EP1533566A2 - Mischeinrichtung für einen Brenner - Google Patents
Mischeinrichtung für einen Brenner Download PDFInfo
- Publication number
- EP1533566A2 EP1533566A2 EP04026676A EP04026676A EP1533566A2 EP 1533566 A2 EP1533566 A2 EP 1533566A2 EP 04026676 A EP04026676 A EP 04026676A EP 04026676 A EP04026676 A EP 04026676A EP 1533566 A2 EP1533566 A2 EP 1533566A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting disc
- air nozzle
- mixing device
- burner tube
- tube
- 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- Withdrawn
Links
Images
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
- F23D11/40—Mixing tubes or chambers; Burner heads
- F23D11/404—Flame tubes
-
- 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
- F23D11/40—Mixing tubes or chambers; Burner heads
- F23D11/406—Flame stabilising means, e.g. flame holders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/11403—Flame surrounding tubes in front of burner nozzle
Definitions
- the invention relates to a mixing device for a burner for fossil fuels according to the preamble of claim 1.
- the fuel through a nozzle in a flame tube injected.
- the combustion air is by means of a blower supplied via a burner tube, which coaxially the nozzle receives.
- a cutting disc closes the interior of the Burner tube against the interior of the axially adjoining Flame tube off.
- the combustion air is through a nozzle supplied to the burning flame in the flame tube.
- the nozzle is arranged at a central opening of the cutting disc and Coaxially surrounds the nozzle.
- a mixing device of this Genus is known for example from EP 0 777 084 B1. In this known mixing device which is conical tapered air nozzle on the downstream side of the flame tube the cutting disc and arranged on the cutting disc rigidly attached.
- the invention is based on the object, a mixing device for a fossil fuel burner of this genus with regard to its combustion characteristics.
- the air nozzle is on the upstream burner tube side of the blade arranged and dives with her conically rejuvenating Insert the outlet end into the centric opening of the cutting disc.
- the air nozzle therefore protrudes only over a small axial length in the flame tube.
- the air nozzle sits with its conical outer surface in the centric opening of the cutting disc and supports itself with their scope at the cutting disc. A rigid connection the air nozzle with the cutting disc, e.g. by welding unavailable.
- the air nozzle can therefore exactly coaxial with the Nozzle stick to be adjusted. There is a slight tilting the axis of the air nozzle and the nozzle block opposite the level of the cutting disc possible without thereby affecting the the burner flame crucial adjustment between nozzle block and air nozzle is affected.
- the mixing device can therefore manufactured as a precisely adjusted unit. slight Mounting tolerances when inserting the mixing device in the burner tube or the flame tube affect this Do not adjust. In addition, this results in the advantage that the mixing device as a unit in identical design for different types of burners can be used.
- the air nozzle in its conical outer surface on a peripheral level, with which they are on the burner tube side surface of the partition supported.
- a structurally particularly expedient embodiment is a Bracket provided, the burner tube side of the air nozzle engages and the air nozzle axially in the opening of the cutting disc sitting tense.
- the holder is preferably applied the burner tube end of the air nozzle on and surrounds the Air nozzle on its outer circumference and is on the burner tube side at the Cutting disc attached.
- the holder expedient also a hub, which receives the nozzle and holds.
- the entire mixing device consisting from separating disc, air nozzle and bracket a separate Unit that is inserted into the burner and the nozzle adjusted takes up.
- a swirl device is inserted into the air nozzle, which may be formed in a manner known per se.
- the swirl device at the air inlet end the air nozzle arranged swirl vanes, which in the flow direction protrude into the air nozzle and against the air flow direction are inclined.
- the mixing device can with their cutting disc in different Way in the burner tube or in this subsequent flame tube can be arranged.
- an inner shoulder arranged, on which the cutting disc axially abutting.
- a sealing ring inserted between the inner shoulder and the cutting disc.
- the cutting disc its outer periphery has a cylindrical surface on the inner wall the burner tube or the subsequent flame tube is applied. With this cylindrical surface is the cutting disc and so that the entire mixing device sealed at the periphery axially displaceable in the burner tube or the flame tube.
- the cutting disc further has air passage holes on that in the circular area outside the air nozzle are arranged. Through these air openings Additional air jets emerge from the burner tube out into the fire tube. This additional feed Combustion air is advantageous at higher burner outputs, in which a larger volume flow of combustion air is needed. This outside the air nozzle in the flame tube entering air jets also cause that no dead air spaces outside the air nozzle on the partition form, which could lead to a soot deposit. Next has showed that these additional air jets a Noise reduction of the burner flame can be achieved.
- FIG. 1 shows schematically the basic structure of the burner with the Mixing device.
- a hollow cylindrical burner tube 10th closes coaxially a hollow cylindrical flame tube 12th at.
- the burner tube 10 and the flame tube 12 may be in one piece be formed or are preferably interconnected Individual tubes.
- the internal volume of the burner tube 10 is opposite the inner volume of the flame tube 12 by a cutting disc 14 separated.
- the cutting wheel 14 is through a central circular opening 16 pierced.
- an air nozzle 18 is inserted, which is in the direction tapered from the burner tube 10 to the flame tube 12.
- a nozzle 20 is used, the Fuel nozzle 22 in the flow direction before the outlet end the air nozzle 18 is arranged.
- the burner tube 10 In front the burner tube 10 is the jacket of the flame tube 12 by recirculation 26 pierced on a perimeter of the flame tube 12 are arranged.
- the fuel e.g. Oil supplied and by means of Fuel nozzle 22 sprayed into the flame tube 12.
- the fuel is ignited in the flame tube 12 by the ignition electrodes 24.
- combustion air By means of a blower combustion air is the burner tube 10 supplied.
- the cutting disc 14 dams the combustion air in the burner tube 10, whereby an increased pressure of the combustion air is built in the burner tube 10.
- the combustion air flows through the air nozzle under this increased pressure 18 in the flame tube 12 and the burner flame is coaxial supplied to the atomized fuel.
- the flame tube 12 protrudes in a combustion chamber. Combustion air from the combustion chamber is due to the flame flow over the recirculation openings 26 sucked into the flame tube 12.
- the cutting disc 14 is a circular disc, the center from the concentric circular opening 16 is. Outside the opening 16, the cutting disc 14 has two Holes 28 through which the ignition electrodes 24 passed become. Diametrically to these holes 28 is another Hole 30 intended for flame monitoring.
- the air nozzle 18 has substantially the shape of a hollow cone.
- the term "cone” is not on a cone with limited straight line, but includes any geometric Form that is rotationally symmetric to the central axis and at least in the flame tube 12 facing area in Flow direction continuously tapered in diameter.
- the air nozzle 18 is e.g. slightly dome-shaped arched outward.
- the in the flame tube 12 directed outlet end of the air nozzle 18 is open and facing a diameter slightly larger than the outer diameter the fuel nozzle 22, so that between the fuel nozzle 22 and the air nozzle 18 an annular air outlet for the combustion air supplied through the air nozzle 18 is formed.
- the outer circumferential surface of the air nozzle 18 has a peripheral stage 32 generated by, for example, that the front end of the air nozzle 18 is turned off.
- the circumference level 32 is in the axial region of the air nozzle 18, in which the outer diameter of the inner diameter the opening 16 corresponds.
- FIG. 3 can in this way the air nozzle 18 from the burner tube side be inserted into the opening 16 of the blade 14.
- the downstream outlet end of the air nozzle 18 protrudes over a small axial length through the blade 14 into the Flame tube 12.
- a twisting device 34 is used, e.g. in FIG Individual is shown.
- the swirl device has the form of a Annular ring disk, from which swirl blades 36 broken out and bent in the air flow direction in the air nozzle 18 inside are.
- the swirl vanes 36 are against the flow direction of the Air, i. angled against the axial plane of the air nozzle 18, whereby the entering into the air nozzle 18 combustion air a swirl is given around the central axis.
- the blade 14 also still air passage holes 38 on, preferably on a pitch circle around the centric opening 16 are arranged. Through these air passage holes 38 can additionally combustion air from the burner tube 10 coaxially around the air nozzle 18 around in the flame tube 12 inflow.
- FIGS. 5 to 7 show a first exemplary embodiment.
- a holder 40 serves to the air nozzle 18 in the opening 16 of the blade 14 sitting to hold axially.
- the holder 40 has two support elements 42 on.
- the support members 42 are stamped sheet metal parts, respectively bent at right angles so that two wings are formed, whose plane encloses the central axis of the burner tube 10.
- the support members 42 are mirror symmetrical to each other arranged and joined together by two welded rings. held.
- the two rings 44 are axially against each other offset and arranged concentrically to the central axis. Thereby form the two rings 44 and extending between these rings Regions of the support elements 42, the cylinder surface-like bent to the outside, a hub, in which the nozzle 20 inserted and fixed by radial screws 46 can be.
- the holder 40 is from the burner tube side Centered on the center into the opening 16 of the cutting disc 14 inserted air nozzle 18 attached. This is aligned with the hub formed by the rings 44 axially with the twisting device 34 of the air nozzle 18.
- the wing parts of the support elements 42nd engage over the outer circumference of the air nozzle 18 with support struts 48, the burner tube side sit on the blade 14 and attached to this blade 14, e.g. by Welding.
- the with the support struts 48 on the cutting disc 14th fastened bracket thus clamps by means of the rings 44 formed hub, the air nozzle 18 axially on the cutting disc 14, wherein the air nozzle 18 with its peripheral stage 32 at the blade 14 is supported.
- the in the through the rings 44 formed hub inserted nozzle 20 is in this way axially exactly centered in the air nozzle 18.
- the cutting disc 14 and the bracket 40 with the air nozzle 18 and the nozzle 20th could move in certain tolerances against each other, e.g. due to installation tolerances or due to thermal deformations, without thereby coaxially centered adjustment of the Nozzle stocks 20 and the fuel nozzle 22 with respect to Air nozzle 18 is affected.
- the cutting disc 14 on its outer periphery an axially recessed peripheral shoulder 50 on.
- the mixing device with the cutting disc 14 inserted into the burner tube 10, so is the blade 14 with its peripheral shoulder 50 axially on an inner shoulder 52 of the burner tube 10, which in Figure 1 schematically is indicated.
- a sealing ring can be inserted between the inner shoulder 52 of the burner tube 10 and the peripheral shoulder 50 of the blade 14th so that a reliable Sealing of the burner tube 10 against the flame tube 12th is ensured by the blade 14.
- FIGs 8 and 9 is a second embodiment of the mixing device shown.
- the Holder 40 with the holder of the first embodiment match.
- the cutting wheel 14 has in this embodiment, however, at their Outer circumference of a deep-drawn cylindrical surface 54, which is from the plane of the cutting disc 14 against the burner tube side extends.
- the blade 14 sits and thus the entire mixing device by means of the cylindrical surface 54 coaxially guided in the burner tube 10.
- the cylindrical surface 54 serves both for coaxial guidance of the mixing device in the burner tube 10 as well as for peripheral sealing. By means of the cylindrical surface 54, the mixing device axially displaced and adjusted in the burner tube 10.
- FIG. 10 shows a third embodiment, different from the second embodiment Design differs in that the cylinder surface 54 from the plane of the cutting disk 14 in the flow direction, i.e. extends into the flame tube 12 inside.
- the cylinder surface 54 may not only guide and seal serve the mixing device.
- Figures 11 and 12 is a fourth embodiment which, compared to the preceding embodiments, in particular by the configuration of the holder 40th different.
- the holder has a hub on, which has the shape of a cylindrical sleeve 56.
- the sleeve 56 is seated with its downstream end centered in the Swirl device 34 and thus centered in the air nozzle 18th
- the sleeve 56 serves to receive the nozzle assembly 20, by means of a screw 46 is clamped in the sleeve 56.
- One Support member 58 is formed as a sheet metal stamping and has an inner ring 60, from which radially three support struts 62 stick out.
- the inner ring 60 becomes the upstream end the sleeve 56 centered.
- the support struts 62 are bent at right angles from the inner ring 60, embrace the Air nozzle 18 at the outer periphery and sit on the cutting disc 14, with which they e.g. connected by spot welding become.
- FIGS 13 and 14 show a fifth embodiment, which again distinguished by the formation of the holder 40.
- the air nozzle 18 or the am Entry end of the air nozzle 18 arranged swirl device 34th three outwardly projecting tabs 64 on.
- One as a sleeve 66th formed hub, which serves to receive the nozzle assembly 20, is placed on the twisting device 34.
- On the sleeve 66 are formed three radially projecting arms 68, with the tabs 64 come to cover.
- Outside the air nozzle 18 are three support posts 70 arranged.
- the support posts 70 sit at one end on the cutting disc 14 and are fixed with this connected. At the other end, the support posts pass through 70 axial bores the tabs 64 and the arms 68 and are with these connected.
- the blade is 14 at its outer periphery only with a chamfer 72nd educated.
- the blade 14 is applied an inner shoulder 52 of the burner tube 10, wherein the chamfer 72 inserting a sealing ring between the Cutting disc 14 and the inner shoulder 52 is facilitated.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
Description
- Fig. 1
- in einem schematischen Axialschnitt die in den Brenner eingesetzte Mischeinrichtung,
- Fig. 2
- die Grundbauteile der Mischeinrichtung in einer perspektivischen Explosionsdarstellung,
- Fig. 3
- diese Grundbauteile im zusammengebauten Zustand,
- Fig. 4
- eine perspektivische Ansicht der Luftdüse von der Brennerrohrseite,
- Fig. 5
- eine perspektivische Explosionsdarstellung der gesamten Mischeinrichtung in einer ersten Ausführung,
- Fig. 6
- diese Mischeinrichtung im zusammengebauten Zustand,
- Fig. 7
- diese Mischeinrichtung in einer perspektivischen Ansicht von der Brennerrohrseite,
- Fig. 8
- eine perspektivische Explosionsdarstellung der Mischeinrichtung in einer zweiten Ausführung,
- Fig. 9
- die Mischeinrichtung der zweiten Ausführung im zusammengebauten Zustand,
- Fig. 10
- die Mischeinrichtung in einer dritten Ausführung,
- Fig. 11
- eine perspektivische Explosionsdarstellung der Mischeinrichtung in einer vierten Ausführung,
- Fig. 12
- die Mischeinrichtung der vierten Ausführung im zusammengebauten Zustand von der Brennerrohrseite,
- Fig. 13
- eine perspektivische Explosionsdarstellung der Mischeinrichtung in einer fünften Ausführung und
- Fig. 14
- die Mischeinrichtung der fünften Ausführung im zusammengebauten Zustand von der Brennerrohrseite.
- 10
- Brennrohr
- 12
- Flammrohr
- 14
- Trennscheibe
- 16
- Öffnung
- 18
- Luftdüse
- 20
- Düsenstock
- 22
- Brennstoffdüse
- 24
- Zündelektroden
- 26
- Rezirkulationsöffnungen
- 28
- Löcher für 24
- 30
- Loch für Flammenüberwachung
- 32
- Umfangsstufe
- 34
- Dralleinrichtung
- 36
- Drallflügel
- 38
- Luftdurchtrittslöcher
- 40
- Halterung
- 42
- Stützelemente
- 44
- Ringe
- 46
- Schrauben
- 48
- Stützstreben
- 50
- Umfangsschulter
- 52
- Innenschulter
- 54
- Zylinderfläche
- 56
- Hülse
- 58
- Stützelement
- 60
- Innenring
- 62
- Stützstreben
- 64
- Laschen
- 66
- Hülse
- 68
- Arme
- 70
- Stützpfosten
- 72
- Fase
Claims (9)
- Mischeinrichtung für einen Brenner für fossile Brennstoffe, der ein Brennerrohr (10), ein sich an das Brennerrohr (10) anschließendes Flammrohr (12) und einen in dem Brennerrohr (10) angeordneten Düsenstock (20) aufweist, mit einer den Innenraum des Flammrohres (12) gegen den Innenraum des Brennerrohres (10) abschließenden Trennscheibe (14), mit einer zentrischen Öffnung (16) der Trennscheibe (14), mit einer koaxial an der Öffnung (16) der Trennscheibe (14) angeordneten Luftdüse (18), die sich konisch verjüngt in das Flammrohr (12) hinein erstreckt und Verbrennungsluft aus dem Brennerrohr (10) in das Flammrohr (12) führt, und mit einer Halterung (40), die den Düsenstock (20) koaxial in dem Brennerrohr (10) hält,
dadurch gekennzeichnet, dass der Außendurchmesser der Luftdüse (18) sich von einem Durchmesser, der größer ist, als der Durchmesser der Öffnung (16) der Trennscheibe (14), auf einen Durchmesser verjüngt, der kleiner ist als der Durchmesser der Öffnung (16), und dass die Luftdüse (18) von der Brennerrohrseite koaxial in die Öffnung (16) der Trennscheibe (14) eintaucht und mit ihrem Umfang axial an der Trennscheibe (14) abgestützt ist. - Mischeinrichtung nach Anspruch 1,
dadurch gekennzeichnet, dass die Luftdüse (18) an ihrem Außenumfang eine Umfangsstufe (32) aufweist, mit welcher sie sich an der Trennscheibe (14) abstützt. - Mischeinrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die Luftdüse (18) durch die Halterung (40) axial in der Öffnung (16) der Trennscheibe (14) sitzend gehalten ist. - Mischeinrichtung nach Anspruch 3,
dadurch gekennzeichnet, dass die Halterung (40) brennerrohrseitig an der Luftdüse (18) anliegt und Stützelemente (42, 48; 58, 62; 70) aufweist, die die Luftdüse (18) an deren Außenumfang umgreifen und brennerrohrseitig an der Trennscheibe (14) befestigt sind. - Mischeinrichtung nach Anspruch 4,
dadurch gekennzeichnet, dass die Halterung (40) eine den Düsenstock (20) aufnehmende Nabe (44; 56; 66) aufweist und mit dieser Nabe (44; 56; 66) an der Luftdüse (18) anliegt. - Mischeinrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Luftdüse (18) eine Dralleinrichtung (34) aufweist. - Mischeinrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass die Trennscheibe (14) mit ihrem Außenrand an einer Innenschulter (52) des Brennerrohres (10) bzw. des Flammrohres (12) axial anliegt. - Mischeinrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass die Trennscheibe (14) an ihrem Außenumfang eine Zylinderfläche (54) aufweist, mit welcher sie in dem Brennerrohr (10) bzw. dem Flammrohr (12) axial verschiebbar gehalten ist. - Mischeinrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Trennscheiben (14) in dem radial außerhalb der Luftdüse (18) liegenden Bereich Luftdurchtrittslöcher (38) aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20317839U DE20317839U1 (de) | 2003-11-18 | 2003-11-18 | Mischeinrichtung für einen Brenner |
DE20317839U | 2003-11-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1533566A2 true EP1533566A2 (de) | 2005-05-25 |
EP1533566A3 EP1533566A3 (de) | 2007-07-25 |
Family
ID=34399763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04026676A Withdrawn EP1533566A3 (de) | 2003-11-18 | 2004-11-10 | Mischeinrichtung für einen Brenner |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1533566A3 (de) |
DE (1) | DE20317839U1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2295857A3 (de) * | 2009-08-07 | 2012-05-30 | Dome Holding GmbH | Mischkopf mit axial verstellbarem Düsenstock |
ITBO20120024A1 (it) * | 2012-01-19 | 2013-07-20 | Alessandro Giberti S R L Con Unico Socio | Dispositivo bruciatore per un sistema di combustione |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202006013853U1 (de) * | 2006-09-07 | 2006-12-21 | Meku Metallverarbeitungs Gmbh & Co. Kg | Mischeinrichtung für einen Brenner |
CN110657432A (zh) * | 2019-11-05 | 2020-01-07 | 陈毅 | 混合腔中置的完全上进风燃烧器 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR890000327B1 (ko) * | 1984-04-19 | 1989-03-14 | 도오도오 기기 가부시기가이샤 | 액체연료 기화식 버어너의 연소 방법및 그 장치 |
DE4430888A1 (de) * | 1993-12-18 | 1995-07-06 | Deutsche Forsch Luft Raumfahrt | Einstellbarer Blaubrenner |
DE29508424U1 (de) * | 1995-05-20 | 1996-09-19 | Elco Energiesysteme AG, Vilters, St. Gallen | Brenner |
DE29518919U1 (de) * | 1995-11-29 | 1996-01-25 | MEKU Metallverarbeitungs-GmbH, 78083 Dauchingen | Mischeinrichtung für einen Brenner |
DE19629954A1 (de) * | 1996-07-25 | 1998-01-29 | Buderus Heiztechnik Gmbh | Brenner für flüssige oder gasförmige Brennstoffe |
DE19652291A1 (de) * | 1996-08-08 | 1998-06-18 | Buderus Heiztechnik Gmbh | Mischeinrichtung mit Gebläse und Flammrohr für einen Öl- oder Gasbrenner |
EP0864812A3 (de) * | 1997-03-12 | 1999-06-16 | A. Schwarz + Co. | Mischeinrichtung für Gas- und Ölbrenner |
DE19738054C2 (de) * | 1997-09-01 | 2002-06-20 | Heinrich Koehne | Verfahren und Vorrichtung zur Veränderung der Drallzahl der Verbrennungsluft eines Brenners während des Betriebes |
ATE374904T1 (de) * | 2001-03-20 | 2007-10-15 | Riello Spa | Ölbrenner |
-
2003
- 2003-11-18 DE DE20317839U patent/DE20317839U1/de not_active Expired - Lifetime
-
2004
- 2004-11-10 EP EP04026676A patent/EP1533566A3/de not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2295857A3 (de) * | 2009-08-07 | 2012-05-30 | Dome Holding GmbH | Mischkopf mit axial verstellbarem Düsenstock |
ITBO20120024A1 (it) * | 2012-01-19 | 2013-07-20 | Alessandro Giberti S R L Con Unico Socio | Dispositivo bruciatore per un sistema di combustione |
Also Published As
Publication number | Publication date |
---|---|
EP1533566A3 (de) | 2007-07-25 |
DE20317839U1 (de) | 2005-03-31 |
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