Single turnout, its main line to a straight line, lateral line from the main line to the left or right fork out, also known as left and right turnout turnout, the turnout of the total number of accounts for various types of more than 90%. The following outlines the composition of a single turnout. Single turnout from the switching point, rut crossing, guard rail and sleepers and connecting part of the composition. Switching point is used to guide the rolling line is shifted from the lateral line or lines from the side of the line shift are the steering equipment; rut fork and guard rail is to make the wheels rolling over the rail by a stream of the transition to another stock rail equipment; switching points device and the connection part connected by the bifurcated rut. By a switching point on the tip rail, a pair of the basic tracks, switching points and some devices connected parts of the composition. Device switching point device, also known as switchman, by the gate seat and said control switch, rod, bar and other components Po, since the operating point of the swing and track switch to change the opening direction. Set in almost exactly the turnout and the turnout rail siding at the intersection of main line rail, guard rail at almost exactly the turnout on both sides. Bifurcated from the wing rail and frog hearts fork composed of wing rail is bent fork heart next to the two rails, the wheel fork out the heart of the transition device. Two sides of the heart work fork angle, called the frog angle, angle of the cotangent of frog calls frog numbers. The role of the connection part is connected to a switching point and the rut bifurcated, straight stock and song he shares two parts, direct shares and ordinary straight line, like, music stocks generally circular curve, also called the derivative curve. 
 Single turnout is divided from the main road to the Deputy Road turnouts part, divided left and right turnout Turnout two. Single turnout from the switching point, frog and guard rail, connecting parts. 
 Single turnout rail per meter for its quality and turnout numbers distinguish between the types. At present, China's rail with 75kg / m, 60kg / m, 50kg / m, 45kg / m and 43kg / m and other types of standard turnout numbers (numbers used to represent the frog) are 6,7,9,12,18 , 24, etc., which only 6,7 number two factories and mines within the rail or hump, the other is for the number of railway line and station lines, and 9 and 12 most commonly used. High-speed trains in the lateral line of the lot, you need to lay 18, 24, and other large number of single turnout. 
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