Intelligent equipotential switching device for platform door

Abstract

The utility model discloses an intelligent equipotential switching device for a platform door, which comprises a controller, an equipotential insulation continuous monitoring module, a station machine, a special power supply, a current continuous monitoring module and an equipotential switching box, the equipotential insulation continuous monitoring module is connected with the controller, the station machine is connected with the controller, and the special power supply is connected with the current continuous monitoring module. The special power supply is connected with the controller, the current continuous monitoring module is connected with the controller, and the equipotential switching box is connected with the controller and the current continuous monitoring module. The utility model relates to the field of platform door potential switching design, in particular to an intelligent equipotential switching device for a platform door.

Description

Technical Field

[0001] The utility model relates to the field of platform door potential switching design, in particular to an intelligent equal potential switching device for platform doors. Background Art

[0002] In the design of urban rail transit platform door systems, because there is a potential difference between the rails / vehicles and the platform doors (the rails serve as the negative pole of the traction return current), in order to avoid the voltage difference between the rails / vehicles and the platform doors and prevent the step voltage from being generated when passengers enter the vehicle, causing safety hazards, the rails and platform doors are generally connected with cables to achieve equal potential.

[0003] The current engineering solution adopted by the industry is to insulate the platform decoration layer and achieve equipotential connection between the platform door and the rail (train). However, in fact, due to the limitation of construction technology level, the insulation of domestic subway platform door system generally cannot meet the operation requirements.

[0004] However, it was found in actual operation that when the insulation value is reduced, the connection of the equipotential line will cause current leakage through the weak insulation of the platform door, resulting in sparks. On the one hand, this will cause fire hazards, and in serious cases, burn the platform door control cable, causing the platform door to lose control. On the other hand, a large amount of stray current will enter the station, resulting in long-term electrical corrosion, which will affect the life of related buildings and equipment facilities.

[0005] According to research, since the opening of the subway in various cities in China, platform doors have repeatedly experienced ignition. In response to the above problems, subway companies in various places have held expert analysis seminars in the platform door industry many times. There are two opinions: one is to keep the equipotential line between the platform door and the rail connected; the other is to simply not connect the equipotential line and use an insulating film on the outer surface of the platform door structure to prevent passengers from touching it and forming a voltage difference. The equipotential line connection cannot solve the ignition problem, but not connecting the equipotential line at all and relying only on the insulating film will often cause the insulating film to be damaged due to passengers. No matter which solution is adopted, there are certain defects and risks.

[0006] These are the problems that our proposed solution aims to solve.

[0007] 1) Case

[0008] Case 1: In 2016, an elderly man with a pacemaker was boarding a subway train on a certain line in City A. Due to the failure of the door insulation, when the passenger stepped from the platform door to the train, the door column and the threshold were not insulated, resulting in a potential difference and instantaneous discharge, causing injuries and sending to the hospital for emergency treatment. This caused a certain social impact. Subsequently, the platform door manufacturers of multiple lines were urgently recalled for insulation rectification and treatment.

[0009] Case 2: Statistics from City B show that more than 90% of stations on some lines have failed insulation on platform doors. In 2019, a passenger was carrying a rod-shaped metal object on the subway. During the boarding process, the rod-shaped metal object caused the platform door and the train to overlap, causing the rod-shaped metal object to melt. The molten metal splashed and burned the train door and platform door, injuring the passenger.

[0010] In addition, from 2018 to date, there have been more than 10 fire ignition incidents caused by metal objects such as luggage carried by passengers or wheelchairs coming into contact with the train body and platform door thresholds at the same time, resulting in two complaints, one compensation, and one fire being put out with a fire extinguisher after the fire was started.

[0011] The following table provides detailed descriptions of maintenance cases.

[0012]

[0013] At present, the common practice in the industry is to disconnect the equipotential device after the insulation of the platform decoration layer is reduced; to add insulating film and apply insulating paint in places where passengers can touch. The disadvantage of this solution is that it is costly and the effectiveness of insulation cannot be predicted, which brings great hidden dangers to operation and maintenance safety. If the equipotential is not connected, when the platform door is inside

[0014] When the control line is damaged, the platform door will be under high voltage, endangering the safety of passengers.

[0015] Since large currents are often more obvious at the moment when trains enter or leave the station, the equipotential system can be set up according to the following ideas: connect the equipotential when it is needed to ensure the safety of passengers; keep it disconnected at other times, or connect it to the system ground to prevent stray current from entering the station. At the same time, the insulation between the equipotential and the earth is continuously monitored, and the equipotential is switched in different situations of effective insulation, attenuation or failure. Utility Model Content

[0016] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an intelligent equipotential switching device for platform doors.

[0017] The technical solution adopted by the utility model is as follows: The utility model is an intelligent equipotential switching device for platform doors, including a controller, an equipotential insulation continuous monitoring module, a work station, a special power supply, a current continuous monitoring module and an equipotential switching box. The equipotential insulation continuous monitoring module is connected to the controller, the work station is connected to the controller, the special power supply is connected to the controller, the current continuous monitoring module is connected to the controller, and the equipotential switching box is connected to the controller and the current continuous monitoring module.

[0018] Furthermore, the controller is provided with a platform door command switch.

[0019] Furthermore, a manual / automatic switching switch is provided on the controller.

[0020] Furthermore, the controller is provided with an equipotential switching switch.

[0021] Furthermore, a status indicator light is provided on the controller.

[0022] Preferably, the industrial computer and dedicated power supply are located in the platform door equipment room.

[0023] Preferably, the present design is connected to the door unit, rails and platform door terminals via cables.

[0024] Preferably, the equipotential intelligent control system is equipped with two sets of wires: data upload and status acquisition. The equipotential intelligent control system can store the platform door equipotential data and control records on-site in the industrial computer, and can also upload them to the corresponding demand equipment through the network equipment.

[0025] Preferably, the controller receives the equipotential insulation continuous monitoring signal and the door opening and closing command, and issues a switching instruction. There are three actions: connecting the rails, disconnecting the rails, and connecting the system ground. The working logic is as follows: Figure 3 shown.

[0026] Preferably, the wiring arrangement diagram is as follows Figure 3 shown.

[0027] Preferably, regarding device configuration

[0028] 1) Dry contact: the equipment cabinet is equipped with seven dry contact signals: "up platform door connection", "up platform door grounding", "down platform door connection", "down platform door grounding", "switching equipment failure", "equipotential insulation signal" and "current signal".

[0029] 2) Configure an RJ45 network port for communication, using the modbus-TCP / IP protocol to transmit information related to the switching device.

[0030] 3) Optional wireless 4G network module, using 4G network, transmits the status of related equipment to the control room or data center. In the control room or data center, optional monitoring terminal is used to display and view related status information, which is composed of server, display device, UPS, sound and light alarm equipment, etc. (a set of central monitoring terminal can be set up for the whole line). Wireless transmission of monitoring data, the system transmits the monitoring data to the ground server through 4G network (optional).

[0031] 4) Remote data monitoring: the system can be viewed through various terminals such as data processing center and mobile phones.

[0032] 5) Local storage of monitoring data.

[0033] 6) Over-limit data is automatically pushed. When the system finds that the current exceeds the limit, the alarm information is automatically sent to the server.

[0034] 7) Maintenance personnel receive alarm information and handle problems immediately.

[0035] 8) Unpacking detection function: if the field control equipment is opened, the information will be automatically sent to the data control.

[0036] 9) Record opening and closing time (optional).

[0037] The beneficial effects achieved by the utility model using the above structure are as follows:

[0038] The product has the following features:

[0039] 1) After the train stops, keep the equipotential connection between the platform door and the rails open;

[0040] 2) After the doors are closed, the platform doors are disconnected from the rails and left hanging in the air, or connected to the system ground. The platform doors are only connected to the rails when passengers get on and off the train;

[0041] 3) Continuously monitor the insulation performance of the equipotential system, and implement equipotential switching after analysis and judgment by the controller;

[0042] 4) With insulation failure alarm (can be specific to the unit) and current abnormality alarm;

[0043] 5) A dedicated industrial computer is provided to realize recording, storage and historical data query. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the hardware structure of the intelligent equipotential switching device for platform doors proposed in the utility model;

[0045] Figure 2 The working logic of the intelligent equipotential switching device for platform doors proposed in the utility model;

[0046] Figure 3 This is a schematic diagram of the wiring arrangement of the intelligent equipotential switching device for platform doors proposed in the utility model.

[0047] Among them, 1. Controller, 2. Equipotential insulation continuous monitoring module, 3. Workstation, 4. Special power supply, 5. Current continuous monitoring module, 6. Equipotential switching box, 7. Platform door command switch, 8. Manual / automatic switching switch, 9. Equipotential switching switch, 10. Status indicator light. DETAILED DESCRIPTION

[0048] like Figure 1 to Figure 3As shown, the utility model is an intelligent equipotential switching device for platform doors, comprising a controller 1, an equipotential insulation continuous monitoring module 2, a workstation 3, a special power supply 4, a current continuous monitoring module 5 and an equipotential switching box 6. The equipotential insulation continuous monitoring module 2 is connected to the controller 1, the workstation 3 is connected to the controller 1, the special power supply 4 is connected to the controller 1, the current continuous monitoring module 5 is connected to the controller 1, and the equipotential switching box 6 is connected to the controller 1 and the current continuous monitoring module 5.

[0049] The controller 1 is provided with a platform door command switch 7; the controller 1 is provided with a manual / automatic switching switch 8; the controller 1 is provided with an equipotential switching switch 9; and the controller 1 is provided with a status indicator light 10.

[0050] During specific use: the controller 1 controls the overall system, the equipotential insulation continuous monitoring module 2 monitors in real time, the current continuous monitoring module 5 monitors the circuit status in real time, different switches control different functions, and the status prompt light 10 has a prompt function.

[0051] It should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. Intelligent equipotential switching device for platform doors, characterized by: It includes a controller, an equipotential insulation continuous monitoring module, a workstation, a special power supply, a current continuous monitoring module and an equipotential switching box. The equipotential insulation continuous monitoring module is connected to the controller, the workstation is connected to the controller, the special power supply is connected to the controller, the current continuous monitoring module is connected to the controller, and the equipotential switching box is connected to the controller and the current continuous monitoring module.

2. The intelligent equipotential switching device for platform doors according to claim 1 is characterized in that: The controller is provided with a platform door command switch.

3. The intelligent equipotential switching device for platform doors according to claim 2 is characterized in that: The controller is provided with a manual / automatic switching switch.

4. The intelligent equipotential switching device for platform doors according to claim 3 is characterized in that: The controller is provided with an equipotential switching switch.

5. The intelligent equipotential switching device for platform doors according to claim 4 is characterized in that: The controller is provided with a status indicator light.

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