DD211901A1 - VACUUM SWITCH CHAMBER FOR LOW VOLTAGE VACUUM SHOULDERS - Google Patents

Abstract

The invention relates to a vacuum interrupter chamber for low-voltage Vakuumschuetze with a fixed and about a metal bellows movable, the Schaltstuecke carrying electrode and a cylindrical housing made of a weldable metallic material, wherein the connecting elements have a flange for connecting the electrodes to the housing or metal bellows. With the inventive design of the connecting elements and the Schaltstuecke technologically easily manageable and over a long period of operation stable and vacuum-tight Loetverbindungen have arisen. This has been achieved by forming the flange on the connecting elements as a tapered dome pointing in the direction of the switch piece, into which electrodes have been pressed in and knocked out. The shifters have a flat bore in which the electrodes are butt-inserted.

Description

Inventor: Ing. Werner König Berlin, 1 * 12.1982

Ing. Harald Zühlsdorf? 1321

Zustellungsbevollm .:

, Institute of Balancing Technology in the Combine VSB EAW Berlin-Treptow "! Friedrich Ebert" 1055 Berlin, Storkower Str. 101 Office for Property Rights

Vacuum switching chamber for low-voltage vacuum cap

H 01 H 33/66

Field of application of the invention

The invention relates to a vacuum switching chamber for low voltage s-Vakuumschüt ze with a fixed and a movable metal bellows, the contact pieces bearing, electrode.

The contact piece-carrying electrodes are made of electrically conductive materials to which metallic Yerbindungselemente of stainless and gas-poor material are soldered by means of Vakuumlöttechnik.

Characteristic of the known technical solutions

Known VakuumgefäSe consist of cylindrical electrodes and cylindrical matched metal rings as connecting elements in order to allow a high, the function-related requirements corresponding vacuum tightness (DE-OS 16 40 211).

The production of the required high degree of fit for a vacuum soldering requires the highest demands on the equipment and is very time consuming.

The further disadvantage is that high costs incurred in the production and that Minilecks in long-term operation

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can occur at these solder joints. Furthermore, the known constructions have the disadvantage that must be provided by the design of the switching pieces with a pin and the electrode with a corresponding hole, vent holes in the contact or electrode. In addition, elaborate passport work is necessary. The simultaneous soldering of the contact pieces and the connecting elements is usually not readily possible.

Object of the invention

With the inventive design of the connecting elements and the switching pieces technologically easy to handle and over a long period of operation stable and vacuum-tight solder joints are created.

Explanation of the essence of the invention

The invention has for its object to provide a design of the fasteners and "he" switching pieces that can be produced with simple resources and low effort, the solder joints on an electrode in one operation and produced over a long period of high strength and reliable vacuum density should be.

According to the invention, this object is achieved in that the splashing is formed on the connecting elements as a sighting of the switching piece facing conically drawn nozzle, in which the electrodes are pressed and soldered. The contact pieces have a flat recess into which the electrodes are soldered butt.

By this design according to the invention it is achieved that between the connecting element and the electrode is not accurate to make the usual soldering gap forming fit and the soldering in a vertical position at the nozzle and the switching piece can be made simultaneously. On

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Another advantage "is that by soldering the electrode into the conical nozzle, the solder at the outflow is avoided from the usual soldering nip» Moreover, it is also no longer necessary to provide at the electrode or on the contact piece ventilation holes, as by the flat Turning out no air cushion on joining.

It has been found that, contrary to the general notion that only one capillary gap enables vacuum-tight soldering, this conical configuration is stable and vacuum-tight over a long period of time.

embodiment

In the drawing, a vacuum interrupter chamber is shown in half section.

The vacuum switching chamber consists of two metallic hollow bodies 1 j 2, which are welded at their contact points 3. In the upper hollow body 1, a metal bellows 4 is arranged, at the lower end of an annular connecting element 5 is seated. This connecting element 5 has a nozzle 6 tapered in the direction of the contact piece 10. In this nozzle 6, the movable cylindrical electrode 7 is pressed and soldered vacuum-tight.

In the lower hollow body 2, the bottom 3 has a conically shaped nozzle 6 ¹ pointing in the direction of the contact piece 10 into which the fixed electrode 9 is pressed and soldered. The switching pieces 10 each have a flat recess 11, in which the electrodes 7; 9 are soldered.

The compounds are produced by the electrodes 7; 9 in the nozzles 6; 6 'are pressed. Thereafter, 'the electrode 7; 9 in the flat recess 11 of the contact piece 10, in which a solder foil is positioned, a solder ring on the opening of the nozzle 6; 5 'placed and soldered both compounds by the action of heat in a vacuum.

Claims (1)

Experience sanspr ucii Vacuum switching chamber for low voltage vacuum contactors with a fixed, and on a Metairbalg movable, the Schaitstücke carrying electrode and a cylindrical housing aas a weldable metallic material, wherein for connection of the electrodes with the housing or metal bellows, the "connecting elements have a flange, characterized in that the flange is designed as a nozzle (6; 6 ^J ) conically drawn in the direction of the contact pieces (10) into which the electrodes (7; 9) are pressed and soldered, and the contact pieces (10) have a flat shaft rotation (11 ) into which the electrodes (7; 9) are soldered dull * For this 1 page drawing ·