EP1647340B1 - Verfahren zum Herstellen eines flexiblen, im Inneren glatten Wellrohres, sowie ein nach dem Verfahren hergestelltes Wellrohr - Google Patents

Verfahren zum Herstellen eines flexiblen, im Inneren glatten Wellrohres, sowie ein nach dem Verfahren hergestelltes Wellrohr Download PDF

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Publication number
EP1647340B1
EP1647340B1 EP05021761A EP05021761A EP1647340B1 EP 1647340 B1 EP1647340 B1 EP 1647340B1 EP 05021761 A EP05021761 A EP 05021761A EP 05021761 A EP05021761 A EP 05021761A EP 1647340 B1 EP1647340 B1 EP 1647340B1
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EP
European Patent Office
Prior art keywords
strip
corrugated
deformed
corrugations
corrugated pipe
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.)
Active
Application number
EP05021761A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1647340A1 (de
Inventor
Horst Hahn
Hans-Georg Anton
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.)
Fritz Hahn & Co KG GmbH
Original Assignee
Fritz Hahn & Co KG GmbH
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Filing date
Publication date
Application filed by Fritz Hahn & Co KG GmbH filed Critical Fritz Hahn & Co KG GmbH
Publication of EP1647340A1 publication Critical patent/EP1647340A1/de
Application granted granted Critical
Publication of EP1647340B1 publication Critical patent/EP1647340B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/121—Making tubes or metal hoses with helically arranged seams with non-welded and non-soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/123—Making tubes or metal hoses with helically arranged seams of coated strip material; Making multi-wall tubes

Definitions

  • the invention relates to a method for producing a flexible, smooth inside corrugated tube, and a corrugated tube produced by the method, by simultaneously helically winding a thin outer corrugated strip, preferably a metal strip, and a thin inner smooth strip, preferably a metal strip, in which At least one shaft of the tensioned under outer wavy band inserted with the interposition of the one edge of the tensioned inside smooth strip in at least one shaft of the previously generated tube winding and at least one of the nested waves is deformed by compression, wherein the inner smooth band about the has the same width as the outer corrugated tape and the inner smooth belt is inserted with its other edge in the following by compressing to be deformed shaft of the tube winding.
  • Such a method is from the German Patent DE 42 01 859 C2 the applicant known.
  • the inner smooth belt ends before the next shaft to be deformed. If this corrugated tube produced in this way is bent, the undeformed edge of the inner smooth strip bends away from the inside of the tube and often returns when the tube is bent back Corrugated pipe no longer back to its original position. Furthermore, condensate can get behind the inner smooth band, thus in the cavity between the inner smooth and outer corrugated band, and there over time to concentrate, so it can come in some cases to corrosion. In addition, this corrugated pipe can not be cleaned.
  • a corrugated tube is known from a helically wound outer corrugated ribbon and an inner smooth ribbon in which the waves intermeshed at the edges of the ribbons are deformed by compression.
  • the object of the invention is to provide a method for producing a flexible corrugated tube of the type mentioned in such a way that in a simple and cost-effective manner, the production of a flexible, smooth inner corrugated pipe is possible.
  • the inner smooth band has at least one running in the tape longitudinal direction predetermined bending groove, which runs in the tube winding in the middle between two wave crests of the corrugated tape.
  • edges of the inner smooth band have preformed waves in the area of the shafts to be deformed by compression.
  • the wave flanks of the omega-shaped waves of the corrugated strip are alternately compressed at intervals with the wave crests of the deformed waves in a punctiform manner.
  • the apex of the deformed waves lies flat on the inside of the corrugated pipe.
  • a manufactured according to the method of flexible corrugated pipe of a helically wound outer corrugated tape and an inner smooth tape in which the nested at the edges of the bands waves are deformed by compression, has a running in the tape longitudinal direction of the inner smooth belt predetermined bending groove in the tube winding runs in the middle between two wave crests of the outer corrugated band.
  • the wave flanks of the omega-shaped waves are alternately compressed in a point-like manner with the wave crests of the deformed waves.
  • the crest of the omega-shaped waves is flush with the inside of the corrugated tube.
  • the depth of the predetermined bending groove of the inner smooth belt is at most one third of the amplitude of the waves of the outer corrugated belt.
  • the materials and / or the thickness of the inner and outer bands are different.
  • the inner band is made of stainless steel.
  • a device 1 for producing a flexible corrugated pipe an outer corrugated tape 2 is fed, which is withdrawn from a supply roll 3. Above the corrugated strip 2, the device 1 is fed with an inner smooth strip 4, which is drawn off from a supply roll 5.
  • the device 1 has a winding device 6 of circularly arranged on the outer circumference of the corrugated tube 7 to be wound freely rotatable support rollers 8, two arranged at the inlet point of the bands 2 and 4 in the winding device, acting on the two broad sides of the bands, the mutual connection of adjacent in the pipe Pipe winding causing, drivable connecting rollers 9 and 10 and arranged in front of the connecting rollers 9 and 10 bending roller 14th
  • the device 1 has a drive roller pair 11 for that inner smooth belt and a drive roller pair 12 for the outer corrugated belt 2.
  • a drive roller pair 11 for that inner smooth belt and a drive roller pair 12 for the outer corrugated belt 2.
  • roller belt guides 13 for the outer corrugated belt 2 and the inner corrugated belt 4th intended are respectively roller belt guides 22 for the outer corrugated belt 2 and the inner corrugated belt 4th intended.
  • roller belt guides 22 are arranged in the direction of the belts 2, 4 in front of the drive roller pairs 11 and 12.
  • the drive roller pairs 11 and 12 which pull the bands 2, 4 from the supply rollers 3 and 5, have a smaller circumferential speed than the connecting rollers 9 and 10, so that the bands 2 and 4 are supplied under tension.
  • the distance of the individual rollers of the drive roller pairs 11 and 12 can be changed so that in a simple manner, the supply voltage is adjustable.
  • the Fig. 2 shows the outer corrugated band 2 in cross section
  • the FIGS. 3 to 5 the inner smooth band 4 in different embodiments in cross section.
  • the inner smooth belt 4 already has pre-formed shafts 15 at its edges which correspond to the waves of the outer corrugated belt 2. Characterized the insertion of the edges of the inner smooth belt 4 is facilitated in the waves of the outer corrugated belt 2.
  • the inner smooth belt 4 is exactly guided in the roller belt guides 13 and 22 so.
  • the inner smooth belt 4 in the belt longitudinal direction running predetermined bending grooves 16 in the wound tube lie in the middle between two vertices of the outer corrugated tape 2.
  • Fig. 5 and after Fig. 8 has the inner smooth belt 4 three predetermined bending grooves 16, after Fig. 4 five predetermined bending grooves 16 and after Fig. 3 one of the number of waves of the outer wavy band 2 corresponding number of predetermined bending grooves 16th
  • the depth of the predetermined bending grooves 16 is at most one third of the wave amplitude of the corrugated strip. 2
  • These predetermined bending grooves 16 ensure that the shaft tube 7, which is wound from the strip 4, which is approximately smooth inside and the outer corrugated strip 2, is flexible.
  • Fig. 6 shows the in the region of the waves to be deformed of the tape roll inrapitzden bands 2, 4 in an exploded view.
  • the designated 17 arrow points to the previously deformed shaft of the tube coil, the arrow designated 18 shows the shaft to be deformed of the tube coil and the arrow designated 19 shows the shaft to be deformed below.
  • the wave flanks 20 are compressed omega-shaped on the crest 21, wherein the crest 21 is flush with the inside of the corrugated tube. This prevents the penetration of condensate into the omega-shaped connection. Due to the alternating punctiform compression of the wave flanks 20 with the vertices 21, the omega-shaped connection is additionally secured.
  • the inner smooth belt 4 may advantageously consist of a very thin corrosion-resistant material, while the outer corrugated belt 2 consists of a less corrosion-resistant thicker material, so that the outer corrugated belt 2 stabilizes the corrugated tube 7. In this way, the material costs can be reduced.
  • the corrugated pipe Due to the inner smooth belt 4, the corrugated pipe has a much lower flow resistance than a conventional corrugated pipe. In addition, the corrugated pipe according to the invention is very easy to clean.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
EP05021761A 2004-10-12 2005-10-06 Verfahren zum Herstellen eines flexiblen, im Inneren glatten Wellrohres, sowie ein nach dem Verfahren hergestelltes Wellrohr Active EP1647340B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004049766A DE102004049766B3 (de) 2004-10-12 2004-10-12 Verfahren und Vorrichtung zum Herstellen eines flexiblen, im Inneren glatten Wellrohres, sowie ein nach dem Verfahren hergestelltes Wellrohr

Publications (2)

Publication Number Publication Date
EP1647340A1 EP1647340A1 (de) 2006-04-19
EP1647340B1 true EP1647340B1 (de) 2008-02-20

Family

ID=35445829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05021761A Active EP1647340B1 (de) 2004-10-12 2005-10-06 Verfahren zum Herstellen eines flexiblen, im Inneren glatten Wellrohres, sowie ein nach dem Verfahren hergestelltes Wellrohr

Country Status (5)

Country Link
EP (1) EP1647340B1 (es)
AT (1) ATE386597T1 (es)
DE (2) DE102004049766B3 (es)
ES (1) ES2298903T3 (es)
PT (1) PT1647340E (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009034628A1 (de) 2009-07-24 2011-02-03 Fritz Hahn Gmbh & Co Kg Verfahren zum Aufbringen einer Isolierung auf ein Rohr und nach dem Verfahren hergestelltes Rohr
DE202011104565U1 (de) * 2011-08-18 2012-11-19 Witzenmann Gmbh Wickelschlauch mit torsionaler Fixierung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487537A (en) * 1965-04-06 1970-01-06 Jack P Lombardi Method for making a spiral seamed corrugated laminated pipe with uncorrugated interior
US3661314A (en) * 1969-12-18 1972-05-09 Alexandr Ivanovich Tselikov Mill to produce spiral-welded double layer pipes
US3857159A (en) * 1973-09-27 1974-12-31 Pacific Roller Die Co Inc Pipe forming method
US4160312A (en) * 1978-01-05 1979-07-10 James Nyssen Method and apparatus for making multi-layer spiral pipe
EP0109413B1 (en) * 1982-05-27 1988-11-09 Rib Loc International Limited Helically-formed pipe winding machine
DE4201859C2 (de) * 1992-01-24 1997-03-06 Hahn Fritz Gmbh Co Kg Verfahren und Vorrichtung zum Herstellen eines flexiblen, im Inneren glatten Wellrohres

Also Published As

Publication number Publication date
PT1647340E (pt) 2008-06-02
ATE386597T1 (de) 2008-03-15
DE102004049766B3 (de) 2006-06-08
EP1647340A1 (de) 2006-04-19
DE502005002895D1 (de) 2008-04-03
ES2298903T3 (es) 2008-05-16

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