EP0261033A1 - Insulating structure - Google Patents

Insulating structure Download PDF

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Publication number
EP0261033A1
EP0261033A1 EP87402065A EP87402065A EP0261033A1 EP 0261033 A1 EP0261033 A1 EP 0261033A1 EP 87402065 A EP87402065 A EP 87402065A EP 87402065 A EP87402065 A EP 87402065A EP 0261033 A1 EP0261033 A1 EP 0261033A1
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EP
European Patent Office
Prior art keywords
structure according
wall
foam
block
rigid
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
EP87402065A
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German (de)
French (fr)
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EP0261033B1 (en
Inventor
Jean-Louis Neret
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Priority to AT87402065T priority Critical patent/ATE59827T1/en
Publication of EP0261033A1 publication Critical patent/EP0261033A1/en
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Publication of EP0261033B1 publication Critical patent/EP0261033B1/en
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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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/001—Thermal insulation specially adapted for cryogenic vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3813—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container being in the form of a box, tray or like container
    • B65D81/3823—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container being in the form of a box, tray or like container formed of different materials, e.g. laminated or foam filling between walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls

Definitions

  • the casing 2 has good resistance to bending and can be used to hang the container support, for example feet (not shown), directly on its external wall 6, while maintaining a uniform support of the sheets on the foam.
  • the container then itself participates in the mechanical strength of the assembly, and one can do without any support frame, which is very advantageous from the point of view of space and construction cost, in particular for large containers.
  • the profile 13 is arranged so as to optimally cut the thermal connection between the sheets 6 and 9, which avoids the appearance of frost in the region of the rim 7.

Abstract

The inner wall of this container is filled with plates of hard foam (14, 15, 17, 19, 21) and placed under vacuum. The foam acts as a spacer between the two inner (1) and outer (2) casings of the container and prevents their deformation through the action of pressure. Its adhesive bonding to the outer wall (16) makes it possible to render the structure self-supporting. Application to parallelepipedal vessels intended for the deep- freezing of food, by immersion in liquid nitrogen, and to covers for tunnels for deep-freezing food. <IMAGE>

Description

La présente invention est relative à une structure isotherme du type comprenant une paroi extérieure rigide, une paroi intérieure rigide et, entre ces deux parois, des moyens d'isolation thermique. Elle s'applique notamment à la fabrication des récipients cryogéniques et des tunnels de refroidissement cryogéniques.The present invention relates to an isothermal structure of the type comprising a rigid outer wall, a rigid inner wall and, between these two walls, thermal insulation means. It applies in particular to the manufacture of cryogenic receptacles and cryogenic cooling tunnels.

L'invention a pour but de fournir une technique permettant de réaliser des structures isothermes de toutes formes, notamment de grandes dimensions qui soient relativement légères et peu encombrantes.The object of the invention is to provide a technique making it possible to produce isothermal structures of all shapes, in particular of large dimensions which are relatively light and compact.

A cet effet, l'invention a pour objet une structure isotherme du type précité, caractérisée en ce que les moyens d'isolation thermique comprennent un bloc de mousse à cellules fermées rigide formant entretoise entre les deux parois, la partie externe de ce bloc étant collée par sa face externe sur la paroi extérieure, tandis que la partie interne de ce bloc s'appuie librement sur la paroi intérieure.To this end, the subject of the invention is an isothermal structure of the aforementioned type, characterized in that the thermal insulation means comprise a block of rigid closed-cell foam forming a spacer between the two walls, the external part of this block being glued by its external face to the external wall, while the internal part of this block rests freely on the internal wall.

Suivant d'autres caractéristiques avantageuses de l'invention :
- l'espace délimité entre les deux parois est sous vide ;
- la partie externe du bloc de mousse est également collée par sa face interne à une paroi intermédiaire rigide.
- la paroi intermédiaire est reliée mécaniquement à la paroi extérieure, de préférence par l'intermédiaire d'un élément en matière isolante.According to other advantageous features of the invention:
- the space delimited between the two walls is under vacuum;
- The external part of the foam block is also glued by its internal face to a rigid intermediate wall.
- The intermediate wall is mechanically connected to the outer wall, preferably by means of an element made of insulating material.

Un exemple de réalisation de l'invention va maintenant être décrit en regard du dessin annexé sur lequel la figure unique représente en coupe une partie d'un récipient parallélépipédique conforme à l'invention.An exemplary embodiment of the invention will now be described with reference to the accompanying drawing in which the single figure shows in section a part of a rectangular container according to the invention.

Le récipient représenté au dessin est un bac ouvert de forme générale parallélépipédique destiné à contenir un liquide cryogénique, par exemple de l'azote liquide en vue de réaliser des opérations de surgélation par immersion de produits alimentaires dans ce liquide. Il est constitué d'une enveloppe intérieure 1 directement au contact du liquide, d'une enveloppe extérieure composite 2 au contact de l'air ambiant, et de moyens d'isolation thermique principaux 3 disposés entre ces deux enveloppes.The container shown in the drawing is an open container of generally parallelepiped shape intended to contain a cryogenic liquid, for example liquid nitrogen in order to carry out deep-freezing operations by immersion of food products in this liquid. It consists of an inner casing 1 directly in contact with the liquid, a composite outer casing 2 in contact with the ambient air, and main thermal insulation means 3 arranged between these two casings.

L'enveloppe 1 est en tôle d'acier inoxydable d'épaisseur au moins égale à 1,5 mm et à la forme d'un parallélépipède ouvert vers le haut. Le long de son bord supérieur, elle comporte une couronne extérieure 4 horizontale qui se termine par une aile verticale 5 dirigée vers le bas.The casing 1 is made of stainless steel sheet at least 1.5 mm thick and in the shape of a parallelepiped open upwards. Along its upper edge, it has a horizontal outer crown 4 which ends in a vertical wing 5 directed downwards.

L'enveloppe extérieure 2 est une structure composite constituée :
- d'une tôle extérieure 6 en acier inoxydable d'épaisseur inférieure ou égale à la tôle 1, s'étendant presque jusqu'au niveau de la couronne 4 et présentant sur son pourtour supérieur un rebord extérieur horizontal 7 qui se termine par une aile 8 dirigée vers le bas, cette dernière étant fixée par une soudure le long de l'aile 5 ;
- d'une tôle intérieure 9 en acier ou en aluminium, éventuellement perforée ou du type "Métal Déployé", qui se termine par un rebord extérieur horizontal 10 soudé sur son pourtour sur l'extrémité supérieure de la face interne de la tôle 6 et prolongeant vers l'intérieur le rebord 7. Le rebord 10 est constitué d'une collerette intérieure 11 en acier adjacente à la tôle 9, d'une couronne extérieure 12 en acier adjacente à la tôle 6, et, entre ces deux éléments, d'un profilé 13 en matière plastique à section en X couche, les éléments 11 et 12 étant fixes par collage dans les évidements correspondants à ce profilé ;
- d'une masse de mousse dure 14 maintenue sous vide. Cette mousse 14 peut, comme représenté, être constituée de plusieurs sous-blocs parallélépipédiques juxtaposés emplissant l'espace délimité par les tôles 6 et 9 et le rebord 10. Dans ce cas, ces sous-blocs sont collés à la tôle 6 sur toute leur surface extérieure, et ils sont également collés à la tôle 9 sur toute leur surface intérieure ainsi qu'au rebord 10. En variante, la mousse 14 peut être injectée et adhérer lors de sa formation aux tôles 6 et 9 préal ablement préparées de façon appropriée.The outer envelope 2 is a composite structure consisting of:
- an outer sheet 6 of stainless steel of thickness less than or equal to the sheet 1, extending almost to the level of the crown 4 and having on its upper periphery a horizontal outer rim 7 which ends in a wing 8 directed downwards, the latter being fixed by a weld along the wing 5;
- an inner sheet 9 of steel or aluminum, possibly perforated or of the "Expanded Metal" type, which ends in a horizontal outer rim 10 welded around its periphery on the upper end of the inner face of the sheet 6 and extending inwardly the rim 7. The rim 10 consists of an inner flange 11 of steel adjacent to the sheet 9, an outer ring 12 of steel adjacent to the sheet 6, and, between these two elements, d 'a profile 13 made of plastic with X-layer section, the elements 11 and 12 being fixed by gluing in the recesses corresponding to this profile;
- a mass of hard foam 14 maintained under vacuum. This foam 14 may, as shown, be made up of several juxtaposed parallelepipedal sub-blocks filling the space delimited by the sheets 6 and 9 and the flange 10. In this case, these sub-blocks are glued to the sheet 6 over their whole outer surface, and they are also bonded to the sheet 9 over their entire inner surface as well as to the rim 10. As a variant, the foam 14 can be injected and adhere during its formation to the sheets 6 and 9 previously suitably prepared .

Les enveloppes 1 et 2 délimitent un espace d'interparoi qu'emplissent les moyens d'isolation 3. Ces derniers sont constitués par un bloc rigide qui occupe la totalité de l'interparoi et a donc dans son ensemble la forme générale d'une cuvette parallélépipédique. Ce bloc est composé de trois sous-blocs de mousse en forme de cuvette emboîtés les uns dans les autres, avec interposition d'écrans réflecteurs entre ces sous-blocs et entre le sous-bloc le plus intérieur et l'enveloppe 1 adjacente. Chaque écran est constitué d'une feuille d'aluminium dont la face réfléchissante est tournée vers l'intérieur du récipient.The envelopes 1 and 2 delimit an inter-wall space which the insulation means 3 fill. The latter consist of a rigid block which occupies the entire inter-wall and therefore as a whole has the general shape of a bowl. parallelepiped. This block is composed of three sub-blocks of cup-shaped foam nested one inside the other, with the interposition of reflective screens between these sub-blocks and between the innermost sub-block and the adjacent casing 1. Each screen is made of aluminum foil, the reflective side of which is facing the inside of the container.

Ainsi, on trouve, de l'extérieur vers l'intérieur, huit cuvettes emboîtées les unes dans les autres : l'enveloppe extérieure 2, un sous-bloc 15 en mousse, un écran 16 en feuille d'aluminium, un sous-bloc 17 en mousse, un écran 18 en feuille d'aluminium, un sous-bloc 19 en mousse, un écran 20 en feuille d'aluminium, et l'enveloppe intérieure 1.Thus, there are, from the outside to the inside, eight bowls nested one inside the other: the outer casing 2, a foam sub-block 15, a screen 16 made of aluminum foil, a foam sub-block 17, a screen 18 of aluminum foil, a foam sub-block 19, a screen 20 of aluminum foil, and the inner casing 1.

Une masse de mousse dure complémentaire 21 complète les moyens d'isolation 3 pour combler l'espace délimité entre la cuvette 15, la couronne 4 avec son aile 5 et les rebords 7 et 10. De plus, la cuvette 15 peut être revêtue extérieurement d'un écran réfléchissant en feuille d'aluminium (non représenté), ou bien la face interne de la tôle 9 peut être rendue réfléchissante.A mass of complementary hard foam 21 completes the insulation means 3 to fill the space defined between the bowl 15, the crown 4 with its wing 5 and the edges 7 and 10. In addition, the bowl 15 can be coated on the outside with 'a reflective screen made of aluminum foil (not shown), or else the internal face of the sheet 9 can be made reflective.

A part les enveloppes 1 et 2, qui sont constituées à partir de tôles planes soudées les unes aux autres, chacune de ces cuvettes est constituée d'un ensemble de feuilles rectangulaires d'aluminium (écrans 16, 18 et 20) ou de plaques rectangulaires de mousse (cuvettes 15, 17 et 19, masse 21 juxtaposées.Apart from the envelopes 1 and 2, which are formed from flat sheets welded to each other, each of these bowls consists of a set of rectangular aluminum sheets (screens 16, 18 and 20) or rectangular plates of foam (bowls 15, 17 and 19, mass 21 juxtaposed.

Pour construire le récipient, on réalise les deux enveloppes 1 et 2, on met en place tous les éléments qui composent les cuvettes 15 à 20 dans l'enveloppe extérieure 2, puis on met en place la masse de mousse 21 et l'enveloppe intérieure 1 et l'on ferme hermétiquement par soudage de l'aile 5 de la couronne 4 sur l'aile 8 de l'enveloppe 2 l'espace d'interparoi délimité per les deux enveloppes. On peut en particulier effectuer toutes les soudures par soudage du types TIG (Tungsten Inert Gas). Ensuite, au moyen d'une pompe à vide, on établit un vide de l'ordre de 10⁻³mm Hg dans l'interparoi. Le vide est scellé au moyen d'un clapet spécial limiteur de pression (non représenté) qui évite l'apparition d'une surpression en cas de pénétration accidentelle de liquide cryogénique dans l'interparoi.To build the container, we make the two envelopes 1 and 2, we put in place all the elements that make up the bowls 15 to 20 in the outer envelope 2, then we put in place the mass of foam 21 and the inner envelope 1 and the seal 5 of the crown 4 is hermetically closed by welding on the wing 8 of the envelope 2 the inter-wall space delimited by the two envelopes. In particular, all TIG (Tungsten Inert Gas) welds can be welded. Then, by means of a vacuum pump, a vacuum of the order of 10⁻³mm Hg is established in the interwall. The vacuum is sealed by means of a special pressure relief valve (not shown) which prevents the appearance of an overpressure in the event of accidental penetration of cryogenic liquid into the interwall.

La mousse utilisée tant pour la masse 14 que pour les moyens d'isolation 3 est une mousse à cellules fermées suffisamment dure pour servir d'entretoise entre les plaques planes constituant les enveloppes 1 et 2. Comme la dureté d'une mousse croît avec sa densité tandis que ses performances d'isolation thermique décroissent lorsque cette densité augmente, on choisit un compromis ; des résultats satisfaisants ont été obtenus avec une mousse de polyuréthane ayant une masse volumique de l'ordre de 50 à 100 kg/m3, de préférence de 50 à 60 kg/m3. On peut en particulier faire appel à une mousse de polyuréthane ayant une telle masse volumique et disponible dans le commerce sous la marque "KLEGECEL", cette mousse ayant été préétuvée pour réduire le temps de pompage pour la mise sous vide.The foam used both for the mass 14 and for the insulation means 3 is a closed cell foam sufficiently hard to serve as a spacer between the flat plates constituting the envelopes 1 and 2. As the hardness of a foam increases with its density while its thermal insulation performance decreases when this density increases, a compromise is chosen; satisfactory results have been obtained with a polyurethane foam having a density of the order of 50 to 100 kg / m3, preferably 50 to 60 kg / m3. In particular, it is possible to use a polyurethane foam having such a density and commercially available under the brand "KLEGECEL", this foam having been pre-steamed to reduce the pumping time for vacuuming.

Pour maintenir le niveau de vide malgré le dégazage des cellules de la mousse, on prévoit dans la cuvette intérieure 19, du côté de l'enveloppe 1, un logement 22 dans lequel est disposée une quantité convenable d'un adsorbant 23. Pour un récipient d'azote liquide, on peut choisir comme adsorbant un mélange de charbon actif et de zéolites.To maintain the vacuum level despite the degassing of the foam cells, there is provided in the inner bowl 19, on the side of the casing 1, a housing 22 in which is disposed a suitable quantity of an adsorbent 23. For a container liquid nitrogen, a mixture of activated carbon and zeolites can be chosen as adsorbent.

Avant la mise sous vide, toutes les plaques constituant le récipient sont déjà au contact les unes des autres. La dureté de la mousse est choisie suffisante pour assurer un support efficace aux deux enveloppes lorsque le vide est réalisé. Ainsi, les deux enveloppes ne subissent pas de déformation notable, la pression atmosphérique assu rant un appui uniforme et régulier de leurs plaques sur la mousse, tout en permettant des dilatations-contractions relatives des deux enveloppes.Before the evacuation, all the plates constituting the container are already in contact with each other. The hardness of the foam is chosen to be sufficient to ensure effective support for the two envelopes when the vacuum is achieved. Thus, the two envelopes do not undergo any noticeable deformation, the atmospheric pressure ensuring a uniform and regular support of their plates on the foam, while allowing relative expansions-contractions of the two envelopes.

La mise sous vide de la mousse améliore son coefficient de conductibilité thermique et permet, pour des performances identiques, de réduire l'épaisseur totale de mousse et, par suite, le coût et l'encombrement du récipient. La présence des écrans d'aluminium réduit les pertes thermiques par rayonnement.The vacuuming of the foam improves its coefficient of thermal conductivity and makes it possible, for identical performance, to reduce the total thickness of foam and, consequently, the cost and the bulk of the container. The presence of aluminum screens reduces heat losses by radiation.

Par ailleurs, grâce à sa structure composite collée, l'enveloppe 2 présente une bonne résistance à la flexion et peut servir à l'accrochage de support du récipient, par exemple de pieds (non représentés), directement sur sa paroi externe 6, tout en conservant un appui uniforme des tôles sur la mousse. Le récipient participe alors lui-même à la résistance mécanique de l'ensemble, et l'on peut se passer de tout bâti-support, ce qui est très avantageux du point de vue de l'encombrement et du coût de construction, notamment pour les récipients de grandes dimensions.Furthermore, thanks to its bonded composite structure, the casing 2 has good resistance to bending and can be used to hang the container support, for example feet (not shown), directly on its external wall 6, while maintaining a uniform support of the sheets on the foam. The container then itself participates in the mechanical strength of the assembly, and one can do without any support frame, which is very advantageous from the point of view of space and construction cost, in particular for large containers.

Il est à noter à ce sujet que dans certains cas, le collage de la mousse 14 sur sa seule face extérieure, c'est-à-dire à la tôle 6, peut suffire pour assurer la résistance mécanique nécessaire du récipient. On peut alors se passer de la tôle 9, de préférence en la remplaçant par une feuille d'aluminium réfléchissante. Par ailleurs, lorsque la mousse 6 est collée aux deux tôles 6 et 9, la présence du rebord 10 est facultative et a essentiellement un rôle de sécurité.It should be noted in this regard that in some cases, the bonding of the foam 14 on its only outer face, that is to say the sheet 6, may be sufficient to ensure the necessary mechanical strength of the container. We can then do without sheet metal 9, preferably by replacing it with a reflective aluminum sheet. Furthermore, when the foam 6 is bonded to the two sheets 6 and 9, the presence of the rim 10 is optional and essentially has a safety role.

Dans tous les cas, le collage est réalisé dans une région isolée de la partie très froide du récipient, où la colle ne résisterait pas, et ce collage ne gêne pas les dilatations-contractions en partie froide.In all cases, the bonding is carried out in a region isolated from the very cold part of the container, where the glue would not resist not, and this bonding does not interfere with the expansions-contractions in the cold part.

Il est à noter que le profilé 13 est disposé de façon à couper de façon optimale le liaison thermique entre les tôles 6 et 9, ce qui évite l'apparition de givre dans la région du rebord 7.It should be noted that the profile 13 is arranged so as to optimally cut the thermal connection between the sheets 6 and 9, which avoids the appearance of frost in the region of the rim 7.

La même technique pourrait s'appliquer à la réalisation de récipients de révolution. Par exemple, pour un récipient cylindrique, on utiliserait un bloc de mousse façonné en forme d'anneau cylindrique, éventuellement en deux ou plusieurs secteurs. La fonction d'entretoise remplie par ce bloc permettrait de diminuer l'épaisseur des tôles constituant les deux enveloppes jusqu'à la valeur juste nécessaire pour effectuer les opérations de soudage sans détériorer la mousse.The same technique could be applied to the production of revolution vessels. For example, for a cylindrical container, a block of foam shaped like a cylindrical ring would be used, possibly in two or more sectors. The spacer function filled by this block would make it possible to reduce the thickness of the sheets constituting the two envelopes to the value just necessary to carry out the welding operations without damaging the foam.

En variante, pour faciliter le pompage lors de la mise sous vide de l'interparoi, on peut utiliser des blocs ou des plaques de mousse rainurés.Alternatively, to facilitate pumping during the evacuation of the interwall, it is possible to use blocks or grooved foam plates.

La technique de construction décrite ci-dessus peut également s'appliquer à la fabrication d'autres structures isolantes destinées à conserver une ambiance très froide, par exemple de tunnels de surgélation alimentaire ou de refroidissement cryogénique d'objets. La rigidité de la construction permet en effet de réaliser de façon économique et avec un encombrement réduit des formes ouvertes de grandes dimensions, notamment à faces planes, qui ne se déforment pratiquement pas, et en particulier des couvercles de tunnels à section en U inversé ayant une longueur de l'ordre de dix fois la largeur et supérieure à 10 m. The construction technique described above can also be applied to the manufacture of other insulating structures intended to maintain a very cold atmosphere, for example food freezing tunnels or cryogenic cooling of objects. The rigidity of the construction makes it possible to produce economically and with a reduced overall size open shapes of large dimensions, in particular with flat faces, which practically do not deform, and in particular tunnel covers with inverted U section having a length of the order of ten times the width and greater than 10 m.

Claims (16)

1. Structure isotherme, du type comprenant une paroi extérieure rigide (6), une paroi intérieure rigide (1) et, entre ces deux parois, des moyens d'isolation thermique (3, 14) caractérisée en ce que les moyens d'isolation thermique comprennent un bloc (14, 15, 17, 19, 21) de mousse à cellules fermées rigide formant entretoise entre les deux parois (1, 6), la partie externe (14) de ce bloc étant collée par sa face externe sur la paroi extérieure (16) tandis que la partie interne (19) de ce bloc s'appuie librement sur la paroi intérieure (1).1. Isothermal structure, of the type comprising a rigid exterior wall (6), a rigid interior wall (1) and, between these two walls, thermal insulation means (3, 14) characterized in that the insulation means thermal include a block (14, 15, 17, 19, 21) of rigid closed cell foam forming a spacer between the two walls (1, 6), the external part (14) of this block being glued by its external face on the outer wall (16) while the inner part (19) of this block bears freely on the inner wall (1). 2. Structure suivant la revendication 1, caractérisée en ce que le collage est réalisé sur toute la face externe de ladite partie externe (14).2. Structure according to claim 1, characterized in that the bonding is carried out on the entire external face of said external part (14). 3. Structure suivant l'une des revendications 1 et 2, car actérisée en ce que l'espace délimité entre les deux parois (1, 14) est sous vide.3. Structure according to one of claims 1 and 2, because actuated in that the space defined between the two walls (1, 14) is under vacuum. 4. Structure suivant l'une quelconque des revendications 1 à 3, caractérisée en ce que la mousse est une mousse de polyuréthane ayant une masse volumique de l'ordre de 50 à 100 kg/m3, de préférence de 50 à 60 kg/m3.4. Structure according to any one of claims 1 to 3, characterized in that the foam is a polyurethane foam having a density of the order of 50 to 100 kg / m3, preferably from 50 to 60 kg / m3 . 5. Structure suivant l'une quelconque des revendications 1 à 4, caractérisée en ce qu'une feuille (20) comportant une face réfléchissante tournée vers la paroi intérieure (1) est interposée entre le bloc de mousse (6, 8, 10, 20) et cette paroi.5. Structure according to any one of claims 1 to 4, characterized in that a sheet (20) having a reflecting face facing the inner wall (1) is interposed between the foam block (6, 8, 10, 20) and this wall. 6. Structure suivant l'une quelconque des revendications 1 à 5, caractérisée en ce que le bloc de mousse (14, 15, 17, 19, 21) est constitué de plusieurs sous-bloc juxtaposés.6. Structure according to any one of claims 1 to 5, characterized in that the foam block (14, 15, 17, 19, 21) consists of several juxtaposed sub-blocks. 7. Structure suivant la revendication 6, caractérisée en ce que des éléments (9, 16, 18) comportant une face réfléchissante tournée vers la paroi intérieure (1) sont interposées entre les sous-blocs (14, 15, 17, 19, 21).7. Structure according to claim 6, characterized in that elements (9, 16, 18) comprising a reflecting face facing the inner wall (1) are interposed between the sub-blocks (14, 15, 17, 19, 21 ). 8. Structure suivant l'une quelconque des revendications 1 à 7, caractérisée en ce qu'une matière adsorbante (23) est disposée dans le bloc de mousse, notamment en un emplacement adjacent à la paroi intérieure (1).8. Structure according to any one of claims 1 to 7, characterized in that an adsorbent material (23) is arranged in the foam block, in particular at a location adjacent to the interior wall (1). 9. Structure suivant l'une quelconque des revendications 1 à 8, caractérisée en ce qu'elle est à faces planes.9. Structure according to any one of claims 1 to 8, characterized in that it is with flat faces. 10. Structure suivant la revendication 9 prise ensemble avec l'une des revendications 6 et 7, caractérisée en ce que les sous-blocs (14, 15, 17, 19, 21) sont constitués de plaques de mousse planes.10. Structure according to claim 9 taken together with one of claims 6 and 7, characterized in that the sub-blocks (14, 15, 17, 19, 21) consist of flat foam plates. 11. Structure suivant l'une quelconque des revendications 1 à 10, caractérisée en ce que le bloc de mousse (14, 15, 17, 19, 21) comprend des éléments rainurés.11. Structure according to any one of claims 1 to 10, characterized in that the foam block (14, 15, 17, 19, 21) comprises grooved elements. 12. Structure suivant l'une quelconque des revendications 1 à 11, caractérisée en ce que la partie externe (14) du bloc de mousse (14, 15, 17, 19, 21) est également collée par sa face interne à une paroi intermédiaire rigide (9).12. Structure according to any one of claims 1 to 11, characterized in that the external part (14) of the foam block (14, 15, 17, 19, 21) is also bonded by its internal face to an intermediate wall rigid (9). 13. Structure suivant la revendication 12, caractérisée en ce que la paroi intermédiaire (9) est reliée mécaniquement à la paroi extérieure (6).13. Structure according to claim 12, characterized in that the intermediate wall (9) is mechanically connected to the outer wall (6). 14. Structure suivant la revendication 13, caractérisée en ce que ladite liaison est réalisée par l'intermédiaire d'un élément (13) en matière isolante.14. Structure according to claim 13, characterized in that said connection is made by means of an element (13) of insulating material. 15. Structure suivant l'une quelconque des revendications 1 à 14, caractérisée en ce qu'elle constitue un bac à liquide cryogénique.15. Structure according to any one of claims 1 to 14, characterized in that it constitutes a cryogenic liquid tank. 16. Structure suivant l'une quelconque des revendications 1 à 14, caractérisée en ce qu'elle constitue un couvercle à section en U inversé de tunnel de refroidissement cryogénique.16. Structure according to any one of claims 1 to 14, characterized in that it constitutes a cover with inverted U-section of cryogenic cooling tunnel.
EP87402065A 1986-09-18 1987-09-16 Insulating structure Expired - Lifetime EP0261033B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87402065T ATE59827T1 (en) 1986-09-18 1987-09-16 INSULATING STRUCTURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8613061 1986-09-18
FR8613061A FR2604157B1 (en) 1986-09-18 1986-09-18 ISOTHERMAL STRUCTURE

Publications (2)

Publication Number Publication Date
EP0261033A1 true EP0261033A1 (en) 1988-03-23
EP0261033B1 EP0261033B1 (en) 1991-01-09

Family

ID=9339065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402065A Expired - Lifetime EP0261033B1 (en) 1986-09-18 1987-09-16 Insulating structure

Country Status (11)

Country Link
EP (1) EP0261033B1 (en)
JP (1) JPS6392897A (en)
AT (1) ATE59827T1 (en)
AU (1) AU596216B2 (en)
CA (1) CA1318267C (en)
DE (1) DE3767257D1 (en)
DK (1) DK164658C (en)
ES (1) ES2021076B3 (en)
FR (1) FR2604157B1 (en)
GR (1) GR3001742T3 (en)
NZ (1) NZ221814A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664240A1 (en) * 1990-07-04 1992-01-10 Hernas Bernard Isothermal box and method of making it
WO1996032605A1 (en) * 1995-04-13 1996-10-17 Imperial Chemical Industries Plc Non-planar evacuated insulation panels and a method for making same
EP0744580A1 (en) * 1995-05-26 1996-11-27 AEG Hausgeräte GmbH Baking and roasting oven muffle
WO2002044032A2 (en) * 2000-11-29 2002-06-06 American Aerogel Corporation Insulated barriers and methods for producing same
US6632648B1 (en) 1996-05-14 2003-10-14 Elan Drug Delivery Limited Methods of terminal sterilization of fibrinogen
US7005181B2 (en) 2000-04-06 2006-02-28 American Aerogel Corporation Organic, open cell foam materials, their carbonized derivatives, and methods for producing same
FR2900135A1 (en) * 2006-04-24 2007-10-26 Philippe Assouly Liquid nitrogen receiving, preserving and transporting device for e.g. medical therapeutic purpose, has conical shaped single-use container adapted to shape of cotton balls for permitting utilization of balls until container drops nitrogen
NL2001023C2 (en) * 2007-11-20 2009-05-25 Coltratech B V Thermally insulated container with at least two stacked layers of vacuum insulation panels.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989000265A1 (en) * 1987-06-29 1989-01-12 Norman Lindsay Wood Angled laminate panel, apparatus and method of manufacture
WO2023196979A2 (en) * 2022-04-08 2023-10-12 Isthmus Cryotech, Inc. Cryogenic cooling apparatus and related methods

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Publication number Priority date Publication date Assignee Title
US2485647A (en) * 1945-10-26 1949-10-25 Glenn H Norquist Insulated container structure
US3695483A (en) * 1970-11-27 1972-10-03 Louis A Pogorski Thermal insulation and thermally insulated device
US3760971A (en) * 1970-03-23 1973-09-25 Marathon Oil Co Liquid cryogen storage tank for shore, ship or barge
FR2285569A1 (en) * 1974-09-20 1976-04-16 Nihon Soflan Chem & Eng THERMAL INSULATION TRIM FOR LOW TEMPERATURE TANKS CONTAINING LIQUEFIED OR SIMILAR GASES
EP0022384A1 (en) * 1979-06-08 1981-01-14 Technigaz Process for constructing a storage tank for a low-temperature liquid, and tank obtained
EP0099574A2 (en) * 1982-07-20 1984-02-01 Matsushita Electric Industrial Co., Ltd. Composite thermal insulator

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JPS597416B2 (en) * 1981-08-10 1984-02-18 株式会社クラレ Manufacturing method of milk protein fiber bundle molded product

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Publication number Priority date Publication date Assignee Title
US2485647A (en) * 1945-10-26 1949-10-25 Glenn H Norquist Insulated container structure
US3760971A (en) * 1970-03-23 1973-09-25 Marathon Oil Co Liquid cryogen storage tank for shore, ship or barge
US3695483A (en) * 1970-11-27 1972-10-03 Louis A Pogorski Thermal insulation and thermally insulated device
FR2285569A1 (en) * 1974-09-20 1976-04-16 Nihon Soflan Chem & Eng THERMAL INSULATION TRIM FOR LOW TEMPERATURE TANKS CONTAINING LIQUEFIED OR SIMILAR GASES
EP0022384A1 (en) * 1979-06-08 1981-01-14 Technigaz Process for constructing a storage tank for a low-temperature liquid, and tank obtained
EP0099574A2 (en) * 1982-07-20 1984-02-01 Matsushita Electric Industrial Co., Ltd. Composite thermal insulator

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664240A1 (en) * 1990-07-04 1992-01-10 Hernas Bernard Isothermal box and method of making it
WO1996032605A1 (en) * 1995-04-13 1996-10-17 Imperial Chemical Industries Plc Non-planar evacuated insulation panels and a method for making same
EP0744580A1 (en) * 1995-05-26 1996-11-27 AEG Hausgeräte GmbH Baking and roasting oven muffle
US6632648B1 (en) 1996-05-14 2003-10-14 Elan Drug Delivery Limited Methods of terminal sterilization of fibrinogen
US7005181B2 (en) 2000-04-06 2006-02-28 American Aerogel Corporation Organic, open cell foam materials, their carbonized derivatives, and methods for producing same
US7521485B2 (en) 2000-04-06 2009-04-21 American Aerogel Corporaition Organic, open cell foam materials, their carbonized derivatives, and methods for producing same
US8071657B2 (en) 2000-04-06 2011-12-06 American Aerogel Corporation Organic, open cell foam materials, their carbonized derivatives, and methods for producing same
US8436061B2 (en) 2000-04-06 2013-05-07 American Aerogel Corporation Organic, open cell foam materials, their carbonized derivatives, and methods for producing same
WO2002044032A2 (en) * 2000-11-29 2002-06-06 American Aerogel Corporation Insulated barriers and methods for producing same
WO2002044032A3 (en) * 2000-11-29 2003-12-18 American Aerogel Corp Insulated barriers and methods for producing same
FR2900135A1 (en) * 2006-04-24 2007-10-26 Philippe Assouly Liquid nitrogen receiving, preserving and transporting device for e.g. medical therapeutic purpose, has conical shaped single-use container adapted to shape of cotton balls for permitting utilization of balls until container drops nitrogen
NL2001023C2 (en) * 2007-11-20 2009-05-25 Coltratech B V Thermally insulated container with at least two stacked layers of vacuum insulation panels.

Also Published As

Publication number Publication date
ATE59827T1 (en) 1991-01-15
FR2604157A1 (en) 1988-03-25
ES2021076B3 (en) 1991-10-16
DK164658C (en) 1992-12-14
DK485487A (en) 1988-03-17
DK164658B (en) 1992-07-27
DK485487D0 (en) 1987-09-16
GR3001742T3 (en) 1992-11-23
FR2604157B1 (en) 1989-09-01
CA1318267C (en) 1993-05-25
DE3767257D1 (en) 1991-02-14
AU7860887A (en) 1988-03-24
EP0261033B1 (en) 1991-01-09
JPS6392897A (en) 1988-04-23
NZ221814A (en) 1989-01-06
AU596216B2 (en) 1990-04-26

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