Points and crossing
- 1. Point and Crossing Made By :– Akash patel(131040106018) Guided By: Prof. sadanand sadhu GUJARAT POWER ENGINEERING & RESEARCH INSTITUTE
- 2. Points and Crossing Points and crossings are provided to transfer trains from one track to another: POINT (SWITCH): The device that is use to divert the wheels CROSSING: Gaps in the rail that enables the actual diversion TURNOUT: Complete set of points and crossing including the main (lead) rail: 1) LEFT HAND TURNOUT 2) RIGHT HAND TURNOUT
- 4. Turn Out: • Turnout: Turnout is the simplest combination of point and crossing by operation of which train is diverted to another track. • A Turnout may be two type: 1. A right hand turnout 2. A left hand turnout
- 5. Right Hand Turnout: If a train is diverted from main track is diverted to the right of the main route in the facing direction, then the diversion is known as RIGHT HAND TURNOUT.
- 6. Left Hand Turnout: If a train is diverted from main track is diverted to the left of the main route in the facing direction, then the diversion is known as LEFT HAND TURNOUT.
- 7. Right hand turnout with full components
- 9. • Stock rail: It is the running rail against which a tongue rail operates. • Tongue rail: It is a tapered movable rail, made of high carbon or manganese steel to withstand wear. At this end, it is attached to a running rail. A tongue rail is also called a switch rail. • Heel Block: These blocks are inserted between the heel of the tongue rail and stock rail. These are made of C.I. and are used to provide a clear gap for the wheel flange.
- 10. • Switch tie plate: This is provided below the slide chairs at the toe. There are two butt straps at the ends to ensure the definite location of slide chair and hence of the rails. Standard sections are 25×1.25 cm for BG and 22.5×0.9 cm for MG. • Stretcher bar: The toes of both the tongue rails are connected together by means of stretcher bars, so that each tongue moves through the same distance or gap while changing the points. Generally two or three bars are used near the toe.
- 12. Types Of Switches: • There are two types of switches: 1. Stub switch 2. Split switch • Split switch are of two types: a. Loose heel type b. Fixed heel type
- 14. CROSSINGS: • A Crossing is a device which provide two flangeways through which the wheels of the flanges may move, when two rails intersect each other at an angle.
- 15. • Types of crossings: Based on shape of crossing: 1. Actual angle crossing 2. obtuse angle crossing 3. Right angle crossing Based on assembly of crossing: 1. Spring crossing 2. Cross crossing 3. Diamond crossing 4. Scissors crossing 5. Ladder track or gathering line
- 16. Actual angle crossing Obtuse angle crossing Right angle crossing
- 17. Spring crossing cross over Diamond crossing