EP0183594A1 - Device for the distribution of a cryogenic liquid - Google Patents

Device for the distribution of a cryogenic liquid Download PDF

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Publication number
EP0183594A1
EP0183594A1 EP19850402161 EP85402161A EP0183594A1 EP 0183594 A1 EP0183594 A1 EP 0183594A1 EP 19850402161 EP19850402161 EP 19850402161 EP 85402161 A EP85402161 A EP 85402161A EP 0183594 A1 EP0183594 A1 EP 0183594A1
Authority
EP
European Patent Office
Prior art keywords
plate
neck
pipe
solenoid valve
cryogenic liquid
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
EP19850402161
Other languages
German (de)
French (fr)
Other versions
EP0183594B1 (en
Inventor
Pierre Pelloux-Gervais
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Priority to AT85402161T priority Critical patent/ATE31689T1/en
Publication of EP0183594A1 publication Critical patent/EP0183594A1/en
Application granted granted Critical
Publication of EP0183594B1 publication Critical patent/EP0183594B1/en
Expired legal-status Critical Current

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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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/006—Adding fluids for preventing deformation of filled and closed containers or wrappers
    • 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
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • 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
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0119—Shape cylindrical with flat end-piece
    • 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
    • F17C2203/0391—Thermal insulations by vacuum
    • 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
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0326—Valves electrically actuated
    • 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

Definitions

  • the present invention relates to a device for dispensing a cryogenic liquid. It is intended in particular to provide a continuous stream of liquid nitrogen to a succession of cans scrolling on a conveyor, just before they are closed by crimping.
  • the dispensing device shown in the drawings in its position of use is intended to provide a continuous stream of liquid nitrogen to a succession of cylindrical metal cans (not shown) which scroll just below at high speed, contain a foodstuff such than a non-carbonated drink and are driven in horizontal translation by a conveyor (not shown).
  • This device essentially comprises a cryogenic container of conventional construction consisting of an internal tank 1 having a capacity of the order of one liter to several tens of liters, an external envelope 2 and a connecting neck 3, and disposed in the inverted position.
  • the internal reservoir 1 and the external envelope 2 which are for example made of aluminum, each have a cylindrical running part and two domed bottoms, the internal bottom being pierced with a large circular opening 4.
  • the neck 3 is a section of tube fixed with a seal at its ends around the periphery of the two openings 4, by means of respective solid rings 5, 6. These two rings are themselves welded around the openings 4, and the neck 3 can be made of stainless steel and be welded to the rings 5, 6.
  • the ring 5 defines inside the neck 3 a horizontal annular shoulder 7 provided with several tapped holes and facing downwards.
  • annular space 8 with vacuum-insulated insulation, the pumping being carried out by a connector 9.
  • the insulation could be produced from an injected insulating material such as polyurethane, or by any other suitable means.
  • the tubes 11 and 21 are welded to the plates 10, while the removable members 15 and 19 are fixed thereto by means of seals. Likewise, a seal is provided between the ring 5 and the plate 10.
  • the device also comprises a rigid ring 23 welded to the upper end of the casing 2 and provided with hooks 24 (one of which has been shown in FIG. 1), and a lower cover 25.
  • the latter consists of on the one hand a ferrule 26 welded to the lower end of the casing 2 and provided with at least one handling handle 27, and on the other hand a lower cover 28 detachably fixed on the ferrule 26 and crossed by the vent 11 and by the pipe 14.
  • connection box 29 (not shown in FIG. 2) is fixed to the ferrule 26.
  • This box comprises a solenoid valve assembly 30 - connection 31 mounted at the end of the pipe 12, a connection 32 to which the tube ends. 21, and an electrical connector 33 to which the electrical wires for controlling the solenoid valves 18 and 30 terminate.
  • the space remaining free in the neck and between the envelope 2 and the cover 25 is filled with an appropriate thermally insulating material 34.
  • the device In service, the device is suspended by the hooks 24 from a suitable support (not shown), the axis of the pipe 14 meeting at a right angle to that of the conveyor which carries the boxes to be pressurized.
  • connection 31 There is connected to the box 29 a line for drawing off a storage of liquid nitrogen under a pressure greater than atmospheric pressure (connection 31), a pressure gauge (connection 32) and an electrical supply cable (connection 33).
  • the solenoid valve 18 being closed, the solenoid valve 30 is opened, which causes the filling of the reservoir 1 to a high level detected by the pressure gauge.
  • the solenoid valve 18 is opened, which is fully submerged and therefore does not provide heat.
  • Frank liquid fills the sleeve 15 passes through the calibrated orifice of the insert 17 and flows freely in a thread along the axis of the pipe 14, without touching the latter.
  • the nitrogen vaporized in the tank 1 is evacuated at atmospheric pressure through the vent 11.
  • the jet of liquid nitrogen can be stopped at any time by simple. closing of the solenoid valve 18.
  • the filling of the reservoir 1 is carried out automatically by controlling the solenoid valve 30 in all or nothing from signals supplied by the manometer, in order to maintain an approximately constant height of liquid in the reservoir and , consequently, to obtain uniform conditions for the distribution of liquid nitrogen in the boxes to be pressurized.
  • the external part of the vent 11 can be shaped as a tunnel 11A overhanging the conveyor in order to create a more or less inert protective atmosphere in the gas volume existing in the boxes to be pressurized.
  • the connector 19 can be omitted, the electrical wires 20 passing along the vent 11.
  • the vent 11 can be bent at its upper end and be provided with a cage containing a float.
  • the vent 11 closes automatically when the liquid reaches the high level, and the pressure balances with that of the filling line (for example two absolute bars).
  • the device according to the invention applies to various cases where it is necessary to obtain a reliable and controlled injection of a clean cryogenic liquid, in particular at low flow rate.
  • the pipe 14 can be connected to a horizontal manifold itself provided with several discharge orifices arranged at several points of a packaging chain, for example to carry out inerting or localized cooling.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Vacuum Packaging (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

This device, which is in particular intended to inject liquid nitrogen in preserving cans so as to pressurize them, comprises an inverted cryogenic container (1,2) having a neck (3) closed by a detachable plate (10). All the elements (11,12,14,19,21) for operating the device extend through this plate in a sealed manner. The pouring conduit (14) has a calibrated orifice (17) mounted in the plate (10) and, above the latter, an electrically-operated valve immersed in the liquid. Application in the packing of flat beverages in metal cans.

Description

La présente invention est relative à un dispositif de distribution d'un liquide cryogénique. Elle est destinée notamment à fournir un filet continu d'azote liquide à une succession de boites de conserve défilant sur un convoyeur, juste avant leur fermeture par sertissage.The present invention relates to a device for dispensing a cryogenic liquid. It is intended in particular to provide a continuous stream of liquid nitrogen to a succession of cans scrolling on a conveyor, just before they are closed by crimping.

Les fabricants de récipients, en particulier de boites métalliques pour liquides de grande consommation tels que les boissons, ont été amenés, pour des raisons de prix de revient, à utiliser des épaisseurs de matière, en particulier de métal, de plus en plus réduites. Il en résulte une diminution de la résistance mécanique de ces récipients et un danger d'écrasement lorsqu'on les empile les uns sur les autres. Si les récipients contenant un produit dégageant un gaz par lui-même, par exemple une boisson carbonatée, résistent relativement bien à l'écrasement, il n'en est pas de même pour les récipients renfermant un liquide non gazeux, par exemple une boisson plate telle que l'eau minérale, un jus de fruit, etc. De plus, lorsque ces produits (jus de fruit par exemple) sont stérilisés et conditionnés à chaud, leur contraction au refroidissement risque de déformer la boite. On procède dans ces cas à une pressurisation artificielle des récipients, avant le sertissage de leur couvercle, par introduction de quelques gouttes de gaz liquéfié, généralement de l'azote, ce qui permet de résoudre le problème de l'écrasement.The manufacturers of containers, in particular of metal cans for liquids of great consumption such as drinks, have been led, for cost reasons, to use thicknesses of material, in particular of metal, increasingly reduced. This results in a reduction in the mechanical strength of these containers and a danger of crushing when stacked on top of each other. If the containers containing a product giving off a gas by itself, for example a carbonated drink, resist crushing relatively well, it is not the same for the containers containing a non-gaseous liquid, for example a flat drink such as mineral water, fruit juice, etc. In addition, when these products (fruit juice for example) are sterilized and packaged hot, their contraction on cooling risks deforming the box. In these cases, the containers are artificially pressurized, before the lid is crimped, by the introduction of a few drops of liquefied gas, generally nitrogen, which makes it possible to solve the problem of crushing.

Lorsque cette technique est appliquée à des machines de conditionnement à forte cadence, c'est-à-dire capables de remplir 30.000 à 120.000 récipients à l'heure disposés en une seule file, il ne peut être question d'interrompre l'écoulement d'azote liquide entre les récipients successifs ; on préfère alors laisser couler un filet continu d'azote liquide et admettre une petite perte de liquide entre les récipients successifs qui défilent à grande vitesse sous l'orifice de déversement de ce liquide.When this technique is applied to packaging machines at high speed, that is to say capable of filling 30,000 to 120,000 containers per hour arranged in a single file, there can be no question of interrupting the flow of liquid nitrogen between successive containers; it is therefore preferable to let a continuous stream of liquid nitrogen flow and allow a small loss of liquid between the successive containers which pass at high speed under the orifice for discharging this liquid.

L'invention a pour but de fournir un dispositif fiable dont la réalisation, l'utilisation et l'entretien soient particulièrement commodes. A cet effet, elle a pour objet un dispositif de distribution d'un liquide cryogénique, caractérisé en ce qu'il comprend :

  • - un récipient cryogénique à double paroi qui, dans sa position d'utilisation, est inversé et comporte d'une part un réservoir intérieur et une enveloppe extérieure présentant chacun une ouverture unique à leur extrémité inférieure, et d'autre part un col reliant les deux ouvertures ;
  • - une plaque fixée dans le col, à l'entrée du réservoir intérieur ; et
  • - une conduite d'amenée de liquide cryogénique, une conduite d'évent et une conduite de déversement, ces trois conduites traversant ladite plaque à joint étanche.
The invention aims to provide a reliable device whose production, use and maintenance are particularly convenient. To this end, it relates to a device for distributing a cryogenic liquid, characterized in that it comprises:
  • - a double-walled cryogenic container which, in its position of use, is inverted and comprises on the one hand an internal reservoir and an external envelope each having an opening single at their lower end, and on the other hand a neck connecting the two openings;
  • - a plate fixed in the neck, at the entrance to the internal tank; and
  • - A cryogenic liquid supply line, a vent line and a discharge line, these three lines passing through said seal plate.

Suivant des caractéristiques avantageuses :

  • - la conduite de déversement est pourvue d'une électrovanne d'arrêt disposée au-dessus de la plaque, et, éventuellement, cette dernière est également traversée à joint étanche par des moyens de comande de l'électrovanne ;
  • - la conduite d'évacuation est pourvue, au niveau de la plaque et au-dessous de l'électrovanne, d'un insert percé d'un orifice calibré de diamètre très inférieur à celui de cette conduite.
According to advantageous characteristics:
  • - The discharge pipe is provided with a stop solenoid valve disposed above the plate, and, optionally, the latter is also crossed with a seal by means of control of the solenoid valve;
  • - The evacuation pipe is provided, at the level of the plate and below the solenoid valve, with an insert pierced with a calibrated orifice of diameter much smaller than that of this pipe.

Un exemple de réalisation de l'invention va maintenant être décrit en regard des dessins annexés, sur lesquels :

  • - la figure 1 est une vue en coupe longitudinale d'un dispositif de distribution conforme à l'invention ;
  • - la figure 2 est une vue de détail, à plus grande échelle, de la partie inférieure de ce dispositif ; et
  • - la figure 3 est une vue en coupe transversale prise suivant la ligne III-III de la figure 2.
An exemplary embodiment of the invention will now be described with reference to the accompanying drawings, in which:
  • - Figure 1 is a longitudinal sectional view of a dispensing device according to the invention;
  • - Figure 2 is a detail view, on a larger scale, of the lower part of this device; and
  • - Figure 3 is a cross-sectional view taken along line III-III of Figure 2.

Le dispositif de distribution représenté aux dessins dans sa position d'utilisation est destiné à fournir un filet continu d'azote liquide à une succession de boites métalliques cylindriques (non représentées) qui défilent juste au-dessous à grande vitesse, contiennent une denrée alimentaire telle qu'une boisson non gazeuse et sont entraînées en translation horizontale par un convoyeur (non représenté).The dispensing device shown in the drawings in its position of use is intended to provide a continuous stream of liquid nitrogen to a succession of cylindrical metal cans (not shown) which scroll just below at high speed, contain a foodstuff such than a non-carbonated drink and are driven in horizontal translation by a conveyor (not shown).

Ce dispositif comprend essentiellement un récipient cryogénique de construction classique constitué d'un réservoir intérieur 1 ayant une capacité de l'ordre de un litre à plusieurs dizaines de litres, d'une enveloppe extérieure 2 et d'un col de liaison 3, et disposé en position inversée.This device essentially comprises a cryogenic container of conventional construction consisting of an internal tank 1 having a capacity of the order of one liter to several tens of liters, an external envelope 2 and a connecting neck 3, and disposed in the inverted position.

Le réservoir intérieur 1 et l'enveloppe extérieure 2, qui sont par exemple en aluminium, présentent chacun une partie courante cylindrique et deux fonds bombés, le fond intérieur étant percé d'une large ouverture circulaire 4.The internal reservoir 1 and the external envelope 2, which are for example made of aluminum, each have a cylindrical running part and two domed bottoms, the internal bottom being pierced with a large circular opening 4.

Le col 3 est un tronçon de tube fixé à joint étanche par ses extrémités sur le pourtour des deux ouvertures 4, par l'intermédiaire de bagues massives respectives 5, 6. Ces deux bagues sont elles-mêmes soudées autour des ouvertures 4, et le col 3 peut être en acier inoxydable et être soudé sur les bagues 5, 6. La bague 5 définit à l'intérieur du col 3 un épaulement annulaire horizontal 7 pourvu de plusieurs trous taraudés et faisant face vers le bas.The neck 3 is a section of tube fixed with a seal at its ends around the periphery of the two openings 4, by means of respective solid rings 5, 6. These two rings are themselves welded around the openings 4, and the neck 3 can be made of stainless steel and be welded to the rings 5, 6. The ring 5 defines inside the neck 3 a horizontal annular shoulder 7 provided with several tapped holes and facing downwards.

Entre le réservoir 1 et l'enveloppe 2 est délimité un espace annulaire 8 à isolation poussée sous vide, le pompage s'effectuant par un raccord 9. En variante, l'isolation pourrait être réalisée à partir d'une matière isolante injectée tel que du polyuréthane, ou par tout autre moyen approprié.Between the reservoir 1 and the envelope 2 is delimited an annular space 8 with vacuum-insulated insulation, the pumping being carried out by a connector 9. As a variant, the insulation could be produced from an injected insulating material such as polyurethane, or by any other suitable means.

Sur l'épaulement 7 s'applique et se centre une plaque massive 10, qui se fixe par quelques vis de façon détmntable sur la bague intérieure 5. Cette plaque 10 est traversée à joint étanche par les différents organes permettant le fonctionnement du dispositif :

  • - un tube-évent 11, qui s'étend verticalement de la partie supérieure du réservoir 1 à un emplacement situé au-dessous de la bague 6 ;
  • - un tube 12 d'alimentation en azote liquide, qui pénètre à joint étanche dans le tube 11 sous la bague 6 puis monte dans le tube pour en émerger, au sommet du réservoir 1, sous la forme d'une crosse de déversement 13 ;
  • - une conduite verticale 14 d'évacuation d'azote liquide munie à son extrémité supérieure (figure 2) d'un manchon 15, par exemple en matière plastique, qui est maintenu dans un perçage de la plaque 10 par un écrou 16. Dans le manchon 15 est positionné un insert 17 percé d'un orifice calibré dont le diamètre est très inférieur au diamètre de ce manchon et de la conduite 14. Le manchon 15 débouche au-dessus de la plaque 10, dans le réservoir 1, et est coiffé par une électrovanne 18 fixée sur la face supérieure de cette plaque. Cette électrovanne est une électrovanne cryogénique immergée d'un type disponible dans le commerce ?
  • - un raccord 19 servant au passage de fils électriques 20 de commande de l'électrovanne 18 ; et
  • - un dispositif de mesure de niveau qui, dans cet exemple, est constitué par un tube 21 destiné à être raccordé à un manomètre et se terminant, légèrement au-dessus de la plaque 10, par une cloche 22 ouverte vers le bas. Dans un but de clarification du dessin, seule la partie supérieure de ce dispositif a été représentée à la figure 2.
On the shoulder 7 is applied and is centered a massive plate 10, which is fixed by a few screws detmntably on the inner ring 5. This plate 10 is crossed with a seal by the various members allowing the operation of the device:
  • - A tube-vent 11, which extends vertically from the upper part of the tank 1 to a location below the ring 6;
  • - A tube 12 for supplying liquid nitrogen, which penetrates into the tube 11 with a gasket under the ring 6 and then rises in the tube to emerge therefrom, at the top of the tank 1, in the form of a discharge butt 13;
  • a vertical pipe 14 for discharging liquid nitrogen provided at its upper end (FIG. 2) with a sleeve 15, for example made of plastic, which is held in a hole in the plate 10 by a nut 16. In the sleeve 15 is positioned an insert 17 pierced with a calibrated orifice whose diameter is much less than the diameter of this sleeve and of the pipe 14. The sleeve 15 opens above the plate 10, in the reservoir 1, and is capped by a solenoid valve 18 fixed on the upper face of this plate. This solenoid valve is a cryogenic submerged solenoid valve of a commercially available type?
  • - A connector 19 for the passage of electric wires 20 for controlling the solenoid valve 18; and
  • a level measurement device which, in this example, consists of a tube 21 intended to be connected to a pressure gauge and ending, slightly above the plate 10, by a bell 22 open towards the low. In order to clarify the drawing, only the upper part of this device has been shown in FIG. 2.

Les tubes 11 et 21 sont soudés à la plaques 10, tandis que les organes démontables 15 et 19 y sont fixés par l'intermédiaire de joints d'étanchéité. De même, un joint d'étanchéité est prévu entre la bague 5 et la plaque 10.The tubes 11 and 21 are welded to the plates 10, while the removable members 15 and 19 are fixed thereto by means of seals. Likewise, a seal is provided between the ring 5 and the plate 10.

Le dispositif comporte encore une bague rigide 23 soudée sur l'extrémité supérieure de l'enveloppe 2 et pourvue de crochets 24 (dont l'un a été représenté à la figure 1), et un capot inférieur 25. Ce dernier est constitué d'une part d'une virole 26 soudée sur l'extrémité inférieure de l'enveloppe 2 et muni d'au moins une poignée 27 de manutention, et d'autre part d'un couvercle inférieur 28 fixé de façon démontable sur la virole 26 et traversé par l'évent 11 et par la conduite 14.The device also comprises a rigid ring 23 welded to the upper end of the casing 2 and provided with hooks 24 (one of which has been shown in FIG. 1), and a lower cover 25. The latter consists of on the one hand a ferrule 26 welded to the lower end of the casing 2 and provided with at least one handling handle 27, and on the other hand a lower cover 28 detachably fixed on the ferrule 26 and crossed by the vent 11 and by the pipe 14.

De plus, une boite de connexion 29 (non représentée sur la figure 2) est fixée sur la virole 26. Cette boîte comprend un ensemble électrovanne 30 - raccord 31 monté à l'extrémité de la conduite 12, un raccord 32 auquel aboutit le tube 21, et un raccord électrique 33 auquel aboutissent les fils électriques de commande des électrovannes 18 et 30.In addition, a connection box 29 (not shown in FIG. 2) is fixed to the ferrule 26. This box comprises a solenoid valve assembly 30 - connection 31 mounted at the end of the pipe 12, a connection 32 to which the tube ends. 21, and an electrical connector 33 to which the electrical wires for controlling the solenoid valves 18 and 30 terminate.

L'espace restant libre dans le col et entre l'enveloppe 2 et le capot 25 est empli d'une matière thermiquement isolante appropriée 34.The space remaining free in the neck and between the envelope 2 and the cover 25 is filled with an appropriate thermally insulating material 34.

En service, le dispositif est suspendu par les crochets 24 à un support approprié (non représenté), l'axe de la conduite 14 rencontrant à angle droit celui du convoyeur qui porte les boites à pressuriser.In service, the device is suspended by the hooks 24 from a suitable support (not shown), the axis of the pipe 14 meeting at a right angle to that of the conveyor which carries the boxes to be pressurized.

On raccorde à la boite 29 une conduite de soutirage d'un stockage d'azote liquide sous une pression supérieure à la pression atmosphérique (raccord 31), un manomètre (raccard 32) et un câble d'alimentation électrique (raccord 33).There is connected to the box 29 a line for drawing off a storage of liquid nitrogen under a pressure greater than atmospheric pressure (connection 31), a pressure gauge (connection 32) and an electrical supply cable (connection 33).

L'électrovanne 18 étant fermée, on ouvre l'électrovanne 30, ce qui provoque le remplissage du réservoir 1 jusqu'à un niveau haut détecté par le manomètre. Pour déverser l'azote liquide, on ouvre l'électrovanne 18, qui est entièrement immergée et n'apporte donc pas de chaleur. Du liquide franc emplit le manchon 15, traverse l'orifice calibré de l'insert 17 et s'écoule librement en un filet suivant l'axe de la conduite 14, sans toucher celle-ci. L'azote vaporisé dans le réservoir 1 s'évacue à la pression atmosphérique par l'évent 11.The solenoid valve 18 being closed, the solenoid valve 30 is opened, which causes the filling of the reservoir 1 to a high level detected by the pressure gauge. To discharge the liquid nitrogen, the solenoid valve 18 is opened, which is fully submerged and therefore does not provide heat. Frank liquid fills the sleeve 15, passes through the calibrated orifice of the insert 17 and flows freely in a thread along the axis of the pipe 14, without touching the latter. The nitrogen vaporized in the tank 1 is evacuated at atmospheric pressure through the vent 11.

On peut arrêter à tout moment le jet d'azote liquide par simple . fermeture de l'électrovanne 18. Le remplissage du réservoir 1 s'effectue automatiquement en commandant l'électrovanne 30 en tout ou rien à partir de signaux fournis par le manomètre, afin de conserver une hauteur de liquide à peu près constante dans le réservoir et, par suite, d'obtenir des conditions uniformes de distribution d"azote liquide dans les boites à pressuriser.The jet of liquid nitrogen can be stopped at any time by simple. closing of the solenoid valve 18. The filling of the reservoir 1 is carried out automatically by controlling the solenoid valve 30 in all or nothing from signals supplied by the manometer, in order to maintain an approximately constant height of liquid in the reservoir and , consequently, to obtain uniform conditions for the distribution of liquid nitrogen in the boxes to be pressurized.

Le dispositif décrit ci-dessus présente de nombreux avantages :

  • - A la construction, le fait de n'avoir qu'une ouverture par laquelle passent tous les organes nécessaires au fonctionnement facilite grandement la réalisation du récipient cryogénique. Il n'y a pas de bridage mécanique, et l'on évite ainsi les contraintes internes. Cet avantage est valable si l'isolation de l'interparoi 8 est constituée d'une matière isolante injectée et a fortiori dans le cas d'une isolation sous vide, dont l'épaisseur est plus faible.
  • - A l'utilisation, le fait que toutes les fonctions sont regroupées au bas du dispositif permet d'utiliser un système de connexion centralisé (boite de connexion 29). Cette commodité est appréciable à la fois au moment du montage et au moment d'une éventuelle intervention de maintenance.
  • - Pour démonter le dispositif, il suffit de déconnecter les liaisons de la boîte 29 ; de soulever le récipient pour le décrocher ; de le retourner, même s'il est plein d'azote liquide ; d'ôter le couvercle 28 et l'isolation 34 ; et de dévisser puis d'extraire la plaque 10, et avec elle l'ensemble des organes qu'elle porte. Ceci permet en particulier de changer l'insert 17 pour modifier le débit d'azote liquide.
  • - L'alimentation en azote liquide et l'évacuation d'azote gazeux à travers le col 3, à proximité immédiate de la conduite 14, contribuent au maintien en froid de la région inférieure du dispositif.
The device described above has many advantages:
  • - During construction, having only one opening through which all the organs necessary for operation pass greatly facilitates the production of the cryogenic container. There is no mechanical clamping, and internal stresses are thus avoided. This advantage is valid if the insulation of the interwall 8 consists of an injected insulating material and a fortiori in the case of vacuum insulation, the thickness of which is thinner.
  • - In use, the fact that all the functions are grouped together at the bottom of the device makes it possible to use a centralized connection system (connection box 29). This convenience is appreciable both at the time of assembly and at the time of a possible maintenance intervention.
  • - To dismantle the device, simply disconnect the connections from the box 29; lift the container to unhook it; return it, even if it is full of liquid nitrogen; to remove the cover 28 and the insulation 34; and unscrew then extract the plate 10, and with it all of the members that it carries. This allows in particular to change the insert 17 to modify the flow of liquid nitrogen.
  • - The supply of liquid nitrogen and the evacuation of gaseous nitrogen through the neck 3, in the immediate vicinity of the pipe 14, contribute to keeping the lower region of the device cold.

En variante, comme représenté à la figure 2, la partie extérieure de l'évent 11 peut être conformée en un tunnel 11A surplombant le convoyeur afin de créer une atmosphère protectrice plus ou moins inerte dans le volume gazeux existant dans les boîtes à pressuriser. Par ailleurs, le raccord 19 peut être supprimé, les fils électriques 20 passant le long de l'évent 11.As a variant, as shown in FIG. 2, the external part of the vent 11 can be shaped as a tunnel 11A overhanging the conveyor in order to create a more or less inert protective atmosphere in the gas volume existing in the boxes to be pressurized. Furthermore, the connector 19 can be omitted, the electrical wires 20 passing along the vent 11.

En variante également, l'évent 11 peut être coudé à son extrémité supérieure et y être muni d'une cage contenant un flotteur. Ainsi, l'évent 11 se bouche automatiquement lorsque le liquide arrive au niveau haut, et la pression s'équilibre avec celle de la ligne de remplissage (par exemple deux bars absolus).Alternatively also, the vent 11 can be bent at its upper end and be provided with a cage containing a float. Thus, the vent 11 closes automatically when the liquid reaches the high level, and the pressure balances with that of the filling line (for example two absolute bars).

Dans ce cas, on peut se passer du dispositif manométrique 21-22 et de l'électrovanne 30, car le maintien du liquide au niveau haut s'effectue automatiquement, et l'injection de l'azote liquide par la conduite 14 peut s'effectuer sous une certaine pression, ce qui permet par exemple d'effectuer une pulvérisation d'azote liquide sur une surface déterminée.In this case, one can do without the pressure device 21-22 and the solenoid valve 30, because the liquid is kept high at the automatic level, and the injection of liquid nitrogen through the pipe 14 can perform under a certain pressure, which allows for example to perform a spraying of liquid nitrogen on a determined surface.

On comprend que le dispositif suivant l'invention s'applique à divers cas où il est nécessaire d'obtenir une injection fiable et contrôlée d'un liquide cryogénique franc, notamment à faible débit. Si on le désire, la conduite 14 peut être reliée à un collecteur horizontal pourvu lui-même de plusieurs orifices de déversement disposés en plusieurs points d'une chaîne de conditionnement, par exemple pour réaliser un inertage ou un refroidisseτent localisé.It is understood that the device according to the invention applies to various cases where it is necessary to obtain a reliable and controlled injection of a clean cryogenic liquid, in particular at low flow rate. If desired, the pipe 14 can be connected to a horizontal manifold itself provided with several discharge orifices arranged at several points of a packaging chain, for example to carry out inerting or localized cooling.

Claims (13)

1. - Dispositif de distribution d'un liquide cryogénique, caractérisé en ce qu'il comprend : - un récipient cryogénique (1, 2) à double paroi qui, dans sa position d'utilisation, est inversé et comporte d'une part un réservoir intérieur (1) et une enveloppe extérieure (2) présentant chacun une ouverture unique (4) à leur extrémité inférieure, et d'autre part un col (3) reliant les deux ouvertures (4) ; - une plaque (10) fixée dans le col, à l'entrée du réservoir intérieur (1) ; et - une conduite (12) d'amenée de liquide cryogénique, une conduite d'évent (11) et une conduite de déversement (14), ces trois conduites traversant ladite plaque (10) à joint étanche. 1. - Device for distributing a cryogenic liquid, characterized in that it comprises: - a cryogenic container (1, 2) with double wall which, in its position of use, is inverted and comprises on the one hand an internal tank (1) and an external envelope (2) each having a single opening (4) at their lower end, and on the other hand a neck (3) connecting the two openings (4); - a plate (10) fixed in the neck, at the inlet of the interior tank (1); and - A line (12) for supplying cryogenic liquid, a vent line (11) and a discharge line (14), these three lines passing through said plate (10) with a tight seal. 2. - Dispositif suivant la revendication 1, caractérisé en ce que ladite plaque (10) est fixée de façon amovible sur une bague de liaison (5) reliant le col (3) au réservoir intérieur (1).2. - Device according to claim 1, characterized in that said plate (10) is removably attached to a connecting ring (5) connecting the neck (3) to the inner tank (1). 3. - Dispositif suivant l'une des revendications 1 et 2, caractérisé en ce que la conduite de déversement (14) est pourvue d'une électrovanne d'arrêt (18) disposée au-dessus de la plaque (10).3. - Device according to one of claims 1 and 2, characterized in that the discharge pipe (14) is provided with a stop solenoid valve (18) disposed above the plate (10). 4. - Dispositif suivant la revendication 3, caractérisé en ce que la plaque (10) est également traversée à joint étanche par des moyens (19, 20) de commande de l'électrovanne (18).4. - Device according to claim 3, characterized in that the plate (10) is also crossed with a seal by means (19, 20) for controlling the solenoid valve (18). 5. - Dispositif suivant la revendication 4, caractérisé en ce que la conduite d'évacuation (14) est pourvue, au niveau de la plaque (10) et au-dessous de l'électrovanne, d'un insert (17) percé d'un orifice calibré de diamètre très inférieur à celui de cette conduite.5. - Device according to claim 4, characterized in that the discharge pipe (14) is provided, at the level of the plate (10) and below the solenoid valve, with an insert (17) pierced with '' a calibrated orifice with a diameter much smaller than that of this pipe. 6. - Dispositif suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que la plaque (10) est également traversée à joint étanche par un dispositif (21, 22) de mesure de niveau.6. - Device according to any one of claims 1 to 5, characterized in that the plate (10) is also crossed with a seal by a device (21, 22) for level measurement. 7. - Dispositif suivant la revendication 6, caractérisé en ce que le dispositif (21, 22) de mesure de niveau comprend un tube (21) qui se termine dans le réservoir intérieur (1) par une cloche (22) ouverte vers le bas et dont l'extrémité extérieure est destinée à être reliée à un manomètre.7. - Device according to claim 6, characterized in that the device (21, 22) for level measurement comprises a tube (21) which ends in the internal tank (1) by a bell (22) open downwards and the outer end of which is intended to be connected to a pressure gauge. 8. - Dispositif suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que l'espace libre du col (3) est empli d'un matériau thermiquement isolant (34).8. - Device according to any one of claims 1 to 7, characterized in that the free space of the neck (3) is filled with a thermally insulating material (34). 9. - Dispositif suivant l'une quelconque des revendications 1 à 8, caractérisé en ce qu'une bague (23) pourvue de moyens d'accrochage (24) est fixée sur l'extrémité supérieure de l'enveloppe extérieure (2).9. - Device according to any one of claims 1 to 8, characterized in that a ring (23) provided with hooking means (24) is fixed on the upper end of the outer casing (2). 10. - Dispositif suivant l'une quelconque des revendications 1 à 9, caractérisé en ce qu'une virole (26) pourvue d'une poignée de manutention (27) est fixée sur l'extrémité inférieure de l'enveloppe extérieure (2).10. - Device according to any one of claims 1 to 9, characterized in that a ferrule (26) provided with a handling handle (27) is fixed on the lower end of the outer casing (2) . 11. - Dispositif suivant l'une quelconque des revendications 1 à 10, caractérisé en ce que l'ensemble des organes (12, 20, 21) servant à l'alimentation en liquide cryogénique et éventuellement à l'alimentation électrique et/ou à la mesure de niveau sont reliés à une boîte de connexion (29) portée par le récipient.11. - Device according to any one of claims 1 to 10, characterized in that all of the members (12, 20, 21) serving for the supply of cryogenic liquid and optionally for the electrical supply and / or the level measurement are connected to a connection box (29) carried by the container. 12. - Dispositif suivant l'une quelconque des revendications 1 à 11, caractérisé en ce que l'extrémité extérieure de la conduite d'évent (11) est conformée en un tunnel (11A) destiné à créer une atmosphère déterminée sur des objets qui défilent sous le dispositif de distribution.12. - Device according to any one of claims 1 to 11, characterized in that the outer end of the vent pipe (11) is formed into a tunnel (11A) intended to create a determined atmosphere on objects which scroll under the dispensing device. 13. - Dispositif suivant l'une quelconque des revendications 1 à 12, caractérisé en ce que l'extrémité intérieure de la conduite d'évent (11) est équipée d'une cage à flotteur, la conduite d'amenée (12) étant, en cours d'utilisation, directement reliée à un stockage de liquide cryogénique sous pression.13. - Device according to any one of claims 1 to 12, characterized in that the inner end of the vent pipe (11) is equipped with a float cage, the supply pipe (12) being , in use, directly connected to a storage of pressurized cryogenic liquid.
EP19850402161 1984-11-13 1985-11-08 Device for the distribution of a cryogenic liquid Expired EP0183594B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85402161T ATE31689T1 (en) 1984-11-13 1985-11-08 DEVICE FOR THE DISTRIBUTION OF A CRYOGENIC LIQUID.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8417237A FR2573177B1 (en) 1984-11-13 1984-11-13 DEVICE FOR DISPENSING A CRYOGENIC LIQUID
FR8417237 1984-11-13

Publications (2)

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EP0183594A1 true EP0183594A1 (en) 1986-06-04
EP0183594B1 EP0183594B1 (en) 1988-01-07

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EP19850402161 Expired EP0183594B1 (en) 1984-11-13 1985-11-08 Device for the distribution of a cryogenic liquid

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US (1) US4612773A (en)
EP (1) EP0183594B1 (en)
JP (1) JPH0610011B2 (en)
AT (1) ATE31689T1 (en)
AU (1) AU570903B2 (en)
CA (1) CA1265041A (en)
DE (1) DE3561303D1 (en)
DK (1) DK161035C (en)
ES (1) ES8701349A1 (en)
FR (1) FR2573177B1 (en)
NZ (1) NZ214113A (en)
PT (1) PT81467B (en)
ZA (1) ZA858506B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215446A (en) * 1988-02-29 1989-09-20 Air Prod & Chem Dispenser for dispensing cryogenic liquid

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4865088A (en) * 1986-09-29 1989-09-12 Vacuum Barrier Corporation Controller cryogenic liquid delivery
US4715187A (en) * 1986-09-29 1987-12-29 Vacuum Barrier Corporation Controlled cryogenic liquid delivery
US6182715B1 (en) 2000-01-18 2001-02-06 Alex R. Ziegler Liquid nitrogen injection system with flexible dosing arm for pressurization and inerting containers on production lines
CN112610880B (en) * 2020-12-01 2022-09-23 廊坊黎明气体有限公司 Liquid nitrogen storage dumping device

Citations (2)

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FR2496837A1 (en) * 1980-12-18 1982-06-25 Reynolds Metals Co APPARATUS FOR PRESSURIZING CONTAINERS CONTAINING NON-CARBONATE LIQUID PRODUCTS
EP0109134A1 (en) * 1982-11-15 1984-05-23 Crown Cork & Seal Company, Inc. Improved nitrogen injector system

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US2502588A (en) * 1945-04-11 1950-04-04 Linde Air Prod Co Portable apparatus for holding and vaporizing liquefied gases
DE1245998B (en) * 1963-09-06 1967-08-03 Arthur D. Little, Inc., Cambridge, Mass. (V. St. A.) Device for liquefying gases such as helium

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Publication number Priority date Publication date Assignee Title
FR2496837A1 (en) * 1980-12-18 1982-06-25 Reynolds Metals Co APPARATUS FOR PRESSURIZING CONTAINERS CONTAINING NON-CARBONATE LIQUID PRODUCTS
EP0109134A1 (en) * 1982-11-15 1984-05-23 Crown Cork & Seal Company, Inc. Improved nitrogen injector system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215446A (en) * 1988-02-29 1989-09-20 Air Prod & Chem Dispenser for dispensing cryogenic liquid
GB2251296A (en) * 1988-02-29 1992-07-01 Air Prod & Chem Dispenser for dispensing cryogenic liquid
GB2215446B (en) * 1988-02-29 1992-09-30 Air Prod & Chem Dispenser for dispensing cryogenic fluid
GB2251296B (en) * 1988-02-29 1992-09-30 Air Prod & Chem Dispenser for dispensing cryogenic liquid

Also Published As

Publication number Publication date
ES548784A0 (en) 1986-11-16
US4612773A (en) 1986-09-23
CA1265041A (en) 1990-01-30
PT81467A (en) 1985-12-01
EP0183594B1 (en) 1988-01-07
ZA858506B (en) 1986-06-25
AU4947585A (en) 1986-05-22
NZ214113A (en) 1987-03-31
FR2573177B1 (en) 1988-02-26
AU570903B2 (en) 1988-03-24
JPH0610011B2 (en) 1994-02-09
DK161035B (en) 1991-05-21
DK522285D0 (en) 1985-11-13
ES8701349A1 (en) 1986-11-16
ATE31689T1 (en) 1988-01-15
JPS61115819A (en) 1986-06-03
DK161035C (en) 1991-10-28
FR2573177A1 (en) 1986-05-16
DE3561303D1 (en) 1988-02-11
DK522285A (en) 1986-05-14
PT81467B (en) 1987-09-30

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