DEST008923MA - - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

Registration date: October 23, 1954. Advertised on January 19, 1956

GERMAN PATENT OFFICE

CLASS 13a GROUP 8u

St 8923 Ia /. 13a

and

. Friedrich Fikenscher
. Wilhelm Schreiter, Gummersbach (RhId.)

have been named as inventors

Wall cooling pipes

The invention relates to the abstract and Reforging of raw materials, in particular of Wall cooling pipes in steam boiler furnaces, with the help of so-called double bifurcations.

Pipe bifurcations with two or more branches are already in very many. Cases been used for one-off constrictions or enlargements of a combustion chamber wall to be cooled to follow and, at the same time, to clad these walls as evenly as possible Maintain cooling pipes. Temporary pipe summaries have also been made - as they are aimed for according to the application - carried out with the help of forks, for example Space for wall openings in fireplaces, e.g. B. for pulverized coal burners, secondary air nozzles, Sighthouses etc. to create. So far the procedure has been such that either the im Area of these wall openings, preferably from bottom to top, continuous tubes laterally bent and led past the opening in front of or behind the other continuous pipes became. Another possibility was that the pipe walls under and; above the Wall openings, for example with the help of short pipe collecting or distribution chambers, interrupted.

509 629/57

St 8923 I al13 a

These designs are, however, in part because of the space and the intricate pipe bends very annoying, partly very expensive because of the chambers required. the the obvious reduction in the cooling pipes in the area to the side of the wall openings was through simple summary by means of forks for the reason not feasible because above the summary, d. H. after the fork, the distribution of the coolant in most Cases were so uneven that because of insufficient cooling some of the subsequent ones Single pipes Pipe overheating and pipe ruptures were inevitable.

According to the invention, it is proposed to enable the temporary pipe merging by means of forks in the one between the two Forks running collecting pipe stretch flat To install sheet metal strips as partitions, which the coolant paths of the combined individual pipes separate from each other also during the summary. These partitions must of course be of run through the summarizing fork to the separating fork and be sufficiently close to the

Make contact with the outer walls of the pipe or fork. The partitions must therefore in particular on both sides extend to the inner vertices of the forks. For constructive execution, it appears to be advantageous to connect the partition walls to the outer pipe wall by section or spot welding, since a completely pressure-tight design is not necessary.

It is also possible to open the partition walls after installation from the outside with the help of so-called Establish plug welds and connect them to the outer wall of the pipe, with the plug welds through small-diameter holes drilled into the outer wall of the pipe (preferably beforehand).

Since the Rohrsammeistücke must be bent between the two forks, so the Partition walls or sheet metal strips after installation in the pipes advantageously together with the Collecting tube piece bent together so that they then represent approximately cylindrical surfaces, their Surface lines run parallel to the respective pipe bending axis.

Basically, the sequence of the work steps hole drilling, inserting sheet metal, tube bending be divorced. In the case of sharp bends and other difficult conditions, however, it seems appropriate to first to drill the holes, insert the sheet metal and with light tack welds to be fixed from the outside through the holes in the pipe. After that, the pipe is bent and finally the plug welding is final and durable. An occasional scratching of the tack weld during the bending is then irrelevant.

Under certain circumstances, the finished bent and welded pipes can also be known per se Way, stress-free annealed or even normalized.

It goes without saying that the pipe collars also have larger or smaller diameters can have than the associated single tubes.

In the drawing, the previous versions and those proposed with the invention are indicated. Ask here

Fig. Ι and 2 schematically the usual Cooling pipe arrangements in the view of the combustion chamber wall,

Fig. 3 shows the same view of the pipe arrangement according to the invention;

Fig. 4, 5 and 6 show design details of a straight double fork piece, namely Fig. 4 in the axial longitudinal section parallel to the plane of the furnace wall, Fig. 5 the associated cross-section and Fig. 6 shows the same on an enlarged scale. · · · ■

The following apply to the drawings, which can already be understood from the illustration and description Designations: 1 the wall opening or the wall surface to be kept free of the cooling pipes, 2 the pipes tapering from below towards the wall opening 1, 3 the laterally with or without each Bend at. the wall opening 1 running past the cooling pipes, 4 the lower fork pieces for the combination of the pipes 2 coming from below, 5 the pipe collars (stem or stem pipes) of the forks, 6 one arranged above the wall opening 1 Pipe distribution chamber for the cooling pipe element attached above the wall opening, 7 die over the wall opening 1 upwardly running cooling tubes, 8 the upper fork pieces for re-forking the pipe collecting pieces 5, 9 the partition wall fixed in the pipe collecting piece 5, 10 the Plug welding for fastening the partition 9 in the pipe assembly 5.

Claims (4)

Patent claims: 1. Summary and re-allocation two or more wall cooling pipes, in particular in steam boiler furnaces, characterized in that, that to maintain the coolant distribution in. between the two forks running manifold pieces are flat metal strips that extend up to the inner vertices the forks extend, are arranged. 2. Double fork piece according to claim 1, characterized in that the preferably made of a metal strip existing partition wall in the manifold section not installed pressure-tight, but is only welded to the pipe wall in sections or at points. 3. Double fork according to claim 2, characterized in that the partition by means of plug welding made from the outside through bores in the pipe wall connected to the pipe. 4. A method for producing the double fork pieces according to claim 3, characterized in that that the partition wall is perpendicular to the level of the fork pieces or the later to be 629/57 St8923Ia / 13a The leading bends are inserted into the straight manifold section pre-drilled for the welds and is fixed therein by light tack welding that subsequently the pipe collecting piece bent and then the plug welding with remelting of the tack welds are made pressure-resistant. Cited publications: German patent application B 9680 Ia / 13 a. 1 sheet of drawings