EP2848863A2 - Grille pivotant de four avec dispositif de nettoyage - Google Patents

Grille pivotant de four avec dispositif de nettoyage Download PDF

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Publication number
EP2848863A2
EP2848863A2 EP14184473.8A EP14184473A EP2848863A2 EP 2848863 A2 EP2848863 A2 EP 2848863A2 EP 14184473 A EP14184473 A EP 14184473A EP 2848863 A2 EP2848863 A2 EP 2848863A2
Authority
EP
European Patent Office
Prior art keywords
grate
combustion chamber
bars
operating position
evacuation
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Withdrawn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
EP14184473.8A
Other languages
German (de)
English (en)
Other versions
EP2848863A3 (fr
Inventor
Andreas Kurzmann
Walter Mayr-Riedler
Roman Ranftl
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.)
F Huemer GmbH
Original Assignee
F Huemer 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
Application filed by F Huemer GmbH filed Critical F Huemer GmbH
Publication of EP2848863A2 publication Critical patent/EP2848863A2/fr
Publication of EP2848863A3 publication Critical patent/EP2848863A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H15/00—Cleaning arrangements for grates; Moving fuel along grates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H1/00—Grates with solid bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H13/00—Grates not covered by any of groups F23H1/00-F23H11/00
    • F23H13/02—Basket grates, e.g. with shaking arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H13/00—Grates not covered by any of groups F23H1/00-F23H11/00
    • F23H13/06—Dumping grates

Definitions

  • the invention relates to an oven with a combustion chamber forming a combustion chamber and with a pivotable about a pivot axis grate, which cover grate in an operating position a grate opening of the combustion chamber, wherein a combustion surface formed by the grate bounds the combustion chamber on one side.
  • the invention relates to a pellet stove for burning pellets, preferably wood pellets, wherein the combustion chamber is formed by a burn pot.
  • the operating position is that position of the grate which it typically occupies during a combustion process, and with the firing surface one of the grate elements, e.g. Grate bars or a grate, formed in the operating position surface within the combustion chamber, above which the kiln is held. Accordingly, the firing area is generally equal to or smaller than the surface or top of the grate.
  • the burning surface may or may not be in the operating position in a plane with the grate opening; For example, compared to the grate opening inwardly offset into the combustion chamber fuel surface would be conceivable and possible. Accordingly, the grate opening is covered by the grate even if the entire grate is disposed in the grate opening, i.
  • the grate always covers the grate opening when it is suitable for holding the material to be fired in the combustion chamber or substantially preventing the firing material from escaping through the grate opening in the operating position. For example, prevents the rust in a pellet stove in the operating position, a leakage of pellets from the combustion chamber and at the same time allows an air supply into the combustion chamber through the grate.
  • Such a furnace is already out of the AT 505 382 B1 known, which shows a furnace for the combustion of wood pellets, wherein the bottom of the combustion chamber is formed by a pivotable about a horizontally arranged pivot axis turntable grid.
  • ovens with pivoting grate or rust parts are also from the CN 201110570 Y and from the JP 52101256 U known, in each of which two pivot axes are provided for two separate grate parts.
  • the known pivotable grates are thus suitable as ash or pellet residues, which in operation, i. during the actual combustion, have not fallen through the rust, throw off by pivoting the grate or the rust parts.
  • the pivoting of the rust in the combustion chamber remaining combustion residues especially so-called "bridges" of ash and slag, ash cake or other solidified or adhering to a wall of the combustion chamber residues can not remove.
  • These incineration residues or wastes can subsequently lead to malfunctions or at least reduce the efficiency of the furnace.
  • the pivot axis extends substantially laterally next to the grate opening and the evacuation element is connected to the grate substantially at an edge of the firing surface adjacent to the pivot axis. Due to the fact that the pivot axis extends laterally next to the grate opening, essentially the entire grate opening can be released when swiveling, so that even large residues can be removed from the combustion chamber. By moving from one side when swiveling the grate through the combustion chamber evacuation element, the residues formed above the grate in the combustion chamber are additionally transported out of the combustion chamber and then dropped from the grate.
  • the shape and dimension of the evacuation element is selected so that the evacuation element sweeps over a portion of the grate opening upon pivoting of the grate about the pivot axis.
  • an ash cake formed in operation directly above the grate can be thoroughly removed.
  • the shape and dimension is adapted to the combustion chamber, ie in particular to the dimensions of the combustion chamber.
  • the evacuation element is substantially so long that it is at the transition from the operating position in the open position of the grate covers almost the entire grate opening.
  • the evacuation element projects approximately so far into the combustion chamber that it approximates when pivoting the grate extends to one of the pivot axis opposite side wall of the combustion chamber.
  • An optimum effect of the evacuation element can be achieved if the shape of the combustion chamber is adapted to the movement of the evacuation element, for example with a partially cylindrical side wall, so that the evacuation element can reach and cover substantially the entire combustion chamber.
  • the evacuation element in the operating position of the grate is arranged substantially parallel to a side wall of the combustion chamber, any connections of combustion residues with the relevant side wall in the sections concealed by the evacuation element can be avoided.
  • the combustion chamber is advantageously limited by the evacuation element advantageously, and the evacuation element is hardly a limitation for the usable Brenngut.
  • the grate in the operating position has substantially parallel grate bars which define the firing surface of the grate, wherein at least a portion of the grate bars is movable relative to the firing surface, in particular tiltable from the firing surface.
  • the term grate bar is intended to indicate a substantially elongated shape of the grate elements and means no restriction on the cross section of the grate elements. In particular, in addition to round and triangular in cross-section square grate bars or grate bars with a more complicated profile, such as a T or H-profile, conceivable.
  • a simple construction of the grate can be achieved if the movable grate bars are connected via a tilting axis with the grate or with the remaining grate bars, which tilting axis is arranged parallel to the pivot axis and offset from the evacuation element, the movable grate bars preferably being displaceable on the tilting axis are stored.
  • the movable grate bars By a staggered arrangement with respect to the evacuation element ensures that the movable grate bars can also remove the combustion element adhering to the evacuation.
  • a sliding bearing allows not only the tilting movement, a relative displacement of the grate bars, so that in this way any connections that block a tilting movement, can be broken by the displacement.
  • the movable grate bars In connection with the movable grate bars, it is particularly advantageous if they are connected to a driving lever which is adapted to cooperate with the pivoting of the grate with respect to the combustion chamber fixedly arranged holding element for moving the movable grate bars, wherein the holding element is arranged, the Take hold lever when unfolding against the rust back.
  • the driving lever which is adapted to cooperate with the pivoting of the grate with respect to the combustion chamber fixedly arranged holding element for moving the movable grate bars, wherein the holding element is arranged, the Take hold lever when unfolding against the rust back.
  • this relative movement can take place jerkily when the grate falls below the weight of the combustion residues located on the grate, for example when a lock holding the grate in the operating position is released, and in the fall of the grate, i. After the grate has already been pivoted a little way, the driving lever abruptly hits the retaining element.
  • the cleaning of the combustion chamber and the grate when pivoting the grate is particularly effective when the grate forms a bottom of the combustion chamber, wherein the focal surface is substantially horizontal in the operating position.
  • any residues preferably accumulate directly on the Rust or above the focal surface and are thus optimally accessible to the evacuation element.
  • a drive preferably an electric motor
  • the drive is particularly useful for closing the grate after evacuation, i.
  • the evacuation may additionally assist and, for example, perform repeated pivoting operations of the grate for thorough cleaning.
  • a pellet stove 1 is shown with a combustion chamber 2 in the form of a burn pot.
  • a Grate 3 arranged, which in the in Fig. 1 shown operating position, the underside of the combustion chamber 2 and a grate opening 4 (see. Fig. 4 and 7 ) of the combustion chamber 2 covers.
  • the grate opening 4 is covered by the grate 3, the grate 3 or a burning surface 5 (see FIG. Fig. 3 ) of the grate 3 together with the combustion chamber 2, a combustion chamber 6, so that a recorded in the combustion chamber 6 Brenngut (not shown) is held by the grate 3 in the combustion chamber 2.
  • the grate opening 4 corresponds approximately to the base of the combustion chamber 6, wherein the grate 3 forms a substantially horizontal bottom of the combustion chamber 6 in the operating position.
  • the combustion chamber 2 has a substantially rectangular base with rounded corners.
  • annular collar 7, 8 is provided, wherein a jacket 9 of the combustion chamber 2 is formed by two intermeshing on the shorter sides shell pieces 10.
  • the shell pieces 10 are accordingly held together at the bottom and top of the surrounding annular collars 7, 8 and are connected to the annular collars 7, 8 to form the combustion chamber 2, for example, welded.
  • the jacket 9 of the combustion chamber 2 has in an upper region, slightly below the upper annular collar 8, air holes 11 through which a draft in the combustion chamber 6 is made possible.
  • the grate 3 is located on the underside of the combustion chamber 2 and closes with the jacket 9 from.
  • the grate 3 has a plurality of grate elements in the form of substantially parallel juxtaposed grate bars 12.
  • the tops of the grate bars 12 define a substantially continuous surface which is interrupted only by the distances between the grate bars 12; in particular, the grate bars 12 lie in one plane.
  • the focal surface is that part of the substantially continuous surface which is arranged in the operating position within the combustion chamber 2 and thus limits the combustion chamber.
  • the grate bars 12 are connected at least by a tilting axis 13, which is arranged orthogonal to the grate bars 12, wherein a part of the grate bars 14th (see. Fig. 4 ) is mounted tiltably and displaceably on the tilting axis 12.
  • the remaining, fixed grate bars 15 are connected to a crossbar 16 on which the movable grate bars 14 rest in the operating position.
  • the movable grate bars 14 are also penetrated by a driving rod 17, which may also have a rectangular cross-section and, accordingly, may be rotatably connected to the movable grate bars 14.
  • the driving rod 17 protrudes laterally beyond the grate 3, wherein with the two protruding ends of the driving rod 17 each a driving lever 18 is rotatably connected.
  • the driving lever 18 are perpendicular or at a variable angle to the grate 3 and in the operating position laterally adjacent to the combustion chamber 2 via the grate 3 addition.
  • a fixing screw 18 ' see. Fig. 4
  • Parallel to the grate bars 12 is on both sides of the grate 3, i. in addition to the outermost grate bars 12, in each case one grate support 19 is connected to the tilting axis 13 and the transverse bar 16.
  • the grate supports 18 hold the grate bars 12 at a distance from one below the grate bars 12, i.
  • the grate plate 20 is disposed parallel to the focal surface 5 and projects beyond the grate 3 on all four sides, so that it can also be used as a sealing plate to an ash box (not shown) down.
  • each one of the driving lever 18 associated, holding elements 21 are arranged.
  • the retaining elements 21 are connected, for example, to an outer wall (not shown) of the furnace, so that they are immovable or fixed with respect to the combustion chamber 2 and, upon pivoting of the grate 3 (cf. Fig. 4 ) interact with the driving levers 18.
  • the further structure of the grate 3 is particularly in the Fig. 2 and 3 can be seen, which also in Fig. 1 shown operating position of the arrangement show.
  • the grate plate 20 is connected on its side remote from the combustion chamber 2 underside via two fixed or spring-loaded connecting elements 22 with a support structure 23.
  • the support structure 23 is pivotally mounted on a pivot axis 24 and has guides 25, 26 which are adapted to operate the grate 3 by means of a roller (not shown) running between the guides 25, 26, the roller preferably being provided with a drive, For example, an electric motor is connected.
  • FIG. 3 Moreover, an evacuation element 27 protruding perpendicularly from the grate 3 into the combustion chamber 6 or into the combustion chamber 2 is shown.
  • the evacuation element 27 is essentially beam-shaped and arranged in the operating position parallel to the side wall 10 'of the combustion chamber 2 formed by a jacket piece 10, wherein it bears essentially against the side wall 10'. Accordingly, the evacuation element 27 is arranged on the edge of the combustion chamber 2 bounded by the combustion surface 5.
  • the evacuation element 27 extends over slightly more than half the height of the combustion chamber 6.
  • the grate 3 From the into the Fig. 1 to 3 shown operating position, the grate 3 about the pivot axis 24 in the in the Fig. 4 to 8 shown open position to be pivoted.
  • the grate 3 can be pivoted, ie both opened and closed, by actuation of the handle 25 or by a drive connected to the pivot axis 24, for example in the form of an electric motor (not shown).
  • the grate 3 When opening the grate 3, ie the transition from the operating position to the open position, the grate 3 is pivoted by the combustion chamber 2 down, the evacuation 27 follow the movement of the grate 3. Accordingly, the evacuation elements 27 are pivoted away from the side wall 10 'of the combustion chamber 2, where they essentially abut in the operating position and through the combustion chamber 6, so that any remaining in the combustion chamber 6 combustion residues, which are not already by gravity to the grate third follow, taken can be. In particular, bridges forming between the walls of the combustion chamber 2 inside the combustion chamber 2 can be destroyed and the fragments thus transported away.
  • the driving lever 18 each touch the associated holding element 21. Since the holding elements 21 do not follow the pivoting movement, the driving lever 18 in a support area 28 on one of the driving rod 17 opposite lying end of the driving lever 18 is retained by the holding elements 21. Since the driving lever 18 are connected via the driving rod 17 with the movable grate bars 14 which rest on the crossbar 16 until then, follow the movable grate bars 14 according to their displaceable and tiltable mounting on the tilting axis 13 of the movement of the driving lever 18. Here is the displacement the movable grate bars 14 by the dimensions of the slot 29 (see. Fig.
  • the tilting movement is limited by the dimensions of a recess 30 in the movable grate bars 14, in which the transverse axis 16 of the grate 3 is accommodated.
  • the open position thus corresponds to a maximum pivoting of the grate 3, which is limited by the position of the holding elements 21 and the storage of the movable grate bars 14.
  • waste held or adhered thereto between the evacuation elements 27 can also be removed, since the movable grate bars 14 slide from below between the evacuation elements 27 and emerge laterally from the evacuation elements 27.
  • the movable grate bars 14 slide from below between the evacuation elements 27 and emerge laterally from the evacuation elements 27.
  • the movable grate bars 14 slide from below between the evacuation elements 27 and emerge laterally from the evacuation elements 27.
  • the movable grate bars 14 slide from below between the evacuation elements 27 and emerge laterally from the evacuation elements 27.
  • the movable grate bars 14 slide from below between the evacuation elements 27 and emerge laterally from the evacuation elements 27.
  • the diameter of the spacers 31 on the transverse axis 16 is preferably greater than the diameter of the recess 30 in order to prevent skipping of the spacers 31.
  • FIGS. 7 and 8 the relative movement of the movable grate bars 14 is shown in detail.
  • the movable grate bars 14 are displaced in the open position with respect to the tilting axis 13 along the slot 29 in the direction of the pivot axis 24. Since the slot 29 has a rising from the pivot axis 24 away to the top of the grate bars 12 course, the movable grate bars 14 are moved in the region of the tilting axis 13 from the focal surface 5 down.
  • a total of four cleaning functions can be operated with only a single drive in the illustrated here preferred embodiment of a furnace according to the invention: first, the grate 3 is pivoted in a conventional manner; second, the movable grate bars 14 are displaced, and by the passage of the long hole 29, one side of the movable grate bars 14 is pulled down from the burning surface 5 (to the grate plate 20); third, the movable grate bars 14 are tilted about the tilting axis 13 and one side of the movable grate bars 14 is pushed upwards from the firing surface 5 (in the direction of the combustion chamber 6); and fourth, the evacuation elements 27 are passed through the combustion chamber 6.
  • evacuation elements 27 in the context of the present invention are analogously possible for the skilled person.
  • cutting or tine-like or else flat evacuation elements can be provided, which fulfill the function of buckets and are more suitable for shoveling the combustion space 6 of waste away.
  • the evacuation elements could be so matched to the combustion chamber, that they are sunk in the operating position in a side wall of the combustion chamber, so that a restriction of the combustion chamber is completely avoided.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Fuel Combustion (AREA)
  • Gasification And Melting Of Waste (AREA)
EP14184473.8A 2013-09-13 2014-09-11 Grille pivotant de four avec dispositif de nettoyage Withdrawn EP2848863A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50581/2013A AT514565B1 (de) 2013-09-13 2013-09-13 Ofen mit einer einen Brennraum bildenden Brennkammer

Publications (2)

Publication Number Publication Date
EP2848863A2 true EP2848863A2 (fr) 2015-03-18
EP2848863A3 EP2848863A3 (fr) 2015-04-01

Family

ID=51584938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14184473.8A Withdrawn EP2848863A3 (fr) 2013-09-13 2014-09-11 Grille pivotant de four avec dispositif de nettoyage

Country Status (2)

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EP (1) EP2848863A3 (fr)
AT (1) AT514565B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014014000A1 (de) * 2014-09-25 2016-03-31 Josef Schwan GmbH Dampfraucherzeuger
IT202100015035A1 (it) * 2021-06-09 2022-12-09 Laminox S R L Braciere per apparecchiature di riscaldamento a pellet
PL73156Y1 (pl) * 2021-01-29 2023-10-23 Defro Spolka Z Ograniczona Odpowiedzialnoscia Spolka Komandytowa Palnik do kotłów grzewczych z uchylnym rusztem samoczyszczącym
PL73155Y1 (pl) * 2021-12-17 2023-10-23 Defro Spolka Z Ograniczona Odpowiedzialnoscia Spolka Komandytowa Palnik do kotłów grzewczych z uchylnym rusztem samoczyszczącym

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2184292A (en) 1938-12-23 1939-12-26 James K Dukas Furnace grate
JPS52101256U (fr) 1976-01-30 1977-08-01
CN201110570Y (zh) 2007-09-14 2008-09-03 徐锡铜 排渣方便的煤炉
AT505382B1 (de) 2007-03-27 2009-04-15 Ortner Josef Ofen bzw. brenner fur die verfeuerung von festen stuckigen brennstoffen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US323929A (en) * 1885-08-11 Shaking-grate
US1545950A (en) * 1923-02-01 1925-07-14 Travis F Epes Grate cleaner
AT6972U1 (de) * 2003-06-13 2004-06-25 Hartl Energy Technology Keg Kleinfeuerungsanlage oder ofen für rieselfähige brennstoffe, insbesondere holzpellets, mit automatischer brennkammerentschlackung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2184292A (en) 1938-12-23 1939-12-26 James K Dukas Furnace grate
JPS52101256U (fr) 1976-01-30 1977-08-01
AT505382B1 (de) 2007-03-27 2009-04-15 Ortner Josef Ofen bzw. brenner fur die verfeuerung von festen stuckigen brennstoffen
CN201110570Y (zh) 2007-09-14 2008-09-03 徐锡铜 排渣方便的煤炉

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014014000A1 (de) * 2014-09-25 2016-03-31 Josef Schwan GmbH Dampfraucherzeuger
PL73156Y1 (pl) * 2021-01-29 2023-10-23 Defro Spolka Z Ograniczona Odpowiedzialnoscia Spolka Komandytowa Palnik do kotłów grzewczych z uchylnym rusztem samoczyszczącym
IT202100015035A1 (it) * 2021-06-09 2022-12-09 Laminox S R L Braciere per apparecchiature di riscaldamento a pellet
PL73155Y1 (pl) * 2021-12-17 2023-10-23 Defro Spolka Z Ograniczona Odpowiedzialnoscia Spolka Komandytowa Palnik do kotłów grzewczych z uchylnym rusztem samoczyszczącym

Also Published As

Publication number Publication date
AT514565B1 (de) 2015-02-15
EP2848863A3 (fr) 2015-04-01
AT514565A4 (de) 2015-02-15

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