Recently, freezing rain has suddenly fallen in Hubei, Hunan and other places.
Subject to inclement weather.
Multiple train delays and outages.
Many netizens raised questions.
Why freezing rain.
Will it affect the operation of the train?
The official answer is here.
What is Freezing Rain?
Freezing rain is a type of disastrous weather that is commonly found in early winter or late winter and early spring when it collides with an object with a temperature below 0 and freezes immediately. Raindrops below 0 can remain supercooled in air with a temperature slightly below zero, and their appearance is the same as that of ordinary raindrops, and when it falls on an object with a temperature below zero, it immediately freezes into a smooth and transparent layer of ice, which is called rime.
Severe rain rime can crush trees and power poles, interrupt communications and power supply, and affect road and rail traffic.
Freezing rain condenses into ice at an extremely fast rateThe lower it goes, the thicker and harder the ice becomesThe speed of human protection is difficult to keep up with the speed of its icing.
Why freezing rain.
Will it cause the train to be suspended and delayed?
At present, most trains rely mainly on electricity, and each car will have a device that extends upwards called a pantograph. The pantograph is connected to the catenary of high-voltage electricity to transmit power to the train.
However, under the influence of freezing rain, both the pantograph and the catenary froze. Under the barrier of ice,Poor contact between the pantograph and the line produces an arcThat is, the fire on the top of the train that we see.
At the same time, the ice of the track brought by freezing rain will cause the friction between the train and the track to be significantly reduced, which will affect the traction and braking performance of the train, so that the train will take longer and travel a larger distance when accelerating and braking, and increase the risk of train delay.
How is the railway sector responding?
Carry out de-icing operations
China Railway Wuhan Bureau Group organized more than 2,000 staff to carry out 24-hour snow and ice removal on catenary, lines, turnouts and other equipment. The railway power supply department organizes employees to use de-icing rods to manually de-ice for the first time, and the electric power department clears the surface snow around the turnout cracks by manual cleaning, and at the same time uses spray gun melting, shovel shoveling and other methods to clean up the ice covering the turnout and rail.
Timely investigation of hidden dangers
The power supply and electrical affairs departments comprehensively check the status of equipment and facilities, especially strengthen the hidden danger investigation of catenary, turnouts, switch machines and other equipment; The maintenance department conducts key inspections on the pantograph, and replaces the sliding slats that are worn and burned and do not meet the requirements.
Spare diesel locomotives were added
The locomotive maintenance department arranged 48 diesel locomotives to be on standby at any time to do a good job of emergency traction.
Increase the number of people on duty
For the passenger sections with large passenger flows, such as Hanyi and Hanshi, the passenger transport department has reserved sufficient personnel in Hankou, Xiangyang East, Yichang East and other places to fully prepare for the large passenger flow.
Each station has also strengthened linkage with local buses, subways, taxis, online car-hailing and other units, done a good job in transportation connections, and adopted measures such as extending the operating hours of public transportation and encrypting the frequency of departures, so as to smooth the "last mile" of passenger travel.
*: China Railway).