Operating mechanism and switching apparatus using same

Abstract

The invention relates to an operating mechanism and a switching apparatus using the same. The operating mechanism comprises a power apparatus and a transmission mechanism, wherein the transmission mechanism comprises a connecting lever shaft connected with an output rotary shaft of the power apparatus and an insulating pull rod which is in transmission connection with the connecting lever shaft and used for driving a circuit breaker to switch on and switch off; the operating mechanism also comprises a spring apparatus which provides assisting force firstly and then provides buffer force in both of the switch on and switch off processes. According to the operating mechanism and the switching apparatus using the same, the spring apparatus supplies an assisting force effect to a moving contact of the circuit breaker in a front period of the switch on and switch off, so that short-time output power and transient torque output capability of the power apparatus can be reduced, and the power apparatus obtains the characteristics of low rotational inertia, small size and light weight; and meanwhile, the spring apparatus supplies a buffering effect to the moving contact of the circuit breaker in a later period of the switch on and switch off, so that the circuit breaker can be stopped in the switch on and switch off positions smoothly and stably so as to lower impact force.

Description

technical field [0001] The invention relates to an operating mechanism and a switch device using the operating mechanism. Background technique [0002] The traditional operating mechanisms, such as electromagnetic operating mechanisms, spring operating mechanisms, pneumatic operating mechanisms and hydraulic operating mechanisms, have the following problems: 1) Inherent mechanical characteristics are poor, and motion process control cannot be realized. Only a single Closing and opening operations at high speed, poor flexibility; 2) Long-term static high-voltage circuit breakers have large dispersion of action time due to mechanism stickiness and jamming, and it is difficult to meet the requirements of opening and closing movement speed; 3) Traditional mechanisms The offline adjustment range of motion characteristics is limited, and the adjustment process is relatively complicated. In some special occasions, it is often necessary to replace the operating mechanism to meet the...

AI Technical Summary

Problems solved by technology

[0002] The traditional operating mechanisms, such as electromagnetic operating mechanisms, spring operating mechanisms, pneumatic operating mechanisms and hydraulic operating mechanisms, have the following problems: 1) Inherent mechanical characteristics are poor, and motion process control cannot be realized. Only a single Closing and opening operations at high speed, poor flexibility; 2) Long-term static high-voltage circuit breakers have large dispersion of action time due to mechanism stickiness and jamming, and it is difficult to meet the requirements of opening and closing movement speed; 3) Traditional mechanisms The offline adjustment range of motion characteristics is limited, and the adjustment process is relatively complicated. In some special occasions, it is often necessary to replace the operating mechanism to meet the application requirements, resulting in an overly long product line, which is not conducive to production and maintenance; 4) The traditional operating mechanism separation and closing When the gate is operated, there will be a strong mechanical collision between the mechanical parts, which is extremely unfavorable to the service life and operation reliability of the circuit breaker; Faults often pose personal safety risks; 6) The core control functions of high-voltage circuit breakers cannot be intelligentized; 7) Key mechanical state parameters can only be measured during opening and closing operations, which is difficult to meet the predictive requirements required by "condition maintenance". critical requirements

However, after the high-voltage circuit breaker uses the operating mechanism, the energy required for the movement of the moving contact of the circuit breaker is only provided by the motor of the operating mechanism. At the beginning of opening and closing, the moving contact needs to be opened and closed quickly. Therefore, the short-term output power and torque output power of the motor of the operating mechanism must be designed according to the peak state, so that it can have the ability of high power output and high transient torque output, and meet the initial dynamic contact of opening and closing. The movement speed required by the head; when the motor has high power output and high transient torque output capability, it will lose the characteristics of small moment of inertia, small size and weight, and it will not be able to adapt to the overall performance and cost of the circuit breaker Require

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