EP0930464A2 - Verfahren und Vorrichtung für das abgedichtete Befestigen einer Brennerelektrode - Google Patents
Verfahren und Vorrichtung für das abgedichtete Befestigen einer Brennerelektrode Download PDFInfo
- Publication number
- EP0930464A2 EP0930464A2 EP98121428A EP98121428A EP0930464A2 EP 0930464 A2 EP0930464 A2 EP 0930464A2 EP 98121428 A EP98121428 A EP 98121428A EP 98121428 A EP98121428 A EP 98121428A EP 0930464 A2 EP0930464 A2 EP 0930464A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- edge
- sealing ring
- hole
- electrode
- burner
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
- F23Q3/006—Details
Definitions
- the present invention relates to a method for fastening an electrode to a Wall plate of a burner, the wall plate having a bore in which the ceramic insulating body of an electrode is arranged, whereupon by a pressing process the metal material of the wall plate surrounding the ceramic body of the electrode in the direction the center of the bore is plastically deformed so that the ceramic body through the Hole edge of the wall plate is held.
- the present invention also relates to a burner electrode with a ceramic insulating body of the electrode in a hole-receiving wall plate.
- burners have long been known. This can be the electrode in a Bore-receiving wall plate either separately into an opening in a burner wall insertable holding plate, but theoretically can also simply the boiler wall in question or an end plate of a burner insert has a corresponding bore, in which the ceramic insulating body of the electrode is picked up and fixed.
- wall plate used here includes the term "holding plate” and the The use of this term is largely synonymous here, even if as a rule separate, small holding plates are meant, which are mounted on the electrades and which in the assembled state of the burner form part of the wall of this burner, so that insofar as the term "wall plate” is applicable.
- a holding plate to be used on a burner wall is in connection with the electrode and its It is easier to handle and therefore preferred.
- the holding plate can be fixed relatively easily in the designated opening of the wall plate, e.g. B. by screwing.
- the connection between the holding plate and the electrode is against it comparatively complex, since the electrode is live during operation or, in In the case of a monitoring electrode, very low currents must be transported so that the through the electrode passed through the holding plate is insulated very well from the holding plate itself have to be.
- Electrode This is generally done through the ceramic insulator that surrounds the electrode, the unit consisting of ceramic insulating body and the central metallic electrode element is also referred to collectively as the "electrode”.
- connection between the ceramic insulating body of the electrode and the holding plate can be made mechanically relatively safe by the usual pressing process, but is this connection is generally not gas-tight.
- this connection is generally not gas-tight.
- the object of the present invention is a method for fastening burner electrodes in holding plates or a corresponding, to provide a burner electrode provided with a holding plate, which provides a gas-tight connection Provide between the holding plate and the burner electrode.
- this object is achieved in that before the pressing process of Holding plates or wall plates an elastically or plastically deformable sealing ring between the perforated edge of the wall plate (or retaining plate) and the ceramic body of the Electrode is arranged.
- the one on which the invention is based Object achieved in that between the edge of the receiving ceramic body Bore of the holding plate and the ceramic body an elastic and / or plastic Sealing ring is arranged.
- the method for producing such a connection is expediently so designed that holding and positioning devices are provided, through which the provided between the edge of the hole and the ceramic body during the pressing of the Retaining plate remains in its intended position.
- the sealing ring can also itself be designed in a corresponding manner that he before connecting the holding plate and Ceramic body either on the ceramic body or on the holding plate or the edge of the hole of the holding plate adheres firmly. Examples of this will be described later.
- a Possibility of positioning or precise arrangement of the sealing ring lies in the ceramic body at the level of the mounting position of the retaining plate, a circumferential groove to provide in which a sealing ring is at least partially received. The Sealing ring can then not in the longitudinal direction on the generally cylindrical Slip ceramic body.
- the sealing ring could also be on the edge of the hole provided in the holding plate be attached, e.g. B. if a circumferential in the opening edge of the retaining plate Depression is provided, or if the sealing ring has a U-shaped or L-shaped cross section has one or two radially outwardly projecting legs, which makes the sealing ring can be anchored to the opening edge of the retaining plate.
- an im Cross section of flat rectangular sealing ring also with a tight fit on the cylindrical Ceramic body would be pushed on and would fit due to the tight fit flat, flat contact surface on the ceramic body also not easily slip.
- the pressing of the Metal of the retaining plate in a ring and essentially without interruption around the edge of the hole circumferentially at a substantially constant distance from the edge of the hole in the hole Holding plate is done.
- the pressing can also be interrupted and in particular simultaneously or successively over certain angle segments of 60 °, 90 ° or 120 ° short, unpressed webs can also be made between adjacent segments remain.
- This pressing is preferably carried out at a distance of between 0.2 mm and 10 mm from the Hole edge of the hole, the width of the press line or a corresponding press tool is preferably between 1 and 5 mm.
- the metal is pressed Retaining plate preferably from both sides of the metal plate and preferably in each case at the same distance from the edge of the hole and also in the same width and the same Cross-sectional shape of the pressing or the pressing tool. That way expediently annular grooves are stamped into the metal sheet on both sides, a part of the metal gripped by the pressing tools flows radially inwards and thus reduces the diameter of the bore receiving the ceramic body with the seal, to ensure a firm engagement between the holding plate, seal and ceramic body to manufacture.
- a variant of the production process is particularly preferred, in which the press grooves with a trapezoidal cross section.
- a variant of the method is particularly preferred, in which the pressing done in such a way that the inner edges of the bore at the top and bottom of the Each sheet is pressed a little more radially inwards than the sheet material in one middle section in between, i.e. between the top and bottom of the sheet.
- This has the effect that a groove or circumferential depression is effectively produced in the edge of the hole in which the seal is held securely.
- the seal in Extends axially beyond the thickness of the retaining plate, these come above Edges of the mounting hole with the seal in a more or less linear shape Touch, which causes a high sealing pressure and thus the tightness of the Connection guaranteed in a special way.
- an embodiment of the invention preferred, in which the sealing ring is arranged such that between the Ceramic body of the electrode and the holding plate there is no direct contact.
- the edge of the hole in the hole in the retaining plate only engages with the seal and the seal itself with this hole edge on one side and on the other side engages with the ceramic body.
- the seal has a corresponding thickness that a direct contact between the bracket and Ceramic body of the electrode prevented, or in that the seal in the axial Direction extends on both sides across the thickness of the retaining plate, so that over the entire thickness of the holding plate the seal between the holding plate and the Ceramic body is arranged.
- Suitable materials for the sealing ring come e.g. B. PTFE, EPTM or silicone in question.
- the sealing ring can also be made of one plastically deformable metal, such as. B. copper or a copper alloy.
- a plastically deformable metal such as. B. copper or a copper alloy.
- Such Metal seals are particularly suitable when the burner is in operation higher on the holding plate and in particular in the area of the burner electrode on the holding plate Temperatures arise at which the aforementioned elastomeric seals may occur would not stand up.
- the seals for the connection according to the invention can have different cross sections to have. Both round, rectangular and x-shaped cross-sectional shapes are possible, without this list being intended to be exhaustive.
- FIG shown box A burner in the form of a rectangular, here open on three sides, can be seen in FIG shown box, which is tightly closed during operation of the burner and only in the An opening for the discharge of exhaust gases is correspondingly not shown here the arrow B shown there.
- Burner rods 21 which are hollow and with their hollow interior with a fuel, specifically a fuel gas and an air supply are connected. This fuel gas and combustion air supply takes place along arrow A, for example by the injector action of the supplied fuel gas, if necessary also with a blower, not shown here.
- an ignition electrode 1 is shown, which is in a holding plate 2 is arranged in the wall 22 of the combustion chamber 20.
- the bracket 2 can with the wall 22 screwed or riveted.
- the ignition electrode itself and its attachment in the The holding plate can be seen better in FIGS. 2 and 3.
- FIG. 2 is an axial section through a first embodiment of a burner electrode shown in the fastening area has a substantially cylindrical ceramic body 3, through which an electrode wire 5 extends centrally.
- the electrode wire 5 is again with a connector 15 connected, and between the connector 15, the electrode wire 5 and the Ceramic body 3, a sealing ring 14 is also provided, which, among other things, the gas-tight Connection between the ceramic body 3 and the electrode wire arranged centrally therein 5 ensures.
- the holding plate 2 also shown in section or the edge of the central bore in the Retaining plate 2 is in engagement with a seal 4 ', which extends in the axial direction over the entire thickness of the holding plate 2 extends.
- the sealing ring used here could e.g. B. have the flat rectangular cross-sectional shape shown in Figure 4 above.
- the sealing ring 4 ' is stronger in the area of the upper and lower edges of the edge of the hole compressed than in the rest of the area. Because of this almost linear intervention a very high specific surface pressure is generated, with a very good seal Connection.
- the ring-shaped ones that have been pressed in around the receiving opening have been pressed in Grooves 7 have a trapezoidal cross-section and their clear distance from the edge of the hole, i.e. the clear distance between the radially innermost upper or lower edge the grooves 7 to the edge of the hole is smaller than the thickness of the holding plate and is only between 20 and 30% of this thickness.
- the exemplary embodiment according to FIG. 3 differs from the exemplary embodiment according to Figure 2 in several ways.
- the ceramic body 3 clearly has one changed shape and is no longer a simple hollow cylinder but a hollow cylinder with a stepped, central bore, and the ceramic body 3 also has one its outer circumferential groove 8.
- the cavity runs essentially in a tight fit of the electrode wire 5.
- a sealing ring 14 arranged, and preferably in a tight fit, so that again a safe Sealing between the electrode wire 5 on the one hand and the inner wall of the hollow cylindrical Ceramic body 3 is generated on the other hand.
- the trapezoidal grooves 7 of the holding plate 2 have essentially the same shape and Arrangement as in the case of the embodiment shown in Figure 2 and also due to Special arrangement of the trapezoidal grooves 7 produced, projecting upper and lower perforated edges 9 have essentially the same course as in the exemplary embodiment of Figure 2.
- FIG. 5 is a section of the Sealing engagement between the holding plate 2 and ceramic body 3 without the sealing ring shown.
- the sealing ring 4 is dimensioned such that it is only partially received in this groove and definitely protrudes so far from this groove that it is in tight engagement with the inner surface the hole in the holding plate 2 occurs when this holding plate is pressed against the ceramic body 3 is.
- the sealing ring 4 could, for. B. that shown in the middle of Figure 4, approximately Have an X-shaped cross-sectional shape, due to the pressure exerted by the holding plate 2 takes an almost square shape.
- the sealing ring initially a more or less linear engagement along the protruding edges of the sealing ring, so that even in the area of these edges there is a relatively large, specific surface pressure.
- Sealing ring 4 '' can be used, as shown in the lower part of Figure 4, because a such a sealing ring with flat surfaces also initially only in more or less linear engagement occurs and in general also with such sealing rings Make connections.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
- Gasket Seals (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
Description
- Figur 1
- schematisch einen offen dargestellten Brennerraum mit darin angeordneten Brennstäben und einer in einem Halteblech aufgenommenen Brennerelektrode,
- Figur 2
- eine erste Ausführungsform einer in einem Halteblech befestigten Brennerelektrode,
- Figur 3
- eine zweite Ausführungsform einer in einem Halteblech befestigten Brennerelektrode,
- Figur 4
- unterschiedliche Querschnittsformen für in Frage kommende Dichtungsringe und
- Figur 5
- nochmals einen vergrößerten Ausschnitt der Verbindung zwischen Halteblech und Keramikkörper ohne Dichtungsring.
Claims (20)
- Verfahren zur Befestigung einer Elektrode (1) an einem Wandblech (2) eines Brenners, wobei das Wandblech (2) eine Bohrung (6) aufweist, in welcher der keramische Isolierkörper (3) einer Elektrode (1) angeordnet wird, woraufhin durch einen Preßvorgang das den Keramikkörper (3) der Elektrode (1) umgebende Metallmaterial des Wandbleches (2) in Richtung des Zentrums der Bohrung (6) plastisch verformt wird, so daß der Keramikkörper (3) durch den Lochrand (9) des Wandbleches (2) festgehalten wird, dadurch gekennzeichnet, daß vor dem Preßvorgang ein elastischer und/oder plastisch verformbarer Dichtungsring (4, 4') zwischen dem Lochrand (9) des Wandbleches (2) und dem Keramikkörper (3) der Elektrode (1) angeordnet wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Dichtungsring (4, 4') in einer in dem Befestigungsbereich des Keramikkörpers (3) vorgesehenen, umlaufenden Nut (8) angeordnet wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Pressen des Metalls im wesentlichen ringförmig um den Lochrand (9) und in einem im wesentlichen konstanten Abstand zum Lochrand (9) erfolgt.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß das Pressen im Abstand zwischen 0,2 und 10 mm vom Lochrand (9) der Bohrung (6) erfolgt.
- Verfahren nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß das Pressen des Metalls in einer, gemessen in radialer Richtung vom Zentrum des Loches, Breite zwischen 1 und 5 mm erfolgt.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Pressen von beiden Seiten des Metallbleches und vorzugsweise in im wesentlichen gleichem Abstand zum Lochrand (9) erfolgt.
- Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß durch das Pressen ringförmig umlaufende Nuten (7) beiderseits in das Metallblech eingedrückt werden.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die Nuten (7) mit trapezförmigem Querschnitt erzeugt werden.
- Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Pressen des Metallbleches in einem Abstand zum Lochrand des Metallbleches (2) erfolgt, welcher kleiner ist als die Dicke des Metallbleches, vorzugsweise kleiner als die Hälfte der Metallblechdicke.
- Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Pressung des Metallbleches derartig erfolgt, daß am Lochrand jeweils an der Oberseite und der Unterseite des Wandbleches (2) gegenüber dem übrigen Dickenbereich des Wandbleches vorspringende Lochrandkanten erzeugt werden.
- Brennerelektrode mit einer den keramischen Isolierkörper (3) der Elektrode (1) in einer Bohrung (6) aufnehmenden Halteblech (2), dadurch gekennzeichnet, daß zwischen dem Rand (9) der Bohrung (6) und dem Keramikkörper (3) ein elastischer und/oder plastischer Dichtungsring (4, 4') angeordnet ist.
- Brennerelektrode nach Anspruch 11, dadurch gekennzeichnet, daß der Dichtungsring derart angeordnet ist, daß zwischen dem Keramikkörper (3) der Elektrode (1) und dem Halteblech (2) kein unmittelbarer Kontakt besteht.
- Brennerelektrode nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß der Keramikkörper (3) eine umlaufende Nut (8) zur mindestens teilweisen Aufnahme des Dichtungsringes (4, 4') aufweist.
- Brennerelektrode nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, daß der Lochrand eine umlaufende Vertiefung (10) zur mindestens teilweisen Aufnahme des Dichtungsringes (4, 4') aufweist.
- Brennerelektrode nach Anspruch 14, dadurch gekennzeichnet, daß mindestens eine vorstehende Lochrandkante mit der Oberfläche des Keramikkörpers (3) in direktem Kontakt steht.
- Brennerelektrode nach einem der Ansprüche 11 bis 15, dadurch gekennzeichnet, daß die entlang des Lochrandes in das Blech eingeprägten Nuten einen trapezförmigen Querschnitt haben.
- Brennerelektrode nach einem der Ansprüche 11 bis 16, dadurch gekennzeichnet, daß der zwischen Lochrand (9) und Keramikkörper (3) eingepreßte Dichtring (4') in axialer Richtung der Bohrung (6) ein die Dicke des Haltebleches (2) übersteigendes Maß aufweist.
- Brennerelektrode nach einem der Ansprüche 11 bis 17, dadurch gekennzeichnet, daß der Dichtring aus einem Elastomeren, vorzugsweise einem temperaturbeständigen Elastomeren, und insbesondere aus PTFE, EPTM oder Silikon besteht.
- Brennerelektrode nach einem der Ansprüche 11 bis 17, dadurch gekennzeichnet, daß der Dichtring (4') aus einem plastisch verformbaren Material, wie z. B. Kupfer oder einer Kupferlegierung besteht.
- Brennerelektrode nach einem der Ansprüche 11 bis 19, dadurch gekennzeichnet, daß der Dichtring (4') vor dem Befestigen einen runden, rechteckigen oder X-förmigen Querschnitt hat.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI9830409T SI0930464T1 (en) | 1998-01-20 | 1998-11-11 | Method and system for sealingly mounting a burner electrode |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19801913A DE19801913A1 (de) | 1998-01-20 | 1998-01-20 | Verfahren und Vorrichtung für das abgedichtete Befestigen einer Brennerelektrode |
DE19801913 | 1998-01-20 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0930464A2 true EP0930464A2 (de) | 1999-07-21 |
EP0930464A3 EP0930464A3 (de) | 2000-04-19 |
EP0930464B1 EP0930464B1 (de) | 2003-04-23 |
Family
ID=7855105
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98121428A Expired - Lifetime EP0930464B1 (de) | 1998-01-20 | 1998-11-11 | Verfahren und Vorrichtung für das abgedichtete Befestigen einer Brennerelektrode |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0930464B1 (de) |
DE (2) | DE19801913A1 (de) |
ES (1) | ES2195256T3 (de) |
SI (1) | SI0930464T1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005111500A2 (en) * | 2004-05-17 | 2005-11-24 | Castfutura S.P.A. | System for fastening spark plugs of boilers or the like |
CN101929686A (zh) * | 2009-06-26 | 2010-12-29 | 博西华电器(江苏)有限公司 | 燃气灶 |
ITGE20100053A1 (it) * | 2010-05-18 | 2011-11-19 | Castfutura Spa | Metodo e dispositivo di fissaggio per candele d'accensione di caldaie o simili |
US8233260B2 (en) | 2007-03-26 | 2012-07-31 | Itw Industrial Components S.R.L. Con Unico Socio | Compact gas lighting device for an electric household appliance |
CN101749743B (zh) * | 2008-12-16 | 2013-07-31 | 博西华电器(江苏)有限公司 | 燃气灶 |
CN106152182A (zh) * | 2016-07-18 | 2016-11-23 | 广东美的厨房电器制造有限公司 | 一种灶具点火针的固定装置及灶具 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT515792B1 (de) * | 2014-07-28 | 2015-12-15 | Marco Gehrer | Kaminofen |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2237131A1 (en) * | 1973-07-03 | 1975-02-07 | Saunier Duval | Gas pilot light with igniter and thermocouple - gas pipe is covered with an injector wedged through deflector plate |
GB2083187A (en) * | 1980-09-06 | 1982-03-17 | Neff Werke | Ignition device for a gas burner |
US4527085A (en) * | 1983-02-22 | 1985-07-02 | Honeywell Inc. | High voltage spark electrode structure |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7933687U1 (de) * | 1979-11-29 | 1980-03-06 | Gebrueder Cramer, 5750 Menden | Kochmulde fuer einen gasherd |
DE8914109U1 (de) * | 1989-11-30 | 1990-01-25 | Meku Metall- Und Kunststoff-Verarbeitungs-Gmbh, 7735 Dauchingen, De | |
AT397852B (de) * | 1992-08-03 | 1994-07-25 | Vaillant Gmbh | Zündelektrode |
-
1998
- 1998-01-20 DE DE19801913A patent/DE19801913A1/de not_active Withdrawn
- 1998-11-11 ES ES98121428T patent/ES2195256T3/es not_active Expired - Lifetime
- 1998-11-11 EP EP98121428A patent/EP0930464B1/de not_active Expired - Lifetime
- 1998-11-11 DE DE59808056T patent/DE59808056D1/de not_active Expired - Lifetime
- 1998-11-11 SI SI9830409T patent/SI0930464T1/xx unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2237131A1 (en) * | 1973-07-03 | 1975-02-07 | Saunier Duval | Gas pilot light with igniter and thermocouple - gas pipe is covered with an injector wedged through deflector plate |
GB2083187A (en) * | 1980-09-06 | 1982-03-17 | Neff Werke | Ignition device for a gas burner |
US4527085A (en) * | 1983-02-22 | 1985-07-02 | Honeywell Inc. | High voltage spark electrode structure |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005111500A2 (en) * | 2004-05-17 | 2005-11-24 | Castfutura S.P.A. | System for fastening spark plugs of boilers or the like |
WO2005111500A3 (en) * | 2004-05-17 | 2006-06-01 | Cast S P A | System for fastening spark plugs of boilers or the like |
US8233260B2 (en) | 2007-03-26 | 2012-07-31 | Itw Industrial Components S.R.L. Con Unico Socio | Compact gas lighting device for an electric household appliance |
CN101749743B (zh) * | 2008-12-16 | 2013-07-31 | 博西华电器(江苏)有限公司 | 燃气灶 |
CN101929686A (zh) * | 2009-06-26 | 2010-12-29 | 博西华电器(江苏)有限公司 | 燃气灶 |
CN101929686B (zh) * | 2009-06-26 | 2015-08-05 | 博西华电器(江苏)有限公司 | 燃气灶 |
ITGE20100053A1 (it) * | 2010-05-18 | 2011-11-19 | Castfutura Spa | Metodo e dispositivo di fissaggio per candele d'accensione di caldaie o simili |
CN106152182A (zh) * | 2016-07-18 | 2016-11-23 | 广东美的厨房电器制造有限公司 | 一种灶具点火针的固定装置及灶具 |
CN106152182B (zh) * | 2016-07-18 | 2018-09-14 | 广东美的厨房电器制造有限公司 | 一种灶具点火针的固定装置及灶具 |
Also Published As
Publication number | Publication date |
---|---|
EP0930464B1 (de) | 2003-04-23 |
SI0930464T1 (en) | 2003-08-31 |
DE59808056D1 (de) | 2003-05-28 |
ES2195256T3 (es) | 2003-12-01 |
DE19801913A1 (de) | 1999-07-22 |
EP0930464A3 (de) | 2000-04-19 |
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