EP3348903B1 - Grate block - Google Patents
Grate block Download PDFInfo
- Publication number
- EP3348903B1 EP3348903B1 EP18020007.3A EP18020007A EP3348903B1 EP 3348903 B1 EP3348903 B1 EP 3348903B1 EP 18020007 A EP18020007 A EP 18020007A EP 3348903 B1 EP3348903 B1 EP 3348903B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- base element
- head piece
- grate block
- grate
- metal pin
- 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.)
- Active
Links
- 239000002184 metal Substances 0.000 claims description 54
- 238000003466 welding Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 4
- 238000005253 cladding Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 description 24
- 239000000463 material Substances 0.000 description 11
- 239000000446 fuel Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H7/00—Inclined or stepped grates
- F23H7/06—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding
- F23H7/08—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding reciprocating along their axes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H11/00—Travelling-grates
- F23H11/18—Details
- F23H11/28—Replaceable burning-surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H17/00—Details of grates
- F23H17/12—Fire-bars
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H2900/00—Special features of combustion grates
- F23H2900/17002—Detachable or removable worn-out parts
Definitions
- the invention relates to a grate block for a grate of an incineration plant, in particular a waste incineration plant, and to a method for assembling and dismantling a grate block.
- Grate blocks of this type are used in incinerators which have grates for conveying material to be burned through a combustion chamber. Especially in waste incineration plants, the grates are exposed to high thermal and mechanical loads due to the material to be burned.
- the grates are usually formed by rows of grate blocks lying one on top of the other like roof tiles and arranged transversely to the transport direction of the material to be burned.
- the grate blocks in a row are supported on the one hand with a molded foot on a running surface of the grate blocks in the row below and on the other hand on holding tubes attached under the grate blocks.
- grate blocks in a row are usually connected to one another, for example by screw connections. This ensures that a row of grate blocks can be moved synchronously and, for example, individual grate blocks in a row are not lifted off by the material to be burned.
- the high mechanical load is caused by the conveying movement of the grate blocks.
- the high thermal load is due to the composition and properties of the fuel, such as size, weight, calorific value and burning behavior, which are constantly changing. In particular, the high loads on the front end of the grate blocks used, seen in the conveying direction, show their effect through mechanical and thermal wear.
- the proposed two-part grate block should take this into account.
- the EP 0 170 803 A1 discloses a grate block having a replaceable head attached to a support member. It is proposed to provide a detachable fastening of the components on the side of the grate block facing away from the material to be burned. Disadvantage of this version is that the grate block must be accessible from both sides in order to replace the head piece, or the grate block must be lifted out of the grate.
- the DE 75 21 218 U1 also a grate block which is composed of two parts.
- a head piece is pushed in or over onto a base plate from the side, transverse to the direction of transport of the material to be burned.
- the attachment takes place in a form-fitting manner, the two components are designed in such a way that no further attachment is necessary.
- the disadvantage of this design is that lateral insertion of a head piece onto the base plate is only possible when the grate block is in the removed or at least raised state.
- the KR 101 326 481 B discloses a grate block composed of a base member and a plurality of headers.
- the head pieces are screwed together via a connecting rod and inserted into the base element as a unit.
- a disadvantage of the disclosed construction is that the screw connections become soiled or even worn out during operation, so that a single head piece cannot be removed.
- the invention is now based on the object of proposing a grate block which avoids the disadvantages of known designs described above and ensures safe operation of the grate and allows easy replacement of the wearing parts of the grate block when the grate block is installed.
- a grate block is provided with a base element and a head piece arranged on the base element, the base element at least has a projection directed in the direction of the headpiece and at least one support provided for the headpiece to rest on and provided with at least one passage opening.
- the head piece has at least one recess directed towards the base element and at least one passage opening, the projection of the base element and the recess of the head piece being coordinated with one another so that the head piece can be positioned on the base element through their interaction, and the passage opening being in the support of the Basic element and the passage opening of the head piece are arranged concentrically one above the other.
- a metal pin is provided for insertion into the passage openings and to secure the head piece to the base element, the metal pin is welded to the head piece.
- the base element has a holding element for support on the holding tubes and a foot for support on the running surface of the nearest further base element arranged below the base element.
- the projection attached to the base element interacts with the recess present on the head piece in such a way that the head piece assumes a specified position on the base element.
- the projection can be designed as a rib or protuberance of a rib directed towards the head piece. This projection engages in the recess provided on the head piece.
- the recess can be designed as a simple indentation or also as a rib. If the projection and recess are correspondingly shaped ribs, the head piece is positioned only in that direction in which the ribs engage. In cooperation with the supports of the base element on which the head piece rests, it is advantageous if the head piece is positioned in relation to the base element in a vertical direction against the running surface of the grate block.
- the base element is provided with a protuberance against the headpiece shaped in such a way that it engages in a corresponding depression of the headpiece and the headpiece can thereby be positioned in several directions.
- the head piece can advantageously be additionally supported on a foot arranged transversely to the conveying direction of the material to be burned in the base element.
- the concentric arrangement of the through-openings in the support of the base element and in the headpiece makes it possible to insert a metal pin into the through-openings possible.
- the shape of the metal pin corresponds to the shape of the passage openings.
- the geometric shape can be circular or polygonal, for example.
- a projection or recess is arranged at both ends of the base element and the head piece.
- the head piece rests on the base element at three points.
- the base element has two projections and two supports, each provided with a through-opening
- the head piece has two recesses and correspondingly also two through-openings.
- the two projection - recess - connections, as well as the supports of the base element can be provided on the base element and head piece. It has been shown that by using two metal pins to secure the head piece, the maximum possible width of the grate block can be used due to the head piece's own weight.
- the passage openings are rectangular.
- the arrangement of the rectangle is matched to the mechanical stress on the head piece. Since the movement of the grate block in the conveying direction of the kiln over the underlying grate block causes a higher load than in the transverse direction, the long side of the rectangle is directed against the conveying direction of the kiln.
- At least one rib directed opposite to the head piece is provided below the passage opening in the base element.
- the rib can be identical to a rib forming the projection on the base element.
- a plurality of such ribs forming a projection is preferably provided, with at least one rib arranged below the through-opening serving in its shape as a stop for the metal pin inserted into the through-opening. This prevents the metal pin from falling through the passage opening. After the metal pin has been inserted into the through-openings, it is held in the through-openings by the rib.
- the metal pin or the through-opening are shaped in such a way that the metal pin is held in the through-opening when it is inserted into the through-opening.
- the molding is designed in such a way that the metal pin can be knocked out through the passage opening despite the molding when it is subsequently removed.
- a corresponding burr can be formed on the metal pin or the passage opening can be provided with a corresponding narrowing of the cross section, which can also be released by breaking the weld.
- the metal pin can be provided with a fall-through protection.
- the metal pin can, for example, be provided with a welding point before installation, which is integrated into the weld seam when the metal pin is installed.
- a wire or another tool that protrudes beyond the cross section of the metal pin can be welded to the metal pin or attached in some other way.
- the metal pin can be inserted into the passage openings without the metal pin having to be held in its position by the opposite side. This aid is removed again after the metal pin has been assembled or welded to the head piece.
- the dimensions of the metal pin can be matched to the dimensions of the passage openings in such a way that the metal pins can pass through a slight press fit is held in at least one of the passage openings.
- the metal pins have a slightly larger cross section, at least in one direction, than the passage opening. It does not matter whether this is the case with respect to the through-opening in the support of the base element or the through-opening in the head piece.
- the metal pin can be inserted into the passage opening without it having to be held by the opposite side.
- the metal pin is clamped in the passage opening of the head piece. This means that a metal pin of the same type can be used with a new head piece. This would be more difficult if the base element were clamped in the passage opening of the support, since repeated use of the base element would mean that the oversize of the metal pin would have to be gradually increased.
- the passage opening of the head piece has an enlargement on the side opposite the base element, for example in the form of a chamfer.
- Such an enlargement of the cross section creates a groove between the metal pin and the head piece. This improves the subsequent welding of the metal pin to the head piece.
- the head piece must be welded to the metal pin in such a way that the passage opening in the head piece is closed and forms a plane with the surface of the head piece.
- the running surface of the base element is provided with a weld cladding. As a result, the service life of the basic element can be significantly increased.
- the grate block has a width of 150 mm to 600 mm.
- the number of grate blocks in a row that are necessary for equipping the grate can be significantly reduced.
- multiples corresponding to the dimensions of grate blocks commonly used today can be provided for determining the width. For example, with a standard width of 100 mm, grating blocks with 200 mm, 400 mm or 500 mm can be selected. This allows a row of grate blocks to be built within a combustion chamber with as few individual grate blocks as possible.
- the head piece is preferably made in one piece over the entire width of the grate block. This enables the number of metal pins required to be reduced to a minimum.
- the parts of a combustion grate to be replaced should not exceed a maximum weight of 25 kg, otherwise assembly without lifting aids is no longer possible. However, such aids are usually not available in a combustion chamber for revisions. However, since according to the invention only the head piece has to be exchanged as a wearing part, a significantly larger width of an individual grate block can be achieved.
- Air passage openings are provided in the head piece itself. These serve to introduce the necessary combustion air into the fuel and thus into the combustion chamber.
- the number and shape of the air passage openings can be adapted to the needs of the combustion. In the case of a revision, head pieces with differently designed air passage openings can also be used very easily.
- a seal is advantageously provided between the base element and the head piece in the area of the running surface. The seal prevents the combustion air from escaping between the head piece and the base element.
- the seal can be implemented, for example, by inserting a fiberglass cord into a groove provided for this purpose. The groove can be provided in the base element and/or the head piece.
- the proposed design also makes it possible to store the wearing parts for the grate block more cheaply, since storage is limited to the head pieces, which are susceptible to wear, and the metal pins required for securing.
- Ribs can be provided below the passage openings in the base element in such a way that the metal pin cannot fall through the passage opening.
- a fall-through protection can be attached to the metal pin before it is inserted into the passage openings and the fall-through protection can be removed again during or after the welding process. This allows the metal pin to be mounted easily and an additional holder for the metal pin during the welding process is not necessary.
- a simple dismantling of a head piece on a grate block which has been assembled according to the above method is made possible.
- the welding of the metal pin is released with a welding torch and the metal pin is knocked or lifted out of the passage openings.
- a new head piece can then be inserted.
- the basic element of the grate block does not need to be lifted or removed.
- the base does not need to be moved in order to carry out an exchange of the headers. Access to the grate block from multiple sides is not required either to remove the worn headers or to install the new headers. All necessary work can be carried out in the combustion chamber.
- FIG. 1 shows a schematic representation of combustion grate 1 according to the prior art in a longitudinal section.
- the so-called combustion chamber 2 is located above the combustion grate 1.
- material to be burned is placed on the combustion grate 1 (not shown).
- the combustion grate 1 consists of grate blocks 3, 4 arranged one above the other in the manner of a staircase.
- the grate blocks have a running surface 10 and an end face 11 as well as a holding element 8 .
- Each grate block 3.4 is supported on the side facing away from the combustion chamber 2 with the holding element 8 on a holding tube 7 and lies with the end face 11 on the running surface 10 of the downstream grate block 3.4, with the end face 11 being essentially perpendicular to the running surface 10 is arranged.
- Movable grate blocks 4 alternate with fixed grate blocks 3 in the course of the stair-like structure. As a result, every second grate block 4 is moved back and forth over the running surface 10 of the underlying fixed grate block 3 in the direction of movement indicated by the arrow 5 by moving the corresponding holding tube 7 . This causes the material to be burned lying on the combustion grate 1 to be conveyed through the end face 1 in the conveying direction indicated by the arrow 6 over the combustion grate 1 .
- the grate blocks 3.4 are additionally provided with attachments 9, which serve to connect the grate blocks 3.4 lying next to one another in a row. The connection can be made with screws, rods or other fasteners.
- the connection of adjacent grate blocks 3, 4 to a row has the advantage that a whole row of grate blocks 3, 4 can be moved together without the risk that individual grate blocks 3, 4 from the running surface of the underlying grate block 3, 4 take off.
- the proposed grate block 12 consists of a base element 13 and a head piece 12 (see figure 4 ).
- figure 2 shows a schematic representation of an embodiment of a basic element 13 and figure 3 a schematic representation of an embodiment of a head piece 17.
- the base element 13 has a holding element 8, a running surface 10 and one on which the holding element 8 is opposed Arranged end, foot 23 with a sliding surface 24 on.
- the holding element 8 is divided into two holding elements 8 due to the width of the base element 13.
- the foot 23 of the base element 13 is shown as extending over the entire width of the base element 13. However, it is conceivable to design the foot 23 only in partial sections, for example at the ends of the base element 13.
- Fastenings 9 are also provided for connection to a base element 13 arranged in a row. The arrangement of these basic elements makes it possible to replace old grate blocks 3.4 with new grate blocks 12 without changing the basic construction of the combustion grate itself.
- the base element 13 also has two supports 14 for the head piece 17 to rest on.
- the supports 14 are each provided with a rectangular passage opening 15 . Are directed towards the headpiece in figure 2 a total of eight projections 16 shown.
- the number of projections 16 as well as the number of supports 14 can be freely selected.
- the projections 16 are formed onto the ribs 25, with the ribs 23 being supported on the foot 23.
- the head piece 17 has an end face 11 with air passage openings 20 inserted therein. Furthermore, passage openings 18 are provided in the head piece 17 which correspond to the passage openings 15 in the supports 14 of the base element 13 . A corresponding recess 19 is provided on the head piece 17 as a counterpart to the projections 16 in the base element 13 .
- figure 4 shows a schematic representation of a grate block 12 after the basic element 13 has been assembled figure 2 and the head piece 17 after figure 3 .
- the head piece 17 is inserted into the base element 13 on the side opposite the holding element 8 of the base element 13 .
- the head piece 17 is made in one piece over the entire width a of the grate block 12 .
- the width a of the grate block 12 also corresponds to the width of the running surface 10 and the foot 23 of the base element 13.
- the air passage openings 20 provided in the end face 11 of the head piece 17 are shown as an example.
- metal pins 21 embedded which pass through the passage openings of the base element 13 and are welded to the head piece 17.
- FIG figure 5 12 shows a schematic representation of the grate block 12.
- FIG figure 4 in a longitudinal section.
- the base element 13 with its running surface 10, the holding means 8 and the foot 23 extends up to a projection 16 directed towards the head piece 17.
- the projection 16 is formed on a rib 25 which is formed on the foot 23 of the base element 13 forming the sliding surface 23 or is appropriate.
- the projection 16 of the base element 13 interacts with the recess 19 of the head piece 17 and, when the head piece 17 rests on the support 14 of the base element 13, leads to a positioning of the head piece 17 on the base element 13
- the metal pin 21 introduced through the opening of the support 14 of the base element 13 is connected to the head piece 17 by the weld 22 . This means that the head piece 17 on the base element 13 can no longer be displaced by external influences.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Description
Die Erfindung bezieht sich auf einen Rostblock für einen Rost einer Verbrennungsanlage, insbesondere einer Müllverbrennungsanlage, sowie auf ein Verfahren zu Zusammenbau und Demontage eines Rostblockes.The invention relates to a grate block for a grate of an incineration plant, in particular a waste incineration plant, and to a method for assembling and dismantling a grate block.
Derartige Rostblöcke finden Verwendung in Verbrennungsanlagen, welche Roste zur Förderung von Brenngut durch einen Verbrennungsraum aufweisen. Insbesondere in Anlagen zur Verbrennung von Abfall sind die Roste, bedingt durch das Brenngut, einer hohen thermischen und mechanischen Belastung ausgesetzt. Die Roste sind üblicherweise durch dachziegelartig aufeinander liegende, quer zur Transportrichtung des Brenngutes angeordnete, Reihen von Rostblöcken gebildet. Die Rostblöcke einer Reihe stützen sich einerseits mit einem angeformten Fuss auf einer Lauffläche der Rostblöcke der darunter liegenden Reihe und andrerseits auf unter den Rostblöcken angebrachte Halterohre. Mit Hilfe dieser Halterohre werden einzelne Reihen von Rostblöcken bewegt und dadurch das Brenngut mit Hilfe einer über der Lauffläche des nachfolgenden Rostblocks angeordneten Stirnfläche durch den Verbrennungsraum gefördert. Üblicherweise sind die Rostblöcke einer Reihe miteinander verbunden, beispielsweise durch Verschraubungen. Dadurch wird gewährleistet, dass eine Rostblockreihe synchron bewegt werden kann und beispielsweise durch das Brenngut nicht einzelne Rostblöcke einer Reihe abgehoben werden. Die hohe mechanische Belastung entsteht durch die Förderbewegung der Rostblöcke. Die hohe thermische Belastung ist gegeben durch das sich in seiner Zusammensetzung und den Eigenschaften, wie Grösse, Gewicht, Heizwert oder Brennverhalten ständig ändernde Brenngut. Insbesondere zeigen die hohen Belastungen am in Förderrichtung gesehenen vorderen Ende der verwendeten Rostblöcke ihre Wirkung durch einen mechanischen und thermischen Verschleiss.Grate blocks of this type are used in incinerators which have grates for conveying material to be burned through a combustion chamber. Especially in waste incineration plants, the grates are exposed to high thermal and mechanical loads due to the material to be burned. The grates are usually formed by rows of grate blocks lying one on top of the other like roof tiles and arranged transversely to the transport direction of the material to be burned. The grate blocks in a row are supported on the one hand with a molded foot on a running surface of the grate blocks in the row below and on the other hand on holding tubes attached under the grate blocks. With the aid of these holding tubes, individual rows of grate blocks are moved and the material to be burned is thereby conveyed through the combustion chamber with the aid of an end face arranged over the running surface of the following grate block. The grate blocks in a row are usually connected to one another, for example by screw connections. This ensures that a row of grate blocks can be moved synchronously and, for example, individual grate blocks in a row are not lifted off by the material to be burned. The high mechanical load is caused by the conveying movement of the grate blocks. The high thermal load is due to the composition and properties of the fuel, such as size, weight, calorific value and burning behavior, which are constantly changing. In particular, the high loads on the front end of the grate blocks used, seen in the conveying direction, show their effect through mechanical and thermal wear.
Durch den in der
Weiter offenbart die
Die
Die Erfindung liegt nunmehr die Aufgabe zugrunde einen Rostblock vorzuschlagen, welcher die zuvor geschilderten Nachteile bekannter Ausführungen vermeidet und einen sicheren Betrieb des Rostes gewährleistet und einen einfachen Austausch der Verschleissteile des Rostblockes im eingebauten Zustand des Rostblockes ermöglicht.The invention is now based on the object of proposing a grate block which avoids the disadvantages of known designs described above and ensures safe operation of the grate and allows easy replacement of the wearing parts of the grate block when the grate block is installed.
Diese Aufgabe wird dadurch gelöst, indem ein Rostblock mit einem Grundelement und einem an einer Oberseite des Grundelements angeordneten Kopfstück vorgeschlagen wird nach Anspruch 1.This object is achieved in that a grate block with a base element and a head piece arranged on an upper side of the base element is proposed according to
Bei der vorgeschlagenen Lösung ist ein Rostblock mit einem Grundelement und einem am Grundelements angeordneten Kopfstück vorgesehen, wobei das Grundelement zumindest einen in Richtung des Kopfstückes gerichteten Vorsprung und zumindest eine zur Anlage des Kopfstückes vorgesehene und mit zumindest einer Durchtrittsöffnung versehene Auflage aufweist. Das Kopfstück weist zumindest einen zum Grundelement gerichteten Rücksprung und zumindest eine Durchtrittsöffnung auf, wobei der Vorsprung des Grundelements und der Rücksprung des Kopfstückes aufeinander abgestimmt sind, sodass eine Positionierung des Kopfstückes am Grundelement durch deren Zusammenwirken gegeben ist, und wobei die Durchtrittsöffnung in der Auflage des Grundelements und die Durchtrittsöffnung des Kopfstückes konzentrisch übereinander angeordnet sind. Ein Metallstift ist zur Einführung in die Durchtrittsöffnungen vorgesehen und zur Sicherung des Kopfstückes am Grundelement ist der Metallstift mit dem Kopfstück verschweisst.In the proposed solution, a grate block is provided with a base element and a head piece arranged on the base element, the base element at least has a projection directed in the direction of the headpiece and at least one support provided for the headpiece to rest on and provided with at least one passage opening. The head piece has at least one recess directed towards the base element and at least one passage opening, the projection of the base element and the recess of the head piece being coordinated with one another so that the head piece can be positioned on the base element through their interaction, and the passage opening being in the support of the Basic element and the passage opening of the head piece are arranged concentrically one above the other. A metal pin is provided for insertion into the passage openings and to secure the head piece to the base element, the metal pin is welded to the head piece.
Das Grundelement weist ein Haltelement zur Abstützung auf den Halterohren und einen Fuss zur Abstützung auf der Laufläche des nächstliegenden, unterhalb des Grundelements angeordnetes weiteren Grundelements auf. Im zusammengefügten Zustand des Rostblocks wirkt der am Grundelement angebrachte Vorsprung mit dem am Kopfstück vorhanden Rücksprung derart zusammen, dass das Kopfstück am Grundelement eine vorgesehene Position einnimmt. Dabei kann der Vorsprung als eine dem Kopfstück entgegen gerichtete Rippe oder Ausstülpung einer Rippe ausgebildet sein. Dieser Vorsprung greift in den am Kopfstück vorgesehenen Rücksprung ein. Der Rücksprung kann dabei als eine einfache Vertiefung oder ebenfalls als eine Rippe ausgebildet sein. Bestehen Vorsprung und Rücksprung als entsprechend ausgeformte Rippen, ergibt sich eine Positionierung des Kopfstückes nur in derjenigen Richtung, in welcher die Rippen ineinandergreifen. In Zusammenarbeit mit den Auflagen des Grundelements auf welchen das Kopfstück aufliegt, ist es vorteilhaft, wenn die Positionierung des Kopfstückes gegenüber dem Grundelement in senkrechter Richtung gegen die Lauffläche des Rostblocks erfolgt.The base element has a holding element for support on the holding tubes and a foot for support on the running surface of the nearest further base element arranged below the base element. In the assembled state of the grate block, the projection attached to the base element interacts with the recess present on the head piece in such a way that the head piece assumes a specified position on the base element. The projection can be designed as a rib or protuberance of a rib directed towards the head piece. This projection engages in the recess provided on the head piece. The recess can be designed as a simple indentation or also as a rib. If the projection and recess are correspondingly shaped ribs, the head piece is positioned only in that direction in which the ribs engage. In cooperation with the supports of the base element on which the head piece rests, it is advantageous if the head piece is positioned in relation to the base element in a vertical direction against the running surface of the grate block.
Es ist jedoch auch denkbar, dass das Grundelement mit einer derart geformten Ausstülpung gegen das Kopfstück versehen ist, das diese in eine entsprechende Vertiefung des Kopfstückes eingreift und dadurch eine Positionierung des Kopfstückes in mehrere Richtungen erfolgen kann. Durch das Anlegen des Kopfstückes auf den dafür vorgesehenen Auflagen des Grundelementes und das Zusammenwirken von Vorsprung und Rücksprung wird das Kopfstück am Grundelement in einer vorgesehenen Position gehalten bei einer dem Einbauzustand des Rostblocks entsprechenden Lage.However, it is also conceivable that the base element is provided with a protuberance against the headpiece shaped in such a way that it engages in a corresponding depression of the headpiece and the headpiece can thereby be positioned in several directions. By placing the head piece on the supports provided for this purpose on the base element and by the interaction of the projection and recess, the head piece is held in a specified position on the base element in a position corresponding to the installed state of the grate block.
Ebenso kann vorteilhafterweise das Kopfstück auf einem quer zur Förderrichtung des Brennguts im Grundelement angeordneten Fuss zusätzlich abgestützt werden.Likewise, the head piece can advantageously be additionally supported on a foot arranged transversely to the conveying direction of the material to be burned in the base element.
Durch die konzentrische Anordnung der Durchtrittsöffnungen in der Auflage des Grundelements und im Kopfstück wird ein Einsetzen eines Metallstifts in die Durchtrittsöffnungen möglich. Die Form des Metallstiftes ist dabei der Form der Durchtrittsöffnungen entsprechend. Die geometrische Form kann beispielsweise kreisförmig oder vieleckig sein. Nach Einsetzen des Metallstifts wird dieser mit dem Kopfstück verschweisst und somit unverrückbar in den Durchtrittsöffnungen gehalten. Dadurch ist eine Verschiebung oder gar ein Auseinanderfallen der beiden Bauteile des Rostblockes nicht mehr möglich. Ein Vorteil dieser Befestigungsart ist, dass der Zusammenbau oder das Austauschen des Kopfstückes von einer gegen das Brenngut gerichteten Seite möglich ist. Ein Austauschen der Kopfstücke kann demnach im Verbrennungsraum erfolgen. Es besteht keine Notwendigkeit die untereinander in einer Reihe verbundenen Rostblöcke zu trennen. Es ist somit nicht mehr notwendig, ein einmal in den Rost eingebautes Grundelement bewegen oder ausbauen zu müssen.The concentric arrangement of the through-openings in the support of the base element and in the headpiece makes it possible to insert a metal pin into the through-openings possible. The shape of the metal pin corresponds to the shape of the passage openings. The geometric shape can be circular or polygonal, for example. After inserting the metal pin, it is welded to the head piece and thus held immovably in the passage openings. As a result, it is no longer possible for the two components of the grate block to shift or even fall apart. An advantage of this type of attachment is that the assembly or replacement of the head piece is possible from a side facing towards the firing material. The head pieces can therefore be exchanged in the combustion chamber. There is no need to separate the grate blocks connected to each other in a row. It is therefore no longer necessary to move or remove a basic element once it has been installed in the grate.
Vorteilhafterweise sind an beiden Enden des Grundelements und des Kopfstückes jeweils ein Vorsprung respektive Rücksprung angeordnet. In Kombination mit einer mittig vorgesehenen Auflage am Grundelement ergibt sich für das Kopfstück eine Anlage am Grundelement in drei Punkten.Advantageously, a projection or recess is arranged at both ends of the base element and the head piece. In combination with a central support on the base element, the head piece rests on the base element at three points.
Besonders vorteilhaft ist es jedoch, wenn das Grundelement zwei Vorsprünge und zwei mit jeweils einer Durchtrittsöffnung versehene Auflagen und das Kopfstückes zwei Rücksprünge und entsprechend ebenfalls zwei Durchtrittsöffnungen aufweist. Die beiden Vorsprung - Rücksprung - Verbindungen, wie auch die Auflagen des Grundelements können dabei beliebig an Grundelement und Kopfstück vorgesehen sein. Es hat sich gezeigt, dass durch den Einsatz von zwei Metallstiften zur Sicherung des Kopfstückes eine aufgrund des Eigengewichts des Kopfstückes maximal mögliche Breite des Rostblocks genutzt werden kann.However, it is particularly advantageous if the base element has two projections and two supports, each provided with a through-opening, and the head piece has two recesses and correspondingly also two through-openings. The two projection - recess - connections, as well as the supports of the base element can be provided on the base element and head piece. It has been shown that by using two metal pins to secure the head piece, the maximum possible width of the grate block can be used due to the head piece's own weight.
Des Weiteren wird vorgeschlagen, dass die Durchtrittsöffnungen rechteckförmig sind. Die Anordnung des Rechtecks wird dabei auf die mechanische Beanspruchung des Kopfstückes abgestimmt. Da durch die Bewegung des Rostblocks in Förderrichtung des Brenngutes über den darunter liegenden Rostblock eine höhere Belastung als in Querrichtung dazu besteht, ist die Längsseite des Rechtecks entsprechend gegen die Förderrichtung des Brennguts gerichtet.Furthermore, it is proposed that the passage openings are rectangular. The arrangement of the rectangle is matched to the mechanical stress on the head piece. Since the movement of the grate block in the conveying direction of the kiln over the underlying grate block causes a higher load than in the transverse direction, the long side of the rectangle is directed against the conveying direction of the kiln.
Vorteilhafterweise ist zumindest eine dem Kopfstück entgegen gerichtete Rippe unterhalb der Durchtrittsöffnung im Grundelement vorgesehen. Die Rippe kann mit einer den Vorsprung am Grundelement bildenden Rippe identisch sein. Bevorzugterweise ist eine Vielzahl von derartigen einen Vorsprung bildenden Rippen vorgesehen, wobei zumindest eine unterhalb der Durchtrittsöffnung angeordnete Rippe in ihrer Ausformung als ein Anschlag für den in die Durchtrittsöffnung eingeführten Metallstift dient. Dadurch wird verhindert, dass der Metallstift durch die Durchtrittsöffnung hindurchfällt. Nach dem Einführen des Metallstiftes in die Durchtrittsöffnungen wird dieser von der Rippe in den Durchtrittsöffnungen gehalten.Advantageously, at least one rib directed opposite to the head piece is provided below the passage opening in the base element. The rib can be identical to a rib forming the projection on the base element. A plurality of such ribs forming a projection is preferably provided, with at least one rib arranged below the through-opening serving in its shape as a stop for the metal pin inserted into the through-opening. This prevents the metal pin from falling through the passage opening. After the metal pin has been inserted into the through-openings, it is held in the through-openings by the rib.
In einer weiteren Ausführungsform sind der Metallstift oder die Durchtrittsöffnung derart geformt, dass der Metallstift bei dessen Einführung in die Durchtrittsöffnung in der Durchtrittsöffnung gehalten ist. Dabei ist zu berücksichtigen, dass die Anformung so gestaltet wird, dass der Metallstift bei seiner späteren Entfernung trotz der Anformung durch die Durchtrittsöffnung hindurch herausgeschlagen werden kann. Beispielsweise kann an den Metallstift ein entsprechender Grat angeformt oder die Durchtrittöffnung mit einer entsprechenden Querschnittsverengung versehen sein, welche durch Lösen der Schweissung ebenfalls gelöst werden.In a further embodiment, the metal pin or the through-opening are shaped in such a way that the metal pin is held in the through-opening when it is inserted into the through-opening. It must be taken into account here that the molding is designed in such a way that the metal pin can be knocked out through the passage opening despite the molding when it is subsequently removed. For example, a corresponding burr can be formed on the metal pin or the passage opening can be provided with a corresponding narrowing of the cross section, which can also be released by breaking the weld.
Alternativ kann der Metallstift mit einem Durchfallschutz versehen sein. Als Durchfallschutz kann der Metallstift beispielsweise vor dem Einbau mit einem Schweisspunkt versehen werden, welcher bei der Montage des Metallstiftes in die Schweissnaht eingebunden wird. Oder es kann ein Draht oder ein anderes, über den Querschnitt des Metallstifts hinausragendes Hilfsmittel, an den Metallstift geschweisst oder anderweitig befestigt werden. Der Metallstift kann dadurch in die Durchtrittsöffnungen eingefügt werden ohne dass der Metallstift von der Gegenseite in seiner Position gehalten werden muss. Nach der Montage respektive Verschweissung des Metallstifts mit dem Kopfstück wird dieses Hilfsmittel wieder entfernt.Alternatively, the metal pin can be provided with a fall-through protection. To prevent falling through, the metal pin can, for example, be provided with a welding point before installation, which is integrated into the weld seam when the metal pin is installed. Or a wire or another tool that protrudes beyond the cross section of the metal pin can be welded to the metal pin or attached in some other way. As a result, the metal pin can be inserted into the passage openings without the metal pin having to be held in its position by the opposite side. This aid is removed again after the metal pin has been assembled or welded to the head piece.
Weiterhin kann alternativ dazu der Metallstift sind in seinen Abmessungen derart an die Abmessungen der Durchtrittsöffnungen angeglichen sein, dass der Metallstifte durch einen leichten Presssitz in zumindest einer der Durchtrittsöffnungen gehalten ist. Die Metallstifte weisen einen geringfügig grösseren Querschnitt zumindest in einer Richtung als die Durchtrittsöffnung auf. Dabei spielt es keine Rolle, ob dies gegenüber der Durchtrittsöffnung in der Auflage des Grundelement oder der Durchtrittsöffnung im Kopfstück der Fall ist. Der Metallstift kann dadurch in die Durchtrittsöffnung eingefügt werden ohne dass dieser von der Gegenseite gehalten werden muss. Vorteilhafterweise erfolgt die Klemmung des Metallstifts in der Durchtrittsöffnung des Kopfstückes. Dadurch kann bei einem neuen Kopfstück ein gleichartiger Metallstift verwendet werden. Dies wäre bei einer Klemmung in der Durchtrittsöffnung der Auflage des Grundelement erschwert, da durch eine wiederholte Verwendung des Grundelements das Übermass des Metallstifts allmählich erhöht werden müsste.Furthermore, as an alternative to this, the dimensions of the metal pin can be matched to the dimensions of the passage openings in such a way that the metal pins can pass through a slight press fit is held in at least one of the passage openings. The metal pins have a slightly larger cross section, at least in one direction, than the passage opening. It does not matter whether this is the case with respect to the through-opening in the support of the base element or the through-opening in the head piece. As a result, the metal pin can be inserted into the passage opening without it having to be held by the opposite side. Advantageously, the metal pin is clamped in the passage opening of the head piece. This means that a metal pin of the same type can be used with a new head piece. This would be more difficult if the base element were clamped in the passage opening of the support, since repeated use of the base element would mean that the oversize of the metal pin would have to be gradually increased.
Weiterhin ist es vorteilhaft, wenn die Durchtrittsöffnung des Kopfstückes auf der dem Grundelement gegenüberliegenden Seite eine Erweiterung aufweist, beispielsweise in Form einer Anfasung. Durch eine derartige Erweiterung des Querschnitts entsteht zwischen dem Metallstift und dem Kopfstück eine Nute. Dies verbessert die nachfolgende Verschweissung des Metallstiftes mit dem Kopfstück. Die Verschweissung des Kopfstückes mit dem Metallstift hat derart zu erfolgen, dass die Durchtrittsöffnung im Kopfstück verschlossen wird und mit der Oberfläche des Kopfstückes eine Ebene bildet.Furthermore, it is advantageous if the passage opening of the head piece has an enlargement on the side opposite the base element, for example in the form of a chamfer. Such an enlargement of the cross section creates a groove between the metal pin and the head piece. This improves the subsequent welding of the metal pin to the head piece. The head piece must be welded to the metal pin in such a way that the passage opening in the head piece is closed and forms a plane with the surface of the head piece.
Zur Verbesserung des mechanischen und thermischen Verschleissschutzes des Grundelements, ist die Lauffläche des Grundelements mit einer Schweissplattierung versehen. Dadurch kann die Standzeit des Grundelements wesentlich erhöht werden.To improve the mechanical and thermal wear protection of the base element, the running surface of the base element is provided with a weld cladding. As a result, the service life of the basic element can be significantly increased.
Weiter ist es vorteilhaft, wenn der Rostblock eine Breite von 150 mm bis 600 mm aufweist. Dadurch kann die Anzahl der Rostblöcke in einer Reihe, welche für eine Bestückung des Rostes notwendig sind wesentlich verringert werden. Vorteilhafterweise können den heute üblicherweise verwendeten Abmessungen von Rostblöcken entsprechende Vielfache für die Festlegung der Breite vorgesehen werden. Beispielsweise können bei einer Standradbreite von 100 mm Rostblöcke mit 200 mm, 400 mm oder 500 mm gewählt werden. Dadurch kann eine Reihe von Rostblöcken innerhalb eines Verbrennungsraumes mit möglichst wenigen einzelnen Rostblöcken gebaut werden. Bevorzugterweise ist das Kopfstück über die gesamte Breite des Rostblocks einstückig ausgeführt. Dies ermöglicht die Anzahl der notwendigen Metallstifte auf ein Minimum zu reduzieren. Die auszutauschenden Teile eines Verbrennungsrostes sollten ein Maximalgewicht von 25 kg nicht überschreiten, da ansonsten eine Montage ohne Hebehilfsmittel nicht mehr möglich ist. Üblicherweise stehen jedoch derartige Hilfsmittel in einem Verbrennungsraum bei Revisionen nicht zu Verfügung. Da jedoch nach der Erfindung nur das Kopfstück als Verschleissteil auszutauschen ist, kann eine wesentlich grössere Breite eines einzelnen Rostblocks erreicht werden.It is also advantageous if the grate block has a width of 150 mm to 600 mm. As a result, the number of grate blocks in a row that are necessary for equipping the grate can be significantly reduced. Advantageously, multiples corresponding to the dimensions of grate blocks commonly used today can be provided for determining the width. For example, with a standard width of 100 mm, grating blocks with 200 mm, 400 mm or 500 mm can be selected. This allows a row of grate blocks to be built within a combustion chamber with as few individual grate blocks as possible. The head piece is preferably made in one piece over the entire width of the grate block. This enables the number of metal pins required to be reduced to a minimum. The parts of a combustion grate to be replaced should not exceed a maximum weight of 25 kg, otherwise assembly without lifting aids is no longer possible. However, such aids are usually not available in a combustion chamber for revisions. However, since according to the invention only the head piece has to be exchanged as a wearing part, a significantly larger width of an individual grate block can be achieved.
Im Kopfstück selbst sind Luftdurchtrittsöffnungen vorgesehen. Diese dienen dazu, notwendige Verbrennungsluft in das Brenngut und damit in den Verbrennungsraum einzubringen. Die Anzahl und Form der Luftdurchtrittsöffnungen können dabei an die Bedürfnisse der Verbrennung angepasst sein. Auch können bei einer Revision sehr einfach Kopfstücke mit anders angelegten Luftdurchtrittsöffnungen eingesetzt werden. Vorteilhafterweise ist zwischen dem Grundelement und dem Kopfstück im Bereich der Lauffläche eine Dichtung vorgesehen. Durch die Dichtung wird vermieden, dass die Verbrennungsluft zwischen dem Kopfstück und dem Grundelement entweichen kann. Die Dichtung kann beispielsweise durch eine Einlage einer Glasfaserschnur in eine dafür vorgesehene Nut ausgeführt werden. Die Nut kann dabei im Grundelement und / oder dem Kopfstück vorgesehen sein.Air passage openings are provided in the head piece itself. These serve to introduce the necessary combustion air into the fuel and thus into the combustion chamber. The number and shape of the air passage openings can be adapted to the needs of the combustion. In the case of a revision, head pieces with differently designed air passage openings can also be used very easily. A seal is advantageously provided between the base element and the head piece in the area of the running surface. The seal prevents the combustion air from escaping between the head piece and the base element. The seal can be implemented, for example, by inserting a fiberglass cord into a groove provided for this purpose. The groove can be provided in the base element and/or the head piece.
Insgesamt wird durch die vorgeschlagene Konstruktionsweise eine ebenfalls günstigere Lagerhaltung der Verschleissteile für den Rostblock möglich, da sich die Lagerhaltung auf die verschleissanfälligen Kopfstücke und die zur Sicherung notwendigen Metallstifte beschränkt.Overall, the proposed design also makes it possible to store the wearing parts for the grate block more cheaply, since storage is limited to the head pieces, which are susceptible to wear, and the metal pins required for securing.
Ein Zusammenbau eines Rostblockes, welcher ein Grundelement und ein Kopfstück gemäss obiger Beschreibung aufweist, erfolgt mit den folgenden Verfahrensschritten:
- Zusammenfügen von Grundelement und Kopfstück,
- Einführen eines Metallstifts in die Durchtrittsöffnungen
- Verschweissen des Metallstifts mit dem Kopfstück.
- merging of basic element and head piece,
- Insertion of a metal pin into the passage openings
- Welding the metal pin to the head piece.
Dabei können unterhalb der Durchtrittsöffnungen im Grundelement Rippen derart vorgesehen sein, dass der Metallstift nicht durch die Durchtrittsöffnung hindurchfallen kann. Alternativ dazu kann am Metallstift vor dem Einführen in die Durchtrittsöffnungen ein Durchfallschutz angebracht werden und der Durchfallschutz während oder nach dem Schweissvorgang wieder entfernt werden. Dadurch ist eine einfache Montage des Metallstifts möglich und eine zusätzliche Halterung für den Metallstift während des Schweissvorganges ist nicht notwendig.Ribs can be provided below the passage openings in the base element in such a way that the metal pin cannot fall through the passage opening. As an alternative to this, a fall-through protection can be attached to the metal pin before it is inserted into the passage openings and the fall-through protection can be removed again during or after the welding process. This allows the metal pin to be mounted easily and an additional holder for the metal pin during the welding process is not necessary.
Auch wird eine einfache Demontage eines Kopfstückes an einem Rostblock ermöglicht, welcher nach dem obigen Verfahren zusammengefügt wurde. Die Verschweissung des Metallstifts wird mit einem Schweissbrenner gelöst und der Metallstift aus den Durchtrittsöffnungen geschlagen oder herausgehoben. Anschliessend kann ein neues Kopfstück eingesetzt werden. Das Grundelement des Rostblocks ist dabei weder anzuheben noch auszubauen. Das Grundelement braucht zur Durchführung eines Austausches der Kopfstücke nicht bewegt zu werden. Es ist kein Zugang zum Rostblock von mehreren Seiten notwendig, weder zur Entfernung der verschlissenen Kopfstücke noch zur Montage der neuen Kopfstücke. Sämtliche notwendigen Arbeiten können im Verbrennungsraum ausgeführt werden.Also, a simple dismantling of a head piece on a grate block which has been assembled according to the above method is made possible. The welding of the metal pin is released with a welding torch and the metal pin is knocked or lifted out of the passage openings. A new head piece can then be inserted. The basic element of the grate block does not need to be lifted or removed. The base does not need to be moved in order to carry out an exchange of the headers. Access to the grate block from multiple sides is not required either to remove the worn headers or to install the new headers. All necessary work can be carried out in the combustion chamber.
Weitere Vorteile der Erfindung werden in nachfolgenden Ausführungsbeispielen näher aufgezeigt und beschrieben.Further advantages of the invention are shown and described in more detail in the following exemplary embodiments.
Es zeigen
Figur 1- eine schematische Darstellung eines bekannten Verbrennungsrostes
Figur 2- eine schematische Darstellung einer Ausführungsform eines Grundelements
Figur 3- eine schematische Darstellung einer Ausführungsform eines Kopfstückes
Figur 4- eine schematische Darstellung einer Ausführungsform eines Rostblockes nach Zusammenfügen des Grundelementes nach
Figur 2 und des Kopfstückes nachFigur 3 Figur 5- eine schematische Darstellung eines Längsschnittes des Rostblocks nach
Figur 4
- figure 1
- a schematic representation of a known combustion grate
- figure 2
- a schematic representation of an embodiment of a primitive
- figure 3
- a schematic representation of an embodiment of a head piece
- figure 4
- a schematic representation of an embodiment of a grate block after assembling the basic element
figure 2 and the headpiecefigure 3 - figure 5
- a schematic representation of a longitudinal section of the grate block
figure 4
Der nun vorgeschlagene Rostblock 12 besteht aus einem Grundelement 13 und einem Kopfstück 12 (siehe dazu
Weiter weist das Grundelement 13 zwei Auflagen 14 zur Anlage des Kopfstückes 17 auf. Die Auflagen 14 sind mit je einer rechteckigen Durchtrittsöffnung 15 versehen. Zum Kopfstück hin gerichtet sind in
Das Kopfstück 17 weist eine Stirnfläche 11 mit darin eingefügten Luftdurchtrittsöffnungen 20 auf. Weiter sind im Kopfstück 17 Durchtrittsöffnungen 18 vorgesehen, welche mit den Durchtrittsöffnungen 15 in den Auflagen 14 des Grundelementes 13 korrespondieren. Als Gegenstück zu den Vorsprüngen 16 im Grundelement 13 ist am Kopfstück 17 ein korrespondierender Rücksprung 19 vorgesehen.The
- 11
- Verbrennungsrostcombustion grate
- 22
- Verbrennungsraumcombustion chamber
- 33
- Feststehender RostblockFixed grate block
- 44
- Bewegter RostblockMoving rust block
- 55
- Bewegungsrichtungdirection of movement
- 66
- Förderrichtung BrenngutConveying direction of fuel
- 77
- Halterohreholding tubes
- 88th
- Halteelementholding element
- 99
- Befestigungattachment
- 1010
- Laufflächetread
- 1111
- Stirnflächeface
- 1212
- Rostblockgrate block
- 1313
- Grundelementbasic element
- 1414
- Auflageedition
- 1515
- Durchtrittsöffnung in Auflagepassage opening in edition
- 1616
- Vorsprunghead Start
- 1717
- Kopfstückheadpiece
- 1818
- Durchtrittsöffnung im Kopfstückpassage opening in the head piece
- 1919
- Rücksprungreturn
- 2020
- Luftdurchtrittsöffnungenair passage openings
- 2121
- Metallstiftmetal pin
- 2222
- Schweissungweld
- 2323
- Fuss des Grundelementsfoot of the primitive
- 2424
- Gleitflächesliding surface
- 2525
- Ripperib
- aa
- Breite des RostblocksGrate block width
Claims (14)
- A grate block (12) for a grate of an incineration plant- with a base element (13) and- a head piece (17) arranged on the base element (13),wherein the base element (13) having a retaining element (8) for support on retaining tubes (7) and a foot (23) for support on the running surface (10) of the nearest further base element arranged below the base element (13),wherein the base element (13) is provided with- at least one projection (16) directed in the direction of the head piece (17) and- at least one support (14) provided for the abutment of the head piece (17) provided with at least one passage opening (15),and wherein the head piece (17) is provided with- at least one recess (19) directed towards the base element (13) and- at least one passage opening (18),wherein the projection (16) of the base element (13) and the recess (19) of the head piece (17) are matched to one another so that a positioning of the head piece (17) on the base element (13) is given by their interaction, andwherein the passage opening (15) in the support (14) of the base element (13) and the passage opening (18) of the head piece (17) are arranged concentrically one above the other,and wherein a metal pin (21) is provided for insertion into the passage openings (15, 18) and the metal pin (21) is welded to the head piece (17) for securing the head piece (17) to the base element (13).
- The grate block (12) according to claim 1, wherein the base element (13) has two projections (16) and two supports (14) each provided with a passage opening (15) and the head piece (17) has two recesses (19) and two passage openings (18).
- The grate block (12) according to claim 1 or 2, wherein the passage openings (15, 18) are rectangular.
- The grate block (12) according to any one of the preceding claims, wherein the metal pin or pins (21) correspond in shape to the through-openings (15, 18).
- The grate block (12) according to one of the preceding claims, wherein at least one rib (25) directed opposite the head piece (17) is provided below the passage opening (15) in the base element (13).
- The grate block (12) according to one of the preceding claims, wherein the metal pin (21) or the passage openings (15, 18) are formed in such a way that the metal pin (21) is held in the passage openings (15, 18) when it is inserted into the passage openings (15, 18).
- The grate block (12) according to any one of the preceding claims, wherein the metal pin (21) is provided with a fall-through protection.
- The grate block (12) according to one of the preceding claims, wherein the passage opening (18) of the head piece (17) has a widening on the side opposite the base element (13).
- The grate block (12) according to one of the preceding claims, wherein the base element (13) has a running surface (10) and this is provided with a weld cladding.
- The grate block (12) according to one of the preceding claims, wherein the grate block (12) has a width (a) of 150 mm to 600 mm and is made in one piece over the entire width (a).
- The grate block (12) according to one of the preceding claims, wherein air passage openings (20) are provided in the head piece (17).
- The grate block (12) according to one of the preceding claims, wherein a seal is provided between the base element (13) and the head piece (17) in the region of the running surface (10).
- A method of assembling a grate block (12) which has a base element (13) and a head piece (17), wherein the base element (13) having a retaining element (8) for support on retaining tubes (7) and a foot (23) for support on the running surface (10) of the nearest further base element arranged below the base element (13) and at least one projection (16) directed in the direction of the head piece (17) and at least one support (14) provided for bearing against the head piece (17) provided with at least one passage opening (15), wherein the head piece (17) having at least one recess (19) directed towards the base element (13) and at least one passage opening (18), wherein the projection (16) of the base element (13) and the recess (19) of the head piece (17) being matched to one another, so that the head piece (17) is positioned on the base element (13) by their interaction, and wherein the passage opening (15) in the support (14) of the base element (13) and the passage opening (18) of the head piece (17) being arranged concentrically one above the other, with the following method steps:- joining the base element (13) and the head piece (17),- inserting a metal pin (21) into the passage openings (15, 18)- welding the metal pin (21) to the head piece (17).
- A method of dismantling a head piece (17) joined to a grate block (12) in a method according to claim 13, wherein the welding of the metal pin (21) is loosened with a welding torch and the metal pin (21) is knocked or lifted out of the passage openings (15, 18).
Applications Claiming Priority (1)
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CH00041/17A CH713352A1 (en) | 2017-01-12 | 2017-01-12 | Grate block for a grate of an incinerator. |
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EP3348903A1 EP3348903A1 (en) | 2018-07-18 |
EP3348903B1 true EP3348903B1 (en) | 2023-03-15 |
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EP18020007.3A Active EP3348903B1 (en) | 2017-01-12 | 2018-01-08 | Grate block |
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Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US2555108A (en) * | 1947-04-30 | 1951-05-29 | American Eng Co Ltd | Progressive feed stoker |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1013822B (en) * | 1953-08-12 | 1957-08-14 | Keller G M B H | Grate plate for counter moving grate |
CH663266A5 (en) * | 1984-07-05 | 1987-11-30 | Kuepat Ag | ROD ROD FOR COMBUSTION OVENS. |
CN2511880Y (en) * | 2001-12-17 | 2002-09-18 | 北京桑普阳光技术有限公司 | Easily disassembled grate |
WO2007107024A1 (en) * | 2006-03-17 | 2007-09-27 | Doikos Investments Ltd. | Liquid-cooled grill comprising wear plates |
CH703063A1 (en) * | 2010-04-21 | 2011-10-31 | Marco Bachmann | Cladding element for apparatus parts of incinerators. |
GB2483479A (en) * | 2010-09-09 | 2012-03-14 | Tiska Gmbh | Furnace grate bars |
KR101326481B1 (en) * | 2013-09-02 | 2013-11-08 | 주식회사 대경에스코 | A down-ventilated flame incinerator |
CN106196090A (en) * | 2015-05-05 | 2016-12-07 | 荏原环境工程株式会社 | Siege component parts, fire grate and the manufacture method of siege component parts |
-
2017
- 2017-01-12 CH CH00041/17A patent/CH713352A1/en not_active Application Discontinuation
-
2018
- 2018-01-08 EP EP18020007.3A patent/EP3348903B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2555108A (en) * | 1947-04-30 | 1951-05-29 | American Eng Co Ltd | Progressive feed stoker |
Also Published As
Publication number | Publication date |
---|---|
EP3348903A1 (en) | 2018-07-18 |
CH713352A1 (en) | 2018-07-13 |
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