FR2608659A1 - Chimney block made of insulated refractory concrete - Google Patents

Abstract

The present invention relates to a chimney block made of insulated refractory concrete. Chimney block characterised in that the cavities 3 are filled with an aggregate of cellular glass 4 and are closed at the upper and lower ends by a concrete film 5.

Description

 The present invention relates to the field of flues and relates to a bushel of insulated refractory concrete.

 Currently, in accordance with the standards in force, the smoke pipes must be insulated on their partly cold course, that is to say in the crossing of the attic and on the height of the stump in order to allow a better thermal efficiency and especially d '' avoid bister formation.

 Thus, bushels of terracotta or concrete are generally insulated from the outside by covering with a layer of rock wool or other heat-resistant insulation, this insulating layer being itself surrounded by an outer brick wall provided a plaster and a plaster, or by a galvanized sheet.

The realization of such a smoke pipe insulation is however very long to implement and therefore of a high cost price.

 I1 also exist insulated bushels in terracotta with a double honeycomb envelope intended to ensure thermal insulation by creating peripheral air pockets. However, such an embodiment does not make it possible to obtain satisfactory thermal insulation.

 We also know, moreover, plugged plugs in terracotta, the plugs of which are stuffed with an insulating material, such as rock wool. However, these known bushels have a great brittleness of the insulating layer at the level of their interlocking.

 Good insulation can be obtained by means of double-jacket stainless steel conduits between the envelopes of which a layer of mineral wool is interposed. These known conduits are, however, very expensive.

In addition, bushels have been proposed consisting of an interior refractory pipe surrounded by an insulating sheath of mineral wool, and by a barrier.
in concrete surrounding the whole. In this mode of reality
However, the nesting between the bushels is however
only achievable by fitting the central duct,
and the insulation obtained is random due to the existence
a significant risk of deterioration of the iso layer
lante when mounting the duct.

Finally, there are also known conduits
prefabricated smoke in a single element with a con
inner wall with full walls surrounded by a layer
of insulation, and a concrete casing poured around
all of the above.

Such flues are however
very heavy construction and raise serious problems
handling for their installation.

The object of the present invention is to overcome these
disadvantages.

It has, in fact, for a bushel of refractory concrete having two concentric walls delimiting between them cells, characterized in that the cells are filled with a granulate of glass cel
lular and are closed at their upper ends and
lower by a concrete film.

The invention will be better understood thanks to the description below, which relates to a mode of realization.
preferred reading, given by way of nonlimiting example, and explained with reference to the appended schematic drawing, in which
FIG. 1 is a plan view of a plug in accordance with the invention, and
FIG. 2 is a sectional view of the plug according to FIG. 1.

 According to the invention, and as shown in Figures 1 and 2 of the accompanying drawing, the plug in refractory concrete, which has two concentric walls 1 and 2, which delimit between them cells 3, is characterized in that said cells 3 are filled with a granule of cellular glass 4 and are closed at their upper and lower ends by a concrete film 5.

 The concrete film 5 closing the lower end of the cells 3 is advantageously produced during the molding of the plug, and the film closing the upper end is applied after filling of said cells 3.

 The cellular glass granulate 4 advantageously has a particle size between 2 mm and 4 mm.

 According to another characteristic of the invention, the inner wall 1 has at one end a peripheral nesting recess 6 claiming clearly below the level of the corresponding face of the plug and intended to cooperate with a corresponding opposite end 7 of the inner wall 1 another bushel clearly protruding above the level of its corresponding face (Figure 2). Thus, the grouting of the bushels is effected with offset relative to the joint plane of the cells 3 and of their filling of aggregate 4, so that any thermal bridge, almost inevitable in the other known embodiments, is eliminated.

 Thanks to the invention, it is possible to produce, in a simple manner, bushels insulated in refractory concrete, very robust, and having a high reliability in terms of insulation characteristics.

 Of course, the invention is not limited to the embodiment described and shown in the accompanying schematic drawing. Modifications remain possible, in particular from the point of view of the constitution of the various elements, or by substitution of technical equivalents, without thereby departing from the scope of protection of the invention.

Claims (3)

 1. Bushel in refractory concrete having two concentric walls (1, 2) delimiting between them cells (3), characterized in that the cells (3) are filled with a granular glass granulate (4) and are closed at their upper and lower ends with a concrete film (5).  2. Bushel according to claim 1, characterized in that the cellular glass granulate (4) advantageously has a particle size between 2 mm and 4 mm.  3. Bushel according to claim 1, characterized in that the inner wall (1) has at one end a peripheral nesting recess (6) extending clearly below the level of the corresponding face of the bushel and intended to cooperate with a corresponding opposite end (7) of the inner wall (1) of another plug clearly projecting above the level of its corresponding face.