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DE1167630B - Filler for bending multi-wall insulating pipes - Google Patents

Filler for bending multi-wall insulating pipes

Info

Publication number
DE1167630B
DE1167630B DEE18952A DEE0018952A DE1167630B DE 1167630 B DE1167630 B DE 1167630B DE E18952 A DEE18952 A DE E18952A DE E0018952 A DEE0018952 A DE E0018952A DE 1167630 B DE1167630 B DE 1167630B
Authority
DE
Germany
Prior art keywords
filler
bending
wall
wall insulating
asbestos
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
DEE18952A
Other languages
German (de)
Inventor
Dipl-Ing Alfred Hettich
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.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
J Eberspaecher GmbH and Co KG
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 J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Priority to DEE18952A priority Critical patent/DE1167630B/en
Publication of DE1167630B publication Critical patent/DE1167630B/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D9/00Bending tubes using mandrels or the like
    • B21D9/01Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Insulation (AREA)

Description

Füllmittel für das Biegen von Mehrwandisolierrohren Die Erfindung bezieht sich auf ein Füllmittel für den Ringraum zwischen den Wänden von Mehrwandisolierrohr, insbesondere Doppelwandisolierrohr, zur Aufrechterhaltung eines gleichmäßigen Wandabstandes beim Biegen. Üblicherweise füllt man den Ringraum mit einem körnigen Gut, beispielsweise mit Sand, den man hineinpreßt und führt dann den Biegevorgang durch. Der Sand wird nach dem Biegen durch vorgesehene Bohrungen od. dgl. herausgenommen. Dann wird in den Ringraum der Isolierstoff, beispielsweise Asbest od. dgl., eingeführt.Filler for the bending of multi-wall insulating pipes The invention refers to a filler for the annulus between the walls of multi-wall insulating pipe, in particular double-walled insulating pipe, to maintain an even distance from the wall when bending. Usually you fill the annular space with a granular material, for example with sand, which is pressed into it and then carries out the bending process. The sand will after bending through holes provided or the like. Then in the annulus of the insulating material, for example asbestos or the like. Introduced.

Diese Arbeitsweise ist kostspielig, weil viele Arbeitsschritte durchgeführt werden müssen. Erfindungsgemäß wird als Füllmittel zur Aufrechterhaltung eines gleichmäßigen Wandabstandes beim Biegen Asbest verwendet. Mit anderen Worten, Asbest soll nicht nur als Isoliermaterial, sondern auch als Füllmittel für das Biegen verwendet werden. Hierdurch kann der vor dem Biegen als Füllmittel in den Ringraum zwischen den Wänden des Mehrwandrohres zur Aufrechterhaltung eines gleichmäßigen Wandabstandes beim Biegen eingebrachte Asbest nach dem Biegen darin als Isoliermaterial verbleiben. Die Arbeitsschritte des Füllens mit einem gesonderten körnigen Gut, das Entleeren und das recht schwierige Einführen des Isoliermaterials in den gekrümmten Hohlraum entfallen.This way of working is costly because many work steps are carried out Need to become. According to the invention is used as a filler to maintain a uniform Wall clearance used when bending asbestos. In other words, asbestos is not supposed to Can only be used as an insulating material but also as a filler for bending. This allows the before bending as a filler in the annular space between the walls of the multi-wall pipe to maintain an even distance from the wall Asbestos introduced into bending remains in it as an insulating material after bending. The working steps of filling with a separate granular material, the emptying and the rather difficult introduction of the insulating material into the curved cavity omitted.

Da das Einbringen des faserigen Asbests in den Ringraum des Rohres schwieriger ist als das Einfüllen von Sand, wird noch vorgeschlagen, daß bei dem Mehrwandisolierrohr in an sich bekannter Weise wenigstens eines der Rohre aus zwei miteinander verbundenen Preßhälften besteht.As the introduction of the fibrous asbestos into the annulus of the pipe is more difficult than pouring in sand, it is suggested that at that Multi-wall insulating tube in a manner known per se at least one of the two tubes interconnected press halves consists.

Die Erfindung wird an Hand der Zeichnung näher erläutert. Es zeigt in perspektivischer Darstellung F i g. 1 ein gerades Doppelwandrohr und F i g. 2 ein gebogenes Doppelwandrohr.The invention is explained in more detail with reference to the drawing. It shows in perspective illustration F i g. 1 a straight double-walled pipe and FIG. 2 a curved double wall pipe.

Beim Ausführungsbeispiel ist ein Innenrohr 1 mit einer Asbestschicht 2 umgeben, die durch gepreßte Halbschalen 3 umschlossen ist. Die Preßschalenhälften 3 sind an Stehborden 3 a durch Punktschweißen miteinander verbunden. Der Biegevorgang wird an dem in- dieser Weise vorbereiteten Rohrstück vollzogen. Dabei werden die beiderseitigen Trennfugen 5 und 6 in die bei dem Biegevorgang »neutrale« Zone gelegt. Bei Stehfalzen oder -borden stehen die Trennfugen dann nach der Biegung senkrecht zu der Biegungsebene des isolierten Rohrkrümmers. An der inneren Halbschale 3 bilden sich gegebenenfalls beim Biegevorgang Falten 4.In the exemplary embodiment, there is an inner tube 1 with an asbestos layer 2, which is enclosed by pressed half-shells 3. The press shell halves 3 are connected to each other at standing shelves 3 a by spot welding. The bending process is carried out on the pipe section prepared in this way. The Joints 5 and 6 on both sides are placed in the "neutral" zone during the bending process. In the case of standing seams or borders, the separating joints are then vertical after the bend to the bend plane of the insulated pipe elbow. Form 3 on the inner half-shell possibly folds during the bending process 4.

Claims (2)

Patentansprüche: 1. Die Verwendung von Asbest als Füllmittel (2) für den Ringraum zwischen den Wänden (1, 3) von Mehrwandisolierrohr, insbesondere Doppelwandisolierrohr, zur Aufrechterhaltung eines gleichmäßigen Wandabstandes beim Biegen. Claims: 1. The use of asbestos as a filler (2) for the annular space between the walls (1, 3) of multi-wall insulating pipe, in particular double-walled insulating pipe, to maintain an even distance from the wall when bending. 2. Mehrwandisolierrohr für die Verwendung von Asbest als Füllmittel nach Anspruch 1, dadurch gekennzeichnet, daß in an sich bekannter Weise wenigstens eines der Rohre aus zwei miteinander verbundenen Preßhälften (3) besteht. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 522 443, 617 014, 698 949, 972 793; britische Patentschrift Nr. 495 302.2. Multi-wall insulating tube for the use of asbestos as a filler according to claim 1, characterized in that at least one of the tubes consists of two interconnected press halves (3) in a manner known per se. Considered publications: German Patent Nos. 522 443, 617 014, 698 949, 972 793; British Patent No. 495 302.
DEE18952A 1960-02-26 1960-02-26 Filler for bending multi-wall insulating pipes Pending DE1167630B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEE18952A DE1167630B (en) 1960-02-26 1960-02-26 Filler for bending multi-wall insulating pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE18952A DE1167630B (en) 1960-02-26 1960-02-26 Filler for bending multi-wall insulating pipes

Publications (1)

Publication Number Publication Date
DE1167630B true DE1167630B (en) 1964-04-09

Family

ID=7069889

Family Applications (1)

Application Number Title Priority Date Filing Date
DEE18952A Pending DE1167630B (en) 1960-02-26 1960-02-26 Filler for bending multi-wall insulating pipes

Country Status (1)

Country Link
DE (1) DE1167630B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3472056A (en) * 1966-11-25 1969-10-14 Walker Mfg Co Pipe bending apparatus and method of bending
US3630325A (en) * 1969-12-16 1971-12-28 Insul 8 Corp Support system for movable conductors
DE3937803A1 (en) * 1988-11-15 1990-05-23 Usui Kokusai Sangyo Kk METHOD FOR PRODUCING A DOUBLE TUBE
DE19745315A1 (en) * 1997-10-14 1999-04-15 Bischoff Erhardt Gmbh Co Kg Method for bending duo-pipe for conducting exhaust gas in automotive internal combustion engines
US5916319A (en) * 1995-11-24 1999-06-29 Yazaki Industrial Chemical Co., Ltd. Method to cold-bend resin-coated ribbed steel pipes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE522443C (en) * 1931-04-08 Mitteldeutsche Stahlwerke Akt Device for calibrating pipe bends
DE617014C (en) * 1932-08-03 1935-08-10 Ernst Broschat Process for the formation of transverse folds in the wall of a metal pipe
GB495302A (en) * 1937-05-31 1938-11-10 Messerschmitt Boelkow Blohm Improvements in and relating to apparatus for the production of curved, elongated profiled sheet-metal members of channel cross section
DE698949C (en) * 1938-02-22 1940-11-20 Mannesmann Ag Method of bending double-jacket pipes
DE972793C (en) * 1948-12-01 1959-09-24 Andre Huet Method for producing a non-corrugated curvature on straight pipes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE522443C (en) * 1931-04-08 Mitteldeutsche Stahlwerke Akt Device for calibrating pipe bends
DE617014C (en) * 1932-08-03 1935-08-10 Ernst Broschat Process for the formation of transverse folds in the wall of a metal pipe
GB495302A (en) * 1937-05-31 1938-11-10 Messerschmitt Boelkow Blohm Improvements in and relating to apparatus for the production of curved, elongated profiled sheet-metal members of channel cross section
DE698949C (en) * 1938-02-22 1940-11-20 Mannesmann Ag Method of bending double-jacket pipes
DE972793C (en) * 1948-12-01 1959-09-24 Andre Huet Method for producing a non-corrugated curvature on straight pipes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3472056A (en) * 1966-11-25 1969-10-14 Walker Mfg Co Pipe bending apparatus and method of bending
US3630325A (en) * 1969-12-16 1971-12-28 Insul 8 Corp Support system for movable conductors
DE3937803A1 (en) * 1988-11-15 1990-05-23 Usui Kokusai Sangyo Kk METHOD FOR PRODUCING A DOUBLE TUBE
US5916319A (en) * 1995-11-24 1999-06-29 Yazaki Industrial Chemical Co., Ltd. Method to cold-bend resin-coated ribbed steel pipes
DE19745315A1 (en) * 1997-10-14 1999-04-15 Bischoff Erhardt Gmbh Co Kg Method for bending duo-pipe for conducting exhaust gas in automotive internal combustion engines

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