Electrical control principle and process of electronically controlled pneumatic plug door Duan Shiming, Li Yanqun. Chen Guanghu Nanjing Puzhen Vehicle Factory, Nanjing 210031, Jiangsu Province, with the development of railway rolling stock industry in the past 10 years. The operating speed of the aircraft is constantly increasing. The increase in operating speed will inevitably put forward higher requirements for the sealing performance and the performance of the umbrella. Since 1997, the 25-type new railway passenger car and some EMUs have gradually adopted electronically controlled pneumatic sliding doors to improve the sealing and safety of passenger cars. The door is usually welded by aluminum profiles and filled with an insulating flame retardant honeycomb material. A special sealing rubber strip is set in the periphery. + Only has good strength and rigidity, and the sealing and safety are better than the traditional folding door. 1 Door composition and control requirements The electronically controlled pneumatic plug door is mainly composed of the electric system pneumatic system drive mechanism door panel locking mechanism and the flipping pedal. The main working process is as follows: When the door closing signal is issued, the door closing solenoid valve acts, without the bar The cylinder pushes the drive mechanism to perform the door closing action, and the ankle flips the stowage to facilitate the passenger to get on and off the vehicle. However, considering the limit of the locomotive and the vehicle, the foot should be turned upside down when the vehicle is running. When the door is closed, the locking mechanism will be locked. When the door opening signal is issued, the locking mechanism is opened, the door opening solenoid valve is actuated, and the driving mechanism is driven by the barless cylinder to perform the door opening action, and the foot is turned over and dropped. Therefore, the main 4.3 heating and heating test of the electronically controlled pneumatic sliding door electrical control system is in progress for verification, and the structural performance of the in-vehicle heating system of the type of viscous oil tank is carried out in Xi'an Vehicle Factory in 1998. The thermal efficiency comparison test of the 0 type internal heating viscous tanker and the 17 type external heating viscous tanker. The test results show that under the premise of the same condition of steam supply pressure and steam supply, the heating rate of the Type 178 tanker is increased by 59.6 compared with the Type 17 tanker, and the heat exchange effect between the heating system and the vehicle medium is better. The task is the processing and control of the switch door signal. The specific contents are as follows: the electric control and the manual switch are provided inside and outside the car. The function of each door is to have the function of centrally opening the same side door after the station arrives at the station; To close the function of all the doors, in order to ensure the safety of the ride, the door in the open state should automatically perform the electric control pneumatic closing. In the process of electronically controlled pneumatic closing, if an obstacle is encountered, it should be automatically converted to the open state. After the delay, fixed, and after, the door will be automatically closed. After the door closing command is executed, in order to prevent the door from being completely closed and the ankle not being closed, it should be automatically detected and have a fault report. In an emergency, the door can be opened manually. The workflow of the door 1. 2Electrical control working principle There are 4 doors in each car. There are 1 door control unit at each end of the car to control the 2 side doors of the corresponding end. The door control unit of the new Dawning EMU adopts 800 company-specific door controllers. The Pioneer EMU door control unit adopts SIEMENSSIMATICS7200PLC package, 224 and 6-point input 16-point output 223 digital 1 expansion module for control. The door control unit has only 3232 communication interface. The whole train usually has one door centralized control unit, the new Dawning No.1 motor. 1. The relay has a contact circuit. The first zinc number is used in the 5th group. 171. Type is sticky. Since the trial production in 1997, the mountain is more than enough. Produced and put into use nearly 2,000 vehicles. Through the tracking investigation of the vehicle, the user generally reflects that the vehicle has small self-weight, heavy load, high heating efficiency, reasonable design, reliable performance, convenient maintenance, good economic benefit and social effect editing. Li Ping uses a microcomputer control unit, 0é’”Thereby, the door of the whole train is switched, and the failure of the door and the flipping foot is detected. The vehicle air cylinder can directly supply 400 kPa, 900 kPa wind source, and is adjusted to be relatively smooth and directly provided by the pressure regulating valve 48, or DC power supply, which is directly converted to 24, and the DC power supply is used by the control circuit. Door electrical control 2.1 Main functions 2.1.1 Bicycle whole train switch door The whole train door centralized control unit realizes the electric control pneumatic switch door of the whole train to each car through the centralized control line. Each car can send a switch door signal to the door control unit through the switch door lock switch inside and outside the car to realize the opening or closing of the corresponding door. The signal sent by the centralized control unit takes precedence over the signal from the switch of the vehicle. When the door control unit receives the door closing signal, the buzzer alarms, the two-way door solenoid valve acts, and the barless cylinder drive mechanism drives the door to close the door. At the same time, the ankle cylinder realizes the ankle flip by the mechanical linkage mechanism. When the door is closed, the locking cylinder, together with the locking mechanism, locks the door. When the door control unit receives the door opening signal, the buzzer alarms, the lock cylinder and the locking mechanism unlock the door, the two-way open door solenoid valve acts, and the barless cylinder drive mechanism opens the door. During the door switch process, the one-way stroke is about 730mm, the running time is about 38,68, and the door opening and closing speed can be adjusted by the one-way throttle valve in the pneumatic system. 2.1.2 Automatic closing when the vehicle speed exceeds 5kmh To ensure the safety of the ride, when the train speed exceeds 5, the door in the open state should be able to automatically perform the door closing operation. A permanent magnet type magnetoelectric sensor is usually provided at the end of the axle of the vehicle. The induction gear rotates synchronously with the axle, and the top tooth valley alternately passes the sensor at a distance of 0.2 mm from the gear, and the sensor detects the corresponding pulse signal by cutting the magnetic field line. The speed sensor transmits the speed information to the vehicle speed sensor 1. The vehicle opens the door signal; 2. The vehicle interior door closing signal; 3. The shielding anti-squeezing signal; 4. The door completely closes the signal; 5. The door does not close the signal. ; 6. ankle failure signal; 7. emergency opening signal. After the analysis, the vehicle sends a door speed signal exceeding 51 scoops to the gating unit, and the gating unit automatically performs the door closing operation. When the vehicle speed exceeds 5, except for the emergency lock signal, the other electric and manual modes cannot open the door. 2.1.3 anti-extrusion function Generally, the airbag is installed in the sealing rubber strip on the closing side of the door panel to detect the pressure shock signal or the change of the working pressure of the bar without the bar when the door is closed to realize the anti-squeezing function of the door. When the electronically controlled pneumatic closing door encounters an obstacle, the rubber strip encounters a sudden impact squeeze. A sudden pressure will be generated in the airbag, and the under-pressure will cause the phase to close and move toward the door. The element emits a squeeze signal; likewise, when the barless cylinder working pressure exceeds the set value, it is usually 100, 150. The corresponding pressure sensing device will send a squeeze signal to the gating unit. After receiving the squeeze signal, the gating unit will switch the door to the automatic open state, then delay 23, 58 and then automatically close the door again. In order to prevent the door from being closed after the door is closed due to the squeezing, a special shielding switch is provided, and the train transportation hall makes the position of the full stroke 9 poles, 9, when. The switch will send a signal to the gating unit that shields the anti-squeezing function, thereby ensuring that the door fork is closed and will not be reopened. 2.1.4 Door closing position Ankle flip detection To ensure the safe operation of the train, to prevent the door Zhu off due to various reasons, each door is equipped with a door closing switch on the locking mechanism. The switch has a normally open normally closed contact, which respectively corresponds to the signal that the door is completely closed and the door is not closed. When the state is not closed, the corresponding door and centralized control unit have corresponding fault fingers. When the door is closed, the ankle cylinder pushes the mechanical linkage to flip the ankle. The ankle is flipped into place and the switch detects if the ankle has been flipped into place. 2.1.5 Emergency manual door opening 51 speed signal shielding, at this time, the electric control and manual direct opening can not open the door, so set the emergency lock. This lock can be rotated in an emergency, this lock triggers the corresponding switch and sends an emergency status signal to the gate unit. The door control unit powers off the door closing solenoid valve, and simultaneously locks the cylinder to push the locking mechanism to unlock. Manual opening can be achieved at this time. 26 winter anti-freeze function Because the railway only records the camp all over the fierce northeast and northwest regions, the winter ambient temperature is less than 300. In order to solve the switch door failure caused by frost, an antifreeze device is installed at the easy-to-icing part under the door. The inside of the device is a positive resistance temperature heating material, which can automatically adjust its own power according to the external temperature change, and has the advantages of saving electric energy and heating uniformity. Left door sensor and switch door control unit 集ä¸2 centralized control unit right door sensor and switch right door sensor and switch hard low foaming, 0 plate in, type 65 box car application Jin Zongliang Qiqihar Railway Fengjin 1臬3壬The company's thermal process room. Qiqihar, Heilongjiang 161002 With the development of China's railway transportation industry and the improvement of people's living standards, people have put forward higher requirements for the transportation environment and transportation quality of railway wagons. It is urgent to improve the level and grade of vehicle interior materials. The following factors should be considered when selecting the materials for the railway box car. 1 The quality is light and the decoration is good; 2 It is easy to maintain and maintain the aging pollution light; 6 It can not only replace the steel, but also recycle and protect the ecological environment. Consider the above aspects of the station factory. In the interior decoration of the type 1 shed. The hard low-foaming 1 sheet has been well applied and has achieved good results. 1 The main characteristics are hard and low foaming, and the treatment is exhausted (2) Kenting (10), non-polluting and environmentally friendly materials that can be recycled. Its main characteristics are 1 density, which is beneficial to reduce the weight of the truck; 2 good flame resistance, oxygen index reaches 30; 3, high service, strong impact resistance; 4 she is high, wear resistance is good, not easy to scratch; 5 decoration Good sex, not only can be made into a variety of colors, and can be processed by various methods such as nail planing, sawing and welding; 6 anti-aging performance, long-term use, no discoloration, no deformation; 7 good weather resistance, at 40,750 It can be used for a long time and can maintain various physical and chemical properties; 8 index has good stability; 9 has good corrosion resistance and can resist corrosion of most chemical products; 10 low water absorption, low thermal expansion coefficient and good dimensional stability With thermal insulation and other characteristics; 12 has good insulation and dielectric properties. The performance of the hard low-foaming sheet refers to the private product. 1 item performance index test standard number tensile strength MPa elongation at break impact strength kJm2 Shore hardness U-dimensional softening point t heating dimensional change rate bending elastic modulus MPa bending Strength MJPa water absorption rate nail holding power N oxygen index 2, the application of the model car from the aspects of decorative economy and practicality, the roof lining is thick 5, 0 plate into the decoration 1. The side wall of the inner end wall of the car is affected by factors such as the collision of goods and the like. Therefore, it is decorated with 10 plates with a thickness of 15. Considering that the forklift may collide with the board when loading and unloading the cargo, a thick gold is installed in the lower part of the shoulder wall of the end wall. The end of the guard 3 is connected to 10 trains by 1 train, and 4 doors of each carriage are calculated. Fan door. As a result, the reliability of the door and its control system is particularly important. After several years of operation and practice, it proves that the currently used electronically controlled pneumatic plug-in door system works stably and works well, and can better adapt to the current needs of railway passenger car speed + break improvement. 1i 焉 Guizhen, Song Zhengfei. Automatic sliding door railway vehicles for railway passenger cars, 2000, 38 200 Programmable Controller System Manual 2. Shanghai Siemens, 2000. 31 type anti-skid device instruction manual 2. Ministry of Railways Science Research Institute, 1999. Editing He Fang's next big song, performance of air spring without bolster bogie and development of structural parameters of tilting mechanism and guiding mechanism. Research on bogie performance high temperature hot metal water soft transport technology. Structural characteristics and body of 04 type alumina powder tanker Jingqiang should analyze the operation of the anti-type high-speed light-duty wheel and the protection measures of the trailer power supply system in the proposed 270kmh electric vehicle group. The current situation of the domestic and foreign box cars and the development of the technical and economic effects of the rolling bearing of railway wagons Traffic signals, also known as traffic lights, are devices that control the flow of vehicular and pedestrian traffic at intersections. They serve several functions and have various purposes: Warnning Light,Traffic Safety Product,Road Sign,Traffic Safety Yangzhou M.T. New Energy & Lighting Group Co., Ltd. , https://www.mtstreetlight.com
1. Regulating traffic flow: Traffic signals help regulate the movement of vehicles, ensuring a smooth and organized flow of traffic. By assigning specific time intervals to each direction, they prevent chaos and congestion at intersections.
2. Ensuring safety: Traffic signals play a crucial role in ensuring the safety of both motorists and pedestrians. They provide clear indications of when it is safe to proceed and when to stop, reducing the risk of accidents and collisions.
3. Prioritizing traffic: Traffic signals help prioritize traffic movements by allocating green light time to different directions based on traffic volume and demand. This ensures a fair distribution of right-of-way to all users, improving efficiency and reducing delays.
Overall, traffic signals are an essential tool for managing traffic, ensuring safety, and improving the efficiency of transportation systems. They help create order, control traffic flow, and provide clear instructions to all road users, contributing to a safer and more organized road network.