DE1022293B - Retractable and extendable switch operated with compressed air - Google Patents

Description

The invention relates to a retractable and extendable, compressed air operated switch with a Pipe coupling that connects the compressed air connection pipe of the switch with the stationary compressed air pipe. With the known switches, the pipe coupling opens automatically when the switch is extended. It is therefore necessary when checking the switch with the switch partially extended, a Hose connection between the stationary pipe part and the movable pipe part arranged on the switch to be able to operate the switch with compressed air.

The disadvantage of the arrangement of such a hose connection according to the invention is thereby avoided that the socket piece of the pipe coupling and the immersed in the socket piece movable Pipe mouthpiece of the pipe coupling are made so long that the connection between the two Pipes still exist when the switch is extended from the switchgear cubicle to the test position. Since the coupling parts that come into connection with one another, namely the socket piece and the pipe mouthpiece, sliding along each other over long distances when extending and retracting is called a seal a known O-ring seal used, which has the advantage of simplicity, the smaller Has friction surface and reliable mode of operation. The material for the O-ring seal is used Synthetic rubber into consideration.

An exemplary embodiment of the invention is shown in the drawing. With 1 the fixed, in the switching cell arranged pipe, with 2 the compressed air connection pipe firmly connected to the switch, not shown designated. The tube 1 carries a with the tube 1 z. B. soldered socket piece 3, the one Has recess 4. A round cord seal is denoted by 5, which is made of rubber (synthetic or natural rubber) can exist. Once the tube 2 has been pushed into the mounting piece 3, the round cord seal 5 lies down due to their elasticity to the socket piece 3 and the tube 1 and when the compressed air flows in, pressed even tighter.

The drawing shows the position of the two tubes 1 and 2 when they are pressure-tight with one another, shown in dashed lines connected (see section 7), i.e. the switch is retracted. If the switch is extended, so the pressure connection pipe 2 is moved to the right. This establishes the connection between the two Pipes 1 and 2 released. When retracting the switch is achieved by the guide 6 that the fixed Pipe section 1 is taken with security.

Retractable and extendable, with compressed air
operated switch

Applicant:

Siemens-Schuckertwerke

Corporation,

Berlin and Erlangen,

Erlangen, Werner-von-Siemens-Str. 50

Oskar Buron, Berlin-Siemensstadt,
has been named as the inventor

The seal is achieved automatically by the round cord seal 5.

In the exemplary embodiment, the guide piece 3 and the round cord seal are connected to the stationary tube 1 5 connected. But you could also on the movable tube 2, the guide piece 3 and the Attach the round cord seal 5.

Claims (3)

Patent claims: 1. Retractable and extendable, compressed air operated switch with stationary compressed air connection with an automatic pipe coupling between the stationary one when extending and retracting and the movable compressed air pipe socket, characterized in that the socket piece (3) the pipe coupling and the movable pipe mouthpiece (2) of the pipe coupling are made so long are that the connection between the two pipes to be coupled together still exists, if the switch has moved out of the switchgear cell to the test position. 2. Switch according to claim 1, characterized in that in the socket piece (3) of the pipe coupling a per se known round cord seal is arranged. 3. Switch according to claim 1, characterized in that the material for the O-ring seal Synthetic rubber is used.