DE543275C - Induction melting furnace - Google Patents

Description

The invention relates to an induction melting furnace, the one on the crucible has at least one handle-like one with an iron core a transformer chained heating tube is connected, the mouths lie at different levels.

The invention has the task of providing the most favorable cooling conditions for the excitation winding of the transformer and the spread between the excitation winding and the secondary winding, to press down the melt filling the handle tube as far as possible.

According to the invention, the excitation winding of the transformer core consists of disc coils, the laterally and essentially; are arranged parallel to the plane of the handle. The lower part of the crucible is expediently given a smaller cross section than the upper part Part, in particular the lower part, is drawn in perpendicular to the plane of the handle Placing the disc coils on the sides of the handle makes it easier.

It has been proposed to use other types of ovens, e.g. B. in the so-called Ring type of induction furnace, in which the entire crucible consists of a channel-like Ring consists of disc coils for the excitation arranged on the side of the ring of the transformer. But apart from the fact that this is a If the furnace is of a completely different type, the disc coils are here with the same crucible content Juxtaposed much larger heat-radiating surfaces than the one on the left Invention.

The invention will be explained in more detail with reference to the drawing.

Fig. Ι shows schematically an induction furnace from the side,

Fig. 2 shows the furnace seen from above, partly in section.

On the sides of the crucible 1 with the melting material 2 are the handle-like heating pipes 3 connected. The cross section of the crucible is not the same in all places, he is smaller on the lower part 4 than on the upper part. However, the cross-sections can also have any other shape, depending on the way in which the circulation of the molten material is regulated target.

The lower mouth 6 of the tube 3 is in the vicinity of the crucible bottom 7, the upper mouth S connected approximately in the middle of the crucible sides. With the handle 3 is the Transformer core 9 made of laminated iron chained. Endures the disc coils 10, 11. which form the excitation winding of the transformer and laterally and parallel to the handle level are arranged. The confiscation of the go

*) The patent seeker stated as the inventor:

Johann Schnepf in Nuremberg ·.

Claims (5)

Cross-section perpendicular to the plane of the handle 3 (Fig. 2! facilitates the accommodation of the disc coil ¹ !! ίο, 11. This arrangement also has the advantage that the excitation winding can be easily cooled and is easily accessible. The crucible ι is covered by a circular cover 12, over the cutout a hood or the like is put on. The movement of the material to be melted takes place in such a way that the heavier, colder masses penetrate through the lower mouths 6 of the heating pipes and the lighter ones are warmer Masses emerge through the upper mouths 8. This creates the melt material cycle indicated by the arrows 13. Also, the masses located directly below the surface of the melt material will be through the swirling movement into the circle ao run drawn in. "If the furnace is connected to a single-phase network, so the disc coils 10, 11 can be connected in parallel or in series in any way will. If three-phase current is available, the two filament transformers are appropriately connected in Scottish circuit. With multiphase electricity however, a special filament transformer can also be provided for each phase. As a rule, the heating tubes 3 and the crucible 1 are not made from one piece make, but expediently the pipes in the known transformer tanks Connect to the crucible nozzle by means of flanges. If several handle-like tubes are connected to the crucible, when using of single-phase current, the transformer cores are combined in a common ring-shaped core, the through the handle openings; is performed and encloses the lower part of the crucible. The current density in the heating pipes and the cross-section of these pipes is selected in such a way that that constrictions of the melt strand under the action of electrodynamic Forces cannot disturb the cycle caused by the difference in specific weights. Ρλ τ ic ν τ λ xspr ü cue: ι. Induction melting furnace with at least one connected to the crucible, with the iron core of a transformer chained heating pipe, its connection points operationally different high, characterized in that the excitation winding of the transformer core (9) consists of disc coils (10, 11), which laterally and essentially are arranged parallel to the plane of the handle. .2. Induction melting furnace according to claim i, characterized in that the lower part (4) of the crucible (1) has a smaller cross-section than the upper part (5), in particular that the cross section of the lower part (4) perpendicular to the 7 " Level of the handle (3) is drawn in to accommodate the disc coils (1.0, 11) on the sides of the handle (3) to make it easier. 3. Induction melting furnace for connection to multi-phase networks according to claim i, characterized by a number of handle-like, Heating tubes interlinked with transformer cores. 4. Induction melting furnace according to claim ι with several on the crucible circumference distributed handle-like heating tubes for single-phase alternating current, both ends opening into the crucible, characterized in that a common, ring-shaped enclosing the crucible Transformer core is put through the handle. » 5. induction melting furnace according to claim i, characterized in that the Handle tubes in the manner known from transformer tanks with flanges Nozzles of the crucible are connected. 1 sheet of drawings nrnnucKT iv nra