Vacuum circuit breaker and its multifunctional operation block

Abstract

The invention discloses a vacuum circuit breaker and a multi-functional operating block thereof. The multi-functional operating block is of a flat block structure, wherein a sealing groove is formed in a block and comprises a first arc segment, a second arc segment, a third arc segment, a fourth arc segment and a fifth arc segment which are sequentially connected, the second arc segment and the fifth arc segment are arranged opposite to each other, the first arc segment and the fourth arc segment are respectively arranged at two ends of the sealing groove, and a rotary clamping block is further arranged at a connection part of the first arc segment and the fifth arc segment and is rotatably arranged on the multi-functional operating block. The vacuum circuit breaker comprises the multi-functional operating block, wherein the multi-functional operating block is arranged on an installation plate by a rotation shaft, an output crank arm is further rotatably arranged on the installation plate, and an operating shaft is arranged on the output crank arm and is matched with the sealing groove in a rolling way. The operating handle is very simple in structure, the fabrication cost is greatly reduced, closing and breaking are determined by mechanical contact, and the reliability of strength and position is greatly improved.

Description

technical field [0001] The invention relates to a vacuum circuit breaker, in particular to the specific structure of a multifunctional operation block in the vacuum circuit breaker. Background technique [0002] With the improvement of environmental awareness, no SF 6 Environmentally friendly products have been developed, including solid insulated ring network cabinets and environmentally friendly gas (N 2 Or dry air) ring main unit, no matter what kind of cabinet type, adopts vacuum load switch. Since the vacuum interrupter is a butt contact, a large contact pressure is required in the closing position to ensure good electrical contact performance. It is used for SF 6 The spring over-center mechanism of the load switch cannot meet the characteristics of the large contact reaction force when the vacuum load switch is in the closing position, so the vacuum load switch adopts the vacuum circuit breaker mechanism to realize the opening and closing operation. However, the loa...

AI Technical Summary

Problems solved by technology

Closing operation, opening operation, closing hold, and opening hold are all realized by different systems, requiring a large number of parts and complex mechanisms

[0005] SF 6 The energy storage spring of the spring over-center mechanism of the load switch is directly connected to the output shaft, and the output characteristic curve cannot meet the requirements of the vacuum load switch

In addition, when the vacuum load switch is in the closing position, contact pressure is required. At this time, the energy storage spring of the over-center mechanism has the smallest energy, and it is difficult to meet the requirements of large contact reaction force.

Images