FR2792352A3 - CHIMNEY BRICK - Google Patents

Abstract

Said brick (1) is provided with a supporting outer casing (2), and an insulation (7) housed in an inner opening (3) of the outer casing. A passage opening (5), passing through the brick (1) in its center and intended for a flue gas pipe, is formed by an inner lining part (4) made of the material of the outer casing (2). , the insulation (7) being interposed between said part (4) and said envelope (2).

Description

CHIMNEY BRICK

  The present invention relates to a chimney brick comprising an outer load-bearing envelope having a peripheral wall,

  - insulation housed in the interior opening of the

outer velvet, and

  - a passage opening crossing the brick in its center

  and intended for a flue gas pipe.

  We know of chimney bricks of this kind, which

  include a load-bearing outer shell and insulation

  tion placed in the interior opening of said envelope.

  There is provided in the vertical direction, in the center of this insulation, a passage opening traversed by the pipe to

  flue gases from a combustion plant when more

  several bricks are superimposed to form a chimney

building.

  Recently, due to the notorious problem

  in the field under consideration, the aforementioned insulation is provided

  increasingly, no longer in iso-

  lants based on mineral fibers, but in light mineral concretes which consist of a binder and an adjuvant

  light thermally insulating, or are made porous.

  However, to create the central opening for the passage of the flue gas pipe, during the pouring of the insulation in such light concrete, a forming bush is introduced concentrically into the outer casing, during the manufacturing process. then the slip space is

  filled with lightweight concrete subjected to foaming. After hard-

  curing of the mass spilled under the consistency of a slurry, the inner forming or shuttering sleeve

  can be removed and reused.

  A disadvantage affecting this process and, as such, the exposed chimney bricks conforming to the state

  on the one hand, lies in the fact that the pro-

  manufacturing process is complex, due to the

  formwork he claims. In addition, the total manufacturing time

  full cation of a brick is unnecessarily long, because

  from the waiting time to the removal of the cof-

  frage after setting the insulation.

  Finally, concerning the structural arrangement of the brick-

  that proper, as commented, it should be noted that only the outer envelope has a

  static support. The insulation is, by itself, direct-

  bordering the interior opening. This also raises the problem that the insulation material, which is generally vulnerable and less stable, can be damaged, in particular when inserting the flue gas pipe or when moving stacks of bricks. jacketing, using a forklift, under the action

forks.

  Based on the problem presented, the invention

  tion relates to an improved chimney brick of

  in such a way that it can be produced at the cost of less

  dre technical complexity of manufacturing while being, however, mechanically and statically more stable than

bricks according to the prior art.

  According to the invention, this object is achieved by the fact that

  - the passage opening is formed by a part of the che

  interior bet constituted by the material of the envelope

  outer loppe, the insulation being interposed between the-

  said inner liner part and said outer casing. As a result, the passage opening is formed not

  not by insulation, but by a part of internal lining

  which is made of the material of the outer casing

  higher, the insulation between said part and the

  said envelope. The crucial aspect of the invention resides in the mentioned inner lining part which, on the one hand,

  forms a mechanically invulnerable boundary surface compared to

  port at the passage opening for the gas pipe

  mées, and materialized by said part. On the other hand, it represents a statically operating part which increases the

  brick stability. Finally, the inner lining part

  Laughter also offers a considerable advantage during the manufacturing process, since it acts practically as

  "lost formwork" for consistent insulation, eg

  ple, in a lightweight concrete material suitable for casting. The invention will now be described in more detail, by way of non-limiting examples, with reference to the appended drawings in which: FIG. 1 is a perspective illustration of a chimney brick according to a first embodiment; Figure 2 is a perspective representation

  of such a brick according to a second embodiment

  tion; Figure 3 is a vertical section of a brick according to the two embodiments, along the respective section line III-III of Figure 1 or 2; Figure 4 is a vertical section of a chimney brick according to a third embodiment; and Figures 5A to 5F are schematic views of a

  production device for brick according to the fi-

  gure 4, by intermediate stages of manufacturing follow one another

yielding to each other.

  A chimney brick 1 illustrated in FIG. 1 consists of an outer casing 2 of configuration

  external parallelepiped, which surrounds an internal opening

  higher 3 vertically uninterrupted, similarly

  mostly elepipedic. This interior opening

  accommodates a part of inner lining 4 of prismatic form

  that made of a concrete type material with a

  static port, just like the outer casing 2. The

  part 4 surrounds a passage opening 5 extending ver-

  tically, crossing the brick in its center and intended

  to the flue gas pipe of a combustion plant.

  The two aforementioned parts of the brick are connected to each other by means of frames 6 formed, in one piece, with the internal face of the outer casing

  2 and the external face of part 4. The frames 6 fran-

  shear insulation 7 consisting of lightweight concrete

  roughness of minerals shot in the example illustrated in Figure 1, having been poured into the intermediate space between the outer casing 2 and the part 4, in which it has hardened. In this exemplary embodiment, the insulation 7 therefore forms an insulating intermediate layer 8 which, as a result of the casting process and the setting of the concrete material

  light, is intimately linked to the boundary surfaces of the envelope

  outer louver 2 and part 4.

  As further illustrated by dotted lines, in FIG. 1, the number of members 6 can vary depending on

  static requirements imposed on the link between the

  inner liner tie 4 and outer casing 2. As a light concrete type material, for example, a relatively good flowable mixture is used, consisting of

  a laitance of cement containing a granulate of blown glass

  flé as a thermally insulating light additive. The dry bulk density of this material is located in

  the range of 200 kg / m3 to 400 kg / m3. Furthermore, it is also

  It is also possible to use light porous concrete,

  porous concrete with light admixture, or even amalgams with po-

  roughness of mined ores, containing a matrix of binder

subject or not subject to foaming.

  Whereas, in the embodiment illustrated in FIG. 1, the interior lining part 4 offers, in plan, an exterior contour with a polygonal outline, a portion of

  inner liner 4 'is designed as a cylindrical sleeve

  drique in the example of realization of a brick of chemi-

  born 1 'shown in Figure 2. Said socket is de-

  provided with connection by members with respect to an envelope

  exterior 2 '. The connection is ensured only by the ma-

  light concrete type material with 7 'insulation materializing,

  here again, an insulating interlayer 8 'between the part

  tie 4 'and the outer casing 2'. Since a certain compaction pressure

  is necessary for spilling light concrete material

  ger, outer envelopes 2, 2 'and parts of the che

  inner bet 4, 4 'hardened are used in

  measurements according to FIGS. 1 and 2.

  Another alternative embodiment of a 1 '' chimney brick is shown in Figure 4. The illustrated structure allows a largely simplified and rational production, as explained in more detail below with regard to

Figures 5A to 5F.

  Regarding the structural arrangement in accordance with

  gure 4, we note that a parallel outer envelope

  2 '' lepipedic and a cylindrical part of the inner jacket

  laughing 4 '' are connected to each other by a bottom ring

  9 closing, at the bottom, an insulation space 10 between the

  said outer shell 2 '' and said part 4 ''. So,

  the space 10 is almost made as an annular trough.

  Additional members, similar to the shape of

  reading according to figure 1, can be provided between the

part 4 '' and envelope 2 ''.

  The configuration of the insulation space 10 into a trough, as mentioned, offers the possibility of using, as insulation 7 '', not a material undergoing a setting, but a loose filling 11 in one blown glass granulate. To prevent a fall of the aggregate particles, also during the overturning of the 1 '' brick, the space 10 is closed by a cover 12. The latter consists of a sprayed layer of a mineral binder, such as for example a laitance of cement which binds, after hardening, to

  edges of the 2 '' outer casing and the cheek piece

  interior bet 4 '', which also binds the particles of

  aggregate located highest in the lining 11.

  It should be explained, in support of FIGS. 5A to F, the process for producing the 1 '' brick in accordance with

figure 4.

  - The starting position is illustrated in FIG. 5A, on which a pre-prepared blank, composed of the outer casing 2 '', the bottom ring 9 and the part of

  4 '' inner liner, stands on a support

  mage 13. A forming plate 14 is then lowered onto

the draft.

  - A filling trolley 15 open at the bottom, filled with a blown glass granulate 16, then performs a

  back and forth on the forming plate 14. Via

  diary of filling orifices 17 made in said

  tray 14, the aggregate 16 spreads in the space of iso-

  lation 10 and fills it. Because the aggregate 16

  flows well and is very light, hardly any pressure

  filling is not developing in the region of the es

  pace 10 during the filling process. In this way, the lining 11 can also be poured in the raw state of the blank, which makes it possible to eliminate long

  periods of hardening of said blank before penetration

  tration of said lining. This contributes significantly to the

  rationalization of the production process.

  - As evidenced by an observation in Figure 5C, the space

  insulation 10 and the filling holes 17 above-

  adjacent, formed in the forming plate 14, are

fully filled.

  - At the successive stage, the forming plate 14 is released

  upward as shown in Figure 5D. An excess

  blown glass aggregate tooth 16 then remains on

1 '' brick.

  - This excess material is swept away by a cylinder of

  scan 18, moved above and along the upper face

  1 '' brick (Figure 5E).

  - As shown in Figure 5F, spray nozzles

  trices 19 spray from top to bottom, on the opening of the annular insulation space 10, a laitance of cement forming, after hardening, the cover 12 assigned to the lining 11. A runoff of said lining 11, out of the space 10, is therefore prohibited by

  the bottom ring 9 on the underside, and by the neck

circle 12 on the upper face.

  Finally, it should be noted that it is also

  possible to use directly, instead of the cart

  pleating, a silo which is intended for the material flowing from

  lining 11 and the discharge opening of which rests directly

  above the forming plate 14, or even respective-

  lie on the latter. It then only remains to have, between said plate and the discharge orifice, a sliding plate acting as an occupying shutter slide

  an open position during the filling process.

  Finally, instead of filling with a blown glass aggregate, it is also possible to use perlite, vermiculite or other flowable materials

thermally insulating.

  It goes without saying that many modifications can

  be made to the chimney brick described and represented

  without departing from the scope of the invention.

Claims (7)

-R E V E N D I C A T I ONS - 1. Chimney brick including   - a load-bearing outer envelope (2; 2 '; 2' ') presented both a peripheral wall,   - insulation (7; 7 '; 7' ') housed in the internal opening   lower (3) of the outer casing (2; 2 '; 2' '), and - a passage opening (5) passing through the brick in its center and intended for a flue gas pipe, brick characterized by the fact that - the passage opening (5) is formed by a part of   inner liner (4; 4 '; 4' ') made up of the ma-   outer shell material (2; 2 '; 2' '), the insulation-   tion (7; 7 '; 7' ') being interposed between said inner liner part and said outer casing (2; 2 '; 2' ').   2. Brick according to claim 1, characterized in that the interior lining part (4; 4 ') is connected to the exterior envelope (2; 2') by means of an insulating interlayer (8; 8 ') consisting of lightweight concrete.   3. Brick according to claim 1 or 2, characterized in that the inner lining part (4 ') and the outer casing (2') are connected to each other by members (6) which form body with them, and cross insulation (7 ').   4. Brick according to any one of claims 1   to 3, characterized in that the lining part   inner (4 '') and the outer casing (2 '') are connected to each other by means of a bottom or bottom ring (9) closing, downwards, the space d '' insulation (10) occupying an intermediate position.   5. Brick according to claim 4, characterized in that the insulation (7 '') consists of a loose lining (11) poured into the insulation space (10) and consisting of a thermally mineral material insulating,   in particular in an aggregate (16) of blown glass.   6. Brick according to claim 5, characterized in that the insulation space (10), filled with the lining (11), is closed by a cover (12) on the upper face brick.   7. Brick according to claim 6, characterized by   the fact that the cover (12) is formed by a pulp layer   checked with a preferably mineral binder (20).