DE19511680A1 - Furnace chimney seal - Google Patents

Abstract

The sealing system to hold a furnace pipe (10) in a cylindrical chimney sleeve (14) has a base ring (1) and clamping ring (3) as the clamping system, with an inner ring section (5, 6) at the furnace ring (10) at right angles to the axis (A) of the pipe (10). The inner ring sections (5, 6) of the base ring (1) lie flat on a ring flange (13) projecting at right angles from the chimney sleeve (14), and are secured to it. The ring seal (2), of silicone, is between the inner ring section (5) of the base ring (1) and inner ring section (6) of the clamping ring (3), to give a heat resistant elastomer seal (2). The clamping action is applied by clamping screws (21, 22), to clamp the clamping ring (3) along the axis (A) to the base ring (1), and apply an axial squeeze to the seal (2) so that it expands at least partially radially inwards to the furnace pipe (10), through its elasticity. The base (1) and clamping (3) rings are of metal plate, or of moulded heat-resistant plastics layers or of ceramics.

Description

The invention relates to a stovepipe sealing device for Holding a stovepipe into an i. w. cylindrical Chimney sleeve of a chimney access opening Wall lining is inserted or pushed through on the wall lining and to seal the stovepipe against the wall lining, wherein the sealing device is attachable to the wall lining and an annular surrounding the furnace tube Clamping device for receiving an annular seal elements and bracing against the stovepipe.  

Such a sealing device is known from the DE-PS 17 51 035.

The exhaust gases from heating systems are usually over a Stove pipe into a chimney and through it (filtered or un filtered) derived into the atmosphere. The chimney is usually solid masonry and has one or more Fireplace access openings, in each of which the burner end of a stovepipe facing away from a heating system protrudes. The chimney access opening in the chimney flue the chimney is mostly covered with a wall lining, wel ches a cylindrical chimney sleeve and face on the side facing away from the chimney perpendicular to the chimney sleeve protruding, lying flat on the chimney cheek Has ring flange. Between the inner peripheral surface of the Chimney access opening and the outer peripheral surface of the chimney sleeve is usually several millimeters thick Cement mortar layer provided, by means of which the wall lining is firmly connected to the chimney.

In the chimney sleeve of the wall lining is now from the outside the side of the chimney facing away from the burner Axially inserted end of a stovepipe. For the exit to reduce soot or thick smoke as well as aesthetics beautification of the connection area between the stove pipe and wall lining usually becomes one towards the burner side bulged decorative ring made of metal against the stovepipe pushed the chimney flue, which ver the connection area covers.

Wall lining cones are less common, but also known structures with a simple cylindrical Chimney sleeve an essentially U-shaped in longitudinal section,  double-walled sleeve is provided between the double the chimney end of the stovepipe becomes. Such a double-walled chimney sleeve acts accordingly as a kind of labyrinth seal that there is soot and smoke particles difficult, from the chimney area between wall lining ter and stovepipe to get outside. These Labyrinth seal, however, grants just like the usual one fold chimney sleeve no reliable sealing function; also will nor the stovepipe inserted into the wall lining axially held on, but can easily be used again be pulled out.

Such stovepipe connections to chimney access openings are for example from the company catalog "chimney technology" from Schiedel GmbH & Co., Munich, pages 42-44, 08/1994 known in many variations. All this execution stances of smoke pipe connections is common that they are not safe against the escape of smoke and soot, even less against the escape of moisture from the interior of the fireplace poetry.

In contrast, this represents a significant improvement the initially cited DE-PS 17 51 035 known wall lining for stove pipes, in which by means of a radially acting Clamping device from a variety of individual cords or twisted asbestos string against the circumference of the in specially designed wall lining inserted stovepipe is sealed soot and smoke-tight at the end.

There is a considerable disadvantage of the known device however, in that the mechanics proposed there are very is agile. For example, the clamping part alone contains the device very many complicated to produce  parts, such as a special clamping screw, which is actuated axially, but a tension in the radial direction tion caused by a complicated deflection mechanism. The known device is therefore very manufacturing expensive, but also extremely complex to assemble. also can only the sealing device contained therein together with the wall lining into the chimney access opening be built. This is also due to the special off Formation of the wall lining making an oven tube sided recess of considerable depth in the chimney cheek required, due to government regulations may not be carried out without further ado, but nor sometimes from the district chimney sweep to Inaugen acceptance must be approved beforehand. Already existing, commercially available wall lining, which is only as described above ben, a cylindrical chimney sleeve and possibly one have ring flange on the front side, must be expensive beforehand get extended. Therefore, it has from DE-PS 17 51 035 can not enforce known device on the market and was only used in a few individual cases.

The object of the present invention is therefore an oven Pipe sealing device of the type described in the introduction make, which is constructed much less expensive inexpensive, easy to obtain individual parts and easily to a conventional, already existing and fixed wall lining with cylindrical chimney sleeve and the ring flange on the front side is to be installed without it the chimney flue is affected or even damaged must, the sealing effect at least as good as in the known device.

According to the invention, this object is surprising  simple but effective way solved in that the clamping device around a base ring and a clamping ring summarizes which at least on their adjacent to the stovepipe radially inner part each an i. w. perpendicular to the axis have the inner ring section of the stovepipe, the inner ring portion of the base ring on a i. w. Ring flange protruding vertically from the chimney sleeve lies flat and can be fastened to this between the inner ring portion of the base ring and the tension ring the annular sealing element is arranged, which consists of heat-resistant, elastomeric material, and that the Clamping device includes clamping screws with which the clamping ring in the direction of the axis of the stovepipe with the base ring can be braced, the interposed Sealing element is crushed axially and because of it Elasticity at least partially radially inwards to the furnace tube evades.

Because of the axial sequence of the base ring and sealing element and clamping ring is the furnace seal according to the invention Direction extremely easy in the axial direction from the Bren to be mounted on the back of the stovepipe and easily at any time accessible. By axially squeezing the elastic Tightly around this at least partially gives way radially inwards NEN and seals the stovepipe against the base ring. Since the fireplace side surface of the inner ring portion of the Base ring flat on the ring flange of the wall lining there is no soot or smoke from the Escape the interior of the fireplace, so that the entire arrangement after is tight on the outside. With a suitable attachment of the inner ring section of the base ring on the ring flange of the Wall lining, which is usually on an approximately 15 mm thick Plaster layer is on, the chimney flue will not  sometimes affected, let alone damaged. The assembly that due to the simple axial structure of the device can easily be done from the front, therefore no priori subject to official approval and can even be obtained from a non-specialist people can be easily carried out. Already existing ne, customary and already built-in wall lining can easily at any time with the stovepipe according to the invention sealing device can be retrofitted.

An embodiment of the invention is particularly preferred according to stovepipe sealing device, in which another ring shaped sealing element between the inner ring portion of the Base ring and the ring flange of the wall lining provided is. So that the sealing effect of the overall device is still further increased because of the escape of gas or soot particles from the chimney or sucking in secondary air into the chimney between the inner ring portion of the base ring and the Ring flange of the wall lining is prevented with certainty.

In an advantageous development of this embodiment the further sealing element is a heat-resistant, fire solid flat gasket, e.g. made of Durobest.

During conventional firing systems in previous years operating at high temperatures between 240 and 350 ° C, has become more and more never in the last ten years the temperature control technology is spread, at the at least in the start-up area of the heating process temperatures between between 30 and 40 ° C in the chimney section charged with exhaust gas to rule. This results in increased condensation in the chimney water formation on. With conventional stovepipe connections condensation can escape from the chimney Connection area of the stovepipe not prevented at all  will. Also the one discussed above from DE-PS 17 51 035 known, at least gas and soot-tight device can Do not reliably prevent condensation from escaping, as the asbestos cord used there is not waterproof. To one adequate sealing function also against the leakage of Condensed water in low-temperature combustion systems ensure are therefore one of the most preferred Embodiment of the stovepipe sealing device according to the invention tion, the sealing elements used are impermeable to water.

In a further preferred embodiment, minde at least one of the sealing elements is a hollow hose ring a heat-resistant, elastomeric material. Such a hollow Hose ring is particularly easy to compress axially and deviates with a large amplitude in the radial direction tion from the side, so that a narrow and large area nestle the sealing ring to the circumference of the stovepipe is accomplished.

Particularly good heat resistance with simultaneous elasticity offer sealing elements made of silicone.

In a particularly preferred embodiment of the invention The stovepipe sealing device according to the invention have the base ring and the clamping ring radially outside on the respective inner Then project one section of the ring away from the chimney de level on. This gives the tensioning device on the one hand high mechanical dimensional stability, on the other hand it will Sealing element at the beginning of the step in a defined position held.

In an advantageous development of this embodiment the step is essentially perpendicular to  respective inner ring section. This makes the seal element safely on a radial dodge ge prevents and can therefore single when axially pressing together Dodge radially inwards, so that a particularly good Sealing effect is achieved.

In a further embodiment it is provided that the Base ring and the tension ring on their radially outer parts each run parallel to the inner ring section have the outer ring portion and that the clamping screw engage in the outer ring sections. At the Monta ge of the sealing device according to the invention can thus Handling the tensioning screws in an appropriate radial Distance from the stovepipe is unimpeded.

In embodiments, the base ring and / or the Clamping ring made of sheet metal. Especially when used the use of materials and the weight of thin sheet metal the stove pipe sealing device according to the invention is very low held.

In other embodiments, the base ring and / or the clamping ring of one or more, preferably in the form cast, heat-resistant plastic layer (s) be that are inexpensive to manufacture and inexpensive.

Base and / or clamping ring can also be made of ceramic mate rial, which is particularly heat-resistant and form is stable.

The clamping screws can be invented in embodiments inventive stovepipe sealing device simple sheet metal screw be ben.  

In other embodiments, the clamping screws are through Holes in the base ring and threads penetrating the clamping ring bolts that are tightened with nuts from behind on the chimney facing side of the base ring can be screwed. Especially In this case, a combination with execution is favorable shapes, in which a step in the base and clamping ring as well in each case a radially outer ring section is provided to which the clamping screws are then attached and for mounting the Nuts can be easily reached behind.

In somewhat more comfortable embodiments, the instep screw through a hole in the clamping ring into a parallel Thread in the green running along the axis of the stovepipe engaging threaded screws. This is a special one ders simple bracing of the device by screwing of the threaded screws axially from the front without reaching behind the clamping device possible.

An embodiment of the invention is particularly preferred according to the stovepipe sealing device, in which at least three, preferably symmetrical over the circumference of the instep distributed tensioning screws are provided. This will on the one hand, the sealing element is not asymmetrical on one side squeezed so that a uniform sealing effect around the ge entire circumference of the stovepipe is guaranteed, others on the other hand, the material of the base and clamping ring can be special ders thin, chosen for example with 1.5 mm sheet thickness because there are several pressure points when bracing and the tension pressure is not due to the shape alone rigidity of the clamping ring of one or two chips must be passed on.  

An embodiment of the Er is very particularly preferred in which the base ring with drawn rivets ("pop rivets") is attached to the ring flange of the wall lining. The ring flange head behind such a pull rivet is particularly flat in the axial direction, so that it only at a shallow depth, usually around 15 mm thick lime or gypsum plaster (on which the ring flange on lies) penetrates. A touch of the chimney cheek through the rivet is therefore avoided, damage to the chimney stone absolutely excluded, because the axial depth of the Rivet head is usually only about 4 mm.

To avoid inadmissible drilling into the chimney flue in another embodiment, the green by means of short self-tapping screws on the ring flange of the wall be attached to the lining. If the protruding piece of Tapping screws should have a greater axial length than the existing lime or gypsum plaster, so the sheet can screws are also sawn off at the tip.

In other embodiments of the invention, the green is glued to the ring flange of the wall lining. The Ver gluing must of course with a heat resistant Adhesives are made. Since usually no major axia len forces act on the stovepipe, which a pulling out the same would cause from the wall lining, the Ver Adhesion can also be designed so that it can be used axial tensile forces is also releasable.

Finally, in a further embodiment, the Basic ring also ver with the ring flange of the wall lining be welded. In this case form the sealing device and the wall lining is a unit that is completely built in  a chimney access opening is supplied.

Further advantages of the invention result from the following ing detailed description and the attached drawing nung. Likewise, the above and those still further listed features according to the invention individually for yourself or several in any combination Find use. The ones shown and described Embodiments are not meant to be a final list understand, but rather have only exemplary Character for the description of the invention. Show it:

Figure 1 is a schematic sectional view of the inventive device in the built to stand in a section through a horizontal plane.

Figure 2a is a furnace tube sealing device according to the invention schematically in a plan view in the axial direction.

FIG. 2b shows the apparatus of Figure 2a in axial section. and

Fig. 2c shows the device of Fig. 2b with axially compressed base and clamping ring.

In Fig. 1, the connection region of a stovepipe 10 to a chimney chamber 20 surrounded by a wall 19 is shown schematically in a horizontal sectional plane. In a zy-cylindrical chimney access opening 18 , a wall lining 15 with beads 16 is fastened in a substantially cylindrical chimney sleeve 14 of the wall lining 15 in a non-slip manner with the aid of cement mortar 17 . At the end of the chimney sleeve 14 facing away from the chimney, an annular flange 13 is provided, which is supported on an approximately 15 mm thick lime or gypsum plaster layer 12 .

In order to hold the stovepipe 10 inserted into the chimney sleeve 14 of the wall lining 15 along its axis A on the one hand in a non-slip manner in the wall lining 15 , and on the other hand to effect or seal off any smoke or soot particles penetrating from the chimney chamber 20 between the stovepipe 10 and the wall lining 15 To prevent the ingress of secondary air into the chimney chamber 20 , a sealing device constructed from a base ring 1 , a sealing element 2 and a clamping ring 3 is fastened to the ring flange 13 with the aid of flat-headed rivets 9 .

On the radially innermost part, which is directly adjacent to the stovepipe 10 , the base ring 1 has an inner ring section 5 and the clamping ring 3 an inner Ringab section 6 . Between these two inner Ringabschnit th 5 , 6 , the sealing element 2 , in the example shown a hollow ring made of elastomeric material, squeezed together by tightening the clamping ring 3 with respect to the base ring 1 , whereby it at least partially evades radially inward towards the outer shell of the stovepipe 10 and surrounds it with sealing and non-slip.

The bracing of the clamping ring 3 with the base ring 1 is by tightening nuts 22 against screws 21 be acts, the screws 21 enforce an outer ring portion 7 of the base ring 1 and an outer ring portion 8 of the clamping ring 3 . The screws 21 are preferably distributed symmetrically around the circumference of the rings. In order to prevent evacuation of the sealing element 2 radially outwards and to define its position relative to the base ring 1 and the clamping ring 3 , sections between the inner ring 5 , 6 and the outer ring sections 7 , 8 are one away from the chimney 20 extending stage 23 , 24 provided.

FIGS. 2a to 2c show another embodiment of the furnace tube sealing device according to the invention, in which the Stu fen 23 ', 24' is not inclined, but substantially perpendicular. This keeps the cut between the inner Ringab 5 'and 6 ' arranged sealing element 2 'exactly in its position. The bracing is in turn hen by tightening one on a thread of a threaded bolt 21 'cause the nut 22 ', which the outer ring sections 7 'and 8 ' enforce. The threaded bolts 21 'are arranged symmetrically on a circumference around the axis A' to cause a uniform distribution of the pressing forces.

Another special feature of the embodiment shown in Fig. 2a to Fig. 2c is that the inner ring section 5 'does not sit directly on the ring flange 13 ', but by this through a flat seal 25 'in the form of egg nes also around the axis A 'revolving annulus is separated. This results in an even better sealing effect, in particular also against condensation running out of the chimney chamber when the device is used in conjunction with low-temperature firing systems.

While Fig. 2a shows a plan view of the device according to the invention in the direction of the axis A ', in Fig. 2b a schematic, the axis A' containing sectional representation of the device according to Fig. 2a is shown, but no axial pressure on the sealing element 2 'is exercised. In Fig. 2c, finally, the clamping ring against the base ring by tightening the nut 22 'on the screw bolt 21 ' clamped, so that the sealing element 2 'is squeezed in the axial direction ge and therefore evades radially inward, where in the operating state in Fig . 2a to 2c would be positioned not shown furnace tube which would thereby receive a circumferential seal.

Claims (20)

1. furnace tube sealing device for holding a furnace tube (10) in a iw cylindrical chimney sleeve (14) ei nes a chimney access opening (18) lining the wall is inserted or pushed through the feed (15), the wall lining (15) and for sealing the furnace tube ( 10 ) against over the wall lining ( 15 ), the sealing device being attachable to the wall lining ( 15 ) and an annular clamping device surrounding the furnace tube ( 10 ) circumferentially for receiving an annular sealing element ( 2 , 2 ') and bracing against the furnace tube ( 10 ), characterized in that the clamping device comprises a base ring ( 1 ) and a clamping ring ( 3 ) which, at least on their radially inner part adjacent to the stovepipe ( 10 ), each have an iw perpendicular to the axis (A, A ′) of the stovepipe ( 10 ) extending inner ring portion ( 5 , 6 ; 5 ', 6 '), the inner ring portion ( 5 ; 5 ') of the base ring ( 1 ) on an iw perpendicularly vo n the chimney sleeve ( 14 ) projecting ring flange ( 13 , 13 ') lies flat and can be fastened to it, that between the inner ring section ( 5 ; 5 ') of the base ring ( 1 ) and the inner ring portion ( 6 ; 6 ') of the clamping ring ( 3 ) the annular sealing element ( 2 ; 2 ') is arranged, which consists of heat-resistant, elastomeric material, and that the clamping device clamping screws ( 21 , 22 ; 21 ', 22 ') with which the clamping ring ( 3 ) can be clamped in the direction of the axis (A, A ') of the stovepipe ( 10 ) with the base ring ( 1 ), the sealing element ( 2 ; 2 ') is crushed axially and, due to its elasticity, at least partially evades radially inwards towards the stovepipe ( 10 ). 2. Device according to claim 1, characterized in that a further annular sealing element ( 25 ') between the inner ring portion ( 5 ') of the base ring and the ring flange ( 13 ') of the wall lining is provided. 3. Apparatus according to claim 2, characterized in that the further sealing element ( 25 ') is a heat-resistant flat gasket. 4. Device according to one of the preceding claims, characterized in that the sealing element or elements ( 2 ; 2 ', 25 ') are impermeable to water. 5. Device according to one of the preceding claims, characterized in that at least one of the sealing elements ( 2 ; 2 ', 25 ') is a hollow hose ring made of a heat-resistant, elastomeric material. 6. Device according to one of the preceding claims, characterized in that at least one of the sealing elements ( 2 ; 2 ', 25 ') consists of silicone. 7. Device according to one of the preceding claims, characterized in that the base ring ( 1 ) and the clamping ring ( 2 ) radially on the outside of the respective inner ring portion ( 5 , 6 ; 5 ', 6 ') then one each from the chimney ( 20th ) protruding step ( 23 , 24 ; 23 ′, 24 ′) on. 8. The device according to claim 7, characterized in that the step ( 23 ', 24 ') each iw perpendicular to the respective inner ring portion ( 5 ', 6 '). 9. Device according to one of the preceding claims, characterized in that the base ring ( 1 ) and the clamping ring ( 3 ) on their radially outer parts a respective parallel to the inner ring portion extending outer ring portion ( 7 , 8 ; 7 ', 8 ' ), and that the clamping screws ( 21 , 22 ; 21 ', 22 ') engage in the outer ring sections ( 7 , 8 ; 7 ', 8 '). 10. Device according to one of claims 1 to 9, characterized in that the base ring ( 1 ) and / or the clamping ring ( 3 ) is made of sheet metal. 11. Device according to one of claims 1 to 9, characterized in that the base ring ( 1 ) and / or the clamping ring ( 3 ) is constructed from one or more, preferably cast in the form of heat-resistant plastic layers. 12. The device according to one of claims 1 to 9, characterized in that the base ring ( 1 ) and / or the clamping ring ( 3 ) is constructed from ceramic material. 13. The device according to one of claims 1 to 12, characterized characterized in that the tensioning screws are self-tapping are. 14. Device according to one of claims 1 to 12, characterized in that the clamping screws through holes in the base ring ( 1 ) and in the clamping ring ( 3 ) are penetrating threaded bolts ( 21 ; 21 ') with nuts ( 22 ; 22 ') the side of the base ring ( 1 ) facing the chimney ( 20 ) can be screwed. 15. Device according to one of claims 1 to 12, characterized in that the clamping screws engaging through a hole in the clamping ring ( 3 ) in a parallel to the axis (A, A ') of the stovepipe ( 10 ) thread in the base ring ( 1 ) Are threaded screws. 16. Device according to one of the preceding claims, characterized in that at least three, preferably symmetrically distributed over the circumferential circle of the clamping ring ( 3 ) clamping screws are provided. 17. Device according to one of claims 1 to 16, characterized in that the base ring ( 1 ) by means of rivets ( 9 ) on the ring flange ( 13 ) of the wall lining ( 15 ) is attached. 18. Device according to one of claims 1 to 16, characterized in that the base ring ( 1 ) is fastened by means of short self-tapping screws on the ring flange ( 13 ; 13 ') of the wall lining ( 15 ). 19. Device according to one of claims 1 to 16, characterized in that the base ring ( 1 ) with the ring flange ( 13 ; 13 ') of the wall lining ( 15 ) is glued. 20. Device according to one of claims 1 to 16, characterized in that the base ring ( 1 ) with the ring flange ( 13 ; 13 ') of the wall lining ( 15 ) is welded.