Hydraulic operating mechanism, energy storage cylinder module and circuit breaker

Abstract

The invention relates to a hydraulic operating mechanism, an energy storage cylinder module and a circuit breaker. The hydraulic operating mechanism comprises a working cylinder, a disc spring set forproviding oil pressure for the working cylinder, and an energy storage cylinder. A fixed seat and a movable seat are arranged at the upper end and the lower end of the disc spring set separately, a compression spring is further arranged between the fixed seat and the movable seat, the movable seat comprises a main movable seat body located above the disc spring set, and an auxiliary movable seatbody located above the compression spring, and the auxiliary movable seat is separably pressed on the main movable seat body. The energy storage cylinder comprises a main piston cylinder and an auxiliary piston cylinder, a main piston rod and an auxiliary piston rod for ejecting the main movable seat body and the auxiliary movable seat body are arranged in the main piston cylinder and the auxiliary piston cylinder separately, a rod cavity and a rodless cavity of the main piston cavity communicate with each other, a communicating passageway is formed between the rod cavity of the main piston cylinder and the rodless cavity of the auxiliary piston rod, a passageway opening, communicating with the rod cavity of the main piston cylinder, of the communicating passageway is formed in the strokeof a piston in the main piston cylinder. The pressure of secondary opening is increased on the premise of not increasing the rated oil pressure.

Description

technical field [0001] The invention relates to a hydraulic operating mechanism, an energy storage cylinder module and a circuit breaker. Background technique [0002] The circuit breaker of high-voltage switchgear requires its operating mechanism to drive the arc-extinguishing unit to perform opening-closing and opening operations to cut off the fault current and protect the high-voltage line. The primary opening is operated under the rated oil pressure, and the secondary opening is operated under the oil pressure not lower than the opening and locking. [0003] In the Chinese patent whose announcement number is CN201655571U and whose announcement date is 2010.11.24, a hydraulic operating mechanism of a high-voltage circuit breaker is disclosed. The hydraulic operating mechanism includes an operating cylinder module, an energy storage cylinder module, a control module, a monitoring module, The charging pump module, auxiliary switch, oil tank and disc spring group, the two ...

AI Technical Summary

Problems solved by technology

However, if the output force of the disc spring group is too high, there will be safety hazards, and the speed at the time of opening is higher than the required value, and the supply exceeds demand, resulting in energy loss.

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