DE2755675C2 - Drive device for switchgear in gas-insulated, encapsulated switchgear cells - Google Patents

Description

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The invention relates to a drive device for switching devices in gas-insulated, encapsulated switching cells with at least one switching device that is operated by a rotatable switching shaft.

SFö gas is preferably used as the insulating gas. The operation of switchgear in a gastight enclosure Switching cells are housed, takes place in known designs by axially movable Shovel rods. The gastight implementation of the rod is thereby made by flexible, the axial thrust movement completing sealing elements such. B. Bellows or rubber elastic membrane accomplished with one end on the rod and with the other End to be attached to the cell encapsulation.

These sealing elements do not allow any direct rotary movement of the drive rods that are passed through. Nice a relatively small rotation would cause mechanical impairment of the sealing elements.

Depending on the arrangement of the switching devices in the switching cell and location of the operating location outside of the switchgear cubicle, there are cases in which an immediate Actuation by a rotary movement for the drive

leadership would be cheaper.

There is already a switching device known that one Has shift lever, which is mounted in a ball joint and in four starting from a neutral central position Directions can be actuated and its passage opening is sealed by means of a sleeve (DE-AS 11 47 292).

The present invention was based on the object of the switching device of the opening mentioned type to lead associated actuating shaft gas-tight through the encapsulation, so that a rotary movement the wave is possible.

This task is achieved with the said Schaltgcrät -i by the characterizing part of the patent claim 1 solved.

The provision of an actuating shaft which executes a wobbling movement makes it possible in an advantageous manner a gas-tight implementation of the drive device through the encapsulation without the sealing element is stressed on rotation when the Weüe is actuated.

A first embodiment provides that on the On the operating side outside of the encapsulation, an additional rotating shaft is used as a drive shaft as an extension of the switching shaft is provided, which receives the free end of the actuating shaft in a bearing eccentrically attached to it.

A simplification of this drive device is achieved in that the actuating shaft is designed as a drive lever and can be actuated directly by hand is. This measure saves a bearing point for the operator-side drive shaft.

Further advantageous refinements of the drive device according to the invention are set out in the subclaims and explained in the following description of exemplary embodiments. The working examples are shown in principle in the drawing.

Fig. 1 shows a gas-tight encapsulated, l * e switch cell with removed side wall in side view,

F i g. 2 shows a detail from FIG. 1 in a modified version.

According to Fig. 1, a three-pole switch disconnector is located in the switch cell with gas-tight encapsulation 1, whose connection contacts 2 and impact contacts 3 are attached to post insulators 4. The connection contacts 2 are connected to contact bushings 5 fastened to the encapsulation 1 in an insulated and gas-tight manner.

The cutting knives 6 are driven by a crank linkage 7 from a selector shaft rotatably mounted in bearings 9, 10 8 powered.

The switching shaft 8 is via an actuating shaft 11 with an operator side in one on the encapsulation 1 attached bearing housing 16 connected to the bearing drive shaft 12, the ends of the actuating shaft 11 are rotatably mounted in the bent shaft ends 13, 14.

The lead-through opening for the actuating shaft 11 is through an encapsulation 1 and actuating shaft 11 attached bellows 18 sealed.

The central bearing 15 of the actuating shaft 11 was in the exemplary embodiment by corresponding Deformation of the encapsulation 1 produced. The section of the actuation shaft stored in the central bearing 15 11 is designed here as a ball 19, for example. Radial rotation of the drive shaft 12 has a wobbling motion of the actuating shaft 11 and a radial rotation of the shift shaft 8 result.

In the embodiment according to FIG. 2, the actuating

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transmission shaft 11 'forming a drive lever 20 request and provided with a handle 17 at the end. This arrangement is compared to the arrangement according to FIG. 1 only 2 bearings of the actuating shaft 11 ' and is therefore cheaper to manufacture.

The drive lever 20 is operated by hand. Its direction of movement follows when operated Course of a conical surface.

It should also be mentioned that the load break switch shown in the exemplary embodiment is only used for explanation became; the drive device according to the invention is in principle applicable to all types of switching devices, which are driven by a rotatable selector shaft and are located within a gas-tight enclosure are located.

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Claims (6)

Patent claims: 1. Drive device for switching devices in gas-insulated, encapsulated switching cells with at least one Switching device that is operated by a rotatable switching shaft, characterized by a Actuating shaft (11, 11 '), on the one hand in an eccentric bearing connected to the control shaft (8) (13), on the other hand in one in the area of the capsule! 0 Lung feedthrough attached bearing (15) is mounted so that this actuating shaft (11,11 ') around the Carry out a tumbling motion with both ends of the bearing (15) in the area of the encapsulation leadthrough can, and that between the actuating shaft and the switching cell wall (1) in a manner known per se a sleeve-like sealing element (18) is provided 2. Drive device according to claim 1, characterized in that the sealing element is a Fa! tenbalg (18) or a rolling diaphragm. 3. Drive device according to one of claims 1 or 2, characterized in that the actuating shaft (H ') is designed as a drive lever (20) and can be actuated directly by hand 4. Drive device according to one of claims 1-3, characterized in that the central storage point (15) for the actuating shaft (11, 11 ') is incorporated into the switching cell encapsulation (1) or consists of parts of the switch cell enclosure (1). 5. Drive device according to one of claims 1-4, characterized in that on the operating side outside the encapsulation as an extension of the control shaft (8) a wt.tere rotating shaft as Drive shaft (12) is provided, which in an eccentrically mounted on it bearing (14) the free Receives the end of the actuating shaft (11). 6. Drive device according to one of claims 1-5, characterized in that on the Switching cell capsule (1) has a bearing housing (16) with a bearing point for the operator-side drive shaft (12) is attached.