WO2002090822A1 - Sealing and connection device for the external pipes of a cryogenic liquid tank - Google Patents

Sealing and connection device for the external pipes of a cryogenic liquid tank Download PDF

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Publication number
WO2002090822A1
WO2002090822A1 PCT/FR2001/001391 FR0101391W WO02090822A1 WO 2002090822 A1 WO2002090822 A1 WO 2002090822A1 FR 0101391 W FR0101391 W FR 0101391W WO 02090822 A1 WO02090822 A1 WO 02090822A1
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WO
WIPO (PCT)
Prior art keywords
assembly
sub
channel
passage
tank
Prior art date
Application number
PCT/FR2001/001391
Other languages
French (fr)
Inventor
Guillaume Boucher
Original Assignee
L'air Liquide, Societe Anonyme À Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation 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 L'air Liquide, Societe Anonyme À Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude filed Critical L'air Liquide, Societe Anonyme À Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude
Priority to BR0106873-3A priority Critical patent/BR0106873A/en
Priority to US10/049,238 priority patent/US6732535B2/en
Priority to PCT/FR2001/001391 priority patent/WO2002090822A1/en
Priority to CA002382828A priority patent/CA2382828A1/en
Publication of WO2002090822A1 publication Critical patent/WO2002090822A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0639—Steels
    • F17C2203/0643—Stainless steels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0382—Constructional details of valves, regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/21—Shaping processes
    • F17C2209/2109—Moulding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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 cryogenic fluid reservoirs and, more particularly to sealing and connection devices to external pipes of such reservoirs.
  • the known devices for closing and connecting cryogenic fluid reservoirs consist of a mechanically welded assembly of a closure plate and connection pieces machined and fixed, typically by welding, in holes machined in the plate. shutter.
  • This technique is particularly expensive, because of the number of different parts to be produced, stored and assembled, and the large number of rejects resulting from the machining and welding problems of the constituent materials, typically austenitic stainless steels.
  • the object of the present invention is to propose a simplified device architecture making it possible to eliminate most of these problems and to greatly reduce the costs of manufacture and assembly.
  • the invention provides a device comprising a one-piece molded stainless steel sub-assembly, typically produced by lost wax molding, defining at least two, typically at least three fluid passage channels.
  • the one-piece sub-assembly is produced by molding from an austenitic stainless steel alloy comprising at least 16%, typically between 16 and 18.5% of chromium and at least 10% , typically between 10 and 13.5% nickel, and having, in the liquid phase, a ferrite content greater than 2%, preferably not exceeding 6%.
  • the present invention also relates to a cryogenic fluid reservoir, in particular liquid oxygen for home oxygen therapy, equipped with such a device and typically provided with two heaters atmospheric connected to the liquid and gas outlet passages of the device.
  • - Figure 1 is a schematic view in vertical section of the upper part of a cryogenic oxygen therapy tank provided with a device according to the invention
  • - Figure 2 is a sectional view of the device of Figure 1 in a section plane orthogonal to the section plane of Figure 1;
  • FIG. 3 is a side view of the device of Figure 2.
  • the device according to the invention comprises a sub -one-piece assembly 1 made of molded stainless steel essentially comprising a main disc-shaped part 4 having a transverse lower surface forming a joint plane 5 mounted flat on the flange 2 provided with an annular seal 6.
  • the sub-assembly 1 comprises a central chimney 7 orthogonal to the disc 4, substantially coaxial with the latter, and defining a central passage 8. In the main part 4 are defined, with.
  • a first transverse channel 9 opens out at the lower part of the disc 4 through a cavity 12 while the channel 11 opens out through a portion of channel 13 formed partly in a projecting shoulder 14 where the central channel 8 also opens downwards.
  • the channel 9 similarly opens downwards through a channel portion formed in a projecting shoulder 15. As can be seen in FIG. 1, opposite the channel 9 is formed an axial channel 16 passing through the disc 4 receiving a part 17 allowing the electrical connection to a level capacitive gauge 18.
  • the one-piece sub-assembly 1 is mounted on the flange 2 by three angularly distributed screws (not shown) and by a column 19 with a threaded lower end also serving, via a support plate 20, to support a flow control valve housing 21 , as we will see later.
  • the channel 9 receives the upstream end 22 of an atmospheric heating coil 23, as described in French patent application FR 99 13617, the portion of channel in the shoulder 15 receiving the end of a dip tube 24 extending to the vicinity of the bottom of the inner container of the reservoir 3.
  • a dip tube 25 is mounted in the lower end of the channel 8. The latter is extended upwards by a flare formed in an enlarged diameter head 26 comprising an external thread 27 and receiving the lower end of a valve filling terminal 28 held in place on the chimney 7 by a nut 29 cooperating with the thread 27.
  • transverse channel 10 To the transverse channel 10 is connected the upstream end of an atmospheric heating coil 30, the downstream end of which is connected to the aforementioned valve housing 21.
  • the channel 11 is in turn connected externally to a vent valve (not shown).
  • the filling with liquefied fluid, of the reservoir 3 takes place at a low pressure, close to 3 bar, via the valve terminal 28, the channel 8 and the tube 25, the interior volume of the reservoir being, during this operation, in communication with the ambient atmosphere via channels 13 and 11 and the vent valve downstream of the latter.
  • an overflow tube (not shown) extending in the tank, is brazed in the channel 13 to limit the height of liquid stored in the tank.
  • the cryogenic fluid in the liquid form contained in the tank pressurized by the gaseous air in the tank, is drawn up by the tube 24, the channel 9 and the coil 23 before reaching the flow control valve housing 21 supplying, via its outlet 31, a gaseous flow with controlled flow to a user.
  • the sampling of the gaseous phase in the reservoir 3 is carried out through the channel 10 and the coil 30 before reaching the valve housing 21, provided with at least one safety pressure relief valve 32.
  • the liquid outlet channel 9 is placed opposite the passage 16 for mounting the probe 18 so that the withdrawal of liquid is carried out with a minimum transmission of frigories to the passage 17 of the probe 18.
  • the channel 11 is extended outside the disc 4 by a transverse tubular extension 33 making it possible to move the vent valve away from the disc 4 and therefore to avoid excessive cooling of this valve.
  • the subassembly 1 is produced by lost wax molding, which virtually eliminates the need for machining, from stainless steel comprising at least 16% of chromium and at least 10% of nickel, typically a piece of stainless steel of the 316L type which, after casting, represents a ferrite content greater than 2%, typically between 2 and 6%, which is obtained by adding chromium to the bath of molten metal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

The invention relates to a sealing and connection device for the external pipes of a cryogenic liquid tank in the form of a single-piece, cast stainless steel sub-assembly (1) comprising a main disk-shaped part (4) which is mounted on a flange (2) of the tank (3). Said sub-assembly defines at least two fluid flow channels (8, 9), which are typically used for filling, airing and extracting gaseous and liquid phases and which are heated by atmospheric heaters (23; 30) in order to supply (31) a controlled gaseous flow. The invention is particularly suitable for cryogenic tanks of medical oxygen for oxygen therapy.

Description

DISPOSITIF D ' OBTURATION ET DE RACCORDEMENT A DES CANALISATIONS EXTERNES D ' UN RESERVOIR DE FLUIDE CRYOGENIQUEDEVICE FOR SEALING AND CONNECTING TO EXTERNAL PIPES OF A CRYOGENIC FLUID TANK
La présente invention concerne les réservoirs de fluide cryogénique et, plus particulièrement les dispositifs d'obturation et de raccordement à des canalisations externes de tels réservoirs.The present invention relates to cryogenic fluid reservoirs and, more particularly to sealing and connection devices to external pipes of such reservoirs.
Les dispositifs connus d'obturation et de raccordement des réservoirs de fluide cryogénique sont constitués d'un assemblage mécano-soudé d'une plaque d'obturation et de pièces de raccordement usinées et fixées, typiquement par soudage, dans des orifices usinés dans la plaque d'obturation. Cette technique est particulièrement onéreuse, du fait du nombre de pièces différentes à réaliser, stocker et assembler, et au nombre important de rebuts résultant des problèmes d'usinage et de soudage des matériaux constitutifs, typiquement des aciers inoxydables austénitiques. La présente invention a pour objet de proposer une architecture de dispositif simplifiée permettant de supprimer la plupart de ces problèmes et de réduire grandement les coûts de fabrication et d'assemblage.The known devices for closing and connecting cryogenic fluid reservoirs consist of a mechanically welded assembly of a closure plate and connection pieces machined and fixed, typically by welding, in holes machined in the plate. shutter. This technique is particularly expensive, because of the number of different parts to be produced, stored and assembled, and the large number of rejects resulting from the machining and welding problems of the constituent materials, typically austenitic stainless steels. The object of the present invention is to propose a simplified device architecture making it possible to eliminate most of these problems and to greatly reduce the costs of manufacture and assembly.
Pour ce faire, l'invention propose un dispositif comportant un sous- ensemble monobloc en acier inoxydable moulé, réalisé typiquement par moulage à la cire perdue, définissant au moins deux, typiquement au moins trois canaux de passage de fluide.To do this, the invention provides a device comprising a one-piece molded stainless steel sub-assembly, typically produced by lost wax molding, defining at least two, typically at least three fluid passage channels.
Selon une caractéristique plus particulière de l'invention, le sous- ensemble monobloc est réalisé par moulage à partir d'un alliage en acier inoxydable austénitique comprenant au moins 16%, typiquement entre 16 et 18,5% de chrome et au moins 10%, typiquement entre 10 et 13,5% de nickel, et ayant, en phase liquide, un taux de ferrite supérieur à 2%, de préférence n'excédant pas 6%.According to a more specific characteristic of the invention, the one-piece sub-assembly is produced by molding from an austenitic stainless steel alloy comprising at least 16%, typically between 16 and 18.5% of chromium and at least 10% , typically between 10 and 13.5% nickel, and having, in the liquid phase, a ferrite content greater than 2%, preferably not exceeding 6%.
La présente invention a également pour objet un réservoir de fluide cryogénique, notamment d'oxygène liquide pour oxygénothérapie à domicile, équipé d'un tel dispositif et typiquement pourvu de deux réchauffeurs atmosphériques reliés à des passages de sorties de liquide et de gaz du dispositif.The present invention also relates to a cryogenic fluid reservoir, in particular liquid oxygen for home oxygen therapy, equipped with such a device and typically provided with two heaters atmospheric connected to the liquid and gas outlet passages of the device.
D'autres avantages et caractéristiques de la présente invention ressortiront de la description suivante d'un mode de réalisation, donné à titre illustratif mais nullement limitatif, faite en relation avec les dessins annexés sur lesquels :Other advantages and characteristics of the present invention will emerge from the following description of an embodiment, given by way of illustration but in no way limiting, made in relation to the appended drawings in which:
- la figure 1 est une vue schématique en coupe verticale de la partie supérieure d'un réservoir cryogénique d'oxygenotherapie pourvu d'un dispositif selon l'invention ; - la figure 2 est une vue en coupe du dispositif de la figure 1 dans un plan de coupe orthogonal au plan de coupe de la figure 1 ; et- Figure 1 is a schematic view in vertical section of the upper part of a cryogenic oxygen therapy tank provided with a device according to the invention; - Figure 2 is a sectional view of the device of Figure 1 in a section plane orthogonal to the section plane of Figure 1; and
- la figure 3 est une vue de côté du dispositif de la figure 2.- Figure 3 is a side view of the device of Figure 2.
Sur la figure 1 on a représenté un dispositif selon l'invention mis en place sur une bride de col 2 montée dans le col d'un réservoir cryogénique 3. Selon un aspect de l'invention, le dispositif selon l'invention comprend un sous-ensemble monobloc 1 réalisé en acier inoxydable moulé comprenant essentiellement une partie principale en forme de disque 4 ayant une surface inférieure transversale formant plan de joint 5 monté plaqué sur la bride 2 munie d'un joint annulaire 6. Le sous-ensemble 1 comporte une cheminée centrale 7 orthogonale au disque 4, sensiblement coaxiale à ce dernier, et définissant un passage central 8. Dans la partie principale 4 sont définis, avec des. bossages en saillie sur la face opposée au plan de joint 5, un premier canal transversal 9, un deuxième canal transversal 10 orthogonal au précédent et un troisième canal transversal 11 dans le plan du canal 10 et diamétralement opposé à ce dernier. Le canal 10 débouche à la partie inférieure du disque 4 par une cavité 12 tandis que le canal 11 débouche, lui, par une portion de canal 13 formée en partie dans un épaulement en saillie 14 où débouche également vers le bas le canal central 8. Le canal 9 débouche similairement vers le bas par une portion de canal formée dans un épaulement en saillie 15. Comme on le voit sur la figure 1 , à l'opposé du canal 9 est formé un canal axial 16 traversant le disque 4 recevant une pièce 17 permettant le raccordement électrique à une jauge capacitive de niveau 18.In Figure 1 there is shown a device according to the invention placed on a neck flange 2 mounted in the neck of a cryogenic tank 3. According to one aspect of the invention, the device according to the invention comprises a sub -one-piece assembly 1 made of molded stainless steel essentially comprising a main disc-shaped part 4 having a transverse lower surface forming a joint plane 5 mounted flat on the flange 2 provided with an annular seal 6. The sub-assembly 1 comprises a central chimney 7 orthogonal to the disc 4, substantially coaxial with the latter, and defining a central passage 8. In the main part 4 are defined, with. bosses projecting from the face opposite the joint plane 5, a first transverse channel 9, a second transverse channel 10 orthogonal to the previous one and a third transverse channel 11 in the plane of the channel 10 and diametrically opposite to the latter. The channel 10 opens out at the lower part of the disc 4 through a cavity 12 while the channel 11 opens out through a portion of channel 13 formed partly in a projecting shoulder 14 where the central channel 8 also opens downwards. The channel 9 similarly opens downwards through a channel portion formed in a projecting shoulder 15. As can be seen in FIG. 1, opposite the channel 9 is formed an axial channel 16 passing through the disc 4 receiving a part 17 allowing the electrical connection to a level capacitive gauge 18.
Le sous-ensemble monobloc 1 est monté sur la bride 2 par trois vis angulairement réparties (non représentées) et par une colonne 19 à extrémité inférieure filetée servant également, via une plaque support 20, à supporter un boîtier de vanne de contrôle de débit 21 , comme on le verra plus loin.The one-piece sub-assembly 1 is mounted on the flange 2 by three angularly distributed screws (not shown) and by a column 19 with a threaded lower end also serving, via a support plate 20, to support a flow control valve housing 21 , as we will see later.
Comme on le voit sur la figure 1 , en configuration assemblée, le canal 9 reçoit l'extrémité 22 amont d'un serpentin réchauffeur atmosphérique 23, tel que décrit dans la demande de brevet français FR 99 13617, la portion de canal dans l'épaulement 15 recevant l'extrémité d'un tube plongeur 24 s'etendant jusqu'au voisinage du fond du récipient intérieur du réservoir 3. De façon similaire, un tube plongeur 25 est monté dans l'extrémité inférieure du canal 8. Ce dernier est prolongé vers le haut par un évasement formé dans une tête de diamètre élargi 26 comportant un filetage extérieur 27 et recevant l'extrémité inférieure d'une borne de remplissage à clapet 28 maintenue en place sur la cheminée 7 par un écrou 29 coopérant avec le filetage 27.As can be seen in FIG. 1, in the assembled configuration, the channel 9 receives the upstream end 22 of an atmospheric heating coil 23, as described in French patent application FR 99 13617, the portion of channel in the shoulder 15 receiving the end of a dip tube 24 extending to the vicinity of the bottom of the inner container of the reservoir 3. Similarly, a dip tube 25 is mounted in the lower end of the channel 8. The latter is extended upwards by a flare formed in an enlarged diameter head 26 comprising an external thread 27 and receiving the lower end of a valve filling terminal 28 held in place on the chimney 7 by a nut 29 cooperating with the thread 27.
Au canal transversal 10 est raccordée l'extrémité amont d'un serpentin réchauffeur atmosphérique 30 dont l'extrémité aval est ^reliée au boîtier de vanne 21 susmentionné. Le canal 11 est quant à lui relié extérieurement à une vanne de mise à l'air (non représentée).To the transverse channel 10 is connected the upstream end of an atmospheric heating coil 30, the downstream end of which is connected to the aforementioned valve housing 21. The channel 11 is in turn connected externally to a vent valve (not shown).
La mise en œuvre du dispositif décrit est la suivante. : le remplissage en fluide liquéfié, du réservoir 3 s'opère à une basse pression, proche de 3 bar, via la borne à clapet 28, le canal 8 et le tube 25, le volume intérieur du réservoir étant, pendant cette opération, en communication avec l'atmosphère ambiante via les canaux 13 et 11 et la vanne de mise à l'air libre en aval de ce dernier. Typiquement un tube de trop plein (non représenté) s'etendant dans le réservoir, est brasé dans le canal 13 pour limiter la hauteur de liquide entreposé dans le réservoir. En exploitation, le prélèvement du fluide cryogénique sous forme liquide contenu dans le réservoir, pressurisé par le ciel gazeux dans le réservoir, s'effectue par le tube 24, le canal 9 et le serpentin 23 avant d'atteindre le boîtier de vanne à contrôle de débit 21 fournissant, par sa sortie 31 , un flux gazeux à débit contrôlé vers un utilisateur. Le prélèvement de la phase gazeuse dans le réservoir 3 s'effectue par le canal 10 et le serpentin 30 avant de rejoindre le boîtier de vanne21 , pourvu d' au moins une soupape de surpression de sécurité 32.The implementation of the device described is as follows. : the filling with liquefied fluid, of the reservoir 3 takes place at a low pressure, close to 3 bar, via the valve terminal 28, the channel 8 and the tube 25, the interior volume of the reservoir being, during this operation, in communication with the ambient atmosphere via channels 13 and 11 and the vent valve downstream of the latter. Typically an overflow tube (not shown) extending in the tank, is brazed in the channel 13 to limit the height of liquid stored in the tank. In operation, the cryogenic fluid in the liquid form contained in the tank, pressurized by the gaseous air in the tank, is drawn up by the tube 24, the channel 9 and the coil 23 before reaching the flow control valve housing 21 supplying, via its outlet 31, a gaseous flow with controlled flow to a user. The sampling of the gaseous phase in the reservoir 3 is carried out through the channel 10 and the coil 30 before reaching the valve housing 21, provided with at least one safety pressure relief valve 32.
Comme on le voit sur la figure 1 , le canal de sortie de liquide 9 est placé à l'opposé du passage 16 de montage de la sonde 18 de façon que le soutirage de liquide s'effectue avec un minimum de transmission de frigories à la traversée 17 de la sonde 18. De façon similaire, comme on le voit sur la figure 2, le canal 11 se prolonge hors du disque 4 par une extension tubulaire transversale 33 permettant d'éloigner la vanne de mise à l'air libre du disque 4 et donc d'éviter une mise en froid excessive de cette vanne.As seen in Figure 1, the liquid outlet channel 9 is placed opposite the passage 16 for mounting the probe 18 so that the withdrawal of liquid is carried out with a minimum transmission of frigories to the passage 17 of the probe 18. Similarly, as seen in FIG. 2, the channel 11 is extended outside the disc 4 by a transverse tubular extension 33 making it possible to move the vent valve away from the disc 4 and therefore to avoid excessive cooling of this valve.
Dans un mode de réalisation préféré, le sous-ensemble 1 est réalisé par moulage à la cire perdue, ce qui supprime quasiment les reprises d'usinage, à partir d'acier inoxydable comprenant au moins 16% de chrome et au moins 10% de nickel, typiquement un lopin en acier inoxydable du type 316L qui, après coulée, représente un taux de ferrite supérieur à 2%, typiquement entre 2 et 6%, qui est obtenu par un apport de chrome dans le bain de métal en fusion. In a preferred embodiment, the subassembly 1 is produced by lost wax molding, which virtually eliminates the need for machining, from stainless steel comprising at least 16% of chromium and at least 10% of nickel, typically a piece of stainless steel of the 316L type which, after casting, represents a ferrite content greater than 2%, typically between 2 and 6%, which is obtained by adding chromium to the bath of molten metal.

Claims

REVENDICATIONS
1. Dispositif d'obturation et de raccordement à des canalisations externes d'un réservoir (3) de fluide cryogénique, caractérisé en ce qu'il comporte un sous-ensemble monobloc (1) en acier inoxydable moulé définissant au moins deux canaux de passage de fluide (8-11).1. Device for closing off and connecting to external pipes of a cryogenic fluid reservoir (3), characterized in that it comprises a monobloc sub-assembly (1) in molded stainless steel defining at least two passage channels fluid (8-11).
2. Dispositif selon la revendication 1 , caractérisé en ce que le sous- ensemble, moulé (1) définit au moins trois conduits de passage de fluide (8-11).2. Device according to claim 1, characterized in that the molded sub-assembly (1) defines at least three fluid passage conduits (8-11).
3. Dispositif selon la revendication 1 ou la revendication 2, caractérisé en ce que le sous-ensemble moulé (1 ) présente une partie principale généralement en forme de disque (4) et ayant une face formant un plan de joint3. Device according to claim 1 or claim 2, characterized in that the molded sub-assembly (1) has a main part generally in the form of a disc (4) and having a face forming a joint plane
(5).(5).
4. Dispositif selon la revendication 3, caractérisé en ce qu'au moins un canal (9,10,11 ) débouche latéralement par rapport à la partie principale (4). 4. Device according to claim 3, characterized in that at least one channel (9,10,11) opens laterally relative to the main part (4).
5. Dispositif selon la revendication 3 ou la revendication 4 , caractérisé en ce qu'un canal (8) s'étend orthogonalement par rapport à la partie principale (4).5. Device according to claim 3 or claim 4, characterized in that a channel (8) extends orthogonally relative to the main part (4).
6. Dispositif selon la revendication 5, caractérisé en ce que le canal s'etendant orthogonalement (8) est formé en partie par une partie tubulaire en saillie (7).6. Device according to claim 5, characterized in that the orthogonally extending channel (8) is formed in part by a projecting tubular part (7).
7. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comporte un passage traversant (16) de montage -d'une traversée (17) de jauge de niveau (18).7. Device according to one of the preceding claims, characterized in that it comprises a through passage (16) for mounting -a crossing (17) level gauge (18).
8. Dispositif selon l'une des revendications 2 à 7, caractérisé en ce que le sous-ensemble moulé (1) définit un passage central de remplissage (8), un passage de sortie de liquide (9) et un passage de sortie de gaz (10).8. Device according to one of claims 2 to 7, characterized in that the molded sub-assembly (1) defines a central filling passage (8), a liquid outlet passage (9) and an outlet passage of gas (10).
9. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le sous-ensemble (1) est réalisé par moulage à la cire perdue d'un acier inoxydable austénitique comprenant au moins 16% de chrome et au moins 10% de nickel ayant, en phase liquide, un taux de ferrite supérieur à 2%, de préférence n'excédant pas 6%. 9. Device according to one of the preceding claims, characterized in that the sub-assembly (1) is produced by lost wax molding of an austenitic stainless steel comprising at least 16% chromium and at least 10% nickel having, in the liquid phase, a ferrite content greater than 2%, preferably not exceeding 6%.
10. Réservoir cryogénique équipé d'un dispositif selon l'une des revendications précédentes.10. Cryogenic tank equipped with a device according to one of the preceding claims.
11. Réservoir selon la revendication 10 équipé d'un dispositif selon la revendication 8, caractérisé en ce qu'il comporte deux réchauffeurs atmosphériques (23,30) reliés respectivement aux passages de sortie de liquide (9) et de gaz (10).11. Tank according to claim 10 equipped with a device according to claim 8, characterized in that it comprises two atmospheric heaters (23.30) connected respectively to the liquid outlet passages (9) and gas (10).
12. Réservoir selon la revendication 10 ou la revendication 11, caractérisé, en ce qu'il contient de l'oxygène liquide médical. 12. Tank according to claim 10 or claim 11, characterized in that it contains medical liquid oxygen.
PCT/FR2001/001391 2001-05-07 2001-05-07 Sealing and connection device for the external pipes of a cryogenic liquid tank WO2002090822A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BR0106873-3A BR0106873A (en) 2001-05-07 2001-05-07 Device for plugging and connecting to external pipelines of a cryogenic fluid reservoir and reservoir equipped with such a device
US10/049,238 US6732535B2 (en) 2001-05-07 2001-05-07 Device for closing and connecting to external conduits a reservoir of cryogenic fluid, and reservoir provided with such a device
PCT/FR2001/001391 WO2002090822A1 (en) 2001-05-07 2001-05-07 Sealing and connection device for the external pipes of a cryogenic liquid tank
CA002382828A CA2382828A1 (en) 2001-05-07 2001-05-07 Device for stopping and connecting to the external pipes of a tank of cryogenic fluid and tank fitted with such a device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2001/001391 WO2002090822A1 (en) 2001-05-07 2001-05-07 Sealing and connection device for the external pipes of a cryogenic liquid tank

Publications (1)

Publication Number Publication Date
WO2002090822A1 true WO2002090822A1 (en) 2002-11-14

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Application Number Title Priority Date Filing Date
PCT/FR2001/001391 WO2002090822A1 (en) 2001-05-07 2001-05-07 Sealing and connection device for the external pipes of a cryogenic liquid tank

Country Status (3)

Country Link
BR (1) BR0106873A (en)
CA (1) CA2382828A1 (en)
WO (1) WO2002090822A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4956975A (en) * 1989-08-17 1990-09-18 Gustafson Keith W Shutoff valve for cryogenic liquid storage tank
US5711354A (en) * 1993-04-28 1998-01-27 Advanced Delivery & Chemical Systems, Inc. Level control systems for high purity chemical delivery systems
US5869746A (en) * 1996-04-26 1999-02-09 Honda Giken Kogyo Kabushiki Kaisha Piping for compressed fuel in motorcar
US5975121A (en) * 1995-06-08 1999-11-02 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Tap/pressure regulator assembly for a gas bottle and a gas bottle equipped with such an assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4956975A (en) * 1989-08-17 1990-09-18 Gustafson Keith W Shutoff valve for cryogenic liquid storage tank
US5711354A (en) * 1993-04-28 1998-01-27 Advanced Delivery & Chemical Systems, Inc. Level control systems for high purity chemical delivery systems
US5975121A (en) * 1995-06-08 1999-11-02 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Tap/pressure regulator assembly for a gas bottle and a gas bottle equipped with such an assembly
US5869746A (en) * 1996-04-26 1999-02-09 Honda Giken Kogyo Kabushiki Kaisha Piping for compressed fuel in motorcar

Also Published As

Publication number Publication date
CA2382828A1 (en) 2002-11-07
BR0106873A (en) 2003-04-08

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