Li Zhiguo.
At present, it is the peak of the Spring Festival, and railway stations around the country welcome passengers from the south to the north. In addition to the lively Spring Festival weather, there is also a group of young people in the cold weather, guarding the safe road of the Spring Festival.
At 1 a.m. every day, people who have been busy all day have already fallen asleep. At this time, in the Suzhou North Station of the Beijing-Shanghai High-speed Railway, the sound of the machine was rumbling, and the rail "grinders" of the fifth class of the first workshop of the mechanized grinding workshop of the Shanghai Bureau Group of China Railway Shanghai Bureau Group were inspecting the grinding car before leaving the train.
Six grinders in orange protective suits and helmets, holding maintenance hammers, are in place at their posts.
Report to the foreman, the No. 1 position is inspected and can be driven. "After the inspection of position 6, you can drive. ”
Woo......With the sound of a flute, the grinding truck slowly drove towards the construction site.
Tonight, our team is responsible for the rail grinding and repair operation between 1,250 kilometers and 1,260 kilometers from Suzhou north to Kunshan south of the Beijing-Shanghai high-speed railway. Pu Qiye, the 28-year-old person in charge of construction and the leader of the fifth shift of the first workshop of mechanized grinding of the maintenance section of Shanghai large machine, said.
The Beijing-Shanghai high-speed railway is one of the busiest transportation arteries in the Yangtze River Delta region. During the Spring Festival, the density of trains increases, the number of trains increases, under the repeated action of the dynamic load of the train at a speed of 350 kilometers per hour, the rails at both ends of bridges, turnouts and curves are prone to wavy wear and side friction and other diseases, affecting the stability of train operation and passenger comfort. At this time, it is necessary for the grinder to use the intermittent period of the high-speed rail suspension at night to polish and repair the rail, restore the rail contour size, and make the wheels and rails form a reasonable contact surface to ensure the speed and stability of the train.
No. 1 slot is there! Enter mode 51, and the swing angle of each grinding head is in the correct position! He Bin, the grinder sitting in the main operation position, used the walkie-talkie and Pu Qiye to confirm the grinding operation mode, while concentrating on observing the operation of the grinding equipment on the operation screen.
After confirming that the equipment was operating normally, Pu Qiye issued a grinding instruction: "Go to the knife!" Start grinding! ”
He Bin slowly pushed the handle, dropped the grinding wheel, and the moment the knife was lowered, the steel sparks splashed, and the sound of wheel-rail friction was accompanied by the roar of the machine.
Pu Qiye is the "leader" of this group of grinders, since joining the work in 2019, he has always taken learning technology as his professional pursuit, starting from the operator, and later served as the deputy commander, commander, and squad leader.
Rail grinding seems to be a 'rough job', but it can not tolerate a little sloppy, grinding shallow can not remove the root of the disease, grinding too deep and will affect the life of the rail, must ensure that the rail contour error after grinding is less than 02 mm, which is equivalent to the thickness of 2 sheets of A4 paper, so that the high-speed rail can run more smoothly and safely. The previous hot spread on the Internet that 'coins on the high-speed rail do not fall' has a share of our credit. Pu Qiye said proudly, "I actually like polishing work, which is not only technical, but also tests people's patience." ”
At 3 o'clock in the morning, after the second grinding work, Pu Qiye got out of the car, leaned over and half-knelt on the cold steel rail, and used the light of the flashlight to check the track surface of the polished curved section.
The curved ultra-high strand band is bent, and the grinding wheel angle needs to be adjusted to strengthen the grinding. Pu Qiye said to the operators on the side.
Under the order, the crew quickly carried wrenches and other tools, adjusted the angle of the grinding wheel, re-polished the curved part, and eliminated the bent light band, and the contour size met the acceptance standards.
Pu Qiye told reporters that due to the centrifugal force of the train, the outer rail of the curved section is prone to uneven wear and tear and abrasion under the high-speed impact of the train, which is the key point of rail grinding control and an important factor affecting the comfort of passengers. After grinding, the curved band area appears, which is the manifestation of incomplete grinding of the disease, and it is necessary to readjust the angle of the motor grinding wheel, and then repeatedly polish until the track surface contour requirements are reached.
At about 4 o'clock in the morning, the grinding work was finished. When they got out of the car, a layer of black dust was adsorbed on the original white masks of the sanders, and a layer of black stains were also covered in the overalls. "During the grinding operation, the high-speed rotating grinding wheel rubs violently against the rail, and the iron dust generated is flying everywhere, and the workers must wear thick dust masks to avoid inhaling the iron ash. Pu Qiye explained.
After nearly 4 hours of grinding operations, the grinders completed a total of 94 km of grinding tasks.
On the way back to the station, Pu Qiye took out his mobile phone and looked through the wedding photos. "Squad leader Pu held a wedding a few days ago, because of the heavy task of grinding the rails in the Spring Festival and the shortage of personnel, he took the initiative to give up his marriage leave and return to work. He Bin on the side said.
Like us, the more busy we are at this time, and we rarely have time to spend with our families. We must use our own efforts to polish the business card of 'China's high-speed rail' more brightly, so that the high-speed rail trains can send the majority of passengers to their destinations safely." Pu Qiye said.
This year's Spring Festival, the passenger flow of the Yangtze River Delta Railway is expected to reach 89 million. Pu Qiye led this group of rail grinders to run along the Yangtze River Delta Railway every day to polish rail diseases. They work day and night, working overtime, and carefully guarding the safe journey of passengers during the Spring Festival.