When the car travels for a certain number of kilometers, it needs to be maintained and repaired in the 4S shop, and the same is true for the train, and for the high-speed EMU, maintenance and repair are even more necessary. It is very necessary to make them travel through the motherland at a gallop during the day, and return to the garage at night to receive a professional "physical examination", improve the efficiency of independent maintenance of EMU faulty parts, and ensure the safe and punctual operation of EMUs.
The "4S shop" of the Harbin EMU maintenance workshop guarantees more than 100 pairs of high-speed rail trains in Haqi, Hamu and Mujia in the tube, and every staff member is a professional physical examination "maintainer", who fights on the front line all year round. Among them, Wang Tao, deputy director of the Harbin EMU maintenance workshop, set up a model worker innovation studio, leading colleagues to "see, hear, ask, and see" to explore and study new methods and technologies for EMU maintenance, and continuously improve the quality of EMU maintenance and on-site operation efficiency.
Before 2012, Heilongjiang Province, located in the northernmost part of China, was labeled as a "high-speed rail forbidden zone", with a severe cold of minus 35 degrees Celsius and ice and snow covering the entire line, and it is undoubtedly a world-class problem to run high-speed rail EMUs with a speed of more than 250 kilometers per hour under such climatic conditions. "In winter snowy weather, when the EMU runs at high speed on the line, the snow on the line will be rolled under the car, forming a large hard ice lump. Wang Tao said, "In the past, it took dozens of people to clean up an 8-car EMU at the same time, and the time was as long as 4 hours, which greatly affected the efficiency of the EMU. ”
In order to improve the efficiency of ice melting and snow removal of EMUs, Wang Tao proposed an equipment improvement plan on the original snow removal equipment and combined with actual needs, and newly developed a snow removal device for EMUs with Kazakhstan National Railway Technology Co., Ltd. - EMU ice melting and snow removal hot water pressurization device, which will be put into use during the Spring Festival transportation in 2024. "This device adopts technologies such as centralized and timely heating of water supply, constant temperature and constant pressure water supply, and secondary pressurization, which can realize rapid heating and secondary pressurization of water sources, which can meet the ice and snow removal operations of the entire EMU in the maintenance garage at the same time, and realize the efficiency of ice and snow removal increased by nearly 1 time, effectively ensuring the orderly development of the first-level repair operation of the EMU at night, and all the EMUs will run safely on time the next day, so as to meet the needs of online vehicles. Wang Tao said.
Nowadays, people have higher and higher requirements for travel comfort, and how to meet the quality and personalized needs of passengers is also Wang Tao's main direction. The electric tea stove in the bullet train car is a device that is frequently used by daily passengers. However, many car bodies are aging, and the water flow of electric tea stoves is slow, and the pressure is unstable, which affects the use of passengers. Wang Tao led the members of the studio, and after 8 months of repeated testing, finally developed the third-generation EMU electric tea stove board test platform. "The electric tea stove can monitor and control the hot water temperature, flow rate, and pressure at the water outlet. At the same time, if there is damage to other train electric tea stove parts and research and development of new accessories, the equipment can also play a good role in the learning and teaching of students. Wang Tao said. In the future, the EMU electric tea furnace board test platform can be applied to EMU trains to provide scientific and intelligent services for the majority of passengers.
In the R&D area of the Model Worker Innovation Studio, a "tank tracked vehicle" with "two pairs of big eyes" aroused everyone's interest, and everyone was curious about how the EMU and the "tank tracked vehicle" worked together. Wang Tao explained, "This is an intelligent robot developed by the team, and the EMU bottom inspection operation is very important to ensure the safety of high-speed rail operation, but the EMU parked in the storage yard, due to the close distance between the EMU bottom and the track surface, the physical activity space is relatively narrow, and when the bottom of the car is troubleshooting, the operator needs to lie under the car all the time, and it is very inconvenient to raise his head and turn back, and the troubleshooting and disposal time is long, which is easy to cause the train to run late." ”
In order to improve the efficiency of EMU online fault inspection, Wang Tao and the technical team developed an intelligent robot for EMU bottom operation based on on-site needs. The robot adopts advanced control technology, navigation technology, video acquisition and transmission technology. The crawler robot chassis is installed to enable smooth movement on the track. The high-definition probe on the equipment can collect images and video information at the bottom of the EMU from multiple angles, which can greatly improve the efficiency of the inspection of potential safety hazards under the EMU and facilitate the on-site operation of employees. "Originally, it usually took 1-2 hours to rely on us to check the hidden faults under the car on the online road, but now it only takes 10-30 minutes to use the intelligent robot to assist in the operation of the EMU with the bottom of the car, and the fault handling time is significantly shortened. Wang Tao said.