Limiting device for high-voltage isolating switch three-station operation mechanism

Abstract

The invention provides a limiting device for a high-voltage isolating switch three-station operation mechanism. The limiting device belongs to high-voltage isolating switch components. The limiting device is characterized in that the limiting device is composed of four limiting columns which are fixed on a front baffle plate and a back baffle plate and cooperates with the positions of guiding set keys at two ends of an energy storage spring, fastening screws for fixing the limiting columns on the back baffle plate, and adjusting bolts which adjust the limiting direction and limiting angle of the limiting device and corresponding guiding set keys; the cylinder body end of each limiting cylinder penetrates into a through hole on the front baffle plate; and the block end of each limiting cylinder is blocked in a through hole on the back baffle plate. Through testing, compared with the prior art, the limiting device is advantageous in that one point which is fixed on the back baffle plate according to the prior art is changed to two points which are fixed on the front baffle plate and the back baffle plate, and therefore an impact force of the guiding set keys at two ends of the energy storing spring to a limiting member, thereby greatly prolonging service life of the limiting member; the limiting device is fixed on the back baffle plate through the fastening screws, and furthermore one end of each limiting cylinder penetrates into the through hole on the front baffle plate, thereby realizing more convenient and simpler detachment and maintenance.

Description

technical field [0001] The invention belongs to a component matched with a three-position operating mechanism of a high-voltage isolating switch in a primary power distribution cabinet, in particular a limiting device for a three-position operating mechanism of a high-voltage isolating switch. Background technique [0002] The isolating switch is used in the high-voltage primary power distribution cabinet for connecting and isolating the high-voltage incoming busbar and grounding the feeder. It needs to have the following three functional positions: the isolating switch is turned on, that is, closing: the feeder is connected to the bus to receive power; the isolating switch is isolated, that is, opening: the feeder is disconnected from the bus; the isolating switch is grounded, That is, the ground terminal is closed, so that the feeder is closed and grounded reliably when there is no load, ensuring the safety of the load side of the feeder and the personal safety of maintena...

AI Technical Summary

Problems solved by technology

"But in actual use, just because "one end is actively connected between a pair of closing and opening operation guide keys, and the other end is actively connected between a pair of grounding operation guide keys" is at the critical point from energy storage to release. After the point, it quickly rushes to the closing position, opening position and grounding position of the disconnector. This strong impact is "fixed on the rear partition and cooperates with the rotation position of the guide group keys at both ends of the energy storage spring." 4 "limiting parts" limit stop, causing the four limiting parts in the three-position single-spring double-axis manual operating mechanism of the high-voltage isolating switch disclosed in the prior art ZL201420373714.2 to be subjected to strong impact; The parts are only fixed on the rear bulkhead in one direction, so the four limit parts can not bear the strong impact and the service life is not long, and they need to be maintained and replaced from time to time; and after maintenance and replacement, they need to be adjusted according to the rotation position of the guide group keys at both ends of the energy storage spring The relative positions of the limit directions and angles between the 4 limit parts and the guide keys at both ends of the energy storage spring are precise, so as to achieve the best effect of closing, opening and grounding

However, in the prior art ZL 201420373714.2, the four limiters in the three-position single-spring double-axis manual operating mechanism of the high-voltage isolating switch are often difficult to maintain and replace because they are only fixed on the rear bulkhead in one direction. The adjusting bolt on it is precisely adjusted to achieve the best effect of closing, opening and grounding, relative to the limit direction and angle relative to the guide group keys at both ends of the energy storage spring

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