Opening and closing actuating mechanism of vacuum circuit breaker

Abstract

The invention discloses a vacuum circuit breaker switching-on and switching-off executing mechanism, and relates to the technical field of vacuum circuit breaker switching-on and switching-off. The device comprises a control rod which is correspondingly connected with a moving contact in an insulating manner; an execution cylinder is coaxially arranged outside the control rod; the execution cylinder is vertically arranged; rhombic exhaust holes are formed in the side wall of the execution cylinder in the vertical direction; the interior of the execution cylinder is divided into an upper half switching-on cavity and a lower half switching-off cavity. The upper half part of the exhaust hole is correspondingly communicated with the closing cavity, and the lower half part is correspondingly communicated with the opening cavity; a piston is slidably sleeved in the execution cylinder; the control rod slidably penetrates through the upper end of the execution cylinder and is fixed to the upper end of the piston. The height of the piston is less than half of that of the exhaust hole; limiting spacer sleeves are coaxially fixed to the upper end and the lower end in the execution cylinder. The control rod penetrates through the limiting spacer sleeve at the upper end. The vacuum circuit breaker has the advantages that the vacuum circuit breaker is high in opening and closing speed, small in size, low in cost, high in applicability and convenient to apply and popularize.

Description

technical field [0001] The invention relates to the technical field of opening and closing of vacuum circuit breakers. Background technique [0002] The vacuum circuit breaker mainly includes three parts: vacuum interrupter, electromagnetic or spring operating mechanism, bracket and other components. The vacuum interrupter is the core device of the vacuum circuit breaker. It uses a pair of electrodes (contacts) and other parts sealed in the vacuum to realize the closing or breaking of the circuit with the help of the excellent insulation and arc extinguishing performance of the vacuum. After the power is cut off, the arc can be quickly extinguished and the current can be suppressed to avoid accidents and accidents. Generally speaking, when the moving contact is in contact with the static contact, the circuit is closed (closed), and when the moving contact is separated from the static contact, the circuit is disconnected (opened); the electromagnetic or spring operating mech...

AI Technical Summary

Problems solved by technology

Because when the switch is closed, if the speed is too low, the pre-breakdown time will be long, the arc will last for a long time, the electrical wear on the contact surface will be large, and the contact will be welded and stuck, which will reduce the electrical life of the arc extinguishing chamber; and When opening, if the speed is too low, the first opening phase cannot be broken and continues to the next phase. The original first opening phase becomes the last opening phase, and the arcing time is lengthened, which increases the difficulty of breaking and even makes breaking fail.

However, the current control method of the electromagnetic or spring operating mechanism determines that if it wants to ensure a fast opening and closing speed, it needs to ensure that the output power of the operating mechanism is large and the mechanical strength of the whole machine is high, which will greatly increase the operating speed. The size and cost of the organization reduce the technical and economic indicators and narrow the scope of application

Images