EP0593724B1 - Raccord de buse pour bruleur a pulverisation de fuel sous pression - Google Patents

Raccord de buse pour bruleur a pulverisation de fuel sous pression Download PDF

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Publication number
EP0593724B1
EP0593724B1 EP93909953A EP93909953A EP0593724B1 EP 0593724 B1 EP0593724 B1 EP 0593724B1 EP 93909953 A EP93909953 A EP 93909953A EP 93909953 A EP93909953 A EP 93909953A EP 0593724 B1 EP0593724 B1 EP 0593724B1
Authority
EP
European Patent Office
Prior art keywords
nozzle assembly
preheater
nozzle
fuel
stop valve
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.)
Expired - Lifetime
Application number
EP93909953A
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German (de)
English (en)
Other versions
EP0593724A1 (fr
Inventor
Walter Steeb
Werner DÖHLA
Dietrich Brunner
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.)
Rapa Rausch and Pausch Elektrotechnische Spezialfabrik GmbH
Original Assignee
Rapa Rausch and Pausch Elektrotechnische Spezialfabrik 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6458907&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0593724(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Rapa Rausch and Pausch Elektrotechnische Spezialfabrik GmbH filed Critical Rapa Rausch and Pausch Elektrotechnische Spezialfabrik GmbH
Publication of EP0593724A1 publication Critical patent/EP0593724A1/fr
Application granted granted Critical
Publication of EP0593724B1 publication Critical patent/EP0593724B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/44—Preheating devices; Vaporising devices

Definitions

  • the invention relates to a nozzle assembly according to the preamble of the first claim, which is intended for oil pressure atomizing burners.
  • an instantaneous oil heater for the combustion of light or extra-light heating oil is already known (DE 27 38 377 A1), in which favorable conditions are created between the oil temperature, the oil supply pressure, the nozzle to be selected and the heat generation achieved, and to prevent dripping.
  • the instantaneous oil pressure heater has an axially arranged, preferably electrical heater, a line spiral surrounding the heater and ending in a nozzle chamber, and a shut-off valve arranged in the nozzle chamber, which can be a solenoid valve, in front of which a blocking thermostat is arranged in the oil supply direction.
  • valve for atomizing burners for liquid fuel which is designed as a solenoid valve and whose housing forms the nozzle holder, in which the nozzle is screwed into an extension of the oil outlet channel with a filter facing the solenoid valve.
  • An oil preheater is not provided in this case.
  • the electrical connections are on the outside of the nozzle holder, near the nozzle; there they are arranged very close to the burner flame and exposed to the heat and interfere with the installation of the nozzle assembly in a given heating system.
  • the housing of the solenoid valve has a larger diameter than the nozzle holder, as a result of which the fan air flow is adversely affected.
  • an oil delivery device for an oil atomizing burner in which a nozzle assembly containing a preheater is connected to the flow of a pump via a solenoid valve.
  • a shut-off valve in the nozzle assembly between the preheater and the nozzle, with which a second shut-off valve, which is assigned to the solenoid valve, interacts to prevent spraying and dripping.
  • the effort required for this which is expressed in the arrangement of two additional shut-off valves and a bypass, is very high.
  • the object of the invention is now to combine the advantages of the known devices without accepting their disadvantages.
  • the invention is intended to provide a nozzle assembly which enables the required viscosity of the fuel oil to be carried out with little effort and effectively and which prevents the oil from dripping in and out from the burner nozzle, but at the same time is compact and compatible designed so that it can be used in both new and modernized pressure atomizing burners.
  • this object is achieved by the features mentioned in the characterizing part of the first claim.
  • the combination of features makes it possible to give the nozzle assembly a shape that does not deviate from the previous one and therefore does not require any external electrical feeds and connections in the vicinity of the nozzle which impair the functional safety, nor does it have a negative influence on the fan air flow, nor in general desired, self-contained structure of the nozzle assembly does.
  • the electrical connections from the electrical connection to the shut-off valve can be made within the clear pipe diameter or in the pipe wall within the outer pipe diameter, for example in longitudinal grooves parallel to the geometric axis of the pipe. In any case, there is the advantage that the external dimensions and designs of the tube are not changed.
  • the electrical connection itself can be arranged in at least one housing laterally at the end of the tube on the fuel tube side.
  • a common protective conductor and a common neutral conductor connection can be provided for the preheater and the magnetic coil.
  • a two-stage heating of the nozzle assembly can be achieved in that the solenoid of the shut-off valve is used to heat the nozzle assembly or the nozzle when the burner is operated.
  • the preheater is arranged to be removable from the tube.
  • the shut-off valve is a solenoid valve, the solenoid coil of which has a safety extra-low voltage is operated. This enables turns of the solenoid coil with thicker wires and increases the safety of the function.
  • the pipe is advantageously designed in several pieces, electrical plug connections being able to exist between the individual pipe pieces if necessary.
  • at least the pipe piece surrounding the shut-off valve can consist of a ferromagnetic material, whereby the magnetic flux of the shut-off valve is promoted and its operation is simplified.
  • the preheater can also heat the nozzle, at least one heat-conducting element is provided between it and the nozzle, which is preferably designed as a copper sleeve and surrounds the shut-off valve. So that this copper sleeve does not influence the magnetic flux through the copper wall, it is slotted at its ends.
  • rods or strips can also be provided, which end at the preheater and at the nozzle or in the vicinity thereof.
  • the heat-conducting elements are located near the pipe wall, in the vicinity of the shut-off valve.
  • the pipe be provided with at least one closable opening in its wall, in order to be able to assemble or disassemble individual parts, eg the preheater or the shut-off valve, more easily if necessary than when the pipe is closed.
  • the tube and the fuel supply tube are advantageously connected to one another with the aid of a union nut and a corresponding thread, which can be designed as an internal or external thread on the connecting piece of the tube.
  • the nozzle with the tube can be attached to the connecting piece of the tube or the nozzle itself via a corresponding internal or external thread.
  • the filter is preferably provided at the end of the tube which faces the fuel supply tube. However, it can also be located in front of the nozzle-side end of the tube, that is, directly upstream of the nozzle. In any case, adequate space must be available to attach the nozzle.
  • the central, coaxial fuel guide in the nozzle assembly in the preheater area consists of several axially parallel channels or of a channel filled with heat-conducting bodies that form spaces, which are preferably surrounded by the preheater.
  • Heating coils or rods or PTC thermistors can serve as heating elements of the preheater.
  • a cylindrical tube 1 of a nozzle assembly 22 consisting of a ferromagnetic material has essentially the same diameter d over its entire length and has a coaxial fuel guide 2, the diameter of which alternates over the length of the tube 1. It is connected on the one hand to a fuel supply pipe 3 and on the other hand to a nozzle 4. In the vicinity of the Brerinstoffzu Equipmentsrohres 3 it is provided with a housing 5 for electrical connections and in the vicinity of the nozzle 4 with a function-related recess 6 in the form of a key surface. To attach the tube 1 to the fuel tube 3 is a
  • the connector 8 has a widening 11, into which the intermediate piece 9 projects with an internal threaded piece 12, which in turn meshes with a corresponding internal thread 13 on a support piece 14 with key surfaces 56 for a filter 15, which is firmly connected to the support piece 14.
  • the intermediate piece 9 has a shoulder 16 against which the front surface of the connector 8 is pressed when the union nut 10 is tightened.
  • the intermediate piece 9 is provided with a collar 17 and a cylindrical surface 18, along which the tube 1 is rotatably connected to the intermediate piece 9, so that its corresponding front surface comes into contact with the surface of the collar 17 facing it.
  • a cylindrical preheater 19 with channels 20 is arranged parallel to the axis XX, which is pushed with its end facing the intermediate piece 9 over a fit 21 on the intermediate piece 9, a seal 23 being incorporated into the fit.
  • the preheater 19 is fitted with an outer collar 24 in the tube 1, which has at least one recess 25.
  • the preheater 19 is surrounded in the region of the channels 20 by a heater 26, for example one or more heating spirals, which serve to heat the preheater 19.
  • the preheater 19 ends on the nozzle side with a cylindrical fitting surface 27, into which a seal 28 is incorporated, in a stepped ring 29 and is supported against the latter.
  • a flow piece 30 is designed and arranged such that one end projects into the stepped ring 29 and one shoulder 31 is supported against one of the steps of the step ring 29 and is also surrounded by a guide tube 32 which, in the direction of flow indicated by an arrow 33 following the flow piece 30, contains an annular armature 34, the fuel guide 2 of which has a larger cross section than that of the flow piece 30 and which contains a coil spring 35, which is supported against the nozzle-side front surface of the flow piece 30 with one end.
  • the other end of the coil spring 35 presses on a closure piece 37 provided with lateral flow recesses 36, which is located in an extension 38 of the fuel guide 2 in the armature 34 and bears against a flange ring 39 of the armature 34.
  • the guide tube 32 has at its nozzle-side end a recess 40 with an opening 41 which is opened by the closure piece 37 or sealed.
  • the tube 1 has in the interior near its nozzle-side end a collar 42 which holds the guide tube 32 radially, a seal 43 being provided between the collar 42 and the guide tube 32; to the collar 42, a space 44 adjoins the nozzle 4 in a connecting piece 55 with internal threads 45, into which the nozzle 4 can be screwed with its external thread.
  • the guide tube 32 is surrounded by a housing containing a solenoid 46, which together with the armature 34, the spring 35, the closure piece 37 and the opening 41 belong to a solenoid valve.
  • a copper sleeve 48 is provided between the magnet coil housing 47 and the wall of the tube 1.
  • the solenoid 46 of the solenoid valve After reaching a predetermined temperature and after a pre-aeration time, voltage is applied to the solenoid 46 of the solenoid valve, the armature 34 is pulled against the flow piece 30 and the opening 41 is opened so that the heated fuel through the fuel guide 2 including the channels 20 and lateral flow recesses 36 can reach the nozzle 4.
  • the means for regulating the voltage application are not shown and are known per se.
  • the solenoid valve can simultaneously serve to heat the nozzle end of the nozzle assembly 22, so that the heating power of the preheater 19 can be reduced.
  • the pipe 1 is at least close of the solenoid valve, which comprises the parts 34, 35, 37, 41, 46, 47, made of magnetizable material, it is included in the magnetic flux, so that this is largely unhindered by the armature 34, the collar 42, the tube 41, the Step ring 29, the flow piece 30 can flow back to the armature 34. If the oil pressure atomizing burner, to which the nozzle assembly 22 belongs, is shut off, the closure piece 37 closes the opening 41 again and no fuel can get into the space 44 and thus into the nozzle 4 from the fuel guide 2 inside the tube 1.
  • the filter 15 could be arranged directly upstream of the preheater 19 of the nozzle 4.
  • the preheater 19 can be removed from the tube 1.
  • the preheater 19 can use PTC thermistors instead of the coils as heating elements 26;
  • a single channel filled with good heat-conducting bodies (balls) can be provided, with spaces between the points of contact of the bodies.
  • all or part of the electrical lines 50 to 54 can be led through grooves.
  • connections of the nozzle assembly 22 to the fuel pipe 3 and to the nozzle 4 can also be designed such that an external thread is provided on the connector 8 instead of the internal thread 7.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)

Abstract

Ce raccord de buse (22) pour brûleur à pulvérisation de fuel sous pression se caractérise par sa construction compacte, compatible et fiable. Il comprend un tuyau cylindrique (1) présentant pratiquement le même diamètre (d) sur toute sa longueur. Les éléments de raccordement électriques (52, 53) allant jusqu'à la soupape d'arrêt (34, 35, 37, 41, 46, 47) sont guidés à l'intérieur du diamètre extérieur du tuyau.

Claims (20)

  1. Raccord de buse pour brûleur à pulvérisation de fuel sous pression, présentant, d'une part, une pièce de raccordement pour la connexion avec un tuyau d'ali-mentation de combustible, et présentant, d'autre part, une pièce de raccordement pour une tuyère; en outre, le raccord de buse présente des moyens de conduite du combustible vers la tuyère situés entre les deux pièces de raccordement, un préchauffeur électrique étant affecté aux moyens de conduite du combustible; entre le préchauffeur et la pièce de raccordement de la tuyère est prévue une soupape d'isolement électromagnétique; en outre, il existe des branchements électriques correspondants pour le préchauffeur et la soupape d'isolement électromagnétique; le raccord de buse est caractérisé par le fait que les branchements électriques (49) sont prévus à proximité de la pièce de raccordement (8) menant au tuyau d'alimentation de combustible (3), et caractérisé par le fait que des connexions électriques (52, 53) allant des branchements électriques (49) jusqu'à la bobine magnétique (46) de la soupape d'isolement (30, 32, 34, 35, 37, 41, 46, 47) sont disposées à l'intérieur du diamètre (d) du raccord de bu se (22) et à l'extérieur de la conduite de combustible (2).
  2. Raccord de buse conforme à la spécification 1, caractérisé par le fait que la conduite (2) du combustible est disposée de façon coaxiale sur toute la longueur du tuyau (1).
  3. Raccord de buse conforme à la spécification 2, caractérisé par le fait que, du cô-té de la pièce de raccordement (8) menant au tuyau d'alimentation de combustible (3), le préchauffeur électrique (19) est disposé de façon essentiellement coaxiale autour de la conduite de combustible (2).
  4. Raccord de buse selon la spécification 1, caractérisé par le fait que les branchements électriques (49) sont disposés à l'extérieur du tuyau (1).
  5. Raccord de buse selon les spécifications 2 et 4, caractérisé par le fait que la connexion électrique (52, 53) allant des branchements (49) jusqu'à la bobine magnétique (46) de la soupape d'isolement (30, 32, 34, 35, 37, 41, 46, 47) est menée dans le diamètre intérieur du tuyau.
  6. Raccord de buse selon les spécifications 1 et 5, caractérisé par le fait que le tuyau (1) est muni de cannelures longitudinales pour les connexions électriques (50, 51, 52, 53).
  7. Raccord de buse selon au moins une des spécifications ci-dessus mentionnées, caractérisé par le fait que les branchements électriques (49) sont fixés de façon latérale au tuyau (1) dans au moins un boîtier (5).
  8. Raccord de buse selon la spécification 7, caractérisé par le fait qu'il est prévu un branchement commun de conducteur de protection (54) pour le préchauffeur (19) et la soupape d'isolement (30, 32, 34, 35, 37, 41, 46, 47).
  9. Raccord de buse selon les spécifications 7 et 8, caractérisé par le fait qu'il existe un branchement commun de conducteur neutre pour le préchauffeur (19) et la bobine magnétique (46) de la soupape d'isolement (30, 32, 34, 35, 37, 41, 46, 47).
  10. Raccord de buse selon la spécification 1, caractérisé par le fait que la bobine magnétique (46) de la soupape d'isolement (30, 32, 34, 35, 37, 41, 46, 47) sert à chauffer le combustible lors de l'opération de combustion.
  11. Raccord de buse selon une des spécifications ci-dessus mentionnées, caractérisé par le fait que le préchauffeur (19) est disposé de façon à pouvoir être dé-taché.
  12. Raccord de buse selon la spécification 5, caractérisé par le fait que la soupape d'isolement (30, 32, 34, 35, 37, 41, 46, 47) est une soupape magnétique prévue pour une tension réduite de sécurité.
  13. Raccord de buse selon au moins une des spécifications ci-dessus mentionnées, caractérisé par le fait que le tuyau (1) est formé par plusieurs pièces.
  14. Raccord de buse selon les spécifications 1 et/ou 13, caractérisé par le fait que le tuyau (1) est constitué d'un matériau ferromagnétique au moins à proximité de la soupape d'isolement (30, 32, 34, 35, 37, 41, 46, 47).
  15. Raccord de buse selon au moins une des spécifications ci-dessus mentionnées, caractérisé par le fait que, pour la soupape d'isolement (30, 32, 34, 35, 37, 41, 46, 47), sont prévus essentiellement des éléments thermoconducteurs environnants (48) se terminant d'une part au moins à proximité du préchauffeur (19) et d'autre part au moins à proximité de la tuyère (4).
  16. Raccord de buse selon au moins une des spécifications ci-dessus mentionnées, caractérisé par le fait qu'il présente un filtre (15) du côté du tuyau d'alimentation de combustible (3) dans la conduite de combustible (2), filtre muni d'une pièce porteuse (14) avec laquelle il est échangeable.
  17. Raccord de buse selon la spécification 16, caractérisé par le fait que la pièce porteuse (14) du filtre (15) est munie d'au moins deux surfaces clé (56).
  18. Raccord de buse selon au moins une des spécifications ci-dessus mentionnées, caractérisé par le fait que la conduite de combustible (2) est constituée, dans la zone du préchauffeur (19), par plusieurs canaux paraxiaux (20).
  19. Raccord de buse selon au moins une des spécifications ci-dessus mentionnées, caractérisé par le fait que la conduite de combustible (2) n'est composée, dans la zone du préchauffeur (19), que d'un seul canal rempli de corps conduisant bien la chaleur et formant des intervalles.
  20. Raccord de buse selon au moins une des spécifications ci-dessus mentionnées, caractérisé par le fait que le préchauffeur (19) présente un ou plusieurs posistors.
EP93909953A 1992-05-12 1993-05-11 Raccord de buse pour bruleur a pulverisation de fuel sous pression Expired - Lifetime EP0593724B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4215995A DE4215995C5 (de) 1992-05-12 1992-05-12 Düsenstock für Öldruckzerstäubungsbrenner
DE4215995 1992-05-12
PCT/EP1993/001163 WO1993023705A1 (fr) 1992-05-12 1993-05-11 Raccord de buse pour bruleur a pulverisation de fuel sous pression

Publications (2)

Publication Number Publication Date
EP0593724A1 EP0593724A1 (fr) 1994-04-27
EP0593724B1 true EP0593724B1 (fr) 1996-07-24

Family

ID=6458907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93909953A Expired - Lifetime EP0593724B1 (fr) 1992-05-12 1993-05-11 Raccord de buse pour bruleur a pulverisation de fuel sous pression

Country Status (5)

Country Link
US (1) US5460330A (fr)
EP (1) EP0593724B1 (fr)
CA (1) CA2113166A1 (fr)
DE (1) DE4215995C5 (fr)
WO (1) WO1993023705A1 (fr)

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DE19746556A1 (de) * 1997-10-22 1999-05-06 Hotset Heizpatronen Zubehoer Rohrförmiges elektrisches Heizelement zur Beheizung eines Düsenkörpers
DE59904837D1 (de) * 1998-12-28 2003-05-08 Suntec Ind France S A Longvic Vorwärmer für einen Öldruckzerstäubungsbrenner
WO2007076962A1 (fr) * 2006-01-02 2007-07-12 Ryll-Tech Gmbh Bruleur de chauffage
ATE446478T1 (de) * 2006-02-22 2009-11-15 Tempratec Ltd Vorrichtung und verfahren zum verbrennen eines brennstoffes
WO2007096788A1 (fr) * 2006-02-22 2007-08-30 Tempratec Ltd. Dispositif et procédé de combustion d'un carburant
CN101013120B (zh) * 2007-01-30 2010-06-02 中山大学 一种自动化滴定分析的方法及其应用
GB2516868B (en) * 2013-08-02 2017-01-18 Kiln Flame Systems Ltd Swirl Burner for Burning Solid Fuel and Method of using same
US20150308714A1 (en) * 2014-04-26 2015-10-29 Itzhak M. Itzhaky Method and Apparatus for Controlling and Regulating Flow of Fuel Oil in Heating Systems
US9683511B2 (en) 2015-05-14 2017-06-20 Ford Global Technologies, Llc Method and system for supplying fuel to an engine
US9689341B2 (en) 2015-06-08 2017-06-27 Ford Global Technologies, Llc Method and system for fuel system control

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Also Published As

Publication number Publication date
CA2113166A1 (fr) 1993-11-25
WO1993023705A1 (fr) 1993-11-25
DE4215995C5 (de) 2008-02-21
EP0593724A1 (fr) 1994-04-27
DE4215995A1 (de) 1993-11-18
US5460330A (en) 1995-10-24
DE4215995C2 (de) 1998-03-19

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