Ultra-high-speed operating mechanism of gunpowder gas-driven circuit breaker

Abstract

The invention relates to a black powder gas-driven type super-high-speed operating mechanism of a breaker. The black powder gas-driven type super-high-speed operating mechanism of the breaker comprises a transmission piece and two blank ammunition shooting devices, wherein the transmission device is provided with an opening station and a closing station, and the two blank ammunition shooting devices drive the transmission piece to move. Each blank ammunition shooting device comprises a bolt, a recoil spring and a firing pin. The bolt is provided with a retreating station and an advancing station on the movement stroke. The two blank ammunition shooting devices are arranged on the two sides of the opening and closing direction of the transmission piece and are respectively provided with a corresponding gun barrel. The jetting openings of the two gun barrels both face the transmission device. The bolts on the two blank ammunition shooting devices are respectively fixedly connected with the piston guide rod which extends to the transmission device in a suspended mode. Each piston guide rod is inserted into a guiding gas cavity on the corresponding side in a guided and sealed mode. The gun barrel on any side and the guiding gas cavity on the other side are communicated through a corresponding guiding gas channel. By the adoption of the black powder gas-driven type super-high-speed operating mechanism of the breaker, opening and closing of the breaker can be achieved rapidly.

Description

technical field [0001] The invention relates to an ultra-high-speed operating mechanism of a gunpowder gas-driven circuit breaker. Background technique [0002] Some high-voltage circuit breakers will generate a large current when they are broken, so they have clear requirements for the breaking time. For example, in a DC power grid with a voltage level of 320kV, the rising speed of the DC side current is 3.5kA / ms when a short circuit occurs. Assuming that the current value on the line is 2kA during normal operation, the short-circuit current on the line can reach 9kA after 2ms, that is, a high-voltage DC circuit breaker capable of breaking 9kA current must be able to quickly act within 2ms to cut off the current. However, the opening speed of the existing spring operating mechanism and hydraulic operating mechanism cannot realize breaking the circuit breaker in such a short time; while the speed of the magnetic mechanism can meet the requirements of double-break or multi-br...

AI Technical Summary

Problems solved by technology

However, the above-mentioned launch type operating mechanism can only realize fast closing, but cannot realize fast opening

Moreover, due to the adoption of the bolt backseat structure, the cartridge case will expand and stick to the chamber under the action of gunpowder gas. If the cartridge case is too long or the chamber pressure is too high, it will lead to poor extraction of the cartridge case, and even cause the cartridge case to break. This limits the The power of the ammunition used is not conducive to the improvement of the action speed of the operating mechanism

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