turnouts- points and crossing.pptx Railway

Railway Engineering

1. Turnouts - Points and Crossings Definition: Functions of points and crossing Turnouts Component parts of turnouts.

2. Typical Right hand Turnout

3. Component Parts of a Turnout 1. A pair of tongue rails 2. A pair of stock rails 3. Two check rails 4. Four lead rails 5. A Vee crossing 6. Slide chairs 7. Stretcher bar 8. A pair of heel blocks 9. Switch tie plate or gauge 10. Parts for operating points-Rods, cranks, levers etc 11. Locking system which includes locking box, lockbar , plunger bar etc

4. Right hand turnouts

5. Left hand Turnout

6. Points or Switches

7. Parts of switches Pair of stock rail Pair of tongue rails Heel block or distance block Stretcher bar Switch tie plate Slide chair Stops studs Types of Switches Stub Split ( i . Loose heel type ii. Fixed heel type )

8. Crossings Parts of Crossings A vee piece Point and splice rails Two Wing rails Two Check rails Chairs at crossing, at toe and at heel Blocks at throat , at nose, at heel Requirements of a ideal crossings

9. Types of crossing On the basis of shape Acute angle Obtuse angle Square On the basis of assembly Spring crossing Cross over Scissor Diamond Ladder tracks or gathering lines

10. Acute angle crossing

11. Square crossing

12. Spring Crossing

13. Diamond Crossing

14. Scissor crossing

15. Gathering Lines or Ladder tracks

16. Triangle junction

17. Single and Double slip junction