Points And Crossings In Railways Pdf
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- points and crossings in railways pdf
- Railroad switch
- Points and Crossings Railway | Signalling & Interlocking
- Rail and points and crossings Services
A line consists of two rails running parallel to each other.
points and crossings in railways pdf
Types of switches Stud switch No separate tongue rail is provided and some portion of the track is moved from one side to the other side Not in use on Indian Railways. Split switch It consist of a pair of stock rails and a pair of tongue rails. It is of two types loose heel type and fixed heal type. As the discontinuity of the track at the heal is a weakness in the structure, the use of these switches is not preferred. The movement at the toe of the switch is made possible on account of the flexibility of the tongue rail. Toe of switches It is of the following types Undercut switch: In this switch the foot of the stock rail is planed to accommodate the tongue rail. Overriding switch: stock rail occupies the full section and the tongue rail is planed to a 6-mm thick edge, which overrides the foot of the stock rail This design is considered to be an economical and superior design due to the reasons given below: Since the stock rail is uncut, it is much stronger Manufacturing work is confined only to the tongue rail, which is very.
The throw bar or tie bar ties the points together and controls their movement from side to side. Single panels can be removed and replaced from anywhere within the crossing area. Deep screening of ballast Points, Crossings and Yards of Railways The arrangements by which different routes, diverging from the first track, are connected to faciliate the diversion of trains from one track to another track without any obstruction are known as points and crossings. Drainage in station yards Points and Crossings.
Point and Crossings are peculiar arrangement used in permanent way railway track to guide the vehicle for directional change. Points and Crossings Railway :-These are the arrangements provided in a railway track to divert a train from main line to branch line. A complete set of points and crossings, along with lead rails, is called a turnout. Throw of switch Contact France. Lubrication of rail joints Signalling and Interlocking: Objectives of signaling, classification of signals, systems for controlling train movement, interlocking, modern signaling installations.
g) Check rails shall be at the same top of rail level as the running rail. h) The crossing nose shall be 14mm wide; the distance from the theoretical.
Points and Crossings Railway | Signalling & Interlocking
A railroad switch AE , turnout , or [ set of ] points BE 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. The switch consists of the pair of linked tapering rails, known as points switch rails or point blades , lying between the diverging outer rails the stock rails. These points can be moved laterally into one of two positions to direct a train coming from the point blades toward the straight path or the diverging path. A train moving from the narrow end toward the point blades i. Unless the switch is locked, a train coming from either of the converging directs will pass through the points onto the narrow end, regardless of the position of the points, as the vehicle's wheels will force the points to move.
Points and crossings should be inspected in detail, as the quality of a train ride greatly depends on their maintenance. The following important points should be checked. Badly worn out rails should be replaced.
Rail and points and crossings Services
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