Types and operating modes of subway screen doors.

The subway screen door is installed on the subway platform, which separates the platform from the train running area to ensure the safety of passengers while waiting for the train. In addition, it can also prevent the cooling of the station (that is, the air conditioner) from being lost in summer. At the same time reduce the impact of train running noise and piston wind on the station, provide passengers with a safe and comfortable waiting environment, avoid delays in operation due to platform accidents, improve the service level of rail transit, and create necessary conditions for the rail transit system to realize unmanned driving.

1. Screen door type

There are two main types of screen doors. One type of screen door is a full-facade glass partition wall and movable door. It is installed along the edge of the station platform and at both ends of the platform to separate the passenger waiting area on the platform from the train parking area. Fully enclosed. This form of the screen door is generally used in underground stations. The main functions of this screen door system are to increase the safety of the station platform, save energy consumption and enhance environmental protection.

Another type of screen door system is an uncapped glass partition wall and sliding doors or stainless steel fence doors, which are semi-closed. Its installation position is the same as the first method. This type of screen door system is relatively simpler than the first type of screen door, and its height is lower than the first type of screen door, usually 1.2 to 1.5m. Air can circulate through the upper part of the screen door, mainly for isolation, and to ensure the platform waiting for Passenger safety, also known as the safety door.

2. PSD function

(1) To protect the safety of passengers:

Prevent Chengxiang from falling or jumping off the track l and causing danger, so that passengers can travel safely and comfortably on urban rail transit, and trains can also run in a safer environment, reducing the driver's sense of insecurity.

(2) Improve the platform waiting environment:

The screen door keeps the passengers and passengers on the platform at a safe distance from the passing train, reduces the wind pressure caused by the train entering or passing the platform, reduces noise, and has a better sound insulation effect, allowing passengers to have a more comfortable waiting space and environment

(3) Increase the utilization rate of station air conditioning and broadcasting:

The screen door effectively blocks the waiting side of the platform and the trackside, so the air conditioner in the station cannot flow out to the trackside through the platform, increasing the utilization rate of the air conditioning system in the entire station. And because the screen door has a good sound insulation effect, it can effectively enhance the effect of the broadcasting system in the station.

(4) Mitigate the impact of fire:

When a fire occurs on the platform side or the trackside, the screen door can isolate the fire and smoke from entering the platform from the track or spreading from the platform to the track and can prolong the interaction time between the two sides to increase the evacuation time of passengers.

3. Screen door operation mode

(1) Normal mode

In the normal operation mode of the system, when the train arrives at the station and stops within the allowable error range, the screen door system controls the opening and closing of the movable door after receiving the signal system instruction or the train driver's confirmation.

When the train stops, within the allowable range of the train parking position, the train driver sends an instruction to the signal system to open the train door, and the system sends the door opening instruction through the screen door master control unit. After receiving the door opening instruction, the door machine controller executes unlocking, Opening the door, and other operations.

When the train is ready to depart, after the signal system receives the driver's command to close the train door, the automatic screen door master controller issues a door-closing command to perform operations such as closing and locking the door. After all screen doors are closed, signal all closed and locked doors to the signaling system to allow the train to depart. After the driver confirms that all screen doors are closed and that no persons or objects are trapped, the driver leaves the station.

(2) Abnormal mode

Under abnormal conditions such as inaccurate train parking, signal system failure, and signal interruption between the signal system and the PSD system, and PSD system failure, the driver can switch the screen door body through the platform terminal control box to realize the platform operation of the screen door.

The driver first turns on the key switch of the control box at the end of the platform, then operates the door-opening button of the control box at the end of the platform, and after issuing the door-opening command, performs operations such as unlocking and opening the door.

The driver operates the door-closing button of the control box at the end of the platform, and after issuing the door-closing command, performs operations such as closing the door and locking the door. After all screen doors are closed, the platform end control box sends a signal to the signal system to lock all screen doors, allowing the train to leave the station.

When all the screen doors are closed, but the signal system cannot confirm that the screen doors are closed and the departure signal cannot be issued, the train driver first confirms whether there is any person or object trapped in the screen doors. If everything is normal, turn on the key switch of the control box at the end of the platform. Then use the interlock release button switch to forcefully send the train departure signal, allowing the train to leave the platform.