1. Shielded safety door system
The shielded safety door system consists of a shielded safety door, a power distribution system, and a management monitoring system. The shielded safety door is the final execution device to realize the system function, including: drive system, control system, etc.
The shielded safety door transformer device (DC24V) is designed and installed in conjunction with equipment such as high-voltage control and UPS backup power.
2. Main principles of settings
(1). The layout of the shielded safety door should correspond to the location of the sidewalk.
(2). The layout of the shielded safety door at the station must meet the requirements of limitation. The center of the platform shielded safety door and the center line of the railing should be basically the same, and in any case can not exceed the edge of the platform.
(3). The shielded safety door system must have a fast-enough door opening and closing speed, and the working intensity should at least meet the interval requirements of traffic lights at intersections.
(4). The shielded safety door should have an obstacle detection function. During the opening and closing of the shielded safety door, effective measures should be taken to prevent the passenger from being pinched;
(5). The shielded safety door body should have sufficient strength and rigidity. Even under the most unfavorable combination of load conditions, the deformation of each part of the door body perpendicular to the direction of the roadway shall not exceed ±15mm.
(6). The structure design and material selection of shielded safety door meet the requirements of open-air working environment. Considering changes in temperature and humidity, as well as damage from rain and snow, it should be resistant to mildew and corrosion.
(7). Shielded safety doors should be easy to install, adjust, disassemble, and repair, with less working load.
(8). Stainless steel or aluminum materials shall be selected for the frame and panel of the shielded safety door body to meet the requirements of Class A non-flammability. Effective measures should be taken to prevent passengers from being pinched during operation. For those cannot use non-flammable materials, such as wires, cables and sealing materials, they should be flame retardant, low smoke, halogen-free, and nonradioactive.
(9). Shielded safety door system should adopt products that has the following advantages: advanced technology, reliable performance, reasonable structure, stable quality, safe and reliable operation, easy to disassemble, debug and maintain, beautiful appearance.
3. Main technical parameters of platform shielded safety door
(1). Quantity of shielded safety doors: 8 doors, one set of control system.
(2). Total length of each door unit: 4000mm.
(3). Opening mode: single opening mode
(4). Net opening width: 1500 mm (+5%).
(5). Total height of shielded safety door: 1200mm.
(6). Total thickness of shielded safety door: ≦210mm.
(7). Closing force of each shielded safety door: ≤150N (measured when the door is closed to one-third of the stroke)
(8). Manual opening force when shielded safety door is unlocked: ≤ 133N.
(9). The maximum kinetic energy of each shielded safety door should be ≤10J.
(10). Shielded safety door opening time: 2.5±0.1s~3.5±0.1s adjustable within range (adjust according to time interval of traffic lights).
(11). Shielded safety door closing time: 3.2±0.1s～4.0±0.1s adjustable within the range (adjust according to vehicle parameters).
(12). Shielded safety door reaction time: ≤0.3s (adjustable).
(13). Noise level (platform side): <70dB (A).
(14). Overall service life of the system: ≥ 8 years (under normal maintenance conditions).
(15). Average number of times of trouble-free use should be:≥1 million times.
(16). Power supply: DC 24V (12V).
(17). Load condition:
①.Passenger crushing load: 1500N/m anti-load (1.1m from the platform decoration surface, no permanent deformation of the structure).
②.Passenger impact: 1500N (1.125m height, working area 100×100mm, in 0.2S time, no permanent deformation of the structure).
③. Wind Load: Consider the wind pressure of Class 7 Typhoon 1000N/m2.
4. Technical Requirements for Major Components
The shielded safety door system consists of two parts, mechanical and electrical. The mechanical part includes a door structure and a door drive system; the electrical part includes a power supply system and a control system.
4.1 Door structure
(1). The material of the shielded safety door body should ensure good visual transparency and can withstand the weight and all loads of the platform shielded safety door.
(2). The design of the shielded safety door structure should be easy to install, replace and repair.
(3). When the shielded safety door is closed, the public area is separated from the driveway; when opening, it provides a walking path for pedestrians.
(4). The shielded safety door should be equipped with a manual device. When system control or station control fail, the driver or the station attendant can manually open the platform shielded safety door for the passengers to enter and exit.
(5). The shielded safety door should be provided with a locking device. It can be automatically unlocked during normal operation and can be manually unlocked in case of failure. When the shielded safety door is closed, the locking device can prevent the external force from opening the door; when the shielded safety door is opened, the locking device can be automatically released; When the door is opened manually, the locking device is automatically released.
(6). The shielded safety door shall be provided with an obstacle detecting device. The detector shall be capable of detecting a minimum of 10 mm (thick) x 40 mm (wide) steel plates. In the obstacle detection test, the thickness of 10 mm is placed on the straight line of the door stroke, and the width of 40 mm is placed perpendicular to the stroke line.
(7). When the shielded safety door is blocked, the door operator should be able to feel the presence of an obstacle and release the door. In the process of closing door, if there is an obstacle, the closing force is immediately released, and the door is paused for 2 s (the pause time is adjustable within the range of 0 to 10 s) and then the door will close again. If it cannot be closed after repeated three times, the shielded safety door stops and an alarm is issued, waiting for processing.
(8). The base of the shielded safety door shall be firmly welded with the foundation of embedded steel plate.
4.2 Drive system
(1). The door drive system is mainly composed of a driving device, a transmission device, a locking device, an unlocking device and a position detecting switch.
(2). Adopt Brush DC Motor.
(3). The speed regulation performance and output torque of the motor meet the requirements of the motion curve and dynamic curve of the door.
(4). The door drive unit is mainly composed of a DC motor and related components.
(5). The transmission is driven by synchronous belt. The timing belt should be made of flame-retardant material and the service life should be no less than 8 years.
(6). The motor adopts vibration-damping installation mode, which is easy to disassemble and repair.
(7). Locking and unlocking devices have both automatic and manual functions.
4.3 Power System
The shielded safety door is powered by a secondary load. The low-voltage power distribution system provides power supply AC220 (1±10%)V, rated frequency 50±0.5Hz. A specialized switch for power AC220 is provided for the platform shielded safety door system in the distribution box, which is placed in the equipment room of the station.
4.4 Control system
4.4.1 Composition and overview
The shielded safety door control system consists of a door control unit (DCU) group, a central interface board (including logic control unit and status monitoring unit) PSC, industrial computer, platform application software, communication medium and communication interface
(1). Set up a control system to control the corresponding number of shielded safety doors. Each control subsystem includes logic control unit, operation panel (CCP), control circuit and door switch.
(2). The shielded safety door status monitoring system should be bus type monitoring, which can be displayed through the operation panel (CCP) on the central interface board PSC. The fault status of each door unit can also be queried through the industrial computer and central station.
(3). The central interface board PSC communicates with the shielded safety door control unit (DCU) in a bus mode.
(4). The control system adopts RAMS design technology. The design of software and hardware should fully consider reliability, maintainability, availability and scalability. At the same time, the principles of modularity and redundant design must be followed.
4.4.2 Functions of the control system
(1) Control function
The shielded safety door control system has two modes: operation panel control and manual control.
Operating panel control: It is the control mode of opening/closing shielded safety door by the operator on duty through the operation panel CCP on the operating platform. Operation panel (CCP) can realize single door unit control
Manual operation: Manual operation is performed by the station staff on the shielded safety door. When the power supply of the control system fails or the operation mechanism of the shielded safety door fails, the station staff opens the shielded safety door on the platform side.
(2) Monitoring function
The internal bus control network of shielded safety door system adopts an open communication protocol, which transmits the status information of shielded safety door unit to the mother control panel through fieldbus. The monitoring information should include at least the opening/closing of the sliding door, the automatic/manual status and the door failure when it is displayed directly on operation panel (CCP) after logical processing.
4.5 Monitoring and management of work conditions
Shielded safety door control unit should be able to collect and alarm the following fault signals, and set up the necessary logic blocking and unlocking functions in the system.
(1) Door control unit failure and door machine failure
When the individual door control unit or door machine fails, the door cannot be opened or cannot be closed under the control of the system level and the operation panel, the door control unit performs an audible and visual alarm. At this time, the station staff turns the individual fault door from the automatic state to the isolated state, so that the unit is separated from the control system, the sliding door remains locked, and the passenger enters and exits through other sliding doors. Maintainer detects the corresponding information through the laptop interface, and then put it into use after troubleshooting. The normal operation of the entire control system is not affected by the withdrawal of individual fault door unit from the control system.
(2). Power failure
When the power supply of door control system fails (including control power failure, drive power failure and individual drive motor power failure), the system should carry out audible and visual alarm, and the corresponding detailed fault information can be queried through maintenance tools.
(3). Network communication system failure
The communication network of the system consists of fieldbus and some hard wire transmission circuits. When Fieldbus fails, the system should carry out audible and visual alarm.
(4). Internal bus control network of shielded safety door system
The internal bus control network of the shielded safety door system adopts an open communication protocol, which uploads the status of sliding doors to the control panel (CCP) of the control room through the door controller. On the control panel (CCP), the status, faults, control network faults and power supply faults of each sliding door unit can be inquired.
5. Interface of related majors and system
5.1 Interface of signal lamp control
Includes arrangement of shielded safety door, opening/closing time, the installation of the door control system and the signal lamp communication control device.
5.2 Interface of civil engineering
The interface between the shielded safety door and the civil engineering is inside the sidewalk. The interfaces are as follows:
(1). The base of the shielded safety door shall be firmly welded to the foundation of embedded steel plate.
(2). The external pipeline of the shielded safety door system is buried by the civil works. It is necessary to supervise the correctness of the installation of the pipeline location.
(3). Design, supply and installation of various components connected to the civil works at the intersection.
5.3 Interface of distribution box
Content of Interface: The shielded safety door system has a special power supply AC220 switch for the shielded safety door system in the equipment distribution box at the intersection.
Location of Interface: Distribution box shielded safety door system power supply AC220 switch.
5.4 Interfaces of other intelligent systems
Content 1 of Interface: Reserve some interfaces to which the shielded safety door system is connected to the switch, the number and location of interfaces are planned by the design unit.
Content 2 of Interface: The switch in the cabinet between devices.
Right single door
Electrical control unit
Back of wrapper sheet
Glass frame combination
Timing belt adjustment block
Timing pulley drive wheel
Right wrapper sheet
Bottom sealing plate
Guide wheel assembly2
Roller guide fixed block
Right 25-2-wheel guide
Timing belt clamp
Rubber end cap (male)
Tail wheel assembly1
Rubber Protection (male)