DE102011100369A1 - Modular grate bar, support element, focal element and foot element for it as well as feed grate of a combustion plant - Google Patents

Abstract

The invention relates to a grate bar (1) for a feed grate of an incineration plant, with a focal track section for items to be burned, a front foot section and a rear support section, the grate bar (1) being composed of individual interchangeable elements (2, 3, 4) which are modular are positively and / or non-positively connected. The invention further relates to a support element (2), a focal track element (3) and a foot element (4) for a grate bar (1) and a feed grate of an incinerator, with a plurality of grate bars (1) arranged in steps.

Description

FIELD OF THE INVENTION

The invention relates to a grate bar, a support element, a focal element and a foot element therefor, and a feed grate of a combustion system according to the preamble of claim 1, 7, 8, 9 and 10 respectively.

BACKGROUND OF THE INVENTION

In the from the EP 1 975 507 A1 known feed grate for combustion plants are several step-shaped grate bars arranged in a staircase one above the other. The kiln is displaced by relative movement of the grate bars in the horizontal direction along the grate bar stairs thus formed down. Each grate bar has in the rear area a downwardly extending support part for connection to a holding or driving element for holding or reciprocating the grate bar relative to a vertically adjacent grate bar, in the front area a feed section for advancing the kiln on the vertically below adjacent grate bar and a surface for kiln on. Such grate bars are also from the EP 2 306 086 A2 known.

The known grate bars for feed grates have a number of disadvantages.

So the known grate bars tend to clog air nozzles in the surface with kiln. This causes the air flow is increasingly supplied via adjacent air nozzles to the kiln and burn out these air nozzles. Also between the feed section and the surface trapped Brenngutrückstände can cause high wear. In addition, when a grate bar wear the grate bar must always be replaced as a whole, including often the entire staircase-shaped arrangement is to be dismantled. This leads to long and frequent downtime. Warehousing is also expensive because large grate bars must always be provided. Finally, the known grate bars can not be adapted to special firing conditions and firing.

SUMMARY OF THE INVENTION

The invention is therefore based on the object to provide a grate bar, a support element, a focal element and a foot element and a feed grate of a combustion system according to the preamble of claim 1, 7, 8, 9 and 10, with a simple and cost manufacturability allow for flexible configuration, increased service life and simplified handling, assembly, disassembly and repair.

This object is achieved according to the features of claim 1, 7, 8, 9 and 10, respectively.

Accordingly, a grate bar for a feed grate of a combustion plant, with a focal point section for kiln, a front foot portion and a rear support portion created, which is modularly composed of individual interchangeable elements that are positively and / or non-positively connected.

As a result, the grate bar can be flexibly assembled according to the respective needs from suitable elements, in particular at least three and up to 20, 25 or 30 elements. For signs of wear, breakage and the like only the affected elements must be replaced. This saves costs because less material needs to be replaced. The geometry of the grate bar is flexible changeable and storage is cheaper, since only those elements must be kept that often and / or quickly wear out and / or fail.

The grate bar is preferably made of a support element forming the support section, one or more, in particular 2, 3, 4, 5, 6, 7 or 8 to 10, 15, 20, 25 or 30, the focal-path elements forming the focal-web section and / or a foot section forming the support section Foot element composed. This division has proven to be particularly useful because it has the highest flexibility in the configuration and maximum mechanical stability with best wear resistance.

The support member preferably forms a support surface with a support portion for supporting the grate bar on a support rod or the like for holding or reciprocating, and a connecting portion for connection to the foot portion.

The connecting section can have a rib, preferably two parallel lateral ribs, with a part of a dovetail connection, for example the dovetail recess, and / or a preferably central rib with a recess for a rod-shaped connecting element, which can extend through a corresponding rib of a foot section. This allows easy installation by insertion into the dovetail joint and a simple fixation in this position by screwing or the like.

The foot member may also include a connecting portion for connection to the rest portion and a foot, and one between the connecting portion and the foot have extending connecting rib for a focal section, whereby a simple and quick to produce and releasable connection is created.

The focal track element may have lower side ribs with recesses for a rod-shaped connecting element. Thus, in a simple way, one or possibly more focal element elements with only one rod or the like on the foot element safely and releasably and preferably be attached with play.

The focal element is expediently provided with lateral recesses which form air nozzles of any shape and number. Recesses of adjacent focal element elements can together form air nozzles. Since the focal track elements can be mounted with a distance between the assembly play surfaces and, in the fastened state, can preferably be movable relative to one another in the vertical direction, the air nozzles are self-cleaning. The known from the prior art high wear and burnout is avoided.

The individual elements may each have different mechanical properties such as heat resistance and abrasion resistance and / or be formed from a different material and / or have a different material. This is a flexible adaptation to the particular conditions of the incinerator and the firing material possible and particularly strong or weakly stressed elements can each be optimally designed.

In a feed grate of a combustion system having a plurality of step-like grate bars, the above-mentioned advantages in terms of wear resistance, cost reduction and flexibility.

The invention also provides a support element, a focal element and a foot element for a grate bar, each of which is self-negotiable.

In the case of defects, only the respectively worn elements, in particular the focal point elements, are exchangeable and not more the entire grate bar. A high degree of flexibility in the design including the ability to optimally tune the air flow through exchangeable loose parts, if necessary even after initial assembly, is made possible. The geometry can be changed by exchanging individual elements. The air nozzles always remain free due to the relative movements. Different assembly variants with identical basic elements reduce the storage costs. Due to the individual elements, a more economical production is possible.

Further embodiments and features of the invention will become apparent from the following description, the figures and the claims.

DESCRIPTION OF THE FIGURES

1A . 1B and 1C show a grate bar from different perspectives, taking in 1C individual elements are shown translucently.

2A . 2 B . 2C . 2D and 2E shows a support element in side view, front view, top view, obliquely from above or obliquely from below.

3A . 3B . 3C . 3D and 3E shows a support element in side view, front view, top view, obliquely from above or obliquely from below.

4A . 4B . 4C . 4D and 4E shows a focal point element in side view, front view, top view, obliquely from above or obliquely from below.

5A . 5B . 5C . 5D and 5E shows a further focal element element in side view, front view, top view, obliquely from above or obliquely from below.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The in 1 illustrated grate bar 1 for a feed grate of a combustion plant is made of a support element 2 , Exemplary four focal elements 3 and a foot element 4 composed.

The support element 2 has a surface that may be provided with a sheet-like reinforcing element. Down is a support game 5 provided for connection and / or putting on a Besfestigung and / or a drive mechanism for reciprocating preferably in the surface plane. A swallowtail joint 6 on here two side ribs 7 of the support element 2 as well as on two lateral ribs 8th of the foot element 4 connects the two together. The foot element is secured 4 on the support element 2 through a screw connection 9 or similar.

In the 1C translucent illustrated two middle focal track elements 3 let recognize that the foot element 4 over ribs 8th . 10 the Burning track elements 3 can support. Ribs 10 also have recesses 11 such as aligned holes in which a rod 12 can be pushed in to the focal track elements 3 that also over here pairwise ribs 13 with recesses 11 have to fasten. The pole 12 can end with completion elements 14 be attached as welded washers, preferably a game remains so that the focal elements 3 laterally remain movable by at least 2, 5, 7, 10, 15, 20 mm in particular by the hot air movements due to combustion.

In the surface of the track elements 3 and in particular as shown on the adjacent sides 15 the focal track elements 3 can air nozzles 16 be provided here, for example, oblique and possibly tapered run. The pages 15 but can also be free of air nozzles, cf. 5 ,

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1975507 A1 [0002]
• EP 2306086 A2 [0002]

Claims (10)

Grate bar ( 1 ) for a feed grate of an incinerator, with a focal section for kiln, a front foot section and a rear support section, characterized in that the grate bar ( 1 ) modular from individual interchangeable elements ( 2 . 3 . 4 ) is composed, which are positively and / or non-positively connected to each other. Grate bar according to claim 1, characterized in that a support section forming the support element ( 2 ), a Brennbahnabschnitt at least partially forming Brennbahnelement ( 3 ) and / or a foot element forming the foot section ( 4 ) is provided. Grate bar according to claim 2, characterized in that the support element ( 2 ) a bearing surface with a bearing part ( 5 ) for supporting the grate bar ( 1 ) on a support rod and having a connection portion for connection to the foot portion, wherein the connection portion is a rib ( 7 ) with a part of a dovetail joint ( 6 ) and / or a rib with a recess for a rod-shaped connecting element ( 9 ). Grate bar according to claim 2 or 3, characterized in that the foot element ( 4 ) one a connecting section ( 9 ) for connection to the support section and a foot and a connecting rib extending between the connection section and the foot ( 8th . 10 ) for a focal length portion, the connecting portion forming part of a dovetail joint ( 6 ) and / or a rib ( 9 ) may have with a recess for a rod-shaped connecting element. Grate bar according to one of claims 2 to 4, characterized in that the focal element ( 3 ) lower ribs ( 13 ) with recesses for a rod-shaped connecting element ( 12 ) and / or lateral recesses ( 16 ) having; and / or that a plurality of mutually movable in the fastened state Brennbahnelemente ( 3 ) are provided. Grate bar according to one of claims 1 to 6, characterized in that one of the elements ( 2 . 3 . 4 ) has a different mechanical property and / or is formed from a different material and / or has a different material than another of the elements ( 2 . 3 . 4 ). Support element for a grate bar ( 1 ) according to one of claims 1 to 6. Traction element for a grate bar ( 1 ) according to one of claims 1 to 6. Foot element for a grate bar ( 1 ) according to one of claims 1 to 6. Feed grate of a combustion plant, with several staggered grate bars ( 1 ) according to one of claims 1 to 6.

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