNLs.
The first insulating panel has a first side positioned facing the second side of the second insulating panel. The inter-panel space is defined by a first side and a second side.
Step 100 corresponds to inserting an insert element in the inter-panel space. An insert element (e.g., glass wool or kraft paper) is placed against the first side of the first insulating panel. Step 100 is shown in particular in fig. 3 and 4 and is described in detail below.
Fig. 3 depicts adjacent first and second insulation panels 1, 2. The first and second insulation panels 1,2 each comprise a layer 3 of insulation foam, for example polyurethane foam, sandwiched between a first plywood 4 and a second plywood 5. The first plywood 4 is intended to carry a sealing film and the second plywood 5 is intended to be positioned on a support, such as a wall of a transport vessel. In particular, the bead of adhesive 6 is provided on the outer face of the second plywood 5 so that the support on which the first and second insulation panels 1,2 are to be placed is flattened. Other types of insulating panels may also be used. The inter-panel space 7 is formed by a gap between the first and second heat insulating panels 1,2, more specifically by a first side 8 of the first heat insulating panel 1 facing a second side 9 of the second heat insulating panel 2. Also shown is an insert element 10 above the inter-panel space 7 intended to be inserted in the inter-panel space 7. The insert element 10 is for example a glass wool board 10 or a substantially rectangular-shaped kraft paper. The insert element 10 is dimensioned such that it covers the first side 8 once fitted in the inter-panel space 7. The thickness of the insert element 10 is smaller than the gap between the first side 8 and the second side 9. Fig. 4 is a sectional view along the axis II-II of fig. 3 after insertion of the insertion element. The insert element 10 is positioned against the first side 8 and completely covers said first side 8. At this stage of the method, the inter-panel space 7 comprises an empty space (i.e. no material is present) between the insert element 10 and the second side 9. The empty space is intended to be filled later with expanded foam in the insulation process.
According to a variant embodiment of step 100, the insert element 10 is attached on the first side of the first insulation panel during the pre-manufacture of the insulation panels.
The next step 101 shown in fig. 1 corresponds to injecting an expanding foam into the inter-panel space between the insert element and the second side of the second insulation panel to fill the inter-panel space. The expanded foam is, for example, a polyurethane-based foam. This step of injecting the expanding foam enables filling of the inter-panel space 7.
The next step 102 is to expand the expanded foam. When the insert element is a compressible heat insulating element such as glass wool, this step enables compression of the insert element between the expanded foam and the first side of the first panel. For example, when the expanded foam is based on polyurethane, a chemical polymerization reaction is performed. The polymerization reaction enables an increase in the volume of the expanded foam initially injected. This increase in volume enables the compressible heat shield element to be pressed and compressed in the thickness direction against the first side of the first heat shield panel.
The polymerization is carried out at a temperature between 10 ℃ and 150 ℃ for 5 to 60 minutes. The polymerization reaction enables filling of the inter-panel space 7 and pressing of the insert element 10 against the first face 8.
As shown in fig. 2 to 7, the heat insulation method of the inter-panel space further includes a step of separating the inter-panel space. The separation step has a plurality of variant embodiments that can be performed alone or in combination.
Fig. 2 shows two adjacent insulating panels 1 and 2 and an inter-panel space 7 similar to fig. 3. The insert element 10 is not shown in fig. 2. A bottom strip 11 is also shown above the inter-panel space 7 before insertion into the inter-panel space 7. The bottom strip 11 has the general shape of a cuboid. Fig. 4 depicts the bottom strip 11 after insertion into the inter-panel space 7.
As shown in fig. 4, the partitioning step includes inserting the bottom strip 11 into the inter-panel space 7 up to the first lower end of the inter-panel space 7. This step is advantageously carried out before the insertion step of the insertion element 10. The first lower end is located between the second plywood 5 of the first insulation panel 1 and the second plywood 5 of the second insulation panel 2 and defines the bottom of the inter-panel space 7. The first lower end extends in the longitudinal direction of the inter-panel space 7 over the entire length of the inter-panel space 7. The width of the bottom strip 11 is at least equal to the gap between the first side 8 and the second side 9 to fill the bottom of the inter-panel space 7. Preferably, the bottom strip 11 is compressed between the first side 8 of the first insulation panel 1 and the second side 9 of the second insulation panel 2 and pressed towards the lower end of the inter-panel space. Such a bottom strip 11 makes it possible to prevent the flow of expanded foam out of the inter-panel space 7, in particular beyond the outer surface of the second plywood panel 5.
In the embodiment shown in fig. 5, the separation step comprises inserting the first side strip 12 and the second side strip 13 before or after insertion of the insertion element (preferably before insertion of the insertion element).
The first side strip 12 and the second side strip 13 are shown above the inter-panel space 7 before being inserted into the inter-panel space 7. The first side strips 12 and the second side strips 13 have the general shape of a cuboid and extend over the entire thickness of the insulating panels 1,2 in a direction transverse to the longitudinal direction of the inter-panel space 7. The first side strip 12 is inserted at a first side end of the inter-panel space 7 and the second side strip 13 is inserted at a second side end of the inter-panel space 7, which is at a distance from the first side end. This separation step makes it possible to prevent the expansion foam from flowing outside the inter-panel space 7 during the injection of the expansion foam, in particular at the first and second side ends of the inter-panel space 7.
As shown in fig. 6, the partitioning step further comprises covering the inter-panel space 7 with a cover 14 before the expanding foam injecting step. The cover 14 has a rectangular plate shape and is positioned across the first plywood 4 of the first insulation panel 1 and the first plywood 4 of the second insulation panel 2 and extends along the entire length of the inter-panel space to cover the upper surface of the inter-panel space 7. The cover 14 includes an opening 15 communicating with the space between the panels. The opening 15 is circular and enables injection of expanded foam into the inter-panel space between the insert element 10 and the second side of the second insulation panel 2. Subsequently, an expansion foam is injected into the inter-panel space, and then the expansion foam is expanded (not shown in fig. 6). After the expansion step, the expanded foam 21 fills the inter-panel space between the insert element 10 and the second side of the second insulation panel 2 and presses against the insert element 10, as shown in fig. 9. When the insert element is a compressible insulating element, the insert element is also compressed. The cover 14 is then removed to obtain the inter-panel heat insulation portion 16 filling the entire inter-panel space and having excellent heat insulation performance, as shown in fig. 7. Accordingly, the inter-panel heat insulation portion 16 is composed of the bottom strip 11, the insertion member 10, the first and second side strips 12 and 13, and the expanded foam.
According to a variant shown in fig. 8, the method comprises placing the inflatable device 17 in position before injecting the expanding foam. Fig. 8 shows the area between four insulating panels, including adjacent first 1, second 2, third 18 and fourth 19 insulating panels. The inter-panel space 7 and the first side strip 12 as described above are visible in fig. 8. As described above, the first heat insulation panel 1 has the first side surface facing the second side surface of the second heat insulation panel 2, thereby forming the inter-panel space 7. The first insulation panel 1 also has another side surface, which faces the side surface of the third insulation panel 18, thereby forming a second inter-panel space. Similarly, the second insulating panel 2 also has another side face, which faces the side face of the fourth insulating panel 19, thereby forming a third inter-panel space. Similarly, the third insulating panel 18 also has another side face, which faces the side face of the fourth insulating panel 19, thereby forming a fourth inter-panel space.
The inflatable device 17 is placed in an uninflated state in a region defined between the first, second, third and fourth insulating panels, which region is transverse to the inter-panel space 7, that is to say which region is formed by a succession of the second and third inter-panel spaces. The inflatable device 17 is placed facing the first side strip 12. The inflatable device is then inflated using a pump 20 (e.g. a manual pump) to hold the side straps 12 in a static position during the injection and expansion of the expanded foam and to eliminate any irregularities caused by assembly and manufacture prior to injection of the expanded foam into the inter-panel space 7.
Fig. 10 is a top view of six insulation panels placed in two parallel rows. Each of the four sides of each insulation panel 2 is disposed opposite and aligned with the side of the other insulation panel. Fig. 10 shows a cover 14 covering the inter-panel space between the adjacent first and second insulating panels 1 and 2. This embodiment differs from the previous embodiments in that two insert elements (e.g. kraft paper) are placed in the inter-panel space. The first insert element 111 is positioned against a first side of the first insulation panel 1 and the second insert element 112 is positioned against a second side of the second insulation panel 2.
The cover 14 is attached via attachment members 30 on the first and second insulating panels 1,2 to hold the cover 14 in a static position in a sealed manner so that the expanding foam does not spill over the cover 14 during expansion of the foam.
The method further includes, prior to injecting the expanding foam, placing a first rail 32 in position at the intersection of the first insulated panel 1, the second insulated panel 2, the third insulated panel 18, and the fourth insulated panel 19. The first rail 32 includes four arms, each of which is inserted into an inter-panel space formed between two of the above-described insulating panels 18. The first rail 32 is positioned to close a first side end of the inter-panel space.
The method further includes placing a second rail 33 in position at the intersection of the first insulated panel 1, the second insulated panel 2, the fifth insulated panel 28, and the sixth insulated panel 29 in a manner similar to the first rail. The second rail 33 is positioned to close the second side end of the inter-panel space. The method further comprises inserting a retaining strip 31, for example made of glass wool, which is placed between the first rail 32 and the second rail 33.
According to a variant embodiment shown in fig. 11, the cover 114 is attached using attachment means, for example using screws which can be screwed in particular into threaded inserts attached to the first or second insulating panels. The cover 114 rests on the first and second insulating panels via a first seal 131 extending along the edge of the first side 8 of the first insulating panel 1 over the entire length of the cover and a second seal 132 extending along the edge of the second side 9 of the second insulating panel 2 over the entire length of the cover. The gaps between the first and second seals 131 and 132 and the cover 114 form the excessive foam discharging passage 50. The excessive foam discharging passage 50 is used to discharge excessive foam during the inter-panel space insulation method.
In addition, a film 40 made of a non-stick material covers the surface of the cover intended to be in contact with the expanding foam. The film 40 is made of, for example, teflonMade, i.e., from PTFE.
Thus, in case the expanded foam expands and reaches a height greater than the heights of the first and second insulation panels 1 and 2, the excessive foam characterized by the foam volume exceeding the height is discharged to a container (not shown) located near the edge of the first or second panel 1 or 2 via the foam discharge passage 50.
Fig. 12 and 13 show a variant embodiment of a cap that can be used in the present method. The cover 115 has a generally rectangular shape with rounded edges. The cover 115 includes a plurality of openings 15 similar to that shown in fig. 6, the openings 15 being through openings and open toward the inter-panel space, the openings 15 being spaced apart from each other in the longitudinal direction of the cover 115. For example, each opening 15 has a diameter of 20 mm. The injection of the expanding foam may be performed independently via one or more openings 15. In particular, after the step of injecting the expanding foam, a plug may be used to close the opening 15 to contain the foam in the inter-panel space.
The cap 115 also has a plurality of oblong holes 41, some of which are of different sizes. Oblong holes 41 make the cover lighter and thus facilitate the operator in performing the method. The oblong holes 41 may be through holes and open with respect to the first or second insulating panel. Thus, the oblong holes 41 do not open into the inter-panel space.
The oblong holes 41 can also provide through passages to enable the cover 115 to be attached to the first and second insulating panels using attachment members.
According to a variant embodiment, the cap 115 has a tongue 34 protruding from the surface of the cap intended to be in contact with the expanding foam. Such tongue 34 makes it possible to prevent foam from overflowing the inter-panel space by limiting the volume of the inter-panel space.
According to another variant embodiment shown in fig. 14 and 15, the bottom strip 11 placed in the inter-panel space 7, in particular as shown in fig. 2,4, 6 and 9, is replaced by a bead of adhesive.
In this variant embodiment, the first bead of adhesive 42 is provided on the outer face of the second plywood 5 of the first insulation panel 1. The first bead of adhesive 42 extends continuously along the first insulating panel 1 in the vicinity of the inter-panel space 7 to form a first barrier intended to prevent the expansion foam from diffusing beyond the first bead of adhesive 42, in particular to prevent the expansion foam from flowing substantially under the first insulating panel 1.
The second bead of adhesive 43 is disposed on the outer face of the second plywood 5 of the second insulation panel 2. The second bead of adhesive 43 extends continuously along the second insulating panel 2 in the vicinity of the inter-panel space 7 to form a second barrier intended to prevent the expansion foam from diffusing beyond the second bead of adhesive 43, in particular to prevent the expansion foam from flowing substantially under the second insulating panel 2.
The distance D between the first bead of adhesive 42 and the second bead of adhesive 43 is equal to or greater than the distance between the first side 8 of the first insulating panel 1 and the second side 9 of the second insulating panel 2 forming the inter-panel space 7. The first bead of adhesive 42 and the second bead of adhesive 43 have the special effect of defining a lateral lower limit of the inter-panel space 7, so that the expanded foam can expand in the inter-panel space 7 in a manner similar to the bottom strip 11 shown in particular in fig. 2,4, 6 and 9.
Accordingly, the expanded foam injected into the inter-panel space will be partially contained in the space between the first adhesive bead 42 and the second adhesive bead 43, and partially contained in the inter-panel space 7.
The expanded foam then expands in a manner similar to the embodiments described above and forms an inverted-T shaped inter-panel insulation 116.
As shown in fig. 14, the same arrangement may be applied to a plurality of adjacent insulation panels, wherein each of the four insulation panels comprises beads of adhesive disposed around the periphery of the plywood panel 5.
Fig. 16 and 17 show another variant embodiment of the attachment of the cover. In this embodiment, the first and second insulating panels 1, 2 differ from the first and second insulating panels of fig. 4 in that they have first and second circular recesses 44, 45, 46, 47, respectively, along the edges of the first side 8 and along the edges of the second side 9 of the first insulating panel. The cover 117 is attached via an anchoring system provided with one anchoring element 51 for each circular recess 44, 45. The left-hand view shown in fig. 17 depicts the anchoring element 51 in a raised position, which is accommodated in the first recess 44. The anchoring element 51 comprises, starting from the cover 117, a rod 52 extending longitudinally in the recess 44 and attached to the centering cone 55. The centering cone has a tapered surface with its apex oriented upward and defining a cam surface 56. The anchor element 51 further comprises an inflatable annular seal 54 surrounding a cam surface 56 of the centering cone 55 and shown in the figure in a deflated state.
The right-hand view shown in fig. 17 depicts the anchor element 51 in a lowered position securing the cover 117 and seal 133 to the first and second insulated panels.
To this end, the inflatable annular seal 54 is inflated via an inflation system, such as a pump (not shown).
Inflation of the inflatable annular seal 54 causes:
The centering cone 55 moves downwards towards the second plywood of the insulating panel 2 to fix the cover 117 and compress the seal 133.
After the foam expansion step, the inflatable annular seal 54 is deflated and the cap and anchor system may be removed.
This explanation regarding the anchor elements 51 inserted in the recesses 44 applies in the same way to each anchor element inserted, for example, in the first and second circular recesses 45, 47 of the first and second insulating panels 1, 46, respectively.
This method of insulating the inter-panel space of the wall of a sealed and insulated storage tank is easily adaptable to achieve multiple types of inter-panel space insulation.
While the invention has been described in connection with a number of specific embodiments, it is to be understood that the invention is in no way limited to these specific embodiments, but includes all technical equivalents of the described components and combinations thereof, if such technical equivalents and combinations thereof fall within the scope of the invention.
Use of the verb "comprise" or "comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim.
In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Claims (18)
1. A method of insulating an inter-panel space formed between a first insulating panel (1) and a second insulating panel (2) of a wall of a sealed and insulated storage tank for storing a cryogenic fluid, the first insulating panel (1) comprising a first side (8) facing a second side (9) of the second insulating panel (2), the inter-panel space (7) being delimited by the first side (8) and the second side (9),
The method comprises the following steps:
Placing at least one insert element (10, 111, 112) against a first side (8) of the first insulating panel (1),
-Injecting an expanding foam into the inter-panel space (7) between the insert element (10, 111, 112) and the second side (9) of the second insulation panel (2) such that the expanding foam expands to squeeze the insert element (10, 111, 112) between the expanding foam and the first side (8) of the first insulation panel (1).
2. A method of insulating an inter-panel space according to claim 1, wherein the method further comprises a step of partitioning the inter-panel space (7) prior to injecting the expanded foam.
3. A method of insulating an inter-panel space according to claim 2, wherein the partitioning step comprises inserting a bottom strip (11) into the inter-panel space (7), the bottom strip (11) being located at a lower end of the inter-panel space (7) and extending in a longitudinal direction of the inter-panel space (7) over an entire length of the inter-panel space (7).
4. A method of insulating according to claim 3, wherein the bottom strip (11) comprises polyurethane foam.
5. The method of insulating an inter-panel space according to any one of claims 2 to 4, wherein the step of partitioning further comprises inserting a first side strip (12) and a second side strip (13) at a first side end and a second side end of the inter-panel space (7), respectively, the first side strip (12) and the second side strip (13) extending in a direction transverse to the longitudinal direction of the inter-panel space (7).
6. The insulation method according to any one of claims 2 to 5, wherein the partitioning step comprises inserting at least one retaining strip (31) into the inter-panel space (7), the retaining strip (31) extending in a direction transverse to the longitudinal direction of the inter-panel space (7).
7. Method of insulating an inter-panel space according to claim 5 or according to claims 5 and 6, wherein the first side strip (12) and the second side strip (13) comprise glass wool.
8. The method of insulating the inter-panel space of the wall of a sealed and insulated storage tank according to any one of claims 2 to 7, the method comprising, prior to injection of the expanding foam:
placing an inflatable device (17) in an uninflated state in an area defined between at least one of the first and second insulating panels and a third insulating panel adjacent to the first or second insulating panel, the area being transverse to the inter-panel space and the inflatable device being placed facing the inter-panel space (7),
-Inflating said inflatable device (17) such that said inflatable device (17) in inflated condition rests at least on said third insulating panel and covers a first lateral end of said inter-panel space (7) to retain said expanded foam inside said inter-panel space (7) during injection and expansion of said expanded foam.
9. A method of insulating the inter-panel space of the wall of a sealed and insulated tank according to claim 8 in combination with claim 5, wherein the inflatable device (17) is placed facing the first side strip (12), the inflatable device (17) being inflated such that the inflatable device (17) abuts against the first side strip (12) to hold the first side strip (12) in a static position.
10. A method of insulating an inter-panel space according to any one of claims 1 to 7, the method comprising, prior to injection of the expanding foam:
-placing a first crosspiece (31) made of insulating material in an area defined between at least one of the first and second insulating panels (1, 2) and a third insulating panel (18) adjacent to the first or second insulating panel, said area being transverse to the inter-panel space (7), and the crosspiece (31) being positioned to close a first lateral end of the inter-panel space (7) during injection and expansion of the expanded foam.
11. The method of insulating an inter-panel space according to any one of claims 2 to 10, wherein the partitioning step comprises covering the inter-panel space (7) with a cover (14), the cover (14) comprising an opening (15) through which the expanding foam is injected into the inter-panel space (7).
12. A method of insulating an inter-panel space according to claim 11, wherein the cover (14) has a tongue (34) protruding from a surface of the cover intended to be in contact with the expanding foam.
13. The insulation method of an inter-panel space according to claim 11 or 12, wherein the cover (14) is attached to the first and second insulation panels (1, 2) via attachment means.
14. The method of insulating the inter-panel space of the wall of a sealed and insulated storage tank of any of claims 1-13, wherein the expanded foam comprises polyurethane.
15. The method of insulating the inter-panel space of the wall of a sealed and insulated storage tank according to any of claims 1 to 14, wherein the insert element is a compressible insulating element (10).
16. The method of insulating an inter-panel space of a wall of a sealed and insulated storage tank of claim 15, wherein the compressible insulating element comprises glass wool that is compressed during expansion of the expanding foam.
17. The method of insulating the inter-panel space of the wall of a sealed and insulated storage tank according to any one of claims 1 to 14, wherein the insert element comprises kraft paper, a non-stick stretch film or a release agent, preferably the insert element comprises kraft paper.
18. Method of insulating the inter-panel space of the wall of a sealed and insulated tank according to any of claims 2 to 17, wherein the first and second insulating panels (1, 2) each comprise an insulating foam (3) sandwiched between a first plywood (5) intended to carry a sealing film and a second plywood (5) intended to be placed on a support,
Wherein the separating step comprises:
-arranging first beads of adhesive (42) on the outer face of a second plywood sheet (5) of the first insulating panel (1), said first beads of adhesive (42) extending continuously along the inter-panel space (7);
-arranging a second bead of adhesive (43) on the outer face of a second plywood sheet (5) of said second insulating panel (2), said second bead of adhesive (43) extending continuously along said inter-panel space (7).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2110346A FR3127486B1 (en) | 2021-09-30 | 2021-09-30 | Process for insulating an inter-panel space |
| FRFR2110346 | 2021-09-30 | ||
| PCT/EP2022/077354 WO2023052621A1 (en) | 2021-09-30 | 2022-09-30 | Method for insulating an inter-panel space |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118056089A true CN118056089A (en) | 2024-05-17 |
Family
ID=78086604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280066484.2A Pending CN118056089A (en) | 2021-09-30 | 2022-09-30 | Method for insulating space between panels |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20240065156A (en) |
| CN (1) | CN118056089A (en) |
| FR (1) | FR3127486B1 (en) |
| WO (1) | WO2023052621A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0017291B1 (en) * | 1979-03-29 | 1983-08-31 | Boelwerf N.V. | Fastener |
| FR2599468B1 (en) | 1986-06-03 | 1988-08-05 | Technigaz | THERMALLY INSULATING WALL STRUCTURE OF WATERPROOF TANK |
| FR2724623B1 (en) | 1994-09-20 | 1997-01-10 | Gaztransport Et Technigaz | IMPROVED WATERPROOF AND THERMALLY INSULATING TANK INTEGRATED INTO A CARRIER STRUCTURE |
| KR102535974B1 (en) | 2016-11-29 | 2023-05-24 | 대우조선해양 주식회사 | Heat insulation installation method for cryogenic liquid storage tank |
| FR3070747B1 (en) * | 2017-09-04 | 2021-01-08 | Gaztransport Et Technigaz | WATERPROOF AND THERMALLY INSULATING TANK WITH ANTI-CONVECTIVE COVER STRIP |
| FR3077764B1 (en) | 2018-02-09 | 2020-01-17 | Gaztransport Et Technigaz | PROCESS FOR MANUFACTURING A WATERPROOF AND THERMALLY INSULATING TANK WALL COMPRISING INTER-PANEL INSULATING CAPS |
-
2021
- 2021-09-30 FR FR2110346A patent/FR3127486B1/en active Active
-
2022
- 2022-09-30 CN CN202280066484.2A patent/CN118056089A/en active Pending
- 2022-09-30 WO PCT/EP2022/077354 patent/WO2023052621A1/en active Application Filing
- 2022-09-30 KR KR1020247013494A patent/KR20240065156A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR3127486B1 (en) | 2023-11-24 |
| KR20240065156A (en) | 2024-05-14 |
| WO2023052621A1 (en) | 2023-04-06 |
| FR3127486A1 (en) | 2023-03-31 |
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