FR2721373A1 - Double=walled tubing made from folded sheet metal - Google Patents

Double=walled tubing made from folded sheet metal Download PDF

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Publication number
FR2721373A1
FR2721373A1 FR9407424A FR9407424A FR2721373A1 FR 2721373 A1 FR2721373 A1 FR 2721373A1 FR 9407424 A FR9407424 A FR 9407424A FR 9407424 A FR9407424 A FR 9407424A FR 2721373 A1 FR2721373 A1 FR 2721373A1
Authority
FR
France
Prior art keywords
double
sheet metal
folded sheet
tubing made
walled tubing
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
Application number
FR9407424A
Other languages
French (fr)
Other versions
FR2721373B1 (en
Inventor
Pierre Georges Nachbaur
Jean Fernand Cartier
Francois Denis Taveau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom Power Heat Exchange SA
Original Assignee
Alstom Power Heat Exchange SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alstom Power Heat Exchange SA filed Critical Alstom Power Heat Exchange SA
Priority to FR9407424A priority Critical patent/FR2721373A1/en
Priority to FR9409234A priority patent/FR2721374A1/en
Publication of FR2721373A1 publication Critical patent/FR2721373A1/en
Application granted granted Critical
Publication of FR2721373B1 publication Critical patent/FR2721373B1/fr
Granted legal-status Critical Current

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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
    • F16L9/00—Rigid pipes
    • F16L9/17—Rigid pipes obtained by bending a sheet longitudinally and connecting the edges

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The double-walled tube (5) is made from two sheets of metal (1,2) rolled into a circle, one inside of the other. The longitudinal butting edges (3,4) of the two sheets are then welded in a single common operation so that the weld (6) is common to the thicknesses of the two butting sheets.

Description

On connait des tubes à double paroi obtenus à partir de deux tubes ébauchés séparément puis manchonnés l'un dans l'autre, ce qui nécessite donc une opération de manchonnage et limite la longueur du double tube ainsi obtenu. Double-walled tubes are known which are obtained from two tubes roughly separated and then sleeved one inside the other, which therefore requires a sleeving operation and limits the length of the double tube thus obtained.

Le tube à double paroi objet de la présente invention permet d'éviter
Ces inconvénients. En effet, ce tube est caractérisé en ce qu'il est obtenu à partir d'une superposition de deux bandes de feuillard qui sont envirolées (roulées) toutes les deux ensemble et dont les bords longitudinaux sont soudés entre eux en une seule passe commune aux deux épaisseurs, ce qui permet de former le double tube en continu depuis le stade initial de sa fabrication (superposition des deux bandes de feuillard) jusqu'à son étirage final, et cela sans limitation de la longeur du double tube ainsi obtenu.The double-walled tube object of the present invention makes it possible to avoid
These disadvantages. Indeed, this tube is characterized in that it is obtained from a superposition of two strips of strip which are surrounded (rolled) both together and whose longitudinal edges are welded together in a single pass common to two thicknesses, which makes it possible to form the double tube continuously from the initial stage of its manufacture (superposition of the two strips of strip) until its final stretching, and this without limiting the length of the double tube thus obtained.

Selon une réalisation de l'invention, les deux bandes de feuillard sont positionnées à plat l'une sur l'autre à partir de deux dévidoirs, ouis elles sont envirolées (roulées) ensemble par passage dans des cages de filières profilées de façon à obtenir un double tube, ouvert, dont les deux bords longitudinaux sont ensuite soudés entre eux par un procédé automatique. According to one embodiment of the invention, the two strips of strip are positioned flat one on the other from two reels, or they are surrounded (rolled) together by passing through profiled die cages so as to obtain a double open tube, the two longitudinal edges of which are then welded together by an automatic process.

Les dessins joints illustrent le mode de réalisation défini ci-dessus. The accompanying drawings illustrate the embodiment defined above.

La figure 1 représente, en coupe transversale, les deux bandes de feuillard (I) (2) superposées avant leur envirolage; la figure 2 montre le profil obtenu après envirolage commun que l'on peut aussi appeler co-envirolage des deux bandes de feuillard (l) (2), c'est à dire un double tube ouvert; la figure 3 montre la coupe du double tube fini (5), après soudage des deux bords longitudinaux (3) (4) du double tube ouvert, par fusion avec métal d'apport (6). Figure 1 shows, in cross section, the two strips of strip (I) (2) superimposed before their surrounding; FIG. 2 shows the profile obtained after common wrapping which can also be called co-wrapping of the two strips of strip (l) (2), that is to say a double open tube; Figure 3 shows the section of the finished double tube (5), after welding of the two longitudinal edges (3) (4) of the open double tube, by fusion with filler metal (6).

Des variantes concernant notamment le soudage peuvent être apportées à ce mode de réalisation sans sortir du cadre de l'invention. Variants relating in particular to welding can be made to this embodiment without departing from the scope of the invention.

Le tube à double paroi objet de la présente invention est destiné surtout à des échangeurs thermiques qui nécessitent à la fois une grande sécurité dans l'isolement des fluides véhiculés et un faisceau tubulaire de grande longueur, notamment à des échangeurs thermiques pour centrales nucléaires.  The double-walled tube which is the subject of the present invention is intended above all for heat exchangers which require both great security in the isolation of the fluids conveyed and a tubular bundle of great length, in particular for heat exchangers for nuclear power plants.

Claims (1)

REVENDICATION CLAIM Tube à double paroi (5) caractérisé en ce qu'il est constitué de deux bandes de feuillard (1) (2) envirolées (roules) toutes les deux ensemble, c'est à dire co-envirolées, et dont les bords longitudinaux (3) (4) sont soudés entre eux par une soudure (6) commune aux deux épaisseurs de ces bandes.  Double-walled tube (5) characterized in that it consists of two strips of strip (1) (2) surrounded (rolls) both together, that is to say co-surrounded, and whose longitudinal edges ( 3) (4) are welded together by a weld (6) common to the two thicknesses of these strips.
FR9407424A 1994-06-17 1994-06-17 Double=walled tubing made from folded sheet metal Granted FR2721373A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR9407424A FR2721373A1 (en) 1994-06-17 1994-06-17 Double=walled tubing made from folded sheet metal
FR9409234A FR2721374A1 (en) 1994-06-17 1994-07-26 Double=walled tubing made from folded sheet metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9407424A FR2721373A1 (en) 1994-06-17 1994-06-17 Double=walled tubing made from folded sheet metal

Publications (2)

Publication Number Publication Date
FR2721373A1 true FR2721373A1 (en) 1995-12-22
FR2721373B1 FR2721373B1 (en) 1997-02-21

Family

ID=9464325

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9407424A Granted FR2721373A1 (en) 1994-06-17 1994-06-17 Double=walled tubing made from folded sheet metal

Country Status (1)

Country Link
FR (1) FR2721373A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000016023A1 (en) * 1998-09-14 2000-03-23 Arise Technologies Corporation Freeze protection apparatus for fluid transport passages
WO2022125001A1 (en) * 2020-09-14 2022-06-16 Net Boru Sanayi Ve Dis Ticaret Kollektif Sirketi Bora Saman Ve Ortagi Copper coated multi-layered pipe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1082181A (en) * 1953-08-06 1954-12-27 Metal parts stamped or shaped to two or more thicknesses, in particular bodywork parts and pipes
FR1446464A (en) * 1965-06-10 1966-07-22 Duct such as pipe for conditioning, ventilation or smoke evacuation
EP0255465A2 (en) * 1986-07-31 1988-02-03 BUNDY GmbH Small caliber multi-layered metal pipe
WO1988008620A1 (en) * 1987-04-30 1988-11-03 Flexible Band Applications Limited An elongate hollow element

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1082181A (en) * 1953-08-06 1954-12-27 Metal parts stamped or shaped to two or more thicknesses, in particular bodywork parts and pipes
FR1446464A (en) * 1965-06-10 1966-07-22 Duct such as pipe for conditioning, ventilation or smoke evacuation
EP0255465A2 (en) * 1986-07-31 1988-02-03 BUNDY GmbH Small caliber multi-layered metal pipe
WO1988008620A1 (en) * 1987-04-30 1988-11-03 Flexible Band Applications Limited An elongate hollow element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000016023A1 (en) * 1998-09-14 2000-03-23 Arise Technologies Corporation Freeze protection apparatus for fluid transport passages
WO2022125001A1 (en) * 2020-09-14 2022-06-16 Net Boru Sanayi Ve Dis Ticaret Kollektif Sirketi Bora Saman Ve Ortagi Copper coated multi-layered pipe

Also Published As

Publication number Publication date
FR2721373B1 (en) 1997-02-21

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