FR2753257A1 - Transfer line of cryogenic fluid with inner tube in outer sleeve - Google Patents
Transfer line of cryogenic fluid with inner tube in outer sleeve Download PDFInfo
- Publication number
- FR2753257A1 FR2753257A1 FR9611115A FR9611115A FR2753257A1 FR 2753257 A1 FR2753257 A1 FR 2753257A1 FR 9611115 A FR9611115 A FR 9611115A FR 9611115 A FR9611115 A FR 9611115A FR 2753257 A1 FR2753257 A1 FR 2753257A1
- Authority
- FR
- France
- Prior art keywords
- tube
- adsorbent
- inner tube
- line according
- cryogenic fluid
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/065—Arrangements using an air layer or vacuum using vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/141—Arrangements for the insulation of pipes or pipe systems in which the temperature of the medium is below that of the ambient temperature
Abstract
Description
LIGNE DE TRANSFERT DE FLUIDE CRYOGENIQUE
La présente invention concerne les lignes de transfert de fluide cryogénique, du type comprenant un tube intérieur de transfert de fluide, une enveloppe tubulaire extérieure entourant le tube et, dans l'espace sous vide entre le tube et l'enveloppe, un calorifugeage et, au moins localement, un volume d'adsorbant disposé entre le tube et le calorifugeage.CRYOGENIC FLUID TRANSFER LINE
The present invention relates to cryogenic fluid transfer lines, of the type comprising an interior fluid transfer tube, an outer tubular envelope surrounding the tube and, in the vacuum space between the tube and the envelope, thermal insulation and, at least locally, a volume of adsorbent disposed between the tube and the insulation.
Dans les techniques connues actuelles le tube intérieur et l'enveloppe sont réalisés en acier inoxydable et le volume d'adsorbant, permettant le maintien d'un vide convenable dans l'espace entre le tube et l'enveloppe, est constitué par des boîtes ou manchons d'adsorbant remplis de granulés d'adsorbant et montés sur le tube intérieur en différents endroits de la longueur de ce dernier. In current known techniques the inner tube and the envelope are made of stainless steel and the volume of adsorbent, allowing the maintenance of a suitable vacuum in the space between the tube and the envelope, consists of boxes or adsorbent sleeves filled with adsorbent granules and mounted on the inner tube at various places along its length.
Ces techniques connues présentent différents inconvénients. These known techniques have various drawbacks.
Ainsi, lors de la mise en froid du tube intérieur, celui-ci se contracte d'une valeur non négligeable (plus de 2 mm par mètre) alors que l'enveloppe, à température ambiante, conserve sa longueur initiale, ce qui impose d'équiper le tube intérieur d'au moins un soufflet compensateur métallique pour compenser la contraction du tube. Ce soufflet compensateur réduit la rigidité du tube et impose d'aménager un grand nombre d'entretoises de centrage entre l'enveloppe et le tube pour conserver la concentricité dece dernier. Thus, when the inner tube is cooled, it contracts by a non-negligible value (more than 2 mm per meter) while the envelope, at room temperature, retains its initial length, which requires d '' equip the inner tube with at least one metal compensating bellows to compensate for the contraction of the tube. This compensating bellows reduces the rigidity of the tube and makes it necessary to arrange a large number of centering spacers between the casing and the tube to maintain the latter's concentricity.
Le montage des boîtes à adsorbant entre des entretoises de centrage est une opération délicate, la boîte imposant de plus, comme le soufflet compensateur, des sections de calorifugeage différentes de celles des sections rectilignes du tube intérieur, le nombre d'entretoises de centrage imposant enfin une segmentation poussée du calorifugeage favorisant les sources de fuites thermiques. The mounting of the adsorbent boxes between centering spacers is a delicate operation, the box also imposing, like the compensating bellows, different insulation sections from those of the straight sections of the inner tube, the number of centering spacers finally imposing an advanced segmentation of thermal insulation favoring sources of thermal leaks.
La présente invention a pour objet de proposer une ligne de transfert de configuration simple et robuste, permettant une diminution des dimensions transversales de la ligne et autorisant des réductions de coût de fabrication et d'entretien notables. The present invention aims to provide a simple and robust configuration transfer line, allowing a reduction in the transverse dimensions of the line and allowing significant reductions in manufacturing and maintenance costs.
Pour ce faire, selon une caractéristique de l'invention, le tube intérieur est réalisé en un matériau métallique à faible coefficient de dilatation thermique, typiquement en alliage fer/nickel Invar, et le volume d'adsorbant est constitué par un gainage du tube intérieur réalisé avec des bandes de tissu adsorbant, typiquement en charbon actif. To do this, according to a characteristic of the invention, the inner tube is made of a metallic material with a low coefficient of thermal expansion, typically of an iron / nickel alloy Invar, and the volume of adsorbent consists of a cladding of the inner tube. produced with strips of adsorbent fabric, typically made of activated carbon.
Dans un tel agencement, la contraction au froid du tube intérieur est considérablement réduite (typiquement jusqu'à dix fois moins que celle d'un tube en acier inoxydable), ce qui permet de supprimer le soufflet compensateur, rendant ainsi le tube intérieur plus rigide et permettant de réduire le nombre d'entretoises de centrage. In such an arrangement, the cold contraction of the inner tube is considerably reduced (typically up to ten times less than that of a stainless steel tube), which eliminates the compensating bellows, thus making the inner tube more rigid and making it possible to reduce the number of centering spacers.
D'autre part, la suppression du soufflet compensateur et de la boîte à adsorbant donne un tube intérieur lisse de diamètre constant sur toute sa longueur, ce qui facilite grandement le calorifugeage du tube (segmentation en moins de tronçons) et permet de réduire considérablement le diamètre de l'enveloppe. On the other hand, the elimination of the compensating bellows and the adsorbent box gives a smooth inner tube of constant diameter over its entire length, which greatly facilitates the insulation of the tube (segmentation in fewer sections) and makes it possible to considerably reduce the envelope diameter.
De plus, l'adsorbant étant bobiné directement sur la surface du tube intérieur, il est plus rapidement refroidi lors de la mise en froid, ce qui rend l'adsorbant plus efficace dans les régimes transitoires et réduit donc les pertes à la mise en froid. In addition, the adsorbent being wound directly on the surface of the inner tube, it is cooled more quickly during cooling, which makes the adsorbent more effective in transient regimes and therefore reduces losses on cooling .
D'autres caractéristiques et avantages de la présente invention ressortiront de la description suivante d'un mode de réalisation, donné à titre illustratif mais nullement limitatif, faite en relation avec les dessins annexés, sur lesquels
- la figure 1 est une vue schématique en coupe longitudinale d'un tronçon de ligne de transfert selon l'invention; et
- la figure 2 est une vue en coupe longitudinale, partielle et agrandie, de la zone cerclée de la figure 1.Other characteristics and advantages of the present invention will emerge from the following description of an embodiment, given by way of illustration but in no way limiting, made in relation to the appended drawings, in which
- Figure 1 is a schematic view in longitudinal section of a transfer line section according to the invention; and
FIG. 2 is a view in longitudinal section, partial and enlarged, of the circled area of FIG. 1.
Sur la figure 1 on reconnaît les principaux éléments constitutifs d'une ligne de transfert de fluide cryogénique selon l'invention, par exemple pour le transfert d'azote liquide ou d'argon liquide, à savoir un tube de transfert 1 s'étendant coaxialement dans une enveloppe extérieure 2 en étant maintenu concentriquement dans cette dernière par des entretoises de centrage 3 et des chicanes d'extrémité 4 fermant de façon étanche le volume intérieur entre le tube 1 et l'enveloppe 2 qui est mis sous vide via un raccord hermétiquement obturable tel que 5. In Figure 1 we recognize the main components of a cryogenic fluid transfer line according to the invention, for example for the transfer of liquid nitrogen or liquid argon, namely a transfer tube 1 extending coaxially in an outer casing 2 while being held concentrically in the latter by centering spacers 3 and end baffles 4 sealingly closing the interior volume between the tube 1 and the casing 2 which is evacuated via a hermetically sealed connection closable as 5.
Selon un aspect de l'invention, le tube intérieur 1 est réalisé en alliage de fer et de nickel présentant un faible coefficient de dilatation thermique, typiquement un alliage 64 % Fe/36 % Ni connu sous l'appellation
Invar.According to one aspect of the invention, the inner tube 1 is made of an alloy of iron and nickel having a low coefficient of thermal expansion, typically an alloy 64% Fe / 36% Ni known under the name
Invar.
Selon un autre aspect de l'invention, comme on le voit mieux sur la figure 2, autour du tube 1 est bobinée une bande de tissu d'adsorbant, typiquement constituée majoritairement de fibres de charbon actif, tel que commercialisé sous l'appellation ACTITEX Q Ru1301 par la Société ACTITEX. According to another aspect of the invention, as can be seen more clearly in FIG. 2, around a tube 1 is wound a strip of adsorbent fabric, typically consisting mainly of activated carbon fibers, as marketed under the name ACTITEX Q Ru1301 by the company ACTITEX.
Autour des couches d'adsorbant 5 est disposé le calorifugeage 6, constitué de plusieurs couches, typiquement au moins dix, en pratique environ vingt, d'un super isolant tel que celui commercialisé sous l'appellation NHl2ST par la société CASCADEC, complété avantageusement par une fine couche intérieure d'aluminium 7, d'une épaisseur de l'ordre de 15 , interposée entre la surface extérieure du tube 1 et l'adsorbant 5. Around the adsorbent layers 5 is arranged the thermal insulation 6, consisting of several layers, typically at least ten, in practice about twenty, of a super insulator such as that sold under the name NHl2ST by the company CASCADEC, advantageously supplemented by a thin inner layer of aluminum 7, with a thickness of the order of 15, interposed between the outer surface of the tube 1 and the adsorbent 5.
Dans un exemple pratique, le tube interne a un diamètre de 22 mm et l'enveloppe extérieure a un diamètre inférieur à environ 75 mm, typiquement d'environ 60 mm, alors que, avec les techniques antérieures le diamètre de l'enveloppe extérieure ne pouvait être inférieur à 76,1 mm. In a practical example, the inner tube has a diameter of 22 mm and the outer casing has a diameter less than about 75 mm, typically about 60 mm, while, with prior techniques, the diameter of the outer casing does not could be less than 76.1 mm.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9611115A FR2753257B1 (en) | 1996-09-12 | 1996-09-12 | CRYOGENIC FLUID TRANSFER LINE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9611115A FR2753257B1 (en) | 1996-09-12 | 1996-09-12 | CRYOGENIC FLUID TRANSFER LINE |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2753257A1 true FR2753257A1 (en) | 1998-03-13 |
FR2753257B1 FR2753257B1 (en) | 1998-10-16 |
Family
ID=9495671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9611115A Expired - Fee Related FR2753257B1 (en) | 1996-09-12 | 1996-09-12 | CRYOGENIC FLUID TRANSFER LINE |
Country Status (1)
Country | Link |
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FR (1) | FR2753257B1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000031459A1 (en) * | 1998-11-20 | 2000-06-02 | Mi Developments Austria Ag & Co Kg | Tubular construction |
WO2008017865A1 (en) * | 2006-08-11 | 2008-02-14 | Bhp Billiton Petroleum Pty Ltd | Improvements relating to pipe |
GB2448916A (en) * | 2007-05-03 | 2008-11-05 | Verderg Engineering Ltd | Pipeline for low temperature fluids |
US8079619B2 (en) | 2003-03-05 | 2011-12-20 | Bhp Billiton Petroleum Pty Limited | Hose end fitting |
CN115435182A (en) * | 2022-10-24 | 2022-12-06 | 四川空分设备(集团)有限责任公司 | Vacuum pipeline and preparation process thereof |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100229991A1 (en) | 2006-05-08 | 2010-09-16 | Joel Aron Witz | Hose |
GB0609079D0 (en) | 2006-05-08 | 2006-06-21 | Bhp Billiton Petroleum Pty Ltd | Improvements relating to hose |
ES2640772T3 (en) | 2006-05-08 | 2017-11-06 | Bhp Billiton Innovation Pty Ltd | Improvements related to flexible pipes |
GB0612991D0 (en) | 2006-06-29 | 2006-08-09 | Bhp Billiton Petroleum Pty Ltd | Improvements relating to hose |
GB0616053D0 (en) | 2006-08-11 | 2006-09-20 | Bhp Billiton Petroleum Pty Ltd | Improvements relating to hose |
AU2008299662B2 (en) | 2007-09-14 | 2013-10-17 | Dunlop Oil and Marine Ltd. | Hose |
US9441766B2 (en) | 2009-06-02 | 2016-09-13 | Bhp Billiton Petroleum Pty Ltd. | Reinforced hose |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2198085A1 (en) * | 1972-08-30 | 1974-03-29 | Linde Ag | |
DE2917844A1 (en) * | 1979-05-03 | 1980-11-06 | Kabel Metallwerke Ghh | Tube system for carrying cold liquid or gas - has gas absorber in thermal insulation vacuum, esp. for superconducting cable in liq. gas line |
-
1996
- 1996-09-12 FR FR9611115A patent/FR2753257B1/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2198085A1 (en) * | 1972-08-30 | 1974-03-29 | Linde Ag | |
DE2917844A1 (en) * | 1979-05-03 | 1980-11-06 | Kabel Metallwerke Ghh | Tube system for carrying cold liquid or gas - has gas absorber in thermal insulation vacuum, esp. for superconducting cable in liq. gas line |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000031459A1 (en) * | 1998-11-20 | 2000-06-02 | Mi Developments Austria Ag & Co Kg | Tubular construction |
US8079619B2 (en) | 2003-03-05 | 2011-12-20 | Bhp Billiton Petroleum Pty Limited | Hose end fitting |
WO2008017865A1 (en) * | 2006-08-11 | 2008-02-14 | Bhp Billiton Petroleum Pty Ltd | Improvements relating to pipe |
JP2010500521A (en) * | 2006-08-11 | 2010-01-07 | ビーエイチピー ビルリトン ペトロレウム ピーティーワイ エルティーディー | Pipe improvements |
EA014600B1 (en) * | 2006-08-11 | 2010-12-30 | БиЭйчПи БИЛЛИТОН ПЕТРОЛЕУМ ПТИ ЛТД. | Improvements relating to pipe |
US8196611B2 (en) | 2006-08-11 | 2012-06-12 | Bhp Billiton Petroleum Pty Ltd. | Pipe |
AU2007283287B2 (en) * | 2006-08-11 | 2013-10-24 | Dunlop Oil and Marine Ltd. | Improvements relating to pipe |
NO338871B1 (en) * | 2006-08-11 | 2016-10-31 | Bhp Billiton Petroleum Pty Ltd | Hose, system for transporting fluids between offshore installations and method for transporting cryogenic fluid underwater |
GB2448916A (en) * | 2007-05-03 | 2008-11-05 | Verderg Engineering Ltd | Pipeline for low temperature fluids |
CN115435182A (en) * | 2022-10-24 | 2022-12-06 | 四川空分设备(集团)有限责任公司 | Vacuum pipeline and preparation process thereof |
CN115435182B (en) * | 2022-10-24 | 2023-01-06 | 四川空分设备(集团)有限责任公司 | Vacuum pipeline and preparation process thereof |
Also Published As
Publication number | Publication date |
---|---|
FR2753257B1 (en) | 1998-10-16 |
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