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EP0893395A1 - Electrovalve and its use in an apparatus for dispensing cryogenic liquid and in a filling unit - Google Patents

Electrovalve and its use in an apparatus for dispensing cryogenic liquid and in a filling unit Download PDF

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Publication number
EP0893395A1
EP0893395A1 EP98401476A EP98401476A EP0893395A1 EP 0893395 A1 EP0893395 A1 EP 0893395A1 EP 98401476 A EP98401476 A EP 98401476A EP 98401476 A EP98401476 A EP 98401476A EP 0893395 A1 EP0893395 A1 EP 0893395A1
Authority
EP
European Patent Office
Prior art keywords
solenoid valve
valve according
inlet
outlet
containers
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.)
Withdrawn
Application number
EP98401476A
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 EP0893395A1 publication Critical patent/EP0893395A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
    • B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
    • B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
    • B67C3/22—Details
    • B67C3/222—Head-space air removing devices, e.g. by inducing foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
    • B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
    • B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
    • B67C3/22—Details
    • B67C3/28—Flow-control devices, e.g. using valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87322—With multi way valve having serial valve in at least one branch

Definitions

  • the present invention relates to a solenoid valve of the type comprising a valve body provided with a conduit inlet, outlet conduit and means adapted to selectively activate communication these two conduits. It applies in specific to nitrogen inerting / pressurization of bottles containing a flat liquid, for example juice fruits.
  • the technique of inerting / pressurizing containers using nitrogen is to deliver to each container scrolling on a conveyor, after filling, a dose liquid nitrogen.
  • the response time of the solenoid valve should be on the order of a few milliseconds.
  • the solenoid valve coil must not not cause liquid nitrogen to enter the substantial heat, to prevent the formation of gas plugs disrupting the exit of nitrogen doses liquid.
  • the invention aims to provide a solenoid valve to very low response time especially suitable for cryogenic applications, for example for those mentioned above.
  • the invention relates to a solenoid valve of the aforementioned type, characterized in that the valve body includes at least two separate passages that connect the inlet duct to the outlet duct, and in that the actuation means comprise several actuators each of which is adapted to selectively seal one of said passages.
  • the packaging installation shown on Figure 1 comprises a conveyor 1 on which bottles 2 scroll in a single file, in the direction of arrow F.
  • the bottles pass successively under a filling station 3 with liquid 4, under a device 5 to supply each bottle with a dose of nitrogen liquid, then under a station 6 for closing the bottles by means of a capsule 7.
  • the apparatus 5 includes a tank of liquid nitrogen 8, suitably thermally insulated and equipped with all the classic accessories for his supply of liquid nitrogen and its venting, a dispensing head 9, and a transfer line 10 vacuum insulated which connects the tank to this head.
  • the pipe 10 is vertical, and the tank 8 is raised and possibly under pressure, so that driving is in charge.
  • Head 9 ( Figures 2 to 5) includes a solenoid valve 11 housed in a case 12. The space remaining free in this the latter is filled with a thermal insulation material, of which a part has been illustrated at 13 in FIG. 2.
  • the solenoid valve 11 essentially comprises a body valve 14, four actuators 15, an inlet nozzle 16 and a blowing tube 17.
  • the body 14 ( Figures 4 and 5) has the general shape a parallelepiped block extended upwards by a inlet manifold 18.
  • the bore of this manifold is ends approximately halfway up the block, which is provided four bores 19 with coplanar and horizontal axes arranged at 90 ° to each other.
  • the entrance to each bore 19 is counterbored at 20, and an annular seat 21 is defined at the bottom of each counterbore.
  • Tubing 18 ends above the bores and communicates with the chambers 22 defined at the bottom of the counter bores, by four openings 23.
  • a conduit exit 24 goes down from the intersection point of bores 19 and is defined, in its downstream part, by a outlet pipe 25, projecting from the body 14.
  • the pipes 18 and 25 have a common vertical axis X-X, the inner diameter of tubing 25 is much less than that of tubing 19.
  • the body 14 also has, between two bores 19 and in the same horizontal plane, an end leads 26 to counterbored entry.
  • Each actuator 15 is a coil whose core carries at its end a shutter 27 adapted to cooperate with the corresponding seat 21.
  • the actuator is provided with a threaded end piece 28 for fixing in the counterbore 20.
  • the four coils are connected via wires 29 to a connection 30 of the housing 12.
  • the inlet nozzle 16 is a material tube thermally insulating, namely Teflon, which slides in tubing 18. Its upper, flared end is elastically biased upwards by a bellows metallic 31 and internally has a shape funnel 32.
  • valve body is wedged in the housing 12 at by means of insulating shims 33 which line the walls inside of the case.
  • the lower wedges and peripheral are provided with heating elements 34 to incorporated electrical resistance.
  • the tube 17, which forms an expansion loop at the inside of the case, is fixed by its downstream end in the inlet of bore 26 and through its upstream end in a gas inlet fitting 35 provided on the housing.
  • the housing 12 has a cylindrical shape around the body 14, then converges upwards around the nozzle 16, then is extended upwards by a tube 36. This last connects to the outside pipe of line 10 by a flange and hose clamp connection 37, with interposition of a centering ring 38 and a seal sealing 39.
  • the inner pipe 40 of the pipe 10 extends beyond the downstream obturation device 41 of the pipe, crosses the tubing 36, and carries at its end a nozzle spherical 42 in stainless steel. Under the effect of the bellows 31, when the connection of the dispensing head 9 to the pipe 10 is made, the end piece 42 is applied with a reliable linear contact in the input funnel 32 of the nozzle 16.
  • control means 43 Figure 1 put sequentially and cyclically the actuators in open position, synchronization being performed at from signals supplied by sensors 44 which detect the passage of successive bottles 4.
  • pressurized gas is sent via tube 17 and the bore 26 at the inlet of the outlet conduit 24, which isolates a precise dose of liquid nitrogen equal to the volume of this outlet duct and expels it down.
  • This gas propellant can in particular be nitrogen gas at ambient temperature.
  • the distribution head is fully assembled, all along the liquid nitrogen circuit, of compatible materials with liquid nitrogen and with cleaning products from the installation.
  • the valve body 14 is made of stainless steel
  • nozzle 16 is in Teflon
  • the shutters are in "Buna".
  • the actuators 15 can be constituted by commercial components of low power (at most 10 W) to limit heat gain.
  • the presence of the elements 34 in the housing 12 prevents any formation of condensation or frost, especially in the region of liquid nitrogen outlet.
  • the variant of solenoid valve can be used three actuators whose bodies 14 are shown in the Figures 6 and 7.
  • the axes of the three actuators are new coplanar and horizontal, and they're arranged in star at 120 ° from each other ( Figure 7).
  • the areas of the openings 33 have been increased, in order to provide more free passage permanent with liquid nitrogen from inlet pipe 18 to chambers 22.
  • These openings 23 thus have a bean, as seen in Figure 6.
  • outlet pipe 24 is internally threaded to fixing an interchangeable outlet nozzle (not represented).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vacuum Packaging (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The cryogenic liquid may be supplied to a conveyor which is packaging liquids in containers using an electrovalve head (9). The valve body (14) receives the cryogenic liquid through an insulated duct (16,18) and there are two distinct passages (19,22) through to the exit (24). Electrically operated actuators (15) are energised (29,30) selectively to open the passages (19,22) to the exit (24). Nitrogen gas at ambient temperature is introduced (17,26) to the valve chamber and acts as a propellant to expel precise doses of the liquid nitrogen. Heating elements (34) prevent icing or condensation.

Description

La présente invention est relative à une électrovanne du type comprenant un corps de vanne muni d'un conduit d'entrée, d'un conduit de sortie et de moyens d'actionnement adaptés pour mettre sélectivement en communication ces deux conduits. Elle s'applique en particulier à l'inertage/pressurisation à l'azote de bouteilles contenant un liquide plat, par exemple un jus de fruits.The present invention relates to a solenoid valve of the type comprising a valve body provided with a conduit inlet, outlet conduit and means adapted to selectively activate communication these two conduits. It applies in specific to nitrogen inerting / pressurization of bottles containing a flat liquid, for example juice fruits.

La technique d'inertage/pressurisation de récipients au moyen d'azote consiste à délivrer à chaque récipient défilant sur un convoyeur, après son remplissage, une dose déterminée d'azote liquide. Le début de la vaporisation de l'azote, le récipient étant ouvert, chasse l'air en contact avec le produit conditionné, puis, après fermeture du récipient, la fin de la vaporisation de l'azote met le récipient en pression et le rigidifie, ce qui facilite sa manutention ultérieure.The technique of inerting / pressurizing containers using nitrogen is to deliver to each container scrolling on a conveyor, after filling, a dose liquid nitrogen. The start of spraying nitrogen, container open, expels air in contact with the packaged product, then, after closing the container, the end of the nitrogen vaporization puts the pressure container and stiffens it, which facilitates its subsequent handling.

Dans certains cas, par exemple lorsque les récipients sont des bouteilles, il est nécessaire d'injecter dans chaque récipient la dose nécessaire d'azote liquide, ce qui implique l'utilisation d'une électrovanne.In some cases, for example when the containers are bottles it is necessary to inject into each container the necessary dose of liquid nitrogen, which involves the use of a solenoid valve.

Compte-tenu des cadences de défilement des chaínes de conditionnement modernes, le temps de réponse de l'électrovanne doit être de l'ordre de quelques millisecondes. De plus, la bobine de l'électrovanne ne doit pas provoquer dans le circuit d'azote liquide d'entrées de chaleur substantielles, pour éviter la formation de bouchons gazeux perturbant la sortie des doses d'azote liquide.Given the frame rates of the chains of modern packaging, the response time of the solenoid valve should be on the order of a few milliseconds. In addition, the solenoid valve coil must not not cause liquid nitrogen to enter the substantial heat, to prevent the formation of gas plugs disrupting the exit of nitrogen doses liquid.

Ces conditions sont d'autant plus critiques qu'une dose insuffisante d'azote liquide conduit à un mauvais inertage du récipient et/ou à une pressurisation insuffisante, tandis qu'une dose excessive risque de provoquer l'explosion du récipient.These conditions are all the more critical since insufficient dose of liquid nitrogen leads to poor container inerting and / or pressurization insufficient, while an excessive dose may cause cause the container to explode.

L'invention a pour but de fournir une électrovanne à très faible temps de réponse convenant en particulier pour les applications cryogéniques, par exemple pour celles évoquées ci-dessus. The invention aims to provide a solenoid valve to very low response time especially suitable for cryogenic applications, for example for those mentioned above.

A cet effet, l'invention a pour objet une électrovanne du type précité, caractérisée en ce que le corps de vanne comprend au moins deux passages distincts qui relient le conduit d'entrée au conduit de sortie, et en ce que les moyens d'actionnement comprennent plusieurs actionneurs dont chacun est adapté pour obturer sélectivement l'un desdits passages.To this end, the invention relates to a solenoid valve of the aforementioned type, characterized in that the valve body includes at least two separate passages that connect the inlet duct to the outlet duct, and in that the actuation means comprise several actuators each of which is adapted to selectively seal one of said passages.

L'électrovanne suivant l'invention peut comporter une ou plusieurs des caractéristiques suivantes :

  • l'électrovanne est munie en outre de moyens de commande adaptés pour ouvrir séquentiellement et cycliquement les actionneurs;
  • les conduits d'entrée et de sortie sont alignés;
  • chaque passage comprend une chambre reliée en amont au conduit d'entrée et en aval au conduit de sortie et définissant un siège pour un obturateur de l'actionneur associé;
  • le siège est disposé entre la chambre et le conduit de sortie;
  • l'électrovanne comprend un nombre pair de chambres diamétralement opposées deux à deux;
  • l'électrovanne comprend au moins trois chambres disposées en étoile, et notamment en étoile régulière;
  • les actionneurs ont des axes coplanaires;
  • l'électrovanne comprend en outre une buse d'entrée en matière isolante montée coulissante dans le conduit d'entrée, et des moyens pour solliciter élastiquement la buse vers l'extérieur de ce conduit;
  • l'entrée de la buse a une forme d'entonnoir et l'électrovanne comprend en outre un embout sphérique adapté pour être fixé à l'extrémité de sortie d'une conduite d'alimentation en fluide;
  • l'électrovanne comprend des moyens d'injection d'un gaz propulseur en un point prédéterminé du conduit de sortie;
  • l'électrovanne étant destinée à la commande de la distribution de doses successives d'un liquide cryogénique, le corps de vanne est disposé dans un boítier isolé thermiquement et muni de moyens de chauffage.
The solenoid valve according to the invention may include one or more of the following characteristics:
  • the solenoid valve is further provided with control means adapted to open the actuators sequentially and cyclically;
  • the inlet and outlet conduits are aligned;
  • each passage comprises a chamber connected upstream to the inlet duct and downstream to the outlet duct and defining a seat for a shutter of the associated actuator;
  • the seat is arranged between the chamber and the outlet duct;
  • the solenoid valve includes an even number of diametrically opposite chambers two by two;
  • the solenoid valve comprises at least three chambers arranged in a star, and in particular in a regular star;
  • the actuators have coplanar axes;
  • the solenoid valve further comprises an inlet nozzle of insulating material slidably mounted in the inlet duct, and means for elastically biasing the nozzle towards the outside of this duct;
  • the inlet of the nozzle has a funnel shape and the solenoid valve further comprises a spherical nozzle adapted to be fixed to the outlet end of a fluid supply pipe;
  • the solenoid valve comprises means for injecting a propellant gas at a predetermined point of the outlet conduit;
  • the solenoid valve being intended to control the distribution of successive doses of a cryogenic liquid, the valve body is arranged in a thermally insulated housing and provided with heating means.

L'invention a également pour objets :

  • un appareil de fourniture de doses successives d'un liquide cryogénique, du type comprenant une tête de distribution reliée à une source dudit liquide, caractérisé en ce que la tête de distribution comprend une électrovanne telle que définie ci-dessus; et
  • une installation de conditionnement d'un produit dans des récipients en défilement, caractérisée en ce qu'elle comprend un appareil de fourniture de doses successives d'azote liquide tel que défini ci-dessus, disposé au-dessus du convoyeur des récipients, entre un poste de remplissage des récipients avec le produit et un poste de fermeture des récipients, et des moyens de synchronisation de l'ouverture desdits moyens d'actionnement avec le passage des récipients sous ledit appareil.
Another subject of the invention is:
  • an apparatus for supplying successive doses of a cryogenic liquid, of the type comprising a dispensing head connected to a source of said liquid, characterized in that the dispensing head comprises a solenoid valve as defined above; and
  • an installation for packaging a product in scrolling containers, characterized in that it comprises an apparatus for supplying successive doses of liquid nitrogen as defined above, disposed above the conveyor of the containers, between a station for filling the containers with the product and a station for closing the containers, and means for synchronizing the opening of said actuation means with the passage of the containers under said device.

Des exemples de réalisation de l'invention vont maintenant être décrits en regard des dessins annexés, sur lesquels :

  • la Figure 1 représente schématiquement une installation de conditionnement conforme à l'invention;
  • la Figure 2 représente en coupe longitudinale la tête de distribution de cette installation, la coupe étant prise suivant la ligne brisée II-II de la Figure 3;
  • la Figure 3 est une vue en plan de l'électrovanne;
  • la Figure 4 représente en coupe longitudinale, suivant la ligne IV-IV de la Figure 5, le corps de l'électrovanne;
  • la Figure 5 est une vue prise en coupe suivant la ligne V-V de la Figure 4;
  • la Figure 6 est une vue en élévation d'une variante du corps de l'électrovanne; et
  • la Figure 7 est une vue prise en coupe suivant la ligne VII-VII de la Figure 6.
Examples of embodiments of the invention will now be described with reference to the appended drawings, in which:
  • Figure 1 schematically shows a packaging installation according to the invention;
  • Figure 2 shows in longitudinal section the dispensing head of this installation, the section being taken along the broken line II-II of Figure 3;
  • Figure 3 is a plan view of the solenoid valve;
  • Figure 4 shows in longitudinal section, along the line IV-IV of Figure 5, the body of the solenoid valve;
  • Figure 5 is a sectional view taken along line VV of Figure 4;
  • Figure 6 is an elevational view of a variant of the body of the solenoid valve; and
  • Figure 7 is a sectional view along line VII-VII of Figure 6.

L'installation de conditionnement représentée sur la Figure 1 comprend un convoyeur 1 sur lequel des bouteilles 2 défilent en une seule file, dans le sens de la flèche F. Les bouteilles passent successivement sous un poste 3 de remplissage avec un liquide 4, sous un appareil 5 de fourniture à chaque bouteille d'une dose d'azote liquide, puis sous un poste 6 de fermeture des bouteilles au moyen d'une capsule 7.The packaging installation shown on Figure 1 comprises a conveyor 1 on which bottles 2 scroll in a single file, in the direction of arrow F. The bottles pass successively under a filling station 3 with liquid 4, under a device 5 to supply each bottle with a dose of nitrogen liquid, then under a station 6 for closing the bottles by means of a capsule 7.

L'appareil 5 comprend un réservoir d'azote liquide 8, convenablement isolé thermiquement et équipé de l'ensemble des accessoires classiques pour son approvisionnement en azote liquide et sa mise à l'air, une tête de distribution 9, et une conduite de transfert 10 isolée sous vide qui relie le réservoir à cette tête. Dans cet exemple, la conduite 10 est verticale, et le réservoir 8 est surélevé et éventuellement sous pression, de sorte que la conduite est en charge.The apparatus 5 includes a tank of liquid nitrogen 8, suitably thermally insulated and equipped with all the classic accessories for his supply of liquid nitrogen and its venting, a dispensing head 9, and a transfer line 10 vacuum insulated which connects the tank to this head. In this example, the pipe 10 is vertical, and the tank 8 is raised and possibly under pressure, so that driving is in charge.

La tête 9 (Figures 2 à 5) comprend une électrovanne 11 logée dans un boítier 12. L'espace restant libre dans ce dernier est empli d'un matériau d'isolation thermique, dont une partie a été illustrée en 13 sur la Figure 2.Head 9 (Figures 2 to 5) includes a solenoid valve 11 housed in a case 12. The space remaining free in this the latter is filled with a thermal insulation material, of which a part has been illustrated at 13 in FIG. 2.

L'électrovanne 11 comprend essentiellement un corps de vanne 14, quatre actionneurs 15, une buse d'entrée 16 et une tube de soufflage 17.The solenoid valve 11 essentially comprises a body valve 14, four actuators 15, an inlet nozzle 16 and a blowing tube 17.

Le corps 14 (Figures 4 et 5) a la forme générale d'un bloc parallélépipédique prolongé vers le haut par une tubulure d'entrée 18. L'alésage de cette tubulure se termine à peu près à mi-hauteur du bloc, lequel est pourvu de quatre alésages 19 à axes coplanaires et horizontaux disposés à 90° les uns des autres. L'entrée de chaque alésage 19 est contre-alésée en 20, et un siège annulaire 21 est défini au fond de chaque contre-alésage.The body 14 (Figures 4 and 5) has the general shape a parallelepiped block extended upwards by a inlet manifold 18. The bore of this manifold is ends approximately halfway up the block, which is provided four bores 19 with coplanar and horizontal axes arranged at 90 ° to each other. The entrance to each bore 19 is counterbored at 20, and an annular seat 21 is defined at the bottom of each counterbore.

La tubulure 18 se termine au-dessus des alésages et communique avec les chambres 22 définies au fond des contre-alésages, par quatre ouvertures 23. Un conduit de sortie 24 part vers le bas du point d'intersection des alésages 19 et est défini, dans sa partie aval, par une tubulure de sortie 25, en saillie sur le corps 14. Les tubulures 18 et 25 ont un axe vertical commun X-X, le diamètre intérieur de la tubulure 25 est très inférieur à celui de la tubulure 19.Tubing 18 ends above the bores and communicates with the chambers 22 defined at the bottom of the counter bores, by four openings 23. A conduit exit 24 goes down from the intersection point of bores 19 and is defined, in its downstream part, by a outlet pipe 25, projecting from the body 14. The pipes 18 and 25 have a common vertical axis X-X, the inner diameter of tubing 25 is much less than that of tubing 19.

Le corps 14 présente encore, entre deux alésages 19 et dans le même plan horizontal, un fin conduit 26 à entrée contre-alésée.The body 14 also has, between two bores 19 and in the same horizontal plane, an end leads 26 to counterbored entry.

Chaque actionneur 15 est une bobine dont le noyau porte à son extrémité un obturateur 27 adapté pour coopérer avec le siège 21 correspondant. L'actionneur est muni d'un embout fileté 28 pour sa fixation dans le contre-alésage 20. Les quatre bobines sont reliées via des fils 29 à un raccord 30 du boítier 12.Each actuator 15 is a coil whose core carries at its end a shutter 27 adapted to cooperate with the corresponding seat 21. The actuator is provided with a threaded end piece 28 for fixing in the counterbore 20. The four coils are connected via wires 29 to a connection 30 of the housing 12.

La buse d'entrée 16 est un tube en matière thermiquement isolante, à savoir en Téflon, qui coulisse dans la tubulure 18. Son extrémité supérieure, évasée, est sollicitée élastiquement vers le haut par un soufflet métallique 31 et présente intérieurement une forme d'entonnoir 32.The inlet nozzle 16 is a material tube thermally insulating, namely Teflon, which slides in tubing 18. Its upper, flared end is elastically biased upwards by a bellows metallic 31 and internally has a shape funnel 32.

Le corps de vanne est calé dans le boítier 12 au moyen de cales isolantes 33 qui tapissent les parois intérieures du boítier. Les cales inférieure et périphérique sont munies d'éléments chauffants 34 à résistance électrique incorporée.The valve body is wedged in the housing 12 at by means of insulating shims 33 which line the walls inside of the case. The lower wedges and peripheral are provided with heating elements 34 to incorporated electrical resistance.

Le tube 17, qui forme une boucle de dilatation à l'intérieur du boítier, est fixé par son extrémité aval dans l'entrée de l'alésage 26 et par son extrémité amont dans un raccord d'entrée de gaz 35 prévu sur le boítier.The tube 17, which forms an expansion loop at the inside of the case, is fixed by its downstream end in the inlet of bore 26 and through its upstream end in a gas inlet fitting 35 provided on the housing.

Le boítier 12 a une forme cylindrique autour du corps 14, puis converge vers le haut autour de la buse 16, puis se prolonge vers le haut par une tubulure 36. Cette dernière se raccorde au tuyau extérieur de la conduite 10 par un raccordement à brides et à collier de serrage 37, avec interposition d'un anneau de centrage 38 et d'un joint d'étanchéité 39.The housing 12 has a cylindrical shape around the body 14, then converges upwards around the nozzle 16, then is extended upwards by a tube 36. This last connects to the outside pipe of line 10 by a flange and hose clamp connection 37, with interposition of a centering ring 38 and a seal sealing 39.

Le tuyau intérieur 40 de la conduite 10 s'étend au-delà du dispositif d'obturation aval 41 de la conduite, traverse la tubulure 36, et porte à son extrémité un embout sphérique 42 en acier inoxydable. Sous l'effet du soufflet 31, lorsque le raccordement de la tête de distribution 9 à la conduite 10 est réalisé, l'embout 42 s'applique avec un contact linéaire fiable dans l'entonnoir d'entrée 32 de la buse 16.The inner pipe 40 of the pipe 10 extends beyond the downstream obturation device 41 of the pipe, crosses the tubing 36, and carries at its end a nozzle spherical 42 in stainless steel. Under the effect of the bellows 31, when the connection of the dispensing head 9 to the pipe 10 is made, the end piece 42 is applied with a reliable linear contact in the input funnel 32 of the nozzle 16.

En service, l'azote liquide parvient en permanence, sous une surpression modérée, aux orifices 23 du corps de vanne. Au départ, tous les actionneurs 15 sont en position de fermeture. Lorsque la mise en froid de l'électrovanne est terminée, des moyens de commande 43 (Figure 1) mettent séquentiellement et cycliquement les actionneurs en position d'ouverture, la synchronisation étant réalisée à partir de signaux fournis par des capteurs 44 qui détectent le passage des bouteilles 4 successives.In service, liquid nitrogen is continuously supplied, under moderate overpressure, at the orifices 23 of the body of valve. At the start, all the actuators 15 are in position closing. When the solenoid valve has cooled down is complete, control means 43 (Figure 1) put sequentially and cyclically the actuators in open position, synchronization being performed at from signals supplied by sensors 44 which detect the passage of successive bottles 4.

De plus, entre deux mouvements d'ouverture successifs, du gaz sous pression est envoyé via le tube 17 et l'alésage 26 à l'entrée du conduit de sortie 24, ce qui isole une dose précise d'azote liquide égale au volume de ce conduit de sortie et l'expulse vers le bas. Ce gaz propulseur peut notamment être de l'azote gazeux à température ambiante.In addition, between two opening movements successive, pressurized gas is sent via tube 17 and the bore 26 at the inlet of the outlet conduit 24, which isolates a precise dose of liquid nitrogen equal to the volume of this outlet duct and expels it down. This gas propellant can in particular be nitrogen gas at ambient temperature.

L'expérience a montré qu'une telle tête de distribution pouvait posséder un temps de réponse inférieur à 10 millisecondes et une durée de vie d'au moins 10 millions de cycles, tout en délivrant à chaque cycle une quantité pratiquement constante d'azote liquide.Experience has shown that such a head of distribution could have a lower response time at 10 milliseconds and a lifespan of at least 10 million cycles, while delivering each cycle a practically constant amount of liquid nitrogen.

Par ailleurs, dans l'application considérée, la tête de distribution est entièrement constituée, tout le long du circuit d'azote liquide, de matériaux compatibles avec l'azote liquide et avec les produits de nettoyage de l'installation. Ainsi, dans l'exemple décrit ci-dessus, le corps de vanne 14 est en acier inoxydable, la buse 16 est en Téflon et les obturateurs sont en "Buna".Furthermore, in the application considered, the distribution head is fully assembled, all along the liquid nitrogen circuit, of compatible materials with liquid nitrogen and with cleaning products from the installation. So, in the example described above, the valve body 14 is made of stainless steel, nozzle 16 is in Teflon and the shutters are in "Buna".

De plus, les actionneurs 15 peuvent être constitués par des composants du commerce de faible puissance (au plus 10 W) pour limiter les apports de chaleur.In addition, the actuators 15 can be constituted by commercial components of low power (at most 10 W) to limit heat gain.

On notera encore que la présence des éléments chauffants 34 dans le boítier 12 empêche toute formation de condensation ou de givre, notamment dans la région de la sortie d'azote liquide.It will also be noted that the presence of the elements 34 in the housing 12 prevents any formation of condensation or frost, especially in the region of liquid nitrogen outlet.

Pour délivrer des doses d'azote liquide plus importantes, on peut utiliser la variante d'électrovanne à trois actionneurs dont le corps 14 est représenté sur les Figures 6 et 7. Les axes des trois actionneurs sont de nouveau coplanaires et horizontaux, et ils sont disposés en étoile à 120° les uns des autres (Figure 7). De plus, par des opérations de fraisage, les aires des ouvertures 33 ont été augmentées, afin d'offrir un plus libre passage permanent à l'azote liquide du conduit d'entrée 18 aux chambres 22. Ces ouvertures 23 ont ainsi une forme en haricot, comme on le voit sur la Figure 6.To deliver more liquid nitrogen doses important, the variant of solenoid valve can be used three actuators whose bodies 14 are shown in the Figures 6 and 7. The axes of the three actuators are new coplanar and horizontal, and they're arranged in star at 120 ° from each other (Figure 7). In addition, by milling operations, the areas of the openings 33 have been increased, in order to provide more free passage permanent with liquid nitrogen from inlet pipe 18 to chambers 22. These openings 23 thus have a bean, as seen in Figure 6.

On notera également que, dans ce mode de réalisation, la tubulure de sortie 24 est intérieurement filetée pour la fixation d'un embout de sortie interchangeable (non représenté).It will also be noted that, in this embodiment, the outlet pipe 24 is internally threaded to fixing an interchangeable outlet nozzle (not represented).

Claims (14)

Electrovanne, du type comprenant un corps de vanne (14) muni d'un conduit d'entrée (18), d'un conduit de sortie (24) et de moyens d'actionnement (15) adaptés pour mettre sélectivement en communication ces deux conduits, caractérisé en ce que le corps de vanne (14) comprend au moins deux passages distincts (19, 22) qui relient le conduit d'entrée (18) au conduit de sortie (24), et en ce que les moyens d'actionnement comprennent plusieurs actionneurs (15) dont chacun est adapté pour obturer sélectivement l'un desdits passages.Solenoid valve, of the type comprising a valve body (14) provided with an inlet duct (18), a outlet (24) and actuating means (15) adapted to selectively connect these two conduits, characterized in that the valve body (14) comprises at minus two separate passages (19, 22) which connect the inlet conduit (18) to the outlet conduit (24), and in this that the actuation means include several actuators (15) each of which is adapted to seal selectively one of said passages. Electrovanne suivant la revendication 1, caractérisée en ce qu'elle est munie en outre de moyens de commande (43) adaptés pour ouvrir séquentiellement et cycliquement les actionneurs (15).Solenoid valve according to claim 1, characterized in that it is further provided with means for control (43) adapted to open sequentially and cyclically the actuators (15). Electrovanne suivant la revendication 1 ou 2, caractérisée en ce que les conduits d'entrée (18) et de sortie (24) sont alignés.Solenoid valve according to claim 1 or 2, characterized in that the inlet (18) and outlet (24) are aligned. Electrovanne suivant l'une quelconque des revendications 1 à 3, caractérisée en ce que chaque passage (19, 22) comprend une chambre (22) reliée en amont au conduit d'entrée (18) et en aval au conduit de sortie (24) et définissant un siège (21) pour un obturateur (27) de l'actionneur (15) associé.Solenoid valve according to any one of Claims 1 to 3, characterized in that each passage (19, 22) comprises a chamber (22) connected upstream to the inlet pipe (18) and downstream to the outlet pipe (24) and defining a seat (21) for a shutter (27) of the associated actuator (15). Electrovanne suivant la revendication 4, caractérisée en ce que le siège (21) est disposé entre la chambre (22) et le conduit de sortie (24).Solenoid valve according to claim 4, characterized in that the seat (21) is arranged between the chamber (22) and the outlet conduit (24). Electrovanne suivant les revendications 4 ou 5, caractérisée en ce qu'elle comprend un nombre pair de chambres (22) diamétralement opposées deux à deux.Solenoid valve according to claims 4 or 5, characterized in that it comprises an even number of chambers (22) diametrically opposite two by two. Electrovanne suivant l'une quelconque des revendications 4 à 6, caractérisée en ce qu'elle comprend au moins trois chambres (22) disposées en étoile, et notamment en étoile régulière.Solenoid valve according to any one of Claims 4 to 6, characterized in that it comprises at least three chambers (22) arranged in a star, and especially in regular star. Electrovanne suivant la revendication 6 ou 7, caractérisée en ce que les actionneurs (15) ont des axes coplanaires. Solenoid valve according to claim 6 or 7, characterized in that the actuators (15) have axes coplanar. Electrovanne suivant l'une quelconque des revendications 1 à 8, caractérisée en ce qu'elle comprend en outre une buse d'entrée (16) en matière isolante montée coulissante dans le conduit d'entrée (18), et des moyens (31) pour solliciter élastiquement la buse vers l'extérieur de ce conduit.Solenoid valve according to any one of Claims 1 to 8, characterized in that it comprises additionally an inlet nozzle (16) of insulating material mounted sliding in the inlet duct (18), and means (31) to elastically urge the nozzle outwards of this conduit. Electrovanne suivant la revendication 9, caractérisée en ce que l'entrée (32) de la buse (16) a une forme d'entonnoir, et en ce que l'électrovanne comprend en outre un embout sphérique (42) adapté pour être fixé à l'extrémité de sortie d'une conduite d'alimentation en fluide (10).Solenoid valve according to claim 9, characterized in that the inlet (32) of the nozzle (16) has a funnel shape, and in that the solenoid valve includes in addition to a spherical end piece (42) adapted to be fixed to the outlet end of a supply line in fluid (10). Electrovanne suivant l'une quelconque des revendications 1 à 10, caractérisée en ce qu'elle comprend des moyens (17) d'injection d'un gaz propulseur en un point prédéterminé du conduit de sortie (24).Solenoid valve according to any one of Claims 1 to 10, characterized in that it comprises means (17) for injecting a propellant gas at a point predetermined outlet pipe (24). Electrovanne suivant l'une quelconque des revendications 1 à 11, pour la commande de la distribution de doses successives d'un liquide cryogénique, caractérisée en ce que le corps de vanne (14) est disposé dans un boítier (12) isolé thermiquement et muni de moyens de chauffage (34).Solenoid valve according to any one of claims 1 to 11, for the control of the distribution successive doses of a cryogenic liquid, characterized in that the valve body (14) is arranged in a case (12) thermally insulated and provided with means heating (34). Appareil de fourniture de doses successives d'un liquide cryogénique, du type comprenant une tête de distribution (9) reliée à une source (8) dudit liquide, caractérisé en ce que la tête de distribution (9) comprend une électrovanne (11) suivant l'une quelconque des revendications 1 à 12.Apparatus for delivering successive doses of a cryogenic liquid, of the type comprising a distribution (9) connected to a source (8) of said liquid, characterized in that the dispensing head (9) comprises a solenoid valve (11) according to any one of claims 1 to 12. Installation de conditionnement d'un produit dans des récipients (4) en défilement, caractérisée en ce qu'elle comprend un appareil (5) de fourniture de doses successives d'azote liquide suivant la revendication 13, disposé au-dessus du convoyeur (1) des récipients, entre un poste (3) de remplissage des récipients avec le produit et un poste (6) de fermeture des récipients, et des moyens (43, 44) de synchronisation de l'ouverture desdits moyens d'actionnement (15) avec le passage des récipients sous ledit appareil (5).Installation for packaging a product in scrolling containers (4), characterized in that it includes a device (5) for delivering doses successive liquid nitrogen according to claim 13, arranged above the container conveyor (1), between a station (3) for filling the containers with the product and a station (6) for closing the containers, and means (43, 44) for synchronizing the opening of said means actuation (15) with the passage of the containers under said apparatus (5).
EP98401476A 1997-07-07 1998-06-17 Electrovalve and its use in an apparatus for dispensing cryogenic liquid and in a filling unit Withdrawn EP0893395A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9708587A FR2765655B1 (en) 1997-07-07 1997-07-07 SOLENOID VALVE AND ITS APPLICATION TO A CRYOGENIC LIQUID SUPPLY APPARATUS AND A PACKAGING INSTALLATION
FR9708587 1997-07-07

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DE102007016159B4 (en) * 2007-04-02 2018-11-22 Khs Corpoplast Gmbh Method and device for sterile filling
US7806966B2 (en) * 2007-12-27 2010-10-05 Bose Ranendra K Nitrogen inerting system for explosion prevention in aircraft fuel tank and oxygenating system for improving combustion efficiency of aerospace rockets/ aircraft engines
KR102363000B1 (en) 2015-11-10 2022-02-16 레르 리키드 쏘시에떼 아노님 뿌르 레드 에렉스뿔라따시옹 데 프로세데 조르즈 클로드 Adaptation of press-fit valves for top-inserted valves in cryogenic service
KR102362998B1 (en) * 2015-11-10 2022-02-16 레르 리키드 쏘시에떼 아노님 뿌르 레드 에렉스뿔라따시옹 데 프로세데 조르즈 클로드 Valve adaptation for top-inserted valves in cryogenic service
US12031680B1 (en) * 2024-01-22 2024-07-09 Vacuum Barrier Corporation Controlled dosing of liquid cryogen

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JPH11101354A (en) 1999-04-13
FR2765655A1 (en) 1999-01-08
FR2765655B1 (en) 1999-08-06

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