CZ161494A3 - Multiple-part composable chimney facility - Google Patents

Abstract

The invention relates to a chimney arrangement which is constructed with a plurality of parts and is composed of an outer shell, of an inner shell formed by inner pipes, and, if appropriate, of an insulating layer introduced between outer shell and inner pipe, having in each case one connection piece which is formed at the lower end of the upper inner pipe and at the upper end of the following lower inner pipe, with the result that each inner pipe (1; 10, 11) exhibits at least one connection piece (14, 16) with an outer thread (6; 14, 16). <IMAGE>

Description

Multi-piece assembled chimney device - - - ~

Technical field. - f

The invention relates to a multi-part assembled chimney device comprising an outer layer, an inner layer formed by inner tubes and optionally an insulating layer arranged between the outer layer and the inner tube, wherein at the lower end of the upper inner tube and at the upper end of the lower inner the connecting end is formed.

BACKGROUND OF THE INVENTION

The multi-part assembled chimney devices of the above-mentioned type are known per se. The connecting ends of the inner tubes of such chimney devices have tongues and grooves so that the adjacent inner tubes are connected by a tongue-groove connection. A sealing tunnel is applied to the tongue and groove joint to achieve the required tightness. Such chimney devices are suitable for vacuum chimneys, which need not necessarily be tight.

Further, multi-piece assembled chimney devices of the type described above are known, in which the inner tubes are also connected by tongue-and-groove joint and, in addition, the outer steel sleeve to the inner rubber part, so that the joints are tight and flue gas leaks between the connecting ends. Such pressurized chimneys are generally suitable for temperatures below 100 ° C.

Inner layer resp. the inner pipe of the multi-piece assembled chimney device is formed by individual ceramic pipes, which may have different lengths and diameters. The inner tubes are connected by tongue and groove connections. Sealing between tongue and groove is performed during assembly with sealant. Any such connection constitutes a weak point of the inner layer of the chimney device, since the resistance of the sealant to temperature and acid is not guaranteed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a multi-piece assembled chimney device suitable for both pressurized chimneys and vacuum chimneys.

SUMMARY OF THE INVENTION

These drawbacks are overcome by a multi-piece assembled chimney device consisting of an outer layer, an inner layer formed by inner tubes and optionally an insulating layer arranged between the outer layer and the inner tube, the lower end of the upper inner tube and the lower end of the lower inner tube. The connecting end is formed in that each inner tube has at least one connecting end with an external thread.

According to a preferred embodiment, each lower connecting end of each inner pipe has an internal thread and each upper connecting end has an external thread.

According to a further preferred embodiment, each inner tube has an external thread at both the upper and the lower connecting end, the two adjacent inner tubes being connected by a sleeve at the connection point.

According to another preferred embodiment, the female thread is cut into a sleeve which; arranged at the upper connecting end of the inner tube.

According to the invention, inner tubes can be joined without the need for a sealant or similar.

Further advantageous embodiments of the invention are apparent from the dependent claims.

The solution according to the invention removes the drawbacks of the known solutions, that is, according to one embodiment, threads are formed in the ceramic body of the inner tube, at one end on the outside and at the other end on the inside. Thus, the individual inner tubes can be screwed together by means of threads, without the need for additional sealing material such as sealant.

According to a further preferred embodiment of the invention, a sliding means is used to facilitate the screwing of the inner tubes.

The use of internal and external threads also ensures adequate sealing of the flue gas also in pressurized chimneys, whereby the joints are so tight that they immediately meet the relevant standards and regulations. According to the invention, the entire inner layer of the chimney consists of only one material.

Overview of the drawings

In the following, preferred embodiments of the inner tube of a multi-piece assembled chimney device will be described with reference to the drawings. The individual figures in the drawings show:

FIG. 1 is a partial cross-sectional view of an inner tube according to one preferred embodiment having a lower male threaded connecting end and an upper female threaded connecting end.

FIG. 2 is a partial cross-sectional view of another preferred embodiment of the inner tube in the region of the connection of two adjacent inner tubes.

FIG. 3 is an enlarged cross-sectional view of another preferred embodiment of contact surfaces of adjacent inner tubes.

-3 Examples of embodiments of the invention

The inner tube 1 according to FIG. 1 is made of a ceramic body which is pressed and is in a wet state after leaving the press. In the wet state, the shard or preform has a moisture content of about 17%, while after drying in a drying chamber the moisture is reduced to 1% or less. Drying is usually followed by firing.

According to the invention, the inner tube 1 is provided with a sleeve 2 arranged at the upper connecting end, in which the internal thread 4 is cut with a selected pitch either in the wet state or also after the workpiece has been fired. An external thread 6 corresponding to the internal thread 4 is cut at the lower connecting end of the pipe 1. The cutting is also performed either in the wet state of the blank or after the inner pipe has been fired.

The number of turns of the external thread 6 at the lower coupling end may be greater than the number of turns of the internal thread 4. The thread cutting may be performed by pressing the corresponding pulley or by grinding or bending on separate machines.

It is clear from the above that two pipes of the type shown in FIG. 1 are joined such that, for example, the male threaded end 6 is screwed into the female threaded sleeve 4.

Referring now to FIG. 2, a further exemplary embodiment will be described. Giant. 2 shows two successive inner tubes 10, 11 which are connected together in the region of their connecting ends 14. 16. FIG. 2 shows the lower connecting end 14 of the inner tube 10 and the upper connecting end 16 of the inner tube 11, which is below.

In the region of the connecting ends 14, 16, the inner tubes 10, 11 are provided with identical external threads 17, 18. To connect the two inner tubes 10, 11, a sleeve 19 is provided with an internal thread 20 which corresponds to the external threads 17. 18.

In the embodiment of FIG. 2, the inner tubes 10, 11 have flat faces between which a gap may be left, which may be filled with a circular seal, although this is not shown in FIG. 2.

The number of elevations of the threads 17, 11, i.e. the number of elevations of the adjoining external threads is preferably greater than the number of elevations of the internal thread in the sleeve 19.

The sleeve 19 can be formed of the same material as the inner tube 10 or 11, or it can also be made of plastic.

The embodiment of FIG. 2 differs from the embodiment of FIG. 1 in that a loose sleeve 19 is used in contrast to the extruded sleeve provided at the upper connecting end of the embodiment of FIG. 1.

FIG. 3 shows a detail of a section in the region of the sleeve 19 and FIG. in the region of the connection between two adjacent inner tubes. In this embodiment, the end faces 22, 23, i.e. the lower end face 22 of the inner tube 10 and the upper end face of the inner tube 11, respectively, are designed as conical, thereby preventing condensate from flowing down the inner surface of the tubes. 10, 11, out through the mating surfaces 22. 23.

Alternatively, the seal may be omitted with the additional O-ring as described in the exemplary embodiment of FIG. 2.

Claims (13)

A multi-piece assembled chimney device comprising an outer layer, an inner layer formed by inner tubes and optionally an insulating layer arranged between the outer layer and the inner tube, wherein at the lower end of the upper inner tube and at the upper end of the subsequent lower inner tube a connecting end is provided, characterized in that each inner tube (1, 10, 11) has at least one connecting end (14, 16) with an external thread (6, 14, 16) Chimney device according to claim 1, characterized in that each inner pipe (1) has an outer thread (6) at the lower end and an inner thread (4) at the upper connecting end. Chimney device according to claim 1, characterized in that each inner pipe (10, 11) has an outer thread (17, 18) at the upper and lower connecting ends (14, 16) and two adjacent inner tubes (10, 11) are connected by a sleeve (19) to the inner thread (20). Chimney device according to claim 2, characterized in that each upper connecting end is widened in the form of a sleeve (2) in which an internal thread (4) is formed. Chimney device according to claim 2, characterized in that a sliding means is arranged between the male and female threads (4, 6) of the connected connecting ends. Chimney device according to claim 2, characterized in that the internal and / or external thread (4, 6) is cut into the semi-finished product of the inner tube. Chimney device according to claim 2, characterized in that the internal and / or external thread (4, 6) is cut into the dried and fired inner tube. Chimney device according to claim 3, characterized in that the length of the internal thread (20) in the sleeve (19) is less than or equal to twice the thread length of one connecting end (14, 16). Chimney device according to claim 3, characterized in that between the lining and the lining of the chimney. end faces of adjacent inner tubes ( 10, 11) a sealing ring or the like is provided. -610. Chimney device according to claim 3, characterized in that the end faces of the inner tubes are conical. Chimney device according to claim 3, characterized in that the external threads (17, 18) are cut into the inner tube blank (10, 11). Chimney device according to claim 3, characterized in that the external threads (17, 18) are cut into the dried and fired inner tube (10, 11). Chimney device according to any one of the preceding claims, characterized in that each inner pipe (1, 10, 11) is made of ceramic.