Plastic dowel in sleeper manufacturers tell you that there have been countless wandering strangers on the boundless and extending railway tracks, riding the galloping train to run for life. Do you know how the train changes track on the railway, and then changes the running direction to let the wanderers go to different destinations? Today we bring you some common sense in this regard.

The inner side of the train wheel has a circle larger than the wheel, called the rim, which makes the wheel tightly stuck in the middle of the rail, which makes the wheel always run on the track without derailing, and is used to control the direction of the train. The train track change is not controlled by the train driver, but by the movable part of the rail, which is called a turnout.
Plastic dowel in sleeper manufacturers tell you that when there are small slits in the turnout, the wheel rim can pass through the small slits and travel in the direction guided by the outer rail. When the two tracks are in close contact, the rim is guided to travel in the direction of the inner track.
The switch is composed of three units: switch, connecting part, frog and guard rail. The switch includes the basic rail, the tip rail and the switch machine. In addition to single turnouts, there are also double turnouts, triple turnouts and multi-turn turnouts. The double-opened turnout is Y-shaped, that is, the two tracks connected with the turnout branch to both sides. The three-way switch is like a Ψ shape, connecting three strands at the same time, and two sets of pointed rails are controlled by two sets of switch machines. The duplex switch is like an X shape, which is actually equivalent to the combination of four sets of single switch and a pair of diamond cross. Plastic dowel in sleeper manufacturers tell you that in addition to this, there is also a crossover device, which is usually called a diamond crossover. It consists of two sets of acute-angled frogs and two sets of obtuse-angled frogs, but there is no switch, so the line cannot be switched between the strands. If you connect the upper two points and the lower two points of the X-shape of the compound crossover turnout, it is a crossover line. It not only can open more directions, but also occupies a small area, so it is often used in the station.
Each turnout has its own code, such as turnout 9, turnout 12, turnout 18 and so on. This code is not randomly arranged. It actually represents the cotangent of the frog angle (α). The smaller the frog angle α, the larger the turnout number and the larger the radius of the guide curve. The smoother it is, the higher the allowable crossover speed is. Therefore, the use of large turnouts is beneficial for train operation. However, things always have their two sides. The larger the number of turnouts, the longer the turnouts, the higher the cost and the larger the land occupation. The manufacturer of plastic dowel in sleeper tells you what number of turnouts to use, which should be adapted to local conditions and specific conditions, and cannot be generalized.