WO2021013427A1 - Conduite de fluide pouvant être chauffée électriquement et son procédé de fabrication - Google Patents

Conduite de fluide pouvant être chauffée électriquement et son procédé de fabrication Download PDF

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Publication number
WO2021013427A1
WO2021013427A1 PCT/EP2020/065945 EP2020065945W WO2021013427A1 WO 2021013427 A1 WO2021013427 A1 WO 2021013427A1 EP 2020065945 W EP2020065945 W EP 2020065945W WO 2021013427 A1 WO2021013427 A1 WO 2021013427A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid line
electrically conductive
electrical contact
contact lines
conductive elastomer
Prior art date
Application number
PCT/EP2020/065945
Other languages
German (de)
English (en)
Inventor
Florent Spieler
Guido Bernd Finnah
Joerg Bettenhausen
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2021013427A1 publication Critical patent/WO2021013427A1/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
    • F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
    • F16L53/30—Heating of pipes or pipe systems
    • F16L53/35—Ohmic-resistance heating
    • F16L53/37—Ohmic-resistance heating the heating current flowing directly through the pipe to be heated
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon

Definitions

  • the invention is based on an electrically heatable fluid line according to the preamble of the independent claim.
  • hoses must be heated regularly in the case of freezable media, in particular in order to thaw media in the form of fluids, especially in the form of liquids, or to keep them warm inside. In this way, for example, hoses carrying water can be prevented from freezing and the hoses from bursting due to the ice pressure can be avoided. In hoses that are not permanently heated, the medium can be thawed again in order to convey the medium, i.e. in particular a
  • Spray process can be produced. It is also known from DE 10 2012 212 798 A1 that conductor tracks can also be formed by overmolding during an injection molding process. Disclosure of the invention
  • Characteristic features of the independent claim has the advantage of ensuring simple surface-distributed heatability without impairing the flexible routability of the line in different spatial directions.
  • the fluid line is advantageously flexible or bendable. It becomes possible to bend such a fluid line freely, in particular to bend it freely, without jeopardizing a consistently good electrical contact of the wall material serving as a heating resistor.
  • the figure shows in
  • Partial figure b shows a cross section through a fluid line.
  • the figure shows in part a) a longitudinal sectional view and in part b) a cross-sectional view of an electrically heatable fluid line 1.
  • Part b) shows a cross section at the point that is highlighted in part a) with the markings A and A ' .
  • the electrically heatable fluid line surrounds a fluid-tight space 2 through which a fluid, for example an aqueous urea solution, water or even a gas, can be passed on.
  • a fluid for example an aqueous urea solution, water or even a gas
  • the fluid line is designed as a hose line with a round cross section.
  • a necessary component of the wall of the fluid line according to the invention is a layer 5 made of an electrically conductive elastomer, which, if necessary from a technical point of view, optionally, as shown in the figure, on the outside 10 of the wall and / or on its inside 12 with an outside Insulation layer 11 or an inner insulation layer 13 can be covered.
  • the insulation function of the insulation layers is an electrical one, for example to avoid an electrical current between the wall and an electrically conductive fluid that is supposed to flow or flow in the fluid line.
  • At least two electrical contact lines 7 and 9 are provided. These extend along the spatial course of the fluid line, which is provided for the transport or forwarding of the fluid from a first location to a second location. This allows the electrically conductive elastomer, which has a greater specific resistance than the electrical
  • the electrically heated fluid line can also be provided at least at one end with a connection component 15, which here is designed as a hose nozzle.
  • This connection component can in particular, as shown here, be designed so that there is a
  • Fluid connection 18 and electrical connections or connection pins 17 for the Contacting the electrical contact lines 7 and 9 combined that is, designed as a hydraulic or pneumatic connection with an integrated electrical plug (or optionally - as not shown here - an integrated electrical socket).
  • the fluid connection 18 is fluidically connected to the fluid-carrying space 2 of the fluid line via a feedthrough 20 through the body of the connection component. In the example shown this is
  • the locking plug 22 of the connecting component 15 is locked in a fluid-tight manner on the wall of the fluid line except for the bushing 20.
  • connection lines protrude beyond the front end of the wall and lead into the connection component in order to be electrically connected there to the connection pins 17, which serve as plug contacts.
  • the expansion ring 24 on the fluid connection 18 for locking a connectable further fluid line which can also be constructed differently, or for locking another hydraulic or pneumatic component, can also be omitted if other measures for the fluid-tight connection of the fluid line to the further fluid line or other components are sufficient.
  • a hose nozzle can also be fastened to the wall of the fluid line using a clamp.
  • the wall of the fluid line can also be encapsulated with a thermoplastic material at the end in order to fix the connecting component formed thereby on the wall and at the same time to electrically isolate the electrical contact lines at the end.
  • a thermoplastic material at the end in order to fix the connecting component formed thereby on the wall and at the same time to electrically isolate the electrical contact lines at the end.
  • Connection nozzle or hose nozzle or the connection component can also be welded on.
  • the electrical contact lines can be designed as stranded wires.
  • the electrical contact lines can extend in the direction of the hose
  • the electrical contact lines can be arranged essentially on opposite sides of the wall.
  • the electrical contact lines can extend helically along the course of the fluid line.
  • Contact lines can advantageously be embedded in the electrically conductive elastomer, that is to say in the area of the wall of the fluid line be surrounded on all sides by the electrically conductive elastomer.
  • the electrical contact lines can be designed as metallic stranded wires.
  • Contact lines or stranded wires only serve to distribute the electrical current over the length of the hose. Joule heat is generated around the circumference of the hose, which heats the medium inside.
  • Adhesion promoter can be achieved.
  • the adhesion promoters can be applied to the electrical contact lines or the metallic strands before the hose is manufactured, or they can be added to the elastomer material.
  • adhesion promoters are silanes, aluminates, titanates, zirconates and modified polyolefins such as chlorinated polypropylene.
  • the electrically conductive elastomer consists, for example, of a
  • volume percent in particular in particular between 30 to 50
  • the matrix material can be an elastomer, e.g. an ethylene-propylene-diene rubber (“EPDM”), a silicone or an acrylonitrile-butadiene rubber (“NBR”), and a thermoplastic elastomer.
  • EPDM ethylene-propylene-diene rubber
  • NBR acrylonitrile-butadiene rubber
  • thermoplastic elastomer e.g. an ethylene-propylene-diene rubber
  • HNBR Hydrogenated acrylonitrile butadiene rubber
  • FKM fluororubber
  • the Fillers can be, for example, carbon blacks, graphites, metal particles or carbon nanotubes or mixtures of such electrically conductive fillers.
  • the fillers that guarantee electrical conductivity are kept in constant positions and permanently have the same electrical properties (in particular specific electrical
  • the surfaces of the electrical contact lines can also be activated
  • Corona treatment take place. This ensures even better adhesion to the electrically conductive elastomer.
  • an adhesion promoter can also be designed to be electrically conductive.
  • These are in particular materials such as the above-mentioned silanes, aluminates, etc., to which electrically conductive particles have been added, such as carbon black, graphite, metallic fibers or metallic particles, carbon nanotubes and / or silver powder.
  • the described insulation layers can consist of the same or a different material as the matrix material.
  • the electrically heatable fluid lines or hoses can be extruded.
  • the electrical contact lines or stranded wires can be incorporated into the elastomer and / or the insulation layers can also be applied.
  • Air inclusions between the extruded layers and the strands are eliminated when an extrusion process is used. A profiling or It is not necessary to press the hose over the cross section shown in partial figure b).
  • Another advantage of the invention is that the heatable fluid line only requires a power supply from one of the ends.
  • the other end can also be sealed with respect to the electrical contact.
  • the invention can be used for fluid lines in the context of exhaust gas aftertreatment of internal combustion engines, in particular for the hydraulics of liquid reducing agents for denitrifying the exhaust gases of the internal combustion engine.
  • the invention can be used in fluid hoses for fuel cells.

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Heating (AREA)
  • Pipe Accessories (AREA)

Abstract

Conduite de fluide (1) pouvant être chauffée électriquement, destinée à acheminer un fluide, en particulier un liquide, caractérisée en ce qu'une paroi (3) de la conduite de fluide contient un élastomère (5) électriquement conducteur.
PCT/EP2020/065945 2019-07-24 2020-06-09 Conduite de fluide pouvant être chauffée électriquement et son procédé de fabrication WO2021013427A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019210958.6A DE102019210958A1 (de) 2019-07-24 2019-07-24 Elektrisch beheizbare Fluidleitung und Verfahren zu deren Herstellung
DE102019210958.6 2019-07-24

Publications (1)

Publication Number Publication Date
WO2021013427A1 true WO2021013427A1 (fr) 2021-01-28

Family

ID=71096679

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/065945 WO2021013427A1 (fr) 2019-07-24 2020-06-09 Conduite de fluide pouvant être chauffée électriquement et son procédé de fabrication

Country Status (2)

Country Link
DE (1) DE102019210958A1 (fr)
WO (1) WO2021013427A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ309077B6 (cs) * 2014-10-06 2022-01-19 Berndorf Band Gmbh Způsob zhotovování kovového pásu, kovový pás a zařízení pro zhotovování kovového pásu
WO2023232339A1 (fr) * 2022-06-01 2023-12-07 Robert Bosch Gmbh Procédé de production d'un élément chauffant et élément chauffant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009085352A (ja) * 2007-09-28 2009-04-23 Tokai Rubber Ind Ltd 電熱ホース及び電熱配管ホース
DE102012212798A1 (de) 2011-12-22 2013-06-27 Robert Bosch Gmbh Heizelement und Verfahren zu dessen Herstellung sowie Verwendung des Heizelementes
DE102013223910A1 (de) * 2013-11-22 2015-05-28 Contitech Ag Flexibler, mehrschichtiger, beheizbarer Schlauch
EP3035771A1 (fr) * 2014-12-17 2016-06-22 ContiTech AG Structures plates en polymere electroconductrices

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009085352A (ja) * 2007-09-28 2009-04-23 Tokai Rubber Ind Ltd 電熱ホース及び電熱配管ホース
DE102012212798A1 (de) 2011-12-22 2013-06-27 Robert Bosch Gmbh Heizelement und Verfahren zu dessen Herstellung sowie Verwendung des Heizelementes
DE102013223910A1 (de) * 2013-11-22 2015-05-28 Contitech Ag Flexibler, mehrschichtiger, beheizbarer Schlauch
EP3035771A1 (fr) * 2014-12-17 2016-06-22 ContiTech AG Structures plates en polymere electroconductrices

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ309077B6 (cs) * 2014-10-06 2022-01-19 Berndorf Band Gmbh Způsob zhotovování kovového pásu, kovový pás a zařízení pro zhotovování kovového pásu
WO2023232339A1 (fr) * 2022-06-01 2023-12-07 Robert Bosch Gmbh Procédé de production d'un élément chauffant et élément chauffant

Also Published As

Publication number Publication date
DE102019210958A1 (de) 2021-01-28

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