Automatic switch-on and switch-off device of overhead line of electric locomotive

Abstract

The invention relates to an automatic switch-on and switch-off device of an overhead line of an electric locomotive, by which the electric locomotive is automatically switched on when a pantograph touches a power supply overhead line and is automatically switched off when the pantograph leaves the power supply overhead line. The automatic switch-on and switch-off device comprises a voltage detection unit, a current detection unit, an overcurrent detection unit, a main switch, a control unit, a display alarm unit and a control power supply unit, wherein the current detection unit, the overcurrent detection unit and the main switch are connected in series in a direct current major loop; the voltage detection unit is connected between the direct current major loop and the ground; the output ends of an overvoltage detection unit, the current detection unit and the overcurrent detection unit are all connected with the input end of the control unit for program control; the output end of the control unit is connected with the main switch and the display alarm unit; and the control power supply unit provides power for the control unit. The invention ensures that the power supply of low overhead lines of drift laneways underground is safe and reliable and replaces a traditional power supply mode of manual power failure and power transmission.

Description

technical field [0001] The invention relates to a power supply device, in particular to an automatic power-on and power-off device for an electric locomotive in a mine. Background technique [0002] At present, the trolley-type electric locomotive is the main transportation machinery in mines. It adopts DC trolley for power supply, has good speed regulation performance and works reliably. However, the wires in the underground roadway are easy to touch, leading to safety accidents; especially in the underground roadway along the vein, due to the height and width of the roadway and the existence of the ore-drawing funnel, the height of the electric vehicle wire is generally difficult to exceed 1.8 meters. On-site operators pose a great security threat. In order to ensure safety, most of the wiring in these roadways adopts manual power stop and transmission, which is very inconvenient, and it is easy to forget the power failure; some do not set up wiring, and use manpower to p...

AI Technical Summary

Problems solved by technology

However, the wires in the underground roadway are easy to touch, leading to safety accidents; especially in the underground roadway along the vein, due to the height and width of the roadway and the existence of the ore-drawing funnel, the height of the electric vehicle wire is generally difficult to exceed 1.8 meters. On-site operators pose a great security threat

In order to ensure safety, most of the wires in these tunnels use manual power stop and transmission, which is very inconvenient and easy to forget the power outage; some do not set wires, and use human-powered mine carts, which is labor-intensive and low-efficiency

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