WO2019014746A1 - Tuyau enroulable avec ondulations à angle minimal - Google Patents

Tuyau enroulable avec ondulations à angle minimal Download PDF

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Publication number
WO2019014746A1
WO2019014746A1 PCT/CA2018/000143 CA2018000143W WO2019014746A1 WO 2019014746 A1 WO2019014746 A1 WO 2019014746A1 CA 2018000143 W CA2018000143 W CA 2018000143W WO 2019014746 A1 WO2019014746 A1 WO 2019014746A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
inner layer
corrugation
wall
corrugations
Prior art date
Application number
PCT/CA2018/000143
Other languages
English (en)
Inventor
Manfred A. A. Lupke
Stefan A. Lupke
Original Assignee
Lupke Manfred Arno Alfred
Lupke Stefan A
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 Lupke Manfred Arno Alfred, Lupke Stefan A filed Critical Lupke Manfred Arno Alfred
Publication of WO2019014746A1 publication Critical patent/WO2019014746A1/fr

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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated
    • 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/20—Double-walled hoses, i.e. two concentric hoses

Definitions

  • the present invention relates to coilable corrugated pipes. More specifically, the present invention relates to a coilable double-wall corrugated pipe that is coilable even at large diameters.
  • Double walled corrugated pipes provide good hydraulic flow and are more cost-effective than solid (i.e. non-corrugated) plastic or concrete alternatives. Additionally, corrugated pipes are more flexible than non-corrugated alternatives, and are thus able to accommodate some deflection that would damage a more rigid pipe (for example, limited deflections during installation or natural ground movement that may occur after installation) .
  • a corrugated pipe has regularly spaced annular peaks and valleys along its outer wall, which form the corrugations .
  • a typical double-wall corrugated pipe has an outer corrugated wall and a smooth inner wall forming an inner tube that is attached to the inner side of the valleys and extends in the length of the pipe .
  • the outer corrugated layer is formed first by
  • the present invention provides a double walled
  • corrugated pipe with an outer wall that has
  • corrugations with sides that are minimally angled relative to a pipe' s radial plane and that is thus flexible enough to adapt to pipe flexing and bending without significantly sacrificing the structural integrity of the corrugated pipe.
  • the sides of the corrugations form an angle less than 10° with a radial plane of the pipe.
  • the angled corrugations allow for separation of the pipe from the mold blocks while allowing for some bending deformation.
  • a flexible inner layer is fused to the inside of the corrugations and this inner layer can fold or bend into the inner portion of corrugations and/or bulge out to the inner part of the pipe.
  • the pipe is made of standard polyolefins, and when unflexed, has the structural integrity characteristics of a typical pipe formed of the same materials.
  • the present invention provides a double wall pipe
  • annular peaks being regularly spaced along a longitudinal axis of said pipe, and with successive annular valleys between the annular peaks, said annular peaks and valleys being
  • deformable inner layer said inner layer being attached to said outer wall within said outer wall at said annular valleys and bridging between said side segments, wherein the side segments form an angle of less than 10° with a radial plane of said pipe, said radial plane being perpendicular to said longitudinal axis of said pipe and the flexible inner layer formed to accommodate bending of the pipe.
  • Figure 1 is a side cross-sectional view of a length of the double walled pipe when straight;
  • Figure 2 is a side cross-sectional view of a length of the pipe when flexed or coiled showing the different deformations of the outside tensioned wall relative to the compressed inside wall;
  • Figure 2A shows the lines of bending in the pipe of Figure 2;
  • Figure 3 is a side cross-sectional view of a length of the pipe, flexed or coiled to a greater degree than in Figure 2;
  • Figure 3A shows the lines of bending in the pipe of Figure 3.
  • a double wall corrugated pipe 3 is illustrated in side cross-section, with a reference line marking the pipe's longitudinal axis 5.
  • a single corrugation 10 has a rounded, flat, peaked or double crowned crest 15, a valley 20, and two side segments 30.
  • the angle 40 is the angle formed by one of the side segments 30 and a radial plane 55 perpendicular to the longitudinal axis 5.
  • the corrugation is preferably symmetrical, i.e., the angles formed by each side segment 30 and the radial plane all correspond and the corrugations are repeated and joined to each other.
  • the pipe configuration is consistent as shown in Figure 1.
  • the inside diameter of the pipe is marked by reference arrow 50.
  • the inside diameter 50 is the distance across the interior of the pipe when a flexible inner layer 60 is neither folded into a corrugation nor bulged outward into the interior of the pipe 3: i.e., the approximate inside diameter is the distance between dotted reference lines 70A and 70B.
  • the inner layer bows slightly into a corrugation as shown and, due to this shape, will deform into the corrugation cavity when the corrugation is compressed due to bending, as shown in Figures 2 and 3.
  • the inner layer 60 is flexible or deformable to allow folding or bending of the inner layer into a
  • the flexible inner layer 60 can also bulge outwards into the interior of the pipe of the inside diameter 50.
  • the flexible inner layer may be formed to have a bias causing folding in a particular direction by a combination of control of the air pressure between the inner layer and the outer layer and of the air pressure between the inner layer and the forming mandrel under the inner layer in relation to the atmospheric pressure. The final pressure is reached once the pipe and the air inside the corrugation has cooled and any responsive wall deformation (due to pressure differential) has occurred.
  • the angle 40 can be between 1° and 10° without impeding the pipe's flexibility or
  • the steep orientation of the walls allows for outward pivoting of the walls of the corrugation to accommodate tension (outer wall) and a reverse direction of pivoting of the sidewalls of the
  • Figure 2 shows a side cross-sectional view of the pipe
  • the flexible inner layer 60 behaves in three different ways, as illustrated by representative corrugations 80A, 80B, and 80C.
  • corrugation 80A the flexible inner layer 60 is stretched so that it is neither folded into the corrugation nor is it bulged outwards. Any formed curve of the flexible inner layer may be straightened.
  • corrugation 80B the flexible inner layer 60 folds into the corrugation so that the excess material does not hinder flexibility.
  • corrugation 80C the excess material of the flexible inner layer 60 has bulged outwards from the corrugation and into the interior of the pipe 3, again allowing the pipe to flex or coil.
  • the range of flexibility demonstrated by the flexible inner layer 60 allows the corrugated outer wall to stretch or compress in response to coiling and flexing.
  • the preferred inward curved wall across a corrugation cavity has a preferred length of at least 10% relative to a non-curved wall. Curving of the wall assists in both controlled compression deformation as well as providing length that
  • the depth of the curved wall across a corrugation relative to the length of the chord is 10 to 25%.
  • inward curving of the wall provides the bias direction for deforming of the wall into a corrugation when the corrugation sidewalls are moved inwardly.
  • the term "flexible” is used to describe the ability of the inner layer to accommodate deformation due to stretching or compression.
  • the wall shape and material selection assists in responding by appropriate deformation and is consistent around the pipe circumference allowing for any angle of bending.
  • Figure 2 shows the corrugated outer wall stretching and compressing in response to the flexing or coiling of the pipe 3.
  • the corrugations on the convex side of Figure 2, noted as 1A, have stretched out to move with the convex inner layer.
  • the corrugations on the concave side, side IB have compressed into each other, in an "accordion-style" fold.
  • Figure 3 shows a side cross-sectional view of the pipe
  • This pipe can be manufactured using conventional
  • the inner wall can be biased into or out of the corrugation to provide a bias the direction for deformation. Having the inner wall curved into the corrugation is preferred.
  • the inner layer and the outer wall can be made of the same material or of different materials.
  • the inner layer and the outer wall may both be formed of polyethylene (PE), polyphenylene ether (PPE), polypropylene (PP), or other plastics, or the inner layer may be formed of one plastic while the outer ' wall is formed of another.
  • the best choice of material depends on the intended use of the pipe.
  • the thickness of the inner layer can be reduced to assist in deformation and the material selected to be tolerant of the bending.
  • this pipe When uncoiled or unflexed, this pipe generally has all the structural integrity of a typical double-walled pipe made of the same materials while be more tolerant of bending deformation, as described .
  • the double wall thickness at each valley 20 is much stiffer than the single thickness inner wall layer 60 that bridges across side segments 30.
  • the material selected to extrude the inner wall layer 60 can be chosen to accommodate tensioning on the outer wall of the pipe when bent and controlled buckling to accommodate compression at the inner wall of the pipe relative to the bend.
  • the length of this inwardly curved segment is preferably at least 10% greater than if this segment was straight .
  • the present coilable double wall pipe provides advantages in installation and allows for a non-straight installation path.
  • Connectors typically are more prone to damage and/or installation issues. Reducing the number of connectors simplifies installation and reduces potential problems. Some curvature of the installation path allows continuous pipe to be installed with less connectors. Large coils of pipe also provide
  • corrugation when the pipe is straight, has the advantage of providing a direction of buckling into the corrugation as well as allowing the wall to straighten at the outside bend as it is placed in tension.
  • This particular shaping of the inner wall layer automatically provides these advantages regardless of the bend direction. More inward curving of the wall provides additional deformation
  • the flow characteristics of the pipe may be less desirable as the inner wall layer is less straight. A balance between these features is possible and can be made based on the particular pipe application .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

L'invention concerne un tuyau ondulé comprenant une paroi externe présentant des ondulations à angle minimal qui est ainsi suffisamment flexible pour s'adapter à des déformations de tuyau dues à l'enroulement sans sacrifier une quantité significative d'intégrité structurale. Les côtés des ondulations forment un angle inférieur à 10° avec un plan radial du tuyau. Le tuyau comprend une couche interne flexible qui peut se plier dans la cavité d'ondulation et/ou faire saillie vers l'extérieur de la partie interne du tuyau. Le tuyau est fabriqué à partir de polyoléfines standard, et lorsqu'il est fléchi, présente les caractéristiques d'intégrité structurale d'un tuyau classique formé du même matériau.
PCT/CA2018/000143 2017-07-20 2018-07-20 Tuyau enroulable avec ondulations à angle minimal WO2019014746A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762535051P 2017-07-20 2017-07-20
US62/535,051 2017-07-20

Publications (1)

Publication Number Publication Date
WO2019014746A1 true WO2019014746A1 (fr) 2019-01-24

Family

ID=65014862

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2018/000143 WO2019014746A1 (fr) 2017-07-20 2018-07-20 Tuyau enroulable avec ondulations à angle minimal

Country Status (1)

Country Link
WO (1) WO2019014746A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113682133A (zh) * 2020-05-19 2021-11-23 住友理工株式会社 树脂加料管及其制造方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6186182B1 (en) * 1998-01-08 2001-02-13 Seongho Csp., Ltd. Double-walled spiral pipe
CA2307785A1 (fr) * 2000-05-08 2001-11-08 Manfred A. A. Lupke Moule de tuyau muni de multiples sources d'alimentation en plastique
EP1724508A2 (fr) * 2005-05-19 2006-11-22 Zehnder Verkaufs- und Verwaltungs AG Tuyau
EP2019242A2 (fr) * 2007-07-23 2009-01-28 FRÄNKISCHE ROHRWERKE GEBR. KIRCHNER GmbH & Co KG Tuyau et association de deux tuyaux de ce type
US20090206595A1 (en) * 2008-02-14 2009-08-20 Lupke Manfred A A Double walled corrugated pipe section with pipe coupling
CN202203542U (zh) * 2011-08-29 2012-04-25 长春高祥特种管道有限公司 一种pe双壁柔性波纹管
CA2857699A1 (fr) * 2014-07-23 2016-01-23 Manfred A. A. Lupke Amelioration de la regulation de la pression d'air d'une onduleuse

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6186182B1 (en) * 1998-01-08 2001-02-13 Seongho Csp., Ltd. Double-walled spiral pipe
CA2307785A1 (fr) * 2000-05-08 2001-11-08 Manfred A. A. Lupke Moule de tuyau muni de multiples sources d'alimentation en plastique
EP1724508A2 (fr) * 2005-05-19 2006-11-22 Zehnder Verkaufs- und Verwaltungs AG Tuyau
EP2019242A2 (fr) * 2007-07-23 2009-01-28 FRÄNKISCHE ROHRWERKE GEBR. KIRCHNER GmbH & Co KG Tuyau et association de deux tuyaux de ce type
US20090206595A1 (en) * 2008-02-14 2009-08-20 Lupke Manfred A A Double walled corrugated pipe section with pipe coupling
CN202203542U (zh) * 2011-08-29 2012-04-25 长春高祥特种管道有限公司 一种pe双壁柔性波纹管
CA2857699A1 (fr) * 2014-07-23 2016-01-23 Manfred A. A. Lupke Amelioration de la regulation de la pression d'air d'une onduleuse

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113682133A (zh) * 2020-05-19 2021-11-23 住友理工株式会社 树脂加料管及其制造方法
CN113682133B (zh) * 2020-05-19 2023-12-12 住友理工株式会社 树脂加料管及其制造方法

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