EP0893348A1 - Cryogenic liquid transfer line, equipped with a filling head for this liquid - Google Patents

Cryogenic liquid transfer line, equipped with a filling head for this liquid Download PDF

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Publication number
EP0893348A1
EP0893348A1 EP98401478A EP98401478A EP0893348A1 EP 0893348 A1 EP0893348 A1 EP 0893348A1 EP 98401478 A EP98401478 A EP 98401478A EP 98401478 A EP98401478 A EP 98401478A EP 0893348 A1 EP0893348 A1 EP 0893348A1
Authority
EP
European Patent Office
Prior art keywords
liquid
head
nozzle
transfer line
cryogenic
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.)
Ceased
Application number
EP98401478A
Other languages
German (de)
French (fr)
Inventor
Jean-Pierre Germain
Jean-Marie Disdier
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.)
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
Publication of EP0893348A1 publication Critical patent/EP0893348A1/en
Ceased 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
    • 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
    • F17C2201/0123—Shape cylindrical with variable thickness or diameter
    • 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
    • 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 head supply of a cryogenic liquid intended to be mounted on the end of a powered transfer line by a source of said liquid, said line comprising a downstream outlet for said liquid.
  • Such transfer lines find their application in various fields of technology, in particular food or pharmaceutical, where it is necessary to deliver doses of cryogenic liquid, at a higher or lower rate, and continuously or discontinuous.
  • cryogenic liquid is particularly difficult to reach. Indeed, the containers scroll on a conveyor, most often at a very high rate high and sometimes variable, reaching up to several dozen containers per second.
  • the invention relates to the production of a supply head cryogenic liquid, easily adaptable to a transfer line of said liquid, which responds to food hygiene requirements and is likely to deliver a constant, frank and constant flow of cryogenic liquid straight.
  • the invention also relates to a line of transfer of cryogenic fluid, supplied by a source of said cryogenic liquid, of the type comprising a conduit central passage of said liquid, and an envelope exterior, characterized in that it is equipped with a head as defined above.
  • the invention finally relates to an installation for supplying cryogenic liquid, of the type comprising a source of said liquid and at least one line of transfer of this liquid, characterized in that the line of transfer conforms to the definition above.
  • FIG. 1 shows an installation 2 of supply of a cryogenic liquid, in this case liquid nitrogen.
  • This installation includes a tank 4 temporary storage, arranged on a frame 6.
  • the liquid nitrogen supply to reservoir 4 is provided by a source not shown, and controlled by control means 8 known as such.
  • the storage tank includes, in its part upper, a valve 10 allowing it to communicate with the outside, so that he reigns within this tank a pressure slightly higher than the atmospheric pressure.
  • the reservoir 4 is extended, at its end lower, by a transfer line 12 on which is adapted a supply head 14 conforming to the invention, by means of a clamp 16.
  • the installation allows to deliver a quantity predetermined liquid nitrogen inside boxes of canned cylinders 18 running on a conveyor 20 in the direction of arrow F.
  • These containers contain for example fruit juice, and scroll at a speed several tens per second.
  • Liquid nitrogen is delivered in the form of a continuous vertical jet.
  • a lid higher 22 is reported on the latter by means of any suitable process, such as welding or crimping.
  • the liquid nitrogen thus delivered therefore allows made of its vaporization, on the one hand to stiffen the container to avoid deformation, and other part of extending product shelf life food, by inerting.
  • FIGS 2 and 3 show the line of transfer 12 equipped with its terminal head 14 supply.
  • This line 12 is of a type known per se, and includes a central duct 24 made of stainless steel in which circulates the liquid, and a sheath formed by a insulating lining 26 surrounding said conduit, thus that a peripheral casing 28 also made of steel stainless.
  • the inter-wall space of line 12 is under empty and is limited, downstream, by a shutter 29.
  • the casing 28 is provided at its end downstream, considering the direction of flow of the liquid, an external flange 30 projecting radially outwards, intended to receive the hose clamp 16 as will be described by the after.
  • the collar 30 comprises, at its periphery interior, a recess 32 for receiving a ring adapter 33, as will also be described by the after.
  • the conduit 24 extends beyond the shutter 29. It is extended by a steel end fitting 34 stainless steel with a central bore 36 for passage of the liquid.
  • This end piece 34 has a curved outer profile defined in particular by a hemispherical portion 38, extending from the periphery of the downstream port 39 of bore 36.
  • This orifice 39 defines the downstream orifice of line 12.
  • the supply head 14 includes a nozzle liquid discharge center 40, made in Teflon. Its outer periphery is substantially cylindrical, and has a peripheral shoulder upper 42, projecting outwards.
  • a through opening for the passage of liquid is formed in the nozzle 40.
  • This opening is constituted by a central channel 44 of circular section extended at the top by a funnel frustoconical 45 flaring towards the top of the nozzle.
  • the downstream orifice 47 of the central channel 44 defines the orifice downstream of the supply head.
  • the nozzle 40 takes a tight linear support, by its frustoconical wall 45, against the spherical surface of the end piece 34 of the conduit 24 of the line of transfer 12. In this way, the transfer zone 48 of the liquid between line 12 and the nozzle, located immediately downstream of the downstream orifice 39 of the end piece, is well insulated mechanically and thermally.
  • the nozzle 40 is surrounded by a steel frame stainless formed by a base or bottom plate 56 of substantially circular exterior profile, and of a cylindrical peripheral envelope 58 fixed on the base by welding at the outer periphery of the latter.
  • the base 56 includes a central zone 62 in extra thickness in which an opening is provided circular for passage with little clearance from the nozzle 40.
  • the envelope 58 has, at its upper part, a flange 64 projecting outwards, and provided with an internal recess 66.
  • This flange 64 and this recess 66 are intended to cooperate with the flange 30 and the corresponding offset 32 of the envelope 28 of the transfer line 12, like this will be described later.
  • a layer 68 of insulating glass foam is disposed against the inner periphery of the casing 58 of the chassis, and rests on the base 56.
  • One piece cover 70 in stainless steel covers the top and the interior of this insulating layer 68.
  • This part covering 70 includes a base 72 welded to the extra thickness 62 of the base 56, a circular wall 74 extending along the inner periphery of the layer insulating 68, and an upper edge 76 welded on the inner periphery of the envelope 58.
  • a passage opening with a small clearance of the central member 40 is further provided in the base 72 of this covering part 70.
  • An intermediate crown 78 in Teflon is disposed in a lower counterbore of the base 56, and surrounds the lower part of the nozzle 40.
  • This crown 78 makes it possible to reduce the surface heat exchange between the stainless steel base 56 and the Teflon nozzle 40, so as to limit the supply of heat to the cryogenic liquid flowing in the channel 44 of the central organ.
  • stainless steel guide sleeve is supported on the upper face of the base 70 of the covering part, and surrounds the nozzle 40 on a part substantial height of it.
  • This scabbard 80 has, at its lower part, a protruding rim 82 outwards to which the end is welded bottom of a bellows 84 made of stainless steel, formed by a thin and large sheet length, folded over several times. The upper end of this bellows is welded to the rim 54 of the peripheral flange 52 of the member central 40.
  • This bellows 84 therefore constitutes a means of return elastic allowing the portion to be pressed in service upper frustoconical 45 of the nozzle 40, against the nozzle terminal 34 of conduit 24 of transfer line 12, in order to avoid any heat supply towards the flowing liquid.
  • the nozzle 40 is thus free to slide axially with respect to the chassis, which is fixed to the transfer line 12 as will be explained below, and is guided by the internal surfaces respectively of the sheath 82, of the base 72 of the part covering 70, and the extra thickness 62 of the base 56.
  • This elastic return means therefore makes it possible to get rid of any differential dilation between different components of line 12 and the head 14, which could lead to a separation of the end piece 34 relative to the nozzle 40, and therefore to a untimely spraying of the cryogenic liquid by heat supply.
  • a deflector 86 for diverting air and scraping, as well as a jet protection cup 88 liquid nitrogen, are also reported on the face lower of base 56.
  • the deflector 86 made of stainless steel, consists of a base plate 90 having, in view from above, substantially V-shaped, and widening towards downstream, referring to the direction of movement of containers 18 on the conveyor 20.
  • This base plate has a nose 92 projecting upstream by relative to the outer periphery of the envelope 58 of the head 14.
  • the deflector 86 further comprises a wall lateral 94 extending vertically downwards from of the periphery of said base plate 90. This wall side 94 protrudes downward from the downstream end of the liquid passage channel 44 cryogenic.
  • this deflector protruding at both downstream and down, allows it to divert the air current caused by high speed movement of the containers 18 on the conveyor 20. It can also assume a scraping function aimed at remove residual foam on top containers, before sealing them, which thus avoids any blockage of channel 44 of the head 12 by the foodstuffs contained in the containers 18.
  • the cup 88 made of Teflon, includes a base 96 resting against the base plate 90 of the bow, as well as a side wall 98 extending towards the bottom.
  • This side wall is of circular section and has substantially the same outside diameter as the envelope 58 of the head.
  • This side wall extends downward in projecting from the downstream end of channel 44 of passage of the cryogenic liquid, but remains behind by relative to the lower edge of the deflector 86. In this way is established, inside the volume V defined by the dish, an atmosphere saturated with nitrogen gas. This therefore prevents ambient air from approaching the end of the canal, near which a temperature prevails well below 0 °, which eliminates any risk of ice formation due to air humidity.
  • the deflector 86 and the cup 88 are respectively provided with a central free orifice passage of the central organ 40, and are fixed during of the same operation against the base 56 of the chassis of the head, for example by means of screws 99.
  • the adapter ring 33 in Teflon in the shape of a crown, is placed between the downstream end of the transfer line 12, and the upstream end of the supply head 14.
  • This ring has a T-shaped cross section, of which the core 102 is turned radially outward, and is center, by its two wings 104, in the recesses respective 32, 66 with which the flanges 30 are provided, 64 opposite line 12 and head 14.
  • Soul 102 is sandwiched between the facing planes of the two flanges.
  • An EPDM O-ring 106 is also disposed at the outer periphery of the adapter ring 33, and is therefore crushed between the flanges respectively 30, 64 of line 12 and of head 14.
  • the clamp 16 of section substantially C-shaped and formed stainless steel, also encloses by the face interior of each of its wings 108, the flanges 30 and 64.
  • the invention achieves the objectives previously mentioned.
  • the supply head conforms to the invention is easily adaptable on the line of transfer, since their mutual bond makes only intervene easily removable elements.
  • the user can drill channel 44 himself desired diameter.
  • the supply head according to the invention meets food hygiene requirements, since it only uses materials such as steel stainless and Teflon, which are compatible with peracetic acid used for cleaning the installation.
  • the path that nitrogen travels liquid in the head has no recesses likely to induce possible water retention or any other product.
  • the head according to the invention makes it possible to minimize heat input to the liquid cryogenic.
  • the connection between the transfer line and the supply head is indeed only consisting of elements reported in the vicinity of outer envelopes of the line and head.
  • junction area between the paths of passage of the liquid respectively inside the line and head is well thermally insulated, everything first because of the use of a central nozzle in insulating material, then through the use of a elastic return means making it possible to press, in service, the upstream end of the central passage nozzle liquid against the end of the line transfer, and finally due to the profiles of the nozzle and the nozzle.

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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)

Abstract

A cryogenic liquid is supplied to its point of use via an insulated pipe (12) attached (16) to a supply head (14). Liquid passes through a central nozzle (40) which has a central vertical tubular duct (44) opening to a cone (48) at the top. This nozzle can slide up and down in an external casing (56 and 58) and is drawn upwards by an elastic link (84).

Description

La présente invention concerne une tête de fourniture d'un liquide cryogénique destinée à être montée sur l'extrémité d'une ligne de transfert alimentée par une source dudit liquide, ladite ligne comportant un orifice aval de sortie dudit liquide.The present invention relates to a head supply of a cryogenic liquid intended to be mounted on the end of a powered transfer line by a source of said liquid, said line comprising a downstream outlet for said liquid.

De telles lignes de transfert trouvent leur application dans divers domaines de la technique, en particulier alimentaire ou pharmaceutique, où il est nécessaire de délivrer des doses de liquide cryogénique, à cadence plus ou moins élevée, et de manière continue ou discontinue.Such transfer lines find their application in various fields of technology, in particular food or pharmaceutical, where it is necessary to deliver doses of cryogenic liquid, at a higher or lower rate, and continuously or discontinuous.

Ces lignes sont notamment utilisées en vue de délivrer de l'azote liquide dans des récipients contenant des denrées alimentaires, juste avant obturation de ces derniers. Cette opération vise d'une part à pressuriser et donc à rigidifier le récipient, en tirant parti de la vaporisation de l'azote qui induit un gonflement du récipient. Cette opération permet en outre d'inerter les denrées alimentaires par abaissement de la teneur résiduelle en oxygène, et donc d'en prolonger la durée de conservation.These lines are used in particular for deliver liquid nitrogen into containers containing of foodstuffs, just before filling of these last. This operation aims on the one hand to pressurize and therefore to stiffen the container, taking advantage of the vaporization of nitrogen which induces swelling of the container. This operation also makes it possible to inert the food by lowering the content residual oxygen, and therefore to extend the duration of conservation.

Cette opération de fourniture de liquide cryogénique est toutefois particulièrement délicate, et doit être réalisée avec une extrême précision. Il est en effet nécessaire que chaque récipient reçoive une dose égale et la plus précise possible de liquide, de sorte que la pression interne ne varie pas d'un récipient à l'autre. Si trop peu de liquide est délivré aux récipients, ces derniers se déformeront lors leur manipulation, et en particulier lors de leur gerbage. En revanche, s'ils reçoivent trop de liquide, ils se déformeront voire exploseront du fait de la pression interne excessive y régnant alors.This liquid supply operation cryogenic is however particularly delicate, and must be performed with extreme precision. He is in required effect that each container receives a dose equal and as precise as possible of liquid, so that the internal pressure does not vary from container to the other. If too little liquid is delivered to containers, these will deform when handling, and in particular during stacking. In however, if they receive too much liquid, they will distort or even explode due to pressure excessive internal reign there.

La précision requise pour cette opération de fourniture de liquide cryogénique est particulièrement difficile à atteindre. En effet, les récipients défilent sur un convoyeur, le plus souvent à une cadence très élevée et parfois variable, pouvant atteindre plusieurs dizaines de récipients par seconde.The precision required for this operation supply of cryogenic liquid is particularly difficult to reach. Indeed, the containers scroll on a conveyor, most often at a very high rate high and sometimes variable, reaching up to several dozen containers per second.

Une difficulté supplémentaire de cette opération réside dans la vaporisation partielle du liquide cryogénique déversé, de sorte que ce dernier ne s'écoule pas en un jet vertical et continu, comme cela serait souhaitable. En outre, cette vaporisation peut entraíner la formation de bouchons gazeux provoquant une rétention du liquide cryogénique, et ainsi un écoulement discontinu de ce dernier.An additional difficulty of this operation lies in the partial vaporization of the liquid cryogenic spilled, so that it does not flow not in a vertical and continuous stream, as it would be desirable. In addition, this vaporization can cause the formation of gas plugs causing retention cryogenic liquid, and thus a discontinuous flow of the last.

Afin de pallier ces différents inconvénients, l'invention vise la réalisation d'une tête de fourniture de liquide cryogénique, facilement adaptable sur une ligne de transfert dudit liquide, qui réponde aux exigences d'hygiène alimentaire et soit susceptible de délivrer un jet de liquide cryogénique franc, constant et rectiligne.In order to overcome these various drawbacks, the invention relates to the production of a supply head cryogenic liquid, easily adaptable to a transfer line of said liquid, which responds to food hygiene requirements and is likely to deliver a constant, frank and constant flow of cryogenic liquid straight.

A cet effet, l'invention a pour objet une tête de fourniture de liquide cryogénique du type précité, caractérisée en ce que qu'elle comprend :

  • une buse centrale isolante dans laquelle est ménagée une ouverture traversante de passage du liquide;
  • un châssis extérieur entourant la buse centrale et dans lequel cette dernière est susceptible de coulisser;
  • des moyens de solidarisation du châssis et de la ligne de transfert; et
  • des moyens de rappel élastique qui, en service, appliquent l'extrémité amont de l'ouverture traversante de la buse contre la périphérie de l'orifice aval de la ligne de transfert.
To this end, the subject of the invention is a head for supplying cryogenic liquid of the aforementioned type, characterized in that it comprises:
  • an insulating central nozzle in which is formed a through opening for the passage of the liquid;
  • an outer frame surrounding the central nozzle and in which the latter is capable of sliding;
  • means for securing the chassis and the transfer line; and
  • elastic return means which, in service, apply the upstream end of the through opening of the nozzle against the periphery of the downstream orifice of the transfer line.

La tête de fourniture conforme à l'invention peut comporter une ou plusieurs des caractéristiques suivantes :

  • l'extrémité amont de ladite ouverture traversante a une forme d'entonnoir, et la tête comprend en outre un embout sphérique définissant ledit orifice aval;
  • lesdits moyens de rappel élastique sont constitués par un soufflet formé par une feuille métallique de faible épaisseur et de grande longueur repliée plusieurs fois sur elle-même, dont une première extrémité est fixée sur un élément solidaire de la buse centrale, et dont une seconde extrémité est fixée sur un élément solidaire du châssis;
  • une couche isolante est disposée entre la périphérie intérieure de l'enveloppe du châssis, et la périphérie extérieure de la buse;
  • une couronne isolante entourant la buse est logée dans une embase inférieure du châssis qui guide l'extrémité inférieure de la buse;
  • la tête étant destinée à délivrer du liquide cryogénique à des récipients défilant sur un convoyeur, elle comprend une coupelle de protection du jet de liquide, dont la paroi latérale entoure la sortie de la buse et s'étend en aval de cette sortie, dans le sens d'écoulement du liquide;
  • la tête comprend un déflecteur de détournement d'air et de raclage présentant une extrémité située en amont de la périphérie extérieure de ladite tête, dans le sens de défilement desdits récipients, et dont la paroi latérale s'étend en aval de l'orifice aval de la tête, dans le sens d'écoulement du liquide.
The supply head according to the invention may include one or more of the following characteristics:
  • the upstream end of said through opening has a funnel shape, and the head further comprises a spherical end defining said downstream orifice;
  • said elastic return means consist of a bellows formed by a metal sheet of small thickness and of great length folded several times on itself, of which a first end is fixed to an element integral with the central nozzle, and of which a second end is fixed to an element integral with the chassis;
  • an insulating layer is arranged between the inner periphery of the casing of the chassis, and the outer periphery of the nozzle;
  • an insulating ring surrounding the nozzle is housed in a lower base of the chassis which guides the lower end of the nozzle;
  • the head being intended to deliver cryogenic liquid to containers running on a conveyor, it comprises a cup for protecting the jet of liquid, the side wall of which surrounds the outlet of the nozzle and extends downstream of this outlet, in the direction of liquid flow;
  • the head comprises an air deflection and scraping deflector having an end situated upstream from the external periphery of said head, in the direction of travel of said containers, and the side wall of which extends downstream from the downstream orifice from the head, in the direction of liquid flow.

L'invention a également pour objet une ligne de transfert de fluide cryogénique, alimentée par une source dudit liquide cryogénique, du type comprenant un conduit central de passage dudit liquide, et une enveloppe extérieure, caractérisée en ce qu'elle est équipée d'une tête telle que définie ci-dessus. The invention also relates to a line of transfer of cryogenic fluid, supplied by a source of said cryogenic liquid, of the type comprising a conduit central passage of said liquid, and an envelope exterior, characterized in that it is equipped with a head as defined above.

La ligne de transfert conforme à l'invention peut comporter une ou plusieurs des caractéristiques suivantes :

  • ladite enveloppe extérieure et ledit châssis comprennent des collerettes en regard, en saillie vers l'extérieur, sur lesquelles est disposé un collier de serrage en vue de la fixation de ladite tête sur ladite ligne;
  • un anneau adaptateur et un joint torique sont disposés entre lesdites collerettes.
The transfer line according to the invention may include one or more of the following characteristics:
  • said outer casing and said chassis comprise facing collars, projecting outwards, on which is disposed a clamp for fixing said head on said line;
  • an adapter ring and an O-ring are arranged between said flanges.

L'invention a enfin pour objet une installation de fourniture de liquide cryogénique, du type comprenant une source dudit liquide et au moins une ligne de transfert de ce liquide, caractérisée en ce que la ligne de transfert est conforme à la définition ci-dessus.The invention finally relates to an installation for supplying cryogenic liquid, of the type comprising a source of said liquid and at least one line of transfer of this liquid, characterized in that the line of transfer conforms to the definition above.

L'invention va être décrite ci-dessous, en référence aux dessins annexés donnés uniquement à titre d'exemple, et dans lesquels :

  • la Figure 1 est une vue en perspective d'une installation de fourniture de fluide cryogénique comprenant une tête de fourniture conforme à l'invention;
  • la Figure 2 est une vue de dessus d'une ligne de transfert de liquide cryogénique équipée d'une tête de fourniture conforme à l'invention;
  • la Figure 3 est une vue en coupe suivant la ligne III-III de la Figure 2.
The invention will be described below, with reference to the accompanying drawings given solely by way of example, and in which:
  • Figure 1 is a perspective view of a cryogenic fluid supply installation comprising a supply head according to the invention;
  • Figure 2 is a top view of a cryogenic liquid transfer line equipped with a supply head according to the invention;
  • Figure 3 is a sectional view along line III-III of Figure 2.

La Figure 1 représente une installation 2 de fourniture d'un liquide cryogénique, en l'occurrence de l'azote liquide. Cette installation comprend un réservoir 4 de stockage provisoire, disposé sur un châssis 6. L'alimentation en azote liquide du réservoir 4 est assurée par une source non représentée, et commandée par des moyens de commande 8 connus en tant que tels.Figure 1 shows an installation 2 of supply of a cryogenic liquid, in this case liquid nitrogen. This installation includes a tank 4 temporary storage, arranged on a frame 6. The liquid nitrogen supply to reservoir 4 is provided by a source not shown, and controlled by control means 8 known as such.

Le réservoir de stockage comprend, à sa partie supérieure, une soupape 10 lui permettant de communiquer avec l'extérieur, de sorte qu'il règne au sein de ce réservoir une pression légèrement supérieure à la pression atmosphérique.The storage tank includes, in its part upper, a valve 10 allowing it to communicate with the outside, so that he reigns within this tank a pressure slightly higher than the atmospheric pressure.

Le réservoir 4 est prolongé, à son extrémité inférieure, par une ligne de transfert 12 sur laquelle est adaptée une tête de fourniture 14 conforme à l'invention, au moyen d'un collier de serrage 16. Ces trois derniers éléments seront explicités en regard des Figures 2 et 3.The reservoir 4 is extended, at its end lower, by a transfer line 12 on which is adapted a supply head 14 conforming to the invention, by means of a clamp 16. These the last three elements will be explained with regard to Figures 2 and 3.

L'installation permet de délivrer une quantité prédéterminée d'azote liquide à l'intérieur de boítes de conserve cylindriques 18 défilant sur un convoyeur 20 dans le sens de la flèche F. Ces récipients contiennent par exemple du jus de fruits, et défilent à une vitesse de plusieurs dizaines par seconde. L'azote liquide est délivré sous la forme d'un jet vertical continu.The installation allows to deliver a quantity predetermined liquid nitrogen inside boxes of canned cylinders 18 running on a conveyor 20 in the direction of arrow F. These containers contain for example fruit juice, and scroll at a speed several tens per second. Liquid nitrogen is delivered in the form of a continuous vertical jet.

Après fourniture de la dose désirée d'azote liquide à l'intérieur du récipient, un couvercle supérieur 22 est rapporté sur ce dernier au moyen de tout procédé approprié, comme par exemple soudure ou sertissage.After supplying the desired dose of nitrogen liquid inside the container, a lid higher 22 is reported on the latter by means of any suitable process, such as welding or crimping.

L'azote liquide ainsi délivré permet donc, du fait de sa vaporisation, d'une part de rigidifier le récipient afin d'éviter toute déformation, et d'autre part de prolonger la durée de conservation du produit alimentaire, par inertage.The liquid nitrogen thus delivered therefore allows made of its vaporization, on the one hand to stiffen the container to avoid deformation, and other part of extending product shelf life food, by inerting.

Les Figures 2 et 3 représentent la ligne de transfert 12 équipée de sa tête 14 terminale de fourniture.Figures 2 and 3 show the line of transfer 12 equipped with its terminal head 14 supply.

Cette ligne 12 est d'un type connu en soi, et comprend un conduit central 24 en acier inoxydable dans lequel circule le liquide, et une gaine formée par une garniture isolante 26 entourant ledit conduit, ainsi qu'une enveloppe périphérique 28 également en acier inoxydable. L'espace d'interparoi de la ligne 12 est sous vide et est limité, en aval, par un obturateur 29. This line 12 is of a type known per se, and includes a central duct 24 made of stainless steel in which circulates the liquid, and a sheath formed by a insulating lining 26 surrounding said conduit, thus that a peripheral casing 28 also made of steel stainless. The inter-wall space of line 12 is under empty and is limited, downstream, by a shutter 29.

L'enveloppe 28 est pourvue, à son extrémité aval, en considérant le sens d'écoulement du liquide, d'une collerette extérieure 30 faisant saillie radialement vers l'extérieur, destinée à recevoir le collier de serrage 16 comme cela sera décrit par la suite.The casing 28 is provided at its end downstream, considering the direction of flow of the liquid, an external flange 30 projecting radially outwards, intended to receive the hose clamp 16 as will be described by the after.

La collerette 30 comprend, à sa périphérie intérieure, un décrochement 32 de réception d'un anneau adaptateur 33, comme cela sera également décrit par la suite.The collar 30 comprises, at its periphery interior, a recess 32 for receiving a ring adapter 33, as will also be described by the after.

Le conduit 24 s'étend au-delà de l'obturateur 29. Il est prolongé par un embout terminal 34 en acier inoxydable percé d'un alésage central 36 de passage du liquide. Cet embout 34 présente un profil extérieur bombé défini en particulier par une portion 38 hémisphérique, s'étendant à partir de la périphérie de l'orifice aval 39 de l'alésage 36. Cet orifice 39 définit l'orifice aval de la ligne 12.The conduit 24 extends beyond the shutter 29. It is extended by a steel end fitting 34 stainless steel with a central bore 36 for passage of the liquid. This end piece 34 has a curved outer profile defined in particular by a hemispherical portion 38, extending from the periphery of the downstream port 39 of bore 36. This orifice 39 defines the downstream orifice of line 12.

La tête de fourniture 14 comprend une buse centrale 40 de déversement de liquide, réalisée en Téflon. Sa périphérie extérieure est sensiblement cylindrique, et présente un épaulement périphérique supérieur 42, en saillie vers l'extérieur.The supply head 14 includes a nozzle liquid discharge center 40, made in Teflon. Its outer periphery is substantially cylindrical, and has a peripheral shoulder upper 42, projecting outwards.

Une ouverture traversante de passage du liquide est ménagée dans la buse 40. Cette ouverture est constituée par un canal central 44 de section circulaire prolongé à sa partie supérieure par un entonnoir tronconique 45 s'évasant vers le sommet de la buse. L'orifice aval 47 du canal central 44 définit l'orifice aval de la tête de fourniture.A through opening for the passage of liquid is formed in the nozzle 40. This opening is constituted by a central channel 44 of circular section extended at the top by a funnel frustoconical 45 flaring towards the top of the nozzle. The downstream orifice 47 of the central channel 44 defines the orifice downstream of the supply head.

La buse 40 prend un appui linéaire étanche, par sa paroi tronconique 45, contre la surface sphérique de l'embout terminal 34 du conduit 24 de la ligne de transfert 12. De la sorte, la zone de transfert 48 du liquide entre la ligne 12 et la buse, située immédiatement en aval de l'orifice aval 39 de l'embout, est bien isolée mécaniquement et thermiquement.The nozzle 40 takes a tight linear support, by its frustoconical wall 45, against the spherical surface of the end piece 34 of the conduit 24 of the line of transfer 12. In this way, the transfer zone 48 of the liquid between line 12 and the nozzle, located immediately downstream of the downstream orifice 39 of the end piece, is well insulated mechanically and thermally.

L'épaulement périphérique 42 de l'organe central supporte une collerette 52 périphérique de profil correspondant qui comporte, à sa partie inférieure, un rebord 54 de réception d'un soufflet, comme cela sera décrit par la suite.The peripheral shoulder 42 of the central organ supports 52 peripheral profile flange correspondent who has, at its bottom, a flange 54 for receiving a bellows, as will be described later.

La buse 40 est entourée d'un châssis en acier inoxydable constitué par une embase ou plaque inférieure 56 de profil extérieur sensiblement circulaire, et d'une enveloppe périphérique cylindrique 58 fixée sur l'embase par soudure au niveau de la périphérie extérieure de cette dernière.The nozzle 40 is surrounded by a steel frame stainless formed by a base or bottom plate 56 of substantially circular exterior profile, and of a cylindrical peripheral envelope 58 fixed on the base by welding at the outer periphery of the latter.

L'embase 56 comprend une zone centrale 62 en surépaisseur dans laquelle est ménagée une ouverture circulaire pour le passage avec un faible jeu de la buse 40.The base 56 includes a central zone 62 in extra thickness in which an opening is provided circular for passage with little clearance from the nozzle 40.

L'enveloppe 58 présente, à sa partie supérieure, une collerette 64 faisant saillie vers l'extérieur, et pourvue d'un décrochement intérieur 66. Cette collerette 64 et ce décrochement 66 sont destinés à coopérer avec la collerette 30 et le décrochement 32 correspondants de l'enveloppe 28 de la ligne de transfert 12, comme cela sera décrit par la suite.The envelope 58 has, at its upper part, a flange 64 projecting outwards, and provided with an internal recess 66. This flange 64 and this recess 66 are intended to cooperate with the flange 30 and the corresponding offset 32 of the envelope 28 of the transfer line 12, like this will be described later.

Une couche 68 de mousse de verre isolante est disposée contre la périphérie interne de l'enveloppe 58 du châssis, et prend appui sur l'embase 56. Une pièce d'habillage 70 en acier inoxydable recouvre le sommet et l'intérieur de cette couche isolante 68. Cette pièce d'habillage 70 comprend un socle 72 soudé sur la surépaisseur 62 de l'embase 56, une paroi circulaire 74 s'étendant le long de la périphérie interne de la couche isolante 68, et un rebord supérieur 76 soudé sur la périphérie intérieure de l'enveloppe 58. A layer 68 of insulating glass foam is disposed against the inner periphery of the casing 58 of the chassis, and rests on the base 56. One piece cover 70 in stainless steel covers the top and the interior of this insulating layer 68. This part covering 70 includes a base 72 welded to the extra thickness 62 of the base 56, a circular wall 74 extending along the inner periphery of the layer insulating 68, and an upper edge 76 welded on the inner periphery of the envelope 58.

Une ouverture de passage avec un faible jeu de l'organe central 40 est en outre ménagée dans le socle 72 de cette pièce d'habillage 70.A passage opening with a small clearance of the central member 40 is further provided in the base 72 of this covering part 70.

Une couronne intermédiaire 78 en Téflon est disposée dans un lamage inférieur de l'embase 56, et entoure avec un faible jeu la partie inférieure de la buse 40. Cette couronne 78 permet de diminuer la surface d'échange thermique entre l'embase 56 en acier inoxydable et la buse 40 en Téflon, de manière à limiter l'apport de chaleur vers le liquide cryogénique s'écoulant dans le canal 44 de l'organe central.An intermediate crown 78 in Teflon is disposed in a lower counterbore of the base 56, and surrounds the lower part of the nozzle 40. This crown 78 makes it possible to reduce the surface heat exchange between the stainless steel base 56 and the Teflon nozzle 40, so as to limit the supply of heat to the cryogenic liquid flowing in the channel 44 of the central organ.

Un fourreau 80 de guidage en acier inoxydable prend appui sur la face supérieure du socle 70 de la pièce d'habillage, et entoure la buse 40 sur une partie substantielle de la hauteur de celle-ci. Ce fourreau 80 présente, à sa partie inférieure, un rebord 82 en saillie vers l'extérieur sur lequel est soudée l'extrémité inférieure d'un soufflet 84 en acier inoxydable, formé par une feuille de faible épaisseur et de grande longueur, plusieurs fois repliée sur elle-même. L'extrémité supérieure de ce soufflet est soudée sur le rebord 54 de la collerette périphérique 52 de l'organe central 40.80 stainless steel guide sleeve is supported on the upper face of the base 70 of the covering part, and surrounds the nozzle 40 on a part substantial height of it. This scabbard 80 has, at its lower part, a protruding rim 82 outwards to which the end is welded bottom of a bellows 84 made of stainless steel, formed by a thin and large sheet length, folded over several times. The upper end of this bellows is welded to the rim 54 of the peripheral flange 52 of the member central 40.

Ce soufflet 84 constitue donc un moyen de rappel élastique permettant de plaquer, en service, la portion tronconique supérieure 45 de la buse 40, contre l'embout terminal 34 du conduit 24 de la ligne de transfert 12, afin d'éviter tout apport de chaleur en direction du liquide qui s'écoule.This bellows 84 therefore constitutes a means of return elastic allowing the portion to be pressed in service upper frustoconical 45 of the nozzle 40, against the nozzle terminal 34 of conduit 24 of transfer line 12, in order to avoid any heat supply towards the flowing liquid.

La buse 40 est ainsi libre de coulisser axialement par rapport au châssis, qui est fixé sur la ligne de transfert 12 comme cela sera expliqué ci-dessous, et se trouve guidé par les surfaces internes respectivement du fourreau 82, du socle 72 de la pièce d'habillage 70, et de la surépaisseur 62 de l'embase 56. The nozzle 40 is thus free to slide axially with respect to the chassis, which is fixed to the transfer line 12 as will be explained below, and is guided by the internal surfaces respectively of the sheath 82, of the base 72 of the part covering 70, and the extra thickness 62 of the base 56.

Ce moyen de rappel élastique permet donc de s'affranchir de toute dilatation différentielle entre les différents éléments constitutifs de la ligne 12 et de la tête 14, qui pourrait conduire à une désolidarisation de l'embout 34 par rapport à la buse 40, et donc à une vaporisation intempestive du liquide cryogénique par apport de chaleur.This elastic return means therefore makes it possible to get rid of any differential dilation between different components of line 12 and the head 14, which could lead to a separation of the end piece 34 relative to the nozzle 40, and therefore to a untimely spraying of the cryogenic liquid by heat supply.

Un déflecteur 86 de détournement d'air et de raclage, ainsi qu'une coupelle 88 de protection du jet d'azote liquide, sont en outre rapportées sur la face inférieure de l'embase 56.A deflector 86 for diverting air and scraping, as well as a jet protection cup 88 liquid nitrogen, are also reported on the face lower of base 56.

Le déflecteur 86, réalisée en acier inoxydable, est constituée d'une plaque de base 90 présentant, en vue de dessus, sensiblement une forme de V, et s'évasant vers l'aval, en faisant référence au sens de déplacement des récipients 18 sur le convoyeur 20. Cette plaque de base présente un nez 92 faisant saillie vers l'amont par rapport à la périphérie extérieure de l'enveloppe 58 de la tête 14.The deflector 86, made of stainless steel, consists of a base plate 90 having, in view from above, substantially V-shaped, and widening towards downstream, referring to the direction of movement of containers 18 on the conveyor 20. This base plate has a nose 92 projecting upstream by relative to the outer periphery of the envelope 58 of the head 14.

Le déflecteur 86 comprend en outre une paroi latérale 94 s'étendant verticalement vers le bas à partir de la périphérie de ladite plaque de base 90. Cette paroi latérale 94 fait saillie vers le bas par rapport à l'extrémité aval du canal 44 de passage du liquide cryogénique.The deflector 86 further comprises a wall lateral 94 extending vertically downwards from of the periphery of said base plate 90. This wall side 94 protrudes downward from the downstream end of the liquid passage channel 44 cryogenic.

La conformation de ce déflecteur, en saillie à la fois vers l'aval et vers le bas, lui permet de détourner le courant d'air provoqué par la grande vitesse de déplacement des récipients 18 sur le convoyeur 20. Il peut aussi assumer une fonction de raclage visant à éliminer la mousse résiduelle se trouvant sur le dessus des récipients, avant obturation de ces derniers, ce qui permet d'éviter de la sorte tout bouchage du canal 44 de la tête 12 par les denrées alimentaires contenues dans les récipients 18. The conformation of this deflector, protruding at both downstream and down, allows it to divert the air current caused by high speed movement of the containers 18 on the conveyor 20. It can also assume a scraping function aimed at remove residual foam on top containers, before sealing them, which thus avoids any blockage of channel 44 of the head 12 by the foodstuffs contained in the containers 18.

La coupelle 88, réalisée en Teflon, comprend un socle 96 reposant contre la plaque 90 de base de l'étrave, ainsi qu'une paroi latérale 98 s'étendant vers le bas. Cette paroi latérale est à section circulaire et présente sensiblement le même diamètre extérieur que l'enveloppe 58 de la tête.The cup 88, made of Teflon, includes a base 96 resting against the base plate 90 of the bow, as well as a side wall 98 extending towards the bottom. This side wall is of circular section and has substantially the same outside diameter as the envelope 58 of the head.

Cette paroi latérale s'étend, vers le bas, en saillie par rapport à l'extrémité aval du canal 44 de passage du liquide cryogénique, mais reste en retrait par rapport au bord inférieur du déflecteur 86. De la sorte s'établit, à l'intérieur du volume V défini par la coupelle, une atmosphère saturée en azote gazeux. Ceci empêche donc l'air ambiant d'approcher de l'extrémité du canal, au voisinage de laquelle règne une température bien inférieure à 0°, ce qui élimine tout risque de formation de glace due à l'humidité de l'air.This side wall extends downward in projecting from the downstream end of channel 44 of passage of the cryogenic liquid, but remains behind by relative to the lower edge of the deflector 86. In this way is established, inside the volume V defined by the dish, an atmosphere saturated with nitrogen gas. This therefore prevents ambient air from approaching the end of the canal, near which a temperature prevails well below 0 °, which eliminates any risk of ice formation due to air humidity.

Le déflecteur 86 et la coupelle 88 sont respectivement pourvues d'un orifice central de libre passage de l'organe central 40, et sont fixées au cours de la même opération contre l'embase 56 du châssis de la tête, par exemple au moyen de vis 99.The deflector 86 and the cup 88 are respectively provided with a central free orifice passage of the central organ 40, and are fixed during of the same operation against the base 56 of the chassis of the head, for example by means of screws 99.

On va maintenant décrire la jonction de la tête 14 sur la ligne de transfert 12. L'anneau adaptateur 33 en Téflon, en forme de couronne, est disposé entre l'extrémité aval de la ligne de transfert 12, et l'extrémité amont de la tête de fourniture 14. Cet anneau présente une section transversale en forme de T, dont l'âme 102 est tournée radialement vers l'extérieur, et se centre, par ses deux ailes 104, dans les décrochements respectifs 32, 66 dont sont pourvues les collerettes 30, 64 en regard de la ligne 12 et de la tête 14. L'âme 102 est prise en sandwich entre les faces planes en regard des deux collerettes.We will now describe the junction of the head 14 on the transfer line 12. The adapter ring 33 in Teflon, in the shape of a crown, is placed between the downstream end of the transfer line 12, and the upstream end of the supply head 14. This ring has a T-shaped cross section, of which the core 102 is turned radially outward, and is center, by its two wings 104, in the recesses respective 32, 66 with which the flanges 30 are provided, 64 opposite line 12 and head 14. Soul 102 is sandwiched between the facing planes of the two flanges.

Un joint torique 106 en EPDM est en outre disposé à la périphérie externe de l'anneau adaptateur 33, et se trouve donc écrasé entre les collerettes respectives 30, 64 de la ligne 12 et de la tête 14.An EPDM O-ring 106 is also disposed at the outer periphery of the adapter ring 33, and is therefore crushed between the flanges respectively 30, 64 of line 12 and of head 14.

Le collier de serrage 16, de section transversale sensiblement en forme de C et constitué d'acier inoxydable, enserre en outre, par la face intérieure de chacune de ses ailes 108, les collerettes 30 et 64.The clamp 16, of section substantially C-shaped and formed stainless steel, also encloses by the face interior of each of its wings 108, the flanges 30 and 64.

Un tel agencement permet de limiter les entrées de chaleur en direction du liquide cryogénique, puisque l'élément de serrage ne se trouve pas à proximité du conduit 24 et du canal 44 de passage dudit liquide, mais au niveau des enveloppes extérieures de la ligne 12 de la tête 14.Such an arrangement makes it possible to limit the entries heat towards the cryogenic liquid, since the clamping element is not near the conduit 24 and channel 44 for passage of said liquid, but at the level of the outer envelopes of line 12 of the head 14.

L'invention permet de réaliser les objectifs précédemment mentionnés.The invention achieves the objectives previously mentioned.

En effet, la tête de fourniture conforme à l'invention est facilement adaptable sur la ligne de transfert, puisque leur liaison mutuelle fait uniquement intervenir des éléments facilement amovibles. De plus, l'utilisateur peut percer lui-même le canal 44 au diamètre désiré.Indeed, the supply head conforms to the invention is easily adaptable on the line of transfer, since their mutual bond makes only intervene easily removable elements. Moreover, the user can drill channel 44 himself desired diameter.

La tête de fourniture conforme à l'invention répond aux exigences d'hygiène alimentaire, puisqu'elle met uniquement en oeuvre des matériaux tels que l'acier inoxydable et le Téflon, qui sont compatibles avec l'acide peracétique utilisé pour le nettoyage de l'installation. En outre, le trajet que parcourt l'azote liquide au sein de la tête ne comporte aucun recoin susceptible d'induire une éventuelle rétention d'eau ou de tout autre produit.The supply head according to the invention meets food hygiene requirements, since it only uses materials such as steel stainless and Teflon, which are compatible with peracetic acid used for cleaning the installation. In addition, the path that nitrogen travels liquid in the head has no recesses likely to induce possible water retention or any other product.

Enfin, la tête conforme à l'invention permet de minimiser les apports de chaleur en direction du liquide cryogénique. Le raccordement entre la ligne de transfert et la tête de fourniture est en effet uniquement constitué d'éléments rapportés au voisinage des enveloppes extérieures de la ligne et de la tête. Finally, the head according to the invention makes it possible to minimize heat input to the liquid cryogenic. The connection between the transfer line and the supply head is indeed only consisting of elements reported in the vicinity of outer envelopes of the line and head.

De plus, la zone de jonction entre les trajets de passage du liquide respectivement à l'intérieur de la ligne et de la tête, est bien isolée thermiquement, tout d'abord du fait de l'emploi d'une buse centrale en matériau isolant, ensuite grâce à l'utilisation d'un moyen de rappel élastique permettant de plaquer, en service, l'extrémité amont de la buse centrale de passage du liquide contre l'embout terminal de la ligne de transfert, et enfin du fait des profils de l'embout et de la buse.In addition, the junction area between the paths of passage of the liquid respectively inside the line and head, is well thermally insulated, everything first because of the use of a central nozzle in insulating material, then through the use of a elastic return means making it possible to press, in service, the upstream end of the central passage nozzle liquid against the end of the line transfer, and finally due to the profiles of the nozzle and the nozzle.

Claims (11)

Tête de fourniture (14) d'un liquide cryogénique, destinée à être montée sur l'extrémité d'une ligne de transfert (12) alimentée par une source (4) dudit liquide, ladite ligne (12) comportant un orifice aval (39) de sortie dudit liquide, caractérisée en ce qu'elle comprend : une buse centrale isolante (40) dans laquelle est ménagée une ouverture traversante (44, 45) de passage du liquide; un châssis extérieur (56, 58) entourant la buse centrale (40) et dans lequel cette dernière est susceptible de coulisser; des moyens (16) de solidarisation du châssis et de la ligne de transfert (12); et des moyens de rappel élastique (84) qui, en service, appliquent l'extrémité amont (45) de l'ouverture traversante (44, 45) de la buse contre la périphérie (38) de l'orifice aval (39) de la ligne de transfert(12). Supply head (14) for a cryogenic liquid, intended to be mounted on the end of a transfer line (12) supplied by a source (4) of said liquid, said line (12) comprising a downstream orifice (39 ) outlet of said liquid, characterized in that it comprises: an insulating central nozzle (40) in which is formed a through opening (44, 45) for passage of the liquid; an outer frame (56, 58) surrounding the central nozzle (40) and in which the latter is capable of sliding; means (16) for securing the chassis and the transfer line (12); and elastic return means (84) which, in service, apply the upstream end (45) of the through opening (44, 45) of the nozzle against the periphery (38) of the downstream orifice (39) of the transfer line (12). Tête selon la revendication 1, caractérisée en ce que l'extrémité amont (45) de ladite ouverture traversante (44, 45) a une forme d'entonnoir, et en ce que la tête comprend en outre un embout sphérique (38) définissant ledit orifice aval (39).Head according to claim 1, characterized in that the upstream end (45) of said opening through (44, 45) has a funnel shape, and in this that the head further comprises a spherical tip (38) defining said downstream orifice (39). Tête selon la revendication 2, caractérisée en ce que lesdits moyens de rappel élastique sont constitués par un soufflet (84) formé par une feuille métallique de faible épaisseur et de grande longueur repliée plusieurs fois sur elle-même, dont une première extrémité est fixée sur un élément (52) solidaire de la buse centrale (40), et dont une seconde extrémité est fixée sur un élément (80) solidaire du châssis (56, 58).Head according to claim 2, characterized in that said elastic return means are formed by a bellows (84) formed by a sheet metallic thin and long folded over several times, including a first end is fixed to an element (52) integral with the central nozzle (40), and a second end of which is fixed to an element (80) integral with the chassis (56, 58). Tête selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'une couche isolante (66) est disposée entre la périphérie intérieure de l'enveloppe (58) du châssis, et la périphérie extérieure de la buse (40).Head according to any one of the claims 1 to 3, characterized in that an insulating layer (66) is disposed between the inner periphery of the envelope (58) of the chassis, and the outer periphery of the nozzle (40). Tête selon l'une quelconque des revendications 1 à 4, caractérisée en ce qu'une couronne isolante (78) entourant la buse (40) est logée dans une embase inférieure (56) du châssis (56, 58) qui guide l'extrémité inférieure de la buse.Head according to any one of Claims 1 to 4, characterized in that a crown insulator (78) surrounding the nozzle (40) is housed in a lower base (56) of the chassis (56, 58) which guides the lower end of the nozzle. Tête selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'elle comprend une coupelle (88) de protection du jet de liquide, dont la paroi latérale (98) entoure la sortie (47) de la buse (40) et s'étend en aval de cette sortie , dans le sens d'écoulement du liquide.Head according to any one of Claims 1 to 5, characterized in that it comprises a liquid jet protection cup (88), of which the side wall (98) surrounds the outlet (47) of the nozzle (40) and extends downstream of this outlet, in the direction liquid flow. Tête selon l'une quelconque des revendications 1 à 6, destinée à délivrer du liquide cryogénique à des récipients (18) défilant sur un convoyeur (20), caractérisée en ce qu'elle comprend un déflecteur (86) de détournement d'air et de raclage présentant une extrémité (92) située en amont de la périphérie extérieure de ladite tête, dans le sens de défilement desdits récipients, et dont la paroi latérale (94) s'étend en aval de l'orifice aval (47) de la tête, dans le sens d'écoulement du liquide.Head according to any one of Claims 1 to 6, intended to deliver liquid cryogenic to containers (18) scrolling on a conveyor (20), characterized in that it comprises a air diversion and scraping deflector (86) having one end (92) located upstream of the outer periphery of said head, in the direction of scrolling of said containers, and whose side wall (94) extends downstream of the downstream orifice (47) of the head, in the direction of liquid flow. Ligne de transfert (12) de fluide cryogénique, alimentée par une source (4) dudit liquide cryogénique, du type comprenant un conduit central (24) de passage dudit liquide, et une enveloppe extérieure (28), caractérisée en ce qu'elle est équipée d'une tête (14) selon l'une quelconque des revendications 1 à 7.Fluid transfer line (12) cryogenic, supplied by a source (4) of said liquid cryogenic, of the type comprising a central duct (24) passage of said liquid, and an outer casing (28), characterized in that it is equipped with a head (14) according to any one of claims 1 to 7. Ligne de transfert selon la revendication 8, caractérisée en ce que ladite enveloppe extérieure (28) et ledit châssis (56, 58) comprennent des collerettes (30, 64) en regard, en saillie vers l'extérieur, sur lesquelles est disposé un collier de serrage (16) en vue de la fixation de ladite tête sur ladite ligne. Transfer line according to claim 8, characterized in that said outer casing (28) and said chassis (56, 58) include flanges (30, 64) opposite, projecting outwards, on which is arranged a clamp (16) in view fixing said head on said line. Ligne de transfert selon la revendication 9, caractérisée en ce qu'un anneau adaptateur (33) et un joint torique (106) sont disposés entre lesdites collerettes(30, 64).Transfer line according to claim 9, characterized in that an adapter ring (33) and a O-ring (106) are disposed between said flanges (30, 64). Installation de fourniture de liquide cryogénique, du type comprenant une source (4) dudit liquide et au moins une ligne de transfert (12) de ce liquide, caractérisée en ce que la ligne de transfert (12) est conforme à l'une quelconque des revendications 8 à 10.Liquid supply installation cryogenic, of the type comprising a source (4) of said liquid and at least one transfer line (12) therefrom liquid, characterized in that the transfer line (12) according to any one of claims 8 to 10.
EP98401478A 1997-07-07 1998-06-17 Cryogenic liquid transfer line, equipped with a filling head for this liquid Ceased EP0893348A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9708589A FR2765662B1 (en) 1997-07-07 1997-07-07 SUPPLY HEAD OF A CRYOGENIC LIQUID, TRANSFER LINE AND SUPPLY INSTALLATION PROVIDED WITH SUCH A HEAD
FR9708589 1997-07-07

Publications (1)

Publication Number Publication Date
EP0893348A1 true EP0893348A1 (en) 1999-01-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401478A Ceased EP0893348A1 (en) 1997-07-07 1998-06-17 Cryogenic liquid transfer line, equipped with a filling head for this liquid

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US (1) US5983959A (en)
EP (1) EP0893348A1 (en)
JP (1) JPH11100005A (en)
FR (1) FR2765662B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1813854A1 (en) * 2006-01-27 2007-08-01 L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Process and arrangement for filling high pressure gas containers using a filling tube
EP2474769A3 (en) * 2011-01-05 2014-01-22 Azote Services Device and method for transferring a cryogenic liquid
FR2973859B1 (en) * 2011-04-05 2014-07-04 Azote Services DEVICE AND METHOD FOR TRANSFERRING CRYOGENIC LIQUID

Citations (3)

* Cited by examiner, † Cited by third party
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
GB2092552A (en) * 1980-12-17 1982-08-18 Boc Ltd Dispensing apparatus
FR2688469A1 (en) * 1992-03-16 1993-09-17 Air Liquide Device for sequenced injection of a metered amount of cryogenic liquid

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4407340A (en) * 1980-12-18 1983-10-04 Reynolds Metals Company Container pressurization system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2092552A (en) * 1980-12-17 1982-08-18 Boc Ltd Dispensing apparatus
FR2496837A1 (en) * 1980-12-18 1982-06-25 Reynolds Metals Co APPARATUS FOR PRESSURIZING CONTAINERS CONTAINING NON-CARBONATE LIQUID PRODUCTS
FR2688469A1 (en) * 1992-03-16 1993-09-17 Air Liquide Device for sequenced injection of a metered amount of cryogenic liquid

Also Published As

Publication number Publication date
FR2765662A1 (en) 1999-01-08
JPH11100005A (en) 1999-04-13
FR2765662B1 (en) 1999-08-06
US5983959A (en) 1999-11-16

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