EP1647340A1 - Method and device for manufacturing a flexible, on the inside smooth, corrugated pipe, and a corrugated pipe manufactured thereby - Google Patents

Method and device for manufacturing a flexible, on the inside smooth, corrugated pipe, and a corrugated pipe manufactured thereby Download PDF

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Publication number
EP1647340A1
EP1647340A1 EP05021761A EP05021761A EP1647340A1 EP 1647340 A1 EP1647340 A1 EP 1647340A1 EP 05021761 A EP05021761 A EP 05021761A EP 05021761 A EP05021761 A EP 05021761A EP 1647340 A1 EP1647340 A1 EP 1647340A1
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EP
European Patent Office
Prior art keywords
corrugated
band
belt
deformed
strip
Prior art date
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Granted
Application number
EP05021761A
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German (de)
French (fr)
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EP1647340B1 (en
Inventor
Horst Hahn
Hans-Georg Anton
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Fritz Hahn & Co KG GmbH
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Fritz Hahn & Co KG GmbH
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Publication of EP1647340A1 publication Critical patent/EP1647340A1/en
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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 and an apparatus for producing a flexible, smooth inside corrugated tube, as well as 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 outer corrugated strip is inserted with the interposition of 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.
  • a thin outer corrugated strip preferably a metal strip
  • a thin inner smooth strip preferably a metal strip in which at least one shaft of the tensioned outer corrugated strip is inserted with the interposition of 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.
  • the object of the invention is to provide a method and apparatus for producing a flexible corrugated pipe 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 approximately the same width as the outer corrugated tape, that the inner smooth band is inserted with its other edge in the subsequent by compressing to be deformed shaft of the tube winding and that the inner smooth band at least a 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 strip.
  • 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 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.
  • An advantageous apparatus for carrying out the method has an acting on the broad sides of the outer corrugated tape drive roller pair for supplying the corrugated tape under tension, a drive roller pair of the outer corrugated tape subsequent roller belt guide, acting on the broad sides of the inner smooth belt drive roller pair for supplying the inner smooth belt under tension, the drive roller pair of the inner smooth belt subsequent roller belt guide, and a winding device arranged with circular on the outer circumference of a tube winding of the tube to be wound, freely rotatable support rollers, two arranged at the inlet point of the bands in the winding device, respectively on the broad sides of the bands attacking, the mutual connection of the pipe in the adjacent tube winding causing drivable connecting rollers and arranged between the tape guides and the connecting rollers bending roller.
  • the supply voltage of the bands is adjustable by the drive roller pairs.
  • the drive roller pairs have a slightly lower peripheral speed than the connecting rollers.
  • the distance of the two rollers of each drive roller pair via an eccentric adjustable.
  • roller belt guides are arranged upstream of the drive roller pairs.
  • 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.
  • an apparatus 1 for producing a flexible corrugated tube an outer corrugated tape 2 is fed, which is withdrawn from a supply roll 3.
  • the device 1 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 rotating 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 4 are provided.
  • 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.
  • FIG. 2 shows the outer corrugated strip 2 in cross section, Figures 3 to 5, the inner smooth band 4 in different embodiments in cross section.
  • the inner smooth band 4 at its edges already pre-formed shafts 15 which correspond to the waves of the outer corrugated strip 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 has predetermined bending grooves 16 running in the longitudinal direction of the belt, which lie in the wound tube (FIGS. 8 and 9) in the middle between two crests of the outer corrugated belt 2.
  • the inner smooth belt 4 has three predetermined bending grooves 16, according to FIG. 4 five predetermined bending grooves 16 and according to FIG. 3, a number of predetermined bending grooves 16 corresponding to the number of waves of the outer corrugated belt 2.
  • 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 bands 2, 4 to be overlapped in the region of the waves of the band wound to be deformed, 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 in an omega-shaped manner onto the wave peak 21, the wave peak 21 being 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 band 4 can advantageously consist of a very thin corrosion-resistant material, while the outer corrugated band 2 consists of a less corrosion-resistant thicker material, so that the outer corrugated band 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)

Abstract

Production of flexible internally smooth corrugated tube with an inner smooth metal band (4) of the same width as the outer bent metal band (2). The corrugated tube has a bent groove (16) passing along the center. Independent claims are included for: (1) a device for carrying out the process; (2) a corrugated tube with an inner band in stainless steel.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Herstellen eines flexiblen, im Inneren glatten Wellrohres, sowie eines nach dem Verfahren hergestellten Wellrohres, durch gleichzeitiges schraubenlinienförmiges Wickeln eines dünnen äußeren gewellten Bandes, vorzugsweise eines Metallbandes, und eines dünnen inneren glatten Bandes, vorzugsweise eines Metallbandes, bei dem mindestens eine Welle des unter Spannung zulaufenden äußeren gewellten Bandes unter Zwischenlage des einen Randes des unter Spannung zulaufenden inneren glatten Bandes in mindestens eine Welle des vorausgehend erzeugten Rohrwickels eingelegt und mindestens eine der ineinander gelegten Wellen durch Zusammenpressen verformt wird.The invention relates to a method and an apparatus for producing a flexible, smooth inside corrugated tube, as well as 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 outer corrugated strip is inserted with the interposition of 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.

Ein derartiges Verfahren ist aus dem Deutschen Patent DE 42 01 859 C2 der Anmelderin bekannt. Bei diesem Verfahren endet das innere glatte Band vor der nächsten zu verformenden Welle. Wird dieses so hergestellte Wellrohr gebogen, so biegt sich der nicht verformte Rand des inneren glatten Bandes vom Rohrinneren ab und kehrt oftmals beim Zurückbiegen des Wellrohres nicht mehr in seine ursprüngliche Stellung zurück. Weiterhin kann Kondensat hinter das innere glatte Band gelangen, somit in den Hohlraum zwischen innerem glatten und äußerem gewellten Band, und sich dort im Lauf der Zeit aufkonzentrieren, sodass es in Einzelfällen zur Korrosion kommen kann. Außerdem kann dieses Wellrohr nicht gereinigt werden.Such a method is known from German Patent DE 42 01 859 C2 of the Applicant. In this method, 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 pass behind the inner smooth belt, thus in the cavity between inner smooth and outer corrugated tape, and there over time to concentrate, so that it can come in individual cases to corrosion. In addition, this corrugated pipe can not be cleaned.

Aus der US-Patentschrift 34 87 537 ist ein Verfahren und eine Vorrichtung zur Herstellung eines innen glatten, außen gewellten starren festen Rohres bekannt, das vorwiegend zur Verwendung als Abwasserkanalrohr bestimmt ist. Dazu werden gleichzeitig ein gewelltes und ein glattes Band schraubenlinienförmig über einen Dorn gewickelt, wobei das glatte und das gewellte Band aufeinanderliegen und an ihren beiden Rändern jeweils mit der nachfolgenden Windung fest verfalzt werden.From US-PS 34 87 537 a method and an apparatus for producing an internally smooth, externally corrugated rigid rigid tube is known, which is intended primarily for use as a sewer pipe. For this purpose, a corrugated and a smooth band are simultaneously wound helically over a mandrel, wherein the smooth and the wavy band lie on each other and are firmly crimped at its two edges in each case with the subsequent turn.

Ausgehend von diesem bekannten Stand der Technik besteht die Aufgabe der Erfindung darin, ein Verfahren und eine Vorrichtung zur Herstellung eines flexiblen Wellrohres der eingangs genannten Art derart weiterzubilden, dass auf einfache und kostengünstige Weise die Herstellung eines flexiblen, innen glatten Wellrohres möglich ist.Based on this known prior art, the object of the invention is to provide a method and apparatus for producing a flexible corrugated pipe 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.

Diese Aufgabe wird dadurch gelöst, dass das innere glatte Band etwa die gleiche Breite wie das äußere gewellte Band hat, dass das innere glatte Band mit seinem anderen Rand in die nachfolgend durch Zusammenpressen zu verformende Welle des Rohrwickels eingelegt wird und dass das innere glatte Band mindestens eine in Bandlängsrichtung verlaufende Sollknickrille hat, die im Rohrwickel in der Mitte zwischen zwei Wellenscheiteln des gewellten Bandes verläuft.This object is achieved in that the inner smooth band has approximately the same width as the outer corrugated tape, that the inner smooth band is inserted with its other edge in the subsequent by compressing to be deformed shaft of the tube winding and that the inner smooth band at least a 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 strip.

Vorteilhaft haben die Ränder des inneren glatten Bandes im Bereich der durch Zusammenpressen zu verformenden Wellen vorgeformte Wellen.Advantageously, the edges of the inner smooth band have preformed waves in the area of the shafts to be deformed by compression.

Vorzugsweise werden die Wellenflanken der omega-förmig verformten Wellen abwechselnd im Abstand punktförmig mit den Wellenscheiteln der verformten Wellen zusammengepresst.Preferably, the wave flanks of the omega-shaped waves are alternately compressed at intervals with the wave crests of the deformed waves in a punctiform manner.

Vorzugsweise liegt der Scheitel der verformten Wellen flächig an der Innenseite des Wellrohres.Preferably, the apex of the deformed waves lies flat on the inside of the corrugated pipe.

Eine vorteilhafte Vorrichtung zur Durchführung des Verfahrens hat ein an den Breitseiten des äußeren gewellten Bandes angreifendes Antriebsrollenpaar zur Zufuhr des gewellten Bandes unter Spannung, eine dem Antriebsrollenpaar des äußeren gewellten Bandes nachfolgende Rollenbandführung, ein an den Breitseiten des inneren glatten Bandes angreifendes Antriebsrollenpaar zur Zufuhr des inneren glatten Bandes unter Spannung, eine dem Antriebsrollenpaar des inneren glatten Bandes nachfolgende Rollenbandführung, sowie eine Wickeleinrichtung mit kreisförmig am Außenumfang eines Rohrwickels des zu wickelnden Rohres angeordneten, freidrehbaren Stützrollen, zwei an der Einlaufstelle der Bänder in die Wickeleinrichtung angeordnete, jeweils an den Breitseiten der Bänder angreifende, die gegenseitige Verbindung der im Rohr benachbarten Rohrwickel bewirkende antreibbare Verbindungsrollen und eine zwischen den Bandführungen und den Verbindungsrollen angeordnete Biegerolle.An advantageous apparatus for carrying out the method has an acting on the broad sides of the outer corrugated tape drive roller pair for supplying the corrugated tape under tension, a drive roller pair of the outer corrugated tape subsequent roller belt guide, acting on the broad sides of the inner smooth belt drive roller pair for supplying the inner smooth belt under tension, the drive roller pair of the inner smooth belt subsequent roller belt guide, and a winding device arranged with circular on the outer circumference of a tube winding of the tube to be wound, freely rotatable support rollers, two arranged at the inlet point of the bands in the winding device, respectively on the broad sides of the bands attacking, the mutual connection of the pipe in the adjacent tube winding causing drivable connecting rollers and arranged between the tape guides and the connecting rollers bending roller.

Vorteilhaft ist die Zufuhrspannung der Bänder durch die Antriebsrollenpaare einstellbar. Vorzugsweise haben die Antriebsrollenpaare eine etwas kleinere Umfangsgeschwindigkeit als die Verbindungsrollen. Vorzugsweise ist zur Regelung der Zufuhrspannung der Bänder der Abstand der beiden Rollen jedes Antriebsrollenpaares über einen Exzenter einstellbar.Advantageously, the supply voltage of the bands is adjustable by the drive roller pairs. Preferably, the drive roller pairs have a slightly lower peripheral speed than the connecting rollers. Preferably, to regulate the supply voltage of the bands, the distance of the two rollers of each drive roller pair via an eccentric adjustable.

Bei einer vorteilhaften Ausführungsform der Vorrichtung sind den Antriebsrollenpaaren Rollenbandführungen vorgeordnet.In an advantageous embodiment of the device, roller belt guides are arranged upstream of the drive roller pairs.

Ein nach dem Verfahren hergestelltes flexibles Wellrohr aus einem schraubenlinienförmig gewickelten äußeren gewellten Band und einem inneren glatten Band, bei dem die an den Rändern der Bänder ineinander liegenden Wellen durch Zusammenpressen verformt sind, hat eine in Bandlängsrichtung des inneren glatten Bandes verlaufende Sollknickrille, die im Rohrwickel in der Mitte zwischen zwei Wellenscheiteln des äußeren gewellten Bandes verläuft.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.

Vorteilhaft sind die Wellenflanken der omega-förmig verformten Wellen abwechselnd im Abstand punktförmig mit den Wellenscheiteln der verformten Wellen zusammengepresst.Advantageously, the wave flanks of the omega-shaped waves are alternately compressed in a point-like manner with the wave crests of the deformed waves.

Vorzugsweise liegt der Wellenscheitel der omega-förmig verformten Wellen flächenbündig an der Innenseite des Wellrohres an.Preferably, the crest of the omega-shaped waves is flush with the inside of the corrugated tube.

Vorzugsweise beträgt die Tiefe der Sollknickrille des inneren glatten Bandes maximal ein Drittel der Amplitude der Wellen des äußeren gewellten Bandes.Preferably, 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.

Vorzugsweise sind die Werkstoffe und/oder die Dicke des inneren und des äußeren Bandes verschieden. Vorzugsweise besteht das innere Band aus Edelstahl.Preferably, the materials and / or the thickness of the inner and outer bands are different. Preferably, the inner band is made of stainless steel.

Die Erfindung ist in den Zeichnungen beispielhaft dargestellt.The invention is illustrated by way of example in the drawings.

Es zeigen:

Fig. 1
eine Vorrichtung zur Herstellung eines flexiblen gewellten Bandes in Ansicht,
Fig. 2
ein äußeres gewelltes Band im Querschnitt,
Figuren 3, 4 und 5
innere glatte Bänder im Querschnitt,
Fig. 6
übereinanderliegende Bänder ohne Verformung der ineinanderliegenden Wellen im Querschnitt,
Fig. 7
die Bänder nach Fig. 6 im verformten Zustand in auseinandergezogener Darstellung,
Fig. 8
die verformten Bänder im Querschnitt und
Fig. 9
eine omega-förmig verformte Welle im Querschnitt in vergrößerter Darstellung.
Show it:
Fig. 1
a device for producing a flexible corrugated strip in view,
Fig. 2
an outer corrugated strip in cross-section,
FIGS. 3, 4 and 5
inner smooth bands in cross section,
Fig. 6
superimposed bands without deformation of the nested waves in cross section,
Fig. 7
the bands of Figure 6 in the deformed state in exploded view,
Fig. 8
the deformed bands in cross section and
Fig. 9
an omega-shaped deformed shaft in cross section in an enlarged view.

Nach Fig. 1 wird einer Vorrichtung 1 zum Herstellen eines flexiblen Wellrohres ein äußeres gewelltes Band 2 zugeführt, das von einer Vorratsrolle 3 abgezogen wird. Oberhalb des gewellten Bandes 2 wird der Vorrichtung 1 ein inneres glattes Band 4 zugeführt, das von einer Vorratsrolle 5 abgezogen wird.1, an apparatus 1 for producing a flexible corrugated tube, 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.

Die Vorrichtung 1 hat eine Wickeleinrichtung 6 aus kreisförmig am Außenumfang des zu wickelnden Wellrohres 7 angeordneten freidrehbaren Stützrollen 8, zwei an der Einlaufstelle der Bänder 2 und 4 in die Wickeleinrichtung angeordnete, an den beiden Breitseiten der Bänder angreifende, die gegenseitige Verbindung der im Rohr benachbarten Rohrwickel bewirkende, antreibbare Verbindungsrollen 9 und 10 und eine vor den Verbindungsrollen 9 und 10 angeordnete Biegerolle 14.The device 1 has a winding device 6 of circularly arranged on the outer circumference of the corrugated tube 7 to be wound freely rotating 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

Weiterhin hat die Vorrichtung 1 ein Antriebsrollenpaar 11 für dass innere glatte Band und ein Antriebsrollenpaar 12 für das äußere gewellte Band 2. Zwischen den Antriebsrollenpaaren 11 und 12 und der Biegerolle 14 sind jeweils
Rollenbandführungen 13 für das äußere gewellte Band 2 und das innere gewellte Band 4 vorgesehen. Weiterhin sind derartige Rollenbandführungen 22 in Laufrichtung der Bänder 2, 4 vor den Antriebsrollenpaaren 11 und 12 angeordnet.Furthermore, 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. Between the drive roller pairs 11 and 12 and the bending roller 14 are respectively
Roller belt guides 13 for the outer corrugated belt 2 and the inner corrugated belt 4 are provided. Furthermore, such roller belt guides 22 are arranged in the direction of the belts 2, 4 in front of the drive roller pairs 11 and 12.

Zur Herstellung eines flexiblen Wellrohres 7 werden das äußere, gleichmäßig wellenförmige Band 2 von dem Antriebsrollenpaar 12 und das innere glatte Band 4 von dem Antriebsrollenpaar 11 der Wickeleinrichtung 6 zugeführt, in den vorausgehend erzeugten Rohrwickel eingelegt und in bekannter Weise die ineinanderliegenden Wellen durch Zusammenpressen der Wellenflanken mit den Wellenscheiteln omega-förmig verformt.To produce a flexible corrugated pipe 7, the outer, uniformly wavy band 2 of the drive roller pair 12 and the inner smooth belt 4 of the drive roller pair 11 of the winding device 6, inserted in the previously generated tube winding and in a known manner, the nested waves by compressing the corrugation flanks deformed with the wave crests omega-shaped.

Die Antriebsrollenpaare 11 und 12, die die Bänder 2, 4 von den Vorratsrollen 3 und 5 abziehen, haben eine kleinere Umfangsgeschwindigkeit als die Verbindungsrollen 9 und 10, sodass die Bänder 2 und 4 unter Spannung zugeführt werden. Durch einen nicht dargestellten Exzenter kann der Abstand der einzelnen Rollen der Antriebsrollenpaare 11 und 12 verändert werden, sodass in einfacher Weise die Zufuhrspannung einstellbar ist.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. By an eccentric, not shown, 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.

Die Fig. 2 zeigt das äußere gewellte Band 2 im Querschnitt, die Figuren 3 bis 5 das innere glatte Band 4 in unterschiedlichen Ausführungsformen im Querschnitt. Nach den Figuren 3 bis 5 hat das innere glatte Band 4 an seinen Rändern bereits vorverformte Wellen 15, die den Wellen des äußeren gewellten Bandes 2 entsprechen. Dadurch wird das Einlegen der Ränder des inneren glatten Bandes 4 in die Wellen des äußeren gewellten Bandes 2 erleichtert. Außerdem ist so das innere glatte Band 4 in den Rollenbandführungen 13 und 22 exakt geführt.2 shows the outer corrugated strip 2 in cross section, Figures 3 to 5, the inner smooth band 4 in different embodiments in cross section. According to the figures 3 to 5, the inner smooth band 4 at its edges already pre-formed shafts 15 which correspond to the waves of the outer corrugated strip 2. Characterized the insertion of the edges of the inner smooth belt 4 is facilitated in the waves of the outer corrugated belt 2. In addition, the inner smooth belt 4 is exactly guided in the roller belt guides 13 and 22 so.

Wie die Figuren 3 bis 5 zeigen, hat das innere glatte Band 4 in Bandlängsrichtung verlaufende Sollknickrillen 16, die im gewickelten Rohr (Fig. 8 und 9) in der Mitte zwischen zwei Scheiteln des äußeren gewellten Bandes 2 liegen. Nach Fig. 5 und nach Fig. 8 hat das innere glatte Band 4 drei Sollknickrillen 16, nach Fig. 4 fünf Sollknickrillen 16 und nach Fig. 3 eine der Anzahl der Wellen des äußeren gewellten Bandes 2 entsprechende Anzahl von Sollknickrillen 16.As shown in FIGS. 3 to 5, the inner smooth belt 4 has predetermined bending grooves 16 running in the longitudinal direction of the belt, which lie in the wound tube (FIGS. 8 and 9) in the middle between two crests of the outer corrugated belt 2. According to FIG. 5 and FIG. 8, the inner smooth belt 4 has three predetermined bending grooves 16, according to FIG. 4 five predetermined bending grooves 16 and according to FIG. 3, a number of predetermined bending grooves 16 corresponding to the number of waves of the outer corrugated belt 2.

Die Tiefe der Sollknickrillen 16 beträgt maximal ein Drittel der Wellenamplitude des gewellten Bandes 2.The depth of the predetermined bending grooves 16 is at most one third of the wave amplitude of the corrugated strip. 2

Diese Sollknickrillen 16 gewährleisten, dass das aus dem im inneren annähernd glatten Band 4 und dem äußeren gewellten Band 2 gewickelte Wellenrohr 7 flexibel ist.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.

Beim Biegen eines gewickelten Wellrohres 7 knicken entsprechend der Biegung die Sollknickrillen 16 des inneren Bandes 4 in die Täler des äußeren gewellten Bandes 2 ein. Weiterhin kann durch die Sollknickrillen 16 das fertig gewickelte Wellrohr 7 zum Transport zusammengestaucht werden, sodass die Länge des gewickelten Rohres entsprechend verkürzt ist. Je größer die Anzahl der Sollknickrillen 16 des inneren glatten Bandes 4 ist, um so größer ist die Biegbarkeit des flexiblen Wellrohres 7 und der Betrag des Zusammenstauchens.When bending a wound corrugated tube 7 buckle according to the bending, the predetermined bending grooves 16 of the inner band 4 in the valleys of the outer corrugated tape 2 a. Furthermore, the ready-wound corrugated tube 7 can be compressed by the predetermined bending grooves 16 for transport, so that the length of the wound tube is shortened accordingly. The greater the number of predetermined bending grooves 16 of the inner smooth belt 4, the greater is the flexibility of the flexible corrugated pipe 7 and the amount of collision.

Fig. 6 zeigt die im Bereich der zu verformenden Wellen des Bandwickels ineinanderzulegenden Bänder 2, 4 in auseinandergezogener Darstellung. Der mit 17 bezeichnete Pfeil zeigt auf die vorausgehend verformte Welle des Rohrwickels, der mit 18 bezeichnete Pfeil zeigt die zu verformende Welle des Rohrwickels und der mit 19 bezeichnete Pfeil zeigt die nachfolgend zu verformende Welle.FIG. 6 shows the bands 2, 4 to be overlapped in the region of the waves of the band wound to be deformed, 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.

Wie insbesondere die Fig. 9 zeigt, sind die Wellenflanken 20 omega-förmig auf den Wellenscheitel 21 zusammengepresst, wobei der Wellenscheitel 21 flächenbündig an der Innenseite des Wellrohres liegt. Damit ist ein Eindringen von Kondensat in die omega-förmige Verbindung verhindert. Durch die abwechselnde punktförmige Verpressung der Wellenflanken 20 mit den Scheiteln 21 wird die omega-förmige Verbindung zusätzlich gesichert.As shown in particular in FIG. 9, the wave flanks 20 are compressed in an omega-shaped manner onto the wave peak 21, the wave peak 21 being 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.

Das innere glatte Band 4 kann vorteilhaft aus einem sehr dünnen korrosionsbeständigen Werkstoff bestehen, während das äußere gewellte Band 2 aus einem weniger korrisionsfesten dickeren Werkstoff besteht, sodass das äußere gewellte Band 2 das Wellrohr 7 stabilisiert. Auf diese Weise können die Werkstoffkosten verringert werden.The inner smooth band 4 can advantageously consist of a very thin corrosion-resistant material, while the outer corrugated band 2 consists of a less corrosion-resistant thicker material, so that the outer corrugated band 2 stabilizes the corrugated tube 7. In this way, the material costs can be reduced.

Durch das innere glatte Band 4 hat das Wellrohr einen wesentlich geringeren Strömungswiderstand als ein herkömmliches Wellrohr. Darüber hinaus ist das erfindungsgemäße Wellrohr sehr leicht zu reinigen.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.

Wird ein fertig gewickeltes Wellrohr in Rohrlängsrichtung gestaucht und anschließend wieder in Rohrlängsrichtung auseinandergezogen, so ergibt sich ein längeres Rohr, das im Inneren glatter als das ursprünglich ungestauchte Rohr ist.If a ready-wound corrugated tube is compressed in the tube longitudinal direction and then pulled apart again in the tube longitudinal direction, the result is a longer tube, which is smoother inside than the originally uncompressed tube.

Claims (15)

Verfahren zum Herstellen eines flexiblen, im Inneren glatten Wellrohres durch gleichzeitiges schraubenlinienförmiges Wickeln eines dünneren äußeren gewellten Bandes, vorzugsweise eines Metallbandes, und eines dünnen inneren glatten Bandes, vorzugsweise eines Metallbandes, bei dem mindestens eine Welle des unter Spannung zulaufenden äußeren gewellten Bandes unter Zwischenlage des einen Randes des unter Spannung zulaufenden inneren glatten Bandes in mindestens eine Welle des vorausgehend erzeugten Rohrwickels eingelegt und mindestens eine der ineinandergelegten Wellen durch Zusammenpressen verformt wird, dadurch gekennzeichnet, dass das innere glatte Band (4) etwa die gleiche Breite wie das äußere gewellte Band (2) hat, dass das innere glatte Band mit seinem anderen Rand in die nachfolgend durch Zusammenpressen zu verformende Welle des Rohrwickels eingelegt wird und dass das innere glatte Band mindestens eine in Bandlängsrichtung verlaufende Sollknickrille (16) hat, die im Rohrwickel in der Mitte zwischen zwei Wellenscheiteln des äußeren gewellten Bandes verläuft.A method for producing a flexible, internally smooth corrugated tube by simultaneously helically winding a thinner outer corrugated strip, preferably a metal strip, and a thin inner smooth strip, preferably a metal strip, wherein at least one shaft of the tensioned outer corrugated strip with interposition of the an edge of the tensioned inner smooth band is inserted into at least one shaft of the previously produced tube coil and at least one of the nested waves is deformed by compression, characterized in that the inner smooth band (4) has approximately the same width as the outer corrugated band (4) 2) has that the inner smooth band is inserted with its other edge in the subsequent by compression to be deformed shaft of the tube winding and that the inner smooth band has at least one extending in the tape longitudinal direction predetermined bending groove (16) in the tube Winding in the middle between two wave crests of the outer corrugated tape runs. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Ränder des inneren glatten Bandes (4) im Bereich der durch Zusammenpressen zu verformenden Wellen vorgeformte Wellen (15) haben.A method according to claim 1, characterized in that the edges of the inner smooth band (4) have preformed corrugations (15) in the region of the shafts to be deformed by compression. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Wellenflanken (20) der omega-förmig verformten Wellen abwechselnd im Abstand punktförmig mit den Wellenscheiteln (21) der verformten Wellen zusammengepresst werden.A method according to claim 1 or 2, characterized in that the wave flanks (20) of the omega-shaped waves are alternately compressed pointwise at a distance with the wave crests (21) of the deformed waves. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Wellenscheitel (21) der verformten Wellen flächenbündig an der Innenseite des Wellrohres (7) liegt.Method according to one of claims 1 to 3, characterized in that the wave crest (21) of the deformed waves is flush with the inside of the corrugated tube (7). Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 4, mit einem an den Breitseiten des äußeren gewellten Bandes (2) angreifenden Antriebsrollenpaar (12) zur Zufuhr des gewellten Bandes unter Spannung, einer dem Antriebsrollenpaar des äußeren gewellten Bandes nachfolgenden Rollenbandführung (13), mit einem an den Breitseiten des inneren glatten Bandes (4) angreifenden Antriebsrollenpaar (11) zur Zufuhr des inneren glatten Bandes (4) unter Spannung, mit einer dem Antriebsrollenpaar (11) des inneren glatten Bandes nachfolgenden Rollenbandführung (13), sowie einer Wickeleinrichtung (6) mit kreisförmig am Außenumfang eines Bandwickels des zu wickelnden Rohres angeordneten, freidrehbaren Stützrollen (8), zwei an der Einlaufstelle der Bänder in die Wickeleinrichtung angeordneten, jeweils an den Breitseiten der Bänder angreifenden, die gegenseitige Verbindung der im Rohr benachbarten Bandwickel bewirkenden, antreibbaren Verbindungsrollen (9) und (10) und einer zwischen den Rollenbandführungen (13) und den Verbindungsrollen (9) und (10) angeordneten Biegerolle (14).Device for carrying out the method according to one of Claims 1 to 4, having a drive roller pair (12) acting on the broad sides of the outer corrugated belt (2) for supplying the corrugated belt under tension, a roller belt guide (13) following the drive roller pair of the outer corrugated belt. with a drive roller pair (11) acting on the wide sides of the inner smooth belt (4) for feeding the inner smooth belt (4) under tension, with a roller belt guide (13) following the drive roller pair (11) of the inner smooth belt, and with a winding device (6) arranged with circular on the outer circumference of a band roll of the tube to be wound, freely rotatable support rollers (8), two arranged at the inlet point of the bands in the winding device, each acting on the broad sides of the bands, causing the mutual connection of the adjacent band in the tube winding, drivable connecting rollers (9) and (10) and egg ner between the roller belt guides (13) and the connecting rollers (9) and (10) arranged bending roller (14). Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Zufuhrspannung der Bänder (2, 4) durch die Antriebsrollenpaare (11, 12) einstellbar ist.Apparatus according to claim 5, characterized in that the supply voltage of the bands (2, 4) by the drive roller pairs (11, 12) is adjustable. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die Antriebsrollenpaare (11, 12) eine etwas kleinere Umfanggeschwindigkeit als die Verbindungsrollen (9, 10) haben.Apparatus according to claim 6, characterized in that the drive roller pairs (11, 12) have a slightly smaller peripheral speed than the connecting rollers (9, 10). Vorrichtung nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass zur Regelung der Zufuhrspannung der Bänder (2, 4) der Abstand der beiden Rollen jedes Antriebsrollenpaares (11, 12) über einen Exzenter einstellbar ist.Apparatus according to claim 6 or 7, characterized in that for controlling the supply voltage of the belts (2, 4), the distance between the two rollers of each drive roller pair (11, 12) via an eccentric is adjustable. Vorrichtung nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass den Antriebsrollenpaaren (11, 12) Rollenbandführungen (22) vorgeordnet sind.Device according to one of claims 6 to 8, characterized in that the drive roller pairs (11, 12) roller band guides (22) are arranged upstream. Nach den Verfahrensansprüchen 1 bis 4 hergestelltes flexibles Wellrohr aus einem schraubenlinienförmig gewickelten äußeren gewellten Band (2) und einem inneren glatten Band (4), bei dem die an den Rändern der Bänder ineinander liegenden Wellen durch Zusammenpressen verformt sind und bei dem das innere glatte Band mindestens eine in Bandlängsrichtung verlaufende Sollknickrille (16) hat, die im Bandwickel in der Mitte zwischen zwei Wellenscheiteln des äußeren gewellten Bandes liegt.A flexible corrugated tube made of a helically wound outer corrugated strip (2) and an inner smooth strip (4) produced according to the method claims 1 to 4, in which the waves intermeshed at the edges of the strips are deformed by compression and in which the inner smooth strip has at least one running in the tape longitudinal direction predetermined bending groove (16) which lies in the tape roll in the middle between two wave crests of the outer corrugated tape. Wellrohr nach Anspruch 10, dadurch gekennzeichnet, dass die Wellenflanken (20) der omega-verformten Wellen abwechselnd im Abstand punktförmig mit den Wellenscheiteln (21) der verformten Wellen zusammengepresst sind.Corrugated pipe according to claim 10, characterized in that the corrugation flanks (20) of the omega-deformed waves are compressed alternately at a point in a point-like manner with the wave crests (21) of the deformed corrugations. Wellrohr nach Anspruch 10 oder 11, dadurch gekennzeichnet, dass der Wellenscheitel (21) der omega-förmig verformten Wellen flächenbündig an der Innenseite des Wellrohres (7) liegt.Corrugated pipe according to claim 10 or 11, characterized in that the apex of the wave (21) of the omega-shaped deformed waves is flush with the inside of the corrugated pipe (7). Wellrohr nach einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, dass die Tiefe der Sollknickrillen (16) des inneren glatten Bandes (4) maximal ein Drittel der Amplitude der Wellen des äußeren gewellten Bandes (2) beträgt.Corrugated pipe according to one of claims 10 to 12, characterized in that the depth of the predetermined bending grooves (16) of the inner smooth strip (4) is at most one third of the amplitude of the waves of the outer corrugated strip (2). Wellrohr nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, dass die Werkstoffe und/oder Dicke des inneren und des äußeren Bandes (2, 4) verschieden sind.Corrugated pipe according to one of claims 10 to 13, characterized in that the materials and / or thickness of the inner and the outer band (2, 4) are different. Wellrohr nach einem der Ansprüche 10 bis 14, dadurch gekennzeichnet, dass das innere Band (4) aus Edelstahl besteht.Corrugated pipe according to one of claims 10 to 14, characterized in that the inner band (4) consists of stainless steel.
EP05021761A 2004-10-12 2005-10-06 Method of manufacturing a flexible, on the inside smooth, corrugated pipe, and a corrugated pipe manufactured thereby Active EP1647340B1 (en)

Applications Claiming Priority (1)

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DE102004049766A DE102004049766B3 (en) 2004-10-12 2004-10-12 Method and apparatus for producing a flexible, smooth inside corrugated pipe, and a corrugated pipe produced by the method

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AT (1) ATE386597T1 (en)
DE (2) DE102004049766B3 (en)
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Publication number Priority date Publication date Assignee Title
DE102009034628A1 (en) 2009-07-24 2011-02-03 Fritz Hahn Gmbh & Co Kg Method for applying insulation on pipe, involves helically winding-up insulating tape on rotating pipe, where rotating pipe is moved according to inclination in pipe longitudinal direction
DE202011104565U1 (en) * 2011-08-18 2012-11-19 Witzenmann Gmbh Winding hose with torsional fixation

Citations (6)

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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
US4616495A (en) * 1982-05-27 1986-10-14 Rib Loc Hong Kong Limited Helically-formed pipe winding machine
DE4201859A1 (en) * 1992-01-24 1993-07-29 Hahn Fritz Gmbh Co Kg Flexible corrugated tube - consists of thin steel band with smooth inner lining, leading edge of which is locked between waveforms of adjacent band windings

Patent Citations (7)

* 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
US4616495A (en) * 1982-05-27 1986-10-14 Rib Loc Hong Kong Limited Helically-formed pipe winding machine
DE4201859A1 (en) * 1992-01-24 1993-07-29 Hahn Fritz Gmbh Co Kg Flexible corrugated tube - consists of thin steel band with smooth inner lining, leading edge of which is locked between waveforms of adjacent band windings
DE4201859C2 (en) 1992-01-24 1997-03-06 Hahn Fritz Gmbh Co Kg Method and device for producing a flexible, internally smooth corrugated tube

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DE502005002895D1 (en) 2008-04-03
PT1647340E (en) 2008-06-02
DE102004049766B3 (en) 2006-06-08
ES2298903T3 (en) 2008-05-16
ATE386597T1 (en) 2008-03-15

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