Disconnecting switch and disconnecting link mechanism thereof

Abstract

The invention provides an isolating switch and its knife mechanism. The knife mechanism comprises two oppositely arranged knife blades. A first gap for the moving contact of the isolating switch is formed between one end of the two, and a first gap is formed between the other ends. Form the second gap for the static contact of the isolating switch to enter; when the moving contact enters the first gap, the two knife blades are driven to clamp the first elastic component of the moving contact, and the first elastic component connects the two knife knives to close One end of the first gap; when the static contact enters the second gap, the two knife blades are driven to clamp the second elastic component of the static contact, and the second elastic component connects the two knife knives near one end of the second gap. Since the present invention exerts clamping force on the switch knife through the deformation of the elastic component, avoids the deformation of the switch knife and the contact itself, and can ensure the surface contact between the switch knife and the contact, thus ensuring the effective contact between the switch knife and the contact , thereby reducing the main circuit resistance of the isolating switch, thereby improving the conductivity of the isolating switch.

Description

technical field [0001] The invention relates to the technical field of isolating switches, in particular to an isolating switch and a knife switch mechanism thereof. Background technique [0002] The isolating switch is installed in the locomotive and EMU high-voltage electrical box or grid side cabinet. The knife switch mechanism of the isolating switch is a high-voltage conductive part of the isolating switch. Its main function is to realize the breaking and closing of the high-voltage conductive part of the main circuit of the locomotive or EMU, that is, the function of opening and closing, and to realize the isolation and isolation of the main circuit of the high-voltage system of the locomotive or EMU. conduction. [0003] At present, the isolating switch mainly relies on the deformation of the switch knife and the contact itself to realize the contact between the two, but the deformation of the switch knife and the contact itself can easily lead to contact deformation...

AI Technical Summary

Problems solved by technology

[0003] At present, the isolating switch mainly relies on the deformation of the switch knife and the contact itself to realize the contact between the two, but the deformation of the switch knife and the contact itself can easily lead to contact deformation, forming point contact or partial line contact, which cannot ensure a sufficient contact area. Causes arcing, which affects the normal conductivity of the disconnector

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