Pneumatic doors are converted into electric doors: Shanghai Metro retrofits the doors of some old models to improve operational reliability

[Source] Shanghai Metro Maintenance and Guarantee Co., Ltd. Vehicle Branch, Group Company Party Committee Party Building Work Department

[Editor] Wu Kanjun, Samuel

Recently, Shanghai Metro Rolling Stock Company has launched an important renovation project aimed at improving the reliability of train operations. The focus of this project is to convert the pneumatic doors used in some old models of Shanghai Metro into electric doors to enhance the functionality and safety of passenger compartment doors.

As a key component for the safe operation of the main line of subway trains, the passenger compartment doors of Shanghai subway trains need to be updated and improved due to their large number and frequent opening and closing. At present, Shanghai subway passenger compartment doors are divided into two types: electric doors and pneumatic doors. Among them, the models using pneumatic doors include 01A01, 01A03, 01A04 (some carriages) and 02A01 trains. Compared with traditional pneumatic doors, electric doors have the characteristics of high reliability, few safety hazards and strong functionality. By converting the pneumatic doors of old models into electric doors, it can be better combined with the intelligent operation and maintenance system to achieve real-time monitoring and accurate dispatch of train door status.

This transformation project is led by the Technical Management Department of the Maintenance Vehicle Branch and works closely with the project engineering department and suppliers. However, modifications to vintage car doors are not always smooth sailing. During the actual modification process, the vehicle debugging personnel gave full play to their wisdom and professional knowledge to overcome various technical difficulties, and constantly used their wisdom and knowledge to overcome various difficulties encountered during the modification.

During the first circuit transformation process, the debugger After research, they found that the zero-speed signal of the door controller did not match the original car, causing the door to fail to open normally. By modifying the design, the zero-speed normally open contact was changed to normally closed. The problem of not being able to open the door properly was solved. Later, during the installation of hardware equipment, employees also encountered the problem of interference with the air pipeline in the passenger room. In collaboration with the overhaul contractor and the Connie manufacturer, we conducted a detailed investigation of the direction of the original car door pipes and proposed an improvement plan. At the same time, on the premise of ensuring that the relevant gas lines were not affected, we changed the original car fixing blocks and passed the inspection. The problem of equipment installation and gas pipeline interference was successfully solved by removing some useless pipelines and changing the direction of some pipelines.

The advantages of electric doors in train operation are mainly reflected in two aspects. First, the original pneumatic door is used in train operation, the execution component is a cylinder, and the compressed air of the entire vehicle is required Supply. This demand increases the pressure consumption of the vehicle\’s air supply and puts a certain amount of pressure on the normal operation of the air compressor. To solve the hidden problems and hidden dangers, the vehicle branch decided to transform the old pneumatic door into an electric door. This transformation not only reduces the demand for the vehicle\’s air supply, but also slows down the pressure consumption of the vehicle\’s air supply when the air compressor is working. At the same time, it also effectively reduces the occurrence rate of failures, improves maintenance efficiency, and increases the safety index of passenger travel.

In addition to the advantages in train operation, the electric door has also been improved in function. The electric door has an anti-pinch function, which requires that the door must be closed in place before it can be removed. In addition, the door leaf external and internal cut-off function has been added, eliminating the need to open the car The cover on the upper part of the door can be removed, which makes it easier for the driver to handle faults on the main line. In addition, a door controller is added to the electric door, which can cooperate with the fault upload function after the transformation of the overall MVB network of the future train to achieve intelligent operation. The combination of dimensions and the ability to obtain door status data in real time

The vehicle branch\’s upgrade and transformation of some old models from pneumatic doors to electric doors not only facilitates the daily maintenance and repair of trains, but also lays the foundation for the transformation of vehicle informatization, digitalization and intelligence. A solid foundation, and even more Improve train operation reliability

TIPS

Safe travel tips

03

During daily travel on Shanghai subway trains, people may be pinched by the door. In order to deal with this kind of safety hazard, the door anti-pinch function can effectively protect the safety of passengers.

When the train door closes and clamps an obstacle, it will try to close the door again. After five unsuccessful attempts to close the door, the door will be fully opened to prevent the door from completely clamping passengers. The original pneumatic door cannot perform this function. The modified one. Electric doors have undoubtedly been greatly improved in safety.

During the daily maintenance of the electric door, the operator will hold a specific obstacle block and place its long side vertically. Between the two door panels, conduct at least one obstacle detection function test on the upper, middle and lower parts of the door panel to ensure that the anti-pinch function of the train door is normal.

Foreign body

During the process of opening and closing the door, if there are foreign objects such as bottle caps in the door sill strip or between the doors, it will cause the door to fail Normally closed, resulting in the train being unable to operate normally.