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Railroad Switch Description:
A railroad
switch , turnout, is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or
where a spur or siding branches off.
Classification
Single Rail Switch
The
main track of single rail switch is straight line, the siding bifurcates from
main track to left or right side. Generally, a set of single rail switch is
made up of switch, rail frog,
guide rails and connection parts. Single rail switch has wide applications that
reach 90% of all kinds of rail switches. In a complete set of single rail
switch, there is a gap in the frog that limits the train speed. Movable-point
frog is an effective way to increase the switch crossing speed.
Driving Rail Switch
To meet the needs of parallel operation, driven rail switches
that are not on the way to the specified position and lock them when arranging
the route. However, different from the protective rail switch, the protective
rail switch should be checked for its interlocking conditions by the access
road. The driven switch does not check the switch lock condition, and the
opening signal can be established even if the driving switch is not in the
specified position during the route alignment.
Equilateral Rail Switch
Equilateral rail switch includes two roads bifurcate from
main track to right and left. Parts of a rail switch arrange symmetrically
lining the bisector of railroad switch frog angle. Two connecting steel rails
have same curve radius, there is no difference in running conditions.
Equilateral rail switch has advantages in increasing radius of lead curve and
shortening the length of station. Therefore, the equilateral rail switch can be
applied in the head or tail of switchyard. The equilateral rail switch is also
used with the single rail switch if necessary.
Three-way Rail Switch
Three-way rail switch, also known as compound heterotopic
symmetric switch, is a common type of compound switch. It is equivalent to two
sets of single switch switches which connect to different sides, but its length
is much shorter than the sum of the two sets of single rail switches. Three-way
switch by a set of switches, operating conditions are poor, not very difficult,
should not be used.
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