WO2011047394A1 - Tube composite - Google Patents

Tube composite Download PDF

Info

Publication number
WO2011047394A1
WO2011047394A1 PCT/AT2010/000293 AT2010000293W WO2011047394A1 WO 2011047394 A1 WO2011047394 A1 WO 2011047394A1 AT 2010000293 W AT2010000293 W AT 2010000293W WO 2011047394 A1 WO2011047394 A1 WO 2011047394A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
tube
composite pipe
insulating layer
core tube
Prior art date
Application number
PCT/AT2010/000293
Other languages
German (de)
English (en)
Inventor
Raimund Rockenbauer
Original Assignee
Isoplus Fernwärmetechnik Gesellschaft M.B.H.
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 Isoplus Fernwärmetechnik Gesellschaft M.B.H. filed Critical Isoplus Fernwärmetechnik Gesellschaft M.B.H.
Publication of WO2011047394A1 publication Critical patent/WO2011047394A1/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
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/143—Pre-insulated pipes

Definitions

  • This invention relates to a composite pipe for heat-insulated conducting a medium, wherein the composite tube comprises a core tube, a jacket tube, an insulating layer for thermal decoupling of the core tube and the jacket tube and optionally at least one foil, wherein in the composite tube at least one passing gases, the insulating layer At least in some areas surrounding shut-off layer is provided.
  • a composite tube for heat-insulated conducting a medium is described for example in AT002992U1.
  • WO2004 / 029501A1 cites a composite tube which comprises a film which is arranged between the insulating layer and the core tube or the jacket tube as a sliding layer.
  • EP2003388A2 describes a composite pipe, which consists of a DämmMechwandung of a fibrous material. Compared with the invention discussed below, the composite pipe described in EP2003388A2 has the disadvantage that the production of the composite pipe is more complicated because of the necessary production of the DämmMechwandung of the fibrous material,
  • WO03058112 describes a constructive element comprising a foam, which foam is finished liquid and gas tight by rigid elements. It is the object of the invention discussed herein to provide a composite tube, wherein the insulating layer has a high thermal insulation capability over a long period of time.
  • the insulating layers used in the prior art have the disadvantage that gases escape from the polyurethane foam, for example.
  • the escape of the gases entails that the thermal insulation of the polyurethane foam is reduced after a certain period of time.
  • the barrier layer consists of a plastic such as polyethylene in combination with a metal such as aluminum or of a plastic such as polyethylene in combination with another plastic such as polyamide or polypropylene.
  • the barrier used in the invention prevents the escape of gases, in particular the noble gases from the insulating layer and thus prevents a reduction in the thermal conductivity of the insulating layer and a slowing down the aging process of the insulating layer.
  • the passage of water vapor through the shut-off layer arranged according to the invention may be possible in the event that water vapor emerges from the core tube by diffusion, for example from a core tube made of plastic.
  • the blocking layer according to the invention can be applied to shut-off layers additionally arranged in the composite tube, which cover the insulating layer at least in partial areas, or to elements such as core tube and jacket tube, which are arranged adjacent to the insulating layer.
  • a possible embodiment of the composite tube according to the invention may be that the barrier layer is a coating of a surface of the core tube and / or the jacket tube, which coating is extruded or laminated on the surface of the core tube in at least partial areas.
  • a film may be arranged in the composite pipe according to the invention, wherein the blocking layer is a coating of a surface of the at least one film, which coating is extruded or laminated onto the surface of the film in at least partial regions.
  • the film preferably envelops the insulating layer. It is by no means excluded in the context of this invention that the film envelops individual part of the insulating layer.
  • the barrier layer can consist of the material known from plastics such as polyethylene and / or metals such as aluminum or another material known to those skilled in the art, which material prevents the passage of gases through the shut-off layer arranged according to the invention and if necessary permits the passage of water vapor through the shut-off layer arranged according to the invention.
  • So-called partially sealed composite pipes which have the property that water vapor, but no gas mixture can diffuse through a core tube made of a plastic, comprise at least one barrier layer of a plastic such as polyethylene or polypropylene.
  • So-called density Composite tubes which have the property that neither water vapor nor a gas mixture can diffuse out of the core tube may comprise at least one barrier layer of metal or a metal mixture.
  • a coating applied to a carrier film by means of extrusion can be distinguished by the fact that the coating has no discontinuities such as, for example, bubbles. Such a discontinuity would allow the escape of gases from the insulating layer in a partial area.
  • a coating which, under certain conditions such as, for example, a predetermined temperature range, has properties which permit the escape of certain gases.
  • the composite tube according to the invention may comprise an adhesive layer, which adhesive layer brings about an adhesive bond of the core tube with the insulating layer and / or with the film and / or the jacket tube with the insulating layer and / or with the film.
  • the adhesive layer may be applied to at least one of the surfaces of the core tube, the jacket tube, the insulating layer or the film and may optionally be embodied in one piece with the barrier layer.
  • the application of the adhesive layer to said elements of the composite pipe can be accomplished by means of extrusion or laminating techniques known to those skilled in the art.
  • the adhesive layer is applied to the inside of the film to be laid around the insulating layer and thus causes a good bond of the film with the insulating layer.
  • the adhesive layer is heated Condition to cause adhesion of the adhesive layer, wherein after cooling of the adhesive layer, the adhesive bond is not soluble.
  • the temperature range can be increased by foaming the insulating material, by extruding the jacket tube.
  • the adhesive layer may be such that adhesive bonding is not solvable by heating the adhesive layer after previous cooling the adhesive bond.
  • the invention disclosed herein does not preclude making the adhesive bond through the adhesive layer higher than that during manufacture of a prior art composite pipe as defined above.
  • the adhesive layer may comprise a copolymer consisting of ethylene, butyl acrylate, maleic anhydride.
  • the composition of the adhesive layer according to the invention is not limited to the specified substances.
  • the barrier layer may be bonded to the surface of the insulating layer or adjacent to the insulating layer.
  • Composite tubes which have a core tube and a jacket tube made of plastic, can be rolled up on a tube roll. Due to the consequent relative displacement between substantially casing tube and core tube, the barrier is connected to the insulating layer neither with the core tube nor with the jacket tube non-positively.
  • the barrier layer can serve as a sliding layer between the core tube and insulation layer or insulation layer and jacket tube.
  • a possible embodiment of the composite pipe according to the invention may be that at least a part of the film in an overlapping region of the film is connected to a further part of the film.
  • Overlapping regions are arranged, for example, parallel to the longitudinal axis or radially about the longitudinal axis of the composite tube, wherein the overlapping region can be connected by known methods such as gluing, welding, so as to ensure a tightness of the film can.
  • the film may for example comprise a further coating such as a thermoplastic or an adhesive layer, which is able to enter into a connection with the insulating layer.
  • This coating can be integrally formed with the coating, which according to the invention prevents passage of the steam, integrally formed.
  • the compound mentioned here can be prepared by known methods such as welding or gluing.
  • the composite pipe according to the invention may be designed so that at least a portion of the film with the core tube and / or the jacket tube is non-positively connected in at least partial areas.
  • the film may, for example, comprise a further coating which is able to make a connection with the insulating layer.
  • This coating may be integrally formed with the coating, which, according to the invention, prevents gases from passing through.
  • the compound mentioned here can be made by known methods such as ultrasonic welding, heating element welding or gluing.
  • a possible embodiment of the composite tube according to the invention may be that the core tube and the jacket tube consist of a material selected from plastics, metals and metal alloys, independently of each other.
  • a bond can be produced between the film and the core tube and / or the jacket tube.
  • the composite tube according to the invention may comprise a second core tube or a plurality of core tubes. It may prove to be advantageous in this case that the core tubes are non-positively connected to each other, so that, for example, a displacement of the tubes to each other in a production sub-process of the composite tube is prevented. Likewise, a plurality of first core tubes, which have a small diameter, are arranged inside a second core tube.
  • the composite tube according to the invention may have at least one measuring means for detecting discontinuities.
  • the at least one measuring device for detecting the discontinuities may be integrally formed with the core tube and / or the jacket tube and / or the insulating layer and / or the foil.
  • a discontinuity may be in the form of, for example, a crack or a leak in the core tube or jacket tube, the foil or the insulating layer.
  • the coating which prevents the escape of gases from the insulating layer according to the invention, may be damaged.
  • the composite pipe according to the invention may be formed such that at least one coating of the film has sliding properties on its surface and thus serves as a sliding layer between the insulating layer and the core pipe and / or jacket pipe, at least in some areas.
  • the arrangement of these sliding layers can serve to minimize any stresses in the composite pipe. Such stresses can be caused, for example, by the different thermal properties of the materials used in the composite tube in a thermal load of the composite tube.
  • the composite pipe may comprise so-called relief zones in which a coating with sliding properties is arranged.
  • the invention does not exclude that the coating, which has sliding surface properties, with the coating according to the invention, which prevents passage of the gases, integrally formed.
  • a possible embodiment of the composite pipe according to the invention is that the film and the coating to be applied, which prevents gases from passing through, are integrally formed.
  • the film may, for example, be a film consisting of plastics such as polyethylene and / or metals such as aluminum or another material known to a person skilled in the art, which material prevents the passage of gases through the shut-off layer arranged according to the invention and optionally the passage of water vapor through the shut-off layer arranged according to the invention allowed.
  • the approach discussed here also relates to the method for producing a composite pipe, which comprises a core pipe, a jacket pipe, an insulating layer and optionally a separating layer, wherein the core pipe is introduced into the jacket pipe and a space which is defined by the core pipe and the jacket pipe, is filled mainly by an insulating layer, wherein a barrier layer is applied to a surface of the film and / or the core tube and / or the jacket tube, which shut-off layer is a coating of a plastic such as polyethylene in combination with a metal such as aluminum or a plastic such as polyethylene in combination with another plastic such as polyamide or polypropylene.
  • the application of the coating can be carried out in one of the preparation of the composite tube temporally upstream operation or during the production of the composite pipe.
  • the method according to the invention can be distinguished by the fact that the coating material used is a plastic such as polyethylene in combination with a metal such as aluminum or a plastic such as polyethylene in combination with another plastic such as polyamide or polypropylene.
  • So-called partially dense composite pipes, through which water vapor but no gas mixture can diffuse, comprise at least one separating layer of a plastic such as polyethylene in combination with a metal such as aluminum or a plastic such as polyethylene in combination with another plastic such as Polyamide or polypropylene.
  • So-called dense composite pipes, through which neither water vapor nor a gas mixture can diffuse, comprise at least one separating layer of metal or a metal mixture.
  • the method according to the invention may comprise sub-steps such that the shut-off layer is connected to at least partial regions of the core tube and / or of the jacket tube.
  • the coating can be extruded on at least portions of the core tube and / or the jacket tube.
  • the invention discussed herein includes both coating of the core tube or jacket tube prior to and during manufacture of the composite tube.
  • the methods given here by way of example for applying the barrier layer or coating can be used depending on the requirements of the coating in partial areas of the core tube or the jacket tube.
  • the method according to the invention may also comprise sub-steps, wherein the blocking layer is connected to at least partial regions of the film. Furthermore, the coating can be extruded onto at least portions of the film.
  • the production of the composite pipe according to the invention may comprise the coating of the film.
  • coated film may be used to make the composite pipe.
  • the inventive method for producing a composite pipe may also include the step that at least in some areas, the insulating layer with the core tube and / or the jacket tube is non-positively connected.
  • the composite produced in this way can on the one hand increase the statics since, in the case of a direct or indirect bond between core tube and jacket tube, the composite tube as a whole acts like a sandwich construction. The latter can be advantageous during transport and during the laying of composite pipes.
  • the composite can be produced in order to ensure a complete, the escape of gases suppressing enclosure of the insulating layer.
  • a non-positive bond can be produced for example by means of known welding methods.
  • the inventive method for producing a composite pipe may include at least that at least in some areas, the film with the insulating layer and / or the core tube and / or the jacket tube is non-positively connected.
  • Such a force-locking composite can be produced for example by means of welding processes.
  • the method according to the invention for producing a composite pipe strand or a composite pipe may also include checking the composite pipe strand or the composite pipe, in particular the core pipe and / or the jacket pipe and / or the insulating layer and / or optionally the film on discontinuities.
  • Figure 1 shows an alternative embodiment of a composite pipe according to the invention, wherein a film is arranged with a coating in the composite pipe.
  • Figure 2 shows an alternative embodiment of a composite pipe according to the invention, wherein the jacket tube comprises a coating.
  • Figure 1 shows a composite tube 1 for heat-insulated conducting a medium comprising a core tube 2, in which the medium such as hot water or crude oil is passed, an insulating layer 3, a jacket tube 5 and a film 4, for heat-insulated conducting a medium in the composite tube 1 at least one passing or passing of gases preventing, the insulating layer 3 is provided at least in some areas surrounding shut-off, which shut-off layer of polyethylene in combination with a metal such Aluminum is made.
  • the barrier layer may allow passage of water vapor.
  • the blocking layer is a coating 6 ', 6 "of a surface of the film 4 made of polyethylene, for example the film 4 extruded.
  • the composite pipe 1 further comprises an adhesive layer by means of which an adhesive bond of the insulating layer 3 with the film 4 can be produced.
  • the adhesive layer is formed integrally with the barrier layer.
  • the adhesive layer is made of the components ethylene, butyl acrylate and maleic acid hydride.
  • the adhesive layer can be activated by heat in the production of the composite tube and creates a compound which is not soluble after cooling of the adhesive layer.
  • the core tube 2 is made of plastic.
  • the jacket tube 5 may consist of the same material as the core tube 2.
  • the impact of the film is carried out in the embodiment shown in Figure 1 as an overlapping region 8, in which a part of a first film 4 is connected to another part of a second film 4, so that a tightness of the film is ensured in this area.
  • the film 4 can serve as a sliding layer between the insulating layer 3 and the jacket tube 5 in some areas.
  • the film 4 depending on the requirements or expected loads, in particular expected thermal loads sliding surface properties.
  • a wire is further arranged as a measuring means 7 for the detection of discontinuities.
  • the wire can be integrally formed with the insulating layer 3, wherein examined by means of arranged in the insulating layer 3 measuring means 7, the core tube 2, the film 4, the insulating layer 3 and the jacket tube 5 on discontinuities such as damage, cracks, fatigue of the materials used can be.
  • FIG. 2 shows a composite pipe 1 for heat-insulated conducting of a medium, the composite pipe comprising a core tube 2, a jacket tube 5 and an insulating layer 3 for thermal decoupling of the core tube 2 and the jacket tube 5, wherein the composite tube 1 comprises a coating 6 ', 6 "applied to the core tube 2 and / or to the jacket tube 5, and comprises a property which prevents gases from passing through.
  • Figure 3 shows a composite pipe 1, which consists of two core tubes 2, 2 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Thermal Insulation (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un tube composite 1 servant au transport thermiquement isolé d'un fluide, le tube composite 1 comprenant un tube intérieur 2, un tube extérieur 5, une couche isolante 3 séparant thermiquement le tube intérieur 2 et le tube extérieur 3, et le cas échéant au moins un film 4. Le tube composite présente au moins une couche barrière entourant au moins dans certaines zones la couche isolante et empêchant le passage de gaz, la couche barrière étant constituée d'une matière plastique, telle que le polyéthylène, combinée à un métal tel que l'aluminium, ou d'une matière plastique, telle que le polyéthylène, combinée à une autre matière plastique telle que le polyamide ou le polypropylène.
PCT/AT2010/000293 2009-10-21 2010-08-11 Tube composite WO2011047394A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1648/09 2009-10-21
AT16482009A AT509015A1 (de) 2009-10-21 2009-10-21 Verbundrohr

Publications (1)

Publication Number Publication Date
WO2011047394A1 true WO2011047394A1 (fr) 2011-04-28

Family

ID=43242977

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2010/000293 WO2011047394A1 (fr) 2009-10-21 2010-08-11 Tube composite

Country Status (2)

Country Link
AT (1) AT509015A1 (fr)
WO (1) WO2011047394A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015054713A1 (fr) * 2013-10-14 2015-04-23 Ke Kelit Kunststoffwerk Gesellschaft M.B.H. Tuyau, en particulier tuyau de chauffage urbain

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5867883A (en) * 1994-05-02 1999-02-09 Itt Industries, Inc. Extruded multiple plastic layer coating bonded to the outer surface of a metal tube having an optional non-reactive inner layer and process for making the same
AT2992U1 (de) 1998-02-20 1999-08-25 Isoplus Fernwaermetechnik Ges Verfahren zum herstellen von verbundrohren und nach diesem verfahren hergestellte rohre
US6148866A (en) * 1995-09-28 2000-11-21 Fiberspar Spoolable Products, Inc. Composite spoolable tube
WO2003058112A1 (fr) 2002-01-10 2003-07-17 Al.P.S.R.L. Module de construction de systeme de transport pour milieu aeriforme
US20040058111A1 (en) * 2002-09-23 2004-03-25 Saint-Gobain Performance Plastics Corp. Compounded nylon 6, nylon 12 material for air brake systems
WO2004029501A1 (fr) 2002-09-25 2004-04-08 Løgstør Rør A/S Conduite isolee et procede de fabrication d'une conduite isolee
EP2003388A2 (fr) 2007-06-14 2008-12-17 Joachim Luther Element d'isolation calorifuge et procédé de fabrication d'un tel élément

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5867883A (en) * 1994-05-02 1999-02-09 Itt Industries, Inc. Extruded multiple plastic layer coating bonded to the outer surface of a metal tube having an optional non-reactive inner layer and process for making the same
US6148866A (en) * 1995-09-28 2000-11-21 Fiberspar Spoolable Products, Inc. Composite spoolable tube
AT2992U1 (de) 1998-02-20 1999-08-25 Isoplus Fernwaermetechnik Ges Verfahren zum herstellen von verbundrohren und nach diesem verfahren hergestellte rohre
WO2003058112A1 (fr) 2002-01-10 2003-07-17 Al.P.S.R.L. Module de construction de systeme de transport pour milieu aeriforme
US20040058111A1 (en) * 2002-09-23 2004-03-25 Saint-Gobain Performance Plastics Corp. Compounded nylon 6, nylon 12 material for air brake systems
WO2004029501A1 (fr) 2002-09-25 2004-04-08 Løgstør Rør A/S Conduite isolee et procede de fabrication d'une conduite isolee
EP2003388A2 (fr) 2007-06-14 2008-12-17 Joachim Luther Element d'isolation calorifuge et procédé de fabrication d'un tel élément

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015054713A1 (fr) * 2013-10-14 2015-04-23 Ke Kelit Kunststoffwerk Gesellschaft M.B.H. Tuyau, en particulier tuyau de chauffage urbain

Also Published As

Publication number Publication date
AT509015A1 (de) 2011-05-15

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