Hydraulic operating mechanism of high voltage circuit breaker

Abstract

The invention discloses a hydraulic operating mechanism of a high voltage circuit breaker, which comprises an oil tank, a working cylinder, an accumulator, an oil immersion type motor, a pump, a tertiary control valve, an oil heat installed on the oil tank, a temperature sensor, a fluid level controller, an air filter, and the like, wherein, all the parts are arranged inside the oil tank, except for the accumulator; the upper end of the working cylinder is connected to a bracket of a mechanism case through a flange; a piston rod is connected with a link mechanism of the circuit breaker; the lower end of the working cylinder is fixed with a multi-way body of a main valve; a leading secondary valve body and a leading primary valve body are arranged on the side surface of the working cylinder; the oil immersion type motor and the pump are fixed to the bottom surface of the multi-way body of the main valve; and the accumulator is communicated with the working surface through an oil pipe. The hydraulic operating mechanism has a simple structure and high efficiency and greatly simplifies the pipeline of a hydraulic system; a temperature heating and control element regulates the temperature of the oil and keeps the stability of the performance of the hydraulic operating mechanism; the mechanism has the advantages of high reliability of switching on / off operation and no leakage or pollution.

Description

technical field [0001] The invention relates to a high-voltage switchgear for high-voltage power transmission and transformation, in particular to a hydraulic operating mechanism for a high-voltage circuit breaker. Background technique [0002] High-voltage circuit breakers are key equipment for power transmission, and operating mechanisms are key components of high-voltage circuit breakers. The function of the operating mechanism is to convert the electrical signal of opening and closing into a mechanical signal through the electromagnet when the opening and closing command comes, and through energy amplification, quickly drive the contact action to complete the opening and closing task of the high-voltage circuit breaker. Among the faults of high-voltage circuit breakers, 44% of the serious faults are operating mechanism faults, and the mechanical faults of the operating mechanism account for about 40% of minor faults. Reliability plays an extremely important role. The h...

AI Technical Summary

Problems solved by technology

But at the same time, this mechanism has defects such as oil leakage, too many pipelines, and scattered components to varying degrees, resulting in low efficiency of the operating system, unstable performance, poor reliability, and serious pollution.

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