EP3875832A1 - Device for holding an inside tank of a cryogenic liquid transport tank - Google Patents

Device for holding an inside tank of a cryogenic liquid transport tank Download PDF

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Publication number
EP3875832A1
EP3875832A1 EP21159747.1A EP21159747A EP3875832A1 EP 3875832 A1 EP3875832 A1 EP 3875832A1 EP 21159747 A EP21159747 A EP 21159747A EP 3875832 A1 EP3875832 A1 EP 3875832A1
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EP
European Patent Office
Prior art keywords
tank
cone
outer casing
base
inner tank
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.)
Pending
Application number
EP21159747.1A
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German (de)
French (fr)
Inventor
Daniel Magyar
Laurent Magyar
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Magyar SA
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Magyar SA
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Filing date
Publication date
Application filed by Magyar SA filed Critical Magyar SA
Publication of EP3875832A1 publication Critical patent/EP3875832A1/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/08—Vessels not under pressure with provision for thermal insulation by vacuum spaces, e.g. Dewar flask
    • 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
    • F17C2201/03—Orientation
    • F17C2201/035—Orientation with substantially horizontal main axis
    • 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
    • F17C2201/054—Size medium (>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
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/014—Suspension means
    • 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
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/014—Suspension means
    • F17C2203/018—Suspension means by attachment at the neck
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0308—Radiation shield
    • F17C2203/032—Multi-sheet layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0391—Thermal insulations by vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/0157—Details of mounting arrangements for transport
    • F17C2205/0161—Details of mounting arrangements for transport with wheels
    • 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
    • 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
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • 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
    • F17C2260/012—Reducing weight
    • 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
    • F17C2260/03—Dealing with losses
    • F17C2260/031—Dealing with losses due to heat transfer
    • F17C2260/033—Dealing with losses due to heat transfer by enhancing insulation
    • 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
    • F17C2270/0171—Trucks

Definitions

  • the present invention relates to the field of tanks and more particularly those intended for transporting cryogenic liquids by semi-trailers, trailers, carriers and wagons, or even by containers or swap bodies.
  • cryogenic liquids because of the temperature difference between the transported liquid and the ambient air is often of the order of 200 ° C, which requires thermal insulation of the tank.
  • the traditional solution for insulation is made by polyurethane materials or other combustible materials, however these are forbidden by ADR (A greement for the transport of goods D anger recipients by R oute) for products to - below -182 ° C.
  • the other solid materials, such as perlite, for the same insulation performance often require a greater thickness, hence a greater total mass. Given the limit of the total authorized rolling mass, any additional mass consequently leads to a reduction in the mass of transportable product. Even for light products such as methane, too thick insulation would exceed the authorized road clearance.
  • a device consisting of two fixed studs and two movable studs arranged in the lower part.
  • the pads consist of a stack of welded cones to limit conduction.
  • the resistance over time is not controllable.
  • the object of the invention is to respond to these problems and to guarantee reliable maintenance of the inner tank while allowing recovery of the longitudinal expansion, in particular for tanks installed on semi-trailers, trailers, carriers, wagons, containers or swap bodies.
  • the cryogenic liquid transport tank comprises an inner tank, of substantially cylindrical shape, arranged in an outer casing, the inner reservoir and the outer casing are coaxial with axis X, said inner reservoir being connected to the outer casing by a support device, it is characterized in that the support device consists of a single cone of axis X located in the center of the tank and connecting the inner tank to the outer casing.
  • the support device consists of a single cone of axis X located in the center of the tank and connecting the inner tank to the outer casing.
  • the cone comprises a base and a top, the top being fixed to the center of the inner reservoir.
  • the base will preferably be placed behind the top, above the running gear of the tank to take up the forces.
  • the tank comprises pipes for filling the tank in the center of the tank.
  • the pipes are thus arranged close to the fixed part of the reservoir and are therefore little affected by the contraction of the reservoir.
  • this position of the cone limits the differential expansions and the stresses in the inter-wall piping, because, in effect, the further the drainages are from the fixed point, the more they are subjected to the contractions of the wall of the tank.
  • the cone has holes. They make it possible to limit the thermal flows between the inner tank and the outer casing while reducing the weight of the tank.
  • the cone is fixed by welding.
  • the cone has a length greater than 400mm, preferably 500mm. This makes it possible to limit the heat flow between the tank and the casing.
  • the cone will preferably have a length of 1.10m.
  • the cone has a wall thickness of between 3 and 10mm.
  • the thickness of the cone must guarantee sufficient strength of the inner tank.
  • the tank is a semi-trailer.
  • the outer casing consists of two parts each with a half-shell and a bottom.
  • the assembly of the reservoir in the casing is thus easier, each part being less heavy to move than the complete casing.
  • a first part of the outer casing is longer than a second part. This in the case where the base of the cone is offset from the center of the tank.
  • the assembly can be done horizontally or vertically.
  • the front corresponds to the front 10 of the tank 1 on the coupling side and the rear to the rear 11 of the tank 1 where the wheels 5 of the semi are located. -trailer.
  • the tank 1 is a cylindrical double-walled tank consisting of an inner tank 2 and an outer casing 3, the assembly is oriented along a substantially horizontal axis X.
  • a cone 4 is fixed to the center 12 of the tank 1 between the tank 2 and the casing 3.
  • the cone 4 comprises a base 40 and a top 41.
  • the base 40 has a larger diameter than the top 41.
  • the base 40 is connected to the casing 3 and offset towards the rear of the tank 1, while the top 41 is connected to the center of the tank 2.
  • the middle of the cone is disposed at the center 12 of the tank or that the base 40 is fixed to the center 12 of the tank 1 without departing from the scope of the present invention.
  • the cone 4 being connected in a fixed manner between the tank 2 and the casing 3 next to the pipes 6, it makes it possible to limit as much as possible the stresses in these pipes 6 during the expansion of the tank 2.
  • the base 40 being connected near the running gear 5, it facilitates the recovery of loads from the tank 2.
  • the cone 4 is pierced with bores 42 in order to lighten it and to limit the thermal conduction between the inner tank 2 and the outer casing 3.
  • the bores 42 are round and of identical size but they could be of shape and size. different.
  • the tank 1 has a space between the walls of the tank 2 and the casing 3. When loading the cryogenic liquid into the tank 2, the latter will retract due to the cold while the casing 3 will remain at ambient temperature. and keep the same dimensions.
  • the inner tank 2 being fixedly connected to the outer casing 3, the space between them will increase, but as only the central part is fixed, the movement of the ends will have no effect on the casing 2 or on the piping 6.
  • the outer casing 3 consists of two parts 30 and 31 each with a half-shell, respectively 300 and 310, and a bottom, respectively 301 and 311.
  • first part 31 of the casing 3 is longer than the second part 30.
  • This first part 31 is, in the example illustrated, arranged at the front 10 of the tank while the second part 30 is arranged at the 'rear 11.
  • the top 41 of the cone 4 is placed in the center of the tank 2, therefore the base 40 is offset from the center 12 of the tank 1.
  • the two parts of the casing 3 are therefore of sizes different.
  • the middle of the cone 4 is at the center 12 of the tank, its base 40 and its top 41 are arranged symmetrically with respect to this center 12 and the two parts 30 and 31 of the casing 3 are the same size.
  • the assembly can be carried out flat (horizontally) or vertically without departing from the scope of the present invention.
  • the advantage of having an envelope in two parts is that these two parts are easier to handle whatever the chosen assembly.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

La citerne (1) de transport de liquide cryogénique selon l'invention comprend un réservoir intérieur (2), de forme sensiblement cylindrique, disposé dans une enveloppe extérieure (3), le réservoir intérieur (2) et l'enveloppe extérieure (3) sont coaxiaux d'axe X, ledit réservoir intérieur (2) étant relié à l'enveloppe extérieure (3) par un dispositif de soutien, elle est caractérisée en ce que le dispositif de soutien est constitué d'un unique cône (4) d'axe X situé au centre (12) de la citerne (1) et reliant le réservoir intérieur (2) à l'enveloppe extérieure (3). Il n'y a qu'un unique point fixe, résistant et fiable et aucun appui mobile, ce dernier est plus compliqué à concevoir et il est impossible de contrôler son usure éventuelle au fil du temps. En plus sa position centrale permet de réduire le porte-à-faux et d'équilibrer les charges de chaque côté, et de réduire ainsi les efforts engendrés.The cryogenic liquid transport tank (1) according to the invention comprises an inner tank (2), of substantially cylindrical shape, arranged in an outer casing (3), the inner tank (2) and the outer casing (3) are coaxial with axis X, said inner reservoir (2) being connected to the outer casing (3) by a support device, it is characterized in that the support device consists of a single cone (4) d 'X axis located at the center (12) of the tank (1) and connecting the inner tank (2) to the outer casing (3). There is only one fixed point, resistant and reliable and no mobile support, the latter is more complicated to design and it is impossible to control its possible wear over time. In addition, its central position makes it possible to reduce the overhang and to balance the loads on each side, and thus to reduce the forces generated.

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

La présente invention se rapporte au domaine des citernes et plus particulièrement celles destinées à transporter des liquides cryogéniques par semi-remorques, remorques, porteurs et wagons, voire par conteneurs ou caisses mobiles.The present invention relates to the field of tanks and more particularly those intended for transporting cryogenic liquids by semi-trailers, trailers, carriers and wagons, or even by containers or swap bodies.

Les transports de liquides cryogéniques, à cause de la différence de température entre le liquide transporté et l'air ambiant est souvent de l'ordre de 200°C, ce qui nécessite d'isoler thermiquement la citerne. La solution traditionnelle d'isolation est faite par des matériaux de type polyuréthane ou d'autres matériaux combustibles, cependant ceux-ci sont interdits par l'ADR (Accord pour le transport des marchandises Dangereuses par la Route) pour les produits au-dessous de -182°C. Les autres matériaux solides, tels que la perlite, pour une même performance d'isolation nécessitent souvent une épaisseur plus importante d'où une masse totale plus importante. Etant donné la limite de la masse totale roulante autorisée, toute masse supplémentaire entraine par conséquence une réduction de la masse de produit transportable. Même pour des produits légers comme le méthane, l'isolation trop épaisse dépasserait du gabarit routier autorisé.The transport of cryogenic liquids, because of the temperature difference between the transported liquid and the ambient air is often of the order of 200 ° C, which requires thermal insulation of the tank. The traditional solution for insulation is made by polyurethane materials or other combustible materials, however these are forbidden by ADR (A greement for the transport of goods D angereuses by R oute) for products to - below -182 ° C. The other solid materials, such as perlite, for the same insulation performance often require a greater thickness, hence a greater total mass. Given the limit of the total authorized rolling mass, any additional mass consequently leads to a reduction in the mass of transportable product. Even for light products such as methane, too thick insulation would exceed the authorized road clearance.

Pour ces différentes raisons, les citernes à simple parois avec isolation rigide sont maintenant abandonnées pour les gaz liquides à basse température.For these various reasons, single-walled tanks with rigid insulation are now being abandoned for low temperature liquid gases.

Aujourd'hui, le marché est donc aux citernes à double parois entre lesquelles on réalise un vide d'air poussé pour empêcher le transfert thermique par conduction. Ces citernes sont constituées d'un réservoir intérieur dans lequel est transporté le liquide cryogénique et une enveloppe extérieure. Cependant avec 200°C de différence entre les parois, le rayonnement est très important. Il est géré soit en remplissant l'inter-paroi de perlite (solution assez lourde et nécessitant une épaisseur d'inter-paroi assez importante pour limiter le flux conductif), soit par une isolation en multi couches (MLI Multi Layer Insulation) comme celle utilisées autour des satellites. La solution vide d'air poussé et MLI est aujourd'hui la solution la plus performante du marché.Today, the market is therefore for double-walled tanks between which a high air vacuum is created to prevent heat transfer by conduction. These tanks consist of an inner tank in which the cryogenic liquid is transported and an outer casing. However with 200 ° C difference between the walls, the radiation is very important. It is managed either by filling the inter-wall with perlite (a fairly heavy solution requiring a sufficiently large inter-wall thickness to limit the conductive flow), or by a multi-layer insulation (MLI Multi Layer Insulation) such as that used around satellites. The high air vacuum and MLI solution is today the most efficient solution on the market.

ARRIERE-PLAN TECHNOLOGIQUE DE L'INVENTIONTECHNOLOGICAL BACKGROUND OF THE INVENTION

L'utilisation de citerne à double parois soulève le problème du soutien du réservoir intérieur dans l'enveloppe extérieure. Ces supports doivent répondre à trois problèmes principaux :

  • Soutenir la masse du réservoir intérieur par rapport à la gravité, mais aussi les autres accélérations qu'il peut rencontrer sur la route ;
  • Résister à la dilatation thermique : l'enveloppe extérieure reste à température ambiante tandis que le réservoir intérieur peut rétrécir jusqu'à environ 7 mm au niveau du diamètre et de 40 mm en longueur ;
  • Avoir le moins possible de déperdition thermique par conduction (utilisation de matériaux peu conducteurs, faibles sections et grande longueur).
The use of double-walled cisterns raises the problem of supporting the inner tank in the outer shell. These supports must address three main problems:
  • Support the mass of the inner tank with respect to gravity, but also the other accelerations that it may encounter on the road;
  • Resist thermal expansion: the outer shell remains at room temperature while the inner tank can shrink up to about 7 mm in diameter and 40 mm in length;
  • Have the least possible heat loss by conduction (use of poorly conductive materials, small sections and great length).

Il est connu de prévoir un cône disposé à l'arrière et une pièce coulissante à l'avant. La pièce coulissante à l'avant permet au réservoir intérieur de coulisser par rapport à l'enveloppe extérieure lors d'une dilatation thermique. Cependant cette solution nécessite que la partie froide coulisse dans une fausse cloison percée. La partie froide allant se contracter en refroidissant, du jeu risque d'apparaitre dans la liaison ce qui va, à terme, entraîner de l'usure voire plus grave de la fatigue et une rupture possible.It is known to provide a cone arranged at the rear and a sliding part at the front. The sliding piece at the front allows the inner tank to slide relative to the outer shell during thermal expansion. However, this solution requires the cold part to slide in a false pierced partition. As the cold part contracts as it cools, there is a risk that play will appear in the connection which will eventually lead to wear or even more serious fatigue and possible breakage.

On connait également un dispositif constitué de deux plots fixes et deux plots mobiles disposés en partie basse. Les plots sont constitués d'un empilement de cônes soudés pour limiter la conduction. Cependant il est difficile de maitriser les jeux : il en faut assez pour permettre le mouvement, mais pas trop car cela engendrerait des chocs indésirables. La tenue dans le temps n'est pas contrôlable.A device is also known consisting of two fixed studs and two movable studs arranged in the lower part. The pads consist of a stack of welded cones to limit conduction. However, it is difficult to master the games: you need enough to allow movement, but not too much because that would generate unwanted shocks. The resistance over time is not controllable.

Il est aussi utilisé des chaines pour suspendre la cuve intérieure, ou encore de la poser sur des cales.It is also used chains to suspend the inner tank, or to put it on wedges.

Cependant ces systèmes ne sont pas suffisamment fiables, le réservoir intérieur n'étant pas suffisamment maintenu.However, these systems are not sufficiently reliable, the interior tank not being sufficiently maintained.

RESUME DE L'INVENTIONSUMMARY OF THE INVENTION

L'objet de l'invention est de répondre à ces problèmes et de garantir un maintien fiable du réservoir intérieur tout en permettant une récupération de la dilatation longitudinale en particulier pour les citernes installées sur des semi-remorques, des remorques, des porteurs, des wagons, des conteneurs ou des caisses mobiles.The object of the invention is to respond to these problems and to guarantee reliable maintenance of the inner tank while allowing recovery of the longitudinal expansion, in particular for tanks installed on semi-trailers, trailers, carriers, wagons, containers or swap bodies.

La citerne de transport de liquide cryogénique selon l'invention comprend un réservoir intérieur, de forme sensiblement cylindrique, disposé dans une enveloppe extérieure, le réservoir intérieur et l'enveloppe extérieure sont coaxiaux d'axe X, ledit réservoir intérieur étant relié à l'enveloppe extérieure par un dispositif de soutien, elle est caractérisée en ce que le dispositif de soutien est constitué d'un unique cône d'axe X situé au centre de la citerne et reliant le réservoir intérieur à l'enveloppe extérieure. Il n'y a qu'un unique point fixe, résistant et fiable et aucun appui mobile. Un appui mobile est plus compliqué à concevoir et il est impossible de contrôler son usure éventuelle au fil du temps. En plus la position centrale du cône permet de réduire le porte-à-faux et d'équilibrer les charges de chaque côté, et de réduire ainsi les efforts engendrés.The cryogenic liquid transport tank according to the invention comprises an inner tank, of substantially cylindrical shape, arranged in an outer casing, the inner reservoir and the outer casing are coaxial with axis X, said inner reservoir being connected to the outer casing by a support device, it is characterized in that the support device consists of a single cone of axis X located in the center of the tank and connecting the inner tank to the outer casing. There is only one fixed, resistant and reliable point and no movable support. A mobile support is more complicated to design and it is impossible to control its possible wear over time. In addition, the central position of the cone makes it possible to reduce the overhang and to balance the loads on each side, and thus to reduce the forces generated.

Avantageusement, le cône comprend une base et un sommet, le sommet étant fixé au centre du réservoir intérieur. Dans ce cas, la base sera de préférence disposée en arrière du sommet, au-dessus du train roulant de la citerne pour reprendre les efforts.Advantageously, the cone comprises a base and a top, the top being fixed to the center of the inner reservoir. In this case, the base will preferably be placed behind the top, above the running gear of the tank to take up the forces.

Selon une caractéristique particulière, la citerne comprend des tuyaux de remplissage du réservoir au centre de la citerne. Les tuyaux sont donc ainsi disposés à proximité de la partie fixe du réservoir et sont donc peu impactés par la contraction du réservoir. En effet, cette position du cône limite les dilatations différentielles et les contraintes dans les tuyauteries inter-paroi, car effet, plus les vidanges sont éloignées du point fixe, plus elles sont soumises aux contractions de la paroi du réservoir.According to one particular characteristic, the tank comprises pipes for filling the tank in the center of the tank. The pipes are thus arranged close to the fixed part of the reservoir and are therefore little affected by the contraction of the reservoir. In fact, this position of the cone limits the differential expansions and the stresses in the inter-wall piping, because, in effect, the further the drainages are from the fixed point, the more they are subjected to the contractions of the wall of the tank.

Avantageusement, le cône présente des perçages. Ils permettent de limiter les flux thermiques entre le réservoir intérieur et l'enveloppe extérieure tout en allégeant la citerne.Advantageously, the cone has holes. They make it possible to limit the thermal flows between the inner tank and the outer casing while reducing the weight of the tank.

Avantageusement, le cône et fixé par soudage.Advantageously, the cone is fixed by welding.

Selon une disposition particulière, le cône a une longueur supérieure à 400mm, de préférence 500mm. Cela permet de limiter le flux thermique entre le réservoir et l'enveloppe. Le cône aura de préférence une longueur de 1,10m.According to a particular arrangement, the cone has a length greater than 400mm, preferably 500mm. This makes it possible to limit the heat flow between the tank and the casing. The cone will preferably have a length of 1.10m.

Avantageusement, le cône a une paroi d'épaisseur comprise entre 3 et 10mm. La citerne ne comportant qu'un seul point d'appui au lieu de deux, l'épaisseur du cône doit garantir une tenue suffisante du réservoir intérieur.Advantageously, the cone has a wall thickness of between 3 and 10mm. As the tank has only one fulcrum instead of two, the thickness of the cone must guarantee sufficient strength of the inner tank.

Selon une autre disposition, la citerne est une semi-remorque.According to another arrangement, the tank is a semi-trailer.

Selon une caractéristique particulière, l'enveloppe extérieure est constituée de deux parties avec chacune une demi-virole et un fond. Le montage du réservoir dans l'enveloppe est ainsi plus aisé, chaque partie étant moins lourde à déplacer que l'enveloppe complète.According to one particular characteristic, the outer casing consists of two parts each with a half-shell and a bottom. The assembly of the reservoir in the casing is thus easier, each part being less heavy to move than the complete casing.

Selon une disposition particulière, une première partie de l'enveloppe extérieure est plus longue qu'une deuxième partie. Ceci dans le cas où la base du cône est décalée par rapport au centre de la citerne.According to a particular arrangement, a first part of the outer casing is longer than a second part. This in the case where the base of the cone is offset from the center of the tank.

L'invention concerne également un procédé de montage d'une citerne avec au moins une des caractéristiques précédentes, il est caractérisé en ce qu'il comprend les étapes suivantes :

  • Montage et soudure du sommet du cône sur le réservoir intérieur,
  • Positionnement d'une partie de l'enveloppe extérieure sur le réservoir intérieur et soudage sur la base du cône.
  • Positionnement de l'autre partie de l'enveloppe extérieure sur le réservoir intérieure et soudage sur la base du cône pour refermer l'enveloppe extérieure.
The invention also relates to a method of mounting a tank with at least one of the preceding characteristics, it is characterized in that it comprises the following steps:
  • Assembly and welding of the top of the cone on the inner tank,
  • Positioning of part of the outer casing on the inner tank and welding on the base of the cone.
  • Positioning of the other part of the outer casing on the inner tank and welding on the base of the cone to close the outer casing.

Le montage pourra être fait horizontalement ou verticalement.The assembly can be done horizontally or vertically.

L'invention et ses différentes applications seront mieux comprises à la lecture de la description qui suit et à l'examen des figures qui l'accompagnent données uniquement à titre d'exemple.The invention and its various applications will be better understood on reading the following description and on examining the accompanying figures, which are given purely by way of example.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

  • [Fig. 1] est une vue d'une semi-remorque selon l'invention ;[ Fig. 1 ] is a view of a semi-trailer according to the invention;
  • [Fig. 2] est une vue en perspective du réservoir de la figure 1 :[ Fig. 2 ] is a perspective view of the reservoir of the figure 1 :
  • [Fig. 3] est une vue de côté du réservoir ;[ Fig. 3 ] is a side view of the tank;
  • [Fig. 4] est une vue de côté du réservoir avec une demi-enveloppe ;[ Fig. 4 ] is a side view of the tank with a half-shell;
  • [Fig. 5] est une vue de coté de la citerne[ Fig. 5 ] is a side view of the tank
  • [Fig. 6] est une perspective de l'enveloppe externe en deux parties.[ Fig. 6 ] is a perspective of the two-part outer shell.
DESCRIPTION DETAILLEEDETAILED DESCRIPTION

Dans la suite de la description on considèrera que l'avant correspond à l'avant 10 de la citerne 1 du côté de l'attelage et l'arrière à l'arrière 11 de la citerne 1 où sont situées les roues 5 de la semi-remorque.In the remainder of the description, it will be considered that the front corresponds to the front 10 of the tank 1 on the coupling side and the rear to the rear 11 of the tank 1 where the wheels 5 of the semi are located. -trailer.

Comme on peut le voir à la figure 1, la citerne 1 est une citerne cylindrique à double paroi constituée d'un réservoir intérieur 2 et d'une enveloppe extérieure 3, l'ensemble est orienté selon un axe X sensiblement horizontal. Un cône 4 est fixé au centre 12 de la citerne 1 entre le réservoir 2 et l'enveloppe 3. Le cône 4 comprend une base 40 et un sommet 41. La base 40 a un diamètre plus grand que le sommet 41. La base 40 est reliée à l'enveloppe 3 et décalée vers l'arrière de la citerne 1, tandis que le sommet 41 est relié au centre du réservoir 2.As can be seen at the figure 1 , the tank 1 is a cylindrical double-walled tank consisting of an inner tank 2 and an outer casing 3, the assembly is oriented along a substantially horizontal axis X. A cone 4 is fixed to the center 12 of the tank 1 between the tank 2 and the casing 3. The cone 4 comprises a base 40 and a top 41. The base 40 has a larger diameter than the top 41. The base 40 is connected to the casing 3 and offset towards the rear of the tank 1, while the top 41 is connected to the center of the tank 2.

Il est possible de prévoir que le milieu du cône soit disposé au centre 12 de la citerne ou que la base 40 soit fixé au centre 12 de la citerne 1 sans sortir du cadre de la présente inventionIt is possible to provide that the middle of the cone is disposed at the center 12 of the tank or that the base 40 is fixed to the center 12 of the tank 1 without departing from the scope of the present invention.

Le cône 4 étant relié de façon fixe entre le réservoir 2 et l'enveloppe 3 à côté des tuyauteries 6, il permet de limiter au maximum les contraintes dans ces tuyaux 6 lors des dilatations du réservoir 2.The cone 4 being connected in a fixed manner between the tank 2 and the casing 3 next to the pipes 6, it makes it possible to limit as much as possible the stresses in these pipes 6 during the expansion of the tank 2.

Le base 40 étant relié à proximité du train roulant 5, elle facilite la reprise des charges du réservoir 2.The base 40 being connected near the running gear 5, it facilitates the recovery of loads from the tank 2.

Le cône 4 est troué de perçages 42 afin de l'alléger et de limiter la conduction thermique entre le réservoir intérieur 2 et l'enveloppe extérieure 3. Ici les perçages 42 sont ronds et de taille identique mais ils pourraient être de forme et de taille différente.The cone 4 is pierced with bores 42 in order to lighten it and to limit the thermal conduction between the inner tank 2 and the outer casing 3. Here the bores 42 are round and of identical size but they could be of shape and size. different.

La citerne 1 présente un espace entre les parois du réservoir 2 et de l'enveloppe 3. Lors du chargement du liquide cryogénique dans le réservoir 2 celui-ci va se rétracter à cause du froid tandis que l'enveloppe 3 va rester à température ambiante et garder les mêmes dimensions. Le réservoir intérieur 2 étant relié de façon fixe à l'enveloppe extérieure 3, l'espace entre eux va augmenter, mais comme seule la partie centrale est fixe, le mouvement des extrémités n'aura aucune conséquence sur l'enveloppe 2 ou sur la tuyauterie 6.The tank 1 has a space between the walls of the tank 2 and the casing 3. When loading the cryogenic liquid into the tank 2, the latter will retract due to the cold while the casing 3 will remain at ambient temperature. and keep the same dimensions. The inner tank 2 being fixedly connected to the outer casing 3, the space between them will increase, but as only the central part is fixed, the movement of the ends will have no effect on the casing 2 or on the piping 6.

Le cône 4 étant placé au centre 12 de la citerne 1, l'enveloppe extérieure 3 est constituée de deux parties 30 et 31 avec chacune une demi-virole, respectivement 300 et 310, et un fond, respectivement 301 et 311.The cone 4 being placed in the center 12 of the tank 1, the outer casing 3 consists of two parts 30 and 31 each with a half-shell, respectively 300 and 310, and a bottom, respectively 301 and 311.

On peut voir sur les figures 4 à 6 que la première partie 31 de l'enveloppe 3 est plus longue que la deuxième partie 30. Cette première partie 31 est, dans l'exemple illustré, disposé à l'avant 10 de la citerne tandis que la deuxième partie 30 est disposée à l'arrière 11.We can see on the figures 4 to 6 that the first part 31 of the casing 3 is longer than the second part 30. This first part 31 is, in the example illustrated, arranged at the front 10 of the tank while the second part 30 is arranged at the 'rear 11.

Dans l'exemple illustré, le sommet 41 du cône 4 est placé au centre du réservoir 2, de ce fait la base 40 est décalé par rapport au centre 12 de la citerne 1. Les deux parties de l'enveloppe 3 sont donc de tailles différentes.In the example illustrated, the top 41 of the cone 4 is placed in the center of the tank 2, therefore the base 40 is offset from the center 12 of the tank 1. The two parts of the casing 3 are therefore of sizes different.

Si, dans une autre configuration, le milieu du cône 4 est au centre 12 de la citerne, sa base 40 et son sommet 41 sont disposé de façon symétrique par rapport à ce centre 12 et les deux parties 30 et 31 de l'enveloppe 3 sont de taille identique.If, in another configuration, the middle of the cone 4 is at the center 12 of the tank, its base 40 and its top 41 are arranged symmetrically with respect to this center 12 and the two parts 30 and 31 of the casing 3 are the same size.

Le montage de la citerne 1 selon le mode illustré est fait de la façon suivante :

  • On monte et on soude le sommet 41 du cône 4 sur le milieu du réservoir intérieur 2 (fig. 3) ;
  • On insert une première partie (ici 30) de l'enveloppe extérieure 3 sur le réservoir intérieur 2 et on le soude à la base 40 du cône 4 (figure 4) ;
  • On insert une deuxième partie (ici 31) de l'enveloppe extérieure 3 dans le réservoir intérieur 2 et on le soude à la base 40 du cône 4 (figure 5).
The assembly of tank 1 according to the illustrated mode is carried out as follows:
  • We go up and we weld the top 41 of the cone 4 on the middle of the inner tank 2 ( fig. 3 );
  • A first part (here 30) of the outer casing 3 is inserted on the inner tank 2 and it is welded to the base 40 of the cone 4 ( figure 4 );
  • A second part (here 31) of the outer casing 3 is inserted into the inner tank 2 and it is welded to the base 40 of the cone 4 ( figure 5 ).

Le montage peut être réalisé à plat (horizontalement) ou verticalement sans sortir du cadre de la présente invention. L'avantage d'avoir une enveloppe en deux parties est que ces deux parties sont plus faciles à manipuler quel que soit le montage choisi.The assembly can be carried out flat (horizontally) or vertically without departing from the scope of the present invention. The advantage of having an envelope in two parts is that these two parts are easier to handle whatever the chosen assembly.

Claims (10)

Citerne (1) de transport de liquide cryogénique comprenant un train roulant et un réservoir intérieur (2), de forme sensiblement cylindrique, disposé dans une enveloppe extérieure (3), le réservoir intérieur (2) et l'enveloppe extérieure (3) sont coaxiaux d'axe X, ledit réservoir intérieur (2) étant relié à l'enveloppe extérieure (3) par un dispositif de soutien, caractérisée en ce que le dispositif de soutien est constitué d'un unique cône (4) d'axe X situé au centre (12) de la citerne (1), comprenant une base (40) et un sommet (41), reliant le réservoir intérieur (2) à l'enveloppe extérieure (3) et que la base (40) est disposée en arrière du sommet (41) au-dessus du train roulant de la citerne (1).Cistern (1) for transporting cryogenic liquid comprising a running gear and an inner tank (2), of substantially cylindrical shape, arranged in an outer casing (3), the inner reservoir (2) and the outer casing (3) are coaxial of axis X, said inner reservoir (2) being connected to the outer casing (3) by a support device, characterized in that the support device consists of a single cone (4) of axis X located at the center (12) of the tank (1), comprising a base (40) and a top (41), connecting the inner tank (2) to the outer shell (3) and that the base (40) is arranged behind the top (41) above the running gear of the tank (1). Citerne (1) selon la revendication 1 caractérisée en ce que le cône et que le sommet (41) est fixé au centre du réservoir intérieur.Tank (1) according to Claim 1, characterized in that the cone and that the top (41) is fixed to the center of the inner tank. Citerne (1) selon une des revendications précédentes caractérisée en ce qu'elle comprend des tuyaux (6) de remplissage du réservoir (2) disposé au centre (12) de la citerne (1).Tank (1) according to one of the preceding claims, characterized in that it comprises pipes (6) for filling the tank (2) arranged in the center (12) of the tank (1). Citerne (1) selon une des revendications précédentes caractérisée en ce que le cône (4) présente des perçages (42).Tank (1) according to one of the preceding claims, characterized in that the cone (4) has bores (42). Citerne (1) selon une des revendications précédentes caractérisée en ce que le cône (4) a une longueur supérieure à 400mm.Tank (1) according to one of the preceding claims, characterized in that the cone (4) has a length greater than 400mm. Citerne (1) selon une des revendications précédentes caractérisée en ce que le cône (4) a une paroi d'épaisseur comprise entre 3 et 10mm.Tank (1) according to one of the preceding claims, characterized in that the cone (4) has a wall thickness of between 3 and 10mm. Citerne (1) selon une des revendications précédentes caractérisée en ce que la citerne (1) est une semi-remorque.Tank (1) according to one of the preceding claims, characterized in that the tank (1) is a semi-trailer. Citerne (1) selon une des revendications précédentes caractérisée en ce que l'enveloppe extérieure (3) est constituée de deux parties (30, 31) avec chacune une demi-virole (300, 310) et un fond (301, 311).Tank (1) according to one of the preceding claims, characterized in that the outer casing (3) consists of two parts (30, 31) each with a half-shell (300, 310) and a bottom (301, 311). Citerne (1) selon la revendication précédente caractérisée en ce qu'une première partie (31) est plus longue qu'une deuxième partie (30).Tank (1) according to the preceding claim, characterized in that a first part (31) is longer than a second part (30). Procédé de montage d'une citerne (1) selon une des revendications précédentes caractérisée en ce qu'il comprend les étapes suivantes : - Montage et soudure du sommet (41) du cône (4) sur le réservoir intérieur (2), - Positionnement d'une partie (30, 31) de l'enveloppe extérieure (3) sur le réservoir intérieur (2) et soudage sur la base (40) du cône (4) en arrière du sommet (41) au-dessus du train roulant de la citerne (1). - Positionnement de l'autre partie (31, 30) de l'enveloppe extérieure (3) sur le réservoir intérieur (2) et soudage sur la base (40) cône (4) pour refermer l'enveloppe extérieure (3). Method of mounting a tank (1) according to one of the preceding claims, characterized in that it comprises the following steps: - Assembly and welding of the top (41) of the cone (4) on the inner tank (2), - Positioning of a part (30, 31) of the outer casing (3) on the inner tank (2) and welding on the base (40) of the cone (4) behind the top (41) above the running gear of the tank (1). - Positioning of the other part (31, 30) of the outer casing (3) on the inner tank (2) and welding on the base (40) cone (4) to close the outer casing (3).
EP21159747.1A 2020-03-02 2021-02-26 Device for holding an inside tank of a cryogenic liquid transport tank Pending EP3875832A1 (en)

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FR2002070A FR3107701B1 (en) 2020-03-02 2020-03-02 Device for holding an inner tank of a cryogenic liquid transport tank

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP4293271A1 (en) * 2022-06-17 2023-12-20 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Cryogenic tank

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GB254220A (en) * 1925-10-24 1926-07-01 Berndorfer Metallwarenfabrik Double walled sheet metal barrel or the like
US3037657A (en) * 1958-03-03 1962-06-05 Robert S Hampton Conical support for jacketed vessel
FR1547246A (en) * 1967-05-24 1968-11-22 Process Engineering Inc Cryogenic vessels and supporting structures for said vessels
US5141013A (en) * 1990-10-10 1992-08-25 Montana Sulphur & Chemical Co. Fluid containment apparatus
WO2002065015A2 (en) * 2001-02-13 2002-08-22 African Oxygen Limited Transportation of liquefiable petroleum gas
WO2005121631A1 (en) * 2004-05-10 2005-12-22 L'Air Liquide Société Anonyme à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés Georges Claude Cryogenic fuel tank and use thereof in a motor vehicle
EP2689963A1 (en) * 2012-07-26 2014-01-29 Linde Aktiengesellschaft Integrated bogie frame and tank structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB254220A (en) * 1925-10-24 1926-07-01 Berndorfer Metallwarenfabrik Double walled sheet metal barrel or the like
US3037657A (en) * 1958-03-03 1962-06-05 Robert S Hampton Conical support for jacketed vessel
FR1547246A (en) * 1967-05-24 1968-11-22 Process Engineering Inc Cryogenic vessels and supporting structures for said vessels
US5141013A (en) * 1990-10-10 1992-08-25 Montana Sulphur & Chemical Co. Fluid containment apparatus
WO2002065015A2 (en) * 2001-02-13 2002-08-22 African Oxygen Limited Transportation of liquefiable petroleum gas
WO2005121631A1 (en) * 2004-05-10 2005-12-22 L'Air Liquide Société Anonyme à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés Georges Claude Cryogenic fuel tank and use thereof in a motor vehicle
EP2689963A1 (en) * 2012-07-26 2014-01-29 Linde Aktiengesellschaft Integrated bogie frame and tank structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4293271A1 (en) * 2022-06-17 2023-12-20 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Cryogenic tank
FR3136828A1 (en) * 2022-06-17 2023-12-22 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Cryogenic tank

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FR3107701B1 (en) 2022-09-02

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