An Arc Extinguisher Based on Segmented Insulators

Abstract

The invention discloses an arc extinguishing device based on a segmented insulator, which belongs to the field of segmented insulators. It includes a suspension cable, a linear drive set on the suspension cable and slidably connected with the suspension cable, a grid bar set at the output end of the linear drive, and a control group connected to the linear drive. There are arc angles on both sides of the bottom of the grid bar group. The grid bar group is composed of multiple arc extinguishing grid bars arranged at the output end of the linear driver. The arc extinguishing grid bars are equipped with a fixed frame and the distance between adjacent arc extinguishing grid bars gradually increases along the direction close to the linear drive. The pitch also gradually increases along the direction approaching the linear actuator. On the basis of ensuring the horizontal space of the arc striking angle, the present invention makes full use of the longitudinal space of the arc striking angle to enhance the deionization of the arc, reduces the erosion and thermal effect of the arc on the electrode, protects the segmental insulator equipment, and guarantees the high-speed train safe operation.

Description

technical field [0001] The invention relates to the field of breaking insulators, in particular to an arc extinguishing device based on a segmented insulator. Background technique [0002] Segmental insulators are important equipment for the same-phase electric segment of the electrified railway catenary. When the equipment is overhauled or fails, it can reduce the scope of power outages and reduce the interference to transportation. It is widely used in marshalling yards, locomotive maintenance yards, passenger hubs and double Line electrified railway. The section insulator has become one of the key equipments in the railway transportation system, and whether the section insulator operates safely and stably has become an important factor for the safe power supply of the catenary. When the electric locomotive pantograph passes through the section insulator, the current from the catenary of the previous section must be cut off, and the voltage at both ends of the section ins...

AI Technical Summary

Problems solved by technology

When the electric locomotive pantograph passes through the section insulator, the current from the catenary of the previous section must be cut off, and the voltage at both ends of the section insulator can reach up to several thousand volts. The arc generated here is often not easy to extinguish. The high temperature ablation effect makes the segments often under unfavorable working conditions

In the existing segmented insulator design, only the arcing effect of the arcing angle is not enough to limit the high voltage and high current arcing at both ends of the arcing angle, and the arc length generated by the pantograph passing through the segmented insulator The ablation effect of time on segmental insulators threatens the safety of traction power supply systems

Moreover, with the development of high-speed and high-power electrified railways, the voltage and current at both ends of the breaker isolator is gradually increasing, which makes it increasingly difficult for the traditional breaker insulator to successfully extinguish the arc.

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