DE1802227A1 - Storage tank for liquefied gas - Google Patents

Description

Dr. Hans-Heinrich Willrath 62 Wiesbaden

Dr. Dieter Weber ΪΤβΤιΖ

PATENT Attorneys Telephone (oem) S7 a? 20th

Telegram address: WILLPATENT ΐ / ϋΟΘ

Postal checks Frankfurt / Msin 6763 es j λ en I.

Bank: Dresdner Bank AG. Wiesbaden ΟθΓΙΟ 1504 account no. »76 807

L'Air Liquide, Sooiete Anonyme pour 1'Etude et 1'Exploitation des Prooedes Georges Claude, 75, Quai d'Orsay, Paris

Storage tank for liquefied gas

Priority : from October 19, 1967 in France under PV No. 125 O66

The invention relates to a container for gas which is liquefied at low temperature, with a liquid gas

containing inner tight container, lines for the like

the exhaust, the filling and exhaustion of the air and with an outer jacket, the space between the two Jackets is under vacuum.

It is known to use containers consisting of two rigid jackets with substantially parallel walls, which are kept at a distance from one another by means of flexible holders to avoid contractions as a result of cooling to take account of the container at the moment of its filling,

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This results in the use of elliptical, pseudo-elliptical or spherical shell-shaped bottoms for the two jackets. These floors require access to special shaping processes such as AusdrUokung, driving or Pulling measures, soft mowing, etc. For the same reason the pipelines leading to the container must have flexible elements in order to allow the contractions to play freely to allow and avoid cracking or breakage. Such rigid jackets generally exist of cylinders, which are closed off at each end by spherical shells and require careful production, precise machining, lengthy and expensive shaping, where the processed metal is subject to cold deformation, which then requires heat treatment, whereby the production time is extended even more «,

The invention has the object of simplifying the manufacturing processes for liquid gas containers, the overall risk of cracking of the components under the influence of contraction as a result of cooling being reduced by limiting the number of components exposed to deformation. In the prior art, namely, molding and softening processes were used which are wholly or partially eliminated in the manufacture of containers according to the invention.

According to the invention, the lines are .starr, firmly with .den

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connected to the two coats and thus form their own supports or are supported in connection with stiffeners. At least one of the mantle zones that are on the plane each support lie are subject to elastic deformation able to.

Such an arrangement simplifies, in particular, the passage of the gas lines through the jacket walls. Since the Zones exposed to deformations consist of simple, flexible, flat metal sheets that do not need to be thick may require special processing, apart from the perforation for the implementation of cables the time savings in production can be seen to be considerable.

According to a particularly advantageous embodiment of the invention, the two shells of two coaxial rigid cylinders which are closed at their two ends by thin ä floor panels with the ability to elastically deform. The latter are held at a distance from one another by the lines or stiffeners that are attached to these floors.

According to a modification, only one of the jackets is equipped with floors capable of elastic deformation.

The following description of exemplary embodiments based on

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the drawing allows a better understanding of the practice of the invention.

Fig. 1 is a schematic longitudinal section through a Low pressure container according to the invention;

Fig. 2 shows schematically a longitudinal section through a container for medium or high pressure according to one embodiment the invention.

In Figure 1, a low-pressure container for 1 to 3 bar is shown absolute. The inner and outer casing consists of two cylinder nozzles 1 and 2, which are closed at their ends by thin base plates 3 and h . These thin floor panels withstand compressive stresses caused by the insulating vacuum because they are stiffened on the one hand by an air line 5 and on the other hand by a discharge and filling line 6. Since these floors are thin and deformable, the contraction of the lines 5 and 6 forming the supports does not result in any abnormal constriction, although they are firmly attached to the floors. The floors 3 and 4 consist of deformable thin disks which are welded at 7 to the cylinders 1 and 2 and at 8 to the support lines.

After filling, the liquid gas 9 is under a gas phase 10. Between the two jackets there is a Isolation vacuum 11 with or without radiation protection screens or

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- 5 insulating powders.

Figure 2 shows a container for medium pressure or high pressure from 3 to 30 fear absolute. The inner jacket has the usual shape and is made up of a cylinder 1 and 2 rigid floors 3 which form a pressure vessel. The outer jacket consists of a cylinder 2 and thin deformable floor panels 4. Only floors 3 and 4 on the lower part are penetrated by lines 5 and 6 for the air and the filling. A stiffener 12 is between the upper Floors 3 and 4 attached. Lines 5 and 6 and the stiffener 12, all of which are rigid, transmit the compressive forces due to the insulating vacuum to the floor slabs of the outer jacket are exerted on the inner jacket. By means of the outer jacket, no removal forces whatsoever are transmitted. The contraction of the supports and pipelines does not result in abnormal necking because the bottoms of the Outer jacket are thin and deformable.

A frustoconical resting on its large base Ring 13 carries the inner jacket by means of G-guide pieces 14. The lower bottom 4 and the cylinder 2 of the outer shell

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are welded along a horizontal 15 of the frustoconical ring 13. The other components are welded together at 7 and 8.

If necessary, there is one between the two jackets under vacuum insulation 11, which as required

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may or may not be provided with a radiation protection screen or insulating powder. After the filling is located the liquid phase 9 is below the gas phase 10.

It goes without saying that details of the embodiments described can be modified _; without leaving the scope of the invention.

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Claims (3)

- 7 PATENT CLAIMS 1. Storage container for liquefied gas at a very low temperature, consisting of a dense inner jacket containing the liquefied gas, which is equipped with a vent ·; Filling and air ducts is provided, and of an outer casing, wherein the space between the two coats is under vacuum, characterized in that the lines rigidly% and are firmly connected to the two shells and form for themselves or in conjunction with stiffening struts , and at least one jacket zone at the level of each support is capable of elastic deformation. 2. A container according to claim 1, characterized in that the two shells consist of two rigid coaxial cylinders, the thin at both ends of which are capable of g elastic deformation bottom plates are complete, from each other by the bottom plates fixed lines or stiffeners in distance being held. 3. Container according to claim i, characterized in that only the one jacket with elastic deformation equipped floor. 909820/1110