DE835092C - Corrugated pipe expansion compensator - Google Patents

Description

The invention relates to a corrugated pipe expansion strainer for heat stressed Pipelines, in particular the exhaust pipes of engines; with exhaust gas turbines, at which the corrugated tubular bellows is welded between the flanges of the separate pipes.

Such corrugated pipe expansion bodies have to be sufficiently soft achieve, only a relatively small wall thickness and accordingly make at high Temperature-sensitive elements. In the known devices of this type the incoming line is extended to avoid flow losses and serves as a casing pipe inside the bellows. At the same time, the feed pipe protects the Wellrohrbal.g against direct heat transfer from the hot exhaust gases. Because with the low wall thickness of the bellows, the slightest scaling is a relative A high loss of strength means that any overheating of the bellows must be prevented if this element is to prove itself in continuous operation.

In order to reduce the temperature stress on the corrugated tubular bellows as much as possible, according to the present invention the casing is of a concentric shell surrounded, which contains gas or other heat insulating packing.

In a further advantageous embodiment of the invention are for shielding the heat from the corrugated tube bellows coaxially between the casing and the bellows two intersecting pipe sockets attached.

The drawing is in Figs. I to 4 in the form of longitudinal sections schematic exemplary embodiments of the invention again.

The exhaust gases flow in the direction of the arrow from the rotary piece i through the Feed pipe 2 into the pipe section 3. The pipe sections i and 3 are connected by means of flanges 4 and 5. connected to one another by the corrugated tube bellows 6. The casing 2 is, of the insulating jacket 7, which contains the heat protection agent 8.

In the case of an embodiment according to Fig. 2, instead of the insulating Shell the pipe socket 9 and io, which is located approximately in the middle of the bellows overlap.

It turned out that always the connection points - the bellows to be destroyed with the flanges first; so apparently it comes first and foremost on the thermal protection of these particularly endangered parts of the bellows. One surrounds Therefore, according to the invention, as can be seen in particular from Fig. 3, the ends of the Bellows with a cooling air jacket i i, for example from the retaining wall in the direction indicated by the arrows is traversed.

The advantages of the types of invention according to Fig. 2 and 3 are in a sense combined in the embodiment according to Fig.4. : `1 are in the connecting flanges outside and inside ribs 12 or: 13 attached. The outer ribs 12 conduct heat while the inner ribs 13 ensure protection against excessive thermal radiation.

The corrugated expansion equalizers used up to now often had only a short service life due to destruction of the spring shafts due to overheating, especially at the restraints. A device according to the invention offers the Possibility of significantly lowering the temperature in the suspension body and thus to achieve greater durability of the same. The invention is very constructive easy to use and therefore without any difficulty.

Of course, they can be shown individually in FIGS Measures also in partial combination or in total combination of one and the same Pipe connection are applied.

Claims (4)

PATENT CLAIMS: i. Corrugated pipe expansion compensator for heat-stressed pipes, in particular for the exhaust pipes of engines with exhaust gas turbines, in which the corrugated pipe bellows is welded between the flanges of the separate pipe sections and an extension of one pipe section as a casing through the corrugated bellows protrudes into the other pipe section, characterized in that the casing pipe is surrounded by a concentric jacket containing gas or some other insulating packing (Fig. i). 2. Corrugated expansion equalizer for itself or according to claim i, characterized in that between the casing pipe and the corrugated pipe coaxially to the casing pipe two intersecting, flow-isolating pipe sockets are attached (Fig. 2). 3. Corrugated pipe expansion compensator for itself or according to claims i and 2, characterized in that the spring shafts at the clamping ends of a cooling jacket are surrounded, through which a coolant is passed (Section 3). 4. Corrugated pipe expansion compensator for itself or according to claims i to 3, characterized in that the for connection provided with the corrugated pipe serving flanges of the two pipe sections with cooling fins are (Section 4).