Operating mechanism and direct-operated grounding switch using operating mechanism

Abstract

The invention discloses an operating mechanism and a direct-operated grounding switch using the operating mechanism. A connecting lever of the operating mechanism is connected with an elastic member, thus in switching-on and switching-off processes, when the connecting lever drives a moving contact to move relative to a static contact, the elastic member applies corresponding torque to the connecting lever to enable the torque applied by the elastic member to the connecting lever to be combined with driving forces applied by a main shaft to the connecting lever, and the combined resultant forces drive the moving contact through the connecting lever to perform corresponding switching-on and switching-off actions, so that the elastic forces applied by the elastic member to the connecting lever are additionally provided on the basis that the single main shaft drives the connecting lever, operating forces needed in the processes that the connecting lever pushes and pulls the moving contact to act are reduced, and the switching-on and switching-off actions of the direct-operated grounding switch is time-saving and labor-saving.

Description

technical field [0001] The invention relates to an operating mechanism and a direct-acting grounding switch using the operating mechanism. Background technique [0002] At present, with the improvement of the safety requirements of the power grid system for equipment, more and more users in the market require the grounding switch in the switch cabinet to have a strong ability to make short-circuit current. The moving contacts of the grounding switch with air as the insulating medium are basically rotary blades, or some improvements are made on this basic model. This type of grounding switch is such as the "indoor high-voltage electric grounding switch" disclosed in Chinese Patent No. 200810162375.2. The grounding switch adds an electric mechanism to the most common existing rotary blade grounding switch, and improves the safety, but does not break away from the basic framework of the rotary blade grounding switch. Due to the contact shape of the blade type grounding switch,...

AI Technical Summary

Problems solved by technology

However, during the opening and closing process of the direct-operated earthing switch, the up and down linear motion of the moving contact is completely realized by the operating force applied by manpower on the operating handle, which will not only lengthen the time required for the opening and closing process of the direct-operated earthing switch, The opening and closing operation of the direct-acting earthing switch is slow, and it will increase the physical exertion of the operator, making the opening and closing operation of the direct-acting earthing switch laborious

In addition, after the direct-acting earthing switch is closed, due to the influence of the gravity of the moving contact of the earthing switch, the moving contact of the earthing switch tends to fall, and the crank arm connected to the lower end of the moving contact tends to fall, which will cause The moving contact of the earthing switch and the static contact of the earthing switch are disengaged, and the switch is automatically opened, that is, the direct-acting earthing switch needs to continue to exert a holding force to maintain the closed state after closing, otherwise it will be under the action of the weight of the moving contact of the earthing switch. The automatic opening of the switch makes the entire direct-acting earthing switch unable to maintain the closed state, and the normal use of the direct-acting earthing switch cannot be guaranteed.

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