Rail switch is a line connecting device that transfers rolling stock from one track to another. It is also one of the weak links of the track. It is usually laid in large numbers at stations and marshalling yards. With the rail turnout price, you can give full play to the passing capacity of the line. Even if it is a single-track railway, by laying turnouts and constructing a fork line that is longer than the length of the train, the train can be split. Due to the large number of turnouts, complex structure, short service life, limited train speed, low driving safety, and high maintenance and repair investment, turnouts, curves and joints are called the three weak links of the track.

There are three basic forms of rail turnout price: line connection, crossing, and a combination of connection and crossing. Commonly used line connections include various types of single-type turnouts and multiple-type turnouts; intersections include vertical intersections and rhombus intersections; combinations of connections and intersections include crossovers and crossovers. Commonly used types of turnouts include single turnout, three-way turnout, cross turnout, crossover basin and crossover basin.

The most common is the ordinary single rail turnout price. It consists of three units: switch, connecting part, frog and guard rail. The switch includes a basic rail, a switch rail and a switch mechanism. When the rolling stock wants to turn from the A-strand road to the B-strand lane, manipulate the switch mechanism to move the switch rail. The switch rail 1 is close to the basic rail 1, and the switch rail 2 departs from the basic rail 2, thus opening the B-share road. The A-share road is closed, and the rolling stock enters the connecting part and transitions to the frog and guard rail unit along the guide curve. This unit includes a fixed frog center, a wing rail and a guard rail, and the function is to protect the wheels from passing through the intersection of the two trajectories safely.