CZ370896A3 - Chimney tube for chimney reconstruction - Google Patents

Description

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BACKGROUND OF THE INVENTION The present invention relates to a chimney tube for reconstructing chimneys from a plurality of tube sections having a conical widened end and a conical tapered end with the same cone angles and which are connectable to each other by sliding the tapered end into the widened end.

BACKGROUND OF THE INVENTION

When reconstructing the chimneys, a chimney tube composed of a plurality of tubular sections is introduced from the upper end of the chimney into the chimney vent, and optionally. provides an insulating material between the introduced chimney tube and the outer tube, also introduced into the chimney vent. The plug-in connection between the conically widened end and the conically widened end must, on the one hand, exert sufficiently high holding forces between the conical widened end and the conically widened end and on the other hand be gas-tight and condensate-tight.

These conditions are met by a known embodiment of the kind described above, described in German Utility Model DE-GM 94 19 304, having cone angles of 0.5 ° to 2 ° and cone-end lengths of at least 60 mm for tube section diameters up to 1000 mm. In the known embodiment, the conical widened end is widened relative to the diameter of the tubular section and thus has larger diameters relative to the diameter of the tubular section. The conical tapered end has smaller diameters than the tubular section.

The production of a particularly tapered cone end is not problem-free, since special tools are required. However, it is not always possible that the cone angle of the conical tapered end exactly matches the cone angle of the conical widened end, so that assembly and operation failures can occur.

The object of the present invention is to simplify the production of the tubular sections while achieving a precise cone formation.

SUMMARY OF THE INVENTION

This object is achieved according to the invention in that the conical tapered end is widened and has larger diameters over the entire length than the tubular section. Thereafter, both the conical widened end and the conical tapered end can be produced by virtually the same tools. Since the extension of the end of the tube can be performed with greater accuracy, it is also ensured that the cone angles of both ends are equal.

In particular, the wall of the tubular section in the transition portion to the conical tapered section may comprise an outwardly rounded edge step. Otherwise, it is sufficient if the diameter of the front opening of the conical tapered end is equal to the diameter of the tubular section. Then, the walls of the tubular section may advantageously comprise an outwardly oriented step with rounded edges in the transition portion to the conical widened end. This step may serve as a stop for the front edge of the conical tapered end.

In a preferred embodiment, the conical widened end in the overlapping region with the inserted conical tapered end comprises an outwardly directed orbiting serrated depression. This serrated indentation serves as an interruption of the capillary or moisture collector for condensates, which cannot then penetrate into the insulating material surrounding the chimney tube.

Preferably, the tubular section is formed from a sheet metal strip whose contact edges are welded together. Preferably, the tubular section comprises a longitudinal weld disposed in the axial direction.

-3Overview of drawings

The invention is explained in more detail in the following description by way of example with reference to the accompanying drawings, in which a single figure shows a longitudinal section through a chimney tube for chimney reconstruction.

DETAILED DESCRIPTION OF THE INVENTION

The chimney for the chimney reconstruction shown in the drawing consists of a chimney for the chimney reconstruction consisting of a plurality of tubular sections interconnected by sliding together, of which only two tubular sections 1, 2 are shown. The tubular sections 1, 2 are formed of stainless steel and are formed from a sheet metal strip which has been shaped into a tubular section, the contact edges of which are welded together by a longitudinal weld extending in the axial direction. These facts are not shown individually in the drawing.

Each tubular section 1 or 2 has a conical widened end 2 and a conical tapered end 4. The cone angles are always identical and are approximately 0.5 ° to 2 °. The length of the conical ends 3, 4 is at least 60 mm for the tube section diameters up to 1000 mm.

As can be seen from the drawing, there is a conical widened section

3. its diameters are greater than the diameter of the tubular sections 1 or 2.

Also, the conical tapered end 4 is widened relative to the tubular sections 1 and 2 and has larger diameters over its length than the tubular sections 1 and 2. The diameter of the front opening 5 of the conical tapered end 4 is shown equal to the diameter of the tubular sections 1 and 2.

The wall of the tubular sections 1 and 2 in the transition section to the conical widened end 3 has a step 6 facing outwards with rounded edges. This step 6 can serve as a stop for the front edge 7 of opening the conical tapered end 4.

Further, the wall of the tubular section 1 or 2 comprises in the transition region to the conical tapered end 4 an outwardly directed step 2 ^with rounded edges. This step 8 occurs when the tapered end 4 extends beyond the diameter of the tube section 1 or 2. ·

In the drawing, it is further shown that the conical widened end 2 is provided with an outwardly directed orbital serrate 9 in the region of overlap with the inserted conical tapered end 4, which serves as a capillary breaker and moisture collector and prevents condensate from entering the insulation not shown chimney tube.

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Claims (7)

Claims of shades a 1. Chimney tube for the reconstruction of chimneys of tube sections (1, 2) having a conical widening more ' 2) having a tapered end (3) and a tapered tapered end (4) with the same angles of k-el2 gelatinity, and which are connectable by sliding the tapered end (4) into the widened end (3), characterized in that the tapered tapered end the end (4) is widened and has larger diameters over its entire length than the tubular section (1, 2). Chimney tube according to claim 1, characterized in that the wall of the tubular section (1, 2) has an outwardly directed rounded edge step (8) in the transition portion to the conical tapered end (4). Chimney tube according to claim 1 or 2, characterized in that the diameter of the front opening (5) of the conical tapered end (4) is equal to the diameter of the tubular section (1, 2). Chimney tube according to at least one of Claims 1 to 3, characterized in that the wall of the tubular section (1, 2) has an outwardly directed step (6) with rounded edges in the transition to the conical widened end (3). Chimney tube according to at least one of Claims 1 to 4, characterized in that the conical widened end (3) comprises an outwardly directed recessing serrated recess (9) in the region of overlap with the inserted conical tapered end (4). Chimney tube according to at least one of Claims 1 to 5, characterized in that each tubular section (1, 2) is formed from a sheet metal strip whose contact edges are welded together. Chimney tube according to claim 6, characterized in that: The 6-tube section (1, 2) comprises a longitudinal weld arranged in the axial direction. -‘TiwVfot-qi,