The Componients of Railway Turnout

Edit:Zongxiang Heavy Industry--Jolin Date:2023-01-10 16:57:44

Turnouts and crossovers, including switches, frogs, guard rails, stock rails, and closure rails; rail fastening assembles unique to turnouts; and miscellaneous components associated with turnouts, including switch rods and gauge plates. Crossover tracks, double crossovers including the central crossing frogs or diamond area, and single and double slip switches are included in this category. The cross ties to support turnouts and crossovers can also be considered part of special trackwork, especially concrete switch ties, which require far more design and fabrication effort than ordinary timber switch ties.
railway turnout for 24kg rail

Track crossings that permit one track to cross another at grade. Such crossings can be designed as a rigid block or can include movable center points.

Point- switch rails or pint blades

Are the movable rails which guide the wheels towards either the straight or the diverging track. They are tapered on most switches, but on stub switches they have square ends. In ordinary conversation, it is common to use the word “switch” when referring to a turnout, which is technically incorrect.

Stock rails

Are the running rails immediately alongside of the switch rails against which the switch rails lay when in the closed position. The stock rails are otherwise ordinary rails that are machined, drilled, and bent as required to suit the design of the turnout switch and the individual switch point rails.

Frog

Is a component placed where one rail crosses another, refers to the crossing point of two rails. The rest of the English-speaking world calls such units by the more obvious term “crossing”.

Closure rails

Are the straight or curved rails that are positioned in between the heel of switch and the toe of frog.

Check rail

Is a short piece of rail placed alongside the main stock rail opposite the frog. These exist to ensure that the wheels follow the appropriate flange way through the frog and that the train does not derail.

Heel rail

Assemblies are units placed at the heel of the switch that provide a splice with the contiguous closure rail and a location for the switch point rail to pivot at a fixed spread distance from the stock rail.

Switch point rail

stops act as spaces between the switch point rail and the stock rail. Stops laterally support the switch point from flexing laterally under a lateral wheel load and thereby possibly exposing the open end of switch point rail to head-on contact from the next wheel.

A switch operating device

Moves switch rails. Switch rails can be thrown (moved) from one orientation to another by either a hand-operated?manual? switch stand or a mechanically or elector-mechanically (power-operated) switch machine. In both cases, the operating devices are positioned at the beginning of the turnout opposite the switch-connecting rods near the point of the switch rails.