DE3003459C2 - ANCHORING A FIREPROOF LINING TO THE INSIDE OF THE OVEN HOUSING - Google Patents

Description

act on wide-layer plates, which in turn are affected by the

act on the inside of the wall material: Here

30, the wall material consists of a sequence of heat

The invention relates to anchoring egg-insulating layers, which are shielded from one another

ner feuer est "; Lining on the ceramic fiber board are separated. The inwardly protruding Bol / .enko _P re

The inside of the furnace housing, which with its nuts and preload springs are protected by

TemDeratures over 1000 ° C is operated, enclosed by means of pre-caps.

^ A ^ ^{HOLES in the ceramic fa} " ³⁵ _b ™ s ^ Z ^ Z ^? ^.

"A SÄ e ^ ner such anchoring is known from the 'at temperatures above 1000 ° C. usually ^, I κ : PSί 3909907 Here the prestressing rods are operated about 1600 ⁰ C, such a yield is e ^ erseifs on the sowing wall and on the other hand not possible because both the protective caps as

ρ are exposed in such a way that they are exposed to bending stress even in the cold because they η the

State the ceramic plates are pressed against each other housing wall are firmly anchored and through under

Ceramic plates suitable for this have a 45 different thermal stresses on the side

small modulus of elasticity, a small specific amount can be exerted on these rods

weight and a low thermal conductivity, so that it is also known from DD-PS 26 672 before

Sr d "e lining of a furnace are well suited. To load tension rods with springs to prevent a

However, it has been shown that these ceramic fiber panels are correct compressive stress on the clamped wall

repeated wfrme expansion and contraction to maintain 5 »material. Here I trade

after cooling, a change in their thickness and thus a tension-reinforced ceiling element for industrial furnaces.

Zer dS ünferworfe) IZd. After repeated Ein, which consists of refractory concrete, and Tcmp «rat« «nj» n

There is therefore a risk that the prestressing rods will be exposed to ^{approx. 1000 ° C.} Much higher ten pt

au ^ d "e ceramic fiber plates, which diminish in their thickness, the prestressing rods cannot withstand,

de tmdke ^ e sufficient compression force more 55 that on abutment ^ tt, n on the «nnenseiu, des O ^

can exercise so that gaps are formed in which are welded below, b.ne removal of the preload position

öhemDruci stagnant gas can penetrate, which the '^ ** ™ ** ™ ^^ «™ *

Thermal insulation effect diminished and also on the one hand the ^{rods according to £ r} -J ^ JJ ^

thermal damage, the metallic front can be pulled out, while at the criin

"Nn SfThren can die'ichnur over which the furnace _b o dung provided according anchoring d, c courage

Ceramic fiber plates facing the housing wall can be unscrewed on both sides, so that) dc ^ UD

stretch and are anchored in an abutment, which can be pulled out on both sides

ches consists of ker mischem materia 'and which results from the invention still the special,

Ceramic fiber panels exposed to fire chambers mean that, as a result of the same thread pitch, the rod v "n

ι ⁶ ό5 can be _{unscrewed from the outside.}

The invention is therefore based on the object of a By the features of claim 2 is achieved.

Anchoring for the refractory lining of a sol- that the prestressing would be on the wall ™ * ™haben? L ™

chen furnace to create, in which one side is sure to be guided, so that the through holes of the

Ceramic fiber panels can be chosen to be relatively large and especially a new one Prestressing rod is facilitated.

Embodiments of the invention are shown below described with reference to the drawing. In the drawing shows

F i g. 1 is a partial sectional view of a refractory lining a furnace having a prestressing rod anchored in accordance with the teachings of the invention ;:

2 shows a view corresponding to FIG. 1 of a to modified embodiment of the tension springs.

The furnace housing is lined with ceramic fiber plates 2, which are biased against the metallic wall 1 of the furnace housing. The inside of the Ceramic fiber plates facing the furnace have a higher heat resistance than that of the Wall 1 facing panels.

The ceramic fiber plates 2 are equipped with holes 3, which are aligned with one another and passed through a prestressing rod 4 made of ceramic material is. the corresponding opening in the housing wall 1 enforced. Each prestressing rod is threaded with the same length at both ends Provided slope, so that the prestressing rod can be inserted in any position in the layer composite. On the part of the thread of the prestressing rod 4 protruding over the inner ceramic fiber plate is a Nut 13 screwed on. On the threaded part 4 'de. «Which protrudes outward beyond the housing wall 1 4 another nut is screwed on, against which a spring studio 6 in the form of a washer Is supported between this spring plate 6 and the outer surface of the furnace housing wall 1 prestressing means 5 are provided. These are according to FIG. 1 designed as a compression coil spring 7, which is supported against the housing wall 1 and the spring plate 6, so that the ceramic fiber plates over the prestressing rod 4 2 are subjected to a compressive force.

In the embodiment according to FIG. 2, instead of the compression coil spring, a plate spring T is provided, which is anchored with its outer edge on the housing wall 1 and is supported on the inside on the Fcdertelier supported by the nut.

According to an exemplary embodiment not shown, for guiding the biasing stat / cs 4 a is on the Gchäuscaußenwand 1 fixed tube provided, which through the enlarged diameter holes of the ceramic fiber plates 2, which face the furnace housing, protrudes and for guiding the prestressing rod 4 serves. This pipe can be used to reduce the stress placed on the Prestressing bolt 4 is exerted because the tube bears part of the load of the ceramic fiber plates 2, wherein nevertheless the preload bolt in the holes freely movable towards the inner surface of the housing v / and 1 is. The reason why this pipe only penetrates the ceramic fiber panels facing the wall, is that the movement of the ceramic fiber plates 2, which face the interior of the furnace wall, t> o is facilitated because the gap that is maintained between the preload bolt 4 and the hole 3, smaller than the gap between the prestressing bolt 4 and the pipe, thereby effectively preventing penetration C iüs increased temperaf ur is avoided. ho

The following is an example of embodiment regarding his development and the results that were shown in operation.

Description:

Fig. I.

Effective dimensions

Effective volume of the furnace

Weight of the furnace wall
Material of the prestressing rod

1.45 m (length) 0.85 m (width) 1.45 m (height) 1.8 m ³

7 layers of ceramic fiber boards 33 kg / m * ceramic

Fire conditions: temperature 1300 ° C Atmosphere: Reducing flames. Operating time: 50 h

Results: no Bending of the support bolts kfine Damage to the fibers Wt-ine Housing damage Prestressing rod maintenance and ceramic fa serplates can nen easily replaced will over 250 ares lifespan entrances he waiting

20th

25th

30 From the foregoing description that the present invention avoids the disadvantages of known furnaces, which were covered with ceramic fiber plates. The furnace equipped with ceramic fiber panels according to the invention has a much higher practical value since it allows a longer working time between the individual maintenance work.

For this purpose I sheet drawings

Claims (1)

Gap formation between the ceramic fiber boards as a result Patent claims: thermal dimensional changes also according to length rem operation is avoided. . 1 Anchoring a refractory lining from The task set is solved by the Gcsa.m- Ceramic plates on the inside of the housing 5 heal the characteristics specified in the characterizing part of the patent claim I at temperatures above 1000 ° C. In that d, e pretensioning operations 3 by means of pretensioning rods, which rods made of ceramic material. exist, they can be the temperatures passed through the ceramic fiber plates at the combustion chamber ^ «J« ™ S characterized in that the side of the ceramic plate is exposed and consist of hta-resistant ceramic material, o are from this side also w, e = d From, the gcgcnding door tensioning rods (4) each through a hole (3) overlying Se.te her ^^^ g * "^; ^ over the wall (1) of the furnace housing to the outside and after loosening the inner and / or outer nut ^ uT inwardly protrude over the lining (2), with a simple manner ^ ontjert and replaced by new pretensioning these threaded rods of equal length at both ends the preload constantly under ™ nseite de ^ - AusWenung to fix the Kera- held a predetermined tensile stress and bewirmikfa erplatten ^) a ceramic material ken that the ceramic fiber plates constantly together-L ^ tSe nut (13) open is robbed and are pressed onto the to form a cleavage · is prevented outside of the furnace housing a tension spring (7, T), characterized in that the clamping springs outside the Ofcngcaufgrund miftels a further nut 20 upstream ^^^^^^^^^ ⁸ T Anchoring according to claim 1, characterized accordingly from the usual spring materials that the prestressing rods (4) are provided within.