DE3246078A1 - COVER STONE FOR A MULTI-SHELLED CHIMNEY AND METHOD FOR PRODUCING A RECEPTION OPENING IN IT FOR A DOOR INSERT OR DUCT PIPE CONNECTION - Google Patents

Description

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Mantelstein for. a multi-shell chimney and procedure to create a receptacle in it for a door insert or sewer pipe connection "

The invention relates to a cladding brick for a multi-shell chimney according to the preamble of claim 1 .

Such a mantle stone is distributed around the inner opening with several channels from DE-OS 32 11 536 of the same Applicant known. In this known mantle stone, the channels serve as flow paths for an from the outside Ventilation gas supplied and discharged to the outside in order to remove aggressive gases, water vapor, that have escaped from the flue gas and the like to be able to discharge. There are two embodiments of recesses known with which the channels with the inner opening of the mantle stone are connected. In one embodiment, the recesses run over the entire length of the mantle stone through, so that at all heights the clear cross-section of the channel and recess, except perhaps of shaping conicities, is the same and the recess is included in the flow path of the ventilation gas. In the other embodiment, the recesses extend only over part of the height of the mantle stone and are interrupted in particular on one of its end faces, so that the recesses only for communication of the actual flow path running in the channels with the Inner opening of the mantle stone are provided, but not in the actual sense in the flow path of the ventilation gas are included.

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The invention relates primarily to such mantle stones, in which the channel and the recess run through the entire height of the mantle stone. In the context of the invention, however it cannot be ruled out that the channel and / or the recess is interrupted in the longitudinal direction of the mantle stone, as long as the mass of the material bridges forming the interruptions is relatively small in relation to the rest of the longitudinal extent of the channel and / or the recess in the mantle stone. If the invention accordingly also includes the use of the channel and / or, if appropriate, particularly considers the recess as a flow path for a ventilation gas, then the However, the invention is not limited to this intended use.

Furthermore, a mantle stone according to the invention can be used individually or in Assembly with other parts, be it a prefabricated chimney part, be it a complete or finished chimney, be connected.

In particular, the mantle stone according to the invention, like the mantle stone of the generic type, is used for the construction of at least three shells Chimneys made of prefabricated parts in question, in which an inner pipe carrying the flue gas is covered by a thermal insulation layer is surrounded and the mantle stone for radial support of the unit accommodated in it made of flue gas pipe and thermal insulation layer serves and insofar primarily ensures the static strength of the chimney. The circumferential surfaces of the inner opening located between the recesses of the mantle stone for radial support of the particular brought into the appropriate configuration Mats or plates serve as the thermal insulation layer.

Now the goal is to develop prefabricated parts for the Chimney production, on the one hand, to be able to get by with as few types of prefabricated parts as possible and, on the other hand, the To construct finished parts so that their production is simple and inexpensive, that they can be easily assembled

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and that they show optimal functions in the chimney. The invention is based on the knowledge that so far has by no means thought through to the end of generic mantle stones / but there are deficiencies in some respects. The invention is therefore based on the object; to further improve the usefulness of a mantle stone of the type mentioned.

In the context of the invention, various aspects are considered, which partially or completely combined result in a particularly high usefulness of the mantle stone according to the invention, but in each case appear inventive in themselves.

The first aspect (claims 1 to 13 and method claim 34) assumes that so far for such chimney sections, where for connection to lateral branch connections of the flue gas carrying inner pipe doors or flue pipe connections were required, special mantle stones were kept in stock. As a result, it was necessary to keep separate stocks of normal and the aforementioned special mantle stones. The invention is initially based on the partial task of being able to avoid this separate storage.

To solve this problem, a generic mantle block has the features contained in the characterizing part of claim 1 on.

This makes use of the fact that the wall thickness between a channel running in the mantle stone and the adjacent section the outer jacket surface can be kept much smaller than the other wall thickness of the mantle stone between outer jacket surface and inner opening. It is therefore sufficient to produce a receiving opening for a door insert or flue pipe connection to cut through only the relatively small wall thickness between the jacket surface and the duct in order to achieve the

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produce lateral boundaries of the desired receiving opening. It is preferable to separate the wall between the outer surface and the channel over the entire height of the stone, so that then a receiving opening for a door insert or smoke pipe connection is created, which covers the full height of the mantle stone Has. This is particularly easy to do with commercially available mantle stones of such a height that there are three mantle stones add joints to about one meter ... (e.g. cladding stone height of 32.6 cm with a joint height of 7 mm). In special cases you can also produce the upper and / or lower limit of such a receiving opening, which is a smaller one Height than the mantle stone has. If both the channels and the recesses run through the entire height of the mantle stone, The separation of the wall between the outer surface and the channel means at the same time a separation up to the inner opening. But even if there are still relatively minor material bridges, e.g. on one face of the mantle stone, you can also cut them through with relatively little effort. However, the arrangement at is preferred which pass through both the channels and recesses as well as the attachment lines for a separating or cutting tool, which form the separating zones, over the entire height of the mantle stone (See. Claim 2, which in addition to this preferred solution also includes partial solutions).

With the respective starting line for the parting or cutting tool the position of the separation zone between the outer surface and the channel is pre-established. If you have different widths for one Wanted to provide a smoke pipe connection or a door insert., Could instead of a pair of attachment lines forming the lateral boundaries of the receiving opening, a pair of double lines are used Select. It has been found, however, that a pair of single lines can be used since both types of Can make stakes equally wide. This is preferred »

It is conceivable, due to the two lines of approach, only one

Prepare the receiving opening. Preferably, however, a such pre-formation of a receiving opening at all relevant Side faces provided in the case of a mantle stone with a cylindrical External surface, for example, front, back and on both sides. The same goes for the outside square or rectangular Mantle stones, the outer shape of which is preferred. In the case of polygonal mantle stones that are more than square, preferably each lateral surface section has such a preliminary formation.

It is not essential that every approach line be one own channel opposite. For example, both attachment lines forming the same receiving opening can also have the same Opposite channel. On the other hand, a plurality of receiving openings can also be provided on a single lateral surface section defining pairs of approach lines may be provided. this applies in particular when the same mantle brick has several inner openings for flue gas pipes, such as a preferred corresponding elongated rectangular mantle stone.

In the generic known mantle stone is in particular a structure with a round, at least rounded, Inner opening, a polygonal surface and the course of Channels are provided in corner areas of the mantle stone, the polygonal shape in particular being square or rectangular. With such an arrangement, the channels are located in wall areas of the mantle stone between the mantle surface and Inner openings are dimensioned thicker than in the areas between the corners. In this case, the wall thickness is preferred of the mantle stone between the respective approach line and the adjacent channel approximately of the minimum wall thickness of the mantle stone between the corners accordingly. One must

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then do not cut through a greater wall thickness between the outer surface and the channel than at the otherwise narrowest points between the outer surface and the inner opening, but has a dividing line close to the corner and sufficient distance between the two. Approach lines to obtain the required width of the receiving opening for a door insert or smoke pipe connection. On the other hand, the wall thickness of the duct is dimensioned sufficiently strong in the area of the starting line so that as is desirable all around in the mantle stone, especially for static reasons.

The wall thickness of the mantle stone is preferably between the respective attachment line and the adjacent one Canal about four to five inches. This means, for example, when the mantle stone is more widely spread and here, too, a preferred type is made of concrete, a statically sufficient wall thickness and corresponds to the practicable depth of engagement of commercially available cutting tools, in particular angle grinders, which allow easy cutting to a depth of at least about five centimeters.

Accordingly, a preferred method for producing a receiving opening for a door insert or Flue pipe connection in a mantle stone according to the invention preferably before that the wall of the mantle stone cut through between the two starting lines and the respective adjacent channel by means of a grinding wheel and the wall section located between the parting lines is removed.

AS

There is a wide range of possibilities, the approach line to design. In individual cases, it may be sufficient to have the starting line black or colored, continuous or interrupted, over the entire dividing line or only over part of it to be identified by coloring, so as to make the Involuntarily directing the operator of the parting or cutting tool to the correct parting line.

However, the approach line can also be used alone or in addition to being colored relative to the surroundings of the lateral surface be geometrically designed differently, for example as a smoothed or sandblasted zone in relation to a harsh environment. Apart from the fact that such a geometric design also fulfills an optical guiding effect, it can also be used directly as a starting line for the dividing or Serving cutting element of the associated tool.

The latter is possible in particular when the approach line is designed in the shape of a channel. There are many different Channel shapes, e.g. rectangular, triangular or trapezoidal grooves as well as rounded channels, especially semicircular channels or U-shaped gutters, in question.

In terms of extensive prefabrication, an adapted door insert according to claim 10 is also expediently provided, the preferably has a surrounding frame.

Such a circumferential frame is provided in two preferred configurations according to claims 12 or 13, whereby, according to claim 12, with a somewhat more complex structure of the insert, the installation work is minimal and

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Claim 13, the prefabrication effort is smaller, but the installation effort something bigger. The choice of the right alternative depends on the circumstances.

Another, the serviceability of the known generic The partial aspect that restricted the mantle stones was that when placing a mantle stone on the joint compound, like mortar, provided face of an underlying mantle stone, grout is pressed into the channel and in this falls down. This is particularly undesirable when the respective channel, possibly with an associated one Recess, is used as a flow path for a ventilation gas supplied from the outside and discharged to the outside. But this can also be undesirable in other cases.

The invention is therefore also based on the second sub-task, a fall of grout into a channel and, if necessary, counteract a recess. The invention provides three alternative approaches to this, realized individually or in duplicate or in total combinations could be.

The first approach is implemented by the characterizing feature of claim 14 with an advantageous further development according to claim 15. Roughly speaking, the respective channel in the joint area is each provided with such an extension, that this extension can accommodate squeezed excess grout. There is both the possibility given that the end face coated with the grout laterally compared to the normal channel cross-section something remains offset as well as the particular claim

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15 mentioned possibility that the upper face of the mantle stone remains unmodified and only on the above the underside of the next mantle stone an escape room is created.

The second approach is that according to claim 20 with the advantageous developments according to claims 21 and 22 a kind of weir is formed, which overflows the grout prevented in the canal.

Finally, the third approach provides for an extension of the effective end face of the mantle stone according to claim 19 partial overhang of the channel and / or the recess so that the extension of this end face an additional Represents receiving platform for squeezed grout.

In all of these three approaches, you can also adapt to the fact that when you put a mantle stone on one below the grout located on it is generally only shifted in a diagonal direction is, for example, if you look at the horizontally arranged upper face of a lower cladding stone in an edge area first touches one edge of the tilted upper mantle stone and then tilts it down onto the surface. Then it will be the grout move in the direction of the opening of the tilting gap. A geometric adaptation to this possibility However, it is a prerequisite that the mantle brick has a certain orientation from the outset or a certain assembly instruction given is. Normally, the arrangement will be largely invariant in terms of angles in order to facilitate the assembly as possible without being able to make additional considerations.

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The third approach mentioned also creates a throttle point in the channel and / or the recess for a ventilation gas flowing therein. Such a creation of a throttle point, possibly also in other areas than in continuation of the upper end face of the mantle stone represents a third partial aspect of the invention.

Sometimes one tries to get a maximum amount of ventilation gas, mostly air, through the respective flow path in the mantle stone to circulate. This provides maximum amount of means of transport for unwanted or harmful gases or Fumes. Sometimes, however, you also want to reduce the amount of ventilation gas converted, for example by Do not lower the temperature in the mantle stone too much. If then the ventilation gas in the mantle stone is slightly higher Temperature, it can partially compensate for the loss of quantity in that it has a higher temperature at a higher temperature Has the ability to absorb steam, for example. One Throttling of the flow of the ventilation gas can then also be desired, especially in the case of cladding stones of the generic type if the recess is included in the flow path and too strong a flow leads to structural deterioration or even gradual damage to an adjacent thermal insulation layer, for example Roughening of the fibers and finally removal on the outside of the thermal insulation layer facing the recess.

Throttling points of the channels and / or the recess can also be useful if the channel recess system does not serve as a flow path for a vent gas at all; because regardless of the ventilation, throttle

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also serve as catchment cross-sections for those that have fallen down Lumps of grout, which experience has shown not to fall strictly vertically, but rather a more complicated fall curve describe. If chunks of grout fall, it is often desirable if they do not reach the bottom of the respective channel or the respective recess fall altogether, but at least partially earlier in the manhole get stuck and so do not lead to excessive accumulations of material on the hardened grout.

Now you can see the flow of aeration gas as well set in the area of its inlet or outlet to or from the chimney. However, this could lead to mismatches come, and in any case, such an adjustment requires additional resources. Some of the features mentioned above cannot be performed at all at the inlet or outlet of the ventilation gas, such as the function of a filler mass trap.

According to the third partial aspect of the invention, at least one of the channel and / or the recess is formed as a constricting throttle point.

Such a throttle point can therefore from the outset not only depend on the respective flow conditions in the mantle stone serve adapted immanent throttling of the flow of a ventilation gas, but in each case according to the requirements adapted multiplicity along the mantle stone also serve, for example, as a joint compound trap. Also offers the advantage of being able to adjust the flow of ventilation gas with the throttling and at the same time full freedom to have in the other duct dimensioning, be it to save mass, be it to approach the outer jacket surface in the sense of the first partial aspect of the invention.

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Claim 18 enables this throttling point of view also to be combined with the third solution, with which a dropping of grout can be prevented at all can. But even without this point of view, it is easiest to create a throttle point in the forehead area of a mantle stone train, if only for reasons of demolding.

For the same reasons for demolding, in the first partial aspect of the invention, the respective starting line for a separating or Cutting tool expediently already formed in the form for the mantle stone, what the alternative solution according to Claim 9 also distinguishes itself.

Even if similar mantle stones are arranged one above the other so that corresponding throttle points each after Position and shape come to lie strictly on top of each other, the trap function of falling grout can be due to the already mentioned irregular fall path of such a mass can still be realized. This enables a particularly simple one Angled design of mantle stones according to the invention. However, you can also use a choose such a formation of the mantle stone or such a pairing of mantle stones that with stacked mantle stones the throttle points can be arranged offset from one another. A preferred embodiment of the latter Art describe the features of claim 33.

It is conceivable per se, the throttle point immediately adjacent to the inner opening of the mantle stone in the area of the Provide recess and here, if necessary, even completely close the recess along the circumferential line of the inner opening close so that then only the channel cross-section, if necessary with subsequent partial cross-section of the

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can be available as a cross-section for a ventilation gas. Preferably, however, the recess on the the entire height of the mantle stone freely into the inner opening of the mantle stone open and the throttling should only be provided in the areas of the duct remote from the inner opening (cf. Claim 26); this also takes into account the fact that grout in the above-mentioned tilting process in general from the outside of the end face provided with grout is shifted further inwards and then from there located throttle point can be included if it also serves as a catchment platform.

Claims 27 to 32 describe advantageous designs of the channel together with a recess and a preferred throttle point formation.

The invention is described below with reference to schematic drawings explained in more detail using several exemplary embodiments. It shows:

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1 shows a horizontal cross section through a three-shell chimney using a first embodiment of a mantle block according to the invention with a cut in the area or just below the upper horizontal face of the mantle stone;

FIG. 2 shows a vertical radial section of the chimney according to FIG. 1 along the line I-I;

FIG. 3 shows an enlarged detail in a more detailed illustration of the area Z of FIG. 1; FIG.

4 shows a horizontal cross section through a three-shell chimney using a second embodiment of a mantle block according to the invention, with an illustration the upper face of the mantle stone in plan view;

5 shows a vertical radial section of the chimney according to 4 along the line IV-IV;

FIG. 6 shows an enlarged detail of the area Z of FIG. 4; FIG.

7 shows a vertical radial section through a chimney using a third embodiment of a mantle stones according to the invention;

8 shows a horizontal cross section through a three-shell Chimney using a fourth embodiment of a mantle block according to the invention with illustration in plan view of its upper end face;

9 shows a horizontal cross section through a multi-section, three-shell chimney using a fifth Embodiment of a mantle stone according to the invention

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in the representation in plan view of the upper end face of the mantle stone;

Fig. 10 is a horizontal cross section through a chimney with additional shaft using a sixth embodiment of a mantle stone according to the invention in Top view of the mantle stone and with the installation of a first embodiment of a door insert;

11 shows a cross section through a three-shell chimney according to FIG. 1, but with an end view of the mantle block and installing a second embodiment of a door insert and

FIG. 12 shows a horizontal cross section according to FIG. 11, but with the installation of a smoke pipe connection instead of the door insert.

All of the chimneys shown have a triple shell Structure provided. The innermost shell is formed by a flue gas-leading inner pipe string, which is made up of each other grouted and cemented chamotte ears 2 is composed. The fireclay tubes are covered with a thermal insulation layer surrounded by mineral fiber mats or plates 4, which form the middle layer. The outer layer forms a Mantle stone 6 made of lightweight concrete. Further layers are conceivable, e.g. the inclusion of a vapor diffusion insulation layer. as well it is conceivable, for example, to integrate the thermal insulation layer and the inner pipe run into a common layer. However, the described structure of at least three and in particular precisely three layers is preferred.

The fireclay tubes 2 are tubes with a cylindrical inner surface and a cylindrical outer surface, if one is in each case of shaping conicity disregards. The mineral fiber mats or plates 4, which may be slotted, are around the fireclay tubes

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laid around in such a way that they encase them as seamlessly as possible. The inner pipe string from the fireclay pipes 2 and the thermal insulation layer from the mineral fiber mats or plates 4, which have essentially constant thickness, find their outer Support on the unexcepted areas 8 of the - again Except for the conical shape - inner surface of the inner opening of the mantle stone 6. The mineral fiber mats or plates 4 are so arranged with a little radial play between the inner pipe string from the fireclay tubes 2 and the mantle stones 6, that the inner tubing can freely thermally extract and contract. The support in the uncut areas 8 gives the statically unstable aggregate of the two inner shells on the statically stable designed mantle stones 6 the required static strength of the chimney.

All of the shell stones 6 shown have polygonal outer shell surfaces 12. Their horizontal cross-section is, with the exception of the the two exemplary embodiments according to FIG. 9 and 10 are each square and, in the exemplary embodiment of FIGS. 9 and 10, elongated rectangular, the extent of the elongated formation in the embodiment according to FIG. 9 about two and a half times, in the embodiment according to FIG. 10 one and a half times of the square basic dimension. The corresponding cross-sections extend in the longitudinal direction of the mantle stone essentially, again except for any shaping conicities that may be present, further congruent.

Even if the configuration described with a cylindrical. Inner pipe run, essentially constant thickness thermal insulation layer and inside cylindrical and outside square or rectangular mantle stone is preferred, so fall into the frame of the invention, however, also mantle stones with different shapes of inner opening 10 and outer mantle surface 12; for example be mantle stones with a square or rectangular inner opening and surface shape as well as inside

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and outside cylindrical casing stones, each with a constant wall thickness, if necessary.

More or less rounded transitional forms are also possible.

The basic square shape is provided here if the Mantle stone has only a single inner opening 10 for receiving a flue gas leading inner pipe string. As Fig. shows, however, several such inner openings 10 can also be used be present, in the case shown there, two such inner openings 10 in the same mantle stone 6.

Furthermore, the mantle block 6 can also have shafts 14 for others Purposes, for example air ducts, cable ducts or garbage ducts, of which one air duct 14 is shown in FIGS. 9 and 10 is shown. While in Fig. 10 the air shaft 14 on one side next to the inner opening 10 in the longitudinal direction of the Rectangular extension of the lateral surface 12 is arranged, in the embodiment of the lateral stone 6 according to FIG. 9, there are two Inner openings 10 and an additional air shaft 14 above the longitudinal extension of the rectangular shape of the mantle stone distributed, with the air shaft 14 in the middle and the two inner openings 10 are arranged symmetrically on both sides of it.

From the radial sections of FIGS. 3, 5 and 7 it can be seen that expediently, the fireclay pipes 2 and the casing stones 6 in the chimney are axially offset from one another in order to prevent them from escaping to prevent flue gas along a common horizontal joint as far as possible. The mineral fiber mats or plates 4 can be arranged offset with respect to the respective joint. However, it is also within the scope of the invention not excluded that the possibly consisting of several fireclay tubes 2, the thermal insulation layer and the mantle stone together a prefabricated one

Form a prefabricated chimney element. However, the individual layers step by step from elements 2, 4 and 6 built up, whereby several fireclay tubes 2 can come to the length of a mantle stone 6.

In the respective mantle stone 6, channels 16 run along the mantle stone, four of which are distributed around each inner opening 10 and each communicate with the inner opening 10 via a recess 18 in the mantle stone 6. The channels 16 together with the associated recesses 18 are mirror-symmetrical to the bisector of the corners of the respective outer circumferential surface 12 of the cladding stone 6 is arranged. The recesses 18 extend in the same way as the channels Over the entire axial height of the respective mantle stone 6.

The clear cross section of the respective channel 16 is on the outside each bounded by two legs 20 of an angle which is at the same angle as the adjacent corner 22 (cf. 3 and 5) stands without loss of generality, with the legs 20 parallel to those adjoining the corners 22 Pages 24 of the outer jacket surface 12 run. The distances d between the respective legs 2 0 and the to them parallel sides 24 of the outer jacket surface 12 are essentially equal to the minimum thickness d of Mantle stone 6 in the area between its corners (see. Fig. 1 and 4). The lateral boundary lines adjoining the legs 2 0 26 of the horizontal cross-section through the respective channel 16 extend into the inner opening 10 of the Mantle stone 6 straight and parallel to each other and to the bisector of the adjacent corner 22 of the outer Mantle surface of the mantle stone 6 with simultaneous formation of the recess 18. That of the respective adjacent corner 22 opposite connection point of the two legs 20 is formed as a rounding 28, while the corners 22 themselves preferably Are formed at an acute angle.

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In the event that the channels 16 as flow paths for one of Aeration gas supplied to the outside and discharged to the outside are used, are the recesses running through with the channels 16 18 in the flow path of the ventilation gas, in particular of ventilation air, included.

Even if in all of the illustrated embodiments of mantle stones 6 shows the cross-section of channel 16 together with the recess with nuances in the same way, but it can also be have no other shape. Different degrees of rounding of the one formed by the legs 20 are shown Channel area and radially different attachment points of leg 20 and boundary line 26, as can be seen from the graphic representation results easily.

In all illustrated embodiments of mantle stones extends along the entire respective mantle stone 6 on each of the four sides 24 of the mantle stone a pair of at least two approach lines 30 for a parting or cutting tool. Each approach line 30 is preferably semicircular or U-shaped channel. The pairs of approach lines 30 are with the exception of the embodiment according to FIG. 10 each assigned to an adjacent inner opening 10. This results in all embodiments with the exception of Fig. 9 each have a pair of approach lines 30 per side 24. However, since in the longitudinal direction of the horizontal Cross-section of Fig. 9 distribute two inner openings 10, There are also two pairs of neck lines 30 on the long ones Pages 24 of the lateral surface 12 arranged, while otherwise only a pair of approach lines 30 is provided.

As a rule, the approach lines are in all the exemplary embodiments 30 in each case opposite the adjacent channel 16, so that each starting line 30 is then assigned its own channel 16 is. However, this is not absolutely necessary, as the exemplary embodiment of FIG. 10 shows, where at one

On the narrow side of the outer circumferential surface 12, a pair of attachment lines 30 is opposite a single additional shaft 14. The same can be given in the case of a different design of the channels 16 in the area of the inner openings 10, especially if the inner and / or outer configuration of the mantle stone is designed differently, e.g. both rectangular or both cylindrical.

The approach lines 30 are expediently symmetrical to the corners of the mantle stone 6 and run in a straight line, essentially axially or parallel to the corners. The distance to the respective Corner 22 or the mutual distance between the two attachment lines 30 is expediently chosen so that the attachment line 30 each in the area of minimum wall thickness d between the outer jacket surface 12 and the adjoining channel 16 (or also its subsequent recess 18) is located. You can see that with the selected configuration, the wall thickness d along the entire leg length 20 remains the same and therefore the mentioned condition can ideally be fulfilled in the same way in this area. Since the approach lines 30 as well as the channels 16 and their recesses 18 along the entire height of the mantle stone 6, you can cut through the wall between the approach line 30 and at right angles to the outer circumferential surface opposite point of the leg 20 the whole between the respective two sowing lines, which are cut through, lying Remove the wall area of the mantle stone. With a suitable choice of the distance between the two approach lines 30, one gains a Receiving opening 32 for receiving a door insert 34 (FIGS. 10 and 11) or a smoke pipe connection 36 (FIG. 12). How one can be seen in FIGS. 10 to 12, the lateral ones extend Cheeks of this receiving opening each up to the leg 20 of the associated channel 16; which extends over the entire height of the Mantelsteins 6 extending receiving opening 32 is over the channel 16 and its subsequent recess 18 to Inner opening 10 is freely extended. In the case of an analogous severing adjacent to the additional duct 14 according to FIG Fig. 10 then gives an analog receiving opening in

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Connection to this additional shaft 14, for example for a door insert of an inspection door, a garbage disposal door or the like. Can be used.

Wherever such pairs of approach lines 30 are provided are, you can accordingly create a receiving opening 32 by severing the line 30 located behind the respective approach Create wall areas that go through along the entire mantle stone 6 and access to the one behind it Channel 16 or 14 enabled. Since on each side 24 of the respective mantle stone 16 at least one pair of such Approach lines, in each case exactly with a square cross-section a pair of such lines of approach is present, one can have such a receiving opening 32 on any side of the mantle stone.

You can use the grinding wheel of an angle grinder for this purpose, for example use if you measure the dimension d in a preferred manner with about 4 to 5 cm. Even with greater depths of engagement Cutting through with a grinding wheel is still possible, but more time-consuming and usually more laborious.

In the area of a receiving opening 32 leading to an inner opening 10, such a fireclay tube 2 is expediently used, which has a lateral pipe extension 38 which, for example, in the case of a door extension can have an approximately rectangular cross-section, but normally has a cylindrical cross-section in the case of a flue pipe connection . In the former case, desirably, the tubular extension 38 of the receiving opening extends into the region of the rear edge 32 (Fig. 10 and 11), so that the door liner 34 can be vorgebaut inside the receiving opening 32, ^r currency rend a smoke pipe connection appropriately into the region the outer circumferential surface 12 is led out (Fig. 12), so that there, for example, a further pipe part can be telescopically inserted.

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In the latter case, it is sufficient to use the smoke pipe connection 36 to close by means of an insert 40 formed from mineral fibers against the receiving opening 32, so that then the combination of the lateral pipe extension 38 serving as a smoke pipe with the preferably one-part, possibly also multi-part, Insert 40 gives the flue pipe connection 36.

The two illustrated in FIGS. 10 and 11 are particularly suitable for the formation of the door insert 34 alternative embodiments.

In both embodiments, the door 42 is on a hinge 44 on one side on a one-piece frame-shaped Articulated element which is designed as a frame 48 circumferentially. The door 42 has a bearing on its inside Lining 46 made of insulating concrete and engaging in the frame-shaped element.

In the first embodiment according to FIG. 10, the frame 48 an open angle profile 50 formed by a metal frame part made of cast iron. This has a base part 52, which delimits the door opening all the way round, vertically on the sides and otherwise runs horizontally and in the area of the lateral surface a short bend 54 parallel to the lateral surface and directly before. the side pipe extension 38 or in the rear area the receiving opening 32 is a parallel to the lateral surface 12 and has a long bend 56 extending as far as the receiving opening 32. The area between base part 52, up- receiving opening 32 and both bends 54 and 5 6 is with a filling compound 58, preferably mortar, filled, which then due to the configuration a frame of filling compound with about rectangular cross-section of each frame member forms.

The frame 48 of the second embodiment is in principle formed the same, but has a not so long dimensioned

longer turn 56. In the borderline case, the length of the bends 54 and 56 from the base part 52 can even change or the same be.

Here the three frame elements 52/54 and 56 form an inner one Retaining border for a prefabricated concrete frame 58 which essentially fills the receiving opening 32 with a massive amount with the receiving opening 32 a receiving gap 60 widening in a wedge shape from the inside to the outside for joint filling compound, especially mortar.

Measures are also provided on the mantle stones 6 to prevent falling onto the upper end face of the mantle stone 6 applied filling compound, such as joint mortar, into a channel 16 or the adjoining recess 18, if possible prevent or keep it low. Three possibilities are shown here, which can also be combined in pairs or together can be.

The first possibility provides that, according to FIGS on the lower face of the mantle stone 6, the transition from the end face into the inner opening 10 of the mantle stone as an inclined surface 62 opposite the lower end face 64 of the Mantelsteins 6 is formed set back. As a result, the joint compound 66 can below the upper end face 68 the inclined surface 62 when the upper mantle stone 6 is placed on the lower one, at least partially collecting. The lower end face runs horizontally through to the vertically adjoining inner opening, so that a displacement at the inner edge of the upper end face can take place upwards. This arrangement has the advantage, neither narrow the channel 16 or the recess 18 somehow, if this is undesirable.

The recessed zone 70 formed by the respective inclined surface 62 runs along the entire border of the channel

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and recess 18, that is, along the legs 20 and the boundary lines 2 6 full with the same depth um, for example with the depth between 1/3 and 2/3 of d, preferably with smaller ones Dimensions of this dimensioning range.

According to the second possibility, an insert ring 72 is placed on the upper end face of the mantle stone 6, which is approximately the Has the shape of a lying T. A central flat leg 7 4 engages in the joint filled with joint compound 66 the two mantle stones 6 arranged one on top of the other, while the two arms enter the lower channel 16 and 18, respectively or engage in the upper channel 16 and 18, respectively. The upper arm forms a collar to prevent the filling compound from overflowing the channel 16 together with the recess 18. The insert ring 72 is dimensioned on the inside so that the inner opening 10 is not covered.

Finally, the third possibility is shown particularly clearly in FIG. 2.

Here the mantle stone is without modification at its lower end · At its upper end it is partially with a channel 16 overhanging inner extension 80 of the upper end face of the mantle stone. The extension 80 goes console-like, here via a bevel 82, into the normal inner surface of the channel 16 downwards. The partially the canal 60 overlapping extension of the horizontal upper end face 68 allows it of the joint compound 66, on the one hand inwards and on the other hand upwards within the non-throttled Area of the channel 16 in the lower section of the upper mantle stone expand without falling into the channel 16 again to have to.

The normal channel contour with the legs 20 is shown in FIG. 3 shown in dashed lines in the unthrottled area, as well as the continuation with the boundary lines 26 below the Throttling. The from the overhang of the console-like

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33

Extension 80 formed throttle point 82 covered according to 3 shows a zone of the channel 16 adjoining the two legs 20 with a constant zone measured along the boundary lines 26 Expanse. The width of the zone can be between about 1/3 and 2/3, preferably about 1/2, the length of the lateral Boundary lines 26 of the horizontal cross section through the channel 16 together with the recess 18 amount.

With this arrangement of a throttle point, an unthrottled one that runs along the entire height of the mantle stone 6 is achieved free cross-section of the recess 18 together with the subsequent " Section of channel 16; Channel 16 and recess 18 are anyway not strictly separable from each other.

The training described is without loss of generality a throttle point 82 also in the embodiments 9 to 12 are based, while the embodiments of FIGS. 4 to 6 are an extension instead of a throttling demonstrate.

Fig. 8 finally shows an alternative embodiment of a Restriction 82.

In this case, the throttle point 82 only adjoins a lateral boundary 20, 26 of channel 16 and recess 18, each at right angles to the leg 20 or to the boundary line 26 measured width of the throttle point is again essentially constant. For example, if you define When viewed from the outside along the radius towards the inner opening 10, a “left” delimitation 20, 26 and a “right” delimitation 20, 26, see above changes in the illustration of FIG. 8, a connection of the Throttle point 82 to the left boundary 20, 26 at the bottom left in the drawing in a clockwise direction in a connection of the throttle point 82 to the right boundary 20, 26 in the upper left Corner of the graphic representation, etc. This makes it possible, when the same mantle stones 6 are arranged one above the other, the

however each do 90 ° rotated around their axis to achieve that in a path that is formed by superimposed channels together with recesses, each one to a left boundary The subsequent throttle point and a throttle point adjoining a right-hand boundary also alternate on top of one another and so the throttling points are offset from one another. As a result, you may have fallen into the canal Catch the joint compound at least partially even if it falls into the channel 16 or the recess 18 and even falls vertically.

Claims (34)

Mantle stone for a multi-shell chimney and procedure for making a receiving opening in it for a door insert or sewer pipe connection Expectations 1 »Mantle stone for a multi-shell chimney with at least one channel that is located in the mantle stone in its Extends in the longitudinal direction and is open via a recess to the inner opening of the mining stone, in particular several such channels are distributed around the inner opening, characterized in that that on the jacket surface (12) of the mantle stone (6) at least two starting lines (30) for a cutting or cutting tool POST CHECK ACCOUNT: MÖNCHEN 501 75 - 809 <BANK ACCOUNT: DEUTSCHE BANK A.Q. MÖNCHEN, LEOPOLDSTRASSE 71. ACCOUNT NO. M / 35 794 each of a channel (16) are formed opposite one another and that the mutual distance between these two lines of approach (30) is the width of a receiving opening (32) for a door insert (34) or smoke pipe connection (36) corresponds. 2. Mantle stone according to claim 1, characterized in that the channels (16) recesses (18) and / or approach lines (30) over the height of the receiving opening (32) for the door insert (34), preferably over the entire height of the casing stone, run through. 3. Mantle stone according to claim 1 or 2, characterized in that several, preferably at least four, pairs such approach lines (30) over the circumference of the lateral surface (12) are distributed. 4. Mantle stone according to one of claims 1 to 3 with a rounded inner opening, polygonal jacket surface and course of channels in corner areas of the mantle stone, characterized in that the wall thickness (d) of the mantle stone (6) between the respective approach line (30) and the adjacent channel (16) approximately the minimum wall thickness of the mantle stone corresponds between the corners (22). 5. mantle stone according to one of claims 1 to 4, characterized in that the wall thickness (d) of the mantle stone (6) between the respective approach line (30) and the adjacent channel (16) is about 4 to 5 cm. 6. mantle stone according to claim 4 or 5, characterized in that each between adjacent corners (22) of the Mantelsteins (6) lying flat jacket section (24) each with a pair of such approach lines (30) per adjacent, for the reception of a thermally insulated flue gas pipe serving inner openings (10) is provided. 7. mantle stone according to one of claims 1 to 6, characterized in that the approach line (30) as optical distinctive guideline is formed. 8. mantle stone according to one of claims 1 to 7, characterized in that the approach line (30) opposite the surrounding surface area is designed to be geometrically different. 9. mantle stone according to one of claims 1 to 8, characterized in that the approach line (30) channel-shaped is trained. 10. Mantle stone according to one of claims 1 to 9, characterized by a door insert (34), the width of which from the approach lines (30) pre-formed receiving opening (32) and its depth of wall thickness between the approach line (30) and adjacent channel (16) corresponds, preferably his Height corresponds to the height of the mantle stone (6). 11. Mantle stone according to claim 10, characterized in that the door insert (34) has a circumferential frame (48) having. 12. Mantle brick according to claim 11, characterized in that the frame (48) is one, preferably of a metal frame part (50) edged, precast concrete frame (58), which has a filling compound, preferably mortar, with the Mantle stone (6) can be connected (Fig. 11). -A- 13. Mantle brick according to claim 11, characterized in that the frame (48) is a, preferably of a metal frame part formed, open angle profile (50), which together with the mantle stone cut out along the attachment line (30) and the end face of a connector (38) a flue gas pipe inserted into the inner opening (10) of the mantle block (6) one with filling compound, preferably mortar, fillable receiving gap (66) forms (Fig. 10). 14. Mantle stone, in particular according to one of the claims 1 to 13 and preferably with the use of the respective channel and, if applicable, the associated recess as Flow path for a ventilation gas supplied from the outside and discharged to the outside, characterized in that on at least one end face of the mantle stone (6) is the transition from the end face (64) to the inner opening (10) of the mantle stone is formed set back with respect to the end face. 15. Mantle brick according to claim 14, characterized in that that the reset is only formed on the lower face of the mantle stone (6). 16. · Mantle brick according to claim 14 or 15, characterized characterized in that the recess is designed as an inclined surface (62). 17. Mantle stone, in particular according to one of claims 1 to 16 and preferably with use of the channels and optionally the recesses as flow paths for a ventilation gas that is supplied from the outside and discharged to the outside, characterized in that in the mantle stone (6) at least one that constricts the channel (16) and / or the recess (18) Throttle point (82) is formed. 18. Mantle brick according to claim 17, characterized in that that a throttle point (82) is formed on at least one, preferably only the upper, end of the mantle stone (6) is. 19. Mantle brick according to claim 18, characterized in that that the throttle point (82) the end face (68) of the mantle stone with partial coverage of the free cross section of channel (16) and / or recess (18) expanded. 20. Mantle stone according to one of claims 14 to 19, characterized by the outline of the at the top Front side of the mantle stone formed clear cross-section of the channel and optionally the recess extending upwards Collar (76). 21. Mantle stone according to claim 20, characterized in that the collar is formed by an insert ring (72). 22. Mantle stone according to claim 21, characterized in that the insert ring (72) has a horizontal T-profile forms. 23. Mantle stone according to one of claims 17 to 22, characterized in that the throttle point (82) in the Material of the sheath is formed. 24. Mantle stone according to one of claims 17 to 23, characterized in that several throttle points (82) des- the same channel (16) and / or the same recess (18) over the Length of the mantle stone (6) are distributed. 25. Mantle stone according to one of claims 17 to 24, in which the channels and recesses run along the perpendicular, characterized by such a design of the mantle stone (6) or such a pairing of mantle stones that the throttling points when mantle stones are placed on top of one another can be arranged offset from one another (Fig. 8). 26 .. mantle stone according to one of claims 17 to 25, in which the recesses are part of the flow paths, characterized in that the throttle points (82) in the mantle stone (6) further outside than the area of the respective flow path adjacent to the inner opening (10) of the mantle stone are arranged. 27. Mantle stone according to one of claims 17 to 26 with a polygonal outer jacket surface and training of the channels in the corner areas, characterized in that the clear cross section of the respective channel (16) outside of two legs (20) of an angle is limited which is at the same angle as the adjacent corner (22) of the outer The lateral surface (12) of the lateral stone (6) is standing and its legs are parallel to the sides (24) adjoining the corners the outer jacket surface. 28. Mantle brick according to claim 27, characterized in that that the distances (d) between the respective legs (20) and the sides (24) of the outer lateral surface parallel to them (12) are essentially equal to the minimum thickness (d) of the mantle stone (6) in the area between its corners (22). 29. Mantle brick according to claim 27 or 28, characterized in that that the lateral boundary lines (26) of the horizontal cross-section adjoining the legs (20) through the channel (16) to form the recess (18) to in the inner opening (10) of the mantle stone (6) run in a straight line. 30. Mantle stone according to claim 29, characterized in that the lateral boundary lines (26) are parallel to one another and extend to the bisector of the adjacent corner (22) of the outer jacket surface (12) of the jacket stone (6). 31. Mantle stone according to one of claims 17 to 30, characterized in that the throttle point (82) is an essentially constant width adjoining the two legs (20) Zone of the channel (16) covers. 32. Mantle stone according to claim 31, characterized in that the width of the zone is between about 1/3 and 2/3, preferably about 1/2, the length of the lateral boundary lines (26) of the horizontal cross section through the channel (16). 33. Mantle stone according to one of claims 25 to 30, characterized in that the throttle point (82) only one a zone of the channel or the recess adjoining a lateral delimitation (20, 26) of the channel (16) and / or recess (18) covered and the zones are distributed around the inner opening (10) of the mantle stone that upon rotation of the mantle stone by a predetermined angle, preferably of 90 °, therein aligned channels (16) and / or recesses (18) change the side boundary adjoining the zone (Fig. 8). 34. Method of making a receiving opening for a door insert or smoke pipe connection in a mantle brick according to one of Claims 1 to 16 and optionally one of claims 17 to 33, characterized in that the wall of the mantle stone between the two lines of approach and the respective adjacent channel is severed by means of a grinding wheel and the one located between the parting lines Wall section is removed.