Large railway marshalling stations are located in all directions of railway hubs, such as Fengtai West Railway Station Zhengzhou North Railway Station Xuzhou North Railway Station... wait
Railway marshalling station
Marshalling station marshalling train by shunting machine pulling in and out, decomposition and combination of more than a dozen cars to pull a trip is also cost-effective, if one or two wagons are also used to pull the locomotive to send not only cumbersome, stand-alone runway is also wasteful, in practice, we have figured out the economic and efficient operation method "walking".
There are usually two types of walking: a simple small-scale walk and a "hump walk"
"Hump walking" is to specially plan a few or dozen special lines on the side of the marshalling station, and build a "hump" high at the entrance of the concentrated walking line as a boost platform.
The circle in the picture is the "hump"
Hump - is the economic rapid decomposition of marshalling freight train facilities, the general marshalling station has, but the facilities are different everywhere, so the hump is divided into simple hump, non-mechanized hump, mechanized hump, semi-automatic hump and automated hump.
The hump is an important facility of the marshalling station, which artificially raises the railway at the appropriate position of the flat line of the marshalling station (generally located at the head of the shunting yard), slowly uplifts the railway like a camel hump of two meters high, using the gravity of the vehicle and the potential energy generated by the slope of the hump, supplemented by the locomotive thrust to economically and quickly disintegrate the marshalling train.
"Simple Walk":
Shunting machine top more than a dozen sections of the car box to be grouped, accelerating to the pre-walk section, the connector has long been in accordance with the dispatching order, orderly lift the automatic hook lock pin, when the front section of the vehicle to be walked into the predetermined section of the moment, the front of the car suddenly brakes, the use of inertia to take out the car skin that has been unhooked, the decoupled car box with a huge inertia to slide, has long been waiting in the predetermined position with a steel fork to end the iron shoe (brake stop) The production mobilization will skillfully clamp the iron shoes firmly stuck on the rail in front of the walking vehicle. With the harsh sound of metal rubbing, the box that presses on the blocked iron shoe will obediently and slowly stop.
The "iron shoe" on the track that blocks the wheels
"Hump Walk"
The hump includes facilities such as push section, slip section and summit platform.
Push part - refers to the line range where the first hook of the vehicle is located at the peak when the first hook of the vehicle is located at the peak. The push part is set up so that the vehicle can get the necessary potential energy, and the hook is pressed tightly to facilitate the removal of the hook. The shunting machine slowly pushes the pre-walked vehicle to the hump platform, and the connector takes the vehicle hook that has been decomposed according to the walking operation book, and pushes the vehicle that has been untied to the predetermined line to stop.
Slip section - the line range from the peak to the head of the marshalling field 100 meters (mechanized hump) or 50 meters (non-mechanized hump or simple hump) after the head of the marshalling field. This length is also called the hump calculation length, and the end of the calculated length is called the hump calculation stopping point. Because each shunting line police sign is not in the same horizontal position, each shunting line has a calculated stop point.
Peak platform - refers to the flat area where the push part is connected with the slip part.