DE1001776B - Pressure glass seal with a reinforcement or pressure ring on the outer metal jacket of the seal, especially for power converter vessels - Google Patents

Description

The invention relates to a pressure glass seal with a reinforcement or pressure ring on the thin-walled outer jacket of the seal, especially for Stromriter vessels.

In the case of pressure glass seals, in particular for converter vessels, it is sometimes necessary that the metal outer jacket of the pressure glass seal has or is made of the smallest possible wall thickness a thin sheet is made. When the melt cools down, e.g. B. during breaks in operation This thin outer jacket is stressed beyond its elastic limit because the metal jacket is more than the glass enclosed by it contracts, so that it is suitable for a pressure glass seal The required pressure can no longer be exerted on the glass, which leads to a deterioration in the vacuum in the discharge vessel means that the bushing is leaking. As a result, you rely on this Outer jacket has a reinforcement ring. It has been shown that when the Ring or the outer jacket on these, in particular also on their contact surfaces, layers of scale caused by the action of atmospheric oxygen, which not only partially reduces the pressure effect of the ring or completely question them and remove the pressure of the ring on the mantle from control, but also Allow air to seep into the discharge vessel so that the vacuum is worsened.

According to the invention, this disadvantage is avoided in that means are provided that the scaling prevent the contact surfaces between the outer jacket and the reinforcement ring. That can z. B. done by the fact that the pressure ring and / or the outer jacket of the pressure glass seal made from scale-free material. Such a material can, for example, be one that is free of scale Stainless steel, i.e. a steel with additions of silicon, chromium and aluminum. According to the Another invention, however, the scale protection can also be achieved by enamel layers on the surfaces to be protected be effected. You can use one layer of enamel, or you can also use several layers of enamel Arrange on top of each other on each surface to be protected. This can also prevent scaling that ring and jacket are connected to one another in the cold rolling process or that one is used for this ensures that the ring and jacket lie snugly against one another without a gap. Finally, you can also use the different Linking funds together. So you can z. B. take scale-free material and still use it provided with a layer of enamel, which would represent the combination of two means. But you can too other combinations, in particular also the combination of more than two agents, less scale Pressure glass seal

with a reinforcement or pressure ring on the outer metal jacket

the meltdown,
especially for converter vessels

Applicant:

Siemens Schuckeftwerke

Corporation,

Berlin and Erlangen,

Erlangen, Werner-von-Siemens-Str. 50

Walter Nehls, Berlin-Spandau,
has been named as the inventor

Select material, enamel layer, cold water process, full concern.

Four exemplary embodiments of pressure glass seals according to the invention are shown in FIGS. 1 to 4 shown schematically, of which the

Fig. 1 the use of scale-free material and the

Fig. 2 shows the use of email, the
Fig. 3 shows the use of the rolling process and Fig. 4 relates to the \ ^r Before Using combined agent. According to FIG. 1, the pressure glass seal consists of an inner conductor, the metal bolt 1, which can be an anode bolt and is passed through the opening 2 in the discharge vessel wall 3. The vessel wall 3 carries a tube 4 which is connected to it at point 5 by welding. The tube 4 is the outer tube of the pressure glass seal. The metal bolt 1 is surrounded by a glass ring 6. The pressure ring 7 is designated. The outer tube 4 and the pressure ring 7 are made of scale-free stainless steel. Instead of the metal bolt 1, a tube can also be used as the inner conductor. The inner conductor is preferably made of a material adapted to the expansion coefficient of the glass. The outer jacket and the pressure ring can be made of scale-free materials with different expansion coefficients. The outer jacket can, for. B. have a coefficient of expansion that approximates or is equal to that of the glass. The pressure ring, on the other hand, has a larger coefficient of expansion, namely so large that

6C9 768/241

he can exert the pressure required for the pressure glass seal.

In FIG. 2, a vacuum-tight pressure glass seal on the cathode metal container is shown schematically, namely not upside down. The wall of the cathode metal container is denoted by 8 and that of the discharge vessel is denoted by 9. The sheet metal ring 10 is welded to the discharge vessel wall 9 at the point 11. It forms a channel 12 for receiving the glass flow 13, into which the cathode metal container wall 8 protrudes. The outer wall of the glass seal is formed by the discharge vessel wall 9 and pressed against the glass ring 13 by the pressure ring 14. With this arrangement, the expansion coefficients of the glass 13, of the ring 10 and of the cathode metal container 8 can be adapted to one another, so that these parts represent a connection that is as tension-free as possible. The pressure ring 14 and the discharge vessel wall 9 have a greater coefficient of expansion than the glass. The two parts 14 and 9 each have an enamel layer 15 and 16, which protect their surfaces from scaling. The enamel layers can be burned in before melting, but preferably at the same time as the glass is melted. The glass ring can also consist of two parts 13 _(i and 13j, the materials of which can have different expansion coefficients. 13 _e has the smaller and 13 ₆ the larger expansion coefficient. In this case, the part 8 can consist of ordinary steel.

3 shows schematically in cross section the attachment of a cathode metal container 17 to the Discharge vessel 18 with the aid of a pressure glass seal. In addition to parts 17 and 18 the glass ring 19 and the pressure ring 20. The pressure ring 20 and the discharge vessel wall 18 are rolled together, namely the discharge vessel container wall can be rolled into the ring. Man but can also, conversely, shrink the ring onto the discharge vessel wall. Advantageously If the shrink ring is then, as described in Fig. 1, made of scale-free stainless steel. The rolling point is shown with a slightly thicker line. According to FIG. 4 is on the collar 21 of the discharge vessel 22, a collar 23, which is bent into a Z-shape in cross section, is welded at the point 24. This collar also forms a channel 25 for receiving the glass flow 26, in which the collar 27 of the cathode metal container is immersed. The pressure ring is denoted by 28. The pressure ring consists of scale-free material. It has an enamel layer 29 and is on the collar 21 of the discharge vessel rolled on. In all cases, the reinforcement ring made of temperature-resistant steel, i.e. H. from such Steel, which retains its strength even at high temperatures. The discharge vessel exists made of scale-free material.

In the arrangement according to FIG. 3, the parts 18 and 20 are made of scale-free material, if the pressure ring 20 and the discharge vessel 18 are connected to one another in the rolling process or for this purpose it is ensured that they lie snugly against one another or when the pressure ring 20 is on the neck of the discharge vessel is shrunk. However, both parts can also be made of ordinary, i.e. scale-free material produce when the parts are connected to one another in the rolling process or when you ensure that they lie close to each other, provided that the materials have the same coefficient of thermal expansion to have. The same coefficients of thermal expansion cause that when heated During the melting of the glass 19, the guarantee is given that both parts are evenly expand and contract again as it cools and no air can enter between the parts.

Claims (12)

Patent claims: 1. Pressure glass seal with a reinforcement or pressure ring on the thin-walled Outer jacket of the seal, in particular for converter vessels, characterized in that Means are provided, which the scaling of the contact surfaces between the outer jacket and Prevent reinforcement ring. 2. Pressure glass seal according to claim 1, characterized in that scale-free material Used for at least one of the two adjacent parts (reinforcement ring, outer jacket) is (Fig. 1). 3. Pressure glass seal according to claim 2, characterized in that as a scale-free The material used is a scale-free stainless steel (Fig. 1). 4. Pressure glass seal according to claim 1, characterized in that the expansion coefficients of the reinforcement ring and the outer jacket are different from each other (Fig. 1). 5. Pressure glass seal according to claim 1, characterized in that the scale protection is effected by one or more enamel layers (Fig. 2). 6. pressure glass seal according to claim 5, characterized in that the enamel layer on the inside of the reinforcement ring is arranged (Fig. 2). 7. pressure glass seal according to claim 5, characterized in that the enamel layer on the outside of the thin-walled outer jacket of the glass seal is arranged (Fig. 2). 8. pressure glass seal according to claim 5, characterized in that enamel layers the facing surfaces of the reinforcing ring and the outer jacket are (Fig. 2). 9. Pressure glass seal according to claim 1, characterized in that the A ^ reinforcement ring and the outer jacket lie snugly against one another without a gap. 10. Pressure glass seal according to claim 9, characterized in that the reinforcing ring is cold rolled onto the outer jacket. 11. pressure glass seal according to claim 9, characterized in that the outer jacket in the reinforcement ring is cold-rolled. 12. Pressure glass seal according to claim 9, characterized in that the reinforcing ring consists of temperature-resistant steel. Documents considered: German Patent No. 906 595. 1 sheet of drawings © 609 768/241 1.57