EP2979018A1 - Conduite de fluide équipée d'un dispositif chauffe-raccord - Google Patents

Conduite de fluide équipée d'un dispositif chauffe-raccord

Info

Publication number
EP2979018A1
EP2979018A1 EP14712211.3A EP14712211A EP2979018A1 EP 2979018 A1 EP2979018 A1 EP 2979018A1 EP 14712211 A EP14712211 A EP 14712211A EP 2979018 A1 EP2979018 A1 EP 2979018A1
Authority
EP
European Patent Office
Prior art keywords
connector
media line
line according
heating
heating device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14712211.3A
Other languages
German (de)
English (en)
Inventor
Matthias Hoff
Harald Riedel
Bernd Rietsch
Ulli Sammet
Jürgen Damberg
Lutz Görmer
Michael Weber
Michael Schöbel
Peter Michels
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rehau Automotive SE and Co KG
Original Assignee
Rehau AG and Co
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 Rehau AG and Co filed Critical Rehau AG and Co
Publication of EP2979018A1 publication Critical patent/EP2979018A1/fr
Withdrawn legal-status Critical Current

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
    • F16L53/38—Ohmic-resistance heating using elongate electric heating elements, e.g. wires or ribbons

Definitions

  • the invention relates to a media line, in particular for transporting a urea-water solution, with
  • a heating device for heating the medium
  • hose line must be designed to be heatable, in which case a fast thawing of the frozen urea-water solution standing in the hose line must be ensured, especially during a cold start of the motor vehicle at very low outside temperatures.
  • the heating device for heating the medium is usually wound spirally around the hose line. Although this ensures sufficient heating of the hose line, but in the Re- gel hereby in the field of connectors no satisfactory heating can be realized.
  • the connectors are arranged at one or both ends of the hose and serve for liquid-tight connection of the hose to an aggregate, for example a tank container for the urea-water solution or for connection to a further media line or to a nozzle for injection Solution in the combustion gases.
  • an aggregate for example a tank container for the urea-water solution or for connection to a further media line or to a nozzle for injection Solution in the combustion gases.
  • the heating of the connector takes place via a heating wire wound around the connector.
  • guide elements for the wire winding are provided on the connector.
  • Connector heater according to the prior art has the disadvantage that the mounting of the heating wire on the connector is comparatively expensive and not faulty winding despite the proposed guide elements local overheating, which can cause system failure, can not be safely ruled out.
  • a large wire projection is required for electrical contacting of the heating wire on both sides. This additional wire length must be positioned after contacting in a holding element to exclude mechanical damage to the joint.
  • the present invention seeks to provide a media line with the features described above, which is structurally simple and can be mounted with little effort, while ensuring uniform heating in the region of the connector.
  • the object is achieved in that the connector heater has an elastically deformable clamping member which is pushed in the elastically deformed state on the connector and fixed by its clamping action on the connector.
  • the clamping principle according to the invention it is possible, on the one hand, to mount this on the connector by a simple elastic deformation of the clamping component.
  • the pushing on of the clamping component in the elastically deformed state can take place here axially or alternatively also radially.
  • the clamping component After pushing the clamping component onto the connector, the force for elastic deformation of the clamping component is withdrawn and due to its geometry, which is matched to the geometry of the connector, the clamping component clamps on the outer surface of the connector Connector firmly, so that this alone a secure mounting of the clamping member is ensured on the connector.
  • the teaching of the invention is further characterized in that due to the clamping member no Thompsonleiterschreibnot are required. In addition to the saving of Schuleiterermaterial therefore required according to the prior art protection of wire projections from mechanical damage during operation accounts.
  • the clamping component is expediently surrounded by an outer encapsulation in order to protect the connector heater from mechanical damage and at the same time to reduce heat losses.
  • the clamping member is a heating element of the connector heater and is for this purpose connected to an electrical power source. In the context of the invention, it is also the case that the connector heating device consists of the elastically deformable clamping component.
  • the clamping member on a claw-shaped geometry, wherein the width of the mouth opening is changed by an elastic deformation of the clamping member.
  • the width of the mouth opening is increased so far that a trouble-free sliding of the clamping member is possible on the connector. In the case of an axial pushing, a comparatively small expansion is generally sufficient.
  • the width of the mouth opening must be greater than the outer diameter of the
  • the clamping member may have lever arms, via which the force required to expand the clamping member can be applied.
  • the clamping component is designed as a molded part, preferably stamped and subsequently bent.
  • This has the advantage that the clamping component with low production costs, especially at high volumes, can be produced.
  • the punching process also allows the production of a comparatively complex geometry, so that the molded part can be tailored very precisely to the specific application.
  • the curvature of the molded part can be adapted exactly to the geometry of the connector to be overlapped, so that the desired clamping action of the molded part is ensured in the assembled state.
  • the molding is formed meander-shaped. This ensures a very uniform heating of the connector via an energization of the molded part, without there being any risk of overheating.
  • the meander shape ensures the desired flexibility which is required for the elastic deformation of the clamping component during assembly. ge is required, while still ensuring the required inherent stability of the clamping member so that it is permanently secured securely and firmly by the clamping action on the connector after installation.
  • the molding on several meander loops is expediently not more than 1 mm, for example 0.1-0.5 mm.
  • the molding is formed as a single-layer sheet metal part. This makes it possible, a comparatively large heating power in
  • the molded part is designed to be multi-layered and in this case has an outer layer of an electrical insulation material, preferably plastic, as well as a metallic inner layer.
  • an electrical insulation material preferably plastic
  • a metallic inner layer may in this embodiment have a very thin layer thickness and e.g. be formed film-like, so that even with a high applied electrical voltage introduced into the connector area heating power does not lead to overheating.
  • the required mechanical stability is ensured by the electrically non-conductive outer layer.
  • the metal layer and the outer layer may be cohesively, e.g. be connected by means of an adhesive.
  • connection lugs for electrical contacting. These connection lugs can easily be taken into account when determining the punching geometry.
  • electrical lines are preferably connected, via which the energization and thus the heating of the sheet metal part takes place.
  • the connecting drives can expediently simultaneously serve as lever arms for the above-described widening of the clamping component.
  • a material for the elastically deformable clamping component is in particular a spring-hard metal alloy, so that the necessary restoring force is ensured to ensure the clamping effect.
  • the metal must also have a comparatively high electrical resistance in order to ensure effective heating of the connector.
  • the clamping member may also be formed as a spiral spring.
  • the spiral spring expediently has at least one spiral-shaped heating wire for connector heating and at least one spiral-shaped spring wire for providing the clamping effect.
  • the heating wire and the spring wire are provided together with a, preferably also helical, electrically insulating sheath, which may for example consist of plastic.
  • the elastically deformable clamping member is thus designed as a plastic spiral, which has in its interior both a soul for the electrical heating and a soul for the mechanical stability of the coil spring.
  • the hose line has at least one resistance heating wire, preferably wound spirally around the hose line.
  • this heating wire is surrounded on the outside by an insulating layer to reduce heat losses.
  • This outer insulation layer may be formed, for example, as a corrugated tube and is suitably made of plastic.
  • Heating device for the hose are electrically connected in parallel or alternatively in series.
  • the media line according to the invention finds particular use in the transport of a urea-water solution, which is added in motor vehicles combustion exhaust gases from engines, especially diesel engines.
  • FIG. 1 is a partial side view of a media line according to the invention
  • Fig. 2a, 2b are three-dimensional representations of the media line shown in Fig. 1 and 3a, 3b a connector heater according to the invention in a single representation in a plan view or three-dimensional view.
  • Fig. 1 shows a detail of a media line, which is provided for transporting a urea-water solution 1 in a diesel motor vehicle.
  • the urea-water solution 1 is added to the combustion exhaust gases to reduce the nitrogen oxide emissions.
  • the media line has a polymeric hose line 2 for media transport (see Fig. 2a), a (not shown) heating device for heating the medium 1 and at the hose line end a connector 3 for liquid-tight connection of the hose 2 to an aggregate.
  • This aggregate can be, for example, a reservoir for the urea-water solution, a further media line or even a nozzle for injecting the solution into the exhaust gas flow.
  • Figures 1, 2a and 2b show only one end of the media line according to the invention. The other end of the media line can be designed analogously for this purpose.
  • an electrically operated connector heater 4 is provided on the connector 3 for heating.
  • the connector heater 4 has an elastically deformable clamping member 5, which is pushed in the elastically deformed state on the connector 3 and fixed by its clamping action on the connector 3.
  • the clamping component 5 is a heating element of the Kciinektor- heater 4 and is for this purpose connected via electrical wires 7 to a (not shown) electrical power source.
  • the connector heating device 4 consists of the elastically deformable clamping component 5.
  • FIGS. 1, 2 a, 2 b show the clamping member 5 in a single representation. It can be seen that the clamping component 5 has a claw-shaped geometry. The width W of the mouth opening is variable by an elastic deformation of the clamping member 5. By widening the clamping component 5, it is possible to easily postpone this to the connector 3. If the force required for widening the clamping component 5 is withdrawn, the clamping component 5 clamps firmly on the outer surface of the connector 3 and is thereby securely connected to it (compare FIGS. 1, 2 a, 2 b). After assembly, the clamping component 5 is encased with an outer encapsulation (not shown) in order to protect the connector heating device 4 from mechanical damage and at the same time to reduce heat losses.
  • an outer encapsulation not shown
  • the clamping member 5 is formed as a stamped and then bent sheet metal part. Furthermore, it can be seen that the sheet metal part 5 is designed meandering.
  • the sheet metal part 5 has two connecting lugs 6 for electrical contacting. As can be seen from FIGS. 1, 2a and 2b, the ends 6 of the electric wires 7 are respectively connected to the lugs 6, so that the lugs 5 can be supplied with current via the lugs 6 and thus heated.
  • the connection of the electrical wires 7 to the terminal lugs 6 can be done via a soldering or welding process.
  • the electric wires 7 are connected to an electrical connector 8.
  • the sheet metal part advantageously has a thickness of 0.1 to 0.5 mm.
  • the thickness s 0.3 mm.
  • the width bi of the meander-shaped sections 9 is 0.5-3 mm, for example 1-2 mm.
  • the sheet metal part has a plurality of meander loops 11.
  • the meander loops 11 each have two meandering sections 9.
  • the axial distance b 2 between two meandering sections 9 is 0.2 to 10 mm, in particular 0.5 to 5 mm, for example 1 to 4 mm.
  • the sheet-metal part 5 consists of a metal alloy adapted to the intended use in terms of electrical resistance and corrosive load capacity.
  • the heating device for heating the hose line 2 has a resistance heating wire wound spirally around the hose line 2.
  • This resistance heating wire is not shown in detail in the figures. However, it can be seen in particular in FIG. 2 a that the hose line 2 is surrounded by an outer jacket in the form of a corrugated hose 10. This also encloses the lovedsflowerdraht and thus serves as a mechanical protection for this.
  • the corrugated hose is a thermal insulation to ensure the most complete transfer of the heat energy emitted by the heating wire to the hose 2 and thus to the located in the hose 2 urea-water solution 1.
  • the connector heating device 4 and the resistance heating wire spirally wound around the hose line 2 are electrically connected in parallel.
  • the clamping member 5 is formed as a single-layer sheet metal part.
  • the clamping member 5 is formed as a multi-layer molded part and in this case has an outer layer of an electrical insulation material, preferably plastic, and a metallic inner layer.
  • the inner layer can be coated with a very small layer be provided thick, wherein the mechanical stability of the entire clamping member 5 is ensured by the outer layer.
  • the small layer thickness of the metal layer allows a dosage of the introduced heating power, so that overheating in the connector area is avoided even at a high voltage applied to the connector heater 4 electrical voltage, with an adjustment of the heating power can be done on the choice of the layer thickness of the metallic inner layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Heating (AREA)
  • Pipe Accessories (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne une conduite de fluide, en particulier servant à transporter une solution aqueuse d'urée (1), comprenant un flexible (2) de transport du milieu, un système chauffant servant à chauffer le milieu (1), au moins un raccord (3) disposé à une extrémité du flexible et servant à raccorder le flexible (2) de manière étanche aux liquides à un groupe, et un dispositif chauffe-raccord (4), de préférence électrique, servant à chauffer le raccord (3). Selon l'invention, le dispositif chauffe-raccord (4) comporte un composant de serrage (5) déformable élastiquement qui se glisse à l'état déformé élastiquement sur le raccord (3) et qui se fixe par son action de serrage sur le raccord (3).
EP14712211.3A 2013-03-25 2014-03-24 Conduite de fluide équipée d'un dispositif chauffe-raccord Withdrawn EP2979018A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202013101265.3U DE202013101265U1 (de) 2013-03-25 2013-03-25 Medienleitung
PCT/EP2014/000795 WO2014154350A1 (fr) 2013-03-25 2014-03-24 Conduite de fluide équipée d'un dispositif chauffe-raccord

Publications (1)

Publication Number Publication Date
EP2979018A1 true EP2979018A1 (fr) 2016-02-03

Family

ID=50349572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14712211.3A Withdrawn EP2979018A1 (fr) 2013-03-25 2014-03-24 Conduite de fluide équipée d'un dispositif chauffe-raccord

Country Status (4)

Country Link
EP (1) EP2979018A1 (fr)
DE (1) DE202013101265U1 (fr)
RU (1) RU2015145326A (fr)
WO (1) WO2014154350A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015104387U1 (de) 2015-08-19 2016-11-22 Rehau Ag + Co. Medienleitung
DE202015105640U1 (de) 2015-10-23 2017-01-24 Rehau Ag + Co Medienleitung
DE102018213013A1 (de) * 2018-08-03 2020-02-06 Thermocoax Isopad Gmbh Heizvorrichtung zur Beheizung einer Rohrleitung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3544589C2 (de) * 1985-12-17 1994-01-13 Wolf Woco & Co Franz J Heizbares Element einer Scheibenwaschanlage für Kraftfahrzeuge
DE50206662D1 (de) * 2002-06-27 2006-06-08 Dbk David & Baader Gmbh Heizvorrichtung für Fluiddurchführungen und Montageverfahren
ES2236398T3 (es) * 2002-06-27 2005-07-16 DAVID & BAADER DBK SPEZIALFABRIK ELEKTRISCHER APPARATE UND HEIZWIDERSTANDE GMBH Dispositivo de calentamiento para un conducto y procedimiento de construccion.
ATE330165T1 (de) * 2004-01-23 2006-07-15 Dbk David & Baader Gmbh Heizclip für eine fluidleitung
EP1985908B2 (fr) 2007-04-26 2018-09-19 Voss Automotive GmbH Liaison câblée pour tansfer de fluides
DE202008015289U1 (de) * 2008-11-18 2010-04-08 Voss Automotive Gmbh Leitungsverbinder für Medienleitungen
DE202009012230U1 (de) * 2009-06-23 2010-11-04 Voss Automotive Gmbh Elektrisch beheizbare Medienleitung sowie Leitungsverbinder
WO2011139898A1 (fr) * 2010-04-29 2011-11-10 Parker-Hannifin Corporation Ensemble tubage et raccord chauffé à l'électricité et destiné à des systèmes de réduction catalytique sélective (scr)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014154350A1 *

Also Published As

Publication number Publication date
WO2014154350A1 (fr) 2014-10-02
RU2015145326A (ru) 2017-05-16
DE202013101265U1 (de) 2014-06-26

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