EP2275765B1 - Transportable burner plate shelf - Google Patents

Abstract

Transportable burner plate shelf comprises two longitudinal beams (5) and three cross beams (6), where the cross beams are connected to the longitudinal beams. A plane (3) with four internal drives (2) is laid on the longitudinal beams and/or cross beams to form a support (9). Four hollow columns (8) are arranged as a spacer in middle of long sides (18) and transverse sides (19) on the internal drives. Stabilization tubes are attached through the hollow supports and recesses to form columns. Two triangular plates (7) are provided on top level with holes in corners.

Description

The invention relates to a portable combustor shelf with centrally locked levels, which contains several levels, which are arranged one above the other, wherein central spacers realize the positive locking of the individual plates in a plane.

For burning ceramic products, such as chimney pipes or tiles, porcelain, sanitary ceramics and electroceramic parts such as spark plugs or catalyst supports shelf and transport systems are needed with which the products can be transported in kilns and stored there. The shelving and transport systems consist of so-called kiln furniture, which must be resistant to temperatures above 1000 ° C. The kiln furniture are, for example, pipes, carriers or plates made of ceramic high-performance materials. They are particularly suitable for multiple heating and cooling cycles due to their high thermal shock resistance. The kiln furniture is heated in the kiln together with the kiln. It is therefore desirable that the kiln furniture have a low mass with a high mechanical strength.

There are Brennplattenregale, such as from the DE 34 13 327 C2 known, which consist of several levels and in which the fuel plates are held by means of hollow and connecting columns on horizontal and vertical distance. The combustor shelves are predominantly mounted on solid kiln car plateaus. The positive connection is achieved by mortaring or by pins on the supports, which engage in the bores of the fuel plates. For reasons of strength, these bores have a necessary distance from the edge of the fuel plate and, in conjunction with the outer support contours, lead to settling space losses. With larger rack heights and floor distances, unstable structures occur which are difficult to transport outside of the oven. To avoid these disadvantages, rods are inserted partly into four fuel plate bores and the bores of the hollow and connecting supports. However, the bars provide sufficient stability only up to a limited shelf height.

The disadvantage of existing solutions is that sufficient shelf stability can be achieved only by a high cost of materials of ceramic materials for columns and locking systems. In addition, the frequently used four-point displacement of the plates under clamping conditions at high shelves leads to excessive bending stress of the plate corners. The result is a reduced service life of the plates.

The object of the present invention is to provide a combustor shelf with a high load capacity at a low mass, which is stable during transport and during the firing process and has little placement space losses.

The object of the present invention is achieved by a portable combustor shelf with centrally locked levels according to claim 1. Preferred embodiments will become apparent from the dependent claims. The use of the portable combustor shelf is evident from further claims.

The above drawbacks are overcome by using rectangular burners having recesses in only one corner and recesses on two further sides. The recesses form between two adjacent plates a space in which vertical stabilization tubes can be introduced. At the same time, the stabilizing tubes guide the hollow supports designed as spacers. The hollow columns are in contrast to the known solutions in the intermediate space of the fuel plates and allow the maximum setting space.

With preferably four burners per level, a centrally located mold support takes over the fixation of the four burners from two adjacent levels. The mold supports have on the top and bottom of each four protruding knobs, which engage in the Brennplattenbohrungen and hold at a fixed distance. A centrally inserted pipe contributes to further stabilization. This is advantageous because the plate shelves are transported with trucks outside the kiln without the car and must survive emergency braking of the vehicle without damage. The transfer of loads from the lowest level on the forks of the material handling equipment take three bars in the top holes the stabilizing tubes are fixed to the bottom side. The head-side locking of the stabilizing tubes take over two triangular plates.

To further reduce the Brennhilfsmittelmasse, it is alternatively possible to replace the hollow columns by concentric cast on the stabilizing tubes transverse ribs. Thus, the fuel plates at the outer corners in the region of the recesses are only free, resulting in particular in the fuel plates of the lower levels in the shelf structure to a significant reduction of the clamping moments.

The firing rack according to the invention for firing ceramic products has a central displacement and fixation of the firing plates by mold supports, which engage positively by means of protruding nubs in the bores of the fuel plates of two levels and are arranged one above the other like a spine.

The firing rack according to the invention has a stabilizing tube, which is inserted in the vertical clearance formed by the mold supports and the inner corners of the firing plates and is fixed to the bottom in a bore of a supporting beam.

The combustor according to the invention comprises burners having a bore in a plate corner and a plurality of recesses at the outer edges in the corner, which form the space for one or more stabilizing tubes in adjacent plates.

The firing rack according to the invention has stabilizing tubes which form the guide for the hollow columns serving as spacers and thus each firing plate is thus displaced only at three locations.

According to the invention, the stabilizing tubes may alternatively have concentric transverse ribs whose spacing corresponds to the vertical plate spacing and which serve directly as a support for the burners in the region of the recesses.

The elements of the device such as burners, moldings, tubes and beams preferably contain high temperature resistant ceramic materials, more preferably silicon carbide and in particular nitride bonded silicon carbide (NSiC) or synthetic sintered mullite.

Nitride-bonded silicon carbide is nitrided from silicon carbide granules and silicon metal powder in a nitride atmosphere at about 1400 ° C and then oxidized. Workpieces made of nitride-bonded silicon carbide are poorly wettable by non-ferrous metal melts. Workpieces made of nitride bonded silicon carbide have a high dimensional and surface resistance as well as a high bending strength. Due to their high temperature resistance, workpieces made of nitride bonded silicon carbide are outstandingly suitable as kiln furniture for temperatures up to 1500 ° C.

Mullite contains alumina and silica. Synthetically sintered mullite has a relatively high strength with a relatively low thermal expansion, resulting in an excellent thermal shock resistance results. It is suitable as kiln furniture for temperatures up to about 1700 ° C.

The invention further includes the use of the portable combustor shelf according to the invention for transporting and / or storing ceramic products before, during and / or after the firing process.

The transportable combustor shelf according to the invention is preferably used for firing building ceramics, in particular roofing tiles, bricks, split tiles, chimney pipes or tiles, of ceramic systems in vehicle technology, in particular of spark plugs, lambda probes, catalysts, antilock braking systems, electronic stability programs and diesel particulate filters, of nozzles, in particular of Spray nozzles, eccentric nozzles, helix nozzles, spiral nozzles and Tangentialdüsen, for example, for use in flue gas desulphurisation systems, linings, Ofengleitbahnen, plates, supports, in particular for plant construction, furnace construction, pump construction, forming technology and wear protection technology, of electrically insulating components, in particular Ferrites, insulators, varistors and capacitors, as well as grinding balls and grinding wheels, of powdery materials such as fluorescent and fluorescent substances, sliding plates, ceramic shells, push plates and square corners pseln.

• Figur 1 eine räumliche Darstellung des Brennplattenregals,
• Figur 2 eine Draufsicht auf die Längsseite des Brennplattenregals,
• Figur 3 eine Draufsicht auf die Querseite des Brennplattenregals,
• Figur 4 eine Draufsicht auf das Brennplattenregal von oben,
• Figur 4A eine vergrößerte Darstellung des Ausschnitts C aus Figur 4,
• Figur 5 eine räumliche Darstellung einer Brennplatte,
• Figur 6 eine räumliche Darstellung einer Formstütze,
• Figur 7 eine Seitenansicht einer Hohlstütze,
• Figur 7A eine Draufsicht auf die Hohlstütze aus Figur 8 von oben,
• Figur 8 eine räumliche Darstellung eines Stabilisierungsrohrs,
• Figur 9 eine räumliche Darstellung eines Bolzens und
• Figur 10 eine räumliche Darstellung einer Dreiecksplatte.

The invention will be explained in more detail with reference to a drawing and an example. The drawing is not completely true to scale. The invention is not limited by the drawing in any way. Show it:

• FIG. 1 a spatial representation of the fuel rack shelf,
• FIG. 2 a plan view of the longitudinal side of the combustor shelf,
• FIG. 3 a plan view of the transverse side of the combustor shelf,
• FIG. 4 a top view of the Brennplattenregal from above,
• FIG. 4A an enlarged view of the section C from FIG. 4 .
• FIG. 5 a spatial representation of a burning plate,
• FIG. 6 a spatial representation of a mold support,
• FIG. 7 a side view of a hollow support,
• FIG. 7A a plan view of the hollow support FIG. 8 from above,
• FIG. 8 a spatial representation of a stabilization tube,
• FIG. 9 a spatial representation of a bolt and
• FIG. 10 a spatial representation of a triangle plate.

FIG. 1 shows a spatial representation of an exemplary embodiment of a combustor shelf (1) according to the invention. FIG. 2 shows a plan view of the longitudinal side (18) of the combustor shelf (1) FIG. 1 . FIG. 3 shows a plan view of the transverse side (19) and FIG. 4 a top view on the top.

For example, the combustor shelf (1) has nine levels (3) each with four burners (2) per level (3). A plane (3) of four fuel plates (2) has, for example, a length a of 1220 mm and a width b of 900 mm.

The combustor shelf (1) stands on four feet (4) on a substructure (12). The substructure (12) may be a carriage. The feet (4) are connected to two longitudinal beams (5). The longitudinal beams (5) are connected to three transverse beams (6), wherein the transverse beams (6) are arranged orthogonal to the longitudinal beams (5). The three crossbars (6) take over the transfer of loads from the lowest plate layer on the forks of a material handling device, for example during transport of the fuel plate shelf (1) in the kiln. The crossbars (6) are, for example, 80 mm high, 60 mm wide and 920 mm long. In the tops of the crossbars (6) are holes in which stabilizing tubes (10) are fixed to the bottom side.

FIG. 5 shows a spatial representation of a single burner plate (2). The firing plate (2) is, for example, 530 mm long, 440 mm wide and 7 mm thick. The burner plate (2) has a bore (13) with a diameter of, for example, 20 mm. The bore (13) serves to receive a nub (16) of a mold support (9). In addition, the combustion plate (2) has two recesses (14) on the outer edges in the corner region. In this example, four fuel plates (2) are arranged in a plane, wherein two recesses (14) of adjacent fuel plates (2) are arranged side by side.

FIG. 6 shows a three-dimensional view of a mold support (9), each with four protruding knobs (16) on the top and the bottom of the mold support (9). The mold support (9) is for example 120 mm long and has an approximately square base with an edge length of 88 mm. The inner surface of the mold support (9) is designed so that a stabilizing tube (10) can be passed therethrough.

The four fuel plates (2) of each plane (3) are each fixed by a centrally arranged mold support (9). The knobs (16) of the mold support (9) engage in the bore (13) each have a combustion plate (2) and keep the fuel plates (2) on a fixed horizontal distance.

FIG. 7 shows a side view of a hollow support (8), FIG. 7A a view of a hollow support (8) from above. The hollow support (8) has, for example, a length h of 120 mm, an outer diameter d ₁ of 80 mm and a wall thickness s of 20 mm. The inner diameter d _{2 of} the hollow support (8) results from the outer diameter d ₁ minus twice the wall thickness. The inner diameter d ₂ is here for example 40 mm. The inner diameter d _{2 of} the hollow support (8) is dimensioned such that a stabilizing tube (10) can be guided through the hollow support.

FIG. 8 shows a spatial representation of a stabilizing tube (10). The stabilizing tube (10) is for example 1200 mm long and has an outer diameter of 38 mm. The stabilization tube (10) has at one end a bore (17) with a diameter of, for example, 18 mm. In the installed position, the bore (17) is located in the stabilizing tube (10) at the top of the combustor shelf (1).

The combustor shelf (1) has five vertically guided stabilizer tubes (10). A central stabilizing tube (10) is arranged in the middle between each four burning plates (2) of a plane (3). Two stabilizing tubes (10) are located in the middle of the longitudinal side (18) of the combustor shelf (1) and two more in the middle of the transverse side (19).

Two levels (3) of burners (2) are each held by a centrally arranged mold support (9) and four hollow supports (8) at a vertical distance of, for example, 120 mm. The mold support (9) and the hollow supports (8) are lined up on the stabilizing tubes (10) and fixed in their lateral position.

The recesses (14) of the fuel plates (2) are designed so that two adjacent recesses (14) of two form-fitting juxtaposed fuel plates (2) enclose a stabilizing tube (10).

FIG. 9 shows a spatial representation of a bolt (11). The bolt (11) is for example 80 mm long and has a diameter of 16 mm. One bolt each (11) is inserted into a bore (17) of a stabilizing tube (10) and thus locks the stabilizing tube (10) at its upper end.

FIG. 10 shows a spatial representation of a triangular plate (7). The triangular plate (7) has a bore (13) with a diameter of, for example, 20 mm. The bore (13) serves to receive a nub (16) of the uppermost form support (9) of the fuel plate stack. In addition, the triangular plate (7) has two bores (15) with a diameter of, for example, 42 mm each. The bore (15) serves in each case for carrying out a stabilizing tube (10).

In the illustrated embodiment FIG. 1 two triangular plates (7) are arranged on the upper side of the combustor shelf (1) and are locked to a respective bolt (11) on each stabilizing tube (10). The triangular plates (7) serve to stabilize and cross-brace the fuel plate stack.

The elements of the combustor shelf (1) are made of high temperature resistant ceramic materials. The feet (4), the longitudinal beams (5), the crossbar (6), the bolts (11) and the stabilizing tubes (10) contain, for example, nitride-bonded silicon carbide as the material Advancer of the company Saint-Gobain IndustrieKeramik Rödental, Germany, with a content of silicon carbide of about 68%. The fuel plates (2), the triangular plates (7) and the mold supports (9) contain, for example, nitride-bonded silicon carbide such as the material AnnaSicon RTH from Saint-Gobain IndustrieKeramik Rödental, Germany with a content of silicon carbide of about 66%. The hollow columns (8) contain, for example, synthetic mullite such as the material AnnaMullit 70 from Saint-Gobain IndustrieKeramik Rödental, Germany with an aluminum oxide content of about 75%.

LIST OF REFERENCE NUMBERS

(1)

Burning plate shelf

(2)

burning plate

(3)

level

(4)

foot

(5)

stringers

(6)

crossbeam

(7)

triangle plate

(8th)

hollow support

(9)

form support

(10)

stabilization tube

(11)

bolt

(12)

substructure

(13)

Bore for receiving (16)

(14)

recess

(15)

Bore for receiving (10)

(16)

burl

(17)

Bore for receiving (11)

(18)

Longitudinal side of (1)

(19)

Transverse side of (1)

a

Length of the burner plate level

b

Width of the burner plate level

H

Length of (10)

d ₁

Outer diameter of (8)

d ₂

Inner diameter of (8)

s

Wall thickness of (8)

Claims (12)

1. Transportable burner plate shelf for firing ceramic products, comprising

   - at least two longitudinal beams (5) and at least three cross beams (6) that are connected to the longitudinal beams (5),

   - a plane (3) with at least four burner plates (2) lying on the longitudinal beams (5) and/or cross beams (6) and attached to a shaped support (9) located in the center, wherein the shaped support (9) has on the top and on the bottom at least four protruding knobs (16) by which the burner plates (2) are connected through holes (13) to the shaped supports (9),

   - at least four hollow supports (8) that are arranged on the burner plates (2) as a spacer on the edge in the middle of the long sides (18) and transverse sides (19),

   - thereon, at least one additional plane (3) of at least four burner plates (2) with shaped supports (9) and hollow supports (8),

   - stabilization tubes (10) that run through the hollow supports (8) and recesses (14) on the outer edges in the corner region of the burner plates (2) and through the shape supports (9) and are attached through holes to the longitudinal beams (5) and/or cross beams (6),

   - the stabilization tube (10) that is introduced into the vertical free space formed by the shaped supports (9) and the inner corners of the burner plates (2) has a hole (17) to accommodate a pin (11) and the pin (11) introduced into the hole (17) locks the stabilization tube (10) on its upper end, and

   - on the top plane (3) at least two triangular plates (7) with holes (13) and (15) in the corners that connect two adjacent hollow supports (8) and the shaped support (9) to each other.
2. Transportable burner plate shelf according to claim 1, wherein stabilization tubes (10) form the guide for hollow supports (8) and shaped supports (9), and each burner plate (2) is attached at only three points.
3. Transportable burner plate shelf according to one of claims 1 through 2, wherein the shaped supports (9) engage positively by means of protruding knobs (16) into the holes (13) of the burner plates (2) of two planes (3) and are arranged one above another.
4. Transportable burner plate shelf according to one of claims 1 through 3, wherein the burner plates (2) have a hole (13) in one corner of the plate and at least two recesses (14) on the outer edges in the corner region, which form, in the case of adjacent burner plates (2), the free space for one or a plurality of stabilization tubes (10).
5. Transportable burner plate shelf according to one of claims 1 through 4, wherein the burner plate shelf (1) stands on at least four feet (4).
6. Transportable burner plate shelf according to one of claims 1 through 5, wherein the burner plate shelf (1) stands on at least four feet (4) on a substructure (12).
7. Transportable burner plate shelf according to one of claims 1 through 6, wherein the burner plates (2), longitudinal beams (5), cross beams (6), triangular plates (7), hollow supports (8), shaped supports (9), stabilization tubes (10), and pins (11) contain silicon carbide, nitride bonded silicon carbide (NSiC), synthetic sintered mullite, or mixtures thereof.
8. Transportable burner plate shelf according to one of claims 1 through 7, wherein the stabilization tubes (10) have concentric cross ribs, whose spacing corresponds to the vertical spacing of the burner plates (2) and which serve directly as support for the burner plates (2) in the region of the recesses.
9. Transportable burner plate shelf according to one of claims 1 through 8, wherein the length of the burner plates (2) is from 50 mm to 1000 mm, preferably from 500 mm to 550 mm, the width is from 50 mm through 1000 mm, preferably from 400 mm to 450 mm, and the thickness is from 4 mm to 20 mm, preferably from 5 mm to 10 mm.
10. Transportable burner plate shelf according to one of claims 1 through 9, wherein the length (h) of the hollow support (8) is from 30 mm to 300 mm, preferably from 100 mm to 140 mm, the outside diameter (d1) is from 20 mm to 200 mm, preferably from 70 mm to 90 mm, and the wall thickness (s) is from 4 mm to 25 mm.
11. Transportable burner plate shelf according to one of claims 1 through 10, wherein preferably five to seven planes (3) are arranged one above another.
12. Use of a transportable burner plate shelf according to one of claims 1 through 11 for firing ceramic products, such as chimney pipes or roof tiles, porcelain, sanitary ceramics as well as electro ceramics such as spark plugs or catalyst carriers.

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