EP1412670B1 - Method for making a tank containing compressed gas and resulting tank - Google Patents

Method for making a tank containing compressed gas and resulting tank Download PDF

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Publication number
EP1412670B1
EP1412670B1 EP02779598A EP02779598A EP1412670B1 EP 1412670 B1 EP1412670 B1 EP 1412670B1 EP 02779598 A EP02779598 A EP 02779598A EP 02779598 A EP02779598 A EP 02779598A EP 1412670 B1 EP1412670 B1 EP 1412670B1
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EP
European Patent Office
Prior art keywords
envelope
tank
metallic
compressed gas
composite material
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.)
Expired - Lifetime
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EP02779598A
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German (de)
French (fr)
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EP1412670A1 (en
Inventor
Gérard Goffre
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Giat Industries SA
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Giat Industries SA
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Publication date
Priority claimed from FR0110222A external-priority patent/FR2828265B1/en
Priority claimed from FR0111274A external-priority patent/FR2829222B3/en
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP1412670A1 publication Critical patent/EP1412670A1/en
Application granted granted Critical
Publication of EP1412670B1 publication Critical patent/EP1412670B1/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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F17C1/04—Protecting sheathings
    • F17C1/06—Protecting sheathings built-up from wound-on bands or filamentary material, e.g. wires
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0604—Liners
    • 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
    • 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
    • F17C2203/0658—Synthetics
    • F17C2203/0663—Synthetics in form of fibers or filaments
    • F17C2203/0673—Polymers
    • 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
    • F17C2209/2154—Winding
    • 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
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • 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
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • 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
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • 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
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/018—Adapting dimensions
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles

Definitions

  • the technical sector of the present invention is that tanks intended to contain compressed gas, by example of natural gas to equip vehicles automobiles.
  • LPG liquefied petroleum gas
  • CNG compressed natural gas
  • Natural gas is usually methane.
  • the liquefied petroleum gas is generally at a pressure of 30.10 5 Pa and the natural gas is compressed at a pressure of the order of 300.10 5 Pa.
  • the technologies used in these two types of tanks are not the same.
  • CNG tanks are designed to withstand the very high pressure and are most often metallic.
  • US-A-5443578 proposes a reservoir steel metal. It is well known that these tanks Although resistant to pressure are very heavy, of the order 100 kg for a capacity of 100 liters. This mass imposes a particular implementation study on the vehicle of tourism because their assembly supposes a reinforcement of the structure. It reduces the number of passengers and the load useful and it can disrupt the road behavior of the vehicle. However, this type of reservoir remains competitive on the cost plan. This tank can only be used difficult on passenger vehicles without particular.
  • WO9851962 proposes to improve this kind of tank by providing a reservoir comprising an envelope sufficient internal resistance and an outer casing honeycomb. This reservoir is penalizing in terms of clutter.
  • U.S. Patent 5,822,8308 considered the closest prior art, discloses a method of manufacturing a high performance tank for pressurized gas.
  • This process consists of making a metal liner and cover by an envelope made by a wrapped Filament.
  • the reservoir thus produced is intended for equip spacecraft and satellites.
  • the cost of launch of such gear being very high it is important to make tanks of very small mass.
  • the process manufacturing process therefore concerns tanks whose quotient weight * volume / mass is highest and implementing liner with high ductility and modulus of elasticity E Student.
  • the liner must be made from a titanium alloy.
  • This method of realization has the disadvantage of implementing a Titanium liner which is expensive but has the advantage of having a reduced mass. of carbon of diameter less than mm possibly associated to other fibers and impregnated with an epoxy resin.
  • motor vehicle we mean the vehicles of any type operating with this kind of fuel, such as private or commercial vehicles, buses, trucks, construction machinery, etc.
  • the envelope internal has a thickness of the order of mm.
  • the filament winding is made from a wire of carbon impregnated with an epoxy resin, possibly combined with wires of another nature.
  • the subject of the invention is the use in a vehicle automobile, a tank of the common type of US 5,822,838.
  • the reservoir has a diameter internal of the order of 350 mm and a length of 1400 mm.
  • a first advantage of the process according to the invention resides in the fact that the manufacture of the tank requires that the implementation of conventional technologies of welding and filament laying.
  • Another advantage lies in the fact that the reservoir manufactured can be incorporated into a vehicle without particular modification.
  • FIG. 1 there is shown the liner 1 of a reservoir, that is, the inner metal casing mainly ensures tightness.
  • This liner 1 includes a trunk 2 of generally cylindrical shape and two caps hemispherical 3 and 4, these three elements being realized in stainless steel.
  • the trunk 2 is made from a stainless steel sheet with a thickness of mm it is welded edge to edge longitudinally.
  • the caps 3 and 4 are identical and made by stamping a sheet stainless steel with a thickness of the order of mm.
  • One soda then the two caps 3 and 4 on the trunk 2.
  • the caps are provided with tips 5 and 6 which can be threaded. These tips 5 and 6 allow to fix the liner 2 on the device winding on the one hand and to integrate the tank into a vehicle.
  • One of the tips can be hollow to communicate with the inside of the body to allow filling and the power supply of the vehicle.
  • FIG. 2 shows a reservoir 7 consisting of the liner 1 and an outer envelope 8.
  • This envelope 8 is produced as previously explained by winding a carbon thread impregnated with a resin, for example an epoxy resin .
  • the carbon wire may optionally be associated with fibers of another nature.
  • the winding operation is in itself conventional and it is not necessary to describe it in detail.
  • the reservoir 7 is fixed on the winding machine by means of the end pieces and this machine is programmed in a conventional manner to produce a satisfactory winding of the thread on the liner both at the level of the body 2 and the caps 5 and 6.
  • Carbon is a known type of wire having conventional characteristics in the production of filamentary coils.
  • the envelope 8 is intimately linked to the inner casing and bears on the end caps.
  • Such an embodiment makes it possible to guarantee the resistance of the reservoir to an internal service pressure of the compressed gas greater than 200 ⁇ 10 5 Pa.
  • the wire used is preferably made of carbon, but it would be possible to use a wire of another nature, for example a metallic wire, a mineral or synthetic.
  • the mass is the order of 40 Kg.
  • the tank according to the invention can be used without only to fuel the vehicles with natural gas, but it may also contain compressed air, hydrogen, and any other gas used in compressed form.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Packages (AREA)

Abstract

The invention relates to a manufacturing process for a compressed gas tank, for example natural gas intended for a motor vehicle, of the type incorporating a metallic inner envelope 1 and an outer envelope 8 of a composite material. The metallic envelope 1 is made from stainless steel sheets comprising a cylindrical trunk 2 and two hemispherical or elliptical end caps 3, 4 welded together and in that an outer envelope 8 is made around said inner envelope by filament winding of a composite material. The inner envelope 1 has a thickness of around a mm. The filament winding is made using carbon filament that may be associated with other fibres, impregnated with an epoxy type resin. Application to CNG tanks for vehicles.

Description

Le secteur technique de la présente invention est celui des réservoirs destinés à contenir du gaz comprimé, par exemple du gaz naturel pour équiper les véhicules automobiles.The technical sector of the present invention is that tanks intended to contain compressed gas, by example of natural gas to equip vehicles automobiles.

Les véhicules fonctionnant au gaz se répandent de plus en plus dans le monde et on connaít des réservoirs renfermant du gaz de pétrole liquéfié (GPL) et des réservoirs contenant du gaz naturel comprimé (GNV). Le gaz naturel est généralement du méthane. Le gaz de pétrole liquéfié est généralement à une pression de 30.105 Pa et le gaz naturel est comprimé à une pression de l'ordre de 300.105 Pa. Les technologies utilisées dans ces deux types de réservoirs ne sont pas les mêmes.Gas-powered vehicles are spreading more and more around the world and there are known tanks containing liquefied petroleum gas (LPG) and tanks containing compressed natural gas (CNG). Natural gas is usually methane. The liquefied petroleum gas is generally at a pressure of 30.10 5 Pa and the natural gas is compressed at a pressure of the order of 300.10 5 Pa. The technologies used in these two types of tanks are not the same.

De nombreuses réalisations de réservoirs GNV ont été proposées. Ces réservoirs sont conçus pour résister à la pression très élevée et sont le plus souvent métalliques.Many achievements of CNG tanks have been proposed. These tanks are designed to withstand the very high pressure and are most often metallic.

Ainsi, le brevet US-A-5443578 propose un réservoir métallique en acier. Il est bien connu que ces réservoirs bien que résistant à la pression sont très lourds, de l'ordre de 100 kg pour une contenance de 100 litres. Cette masse impose une étude d'implantation particulière sur le véhicule de grand tourisme car leur montage suppose un renforcement de la structure. Il réduit le nombre de passagers et la charge utile et il peut perturber le comportement routier du véhicule. Toutefois ce type de réservoir reste compétitif sur le plan du coût. Ce réservoir ne peut être utilisé que difficilement sur les véhicules de tourisme sans aménagement particulier.Thus, US-A-5443578 proposes a reservoir steel metal. It is well known that these tanks Although resistant to pressure are very heavy, of the order 100 kg for a capacity of 100 liters. This mass imposes a particular implementation study on the vehicle of tourism because their assembly supposes a reinforcement of the structure. It reduces the number of passengers and the load useful and it can disrupt the road behavior of the vehicle. However, this type of reservoir remains competitive on the cost plan. This tank can only be used difficult on passenger vehicles without particular.

Le brevet WO9851962 propose d'améliorer ce genre de réservoir en prévoyant un réservoir comprenant une enveloppe interne de résistance suffisante et une enveloppe externe en nid d'abeilles. Ce réservoir est pénalisant sur le plan de l'encombrement.WO9851962 proposes to improve this kind of tank by providing a reservoir comprising an envelope sufficient internal resistance and an outer casing honeycomb. This reservoir is penalizing in terms of clutter.

Le document DE-19935516 décrit un réservoir constitué d'une enveloppe interne métallique et d'une enveloppe externe en matériau renforcé par des fibres. La réalisation concrète de ce réservoir n'est pas précisée. On sait aussi que ce genre de réservoir peut être fabriqué à partir de liners en aluminium monoblocs obtenus par des procédés de fluotournage et/ou repoussage dont le coût est élevé.
Le brevet WO9412396 décrit un réservoir dont l'enveloppe interne est constituée d'un polymère et dont l'enveloppe externe est constituée par une matrice de fibres non métalliques imprégnées de résine thermodurcissable. Ce réservoir présente l'inconvénient de ne pas être complètement étanche et d'être d'un coût élevé mais l'avantage d'avoir une masse réduite.Document DE-19935516 describes a reservoir consisting of a metal inner envelope and an outer envelope made of fiber-reinforced material. The concrete realization of this reservoir is not specified. It is also known that this type of tank can be made from monobloc aluminum liners obtained by spinning and / or spinning processes whose cost is high.
WO9412396 discloses a reservoir whose inner casing is made of a polymer and whose outer casing is constituted by a matrix of non-metallic fibers impregnated with thermosetting resin. This reservoir has the disadvantage of not being completely sealed and of high cost but the advantage of having a reduced mass.

Le brevet US 5 822 838, considéré comme art antérieur le plus proche, divulgue un procédé de fabrication d'un réservoir de hautes performances pour gaz sous pression. Ce procédé consiste à réaliser un liner métallique et à la recouvrir par une enveloppe réalisée par un enroulé filamentaire. Le réservoir ainsi réalisé est destiné à équiper les engins spatiaux et les satellites. Le coût de lancement de tels engins étant très élevé, il est important de réaliser des réservoirs de masse très réduite. Le procédé de fabrication concerne donc des réservoirs dont le quotient poids*volume/masse est des plus élevé et mettant en oeuvre liner ayant une forte ductilité et un module d'élasticité E élevé. Pour répondre à ces critères, le liner doit donc être réalisé à partir d'un alliage de titane. Ce procédé de réalisation présente l'inconvénient de mettre en oeuvre un liner en titane dont le coût élevé mais l'avantage d'avoir une masse réduite. de carbone de diamètre inférieur au mm éventuellement associé à d'autres fibres et imprégné d'une résine du type époxy.U.S. Patent 5,822,838, considered the closest prior art, discloses a method of manufacturing a high performance tank for pressurized gas. This process consists of making a metal liner and cover by an envelope made by a wrapped Filament. The reservoir thus produced is intended for equip spacecraft and satellites. The cost of launch of such gear being very high it is important to make tanks of very small mass. The process manufacturing process therefore concerns tanks whose quotient weight * volume / mass is highest and implementing liner with high ductility and modulus of elasticity E Student. To meet these criteria, the liner must be made from a titanium alloy. This method of realization has the disadvantage of implementing a Titanium liner which is expensive but has the advantage of having a reduced mass. of carbon of diameter less than mm possibly associated to other fibers and impregnated with an epoxy resin.

Par véhicule automobile, on entend les véhicules de tout type fonctionnant avec ce genre de carburant, tels les véhicules particuliers ou utilitaires, les bus, les camions, les engins de chantier, etc...By motor vehicle, we mean the vehicles of any type operating with this kind of fuel, such as private or commercial vehicles, buses, trucks, construction machinery, etc.

Selon une caractéristique de l'invention, l'euveloppe interne présente une épaisseur de l'ordre du mm.According to one characteristic of the invention, the envelope internal has a thickness of the order of mm.

Selon une autre caractéristique de l'invention, l'enroulement filamentaire est réalisé à partir d'un fil de carbone imprégné d'une résine du type époxy, éventuellement combiné à des fils d'une autre nature.According to another characteristic of the invention, the filament winding is made from a wire of carbon impregnated with an epoxy resin, possibly combined with wires of another nature.

Selon encore une autre caractéristique de l'invention, on rapporte par soudage au moins un embout fileté, deux embouts plus particulièrement, à la base des calottes hémisphériques ou elliptiques. According to yet another characteristic of the invention, reports by welding at least one threaded end, two end pieces more particularly, at the base of the hemispherical caps or elliptical.

L'invention a pour objet l'utilisation dans un véhicule automobile, d'un réservoir du type commun de US 5 822 838.The subject of the invention is the use in a vehicle automobile, a tank of the common type of US 5,822,838.

Avantageusement, le réservoir présente un diamètre interne de l'ordre de 350 mm et une longueur de 1400 mm.Advantageously, the reservoir has a diameter internal of the order of 350 mm and a length of 1400 mm.

Un tout premier avantage du procédé selon l'invention réside dans le fait que la fabrication du réservoir ne nécessite que la mise en oeuvre de technologies classiques de soudage et de pose de filament.A first advantage of the process according to the invention resides in the fact that the manufacture of the tank requires that the implementation of conventional technologies of welding and filament laying.

Un autre avantage réside dans le fait que le réservoir fabriqué peut être incorporé dans un véhicule sans modification particulière.Another advantage lies in the fact that the reservoir manufactured can be incorporated into a vehicle without particular modification.

D'autres caractéristiques, détails et avantages de l'invention ressortiront plus clairement de la description donnée ci-après à titre indicatif en relation avec des dessins dans lesquels :

  • la figure 1 est une vue extérieure de l'enveloppe métallique, et
  • la figure 2 est une coupe du réservoir.
Other features, details and advantages of the invention will emerge more clearly from the description given below as an indication in relation to drawings in which:
  • FIG. 1 is an external view of the metal casing, and
  • Figure 2 is a section of the tank.

Sur la figure 1, on a représenté le liner 1 d'un réservoir, c'est-à-dire l'enveloppe métallique interne qui assure principalement l'étanchéité. Ce liner 1 comprend un tronc 2 de forme globalement cylindrique et deux calottes hémisphériques 3 et 4, ces trois éléments étant réalisés en acier inoxydable. Le tronc 2 est réalisé à partir d'une feuille d'acier inox d'une épaisseur de l'ordre du mm que l'on soude bord à bord longitudinalement. Les calottes 3 et 4 sont identiques et réalisées par emboutissage d'une feuille d'acier inox d'une épaisseur de l'ordre du mm. On soude ensuite les deux calottes 3 et 4 sur le tronc 2. Les calottes sont munies des embouts 5 et 6 qui peuvent être filetés. Ces embouts 5 et 6 permettent de fixer le liner 2 sur l'appareil de bobinage d'une part et d'intégrer le réservoir dans un véhicule. Un des embouts peut être creux pour communiquer avec l'intérieur du corps pour permettre le remplissage et l'alimentation du véhicule.In Figure 1, there is shown the liner 1 of a reservoir, that is, the inner metal casing mainly ensures tightness. This liner 1 includes a trunk 2 of generally cylindrical shape and two caps hemispherical 3 and 4, these three elements being realized in stainless steel. The trunk 2 is made from a stainless steel sheet with a thickness of mm it is welded edge to edge longitudinally. The caps 3 and 4 are identical and made by stamping a sheet stainless steel with a thickness of the order of mm. One soda then the two caps 3 and 4 on the trunk 2. The caps are provided with tips 5 and 6 which can be threaded. These tips 5 and 6 allow to fix the liner 2 on the device winding on the one hand and to integrate the tank into a vehicle. One of the tips can be hollow to communicate with the inside of the body to allow filling and the power supply of the vehicle.

On voit donc tout l'intérêt d'un liner réalisé selon le procédé de l'invention. Il n'est fait appel qu'à des procédés de soudage et d'emboutissage classiques qui ne nécessitent aucune adaptation particulière de l'outil industriel. Ce liner procure un gain de masse et un volume utile plus important qu'un liner acier. Enfin, le coût de ce liner est très abordable.So we see all the interest of a liner made according to the method of the invention. Only processes are used conventional welding and stamping that does not require no particular adaptation of the industrial tool. This liner provides more weight gain and more useful volume important than a steel liner. Finally, the cost of this liner is very affordable.

Sur la figure 2, on a représenté un réservoir 7 constitué du liner 1 et d'une enveloppe externe 8. Cette enveloppe 8 est réalisée comme expliqué antérieurement par bobinage d'un fil de carbone imprégné d'une résine, par exemple une résine époxy. Le fil de carbone peut éventuellement être associé à des fibres d'une autre nature. L'opération de bobinage est en elle-même classique et il n'est pas nécessaire de la décrire en détail. Le réservoir 7 est fixé sur la machine de bobinage par l'intermédiaire des embouts et cette machine est programmée de manière classique pour réaliser un enroulement satisfaisant du fil sur le liner tant au niveau du corps 2 que des calottes 5 et 6. Le fil de carbone est un fil de type connu présentant des caractéristiques classiques dans la réalisation d'enroulés filamentaires. Sur la figure, on voit que l'enveloppe 8 est intimement liée à l'enveloppe interne et prend appui sur les embouts. Une telle réalisation permet de garantir la tenue du réservoir à une pression interne de service du gaz comprimé supérieure à 200.105 Pa. Le fil utilisé est préférentiellement en carbone mais on pourrait utiliser un fil d'une autre nature par exemple un fil métallique, minéral ou synthétique.FIG. 2 shows a reservoir 7 consisting of the liner 1 and an outer envelope 8. This envelope 8 is produced as previously explained by winding a carbon thread impregnated with a resin, for example an epoxy resin . The carbon wire may optionally be associated with fibers of another nature. The winding operation is in itself conventional and it is not necessary to describe it in detail. The reservoir 7 is fixed on the winding machine by means of the end pieces and this machine is programmed in a conventional manner to produce a satisfactory winding of the thread on the liner both at the level of the body 2 and the caps 5 and 6. Carbon is a known type of wire having conventional characteristics in the production of filamentary coils. In the figure, we see that the envelope 8 is intimately linked to the inner casing and bears on the end caps. Such an embodiment makes it possible to guarantee the resistance of the reservoir to an internal service pressure of the compressed gas greater than 200 × 10 5 Pa. The wire used is preferably made of carbon, but it would be possible to use a wire of another nature, for example a metallic wire, a mineral or synthetic.

Pour un réservoir présentant un diamètre interne de l'ordre de 350 mm et une longueur de 1400 mm, la masse est de l'ordre de 40 Kg.For a tank having an internal diameter of the order of 350 mm and a length of 1400 mm, the mass is the order of 40 Kg.

Le réservoir selon l'invention peut être utilisé non seulement pour alimenter en gaz naturel les véhicules, mais il peut renfermer également de l'air comprimé, de l'hydrogène, et tout autre gaz utilisé sous forme comprimée.The tank according to the invention can be used without only to fuel the vehicles with natural gas, but it may also contain compressed air, hydrogen, and any other gas used in compressed form.

Claims (2)

  1. Use of a compressed gas tank (7), for example natural gas intended for a motor vehicle, of the type incorporating a metallic inner envelope (1) and an outer envelope (8) of a composite material, the metallic envelope (1) being made from stainless steel sheets, and comprising a cylindrical trunk (2) and two hemispherical end caps (3, 4) welded together, the outer envelope (8) being around the said inner envelope made by carbon filament winding of a composite material, the diameter of said filament being under a mm and impregnated with an epoxy type resin in a vehicle.
  2. Use a tank according to Claim 1, wherein the tank has an inner diameter of around 350 mm and a length of 1400 mm.
EP02779598A 2001-07-31 2002-07-31 Method for making a tank containing compressed gas and resulting tank Expired - Lifetime EP1412670B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR0110222A FR2828265B1 (en) 2001-07-31 2001-07-31 PROCESS FOR PRODUCING A RESERVOIR CONTAINING COMPRESSED NATURAL GAS AND RESERVOIR THUS OBTAINED
FR0110222 2001-07-31
FR0111274A FR2829222B3 (en) 2001-08-30 2001-08-30 METHOD FOR PRODUCING A TANK CONTAINING COMPRESSED GAS AND RESERVOIR THUS OBTAINED
FR0111274 2001-08-30
PCT/FR2002/002751 WO2003012334A1 (en) 2001-07-31 2002-07-31 Method for making a tank containing compressed gas and resulting tank

Publications (2)

Publication Number Publication Date
EP1412670A1 EP1412670A1 (en) 2004-04-28
EP1412670B1 true EP1412670B1 (en) 2005-11-02

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EP02779598A Expired - Lifetime EP1412670B1 (en) 2001-07-31 2002-07-31 Method for making a tank containing compressed gas and resulting tank

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US (1) US20040238545A1 (en)
EP (1) EP1412670B1 (en)
AT (1) ATE308719T1 (en)
CA (1) CA2455405A1 (en)
DE (1) DE60207082T2 (en)
ES (1) ES2247385T3 (en)
WO (1) WO2003012334A1 (en)

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Also Published As

Publication number Publication date
WO2003012334A9 (en) 2004-02-19
CA2455405A1 (en) 2003-02-13
DE60207082D1 (en) 2005-12-08
EP1412670A1 (en) 2004-04-28
WO2003012334A1 (en) 2003-02-13
ATE308719T1 (en) 2005-11-15
ES2247385T3 (en) 2006-03-01
US20040238545A1 (en) 2004-12-02
DE60207082T2 (en) 2006-06-01

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