EP2611999A1 - Pipe - Google Patents

Pipe

Info

Publication number
EP2611999A1
EP2611999A1 EP11743782.2A EP11743782A EP2611999A1 EP 2611999 A1 EP2611999 A1 EP 2611999A1 EP 11743782 A EP11743782 A EP 11743782A EP 2611999 A1 EP2611999 A1 EP 2611999A1
Authority
EP
European Patent Office
Prior art keywords
pipe
inner tube
pipe according
volume
cavernous body
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Withdrawn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
EP11743782.2A
Other languages
German (de)
French (fr)
Inventor
Florian Loschitz
Martin Klein
Martin Hielscher
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.)
Deutz AG
Original Assignee
Deutz AG
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 Deutz AG filed Critical Deutz AG
Publication of EP2611999A1 publication Critical patent/EP2611999A1/en
Withdrawn legal-status Critical Current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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/027—Throttle passages
    • F16L55/02754—Throttle passages using a central core throttling the passage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
    • 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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/10—Means for stopping flow from or in pipes or hoses
    • F16L55/12—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ
    • F16L55/128—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose
    • F16L55/132—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose the closure device being a plug fixed by radially deforming the packing
    • F16L55/134—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose the closure device being a plug fixed by radially deforming the packing by means of an inflatable packing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L3/00—Arrangements of valves or dampers before the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/14—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/20—Measuring temperature entrant temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/28—Fail safe preventing flash-back or blow-back
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/02—Air or combustion gas valves or dampers
    • F23N2235/06—Air or combustion gas valves or dampers at the air intake
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Definitions

  • Such pipes are known, for example, from burner systems for the regeneration of diesel particulate filters (DPF).
  • DPF diesel particulate filters
  • check valves are used to prevent backflow.
  • this object is achieved in that a pipe, in particular in the air supply system of particular provided with intake and / or control electronics engine is used, wherein the inner tube and / or the inner tube surface has at least one inner tube diameter changing element. It is advantageous that a backflow can be prevented by the change in the inner tube diameter, in particular the reduction of the same.
  • the inner tube surface has at least one volume-variable cavernous body, which has the advantage, with respect to undesired backflows, that it can thereby be prevented.
  • the tube has at least one temperature sensor. Such a temperature sensor has the advantage that the occurrence of hot backflows can be reliably detected by regular temperature monitoring.
  • a further development according to the invention provides that the tube has at least two mutually movable elements.
  • the advantage of this at least two mutually movable parts is that the pipe cross-section can thus be reliably closed, so that unwanted backflow can be prevented.
  • volume-variable cavernous body in particular comprises foamable elements.
  • foamable elements are that they can reliably and quickly protect a pipe cross section from hot backflow.
  • the foamable elements contain water, which is released in the case of foaming for cooling and protection of the tube.
  • the volume-variable cavernous body (3) and / or the temperature sensor (10) communicate with the intake system and / or the control electronics (12) of the internal combustion engine. It is advantageous that by the communication of the sensor with the vehicle electronics z. B. in the on-board computer or the fault memory of the vehicle or the corresponding device with internal combustion engine an error message can be entered if z. B. a certain temperature has been exceeded, which then allows conclusions about a backflow and can issue a maintenance recommendation.
  • the tube has a connection and the change in volume of the cavernous body takes place by means of gas and / or liquid, which flows in or out via the connection.
  • the advantage lies the ability to use media for cross-section change originating from the engine environment.
  • a further development according to the invention provides that the volume change of the swelling body or temperature is temperature-dependent.
  • the device can thus be protected against overheating and damage.
  • the element in the tube has an air and / or liquid impermeable and / or temperature resistant and / or foamable layer.
  • a layer may advantageously consist of an intumescent substance.
  • substances are also referred to as intumescent agents.
  • foaming these form an insulating layer as a heat brake and release gases when exposed to heat, resulting in a foamed ash layer, the z. B. prevents the spread of harmful backflows by completely sealing the cross section. During the intumescence water is released, which has a cooling effect.
  • a layer can be, for example, 1 mm thick, which then foams to about 50 mm in the case of intumescence.
  • Figure 1 shows the principle of installation before tripping.
  • the arrows show the regular flow direction ("cold gas").
  • FIG. 2 the triggering situation ("hot gas" in the opposite direction)
  • Figure 5 shows a section through a pipe
  • Figure 6 is a schematic representation of a built-pipe
  • FIG. 2 shows the triggering situation of the swelling body 1 when hot gas 4 flows in the opposite direction through the pipe 2.
  • FIG. 3 the triggering of the swelling body 5 by the hot gas flow 4 is disclosed.
  • a backflow of hot gas should be effectively prevented by the closure of the inner tube 2 by means of cavernous bodies 1, 5.
  • FIG. 4 illustrates the final situation of the conduit 2 closed by swelling bodies 6, so that the hot gas 4 is prevented from flowing back through the inner tube 2.
  • the cavernous body 6 has reached its final shape via the stages of erectile tissue 1 of FIG. 1 and cavernous body 5 of FIG.
  • the tubular insert 1 is made of z. B. foamable Schwellianumaterial shown in the inner tube 2.
  • the inner tube 2 remains closed until the next workshop visit in order to avoid damage to the compressor 9, which can be seen in FIG.
  • a perforated plate 16 is arranged at the end of the inner tube 2, a perforated plate 16, which is to prevent foam particles can get into the pipe between the burner 7 and compressor 9.
  • the arrangement of tube 2 in the air supply system of a burner system for exhaust aftertreatment is shown in FIG. 6.
  • FIG. 6 discloses an inner tube 2 as part of a tube 14 as a main air line of a burner system for regeneration of a DPF 8 with a swelling body 1, 5, 6, as shown for example in FIGS. 1 to 5, in a system between internal combustion engine 13 and diesel particulate filter 8 (DPF).
  • DPF diesel particulate filter 8
  • the tube 14 is arranged between the burner 7 and the compressor 9 and has a temperature sensor 10 directly in front of the burner 7.
  • the burner 7 opens into the exhaust tract 1 1, which is arranged between the engine 13 and diesel particulate filter 8.
  • the control electronics 12 communicates with the temperature sensor 10 and the terminal 15.
  • the swelling body shown in FIGS. 1 to 5 is filled with gaseous or liquid media via the control electronics 12 by means of a control signal induced by the temperature sensor 10 become.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Thermal Insulation (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

A pipe, in particular in the air supply system of internal combustion engines which are provided, in particular, with an intake system and/or control electronics, is described, wherein the internal pipe and/or the internal pipe surface (1) have/has at least one element (1, 5, 6) which changes the diameter (2) of the internal pipe and/or the cross-sectional area of the internal pipe.

Description

Rohr  pipe
B E S C H R E I B U N G DESCRIPTION
Derartige Rohre sind beispielsweise bekannt aus Brennersystemen zur Regeneration von Diesel-Partikelfiltern (DPF). In diesen Rohren werden zur Verhinderung von RückStrömungen Rückschlagventile eingesetzt. Such pipes are known, for example, from burner systems for the regeneration of diesel particulate filters (DPF). In these pipes check valves are used to prevent backflow.
Daran ist nachteilig, dass derartige Rückschlagventile zu einem signifikanten Druckverlust im regulären Betrieb führen. This is disadvantageous in that such check valves lead to a significant pressure drop during normal operation.
Es ist die Aufgabe der vorliegenden Erfindung, die oben genannten Nachteile zu verhindern und ein Rohr zu schaffen, das RückStrömungen bei vertretbarem Druckverlust wirksam verhindert. It is the object of the present invention to obviate the above drawbacks and to provide a pipe which effectively prevents backflows with reasonable pressure loss.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass ein Rohr, insbesondere im Luftversorgungssystem von insbesondere mit Ansaugsystem und/oder Steuerelektronik versehenen Brennkraftmaschinen zum Einsatz kommt, wobei das Innenrohr und/oder die Innenrohroberfläche wenigstens ein den Innenrohrdurchmesser veränderndes Element aufweist. Hierbei ist von Vorteil, dass durch die Veränderung des Innenrohrdurchmessers, insbesondere die Verringerung desselben, eine Rückströmung verhindert werden kann. According to the invention this object is achieved in that a pipe, in particular in the air supply system of particular provided with intake and / or control electronics engine is used, wherein the inner tube and / or the inner tube surface has at least one inner tube diameter changing element. It is advantageous that a backflow can be prevented by the change in the inner tube diameter, in particular the reduction of the same.
Eine weitere erfindungsgemäße Weiterbildung sieht vor, dass die Innenrohroberfläche wenigstens einen volumenveränderbaren Schwellkörper aufweist, was bezüglich unerwünschter Rückströmungen den Vorteil aufweist, dass diese dadurch unterbunden werden können. In einer anderen erfindungsgemäßen Weiterbildung ist vorgesehen, dass das Rohr wenigstens einen Temperatursensor aufweist. Ein derartiger Temperatursensor hat den Vorteil, dass durch eine regelmäßige Temperaturüberwachung das Auftreten von heißen RückStrömungen zuverlässig detektiert werden kann. A further development according to the invention provides that the inner tube surface has at least one volume-variable cavernous body, which has the advantage, with respect to undesired backflows, that it can thereby be prevented. In another embodiment of the invention it is provided that the tube has at least one temperature sensor. Such a temperature sensor has the advantage that the occurrence of hot backflows can be reliably detected by regular temperature monitoring.
Eine erfindungsgemäße Weiterbildung sieht vor, dass das Rohr wenigstens zwei gegeneinander bewegliche Elemente aufweist. Der Vorteil dieser wenigstens zwei gegeneinander beweglichen Teile liegt darin, dass der Rohrquerschnitt damit zuverlässig verschlossen werden kann, so dass unerwünschte Rückströmungen verhindert werden können. A further development according to the invention provides that the tube has at least two mutually movable elements. The advantage of this at least two mutually movable parts is that the pipe cross-section can thus be reliably closed, so that unwanted backflow can be prevented.
Eine weitere erfindungsgemäße Weiterbildung sieht vor, dass der volumenveränderbare Schwellkörper insbesondere schäumbare Elemente aufweist. Der Vorteil schäumbarer Elemente liegt darin, dass sie zuverlässig und schnell einen Rohrquerschnitt vor heißen Rückströmungen schützen können. In einer alternativen Ausgestaltung enthalten die schäumbaren Elemente Wasser, das im Fall des Aufschäumens zur Kühlung und zum Schutz des Rohres freigesetzt wird. A further development according to the invention provides that the volume-variable cavernous body in particular comprises foamable elements. The advantage of foamable elements is that they can reliably and quickly protect a pipe cross section from hot backflow. In an alternative embodiment, the foamable elements contain water, which is released in the case of foaming for cooling and protection of the tube.
In einer anderen erfindungsgemäßen Weiterbildung ist vorgesehen, dass der volumenveränderbare Schwellkörper (3) und/oder der Temperatursensor (10) mit dem Ansaugsystem und/oder der Steuerelektronik (12) der Brennkraftmaschine kommuniziert. Hierbei ist von Vorteil, dass durch die Kommunikation des Sensors mit der Fahrzeugelektronik z. B. in den Bordcomputer bzw. den Fehlerspeicher des Fahrzeugs bzw. der entsprechenden Vorrichtung mit Brennkraftmaschine eine Fehlermeldung eingetragen werden kann, wenn z. B. eine gewisse Temperatur überschritten wurde, was dann Rückschlüsse auf eine Rückströmung zulässt und eine Wartungsempfehlung ausgeben kann. In another development according to the invention, it is provided that the volume-variable cavernous body (3) and / or the temperature sensor (10) communicate with the intake system and / or the control electronics (12) of the internal combustion engine. It is advantageous that by the communication of the sensor with the vehicle electronics z. B. in the on-board computer or the fault memory of the vehicle or the corresponding device with internal combustion engine an error message can be entered if z. B. a certain temperature has been exceeded, which then allows conclusions about a backflow and can issue a maintenance recommendation.
Erfindungsgemäß ist vorgesehen, dass das Rohr einen Anschluss aufweist und die Volumenänderung des Schwellkörpers mittels Gas und/oder Flüssigkeit erfolgt, die über den Anschluss ein- bzw. ausströmt. Der Vorteil liegt in der Möglichkeit, Medien zur Querschnittsveränderung zu verwenden, die aus der Motorumgebung stammen. According to the invention, it is provided that the tube has a connection and the change in volume of the cavernous body takes place by means of gas and / or liquid, which flows in or out via the connection. The advantage lies the ability to use media for cross-section change originating from the engine environment.
Eine weitere erfindungsgemäße Weiterbildung sieht vor, dass die Volumenänderung des oder der Schwellkörper temperaturabhängig erfolgt. Vorteilhafterweise lässt sich so die Vorrichtung vor Überhitzung und Schädigung schützen. A further development according to the invention provides that the volume change of the swelling body or temperature is temperature-dependent. Advantageously, the device can thus be protected against overheating and damage.
Weiter ist erfindungsgemäß vorgesehen, dass das Element im Rohr eine luft- und/oder flüssigkeitsundurchlässige und/oder temperaturbeständige und/oder aufschäumbare Schicht aufweist. Eine derartige Schicht kann vorteilhafterweise aus einem intumeszierten Stoff bestehen. Solche Stoffe werden auch als Dämmschichtbildner bezeichnet. Beim Aufschäumen bilden diese eine Isolierschicht als Hitzebremse und setzen bei Wärmeeinwirkung Gase frei, es entsteht eine geschäumte Ascheschicht, die z. B. die Ausbreitung schädlicher RückStrömungen durch vollständiges Versiegeln des Querschnitts verhindert. Während der Intumeszenz wird Wasser freigesetzt, das kühlend wirkt. Eine Schicht kann beispielsweise 1 mm dick sein, die dann im Intumeszenz-Fall auf etwa 50 mm aufschäumt. Further, the invention provides that the element in the tube has an air and / or liquid impermeable and / or temperature resistant and / or foamable layer. Such a layer may advantageously consist of an intumescent substance. Such substances are also referred to as intumescent agents. When foaming, these form an insulating layer as a heat brake and release gases when exposed to heat, resulting in a foamed ash layer, the z. B. prevents the spread of harmful backflows by completely sealing the cross section. During the intumescence water is released, which has a cooling effect. A layer can be, for example, 1 mm thick, which then foams to about 50 mm in the case of intumescence.
Erfindungsgemäß ist vorgesehen ein Verfahren zum Schutz von Rohren vor schädlichen Rückströmungen, wobei eine Vorrichtung nach den Ansprüchen 1 bis 1 1 zum Einsatz kommt. According to the invention there is provided a method for protecting pipes against harmful backflow, wherein a device according to claims 1 to 1 1 is used.
Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird. Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im Folgenden näher erläutert. Die Zeichnungen zeigen: These and other features of preferred embodiments of the invention will become apparent from the claims and from the description and drawings, wherein the individual features are realized individually or in each case in the form of sub-combinations in the embodiment of the invention and in other fields and can represent advantageous and protectable versions for which protection is claimed here. Embodiments of the invention are illustrated in the drawings and are explained in more detail below. The drawings show:
Figur 1 das Einbauprinzip vor der Auslösung. Die Pfeile zeigen die reguläre Strömungsrichtung ("kaltes Gas"). Figure 1 shows the principle of installation before tripping. The arrows show the regular flow direction ("cold gas").
Figur 2 die Auslösesituation ("heißes Gas" in Gegenrichtung)  FIG. 2 the triggering situation ("hot gas" in the opposite direction)
Figur 3 die Auslösung der Schwellkörper  Figure 3, the triggering of erectile tissue
Figur 4 die Endsituation, die verschlossene Leitung  Figure 4, the final situation, the closed line
Figur 5 einen Schnitt durch ein Rohr  Figure 5 shows a section through a pipe
Figur 6 eine schematische Darstellung eines eingebauten Rohres  Figure 6 is a schematic representation of a built-pipe
In Figur 1 wird das Einbauprinzip des Schwellkörpers 1 vor der Auslösung im Innenrohr 2 dargestellt. Die Pfeile zeigen die reguläre Strömungsrichtung des kaltes Gases 3 an. In Figure 1, the principle of incorporation of Schwellkörpers 1 is shown prior to triggering in the inner tube 2. The arrows indicate the regular flow direction of the cold gas 3.
Figur 2 zeigt die Auslösesituation des Schwellkörpers 1 , wenn heißes Gas 4 in Gegenrichtung durch das Rohr 2 strömt. FIG. 2 shows the triggering situation of the swelling body 1 when hot gas 4 flows in the opposite direction through the pipe 2.
In Figur 3 wird die Auslösung des bzw. der Schwellkörper 5 durch den Heißgasstrom 4 offenbart. Ein Rückströmen von Heißgas soll wirksam durch den Verschluss des Innenrohrs 2 mittels Schwellkörper 1 , 5 verhindert werden. In FIG. 3, the triggering of the swelling body 5 by the hot gas flow 4 is disclosed. A backflow of hot gas should be effectively prevented by the closure of the inner tube 2 by means of cavernous bodies 1, 5.
Figur 4 stellt die Endsituation der mittels Schwellkörper 6 verschlossenen Leitung 2 dar, so dass das Heißgas 4 an einer Rückströmung durch Innenrohr 2 gehindert wird. Der Schwellkörper 6 hat seine endgültige Form über die Stadien Schwellkörper 1 aus Figur 1 und Schwellkörper 5 aus Figur 3 erreicht. FIG. 4 illustrates the final situation of the conduit 2 closed by swelling bodies 6, so that the hot gas 4 is prevented from flowing back through the inner tube 2. The cavernous body 6 has reached its final shape via the stages of erectile tissue 1 of FIG. 1 and cavernous body 5 of FIG.
In Figur 5 wird die rohrförmige Einlage 1 aus z. B. schäumbarem Schwellkörpermaterial im Innenrohr 2 dargestellt. Die Einwirkung von hohen Temperaturen auf den Schwellkörper 1 , 5, 6 im Innenrohr 2 zeigen die Figuren 1 bis 4 im zeitlichen Verlauf. Nach einem Aufschäumen bleibt das Innenrohr 2 bis zum nächsten Werkstattbesuch verschlossen, um Beschädigungen am Kompressor 9, der in Figur 6 zu sehen ist, zu vermeiden. Weiter ist am Ende des Innenrohres 2 ein Lochblech 16 angeordnet, das verhindern soll, dass Schaumpartikel in die Rohrleitung zwischen Brenner 7 und Kompressor 9 gelangen können. Die Anordnung von Rohr 2 im Luftversorgungssystem eines Brennersystems zur Abgasnachbehandlung zeigt Figur 6. In Figure 5, the tubular insert 1 is made of z. B. foamable Schwellkörpermaterial shown in the inner tube 2. The effect of high temperatures on the cavernous body 1, 5, 6 in the inner tube 2, the figures 1 to 4 over time. After foaming, the inner tube 2 remains closed until the next workshop visit in order to avoid damage to the compressor 9, which can be seen in FIG. Next is arranged at the end of the inner tube 2, a perforated plate 16, which is to prevent foam particles can get into the pipe between the burner 7 and compressor 9. The arrangement of tube 2 in the air supply system of a burner system for exhaust aftertreatment is shown in FIG. 6.
Figur 6 offenbart ein Innenrohr 2 als Teil eines Rohres 14 als Hauptluftleitung eines Brennersystems zur Regeneration eines DPF 8, mit einem nicht dargestellten Schwellkörper 1 , 5, 6, wie er beispielsweise in den Figuren 1 bis 5 dargestellt wird, in einem System zwischen Brennkraftmaschine 13 und Dieselpartikelfilter 8 (DPF). FIG. 6 discloses an inner tube 2 as part of a tube 14 as a main air line of a burner system for regeneration of a DPF 8 with a swelling body 1, 5, 6, as shown for example in FIGS. 1 to 5, in a system between internal combustion engine 13 and diesel particulate filter 8 (DPF).
Das Rohr 14 ist angeordnet zwischen Brenner 7 und Kompressor 9 und weist unmittelbar vor dem Brenner 7 einen Temperatursensor 10 auf. Der Brenner 7 mündet in den Abgastrakt 1 1 , der zwischen Brennkraftmaschine 13 und Dieselpartikelfilter 8 angeordnet ist. Die Steuerelektronik 12 kommuniziert mit dem Temperatursensor 10 und dem Anschluss 15. In einer alternativen Ausgestaltung ist vorgesehen, dass mittels Anschluss 15 die aus den Figuren 1 bis 5 dargestellten Schwellkörper mit gasförmigen oder flüssigen Medien aufgrund eines vom Temperatursensor 10 induzierten Steuersignals über die Steuerelektronik 12 befüllt werden. The tube 14 is arranged between the burner 7 and the compressor 9 and has a temperature sensor 10 directly in front of the burner 7. The burner 7 opens into the exhaust tract 1 1, which is arranged between the engine 13 and diesel particulate filter 8. The control electronics 12 communicates with the temperature sensor 10 and the terminal 15. In an alternative embodiment, it is provided that the swelling body shown in FIGS. 1 to 5 is filled with gaseous or liquid media via the control electronics 12 by means of a control signal induced by the temperature sensor 10 become.
Bezugszeichen reference numeral
1 Schwellkörper 1 erectile tissue
2 Innenrohr  2 inner tube
3 kalter Gasstrom  3 cold gas stream
4 heißer Gasstrom  4 hot gas stream
5 aufschäumendes / volumenveränderndes Material während des Auslösens  5 foaming / volume-changing material during triggering
6 aufschäumendes / volumenveränderndes Material im Endzustand 6 foaming / volume-changing material in the final state
7 Brenner 7 burners
8 DPF  8 DPF
9 Kompressor  9 compressor
10 Temperatursensor  10 temperature sensor
11 Abgastrakt  11 exhaust tract
12 Steuerelektronik  12 control electronics
13 Brennkraftmaschine  13 internal combustion engine
14 Rohr als Hauptluftleitung eines Brennersystems zur Regeneration eines DPF  14 Pipe as the main air line of a burner system for the regeneration of a DPF
15 Anschluss  15 connection

Claims

Rohr A N S P R Ü C H E Pipe INSTRUCTIONS
1. Rohr, insbesondere im Luftversorgungssystem eines Brennersystems von insbesondere mit Ansaugsystem und/oder Steuerelektronik versehenen Brennkraftmaschinen, wobei das Innenrohr und/oder die Innenrohroberfläche (1 ) wenigstens ein den Innenrohrdurchmesser (2) bzw. die Innenrohrquerschnittsfläche veränderndes Element (1 , 5, 6) aufweist. 1. Pipe, in particular in the air supply system of a burner system of particular with intake system and / or control electronics provided internal combustion engine, wherein the inner tube and / or the inner tube surface (1) at least one inner tube diameter (2) or the Innenrohrquerschnittsfläche changing element (1, 5, 6 ) having.
2. Rohr nach Anspruch 1 , 2. Pipe according to claim 1,
dadurch gekennzeichnet, dass die Innenrohroberfläche wenigstens einen volumenveränderbaren Schwellkörper (1 , 5, 6) aufweist. characterized in that the inner tube surface has at least one volume-variable cavernous body (1, 5, 6).
3. Rohr nach einem oder mehreren der vorgenannten Ansprüche, dadurch gekennzeichnet, dass es wenigstens einen Temperatursensor (10) aufweist. 3. Pipe according to one or more of the preceding claims, characterized in that it comprises at least one temperature sensor (10).
4. Rohr nach einem oder mehreren der vorgenannten Ansprüche, 4. Pipe according to one or more of the preceding claims,
dadurch gekennzeichnet, dass das Rohr (1 , 5) wenigstens zwei gegeneinander bewegliche Elemente aufweist. characterized in that the tube (1, 5) has at least two mutually movable elements.
5. Rohr nach einem oder mehreren der vorgenannten Ansprüche, dadurch gekennzeichnet, dass der volumenveränderbare Schwellkörper (1 ,5. Pipe according to one or more of the preceding claims, characterized in that the volume-variable cavernous body (1,
5, 6) insbesondere schäumbare Elemente aufweist. 5, 6) in particular has foamable elements.
6. Rohr nach einem oder mehreren der vorgenannten Ansprüche, 6. Pipe according to one or more of the preceding claims,
dadurch gekennzeichnet, dass der volumenveränderbare Schwellkörper (1 , 5, 6) und/oder der Temperatursensor (10) mit dem Ansaugsystem und/oder der Steuerelektronik (12) der Brennkraftmaschine kommuniziert. characterized in that the volume changeable cavernous body (1, 5, 6) and / or the temperature sensor (10) communicates with the intake system and / or the control electronics (12) of the internal combustion engine.
7. Rohr nach einem oder mehreren der vorgenannten Ansprüche, dadurch gekennzeichnet, dass die Volumenänderung des oder der Schwellkörper (1 , 5, 6) temperaturabhängig erfolgt. 7. Tube according to one or more of the preceding claims, characterized in that the volume change of the or the cavernous body (1, 5, 6) is temperature-dependent.
8. Rohr nach einem oder mehreren der vorgenannten Ansprüche, dadurch gekennzeichnet, dass das Rohr als Diffusor ausgebildet ist. 8. Pipe according to one or more of the preceding claims, characterized in that the tube is designed as a diffuser.
9. Rohr nach einem oder mehreren der vorgenannten Ansprüche, dadurch gekennzeichnet, dass das Element (3) eine luft- und/oder flüssigkeitsundurchlässige und/oder temperaturbeständige und/oder aufschäumbare Schicht (6) aufweist. 9. Pipe according to one or more of the preceding claims, characterized in that the element (3) has an air and / or liquid impermeable and / or temperature resistant and / or foamable layer (6).
10. Verfahren zum Schutz von Rohren vor schädlichen RückStrömungen, dadurch gekennzeichnet, dass eine Vorrichtung nach einem oder mehreren der vorgenannten Ansprüche zum Einsatz kommt. 10. A method for protecting pipes from harmful reflux, characterized in that a device according to one or more of the preceding claims is used.
EP11743782.2A 2010-09-04 2011-08-10 Pipe Withdrawn EP2611999A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010044399A DE102010044399A1 (en) 2010-09-04 2010-09-04 pipe
PCT/EP2011/003990 WO2012028250A1 (en) 2010-09-04 2011-08-10 Pipe

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EP11743782.2A Withdrawn EP2611999A1 (en) 2010-09-04 2011-08-10 Pipe

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EP (1) EP2611999A1 (en)
DE (1) DE102010044399A1 (en)
WO (1) WO2012028250A1 (en)

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US8985155B2 (en) 2015-03-24
DE102010044399A1 (en) 2012-03-08
WO2012028250A1 (en) 2012-03-08
US20130180613A1 (en) 2013-07-18

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