Selective opening and closing type equipotential connecting device of subway shield door and control method of device

Abstract

The invention discloses a selective opening and closing type equipotential connecting device of a subway shield door and a control method of the device. The device is that a steel rail and the subway shield door are connected through an equipotential connecting wire; a connecting mechanism is arranged and is in a normal opening state; a voltage measuring device is used for measuring the potential difference between the steel rail and the subway shield door; a connecting mechanism monitoring control module is used for acquiring voltage data measured by the voltage measuring device, a switching signal of the subway shield door and a closing state signal of an equipotential connecting wire connecting mechanism, and then performing logic determining; when the connecting mechanism of the equipotential connecting wire is disconnected and if the shield door is opened and the potential difference of a steel rail exceeds a setting value, the connecting mechanism is closed, and otherwise, the current state is maintained; when the connecting mechanism of the potential connecting wire is closed and if the shield door is closed, the connecting mechanism is opened, and otherwise, the current state is maintained. With the adoption of the scheme, the device has the advantages that the safety of passengers getting on or off a bus can be ensured; the problem of igniting of the shield door can be solved; the reliability is high.

Description

technical field [0001] The invention relates to an equipotential connection device for selectively separating and closing subway screen doors. Background technique [0002] my country's subway power supply system generally adopts DC1500V and DC750V power supply systems. The train draws current from the catenary through the pantograph, and the current flows back to the negative busbar of the DC traction substation through the rail. In the DC traction power supply system, the steel rail is insulated from the ground to reduce the influence of stray current, but this also brings about the potential problem of the steel rail. In the subway station, screen doors are installed parallel to the platform, parallel to the train. In order to prevent passengers from stepping on air, the distance between the screen door and the vehicle is very small. When the passenger gets on and off the bus, the body is very easy to contact the carriage and the screen door body at the same time. If th...

AI Technical Summary

Problems solved by technology

[0003] However, during the operation of the subway, screen doors are often damaged due to improper installation of insulation during construction, and electrical pollution such as humidity and dust during operation.

In addition to realizing the equipotential connection between the rail and the door body, the equipotential connection line of the shielded door also leads the traction backflow in the rail to the shielded door, and connects to the ground through the weak joints of the shielded door, causing fire or combustion between the shielded doors and inside. arc, burning parts inside the screen door

In severe cases, the equipotential bonding line may even be blown

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