Equipotential intelligent conduction device for platform door

Abstract

The invention discloses an equipotential intelligent conduction device for a platform door, which is characterized in that a platform door terminal is connected with a rail terminal through a first switch, a current measurement module is used for sensing a current signal on an electrical connection line between the platform door terminal and the rail terminal, the platform door terminal is furtherconnected with a grounding terminal through a second switch, the rail terminal is connected with the grounding terminal through a third switch, the first switch, the second switch and the third switch are in control connection with a PLC (Programmable Logic Controller), and the current measurement module is in control connection with the PLC. The equipotential intelligent conduction device for the platform door has the beneficial effects that the equipotential connection between the platform door and the rail can be converted from a single connection or disconnection state into an intelligentcontrol state, potential safety hazards generated by the equipotential connection or disconnection between the platform door and the rail and the insulation breakage of an internal control circuit ofthe platform door can be eliminated, the current in the state of equipotential connection between the platform door and the rail can be monitored, whether the insulation of the platform door againstthe ground is normal or not is monitored, and an alarm is provided so as to facilitate the staff to take countermeasures.

Description

technical field [0001] The invention belongs to the technical field of rail transit, and in particular relates to an equipotential intelligent conduction device for platform doors. Background technique [0002] In the design of the traditional platform door system of urban rail transit, because there is a potential difference between the rail or vehicle and the platform door, the rail is used as the negative pole of the traction return. Generally, cables are used to connect the rails and platform doors to realize equipotential connection. Equipotential bonding refers to connecting separate devices and conductive objects with equipotential bonding conductors or surge protectors to reduce the potential difference between them. [0003] After the equipotential of the vehicle and the platform door is realized, if the platform door is poorly insulated from the ground, the rails will be directly connected to the ground through the platform door, causing a large amount of rail bac...

AI Technical Summary

Problems solved by technology

However, the first cost of this solution is high; the second is that it is unpredictable when the insulation will be effective, which brings hidden dangers to operation and maintenance; the third is that if the equipotential is not connected, when the internal control line of the platform door is damaged, the platform door will be at high voltage, endangering passengers. Safety

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