DE1079224B - Cooling arrangement for metallic electrical discharge vessels with a metallic cooling jacket arranged on the outside of the discharge vessel and a method for producing such a cooling arrangement - Google Patents

Description

GERMAN

Copper cooling coils are used to cool converter discharge vessels. These are normally connected to the discharge vessel by soft soldering.

In the course of rationalization, cheaper materials and the copper cooling coil have been proposed replaced by an iron cooling coil. This is not soldered on, but in the hot-dip galvanizing process connected to the discharge vessel. However, manufacturing difficulties arise here, which consist in the cooling pipe coil or coil made of steel in this way and attached to the cylindrical boiler wall to be attached in such a way that the gap between the cooling pipe coil and the boiler wall is as close as possible to all Places small and expediently not larger than 0.1 mm, so that the zinc is hot-dip galvanized sticks between the cooling pipe coil and the boiler wall. This deficiency is essentially due to it attributed to the fact that the cooling tube coil has a slightly larger diameter than the discharge vessel has to be manufactured and naturally more resilient because of the steel used than a copper snake. Attempts have therefore also been made to make the cooling tube helix with a slightly smaller diameter produce than it has the discharge vessel. This results in spite of the suspension of the Cooling tube coil difficulties due to the friction between cooling tube coil and discharge vessel wall, to apply the cooling tube coil to the discharge vessel.

Furthermore, there are cooling arrangements for metallic electrical discharge vessels with the outside of the discharge vessel arranged metallic cooling jacket known, which consists of a cylindrically bent sheet metal and is provided with protruding, helically extending beads around the discharge vessel. at It is extremely difficult for these discharge vessels to dimensionally maintain such a corrugated iron jacket to manufacture, d. H. manufacture so that its projecting parts at all points exactly on the discharge vessel issue. When fastening such a jacket by seam welding, it has become in shown in practice that in those places where the seam weld must press the cooling jacket sheet against the discharge vessel and at this point welded, considerable material stresses occur, which can lead to the fact that at these points The welded connection between the corrugated iron jacket and the discharge vessel tears, causing damage to the Discharge vessel arise, in particular leaks can occur.

In addition, since a short circuit between the individual cooling water paths or windings can occur, see above results in uneven cooling on the circumference cooling arrangement for metallic

electrical discharge vessels

with the outside of the discharge vessel

arranged metallic cooling jacket

and method of manufacture

such a cooling arrangement

Applicant:

Siemens-Schuckertwerke

Corporation,

Berlin and Erlangen,

Erlangen, Werner-von-Siemens-Str. 50

Georg Engelhardt, Berlin-Siemensstadt,
has been named as the inventor

of the discharge vessel, as a result of which the work of the converter is impaired.

These disadvantages are avoided according to the invention in that the gap between the beads and the surface of the discharge vessel is soldered by zinc in a manner known per se.

According to a further development of the invention, it can be advantageous if the surfaces of the discharge vessel and the cooling jacket are galvanized beforehand, because the galvanizing means that the Gap between the beads and the surface of the discharge vessel in the zinc bath is facilitated.

In addition, it can be advantageous according to a development of the invention that the cooling jacket from is composed of two parts, one part of which covers the bottom surface of the discharge vessel, the other part encloses the cylindrical part of the discharge vessel.

When producing such a cooling arrangement, the gap between the helical bead and the vacuum vessel after covering the cooling jacket on the vacuum vessel by pressing the The bead can be brought down to the necessary small size with a roller on the vacuum vessel. One then A gap that may still remain between the coils of the cooling jacket and that at individual points The discharge vessel is closed by immersing the vacuum vessel and the cooling jacket in a zinc bath will. After removing the parts

from the zinc bath and after it has cooled down, the gap is closed. The cooling jacket can be made copper-clad iron or steel sheet exist and be arranged such that the copper side from the coolant is rinsed. This prevents corrosion of the cooling jacket, which in this way is a Maintains longer lifespan. The technical advantage achieved by the invention consists essentially in that the cooling jacket with the protruding, helically extending around the discharge vessel Corrugations can be made dimensionally much more easily than those in the form of a helix around the discharge vessel running cooling pipe coil, because this pipe has a constant tendency to spring.

A special feature of the invention is that the galvanizing of the surface of the discharge vessel and closing the spaces between the beads and the surface of the discharge vessel can be carried out in one operation.

Two exemplary embodiments of converter discharge vessels according to the invention are shown in FIG Figure shown schematically in cross section. The figure shows a converter discharge vessel on the left a cooling jacket, which consists of a single piece, and on the right a converter discharge vessel with a cooling jacket, which consists of two parts, namely a cylindrical side part and a conical one Bottom part consists.

The left discharge vessel 1 is surrounded by a cooling jacket 2 which has preprinted beads 3. A pipe socket 4 is provided at the bottom and a pipe socket 5 at the top for connecting the coolant line. After the cooling jacket has been pushed onto the converter discharge vessel, the cooling jacket is switched on a few places on the discharge vessel by attaching it, e.g. B. by a few weld points attached. When galvanizing the vessel provided with the cooling jacket, the liquid zinc when immersed in the Parts flow into and out of the bath through pipe sockets 4 and 5. The galvanizing does not extend only on the beads, but also on the surfaces of the discharge vessel outside and the cooling jacket Inside.

On the right-hand side of the figure is a discharge vessel 1 with a cooling jacket made up of parts 6 and 7 shown. First, the discharge vessel with the part 7 after prior attachment by spot welding connected by having it with its conical bottom together with part 7 in immersed in the zinc bath. These parts adhere after removing them from the zinc bath and after cooling down firmly to one another, then the part 6 is pushed onto the discharge vessel and spotted.

Then the discharge vessel is turned over and the upper opening into the zinc bath up to Overlap point 8 of parts 6 and 7 including immersed. The point of overlap is then also closed by the galvanizing. The chronological order the application of the cooling jacket parts 6 and 7 can also be reversed.

Claims (5)

Patent claims: 1. Cooling arrangement for metallic electrical discharge vessels with the outside of the discharge vessel arranged metallic cooling jacket, which consists of a cylindrically bent sheet metal and is provided with protruding, helical beads running around the discharge vessel, characterized in that the gap between the beads (3) and the surface of the discharge vessel (1) by zinc in a manner known per se is soldered. 2. Cooling arrangement according to claim 1, characterized in that the discharge vessel (1) and the cooling jacket (2) are galvanized beforehand. 3. Cooling arrangement according to claim 1, characterized in that the cooling jacket consists of two Parts (6 and 7) is composed, of which one part (7) covers the bottom surface of the discharge vessel (1), the other part (6) the enclosing the cylindrical part of the discharge vessel (1). 4. A method for producing a cooling arrangement according to claims 1 to 3, characterized in that that in a manner known per se a cooling jacket provided with pushed-forward beads is slipped over the discharge vessel and that, if necessary, the pressed beads against the Surface of the discharge vessel to be pressed so far that possibly between the pushed forward Crimps and the discharge vessel existing larger column on a for soldering the Gap necessary to be reduced, and that the pushed parts, discharge vessel and cooling jacket, are immersed in a zinc bath for the purpose of soldering the gaps. 5. The method according to claim 4, characterized in that the galvanizing of the surface of the Discharge vessel and the sealing of the spaces between the beads and the surface of the Discharge vessel can be carried out in one operation. Considered publications:
U.S. Patent Nos. 1,978,424, 2,121,579,
137 044. 1 sheet of drawings ® 909 769/443 p. 6 »