Do You Know The Rails Need To Be Stretched
May 29, 2021| Do you know the rails need to be stretched?
When you focus on the computer for a whole day, do you naturally want to take a big stretch to relieve your fatigue? After stretching, we often feel refreshed and comfortable. But do you know that steel rails also need to be loosened?
By the end of July 2020, China's railway operation mileage has reached 141400 km, including 36000 km of high-speed railway. Crisscross railways, from inland to coast, from desert to rainforest, from city to countryside, form a steel skeleton extending in all directions. However, due to the different environment and temperature, the railway line is also undergoing various tests. In fact, the rail will produce stress with the change of temperature in the process of use. Once the stress exceeds the limit value, it will cause the long steel rail to accumulate excessive temperature force, swell the track in hot summer, break the rail in cold or pull the rail joint and other accidents.
In order to prevent accidents, the excessive temperature stress in the long rail must be released. How to release stress? In the past, the temperature release method was used, and the stress release work was difficult to be completed in time according to the construction requirements. Now it's not the same. Power assisted release has become the most practical operation method at present. It can be forced release in a larger range below the locked rail temperature without the limitation of temperature and blocking time, which greatly improves the work efficiency and is conducive to transportation production. How does it work? It is usually necessary to cut off the rail section to be treated; Then the broken ends of the rail are pulled together by the stretcher; In the process of pulling up the broken end of the rail, the rail is acted by the rail Collider to ensure that the stress on the rail section is completely released. Now I'm relaxed and feel refreshed.
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The specific operation will be explained in the following video. Follow me and learn more about railway maintenance. See you next time
