Various types of gates, their important components

Presentation on Various types of gates, their important components was done by Shri D.K.Mehta, Retired Chief Engineer, CWC, during One Day Seminar on Safety Inspection and O & M of gates for dams, canals etc conducted by Gujarat State Center of The Institution of Engineers (India) at Ahmedabad on July 3, 2015.
Video of this presentation can be seen on facebook as well as Youtube page of IEIGSC.

1. Various Types of Gates, Their important components and their Functions. BY : D.K Mehta

2. Introduction The Hydro-Mechanical Equipments are provided to control the flows to facilitate planned and controlled reservoir operation, and also for maintenance purposes. Further it also includes the machinery to operate it. Hydro Mechanical Works can be classified into two major branches : GATES HOISTING EQUIPMENT Hydro-Mechanical Equipment

3. GATES A gate is a closure device in which a leaf is moved across the fluid way from an external position to control flow of water Depending upon the head the gates are also further classified as: a) Low Head (H< 15 m) b) Medium Head ( 15< H <30) c) High Head ( H>30)

4. Common types of Gates in India Spillway Crest Orifice Spillway Radial Gate Fixed wheel type gates Slide Type Vertical Lift Gates

5. Overview of Dam TUNGABHADRA DAM

6. Overview of Dam

7. Downstream view of Spillway

8. Downstream view of Spillway

9. Radial Gate Radial Gate with hydraulic hoist

10. Radial Gate

11. Radial Gate-Shop Assembly

12. Top Seal Radial Gate

13. Fixed-wheel Gate

14. Fixed Wheel Gate

15. Slide Gate Slide Gate

16. High Head Slide Gate

17. Stop-logs (Slide Type)

18. Hoisting Equipments A device serving to move (open, close or hold) a gate including all controls. Common Types of Hosting Equipments in India Rope drum hoist Monorail Crane Operating Equipment Hydraulic hoist Screw hoist Gantry Crane

19. Rope Drum Hoist

20. Rope Drum Hoist

21. Rope Drum Hoist

22. Hydraulic Hoist

23. Hydraulic Hoist

24. Types of Hoisting Equipment Screw Hoist

25. Screw Hoist

26. Gantry Crane

27. Gantry Crane

28. Monorail crane

29. Materials for the components of Radial Gates Component Part Recommended Materials Skin Plate, Stiffners , - Structural Steel horizontal girders, arms, bracings, tie members, anchorage, girder, yoke girder, rest girder. Trunnion hub and bracket - Cast steel, Structural Steel, Forged Steel Pin - Stainless Steel, Corrosion resisting steel Bushing - Bronze, Self lubricating Seal Seat - Stainless steel Seal base and sill beam - Structural steel

30. Materials for the components of Fixed-Wheel Gates Component Part Recommended Materials Wheel - Cast steel, Cast iron, Forged steel Bearing/Bushing - Anti-friction bearing/bronze. Wheel Pins or axles - Chrome nickel steel or corrosion resistance steel Structural parts of gate leaf, - Carbon steel, structural steel track base etc. Seal - Rubber Wheel Track - Stainless steel, corrosion resisting steel Seal seat - Stainless steel plate Seal base, seal beam - Structural steel Seal clamp - Structural steel, stainless steel Guide - Structural steel/stainless steel Springs - Spring steel, stainless steel Anchor Bolts - Structural Steel Guide Rollers and guide shoes - Structural steel, cast iron, cast steel.

31. Materials for the components of Medium and High Head Slide Gates Component Part Recommended Materials Gate leaf, sill girder bodies, - Forged steel, Structural steel bonnet and bonnet cover Gate Frames - Cast iron, structural steel Seal seats, bearing plate - Bronze, Corrosion resisting steel and bottom seat Guide bars - Bronze Guides - Brass, Corrosion resistant steel clamps - Corrosion resistant steel Fixing screws/bolts - Mild steel, Stainless steel Gland stuffing box a. Body and stuffing collar - Structural Steel, Cast iron. b. Bushing and Bushing Collar - Bronze c. Seals - Rubber, Chevron, Fluro carbon coated

32. Basic IS Codes IS 13623 – Criteria for choice of gates and hoist. IS 4622 - Recommendations for structural design of fixed wheel gate. IS 4623 – Recommendations for structural design of radial gate. IS 5620 – Recommendations for structural design of low head slide gate. IS 9349 - Recommendations for structural design of medium and high head slide gate. IS 6938 – Design of Rope drum and chain hoists for hydraulic gates. IS 10210 – Criteria for design of hydraulic hoists for gates IS 11288 – Recommendations for design of screw hoists and hydraulic gates IS 807 – Design, erection and testing (structural portion) of cranes and hoists – code of practice.

33. Continued… IS 3177 – Code of Practice for electric overhead travelling cranes and gantry cranes other than steel work cranes. IS 13591 – Criteria for design of lifting beams IS 11855 – Guidelines for design and use of different types of rubber seals for hydraulic gates IS 15466 – Rubber seals for hydraulic gates – specification. IS 14177 – Guidelines for painting system for hydraulic gates and hoists. Basic Codes IS 800 – General construction in steel – code of practice IS 456 – Code of practice for plain and reinforced concrete

34. THANK YOU