Static contact with homing system for isolation switch

Abstract

The invention relates to a static contact with a homing system for an isolation switch. The stator contact comprises a fixed head and also comprises a conductive sandwiched plate and the homing system, wherein the homing system is arranged at a root of the conductive sandwiched plate and is matched with the conductive sandwiched plate in a sliding way, the homing system comprises a homing piece, a spring, a limitation boss and a guide sleeve, the homing piece sleeves the conductive sandwiched plate, the limitation boss is arranged on the conductive sandwiched plate and is used for limiting a horizontal movement limit position of the homing piece, and the guide sleeve is fixedly arranged at an outer part of the conductive sandwiched plate. The static contact with the homing system for the isolation switch is novel and unique in design, simple and efficient in structure, good in performance and low in construction cost, more importantly, the static contact has a homing function, the action limitation during usage and automatic homing after usage of the static contact are ensured, deformation and excessive damage caused by changes of a current and an electromagnetic force are prevented, the static contact is convenient to use for a long time and is convenient to maintain, and the static contact has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of switches, and in particular relates to a static contact for an isolating switch with a homing system. Background technique [0002] At present, the isolating switch device plays an irreplaceable role in life, and the static contact for the isolating switch is particularly important. However, there are many defects in the existing static contacts: [0003] First, long-term operation will inevitably lead to a certain deformation of the static contact, resulting in uneven pressure, which will not ensure reliable contact between the moving contact and the static contact, and will more easily cause spark discharge, thus forming a vicious circle; [0004] Second, using the electromagnetic force generated by circular current and Ampere's law to make the electromagnetic sheet of the static contact tighten the moving contact is easy to damage and is not suitable for long-term use; when the current flows through t...

AI Technical Summary

Problems solved by technology

[0003] First, long-term operation will inevitably lead to a certain deformation of the static contact, resulting in uneven pressure, which will not ensure reliable contact between the moving contact and the static contact, and will more easily cause spark discharge, thus forming a vicious circle;

[0004] Second, using the electromagnetic force generated by circular current and Ampere's law to make the electromagnetic sheet of the static contact tighten the moving contact is easy to damage and is not suitable for long-term use; when the current flows through the bent The electromagnetic sheets each generate a magnetic field, and the repulsive force in a single electromagnetic sheet will cause the electromagnetic sheet to deform. If things go on like this, it will not be able to return to its position, and thus cannot be used; the attractive force between the two electromagnetic sheets clamps the moving contact between them. When the current is too large, the clamping action of the electromagnetic sheet on the moving contact is excessive, which will lead to the phenomenon that the moving contact in the middle cannot be pulled out and deformed, which will cause damage to the switch device, insufficient protection, and extremely short life. repair;

[0005] Third, structurally speaking, the existing isolating switch has a complex structure and adopts more mechanical components to cooperate, so the price is relatively expensive and easily damaged; and the switch device is generally exposed to the air, the static contacts and There is no protective device for the moving contact, which makes it poor in weather resistance and short in service life

Images