SU813525A1 - Vacuum power switch - Google Patents

Description

(54) VACUUM POWER SWITCH

The invention relates to electrical engineering, in particular to gears of high-voltage vacuum switches.

Vacuum circuit breakers are known, comprising arcing chambers and a drive device connected by means of drive elements to a movable contact rod of the chamber.

Such a switch has a movable rod connected to the movable contact of the arcing chamber, and installed in two, located at some distance from one another, the supports. A grommet and a pressure spring are installed on the rod between the supports. Last mounted between said sleeve and an abutment located on the rod. Such a design allows limiting the effect of the drive mechanism on the moving contact of the chamber. The stroke limiting of the moving contact of the switch occurs after the moving contact enters a secure connection with a fixed contact. Drive. the vacuum switch mechanism is connected to the pass

2

a sleeve through a double-shouldered, hinged lever 1.

The disadvantage of this device is the presence of special guide pads in the brace for the movable rod and

supports for two shouldered sharnirovannoy levers, greater complexity in the manufacture.

Closest to the proposed vacuum switch with a buffer mechanism to limit the rolling out of the rolling

Claims (2)

contact at the end of the opening stroke, located along the axis of the rod connecting the movable contact with the actuator, contains an emphasis fixed to the rod on the side of the movable contact, and a movable part capable of moving along the rod, as well as a spring pre-compressed on the drive side between the stop and the moving part. The latter is held at the end of the rod with a nut. The moving part is connected to the drive unit with the help of a pull and a double-arm lever. At the end of the shutdown operation, the movable contact with the buffer mechanism moves by inertia, compressing the spring until then. until the end of the rod reaches, the stroke limiter located on the said rod is finally connected to the drive device 2. The disadvantage of this solution is the presence of additional restrictive parts, which leads to an increase in the labor intensity of manufacturing and makes it difficult to adjust the pressing mechanism. The purpose of the invention is to simplify the construction of the nogati mechanism and its adjustment. The goal is achieved due to the fact that in the mechanism of pressing the contacts of the switch, placed directly on the drive insulator, connected on one side to the moving contact of the arcing chamber, on the other hand, on the end of the drive rod located closer to the drive device has a through longitudinal groove, through which an axis passes, holding said pre-tensioned spring of the pre-tensioned spring, which is planted on this end, and a sleeve, which with its second end and a driving device. FIG. 1 shows the mechanism for pressing the contacts of the vacuum switch in the open position; in fig. 2 - the same, in the on position, side view. This vacuum switch contains three arcing chambers 1, in which a movable 2 and a fixed 3 contacts are placed. The movable contact of the chamber is connected to the driving rod 4, on the latter there is a cylindrical protrusion 5 and a through longitudinal groove 6. At the end of the driving rod located closer to the actuator of the switch, a prestressed spring 7, a washer 8 with a collar, an axis 9 and cylindrical sleeve 10. Lastly, with its second end, the axis 11 and the levers 12 are connected to the drive shaft 13. The device works as follows. FIG. 1, the device is depicted in the disconnected position, while the spring 7, placed between the protrusion of 5 tons and the clamp 8, is in the pre-tensioning position. Under the action of the force of the spring 7, the axis 9 is pressed against the lower edge of the longitudinal groove 6, i.e. it is in its lowest position. When the vacuum switch is turned on, the drive shaft 13 rotates around its I-axis, turns the levers 12, which, through the sleeve 10 and the driving rod 4, move the moving contacts 2 of the switch up to their closing with fixed contacts 3. After the contacts 2 and 3 of the switch closing the driving switch 4 it stops, and the cylindrical sleeve 10 continues to move upward for some time, compressing the spring 7 by some amount with the help of a clamp 8 until the drive elements rest on the locking device. At this point, the switch on process is completed. In the on position of the switch between the axis 9 and the lower edge of the longitudinal groove 6, a constant gap is formed. The process of turning off the switch proceeds in the reverse order. After unlocking the drive shaft, the cylindrical sleeve GO, moving down, initially selects a visible gap in the groove of 6 tons of g 4 until the contacts 2 and 3 of the switch are opened. At the same time, the spring 7 is somewhat opened, and the sleeve 10, alternating further down, carries away the pull 4, and with it the moving contact 2 of the switch. Pins 2 and 3 open, the switch is turned off. Claims of Invention A vacuum circuit breaker comprising one or more arcing chambers and a drive device connected to each chamber by means of a drive rod and a prjati mechanism with a pre-tensioned spring fixed directly to the drive rod, which is different. The fact that, in order to simplify the design of the preload mechanism and its adjustment, at the end of the drive rod located closer to the drive device, a through longitudinal groove is made through which the axis passes, which holds the preloaded spring of the preloaded spring and a sleeve which, at its second end, is connected to a driving device. Sources of information taken into account in the examination. US Patent No. 3784774, cl. 200-144 V, 2. US patent No. 4064383, cl. 200-144 V,